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openwrt-xburst/target/linux/coldfire/patches/019-m5445x_spi.patch
kaloz 343c185b7d use broken-out patches for the coldfire to make it easier to follow differences against the bsp 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16547 3c298f89-4303-0410-b956-a3cf2f4a3e73
2009-06-23 21:04:37 +00:00

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84 KiB
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From bc755a3b8859e7307a8b10f39ca4cb6401c51987 Mon Sep 17 00:00:00 2001
From: Kurt Mahan <kmahan@freescale.com>
Date: Tue, 27 Nov 2007 14:39:37 -0700
Subject: [PATCH] Add M5445x SPI support.
LTIBName: m5445x-spi
Signed-off-by: Kurt Mahan <kmahan@freescale.com>
---
arch/m68k/configs/m54455evb_defconfig | 24 +-
drivers/spi/Kconfig | 36 +
drivers/spi/Makefile | 4 +
drivers/spi/coldfire_edma.c | 358 ++++++++
drivers/spi/spi-m5445x.c | 156 ++++
drivers/spi/spi_coldfire.c | 1552 +++++++++++++++++++++++++++++++++
drivers/spi/ssi_audio.c | 906 +++++++++++++++++++
include/asm-m68k/coldfire_edma.h | 101 ++-
include/linux/spi/mcfqspi.h | 80 ++
9 files changed, 3196 insertions(+), 21 deletions(-)
create mode 100644 drivers/spi/coldfire_edma.c
create mode 100644 drivers/spi/spi-m5445x.c
create mode 100644 drivers/spi/spi_coldfire.c
create mode 100644 drivers/spi/ssi_audio.c
create mode 100644 include/linux/spi/mcfqspi.h
--- a/arch/m68k/configs/m54455evb_defconfig
+++ b/arch/m68k/configs/m54455evb_defconfig
@@ -321,6 +321,8 @@ CONFIG_MTD_PHYSMAP_BANKWIDTH=1
#
# Self-contained MTD device drivers
#
+# CONFIG_MTD_DATAFLASH is not set
+# CONFIG_MTD_M25P80 is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_PHRAM is not set
# CONFIG_MTD_MTDRAM is not set
@@ -497,8 +499,26 @@ CONFIG_UNIX98_PTYS=y
#
# SPI support
#
-# CONFIG_SPI is not set
-# CONFIG_SPI_MASTER is not set
+CONFIG_SPI=y
+# CONFIG_SPI_DEBUG is not set
+CONFIG_COLDFIRE_EDMA=y
+CONFIG_SPI_MASTER=y
+
+#
+# SPI Master Controller Drivers
+#
+# CONFIG_SPI_BITBANG is not set
+CONFIG_SPI_COLDFIRE=y
+CONFIG_SPI_COLDFIRE_DSPI_EDMA=y
+
+#
+# SPI Protocol Masters
+#
+# CONFIG_SPI_AT25 is not set
+# CONFIG_SPI_SPIDEV is not set
+# CONFIG_SPI_TLE62X0 is not set
+CONFIG_SPI_COLDFIRE_SSI_AUDIO=y
+# CONFIG_SSIAUDIO_USE_EDMA is not set
# CONFIG_W1 is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -35,6 +35,15 @@ config SPI_DEBUG
Say "yes" to enable debug messaging (like dev_dbg and pr_debug),
sysfs, and debugfs support in SPI controller and protocol drivers.
+config COLDFIRE_EDMA
+ tristate "Coldfire eDMA"
+ depends on COLDFIRE && EXPERIMENTAL
+ help
+ Support for Coldfire eDMA controller. Required for example
+ by SSI audio device driver.
+
+
+
#
# MASTER side ... talking to discrete SPI slave chips including microcontrollers
#
@@ -113,6 +122,21 @@ config SPI_GPIO
If unsure, say N.
+config SPI_COLDFIRE
+ tristate "Coldfire QSPI/DSPI SPI Master"
+ depends on SPI_MASTER && COLDFIRE && EXPERIMENTAL
+ help
+ SPI driver for Freescale Coldfire QSPI module in master mode.
+ Tested with the 5282 processor, but should also work with other
+ Coldfire variants.
+
+config SPI_COLDFIRE_DSPI_EDMA
+ boolean "Coldfire DSPI master driver uses eDMA"
+ depends on SPI_MASTER && COLDFIRE && SPI_COLDFIRE && EXPERIMENTAL && COLDFIRE_EDMA
+ default n
+ help
+ Say "yes" if you want DSPI master driver to use eDMA for transfers.
+
config SPI_IMX
tristate "Freescale iMX SPI controller"
depends on SPI_MASTER && ARCH_IMX && EXPERIMENTAL
@@ -255,6 +279,18 @@ config SPI_TLE62X0
#
# Add new SPI protocol masters in alphabetical order above this line
#
+config SPI_COLDFIRE_SSI_AUDIO
+ tristate "Coldfire SSI AUDIO"
+ depends on SPI_MASTER && SPI_COLDFIRE && EXPERIMENTAL
+ help
+ SSI audio device driver
+
+config SSIAUDIO_USE_EDMA
+ boolean "Coldfire DSPI master driver uses eDMA"
+ default y
+ depends on EXPERIMENTAL && COLDFIRE_EDMA && SPI_COLDFIRE_SSI_AUDIO
+ help
+ Say "yes" if you want SSI audio driver to use eDMA for SSI transfers.
# (slave support would go here)
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -6,6 +6,8 @@ ifeq ($(CONFIG_SPI_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG
endif
+obj-$(CONFIG_COLDFIRE_EDMA) += coldfire_edma.o
+
# small core, mostly translating board-specific
# config declarations into driver model code
obj-$(CONFIG_SPI_MASTER) += spi.o
@@ -16,6 +18,7 @@ obj-$(CONFIG_SPI_BFIN) += spi_bfin5xx.
obj-$(CONFIG_SPI_BITBANG) += spi_bitbang.o
obj-$(CONFIG_SPI_AU1550) += au1550_spi.o
obj-$(CONFIG_SPI_BUTTERFLY) += spi_butterfly.o
+obj-$(CONFIG_SPI_COLDFIRE) += spi_coldfire.o spi-m5445x.o
obj-$(CONFIG_SPI_GPIO) += spi_gpio.o
obj-$(CONFIG_SPI_IMX) += spi_imx.o
obj-$(CONFIG_SPI_LM70_LLP) += spi_lm70llp.o
@@ -35,6 +38,7 @@ obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.
obj-$(CONFIG_SPI_AT25) += at25.o
obj-$(CONFIG_SPI_SPIDEV) += spidev.o
obj-$(CONFIG_SPI_TLE62X0) += tle62x0.o
+obj-$(CONFIG_SPI_COLDFIRE_SSI_AUDIO) += ssi_audio.o
# ... add above this line ...
# SPI slave controller drivers (upstream link)
--- /dev/null
+++ b/drivers/spi/coldfire_edma.c
@@ -0,0 +1,358 @@
+/*
+ *
+ * coldfire_edma.c - eDMA driver for Coldfire MCF5445x
+ *
+ * Yaroslav Vinogradov yaroslav.vinogradov@freescale.com
+ *
+ * Copyright Freescale Semiconductor, Inc. 2007
+ *
+ * This program 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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <asm/virtconvert.h>
+#include <asm/coldfire.h>
+#include <linux/fs.h>
+#include <linux/cdev.h>
+#include <linux/seq_file.h>
+#include <linux/proc_fs.h>
+#include <asm/mcf5445x_edma.h>
+#include <asm/mcf5445x_intc.h>
+#include <asm/coldfire_edma.h>
+
+
+/* callback handler data for each TCD */
+struct edma_isr_record {
+ edma_irq_handler irq_handler; /* interrupt handler */
+ edma_error_handler error_handler; /* error interrupt handler */
+ void* dev; /* device used for the channel */
+ int allocated; /* busy flag */
+ spinlock_t *lock; /* spin lock (if needs to be locked in interrupt) */
+ const char* device_id; /* device id string, used in proc file system */
+};
+
+/* device structure */
+struct coldfire_edma_dev {
+ struct cdev cdev; /* character device */
+ struct edma_isr_record dma_interrupt_handlers[EDMA_CHANNELS]; /* channel handlers */
+};
+
+/* allocated major device number */
+static int coldfire_dma_major;
+/* device driver structure */
+static struct coldfire_edma_dev* devp = NULL;
+
+/* device driver file operations */
+struct file_operations coldfire_edma_fops = {
+ .owner = THIS_MODULE,
+};
+
+/* eDMA channel interrupt handler */
+static int dmaisr(int irq, void *dev_id)
+{
+ int channel = irq - EDMA_INT_CONTROLLER_BASE - EDMA_INT_CHANNEL_BASE;
+ int result = IRQ_HANDLED;
+
+ if (devp!=NULL && devp->dma_interrupt_handlers[channel].lock) {
+ spin_lock(devp->dma_interrupt_handlers[channel].lock);
+ }
+
+ if (devp!=NULL && devp->dma_interrupt_handlers[channel].irq_handler) {
+ result = devp->dma_interrupt_handlers[channel].irq_handler(channel,
+ devp->dma_interrupt_handlers[channel].dev);
+ } else {
+ confirm_edma_interrupt_handled(channel);
+ printk(EDMA_DRIVER_NAME ": No handler for DMA channel %d\n", channel);
+ }
+
+ if (devp!=NULL && devp->dma_interrupt_handlers[channel].lock) {
+ spin_unlock(devp->dma_interrupt_handlers[channel].lock);
+ }
+
+ return result;
+}
+
+/* eDMA error interrupt handler */
+static int dma_error_isr(int irq, void* dev_id)
+{
+ u16 err;
+ int i;
+
+ err = MCF_EDMA_ERR;
+ for (i=0;i<EDMA_CHANNELS;i++) {
+ if (err & (1<<i)) {
+ if (devp!=NULL && devp->dma_interrupt_handlers[i].error_handler) {
+ devp->dma_interrupt_handlers[i].error_handler(i, devp->dma_interrupt_handlers[i].dev);
+ } else {
+ printk(KERN_WARNING EDMA_DRIVER_NAME ": DMA error on channel %d\n", i);
+ }
+ }
+ }
+
+ MCF_EDMA_CERR = MCF_EDMA_CERR_CAER;
+ return IRQ_HANDLED;
+}
+
+/* sets channel parameters */
+void set_edma_params(int channel, u32 source, u32 dest,
+ u32 attr, u32 soff, u32 nbytes, u32 slast,
+ u32 citer, u32 biter, u32 doff, u32 dlast_sga,
+ int major_int, int disable_req)
+{
+
+ if (channel<0 || channel>EDMA_CHANNELS)
+ return;
+
+ MCF_EDMA_TCD_SADDR(channel) = source;
+ MCF_EDMA_TCD_DADDR(channel) = dest;
+ MCF_EDMA_TCD_ATTR(channel) = attr;
+ MCF_EDMA_TCD_SOFF(channel) = MCF_EDMA_TCD_SOFF_SOFF(soff);
+ MCF_EDMA_TCD_NBYTES(channel) = MCF_EDMA_TCD_NBYTES_NBYTES(nbytes);
+ MCF_EDMA_TCD_SLAST(channel) = MCF_EDMA_TCD_SLAST_SLAST(slast);
+ MCF_EDMA_TCD_CITER(channel) = MCF_EDMA_TCD_CITER_CITER(citer);
+ MCF_EDMA_TCD_BITER(channel)=MCF_EDMA_TCD_BITER_BITER(biter);
+ MCF_EDMA_TCD_DOFF(channel) = MCF_EDMA_TCD_DOFF_DOFF(doff);
+ MCF_EDMA_TCD_DLAST_SGA(channel) = MCF_EDMA_TCD_DLAST_SGA_DLAST_SGA(dlast_sga);
+ /* interrupt at the end of major loop */
+ if (major_int) {
+ MCF_EDMA_TCD_CSR(channel) |= MCF_EDMA_TCD_CSR_INT_MAJOR;
+ } else {
+ MCF_EDMA_TCD_CSR(channel) &= ~MCF_EDMA_TCD_CSR_INT_MAJOR;
+ }
+ /* disable request at the end of major loop of transfer or not*/
+ if (disable_req) {
+ MCF_EDMA_TCD_CSR(channel) |= MCF_EDMA_TCD_CSR_D_REQ;
+ } else {
+ MCF_EDMA_TCD_CSR(channel) &= ~MCF_EDMA_TCD_CSR_D_REQ;
+ }
+
+}
+EXPORT_SYMBOL(set_edma_params);
+
+/* init eDMA controller */
+void init_edma(void)
+{
+ MCF_EDMA_CR = 0;
+}
+EXPORT_SYMBOL(init_edma);
+
+/* request eDMA channel */
+int request_edma_channel(int channel,
+ edma_irq_handler handler,
+ edma_error_handler error_handler,
+ void* dev,
+ spinlock_t *lock,
+ const char* device_id )
+{
+ if (devp!=NULL && channel>=0 && channel<=EDMA_CHANNELS) {
+ if (devp->dma_interrupt_handlers[channel].allocated) {
+ return -EBUSY;
+ }
+ devp->dma_interrupt_handlers[channel].allocated = 1;
+ devp->dma_interrupt_handlers[channel].irq_handler = handler;
+ devp->dma_interrupt_handlers[channel].error_handler = error_handler;
+ devp->dma_interrupt_handlers[channel].dev = dev;
+ devp->dma_interrupt_handlers[channel].lock = lock;
+ devp->dma_interrupt_handlers[channel].device_id = device_id;
+ return 0;
+ }
+ return -EINVAL;
+}
+EXPORT_SYMBOL(request_edma_channel);
+
+/* free eDMA channel */
