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> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/interrupt.h> | |
19 | ||
20 | #include <pcmcia/ss.h> | |
21 | ||
22 | #include <asm/hardware.h> | |
23 | #include <asm/io.h> | |
24 | #include <asm/sizes.h> | |
25 | ||
2c1f3b7a AV |
26 | #include <asm/arch/board.h> |
27 | #include <asm/arch/gpio.h> | |
55d8baee | 28 | #include <asm/arch/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 | ||
56 | #define SZ_2K (2 * SZ_1K) | |
57 | ||
58 | static inline int at91_cf_present(struct at91_cf_socket *cf) | |
59 | { | |
60 | return !at91_get_gpio_value(cf->board->det_pin); | |
61 | } | |
62 | ||
63 | /*--------------------------------------------------------------------------*/ | |
64 | ||
65 | static int at91_cf_ss_init(struct pcmcia_socket *s) | |
66 | { | |
67 | return 0; | |
68 | } | |
69 | ||
7d12e780 | 70 | static irqreturn_t at91_cf_irq(int irq, void *_cf) |
2c1f3b7a | 71 | { |
c7bec5ab | 72 | struct at91_cf_socket *cf = _cf; |
2c1f3b7a AV |
73 | |
74 | if (irq == cf->board->det_pin) { | |
75 | unsigned present = at91_cf_present(cf); | |
76 | ||
77 | /* kick pccard as needed */ | |
78 | if (present != cf->present) { | |
79 | cf->present = present; | |
2c536200 DB |
80 | pr_debug("%s: card %s\n", driver_name, |
81 | present ? "present" : "gone"); | |
2c1f3b7a AV |
82 | pcmcia_parse_events(&cf->socket, SS_DETECT); |
83 | } | |
84 | } | |
85 | ||
86 | return IRQ_HANDLED; | |
87 | } | |
88 | ||
89 | static int at91_cf_get_status(struct pcmcia_socket *s, u_int *sp) | |
90 | { | |
91 | struct at91_cf_socket *cf; | |
92 | ||
93 | if (!sp) | |
94 | return -EINVAL; | |
95 | ||
96 | cf = container_of(s, struct at91_cf_socket, socket); | |
97 | ||
2c536200 | 98 | /* NOTE: CF is always 3VCARD */ |
2c1f3b7a AV |
99 | if (at91_cf_present(cf)) { |
100 | int rdy = cf->board->irq_pin; /* RDY/nIRQ */ | |
101 | int vcc = cf->board->vcc_pin; | |
102 | ||
103 | *sp = SS_DETECT | SS_3VCARD; | |
104 | if (!rdy || at91_get_gpio_value(rdy)) | |
105 | *sp |= SS_READY; | |
106 | if (!vcc || at91_get_gpio_value(vcc)) | |
107 | *sp |= SS_POWERON; | |
108 | } else | |
109 | *sp = 0; | |
110 | ||
111 | return 0; | |
112 | } | |
113 | ||
2c536200 DB |
114 | static int |
115 | at91_cf_set_socket(struct pcmcia_socket *sock, struct socket_state_t *s) | |
2c1f3b7a AV |
116 | { |
117 | struct at91_cf_socket *cf; | |
118 | ||
119 | cf = container_of(sock, struct at91_cf_socket, socket); | |
120 | ||
121 | /* switch Vcc if needed and possible */ | |
122 | if (cf->board->vcc_pin) { | |
123 | switch (s->Vcc) { | |
124 | case 0: | |
125 | at91_set_gpio_value(cf->board->vcc_pin, 0); | |
126 | break; | |
127 | case 33: | |
128 | at91_set_gpio_value(cf->board->vcc_pin, 1); | |
129 | break; | |
130 | default: | |
131 | return -EINVAL; | |
132 | } | |
133 | } | |
134 | ||
135 | /* toggle reset if needed */ | |
136 | at91_set_gpio_value(cf->board->rst_pin, s->flags & SS_RESET); | |
137 | ||
138 | pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n", | |
139 | driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask); | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
