]> git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/mmc/mmc.c
projects / people / ms / u-boot.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
mmc: compile out erase and write mmc commands if write operations are not enabled
[people/ms/u-boot.git] / drivers / mmc / mmc.c
1 /*
2 * Copyright 2008, Freescale Semiconductor, Inc
3 * Andy Fleming
4 *
5 * Based vaguely on the Linux code
6 *
7 * SPDX-License-Identifier: GPL-2.0+
8 */
9
10 #include <config.h>
11 #include <common.h>
12 #include <command.h>
13 #include <dm.h>
14 #include <dm/device-internal.h>
15 #include <errno.h>
16 #include <mmc.h>
17 #include <part.h>
18 #include <power/regulator.h>
19 #include <malloc.h>
20 #include <memalign.h>
21 #include <linux/list.h>
22 #include <div64.h>
23 #include "mmc_private.h"
24
25 static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage);
26 static int mmc_power_cycle(struct mmc *mmc);
27 static int mmc_select_mode_and_width(struct mmc *mmc, uint card_caps);
28
29 #if CONFIG_IS_ENABLED(MMC_TINY)
30 static struct mmc mmc_static;
31 struct mmc *find_mmc_device(int dev_num)
32 {
33 return &mmc_static;
34 }
35
36 void mmc_do_preinit(void)
37 {
38 struct mmc *m = &mmc_static;
39 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
40 mmc_set_preinit(m, 1);
41 #endif
42 if (m->preinit)
43 mmc_start_init(m);
44 }
45
46 struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
47 {
48 return &mmc->block_dev;
49 }
50 #endif
51
52 #if !CONFIG_IS_ENABLED(DM_MMC)
53
54 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
55 static int mmc_wait_dat0(struct mmc *mmc, int state, int timeout)
56 {
57 return -ENOSYS;
58 }
59 #endif
60
61 __weak int board_mmc_getwp(struct mmc *mmc)
62 {
63 return -1;
64 }
65
66 int mmc_getwp(struct mmc *mmc)
67 {
68 int wp;
69
70 wp = board_mmc_getwp(mmc);
71
72 if (wp < 0) {
73 if (mmc->cfg->ops->getwp)
74 wp = mmc->cfg->ops->getwp(mmc);
75 else
76 wp = 0;
77 }
78
79 return wp;
80 }
81
82 __weak int board_mmc_getcd(struct mmc *mmc)
83 {
84 return -1;
85 }
86 #endif
87
88 #ifdef CONFIG_MMC_TRACE
89 void mmmc_trace_before_send(struct mmc *mmc, struct mmc_cmd *cmd)
90 {
91 printf("CMD_SEND:%d\n", cmd->cmdidx);
92 printf("\t\tARG\t\t\t 0x%08X\n", cmd->cmdarg);
93 }
94
95 void mmmc_trace_after_send(struct mmc *mmc, struct mmc_cmd *cmd, int ret)
96 {
97 int i;
98 u8 *ptr;
99
100 if (ret) {
101 printf("\t\tRET\t\t\t %d\n", ret);
102 } else {
103 switch (cmd->resp_type) {
104 case MMC_RSP_NONE:
105 printf("\t\tMMC_RSP_NONE\n");
106 break;
107 case MMC_RSP_R1:
108 printf("\t\tMMC_RSP_R1,5,6,7 \t 0x%08X \n",
109 cmd->response[0]);
110 break;
111 case MMC_RSP_R1b:
112 printf("\t\tMMC_RSP_R1b\t\t 0x%08X \n",
113 cmd->response[0]);
114 break;
115 case MMC_RSP_R2:
116 printf("\t\tMMC_RSP_R2\t\t 0x%08X \n",
117 cmd->response[0]);
118 printf("\t\t \t\t 0x%08X \n",
119 cmd->response[1]);
120 printf("\t\t \t\t 0x%08X \n",
121 cmd->response[2]);
122 printf("\t\t \t\t 0x%08X \n",
123 cmd->response[3]);
124 printf("\n");
125 printf("\t\t\t\t\tDUMPING DATA\n");
126 for (i = 0; i < 4; i++) {
127 int j;
128 printf("\t\t\t\t\t%03d - ", i*4);
129 ptr = (u8 *)&cmd->response[i];
130 ptr += 3;
131 for (j = 0; j < 4; j++)
132 printf("%02X ", *ptr--);
133 printf("\n");
134 }
135 break;
136 case MMC_RSP_R3:
137 printf("\t\tMMC_RSP_R3,4\t\t 0x%08X \n",
138 cmd->response[0]);
139 break;
140 default:
141 printf("\t\tERROR MMC rsp not supported\n");
142 break;
143 }
144 }
145 }
146
147 void mmc_trace_state(struct mmc *mmc, struct mmc_cmd *cmd)
148 {
149 int status;
150
151 status = (cmd->response[0] & MMC_STATUS_CURR_STATE) >> 9;
152 printf("CURR STATE:%d\n", status);
153 }
154 #endif
155
156 #if CONFIG_IS_ENABLED(MMC_VERBOSE) || defined(DEBUG)
157 const char *mmc_mode_name(enum bus_mode mode)
158 {
159 static const char *const names[] = {
160 [MMC_LEGACY] = "MMC legacy",
161 [SD_LEGACY] = "SD Legacy",
162 [MMC_HS] = "MMC High Speed (26MHz)",
163 [SD_HS] = "SD High Speed (50MHz)",
164 [UHS_SDR12] = "UHS SDR12 (25MHz)",
165 [UHS_SDR25] = "UHS SDR25 (50MHz)",
166 [UHS_SDR50] = "UHS SDR50 (100MHz)",
167 [UHS_SDR104] = "UHS SDR104 (208MHz)",
168 [UHS_DDR50] = "UHS DDR50 (50MHz)",
169 [MMC_HS_52] = "MMC High Speed (52MHz)",
170 [MMC_DDR_52] = "MMC DDR52 (52MHz)",
171 [MMC_HS_200] = "HS200 (200MHz)",
172 };
173
174 if (mode >= MMC_MODES_END)
175 return "Unknown mode";
176 else
177 return names[mode];
178 }
179 #endif
180
181 static uint mmc_mode2freq(struct mmc *mmc, enum bus_mode mode)
182 {
183 static const int freqs[] = {
184 [SD_LEGACY] = 25000000,
185 [MMC_HS] = 26000000,
186 [SD_HS] = 50000000,
187 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
188 [UHS_SDR12] = 25000000,
189 [UHS_SDR25] = 50000000,
190 [UHS_SDR50] = 100000000,
191 [UHS_DDR50] = 50000000,
192 #ifdef MMC_SUPPORTS_TUNING
193 [UHS_SDR104] = 208000000,
194 #endif
195 #endif
196 [MMC_HS_52] = 52000000,
197 [MMC_DDR_52] = 52000000,
198 #if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
199 [MMC_HS_200] = 200000000,
200 #endif
201 };
202
203 if (mode == MMC_LEGACY)
204 return mmc->legacy_speed;
205 else if (mode >= MMC_MODES_END)
206 return 0;
207 else
208 return freqs[mode];
209 }
210
211 static int mmc_select_mode(struct mmc *mmc, enum bus_mode mode)
212 {
213 mmc->selected_mode = mode;
214 mmc->tran_speed = mmc_mode2freq(mmc, mode);
215 mmc->ddr_mode = mmc_is_mode_ddr(mode);
216 debug("selecting mode %s (freq : %d MHz)\n", mmc_mode_name(mode),
217 mmc->tran_speed / 1000000);
218 return 0;
219 }
220
221 #if !CONFIG_IS_ENABLED(DM_MMC)
222 int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
223 {
224 int ret;
225
226 mmmc_trace_before_send(mmc, cmd);
227 ret = mmc->cfg->ops->send_cmd(mmc, cmd, data);
228 mmmc_trace_after_send(mmc, cmd, ret);
229
230 return ret;
231 }
232 #endif
233
234 int mmc_send_status(struct mmc *mmc, int timeout)
235 {
236 struct mmc_cmd cmd;
237 int err, retries = 5;
238
239 cmd.cmdidx = MMC_CMD_SEND_STATUS;
240 cmd.resp_type = MMC_RSP_R1;
241 if (!mmc_host_is_spi(mmc))
242 cmd.cmdarg = mmc->rca << 16;
243
244 while (1) {
245 err = mmc_send_cmd(mmc, &cmd, NULL);
246 if (!err) {
247 if ((cmd.response[0] & MMC_STATUS_RDY_FOR_DATA) &&
248 (cmd.response[0] & MMC_STATUS_CURR_STATE) !=
249 MMC_STATE_PRG)
250 break;
251
252 if (cmd.response[0] & MMC_STATUS_MASK) {
253 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
254 pr_err("Status Error: 0x%08X\n",
255 cmd.response[0]);
256 #endif
257 return -ECOMM;
258 }
259 } else if (--retries < 0)
260 return err;
261
262 if (timeout-- <= 0)
263 break;
264
265 udelay(1000);
266 }
267
268 mmc_trace_state(mmc, &cmd);
269 if (timeout <= 0) {
270 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
271 pr_err("Timeout waiting card ready\n");
272 #endif
273 return -ETIMEDOUT;
274 }
275
276 return 0;
277 }
278
279 int mmc_set_blocklen(struct mmc *mmc, int len)
280 {
281 struct mmc_cmd cmd;
282 int err;
283
284 if (mmc->ddr_mode)
285 return 0;
286
287 cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
288 cmd.resp_type = MMC_RSP_R1;
289 cmd.cmdarg = len;
290
291 err = mmc_send_cmd(mmc, &cmd, NULL);
292
293 #ifdef CONFIG_MMC_QUIRKS
294 if (err && (mmc->quirks & MMC_QUIRK_RETRY_SET_BLOCKLEN)) {
295 int retries = 4;
296 /*
297 * It has been seen that SET_BLOCKLEN may fail on the first
298 * attempt, let's try a few more time
299 */
300 do {
301 err = mmc_send_cmd(mmc, &cmd, NULL);
302 if (!err)
303 break;
304 } while (retries--);
305 }
306 #endif
307
308 return err;
309 }
310
311 #ifdef MMC_SUPPORTS_TUNING
312 static const u8 tuning_blk_pattern_4bit[] = {
313 0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
314 0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
315 0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb,
316 0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef,
317 0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c,
318 0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee,
319 0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff,
320 0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
321 };
322
323 static const u8 tuning_blk_pattern_8bit[] = {
324 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
325 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
326 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
327 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
328 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
329 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
330 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
331 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
332 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
333 0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
334 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
335 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
336 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
337 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
338 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
339 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
340 };
341
342 int mmc_send_tuning(struct mmc *mmc, u32 opcode, int *cmd_error)
343 {
344 struct mmc_cmd cmd;
345 struct mmc_data data;
346 const u8 *tuning_block_pattern;
347 int size, err;
348
349 if (mmc->bus_width == 8) {
350 tuning_block_pattern = tuning_blk_pattern_8bit;
351 size = sizeof(tuning_blk_pattern_8bit);
352 } else if (mmc->bus_width == 4) {
353 tuning_block_pattern = tuning_blk_pattern_4bit;
354 size = sizeof(tuning_blk_pattern_4bit);
355 } else {
356 return -EINVAL;
357 }
358
359 ALLOC_CACHE_ALIGN_BUFFER(u8, data_buf, size);
360
361 cmd.cmdidx = opcode;
362 cmd.cmdarg = 0;
363 cmd.resp_type = MMC_RSP_R1;
364
365 data.dest = (void *)data_buf;
366 data.blocks = 1;
367 data.blocksize = size;
368 data.flags = MMC_DATA_READ;
369
370 err = mmc_send_cmd(mmc, &cmd, &data);
371 if (err)
372 return err;
373
374 if (memcmp(data_buf, tuning_block_pattern, size))
375 return -EIO;
376
377 return 0;
378 }
379 #endif
380
381 static int mmc_read_blocks(struct mmc *mmc, void *dst, lbaint_t start,
382 lbaint_t blkcnt)
383 {
384 struct mmc_cmd cmd;
385 struct mmc_data data;
386
387 if (blkcnt > 1)
388 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
389 else
390 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
391
392 if (mmc->high_capacity)
393 cmd.cmdarg = start;
394 else
395 cmd.cmdarg = start * mmc->read_bl_len;
396
397 cmd.resp_type = MMC_RSP_R1;
398
399 data.dest = dst;
400 data.blocks = blkcnt;
401 data.blocksize = mmc->read_bl_len;
402 data.flags = MMC_DATA_READ;
403
404 if (mmc_send_cmd(mmc, &cmd, &data))
405 return 0;
406
407 if (blkcnt > 1) {
408 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
409 cmd.cmdarg = 0;
410 cmd.resp_type = MMC_RSP_R1b;
411 if (mmc_send_cmd(mmc, &cmd, NULL)) {
412 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
413 pr_err("mmc fail to send stop cmd\n");
414 #endif
415 return 0;
416 }
417 }
418
419 return blkcnt;
420 }
421
422 #if CONFIG_IS_ENABLED(BLK)
423 ulong mmc_bread(struct udevice *dev, lbaint_t start, lbaint_t blkcnt, void *dst)
424 #else
425 ulong mmc_bread(struct blk_desc *block_dev, lbaint_t start, lbaint_t blkcnt,
426 void *dst)
427 #endif
428 {
429 #if CONFIG_IS_ENABLED(BLK)
430 struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
431 #endif
432 int dev_num = block_dev->devnum;
433 int err;
434 lbaint_t cur, blocks_todo = blkcnt;
435
436 if (blkcnt == 0)
437 return 0;
438
439 struct mmc *mmc = find_mmc_device(dev_num);
440 if (!mmc)
441 return 0;
442
443 if (CONFIG_IS_ENABLED(MMC_TINY))
444 err = mmc_switch_part(mmc, block_dev->hwpart);
445 else
446 err = blk_dselect_hwpart(block_dev, block_dev->hwpart);
447
448 if (err < 0)
449 return 0;
450
451 if ((start + blkcnt) > block_dev->lba) {
452 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
453 pr_err("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n",
454 start + blkcnt, block_dev->lba);
455 #endif
456 return 0;
457 }
458
459 if (mmc_set_blocklen(mmc, mmc->read_bl_len)) {
460 debug("%s: Failed to set blocklen\n", __func__);
461 return 0;
462 }
463
464 do {
465 cur = (blocks_todo > mmc->cfg->b_max) ?
