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1 | /* |
2 | * Copyright 2008, Freescale Semiconductor, Inc | |
3 | * Andy Fleming | |
4 | * | |
5 | * Based vaguely on the Linux code | |
6 | * | |
7 | * See file CREDITS for list of people who contributed to this | |
8 | * project. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License as | |
12 | * published by the Free Software Foundation; either version 2 of | |
13 | * the License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
23 | * MA 02111-1307 USA | |
24 | */ | |
25 | ||
26 | #include <config.h> | |
27 | #include <common.h> | |
28 | #include <command.h> | |
29 | #include <mmc.h> | |
30 | #include <part.h> | |
31 | #include <malloc.h> | |
32 | #include <linux/list.h> | |
33 | #include <mmc.h> | |
34 | ||
35 | static struct list_head mmc_devices; | |
36 | static int cur_dev_num = -1; | |
37 | ||
38 | int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) | |
39 | { | |
40 | return mmc->send_cmd(mmc, cmd, data); | |
41 | } | |
42 | ||
43 | int mmc_set_blocklen(struct mmc *mmc, int len) | |
44 | { | |
45 | struct mmc_cmd cmd; | |
46 | ||
47 | cmd.cmdidx = MMC_CMD_SET_BLOCKLEN; | |
48 | cmd.resp_type = MMC_RSP_R1; | |
49 | cmd.cmdarg = len; | |
50 | cmd.flags = 0; | |
51 | ||
52 | return mmc_send_cmd(mmc, &cmd, NULL); | |
53 | } | |
54 | ||
55 | struct mmc *find_mmc_device(int dev_num) | |
56 | { | |
57 | struct mmc *m; | |
58 | struct list_head *entry; | |
59 | ||
60 | list_for_each(entry, &mmc_devices) { | |
61 | m = list_entry(entry, struct mmc, link); | |
62 | ||
63 | if (m->block_dev.dev == dev_num) | |
64 | return m; | |
65 | } | |
66 | ||
67 | printf("MMC Device %d not found\n", dev_num); | |
68 | ||
69 | return NULL; | |
70 | } | |
71 | ||
72 | static ulong | |
73 | mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src) | |
74 | { | |
75 | struct mmc_cmd cmd; | |
76 | struct mmc_data data; | |
77 | int err; | |
78 | int stoperr = 0; | |
79 | struct mmc *mmc = find_mmc_device(dev_num); | |
80 | int blklen; | |
81 | ||
82 | if (!mmc) | |
83 | return -1; | |
84 | ||
85 | blklen = mmc->write_bl_len; | |
86 | ||
87 | err = mmc_set_blocklen(mmc, mmc->write_bl_len); | |
88 | ||
89 | if (err) { | |
90 | printf("set write bl len failed\n\r"); | |
91 | return err; | |
92 | } | |
93 | ||
94 | if (blkcnt > 1) | |
95 | cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK; | |
96 | else | |
97 | cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK; | |
98 | ||
99 | if (mmc->high_capacity) | |
100 | cmd.cmdarg = start; | |
101 | else | |
102 | cmd.cmdarg = start * blklen; | |
103 | ||
104 | cmd.resp_type = MMC_RSP_R1; | |
105 | cmd.flags = 0; | |
106 | ||
107 | data.src = src; | |
108 | data.blocks = blkcnt; | |
109 | data.blocksize = blklen; | |
110 | data.flags = MMC_DATA_WRITE; | |
111 | ||
112 | err = mmc_send_cmd(mmc, &cmd, &data); | |
113 | ||
114 | if (err) { | |
115 | printf("mmc write failed\n\r"); | |
116 | return err; | |
117 | } | |
118 | ||
119 | if (blkcnt > 1) { | |
120 | cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION; | |
121 | cmd.cmdarg = 0; | |
122 | cmd.resp_type = MMC_RSP_R1b; | |
123 | cmd.flags = 0; | |
124 | stoperr = mmc_send_cmd(mmc, &cmd, NULL); | |
