[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / pcmcia / pxa2xx_palmtc.c

/*
 * 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_READY,	GPIOF_IN,	"PCMCIA Ready" },
	{ 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->socket.pci_irq = gpio_to_irq(GPIO_NR_PALMTC_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->ready  = !!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_READY);
	state->bvd1   = 1;
	state->bvd2   = 1;
	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");
Commit	Line	Data
36d618be MV	1	/*
	2	* linux/drivers/pcmcia/pxa2xx_palmtc.c
	3	*
	4	* Driver for Palm Tungsten\|C PCMCIA
	5	*
	6	* Copyright (C) 2008 Alex Osborne <ato@meshy.org>
9ed3fbf1	7	* Copyright (C) 2009-2011 Marek Vasut <marek.vasut@gmail.com>
36d618be MV	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License version 2 as
	11	* published by the Free Software Foundation.
	12	*
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/gpio.h>
	18	#include <linux/delay.h>
	19
	20	#include <asm/mach-types.h>
	21	#include <mach/palmtc.h>
	22	#include "soc_common.h"
	23
ba388307 MV	24	static struct gpio palmtc_pcmcia_gpios[] = {
	25	{ GPIO_NR_PALMTC_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" },
	26	{ GPIO_NR_PALMTC_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" },
	27	{ GPIO_NR_PALMTC_PCMCIA_POWER3, GPIOF_INIT_LOW, "PCMCIA Power 3" },
	28	{ GPIO_NR_PALMTC_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" },
	29	{ GPIO_NR_PALMTC_PCMCIA_READY, GPIOF_IN, "PCMCIA Ready" },
	30	{ GPIO_NR_PALMTC_PCMCIA_PWRREADY, GPIOF_IN, "PCMCIA Power Ready" },
	31	};
	32
36d618be MV	33	static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
	34	{
	35	int ret;
	36
ba388307 MV	37	ret = gpio_request_array(palmtc_pcmcia_gpios,
ba388307 MV	38	ARRAY_SIZE(palmtc_pcmcia_gpios));
36d618be	39
34641de2	40	skt->socket.pci_irq = gpio_to_irq(GPIO_NR_PALMTC_PCMCIA_READY);
36d618be	41
36d618be MV	42	return ret;
	43	}
	44
	45	static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
	46	{
ba388307	47	gpio_free_array(palmtc_pcmcia_gpios, ARRAY_SIZE(palmtc_pcmcia_gpios));
36d618be MV	48	}
	49
	50	static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
	51	struct pcmcia_state *state)
	52	{
	53	state->detect = 1; /* always inserted */
	54	state->ready = !!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_READY);
	55	state->bvd1 = 1;
	56	state->bvd2 = 1;
	57	state->wrprot = 0;
	58	state->vs_3v = 1;
	59	state->vs_Xv = 0;
	60	}
	61
	62	static int palmtc_wifi_powerdown(void)
	63	{
	64	gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
	65	gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0);
	66	mdelay(40);
	67	gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0);
	68	return 0;
	69	}
	70
	71	static int palmtc_wifi_powerup(void)
	72	{
	73	int timeout = 50;
	74
	75	gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1);
	76	mdelay(50);
	77
	78	/* Power up the card, 1.8V first, after a while 3.3V */
	79	gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1);
	80	mdelay(100);
	81	gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1);
	82
	83	/* Wait till the card is ready */
	84	while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) &&
	85	timeout) {
	86	mdelay(1);
	87	timeout--;
	88	}
	89
	90	/* Power down the WiFi in case of error */
	91	if (!timeout) {
	92	palmtc_wifi_powerdown();
	93	return 1;
	94	}
	95
	96	/* Reset the card */
	97	gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1);
	98	mdelay(20);
	99	gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0);
	100	mdelay(25);
	101
	102	gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0);
	103
	104	return 0;
	105	}
	106
	107	static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
	108	const socket_state_t *state)
	109	{
6cf4442f	110	int ret = 1;
36d618be MV	111
	112	if (state->Vcc == 0)
	113	ret = palmtc_wifi_powerdown();
	114	else if (state->Vcc == 33)
	115	ret = palmtc_wifi_powerup();
	116
	117	return ret;
	118	}
	119
36d618be MV	120	static struct pcmcia_low_level palmtc_pcmcia_ops = {
	121	.owner = THIS_MODULE,
	122
	123	.first = 0,
	124	.nr = 1,
	125
	126	.hw_init = palmtc_pcmcia_hw_init,
	127	.hw_shutdown = palmtc_pcmcia_hw_shutdown,
	128
	129	.socket_state = palmtc_pcmcia_socket_state,
	130	.configure_socket = palmtc_pcmcia_configure_socket,
36d618be MV	131	};
	132
	133	static struct platform_device *palmtc_pcmcia_device;
	134
	135	static int __init palmtc_pcmcia_init(void)
	136	{
	137	int ret;
	138
	139	if (!machine_is_palmtc())
	140	return -ENODEV;
	141
	142	palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
	143	if (!palmtc_pcmcia_device)
	144	return -ENOMEM;
	145
	146	ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops,
	147	sizeof(palmtc_pcmcia_ops));
	148
	149	if (!ret)
	150	ret = platform_device_add(palmtc_pcmcia_device);
	151
	152	if (ret)
	153	platform_device_put(palmtc_pcmcia_device);
	154
	155	return ret;
	156	}
	157
	158	static void __exit palmtc_pcmcia_exit(void)
	159	{
	160	platform_device_unregister(palmtc_pcmcia_device);
	161	}
	162
	163	module_init(palmtc_pcmcia_init);
	164	module_exit(palmtc_pcmcia_exit);
	165
	166	MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
	167	" Marek Vasut <marek.vasut@gmail.com>");
	168	MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten\|C");
	169	MODULE_ALIAS("platform:pxa2xx-pcmcia");
	170	MODULE_LICENSE("GPL");