466 mmc->cfg->b_max : blocks_todo;
467 if (mmc_read_blocks(mmc, dst, start, cur) != cur) {
468 debug("%s: Failed to read blocks\n", __func__);
469 return 0;
470 }
471 blocks_todo -= cur;
472 start += cur;
473 dst += cur * mmc->read_bl_len;
474 } while (blocks_todo > 0);
475
476 return blkcnt;
477 }
478
479 static int mmc_go_idle(struct mmc *mmc)
480 {
481 struct mmc_cmd cmd;
482 int err;
483
484 udelay(1000);
485
486 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
487 cmd.cmdarg = 0;
488 cmd.resp_type = MMC_RSP_NONE;
489
490 err = mmc_send_cmd(mmc, &cmd, NULL);
491
492 if (err)
493 return err;
494
495 udelay(2000);
496
497 return 0;
498 }
499
500 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
501 static int mmc_switch_voltage(struct mmc *mmc, int signal_voltage)
502 {
503 struct mmc_cmd cmd;
504 int err = 0;
505
506 /*
507 * Send CMD11 only if the request is to switch the card to
508 * 1.8V signalling.
509 */
510 if (signal_voltage == MMC_SIGNAL_VOLTAGE_330)
511 return mmc_set_signal_voltage(mmc, signal_voltage);
512
513 cmd.cmdidx = SD_CMD_SWITCH_UHS18V;
514 cmd.cmdarg = 0;
515 cmd.resp_type = MMC_RSP_R1;
516
517 err = mmc_send_cmd(mmc, &cmd, NULL);
518 if (err)
519 return err;
520
521 if (!mmc_host_is_spi(mmc) && (cmd.response[0] & MMC_STATUS_ERROR))
522 return -EIO;
523
524 /*
525 * The card should drive cmd and dat[0:3] low immediately
526 * after the response of cmd11, but wait 100 us to be sure
527 */
528 err = mmc_wait_dat0(mmc, 0, 100);
529 if (err == -ENOSYS)
530 udelay(100);
531 else if (err)
532 return -ETIMEDOUT;
533
534 /*
535 * During a signal voltage level switch, the clock must be gated
536 * for 5 ms according to the SD spec
537 */
538 mmc_set_clock(mmc, mmc->clock, true);
539
540 err = mmc_set_signal_voltage(mmc, signal_voltage);
541 if (err)
542 return err;
543
544 /* Keep clock gated for at least 10 ms, though spec only says 5 ms */
545 mdelay(10);
546 mmc_set_clock(mmc, mmc->clock, false);
547
548 /*
549 * Failure to switch is indicated by the card holding
550 * dat[0:3] low. Wait for at least 1 ms according to spec
551 */
552 err = mmc_wait_dat0(mmc, 1, 1000);
553 if (err == -ENOSYS)
554 udelay(1000);
555 else if (err)
556 return -ETIMEDOUT;
557
558 return 0;
559 }
560 #endif
561
562 static int sd_send_op_cond(struct mmc *mmc, bool uhs_en)
563 {
564 int timeout = 1000;
565 int err;
566 struct mmc_cmd cmd;
567
568 while (1) {
569 cmd.cmdidx = MMC_CMD_APP_CMD;
570 cmd.resp_type = MMC_RSP_R1;
571 cmd.cmdarg = 0;
572
573 err = mmc_send_cmd(mmc, &cmd, NULL);
574
575 if (err)
576 return err;
577
578 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
579 cmd.resp_type = MMC_RSP_R3;
580
581 /*
582 * Most cards do not answer if some reserved bits
583 * in the ocr are set. However, Some controller
584 * can set bit 7 (reserved for low voltages), but
585 * how to manage low voltages SD card is not yet
586 * specified.
587 */
588 cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
589 (mmc->cfg->voltages & 0xff8000);
590
591 if (mmc->version == SD_VERSION_2)
592 cmd.cmdarg |= OCR_HCS;
593
594 if (uhs_en)
595 cmd.cmdarg |= OCR_S18R;
596
597 err = mmc_send_cmd(mmc, &cmd, NULL);
598
599 if (err)
600 return err;
601
602 if (cmd.response[0] & OCR_BUSY)
603 break;
604
605 if (timeout-- <= 0)
606 return -EOPNOTSUPP;
607
608 udelay(1000);
609 }
610
611 if (mmc->version != SD_VERSION_2)
612 mmc->version = SD_VERSION_1_0;
613
614 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
615 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
616 cmd.resp_type = MMC_RSP_R3;
617 cmd.cmdarg = 0;
618
619 err = mmc_send_cmd(mmc, &cmd, NULL);
620
621 if (err)
622 return err;
623 }
624
625 mmc->ocr = cmd.response[0];
626
627 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
628 if (uhs_en && !(mmc_host_is_spi(mmc)) && (cmd.response[0] & 0x41000000)
629 == 0x41000000) {
630 err = mmc_switch_voltage(mmc, MMC_SIGNAL_VOLTAGE_180);
631 if (err)
632 return err;
633 }
634 #endif
635
636 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
637 mmc->rca = 0;
638
639 return 0;
640 }
641
642 static int mmc_send_op_cond_iter(struct mmc *mmc, int use_arg)
643 {
644 struct mmc_cmd cmd;
645 int err;
646
647 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
648 cmd.resp_type = MMC_RSP_R3;
649 cmd.cmdarg = 0;
650 if (use_arg && !mmc_host_is_spi(mmc))
651 cmd.cmdarg = OCR_HCS |
652 (mmc->cfg->voltages &
653 (mmc->ocr & OCR_VOLTAGE_MASK)) |
654 (mmc->ocr & OCR_ACCESS_MODE);
655
656 err = mmc_send_cmd(mmc, &cmd, NULL);
657 if (err)
658 return err;
659 mmc->ocr = cmd.response[0];
660 return 0;
661 }
662
663 static int mmc_send_op_cond(struct mmc *mmc)
664 {
665 int err, i;
666
667 /* Some cards seem to need this */
668 mmc_go_idle(mmc);
669
670 /* Asking to the card its capabilities */
671 for (i = 0; i < 2; i++) {
672 err = mmc_send_op_cond_iter(mmc, i != 0);
673 if (err)
674 return err;
675
676 /* exit if not busy (flag seems to be inverted) */
677 if (mmc->ocr & OCR_BUSY)
678 break;
679 }
680 mmc->op_cond_pending = 1;
681 return 0;
682 }
683
684 static int mmc_complete_op_cond(struct mmc *mmc)
685 {
686 struct mmc_cmd cmd;
687 int timeout = 1000;
688 uint start;
689 int err;
690
691 mmc->op_cond_pending = 0;
692 if (!(mmc->ocr & OCR_BUSY)) {
693 /* Some cards seem to need this */
694 mmc_go_idle(mmc);
695
696 start = get_timer(0);
697 while (1) {
698 err = mmc_send_op_cond_iter(mmc, 1);
699 if (err)
700 return err;
701 if (mmc->ocr & OCR_BUSY)
702 break;
703 if (get_timer(start) > timeout)
704 return -EOPNOTSUPP;
705 udelay(100);
706 }
707 }
708
709 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
710 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
711 cmd.resp_type = MMC_RSP_R3;
712 cmd.cmdarg = 0;
713
714 err = mmc_send_cmd(mmc, &cmd, NULL);
715
716 if (err)
717 return err;
718
719 mmc->ocr = cmd.response[0];
720 }
721
722 mmc->version = MMC_VERSION_UNKNOWN;
723
724 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
725 mmc->rca = 1;
726
727 return 0;
728 }
729
730
731 static int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
732 {
733 struct mmc_cmd cmd;
734 struct mmc_data data;
735 int err;
736
737 /* Get the Card Status Register */
738 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
739 cmd.resp_type = MMC_RSP_R1;
740 cmd.cmdarg = 0;
741
742 data.dest = (char *)ext_csd;
743 data.blocks = 1;
744 data.blocksize = MMC_MAX_BLOCK_LEN;
745 data.flags = MMC_DATA_READ;
746
747 err = mmc_send_cmd(mmc, &cmd, &data);
748
749 return err;
750 }
751
752 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
753 {
754 struct mmc_cmd cmd;
755 int timeout = 1000;
756 int retries = 3;
757 int ret;
758
759 cmd.cmdidx = MMC_CMD_SWITCH;
760 cmd.resp_type = MMC_RSP_R1b;
761 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
762 (index << 16) |
763 (value << 8);
764
765 while (retries > 0) {
766 ret = mmc_send_cmd(mmc, &cmd, NULL);
767
768 /* Waiting for the ready status */
769 if (!ret) {
770 ret = mmc_send_status(mmc, timeout);
771 return ret;
772 }
773
774 retries--;
775 }
776
777 return ret;
778
779 }
780
781 static int mmc_set_card_speed(struct mmc *mmc, enum bus_mode mode)
782 {
783 int err;
784 int speed_bits;
785
786 ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN);
787
788 switch (mode) {
789 case MMC_HS:
790 case MMC_HS_52:
791 case MMC_DDR_52:
792 speed_bits = EXT_CSD_TIMING_HS;
793 break;
794 #if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
795 case MMC_HS_200:
796 speed_bits = EXT_CSD_TIMING_HS200;
797 break;
798 #endif
799 case MMC_LEGACY:
800 speed_bits = EXT_CSD_TIMING_LEGACY;
801 break;
802 default:
803 return -EINVAL;
804 }
805 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING,
806 speed_bits);
807 if (err)
808 return err;
809
810 if ((mode == MMC_HS) || (mode == MMC_HS_52)) {
811 /* Now check to see that it worked */
812 err = mmc_send_ext_csd(mmc, test_csd);
813 if (err)
814 return err;
815
816 /* No high-speed support */
817 if (!test_csd[EXT_CSD_HS_TIMING])
818 return -ENOTSUPP;
819 }
820
821 return 0;
822 }
823
824 static int mmc_get_capabilities(struct mmc *mmc)
825 {
826 u8 *ext_csd = mmc->ext_csd;
827 char cardtype;
828
829 mmc->card_caps = MMC_MODE_1BIT | MMC_CAP(MMC_LEGACY);
830
831 if (mmc_host_is_spi(mmc))
832 return 0;
