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(u8 *cd, struct mmc *mmc) {
47 int board_mmc_getcd(u8 *cd, 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)
112 #ifdef CONFIG_MMC_TRACE
116 cmd.cmdidx = MMC_CMD_SEND_STATUS;
117 cmd.resp_type = MMC_RSP_R1;
122 err = mmc_send_cmd(mmc, &cmd, NULL);
125 else if (cmd.response[0] & MMC_STATUS_RDY_FOR_DATA)
130 if (cmd.response[0] & MMC_STATUS_MASK) {
131 printf("Status Error: 0x%08X\n", cmd.response[0]);
136 #ifdef CONFIG_MMC_TRACE
137 status = (cmd.response[0] & MMC_STATUS_CURR_STATE) >> 9;
138 printf("CURR STATE:%d\n", status);
141 printf("Timeout waiting card ready\n");
148 int mmc_set_blocklen(struct mmc *mmc, int len)
152 cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
153 cmd.resp_type = MMC_RSP_R1;
157 return mmc_send_cmd(mmc, &cmd, NULL);
160 struct mmc *find_mmc_device(int dev_num)
163 struct list_head *entry;
165 list_for_each(entry, &mmc_devices) {
166 m = list_entry(entry, struct mmc, link);
168 if (m->block_dev.dev == dev_num)
172 printf("MMC Device %d not found\n", dev_num);
177 static ulong mmc_erase_t(struct mmc *mmc, ulong start, lbaint_t blkcnt)
181 int err, start_cmd, end_cmd;
183 if (mmc->high_capacity)
184 end = start + blkcnt - 1;
186 end = (start + blkcnt - 1) * mmc->write_bl_len;
187 start *= mmc->write_bl_len;
191 start_cmd = SD_CMD_ERASE_WR_BLK_START;
192 end_cmd = SD_CMD_ERASE_WR_BLK_END;
194 start_cmd = MMC_CMD_ERASE_GROUP_START;
195 end_cmd = MMC_CMD_ERASE_GROUP_END;
198 cmd.cmdidx = start_cmd;
200 cmd.resp_type = MMC_RSP_R1;
203 err = mmc_send_cmd(mmc, &cmd, NULL);
207 cmd.cmdidx = end_cmd;
210 err = mmc_send_cmd(mmc, &cmd, NULL);
214 cmd.cmdidx = MMC_CMD_ERASE;
215 cmd.cmdarg = SECURE_ERASE;
216 cmd.resp_type = MMC_RSP_R1b;
218 err = mmc_send_cmd(mmc, &cmd, NULL);
225 puts("mmc erase failed\n");
230 mmc_berase(int dev_num, unsigned long start, lbaint_t blkcnt)
233 struct mmc *mmc = find_mmc_device(dev_num);
234 lbaint_t blk = 0, blk_r = 0;
239 if ((start % mmc->erase_grp_size) || (blkcnt % mmc->erase_grp_size))
240 printf("\n\nCaution! Your devices Erase group is 0x%x\n"
241 "The erase range would be change to 0x%lx~0x%lx\n\n",
242 mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1),
243 ((start + blkcnt + mmc->erase_grp_size)
244 & ~(mmc->erase_grp_size - 1)) - 1);
246 while (blk < blkcnt) {
247 blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ?
248 mmc->erase_grp_size : (blkcnt - blk);
249 err = mmc_erase_t(mmc, start + blk, blk_r);
260 mmc_write_blocks(struct mmc *mmc, ulong start, lbaint_t blkcnt, const void*src)
263 struct mmc_data data;
266 if ((start + blkcnt) > mmc->block_dev.lba) {
267 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
268 start + blkcnt, mmc->block_dev.lba);
273 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
275 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
277 if (mmc->high_capacity)
280 cmd.cmdarg = start * mmc->write_bl_len;
282 cmd.resp_type = MMC_RSP_R1;
286 data.blocks = blkcnt;
287 data.blocksize = mmc->write_bl_len;
288 data.flags = MMC_DATA_WRITE;
290 if (mmc_send_cmd(mmc, &cmd, &data)) {
291 printf("mmc write failed\n");
295 /* SPI multiblock writes terminate using a special
296 * token, not a STOP_TRANSMISSION request.
