Commit | Line | Data |
---|---|---|
65dbf343 | 1 | /* |
70f10482 | 2 | * linux/drivers/mmc/host/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> | |
6e996ee8 DB |
73 | #include <asm/gpio.h> |
74 | ||
65dbf343 AV |
75 | #include <asm/mach/mmc.h> |
76 | #include <asm/arch/board.h> | |
99eeb8df | 77 | #include <asm/arch/cpu.h> |
55d8baee | 78 | #include <asm/arch/at91_mci.h> |
65dbf343 AV |
79 | |
80 | #define DRIVER_NAME "at91_mci" | |
81 | ||
df05a303 AV |
82 | #define FL_SENT_COMMAND (1 << 0) |
83 | #define FL_SENT_STOP (1 << 1) | |
65dbf343 | 84 | |
df05a303 AV |
85 | #define AT91_MCI_ERRORS (AT91_MCI_RINDE | AT91_MCI_RDIRE | AT91_MCI_RCRCE \ |
86 | | AT91_MCI_RENDE | AT91_MCI_RTOE | AT91_MCI_DCRCE \ | |
37b758e8 | 87 | | AT91_MCI_DTOE | AT91_MCI_OVRE | AT91_MCI_UNRE) |
65dbf343 | 88 | |
e0b19b83 AV |
89 | #define at91_mci_read(host, reg) __raw_readl((host)->baseaddr + (reg)) |
90 | #define at91_mci_write(host, reg, val) __raw_writel((val), (host)->baseaddr + (reg)) | |
65dbf343 | 91 | |
65dbf343 AV |
92 | |
93 | /* | |
94 | * Low level type for this driver | |
95 | */ | |
96 | struct at91mci_host | |
97 | { | |
98 | struct mmc_host *mmc; | |
99 | struct mmc_command *cmd; | |
100 | struct mmc_request *request; | |
101 | ||
e0b19b83 | 102 | void __iomem *baseaddr; |
17ea0595 | 103 | int irq; |
e0b19b83 | 104 | |
65dbf343 AV |
105 | struct at91_mmc_data *board; |
106 | int present; | |
107 | ||
3dd3b039 AV |
108 | struct clk *mci_clk; |
109 | ||
65dbf343 AV |
110 | /* |
111 | * Flag indicating when the command has been sent. This is used to | |
112 | * work out whether or not to send the stop | |
113 | */ | |
114 | unsigned int flags; | |
115 | /* flag for current bus settings */ | |
116 | u32 bus_mode; | |
117 | ||
118 | /* DMA buffer used for transmitting */ | |
119 | unsigned int* buffer; | |
120 | dma_addr_t physical_address; | |
121 | unsigned int total_length; | |
122 | ||
123 | /* Latest in the scatterlist that has been enabled for transfer, but not freed */ | |
124 | int in_use_index; | |
125 | ||
126 | /* Latest in the scatterlist that has been enabled for transfer */ | |
127 | int transfer_index; | |
128 | }; | |
129 | ||
130 | /* | |
131 | * Copy from sg to a dma block - used for transfers | |
132 | */ | |
e8d04d3d | 133 | static inline void at91_mci_sg_to_dma(struct at91mci_host *host, struct mmc_data *data) |
65dbf343 AV |
134 | { |
135 | unsigned int len, i, size; | |
136 | unsigned *dmabuf = host->buffer; | |
137 | ||
138 | size = host->total_length; | |
139 | len = data->sg_len; | |
140 | ||
141 | /* | |
142 | * Just loop through all entries. Size might not | |
143 | * be the entire list though so make sure that | |
144 | * we do not transfer too much. | |
145 | */ | |
146 | for (i = 0; i < len; i++) { | |
147 | struct scatterlist *sg; | |
148 | int amount; | |
65dbf343 AV |
149 | unsigned int *sgbuffer; |
150 | ||
151 | sg = &data->sg[i]; | |
152 | ||
45711f1a | 153 | sgbuffer = kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset; |
65dbf343 AV |
154 | amount = min(size, sg->length); |
155 | size -= amount; | |
65dbf343 | 156 | |
99eeb8df AV |
157 | if (cpu_is_at91rm9200()) { /* AT91RM9200 errata */ |
158 | int index; | |
159 | ||
160 | for (index = 0; index < (amount / 4); index++) | |
161 | *dmabuf++ = swab32(sgbuffer[index]); | |
162 | } | |
163 | else | |
164 | memcpy(dmabuf, sgbuffer, amount); | |
65dbf343 AV |
165 | |
166 | kunmap_atomic(sgbuffer, KM_BIO_SRC_IRQ); | |
167 | ||
168 | if (size == 0) | |
169 | break; | |
170 | } | |
171 | ||
172 | /* | |
173 | * Check that we didn't get a request to transfer | |
174 | * more data than can fit into the SG list. | |
175 | */ | |
176 | BUG_ON(size != 0); | |
177 | } | |
178 | ||
179 | /* | |
180 | * Prepare a dma read | |
181 | */ | |
e8d04d3d | 182 | static void at91_mci_pre_dma_read(struct at91mci_host *host) |
65dbf343 AV |
183 | { |
184 | int i; | |
185 | struct scatterlist *sg; | |
186 | struct mmc_command *cmd; | |
187 | struct mmc_data *data; | |
188 | ||
b44fb7a0 | 189 | pr_debug("pre dma read\n"); |
65dbf343 AV |
190 | |
191 | cmd = host->cmd; | |
192 | if (!cmd) { | |
b44fb7a0 | 193 | pr_debug("no command\n"); |
65dbf343 AV |
194 | return; |
195 | } | |
196 | ||
197 | data = cmd->data; | |
198 | if (!data) { | |
b44fb7a0 | 199 | pr_debug("no data\n"); |
65dbf343 AV |
200 | return; |
201 | } | |
202 | ||
203 | for (i = 0; i < 2; i++) { | |
204 | /* nothing left to transfer */ | |
205 | if (host->transfer_index >= data->sg_len) { | |
b44fb7a0 | 206 | pr_debug("Nothing left to transfer (index = %d)\n", host->transfer_index); |
65dbf343 AV |
207 | break; |
208 | } | |
209 | ||
