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pxa2xx_palmtx.c
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pxa2xx_palmtx.c
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/*
* linux/drivers/pcmcia/pxa2xx_palmtx.c
*
* Driver for Palm T|X PCMCIA
*
* Copyright (C) 2007-2011 Marek Vasut <[email protected]>
*
* 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/module.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <asm/mach-types.h>
#include <mach/palmtx.h>
#include "soc_common.h"
static struct gpio palmtx_pcmcia_gpios[] = {
{ GPIO_NR_PALMTX_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" },
{ GPIO_NR_PALMTX_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" },
{ GPIO_NR_PALMTX_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" },
{ GPIO_NR_PALMTX_PCMCIA_READY, GPIOF_IN, "PCMCIA Ready" },
};
static int palmtx_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
int ret;
ret = gpio_request_array(palmtx_pcmcia_gpios,
ARRAY_SIZE(palmtx_pcmcia_gpios));
skt->socket.pci_irq = gpio_to_irq(GPIO_NR_PALMTX_PCMCIA_READY);
return ret;
}
static void palmtx_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
gpio_free_array(palmtx_pcmcia_gpios, ARRAY_SIZE(palmtx_pcmcia_gpios));
}
static void palmtx_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
state->detect = 1; /* always inserted */
state->ready = !!gpio_get_value(GPIO_NR_PALMTX_PCMCIA_READY);
state->bvd1 = 1;
state->bvd2 = 1;
state->wrprot = 0;
state->vs_3v = 1;
state->vs_Xv = 0;
}
static int
palmtx_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER1, 1);
gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER2, 1);
gpio_set_value(GPIO_NR_PALMTX_PCMCIA_RESET,
!!(state->flags & SS_RESET));
return 0;
}
static struct pcmcia_low_level palmtx_pcmcia_ops = {
.owner = THIS_MODULE,
.first = 0,
.nr = 1,
.hw_init = palmtx_pcmcia_hw_init,
.hw_shutdown = palmtx_pcmcia_hw_shutdown,
.socket_state = palmtx_pcmcia_socket_state,
.configure_socket = palmtx_pcmcia_configure_socket,
};
static struct platform_device *palmtx_pcmcia_device;
static int __init palmtx_pcmcia_init(void)
{
int ret;
if (!machine_is_palmtx())
return -ENODEV;
palmtx_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
if (!palmtx_pcmcia_device)
return -ENOMEM;
ret = platform_device_add_data(palmtx_pcmcia_device, &palmtx_pcmcia_ops,
sizeof(palmtx_pcmcia_ops));
if (!ret)
ret = platform_device_add(palmtx_pcmcia_device);
if (ret)
platform_device_put(palmtx_pcmcia_device);
return ret;
}
static void __exit palmtx_pcmcia_exit(void)
{
platform_device_unregister(palmtx_pcmcia_device);
}
module_init(palmtx_pcmcia_init);
module_exit(palmtx_pcmcia_exit);
MODULE_AUTHOR("Marek Vasut <[email protected]>");
MODULE_DESCRIPTION("PCMCIA support for Palm T|X");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
MODULE_LICENSE("GPL");