[linux-block.git] / drivers / pcmcia / pxa2xx_stargate2.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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
 */

#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
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
5aeb1a5e JC	2	/*
	3	* linux/drivers/pcmcia/pxa2xx_stargate2.c
	4	*
	5	* Stargate 2 PCMCIA specific routines.
	6	*
	7	* Created: December 6, 2005
	8	* Author: Ed C. Epp
	9	* Copyright: Intel Corp 2005
	10	* Jonathan Cameron <jic23@cam.ac.uk> 2009
5aeb1a5e JC	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/init.h>
	15	#include <linux/kernel.h>
	16	#include <linux/interrupt.h>
	17	#include <linux/delay.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/gpio.h>
	20
	21	#include <pcmcia/ss.h>
	22
	23	#include <asm/irq.h>
	24	#include <asm/mach-types.h>
	25
	26	#include "soc_common.h"
	27
5aeb1a5e JC	28	#define SG2_S0_POWER_CTL 108
	29	#define SG2_S0_GPIO_RESET 82
	30	#define SG2_S0_GPIO_DETECT 53
	31	#define SG2_S0_GPIO_READY 81
	32
5be56a62 JC	33	static struct gpio sg2_pcmcia_gpios[] = {
	34	{ SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" },
	35	{ SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" },
	36	};
	37
5aeb1a5e JC	38	static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
5aeb1a5e JC	39	{
a9bb5a4b RK	40	skt->stat[SOC_STAT_CD].gpio = SG2_S0_GPIO_DETECT;
	41	skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
	42	skt->stat[SOC_STAT_RDY].gpio = SG2_S0_GPIO_READY;
	43	skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
	44	return 0;
5aeb1a5e JC	45	}
	46
	47	static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
	48	struct pcmcia_state *state)
	49	{
5aeb1a5e JC	50	state->bvd1 = 0; /* not available - battery detect on card */
	51	state->bvd2 = 0; /* not available */
	52	state->vs_3v = 1; /* not available - voltage detect for card */
	53	state->vs_Xv = 0; /* not available */
5aeb1a5e JC	54	}
	55
	56	static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
	57	const socket_state_t *state)
	58	{
	59	/* Enable card power */
	60	switch (state->Vcc) {
	61	case 0:
	62	/* sets power ctl register high */
	63	gpio_set_value(SG2_S0_POWER_CTL, 1);
	64	break;
	65	case 33:
	66	case 50:
	67	/* sets power control register low (clear) */
	68	gpio_set_value(SG2_S0_POWER_CTL, 0);
	69	msleep(100);
	70	break;
	71	default:
	72	pr_err("%s(): bad Vcc %u\n",
	73	__func__, state->Vcc);
	74	return -1;
	75	}
	76
	77	/* reset */
	78	gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET));
	79
	80	return 0;
	81	}
	82
5aeb1a5e JC	83	static struct pcmcia_low_level sg2_pcmcia_ops __initdata = {
	84	.owner = THIS_MODULE,
	85	.hw_init = sg2_pcmcia_hw_init,
5aeb1a5e JC	86	.socket_state = sg2_pcmcia_socket_state,
5aeb1a5e JC	87	.configure_socket = sg2_pcmcia_configure_socket,
5aeb1a5e JC	88	.nr = 1,
	89	};
	90
	91	static struct platform_device *sg2_pcmcia_device;
	92
	93	static int __init sg2_pcmcia_init(void)
	94	{
	95	int ret;
	96
	97	if (!machine_is_stargate2())
	98	return -ENODEV;
	99
	100	sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
	101	if (!sg2_pcmcia_device)
	102	return -ENOMEM;
	103
5be56a62	104	ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
5aeb1a5e JC	105	if (ret)
5aeb1a5e JC	106	goto error_put_platform_device;
5aeb1a5e JC	107
	108	ret = platform_device_add_data(sg2_pcmcia_device,
	109	&sg2_pcmcia_ops,
	110	sizeof(sg2_pcmcia_ops));
	111	if (ret)
5be56a62	112	goto error_free_gpios;
5aeb1a5e JC	113
	114	ret = platform_device_add(sg2_pcmcia_device);
	115	if (ret)
5be56a62	116	goto error_free_gpios;
5aeb1a5e JC	117
5aeb1a5e JC	118	return 0;
5be56a62 JC	119	error_free_gpios:
5be56a62 JC	120	gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
5aeb1a5e JC	121	error_put_platform_device:
	122	platform_device_put(sg2_pcmcia_device);
	123
	124	return ret;
	125	}
	126
	127	static void __exit sg2_pcmcia_exit(void)
	128	{
	129	platform_device_unregister(sg2_pcmcia_device);
5be56a62	130	gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios));
5aeb1a5e JC	131	}
	132
	133	fs_initcall(sg2_pcmcia_init);
	134	module_exit(sg2_pcmcia_exit);
	135
	136	MODULE_LICENSE("GPL");
	137	MODULE_ALIAS("platform:pxa2xx-pcmcia");