210 | /* Check to see if this needs filling */ | |
211 | if (i == 0) { | |
93a3ddc2 | 212 | if (at91_mci_read(host, ATMEL_PDC_RCR) != 0) { |
b44fb7a0 | 213 | pr_debug("Transfer active in current\n"); |
65dbf343 AV |
214 | continue; |
215 | } | |
216 | } | |
217 | else { | |
93a3ddc2 | 218 | if (at91_mci_read(host, ATMEL_PDC_RNCR) != 0) { |
b44fb7a0 | 219 | pr_debug("Transfer active in next\n"); |
65dbf343 AV |
220 | continue; |
221 | } | |
222 | } | |
223 | ||
224 | /* Setup the next transfer */ | |
b44fb7a0 | 225 | pr_debug("Using transfer index %d\n", host->transfer_index); |
65dbf343 AV |
226 | |
227 | sg = &data->sg[host->transfer_index++]; | |
b44fb7a0 | 228 | pr_debug("sg = %p\n", sg); |
65dbf343 | 229 | |
45711f1a | 230 | sg->dma_address = dma_map_page(NULL, sg_page(sg), sg->offset, sg->length, DMA_FROM_DEVICE); |
65dbf343 | 231 | |
b44fb7a0 | 232 | pr_debug("dma address = %08X, length = %d\n", sg->dma_address, sg->length); |
65dbf343 AV |
233 | |
234 | if (i == 0) { | |
93a3ddc2 | 235 | at91_mci_write(host, ATMEL_PDC_RPR, sg->dma_address); |
80f92546 | 236 | at91_mci_write(host, ATMEL_PDC_RCR, (data->blksz & 0x3) ? sg->length : sg->length / 4); |
65dbf343 AV |
237 | } |
238 | else { | |
93a3ddc2 | 239 | at91_mci_write(host, ATMEL_PDC_RNPR, sg->dma_address); |
80f92546 | 240 | at91_mci_write(host, ATMEL_PDC_RNCR, (data->blksz & 0x3) ? sg->length : sg->length / 4); |
65dbf343 AV |
241 | } |
242 | } | |
243 | ||
b44fb7a0 | 244 | pr_debug("pre dma read done\n"); |
65dbf343 AV |
245 | } |
246 | ||
247 | /* | |
248 | * Handle after a dma read | |
249 | */ | |
e8d04d3d | 250 | static void at91_mci_post_dma_read(struct at91mci_host *host) |
65dbf343 AV |
251 | { |
252 | struct mmc_command *cmd; | |
253 | struct mmc_data *data; | |
254 | ||
b44fb7a0 | 255 | pr_debug("post dma read\n"); |
65dbf343 AV |
256 | |
257 | cmd = host->cmd; | |
258 | if (!cmd) { | |
b44fb7a0 | 259 | pr_debug("no command\n"); |
65dbf343 AV |
260 | return; |
261 | } | |
262 | ||
263 | data = cmd->data; | |
264 | if (!data) { | |
b44fb7a0 | 265 | pr_debug("no data\n"); |
65dbf343 AV |
266 | return; |
267 | } | |
268 | ||
269 | while (host->in_use_index < host->transfer_index) { | |
65dbf343 AV |
270 | struct scatterlist *sg; |
271 | ||
b44fb7a0 | 272 | pr_debug("finishing index %d\n", host->in_use_index); |
65dbf343 AV |
273 | |
274 | sg = &data->sg[host->in_use_index++]; | |
275 | ||
b44fb7a0 | 276 | pr_debug("Unmapping page %08X\n", sg->dma_address); |
65dbf343 AV |
277 | |
278 | dma_unmap_page(NULL, sg->dma_address, sg->length, DMA_FROM_DEVICE); | |
279 | ||
65dbf343 AV |
280 | data->bytes_xfered += sg->length; |
281 | ||
99eeb8df | 282 | if (cpu_is_at91rm9200()) { /* AT91RM9200 errata */ |
ed99c541 | 283 | unsigned int *buffer; |
99eeb8df | 284 | int index; |
65dbf343 | 285 | |
ed99c541 | 286 | /* Swap the contents of the buffer */ |
45711f1a | 287 | buffer = kmap_atomic(sg_page(sg), KM_BIO_SRC_IRQ) + sg->offset; |
ed99c541 NF |
288 | pr_debug("buffer = %p, length = %d\n", buffer, sg->length); |
289 | ||
99eeb8df AV |
290 | for (index = 0; index < (sg->length / 4); index++) |
291 | buffer[index] = swab32(buffer[index]); | |
ed99c541 NF |
292 | |
293 | kunmap_atomic(buffer, KM_BIO_SRC_IRQ); | |
65dbf343 | 294 | } |
99eeb8df | 295 | |
45711f1a | 296 | flush_dcache_page(sg_page(sg)); |
65dbf343 AV |
297 | } |
298 | ||
299 | /* Is there another transfer to trigger? */ | |
300 | if (host->transfer_index < data->sg_len) | |
e8d04d3d | 301 | at91_mci_pre_dma_read(host); |
65dbf343 | 302 | else { |
ed99c541 | 303 | at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_ENDRX); |
e0b19b83 | 304 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_RXBUFF); |
65dbf343 AV |
305 | } |
306 | ||
b44fb7a0 | 307 | pr_debug("post dma read done\n"); |
65dbf343 AV |
308 | } |
309 | ||
310 | /* | |
311 | * Handle transmitted data | |
312 | */ | |
313 | static void at91_mci_handle_transmitted(struct at91mci_host *host) | |
314 | { | |
315 | struct mmc_command *cmd; | |
316 | struct mmc_data *data; | |
317 | ||
b44fb7a0 | 318 | pr_debug("Handling the transmit\n"); |
65dbf343 AV |
319 | |
320 | /* Disable the transfer */ | |
93a3ddc2 | 321 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS); |
65dbf343 AV |
322 | |
323 | /* Now wait for cmd ready */ | |
e0b19b83 | 324 | at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_TXBUFE); |
65dbf343 AV |
325 | |
326 | cmd = host->cmd; | |
327 | if (!cmd) return; | |
328 | ||
329 | data = cmd->data; | |
330 | if (!data) return; | |
331 | ||
be0192aa | 332 | if (cmd->data->blocks > 1) { |
ed99c541 NF |
333 | pr_debug("multiple write : wait for BLKE...\n"); |