+int free_edma_channel(int channel, void* dev)
+{
+ if (devp!=NULL && channel>=0 && channel<=EDMA_CHANNELS) {
+ if (devp->dma_interrupt_handlers[channel].allocated) {
+ if (devp->dma_interrupt_handlers[channel].dev != dev) {
+ return -EBUSY;
+ }
+ devp->dma_interrupt_handlers[channel].allocated = 0;
+ devp->dma_interrupt_handlers[channel].dev = NULL;
+ devp->dma_interrupt_handlers[channel].irq_handler = NULL;
+ devp->dma_interrupt_handlers[channel].error_handler = NULL;
+ devp->dma_interrupt_handlers[channel].lock = NULL;
+ }
+ return 0;
+ }
+ return -EINVAL;
+}
+EXPORT_SYMBOL(free_edma_channel);
+
+/* clean-up device driver allocated resources */
+static void coldfire_edma_cleanup(void)
+{
+ dev_t devno;
+ int i;
+
+ /* free interrupts/memory */
+ if (devp) {
+ for (i=0;i<EDMA_CHANNELS;i++)
+ {
+ MCF_INTC0_SIMR = EDMA_INT_CHANNEL_BASE+i;
+ free_irq(EDMA_INT_CHANNEL_BASE+EDMA_INT_CONTROLLER_BASE+i, devp);
+ }
+ MCF_INTC0_SIMR = EDMA_INT_CHANNEL_BASE+EDMA_CHANNELS;
+ free_irq(EDMA_INT_CHANNEL_BASE+EDMA_INT_CONTROLLER_BASE+EDMA_CHANNELS, devp);
+ cdev_del(&devp->cdev);
+ kfree(devp);
+ }
+
+ /* unregister character device */
+ devno = MKDEV(coldfire_dma_major, 0);
+ unregister_chrdev_region(devno, 1);
+}
+
+#ifdef CONFIG_PROC_FS
+/* proc file system support */
+
+#define FREE_CHANNEL "free"
+#define DEVICE_UNKNOWN "device unknown"
+
+static int proc_edma_show(struct seq_file *m, void *v)
+{
+ int i;
+
+ if (devp==NULL) return 0;
+
+ for (i = 0 ; i < EDMA_CHANNELS ; i++) {
+ if (devp->dma_interrupt_handlers[i].allocated) {
+ if (devp->dma_interrupt_handlers[i].device_id)
+ seq_printf(m, "%2d: %s\n", i, devp->dma_interrupt_handlers[i].device_id);
+ else
+ seq_printf(m, "%2d: %s\n", i, DEVICE_UNKNOWN);
+ } else {
+ seq_printf(m, "%2d: %s\n", i, FREE_CHANNEL);
+ }
+ }
+ return 0;
+}
+
+static int proc_edma_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, proc_edma_show, NULL);
+}
+
+static const struct file_operations proc_edma_operations = {
+ .open = proc_edma_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static int __init proc_edma_init(void)
+{
+ struct proc_dir_entry *e;
+
+ e = create_proc_entry("edma", 0, NULL);
+ if (e)
+ e->proc_fops = &proc_edma_operations;
+
+ return 0;
+}
+
+#endif
+
+/* initializes device driver */
+static int __init coldfire_edma_init(void)
+{
+ dev_t dev;
+ int result;
+ int i;
+
+ /* allocate free major number */
+ result = alloc_chrdev_region(&dev, DMA_DEV_MINOR, 1, EDMA_DRIVER_NAME);
+ if (result<0) {
+ printk(KERN_WARNING EDMA_DRIVER_NAME": can't get major %d\n", result);
+ return result;
+ }
+ coldfire_dma_major = MAJOR(dev);
+
+ /* allocate device driver structure */
+ devp = kmalloc(sizeof(struct coldfire_edma_dev), GFP_KERNEL);
+ if (!devp) {
+ result = -ENOMEM;
+ goto fail;
+ }
+
+ /* init handlers (no handlers for beggining) */
+ for (i=0;i<EDMA_CHANNELS;i++) {
+ devp->dma_interrupt_handlers[i].irq_handler = NULL;
+ devp->dma_interrupt_handlers[i].error_handler = NULL;
+ devp->dma_interrupt_handlers[i].dev = NULL;
+ devp->dma_interrupt_handlers[i].allocated = 0;
+ devp->dma_interrupt_handlers[i].lock = NULL;
+ devp->dma_interrupt_handlers[i].device_id = NULL;
+ }
+
+ /* register char device */
+ cdev_init(&devp->cdev, &coldfire_edma_fops);
+ devp->cdev.owner = THIS_MODULE;
+ devp->cdev.ops = &coldfire_edma_fops;
+ result = cdev_add(&devp->cdev, dev, 1);
+ if (result) {
+ printk(KERN_NOTICE EDMA_DRIVER_NAME": Error %d adding coldfire-dma device\n", result);
+ result = -ENODEV;
+ goto fail;
+ }
+
+ /* request/enable irq for each eDMA channel */
+ for (i=0;i<EDMA_CHANNELS;i++)
+ {
+ result = request_irq(EDMA_INT_CHANNEL_BASE+EDMA_INT_CONTROLLER_BASE+i,
+ dmaisr, SA_INTERRUPT, EDMA_DRIVER_NAME, devp);
+ if (result) {
+ printk(KERN_WARNING EDMA_DRIVER_NAME": Cannot request irq %d\n",
+ EDMA_INT_CHANNEL_BASE+EDMA_INT_CONTROLLER_BASE+i);
+ result = -EBUSY;
+ goto fail;
+ }
+
+ MCF_INTC0_ICR(EDMA_INT_CHANNEL_BASE+i) = EDMA_IRQ_LEVEL;
+ MCF_INTC0_CIMR = EDMA_INT_CHANNEL_BASE+i;
+
+ }
+
+ /* request error interrupt */
+ result = request_irq(EDMA_INT_CHANNEL_BASE + EDMA_INT_CONTROLLER_BASE + EDMA_CHANNELS,
+ dma_error_isr, SA_INTERRUPT, EDMA_DRIVER_NAME, devp);
+ if (result) {
+ printk(KERN_WARNING EDMA_DRIVER_NAME": Cannot request irq %d\n",
+ EDMA_INT_CHANNEL_BASE+EDMA_INT_CONTROLLER_BASE+EDMA_CHANNELS);
+ result = -EBUSY;
+ goto fail;
+ }
+
+ /* enable error interrupt in interrupt controller */
+ MCF_INTC0_ICR(EDMA_INT_CHANNEL_BASE+EDMA_CHANNELS) = EDMA_IRQ_LEVEL;
+ MCF_INTC0_CIMR = EDMA_INT_CHANNEL_BASE+EDMA_CHANNELS;
+
+#ifdef CONFIG_PROC_FS
+ proc_edma_init();
+#endif
+
+ printk(EDMA_DRIVER_NAME ": initialized successfully\n");
+
+ return 0;
+fail:
+ coldfire_edma_cleanup();
+ return result;
+
+}
+
+static void __exit coldfire_edma_exit(void)
+{
+ coldfire_edma_cleanup();
+}
+
+module_init(coldfire_edma_init);
+module_exit(coldfire_edma_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Yaroslav Vinogradov, Freescale Inc.");
+MODULE_DESCRIPTION("eDMA library for Coldfire 5445x");
--- /dev/null
+++ b/drivers/spi/spi-m5445x.c
@@ -0,0 +1,156 @@
+/***************************************************************************/
+/*
+ * linux/arch/m68k/coldfire/spi-m5445x.c
+ *
+ * Sub-architcture dependant initialization code for the Freescale
+ * 5445x SPI module
+ *
+ * Yaroslav Vinogradov yaroslav.vinogradov@freescale.com
+ * Copyright Freescale Semiconductor, Inc 2007
+ *
+ * This program 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.
+ */
+/***************************************************************************/
+
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/param.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+
+#include <asm/dma.h>
+#include <asm/traps.h>
+#include <asm/machdep.h>
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+#include <asm/mcfqspi.h>
+#include <asm/mcf5445x_gpio.h>
+
+#define SPI_NUM_CHIPSELECTS 0x10
+#define SPI_PAR_VAL (0 | MCF_GPIO_PAR_DSPI_PCS5_PCS5 | MCF_GPIO_PAR_DSPI_PCS2_PCS2 \
+ | MCF_GPIO_PAR_DSPI_PCS1_PCS1 | MCF_GPIO_PAR_DSPI_PCS0_PCS0 | MCF_GPIO_PAR_DSPI_SIN_SIN \
+ | MCF_GPIO_PAR_DSPI_SOUT_SOUT | MCF_GPIO_PAR_DSPI_SCK_SCK)
+
+#define MCF5445x_DSPI_IRQ_SOURCE (31)
+#define MCF5445x_DSPI_IRQ_VECTOR (64 + MCF5445x_DSPI_IRQ_SOURCE)
+
+#define MCF5445x_DSPI_PAR (0xFC0A4063)
+#define MCF5445x_DSPI_MCR (0xFC05C000)
+#define MCF5445x_INTC0_ICR (0xFC048040)
+#define MCF5445x_INTC0_IMRL (0xFC04800C)
+
+
+#define M5445x_AUDIO_IRQ_SOURCE 49
+#define M5445x_AUDIO_IRQ_VECTOR (128+M5445x_AUDIO_IRQ_SOURCE)
+#define M5445x_AUDIO_IRQ_LEVEL 4
+
+void coldfire_qspi_cs_control(u8 cs, u8 command)
+{
+}
+
+#if defined(CONFIG_SPI_COLDFIRE_SSI_AUDIO)
+static struct coldfire_spi_chip ssi_audio_chip_info = {
+ .mode = SPI_MODE_0,
+ .bits_per_word = 16,
+ .del_cs_to_clk = 16,
+ .del_after_trans = 16,
+ .void_write_data = 0
+};
+
+#endif
+
+static struct spi_board_info spi_board_info[] = {
+
+#if defined(CONFIG_SPI_COLDFIRE_SSI_AUDIO)
+ {
+ .modalias = "ssi_audio",
+ .max_speed_hz = 300000,
+ .bus_num = 1,
+ .chip_select = 5,
+ .irq = M5445x_AUDIO_IRQ_VECTOR,
+ .platform_data = NULL,
+ .controller_data = &ssi_audio_chip_info
+ }
+#endif
+
+};
+
+static struct coldfire_spi_master coldfire_master_info = {
+ .bus_num = 1,
+ .num_chipselect = SPI_NUM_CHIPSELECTS,
+ .irq_source = MCF5445x_DSPI_IRQ_SOURCE,
+ .irq_vector = MCF5445x_DSPI_IRQ_VECTOR,
+ .irq_mask = (0x01 << MCF5445x_DSPI_IRQ_SOURCE),
+ .irq_lp = 0x2, /* Level */
+ .par_val = SPI_PAR_VAL,
+// .par_val16 = SPI_PAR_VAL,
+ .cs_control = coldfire_qspi_cs_control,
+};
+
+static struct resource coldfire_spi_resources[] = {
+ [0] = {
+ .name = "qspi-par",
+ .start = MCF5445x_DSPI_PAR,
+ .end = MCF5445x_DSPI_PAR,
+ .flags = IORESOURCE_MEM
+ },
+
+ [1] = {
+ .name = "qspi-module",
+ .start = MCF5445x_DSPI_MCR,
+ .end = MCF5445x_DSPI_MCR + 0xB8,
+ .flags = IORESOURCE_MEM
+ },
+
+ [2] = {
+ .name = "qspi-int-level",
+ .start = MCF5445x_INTC0_ICR + MCF5445x_DSPI_IRQ_SOURCE,
+ .end = MCF5445x_INTC0_ICR + MCF5445x_DSPI_IRQ_SOURCE,
+ .flags = IORESOURCE_MEM
+ },
+
+ [3] = {
+ .name = "qspi-int-mask",
+ .start = MCF5445x_INTC0_IMRL,
+ .end = MCF5445x_INTC0_IMRL,
+ .flags = IORESOURCE_MEM
+ }
+};
+
+static struct platform_device coldfire_spi = {
+ .name = "spi_coldfire", //"coldfire-qspi",
+ .id = -1,
+ .resource = coldfire_spi_resources,
+ .num_resources = ARRAY_SIZE(coldfire_spi_resources),
+ .dev = {
+ .platform_data = &coldfire_master_info,
+ }
+};
+
+static int __init spi_dev_init(void)
+{
+ int retval = 0;
+
+ retval = platform_device_register(&coldfire_spi);
+
+ if (retval < 0) {
+ printk(KERN_ERR "SPI-m5445x: platform_device_register failed with code=%d\n", retval);
+ goto out;
+ }
+
+ if (ARRAY_SIZE(spi_board_info))
+ retval = spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
+
+
+out:
+ return retval;
+}
+
+arch_initcall(spi_dev_init);
--- /dev/null
+++ b/drivers/spi/spi_coldfire.c
@@ -0,0 +1,1552 @@
+/****************************************************************************/
+
+/*
+ * spi_coldfire.c - Master QSPI/DSPI controller for the ColdFire processors
+ *
+ * (C) Copyright 2005, Intec Automation,
+ * Mike Lavender (mike@steroidmicros)
+ *
+ * (C) Copyright 2007, Freescale Inc,
+ * Yaroslav Vinogradov (yaroslav.vinogradov@freescale.com)
+ *
+
+ This program 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 program 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 this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+/* ------------------------------------------------------------------------- */
+
+
+/****************************************************************************/
+
+/*
+ * Includes
+ */
+
+#include <linux/autoconf.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/spi/spi.h>
+#include <linux/workqueue.h>
+#include <linux/delay.h>
+
+#include <asm/delay.h>
+#include <asm/mcfsim.h>
+#include <asm/mcfqspi.h>
+#include <asm/coldfire.h>
+#include <asm/virtconvert.h>
+
+#if defined(CONFIG_M54455)
+ #define SPI_DSPI
+ #if defined(CONFIG_SPI_COLDFIRE_DSPI_EDMA)