298 if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
299 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
301 cmd.resp_type = MMC_RSP_R1b;
303 if (mmc_send_cmd(mmc, &cmd, NULL)) {
304 printf("mmc fail to send stop cmd\n");
308 /* Waiting for the ready status */
309 mmc_send_status(mmc, timeout);
316 mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
318 lbaint_t cur, blocks_todo = blkcnt;
320 struct mmc *mmc = find_mmc_device(dev_num);
324 if (mmc_set_blocklen(mmc, mmc->write_bl_len))
328 cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo;
329 if(mmc_write_blocks(mmc, start, cur, src) != cur)
333 src += cur * mmc->write_bl_len;
334 } while (blocks_todo > 0);
339 int mmc_read_blocks(struct mmc *mmc, void *dst, ulong start, lbaint_t blkcnt)
342 struct mmc_data data;
346 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
348 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
350 if (mmc->high_capacity)
353 cmd.cmdarg = start * mmc->read_bl_len;
355 cmd.resp_type = MMC_RSP_R1;
359 data.blocks = blkcnt;
360 data.blocksize = mmc->read_bl_len;
361 data.flags = MMC_DATA_READ;
363 if (mmc_send_cmd(mmc, &cmd, &data))
367 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
369 cmd.resp_type = MMC_RSP_R1b;
371 if (mmc_send_cmd(mmc, &cmd, NULL)) {
372 printf("mmc fail to send stop cmd\n");
376 /* Waiting for the ready status */
377 mmc_send_status(mmc, timeout);
383 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
385 lbaint_t cur, blocks_todo = blkcnt;
390 struct mmc *mmc = find_mmc_device(dev_num);
394 if ((start + blkcnt) > mmc->block_dev.lba) {
395 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
396 start + blkcnt, mmc->block_dev.lba);
400 if (mmc_set_blocklen(mmc, mmc->read_bl_len))
404 cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo;
405 if(mmc_read_blocks(mmc, dst, start, cur) != cur)
409 dst += cur * mmc->read_bl_len;
410 } while (blocks_todo > 0);
415 int mmc_go_idle(struct mmc* mmc)
422 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
424 cmd.resp_type = MMC_RSP_NONE;
427 err = mmc_send_cmd(mmc, &cmd, NULL);
438 sd_send_op_cond(struct mmc *mmc)
445 cmd.cmdidx = MMC_CMD_APP_CMD;
446 cmd.resp_type = MMC_RSP_R1;
450 err = mmc_send_cmd(mmc, &cmd, NULL);
455 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
456 cmd.resp_type = MMC_RSP_R3;
459 * Most cards do not answer if some reserved bits
460 * in the ocr are set. However, Some controller
461 * can set bit 7 (reserved for low voltages), but
462 * how to manage low voltages SD card is not yet
465 cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
466 (mmc->voltages & 0xff8000);
468 if (mmc->version == SD_VERSION_2)
469 cmd.cmdarg |= OCR_HCS;
471 err = mmc_send_cmd(mmc, &cmd, NULL);
477 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
482 if (mmc->version != SD_VERSION_2)
483 mmc->version = SD_VERSION_1_0;
485 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
486 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
487 cmd.resp_type = MMC_RSP_R3;
491 err = mmc_send_cmd(mmc, &cmd, NULL);
497 mmc->ocr = cmd.response[0];
499 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
505 int mmc_send_op_cond(struct mmc *mmc)
511 /* Some cards seem to need this */
514 /* Asking to the card its capabilities */
515 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
516 cmd.resp_type = MMC_RSP_R3;
520 err = mmc_send_cmd(mmc, &cmd, NULL);
528 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
529 cmd.resp_type = MMC_RSP_R3;
530 cmd.cmdarg = (mmc_host_is_spi(mmc) ? 0 :
532 (cmd.response[0] & OCR_VOLTAGE_MASK)) |
533 (cmd.response[0] & OCR_ACCESS_MODE));
536 err = mmc_send_cmd(mmc, &cmd, NULL);
542 } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
547 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
548 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
549 cmd.resp_type = MMC_RSP_R3;
553 err = mmc_send_cmd(mmc, &cmd, NULL);
559 mmc->version = MMC_VERSION_UNKNOWN;
560 mmc->ocr = cmd.response[0];
562 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
569 int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
572 struct mmc_data data;
575 /* Get the Card Status Register */
576 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