334 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_BLKE); | |
335 | } else | |
336 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_NOTBUSY); | |
337 | ||
65dbf343 AV |
338 | data->bytes_xfered = host->total_length; |
339 | } | |
340 | ||
ed99c541 NF |
341 | /*Handle after command sent ready*/ |
342 | static int at91_mci_handle_cmdrdy(struct at91mci_host *host) | |
343 | { | |
344 | if (!host->cmd) | |
345 | return 1; | |
346 | else if (!host->cmd->data) { | |
347 | if (host->flags & FL_SENT_STOP) { | |
348 | /*After multi block write, we must wait for NOTBUSY*/ | |
349 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_NOTBUSY); | |
350 | } else return 1; | |
351 | } else if (host->cmd->data->flags & MMC_DATA_WRITE) { | |
352 | /*After sendding multi-block-write command, start DMA transfer*/ | |
353 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_TXBUFE); | |
354 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_BLKE); | |
355 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN); | |
356 | } | |
357 | ||
358 | /* command not completed, have to wait */ | |
359 | return 0; | |
360 | } | |
361 | ||
362 | ||
65dbf343 AV |
363 | /* |
364 | * Enable the controller | |
365 | */ | |
e0b19b83 | 366 | static void at91_mci_enable(struct at91mci_host *host) |
65dbf343 | 367 | { |
ed99c541 NF |
368 | unsigned int mr; |
369 | ||
e0b19b83 | 370 | at91_mci_write(host, AT91_MCI_CR, AT91_MCI_MCIEN); |
f3a8efa9 | 371 | at91_mci_write(host, AT91_MCI_IDR, 0xffffffff); |
e0b19b83 | 372 | at91_mci_write(host, AT91_MCI_DTOR, AT91_MCI_DTOMUL_1M | AT91_MCI_DTOCYC); |
ed99c541 NF |
373 | mr = AT91_MCI_PDCMODE | 0x34a; |
374 | ||
375 | if (cpu_is_at91sam9260() || cpu_is_at91sam9263()) | |
376 | mr |= AT91_MCI_RDPROOF | AT91_MCI_WRPROOF; | |
377 | ||
378 | at91_mci_write(host, AT91_MCI_MR, mr); | |
99eeb8df AV |
379 | |
380 | /* use Slot A or B (only one at same time) */ | |
381 | at91_mci_write(host, AT91_MCI_SDCR, host->board->slot_b); | |
65dbf343 AV |
382 | } |
383 | ||
384 | /* | |
385 | * Disable the controller | |
386 | */ | |
e0b19b83 | 387 | static void at91_mci_disable(struct at91mci_host *host) |
65dbf343 | 388 | { |
e0b19b83 | 389 | at91_mci_write(host, AT91_MCI_CR, AT91_MCI_MCIDIS | AT91_MCI_SWRST); |
65dbf343 AV |
390 | } |
391 | ||
392 | /* | |
393 | * Send a command | |
65dbf343 | 394 | */ |
ed99c541 | 395 | static void at91_mci_send_command(struct at91mci_host *host, struct mmc_command *cmd) |
65dbf343 AV |
396 | { |
397 | unsigned int cmdr, mr; | |
398 | unsigned int block_length; | |
399 | struct mmc_data *data = cmd->data; | |
400 | ||
401 | unsigned int blocks; | |
402 | unsigned int ier = 0; | |
403 | ||
404 | host->cmd = cmd; | |
405 | ||
ed99c541 | 406 | /* Needed for leaving busy state before CMD1 */ |
e0b19b83 | 407 | if ((at91_mci_read(host, AT91_MCI_SR) & AT91_MCI_RTOE) && (cmd->opcode == 1)) { |
b44fb7a0 | 408 | pr_debug("Clearing timeout\n"); |
e0b19b83 AV |
409 | at91_mci_write(host, AT91_MCI_ARGR, 0); |
410 | at91_mci_write(host, AT91_MCI_CMDR, AT91_MCI_OPDCMD); | |
411 | while (!(at91_mci_read(host, AT91_MCI_SR) & AT91_MCI_CMDRDY)) { | |
65dbf343 | 412 | /* spin */ |
e0b19b83 | 413 | pr_debug("Clearing: SR = %08X\n", at91_mci_read(host, AT91_MCI_SR)); |
65dbf343 AV |
414 | } |
415 | } | |
ed99c541 | 416 | |
65dbf343 AV |
417 | cmdr = cmd->opcode; |
418 | ||
419 | if (mmc_resp_type(cmd) == MMC_RSP_NONE) | |
420 | cmdr |= AT91_MCI_RSPTYP_NONE; | |
421 | else { | |
422 | /* if a response is expected then allow maximum response latancy */ | |
423 | cmdr |= AT91_MCI_MAXLAT; | |
424 | /* set 136 bit response for R2, 48 bit response otherwise */ | |
425 | if (mmc_resp_type(cmd) == MMC_RSP_R2) | |
426 | cmdr |= AT91_MCI_RSPTYP_136; | |
427 | else | |
428 | cmdr |= AT91_MCI_RSPTYP_48; | |
429 | } | |
430 | ||
431 | if (data) { | |
1d4de9ed | 432 | |
80f92546 | 433 | if ( cpu_is_at91rm9200() && (data->blksz & 0x3) ) { |
1d4de9ed MP |
434 | pr_debug("Unsupported block size\n"); |
435 | cmd->error = -EINVAL; | |
436 | mmc_request_done(host->mmc, host->request); | |
437 | return; | |
438 | } | |
439 | ||
a3fd4a1b | 440 | block_length = data->blksz; |
65dbf343 AV |
441 | blocks = data->blocks; |
442 | ||
443 | /* always set data start - also set direction flag for read */ | |
444 | if (data->flags & MMC_DATA_READ) | |
445 | cmdr |= (AT91_MCI_TRDIR | AT91_MCI_TRCMD_START); | |
446 | else if (data->flags & MMC_DATA_WRITE) | |
447 | cmdr |= AT91_MCI_TRCMD_START; | |
448 | ||
449 | if (data->flags & MMC_DATA_STREAM) | |
450 | cmdr |= AT91_MCI_TRTYP_STREAM; | |
be0192aa | 451 | if (data->blocks > 1) |
65dbf343 AV |
452 | cmdr |= AT91_MCI_TRTYP_MULTIPLE; |
