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65dbf343 | 1 | /* |
99eeb8df | 2 | * linux/drivers/mmc/at91_mci.c - ATMEL AT91 MCI Driver |
65dbf343 AV |
3 | * |
4 | * Copyright (C) 2005 Cougar Creek Computing Devices Ltd, All Rights Reserved | |
5 | * | |
6 | * Copyright (C) 2006 Malcolm Noyes | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | /* | |
99eeb8df | 14 | This is the AT91 MCI driver that has been tested with both MMC cards |
65dbf343 AV |
15 | and SD-cards. Boards that support write protect are now supported. |
16 | The CCAT91SBC001 board does not support SD cards. | |
17 | ||
18 | The three entry points are at91_mci_request, at91_mci_set_ios | |
19 | and at91_mci_get_ro. | |
20 | ||
21 | SET IOS | |
22 | This configures the device to put it into the correct mode and clock speed | |
23 | required. | |
24 | ||
25 | MCI REQUEST | |
26 | MCI request processes the commands sent in the mmc_request structure. This | |
27 | can consist of a processing command and a stop command in the case of | |
28 | multiple block transfers. | |
29 | ||
30 | There are three main types of request, commands, reads and writes. | |
31 | ||
32 | Commands are straight forward. The command is submitted to the controller and | |
33 | the request function returns. When the controller generates an interrupt to indicate | |
34 | the command is finished, the response to the command are read and the mmc_request_done | |
35 | function called to end the request. | |
36 | ||
37 | Reads and writes work in a similar manner to normal commands but involve the PDC (DMA) | |
38 | controller to manage the transfers. | |
39 | ||
40 | A read is done from the controller directly to the scatterlist passed in from the request. | |
99eeb8df AV |
41 | Due to a bug in the AT91RM9200 controller, when a read is completed, all the words are byte |
42 | swapped in the scatterlist buffers. AT91SAM926x are not affected by this bug. | |
65dbf343 AV |
43 | |
44 | The sequence of read interrupts is: ENDRX, RXBUFF, CMDRDY | |
45 | ||
46 | A write is slightly different in that the bytes to write are read from the scatterlist | |
47 | into a dma memory buffer (this is in case the source buffer should be read only). The | |
48 | entire write buffer is then done from this single dma memory buffer. | |
49 | ||
50 | The sequence of write interrupts is: ENDTX, TXBUFE, NOTBUSY, CMDRDY | |
51 | ||
52 | GET RO | |
53 | Gets the status of the write protect pin, if available. | |
54 | */ | |
55 | ||
65dbf343 AV |
56 | #include <linux/module.h> |
57 | #include <linux/moduleparam.h> | |
58 | #include <linux/init.h> | |
59 | #include <linux/ioport.h> | |
60 | #include <linux/platform_device.h> | |
61 | #include <linux/interrupt.h> | |
62 | #include <linux/blkdev.h> | |
63 | #include <linux/delay.h> | |
64 | #include <linux/err.h> | |
65 | #include <linux/dma-mapping.h> | |
66 | #include <linux/clk.h> | |
93a3ddc2 | 67 | #include <linux/atmel_pdc.h> |
65dbf343 AV |
68 | |
69 | #include <linux/mmc/host.h> | |
65dbf343 AV |
70 | |
71 | #include <asm/io.h> | |
72 | #include <asm/irq.h> | |
73 | #include <asm/mach/mmc.h> | |
74 | #include <asm/arch/board.h> | |
99eeb8df | 75 | #include <asm/arch/cpu.h> |
65dbf343 | 76 | #include <asm/arch/gpio.h> |
55d8baee | 77 | #include <asm/arch/at91_mci.h> |
65dbf343 AV |
78 | |
79 | #define DRIVER_NAME "at91_mci" | |
80 | ||
df05a303 AV |
81 | #define FL_SENT_COMMAND (1 << 0) |
82 | #define FL_SENT_STOP (1 << 1) | |
65dbf343 | 83 | |
df05a303 AV |
84 | #define AT91_MCI_ERRORS (AT91_MCI_RINDE | AT91_MCI_RDIRE | AT91_MCI_RCRCE \ |
85 | | AT91_MCI_RENDE | AT91_MCI_RTOE | AT91_MCI_DCRCE \ | |
86 | | AT91_MCI_DTOE | AT91_MCI_OVRE | AT91_MCI_UNRE) | |
65dbf343 | 87 | |
e0b19b83 AV |
88 | #define at91_mci_read(host, reg) __raw_readl((host)->baseaddr + (reg)) |
89 | #define at91_mci_write(host, reg, val) __raw_writel((val), (host)->baseaddr + (reg)) | |
65dbf343 | 90 | |
65dbf343 AV |
91 | |
92 | /* | |
93 | * Low level type for this driver | |
94 | */ | |
95 | struct at91mci_host | |
96 | { | |
97 | struct mmc_host *mmc; | |
98 | struct mmc_command *cmd; | |
99 | struct mmc_request *request; | |
100 | ||
e0b19b83 | 101 | void __iomem *baseaddr; |
17ea0595 | 102 | int irq; |
e0b19b83 | 103 | |
65dbf343 AV |
104 | struct at91_mmc_data *board; |
105 | int present; | |
106 | ||
3dd3b039 AV |
107 | struct clk *mci_clk; |
108 | ||
65dbf343 AV |
109 | /* |
110 | * Flag indicating when the command has been sent. This is used to | |
111 | * work out whether or not to send the stop | |
112 | */ | |
113 | unsigned int flags; | |
114 | /* flag for current bus settings */ | |
115 | u32 bus_mode; | |
116 | ||
117 | /* DMA buffer used for transmitting */ | |
118 | unsigned int* buffer; | |
119 | dma_addr_t physical_address; | |
