[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / pcmcia / pxa2xx_stargate2.c

/*
 * linux/drivers/pcmcia/pxa2xx_stargate2.c
 *
 * Stargate 2 PCMCIA specific routines.
 *
 * Created:	December 6, 2005
 * Author:	Ed C. Epp
 * Copyright:	Intel Corp 2005
 *              Jonathan Cameron <jic23@cam.ac.uk> 2009
 *
 * 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/init.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>

#include <pcmcia/ss.h>

#include <asm/irq.h>
#include <asm/mach-types.h>

#include "soc_common.h"

#define SG2_S0_POWER_CTL	108
#define SG2_S0_GPIO_RESET	82
#define SG2_S0_GPIO_DETECT	53
#define SG2_S0_GPIO_READY	81

static struct gpio sg2_pcmcia_gpios[] = {
	{ SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" },
	{ SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" },
};

static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
	skt->stat[SOC_STAT_CD].gpio = SG2_S0_GPIO_DETECT;
	skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
	skt->stat[SOC_STAT_RDY].gpio = SG2_S0_GPIO_READY;
	skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
	return 0;
}

static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
				    struct pcmcia_state *state)
{
	state->bvd1   = 0; /* not available - battery detect on card */
	state->bvd2   = 0; /* not available */
	state->vs_3v  = 1; /* not available - voltage detect for card */
	state->vs_Xv  = 0; /* not available */
}

static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
				       const socket_state_t *state)
{
	/* Enable card power */
	switch (state->Vcc) {
	case 0:
		/* sets power ctl register high */
		gpio_set_value(SG2_S0_POWER_CTL, 1);
		break;
	case 33:
	case 50:
		/* sets power control register low (clear) */
		gpio_set_value(SG2_S0_POWER_CTL, 0);
		msleep(100);
		break;
	default:
		pr_err("%s(): bad Vcc %u\n",
		       __func__, state->Vcc);
		return -1;
	}

	/* reset */
	gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET));

	return 0;
}

static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
	.owner			= THIS_MODULE,
	.hw_init		= sg2_pcmcia_hw_init,
	.socket_state		= sg2_pcmcia_socket_state,
	.configure_socket	= sg2_pcmcia_configure_socket,
	.nr			= 1,
};

static struct platform_device *sg2_pcmcia_device;

static int __init sg2_pcmcia_init(void)
{
	int ret;

	if (!machine_is_stargate2())
		return -ENODEV;

	sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
	if (!sg2_pcmcia_device)
		return -ENOMEM;

	ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
	if (ret)
		goto error_put_platform_device;

	ret = platform_device_add_data(sg2_pcmcia_device,
				       &sg2_pcmcia_ops,
				       sizeof(sg2_pcmcia_ops));
	if (ret)
		goto error_free_gpios;

	ret = platform_device_add(sg2_pcmcia_device);
	if (ret)
		goto error_free_gpios;

	return 0;
error_free_gpios:
	gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
error_put_platform_device:
	platform_device_put(sg2_pcmcia_device);

	return ret;
}

static void __exit sg2_pcmcia_exit(void)
{
	platform_device_unregister(sg2_pcmcia_device);
	gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
}

fs_initcall(sg2_pcmcia_init);
module_exit(sg2_pcmcia_exit);

MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pxa2xx-pcmcia");
Commit	Line	Data
5aeb1a5e JC	1	/*
	2	* linux/drivers/pcmcia/pxa2xx_stargate2.c
	3	*
	4	* Stargate 2 PCMCIA specific routines.
	5	*
	6	* Created: December 6, 2005
	7	* Author: Ed C. Epp
	8	* Copyright: Intel Corp 2005
	9	* Jonathan Cameron <jic23@cam.ac.uk> 2009
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License version 2 as
	13	* published by the Free Software Foundation.
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/init.h>
	18	#include <linux/kernel.h>
	19	#include <linux/interrupt.h>
	20	#include <linux/delay.h>
	21	#include <linux/platform_device.h>
	22	#include <linux/gpio.h>
	23
	24	#include <pcmcia/ss.h>
	25
	26	#include <asm/irq.h>
	27	#include <asm/mach-types.h>
	28
	29	#include "soc_common.h"
	30
5aeb1a5e JC	31	#define SG2_S0_POWER_CTL 108
	32	#define SG2_S0_GPIO_RESET 82
	33	#define SG2_S0_GPIO_DETECT 53
	34	#define SG2_S0_GPIO_READY 81
	35
5be56a62 JC	36	static struct gpio sg2_pcmcia_gpios[] = {
	37	{ SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" },
	38	{ SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" },
	39	};
	40
5aeb1a5e JC	41	static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
5aeb1a5e JC	42	{
a9bb5a4b RK	43	skt->stat[SOC_STAT_CD].gpio = SG2_S0_GPIO_DETECT;
	44	skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
	45	skt->stat[SOC_STAT_RDY].gpio = SG2_S0_GPIO_READY;
	46	skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
	47	return 0;
5aeb1a5e JC	48	}
	49
	50	static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
	51	struct pcmcia_state *state)
	52	{
5aeb1a5e JC	53	state->bvd1 = 0; /* not available - battery detect on card */
	54	state->bvd2 = 0; /* not available */
	55	state->vs_3v = 1; /* not available - voltage detect for card */
	56	state->vs_Xv = 0; /* not available */
5aeb1a5e JC	57	}
	58
	59	static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
	60	const socket_state_t *state)
	61	{
	62	/* Enable card power */
	63	switch (state->Vcc) {
	64	case 0:
	65	/* sets power ctl register high */
	66	gpio_set_value(SG2_S0_POWER_CTL, 1);
	67	break;
	68	case 33:
	69	case 50:
	70	/* sets power control register low (clear) */
	71	gpio_set_value(SG2_S0_POWER_CTL, 0);
	72	msleep(100);
	73	break;
	74	default:
	75	pr_err("%s(): bad Vcc %u\n",
	76	__func__, state->Vcc);
	77	return -1;
	78	}
	79
	80	/* reset */
	81	gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET));
	82
	83	return 0;
	84	}
	85
5aeb1a5e JC	86	static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
	87	.owner = THIS_MODULE,
	88	.hw_init = sg2_pcmcia_hw_init,
5aeb1a5e JC	89	.socket_state = sg2_pcmcia_socket_state,
5aeb1a5e JC	90	.configure_socket = sg2_pcmcia_configure_socket,
5aeb1a5e JC	91	.nr = 1,
	92	};
	93
	94	static struct platform_device *sg2_pcmcia_device;
	95
	96	static int __init sg2_pcmcia_init(void)
	97	{
	98	int ret;
	99
	100	if (!machine_is_stargate2())
	101	return -ENODEV;
	102
	103	sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
	104	if (!sg2_pcmcia_device)
	105	return -ENOMEM;
	106
5be56a62	107	ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
5aeb1a5e JC	108	if (ret)
5aeb1a5e JC	109	goto error_put_platform_device;
5aeb1a5e JC	110
	111	ret = platform_device_add_data(sg2_pcmcia_device,
	112	&sg2_pcmcia_ops,
	113	sizeof(sg2_pcmcia_ops));
	114	if (ret)
5be56a62	115	goto error_free_gpios;
5aeb1a5e JC	116
	117	ret = platform_device_add(sg2_pcmcia_device);
	118	if (ret)
5be56a62	119	goto error_free_gpios;
5aeb1a5e JC	120
5aeb1a5e JC	121	return 0;
5be56a62 JC	122	error_free_gpios:
5be56a62 JC	123	gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
5aeb1a5e JC	124	error_put_platform_device:
	125	platform_device_put(sg2_pcmcia_device);
	126
	127	return ret;
	128	}
	129
	130	static void __exit sg2_pcmcia_exit(void)
	131	{
	132	platform_device_unregister(sg2_pcmcia_device);
5be56a62	133	gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
5aeb1a5e JC	134	}
	135
	136	fs_initcall(sg2_pcmcia_init);
	137	module_exit(sg2_pcmcia_exit);
	138
	139	MODULE_LICENSE("GPL");
	140	MODULE_ALIAS("platform:pxa2xx-pcmcia");