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> |
2c1f3b7a AV |
19 | |
20 | #include <pcmcia/ss.h> | |
21 | ||
a09e64fb | 22 | #include <mach/hardware.h> |
2c1f3b7a AV |
23 | #include <asm/io.h> |
24 | #include <asm/sizes.h> | |
4c1fc445 | 25 | #include <asm/gpio.h> |
2c1f3b7a | 26 | |
a09e64fb RK |
27 | #include <mach/board.h> |
28 | #include <mach/at91rm9200_mc.h> | |
2c1f3b7a AV |
29 | |
30 | ||
2c1f3b7a AV |
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. | |
ebe5cfb3 | 35 | * Note: These are offsets from the physical base address. |
2c1f3b7a | 36 | */ |
ebe5cfb3 AV |
37 | #define CF_ATTR_PHYS (0) |
38 | #define CF_IO_PHYS (1 << 23) | |
39 | #define CF_MEM_PHYS (0x017ff800) | |
2c1f3b7a AV |
40 | |
41 | /*--------------------------------------------------------------------------*/ | |
42 | ||
43 | static const char driver_name[] = "at91_cf"; | |
44 | ||
45 | struct 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; | |
ebe5cfb3 AV |
52 | |
53 | unsigned long phys_baseaddr; | |
2c1f3b7a AV |
54 | }; |
55 | ||
2c1f3b7a AV |
56 | static inline int at91_cf_present(struct at91_cf_socket *cf) |
57 | { | |
4c1fc445 | 58 | return !gpio_get_value(cf->board->det_pin); |
2c1f3b7a AV |
59 | } |
60 | ||
61 | /*--------------------------------------------------------------------------*/ | |
62 | ||
63 | static int at91_cf_ss_init(struct pcmcia_socket *s) | |
64 | { | |
65 | return 0; | |
66 | } | |
67 | ||
7d12e780 | 68 | static irqreturn_t at91_cf_irq(int irq, void *_cf) |
2c1f3b7a | 69 | { |
c7bec5ab | 70 | struct at91_cf_socket *cf = _cf; |
2c1f3b7a AV |
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; | |
2c536200 DB |
78 | pr_debug("%s: card %s\n", driver_name, |
79 | present ? "present" : "gone"); | |
2c1f3b7a AV |
80 | pcmcia_parse_events(&cf->socket, SS_DETECT); |
81 | } | |
82 | } | |
83 | ||
84 | return IRQ_HANDLED; | |
85 | } | |
86 | ||
87 | static 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 | ||
2c536200 | 96 | /* NOTE: CF is always 3VCARD */ |
2c1f3b7a AV |
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; | |
4c1fc445 | 102 | if (!rdy || gpio_get_value(rdy)) |
2c1f3b7a | 103 | *sp |= SS_READY; |
4c1fc445 | 104 | if (!vcc || gpio_get_value(vcc)) |
2c1f3b7a AV |
105 | *sp |= SS_POWERON; |
106 | } else | |
107 | *sp = 0; | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
2c536200 DB |
112 | static int |
113 | at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s) | |
2c1f3b7a AV |
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: | |
4c1fc445 | 123 | gpio_set_value(cf->board->vcc_pin, 0); |
2c1f3b7a AV |
124 | break; |
125 | case 33: | |
4c1fc445 | 126 | gpio_set_value(cf->board->vcc_pin, 1); |
2c1f3b7a AV |
127 | break; |
128 | default: | |
129 | return -EINVAL; | |
130 | } | |
131 | } | |
132 | ||
133 | /* toggle reset if needed */ | |
4c1fc445 | 134 | gpio_set_value(cf->board->rst_pin, s->flags & SS_RESET); |
2c1f3b7a AV |
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 | ||
142 | static 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 */ | |
148 | static 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. | |
2c1f3b7a | 158 | */ |
40a0017e | 159 | csr = at91_sys_read(AT91_SMC_CSR(cf->board->chipselect)) & ~AT91_SMC_DBW; |
2c1f3b7a AV |
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 | */ | |
ebe5cfb3 | 171 | if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) { |
2c1f3b7a AV |
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 | } | |
40a0017e | 178 | at91_sys_write(AT91_SMC_CSR(cf->board->chipselect), csr); |
2c1f3b7a AV |
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 */ | |
2c536200 DB |
187 | static int |
188 | at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map) | |
2c1f3b7a AV |