453 | } | |
454 | else { | |
455 | block_length = 0; | |
456 | blocks = 0; | |
457 | } | |
458 | ||
b6cedb38 | 459 | if (host->flags & FL_SENT_STOP) |
65dbf343 AV |
460 | cmdr |= AT91_MCI_TRCMD_STOP; |
461 | ||
462 | if (host->bus_mode == MMC_BUSMODE_OPENDRAIN) | |
463 | cmdr |= AT91_MCI_OPDCMD; | |
464 | ||
465 | /* | |
466 | * Set the arguments and send the command | |
467 | */ | |
f3a8efa9 | 468 | pr_debug("Sending command %d as %08X, arg = %08X, blocks = %d, length = %d (MR = %08X)\n", |
e0b19b83 | 469 | cmd->opcode, cmdr, cmd->arg, blocks, block_length, at91_mci_read(host, AT91_MCI_MR)); |
65dbf343 AV |
470 | |
471 | if (!data) { | |
93a3ddc2 AV |
472 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_TXTDIS | ATMEL_PDC_RXTDIS); |
473 | at91_mci_write(host, ATMEL_PDC_RPR, 0); | |
474 | at91_mci_write(host, ATMEL_PDC_RCR, 0); | |
475 | at91_mci_write(host, ATMEL_PDC_RNPR, 0); | |
476 | at91_mci_write(host, ATMEL_PDC_RNCR, 0); | |
477 | at91_mci_write(host, ATMEL_PDC_TPR, 0); | |
478 | at91_mci_write(host, ATMEL_PDC_TCR, 0); | |
479 | at91_mci_write(host, ATMEL_PDC_TNPR, 0); | |
480 | at91_mci_write(host, ATMEL_PDC_TNCR, 0); | |
ed99c541 NF |
481 | ier = AT91_MCI_CMDRDY; |
482 | } else { | |
483 | /* zero block length and PDC mode */ | |
484 | mr = at91_mci_read(host, AT91_MCI_MR) & 0x7fff; | |
80f92546 MP |
485 | mr |= (data->blksz & 0x3) ? AT91_MCI_PDCFBYTE : 0; |
486 | mr |= (block_length << 16); | |
487 | mr |= AT91_MCI_PDCMODE; | |
488 | at91_mci_write(host, AT91_MCI_MR, mr); | |
e0b19b83 | 489 | |
ed99c541 NF |
490 | /* |
491 | * Disable the PDC controller | |
492 | */ | |
493 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS); | |
65dbf343 | 494 | |
ed99c541 NF |
495 | if (cmdr & AT91_MCI_TRCMD_START) { |
496 | data->bytes_xfered = 0; | |
497 | host->transfer_index = 0; | |
498 | host->in_use_index = 0; | |
499 | if (cmdr & AT91_MCI_TRDIR) { | |
500 | /* | |
501 | * Handle a read | |
502 | */ | |
503 | host->buffer = NULL; | |
504 | host->total_length = 0; | |
505 | ||
506 | at91_mci_pre_dma_read(host); | |
507 | ier = AT91_MCI_ENDRX /* | AT91_MCI_RXBUFF */; | |
508 | } | |
509 | else { | |
510 | /* | |
511 | * Handle a write | |
512 | */ | |
513 | host->total_length = block_length * blocks; | |
514 | host->buffer = dma_alloc_coherent(NULL, | |
515 | host->total_length, | |
516 | &host->physical_address, GFP_KERNEL); | |
517 | ||
518 | at91_mci_sg_to_dma(host, data); | |
519 | ||
520 | pr_debug("Transmitting %d bytes\n", host->total_length); | |
521 | ||
522 | at91_mci_write(host, ATMEL_PDC_TPR, host->physical_address); | |
80f92546 MP |
523 | at91_mci_write(host, ATMEL_PDC_TCR, (data->blksz & 0x3) ? |
524 | host->total_length : host->total_length / 4); | |
525 | ||
ed99c541 NF |
526 | ier = AT91_MCI_CMDRDY; |
527 | } | |
65dbf343 AV |
528 | } |
529 | } | |
530 | ||
531 | /* | |
532 | * Send the command and then enable the PDC - not the other way round as | |
533 | * the data sheet says | |
534 | */ | |
535 | ||
e0b19b83 AV |
536 | at91_mci_write(host, AT91_MCI_ARGR, cmd->arg); |
537 | at91_mci_write(host, AT91_MCI_CMDR, cmdr); | |
65dbf343 AV |
538 | |
539 | if (cmdr & AT91_MCI_TRCMD_START) { | |
540 | if (cmdr & AT91_MCI_TRDIR) | |
93a3ddc2 | 541 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTEN); |
65dbf343 | 542 | } |
65dbf343 | 543 | |
ed99c541 | 544 | /* Enable selected interrupts */ |
df05a303 | 545 | at91_mci_write(host, AT91_MCI_IER, AT91_MCI_ERRORS | ier); |
65dbf343 AV |
546 | } |
547 | ||
548 | /* | |
549 | * Process the next step in the request | |
550 | */ | |
e8d04d3d | 551 | static void at91_mci_process_next(struct at91mci_host *host) |
65dbf343 AV |
552 | { |
553 | if (!(host->flags & FL_SENT_COMMAND)) { | |
554 | host->flags |= FL_SENT_COMMAND; | |
ed99c541 | 555 | at91_mci_send_command(host, host->request->cmd); |
65dbf343 AV |
556 | } |
557 | else if ((!(host->flags & FL_SENT_STOP)) && host->request->stop) { | |
558 | host->flags |= FL_SENT_STOP; | |
ed99c541 | 559 | at91_mci_send_command(host, host->request->stop); |
65dbf343 AV |
560 | } |
561 | else | |
562 | mmc_request_done(host->mmc, host->request); | |
563 | } | |
564 | ||
565 | /* | |
566 | * Handle a command that has been completed | |
567 | */ | |
e8d04d3d | 568 | static void at91_mci_completed_command(struct at91mci_host *host) |
65dbf343 AV |
569 | { |
570 | struct mmc_command *cmd = host->cmd; | |
571 | unsigned int status; | |
572 | ||
e0b19b83 | 573 | at91_mci_write(host, AT91_MCI_IDR, 0xffffffff); |
65dbf343 | 574 | |
e0b19b83 AV |
575 | cmd->resp[0] = at91_mci_read(host, AT91_MCI_RSPR(0)); |
576 | cmd->resp[1] = at91_mci_read(host, AT91_MCI_RSPR(1)); | |
