163 строки
3.8 KiB
C
163 строки
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* 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>
|
|
*/
|
|
|
|
#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->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");
|