120 | unsigned int total_length; | |
121 | ||
122 | /* Latest in the scatterlist that has been enabled for transfer, but not freed */ | |
123 | int in_use_index; | |
124 | ||
125 | /* Latest in the scatterlist that has been enabled for transfer */ | |
126 | int transfer_index; | |
127 | }; | |
128 | ||
129 | /* | |
130 | * Copy from sg to a dma block - used for transfers | |
131 | */ | |
e8d04d3d | 132 | static inline void at91_mci_sg_to_dma(struct at91mci_host *host, struct mmc_data *data) |
65dbf343 AV |
133 | { |
134 | unsigned int len, i, size; | |
135 | unsigned *dmabuf = host->buffer; | |
136 | ||
137 | size = host->total_length; | |
138 | len = data->sg_len; | |
139 | ||
140 | /* | |
141 | * Just loop through all entries. Size might not | |
142 | * be the entire list though so make sure that | |
143 | * we do not transfer too much. | |
144 | */ | |
145 | for (i = 0; i < len; i++) { | |
146 | struct scatterlist *sg; | |
147 | int amount; | |
65dbf343 AV |
148 | unsigned int *sgbuffer; |
149 | ||
150 | sg = &data->sg[i]; | |
151 | ||
152 | sgbuffer = kmap_atomic(sg->page, KM_BIO_SRC_IRQ) + sg->offset; | |
153 | amount = min(size, sg->length); | |
154 | size -= amount; | |
65dbf343 | 155 | |
99eeb8df AV |
156 | if (cpu_is_at91rm9200()) { /* AT91RM9200 errata */ |
157 | int index; | |
158 | ||
159 | for (index = 0; index < (amount / 4); index++) | |
160 | *dmabuf++ = swab32(sgbuffer[index]); | |
161 | } | |
162 | else | |
163 | memcpy(dmabuf, sgbuffer, amount); | |
65dbf343 AV |
164 | |
165 | kunmap_atomic(sgbuffer, KM_BIO_SRC_IRQ); | |
166 | ||
167 | if (size == 0) | |
168 | break; | |
169 | } | |
170 | ||
171 | /* | |
172 | * Check that we didn't get a request to transfer | |
173 | * more data than can fit into the SG list. | |
174 | */ | |
175 | BUG_ON(size != 0); | |
176 | } | |
177 | ||
178 | /* | |
179 | * Prepare a dma read | |
180 | */ | |
e8d04d3d | 181 | static void at91_mci_pre_dma_read(struct at91mci_host *host) |
65dbf343 AV |
182 | { |
183 | int i; | |
184 | struct scatterlist *sg; | |
185 | struct mmc_command *cmd; | |
186 | struct mmc_data *data; | |
187 | ||
b44fb7a0 | 188 | pr_debug("pre dma read\n"); |
65dbf343 AV |
189 | |
190 | cmd = host->cmd; | |
191 | if (!cmd) { | |
b44fb7a0 | 192 | pr_debug("no command\n"); |
65dbf343 AV |
193 | return; |
194 | } | |
195 | ||
196 | data = cmd->data; | |
197 | if (!data) { | |
b44fb7a0 | 198 | pr_debug("no data\n"); |
65dbf343 AV |
199 | return; |
200 | } | |
201 | ||
202 | for (i = 0; i < 2; i++) { | |
203 | /* nothing left to transfer */ | |
204 | if (host->transfer_index >= data->sg_len) { | |
b44fb7a0 | 205 | pr_debug("Nothing left to transfer (index = %d)\n", host->transfer_index); |
65dbf343 AV |
206 | break; |
207 | } | |
208 | ||
209 | /* Check to see if this needs filling */ | |
210 | if (i == 0) { | |
93a3ddc2 | 211 | if (at91_mci_read(host, ATMEL_PDC_RCR) != 0) { |
b44fb7a0 | 212 | pr_debug("Transfer active in current\n"); |
65dbf343 AV |
213 | continue; |
214 | } | |
215 | } | |
216 | else { | |
93a3ddc2 | 217 | if (at91_mci_read(host, ATMEL_PDC_RNCR) != 0) { |
b44fb7a0 | 218 | pr_debug("Transfer active in next\n"); |
65dbf343 AV |
219 | continue; |
220 | } | |
221 | } | |
222 | ||
223 | /* Setup the next transfer */ | |
b44fb7a0 | 224 | pr_debug("Using transfer index %d\n", host->transfer_index); |
65dbf343 AV |
225 | |
226 | sg = &data->sg[host->transfer_index++]; | |
b44fb7a0 | 227 | pr_debug("sg = %p\n", sg); |
65dbf343 AV |
228 | |
229 | sg->dma_address = dma_map_page(NULL, sg->page, sg->offset, sg->length, DMA_FROM_DEVICE); | |
230 | ||
b44fb7a0 | 231 | pr_debug("dma address = %08X, length = %d\n", sg->dma_address, sg->length); |
65dbf343 AV |
232 | |
233 | if (i == 0) { | |
93a3ddc2 AV |
234 | at91_mci_write(host, ATMEL_PDC_RPR, sg->dma_address); |
235 | at91_mci_write(host, ATMEL_PDC_RCR, sg->length / 4); | |
65dbf343 AV |
236 | } |
237 | else { | |
93a3ddc2 AV |
238 | at91_mci_write(host, ATMEL_PDC_RNPR, sg->dma_address); |
239 | at91_mci_write(host, ATMEL_PDC_RNCR, sg->length / 4); | |
65dbf343 AV |
240 | } |
241 | } | |
242 | ||
b44fb7a0 | 243 | pr_debug("pre dma read done\n"); |
65dbf343 AV |
244 | } |
245 | ||
246 | /* | |
247 | * Handle after a dma read | |
248 | */ | |
e8d04d3d | 249 | static void at91_mci_post_dma_read(struct at91mci_host *host) |
65dbf343 AV |
250 | { |
251 | struct mmc_command *cmd; | |
252 | struct mmc_data *data; | |
253 | ||
b44fb7a0 | 254 | pr_debug("post dma read\n"); |
65dbf343 AV |
255 | |
256 | cmd = host->cmd; | |
257 | if (!cmd) { | |
b44fb7a0 | 258 | pr_debug("no command\n"); |
65dbf343 AV |
259 | return; |
260 | } | |
261 | ||
262 | data = cmd->data; | |
263 | if (!data) { | |
b44fb7a0 | 264 | pr_debug("no data\n"); |
65dbf343 AV |
265 | return; |
266 | } | |
267 | ||
