2 * Copyright 2008, Freescale Semiconductor, Inc
5 * Based vaguely on the Linux code
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 #include <linux/list.h>
35 /* Set block count limit because of 16 bit register limit on some hardware*/
36 #ifndef CONFIG_SYS_MMC_MAX_BLK_COUNT
37 #define CONFIG_SYS_MMC_MAX_BLK_COUNT 65535
40 static struct list_head mmc_devices;
41 static int cur_dev_num = -1;
43 int __weak board_mmc_getwp(struct mmc *mmc)
48 int mmc_getwp(struct mmc *mmc)
52 wp = board_mmc_getwp(mmc);
64 int __board_mmc_getcd(struct mmc *mmc) {
68 int board_mmc_getcd(struct mmc *mmc)__attribute__((weak,
69 alias("__board_mmc_getcd")));
71 static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
72 struct mmc_data *data)
74 struct mmc_data backup;
77 memset(&backup, 0, sizeof(backup));
79 #ifdef CONFIG_MMC_TRACE
83 printf("CMD_SEND:%d\n", cmd->cmdidx);
84 printf("\t\tARG\t\t\t 0x%08X\n", cmd->cmdarg);
85 ret = mmc->send_cmd(mmc, cmd, data);
86 switch (cmd->resp_type) {
88 printf("\t\tMMC_RSP_NONE\n");
91 printf("\t\tMMC_RSP_R1,5,6,7 \t 0x%08X \n",
95 printf("\t\tMMC_RSP_R1b\t\t 0x%08X \n",
99 printf("\t\tMMC_RSP_R2\t\t 0x%08X \n",
101 printf("\t\t \t\t 0x%08X \n",
103 printf("\t\t \t\t 0x%08X \n",
105 printf("\t\t \t\t 0x%08X \n",
108 printf("\t\t\t\t\tDUMPING DATA\n");
109 for (i = 0; i < 4; i++) {
111 printf("\t\t\t\t\t%03d - ", i*4);
112 ptr = (u8 *)&cmd->response[i];
114 for (j = 0; j < 4; j++)
115 printf("%02X ", *ptr--);
120 printf("\t\tMMC_RSP_R3,4\t\t 0x%08X \n",
124 printf("\t\tERROR MMC rsp not supported\n");
128 ret = mmc->send_cmd(mmc, cmd, data);
133 static int mmc_send_status(struct mmc *mmc, int timeout)
136 int err, retries = 5;
137 #ifdef CONFIG_MMC_TRACE
141 cmd.cmdidx = MMC_CMD_SEND_STATUS;
142 cmd.resp_type = MMC_RSP_R1;
143 if (!mmc_host_is_spi(mmc))
144 cmd.cmdarg = mmc->rca << 16;
147 err = mmc_send_cmd(mmc, &cmd, NULL);
149 if ((cmd.response[0] & MMC_STATUS_RDY_FOR_DATA) &&
150 (cmd.response[0] & MMC_STATUS_CURR_STATE) !=
153 else if (cmd.response[0] & MMC_STATUS_MASK) {
154 printf("Status Error: 0x%08X\n",
158 } else if (--retries < 0)
165 #ifdef CONFIG_MMC_TRACE
166 status = (cmd.response[0] & MMC_STATUS_CURR_STATE) >> 9;
167 printf("CURR STATE:%d\n", status);
170 printf("Timeout waiting card ready\n");
177 static int mmc_set_blocklen(struct mmc *mmc, int len)
181 cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
182 cmd.resp_type = MMC_RSP_R1;
185 return mmc_send_cmd(mmc, &cmd, NULL);
188 struct mmc *find_mmc_device(int dev_num)
