[linux.git] / drivers / pcmcia / at91_cf.c

/*
 * at91_cf.c -- AT91 CompactFlash controller driver
 *
 * Copyright (C) 2005 David Brownell
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/platform_data/atmel.h>
#include <linux/io.h>
#include <linux/sizes.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/atmel-mc.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/regmap.h>

#include <pcmcia/ss.h>

/*
 * A0..A10 work in each range; A23 indicates I/O space;  A25 is CFRNW;
 * some other bit in {A24,A22..A11} is nREG to flag memory access
 * (vs attributes).  So more than 2KB/region would just be waste.
 * Note: These are offsets from the physical base address.
 */
#define	CF_ATTR_PHYS	(0)
#define	CF_IO_PHYS	(1 << 23)
#define	CF_MEM_PHYS	(0x017ff800)

struct regmap *mc;

/*--------------------------------------------------------------------------*/

struct at91_cf_socket {
	struct pcmcia_socket	socket;

	unsigned		present:1;

	struct platform_device	*pdev;
	struct at91_cf_data	*board;

	unsigned long		phys_baseaddr;
};

static inline int at91_cf_present(struct at91_cf_socket *cf)
{
	return !gpio_get_value(cf->board->det_pin);
}

/*--------------------------------------------------------------------------*/

static int at91_cf_ss_init(struct pcmcia_socket *s)
{
	return 0;
}

static irqreturn_t at91_cf_irq(int irq, void *_cf)
{
	struct at91_cf_socket *cf = _cf;

	if (irq == gpio_to_irq(cf->board->det_pin)) {
		unsigned present = at91_cf_present(cf);

		/* kick pccard as needed */
		if (present != cf->present) {
			cf->present = present;
			dev_dbg(&cf->pdev->dev, "card %s\n",
					present ? "present" : "gone");
			pcmcia_parse_events(&cf->socket, SS_DETECT);
		}
	}

	return IRQ_HANDLED;
}

static int at91_cf_get_status(struct pcmcia_socket *s, u_int *sp)
{
	struct at91_cf_socket	*cf;

	if (!sp)
		return -EINVAL;

	cf = container_of(s, struct at91_cf_socket, socket);

	/* NOTE: CF is always 3VCARD */
	if (at91_cf_present(cf)) {
		int rdy	= gpio_is_valid(cf->board->irq_pin);	/* RDY/nIRQ */
		int vcc	= gpio_is_valid(cf->board->vcc_pin);

		*sp = SS_DETECT | SS_3VCARD;
		if (!rdy || gpio_get_value(cf->board->irq_pin))
			*sp |= SS_READY;
		if (!vcc || gpio_get_value(cf->board->vcc_pin))
			*sp |= SS_POWERON;
	} else
		*sp = 0;

	return 0;
}

static int
at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
{
	struct at91_cf_socket	*cf;

	cf = container_of(sock, struct at91_cf_socket, socket);

	/* switch Vcc if needed and possible */
	if (gpio_is_valid(cf->board->vcc_pin)) {
		switch (s->Vcc) {
		case 0:
			gpio_set_value(cf->board->vcc_pin, 0);
			break;
		case 33:
			gpio_set_value(cf->board->vcc_pin, 1);
			break;
		default:
			return -EINVAL;
		}
	}

	/* toggle reset if needed */
	gpio_set_value(cf->board->rst_pin, s->flags & SS_RESET);

	dev_dbg(&cf->pdev->dev, "Vcc %d, io_irq %d, flags %04x csc %04x\n",
				s->Vcc, s->io_irq, s->flags, s->csc_mask);

	return 0;
}

static int at91_cf_ss_suspend(struct pcmcia_socket *s)
{
	return at91_cf_set_socket(s, &dead_socket);
}

/* we already mapped the I/O region */
static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
{
	struct at91_cf_socket	*cf;
	u32			csr;

	cf = container_of(s, struct at91_cf_socket, socket);
	io->flags &= (MAP_ACTIVE | MAP_16BIT | MAP_AUTOSZ);

