[ubicom32]: move new files out from platform support patch

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19815 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ubicom32/files/drivers/char/hw_random/ubicom32-rng.c

@@ -0,0 +1,105 @@
+/*
+ * drivers/net/ubi32-eth.c
+ *   Ubicom32 hardware random number generator driver.
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/hw_random.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+#include <asm/ip5000.h>
+
+#define MODULE_NAME "ubicom32_rng"
+
+static int ubicom32_rng_data_present(struct hwrng *rng, int wait)
+{
+	int data, i;
+
+	for (i = 0; i < 20; i++) {
+		data = *(int *)(TIMER_BASE + TIMER_TRN);
+		if (data || !wait)
+			break;
+		udelay(10);
+	}
+	return data;
+}
+
+static int ubicom32_rng_data_read(struct hwrng *rng, u32 *data)
+{
+	*data = *(int *)(TIMER_BASE + TIMER_TRN);
+	return 4;
+}
+
+static int ubicom32_rng_init(struct hwrng *rng)
+{
+	printk(KERN_INFO "ubicom32 rng init\n");
+	*(int *)(TIMER_BASE + TIMER_TRN_CFG) = TIMER_TRN_CFG_ENABLE_OSC;
+	return 0;
+}
+
+static void ubicom32_rng_cleanup(struct hwrng *rng)
+{
+	printk(KERN_INFO "ubicom32 rng cleanup\n");
+	*(int *)(TIMER_BASE + TIMER_TRN_CFG) = 0;
+}
+
+static struct hwrng ubicom32_rng = {
+	.name		= MODULE_NAME,
+	.init		= ubicom32_rng_init,
+	.cleanup	= ubicom32_rng_cleanup,
+	.data_present	= ubicom32_rng_data_present,
+	.data_read	= ubicom32_rng_data_read,
+	.priv		= 0,
+};
+
+static int __init mod_init(void)
+{
+	int err;
+
+	printk(KERN_INFO "ubicom32 rng started\n");
+	err = hwrng_register(&ubicom32_rng);
+	if (err) {
+		printk(KERN_ERR "ubicom32 rng register failed (%d)\n",
+			err);
+	}
+
+	return err;
+}
+
+static void __exit mod_exit(void)
+{
+	printk(KERN_INFO "ubicom32 rng stopped\n");
+	hwrng_unregister(&ubicom32_rng);
+}
+
+module_init(mod_init);
+module_exit(mod_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ubicom, Inc.");
+MODULE_DESCRIPTION("H/W rng driver for ubicom32 processor");
+MODULE_VERSION("1:1.0.a");

target/linux/ubicom32/files/drivers/mmc/host/ubicom32sd.c

@@ -0,0 +1,773 @@
+/*
+ * drivers/mmc/host/ubicom32sd.c
+ *	Ubicom32 Secure Digital Host Controller Interface driver
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/scatterlist.h>
+#include <linux/leds.h>
+#include <linux/gpio.h>
+#include <linux/mmc/host.h>
+
+#include <asm/ubicom32sd.h>
+
+#define DRIVER_NAME "ubicom32sd"
+
+#define sd_printk(...)
+//#define sd_printk printk
+
+#define SDTIO_VP_VERSION	3
+
+#define SDTIO_MAX_SG_BLOCKS	16
+
+enum sdtio_commands {
+	SDTIO_COMMAND_NOP,
+	SDTIO_COMMAND_SETUP,
+	SDTIO_COMMAND_SETUP_SDIO,
+	SDTIO_COMMAND_EXECUTE,
+	SDTIO_COMMAND_RESET,
+};
+
+#define SDTIO_COMMAND_SHIFT			24
+#define SDTIO_COMMAND_FLAG_STOP_RSP_CRC		(1 << 10)
+#define SDTIO_COMMAND_FLAG_STOP_RSP_136		(1 << 9)
+#define SDTIO_COMMAND_FLAG_STOP_RSP		(1 << 8)
+#define SDTIO_COMMAND_FLAG_STOP_CMD		(1 << 7)
+#define SDTIO_COMMAND_FLAG_DATA_STREAM		(1 << 6)
+#define SDTIO_COMMAND_FLAG_DATA_RD		(1 << 5)
+#define SDTIO_COMMAND_FLAG_DATA_WR		(1 << 4)
+#define SDTIO_COMMAND_FLAG_CMD_RSP_CRC		(1 << 3)
+#define SDTIO_COMMAND_FLAG_CMD_RSP_136		(1 << 2)
+#define SDTIO_COMMAND_FLAG_CMD_RSP		(1 << 1)
+#define SDTIO_COMMAND_FLAG_CMD			(1 << 0)
+
+/*
+ * SDTIO_COMMAND_SETUP_SDIO
+ */
+#define SDTIO_COMMAND_FLAG_SDIO_INT_EN		(1 << 0)
+
+/*
+ * SDTIO_COMMAND_SETUP
+ *      clock speed in arg
+ */
+#define SDTIO_COMMAND_FLAG_4BIT                 (1 << 3)
+#define SDTIO_COMMAND_FLAG_1BIT                 (1 << 2)
+#define SDTIO_COMMAND_FLAG_SET_CLOCK            (1 << 1)
+#define SDTIO_COMMAND_FLAG_SET_WIDTH            (1 << 0)
+
+#define SDTIO_COMMAND_FLAG_CMD_RSP_MASK		(SDTIO_COMMAND_FLAG_CMD_RSP | SDTIO_COMMAND_FLAG_CMD_RSP_136)
+#define SDTIO_COMMAND_FLAG_STOP_RSP_MASK	(SDTIO_COMMAND_FLAG_STOP_RSP | SDTIO_COMMAND_FLAG_STOP_RSP_136)
+#define SDTIO_COMMAND_FLAG_RSP_MASK		(SDTIO_COMMAND_FLAG_CMD_RSP_MASK | SDTIO_COMMAND_FLAG_STOP_RSP_MASK)
+
+struct sdtio_vp_sg {
+	volatile void		*addr;
+	volatile u32_t		len;
+};
+
+#define SDTIO_VP_INT_STATUS_DONE		(1 << 31)
+#define SDTIO_VP_INT_STATUS_SDIO_INT		(1 << 10)
+#define SDTIO_VP_INT_STATUS_DATA_CRC_ERR	(1 << 9)
+#define SDTIO_VP_INT_STATUS_DATA_PROG_ERR	(1 << 8)
+#define SDTIO_VP_INT_STATUS_DATA_TIMEOUT	(1 << 7)
+#define SDTIO_VP_INT_STATUS_STOP_RSP_CRC	(1 << 6)
+#define SDTIO_VP_INT_STATUS_STOP_RSP_TIMEOUT	(1 << 5)
+#define SDTIO_VP_INT_STATUS_CMD_RSP_CRC		(1 << 4)
+#define SDTIO_VP_INT_STATUS_CMD_RSP_TIMEOUT	(1 << 3)
+#define SDTIO_VP_INT_STATUS_CMD_TIMEOUT		(1 << 2)
+#define SDTIO_VP_INT_STATUS_CARD1_INSERT	(1 << 1)
+#define SDTIO_VP_INT_STATUS_CARD0_INSERT	(1 << 0)
+
+struct sdtio_vp_regs {
+	u32_t				version;
+	u32_t				f_max;
+	u32_t				f_min;
+
+	volatile u32_t			int_status;
+
+	volatile u32_t			command;
+	volatile u32_t			arg;
+
+	volatile u32_t			cmd_opcode;
+	volatile u32_t			cmd_arg;
+	volatile u32_t			cmd_rsp0;
+	volatile u32_t			cmd_rsp1;
+	volatile u32_t			cmd_rsp2;
+	volatile u32_t			cmd_rsp3;
+
+	volatile u32_t			stop_opcode;
+	volatile u32_t			stop_arg;
+	volatile u32_t			stop_rsp0;
+	volatile u32_t			stop_rsp1;
+	volatile u32_t			stop_rsp2;
+	volatile u32_t			stop_rsp3;
+
+	volatile u32_t			data_timeout_ns;
+	volatile u16_t			data_blksz;
+	volatile u16_t			data_blkct;
+	volatile u32_t			data_bytes_transferred;
+	volatile u32_t			sg_len;
+	struct sdtio_vp_sg		sg[SDTIO_MAX_SG_BLOCKS];
+};
+
+struct ubicom32sd_data {
+	const struct ubicom32sd_platform_data	*pdata;
+
+	struct mmc_host				*mmc;
+
+	/*
+	 * Lock used to protect the data structure
+	spinlock_t				lock;
+	 */
+	int	int_en;
+	int	int_pend;
+
+	/*
+	 * Receive and transmit interrupts used for communicating
+	 * with hardware
+	 */
+	int					irq_tx;
+	int					irq_rx;
+
+	/*
+	 * Current outstanding mmc request
+	 */
+	struct mmc_request			*mrq;
+
+	/*
+	 * Hardware registers
+	 */
+	struct sdtio_vp_regs			*regs;
+};
+
+/*****************************************************************************\
+ *                                                                           *
+ * Suspend/resume                                                            *
+ *                                                                           *
+\*****************************************************************************/
+
+#if 0//def CONFIG_PM
+
+int ubicom32sd_suspend_host(struct ubicom32sd_host *host, pm_message_t state)
+{
+	int ret;
+
+	ret = mmc_suspend_host(host->mmc, state);
+	if (ret)
+		return ret;
+
+	free_irq(host->irq, host);
+
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(ubicom32sd_suspend_host);
+
+int ubicom32sd_resume_host(struct ubicom32sd_host *host)
+{
+	int ret;
+
+	if (host->flags & UBICOM32SD_USE_DMA) {
+		if (host->ops->enable_dma)
+			host->ops->enable_dma(host);
+	}
+
+	ret = request_irq(host->irq, ubicom32sd_irq, IRQF_SHARED,
+			  mmc_hostname(host->mmc), host);
+	if (ret)
+		return ret;
+
+	ubicom32sd_init(host);
+	mmiowb();
+
+	ret = mmc_resume_host(host->mmc);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+EXPORT_SYMBOL_GPL(ubicom32sd_resume_host);
+
+#endif /* CONFIG_PM */
+
+/*
+ * ubicom32sd_send_command_sync
+ */
+static void ubicom32sd_send_command_sync(struct ubicom32sd_data *ud, u32_t command, u32_t arg)
+{
+	ud->regs->command = command;
+	ud->regs->arg = arg;
+	ubicom32_set_interrupt(ud->irq_tx);
+	while (ud->regs->command) {
+		ndelay(100);
+	}
+}
+
+/*
+ * ubicom32sd_send_command
+ */
+static void ubicom32sd_send_command(struct ubicom32sd_data *ud, u32_t command, u32_t arg)
+{
+	ud->regs->command = command;
+	ud->regs->arg = arg;
+	ubicom32_set_interrupt(ud->irq_tx);
+}
+
+/*
+ * ubicom32sd_reset
+ */
+static void ubicom32sd_reset(struct ubicom32sd_data *ud)
+{
+	ubicom32sd_send_command_sync(ud, SDTIO_COMMAND_RESET << SDTIO_COMMAND_SHIFT, 0);
+	ud->regs->int_status = 0;
+}
+
+/*
+ * ubicom32sd_mmc_request
+ */
+static void ubicom32sd_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+	struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+	u32_t command = SDTIO_COMMAND_EXECUTE << SDTIO_COMMAND_SHIFT;
+	int ret = 0;
+
+	WARN(ud->mrq != NULL, "ud->mrq still set to %p\n", ud->mrq);
+	//pr_debug("send cmd %08x arg %08x flags %08x\n", cmd->opcode, cmd->arg, cmd->flags);
+
+	if (mrq->cmd) {
+		struct mmc_command *cmd = mrq->cmd;
+
+		sd_printk("%s:\t\t\tsetup cmd %02d arg %08x flags %08x\n", mmc_hostname(mmc), cmd->opcode, cmd->arg, cmd->flags);
+
+		ud->regs->cmd_opcode = cmd->opcode;
+		ud->regs->cmd_arg = cmd->arg;
+
+		command |= SDTIO_COMMAND_FLAG_CMD;
+
+		if (cmd->flags & MMC_RSP_PRESENT) {
+			command |= SDTIO_COMMAND_FLAG_CMD_RSP;
+		}
+
+		if (cmd->flags & MMC_RSP_136) {
+			command |= SDTIO_COMMAND_FLAG_CMD_RSP_136;
+		}
+
+		if (cmd->flags & MMC_RSP_CRC) {
+			command |= SDTIO_COMMAND_FLAG_CMD_RSP_CRC;
+		}
+	}
+
+	if (mrq->data) {
+		struct mmc_data *data = mrq->data;
+		struct scatterlist *sg = data->sg;
+		int i;
+
+printk("%s:\t\t\tsetup data blksz %d num %d sglen=%d fl=%08x Tns=%u\n", mmc_hostname(mmc), data->blksz, data->blocks, data->sg_len, data->flags, data->timeout_ns);
+
+		sd_printk("%s:\t\t\tsetup data blksz %d num %d sglen=%d fl=%08x Tns=%u\n",
+			  mmc_hostname(mmc), data->blksz, data->blocks, data->sg_len,
+			  data->flags, data->timeout_ns);
+
+		if (data->sg_len > SDTIO_MAX_SG_BLOCKS) {
+			ret = -EINVAL;
+			data->error = -EINVAL;
+			goto fail;
+		}
+
+		ud->regs->data_timeout_ns = data->timeout_ns;
+		ud->regs->data_blksz = data->blksz;
+		ud->regs->data_blkct = data->blocks;
+		ud->regs->sg_len = data->sg_len;
+
+		/*
+		 * Load all of our sg list into the driver sg buffer
+		 */
+		for (i = 0; i < data->sg_len; i++) {
+			sd_printk("%s: sg %d = %p %d\n", mmc_hostname(mmc), i, sg_virt(sg), sg->length);
+			ud->regs->sg[i].addr = sg_virt(sg);
+			ud->regs->sg[i].len = sg->length;
+			if (((u32_t)ud->regs->sg[i].addr & 0x03) || (sg->length & 0x03)) {
+				sd_printk("%s: Need aligned buffers\n", mmc_hostname(mmc));
+				ret = -EINVAL;
+				data->error = -EINVAL;
+				goto fail;
+			}
+			sg++;
+		}
+		if (data->flags & MMC_DATA_READ) {
+			command |= SDTIO_COMMAND_FLAG_DATA_RD;
+		} else if (data->flags & MMC_DATA_WRITE) {
+			command |= SDTIO_COMMAND_FLAG_DATA_WR;
+		} else if (data->flags & MMC_DATA_STREAM) {
+			command |= SDTIO_COMMAND_FLAG_DATA_STREAM;
+		}
+	}
+
+	if (mrq->stop) {
+		struct mmc_command *stop = mrq->stop;
+		sd_printk("%s: \t\t\tsetup stop %02d arg %08x flags %08x\n", mmc_hostname(mmc), stop->opcode, stop->arg, stop->flags);
+
+		ud->regs->stop_opcode = stop->opcode;
+		ud->regs->stop_arg = stop->arg;
+
+		command |= SDTIO_COMMAND_FLAG_STOP_CMD;
+
+		if (stop->flags & MMC_RSP_PRESENT) {
+			command |= SDTIO_COMMAND_FLAG_STOP_RSP;
+		}
+
+		if (stop->flags & MMC_RSP_136) {
+			command |= SDTIO_COMMAND_FLAG_STOP_RSP_136;
+		}
+
+		if (stop->flags & MMC_RSP_CRC) {
+			command |= SDTIO_COMMAND_FLAG_STOP_RSP_CRC;
+		}
+	}
+
+	ud->mrq = mrq;
+
+	sd_printk("%s: Sending command %08x\n", mmc_hostname(mmc), command);
+
+	ubicom32sd_send_command(ud, command, 0);
+
+	return;
+fail:
+	sd_printk("%s: mmcreq ret = %d\n", mmc_hostname(mmc), ret);
+	mrq->cmd->error = ret;
+	mmc_request_done(mmc, mrq);
+}
+
+/*
+ * ubicom32sd_mmc_set_ios
+ */
+static void ubicom32sd_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+	struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+	u32_t command = SDTIO_COMMAND_SETUP << SDTIO_COMMAND_SHIFT;
+	u32_t arg = 0;
+	sd_printk("%s: ios call bw:%u pm:%u clk:%u\n", mmc_hostname(mmc), 1 << ios->bus_width, ios->power_mode, ios->clock);
+
+	switch (ios->bus_width) {
+	case MMC_BUS_WIDTH_1:
+		command |= SDTIO_COMMAND_FLAG_SET_WIDTH | SDTIO_COMMAND_FLAG_1BIT;
+		break;
+
+	case MMC_BUS_WIDTH_4:
+		command |= SDTIO_COMMAND_FLAG_SET_WIDTH | SDTIO_COMMAND_FLAG_4BIT;
+		break;
+	}
+
+	if (ios->clock) {
+		arg = ios->clock;
+		command |= SDTIO_COMMAND_FLAG_SET_CLOCK;
+	}
+
+	switch (ios->power_mode) {
+
+	/*
+	 * Turn off the SD bus (power + clock)
+	 */
+	case MMC_POWER_OFF:
+		gpio_set_value(ud->pdata->cards[0].pin_pwr, !ud->pdata->cards[0].pwr_polarity);
+		command |= SDTIO_COMMAND_FLAG_SET_CLOCK;
+		break;
+
+	/*
+	 * Turn on the power to the SD bus
+	 */
+	case MMC_POWER_ON:
+		gpio_set_value(ud->pdata->cards[0].pin_pwr, ud->pdata->cards[0].pwr_polarity);
+		break;
+
+	/*
+	 * Turn on the clock to the SD bus
+	 */
+	case MMC_POWER_UP:
+		/*
+		 * Done above
+		 */
+		break;
+	}
+
+	ubicom32sd_send_command_sync(ud, command, arg);
+
+	/*
+	 * Let the power settle down
+	 */
+	udelay(500);
+}
+
+/*
+ * ubicom32sd_mmc_get_cd
+ */
+static int ubicom32sd_mmc_get_cd(struct mmc_host *mmc)
+{
+	struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+	sd_printk("%s: get cd %u %u\n", mmc_hostname(mmc), ud->pdata->cards[0].pin_cd, gpio_get_value(ud->pdata->cards[0].pin_cd));
+
+	return gpio_get_value(ud->pdata->cards[0].pin_cd) ?
+				ud->pdata->cards[0].cd_polarity :
+				!ud->pdata->cards[0].cd_polarity;
+}
+
+/*
+ * ubicom32sd_mmc_get_ro
+ */
+static int ubicom32sd_mmc_get_ro(struct mmc_host *mmc)
+{
+	struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+	sd_printk("%s: get ro %u %u\n", mmc_hostname(mmc), ud->pdata->cards[0].pin_wp, gpio_get_value(ud->pdata->cards[0].pin_wp));
+
+	return gpio_get_value(ud->pdata->cards[0].pin_wp) ?
+				ud->pdata->cards[0].wp_polarity :
+				!ud->pdata->cards[0].wp_polarity;
+}
+
+/*
+ * ubicom32sd_mmc_enable_sdio_irq
+ */
+static void ubicom32sd_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{
+	struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+
+	ud->int_en = enable;
+	if (enable && ud->int_pend) {
+		ud->int_pend = 0;
+		mmc_signal_sdio_irq(mmc);
+	}
+}
+
+/*
+ * ubicom32sd_interrupt
+ */
+static irqreturn_t ubicom32sd_interrupt(int irq, void *dev)
+{
+	struct mmc_host *mmc = (struct mmc_host *)dev;
+	struct mmc_request *mrq;
+	struct ubicom32sd_data *ud;
+	u32_t int_status;
+
+	if (!mmc) {
+		return IRQ_HANDLED;
+	}
+
+	ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+	if (!ud) {
+		return IRQ_HANDLED;
+	}
+
+	int_status = ud->regs->int_status;
+	ud->regs->int_status &= ~int_status;
+
+	if (int_status & SDTIO_VP_INT_STATUS_SDIO_INT) {
+		if (ud->int_en) {
+			ud->int_pend = 0;
+			mmc_signal_sdio_irq(mmc);
+		} else {
+			ud->int_pend++;
+		}
+	}
+
+	if (!(int_status & SDTIO_VP_INT_STATUS_DONE)) {
+		return IRQ_HANDLED;
+	}
+
+	mrq = ud->mrq;
+	if (!mrq) {
+		sd_printk("%s: Spurious interrupt", mmc_hostname(mmc));
+		return IRQ_HANDLED;
+	}
+	ud->mrq = NULL;
+
+	/*
+	 * SDTIO_VP_INT_DONE
+	 */
+	if (mrq->cmd->flags & MMC_RSP_PRESENT) {
+		struct mmc_command *cmd = mrq->cmd;
+		cmd->error = 0;
+
+		if ((cmd->flags & MMC_RSP_CRC) && (int_status & SDTIO_VP_INT_STATUS_CMD_RSP_CRC)) {
+			cmd->error = -EILSEQ;
+		} else if (int_status & SDTIO_VP_INT_STATUS_CMD_RSP_TIMEOUT) {
+			cmd->error = -ETIMEDOUT;
+			goto done;
+		} else if (cmd->flags & MMC_RSP_136) {
+			cmd->resp[0] = ud->regs->cmd_rsp0;
+			cmd->resp[1] = ud->regs->cmd_rsp1;
+			cmd->resp[2] = ud->regs->cmd_rsp2;
+			cmd->resp[3] = ud->regs->cmd_rsp3;
+		} else {
+			cmd->resp[0] = ud->regs->cmd_rsp0;
+		}
+		sd_printk("%s:\t\t\tResponse %08x %08x %08x %08x err=%d\n", mmc_hostname(mmc), cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3], cmd->error);
+	}
+
+	if (mrq->data) {
+		struct mmc_data *data = mrq->data;
+
+		if (int_status & SDTIO_VP_INT_STATUS_DATA_TIMEOUT) {
+			data->error = -ETIMEDOUT;
+			sd_printk("%s:\t\t\tData Timeout\n", mmc_hostname(mmc));
+			goto done;
+		} else if (int_status & SDTIO_VP_INT_STATUS_DATA_CRC_ERR) {
+			data->error = -EILSEQ;
+			sd_printk("%s:\t\t\tData CRC\n", mmc_hostname(mmc));
+			goto done;
+		} else if (int_status & SDTIO_VP_INT_STATUS_DATA_PROG_ERR) {
+			data->error = -EILSEQ;
+			sd_printk("%s:\t\t\tData Program Error\n", mmc_hostname(mmc));
+			goto done;
+		} else {
+			data->error = 0;
+			data->bytes_xfered = ud->regs->data_bytes_transferred;
+		}
+	}
+
+	if (mrq->stop && (mrq->stop->flags & MMC_RSP_PRESENT)) {
+		struct mmc_command *stop = mrq->stop;
+		stop->error = 0;
+
+		if ((stop->flags & MMC_RSP_CRC) && (int_status & SDTIO_VP_INT_STATUS_STOP_RSP_CRC)) {
+			stop->error = -EILSEQ;
+		} else if (int_status & SDTIO_VP_INT_STATUS_STOP_RSP_TIMEOUT) {
+			stop->error = -ETIMEDOUT;
+			goto done;
+		} else if (stop->flags & MMC_RSP_136) {
+			stop->resp[0] = ud->regs->stop_rsp0;
+			stop->resp[1] = ud->regs->stop_rsp1;
+			stop->resp[2] = ud->regs->stop_rsp2;
+			stop->resp[3] = ud->regs->stop_rsp3;
+		} else {
+			stop->resp[0] = ud->regs->stop_rsp0;
+		}
+		sd_printk("%s:\t\t\tStop Response %08x %08x %08x %08x err=%d\n", mmc_hostname(mmc), stop->resp[0], stop->resp[1], stop->resp[2], stop->resp[3], stop->error);
+	}
+
+done:
+	mmc_request_done(mmc, mrq);
+
+	return IRQ_HANDLED;
+}
+
+static struct mmc_host_ops ubicom32sd_ops = {
+	.request		= ubicom32sd_mmc_request,
+	.set_ios		= ubicom32sd_mmc_set_ios,
+	.get_ro			= ubicom32sd_mmc_get_ro,
+	.get_cd			= ubicom32sd_mmc_get_cd,
+	.enable_sdio_irq	= ubicom32sd_mmc_enable_sdio_irq,
+};
+
+/*
+ * ubicom32sd_probe
+ */
+static int __devinit ubicom32sd_probe(struct platform_device *pdev)
+{
+	struct ubicom32sd_platform_data *pdata = (struct ubicom32sd_platform_data *)pdev->dev.platform_data;
+	struct mmc_host *mmc;
+	struct ubicom32sd_data *ud;
+	struct resource *res_regs;
+	struct resource *res_irq_tx;
+	struct resource *res_irq_rx;
+	int ret;
+
+	/*
+	 * Get our resources, regs is the hardware driver base address
+	 * and the tx and rx irqs are used to communicate with the
+	 * hardware driver.
+	 */
+	res_regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	res_irq_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	res_irq_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
+	if (!res_regs || !res_irq_tx || !res_irq_rx) {
+		ret = -EINVAL;
+		goto fail;
+	}
+
+	/*
+	 * Reserve any gpios we need
+	 */
+	ret = gpio_request(pdata->cards[0].pin_wp, "sd-wp");
+	if (ret) {
+		goto fail;
+	}
+	gpio_direction_input(pdata->cards[0].pin_wp);
+
+	ret = gpio_request(pdata->cards[0].pin_cd, "sd-cd");
+	if (ret) {
+		goto fail_cd;
+	}
+	gpio_direction_input(pdata->cards[0].pin_cd);
+
+	/*
+	 * HACK: for the dual port controller on port F, we don't support the second port right now
+	 */
+	if (pdata->ncards > 1) {
+		ret = gpio_request(pdata->cards[1].pin_pwr, "sd-pwr");
+		gpio_direction_output(pdata->cards[1].pin_pwr, !pdata->cards[1].pwr_polarity);
+		gpio_direction_output(pdata->cards[1].pin_pwr, pdata->cards[1].pwr_polarity);
+	}
+
+	ret = gpio_request(pdata->cards[0].pin_pwr, "sd-pwr");
+	if (ret) {
+		goto fail_pwr;
+	}
+	gpio_direction_output(pdata->cards[0].pin_pwr, !pdata->cards[0].pwr_polarity);
+
+	/*
+	 * Allocate the MMC driver, it includes memory for our data.
+	 */
+	mmc = mmc_alloc_host(sizeof(struct ubicom32sd_data), &pdev->dev);
+	if (!mmc) {
+		ret = -ENOMEM;
+		goto fail_mmc;
+	}
+	ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+	ud->mmc = mmc;
+	ud->pdata = pdata;
+	ud->regs = (struct sdtio_vp_regs *)res_regs->start;
+	ud->irq_tx = res_irq_tx->start;
+	ud->irq_rx = res_irq_rx->start;
+	platform_set_drvdata(pdev, mmc);
+
+	ret = request_irq(ud->irq_rx, ubicom32sd_interrupt, IRQF_DISABLED, mmc_hostname(mmc), mmc);
+	if (ret) {
+		goto fail_mmc;
+	}
+
+	/*
+	 * Fill in the mmc structure
+	 */
+	mmc->ops = &ubicom32sd_ops;
+	mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_NEEDS_POLL | MMC_CAP_SDIO_IRQ |
+		    MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED;
+
+	mmc->f_min = ud->regs->f_min;
+	mmc->f_max = ud->regs->f_max;
+	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
+
+	/*
+	 * Setup some restrictions on transfers
+	 *
+	 * We allow up to SDTIO_MAX_SG_BLOCKS of data to DMA into, there are
+	 * not really any "max_seg_size", "max_req_size", or "max_blk_count"
+	 * restrictions (must be less than U32_MAX though), pick
+	 * something large?!...
+	 *
+	 * The hardware can do up to 4095 bytes per block, since the spec
+	 * only requires 2048, we'll set it to that and not worry about
+	 * potential weird blk lengths.
+	 */
+	mmc->max_hw_segs = SDTIO_MAX_SG_BLOCKS;
+	mmc->max_phys_segs = SDTIO_MAX_SG_BLOCKS;
+	mmc->max_seg_size = 1024 * 1024;
+	mmc->max_req_size = 1024 * 1024;
+	mmc->max_blk_count = 1024;
+
+	mmc->max_blk_size = 2048;
+
+	ubicom32sd_reset(ud);
+
+	/*
+	 * enable interrupts
+	 */
+	ud->int_en = 0;
+	ubicom32sd_send_command_sync(ud, SDTIO_COMMAND_SETUP_SDIO << SDTIO_COMMAND_SHIFT | SDTIO_COMMAND_FLAG_SDIO_INT_EN, 0);
+
+	mmc_add_host(mmc);
+
+	printk(KERN_INFO "%s at %p, irq %d/%d\n", mmc_hostname(mmc),
+			ud->regs, ud->irq_tx, ud->irq_rx);
+	return 0;
+
+fail_mmc:
+	gpio_free(pdata->cards[0].pin_pwr);
+fail_pwr:
+	gpio_free(pdata->cards[0].pin_cd);
+fail_cd:
+	gpio_free(pdata->cards[0].pin_wp);
+fail:
+	return ret;
+}
+
+/*
+ * ubicom32sd_remove
+ */
+static int __devexit ubicom32sd_remove(struct platform_device *pdev)
+{
+	struct mmc_host *mmc = platform_get_drvdata(pdev);
+
+	platform_set_drvdata(pdev, NULL);
+
+	if (mmc) {
+		struct ubicom32sd_data *ud = (struct ubicom32sd_data *)mmc_priv(mmc);
+
+		gpio_free(ud->pdata->cards[0].pin_pwr);
+		gpio_free(ud->pdata->cards[0].pin_cd);
+		gpio_free(ud->pdata->cards[0].pin_wp);
+
+		mmc_remove_host(mmc);
+		mmc_free_host(mmc);
+	}
+
+	/*
+	 * Note that our data is allocated as part of the mmc structure
+	 * so we don't need to free it.
+	 */
+	return 0;
+}
+
+static struct platform_driver ubicom32sd_driver = {
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner = THIS_MODULE,
+	},
+	.probe = ubicom32sd_probe,
+	.remove = __devexit_p(ubicom32sd_remove),
+#if 0
+	.suspend = ubicom32sd_suspend,
+	.resume = ubicom32sd_resume,
+#endif
+};
+
+/*
+ * ubicom32sd_init
+ */
+static int __init ubicom32sd_init(void)
+{
+	return platform_driver_register(&ubicom32sd_driver);
+}
+module_init(ubicom32sd_init);
+
+/*
+ * ubicom32sd_exit
+ */
+static void __exit ubicom32sd_exit(void)
+{
+    platform_driver_unregister(&ubicom32sd_driver);
+}
+module_exit(ubicom32sd_exit);
+
+MODULE_AUTHOR("Patrick Tjin");
+MODULE_DESCRIPTION("Ubicom32 Secure Digital Host Controller Interface driver");
+MODULE_LICENSE("GPL");