144 | static int at91_cf_ss_suspend(struct pcmcia_socket *s) | |
145 | { | |
146 | return at91_cf_set_socket(s, &dead_socket); | |
147 | } | |
148 | ||
149 | /* we already mapped the I/O region */ | |
150 | static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io) | |
151 | { | |
152 | struct at91_cf_socket *cf; | |
153 | u32 csr; | |
154 | ||
155 | cf = container_of(s, struct at91_cf_socket, socket); | |
156 | io->flags &= (MAP_ACTIVE | MAP_16BIT | MAP_AUTOSZ); | |
157 | ||
158 | /* | |
159 | * Use 16 bit accesses unless/until we need 8-bit i/o space. | |
2c1f3b7a | 160 | */ |
40a0017e | 161 | csr = at91_sys_read(AT91_SMC_CSR(cf->board->chipselect)) & ~AT91_SMC_DBW; |
2c1f3b7a AV |
162 | |
163 | /* | |
164 | * NOTE: this CF controller ignores IOIS16, so we can't really do | |
165 | * MAP_AUTOSZ. The 16bit mode allows single byte access on either | |
166 | * D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many | |
167 | * purposes (and handles ide-cs). | |
168 | * | |
169 | * The 8bit mode is needed for odd byte access on D0-D7. It seems | |
170 | * some cards only like that way to get at the odd byte, despite | |
171 | * CF 3.0 spec table 35 also giving the D8-D15 option. | |
172 | */ | |
ebe5cfb3 | 173 | if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) { |
2c1f3b7a AV |
174 | csr |= AT91_SMC_DBW_8; |
175 | pr_debug("%s: 8bit i/o bus\n", driver_name); | |
176 | } else { | |
177 | csr |= AT91_SMC_DBW_16; | |
178 | pr_debug("%s: 16bit i/o bus\n", driver_name); | |
179 | } | |
40a0017e | 180 | at91_sys_write(AT91_SMC_CSR(cf->board->chipselect), csr); |
2c1f3b7a AV |
181 | |
182 | io->start = cf->socket.io_offset; | |
183 | io->stop = io->start + SZ_2K - 1; | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | /* pcmcia layer maps/unmaps mem regions */ | |
2c536200 DB |
189 | static int |
190 | at91_cf_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *map) | |
2c1f3b7a AV |
191 | { |
192 | struct at91_cf_socket *cf; | |
193 | ||
194 | if (map->card_start) | |
195 | return -EINVAL; | |
196 | ||
197 | cf = container_of(s, struct at91_cf_socket, socket); | |
198 | ||
ebe5cfb3 | 199 | map->flags &= (MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT); |
2c1f3b7a | 200 | if (map->flags & MAP_ATTRIB) |
ebe5cfb3 | 201 | map->static_start = cf->phys_baseaddr + CF_ATTR_PHYS; |
2c1f3b7a | 202 | else |
ebe5cfb3 | 203 | map->static_start = cf->phys_baseaddr + CF_MEM_PHYS; |
2c1f3b7a AV |
204 | |
205 | return 0; | |
206 | } | |
207 | ||
208 | static struct pccard_operations at91_cf_ops = { | |
209 | .init = at91_cf_ss_init, | |
210 | .suspend = at91_cf_ss_suspend, | |
211 | .get_status = at91_cf_get_status, | |
212 | .set_socket = at91_cf_set_socket, | |
213 | .set_io_map = at91_cf_set_io_map, | |
214 | .set_mem_map = at91_cf_set_mem_map, | |
215 | }; | |
216 | ||
217 | /*--------------------------------------------------------------------------*/ | |
218 | ||
0db6095d | 219 | static int __init at91_cf_probe(struct platform_device *pdev) |
2c1f3b7a AV |
220 | { |
221 | struct at91_cf_socket *cf; | |