125 | } | |
126 | ||
127 | return blkcnt; | |
128 | } | |
129 | ||
130 | int mmc_read_block(struct mmc *mmc, void *dst, uint blocknum) | |
131 | { | |
132 | struct mmc_cmd cmd; | |
133 | struct mmc_data data; | |
134 | ||
135 | cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK; | |
136 | ||
137 | if (mmc->high_capacity) | |
138 | cmd.cmdarg = blocknum; | |
139 | else | |
140 | cmd.cmdarg = blocknum * mmc->read_bl_len; | |
141 | ||
142 | cmd.resp_type = MMC_RSP_R1; | |
143 | cmd.flags = 0; | |
144 | ||
145 | data.dest = dst; | |
146 | data.blocks = 1; | |
147 | data.blocksize = mmc->read_bl_len; | |
148 | data.flags = MMC_DATA_READ; | |
149 | ||
150 | return mmc_send_cmd(mmc, &cmd, &data); | |
151 | } | |
152 | ||
153 | int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size) | |
154 | { | |
155 | char *buffer; | |
156 | int i; | |
157 | int blklen = mmc->read_bl_len; | |
158 | int startblock = src / blklen; | |
159 | int endblock = (src + size - 1) / blklen; | |
160 | int err = 0; | |
161 | ||
162 | /* Make a buffer big enough to hold all the blocks we might read */ | |
163 | buffer = malloc(blklen); | |
164 | ||
165 | if (!buffer) { | |
166 | printf("Could not allocate buffer for MMC read!\n"); | |
167 | return -1; | |
168 | } | |
169 | ||
170 | /* We always do full block reads from the card */ | |
171 | err = mmc_set_blocklen(mmc, mmc->read_bl_len); | |
172 | ||
173 | if (err) | |
174 | return err; | |
175 | ||
176 | for (i = startblock; i <= endblock; i++) { | |
177 | int segment_size; | |
178 | int offset; | |
179 | ||
180 | err = mmc_read_block(mmc, buffer, i); | |
181 | ||
182 | if (err) | |
183 | goto free_buffer; | |
184 | ||
185 | /* | |
186 | * The first block may not be aligned, so we | |
187 | * copy from the desired point in the block | |
188 | */ | |
189 | offset = (src & (blklen - 1)); | |
190 | segment_size = MIN(blklen - offset, size); | |
191 | ||
192 | memcpy(dst, buffer + offset, segment_size); | |
193 | ||
194 | dst += segment_size; | |
195 | src += segment_size; | |
196 | size -= segment_size; | |
197 | } | |
198 | ||
199 | free_buffer: | |
200 | free(buffer); | |
201 | ||
202 | return err; | |
203 | } | |
204 | ||
205 | static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst) | |
206 | { | |
207 | int err; | |
208 | int i; | |
209 | struct mmc *mmc = find_mmc_device(dev_num); | |
210 | ||
211 | if (!mmc) | |
212 | return 0; | |
213 | ||
214 | /* We always do full block reads from the card */ | |
215 | err = mmc_set_blocklen(mmc, mmc->read_bl_len); | |
216 | ||
217 | if (err) { | |
218 | return 0; | |
219 | } | |
220 | ||
221 | for (i = start; i < start + blkcnt; i++, dst += mmc->read_bl_len) { | |
222 | err = mmc_read_block(mmc, dst, i); | |
223 | ||
224 | if (err) { | |
225 | printf("block read failed: %d\n", err); | |
226 | return i - start; | |
227 | } | |
228 | } | |
229 | ||
230 | return blkcnt; | |
231 | } | |
232 | ||
233 | int mmc_go_idle(struct mmc* mmc) | |
234 | { | |
235 | struct mmc_cmd cmd; | |
236 | int err; | |
237 | ||
238 | udelay(1000); | |
239 | ||
240 | cmd.cmdidx = MMC_CMD_GO_IDLE_STATE; | |
241 | cmd.cmdarg = 0; | |
242 | cmd.resp_type = MMC_RSP_NONE; | |
