From 76a102bd5c9d792db19c6c72eafdecea0311a0c9 Mon Sep 17 00:00:00 2001
From: Craig Hughes <craig@gumstix.com>
Date: Fri, 30 Oct 2009 14:16:27 -0400
Subject: [PATCH] [ARM] pxa: Gumstix Verdex PCMCIA support

Needed for the Libertas CS wireless device.

Signed-off-by: Bobby Powers <bobbypowers@gmail.com>
---
 drivers/pcmcia/Kconfig          |    3 +-
 drivers/pcmcia/Makefile         |    3 +
 drivers/pcmcia/pxa2xx_gumstix.c |  194 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 199 insertions(+), 1 deletions(-)
 create mode 100644 drivers/pcmcia/pxa2xx_gumstix.c

--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -212,7 +212,7 @@ config PCMCIA_PXA2XX
 		    || MACH_ARMCORE || ARCH_PXA_PALM || TRIZEPS_PCMCIA \
 		    || ARCOM_PCMCIA || ARCH_PXA_ESERIES || MACH_STARGATE2 \
 		    || MACH_VPAC270 || MACH_BALLOON3 || MACH_COLIBRI \
-		    || MACH_COLIBRI320)
+		    || MACH_COLIBRI320 || ARCH_GUMSTIX)
 	select PCMCIA_SOC_COMMON
 	help
 	  Say Y here to include support for the PXA2xx PCMCIA controller
--- a/drivers/pcmcia/Makefile
+++ b/drivers/pcmcia/Makefile
@@ -70,6 +70,9 @@ pxa2xx-obj-$(CONFIG_MACH_BALLOON3)		+= p
 pxa2xx-obj-$(CONFIG_MACH_COLIBRI)		+= pxa2xx_colibri.o
 pxa2xx-obj-$(CONFIG_MACH_COLIBRI320)		+= pxa2xx_colibri.o
 
+pxa2xx-obj-$(CONFIG_MACH_GUMSTIX_VERDEX)	+= pxa2xx_cs.o
+pxa2xx_cs-objs					:= pxa2xx_gumstix.o
+
 obj-$(CONFIG_PCMCIA_PXA2XX)			+= pxa2xx_base.o $(pxa2xx-obj-y)
 
 obj-$(CONFIG_PCMCIA_XXS1500)			+= xxs1500_ss.o
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_gumstix.c
@@ -0,0 +1,195 @@
+/*
+ * 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/irq.h>
+#include <linux/gpio.h>
+
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+
+#include <linux/gpio-pxa.h>
+
+#include <pcmcia/ss.h>
+
+#include <mach/hardware.h>
+#include <asm/mach-types.h>
+
+#include <mach/pxa27x.h>
+
+#include <asm/io.h>
+#include <mach/gpio.h>
+#include <mach/gumstix.h>
+#include "soc_common.h"
+
+#define ARRAY_AND_SIZE(x)	(x), ARRAY_SIZE(x)
+
+#define BANK_OFF(n)     (((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2))
+#define GPLR(x)         __REG2(0x40E00000, BANK_OFF((x) >> 5))
+
+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)
+{
+/* Note: The verdex_pcmcia_pin_config is moved to gumstix_verdex.c in order to use mfp_pxa2xx_config
+   for board-specific pin configuration instead of the old deprecated pxa_gpio_mode function.  Thus,
+   only the IRQ init is still needed to be done here. */
+	skt->socket.pci_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));
+	}
+
+	if (net_cf_vx_mode) {
+	    	gpio_free(GPIO_GUMSTIX_CF_OLD_RESET);
+	} else {
+		gpio_free(GPIO_GUMSTIX_CF_RESET);
+	}
+
+}
+
+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 = !!gpio_get_value(cd);
+	state->ready  = !!gpio_get_value(prdy_nbsy);
+	state->bvd1   = !!gpio_get_value(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;
+
+extern int __init gumstix_get_cf_cards(void);
+
+#ifdef CONFIG_MACH_GUMSTIX_VERDEX
+extern int __init gumstix_check_if_netCF_vx(void);
+#endif
+
+static int __init gumstix_pcmcia_init(void)
+{
+	int ret;
+
+#ifdef CONFIG_MACH_GUMSTIX_VERDEX
+	net_cf_vx_mode = gumstix_check_if_netCF_vx();
+#endif
+
+	gumstix_pcmcia_ops.nr = gumstix_get_cf_cards();
+
+	gumstix_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+	if (!gumstix_pcmcia_device)
+		return -ENOMEM;
+
+	ret = platform_device_add_data(gumstix_pcmcia_device, &gumstix_pcmcia_ops,
+				       sizeof(gumstix_pcmcia_ops));
+
+	if (ret == 0) {
+		printk(KERN_INFO "Registering gumstix PCMCIA interface.\n");
+		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");