268 | while (host->in_use_index < host->transfer_index) { | |
65dbf343 AV |
269 | struct scatterlist *sg; |
270 | ||
b44fb7a0 | 271 | pr_debug("finishing index %d\n", host->in_use_index); |
65dbf343 AV |
272 | |
273 | sg = &data->sg[host->in_use_index++]; | |
274 | ||
b44fb7a0 | 275 | pr_debug("Unmapping page %08X\n", sg->dma_address); |
65dbf343 AV |
276 | |
277 | dma_unmap_page(NULL, sg->dma_address, sg->length, DMA_FROM_DEVICE); | |
278 | ||
65dbf343 AV |
279 | data->bytes_xfered += sg->length; |
280 | ||
99eeb8df | 281 | if (cpu_is_at91rm9200()) { /* AT91RM9200 errata */ |
ed99c541 | 282 | unsigned int *buffer; |
99eeb8df | 283 | int index; |
65dbf343 | 284 | |
ed99c541 NF |
285 | /* Swap the contents of the buffer */ |
286 | buffer = kmap_atomic(sg->page, KM_BIO_SRC_IRQ) + sg->offset; | |
287 | pr_debug("buffer = %p, length = %d\n", buffer, sg->length); | |
288 | ||
99eeb8df AV |
289 | for (index = 0; index < (sg->length / 4); index++) |
290 | buffer[index] = swab32(buffer[index]); | |
ed99c541 NF |
291 | |
292 | kunmap_atomic(buffer, KM_BIO_SRC_IRQ); | |
65dbf343 | 293 | } |
99eeb8df | 294 | |
65dbf343 AV |
295 | flush_dcache_page(sg->page); |
296 | } | |
297 | ||
298 | /* Is there another transfer to trigger? */ | |
299 | if (host->transfer_index < data->sg_len) | |
e8d04d3d | 300 | at91_mci_pre_dma_read(host); |
65dbf343 | 301 | else { |
ed99c541 | 302 | at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_ENDRX); |
e0b19b83 | 303 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_RXBUFF); |
65dbf343 AV |
304 | } |
305 | ||
b44fb7a0 | 306 | pr_debug("post dma read done\n"); |
65dbf343 AV |
307 | } |
308 | ||
309 | /* | |
310 | * Handle transmitted data | |
311 | */ | |
312 | static void at91_mci_handle_transmitted(struct at91mci_host *host) | |
313 | { | |
314 | struct mmc_command *cmd; | |
315 | struct mmc_data *data; | |
316 | ||
b44fb7a0 | 317 | pr_debug("Handling the transmit\n"); |
65dbf343 AV |
318 | |
319 | /* Disable the transfer */ | |
93a3ddc2 | 320 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS); |
65dbf343 AV |
321 | |
322 | /* Now wait for cmd ready */ | |
e0b19b83 | 323 | at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_TXBUFE); |
65dbf343 AV |
324 | |
325 | cmd = host->cmd; | |
326 | if (!cmd) return; | |
327 | ||
328 | data = cmd->data; | |
329 | if (!data) return; | |
330 | ||
ed99c541 NF |
331 | if (cmd->data->flags & MMC_DATA_MULTI) { |
332 | pr_debug("multiple write : wait for BLKE...\n"); | |
333 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_BLKE); | |
334 | } else | |
335 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_NOTBUSY); | |
336 | ||
65dbf343 AV |
337 | data->bytes_xfered = host->total_length; |
338 | } | |
339 | ||
ed99c541 NF |
340 | /*Handle after command sent ready*/ |
341 | static int at91_mci_handle_cmdrdy(struct at91mci_host *host) | |
342 | { | |
343 | if (!host->cmd) | |
344 | return 1; | |
345 | else if (!host->cmd->data) { | |
346 | if (host->flags & FL_SENT_STOP) { | |
347 | /*After multi block write, we must wait for NOTBUSY*/ | |
348 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_NOTBUSY); | |
349 | } else return 1; | |
350 | } else if (host->cmd->data->flags & MMC_DATA_WRITE) { | |
351 | /*After sendding multi-block-write command, start DMA transfer*/ | |
352 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_TXBUFE); | |
353 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_BLKE); | |
354 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN); | |
355 | } | |
356 | ||
357 | /* command not completed, have to wait */ | |
358 | return 0; | |
359 | } | |
360 | ||
361 | ||
65dbf343 AV |
362 | /* |
363 | * Enable the controller | |
364 | */ | |
e0b19b83 | 365 | static void at91_mci_enable(struct at91mci_host *host) |
65dbf343 | 366 | { |
ed99c541 NF |
367 | unsigned int mr; |
368 | ||
e0b19b83 | 369 | at91_mci_write(host, AT91_MCI_CR, AT91_MCI_MCIEN); |
f3a8efa9 | 370 | at91_mci_write(host, AT91_MCI_IDR, 0xffffffff); |
e0b19b83 | 371 | at91_mci_write(host, AT91_MCI_DTOR, AT91_MCI_DTOMUL_1M | AT91_MCI_DTOCYC); |
ed99c541 NF |
372 | mr = AT91_MCI_PDCMODE | 0x34a; |
373 | ||
374 | if (cpu_is_at91sam9260() || cpu_is_at91sam9263()) | |
375 | mr |= AT91_MCI_RDPROOF | AT91_MCI_WRPROOF; | |
376 | ||
377 | at91_mci_write(host, AT91_MCI_MR, mr); | |
99eeb8df AV |
378 | |
379 | /* use Slot A or B (only one at same time) */ | |
380 | at91_mci_write(host, AT91_MCI_SDCR, host->board->slot_b); | |
65dbf343 AV |
381 | } |
382 | ||
383 | /* | |
384 | * Disable the controller | |
385 | */ | |
e0b19b83 | 386 | static void at91_mci_disable(struct at91mci_host *host) |
65dbf343 | 387 | { |
e0b19b83 | 388 | at91_mci_write(host, AT91_MCI_CR, AT91_MCI_MCIDIS | AT91_MCI_SWRST); |
65dbf343 AV |
389 | } |
390 | ||
391 | /* | |
