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 */
25 static const u8 tuning_blk_pattern_4bit[] = {
26 0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
27 0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
28 0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb,
29 0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef,
30 0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c,
31 0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee,
32 0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff,
33 0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
36 static const u8 tuning_blk_pattern_8bit[] = {
37 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
38 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
39 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
40 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
41 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
42 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
43 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
44 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
45 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
46 0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
47 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
48 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
49 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
50 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
51 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
52 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
55 struct mmc_busy_data {
56 struct mmc_card *card;
58 enum mmc_busy_cmd busy_cmd;
61 struct mmc_op_cond_busy_data {
62 struct mmc_host *host;
64 struct mmc_command *cmd;
67 int __mmc_send_status(struct mmc_card *card, u32 *status, unsigned int retries)
70 struct mmc_command cmd = {};
72 cmd.opcode = MMC_SEND_STATUS;
73 if (!mmc_host_is_spi(card->host))
74 cmd.arg = card->rca << 16;
75 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
77 err = mmc_wait_for_cmd(card->host, &cmd, retries);
81 /* NOTE: callers are required to understand the difference
82 * between "native" and SPI format status words!
85 *status = cmd.resp[0];
89 EXPORT_SYMBOL_GPL(__mmc_send_status);
91 int mmc_send_status(struct mmc_card *card, u32 *status)
93 return __mmc_send_status(card, status, MMC_CMD_RETRIES);
95 EXPORT_SYMBOL_GPL(mmc_send_status);
97 static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
99 struct mmc_command cmd = {};
101 cmd.opcode = MMC_SELECT_CARD;
104 cmd.arg = card->rca << 16;
105 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
108 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
111 return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
114 int mmc_select_card(struct mmc_card *card)
117 return _mmc_select_card(card->host, card);
120 int mmc_deselect_cards(struct mmc_host *host)
122 return _mmc_select_card(host, NULL);
126 * Write the value specified in the device tree or board code into the optional
127 * 16 bit Driver Stage Register. This can be used to tune raise/fall times and
128 * drive strength of the DAT and CMD outputs. The actual meaning of a given
129 * value is hardware dependant.
130 * The presence of the DSR register can be determined from the CSD register,
133 int mmc_set_dsr(struct mmc_host *host)
135 struct mmc_command cmd = {};
137 cmd.opcode = MMC_SET_DSR;
139 cmd.arg = (host->dsr << 16) | 0xffff;
140 cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
142 return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
145 int mmc_go_idle(struct mmc_host *host)
148 struct mmc_command cmd = {};
151 * Non-SPI hosts need to prevent chipselect going active during
152 * GO_IDLE; that would put chips into SPI mode. Remind them of
153 * that in case of hardware that won't pull up DAT3/nCS otherwise.
155 * SPI hosts ignore ios.chip_select; it's managed according to
156 * rules that must accommodate non-MMC slaves which this layer
157 * won't even know about.
159 if (!mmc_host_is_spi(host)) {
160 mmc_set_chip_select(host, MMC_CS_HIGH);
164 cmd.opcode = MMC_GO_IDLE_STATE;
166 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
168 err = mmc_wait_for_cmd(host, &cmd, 0);
172 if (!mmc_host_is_spi(host)) {
173 mmc_set_chip_select(host, MMC_CS_DONTCARE);
177 host->use_spi_crc = 0;
182 static int __mmc_send_op_cond_cb(void *cb_data, bool *busy)
184 struct mmc_op_cond_busy_data *data = cb_data;
185 struct mmc_host *host = data->host;
186 struct mmc_command *cmd = data->cmd;
190 err = mmc_wait_for_cmd(host, cmd, 0);
194 if (mmc_host_is_spi(host)) {
195 if (!(cmd->resp[0] & R1_SPI_IDLE)) {
200 if (cmd->resp[0] & MMC_CARD_BUSY) {
209 * According to eMMC specification v5.1 section 6.4.3, we
210 * should issue CMD1 repeatedly in the idle state until
211 * the eMMC is ready. Otherwise some eMMC devices seem to enter
212 * the inactive mode after mmc_init_card() issued CMD0 when
213 * the eMMC device is busy.
