1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * linux/drivers/mmc/core/mmc_ops.h
5 * Copyright 2006-2007 Pierre Ossman
8 #include <linux/slab.h>
9 #include <linux/export.h>
10 #include <linux/types.h>
11 #include <linux/scatterlist.h>
13 #include <linux/mmc/host.h>
14 #include <linux/mmc/card.h>
15 #include <linux/mmc/mmc.h>
22 #define MMC_BKOPS_TIMEOUT_MS (120 * 1000) /* 120s */
23 #define MMC_SANITIZE_TIMEOUT_MS (240 * 1000) /* 240s */
24 #define MMC_OP_COND_PERIOD_US (4 * 1000) /* 4ms */
25 #define MMC_OP_COND_TIMEOUT_MS 1000 /* 1s */
27 static 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,
38 static 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,
57 struct mmc_busy_data {
58 struct mmc_card *card;
60 enum mmc_busy_cmd busy_cmd;
63 struct mmc_op_cond_busy_data {
64 struct mmc_host *host;
66 struct mmc_command *cmd;
69 int __mmc_send_status(struct mmc_card *card, u32 *status, unsigned int retries)
72 struct mmc_command cmd = {};
74 cmd.opcode = MMC_SEND_STATUS;
75 if (!mmc_host_is_spi(card->host))
76 cmd.arg = card->rca << 16;
77 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
79 err = mmc_wait_for_cmd(card->host, &cmd, retries);
83 /* NOTE: callers are required to understand the difference
84 * between "native" and SPI format status words!
87 *status = cmd.resp[0];
91 EXPORT_SYMBOL_GPL(__mmc_send_status);
93 int mmc_send_status(struct mmc_card *card, u32 *status)
95 return __mmc_send_status(card, status, MMC_CMD_RETRIES);
97 EXPORT_SYMBOL_GPL(mmc_send_status);
99 static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
101 struct mmc_command cmd = {};
103 cmd.opcode = MMC_SELECT_CARD;
106 cmd.arg = card->rca << 16;
107 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
110 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
113 return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
116 int mmc_select_card(struct mmc_card *card)
119 return _mmc_select_card(card->host, card);
122 int mmc_deselect_cards(struct mmc_host *host)
124 return _mmc_select_card(host, NULL);
128 * Write the value specified in the device tree or board code into the optional
129 * 16 bit Driver Stage Register. This can be used to tune raise/fall times and
130 * drive strength of the DAT and CMD outputs. The actual meaning of a given
131 * value is hardware dependant.
132 * The presence of the DSR register can be determined from the CSD register,
135 int mmc_set_dsr(struct mmc_host *host)
137 struct mmc_command cmd = {};
139 cmd.opcode = MMC_SET_DSR;
141 cmd.arg = (host->dsr << 16) | 0xffff;
142 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
144 return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
147 int mmc_go_idle(struct mmc_host *host)
150 struct mmc_command cmd = {};
153 * Non-SPI hosts need to prevent chipselect going active during
154 * GO_IDLE; that would put chips into SPI mode. Remind them of
155 * that in case of hardware that won't pull up DAT3/nCS otherwise.
157 * SPI hosts ignore ios.chip_select; it's managed according to
158 * rules that must accommodate non-MMC slaves which this layer
159 * won't even know about.
161 if (!mmc_host_is_spi(host)) {
162 mmc_set_chip_select(host, MMC_CS_HIGH);
166 cmd.opcode = MMC_GO_IDLE_STATE;
168 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
170 err = mmc_wait_for_cmd(host, &cmd, 0);
174 if (!mmc_host_is_spi(host)) {
175 mmc_set_chip_select(host, MMC_CS_DONTCARE);
179 host->use_spi_crc = 0;
184 static int __mmc_send_op_cond_cb(void *cb_data, bool *busy)
186 struct mmc_op_cond_busy_data *data = cb_data;
187 struct mmc_host *host = data->host;
188 struct mmc_command *cmd = data->cmd;
192 err = mmc_wait_for_cmd(host, cmd, 0);
196 if (mmc_host_is_spi(host)) {
197 if (!(cmd->resp[0] & R1_SPI_IDLE)) {
202 if (cmd->resp[0] & MMC_CARD_BUSY) {
211 * According to eMMC specification v5.1 section 6.4.3, we
212 * should issue CMD1 repeatedly in the idle state until
213 * the eMMC is ready. Otherwise some eMMC devices seem to enter
214 * the inactive mode after mmc_init_card() issued CMD0 when
215 * the eMMC device is busy.
