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ba264b34 | 1 | /* |
70f10482 | 2 | * linux/drivers/mmc/host/au1xmmc.c - AU1XX0 MMC driver |
ba264b34 PP |
3 | * |
4 | * Copyright (c) 2005, Advanced Micro Devices, Inc. | |
5 | * | |
6 | * Developed with help from the 2.4.30 MMC AU1XXX controller including | |
7 | * the following copyright notices: | |
8 | * Copyright (c) 2003-2004 Embedded Edge, LLC. | |
9 | * Portions Copyright (C) 2002 Embedix, Inc | |
10 | * Copyright 2002 Hewlett-Packard Company | |
11 | ||
12 | * 2.6 version of this driver inspired by: | |
13 | * (drivers/mmc/wbsd.c) Copyright (C) 2004-2005 Pierre Ossman, | |
14 | * All Rights Reserved. | |
15 | * (drivers/mmc/pxa.c) Copyright (C) 2003 Russell King, | |
16 | * All Rights Reserved. | |
17 | * | |
18 | ||
19 | * This program is free software; you can redistribute it and/or modify | |
20 | * it under the terms of the GNU General Public License version 2 as | |
21 | * published by the Free Software Foundation. | |
22 | */ | |
23 | ||
24 | /* Why is a timer used to detect insert events? | |
25 | * | |
26 | * From the AU1100 MMC application guide: | |
27 | * If the Au1100-based design is intended to support both MultiMediaCards | |
28 | * and 1- or 4-data bit SecureDigital cards, then the solution is to | |
29 | * connect a weak (560KOhm) pull-up resistor to connector pin 1. | |
30 | * In doing so, a MMC card never enters SPI-mode communications, | |
31 | * but now the SecureDigital card-detect feature of CD/DAT3 is ineffective | |
32 | * (the low to high transition will not occur). | |
33 | * | |
34 | * So we use the timer to check the status manually. | |
35 | */ | |
36 | ||
ba264b34 PP |
37 | #include <linux/module.h> |
38 | #include <linux/init.h> | |
b256f9df | 39 | #include <linux/platform_device.h> |
ba264b34 PP |
40 | #include <linux/mm.h> |
41 | #include <linux/interrupt.h> | |
42 | #include <linux/dma-mapping.h> | |
0ada7a02 | 43 | #include <linux/scatterlist.h> |
c4223c2c | 44 | #include <linux/leds.h> |
ba264b34 | 45 | #include <linux/mmc/host.h> |
c4223c2c | 46 | |
ba264b34 PP |
47 | #include <asm/io.h> |
48 | #include <asm/mach-au1x00/au1000.h> | |
49 | #include <asm/mach-au1x00/au1xxx_dbdma.h> | |
50 | #include <asm/mach-au1x00/au1100_mmc.h> | |
ba264b34 PP |
51 | |
52 | #include <au1xxx.h> | |
53 | #include "au1xmmc.h" | |
54 | ||
55 | #define DRIVER_NAME "au1xxx-mmc" | |
56 | ||
57 | /* Set this to enable special debugging macros */ | |
c4223c2c | 58 | /* #define DEBUG */ |
ba264b34 | 59 | |
c6563178 RK |
60 | #ifdef DEBUG |
61 | #define DBG(fmt, idx, args...) printk("au1xx(%d): DEBUG: " fmt, idx, ##args) | |
ba264b34 | 62 | #else |
c6563178 | 63 | #define DBG(fmt, idx, args...) |
ba264b34 PP |
64 | #endif |
65 | ||
ba264b34 PP |
66 | static inline void IRQ_ON(struct au1xmmc_host *host, u32 mask) |
67 | { | |
68 | u32 val = au_readl(HOST_CONFIG(host)); | |
69 | val |= mask; | |
70 | au_writel(val, HOST_CONFIG(host)); | |
71 | au_sync(); | |
72 | } | |
73 | ||
74 | static inline void FLUSH_FIFO(struct au1xmmc_host *host) | |
75 | { | |
76 | u32 val = au_readl(HOST_CONFIG2(host)); | |
77 | ||
78 | au_writel(val | SD_CONFIG2_FF, HOST_CONFIG2(host)); | |
79 | au_sync_delay(1); | |
80 | ||
81 | /* SEND_STOP will turn off clock control - this re-enables it */ | |
82 | val &= ~SD_CONFIG2_DF; | |
83 | ||
84 | au_writel(val, HOST_CONFIG2(host)); | |
85 | au_sync(); | |
86 | } | |
87 | ||
88 | static inline void IRQ_OFF(struct au1xmmc_host *host, u32 mask) | |
89 | { | |
90 | u32 val = au_readl(HOST_CONFIG(host)); | |
91 | val &= ~mask; | |
92 | au_writel(val, HOST_CONFIG(host)); | |
93 | au_sync(); | |
94 | } | |
95 | ||
96 | static inline void SEND_STOP(struct au1xmmc_host *host) | |
97 | { | |
281dd23e | 98 | u32 config2; |
ba264b34 PP |
99 | |
100 | WARN_ON(host->status != HOST_S_DATA); | |
101 | host->status = HOST_S_STOP; | |
102 | ||
281dd23e ML |
103 | config2 = au_readl(HOST_CONFIG2(host)); |
104 | au_writel(config2 | SD_CONFIG2_DF, HOST_CONFIG2(host)); | |
ba264b34 PP |
105 | au_sync(); |
106 | ||
107 | /* Send the stop commmand */ | |
108 | au_writel(STOP_CMD, HOST_CMD(host)); | |
109 | } | |
110 | ||
111 | static void au1xmmc_set_power(struct au1xmmc_host *host, int state) | |
112 | { | |
c4223c2c ML |
113 | if (host->platdata && host->platdata->set_power) |
114 | host->platdata->set_power(host->mmc, state); | |
ba264b34 PP |
115 | } |
116 | ||
c4223c2c | 117 | static int au1xmmc_card_inserted(struct au1xmmc_host *host) |
ba264b34 | 118 | { |
c4223c2c ML |
119 | int ret; |
120 | ||
121 | if (host->platdata && host->platdata->card_inserted) | |
122 | ret = host->platdata->card_inserted(host->mmc); | |
123 | else | |
124 | ret = 1; /* assume there is a card */ | |
125 | ||
126 | return ret; | |
ba264b34 PP |
127 | } |
128 | ||
82999770 | 129 | static int au1xmmc_card_readonly(struct mmc_host *mmc) |
ba264b34 | 130 | { |
