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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>
14#include <linux/platform_device.h>
15#include <linux/errno.h>
16#include <linux/init.h>
17#include <linux/interrupt.h>
18#include <linux/slab.h>
19
20#include <pcmcia/ss.h>
21
22#include <mach/hardware.h>
23#include <asm/io.h>
24#include <asm/sizes.h>
25#include <asm/gpio.h>
26
27#include <mach/board.h>
28#include <mach/at91rm9200_mc.h>
29
30
31/*
32 * A0..A10 work in each range; A23 indicates I/O space; A25 is CFRNW;
33 * some other bit in {A24,A22..A11} is nREG to flag memory access
34 * (vs attributes). So more than 2KB/region would just be waste.
35 * Note: These are offsets from the physical base address.
36 */
37#define CF_ATTR_PHYS (0)
38#define CF_IO_PHYS (1 << 23)
39#define CF_MEM_PHYS (0x017ff800)
40
41/*--------------------------------------------------------------------------*/
42
43static const char driver_name[] = "at91_cf";
44
45struct at91_cf_socket {
46 struct pcmcia_socket socket;
47
48 unsigned present:1;
49
50 struct platform_device *pdev;
51 struct at91_cf_data *board;
52
53 unsigned long phys_baseaddr;
54};
55
56static inline int at91_cf_present(struct at91_cf_socket *cf)
57{
58 return !gpio_get_value(cf->board->det_pin);
59}
60
61/*--------------------------------------------------------------------------*/
62
63static int at91_cf_ss_init(struct pcmcia_socket *s)
64{
65 return 0;
66}
67
68static irqreturn_t at91_cf_irq(int irq, void *_cf)
69{
70 struct at91_cf_socket *cf = _cf;
71
72 if (irq == cf->board->det_pin) {
73 unsigned present = at91_cf_present(cf);
74
75 /* kick pccard as needed */
76 if (present != cf->present) {
77 cf->present = present;
78 pr_debug("%s: card %s\n", driver_name,
79 present ? "present" : "gone");
80 pcmcia_parse_events(&cf->socket, SS_DETECT);
81 }
82 }
83
84 return IRQ_HANDLED;
85}
86
87static int at91_cf_get_status(struct pcmcia_socket *s, u_int *sp)
88{
89 struct at91_cf_socket *cf;
90
91 if (!sp)
92 return -EINVAL;
93
94 cf = container_of(s, struct at91_cf_socket, socket);
95
96 /* NOTE: CF is always 3VCARD */
97 if (at91_cf_present(cf)) {
98 int rdy = cf->board->irq_pin; /* RDY/nIRQ */
99 int vcc = cf->board->vcc_pin;
100
101 *sp = SS_DETECT | SS_3VCARD;
102 if (!rdy || gpio_get_value(rdy))
103 *sp |= SS_READY;
104 if (!vcc || gpio_get_value(vcc))
105 *sp |= SS_POWERON;
106 } else
107 *sp = 0;
108
109 return 0;
110}
111
112static int
113at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
114{
115 struct at91_cf_socket *cf;
116
117 cf = container_of(sock, struct at91_cf_socket, socket);
118
119 /* switch Vcc if needed and possible */
120 if (cf->board->vcc_pin) {
121 switch (s->Vcc) {
122 case 0:
123 gpio_set_value(cf->board->vcc_pin, 0);
124 break;
125 case 33:
126 gpio_set_value(cf->board->vcc_pin, 1);
127 break;
128 default:
129 return -EINVAL;
130 }
131 }
132
133 /* toggle reset if needed */
134 gpio_set_value(cf->board->rst_pin, s->flags & SS_RESET);
135
136 pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n",
137 driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask);
138
139 return 0;
140}
141
142static int at91_cf_ss_suspend(struct pcmcia_socket *s)
143{
144 return at91_cf_set_socket(s, &dead_socket);
145}
146
147/* we already mapped the I/O region */
148static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
149{
150 struct at91_cf_socket *cf;
151 u32 csr;
152
153 cf = container_of(s, struct at91_cf_socket, socket);
154 io->flags &= (MAP_ACTIVE | MAP_16BIT | MAP_AUTOSZ);
155
156 /*
157 * Use 16 bit accesses unless/until we need 8-bit i/o space.
158 */
159 csr = at91_sys_read(AT91_SMC_CSR(cf->board->chipselect)) & ~AT91_SMC_DBW;
160
161 /*
162 * NOTE: this CF controller ignores IOIS16, so we can't really do
163 * MAP_AUTOSZ. The 16bit mode allows single byte access on either
164 * D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many
165 * purposes (and handles ide-cs).