+ #define SPI_DSPI_EDMA
+ #ifdef CONFIG_MMU
+ #define SPI_USE_MMU
+ #endif
+ #endif
+#endif
+
+#ifdef SPI_DSPI
+#include <asm/mcf5445x_dspi.h>
+
+
+#endif
+
+#if defined(SPI_DSPI_EDMA)
+
+/* edma buffer size in transfer units (32bits) */
+#define EDMA_BUFFER_SIZE (PAGE_SIZE/4)
+#define EDMA_BUFSIZE_KMALLOC (EDMA_BUFFER_SIZE*4)
+
+#define DSPI_DMA_RX_TCD 12
+#define DSPI_DMA_TX_TCD 13
+
+
+#include <asm/coldfire_edma.h>
+#include <asm/mcf5445x_edma.h>
+#endif
+
+
+MODULE_AUTHOR("Mike Lavender");
+MODULE_DESCRIPTION("ColdFire QSPI Contoller");
+MODULE_LICENSE("GPL");
+
+#define DRIVER_NAME "Coldfire QSPI/DSPI"
+
+/****************************************************************************/
+
+/*
+ * Local constants and macros
+ */
+
+#define QSPI_RAM_SIZE 0x10 /* 16 word table */
+
+#define QSPI_TRANSMIT_RAM 0x00
+#define QSPI_RECEIVE_RAM 0x10
+#define QSPI_COMMAND_RAM 0x20
+
+#define QSPI_COMMAND 0x7000 /* 15: X = Continuous CS
+ * 14: 1 = Get BITSE from QMR[BITS]
+ * 13: 1 = Get DT from QDLYR[DTL]
+ * 12: 1 = Get DSK from QDLYR[QCD]
+ * 8-11: XXXX = next 4 bytes for CS
+ * 0-7: 0000 0000 Reserved
+ */
+
+#define QIR_WCEF 0x0008 /* write collison */
+#define QIR_ABRT 0x0004 /* abort */
+#define QIR_SPIF 0x0001 /* finished */
+
+#define QIR_WCEFE 0x0800
+#define QIR_ABRTE 0x0400
+#define QIR_SPIFE 0x0100
+
+#define QIR_WCEFB 0x8000
+#define QIR_ABRTB 0x4000
+#define QIR_ABRTL 0x1000
+
+#define QMR_BITS 0x3C00
+#define QMR_BITS_8 0x2000
+
+#define QCR_CONT 0x8000
+
+#define QDLYR_SPE 0x8000
+
+#define QWR_ENDQP_MASK 0x0F00
+#define QWR_CSIV 0x1000 /* 1 = active low chip selects */
+
+
+#define START_STATE ((void*)0)
+#define RUNNING_STATE ((void*)1)
+#define DONE_STATE ((void*)2)
+#define ERROR_STATE ((void*)-1)
+
+#define QUEUE_RUNNING 0
+#define QUEUE_STOPPED 1
+
+/****************************************************************************/
+
+/*
+ * Local Data Structures
+ */
+
+struct transfer_state {
+ u32 index;
+ u32 len;
+ void *tx;
+ void *tx_end;
+ void *rx;
+ void *rx_end;
+ char flags;
+#define TRAN_STATE_RX_VOID 0x01
+#define TRAN_STATE_TX_VOID 0x02
+#define TRAN_STATE_WORD_ODD_NUM 0x04
+ u8 cs;
+ u16 void_write_data;
+ unsigned cs_change:1;
+};
+
+typedef struct {
+ unsigned master:1;
+ unsigned dohie:1;
+ unsigned bits:4;
+ unsigned cpol:1;
+ unsigned cpha:1;
+ unsigned baud:8;
+} QMR;
+
+typedef struct {
+ unsigned spe:1;
+ unsigned qcd:7;
+ unsigned dtl:8;
+} QDLYR;
+
+typedef struct {
+ unsigned halt:1;
+ unsigned wren:1;
+ unsigned wrto:1;
+ unsigned csiv:1;
+ unsigned endqp:4;
+ unsigned cptqp:4;
+ unsigned newqp:4;
+} QWR;
+
+
+typedef struct {
+ unsigned master:1;
+ unsigned cont_scke:1;
+ unsigned dconf:2;
+ unsigned frz:1;
+ unsigned mtfe:1;
+ unsigned pcsse:1;
+ unsigned rooe:1;
+ unsigned pcsis:8;
+ unsigned reserved15:1;
+ unsigned mdis:1;
+ unsigned dis_tx:1;
+ unsigned dis_rxf:1;
+ unsigned clr_tx:1;
+ unsigned clr_rxf:1;
+ unsigned smpl_pt:2;
+ unsigned reserved71:7;
+ unsigned halt:1;
+} DSPI_MCR;
+
+typedef struct {
+ unsigned dbr:1;
+ unsigned fmsz:4;
+ unsigned cpol:1;
+ unsigned cpha:1;
+ unsigned lsbfe:1;
+ unsigned pcssck:2;
+ unsigned pasc:2;
+ unsigned pdt:2;
+ unsigned pbr:2;
+ unsigned cssck:4;
+ unsigned asc:4;
+ unsigned dt:4;
+ unsigned br:4;
+} DSPI_CTAR;
+
+struct chip_data {
+#if defined(SPI_DSPI)
+ /* dspi data */
+ union {
+ u32 mcr_val;
+ DSPI_MCR mcr;
+ };
+ union {
+ u32 ctar_val;
+ DSPI_CTAR ctar;
+ };
+#else
+ union {
+ u16 qmr_val;
+ QMR qmr;
+ };
+ union {
+ u16 qdlyr_val;
+ QDLYR qdlyr;
+ };
+ union {
+ u16 qwr_val;
+ QWR qwr;
+ };
+#endif
+
+ u16 void_write_data;
+};
+
+
+struct driver_data {
+ /* Driver model hookup */
+ struct platform_device *pdev;
+
+ /* SPI framework hookup */
+ struct spi_master *master;
+
+ /* Driver message queue */
+ struct workqueue_struct *workqueue;
+ struct work_struct pump_messages;
+ spinlock_t lock;
+ struct list_head queue;
+ int busy;
+ int run;
+
+ /* Message Transfer pump */
+ struct tasklet_struct pump_transfers;
+
+ /* Current message transfer state info */
+ struct spi_message* cur_msg;
+ struct spi_transfer* cur_transfer;
+ struct chip_data *cur_chip;
+ size_t len;
+ void *tx;
+ void *tx_end;
+ void *rx;
+ void *rx_end;
+ char flags;
+#define TRAN_STATE_RX_VOID 0x01
+#define TRAN_STATE_TX_VOID 0x02
+#define TRAN_STATE_WORD_ODD_NUM 0x04
+ u8 cs;
+ u16 void_write_data;
+ unsigned cs_change:1;
+
+ u32 trans_cnt;
+ u32 wce_cnt;
+ u32 abrt_cnt;
+#if defined(SPI_DSPI)
+ u32 *mcr; /* DSPI MCR register */
+ u32 *ctar; /* DSPI CTAR register */
+ u32 *dspi_dtfr; /* DSPI DTFR register */
+ u32 *dspi_drfr; /* DSPI DRFR register */
+ u32 *dspi_rser; /* DSPI RSER register */
+ u32 *dspi_sr; /* DSPI status register */
+ u8 dspi_ctas; /* DSPI CTAS value*/
+
+#if defined(SPI_DSPI_EDMA)
+ void* edma_tx_buf;
+ void* edma_rx_buf;
+#endif
+
+
+#else
+ u16 *qmr; /* QSPI mode register */
+ u16 *qdlyr; /* QSPI delay register */
+ u16 *qwr; /* QSPI wrap register */
+ u16 *qir; /* QSPI interrupt register */
+ u16 *qar; /* QSPI address register */
+ u16 *qdr; /* QSPI data register */
+ u16 *qcr; /* QSPI command register */
+#endif
+ u8 *par; /* Pin assignment register */
+ u8 *int_icr; /* Interrupt level and priority register */
+ u32 *int_mr; /* Interrupt mask register */
+ void (*cs_control)(u8 cs, u8 command);
+};
+
+#define DSPI_CS(cs) ((1<<(cs))<<16)
+
+
+/****************************************************************************/
+
+/*
+ * SPI local functions
+ */
+
+//#define SPI_COLDFIRE_DEBUG
+
+static void *next_transfer(struct driver_data *drv_data)
+{
+ struct spi_message *msg = drv_data->cur_msg;
+ struct spi_transfer *trans = drv_data->cur_transfer;
+
+ /* Move to next transfer */
+ if (trans->transfer_list.next != &msg->transfers) {
+ drv_data->cur_transfer =
+ list_entry(trans->transfer_list.next,
+ struct spi_transfer,
+ transfer_list);
+ return RUNNING_STATE;
+ } else
+ return DONE_STATE;
+}
+
+
+#define DSPI_BITS MCF_DSPI_DCTAR_FMSZ(15)
+#define DSPI_BITS_16 MCF_DSPI_DCTAR_FMSZ(15)
+#define DSPI_BITS_8 MCF_DSPI_DCTAR_FMSZ(7)
+#define DSPI_FIFO_SIZE 16
+
+static inline int is_word_transfer(struct driver_data *drv_data)
+{
+#if defined(SPI_DSPI)
+ return ((*drv_data->ctar & DSPI_BITS_16) == DSPI_BITS_8) ? 0 : 1;
+#else
+ return ((*drv_data->qmr & QMR_BITS) == QMR_BITS_8) ? 0 : 1;
+#endif
+}
+
+static void inline set_8bit_transfer_mode(struct driver_data *drv_data)
+{
+#if defined(SPI_DSPI)
+ *drv_data->ctar |= (*drv_data->ctar & ~DSPI_BITS) | DSPI_BITS_8;
+#else
+ *drv_data->qmr |= (*drv_data->qmr & ~QMR_BITS) | QMR_BITS_8;
+#endif
+}
+
+static void inline set_16bit_transfer_mode(struct driver_data *drv_data)
+{
+#if defined(SPI_DSPI)
+ *drv_data->ctar |= (*drv_data->ctar & ~DSPI_BITS) | DSPI_BITS_16;
+#else
+ *drv_data->qmr |= (*drv_data->qmr & ~QMR_BITS);
+#endif
+}
+
+static int write(struct driver_data *drv_data)
+{
+ int tx_count = 0;
+#ifndef SPI_DSPI
+ int cmd_count = 0;
+#endif
+ int tx_word;
+
+#if defined(SPI_DSPI)
+
+#if defined(SPI_DSPI_EDMA)
+ u32* edma_wr;
+#endif
+
+ u16 d16;
+ u8 d8;
+ u32 dspi_pushr;
+ int first = 1;
+#endif
+
+ tx_word = is_word_transfer(drv_data);
+
+ // If we are in word mode, but only have a single byte to transfer
+ // then switch to byte mode temporarily. Will switch back at the
+ // end of the transfer.
+ if (tx_word && ((drv_data->tx_end - drv_data->tx) == 1)) {
+ drv_data->flags |= TRAN_STATE_WORD_ODD_NUM;
+ set_8bit_transfer_mode(drv_data);
+ tx_word = 0;
+ }
+
+
+#if defined(SPI_DSPI)
+
+#if defined(SPI_DSPI_EDMA)
+ edma_wr = (u32*)(drv_data->edma_tx_buf);
+#endif
+
+
+#if defined(SPI_DSPI_EDMA)
+ while ((drv_data->tx < drv_data->tx_end) && (tx_count < EDMA_BUFFER_SIZE)) {
+#else
+ while ((drv_data->tx < drv_data->tx_end) && (tx_count < DSPI_FIFO_SIZE)) {
+#endif
+ if (tx_word) {
+ if ((drv_data->tx_end - drv_data->tx) == 1)
+ break;
+ if (!(drv_data->flags & TRAN_STATE_TX_VOID)) {
+ d16 = *(u16 *)drv_data->tx;
+ } else {
+ d16 = drv_data->void_write_data;
+ }
+
+ dspi_pushr = MCF_DSPI_DTFR_TXDATA(d16)
+ | DSPI_CS(drv_data->cs)
+ | MCF_DSPI_DTFR_CTAS(drv_data->dspi_ctas)
+ //| MCF_DSPI_DTFR_CONT
+ ;
+
+ drv_data->tx += 2;
+
+#if defined(SPI_DSPI_EDMA)
+ if (drv_data->tx == drv_data->tx_end || tx_count==EDMA_BUFFER_SIZE-1) {
+#else
+ if (drv_data->tx == drv_data->tx_end || tx_count==DSPI_FIFO_SIZE-1) {
+#endif
+ // last transfer in queue
+ dspi_pushr |= MCF_DSPI_DTFR_EOQ;
+ if (drv_data->cs_change) {
+ dspi_pushr &= ~MCF_DSPI_DTFR_CONT;
+ }
+ }
+
+ if (first) {
+ first = 0;
+ dspi_pushr |= MCF_DSPI_DTFR_CTCNT; // clear counter
+ }
+#if defined(SPI_DSPI_EDMA)
+ *edma_wr = dspi_pushr;
+ edma_wr++;
+#else
+ *drv_data->dspi_dtfr = dspi_pushr;
+ //MCF_DSPI_DTFR = dspi_pushr;
+#endif
+
+
+ } else {
+ if (!(drv_data->flags & TRAN_STATE_TX_VOID)) {
+ d8 = *(u8 *)drv_data->tx;
+ } else {
+ d8 = *(u8 *)&drv_data->void_write_data;
+ }
+
+ dspi_pushr = MCF_DSPI_DTFR_TXDATA(d8)
+ | DSPI_CS(drv_data->cs)
+ /* | MCF_DSPI_DTFR_PCS5 | */
+ | MCF_DSPI_DTFR_CTAS(drv_data->dspi_ctas)
+ | MCF_DSPI_DTFR_CONT;
+
+ drv_data->tx++;
+
+ if (drv_data->tx == drv_data->tx_end || tx_count==DSPI_FIFO_SIZE-1) {
+ // last transfer in queue
+ dspi_pushr |= MCF_DSPI_DTFR_EOQ;
+ if (drv_data->cs_change) {
+ dspi_pushr &= ~MCF_DSPI_DTFR_CONT;
+ }
+ }
+
+ if (first) {
+ first = 0;
+ dspi_pushr |= MCF_DSPI_DTFR_CTCNT; // clear counter
+ }
+
+#if defined(SPI_DSPI_EDMA)
+ *edma_wr = dspi_pushr;
+ edma_wr++;
+#else
+ *drv_data->dspi_dtfr = dspi_pushr;
+ //MCF_DSPI_DTFR = dspi_pushr;
+#endif
+
+ }
+ tx_count++;
+ }
+
+#if defined(SPI_DSPI_EDMA)
+
+ if (tx_count>0) {
+
+ // TODO: initiate eDMA transfer
+ set_edma_params(DSPI_DMA_TX_TCD,
+#ifdef SPI_USE_MMU
+ virt_to_phys(drv_data->edma_tx_buf),
+#else
+ drv_data->edma_tx_buf,
+#endif
+ (u32)drv_data->dspi_dtfr,
+ MCF_EDMA_TCD_ATTR_SSIZE_32BIT | MCF_EDMA_TCD_ATTR_DSIZE_32BIT,
+ 4, // soff
+ 4, // nbytes
+ 0, // slast
+ tx_count, // citer
+ tx_count, // biter
+ 0, // doff
+ 0, // dlastsga
+ 0, // major_int
+ 1 // disable_req
+ );
+
+ set_edma_params(DSPI_DMA_RX_TCD,