target/linux/ubicom32/files/drivers/net/ubi32-eth.c

@@ -0,0 +1,760 @@
+/*
+ * drivers/net/ubi32-eth.c
+ *   Ubicom32 ethernet TIO interface driver.
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+/*
+ * ubi32_eth.c
+ * Ethernet driver for Ip5k/Ip7K
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/moduleparam.h>
+
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+
+#include <linux/in.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/mii.h>
+#include <linux/if_vlan.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/skbuff.h>
+#include <asm/checksum.h>
+#include <asm/ip5000.h>
+#include <asm/devtree.h>
+#include <asm/system.h>
+
+#define UBICOM32_USE_NAPI	/* define this to use NAPI instead of tasklet */
+//#define UBICOM32_USE_POLLING	/* define this to use polling instead of interrupt */
+#include "ubi32-eth.h"
+
+/*
+ * TODO:
+ * mac address from flash
+ * multicast filter
+ * ethtool support
+ * sysfs support
+ * skb->nrfrag support
+ * ioctl
+ * monitor phy status
+ */
+
+extern int ubi32_ocm_skbuf_max, ubi32_ocm_skbuf, ubi32_ddr_skbuf;
+static const char *eth_if_name[UBI32_ETH_NUM_OF_DEVICES] =
+	{"eth_lan", "eth_wan"};
+static struct net_device *ubi32_eth_devices[UBI32_ETH_NUM_OF_DEVICES] =
+	{NULL, NULL};
+static u8_t mac_addr[UBI32_ETH_NUM_OF_DEVICES][ETH_ALEN] = {
+	{0x00, 0x03, 0x64, 'l', 'a', 'n'},
+	{0x00, 0x03, 0x64, 'w', 'a', 'n'}};
+
+#if (defined(CONFIG_ZONE_DMA) && defined(CONFIG_UBICOM32_OCM_FOR_SKB))
+static inline struct sk_buff *ubi32_alloc_skb_ocm(struct net_device *dev, unsigned int length)
+{
+	return __dev_alloc_skb(length, GFP_ATOMIC | __GFP_NOWARN | __GFP_NORETRY | GFP_DMA);
+}
+#endif
+
+static inline struct sk_buff *ubi32_alloc_skb(struct net_device *dev, unsigned int length)
+{
+	return __dev_alloc_skb(length, GFP_ATOMIC | __GFP_NOWARN);
+}
+
+static void ubi32_eth_vp_rxtx_enable(struct net_device *dev)
+{
+	struct ubi32_eth_private *priv = netdev_priv(dev);
+	priv->regs->command = UBI32_ETH_VP_CMD_RX_ENABLE | UBI32_ETH_VP_CMD_TX_ENABLE;
+	priv->regs->int_mask = (UBI32_ETH_VP_INT_RX | UBI32_ETH_VP_INT_TX);
+	ubicom32_set_interrupt(priv->vp_int_bit);
+}
+
+static void ubi32_eth_vp_rxtx_stop(struct net_device *dev)
+{
+	struct ubi32_eth_private *priv = netdev_priv(dev);
+	priv->regs->command = 0;
+	priv->regs->int_mask = 0;
+	ubicom32_set_interrupt(priv->vp_int_bit);
+
+	/* Wait for graceful shutdown */
+	while (priv->regs->status & (UBI32_ETH_VP_STATUS_RX_STATE | UBI32_ETH_VP_STATUS_TX_STATE));
+}
+
+/*
+ * ubi32_eth_tx_done()
+ */
+static int ubi32_eth_tx_done(struct net_device *dev)
+{
+	struct ubi32_eth_private *priv;
+	struct sk_buff *skb;
+	volatile void *pdata;
+	struct ubi32_eth_dma_desc *desc;
+	u32_t 	count = 0;
+
+	priv = netdev_priv(dev);
+
+	priv->regs->int_status &= ~UBI32_ETH_VP_INT_TX;
+	while (priv->tx_tail != priv->regs->tx_out) {
+		pdata = priv->regs->tx_dma_ring[priv->tx_tail];
+		BUG_ON(pdata == NULL);
+
+		skb = container_of((void *)pdata, struct sk_buff, cb);
+		desc = (struct ubi32_eth_dma_desc *)pdata;
+		if (unlikely(!(desc->status & UBI32_ETH_VP_TX_OK))) {
+			dev->stats.tx_errors++;
+		} else {
+			dev->stats.tx_packets++;
+			dev->stats.tx_bytes += skb->len;
+		}
+		dev_kfree_skb_any(skb);
+		priv->regs->tx_dma_ring[priv->tx_tail] = NULL;
+		priv->tx_tail = (priv->tx_tail + 1) & TX_DMA_RING_MASK;
+		count++;
+	}
+
+	if (unlikely(priv->regs->status & UBI32_ETH_VP_STATUS_TX_Q_FULL)) {
+		spin_lock(&priv->lock);
+		if (priv->regs->status & UBI32_ETH_VP_STATUS_TX_Q_FULL) {
+			priv->regs->status &= ~UBI32_ETH_VP_STATUS_TX_Q_FULL;
+			netif_wake_queue(dev);
+		}
+		spin_unlock(&priv->lock);
+	}
+	return count;
+}
+
+/*
+ * ubi32_eth_receive()
+ *	To avoid locking overhead, this is called only
+ *	by tasklet when not using NAPI, or
+ *	by NAPI poll when using NAPI.
+ *	return number of frames processed
+ */
+static int ubi32_eth_receive(struct net_device *dev, int quota)
+{
+	struct ubi32_eth_private *priv = netdev_priv(dev);
+	unsigned short rx_in = priv->regs->rx_in;
+	struct sk_buff *skb;
+	struct ubi32_eth_dma_desc *desc = NULL;
+	volatile void *pdata;
+
+	int extra_reserve_adj;
+	int extra_alloc = UBI32_ETH_RESERVE_SPACE + UBI32_ETH_TRASHED_MEMORY;
+	int replenish_cnt, count = 0;
+	int replenish_max = RX_DMA_MAX_QUEUE_SIZE;
+#if (defined(CONFIG_ZONE_DMA) && defined(CONFIG_UBICOM32_OCM_FOR_SKB))
+	if (likely(dev == ubi32_eth_devices[0]))
+		replenish_max = min(ubi32_ocm_skbuf_max, RX_DMA_MAX_QUEUE_SIZE);;
+#endif
+
+	if (unlikely(rx_in == priv->regs->rx_out))
+		priv->vp_stats.rx_q_full_cnt++;
+
+	priv->regs->int_status &= ~UBI32_ETH_VP_INT_RX;
+	while (priv->rx_tail != priv->regs->rx_out) {
+		if (unlikely(count == quota)) {
+			/* There is still frame pending to be processed */
+			priv->vp_stats.rx_throttle++;
+			break;
+		}
+
+		pdata = priv->regs->rx_dma_ring[priv->rx_tail];
+		BUG_ON(pdata == NULL);
+
+		desc = (struct ubi32_eth_dma_desc *)pdata;
+		skb = container_of((void *)pdata, struct sk_buff, cb);
+		count++;
+		priv->regs->rx_dma_ring[priv->rx_tail] = NULL;
+		priv->rx_tail = ((priv->rx_tail + 1) & RX_DMA_RING_MASK);
+
+		/*
+		 * Check only RX_OK bit here.
+		 * The rest of status word is used as timestamp
+		 */
+		if (unlikely(!(desc->status & UBI32_ETH_VP_RX_OK))) {
+			dev->stats.rx_errors++;
+			dev_kfree_skb_any(skb);
+			continue;
+		}
+
+		skb_put(skb, desc->data_len);
+		skb->dev = dev;
+		skb->protocol = eth_type_trans(skb, dev);
+		skb->ip_summed = CHECKSUM_NONE;
+		dev->stats.rx_bytes += skb->len;
+		dev->stats.rx_packets++;
+#ifndef UBICOM32_USE_NAPI
+		netif_rx(skb);
+#else
+		netif_receive_skb(skb);
+#endif
+	}
+
+	/* fill in more descripor for VP*/
+	replenish_cnt =  replenish_max -
+		((RX_DMA_RING_SIZE + rx_in - priv->rx_tail) & RX_DMA_RING_MASK);
+	if (replenish_cnt > 0) {
+#if (defined(CONFIG_ZONE_DMA) && defined(CONFIG_UBICOM32_OCM_FOR_SKB))
+		/*
+		 * black magic for perforamnce:
+		 *   Try to allocate skb from OCM only for first Ethernet I/F.
+		 *   Also limit number of RX buffers to 21 due to limited OCM.
+		 */
+		if (likely(dev == ubi32_eth_devices[0])) {
+			do {
+				skb = ubi32_alloc_skb_ocm(dev, RX_BUF_SIZE + extra_alloc);
+				if (!skb) {
+					break;
+				}
+				/* set up dma descriptor */
+				ubi32_ocm_skbuf++;
+				desc = (struct ubi32_eth_dma_desc *)skb->cb;
+				extra_reserve_adj =
+					((u32)skb->data + UBI32_ETH_RESERVE_SPACE + ETH_HLEN) &
+					(CACHE_LINE_SIZE - 1);
+				skb_reserve(skb, UBI32_ETH_RESERVE_SPACE - extra_reserve_adj);
+				desc->data_pointer = skb->data;
+				desc->buffer_len = RX_BUF_SIZE + UBI32_ETH_TRASHED_MEMORY;
+				desc->data_len = 0;
+				desc->status = 0;
+				priv->regs->rx_dma_ring[rx_in] = desc;
+				rx_in = (rx_in + 1) & RX_DMA_RING_MASK;
+			} while (--replenish_cnt > 0);
+		}
+#endif
+
+		while (replenish_cnt-- > 0) {
+			skb = ubi32_alloc_skb(dev, RX_BUF_SIZE + extra_alloc);
+			if (!skb) {
+				priv->vp_stats.rx_alloc_err++;
+				break;
+			}
+			/* set up dma descriptor */
+			ubi32_ddr_skbuf++;
+			desc = (struct ubi32_eth_dma_desc *)skb->cb;
+			extra_reserve_adj =
+				((u32)skb->data + UBI32_ETH_RESERVE_SPACE + ETH_HLEN) &
+				(CACHE_LINE_SIZE - 1);
+			skb_reserve(skb, UBI32_ETH_RESERVE_SPACE - extra_reserve_adj);
+			desc->data_pointer = skb->data;
+			desc->buffer_len = RX_BUF_SIZE + UBI32_ETH_TRASHED_MEMORY;
+			desc->data_len = 0;
+			desc->status = 0;
+			priv->regs->rx_dma_ring[rx_in] = desc;
+			rx_in = (rx_in + 1) & RX_DMA_RING_MASK;
+		}
+
+		wmb();
+		priv->regs->rx_in = rx_in;
+		ubicom32_set_interrupt(priv->vp_int_bit);
+	}
+
+	if (likely(count > 0)) {
+		dev->last_rx = jiffies;
+	}
+	return count;
+}
+
+#ifdef UBICOM32_USE_NAPI
+static int ubi32_eth_napi_poll(struct napi_struct *napi, int budget)
+{
+	struct ubi32_eth_private *priv = container_of(napi, struct ubi32_eth_private, napi);
+	struct net_device *dev = priv->dev;
+	u32_t count;
+
+	if (priv->tx_tail != priv->regs->tx_out) {
+                ubi32_eth_tx_done(dev);
+        }
+
+	count = ubi32_eth_receive(dev, budget);
+
+	if (count < budget) {
+		napi_complete(napi);
+		priv->regs->int_mask |= (UBI32_ETH_VP_INT_RX | UBI32_ETH_VP_INT_TX);
+		if ((priv->rx_tail != priv->regs->rx_out) || (priv->tx_tail != priv->regs->tx_out)) {
+			if (napi_reschedule(napi)) {
+				priv->regs->int_mask = 0;
+			}
+		}
+	}
+	return count;
+}
+
+#else
+static void ubi32_eth_do_tasklet(unsigned long arg)
+{
+	struct net_device *dev = (struct net_device *)arg;
+	struct ubi32_eth_private *priv = netdev_priv(dev);
+
+	if (priv->tx_tail != priv->regs->tx_out) {
+		ubi32_eth_tx_done(dev);
+	}
+
+	/* always call receive to process new RX frame as well as replenish RX buffers */
+	ubi32_eth_receive(dev, UBI32_RX_BOUND);
+
+	priv->regs->int_mask |= (UBI32_ETH_VP_INT_RX | UBI32_ETH_VP_INT_TX);
+	if ((priv->rx_tail != priv->regs->rx_out) || (priv->tx_tail != priv->regs->tx_out)) {
+		priv->regs->int_mask = 0;
+		tasklet_schedule(&priv->tsk);
+	}
+}
+#endif
+
+#if defined(UBICOM32_USE_POLLING)
+static struct timer_list eth_poll_timer;
+
+static void ubi32_eth_poll(unsigned long arg)
+{
+	struct net_device *dev;
+	struct ubi32_eth_private *priv;
+	int i;
+
+	for (i = 0; i < UBI32_ETH_NUM_OF_DEVICES; i++) {
+		dev = ubi32_eth_devices[i];
+		if (dev && (dev->flags & IFF_UP)) {
+			priv = netdev_priv(dev);
+#ifdef UBICOM32_USE_NAPI
+			napi_schedule(&priv->napi);
+#else
+			tasklet_schedule(&priv->tsk);
+#endif
+		}
+	}
+
+	eth_poll_timer.expires = jiffies + 2;
+	add_timer(&eth_poll_timer);
+}
+
+#else
+static irqreturn_t ubi32_eth_interrupt(int irq, void *dev_id)
+{
+	struct ubi32_eth_private *priv;
+
+	struct net_device *dev = (struct net_device *)dev_id;
+	BUG_ON(irq != dev->irq);
+
+	priv = netdev_priv(dev);
+	if (unlikely(!(priv->regs->int_status & priv->regs->int_mask))) {
+		return IRQ_NONE;
+	}
+
+	/*
+	 * Disable port interrupt
+	 */
+#ifdef UBICOM32_USE_NAPI
+	if (napi_schedule_prep(&priv->napi)) {
+		priv->regs->int_mask = 0;
+		__napi_schedule(&priv->napi);
+	}
+#else
+	priv->regs->int_mask = 0;
+	tasklet_schedule(&priv->tsk);
+#endif
+	return IRQ_HANDLED;
+}
+#endif
+
+/*
+ * ubi32_eth_open
+ */
+static int ubi32_eth_open(struct net_device *dev)
+{
+	struct ubi32_eth_private *priv = netdev_priv(dev);
+	int err;
+
+	printk(KERN_INFO "eth open %s\n",dev->name);
+#ifndef UBICOM32_USE_POLLING
+	/* request_region() */
+	err = request_irq(dev->irq, ubi32_eth_interrupt, IRQF_DISABLED, dev->name, dev);
+	if (err) {
+		printk(KERN_WARNING "fail to request_irq %d\n",err);
+		 return -ENODEV;
+	}
+#endif
+#ifdef  UBICOM32_USE_NAPI
+	napi_enable(&priv->napi);
+#else
+	tasklet_init(&priv->tsk, ubi32_eth_do_tasklet, (unsigned long)dev);
+#endif
+
+	/* call receive to supply RX buffers */
+	ubi32_eth_receive(dev, RX_DMA_MAX_QUEUE_SIZE);
+
+	/* check phy status and call netif_carrier_on */
+	ubi32_eth_vp_rxtx_enable(dev);
+	netif_start_queue(dev);
+	return 0;
+}
+
+static int ubi32_eth_close(struct net_device *dev)
+{
+	struct ubi32_eth_private *priv = netdev_priv(dev);
+	volatile void *pdata;
+	struct sk_buff *skb;
+
+#ifndef UBICOM32_USE_POLLING
+	free_irq(dev->irq, dev);
+#endif
+	netif_stop_queue(dev); /* can't transmit any more */
+#ifdef UBICOM32_USE_NAPI
+	napi_disable(&priv->napi);
+#else
+	tasklet_kill(&priv->tsk);
+#endif
+	ubi32_eth_vp_rxtx_stop(dev);
+
+	/*
+	 * RX clean up
+	 */
+	while (priv->rx_tail != priv->regs->rx_in) {
+		pdata = priv->regs->rx_dma_ring[priv->rx_tail];
+		skb = container_of((void *)pdata, struct sk_buff, cb);
+		priv->regs->rx_dma_ring[priv->rx_tail] = NULL;
+		dev_kfree_skb_any(skb);
+		priv->rx_tail = ((priv->rx_tail + 1) & RX_DMA_RING_MASK);
+	}
+	priv->regs->rx_in = 0;
+	priv->regs->rx_out = priv->regs->rx_in;
+	priv->rx_tail = priv->regs->rx_in;
+
+	/*
+	 * TX clean up
+	 */
+	BUG_ON(priv->regs->tx_out != priv->regs->tx_in);
+	ubi32_eth_tx_done(dev);
+	BUG_ON(priv->tx_tail != priv->regs->tx_in);
+	priv->regs->tx_in = 0;
+	priv->regs->tx_out = priv->regs->tx_in;
+	priv->tx_tail = priv->regs->tx_in;
+
+	return 0;
+}
+
+/*
+ * ubi32_eth_set_config
+ */
+static int ubi32_eth_set_config(struct net_device *dev, struct ifmap *map)
+{
+	/* if must to down to config it */
+	printk(KERN_INFO "set_config %x\n", dev->flags);
+	if (dev->flags & IFF_UP)
+		return -EBUSY;
+
+	/* I/O and IRQ can not be changed */
+	if (map->base_addr != dev->base_addr) {
+		printk(KERN_WARNING "%s: Can't change I/O address\n", dev->name);
+		return -EOPNOTSUPP;
+	}
+
+#ifndef UBICOM32_USE_POLLING
+	if (map->irq != dev->irq) {
+		printk(KERN_WARNING "%s: Can't change IRQ\n", dev->name);
+		return -EOPNOTSUPP;
+	}
+#endif
+
+	/* ignore other fields */
+	return 0;
+}
+
+static int ubi32_eth_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct ubi32_eth_private *priv = netdev_priv(dev);
+	struct ubi32_eth_dma_desc *desc = NULL;
+	unsigned short space, tx_in;
+
+	tx_in = priv->regs->tx_in;
+
+	dev->trans_start = jiffies; /* save the timestamp */
+	space = TX_DMA_RING_MASK - ((TX_DMA_RING_SIZE + tx_in - priv->tx_tail) & TX_DMA_RING_MASK);
+
+	if (unlikely(space == 0)) {
+		if (!(priv->regs->status & UBI32_ETH_VP_STATUS_TX_Q_FULL)) {
+			spin_lock(&priv->lock);
+			if (!(priv->regs->status & UBI32_ETH_VP_STATUS_TX_Q_FULL)) {
+				priv->regs->status |= UBI32_ETH_VP_STATUS_TX_Q_FULL;
+				priv->vp_stats.tx_q_full_cnt++;
+				netif_stop_queue(dev);
+			}
+			spin_unlock(&priv->lock);
+		}
+
+		/* give both HW and this driver an extra trigger */
+		priv->regs->int_mask |= UBI32_ETH_VP_INT_TX;
+#ifndef UBICOM32_USE_POLLING
+		ubicom32_set_interrupt(dev->irq);
+#endif
+		ubicom32_set_interrupt(priv->vp_int_bit);
+
+		return NETDEV_TX_BUSY;
+	}
+
+	/*still have room */
+	desc = (struct ubi32_eth_dma_desc *)skb->cb;
+	desc->data_pointer = skb->data;
+	desc->data_len = skb->len;
+	priv->regs->tx_dma_ring[tx_in] = desc;
+	tx_in = ((tx_in + 1) & TX_DMA_RING_MASK);
+	wmb();
+	priv->regs->tx_in = tx_in;
+	/* kick the HRT */
+	ubicom32_set_interrupt(priv->vp_int_bit);
+
+	return NETDEV_TX_OK;
+}
+
+/*
+ * Deal with a transmit timeout.
+ */
+static void ubi32_eth_tx_timeout (struct net_device *dev)
+{
+	struct ubi32_eth_private *priv = netdev_priv(dev);
+	dev->stats.tx_errors++;
+	priv->regs->int_mask |= UBI32_ETH_VP_INT_TX;
+#ifndef UBICOM32_USE_POLLING
+	ubicom32_set_interrupt(dev->irq);
+#endif
+	ubicom32_set_interrupt(priv->vp_int_bit);
+}
+
+static int ubi32_eth_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct ubi32_eth_private *priv = netdev_priv(dev);
+	struct mii_ioctl_data *data = if_mii(rq);
+
+	printk(KERN_INFO "ioctl %s, %d\n", dev->name, cmd);
+	switch (cmd) {
+	case SIOCGMIIPHY:
+		data->phy_id = 0;
+		break;
+
+	case SIOCGMIIREG:
+		if ((data->reg_num & 0x1F) == MII_BMCR) {
+			/* Make up MII control register value from what we know */
+			data->val_out = 0x0000
+			| ((priv->regs->status & UBI32_ETH_VP_STATUS_DUPLEX)
+					? BMCR_FULLDPLX : 0)
+			| ((priv->regs->status & UBI32_ETH_VP_STATUS_SPEED100)
+					? BMCR_SPEED100 : 0)
+			| ((priv->regs->status & UBI32_ETH_VP_STATUS_SPEED1000)
+					? BMCR_SPEED1000 : 0);
+		} else if ((data->reg_num & 0x1F) == MII_BMSR) {
+			/* Make up MII status register value from what we know */
+			data->val_out =
+			(BMSR_100FULL|BMSR_100HALF|BMSR_10FULL|BMSR_10HALF)
+			| ((priv->regs->status & UBI32_ETH_VP_STATUS_LINK)
+					? BMSR_LSTATUS : 0);
+		} else {
+			return -EIO;
+		}
+		break;
+
+	case SIOCSMIIREG:
+		return -EOPNOTSUPP;
+		break;
+
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+/*
+ * Return statistics to the caller
+ */
+static struct net_device_stats *ubi32_eth_get_stats(struct net_device *dev)
+{
+	return &dev->stats;
+}
+
+
+static int ubi32_eth_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct ubi32_eth_private *priv = netdev_priv(dev);
+	unsigned long flags;
+
+	if ((new_mtu < 68) || (new_mtu > 1500))
+		return -EINVAL;
+
+	spin_lock_irqsave(&priv->lock, flags);
+	dev->mtu = new_mtu;
+	spin_unlock_irqrestore(&priv->lock, flags);
+	printk(KERN_INFO "set mtu to %d", new_mtu);
+	return 0;
+}
+
+/*
+ * ubi32_eth_cleanup: unload the module
+ */
+void ubi32_eth_cleanup(void)
+{
+	struct ubi32_eth_private *priv;
+	struct net_device *dev;
+	int i;
+
+	for (i = 0; i < UBI32_ETH_NUM_OF_DEVICES; i++) {
+		dev = ubi32_eth_devices[i];
+		if (dev) {
+			priv = netdev_priv(dev);
+			kfree(priv->regs->tx_dma_ring);
+			unregister_netdev(dev);
+			free_netdev(dev);
+			ubi32_eth_devices[i] = NULL;
+		}
+	}
+}
+
+int ubi32_eth_init_module(void)
+{
+	struct ethtionode *eth_node;
+	struct net_device *dev;
+	struct ubi32_eth_private *priv;
+	int i, err;
+
+	/*
+	 * Device allocation.
+	 */
+	err = 0;
+	for (i = 0; i < UBI32_ETH_NUM_OF_DEVICES; i++) {
+		/*
+		 * See if the eth_vp is in the device tree.
+		 */
+		eth_node = (struct ethtionode *)devtree_find_node(eth_if_name[i]);
+		if (!eth_node) {
+			printk(KERN_INFO "%s does not exist\n", eth_if_name[i]);
+			continue;
+		}
+
+		eth_node->tx_dma_ring = (struct ubi32_eth_dma_desc **)kmalloc(
+				sizeof(struct ubi32_eth_dma_desc *) *
+				(TX_DMA_RING_SIZE + RX_DMA_RING_SIZE),
+				GFP_ATOMIC | __GFP_NOWARN | __GFP_NORETRY | GFP_DMA);
+
+		if (eth_node->tx_dma_ring == NULL) {
+			eth_node->tx_dma_ring = (struct ubi32_eth_dma_desc **)kmalloc(
+				sizeof(struct ubi32_eth_dma_desc *) *
+				(TX_DMA_RING_SIZE + RX_DMA_RING_SIZE), GFP_KERNEL);
+			printk(KERN_INFO "fail to allocate from OCM\n");
+		}
+
+		if (!eth_node->tx_dma_ring) {
+			err = -ENOMEM;
+			break;
+		}
+		eth_node->rx_dma_ring = eth_node->tx_dma_ring + TX_DMA_RING_SIZE;
+		eth_node->tx_sz = TX_DMA_RING_SIZE - 1;
+		eth_node->rx_sz = RX_DMA_RING_SIZE - 1;
+
+		dev = alloc_etherdev(sizeof(struct ubi32_eth_private));
+		if (!dev) {
+			kfree(eth_node->tx_dma_ring);
+			err = -ENOMEM;
+			break;
+		}
+		priv = netdev_priv(dev);
+		priv->dev = dev;
+
+		/*
+		 * This just fill in some default Ubicom MAC address
+		 */
+		memcpy(dev->dev_addr, mac_addr[i], ETH_ALEN);
+		memset(dev->broadcast, 0xff, ETH_ALEN);
+
+		priv->regs = eth_node;
+		priv->regs->command = 0;
+		priv->regs->int_mask = 0;
+		priv->regs->int_status = 0;
+		priv->regs->tx_out = 0;
+		priv->regs->rx_out = 0;
+		priv->regs->tx_in = 0;
+		priv->regs->rx_in = 0;
+		priv->rx_tail = 0;
+		priv->tx_tail = 0;
+
+		priv->vp_int_bit = eth_node->dn.sendirq;
+		dev->irq = eth_node->dn.recvirq;
+
+		spin_lock_init(&priv->lock);
+
+		dev->open		= ubi32_eth_open;
+		dev->stop		= ubi32_eth_close;
+		dev->hard_start_xmit	= ubi32_eth_start_xmit;
+		dev->tx_timeout		= ubi32_eth_tx_timeout;
+		dev->watchdog_timeo	= UBI32_ETH_VP_TX_TIMEOUT;
+
+		dev->set_config		= ubi32_eth_set_config;
+		dev->do_ioctl		= ubi32_eth_ioctl;
+		dev->get_stats		= ubi32_eth_get_stats;
+		dev->change_mtu		= ubi32_eth_change_mtu;
+#ifdef UBICOM32_USE_NAPI
+		netif_napi_add(dev, &priv->napi, ubi32_eth_napi_poll, UBI32_ETH_NAPI_WEIGHT);
+#endif
+		err = register_netdev(dev);
+		if (err) {
+			printk(KERN_WARNING "Failed to register netdev %s\n", eth_if_name[i]);
+			//release_region();
+			free_netdev(dev);
+			kfree(eth_node->tx_dma_ring);
+			break;
+		}
+
+		ubi32_eth_devices[i] = dev;
+		printk(KERN_INFO "%s vp_base:0x%p, tio_int:%d irq:%d feature:0x%lx\n",
+			dev->name, priv->regs, eth_node->dn.sendirq, dev->irq, dev->features);
+	}
+
+	if (err) {
+		ubi32_eth_cleanup();
+		return err;
+	}
+
+	if (!ubi32_eth_devices[0] && !ubi32_eth_devices[1]) {
+		return -ENODEV;
+	}
+
+#if defined(UBICOM32_USE_POLLING)
+	init_timer(&eth_poll_timer);
+	eth_poll_timer.function = ubi32_eth_poll;
+	eth_poll_timer.data = (unsigned long)0;
+	eth_poll_timer.expires = jiffies + 2;
+	add_timer(&eth_poll_timer);
+#endif
+
+	return 0;
+}
+
+module_init(ubi32_eth_init_module);
+module_exit(ubi32_eth_cleanup);
+
+MODULE_AUTHOR("Kan Yan, Greg Ren");
+MODULE_LICENSE("GPL");

target/linux/ubicom32/files/drivers/net/ubi32-eth.h

@@ -0,0 +1,132 @@
+/*
+ * drivers/net/ubi32-eth.h
+ *   Ubicom32 ethernet TIO interface driver definitions.
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+#ifndef _UBI32_ETH_H
+#define _UBI32_ETH_H
+
+#include <asm/devtree.h>
+
+#define UBI32_ETH_NUM_OF_DEVICES 2
+
+/*
+ * Number of bytes trashed beyond the packet data.
+ */
+#define UBI32_ETH_TRASHED_MEMORY	(CACHE_LINE_SIZE + ETH_HLEN - 1)
+
+/*
+ * Linux already reserves NET_SKB_PAD bytes of headroom in each sk_buff.
+ * We want to be able to reserve at least one cache line to align Ethernet
+ * and IP header to cache line.
+ * Note that the TIO expects a CACHE_LINE_SIZE - ETH_HLEN aligned Ethernet
+ * header, while satisfies NET_IP_ALIGN (= 2) automatically.
+ * (NET_SKB_PAD is 16, NET_IP_ALIGN is 2, CACHE_LINE_SIZE is 32).
+ * You can add more space by making UBI32_ETH_RESERVE_EXTRA != 0.
+ */
+#define UBI32_ETH_RESERVE_EXTRA (1 * CACHE_LINE_SIZE)
+#define UBI32_ETH_RESERVE_SPACE	(UBI32_ETH_RESERVE_EXTRA + CACHE_LINE_SIZE)
+
+struct ubi32_eth_dma_desc {
+	volatile void 	*data_pointer;	/* pointer to the buffer */
+	volatile u16 	buffer_len;	/* the buffer size */
+	volatile u16	data_len;	/* actual frame length */
+	volatile u32	status;		/* bit0: status to be update by VP; bit[31:1] time stamp */
+};
+
+#define TX_DMA_RING_SIZE (1<<8)
+#define TX_DMA_RING_MASK (TX_DMA_RING_SIZE - 1)
+#define RX_DMA_RING_SIZE (1<<8)
+#define RX_DMA_RING_MASK (RX_DMA_RING_SIZE - 1)
+
+#define RX_DMA_MAX_QUEUE_SIZE (RX_DMA_RING_SIZE - 1)	/* no more than (RX_DMA_RING_SIZE - 1) */
+#define RX_MAX_PKT_SIZE (ETH_DATA_LEN + ETH_HLEN + VLAN_HLEN)
+#define RX_MIN_PKT_SIZE	ETH_ZLEN
+#define RX_BUF_SIZE (RX_MAX_PKT_SIZE + VLAN_HLEN)	/* allow double VLAN tag */
+
+#define UBI32_ETH_VP_TX_TIMEOUT (10*HZ)
+
+struct ubi32_eth_vp_stats {
+	u32	rx_alloc_err;
+	u32	tx_q_full_cnt;
+	u32	rx_q_full_cnt;
+	u32	rx_throttle;
+};
+
+struct ubi32_eth_private {
+	struct net_device *dev;
+	struct ubi32_eth_vp_stats vp_stats;
+	spinlock_t lock;
+#ifdef UBICOM32_USE_NAPI
+	struct napi_struct napi;
+#else
+	struct tasklet_struct tsk;
+#endif
+	struct ethtionode *regs;
+	u16	rx_tail;
+	u16	tx_tail;
+	u32	vp_int_bit;
+};
+
+struct ethtionode {
+	struct devtree_node dn;
+	volatile u16	command;
+	volatile u16	status;
+	volatile u16	int_mask;	/* interrupt mask */
+	volatile u16	int_status;	/* interrupt mask */
+	volatile u16	tx_in;		/* owned by driver */
+	volatile u16	tx_out;		/* owned by vp */
+	volatile u16	rx_in;		/* owned by driver */
+	volatile u16	rx_out;		/* owned by vp */
+	u16		tx_sz;		/* owned by driver */
+	u16		rx_sz;		/* owned by driver */
+	struct ubi32_eth_dma_desc **tx_dma_ring;
+	struct ubi32_eth_dma_desc **rx_dma_ring;
+};
+
+#define UBI32_ETH_VP_STATUS_LINK	(1<<0)
+#define UBI32_ETH_VP_STATUS_SPEED100	(0x1<<1)
+#define UBI32_ETH_VP_STATUS_SPEED1000	(0x1<<2)
+#define UBI32_ETH_VP_STATUS_DUPLEX	(0x1<<3)
+#define UBI32_ETH_VP_STATUS_FLOW_CTRL	(0x1<<4)
+
+#define UBI32_ETH_VP_STATUS_RX_STATE	(0x1<<5)
+#define UBI32_ETH_VP_STATUS_TX_STATE	(0x1<<6)
+
+#define UBI32_ETH_VP_STATUS_TX_Q_FULL	(1<<8)
+
+#define UBI32_ETH_VP_INT_RX	(1<<0)
+#define UBI32_ETH_VP_INT_TX	(1<<1)
+
+#define UBI32_ETH_VP_CMD_RX_ENABLE	(1<<0)
+#define UBI32_ETH_VP_CMD_TX_ENABLE	(1<<1)
+
+#define UBI32_ETH_VP_RX_OK		(1<<0)
+#define UBI32_ETH_VP_TX_OK		(1<<1)
+
+#define UBI32_TX_BOUND		TX_DMA_RING_SIZE
+#define UBI32_RX_BOUND		64
+#define UBI32_ETH_NAPI_WEIGHT	64		/* for GigE */
+#endif

