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 __board_mmc_getcd(struct mmc *mmc) {
47 int board_mmc_getcd(struct mmc *mmc)__attribute__((weak,
48 alias("__board_mmc_getcd")));
50 int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
52 #ifdef CONFIG_MMC_TRACE
57 printf("CMD_SEND:%d\n", cmd->cmdidx);
58 printf("\t\tARG\t\t\t 0x%08X\n", cmd->cmdarg);
59 printf("\t\tFLAG\t\t\t %d\n", cmd->flags);
60 ret = mmc->send_cmd(mmc, cmd, data);
61 switch (cmd->resp_type) {
63 printf("\t\tMMC_RSP_NONE\n");
66 printf("\t\tMMC_RSP_R1,5,6,7 \t 0x%08X \n",
70 printf("\t\tMMC_RSP_R1b\t\t 0x%08X \n",
74 printf("\t\tMMC_RSP_R2\t\t 0x%08X \n",
76 printf("\t\t \t\t 0x%08X \n",
78 printf("\t\t \t\t 0x%08X \n",
80 printf("\t\t \t\t 0x%08X \n",
83 printf("\t\t\t\t\tDUMPING DATA\n");
84 for (i = 0; i < 4; i++) {
86 printf("\t\t\t\t\t%03d - ", i*4);
87 ptr = &cmd->response[i];
89 for (j = 0; j < 4; j++)
90 printf("%02X ", *ptr--);
95 printf("\t\tMMC_RSP_R3,4\t\t 0x%08X \n",
99 printf("\t\tERROR MMC rsp not supported\n");
104 return mmc->send_cmd(mmc, cmd, data);
108 int mmc_send_status(struct mmc *mmc, int timeout)
111 int err, retries = 5;
112 #ifdef CONFIG_MMC_TRACE
116 cmd.cmdidx = MMC_CMD_SEND_STATUS;
117 cmd.resp_type = MMC_RSP_R1;
118 if (!mmc_host_is_spi(mmc))
119 cmd.cmdarg = mmc->rca << 16;
123 err = mmc_send_cmd(mmc, &cmd, NULL);
125 if ((cmd.response[0] & MMC_STATUS_RDY_FOR_DATA) &&
126 (cmd.response[0] & MMC_STATUS_CURR_STATE) !=
129 else if (cmd.response[0] & MMC_STATUS_MASK) {
130 printf("Status Error: 0x%08X\n",
134 } else if (--retries < 0)
141 #ifdef CONFIG_MMC_TRACE
142 status = (cmd.response[0] & MMC_STATUS_CURR_STATE) >> 9;
143 printf("CURR STATE:%d\n", status);
146 printf("Timeout waiting card ready\n");
153 int mmc_set_blocklen(struct mmc *mmc, int len)
157 cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
158 cmd.resp_type = MMC_RSP_R1;
162 return mmc_send_cmd(mmc, &cmd, NULL);
165 struct mmc *find_mmc_device(int dev_num)
168 struct list_head *entry;
170 list_for_each(entry, &mmc_devices) {
171 m = list_entry(entry, struct mmc, link);
173 if (m->block_dev.dev == dev_num)
177 printf("MMC Device %d not found\n", dev_num);
182 static ulong mmc_erase_t(struct mmc *mmc, ulong start, lbaint_t blkcnt)
186 int err, start_cmd, end_cmd;
188 if (mmc->high_capacity)
189 end = start + blkcnt - 1;
191 end = (start + blkcnt - 1) * mmc->write_bl_len;
192 start *= mmc->write_bl_len;
196 start_cmd = SD_CMD_ERASE_WR_BLK_START;
197 end_cmd = SD_CMD_ERASE_WR_BLK_END;
199 start_cmd = MMC_CMD_ERASE_GROUP_START;
200 end_cmd = MMC_CMD_ERASE_GROUP_END;
203 cmd.cmdidx = start_cmd;
205 cmd.resp_type = MMC_RSP_R1;
208 err = mmc_send_cmd(mmc, &cmd, NULL);
212 cmd.cmdidx = end_cmd;
215 err = mmc_send_cmd(mmc, &cmd, NULL);
219 cmd.cmdidx = MMC_CMD_ERASE;
220 cmd.cmdarg = SECURE_ERASE;
221 cmd.resp_type = MMC_RSP_R1b;
223 err = mmc_send_cmd(mmc, &cmd, NULL);
230 puts("mmc erase failed\n");
235 mmc_berase(int dev_num, unsigned long start, lbaint_t blkcnt)
238 struct mmc *mmc = find_mmc_device(dev_num);
239 lbaint_t blk = 0, blk_r = 0;
244 if ((start % mmc->erase_grp_size) || (blkcnt % mmc->erase_grp_size))
245 printf("\n\nCaution! Your devices Erase group is 0x%x\n"
246 "The erase range would be change to 0x%lx~0x%lx\n\n",
247 mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1),
248 ((start + blkcnt + mmc->erase_grp_size)
249 & ~(mmc->erase_grp_size - 1)) - 1);
251 while (blk < blkcnt) {
252 blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ?