+ (u32)drv_data->dspi_drfr,
+#ifdef SPI_USE_MMU
+ virt_to_phys(drv_data->edma_rx_buf),
+#else
+ drv_data->edma_rx_buf,
+#endif
+ MCF_EDMA_TCD_ATTR_SSIZE_32BIT | MCF_EDMA_TCD_ATTR_DSIZE_32BIT,
+ 0, // soff
+ 4, // nbytes
+ 0, // slast
+ tx_count, // citer
+ tx_count, // biter
+ 4, // doff
+ 0, // dlastsga
+ 0, // major_int
+ 1 // disable_req
+ );
+
+
+ start_edma_transfer(DSPI_DMA_TX_TCD); // transmit SPI data
+ start_edma_transfer(DSPI_DMA_RX_TCD); // receive SPI data
+ }
+#endif
+
+#else
+
+ *drv_data->qar = QSPI_TRANSMIT_RAM;
+ while ((drv_data->tx < drv_data->tx_end) && (tx_count < QSPI_RAM_SIZE)) {
+ if (tx_word) {
+ if ((drv_data->tx_end - drv_data->tx) == 1)
+ break;
+
+ if (!(drv_data->flags & TRAN_STATE_TX_VOID))
+ *drv_data->qdr = *(u16 *)drv_data->tx;
+ else
+ *drv_data->qdr = drv_data->void_write_data;
+ drv_data->tx += 2;
+ } else {
+ if (!(drv_data->flags & TRAN_STATE_TX_VOID))
+ *drv_data->qdr = *(u8 *)drv_data->tx;
+ else
+ *drv_data->qdr = *(u8 *)&drv_data->void_write_data;
+ drv_data->tx++;
+ }
+ tx_count++;
+ }
+
+
+ *drv_data->qar = QSPI_COMMAND_RAM;
+ while (cmd_count < tx_count) {
+ u16 qcr = QSPI_COMMAND
+ | QCR_CONT
+ | (~((0x01 << drv_data->cs) << 8) & 0x0F00);
+
+ if ( (cmd_count == tx_count - 1)
+ && (drv_data->tx == drv_data->tx_end)
+ && (drv_data->cs_change) ) {
+ qcr &= ~QCR_CONT;
+ }
+ *drv_data->qcr = qcr;
+ cmd_count++;
+ }
+
+ *drv_data->qwr = (*drv_data->qwr & ~QWR_ENDQP_MASK) | ((cmd_count - 1) << 8);
+
+ /* Fire it up! */
+ *drv_data->qdlyr |= QDLYR_SPE;
+#endif
+
+ return tx_count;
+}
+
+
+static int read(struct driver_data *drv_data)
+{
+ int rx_count = 0;
+ int rx_word;
+#if defined(SPI_DSPI_EDMA)
+ u32* rx_edma;
+#endif
+ u16 d;
+ rx_word = is_word_transfer(drv_data);
+
+#if defined(SPI_DSPI)
+
+#if defined(SPI_DSPI_EDMA)
+ rx_edma = (u32*) drv_data->edma_tx_buf;
+ while ((drv_data->rx < drv_data->rx_end) && (rx_count < EDMA_BUFFER_SIZE)) {
+#else
+ while ((drv_data->rx < drv_data->rx_end) && (rx_count < DSPI_FIFO_SIZE)) {
+#endif
+ if (rx_word) {
+ if ((drv_data->rx_end - drv_data->rx) == 1)
+ break;
+#if defined(SPI_DSPI_EDMA)
+ d = MCF_DSPI_DRFR_RXDATA(*rx_edma);
+ rx_edma++;
+#else
+ d = MCF_DSPI_DRFR_RXDATA(*drv_data->dspi_drfr);
+#endif
+
+ if (!(drv_data->flags & TRAN_STATE_RX_VOID))
+ *(u16 *)drv_data->rx = d;
+ drv_data->rx += 2;
+ } else {
+#if defined(SPI_DSPI_EDMA)
+ d = MCF_DSPI_DRFR_RXDATA(*rx_edma);
+ rx_edma++;
+#else
+ d = MCF_DSPI_DRFR_RXDATA(*drv_data->dspi_drfr);
+#endif
+ if (!(drv_data->flags & TRAN_STATE_RX_VOID))
+ *(u8 *)drv_data->rx = d;
+ drv_data->rx++;
+ }
+ rx_count++;
+ }
+
+
+#else
+
+ *drv_data->qar = QSPI_RECEIVE_RAM;
+ while ((drv_data->rx < drv_data->rx_end) && (rx_count < QSPI_RAM_SIZE)) {
+ if (rx_word) {
+ if ((drv_data->rx_end - drv_data->rx) == 1)
+ break;
+
+ if (!(drv_data->flags & TRAN_STATE_RX_VOID))
+ *(u16 *)drv_data->rx = *drv_data->qdr;
+ drv_data->rx += 2;
+ } else {
+ if (!(drv_data->flags & TRAN_STATE_RX_VOID))
+ *(u8 *)drv_data->rx = *drv_data->qdr;
+ drv_data->rx++;
+ }
+ rx_count++;
+ }
+#endif
+
+ return rx_count;
+}
+
+
+static inline void qspi_setup_chip(struct driver_data *drv_data)
+{
+ struct chip_data *chip = drv_data->cur_chip;
+
+#if defined(SPI_DSPI)
+
+ *drv_data->mcr = chip->mcr_val;
+
+ // TODO: remove later
+ chip->ctar_val = 0x78560118;
+
+ *drv_data->ctar = chip->ctar_val;
+ *drv_data->dspi_rser = 0
+ | MCF_DSPI_DRSER_EOQFE
+#if defined(SPI_DSPI_EDMA)
+ | MCF_DSPI_DRSER_TFFFE
+ | MCF_DSPI_DRSER_TFFFS
+#endif
+ ;
+
+
+#else
+ *drv_data->qmr = chip->qmr_val;
+ *drv_data->qdlyr = chip->qdlyr_val;
+ *drv_data->qwr = chip->qwr_val;
+
+ /*
+ * Enable all the interrupts and clear all the flags
+ */
+ *drv_data->qir = (QIR_SPIFE | QIR_ABRTE | QIR_WCEFE)
+ | (QIR_WCEFB | QIR_ABRTB | QIR_ABRTL)
+ | (QIR_SPIF | QIR_ABRT | QIR_WCEF);
+#endif
+}
+
+#if defined(SPI_DSPI_EDMA)
+static int edma_tx_handler(int channel, void* dev)
+{
+ if (channel == DSPI_DMA_TX_TCD) {
+ stop_edma_transfer(DSPI_DMA_TX_TCD);
+ }
+ return IRQ_HANDLED;
+}
+
+static int edma_rx_handler(int channel, void* dev)
+{
+ if (channel == DSPI_DMA_RX_TCD) {
+ stop_edma_transfer(DSPI_DMA_RX_TCD);
+ }
+
+ return IRQ_HANDLED;
+}
+#endif
+
+static irqreturn_t qspi_interrupt(int irq, void *dev_id)
+{
+ struct driver_data *drv_data = (struct driver_data *)dev_id;
+ struct spi_message *msg = drv_data->cur_msg;
+#if defined(SPI_DSPI)
+#if !defined(SPI_DSPI_EDMA)
+ u32 irq_status = *drv_data->dspi_sr;
+#endif
+#else
+ u16 irq_status = *drv_data->qir;
+#endif
+
+ /* Clear all flags immediately */
+#if defined(SPI_DSPI)
+ *drv_data->dspi_sr = MCF_DSPI_DSR_EOQF;
+#else
+ *drv_data->qir |= (QIR_SPIF | QIR_ABRT | QIR_WCEF);
+#endif
+
+ if (!drv_data->cur_msg || !drv_data->cur_msg->state) {
+#if !defined(SPI_DSPI_EDMA)
+ /* if eDMA is used it happens some time (at least once)*/
+ printk(KERN_ERR "coldfire-qspi: bad message or transfer "
+ "state in interrupt handler. IRQ status=%x\n", irq_status);
+#endif
+ return IRQ_NONE;
+ }
+
+#if !defined(SPI_DSPI)
+ if (irq_status & QIR_SPIF) {
+#endif
+ /*
+ * Read the data into the buffer and reload and start
+ * queue with new data if not finished. If finished
+ * then setup the next transfer
+ */
+ read(drv_data);
+
+ if (drv_data->rx == drv_data->rx_end) {
+ /*
+ * Finished now - fall through and schedule next
+ * transfer tasklet
+ */
+ if (drv_data->flags & TRAN_STATE_WORD_ODD_NUM) {
+ //*drv_data->qmr &= ~QMR_BITS;
+ set_16bit_transfer_mode(drv_data);
+ }
+
+ msg->state = next_transfer(drv_data);
+ msg->actual_length += drv_data->len;
+ } else {
+ /* not finished yet - keep going */
+ write(drv_data);
+ return IRQ_HANDLED;
+ }
+#if !defined(SPI_DSPI)
+ } else {
+ if (irq_status & QIR_WCEF)
+ drv_data->wce_cnt++;
+
+ if (irq_status & QIR_ABRT)
+ drv_data->abrt_cnt++;
+
+ msg->state = ERROR_STATE;
+ }
+#endif
+
+ tasklet_schedule(&drv_data->pump_transfers);
+
+ return IRQ_HANDLED;
+}
+
+/* caller already set message->status; dma and pio irqs are blocked */
+static void giveback(struct driver_data *drv_data)
+{
+ struct spi_transfer* last_transfer;
+ unsigned long flags;
+ struct spi_message *msg;
+
+ spin_lock_irqsave(&drv_data->lock, flags);
+ msg = drv_data->cur_msg;
+ drv_data->cur_msg = NULL;
+ drv_data->cur_transfer = NULL;
+ drv_data->cur_chip = NULL;
+ queue_work(drv_data->workqueue, &drv_data->pump_messages);
+ spin_unlock_irqrestore(&drv_data->lock, flags);
+
+ last_transfer = list_entry(msg->transfers.prev,
+ struct spi_transfer,
+ transfer_list);
+
+ if (!last_transfer->cs_change)
+ drv_data->cs_control(drv_data->cs, QSPI_CS_DROP);
+
+ msg->state = NULL;
+ if (msg->complete)
+ msg->complete(msg->context);
+}
+
+
+static void pump_transfers(unsigned long data)
+{
+ struct driver_data *drv_data = (struct driver_data *)data;
+ struct spi_message *message = NULL;
+ struct spi_transfer *transfer = NULL;
+ struct spi_transfer *previous = NULL;
+ struct chip_data *chip = NULL;
+ unsigned long flags;
+
+ /* Get current state information */
+ message = drv_data->cur_msg;
+ transfer = drv_data->cur_transfer;
+ chip = drv_data->cur_chip;
+
+ /* Handle for abort */
+ if (message->state == ERROR_STATE) {
+ message->status = -EIO;
+ giveback(drv_data);
+ return;
+ }
+
+ /* Handle end of message */
+ if (message->state == DONE_STATE) {
+ message->status = 0;
+ giveback(drv_data);
+ return;
+ }
+
+ if (message->state == START_STATE) {
+ qspi_setup_chip(drv_data);
+
+ if (drv_data->cs_control) {
+ //printk( "m s\n" );
+ drv_data->cs_control(message->spi->chip_select, QSPI_CS_ASSERT);
+ }
+ }
+
+ /* Delay if requested at end of transfer*/
+ if (message->state == RUNNING_STATE) {
+ previous = list_entry(transfer->transfer_list.prev,
+ struct spi_transfer,
+ transfer_list);
+
+ if (drv_data->cs_control && transfer->cs_change)
+ drv_data->cs_control(message->spi->chip_select, QSPI_CS_DROP);
+
+ if (previous->delay_usecs)
+ udelay(previous->delay_usecs);
+
+ if (drv_data->cs_control && transfer->cs_change)
+ drv_data->cs_control(message->spi->chip_select, QSPI_CS_ASSERT);
+ }
+
+ drv_data->flags = 0;
+ drv_data->tx = (void *)transfer->tx_buf;
+ drv_data->tx_end = drv_data->tx + transfer->len;
+ drv_data->rx = transfer->rx_buf;
+ drv_data->rx_end = drv_data->rx + transfer->len;
+ drv_data->len = transfer->len;
+ if (!drv_data->rx)
+ drv_data->flags |= TRAN_STATE_RX_VOID;
+ if (!drv_data->tx)
+ drv_data->flags |= TRAN_STATE_TX_VOID;
+ drv_data->cs = message->spi->chip_select;
+ drv_data->cs_change = transfer->cs_change;
+ drv_data->void_write_data = chip->void_write_data;
+
+ message->state = RUNNING_STATE;
+
+ /* Go baby, go */
+ local_irq_save(flags);
+ write(drv_data);
+ local_irq_restore(flags);
+}
+
+
+static void pump_messages(struct work_struct * work)
+{
+ struct driver_data *drv_data;
+ unsigned long flags;
+
+ drv_data = container_of(work, struct driver_data, pump_messages);
+
+ /* Lock queue and check for queue work */
+ spin_lock_irqsave(&drv_data->lock, flags);
+ if (list_empty(&drv_data->queue) || drv_data->run == QUEUE_STOPPED) {
+ drv_data->busy = 0;
+ spin_unlock_irqrestore(&drv_data->lock, flags);
+ return;
+ }
+
+ /* Make sure we are not already running a message */
+ if (drv_data->cur_msg) {
+ spin_unlock_irqrestore(&drv_data->lock, flags);
+ return;
+ }
+
+ /* Extract head of queue */
+ drv_data->cur_msg = list_entry(drv_data->queue.next,
+ struct spi_message, queue);
+ list_del_init(&drv_data->cur_msg->queue);
+
+ /* Initial message state*/
+ drv_data->cur_msg->state = START_STATE;
+ drv_data->cur_transfer = list_entry(drv_data->cur_msg->transfers.next,
+ struct spi_transfer,
+ transfer_list);
+
+ /* Setup the SPI Registers using the per chip configuration */
+ drv_data->cur_chip = spi_get_ctldata(drv_data->cur_msg->spi);
+
+ /* Mark as busy and launch transfers */
+ tasklet_schedule(&drv_data->pump_transfers);
+
+ drv_data->busy = 1;
+ spin_unlock_irqrestore(&drv_data->lock, flags);
+}
+
+/****************************************************************************/
+
+/*
+ * SPI master implementation
+ */
+