191 struct list_head *entry;
193 list_for_each(entry, &mmc_devices) {
194 m = list_entry(entry, struct mmc, link);
196 if (m->block_dev.dev == dev_num)
200 printf("MMC Device %d not found\n", dev_num);
205 static ulong mmc_erase_t(struct mmc *mmc, ulong start, lbaint_t blkcnt)
209 int err, start_cmd, end_cmd;
211 if (mmc->high_capacity)
212 end = start + blkcnt - 1;
214 end = (start + blkcnt - 1) * mmc->write_bl_len;
215 start *= mmc->write_bl_len;
219 start_cmd = SD_CMD_ERASE_WR_BLK_START;
220 end_cmd = SD_CMD_ERASE_WR_BLK_END;
222 start_cmd = MMC_CMD_ERASE_GROUP_START;
223 end_cmd = MMC_CMD_ERASE_GROUP_END;
226 cmd.cmdidx = start_cmd;
228 cmd.resp_type = MMC_RSP_R1;
230 err = mmc_send_cmd(mmc, &cmd, NULL);
234 cmd.cmdidx = end_cmd;
237 err = mmc_send_cmd(mmc, &cmd, NULL);
241 cmd.cmdidx = MMC_CMD_ERASE;
242 cmd.cmdarg = SECURE_ERASE;
243 cmd.resp_type = MMC_RSP_R1b;
245 err = mmc_send_cmd(mmc, &cmd, NULL);
252 puts("mmc erase failed\n");
257 mmc_berase(int dev_num, unsigned long start, lbaint_t blkcnt)
260 struct mmc *mmc = find_mmc_device(dev_num);
261 lbaint_t blk = 0, blk_r = 0;
267 if ((start % mmc->erase_grp_size) || (blkcnt % mmc->erase_grp_size))
268 printf("\n\nCaution! Your devices Erase group is 0x%x\n"
269 "The erase range would be change to 0x%lx~0x%lx\n\n",
270 mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1),
271 ((start + blkcnt + mmc->erase_grp_size)
272 & ~(mmc->erase_grp_size - 1)) - 1);
274 while (blk < blkcnt) {
275 blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ?
276 mmc->erase_grp_size : (blkcnt - blk);
277 err = mmc_erase_t(mmc, start + blk, blk_r);
283 /* Waiting for the ready status */
284 if (mmc_send_status(mmc, timeout))
292 mmc_write_blocks(struct mmc *mmc, ulong start, lbaint_t blkcnt, const void*src)
295 struct mmc_data data;
298 if ((start + blkcnt) > mmc->block_dev.lba) {
299 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
300 start + blkcnt, mmc->block_dev.lba);
306 else if (blkcnt == 1)
307 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
309 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
311 if (mmc->high_capacity)
314 cmd.cmdarg = start * mmc->write_bl_len;
316 cmd.resp_type = MMC_RSP_R1;
319 data.blocks = blkcnt;
320 data.blocksize = mmc->write_bl_len;
321 data.flags = MMC_DATA_WRITE;
323 if (mmc_send_cmd(mmc, &cmd, &data)) {
324 printf("mmc write failed\n");
328 /* SPI multiblock writes terminate using a special
329 * token, not a STOP_TRANSMISSION request.