253 mmc->erase_grp_size : (blkcnt - blk);
254 err = mmc_erase_t(mmc, start + blk, blk_r);
265 mmc_write_blocks(struct mmc *mmc, ulong start, lbaint_t blkcnt, const void*src)
268 struct mmc_data data;
271 if ((start + blkcnt) > mmc->block_dev.lba) {
272 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
273 start + blkcnt, mmc->block_dev.lba);
278 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
280 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
282 if (mmc->high_capacity)
285 cmd.cmdarg = start * mmc->write_bl_len;
287 cmd.resp_type = MMC_RSP_R1;
291 data.blocks = blkcnt;
292 data.blocksize = mmc->write_bl_len;
293 data.flags = MMC_DATA_WRITE;
295 if (mmc_send_cmd(mmc, &cmd, &data)) {
296 printf("mmc write failed\n");
300 /* SPI multiblock writes terminate using a special
301 * token, not a STOP_TRANSMISSION request.
303 if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
304 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
306 cmd.resp_type = MMC_RSP_R1b;
308 if (mmc_send_cmd(mmc, &cmd, NULL)) {
309 printf("mmc fail to send stop cmd\n");
314 /* Waiting for the ready status */
315 if (mmc_send_status(mmc, timeout))
322 mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
324 lbaint_t cur, blocks_todo = blkcnt;
326 struct mmc *mmc = find_mmc_device(dev_num);
330 if (mmc_set_blocklen(mmc, mmc->write_bl_len))
334 cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo;
335 if(mmc_write_blocks(mmc, start, cur, src) != cur)
339 src += cur * mmc->write_bl_len;
340 } while (blocks_todo > 0);
345 int mmc_read_blocks(struct mmc *mmc, void *dst, ulong start, lbaint_t blkcnt)
348 struct mmc_data data;
351 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
353 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
355 if (mmc->high_capacity)
358 cmd.cmdarg = start * mmc->read_bl_len;
360 cmd.resp_type = MMC_RSP_R1;
364 data.blocks = blkcnt;
365 data.blocksize = mmc->read_bl_len;
366 data.flags = MMC_DATA_READ;
368 if (mmc_send_cmd(mmc, &cmd, &data))
372 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
374 cmd.resp_type = MMC_RSP_R1b;
376 if (mmc_send_cmd(mmc, &cmd, NULL)) {
377 printf("mmc fail to send stop cmd\n");
385 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
387 lbaint_t cur, blocks_todo = blkcnt;
392 struct mmc *mmc = find_mmc_device(dev_num);
396 if ((start + blkcnt) > mmc->block_dev.lba) {
397 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
398 start + blkcnt, mmc->block_dev.lba);
402 if (mmc_set_blocklen(mmc, mmc->read_bl_len))
406 cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo;
407 if(mmc_read_blocks(mmc, dst, start, cur) != cur)
411 dst += cur * mmc->read_bl_len;
412 } while (blocks_todo > 0);
417 int mmc_go_idle(struct mmc* mmc)
424 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
426 cmd.resp_type = MMC_RSP_NONE;
429 err = mmc_send_cmd(mmc, &cmd, NULL);
440 sd_send_op_cond(struct mmc *mmc)
447 cmd.cmdidx = MMC_CMD_APP_CMD;
448 cmd.resp_type = MMC_RSP_R1;
452 err = mmc_send_cmd(mmc, &cmd, NULL);
457 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
458 cmd.resp_type = MMC_RSP_R3;
461 * Most cards do not answer if some reserved bits
462 * in the ocr are set. However, Some controller
463 * can set bit 7 (reserved for low voltages), but
464 * how to manage low voltages SD card is not yet
467 cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