833
834 /* Only version 4 supports high-speed */
835 if (mmc->version < MMC_VERSION_4)
836 return 0;
837
838 if (!ext_csd) {
839 pr_err("No ext_csd found!\n"); /* this should enver happen */
840 return -ENOTSUPP;
841 }
842
843 mmc->card_caps |= MMC_MODE_4BIT | MMC_MODE_8BIT;
844
845 cardtype = ext_csd[EXT_CSD_CARD_TYPE] & 0x3f;
846 mmc->cardtype = cardtype;
847
848 #if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
849 if (cardtype & (EXT_CSD_CARD_TYPE_HS200_1_2V |
850 EXT_CSD_CARD_TYPE_HS200_1_8V)) {
851 mmc->card_caps |= MMC_MODE_HS200;
852 }
853 #endif
854 if (cardtype & EXT_CSD_CARD_TYPE_52) {
855 if (cardtype & EXT_CSD_CARD_TYPE_DDR_52)
856 mmc->card_caps |= MMC_MODE_DDR_52MHz;
857 mmc->card_caps |= MMC_MODE_HS_52MHz;
858 }
859 if (cardtype & EXT_CSD_CARD_TYPE_26)
860 mmc->card_caps |= MMC_MODE_HS;
861
862 return 0;
863 }
864
865 static int mmc_set_capacity(struct mmc *mmc, int part_num)
866 {
867 switch (part_num) {
868 case 0:
869 mmc->capacity = mmc->capacity_user;
870 break;
871 case 1:
872 case 2:
873 mmc->capacity = mmc->capacity_boot;
874 break;
875 case 3:
876 mmc->capacity = mmc->capacity_rpmb;
877 break;
878 case 4:
879 case 5:
880 case 6:
881 case 7:
882 mmc->capacity = mmc->capacity_gp[part_num - 4];
883 break;
884 default:
885 return -1;
886 }
887
888 mmc_get_blk_desc(mmc)->lba = lldiv(mmc->capacity, mmc->read_bl_len);
889
890 return 0;
891 }
892
893 #if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
894 static int mmc_boot_part_access_chk(struct mmc *mmc, unsigned int part_num)
895 {
896 int forbidden = 0;
897 bool change = false;
898
899 if (part_num & PART_ACCESS_MASK)
900 forbidden = MMC_CAP(MMC_HS_200);
901
902 if (MMC_CAP(mmc->selected_mode) & forbidden) {
903 debug("selected mode (%s) is forbidden for part %d\n",
904 mmc_mode_name(mmc->selected_mode), part_num);
905 change = true;
906 } else if (mmc->selected_mode != mmc->best_mode) {
907 debug("selected mode is not optimal\n");
908 change = true;
909 }
910
911 if (change)
912 return mmc_select_mode_and_width(mmc,
913 mmc->card_caps & ~forbidden);
914
915 return 0;
916 }
917 #else
918 static inline int mmc_boot_part_access_chk(struct mmc *mmc,
919 unsigned int part_num)
920 {
921 return 0;
922 }
923 #endif
924
925 int mmc_switch_part(struct mmc *mmc, unsigned int part_num)
926 {
927 int ret;
928
929 ret = mmc_boot_part_access_chk(mmc, part_num);
930 if (ret)
931 return ret;
932
933 ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
934 (mmc->part_config & ~PART_ACCESS_MASK)
935 | (part_num & PART_ACCESS_MASK));
936
937 /*
938 * Set the capacity if the switch succeeded or was intended
939 * to return to representing the raw device.
940 */
941 if ((ret == 0) || ((ret == -ENODEV) && (part_num == 0))) {
942 ret = mmc_set_capacity(mmc, part_num);
943 mmc_get_blk_desc(mmc)->hwpart = part_num;
944 }
945
946 return ret;
947 }
948
949 #if CONFIG_IS_ENABLED(MMC_HW_PARTITIONING)
950 int mmc_hwpart_config(struct mmc *mmc,
951 const struct mmc_hwpart_conf *conf,
952 enum mmc_hwpart_conf_mode mode)
953 {
954 u8 part_attrs = 0;
955 u32 enh_size_mult;
956 u32 enh_start_addr;
957 u32 gp_size_mult[4];
958 u32 max_enh_size_mult;
959 u32 tot_enh_size_mult = 0;
960 u8 wr_rel_set;
961 int i, pidx, err;
962 ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
963
964 if (mode < MMC_HWPART_CONF_CHECK || mode > MMC_HWPART_CONF_COMPLETE)
965 return -EINVAL;
966
967 if (IS_SD(mmc) || (mmc->version < MMC_VERSION_4_41)) {
968 pr_err("eMMC >= 4.4 required for enhanced user data area\n");
969 return -EMEDIUMTYPE;
970 }
971
972 if (!(mmc->part_support & PART_SUPPORT)) {
973 pr_err("Card does not support partitioning\n");
974 return -EMEDIUMTYPE;
975 }
976
977 if (!mmc->hc_wp_grp_size) {
978 pr_err("Card does not define HC WP group size\n");
979 return -EMEDIUMTYPE;
980 }
981
982 /* check partition alignment and total enhanced size */
983 if (conf->user.enh_size) {
984 if (conf->user.enh_size % mmc->hc_wp_grp_size ||
985 conf->user.enh_start % mmc->hc_wp_grp_size) {
986 pr_err("User data enhanced area not HC WP group "
987 "size aligned\n");
988 return -EINVAL;
989 }
990 part_attrs |= EXT_CSD_ENH_USR;
991 enh_size_mult = conf->user.enh_size / mmc->hc_wp_grp_size;
992 if (mmc->high_capacity) {
993 enh_start_addr = conf->user.enh_start;
994 } else {
995 enh_start_addr = (conf->user.enh_start << 9);
996 }
997 } else {
998 enh_size_mult = 0;
999 enh_start_addr = 0;
1000 }
1001 tot_enh_size_mult += enh_size_mult;
1002
1003 for (pidx = 0; pidx < 4; pidx++) {
1004 if (conf->gp_part[pidx].size % mmc->hc_wp_grp_size) {
1005 pr_err("GP%i partition not HC WP group size "
1006 "aligned\n", pidx+1);
1007 return -EINVAL;
1008 }
1009 gp_size_mult[pidx] = conf->gp_part[pidx].size / mmc->hc_wp_grp_size;
1010 if (conf->gp_part[pidx].size && conf->gp_part[pidx].enhanced) {
1011 part_attrs |= EXT_CSD_ENH_GP(pidx);
1012 tot_enh_size_mult += gp_size_mult[pidx];
1013 }
1014 }
1015
1016 if (part_attrs && ! (mmc->part_support & ENHNCD_SUPPORT)) {
1017 pr_err("Card does not support enhanced attribute\n");
1018 return -EMEDIUMTYPE;
1019 }
1020
1021 err = mmc_send_ext_csd(mmc, ext_csd);
1022 if (err)
1023 return err;
1024
1025 max_enh_size_mult =
1026 (ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT+2] << 16) +
1027 (ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT+1] << 8) +
1028 ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT];
1029 if (tot_enh_size_mult > max_enh_size_mult) {
1030 pr_err("Total enhanced size exceeds maximum (%u > %u)\n",
1031 tot_enh_size_mult, max_enh_size_mult);
1032 return -EMEDIUMTYPE;
1033 }
1034
1035 /* The default value of EXT_CSD_WR_REL_SET is device
1036 * dependent, the values can only be changed if the
1037 * EXT_CSD_HS_CTRL_REL bit is set. The values can be
1038 * changed only once and before partitioning is completed. */
1039 wr_rel_set = ext_csd[EXT_CSD_WR_REL_SET];
1040 if (conf->user.wr_rel_change) {
1041 if (conf->user.wr_rel_set)
1042 wr_rel_set |= EXT_CSD_WR_DATA_REL_USR;
1043 else
1044 wr_rel_set &= ~EXT_CSD_WR_DATA_REL_USR;
1045 }
1046 for (pidx = 0; pidx < 4; pidx++) {
1047 if (conf->gp_part[pidx].wr_rel_change) {
1048 if (conf->gp_part[pidx].wr_rel_set)
1049 wr_rel_set |= EXT_CSD_WR_DATA_REL_GP(pidx);
1050 else
1051 wr_rel_set &= ~EXT_CSD_WR_DATA_REL_GP(pidx);
1052 }
1053 }
1054
1055 if (wr_rel_set != ext_csd[EXT_CSD_WR_REL_SET] &&
1056 !(ext_csd[EXT_CSD_WR_REL_PARAM] & EXT_CSD_HS_CTRL_REL)) {
1057 puts("Card does not support host controlled partition write "
1058 "reliability settings\n");
1059 return -EMEDIUMTYPE;
1060 }
1061
1062 if (ext_csd[EXT_CSD_PARTITION_SETTING] &
1063 EXT_CSD_PARTITION_SETTING_COMPLETED) {
1064 pr_err("Card already partitioned\n");
1065 return -EPERM;
1066 }
1067
1068 if (mode == MMC_HWPART_CONF_CHECK)
1069 return 0;
1070
1071 /* Partitioning requires high-capacity size definitions */
1072 if (!(ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01)) {
1073 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1074 EXT_CSD_ERASE_GROUP_DEF, 1);
1075
1076 if (err)
1077 return err;
1078
1079 ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1;
1080
1081 /* update erase group size to be high-capacity */
1082 mmc->erase_grp_size =
1083 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024;
1084
1085 }
1086
1087 /* all OK, write the configuration */
1088 for (i = 0; i < 4; i++) {
1089 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1090 EXT_CSD_ENH_START_ADDR+i,
1091 (enh_start_addr >> (i*8)) & 0xFF);
1092 if (err)
1093 return err;
1094 }
1095 for (i = 0; i < 3; i++) {
1096 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1097 EXT_CSD_ENH_SIZE_MULT+i,
1098 (enh_size_mult >> (i*8)) & 0xFF);
1099 if (err)
1100 return err;
1101 }
1102 for (pidx = 0; pidx < 4; pidx++) {
1103 for (i = 0; i < 3; i++) {
1104 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1105 EXT_CSD_GP_SIZE_MULT+pidx*3+i,
1106 (gp_size_mult[pidx] >> (i*8)) & 0xFF);
1107 if (err)
1108 return err;
1109 }
1110 }
1111 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1112 EXT_CSD_PARTITIONS_ATTRIBUTE, part_attrs);
1113 if (err)
1114 return err;
1115
1116 if (mode == MMC_HWPART_CONF_SET)
1117 return 0;
1118
1119 /* The WR_REL_SET is a write-once register but shall be