217 if (!ocr && !mmc_host_is_spi(host))
218 cmd->arg = cmd->resp[0] | BIT(30);
223 int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
225 struct mmc_command cmd = {};
227 struct mmc_op_cond_busy_data cb_data = {
233 cmd.opcode = MMC_SEND_OP_COND;
234 cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
235 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
237 err = __mmc_poll_for_busy(host, MMC_OP_COND_PERIOD_US,
238 MMC_OP_COND_TIMEOUT_MS,
239 &__mmc_send_op_cond_cb, &cb_data);
243 if (rocr && !mmc_host_is_spi(host))
249 int mmc_set_relative_addr(struct mmc_card *card)
251 struct mmc_command cmd = {};
253 cmd.opcode = MMC_SET_RELATIVE_ADDR;
254 cmd.arg = card->rca << 16;
255 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
257 return mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
261 mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
264 struct mmc_command cmd = {};
268 cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
270 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
274 memcpy(cxd, cmd.resp, sizeof(u32) * 4);
280 * NOTE: void *buf, caller for the buf is required to use DMA-capable
281 * buffer or on-stack buffer (with some overhead in callee).
283 int mmc_send_adtc_data(struct mmc_card *card, struct mmc_host *host, u32 opcode,
284 u32 args, void *buf, unsigned len)
286 struct mmc_request mrq = {};
287 struct mmc_command cmd = {};
288 struct mmc_data data = {};
289 struct scatterlist sg;
297 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
298 * rely on callers to never use this with "native" calls for reading
299 * CSD or CID. Native versions of those commands use the R2 type,
300 * not R1 plus a data block.
302 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
306 data.flags = MMC_DATA_READ;
310 sg_init_one(&sg, buf, len);
312 if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) {
314 * The spec states that CSR and CID accesses have a timeout
315 * of 64 clock cycles.
318 data.timeout_clks = 64;
320 mmc_set_data_timeout(&data, card);
322 mmc_wait_for_req(host, &mrq);
332 static int mmc_spi_send_cxd(struct mmc_host *host, u32 *cxd, u32 opcode)
337 cxd_tmp = kzalloc(16, GFP_KERNEL);
341 ret = mmc_send_adtc_data(NULL, host, opcode, 0, cxd_tmp, 16);
345 for (i = 0; i < 4; i++)
346 cxd[i] = be32_to_cpu(cxd_tmp[i]);
353 int mmc_send_csd(struct mmc_card *card, u32 *csd)
355 if (mmc_host_is_spi(card->host))
356 return mmc_spi_send_cxd(card->host, csd, MMC_SEND_CSD);
358 return mmc_send_cxd_native(card->host, card->rca << 16, csd,
362 int mmc_send_cid(struct mmc_host *host, u32 *cid)
364 if (mmc_host_is_spi(host))
365 return mmc_spi_send_cxd(host, cid, MMC_SEND_CID);
367 return mmc_send_cxd_native(host, 0, cid, MMC_ALL_SEND_CID);
370 int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
375 if (!card || !new_ext_csd)
378 if (!mmc_can_ext_csd(card))
382 * As the ext_csd is so large and mostly unused, we don't store the
383 * raw block in mmc_card.
