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);
178 mmc_write_blocks(struct mmc *mmc, ulong start, lbaint_t blkcnt, const void*src)
181 struct mmc_data data;
184 if ((start + blkcnt) > mmc->block_dev.lba) {
185 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
186 start + blkcnt, mmc->block_dev.lba);
191 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
193 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
195 if (mmc->high_capacity)
198 cmd.cmdarg = start * mmc->write_bl_len;
200 cmd.resp_type = MMC_RSP_R1;
204 data.blocks = blkcnt;
205 data.blocksize = mmc->write_bl_len;
206 data.flags = MMC_DATA_WRITE;
208 if (mmc_send_cmd(mmc, &cmd, &data)) {
209 printf("mmc write failed\n");
213 /* SPI multiblock writes terminate using a special
214 * token, not a STOP_TRANSMISSION request.
216 if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
217 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
219 cmd.resp_type = MMC_RSP_R1b;
221 if (mmc_send_cmd(mmc, &cmd, NULL)) {
222 printf("mmc fail to send stop cmd\n");
226 /* Waiting for the ready status */
227 mmc_send_status(mmc, timeout);
234 mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
236 lbaint_t cur, blocks_todo = blkcnt;
238 struct mmc *mmc = find_mmc_device(dev_num);
242 if (mmc_set_blocklen(mmc, mmc->write_bl_len))
246 cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ?
247 CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo;
248 if(mmc_write_blocks(mmc, start, cur, src) != cur)
252 src += cur * mmc->write_bl_len;
253 } while (blocks_todo > 0);
258 int mmc_read_blocks(struct mmc *mmc, void *dst, ulong start, lbaint_t blkcnt)
261 struct mmc_data data;
265 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
267 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
269 if (mmc->high_capacity)
272 cmd.cmdarg = start * mmc->read_bl_len;
274 cmd.resp_type = MMC_RSP_R1;
278 data.blocks = blkcnt;
279 data.blocksize = mmc->read_bl_len;
280 data.flags = MMC_DATA_READ;
282 if (mmc_send_cmd(mmc, &cmd, &data))
286 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
288 cmd.resp_type = MMC_RSP_R1b;
290 if (mmc_send_cmd(mmc, &cmd, NULL)) {
291 printf("mmc fail to send stop cmd\n");
295 /* Waiting for the ready status */
296 mmc_send_status(mmc, timeout);
302 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
304 lbaint_t cur, blocks_todo = blkcnt;
309 struct mmc *mmc = find_mmc_device(dev_num);
313 if ((start + blkcnt) > mmc->block_dev.lba) {
314 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
315 start + blkcnt, mmc->block_dev.lba);
319 if (mmc_set_blocklen(mmc, mmc->read_bl_len))
323 cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ?
324 CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo;
325 if(mmc_read_blocks(mmc, dst, start, cur) != cur)
329 dst += cur * mmc->read_bl_len;
330 } while (blocks_todo > 0);
335 int mmc_go_idle(struct mmc* mmc)
342 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
344 cmd.resp_type = MMC_RSP_NONE;
347 err = mmc_send_cmd(mmc, &cmd, NULL);
358 sd_send_op_cond(struct mmc *mmc)
365 cmd.cmdidx = MMC_CMD_APP_CMD;
366 cmd.resp_type = MMC_RSP_R1;
370 err = mmc_send_cmd(mmc, &cmd, NULL);
375 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
376 cmd.resp_type = MMC_RSP_R3;
379 * Most cards do not answer if some reserved bits
380 * in the ocr are set. However, Some controller
381 * can set bit 7 (reserved for low voltages), but
382 * how to manage low voltages SD card is not yet
385 cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
386 (mmc->voltages & 0xff8000);
388 if (mmc->version == SD_VERSION_2)
389 cmd.cmdarg |= OCR_HCS;
391 err = mmc_send_cmd(mmc, &cmd, NULL);
397 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
402 if (mmc->version != SD_VERSION_2)
403 mmc->version = SD_VERSION_1_0;
405 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
406 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
407 cmd.resp_type = MMC_RSP_R3;
411 err = mmc_send_cmd(mmc, &cmd, NULL);
417 mmc->ocr = cmd.response[0];
419 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
425 int mmc_send_op_cond(struct mmc *mmc)
431 /* Some cards seem to need this */
434 /* Asking to the card its capabilities */
435 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
436 cmd.resp_type = MMC_RSP_R3;
440 err = mmc_send_cmd(mmc, &cmd, NULL);
448 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
449 cmd.resp_type = MMC_RSP_R3;
450 cmd.cmdarg = (mmc_host_is_spi(mmc) ? 0 :
452 (cmd.response[0] & OCR_VOLTAGE_MASK)) |
453 (cmd.response[0] & OCR_ACCESS_MODE));
456 err = mmc_send_cmd(mmc, &cmd, NULL);
462 } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
467 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
468 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
469 cmd.resp_type = MMC_RSP_R3;
473 err = mmc_send_cmd(mmc, &cmd, NULL);
479 mmc->version = MMC_VERSION_UNKNOWN;
480 mmc->ocr = cmd.response[0];
482 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
489 int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
492 struct mmc_data data;
495 /* Get the Card Status Register */
496 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
497 cmd.resp_type = MMC_RSP_R1;
503 data.blocksize = 512;
