linux/drivers/pcmcia/pxa2xx_palmtc.c
Thomas Gleixner d2912cb15b treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
Based on 2 normalized pattern(s):

  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

  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 #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19 17:09:55 +02:00

163 lines
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");