577 cmd.resp_type = MMC_RSP_R1;
583 data.blocksize = 512;
584 data.flags = MMC_DATA_READ;
586 err = mmc_send_cmd(mmc, &cmd, &data);
592 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
598 cmd.cmdidx = MMC_CMD_SWITCH;
599 cmd.resp_type = MMC_RSP_R1b;
600 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
605 ret = mmc_send_cmd(mmc, &cmd, NULL);
607 /* Waiting for the ready status */
608 mmc_send_status(mmc, timeout);
614 int mmc_change_freq(struct mmc *mmc)
622 if (mmc_host_is_spi(mmc))
625 /* Only version 4 supports high-speed */
626 if (mmc->version < MMC_VERSION_4)
629 mmc->card_caps |= MMC_MODE_4BIT;
631 err = mmc_send_ext_csd(mmc, ext_csd);
636 cardtype = ext_csd[196] & 0xf;
638 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
643 /* Now check to see that it worked */
644 err = mmc_send_ext_csd(mmc, ext_csd);
649 /* No high-speed support */
653 /* High Speed is set, there are two types: 52MHz and 26MHz */
654 if (cardtype & MMC_HS_52MHZ)
655 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
657 mmc->card_caps |= MMC_MODE_HS;
662 int mmc_switch_part(int dev_num, unsigned int part_num)
664 struct mmc *mmc = find_mmc_device(dev_num);
669 return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
670 (mmc->part_config & ~PART_ACCESS_MASK)
671 | (part_num & PART_ACCESS_MASK));
674 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
677 struct mmc_data data;
679 /* Switch the frequency */
680 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
681 cmd.resp_type = MMC_RSP_R1;
682 cmd.cmdarg = (mode << 31) | 0xffffff;
683 cmd.cmdarg &= ~(0xf << (group * 4));
684 cmd.cmdarg |= value << (group * 4);
687 data.dest = (char *)resp;
690 data.flags = MMC_DATA_READ;
692 return mmc_send_cmd(mmc, &cmd, &data);
696 int sd_change_freq(struct mmc *mmc)
701 uint switch_status[16];
702 struct mmc_data data;
707 if (mmc_host_is_spi(mmc))
710 /* Read the SCR to find out if this card supports higher speeds */
711 cmd.cmdidx = MMC_CMD_APP_CMD;
712 cmd.resp_type = MMC_RSP_R1;
713 cmd.cmdarg = mmc->rca << 16;
716 err = mmc_send_cmd(mmc, &cmd, NULL);
721 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
722 cmd.resp_type = MMC_RSP_R1;
729 data.dest = (char *)&scr;
732 data.flags = MMC_DATA_READ;
734 err = mmc_send_cmd(mmc, &cmd, &data);
743 mmc->scr[0] = __be32_to_cpu(scr[0]);
744 mmc->scr[1] = __be32_to_cpu(scr[1]);
746 switch ((mmc->scr[0] >> 24) & 0xf) {
748 mmc->version = SD_VERSION_1_0;
751 mmc->version = SD_VERSION_1_10;
754 mmc->version = SD_VERSION_2;
757 mmc->version = SD_VERSION_1_0;
761 if (mmc->scr[0] & SD_DATA_4BIT)
762 mmc->card_caps |= MMC_MODE_4BIT;
764 /* Version 1.0 doesn't support switching */
765 if (mmc->version == SD_VERSION_1_0)
770 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
771 (u8 *)&switch_status);
776 /* The high-speed function is busy. Try again */
777 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
781 /* If high-speed isn't supported, we return */
782 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
785 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status);
790 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
791 mmc->card_caps |= MMC_MODE_HS;
796 /* frequency bases */
797 /* divided by 10 to be nice to platforms without floating point */
798 static const int fbase[] = {
805 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
806 * to platforms without floating point.
808 static const int multipliers[] = {
827 void mmc_set_ios(struct mmc *mmc)
832 void mmc_set_clock(struct mmc *mmc, uint clock)
834 if (clock > mmc->f_max)
837 if (clock < mmc->f_min)
845 void mmc_set_bus_width(struct mmc *mmc, uint width)
847 mmc->bus_width = width;
852 int mmc_startup(struct mmc *mmc)
861 #ifdef CONFIG_MMC_SPI_CRC_ON
862 if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
863 cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
864 cmd.resp_type = MMC_RSP_R1;
867 err = mmc_send_cmd(mmc, &cmd, NULL);
874 /* Put the Card in Identify Mode */
875 cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
876 MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
877 cmd.resp_type = MMC_RSP_R2;
881 err = mmc_send_cmd(mmc, &cmd, NULL);
886 memcpy(mmc->cid, cmd.response, 16);
889 * For MMC cards, set the Relative Address.