	/*
	 * Use 16 bit accesses unless/until we need 8-bit i/o space.
	 *
	 * NOTE: this CF controller ignores IOIS16, so we can't really do
	 * MAP_AUTOSZ.  The 16bit mode allows single byte access on either
	 * D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many
	 * purposes (and handles ide-cs).
	 *
	 * The 8bit mode is needed for odd byte access on D0-D7.  It seems
	 * some cards only like that way to get at the odd byte, despite
	 * CF 3.0 spec table 35 also giving the D8-D15 option.
	 */
	if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) {
		csr = AT91_MC_SMC_DBW_8;
		dev_dbg(&cf->pdev->dev, "8bit i/o bus\n");
	} else {
		csr = AT91_MC_SMC_DBW_16;
		dev_dbg(&cf->pdev->dev, "16bit i/o bus\n");
	}
	regmap_update_bits(mc, AT91_MC_SMC_CSR(cf->board->chipselect),
			   AT91_MC_SMC_DBW, csr);

	io->start = cf->socket.io_offset;
	io->stop = io->start + SZ_2K - 1;

	return 0;
}

/* pcmcia layer maps/unmaps mem regions */
static int
at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
{
	struct at91_cf_socket	*cf;

	if (map->card_start)
		return -EINVAL;

	cf = container_of(s, struct at91_cf_socket, socket);

	map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT);
	if (map->flags & MAP_ATTRIB)
		map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS;
	else
		map->static_start = cf->phys_baseaddr + CF_MEM_PHYS;

	return 0;
}

static struct pccard_operations at91_cf_ops = {
	.init			= at91_cf_ss_init,
	.suspend		= at91_cf_ss_suspend,
	.get_status		= at91_cf_get_status,
	.set_socket		= at91_cf_set_socket,
	.set_io_map		= at91_cf_set_io_map,
	.set_mem_map		= at91_cf_set_mem_map,
};

/*--------------------------------------------------------------------------*/

#if defined(CONFIG_OF)
static const struct of_device_id at91_cf_dt_ids[] = {
	{ .compatible = "atmel,at91rm9200-cf" },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, at91_cf_dt_ids);

static int at91_cf_dt_init(struct platform_device *pdev)
{
	struct at91_cf_data *board;

	board = devm_kzalloc(&pdev->dev, sizeof(*board), GFP_KERNEL);
	if (!board)
		return -ENOMEM;

	board->irq_pin = of_get_gpio(pdev->dev.of_node, 0);
	board->det_pin = of_get_gpio(pdev->dev.of_node, 1);
	board->vcc_pin = of_get_gpio(pdev->dev.of_node, 2);
	board->rst_pin = of_get_gpio(pdev->dev.of_node, 3);

	pdev->dev.platform_data = board;

	mc = syscon_regmap_lookup_by_compatible("atmel,at91rm9200-sdramc");
	if (IS_ERR(mc))
		return PTR_ERR(mc);

	return 0;
}
#else
static int at91_cf_dt_init(struct platform_device *pdev)
{
	return -ENODEV;
}
#endif

static int at91_cf_probe(struct platform_device *pdev)
{
	struct at91_cf_socket	*cf;
	struct at91_cf_data	*board = pdev->dev.platform_data;
	struct resource		*io;
	int			status;

	if (!board) {
		status = at91_cf_dt_init(pdev);
		if (status)
			return status;

		board = pdev->dev.platform_data;
	}

	if (!gpio_is_valid(board->det_pin) || !gpio_is_valid(board->rst_pin))
		return -ENODEV;

	io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!io)
		return -ENODEV;

	cf = devm_kzalloc(&pdev->dev, sizeof(*cf), GFP_KERNEL);
	if (!cf)
		return -ENOMEM;

	cf->board = board;
	cf->pdev = pdev;
	cf->phys_baseaddr = io->start;
	platform_set_drvdata(pdev, cf);

