Loading...
1/*
2 * linux/drivers/mmc/core/mmc_ops.h
3 *
4 * Copyright 2006-2007 Pierre Ossman
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
10 */
11
12#include <linux/slab.h>
13#include <linux/export.h>
14#include <linux/types.h>
15#include <linux/scatterlist.h>
16
17#include <linux/mmc/host.h>
18#include <linux/mmc/card.h>
19#include <linux/mmc/mmc.h>
20
21#include "core.h"
22#include "mmc_ops.h"
23
24#define MMC_OPS_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
25
26static inline int __mmc_send_status(struct mmc_card *card, u32 *status,
27 bool ignore_crc)
28{
29 int err;
30 struct mmc_command cmd = {0};
31
32 BUG_ON(!card);
33 BUG_ON(!card->host);
34
35 cmd.opcode = MMC_SEND_STATUS;
36 if (!mmc_host_is_spi(card->host))
37 cmd.arg = card->rca << 16;
38 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
39 if (ignore_crc)
40 cmd.flags &= ~MMC_RSP_CRC;
41
42 err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
43 if (err)
44 return err;
45
46 /* NOTE: callers are required to understand the difference
47 * between "native" and SPI format status words!
48 */
49 if (status)
50 *status = cmd.resp[0];
51
52 return 0;
53}
54
55int mmc_send_status(struct mmc_card *card, u32 *status)
56{
57 return __mmc_send_status(card, status, false);
58}
59
60static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
61{
62 int err;
63 struct mmc_command cmd = {0};
64
65 BUG_ON(!host);
66
67 cmd.opcode = MMC_SELECT_CARD;
68
69 if (card) {
70 cmd.arg = card->rca << 16;
71 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
72 } else {
73 cmd.arg = 0;
74 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
75 }
76
77 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
78 if (err)
79 return err;
80
81 return 0;
82}
83
84int mmc_select_card(struct mmc_card *card)
85{
86 BUG_ON(!card);
87
88 return _mmc_select_card(card->host, card);
89}
90
91int mmc_deselect_cards(struct mmc_host *host)
92{
93 return _mmc_select_card(host, NULL);
94}
95
96int mmc_go_idle(struct mmc_host *host)
97{
98 int err;
99 struct mmc_command cmd = {0};
100
101 /*
102 * Non-SPI hosts need to prevent chipselect going active during
103 * GO_IDLE; that would put chips into SPI mode. Remind them of
104 * that in case of hardware that won't pull up DAT3/nCS otherwise.
105 *
106 * SPI hosts ignore ios.chip_select; it's managed according to
107 * rules that must accommodate non-MMC slaves which this layer
108 * won't even know about.
109 */
110 if (!mmc_host_is_spi(host)) {
111 mmc_set_chip_select(host, MMC_CS_HIGH);
112 mmc_delay(1);
113 }
114
115 cmd.opcode = MMC_GO_IDLE_STATE;
116 cmd.arg = 0;
117 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
118
119 err = mmc_wait_for_cmd(host, &cmd, 0);
120
121 mmc_delay(1);
122
123 if (!mmc_host_is_spi(host)) {
124 mmc_set_chip_select(host, MMC_CS_DONTCARE);
125 mmc_delay(1);
126 }
127
128 host->use_spi_crc = 0;
129
130 return err;
131}
132
133int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
134{
135 struct mmc_command cmd = {0};
136 int i, err = 0;
137
138 BUG_ON(!host);
139
140 cmd.opcode = MMC_SEND_OP_COND;
141 cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
142 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
143
144 for (i = 100; i; i--) {
145 err = mmc_wait_for_cmd(host, &cmd, 0);
146 if (err)
147 break;
148
149 /* if we're just probing, do a single pass */
150 if (ocr == 0)
151 break;
152
153 /* otherwise wait until reset completes */
154 if (mmc_host_is_spi(host)) {
155 if (!(cmd.resp[0] & R1_SPI_IDLE))
156 break;
157 } else {
158 if (cmd.resp[0] & MMC_CARD_BUSY)
159 break;
160 }
161
162 err = -ETIMEDOUT;
163
164 mmc_delay(10);
165 }
166
167 if (rocr && !mmc_host_is_spi(host))
168 *rocr = cmd.resp[0];
169
170 return err;
171}
172
173int mmc_all_send_cid(struct mmc_host *host, u32 *cid)
174{
175 int err;
176 struct mmc_command cmd = {0};
177
178 BUG_ON(!host);
179 BUG_ON(!cid);
180
181 cmd.opcode = MMC_ALL_SEND_CID;
182 cmd.arg = 0;
183 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
184
185 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
186 if (err)
187 return err;
188
189 memcpy(cid, cmd.resp, sizeof(u32) * 4);
190
191 return 0;
192}
193
194int mmc_set_relative_addr(struct mmc_card *card)
195{
196 int err;
197 struct mmc_command cmd = {0};
198
199 BUG_ON(!card);
200 BUG_ON(!card->host);
201
202 cmd.opcode = MMC_SET_RELATIVE_ADDR;
203 cmd.arg = card->rca << 16;
204 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
205
206 err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
207 if (err)
208 return err;
209
210 return 0;
211}
212
213static int
214mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
215{
216 int err;
217 struct mmc_command cmd = {0};
218
219 BUG_ON(!host);
220 BUG_ON(!cxd);
221
222 cmd.opcode = opcode;
223 cmd.arg = arg;
224 cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
225
226 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
227 if (err)
228 return err;
229
230 memcpy(cxd, cmd.resp, sizeof(u32) * 4);
231
232 return 0;
233}
234
235/*
236 * NOTE: void *buf, caller for the buf is required to use DMA-capable
237 * buffer or on-stack buffer (with some overhead in callee).