0db6095d | 222 | struct at91_cf_data *board = pdev->dev.platform_data; |
2c536200 | 223 | struct resource *io; |
2c1f3b7a AV |
224 | int status; |
225 | ||
226 | if (!board || !board->det_pin || !board->rst_pin) | |
227 | return -ENODEV; | |
228 | ||
2c536200 DB |
229 | io = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
230 | if (!io) | |
231 | return -ENODEV; | |
232 | ||
cd861280 | 233 | cf = kzalloc(sizeof *cf, GFP_KERNEL); |
2c1f3b7a AV |
234 | if (!cf) |
235 | return -ENOMEM; | |
236 | ||
237 | cf->board = board; | |
238 | cf->pdev = pdev; | |
ebe5cfb3 | 239 | cf->phys_baseaddr = io->start; |
0db6095d | 240 | platform_set_drvdata(pdev, cf); |
2c1f3b7a | 241 | |
2c1f3b7a | 242 | /* must be a GPIO; ergo must trigger on both edges */ |
ebe5cfb3 | 243 | status = request_irq(board->det_pin, at91_cf_irq, 0, driver_name, cf); |
2c1f3b7a AV |
244 | if (status < 0) |
245 | goto fail0; | |
0db6095d | 246 | device_init_wakeup(&pdev->dev, 1); |
2c1f3b7a AV |
247 | |
248 | /* | |
249 | * The card driver will request this irq later as needed. | |
250 | * but it causes lots of "irqNN: nobody cared" messages | |
251 | * unless we report that we handle everything (sigh). | |
252 | * (Note: DK board doesn't wire the IRQ pin...) | |
253 | */ | |
254 | if (board->irq_pin) { | |
255 | status = request_irq(board->irq_pin, at91_cf_irq, | |
dace1453 | 256 | IRQF_SHARED, driver_name, cf); |
2c1f3b7a AV |
257 | if (status < 0) |
258 | goto fail0a; | |
259 | cf->socket.pci_irq = board->irq_pin; | |
2c536200 | 260 | } else |
2c1f3b7a AV |
261 | cf->socket.pci_irq = NR_IRQS + 1; |
262 | ||
263 | /* pcmcia layer only remaps "real" memory not iospace */ | |
ebe5cfb3 AV |
264 | cf->socket.io_offset = (unsigned long) ioremap(cf->phys_baseaddr + CF_IO_PHYS, SZ_2K); |
265 | if (!cf->socket.io_offset) { | |
266 | status = -ENXIO; | |
2c1f3b7a | 267 | goto fail1; |
ebe5cfb3 | 268 | } |
2c1f3b7a | 269 | |
40a0017e | 270 | /* reserve chip-select regions */ |
2c536200 | 271 | if (!request_mem_region(io->start, io->end + 1 - io->start, |
ebe5cfb3 AV |
272 | driver_name)) { |
273 | status = -ENXIO; | |
2c1f3b7a | 274 | goto fail1; |
ebe5cfb3 | 275 | } |
2c1f3b7a AV |
276 | |
277 | pr_info("%s: irqs det #%d, io #%d\n", driver_name, | |
278 | board->det_pin, board->irq_pin); | |
279 | ||
280 | cf->socket.owner = THIS_MODULE; | |
0db6095d | 281 | cf->socket.dev.dev = &pdev->dev; |
2c1f3b7a AV |
282 | cf->socket.ops = &at91_cf_ops; |
283 | cf->socket.resource_ops = &pccard_static_ops; | |
284 | cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP | |
285 | | SS_CAP_MEM_ALIGN; | |
286 | cf->socket.map_size = SZ_2K; | |
2c536200 | 287 | cf->socket.io[0].res = io; |
2c1f3b7a AV |
288 | |
289 | status = pcmcia_register_socket(&cf->socket); | |
290 | if (status < 0) | |
291 | goto fail2; | |
292 | ||
293 | return 0; | |
294 | ||
295 | fail2: | |
2c536200 | 296 | release_mem_region(io->start, io->end + 1 - io->start); |
2c1f3b7a | 297 | fail1: |
3efa9970 AL |
298 | if (cf->socket.io_offset) |
299 | iounmap((void __iomem *) cf->socket.io_offset); | |
2c1f3b7a AV |
300 | if (board->irq_pin) |