166 *
167 * The 8bit mode is needed for odd byte access on D0-D7. It seems
168 * some cards only like that way to get at the odd byte, despite
169 * CF 3.0 spec table 35 also giving the D8-D15 option.
170 */
171 if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) {
172 csr |= AT91_SMC_DBW_8;
173 pr_debug("%s: 8bit i/o bus\n", driver_name);
174 } else {
175 csr |= AT91_SMC_DBW_16;
176 pr_debug("%s: 16bit i/o bus\n", driver_name);
177 }
178 at91_sys_write(AT91_SMC_CSR(cf->board->chipselect), csr);
179
180 io->start = cf->socket.io_offset;
181 io->stop = io->start + SZ_2K - 1;
182
183 return 0;
184}
185
186/* pcmcia layer maps/unmaps mem regions */
187static int
188at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
189{
190 struct at91_cf_socket *cf;
191
192 if (map->card_start)
193 return -EINVAL;
194
195 cf = container_of(s, struct at91_cf_socket, socket);
196
197 map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT);
198 if (map->flags & MAP_ATTRIB)
199 map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS;
200 else
201 map->static_start = cf->phys_baseaddr + CF_MEM_PHYS;
202
203 return 0;
204}
205
206static struct pccard_operations at91_cf_ops = {
207 .init = at91_cf_ss_init,
208 .suspend = at91_cf_ss_suspend,
209 .get_status = at91_cf_get_status,
210 .set_socket = at91_cf_set_socket,
211 .set_io_map = at91_cf_set_io_map,
212 .set_mem_map = at91_cf_set_mem_map,
213};
214
215/*--------------------------------------------------------------------------*/
216
217static int __init at91_cf_probe(struct platform_device *pdev)
218{
219 struct at91_cf_socket *cf;
220 struct at91_cf_data *board = pdev->dev.platform_data;
221 struct resource *io;
222 int status;
223
224 if (!board || !board->det_pin || !board->rst_pin)
225 return -ENODEV;
226
227 io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
228 if (!io)
229 return -ENODEV;
230
231 cf = kzalloc(sizeof *cf, GFP_KERNEL);
232 if (!cf)
233 return -ENOMEM;
234
235 cf->board = board;
236 cf->pdev = pdev;
237 cf->phys_baseaddr = io->start;
238 platform_set_drvdata(pdev, cf);
239
240 /* must be a GPIO; ergo must trigger on both edges */
241 status = gpio_request(board->det_pin, "cf_det");
242 if (status < 0)
243 goto fail0;
244 status = request_irq(board->det_pin, at91_cf_irq, 0, driver_name, cf);
245 if (status < 0)
246 goto fail00;
247 device_init_wakeup(&pdev->dev, 1);
248
249 status = gpio_request(board->rst_pin, "cf_rst");
250 if (status < 0)
251 goto fail0a;
252
253 if (board->vcc_pin) {
254 status = gpio_request(board->vcc_pin, "cf_vcc");
255 if (status < 0)
256 goto fail0b;
257 }
258
259 /*
260 * The card driver will request this irq later as needed.
261 * but it causes lots of "irqNN: nobody cared" messages
262 * unless we report that we handle everything (sigh).
263 * (Note: DK board doesn't wire the IRQ pin...)