243 | cmd.flags = 0; | |
244 | ||
245 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
246 | ||
247 | if (err) | |
248 | return err; | |
249 | ||
250 | udelay(2000); | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | int | |
256 | sd_send_op_cond(struct mmc *mmc) | |
257 | { | |
258 | int timeout = 1000; | |
259 | int err; | |
260 | struct mmc_cmd cmd; | |
261 | ||
262 | do { | |
263 | cmd.cmdidx = MMC_CMD_APP_CMD; | |
264 | cmd.resp_type = MMC_RSP_R1; | |
265 | cmd.cmdarg = 0; | |
266 | cmd.flags = 0; | |
267 | ||
268 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
269 | ||
270 | if (err) | |
271 | return err; | |
272 | ||
273 | cmd.cmdidx = SD_CMD_APP_SEND_OP_COND; | |
274 | cmd.resp_type = MMC_RSP_R3; | |
275 | cmd.cmdarg = mmc->voltages; | |
276 | ||
277 | if (mmc->version == SD_VERSION_2) | |
278 | cmd.cmdarg |= OCR_HCS; | |
279 | ||
280 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
281 | ||
282 | if (err) | |
283 | return err; | |
284 | ||
285 | udelay(1000); | |
286 | } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--); | |
287 | ||
288 | if (timeout <= 0) | |
289 | return UNUSABLE_ERR; | |
290 | ||
291 | if (mmc->version != SD_VERSION_2) | |
292 | mmc->version = SD_VERSION_1_0; | |
293 | ||
294 | mmc->ocr = ((uint *)(cmd.response))[0]; | |
295 | ||
296 | mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS); | |
297 | mmc->rca = 0; | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | int mmc_send_op_cond(struct mmc *mmc) | |
303 | { | |
304 | int timeout = 1000; | |
305 | struct mmc_cmd cmd; | |
306 | int err; | |
307 | ||
308 | /* Some cards seem to need this */ | |
309 | mmc_go_idle(mmc); | |
310 | ||
311 | do { | |
312 | cmd.cmdidx = MMC_CMD_SEND_OP_COND; | |
313 | cmd.resp_type = MMC_RSP_R3; | |
314 | cmd.cmdarg = OCR_HCS | mmc->voltages; | |
315 | cmd.flags = 0; | |
316 | ||
317 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
318 | ||
319 | if (err) | |
320 | return err; | |
321 | ||
322 | udelay(1000); | |
323 | } while (!(cmd.response[0] & OCR_BUSY) && timeout--); | |
324 | ||
325 | if (timeout <= 0) | |
326 | return UNUSABLE_ERR; | |
327 | ||
328 | mmc->version = MMC_VERSION_UNKNOWN; | |
329 | mmc->ocr = ((uint *)(cmd.response))[0]; | |
330 | ||
331 | mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS); | |
332 | mmc->rca = 0; | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
337 | ||
338 | int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd) | |
339 | { | |
340 | struct mmc_cmd cmd; | |
341 | struct mmc_data data; | |
342 | int err; | |
343 | ||
344 | /* Get the Card Status Register */ | |
345 | cmd.cmdidx = MMC_CMD_SEND_EXT_CSD; | |
346 | cmd.resp_type = MMC_RSP_R1; | |
347 | cmd.cmdarg = 0; | |
348 | cmd.flags = 0; | |
349 | ||
350 | data.dest = ext_csd; | |
351 | data.blocks = 1; | |
352 | data.blocksize = 512; | |
353 | data.flags = MMC_DATA_READ; | |
354 | ||
355 | err = mmc_send_cmd(mmc, &cmd, &data); | |
356 | ||
357 | return err; | |
358 | } | |
359 | ||
360 | ||
361 | int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value) | |
362 | { | |
363 | struct mmc_cmd cmd; | |
364 | ||
365 | cmd.cmdidx = MMC_CMD_SWITCH; | |
366 | cmd.resp_type = MMC_RSP_R1b; | |