82999770 | 131 | struct au1xmmc_host *host = mmc_priv(mmc); |
c4223c2c ML |
132 | int ret; |
133 | ||
134 | if (host->platdata && host->platdata->card_readonly) | |
135 | ret = host->platdata->card_readonly(mmc); | |
136 | else | |
137 | ret = 0; /* assume card is read-write */ | |
138 | ||
139 | return ret; | |
ba264b34 PP |
140 | } |
141 | ||
142 | static void au1xmmc_finish_request(struct au1xmmc_host *host) | |
143 | { | |
144 | ||
145 | struct mmc_request *mrq = host->mrq; | |
146 | ||
147 | host->mrq = NULL; | |
c4223c2c | 148 | host->flags &= HOST_F_ACTIVE | HOST_F_DMA; |
ba264b34 PP |
149 | |
150 | host->dma.len = 0; | |
151 | host->dma.dir = 0; | |
152 | ||
153 | host->pio.index = 0; | |
154 | host->pio.offset = 0; | |
155 | host->pio.len = 0; | |
156 | ||
157 | host->status = HOST_S_IDLE; | |
158 | ||
ba264b34 PP |
159 | mmc_request_done(host->mmc, mrq); |
160 | } | |
161 | ||
162 | static void au1xmmc_tasklet_finish(unsigned long param) | |
163 | { | |
164 | struct au1xmmc_host *host = (struct au1xmmc_host *) param; | |
165 | au1xmmc_finish_request(host); | |
166 | } | |
167 | ||
168 | static int au1xmmc_send_command(struct au1xmmc_host *host, int wait, | |
be0192aa | 169 | struct mmc_command *cmd, struct mmc_data *data) |
ba264b34 | 170 | { |
ba264b34 PP |
171 | u32 mmccmd = (cmd->opcode << SD_CMD_CI_SHIFT); |
172 | ||
e142c24c | 173 | switch (mmc_resp_type(cmd)) { |
279bc445 ML |
174 | case MMC_RSP_NONE: |
175 | break; | |
ba264b34 PP |
176 | case MMC_RSP_R1: |
177 | mmccmd |= SD_CMD_RT_1; | |
178 | break; | |
179 | case MMC_RSP_R1B: | |
180 | mmccmd |= SD_CMD_RT_1B; | |
181 | break; | |
182 | case MMC_RSP_R2: | |
183 | mmccmd |= SD_CMD_RT_2; | |
184 | break; | |
185 | case MMC_RSP_R3: | |
186 | mmccmd |= SD_CMD_RT_3; | |
187 | break; | |
279bc445 ML |
188 | default: |
189 | printk(KERN_INFO "au1xmmc: unhandled response type %02x\n", | |
190 | mmc_resp_type(cmd)); | |
17b0429d | 191 | return -EINVAL; |
ba264b34 PP |
192 | } |
193 | ||
be0192aa | 194 | if (data) { |
6356a9d9 | 195 | if (data->flags & MMC_DATA_READ) { |
be0192aa PO |
196 | if (data->blocks > 1) |
197 | mmccmd |= SD_CMD_CT_4; | |
198 | else | |
199 | mmccmd |= SD_CMD_CT_2; | |
6356a9d9 | 200 | } else if (data->flags & MMC_DATA_WRITE) { |
be0192aa PO |
201 | if (data->blocks > 1) |
202 | mmccmd |= SD_CMD_CT_3; | |
203 | else | |
204 | mmccmd |= SD_CMD_CT_1; | |
205 | } | |
ba264b34 PP |
206 | } |
207 | ||
208 | au_writel(cmd->arg, HOST_CMDARG(host)); | |
209 | au_sync(); | |
210 | ||
211 | if (wait) | |
212 | IRQ_OFF(host, SD_CONFIG_CR); | |
213 | ||
214 | au_writel((mmccmd | SD_CMD_GO), HOST_CMD(host)); | |
215 | au_sync(); | |
216 | ||
217 | /* Wait for the command to go on the line */ | |
218 | ||
219 | while(1) { | |
220 | if (!(au_readl(HOST_CMD(host)) & SD_CMD_GO)) | |
221 | break; | |
222 | } | |
223 | ||
224 | /* Wait for the command to come back */ | |
225 | ||
226 | if (wait) { | |
227 | u32 status = au_readl(HOST_STATUS(host)); | |
228 | ||
229 | while(!(status & SD_STATUS_CR)) | |
230 | status = au_readl(HOST_STATUS(host)); | |
231 | ||
232 | /* Clear the CR status */ | |
233 | au_writel(SD_STATUS_CR, HOST_STATUS(host)); | |
234 | ||
235 | IRQ_ON(host, SD_CONFIG_CR); | |
236 | } | |
237 | ||
17b0429d | 238 | return 0; |
ba264b34 PP |
239 | } |
240 | ||
241 | static void au1xmmc_data_complete(struct au1xmmc_host *host, u32 status) | |
242 | { | |
243 | ||
244 | struct mmc_request *mrq = host->mrq; | |
245 | struct mmc_data *data; | |
246 | u32 crc; | |
247 | ||
248 | WARN_ON(host->status != HOST_S_DATA && host->status != HOST_S_STOP); | |
249 | ||
250 | if (host->mrq == NULL) | |
251 | return; | |
252 | ||
253 | data = mrq->cmd->data; | |
254 | ||
255 | if (status == 0) | |
256 | status = au_readl(HOST_STATUS(host)); | |
257 | ||
258 | /* The transaction is really over when the SD_STATUS_DB bit is clear */ | |
259 | ||
260 | while((host->flags & HOST_F_XMIT) && (status & SD_STATUS_DB)) | |
261 | status = au_readl(HOST_STATUS(host)); | |
262 | ||
17b0429d | 263 | data->error = 0; |
ba264b34 PP |
264 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, host->dma.dir); |
265 | ||
266 | /* Process any errors */ | |
267 | ||
268 | crc = (status & (SD_STATUS_WC | SD_STATUS_RC)); | |
269 | if (host->flags & HOST_F_XMIT) | |
270 | crc |= ((status & 0x07) == 0x02) ? 0 : 1; | |
271 | ||
272 | if (crc) | |
17b0429d | 273 | data->error = -EILSEQ; |
ba264b34 PP |
274 | |
275 | /* Clear the CRC bits */ | |
276 | au_writel(SD_STATUS_WC | SD_STATUS_RC, HOST_STATUS(host)); | |
277 | ||
278 | data->bytes_xfered = 0; | |
279 | ||
17b0429d | 280 | if (!data->error) { |
ba264b34 | 281 | if (host->flags & HOST_F_DMA) { |
c4223c2c | 282 | #ifdef CONFIG_SOC_AU1200 /* DBDMA */ |
ba264b34 PP |
283 | u32 chan = DMA_CHANNEL(host); |
284 | ||
285 | chan_tab_t *c = *((chan_tab_t **) chan); | |
286 | au1x_dma_chan_t *cp = c->chan_ptr; | |
287 | data->bytes_xfered = cp->ddma_bytecnt; | |
