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/*
* linux/drivers/pcmcia/pxa2xx_palmtc.c
*
* Driver for Palm Tungsten|C PCMCIA
*
* Copyright (C) 2008 Alex Osborne <ato@meshy.org>
* Copyright (C) 2009-2011 Marek Vasut <marek.vasut@gmail.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/module.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <asm/mach-types.h>
#include <mach/palmtc.h>
#include "soc_common.h"
static struct gpio palmtc_pcmcia_gpios[] = {
{ GPIO_NR_PALMTC_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" },
{ GPIO_NR_PALMTC_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" },
{ GPIO_NR_PALMTC_PCMCIA_POWER3, GPIOF_INIT_LOW, "PCMCIA Power 3" },
{ GPIO_NR_PALMTC_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" },
{ GPIO_NR_PALMTC_PCMCIA_PWRREADY, GPIOF_IN, "PCMCIA Power Ready" },
};
static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
int ret;
ret = gpio_request_array(palmtc_pcmcia_gpios,
ARRAY_SIZE(palmtc_pcmcia_gpios));
skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTC_PCMCIA_READY;
skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
return ret;
}
static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
gpio_free_array(palmtc_pcmcia_gpios, ARRAY_SIZE(palmtc_pcmcia_gpios));
}
static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
struct pcmcia_state *state)
{
state->detect = 1; /* always inserted */
state->wrprot = 0;
state->vs_3v = 1;
state->vs_Xv = 0;
}
static int palmtc_wifi_powerdown(void)
{
gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0);
mdelay(40);
gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0);
return 0;
}
static int palmtc_wifi_powerup(void)
{
int timeout = 50;
gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1);
mdelay(50);
/* Power up the card, 1.8V first, after a while 3.3V */
gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1);
mdelay(100);
gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1);
/* Wait till the card is ready */
while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) &&
timeout) {
mdelay(1);
timeout--;
}
/* Power down the WiFi in case of error */
if (!timeout) {
palmtc_wifi_powerdown();
return 1;
}
/* Reset the card */
gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
mdelay(20);
gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0);
mdelay(25);
gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0);
return 0;
}
static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
const socket_state_t *state)
{
int ret = 1;
if (state->Vcc == 0)
ret = palmtc_wifi_powerdown();
else if (state->Vcc == 33)
ret = palmtc_wifi_powerup();
return ret;
}
static struct pcmcia_low_level palmtc_pcmcia_ops = {
.owner = THIS_MODULE,
.first = 0,
.nr = 1,
.hw_init = palmtc_pcmcia_hw_init,
.hw_shutdown = palmtc_pcmcia_hw_shutdown,
.socket_state = palmtc_pcmcia_socket_state,
.configure_socket = palmtc_pcmcia_configure_socket,
};
static struct platform_device *palmtc_pcmcia_device;
static int __init palmtc_pcmcia_init(void)
{
int ret;
if (!machine_is_palmtc())
return -ENODEV;
palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
if (!palmtc_pcmcia_device)
return -ENOMEM;
ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops,
sizeof(palmtc_pcmcia_ops));
if (!ret)
ret = platform_device_add(palmtc_pcmcia_device);
if (ret)
platform_device_put(palmtc_pcmcia_device);
return ret;
}
static void __exit palmtc_pcmcia_exit(void)
{
platform_device_unregister(palmtc_pcmcia_device);
}
module_init(palmtc_pcmcia_init);
module_exit(palmtc_pcmcia_exit);
MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
" Marek Vasut <marek.vasut@gmail.com>");
MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
MODULE_LICENSE("GPL");
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