[linux-2.6-block.git] / drivers / pcmcia / at91_cf.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * at91_cf.c -- AT91 CompactFlash controller driver
 *
 * Copyright (C) 2005 David Brownell
 */

#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");

	return PTR_ERR_OR_ZERO(mc);
}
#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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
2c1f3b7a AV	2	/*
	3	* at91_cf.c -- AT91 CompactFlash controller driver
	4	*
	5	* Copyright (C) 2005 David Brownell
2c1f3b7a AV	6	*/
	7
	8	#include <linux/module.h>
	9	#include <linux/kernel.h>
2c1f3b7a AV	10	#include <linux/platform_device.h>
	11	#include <linux/errno.h>
	12	#include <linux/init.h>
	13	#include <linux/interrupt.h>
5a0e3ad6	14	#include <linux/slab.h>
80af9e6d	15	#include <linux/gpio.h>
bcd2360c	16	#include <linux/platform_data/atmel.h>
a843168d JE	17	#include <linux/io.h>
a843168d JE	18	#include <linux/sizes.h>
eaa9a21d AB	19	#include <linux/mfd/syscon.h>
eaa9a21d AB	20	#include <linux/mfd/syscon/atmel-mc.h>
ed9084ec JE	21	#include <linux/of.h>
	22	#include <linux/of_device.h>
	23	#include <linux/of_gpio.h>
eaa9a21d	24	#include <linux/regmap.h>
2c1f3b7a AV	25
	26	#include <pcmcia/ss.h>
	27
2c1f3b7a AV	28	/*
	29	* A0..A10 work in each range; A23 indicates I/O space; A25 is CFRNW;
	30	* some other bit in {A24,A22..A11} is nREG to flag memory access
	31	* (vs attributes). So more than 2KB/region would just be waste.
ebe5cfb3	32	* Note: These are offsets from the physical base address.
2c1f3b7a	33	*/
ebe5cfb3 AV	34	#define CF_ATTR_PHYS (0)
	35	#define CF_IO_PHYS (1 << 23)
	36	#define CF_MEM_PHYS (0x017ff800)
2c1f3b7a	37
eaa9a21d AB	38	struct regmap *mc;
eaa9a21d AB	39
2c1f3b7a AV	40	/--------------------------------------------------------------------------/
2c1f3b7a AV	41
2c1f3b7a AV	42	struct at91_cf_socket {
	43	struct pcmcia_socket socket;
	44
	45	unsigned present:1;
	46
	47	struct platform_device *pdev;
	48	struct at91_cf_data *board;
ebe5cfb3 AV	49
ebe5cfb3 AV	50	unsigned long phys_baseaddr;
2c1f3b7a AV	51	};
2c1f3b7a AV	52
2c1f3b7a AV	53	static inline int at91_cf_present(struct at91_cf_socket *cf)
2c1f3b7a AV	54	{
4c1fc445	55	return !gpio_get_value(cf->board->det_pin);
2c1f3b7a AV	56	}
	57
	58	/--------------------------------------------------------------------------/
	59
	60	static int at91_cf_ss_init(struct pcmcia_socket *s)
	61	{
	62	return 0;
	63	}
	64
7d12e780	65	static irqreturn_t at91_cf_irq(int irq, void *_cf)
2c1f3b7a	66	{
c7bec5ab	67	struct at91_cf_socket *cf = _cf;
2c1f3b7a	68
80af9e6d	69	if (irq == gpio_to_irq(cf->board->det_pin)) {
2c1f3b7a AV	70	unsigned present = at91_cf_present(cf);
	71
	72	/* kick pccard as needed */
	73	if (present != cf->present) {
	74	cf->present = present;
40ca0209	75	dev_dbg(&cf->pdev->dev, "card %s\n",