238 */
239static int
240mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
241 u32 opcode, void *buf, unsigned len)
242{
243 struct mmc_request mrq = {NULL};
244 struct mmc_command cmd = {0};
245 struct mmc_data data = {0};
246 struct scatterlist sg;
247 void *data_buf;
248 int is_on_stack;
249
250 is_on_stack = object_is_on_stack(buf);
251 if (is_on_stack) {
252 /*
253 * dma onto stack is unsafe/nonportable, but callers to this
254 * routine normally provide temporary on-stack buffers ...
255 */
256 data_buf = kmalloc(len, GFP_KERNEL);
257 if (!data_buf)
258 return -ENOMEM;
259 } else
260 data_buf = buf;
261
262 mrq.cmd = &cmd;
263 mrq.data = &data;
264
265 cmd.opcode = opcode;
266 cmd.arg = 0;
267
268 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
269 * rely on callers to never use this with "native" calls for reading
270 * CSD or CID. Native versions of those commands use the R2 type,
271 * not R1 plus a data block.
272 */
273 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
274
275 data.blksz = len;
276 data.blocks = 1;
277 data.flags = MMC_DATA_READ;
278 data.sg = &sg;
279 data.sg_len = 1;
280
281 sg_init_one(&sg, data_buf, len);
282
283 if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) {
284 /*
285 * The spec states that CSR and CID accesses have a timeout
286 * of 64 clock cycles.
287 */
288 data.timeout_ns = 0;
289 data.timeout_clks = 64;
290 } else
291 mmc_set_data_timeout(&data, card);
292
293 mmc_wait_for_req(host, &mrq);
294
295 if (is_on_stack) {
296 memcpy(buf, data_buf, len);
297 kfree(data_buf);
298 }
299
300 if (cmd.error)
301 return cmd.error;
302 if (data.error)
303 return data.error;
304
305 return 0;
306}
307
308int mmc_send_csd(struct mmc_card *card, u32 *csd)
309{
310 int ret, i;
311 u32 *csd_tmp;
312
313 if (!mmc_host_is_spi(card->host))
314 return mmc_send_cxd_native(card->host, card->rca << 16,
315 csd, MMC_SEND_CSD);
316
317 csd_tmp = kmalloc(16, GFP_KERNEL);
318 if (!csd_tmp)
319 return -ENOMEM;
320
321 ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd_tmp, 16);
322 if (ret)
323 goto err;
324
325 for (i = 0;i < 4;i++)
326 csd[i] = be32_to_cpu(csd_tmp[i]);
327
328err:
329 kfree(csd_tmp);
330 return ret;
331}
332
333int mmc_send_cid(struct mmc_host *host, u32 *cid)
334{
335 int ret, i;
336 u32 *cid_tmp;
337
338 if (!mmc_host_is_spi(host)) {
339 if (!host->card)
340 return -EINVAL;
341 return mmc_send_cxd_native(host, host->card->rca << 16,
342 cid, MMC_SEND_CID);
343 }
344
345 cid_tmp = kmalloc(16, GFP_KERNEL);
346 if (!cid_tmp)
347 return -ENOMEM;
348
349 ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid_tmp, 16);
350 if (ret)
351 goto err;
352
353 for (i = 0;i < 4;i++)
354 cid[i] = be32_to_cpu(cid_tmp[i]);
355
356err:
357 kfree(cid_tmp);
358 return ret;
359}
360
361int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd)
362{
363 return mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD,
364 ext_csd, 512);
365}
366EXPORT_SYMBOL_GPL(mmc_send_ext_csd);
367
368int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
369{
370 struct mmc_command cmd = {0};
371 int err;
372
373 cmd.opcode = MMC_SPI_READ_OCR;
374 cmd.arg = highcap ? (1 << 30) : 0;
375 cmd.flags = MMC_RSP_SPI_R3;
376
377 err = mmc_wait_for_cmd(host, &cmd, 0);
378
379 *ocrp = cmd.resp[1];
380 return err;
381}
382
383int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
384{
385 struct mmc_command cmd = {0};
386 int err;
387
388 cmd.opcode = MMC_SPI_CRC_ON_OFF;
389 cmd.flags = MMC_RSP_SPI_R1;
390 cmd.arg = use_crc;
391
392 err = mmc_wait_for_cmd(host, &cmd, 0);
393 if (!err)
394 host->use_spi_crc = use_crc;
395 return err;
396}
397
398/**
399 * __mmc_switch - modify EXT_CSD register
400 * @card: the MMC card associated with the data transfer
401 * @set: cmd set values
402 * @index: EXT_CSD register index
403 * @value: value to program into EXT_CSD register
404 * @timeout_ms: timeout (ms) for operation performed by register write,
405 * timeout of zero implies maximum possible timeout
406 * @use_busy_signal: use the busy signal as response type
407 * @send_status: send status cmd to poll for busy
408 * @ignore_crc: ignore CRC errors when sending status cmd to poll for busy
409 *
410 * Modifies the EXT_CSD register for selected card.
