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openwrt/target/linux/pxa/patches-2.6.21/005-compact-flash.patch
Imre Kaloz 261802269d incomplete Gumstix support 
SVN-Revision: 10955
2008-04-27 16:56:19 +00:00

288 lines
8.9 KiB
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Index: linux-2.6.21gum/drivers/pcmcia/Makefile
===================================================================
--- linux-2.6.21gum.orig/drivers/pcmcia/Makefile
+++ linux-2.6.21gum/drivers/pcmcia/Makefile
@@ -69,4 +69,4 @@ sa1100_cs-$(CONFIG_SA1100_SIMPAD) += sa
pxa2xx_cs-$(CONFIG_ARCH_LUBBOCK) += pxa2xx_lubbock.o sa1111_generic.o
pxa2xx_cs-$(CONFIG_MACH_MAINSTONE) += pxa2xx_mainstone.o
pxa2xx_cs-$(CONFIG_PXA_SHARPSL) += pxa2xx_sharpsl.o
-
+pxa2xx_cs-$(CONFIG_ARCH_GUMSTIX) += pxa2xx_gumstix.o
Index: linux-2.6.21gum/drivers/pcmcia/pxa2xx_gumstix.c
===================================================================
--- /dev/null
+++ linux-2.6.21gum/drivers/pcmcia/pxa2xx_gumstix.c
@@ -0,0 +1,272 @@
+/*
+ * linux/drivers/pcmcia/pxa2xx_gumstix.c
+ *
+ * Gumstix PCMCIA specific routines. Based on Mainstone
+ *
+ * Copyright 2004, Craig Hughes <craig@gumstix.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+
+#include <pcmcia/ss.h>
+
+#include <asm/hardware.h>
+#include <asm/delay.h>
+#include <asm/arch/pxa-regs.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#include <asm/arch/gumstix.h>
+
+#include "soc_common.h"
+
+static struct pcmcia_irqs gumstix_pcmcia_irqs0[] = {
+ { 0, GUMSTIX_S0_nCD_IRQ, "CF0 nCD" },
+ { 0, GUMSTIX_S0_nSTSCHG_IRQ, "CF0 nSTSCHG" },
+};
+
+static struct pcmcia_irqs gumstix_pcmcia_irqs1[] = {
+ { 1, GUMSTIX_S1_nCD_IRQ, "CF1 nCD" },
+ { 1, GUMSTIX_S1_nSTSCHG_IRQ, "CF1 nSTSCHG" },
+};
+
+static int net_cf_vx_mode = 0;
+
+static int gumstix_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+ if(skt->nr == 0)
+ {
+ pxa_gpio_mode(GPIO_GUMSTIX_nSTSCHG_0_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_nCD_0_MD);
+ if(net_cf_vx_mode)
+ pxa_gpio_mode(GPIO_GUMSTIX_PRDY_nBSY_0_OLD_MD);
+ else
+ pxa_gpio_mode(GPIO_GUMSTIX_PRDY_nBSY_0_MD);
+ } else {
+ pxa_gpio_mode(GPIO_GUMSTIX_nSTSCHG_1_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_nCD_1_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_PRDY_nBSY_1_MD);
+ }
+
+ pxa_gpio_mode(GPIO_GUMSTIX_nPOE_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_nPWE_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_nPIOR_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_nPIOW_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_nPCE_1_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_nPCE_2_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_pSKTSEL_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_nPREG_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_nPWAIT_MD);
+ pxa_gpio_mode(GPIO_GUMSTIX_nIOIS16_MD);
+
+ 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;
+
+ return (skt->nr == 0) ? soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0)) :
+ soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
+}
+
+static void gumstix_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+ if(skt->nr == 0)
+ {
+ soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
+ } else {
+ soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
+ }
+}
+
+static void gumstix_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+ struct pcmcia_state *state)
+{
+ unsigned int cd, prdy_nbsy, nbvd1;
+ if(skt->nr == 0)
+ {
+ cd = GPIO_GUMSTIX_nCD_0;
+ if(net_cf_vx_mode)
+ prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0_OLD;
+ else
+ prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0;
+ nbvd1 = GPIO_GUMSTIX_nBVD1_0;
+ } else {
+ cd = GPIO_GUMSTIX_nCD_1;
+ prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_1;
+ nbvd1 = GPIO_GUMSTIX_nBVD1_1;
+ }
+ state->detect = !(GPLR(cd) & GPIO_bit(cd));
+ state->ready = !!(GPLR(prdy_nbsy) & GPIO_bit(prdy_nbsy));
+ state->bvd1 = !!(GPLR(nbvd1) & GPIO_bit(nbvd1));
+ state->bvd2 = 1;
+ state->vs_3v = 0;
+ state->vs_Xv = 0;
+ state->wrprot = 0;
+}
+
+static int gumstix_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+ const socket_state_t *state)
+{
+ return 0;
+}
+
+static void gumstix_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+ if(skt->nr) {
+ soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
+ } else {
+ soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
+ }
+}
+