target/linux/ubicom32/files/drivers/serial/ubi32_mailbox.c

@@ -0,0 +1,928 @@
+/*
+ * drivers/serial/ubi32_mailbox.c
+ *   Ubicom32 On-Chip Mailbox Driver
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/sysrq.h>
+#include <linux/platform_device.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial_core.h>
+
+#include <asm/ip5000.h>
+
+#define SERIAL_UBICOM_BAUDRATE	115200
+#define SERIAL_UBICOM_DATA_BIT	8	/* Fixed parameter - do not change */
+#define SERIAL_UBICOM_PAR_BIT	0	/* Fixed parameter - do not change */
+#define SERIAL_UBICOM_STOP_BIT	1	/* Fixed parameter - do not change */
+
+/* UART name and device definitions */
+#define UBI32_MAILBOX_NAME	"ttyUM" // XXX
+#define UBI32_MAILBOX_MAJOR	207 // XXX
+#define UBI32_MAILBOX_MINOR	64
+
+#define PORT_UBI32_MAILBOX	1235
+#define NR_PORTS 1
+
+#define get_sclk() 0
+
+struct ubi32_mailbox_port {
+	struct uart_port port;
+	/*
+	 * NOTE (rkeller):
+	 * the uart port is wrapped in another structure in case we need to hold more state than
+	 * what we can hold in the uart_port.
+	 * Not sure if we need this, I took over the concept from the blackfin driver.
+	 */
+} ubi32_mailbox_ports[NR_PORTS];
+
+struct ubi32_mailbox_resource {
+	int uart_base_addr;
+	int uart_irq;
+} ubi32_mailbox_resource[NR_PORTS] = {
+	/*
+	 * uart_base_addr has to be non-NULL because it is put in the uart_port membase.
+	 * If membase if null the kernel skips the configuration and our port_type never gets set.
+	 */
+	{ISD_MAILBOX_BASE, ISD_MAILBOX_INT}
+};
+
+static volatile struct ubicom32_isd_mailbox {
+	volatile u32_t in;
+	volatile u32_t out;
+	volatile u32_t status;
+} *ubi32_mailbox = (struct ubicom32_isd_mailbox *)ISD_MAILBOX_BASE;
+
+static void ubi32_mailbox_tx_chars(struct ubi32_mailbox_port *uart);
+
+static void ubi32_mailbox_mctrl_check(struct ubi32_mailbox_port *uart);
+
+#define TRUE 1
+#define FALSE 0
+
+static int mailbox_console_flg = TRUE;
+static int num_timeouts = 0;
+
+/*
+ * dummy functions and defined to be able to compile the Blackfin code
+ */
+#define UART_GET_LSR(port) (1)
+#define UART_PUT_LSR(port, bits)
+#define UART_CLEAR_LSR(port) (1)
+#define TEMT 1
+#define TFI 1
+#define BI 1
+#define PE 1
+#define OE 1
+#define FE 1
+#define THRE 1
+#define DR 1
+#define UART_GET_LCR(port) (1)
+#define UART_PUT_LCR(port, bits)
+#define SB 1
+#define STB 1
+#define PEN 1
+#define EPS 1
+#define STP 1
+#define WLS(n) 0
+#define UART_GET_IER(port) (1)
+#define UART_SET_IER(port, bits)
+#define UART_CLEAR_IER(port, bits)
+#define ETBEI 0
+#define ERBFI 0
+#define UART_GET_CHAR(port) ubi32_mailbox_get_char()
+#define UART_PUT_CHAR(port, ch) ubi32_mailbox_put_char(ch)
+#define SSYNC()
+#define UART_GET_DLL(port) 0
+#define UART_PUT_DLL(port, ch)
+#define UART_GET_DLH(port) 0
+#define UART_PUT_DLH(port, ch)
+#define UART_GET_GCTL(port) (0)
+#define UART_PUT_GCTL(port, ch)
+#define UCEN 1
+
+/*
+ * ubi32_mailbox_get_char_avail()
+ */
+static int ubi32_mailbox_get_char_avail(void)
+{
+	return !(ubi32_mailbox->status & ISD_MAILBOX_STATUS_IN_EMPTY);
+}
+
+/*
+ * ubi32_mailbox_get_char()
+ */
+static u32_t ubi32_mailbox_get_char(void)
+{
+	if (mailbox_console_flg == TRUE) {
+		/*
+		 * Mailbox console is connected.
+		 */
+		while (ubi32_mailbox->status & ISD_MAILBOX_STATUS_IN_EMPTY);
+		return ubi32_mailbox->in & 0xff;
+	}
+
+	/*
+	 * Mailbox console was not connected.
+	 */
+	if (ubi32_mailbox->status & ISD_MAILBOX_STATUS_IN_EMPTY) {
+		return 0xff;
+	}
+
+	/*
+	 * Mailbox console is connecting.
+	 */
+	mailbox_console_flg = TRUE;
+	num_timeouts = 0;
+	return ubi32_mailbox->in & 0xff;
+}
+
+#define MAILBOX_MAX_ATTEMPTS 1000000
+#define MAILBOX_MAX_TIMEOUTS 5
+/*
+ * ubi32_mailbox_put_char()
+ */
+static void ubi32_mailbox_put_char(u32_t v)
+{
+	/*
+	 * Wait to be able to output.
+	 */
+	u32_t num_attempts = 0;
+
+	if(mailbox_console_flg == TRUE) {
+		while(num_attempts++ < MAILBOX_MAX_ATTEMPTS) {
+			if(ubi32_mailbox->status & ISD_MAILBOX_STATUS_OUT_EMPTY) {
+				break;
+			}
+		}
+
+		/*
+		 * If timed out more than 5 times on send, mailbox console is disconnected now.
+		 */
+		if (num_attempts > MAILBOX_MAX_ATTEMPTS) {
+			if (num_timeouts++ > MAILBOX_MAX_TIMEOUTS) {
+				mailbox_console_flg = FALSE;
+			}
+		}
+	}
+
+	asm volatile(
+		"pipe_flush 0	\n\t"
+		"pipe_flush 0	\n\t"
+		"pipe_flush 0	\n\t"
+		"pipe_flush 0	\n\t"
+		"pipe_flush 0	\n\t"
+		"pipe_flush 0	\n\t"
+		"pipe_flush 0	\n\t"
+	);
+
+	ubi32_mailbox->out = v & 0xff;
+}
+
+static void ubi32_mailbox_hw_init(struct ubi32_mailbox_port *uart)
+{
+// NOTE: It does not do any good to do these here because we are running on the linux hardware thread,
+//	and these have to be called on the ldsr thread.
+//	ubicom32_clear_interrupt(ISD_MAILBOX_INT);
+//	ubicom32_enable_interrupt(ISD_MAILBOX_INT);
+}
+
+/*
+ * interrupts are disabled on entry
+ */
+static void ubi32_mailbox_stop_tx(struct uart_port *port)
+{
+//	struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port;
+//	struct circ_buf *xmit = &uart->port.info->xmit;
+
+	while (!(UART_GET_LSR(uart) & TEMT))
+		cpu_relax();
+
+	/* Clear TFI bit */
+	UART_PUT_LSR(uart, TFI);
+	UART_CLEAR_IER(uart, ETBEI);
+}
+
+/*
+ * port is locked and interrupts are disabled
+ */
+static void ubi32_mailbox_start_tx(struct uart_port *port)
+{
+	struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port;
+
+	UART_SET_IER(uart, ETBEI);
+
+	ubi32_mailbox_tx_chars(uart);
+}
+
+/*
+ * Interrupts are enabled
+ */
+static void ubi32_mailbox_stop_rx(struct uart_port *port)
+{
+//	struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port;
+	UART_CLEAR_IER(uart, ERBFI);
+}
+
+/*
+ * Set the modem control timer to fire immediately.
+ */
+static void ubi32_mailbox_enable_ms(struct uart_port *port)
+{
+}
+
+static void ubi32_mailbox_rx_chars(struct ubi32_mailbox_port *uart)
+{
+	struct uart_info *info = uart->port.info;
+	struct tty_struct *tty = info->port.tty;
+	unsigned int status, ch, flg;
+
+	status = 0; // XXX? UART_GET_LSR(uart);
+	UART_CLEAR_LSR(uart);
+
+	ch = UART_GET_CHAR(uart);
+
+	if(ch == 0xff)
+		return;
+
+	uart->port.icount.rx++;
+
+	if (status & BI) {
+		uart->port.icount.brk++;
+		if (uart_handle_break(&uart->port))
+			goto ignore_char;
+		status &= ~(PE | FE);
+	}
+	if (status & PE)
+		uart->port.icount.parity++;
+	if (status & OE)
+		uart->port.icount.overrun++;
+	if (status & FE)
+		uart->port.icount.frame++;
+
+	status &= uart->port.read_status_mask;
+
+	if (status & BI)
+		flg = TTY_BREAK;
+	else if (status & PE)
+		flg = TTY_PARITY;
+	else if (status & FE)
+		flg = TTY_FRAME;
+	else
+		flg = TTY_NORMAL;
+
+	if (uart_handle_sysrq_char(&uart->port, ch))
+		goto ignore_char;
+
+	uart_insert_char(&uart->port, status, OE, ch, flg);
+
+ ignore_char:
+	tty_flip_buffer_push(tty);
+}
+
+static void ubi32_mailbox_tx_chars(struct ubi32_mailbox_port *uart)
+{
+	struct circ_buf *xmit = &uart->port.info->xmit;
+
+	if (uart->port.x_char) {
+		UART_PUT_CHAR(uart, uart->port.x_char);
+		uart->port.icount.tx++;
+		uart->port.x_char = 0;
+	}
+	/*
+	 * Check the modem control lines before
+	 * transmitting anything.
+	 */
+	ubi32_mailbox_mctrl_check(uart);
+
+	if (uart_circ_empty(xmit) || uart_tx_stopped(&uart->port)) {
+		ubi32_mailbox_stop_tx(&uart->port);
+		return;
+	}
+
+	while ((UART_GET_LSR(uart) & THRE) && xmit->tail != xmit->head) {
+		UART_PUT_CHAR(uart, xmit->buf[xmit->tail]);
+		xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
+		uart->port.icount.tx++;
+		SSYNC();
+	}
+
+	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+		uart_write_wakeup(&uart->port);
+
+	if (uart_circ_empty(xmit))
+		ubi32_mailbox_stop_tx(&uart->port);
+}
+
+static irqreturn_t ubi32_mailbox_isr(int irq, void *dev_id)
+{
+	struct ubi32_mailbox_port *uart = dev_id;
+
+	spin_lock(&uart->port.lock);
+
+	//XXX?while (UART_GET_LSR(uart) & DR)
+
+	/*
+	 * RX process
+	 */
+	while (ubi32_mailbox_get_char_avail()) {
+		ubi32_mailbox_rx_chars(uart);
+	}
+
+#if 0
+	/*
+	 * TX process
+	 */
+	if (this_uart.tx_in == this_uart.tx_out) {
+		UBICOM32_IO_PORT(SERIAL_UBICOM_PORT)->int_mask &= ~IO_PORTX_INT_SERDES_TXBE;
+	} else if (UBICOM32_IO_PORT(SERIAL_UBICOM_PORT)->int_status & IO_PORTX_INT_SERDES_TXBE) {
+		uart_ubicom32_send(this_uart.tx_buf[this_uart.tx_out & (SERIAL_UBICOM_BUF_SIZE - 1)]);
+		this_uart.tx_out++;
+		UBICOM32_IO_PORT(SERIAL_UBICOM_PORT)->int_mask |= IO_PORTX_INT_SERDES_TXBE;
+	}
+#endif
+
+	spin_unlock(&uart->port.lock);
+
+	return IRQ_HANDLED;
+}
+#if 0
+static irqreturn_t ubi32_mailbox_tx_int(int irq, void *dev_id)
+{
+	struct ubi32_mailbox_port *uart = dev_id;
+
+	spin_lock(&uart->port.lock);
+	if (UART_GET_LSR(uart) & THRE)
+		ubi32_mailbox_tx_chars(uart);
+	spin_unlock(&uart->port.lock);
+
+	return IRQ_HANDLED;
+}
+#endif
+
+/*
+ * Return TIOCSER_TEMT when transmitter is not busy.
+ */
+static unsigned int ubi32_mailbox_tx_empty(struct uart_port *port)
+{
+//	struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port;
+	unsigned short lsr;
+
+	lsr = UART_GET_LSR(uart);
+	if (lsr & TEMT)
+		return TIOCSER_TEMT;
+	else
+		return 0;
+}
+
+static unsigned int ubi32_mailbox_get_mctrl(struct uart_port *port)
+{
+		return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+}
+
+static void ubi32_mailbox_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+}
+
+/*
+ * Handle any change of modem status signal since we were last called.
+ */
+static void ubi32_mailbox_mctrl_check(struct ubi32_mailbox_port *uart)
+{
+}
+
+/*
+ * Interrupts are always disabled.
+ */
+static void ubi32_mailbox_break_ctl(struct uart_port *port, int break_state)
+{
+//	struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port;
+	u16 lcr = UART_GET_LCR(uart);
+	if (break_state)
+		lcr |= SB;
+	else
+		lcr &= ~SB;
+	UART_PUT_LCR(uart, lcr);
+	SSYNC();
+}
+
+static int ubi32_mailbox_startup(struct uart_port *port)
+{
+	struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port;
+
+	if (request_irq(uart->port.irq, ubi32_mailbox_isr, IRQF_DISABLED,
+	     "UBI32_MAILBOX", uart)) {
+		printk(KERN_NOTICE "Unable to attach Ubicom32 SERDES interrupt\n");
+		return -EBUSY;
+	}
+
+	UART_SET_IER(uart, ERBFI);
+	return 0;
+}
+
+static void ubi32_mailbox_shutdown(struct uart_port *port)
+{
+	struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port;
+
+	free_irq(uart->port.irq, uart);
+}
+
+static void
+ubi32_mailbox_set_termios(struct uart_port *port, struct ktermios *termios,
+		   struct ktermios *old)
+{
+	struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port;
+	unsigned long flags;
+	unsigned int baud, quot;
+	unsigned short val, ier, lsr, lcr = 0;
+
+	switch (termios->c_cflag & CSIZE) {
+	case CS8:
+		lcr = WLS(8);
+		break;
+	case CS7:
+		lcr = WLS(7);
+		break;
+	case CS6:
+		lcr = WLS(6);
+		break;
+	case CS5:
+		lcr = WLS(5);
+		break;
+	default:
+		printk(KERN_ERR "%s: word lengh not supported\n",
+			__FUNCTION__);
+	}
+
+	if (termios->c_cflag & CSTOPB)
+		lcr |= STB;
+	if (termios->c_cflag & PARENB)
+		lcr |= PEN;
+	if (!(termios->c_cflag & PARODD))
+		lcr |= EPS;
+	if (termios->c_cflag & CMSPAR)
+		lcr |= STP;
+
+	port->read_status_mask = OE;
+	if (termios->c_iflag & INPCK)
+		port->read_status_mask |= (FE | PE);
+	if (termios->c_iflag & (BRKINT | PARMRK))
+		port->read_status_mask |= BI;
+
+	/*
+	 * Characters to ignore
+	 */
+	port->ignore_status_mask = 0;
+	if (termios->c_iflag & IGNPAR)
+		port->ignore_status_mask |= FE | PE;
+	if (termios->c_iflag & IGNBRK) {
+		port->ignore_status_mask |= BI;
+		/*
+		 * If we're ignoring parity and break indicators,
+		 * ignore overruns too (for real raw support).
+		 */
+		if (termios->c_iflag & IGNPAR)
+			port->ignore_status_mask |= OE;
+	}
+
+	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
+	quot = uart_get_divisor(port, baud);
+	spin_lock_irqsave(&uart->port.lock, flags);
+
+	do {
+		lsr = UART_GET_LSR(uart);
+	} while (!(lsr & TEMT));
+
+	/* Disable UART */
+	ier = UART_GET_IER(uart);
+	UART_CLEAR_IER(uart, 0xF);
+
+	UART_PUT_DLL(uart, quot & 0xFF);
+	SSYNC();
+	UART_PUT_DLH(uart, (quot >> 8) & 0xFF);
+	SSYNC();
+
+	UART_PUT_LCR(uart, lcr);
+
+	/* Enable UART */
+	UART_SET_IER(uart, ier);
+
+	val = UART_GET_GCTL(uart);
+	val |= UCEN;
+	UART_PUT_GCTL(uart, val);
+
+	spin_unlock_irqrestore(&uart->port.lock, flags);
+}
+
+static const char *ubi32_mailbox_type(struct uart_port *port)
+{
+	struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port;
+
+	return uart->port.type == PORT_UBI32_MAILBOX ? "UBI32_MAILBOX" : NULL;
+}
+
+/*
+ * Release the memory region(s) being used by 'port'.
+ */
+static void ubi32_mailbox_release_port(struct uart_port *port)
+{
+}
+
+/*
+ * Request the memory region(s) being used by 'port'.
+ */
+static int ubi32_mailbox_request_port(struct uart_port *port)
+{
+	return 0;
+}
+
+/*
+ * Configure/autoconfigure the port.
+ */
+static void ubi32_mailbox_config_port(struct uart_port *port, int flags)
+{
+	struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port;
+
+	if (flags & UART_CONFIG_TYPE && ubi32_mailbox_request_port(&uart->port) == 0)
+		uart->port.type = PORT_UBI32_MAILBOX;
+}
+
+/*
+ * Verify the new serial_struct (for TIOCSSERIAL).
+ * The only change we allow are to the flags and type, and
+ * even then only between PORT_UBI32_MAILBOX and PORT_UNKNOWN
+ */
+static int
+ubi32_mailbox_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+	return 0;
+}
+
+static struct uart_ops ubi32_mailbox_pops = {
+	.tx_empty	= ubi32_mailbox_tx_empty,
+	.set_mctrl	= ubi32_mailbox_set_mctrl,
+	.get_mctrl	= ubi32_mailbox_get_mctrl,
+	.stop_tx	= ubi32_mailbox_stop_tx,
+	.start_tx	= ubi32_mailbox_start_tx,
+	.stop_rx	= ubi32_mailbox_stop_rx,
+	.enable_ms	= ubi32_mailbox_enable_ms,
+	.break_ctl	= ubi32_mailbox_break_ctl,
+	.startup	= ubi32_mailbox_startup,
+	.shutdown	= ubi32_mailbox_shutdown,
+	.set_termios	= ubi32_mailbox_set_termios,
+	.type		= ubi32_mailbox_type,
+	.release_port	= ubi32_mailbox_release_port,
+	.request_port	= ubi32_mailbox_request_port,
+	.config_port	= ubi32_mailbox_config_port,
+	.verify_port	= ubi32_mailbox_verify_port,
+};
+
+static void __init ubi32_mailbox_init_ports(void)
+{
+	static int first = 1;
+	int i;
+
+	if (!first)
+		return;
+	first = 0;
+
+	for (i = 0; i < NR_PORTS; i++) {
+		ubi32_mailbox_ports[i].port.uartclk   = get_sclk();
+		ubi32_mailbox_ports[i].port.ops       = &ubi32_mailbox_pops;
+		ubi32_mailbox_ports[i].port.line      = i;
+		ubi32_mailbox_ports[i].port.iotype    = UPIO_MEM;
+		ubi32_mailbox_ports[i].port.membase   =
+			(void __iomem *)ubi32_mailbox_resource[i].uart_base_addr;
+		ubi32_mailbox_ports[i].port.mapbase   =
+			ubi32_mailbox_resource[i].uart_base_addr;
+		ubi32_mailbox_ports[i].port.irq       =
+			ubi32_mailbox_resource[i].uart_irq;
+		ubi32_mailbox_ports[i].port.flags     = UPF_BOOT_AUTOCONF;
+		spin_lock_init(&ubi32_mailbox_ports[i].port.lock);
+
+		ubi32_mailbox_hw_init(&ubi32_mailbox_ports[i]);
+	}
+
+}
+
+#ifdef CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE
+/*
+ * If the port was already initialised (eg, by a boot loader),
+ * try to determine the current setup.
+ */
+static void __init
+ubi32_mailbox_console_get_options(struct ubi32_mailbox_port *uart, int *baud,
+			   int *parity, int *bits)
+{
+	unsigned short status;
+
+	status = UART_GET_IER(uart) & (ERBFI | ETBEI);
+	if (status == (ERBFI | ETBEI)) {
+		/* ok, the port was enabled */
+		unsigned short lcr;
+		unsigned short dlh, dll;
+
+		lcr = UART_GET_LCR(uart);
+
+		*parity = 'n';
+		if (lcr & PEN) {
+			if (lcr & EPS)
+				*parity = 'e';
+			else
+				*parity = 'o';
+		}
+		switch (lcr & 0x03) {
+			case 0:	*bits = 5; break;
+			case 1:	*bits = 6; break;
+			case 2:	*bits = 7; break;
+			case 3:	*bits = 8; break;
+		}
+
+		dll = UART_GET_DLL(uart);
+		dlh = UART_GET_DLH(uart);
+
+		*baud = get_sclk() / (16*(dll | dlh << 8));
+	}
+	pr_debug("%s:baud = %d, parity = %c, bits= %d\n", __FUNCTION__, *baud, *parity, *bits);
+}
+#endif
+
+#if defined(CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE) || defined(CONFIG_EARLY_PRINTK)
+static struct uart_driver ubi32_mailbox_reg;
+
+static int __init
+ubi32_mailbox_console_setup(struct console *co, char *options)
+{
+	struct ubi32_mailbox_port *uart;
+# ifdef CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE
+	int baud = SERIAL_UBICOM_BAUDRATE;
+	int bits = 8;
+	int parity = 'n';
+	int flow = 'n';
+# endif
+
+	/*
+	 * Check whether an invalid uart number has been specified, and
+	 * if so, search for the first available port that does have
+	 * console support.
+	 */
+	if (co->index == -1 || co->index >= NR_PORTS)
+		co->index = 0;
+	uart = &ubi32_mailbox_ports[co->index];
+
+# ifdef CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE
+	if (options)
+		uart_parse_options(options, &baud, &parity, &bits, &flow);
+	else
+		ubi32_mailbox_console_get_options(uart, &baud, &parity, &bits);
+
+	//JB return uart_set_options(&uart->port, co, baud, parity, bits, flow);
+	return 0;
+# else
+	return 0;
+# endif
+}
+#endif /* defined (CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE) ||
+				 defined (CONFIG_EARLY_PRINTK) */
+
+#ifdef CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE
+static void ubi32_mailbox_console_putchar(struct uart_port *port, int ch)
+{
+//	struct ubi32_mailbox_port *uart = (struct ubi32_mailbox_port *)port;
+	while (!(UART_GET_LSR(uart) & THRE))
+		barrier();
+	UART_PUT_CHAR(uart, ch);
+	SSYNC();
+}
+
+/*
+ * Interrupts are disabled on entering
+ */
+static void
+ubi32_mailbox_console_write(struct console *co, const char *s, unsigned int count)
+{
+	struct ubi32_mailbox_port *uart = &ubi32_mailbox_ports[co->index];
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(&uart->port.lock, flags);
+	uart_console_write(&uart->port, s, count, ubi32_mailbox_console_putchar);
+	spin_unlock_irqrestore(&uart->port.lock, flags);
+
+}
+
+static struct console ubi32_mailbox_console = {
+	.name		= UBI32_MAILBOX_NAME,
+	.write		= ubi32_mailbox_console_write,
+	.device		= uart_console_device,
+	.setup		= ubi32_mailbox_console_setup,
+	.flags		= CON_PRINTBUFFER,
+	.index		= -1,
+	.data		= &ubi32_mailbox_reg,
+};
+
+static int __init ubi32_mailbox_console_init(void)
+{
+	ubi32_mailbox_init_ports();
+	register_console(&ubi32_mailbox_console);
+	return 0;
+}
+console_initcall(ubi32_mailbox_console_init);
+
+#define UBI32_MAILBOX_CONSOLE	&ubi32_mailbox_console
+#else
+#define UBI32_MAILBOX_CONSOLE	NULL
+#endif /* CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE */
+
+
+#ifdef CONFIG_EARLY_PRINTK
+static __init void ubi32_mailbox_early_putc(struct uart_port *port, int ch)
+{
+	UART_PUT_CHAR(uart, ch);
+}
+
+static __init void ubi32_mailbox_early_write(struct console *con, const char *s,
+					unsigned int n)
+{
+	struct ubi32_mailbox_port *uart = &ubi32_mailbox_ports[con->index];
+	unsigned int i;
+
+	for (i = 0; i < n; i++, s++) {
+		if (*s == '\n')
+			ubi32_mailbox_early_putc(&uart->port, '\r');
+		ubi32_mailbox_early_putc(&uart->port, *s);
+	}
+}
+
+static struct __init console ubi32_mailbox_early_console = {
+	.name = "early_UM",
+	.write = ubi32_mailbox_early_write,
+	.device = uart_console_device,
+	.flags = CON_PRINTBUFFER,
+	.setup = ubi32_mailbox_console_setup,
+	.index = -1,
+	.data  = &ubi32_mailbox_reg,
+};
+
+/*
+ * XXX Unused in our driver. Need to find out what the termios initialization is good/needed for.
+ */
+struct console __init *ubi32_mailbox_early_init(unsigned int port,
+						unsigned int cflag)
+{
+	struct ubi32_mailbox_port *uart;
+	struct ktermios t;
+
+	if (port == -1 || port >= NR_PORTS)
+		port = 0;
+	ubi32_mailbox_init_ports();
+	ubi32_mailbox_early_console.index = port;
+	uart = &ubi32_mailbox_ports[port];
+	t.c_cflag = cflag;
+	t.c_iflag = 0;
+	t.c_oflag = 0;
+	t.c_lflag = ICANON;
+	t.c_line = port;
+	ubi32_mailbox_set_termios(&uart->port, &t, &t);
+	return &ubi32_mailbox_early_console;
+}
+
+#endif /* CONFIG_SERIAL_UBI32_MAILBOX_CONSOLE */
+
+static struct uart_driver ubi32_mailbox_reg = {
+	.owner			= THIS_MODULE,
+	.driver_name		= "ubi32_mailbox",
+	.dev_name		= UBI32_MAILBOX_NAME,
+	.major			= UBI32_MAILBOX_MAJOR,
+	.minor			= UBI32_MAILBOX_MINOR,
+	.nr			= NR_PORTS,
+	.cons			= UBI32_MAILBOX_CONSOLE,
+};
+
+static int ubi32_mailbox_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct ubi32_mailbox_port *uart = platform_get_drvdata(dev);
+
+	if (uart)
+		uart_suspend_port(&ubi32_mailbox_reg, &uart->port);
+
+	return 0;
+}
+
+static int ubi32_mailbox_resume(struct platform_device *dev)
+{
+	struct ubi32_mailbox_port *uart = platform_get_drvdata(dev);
+
+	if (uart)
+		uart_resume_port(&ubi32_mailbox_reg, &uart->port);
+
+	return 0;
+}
+
+static int ubi32_mailbox_probe(struct platform_device *dev)
+{
+	struct resource *res = dev->resource;
+	int i;
+
+	for (i = 0; i < dev->num_resources; i++, res++)
+		if (res->flags & IORESOURCE_MEM)
+			break;
+
+	if (i < dev->num_resources) {
+		for (i = 0; i < NR_PORTS; i++, res++) {
+			if (ubi32_mailbox_ports[i].port.mapbase != res->start)
+				continue;
+			ubi32_mailbox_ports[i].port.dev = &dev->dev;
+			uart_add_one_port(&ubi32_mailbox_reg, &ubi32_mailbox_ports[i].port);
+			platform_set_drvdata(dev, &ubi32_mailbox_ports[i]);
+		}
+	}
+
+	return 0;
+}
+
+static int ubi32_mailbox_remove(struct platform_device *pdev)
+{
+	struct ubi32_mailbox_port *uart = platform_get_drvdata(pdev);
+
+	platform_set_drvdata(pdev, NULL);
+
+	if (uart)
+		uart_remove_one_port(&ubi32_mailbox_reg, &uart->port);
+
+	return 0;
+}
+
+static struct platform_driver ubi32_mailbox_driver = {
+	.probe		= ubi32_mailbox_probe,
+	.remove		= ubi32_mailbox_remove,
+	.suspend	= ubi32_mailbox_suspend,
+	.resume		= ubi32_mailbox_resume,
+	.driver		= {
+		.name	= "ubi32-mbox",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init ubi32_mailbox_init(void)
+{
+	int ret;
+
+	pr_info("Serial: Ubicom32 mailbox serial driver.\n");
+
+	mailbox_console_flg = TRUE;
+	num_timeouts = 0;
+	ubi32_mailbox_init_ports();
+
+	ret = uart_register_driver(&ubi32_mailbox_reg);
+	if (ret == 0) {
+		ret = platform_driver_register(&ubi32_mailbox_driver);
+		if (ret) {
+			pr_debug("uart register failed\n");
+			uart_unregister_driver(&ubi32_mailbox_reg);
+		}
+	}
+
+	/*
+	 * XXX HACK: currently probe does not get called, but the port needs to be added to work.
+	 */
+	uart_add_one_port(&ubi32_mailbox_reg, &ubi32_mailbox_ports[0].port);
+	return ret;
+}
+
+static void __exit ubi32_mailbox_exit(void)
+{
+	platform_driver_unregister(&ubi32_mailbox_driver);
+	uart_unregister_driver(&ubi32_mailbox_reg);
+}
+
+module_init(ubi32_mailbox_init);
+module_exit(ubi32_mailbox_exit);
+
+MODULE_ALIAS_CHARDEV_MAJOR(UBI32_MAILBOX_MAJOR);
+MODULE_ALIAS("platform:ubi32_mailbox");