411 */
412int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
413 unsigned int timeout_ms, bool use_busy_signal, bool send_status,
414 bool ignore_crc)
415{
416 struct mmc_host *host = card->host;
417 int err;
418 struct mmc_command cmd = {0};
419 unsigned long timeout;
420 u32 status = 0;
421 bool use_r1b_resp = use_busy_signal;
422
423 /*
424 * If the cmd timeout and the max_busy_timeout of the host are both
425 * specified, let's validate them. A failure means we need to prevent
426 * the host from doing hw busy detection, which is done by converting
427 * to a R1 response instead of a R1B.
428 */
429 if (timeout_ms && host->max_busy_timeout &&
430 (timeout_ms > host->max_busy_timeout))
431 use_r1b_resp = false;
432
433 cmd.opcode = MMC_SWITCH;
434 cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
435 (index << 16) |
436 (value << 8) |
437 set;
438 cmd.flags = MMC_CMD_AC;
439 if (use_r1b_resp) {
440 cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B;
441 /*
442 * A busy_timeout of zero means the host can decide to use
443 * whatever value it finds suitable.
444 */
445 cmd.busy_timeout = timeout_ms;
446 } else {
447 cmd.flags |= MMC_RSP_SPI_R1 | MMC_RSP_R1;
448 }
449
450 if (index == EXT_CSD_SANITIZE_START)
451 cmd.sanitize_busy = true;
452
453 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
454 if (err)
455 return err;
456
457 /* No need to check card status in case of unblocking command */
458 if (!use_busy_signal)
459 return 0;
460
461 /*
462 * CRC errors shall only be ignored in cases were CMD13 is used to poll
463 * to detect busy completion.
464 */
465 if ((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp)
466 ignore_crc = false;
467
468 /* We have an unspecified cmd timeout, use the fallback value. */
469 if (!timeout_ms)
470 timeout_ms = MMC_OPS_TIMEOUT_MS;
471
472 /* Must check status to be sure of no errors. */
473 timeout = jiffies + msecs_to_jiffies(timeout_ms);
474 do {
475 if (send_status) {
476 err = __mmc_send_status(card, &status, ignore_crc);
477 if (err)
478 return err;
479 }
480 if ((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp)
481 break;
482 if (mmc_host_is_spi(host))
483 break;
484
485 /*
486 * We are not allowed to issue a status command and the host
487 * does'nt support MMC_CAP_WAIT_WHILE_BUSY, then we can only
488 * rely on waiting for the stated timeout to be sufficient.
489 */
490 if (!send_status) {
491 mmc_delay(timeout_ms);
492 return 0;
493 }
494
495 /* Timeout if the device never leaves the program state. */
496 if (time_after(jiffies, timeout)) {
497 pr_err("%s: Card stuck in programming state! %s\n",
498 mmc_hostname(host), __func__);
499 return -ETIMEDOUT;
500 }
501 } while (R1_CURRENT_STATE(status) == R1_STATE_PRG);
502
503 if (mmc_host_is_spi(host)) {
504 if (status & R1_SPI_ILLEGAL_COMMAND)
505 return -EBADMSG;
506 } else {
507 if (status & 0xFDFFA000)
508 pr_warn("%s: unexpected status %#x after switch\n",
509 mmc_hostname(host), status);
510 if (status & R1_SWITCH_ERROR)
511 return -EBADMSG;
512 }
513
514 return 0;
515}
516EXPORT_SYMBOL_GPL(__mmc_switch);
517
518int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
519 unsigned int timeout_ms)
520{
521 return __mmc_switch(card, set, index, value, timeout_ms, true, true,
522 false);
523}
524EXPORT_SYMBOL_GPL(mmc_switch);
525
526static int
527mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
528 u8 len)
529{
530 struct mmc_request mrq = {NULL};
531 struct mmc_command cmd = {0};
532 struct mmc_data data = {0};
533 struct scatterlist sg;
534 u8 *data_buf;
535 u8 *test_buf;
536 int i, err;
537 static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 };
538 static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 };
539
540 /* dma onto stack is unsafe/nonportable, but callers to this
541 * routine normally provide temporary on-stack buffers ...
542 */
543 data_buf = kmalloc(len, GFP_KERNEL);
544 if (!data_buf)
545 return -ENOMEM;
546
547 if (len == 8)
548 test_buf = testdata_8bit;
549 else if (len == 4)
550 test_buf = testdata_4bit;
551 else {
552 pr_err("%s: Invalid bus_width %d\n",
553 mmc_hostname(host), len);
554 kfree(data_buf);
555 return -EINVAL;
556 }
557
558 if (opcode == MMC_BUS_TEST_W)
559 memcpy(data_buf, test_buf, len);
560
561 mrq.cmd = &cmd;
562 mrq.data = &data;
563 cmd.opcode = opcode;
564 cmd.arg = 0;
565
566 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
567 * rely on callers to never use this with "native" calls for reading
568 * CSD or CID. Native versions of those commands use the R2 type,
569 * not R1 plus a data block.