331 if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
332 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
334 cmd.resp_type = MMC_RSP_R1b;
335 if (mmc_send_cmd(mmc, &cmd, NULL)) {
336 printf("mmc fail to send stop cmd\n");
341 /* Waiting for the ready status */
342 if (mmc_send_status(mmc, timeout))
349 mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
351 lbaint_t cur, blocks_todo = blkcnt;
353 struct mmc *mmc = find_mmc_device(dev_num);
357 if (mmc_set_blocklen(mmc, mmc->write_bl_len))
361 cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo;
362 if(mmc_write_blocks(mmc, start, cur, src) != cur)
366 src += cur * mmc->write_bl_len;
367 } while (blocks_todo > 0);
372 static int mmc_read_blocks(struct mmc *mmc, void *dst, ulong start,
376 struct mmc_data data;
379 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
381 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
383 if (mmc->high_capacity)
386 cmd.cmdarg = start * mmc->read_bl_len;
388 cmd.resp_type = MMC_RSP_R1;
391 data.blocks = blkcnt;
392 data.blocksize = mmc->read_bl_len;
393 data.flags = MMC_DATA_READ;
395 if (mmc_send_cmd(mmc, &cmd, &data))
399 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
401 cmd.resp_type = MMC_RSP_R1b;
402 if (mmc_send_cmd(mmc, &cmd, NULL)) {
403 printf("mmc fail to send stop cmd\n");
411 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
413 lbaint_t cur, blocks_todo = blkcnt;
418 struct mmc *mmc = find_mmc_device(dev_num);
422 if ((start + blkcnt) > mmc->block_dev.lba) {
423 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
424 start + blkcnt, mmc->block_dev.lba);
428 if (mmc_set_blocklen(mmc, mmc->read_bl_len))
432 cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo;
433 if(mmc_read_blocks(mmc, dst, start, cur) != cur)
437 dst += cur * mmc->read_bl_len;
438 } while (blocks_todo > 0);
443 static int mmc_go_idle(struct mmc *mmc)
450 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
452 cmd.resp_type = MMC_RSP_NONE;
454 err = mmc_send_cmd(mmc, &cmd, NULL);
464 static int sd_send_op_cond(struct mmc *mmc)
471 cmd.cmdidx = MMC_CMD_APP_CMD;
472 cmd.resp_type = MMC_RSP_R1;
475 err = mmc_send_cmd(mmc, &cmd, NULL);
480 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
481 cmd.resp_type = MMC_RSP_R3;
484 * Most cards do not answer if some reserved bits
485 * in the ocr are set. However, Some controller
486 * can set bit 7 (reserved for low voltages), but
487 * how to manage low voltages SD card is not yet
490 cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
491 (mmc->voltages & 0xff8000);
493 if (mmc->version == SD_VERSION_2)
494 cmd.cmdarg |= OCR_HCS;
496 err = mmc_send_cmd(mmc, &cmd, NULL);
502 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
507 if (mmc->version != SD_VERSION_2)
508 mmc->version = SD_VERSION_1_0;
510 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
511 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
512 cmd.resp_type = MMC_RSP_R3;
515 err = mmc_send_cmd(mmc, &cmd, NULL);
521 mmc->ocr = cmd.response[0];
523 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
529 /* We pass in the cmd since otherwise the init seems to fail */
530 static int mmc_send_op_cond_iter(struct mmc *mmc, struct mmc_cmd *cmd,
535 cmd->cmdidx = MMC_CMD_SEND_OP_COND;
536 cmd->resp_type = MMC_RSP_R3;
538 if (use_arg && !mmc_host_is_spi(mmc)) {
541 (mmc->op_cond_response & OCR_VOLTAGE_MASK)) |
542 (mmc->op_cond_response & OCR_ACCESS_MODE);
544 if (mmc->host_caps & MMC_MODE_HC)
545 cmd->cmdarg |= OCR_HCS;
547 err = mmc_send_cmd(mmc, cmd, NULL);
550 mmc->op_cond_response = cmd->response[0];
554 int mmc_send_op_cond(struct mmc *mmc)
559 /* Some cards seem to need this */
562 /* Asking to the card its capabilities */
563 mmc->op_cond_pending = 1;
564 for (i = 0; i < 2; i++) {
565 err = mmc_send_op_cond_iter(mmc, &cmd, i != 0);
569 /* exit if not busy (flag seems to be inverted) */
570 if (mmc->op_cond_response & OCR_BUSY)
576 int mmc_complete_op_cond(struct mmc *mmc)
583 mmc->op_cond_pending = 0;
584 start = get_timer(0);
586 err = mmc_send_op_cond_iter(mmc, &cmd, 1);
589 if (get_timer(start) > timeout)