392 | * Send a command | |
65dbf343 | 393 | */ |
ed99c541 | 394 | static void at91_mci_send_command(struct at91mci_host *host, struct mmc_command *cmd) |
65dbf343 AV |
395 | { |
396 | unsigned int cmdr, mr; | |
397 | unsigned int block_length; | |
398 | struct mmc_data *data = cmd->data; | |
399 | ||
400 | unsigned int blocks; | |
401 | unsigned int ier = 0; | |
402 | ||
403 | host->cmd = cmd; | |
404 | ||
ed99c541 | 405 | /* Needed for leaving busy state before CMD1 */ |
e0b19b83 | 406 | if ((at91_mci_read(host, AT91_MCI_SR) & AT91_MCI_RTOE) && (cmd->opcode == 1)) { |
b44fb7a0 | 407 | pr_debug("Clearing timeout\n"); |
e0b19b83 AV |
408 | at91_mci_write(host, AT91_MCI_ARGR, 0); |
409 | at91_mci_write(host, AT91_MCI_CMDR, AT91_MCI_OPDCMD); | |
410 | while (!(at91_mci_read(host, AT91_MCI_SR) & AT91_MCI_CMDRDY)) { | |
65dbf343 | 411 | /* spin */ |
e0b19b83 | 412 | pr_debug("Clearing: SR = %08X\n", at91_mci_read(host, AT91_MCI_SR)); |
65dbf343 AV |
413 | } |
414 | } | |
ed99c541 | 415 | |
65dbf343 AV |
416 | cmdr = cmd->opcode; |
417 | ||
418 | if (mmc_resp_type(cmd) == MMC_RSP_NONE) | |
419 | cmdr |= AT91_MCI_RSPTYP_NONE; | |
420 | else { | |
421 | /* if a response is expected then allow maximum response latancy */ | |
422 | cmdr |= AT91_MCI_MAXLAT; | |
423 | /* set 136 bit response for R2, 48 bit response otherwise */ | |
424 | if (mmc_resp_type(cmd) == MMC_RSP_R2) | |
425 | cmdr |= AT91_MCI_RSPTYP_136; | |
426 | else | |
427 | cmdr |= AT91_MCI_RSPTYP_48; | |
428 | } | |
429 | ||
430 | if (data) { | |
a3fd4a1b | 431 | block_length = data->blksz; |
65dbf343 AV |
432 | blocks = data->blocks; |
433 | ||
434 | /* always set data start - also set direction flag for read */ | |
435 | if (data->flags & MMC_DATA_READ) | |
436 | cmdr |= (AT91_MCI_TRDIR | AT91_MCI_TRCMD_START); | |
437 | else if (data->flags & MMC_DATA_WRITE) | |
438 | cmdr |= AT91_MCI_TRCMD_START; | |
439 | ||
440 | if (data->flags & MMC_DATA_STREAM) | |
441 | cmdr |= AT91_MCI_TRTYP_STREAM; | |
442 | if (data->flags & MMC_DATA_MULTI) | |
443 | cmdr |= AT91_MCI_TRTYP_MULTIPLE; | |
444 | } | |
445 | else { | |
446 | block_length = 0; | |
447 | blocks = 0; | |
448 | } | |
449 | ||
b6cedb38 | 450 | if (host->flags & FL_SENT_STOP) |
65dbf343 AV |
451 | cmdr |= AT91_MCI_TRCMD_STOP; |
452 | ||
453 | if (host->bus_mode == MMC_BUSMODE_OPENDRAIN) | |
454 | cmdr |= AT91_MCI_OPDCMD; | |
455 | ||
456 | /* | |
457 | * Set the arguments and send the command | |
458 | */ | |
f3a8efa9 | 459 | pr_debug("Sending command %d as %08X, arg = %08X, blocks = %d, length = %d (MR = %08X)\n", |
e0b19b83 | 460 | cmd->opcode, cmdr, cmd->arg, blocks, block_length, at91_mci_read(host, AT91_MCI_MR)); |
65dbf343 AV |
461 | |
462 | if (!data) { | |
93a3ddc2 AV |
463 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_TXTDIS | ATMEL_PDC_RXTDIS); |
464 | at91_mci_write(host, ATMEL_PDC_RPR, 0); | |
465 | at91_mci_write(host, ATMEL_PDC_RCR, 0); | |
466 | at91_mci_write(host, ATMEL_PDC_RNPR, 0); | |
467 | at91_mci_write(host, ATMEL_PDC_RNCR, 0); | |
468 | at91_mci_write(host, ATMEL_PDC_TPR, 0); | |
469 | at91_mci_write(host, ATMEL_PDC_TCR, 0); | |
470 | at91_mci_write(host, ATMEL_PDC_TNPR, 0); | |
471 | at91_mci_write(host, ATMEL_PDC_TNCR, 0); | |
ed99c541 NF |
472 | ier = AT91_MCI_CMDRDY; |
473 | } else { | |
474 | /* zero block length and PDC mode */ | |
475 | mr = at91_mci_read(host, AT91_MCI_MR) & 0x7fff; | |
476 | at91_mci_write(host, AT91_MCI_MR, mr | (block_length << 16) | AT91_MCI_PDCMODE); | |
e0b19b83 | 477 | |
ed99c541 NF |
478 | /* |
479 | * Disable the PDC controller | |
480 | */ | |
481 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS); | |
65dbf343 | 482 | |
ed99c541 NF |
483 | if (cmdr & AT91_MCI_TRCMD_START) { |
484 | data->bytes_xfered = 0; | |
485 | host->transfer_index = 0; | |
486 | host->in_use_index = 0; | |
487 | if (cmdr & AT91_MCI_TRDIR) { | |
488 | /* | |
489 | * Handle a read | |
490 | */ | |
491 | host->buffer = NULL; | |
492 | host->total_length = 0; | |
493 | ||
494 | at91_mci_pre_dma_read(host); | |
495 | ier = AT91_MCI_ENDRX /* | AT91_MCI_RXBUFF */; | |
496 | } | |
497 | else { | |
498 | /* | |
499 | * Handle a write | |
500 | */ | |
501 | host->total_length = block_length * blocks; | |
502 | host->buffer = dma_alloc_coherent(NULL, | |
503 | host->total_length, | |
504 | &host->physical_address, GFP_KERNEL); | |
505 | ||
506 | at91_mci_sg_to_dma(host, data); | |
507 | ||
508 | pr_debug("Transmitting %d bytes\n", host->total_length); | |
509 | ||
510 | at91_mci_write(host, ATMEL_PDC_TPR, host->physical_address); | |
511 | at91_mci_write(host, ATMEL_PDC_TCR, host->total_length / 4); | |
512 | ier = AT91_MCI_CMDRDY; | |
513 | } | |
65dbf343 AV |
514 | } |
515 | } | |
516 | ||
517 | /* | |
