[mirror_ubuntu-artful-kernel.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 pcmcia_irqs irqs[] = {
	{ 0, IRQ_GPIO(SG2_S0_GPIO_DETECT), "PCMCIA0 CD" },
};

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->socket.pci_irq = IRQ_GPIO(SG2_S0_GPIO_READY);
	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
}

static void sg2_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
}

static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
				    struct pcmcia_state *state)
{
	state->detect = !gpio_get_value(SG2_S0_GPIO_DETECT);
	state->ready  = !!gpio_get_value(SG2_S0_GPIO_READY);
	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 */
	state->wrprot = 0; /* not available - write protect */
}

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 void sg2_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
}

static void sg2_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
}

static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
	.owner			= THIS_MODULE,
	.hw_init		= sg2_pcmcia_hw_init,
	.hw_shutdown		= sg2_pcmcia_hw_shutdown,
	.socket_state		= sg2_pcmcia_socket_state,
	.configure_socket	= sg2_pcmcia_configure_socket,
	.socket_init		= sg2_pcmcia_socket_init,
	.socket_suspend		= sg2_pcmcia_socket_suspend,
	.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
	36	static struct pcmcia_irqs irqs[] = {
	37	{ 0, IRQ_GPIO(SG2_S0_GPIO_DETECT), "PCMCIA0 CD" },
	38	};
	39
5be56a62 JC	40	static struct gpio sg2_pcmcia_gpios[] = {
	41	{ SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" },
	42	{ SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" },
	43	};
	44
5aeb1a5e JC	45	static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
5aeb1a5e JC	46	{
00293972	47	skt->socket.pci_irq = IRQ_GPIO(SG2_S0_GPIO_READY);
5aeb1a5e JC	48	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
	49	}
	50
	51	static void sg2_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
	52	{
	53	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
	54	}
	55
	56	static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
	57	struct pcmcia_state *state)
	58	{
	59	state->detect = !gpio_get_value(SG2_S0_GPIO_DETECT);
	60	state->ready = !!gpio_get_value(SG2_S0_GPIO_READY);
	61	state->bvd1 = 0; /* not available - battery detect on card */
	62	state->bvd2 = 0; /* not available */
	63	state->vs_3v = 1; /* not available - voltage detect for card */
	64	state->vs_Xv = 0; /* not available */
	65	state->wrprot = 0; /* not available - write protect */
	66	}
	67
	68	static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
	69	const socket_state_t *state)
	70	{
	71	/* Enable card power */
	72	switch (state->Vcc) {
	73	case 0:
	74	/* sets power ctl register high */
	75	gpio_set_value(SG2_S0_POWER_CTL, 1);
	76	break;
	77	case 33:
	78	case 50:
	79	/* sets power control register low (clear) */
	80	gpio_set_value(SG2_S0_POWER_CTL, 0);
	81	msleep(100);
	82	break;
	83	default:
	84	pr_err("%s(): bad Vcc %u\n",
	85	__func__, state->Vcc);
	86	return -1;
	87	}
	88
	89	/* reset */
	90	gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET));
	91
	92	return 0;
	93	}
	94
	95	static void sg2_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
	96	{
	97	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
	98	}
	99
	100	static void sg2_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
	101	{
	102	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
	103	}
	104
	105	static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
	106	.owner = THIS_MODULE,
	107	.hw_init = sg2_pcmcia_hw_init,
	108	.hw_shutdown = sg2_pcmcia_hw_shutdown,
	109	.socket_state = sg2_pcmcia_socket_state,
	110	.configure_socket = sg2_pcmcia_configure_socket,
	111	.socket_init = sg2_pcmcia_socket_init,
112	.socket_suspend = sg2_pcmcia_socket_suspend,
113	.nr = 1,
114	};
115
116	static struct platform_device *sg2_pcmcia_device;
117
118	static int __init sg2_pcmcia_init(void)
119	{
120	int ret;
121
122	if (!machine_is_stargate2())
123	return -ENODEV;
124
125	sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
126	if (!sg2_pcmcia_device)
127	return -ENOMEM;
128
5be56a62	129	ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
5aeb1a5e JC	130	if (ret)
5aeb1a5e JC	131	goto error_put_platform_device;
5aeb1a5e JC	132
	133	ret = platform_device_add_data(sg2_pcmcia_device,
	134	&sg2_pcmcia_ops,
	135	sizeof(sg2_pcmcia_ops));
	136	if (ret)
5be56a62	137	goto error_free_gpios;
5aeb1a5e JC	138
	139	ret = platform_device_add(sg2_pcmcia_device);
	140	if (ret)
5be56a62	141	goto error_free_gpios;
5aeb1a5e JC	142
5aeb1a5e JC	143	return 0;
5be56a62 JC	144	error_free_gpios:
5be56a62 JC	145	gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
5aeb1a5e JC	146	error_put_platform_device:
	147	platform_device_put(sg2_pcmcia_device);
	148
	149	return ret;
	150	}
	151
	152	static void __exit sg2_pcmcia_exit(void)
	153	{
	154	platform_device_unregister(sg2_pcmcia_device);
5be56a62	155	gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
5aeb1a5e JC	156	}
	157
	158	fs_initcall(sg2_pcmcia_init);
	159	module_exit(sg2_pcmcia_exit);
	160
	161	MODULE_LICENSE("GPL");
	162	MODULE_ALIAS("platform:pxa2xx-pcmcia");