c4223c2c | 288 | #endif |
ba264b34 PP |
289 | } |
290 | else | |
291 | data->bytes_xfered = | |
2c171bf1 | 292 | (data->blocks * data->blksz) - |
ba264b34 PP |
293 | host->pio.len; |
294 | } | |
295 | ||
296 | au1xmmc_finish_request(host); | |
297 | } | |
298 | ||
299 | static void au1xmmc_tasklet_data(unsigned long param) | |
300 | { | |
301 | struct au1xmmc_host *host = (struct au1xmmc_host *) param; | |
302 | ||
303 | u32 status = au_readl(HOST_STATUS(host)); | |
304 | au1xmmc_data_complete(host, status); | |
305 | } | |
306 | ||
307 | #define AU1XMMC_MAX_TRANSFER 8 | |
308 | ||
309 | static void au1xmmc_send_pio(struct au1xmmc_host *host) | |
310 | { | |
311 | ||
312 | struct mmc_data *data = 0; | |
313 | int sg_len, max, count = 0; | |
314 | unsigned char *sg_ptr; | |
315 | u32 status = 0; | |
316 | struct scatterlist *sg; | |
317 | ||
318 | data = host->mrq->data; | |
319 | ||
320 | if (!(host->flags & HOST_F_XMIT)) | |
321 | return; | |
322 | ||
323 | /* This is the pointer to the data buffer */ | |
324 | sg = &data->sg[host->pio.index]; | |
45711f1a | 325 | sg_ptr = sg_virt(sg) + host->pio.offset; |
ba264b34 PP |
326 | |
327 | /* This is the space left inside the buffer */ | |
328 | sg_len = data->sg[host->pio.index].length - host->pio.offset; | |
329 | ||
330 | /* Check to if we need less then the size of the sg_buffer */ | |
331 | ||
332 | max = (sg_len > host->pio.len) ? host->pio.len : sg_len; | |
333 | if (max > AU1XMMC_MAX_TRANSFER) max = AU1XMMC_MAX_TRANSFER; | |
334 | ||
335 | for(count = 0; count < max; count++ ) { | |
336 | unsigned char val; | |
337 | ||
338 | status = au_readl(HOST_STATUS(host)); | |
339 | ||
340 | if (!(status & SD_STATUS_TH)) | |
341 | break; | |
342 | ||
343 | val = *sg_ptr++; | |
344 | ||
345 | au_writel((unsigned long) val, HOST_TXPORT(host)); | |
346 | au_sync(); | |
347 | } | |
348 | ||
349 | host->pio.len -= count; | |
350 | host->pio.offset += count; | |
351 | ||
352 | if (count == sg_len) { | |
353 | host->pio.index++; | |
354 | host->pio.offset = 0; | |
355 | } | |
356 | ||
357 | if (host->pio.len == 0) { | |
358 | IRQ_OFF(host, SD_CONFIG_TH); | |
359 | ||
360 | if (host->flags & HOST_F_STOP) | |
361 | SEND_STOP(host); | |
362 | ||
363 | tasklet_schedule(&host->data_task); | |
364 | } | |
365 | } | |
366 | ||
367 | static void au1xmmc_receive_pio(struct au1xmmc_host *host) | |
368 | { | |
369 | ||
370 | struct mmc_data *data = 0; | |
371 | int sg_len = 0, max = 0, count = 0; | |
372 | unsigned char *sg_ptr = 0; | |
373 | u32 status = 0; | |
374 | struct scatterlist *sg; | |
375 | ||
376 | data = host->mrq->data; | |
377 | ||
378 | if (!(host->flags & HOST_F_RECV)) | |
379 | return; | |
380 | ||
381 | max = host->pio.len; | |
382 | ||
383 | if (host->pio.index < host->dma.len) { | |
384 | sg = &data->sg[host->pio.index]; | |
45711f1a | 385 | sg_ptr = sg_virt(sg) + host->pio.offset; |
ba264b34 PP |
386 | |
387 | /* This is the space left inside the buffer */ | |
388 | sg_len = sg_dma_len(&data->sg[host->pio.index]) - host->pio.offset; | |
389 | ||
390 | /* Check to if we need less then the size of the sg_buffer */ | |
391 | if (sg_len < max) max = sg_len; | |
392 | } | |
393 | ||
394 | if (max > AU1XMMC_MAX_TRANSFER) | |
395 | max = AU1XMMC_MAX_TRANSFER; | |
396 | ||
397 | for(count = 0; count < max; count++ ) { | |
398 | u32 val; | |
399 | status = au_readl(HOST_STATUS(host)); | |
400 | ||
401 | if (!(status & SD_STATUS_NE)) | |
402 | break; | |
403 | ||
404 | if (status & SD_STATUS_RC) { | |
c4223c2c | 405 | DBG("RX CRC Error [%d + %d].\n", host->pdev->id, |
ba264b34 PP |
406 | host->pio.len, count); |
407 | break; | |
408 | } | |
409 | ||
410 | if (status & SD_STATUS_RO) { | |
c4223c2c | 411 | DBG("RX Overrun [%d + %d]\n", host->pdev->id, |
ba264b34 PP |
412 | host->pio.len, count); |
413 | break; | |
414 | } | |
415 | else if (status & SD_STATUS_RU) { | |
c4223c2c | 416 | DBG("RX Underrun [%d + %d]\n", host->pdev->id, |
ba264b34 PP |
417 | host->pio.len, count); |
418 | break; | |
419 | } | |
420 | ||
421 | val = au_readl(HOST_RXPORT(host)); | |
422 | ||
423 | if (sg_ptr) | |
424 | *sg_ptr++ = (unsigned char) (val & 0xFF); | |
425 | } | |
426 | ||
427 | host->pio.len -= count; | |
428 | host->pio.offset += count; | |
429 | ||
430 | if (sg_len && count == sg_len) { | |
431 | host->pio.index++; | |
432 | host->pio.offset = 0; | |
433 | } | |
434 | ||
435 | if (host->pio.len == 0) { | |
436 | //IRQ_OFF(host, SD_CONFIG_RA | SD_CONFIG_RF); | |
437 | IRQ_OFF(host, SD_CONFIG_NE); | |
438 | ||
439 | if (host->flags & HOST_F_STOP) | |
440 | SEND_STOP(host); | |
441 | ||
442 | tasklet_schedule(&host->data_task); | |
443 | } | |
444 | } | |
445 | ||
446 | /* static void au1xmmc_cmd_complete | |
447 | This is called when a command has been completed - grab the response | |
448 | and check for errors. Then start the data transfer if it is indicated. | |