385 ext_csd = kzalloc(512, GFP_KERNEL);
389 err = mmc_send_adtc_data(card, card->host, MMC_SEND_EXT_CSD, 0, ext_csd,
394 *new_ext_csd = ext_csd;
398 EXPORT_SYMBOL_GPL(mmc_get_ext_csd);
400 int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
402 struct mmc_command cmd = {};
405 cmd.opcode = MMC_SPI_READ_OCR;
406 cmd.arg = highcap ? (1 << 30) : 0;
407 cmd.flags = MMC_RSP_SPI_R3;
409 err = mmc_wait_for_cmd(host, &cmd, 0);
415 int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
417 struct mmc_command cmd = {};
420 cmd.opcode = MMC_SPI_CRC_ON_OFF;
421 cmd.flags = MMC_RSP_SPI_R1;
424 err = mmc_wait_for_cmd(host, &cmd, 0);
426 host->use_spi_crc = use_crc;
430 static int mmc_switch_status_error(struct mmc_host *host, u32 status)
432 if (mmc_host_is_spi(host)) {
433 if (status & R1_SPI_ILLEGAL_COMMAND)
436 if (R1_STATUS(status))
437 pr_warn("%s: unexpected status %#x after switch\n",
438 mmc_hostname(host), status);
439 if (status & R1_SWITCH_ERROR)
445 /* Caller must hold re-tuning */
446 int mmc_switch_status(struct mmc_card *card, bool crc_err_fatal)
451 err = mmc_send_status(card, &status);
452 if (!crc_err_fatal && err == -EILSEQ)
457 return mmc_switch_status_error(card->host, status);
460 static int mmc_busy_cb(void *cb_data, bool *busy)
462 struct mmc_busy_data *data = cb_data;
463 struct mmc_host *host = data->card->host;
467 if (data->busy_cmd != MMC_BUSY_IO && host->ops->card_busy) {
468 *busy = host->ops->card_busy(host);
472 err = mmc_send_status(data->card, &status);
473 if (data->retry_crc_err && err == -EILSEQ) {
480 switch (data->busy_cmd) {
482 err = mmc_switch_status_error(host, status);
485 err = R1_STATUS(status) ? -EIO : 0;
488 case MMC_BUSY_EXTR_SINGLE:
498 *busy = !mmc_ready_for_data(status);
502 int __mmc_poll_for_busy(struct mmc_host *host, unsigned int period_us,
503 unsigned int timeout_ms,
504 int (*busy_cb)(void *cb_data, bool *busy),
508 unsigned long timeout;
509 unsigned int udelay = period_us ? period_us : 32, udelay_max = 32768;
510 bool expired = false;
513 timeout = jiffies + msecs_to_jiffies(timeout_ms) + 1;
516 * Due to the possibility of being preempted while polling,
517 * check the expiration time first.
519 expired = time_after(jiffies, timeout);
521 err = (*busy_cb)(cb_data, &busy);
525 /* Timeout if the device still remains busy. */
526 if (expired && busy) {
527 pr_err("%s: Card stuck being busy! %s\n",
528 mmc_hostname(host), __func__);
532 /* Throttle the polling rate to avoid hogging the CPU. */
534 usleep_range(udelay, udelay * 2);
535 if (udelay < udelay_max)
542 EXPORT_SYMBOL_GPL(__mmc_poll_for_busy);
544 int mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
545 bool retry_crc_err, enum mmc_busy_cmd busy_cmd)
547 struct mmc_host *host = card->host;
548 struct mmc_busy_data cb_data;
551 cb_data.retry_crc_err = retry_crc_err;
552 cb_data.busy_cmd = busy_cmd;
554 return __mmc_poll_for_busy(host, 0, timeout_ms, &mmc_busy_cb, &cb_data);
556 EXPORT_SYMBOL_GPL(mmc_poll_for_busy);
558 bool mmc_prepare_busy_cmd(struct mmc_host *host, struct mmc_command *cmd,
559 unsigned int timeout_ms)
562 * If the max_busy_timeout of the host is specified, make sure it's
563 * enough to fit the used timeout_ms. In case it's not, let's instruct
564 * the host to avoid HW busy detection, by converting to a R1 response
565 * instead of a R1B. Note, some hosts requires R1B, which also means
566 * they are on their own when it comes to deal with the busy timeout.