468 (mmc->voltages & 0xff8000);
470 if (mmc->version == SD_VERSION_2)
471 cmd.cmdarg |= OCR_HCS;
473 err = mmc_send_cmd(mmc, &cmd, NULL);
479 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
484 if (mmc->version != SD_VERSION_2)
485 mmc->version = SD_VERSION_1_0;
487 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
488 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
489 cmd.resp_type = MMC_RSP_R3;
493 err = mmc_send_cmd(mmc, &cmd, NULL);
499 mmc->ocr = cmd.response[0];
501 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
507 int mmc_send_op_cond(struct mmc *mmc)
513 /* Some cards seem to need this */
516 /* Asking to the card its capabilities */
517 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
518 cmd.resp_type = MMC_RSP_R3;
522 err = mmc_send_cmd(mmc, &cmd, NULL);
530 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
531 cmd.resp_type = MMC_RSP_R3;
532 cmd.cmdarg = (mmc_host_is_spi(mmc) ? 0 :
534 (cmd.response[0] & OCR_VOLTAGE_MASK)) |
535 (cmd.response[0] & OCR_ACCESS_MODE));
537 if (mmc->host_caps & MMC_MODE_HC)
538 cmd.cmdarg |= OCR_HCS;
542 err = mmc_send_cmd(mmc, &cmd, NULL);
548 } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
553 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
554 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
555 cmd.resp_type = MMC_RSP_R3;
559 err = mmc_send_cmd(mmc, &cmd, NULL);
565 mmc->version = MMC_VERSION_UNKNOWN;
566 mmc->ocr = cmd.response[0];
568 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
575 int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
578 struct mmc_data data;
581 /* Get the Card Status Register */
582 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
583 cmd.resp_type = MMC_RSP_R1;
589 data.blocksize = 512;
590 data.flags = MMC_DATA_READ;
592 err = mmc_send_cmd(mmc, &cmd, &data);
598 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
604 cmd.cmdidx = MMC_CMD_SWITCH;
605 cmd.resp_type = MMC_RSP_R1b;
606 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
611 ret = mmc_send_cmd(mmc, &cmd, NULL);
613 /* Waiting for the ready status */
615 ret = mmc_send_status(mmc, timeout);
621 int mmc_change_freq(struct mmc *mmc)
623 ALLOC_CACHE_ALIGN_BUFFER(char, ext_csd, 512);
629 if (mmc_host_is_spi(mmc))
632 /* Only version 4 supports high-speed */
633 if (mmc->version < MMC_VERSION_4)
636 err = mmc_send_ext_csd(mmc, ext_csd);
641 cardtype = ext_csd[EXT_CSD_CARD_TYPE] & 0xf;
643 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
648 /* Now check to see that it worked */
649 err = mmc_send_ext_csd(mmc, ext_csd);
654 /* No high-speed support */
655 if (!ext_csd[EXT_CSD_HS_TIMING])
658 /* High Speed is set, there are two types: 52MHz and 26MHz */
659 if (cardtype & MMC_HS_52MHZ)
660 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
662 mmc->card_caps |= MMC_MODE_HS;
667 int mmc_switch_part(int dev_num, unsigned int part_num)
669 struct mmc *mmc = find_mmc_device(dev_num);
674 return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
675 (mmc->part_config & ~PART_ACCESS_MASK)
676 | (part_num & PART_ACCESS_MASK));
679 int mmc_getcd(struct mmc *mmc)
683 cd = board_mmc_getcd(mmc);
685 if ((cd < 0) && mmc->getcd)
686 cd = mmc->getcd(mmc);
691 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
694 struct mmc_data data;
696 /* Switch the frequency */
