[ARM] 4578/1: CM-x270: PCMCIA support

This patch provides support for PCMCIA on CM-X270

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

1 files changed, 175 insertions, 0 deletions

diff --git a/drivers/pcmcia/pxa2xx_cm_x270.c b/drivers/pcmcia/pxa2xx_cm_x270.c
new file mode 100644
index 00000000000..fbf2f3a6984
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_cm_x270.c
@@ -0,0 +1,175 @@
+/*
+ * linux/drivers/pcmcia/pxa/pxa_cm_x270.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
+ * Mike Rapoport <mike@compulab.co.il>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <linux/delay.h>
+
+#include <pcmcia/ss.h>
+#include <asm/hardware.h>
+
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/cm-x270.h>
+
+#include "soc_common.h"
+
+static struct pcmcia_irqs irqs[] = {
+	{ 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" },
+	{ 1, PCMCIA_S1_CD_VALID, "PCMCIA1 CD" },
+};
+
+static int cmx270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+	GPSR(GPIO48_nPOE) = GPIO_bit(GPIO48_nPOE) |
+		GPIO_bit(GPIO49_nPWE) |
+		GPIO_bit(GPIO50_nPIOR) |
+		GPIO_bit(GPIO51_nPIOW) |
+		GPIO_bit(GPIO85_nPCE_1) |
+		GPIO_bit(GPIO54_nPCE_2);
+
+	pxa_gpio_mode(GPIO48_nPOE_MD);
+	pxa_gpio_mode(GPIO49_nPWE_MD);
+	pxa_gpio_mode(GPIO50_nPIOR_MD);
+	pxa_gpio_mode(GPIO51_nPIOW_MD);
+	pxa_gpio_mode(GPIO85_nPCE_1_MD);
+	pxa_gpio_mode(GPIO54_nPCE_2_MD);
+	pxa_gpio_mode(GPIO55_nPREG_MD);
+	pxa_gpio_mode(GPIO56_nPWAIT_MD);
+	pxa_gpio_mode(GPIO57_nIOIS16_MD);
+
+	/* Reset signal */
+	pxa_gpio_mode(GPIO53_nPCE_2 | GPIO_OUT);
+	GPCR(GPIO53_nPCE_2) = GPIO_bit(GPIO53_nPCE_2);
+
+	set_irq_type(PCMCIA_S0_CD_VALID, IRQ_TYPE_EDGE_BOTH);
+	set_irq_type(PCMCIA_S1_CD_VALID, IRQ_TYPE_EDGE_BOTH);
+
+	/* irq's for slots: */
+	set_irq_type(PCMCIA_S0_RDYINT, IRQ_TYPE_EDGE_FALLING);
+	set_irq_type(PCMCIA_S1_RDYINT, IRQ_TYPE_EDGE_FALLING);
+
+	skt->irq = (skt->nr == 0) ? PCMCIA_S0_RDYINT : PCMCIA_S1_RDYINT;
+	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static void cmx270_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
+{
+	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
+
+	set_irq_type(IRQ_TO_GPIO(PCMCIA_S0_CD_VALID), IRQ_TYPE_NONE);
+	set_irq_type(IRQ_TO_GPIO(PCMCIA_S1_CD_VALID), IRQ_TYPE_NONE);
+
+	set_irq_type(IRQ_TO_GPIO(PCMCIA_S0_RDYINT), IRQ_TYPE_NONE);
+	set_irq_type(IRQ_TO_GPIO(PCMCIA_S1_RDYINT), IRQ_TYPE_NONE);
+}
+
+
+static void cmx270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+				       struct pcmcia_state *state)
+{
+	state->detect = (PCC_DETECT(skt->nr) == 0) ? 1 : 0;
+	state->ready  = (PCC_READY(skt->nr) == 0) ? 0 : 1;
+	state->bvd1   = 1;
+	state->bvd2   = 1;
+	state->vs_3v  = 0;
+	state->vs_Xv  = 0;
+	state->wrprot = 0;  /* not available */
+}
+
+
+static int cmx270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+					  const socket_state_t *state)
+{
+	GPSR(GPIO49_nPWE) = GPIO_bit(GPIO49_nPWE);
+	pxa_gpio_mode(GPIO49_nPWE | GPIO_OUT);
+
+	switch (skt->nr) {
+	case 0:
+		if (state->flags & SS_RESET) {
+			GPCR(GPIO49_nPWE) = GPIO_bit(GPIO49_nPWE);
+			GPSR(GPIO53_nPCE_2) = GPIO_bit(GPIO53_nPCE_2);
+			udelay(10);
+			GPCR(GPIO53_nPCE_2) = GPIO_bit(GPIO53_nPCE_2);
+			GPSR(GPIO49_nPWE) = GPIO_bit(GPIO49_nPWE);
+		}
+		break;
+	case 1:
+		if (state->flags & SS_RESET) {
+			GPCR(GPIO49_nPWE) = GPIO_bit(GPIO49_nPWE);
+			GPSR(GPIO53_nPCE_2) = GPIO_bit(GPIO53_nPCE_2);
+			udelay(10);
+			GPCR(GPIO53_nPCE_2) = GPIO_bit(GPIO53_nPCE_2);
+			GPSR(GPIO49_nPWE) = GPIO_bit(GPIO49_nPWE);
+		}
+		break;
+	}
+
+	pxa_gpio_mode(GPIO49_nPWE_MD);
+
+	return 0;
+}
+
+static void cmx270_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+}
+
+static void cmx270_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+}
+
+
+static struct pcmcia_low_level cmx270_pcmcia_ops = {
+	.owner			= THIS_MODULE,
+	.hw_init		= cmx270_pcmcia_hw_init,
+	.hw_shutdown		= cmx270_pcmcia_shutdown,
+	.socket_state		= cmx270_pcmcia_socket_state,
+	.configure_socket	= cmx270_pcmcia_configure_socket,
+	.socket_init		= cmx270_pcmcia_socket_init,
+	.socket_suspend		= cmx270_pcmcia_socket_suspend,
+	.nr			= 2,
+};
+
+static struct platform_device *cmx270_pcmcia_device;
+
+static int __init cmx270_pcmcia_init(void)
+{
+	int ret;
+
+	cmx270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+
+	if (!cmx270_pcmcia_device)
+		return -ENOMEM;
+
+	cmx270_pcmcia_device->dev.platform_data = &cmx270_pcmcia_ops;
+
+	printk(KERN_INFO "Registering cm-x270 PCMCIA interface.\n");
+	ret = platform_device_add(cmx270_pcmcia_device);
+
+	if (ret)
+		platform_device_put(cmx270_pcmcia_device);
+
+	return ret;
+}
+
+static void __exit cmx270_pcmcia_exit(void)
+{
+	platform_device_unregister(cmx270_pcmcia_device);
+}
+
+module_init(cmx270_pcmcia_init);
+module_exit(cmx270_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
+MODULE_DESCRIPTION("CM-x270 PCMCIA driver");