570 */
571 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
572
573 data.blksz = len;
574 data.blocks = 1;
575 if (opcode == MMC_BUS_TEST_R)
576 data.flags = MMC_DATA_READ;
577 else
578 data.flags = MMC_DATA_WRITE;
579
580 data.sg = &sg;
581 data.sg_len = 1;
582 mmc_set_data_timeout(&data, card);
583 sg_init_one(&sg, data_buf, len);
584 mmc_wait_for_req(host, &mrq);
585 err = 0;
586 if (opcode == MMC_BUS_TEST_R) {
587 for (i = 0; i < len / 4; i++)
588 if ((test_buf[i] ^ data_buf[i]) != 0xff) {
589 err = -EIO;
590 break;
591 }
592 }
593 kfree(data_buf);
594
595 if (cmd.error)
596 return cmd.error;
597 if (data.error)
598 return data.error;
599
600 return err;
601}
602
603int mmc_bus_test(struct mmc_card *card, u8 bus_width)
604{
605 int err, width;
606
607 if (bus_width == MMC_BUS_WIDTH_8)
608 width = 8;
609 else if (bus_width == MMC_BUS_WIDTH_4)
610 width = 4;
611 else if (bus_width == MMC_BUS_WIDTH_1)
612 return 0; /* no need for test */
613 else
614 return -EINVAL;
615
616 /*
617 * Ignore errors from BUS_TEST_W. BUS_TEST_R will fail if there
618 * is a problem. This improves chances that the test will work.
619 */
620 mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width);
621 err = mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width);
622 return err;
623}
624
625int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
626{
627 struct mmc_command cmd = {0};
628 unsigned int opcode;
629 int err;
630
631 if (!card->ext_csd.hpi) {
632 pr_warning("%s: Card didn't support HPI command\n",
633 mmc_hostname(card->host));
634 return -EINVAL;
635 }
636
637 opcode = card->ext_csd.hpi_cmd;
638 if (opcode == MMC_STOP_TRANSMISSION)
639 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
640 else if (opcode == MMC_SEND_STATUS)
641 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
642
643 cmd.opcode = opcode;
644 cmd.arg = card->rca << 16 | 1;
645
646 err = mmc_wait_for_cmd(card->host, &cmd, 0);
647 if (err) {
648 pr_warn("%s: error %d interrupting operation. "
649 "HPI command response %#x\n", mmc_hostname(card->host),
650 err, cmd.resp[0]);
651 return err;
652 }
653 if (status)
654 *status = cmd.resp[0];
655
656 return 0;
657}
1/*
2 * linux/drivers/mmc/core/mmc_ops.h
3 *
4 * Copyright 2006-2007 Pierre Ossman
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
10 */
11
12#include <linux/slab.h>
13#include <linux/export.h>
14#include <linux/types.h>
15#include <linux/scatterlist.h>
16
17#include <linux/mmc/host.h>
18#include <linux/mmc/card.h>
19#include <linux/mmc/mmc.h>
20
21#include "core.h"
22#include "host.h"
23#include "mmc_ops.h"
24
25#define MMC_OPS_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
26
27static const u8 tuning_blk_pattern_4bit[] = {
28 0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
29 0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
30 0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb,
31 0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef,
32 0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c,
33 0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee,
34 0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff,
35 0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
36};
37
38static const u8 tuning_blk_pattern_8bit[] = {
39 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
40 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
41 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
42 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
43 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
44 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
45 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
46 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
47 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
48 0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
49 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
50 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
51 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
52 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
53 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
54 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
55};
56
57int mmc_send_status(struct mmc_card *card, u32 *status)
58{
59 int err;
60 struct mmc_command cmd = {0};
61
62 cmd.opcode = MMC_SEND_STATUS;
63 if (!mmc_host_is_spi(card->host))
64 cmd.arg = card->rca << 16;
65 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
66
67 err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
68 if (err)
69 return err;
70
71 /* NOTE: callers are required to understand the difference
72 * between "native" and SPI format status words!
73 */
74 if (status)
75 *status = cmd.resp[0];
76
77 return 0;
78}
79
80static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
81{
82 struct mmc_command cmd = {0};
83
84 cmd.opcode = MMC_SELECT_CARD;
85
86 if (card) {
87 cmd.arg = card->rca << 16;
88 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
89 } else {
90 cmd.arg = 0;
91 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
92 }
93
94 return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
95}
96
97int mmc_select_card(struct mmc_card *card)
98{
99
100 return _mmc_select_card(card->host, card);
101}
102
103int mmc_deselect_cards(struct mmc_host *host)
104{
105 return _mmc_select_card(host, NULL);
106}
107
108/*
109 * Write the value specified in the device tree or board code into the optional
110 * 16 bit Driver Stage Register. This can be used to tune raise/fall times and
111 * drive strength of the DAT and CMD outputs. The actual meaning of a given
112 * value is hardware dependant.
113 * The presence of the DSR register can be determined from the CSD register,
114 * bit 76.