449 | */ | |
450 | ||
451 | static void au1xmmc_cmd_complete(struct au1xmmc_host *host, u32 status) | |
452 | { | |
453 | ||
454 | struct mmc_request *mrq = host->mrq; | |
455 | struct mmc_command *cmd; | |
456 | int trans; | |
457 | ||
458 | if (!host->mrq) | |
459 | return; | |
460 | ||
461 | cmd = mrq->cmd; | |
17b0429d | 462 | cmd->error = 0; |
ba264b34 | 463 | |
e9225176 RK |
464 | if (cmd->flags & MMC_RSP_PRESENT) { |
465 | if (cmd->flags & MMC_RSP_136) { | |
466 | u32 r[4]; | |
467 | int i; | |
468 | ||
469 | r[0] = au_readl(host->iobase + SD_RESP3); | |
470 | r[1] = au_readl(host->iobase + SD_RESP2); | |
471 | r[2] = au_readl(host->iobase + SD_RESP1); | |
472 | r[3] = au_readl(host->iobase + SD_RESP0); | |
473 | ||
474 | /* The CRC is omitted from the response, so really | |
475 | * we only got 120 bytes, but the engine expects | |
476 | * 128 bits, so we have to shift things up | |
477 | */ | |
478 | ||
479 | for(i = 0; i < 4; i++) { | |
480 | cmd->resp[i] = (r[i] & 0x00FFFFFF) << 8; | |
481 | if (i != 3) | |
482 | cmd->resp[i] |= (r[i + 1] & 0xFF000000) >> 24; | |
483 | } | |
484 | } else { | |
485 | /* Techincally, we should be getting all 48 bits of | |
486 | * the response (SD_RESP1 + SD_RESP2), but because | |
487 | * our response omits the CRC, our data ends up | |
488 | * being shifted 8 bits to the right. In this case, | |
489 | * that means that the OSR data starts at bit 31, | |
490 | * so we can just read RESP0 and return that | |
491 | */ | |
492 | cmd->resp[0] = au_readl(host->iobase + SD_RESP0); | |
ba264b34 PP |
493 | } |
494 | } | |
495 | ||
496 | /* Figure out errors */ | |
497 | ||
498 | if (status & (SD_STATUS_SC | SD_STATUS_WC | SD_STATUS_RC)) | |
17b0429d | 499 | cmd->error = -EILSEQ; |
ba264b34 PP |
500 | |
501 | trans = host->flags & (HOST_F_XMIT | HOST_F_RECV); | |
502 | ||
17b0429d | 503 | if (!trans || cmd->error) { |
ba264b34 PP |
504 | |
505 | IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA|SD_CONFIG_RF); | |
506 | tasklet_schedule(&host->finish_task); | |
507 | return; | |
508 | } | |
509 | ||
510 | host->status = HOST_S_DATA; | |
511 | ||
512 | if (host->flags & HOST_F_DMA) { | |
c4223c2c | 513 | #ifdef CONFIG_SOC_AU1200 /* DBDMA */ |
ba264b34 PP |
514 | u32 channel = DMA_CHANNEL(host); |
515 | ||
516 | /* Start the DMA as soon as the buffer gets something in it */ | |
517 | ||
518 | if (host->flags & HOST_F_RECV) { | |
519 | u32 mask = SD_STATUS_DB | SD_STATUS_NE; | |
520 | ||
521 | while((status & mask) != mask) | |
522 | status = au_readl(HOST_STATUS(host)); | |
523 | } | |
524 | ||
525 | au1xxx_dbdma_start(channel); | |
c4223c2c | 526 | #endif |
ba264b34 PP |
527 | } |
528 | } | |
529 | ||
530 | static void au1xmmc_set_clock(struct au1xmmc_host *host, int rate) | |
531 | { | |
532 | ||
533 | unsigned int pbus = get_au1x00_speed(); | |
534 | unsigned int divisor; | |
535 | u32 config; | |
536 | ||
537 | /* From databook: | |
538 | divisor = ((((cpuclock / sbus_divisor) / 2) / mmcclock) / 2) - 1 | |
539 | */ | |
540 | ||
541 | pbus /= ((au_readl(SYS_POWERCTRL) & 0x3) + 2); | |
542 | pbus /= 2; | |
543 | ||
544 | divisor = ((pbus / rate) / 2) - 1; | |
545 | ||
546 | config = au_readl(HOST_CONFIG(host)); | |
547 | ||
548 | config &= ~(SD_CONFIG_DIV); | |
549 | config |= (divisor & SD_CONFIG_DIV) | SD_CONFIG_DE; | |
550 | ||
551 | au_writel(config, HOST_CONFIG(host)); | |
552 | au_sync(); | |
553 | } | |
554 | ||
555 | static int | |
556 | au1xmmc_prepare_data(struct au1xmmc_host *host, struct mmc_data *data) | |
557 | { | |
2c171bf1 | 558 | int datalen = data->blocks * data->blksz; |
ba264b34 | 559 | |
ba264b34 PP |
560 | if (data->flags & MMC_DATA_READ) |
561 | host->flags |= HOST_F_RECV; | |
562 | else | |
563 | host->flags |= HOST_F_XMIT; | |
564 | ||
565 | if (host->mrq->stop) | |
566 | host->flags |= HOST_F_STOP; | |
567 | ||
568 | host->dma.dir = DMA_BIDIRECTIONAL; | |
569 | ||
570 | host->dma.len = dma_map_sg(mmc_dev(host->mmc), data->sg, | |
571 | data->sg_len, host->dma.dir); | |
572 | ||
573 | if (host->dma.len == 0) | |
17b0429d | 574 | return -ETIMEDOUT; |
ba264b34 | 575 | |
2c171bf1 | 576 | au_writel(data->blksz - 1, HOST_BLKSIZE(host)); |
ba264b34 PP |
577 | |
578 | if (host->flags & HOST_F_DMA) { | |
c4223c2c | 579 | #ifdef CONFIG_SOC_AU1200 /* DBDMA */ |
ba264b34 PP |
580 | int i; |
581 | u32 channel = DMA_CHANNEL(host); | |
582 | ||
583 | au1xxx_dbdma_stop(channel); | |
584 | ||
585 | for(i = 0; i < host->dma.len; i++) { | |
586 | u32 ret = 0, flags = DDMA_FLAGS_NOIE; | |
587 | struct scatterlist *sg = &data->sg[i]; | |
588 | int sg_len = sg->length; | |
589 | ||
590 | int len = (datalen > sg_len) ? sg_len : datalen; | |
591 | ||
592 | if (i == host->dma.len - 1) | |
593 | flags = DDMA_FLAGS_IE; | |
594 | ||
595 | if (host->flags & HOST_F_XMIT){ | |
596 | ret = au1xxx_dbdma_put_source_flags(channel, | |
45711f1a | 597 | (void *) sg_virt(sg), len, flags); |