697 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
698 cmd.resp_type = MMC_RSP_R1;
699 cmd.cmdarg = (mode << 31) | 0xffffff;
700 cmd.cmdarg &= ~(0xf << (group * 4));
701 cmd.cmdarg |= value << (group * 4);
704 data.dest = (char *)resp;
707 data.flags = MMC_DATA_READ;
709 return mmc_send_cmd(mmc, &cmd, &data);
713 int sd_change_freq(struct mmc *mmc)
717 ALLOC_CACHE_ALIGN_BUFFER(uint, scr, 2);
718 ALLOC_CACHE_ALIGN_BUFFER(uint, switch_status, 16);
719 struct mmc_data data;
724 if (mmc_host_is_spi(mmc))
727 /* Read the SCR to find out if this card supports higher speeds */
728 cmd.cmdidx = MMC_CMD_APP_CMD;
729 cmd.resp_type = MMC_RSP_R1;
730 cmd.cmdarg = mmc->rca << 16;
733 err = mmc_send_cmd(mmc, &cmd, NULL);
738 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
739 cmd.resp_type = MMC_RSP_R1;
746 data.dest = (char *)scr;
749 data.flags = MMC_DATA_READ;
751 err = mmc_send_cmd(mmc, &cmd, &data);
760 mmc->scr[0] = __be32_to_cpu(scr[0]);
761 mmc->scr[1] = __be32_to_cpu(scr[1]);
763 switch ((mmc->scr[0] >> 24) & 0xf) {
765 mmc->version = SD_VERSION_1_0;
768 mmc->version = SD_VERSION_1_10;
771 mmc->version = SD_VERSION_2;
774 mmc->version = SD_VERSION_1_0;
778 if (mmc->scr[0] & SD_DATA_4BIT)
779 mmc->card_caps |= MMC_MODE_4BIT;
781 /* Version 1.0 doesn't support switching */
782 if (mmc->version == SD_VERSION_1_0)
787 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
788 (u8 *)switch_status);
793 /* The high-speed function is busy. Try again */
794 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
798 /* If high-speed isn't supported, we return */
799 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
803 * If the host doesn't support SD_HIGHSPEED, do not switch card to
804 * HIGHSPEED mode even if the card support SD_HIGHSPPED.
805 * This can avoid furthur problem when the card runs in different
806 * mode between the host.
808 if (!((mmc->host_caps & MMC_MODE_HS_52MHz) &&
809 (mmc->host_caps & MMC_MODE_HS)))
812 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)switch_status);
817 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
818 mmc->card_caps |= MMC_MODE_HS;
823 /* frequency bases */
824 /* divided by 10 to be nice to platforms without floating point */
825 static const int fbase[] = {
832 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
833 * to platforms without floating point.
835 static const int multipliers[] = {
854 void mmc_set_ios(struct mmc *mmc)
859 void mmc_set_clock(struct mmc *mmc, uint clock)
861 if (clock > mmc->f_max)
864 if (clock < mmc->f_min)
872 void mmc_set_bus_width(struct mmc *mmc, uint width)
874 mmc->bus_width = width;
879 int mmc_startup(struct mmc *mmc)
883 u64 cmult, csize, capacity;
885 ALLOC_CACHE_ALIGN_BUFFER(char, ext_csd, 512);
886 ALLOC_CACHE_ALIGN_BUFFER(char, test_csd, 512);
889 #ifdef CONFIG_MMC_SPI_CRC_ON
890 if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
891 cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
892 cmd.resp_type = MMC_RSP_R1;
895 err = mmc_send_cmd(mmc, &cmd, NULL);
902 /* Put the Card in Identify Mode */
903 cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
904 MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
905 cmd.resp_type = MMC_RSP_R2;
909 err = mmc_send_cmd(mmc, &cmd, NULL);
914 memcpy(mmc->cid, cmd.response, 16);
917 * For MMC cards, set the Relative Address.
918 * For SD cards, get the Relatvie Address.