2c536200	76	present ? "present" : "gone");
2c1f3b7a AV	77	pcmcia_parse_events(&cf->socket, SS_DETECT);
	78	}
	79	}
	80
	81	return IRQ_HANDLED;
	82	}
	83
	84	static int at91_cf_get_status(struct pcmcia_socket s, u_int sp)
	85	{
	86	struct at91_cf_socket *cf;
	87
	88	if (!sp)
	89	return -EINVAL;
	90
	91	cf = container_of(s, struct at91_cf_socket, socket);
	92
2c536200	93	/* NOTE: CF is always 3VCARD */
2c1f3b7a	94	if (at91_cf_present(cf)) {
80af9e6d JE	95	int rdy = gpio_is_valid(cf->board->irq_pin); /* RDY/nIRQ */
80af9e6d JE	96	int vcc = gpio_is_valid(cf->board->vcc_pin);
2c1f3b7a AV	97
2c1f3b7a AV	98	*sp = SS_DETECT \| SS_3VCARD;
e39506b4	99	if (!rdy \|\| gpio_get_value(cf->board->irq_pin))
2c1f3b7a	100	*sp \|= SS_READY;
e39506b4	101	if (!vcc \|\| gpio_get_value(cf->board->vcc_pin))
2c1f3b7a AV	102	*sp \|= SS_POWERON;
	103	} else
	104	*sp = 0;
	105
	106	return 0;
	107	}
	108
2c536200 DB	109	static int
2c536200 DB	110	at91_cf_set_socket(struct pcmcia_socket sock, struct socket_state_t s)
2c1f3b7a AV	111	{
	112	struct at91_cf_socket *cf;
	113
	114	cf = container_of(sock, struct at91_cf_socket, socket);
	115
	116	/* switch Vcc if needed and possible */
80af9e6d	117	if (gpio_is_valid(cf->board->vcc_pin)) {
2c1f3b7a	118	switch (s->Vcc) {
d652f702 LN	119	case 0:
	120	gpio_set_value(cf->board->vcc_pin, 0);
	121	break;
	122	case 33:
	123	gpio_set_value(cf->board->vcc_pin, 1);
	124	break;
	125	default:
	126	return -EINVAL;
2c1f3b7a AV	127	}
	128	}
	129
	130	/* toggle reset if needed */
4c1fc445	131	gpio_set_value(cf->board->rst_pin, s->flags & SS_RESET);
2c1f3b7a	132
40ca0209 JE	133	dev_dbg(&cf->pdev->dev, "Vcc %d, io_irq %d, flags %04x csc %04x\n",
40ca0209 JE	134	s->Vcc, s->io_irq, s->flags, s->csc_mask);
2c1f3b7a AV	135
	136	return 0;
	137	}
	138
	139	static int at91_cf_ss_suspend(struct pcmcia_socket *s)
	140	{
	141	return at91_cf_set_socket(s, &dead_socket);
	142	}
	143
	144	/* we already mapped the I/O region */
	145	static int at91_cf_set_io_map(struct pcmcia_socket s, struct pccard_io_map io)
	146	{
	147	struct at91_cf_socket *cf;
	148	u32 csr;
	149
	150	cf = container_of(s, struct at91_cf_socket, socket);
	151	io->flags &= (MAP_ACTIVE \| MAP_16BIT \| MAP_AUTOSZ);
	152
	153	/*
	154	* Use 16 bit accesses unless/until we need 8-bit i/o space.
eaa9a21d	155	*
2c1f3b7a AV	156	* NOTE: this CF controller ignores IOIS16, so we can't really do
	157	* MAP_AUTOSZ. The 16bit mode allows single byte access on either
	158	* D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many
	159	* purposes (and handles ide-cs).
	160	*
	161	* The 8bit mode is needed for odd byte access on D0-D7. It seems
	162	* some cards only like that way to get at the odd byte, despite
	163	* CF 3.0 spec table 35 also giving the D8-D15 option.