577 | cmd->resp[2] = at91_mci_read(host, AT91_MCI_RSPR(2)); | |
578 | cmd->resp[3] = at91_mci_read(host, AT91_MCI_RSPR(3)); | |
65dbf343 AV |
579 | |
580 | if (host->buffer) { | |
581 | dma_free_coherent(NULL, host->total_length, host->buffer, host->physical_address); | |
582 | host->buffer = NULL; | |
583 | } | |
584 | ||
e0b19b83 | 585 | status = at91_mci_read(host, AT91_MCI_SR); |
65dbf343 | 586 | |
b44fb7a0 | 587 | pr_debug("Status = %08X [%08X %08X %08X %08X]\n", |
65dbf343 AV |
588 | status, cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]); |
589 | ||
9e3866b5 | 590 | if (status & AT91_MCI_ERRORS) { |
b6cedb38 | 591 | if ((status & AT91_MCI_RCRCE) && !(mmc_resp_type(cmd) & MMC_RSP_CRC)) { |
17b0429d | 592 | cmd->error = 0; |
65dbf343 AV |
593 | } |
594 | else { | |
595 | if (status & (AT91_MCI_RTOE | AT91_MCI_DTOE)) | |
17b0429d | 596 | cmd->error = -ETIMEDOUT; |
65dbf343 | 597 | else if (status & (AT91_MCI_RCRCE | AT91_MCI_DCRCE)) |
17b0429d | 598 | cmd->error = -EILSEQ; |
65dbf343 | 599 | else |
17b0429d | 600 | cmd->error = -EIO; |
65dbf343 | 601 | |
b44fb7a0 | 602 | pr_debug("Error detected and set to %d (cmd = %d, retries = %d)\n", |
65dbf343 AV |
603 | cmd->error, cmd->opcode, cmd->retries); |
604 | } | |
605 | } | |
606 | else | |
17b0429d | 607 | cmd->error = 0; |
65dbf343 | 608 | |
e8d04d3d | 609 | at91_mci_process_next(host); |
65dbf343 AV |
610 | } |
611 | ||
612 | /* | |
613 | * Handle an MMC request | |
614 | */ | |
615 | static void at91_mci_request(struct mmc_host *mmc, struct mmc_request *mrq) | |
616 | { | |
617 | struct at91mci_host *host = mmc_priv(mmc); | |
618 | host->request = mrq; | |
619 | host->flags = 0; | |
620 | ||
e8d04d3d | 621 | at91_mci_process_next(host); |
65dbf343 AV |
622 | } |
623 | ||
624 | /* | |
625 | * Set the IOS | |
626 | */ | |
627 | static void at91_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) | |
628 | { | |
629 | int clkdiv; | |
630 | struct at91mci_host *host = mmc_priv(mmc); | |
3dd3b039 | 631 | unsigned long at91_master_clock = clk_get_rate(host->mci_clk); |
65dbf343 | 632 | |
b44fb7a0 | 633 | host->bus_mode = ios->bus_mode; |
65dbf343 AV |
634 | |
635 | if (ios->clock == 0) { | |
636 | /* Disable the MCI controller */ | |
e0b19b83 | 637 | at91_mci_write(host, AT91_MCI_CR, AT91_MCI_MCIDIS); |
65dbf343 AV |
638 | clkdiv = 0; |
639 | } | |
640 | else { | |
641 | /* Enable the MCI controller */ | |
e0b19b83 | 642 | at91_mci_write(host, AT91_MCI_CR, AT91_MCI_MCIEN); |
65dbf343 AV |
643 | |
644 | if ((at91_master_clock % (ios->clock * 2)) == 0) | |
645 | clkdiv = ((at91_master_clock / ios->clock) / 2) - 1; | |
646 | else | |
647 | clkdiv = (at91_master_clock / ios->clock) / 2; | |
648 | ||
b44fb7a0 | 649 | pr_debug("clkdiv = %d. mcck = %ld\n", clkdiv, |
65dbf343 AV |
650 | at91_master_clock / (2 * (clkdiv + 1))); |
651 | } | |
652 | if (ios->bus_width == MMC_BUS_WIDTH_4 && host->board->wire4) { | |
b44fb7a0 | 653 | pr_debug("MMC: Setting controller bus width to 4\n"); |
e0b19b83 | 654 | at91_mci_write(host, AT91_MCI_SDCR, at91_mci_read(host, AT91_MCI_SDCR) | AT91_MCI_SDCBUS); |
65dbf343 AV |
655 | } |
656 | else { | |
b44fb7a0 | 657 | pr_debug("MMC: Setting controller bus width to 1\n"); |
e0b19b83 | 658 | at91_mci_write(host, AT91_MCI_SDCR, at91_mci_read(host, AT91_MCI_SDCR) & ~AT91_MCI_SDCBUS); |
65dbf343 AV |
659 | } |
660 | ||
661 | /* Set the clock divider */ | |
e0b19b83 | 662 | at91_mci_write(host, AT91_MCI_MR, (at91_mci_read(host, AT91_MCI_MR) & ~AT91_MCI_CLKDIV) | clkdiv); |
65dbf343 AV |
663 | |
664 | /* maybe switch power to the card */ | |
b44fb7a0 | 665 | if (host->board->vcc_pin) { |
65dbf343 AV |
666 | switch (ios->power_mode) { |
667 | case MMC_POWER_OFF: | |
6e996ee8 | 668 | gpio_set_value(host->board->vcc_pin, 0); |
65dbf343 AV |
669 | break; |
670 | case MMC_POWER_UP: | |
6e996ee8 | 671 | gpio_set_value(host->board->vcc_pin, 1); |
65dbf343 | 672 | break; |
e5c0ef90 MP |
673 | case MMC_POWER_ON: |
674 | break; | |
675 | default: | |
676 | WARN_ON(1); | |
65dbf343 AV |
677 | } |
678 | } | |
679 | } | |
680 | ||
681 | /* | |
682 | * Handle an interrupt | |
683 | */ | |
7d12e780 | 684 | static irqreturn_t at91_mci_irq(int irq, void *devid) |
65dbf343 AV |
685 | { |
686 | struct at91mci_host *host = devid; | |
687 | int completed = 0; | |
df05a303 | 688 | unsigned int int_status, int_mask; |
65dbf343 | 689 | |
e0b19b83 | 690 | int_status = at91_mci_read(host, AT91_MCI_SR); |
df05a303 | 691 | int_mask = at91_mci_read(host, AT91_MCI_IMR); |
37b758e8 | 692 | |
f3a8efa9 | 693 | pr_debug("MCI irq: status = %08X, %08X, %08X\n", int_status, int_mask, |