target/linux/ubicom32/files/drivers/serial/ubi32_serdes.c

@@ -0,0 +1,817 @@
+/*
+ * drivers/serial/ubi32_serdes.c
+ *   Ubicom32 On-Chip Serial Driver
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+#include <linux/module.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/sysrq.h>
+#include <linux/platform_device.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial_core.h>
+
+#include <asm/ip5000.h>
+#include <asm/ubicom32suart.h>
+
+
+#define SERIAL_UBICOM_PIN_RXD	(1 << 0)
+#define SERIAL_UBICOM_PIN_TXD	(1 << 6)
+#define SERIAL_UBICOM_CTL0	0x8b300000
+#define SERIAL_UBICOM_CTL1	0x00000009
+
+#define SERIAL_UBICOM_DATA_BIT	8	/* Fixed parameter - do not change */
+#define SERIAL_UBICOM_PAR_BIT	0	/* Fixed parameter - do not change */
+#define SERIAL_UBICOM_STOP_BIT	1	/* Fixed parameter - do not change */
+
+/* UART name and device definitions */
+#define UBI32_SERDES_NAME	"ttyUS" // XXX
+#define UBI32_SERDES_MAJOR	206 // XXX
+#define UBI32_SERDES_MINOR	64 // XXX
+
+#define PORT_UBI32_SERDES	1234
+#define NR_PORTS 1
+
+struct uart_port ubi32_serdes_ports[NR_PORTS];
+
+struct ubi32_serdes_resource {
+	void *uart_base_addr;
+	int uart_irq;
+	int uart_clock;
+} ubi32_serdes_resource[NR_PORTS] = {
+	/*
+	 * Get params from kernel command line (required for early printk)
+	 * or from platform resources.
+	 */
+	{0, 0, 0}
+};
+
+/*
+ * Can get overridden by 'serdes=' kernel command line.
+ */
+static int ubi32_serdes_default_baud_rate = 115200;
+
+
+#define IO_PORT(port) ((struct ubicom32_io_port *)port->membase)
+#define IO_PORT_INT_STATUS(port) (IO_PORT(port)->int_status)
+#define IO_PORT_INT_MASK(port) (IO_PORT(port)->int_mask)
+#define IO_PORT_INT_CLR(port) (IO_PORT(port)->int_clr)
+
+
+/*
+ * ubi32_serdes_get_char()
+ */
+static u8_t ubi32_serdes_get_char(struct ubicom32_io_port *io_port)
+{
+	/*
+	 * Read from hardware (forced 32-bit atomic read).
+	 */
+	u32_t data = 0;
+
+	if ( io_port ) {
+		io_port->int_clr = IO_PORTX_INT_SERDES_RXBF;
+		asm volatile (
+			"move.4		%0, %1		\n\t"
+			: "=r" (data)
+			: "m" (*(u32_t *)&(io_port->rx_fifo))
+			);
+	}
+
+	return (u8_t)(data & 0x000000ff);
+}
+
+/*
+ * ubi32_serdes_put_char()
+ */
+static void ubi32_serdes_put_char(struct ubicom32_io_port *io_port, u8_t c)
+{
+	u32_t data = 0x0000fe00 | (c << 1);
+
+	if ( io_port ) {
+		/*
+		 * Fixed data format:
+		 * [LSB]1 start bit - 8 data bits - no parity - 1 stop bit[MSB]
+		 */
+		io_port->int_clr = IO_PORTX_INT_SERDES_TXBE;
+		io_port->ctl2 = data;
+		io_port->int_set = IO_PORTX_INT_SERDES_TXBUF_VALID;
+	}
+}
+
+static void ubi32_serdes_hw_init(struct uart_port *port, int baud)
+{
+	struct ubicom32_io_port *io_port = IO_PORT(port);
+
+	if ( io_port ) {
+		/*
+		 * Put port functions 1-4 into reset state.
+		 * Function 0 (GPIO) does not need or have a reset bit.
+		 *
+		 * Select SERDES function for restart below.
+		 */
+		io_port->function =
+			IO_FUNC_FUNCTION_RESET(1) | IO_FUNC_FUNCTION_RESET(2) |
+			IO_FUNC_FUNCTION_RESET(3) | IO_FUNC_FUNCTION_RESET(4) |
+			IO_PORTX_FUNC_SERDES;
+
+		/*
+		 * Configure SERDES baudrate
+		 */
+		if ( baud == 0 ) {
+			baud = ubi32_serdes_default_baud_rate;
+		}
+
+		io_port->ctl0 =
+			SERIAL_UBICOM_CTL0 |
+			((port->uartclk / (16 * baud)) - 1);
+
+		io_port->ctl1 =
+			SERIAL_UBICOM_CTL1;
+
+		/*
+		 * don't interrupt until startup and start_tx
+		 */
+		io_port->int_mask = 0;
+
+		/*
+		 * Set TXD pin output, RXD input and prevent GPIO
+		 * override on the TXD & RXD pins
+		 */
+		io_port->gpio_ctl &= ~SERIAL_UBICOM_PIN_RXD;
+		io_port->gpio_ctl |= SERIAL_UBICOM_PIN_TXD;
+		io_port->gpio_mask &= ~(SERIAL_UBICOM_PIN_RXD | SERIAL_UBICOM_PIN_TXD);
+
+		/*
+		 * Restart (un-reset) the port's SERDES function.
+		 */
+		io_port->function &= ~(IO_FUNC_FUNCTION_RESET(IO_PORTX_FUNC_SERDES));
+	}
+}
+
+#define ULITE_STATUS_RXVALID IO_PORTX_INT_SERDES_RXBF
+#define ULITE_STATUS_OVERRUN 0
+#define ULITE_STATUS_FRAME 0
+#define ULITE_STATUS_PARITY 0
+#define ULITE_STATUS_TXEMPTY IO_PORTX_INT_SERDES_TXBE
+#define ULITE_STATUS_TXFULL 0
+
+static int ubi32_serdes_receive(struct uart_port *port, int stat)
+{
+	struct tty_struct *tty = port->info->port.tty;
+	unsigned char ch = 0;
+	char flag = TTY_NORMAL;
+
+	if ((stat & (ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN
+		     | ULITE_STATUS_FRAME)) == 0)
+		return 0;
+
+	/* stats */
+	if (stat & ULITE_STATUS_RXVALID) {
+		port->icount.rx++;
+		ch = ubi32_serdes_get_char((struct ubicom32_io_port *)port->membase);
+
+		if (stat & ULITE_STATUS_PARITY)
+			port->icount.parity++;
+	}
+
+	if (stat & ULITE_STATUS_OVERRUN)
+		port->icount.overrun++;
+
+	if (stat & ULITE_STATUS_FRAME)
+		port->icount.frame++;
+
+
+	/* drop byte with parity error if IGNPAR specificed */
+	if (stat & port->ignore_status_mask & ULITE_STATUS_PARITY)
+		stat &= ~ULITE_STATUS_RXVALID;
+
+	stat &= port->read_status_mask;
+
+	if (stat & ULITE_STATUS_PARITY)
+		flag = TTY_PARITY;
+
+	stat &= ~port->ignore_status_mask;
+
+	if (stat & ULITE_STATUS_RXVALID)
+		tty_insert_flip_char(tty, ch, flag);
+
+	if (stat & ULITE_STATUS_FRAME)
+		tty_insert_flip_char(tty, 0, TTY_FRAME);
+
+	if (stat & ULITE_STATUS_OVERRUN)
+		tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+
+	return 1;
+}
+
+/*
+ * interrupts are disabled on entry
+ */
+static void ubi32_serdes_stop_tx(struct uart_port *port)
+{
+	IO_PORT_INT_MASK(port) = IO_PORT_INT_MASK(port) & ~IO_PORTX_INT_SERDES_TXBE;
+}
+
+static int ubi32_serdes_transmit(struct uart_port *port, int stat)
+{
+	struct circ_buf *xmit  = &port->info->xmit;
+
+	if (!(stat & IO_PORTX_INT_SERDES_TXBE))
+		return 0;
+
+	if (port->x_char) {
+		ubi32_serdes_put_char(IO_PORT(port), port->x_char);
+		port->x_char = 0;
+		port->icount.tx++;
+		return 1;
+	}
+
+	if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
+		ubi32_serdes_stop_tx(port);
+		return 0;
+	}
+
+	ubi32_serdes_put_char(IO_PORT(port), xmit->buf[xmit->tail]);
+	xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1);
+	port->icount.tx++;
+
+	/* wake up */
+	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+		uart_write_wakeup(port);
+
+	if (uart_circ_empty(xmit))
+		ubi32_serdes_stop_tx(port);
+
+	return 1;
+}
+
+/*
+ * port is locked and interrupts are disabled
+ */
+static void ubi32_serdes_start_tx(struct uart_port *port)
+{
+	IO_PORT_INT_MASK(port) = IO_PORT_INT_MASK(port) | IO_PORTX_INT_SERDES_TXBE;
+	ubi32_serdes_transmit(port, IO_PORT_INT_STATUS(port));
+}
+
+/*
+ * Interrupts are enabled
+ */
+static void ubi32_serdes_stop_rx(struct uart_port *port)
+{
+	/* don't forward any more data (like !CREAD) */
+	port->ignore_status_mask = IO_PORTX_INT_SERDES_RXBF;
+}
+
+/*
+ * Set the modem control timer to fire immediately.
+ */
+static void ubi32_serdes_enable_ms(struct uart_port *port)
+{
+	/* N/A */
+}
+
+static irqreturn_t ubi32_serdes_isr(int irq, void *dev_id)
+{
+	struct uart_port *port = dev_id;
+	int busy;
+
+	spin_lock(&port->lock);
+
+	do {
+		int stat = IO_PORT_INT_STATUS(port);
+		busy  = ubi32_serdes_receive(port, stat);
+		busy |= ubi32_serdes_transmit(port, stat);
+	} while (busy);
+
+	tty_flip_buffer_push(port->info->port.tty);
+
+	spin_unlock(&port->lock);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * Return TIOCSER_TEMT when transmitter is not busy.
+ */
+static unsigned int ubi32_serdes_tx_empty(struct uart_port *port)
+{
+	unsigned long flags;
+	unsigned int ret;
+
+	spin_lock_irqsave(&port->lock, flags);
+	ret = IO_PORT_INT_STATUS(port);
+	spin_unlock_irqrestore(&port->lock, flags);
+
+	return ret & ULITE_STATUS_TXEMPTY ? TIOCSER_TEMT : 0;
+}
+
+static unsigned int ubi32_serdes_get_mctrl(struct uart_port *port)
+{
+	return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
+}
+
+static void ubi32_serdes_set_mctrl(struct uart_port *port, unsigned int mctrl)
+{
+	/* N/A */
+}
+
+/*
+ * Interrupts are always disabled.
+ */
+static void ubi32_serdes_break_ctl(struct uart_port *port, int break_state)
+{
+	/* N/A */
+}
+
+static int ubi32_serdes_startup(struct uart_port *port)
+{
+	if (request_irq(port->irq, ubi32_serdes_isr, IRQF_DISABLED,
+	     "UBI32_SERDES", port)) {
+		printk(KERN_NOTICE "Unable to attach port interrupt\n");
+		return -EBUSY;
+	}
+
+	IO_PORT_INT_CLR(port) = IO_PORTX_INT_SERDES_RXBF;
+	IO_PORT_INT_MASK(port) = IO_PORTX_INT_SERDES_RXBF;
+	return 0;
+}
+
+static void ubi32_serdes_shutdown(struct uart_port *port)
+{
+	struct ubi32_serdes_port *uart = (struct ubi32_serdes_port *)port;
+
+	IO_PORT_INT_MASK(port) = 0;
+	free_irq(port->irq, uart);
+}
+
+static void
+ubi32_serdes_set_termios(struct uart_port *port, struct ktermios *termios,
+		   struct ktermios *old)
+{
+	unsigned long flags;
+	unsigned int baud;
+
+	spin_lock_irqsave(&port->lock, flags);
+
+	port->read_status_mask = ULITE_STATUS_RXVALID | ULITE_STATUS_OVERRUN
+		| ULITE_STATUS_TXFULL;
+
+	if (termios->c_iflag & INPCK)
+		port->read_status_mask |=
+			ULITE_STATUS_PARITY | ULITE_STATUS_FRAME;
+
+	port->ignore_status_mask = 0;
+	if (termios->c_iflag & IGNPAR)
+		port->ignore_status_mask |= ULITE_STATUS_PARITY
+			| ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN;
+
+	/* ignore all characters if CREAD is not set */
+	if ((termios->c_cflag & CREAD) == 0)
+		port->ignore_status_mask |=
+			ULITE_STATUS_RXVALID | ULITE_STATUS_PARITY
+			| ULITE_STATUS_FRAME | ULITE_STATUS_OVERRUN;
+
+	/* update timeout */
+	baud = uart_get_baud_rate(port, termios, old, 0, 460800);
+	uart_update_timeout(port, termios->c_cflag, baud);
+
+	IO_PORT(port)->ctl0 = SERIAL_UBICOM_CTL0 |
+			((port->uartclk / (16 * baud)) - 1);
+
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+
+static const char *ubi32_serdes_type(struct uart_port *port)
+{
+	return port->type == PORT_UBI32_SERDES ? "UBI32_SERDES" : NULL;
+}
+
+/*
+ * Release the memory region(s) being used by 'port'.
+ */
+static void ubi32_serdes_release_port(struct uart_port *port)
+{
+}
+
+/*
+ * Request the memory region(s) being used by 'port'.
+ */
+static int ubi32_serdes_request_port(struct uart_port *port)
+{
+	return 0;
+}
+
+/*
+ * Configure/autoconfigure the port.
+ */
+static void ubi32_serdes_config_port(struct uart_port *port, int flags)
+{
+	if (flags & UART_CONFIG_TYPE &&
+	    ubi32_serdes_request_port(port) == 0)
+		port->type = PORT_UBI32_SERDES;
+}
+
+/*
+ * Verify the new serial_struct (for TIOCSSERIAL).
+ * The only change we allow are to the flags and type, and
+ * even then only between PORT_UBI32_SERDES and PORT_UNKNOWN
+ */
+static int
+ubi32_serdes_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+	return 0;
+}
+
+static struct uart_ops ubi32_serdes_pops = {
+	.tx_empty	= ubi32_serdes_tx_empty,
+	.set_mctrl	= ubi32_serdes_set_mctrl,
+	.get_mctrl	= ubi32_serdes_get_mctrl,
+	.stop_tx	= ubi32_serdes_stop_tx,
+	.start_tx	= ubi32_serdes_start_tx,
+	.stop_rx	= ubi32_serdes_stop_rx,
+	.enable_ms	= ubi32_serdes_enable_ms,
+	.break_ctl	= ubi32_serdes_break_ctl,
+	.startup	= ubi32_serdes_startup,
+	.shutdown	= ubi32_serdes_shutdown,
+	.set_termios	= ubi32_serdes_set_termios,
+	.type		= ubi32_serdes_type,
+	.release_port	= ubi32_serdes_release_port,
+	.request_port	= ubi32_serdes_request_port,
+	.config_port	= ubi32_serdes_config_port,
+	.verify_port	= ubi32_serdes_verify_port,
+};
+
+static void __init ubi32_serdes_init_ports(void)
+{
+	int i;
+
+	for (i = 0; i < NR_PORTS; i++) {
+		ubi32_serdes_ports[i].uartclk   = ubi32_serdes_resource[i].uart_clock;
+		ubi32_serdes_ports[i].ops       = &ubi32_serdes_pops;
+		ubi32_serdes_ports[i].line      = i;
+		ubi32_serdes_ports[i].iotype    = UPIO_MEM;
+		ubi32_serdes_ports[i].membase   =
+			(void __iomem *)ubi32_serdes_resource[i].uart_base_addr;
+		ubi32_serdes_ports[i].mapbase   =
+			(resource_size_t)ubi32_serdes_resource[i].uart_base_addr;
+		ubi32_serdes_ports[i].irq       =
+			ubi32_serdes_resource[i].uart_irq;
+		ubi32_serdes_ports[i].flags     = UPF_BOOT_AUTOCONF;
+
+		ubi32_serdes_hw_init(&ubi32_serdes_ports[i], 0);
+	}
+
+}
+
+#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
+/*
+ * If the port was already initialised (eg, by a boot loader),
+ * try to determine the current setup.
+ */
+static void __init
+ubi32_serdes_console_get_options(struct uart_port *port, int *baud)
+{
+	u32 round_to = 1200;
+	u32 real_baud;
+
+	/*
+	 * We might get called before platform init and with no
+	 * kernel command line options, so port might be NULL.
+	 */
+	*baud = ubi32_serdes_default_baud_rate;;
+	if ( IO_PORT(port) == 0 )
+		return;
+
+	real_baud = port->uartclk
+		/ (16 * ((IO_PORT(port)->ctl0 & ~SERIAL_UBICOM_CTL0) + 1));
+
+	*baud = ((real_baud + round_to - 1) / round_to) * round_to;
+
+	pr_debug("%s:baud = %d, real_baud = %d\n", __FUNCTION__, *baud, real_baud);
+}
+#endif
+
+#if defined(CONFIG_SERIAL_UBI32_SERDES_CONSOLE) || defined(CONFIG_EARLY_PRINTK)
+static struct uart_driver ubi32_serdes_reg;
+
+static int __init
+ubi32_serdes_console_setup(struct console *co, char *options)
+{
+	struct uart_port *port;
+#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
+	int baud = ubi32_serdes_default_baud_rate;
+	int bits = 8;
+	int parity = 'n';
+	int flow = 'n';
+#endif
+
+	/*
+	 * Check whether an invalid uart number has been specified, and
+	 * if so, search for the first available port that does have
+	 * console support.
+	 */
+	if (co->index == -1 || co->index >= NR_PORTS)
+		co->index = 0;
+	port = &ubi32_serdes_ports[co->index];
+
+#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
+	if (options) {
+		uart_parse_options(options, &baud, &parity, &bits, &flow);
+		ubi32_serdes_hw_init(port, baud);
+	}
+	else
+		ubi32_serdes_console_get_options(port, &baud);
+
+	return uart_set_options(port, co, baud, parity, bits, flow);
+#else
+	return 0;
+#endif
+}
+#endif /* defined (CONFIG_SERIAL_UBI32_SERDES_CONSOLE) ||
+				 defined (CONFIG_EARLY_PRINTK) */
+
+#ifdef CONFIG_SERIAL_UBI32_SERDES_CONSOLE
+static void
+ubi32_serdes_console_putchar(struct uart_port *port, int ch)
+{
+	if ( IO_PORT(port) ) {
+		while (!(IO_PORT_INT_STATUS(port) & IO_PORTX_INT_SERDES_TXBE))
+			barrier();
+		ubi32_serdes_put_char(IO_PORT(port), ch);
+	}
+}
+
+/*
+ * Interrupts are disabled on entering
+ */
+static void
+ubi32_serdes_console_write(struct console *co, const char *s, unsigned int count)
+{
+	struct uart_port *port = &ubi32_serdes_ports[co->index];
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(&port->lock, flags);
+	uart_console_write(port, s, count, ubi32_serdes_console_putchar);
+	spin_unlock_irqrestore(&port->lock, flags);
+
+}
+
+static struct console ubi32_serdes_console = {
+	.name		= UBI32_SERDES_NAME,
+	.write		= ubi32_serdes_console_write,
+	.device		= uart_console_device,
+	.setup		= ubi32_serdes_console_setup,
+	.flags		= CON_PRINTBUFFER,
+	.index		= -1,
+	.data		= &ubi32_serdes_reg,
+};
+
+static int __init ubi32_serdes_console_init(void)
+{
+	ubi32_serdes_init_ports();
+	register_console(&ubi32_serdes_console);
+	return 0;
+}
+console_initcall(ubi32_serdes_console_init);
+
+#define UBI32_SERDES_CONSOLE	&ubi32_serdes_console
+#else
+#define UBI32_SERDES_CONSOLE	NULL
+#endif /* CONFIG_SERIAL_UBI32_SERDES_CONSOLE */
+
+
+#ifdef CONFIG_EARLY_PRINTK
+static __init void ubi32_serdes_early_putc(struct uart_port *port, int ch)
+{
+	unsigned timeout = 0xffff;
+
+	while ((!(IO_PORT_INT_STATUS(port) & IO_PORTX_INT_SERDES_TXBE)) && --timeout)
+		cpu_relax();
+	ubi32_serdes_put_char(IO_PORT(port), ch);
+}
+
+static __init void ubi32_serdes_early_write(struct console *con, const char *s,
+					unsigned int n)
+{
+	struct uart_port *port = &ubi32_serdes_ports[con->index];
+	unsigned int i;
+
+	for (i = 0; i < n; i++, s++) {
+		if (*s == '\n')
+			ubi32_serdes_early_putc(port, '\r');
+		ubi32_serdes_early_putc(port, *s);
+	}
+}
+
+static struct __init console ubi32_serdes_early_console = {
+	.name = "early_US",
+	.write = ubi32_serdes_early_write,
+	.device = uart_console_device,
+	.flags = CON_PRINTBUFFER,
+	.setup = ubi32_serdes_console_setup,
+	.index = -1,
+	.data  = &ubi32_serdes_reg,
+};
+
+/*
+ * XXX Unused in our driver. Need to find out what the termios initialization is good/needed for.
+ */
+struct console __init *ubi32_serdes_early_init(unsigned int port_index,
+						unsigned int cflag)
+{
+	struct uart_port *uart;
+	struct ktermios t;
+
+	if (port_index == -1 || port_index >= NR_PORTS)
+		port_index = 0;
+	ubi32_serdes_init_ports();
+	ubi32_serdes_early_console.index = port_index;
+	uart = &ubi32_serdes_ports[port_index];
+	t.c_cflag = cflag;
+	t.c_iflag = 0;
+	t.c_oflag = 0;
+	t.c_lflag = ICANON;
+	t.c_line = port_index;
+	ubi32_serdes_set_termios(uart, &t, &t);
+	return &ubi32_serdes_early_console;
+}
+
+#endif /* CONFIG_SERIAL_UBI32_SERDES_CONSOLE */
+
+static struct uart_driver ubi32_serdes_reg = {
+	.owner			= THIS_MODULE,
+	.driver_name		= "ubi32_serdes",
+	.dev_name		= UBI32_SERDES_NAME,
+	.major			= UBI32_SERDES_MAJOR,
+	.minor			= UBI32_SERDES_MINOR,
+	.nr			= NR_PORTS,
+	.cons			= UBI32_SERDES_CONSOLE,
+};
+
+static int ubi32_serdes_suspend(struct platform_device *dev, pm_message_t state)
+{
+	struct uart_port *port = platform_get_drvdata(dev);
+
+	if (port)
+		uart_suspend_port(&ubi32_serdes_reg, port);
+
+	return 0;
+}
+
+static int ubi32_serdes_resume(struct platform_device *dev)
+{
+	struct uart_port *port = platform_get_drvdata(dev);
+
+	if (port)
+		uart_resume_port(&ubi32_serdes_reg, port);
+
+	return 0;
+}
+
+static int ubi32_serdes_probe(struct platform_device *dev)
+{
+	struct resource *res = dev->resource;
+	int i;
+
+	for (i = 0; i < dev->num_resources; i++, res++) {
+		if (res->flags & IORESOURCE_MEM) {
+			ubi32_serdes_resource[0].uart_base_addr = (void *) res->start;
+		}
+		else if (res->flags & IORESOURCE_IRQ) {
+			ubi32_serdes_resource[0].uart_irq = res->start;
+		}
+		else if (res->flags & UBICOM32_SUART_IORESOURCE_CLOCK) {
+			ubi32_serdes_resource[0].uart_clock = res->start;
+		}
+	}
+
+	ubi32_serdes_init_ports();
+
+	return 0;
+}
+
+static int ubi32_serdes_remove(struct platform_device *pdev)
+{
+	struct uart_port *port = platform_get_drvdata(pdev);
+
+	platform_set_drvdata(pdev, NULL);
+
+	if (port)
+		uart_remove_one_port(&ubi32_serdes_reg, port);
+
+	return 0;
+}
+
+static struct platform_driver ubi32_serdes_driver = {
+	.remove		= ubi32_serdes_remove,
+	.suspend	= ubi32_serdes_suspend,
+	.resume		= ubi32_serdes_resume,
+	.driver		= {
+		.name	= "ubicom32suart",
+		.owner	= THIS_MODULE,
+	},
+};
+
+
+#ifndef MODULE
+/*
+ * Called at boot time.
+ *
+ * You can specify IO base, IRQ, and clock for the serdes serial port
+ * using kernel command line "serdes=0xiobase,irq,clock".  Values
+ * specified will be overwritten by platform device data, if present.
+ */
+static int __init ubi32_serdes_setup(char *str)
+{
+#define N_PARMS   (4+1)
+	int ints[N_PARMS];
+	int i;
+
+	str = get_options(str, ARRAY_SIZE(ints), ints);
+
+	for (i = 0; i < N_PARMS; i++) {
+		if (i < ints[0]) {
+			if (i == 0) {
+				ubi32_serdes_resource[0].uart_base_addr = (void *) ints[i+1];
+			}
+			else if (i == 1) {
+				ubi32_serdes_resource[0].uart_irq = ints[i+1];
+			}
+			else if (i == 2) {
+				ubi32_serdes_resource[0].uart_clock = ints[i+1];
+			}
+			else if (i == 3) {
+				ubi32_serdes_default_baud_rate = ints[i+1];
+			}
+		}
+	}
+	return 1;
+}
+
+__setup("serdes=", ubi32_serdes_setup);
+#endif
+
+static int __init ubi32_serdes_init(void)
+{
+	int ret;
+
+	pr_info("Serial: Ubicom32 serdes uart serial driver\n");
+
+	ret = platform_driver_probe(&ubi32_serdes_driver, ubi32_serdes_probe);
+	if (ret != 0) {
+		printk(KERN_INFO "serdes platform_driver_probe() failed: %d\n", ret);
+		return ret;
+	}
+
+	ubi32_serdes_init_ports();
+
+	ret = uart_register_driver(&ubi32_serdes_reg);
+	if ( ret == 0 ) {
+		ret = uart_add_one_port(&ubi32_serdes_reg, &ubi32_serdes_ports[0]);
+		if ( ret != 0 ) {
+			uart_unregister_driver(&ubi32_serdes_reg);
+		}
+	}
+
+	return ret;
+}
+
+static void __exit ubi32_serdes_exit(void)
+{
+	platform_driver_unregister(&ubi32_serdes_driver);
+	uart_unregister_driver(&ubi32_serdes_reg);
+}
+
+module_init(ubi32_serdes_init);
+module_exit(ubi32_serdes_exit);
+
+MODULE_AUTHOR("Rainer Keller <rkeller@ubicom.com>");
+MODULE_DESCRIPTION("Ubicom generic serial port driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_CHARDEV_MAJOR(UBI32_SERDES_MAJOR);
+MODULE_ALIAS("platform:ubi32_serdes");

target/linux/ubicom32/files/drivers/spi/spi_ubicom32_gpio.c

@@ -0,0 +1,267 @@
+/*
+ * drivers/spi_spi_ubicom32_gpio.c
+ *	Ubicom32 GPIO based SPI driver
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+
+#include <linux/spi/spi.h>
+#include <linux/spi/spi_bitbang.h>
+
+#include <linux/gpio.h>
+
+#include <asm/ubicom32-spi-gpio.h>
+
+#define DRIVER_NAME "ubicom32-spi-gpio"
+
+struct ubicom32_spi_gpio {
+	struct spi_bitbang			 bitbang;
+
+	struct ubicom32_spi_gpio_platform_data	*pdata;
+
+	struct platform_device			*dev;
+};
+
+/*
+ * The following 4 functions are used by EXPAND_BITBANG_TXRX to bitbang the data out.
+ */
+static inline void setsck(struct spi_device *dev, int on)
+{
+	struct ubicom32_spi_gpio *usg = (struct ubicom32_spi_gpio *)spi_master_get_devdata(dev->master);
+	gpio_set_value(usg->pdata->pin_clk, on ? 1 : 0);
+}
+
+static inline void setmosi(struct spi_device *dev, int on)
+{
+	struct ubicom32_spi_gpio *usg = (struct ubicom32_spi_gpio *)spi_master_get_devdata(dev->master);
+	gpio_set_value(usg->pdata->pin_mosi, on ? 1 : 0);
+}
+
+static inline u32 getmiso(struct spi_device *dev)
+{
+	struct ubicom32_spi_gpio *usg = (struct ubicom32_spi_gpio *)spi_master_get_devdata(dev->master);
+	return gpio_get_value(usg->pdata->pin_miso) ? 1 : 0;
+}
+
+#define spidelay(x) ndelay(x)
+
+#define	EXPAND_BITBANG_TXRX
+#include <linux/spi/spi_bitbang.h>
+
+/*
+ * ubicom32_spi_gpio_txrx_mode0
+ */
+static u32 ubicom32_spi_gpio_txrx_mode0(struct spi_device *spi, unsigned nsecs, u32 word, u8 bits)
+{
+	return bitbang_txrx_be_cpha0(spi, nsecs, 0, word, bits);
+}
+
+/*
+ * ubicom32_spi_gpio_txrx_mode1
+ */
+static u32 ubicom32_spi_gpio_txrx_mode1(struct spi_device *spi, unsigned nsecs, u32 word, u8 bits)
+{
+	return bitbang_txrx_be_cpha1(spi, nsecs, 0, word, bits);
+}
+
+/*
+ * ubicom32_spi_gpio_txrx_mode2
+ */
+static u32 ubicom32_spi_gpio_txrx_mode2(struct spi_device *spi, unsigned nsecs, u32 word, u8 bits)
+{
+	return bitbang_txrx_be_cpha0(spi, nsecs, 1, word, bits);
+}
+
+/*
+ * ubicom32_spi_gpio_txrx_mode3
+ */
+static u32 ubicom32_spi_gpio_txrx_mode3(struct spi_device *spi, unsigned nsecs, u32 word, u8 bits)
+{
+	return bitbang_txrx_be_cpha1(spi, nsecs, 1, word, bits);
+}
+
+/*
+ * ubicom32_spi_gpio_chipselect
+ */
+static void ubicom32_spi_gpio_chipselect(struct spi_device *dev, int value)
+{
+	struct ubicom32_spi_gpio_controller_data *cd = (struct ubicom32_spi_gpio_controller_data *)dev->controller_data;
+	unsigned int cs_polarity = dev->mode & SPI_CS_HIGH ? 1 : 0;
+
+	if (value == BITBANG_CS_ACTIVE) {
+		gpio_set_value(cd->pin_cs, cs_polarity);
+		return;
+	}
+	gpio_set_value(cd->pin_cs, !cs_polarity);
+}
+
+/*
+ * ubicom32_spi_gpio_probe
+ */
+static int ubicom32_spi_gpio_probe(struct platform_device *dev)
+{
+	struct ubicom32_spi_gpio_platform_data *pdata;
+	struct spi_master *master;
+	struct ubicom32_spi_gpio *usg;
+	int ret;
+
+	master = spi_alloc_master(&dev->dev, sizeof(struct ubicom32_spi_gpio));
+	if (master == NULL) {
+		dev_err(&dev->dev, "failed to allocate spi master\n");
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	usg = (struct ubicom32_spi_gpio *)spi_master_get_devdata(master);
+
+	platform_set_drvdata(dev, usg);
+
+	/*
+	 * Copy in the platform data
+	 */
+	pdata = dev->dev.platform_data;
+	usg->pdata = dev->dev.platform_data;
+
+	/*
+	 * Request the GPIO lines
+	 */
+	ret = gpio_request(pdata->pin_mosi, "spi-mosi");
+	if (ret) {
+		dev_err(&dev->dev, "Failed to allocate spi-mosi GPIO\n");
+		goto err;
+	}
+
+	ret = gpio_request(pdata->pin_miso, "spi-miso");
+	if (ret) {
+		dev_err(&dev->dev, "Failed to allocate spi-miso GPIO\n");
+		goto err_nomiso;
+	}
+
+	ret = gpio_request(pdata->pin_clk, "spi-clk");
+	if (ret) {
+		dev_err(&dev->dev, "Failed to allocate spi-clk GPIO\n");
+		goto err_noclk;
+	}
+
+	/*
+	 * Setup spi-bitbang adaptor
+	 */
+	usg->bitbang.flags |= SPI_CS_HIGH;
+	usg->bitbang.master = spi_master_get(master);
+	usg->bitbang.master->bus_num = pdata->bus_num;
+	usg->bitbang.master->num_chipselect = pdata->num_chipselect;
+	usg->bitbang.chipselect = ubicom32_spi_gpio_chipselect;
+
+	usg->bitbang.txrx_word[SPI_MODE_0] = ubicom32_spi_gpio_txrx_mode0;
+	usg->bitbang.txrx_word[SPI_MODE_1] = ubicom32_spi_gpio_txrx_mode1;
+	usg->bitbang.txrx_word[SPI_MODE_2] = ubicom32_spi_gpio_txrx_mode2;
+	usg->bitbang.txrx_word[SPI_MODE_3] = ubicom32_spi_gpio_txrx_mode3;
+
+	/*
+	 * Setup the GPIO pins
+	 */
+	gpio_direction_output(pdata->pin_clk, pdata->clk_default);
+	gpio_direction_output(pdata->pin_mosi, 0);
+	gpio_direction_input(pdata->pin_miso);
+
+	/*
+	 * Ready to go
+	 */
+	ret = spi_bitbang_start(&usg->bitbang);
+	if (ret) {
+		goto err_no_bitbang;
+	}
+
+	return 0;
+
+err_no_bitbang:
+	spi_master_put(usg->bitbang.master);
+
+	gpio_free(pdata->pin_clk);
+
+err_noclk:
+	gpio_free(pdata->pin_miso);
+
+err_nomiso:
+	gpio_free(pdata->pin_mosi);
+
+err:
+	return ret;
+}
+
+/*
+ * ubicom32_spi_gpio_remove
+ */
+static int ubicom32_spi_gpio_remove(struct platform_device *dev)
+{
+	struct ubicom32_spi_gpio *sp = platform_get_drvdata(dev);
+
+	spi_bitbang_stop(&sp->bitbang);
+	spi_master_put(sp->bitbang.master);
+
+	return 0;
+}
+
+/*
+ * Work with hotplug and coldplug
+ */
+MODULE_ALIAS("platform:ubicom32_spi_gpio");
+
+static struct platform_driver ubicom32_spi_gpio_drv = {
+	.probe		= ubicom32_spi_gpio_probe,
+        .remove		= ubicom32_spi_gpio_remove,
+        .driver		= {
+		.name	= DRIVER_NAME,
+		.owner	= THIS_MODULE,
+        },
+};
+
+/*
+ * ubicom32_spi_gpio_init
+ */
+static int __init ubicom32_spi_gpio_init(void)
+{
+        return platform_driver_register(&ubicom32_spi_gpio_drv);
+}
+
+/*
+ * ubicom32_spi_gpio_exit
+ */
+static void __exit ubicom32_spi_gpio_exit(void)
+{
+        platform_driver_unregister(&ubicom32_spi_gpio_drv);
+}
+
+module_init(ubicom32_spi_gpio_init);
+module_exit(ubicom32_spi_gpio_exit);
+
+MODULE_DESCRIPTION("Ubicom32 SPI-GPIO Driver");
+MODULE_AUTHOR("Pat Tjin, <@ubicom.com>");
+MODULE_LICENSE("GPL");

target/linux/ubicom32/files/drivers/uio/uio_ubicom32ring.c

@@ -0,0 +1,288 @@
+/*
+ * drivers/uio/uio_ubicom32ring.c
+ *
+ * Userspace I/O platform driver for Ubicom32 ring buffers
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * Based on uio_ubicom32ring.c by Magnus Damm
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
+#include <linux/spinlock.h>
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/stringify.h>
+
+#include <asm/ip5000.h>
+#include <asm/ubicom32ring.h>
+
+#define DRIVER_NAME "uio_ubicom32ring"
+
+struct uio_ubicom32ring_data {
+	struct uio_info			*uioinfo;
+
+	struct uio_ubicom32ring_regs	*regs;
+
+	/*
+	 * IRQ used to kick the ring buffer
+	 */
+	int				irq_tx;
+	int				irq_rx;
+
+	spinlock_t			lock;
+
+	unsigned long			flags;
+
+	char				name[0];
+};
+
+static irqreturn_t uio_ubicom32ring_handler(int irq, struct uio_info *dev_info)
+{
+	struct uio_ubicom32ring_data *priv = dev_info->priv;
+
+	/* Just disable the interrupt in the interrupt controller, and
+	 * remember the state so we can allow user space to enable it later.
+	 */
+
+	if (!test_and_set_bit(0, &priv->flags))
+		disable_irq_nosync(irq);
+
+	return IRQ_HANDLED;
+}
+
+static int uio_ubicom32ring_irqcontrol(struct uio_info *dev_info, s32 irq_on)
+{
+	struct uio_ubicom32ring_data *priv = dev_info->priv;
+	unsigned long flags;
+
+	/* Allow user space to enable and disable the interrupt
+	 * in the interrupt controller, but keep track of the
+	 * state to prevent per-irq depth damage.
+	 *
+	 * Serialize this operation to support multiple tasks.
+	 */
+
+	spin_lock_irqsave(&priv->lock, flags);
+
+	if (irq_on & 2) {
+		/*
+		 * Kick the ring buffer (if we can)
+		 */
+		if (priv->irq_tx != 0xFF) {
+			ubicom32_set_interrupt(priv->irq_tx);
+		}
+	}
+
+	if (priv->irq_rx != 0xFF) {
+		if (irq_on & 1) {
+			if (test_and_clear_bit(0, &priv->flags))
+				enable_irq(dev_info->irq);
+		} else {
+			if (!test_and_set_bit(0, &priv->flags))
+				disable_irq(dev_info->irq);
+		}
+	}
+
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	return 0;
+}
+
+static int uio_ubicom32ring_probe(struct platform_device *pdev)
+{
+	struct uio_info *uioinfo;
+	struct uio_mem *uiomem;
+	struct uio_ubicom32ring_data *priv;
+	struct uio_ubicom32ring_regs *regs;
+	struct resource *mem_resource;
+	struct resource *irqtx_resource;
+	struct resource *irqrx_resource;
+	int ret = -EINVAL;
+	int i;
+
+	uioinfo = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
+	if (!uioinfo) {
+		dev_err(&pdev->dev, "unable to kmalloc\n");
+		return -ENOMEM;
+	}
+
+	/*
+	 * Allocate private data with some string space after
+	 */
+	i = sizeof(DRIVER_NAME) + 1;
+	i += pdev->dev.platform_data ? strlen(pdev->dev.platform_data) : 0;
+	priv = kzalloc(sizeof(struct uio_ubicom32ring_data) + i, GFP_KERNEL);
+	if (!priv) {
+		dev_err(&pdev->dev, "unable to kmalloc\n");
+		kfree(uioinfo);
+		return -ENOMEM;
+	}
+
+	strcpy(priv->name, DRIVER_NAME ":");
+	if (pdev->dev.platform_data) {
+		strcat(priv->name, pdev->dev.platform_data);
+	}
+	uioinfo->priv = priv;
+	uioinfo->name = priv->name;
+	uioinfo->version = "0.1";
+
+	priv->uioinfo = uioinfo;
+	spin_lock_init(&priv->lock);
+	priv->flags = 0; /* interrupt is enabled to begin with */
+
+	/*
+	 * Get our resources, the IRQ_TX and IRQ_RX are optional.
+	 */
+	priv->irq_tx = 0xFF;
+	irqtx_resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (irqtx_resource) {
+		priv->irq_tx = irqtx_resource->start;
+	}
+
+	uioinfo->irq = -1;
+	priv->irq_rx = 0xFF;
+	irqrx_resource = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
+	if (irqrx_resource) {
+		priv->irq_rx = irqrx_resource->start;
+		uioinfo->irq = priv->irq_rx;
+		uioinfo->handler = uio_ubicom32ring_handler;
+	}
+
+	mem_resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!mem_resource || !mem_resource->start) {
+		dev_err(&pdev->dev, "No valid memory resource found\n");
+		ret = -ENODEV;
+		goto fail;
+	}
+	regs = (struct uio_ubicom32ring_regs *)mem_resource->start;
+	priv->regs = regs;
+
+	if (regs->version != UIO_UBICOM32RING_REG_VERSION) {
+		dev_err(&pdev->dev, "version %d not supported\n", regs->version);
+		ret = -ENODEV;
+		goto fail;
+	}
+
+	/*
+	 * First range is the shared register space, if we have any
+	 */
+	uiomem = &uioinfo->mem[0];
+	if (regs->regs_size) {
+		uiomem->memtype = UIO_MEM_PHYS;
+		uiomem->addr = (u32_t)regs->regs;
+		uiomem->size = regs->regs_size;
+		++uiomem;
+		dev_info(&pdev->dev, "regs:%p (%u) / rings: %d found\n", regs->regs, regs->regs_size, regs->num_rings);
+	} else {
+		dev_info(&pdev->dev, "rings: %d found\n", regs->num_rings);
+	}
+
+	/*
+	 * The rest of the range correspond to the rings
+	 */
+	for (i = 0; i < regs->num_rings; i++) {
+		dev_info(&pdev->dev, "\t%d: entries:%d ring:%p\n",
+			 i, regs->rings[i]->entries, &(regs->rings[i]->ring));
+		if (uiomem >= &uioinfo->mem[MAX_UIO_MAPS]) {
+			dev_warn(&pdev->dev, "device has more than "
+					__stringify(MAX_UIO_MAPS)
+					" I/O memory resources.\n");
+			break;
+		}
+
+		uiomem->memtype = UIO_MEM_PHYS;
+		uiomem->addr = (u32_t)&(regs->rings[i]->head);
+		uiomem->size = (regs->rings[i]->entries * sizeof(u32_t)) +
+				sizeof(struct uio_ubicom32ring_desc);
+		++uiomem;
+	}
+
+	while (uiomem < &uioinfo->mem[MAX_UIO_MAPS]) {
+		uiomem->size = 0;
+		++uiomem;
+	}
+
+	/* This driver requires no hardware specific kernel code to handle
+	 * interrupts. Instead, the interrupt handler simply disables the
+	 * interrupt in the interrupt controller. User space is responsible
+	 * for performing hardware specific acknowledge and re-enabling of
+	 * the interrupt in the interrupt controller.
+	 *
+	 * Interrupt sharing is not supported.
+	 */
+	uioinfo->irq_flags = IRQF_DISABLED;
+	uioinfo->irqcontrol = uio_ubicom32ring_irqcontrol;
+
+	ret = uio_register_device(&pdev->dev, priv->uioinfo);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to register uio device\n");
+		goto fail;
+	}
+
+	platform_set_drvdata(pdev, priv);
+
+	dev_info(&pdev->dev, "'%s' using irq: rx %d tx %d, regs %p\n",
+		 priv->name, priv->irq_rx, priv->irq_tx, priv->regs);
+
+	return 0;
+
+fail:
+	kfree(uioinfo);
+	kfree(priv);
+	return ret;
+}
+
+static int uio_ubicom32ring_remove(struct platform_device *pdev)
+{
+	struct uio_ubicom32ring_data *priv = platform_get_drvdata(pdev);
+
+	uio_unregister_device(priv->uioinfo);
+	kfree(priv->uioinfo);
+	kfree(priv);
+	return 0;
+}
+
+static struct platform_driver uio_ubicom32ring = {
+	.probe = uio_ubicom32ring_probe,
+	.remove = uio_ubicom32ring_remove,
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+static int __init uio_ubicom32ring_init(void)
+{
+	return platform_driver_register(&uio_ubicom32ring);
+}
+
+static void __exit uio_ubicom32ring_exit(void)
+{
+	platform_driver_unregister(&uio_ubicom32ring);
+}
+
+module_init(uio_ubicom32ring_init);
+module_exit(uio_ubicom32ring_exit);
+
+MODULE_AUTHOR("Patrick Tjin");
+MODULE_DESCRIPTION("Userspace I/O driver for Ubicom32 ring buffers");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);

target/linux/ubicom32/files/drivers/usb/musb/ubi32_usb.c

@@ -0,0 +1,156 @@
+/*
+ * drivers/usb/musb/ubi32_usb.c
+ *   Ubicom32 usb controller driver.
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ * Copyright (C) 2005-2006 by Texas Instruments
+ *
+ * Derived from the Texas Instruments Inventra Controller Driver for Linux.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include <asm/io.h>
+#include <asm/ip5000.h>
+#include "musb_core.h"
+
+void musb_platform_enable(struct musb *musb)
+{
+}
+void musb_platform_disable(struct musb *musb)
+{
+}
+
+int musb_platform_set_mode(struct musb *musb, u8 musb_mode) {
+	return 0;
+}
+
+static void ip5k_usb_hcd_vbus_power(struct musb *musb, int is_on, int sleeping)
+{
+}
+
+static void ip5k_usb_hcd_set_vbus(struct musb *musb, int is_on)
+{
+	u8		devctl;
+	/* HDRC controls CPEN, but beware current surges during device
+	 * connect.  They can trigger transient overcurrent conditions
+	 * that must be ignored.
+	 */
+
+	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
+
+	if (is_on) {
+		musb->is_active = 1;
+		musb->xceiv.default_a = 1;
+		musb->xceiv.state = OTG_STATE_A_WAIT_VRISE;
+		devctl |= MUSB_DEVCTL_SESSION;
+
+		MUSB_HST_MODE(musb);
+	} else {
+		musb->is_active = 0;
+
+		/* NOTE:  we're skipping A_WAIT_VFALL -> A_IDLE and
+		 * jumping right to B_IDLE...
+		 */
+
+		musb->xceiv.default_a = 0;
+		musb->xceiv.state = OTG_STATE_B_IDLE;
+		devctl &= ~MUSB_DEVCTL_SESSION;
+
+		MUSB_DEV_MODE(musb);
+	}
+	musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
+
+	DBG(1, "VBUS %s, devctl %02x "
+		/* otg %3x conf %08x prcm %08x */ "\n",
+		otg_state_string(musb),
+		musb_readb(musb->mregs, MUSB_DEVCTL));
+}
+static int ip5k_usb_hcd_set_power(struct otg_transceiver *x, unsigned mA)
+{
+	return 0;
+}
+
+static int musb_platform_resume(struct musb *musb);
+
+int __init musb_platform_init(struct musb *musb)
+{
+
+#ifdef CONFIG_UBICOM32_V4
+	u32_t chip_id;
+	asm volatile (
+		      "move.4	%0, CHIP_ID	\n\t"
+		      : "=r" (chip_id)
+	);
+	if (chip_id == 0x30001) {
+		*((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 30);
+		udelay(1);
+		*((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 31);
+	} else {
+		*((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 17);
+		udelay(1);
+		*((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_TEST)) &= ~(1 << 14);
+	}
+#endif
+
+	 *((u32_t *)(GENERAL_CFG_BASE + GEN_USB_PHY_CFG)) |= ((1 << 14) | (1 <<15));
+
+	/* The i-clk is AUTO gated. Hence there is no need
+	 * to disable it until the driver is shutdown */
+
+	clk_enable(musb->clock);
+	musb_platform_resume(musb);
+
+	ip5k_usb_hcd_vbus_power(musb, musb->board_mode == MUSB_HOST, 1);
+
+	if (is_host_enabled(musb))
+		musb->board_set_vbus = ip5k_usb_hcd_set_vbus;
+	if (is_peripheral_enabled(musb))
+		musb->xceiv.set_power = ip5k_usb_hcd_set_power;
+
+	return 0;
+}
+
+
+int musb_platform_suspend(struct musb *musb)
+{
+	return 0;
+}
+int musb_platform_resume(struct musb *musb)
+{
+	return 0;
+}
+
+int musb_platform_exit(struct musb *musb)
+{
+	ip5k_usb_hcd_vbus_power(musb, 0 /*off*/, 1);
+	musb_platform_suspend(musb);
+	return 0;
+}