115 */
116int mmc_set_dsr(struct mmc_host *host)
117{
118 struct mmc_command cmd = {0};
119
120 cmd.opcode = MMC_SET_DSR;
121
122 cmd.arg = (host->dsr << 16) | 0xffff;
123 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
124
125 return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
126}
127
128int mmc_go_idle(struct mmc_host *host)
129{
130 int err;
131 struct mmc_command cmd = {0};
132
133 /*
134 * Non-SPI hosts need to prevent chipselect going active during
135 * GO_IDLE; that would put chips into SPI mode. Remind them of
136 * that in case of hardware that won't pull up DAT3/nCS otherwise.
137 *
138 * SPI hosts ignore ios.chip_select; it's managed according to
139 * rules that must accommodate non-MMC slaves which this layer
140 * won't even know about.
141 */
142 if (!mmc_host_is_spi(host)) {
143 mmc_set_chip_select(host, MMC_CS_HIGH);
144 mmc_delay(1);
145 }
146
147 cmd.opcode = MMC_GO_IDLE_STATE;
148 cmd.arg = 0;
149 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
150
151 err = mmc_wait_for_cmd(host, &cmd, 0);
152
153 mmc_delay(1);
154
155 if (!mmc_host_is_spi(host)) {
156 mmc_set_chip_select(host, MMC_CS_DONTCARE);
157 mmc_delay(1);
158 }
159
160 host->use_spi_crc = 0;
161
162 return err;
163}
164
165int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
166{
167 struct mmc_command cmd = {0};
168 int i, err = 0;
169
170 cmd.opcode = MMC_SEND_OP_COND;
171 cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
172 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
173
174 for (i = 100; i; i--) {
175 err = mmc_wait_for_cmd(host, &cmd, 0);
176 if (err)
177 break;
178
179 /* if we're just probing, do a single pass */
180 if (ocr == 0)
181 break;
182
183 /* otherwise wait until reset completes */
184 if (mmc_host_is_spi(host)) {
185 if (!(cmd.resp[0] & R1_SPI_IDLE))
186 break;
187 } else {
188 if (cmd.resp[0] & MMC_CARD_BUSY)
189 break;
190 }
191
192 err = -ETIMEDOUT;
193
194 mmc_delay(10);
195 }
196
197 if (rocr && !mmc_host_is_spi(host))
198 *rocr = cmd.resp[0];
199
200 return err;
201}
202
203int mmc_all_send_cid(struct mmc_host *host, u32 *cid)
204{
205 int err;
206 struct mmc_command cmd = {0};
207
208 cmd.opcode = MMC_ALL_SEND_CID;
209 cmd.arg = 0;
210 cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
211
212 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
213 if (err)
214 return err;
215
216 memcpy(cid, cmd.resp, sizeof(u32) * 4);
217
218 return 0;
219}
220
221int mmc_set_relative_addr(struct mmc_card *card)
222{
223 struct mmc_command cmd = {0};
224
225 cmd.opcode = MMC_SET_RELATIVE_ADDR;
226 cmd.arg = card->rca << 16;
227 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
228
229 return mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
230}
231
232static int
233mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
234{
235 int err;
236 struct mmc_command cmd = {0};
237
238 cmd.opcode = opcode;
239 cmd.arg = arg;
240 cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
241
242 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
243 if (err)
244 return err;
245
246 memcpy(cxd, cmd.resp, sizeof(u32) * 4);
247
248 return 0;
249}
250
251/*
252 * NOTE: void *buf, caller for the buf is required to use DMA-capable
253 * buffer or on-stack buffer (with some overhead in callee).
254 */
255static int
256mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
257 u32 opcode, void *buf, unsigned len)
258{
259 struct mmc_request mrq = {NULL};
260 struct mmc_command cmd = {0};
261 struct mmc_data data = {0};
262 struct scatterlist sg;
263
264 mrq.cmd = &cmd;
265 mrq.data = &data;
266
267 cmd.opcode = opcode;
268 cmd.arg = 0;
269
270 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
271 * rely on callers to never use this with "native" calls for reading
272 * CSD or CID. Native versions of those commands use the R2 type,
273 * not R1 plus a data block.
274 */
275 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
276
277 data.blksz = len;
278 data.blocks = 1;
279 data.flags = MMC_DATA_READ;
280 data.sg = &sg;
281 data.sg_len = 1;
282
283 sg_init_one(&sg, buf, len);
284
285 if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) {
286 /*
287 * The spec states that CSR and CID accesses have a timeout
288 * of 64 clock cycles.
