mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-28 01:11:52 +02:00
ba2e2fa7be
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@14454 3c298f89-4303-0410-b956-a3cf2f4a3e73
284 lines
8.6 KiB
Diff
284 lines
8.6 KiB
Diff
--- a/drivers/pcmcia/Makefile
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+++ b/drivers/pcmcia/Makefile
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@@ -69,4 +69,4 @@ sa1100_cs-$(CONFIG_SA1100_SIMPAD) += sa
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pxa2xx_cs-$(CONFIG_ARCH_LUBBOCK) += pxa2xx_lubbock.o sa1111_generic.o
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pxa2xx_cs-$(CONFIG_MACH_MAINSTONE) += pxa2xx_mainstone.o
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pxa2xx_cs-$(CONFIG_PXA_SHARPSL) += pxa2xx_sharpsl.o
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-
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+pxa2xx_cs-$(CONFIG_ARCH_GUMSTIX) += pxa2xx_gumstix.o
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--- /dev/null
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+++ b/drivers/pcmcia/pxa2xx_gumstix.c
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@@ -0,0 +1,272 @@
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+/*
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+ * linux/drivers/pcmcia/pxa2xx_gumstix.c
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+ *
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+ * Gumstix PCMCIA specific routines. Based on Mainstone
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+ *
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+ * Copyright 2004, Craig Hughes <craig@gumstix.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/init.h>
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+#include <linux/kernel.h>
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+#include <linux/errno.h>
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+#include <linux/interrupt.h>
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+#include <linux/device.h>
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+#include <linux/platform_device.h>
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+
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+#include <pcmcia/ss.h>
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+
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+#include <asm/hardware.h>
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+#include <asm/delay.h>
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+#include <asm/arch/pxa-regs.h>
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+#include <asm/irq.h>
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+#include <asm/io.h>
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+
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+#include <asm/arch/gumstix.h>
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+
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+#include "soc_common.h"
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+
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+static struct pcmcia_irqs gumstix_pcmcia_irqs0[] = {
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+ { 0, GUMSTIX_S0_nCD_IRQ, "CF0 nCD" },
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+ { 0, GUMSTIX_S0_nSTSCHG_IRQ, "CF0 nSTSCHG" },
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+};
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+
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+static struct pcmcia_irqs gumstix_pcmcia_irqs1[] = {
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+ { 1, GUMSTIX_S1_nCD_IRQ, "CF1 nCD" },
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+ { 1, GUMSTIX_S1_nSTSCHG_IRQ, "CF1 nSTSCHG" },
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+};
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+
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+static int net_cf_vx_mode = 0;
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+
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+static int gumstix_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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+{
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+ if(skt->nr == 0)
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+ {
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+ pxa_gpio_mode(GPIO_GUMSTIX_nSTSCHG_0_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nCD_0_MD);
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+ if(net_cf_vx_mode)
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+ pxa_gpio_mode(GPIO_GUMSTIX_PRDY_nBSY_0_OLD_MD);
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+ else
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+ pxa_gpio_mode(GPIO_GUMSTIX_PRDY_nBSY_0_MD);
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+ } else {
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+ pxa_gpio_mode(GPIO_GUMSTIX_nSTSCHG_1_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nCD_1_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_PRDY_nBSY_1_MD);
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+ }
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+
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+ pxa_gpio_mode(GPIO_GUMSTIX_nPOE_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nPWE_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nPIOR_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nPIOW_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nPCE_1_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nPCE_2_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_pSKTSEL_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nPREG_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nPWAIT_MD);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nIOIS16_MD);
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+
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+ skt->irq = (skt->nr == 0) ? ((net_cf_vx_mode == 0) ? GUMSTIX_S0_PRDY_nBSY_IRQ : GUMSTIX_S0_PRDY_nBSY_OLD_IRQ) : GUMSTIX_S1_PRDY_nBSY_IRQ;
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+
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+ return (skt->nr == 0) ? soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0)) :
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+ soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
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+}
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+
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+static void gumstix_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
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+{
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+ if(skt->nr == 0)
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+ {
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+ soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
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+ } else {
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+ soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
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+ }
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+}
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+
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+static void gumstix_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
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+ struct pcmcia_state *state)
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+{