1120 * written before setting PART_SETTING_COMPLETED. As it is
1121 * write-once we can only write it when completing the
1122 * partitioning. */
1123 if (wr_rel_set != ext_csd[EXT_CSD_WR_REL_SET]) {
1124 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1125 EXT_CSD_WR_REL_SET, wr_rel_set);
1126 if (err)
1127 return err;
1128 }
1129
1130 /* Setting PART_SETTING_COMPLETED confirms the partition
1131 * configuration but it only becomes effective after power
1132 * cycle, so we do not adjust the partition related settings
1133 * in the mmc struct. */
1134
1135 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1136 EXT_CSD_PARTITION_SETTING,
1137 EXT_CSD_PARTITION_SETTING_COMPLETED);
1138 if (err)
1139 return err;
1140
1141 return 0;
1142 }
1143 #endif
1144
1145 #if !CONFIG_IS_ENABLED(DM_MMC)
1146 int mmc_getcd(struct mmc *mmc)
1147 {
1148 int cd;
1149
1150 cd = board_mmc_getcd(mmc);
1151
1152 if (cd < 0) {
1153 if (mmc->cfg->ops->getcd)
1154 cd = mmc->cfg->ops->getcd(mmc);
1155 else
1156 cd = 1;
1157 }
1158
1159 return cd;
1160 }
1161 #endif
1162
1163 static int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
1164 {
1165 struct mmc_cmd cmd;
1166 struct mmc_data data;
1167
1168 /* Switch the frequency */
1169 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
1170 cmd.resp_type = MMC_RSP_R1;
1171 cmd.cmdarg = (mode << 31) | 0xffffff;
1172 cmd.cmdarg &= ~(0xf << (group * 4));
1173 cmd.cmdarg |= value << (group * 4);
1174
1175 data.dest = (char *)resp;
1176 data.blocksize = 64;
1177 data.blocks = 1;
1178 data.flags = MMC_DATA_READ;
1179
1180 return mmc_send_cmd(mmc, &cmd, &data);
1181 }
1182
1183
1184 static int sd_get_capabilities(struct mmc *mmc)
1185 {
1186 int err;
1187 struct mmc_cmd cmd;
1188 ALLOC_CACHE_ALIGN_BUFFER(__be32, scr, 2);
1189 ALLOC_CACHE_ALIGN_BUFFER(__be32, switch_status, 16);
1190 struct mmc_data data;
1191 int timeout;
1192 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
1193 u32 sd3_bus_mode;
1194 #endif
1195
1196 mmc->card_caps = MMC_MODE_1BIT | MMC_CAP(SD_LEGACY);
1197
1198 if (mmc_host_is_spi(mmc))
1199 return 0;
1200
1201 /* Read the SCR to find out if this card supports higher speeds */
1202 cmd.cmdidx = MMC_CMD_APP_CMD;
1203 cmd.resp_type = MMC_RSP_R1;
1204 cmd.cmdarg = mmc->rca << 16;
1205
1206 err = mmc_send_cmd(mmc, &cmd, NULL);
1207
1208 if (err)
1209 return err;
1210
1211 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
1212 cmd.resp_type = MMC_RSP_R1;
1213 cmd.cmdarg = 0;
1214
1215 timeout = 3;
1216
1217 retry_scr:
1218 data.dest = (char *)scr;
1219 data.blocksize = 8;
1220 data.blocks = 1;
1221 data.flags = MMC_DATA_READ;
1222
1223 err = mmc_send_cmd(mmc, &cmd, &data);
1224
1225 if (err) {
1226 if (timeout--)
1227 goto retry_scr;
1228
1229 return err;
1230 }
1231
1232 mmc->scr[0] = __be32_to_cpu(scr[0]);
1233 mmc->scr[1] = __be32_to_cpu(scr[1]);
1234
1235 switch ((mmc->scr[0] >> 24) & 0xf) {
1236 case 0:
1237 mmc->version = SD_VERSION_1_0;
1238 break;
1239 case 1:
1240 mmc->version = SD_VERSION_1_10;
1241 break;
1242 case 2:
1243 mmc->version = SD_VERSION_2;
1244 if ((mmc->scr[0] >> 15) & 0x1)
1245 mmc->version = SD_VERSION_3;
1246 break;
1247 default:
1248 mmc->version = SD_VERSION_1_0;
1249 break;
1250 }
1251
1252 if (mmc->scr[0] & SD_DATA_4BIT)
1253 mmc->card_caps |= MMC_MODE_4BIT;
1254
1255 /* Version 1.0 doesn't support switching */
1256 if (mmc->version == SD_VERSION_1_0)
1257 return 0;
1258
1259 timeout = 4;
1260 while (timeout--) {
1261 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
1262 (u8 *)switch_status);
1263
1264 if (err)
1265 return err;
1266
1267 /* The high-speed function is busy. Try again */
1268 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
1269 break;
1270 }
1271
1272 /* If high-speed isn't supported, we return */
1273 if (__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED)
1274 mmc->card_caps |= MMC_CAP(SD_HS);
1275
1276 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
1277 /* Version before 3.0 don't support UHS modes */
1278 if (mmc->version < SD_VERSION_3)
1279 return 0;
1280
1281 sd3_bus_mode = __be32_to_cpu(switch_status[3]) >> 16 & 0x1f;
1282 if (sd3_bus_mode & SD_MODE_UHS_SDR104)
1283 mmc->card_caps |= MMC_CAP(UHS_SDR104);
1284 if (sd3_bus_mode & SD_MODE_UHS_SDR50)
1285 mmc->card_caps |= MMC_CAP(UHS_SDR50);
1286 if (sd3_bus_mode & SD_MODE_UHS_SDR25)
1287 mmc->card_caps |= MMC_CAP(UHS_SDR25);
1288 if (sd3_bus_mode & SD_MODE_UHS_SDR12)
1289 mmc->card_caps |= MMC_CAP(UHS_SDR12);
1290 if (sd3_bus_mode & SD_MODE_UHS_DDR50)
1291 mmc->card_caps |= MMC_CAP(UHS_DDR50);
1292 #endif
1293
1294 return 0;
1295 }
1296
1297 static int sd_set_card_speed(struct mmc *mmc, enum bus_mode mode)
1298 {
1299 int err;
1300
1301 ALLOC_CACHE_ALIGN_BUFFER(uint, switch_status, 16);
1302 int speed;
1303
1304 switch (mode) {
1305 case SD_LEGACY:
1306 speed = UHS_SDR12_BUS_SPEED;
1307 break;
1308 case SD_HS:
1309 speed = HIGH_SPEED_BUS_SPEED;
1310 break;
1311 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
1312 case UHS_SDR12:
1313 speed = UHS_SDR12_BUS_SPEED;
1314 break;
1315 case UHS_SDR25:
1316 speed = UHS_SDR25_BUS_SPEED;
1317 break;
1318 case UHS_SDR50:
1319 speed = UHS_SDR50_BUS_SPEED;
1320 break;
1321 case UHS_DDR50:
1322 speed = UHS_DDR50_BUS_SPEED;
1323 break;
1324 case UHS_SDR104:
1325 speed = UHS_SDR104_BUS_SPEED;
1326 break;
1327 #endif
1328 default:
1329 return -EINVAL;
1330 }
1331
1332 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, speed, (u8 *)switch_status);
1333 if (err)
1334 return err;
1335
1336 if ((__be32_to_cpu(switch_status[4]) >> 24) != speed)
1337 return -ENOTSUPP;
1338
1339 return 0;
1340 }
1341
1342 int sd_select_bus_width(struct mmc *mmc, int w)
1343 {
1344 int err;
1345 struct mmc_cmd cmd;
1346
1347 if ((w != 4) && (w != 1))
1348 return -EINVAL;
1349
1350 cmd.cmdidx = MMC_CMD_APP_CMD;
1351 cmd.resp_type = MMC_RSP_R1;
1352 cmd.cmdarg = mmc->rca << 16;
1353
1354 err = mmc_send_cmd(mmc, &cmd, NULL);
1355 if (err)
1356 return err;
1357
1358 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
1359 cmd.resp_type = MMC_RSP_R1;
1360 if (w == 4)
1361 cmd.cmdarg = 2;
1362 else if (w == 1)
1363 cmd.cmdarg = 0;
1364 err = mmc_send_cmd(mmc, &cmd, NULL);
1365 if (err)
1366 return err;
1367
1368 return 0;
1369 }
1370
1371 #if CONFIG_IS_ENABLED(MMC_WRITE)
1372 static int sd_read_ssr(struct mmc *mmc)
1373 {
1374 static const unsigned int sd_au_size[] = {
1375 0, SZ_16K / 512, SZ_32K / 512,
1376 SZ_64K / 512, SZ_128K / 512, SZ_256K / 512,
1377 SZ_512K / 512, SZ_1M / 512, SZ_2M / 512,
1378 SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512,
1379 SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512,
1380 SZ_64M / 512,
1381 };
1382 int err, i;
1383 struct mmc_cmd cmd;
1384 ALLOC_CACHE_ALIGN_BUFFER(uint, ssr, 16);
1385 struct mmc_data data;
1386 int timeout = 3;
1387 unsigned int au, eo, et, es;
1388
1389 cmd.cmdidx = MMC_CMD_APP_CMD;
1390 cmd.resp_type = MMC_RSP_R1;
1391 cmd.cmdarg = mmc->rca << 16;
1392
1393 err = mmc_send_cmd(mmc, &cmd, NULL);
1394 if (err)
1395 return err;
1396
1397 cmd.cmdidx = SD_CMD_APP_SD_STATUS;
1398 cmd.resp_type = MMC_RSP_R1;
1399 cmd.cmdarg = 0;
1400
1401 retry_ssr:
1402 data.dest = (char *)ssr;
1403 data.blocksize = 64;
1404 data.blocks = 1;
1405 data.flags = MMC_DATA_READ;
1406
1407 err = mmc_send_cmd(mmc, &cmd, &data);
1408 if (err) {
1409 if (timeout--)
1410 goto retry_ssr;
1411
1412 return err;
1413 }
1414
1415 for (i = 0; i < 16; i++)
1416 ssr[i] = be32_to_cpu(ssr[i]);
1417
1418 au = (ssr[2] >> 12) & 0xF;
1419 if ((au <= 9) || (mmc->version == SD_VERSION_3)) {
1420 mmc->ssr.au = sd_au_size[au];
1421 es = (ssr[3] >> 24) & 0xFF;
1422 es |= (ssr[2] & 0xFF) << 8;
1423 et = (ssr[3] >> 18) & 0x3F;
1424 if (es && et) {
1425 eo = (ssr[3] >> 16) & 0x3;
1426 mmc->ssr.erase_timeout = (et * 1000) / es;
1427 mmc->ssr.erase_offset = eo * 1000;
1428 }
1429 } else {
1430 debug("Invalid Allocation Unit Size.\n");
1431 }
1432
1433 return 0;
1434 }
1435 #endif
1436 /* frequency bases */
1437 /* divided by 10 to be nice to platforms without floating point */
1438 static const int fbase[] = {
1439 10000,
1440 100000,
1441 1000000,
1442 10000000,
1443 };
1444
1445 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
1446 * to platforms without floating point.