215 if (!ocr && !mmc_host_is_spi(host))
216 cmd->arg = cmd->resp[0] | BIT(30);
221 int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
223 struct mmc_command cmd = {};
225 struct mmc_op_cond_busy_data cb_data = {
231 cmd.opcode = MMC_SEND_OP_COND;
232 cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
233 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
235 err = __mmc_poll_for_busy(host, 1000, &__mmc_send_op_cond_cb, &cb_data);
239 if (rocr && !mmc_host_is_spi(host))
245 int mmc_set_relative_addr(struct mmc_card *card)
247 struct mmc_command cmd = {};
249 cmd.opcode = MMC_SET_RELATIVE_ADDR;
250 cmd.arg = card->rca << 16;
251 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
253 return mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
257 mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
260 struct mmc_command cmd = {};
264 cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
266 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
270 memcpy(cxd, cmd.resp, sizeof(u32) * 4);
276 * NOTE: void *buf, caller for the buf is required to use DMA-capable
277 * buffer or on-stack buffer (with some overhead in callee).
279 int mmc_send_adtc_data(struct mmc_card *card, struct mmc_host *host, u32 opcode,
280 u32 args, void *buf, unsigned len)
282 struct mmc_request mrq = {};
283 struct mmc_command cmd = {};
284 struct mmc_data data = {};
285 struct scatterlist sg;
293 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
294 * rely on callers to never use this with "native" calls for reading
295 * CSD or CID. Native versions of those commands use the R2 type,
296 * not R1 plus a data block.
298 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
302 data.flags = MMC_DATA_READ;
306 sg_init_one(&sg, buf, len);
308 if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) {
310 * The spec states that CSR and CID accesses have a timeout
311 * of 64 clock cycles.
314 data.timeout_clks = 64;
316 mmc_set_data_timeout(&data, card);
318 mmc_wait_for_req(host, &mrq);
328 static int mmc_spi_send_cxd(struct mmc_host *host, u32 *cxd, u32 opcode)
333 cxd_tmp = kzalloc(16, GFP_KERNEL);
337 ret = mmc_send_adtc_data(NULL, host, opcode, 0, cxd_tmp, 16);
341 for (i = 0; i < 4; i++)
342 cxd[i] = be32_to_cpu(cxd_tmp[i]);
349 int mmc_send_csd(struct mmc_card *card, u32 *csd)
351 if (mmc_host_is_spi(card->host))
352 return mmc_spi_send_cxd(card->host, csd, MMC_SEND_CSD);
354 return mmc_send_cxd_native(card->host, card->rca << 16, csd,
358 int mmc_send_cid(struct mmc_host *host, u32 *cid)
360 if (mmc_host_is_spi(host))
361 return mmc_spi_send_cxd(host, cid, MMC_SEND_CID);
363 return mmc_send_cxd_native(host, 0, cid, MMC_ALL_SEND_CID);
366 int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
371 if (!card || !new_ext_csd)
374 if (!mmc_can_ext_csd(card))
378 * As the ext_csd is so large and mostly unused, we don't store the
379 * raw block in mmc_card.