+static int transfer(struct spi_device *spi, struct spi_message *msg)
+{
+ struct driver_data *drv_data = spi_master_get_devdata(spi->master);
+ unsigned long flags;
+
+ spin_lock_irqsave(&drv_data->lock, flags);
+
+ if (drv_data->run == QUEUE_STOPPED) {
+ spin_unlock_irqrestore(&drv_data->lock, flags);
+ return -ESHUTDOWN;
+ }
+
+ msg->actual_length = 0;
+ msg->status = -EINPROGRESS;
+ msg->state = START_STATE;
+
+ list_add_tail(&msg->queue, &drv_data->queue);
+
+ if (drv_data->run == QUEUE_RUNNING && !drv_data->busy)
+ queue_work(drv_data->workqueue, &drv_data->pump_messages);
+
+ spin_unlock_irqrestore(&drv_data->lock, flags);
+
+ return 0;
+}
+
+
+static int setup(struct spi_device *spi)
+{
+ struct coldfire_spi_chip *chip_info;
+ struct chip_data *chip;
+#ifndef SPI_DSPI
+ u32 baud_divisor = 255;
+#endif
+
+ chip_info = (struct coldfire_spi_chip *)spi->controller_data;
+
+ /* Only alloc on first setup */
+ chip = spi_get_ctldata(spi);
+ if (chip == NULL) {
+ chip = kcalloc(1, sizeof(struct chip_data), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+ spi->mode = chip_info->mode;
+ spi->bits_per_word = chip_info->bits_per_word;
+ }
+
+#if defined(SPI_DSPI)
+ chip->mcr.master = 1;
+ chip->mcr.cont_scke = 0;
+ chip->mcr.dconf = 0;
+ chip->mcr.frz = 0;
+ chip->mcr.mtfe = 1;
+ chip->mcr.pcsse = 0;
+ chip->mcr.rooe = 0;
+ chip->mcr.pcsis = 0xFF;
+ chip->mcr.reserved15 = 0;
+ chip->mcr.mdis = 0;
+ chip->mcr.dis_tx = 0;
+ chip->mcr.dis_rxf = 0;
+ chip->mcr.clr_tx = 1;
+ chip->mcr.clr_rxf = 1;
+ chip->mcr.smpl_pt = 0;
+ chip->mcr.reserved71 = 0;
+ chip->mcr.halt = 0;
+
+ if ((spi->bits_per_word >= 4) && (spi->bits_per_word <= 16)) {
+ chip->ctar.fmsz = spi->bits_per_word-1;
+ } else {
+ printk(KERN_ERR "coldfire-qspi: invalid wordsize\n");
+ kfree(chip);
+ return -ENODEV;
+ }
+
+ if (spi->mode & SPI_CPHA)
+ chip->ctar.cpha = 1;
+ else
+ chip->ctar.cpha = 0;
+
+ if (spi->mode & SPI_CPOL)
+ chip->ctar.cpol = 1;
+ else
+ chip->ctar.cpol = 0;
+
+ if (spi->mode & SPI_LSB_FIRST)
+ chip->ctar.lsbfe = 1;
+ else
+ chip->ctar.lsbfe = 0;
+
+ /* This values are default for audio device */
+ chip->ctar.dbr = 0;
+ chip->ctar.pbr = 2;
+ chip->ctar.br = 8;
+
+ /* This values are default for audio device */
+ chip->ctar.pcssck = 1;
+ chip->ctar.pasc = 1;
+ chip->ctar.pdt = 1;
+ chip->ctar.cssck = 0;
+ chip->ctar.asc = 1;
+ chip->ctar.dt = 1;
+
+ chip->void_write_data = chip_info->void_write_data;
+
+#else
+
+ chip->qwr.csiv = 1; // Chip selects are active low
+ chip->qmr.master = 1; // Must set to master mode
+ chip->qmr.dohie = 1; // Data output high impediance enabled
+ chip->void_write_data = chip_info->void_write_data;
+
+ chip->qdlyr.qcd = chip_info->del_cs_to_clk;
+ chip->qdlyr.dtl = chip_info->del_after_trans;
+
+ if (spi->max_speed_hz != 0)
+ baud_divisor = (MCF_CLK/(2*spi->max_speed_hz));
+
+ if (baud_divisor < 2)
+ baud_divisor = 2;
+
+ if (baud_divisor > 255)
+ baud_divisor = 255;
+
+ chip->qmr.baud = baud_divisor;
+
+ //printk( "QSPI: spi->max_speed_hz %d\n", spi->max_speed_hz );
+ //printk( "QSPI: Baud set to %d\n", chip->qmr.baud );
+
+ if (spi->mode & SPI_CPHA)
+ chip->qmr.cpha = 1;
+
+ if (spi->mode & SPI_CPOL)
+ chip->qmr.cpol = 1;
+
+ if (spi->bits_per_word == 16) {
+ chip->qmr.bits = 0;
+ } else if ((spi->bits_per_word >= 8) && (spi->bits_per_word <= 15)) {
+ chip->qmr.bits = spi->bits_per_word;
+ } else {
+ printk(KERN_ERR "coldfire-qspi: invalid wordsize\n");
+ kfree(chip);
+ return -ENODEV;
+ }
+
+#endif
+
+ spi_set_ctldata(spi, chip);
+
+ return 0;
+}
+
+static int init_queue(struct driver_data *drv_data)
+{
+ INIT_LIST_HEAD(&drv_data->queue);
+ spin_lock_init(&drv_data->lock);
+
+ drv_data->run = QUEUE_STOPPED;
+ drv_data->busy = 0;
+
+ tasklet_init(&drv_data->pump_transfers,
+ pump_transfers, (unsigned long)drv_data);
+
+ INIT_WORK(&drv_data->pump_messages, pump_messages/*, drv_data*/);
+
+ drv_data->workqueue = create_singlethread_workqueue(
+ drv_data->master->cdev.dev->bus_id);
+ if (drv_data->workqueue == NULL)
+ return -EBUSY;
+
+ return 0;
+}
+
+static int start_queue(struct driver_data *drv_data)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&drv_data->lock, flags);
+
+ if (drv_data->run == QUEUE_RUNNING || drv_data->busy) {
+ spin_unlock_irqrestore(&drv_data->lock, flags);
+ return -EBUSY;
+ }
+
+ drv_data->run = QUEUE_RUNNING;
+ drv_data->cur_msg = NULL;
+ drv_data->cur_transfer = NULL;
+ drv_data->cur_chip = NULL;
+ spin_unlock_irqrestore(&drv_data->lock, flags);
+
+ queue_work(drv_data->workqueue, &drv_data->pump_messages);
+
+ return 0;
+}
+
+static int stop_queue(struct driver_data *drv_data)
+{
+ unsigned long flags;
+ unsigned limit = 500;
+ int status = 0;
+
+ spin_lock_irqsave(&drv_data->lock, flags);
+
+ /* This is a bit lame, but is optimized for the common execution path.
+ * A wait_queue on the drv_data->busy could be used, but then the common
+ * execution path (pump_messages) would be required to call wake_up or
+ * friends on every SPI message. Do this instead */
+ drv_data->run = QUEUE_STOPPED;
+ while (!list_empty(&drv_data->queue) && drv_data->busy && limit--) {
+ spin_unlock_irqrestore(&drv_data->lock, flags);
+ msleep(10);
+ spin_lock_irqsave(&drv_data->lock, flags);
+ }
+
+ if (!list_empty(&drv_data->queue) || drv_data->busy)
+ status = -EBUSY;
+
+ spin_unlock_irqrestore(&drv_data->lock, flags);
+
+ return status;
+}
+
+static int destroy_queue(struct driver_data *drv_data)
+{
+ int status;
+
+ status = stop_queue(drv_data);
+ if (status != 0)
+ return status;
+
+ destroy_workqueue(drv_data->workqueue);
+
+ return 0;
+}
+
+
+static void cleanup(const struct spi_device *spi)
+{
+ struct chip_data *chip = spi_get_ctldata((struct spi_device *)spi);
+
+ dev_dbg(&spi->dev, "spi_device %u.%u cleanup\n",
+ spi->master->bus_num, spi->chip_select);
+
+ kfree(chip);
+}
+
+
+/****************************************************************************/
+
+/*
+ * Generic Device driver routines and interface implementation
+ */
+
+static int coldfire_spi_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct coldfire_spi_master *platform_info;
+ struct spi_master *master;
+ struct driver_data *drv_data = 0;
+ struct resource *memory_resource;
+ int irq;
+ int status = 0;
+ int i;
+
+#if defined(SPI_DSPI_EDMA)
+ init_edma();
+#endif
+
+ platform_info = (struct coldfire_spi_master *)pdev->dev.platform_data;
+
+ master = spi_alloc_master(dev, sizeof(struct driver_data));
+ if (!master)
+ return -ENOMEM;
+
+ drv_data = class_get_devdata(&master->cdev);
+ drv_data->master = master;
+
+ INIT_LIST_HEAD(&drv_data->queue);
+ spin_lock_init(&drv_data->lock);
+
+ master->bus_num = platform_info->bus_num;
+ master->num_chipselect = platform_info->num_chipselect;
+ master->cleanup = cleanup;
+ master->setup = setup;
+ master->transfer = transfer;
+
+ drv_data->cs_control = platform_info->cs_control;
+ if (drv_data->cs_control)
+ for(i = 0; i < master->num_chipselect; i++)
+ drv_data->cs_control(i, QSPI_CS_INIT | QSPI_CS_DROP);
+
+ /* Setup register addresses */
+ memory_resource = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qspi-module");
+ if (!memory_resource) {
+ dev_dbg(dev, "can not find platform module memory\n");
+ goto out_error_master_alloc;
+ }
+
+#if defined(SPI_DSPI_EDMA)
+ drv_data->edma_tx_buf = kmalloc(EDMA_BUFSIZE_KMALLOC, GFP_DMA);
+ if (!drv_data->edma_tx_buf) {
+ dev_dbg(dev, "cannot allocate eDMA TX memory\n");
+ goto out_error_master_alloc;
+ }
+ drv_data->edma_rx_buf = kmalloc(EDMA_BUFSIZE_KMALLOC, GFP_DMA);
+ if (!drv_data->edma_rx_buf) {
+ kfree(drv_data->edma_tx_buf);
+ dev_dbg(dev, "cannot allocate eDMA RX memory\n");
+ goto out_error_master_alloc;
+ }
+#endif
+
+#if defined(SPI_DSPI)
+
+ drv_data->mcr = (void *)(memory_resource->start + 0x00000000);
+ drv_data->ctar = (void *)(memory_resource->start + 0x0000000C);
+ drv_data->dspi_sr = (void *)(memory_resource->start + 0x0000002C);
+ drv_data->dspi_rser = (void *)(memory_resource->start + 0x00000030);
+ drv_data->dspi_dtfr = (void *)(memory_resource->start + 0x00000034);
+ drv_data->dspi_drfr = (void *)(memory_resource->start + 0x00000038);
+
+#else
+
+ drv_data->qmr = (void *)(memory_resource->start + 0x00000000);
+ drv_data->qdlyr = (void *)(memory_resource->start + 0x00000004);
+ drv_data->qwr = (void *)(memory_resource->start + 0x00000008);
+ drv_data->qir = (void *)(memory_resource->start + 0x0000000c);
+ drv_data->qar = (void *)(memory_resource->start + 0x00000010);
+ drv_data->qdr = (void *)(memory_resource->start + 0x00000014);
+ drv_data->qcr = (void *)(memory_resource->start + 0x00000014);
+
+#endif
+
+ /* Setup register addresses */
+ memory_resource = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qspi-par");
+ if (!memory_resource) {
+ dev_dbg(dev, "can not find platform par memory\n");
+ goto out_error_master_alloc;
+ }
+
+ drv_data->par = (void *)memory_resource->start;
+
+ /* Setup register addresses */
+ memory_resource = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qspi-int-level");
+ if (!memory_resource) {
+ dev_dbg(dev, "can not find platform par memory\n");
+ goto out_error_master_alloc;
+ }
+
+ drv_data->int_icr = (void *)memory_resource->start;
+
+ /* Setup register addresses */
+ memory_resource = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qspi-int-mask");
+ if (!memory_resource) {
+ dev_dbg(dev, "can not find platform par memory\n");
+ goto out_error_master_alloc;
+ }
+
+ drv_data->int_mr = (void *)memory_resource->start;
+
+ irq = platform_info->irq_vector;
+
+ status = request_irq(platform_info->irq_vector, qspi_interrupt, SA_INTERRUPT, dev->bus_id, drv_data);
+ if (status < 0) {
+ dev_err(&pdev->dev, "unable to attach ColdFire QSPI interrupt\n");
+ goto out_error_master_alloc;
+ }
+
+ /* Now that we have all the addresses etc. Let's set it up */
+ // TODO:
+ //*drv_data->par = platform_info->par_val;
+
+ MCF_GPIO_PAR_DSPI = 0
+ | MCF_GPIO_PAR_DSPI_PCS5_PCS5
+ | MCF_GPIO_PAR_DSPI_PCS2_PCS2
+ | MCF_GPIO_PAR_DSPI_PCS1_PCS1
+ | MCF_GPIO_PAR_DSPI_PCS0_PCS0
+ | MCF_GPIO_PAR_DSPI_SIN_SIN