518 | * Send the command and then enable the PDC - not the other way round as | |
519 | * the data sheet says | |
520 | */ | |
521 | ||
e0b19b83 AV |
522 | at91_mci_write(host, AT91_MCI_ARGR, cmd->arg); |
523 | at91_mci_write(host, AT91_MCI_CMDR, cmdr); | |
65dbf343 AV |
524 | |
525 | if (cmdr & AT91_MCI_TRCMD_START) { | |
526 | if (cmdr & AT91_MCI_TRDIR) | |
93a3ddc2 | 527 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTEN); |
65dbf343 | 528 | } |
65dbf343 | 529 | |
ed99c541 | 530 | /* Enable selected interrupts */ |
df05a303 | 531 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_ERRORS | ier); |
65dbf343 AV |
532 | } |
533 | ||
534 | /* | |
535 | * Process the next step in the request | |
536 | */ | |
e8d04d3d | 537 | static void at91_mci_process_next(struct at91mci_host *host) |
65dbf343 AV |
538 | { |
539 | if (!(host->flags & FL_SENT_COMMAND)) { | |
540 | host->flags |= FL_SENT_COMMAND; | |
ed99c541 | 541 | at91_mci_send_command(host, host->request->cmd); |
65dbf343 AV |
542 | } |
543 | else if ((!(host->flags & FL_SENT_STOP)) && host->request->stop) { | |
544 | host->flags |= FL_SENT_STOP; | |
ed99c541 | 545 | at91_mci_send_command(host, host->request->stop); |
65dbf343 AV |
546 | } |
547 | else | |
548 | mmc_request_done(host->mmc, host->request); | |
549 | } | |
550 | ||
551 | /* | |
552 | * Handle a command that has been completed | |
553 | */ | |
e8d04d3d | 554 | static void at91_mci_completed_command(struct at91mci_host *host) |
65dbf343 AV |
555 | { |
556 | struct mmc_command *cmd = host->cmd; | |
557 | unsigned int status; | |
558 | ||
e0b19b83 | 559 | at91_mci_write(host, AT91_MCI_IDR, 0xffffffff); |
65dbf343 | 560 | |
e0b19b83 AV |
561 | cmd->resp[0] = at91_mci_read(host, AT91_MCI_RSPR(0)); |
562 | cmd->resp[1] = at91_mci_read(host, AT91_MCI_RSPR(1)); | |
563 | cmd->resp[2] = at91_mci_read(host, AT91_MCI_RSPR(2)); | |
564 | cmd->resp[3] = at91_mci_read(host, AT91_MCI_RSPR(3)); | |
65dbf343 AV |
565 | |
566 | if (host->buffer) { | |
567 | dma_free_coherent(NULL, host->total_length, host->buffer, host->physical_address); | |
568 | host->buffer = NULL; | |
569 | } | |
570 | ||
e0b19b83 | 571 | status = at91_mci_read(host, AT91_MCI_SR); |
65dbf343 | 572 | |
b44fb7a0 | 573 | pr_debug("Status = %08X [%08X %08X %08X %08X]\n", |
65dbf343 AV |
574 | status, cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]); |
575 | ||
576 | if (status & (AT91_MCI_RINDE | AT91_MCI_RDIRE | AT91_MCI_RCRCE | | |
577 | AT91_MCI_RENDE | AT91_MCI_RTOE | AT91_MCI_DCRCE | | |
578 | AT91_MCI_DTOE | AT91_MCI_OVRE | AT91_MCI_UNRE)) { | |
b6cedb38 | 579 | if ((status & AT91_MCI_RCRCE) && !(mmc_resp_type(cmd) & MMC_RSP_CRC)) { |
65dbf343 AV |
580 | cmd->error = MMC_ERR_NONE; |
581 | } | |
582 | else { | |
583 | if (status & (AT91_MCI_RTOE | AT91_MCI_DTOE)) | |
584 | cmd->error = MMC_ERR_TIMEOUT; | |
585 | else if (status & (AT91_MCI_RCRCE | AT91_MCI_DCRCE)) | |
586 | cmd->error = MMC_ERR_BADCRC; | |
587 | else if (status & (AT91_MCI_OVRE | AT91_MCI_UNRE)) | |
588 | cmd->error = MMC_ERR_FIFO; | |
589 | else | |
590 | cmd->error = MMC_ERR_FAILED; | |
591 | ||
b44fb7a0 | 592 | pr_debug("Error detected and set to %d (cmd = %d, retries = %d)\n", |
65dbf343 AV |
593 | cmd->error, cmd->opcode, cmd->retries); |
594 | } | |
595 | } | |
596 | else | |
597 | cmd->error = MMC_ERR_NONE; | |
598 | ||
e8d04d3d | 599 | at91_mci_process_next(host); |
65dbf343 AV |
600 | } |
601 | ||
602 | /* | |
603 | * Handle an MMC request | |
604 | */ | |
605 | static void at91_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
606 | { | |
607 | struct at91mci_host *host = mmc_priv(mmc); | |
608 | host->request = mrq; | |
609 | host->flags = 0; | |
610 | ||
e8d04d3d | 611 | at91_mci_process_next(host); |
65dbf343 AV |
612 | } |
613 | ||
614 | /* | |
615 | * Set the IOS | |
616 | */ | |
617 | static void at91_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
618 | { | |
619 | int clkdiv; | |
620 | struct at91mci_host *host = mmc_priv(mmc); | |
3dd3b039 | 621 | unsigned long at91_master_clock = clk_get_rate(host->mci_clk); |
65dbf343 | 622 | |
b44fb7a0 | 623 | host->bus_mode = ios->bus_mode; |
65dbf343 AV |
624 | |
625 | if (ios->clock == 0) { | |
626 | /* Disable the MCI controller */ | |
e0b19b83 | 627 | at91_mci_write(host, AT91_MCI_CR, AT91_MCI_MCIDIS); |
65dbf343 AV |
628 | clkdiv = 0; |
629 | } | |
630 | else { | |
631 | /* Enable the MCI controller */ | |
e0b19b83 | 632 | at91_mci_write(host, AT91_MCI_CR, AT91_MCI_MCIEN); |
65dbf343 AV |
633 | |
634 | if ((at91_master_clock % (ios->clock * 2)) == 0) | |
635 | clkdiv = ((at91_master_clock / ios->clock) / 2) - 1; | |
636 | else | |
637 | clkdiv = (at91_master_clock / ios->clock) / 2; | |
638 | ||
b44fb7a0 | 639 | pr_debug("clkdiv = %d. mcck = %ld\n", clkdiv, |
65dbf343 AV |
640 | at91_master_clock / (2 * (clkdiv + 1))); |