592 } while (!(mmc->op_cond_response & OCR_BUSY));
594 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
595 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
596 cmd.resp_type = MMC_RSP_R3;
599 err = mmc_send_cmd(mmc, &cmd, NULL);
605 mmc->version = MMC_VERSION_UNKNOWN;
606 mmc->ocr = cmd.response[0];
608 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
615 static int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
618 struct mmc_data data;
621 /* Get the Card Status Register */
622 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
623 cmd.resp_type = MMC_RSP_R1;
626 data.dest = (char *)ext_csd;
628 data.blocksize = MMC_MAX_BLOCK_LEN;
629 data.flags = MMC_DATA_READ;
631 err = mmc_send_cmd(mmc, &cmd, &data);
637 static int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
643 cmd.cmdidx = MMC_CMD_SWITCH;
644 cmd.resp_type = MMC_RSP_R1b;
645 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
649 ret = mmc_send_cmd(mmc, &cmd, NULL);
651 /* Waiting for the ready status */
653 ret = mmc_send_status(mmc, timeout);
659 static int mmc_change_freq(struct mmc *mmc)
661 ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
667 if (mmc_host_is_spi(mmc))
670 /* Only version 4 supports high-speed */
671 if (mmc->version < MMC_VERSION_4)
674 err = mmc_send_ext_csd(mmc, ext_csd);
679 cardtype = ext_csd[EXT_CSD_CARD_TYPE] & 0xf;
681 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
686 /* Now check to see that it worked */
687 err = mmc_send_ext_csd(mmc, ext_csd);
692 /* No high-speed support */
693 if (!ext_csd[EXT_CSD_HS_TIMING])
696 /* High Speed is set, there are two types: 52MHz and 26MHz */
697 if (cardtype & MMC_HS_52MHZ)
698 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
700 mmc->card_caps |= MMC_MODE_HS;
705 int mmc_switch_part(int dev_num, unsigned int part_num)
707 struct mmc *mmc = find_mmc_device(dev_num);
712 return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
713 (mmc->part_config & ~PART_ACCESS_MASK)
714 | (part_num & PART_ACCESS_MASK));
717 int mmc_getcd(struct mmc *mmc)
721 cd = board_mmc_getcd(mmc);
725 cd = mmc->getcd(mmc);
733 static int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
736 struct mmc_data data;
738 /* Switch the frequency */
739 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
740 cmd.resp_type = MMC_RSP_R1;
741 cmd.cmdarg = (mode << 31) | 0xffffff;
742 cmd.cmdarg &= ~(0xf << (group * 4));
743 cmd.cmdarg |= value << (group * 4);
745 data.dest = (char *)resp;
748 data.flags = MMC_DATA_READ;
750 return mmc_send_cmd(mmc, &cmd, &data);
754 static int sd_change_freq(struct mmc *mmc)
758 ALLOC_CACHE_ALIGN_BUFFER(uint, scr, 2);
759 ALLOC_CACHE_ALIGN_BUFFER(uint, switch_status, 16);
760 struct mmc_data data;
765 if (mmc_host_is_spi(mmc))
768 /* Read the SCR to find out if this card supports higher speeds */
769 cmd.cmdidx = MMC_CMD_APP_CMD;
770 cmd.resp_type = MMC_RSP_R1;
771 cmd.cmdarg = mmc->rca << 16;
773 err = mmc_send_cmd(mmc, &cmd, NULL);
778 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
779 cmd.resp_type = MMC_RSP_R1;
785 data.dest = (char *)scr;
788 data.flags = MMC_DATA_READ;
790 err = mmc_send_cmd(mmc, &cmd, &data);
799 mmc->scr[0] = __be32_to_cpu(scr[0]);
800 mmc->scr[1] = __be32_to_cpu(scr[1]);
802 switch ((mmc->scr[0] >> 24) & 0xf) {
804 mmc->version = SD_VERSION_1_0;
807 mmc->version = SD_VERSION_1_10;
810 mmc->version = SD_VERSION_2;
811 if ((mmc->scr[0] >> 15) & 0x1)
812 mmc->version = SD_VERSION_3;
815 mmc->version = SD_VERSION_1_0;
819 if (mmc->scr[0] & SD_DATA_4BIT)
820 mmc->card_caps |= MMC_MODE_4BIT;
822 /* Version 1.0 doesn't support switching */
823 if (mmc->version == SD_VERSION_1_0)
828 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
829 (u8 *)switch_status);
834 /* The high-speed function is busy. Try again */
835 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
839 /* If high-speed isn't supported, we return */
840 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
844 * If the host doesn't support SD_HIGHSPEED, do not switch card to
845 * HIGHSPEED mode even if the card support SD_HIGHSPPED.