ba264b34 PP |
598 | } |
599 | else { | |
600 | ret = au1xxx_dbdma_put_dest_flags(channel, | |
45711f1a | 601 | (void *) sg_virt(sg), |
ba264b34 PP |
602 | len, flags); |
603 | } | |
604 | ||
c4223c2c | 605 | if (!ret) |
ba264b34 PP |
606 | goto dataerr; |
607 | ||
608 | datalen -= len; | |
609 | } | |
c4223c2c | 610 | #endif |
ba264b34 PP |
611 | } |
612 | else { | |
613 | host->pio.index = 0; | |
614 | host->pio.offset = 0; | |
615 | host->pio.len = datalen; | |
616 | ||
617 | if (host->flags & HOST_F_XMIT) | |
618 | IRQ_ON(host, SD_CONFIG_TH); | |
619 | else | |
620 | IRQ_ON(host, SD_CONFIG_NE); | |
621 | //IRQ_ON(host, SD_CONFIG_RA|SD_CONFIG_RF); | |
622 | } | |
623 | ||
17b0429d | 624 | return 0; |
ba264b34 | 625 | |
c4223c2c ML |
626 | dataerr: |
627 | dma_unmap_sg(mmc_dev(host->mmc), data->sg, data->sg_len, | |
628 | host->dma.dir); | |
17b0429d | 629 | return -ETIMEDOUT; |
ba264b34 PP |
630 | } |
631 | ||
632 | /* static void au1xmmc_request | |
633 | This actually starts a command or data transaction | |
634 | */ | |
635 | ||
636 | static void au1xmmc_request(struct mmc_host* mmc, struct mmc_request* mrq) | |
637 | { | |
638 | ||
639 | struct au1xmmc_host *host = mmc_priv(mmc); | |
c0f3b6c7 | 640 | unsigned int flags = 0; |
17b0429d | 641 | int ret = 0; |
ba264b34 PP |
642 | |
643 | WARN_ON(irqs_disabled()); | |
644 | WARN_ON(host->status != HOST_S_IDLE); | |
645 | ||
646 | host->mrq = mrq; | |
647 | host->status = HOST_S_CMD; | |
648 | ||
ba264b34 PP |
649 | if (mrq->data) { |
650 | FLUSH_FIFO(host); | |
c0f3b6c7 | 651 | flags = mrq->data->flags; |
ba264b34 PP |
652 | ret = au1xmmc_prepare_data(host, mrq->data); |
653 | } | |
654 | ||
17b0429d | 655 | if (!ret) |
be0192aa | 656 | ret = au1xmmc_send_command(host, 0, mrq->cmd, mrq->data); |
ba264b34 | 657 | |
17b0429d | 658 | if (ret) { |
ba264b34 PP |
659 | mrq->cmd->error = ret; |
660 | au1xmmc_finish_request(host); | |
661 | } | |
662 | } | |
663 | ||
664 | static void au1xmmc_reset_controller(struct au1xmmc_host *host) | |
665 | { | |
666 | ||
667 | /* Apply the clock */ | |
668 | au_writel(SD_ENABLE_CE, HOST_ENABLE(host)); | |
669 | au_sync_delay(1); | |
670 | ||
671 | au_writel(SD_ENABLE_R | SD_ENABLE_CE, HOST_ENABLE(host)); | |
672 | au_sync_delay(5); | |
673 | ||
674 | au_writel(~0, HOST_STATUS(host)); | |
675 | au_sync(); | |
676 | ||
677 | au_writel(0, HOST_BLKSIZE(host)); | |
678 | au_writel(0x001fffff, HOST_TIMEOUT(host)); | |
679 | au_sync(); | |
680 | ||
681 | au_writel(SD_CONFIG2_EN, HOST_CONFIG2(host)); | |
682 | au_sync(); | |
683 | ||
684 | au_writel(SD_CONFIG2_EN | SD_CONFIG2_FF, HOST_CONFIG2(host)); | |
685 | au_sync_delay(1); | |
686 | ||
687 | au_writel(SD_CONFIG2_EN, HOST_CONFIG2(host)); | |
688 | au_sync(); | |
689 | ||
690 | /* Configure interrupts */ | |
691 | au_writel(AU1XMMC_INTERRUPTS, HOST_CONFIG(host)); | |
692 | au_sync(); | |
693 | } | |
694 | ||
695 | ||
696 | static void au1xmmc_set_ios(struct mmc_host* mmc, struct mmc_ios* ios) | |
697 | { | |
698 | struct au1xmmc_host *host = mmc_priv(mmc); | |
281dd23e | 699 | u32 config2; |
ba264b34 | 700 | |
ba264b34 PP |
701 | if (ios->power_mode == MMC_POWER_OFF) |
702 | au1xmmc_set_power(host, 0); | |
703 | else if (ios->power_mode == MMC_POWER_ON) { | |
704 | au1xmmc_set_power(host, 1); | |
705 | } | |
706 | ||
707 | if (ios->clock && ios->clock != host->clock) { | |
708 | au1xmmc_set_clock(host, ios->clock); | |
709 | host->clock = ios->clock; | |
710 | } | |
281dd23e ML |
711 | |
712 | config2 = au_readl(HOST_CONFIG2(host)); | |
713 | switch (ios->bus_width) { | |
714 | case MMC_BUS_WIDTH_4: | |
715 | config2 |= SD_CONFIG2_WB; | |
716 | break; | |
717 | case MMC_BUS_WIDTH_1: | |
718 | config2 &= ~SD_CONFIG2_WB; | |
719 | break; | |
720 | } | |
721 | au_writel(config2, HOST_CONFIG2(host)); | |
722 | au_sync(); | |
ba264b34 PP |
723 | } |
724 | ||
ba264b34 PP |
725 | #define STATUS_TIMEOUT (SD_STATUS_RAT | SD_STATUS_DT) |
726 | #define STATUS_DATA_IN (SD_STATUS_NE) | |
727 | #define STATUS_DATA_OUT (SD_STATUS_TH) | |
728 | ||
7d12e780 | 729 | static irqreturn_t au1xmmc_irq(int irq, void *dev_id) |
ba264b34 | 730 | { |
c4223c2c | 731 | struct au1xmmc_host *host = dev_id; |
ba264b34 | 732 | u32 status; |
ba264b34 | 733 | |
c4223c2c | 734 | status = au_readl(HOST_STATUS(host)); |
ba264b34 | 735 | |
c4223c2c ML |
736 | if (!(status & SD_STATUS_I)) |
737 | return IRQ_NONE; /* not ours */ | |
ba264b34 | 738 | |
20f522ff ML |
739 | if (status & SD_STATUS_SI) /* SDIO */ |
740 | mmc_signal_sdio_irq(host->mmc); | |
741 | ||
c4223c2c ML |
742 | if (host->mrq && (status & STATUS_TIMEOUT)) { |
743 | if (status & SD_STATUS_RAT) | |
744 | host->mrq->cmd->error = -ETIMEDOUT; | |
745 | else if (status & SD_STATUS_DT) | |
746 | host->mrq->data->error = -ETIMEDOUT; | |
ba264b34 | 747 | |
c4223c2c ML |
748 | /* In PIO mode, interrupts might still be enabled */ |
749 | IRQ_OFF(host, SD_CONFIG_NE | SD_CONFIG_TH); | |