+ | MCF_GPIO_PAR_DSPI_SOUT_SOUT
+ | MCF_GPIO_PAR_DSPI_SCK_SCK;
+
+ *drv_data->int_icr = platform_info->irq_lp;
+ *drv_data->int_mr &= ~platform_info->irq_mask;
+
+#ifdef SPI_DSPI
+ drv_data->dspi_ctas = 0; // TODO: change later
+#endif
+
+ /* Initial and start queue */
+ status = init_queue(drv_data);
+ if (status != 0) {
+ dev_err(&pdev->dev, "problem initializing queue\n");
+ goto out_error_irq_alloc;
+ }
+ status = start_queue(drv_data);
+ if (status != 0) {
+ dev_err(&pdev->dev, "problem starting queue\n");
+ goto out_error_irq_alloc;
+ }
+
+ /* Register with the SPI framework */
+ platform_set_drvdata(pdev, drv_data);
+ status = spi_register_master(master);
+ if (status != 0) {
+ dev_err(&pdev->dev, "problem registering spi master\n");
+ status = -EINVAL;
+ goto out_error_queue_alloc;
+ }
+
+#if defined(SPI_DSPI_EDMA)
+ if (request_edma_channel(DSPI_DMA_TX_TCD,
+ edma_tx_handler,
+ NULL,
+ pdev,
+ NULL, /* spinlock */
+ DRIVER_NAME
+ )!=0)
+ {
+ dev_err(&pdev->dev, "problem requesting edma transmit channel\n");
+ status = -EINVAL;
+ goto out_error_queue_alloc;
+ }
+
+ if (request_edma_channel(DSPI_DMA_RX_TCD,
+ edma_rx_handler,
+ NULL,
+ pdev,
+ NULL, /* spinlock */
+ DRIVER_NAME
+ )!=0)
+ {
+ dev_err(&pdev->dev, "problem requesting edma receive channel\n");
+ status = -EINVAL;
+ goto out_edma_transmit;
+ }
+#endif
+
+ printk( "SPI: Coldfire master initialized\n" );
+ //dev_info(&pdev->dev, "driver initialized\n");
+ return status;
+
+#if defined(SPI_DSPI_EDMA)
+out_edma_transmit:
+ free_edma_channel(DSPI_DMA_TX_TCD, pdev);
+#endif
+
+out_error_queue_alloc:
+ destroy_queue(drv_data);
+
+out_error_irq_alloc:
+ free_irq(irq, drv_data);
+
+out_error_master_alloc:
+ spi_master_put(master);
+ return status;
+
+}
+
+static int coldfire_spi_remove(struct platform_device *pdev)
+{
+ struct driver_data *drv_data = platform_get_drvdata(pdev);
+ int irq;
+ int status = 0;
+
+ if (!drv_data)
+ return 0;
+
+#if defined(SPI_DSPI_EDMA)
+ free_edma_channel(DSPI_DMA_TX_TCD, pdev);
+ free_edma_channel(DSPI_DMA_RX_TCD, pdev);
+#endif
+
+ /* Remove the queue */
+ status = destroy_queue(drv_data);
+ if (status != 0)
+ return status;
+
+ /* Disable the SSP at the peripheral and SOC level */
+ /*write_SSCR0(0, drv_data->ioaddr);
+ pxa_set_cken(drv_data->master_info->clock_enable, 0);*/
+
+ /* Release DMA */
+ /*if (drv_data->master_info->enable_dma) {
+ if (drv_data->ioaddr == SSP1_VIRT) {
+ DRCMRRXSSDR = 0;
+ DRCMRTXSSDR = 0;
+ } else if (drv_data->ioaddr == SSP2_VIRT) {
+ DRCMRRXSS2DR = 0;
+ DRCMRTXSS2DR = 0;
+ } else if (drv_data->ioaddr == SSP3_VIRT) {
+ DRCMRRXSS3DR = 0;
+ DRCMRTXSS3DR = 0;
+ }
+ pxa_free_dma(drv_data->tx_channel);
+ pxa_free_dma(drv_data->rx_channel);
+ }*/
+
+ /* Release IRQ */
+ irq = platform_get_irq(pdev, 0);
+ if (irq >= 0)
+ free_irq(irq, drv_data);
+
+ /* Disconnect from the SPI framework */
+ spi_unregister_master(drv_data->master);
+
+ /* Prevent double remove */
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static void coldfire_spi_shutdown(struct platform_device *pdev)
+{
+ int status = 0;
+
+ if ((status = coldfire_spi_remove(pdev)) != 0)
+ dev_err(&pdev->dev, "shutdown failed with %d\n", status);
+}
+
+
+#ifdef CONFIG_PM
+static int suspend_devices(struct device *dev, void *pm_message)
+{
+ pm_message_t *state = pm_message;
+
+ if (dev->power.power_state.event != state->event) {
+ dev_warn(dev, "pm state does not match request\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int coldfire_spi_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct driver_data *drv_data = platform_get_drvdata(pdev);
+ int status = 0;
+
+ /* Check all childern for current power state */
+ if (device_for_each_child(&pdev->dev, &state, suspend_devices) != 0) {
+ dev_warn(&pdev->dev, "suspend aborted\n");
+ return -1;
+ }
+
+ status = stop_queue(drv_data);
+ if (status != 0)
+ return status;
+ /*write_SSCR0(0, drv_data->ioaddr);
+ pxa_set_cken(drv_data->master_info->clock_enable, 0);*/
+
+ return 0;
+}
+
+static int coldfire_spi_resume(struct platform_device *pdev)
+{
+ struct driver_data *drv_data = platform_get_drvdata(pdev);
+ int status = 0;
+
+ /* Enable the SSP clock */
+ /*pxa_set_cken(drv_data->master_info->clock_enable, 1);*/
+
+ /* Start the queue running */
+ status = start_queue(drv_data);
+ if (status != 0) {
+ dev_err(&pdev->dev, "problem starting queue (%d)\n", status);
+ return status;
+ }
+
+ return 0;
+}
+#else
+#define coldfire_spi_suspend NULL
+#define coldfire_spi_resume NULL
+#endif /* CONFIG_PM */
+
+static struct platform_driver driver = {
+ .driver = {
+ .name = "spi_coldfire",
+ .bus = &platform_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = coldfire_spi_probe,
+ .remove = __devexit_p(coldfire_spi_remove),
+ .shutdown = coldfire_spi_shutdown,
+ .suspend = coldfire_spi_suspend,
+ .resume = coldfire_spi_resume,
+};
+
+static int __init coldfire_spi_init(void)
+{
+ platform_driver_register(&driver);
+
+ return 0;
+}
+module_init(coldfire_spi_init);
+
+static void __exit coldfire_spi_exit(void)
+{
+ platform_driver_unregister(&driver);
+}
+module_exit(coldfire_spi_exit);
--- /dev/null
+++ b/drivers/spi/ssi_audio.c
@@ -0,0 +1,906 @@
+/*
+ * MCF5445x audio driver.
+ *
+ * Yaroslav Vinogradov yaroslav.vinogradov@freescale.com
+ * Copyright Freescale Semiconductor, Inc. 2006
+ *
+ * This program 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.
+ */
+
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <asm/mcfsim.h>
+#include <linux/interrupt.h>
+#include <linux/soundcard.h>
+#include <asm/uaccess.h>
+#include <asm/virtconvert.h>
+
+#include <asm/coldfire.h>
+#include <asm/coldfire_edma.h>
+#include <asm/mcf5445x_ssi.h>
+#include <asm/mcf5445x_ccm.h>
+#include <asm/mcf5445x_gpio.h>
+
+#define SOUND_DEVICE_NAME "sound"
+#define DRIVER_NAME "ssi_audio"
+
+
+/* #define AUDIO_DEBUG */
+
+#ifdef CONFIG_MMU
+#define USE_MMU
+#endif
+
+#define MAX_SPEED_HZ 12000000
+
+#define M5445x_AUDIO_IRQ_SOURCE 49
+#define M5445x_AUDIO_IRQ_VECTOR (128+M5445x_AUDIO_IRQ_SOURCE)
+#define M5445x_AUDIO_IRQ_LEVEL 5
+
+/* TLV320DAC23 audio chip registers */
+
+#define CODEC_LEFT_IN_REG (0x00)
+#define CODEC_RIGHT_IN_REG (0x01)
+#define CODEC_LEFT_HP_VOL_REG (0x02)
+#define CODEC_RIGHT_HP_VOL_REG (0x03)
+#define CODEC_ANALOG_APATH_REG (0x04)
+#define CODEC_DIGITAL_APATH_REG (0x05)
+#define CODEC_POWER_DOWN_REG (0x06)
+#define CODEC_DIGITAL_IF_FMT_REG (0x07)
+#define CODEC_SAMPLE_RATE_REG (0x08)
+#define CODEC_DIGITAL_IF_ACT_REG (0x09)
+#define CODEC_RESET_REG (0x0f)
+
+#define CODEC_SAMPLE_8KHZ (0x0C)
+#define CODEC_SAMPLE_16KHZ (0x58)
+#define CODEC_SAMPLE_22KHZ (0x62)
+#define CODEC_SAMPLE_32KHZ (0x18)
+#define CODEC_SAMPLE_44KHZ (0x22)
+#define CODEC_SAMPLE_48KHZ (0x00)
+
+/* Audio buffer data size */
+#define BUFSIZE (64*1024)
+/* DMA transfer size */
+#define DMASIZE (16*1024)
+
+/* transmit eDMA channel for SSI channel 0 */
+#define DMA_TCD 10
+/* transmit eDMA channel for SSI channel 1 */
+#define DMA_TCD2 11
+
+struct ssi_audio {
+ struct spi_device *spi;
+ u32 speed;
+ u32 stereo;
+ u32 bits;
+ u32 format;
+ u8 isopen;
+ u8 dmaing;
+ u8 ssi_enabled;
+ u8 channel;
+ spinlock_t lock;
+ u8* audio_buf;
+};
+
+static struct ssi_audio* audio_device = NULL;
+volatile u32 audio_start;
+volatile u32 audio_count;
+volatile u32 audio_append;
+volatile u32 audio_appstart;
+volatile u32 audio_txbusy;
+
+struct ssi_audio_format {
+ unsigned int format;
+ unsigned int bits;
+} ssi_audio_formattable[] = {
+ { AFMT_MU_LAW, 8 },
+ { AFMT_A_LAW, 8 },
+ { AFMT_IMA_ADPCM, 8 },
+ { AFMT_U8, 8 },
+ { AFMT_S16_LE, 16 },
+ { AFMT_S16_BE, 16 },
+ { AFMT_S8, 8 },
+ { AFMT_U16_LE, 16 },
+ { AFMT_U16_BE, 16 },
+};
+
+#define FORMATSIZE (sizeof(ssi_audio_formattable) / sizeof(struct ssi_audio_format))
+
+static void ssi_audio_setsamplesize(int val)
+{
+ int i;
+
+ if (audio_device == NULL) return;
+
+ for (i = 0; (i < FORMATSIZE); i++) {
+ if (ssi_audio_formattable[i].format == val) {
+ audio_device->format = ssi_audio_formattable[i].format;
+ audio_device->bits = ssi_audio_formattable[i].bits;
+ break;
+ }
+ }
+
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":ssi_audio_setsamplesize %d %d\n", audio_device->format, audio_device->bits);
+#endif
+}
+
+static void ssi_audio_txdrain(void)
+{
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":ssi_audio_txdrain()\n");
+#endif
+
+ if (audio_device == NULL) return;
+
+ while (!signal_pending(current)) {
+ if (audio_txbusy == 0)
+ break;
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(1);
+ }
+}
+
+#ifdef CONFIG_SSIAUDIO_USE_EDMA
+/*
+ * Configure and start DMA engine.
+ */
+void __inline__ ssi_audio_dmarun(void)
+{
+ set_edma_params(DMA_TCD,
+#ifdef USE_MMU
+ virt_to_phys(&(audio_device->audio_buf[audio_start])),
+#else
+ (u32)&(audio_device->audio_buf[audio_start]),
+#endif
+ (u32)&MCF_SSI_TX0,
+ MCF_EDMA_TCD_ATTR_SSIZE_32BIT | MCF_EDMA_TCD_ATTR_DSIZE_32BIT,
+ 8,
+ 4,
+ 0,
+ audio_count/8,
+ audio_count/8,
+ 0,
+ 0,
+ 0, // major_int
+ 0 // disable_req
+ );
+
+ set_edma_params(DMA_TCD2,
+#ifdef USE_MMU
+ virt_to_phys(&(audio_device->audio_buf[audio_start+4])),
+#else
+ (u32)&(audio_device->audio_buf[audio_start+4]),
+#endif
+ (u32)&MCF_SSI_TX1,
+ MCF_EDMA_TCD_ATTR_SSIZE_32BIT | MCF_EDMA_TCD_ATTR_DSIZE_32BIT,
+ 8,
+ 4,
+ 0,
+ audio_count/8,
+ audio_count/8,
+ 0,
+ 0,
+ 1, // major_int
+ 0 // disable_req
+ );
+
+ audio_device->dmaing = 1;
+ audio_txbusy = 1;
+
+ start_edma_transfer(DMA_TCD);
+ start_edma_transfer(DMA_TCD2);
+#if 0
+ MCF_EDMA_ERQ |= (1<<DMA_TCD) | (1<<DMA_TCD2);
+ MCF_EDMA_SSRT = DMA_TCD;
+ MCF_EDMA_SSRT = DMA_TCD2;
+#endif
+
+}
+
+/*
+ * Start DMA'ing a new buffer of data if any available.
+ */
+static void ssi_audio_dmabuf(void)
+{
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":ssi_audio_dmabuf(): append=%x start=%x\n", audio_append, audio_appstart);
+#endif
+
+ /* If already running then nothing to do... */
+ if (audio_device->dmaing)
+ return;
+
+ /* Set DMA buffer size */
+ audio_count = (audio_append >= audio_appstart) ?