	/* must be a GPIO; ergo must trigger on both edges */
	status = devm_gpio_request(&pdev->dev, board->det_pin, "cf_det");
	if (status < 0)
		return status;

	status = devm_request_irq(&pdev->dev, gpio_to_irq(board->det_pin),
					at91_cf_irq, 0, "at91_cf detect", cf);
	if (status < 0)
		return status;

	device_init_wakeup(&pdev->dev, 1);

	status = devm_gpio_request(&pdev->dev, board->rst_pin, "cf_rst");
	if (status < 0)
		goto fail0a;

	if (gpio_is_valid(board->vcc_pin)) {
		status = devm_gpio_request(&pdev->dev, board->vcc_pin, "cf_vcc");
		if (status < 0)
			goto fail0a;
	}

	/*
	 * The card driver will request this irq later as needed.
	 * but it causes lots of "irqNN: nobody cared" messages
	 * unless we report that we handle everything (sigh).
	 * (Note:  DK board doesn't wire the IRQ pin...)
	 */
	if (gpio_is_valid(board->irq_pin)) {
		status = devm_gpio_request(&pdev->dev, board->irq_pin, "cf_irq");
		if (status < 0)
			goto fail0a;

		status = devm_request_irq(&pdev->dev, gpio_to_irq(board->irq_pin),
					at91_cf_irq, IRQF_SHARED, "at91_cf", cf);
		if (status < 0)
			goto fail0a;
		cf->socket.pci_irq = gpio_to_irq(board->irq_pin);
	} else
		cf->socket.pci_irq = nr_irqs + 1;

	/*
	 * pcmcia layer only remaps "real" memory not iospace
	 * io_offset is set to 0x10000 to avoid the check in static_find_io().
	 * */
	cf->socket.io_offset = 0x10000;
	status = pci_ioremap_io(0x10000, cf->phys_baseaddr + CF_IO_PHYS);
	if (status)
		goto fail0a;

	/* reserve chip-select regions */
	if (!devm_request_mem_region(&pdev->dev, io->start, resource_size(io), "at91_cf")) {
		status = -ENXIO;
		goto fail0a;
	}

	dev_info(&pdev->dev, "irqs det #%d, io #%d\n",
		gpio_to_irq(board->det_pin), gpio_to_irq(board->irq_pin));

	cf->socket.owner = THIS_MODULE;
	cf->socket.dev.parent = &pdev->dev;
	cf->socket.ops = &at91_cf_ops;
	cf->socket.resource_ops = &pccard_static_ops;
	cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP
				| SS_CAP_MEM_ALIGN;
	cf->socket.map_size = SZ_2K;
	cf->socket.io[0].res = io;

	status = pcmcia_register_socket(&cf->socket);
	if (status < 0)
		goto fail0a;

	return 0;

fail0a:
	device_init_wakeup(&pdev->dev, 0);
	return status;
}

static int at91_cf_remove(struct platform_device *pdev)
{
	struct at91_cf_socket	*cf = platform_get_drvdata(pdev);

	pcmcia_unregister_socket(&cf->socket);
	device_init_wakeup(&pdev->dev, 0);

	return 0;
}

#ifdef	CONFIG_PM

static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
{
	struct at91_cf_socket	*cf = platform_get_drvdata(pdev);
	struct at91_cf_data	*board = cf->board;

	if (device_may_wakeup(&pdev->dev)) {
		enable_irq_wake(gpio_to_irq(board->det_pin));
		if (gpio_is_valid(board->irq_pin))
			enable_irq_wake(gpio_to_irq(board->irq_pin));
	}
	return 0;
}

static int at91_cf_resume(struct platform_device *pdev)
{
	struct at91_cf_socket	*cf = platform_get_drvdata(pdev);
	struct at91_cf_data	*board = cf->board;

	if (device_may_wakeup(&pdev->dev)) {
		disable_irq_wake(gpio_to_irq(board->det_pin));
		if (gpio_is_valid(board->irq_pin))
			disable_irq_wake(gpio_to_irq(board->irq_pin));
	}

	return 0;
}

#else
#define	at91_cf_suspend		NULL
#define	at91_cf_resume		NULL
#endif

static struct platform_driver at91_cf_driver = {
	.driver = {
		.name		= "at91_cf",
		.of_match_table = of_match_ptr(at91_cf_dt_ids),
	},
	.probe		= at91_cf_probe,
	.remove		= at91_cf_remove,
	.suspend	= at91_cf_suspend,
	.resume		= at91_cf_resume,
};

module_platform_driver(at91_cf_driver);