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+ unsigned int cd, prdy_nbsy, nbvd1;
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+ if(skt->nr == 0)
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+ {
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+ cd = GPIO_GUMSTIX_nCD_0;
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+ if(net_cf_vx_mode)
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+ prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0_OLD;
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+ else
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+ prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0;
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+ nbvd1 = GPIO_GUMSTIX_nBVD1_0;
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+ } else {
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+ cd = GPIO_GUMSTIX_nCD_1;
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+ prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_1;
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+ nbvd1 = GPIO_GUMSTIX_nBVD1_1;
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+ }
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+ state->detect = !(GPLR(cd) & GPIO_bit(cd));
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+ state->ready = !!(GPLR(prdy_nbsy) & GPIO_bit(prdy_nbsy));
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+ state->bvd1 = !!(GPLR(nbvd1) & GPIO_bit(nbvd1));
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+ state->bvd2 = 1;
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+ state->vs_3v = 0;
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+ state->vs_Xv = 0;
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+ state->wrprot = 0;
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+}
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+
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+static int gumstix_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
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+ const socket_state_t *state)
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+{
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+ return 0;
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+}
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+
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+static void gumstix_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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+{
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+ if(skt->nr) {
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+ soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
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+ } else {
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+ soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
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+ }
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+}
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+
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+static void gumstix_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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+{
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+ if(skt->nr) {
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+ soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
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+ } else {
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+ soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
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+ }
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+}
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+
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+static struct pcmcia_low_level gumstix_pcmcia_ops = {
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+ .owner = THIS_MODULE,
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+ .hw_init = gumstix_pcmcia_hw_init,
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+ .hw_shutdown = gumstix_pcmcia_hw_shutdown,
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+ .socket_state = gumstix_pcmcia_socket_state,
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+ .configure_socket = gumstix_pcmcia_configure_socket,
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+ .socket_init = gumstix_pcmcia_socket_init,
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+ .socket_suspend = gumstix_pcmcia_socket_suspend,
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+ .nr = 2,
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+};
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+
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+static struct platform_device *gumstix_pcmcia_device;
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+
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+inline void __init gumstix_pcmcia_cpld_clk(void)
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+{
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+ GPCR(GPIO_GUMSTIX_nPOE) = GPIO_bit(GPIO_GUMSTIX_nPOE);
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+ GPSR(GPIO_GUMSTIX_nPOE) = GPIO_bit(GPIO_GUMSTIX_nPOE);
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+}
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+
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+inline unsigned char __init gumstix_pcmcia_cpld_read_bits(int bits)
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+{
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+ unsigned char result = 0;
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+ unsigned int shift = 0;
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+ while(bits--)
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+ {
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+ result |= !!(GPLR(GPIO_GUMSTIX_nCD_0) & GPIO_bit(GPIO_GUMSTIX_nCD_0)) << shift;
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+ shift ++;
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+ gumstix_pcmcia_cpld_clk();
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+ }
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+ printk("CPLD responded with: %02x\n",result);
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+ return result;
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+}
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+
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+/* We use the CPLD on the CF-CF card to read a value from a shift register. If we can read that
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+ * magic sequence, then we have 2 CF cards; otherwise we assume just one
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+ * The CPLD will send the value of the shift register on GPIO11 (the CD line for slot 0)
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+ * when RESET is held in reset. We use GPIO48 (nPOE) as a clock signal,
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+ * GPIO52/53 (card enable for both cards) to control read/write to the shift register
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+ */
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+static void __init gumstix_count_cards(void)
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+{
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+ pxa_gpio_mode(GPIO_GUMSTIX_nPOE | GPIO_OUT);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nPCE_1 | GPIO_OUT);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nPCE_2 | GPIO_OUT);