919 * This also puts the cards into Standby State
921 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
922 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
923 cmd.cmdarg = mmc->rca << 16;
924 cmd.resp_type = MMC_RSP_R6;
927 err = mmc_send_cmd(mmc, &cmd, NULL);
933 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
936 /* Get the Card-Specific Data */
937 cmd.cmdidx = MMC_CMD_SEND_CSD;
938 cmd.resp_type = MMC_RSP_R2;
939 cmd.cmdarg = mmc->rca << 16;
942 err = mmc_send_cmd(mmc, &cmd, NULL);
944 /* Waiting for the ready status */
945 mmc_send_status(mmc, timeout);
950 mmc->csd[0] = cmd.response[0];
951 mmc->csd[1] = cmd.response[1];
952 mmc->csd[2] = cmd.response[2];
953 mmc->csd[3] = cmd.response[3];
955 if (mmc->version == MMC_VERSION_UNKNOWN) {
956 int version = (cmd.response[0] >> 26) & 0xf;
960 mmc->version = MMC_VERSION_1_2;
963 mmc->version = MMC_VERSION_1_4;
966 mmc->version = MMC_VERSION_2_2;
969 mmc->version = MMC_VERSION_3;
972 mmc->version = MMC_VERSION_4;
975 mmc->version = MMC_VERSION_1_2;
980 /* divide frequency by 10, since the mults are 10x bigger */
981 freq = fbase[(cmd.response[0] & 0x7)];
982 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
984 mmc->tran_speed = freq * mult;
986 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
989 mmc->write_bl_len = mmc->read_bl_len;
991 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
993 if (mmc->high_capacity) {
994 csize = (mmc->csd[1] & 0x3f) << 16
995 | (mmc->csd[2] & 0xffff0000) >> 16;
998 csize = (mmc->csd[1] & 0x3ff) << 2
999 | (mmc->csd[2] & 0xc0000000) >> 30;
1000 cmult = (mmc->csd[2] & 0x00038000) >> 15;
1003 mmc->capacity = (csize + 1) << (cmult + 2);
1004 mmc->capacity *= mmc->read_bl_len;
1006 if (mmc->read_bl_len > 512)
1007 mmc->read_bl_len = 512;
1009 if (mmc->write_bl_len > 512)
1010 mmc->write_bl_len = 512;
1012 /* Select the card, and put it into Transfer Mode */
1013 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
1014 cmd.cmdidx = MMC_CMD_SELECT_CARD;
1015 cmd.resp_type = MMC_RSP_R1;
1016 cmd.cmdarg = mmc->rca << 16;
1018 err = mmc_send_cmd(mmc, &cmd, NULL);
1025 * For SD, its erase group is always one sector
1027 mmc->erase_grp_size = 1;
1028 mmc->part_config = MMCPART_NOAVAILABLE;
1029 if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
1030 /* check ext_csd version and capacity */
1031 err = mmc_send_ext_csd(mmc, ext_csd);
1032 if (!err & (ext_csd[EXT_CSD_REV] >= 2)) {
1034 * According to the JEDEC Standard, the value of
1035 * ext_csd's capacity is valid if the value is more
1038 capacity = ext_csd[EXT_CSD_SEC_CNT] << 0
1039 | ext_csd[EXT_CSD_SEC_CNT + 1] << 8
1040 | ext_csd[EXT_CSD_SEC_CNT + 2] << 16
1041 | ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
1043 if ((capacity >> 20) > 2 * 1024)
1044 mmc->capacity = capacity;
1048 * Check whether GROUP_DEF is set, if yes, read out
1049 * group size from ext_csd directly, or calculate
1050 * the group size from the csd value.
1052 if (ext_csd[EXT_CSD_ERASE_GROUP_DEF])
1053 mmc->erase_grp_size =
1054 ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 512 * 1024;
1056 int erase_gsz, erase_gmul;
1057 erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10;
1058 erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5;
1059 mmc->erase_grp_size = (erase_gsz + 1)
1063 /* store the partition info of emmc */
1064 if (ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT)
1065 mmc->part_config = ext_csd[EXT_CSD_PART_CONF];
1069 err = sd_change_freq(mmc);
1071 err = mmc_change_freq(mmc);
1076 /* Restrict card's capabilities by what the host can do */
1077 mmc->card_caps &= mmc->host_caps;
1080 if (mmc->card_caps & MMC_MODE_4BIT) {
1081 cmd.cmdidx = MMC_CMD_APP_CMD;
1082 cmd.resp_type = MMC_RSP_R1;
1083 cmd.cmdarg = mmc->rca << 16;
1086 err = mmc_send_cmd(mmc, &cmd, NULL);
1090 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
1091 cmd.resp_type = MMC_RSP_R1;
1094 err = mmc_send_cmd(mmc, &cmd, NULL);
1098 mmc_set_bus_width(mmc, 4);
1101 if (mmc->card_caps & MMC_MODE_HS)
1102 mmc_set_clock(mmc, 50000000);
1104 mmc_set_clock(mmc, 25000000);