264 */
265 if (board->irq_pin) {
266 status = gpio_request(board->irq_pin, "cf_irq");
267 if (status < 0)
268 goto fail0c;
269 status = request_irq(board->irq_pin, at91_cf_irq,
270 IRQF_SHARED, driver_name, cf);
271 if (status < 0)
272 goto fail0d;
273 cf->socket.pci_irq = board->irq_pin;
274 } else
275 cf->socket.pci_irq = nr_irqs + 1;
276
277 /* pcmcia layer only remaps "real" memory not iospace */
278 cf->socket.io_offset = (unsigned long)
279 ioremap(cf->phys_baseaddr + CF_IO_PHYS, SZ_2K);
280 if (!cf->socket.io_offset) {
281 status = -ENXIO;
282 goto fail1;
283 }
284
285 /* reserve chip-select regions */
286 if (!request_mem_region(io->start, resource_size(io), driver_name)) {
287 status = -ENXIO;
288 goto fail1;
289 }
290
291 pr_info("%s: irqs det #%d, io #%d\n", driver_name,
292 board->det_pin, board->irq_pin);
293
294 cf->socket.owner = THIS_MODULE;
295 cf->socket.dev.parent = &pdev->dev;
296 cf->socket.ops = &at91_cf_ops;
297 cf->socket.resource_ops = &pccard_static_ops;
298 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP
299 | SS_CAP_MEM_ALIGN;
300 cf->socket.map_size = SZ_2K;
301 cf->socket.io[0].res = io;
302
303 status = pcmcia_register_socket(&cf->socket);
304 if (status < 0)
305 goto fail2;
306
307 return 0;
308
309fail2:
310 release_mem_region(io->start, resource_size(io));
311fail1:
312 if (cf->socket.io_offset)
313 iounmap((void __iomem *) cf->socket.io_offset);
314 if (board->irq_pin) {
315 free_irq(board->irq_pin, cf);
316fail0d:
317 gpio_free(board->irq_pin);
318 }
319fail0c:
320 if (board->vcc_pin)
321 gpio_free(board->vcc_pin);
322fail0b:
323 gpio_free(board->rst_pin);
324fail0a:
325 device_init_wakeup(&pdev->dev, 0);
326 free_irq(board->det_pin, cf);
327fail00:
328 gpio_free(board->det_pin);
329fail0:
330 kfree(cf);
331 return status;
332}
333
334static int __exit at91_cf_remove(struct platform_device *pdev)
335{
336 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
337 struct at91_cf_data *board = cf->board;
338 struct resource *io = cf->socket.io[0].res;
339
340 pcmcia_unregister_socket(&cf->socket);
341 release_mem_region(io->start, resource_size(io));
342 iounmap((void __iomem *) cf->socket.io_offset);
343 if (board->irq_pin) {
344 free_irq(board->irq_pin, cf);
345 gpio_free(board->irq_pin);
346 }
347 if (board->vcc_pin)
348 gpio_free(board->vcc_pin);
349 gpio_free(board->rst_pin);
350 device_init_wakeup(&pdev->dev, 0);
351 free_irq(board->det_pin, cf);
352 gpio_free(board->det_pin);
353 kfree(cf);
354 return 0;
355}
356
357#ifdef CONFIG_PM
358
359static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
360{
361 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
362 struct at91_cf_data *board = cf->board;
363
364 if (device_may_wakeup(&pdev->dev)) {
365 enable_irq_wake(board->det_pin);
366 if (board->irq_pin)
367 enable_irq_wake(board->irq_pin);
368 }
369 return 0;
370}
371
372static int at91_cf_resume(struct platform_device *pdev)
373{
374 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
375 struct at91_cf_data *board = cf->board;
376
377 if (device_may_wakeup(&pdev->dev)) {
378 disable_irq_wake(board->det_pin);
379 if (board->irq_pin)
380 disable_irq_wake(board->irq_pin);
381 }
382
383 return 0;
384}
385
386#else
387#define at91_cf_suspend NULL
388#define at91_cf_resume NULL
389#endif
390
391static struct platform_driver at91_cf_driver = {
392 .driver = {
393 .name = (char *) driver_name,
394 .owner = THIS_MODULE,
395 },
396 .remove = __exit_p(at91_cf_remove),
397 .suspend = at91_cf_suspend,
398 .resume = at91_cf_resume,
399};
400
401/*--------------------------------------------------------------------------*/
402
403static int __init at91_cf_init(void)
404{
405 return platform_driver_probe(&at91_cf_driver, at91_cf_probe);
406}
407module_init(at91_cf_init);
408
409static void __exit at91_cf_exit(void)
410{
411 platform_driver_unregister(&at91_cf_driver);
412}
413module_exit(at91_cf_exit);
414
415MODULE_DESCRIPTION("AT91 Compact Flash Driver");
416MODULE_AUTHOR("David Brownell");
417MODULE_LICENSE("GPL");
418MODULE_ALIAS("platform:at91_cf");
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * at91_cf.c -- AT91 CompactFlash controller driver
4 *
5 * Copyright (C) 2005 David Brownell
6 */
7
8#include <linux/module.h>
9#include <linux/kernel.h>
10#include <linux/platform_device.h>
11#include <linux/errno.h>
12#include <linux/init.h>
13#include <linux/interrupt.h>
14#include <linux/slab.h>
15#include <linux/gpio.h>
16#include <linux/io.h>
17#include <linux/sizes.h>
18#include <linux/mfd/syscon.h>
19#include <linux/mfd/syscon/atmel-mc.h>
20#include <linux/of.h>
21#include <linux/of_device.h>
22#include <linux/of_gpio.h>
23#include <linux/regmap.h>
24
25#include <pcmcia/ss.h>
26
27/*
28 * A0..A10 work in each range; A23 indicates I/O space; A25 is CFRNW;
29 * some other bit in {A24,A22..A11} is nREG to flag memory access
30 * (vs attributes). So more than 2KB/region would just be waste.