367 | cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | | |
368 | (index << 16) | | |
369 | (value << 8); | |
370 | cmd.flags = 0; | |
371 | ||
372 | return mmc_send_cmd(mmc, &cmd, NULL); | |
373 | } | |
374 | ||
375 | int mmc_change_freq(struct mmc *mmc) | |
376 | { | |
377 | char ext_csd[512]; | |
378 | char cardtype; | |
379 | int err; | |
380 | ||
381 | mmc->card_caps = 0; | |
382 | ||
383 | /* Only version 4 supports high-speed */ | |
384 | if (mmc->version < MMC_VERSION_4) | |
385 | return 0; | |
386 | ||
387 | mmc->card_caps |= MMC_MODE_4BIT; | |
388 | ||
389 | err = mmc_send_ext_csd(mmc, ext_csd); | |
390 | ||
391 | if (err) | |
392 | return err; | |
393 | ||
394 | if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215]) | |
395 | mmc->high_capacity = 1; | |
396 | ||
397 | cardtype = ext_csd[196] & 0xf; | |
398 | ||
399 | err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1); | |
400 | ||
401 | if (err) | |
402 | return err; | |
403 | ||
404 | /* Now check to see that it worked */ | |
405 | err = mmc_send_ext_csd(mmc, ext_csd); | |
406 | ||
407 | if (err) | |
408 | return err; | |
409 | ||
410 | /* No high-speed support */ | |
411 | if (!ext_csd[185]) | |
412 | return 0; | |
413 | ||
414 | /* High Speed is set, there are two types: 52MHz and 26MHz */ | |
415 | if (cardtype & MMC_HS_52MHZ) | |
416 | mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS; | |
417 | else | |
418 | mmc->card_caps |= MMC_MODE_HS; | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp) | |
424 | { | |
425 | struct mmc_cmd cmd; | |
426 | struct mmc_data data; | |
427 | ||
428 | /* Switch the frequency */ | |
429 | cmd.cmdidx = SD_CMD_SWITCH_FUNC; | |
430 | cmd.resp_type = MMC_RSP_R1; | |
431 | cmd.cmdarg = (mode << 31) | 0xffffff; | |
432 | cmd.cmdarg &= ~(0xf << (group * 4)); | |
433 | cmd.cmdarg |= value << (group * 4); | |
434 | cmd.flags = 0; | |
435 | ||
436 | data.dest = (char *)resp; | |
437 | data.blocksize = 64; | |
438 | data.blocks = 1; | |
439 | data.flags = MMC_DATA_READ; | |
440 | ||
441 | return mmc_send_cmd(mmc, &cmd, &data); | |
442 | } | |
443 | ||
444 | ||
445 | int sd_change_freq(struct mmc *mmc) | |
446 | { | |
447 | int err; | |
448 | struct mmc_cmd cmd; | |
449 | uint scr[2]; | |
450 | uint switch_status[16]; | |
451 | struct mmc_data data; | |
452 | int timeout; | |
453 | ||
454 | mmc->card_caps = 0; | |
455 | ||
456 | /* Read the SCR to find out if this card supports higher speeds */ | |
457 | cmd.cmdidx = MMC_CMD_APP_CMD; | |
458 | cmd.resp_type = MMC_RSP_R1; | |
459 | cmd.cmdarg = mmc->rca << 16; | |
460 | cmd.flags = 0; | |
461 | ||
462 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
463 | ||
464 | if (err) | |
465 | return err; | |
466 | ||
467 | cmd.cmdidx = SD_CMD_APP_SEND_SCR; | |
468 | cmd.resp_type = MMC_RSP_R1; | |
469 | cmd.cmdarg = 0; | |
470 | cmd.flags = 0; | |
471 | ||
472 | timeout = 3; | |
473 | ||
474 | retry_scr: | |
475 | data.dest = (char *)&scr; | |
476 | data.blocksize = 8; | |
477 | data.blocks = 1; | |
478 | data.flags = MMC_DATA_READ; | |
479 | ||
480 | err = mmc_send_cmd(mmc, &cmd, &data); | |
481 | ||
482 | if (err) { | |
483 | if (timeout--) | |
484 | goto retry_scr; | |