1447 */
1448 static const u8 multipliers[] = {
1449 0, /* reserved */
1450 10,
1451 12,
1452 13,
1453 15,
1454 20,
1455 25,
1456 30,
1457 35,
1458 40,
1459 45,
1460 50,
1461 55,
1462 60,
1463 70,
1464 80,
1465 };
1466
1467 static inline int bus_width(uint cap)
1468 {
1469 if (cap == MMC_MODE_8BIT)
1470 return 8;
1471 if (cap == MMC_MODE_4BIT)
1472 return 4;
1473 if (cap == MMC_MODE_1BIT)
1474 return 1;
1475 pr_warn("invalid bus witdh capability 0x%x\n", cap);
1476 return 0;
1477 }
1478
1479 #if !CONFIG_IS_ENABLED(DM_MMC)
1480 #ifdef MMC_SUPPORTS_TUNING
1481 static int mmc_execute_tuning(struct mmc *mmc, uint opcode)
1482 {
1483 return -ENOTSUPP;
1484 }
1485 #endif
1486
1487 static void mmc_send_init_stream(struct mmc *mmc)
1488 {
1489 }
1490
1491 static int mmc_set_ios(struct mmc *mmc)
1492 {
1493 int ret = 0;
1494
1495 if (mmc->cfg->ops->set_ios)
1496 ret = mmc->cfg->ops->set_ios(mmc);
1497
1498 return ret;
1499 }
1500 #endif
1501
1502 int mmc_set_clock(struct mmc *mmc, uint clock, bool disable)
1503 {
1504 if (clock > mmc->cfg->f_max)
1505 clock = mmc->cfg->f_max;
1506
1507 if (clock < mmc->cfg->f_min)
1508 clock = mmc->cfg->f_min;
1509
1510 mmc->clock = clock;
1511 mmc->clk_disable = disable;
1512
1513 return mmc_set_ios(mmc);
1514 }
1515
1516 static int mmc_set_bus_width(struct mmc *mmc, uint width)
1517 {
1518 mmc->bus_width = width;
1519
1520 return mmc_set_ios(mmc);
1521 }
1522
1523 #if CONFIG_IS_ENABLED(MMC_VERBOSE) || defined(DEBUG)
1524 /*
1525 * helper function to display the capabilities in a human
1526 * friendly manner. The capabilities include bus width and
1527 * supported modes.
1528 */
1529 void mmc_dump_capabilities(const char *text, uint caps)
1530 {
1531 enum bus_mode mode;
1532
1533 printf("%s: widths [", text);
1534 if (caps & MMC_MODE_8BIT)
1535 printf("8, ");
1536 if (caps & MMC_MODE_4BIT)
1537 printf("4, ");
1538 if (caps & MMC_MODE_1BIT)
1539 printf("1, ");
1540 printf("\b\b] modes [");
1541 for (mode = MMC_LEGACY; mode < MMC_MODES_END; mode++)
1542 if (MMC_CAP(mode) & caps)
1543 printf("%s, ", mmc_mode_name(mode));
1544 printf("\b\b]\n");
1545 }
1546 #endif
1547
1548 struct mode_width_tuning {
1549 enum bus_mode mode;
1550 uint widths;
1551 #ifdef MMC_SUPPORTS_TUNING
1552 uint tuning;
1553 #endif
1554 };
1555
1556 #if CONFIG_IS_ENABLED(MMC_IO_VOLTAGE)
1557 int mmc_voltage_to_mv(enum mmc_voltage voltage)
1558 {
1559 switch (voltage) {
1560 case MMC_SIGNAL_VOLTAGE_000: return 0;
1561 case MMC_SIGNAL_VOLTAGE_330: return 3300;
1562 case MMC_SIGNAL_VOLTAGE_180: return 1800;
1563 case MMC_SIGNAL_VOLTAGE_120: return 1200;
1564 }
1565 return -EINVAL;
1566 }
1567
1568 static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage)
1569 {
1570 int err;
1571
1572 if (mmc->signal_voltage == signal_voltage)
1573 return 0;
1574
1575 mmc->signal_voltage = signal_voltage;
1576 err = mmc_set_ios(mmc);
1577 if (err)
1578 debug("unable to set voltage (err %d)\n", err);
1579
1580 return err;
1581 }
1582 #else
1583 static inline int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage)
1584 {
1585 return 0;
1586 }
1587 #endif
1588
1589 static const struct mode_width_tuning sd_modes_by_pref[] = {
1590 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
1591 #ifdef MMC_SUPPORTS_TUNING
1592 {
1593 .mode = UHS_SDR104,
1594 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
1595 .tuning = MMC_CMD_SEND_TUNING_BLOCK
1596 },
1597 #endif
1598 {
1599 .mode = UHS_SDR50,
1600 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
1601 },
1602 {
1603 .mode = UHS_DDR50,
1604 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
1605 },
1606 {
1607 .mode = UHS_SDR25,
1608 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
1609 },
1610 #endif
1611 {
1612 .mode = SD_HS,
1613 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
1614 },
1615 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
1616 {
1617 .mode = UHS_SDR12,
1618 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
1619 },
1620 #endif
1621 {
1622 .mode = SD_LEGACY,
1623 .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
1624 }
1625 };
1626
1627 #define for_each_sd_mode_by_pref(caps, mwt) \
1628 for (mwt = sd_modes_by_pref;\
1629 mwt < sd_modes_by_pref + ARRAY_SIZE(sd_modes_by_pref);\
1630 mwt++) \
1631 if (caps & MMC_CAP(mwt->mode))
1632
1633 static int sd_select_mode_and_width(struct mmc *mmc, uint card_caps)
1634 {
1635 int err;
1636 uint widths[] = {MMC_MODE_4BIT, MMC_MODE_1BIT};
1637 const struct mode_width_tuning *mwt;
1638 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
1639 bool uhs_en = (mmc->ocr & OCR_S18R) ? true : false;
1640 #else
1641 bool uhs_en = false;
1642 #endif
1643 uint caps;
1644
1645 #ifdef DEBUG
1646 mmc_dump_capabilities("sd card", card_caps);
1647 mmc_dump_capabilities("host", mmc->host_caps);
1648 #endif
1649
1650 /* Restrict card's capabilities by what the host can do */
1651 caps = card_caps & mmc->host_caps;
1652
1653 if (!uhs_en)
1654 caps &= ~UHS_CAPS;
1655
1656 for_each_sd_mode_by_pref(caps, mwt) {
1657 uint *w;
1658
1659 for (w = widths; w < widths + ARRAY_SIZE(widths); w++) {
1660 if (*w & caps & mwt->widths) {
1661 debug("trying mode %s width %d (at %d MHz)\n",
1662 mmc_mode_name(mwt->mode),
1663 bus_width(*w),
1664 mmc_mode2freq(mmc, mwt->mode) / 1000000);
1665
1666 /* configure the bus width (card + host) */
1667 err = sd_select_bus_width(mmc, bus_width(*w));
1668 if (err)
1669 goto error;
1670 mmc_set_bus_width(mmc, bus_width(*w));
1671
1672 /* configure the bus mode (card) */
1673 err = sd_set_card_speed(mmc, mwt->mode);
1674 if (err)
1675 goto error;
1676
1677 /* configure the bus mode (host) */
1678 mmc_select_mode(mmc, mwt->mode);
1679 mmc_set_clock(mmc, mmc->tran_speed, false);
1680
1681 #ifdef MMC_SUPPORTS_TUNING
1682 /* execute tuning if needed */
1683 if (mwt->tuning && !mmc_host_is_spi(mmc)) {
1684 err = mmc_execute_tuning(mmc,
1685 mwt->tuning);
1686 if (err) {
1687 debug("tuning failed\n");
1688 goto error;
1689 }
1690 }
1691 #endif
1692
1693 #if CONFIG_IS_ENABLED(MMC_WRITE)
1694 err = sd_read_ssr(mmc);
1695 if (!err)
1696 pr_warn("unable to read ssr\n");
1697 #endif
1698 if (!err)
1699 return 0;
1700
1701 error:
1702 /* revert to a safer bus speed */
1703 mmc_select_mode(mmc, SD_LEGACY);
1704 mmc_set_clock(mmc, mmc->tran_speed, false);
1705 }
1706 }
1707 }
1708
1709 printf("unable to select a mode\n");
1710 return -ENOTSUPP;
1711 }
1712
1713 /*
1714 * read the compare the part of ext csd that is constant.
1715 * This can be used to check that the transfer is working
1716 * as expected.