31 * Note: These are offsets from the physical base address.
32 */
33#define CF_ATTR_PHYS (0)
34#define CF_IO_PHYS (1 << 23)
35#define CF_MEM_PHYS (0x017ff800)
36
37struct at91_cf_data {
38 int irq_pin; /* I/O IRQ */
39 int det_pin; /* Card detect */
40 int vcc_pin; /* power switching */
41 int rst_pin; /* card reset */
42 u8 chipselect; /* EBI Chip Select number */
43 u8 flags;
44#define AT91_CF_TRUE_IDE 0x01
45#define AT91_IDE_SWAP_A0_A2 0x02
46};
47
48struct regmap *mc;
49
50/*--------------------------------------------------------------------------*/
51
52struct at91_cf_socket {
53 struct pcmcia_socket socket;
54
55 unsigned present:1;
56
57 struct platform_device *pdev;
58 struct at91_cf_data *board;
59
60 unsigned long phys_baseaddr;
61};
62
63static inline int at91_cf_present(struct at91_cf_socket *cf)
64{
65 return !gpio_get_value(cf->board->det_pin);
66}
67
68/*--------------------------------------------------------------------------*/
69
70static int at91_cf_ss_init(struct pcmcia_socket *s)
71{
72 return 0;
73}
74
75static irqreturn_t at91_cf_irq(int irq, void *_cf)
76{
77 struct at91_cf_socket *cf = _cf;
78
79 if (irq == gpio_to_irq(cf->board->det_pin)) {
80 unsigned present = at91_cf_present(cf);
81
82 /* kick pccard as needed */
83 if (present != cf->present) {
84 cf->present = present;
85 dev_dbg(&cf->pdev->dev, "card %s\n",
86 present ? "present" : "gone");
87 pcmcia_parse_events(&cf->socket, SS_DETECT);
88 }
89 }
90
91 return IRQ_HANDLED;
92}
93
94static int at91_cf_get_status(struct pcmcia_socket *s, u_int *sp)
95{
96 struct at91_cf_socket *cf;
97
98 if (!sp)
99 return -EINVAL;
100
101 cf = container_of(s, struct at91_cf_socket, socket);
102
103 /* NOTE: CF is always 3VCARD */
104 if (at91_cf_present(cf)) {
105 int rdy = gpio_is_valid(cf->board->irq_pin); /* RDY/nIRQ */
106 int vcc = gpio_is_valid(cf->board->vcc_pin);
107
108 *sp = SS_DETECT | SS_3VCARD;
109 if (!rdy || gpio_get_value(cf->board->irq_pin))
110 *sp |= SS_READY;
111 if (!vcc || gpio_get_value(cf->board->vcc_pin))
112 *sp |= SS_POWERON;
113 } else
114 *sp = 0;
115
116 return 0;
117}
118
119static int
120at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s)
121{
122 struct at91_cf_socket *cf;
123
124 cf = container_of(sock, struct at91_cf_socket, socket);
125
126 /* switch Vcc if needed and possible */
127 if (gpio_is_valid(cf->board->vcc_pin)) {
128 switch (s->Vcc) {
129 case 0:
130 gpio_set_value(cf->board->vcc_pin, 0);
131 break;
132 case 33:
133 gpio_set_value(cf->board->vcc_pin, 1);
134 break;
135 default:
136 return -EINVAL;
137 }
138 }
139
140 /* toggle reset if needed */
141 gpio_set_value(cf->board->rst_pin, s->flags & SS_RESET);
142
143 dev_dbg(&cf->pdev->dev, "Vcc %d, io_irq %d, flags %04x csc %04x\n",
144 s->Vcc, s->io_irq, s->flags, s->csc_mask);
145
146 return 0;
147}
148
149static int at91_cf_ss_suspend(struct pcmcia_socket *s)
150{
151 return at91_cf_set_socket(s, &dead_socket);
152}
153
154/* we already mapped the I/O region */
155static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
156{
157 struct at91_cf_socket *cf;
158 u32 csr;
159
160 cf = container_of(s, struct at91_cf_socket, socket);
161 io->flags &= (MAP_ACTIVE | MAP_16BIT | MAP_AUTOSZ);
162
163 /*
164 * Use 16 bit accesses unless/until we need 8-bit i/o space.