MODULE_DESCRIPTION("AT91 Compact Flash Driver");
MODULE_AUTHOR("David Brownell");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:at91_cf");
Commit	Line	Data
2c1f3b7a AV	1	/*
	2	* at91_cf.c -- AT91 CompactFlash controller driver
	3	*
	4	* Copyright (C) 2005 David Brownell
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/kernel.h>
2c1f3b7a AV	14	#include <linux/platform_device.h>
	15	#include <linux/errno.h>
	16	#include <linux/init.h>
	17	#include <linux/interrupt.h>
5a0e3ad6	18	#include <linux/slab.h>
80af9e6d	19	#include <linux/gpio.h>
bcd2360c	20	#include <linux/platform_data/atmel.h>
a843168d JE	21	#include <linux/io.h>
a843168d JE	22	#include <linux/sizes.h>
eaa9a21d AB	23	#include <linux/mfd/syscon.h>
eaa9a21d AB	24	#include <linux/mfd/syscon/atmel-mc.h>
ed9084ec JE	25	#include <linux/of.h>
	26	#include <linux/of_device.h>
	27	#include <linux/of_gpio.h>
eaa9a21d	28	#include <linux/regmap.h>
2c1f3b7a AV	29
	30	#include <pcmcia/ss.h>
	31
2c1f3b7a AV	32	/*
	33	* A0..A10 work in each range; A23 indicates I/O space; A25 is CFRNW;
	34	* some other bit in {A24,A22..A11} is nREG to flag memory access
	35	* (vs attributes). So more than 2KB/region would just be waste.
ebe5cfb3	36	* Note: These are offsets from the physical base address.
2c1f3b7a	37	*/
ebe5cfb3 AV	38	#define CF_ATTR_PHYS (0)
	39	#define CF_IO_PHYS (1 << 23)
	40	#define CF_MEM_PHYS (0x017ff800)
2c1f3b7a	41
eaa9a21d AB	42	struct regmap *mc;
eaa9a21d AB	43
2c1f3b7a AV	44	/--------------------------------------------------------------------------/
2c1f3b7a AV	45
2c1f3b7a AV	46	struct at91_cf_socket {
	47	struct pcmcia_socket socket;
	48
	49	unsigned present:1;
	50
	51	struct platform_device *pdev;
	52	struct at91_cf_data *board;
ebe5cfb3 AV	53
ebe5cfb3 AV	54	unsigned long phys_baseaddr;
2c1f3b7a AV	55	};
2c1f3b7a AV	56
2c1f3b7a AV	57	static inline int at91_cf_present(struct at91_cf_socket *cf)
2c1f3b7a AV	58	{
4c1fc445	59	return !gpio_get_value(cf->board->det_pin);
2c1f3b7a AV	60	}
	61
	62	/--------------------------------------------------------------------------/
	63
	64	static int at91_cf_ss_init(struct pcmcia_socket *s)
	65	{
	66	return 0;
	67	}
	68
7d12e780	69	static irqreturn_t at91_cf_irq(int irq, void *_cf)
2c1f3b7a	70	{
c7bec5ab	71	struct at91_cf_socket *cf = _cf;
2c1f3b7a	72
80af9e6d	73	if (irq == gpio_to_irq(cf->board->det_pin)) {
2c1f3b7a AV	74	unsigned present = at91_cf_present(cf);
	75
	76	/* kick pccard as needed */
	77	if (present != cf->present) {
	78	cf->present = present;
40ca0209	79	dev_dbg(&cf->pdev->dev, "card %s\n",
2c536200	80	present ? "present" : "gone");
2c1f3b7a AV	81	pcmcia_parse_events(&cf->socket, SS_DETECT);
	82	}
	83	}
	84
	85	return IRQ_HANDLED;
	86	}
	87