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 | ||
ebe5cfb3 | 197 | map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT); |
2c1f3b7a | 198 | if (map->flags & MAP_ATTRIB) |
ebe5cfb3 | 199 | map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS; |
2c1f3b7a | 200 | else |
ebe5cfb3 | 201 | map->static_start = cf->phys_baseaddr + CF_MEM_PHYS; |
2c1f3b7a AV |
202 | |
203 | return 0; | |
204 | } | |
205 | ||
206 | static 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 | ||
0db6095d | 217 | static int __init at91_cf_probe(struct platform_device *pdev) |
2c1f3b7a AV |
218 | { |
219 | struct at91_cf_socket *cf; | |
0db6095d | 220 | struct at91_cf_data *board = pdev->dev.platform_data; |
2c536200 | 221 | struct resource *io; |
2c1f3b7a AV |
222 | int status; |
223 | ||
224 | if (!board || !board->det_pin || !board->rst_pin) | |
225 | return -ENODEV; | |
226 | ||
2c536200 DB |
227 | io = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
228 | if (!io) | |
229 | return -ENODEV; | |
230 | ||
cd861280 | 231 | cf = kzalloc(sizeof *cf, GFP_KERNEL); |
2c1f3b7a AV |
232 | if (!cf) |
233 | return -ENOMEM; | |
234 | ||
235 | cf->board = board; | |
236 | cf->pdev = pdev; | |
ebe5cfb3 | 237 | cf->phys_baseaddr = io->start; |
0db6095d | 238 | platform_set_drvdata(pdev, cf); |
2c1f3b7a | 239 | |
2c1f3b7a | 240 | /* must be a GPIO; ergo must trigger on both edges */ |
4c1fc445 | 241 | status = gpio_request(board->det_pin, "cf_det"); |
2c1f3b7a AV |
242 | if (status < 0) |
243 | goto fail0; | |
4c1fc445 DB |
244 | status = request_irq(board->det_pin, at91_cf_irq, 0, driver_name, cf); |
245 | if (status < 0) | |
246 | goto fail00; | |
0db6095d | 247 | device_init_wakeup(&pdev->dev, 1); |
2c1f3b7a | 248 | |
4c1fc445 DB |
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 | ||
2c1f3b7a AV |
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) { | |
4c1fc445 DB |
266 | status = gpio_request(board->irq_pin, "cf_irq"); |
267 | if (status < 0) | |
268 | goto fail0c; | |
2c1f3b7a | 269 | status = request_irq(board->irq_pin, at91_cf_irq, |
dace1453 | 270 | IRQF_SHARED, driver_name, cf); |
2c1f3b7a | 271 | if (status < 0) |
4c1fc445 | 272 | goto fail0d; |
2c1f3b7a | 273 | cf->socket.pci_irq = board->irq_pin; |
2c536200 | 274 | } else |
9130adda | 275 | cf->socket.pci_irq = nr_irqs + 1; |
2c1f3b7a AV |
276 | |
277 | /* pcmcia layer only remaps "real" memory not iospace */ | |
4c1fc445 DB |
278 | cf->socket.io_offset = (unsigned long) |
279 | ioremap(cf->phys_baseaddr + CF_IO_PHYS, SZ_2K); | |
ebe5cfb3 AV |
280 | if (!cf->socket.io_offset) { |
281 | status = -ENXIO; | |
2c1f3b7a | 282 | goto fail1; |
ebe5cfb3 | 283 | } |
2c1f3b7a | 284 | |
40a0017e | 285 | /* reserve chip-select regions */ |
2c536200 | 286 | if (!request_mem_region(io->start, io->end + 1 - io->start, |
ebe5cfb3 AV |
287 | driver_name)) { |
288 | status = -ENXIO; | |
2c1f3b7a | 289 | goto fail1; |
ebe5cfb3 | 290 | } |
2c1f3b7a AV |
291 | |
292 | pr_info("%s: irqs det #%d, io #%d\n", driver_name, | |
293 | board->det_pin, board->irq_pin); | |
294 | ||
295 | cf->socket.owner = THIS_MODULE; | |
e4a3c3f0 | 296 | cf->socket.dev.parent = &pdev->dev; |
2c1f3b7a AV |
297 | cf->socket.ops = &at91_cf_ops; |
298 | cf->socket.resource_ops = &pccard_static_ops; | |
299 | cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP | |
300 | | SS_CAP_MEM_ALIGN; | |
301 | cf->socket.map_size = SZ_2K; | |
2c536200 | 302 | cf->socket.io[0].res = io; |
2c1f3b7a AV |
303 | |
304 | status = pcmcia_register_socket(&cf->socket); | |
305 | if (status < 0) | |
306 | goto fail2; | |
307 | ||
308 | return 0; | |
309 | ||
310 | fail2: | |
2c536200 | 311 | release_mem_region(io->start, io->end + 1 - io->start); |
2c1f3b7a | 312 | fail1: |
3efa9970 AL |
313 | if (cf->socket.io_offset) |