	164	*/
ebe5cfb3	165	if (!(io->flags & (MAP_16BIT \| MAP_AUTOSZ))) {
eaa9a21d	166	csr = AT91_MC_SMC_DBW_8;
40ca0209	167	dev_dbg(&cf->pdev->dev, "8bit i/o bus\n");
2c1f3b7a	168	} else {
eaa9a21d	169	csr = AT91_MC_SMC_DBW_16;
40ca0209	170	dev_dbg(&cf->pdev->dev, "16bit i/o bus\n");
2c1f3b7a	171	}
eaa9a21d AB	172	regmap_update_bits(mc, AT91_MC_SMC_CSR(cf->board->chipselect),
eaa9a21d AB	173	AT91_MC_SMC_DBW, csr);
2c1f3b7a AV	174
	175	io->start = cf->socket.io_offset;
	176	io->stop = io->start + SZ_2K - 1;
	177
	178	return 0;
	179	}
	180
	181	/* pcmcia layer maps/unmaps mem regions */
2c536200 DB	182	static int
2c536200 DB	183	at91_cf_set_mem_map(struct pcmcia_socket s, struct pccard_mem_map map)
2c1f3b7a AV	184	{
	185	struct at91_cf_socket *cf;
	186
	187	if (map->card_start)
	188	return -EINVAL;
	189
	190	cf = container_of(s, struct at91_cf_socket, socket);
	191
ebe5cfb3	192	map->flags &= (MAP_ACTIVE \| MAP_ATTRIB \| MAP_16BIT);
2c1f3b7a	193	if (map->flags & MAP_ATTRIB)
ebe5cfb3	194	map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS;
2c1f3b7a	195	else
ebe5cfb3	196	map->static_start = cf->phys_baseaddr + CF_MEM_PHYS;
2c1f3b7a AV	197
	198	return 0;
	199	}
	200
	201	static struct pccard_operations at91_cf_ops = {
	202	.init = at91_cf_ss_init,
	203	.suspend = at91_cf_ss_suspend,
	204	.get_status = at91_cf_get_status,
	205	.set_socket = at91_cf_set_socket,
	206	.set_io_map = at91_cf_set_io_map,
	207	.set_mem_map = at91_cf_set_mem_map,
	208	};
	209
	210	/--------------------------------------------------------------------------/
	211
ed9084ec JE	212	#if defined(CONFIG_OF)
	213	static const struct of_device_id at91_cf_dt_ids[] = {
	214	{ .compatible = "atmel,at91rm9200-cf" },
	215	{ /* sentinel */ }
	216	};
	217	MODULE_DEVICE_TABLE(of, at91_cf_dt_ids);
	218
	219	static int at91_cf_dt_init(struct platform_device *pdev)
	220	{
	221	struct at91_cf_data *board;
	222
	223	board = devm_kzalloc(&pdev->dev, sizeof(*board), GFP_KERNEL);
	224	if (!board)
	225	return -ENOMEM;
	226
	227	board->irq_pin = of_get_gpio(pdev->dev.of_node, 0);
	228	board->det_pin = of_get_gpio(pdev->dev.of_node, 1);
	229	board->vcc_pin = of_get_gpio(pdev->dev.of_node, 2);
	230	board->rst_pin = of_get_gpio(pdev->dev.of_node, 3);
	231
	232	pdev->dev.platform_data = board;
	233
eaa9a21d	234	mc = syscon_regmap_lookup_by_compatible("atmel,at91rm9200-sdramc");
eaa9a21d	235
12038392	236	return PTR_ERR_OR_ZERO(mc);
ed9084ec JE	237	}
	238	#else
	239	static int at91_cf_dt_init(struct platform_device *pdev)
	240	{
	241	return -ENODEV;
	242	}
	243	#endif
	244
16a7c7cf	245	static int at91_cf_probe(struct platform_device *pdev)
