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

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2007 PA Semi, Inc
 *
 * Maintained by: Olof Johansson <olof@lixom.net>
 *
 * Based on drivers/pcmcia/omap_cf.c
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/platform_device.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/slab.h>

#include <pcmcia/ss.h>

static const char driver_name[] = "electra-cf";

struct electra_cf_socket {
	struct pcmcia_socket	socket;

	struct timer_list	timer;
	unsigned		present:1;
	unsigned		active:1;

	struct platform_device	*ofdev;
	unsigned long		mem_phys;
	void __iomem		*mem_base;
	unsigned long		mem_size;
	void __iomem		*io_virt;
	unsigned int		io_base;
	unsigned int		io_size;
	u_int			irq;
	struct resource		iomem;
	void __iomem		*gpio_base;
	int			gpio_detect;
	int			gpio_vsense;
	int			gpio_3v;
	int			gpio_5v;
};

#define	POLL_INTERVAL		(2 * HZ)


static int electra_cf_present(struct electra_cf_socket *cf)
{
	unsigned int gpio;

	gpio = in_le32(cf->gpio_base+0x40);
	return !(gpio & (1 << cf->gpio_detect));
}

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

/* the timer is primarily to kick this socket's pccardd */
static void electra_cf_timer(struct timer_list *t)
{
	struct electra_cf_socket *cf = from_timer(cf, t, timer);
	int present = electra_cf_present(cf);

	if (present != cf->present) {
		cf->present = present;
		pcmcia_parse_events(&cf->socket, SS_DETECT);
	}

	if (cf->active)
		mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
}

static irqreturn_t electra_cf_irq(int irq, void *_cf)
{
	struct electra_cf_socket *cf = _cf;

	electra_cf_timer(&cf->timer);
	return IRQ_HANDLED;
}

static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp)
{
	struct electra_cf_socket *cf;

	if (!sp)
		return -EINVAL;

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

	/* NOTE CF is always 3VCARD */
	if (electra_cf_present(cf)) {
		*sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD;

		s->pci_irq = cf->irq;
	} else
		*sp = 0;
	return 0;
}

static int electra_cf_set_socket(struct pcmcia_socket *sock,
				 struct socket_state_t *s)
{
	unsigned int gpio;
	unsigned int vcc;
	struct electra_cf_socket *cf;

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

	/* "reset" means no power in our case */
	vcc = (s->flags & SS_RESET) ? 0 : s->Vcc;

	switch (vcc) {
	case 0:
		gpio = 0;
		break;
	case 33:
		gpio = (1 << cf->gpio_3v);
		break;
	case 5:
		gpio = (1 << cf->gpio_5v);
		break;
	default:
		return -EINVAL;
	}

	gpio |= 1 << (cf->gpio_3v + 16); /* enwr */
	gpio |= 1 << (cf->gpio_5v + 16); /* enwr */
	out_le32(cf->gpio_base+0x90, gpio);

	pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
		driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);

	return 0;
}

static int electra_cf_set_io_map(struct pcmcia_socket *s,
				 struct pccard_io_map *io)
{
	return 0;
}

static int electra_cf_set_mem_map(struct pcmcia_socket *s,
				  struct pccard_mem_map *map)
{
	struct electra_cf_socket *cf;

	if (map->card_start)
		return -EINVAL;
	cf = container_of(s, struct electra_cf_socket, socket);
	map->static_start = cf->mem_phys;
	map->flags &= MAP_ACTIVE|MAP_ATTRIB;
	if (!(map->flags & MAP_ATTRIB))
		map->static_start += 0x800;
	return 0;
}

static struct pccard_operations electra_cf_ops = {
	.init			= electra_cf_ss_init,
	.get_status		= electra_cf_get_status,
	.set_socket		= electra_cf_set_socket,
	.set_io_map		= electra_cf_set_io_map,
	.set_mem_map		= electra_cf_set_mem_map,
};

static int electra_cf_probe(struct platform_device *ofdev)
{
	struct device *device = &ofdev->dev;
	struct device_node *np = ofdev->dev.of_node;
	struct electra_cf_socket   *cf;
	struct resource mem, io;
	int status;
	const unsigned int *prop;
	int err;
	struct vm_struct *area;

	err = of_address_to_resource(np, 0, &mem);
	if (err)
		return -EINVAL;

	err = of_address_to_resource(np, 1, &io);
	if (err)
		return -EINVAL;

	cf = kzalloc(sizeof(*cf), GFP_KERNEL);
	if (!cf)
		return -ENOMEM;