	88	static int at91_cf_get_status(struct pcmcia_socket s, u_int sp)
	89	{
	90	struct at91_cf_socket *cf;
	91
	92	if (!sp)
	93	return -EINVAL;
	94
	95	cf = container_of(s, struct at91_cf_socket, socket);
	96
2c536200	97	/* NOTE: CF is always 3VCARD */
2c1f3b7a	98	if (at91_cf_present(cf)) {
80af9e6d JE	99	int rdy = gpio_is_valid(cf->board->irq_pin); /* RDY/nIRQ */
80af9e6d JE	100	int vcc = gpio_is_valid(cf->board->vcc_pin);
2c1f3b7a AV	101
2c1f3b7a AV	102	*sp = SS_DETECT \| SS_3VCARD;
e39506b4	103	if (!rdy \|\| gpio_get_value(cf->board->irq_pin))
2c1f3b7a	104	*sp \|= SS_READY;
e39506b4	105	if (!vcc \|\| gpio_get_value(cf->board->vcc_pin))
2c1f3b7a AV	106	*sp \|= SS_POWERON;
	107	} else
	108	*sp = 0;
	109
	110	return 0;
	111	}
	112
2c536200 DB	113	static int
2c536200 DB	114	at91_cf_set_socket(struct pcmcia_socket sock, struct socket_state_t s)
2c1f3b7a AV	115	{
	116	struct at91_cf_socket *cf;
	117
	118	cf = container_of(sock, struct at91_cf_socket, socket);
	119
	120	/* switch Vcc if needed and possible */
80af9e6d	121	if (gpio_is_valid(cf->board->vcc_pin)) {
2c1f3b7a	122	switch (s->Vcc) {
d652f702 LN	123	case 0:
	124	gpio_set_value(cf->board->vcc_pin, 0);
	125	break;
	126	case 33:
	127	gpio_set_value(cf->board->vcc_pin, 1);
	128	break;
	129	default:
	130	return -EINVAL;
2c1f3b7a AV	131	}
	132	}
	133
	134	/* toggle reset if needed */
4c1fc445	135	gpio_set_value(cf->board->rst_pin, s->flags & SS_RESET);
2c1f3b7a	136
40ca0209 JE	137	dev_dbg(&cf->pdev->dev, "Vcc %d, io_irq %d, flags %04x csc %04x\n",
40ca0209 JE	138	s->Vcc, s->io_irq, s->flags, s->csc_mask);
2c1f3b7a AV	139
	140	return 0;
	141	}
	142
	143	static int at91_cf_ss_suspend(struct pcmcia_socket *s)
	144	{
	145	return at91_cf_set_socket(s, &dead_socket);
	146	}
	147
	148	/* we already mapped the I/O region */
	149	static int at91_cf_set_io_map(struct pcmcia_socket s, struct pccard_io_map io)
	150	{
	151	struct at91_cf_socket *cf;
	152	u32 csr;
	153
	154	cf = container_of(s, struct at91_cf_socket, socket);
	155	io->flags &= (MAP_ACTIVE \| MAP_16BIT \| MAP_AUTOSZ);
	156
	157	/*
	158	* Use 16 bit accesses unless/until we need 8-bit i/o space.
eaa9a21d	159	*
2c1f3b7a AV	160	* NOTE: this CF controller ignores IOIS16, so we can't really do
	161	* MAP_AUTOSZ. The 16bit mode allows single byte access on either
	162	* D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many
	163	* purposes (and handles ide-cs).
	164	*
	165	* The 8bit mode is needed for odd byte access on D0-D7. It seems
	166	* some cards only like that way to get at the odd byte, despite
	167	* CF 3.0 spec table 35 also giving the D8-D15 option.
	168	*/
ebe5cfb3	169	if (!(io->flags & (MAP_16BIT \| MAP_AUTOSZ))) {
eaa9a21d	170	csr = AT91_MC_SMC_DBW_8;
40ca0209	171	dev_dbg(&cf->pdev->dev, "8bit i/o bus\n");