df05a303 | 694 | int_status & int_mask); |
37b758e8 | 695 | |
df05a303 AV |
696 | int_status = int_status & int_mask; |
697 | ||
698 | if (int_status & AT91_MCI_ERRORS) { | |
65dbf343 | 699 | completed = 1; |
37b758e8 | 700 | |
df05a303 AV |
701 | if (int_status & AT91_MCI_UNRE) |
702 | pr_debug("MMC: Underrun error\n"); | |
703 | if (int_status & AT91_MCI_OVRE) | |
704 | pr_debug("MMC: Overrun error\n"); | |
705 | if (int_status & AT91_MCI_DTOE) | |
706 | pr_debug("MMC: Data timeout\n"); | |
707 | if (int_status & AT91_MCI_DCRCE) | |
708 | pr_debug("MMC: CRC error in data\n"); | |
709 | if (int_status & AT91_MCI_RTOE) | |
710 | pr_debug("MMC: Response timeout\n"); | |
711 | if (int_status & AT91_MCI_RENDE) | |
712 | pr_debug("MMC: Response end bit error\n"); | |
713 | if (int_status & AT91_MCI_RCRCE) | |
714 | pr_debug("MMC: Response CRC error\n"); | |
715 | if (int_status & AT91_MCI_RDIRE) | |
716 | pr_debug("MMC: Response direction error\n"); | |
717 | if (int_status & AT91_MCI_RINDE) | |
718 | pr_debug("MMC: Response index error\n"); | |
719 | } else { | |
720 | /* Only continue processing if no errors */ | |
65dbf343 | 721 | |
65dbf343 | 722 | if (int_status & AT91_MCI_TXBUFE) { |
b44fb7a0 | 723 | pr_debug("TX buffer empty\n"); |
65dbf343 AV |
724 | at91_mci_handle_transmitted(host); |
725 | } | |
726 | ||
ed99c541 NF |
727 | if (int_status & AT91_MCI_ENDRX) { |
728 | pr_debug("ENDRX\n"); | |
729 | at91_mci_post_dma_read(host); | |
730 | } | |
731 | ||
65dbf343 | 732 | if (int_status & AT91_MCI_RXBUFF) { |
b44fb7a0 | 733 | pr_debug("RX buffer full\n"); |
ed99c541 NF |
734 | at91_mci_write(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS); |
735 | at91_mci_write(host, AT91_MCI_IDR, AT91_MCI_RXBUFF | AT91_MCI_ENDRX); | |
736 | completed = 1; | |
65dbf343 AV |
737 | } |
738 | ||
df05a303 | 739 | if (int_status & AT91_MCI_ENDTX) |
b44fb7a0 | 740 | pr_debug("Transmit has ended\n"); |
65dbf343 | 741 | |
65dbf343 | 742 | if (int_status & AT91_MCI_NOTBUSY) { |
b44fb7a0 | 743 | pr_debug("Card is ready\n"); |
ed99c541 | 744 | completed = 1; |
65dbf343 AV |
745 | } |
746 | ||
df05a303 | 747 | if (int_status & AT91_MCI_DTIP) |
b44fb7a0 | 748 | pr_debug("Data transfer in progress\n"); |
65dbf343 | 749 | |
ed99c541 | 750 | if (int_status & AT91_MCI_BLKE) { |
b44fb7a0 | 751 | pr_debug("Block transfer has ended\n"); |
ed99c541 NF |
752 | completed = 1; |
753 | } | |
65dbf343 | 754 | |
df05a303 | 755 | if (int_status & AT91_MCI_TXRDY) |
b44fb7a0 | 756 | pr_debug("Ready to transmit\n"); |
65dbf343 | 757 | |
df05a303 | 758 | if (int_status & AT91_MCI_RXRDY) |
b44fb7a0 | 759 | pr_debug("Ready to receive\n"); |
65dbf343 AV |
760 | |
761 | if (int_status & AT91_MCI_CMDRDY) { | |
b44fb7a0 | 762 | pr_debug("Command ready\n"); |
ed99c541 | 763 | completed = at91_mci_handle_cmdrdy(host); |
65dbf343 AV |
764 | } |
765 | } | |
65dbf343 AV |
766 | |
767 | if (completed) { | |
b44fb7a0 | 768 | pr_debug("Completed command\n"); |
e0b19b83 | 769 | at91_mci_write(host, AT91_MCI_IDR, 0xffffffff); |
e8d04d3d | 770 | at91_mci_completed_command(host); |
df05a303 AV |
771 | } else |
772 | at91_mci_write(host, AT91_MCI_IDR, int_status); | |
65dbf343 AV |
773 | |
774 | return IRQ_HANDLED; | |
775 | } | |
776 | ||
7d12e780 | 777 | static irqreturn_t at91_mmc_det_irq(int irq, void *_host) |
65dbf343 AV |
778 | { |
779 | struct at91mci_host *host = _host; | |
6e996ee8 | 780 | int present = !gpio_get_value(irq_to_gpio(irq)); |
65dbf343 AV |
781 | |
782 | /* | |
783 | * we expect this irq on both insert and remove, | |
784 | * and use a short delay to debounce. | |
785 | */ | |
786 | if (present != host->present) { | |
787 | host->present = present; | |
b44fb7a0 | 788 | pr_debug("%s: card %s\n", mmc_hostname(host->mmc), |
65dbf343 AV |
789 | present ? "insert" : "remove"); |
790 | if (!present) { | |
b44fb7a0 | 791 | pr_debug("****** Resetting SD-card bus width ******\n"); |
99eeb8df | 792 | at91_mci_write(host, AT91_MCI_SDCR, at91_mci_read(host, AT91_MCI_SDCR) & ~AT91_MCI_SDCBUS); |
65dbf343 AV |
793 | } |
794 | mmc_detect_change(host->mmc, msecs_to_jiffies(100)); | |
795 | } | |
796 | return IRQ_HANDLED; | |
797 | } | |
798 | ||
a26b498c | 799 | static int at91_mci_get_ro(struct mmc_host *mmc) |
65dbf343 | 800 | { |
65dbf343 AV |
801 | struct at91mci_host *host = mmc_priv(mmc); |
802 | ||
08f80bb5 AV |
803 | if (host->board->wp_pin) |
804 | return !!gpio_get_value(host->board->wp_pin); | |
805 | /* | |
806 | * Board doesn't support read only detection; let the mmc core | |
807 | * decide what to do. | |
808 | */ | |
809 | return -ENOSYS; | |
65dbf343 AV |
810 | } |
811 | ||