381 ext_csd = kzalloc(512, GFP_KERNEL);
385 err = mmc_send_adtc_data(card, card->host, MMC_SEND_EXT_CSD, 0, ext_csd,
390 *new_ext_csd = ext_csd;
394 EXPORT_SYMBOL_GPL(mmc_get_ext_csd);
396 int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
398 struct mmc_command cmd = {};
401 cmd.opcode = MMC_SPI_READ_OCR;
402 cmd.arg = highcap ? (1 << 30) : 0;
403 cmd.flags = MMC_RSP_SPI_R3;
405 err = mmc_wait_for_cmd(host, &cmd, 0);
411 int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
413 struct mmc_command cmd = {};
416 cmd.opcode = MMC_SPI_CRC_ON_OFF;
417 cmd.flags = MMC_RSP_SPI_R1;
420 err = mmc_wait_for_cmd(host, &cmd, 0);
422 host->use_spi_crc = use_crc;
426 static int mmc_switch_status_error(struct mmc_host *host, u32 status)
428 if (mmc_host_is_spi(host)) {
429 if (status & R1_SPI_ILLEGAL_COMMAND)
432 if (R1_STATUS(status))
433 pr_warn("%s: unexpected status %#x after switch\n",
434 mmc_hostname(host), status);
435 if (status & R1_SWITCH_ERROR)
441 /* Caller must hold re-tuning */
442 int mmc_switch_status(struct mmc_card *card, bool crc_err_fatal)
447 err = mmc_send_status(card, &status);
448 if (!crc_err_fatal && err == -EILSEQ)
453 return mmc_switch_status_error(card->host, status);
456 static int mmc_busy_cb(void *cb_data, bool *busy)
458 struct mmc_busy_data *data = cb_data;
459 struct mmc_host *host = data->card->host;
463 if (data->busy_cmd != MMC_BUSY_IO && host->ops->card_busy) {
464 *busy = host->ops->card_busy(host);
468 err = mmc_send_status(data->card, &status);
469 if (data->retry_crc_err && err == -EILSEQ) {
476 switch (data->busy_cmd) {
478 err = mmc_switch_status_error(host, status);
481 err = R1_STATUS(status) ? -EIO : 0;
484 case MMC_BUSY_EXTR_SINGLE:
494 *busy = !mmc_ready_for_data(status);
498 int __mmc_poll_for_busy(struct mmc_host *host, unsigned int timeout_ms,
499 int (*busy_cb)(void *cb_data, bool *busy),
503 unsigned long timeout;
504 unsigned int udelay = 32, udelay_max = 32768;
505 bool expired = false;
508 timeout = jiffies + msecs_to_jiffies(timeout_ms) + 1;
511 * Due to the possibility of being preempted while polling,
512 * check the expiration time first.
514 expired = time_after(jiffies, timeout);
516 err = (*busy_cb)(cb_data, &busy);
520 /* Timeout if the device still remains busy. */
521 if (expired && busy) {
522 pr_err("%s: Card stuck being busy! %s\n",
523 mmc_hostname(host), __func__);
527 /* Throttle the polling rate to avoid hogging the CPU. */
529 usleep_range(udelay, udelay * 2);
530 if (udelay < udelay_max)
537 EXPORT_SYMBOL_GPL(__mmc_poll_for_busy);
539 int mmc_poll_for_busy(struct mmc_card *card, unsigned int timeout_ms,
540 bool retry_crc_err, enum mmc_busy_cmd busy_cmd)
542 struct mmc_host *host = card->host;
543 struct mmc_busy_data cb_data;
546 cb_data.retry_crc_err = retry_crc_err;
547 cb_data.busy_cmd = busy_cmd;
549 return __mmc_poll_for_busy(host, timeout_ms, &mmc_busy_cb, &cb_data);
551 EXPORT_SYMBOL_GPL(mmc_poll_for_busy);
553 bool mmc_prepare_busy_cmd(struct mmc_host *host, struct mmc_command *cmd,
554 unsigned int timeout_ms)
557 * If the max_busy_timeout of the host is specified, make sure it's
558 * enough to fit the used timeout_ms. In case it's not, let's instruct
559 * the host to avoid HW busy detection, by converting to a R1 response
560 * instead of a R1B. Note, some hosts requires R1B, which also means
561 * they are on their own when it comes to deal with the busy timeout.