1717 */
1718 static int mmc_read_and_compare_ext_csd(struct mmc *mmc)
1719 {
1720 int err;
1721 const u8 *ext_csd = mmc->ext_csd;
1722 ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN);
1723
1724 if (mmc->version < MMC_VERSION_4)
1725 return 0;
1726
1727 err = mmc_send_ext_csd(mmc, test_csd);
1728 if (err)
1729 return err;
1730
1731 /* Only compare read only fields */
1732 if (ext_csd[EXT_CSD_PARTITIONING_SUPPORT]
1733 == test_csd[EXT_CSD_PARTITIONING_SUPPORT] &&
1734 ext_csd[EXT_CSD_HC_WP_GRP_SIZE]
1735 == test_csd[EXT_CSD_HC_WP_GRP_SIZE] &&
1736 ext_csd[EXT_CSD_REV]
1737 == test_csd[EXT_CSD_REV] &&
1738 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
1739 == test_csd[EXT_CSD_HC_ERASE_GRP_SIZE] &&
1740 memcmp(&ext_csd[EXT_CSD_SEC_CNT],
1741 &test_csd[EXT_CSD_SEC_CNT], 4) == 0)
1742 return 0;
1743
1744 return -EBADMSG;
1745 }
1746
1747 #if CONFIG_IS_ENABLED(MMC_IO_VOLTAGE)
1748 static int mmc_set_lowest_voltage(struct mmc *mmc, enum bus_mode mode,
1749 uint32_t allowed_mask)
1750 {
1751 u32 card_mask = 0;
1752
1753 switch (mode) {
1754 case MMC_HS_200:
1755 if (mmc->cardtype & EXT_CSD_CARD_TYPE_HS200_1_8V)
1756 card_mask |= MMC_SIGNAL_VOLTAGE_180;
1757 if (mmc->cardtype & EXT_CSD_CARD_TYPE_HS200_1_2V)
1758 card_mask |= MMC_SIGNAL_VOLTAGE_120;
1759 break;
1760 case MMC_DDR_52:
1761 if (mmc->cardtype & EXT_CSD_CARD_TYPE_DDR_1_8V)
1762 card_mask |= MMC_SIGNAL_VOLTAGE_330 |
1763 MMC_SIGNAL_VOLTAGE_180;
1764 if (mmc->cardtype & EXT_CSD_CARD_TYPE_DDR_1_2V)
1765 card_mask |= MMC_SIGNAL_VOLTAGE_120;
1766 break;
1767 default:
1768 card_mask |= MMC_SIGNAL_VOLTAGE_330;
1769 break;
1770 }
1771
1772 while (card_mask & allowed_mask) {
1773 enum mmc_voltage best_match;
1774
1775 best_match = 1 << (ffs(card_mask & allowed_mask) - 1);
1776 if (!mmc_set_signal_voltage(mmc, best_match))
1777 return 0;
1778
1779 allowed_mask &= ~best_match;
1780 }
1781
1782 return -ENOTSUPP;
1783 }
1784 #else
1785 static inline int mmc_set_lowest_voltage(struct mmc *mmc, enum bus_mode mode,
1786 uint32_t allowed_mask)
1787 {
1788 return 0;
1789 }
1790 #endif
1791
1792 static const struct mode_width_tuning mmc_modes_by_pref[] = {
1793 #if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
1794 {
1795 .mode = MMC_HS_200,
1796 .widths = MMC_MODE_8BIT | MMC_MODE_4BIT,
1797 .tuning = MMC_CMD_SEND_TUNING_BLOCK_HS200
1798 },
1799 #endif
1800 {
1801 .mode = MMC_DDR_52,
1802 .widths = MMC_MODE_8BIT | MMC_MODE_4BIT,
1803 },
1804 {
1805 .mode = MMC_HS_52,
1806 .widths = MMC_MODE_8BIT | MMC_MODE_4BIT | MMC_MODE_1BIT,
1807 },
1808 {
1809 .mode = MMC_HS,
1810 .widths = MMC_MODE_8BIT | MMC_MODE_4BIT | MMC_MODE_1BIT,
1811 },
1812 {
1813 .mode = MMC_LEGACY,
1814 .widths = MMC_MODE_8BIT | MMC_MODE_4BIT | MMC_MODE_1BIT,
1815 }
1816 };
1817
1818 #define for_each_mmc_mode_by_pref(caps, mwt) \
1819 for (mwt = mmc_modes_by_pref;\
1820 mwt < mmc_modes_by_pref + ARRAY_SIZE(mmc_modes_by_pref);\
1821 mwt++) \
1822 if (caps & MMC_CAP(mwt->mode))
1823
1824 static const struct ext_csd_bus_width {
1825 uint cap;
1826 bool is_ddr;
1827 uint ext_csd_bits;
1828 } ext_csd_bus_width[] = {
1829 {MMC_MODE_8BIT, true, EXT_CSD_DDR_BUS_WIDTH_8},
1830 {MMC_MODE_4BIT, true, EXT_CSD_DDR_BUS_WIDTH_4},
1831 {MMC_MODE_8BIT, false, EXT_CSD_BUS_WIDTH_8},
1832 {MMC_MODE_4BIT, false, EXT_CSD_BUS_WIDTH_4},
1833 {MMC_MODE_1BIT, false, EXT_CSD_BUS_WIDTH_1},
1834 };
1835
1836 #define for_each_supported_width(caps, ddr, ecbv) \
1837 for (ecbv = ext_csd_bus_width;\
1838 ecbv < ext_csd_bus_width + ARRAY_SIZE(ext_csd_bus_width);\
1839 ecbv++) \
1840 if ((ddr == ecbv->is_ddr) && (caps & ecbv->cap))
1841
1842 static int mmc_select_mode_and_width(struct mmc *mmc, uint card_caps)
1843 {
1844 int err;
1845 const struct mode_width_tuning *mwt;
1846 const struct ext_csd_bus_width *ecbw;
1847
1848 #ifdef DEBUG
1849 mmc_dump_capabilities("mmc", card_caps);
1850 mmc_dump_capabilities("host", mmc->host_caps);
1851 #endif
1852
1853 /* Restrict card's capabilities by what the host can do */
1854 card_caps &= mmc->host_caps;
1855
1856 /* Only version 4 of MMC supports wider bus widths */
1857 if (mmc->version < MMC_VERSION_4)
1858 return 0;
1859
1860 if (!mmc->ext_csd) {
1861 debug("No ext_csd found!\n"); /* this should enver happen */
1862 return -ENOTSUPP;
1863 }
1864
1865 mmc_set_clock(mmc, mmc->legacy_speed, false);
1866
1867 for_each_mmc_mode_by_pref(card_caps, mwt) {
1868 for_each_supported_width(card_caps & mwt->widths,
1869 mmc_is_mode_ddr(mwt->mode), ecbw) {
1870 enum mmc_voltage old_voltage;
1871 debug("trying mode %s width %d (at %d MHz)\n",
1872 mmc_mode_name(mwt->mode),
1873 bus_width(ecbw->cap),
1874 mmc_mode2freq(mmc, mwt->mode) / 1000000);
1875 old_voltage = mmc->signal_voltage;
1876 err = mmc_set_lowest_voltage(mmc, mwt->mode,
1877 MMC_ALL_SIGNAL_VOLTAGE);
1878 if (err)
1879 continue;
1880
1881 /* configure the bus width (card + host) */
1882 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1883 EXT_CSD_BUS_WIDTH,
1884 ecbw->ext_csd_bits & ~EXT_CSD_DDR_FLAG);
1885 if (err)
1886 goto error;
1887 mmc_set_bus_width(mmc, bus_width(ecbw->cap));
1888
1889 /* configure the bus speed (card) */
1890 err = mmc_set_card_speed(mmc, mwt->mode);
1891 if (err)
1892 goto error;
1893
1894 /*
1895 * configure the bus width AND the ddr mode (card)
1896 * The host side will be taken care of in the next step
1897 */
1898 if (ecbw->ext_csd_bits & EXT_CSD_DDR_FLAG) {
1899 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1900 EXT_CSD_BUS_WIDTH,
1901 ecbw->ext_csd_bits);
1902 if (err)
1903 goto error;
1904 }
1905
1906 /* configure the bus mode (host) */
1907 mmc_select_mode(mmc, mwt->mode);
1908 mmc_set_clock(mmc, mmc->tran_speed, false);
1909 #ifdef MMC_SUPPORTS_TUNING
1910
1911 /* execute tuning if needed */
1912 if (mwt->tuning) {
1913 err = mmc_execute_tuning(mmc, mwt->tuning);
1914 if (err) {
1915 debug("tuning failed\n");
1916 goto error;
1917 }
1918 }
1919 #endif
1920
1921 /* do a transfer to check the configuration */
1922 err = mmc_read_and_compare_ext_csd(mmc);
1923 if (!err)
1924 return 0;
1925 error:
1926 mmc_set_signal_voltage(mmc, old_voltage);
1927 /* if an error occured, revert to a safer bus mode */
1928 mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1929 EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_1);
1930 mmc_select_mode(mmc, MMC_LEGACY);
1931 mmc_set_bus_width(mmc, 1);
1932 }
1933 }
1934
1935 pr_err("unable to select a mode\n");
1936
1937 return -ENOTSUPP;
1938 }
1939
1940 static int mmc_startup_v4(struct mmc *mmc)
1941 {
1942 int err, i;
1943 u64 capacity;
1944 bool has_parts = false;
1945 bool part_completed;
1946 static const u32 mmc_versions[] = {
1947 MMC_VERSION_4,
1948 MMC_VERSION_4_1,
1949 MMC_VERSION_4_2,
1950 MMC_VERSION_4_3,
1951 MMC_VERSION_4_41,
1952 MMC_VERSION_4_5,
1953 MMC_VERSION_5_0,
1954 MMC_VERSION_5_1
1955 };
1956
1957 ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
1958
1959 if (IS_SD(mmc) || (mmc->version < MMC_VERSION_4))
1960 return 0;
1961
1962 /* check ext_csd version and capacity */
1963 err = mmc_send_ext_csd(mmc, ext_csd);
1964 if (err)
1965 goto error;
1966
1967 /* store the ext csd for future reference */
1968 if (!mmc->ext_csd)
1969 mmc->ext_csd = malloc(MMC_MAX_BLOCK_LEN);
1970 if (!mmc->ext_csd)
1971 return -ENOMEM;
1972 memcpy(mmc->ext_csd, ext_csd, MMC_MAX_BLOCK_LEN);
1973
1974 if (ext_csd[EXT_CSD_REV] > ARRAY_SIZE(mmc_versions))
1975 return -EINVAL;
1976
1977 mmc->version = mmc_versions[ext_csd[EXT_CSD_REV]];
1978
1979 if (mmc->version >= MMC_VERSION_4_2) {
1980 /*
1981 * According to the JEDEC Standard, the value of
1982 * ext_csd's capacity is valid if the value is more
1983 * than 2GB
1984 */
1985 capacity = ext_csd[EXT_CSD_SEC_CNT] << 0
1986 | ext_csd[EXT_CSD_SEC_CNT + 1] << 8
1987 | ext_csd[EXT_CSD_SEC_CNT + 2] << 16
1988 | ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
1989 capacity *= MMC_MAX_BLOCK_LEN;
1990 if ((capacity >> 20) > 2 * 1024)
1991 mmc->capacity_user = capacity;
1992 }
1993
1994 /* The partition data may be non-zero but it is only
1995 * effective if PARTITION_SETTING_COMPLETED is set in
1996 * EXT_CSD, so ignore any data if this bit is not set,
1997 * except for enabling the high-capacity group size
1998 * definition (see below).
1999 */
2000 part_completed = !!(ext_csd[EXT_CSD_PARTITION_SETTING] &
2001 EXT_CSD_PARTITION_SETTING_COMPLETED);
2002
2003 /* store the partition info of emmc */
2004 mmc->part_support = ext_csd[EXT_CSD_PARTITIONING_SUPPORT];
2005 if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) ||
2006 ext_csd[EXT_CSD_BOOT_MULT])
2007 mmc->part_config = ext_csd[EXT_CSD_PART_CONF];
2008 if (part_completed &&
2009 (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & ENHNCD_SUPPORT))
2010 mmc->part_attr = ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE];
2011
2012 mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17;
2013
2014 mmc->capacity_rpmb = ext_csd[EXT_CSD_RPMB_MULT] << 17;
2015
2016 for (i = 0; i < 4; i++) {
2017 int idx = EXT_CSD_GP_SIZE_MULT + i * 3;
2018 uint mult = (ext_csd[idx + 2] << 16) +
2019 (ext_csd[idx + 1] << 8) + ext_csd[idx];
2020 if (mult)
2021 has_parts = true;
2022 if (!part_completed)
2023 continue;
2024 mmc->capacity_gp[i] = mult;
2025 mmc->capacity_gp[i] *=
2026 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
2027 mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
2028 mmc->capacity_gp[i] <<= 19;
2029 }
2030
2031 if (part_completed) {
2032 mmc->enh_user_size =
2033 (ext_csd[EXT_CSD_ENH_SIZE_MULT + 2] << 16) +
2034 (ext_csd[EXT_CSD_ENH_SIZE_MULT + 1] << 8) +
2035 ext_csd[EXT_CSD_ENH_SIZE_MULT];
2036 mmc->enh_user_size *= ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
2037 mmc->enh_user_size *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
2038 mmc->enh_user_size <<= 19;
2039 mmc->enh_user_start =
2040 (ext_csd[EXT_CSD_ENH_START_ADDR + 3] << 24) +
2041 (ext_csd[EXT_CSD_ENH_START_ADDR + 2] << 16) +
2042 (ext_csd[EXT_CSD_ENH_START_ADDR + 1] << 8) +
2043 ext_csd[EXT_CSD_ENH_START_ADDR];
2044 if (mmc->high_capacity)
2045 mmc->enh_user_start <<= 9;
2046 }
2047
2048 /*
2049 * Host needs to enable ERASE_GRP_DEF bit if device is
2050 * partitioned. This bit will be lost every time after a reset
2051 * or power off. This will affect erase size.