1106 for (width = EXT_CSD_BUS_WIDTH_8; width >= 0; width--) {
1107 /* Set the card to use 4 bit*/
1108 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1109 EXT_CSD_BUS_WIDTH, width);
1115 mmc_set_bus_width(mmc, 1);
1118 mmc_set_bus_width(mmc, 4 * width);
1120 err = mmc_send_ext_csd(mmc, test_csd);
1121 if (!err && ext_csd[EXT_CSD_PARTITIONING_SUPPORT] \
1122 == test_csd[EXT_CSD_PARTITIONING_SUPPORT]
1123 && ext_csd[EXT_CSD_ERASE_GROUP_DEF] \
1124 == test_csd[EXT_CSD_ERASE_GROUP_DEF] \
1125 && ext_csd[EXT_CSD_REV] \
1126 == test_csd[EXT_CSD_REV]
1127 && ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] \
1128 == test_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
1129 && memcmp(&ext_csd[EXT_CSD_SEC_CNT], \
1130 &test_csd[EXT_CSD_SEC_CNT], 4) == 0) {
1132 mmc->card_caps |= width;
1137 if (mmc->card_caps & MMC_MODE_HS) {
1138 if (mmc->card_caps & MMC_MODE_HS_52MHz)
1139 mmc_set_clock(mmc, 52000000);
1141 mmc_set_clock(mmc, 26000000);
1143 mmc_set_clock(mmc, 20000000);
1146 /* fill in device description */
1147 mmc->block_dev.lun = 0;
1148 mmc->block_dev.type = 0;
1149 mmc->block_dev.blksz = mmc->read_bl_len;
1150 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
1151 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
1152 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
1153 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
1154 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
1155 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
1156 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
1157 (mmc->cid[2] >> 24) & 0xf);
1158 init_part(&mmc->block_dev);
1163 int mmc_send_if_cond(struct mmc *mmc)
1168 cmd.cmdidx = SD_CMD_SEND_IF_COND;
1169 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
1170 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
1171 cmd.resp_type = MMC_RSP_R7;
1174 err = mmc_send_cmd(mmc, &cmd, NULL);
1179 if ((cmd.response[0] & 0xff) != 0xaa)
1180 return UNUSABLE_ERR;
1182 mmc->version = SD_VERSION_2;
1187 int mmc_register(struct mmc *mmc)
1189 /* Setup the universal parts of the block interface just once */
1190 mmc->block_dev.if_type = IF_TYPE_MMC;
1191 mmc->block_dev.dev = cur_dev_num++;
1192 mmc->block_dev.removable = 1;
1193 mmc->block_dev.block_read = mmc_bread;
1194 mmc->block_dev.block_write = mmc_bwrite;
1195 mmc->block_dev.block_erase = mmc_berase;
1197 mmc->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
1199 INIT_LIST_HEAD (&mmc->link);
1201 list_add_tail (&mmc->link, &mmc_devices);
1206 #ifdef CONFIG_PARTITIONS
1207 block_dev_desc_t *mmc_get_dev(int dev)
1209 struct mmc *mmc = find_mmc_device(dev);
1211 return mmc ? &mmc->block_dev : NULL;
1215 int mmc_init(struct mmc *mmc)
1219 if (mmc_getcd(mmc) == 0) {
1221 printf("MMC: no card present\n");
1228 err = mmc->init(mmc);
1233 mmc_set_bus_width(mmc, 1);
1234 mmc_set_clock(mmc, 1);
1236 /* Reset the Card */
1237 err = mmc_go_idle(mmc);
1242 /* The internal partition reset to user partition(0) at every CMD0*/
1245 /* Test for SD version 2 */
1246 err = mmc_send_if_cond(mmc);
1248 /* Now try to get the SD card's operating condition */
1249 err = sd_send_op_cond(mmc);
1251 /* If the command timed out, we check for an MMC card */
1252 if (err == TIMEOUT) {
1253 err = mmc_send_op_cond(mmc);
1256 printf("Card did not respond to voltage select!\n");
1257 return UNUSABLE_ERR;
1261 err = mmc_startup(mmc);
1270 * CPU and board-specific MMC initializations. Aliased function
1271 * signals caller to move on
1273 static int __def_mmc_init(bd_t *bis)
1278 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1279 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1281 void print_mmc_devices(char separator)
1284 struct list_head *entry;
1286 list_for_each(entry, &mmc_devices) {
1287 m = list_entry(entry, struct mmc, link);
1289 printf("%s: %d", m->name, m->block_dev.dev);
1291 if (entry->next != &mmc_devices)
1292 printf("%c ", separator);
1298 int get_mmc_num(void)
1303 int mmc_initialize(bd_t *bis)
1305 INIT_LIST_HEAD (&mmc_devices);
1308 if (board_mmc_init(bis) < 0)
1311 print_mmc_devices(',');