563 if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && host->max_busy_timeout &&
564 (timeout_ms > host->max_busy_timeout)) {
565 cmd->flags = MMC_CMD_AC | MMC_RSP_SPI_R1 | MMC_RSP_R1;
569 cmd->flags = MMC_CMD_AC | MMC_RSP_SPI_R1B | MMC_RSP_R1B;
570 cmd->busy_timeout = timeout_ms;
575 * __mmc_switch - modify EXT_CSD register
576 * @card: the MMC card associated with the data transfer
577 * @set: cmd set values
578 * @index: EXT_CSD register index
579 * @value: value to program into EXT_CSD register
580 * @timeout_ms: timeout (ms) for operation performed by register write,
581 * timeout of zero implies maximum possible timeout
582 * @timing: new timing to change to
583 * @send_status: send status cmd to poll for busy
584 * @retry_crc_err: retry when CRC errors when polling with CMD13 for busy
585 * @retries: number of retries
587 * Modifies the EXT_CSD register for selected card.
589 int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
590 unsigned int timeout_ms, unsigned char timing,
591 bool send_status, bool retry_crc_err, unsigned int retries)
593 struct mmc_host *host = card->host;
595 struct mmc_command cmd = {};
597 unsigned char old_timing = host->ios.timing;
599 mmc_retune_hold(host);
602 pr_warn("%s: unspecified timeout for CMD6 - use generic\n",
604 timeout_ms = card->ext_csd.generic_cmd6_time;
607 cmd.opcode = MMC_SWITCH;
608 cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
612 use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd, timeout_ms);
614 err = mmc_wait_for_cmd(host, &cmd, retries);
618 /*If SPI or used HW busy detection above, then we don't need to poll. */
619 if (((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp) ||
620 mmc_host_is_spi(host))
624 * If the host doesn't support HW polling via the ->card_busy() ops and
625 * when it's not allowed to poll by using CMD13, then we need to rely on
626 * waiting the stated timeout to be sufficient.
628 if (!send_status && !host->ops->card_busy) {
629 mmc_delay(timeout_ms);
633 /* Let's try to poll to find out when the command is completed. */
634 err = mmc_poll_for_busy(card, timeout_ms, retry_crc_err, MMC_BUSY_CMD6);
639 /* Switch to new timing before check switch status. */
641 mmc_set_timing(host, timing);
644 err = mmc_switch_status(card, true);
646 mmc_set_timing(host, old_timing);
649 mmc_retune_release(host);
654 int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
655 unsigned int timeout_ms)
657 return __mmc_switch(card, set, index, value, timeout_ms, 0,
658 true, false, MMC_CMD_RETRIES);
660 EXPORT_SYMBOL_GPL(mmc_switch);
662 int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error)
664 struct mmc_request mrq = {};
665 struct mmc_command cmd = {};
666 struct mmc_data data = {};
667 struct scatterlist sg;
668 struct mmc_ios *ios = &host->ios;
669 const u8 *tuning_block_pattern;
673 if (ios->bus_width == MMC_BUS_WIDTH_8) {
674 tuning_block_pattern = tuning_blk_pattern_8bit;
675 size = sizeof(tuning_blk_pattern_8bit);
676 } else if (ios->bus_width == MMC_BUS_WIDTH_4) {
677 tuning_block_pattern = tuning_blk_pattern_4bit;
678 size = sizeof(tuning_blk_pattern_4bit);
682 data_buf = kzalloc(size, GFP_KERNEL);
690 cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
694 data.flags = MMC_DATA_READ;
697 * According to the tuning specs, Tuning process
698 * is normally shorter 40 executions of CMD19,
699 * and timeout value should be shorter than 150 ms
701 data.timeout_ns = 150 * NSEC_PER_MSEC;
705 sg_init_one(&sg, data_buf, size);
707 mmc_wait_for_req(host, &mrq);
710 *cmd_error = cmd.error;
722 if (memcmp(data_buf, tuning_block_pattern, size))
729 EXPORT_SYMBOL_GPL(mmc_send_tuning);
731 int mmc_send_abort_tuning(struct mmc_host *host, u32 opcode)
733 struct mmc_command cmd = {};
736 * eMMC specification specifies that CMD12 can be used to stop a tuning
737 * command, but SD specification does not, so do nothing unless it is
740 if (opcode != MMC_SEND_TUNING_BLOCK_HS200)
743 cmd.opcode = MMC_STOP_TRANSMISSION;
744 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
747 * For drivers that override R1 to R1b, set an arbitrary timeout based
748 * on the tuning timeout i.e. 150ms.