641 | } | |
642 | if (ios->bus_width == MMC_BUS_WIDTH_4 && host->board->wire4) { | |
b44fb7a0 | 643 | pr_debug("MMC: Setting controller bus width to 4\n"); |
e0b19b83 | 644 | at91_mci_write(host, AT91_MCI_SDCR, at91_mci_read(host, AT91_MCI_SDCR) | AT91_MCI_SDCBUS); |
65dbf343 AV |
645 | } |
646 | else { | |
b44fb7a0 | 647 | pr_debug("MMC: Setting controller bus width to 1\n"); |
e0b19b83 | 648 | at91_mci_write(host, AT91_MCI_SDCR, at91_mci_read(host, AT91_MCI_SDCR) & ~AT91_MCI_SDCBUS); |
65dbf343 AV |
649 | } |
650 | ||
651 | /* Set the clock divider */ | |
e0b19b83 | 652 | at91_mci_write(host, AT91_MCI_MR, (at91_mci_read(host, AT91_MCI_MR) & ~AT91_MCI_CLKDIV) | clkdiv); |
65dbf343 AV |
653 | |
654 | /* maybe switch power to the card */ | |
b44fb7a0 | 655 | if (host->board->vcc_pin) { |
65dbf343 AV |
656 | switch (ios->power_mode) { |
657 | case MMC_POWER_OFF: | |
99eeb8df | 658 | at91_set_gpio_value(host->board->vcc_pin, 0); |
65dbf343 AV |
659 | break; |
660 | case MMC_POWER_UP: | |
661 | case MMC_POWER_ON: | |
99eeb8df | 662 | at91_set_gpio_value(host->board->vcc_pin, 1); |
65dbf343 AV |
663 | break; |
664 | } | |
665 | } | |
666 | } | |
667 | ||
668 | /* | |
669 | * Handle an interrupt | |
670 | */ | |
7d12e780 | 671 | static irqreturn_t at91_mci_irq(int irq, void *devid) |
65dbf343 AV |
672 | { |
673 | struct at91mci_host *host = devid; | |
674 | int completed = 0; | |
df05a303 | 675 | unsigned int int_status, int_mask; |
65dbf343 | 676 | |
e0b19b83 | 677 | int_status = at91_mci_read(host, AT91_MCI_SR); |
df05a303 AV |
678 | int_mask = at91_mci_read(host, AT91_MCI_IMR); |
679 | ||
f3a8efa9 | 680 | pr_debug("MCI irq: status = %08X, %08X, %08X\n", int_status, int_mask, |
df05a303 AV |
681 | int_status & int_mask); |
682 | ||
683 | int_status = int_status & int_mask; | |
684 | ||
685 | if (int_status & AT91_MCI_ERRORS) { | |
65dbf343 | 686 | completed = 1; |
df05a303 AV |
687 | |
688 | if (int_status & AT91_MCI_UNRE) | |
689 | pr_debug("MMC: Underrun error\n"); | |
690 | if (int_status & AT91_MCI_OVRE) | |
691 | pr_debug("MMC: Overrun error\n"); | |
692 | if (int_status & AT91_MCI_DTOE) | |
693 | pr_debug("MMC: Data timeout\n"); | |
694 | if (int_status & AT91_MCI_DCRCE) | |
695 | pr_debug("MMC: CRC error in data\n"); | |
696 | if (int_status & AT91_MCI_RTOE) | |
697 | pr_debug("MMC: Response timeout\n"); | |
698 | if (int_status & AT91_MCI_RENDE) | |
699 | pr_debug("MMC: Response end bit error\n"); | |
700 | if (int_status & AT91_MCI_RCRCE) | |
701 | pr_debug("MMC: Response CRC error\n"); | |
702 | if (int_status & AT91_MCI_RDIRE) | |
703 | pr_debug("MMC: Response direction error\n"); | |
704 | if (int_status & AT91_MCI_RINDE) | |
705 | pr_debug("MMC: Response index error\n"); | |
706 | } else { | |
707 | /* Only continue processing if no errors */ | |
65dbf343 | 708 | |
65dbf343 | 709 | if (int_status & AT91_MCI_TXBUFE) { |
b44fb7a0 | 710 | pr_debug("TX buffer empty\n"); |
65dbf343 AV |
711 | at91_mci_handle_transmitted(host); |
712 | } | |
713 | ||
ed99c541 NF |
714 | if (int_status & AT91_MCI_ENDRX) { |
715 | pr_debug("ENDRX\n"); | |
716 | at91_mci_post_dma_read(host); | |
717 | } | |
718 | ||
65dbf343 | 719 | if (int_status & AT91_MCI_RXBUFF) { |
b44fb7a0 | 720 | pr_debug("RX buffer full\n"); |
ed99c541 NF |
721 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS); |
722 | at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_RXBUFF | AT91_MCI_ENDRX); | |
723 | completed = 1; | |
65dbf343 AV |
724 | } |
725 | ||
df05a303 | 726 | if (int_status & AT91_MCI_ENDTX) |
b44fb7a0 | 727 | pr_debug("Transmit has ended\n"); |
65dbf343 | 728 | |
65dbf343 | 729 | if (int_status & AT91_MCI_NOTBUSY) { |
b44fb7a0 | 730 | pr_debug("Card is ready\n"); |
ed99c541 | 731 | completed = 1; |
65dbf343 AV |
732 | } |
733 | ||
df05a303 | 734 | if (int_status & AT91_MCI_DTIP) |
b44fb7a0 | 735 | pr_debug("Data transfer in progress\n"); |
65dbf343 | 736 | |
ed99c541 | 737 | if (int_status & AT91_MCI_BLKE) { |
b44fb7a0 | 738 | pr_debug("Block transfer has ended\n"); |
ed99c541 NF |
739 | completed = 1; |
740 | } | |
65dbf343 | 741 | |
df05a303 | 742 | if (int_status & AT91_MCI_TXRDY) |
b44fb7a0 | 743 | pr_debug("Ready to transmit\n"); |
65dbf343 | 744 | |
df05a303 | 745 | if (int_status & AT91_MCI_RXRDY) |
b44fb7a0 | 746 | pr_debug("Ready to receive\n"); |
65dbf343 AV |
747 | |
748 | if (int_status & AT91_MCI_CMDRDY) { | |
b44fb7a0 | 749 | pr_debug("Command ready\n"); |
ed99c541 | 750 | completed = at91_mci_handle_cmdrdy(host); |
65dbf343 AV |
751 | } |
752 | } | |
65dbf343 AV |
753 | |
754 | if (completed) { | |
b44fb7a0 | 755 | pr_debug("Completed command\n"); |
e0b19b83 | 756 | at91_mci_write(host, AT91_MCI_IDR, 0xffffffff); |
e8d04d3d | 757 | at91_mci_completed_command(host); |