485 | ||
486 | return err; | |
487 | } | |
488 | ||
489 | mmc->scr[0] = scr[0]; | |
490 | mmc->scr[1] = scr[1]; | |
491 | ||
492 | switch ((mmc->scr[0] >> 24) & 0xf) { | |
493 | case 0: | |
494 | mmc->version = SD_VERSION_1_0; | |
495 | break; | |
496 | case 1: | |
497 | mmc->version = SD_VERSION_1_10; | |
498 | break; | |
499 | case 2: | |
500 | mmc->version = SD_VERSION_2; | |
501 | break; | |
502 | default: | |
503 | mmc->version = SD_VERSION_1_0; | |
504 | break; | |
505 | } | |
506 | ||
507 | /* Version 1.0 doesn't support switching */ | |
508 | if (mmc->version == SD_VERSION_1_0) | |
509 | return 0; | |
510 | ||
511 | timeout = 4; | |
512 | while (timeout--) { | |
513 | err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1, | |
514 | (u8 *)&switch_status); | |
515 | ||
516 | if (err) | |
517 | return err; | |
518 | ||
519 | /* The high-speed function is busy. Try again */ | |
520 | if (!switch_status[7] & SD_HIGHSPEED_BUSY) | |
521 | break; | |
522 | } | |
523 | ||
524 | if (mmc->scr[0] & SD_DATA_4BIT) | |
525 | mmc->card_caps |= MMC_MODE_4BIT; | |
526 | ||
527 | /* If high-speed isn't supported, we return */ | |
528 | if (!(switch_status[3] & SD_HIGHSPEED_SUPPORTED)) | |
529 | return 0; | |
530 | ||
531 | err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status); | |
532 | ||
533 | if (err) | |
534 | return err; | |
535 | ||
536 | if ((switch_status[4] & 0x0f000000) == 0x01000000) | |
537 | mmc->card_caps |= MMC_MODE_HS; | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
542 | /* frequency bases */ | |
543 | /* divided by 10 to be nice to platforms without floating point */ | |
544 | int fbase[] = { | |
545 | 10000, | |
546 | 100000, | |
547 | 1000000, | |
548 | 10000000, | |
549 | }; | |
550 | ||
551 | /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice | |
552 | * to platforms without floating point. | |
553 | */ | |
554 | int multipliers[] = { | |
555 | 0, /* reserved */ | |
556 | 10, | |
557 | 12, | |
558 | 13, | |
559 | 15, | |
560 | 20, | |
561 | 25, | |
562 | 30, | |
563 | 35, | |
564 | 40, | |
565 | 45, | |
566 | 50, | |
567 | 55, | |
568 | 60, | |
569 | 70, | |
570 | 80, | |
571 | }; | |
572 | ||
573 | void mmc_set_ios(struct mmc *mmc) | |
574 | { | |
575 | mmc->set_ios(mmc); | |
576 | } | |
577 | ||
578 | void mmc_set_clock(struct mmc *mmc, uint clock) | |
579 | { | |
580 | if (clock > mmc->f_max) | |
581 | clock = mmc->f_max; | |
582 | ||
583 | if (clock < mmc->f_min) | |
584 | clock = mmc->f_min; | |
585 | ||
586 | mmc->clock = clock; | |
587 | ||
588 | mmc_set_ios(mmc); | |
589 | } | |
590 | ||
591 | void mmc_set_bus_width(struct mmc *mmc, uint width) | |
592 | { | |
593 | mmc->bus_width = width; | |
594 | ||
595 | mmc_set_ios(mmc); | |
596 | } | |
597 | ||
598 | int mmc_startup(struct mmc *mmc) | |
599 | { | |
600 | int err; | |
601 | uint mult, freq; | |
602 | u64 cmult, csize; | |
603 | struct mmc_cmd cmd; | |
604 | ||
605 | /* Put the Card in Identify Mode */ | |
606 | cmd.cmdidx = MMC_CMD_ALL_SEND_CID; | |
607 | cmd.resp_type = MMC_RSP_R2; | |
608 | cmd.cmdarg = 0; | |
609 | cmd.flags = 0; | |
610 | ||
611 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
612 | ||
613 | if (err) | |