750 cmd.busy_timeout = 150;
752 return mmc_wait_for_cmd(host, &cmd, 0);
754 EXPORT_SYMBOL_GPL(mmc_send_abort_tuning);
757 mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
760 struct mmc_request mrq = {};
761 struct mmc_command cmd = {};
762 struct mmc_data data = {};
763 struct scatterlist sg;
767 static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 };
768 static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 };
770 /* dma onto stack is unsafe/nonportable, but callers to this
771 * routine normally provide temporary on-stack buffers ...
773 data_buf = kmalloc(len, GFP_KERNEL);
778 test_buf = testdata_8bit;
780 test_buf = testdata_4bit;
782 pr_err("%s: Invalid bus_width %d\n",
783 mmc_hostname(host), len);
788 if (opcode == MMC_BUS_TEST_W)
789 memcpy(data_buf, test_buf, len);
796 /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
797 * rely on callers to never use this with "native" calls for reading
798 * CSD or CID. Native versions of those commands use the R2 type,
799 * not R1 plus a data block.
801 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
805 if (opcode == MMC_BUS_TEST_R)
806 data.flags = MMC_DATA_READ;
808 data.flags = MMC_DATA_WRITE;
812 mmc_set_data_timeout(&data, card);
813 sg_init_one(&sg, data_buf, len);
814 mmc_wait_for_req(host, &mrq);
816 if (opcode == MMC_BUS_TEST_R) {
817 for (i = 0; i < len / 4; i++)
818 if ((test_buf[i] ^ data_buf[i]) != 0xff) {
833 int mmc_bus_test(struct mmc_card *card, u8 bus_width)
837 if (bus_width == MMC_BUS_WIDTH_8)
839 else if (bus_width == MMC_BUS_WIDTH_4)
841 else if (bus_width == MMC_BUS_WIDTH_1)
842 return 0; /* no need for test */
847 * Ignore errors from BUS_TEST_W. BUS_TEST_R will fail if there
848 * is a problem. This improves chances that the test will work.
850 mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width);
851 return mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width);
854 static int mmc_send_hpi_cmd(struct mmc_card *card)
856 unsigned int busy_timeout_ms = card->ext_csd.out_of_int_time;
857 struct mmc_host *host = card->host;
858 bool use_r1b_resp = false;
859 struct mmc_command cmd = {};
862 cmd.opcode = card->ext_csd.hpi_cmd;
863 cmd.arg = card->rca << 16 | 1;
864 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
866 if (cmd.opcode == MMC_STOP_TRANSMISSION)
867 use_r1b_resp = mmc_prepare_busy_cmd(host, &cmd,
870 err = mmc_wait_for_cmd(host, &cmd, 0);
872 pr_warn("%s: HPI error %d. Command response %#x\n",
873 mmc_hostname(host), err, cmd.resp[0]);
877 /* No need to poll when using HW busy detection. */
878 if (host->caps & MMC_CAP_WAIT_WHILE_BUSY && use_r1b_resp)
881 /* Let's poll to find out when the HPI request completes. */
882 return mmc_poll_for_busy(card, busy_timeout_ms, false, MMC_BUSY_HPI);
886 * mmc_interrupt_hpi - Issue for High priority Interrupt
887 * @card: the MMC card associated with the HPI transfer
889 * Issued High Priority Interrupt, and check for card status
890 * until out-of prg-state.