df05a303 AV |
758 | } else |
759 | at91_mci_write(host, AT91_MCI_IDR, int_status); | |
65dbf343 AV |
760 | |
761 | return IRQ_HANDLED; | |
762 | } | |
763 | ||
7d12e780 | 764 | static irqreturn_t at91_mmc_det_irq(int irq, void *_host) |
65dbf343 AV |
765 | { |
766 | struct at91mci_host *host = _host; | |
767 | int present = !at91_get_gpio_value(irq); | |
768 | ||
769 | /* | |
770 | * we expect this irq on both insert and remove, | |
771 | * and use a short delay to debounce. | |
772 | */ | |
773 | if (present != host->present) { | |
774 | host->present = present; | |
b44fb7a0 | 775 | pr_debug("%s: card %s\n", mmc_hostname(host->mmc), |
65dbf343 AV |
776 | present ? "insert" : "remove"); |
777 | if (!present) { | |
b44fb7a0 | 778 | pr_debug("****** Resetting SD-card bus width ******\n"); |
99eeb8df | 779 | at91_mci_write(host, AT91_MCI_SDCR, at91_mci_read(host, AT91_MCI_SDCR) & ~AT91_MCI_SDCBUS); |
65dbf343 AV |
780 | } |
781 | mmc_detect_change(host->mmc, msecs_to_jiffies(100)); | |
782 | } | |
783 | return IRQ_HANDLED; | |
784 | } | |
785 | ||
a26b498c | 786 | static int at91_mci_get_ro(struct mmc_host *mmc) |
65dbf343 AV |
787 | { |
788 | int read_only = 0; | |
789 | struct at91mci_host *host = mmc_priv(mmc); | |
790 | ||
791 | if (host->board->wp_pin) { | |
792 | read_only = at91_get_gpio_value(host->board->wp_pin); | |
793 | printk(KERN_WARNING "%s: card is %s\n", mmc_hostname(mmc), | |
794 | (read_only ? "read-only" : "read-write") ); | |
795 | } | |
796 | else { | |
797 | printk(KERN_WARNING "%s: host does not support reading read-only " | |
798 | "switch. Assuming write-enable.\n", mmc_hostname(mmc)); | |
799 | } | |
800 | return read_only; | |
801 | } | |
802 | ||
ab7aefd0 | 803 | static const struct mmc_host_ops at91_mci_ops = { |
65dbf343 AV |
804 | .request = at91_mci_request, |
805 | .set_ios = at91_mci_set_ios, | |
806 | .get_ro = at91_mci_get_ro, | |
807 | }; | |
808 | ||
809 | /* | |
810 | * Probe for the device | |
811 | */ | |
a26b498c | 812 | static int __init at91_mci_probe(struct platform_device *pdev) |
65dbf343 AV |
813 | { |
814 | struct mmc_host *mmc; | |
815 | struct at91mci_host *host; | |
17ea0595 | 816 | struct resource *res; |
65dbf343 AV |
817 | int ret; |
818 | ||
b44fb7a0 | 819 | pr_debug("Probe MCI devices\n"); |
65dbf343 | 820 | |
17ea0595 AV |
821 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
822 | if (!res) | |
823 | return -ENXIO; | |
824 | ||
825 | if (!request_mem_region(res->start, res->end - res->start + 1, DRIVER_NAME)) | |
826 | return -EBUSY; | |
827 | ||
65dbf343 AV |
828 | mmc = mmc_alloc_host(sizeof(struct at91mci_host), &pdev->dev); |
829 | if (!mmc) { | |
b44fb7a0 | 830 | pr_debug("Failed to allocate mmc host\n"); |
17ea0595 | 831 | release_mem_region(res->start, res->end - res->start + 1); |
65dbf343 AV |
832 | return -ENOMEM; |
833 | } | |
834 | ||
835 | mmc->ops = &at91_mci_ops; | |
836 | mmc->f_min = 375000; | |
837 | mmc->f_max = 25000000; | |
838 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
42431acb | 839 | mmc->caps = MMC_CAP_BYTEBLOCK; |
65dbf343 | 840 | |
fe4a3c7a | 841 | mmc->max_blk_size = 4095; |
55db890a | 842 | mmc->max_blk_count = mmc->max_req_size; |
fe4a3c7a | 843 | |
65dbf343 AV |
844 | host = mmc_priv(mmc); |
845 | host->mmc = mmc; | |
846 | host->buffer = NULL; | |
847 | host->bus_mode = 0; | |
848 | host->board = pdev->dev.platform_data; | |
849 | if (host->board->wire4) { | |
ed99c541 NF |
850 | if (cpu_is_at91sam9260() || cpu_is_at91sam9263()) |
851 | mmc->caps |= MMC_CAP_4_BIT_DATA; | |
852 | else | |
853 | printk("AT91 MMC: 4 wire bus mode not supported" | |
854 | " - using 1 wire\n"); | |
65dbf343 AV |
855 | } |
856 | ||
857 | /* | |
858 | * Get Clock | |
859 | */ | |
3dd3b039 AV |
860 | host->mci_clk = clk_get(&pdev->dev, "mci_clk"); |
861 | if (IS_ERR(host->mci_clk)) { | |
65dbf343 | 862 | printk(KERN_ERR "AT91 MMC: no clock defined.\n"); |
b44fb7a0 | 863 | mmc_free_host(mmc); |
17ea0595 | 864 | release_mem_region(res->start, res->end - res->start + 1); |
65dbf343 AV |
865 | return -ENODEV; |
866 | } | |
65dbf343 | 867 | |
17ea0595 AV |
868 | /* |
869 | * Map I/O region | |
870 | */ | |
871 | host->baseaddr = ioremap(res->start, res->end - res->start + 1); | |
872 | if (!host->baseaddr) { | |
3dd3b039 | 873 | clk_put(host->mci_clk); |
17ea0595 AV |
874 | mmc_free_host(mmc); |
875 | release_mem_region(res->start, res->end - res->start + 1); | |
876 | return -ENOMEM; | |
877 | } | |
e0b19b83 AV |
878 | |
879 | /* | |
880 | * Reset hardware | |
881 | */ | |
3dd3b039 | 882 | clk_enable(host->mci_clk); /* Enable the peripheral clock */ |
e0b19b83 AV |
883 | at91_mci_disable(host); |
884 | at91_mci_enable(host); | |
885 | ||
65dbf343 AV |
886 | /* |
887 | * Allocate the MCI interrupt | |
888 | */ | |