568 if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && host->max_busy_timeout &&
569 (timeout_ms > host->max_busy_timeout)) {
570 cmd->flags = MMC_CMD_AC | MMC_RSP_SPI_R1 | MMC_RSP_R1;
574 cmd->flags = MMC_CMD_AC | MMC_RSP_SPI_R1B | MMC_RSP_R1B;
575 cmd->busy_timeout = timeout_ms;
578 EXPORT_SYMBOL_GPL(mmc_prepare_busy_cmd);
581 * __mmc_switch - modify EXT_CSD register
582 * @card: the MMC card associated with the data transfer
583 * @set: cmd set values
584 * @index: EXT_CSD register index
585 * @value: value to program into EXT_CSD register
586 * @timeout_ms: timeout (ms) for operation performed by register write,
587 * timeout of zero implies maximum possible timeout
588 * @timing: new timing to change to
589 * @send_status: send status cmd to poll for busy
590 * @retry_crc_err: retry when CRC errors when polling with CMD13 for busy
591 * @retries: number of retries
593 * Modifies the EXT_CSD register for selected card.
595 int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
596 unsigned int timeout_ms, unsigned char timing,
597 bool send_status, bool retry_crc_err, unsigned int retries)
599 struct mmc_host *host = card->host;
601 struct mmc_command cmd = {};
603 unsigned char old_timing = host->ios.timing;
605 mmc_retune_hold(host);
608 pr_warn("%s: unspecified timeout for CMD6 - use generic\n",
610 timeout_ms = card->ext_csd.generic_cmd6_time;
613 cmd.opcode = MMC_SWITCH;
614 cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
618 use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd, timeout_ms);
620 err = mmc_wait_for_cmd(host, &cmd, retries);
624 /*If SPI or used HW busy detection above, then we don't need to poll. */
625 if (((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) ||
626 mmc_host_is_spi(host))
630 * If the host doesn't support HW polling via the ->card_busy() ops and
631 * when it's not allowed to poll by using CMD13, then we need to rely on
632 * waiting the stated timeout to be sufficient.
634 if (!send_status && !host->ops->card_busy) {
635 mmc_delay(timeout_ms);
639 /* Let's try to poll to find out when the command is completed. */
640 err = mmc_poll_for_busy(card, timeout_ms, retry_crc_err, MMC_BUSY_CMD6);
645 /* Switch to new timing before check switch status. */
647 mmc_set_timing(host, timing);
650 err = mmc_switch_status(card, true);
652 mmc_set_timing(host, old_timing);
655 mmc_retune_release(host);
660 int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
661 unsigned int timeout_ms)
663 return __mmc_switch(card, set, index, value, timeout_ms, 0,
664 true, false, MMC_CMD_RETRIES);
666 EXPORT_SYMBOL_GPL(mmc_switch);
668 int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error)
670 struct mmc_request mrq = {};
671 struct mmc_command cmd = {};
672 struct mmc_data data = {};
673 struct scatterlist sg;
674 struct mmc_ios *ios = &host->ios;
675 const u8 *tuning_block_pattern;
679 if (ios->bus_width == MMC_BUS_WIDTH_8) {
680 tuning_block_pattern = tuning_blk_pattern_8bit;
681 size = sizeof(tuning_blk_pattern_8bit);
682 } else if (ios->bus_width == MMC_BUS_WIDTH_4) {
683 tuning_block_pattern = tuning_blk_pattern_4bit;
684 size = sizeof(tuning_blk_pattern_4bit);
688 data_buf = kzalloc(size, GFP_KERNEL);
696 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
700 data.flags = MMC_DATA_READ;
703 * According to the tuning specs, Tuning process
704 * is normally shorter 40 executions of CMD19,
705 * and timeout value should be shorter than 150 ms
707 data.timeout_ns = 150 * NSEC_PER_MSEC;
711 sg_init_one(&sg, data_buf, size);
713 mmc_wait_for_req(host, &mrq);
716 *cmd_error = cmd.error;
728 if (memcmp(data_buf, tuning_block_pattern, size))
735 EXPORT_SYMBOL_GPL(mmc_send_tuning);
737 int mmc_send_abort_tuning(struct mmc_host *host, u32 opcode)
739 struct mmc_command cmd = {};
742 * eMMC specification specifies that CMD12 can be used to stop a tuning
743 * command, but SD specification does not, so do nothing unless it is
746 if (opcode != MMC_SEND_TUNING_BLOCK_HS200)
749 cmd.opcode = MMC_STOP_TRANSMISSION;
750 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
753 * For drivers that override R1 to R1b, set an arbitrary timeout based
754 * on the tuning timeout i.e. 150ms.