846 * This can avoid furthur problem when the card runs in different
847 * mode between the host.
849 if (!((mmc->host_caps & MMC_MODE_HS_52MHz) &&
850 (mmc->host_caps & MMC_MODE_HS)))
853 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)switch_status);
858 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
859 mmc->card_caps |= MMC_MODE_HS;
864 /* frequency bases */
865 /* divided by 10 to be nice to platforms without floating point */
866 static const int fbase[] = {
873 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
874 * to platforms without floating point.
876 static const int multipliers[] = {
895 static void mmc_set_ios(struct mmc *mmc)
900 void mmc_set_clock(struct mmc *mmc, uint clock)
902 if (clock > mmc->f_max)
905 if (clock < mmc->f_min)
913 static void mmc_set_bus_width(struct mmc *mmc, uint width)
915 mmc->bus_width = width;
920 static int mmc_startup(struct mmc *mmc)
924 u64 cmult, csize, capacity;
926 ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
927 ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN);
930 #ifdef CONFIG_MMC_SPI_CRC_ON
931 if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
932 cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
933 cmd.resp_type = MMC_RSP_R1;
935 err = mmc_send_cmd(mmc, &cmd, NULL);
942 /* Put the Card in Identify Mode */
943 cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
944 MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
945 cmd.resp_type = MMC_RSP_R2;
948 err = mmc_send_cmd(mmc, &cmd, NULL);
953 memcpy(mmc->cid, cmd.response, 16);
956 * For MMC cards, set the Relative Address.
957 * For SD cards, get the Relatvie Address.
958 * This also puts the cards into Standby State
960 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
961 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
962 cmd.cmdarg = mmc->rca << 16;
963 cmd.resp_type = MMC_RSP_R6;
965 err = mmc_send_cmd(mmc, &cmd, NULL);
971 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
974 /* Get the Card-Specific Data */
975 cmd.cmdidx = MMC_CMD_SEND_CSD;
976 cmd.resp_type = MMC_RSP_R2;
977 cmd.cmdarg = mmc->rca << 16;
979 err = mmc_send_cmd(mmc, &cmd, NULL);
981 /* Waiting for the ready status */
982 mmc_send_status(mmc, timeout);
987 mmc->csd[0] = cmd.response[0];
988 mmc->csd[1] = cmd.response[1];
989 mmc->csd[2] = cmd.response[2];
990 mmc->csd[3] = cmd.response[3];
992 if (mmc->version == MMC_VERSION_UNKNOWN) {
993 int version = (cmd.response[0] >> 26) & 0xf;
997 mmc->version = MMC_VERSION_1_2;
1000 mmc->version = MMC_VERSION_1_4;
1003 mmc->version = MMC_VERSION_2_2;
1006 mmc->version = MMC_VERSION_3;
1009 mmc->version = MMC_VERSION_4;
1012 mmc->version = MMC_VERSION_1_2;
1017 /* divide frequency by 10, since the mults are 10x bigger */
1018 freq = fbase[(cmd.response[0] & 0x7)];
1019 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
1021 mmc->tran_speed = freq * mult;
1023 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
1026 mmc->write_bl_len = mmc->read_bl_len;