892 static int mmc_interrupt_hpi(struct mmc_card *card)
897 if (!card->ext_csd.hpi_en) {
898 pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host));
902 err = mmc_send_status(card, &status);
904 pr_err("%s: Get card status fail\n", mmc_hostname(card->host));
908 switch (R1_CURRENT_STATE(status)) {
914 * In idle and transfer states, HPI is not needed and the caller
915 * can issue the next intended command immediately
921 /* In all other states, it's illegal to issue HPI */
922 pr_debug("%s: HPI cannot be sent. Card state=%d\n",
923 mmc_hostname(card->host), R1_CURRENT_STATE(status));
928 err = mmc_send_hpi_cmd(card);
933 int mmc_can_ext_csd(struct mmc_card *card)
935 return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);
938 static int mmc_read_bkops_status(struct mmc_card *card)
943 err = mmc_get_ext_csd(card, &ext_csd);
947 card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS];
948 card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS];
954 * mmc_run_bkops - Run BKOPS for supported cards
955 * @card: MMC card to run BKOPS for
957 * Run background operations synchronously for cards having manual BKOPS
958 * enabled and in case it reports urgent BKOPS level.
960 void mmc_run_bkops(struct mmc_card *card)
964 if (!card->ext_csd.man_bkops_en)
967 err = mmc_read_bkops_status(card);
969 pr_err("%s: Failed to read bkops status: %d\n",
970 mmc_hostname(card->host), err);
974 if (!card->ext_csd.raw_bkops_status ||
975 card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2)
978 mmc_retune_hold(card->host);
981 * For urgent BKOPS status, LEVEL_2 and higher, let's execute
982 * synchronously. Future wise, we may consider to start BKOPS, for less
983 * urgent levels by using an asynchronous background task, when idle.
985 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
986 EXT_CSD_BKOPS_START, 1, MMC_BKOPS_TIMEOUT_MS);
988 * If the BKOPS timed out, the card is probably still busy in the
989 * R1_STATE_PRG. Rather than continue to wait, let's try to abort
990 * it with a HPI command to get back into R1_STATE_TRAN.
992 if (err == -ETIMEDOUT && !mmc_interrupt_hpi(card))
993 pr_warn("%s: BKOPS aborted\n", mmc_hostname(card->host));
995 pr_warn("%s: Error %d running bkops\n",
996 mmc_hostname(card->host), err);
998 mmc_retune_release(card->host);
1000 EXPORT_SYMBOL(mmc_run_bkops);
1002 static int mmc_cmdq_switch(struct mmc_card *card, bool enable)
1004 u8 val = enable ? EXT_CSD_CMDQ_MODE_ENABLED : 0;
1007 if (!card->ext_csd.cmdq_support)
1010 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_CMDQ_MODE_EN,
1011 val, card->ext_csd.generic_cmd6_time);
1013 card->ext_csd.cmdq_en = enable;
1018 int mmc_cmdq_enable(struct mmc_card *card)
1020 return mmc_cmdq_switch(card, true);
1022 EXPORT_SYMBOL_GPL(mmc_cmdq_enable);
1024 int mmc_cmdq_disable(struct mmc_card *card)
1026 return mmc_cmdq_switch(card, false);
1028 EXPORT_SYMBOL_GPL(mmc_cmdq_disable);
1030 int mmc_sanitize(struct mmc_card *card, unsigned int timeout_ms)
1032 struct mmc_host *host = card->host;
1035 if (!mmc_can_sanitize(card)) {
1036 pr_warn("%s: Sanitize not supported\n", mmc_hostname(host));
1041 timeout_ms = MMC_SANITIZE_TIMEOUT_MS;
1043 pr_debug("%s: Sanitize in progress...\n", mmc_hostname(host));
1045 mmc_retune_hold(host);
1047 err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_SANITIZE_START,
1048 1, timeout_ms, 0, true, false, 0);
1050 pr_err("%s: Sanitize failed err=%d\n", mmc_hostname(host), err);
1053 * If the sanitize operation timed out, the card is probably still busy
1054 * in the R1_STATE_PRG. Rather than continue to wait, let's try to abort
1055 * it with a HPI command to get back into R1_STATE_TRAN.
1057 if (err == -ETIMEDOUT && !mmc_interrupt_hpi(card))
1058 pr_warn("%s: Sanitize aborted\n", mmc_hostname(host));
1060 mmc_retune_release(host);
1062 pr_debug("%s: Sanitize completed\n", mmc_hostname(host));
1065 EXPORT_SYMBOL_GPL(mmc_sanitize);