756 cmd.busy_timeout = 150;
758 return mmc_wait_for_cmd(host, &cmd, 0);
760 EXPORT_SYMBOL_GPL(mmc_send_abort_tuning);
763 mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
766 struct mmc_request mrq = {};
767 struct mmc_command cmd = {};
768 struct mmc_data data = {};
769 struct scatterlist sg;
773 static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 };
774 static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 };
776 /* dma onto stack is unsafe/nonportable, but callers to this
777 * routine normally provide temporary on-stack buffers ...
779 data_buf = kmalloc(len, GFP_KERNEL);
784 test_buf = testdata_8bit;
786 test_buf = testdata_4bit;
788 pr_err("%s: Invalid bus_width %d\n",
789 mmc_hostname(host), len);
794 if (opcode == MMC_BUS_TEST_W)
795 memcpy(data_buf, test_buf, len);
802 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
803 * rely on callers to never use this with "native" calls for reading
804 * CSD or CID. Native versions of those commands use the R2 type,
805 * not R1 plus a data block.
807 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
811 if (opcode == MMC_BUS_TEST_R)
812 data.flags = MMC_DATA_READ;
814 data.flags = MMC_DATA_WRITE;
818 mmc_set_data_timeout(&data, card);
819 sg_init_one(&sg, data_buf, len);
820 mmc_wait_for_req(host, &mrq);
822 if (opcode == MMC_BUS_TEST_R) {
823 for (i = 0; i < len / 4; i++)
824 if ((test_buf[i] ^ data_buf[i]) != 0xff) {
839 int mmc_bus_test(struct mmc_card *card, u8 bus_width)
843 if (bus_width == MMC_BUS_WIDTH_8)
845 else if (bus_width == MMC_BUS_WIDTH_4)
847 else if (bus_width == MMC_BUS_WIDTH_1)
848 return 0; /* no need for test */
853 * Ignore errors from BUS_TEST_W. BUS_TEST_R will fail if there
854 * is a problem. This improves chances that the test will work.
856 mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width);
857 return mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width);
860 static int mmc_send_hpi_cmd(struct mmc_card *card)
862 unsigned int busy_timeout_ms = card->ext_csd.out_of_int_time;
863 struct mmc_host *host = card->host;
864 bool use_r1b_resp = false;
865 struct mmc_command cmd = {};
868 cmd.opcode = card->ext_csd.hpi_cmd;
869 cmd.arg = card->rca << 16 | 1;
870 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
872 if (cmd.opcode == MMC_STOP_TRANSMISSION)
873 use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd,
876 err = mmc_wait_for_cmd(host, &cmd, 0);
878 pr_warn("%s: HPI error %d. Command response %#x\n",
879 mmc_hostname(host), err, cmd.resp[0]);
883 /* No need to poll when using HW busy detection. */
884 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY && use_r1b_resp)
887 /* Let's poll to find out when the HPI request completes. */
888 return mmc_poll_for_busy(card, busy_timeout_ms, false, MMC_BUSY_HPI);
892 * mmc_interrupt_hpi - Issue for High priority Interrupt
893 * @card: the MMC card associated with the HPI transfer
895 * Issued High Priority Interrupt, and check for card status
896 * until out-of prg-state.