289 */
290 data.timeout_ns = 0;
291 data.timeout_clks = 64;
292 } else
293 mmc_set_data_timeout(&data, card);
294
295 mmc_wait_for_req(host, &mrq);
296
297 if (cmd.error)
298 return cmd.error;
299 if (data.error)
300 return data.error;
301
302 return 0;
303}
304
305int mmc_send_csd(struct mmc_card *card, u32 *csd)
306{
307 int ret, i;
308 u32 *csd_tmp;
309
310 if (!mmc_host_is_spi(card->host))
311 return mmc_send_cxd_native(card->host, card->rca << 16,
312 csd, MMC_SEND_CSD);
313
314 csd_tmp = kzalloc(16, GFP_KERNEL);
315 if (!csd_tmp)
316 return -ENOMEM;
317
318 ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd_tmp, 16);
319 if (ret)
320 goto err;
321
322 for (i = 0;i < 4;i++)
323 csd[i] = be32_to_cpu(csd_tmp[i]);
324
325err:
326 kfree(csd_tmp);
327 return ret;
328}
329
330int mmc_send_cid(struct mmc_host *host, u32 *cid)
331{
332 int ret, i;
333 u32 *cid_tmp;
334
335 if (!mmc_host_is_spi(host)) {
336 if (!host->card)
337 return -EINVAL;
338 return mmc_send_cxd_native(host, host->card->rca << 16,
339 cid, MMC_SEND_CID);
340 }
341
342 cid_tmp = kzalloc(16, GFP_KERNEL);
343 if (!cid_tmp)
344 return -ENOMEM;
345
346 ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid_tmp, 16);
347 if (ret)
348 goto err;
349
350 for (i = 0;i < 4;i++)
351 cid[i] = be32_to_cpu(cid_tmp[i]);
352
353err:
354 kfree(cid_tmp);
355 return ret;
356}
357
358int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
359{
360 int err;
361 u8 *ext_csd;
362
363 if (!card || !new_ext_csd)
364 return -EINVAL;
365
366 if (!mmc_can_ext_csd(card))
367 return -EOPNOTSUPP;
368
369 /*
370 * As the ext_csd is so large and mostly unused, we don't store the
371 * raw block in mmc_card.
372 */
373 ext_csd = kzalloc(512, GFP_KERNEL);
374 if (!ext_csd)
375 return -ENOMEM;
376
377 err = mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, ext_csd,
378 512);
379 if (err)
380 kfree(ext_csd);
381 else
382 *new_ext_csd = ext_csd;
383
384 return err;
385}
386EXPORT_SYMBOL_GPL(mmc_get_ext_csd);
387
388int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
389{
390 struct mmc_command cmd = {0};
391 int err;
392
393 cmd.opcode = MMC_SPI_READ_OCR;
394 cmd.arg = highcap ? (1 << 30) : 0;
395 cmd.flags = MMC_RSP_SPI_R3;
396
397 err = mmc_wait_for_cmd(host, &cmd, 0);
398
399 *ocrp = cmd.resp[1];
400 return err;
401}
402
403int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
404{
405 struct mmc_command cmd = {0};
406 int err;
407
408 cmd.opcode = MMC_SPI_CRC_ON_OFF;
409 cmd.flags = MMC_RSP_SPI_R1;
410 cmd.arg = use_crc;
411
412 err = mmc_wait_for_cmd(host, &cmd, 0);
413 if (!err)
414 host->use_spi_crc = use_crc;
415 return err;
416}
417
418static int mmc_switch_status_error(struct mmc_host *host, u32 status)
419{
420 if (mmc_host_is_spi(host)) {
421 if (status & R1_SPI_ILLEGAL_COMMAND)
422 return -EBADMSG;
423 } else {
424 if (status & 0xFDFFA000)
425 pr_warn("%s: unexpected status %#x after switch\n",
426 mmc_hostname(host), status);
427 if (status & R1_SWITCH_ERROR)
428 return -EBADMSG;
429 }
430 return 0;
431}
432
433/* Caller must hold re-tuning */
434int __mmc_switch_status(struct mmc_card *card, bool crc_err_fatal)
435{
436 u32 status;
437 int err;
438
439 err = mmc_send_status(card, &status);
440 if (!crc_err_fatal && err == -EILSEQ)
441 return 0;
442 if (err)
443 return err;
444
445 return mmc_switch_status_error(card->host, status);
446}
447
448int mmc_switch_status(struct mmc_card *card)
449{
450 return __mmc_switch_status(card, true);
451}
452
453static int mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
454 bool send_status, bool retry_crc_err)
455{
456 struct mmc_host *host = card->host;
457 int err;
458 unsigned long timeout;
459 u32 status = 0;
460 bool expired = false;
461 bool busy = false;
462
463 /* We have an unspecified cmd timeout, use the fallback value. */
464 if (!timeout_ms)
465 timeout_ms = MMC_OPS_TIMEOUT_MS;
466
467 /*
468 * In cases when not allowed to poll by using CMD13 or because we aren't
469 * capable of polling by using ->card_busy(), then rely on waiting the
470 * stated timeout to be sufficient.
471 */
472 if (!send_status && !host->ops->card_busy) {
473 mmc_delay(timeout_ms);
474 return 0;
475 }
476
477 timeout = jiffies + msecs_to_jiffies(timeout_ms) + 1;
478 do {
479 /*
480 * Due to the possibility of being preempted while polling,
481 * check the expiration time first.