ab7aefd0 | 812 | static const struct mmc_host_ops at91_mci_ops = { |
65dbf343 AV |
813 | .request = at91_mci_request, |
814 | .set_ios = at91_mci_set_ios, | |
815 | .get_ro = at91_mci_get_ro, | |
816 | }; | |
817 | ||
818 | /* | |
819 | * Probe for the device | |
820 | */ | |
a26b498c | 821 | static int __init at91_mci_probe(struct platform_device *pdev) |
65dbf343 AV |
822 | { |
823 | struct mmc_host *mmc; | |
824 | struct at91mci_host *host; | |
17ea0595 | 825 | struct resource *res; |
65dbf343 AV |
826 | int ret; |
827 | ||
17ea0595 AV |
828 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
829 | if (!res) | |
830 | return -ENXIO; | |
831 | ||
832 | if (!request_mem_region(res->start, res->end - res->start + 1, DRIVER_NAME)) | |
833 | return -EBUSY; | |
834 | ||
65dbf343 AV |
835 | mmc = mmc_alloc_host(sizeof(struct at91mci_host), &pdev->dev); |
836 | if (!mmc) { | |
6e996ee8 DB |
837 | ret = -ENOMEM; |
838 | dev_dbg(&pdev->dev, "couldn't allocate mmc host\n"); | |
839 | goto fail6; | |
65dbf343 AV |
840 | } |
841 | ||
842 | mmc->ops = &at91_mci_ops; | |
843 | mmc->f_min = 375000; | |
844 | mmc->f_max = 25000000; | |
845 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; | |
846 | ||
fe4a3c7a | 847 | mmc->max_blk_size = 4095; |
55db890a | 848 | mmc->max_blk_count = mmc->max_req_size; |
fe4a3c7a | 849 | |
65dbf343 AV |
850 | host = mmc_priv(mmc); |
851 | host->mmc = mmc; | |
852 | host->buffer = NULL; | |
853 | host->bus_mode = 0; | |
854 | host->board = pdev->dev.platform_data; | |
855 | if (host->board->wire4) { | |
ed99c541 NF |
856 | if (cpu_is_at91sam9260() || cpu_is_at91sam9263()) |
857 | mmc->caps |= MMC_CAP_4_BIT_DATA; | |
858 | else | |
6e996ee8 | 859 | dev_warn(&pdev->dev, "4 wire bus mode not supported" |
ed99c541 | 860 | " - using 1 wire\n"); |
65dbf343 AV |
861 | } |
862 | ||
6e996ee8 DB |
863 | /* |
864 | * Reserve GPIOs ... board init code makes sure these pins are set | |
865 | * up as GPIOs with the right direction (input, except for vcc) | |
866 | */ | |
867 | if (host->board->det_pin) { | |
868 | ret = gpio_request(host->board->det_pin, "mmc_detect"); | |
869 | if (ret < 0) { | |
870 | dev_dbg(&pdev->dev, "couldn't claim card detect pin\n"); | |
871 | goto fail5; | |
872 | } | |
873 | } | |
874 | if (host->board->wp_pin) { | |
875 | ret = gpio_request(host->board->wp_pin, "mmc_wp"); | |
876 | if (ret < 0) { | |
877 | dev_dbg(&pdev->dev, "couldn't claim wp sense pin\n"); | |
878 | goto fail4; | |
879 | } | |
880 | } | |
881 | if (host->board->vcc_pin) { | |
882 | ret = gpio_request(host->board->vcc_pin, "mmc_vcc"); | |
883 | if (ret < 0) { | |
884 | dev_dbg(&pdev->dev, "couldn't claim vcc switch pin\n"); | |
885 | goto fail3; | |
886 | } | |
887 | } | |
888 | ||
65dbf343 AV |
889 | /* |
890 | * Get Clock | |
891 | */ | |
3dd3b039 AV |
892 | host->mci_clk = clk_get(&pdev->dev, "mci_clk"); |
893 | if (IS_ERR(host->mci_clk)) { | |
6e996ee8 DB |
894 | ret = -ENODEV; |
895 | dev_dbg(&pdev->dev, "no mci_clk?\n"); | |
896 | goto fail2; | |
65dbf343 | 897 | } |
65dbf343 | 898 | |
17ea0595 AV |
899 | /* |
900 | * Map I/O region | |
901 | */ | |
902 | host->baseaddr = ioremap(res->start, res->end - res->start + 1); | |
903 | if (!host->baseaddr) { | |
6e996ee8 DB |
904 | ret = -ENOMEM; |
905 | goto fail1; | |
17ea0595 | 906 | } |
e0b19b83 AV |
907 | |
908 | /* | |
909 | * Reset hardware | |
910 | */ | |
3dd3b039 | 911 | clk_enable(host->mci_clk); /* Enable the peripheral clock */ |
e0b19b83 AV |
912 | at91_mci_disable(host); |
913 | at91_mci_enable(host); | |
914 | ||
65dbf343 AV |
915 | /* |
916 | * Allocate the MCI interrupt | |
917 | */ | |
17ea0595 | 918 | host->irq = platform_get_irq(pdev, 0); |
6e996ee8 DB |
919 | ret = request_irq(host->irq, at91_mci_irq, IRQF_SHARED, |
920 | mmc_hostname(mmc), host); | |
65dbf343 | 921 | if (ret) { |
6e996ee8 DB |
922 | dev_dbg(&pdev->dev, "request MCI interrupt failed\n"); |
923 | goto fail0; | |
65dbf343 AV |
924 | } |
925 | ||
926 | platform_set_drvdata(pdev, mmc); | |
927 | ||
928 | /* | |
929 | * Add host to MMC layer | |
930 | */ | |
63b66438 | 931 | if (host->board->det_pin) { |
6e996ee8 | 932 | host->present = !gpio_get_value(host->board->det_pin); |
63b66438 | 933 | } |
65dbf343 AV |
934 | else |
935 | host->present = -1; | |
936 | ||
937 | mmc_add_host(mmc); | |
938 | ||
939 | /* | |
940 | * monitor card insertion/removal if we can | |
941 | */ | |
942 | if (host->board->det_pin) { | |
6e996ee8 DB |
943 | ret = request_irq(gpio_to_irq(host->board->det_pin), |
944 | at91_mmc_det_irq, 0, mmc_hostname(mmc), host); | |
65dbf343 | 945 | if (ret) |
6e996ee8 DB |
946 | dev_warn(&pdev->dev, "request MMC detect irq failed\n"); |
