[ARM] pxa/stargate2: add support for Compact Flash/PCMCIA

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Eric Miao <eric.miao@marvell.com>

3 files changed, 176 insertions, 1 deletions

diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
index 276473543982..fbf965b31c14 100644
--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -217,7 +217,7 @@ config PCMCIA_PXA2XX
         depends on ARM && ARCH_PXA && PCMCIA
         depends on (ARCH_LUBBOCK || MACH_MAINSTONE || PXA_SHARPSL \
                     || MACH_ARMCORE || ARCH_PXA_PALM || TRIZEPS_PCMCIA \
-                    || ARCH_VIPER || ARCH_PXA_ESERIES)
+                    || ARCH_VIPER || ARCH_PXA_ESERIES || MACH_STARGATE2)
         help
           Say Y here to include support for the PXA2xx PCMCIA controller
 
diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile
index bbac46327227..047394d98ac2 100644
--- a/drivers/pcmcia/Makefile
+++ b/drivers/pcmcia/Makefile
@@ -73,5 +73,6 @@ pxa2xx-obj-$(CONFIG_TRIZEPS_PCMCIA)		+= pxa2xx_trizeps4.o
 pxa2xx-obj-$(CONFIG_MACH_PALMTX)                += pxa2xx_palmtx.o
 pxa2xx-obj-$(CONFIG_MACH_PALMLD)                += pxa2xx_palmld.o
 pxa2xx-obj-$(CONFIG_MACH_E740)                  += pxa2xx_e740.o
+pxa2xx-obj-$(CONFIG_MACH_STARGATE2)             += pxa2xx_stargate2.o
 
 obj-$(CONFIG_PCMCIA_PXA2XX)                     += pxa2xx_core.o $(pxa2xx-obj-y)
diff --git a/drivers/pcmcia/pxa2xx_stargate2.c b/drivers/pcmcia/pxa2xx_stargate2.c
new file mode 100644
index 000000000000..490749ea677f
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_stargate2.c
@@ -0,0 +1,174 @@
+/*
+ * linux/drivers/pcmcia/pxa2xx_stargate2.c
+ *
+ * Stargate 2 PCMCIA specific routines.
+ *
+ * Created:     December 6, 2005
+ * Author:      Ed C. Epp
+ * Copyright:   Intel Corp 2005
+ *              Jonathan Cameron <jic23@cam.ac.uk> 2009
+ *
+ * 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/interrupt.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+
+#include <pcmcia/ss.h>
+
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+
+#include "soc_common.h"
+
+#define SG2_S0_BUFF_CTL         120
+#define SG2_S0_POWER_CTL        108
+#define SG2_S0_GPIO_RESET       82
+#define SG2_S0_GPIO_DETECT      53
+#define SG2_S0_GPIO_READY       81
+
+static struct pcmcia_irqs irqs[] = {
+        { 0, IRQ_GPIO(SG2_S0_GPIO_DETECT), "PCMCIA0 CD" },
+};
+
+static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+        skt->irq = IRQ_GPIO(SG2_S0_GPIO_READY);
+        return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static void sg2_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+        soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+                                    struct pcmcia_state *state)
+{
+        state->detect = !gpio_get_value(SG2_S0_GPIO_DETECT);
+        state->ready  = !!gpio_get_value(SG2_S0_GPIO_READY);
+        state->bvd1   = 0; /* not available - battery detect on card */
+        state->bvd2   = 0; /* not available */
+        state->vs_3v  = 1; /* not available - voltage detect for card */
+        state->vs_Xv  = 0; /* not available */
+        state->wrprot = 0; /* not available - write protect */
+}
+
+static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+                                       const socket_state_t *state)
+{
+        /* Enable card power */
+        switch (state->Vcc) {
+        case 0:
+                /* sets power ctl register high */
+                gpio_set_value(SG2_S0_POWER_CTL, 1);
+                break;
+        case 33:
+        case 50:
+                /* sets power control register low (clear) */
+                gpio_set_value(SG2_S0_POWER_CTL, 0);
+                msleep(100);
+                break;
+        default:
+                pr_err("%s(): bad Vcc %u\n",
+                       __func__, state->Vcc);
+                return -1;
+        }
+
+        /* reset */
+        gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET));
+
+        return 0;
+}
+
+static void sg2_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+        soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static void sg2_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+        soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
+        .owner                  = THIS_MODULE,
+        .hw_init                = sg2_pcmcia_hw_init,
+        .hw_shutdown            = sg2_pcmcia_hw_shutdown,
+        .socket_state           = sg2_pcmcia_socket_state,
+        .configure_socket       = sg2_pcmcia_configure_socket,
+        .socket_init            = sg2_pcmcia_socket_init,
+        .socket_suspend         = sg2_pcmcia_socket_suspend,
+        .nr                     = 1,
+};
+
+static struct platform_device *sg2_pcmcia_device;
+
+static int __init sg2_pcmcia_init(void)
+{
+        int ret;
+
+        if (!machine_is_stargate2())
+                return -ENODEV;
+
+        sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+        if (!sg2_pcmcia_device)
+                return -ENOMEM;
+
+        ret = gpio_request(SG2_S0_BUFF_CTL, "SG2 CF buff ctl");
+        if (ret)
+                goto error_put_platform_device;
+        ret = gpio_request(SG2_S0_POWER_CTL, "SG2 CF power ctl");
+        if (ret)
+                goto error_free_gpio_buff_ctl;
+        ret = gpio_request(SG2_S0_GPIO_RESET, "SG2 CF reset");
+        if (ret)
+                goto error_free_gpio_power_ctl;
+        /* Set gpio directions */
+        gpio_direction_output(SG2_S0_BUFF_CTL, 0);
+        gpio_direction_output(SG2_S0_POWER_CTL, 1);
+        gpio_direction_output(SG2_S0_GPIO_RESET, 1);
+
+        ret = platform_device_add_data(sg2_pcmcia_device,
+                                       &sg2_pcmcia_ops,
+                                       sizeof(sg2_pcmcia_ops));
+        if (ret)
+                goto error_free_gpio_reset;
+
+        ret = platform_device_add(sg2_pcmcia_device);
+        if (ret)
+                goto error_free_gpio_reset;
+
+        return 0;
+error_free_gpio_reset:
+        gpio_free(SG2_S0_GPIO_RESET);
+error_free_gpio_power_ctl:
+        gpio_free(SG2_S0_POWER_CTL);
+error_free_gpio_buff_ctl:
+        gpio_free(SG2_S0_BUFF_CTL);
+error_put_platform_device:
+        platform_device_put(sg2_pcmcia_device);
+
+        return ret;
+}
+
+static void __exit sg2_pcmcia_exit(void)
+{
+        platform_device_unregister(sg2_pcmcia_device);
+        gpio_free(SG2_S0_BUFF_CTL);
+        gpio_free(SG2_S0_POWER_CTL);
+        gpio_free(SG2_S0_GPIO_RESET);
+}
+
+fs_initcall(sg2_pcmcia_init);
+module_exit(sg2_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pxa2xx-pcmcia");