target/linux/ubicom32/files/drivers/video/backlight/ubicom32bl.c

@@ -0,0 +1,399 @@
+/*
+ * drivers/video/backlight/ubicom32bl.c
+ *	Backlight driver for the Ubicom32 platform
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/backlight.h>
+#include <linux/fb.h>
+
+#include <asm/ubicom32bl.h>
+#include <asm/ip5000.h>
+
+#define DRIVER_NAME			"ubicom32bl"
+#define UBICOM32BL_MAX_BRIGHTNESS	255
+
+struct ubicom32bl_data {
+	/*
+	 * Pointer to the platform data structure.  Keep this around since we need values
+	 * from it to set the backlight intensity.
+	 */
+	const struct ubicom32bl_platform_data	*pdata;
+
+	/*
+	 * Backlight device, we have to save this for use when we remove ourselves.
+	 */
+	struct backlight_device			*bldev;
+
+	/*
+	 * Current intensity, used for get_intensity.
+	 */
+	int					cur_intensity;
+
+	/*
+	 * Init function for PWM
+	 */
+	int (*init_fn)(struct ubicom32bl_data *);
+
+	/*
+	 * Set intensity function depending on the backlight type
+	 */
+	int (*set_intensity_fn)(struct ubicom32bl_data *, int);
+};
+
+/*
+ * ubicom32bl_set_intensity_gpio
+ */
+static int ubicom32bl_set_intensity_gpio(struct ubicom32bl_data *ud, int intensity)
+{
+	ud->cur_intensity = intensity ? 255 : 0;
+
+	if (intensity) {
+		// set gpio
+		return 0;
+	}
+
+	// clear gpio
+	return 0;
+}
+
+/*
+ * ubicom32bl_set_intensity_hw
+ */
+static int ubicom32bl_set_intensity_hw(struct ubicom32bl_data *ud, int intensity)
+{
+	u16_t period = ud->pdata->pwm_period;
+	u16_t duty;
+
+	/*
+	 * Calculate the new duty cycle
+	 */
+	duty = (period * intensity) / (UBICOM32BL_MAX_BRIGHTNESS + 1);
+
+	/*
+	 * Set the new duty cycle
+	 */
+	switch (ud->pdata->pwm_channel) {
+	case 0:
+		/*
+		 * Channel 0 is in the lower half of PORT C ctl0 and ctl1
+		 */
+		UBICOM32_IO_PORT(RC)->ctl1 = (ud->pdata->pwm_period << 16) | duty;
+		break;
+
+	case 1:
+		/*
+		 * Channel 1 is in the upper half of PORT C ctl0 and ctl2
+		 */
+		UBICOM32_IO_PORT(RC)->ctl2 = (ud->pdata->pwm_period << 16) | duty;
+		break;
+
+	case 2:
+		/*
+		 * Channel 2 is in PORT H ctl0 and ctl1
+		 */
+		UBICOM32_IO_PORT(RH)->ctl1 = (ud->pdata->pwm_period << 16) | duty;
+		break;
+	}
+
+	ud->cur_intensity = intensity;
+
+	return 0;
+}
+
+/*
+ * ubicom32bl_set_intensity
+ */
+static int ubicom32bl_set_intensity(struct backlight_device *bd)
+{
+	struct ubicom32bl_data *ud = (struct ubicom32bl_data *)bl_get_data(bd);
+	int intensity = bd->props.brightness;
+
+	/*
+	 * If we're blanked the the intensity doesn't matter.
+	 */
+	if ((bd->props.power != FB_BLANK_UNBLANK) || (bd->props.fb_blank != FB_BLANK_UNBLANK)) {
+		intensity = 0;
+	}
+
+	/*
+	 * Check for inverted backlight.
+	 */
+	if (ud->pdata->invert) {
+		intensity = UBICOM32BL_MAX_BRIGHTNESS - intensity;
+	}
+
+	if (ud->set_intensity_fn) {
+		return ud->set_intensity_fn(ud, intensity);
+	}
+
+	return -ENXIO;
+}
+
+/*
+ * ubicom32bl_get_intensity
+ *	Return the current intensity of the backlight.
+ */
+static int ubicom32bl_get_intensity(struct backlight_device *bd)
+{
+	struct ubicom32bl_data *ud = (struct ubicom32bl_data *)bl_get_data(bd);
+
+	return ud->cur_intensity;
+}
+
+/*
+ * ubicom32bl_init_hw_pwm
+ *	Set the appropriate PWM registers
+ */
+static int ubicom32bl_init_hw_pwm(struct ubicom32bl_data *ud)
+{
+	/*
+	 * bit 13: enable
+	 */
+	u16_t pwm_cfg = (1 << 13) | (ud->pdata->pwm_prescale << 8) ;
+
+	switch (ud->pdata->pwm_channel) {
+	case 0:
+		/*
+		 * Channel 0 is in the lower half of PORT C ctl0 and ctl1 (PA5)
+		 */
+		UBICOM32_IO_PORT(RC)->ctl0 &= ~0xFFFF;
+		UBICOM32_IO_PORT(RC)->ctl0 |= pwm_cfg;
+		UBICOM32_IO_PORT(RC)->ctl1 = ud->pdata->pwm_period << 16;
+
+		/*
+		 * If the port function is not set, set it to GPIO/PWM
+		 */
+		if (!UBICOM32_IO_PORT(RA)->function) {
+			UBICOM32_IO_PORT(RA)->function = 3;
+		}
+		break;
+
+	case 1:
+		/*
+		 * Channel 1 is in the upper half of PORT C ctl0 and ctl2 (PE4)
+		 */
+		UBICOM32_IO_PORT(RC)->ctl0 &= ~0xFFFF0000;
+		UBICOM32_IO_PORT(RC)->ctl0 |= (pwm_cfg << 16);
+		UBICOM32_IO_PORT(RC)->ctl2 = ud->pdata->pwm_period << 16;
+
+		/*
+		 * If the port function is not set, set it to GPIO/ExtIOInt
+		 */
+		if (!UBICOM32_IO_PORT(RE)->function) {
+			UBICOM32_IO_PORT(RE)->function = 3;
+		}
+		break;
+
+	case 2:
+		/*
+		 * Channel 2 is in PORT H ctl0 and ctl1 (PD0)
+		 */
+		UBICOM32_IO_PORT(RH)->ctl0 &= ~0xFFFF0000;
+		UBICOM32_IO_PORT(RH)->ctl0 = pwm_cfg;
+		UBICOM32_IO_PORT(RH)->ctl1 = ud->pdata->pwm_period << 16;
+
+		/*
+		 * If the port function is not set, set it to GPIO
+		 */
+		if (!UBICOM32_IO_PORT(RD)->function) {
+			UBICOM32_IO_PORT(RD)->function = 3;
+		}
+		break;
+	}
+
+	return 0;
+}
+
+/*
+ * ubicom32bl_init_gpio
+ *	Allocate the appropriate GPIO
+ */
+static int ubicom32bl_init_gpio(struct ubicom32bl_data *ud)
+{
+	return 0;
+}
+
+static struct backlight_ops ubicom32bl_ops = {
+	.get_brightness = ubicom32bl_get_intensity,
+	.update_status  = ubicom32bl_set_intensity,
+};
+
+/*
+ * ubicom32bl_probe
+ */
+static int ubicom32bl_probe(struct platform_device *pdev)
+{
+	const struct ubicom32bl_platform_data *pdata = pdev->dev.platform_data;
+	struct ubicom32bl_data *ud;
+	struct backlight_device *bldev;
+	int retval;
+
+	/*
+	 * Check to see if we have any platform data, if we don't then the backlight is not
+	 * configured on this device.
+	 */
+	if (!pdata) {
+		return -ENODEV;
+	}
+
+	/*
+	 * Allocate our private data
+	 */
+	ud = kzalloc(sizeof(struct ubicom32bl_data), GFP_KERNEL);
+	if (!ud) {
+		return -ENOMEM;
+	}
+
+	ud->pdata = pdata;
+
+	/*
+	 * Check to see that the platform data is valid for this driver
+	 */
+	switch (pdata->type) {
+	case UBICOM32BL_TYPE_PWM:
+		{
+			/*
+			 * Make sure we have a PWM peripheral
+			 */
+			u32_t chipid;
+			asm volatile (
+				"move.4         %0, CHIP_ID     \n\t"
+				: "=r" (chipid)
+			);
+			if (chipid != 0x00030001) {
+				retval = -ENODEV;
+				goto fail;
+			}
+
+			if (pdata->pwm_channel > 3) {
+				retval = -ENODEV;
+				goto fail;
+			}
+			if (pdata->pwm_prescale > 16) {
+				retval = -EINVAL;
+				goto fail;
+			}
+
+			ud->init_fn = ubicom32bl_init_hw_pwm;
+			ud->set_intensity_fn = ubicom32bl_set_intensity_hw;
+			break;
+		}
+
+	case UBICOM32BL_TYPE_PWM_HRT:
+		// For now, PWM HRT devices are treated as binary lights.
+
+	case UBICOM32BL_TYPE_BINARY:
+		ud->init_fn = ubicom32bl_init_gpio;
+		ud->set_intensity_fn = ubicom32bl_set_intensity_gpio;
+		break;
+	}
+
+	/*
+	 * Register our backlight device
+	 */
+	bldev = backlight_device_register(DRIVER_NAME, &pdev->dev, ud, &ubicom32bl_ops);
+	if (IS_ERR(bldev)) {
+		retval = PTR_ERR(bldev);
+		goto fail;
+	}
+
+	ud->bldev = bldev;
+	ud->cur_intensity = pdata->default_intensity;
+	platform_set_drvdata(pdev, ud);
+
+	/*
+	 * Start up the backlight at the prescribed default intensity
+	 */
+	bldev->props.power = FB_BLANK_UNBLANK;
+	bldev->props.max_brightness = UBICOM32BL_MAX_BRIGHTNESS;
+	bldev->props.brightness = pdata->default_intensity;
+
+	if (ud->init_fn) {
+		if (ud->init_fn(ud) != 0) {
+			retval = -ENODEV;
+			backlight_device_unregister(ud->bldev);
+			goto fail;
+		}
+	}
+	ubicom32bl_set_intensity(bldev);
+
+	printk(KERN_INFO DRIVER_NAME ": Backlight driver started\n");
+
+	return 0;
+
+fail:
+	platform_set_drvdata(pdev, NULL);
+	kfree(ud);
+	return retval;
+}
+
+/*
+ * ubicom32bl_remove
+ */
+static int __exit ubicom32bl_remove(struct platform_device *pdev)
+{
+	struct ubicom32bl_data *ud = platform_get_drvdata(pdev);
+
+	backlight_device_unregister(ud->bldev);
+	platform_set_drvdata(pdev, NULL);
+	kfree(ud);
+
+	return 0;
+}
+
+static struct platform_driver ubicom32bl_driver = {
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner = THIS_MODULE,
+	},
+
+	.remove = __exit_p(ubicom32bl_remove),
+};
+
+/*
+ * ubicom32bl_init
+ */
+static int __init ubicom32bl_init(void)
+{
+	return platform_driver_probe(&ubicom32bl_driver, ubicom32bl_probe);
+}
+module_init(ubicom32bl_init);
+
+/*
+ * ubicom32bl_exit
+ */
+static void __exit ubicom32bl_exit(void)
+{
+	platform_driver_unregister(&ubicom32bl_driver);
+}
+module_exit(ubicom32bl_exit);
+
+MODULE_AUTHOR("Patrick Tjin <@ubicom.com>");
+MODULE_DESCRIPTION("Ubicom32 backlight driver");
+MODULE_LICENSE("GPL");

target/linux/ubicom32/files/drivers/video/backlight/ubicom32lcd.c

@@ -0,0 +1,372 @@
+/*
+ * drivers/video/ubicom32lcd.c
+ *	LCD initilization code
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+#include <asm/ip5000.h>
+#include <asm/gpio.h>
+#include <asm/ubicom32lcd.h>
+
+#include "ubicom32lcd.h"
+
+#define DRIVER_NAME			"ubicom32lcd"
+
+struct ubicom32lcd_data {
+	const struct ubicom32lcd_panel	*panel;
+
+	int				pin_cs;
+	int				pin_rd;
+	int				pin_rs;
+	int				pin_wr;
+	int				pin_reset;
+	struct ubicom32_io_port		*port_data;
+	int				data_shift;
+};
+
+/*
+ * ubicom32lcd_write
+ *	Performs a write cycle on the bus (assumes CS asserted, RD & WR set)
+ */
+static void ubicom32lcd_write(struct ubicom32lcd_data *ud, int command, u16 data)
+{
+	if (command) {
+		UBICOM32_GPIO_SET_PIN_LOW(ud->pin_rs);
+	} else {
+		UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_rs);
+	}
+
+	asm volatile (
+		"or.4	4(%[port]), 4(%[port]), %[mask]	\n\t"
+		"not.4	%[mask], %[mask]		\n\t"
+		"and.4	8(%[port]), 8(%[port]), %[mask]	\n\t"
+		"or.4	8(%[port]), 8(%[port]), %[cmd]	\n\t"
+		:
+		: [port] "a" (ud->port_data),
+		  [mask] "d" (0xFFFF << ud->data_shift),
+		  [cmd] "d" (data << ud->data_shift)
+		: "cc"
+	);
+
+	UBICOM32_GPIO_SET_PIN_LOW(ud->pin_wr);
+
+	//ndelay(50);
+	udelay(1);
+
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_wr);
+
+	udelay(1);
+	//ndelay(50);
+}
+
+/*
+ * ubicom32lcd_read_data
+ *	Performs a read cycle on the bus (assumes CS asserted, RD & WR set)
+ */
+static u16 ubicom32lcd_read_data(struct ubicom32lcd_data *ud)
+{
+	u32_t data;
+
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_rs);
+
+	asm volatile (
+		"and.4	4(%[port]), 4(%[port]), %[mask]\n\t"
+		:
+		: [port] "a" (ud->port_data),
+		  [mask] "d" (~(0xFFFF << ud->data_shift))
+		: "cc"
+	);
+
+	UBICOM32_GPIO_SET_PIN_LOW(ud->pin_rd);
+
+	ndelay(300);
+
+	asm volatile (
+		"lsr.4	%[data], 12(%[port]), %[shamt]	\n\t"
+		"and.4	%[data], %[data], %[mask]	\n\t"
+		: [data] "=d" (data)
+		: [port] "a" (ud->port_data),
+		  [mask] "d" (0xFFFF),
+		  [shamt] "d" (ud->data_shift)
+		: "cc"
+	);
+
+	ndelay(200);
+
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_rd);
+
+	ndelay(500);
+
+	return data;
+}
+
+/*
+ * ubicom32lcd_execute
+ *	Executes a script for performing operations on the LCD (assumes CS set)
+ */
+static void ubicom32lcd_execute(struct ubicom32lcd_data *ud, const struct ubicom32lcd_step *script)
+{
+	while (1) {
+		switch (script->op) {
+		case LCD_STEP_CMD:
+			ubicom32lcd_write(ud, 1, script->cmd);
+			break;
+
+		case LCD_STEP_DATA:
+			ubicom32lcd_write(ud, 0, script->data);
+			break;
+
+		case LCD_STEP_CMD_DATA:
+			ubicom32lcd_write(ud, 1, script->cmd);
+			ubicom32lcd_write(ud, 0, script->data);
+			break;
+
+		case LCD_STEP_SLEEP:
+			udelay(script->data);
+			break;
+
+		case LCD_STEP_DONE:
+			return;
+		}
+		script++;
+	}
+}
+
+/*
+ * ubicom32lcd_goto
+ *	Places the gram pointer at a specific X, Y address
+ */
+static void ubicom32lcd_goto(struct ubicom32lcd_data *ud, int x, int y)
+{
+	ubicom32lcd_write(ud, 1, ud->panel->horz_reg);
+	ubicom32lcd_write(ud, 0, x);
+	ubicom32lcd_write(ud, 1, ud->panel->vert_reg);
+	ubicom32lcd_write(ud, 0, y);
+	ubicom32lcd_write(ud, 1, ud->panel->gram_reg);
+}
+
+/*
+ * ubicom32lcd_panel_init
+ *	Initializes the lcd panel.
+ */
+static int ubicom32lcd_panel_init(struct ubicom32lcd_data *ud)
+{
+	u16 id;
+
+	UBICOM32_GPIO_SET_PIN_LOW(ud->pin_reset);
+	UBICOM32_GPIO_SET_PIN_OUTPUT(ud->pin_reset);
+	UBICOM32_GPIO_ENABLE(ud->pin_reset);
+
+	asm volatile (
+		"or.4	0x50(%[port]), 0x50(%[port]), %[mask]	\n\t"
+		"not.4	%[mask], %[mask]			\n\t"
+		"and.4	0x04(%[port]), 0x04(%[port]), %[mask]	\n\t"
+		:
+		: [port] "a" (ud->port_data),
+		  [mask] "d" (0xFFFF << ud->data_shift)
+		: "cc"
+	);
+
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_rs);
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_rd);
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_wr);
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_cs);
+
+	UBICOM32_GPIO_SET_PIN_OUTPUT(ud->pin_rs);
+	UBICOM32_GPIO_SET_PIN_OUTPUT(ud->pin_rd);
+	UBICOM32_GPIO_SET_PIN_OUTPUT(ud->pin_wr);
+	UBICOM32_GPIO_SET_PIN_OUTPUT(ud->pin_cs);
+
+	UBICOM32_GPIO_ENABLE(ud->pin_rs);
+	UBICOM32_GPIO_ENABLE(ud->pin_rd);
+	UBICOM32_GPIO_ENABLE(ud->pin_wr);
+	UBICOM32_GPIO_ENABLE(ud->pin_cs);
+
+	udelay(20);
+
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_reset);
+
+	udelay(20);
+
+	UBICOM32_GPIO_SET_PIN_LOW(ud->pin_cs);
+
+	id = ubicom32lcd_read_data(ud);
+
+	/*
+	 * We will try to figure out what kind of panel we have if we were not told.
+	 */
+	if (!ud->panel) {
+		const struct ubicom32lcd_panel **p = ubicom32lcd_panels;
+		while (*p) {
+			if ((*p)->id && ((*p)->id == id)) {
+				break;
+			}
+			p++;
+		}
+		if (!*p) {
+			printk(KERN_WARNING DRIVER_NAME ":Could not find compatible panel, id=%x\n", id);
+			return -ENODEV;
+		}
+		ud->panel = *p;
+	}
+
+	/*
+	 * Make sure panel ID matches if we were supplied a panel type
+	 */
+	if (ud->panel->id && (ud->panel->id != id)) {
+		UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_cs);
+
+		return -ENODEV;
+	}
+
+	ubicom32lcd_execute(ud, ud->panel->init_seq);
+
+	ubicom32lcd_goto(ud, 0, 0);
+
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_cs);
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_rd);
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_wr);
+	UBICOM32_GPIO_SET_PIN_HIGH(ud->pin_rs);
+
+	printk(KERN_INFO DRIVER_NAME ": Initialized panel %s\n", ud->panel->desc);
+
+	return 0;
+}
+
+/*
+ * ubicom32lcd_probe
+ */
+static int ubicom32lcd_probe(struct platform_device *pdev)
+{
+	const struct ubicom32lcd_platform_data *pdata = pdev->dev.platform_data;
+	struct ubicom32lcd_data *ud;
+	int retval;
+
+	/*
+	 * Allocate our private data
+	 */
+	ud = kzalloc(sizeof(struct ubicom32lcd_data), GFP_KERNEL);
+	if (!ud) {
+		return -ENOMEM;
+	}
+
+	if (pdata) {
+		ud->pin_cs = pdata->pin_cs;
+		ud->pin_rd = pdata->pin_rd;
+		ud->pin_wr = pdata->pin_wr;
+		ud->pin_rs = pdata->pin_rs;
+		ud->pin_reset = pdata->pin_reset;
+		ud->port_data = pdata->port_data;
+		ud->data_shift = pdata->data_shift;
+	} else {
+		/*
+		 * Defaults
+		 */
+		ud->pin_cs = GPIO_RD_4;
+		ud->pin_rd = GPIO_RD_5;
+		ud->pin_rs = GPIO_RD_3;
+		ud->pin_wr = GPIO_RD_2;
+		ud->pin_reset = GPIO_RD_7;
+		ud->port_data = (struct ubicom32_io_port *)RI;
+		ud->data_shift = 0;
+	}
+
+	/*
+	 * Initialize the display
+	 */
+	retval = ubicom32lcd_panel_init(ud);
+	if (retval) {
+		kfree(ud);
+		return retval;
+	}
+
+	printk(KERN_INFO DRIVER_NAME ": LCD initialized\n");
+
+	return 0;
+}
+
+/*
+ * ubicom32lcd_remove
+ */
+static int __exit ubicom32lcd_remove(struct platform_device *pdev)
+{
+	struct ubicom32lcd_data *ud = platform_get_drvdata(pdev);
+
+	kfree(ud);
+
+	return 0;
+}
+
+static struct platform_driver ubicom32lcd_driver = {
+	.probe          = ubicom32lcd_probe,
+	.remove         = ubicom32lcd_remove,
+
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner = THIS_MODULE,
+	},
+
+	.remove = __exit_p(ubicom32lcd_remove),
+};
+
+static struct platform_device *ubicom32lcd_device;
+
+/*
+ * ubicom32lcd_init
+ */
+static int __init ubicom32lcd_init(void)
+{
+	int res;
+
+	res = platform_driver_register(&ubicom32lcd_driver);
+	if (res == 0) {
+		ubicom32lcd_device = platform_device_alloc(DRIVER_NAME, 0);
+		if (ubicom32lcd_device) {
+			res = platform_device_add(ubicom32lcd_device);
+		} else {
+			res = -ENOMEM;
+		}
+		if (res) {
+			platform_device_put(ubicom32lcd_device);
+			platform_driver_unregister(&ubicom32lcd_driver);
+		}
+	}
+	return res;
+}
+module_init(ubicom32lcd_init);
+
+/*
+ * ubicom32lcd_exit
+ */
+static void __exit ubicom32lcd_exit(void)
+{
+	platform_device_unregister(ubicom32lcd_device);
+	platform_driver_unregister(&ubicom32lcd_driver);
+}
+module_exit(ubicom32lcd_exit);
+
+MODULE_AUTHOR("Patrick Tjin <@ubicom.com>");
+MODULE_DESCRIPTION("Ubicom32 LCD driver");
+MODULE_LICENSE("GPL");