898 static int mmc_interrupt_hpi(struct mmc_card *card)
903 if (!card->ext_csd.hpi_en) {
904 pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host));
908 err = mmc_send_status(card, &status);
910 pr_err("%s: Get card status fail\n", mmc_hostname(card->host));
914 switch (R1_CURRENT_STATE(status)) {
920 * In idle and transfer states, HPI is not needed and the caller
921 * can issue the next intended command immediately
927 /* In all other states, it's illegal to issue HPI */
928 pr_debug("%s: HPI cannot be sent. Card state=%d\n",
929 mmc_hostname(card->host), R1_CURRENT_STATE(status));
934 err = mmc_send_hpi_cmd(card);
939 int mmc_can_ext_csd(struct mmc_card *card)
941 return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);
944 static int mmc_read_bkops_status(struct mmc_card *card)
949 err = mmc_get_ext_csd(card, &ext_csd);
953 card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS];
954 card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS];
960 * mmc_run_bkops - Run BKOPS for supported cards
961 * @card: MMC card to run BKOPS for
963 * Run background operations synchronously for cards having manual BKOPS
964 * enabled and in case it reports urgent BKOPS level.
966 void mmc_run_bkops(struct mmc_card *card)
970 if (!card->ext_csd.man_bkops_en)
973 err = mmc_read_bkops_status(card);
975 pr_err("%s: Failed to read bkops status: %d\n",
976 mmc_hostname(card->host), err);
980 if (!card->ext_csd.raw_bkops_status ||
981 card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2)
984 mmc_retune_hold(card->host);
987 * For urgent BKOPS status, LEVEL_2 and higher, let's execute
988 * synchronously. Future wise, we may consider to start BKOPS, for less
989 * urgent levels by using an asynchronous background task, when idle.
991 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
992 EXT_CSD_BKOPS_START, 1, MMC_BKOPS_TIMEOUT_MS);
994 * If the BKOPS timed out, the card is probably still busy in the
995 * R1_STATE_PRG. Rather than continue to wait, let's try to abort
996 * it with a HPI command to get back into R1_STATE_TRAN.
998 if (err == -ETIMEDOUT && !mmc_interrupt_hpi(card))
999 pr_warn("%s: BKOPS aborted\n", mmc_hostname(card->host));
1001 pr_warn("%s: Error %d running bkops\n",
1002 mmc_hostname(card->host), err);
1004 mmc_retune_release(card->host);
1006 EXPORT_SYMBOL(mmc_run_bkops);
1008 static int mmc_cmdq_switch(struct mmc_card *card, bool enable)
1010 u8 val = enable ? EXT_CSD_CMDQ_MODE_ENABLED : 0;
1013 if (!card->ext_csd.cmdq_support)
1016 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_CMDQ_MODE_EN,
1017 val, card->ext_csd.generic_cmd6_time);
1019 card->ext_csd.cmdq_en = enable;
1024 int mmc_cmdq_enable(struct mmc_card *card)
1026 return mmc_cmdq_switch(card, true);
1028 EXPORT_SYMBOL_GPL(mmc_cmdq_enable);
1030 int mmc_cmdq_disable(struct mmc_card *card)
1032 return mmc_cmdq_switch(card, false);
1034 EXPORT_SYMBOL_GPL(mmc_cmdq_disable);
1036 int mmc_sanitize(struct mmc_card *card, unsigned int timeout_ms)
1038 struct mmc_host *host = card->host;
1041 if (!mmc_can_sanitize(card)) {
1042 pr_warn("%s: Sanitize not supported\n", mmc_hostname(host));
1047 timeout_ms = MMC_SANITIZE_TIMEOUT_MS;
1049 pr_debug("%s: Sanitize in progress...\n", mmc_hostname(host));
1051 mmc_retune_hold(host);
1053 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_SANITIZE_START,
1054 1, timeout_ms, 0, true, false, 0);
1056 pr_err("%s: Sanitize failed err=%d\n", mmc_hostname(host), err);
1059 * If the sanitize operation timed out, the card is probably still busy
1060 * in the R1_STATE_PRG. Rather than continue to wait, let's try to abort
1061 * it with a HPI command to get back into R1_STATE_TRAN.
1063 if (err == -ETIMEDOUT && !mmc_interrupt_hpi(card))
1064 pr_warn("%s: Sanitize aborted\n", mmc_hostname(host));
1066 mmc_retune_release(host);
1068 pr_debug("%s: Sanitize completed\n", mmc_hostname(host));
1071 EXPORT_SYMBOL_GPL(mmc_sanitize);