ba264b34 | 750 | |
c4223c2c ML |
751 | /* IRQ_OFF(host, SD_CONFIG_TH | SD_CONFIG_RA | SD_CONFIG_RF); */ |
752 | tasklet_schedule(&host->finish_task); | |
753 | } | |
ba264b34 | 754 | #if 0 |
c4223c2c ML |
755 | else if (status & SD_STATUS_DD) { |
756 | /* Sometimes we get a DD before a NE in PIO mode */ | |
757 | if (!(host->flags & HOST_F_DMA) && (status & SD_STATUS_NE)) | |
758 | au1xmmc_receive_pio(host); | |
759 | else { | |
760 | au1xmmc_data_complete(host, status); | |
761 | /* tasklet_schedule(&host->data_task); */ | |
ba264b34 | 762 | } |
ba264b34 | 763 | } |
c4223c2c ML |
764 | #endif |
765 | else if (status & SD_STATUS_CR) { | |
766 | if (host->status == HOST_S_CMD) | |
767 | au1xmmc_cmd_complete(host, status); | |
768 | ||
769 | } else if (!(host->flags & HOST_F_DMA)) { | |
770 | if ((host->flags & HOST_F_XMIT) && (status & STATUS_DATA_OUT)) | |
771 | au1xmmc_send_pio(host); | |
772 | else if ((host->flags & HOST_F_RECV) && (status & STATUS_DATA_IN)) | |
773 | au1xmmc_receive_pio(host); | |
774 | ||
775 | } else if (status & 0x203F3C70) { | |
776 | DBG("Unhandled status %8.8x\n", host->pdev->id, | |
777 | status); | |
ba264b34 PP |
778 | } |
779 | ||
c4223c2c ML |
780 | au_writel(status, HOST_STATUS(host)); |
781 | au_sync(); | |
ba264b34 | 782 | |
c4223c2c | 783 | return IRQ_HANDLED; |
ba264b34 PP |
784 | } |
785 | ||
c4223c2c ML |
786 | #ifdef CONFIG_SOC_AU1200 |
787 | /* 8bit memory DMA device */ | |
788 | static dbdev_tab_t au1xmmc_mem_dbdev = { | |
789 | .dev_id = DSCR_CMD0_ALWAYS, | |
790 | .dev_flags = DEV_FLAGS_ANYUSE, | |
791 | .dev_tsize = 0, | |
792 | .dev_devwidth = 8, | |
793 | .dev_physaddr = 0x00000000, | |
794 | .dev_intlevel = 0, | |
795 | .dev_intpolarity = 0, | |
ba264b34 | 796 | }; |
c4223c2c | 797 | static int memid; |
ba264b34 | 798 | |
c4223c2c | 799 | static void au1xmmc_dbdma_callback(int irq, void *dev_id) |
ba264b34 | 800 | { |
c4223c2c | 801 | struct au1xmmc_host *host = (struct au1xmmc_host *)dev_id; |
ba264b34 | 802 | |
c4223c2c ML |
803 | /* Avoid spurious interrupts */ |
804 | if (!host->mrq) | |
805 | return; | |
ba264b34 | 806 | |
c4223c2c ML |
807 | if (host->flags & HOST_F_STOP) |
808 | SEND_STOP(host); | |
ba264b34 | 809 | |
c4223c2c ML |
810 | tasklet_schedule(&host->data_task); |
811 | } | |
ba264b34 | 812 | |
c4223c2c ML |
813 | static int au1xmmc_dbdma_init(struct au1xmmc_host *host) |
814 | { | |
815 | struct resource *res; | |
816 | int txid, rxid; | |
817 | ||
818 | res = platform_get_resource(host->pdev, IORESOURCE_DMA, 0); | |
819 | if (!res) | |
820 | return -ENODEV; | |
821 | txid = res->start; | |
822 | ||
823 | res = platform_get_resource(host->pdev, IORESOURCE_DMA, 1); | |
824 | if (!res) | |
825 | return -ENODEV; | |
826 | rxid = res->start; | |
827 | ||
828 | if (!memid) | |
829 | return -ENODEV; | |
830 | ||
831 | host->tx_chan = au1xxx_dbdma_chan_alloc(memid, txid, | |
832 | au1xmmc_dbdma_callback, (void *)host); | |
833 | if (!host->tx_chan) { | |
834 | dev_err(&host->pdev->dev, "cannot allocate TX DMA\n"); | |
835 | return -ENODEV; | |
836 | } | |
837 | ||
838 | host->rx_chan = au1xxx_dbdma_chan_alloc(rxid, memid, | |
839 | au1xmmc_dbdma_callback, (void *)host); | |
840 | if (!host->rx_chan) { | |
841 | dev_err(&host->pdev->dev, "cannot allocate RX DMA\n"); | |
842 | au1xxx_dbdma_chan_free(host->tx_chan); | |
843 | return -ENODEV; | |
844 | } | |
ba264b34 | 845 | |
c4223c2c ML |
846 | au1xxx_dbdma_set_devwidth(host->tx_chan, 8); |
847 | au1xxx_dbdma_set_devwidth(host->rx_chan, 8); | |
ba264b34 | 848 | |
c4223c2c ML |
849 | au1xxx_dbdma_ring_alloc(host->tx_chan, AU1XMMC_DESCRIPTOR_COUNT); |
850 | au1xxx_dbdma_ring_alloc(host->rx_chan, AU1XMMC_DESCRIPTOR_COUNT); | |
ba264b34 | 851 | |
c4223c2c ML |
852 | /* DBDMA is good to go */ |
853 | host->flags |= HOST_F_DMA; | |
ba264b34 | 854 | |
c4223c2c ML |
855 | return 0; |
856 | } | |
ba264b34 | 857 | |
c4223c2c ML |
858 | static void au1xmmc_dbdma_shutdown(struct au1xmmc_host *host) |
859 | { | |
860 | if (host->flags & HOST_F_DMA) { | |
861 | host->flags &= ~HOST_F_DMA; | |
862 | au1xxx_dbdma_chan_free(host->tx_chan); | |
863 | au1xxx_dbdma_chan_free(host->rx_chan); | |
864 | } | |
ba264b34 | 865 | } |
c4223c2c | 866 | #endif |
ba264b34 | 867 | |
20f522ff ML |
868 | static void au1xmmc_enable_sdio_irq(struct mmc_host *mmc, int en) |
869 | { | |
870 | struct au1xmmc_host *host = mmc_priv(mmc); | |
871 | ||
872 | if (en) | |
873 | IRQ_ON(host, SD_CONFIG_SI); | |
874 | else | |
875 | IRQ_OFF(host, SD_CONFIG_SI); | |
876 | } | |
877 | ||
bf8c80a6 | 878 | static const struct mmc_host_ops au1xmmc_ops = { |
ba264b34 PP |
879 | .request = au1xmmc_request, |
880 | .set_ios = au1xmmc_set_ios, | |
82999770 | 881 | .get_ro = au1xmmc_card_readonly, |
20f522ff | 882 | .enable_sdio_irq = au1xmmc_enable_sdio_irq, |
ba264b34 PP |
883 | }; |
884 | ||
c4223c2c | 885 | static void au1xmmc_poll_event(unsigned long arg) |