target/linux/ubicom32/files/drivers/video/backlight/ubicom32lcd.h

@@ -0,0 +1,546 @@
+/*
+ * ubicom32lcd.h
+ *	Ubicom32 lcd panel drivers
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * This Ubicom32 library is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This Ubicom32 library is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _UBICOM32LCD_H_
+#define _UBICOM32LCD_H_
+
+enum ubicom32lcd_op {
+	/*
+	 * Sleep for (data) ms
+	 */
+	LCD_STEP_SLEEP,
+
+	/*
+	 * Execute write of command
+	 */
+	LCD_STEP_CMD,
+
+	/*
+	 * Execute write of data
+	 */
+	LCD_STEP_DATA,
+
+	/*
+	 * Execute write of command/data
+	 */
+	LCD_STEP_CMD_DATA,
+
+	/*
+	 * Script done
+	 */
+	LCD_STEP_DONE,
+};
+
+struct ubicom32lcd_step {
+	enum ubicom32lcd_op		op;
+	u16				cmd;
+	u16				data;
+};
+
+struct ubicom32lcd_panel {
+	const struct ubicom32lcd_step	*init_seq;
+	const char			*desc;
+
+	u32				xres;
+	u32				yres;
+	u32				stride;
+	u32				flags;
+
+	u16				id;
+	u16				horz_reg;
+	u16				vert_reg;
+	u16				gram_reg;
+};
+
+#ifdef CONFIG_LCD_UBICOM32_CFAF240320KTTS
+static const struct ubicom32lcd_step cfaf240320ktts_init_0[] = {
+	{LCD_STEP_CMD_DATA, 0x0001, 0x0000,}, // Driver Output Control Register (R01h)		Page 14, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0002, 0x0700,}, // LCD Driving Waveform Control (R02h)		Page 15, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0003, 0x50A0,}, // Entry Mode (R03h)				0 degrees
+	{LCD_STEP_CMD_DATA, 0x0004, 0x0000,}, // Scaling Control register (R04h)		Page 16, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0008, 0x0207,}, // Display Control 2 (R08h)			Page 17, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0009, 0x0000,}, // Display Control 3 (R09h)			Page 18, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x000A, 0x0000,}, // Frame Cycle Control (R0Ah)			Page 19, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x000C, 0x0000,}, // External Display Interface Control 1 (R0Ch)	Page 20, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x000D, 0x0000,}, // Frame Maker Position (R0Dh)			Page 21, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x000F, 0x0000,}, // External Display Interface Control 2 (R0Fh)	Page 21, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0010, 0x0000,}, // Power Control 1 (R10h)				Page 22, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0011, 0x0007,}, // Power Control 2 (R11h)				Page 23, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0012, 0x0000,}, // Power Control 3 (R12h)				Page 24, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0013, 0x0000,}, // Power Control 4 (R13h)				Page 25, SPFD5408B Datasheet
+	{LCD_STEP_SLEEP, 0, 200},
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0101,}, // Display Control (R07h)				Page 16, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0010, 0x12B0,}, // Power Control 1 (R10h)				Page 22, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0011, 0x0007,}, // Power Control 2 (R11h)				Page 23, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0012, 0x01BB,}, // Power Control 3 (R12h)				Page 24, SPFD5408B Datasheet
+	{LCD_STEP_SLEEP, 0, 50},
+	{LCD_STEP_CMD_DATA, 0x0013, 0x1300,}, // Power Control 4 (R13h)				Page 25, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0029, 0x0010,}, // NVM read data 2 (R29h)				Page 30, SPFD5408B Datasheet
+	{LCD_STEP_SLEEP, 0, 50},
+	{LCD_STEP_CMD_DATA, 0x0030, 0x000A,}, // Gamma Control 1       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0031, 0x1326,}, // Gamma Control 2       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0032, 0x0A29,}, // Gamma Control 3       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0033, 0x290A,}, // Gamma Control 4       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0034, 0x2613,}, // Gamma Control 5       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0035, 0x0A0A,}, // Gamma Control 6       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0036, 0x1E03,}, // Gamma Control 7       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0037, 0x031E,}, // Gamma Control 8       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0038, 0x0706,}, // Gamma Control 9       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0039, 0x0303,}, // Gamma Control 10      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003A, 0x0E04,}, // Gamma Control 11      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003B, 0x0E01,}, // Gamma Control 12      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003C, 0x010E,}, // Gamma Control 13      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003D, 0x040E,}, // Gamma Control 14      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003E, 0x0303,}, // Gamma Control 15      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003F, 0x0607,}, // Gamma Control 16      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0050, 0x0000,}, // Window Horizontal RAM Address Start (R50h)	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0051, 0x00EF,}, // Window Horizontal RAM Address End (R51h)	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0052, 0x0000,}, // Window Vertical RAM Address Start (R52h)	Page 33, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0053, 0x013F,}, // Window Vertical RAM Address End (R53h)		Page 33, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0060, 0x2700,}, // Driver Output Control (R60h)			Page 33, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0061, 0x0001,}, // Driver Output Control (R61h)			Page 35, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x006A, 0x0000,}, // Vertical Scroll Control (R6Ah)			Page 35, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0080, 0x0000,}, // Display Position - Partial Display 1 (R80h)	Page 35, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0081, 0x0000,}, // RAM Address Start - Partial Display 1 (R81h)	Page 35, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0082, 0x0000,}, // RAM Address End - Partial Display 1 (R82h)	Page 36, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0083, 0x0000,}, // Display Position - Partial Display 2 (R83h)	Page 36, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0084, 0x0000,}, // RAM Address Start - Partial Display 2 (R84h)	Page 36, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0085, 0x0000,}, // RAM Address End - Partial Display 2 (R85h)	Page 36, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0090, 0x0010,}, // Panel Interface Control 1 (R90h)		Page 36, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0092, 0x0000,}, // Panel Interface Control 2 (R92h)		Page 37, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0093, 0x0103,}, // Panel Interface control 3 (R93h)		Page 38, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0095, 0x0210,}, // Panel Interface control 4 (R95h)		Page 38, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0097, 0x0000,}, // Panel Interface Control 5 (R97h)		Page 40, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0098, 0x0000,}, // Panel Interface Control 6 (R98h)		Page 41, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0173,}, // Display Control (R07h)				Page 16, SPFD5408B Datasheet
+	{LCD_STEP_DONE, 0, 0},
+};
+
+const struct ubicom32lcd_panel cfaf240320ktts_0 = {
+	.desc		= "CFAF240320KTTS",
+	.init_seq	= cfaf240320ktts_init_0,
+	.horz_reg	= 0x20,
+	.vert_reg	= 0x21,
+	.gram_reg	= 0x22,
+	.xres		= 240,
+	.yres		= 320,
+	.stride		= 240,
+	.id		= 0x5408,
+};
+#endif
+
+#ifdef CONFIG_LCD_UBICOM32_CFAF240320KTTS_180
+static const struct ubicom32lcd_step cfaf240320ktts_init_180[] = {
+	{LCD_STEP_CMD_DATA, 0x0001, 0x0000,}, // Driver Output Control Register (R01h)		Page 14, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0002, 0x0700,}, // LCD Driving Waveform Control (R02h)		Page 15, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0003, 0x5000,}, // Entry Mode (R03h)				180 degrees
+	{LCD_STEP_CMD_DATA, 0x0004, 0x0000,}, // Scaling Control register (R04h)		Page 16, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0008, 0x0207,}, // Display Control 2 (R08h)			Page 17, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0009, 0x0000,}, // Display Control 3 (R09h)			Page 18, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x000A, 0x0000,}, // Frame Cycle Control (R0Ah)			Page 19, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x000C, 0x0000,}, // External Display Interface Control 1 (R0Ch)	Page 20, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x000D, 0x0000,}, // Frame Maker Position (R0Dh)			Page 21, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x000F, 0x0000,}, // External Display Interface Control 2 (R0Fh)	Page 21, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0010, 0x0000,}, // Power Control 1 (R10h)				Page 22, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0011, 0x0007,}, // Power Control 2 (R11h)				Page 23, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0012, 0x0000,}, // Power Control 3 (R12h)				Page 24, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0013, 0x0000,}, // Power Control 4 (R13h)				Page 25, SPFD5408B Datasheet
+	{LCD_STEP_SLEEP, 0, 200},
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0101,}, // Display Control (R07h)				Page 16, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0010, 0x12B0,}, // Power Control 1 (R10h)				Page 22, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0011, 0x0007,}, // Power Control 2 (R11h)				Page 23, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0012, 0x01BB,}, // Power Control 3 (R12h)				Page 24, SPFD5408B Datasheet
+	{LCD_STEP_SLEEP, 0, 50},
+	{LCD_STEP_CMD_DATA, 0x0013, 0x1300,}, // Power Control 4 (R13h)				Page 25, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0029, 0x0010,}, // NVM read data 2 (R29h)				Page 30, SPFD5408B Datasheet
+	{LCD_STEP_SLEEP, 0, 50},
+	{LCD_STEP_CMD_DATA, 0x0030, 0x000A,}, // Gamma Control 1       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0031, 0x1326,}, // Gamma Control 2       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0032, 0x0A29,}, // Gamma Control 3       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0033, 0x290A,}, // Gamma Control 4       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0034, 0x2613,}, // Gamma Control 5       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0035, 0x0A0A,}, // Gamma Control 6       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0036, 0x1E03,}, // Gamma Control 7       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0037, 0x031E,}, // Gamma Control 8       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0038, 0x0706,}, // Gamma Control 9       			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0039, 0x0303,}, // Gamma Control 10      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003A, 0x0E04,}, // Gamma Control 11      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003B, 0x0E01,}, // Gamma Control 12      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003C, 0x010E,}, // Gamma Control 13      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003D, 0x040E,}, // Gamma Control 14      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003E, 0x0303,}, // Gamma Control 15      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x003F, 0x0607,}, // Gamma Control 16      			 	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0050, 0x0000,}, // Window Horizontal RAM Address Start (R50h)	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0051, 0x00EF,}, // Window Horizontal RAM Address End (R51h)	Page 32, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0052, 0x0000,}, // Window Vertical RAM Address Start (R52h)	Page 33, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0053, 0x013F,}, // Window Vertical RAM Address End (R53h)		Page 33, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0060, 0x2700,}, // Driver Output Control (R60h)			Page 33, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0061, 0x0001,}, // Driver Output Control (R61h)			Page 35, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x006A, 0x0000,}, // Vertical Scroll Control (R6Ah)			Page 35, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0080, 0x0000,}, // Display Position - Partial Display 1 (R80h)	Page 35, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0081, 0x0000,}, // RAM Address Start - Partial Display 1 (R81h)	Page 35, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0082, 0x0000,}, // RAM Address End - Partial Display 1 (R82h)	Page 36, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0083, 0x0000,}, // Display Position - Partial Display 2 (R83h)	Page 36, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0084, 0x0000,}, // RAM Address Start - Partial Display 2 (R84h)	Page 36, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0085, 0x0000,}, // RAM Address End - Partial Display 2 (R85h)	Page 36, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0090, 0x0010,}, // Panel Interface Control 1 (R90h)		Page 36, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0092, 0x0000,}, // Panel Interface Control 2 (R92h)		Page 37, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0093, 0x0103,}, // Panel Interface control 3 (R93h)		Page 38, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0095, 0x0210,}, // Panel Interface control 4 (R95h)		Page 38, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0097, 0x0000,}, // Panel Interface Control 5 (R97h)		Page 40, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0098, 0x0000,}, // Panel Interface Control 6 (R98h)		Page 41, SPFD5408B Datasheet
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0173,}, // Display Control (R07h)				Page 16, SPFD5408B Datasheet
+	{LCD_STEP_DONE, 0, 0},
+};
+
+const struct ubicom32lcd_panel cfaf240320ktts_180 = {
+	.desc		= "CFAF240320KTTS 180",
+	.init_seq	= cfaf240320ktts_init_180,
+	.horz_reg	= 0x20,
+	.vert_reg	= 0x21,
+	.gram_reg	= 0x22,
+	.xres		= 240,
+	.yres		= 320,
+	.stride		= 240,
+	.id		= 0x5408,
+};
+#endif
+
+#ifdef CONFIG_LCD_UBICOM32_TFT2N0369E_P
+static const struct ubicom32lcd_step tft2n0369ep_init[] = {
+	{LCD_STEP_CMD_DATA, 0x0028, 0x0006},
+	{LCD_STEP_CMD_DATA, 0x0000, 0x0001},
+	{LCD_STEP_SLEEP, 0, 15},
+	{LCD_STEP_CMD_DATA, 0x002B, 0x9532},
+	{LCD_STEP_CMD_DATA, 0x0003, 0xAAAC},
+	{LCD_STEP_CMD_DATA, 0x000C, 0x0002},
+	{LCD_STEP_CMD_DATA, 0x000D, 0x000A},
+	{LCD_STEP_CMD_DATA, 0x000E, 0x2C00},
+	{LCD_STEP_CMD_DATA, 0x001E, 0x00AA},
+	{LCD_STEP_CMD_DATA, 0x0025, 0x8000},
+	{LCD_STEP_SLEEP, 0, 15},
+	{LCD_STEP_CMD_DATA, 0x0001, 0x2B3F},
+	{LCD_STEP_CMD_DATA, 0x0002, 0x0600},
+	{LCD_STEP_CMD_DATA, 0x0010, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0011, 0x6030},
+	{LCD_STEP_SLEEP, 0, 20},
+	{LCD_STEP_CMD_DATA, 0x0005, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0006, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0016, 0xEF1C},
+	{LCD_STEP_CMD_DATA, 0x0017, 0x0003},
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0233},
+	{LCD_STEP_CMD_DATA, 0x000B, 0x5312},
+	{LCD_STEP_CMD_DATA, 0x000F, 0x0000},
+	{LCD_STEP_SLEEP, 0, 20},
+	{LCD_STEP_CMD_DATA, 0x0041, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0042, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0048, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0049, 0x013F},
+	{LCD_STEP_CMD_DATA, 0x0044, 0xEF00},
+	{LCD_STEP_CMD_DATA, 0x0045, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0046, 0x013F},
+	{LCD_STEP_CMD_DATA, 0x004A, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x004B, 0x0000},
+	{LCD_STEP_SLEEP, 0, 20},
+	{LCD_STEP_CMD_DATA, 0x0030, 0x0707},
+	{LCD_STEP_CMD_DATA, 0x0031, 0x0704},
+	{LCD_STEP_CMD_DATA, 0x0032, 0x0204},
+	{LCD_STEP_CMD_DATA, 0x0033, 0x0201},
+	{LCD_STEP_CMD_DATA, 0x0034, 0x0203},
+	{LCD_STEP_CMD_DATA, 0x0035, 0x0204},
+	{LCD_STEP_CMD_DATA, 0x0036, 0x0204},
+	{LCD_STEP_CMD_DATA, 0x0037, 0x0502},
+	{LCD_STEP_CMD_DATA, 0x003A, 0x0302},
+	{LCD_STEP_CMD_DATA, 0x003B, 0x0500},
+	{LCD_STEP_SLEEP, 0, 20},
+	{LCD_STEP_CMD_DATA, 0x0044, 239 << 8 | 0},
+	{LCD_STEP_CMD_DATA, 0x0045, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0046, 319},
+	{LCD_STEP_DONE, 0, 0},
+};
+
+const struct ubicom32lcd_panel tft2n0369ep = {
+	.desc		= "TFT2N0369E-Portrait",
+	.init_seq	= tft2n0369ep_init,
+	.horz_reg	= 0x4e,
+	.vert_reg	= 0x4f,
+	.gram_reg	= 0x22,
+	.xres		= 240,
+	.yres		= 320,
+	.stride		= 240,
+	.id		= 0x8989,
+};
+#endif
+
+#ifdef CONFIG_LCD_UBICOM32_TFT2N0369E_L
+static const struct ubicom32lcd_step tft2n0369e_init[] = {
+	{LCD_STEP_CMD_DATA, 0x0028, 0x0006},
+	{LCD_STEP_CMD_DATA, 0x0000, 0x0001},
+	{LCD_STEP_SLEEP, 0, 15},
+	{LCD_STEP_CMD_DATA, 0x002B, 0x9532},
+	{LCD_STEP_CMD_DATA, 0x0003, 0xAAAC},
+	{LCD_STEP_CMD_DATA, 0x000C, 0x0002},
+	{LCD_STEP_CMD_DATA, 0x000D, 0x000A},
+	{LCD_STEP_CMD_DATA, 0x000E, 0x2C00},
+	{LCD_STEP_CMD_DATA, 0x001E, 0x00AA},
+	{LCD_STEP_CMD_DATA, 0x0025, 0x8000},
+	{LCD_STEP_SLEEP, 0, 15},
+	{LCD_STEP_CMD_DATA, 0x0001, 0x2B3F},
+	{LCD_STEP_CMD_DATA, 0x0002, 0x0600},
+	{LCD_STEP_CMD_DATA, 0x0010, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0011, 0x60A8},
+	{LCD_STEP_SLEEP, 0, 20},
+	{LCD_STEP_CMD_DATA, 0x0005, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0006, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0016, 0xEF1C},
+	{LCD_STEP_CMD_DATA, 0x0017, 0x0003},
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0233},
+	{LCD_STEP_CMD_DATA, 0x000B, 0x5312},
+	{LCD_STEP_CMD_DATA, 0x000F, 0x0000},
+	{LCD_STEP_SLEEP, 0, 20},
+	{LCD_STEP_CMD_DATA, 0x0041, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0042, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0048, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0049, 0x013F},
+	{LCD_STEP_CMD_DATA, 0x0044, 0xEF00},
+	{LCD_STEP_CMD_DATA, 0x0045, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0046, 0x013F},
+	{LCD_STEP_CMD_DATA, 0x004A, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x004B, 0x0000},
+	{LCD_STEP_SLEEP, 0, 20},
+	{LCD_STEP_CMD_DATA, 0x0030, 0x0707},
+	{LCD_STEP_CMD_DATA, 0x0031, 0x0704},
+	{LCD_STEP_CMD_DATA, 0x0032, 0x0204},
+	{LCD_STEP_CMD_DATA, 0x0033, 0x0201},
+	{LCD_STEP_CMD_DATA, 0x0034, 0x0203},
+	{LCD_STEP_CMD_DATA, 0x0035, 0x0204},
+	{LCD_STEP_CMD_DATA, 0x0036, 0x0204},
+	{LCD_STEP_CMD_DATA, 0x0037, 0x0502},
+	{LCD_STEP_CMD_DATA, 0x003A, 0x0302},
+	{LCD_STEP_CMD_DATA, 0x003B, 0x0500},
+	{LCD_STEP_SLEEP, 0, 20},
+	{LCD_STEP_CMD_DATA, 0x0044, 239 << 8 | 0},
+	{LCD_STEP_CMD_DATA, 0x0045, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0046, 319},
+	{LCD_STEP_DONE, 0, 0},
+};
+
+const struct ubicom32lcd_panel tft2n0369e = {
+	.desc		= "TFT2N0369E-Landscape",
+	.init_seq	= tft2n0369e_init,
+	.horz_reg	= 0x4e,
+	.vert_reg	= 0x4f,
+	.gram_reg	= 0x22,
+	.xres		= 320,
+	.yres		= 240,
+	.stride		= 320,
+	.id		= 0x8989,
+};
+#endif
+
+#ifdef CONFIG_LCD_UBICOM32_CFAF240400D
+static const struct ubicom32lcd_step cfaf240400d_init[] = {
+	{LCD_STEP_CMD_DATA, 0x0606, 0x0000},	// Pin Control (R606h)		// Page 41 of SPFD5420A Datasheet
+	{LCD_STEP_SLEEP, 0, 50},
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0001},	// Display Control 1 (R007h)	// Page 16 of SPFD5420A Datasheet
+	{LCD_STEP_SLEEP, 0, 50},
+	{LCD_STEP_CMD_DATA, 0x0110, 0x0001},	// Power Control 6(R110h)	// Page 30 of SPFD5420A Datasheet
+	{LCD_STEP_SLEEP, 0, 50},
+	{LCD_STEP_CMD_DATA, 0x0100, 0x17B0},	// Power Control 1 (R100h)	// Page 26 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0101, 0x0147},	// Power Control 2 (R101h)	// Page 27 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0102, 0x019D},	// Power Control 3 (R102h)	// Page 28 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0103, 0x3600},	// Power Control 4 (R103h)	// Page 29 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0281, 0x0010},	// NVM read data 2 (R281h)  	// Page 34 of SPFD5420A Datasheet
+	{LCD_STEP_SLEEP, 0, 50},
+	{LCD_STEP_CMD_DATA, 0x0102, 0x01BD},	// Power Control 3 (R102h)	// Page 28 of SPFD5420A Datasheet
+	{LCD_STEP_SLEEP, 0, 50},
+
+	//--------------- Power control 1~6 ---------------//
+	{LCD_STEP_CMD_DATA, 0x0100, 0x16B0},	// Power Control 1 (R100h)	// Page 26 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0101, 0x0147},	// Power Control 2 (R101h)	// Page 27 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0102, 0x01BD},	// Power Control 3 (R102h)	// Page 28 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0103, 0x2d00},	// Power Control 4 (R103h)	// Page 29 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0107, 0x0000},	// Power Control 5 (R107h)	// Page 30 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0110, 0x0001},	// Power Control 6(R110h)	// Page 30 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0280, 0x0000},	// NVM read data 1 (R280h)	// Page 33 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0281, 0x0006},	// NVM read data 2 (R281h)	// Page 34 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0282, 0x0000},	// NVM read data 3 (R282h)	// Page 34 of SPFD5420A Datasheet
+
+	//------- Gamma 2.2 control (R300h to R30Fh) ------//
+	{LCD_STEP_CMD_DATA, 0x0300, 0x0101},
+	{LCD_STEP_CMD_DATA, 0x0301, 0x0b27},
+	{LCD_STEP_CMD_DATA, 0x0302, 0x132a},
+	{LCD_STEP_CMD_DATA, 0x0303, 0x2a13},
+	{LCD_STEP_CMD_DATA, 0x0304, 0x270b},
+	{LCD_STEP_CMD_DATA, 0x0305, 0x0101},
+	{LCD_STEP_CMD_DATA, 0x0306, 0x1205},
+	{LCD_STEP_CMD_DATA, 0x0307, 0x0512},
+	{LCD_STEP_CMD_DATA, 0x0308, 0x0005},
+	{LCD_STEP_CMD_DATA, 0x0309, 0x0003},
+	{LCD_STEP_CMD_DATA, 0x030A, 0x0f04},
+	{LCD_STEP_CMD_DATA, 0x030B, 0x0f00},
+	{LCD_STEP_CMD_DATA, 0x030C, 0x000f},
+	{LCD_STEP_CMD_DATA, 0x030D, 0x040f},
+	{LCD_STEP_CMD_DATA, 0x030E, 0x0300},
+	{LCD_STEP_CMD_DATA, 0x030F, 0x0500},
+
+	{LCD_STEP_CMD_DATA, 0x0400, 0x3500},	// Base Image Number of Line (R400h)		// Page 36 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0401, 0x0001},	// Base Image Display Control (R401h)		// Page 39 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0404, 0x0000},	// Based Image Vertical Scroll Control (R404h)	// Page 40 of SPFD5420A Datasheet
+
+	//--------------- Normal set ---------------//
+	{LCD_STEP_CMD_DATA, 0x0000, 0x0000},	// ID Read Register (R000h)			// Page 13 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0001, 0x0100},	// Driver Output Control Register (R001h)	// Page 14 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0002, 0x0100},	// LCD Driving Waveform Control (R002h)		// Page 14 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0003, 0x1030},	// Entry Mode (R003h)				// Page 15 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0006, 0x0000},	// Display Control 1 (R007h)			// Page 16 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0008, 0x0808},	// Display Control 2 (R008h)			// Page 17 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0009, 0x0001},	// Display Control 3 (R009h)			// Page 18 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x000B, 0x0010},	// Low Power Control (R00Bh)			// Page 19 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x000C, 0x0000},	// External Display Interface Control 1 (R00Ch)	// Page 19 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x000F, 0x0000},	// External Display Interface Control 2 (R00Fh)	// Page 20 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0001},	// Display Control 1 (R007h)			// Page 16 of SPFD5420A Datasheet
+
+	//--------------- Panel interface control 1~6 ---------------//
+	{LCD_STEP_CMD_DATA, 0x0010, 0x0012},	// Panel Interface Control 1 (R010h)		// Page 20 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0011, 0x0202},	// Panel Interface Control 2 (R011h)		// Page 21 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0012, 0x0300},	// Panel Interface control 3 (R012h)		// Page 22 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0020, 0x021E},	// Panel Interface control 4 (R020h)		// Page 22 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0021, 0x0202},	// Panel Interface Control 5 (021Rh)		// Page 24 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0022, 0x0100},	// Panel Interface Control 6 (R022h)		// Page 25 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0090, 0x8000},	// Frame Marker Control (R090h)			// Page 25 of SPFD5420A Datasheet
+
+	//--------------- Partial display ---------------//
+	{LCD_STEP_CMD_DATA, 0x0210, 0x0000},	// Window Horizontal RAM Address Start (R210h)	// Page 35 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0211, 0x00EF},	// Window Horziontal RAM Address End (R211h)	// Page 35 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0212, 0x0000},	// Window Vertical RAM Address Start (R212h)	// Page 35 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0213, 0x018F},	// Window Vertical RAM Address End (R213h)	// Page 35 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0500, 0x0000},	// Display Position - Partial Display 1 (R500h)	// Page 40 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0501, 0x0000},	// RAM Address Start - Partial Display 1 (R501h)// Page 40 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0502, 0x0000},	// RAM Address End - Partail Display 1 (R502h)	// Page 40 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0503, 0x0000},	// Display Position - Partial Display 2 (R503h)	// Page 40 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0504, 0x0000},	// RAM Address Start . Partial Display 2 (R504h)// Page 41 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0505, 0x0000},	// RAM Address End . Partial Display 2 (R505h)	// Page 41 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0606, 0x0000},	// Pin Control (R606h)				// Page 41 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x06F0, 0x0000},	// NVM Access Control (R6F0h)			// Page 41 of SPFD5420A Datasheet
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0173},	// Display Control 1 (R007h)			// Page 16 of SPFD5420A Datasheet
+	{LCD_STEP_SLEEP, 0, 50},
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0171},	// Display Control 1 (R007h)			// Page 16 of SPFD5420A Datasheet
+	{LCD_STEP_SLEEP, 0, 10},
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0173},	// Display Control 1 (R007h)			// Page 16 of SPFD5420A Datasheet
+	{LCD_STEP_DONE, 0, 0},
+};
+
+const struct ubicom32lcd_panel cfaf240400d = {
+	.desc		= "CFAF240400D",
+	.init_seq	= cfaf240400d_init,
+	.horz_reg	= 0x0200,
+	.vert_reg	= 0x0201,
+	.gram_reg	= 0x0202,
+	.xres		= 240,
+	.yres		= 400,
+	.stride		= 240,
+	.id		= 0x5420,
+};
+#endif
+
+#ifdef CONFIG_LCD_UBICOM32_CFAF240400F
+static const struct ubicom32lcd_step cfaf320240f_init[] = {
+	{LCD_STEP_CMD_DATA, 0x0028, 0x0006},	// VCOM OTP			 	Page 55-56 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0000, 0x0001},	// start Oscillator		 	Page 36 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0010, 0x0000},	// Sleep mode			 	Page 49 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0001, 0x32EF},	// Driver Output Control	 	Page 36-39 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0002, 0x0600},	// LCD Driving Waveform Control	 	Page 40-42 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0003, 0x6A38},	// Power Control 1		 	Page 43-44 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0011, 0x6870},	// Entry Mode			 	Page 50-52 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0X000F, 0x0000},	// Gate Scan Position		 	Page 49 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0X000B, 0x5308},	// Frame Cycle Control		 	Page 45 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x000C, 0x0003},	// Power Control 2		 	Page 47 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x000D, 0x000A},	// Power Control 3		 	Page 48 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x000E, 0x2E00},	// Power Control 4		 	Page 48 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x001E, 0x00BE},	// Power Control 5		 	Page 53 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0025, 0x8000},	// Frame Frequency Control	 	Page 53 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0026, 0x7800},	// Analog setting		 	Page 54 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x004E, 0x0000},	// Ram Address Set		 	Page 58 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x004F, 0x0000},	// Ram Address Set		 	Page 58 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0012, 0x08D9},	// Sleep mode			 	Page 49 of SSD2119 datasheet
+
+	// Gamma Control (R30h to R3Bh) -- Page 56 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0030, 0x0000},
+	{LCD_STEP_CMD_DATA, 0x0031, 0x0104},
+	{LCD_STEP_CMD_DATA, 0x0032, 0x0100},
+	{LCD_STEP_CMD_DATA, 0x0033, 0x0305},
+	{LCD_STEP_CMD_DATA, 0x0034, 0x0505},
+	{LCD_STEP_CMD_DATA, 0x0035, 0x0305},
+	{LCD_STEP_CMD_DATA, 0x0036, 0x0707},
+	{LCD_STEP_CMD_DATA, 0x0037, 0x0300},
+	{LCD_STEP_CMD_DATA, 0x003A, 0x1200},
+	{LCD_STEP_CMD_DATA, 0x003B, 0x0800},
+
+	{LCD_STEP_CMD_DATA, 0x0007, 0x0033},	// Display Control 			 Page 45 of SSD2119 datasheet
+
+	{LCD_STEP_CMD_DATA, 0x0044, 0xEF00},	// Vertical RAM address position	 Page 57 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0045, 0x0000},	// Horizontal RAM address position 	 Page 57 of SSD2119 datasheet
+	{LCD_STEP_CMD_DATA, 0x0046, 0x013F},	// Horizontal RAM address position	 Page 57 of SSD2119 datasheet
+
+	{LCD_STEP_SLEEP, 0, 150},
+
+	{LCD_STEP_DONE, 0, 0},
+};
+
+const struct ubicom32lcd_panel cfaf320240f = {
+	.desc		= "CFAF320240F",
+	.init_seq	= cfaf320240f_init,
+	.horz_reg	= 0x4e,
+	.vert_reg	= 0x4f,
+	.gram_reg	= 0x22,
+	.xres		= 320,
+	.yres		= 240,
+	.stride		= 320,
+	.id		= 0x9919,
+};
+#endif
+
+const struct ubicom32lcd_panel *ubicom32lcd_panels[] = {
+#ifdef CONFIG_LCD_UBICOM32_CFAF240400KTTS_180
+	&cfaf240320ktts_180,
+#endif
+#ifdef CONFIG_LCD_UBICOM32_CFAF240400KTTS
+	&cfaf240320ktts_0,
+#endif
+#ifdef CONFIG_LCD_UBICOM32_CFAF240400D
+	&cfaf240400d,
+#endif
+#ifdef CONFIG_LCD_UBICOM32_TFT2N0369E_P
+	&tft2n0369ep,
+#endif
+#ifdef CONFIG_LCD_UBICOM32_TFT2N0369E_L
+	&tft2n0369e,
+#endif
+#ifdef CONFIG_LCD_UBICOM32_CFAF240400F
+	&cfaf320240f,
+#endif
+	NULL,
+};
+
+#endif

target/linux/ubicom32/files/drivers/video/backlight/ubicom32lcdpower.c

@@ -0,0 +1,194 @@
+/*
+ * drivers/video/backlight/ubicom32lcdpowerpower.c
+ *	LCD power driver for the Ubicom32 platform
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/lcd.h>
+#include <linux/fb.h>
+#include <linux/gpio.h>
+
+#include <asm/ubicom32lcdpower.h>
+#include <asm/ip5000.h>
+
+#define DRIVER_NAME			"ubicom32lcdpower"
+
+struct ubicom32lcdpower_data {
+	/*
+	 * Pointer to the platform data structure.  Keep this around since we need values
+	 * from it to set the backlight intensity.
+	 */
+	const struct ubicom32lcdpower_platform_data	*pdata;
+
+	/*
+	 * LCD device, we have to save this for use when we remove ourselves.
+	 */
+	struct lcd_device			*lcddev;
+};
+
+/*
+ * ubicom32lcdpower_set_power
+ */
+static int ubicom32lcdpower_set_power(struct lcd_device *ld, int power)
+{
+	struct ubicom32lcdpower_data *ud = (struct ubicom32lcdpower_data *)lcd_get_data(ld);
+	if (power == FB_BLANK_UNBLANK) {
+		gpio_direction_output(ud->pdata->vgh_gpio, ud->pdata->vgh_polarity);
+		return 0;
+	}
+
+	gpio_direction_output(ud->pdata->vgh_gpio, !ud->pdata->vgh_polarity);
+	return 0;
+}
+
+/*
+ * ubicom32lcdpower_get_power
+ */
+static int ubicom32lcdpower_get_power(struct lcd_device *ld)
+{
+	struct ubicom32lcdpower_data *ud = (struct ubicom32lcdpower_data *)lcd_get_data(ld);
+	int vgh = gpio_get_value(ud->pdata->vgh_gpio);
+	if ((vgh && ud->pdata->vgh_polarity) || (!vgh && !ud->pdata->vgh_polarity)) {
+		return 1;
+	}
+
+	return 0;
+}
+
+static struct lcd_ops ubicom32lcdpower_ops = {
+	.get_power = ubicom32lcdpower_get_power,
+	.set_power = ubicom32lcdpower_set_power,
+};
+
+/*
+ * ubicom32lcdpower_probe
+ */
+static int ubicom32lcdpower_probe(struct platform_device *pdev)
+{
+	const struct ubicom32lcdpower_platform_data *pdata = pdev->dev.platform_data;
+	struct ubicom32lcdpower_data *ud;
+	struct lcd_device *lcddev;
+	int retval;
+
+	/*
+	 * Check to see if we have any platform data, if we don't have a LCD to control
+	 */
+	if (!pdata) {
+		return -ENODEV;
+	}
+
+	/*
+	 * Allocate our private data
+	 */
+	ud = kzalloc(sizeof(struct ubicom32lcdpower_data), GFP_KERNEL);
+	if (!ud) {
+		return -ENOMEM;
+	}
+
+	ud->pdata = pdata;
+
+	/*
+	 * Request our GPIOs
+	 */
+	retval = gpio_request(pdata->vgh_gpio, "vgh");
+	if (retval) {
+		dev_err(&pdev->dev, "Failed to allocate vgh GPIO\n");
+		goto fail_gpio;
+	}
+
+	/*
+	 * Register our lcd device
+	 */
+	lcddev = lcd_device_register(DRIVER_NAME, &pdev->dev, ud, &ubicom32lcdpower_ops);
+	if (IS_ERR(lcddev)) {
+		retval = PTR_ERR(lcddev);
+		goto fail;
+	}
+
+	ud->lcddev = lcddev;
+	platform_set_drvdata(pdev, ud);
+
+	ubicom32lcdpower_set_power(lcddev, FB_BLANK_UNBLANK);
+
+	printk(KERN_INFO DRIVER_NAME ": LCD driver started\n");
+
+	return 0;
+
+fail:
+	gpio_free(pdata->vgh_gpio);
+
+fail_gpio:
+	platform_set_drvdata(pdev, NULL);
+	kfree(ud);
+	return retval;
+}
+
+/*
+ * ubicom32lcdpower_remove
+ */
+static int __exit ubicom32lcdpower_remove(struct platform_device *pdev)
+{
+	struct ubicom32lcdpower_data *ud = platform_get_drvdata(pdev);
+
+	lcd_device_unregister(ud->lcddev);
+	platform_set_drvdata(pdev, NULL);
+	kfree(ud);
+
+	return 0;
+}
+
+static struct platform_driver ubicom32lcdpower_driver = {
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner = THIS_MODULE,
+	},
+
+	.remove = __exit_p(ubicom32lcdpower_remove),
+};
+
+/*
+ * ubicom32lcdpower_init
+ */
+static int __init ubicom32lcdpower_init(void)
+{
+	return platform_driver_probe(&ubicom32lcdpower_driver, ubicom32lcdpower_probe);
+}
+module_init(ubicom32lcdpower_init);
+
+/*
+ * ubicom32lcdpower_exit
+ */
+static void __exit ubicom32lcdpower_exit(void)
+{
+	platform_driver_unregister(&ubicom32lcdpower_driver);
+}
+module_exit(ubicom32lcdpower_exit);
+
+MODULE_AUTHOR("Patrick Tjin <@ubicom.com>");
+MODULE_DESCRIPTION("Ubicom32 lcd power driver");
+MODULE_LICENSE("GPL");

target/linux/ubicom32/files/drivers/video/ubicom32fb.c

@@ -0,0 +1,779 @@
+/*
+ * drivers/video/ubicom32fb.c
+ *	Ubicom32 frame buffer driver
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+
+/*
+ * This driver was based on skeletonfb.c, Skeleton for a frame buffer device by
+ * Geert Uytterhoeven.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/device.h>
+#include <linux/uaccess.h>
+#include <linux/interrupt.h>
+
+#include <asm/io.h>
+#include <asm/ip5000.h>
+#include <asm/vdc_tio.h>
+#include <asm/ubicom32fb.h>
+
+#define DRIVER_NAME		"ubicom32fb"
+#define DRIVER_DESCRIPTION	"Ubicom32 frame buffer driver"
+
+#define PALETTE_ENTRIES_NO	16
+
+/*
+ * Option variables
+ *
+ * vram_size:	VRAM size in kilobytes, subject to alignment
+ */
+static int vram_size = 0;
+module_param(vram_size, int, 0);
+MODULE_PARM_DESC(vram, "VRAM size, in kilobytes to allocate, should be at least the size of one screen, subject to alignment");
+static int init_value = 0;
+module_param(init_value, int, 0);
+MODULE_PARM_DESC(init, "Initial value of the framebuffer (16-bit number).");
+
+/*
+ * fb_fix_screeninfo defines the non-changeable properties of the VDC, depending on what mode it is in.
+ */
+static struct fb_fix_screeninfo ubicom32fb_fix = {
+	.id =		"Ubicom32",
+	.type =		FB_TYPE_PACKED_PIXELS,
+	.visual =	FB_VISUAL_TRUECOLOR,
+	.accel =	FB_ACCEL_UBICOM32,
+};
+
+/*
+ * Filled in at probe time when we find out what the hardware supports
+ */
+static struct fb_var_screeninfo ubicom32fb_var;
+
+/*
+ * Private data structure
+ */
+struct ubicom32fb_drvdata {
+	struct fb_info			*fbinfo;
+	bool				cmap_alloc;
+
+	/*
+	 * The address of the framebuffer in memory
+	 */
+	void				*fb;
+	void				*fb_aligned;
+
+	/*
+	 * Total size of vram including alignment allowance
+	 */
+	u32				total_vram_size;
+
+	/*
+	 * Interrupt to set when changing registers
+	 */
+	u32				vp_int;
+
+	/*
+	 * Optional: Interrupt used by TIO to signal us
+	 */
+	u32				rx_int;
+
+	/*
+	 * Base address of the regs for VDC_TIO
+	 */
+	volatile struct vdc_tio_vp_regs	*regs;
+
+	/*
+	 * non-zero if we are in yuv mode
+	 */
+	u8_t				is_yuv;
+
+	/*
+	 * Fake palette of 16 colors
+	 */
+	u32				pseudo_palette[PALETTE_ENTRIES_NO];
+
+	/*
+	 * Wait queue and lock used to block when we need to wait
+	 * for something to happen.
+	 */
+	wait_queue_head_t		waitq;
+	struct mutex			lock;
+
+};
+
+/*
+ * ubicom32fb_set_next_frame
+ *	Sets the next frame buffer to display
+ *
+ * if sync is TRUE then this function will block until the hardware
+ * acknowledges the change
+ */
+static inline void ubicom32fb_set_next_frame(struct ubicom32fb_drvdata *ud, void *fb, u8_t sync)
+{
+	ud->regs->next_frame_flags = ud->is_yuv ? VDCTIO_NEXT_FRAME_FLAG_YUV : 0;
+	ud->regs->next_frame = (void *)((u32_t)fb | 1);
+
+	/*
+	 * If we have interrupts, then we can wait on it
+	 */
+	if (ud->rx_int != -1) {
+		DEFINE_WAIT(wait);
+		unsigned long flags;
+
+		spin_lock_irqsave(&ud->lock, flags);
+		prepare_to_wait(&ud->waitq, &wait, TASK_INTERRUPTIBLE);
+		spin_unlock_irqrestore(&ud->lock, flags);
+		schedule();
+		finish_wait(&ud->waitq, &wait);
+		return;
+	}
+
+	/*
+	 * No interrupt, we will just spin here
+	 */
+	while (sync && ((u32_t)ud->regs->next_frame & 1));
+}
+
+/*
+ * ubicom32fb_send_command
+ *	Sends a command/data pair to the VDC
+ */
+static inline void ubicom32fb_send_command(struct ubicom32fb_drvdata *ud, u16 command, u8_t block)
+{
+	ud->regs->command = command;
+	ubicom32_set_interrupt(ud->vp_int);
+	while (block && ud->regs->command);
+}
+
+/*
+ * ubicom32fb_ioctl
+ *	Handles any ioctls sent to us
+ */
+static int ubicom32fb_ioctl(struct fb_info *fbi, unsigned int cmd,
+		       unsigned long arg)
+{
+	struct ubicom32fb_drvdata *ud = (struct ubicom32fb_drvdata *)fbi->par;
+	void __user *argp = (void __user *)arg;
+	int retval = -EFAULT;
+
+	switch (cmd) {
+	case UBICOM32FB_IOCTL_SET_NEXT_FRAME_SYNC:
+		// check alignment, return -EINVAL if necessary
+		ubicom32fb_set_next_frame(ud, argp, 1);
+		retval = 0;
+		break;
+
+	case UBICOM32FB_IOCTL_SET_NEXT_FRAME:
+		// check alignment, return -EINVAL if necessary
+		ubicom32fb_set_next_frame(ud, argp, 0);
+		retval = 0;
+		break;
+
+	case UBICOM32FB_IOCTL_SET_MODE:
+		if (!(ud->regs->caps & VDCTIO_CAPS_SUPPORTS_SCALING)) {
+			break;
+		} else {
+			struct ubicom32fb_mode mode;
+			volatile struct vdc_tio_vp_regs *regs = ud->regs;
+			u32_t flags = 0;
+
+			if (copy_from_user(&mode, argp, sizeof(mode))) {
+				break;
+			}
+
+			regs->x_in = mode.width;
+			regs->y_in = mode.height;
+			regs->x_out = regs->xres;
+			regs->y_out = regs->yres;
+			if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_YUV_SCAN_ORDER) {
+				flags |= VDCTIO_SCALE_FLAG_YUV_SCAN_ORDER;
+			}
+			if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_YUV_BLOCK_ORDER) {
+				flags |= VDCTIO_SCALE_FLAG_YUV_BLOCK_ORDER;
+			}
+			ud->is_yuv = mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_YUV;
+			if (ud->is_yuv) {
+				flags |= VDCTIO_SCALE_FLAG_YUV;
+			}
+			if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_VRANGE_16_255) {
+				flags |= VDCTIO_SCALE_FLAG_VRANGE_16_255;
+			}
+			if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_VRANGE_0_255) {
+				flags |= VDCTIO_SCALE_FLAG_VRANGE_0_255;
+			}
+			if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_VSUB) {
+				flags |= VDCTIO_SCALE_FLAG_VSUB;
+			}
+			if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_HSUB_2_1) {
+				flags |= VDCTIO_SCALE_FLAG_HSUB_2_1;
+			}
+			if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_HSUB_1_1) {
+				flags |= VDCTIO_SCALE_FLAG_HSUB_1_1;
+			}
+			if (mode.flags & UBICOM32FB_IOCTL_SET_MODE_FLAG_SCALE_ENABLE) {
+				flags |= VDCTIO_SCALE_FLAG_ENABLE;
+			}
+			if (mode.next_frame) {
+				flags |= VDCTIO_SCALE_FLAG_SET_FRAME_BUFFER;
+				regs->next_frame = mode.next_frame;
+			}
+
+			regs->scale_flags = flags;
+			ubicom32fb_send_command(ud, VDCTIO_COMMAND_SET_SCALE_MODE, 1);
+			retval = 0;
+			break;
+		}
+
+	default:
+		retval = -ENOIOCTLCMD;
+		break;
+	}
+
+	return retval;
+}
+
+/*
+ * ubicom32fb_interrupt
+ *	Called by the OS when the TIO has set the rx_int
+ */
+static irqreturn_t ubicom32fb_interrupt(int vec, void *appdata)
+{
+	struct ubicom32fb_drvdata *ud = (struct ubicom32fb_drvdata *)appdata;
+
+	spin_lock(&ud->lock);
+	if (waitqueue_active(&ud->waitq)) {
+		wake_up(&ud->waitq);
+	}
+	spin_unlock(&ud->lock);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * ubicom32fb_pan_display
+ *	Pans the display to a given location.  Supports only y direction panning.
+ */
+static int ubicom32fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
+{
+	struct ubicom32fb_drvdata *ud = (struct ubicom32fb_drvdata *)fbi->par;
+	void *new_addr;
+
+	/*
+	 * Get the last y line that would be displayed.  Since we don't support YWRAP,
+	 * it must be less than our virtual y size.
+	 */
+	u32 lasty = var->yoffset + var->yres;
+	if (lasty > fbi->var.yres_virtual) {
+		/*
+		 * We would fall off the end of our frame buffer if we panned here.
+		 */
+		return -EINVAL;
+	}
+
+	if (var->xoffset) {
+		/*
+		 * We don't support panning in the x direction
+		 */
+		return -EINVAL;
+	}
+
+	/*
+	 * Everything looks sane, go ahead and pan
+	 *
+	 * We have to calculate a new address for the VDC to look at
+	 */
+	new_addr = ud->fb_aligned + (var->yoffset * fbi->fix.line_length);
+
+	/*
+	 * Send down the command.  The buffer will switch at the next vertical blank
+	 */
+	ubicom32fb_set_next_frame(ud, (void *)new_addr, 0);
+
+	return 0;
+}
+
+/*
+ * ubicom32fb_setcolreg
+ *	Sets a color in our virtual palette
+ */
+static int ubicom32fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
+{
+	u32 *palette = fbi->pseudo_palette;
+
+	if (regno >= PALETTE_ENTRIES_NO) {
+		return -EINVAL;
+	}
+
+	/*
+	 * We only use 8 bits from each color
+	 */
+	red >>= 8;
+	green >>= 8;
+	blue >>= 8;
+
+	/*
+	 * Convert any grayscale values
+	 */
+	if (fbi->var.grayscale) {
+		u16 gray = red + green + blue;
+		gray += (gray >> 2) + (gray >> 3) - (gray >> 7);
+		gray >>= 2;
+		if (gray > 255) {
+			gray = 255;
+		}
+		red = gray;
+		blue = gray;
+		green = gray;
+	}
+
+	palette[regno] = (red << fbi->var.red.offset) | (green << fbi->var.green.offset) |
+			 (blue << fbi->var.blue.offset);
+
+	return 0;
+}
+
+/*
+ * ubicom32fb_mmap
+ */
+static int ubicom32fb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+	struct ubicom32fb_drvdata *drvdata = (struct ubicom32fb_drvdata *)info->par;
+
+	vma->vm_start = (unsigned long)(drvdata->fb_aligned);
+
+	vma->vm_end = vma->vm_start + info->fix.smem_len;
+
+	/* For those who don't understand how mmap works, go read
+	 *   Documentation/nommu-mmap.txt.
+	 * For those that do, you will know that the VM_MAYSHARE flag
+	 * must be set in the vma->vm_flags structure on noMMU
+	 *   Other flags can be set, and are documented in
+	 *   include/linux/mm.h
+	 */
+
+	vma->vm_flags |=  VM_MAYSHARE | VM_SHARED;
+
+	return 0;
+}
+
+/*
+ * ubicom32fb_blank
+ */
+static int ubicom32fb_blank(int blank_mode, struct fb_info *fbi)
+{
+	return 0;
+#if 0
+	struct ubicom32fb_drvdata *drvdata = to_ubicom32fb_drvdata(fbi);
+
+	switch (blank_mode) {
+	case FB_BLANK_UNBLANK:
+		/* turn on panel */
+		ubicom32fb_out_be32(drvdata, REG_CTRL, drvdata->reg_ctrl_default);
+		break;
+
+	case FB_BLANK_NORMAL:
+	case FB_BLANK_VSYNC_SUSPEND:
+	case FB_BLANK_HSYNC_SUSPEND:
+	case FB_BLANK_POWERDOWN:
+		/* turn off panel */
+		ubicom32fb_out_be32(drvdata, REG_CTRL, 0);
+	default:
+		break;
+
+	}
+	return 0; /* success */
+#endif
+}
+
+static struct fb_ops ubicom32fb_ops =
+{
+	.owner			= THIS_MODULE,
+	.fb_pan_display		= ubicom32fb_pan_display,
+	.fb_setcolreg		= ubicom32fb_setcolreg,
+	.fb_blank		= ubicom32fb_blank,
+	.fb_mmap		= ubicom32fb_mmap,
+	.fb_ioctl		= ubicom32fb_ioctl,
+	.fb_fillrect		= cfb_fillrect,
+	.fb_copyarea		= cfb_copyarea,
+	.fb_imageblit		= cfb_imageblit,
+};
+
+/*
+ * ubicom32fb_release
+ */
+static int ubicom32fb_release(struct device *dev)
+{
+	struct ubicom32fb_drvdata *ud = dev_get_drvdata(dev);
+
+#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
+	//ubicom32fb_blank(VESA_POWERDOWN, &drvdata->info);
+#endif
+
+	unregister_framebuffer(ud->fbinfo);
+
+	if (ud->cmap_alloc) {
+		fb_dealloc_cmap(&ud->fbinfo->cmap);
+	}
+
+	if (ud->fb) {
+		kfree(ud->fb);
+	}
+
+	if (ud->rx_int != -1) {
+		free_irq(ud->rx_int, ud);
+	}
+
+	/*
+	 * Turn off the display
+	 */
+	//ubicom32fb_out_be32(drvdata, REG_CTRL, 0);
+	//iounmap(drvdata->regs);
+
+	framebuffer_release(ud->fbinfo);
+	dev_set_drvdata(dev, NULL);
+
+	return 0;
+}
+
+/*
+ * ubicom32fb_platform_probe
+ */
+static int __init ubicom32fb_platform_probe(struct platform_device *pdev)
+{
+	struct ubicom32fb_drvdata *ud;
+	struct resource *irq_resource_rx;
+	struct resource *irq_resource_tx;
+	struct resource *mem_resource;
+	struct fb_info *fbinfo;
+	int rc;
+	size_t fbsize;
+	struct device *dev = &pdev->dev;
+	int offset;
+	struct vdc_tio_vp_regs *regs;
+
+	/*
+	 * Get our resources
+	 */
+	irq_resource_tx = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!irq_resource_tx) {
+		dev_err(dev, "No tx IRQ resource assigned\n");
+		return -ENODEV;
+	}
+
+	irq_resource_rx = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
+	if (!irq_resource_rx) {
+		dev_err(dev, "No rx IRQ resource assigned\n");
+		return -ENODEV;
+	}
+
+	mem_resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!mem_resource || !mem_resource->start) {
+		dev_err(dev, "No mem resource assigned\n");
+		return -ENODEV;
+	}
+	regs = (struct vdc_tio_vp_regs *)mem_resource->start;
+	if (regs->version != VDCTIO_VP_VERSION) {
+		dev_err(dev, "VDCTIO is not compatible with this driver tio:%x drv:%x\n",
+			regs->version, VDCTIO_VP_VERSION);
+		return -ENODEV;
+	}
+
+	/*
+	 * This is the minimum VRAM size
+	 */
+	fbsize = regs->xres * regs->yres * (regs->bpp / 8);
+	if (!vram_size) {
+		vram_size = (fbsize + 1023) / 1024;
+	} else {
+		if (fbsize > (vram_size * 1024)) {
+			dev_err(dev, "Not enough VRAM for display, need >= %u bytes\n", fbsize);
+			return -ENOMEM; // should be ebadparam?
+		}
+	}
+
+	/*
+	 * Allocate the framebuffer instance + our private data
+	 */
+	fbinfo = framebuffer_alloc(sizeof(struct ubicom32fb_drvdata), &pdev->dev);
+	if (!fbinfo) {
+		dev_err(dev, "Not enough memory to allocate instance.\n");
+		return -ENOMEM;
+	}
+
+	/*
+	 * Fill in our private data.
+	 */
+	ud = (struct ubicom32fb_drvdata *)fbinfo->par;
+	ud->fbinfo = fbinfo;
+	ud->regs = (struct vdc_tio_vp_regs *)(mem_resource->start);
+	dev_set_drvdata(dev, ud);
+
+	ud->vp_int = irq_resource_tx->start;
+
+	/*
+	 * If we were provided an rx_irq then we need to init the appropriate
+	 * queues, locks, and functions.
+	 */
+	ud->rx_int = -1;
+	if (irq_resource_rx->start != DEVTREE_IRQ_NONE) {
+		init_waitqueue_head(&ud->waitq);
+		mutex_init(&ud->lock);
+		if (request_irq(ud->rx_int, ubicom32fb_interrupt, IRQF_SHARED, "ubicom32fb_rx", ud)) {
+			dev_err(dev, "Couldn't request rx IRQ\n");
+			rc = -ENOMEM;
+			goto fail;
+		}
+		ud->rx_int = irq_resource_rx->start;
+	}
+
+	/*
+	 * Allocate and align the requested amount of VRAM
+	 */
+	ud->total_vram_size = (vram_size * 1024) + regs->fb_align;
+	ud->fb = kmalloc(ud->total_vram_size, GFP_KERNEL);
+	if (ud->fb == NULL) {
+		dev_err(dev, "Couldn't allocate VRAM\n");
+		rc = -ENOMEM;
+		goto fail;
+	}
+
+	offset = (u32_t)ud->fb & (regs->fb_align - 1);
+	if (!offset) {
+		ud->fb_aligned = ud->fb;
+	} else {
+		offset = regs->fb_align - offset;
+		ud->fb_aligned = ud->fb + offset;
+	}
+
+	/*
+	 * Clear the entire frame buffer
+	 */
+	if (!init_value) {
+		memset(ud->fb_aligned, 0, vram_size * 1024);
+	} else {
+		unsigned short *p = ud->fb_aligned;
+		int i;
+		for (i = 0; i < ((vram_size * 1024) / sizeof(u16_t)); i++) {
+			*p++ = init_value;
+		}
+	}
+
+	/*
+	 * Fill in the fb_var_screeninfo structure
+	 */
+	memset(&ubicom32fb_var, 0, sizeof(ubicom32fb_var));
+	ubicom32fb_var.bits_per_pixel = regs->bpp;
+	ubicom32fb_var.red.offset = regs->rshift;
+	ubicom32fb_var.green.offset = regs->gshift;
+	ubicom32fb_var.blue.offset = regs->bshift;
+	ubicom32fb_var.red.length = regs->rbits;
+	ubicom32fb_var.green.length = regs->gbits;
+	ubicom32fb_var.blue.length = regs->bbits;
+	ubicom32fb_var.activate = FB_ACTIVATE_NOW;
+
+#if 0
+	/*
+	 * Turn on the display
+	 */
+	ud->reg_ctrl_default = REG_CTRL_ENABLE;
+	if (regs->rotate_screen)
+		ud->reg_ctrl_default |= REG_CTRL_ROTATE;
+	ubicom32fb_out_be32(ud, REG_CTRL, ud->reg_ctrl_default);
+#endif
+
+	/*
+	 * Fill in the fb_info structure
+	 */
+	ud->fbinfo->device = dev;
+	ud->fbinfo->screen_base = (void *)ud->fb_aligned;
+	ud->fbinfo->fbops = &ubicom32fb_ops;
+	ud->fbinfo->fix = ubicom32fb_fix;
+	ud->fbinfo->fix.smem_start = (u32)ud->fb_aligned;
+	ud->fbinfo->fix.smem_len = vram_size * 1024;
+	ud->fbinfo->fix.line_length = regs->xres * (regs->bpp / 8);
+	ud->fbinfo->fix.mmio_start = (u32)regs;
+	ud->fbinfo->fix.mmio_len = sizeof(struct vdc_tio_vp_regs);
+
+	/*
+	 * We support panning in the y direction only
+	 */
+	ud->fbinfo->fix.xpanstep = 0;
+	ud->fbinfo->fix.ypanstep = 1;
+
+	ud->fbinfo->pseudo_palette = ud->pseudo_palette;
+	ud->fbinfo->flags = FBINFO_DEFAULT;
+	ud->fbinfo->var = ubicom32fb_var;
+	ud->fbinfo->var.xres = regs->xres;
+	ud->fbinfo->var.yres = regs->yres;
+
+	/*
+	 * We cannot pan in the X direction, so xres_virtual is regs->xres
+	 * We can pan in the Y direction, so yres_virtual is vram_size / ud->fbinfo->fix.line_length
+	 */
+	ud->fbinfo->var.xres_virtual = regs->xres;
+	ud->fbinfo->var.yres_virtual = (vram_size * 1024) / ud->fbinfo->fix.line_length;
+
+	//ud->fbinfo->var.height = regs->height_mm;
+	//ud->fbinfo->var.width = regs->width_mm;
+
+	/*
+	 * Allocate a color map
+	 */
+	rc = fb_alloc_cmap(&ud->fbinfo->cmap, PALETTE_ENTRIES_NO, 0);
+	if (rc) {
+		dev_err(dev, "Fail to allocate colormap (%d entries)\n",
+			PALETTE_ENTRIES_NO);
+		goto fail;
+	}
+	ud->cmap_alloc = true;
+
+	/*
+	 * Register new frame buffer
+	 */
+	rc = register_framebuffer(ud->fbinfo);
+	if (rc) {
+		dev_err(dev, "Could not register frame buffer\n");
+		goto fail;
+	}
+
+	/*
+	 * Start up the VDC
+	 */
+	ud->regs->next_frame = ud->fb;
+	ubicom32fb_send_command(ud, VDCTIO_COMMAND_START, 0);
+
+	/*
+	 * Tell the log we are here
+	 */
+	dev_info(dev, "fbaddr=%p align=%p, size=%uKB screen(%ux%u) virt(%ux%u), regs=%p irqtx=%u irqrx=%u\n",
+		ud->fb, ud->fb_aligned, vram_size, ud->fbinfo->var.xres, ud->fbinfo->var.yres,
+		ud->fbinfo->var.xres_virtual, ud->fbinfo->var.yres_virtual, ud->regs,
+		irq_resource_tx->start, irq_resource_rx->start);
+
+	/*
+	 * Success
+	 */
+	return 0;
+
+fail:
+	ubicom32fb_release(dev);
+	return rc;
+}
+
+/*
+ * ubicom32fb_platform_remove
+ */
+static int ubicom32fb_platform_remove(struct platform_device *pdev)
+{
+	dev_info(&(pdev->dev), "Ubicom32 FB Driver Remove\n");
+	return ubicom32fb_release(&pdev->dev);
+}
+
+static struct platform_driver ubicom32fb_platform_driver = {
+	.probe		= ubicom32fb_platform_probe,
+	.remove		= ubicom32fb_platform_remove,
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+#ifndef MODULE
+/*
+ * ubicom32fb_setup
+ *	Process kernel boot options
+ */
+static int __init ubicom32fb_setup(char *options)
+{
+	char *this_opt;
+
+	if (!options || !*options) {
+		return 0;
+	}
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!*this_opt) {
+			continue;
+		}
+
+		if (!strncmp(this_opt, "init_value=", 10)) {
+			init_value = simple_strtoul(this_opt + 11, NULL, 0);
+			continue;
+		}
+
+		if (!strncmp(this_opt, "vram_size=", 10)) {
+			vram_size = simple_strtoul(this_opt + 10, NULL, 0);
+			continue;
+		}
+	}
+	return 0;
+}
+#endif /* MODULE */
+
+/*
+ * ubicom32fb_init
+ */
+static int __devinit ubicom32fb_init(void)
+{
+#ifndef MODULE
+	/*
+	 * Get kernel boot options (in 'video=ubicom32fb:<options>')
+	 */
+	char *option = NULL;
+
+	if (fb_get_options(DRIVER_NAME, &option)) {
+		return -ENODEV;
+	}
+	ubicom32fb_setup(option);
+#endif /* MODULE */
+
+	return platform_driver_register(&ubicom32fb_platform_driver);
+}
+module_init(ubicom32fb_init);
+
+/*
+ * ubicom32fb_exit
+ */
+static void __exit ubicom32fb_exit(void)
+{
+	platform_driver_unregister(&ubicom32fb_platform_driver);
+}
+module_exit(ubicom32fb_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick Tjin <@ubicom.com>");
+MODULE_DESCRIPTION(DRIVER_DESCRIPTION);