1028 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
1030 if (mmc->high_capacity) {
1031 csize = (mmc->csd[1] & 0x3f) << 16
1032 | (mmc->csd[2] & 0xffff0000) >> 16;
1035 csize = (mmc->csd[1] & 0x3ff) << 2
1036 | (mmc->csd[2] & 0xc0000000) >> 30;
1037 cmult = (mmc->csd[2] & 0x00038000) >> 15;
1040 mmc->capacity = (csize + 1) << (cmult + 2);
1041 mmc->capacity *= mmc->read_bl_len;
1043 if (mmc->read_bl_len > MMC_MAX_BLOCK_LEN)
1044 mmc->read_bl_len = MMC_MAX_BLOCK_LEN;
1046 if (mmc->write_bl_len > MMC_MAX_BLOCK_LEN)
1047 mmc->write_bl_len = MMC_MAX_BLOCK_LEN;
1049 /* Select the card, and put it into Transfer Mode */
1050 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
1051 cmd.cmdidx = MMC_CMD_SELECT_CARD;
1052 cmd.resp_type = MMC_RSP_R1;
1053 cmd.cmdarg = mmc->rca << 16;
1054 err = mmc_send_cmd(mmc, &cmd, NULL);
1061 * For SD, its erase group is always one sector
1063 mmc->erase_grp_size = 1;
1064 mmc->part_config = MMCPART_NOAVAILABLE;
1065 if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
1066 /* check ext_csd version and capacity */
1067 err = mmc_send_ext_csd(mmc, ext_csd);
1068 if (!err && (ext_csd[EXT_CSD_REV] >= 2)) {
1070 * According to the JEDEC Standard, the value of
1071 * ext_csd's capacity is valid if the value is more
1074 capacity = ext_csd[EXT_CSD_SEC_CNT] << 0
1075 | ext_csd[EXT_CSD_SEC_CNT + 1] << 8
1076 | ext_csd[EXT_CSD_SEC_CNT + 2] << 16
1077 | ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
1078 capacity *= MMC_MAX_BLOCK_LEN;
1079 if ((capacity >> 20) > 2 * 1024)
1080 mmc->capacity = capacity;
1083 switch (ext_csd[EXT_CSD_REV]) {
1085 mmc->version = MMC_VERSION_4_1;
1088 mmc->version = MMC_VERSION_4_2;
1091 mmc->version = MMC_VERSION_4_3;
1094 mmc->version = MMC_VERSION_4_41;
1097 mmc->version = MMC_VERSION_4_5;
1102 * Check whether GROUP_DEF is set, if yes, read out
1103 * group size from ext_csd directly, or calculate
1104 * the group size from the csd value.
1106 if (ext_csd[EXT_CSD_ERASE_GROUP_DEF]) {
1107 mmc->erase_grp_size =
1108 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] *
1109 MMC_MAX_BLOCK_LEN * 1024;
1111 int erase_gsz, erase_gmul;
1112 erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10;
1113 erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5;
1114 mmc->erase_grp_size = (erase_gsz + 1)
1118 /* store the partition info of emmc */
1119 if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) ||
1120 ext_csd[EXT_CSD_BOOT_MULT])
1121 mmc->part_config = ext_csd[EXT_CSD_PART_CONF];
1125 err = sd_change_freq(mmc);
1127 err = mmc_change_freq(mmc);
1132 /* Restrict card's capabilities by what the host can do */
1133 mmc->card_caps &= mmc->host_caps;
1136 if (mmc->card_caps & MMC_MODE_4BIT) {
1137 cmd.cmdidx = MMC_CMD_APP_CMD;
1138 cmd.resp_type = MMC_RSP_R1;
1139 cmd.cmdarg = mmc->rca << 16;
1141 err = mmc_send_cmd(mmc, &cmd, NULL);
1145 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
1146 cmd.resp_type = MMC_RSP_R1;