ba264b34 | 886 | { |
c4223c2c ML |
887 | struct au1xmmc_host *host = (struct au1xmmc_host *)arg; |
888 | int card = au1xmmc_card_inserted(host); | |
889 | int controller = (host->flags & HOST_F_ACTIVE) ? 1 : 0; | |
890 | ||
891 | if (card != controller) { | |
892 | host->flags &= ~HOST_F_ACTIVE; | |
893 | if (card) | |
894 | host->flags |= HOST_F_ACTIVE; | |
895 | mmc_detect_change(host->mmc, 0); | |
896 | } | |
ba264b34 | 897 | |
c4223c2c ML |
898 | #ifdef DEBUG |
899 | if (host->mrq != NULL) { | |
900 | u32 status = au_readl(HOST_STATUS(host)); | |
901 | DBG("PENDING - %8.8x\n", host->pdev->id, status); | |
902 | } | |
903 | #endif | |
904 | mod_timer(&host->timer, jiffies + AU1XMMC_DETECT_TIMEOUT); | |
905 | } | |
ba264b34 | 906 | |
c4223c2c ML |
907 | static void au1xmmc_init_cd_poll_timer(struct au1xmmc_host *host) |
908 | { | |
909 | init_timer(&host->timer); | |
910 | host->timer.function = au1xmmc_poll_event; | |
911 | host->timer.data = (unsigned long)host; | |
912 | host->timer.expires = jiffies + AU1XMMC_DETECT_TIMEOUT; | |
913 | } | |
ba264b34 | 914 | |
c4223c2c ML |
915 | static int __devinit au1xmmc_probe(struct platform_device *pdev) |
916 | { | |
917 | struct mmc_host *mmc; | |
918 | struct au1xmmc_host *host; | |
919 | struct resource *r; | |
920 | int ret; | |
921 | ||
922 | mmc = mmc_alloc_host(sizeof(struct au1xmmc_host), &pdev->dev); | |
923 | if (!mmc) { | |
924 | dev_err(&pdev->dev, "no memory for mmc_host\n"); | |
925 | ret = -ENOMEM; | |
926 | goto out0; | |
ba264b34 PP |
927 | } |
928 | ||
c4223c2c ML |
929 | host = mmc_priv(mmc); |
930 | host->mmc = mmc; | |
931 | host->platdata = pdev->dev.platform_data; | |
932 | host->pdev = pdev; | |
ba264b34 | 933 | |
c4223c2c ML |
934 | ret = -ENODEV; |
935 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
936 | if (!r) { | |
937 | dev_err(&pdev->dev, "no mmio defined\n"); | |
938 | goto out1; | |
939 | } | |
ba264b34 | 940 | |
c4223c2c ML |
941 | host->ioarea = request_mem_region(r->start, r->end - r->start + 1, |
942 | pdev->name); | |
943 | if (!host->ioarea) { | |
944 | dev_err(&pdev->dev, "mmio already in use\n"); | |
945 | goto out1; | |
946 | } | |
ba264b34 | 947 | |
c4223c2c ML |
948 | host->iobase = (unsigned long)ioremap(r->start, 0x3c); |
949 | if (!host->iobase) { | |
950 | dev_err(&pdev->dev, "cannot remap mmio\n"); | |
951 | goto out2; | |
952 | } | |
953 | ||
954 | r = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
955 | if (!r) { | |
956 | dev_err(&pdev->dev, "no IRQ defined\n"); | |
957 | goto out3; | |
958 | } | |
ba264b34 | 959 | |
c4223c2c ML |
960 | host->irq = r->start; |
961 | /* IRQ is shared among both SD controllers */ | |
962 | ret = request_irq(host->irq, au1xmmc_irq, IRQF_SHARED, | |
963 | DRIVER_NAME, host); | |
964 | if (ret) { | |
965 | dev_err(&pdev->dev, "cannot grab IRQ\n"); | |
966 | goto out3; | |
967 | } | |
ba264b34 | 968 | |
c4223c2c | 969 | mmc->ops = &au1xmmc_ops; |
ba264b34 | 970 | |
c4223c2c ML |
971 | mmc->f_min = 450000; |
972 | mmc->f_max = 24000000; | |
fe4a3c7a | 973 | |
c4223c2c ML |
974 | mmc->max_seg_size = AU1XMMC_DESCRIPTOR_SIZE; |
975 | mmc->max_phys_segs = AU1XMMC_DESCRIPTOR_COUNT; | |
ba264b34 | 976 | |
c4223c2c ML |
977 | mmc->max_blk_size = 2048; |
978 | mmc->max_blk_count = 512; | |
ba264b34 | 979 | |
c4223c2c | 980 | mmc->ocr_avail = AU1XMMC_OCR; |
20f522ff | 981 | mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; |
ba264b34 | 982 | |
c4223c2c | 983 | host->status = HOST_S_IDLE; |
ba264b34 | 984 | |
c4223c2c ML |
985 | /* board-specific carddetect setup, if any */ |
986 | if (host->platdata && host->platdata->cd_setup) { | |
987 | ret = host->platdata->cd_setup(mmc, 1); | |
988 | if (ret) { | |
989 | dev_err(&pdev->dev, "board CD setup failed\n"); | |
990 | goto out4; | |
991 | } | |
992 | } else { | |
993 | /* poll the board-specific is-card-in-socket-? method */ | |
994 | au1xmmc_init_cd_poll_timer(host); | |
995 | } | |
ba264b34 | 996 | |
c4223c2c ML |
997 | tasklet_init(&host->data_task, au1xmmc_tasklet_data, |
998 | (unsigned long)host); | |
ba264b34 | 999 | |
c4223c2c ML |
1000 | tasklet_init(&host->finish_task, au1xmmc_tasklet_finish, |
1001 | (unsigned long)host); | |
ba264b34 | 1002 | |
c4223c2c ML |
1003 | #ifdef CONFIG_SOC_AU1200 |
1004 | ret = au1xmmc_dbdma_init(host); | |
1005 | if (ret) | |
1006 | printk(KERN_INFO DRIVER_NAME ": DBDMA init failed; using PIO\n"); | |
1007 | #endif | |
ba264b34 | 1008 | |
c4223c2c ML |
1009 | #ifdef CONFIG_LEDS_CLASS |
1010 | if (host->platdata && host->platdata->led) { | |
1011 | struct led_classdev *led = host->platdata->led; | |
1012 | led->name = mmc_hostname(mmc); | |
1013 | led->brightness = LED_OFF; | |
1014 | led->default_trigger = mmc_hostname(mmc); | |
1015 | ret = led_classdev_register(mmc_dev(mmc), led); | |
1016 | if (ret) | |
1017 | goto out5; | |
1018 | } | |
1019 | #endif | |
ba264b34 | 1020 | |