2052 */
2053 if (part_completed)
2054 has_parts = true;
2055 if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) &&
2056 (ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE] & PART_ENH_ATTRIB))
2057 has_parts = true;
2058 if (has_parts) {
2059 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
2060 EXT_CSD_ERASE_GROUP_DEF, 1);
2061
2062 if (err)
2063 goto error;
2064
2065 ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1;
2066 }
2067
2068 if (ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01) {
2069 #if CONFIG_IS_ENABLED(MMC_WRITE)
2070 /* Read out group size from ext_csd */
2071 mmc->erase_grp_size =
2072 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024;
2073 #endif
2074 /*
2075 * if high capacity and partition setting completed
2076 * SEC_COUNT is valid even if it is smaller than 2 GiB
2077 * JEDEC Standard JESD84-B45, 6.2.4
2078 */
2079 if (mmc->high_capacity && part_completed) {
2080 capacity = (ext_csd[EXT_CSD_SEC_CNT]) |
2081 (ext_csd[EXT_CSD_SEC_CNT + 1] << 8) |
2082 (ext_csd[EXT_CSD_SEC_CNT + 2] << 16) |
2083 (ext_csd[EXT_CSD_SEC_CNT + 3] << 24);
2084 capacity *= MMC_MAX_BLOCK_LEN;
2085 mmc->capacity_user = capacity;
2086 }
2087 }
2088 #if CONFIG_IS_ENABLED(MMC_WRITE)
2089 else {
2090 /* Calculate the group size from the csd value. */
2091 int erase_gsz, erase_gmul;
2092
2093 erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10;
2094 erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5;
2095 mmc->erase_grp_size = (erase_gsz + 1)
2096 * (erase_gmul + 1);
2097 }
2098 #endif
2099 mmc->hc_wp_grp_size = 1024
2100 * ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
2101 * ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
2102
2103 mmc->wr_rel_set = ext_csd[EXT_CSD_WR_REL_SET];
2104
2105 return 0;
2106 error:
2107 if (mmc->ext_csd) {
2108 free(mmc->ext_csd);
2109 mmc->ext_csd = NULL;
2110 }
2111 return err;
2112 }
2113
2114 static int mmc_startup(struct mmc *mmc)
2115 {
2116 int err, i;
2117 uint mult, freq;
2118 u64 cmult, csize;
2119 struct mmc_cmd cmd;
2120 struct blk_desc *bdesc;
2121
2122 #ifdef CONFIG_MMC_SPI_CRC_ON
2123 if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
2124 cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
2125 cmd.resp_type = MMC_RSP_R1;
2126 cmd.cmdarg = 1;
2127 err = mmc_send_cmd(mmc, &cmd, NULL);
2128 if (err)
2129 return err;
2130 }
2131 #endif
2132
2133 /* Put the Card in Identify Mode */
2134 cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
2135 MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
2136 cmd.resp_type = MMC_RSP_R2;
2137 cmd.cmdarg = 0;
2138
2139 err = mmc_send_cmd(mmc, &cmd, NULL);
2140
2141 #ifdef CONFIG_MMC_QUIRKS
2142 if (err && (mmc->quirks & MMC_QUIRK_RETRY_SEND_CID)) {
2143 int retries = 4;
2144 /*
2145 * It has been seen that SEND_CID may fail on the first
2146 * attempt, let's try a few more time
2147 */
2148 do {
2149 err = mmc_send_cmd(mmc, &cmd, NULL);
2150 if (!err)
2151 break;
2152 } while (retries--);
2153 }
2154 #endif
2155
2156 if (err)
2157 return err;
2158
2159 memcpy(mmc->cid, cmd.response, 16);
2160
2161 /*
2162 * For MMC cards, set the Relative Address.
2163 * For SD cards, get the Relatvie Address.
2164 * This also puts the cards into Standby State
2165 */
2166 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
2167 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
2168 cmd.cmdarg = mmc->rca << 16;
2169 cmd.resp_type = MMC_RSP_R6;
2170
2171 err = mmc_send_cmd(mmc, &cmd, NULL);
2172
2173 if (err)
2174 return err;
2175
2176 if (IS_SD(mmc))
2177 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
2178 }
2179
2180 /* Get the Card-Specific Data */
2181 cmd.cmdidx = MMC_CMD_SEND_CSD;
2182 cmd.resp_type = MMC_RSP_R2;
2183 cmd.cmdarg = mmc->rca << 16;
2184
2185 err = mmc_send_cmd(mmc, &cmd, NULL);
2186
2187 if (err)
2188 return err;
2189
2190 mmc->csd[0] = cmd.response[0];
2191 mmc->csd[1] = cmd.response[1];
2192 mmc->csd[2] = cmd.response[2];
2193 mmc->csd[3] = cmd.response[3];
2194
2195 if (mmc->version == MMC_VERSION_UNKNOWN) {
2196 int version = (cmd.response[0] >> 26) & 0xf;
2197
2198 switch (version) {
2199 case 0:
2200 mmc->version = MMC_VERSION_1_2;
2201 break;
2202 case 1:
2203 mmc->version = MMC_VERSION_1_4;
2204 break;
2205 case 2:
2206 mmc->version = MMC_VERSION_2_2;
2207 break;
2208 case 3:
2209 mmc->version = MMC_VERSION_3;
2210 break;
2211 case 4:
2212 mmc->version = MMC_VERSION_4;
2213 break;
2214 default:
2215 mmc->version = MMC_VERSION_1_2;
2216 break;
2217 }
2218 }
2219
2220 /* divide frequency by 10, since the mults are 10x bigger */
2221 freq = fbase[(cmd.response[0] & 0x7)];
2222 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
2223
2224 mmc->legacy_speed = freq * mult;
2225 mmc_select_mode(mmc, MMC_LEGACY);
2226
2227 mmc->dsr_imp = ((cmd.response[1] >> 12) & 0x1);
2228 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
2229 #if CONFIG_IS_ENABLED(MMC_WRITE)
2230
2231 if (IS_SD(mmc))
2232 mmc->write_bl_len = mmc->read_bl_len;
2233 else
2234 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
2235 #endif
2236
2237 if (mmc->high_capacity) {
2238 csize = (mmc->csd[1] & 0x3f) << 16
2239 | (mmc->csd[2] & 0xffff0000) >> 16;
2240 cmult = 8;
2241 } else {
2242 csize = (mmc->csd[1] & 0x3ff) << 2
2243 | (mmc->csd[2] & 0xc0000000) >> 30;
2244 cmult = (mmc->csd[2] & 0x00038000) >> 15;
2245 }
2246
2247 mmc->capacity_user = (csize + 1) << (cmult + 2);
2248 mmc->capacity_user *= mmc->read_bl_len;
2249 mmc->capacity_boot = 0;
2250 mmc->capacity_rpmb = 0;
2251 for (i = 0; i < 4; i++)
2252 mmc->capacity_gp[i] = 0;
2253
2254 if (mmc->read_bl_len > MMC_MAX_BLOCK_LEN)
2255 mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
2256
2257 #if CONFIG_IS_ENABLED(MMC_WRITE)
2258 if (mmc->write_bl_len > MMC_MAX_BLOCK_LEN)
2259 mmc->write_bl_len = MMC_MAX_BLOCK_LEN;
2260 #endif
2261
2262 if ((mmc->dsr_imp) && (0xffffffff != mmc->dsr)) {
2263 cmd.cmdidx = MMC_CMD_SET_DSR;
2264 cmd.cmdarg = (mmc->dsr & 0xffff) << 16;
2265 cmd.resp_type = MMC_RSP_NONE;
2266 if (mmc_send_cmd(mmc, &cmd, NULL))
2267 pr_warn("MMC: SET_DSR failed\n");
2268 }
2269
2270 /* Select the card, and put it into Transfer Mode */
2271 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
2272 cmd.cmdidx = MMC_CMD_SELECT_CARD;
2273 cmd.resp_type = MMC_RSP_R1;
2274 cmd.cmdarg = mmc->rca << 16;
2275 err = mmc_send_cmd(mmc, &cmd, NULL);
2276
2277 if (err)
2278 return err;
2279 }
2280
2281 /*
2282 * For SD, its erase group is always one sector
2283 */
2284 #if CONFIG_IS_ENABLED(MMC_WRITE)
2285 mmc->erase_grp_size = 1;
2286 #endif
2287 mmc->part_config = MMCPART_NOAVAILABLE;
2288
2289 err = mmc_startup_v4(mmc);
2290 if (err)
2291 return err;
2292
2293 err = mmc_set_capacity(mmc, mmc_get_blk_desc(mmc)->hwpart);
2294 if (err)
2295 return err;
2296
2297 if (IS_SD(mmc)) {
2298 err = sd_get_capabilities(mmc);
2299 if (err)
2300 return err;
2301 err = sd_select_mode_and_width(mmc, mmc->card_caps);
2302 } else {
2303 err = mmc_get_capabilities(mmc);
2304 if (err)
2305 return err;
2306 mmc_select_mode_and_width(mmc, mmc->card_caps);
2307 }
2308
2309 if (err)
2310 return err;
2311
2312 mmc->best_mode = mmc->selected_mode;
2313
2314 /* Fix the block length for DDR mode */
2315 if (mmc->ddr_mode) {
2316 mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
2317 #if CONFIG_IS_ENABLED(MMC_WRITE)
2318 mmc->write_bl_len = MMC_MAX_BLOCK_LEN;
2319 #endif
2320 }
2321
2322 /* fill in device description */
2323 bdesc = mmc_get_blk_desc(mmc);
2324 bdesc->lun = 0;
2325 bdesc->hwpart = 0;
2326 bdesc->type = 0;
2327 bdesc->blksz = mmc->read_bl_len;
2328 bdesc->log2blksz = LOG2(bdesc->blksz);
2329 bdesc->lba = lldiv(mmc->capacity, mmc->read_bl_len);
2330 #if !defined(CONFIG_SPL_BUILD) || \
2331 (defined(CONFIG_SPL_LIBCOMMON_SUPPORT) && \
2332 !defined(CONFIG_USE_TINY_PRINTF))
2333 sprintf(bdesc->vendor, "Man %06x Snr %04x%04x",
2334 mmc->cid[0] >> 24, (mmc->cid[2] & 0xffff),
2335 (mmc->cid[3] >> 16) & 0xffff);
2336 sprintf(bdesc->product, "%c%c%c%c%c%c", mmc->cid[0] & 0xff,
2337 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
2338 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff,
2339 (mmc->cid[2] >> 24) & 0xff);
2340 sprintf(bdesc->revision, "%d.%d", (mmc->cid[2] >> 20) & 0xf,
2341 (mmc->cid[2] >> 16) & 0xf);
2342 #else
2343 bdesc->vendor[0] = 0;
2344 bdesc->product[0] = 0;
2345 bdesc->revision[0] = 0;
2346 #endif
2347 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBDISK_SUPPORT)
2348 part_init(bdesc);
2349 #endif
2350
2351 return 0;
2352 }
2353
2354 static int mmc_send_if_cond(struct mmc *mmc)
2355 {
2356 struct mmc_cmd cmd;
2357 int err;
2358
2359 cmd.cmdidx = SD_CMD_SEND_IF_COND;
2360 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
2361 cmd.cmdarg = ((mmc->cfg->voltages & 0xff8000) != 0) << 8 | 0xaa;
2362 cmd.resp_type = MMC_RSP_R7;
2363
2364 err = mmc_send_cmd(mmc, &cmd, NULL);
2365
2366 if (err)
2367 return err;
2368
2369 if ((cmd.response[0] & 0xff) != 0xaa)
2370 return -EOPNOTSUPP;
2371 else
2372 mmc->version = SD_VERSION_2;
2373
2374 return 0;
2375 }
2376
2377 #if !CONFIG_IS_ENABLED(DM_MMC)
2378 /* board-specific MMC power initializations. */
2379 __weak void board_mmc_power_init(void)
2380 {
2381 }
2382 #endif
2383
2384 static int mmc_power_init(struct mmc *mmc)
2385 {
2386 #if CONFIG_IS_ENABLED(DM_MMC)
2387 #if CONFIG_IS_ENABLED(DM_REGULATOR)
2388 int ret;
2389
2390 ret = device_get_supply_regulator(mmc->dev, "vmmc-supply",
2391 &mmc->vmmc_supply);
2392 if (ret)
2393 debug("%s: No vmmc supply\n", mmc->dev->name);
2394
2395 ret = device_get_supply_regulator(mmc->dev, "vqmmc-supply",
2396 &mmc->vqmmc_supply);
2397 if (ret)
2398 debug("%s: No vqmmc supply\n", mmc->dev->name);
2399 #endif
2400 #else /* !CONFIG_DM_MMC */
2401 /*
2402 * Driver model should use a regulator, as above, rather than calling
2403 * out to board code.