+ (audio_append - audio_appstart) :
+ (BUFSIZE - audio_appstart);
+ if (audio_count > DMASIZE)
+ audio_count = DMASIZE;
+
+ /* Adjust pointers and counters accordingly */
+ audio_appstart += audio_count;
+ if (audio_appstart >= BUFSIZE)
+ audio_appstart = 0;
+
+ if (audio_count > 0)
+ ssi_audio_dmarun();
+ else {
+ audio_txbusy = 0;
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":DMA buffer is empty!\n");
+#endif
+ }
+}
+
+void __inline__ stop_dma(void) {
+ stop_edma_transfer(DMA_TCD);
+ stop_edma_transfer(DMA_TCD2);
+}
+
+static int ssi_audio_dma_handler_empty(int channel, void *dev_id)
+{
+ return IRQ_HANDLED;
+}
+
+static int ssi_audio_dma_handler(int channel, void *dev_id)
+{
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":ssi_audio_dma_handler(channel=%d)\n", channel);
+#endif
+
+ /* Clear DMA interrupt */
+ stop_dma();
+
+ audio_device->dmaing = 0;
+
+ /* Update data pointers and counts */
+ audio_start += audio_count;
+ if (audio_start >= BUFSIZE)
+ audio_start = 0;
+ audio_count = 0;
+
+ /* Start new DMA buffer if we can */
+ ssi_audio_dmabuf();
+
+ return IRQ_HANDLED;
+}
+
+static void init_dma(void)
+{
+ /* SSI DMA Signals mapped to DMA request */
+ MCF_CCM_MISCCR &= ~MCF_CCM_MISCCR_TIMDMA;
+ init_edma();
+}
+
+#endif /* CONFIG_SSIAUDIO_USE_EDMA */
+
+
+/* Write CODEC register using SPI
+ * address - CODEC register address
+ * data - data to be written into register
+ */
+static int codec_write(u8 addr, u16 data)
+{
+ u16 spi_word;
+
+ if (audio_device==NULL || audio_device->spi==NULL)
+ return -ENODEV;
+
+ spi_word = ((addr & 0x7F)<<9)|(data & 0x1FF);
+ return spi_write(audio_device->spi, (const u8*)&spi_word, sizeof(spi_word));
+}
+
+static inline void enable_ssi(void)
+{
+ if (audio_device==NULL || audio_device->ssi_enabled) return;
+ audio_device->ssi_enabled = 1;
+ MCF_SSI_CR |= MCF_SSI_CR_SSI_EN; /* enable SSI module */
+ MCF_SSI_CR |= MCF_SSI_CR_TE; /* enable tranmitter */
+}
+
+static inline void disable_ssi(void)
+{
+ if (audio_device==NULL || audio_device->ssi_enabled==0) return;
+ MCF_SSI_CR &= ~MCF_SSI_CR_TE; /* disable transmitter */
+ MCF_SSI_CR &= ~MCF_SSI_CR_SSI_EN; /* disable SSI module */
+ audio_device->ssi_enabled = 0;
+}
+
+/* Audio CODEC initialization */
+/* TODO: also the SSI frequency/dividers must be adjusted */
+static void adjust_codec_speed(void) {
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":adjust_codec_speed: %d\n", audio_device->speed);
+#endif
+
+ if (audio_device->speed == 8000) {
+ codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_8KHZ);
+ } else if (audio_device->speed == 16000) {
+ codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_16KHZ);
+ } else if (audio_device->speed == 22000) {
+ codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_22KHZ);
+ } else if (audio_device->speed == 44000 || audio_device->speed == 44100) {
+ codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_44KHZ);
+ } else if (audio_device->speed == 48000) {
+ codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_48KHZ);
+ } else {
+ /* default 44KHz */
+ codec_write(CODEC_SAMPLE_RATE_REG,CODEC_SAMPLE_44KHZ);
+ }
+}
+
+static void codec_reset(void)
+{
+ codec_write(CODEC_RESET_REG, 0); /* reset the audio chip */
+ udelay(1500); /* wait for reset */
+}
+
+static void init_audio_codec(void)
+{
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":init_audio_codec()\n");
+#endif
+ codec_reset();
+
+ codec_write(CODEC_LEFT_IN_REG, 0x017);
+ codec_write(CODEC_RIGHT_IN_REG, 0x017);
+ codec_write(CODEC_POWER_DOWN_REG, 0x000); /* Turn off line input */
+ codec_write(CODEC_DIGITAL_IF_FMT_REG, 0x00A); /* I2S slave mode */
+ /* codec_write(CODEC_DIGITAL_IF_FMT_REG, 0x042); // I2S master mode */
+ codec_write(CODEC_DIGITAL_APATH_REG, 0x007); /* Set A path */
+
+ /* set sample rate */
+ adjust_codec_speed();
+
+ codec_write(CODEC_LEFT_HP_VOL_REG, 0x075); /* set volume */
+ codec_write(CODEC_RIGHT_HP_VOL_REG, 0x075); /* set volume */
+ codec_write(CODEC_DIGITAL_IF_ACT_REG, 1); /* Activate digital interface */
+ codec_write(CODEC_ANALOG_APATH_REG, 0x0F2);
+}
+
+
+static void chip_init(void)
+{
+#ifdef CONFIG_SSIAUDIO_USE_EDMA
+ init_dma();
+#endif
+
+ /* Enable the SSI pins */
+ MCF_GPIO_PAR_SSI = ( 0
+ | MCF_GPIO_PAR_SSI_MCLK
+ | MCF_GPIO_PAR_SSI_STXD(3)
+ | MCF_GPIO_PAR_SSI_SRXD(3)
+ | MCF_GPIO_PAR_SSI_FS(3)
+ | MCF_GPIO_PAR_SSI_BCLK(3) );
+
+}
+
+static void init_ssi(void)
+{
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":init_ssi()\n");
+#endif
+
+ /* Dividers are for MCF54445 on 266Mhz, the output is 44.1Khz*/
+ /* Enable SSI clock in CCM */
+ MCF_CCM_CDR = MCF_CCM_CDR_SSIDIV(47);
+
+ /* Issue a SSI reset */
+ MCF_SSI_CR &= ~MCF_SSI_CR_SSI_EN; /* disable SSI module */
+
+ /* SSI module uses internal CPU clock */
+ MCF_CCM_MISCCR |= MCF_CCM_MISCCR_SSISRC;
+
+ MCF_CCM_MISCCR |= MCF_CCM_MISCCR_SSIPUE;
+ MCF_CCM_MISCCR |= MCF_CCM_MISCCR_SSIPUS_UP;
+
+ MCF_SSI_CR = 0
+ | MCF_SSI_CR_CIS
+ | MCF_SSI_CR_TCH /* Enable two channel mode */
+ | MCF_SSI_CR_MCE /* Set clock out on SSI_MCLK pin */
+ | MCF_SSI_CR_I2S_MASTER /* Set I2S master mode */
+ | MCF_SSI_CR_SYN /* Enable synchronous mode */
+ | MCF_SSI_CR_NET
+ ;
+
+ MCF_SSI_TCR = 0
+ | MCF_SSI_TCR_TXDIR /* internally generated bit clock */
+ | MCF_SSI_TCR_TFDIR /* internally generated frame sync */
+ | MCF_SSI_TCR_TSCKP /* Clock data on falling edge of bit clock */
+ | MCF_SSI_TCR_TFSI /* Frame sync active low */
+ | MCF_SSI_TCR_TEFS /* TX frame sync 1 bit before data */
+ | MCF_SSI_TCR_TFEN0 /* TX FIFO 0 enabled */
+ | MCF_SSI_TCR_TFEN1 /* TX FIFO 1 enabled */
+ | MCF_SSI_TCR_TXBIT0
+ ;
+
+ MCF_SSI_CCR = MCF_SSI_CCR_WL(7) /* 16 bit word length */
+ | MCF_SSI_CCR_DC(1) /* Frame rate divider */
+ | MCF_SSI_CCR_PM(0)
+ | MCF_SSI_CCR_DIV2
+ ;
+
+ MCF_SSI_FCSR = 0
+ | MCF_SSI_FCSR_TFWM0(0)
+ | MCF_SSI_FCSR_TFWM1(0)
+ ;
+
+ MCF_SSI_IER = 0 // interrupts
+#ifndef CONFIG_SSIAUDIO_USE_EDMA
+ | MCF_SSI_IER_TIE /* transmit interrupts */
+ | MCF_SSI_IER_TFE0 /* transmit FIFO 0 empty */
+ | MCF_SSI_IER_TFE1 /* transmit FIFO 1 empty */
+#else
+ | MCF_SSI_IER_TDMAE /* DMA request enabled */
+ | MCF_SSI_IER_TFE0 /* transmit FIFO 0 empty */
+ | MCF_SSI_IER_TFE1 /* transmit FIFO 1 empty */
+#endif
+ ;
+
+#ifndef CONFIG_SSIAUDIO_USE_EDMA
+ /* enable IRQ: SSI interrupt */
+ MCF_INTC1_ICR(M5445x_AUDIO_IRQ_SOURCE) = M5445x_AUDIO_IRQ_LEVEL;
+ MCF_INTC1_CIMR = M5445x_AUDIO_IRQ_SOURCE;
+#endif
+}
+
+#ifndef CONFIG_SSIAUDIO_USE_EDMA
+/* interrupt for SSI */
+static int ssi_audio_isr(int irq, void *dev_id)
+{
+ unsigned long *bp;
+
+ if (audio_txbusy==0) {
+ return IRQ_HANDLED;
+ }
+
+ spin_lock(&(audio_device->lock));
+
+ if (audio_start == audio_append) {
+ disable_ssi();
+ audio_txbusy = 0;
+ } else {
+ if (MCF_SSI_ISR & (MCF_SSI_ISR_TFE0|MCF_SSI_ISR_TFE1)) {
+ bp = (unsigned long *) &audio_device->audio_buf[audio_start];
+ if (audio_device->channel) {
+ MCF_SSI_TX1 = *bp;
+ audio_device->channel = 0;
+ } else {
+ MCF_SSI_TX0 = *bp;
+ audio_device->channel = 1;
+ }
+ audio_start += 4;
+ if (audio_start >= BUFSIZE)
+ audio_start = 0;
+ }
+ }
+
+ spin_unlock(&(audio_device->lock));
+
+ return IRQ_HANDLED;
+}
+#endif
+
+/* Set initial driver playback defaults. */
+static void init_driver_variables(void)
+{
+ audio_device->speed = 44100;
+ audio_device->format = AFMT_S16_LE;
+ audio_device->bits = 16;
+ audio_device->stereo = 1;
+ audio_device->ssi_enabled = 0;
+
+ audio_start = 0;
+ audio_count = 0;
+ audio_append = 0;
+ audio_appstart = 0;
+ audio_txbusy = 0;
+ audio_device->dmaing = 0;
+}
+
+/* open audio device */
+static int ssi_audio_open(struct inode *inode, struct file *filp)
+{
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":ssi_audio_open()\n");
+#endif
+
+ if (audio_device==NULL) return (-ENODEV);
+
+ if (audio_device->isopen)
+ return(-EBUSY);
+
+ spin_lock(&(audio_device->lock));
+
+ audio_device->isopen = 1;
+
+ init_driver_variables();
+ init_ssi();
+ init_audio_codec();
+
+ spin_unlock(&(audio_device->lock));
+
+ udelay(100);
+
+ return 0;
+}
+
+/* close audio device */
+static int ssi_audio_close(struct inode *inode, struct file *filp)
+{
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":ssi_audio_close()\n");
+#endif
+
+ if (audio_device==NULL) return (-ENODEV);
+
+ ssi_audio_txdrain();
+
+ spin_lock(&(audio_device->lock));
+
+#ifdef CONFIG_SSIAUDIO_USE_EDMA
+ stop_dma();
+#endif
+ disable_ssi();
+ codec_reset();
+ init_driver_variables();
+ audio_device->isopen = 0;
+
+ spin_unlock(&(audio_device->lock));
+ return 0;
+}
+
+/* write to audio device */
+static ssize_t ssi_audio_write(struct file *filp, const char *buf, size_t count, loff_t *ppos)
+{
+ unsigned long *dp, *buflp;
+ unsigned short *bufwp;
+ unsigned char *bufbp;
+ unsigned int slen, bufcnt, i, s, e;
+
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":ssi_audio_write(buf=%x,count=%d)\n", (int) buf, count);
+#endif
+
+ if (audio_device==NULL) return (-ENODEV);
+
+ if (count <= 0)
+ return 0;
+
+ spin_lock(&(audio_device->lock));
+
+ buflp = (unsigned long *) buf;
+ bufwp = (unsigned short *) buf;
+ bufbp = (unsigned char *) buf;
+
+ bufcnt = count & ~0x3;
+
+ bufcnt <<= 1;
+ if (audio_device->stereo == 0)
+ bufcnt <<= 1;
+ if (audio_device->bits == 8)
+ bufcnt <<= 1;
+
+tryagain:
+ /*
+ * Get a snapshot of buffer, so we can figure out how
+ * much data we can fit in...
+ */
+ s = audio_start;
+ e = audio_append;
+ dp = (unsigned long *) &(audio_device->audio_buf[e]);
+
+ slen = ((s > e) ? (s - e) : (BUFSIZE - (e - s))) - 4;
+ if (slen > bufcnt)
+ slen = bufcnt;
+ if ((BUFSIZE - e) < slen)
+ slen = BUFSIZE - e;
+
+ if (slen == 0) {
+ if (signal_pending(current))
+ return(-ERESTARTSYS);
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(1);
+ goto tryagain;
+ }
+
+ /* For DMA we need to have data as 32 bit
+ values (since SSI TX register is 32 bit).
+ So, the incomming 16 bit data must be put to buffer as 32 bit values.