c4223c2c | 1021 | au1xmmc_reset_controller(host); |
ba264b34 | 1022 | |
c4223c2c ML |
1023 | ret = mmc_add_host(mmc); |
1024 | if (ret) { | |
1025 | dev_err(&pdev->dev, "cannot add mmc host\n"); | |
1026 | goto out6; | |
1027 | } | |
ba264b34 | 1028 | |
c4223c2c | 1029 | platform_set_drvdata(pdev, mmc); |
ba264b34 | 1030 | |
c4223c2c ML |
1031 | /* start the carddetect poll timer if necessary */ |
1032 | if (!(host->platdata && host->platdata->cd_setup)) | |
ba264b34 PP |
1033 | add_timer(&host->timer); |
1034 | ||
c4223c2c ML |
1035 | printk(KERN_INFO DRIVER_NAME ": MMC Controller %d set up at %8.8X" |
1036 | " (mode=%s)\n", pdev->id, host->iobase, | |
1037 | host->flags & HOST_F_DMA ? "dma" : "pio"); | |
ba264b34 | 1038 | |
c4223c2c | 1039 | return 0; /* all ok */ |
ba264b34 | 1040 | |
c4223c2c ML |
1041 | out6: |
1042 | #ifdef CONFIG_LEDS_CLASS | |
1043 | if (host->platdata && host->platdata->led) | |
1044 | led_classdev_unregister(host->platdata->led); | |
1045 | out5: | |
1046 | #endif | |
1047 | au_writel(0, HOST_ENABLE(host)); | |
1048 | au_writel(0, HOST_CONFIG(host)); | |
1049 | au_writel(0, HOST_CONFIG2(host)); | |
1050 | au_sync(); | |
1051 | ||
1052 | #ifdef CONFIG_SOC_AU1200 | |
1053 | au1xmmc_dbdma_shutdown(host); | |
1054 | #endif | |
1055 | ||
1056 | tasklet_kill(&host->data_task); | |
1057 | tasklet_kill(&host->finish_task); | |
1058 | ||
1059 | if (host->platdata && host->platdata->cd_setup) | |
1060 | host->platdata->cd_setup(mmc, 0); | |
1061 | out4: | |
1062 | free_irq(host->irq, host); | |
1063 | out3: | |
1064 | iounmap((void *)host->iobase); | |
1065 | out2: | |
1066 | release_resource(host->ioarea); | |
1067 | kfree(host->ioarea); | |
1068 | out1: | |
1069 | mmc_free_host(mmc); | |
1070 | out0: | |
1071 | return ret; | |
ba264b34 PP |
1072 | } |
1073 | ||
b256f9df | 1074 | static int __devexit au1xmmc_remove(struct platform_device *pdev) |
ba264b34 | 1075 | { |
c4223c2c ML |
1076 | struct mmc_host *mmc = platform_get_drvdata(pdev); |
1077 | struct au1xmmc_host *host; | |
1078 | ||
1079 | if (mmc) { | |
1080 | host = mmc_priv(mmc); | |
1081 | ||
1082 | mmc_remove_host(mmc); | |
ba264b34 | 1083 | |
c4223c2c ML |
1084 | #ifdef CONFIG_LEDS_CLASS |
1085 | if (host->platdata && host->platdata->led) | |
1086 | led_classdev_unregister(host->platdata->led); | |
1087 | #endif | |
ba264b34 | 1088 | |
c4223c2c ML |
1089 | if (host->platdata && host->platdata->cd_setup) |
1090 | host->platdata->cd_setup(mmc, 0); | |
1091 | else | |
1092 | del_timer_sync(&host->timer); | |
ba264b34 | 1093 | |
c4223c2c ML |
1094 | au_writel(0, HOST_ENABLE(host)); |
1095 | au_writel(0, HOST_CONFIG(host)); | |
1096 | au_writel(0, HOST_CONFIG2(host)); | |
1097 | au_sync(); | |
ba264b34 PP |
1098 | |
1099 | tasklet_kill(&host->data_task); | |
1100 | tasklet_kill(&host->finish_task); | |
1101 | ||
c4223c2c ML |
1102 | #ifdef CONFIG_SOC_AU1200 |
1103 | au1xmmc_dbdma_shutdown(host); | |
1104 | #endif | |
ba264b34 PP |
1105 | au1xmmc_set_power(host, 0); |
1106 | ||
c4223c2c ML |
1107 | free_irq(host->irq, host); |
1108 | iounmap((void *)host->iobase); | |
1109 | release_resource(host->ioarea); | |
1110 | kfree(host->ioarea); | |
ba264b34 | 1111 | |
c4223c2c | 1112 | mmc_free_host(mmc); |
ba264b34 | 1113 | } |
ba264b34 PP |
1114 | return 0; |
1115 | } | |
1116 | ||
b256f9df | 1117 | static struct platform_driver au1xmmc_driver = { |
ba264b34 PP |
1118 | .probe = au1xmmc_probe, |
1119 | .remove = au1xmmc_remove, | |
1120 | .suspend = NULL, | |
b256f9df MM |
1121 | .resume = NULL, |
1122 | .driver = { | |
1123 | .name = DRIVER_NAME, | |
bc65c724 | 1124 | .owner = THIS_MODULE, |
b256f9df | 1125 | }, |
ba264b34 PP |
1126 | }; |
1127 | ||
1128 | static int __init au1xmmc_init(void) | |
1129 | { | |
c4223c2c ML |
1130 | #ifdef CONFIG_SOC_AU1200 |
1131 | /* DSCR_CMD0_ALWAYS has a stride of 32 bits, we need a stride | |
1132 | * of 8 bits. And since devices are shared, we need to create | |
1133 | * our own to avoid freaking out other devices. | |
1134 | */ | |
1135 | memid = au1xxx_ddma_add_device(&au1xmmc_mem_dbdev); | |
1136 | if (!memid) | |
1137 | printk(KERN_ERR "au1xmmc: cannot add memory dbdma dev\n"); | |
1138 | #endif | |
b256f9df | 1139 | return platform_driver_register(&au1xmmc_driver); |
ba264b34 PP |
1140 | } |
1141 | ||
1142 | static void __exit au1xmmc_exit(void) | |
1143 | { | |
c4223c2c ML |
1144 | #ifdef CONFIG_SOC_AU1200 |
1145 | if (memid) | |
1146 | au1xxx_ddma_del_device(memid); | |
1147 | #endif | |
b256f9df | 1148 | platform_driver_unregister(&au1xmmc_driver); |
ba264b34 PP |
1149 | } |
1150 | ||
1151 | module_init(au1xmmc_init); | |
1152 | module_exit(au1xmmc_exit); | |
1153 | ||
ba264b34 PP |
1154 | MODULE_AUTHOR("Advanced Micro Devices, Inc"); |
1155 | MODULE_DESCRIPTION("MMC/SD driver for the Alchemy Au1XXX"); | |
1156 | MODULE_LICENSE("GPL"); | |
bc65c724 | 1157 | MODULE_ALIAS("platform:au1xxx-mmc"); |