1148 err = mmc_send_cmd(mmc, &cmd, NULL);
1152 mmc_set_bus_width(mmc, 4);
1155 if (mmc->card_caps & MMC_MODE_HS)
1156 mmc->tran_speed = 50000000;
1158 mmc->tran_speed = 25000000;
1162 /* An array of possible bus widths in order of preference */
1163 static unsigned ext_csd_bits[] = {
1164 EXT_CSD_BUS_WIDTH_8,
1165 EXT_CSD_BUS_WIDTH_4,
1166 EXT_CSD_BUS_WIDTH_1,
1169 /* An array to map CSD bus widths to host cap bits */
1170 static unsigned ext_to_hostcaps[] = {
1171 [EXT_CSD_BUS_WIDTH_4] = MMC_MODE_4BIT,
1172 [EXT_CSD_BUS_WIDTH_8] = MMC_MODE_8BIT,
1175 /* An array to map chosen bus width to an integer */
1176 static unsigned widths[] = {
1180 for (idx=0; idx < ARRAY_SIZE(ext_csd_bits); idx++) {
1181 unsigned int extw = ext_csd_bits[idx];
1184 * Check to make sure the controller supports
1185 * this bus width, if it's more than 1
1187 if (extw != EXT_CSD_BUS_WIDTH_1 &&
1188 !(mmc->host_caps & ext_to_hostcaps[extw]))
1191 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1192 EXT_CSD_BUS_WIDTH, extw);
1197 mmc_set_bus_width(mmc, widths[idx]);
1199 err = mmc_send_ext_csd(mmc, test_csd);
1200 if (!err && ext_csd[EXT_CSD_PARTITIONING_SUPPORT] \
1201 == test_csd[EXT_CSD_PARTITIONING_SUPPORT]
1202 && ext_csd[EXT_CSD_ERASE_GROUP_DEF] \
1203 == test_csd[EXT_CSD_ERASE_GROUP_DEF] \
1204 && ext_csd[EXT_CSD_REV] \
1205 == test_csd[EXT_CSD_REV]
1206 && ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] \
1207 == test_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
1208 && memcmp(&ext_csd[EXT_CSD_SEC_CNT], \
1209 &test_csd[EXT_CSD_SEC_CNT], 4) == 0) {
1211 mmc->card_caps |= ext_to_hostcaps[extw];
1216 if (mmc->card_caps & MMC_MODE_HS) {
1217 if (mmc->card_caps & MMC_MODE_HS_52MHz)
1218 mmc->tran_speed = 52000000;
1220 mmc->tran_speed = 26000000;
1224 mmc_set_clock(mmc, mmc->tran_speed);
1226 /* fill in device description */
1227 mmc->block_dev.lun = 0;
1228 mmc->block_dev.type = 0;
1229 mmc->block_dev.blksz = mmc->read_bl_len;
1230 mmc->block_dev.log2blksz = LOG2(mmc->block_dev.blksz);
1231 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
1232 sprintf(mmc->block_dev.vendor, "Man %06x Snr %04x%04x",
1233 mmc->cid[0] >> 24, (mmc->cid[2] & 0xffff),
1234 (mmc->cid[3] >> 16) & 0xffff);
1235 sprintf(mmc->block_dev.product, "%c%c%c%c%c%c", mmc->cid[0] & 0xff,
1236 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
1237 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff,
1238 (mmc->cid[2] >> 24) & 0xff);
1239 sprintf(mmc->block_dev.revision, "%d.%d", (mmc->cid[2] >> 20) & 0xf,
1240 (mmc->cid[2] >> 16) & 0xf);
1241 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBDISK_SUPPORT)
1242 init_part(&mmc->block_dev);
1248 static int mmc_send_if_cond(struct mmc *mmc)
1253 cmd.cmdidx = SD_CMD_SEND_IF_COND;
1254 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
1255 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
1256 cmd.resp_type = MMC_RSP_R7;
1258 err = mmc_send_cmd(mmc, &cmd, NULL);
1263 if ((cmd.response[0] & 0xff) != 0xaa)