614 | return err; | |
615 | ||
616 | memcpy(mmc->cid, cmd.response, 16); | |
617 | ||
618 | /* | |
619 | * For MMC cards, set the Relative Address. | |
620 | * For SD cards, get the Relatvie Address. | |
621 | * This also puts the cards into Standby State | |
622 | */ | |
623 | cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR; | |
624 | cmd.cmdarg = mmc->rca << 16; | |
625 | cmd.resp_type = MMC_RSP_R6; | |
626 | cmd.flags = 0; | |
627 | ||
628 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
629 | ||
630 | if (err) | |
631 | return err; | |
632 | ||
633 | if (IS_SD(mmc)) | |
634 | mmc->rca = (((uint *)(cmd.response))[0] >> 16) & 0xffff; | |
635 | ||
636 | /* Get the Card-Specific Data */ | |
637 | cmd.cmdidx = MMC_CMD_SEND_CSD; | |
638 | cmd.resp_type = MMC_RSP_R2; | |
639 | cmd.cmdarg = mmc->rca << 16; | |
640 | cmd.flags = 0; | |
641 | ||
642 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
643 | ||
644 | if (err) | |
645 | return err; | |
646 | ||
647 | mmc->csd[0] = ((uint *)(cmd.response))[0]; | |
648 | mmc->csd[1] = ((uint *)(cmd.response))[1]; | |
649 | mmc->csd[2] = ((uint *)(cmd.response))[2]; | |
650 | mmc->csd[3] = ((uint *)(cmd.response))[3]; | |
651 | ||
652 | if (mmc->version == MMC_VERSION_UNKNOWN) { | |
653 | int version = (cmd.response[0] >> 2) & 0xf; | |
654 | ||
655 | switch (version) { | |
656 | case 0: | |
657 | mmc->version = MMC_VERSION_1_2; | |
658 | break; | |
659 | case 1: | |
660 | mmc->version = MMC_VERSION_1_4; | |
661 | break; | |
662 | case 2: | |
663 | mmc->version = MMC_VERSION_2_2; | |
664 | break; | |
665 | case 3: | |
666 | mmc->version = MMC_VERSION_3; | |
667 | break; | |
668 | case 4: | |
669 | mmc->version = MMC_VERSION_4; | |
670 | break; | |
671 | default: | |
672 | mmc->version = MMC_VERSION_1_2; | |
673 | break; | |
674 | } | |
675 | } | |
676 | ||
677 | /* divide frequency by 10, since the mults are 10x bigger */ | |
678 | freq = fbase[(cmd.response[3] & 0x7)]; | |
679 | mult = multipliers[((cmd.response[3] >> 3) & 0xf)]; | |
680 | ||
681 | mmc->tran_speed = freq * mult; | |
682 | ||
683 | mmc->read_bl_len = 1 << ((((uint *)(cmd.response))[1] >> 16) & 0xf); | |
684 | ||
685 | if (IS_SD(mmc)) | |
686 | mmc->write_bl_len = mmc->read_bl_len; | |
687 | else | |
688 | mmc->write_bl_len = 1 << ((((uint *)(cmd.response))[3] >> 22) & 0xf); | |
689 | ||
690 | if (mmc->high_capacity) { | |
691 | csize = (mmc->csd[1] & 0x3f) << 16 | |
692 | | (mmc->csd[2] & 0xffff0000) >> 16; | |
693 | cmult = 8; | |
694 | } else { | |
695 | csize = (mmc->csd[1] & 0x3ff) << 2 | |
696 | | (mmc->csd[2] & 0xc0000000) >> 30; | |
697 | cmult = (mmc->csd[2] & 0x00038000) >> 15; | |
698 | } | |
699 | ||
700 | mmc->capacity = (csize + 1) << (cmult + 2); | |
701 | mmc->capacity *= mmc->read_bl_len; | |
702 | ||
703 | if (mmc->read_bl_len > 512) | |
704 | mmc->read_bl_len = 512; | |
705 | ||
706 | if (mmc->write_bl_len > 512) | |
707 | mmc->write_bl_len = 512; | |
708 | ||
709 | /* Select the card, and put it into Transfer Mode */ | |
710 | cmd.cmdidx = MMC_CMD_SELECT_CARD; | |
711 | cmd.resp_type = MMC_RSP_R1b; | |
712 | cmd.cmdarg = mmc->rca << 16; | |
713 | cmd.flags = 0; | |
714 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
