[mirror_ubuntu-bionic-kernel.git] / drivers / pcmcia / pxa2xx_viper.c

/*
 * Viper/Zeus PCMCIA support
 *   Copyright 2004 Arcom Control Systems
 *
 * Maintained by Marc Zyngier <maz@misterjones.org>
 *
 * Based on:
 *   iPAQ h2200 PCMCIA support
 *   Copyright 2004 Koen Kooi <koen@vestingbar.nl>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive for
 * more details.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>

#include <pcmcia/ss.h>

#include <asm/irq.h>

#include <mach/arcom-pcmcia.h>

#include "soc_common.h"
#include "pxa2xx_base.h"

static struct platform_device *arcom_pcmcia_dev;

static inline struct arcom_pcmcia_pdata *viper_get_pdata(void)
{
	return arcom_pcmcia_dev->dev.platform_data;
}

static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
	struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
	unsigned long flags;

	skt->stat[SOC_STAT_CD].gpio = pdata->cd_gpio;
	skt->stat[SOC_STAT_CD].name = "PCMCIA_CD";
	skt->stat[SOC_STAT_RDY].gpio = pdata->rdy_gpio;
	skt->stat[SOC_STAT_RDY].name = "CF ready";

	if (gpio_request(pdata->pwr_gpio, "CF power"))
		goto err_request_pwr;

	local_irq_save(flags);

	if (gpio_direction_output(pdata->pwr_gpio, 0)) {
		local_irq_restore(flags);
		goto err_dir;
	}

	local_irq_restore(flags);

	return 0;

err_dir:
	gpio_free(pdata->pwr_gpio);
err_request_pwr:
	dev_err(&arcom_pcmcia_dev->dev, "Failed to setup PCMCIA GPIOs\n");
	return -1;
}

/*
 * Release all resources.
 */
static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
	struct arcom_pcmcia_pdata *pdata = viper_get_pdata();

	gpio_free(pdata->pwr_gpio);
}

static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
				      struct pcmcia_state *state)
{
	state->vs_3v  = 1; /* Can only apply 3.3V */
	state->vs_Xv  = 0;
}

static int viper_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
					 const socket_state_t *state)
{
	struct arcom_pcmcia_pdata *pdata = viper_get_pdata();

	/* Silently ignore Vpp, output enable, speaker enable. */
	pdata->reset(state->flags & SS_RESET);

	/* Apply socket voltage */
	switch (state->Vcc) {
	case 0:
		gpio_set_value(pdata->pwr_gpio, 0);
		break;
	case 33:
		gpio_set_value(pdata->pwr_gpio, 1);
		break;
	default:
		dev_err(&arcom_pcmcia_dev->dev, "Unsupported Vcc:%d\n", state->Vcc);
		return -1;
	}

	return 0;
}

static struct pcmcia_low_level viper_pcmcia_ops = {
	.owner          	= THIS_MODULE,
	.hw_init        	= viper_pcmcia_hw_init,
	.hw_shutdown		= viper_pcmcia_hw_shutdown,
	.socket_state		= viper_pcmcia_socket_state,
	.configure_socket	= viper_pcmcia_configure_socket,
	.nr         		= 1,
};

static struct platform_device *viper_pcmcia_device;

static int viper_pcmcia_probe(struct platform_device *pdev)
{
	int ret;

	/* I can't imagine more than one device, but you never know... */
	if (arcom_pcmcia_dev)
		return -EEXIST;

	if (!pdev->dev.platform_data)
		return -EINVAL;