165 *
166 * NOTE: this CF controller ignores IOIS16, so we can't really do
167 * MAP_AUTOSZ. The 16bit mode allows single byte access on either
168 * D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many
169 * purposes (and handles ide-cs).
170 *
171 * The 8bit mode is needed for odd byte access on D0-D7. It seems
172 * some cards only like that way to get at the odd byte, despite
173 * CF 3.0 spec table 35 also giving the D8-D15 option.
174 */
175 if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) {
176 csr = AT91_MC_SMC_DBW_8;
177 dev_dbg(&cf->pdev->dev, "8bit i/o bus\n");
178 } else {
179 csr = AT91_MC_SMC_DBW_16;
180 dev_dbg(&cf->pdev->dev, "16bit i/o bus\n");
181 }
182 regmap_update_bits(mc, AT91_MC_SMC_CSR(cf->board->chipselect),
183 AT91_MC_SMC_DBW, csr);
184
185 io->start = cf->socket.io_offset;
186 io->stop = io->start + SZ_2K - 1;
187
188 return 0;
189}
190
191/* pcmcia layer maps/unmaps mem regions */
192static int
193at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map)
194{
195 struct at91_cf_socket *cf;
196
197 if (map->card_start)
198 return -EINVAL;
199
200 cf = container_of(s, struct at91_cf_socket, socket);
201
202 map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT);
203 if (map->flags & MAP_ATTRIB)
204 map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS;
205 else
206 map->static_start = cf->phys_baseaddr + CF_MEM_PHYS;
207
208 return 0;
209}
210
211static struct pccard_operations at91_cf_ops = {
212 .init = at91_cf_ss_init,
213 .suspend = at91_cf_ss_suspend,
214 .get_status = at91_cf_get_status,
215 .set_socket = at91_cf_set_socket,
216 .set_io_map = at91_cf_set_io_map,
217 .set_mem_map = at91_cf_set_mem_map,
218};
219
220/*--------------------------------------------------------------------------*/
221
222static const struct of_device_id at91_cf_dt_ids[] = {
223 { .compatible = "atmel,at91rm9200-cf" },
224 { /* sentinel */ }
225};
226MODULE_DEVICE_TABLE(of, at91_cf_dt_ids);
227
228static int at91_cf_probe(struct platform_device *pdev)
229{
230 struct at91_cf_socket *cf;
231 struct at91_cf_data *board;
232 struct resource *io;
233 int status;
234
235 board = devm_kzalloc(&pdev->dev, sizeof(*board), GFP_KERNEL);
236 if (!board)
237 return -ENOMEM;
238
239 board->irq_pin = of_get_gpio(pdev->dev.of_node, 0);
240 board->det_pin = of_get_gpio(pdev->dev.of_node, 1);
241 board->vcc_pin = of_get_gpio(pdev->dev.of_node, 2);
242 board->rst_pin = of_get_gpio(pdev->dev.of_node, 3);
243
244 mc = syscon_regmap_lookup_by_compatible("atmel,at91rm9200-sdramc");
245 if (IS_ERR(mc))
246 return PTR_ERR(mc);
247
248 if (!gpio_is_valid(board->det_pin) || !gpio_is_valid(board->rst_pin))
249 return -ENODEV;
250
251 io = platform_get_resource(pdev, IORESOURCE_MEM, 0);
252 if (!io)
253 return -ENODEV;
254
255 cf = devm_kzalloc(&pdev->dev, sizeof(*cf), GFP_KERNEL);
256 if (!cf)
257 return -ENOMEM;
258
259 cf->board = board;
260 cf->pdev = pdev;
261 cf->phys_baseaddr = io->start;
262 platform_set_drvdata(pdev, cf);
263
264 /* must be a GPIO; ergo must trigger on both edges */
265 status = devm_gpio_request(&pdev->dev, board->det_pin, "cf_det");
266 if (status < 0)
267 return status;
268
269 status = devm_request_irq(&pdev->dev, gpio_to_irq(board->det_pin),
270 at91_cf_irq, 0, "at91_cf detect", cf);
271 if (status < 0)
272 return status;
273
274 device_init_wakeup(&pdev->dev, 1);
275
276 status = devm_gpio_request(&pdev->dev, board->rst_pin, "cf_rst");
277 if (status < 0)
278 goto fail0a;
279
280 if (gpio_is_valid(board->vcc_pin)) {
281 status = devm_gpio_request(&pdev->dev, board->vcc_pin, "cf_vcc");
282 if (status < 0)
283 goto fail0a;
284 }
285
286 /*
287 * The card driver will request this irq later as needed.