+ Also, the endianess is converted if needed
+ */
+ if (audio_device->stereo) {
+ if (audio_device->bits == 16) {
+ if (audio_device->format==AFMT_S16_LE) {
+ /*- convert endianess, probably could be done by SSI also */
+ for (i = 0; (i < slen); i += 4) {
+ unsigned short val = le16_to_cpu((*bufwp++));
+ *dp++ = val;
+ }
+ } else {
+ for (i = 0; (i < slen); i += 4) {
+ *dp++ = *bufwp++;
+ }
+ }
+ } else {
+ for (i = 0; (i < slen); i += 4) {
+ *dp = (((unsigned long) *bufbp++) << 24);
+ *dp++ |= (((unsigned long) *bufbp++) << 8);
+ }
+ }
+ } else {
+ if (audio_device->bits == 16) {
+ for (i = 0; (i < slen); i += 4) {
+ *dp++ = (((unsigned long)*bufwp)<<16) | *bufwp;
+ bufwp++;
+ }
+ } else {
+ for (i = 0; (i < slen); i += 4) {
+ *dp++ = (((unsigned long) *bufbp) << 24) |
+ (((unsigned long) *bufbp) << 8);
+ bufbp++;
+ }
+ }
+ }
+
+ e += slen;
+ if (e >= BUFSIZE)
+ e = 0;
+ audio_append = e;
+
+ /* If not outputing audio, then start now */
+ if (audio_txbusy == 0) {
+ audio_txbusy++;
+ audio_device->channel = 0;
+ enable_ssi();
+#ifdef CONFIG_SSIAUDIO_USE_EDMA
+ ssi_audio_dmabuf(); /* start first DMA transfer */
+#endif
+ }
+
+ bufcnt -= slen;
+
+ if (bufcnt > 0)
+ goto tryagain;
+
+ spin_unlock(&(audio_device->lock));
+
+ return count;
+}
+
+/* ioctl: control the driver */
+static int ssi_audio_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ long val;
+ int rc = 0;
+
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":ssi_audio_ioctl(cmd=%x,arg=%x)\n", (int) cmd, (int) arg);
+#endif
+
+ if (audio_device==NULL) return (-ENODEV);
+
+ switch (cmd) {
+
+ case SNDCTL_DSP_SPEED:
+ if (access_ok(VERIFY_READ, (void *) arg, sizeof(val))) {
+ get_user(val, (unsigned long *) arg);
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME ":ssi_audio_ioctl: SNDCTL_DSP_SPEED: %ld\n", val);
+#endif
+ ssi_audio_txdrain();
+ audio_device->speed = val;
+ init_audio_codec();
+ } else {
+ rc = -EINVAL;
+ }
+ break;
+
+ case SNDCTL_DSP_SAMPLESIZE:
+ if (access_ok(VERIFY_READ, (void *) arg, sizeof(val))) {
+ get_user(val, (unsigned long *) arg);
+ ssi_audio_txdrain();
+ ssi_audio_setsamplesize(val);
+ } else {
+ rc = -EINVAL;
+ }
+ break;
+
+ case SNDCTL_DSP_STEREO:
+ if (access_ok(VERIFY_READ, (void *) arg, sizeof(val))) {
+ get_user(val, (unsigned long *) arg);
+ ssi_audio_txdrain();
+ audio_device->stereo = val;
+ } else {
+ rc = -EINVAL;
+ }
+ break;
+
+ case SNDCTL_DSP_GETBLKSIZE:
+ if (access_ok(VERIFY_WRITE, (void *) arg, sizeof(long)))
+ put_user(BUFSIZE, (long *) arg);
+ else
+ rc = -EINVAL;
+ break;
+
+ case SNDCTL_DSP_SYNC:
+ ssi_audio_txdrain();
+ break;
+
+ default:
+ rc = -EINVAL;
+ break;
+ }
+
+ return rc;
+}
+
+/****************************************************************************/
+
+struct file_operations ssi_audio_fops = {
+ open: ssi_audio_open, /* open */
+ release: ssi_audio_close, /* close */
+ write: ssi_audio_write, /* write */
+ ioctl: ssi_audio_ioctl, /* ioctl */
+};
+
+/* initialize audio driver */
+static int __devinit ssi_audio_probe(struct spi_device *spi)
+{
+ struct ssi_audio *audio;
+ int err;
+
+#ifdef AUDIO_DEBUG
+ printk(DRIVER_NAME": probe\n");
+#endif
+
+ if (!spi->irq) {
+ dev_dbg(&spi->dev, "no IRQ?\n");
+ return -ENODEV;
+ }
+
+ /* don't exceed max specified sample rate */
+ if (spi->max_speed_hz > MAX_SPEED_HZ) {
+ dev_dbg(&spi->dev, "f(sample) %d KHz?\n",
+ (spi->max_speed_hz)/1000);
+ return -EINVAL;
+ }
+
+ /* register charcter device */
+ if (register_chrdev(SOUND_MAJOR, SOUND_DEVICE_NAME, &ssi_audio_fops) < 0) {
+ printk(KERN_WARNING DRIVER_NAME ": failed to register major %d\n", SOUND_MAJOR);
+ dev_dbg(&spi->dev, DRIVER_NAME ": failed to register major %d\n", SOUND_MAJOR);
+ return -ENODEV;
+ }
+
+ audio = kzalloc(sizeof(struct ssi_audio), GFP_KERNEL);
+ if (!audio) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+
+ /* DMA buffer must be from GFP_DMA zone, so it will not be cached */
+ audio->audio_buf = kmalloc(BUFSIZE, GFP_DMA);
+ if (audio->audio_buf == NULL) {
+ dev_dbg(&spi->dev, DRIVER_NAME ": failed to allocate DMA[%d] buffer\n", BUFSIZE);
+ err = -ENOMEM;
+ goto err_free_mem;
+ }
+
+ audio_device = audio;
+
+ dev_set_drvdata(&spi->dev, audio);
+ spi->dev.power.power_state = PMSG_ON;
+
+ audio->spi = spi;
+
+#ifndef CONFIG_SSIAUDIO_USE_EDMA
+ if (request_irq(spi->irq, ssi_audio_isr, SA_INTERRUPT, spi->dev.bus_id, audio)) {
+ dev_dbg(&spi->dev, "irq %d busy?\n", spi->irq);
+ err = -EBUSY;
+ goto err_free_mem;
+ }
+
+#else
+ /* request 2 eDMA channels since two channel output mode is used */
+ if (request_edma_channel(DMA_TCD,
+ ssi_audio_dma_handler_empty,
+ NULL,
+ audio,
+ &(audio_device->lock),
+ DRIVER_NAME
+ )!=0)
+ {
+ dev_dbg(&spi->dev, "DMA channel %d busy?\n", DMA_TCD);
+ err = -EBUSY;
+ goto err_free_mem;
+ }
+ if (request_edma_channel(DMA_TCD2,
+ ssi_audio_dma_handler,
+ NULL,
+ audio,
+ &(audio_device->lock),
+ DRIVER_NAME
+ )!=0)
+ {
+ dev_dbg(&spi->dev, "DMA channel %d busy?\n", DMA_TCD2);
+ err = -EBUSY;
+ goto err_free_mem;
+ }
+
+#endif
+ chip_init();
+ printk(DRIVER_NAME ": Probed successfully\n");
+
+ return 0;
+
+ err_free_mem:
+ kfree(audio);
+ audio_device = NULL;
+ err_out:
+ unregister_chrdev(SOUND_MAJOR, SOUND_DEVICE_NAME);
+ return err;
+}
+
+static int __devexit ssi_audio_remove(struct spi_device *spi)
+{
+ struct ssi_audio *audio = dev_get_drvdata(&spi->dev);
+
+ ssi_audio_txdrain();
+#ifndef CONFIG_SSIAUDIO_USE_EDMA
+ free_irq(spi->irq, audio);
+#else
+ free_edma_channel(DMA_TCD, audio);
+ free_edma_channel(DMA_TCD2, audio);
+#endif
+ kfree(audio->audio_buf);
+ kfree(audio);
+ audio_device = NULL;
+ unregister_chrdev(SOUND_MAJOR, SOUND_DEVICE_NAME);
+ dev_dbg(&spi->dev, "unregistered audio\n");
+ return 0;
+}
+
+static int ssi_audio_suspend(struct spi_device *spi, pm_message_t message) {
+ return 0;
+}
+
+static int ssi_audio_resume(struct spi_device *spi) {
+ return 0;
+}
+
+static struct spi_driver ssi_audio_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+ .probe = ssi_audio_probe,
+ .remove = __devexit_p(ssi_audio_remove),
+ .suspend = ssi_audio_suspend,
+ .resume = ssi_audio_resume,
+};
+
+static int __init ssi_audio_init(void)
+{
+ return spi_register_driver(&ssi_audio_driver);
+}
+module_init(ssi_audio_init);
+
+static void __exit ssi_audio_exit(void)
+{
+ spi_unregister_driver(&ssi_audio_driver);
+}
+module_exit(ssi_audio_exit);
+
+MODULE_DESCRIPTION("SSI/I2S Audio Driver");
+MODULE_LICENSE("GPL");
--- a/include/asm-m68k/coldfire_edma.h
+++ b/include/asm-m68k/coldfire_edma.h
@@ -1,39 +1,102 @@
+/*
+ * coldfire_edma.h - eDMA driver for Coldfire MCF5445x
+ *
+ * Yaroslav Vinogradov yaroslav.vinogradov@freescale.com
+ *
+ * Copyright Freescale Semiconductor, Inc. 2007
+ *
+ * This program 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.
+ */
+
#ifndef _LINUX_COLDFIRE_DMA_H
#define _LINUX_COLDFIRE_DMA_H
#include <linux/interrupt.h>
+#include <asm/mcf5445x_edma.h>
-#define EDMA_DRIVER_NAME "ColdFire-eDMA"
-#define DMA_DEV_MINOR 1
+#define EDMA_DRIVER_NAME "ColdFire-eDMA"
+#define DMA_DEV_MINOR 1
#define EDMA_INT_CHANNEL_BASE 8
#define EDMA_INT_CONTROLLER_BASE 64
#define EDMA_CHANNELS 16
-
+
#define EDMA_IRQ_LEVEL 5
-
+
typedef irqreturn_t (*edma_irq_handler)(int, void *);
typedef void (*edma_error_handler)(int, void *);
-
+
+/* Setup transfer control descriptor (TCD)
+ * channel - descriptor number
+ * source - source address
+ * dest - destination address
+ * attr - attributes
+ * soff - source offset
+ * nbytes - number of bytes to be transfered in minor loop
+ * slast - last source address adjustment
+ * citer - major loop count
+ * biter - beggining minor loop count
+ * doff - destination offset
+ * dlast_sga - last destination address adjustment
+ * major_int - generate interrupt after each major loop
+ * disable_req - disable DMA request after major loop
+ */
void set_edma_params(int channel, u32 source, u32 dest,
- u32 attr, u32 soff, u32 nbytes, u32 slast,
- u32 citer, u32 biter, u32 doff, u32 dlast_sga);
-
-void start_edma_transfer(int channel, int major_int);
-
-void stop_edma_transfer(int channel);
-
-void confirm_edma_interrupt_handled(int channel);
-
+ u32 attr, u32 soff, u32 nbytes, u32 slast,
+ u32 citer, u32 biter, u32 doff, u32 dlast_sga,
+ int major_int, int disable_req);
+
+/* Starts eDMA transfer on specified channel
+ * channel - eDMA TCD number
+ */
+static inline void start_edma_transfer(int channel)
+{
+ MCF_EDMA_SERQ = channel;
+ MCF_EDMA_SSRT = channel;
+}
+
+/* Stops eDMA transfer
+ * channel - eDMA TCD number
+ */
+static inline void stop_edma_transfer(int channel)
+{
+ MCF_EDMA_CINT = channel;
+ MCF_EDMA_CERQ = channel;
+}
+
+
+/* Confirm that interrupt has been handled
+ * channel - eDMA TCD number
+ */
+static inline void confirm_edma_interrupt_handled(int channel)
+{
+ MCF_EDMA_CINT = channel;
+}
+
+/* Initialize eDMA controller */
void init_edma(void);
-
-int request_edma_channel(int channel,
- edma_irq_handler handler,
- edma_error_handler error_handler,
- void *dev,
- spinlock_t *lock,
- const char *device_id);
-
+
+/* Request eDMA channel:
+ * channel - eDMA TCD number
+ * handler - channel IRQ callback
+ * error_handler - error interrupt handler callback for channel
+ * dev - device
+ * lock - spinlock to be locked (can be NULL)
+ * device_id - device driver name for proc file system output
+ */
+int request_edma_channel(int channel,
+ edma_irq_handler handler,
+ edma_error_handler error_handler,
+ void *dev,
+ spinlock_t *lock,
+ const char *device_id);
+
+/* Free eDMA channel
+ * channel - eDMA TCD number
+ * dev - device
+ */
int free_edma_channel(int channel, void *dev);
-
#endif
--- /dev/null
+++ b/include/linux/spi/mcfqspi.h
@@ -0,0 +1,80 @@
+/****************************************************************************/
+
+/*
+ * mcfqspi.c - Master QSPI controller for the ColdFire processors
+ *
+ * (C) Copyright 2005, Intec Automation,
+ * Mike Lavender (mike@steroidmicros)
+ *
+
+ This program 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 program 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 this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+/* ------------------------------------------------------------------------- */
+
+#ifndef MCFQSPI_H_
+#define MCFQSPI_H_
+
+#define QSPI_CS_INIT 0x01
+#define QSPI_CS_ASSERT 0x02
+#define QSPI_CS_DROP 0x04
+
+#define QSPIIOCS_DOUT_HIZ 1 /* QMR[DOHIE] set hi-z dout between transfers */
+#define QSPIIOCS_BITS 2 /* QMR[BITS] set transfer size */
+#define QSPIIOCG_BITS 3 /* QMR[BITS] get transfer size */
+#define QSPIIOCS_CPOL 4 /* QMR[CPOL] set SCK inactive state */
+#define QSPIIOCS_CPHA 5 /* QMR[CPHA] set SCK phase, 1=rising edge */
+#define QSPIIOCS_BAUD 6 /* QMR[BAUD] set SCK baud rate divider */
+#define QSPIIOCS_QCD 7 /* QDLYR[QCD] set start delay */
+#define QSPIIOCS_DTL 8 /* QDLYR[DTL] set after delay */
+#define QSPIIOCS_CONT 9 /* continuous CS asserted during transfer */
+#define QSPIIOCS_READDATA 10 /* set data send during read */
+#define QSPIIOCS_ODD_MOD 11 /* if length of buffer is a odd number, 16-bit transfers */
+ /* are finalized with a 8-bit transfer */
+#define QSPIIOCS_DSP_MOD 12 /* transfers are bounded to 15/30 bytes (a multiple of 3 bytes = 1 DSPword) */
+#define QSPIIOCS_POLL_MOD 13 /* driver uses polling instead of interrupts */
+
+#define QSPIIOCS_SET_CSIV 14 /* sets CSIV flag (cs inactive level) */
+
+#ifdef CONFIG_M520x
+#undef MCF_GPIO_PAR_QSPI
+#define MCF_GPIO_PAR_QSPI (0xA4034)
+#endif
+
+struct coldfire_spi_master {
+ u16 bus_num;
+ u16 num_chipselect;
+ u8 irq_source;
+ u32 irq_vector;
+ u32 irq_mask;
+ u8 irq_lp;
+ u8 par_val;
+ u16 par_val16;
+ void (*cs_control)(u8 cs, u8 command);
+};
+
+
+struct coldfire_spi_chip {
+ u8 mode;
+ u8 bits_per_word;
+ u8 del_cs_to_clk;
+ u8 del_after_trans;
+ u16 void_write_data;
+};
+
+typedef struct qspi_read_data {
+ __u32 length;
+ __u8 *buf; /* data to send during read */
+ unsigned int loop : 1;
+} qspi_read_data;
+#endif /*MCFQSPI_H_*/
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