1264 return UNUSABLE_ERR;
1266 mmc->version = SD_VERSION_2;
1271 int mmc_register(struct mmc *mmc)
1273 /* Setup the universal parts of the block interface just once */
1274 mmc->block_dev.if_type = IF_TYPE_MMC;
1275 mmc->block_dev.dev = cur_dev_num++;
1276 mmc->block_dev.removable = 1;
1277 mmc->block_dev.block_read = mmc_bread;
1278 mmc->block_dev.block_write = mmc_bwrite;
1279 mmc->block_dev.block_erase = mmc_berase;
1281 mmc->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
1283 INIT_LIST_HEAD (&mmc->link);
1285 list_add_tail (&mmc->link, &mmc_devices);
1290 #ifdef CONFIG_PARTITIONS
1291 block_dev_desc_t *mmc_get_dev(int dev)
1293 struct mmc *mmc = find_mmc_device(dev);
1294 if (!mmc || mmc_init(mmc))
1297 return &mmc->block_dev;
1301 int mmc_start_init(struct mmc *mmc)
1305 if (mmc_getcd(mmc) == 0) {
1307 printf("MMC: no card present\n");
1314 err = mmc->init(mmc);
1319 mmc_set_bus_width(mmc, 1);
1320 mmc_set_clock(mmc, 1);
1322 /* Reset the Card */
1323 err = mmc_go_idle(mmc);
1328 /* The internal partition reset to user partition(0) at every CMD0*/
1331 /* Test for SD version 2 */
1332 err = mmc_send_if_cond(mmc);
1334 /* Now try to get the SD card's operating condition */
1335 err = sd_send_op_cond(mmc);
1337 /* If the command timed out, we check for an MMC card */
1338 if (err == TIMEOUT) {
1339 err = mmc_send_op_cond(mmc);
1341 if (err && err != IN_PROGRESS) {
1342 printf("Card did not respond to voltage select!\n");
1343 return UNUSABLE_ERR;
1347 if (err == IN_PROGRESS)
1348 mmc->init_in_progress = 1;
1353 static int mmc_complete_init(struct mmc *mmc)
1357 if (mmc->op_cond_pending)
1358 err = mmc_complete_op_cond(mmc);
1361 err = mmc_startup(mmc);
1366 mmc->init_in_progress = 0;
1370 int mmc_init(struct mmc *mmc)
1372 int err = IN_PROGRESS;
1373 unsigned start = get_timer(0);
1377 if (!mmc->init_in_progress)
1378 err = mmc_start_init(mmc);
1380 if (!err || err == IN_PROGRESS)
1381 err = mmc_complete_init(mmc);
1382 debug("%s: %d, time %lu\n", __func__, err, get_timer(start));
1387 * CPU and board-specific MMC initializations. Aliased function
1388 * signals caller to move on
1390 static int __def_mmc_init(bd_t *bis)
1395 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1396 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1398 void print_mmc_devices(char separator)
1401 struct list_head *entry;
1403 list_for_each(entry, &mmc_devices) {
1404 m = list_entry(entry, struct mmc, link);
1406 printf("%s: %d", m->name, m->block_dev.dev);
1408 if (entry->next != &mmc_devices)
1409 printf("%c ", separator);
1415 int get_mmc_num(void)
1420 void mmc_set_preinit(struct mmc *mmc, int preinit)
1422 mmc->preinit = preinit;
1425 static void do_preinit(void)
1428 struct list_head *entry;
1430 list_for_each(entry, &mmc_devices) {
1431 m = list_entry(entry, struct mmc, link);
1439 int mmc_initialize(bd_t *bis)
1441 INIT_LIST_HEAD (&mmc_devices);
1444 if (board_mmc_init(bis) < 0)
1447 print_mmc_devices(',');