	timer_setup(&cf->timer, electra_cf_timer, 0);
	cf->irq = 0;

	cf->ofdev = ofdev;
	cf->mem_phys = mem.start;
	cf->mem_size = PAGE_ALIGN(resource_size(&mem));
	cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
	cf->io_size = PAGE_ALIGN(resource_size(&io));

	area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
	if (area == NULL) {
		status = -ENOMEM;
		goto fail1;
	}

	cf->io_virt = (void __iomem *)(area->addr);

	cf->gpio_base = ioremap(0xfc103000, 0x1000);
	dev_set_drvdata(device, cf);

	if (!cf->mem_base || !cf->io_virt || !cf->gpio_base ||
	    (__ioremap_at(io.start, cf->io_virt, cf->io_size,
			  pgprot_noncached(PAGE_KERNEL)) == NULL)) {
		dev_err(device, "can't ioremap ranges\n");
		status = -ENOMEM;
		goto fail1;
	}


	cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;

	cf->iomem.start = (unsigned long)cf->mem_base;
	cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
	cf->iomem.flags = IORESOURCE_MEM;

	cf->irq = irq_of_parse_and_map(np, 0);

	status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
			     driver_name, cf);
	if (status < 0) {
		dev_err(device, "request_irq failed\n");
		goto fail1;
	}

	cf->socket.pci_irq = cf->irq;

	prop = of_get_property(np, "card-detect-gpio", NULL);
	if (!prop)
		goto fail1;
	cf->gpio_detect = *prop;

	prop = of_get_property(np, "card-vsense-gpio", NULL);
	if (!prop)
		goto fail1;
	cf->gpio_vsense = *prop;

	prop = of_get_property(np, "card-3v-gpio", NULL);
	if (!prop)
		goto fail1;
	cf->gpio_3v = *prop;

	prop = of_get_property(np, "card-5v-gpio", NULL);
	if (!prop)
		goto fail1;
	cf->gpio_5v = *prop;

	cf->socket.io_offset = cf->io_base;

	/* reserve chip-select regions */
	if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
		status = -ENXIO;
		dev_err(device, "Can't claim memory region\n");
		goto fail1;
	}

	if (!request_region(cf->io_base, cf->io_size, driver_name)) {
		status = -ENXIO;
		dev_err(device, "Can't claim I/O region\n");
		goto fail2;
	}

	cf->socket.owner = THIS_MODULE;
	cf->socket.dev.parent = &ofdev->dev;
	cf->socket.ops = &electra_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 = 0x800;

	status = pcmcia_register_socket(&cf->socket);
	if (status < 0) {
		dev_err(device, "pcmcia_register_socket failed\n");
		goto fail3;
	}

	dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n",
		 cf->mem_phys, io.start, cf->irq);

	cf->active = 1;
	electra_cf_timer(&cf->timer);
	return 0;

fail3:
	release_region(cf->io_base, cf->io_size);
fail2:
	release_mem_region(cf->mem_phys, cf->mem_size);
fail1:
	if (cf->irq)
		free_irq(cf->irq, cf);

	if (cf->io_virt)
		__iounmap_at(cf->io_virt, cf->io_size);
	if (cf->mem_base)
		iounmap(cf->mem_base);
	if (cf->gpio_base)
		iounmap(cf->gpio_base);
	if (area)
		device_init_wakeup(&ofdev->dev, 0);
	kfree(cf);
	return status;

}

static int electra_cf_remove(struct platform_device *ofdev)
{
	struct device *device = &ofdev->dev;
	struct electra_cf_socket *cf;

	cf = dev_get_drvdata(device);

	cf->active = 0;
	pcmcia_unregister_socket(&cf->socket);
	free_irq(cf->irq, cf);
	del_timer_sync(&cf->timer);

	__iounmap_at(cf->io_virt, cf->io_size);
	iounmap(cf->mem_base);
	iounmap(cf->gpio_base);
	release_mem_region(cf->mem_phys, cf->mem_size);
	release_region(cf->io_base, cf->io_size);

	kfree(cf);

	return 0;
}

static const struct of_device_id electra_cf_match[] = {
	{
		.compatible   = "electra-cf",
	},
	{},
};
MODULE_DEVICE_TABLE(of, electra_cf_match);

static struct platform_driver electra_cf_driver = {
	.driver = {
		.name = driver_name,
		.of_match_table = electra_cf_match,
	},
	.probe	  = electra_cf_probe,
	.remove   = electra_cf_remove,
};