482 */
483 expired = time_after(jiffies, timeout);
484
485 if (host->ops->card_busy) {
486 busy = host->ops->card_busy(host);
487 } else {
488 err = mmc_send_status(card, &status);
489 if (retry_crc_err && err == -EILSEQ) {
490 busy = true;
491 } else if (err) {
492 return err;
493 } else {
494 err = mmc_switch_status_error(host, status);
495 if (err)
496 return err;
497 busy = R1_CURRENT_STATE(status) == R1_STATE_PRG;
498 }
499 }
500
501 /* Timeout if the device still remains busy. */
502 if (expired && busy) {
503 pr_err("%s: Card stuck being busy! %s\n",
504 mmc_hostname(host), __func__);
505 return -ETIMEDOUT;
506 }
507 } while (busy);
508
509 return 0;
510}
511
512/**
513 * __mmc_switch - modify EXT_CSD register
514 * @card: the MMC card associated with the data transfer
515 * @set: cmd set values
516 * @index: EXT_CSD register index
517 * @value: value to program into EXT_CSD register
518 * @timeout_ms: timeout (ms) for operation performed by register write,
519 * timeout of zero implies maximum possible timeout
520 * @timing: new timing to change to
521 * @use_busy_signal: use the busy signal as response type
522 * @send_status: send status cmd to poll for busy
523 * @retry_crc_err: retry when CRC errors when polling with CMD13 for busy
524 *
525 * Modifies the EXT_CSD register for selected card.
526 */
527int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
528 unsigned int timeout_ms, unsigned char timing,
529 bool use_busy_signal, bool send_status, bool retry_crc_err)
530{
531 struct mmc_host *host = card->host;
532 int err;
533 struct mmc_command cmd = {0};
534 bool use_r1b_resp = use_busy_signal;
535 unsigned char old_timing = host->ios.timing;
536
537 mmc_retune_hold(host);
538
539 /*
540 * If the cmd timeout and the max_busy_timeout of the host are both
541 * specified, let's validate them. A failure means we need to prevent
542 * the host from doing hw busy detection, which is done by converting
543 * to a R1 response instead of a R1B.
544 */
545 if (timeout_ms && host->max_busy_timeout &&
546 (timeout_ms > host->max_busy_timeout))
547 use_r1b_resp = false;
548
549 cmd.opcode = MMC_SWITCH;
550 cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
551 (index << 16) |
552 (value << 8) |
553 set;
554 cmd.flags = MMC_CMD_AC;
555 if (use_r1b_resp) {
556 cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B;
557 /*
558 * A busy_timeout of zero means the host can decide to use
559 * whatever value it finds suitable.
560 */
561 cmd.busy_timeout = timeout_ms;
562 } else {
563 cmd.flags |= MMC_RSP_SPI_R1 | MMC_RSP_R1;
564 }
565
566 if (index == EXT_CSD_SANITIZE_START)
567 cmd.sanitize_busy = true;
568
569 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
570 if (err)
571 goto out;
572
573 /* No need to check card status in case of unblocking command */
574 if (!use_busy_signal)
575 goto out;
576
577 /*If SPI or used HW busy detection above, then we don't need to poll. */
578 if (((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) ||
579 mmc_host_is_spi(host))
580 goto out_tim;
581
582 /* Let's try to poll to find out when the command is completed. */
583 err = mmc_poll_for_busy(card, timeout_ms, send_status, retry_crc_err);
584 if (err)
585 goto out;
586
587out_tim:
588 /* Switch to new timing before check switch status. */
589 if (timing)
590 mmc_set_timing(host, timing);
591
592 if (send_status) {
593 err = mmc_switch_status(card);
594 if (err && timing)
595 mmc_set_timing(host, old_timing);
596 }
597out:
598 mmc_retune_release(host);
599
600 return err;
601}
602
603int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
604 unsigned int timeout_ms)
605{
606 return __mmc_switch(card, set, index, value, timeout_ms, 0,
607 true, true, false);
608}
609EXPORT_SYMBOL_GPL(mmc_switch);
610
611int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error)
612{
613 struct mmc_request mrq = {NULL};
614 struct mmc_command cmd = {0};
615 struct mmc_data data = {0};
616 struct scatterlist sg;
617 struct mmc_ios *ios = &host->ios;
618 const u8 *tuning_block_pattern;
619 int size, err = 0;
620 u8 *data_buf;
621
622 if (ios->bus_width == MMC_BUS_WIDTH_8) {
623 tuning_block_pattern = tuning_blk_pattern_8bit;
624 size = sizeof(tuning_blk_pattern_8bit);
625 } else if (ios->bus_width == MMC_BUS_WIDTH_4) {
626 tuning_block_pattern = tuning_blk_pattern_4bit;
627 size = sizeof(tuning_blk_pattern_4bit);
628 } else
629 return -EINVAL;
630
631 data_buf = kzalloc(size, GFP_KERNEL);
632 if (!data_buf)
633 return -ENOMEM;
634
635 mrq.cmd = &cmd;
636 mrq.data = &data;
637
638 cmd.opcode = opcode;
639 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
640
641 data.blksz = size;
642 data.blocks = 1;
643 data.flags = MMC_DATA_READ;
644
645 /*
646 * According to the tuning specs, Tuning process
647 * is normally shorter 40 executions of CMD19,
648 * and timeout value should be shorter than 150 ms
649 */
650 data.timeout_ns = 150 * NSEC_PER_MSEC;
651
652 data.sg = &sg;
653 data.sg_len = 1;
654 sg_init_one(&sg, data_buf, size);
655
656 mmc_wait_for_req(host, &mrq);
657
658 if (cmd_error)
659 *cmd_error = cmd.error;
660
661 if (cmd.error) {
662 err = cmd.error;
663 goto out;
664 }
665
666 if (data.error) {
667 err = data.error;
668 goto out;
669 }
670
671 if (memcmp(data_buf, tuning_block_pattern, size))
672 err = -EIO;
673
674out:
675 kfree(data_buf);
676 return err;
677}
678EXPORT_SYMBOL_GPL(mmc_send_tuning);
679
680int mmc_abort_tuning(struct mmc_host *host, u32 opcode)
681{
682 struct mmc_command cmd = {0};
683
684 /*
685 * eMMC specification specifies that CMD12 can be used to stop a tuning
686 * command, but SD specification does not, so do nothing unless it is
687 * eMMC.
