[ARM] 5283/1: pxa: add CM-X255 pcmcia support

Signed-off-by: Russ Dill <russ.dill@gmail.com>
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 154 insertions, 0 deletions

diff --git a/drivers/pcmcia/pxa2xx_cm_x255.c b/drivers/pcmcia/pxa2xx_cm_x255.c
new file mode 100644
index 0000000..7c8bcb4
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_cm_x255.c
@@ -0,0 +1,154 @@
+/*
+ * linux/drivers/pcmcia/pxa/pxa_cm_x255.c
+ *
+ * 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.
+ *
+ * Compulab Ltd., 2003, 2007, 2008
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ */
+
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+
+#include <asm/mach-types.h>
+#include <mach/pxa-regs.h>
+
+#include "soc_common.h"
+
+#define GPIO_PCMCIA_SKTSEL	(54)
+#define GPIO_PCMCIA_S0_CD_VALID	(16)
+#define GPIO_PCMCIA_S1_CD_VALID	(17)
+#define GPIO_PCMCIA_S0_RDYINT	(6)
+#define GPIO_PCMCIA_S1_RDYINT	(8)
+#define GPIO_PCMCIA_RESET	(9)
+
+#define PCMCIA_S0_CD_VALID	IRQ_GPIO(GPIO_PCMCIA_S0_CD_VALID)
+#define PCMCIA_S1_CD_VALID	IRQ_GPIO(GPIO_PCMCIA_S1_CD_VALID)
+#define PCMCIA_S0_RDYINT	IRQ_GPIO(GPIO_PCMCIA_S0_RDYINT)
+#define PCMCIA_S1_RDYINT	IRQ_GPIO(GPIO_PCMCIA_S1_RDYINT)
+
+
+static struct pcmcia_irqs irqs[] = {
+	{ 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" },
+	{ 1, PCMCIA_S1_CD_VALID, "PCMCIA1 CD" },
+};
+
+static int cmx255_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+	int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
+	if (ret)
+		return ret;
+	gpio_direction_output(GPIO_PCMCIA_RESET, 0);
+
+	skt->irq = skt->nr == 0 ? PCMCIA_S0_RDYINT : PCMCIA_S1_RDYINT;
+	ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+	if (!ret)
+		gpio_free(GPIO_PCMCIA_RESET);
+
+	return ret;
+}
+
+static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
+{
+	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
+	gpio_free(GPIO_PCMCIA_RESET);
+}
+
+
+static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+				       struct pcmcia_state *state)
+{
+	int cd = skt->nr ? GPIO_PCMCIA_S1_CD_VALID : GPIO_PCMCIA_S0_CD_VALID;
+	int rdy = skt->nr ? GPIO_PCMCIA_S0_RDYINT : GPIO_PCMCIA_S1_RDYINT;
+
+	state->detect = !gpio_get_value(cd);
+	state->ready  = !!gpio_get_value(rdy);
+	state->bvd1   = 1;
+	state->bvd2   = 1;
+	state->vs_3v  = 0;
+	state->vs_Xv  = 0;
+	state->wrprot = 0;  /* not available */
+}
+
+
+static int cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+					  const socket_state_t *state)
+{
+	switch (skt->nr) {
+	case 0:
+		if (state->flags & SS_RESET) {
+			gpio_set_value(GPIO_PCMCIA_SKTSEL, 0);
+			udelay(1);
+			gpio_set_value(GPIO_PCMCIA_RESET, 1);
+			udelay(10);
+			gpio_set_value(GPIO_PCMCIA_RESET, 0);
+		}
+		break;
+	case 1:
+		if (state->flags & SS_RESET) {
+			gpio_set_value(GPIO_PCMCIA_SKTSEL, 1);
+			udelay(1);
+			gpio_set_value(GPIO_PCMCIA_RESET, 1);
+			udelay(10);
+			gpio_set_value(GPIO_PCMCIA_RESET, 0);
+		}
+		break;
+	}
+
+	return 0;
+}
+
+static void cmx255_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+}
+
+static void cmx255_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+}
+
+
+static struct pcmcia_low_level cmx255_pcmcia_ops __initdata = {
+	.owner			= THIS_MODULE,
+	.hw_init		= cmx255_pcmcia_hw_init,
+	.hw_shutdown		= cmx255_pcmcia_shutdown,
+	.socket_state		= cmx255_pcmcia_socket_state,
+	.configure_socket	= cmx255_pcmcia_configure_socket,
+	.socket_init		= cmx255_pcmcia_socket_init,
+	.socket_suspend		= cmx255_pcmcia_socket_suspend,
+	.nr			= 1,
+};
+
+static struct platform_device *cmx255_pcmcia_device;
+
+int __init cmx255_pcmcia_init(void)
+{
+	int ret;
+
+	cmx255_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+
+	if (!cmx255_pcmcia_device)
+		return -ENOMEM;
+
+	ret = platform_device_add_data(cmx255_pcmcia_device, &cmx255_pcmcia_ops,
+				       sizeof(cmx255_pcmcia_ops));
+
+	if (ret == 0) {
+		printk(KERN_INFO "Registering cm-x255 PCMCIA interface.\n");
+		ret = platform_device_add(cmx255_pcmcia_device);
+	}
+
+	if (ret)
+		platform_device_put(cmx255_pcmcia_device);
+
+	return ret;
+}
+
+void __exit cmx255_pcmcia_exit(void)
+{
+	platform_device_unregister(cmx255_pcmcia_device);
+}