module_platform_driver(electra_cf_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");
MODULE_DESCRIPTION("PA Semi Electra CF driver");
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
2b571a06 OJ	2	/*
	3	* Copyright (C) 2007 PA Semi, Inc
	4	*
	5	* Maintained by: Olof Johansson <olof@lixom.net>
	6	*
	7	* Based on drivers/pcmcia/omap_cf.c
2b571a06 OJ	8	*/
	9
	10	#include <linux/module.h>
	11	#include <linux/kernel.h>
	12	#include <linux/sched.h>
	13	#include <linux/platform_device.h>
	14	#include <linux/errno.h>
	15	#include <linux/init.h>
	16	#include <linux/delay.h>
	17	#include <linux/interrupt.h>
27ac792c	18	#include <linux/mm.h>
2b571a06	19	#include <linux/vmalloc.h>
5af50730 RH	20	#include <linux/of_address.h>
5af50730 RH	21	#include <linux/of_irq.h>
ad19dbdb	22	#include <linux/of_platform.h>
5a0e3ad6	23	#include <linux/slab.h>
2b571a06 OJ	24
2b571a06 OJ	25	#include <pcmcia/ss.h>
2b571a06 OJ	26
	27	static const char driver_name[] = "electra-cf";
	28
	29	struct electra_cf_socket {
	30	struct pcmcia_socket socket;
	31
	32	struct timer_list timer;
	33	unsigned present:1;
	34	unsigned active:1;
	35
2dc11581	36	struct platform_device *ofdev;
2b571a06	37	unsigned long mem_phys;
0f06abd3	38	void __iomem *mem_base;
2b571a06	39	unsigned long mem_size;
0f06abd3	40	void __iomem *io_virt;
2b571a06 OJ	41	unsigned int io_base;
	42	unsigned int io_size;
	43	u_int irq;
	44	struct resource iomem;
0f06abd3	45	void __iomem *gpio_base;
2b571a06 OJ	46	int gpio_detect;
	47	int gpio_vsense;
	48	int gpio_3v;
	49	int gpio_5v;
	50	};
	51
	52	#define POLL_INTERVAL (2 * HZ)
	53
	54
	55	static int electra_cf_present(struct electra_cf_socket *cf)
	56	{
	57	unsigned int gpio;
	58
	59	gpio = in_le32(cf->gpio_base+0x40);
	60	return !(gpio & (1 << cf->gpio_detect));
	61	}
	62
	63	static int electra_cf_ss_init(struct pcmcia_socket *s)
	64	{
	65	return 0;
	66	}
	67
	68	/* the timer is primarily to kick this socket's pccardd */
80c5a20b	69	static void electra_cf_timer(struct timer_list *t)
2b571a06	70	{
80c5a20b	71	struct electra_cf_socket *cf = from_timer(cf, t, timer);
2b571a06 OJ	72	int present = electra_cf_present(cf);
	73
	74	if (present != cf->present) {
	75	cf->present = present;
	76	pcmcia_parse_events(&cf->socket, SS_DETECT);
	77	}
	78
	79	if (cf->active)
	80	mod_timer(&cf->timer, jiffies + POLL_INTERVAL);
	81	}
	82
	83	static irqreturn_t electra_cf_irq(int irq, void *_cf)
	84	{
80c5a20b KC	85	struct electra_cf_socket *cf = _cf;
	86
	87	electra_cf_timer(&cf->timer);
2b571a06 OJ	88	return IRQ_HANDLED;
	89	}
	90
	91	static int electra_cf_get_status(struct pcmcia_socket s, u_int sp)
	92	{
	93	struct electra_cf_socket *cf;
	94
	95	if (!sp)
	96	return -EINVAL;
	97
	98	cf = container_of(s, struct electra_cf_socket, socket);
	99
	100	/* NOTE CF is always 3VCARD */
	101	if (electra_cf_present(cf)) {
	102	*sp = SS_READY \| SS_DETECT \| SS_POWERON \| SS_3VCARD;
	103
	104	s->pci_irq = cf->irq;
	105	} else
	106	*sp = 0;
	107	return 0;
	108	}
	109
	110	static int electra_cf_set_socket(struct pcmcia_socket *sock,
	111	struct socket_state_t *s)
	112	{
	113	unsigned int gpio;
	114	unsigned int vcc;
	115	struct electra_cf_socket *cf;
	116
	117	cf = container_of(sock, struct electra_cf_socket, socket);
	118
	119	/* "reset" means no power in our case */
	120	vcc = (s->flags & SS_RESET) ? 0 : s->Vcc;
	121
	122	switch (vcc) {
	123	case 0:
	124	gpio = 0;
	125	break;
	126	case 33:
	127	gpio = (1 << cf->gpio_3v);
	128	break;
	129	case 5:
	130	gpio = (1 << cf->gpio_5v);
	131	break;
	132	default:
	133	return -EINVAL;
	134	}
	135
	136	gpio \|= 1 << (cf->gpio_3v + 16); /* enwr */
	137	gpio \|= 1 << (cf->gpio_5v + 16); /* enwr */
	138	out_le32(cf->gpio_base+0x90, gpio);
	139
	140	pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
	141	driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
	142
	143	return 0;
	144	}
	145
	146	static int electra_cf_set_io_map(struct pcmcia_socket *s,
	147	struct pccard_io_map *io)
	148	{
	149	return 0;
	150	}
	151
152	static int electra_cf_set_mem_map(struct pcmcia_socket *s,
153	struct pccard_mem_map *map)
154	{
155	struct electra_cf_socket *cf;
156
157	if (map->card_start)
158	return -EINVAL;
159	cf = container_of(s, struct electra_cf_socket, socket);
160	map->static_start = cf->mem_phys;
161	map->flags &= MAP_ACTIVE\|MAP_ATTRIB;
162	if (!(map->flags & MAP_ATTRIB))
163	map->static_start += 0x800;
164	return 0;
165	}
166
167	static struct pccard_operations electra_cf_ops = {
168	.init = electra_cf_ss_init,
169	.get_status = electra_cf_get_status,
170	.set_socket = electra_cf_set_socket,
171	.set_io_map = electra_cf_set_io_map,
172	.set_mem_map = electra_cf_set_mem_map,
173	};
174
34cdf25a	175	static int electra_cf_probe(struct platform_device *ofdev)
2b571a06 OJ	176	{
2b571a06 OJ	177	struct device *device = &ofdev->dev;
61c7a080	178	struct device_node *np = ofdev->dev.of_node;
2b571a06 OJ	179	struct electra_cf_socket *cf;
	180	struct resource mem, io;
	181	int status;
	182	const unsigned int *prop;
	183	int err;
	184	struct vm_struct *area;
	185
	186	err = of_address_to_resource(np, 0, &mem);
	187	if (err)
	188	return -EINVAL;
	189
	190	err = of_address_to_resource(np, 1, &io);
	191	if (err)
	192	return -EINVAL;
	193
0f06abd3	194	cf = kzalloc(sizeof(*cf), GFP_KERNEL);
2b571a06 OJ	195	if (!cf)
	196	return -ENOMEM;
	197
80c5a20b	198	timer_setup(&cf->timer, electra_cf_timer, 0);
6c8343e8	199	cf->irq = 0;
2b571a06 OJ	200
	201	cf->ofdev = ofdev;
	202	cf->mem_phys = mem.start;
28f65c11	203	cf->mem_size = PAGE_ALIGN(resource_size(&mem));
2b571a06	204	cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
28f65c11	205	cf->io_size = PAGE_ALIGN(resource_size(&io));
2b571a06 OJ	206
2b571a06 OJ	207	area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END);
801421eb JL	208	if (area == NULL) {
	209	status = -ENOMEM;
	210	goto fail1;
	211	}
2b571a06 OJ	212
	213	cf->io_virt = (void __iomem *)(area->addr);
	214
	215	cf->gpio_base = ioremap(0xfc103000, 0x1000);
	216	dev_set_drvdata(device, cf);
	217
	218	if (!cf->mem_base \|\| !cf->io_virt \|\| !cf->gpio_base \|\|
	219	(__ioremap_at(io.start, cf->io_virt, cf->io_size,
c766ee72	220	pgprot_noncached(PAGE_KERNEL)) == NULL)) {
2b571a06 OJ	221	dev_err(device, "can't ioremap ranges\n");
	222	status = -ENOMEM;
	223	goto fail1;
	224	}
	225
	226
	227	cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
	228
	229	cf->iomem.start = (unsigned long)cf->mem_base;
	230	cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
	231	cf->iomem.flags = IORESOURCE_MEM;
	232
	233	cf->irq = irq_of_parse_and_map(np, 0);
	234
	235	status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
	236	driver_name, cf);
	237	if (status < 0) {
	238	dev_err(device, "request_irq failed\n");
	239	goto fail1;
	240	}
	241
	242	cf->socket.pci_irq = cf->irq;
	243
	244	prop = of_get_property(np, "card-detect-gpio", NULL);