688 */
689 if (opcode != MMC_SEND_TUNING_BLOCK_HS200)
690 return 0;
691
692 cmd.opcode = MMC_STOP_TRANSMISSION;
693 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
694
695 /*
696 * For drivers that override R1 to R1b, set an arbitrary timeout based
697 * on the tuning timeout i.e. 150ms.
698 */
699 cmd.busy_timeout = 150;
700
701 return mmc_wait_for_cmd(host, &cmd, 0);
702}
703EXPORT_SYMBOL_GPL(mmc_abort_tuning);
704
705static int
706mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
707 u8 len)
708{
709 struct mmc_request mrq = {NULL};
710 struct mmc_command cmd = {0};
711 struct mmc_data data = {0};
712 struct scatterlist sg;
713 u8 *data_buf;
714 u8 *test_buf;
715 int i, err;
716 static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 };
717 static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 };
718
719 /* dma onto stack is unsafe/nonportable, but callers to this
720 * routine normally provide temporary on-stack buffers ...
721 */
722 data_buf = kmalloc(len, GFP_KERNEL);
723 if (!data_buf)
724 return -ENOMEM;
725
726 if (len == 8)
727 test_buf = testdata_8bit;
728 else if (len == 4)
729 test_buf = testdata_4bit;
730 else {
731 pr_err("%s: Invalid bus_width %d\n",
732 mmc_hostname(host), len);
733 kfree(data_buf);
734 return -EINVAL;
735 }
736
737 if (opcode == MMC_BUS_TEST_W)
738 memcpy(data_buf, test_buf, len);
739
740 mrq.cmd = &cmd;
741 mrq.data = &data;
742 cmd.opcode = opcode;
743 cmd.arg = 0;
744
745 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
746 * rely on callers to never use this with "native" calls for reading
747 * CSD or CID. Native versions of those commands use the R2 type,
748 * not R1 plus a data block.
749 */
750 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
751
752 data.blksz = len;
753 data.blocks = 1;
754 if (opcode == MMC_BUS_TEST_R)
755 data.flags = MMC_DATA_READ;
756 else
757 data.flags = MMC_DATA_WRITE;
758
759 data.sg = &sg;
760 data.sg_len = 1;
761 mmc_set_data_timeout(&data, card);
762 sg_init_one(&sg, data_buf, len);
763 mmc_wait_for_req(host, &mrq);
764 err = 0;
765 if (opcode == MMC_BUS_TEST_R) {
766 for (i = 0; i < len / 4; i++)
767 if ((test_buf[i] ^ data_buf[i]) != 0xff) {
768 err = -EIO;
769 break;
770 }
771 }
772 kfree(data_buf);
773
774 if (cmd.error)
775 return cmd.error;
776 if (data.error)
777 return data.error;
778
779 return err;
780}
781
782int mmc_bus_test(struct mmc_card *card, u8 bus_width)
783{
784 int width;
785
786 if (bus_width == MMC_BUS_WIDTH_8)
787 width = 8;
788 else if (bus_width == MMC_BUS_WIDTH_4)
789 width = 4;
790 else if (bus_width == MMC_BUS_WIDTH_1)
791 return 0; /* no need for test */
792 else
793 return -EINVAL;
794
795 /*
796 * Ignore errors from BUS_TEST_W. BUS_TEST_R will fail if there
797 * is a problem. This improves chances that the test will work.
798 */
799 mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width);
800 return mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width);
801}
802
803int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
804{
805 struct mmc_command cmd = {0};
806 unsigned int opcode;
807 int err;
808
809 if (!card->ext_csd.hpi) {
810 pr_warn("%s: Card didn't support HPI command\n",
811 mmc_hostname(card->host));
812 return -EINVAL;
813 }
814
815 opcode = card->ext_csd.hpi_cmd;
816 if (opcode == MMC_STOP_TRANSMISSION)
817 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
818 else if (opcode == MMC_SEND_STATUS)
819 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
820
821 cmd.opcode = opcode;
822 cmd.arg = card->rca << 16 | 1;
823
824 err = mmc_wait_for_cmd(card->host, &cmd, 0);
825 if (err) {
826 pr_warn("%s: error %d interrupting operation. "
827 "HPI command response %#x\n", mmc_hostname(card->host),
828 err, cmd.resp[0]);
829 return err;
830 }
831 if (status)
832 *status = cmd.resp[0];
833
834 return 0;
835}
836
837int mmc_can_ext_csd(struct mmc_card *card)
838{
839 return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);
840}