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+ pxa_gpio_mode(GPIO_GUMSTIX_nCD_0 | GPIO_IN);
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+ if(net_cf_vx_mode)
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+ pxa_gpio_mode(GPIO_GUMSTIX_CF_OLD_RESET | GPIO_OUT);
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+ else
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+ pxa_gpio_mode(GPIO_GUMSTIX_CF_RESET | GPIO_OUT);
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+
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+ // Enter reset
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+ if(net_cf_vx_mode)
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+ GPSR(GPIO_GUMSTIX_CF_OLD_RESET) = GPIO_bit(GPIO_GUMSTIX_CF_OLD_RESET);
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+ else
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+ GPSR(GPIO_GUMSTIX_CF_RESET) = GPIO_bit(GPIO_GUMSTIX_CF_RESET);
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+
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+ // Setup the shift register
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+ GPSR(GPIO_GUMSTIX_nPCE_1) = GPIO_bit(GPIO_GUMSTIX_nPCE_1);
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+ GPCR(GPIO_GUMSTIX_nPCE_2) = GPIO_bit(GPIO_GUMSTIX_nPCE_2);
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+
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+ // Tick the clock to program the shift register
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+ gumstix_pcmcia_cpld_clk();
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+
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+ // Now set shift register into read mode
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+ GPCR(GPIO_GUMSTIX_nPCE_1) = GPIO_bit(GPIO_GUMSTIX_nPCE_1);
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+ GPSR(GPIO_GUMSTIX_nPCE_2) = GPIO_bit(GPIO_GUMSTIX_nPCE_2);
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+
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+ // We can read the bits now -- 0xC2 means "Dual compact flash"
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+ if(gumstix_pcmcia_cpld_read_bits(8) != 0xC2)
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+ {
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+ // We do not have 2 CF slots
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+ gumstix_pcmcia_ops.nr = 1;
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+ }
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+}
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+
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+#ifdef CONFIG_ARCH_GUMSTIX_VERDEX
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+static void __init gumstix_check_if_netCF_vx(void)
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+{
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+ void *network_controller_memory = ioremap(0x04000300,16);
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+ // Look for the special 91c111 value in the bank select register
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+ if((0xff00 & readw(network_controller_memory+0x0e)) == 0x3300) {
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+ printk("Detected netCF-vx board: using older GPIO configuration\n");
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+ net_cf_vx_mode = 1;
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+ } else {
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+ printk("Not netCF-vx board: using newer GPIO configuration\n");
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+ net_cf_vx_mode = 0;
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+ }
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+ iounmap(network_controller_memory);
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+}
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+#endif
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+
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+static int __init gumstix_pcmcia_init(void)
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+{
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+ int ret;
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+
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+#ifdef CONFIG_ARCH_GUMSTIX_VERDEX
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+ gumstix_check_if_netCF_vx();
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+#endif
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+
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+ gumstix_count_cards();
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+
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+ udelay(50);
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+ if(net_cf_vx_mode)
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+ GPCR(GPIO_GUMSTIX_CF_OLD_RESET) = GPIO_bit(GPIO_GUMSTIX_CF_OLD_RESET);
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+ else
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+ GPCR(GPIO_GUMSTIX_CF_RESET) = GPIO_bit(GPIO_GUMSTIX_CF_RESET);
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+
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+ gumstix_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
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+ if (!gumstix_pcmcia_device)
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+ return -ENOMEM;
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+
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+ gumstix_pcmcia_device->dev.platform_data = &gumstix_pcmcia_ops;
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+
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+ ret = platform_device_add(gumstix_pcmcia_device);
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+ if (ret)
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+ platform_device_put(gumstix_pcmcia_device);
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+
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+ return ret;
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+}
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+
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+static void __exit gumstix_pcmcia_exit(void)
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+{
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+ /*
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+ * This call is supposed to free our gumstix_pcmcia_device.
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+ * Unfortunately platform_device don't have a free method, and
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+ * we can't assume it's free of any reference at this point so we
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+ * can't free it either.
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+ */
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+ platform_device_unregister(gumstix_pcmcia_device);
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+}
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+
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+fs_initcall(gumstix_pcmcia_init);
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+module_exit(gumstix_pcmcia_exit);
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+
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+MODULE_LICENSE("GPL");
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