[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>
diff --git a/drivers/pcmcia/pxa2xx_e740.c b/drivers/pcmcia/pxa2xx_e740.c
new file mode 100644
index 0000000..f663a01
--- /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");