2404 */
2405 board_mmc_power_init();
2406 #endif
2407 return 0;
2408 }
2409
2410 /*
2411 * put the host in the initial state:
2412 * - turn on Vdd (card power supply)
2413 * - configure the bus width and clock to minimal values
2414 */
2415 static void mmc_set_initial_state(struct mmc *mmc)
2416 {
2417 int err;
2418
2419 /* First try to set 3.3V. If it fails set to 1.8V */
2420 err = mmc_set_signal_voltage(mmc, MMC_SIGNAL_VOLTAGE_330);
2421 if (err != 0)
2422 err = mmc_set_signal_voltage(mmc, MMC_SIGNAL_VOLTAGE_180);
2423 if (err != 0)
2424 pr_warn("mmc: failed to set signal voltage\n");
2425
2426 mmc_select_mode(mmc, MMC_LEGACY);
2427 mmc_set_bus_width(mmc, 1);
2428 mmc_set_clock(mmc, 0, false);
2429 }
2430
2431 static int mmc_power_on(struct mmc *mmc)
2432 {
2433 #if CONFIG_IS_ENABLED(DM_MMC) && CONFIG_IS_ENABLED(DM_REGULATOR)
2434 if (mmc->vmmc_supply) {
2435 int ret = regulator_set_enable(mmc->vmmc_supply, true);
2436
2437 if (ret) {
2438 puts("Error enabling VMMC supply\n");
2439 return ret;
2440 }
2441 }
2442 #endif
2443 return 0;
2444 }
2445
2446 static int mmc_power_off(struct mmc *mmc)
2447 {
2448 mmc_set_clock(mmc, 1, true);
2449 #if CONFIG_IS_ENABLED(DM_MMC) && CONFIG_IS_ENABLED(DM_REGULATOR)
2450 if (mmc->vmmc_supply) {
2451 int ret = regulator_set_enable(mmc->vmmc_supply, false);
2452
2453 if (ret) {
2454 debug("Error disabling VMMC supply\n");
2455 return ret;
2456 }
2457 }
2458 #endif
2459 return 0;
2460 }
2461
2462 static int mmc_power_cycle(struct mmc *mmc)
2463 {
2464 int ret;
2465
2466 ret = mmc_power_off(mmc);
2467 if (ret)
2468 return ret;
2469 /*
2470 * SD spec recommends at least 1ms of delay. Let's wait for 2ms
2471 * to be on the safer side.
2472 */
2473 udelay(2000);
2474 return mmc_power_on(mmc);
2475 }
2476
2477 int mmc_start_init(struct mmc *mmc)
2478 {
2479 bool no_card;
2480 bool uhs_en = supports_uhs(mmc->cfg->host_caps);
2481 int err;
2482
2483 /*
2484 * all hosts are capable of 1 bit bus-width and able to use the legacy
2485 * timings.
2486 */
2487 mmc->host_caps = mmc->cfg->host_caps | MMC_CAP(SD_LEGACY) |
2488 MMC_CAP(MMC_LEGACY) | MMC_MODE_1BIT;
2489
2490 /* we pretend there's no card when init is NULL */
2491 no_card = mmc_getcd(mmc) == 0;
2492 #if !CONFIG_IS_ENABLED(DM_MMC)
2493 no_card = no_card || (mmc->cfg->ops->init == NULL);
2494 #endif
2495 if (no_card) {
2496 mmc->has_init = 0;
2497 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
2498 printf("MMC: no card present\n");
2499 #endif
2500 return -ENOMEDIUM;
2501 }
2502
2503 if (mmc->has_init)
2504 return 0;
2505
2506 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
2507 mmc_adapter_card_type_ident();
2508 #endif
2509 err = mmc_power_init(mmc);
2510 if (err)
2511 return err;
2512
2513 #ifdef CONFIG_MMC_QUIRKS
2514 mmc->quirks = MMC_QUIRK_RETRY_SET_BLOCKLEN |
2515 MMC_QUIRK_RETRY_SEND_CID;
2516 #endif
2517
2518 err = mmc_power_cycle(mmc);
2519 if (err) {
2520 /*
2521 * if power cycling is not supported, we should not try
2522 * to use the UHS modes, because we wouldn't be able to
2523 * recover from an error during the UHS initialization.
2524 */
2525 debug("Unable to do a full power cycle. Disabling the UHS modes for safety\n");
2526 uhs_en = false;
2527 mmc->host_caps &= ~UHS_CAPS;
2528 err = mmc_power_on(mmc);
2529 }
2530 if (err)
2531 return err;
2532
2533 #if CONFIG_IS_ENABLED(DM_MMC)
2534 /* The device has already been probed ready for use */
2535 #else
2536 /* made sure it's not NULL earlier */
2537 err = mmc->cfg->ops->init(mmc);
2538 if (err)
2539 return err;
2540 #endif
2541 mmc->ddr_mode = 0;
2542
2543 retry:
2544 mmc_set_initial_state(mmc);
2545 mmc_send_init_stream(mmc);
2546
2547 /* Reset the Card */
2548 err = mmc_go_idle(mmc);
2549
2550 if (err)
2551 return err;
2552
2553 /* The internal partition reset to user partition(0) at every CMD0*/
2554 mmc_get_blk_desc(mmc)->hwpart = 0;
2555
2556 /* Test for SD version 2 */
2557 err = mmc_send_if_cond(mmc);
2558
2559 /* Now try to get the SD card's operating condition */
2560 err = sd_send_op_cond(mmc, uhs_en);
2561 if (err && uhs_en) {
2562 uhs_en = false;
2563 mmc_power_cycle(mmc);
2564 goto retry;
2565 }
2566
2567 /* If the command timed out, we check for an MMC card */
2568 if (err == -ETIMEDOUT) {
2569 err = mmc_send_op_cond(mmc);
2570
2571 if (err) {
2572 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
2573 pr_err("Card did not respond to voltage select!\n");
2574 #endif
2575 return -EOPNOTSUPP;
2576 }
2577 }
2578
2579 if (!err)
2580 mmc->init_in_progress = 1;
2581
2582 return err;
2583 }
2584
2585 static int mmc_complete_init(struct mmc *mmc)
2586 {
2587 int err = 0;
2588
2589 mmc->init_in_progress = 0;
2590 if (mmc->op_cond_pending)
2591 err = mmc_complete_op_cond(mmc);
2592
2593 if (!err)
2594 err = mmc_startup(mmc);
2595 if (err)
2596 mmc->has_init = 0;
2597 else
2598 mmc->has_init = 1;
2599 return err;
2600 }
2601
2602 int mmc_init(struct mmc *mmc)
2603 {
2604 int err = 0;
2605 __maybe_unused unsigned start;
2606 #if CONFIG_IS_ENABLED(DM_MMC)
2607 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(mmc->dev);
2608
2609 upriv->mmc = mmc;
2610 #endif
2611 if (mmc->has_init)
2612 return 0;
2613
2614 start = get_timer(0);
2615
2616 if (!mmc->init_in_progress)
2617 err = mmc_start_init(mmc);
2618
2619 if (!err)
2620 err = mmc_complete_init(mmc);
2621 if (err)
2622 printf("%s: %d, time %lu\n", __func__, err, get_timer(start));
2623
2624 return err;
2625 }
2626
2627 int mmc_set_dsr(struct mmc *mmc, u16 val)
2628 {
2629 mmc->dsr = val;
2630 return 0;
2631 }
2632
2633 /* CPU-specific MMC initializations */
2634 __weak int cpu_mmc_init(bd_t *bis)
2635 {
2636 return -1;
2637 }
2638
2639 /* board-specific MMC initializations. */
2640 __weak int board_mmc_init(bd_t *bis)
2641 {
2642 return -1;
2643 }
2644
2645 void mmc_set_preinit(struct mmc *mmc, int preinit)
2646 {
2647 mmc->preinit = preinit;
2648 }
2649
2650 #if CONFIG_IS_ENABLED(DM_MMC) && defined(CONFIG_SPL_BUILD)
2651 static int mmc_probe(bd_t *bis)
2652 {
2653 return 0;
2654 }
2655 #elif CONFIG_IS_ENABLED(DM_MMC)
2656 static int mmc_probe(bd_t *bis)
2657 {
2658 int ret, i;
2659 struct uclass *uc;
2660 struct udevice *dev;
2661
2662 ret = uclass_get(UCLASS_MMC, &uc);
2663 if (ret)
2664 return ret;
2665
2666 /*
2667 * Try to add them in sequence order. Really with driver model we
2668 * should allow holes, but the current MMC list does not allow that.
2669 * So if we request 0, 1, 3 we will get 0, 1, 2.
2670 */
2671 for (i = 0; ; i++) {
2672 ret = uclass_get_device_by_seq(UCLASS_MMC, i, &dev);
2673 if (ret == -ENODEV)
2674 break;
2675 }
2676 uclass_foreach_dev(dev, uc) {
2677 ret = device_probe(dev);
2678 if (ret)
2679 pr_err("%s - probe failed: %d\n", dev->name, ret);
2680 }
2681
2682 return 0;
2683 }
2684 #else
2685 static int mmc_probe(bd_t *bis)
2686 {
2687 if (board_mmc_init(bis) < 0)
2688 cpu_mmc_init(bis);
2689
2690 return 0;
2691 }
2692 #endif
2693
2694 int mmc_initialize(bd_t *bis)
2695 {
2696 static int initialized = 0;
2697 int ret;
2698 if (initialized) /* Avoid initializing mmc multiple times */
2699 return 0;
2700 initialized = 1;
2701
2702 #if !CONFIG_IS_ENABLED(BLK)
2703 #if !CONFIG_IS_ENABLED(MMC_TINY)
2704 mmc_list_init();
2705 #endif
2706 #endif
2707 ret = mmc_probe(bis);
2708 if (ret)
2709 return ret;
2710
2711 #ifndef CONFIG_SPL_BUILD
2712 print_mmc_devices(',');
2713 #endif
2714
2715 mmc_do_preinit();
2716 return 0;
2717 }
2718
2719 #ifdef CONFIG_CMD_BKOPS_ENABLE
2720 int mmc_set_bkops_enable(struct mmc *mmc)
2721 {
2722 int err;
2723 ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
2724
2725 err = mmc_send_ext_csd(mmc, ext_csd);
2726 if (err) {
2727 puts("Could not get ext_csd register values\n");
2728 return err;
2729 }
2730
2731 if (!(ext_csd[EXT_CSD_BKOPS_SUPPORT] & 0x1)) {
2732 puts("Background operations not supported on device\n");
2733 return -EMEDIUMTYPE;
2734 }
2735
2736 if (ext_csd[EXT_CSD_BKOPS_EN] & 0x1) {
2737 puts("Background operations already enabled\n");
2738 return 0;
2739 }
2740
2741 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BKOPS_EN, 1);
2742 if (err) {
2743 puts("Failed to enable manual background operations\n");
2744 return err;
2745 }
2746
2747 puts("Enabled manual background operations\n");
2748
2749 return 0;
2750 }
2751 #endif
"Das U-Boot" Source Tree