2c1f3b7a	172	} else {
eaa9a21d	173	csr = AT91_MC_SMC_DBW_16;
40ca0209	174	dev_dbg(&cf->pdev->dev, "16bit i/o bus\n");
2c1f3b7a	175	}
eaa9a21d AB	176	regmap_update_bits(mc, AT91_MC_SMC_CSR(cf->board->chipselect),
eaa9a21d AB	177	AT91_MC_SMC_DBW, csr);
2c1f3b7a AV	178
	179	io->start = cf->socket.io_offset;
	180	io->stop = io->start + SZ_2K - 1;
	181
	182	return 0;
	183	}
	184
	185	/* pcmcia layer maps/unmaps mem regions */
2c536200 DB	186	static int
2c536200 DB	187	at91_cf_set_mem_map(struct pcmcia_socket s, struct pccard_mem_map map)
2c1f3b7a AV	188	{
	189	struct at91_cf_socket *cf;
	190
	191	if (map->card_start)
	192	return -EINVAL;
	193
	194	cf = container_of(s, struct at91_cf_socket, socket);
	195
ebe5cfb3	196	map->flags &= (MAP_ACTIVE \| MAP_ATTRIB \| MAP_16BIT);
2c1f3b7a	197	if (map->flags & MAP_ATTRIB)
ebe5cfb3	198	map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS;
2c1f3b7a	199	else
ebe5cfb3	200	map->static_start = cf->phys_baseaddr + CF_MEM_PHYS;
2c1f3b7a AV	201
	202	return 0;
	203	}
	204
	205	static struct pccard_operations at91_cf_ops = {
	206	.init = at91_cf_ss_init,
	207	.suspend = at91_cf_ss_suspend,
	208	.get_status = at91_cf_get_status,
	209	.set_socket = at91_cf_set_socket,
	210	.set_io_map = at91_cf_set_io_map,
	211	.set_mem_map = at91_cf_set_mem_map,
	212	};
	213
	214	/--------------------------------------------------------------------------/
	215
ed9084ec JE	216	#if defined(CONFIG_OF)
	217	static const struct of_device_id at91_cf_dt_ids[] = {
	218	{ .compatible = "atmel,at91rm9200-cf" },
	219	{ /* sentinel */ }
	220	};
	221	MODULE_DEVICE_TABLE(of, at91_cf_dt_ids);
	222
	223	static int at91_cf_dt_init(struct platform_device *pdev)
	224	{
	225	struct at91_cf_data *board;
	226
	227	board = devm_kzalloc(&pdev->dev, sizeof(*board), GFP_KERNEL);
	228	if (!board)
	229	return -ENOMEM;
	230
	231	board->irq_pin = of_get_gpio(pdev->dev.of_node, 0);
	232	board->det_pin = of_get_gpio(pdev->dev.of_node, 1);
	233	board->vcc_pin = of_get_gpio(pdev->dev.of_node, 2);
	234	board->rst_pin = of_get_gpio(pdev->dev.of_node, 3);
	235
	236	pdev->dev.platform_data = board;
	237
eaa9a21d AB	238	mc = syscon_regmap_lookup_by_compatible("atmel,at91rm9200-sdramc");
	239	if (IS_ERR(mc))
	240	return PTR_ERR(mc);
	241
ed9084ec JE	242	return 0;
	243	}
	244	#else
	245	static int at91_cf_dt_init(struct platform_device *pdev)
	246	{
	247	return -ENODEV;
	248	}
	249	#endif
	250
16a7c7cf	251	static int at91_cf_probe(struct platform_device *pdev)
2c1f3b7a AV	252	{
2c1f3b7a AV	253	struct at91_cf_socket *cf;
0db6095d	254	struct at91_cf_data *board = pdev->dev.platform_data;
2c536200	255	struct resource *io;
2c1f3b7a AV	256	int status;
2c1f3b7a AV	257
ed9084ec JE	258	if (!board) {
	259	status = at91_cf_dt_init(pdev);