301 | free_irq(board->irq_pin, cf); | |
302 | fail0a: | |
1fbece15 | 303 | device_init_wakeup(&pdev->dev, 0); |
2c1f3b7a AV |
304 | free_irq(board->det_pin, cf); |
305 | fail0: | |
2c1f3b7a AV |
306 | kfree(cf); |
307 | return status; | |
308 | } | |
309 | ||
0db6095d | 310 | static int __exit at91_cf_remove(struct platform_device *pdev) |
2c1f3b7a | 311 | { |
0db6095d DB |
312 | struct at91_cf_socket *cf = platform_get_drvdata(pdev); |
313 | struct at91_cf_data *board = cf->board; | |
2c536200 | 314 | struct resource *io = cf->socket.io[0].res; |
2c1f3b7a AV |
315 | |
316 | pcmcia_unregister_socket(&cf->socket); | |
0db6095d DB |
317 | if (board->irq_pin) |
318 | free_irq(board->irq_pin, cf); | |
0db6095d | 319 | device_init_wakeup(&pdev->dev, 0); |
ebe5cfb3 | 320 | free_irq(board->det_pin, cf); |
2c1f3b7a | 321 | iounmap((void __iomem *) cf->socket.io_offset); |
2c536200 | 322 | release_mem_region(io->start, io->end + 1 - io->start); |
2c1f3b7a | 323 | |
2c1f3b7a AV |
324 | kfree(cf); |
325 | return 0; | |
326 | } | |
327 | ||
0db6095d DB |
328 | #ifdef CONFIG_PM |
329 | ||
330 | static int at91_cf_suspend(struct platform_device *pdev, pm_message_t mesg) | |
331 | { | |
332 | struct at91_cf_socket *cf = platform_get_drvdata(pdev); | |
333 | struct at91_cf_data *board = cf->board; | |
334 | ||
335 | pcmcia_socket_dev_suspend(&pdev->dev, mesg); | |
1fbece15 | 336 | if (device_may_wakeup(&pdev->dev)) { |
0db6095d | 337 | enable_irq_wake(board->det_pin); |
1fbece15 DB |
338 | if (board->irq_pin) |
339 | enable_irq_wake(board->irq_pin); | |
340 | } else { | |
0db6095d | 341 | disable_irq_wake(board->det_pin); |
1fbece15 DB |
342 | if (board->irq_pin) |
343 | disable_irq_wake(board->irq_pin); | |
0db6095d | 344 | } |
0db6095d DB |
345 | return 0; |
346 | } | |
347 | ||
348 | static int at91_cf_resume(struct platform_device *pdev) | |
349 | { | |
0db6095d DB |
350 | pcmcia_socket_dev_resume(&pdev->dev); |
351 | return 0; | |
352 | } | |
353 | ||
354 | #else | |
355 | #define at91_cf_suspend NULL | |
356 | #define at91_cf_resume NULL | |
357 | #endif | |
358 | ||
359 | static struct platform_driver at91_cf_driver = { | |
360 | .driver = { | |
361 | .name = (char *) driver_name, | |
362 | .owner = THIS_MODULE, | |
363 | }, | |
2c1f3b7a AV |
364 | .probe = at91_cf_probe, |
365 | .remove = __exit_p(at91_cf_remove), | |
0db6095d DB |
366 | .suspend = at91_cf_suspend, |
367 | .resume = at91_cf_resume, | |
2c1f3b7a AV |
368 | }; |
369 | ||
370 | /*--------------------------------------------------------------------------*/ | |
371 | ||
372 | static int __init at91_cf_init(void) | |
373 | { | |
0db6095d | 374 | return platform_driver_register(&at91_cf_driver); |
2c1f3b7a AV |
375 | } |
376 | module_init(at91_cf_init); | |
377 | ||
378 | static void __exit at91_cf_exit(void) | |
379 | { | |
0db6095d | 380 | platform_driver_unregister(&at91_cf_driver); |
2c1f3b7a AV |
381 | } |
382 | module_exit(at91_cf_exit); | |
383 | ||
384 | MODULE_DESCRIPTION("AT91 Compact Flash Driver"); | |
385 | MODULE_AUTHOR("David Brownell"); | |
386 | MODULE_LICENSE("GPL"); |