2c1f3b7a AV	246	{
2c1f3b7a AV	247	struct at91_cf_socket *cf;
0db6095d	248	struct at91_cf_data *board = pdev->dev.platform_data;
2c536200	249	struct resource *io;
2c1f3b7a AV	250	int status;
2c1f3b7a AV	251
ed9084ec JE	252	if (!board) {
	253	status = at91_cf_dt_init(pdev);
	254	if (status)
	255	return status;
	256
	257	board = pdev->dev.platform_data;
	258	}
	259
	260	if (!gpio_is_valid(board->det_pin) \|\| !gpio_is_valid(board->rst_pin))
2c1f3b7a AV	261	return -ENODEV;
2c1f3b7a AV	262
2c536200 DB	263	io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	264	if (!io)
	265	return -ENODEV;
	266
54fe1591	267	cf = devm_kzalloc(&pdev->dev, sizeof(*cf), GFP_KERNEL);
2c1f3b7a AV	268	if (!cf)
	269	return -ENOMEM;
	270
	271	cf->board = board;
	272	cf->pdev = pdev;
ebe5cfb3	273	cf->phys_baseaddr = io->start;
0db6095d	274	platform_set_drvdata(pdev, cf);
2c1f3b7a	275
2c1f3b7a	276	/* must be a GPIO; ergo must trigger on both edges */
54fe1591	277	status = devm_gpio_request(&pdev->dev, board->det_pin, "cf_det");
2c1f3b7a	278	if (status < 0)
54fe1591 JE	279	return status;
	280
	281	status = devm_request_irq(&pdev->dev, gpio_to_irq(board->det_pin),
	282	at91_cf_irq, 0, "at91_cf detect", cf);
4c1fc445	283	if (status < 0)
54fe1591 JE	284	return status;
54fe1591 JE	285
0db6095d	286	device_init_wakeup(&pdev->dev, 1);
2c1f3b7a	287
54fe1591	288	status = devm_gpio_request(&pdev->dev, board->rst_pin, "cf_rst");
4c1fc445 DB	289	if (status < 0)
	290	goto fail0a;
	291
80af9e6d	292	if (gpio_is_valid(board->vcc_pin)) {
54fe1591	293	status = devm_gpio_request(&pdev->dev, board->vcc_pin, "cf_vcc");
4c1fc445	294	if (status < 0)
54fe1591	295	goto fail0a;
4c1fc445 DB	296	}
4c1fc445 DB	297
2c1f3b7a AV	298	/*
	299	* The card driver will request this irq later as needed.
	300	* but it causes lots of "irqNN: nobody cared" messages
	301	* unless we report that we handle everything (sigh).
	302	* (Note: DK board doesn't wire the IRQ pin...)
	303	*/
80af9e6d	304	if (gpio_is_valid(board->irq_pin)) {
54fe1591	305	status = devm_gpio_request(&pdev->dev, board->irq_pin, "cf_irq");
4c1fc445	306	if (status < 0)
54fe1591 JE	307	goto fail0a;
	308
	309	status = devm_request_irq(&pdev->dev, gpio_to_irq(board->irq_pin),
	310	at91_cf_irq, IRQF_SHARED, "at91_cf", cf);
2c1f3b7a	311	if (status < 0)
54fe1591	312	goto fail0a;
80af9e6d	313	cf->socket.pci_irq = gpio_to_irq(board->irq_pin);
2c536200	314	} else
9130adda	315	cf->socket.pci_irq = nr_irqs + 1;
2c1f3b7a	316
1be27c62 AB	317	/*
	318	* pcmcia layer only remaps "real" memory not iospace
	319	* io_offset is set to 0x10000 to avoid the check in static_find_io().