947 | else | |
948 | device_init_wakeup(&pdev->dev, 1); | |
65dbf343 AV |
949 | } |
950 | ||
f3a8efa9 | 951 | pr_debug("Added MCI driver\n"); |
65dbf343 AV |
952 | |
953 | return 0; | |
6e996ee8 DB |
954 | |
955 | fail0: | |
956 | clk_disable(host->mci_clk); | |
957 | iounmap(host->baseaddr); | |
958 | fail1: | |
959 | clk_put(host->mci_clk); | |
960 | fail2: | |
961 | if (host->board->vcc_pin) | |
962 | gpio_free(host->board->vcc_pin); | |
963 | fail3: | |
964 | if (host->board->wp_pin) | |
965 | gpio_free(host->board->wp_pin); | |
966 | fail4: | |
967 | if (host->board->det_pin) | |
968 | gpio_free(host->board->det_pin); | |
969 | fail5: | |
970 | mmc_free_host(mmc); | |
971 | fail6: | |
972 | release_mem_region(res->start, res->end - res->start + 1); | |
973 | dev_err(&pdev->dev, "probe failed, err %d\n", ret); | |
974 | return ret; | |
65dbf343 AV |
975 | } |
976 | ||
977 | /* | |
978 | * Remove a device | |
979 | */ | |
a26b498c | 980 | static int __exit at91_mci_remove(struct platform_device *pdev) |
65dbf343 AV |
981 | { |
982 | struct mmc_host *mmc = platform_get_drvdata(pdev); | |
983 | struct at91mci_host *host; | |
17ea0595 | 984 | struct resource *res; |
65dbf343 AV |
985 | |
986 | if (!mmc) | |
987 | return -1; | |
988 | ||
989 | host = mmc_priv(mmc); | |
990 | ||
e0cda54e | 991 | if (host->board->det_pin) { |
6e996ee8 DB |
992 | if (device_can_wakeup(&pdev->dev)) |
993 | free_irq(gpio_to_irq(host->board->det_pin), host); | |
63b66438 | 994 | device_init_wakeup(&pdev->dev, 0); |
6e996ee8 | 995 | gpio_free(host->board->det_pin); |
65dbf343 AV |
996 | } |
997 | ||
e0b19b83 | 998 | at91_mci_disable(host); |
17ea0595 AV |
999 | mmc_remove_host(mmc); |
1000 | free_irq(host->irq, host); | |
65dbf343 | 1001 | |
3dd3b039 AV |
1002 | clk_disable(host->mci_clk); /* Disable the peripheral clock */ |
1003 | clk_put(host->mci_clk); | |
65dbf343 | 1004 | |
6e996ee8 DB |
1005 | if (host->board->vcc_pin) |
1006 | gpio_free(host->board->vcc_pin); | |
1007 | if (host->board->wp_pin) | |
1008 | gpio_free(host->board->wp_pin); | |
1009 | ||
17ea0595 AV |
1010 | iounmap(host->baseaddr); |
1011 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1012 | release_mem_region(res->start, res->end - res->start + 1); | |
65dbf343 | 1013 | |
17ea0595 AV |
1014 | mmc_free_host(mmc); |
1015 | platform_set_drvdata(pdev, NULL); | |
b44fb7a0 | 1016 | pr_debug("MCI Removed\n"); |
65dbf343 AV |
1017 | |
1018 | return 0; | |
1019 | } | |
1020 | ||
1021 | #ifdef CONFIG_PM | |
1022 | static int at91_mci_suspend(struct platform_device *pdev, pm_message_t state) | |
1023 | { | |
1024 | struct mmc_host *mmc = platform_get_drvdata(pdev); | |
63b66438 | 1025 | struct at91mci_host *host = mmc_priv(mmc); |
65dbf343 AV |
1026 | int ret = 0; |
1027 | ||
e0cda54e | 1028 | if (host->board->det_pin && device_may_wakeup(&pdev->dev)) |
63b66438 MP |
1029 | enable_irq_wake(host->board->det_pin); |
1030 | ||
65dbf343 AV |
1031 | if (mmc) |
1032 | ret = mmc_suspend_host(mmc, state); | |
1033 | ||
1034 | return ret; | |
1035 | } | |
1036 | ||
1037 | static int at91_mci_resume(struct platform_device *pdev) | |
1038 | { | |
1039 | struct mmc_host *mmc = platform_get_drvdata(pdev); | |
63b66438 | 1040 | struct at91mci_host *host = mmc_priv(mmc); |
65dbf343 AV |
1041 | int ret = 0; |
1042 | ||
e0cda54e | 1043 | if (host->board->det_pin && device_may_wakeup(&pdev->dev)) |
63b66438 MP |
1044 | disable_irq_wake(host->board->det_pin); |
1045 | ||
65dbf343 AV |
1046 | if (mmc) |
1047 | ret = mmc_resume_host(mmc); | |
1048 | ||
1049 | return ret; | |
1050 | } | |
1051 | #else | |
1052 | #define at91_mci_suspend NULL | |
1053 | #define at91_mci_resume NULL | |
1054 | #endif | |
1055 | ||
1056 | static struct platform_driver at91_mci_driver = { | |
a26b498c | 1057 | .remove = __exit_p(at91_mci_remove), |
65dbf343 AV |
1058 | .suspend = at91_mci_suspend, |
1059 | .resume = at91_mci_resume, | |
1060 | .driver = { | |
1061 | .name = DRIVER_NAME, | |
1062 | .owner = THIS_MODULE, | |
1063 | }, | |
1064 | }; | |
1065 | ||
1066 | static int __init at91_mci_init(void) | |
1067 | { | |
a26b498c | 1068 | return platform_driver_probe(&at91_mci_driver, at91_mci_probe); |
65dbf343 AV |
1069 | } |
1070 | ||
1071 | static void __exit at91_mci_exit(void) | |
1072 | { | |
1073 | platform_driver_unregister(&at91_mci_driver); | |
1074 | } | |
1075 | ||
1076 | module_init(at91_mci_init); | |
1077 | module_exit(at91_mci_exit); | |
1078 | ||
1079 | MODULE_DESCRIPTION("AT91 Multimedia Card Interface driver"); | |
1080 | MODULE_AUTHOR("Nick Randell"); | |
1081 | MODULE_LICENSE("GPL"); | |
bc65c724 | 1082 | MODULE_ALIAS("platform:at91_mci"); |