	260	if (status)
	261	return status;
	262
	263	board = pdev->dev.platform_data;
	264	}
	265
	266	if (!gpio_is_valid(board->det_pin) \|\| !gpio_is_valid(board->rst_pin))
2c1f3b7a AV	267	return -ENODEV;
2c1f3b7a AV	268
2c536200 DB	269	io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	270	if (!io)
	271	return -ENODEV;
	272
54fe1591	273	cf = devm_kzalloc(&pdev->dev, sizeof(*cf), GFP_KERNEL);
2c1f3b7a AV	274	if (!cf)
	275	return -ENOMEM;
	276
	277	cf->board = board;
	278	cf->pdev = pdev;
ebe5cfb3	279	cf->phys_baseaddr = io->start;
0db6095d	280	platform_set_drvdata(pdev, cf);
2c1f3b7a	281
2c1f3b7a	282	/* must be a GPIO; ergo must trigger on both edges */
54fe1591	283	status = devm_gpio_request(&pdev->dev, board->det_pin, "cf_det");
2c1f3b7a	284	if (status < 0)
54fe1591 JE	285	return status;
	286
	287	status = devm_request_irq(&pdev->dev, gpio_to_irq(board->det_pin),
	288	at91_cf_irq, 0, "at91_cf detect", cf);
4c1fc445	289	if (status < 0)
54fe1591 JE	290	return status;
54fe1591 JE	291
0db6095d	292	device_init_wakeup(&pdev->dev, 1);
2c1f3b7a	293
54fe1591	294	status = devm_gpio_request(&pdev->dev, board->rst_pin, "cf_rst");
4c1fc445 DB	295	if (status < 0)
	296	goto fail0a;
	297
80af9e6d	298	if (gpio_is_valid(board->vcc_pin)) {
54fe1591	299	status = devm_gpio_request(&pdev->dev, board->vcc_pin, "cf_vcc");
4c1fc445	300	if (status < 0)
54fe1591	301	goto fail0a;
4c1fc445 DB	302	}
4c1fc445 DB	303
2c1f3b7a AV	304	/*
	305	* The card driver will request this irq later as needed.
	306	* but it causes lots of "irqNN: nobody cared" messages
	307	* unless we report that we handle everything (sigh).
	308	* (Note: DK board doesn't wire the IRQ pin...)
	309	*/
80af9e6d	310	if (gpio_is_valid(board->irq_pin)) {
54fe1591	311	status = devm_gpio_request(&pdev->dev, board->irq_pin, "cf_irq");
4c1fc445	312	if (status < 0)
54fe1591 JE	313	goto fail0a;
	314
	315	status = devm_request_irq(&pdev->dev, gpio_to_irq(board->irq_pin),
	316	at91_cf_irq, IRQF_SHARED, "at91_cf", cf);
2c1f3b7a	317	if (status < 0)
54fe1591	318	goto fail0a;
80af9e6d	319	cf->socket.pci_irq = gpio_to_irq(board->irq_pin);
2c536200	320	} else
9130adda	321	cf->socket.pci_irq = nr_irqs + 1;
2c1f3b7a	322
1be27c62 AB	323	/*
	324	* pcmcia layer only remaps "real" memory not iospace
	325	* io_offset is set to 0x10000 to avoid the check in static_find_io().
	326	* */
	327	cf->socket.io_offset = 0x10000;
	328	status = pci_ioremap_io(0x10000, cf->phys_baseaddr + CF_IO_PHYS);
	329	if (status)
54fe1591	330	goto fail0a;
2c1f3b7a	331
40a0017e	332	/* reserve chip-select regions */
54fe1591	333	if (!devm_request_mem_region(&pdev->dev, io->start, resource_size(io), "at91_cf")) {
ebe5cfb3	334	status = -ENXIO;
54fe1591	335	goto fail0a;
ebe5cfb3	336	}
2c1f3b7a	337