715 | ||
716 | if (err) | |
717 | return err; | |
718 | ||
719 | if (IS_SD(mmc)) | |
720 | err = sd_change_freq(mmc); | |
721 | else | |
722 | err = mmc_change_freq(mmc); | |
723 | ||
724 | if (err) | |
725 | return err; | |
726 | ||
727 | /* Restrict card's capabilities by what the host can do */ | |
728 | mmc->card_caps &= mmc->host_caps; | |
729 | ||
730 | if (IS_SD(mmc)) { | |
731 | if (mmc->card_caps & MMC_MODE_4BIT) { | |
732 | cmd.cmdidx = MMC_CMD_APP_CMD; | |
733 | cmd.resp_type = MMC_RSP_R1; | |
734 | cmd.cmdarg = mmc->rca << 16; | |
735 | cmd.flags = 0; | |
736 | ||
737 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
738 | if (err) | |
739 | return err; | |
740 | ||
741 | cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH; | |
742 | cmd.resp_type = MMC_RSP_R1; | |
743 | cmd.cmdarg = 2; | |
744 | cmd.flags = 0; | |
745 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
746 | if (err) | |
747 | return err; | |
748 | ||
749 | mmc_set_bus_width(mmc, 4); | |
750 | } | |
751 | ||
752 | if (mmc->card_caps & MMC_MODE_HS) | |
753 | mmc_set_clock(mmc, 50000000); | |
754 | else | |
755 | mmc_set_clock(mmc, 25000000); | |
756 | } else { | |
757 | if (mmc->card_caps & MMC_MODE_4BIT) { | |
758 | /* Set the card to use 4 bit*/ | |
759 | err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, | |
760 | EXT_CSD_BUS_WIDTH, | |
761 | EXT_CSD_BUS_WIDTH_4); | |
762 | ||
763 | if (err) | |
764 | return err; | |
765 | ||
766 | mmc_set_bus_width(mmc, 4); | |
767 | } else if (mmc->card_caps & MMC_MODE_8BIT) { | |
768 | /* Set the card to use 8 bit*/ | |
769 | err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, | |
770 | EXT_CSD_BUS_WIDTH, | |
771 | EXT_CSD_BUS_WIDTH_8); | |
772 | ||
773 | if (err) | |
774 | return err; | |
775 | ||
776 | mmc_set_bus_width(mmc, 8); | |
777 | } | |
778 | ||
779 | if (mmc->card_caps & MMC_MODE_HS) { | |
780 | if (mmc->card_caps & MMC_MODE_HS_52MHz) | |
781 | mmc_set_clock(mmc, 52000000); | |
782 | else | |
783 | mmc_set_clock(mmc, 26000000); | |
784 | } else | |
785 | mmc_set_clock(mmc, 20000000); | |
786 | } | |
787 | ||
788 | /* fill in device description */ | |
789 | mmc->block_dev.lun = 0; | |
790 | mmc->block_dev.type = 0; | |
791 | mmc->block_dev.blksz = mmc->read_bl_len; | |
792 | mmc->block_dev.lba = mmc->capacity/mmc->read_bl_len; | |
793 | sprintf(mmc->block_dev.vendor,"Man %02x%02x%02x Snr %02x%02x%02x%02x", | |
794 | mmc->cid[0], mmc->cid[1], mmc->cid[2], | |
795 | mmc->cid[9], mmc->cid[10], mmc->cid[11], mmc->cid[12]); | |
796 | sprintf(mmc->block_dev.product,"%c%c%c%c%c", mmc->cid[3], | |
797 | mmc->cid[4], mmc->cid[5], mmc->cid[6], mmc->cid[7]); | |
798 | sprintf(mmc->block_dev.revision,"%d.%d", mmc->cid[8] >> 4, | |
799 | mmc->cid[8] & 0xf); | |
800 | init_part(&mmc->block_dev); | |
801 | ||
802 | return 0; | |
803 | } | |
804 | ||
805 | int mmc_send_if_cond(struct mmc *mmc) | |
806 | { | |
807 | struct mmc_cmd cmd; | |
808 | int err; | |
809 | ||
810 | cmd.cmdidx = SD_CMD_SEND_IF_COND; | |
811 | /* We set the bit if the host supports voltages between 2.7 and 3.6 V */ | |
812 | cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa; | |
813 | cmd.resp_type = MMC_RSP_R7; | |
