pxa2xx_cm_x255.c
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/*
* 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 <linux/export.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)
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);
if (skt->nr == 0) {
skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S0_CD_VALID;
skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S0_RDYINT;
skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
} else {
skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S1_CD_VALID;
skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD";
skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S1_RDYINT;
skt->stat[SOC_STAT_RDY].name = "PCMCIA1 RDY";
}
return 0;
}
static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
{
gpio_free(GPIO_PCMCIA_RESET);
}
static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
state->vs_3v = 0;
state->vs_Xv = 0;
}
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 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,
.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);
}