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

	arcom_pcmcia_dev = pdev;

	viper_pcmcia_device->dev.parent = &pdev->dev;

	ret = platform_device_add_data(viper_pcmcia_device,
				       &viper_pcmcia_ops,
				       sizeof(viper_pcmcia_ops));

	if (!ret)
		ret = platform_device_add(viper_pcmcia_device);

	if (ret) {
		platform_device_put(viper_pcmcia_device);
		arcom_pcmcia_dev = NULL;
	}

	return ret;
}

static int viper_pcmcia_remove(struct platform_device *pdev)
{
	platform_device_unregister(viper_pcmcia_device);
	arcom_pcmcia_dev = NULL;
	return 0;
}

static struct platform_device_id viper_pcmcia_id_table[] = {
	{ .name = "viper-pcmcia", },
	{ .name = "zeus-pcmcia",  },
	{ },
};

static struct platform_driver viper_pcmcia_driver = {
	.probe		= viper_pcmcia_probe,
	.remove		= viper_pcmcia_remove,
	.driver		= {
		.name	= "arcom-pcmcia",
		.owner	= THIS_MODULE,
	},
	.id_table	= viper_pcmcia_id_table,
};

module_platform_driver(viper_pcmcia_driver);

MODULE_DEVICE_TABLE(platform, viper_pcmcia_id_table);
MODULE_LICENSE("GPL");
Commit	Line	Data
20f18ff3	1	/*
c2de1c38	2	* Viper/Zeus PCMCIA support
20f18ff3 MZ	3	* Copyright 2004 Arcom Control Systems
	4	*
	5	* Maintained by Marc Zyngier <maz@misterjones.org>
20f18ff3 MZ	6	*
	7	* Based on:
	8	* iPAQ h2200 PCMCIA support
	9	* Copyright 2004 Koen Kooi <koen@vestingbar.nl>
	10	*
	11	* This file is subject to the terms and conditions of the GNU General Public
	12	* License. See the file COPYING in the main directory of this archive for
	13	* more details.
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/init.h>
	18	#include <linux/kernel.h>
	19	#include <linux/errno.h>
	20	#include <linux/interrupt.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
c2de1c38	28	#include <mach/arcom-pcmcia.h>
20f18ff3 MZ	29
	30	#include "soc_common.h"
	31	#include "pxa2xx_base.h"
	32
c2de1c38 MZ	33	static struct platform_device *arcom_pcmcia_dev;
c2de1c38 MZ	34
c2de1c38 MZ	35	static inline struct arcom_pcmcia_pdata *viper_get_pdata(void)
	36	{
	37	return arcom_pcmcia_dev->dev.platform_data;
	38	}
	39
20f18ff3 MZ	40	static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
20f18ff3 MZ	41	{
c2de1c38	42	struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
20f18ff3 MZ	43	unsigned long flags;
20f18ff3 MZ	44
a9bb5a4b RK	45	skt->stat[SOC_STAT_CD].gpio = pdata->cd_gpio;
	46	skt->stat[SOC_STAT_CD].name = "PCMCIA_CD";
	47	skt->stat[SOC_STAT_RDY].gpio = pdata->rdy_gpio;
	48	skt->stat[SOC_STAT_RDY].name = "CF ready";
20f18ff3	49
c2de1c38	50	if (gpio_request(pdata->pwr_gpio, "CF power"))
20f18ff3 MZ	51	goto err_request_pwr;
	52
	53	local_irq_save(flags);
	54
a9bb5a4b	55	if (gpio_direction_output(pdata->pwr_gpio, 0)) {
20f18ff3 MZ	56	local_irq_restore(flags);
	57	goto err_dir;
	58	}
	59
	60	local_irq_restore(flags);
	61
a9bb5a4b	62	return 0;
20f18ff3 MZ	63
20f18ff3 MZ	64	err_dir:
c2de1c38	65	gpio_free(pdata->pwr_gpio);
20f18ff3	66	err_request_pwr:
c2de1c38	67	dev_err(&arcom_pcmcia_dev->dev, "Failed to setup PCMCIA GPIOs\n");
20f18ff3 MZ	68	return -1;
	69	}
	70
	71	/*
	72	* Release all resources.
	73	*/
	74	static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
	75	{