890 * For SD cards, get the Relatvie Address.
891 * This also puts the cards into Standby State
893 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
894 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
895 cmd.cmdarg = mmc->rca << 16;
896 cmd.resp_type = MMC_RSP_R6;
899 err = mmc_send_cmd(mmc, &cmd, NULL);
905 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
908 /* Get the Card-Specific Data */
909 cmd.cmdidx = MMC_CMD_SEND_CSD;
910 cmd.resp_type = MMC_RSP_R2;
911 cmd.cmdarg = mmc->rca << 16;
914 err = mmc_send_cmd(mmc, &cmd, NULL);
916 /* Waiting for the ready status */
917 mmc_send_status(mmc, timeout);
922 mmc->csd[0] = cmd.response[0];
923 mmc->csd[1] = cmd.response[1];
924 mmc->csd[2] = cmd.response[2];
925 mmc->csd[3] = cmd.response[3];
927 if (mmc->version == MMC_VERSION_UNKNOWN) {
928 int version = (cmd.response[0] >> 26) & 0xf;
932 mmc->version = MMC_VERSION_1_2;
935 mmc->version = MMC_VERSION_1_4;
938 mmc->version = MMC_VERSION_2_2;
941 mmc->version = MMC_VERSION_3;
944 mmc->version = MMC_VERSION_4;
947 mmc->version = MMC_VERSION_1_2;
952 /* divide frequency by 10, since the mults are 10x bigger */
953 freq = fbase[(cmd.response[0] & 0x7)];
954 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
956 mmc->tran_speed = freq * mult;
958 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
961 mmc->write_bl_len = mmc->read_bl_len;
963 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
965 if (mmc->high_capacity) {
966 csize = (mmc->csd[1] & 0x3f) << 16
967 | (mmc->csd[2] & 0xffff0000) >> 16;
970 csize = (mmc->csd[1] & 0x3ff) << 2
971 | (mmc->csd[2] & 0xc0000000) >> 30;
972 cmult = (mmc->csd[2] & 0x00038000) >> 15;
975 mmc->capacity = (csize + 1) << (cmult + 2);
976 mmc->capacity *= mmc->read_bl_len;
978 if (mmc->read_bl_len > 512)
979 mmc->read_bl_len = 512;
981 if (mmc->write_bl_len > 512)
982 mmc->write_bl_len = 512;
984 /* Select the card, and put it into Transfer Mode */
985 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
986 cmd.cmdidx = MMC_CMD_SELECT_CARD;
987 cmd.resp_type = MMC_RSP_R1b;
988 cmd.cmdarg = mmc->rca << 16;
990 err = mmc_send_cmd(mmc, &cmd, NULL);
997 * For SD, its erase group is always one sector
999 mmc->erase_grp_size = 1;
1000 mmc->part_config = MMCPART_NOAVAILABLE;
1001 if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
1002 /* check ext_csd version and capacity */
1003 err = mmc_send_ext_csd(mmc, ext_csd);
1004 if (!err & (ext_csd[192] >= 2)) {
1005 mmc->capacity = ext_csd[212] << 0 | ext_csd[213] << 8 |
1006 ext_csd[214] << 16 | ext_csd[215] << 24;
1007 mmc->capacity *= 512;
1011 * Check whether GROUP_DEF is set, if yes, read out
1012 * group size from ext_csd directly, or calculate
1013 * the group size from the csd value.