target/linux/ubicom32/files/drivers/video/ubicom32plio80.c

@@ -0,0 +1,780 @@
+/*
+ * drivers/video/ubicom32plio80.c
+ *	Ubicom32 80 bus PLIO buffer driver
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * This driver was based on skeletonfb.c, Skeleton for a frame buffer device by
+ * Geert Uytterhoeven.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/device.h>
+#include <linux/uaccess.h>
+#include <asm/plio.h>
+
+#define DRIVER_NAME		"ubicom32plio80"
+#define DRIVER_DESCRIPTION	"Ubicom32 80 bus PLIO frame buffer driver"
+
+#define PALETTE_ENTRIES_NO	16
+
+/*
+ * Option variables
+ *
+ * vram_size:	VRAM size in kilobytes, subject to alignment
+ */
+static int vram_size = 0;
+module_param(vram_size, int, 0);
+MODULE_PARM_DESC(vram_size, "VRAM size, in kilobytes to allocate, should be at least the size of one screen, subject to alignment");
+
+static int xres = 240;
+module_param(xres, int, 0);
+MODULE_PARM_DESC(xres, "x (horizontal) resolution");
+
+static int yres = 320;
+module_param(yres, int, 0);
+MODULE_PARM_DESC(yres, "y (vertical) resolution");
+
+static int bgr = 0;
+module_param(bgr, int, 0);
+MODULE_PARM_DESC(bgr, "display is BGR (Blue is MSB)");
+
+#define BITS_PER_PIXEL	16
+
+/*
+ * Buffer alignment, must not be 0
+ */
+#define UBICOM32PLIO80_ALIGNMENT 4
+
+/*
+ * PLIO FSM
+ *	16-bit data bus on port I
+ *	CS on EXTCTL[6]
+ *	WR on EXTCTL[4]
+ */
+static const plio_fctl_t plio_fctl = {
+	.fctl0 = {
+		.ptif_port_mode = PLIO_PORT_MODE_DI,
+		.ptif_portd_cfg = 0,
+		.ptif_porti_cfg = 3,
+		.edif_ds = 6,
+		.edif_cmp_mode = 1,
+		.ecif_extclk_ena = 0, // enable clock output on PD7 table 2.65/p111 says extctl[0]?
+		.icif_clk_src_sel = PLIO_CLK_IO,
+	},
+	.fctl2 = {
+		.icif_eclk_div = 10,
+		.icif_iclk_div = 10,
+	},
+
+	};
+
+	static const plio_config_t plio_config = {
+	.pfsm = {
+		/*
+		 * Table 12.63
+		 */
+		.grpsel[0] = {1,1,1,1,1,1,1,1,1,1},
+
+		/*
+		* Table 12.66 Counter load value
+		*/
+		.cs_lut[0] = {0,0,0,0,0,0,0,0},
+
+		/*
+		 * Table 2.75 PLIO PFSM Configuration Registers
+		 */
+		//                      3     2     1     0
+		.extctl_o_lut[0] = {0x3f, 0x2f, 0x3f, 0x3f},
+		//                      7     6     5     4
+		.extctl_o_lut[1] = {0x3f, 0x3f, 0x3f, 0x2f},
+	},
+	.edif = {
+		.odr_oe = 0xffff,
+	},
+	.ecif = {
+		.output_ena = (1 << 6) | (1 << 4),
+	},
+};
+
+static const u32_t ubicom32plio80_plio_fsm[] = {
+	// 0-F
+	0x00070007, 0x00070007,
+	0x00070007, 0x00070007,
+	0x00070007, 0x00070007,
+	0x00070007, 0x00070007,
+
+	0x16260806, 0x16260806,
+	0x16260806, 0x16260806,
+	0x16260806, 0x16260806,
+	0x16260806, 0x16260806,
+
+	// 10 - 1f
+	0x22061806, 0x22061806,
+	0x22061806, 0x22061806,
+	0x22061806, 0x22061806,
+	0x22061806, 0x22061806,
+
+	0x22061806, 0x22061806,
+	0x22061806, 0x22061806,
+	0x22061806, 0x22061806,
+	0x22061806, 0x22061806,
+
+	// 20 - 2f
+	0x00070806, 0x00070806,
+	0x00070806, 0x00070806,
+	0x00070806, 0x00070806,
+	0x00070806, 0x00070806,
+
+	0x00070806, 0x00070806,
+	0x00070806, 0x00070806,
+	0x00070806, 0x00070806,
+	0x00070806, 0x00070806,
+};
+
+/*
+ * fb_fix_screeninfo defines the non-changeable properties of the VDC, depending on what mode it is in.
+ */
+static struct fb_fix_screeninfo ubicom32plio80_fix = {
+	.id =		"Ubicom32",
+	.type =		FB_TYPE_PACKED_PIXELS,
+	.visual =	FB_VISUAL_TRUECOLOR,
+	.accel =	FB_ACCEL_UBICOM32_PLIO80,
+};
+
+/*
+ * Filled in at probe time when we find out what the hardware supports
+ */
+static struct fb_var_screeninfo ubicom32plio80_var;
+
+/*
+ * Private data structure
+ */
+struct ubicom32plio80_drvdata {
+	struct fb_info			*fbinfo;
+	bool				cmap_alloc;
+
+	/*
+	 * The address of the framebuffer in memory
+	 */
+	void				*fb;
+	void				*fb_aligned;
+
+	/*
+	 * Total size of vram including alignment allowance
+	 */
+	u32				total_vram_size;
+
+	/*
+	 * Fake palette of 16 colors
+	 */
+	u32				pseudo_palette[PALETTE_ENTRIES_NO];
+
+	int				irq_req;
+
+	/*
+	 * Current pointer and bytes left to transfer with the PLIO
+	 */
+	void				*xfer_ptr;
+	u32				bytes_to_xfer;
+	u32				busy;
+};
+
+static struct platform_device *ubicom32plio80_platform_device;
+
+/*
+ * ubicom32plio80_isr
+ */
+static int ubicom32plio80_isr(int irq, void *appdata)
+{
+	struct ubicom32plio80_drvdata *ud = (struct ubicom32plio80_drvdata *)appdata;
+
+	if (!ud->bytes_to_xfer) {
+		ubicom32_disable_interrupt(TX_FIFO_INT(PLIO_PORT));
+		PLIO_NBR->intmask.txfifo_wm = 0;
+		ud->busy = 0;
+		return IRQ_HANDLED;
+	}
+
+	asm volatile (
+		".rept 8				\n\t"
+		"move.4	(%[fifo]), (%[data])4++		\n\t"
+		".endr					\n\t"
+		: [data] "+a" (ud->xfer_ptr)
+		: [fifo] "a" (&PLIO_NBR->tx_lo)
+	);
+
+	ud->bytes_to_xfer -= 32;
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * ubicom32plio80_update
+ */
+static void ubicom32plio80_update(struct ubicom32plio80_drvdata *ud, u32 *fb)
+{
+	struct ubicom32_io_port *ri = (struct ubicom32_io_port *)RI;
+	struct ubicom32_io_port *rd = (struct ubicom32_io_port *)RD;
+
+	ud->xfer_ptr = fb;
+	ud->bytes_to_xfer = (xres * yres * 2) - 64;
+	ud->busy = 1;
+
+	ri->gpio_mask = 0;
+	rd->gpio_mask &= ~((1 << 4) | (1 << 2));
+
+	*(u32 *)(&PLIO_NBR->intclr) = ~0;
+	PLIO_NBR->intmask.txfifo_wm = 1;
+	PLIO_NBR->fifo_wm.tx = 8;
+	ubicom32_enable_interrupt(TX_FIFO_INT(PLIO_PORT));
+
+	asm volatile (
+		".rept 16				\n\t"
+		"move.4	(%[fifo]), (%[data])4++		\n\t"
+		".endr					\n\t"
+		: [data] "+a" (ud->xfer_ptr)
+		: [fifo] "a" (&PLIO_NBR->tx_lo)
+	);
+}
+
+/*
+ * ubicom32plio80_pan_display
+ *	Pans the display to a given location.  Supports only y direction panning.
+ */
+static int ubicom32plio80_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
+{
+	struct ubicom32plio80_drvdata *ud = (struct ubicom32plio80_drvdata *)fbi->par;
+	void *new_addr;
+
+	/*
+	 * Get the last y line that would be displayed.  Since we don't support YWRAP,
+	 * it must be less than our virtual y size.
+	 */
+	u32 lasty = var->yoffset + var->yres;
+	if (lasty > fbi->var.yres_virtual) {
+		/*
+		 * We would fall off the end of our frame buffer if we panned here.
+		 */
+		return -EINVAL;
+	}
+
+	if (var->xoffset) {
+		/*
+		 * We don't support panning in the x direction
+		 */
+		return -EINVAL;
+	}
+
+	/*
+	 * Everything looks sane, go ahead and pan
+	 *
+	 * We have to calculate a new address for the VDC to look at
+	 */
+	new_addr = ud->fb_aligned + (var->yoffset * fbi->fix.line_length);
+
+	return 0;
+}
+
+/*
+ * ubicom32plio80_setcolreg
+ *	Sets a color in our virtual palette
+ */
+static int ubicom32plio80_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
+{
+	u32 *palette = fbi->pseudo_palette;
+
+	if (regno >= PALETTE_ENTRIES_NO) {
+		return -EINVAL;
+	}
+
+	/*
+	 * We only use 8 bits from each color
+	 */
+	red >>= 8;
+	green >>= 8;
+	blue >>= 8;
+
+	/*
+	 * Convert any grayscale values
+	 */
+	if (fbi->var.grayscale) {
+		u16 gray = red + green + blue;
+		gray += (gray >> 2) + (gray >> 3) - (gray >> 7);
+		gray >>= 2;
+		if (gray > 255) {
+			gray = 255;
+		}
+		red = gray;
+		blue = gray;
+		green = gray;
+	}
+
+	palette[regno] = (red << fbi->var.red.offset) | (green << fbi->var.green.offset) |
+			 (blue << fbi->var.blue.offset);
+
+	return 0;
+}
+
+/*
+ * ubicom32plio80_mmap
+ */
+static int ubicom32plio80_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+	struct ubicom32plio80_drvdata *ud = (struct ubicom32plio80_drvdata *)info->par;
+
+	vma->vm_start = (unsigned long)(ud->fb_aligned);
+
+	vma->vm_end = vma->vm_start + info->fix.smem_len;
+
+	/* For those who don't understand how mmap works, go read
+	 *   Documentation/nommu-mmap.txt.
+	 * For those that do, you will know that the VM_MAYSHARE flag
+	 * must be set in the vma->vm_flags structure on noMMU
+	 *   Other flags can be set, and are documented in
+	 *   include/linux/mm.h
+	 */
+
+	vma->vm_flags |=  VM_MAYSHARE | VM_SHARED;
+
+	return 0;
+}
+
+/*
+ * ubicom32plio80_check_var
+ *	Check the var, tweak it but don't change operational parameters.
+ */
+static int ubicom32plio80_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct ubicom32plio80_drvdata *ud = (struct ubicom32plio80_drvdata *)info->par;
+	u32 line_size = var->xres * (BITS_PER_PIXEL / 8);
+
+	/*
+	 * See if we can handle this bpp
+	 */
+	if (var->bits_per_pixel > BITS_PER_PIXEL) {
+		return -EINVAL;
+	}
+	var->bits_per_pixel = BITS_PER_PIXEL;
+
+	/*
+	 * See if we have enough memory to handle this resolution
+	 */
+	if ((line_size * var->yres * BITS_PER_PIXEL / 8) > ud->total_vram_size) {
+		return -EINVAL;
+	}
+
+	var->xres_virtual = var->xres;
+	var->yres_virtual = ud->total_vram_size / line_size;
+
+	var->red.length = 5;
+	var->green.length = 6;
+	var->green.offset = 5;
+	var->blue.length = 5;
+	var->transp.offset = var->transp.length = 0;
+
+	if (bgr) {
+		var->red.offset = 0;
+		var->blue.offset = 11;
+	} else {
+		var->red.offset = 11;
+		var->blue.offset = 0;
+	}
+
+	var->nonstd = 0;
+	var->height = -1;
+	var->width = -1;
+	var->vmode = FB_VMODE_NONINTERLACED;
+	var->sync = 0;
+
+	return 0;
+}
+
+/*
+ * ubicom32plio80_set_par
+ *	Set the video mode according to info->var
+ */
+static int ubicom32plio80_set_par(struct fb_info *info)
+{
+	/*
+	 * Anything changed?
+	 */
+	if ((xres == info->var.xres) && (yres == info->var.yres)) {
+		return 0;
+	}
+
+	/*
+	 * Implement changes
+	 */
+	xres = info->var.xres;
+	yres = info->var.yres;
+	info->fix.visual = FB_VISUAL_TRUECOLOR;
+	info->fix.xpanstep = 0;
+	info->fix.ypanstep = 1;
+	info->fix.line_length = xres * (BITS_PER_PIXEL / 8);
+
+	return 0;
+}
+
+/*
+ * ubicom32plio80_ops
+ *	List of supported operations
+ */
+static struct fb_ops ubicom32plio80_ops =
+{
+	.owner			= THIS_MODULE,
+	.fb_pan_display		= ubicom32plio80_pan_display,
+	.fb_setcolreg		= ubicom32plio80_setcolreg,
+	.fb_mmap		= ubicom32plio80_mmap,
+	.fb_check_var		= ubicom32plio80_check_var,
+	.fb_set_par		= ubicom32plio80_set_par,
+	.fb_fillrect		= cfb_fillrect,
+	.fb_copyarea		= cfb_copyarea,
+	.fb_imageblit		= cfb_imageblit,
+};
+
+/*
+ * ubicom32plio80_release
+ */
+static int ubicom32plio80_release(struct device *dev)
+{
+	struct ubicom32plio80_drvdata *ud = dev_get_drvdata(dev);
+
+	unregister_framebuffer(ud->fbinfo);
+
+	if (ud->irq_req) {
+		free_irq(TX_FIFO_INT(PLIO_PORT), ud);
+	}
+	if (ud->cmap_alloc) {
+		fb_dealloc_cmap(&ud->fbinfo->cmap);
+	}
+
+	if (ud->fb) {
+		kfree(ud->fb);
+	}
+
+	framebuffer_release(ud->fbinfo);
+	dev_set_drvdata(dev, NULL);
+
+	return 0;
+}
+
+/*
+ * ubicom32plio80_platform_probe
+ */
+static int __init ubicom32plio80_platform_probe(struct platform_device *pdev)
+{
+	struct ubicom32plio80_drvdata *ud;
+	struct fb_info *fbinfo;
+	int rc;
+	size_t fbsize;
+	struct device *dev = &pdev->dev;
+	int offset;
+
+	/*
+	 * This is the minimum VRAM size
+	 */
+	fbsize = xres * yres * 2;
+	if (!vram_size) {
+		vram_size = (fbsize + 1023) / 1024;
+	} else {
+		if (fbsize > (vram_size * 1024)) {
+			dev_err(dev, "Not enough VRAM for display, need >= %u bytes\n", fbsize);
+			return -ENOMEM; // should be ebadparam?
+		}
+	}
+
+	/*
+	 * Allocate the framebuffer instance + our private data
+	 */
+	fbinfo = framebuffer_alloc(sizeof(struct ubicom32plio80_drvdata), &pdev->dev);
+	if (!fbinfo) {
+		dev_err(dev, "Not enough memory to allocate instance.\n");
+		return -ENOMEM;
+	}
+
+	/*
+	 * Fill in our private data.
+	 */
+	ud = (struct ubicom32plio80_drvdata *)fbinfo->par;
+	ud->fbinfo = fbinfo;
+	dev_set_drvdata(dev, ud);
+
+	/*
+	 * Allocate and align the requested amount of VRAM
+	 */
+	ud->total_vram_size = (vram_size * 1024) + UBICOM32PLIO80_ALIGNMENT;
+	ud->fb = kmalloc(ud->total_vram_size, GFP_KERNEL);
+	if (ud->fb == NULL) {
+		dev_err(dev, "Couldn't allocate VRAM\n");
+		rc = -ENOMEM;
+		goto fail;
+	}
+
+	offset = (u32_t)ud->fb & (UBICOM32PLIO80_ALIGNMENT - 1);
+	if (!offset) {
+		ud->fb_aligned = ud->fb;
+	} else {
+		offset =  UBICOM32PLIO80_ALIGNMENT - offset;
+		ud->fb_aligned = ud->fb + offset;
+	}
+
+	/*
+	 * Clear the entire frame buffer
+	 */
+	memset(ud->fb_aligned, 0, vram_size * 1024);
+
+	/*
+	 * Fill in the fb_var_screeninfo structure
+	 */
+	memset(&ubicom32plio80_var, 0, sizeof(ubicom32plio80_var));
+	ubicom32plio80_var.bits_per_pixel = BITS_PER_PIXEL;
+	ubicom32plio80_var.red.length = 5;
+	ubicom32plio80_var.green.length = 6;
+	ubicom32plio80_var.green.offset = 5;
+	ubicom32plio80_var.blue.length = 5;
+	ubicom32plio80_var.activate = FB_ACTIVATE_NOW;
+
+	if (bgr) {
+		ubicom32plio80_var.red.offset = 0;
+		ubicom32plio80_var.blue.offset = 11;
+	} else {
+		ubicom32plio80_var.red.offset = 11;
+		ubicom32plio80_var.blue.offset = 0;
+	}
+
+	/*
+	 * Fill in the fb_info structure
+	 */
+	ud->fbinfo->device = dev;
+	ud->fbinfo->screen_base = (void *)ud->fb_aligned;
+	ud->fbinfo->fbops = &ubicom32plio80_ops;
+	ud->fbinfo->fix = ubicom32plio80_fix;
+	ud->fbinfo->fix.smem_start = (u32)ud->fb_aligned;
+	ud->fbinfo->fix.smem_len = vram_size * 1024;
+	ud->fbinfo->fix.line_length = xres * 2;
+	ud->fbinfo->fix.mmio_start = (u32)ud;
+	ud->fbinfo->fix.mmio_len = sizeof(struct ubicom32plio80_drvdata);
+
+	/*
+	 * We support panning in the y direction only
+	 */
+	ud->fbinfo->fix.xpanstep = 0;
+	ud->fbinfo->fix.ypanstep = 1;
+
+	ud->fbinfo->pseudo_palette = ud->pseudo_palette;
+	ud->fbinfo->flags = FBINFO_DEFAULT;
+	ud->fbinfo->var = ubicom32plio80_var;
+	ud->fbinfo->var.xres = xres;
+	ud->fbinfo->var.yres = yres;
+
+	/*
+	 * We cannot pan in the X direction, so xres_virtual is xres
+	 * We can pan in the Y direction, so yres_virtual is vram_size / ud->fbinfo->fix.line_length
+	 */
+	ud->fbinfo->var.xres_virtual = xres;
+	ud->fbinfo->var.yres_virtual = (vram_size * 1024) / ud->fbinfo->fix.line_length;
+
+	/*
+	 * Allocate a color map
+	 */
+	rc = fb_alloc_cmap(&ud->fbinfo->cmap, PALETTE_ENTRIES_NO, 0);
+	if (rc) {
+		dev_err(dev, "Fail to allocate colormap (%d entries)\n",
+			PALETTE_ENTRIES_NO);
+		goto fail;
+	}
+	ud->cmap_alloc = true;
+
+	/*
+	 * Register new frame buffer
+	 */
+	rc = register_framebuffer(ud->fbinfo);
+	if (rc) {
+		dev_err(dev, "Could not register frame buffer\n");
+		goto fail;
+	}
+
+	/*
+	 * request the PLIO IRQ
+	 */
+	rc = request_irq(TX_FIFO_INT(PLIO_PORT), ubicom32plio80_isr, IRQF_DISABLED, "ubicom32plio80", ud);
+	if (rc) {
+		dev_err(dev, "Could not request IRQ\n");
+		goto fail;
+	}
+	ud->irq_req = 1;
+
+	/*
+	 * Clear any garbage out of the TX FIFOs (idif_txfifo_flush)
+	 *
+	 * cast through ubicom32_io_port to make sure the compiler does a word write
+	 */
+	((struct ubicom32_io_port *)PLIO_NBR)->int_set = (1 << 18);
+
+	/*
+	 * Start up the state machine
+	 */
+	plio_init(&plio_fctl, &plio_config, (plio_sram_t *)ubicom32plio80_plio_fsm, sizeof(ubicom32plio80_plio_fsm));
+	PLIO_NBR->fctl0.pfsm_cmd = 0;
+
+	ubicom32plio80_update(ud, ud->fb_aligned);
+
+	/*
+	 * Tell the log we are here
+	 */
+	dev_info(dev, "fbaddr=%p align=%p, size=%uKB screen(%ux%u) virt(%ux%u)\n",
+		ud->fb, ud->fb_aligned, vram_size, ud->fbinfo->var.xres, ud->fbinfo->var.yres,
+		ud->fbinfo->var.xres_virtual, ud->fbinfo->var.yres_virtual);
+
+	/*
+	 * Success
+	 */
+	return 0;
+
+fail:
+	ubicom32plio80_release(dev);
+	return rc;
+}
+
+/*
+ * ubicom32plio80_platform_remove
+ */
+static int ubicom32plio80_platform_remove(struct platform_device *pdev)
+{
+	dev_info(&(pdev->dev), "Ubicom32 FB Driver Remove\n");
+	return ubicom32plio80_release(&pdev->dev);
+}
+
+static struct platform_driver ubicom32plio80_platform_driver = {
+	.probe		= ubicom32plio80_platform_probe,
+	.remove		= ubicom32plio80_platform_remove,
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+#ifndef MODULE
+/*
+ * ubicom32plio80_setup
+ *	Process kernel boot options
+ */
+static int __init ubicom32plio80_setup(char *options)
+{
+	char *this_opt;
+
+	if (!options || !*options) {
+		return 0;
+	}
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!*this_opt) {
+			continue;
+		}
+
+		if (!strncmp(this_opt, "vram_size=", 10)) {
+			vram_size = simple_strtoul(this_opt + 10, NULL, 0);
+			continue;
+		}
+
+		if (!strncmp(this_opt, "bgr=", 4)) {
+			bgr = simple_strtoul(this_opt + 4, NULL, 0);
+			continue;
+		}
+
+		if (!strncmp(this_opt, "xres=", 5)) {
+			xres = simple_strtoul(this_opt + 5, NULL, 0);
+			continue;
+		}
+
+		if (!strncmp(this_opt, "yres=", 5)) {
+			yres = simple_strtoul(this_opt + 5, NULL, 0);
+			continue;
+		}
+	}
+	return 0;
+}
+#endif /* MODULE */
+
+/*
+ * ubicom32plio80_init
+ */
+static int __devinit ubicom32plio80_init(void)
+{
+	int ret;
+
+#ifndef MODULE
+	/*
+	 * Get kernel boot options (in 'video=ubicom32plio80:<options>')
+	 */
+	char *option = NULL;
+
+	if (fb_get_options(DRIVER_NAME, &option)) {
+		return -ENODEV;
+	}
+	ubicom32plio80_setup(option);
+#endif /* MODULE */
+
+	ret = platform_driver_register(&ubicom32plio80_platform_driver);
+
+	if (!ret) {
+		ubicom32plio80_platform_device = platform_device_alloc(DRIVER_NAME, 0);
+
+		if (ubicom32plio80_platform_device)
+			ret = platform_device_add(ubicom32plio80_platform_device);
+		else
+			ret = -ENOMEM;
+
+		if (ret) {
+			platform_device_put(ubicom32plio80_platform_device);
+			platform_driver_unregister(&ubicom32plio80_platform_driver);
+		}
+	}
+
+	return ret;
+}
+module_init(ubicom32plio80_init);
+
+/*
+ * ubicom32plio80_exit
+ */
+static void __exit ubicom32plio80_exit(void)
+{
+	platform_device_unregister(ubicom32plio80_platform_device);
+	platform_driver_unregister(&ubicom32plio80_platform_driver);
+}
+module_exit(ubicom32plio80_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick Tjin <@ubicom.com>");
+MODULE_DESCRIPTION(DRIVER_DESCRIPTION);

