[PCMCIA] e740 PCMCIA socket driver.

This patch adds the platform specific support needed to control the
PCMCIA hardware on the Toshiba e740.

Signed-off-by: Ian Molton <spyro@f2s.com>

1 files changed, 176 insertions, 0 deletions

diff --git a/drivers/pcmcia/pxa2xx_e740.c b/drivers/pcmcia/pxa2xx_e740.c
new file mode 100644
index 000000000000..f663a011bf4a
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_e740.c
@@ -0,0 +1,176 @@
+/*
+ * Toshiba e740 PCMCIA specific routines.
+ *
+ * (c) 2004 Ian Molton <spyro@f2s.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/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
+#include <mach/hardware.h>
+#include <mach/pxa-regs.h>
+#include <mach/eseries-gpio.h>
+
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+
+#include "soc_common.h"
+
+static struct pcmcia_irqs cd_irqs[] = {
+        {
+                .sock = 0,
+                .irq  = IRQ_GPIO(GPIO_E740_PCMCIA_CD0),
+                .str  = "CF card detect"
+        },
+        {
+                .sock = 1,
+                .irq  = IRQ_GPIO(GPIO_E740_PCMCIA_CD1),
+                .str  = "Wifi switch"
+        },
+};
+
+static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+        skt->irq = skt->nr == 0 ? IRQ_GPIO(GPIO_E740_PCMCIA_RDY0) :
+                                IRQ_GPIO(GPIO_E740_PCMCIA_RDY1);
+
+        return soc_pcmcia_request_irqs(skt, &cd_irqs[skt->nr], 1);
+}
+
+/*
+ * Release all resources.
+ */
+static void e740_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+        soc_pcmcia_free_irqs(skt, &cd_irqs[skt->nr], 1);
+}
+
+static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+                                        struct pcmcia_state *state)
+{
+        if (skt->nr == 0) {
+                state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD0) ? 0 : 1;
+                state->ready  = gpio_get_value(GPIO_E740_PCMCIA_RDY0) ? 1 : 0;
+        } else {
+                state->detect = gpio_get_value(GPIO_E740_PCMCIA_CD1) ? 0 : 1;
+                state->ready  = gpio_get_value(GPIO_E740_PCMCIA_RDY1) ? 1 : 0;
+        }
+
+        state->vs_3v  = 1;
+        state->bvd1   = 1;
+        state->bvd2   = 1;
+        state->wrprot = 0;
+        state->vs_Xv  = 0;
+}
+
+static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+                                        const socket_state_t *state)
+{
+        if (state->flags & SS_RESET) {
+                if (skt->nr == 0)
+                        gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
+                else
+                        gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
+        } else {
+                if (skt->nr == 0)
+                        gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
+                else
+                        gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
+        }
+
+        switch (state->Vcc) {
+        case 0: /* Socket off */
+                if (skt->nr == 0)
+                        gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
+                else
+                        gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
+                break;
+        case 50:
+        case 33: /* socket on */
+                if (skt->nr == 0)
+                        gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
+                else
+                        gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
+                break;
+        default:
+                printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
+        }
+
+        return 0;
+}
+
+/*
+ * Enable card status IRQs on (re-)initialisation.  This can
+ * be called at initialisation, power management event, or
+ * pcmcia event.
+ */
+static void e740_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+        soc_pcmcia_enable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
+}
+
+/*
+ * Disable card status IRQs on suspend.
+ */
+static void e740_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+        soc_pcmcia_disable_irqs(skt, cd_irqs, ARRAY_SIZE(cd_irqs));
+}
+
+static struct pcmcia_low_level e740_pcmcia_ops = {
+        .owner            = THIS_MODULE,
+        .hw_init          = e740_pcmcia_hw_init,
+        .hw_shutdown      = e740_pcmcia_hw_shutdown,
+        .socket_state     = e740_pcmcia_socket_state,
+        .configure_socket = e740_pcmcia_configure_socket,
+        .socket_init      = e740_pcmcia_socket_init,
+        .socket_suspend   = e740_pcmcia_socket_suspend,
+        .nr               = 2,
+};
+
+static struct platform_device *e740_pcmcia_device;
+
+static int __init e740_pcmcia_init(void)
+{
+        int ret;
+
+        if (!machine_is_e740())
+                return -ENODEV;
+
+        e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+        if (!e740_pcmcia_device)
+                return -ENOMEM;
+
+        ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
+                                        sizeof(e740_pcmcia_ops));
+
+        if (!ret)
+                ret = platform_device_add(e740_pcmcia_device);
+
+        if (ret)
+                platform_device_put(e740_pcmcia_device);
+
+        return ret;
+}
+
+static void __exit e740_pcmcia_exit(void)
+{
+        platform_device_unregister(e740_pcmcia_device);
+}
+
+module_init(e740_pcmcia_init);
+module_exit(e740_pcmcia_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
+MODULE_ALIAS("platform:pxa2xx-pcmcia");
+MODULE_DESCRIPTION("e740 PCMCIA platform support");