	245	if (!prop)
	246	goto fail1;
	247	cf->gpio_detect = *prop;
	248
	249	prop = of_get_property(np, "card-vsense-gpio", NULL);
	250	if (!prop)
	251	goto fail1;
	252	cf->gpio_vsense = *prop;
	253
	254	prop = of_get_property(np, "card-3v-gpio", NULL);
	255	if (!prop)
	256	goto fail1;
	257	cf->gpio_3v = *prop;
	258
	259	prop = of_get_property(np, "card-5v-gpio", NULL);
	260	if (!prop)
	261	goto fail1;
	262	cf->gpio_5v = *prop;
	263
	264	cf->socket.io_offset = cf->io_base;
	265
	266	/* reserve chip-select regions */
	267	if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
	268	status = -ENXIO;
	269	dev_err(device, "Can't claim memory region\n");
	270	goto fail1;
	271	}
	272
	273	if (!request_region(cf->io_base, cf->io_size, driver_name)) {
	274	status = -ENXIO;
	275	dev_err(device, "Can't claim I/O region\n");
	276	goto fail2;
	277	}
	278
	279	cf->socket.owner = THIS_MODULE;
	280	cf->socket.dev.parent = &ofdev->dev;
	281	cf->socket.ops = &electra_cf_ops;
	282	cf->socket.resource_ops = &pccard_static_ops;
	283	cf->socket.features = SS_CAP_PCCARD \| SS_CAP_STATIC_MAP \|
	284	SS_CAP_MEM_ALIGN;
285	cf->socket.map_size = 0x800;
286
287	status = pcmcia_register_socket(&cf->socket);
288	if (status < 0) {
289	dev_err(device, "pcmcia_register_socket failed\n");
290	goto fail3;
291	}
292
fe333321	293	dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n",
2b571a06 OJ	294	cf->mem_phys, io.start, cf->irq);
	295
	296	cf->active = 1;
80c5a20b	297	electra_cf_timer(&cf->timer);
2b571a06 OJ	298	return 0;
	299
	300	fail3:
	301	release_region(cf->io_base, cf->io_size);
	302	fail2:
	303	release_mem_region(cf->mem_phys, cf->mem_size);
	304	fail1:
6c8343e8	305	if (cf->irq)
2b571a06 OJ	306	free_irq(cf->irq, cf);
	307
	308	if (cf->io_virt)
	309	__iounmap_at(cf->io_virt, cf->io_size);
	310	if (cf->mem_base)
	311	iounmap(cf->mem_base);
	312	if (cf->gpio_base)
	313	iounmap(cf->gpio_base);
801421eb JL	314	if (area)
801421eb JL	315	device_init_wakeup(&ofdev->dev, 0);
2b571a06 OJ	316	kfree(cf);
	317	return status;
	318
	319	}
	320
e765a02c	321	static int electra_cf_remove(struct platform_device *ofdev)
2b571a06 OJ	322	{
	323	struct device *device = &ofdev->dev;
	324	struct electra_cf_socket *cf;
	325
	326	cf = dev_get_drvdata(device);
	327
	328	cf->active = 0;
	329	pcmcia_unregister_socket(&cf->socket);
	330	free_irq(cf->irq, cf);
	331	del_timer_sync(&cf->timer);
	332
	333	__iounmap_at(cf->io_virt, cf->io_size);
	334	iounmap(cf->mem_base);
	335	iounmap(cf->gpio_base);
	336	release_mem_region(cf->mem_phys, cf->mem_size);
	337	release_region(cf->io_base, cf->io_size);
	338
	339	kfree(cf);
	340
	341	return 0;
	342	}
	343
63c9a8b3	344	static const struct of_device_id electra_cf_match[] = {
2b571a06 OJ	345	{
	346	.compatible = "electra-cf",
	347	},
	348	{},
	349	};
c433a1b6	350	MODULE_DEVICE_TABLE(of, electra_cf_match);
2b571a06	351
1c48a5c9	352	static struct platform_driver electra_cf_driver = {
4018294b	353	.driver = {
4455d9fd	354	.name = driver_name,
4018294b GL	355	.of_match_table = electra_cf_match,
4018294b GL	356	},
2b571a06 OJ	357	.probe = electra_cf_probe,
	358	.remove = electra_cf_remove,
	359	};
	360
5d95f8e2	361	module_platform_driver(electra_cf_driver);
2b571a06 OJ	362
2b571a06 OJ	363	MODULE_LICENSE("GPL");
0f06abd3	364	MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");
2b571a06	365	MODULE_DESCRIPTION("PA Semi Electra CF driver");