target/linux/ubicom32/files/drivers/video/ubicom32vfb.c

@@ -0,0 +1,603 @@
+/*
+ * drivers/video/ubicom32vfb.c
+ *	Ubicom32 virtual frame buffer driver
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * This driver was based on skeletonfb.c, Skeleton for a frame buffer device by
+ * Geert Uytterhoeven.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/device.h>
+#include <linux/uaccess.h>
+
+#define DRIVER_NAME		"ubicom32vfb"
+#define DRIVER_DESCRIPTION	"Ubicom32 virtual frame buffer driver"
+
+#define PALETTE_ENTRIES_NO	16
+
+/*
+ * Option variables
+ *
+ * vram_size:	VRAM size in kilobytes, subject to alignment
+ */
+static int vram_size = 0;
+module_param(vram_size, int, 0);
+MODULE_PARM_DESC(vram_size, "VRAM size, in kilobytes to allocate, should be at least the size of one screen, subject to alignment");
+
+static int xres = 320;
+module_param(xres, int, 0);
+MODULE_PARM_DESC(xres, "x (horizontal) resolution");
+
+static int yres = 240;
+module_param(yres, int, 0);
+MODULE_PARM_DESC(yres, "y (vertical) resolution");
+
+static int bgr = 0;
+module_param(bgr, int, 0);
+MODULE_PARM_DESC(bgr, "display is BGR (Blue is MSB)");
+
+#define BITS_PER_PIXEL	16
+
+/*
+ * Buffer alignment, must not be 0
+ */
+#define UBICOM32VFB_ALIGNMENT 4
+
+/*
+ * fb_fix_screeninfo defines the non-changeable properties of the VDC, depending on what mode it is in.
+ */
+static struct fb_fix_screeninfo ubicom32vfb_fix = {
+	.id =		"Ubicom32",
+	.type =		FB_TYPE_PACKED_PIXELS,
+	.visual =	FB_VISUAL_TRUECOLOR,
+	.accel =	FB_ACCEL_UBICOM32_VFB,
+};
+
+/*
+ * Filled in at probe time when we find out what the hardware supports
+ */
+static struct fb_var_screeninfo ubicom32vfb_var;
+
+/*
+ * Private data structure
+ */
+struct ubicom32vfb_drvdata {
+	struct fb_info			*fbinfo;
+	bool				cmap_alloc;
+
+	/*
+	 * The address of the framebuffer in memory
+	 */
+	void				*fb;
+	void				*fb_aligned;
+
+	/*
+	 * Total size of vram including alignment allowance
+	 */
+	u32				total_vram_size;
+
+	/*
+	 * Fake palette of 16 colors
+	 */
+	u32				pseudo_palette[PALETTE_ENTRIES_NO];
+};
+
+static struct platform_device *ubicom32vfb_platform_device;
+
+/*
+ * ubicom32vfb_pan_display
+ *	Pans the display to a given location.  Supports only y direction panning.
+ */
+static int ubicom32vfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
+{
+	struct ubicom32vfb_drvdata *ud = (struct ubicom32vfb_drvdata *)fbi->par;
+	void *new_addr;
+
+	/*
+	 * Get the last y line that would be displayed.  Since we don't support YWRAP,
+	 * it must be less than our virtual y size.
+	 */
+	u32 lasty = var->yoffset + var->yres;
+	if (lasty > fbi->var.yres_virtual) {
+		/*
+		 * We would fall off the end of our frame buffer if we panned here.
+		 */
+		return -EINVAL;
+	}
+
+	if (var->xoffset) {
+		/*
+		 * We don't support panning in the x direction
+		 */
+		return -EINVAL;
+	}
+
+	/*
+	 * Everything looks sane, go ahead and pan
+	 *
+	 * We have to calculate a new address for the VDC to look at
+	 */
+	new_addr = ud->fb_aligned + (var->yoffset * fbi->fix.line_length);
+
+	return 0;
+}
+
+/*
+ * ubicom32vfb_setcolreg
+ *	Sets a color in our virtual palette
+ */
+static int ubicom32vfb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
+{
+	u32 *palette = fbi->pseudo_palette;
+
+	if (regno >= PALETTE_ENTRIES_NO) {
+		return -EINVAL;
+	}
+
+	/*
+	 * We only use 8 bits from each color
+	 */
+	red >>= 8;
+	green >>= 8;
+	blue >>= 8;
+
+	/*
+	 * Convert any grayscale values
+	 */
+	if (fbi->var.grayscale) {
+		u16 gray = red + green + blue;
+		gray += (gray >> 2) + (gray >> 3) - (gray >> 7);
+		gray >>= 2;
+		if (gray > 255) {
+			gray = 255;
+		}
+		red = gray;
+		blue = gray;
+		green = gray;
+	}
+
+	palette[regno] = (red << fbi->var.red.offset) | (green << fbi->var.green.offset) |
+			 (blue << fbi->var.blue.offset);
+
+	return 0;
+}
+
+/*
+ * ubicom32vfb_mmap
+ */
+static int ubicom32vfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
+{
+	struct ubicom32vfb_drvdata *ud = (struct ubicom32vfb_drvdata *)info->par;
+
+	vma->vm_start = (unsigned long)(ud->fb_aligned);
+
+	vma->vm_end = vma->vm_start + info->fix.smem_len;
+
+	/* For those who don't understand how mmap works, go read
+	 *   Documentation/nommu-mmap.txt.
+	 * For those that do, you will know that the VM_MAYSHARE flag
+	 * must be set in the vma->vm_flags structure on noMMU
+	 *   Other flags can be set, and are documented in
+	 *   include/linux/mm.h
+	 */
+
+	vma->vm_flags |=  VM_MAYSHARE | VM_SHARED;
+
+	return 0;
+}
+
+/*
+ * ubicom32vfb_check_var
+ *	Check the var, tweak it but don't change operational parameters.
+ */
+static int ubicom32vfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct ubicom32vfb_drvdata *ud = (struct ubicom32vfb_drvdata *)info->par;
+	u32 line_size = var->xres * (BITS_PER_PIXEL / 8);
+
+	/*
+	 * See if we can handle this bpp
+	 */
+	if (var->bits_per_pixel > BITS_PER_PIXEL) {
+		return -EINVAL;
+	}
+	var->bits_per_pixel = BITS_PER_PIXEL;
+
+	/*
+	 * See if we have enough memory to handle this resolution
+	 */
+	if ((line_size * var->yres * BITS_PER_PIXEL / 8) > ud->total_vram_size) {
+		return -EINVAL;
+	}
+
+	var->xres_virtual = var->xres;
+	var->yres_virtual = ud->total_vram_size / line_size;
+
+	var->red.length = 5;
+	var->green.length = 6;
+	var->green.offset = 5;
+	var->blue.length = 5;
+	var->transp.offset = var->transp.length = 0;
+
+	if (bgr) {
+		var->red.offset = 0;
+		var->blue.offset = 11;
+	} else {
+		var->red.offset = 11;
+		var->blue.offset = 0;
+	}
+
+	var->nonstd = 0;
+	var->height = -1;
+	var->width = -1;
+	var->vmode = FB_VMODE_NONINTERLACED;
+	var->sync = 0;
+
+	return 0;
+}
+
+/*
+ * ubicom32vfb_set_par
+ *	Set the video mode according to info->var
+ */
+static int ubicom32vfb_set_par(struct fb_info *info)
+{
+	/*
+	 * Anything changed?
+	 */
+	if ((xres == info->var.xres) && (yres == info->var.yres)) {
+		return 0;
+	}
+
+	/*
+	 * Implement changes
+	 */
+	xres = info->var.xres;
+	yres = info->var.yres;
+	info->fix.visual = FB_VISUAL_TRUECOLOR;
+	info->fix.xpanstep = 0;
+	info->fix.ypanstep = 1;
+	info->fix.line_length = xres * (BITS_PER_PIXEL / 8);
+
+	return 0;
+}
+
+/*
+ * ubicom32vfb_ops
+ *	List of supported operations
+ */
+static struct fb_ops ubicom32vfb_ops =
+{
+	.owner			= THIS_MODULE,
+	.fb_pan_display		= ubicom32vfb_pan_display,
+	.fb_setcolreg		= ubicom32vfb_setcolreg,
+	.fb_mmap		= ubicom32vfb_mmap,
+	.fb_check_var		= ubicom32vfb_check_var,
+	.fb_set_par		= ubicom32vfb_set_par,
+	.fb_fillrect		= cfb_fillrect,
+	.fb_copyarea		= cfb_copyarea,
+	.fb_imageblit		= cfb_imageblit,
+};
+
+/*
+ * ubicom32vfb_release
+ */
+static int ubicom32vfb_release(struct device *dev)
+{
+	struct ubicom32vfb_drvdata *ud = dev_get_drvdata(dev);
+
+	unregister_framebuffer(ud->fbinfo);
+
+	if (ud->cmap_alloc) {
+		fb_dealloc_cmap(&ud->fbinfo->cmap);
+	}
+
+	if (ud->fb) {
+		kfree(ud->fb);
+	}
+
+	framebuffer_release(ud->fbinfo);
+	dev_set_drvdata(dev, NULL);
+
+	return 0;
+}
+
+/*
+ * ubicom32vfb_platform_probe
+ */
+static int __init ubicom32vfb_platform_probe(struct platform_device *pdev)
+{
+	struct ubicom32vfb_drvdata *ud;
+	struct fb_info *fbinfo;
+	int rc;
+	size_t fbsize;
+	struct device *dev = &pdev->dev;
+	int offset;
+
+	/*
+	 * This is the minimum VRAM size
+	 */
+	fbsize = xres * yres * 2;
+	if (!vram_size) {
+		vram_size = (fbsize + 1023) / 1024;
+	} else {
+		if (fbsize > (vram_size * 1024)) {
+			dev_err(dev, "Not enough VRAM for display, need >= %u bytes\n", fbsize);
+			return -ENOMEM; // should be ebadparam?
+		}
+	}
+
+	/*
+	 * Allocate the framebuffer instance + our private data
+	 */
+	fbinfo = framebuffer_alloc(sizeof(struct ubicom32vfb_drvdata), &pdev->dev);
+	if (!fbinfo) {
+		dev_err(dev, "Not enough memory to allocate instance.\n");
+		return -ENOMEM;
+	}
+
+	/*
+	 * Fill in our private data.
+	 */
+	ud = (struct ubicom32vfb_drvdata *)fbinfo->par;
+	ud->fbinfo = fbinfo;
+	dev_set_drvdata(dev, ud);
+
+	/*
+	 * Allocate and align the requested amount of VRAM
+	 */
+	ud->total_vram_size = (vram_size * 1024) + UBICOM32VFB_ALIGNMENT;
+	ud->fb = kmalloc(ud->total_vram_size, GFP_KERNEL);
+	if (ud->fb == NULL) {
+		dev_err(dev, "Couldn't allocate VRAM\n");
+		rc = -ENOMEM;
+		goto fail;
+	}
+
+	offset = (u32_t)ud->fb & (UBICOM32VFB_ALIGNMENT - 1);
+	if (!offset) {
+		ud->fb_aligned = ud->fb;
+	} else {
+		offset =  UBICOM32VFB_ALIGNMENT - offset;
+		ud->fb_aligned = ud->fb + offset;
+	}
+
+	/*
+	 * Clear the entire frame buffer
+	 */
+	memset(ud->fb_aligned, 0, vram_size * 1024);
+
+	/*
+	 * Fill in the fb_var_screeninfo structure
+	 */
+	memset(&ubicom32vfb_var, 0, sizeof(ubicom32vfb_var));
+	ubicom32vfb_var.bits_per_pixel = BITS_PER_PIXEL;
+	ubicom32vfb_var.red.length = 5;
+	ubicom32vfb_var.green.length = 6;
+	ubicom32vfb_var.green.offset = 5;
+	ubicom32vfb_var.blue.length = 5;
+	ubicom32vfb_var.activate = FB_ACTIVATE_NOW;
+
+	if (bgr) {
+		ubicom32vfb_var.red.offset = 0;
+		ubicom32vfb_var.blue.offset = 11;
+	} else {
+		ubicom32vfb_var.red.offset = 11;
+		ubicom32vfb_var.blue.offset = 0;
+	}
+
+	/*
+	 * Fill in the fb_info structure
+	 */
+	ud->fbinfo->device = dev;
+	ud->fbinfo->screen_base = (void *)ud->fb_aligned;
+	ud->fbinfo->fbops = &ubicom32vfb_ops;
+	ud->fbinfo->fix = ubicom32vfb_fix;
+	ud->fbinfo->fix.smem_start = (u32)ud->fb_aligned;
+	ud->fbinfo->fix.smem_len = vram_size * 1024;
+	ud->fbinfo->fix.line_length = xres * 2;
+	ud->fbinfo->fix.mmio_start = (u32)ud;
+	ud->fbinfo->fix.mmio_len = sizeof(struct ubicom32vfb_drvdata);
+
+	/*
+	 * We support panning in the y direction only
+	 */
+	ud->fbinfo->fix.xpanstep = 0;
+	ud->fbinfo->fix.ypanstep = 1;
+
+	ud->fbinfo->pseudo_palette = ud->pseudo_palette;
+	ud->fbinfo->flags = FBINFO_DEFAULT;
+	ud->fbinfo->var = ubicom32vfb_var;
+	ud->fbinfo->var.xres = xres;
+	ud->fbinfo->var.yres = yres;
+
+	/*
+	 * We cannot pan in the X direction, so xres_virtual is xres
+	 * We can pan in the Y direction, so yres_virtual is vram_size / ud->fbinfo->fix.line_length
+	 */
+	ud->fbinfo->var.xres_virtual = xres;
+	ud->fbinfo->var.yres_virtual = (vram_size * 1024) / ud->fbinfo->fix.line_length;
+
+	/*
+	 * Allocate a color map
+	 */
+	rc = fb_alloc_cmap(&ud->fbinfo->cmap, PALETTE_ENTRIES_NO, 0);
+	if (rc) {
+		dev_err(dev, "Fail to allocate colormap (%d entries)\n",
+			PALETTE_ENTRIES_NO);
+		goto fail;
+	}
+	ud->cmap_alloc = true;
+
+	/*
+	 * Register new frame buffer
+	 */
+	rc = register_framebuffer(ud->fbinfo);
+	if (rc) {
+		dev_err(dev, "Could not register frame buffer\n");
+		goto fail;
+	}
+
+	/*
+	 * Tell the log we are here
+	 */
+	dev_info(dev, "fbaddr=%p align=%p, size=%uKB screen(%ux%u) virt(%ux%u)\n",
+		ud->fb, ud->fb_aligned, vram_size, ud->fbinfo->var.xres, ud->fbinfo->var.yres,
+		ud->fbinfo->var.xres_virtual, ud->fbinfo->var.yres_virtual);
+
+	/*
+	 * Success
+	 */
+	return 0;
+
+fail:
+	ubicom32vfb_release(dev);
+	return rc;
+}
+
+/*
+ * ubicom32vfb_platform_remove
+ */
+static int ubicom32vfb_platform_remove(struct platform_device *pdev)
+{
+	dev_info(&(pdev->dev), "Ubicom32 FB Driver Remove\n");
+	return ubicom32vfb_release(&pdev->dev);
+}
+
+static struct platform_driver ubicom32vfb_platform_driver = {
+	.probe		= ubicom32vfb_platform_probe,
+	.remove		= ubicom32vfb_platform_remove,
+	.driver = {
+		.name = DRIVER_NAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+#ifndef MODULE
+/*
+ * ubicom32vfb_setup
+ *	Process kernel boot options
+ */
+static int __init ubicom32vfb_setup(char *options)
+{
+	char *this_opt;
+
+	if (!options || !*options) {
+		return 0;
+	}
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!*this_opt) {
+			continue;
+		}
+
+		if (!strncmp(this_opt, "vram_size=", 10)) {
+			vram_size = simple_strtoul(this_opt + 10, NULL, 0);
+			continue;
+		}
+
+		if (!strncmp(this_opt, "bgr=", 4)) {
+			bgr = simple_strtoul(this_opt + 4, NULL, 0);
+			continue;
+		}
+
+		if (!strncmp(this_opt, "xres=", 5)) {
+			xres = simple_strtoul(this_opt + 5, NULL, 0);
+			continue;
+		}
+
+		if (!strncmp(this_opt, "yres=", 5)) {
+			yres = simple_strtoul(this_opt + 5, NULL, 0);
+			continue;
+		}
+	}
+	return 0;
+}
+#endif /* MODULE */
+
+/*
+ * ubicom32vfb_init
+ */
+static int __devinit ubicom32vfb_init(void)
+{
+	int ret;
+
+#ifndef MODULE
+	/*
+	 * Get kernel boot options (in 'video=ubicom32vfb:<options>')
+	 */
+	char *option = NULL;
+
+	if (fb_get_options(DRIVER_NAME, &option)) {
+		return -ENODEV;
+	}
+	ubicom32vfb_setup(option);
+#endif /* MODULE */
+
+	ret = platform_driver_register(&ubicom32vfb_platform_driver);
+
+#ifdef CONFIG_FB_UBICOM32_VIRTUAL_NOAUTO
+	return ret;
+#else
+	if (!ret) {
+		ubicom32vfb_platform_device = platform_device_alloc(DRIVER_NAME, 0);
+
+		if (ubicom32vfb_platform_device)
+			ret = platform_device_add(ubicom32vfb_platform_device);
+		else
+			ret = -ENOMEM;
+
+		if (ret) {
+			platform_device_put(ubicom32vfb_platform_device);
+			platform_driver_unregister(&ubicom32vfb_platform_driver);
+		}
+	}
+
+	return ret;
+#endif
+}
+module_init(ubicom32vfb_init);
+
+/*
+ * ubicom32vfb_exit
+ */
+static void __exit ubicom32vfb_exit(void)
+{
+	platform_device_unregister(ubicom32vfb_platform_device);
+	platform_driver_unregister(&ubicom32vfb_platform_driver);
+}
+module_exit(ubicom32vfb_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Patrick Tjin <@ubicom.com>");
+MODULE_DESCRIPTION(DRIVER_DESCRIPTION);

target/linux/ubicom32/files/drivers/watchdog/ubi32_wdt.c

@@ -0,0 +1,630 @@
+/*
+ * drivers/watchdog/ubi32_wdt.c
+ *   Ubicom32 Watchdog Driver
+ *
+ * Originally based on softdog.c
+ * Copyright 2006-2007 Analog Devices Inc.
+ * Copyright 2006-2007 Michele d'Amico
+ * Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/types.h>
+#include <linux/timer.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/fs.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/uaccess.h>
+#include <asm/ip5000.h>
+
+#define WATCHDOG_NAME "ubi32-wdt"
+#define PFX WATCHDOG_NAME ": "
+
+#define OSC1_FREQ 12000000
+#define WATCHDOG_SEC_TO_CYC(x) (OSC1_FREQ * (x))
+#define WATCHDOG_MAX_SEC (0xffffffff / OSC1_FREQ)
+
+#define MIN_PROCESSOR_ADDRESS 0x03000000
+
+static DEFINE_SPINLOCK(ubi32_wdt_spinlock);
+
+#define WATCHDOG_TIMEOUT 20
+
+#if defined(CONFIG_WATCHDOG_NOWAYOUT)
+#define WATCHDOG_NOWAYOUT 1
+#else
+#define WATCHDOG_NOWAYOUT 0
+#endif
+
+static unsigned int timeout = WATCHDOG_TIMEOUT;
+static int nowayout = WATCHDOG_NOWAYOUT;
+static struct watchdog_info ubi32_wdt_info;
+static unsigned long open_check;
+static char expect_close;
+
+#if !defined(CONFIG_SMP)
+#define UBI32_WDT_LOCK(lock, flags) local_irq_save(flags)
+#define UBI32_WDT_UNLOCK(lock, flags) local_irq_restore(flags)
+#define UBI32_WDT_LOCK_CHECK()
+#else
+#define UBI32_WDT_LOCK(lock, flags) spin_lock_irqsave((lock), (flags));
+#define UBI32_WDT_UNLOCK(lock, flags) spin_unlock_irqrestore((lock), (flags));
+#define UBI32_WDT_LOCK_CHECK() BUG_ON(!spin_is_locked(&ubi32_wdt_spinlock));
+#endif
+
+/*
+ * ubi32_wdt_remaining()
+ * 	Return the approximate number of seconds remaining
+ */
+static int ubi32_wdt_remaining(void)
+{
+	int compare;
+	int curr;
+
+	UBI32_WDT_LOCK_CHECK();
+
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, TIMER_TKEYVAL);
+	compare = ubicom32_read_reg(&UBICOM32_IO_TIMER->wdcom);
+	curr = ubicom32_read_reg(&UBICOM32_IO_TIMER->mptval);
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, 0);
+	return (compare - curr) / OSC1_FREQ;
+
+}
+
+/*
+ * ubi32_wdt_keepalive()
+ *	Keep the Userspace Watchdog Alive
+ *
+ * The Userspace watchdog got a KeepAlive: schedule the next timeout.
+ */
+static int ubi32_wdt_keepalive(void)
+{
+	UBI32_WDT_LOCK_CHECK();
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, TIMER_TKEYVAL);
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->wdcom,
+			ubicom32_read_reg(&UBICOM32_IO_TIMER->mptval)
+			+ WATCHDOG_SEC_TO_CYC(timeout));
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, 0);
+	return 0;
+}
+
+/*
+ * ubi32_wdt_stop()
+ *	Stop the on-chip Watchdog
+ */
+static int ubi32_wdt_stop(void)
+{
+	UBI32_WDT_LOCK_CHECK();
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, TIMER_TKEYVAL);
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->wdcfg, TIMER_WATCHDOG_DISABLE);
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, 0);
+	return 0;
+}
+
+/*
+ * ubi32_wdt_start()
+ *	Start the on-chip Watchdog
+ */
+static int ubi32_wdt_start(void)
+{
+	UBI32_WDT_LOCK_CHECK();
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, TIMER_TKEYVAL);
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->wdcom,
+			ubicom32_read_reg(&UBICOM32_IO_TIMER->mptval)
+			+ WATCHDOG_SEC_TO_CYC(timeout));
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->wdcfg, ~TIMER_WATCHDOG_DISABLE);
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, 0);
+	return 0;
+}
+
+/*
+ * ubi32_wdt_running()
+ * 	Return true if the watchdog is configured
+ */
+static int ubi32_wdt_running(void)
+{
+	int enabled;
+
+	UBI32_WDT_LOCK_CHECK();
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, TIMER_TKEYVAL);
+	enabled = ubicom32_read_reg(&UBICOM32_IO_TIMER->wdcfg) == ~TIMER_WATCHDOG_DISABLE;
+	ubicom32_write_reg(&UBICOM32_IO_TIMER->tkey, 0);
+	return enabled;
+}
+
+/*
+ * ubi32_wdt_set_timeout()
+ *	Set the Userspace Watchdog timeout
+ *
+ * - @t: new timeout value (in seconds)
+ */
+static int ubi32_wdt_set_timeout(unsigned long t)
+{
+	UBI32_WDT_LOCK_CHECK();
+
+	if (t > WATCHDOG_MAX_SEC) {
+		printk(KERN_WARNING PFX "request to large: %ld [1-%d] sec)\n", t, WATCHDOG_MAX_SEC);
+		return -EINVAL;
+	}
+
+	/*
+	 * If we are running, then reset the time value so
+	 * that the new value has an immediate effect.
+	 */
+	timeout = t;
+	if (ubi32_wdt_running()) {
+		ubi32_wdt_keepalive();
+	}
+	return 0;
+}
+
+/*
+ * ubi32_wdt_open()
+ *	Open the Device
+ */
+static int ubi32_wdt_open(struct inode *inode, struct file *file)
+{
+	unsigned long flags;
+
+	if (test_and_set_bit(0, &open_check))
+		return -EBUSY;
+
+	if (nowayout)
+		__module_get(THIS_MODULE);
+
+	spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+	ubi32_wdt_start();
+	spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+
+	return nonseekable_open(inode, file);
+}
+
+/*
+ * ubi32_wdt_close()
+ *	Close the Device
+ */
+static int ubi32_wdt_release(struct inode *inode, struct file *file)
+{
+	unsigned long flags;
+
+	/*
+	 * If we don't expect a close, then the watchdog continues
+	 * even though the device is closed.  The caller will have
+	 * a full timeout value to reopen the device and continue
+	 * stroking it.
+	 */
+	if (expect_close != 42) {
+		printk(KERN_CRIT PFX
+			"Unexpected close, not stopping watchdog!\n");
+		spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+		ubi32_wdt_keepalive();
+		spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+	} else {
+		spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+		ubi32_wdt_stop();
+		spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+	}
+
+	expect_close = 0;
+	clear_bit(0, &open_check);
+	return 0;
+}
+
+/*
+ * ubi32_wdt_write()
+ *	Write to Device
+ *
+ * If the user writes nothing, nothing happens.
+ * If the user writes a V, then we expect a close and allow a release.
+ * If the user writes anything else, it is ignored.
+ */
+static ssize_t ubi32_wdt_write(struct file *file, const char __user *data,
+						size_t len, loff_t *ppos)
+{
+	size_t i;
+	unsigned long flags;
+
+	/*
+	 * Every write resets the expect_close.  The last write
+	 * must be a V to allow shutdown on close.
+	 */
+	expect_close = 0;
+
+	/*
+	 * Empty writes still ping.
+	 */
+	if (!len) {
+		goto ping;
+	}
+
+	/*
+	 * If nowayout is set, it does not matter if the caller
+	 * is trying to send the magic 'V' we will not allow a
+	 * close to stop us.
+	 */
+	if (nowayout) {
+		goto ping;
+	}
+
+	/*
+	 * See if the program wrote a 'V' and if so disable
+	 * the watchdog on release.
+	 */
+	for (i = 0; i < len; i++) {
+		char c;
+		if (get_user(c, data + i)) {
+			return -EFAULT;
+		}
+
+		if (c == 'V') {
+			expect_close = 42;
+		}
+	}
+
+ping:
+	spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+	ubi32_wdt_keepalive();
+	spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+	return len;
+}
+
+/*
+ * ubi32_wdt_ioctl()
+ *	Query the watchdog device.
+ *
+ * Query basic information from the device or ping it, as outlined by the
+ * watchdog API.
+ */
+static long ubi32_wdt_ioctl(struct file *file,
+				unsigned int cmd, unsigned long arg)
+{
+	void __user *argp = (void __user *)arg;
+	int __user *p = argp;
+
+	switch (cmd) {
+	case WDIOC_GETSUPPORT:
+		if (copy_to_user(argp, &ubi32_wdt_info, sizeof(ubi32_wdt_info))) {
+			return -EFAULT;
+		}
+		return 0;
+
+	case WDIOC_GETSTATUS: {
+		unsigned long flags;
+		int running;
+
+		spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+		running = ubi32_wdt_running();
+		spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+		return running;
+	}
+
+	case WDIOC_GETBOOTSTATUS:
+		return ubicom32_get_reset_reason();
+
+	case WDIOC_SETOPTIONS: {
+		unsigned long flags;
+		int options, ret = -EINVAL;
+
+		/*
+		 * The sample application does not pass a pointer
+		 * but directly passes a value of 1 or 2; however
+		 * all of the implementations (and thus probably
+		 * the real applications) pass a pointer to a value.
+		 *
+		 * It should be noted that  WDIOC_SETOPTIONS is defined as
+		 * _IOR(WATCHDOG_IOCTL_BASE, 4, int), which means
+		 * that it should be an int and NOT a pointer.
+		 *
+		 * TODO: Examine this code for future chips.
+		 * TODO: Report the sample code defect.
+		 */
+		if ((int)p < MIN_PROCESSOR_ADDRESS) {
+			options = (int)p;
+		} else {
+			if (get_user(options, p))
+			return -EFAULT;
+		}
+
+		spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+		if (options & WDIOS_DISABLECARD) {
+			ubi32_wdt_stop();
+			ret = 0;
+		}
+		if (options & WDIOS_ENABLECARD) {
+			ubi32_wdt_start();
+			ret = 0;
+		}
+		spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+		return ret;
+	}
+
+	case WDIOC_KEEPALIVE: {
+		unsigned long flags;
+
+		spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+		ubi32_wdt_keepalive();
+		spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+		return 0;
+	}
+
+	case WDIOC_SETTIMEOUT: {
+		int new_timeout;
+		unsigned long flags;
+		int ret  = 0;
+
+		if (get_user(new_timeout, p))
+			return -EFAULT;
+
+		spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+		ret = ubi32_wdt_set_timeout(new_timeout);
+		spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+		return ret;
+
+	}
+
+	case WDIOC_GETTIMEOUT:
+		return put_user(timeout, p);
+
+	case WDIOC_GETTIMELEFT: {
+		unsigned long flags;
+		int remaining = 0;
+
+		spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+		remaining = ubi32_wdt_remaining();
+		spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+		return put_user(remaining, p);
+	}
+
+	default:
+		return -ENOTTY;
+	}
+}
+
+/*
+ * ubi32_wdt_notify_sys()
+ *	Notification callback function for system events.
+ *
+ * Turn off the watchdog during a SYS_DOWN or SYS_HALT.
+ */
+static int ubi32_wdt_notify_sys(struct notifier_block *this,
+					unsigned long code, void *unused)
+{
+	if (code == SYS_DOWN || code == SYS_HALT) {
+		unsigned long flags;
+
+		spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+		ubi32_wdt_stop();
+		spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+	}
+
+	return NOTIFY_DONE;
+}
+
+#ifdef CONFIG_PM
+static int state_before_suspend;
+
+/*
+ * ubi32_wdt_suspend()
+ * 	suspend the watchdog
+ *
+ * Remember if the watchdog was running and stop it.
+ */
+static int ubi32_wdt_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+	state_before_suspend = ubi32_wdt_running();
+	ubi32_wdt_stop();
+	spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+
+	return 0;
+}
+
+/*
+ * ubi32_wdt_resume()
+ * 	Resume the watchdog
+ *
+ * If the watchdog was running, turn it back on.
+ */
+static int ubi32_wdt_resume(struct platform_device *pdev)
+{
+	if (state_before_suspend) {
+		unsigned long flags;
+		spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+		ubi32_wdt_set_timeout(timeout);
+		ubi32_wdt_start();
+		spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+	}
+
+	return 0;
+}
+#else
+# define ubi32_wdt_suspend NULL
+# define ubi32_wdt_resume NULL
+#endif
+
+static const struct file_operations ubi32_wdt_fops = {
+	.owner		= THIS_MODULE,
+	.llseek		= no_llseek,
+	.write    	= ubi32_wdt_write,
+	.unlocked_ioctl	= ubi32_wdt_ioctl,
+	.open		= ubi32_wdt_open,
+	.release	= ubi32_wdt_release,
+};
+
+static struct miscdevice ubi32_wdt_miscdev = {
+	.minor    = WATCHDOG_MINOR,
+	.name     = "watchdog",
+	.fops     = &ubi32_wdt_fops,
+};
+
+static struct watchdog_info ubi32_wdt_info = {
+	.identity = "Ubicom32 Watchdog",
+	.options  = WDIOF_SETTIMEOUT |
+		    WDIOF_KEEPALIVEPING |
+		    WDIOF_MAGICCLOSE,
+};
+
+static struct notifier_block ubi32_wdt_notifier = {
+	.notifier_call = ubi32_wdt_notify_sys,
+};
+
+/*
+ * ubi32_wdt_probe()
+ * 	Probe/register the watchdog module
+ *
+ * Registers the misc device and notifier handler.  Actual device
+ * initialization is handled by ubi32_wdt_open().
+ */
+static int __devinit ubi32_wdt_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	ret = register_reboot_notifier(&ubi32_wdt_notifier);
+	if (ret) {
+		printk(KERN_ERR PFX
+			"cannot register reboot notifier (err=%d)\n", ret);
+		return ret;
+	}
+
+	ret = misc_register(&ubi32_wdt_miscdev);
+	if (ret) {
+		printk(KERN_ERR PFX
+			"cannot register miscdev on minor=%d (err=%d)\n",
+				WATCHDOG_MINOR, ret);
+		unregister_reboot_notifier(&ubi32_wdt_notifier);
+		return ret;
+	}
+
+	printk(KERN_INFO PFX "initialized: timeout=%d sec (nowayout=%d)\n",
+	       timeout, nowayout);
+
+	return 0;
+}
+
+/*
+ * ubi32_wdt_remove()
+ * 	Uninstall the module
+ *
+ * Unregisters the misc device and notifier handler.  Actual device
+ * deinitialization is handled by ubi32_wdt_close().
+ */
+static int __devexit ubi32_wdt_remove(struct platform_device *pdev)
+{
+	misc_deregister(&ubi32_wdt_miscdev);
+	unregister_reboot_notifier(&ubi32_wdt_notifier);
+	return 0;
+}
+
+static struct platform_device *ubi32_wdt_device;
+
+static struct platform_driver ubi32_wdt_driver = {
+	.probe     = ubi32_wdt_probe,
+	.remove    = __devexit_p(ubi32_wdt_remove),
+	.suspend   = ubi32_wdt_suspend,
+	.resume    = ubi32_wdt_resume,
+	.driver    = {
+		.name  = WATCHDOG_NAME,
+		.owner = THIS_MODULE,
+	},
+};
+
+/*
+ * ubi32_wdt_init()
+ * 	Initialize the watchdog.
+ *
+ * Checks the module params and registers the platform device & driver.
+ * Real work is in the platform probe function.
+ */
+static int __init ubi32_wdt_init(void)
+{
+	unsigned long flags;
+	int ret;
+
+	/*
+	 * Check that the timeout value is within range
+	 */
+	spin_lock_irqsave(&ubi32_wdt_spinlock, flags);
+	ret = ubi32_wdt_set_timeout(timeout);
+	spin_unlock_irqrestore(&ubi32_wdt_spinlock, flags);
+	if (ret) {
+		return ret;
+	}
+
+	/*
+	 * Since this is an on-chip device and needs no board-specific
+	 * resources, we'll handle all the platform device stuff here.
+	 */
+	ret = platform_driver_register(&ubi32_wdt_driver);
+	if (ret) {
+		printk(KERN_ERR PFX "unable to register driver\n");
+		return ret;
+	}
+
+	ubi32_wdt_device = platform_device_register_simple(WATCHDOG_NAME, -1, NULL, 0);
+	if (IS_ERR(ubi32_wdt_device)) {
+		printk(KERN_ERR PFX "unable to register device\n");
+		platform_driver_unregister(&ubi32_wdt_driver);
+		return PTR_ERR(ubi32_wdt_device);
+	}
+
+	return 0;
+}
+
+/*
+ * ubi32_wdt_exit()
+ * 	Deinitialize module
+ *
+ * Back out the platform device & driver steps.  Real work is in the
+ * platform remove function.
+ */
+static void __exit ubi32_wdt_exit(void)
+{
+	platform_device_unregister(ubi32_wdt_device);
+	platform_driver_unregister(&ubi32_wdt_driver);
+}
+
+module_init(ubi32_wdt_init);
+module_exit(ubi32_wdt_exit);
+
+MODULE_AUTHOR("Sol Kavy<sol@ubicom.com>");
+MODULE_DESCRIPTION("Ubicom32 Watchdog Device Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
+
+module_param(timeout, uint, 0);
+MODULE_PARM_DESC(timeout,
+	"Watchdog timeout in seconds. (1<=timeout<=((2^32)/SCLK), default="
+		__MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout,
+	"Watchdog cannot be stopped once started (default="
+		__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");