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/*
* 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/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");
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