314 | iounmap((void __iomem *) cf->socket.io_offset); | |
4c1fc445 | 315 | if (board->irq_pin) { |
2c1f3b7a | 316 | free_irq(board->irq_pin, cf); |
4c1fc445 DB |
317 | fail0d: |
318 | gpio_free(board->irq_pin); | |
319 | } | |
320 | fail0c: | |
321 | if (board->vcc_pin) | |
322 | gpio_free(board->vcc_pin); | |
323 | fail0b: | |
324 | gpio_free(board->rst_pin); | |
2c1f3b7a | 325 | fail0a: |
1fbece15 | 326 | device_init_wakeup(&pdev->dev, 0); |
2c1f3b7a | 327 | free_irq(board->det_pin, cf); |
4c1fc445 DB |
328 | fail00: |
329 | gpio_free(board->det_pin); | |
2c1f3b7a | 330 | fail0: |
2c1f3b7a AV |
331 | kfree(cf); |
332 | return status; | |
333 | } | |
334 | ||
0db6095d | 335 | static int __exit at91_cf_remove(struct platform_device *pdev) |
2c1f3b7a | 336 | { |
0db6095d DB |
337 | struct at91_cf_socket *cf = platform_get_drvdata(pdev); |
338 | struct at91_cf_data *board = cf->board; | |
2c536200 | 339 | struct resource *io = cf->socket.io[0].res; |
2c1f3b7a AV |
340 | |
341 | pcmcia_unregister_socket(&cf->socket); | |
4c1fc445 DB |
342 | release_mem_region(io->start, io->end + 1 - io->start); |
343 | iounmap((void __iomem *) cf->socket.io_offset); | |
344 | if (board->irq_pin) { | |
0db6095d | 345 | free_irq(board->irq_pin, cf); |
4c1fc445 DB |
346 | gpio_free(board->irq_pin); |
347 | } | |
348 | if (board->vcc_pin) | |
349 | gpio_free(board->vcc_pin); | |
350 | gpio_free(board->rst_pin); | |
0db6095d | 351 | device_init_wakeup(&pdev->dev, 0); |
ebe5cfb3 | 352 | free_irq(board->det_pin, cf); |
4c1fc445 | 353 | gpio_free(board->det_pin); |
2c1f3b7a AV |
354 | kfree(cf); |
355 | return 0; | |
356 | } | |
357 | ||
0db6095d DB |
358 | #ifdef CONFIG_PM |
359 | ||
360 | static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg) | |
361 | { | |
362 | struct at91_cf_socket *cf = platform_get_drvdata(pdev); | |
363 | struct at91_cf_data *board = cf->board; | |
364 | ||
1fbece15 | 365 | if (device_may_wakeup(&pdev->dev)) { |
0db6095d | 366 | enable_irq_wake(board->det_pin); |
1fbece15 DB |
367 | if (board->irq_pin) |
368 | enable_irq_wake(board->irq_pin); | |
0db6095d | 369 | } |
0db6095d DB |
370 | return 0; |
371 | } | |
372 | ||
373 | static int at91_cf_resume(struct platform_device *pdev) | |
374 | { | |
9af20376 MP |
375 | struct at91_cf_socket *cf = platform_get_drvdata(pdev); |
376 | struct at91_cf_data *board = cf->board; | |
377 | ||
378 | if (device_may_wakeup(&pdev->dev)) { | |
379 | disable_irq_wake(board->det_pin); | |
380 | if (board->irq_pin) | |
381 | disable_irq_wake(board->irq_pin); | |
382 | } | |
383 | ||
0db6095d DB |
384 | return 0; |
385 | } | |
386 | ||
387 | #else | |
388 | #define at91_cf_suspend NULL | |
389 | #define at91_cf_resume NULL | |
390 | #endif | |
391 | ||
392 | static struct platform_driver at91_cf_driver = { | |
393 | .driver = { | |
394 | .name = (char *) driver_name, | |
395 | .owner = THIS_MODULE, | |
396 | }, | |
2c1f3b7a | 397 | .remove = __exit_p(at91_cf_remove), |
0db6095d DB |
398 | .suspend = at91_cf_suspend, |
399 | .resume = at91_cf_resume, | |
2c1f3b7a AV |
400 | }; |
401 | ||
402 | /*--------------------------------------------------------------------------*/ | |
403 | ||
404 | static int __init at91_cf_init(void) | |
405 | { | |
02c83595 | 406 | return platform_driver_probe(&at91_cf_driver, at91_cf_probe); |
2c1f3b7a AV |
407 | } |
408 | module_init(at91_cf_init); | |
409 | ||
410 | static void __exit at91_cf_exit(void) | |
411 | { | |
0db6095d | 412 | platform_driver_unregister(&at91_cf_driver); |
2c1f3b7a AV |
413 | } |
414 | module_exit(at91_cf_exit); | |
415 | ||
416 | MODULE_DESCRIPTION("AT91 Compact Flash Driver"); | |
417 | MODULE_AUTHOR("David Brownell"); | |
418 | MODULE_LICENSE("GPL"); | |
12c2c019 | 419 | MODULE_ALIAS("platform:at91_cf"); |