+static void gumstix_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+ if(skt->nr) {
+ soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
+ } else {
+ soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
+ }
+}
+
+static struct pcmcia_low_level gumstix_pcmcia_ops = {
+ .owner = THIS_MODULE,
+ .hw_init = gumstix_pcmcia_hw_init,
+ .hw_shutdown = gumstix_pcmcia_hw_shutdown,
+ .socket_state = gumstix_pcmcia_socket_state,
+ .configure_socket = gumstix_pcmcia_configure_socket,
+ .socket_init = gumstix_pcmcia_socket_init,
+ .socket_suspend = gumstix_pcmcia_socket_suspend,
+ .nr = 2,
+};
+
+static struct platform_device *gumstix_pcmcia_device;
+
+inline void __init gumstix_pcmcia_cpld_clk(void)
+{
+ GPCR(GPIO_GUMSTIX_nPOE) = GPIO_bit(GPIO_GUMSTIX_nPOE);
+ GPSR(GPIO_GUMSTIX_nPOE) = GPIO_bit(GPIO_GUMSTIX_nPOE);
+}
+
+inline unsigned char __init gumstix_pcmcia_cpld_read_bits(int bits)
+{
+ unsigned char result = 0;
+ unsigned int shift = 0;
+ while(bits--)
+ {
+ result |= !!(GPLR(GPIO_GUMSTIX_nCD_0) & GPIO_bit(GPIO_GUMSTIX_nCD_0)) << shift;
+ shift ++;
+ gumstix_pcmcia_cpld_clk();
+ }
+ printk("CPLD responded with: %02x\n",result);
+ return result;
+}
+
+/* We use the CPLD on the CF-CF card to read a value from a shift register. If we can read that
+ * magic sequence, then we have 2 CF cards; otherwise we assume just one
+ * The CPLD will send the value of the shift register on GPIO11 (the CD line for slot 0)
+ * when RESET is held in reset. We use GPIO48 (nPOE) as a clock signal,
+ * GPIO52/53 (card enable for both cards) to control read/write to the shift register
+ */
+static void __init gumstix_count_cards(void)
+{
+ pxa_gpio_mode(GPIO_GUMSTIX_nPOE | GPIO_OUT);
+ pxa_gpio_mode(GPIO_GUMSTIX_nPCE_1 | GPIO_OUT);
+ pxa_gpio_mode(GPIO_GUMSTIX_nPCE_2 | GPIO_OUT);
+ pxa_gpio_mode(GPIO_GUMSTIX_nCD_0 | GPIO_IN);
+ if(net_cf_vx_mode)
+ pxa_gpio_mode(GPIO_GUMSTIX_CF_OLD_RESET | GPIO_OUT);
+ else
+ pxa_gpio_mode(GPIO_GUMSTIX_CF_RESET | GPIO_OUT);
+
+ // Enter reset
+ if(net_cf_vx_mode)
+ GPSR(GPIO_GUMSTIX_CF_OLD_RESET) = GPIO_bit(GPIO_GUMSTIX_CF_OLD_RESET);
+ else
+ GPSR(GPIO_GUMSTIX_CF_RESET) = GPIO_bit(GPIO_GUMSTIX_CF_RESET);
+
+ // Setup the shift register
+ GPSR(GPIO_GUMSTIX_nPCE_1) = GPIO_bit(GPIO_GUMSTIX_nPCE_1);
+ GPCR(GPIO_GUMSTIX_nPCE_2) = GPIO_bit(GPIO_GUMSTIX_nPCE_2);
+
+ // Tick the clock to program the shift register
+ gumstix_pcmcia_cpld_clk();
+
+ // Now set shift register into read mode
+ GPCR(GPIO_GUMSTIX_nPCE_1) = GPIO_bit(GPIO_GUMSTIX_nPCE_1);
+ GPSR(GPIO_GUMSTIX_nPCE_2) = GPIO_bit(GPIO_GUMSTIX_nPCE_2);
+
+ // We can read the bits now -- 0xC2 means "Dual compact flash"
+ if(gumstix_pcmcia_cpld_read_bits(8) != 0xC2)
+ {
+ // We do not have 2 CF slots
+ gumstix_pcmcia_ops.nr = 1;
+ }
+}
+
+#ifdef CONFIG_ARCH_GUMSTIX_VERDEX
+static void __init gumstix_check_if_netCF_vx(void)
+{
+ void *network_controller_memory = ioremap(0x04000300,16);
+ // Look for the special 91c111 value in the bank select register
+ if((0xff00 & readw(network_controller_memory+0x0e)) == 0x3300) {
+ printk("Detected netCF-vx board: using older GPIO configuration\n");
+ net_cf_vx_mode = 1;
+ } else {
+ printk("Not netCF-vx board: using newer GPIO configuration\n");
+ net_cf_vx_mode = 0;
+ }
+ iounmap(network_controller_memory);
+}
+#endif
+
+static int __init gumstix_pcmcia_init(void)
+{
+ int ret;
+
+#ifdef CONFIG_ARCH_GUMSTIX_VERDEX
+ gumstix_check_if_netCF_vx();
+#endif
+
+ gumstix_count_cards();
+
+ udelay(50);
+ if(net_cf_vx_mode)
+ GPCR(GPIO_GUMSTIX_CF_OLD_RESET) = GPIO_bit(GPIO_GUMSTIX_CF_OLD_RESET);
+ else
+ GPCR(GPIO_GUMSTIX_CF_RESET) = GPIO_bit(GPIO_GUMSTIX_CF_RESET);
+
+ gumstix_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+ if (!gumstix_pcmcia_device)
+ return -ENOMEM;
+
+ gumstix_pcmcia_device->dev.platform_data = &gumstix_pcmcia_ops;
+
+ ret = platform_device_add(gumstix_pcmcia_device);
+ if (ret)
+ platform_device_put(gumstix_pcmcia_device);
+
+ return ret;
+}
+
+static void __exit gumstix_pcmcia_exit(void)
+{
+ /*
+ * This call is supposed to free our gumstix_pcmcia_device.
+ * Unfortunately platform_device don't have a free method, and
+ * we can't assume it's free of any reference at this point so we
+ * can't free it either.
+ */
+ platform_device_unregister(gumstix_pcmcia_device);
+}
+
+fs_initcall(gumstix_pcmcia_init);
+module_exit(gumstix_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
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