1016 mmc->erase_grp_size = ext_csd[224] * 512 * 1024;
1018 int erase_gsz, erase_gmul;
1019 erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10;
1020 erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5;
1021 mmc->erase_grp_size = (erase_gsz + 1)
1025 /* store the partition info of emmc */
1026 if (ext_csd[160] & PART_SUPPORT)
1027 mmc->part_config = ext_csd[179];
1031 err = sd_change_freq(mmc);
1033 err = mmc_change_freq(mmc);
1038 /* Restrict card's capabilities by what the host can do */
1039 mmc->card_caps &= mmc->host_caps;
1042 if (mmc->card_caps & MMC_MODE_4BIT) {
1043 cmd.cmdidx = MMC_CMD_APP_CMD;
1044 cmd.resp_type = MMC_RSP_R1;
1045 cmd.cmdarg = mmc->rca << 16;
1048 err = mmc_send_cmd(mmc, &cmd, NULL);
1052 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
1053 cmd.resp_type = MMC_RSP_R1;
1056 err = mmc_send_cmd(mmc, &cmd, NULL);
1060 mmc_set_bus_width(mmc, 4);
1063 if (mmc->card_caps & MMC_MODE_HS)
1064 mmc_set_clock(mmc, 50000000);
1066 mmc_set_clock(mmc, 25000000);
1068 if (mmc->card_caps & MMC_MODE_4BIT) {
1069 /* Set the card to use 4 bit*/
1070 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1072 EXT_CSD_BUS_WIDTH_4);
1077 mmc_set_bus_width(mmc, 4);
1078 } else if (mmc->card_caps & MMC_MODE_8BIT) {
1079 /* Set the card to use 8 bit*/
1080 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
1082 EXT_CSD_BUS_WIDTH_8);
1087 mmc_set_bus_width(mmc, 8);
1090 if (mmc->card_caps & MMC_MODE_HS) {
1091 if (mmc->card_caps & MMC_MODE_HS_52MHz)
1092 mmc_set_clock(mmc, 52000000);
1094 mmc_set_clock(mmc, 26000000);
1096 mmc_set_clock(mmc, 20000000);
1099 /* fill in device description */
1100 mmc->block_dev.lun = 0;
1101 mmc->block_dev.type = 0;
1102 mmc->block_dev.blksz = mmc->read_bl_len;
1103 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
1104 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
1105 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
1106 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
1107 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
1108 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
1109 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
1110 (mmc->cid[2] >> 24) & 0xf);
1111 init_part(&mmc->block_dev);
1116 int mmc_send_if_cond(struct mmc *mmc)
1121 cmd.cmdidx = SD_CMD_SEND_IF_COND;
1122 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
1123 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
1124 cmd.resp_type = MMC_RSP_R7;
1127 err = mmc_send_cmd(mmc, &cmd, NULL);
1132 if ((cmd.response[0] & 0xff) != 0xaa)
1133 return UNUSABLE_ERR;
1135 mmc->version = SD_VERSION_2;
1140 int mmc_register(struct mmc *mmc)
1142 /* Setup the universal parts of the block interface just once */
1143 mmc->block_dev.if_type = IF_TYPE_MMC;
1144 mmc->block_dev.dev = cur_dev_num++;
1145 mmc->block_dev.removable = 1;
1146 mmc->block_dev.block_read = mmc_bread;
1147 mmc->block_dev.block_write = mmc_bwrite;
1148 mmc->block_dev.block_erase = mmc_berase;
1150 mmc->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
1152 INIT_LIST_HEAD (&mmc->link);
1154 list_add_tail (&mmc->link, &mmc_devices);
1159 block_dev_desc_t *mmc_get_dev(int dev)
1161 struct mmc *mmc = find_mmc_device(dev);
1163 return mmc ? &mmc->block_dev : NULL;
1166 int mmc_init(struct mmc *mmc)
1173 err = mmc->init(mmc);
1178 mmc_set_bus_width(mmc, 1);
1179 mmc_set_clock(mmc, 1);
1181 /* Reset the Card */
1182 err = mmc_go_idle(mmc);
1187 /* The internal partition reset to user partition(0) at every CMD0*/
1190 /* Test for SD version 2 */
1191 err = mmc_send_if_cond(mmc);
1193 /* Now try to get the SD card's operating condition */
1194 err = sd_send_op_cond(mmc);
1196 /* If the command timed out, we check for an MMC card */
1197 if (err == TIMEOUT) {
1198 err = mmc_send_op_cond(mmc);
1201 printf("Card did not respond to voltage select!\n");
1202 return UNUSABLE_ERR;
1206 err = mmc_startup(mmc);
1215 * CPU and board-specific MMC initializations. Aliased function
1216 * signals caller to move on
1218 static int __def_mmc_init(bd_t *bis)
1223 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1224 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1226 void print_mmc_devices(char separator)
1229 struct list_head *entry;
1231 list_for_each(entry, &mmc_devices) {
1232 m = list_entry(entry, struct mmc, link);
1234 printf("%s: %d", m->name, m->block_dev.dev);
1236 if (entry->next != &mmc_devices)
1237 printf("%c ", separator);
1243 int get_mmc_num(void)
1248 int mmc_initialize(bd_t *bis)
1250 INIT_LIST_HEAD (&mmc_devices);
1253 if (board_mmc_init(bis) < 0)
1256 print_mmc_devices(',');