814 | cmd.flags = 0; | |
815 | ||
816 | err = mmc_send_cmd(mmc, &cmd, NULL); | |
817 | ||
818 | if (err) | |
819 | return err; | |
820 | ||
821 | if ((((uint *)(cmd.response))[0] & 0xff) != 0xaa) | |
822 | return UNUSABLE_ERR; | |
823 | else | |
824 | mmc->version = SD_VERSION_2; | |
825 | ||
826 | return 0; | |
827 | } | |
828 | ||
829 | int mmc_register(struct mmc *mmc) | |
830 | { | |
831 | /* Setup the universal parts of the block interface just once */ | |
832 | mmc->block_dev.if_type = IF_TYPE_MMC; | |
833 | mmc->block_dev.dev = cur_dev_num++; | |
834 | mmc->block_dev.removable = 1; | |
835 | mmc->block_dev.block_read = mmc_bread; | |
836 | mmc->block_dev.block_write = mmc_bwrite; | |
837 | ||
838 | INIT_LIST_HEAD (&mmc->link); | |
839 | ||
840 | list_add_tail (&mmc->link, &mmc_devices); | |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
845 | block_dev_desc_t *mmc_get_dev(int dev) | |
846 | { | |
847 | struct mmc *mmc = find_mmc_device(dev); | |
848 | ||
e85649c7 | 849 | return mmc ? &mmc->block_dev : NULL; |
272cc70b AF |
850 | } |
851 | ||
852 | int mmc_init(struct mmc *mmc) | |
853 | { | |
854 | int err; | |
855 | ||
856 | err = mmc->init(mmc); | |
857 | ||
858 | if (err) | |
859 | return err; | |
860 | ||
861 | /* Reset the Card */ | |
862 | err = mmc_go_idle(mmc); | |
863 | ||
864 | if (err) | |
865 | return err; | |
866 | ||
867 | /* Test for SD version 2 */ | |
868 | err = mmc_send_if_cond(mmc); | |
869 | ||
870 | /* If we got an error other than timeout, we bail */ | |
871 | if (err && err != TIMEOUT) | |
872 | return err; | |
873 | ||
874 | /* Now try to get the SD card's operating condition */ | |
875 | err = sd_send_op_cond(mmc); | |
876 | ||
877 | /* If the command timed out, we check for an MMC card */ | |
878 | if (err == TIMEOUT) { | |
879 | err = mmc_send_op_cond(mmc); | |
880 | ||
881 | if (err) { | |
882 | printf("Card did not respond to voltage select!\n"); | |
883 | return UNUSABLE_ERR; | |
884 | } | |
885 | } | |
886 | ||
887 | return mmc_startup(mmc); | |
888 | } | |
889 | ||
890 | /* | |
891 | * CPU and board-specific MMC initializations. Aliased function | |
892 | * signals caller to move on | |
893 | */ | |
894 | static int __def_mmc_init(bd_t *bis) | |
895 | { | |
896 | return -1; | |
897 | } | |
898 | ||
f9a109b3 PT |
899 | int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init"))); |
900 | int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init"))); | |
272cc70b AF |
901 | |
902 | void print_mmc_devices(char separator) | |
903 | { | |
904 | struct mmc *m; | |
905 | struct list_head *entry; | |
906 | ||
907 | list_for_each(entry, &mmc_devices) { | |
908 | m = list_entry(entry, struct mmc, link); | |
909 | ||
910 | printf("%s: %d", m->name, m->block_dev.dev); | |
911 | ||
912 | if (entry->next != &mmc_devices) | |
913 | printf("%c ", separator); | |
914 | } | |
915 | ||
916 | printf("\n"); | |
917 | } | |
918 | ||
919 | int mmc_initialize(bd_t *bis) | |
920 | { | |
921 | INIT_LIST_HEAD (&mmc_devices); | |
922 | cur_dev_num = 0; | |
923 | ||
924 | if (board_mmc_init(bis) < 0) | |
925 | cpu_mmc_init(bis); | |
926 | ||
927 | print_mmc_devices(','); | |
928 | ||
929 | return 0; | |
930 | } |