40ca0209	338	dev_info(&pdev->dev, "irqs det #%d, io #%d\n",
80af9e6d	339	gpio_to_irq(board->det_pin), gpio_to_irq(board->irq_pin));
2c1f3b7a AV	340
2c1f3b7a AV	341	cf->socket.owner = THIS_MODULE;
e4a3c3f0	342	cf->socket.dev.parent = &pdev->dev;
2c1f3b7a AV	343	cf->socket.ops = &at91_cf_ops;
	344	cf->socket.resource_ops = &pccard_static_ops;
	345	cf->socket.features = SS_CAP_PCCARD \| SS_CAP_STATIC_MAP
	346	\| SS_CAP_MEM_ALIGN;
	347	cf->socket.map_size = SZ_2K;
2c536200	348	cf->socket.io[0].res = io;
2c1f3b7a AV	349
	350	status = pcmcia_register_socket(&cf->socket);
	351	if (status < 0)
54fe1591	352	goto fail0a;
2c1f3b7a AV	353
	354	return 0;
	355
2c1f3b7a	356	fail0a:
1fbece15	357	device_init_wakeup(&pdev->dev, 0);
2c1f3b7a AV	358	return status;
	359	}
	360
16a7c7cf	361	static int at91_cf_remove(struct platform_device *pdev)
2c1f3b7a	362	{
0db6095d	363	struct at91_cf_socket *cf = platform_get_drvdata(pdev);
2c1f3b7a AV	364
2c1f3b7a AV	365	pcmcia_unregister_socket(&cf->socket);
0db6095d	366	device_init_wakeup(&pdev->dev, 0);
54fe1591	367
2c1f3b7a AV	368	return 0;
	369	}
	370
0db6095d DB	371	#ifdef CONFIG_PM
	372
	373	static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
	374	{
	375	struct at91_cf_socket *cf = platform_get_drvdata(pdev);
	376	struct at91_cf_data *board = cf->board;
	377
1fbece15	378	if (device_may_wakeup(&pdev->dev)) {
80af9e6d JE	379	enable_irq_wake(gpio_to_irq(board->det_pin));
	380	if (gpio_is_valid(board->irq_pin))
	381	enable_irq_wake(gpio_to_irq(board->irq_pin));
0db6095d	382	}
0db6095d DB	383	return 0;
	384	}
	385
	386	static int at91_cf_resume(struct platform_device *pdev)
	387	{
9af20376 MP	388	struct at91_cf_socket *cf = platform_get_drvdata(pdev);
	389	struct at91_cf_data *board = cf->board;
	390
	391	if (device_may_wakeup(&pdev->dev)) {
80af9e6d JE	392	disable_irq_wake(gpio_to_irq(board->det_pin));
	393	if (gpio_is_valid(board->irq_pin))
	394	disable_irq_wake(gpio_to_irq(board->irq_pin));
9af20376 MP	395	}
9af20376 MP	396
0db6095d DB	397	return 0;
	398	}
	399
	400	#else
	401	#define at91_cf_suspend NULL
	402	#define at91_cf_resume NULL
	403	#endif
	404
	405	static struct platform_driver at91_cf_driver = {
	406	.driver = {
40ca0209	407	.name = "at91_cf",
ed9084ec	408	.of_match_table = of_match_ptr(at91_cf_dt_ids),
0db6095d	409	},
16a7c7cf JH	410	.probe = at91_cf_probe,
16a7c7cf JH	411	.remove = at91_cf_remove,
0db6095d DB	412	.suspend = at91_cf_suspend,
0db6095d DB	413	.resume = at91_cf_resume,
2c1f3b7a AV	414	};
2c1f3b7a AV	415
16a7c7cf	416	module_platform_driver(at91_cf_driver);
2c1f3b7a AV	417
	418	MODULE_DESCRIPTION("AT91 Compact Flash Driver");
	419	MODULE_AUTHOR("David Brownell");
	420	MODULE_LICENSE("GPL");
12c2c019	421	MODULE_ALIAS("platform:at91_cf");