17ea0595 AV |
889 | host->irq = platform_get_irq(pdev, 0); |
890 | ret = request_irq(host->irq, at91_mci_irq, IRQF_SHARED, DRIVER_NAME, host); | |
65dbf343 | 891 | if (ret) { |
f3a8efa9 | 892 | printk(KERN_ERR "AT91 MMC: Failed to request MCI interrupt\n"); |
3dd3b039 AV |
893 | clk_disable(host->mci_clk); |
894 | clk_put(host->mci_clk); | |
b44fb7a0 | 895 | mmc_free_host(mmc); |
17ea0595 AV |
896 | iounmap(host->baseaddr); |
897 | release_mem_region(res->start, res->end - res->start + 1); | |
65dbf343 AV |
898 | return ret; |
899 | } | |
900 | ||
901 | platform_set_drvdata(pdev, mmc); | |
902 | ||
903 | /* | |
904 | * Add host to MMC layer | |
905 | */ | |
63b66438 | 906 | if (host->board->det_pin) { |
65dbf343 | 907 | host->present = !at91_get_gpio_value(host->board->det_pin); |
63b66438 MP |
908 | device_init_wakeup(&pdev->dev, 1); |
909 | } | |
65dbf343 AV |
910 | else |
911 | host->present = -1; | |
912 | ||
913 | mmc_add_host(mmc); | |
914 | ||
915 | /* | |
916 | * monitor card insertion/removal if we can | |
917 | */ | |
918 | if (host->board->det_pin) { | |
919 | ret = request_irq(host->board->det_pin, at91_mmc_det_irq, | |
b44fb7a0 | 920 | 0, DRIVER_NAME, host); |
65dbf343 | 921 | if (ret) |
f3a8efa9 | 922 | printk(KERN_ERR "AT91 MMC: Couldn't allocate MMC detect irq\n"); |
65dbf343 AV |
923 | } |
924 | ||
f3a8efa9 | 925 | pr_debug("Added MCI driver\n"); |
65dbf343 AV |
926 | |
927 | return 0; | |
928 | } | |
929 | ||
930 | /* | |
931 | * Remove a device | |
932 | */ | |
a26b498c | 933 | static int __exit at91_mci_remove(struct platform_device *pdev) |
65dbf343 AV |
934 | { |
935 | struct mmc_host *mmc = platform_get_drvdata(pdev); | |
936 | struct at91mci_host *host; | |
17ea0595 | 937 | struct resource *res; |
65dbf343 AV |
938 | |
939 | if (!mmc) | |
940 | return -1; | |
941 | ||
942 | host = mmc_priv(mmc); | |
943 | ||
944 | if (host->present != -1) { | |
63b66438 | 945 | device_init_wakeup(&pdev->dev, 0); |
65dbf343 AV |
946 | free_irq(host->board->det_pin, host); |
947 | cancel_delayed_work(&host->mmc->detect); | |
948 | } | |
949 | ||
e0b19b83 | 950 | at91_mci_disable(host); |
17ea0595 AV |
951 | mmc_remove_host(mmc); |
952 | free_irq(host->irq, host); | |
65dbf343 | 953 | |
3dd3b039 AV |
954 | clk_disable(host->mci_clk); /* Disable the peripheral clock */ |
955 | clk_put(host->mci_clk); | |
65dbf343 | 956 | |
17ea0595 AV |
957 | iounmap(host->baseaddr); |
958 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
959 | release_mem_region(res->start, res->end - res->start + 1); | |
65dbf343 | 960 | |
17ea0595 AV |
961 | mmc_free_host(mmc); |
962 | platform_set_drvdata(pdev, NULL); | |
b44fb7a0 | 963 | pr_debug("MCI Removed\n"); |
65dbf343 AV |
964 | |
965 | return 0; | |
966 | } | |
967 | ||
968 | #ifdef CONFIG_PM | |
969 | static int at91_mci_suspend(struct platform_device *pdev, pm_message_t state) | |
970 | { | |
971 | struct mmc_host *mmc = platform_get_drvdata(pdev); | |
63b66438 | 972 | struct at91mci_host *host = mmc_priv(mmc); |
65dbf343 AV |
973 | int ret = 0; |
974 | ||
63b66438 MP |
975 | if (device_may_wakeup(&pdev->dev)) |
976 | enable_irq_wake(host->board->det_pin); | |
977 | ||
65dbf343 AV |
978 | if (mmc) |
979 | ret = mmc_suspend_host(mmc, state); | |
980 | ||
981 | return ret; | |
982 | } | |
983 | ||
984 | static int at91_mci_resume(struct platform_device *pdev) | |
985 | { | |
986 | struct mmc_host *mmc = platform_get_drvdata(pdev); | |
63b66438 | 987 | struct at91mci_host *host = mmc_priv(mmc); |
65dbf343 AV |
988 | int ret = 0; |
989 | ||
63b66438 MP |
990 | if (device_may_wakeup(&pdev->dev)) |
991 | disable_irq_wake(host->board->det_pin); | |
992 | ||
65dbf343 AV |
993 | if (mmc) |
994 | ret = mmc_resume_host(mmc); | |
995 | ||
996 | return ret; | |
997 | } | |
998 | #else | |
999 | #define at91_mci_suspend NULL | |
1000 | #define at91_mci_resume NULL | |
1001 | #endif | |
1002 | ||
1003 | static struct platform_driver at91_mci_driver = { | |
a26b498c | 1004 | .remove = __exit_p(at91_mci_remove), |
65dbf343 AV |
1005 | .suspend = at91_mci_suspend, |
1006 | .resume = at91_mci_resume, | |
1007 | .driver = { | |
1008 | .name = DRIVER_NAME, | |
1009 | .owner = THIS_MODULE, | |
1010 | }, | |
1011 | }; | |
1012 | ||
1013 | static int __init at91_mci_init(void) | |
1014 | { | |
a26b498c | 1015 | return platform_driver_probe(&at91_mci_driver, at91_mci_probe); |
65dbf343 AV |
1016 | } |
1017 | ||
1018 | static void __exit at91_mci_exit(void) | |
1019 | { | |
1020 | platform_driver_unregister(&at91_mci_driver); | |
1021 | } | |
1022 | ||
1023 | module_init(at91_mci_init); | |
1024 | module_exit(at91_mci_exit); | |
1025 | ||
1026 | MODULE_DESCRIPTION("AT91 Multimedia Card Interface driver"); | |
1027 | MODULE_AUTHOR("Nick Randell"); | |
1028 | MODULE_LICENSE("GPL"); |