	320	* */
	321	cf->socket.io_offset = 0x10000;
	322	status = pci_ioremap_io(0x10000, cf->phys_baseaddr + CF_IO_PHYS);
	323	if (status)
54fe1591	324	goto fail0a;
2c1f3b7a	325
40a0017e	326	/* reserve chip-select regions */
54fe1591	327	if (!devm_request_mem_region(&pdev->dev, io->start, resource_size(io), "at91_cf")) {
ebe5cfb3	328	status = -ENXIO;
54fe1591	329	goto fail0a;
ebe5cfb3	330	}
2c1f3b7a	331
40ca0209	332	dev_info(&pdev->dev, "irqs det #%d, io #%d\n",
80af9e6d	333	gpio_to_irq(board->det_pin), gpio_to_irq(board->irq_pin));
2c1f3b7a AV	334
2c1f3b7a AV	335	cf->socket.owner = THIS_MODULE;
e4a3c3f0	336	cf->socket.dev.parent = &pdev->dev;
2c1f3b7a AV	337	cf->socket.ops = &at91_cf_ops;
	338	cf->socket.resource_ops = &pccard_static_ops;
	339	cf->socket.features = SS_CAP_PCCARD \| SS_CAP_STATIC_MAP
	340	\| SS_CAP_MEM_ALIGN;
	341	cf->socket.map_size = SZ_2K;
2c536200	342	cf->socket.io[0].res = io;
2c1f3b7a AV	343
	344	status = pcmcia_register_socket(&cf->socket);
	345	if (status < 0)
54fe1591	346	goto fail0a;
2c1f3b7a AV	347
	348	return 0;
	349
2c1f3b7a	350	fail0a:
1fbece15	351	device_init_wakeup(&pdev->dev, 0);
2c1f3b7a AV	352	return status;
	353	}
	354
16a7c7cf	355	static int at91_cf_remove(struct platform_device *pdev)
2c1f3b7a	356	{
0db6095d	357	struct at91_cf_socket *cf = platform_get_drvdata(pdev);
2c1f3b7a AV	358
2c1f3b7a AV	359	pcmcia_unregister_socket(&cf->socket);
0db6095d	360	device_init_wakeup(&pdev->dev, 0);
54fe1591	361
2c1f3b7a AV	362	return 0;
	363	}
	364
0db6095d DB	365	#ifdef CONFIG_PM
	366
	367	static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
	368	{
	369	struct at91_cf_socket *cf = platform_get_drvdata(pdev);
	370	struct at91_cf_data *board = cf->board;
	371
1fbece15	372	if (device_may_wakeup(&pdev->dev)) {
80af9e6d JE	373	enable_irq_wake(gpio_to_irq(board->det_pin));
	374	if (gpio_is_valid(board->irq_pin))
	375	enable_irq_wake(gpio_to_irq(board->irq_pin));
0db6095d	376	}
0db6095d DB	377	return 0;
	378	}
	379
	380	static int at91_cf_resume(struct platform_device *pdev)
	381	{
9af20376 MP	382	struct at91_cf_socket *cf = platform_get_drvdata(pdev);
	383	struct at91_cf_data *board = cf->board;
	384
	385	if (device_may_wakeup(&pdev->dev)) {
80af9e6d JE	386	disable_irq_wake(gpio_to_irq(board->det_pin));
	387	if (gpio_is_valid(board->irq_pin))
	388	disable_irq_wake(gpio_to_irq(board->irq_pin));
9af20376 MP	389	}
9af20376 MP	390
0db6095d DB	391	return 0;
	392	}
	393
	394	#else
	395	#define at91_cf_suspend NULL
	396	#define at91_cf_resume NULL
	397	#endif
	398
	399	static struct platform_driver at91_cf_driver = {
	400	.driver = {
40ca0209	401	.name = "at91_cf",
ed9084ec	402	.of_match_table = of_match_ptr(at91_cf_dt_ids),
0db6095d	403	},
16a7c7cf JH	404	.probe = at91_cf_probe,
16a7c7cf JH	405	.remove = at91_cf_remove,
0db6095d DB	406	.suspend = at91_cf_suspend,
0db6095d DB	407	.resume = at91_cf_resume,
2c1f3b7a AV	408	};
2c1f3b7a AV	409
16a7c7cf	410	module_platform_driver(at91_cf_driver);
2c1f3b7a AV	411
	412	MODULE_DESCRIPTION("AT91 Compact Flash Driver");
	413	MODULE_AUTHOR("David Brownell");
	414	MODULE_LICENSE("GPL");
12c2c019	415	MODULE_ALIAS("platform:at91_cf");