c2de1c38 MZ	76	struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
c2de1c38 MZ	77
c2de1c38	78	gpio_free(pdata->pwr_gpio);
20f18ff3 MZ	79	}
	80
	81	static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
	82	struct pcmcia_state *state)
	83	{
20f18ff3 MZ	84	state->vs_3v = 1; /* Can only apply 3.3V */
	85	state->vs_Xv = 0;
	86	}
	87
	88	static int viper_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
	89	const socket_state_t *state)
	90	{
c2de1c38 MZ	91	struct arcom_pcmcia_pdata *pdata = viper_get_pdata();
c2de1c38 MZ	92
20f18ff3	93	/* Silently ignore Vpp, output enable, speaker enable. */
c2de1c38	94	pdata->reset(state->flags & SS_RESET);
20f18ff3 MZ	95
	96	/* Apply socket voltage */
	97	switch (state->Vcc) {
	98	case 0:
c2de1c38	99	gpio_set_value(pdata->pwr_gpio, 0);
20f18ff3 MZ	100	break;
20f18ff3 MZ	101	case 33:
c2de1c38	102	gpio_set_value(pdata->pwr_gpio, 1);
20f18ff3 MZ	103	break;
20f18ff3 MZ	104	default:
c2de1c38	105	dev_err(&arcom_pcmcia_dev->dev, "Unsupported Vcc:%d\n", state->Vcc);
20f18ff3 MZ	106	return -1;
	107	}
	108
	109	return 0;
	110	}
	111
c2de1c38	112	static struct pcmcia_low_level viper_pcmcia_ops = {
20f18ff3 MZ	113	.owner = THIS_MODULE,
	114	.hw_init = viper_pcmcia_hw_init,
	115	.hw_shutdown = viper_pcmcia_hw_shutdown,
	116	.socket_state = viper_pcmcia_socket_state,
	117	.configure_socket = viper_pcmcia_configure_socket,
20f18ff3 MZ	118	.nr = 1,
	119	};
	120
	121	static struct platform_device *viper_pcmcia_device;
	122
c2de1c38	123	static int viper_pcmcia_probe(struct platform_device *pdev)
20f18ff3 MZ	124	{
	125	int ret;
	126
c2de1c38 MZ	127	/* I can't imagine more than one device, but you never know... */
	128	if (arcom_pcmcia_dev)
	129	return -EEXIST;
	130
	131	if (!pdev->dev.platform_data)
	132	return -EINVAL;
20f18ff3 MZ	133
	134	viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
	135	if (!viper_pcmcia_device)
	136	return -ENOMEM;
	137
c2de1c38 MZ	138	arcom_pcmcia_dev = pdev;
	139
	140	viper_pcmcia_device->dev.parent = &pdev->dev;
	141
20f18ff3 MZ	142	ret = platform_device_add_data(viper_pcmcia_device,
	143	&viper_pcmcia_ops,
	144	sizeof(viper_pcmcia_ops));
	145
	146	if (!ret)
	147	ret = platform_device_add(viper_pcmcia_device);
	148
c2de1c38	149	if (ret) {
20f18ff3	150	platform_device_put(viper_pcmcia_device);
c2de1c38 MZ	151	arcom_pcmcia_dev = NULL;
c2de1c38 MZ	152	}
20f18ff3 MZ	153
	154	return ret;
	155	}
	156
c2de1c38	157	static int viper_pcmcia_remove(struct platform_device *pdev)
20f18ff3 MZ	158	{
20f18ff3 MZ	159	platform_device_unregister(viper_pcmcia_device);
c2de1c38 MZ	160	arcom_pcmcia_dev = NULL;
	161	return 0;
	162	}
	163
	164	static struct platform_device_id viper_pcmcia_id_table[] = {
	165	{ .name = "viper-pcmcia", },
	166	{ .name = "zeus-pcmcia", },
	167	{ },
	168	};
	169
	170	static struct platform_driver viper_pcmcia_driver = {
	171	.probe = viper_pcmcia_probe,
	172	.remove = viper_pcmcia_remove,
	173	.driver = {
	174	.name = "arcom-pcmcia",
	175	.owner = THIS_MODULE,
	176	},
	177	.id_table = viper_pcmcia_id_table,
	178	};
	179
5d95f8e2	180	module_platform_driver(viper_pcmcia_driver);
20f18ff3	181
c2de1c38	182	MODULE_DEVICE_TABLE(platform, viper_pcmcia_id_table);
20f18ff3	183	MODULE_LICENSE("GPL");