288 * but it causes lots of "irqNN: nobody cared" messages
289 * unless we report that we handle everything (sigh).
290 * (Note: DK board doesn't wire the IRQ pin...)
291 */
292 if (gpio_is_valid(board->irq_pin)) {
293 status = devm_gpio_request(&pdev->dev, board->irq_pin, "cf_irq");
294 if (status < 0)
295 goto fail0a;
296
297 status = devm_request_irq(&pdev->dev, gpio_to_irq(board->irq_pin),
298 at91_cf_irq, IRQF_SHARED, "at91_cf", cf);
299 if (status < 0)
300 goto fail0a;
301 cf->socket.pci_irq = gpio_to_irq(board->irq_pin);
302 } else
303 cf->socket.pci_irq = nr_irqs + 1;
304
305 /*
306 * pcmcia layer only remaps "real" memory not iospace
307 * io_offset is set to 0x10000 to avoid the check in static_find_io().
308 * */
309 cf->socket.io_offset = 0x10000;
310 status = pci_ioremap_io(0x10000, cf->phys_baseaddr + CF_IO_PHYS);
311 if (status)
312 goto fail0a;
313
314 /* reserve chip-select regions */
315 if (!devm_request_mem_region(&pdev->dev, io->start, resource_size(io), "at91_cf")) {
316 status = -ENXIO;
317 goto fail0a;
318 }
319
320 dev_info(&pdev->dev, "irqs det #%d, io #%d\n",
321 gpio_to_irq(board->det_pin), gpio_to_irq(board->irq_pin));
322
323 cf->socket.owner = THIS_MODULE;
324 cf->socket.dev.parent = &pdev->dev;
325 cf->socket.ops = &at91_cf_ops;
326 cf->socket.resource_ops = &pccard_static_ops;
327 cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP
328 | SS_CAP_MEM_ALIGN;
329 cf->socket.map_size = SZ_2K;
330 cf->socket.io[0].res = io;
331
332 status = pcmcia_register_socket(&cf->socket);
333 if (status < 0)
334 goto fail0a;
335
336 return 0;
337
338fail0a:
339 device_init_wakeup(&pdev->dev, 0);
340 return status;
341}
342
343static int at91_cf_remove(struct platform_device *pdev)
344{
345 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
346
347 pcmcia_unregister_socket(&cf->socket);
348 device_init_wakeup(&pdev->dev, 0);
349
350 return 0;
351}
352
353#ifdef CONFIG_PM
354
355static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg)
356{
357 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
358 struct at91_cf_data *board = cf->board;
359
360 if (device_may_wakeup(&pdev->dev)) {
361 enable_irq_wake(gpio_to_irq(board->det_pin));
362 if (gpio_is_valid(board->irq_pin))
363 enable_irq_wake(gpio_to_irq(board->irq_pin));
364 }
365 return 0;
366}
367
368static int at91_cf_resume(struct platform_device *pdev)
369{
370 struct at91_cf_socket *cf = platform_get_drvdata(pdev);
371 struct at91_cf_data *board = cf->board;
372
373 if (device_may_wakeup(&pdev->dev)) {
374 disable_irq_wake(gpio_to_irq(board->det_pin));
375 if (gpio_is_valid(board->irq_pin))
376 disable_irq_wake(gpio_to_irq(board->irq_pin));
377 }
378
379 return 0;
380}
381
382#else
383#define at91_cf_suspend NULL
384#define at91_cf_resume NULL
385#endif
386
387static struct platform_driver at91_cf_driver = {
388 .driver = {
389 .name = "at91_cf",
390 .of_match_table = at91_cf_dt_ids,
391 },
392 .probe = at91_cf_probe,
393 .remove = at91_cf_remove,
394 .suspend = at91_cf_suspend,
395 .resume = at91_cf_resume,
396};
397
398module_platform_driver(at91_cf_driver);
399
400MODULE_DESCRIPTION("AT91 Compact Flash Driver");
401MODULE_AUTHOR("David Brownell");
402MODULE_LICENSE("GPL");
403MODULE_ALIAS("platform:at91_cf");