504 data.flags = MMC_DATA_READ;
506 err = mmc_send_cmd(mmc, &cmd, &data);
512 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
518 cmd.cmdidx = MMC_CMD_SWITCH;
519 cmd.resp_type = MMC_RSP_R1b;
520 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
525 ret = mmc_send_cmd(mmc, &cmd, NULL);
527 /* Waiting for the ready status */
528 mmc_send_status(mmc, timeout);
534 int mmc_change_freq(struct mmc *mmc)
542 if (mmc_host_is_spi(mmc))
545 /* Only version 4 supports high-speed */
546 if (mmc->version < MMC_VERSION_4)
549 mmc->card_caps |= MMC_MODE_4BIT;
551 err = mmc_send_ext_csd(mmc, ext_csd);
556 cardtype = ext_csd[196] & 0xf;
558 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
563 /* Now check to see that it worked */
564 err = mmc_send_ext_csd(mmc, ext_csd);
569 /* No high-speed support */
573 /* High Speed is set, there are two types: 52MHz and 26MHz */
574 if (cardtype & MMC_HS_52MHZ)
575 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
577 mmc->card_caps |= MMC_MODE_HS;
582 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
585 struct mmc_data data;
587 /* Switch the frequency */
588 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
589 cmd.resp_type = MMC_RSP_R1;
590 cmd.cmdarg = (mode << 31) | 0xffffff;
591 cmd.cmdarg &= ~(0xf << (group * 4));
592 cmd.cmdarg |= value << (group * 4);
595 data.dest = (char *)resp;
598 data.flags = MMC_DATA_READ;
600 return mmc_send_cmd(mmc, &cmd, &data);
604 int sd_change_freq(struct mmc *mmc)
609 uint switch_status[16];
610 struct mmc_data data;
615 if (mmc_host_is_spi(mmc))
618 /* Read the SCR to find out if this card supports higher speeds */
619 cmd.cmdidx = MMC_CMD_APP_CMD;
620 cmd.resp_type = MMC_RSP_R1;
621 cmd.cmdarg = mmc->rca << 16;
624 err = mmc_send_cmd(mmc, &cmd, NULL);
629 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
630 cmd.resp_type = MMC_RSP_R1;
637 data.dest = (char *)&scr;
640 data.flags = MMC_DATA_READ;
642 err = mmc_send_cmd(mmc, &cmd, &data);
651 mmc->scr[0] = __be32_to_cpu(scr[0]);
652 mmc->scr[1] = __be32_to_cpu(scr[1]);
654 switch ((mmc->scr[0] >> 24) & 0xf) {
656 mmc->version = SD_VERSION_1_0;
659 mmc->version = SD_VERSION_1_10;
662 mmc->version = SD_VERSION_2;
665 mmc->version = SD_VERSION_1_0;
669 if (mmc->scr[0] & SD_DATA_4BIT)
670 mmc->card_caps |= MMC_MODE_4BIT;
672 /* Version 1.0 doesn't support switching */
673 if (mmc->version == SD_VERSION_1_0)
678 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
679 (u8 *)&switch_status);
684 /* The high-speed function is busy. Try again */
685 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
689 /* If high-speed isn't supported, we return */
690 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
693 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status);
698 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
699 mmc->card_caps |= MMC_MODE_HS;
704 /* frequency bases */
705 /* divided by 10 to be nice to platforms without floating point */
706 static const int fbase[] = {
713 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
714 * to platforms without floating point.
716 static const int multipliers[] = {
735 void mmc_set_ios(struct mmc *mmc)
740 void mmc_set_clock(struct mmc *mmc, uint clock)
742 if (clock > mmc->f_max)
745 if (clock < mmc->f_min)
753 void mmc_set_bus_width(struct mmc *mmc, uint width)
755 mmc->bus_width = width;
760 int mmc_startup(struct mmc *mmc)
769 #ifdef CONFIG_MMC_SPI_CRC_ON
770 if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
771 cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
772 cmd.resp_type = MMC_RSP_R1;
775 err = mmc_send_cmd(mmc, &cmd, NULL);
782 /* Put the Card in Identify Mode */
783 cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
784 MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
785 cmd.resp_type = MMC_RSP_R2;
789 err = mmc_send_cmd(mmc, &cmd, NULL);
794 memcpy(mmc->cid, cmd.response, 16);
797 * For MMC cards, set the Relative Address.
798 * For SD cards, get the Relatvie Address.
799 * This also puts the cards into Standby State
801 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
802 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
803 cmd.cmdarg = mmc->rca << 16;
804 cmd.resp_type = MMC_RSP_R6;
807 err = mmc_send_cmd(mmc, &cmd, NULL);
813 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
816 /* Get the Card-Specific Data */
817 cmd.cmdidx = MMC_CMD_SEND_CSD;
818 cmd.resp_type = MMC_RSP_R2;
819 cmd.cmdarg = mmc->rca << 16;
822 err = mmc_send_cmd(mmc, &cmd, NULL);
824 /* Waiting for the ready status */
825 mmc_send_status(mmc, timeout);
830 mmc->csd[0] = cmd.response[0];
831 mmc->csd[1] = cmd.response[1];
832 mmc->csd[2] = cmd.response[2];
833 mmc->csd[3] = cmd.response[3];
835 if (mmc->version == MMC_VERSION_UNKNOWN) {
836 int version = (cmd.response[0] >> 26) & 0xf;
840 mmc->version = MMC_VERSION_1_2;
843 mmc->version = MMC_VERSION_1_4;
846 mmc->version = MMC_VERSION_2_2;
849 mmc->version = MMC_VERSION_3;
852 mmc->version = MMC_VERSION_4;
855 mmc->version = MMC_VERSION_1_2;
860 /* divide frequency by 10, since the mults are 10x bigger */
861 freq = fbase[(cmd.response[0] & 0x7)];
862 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
864 mmc->tran_speed = freq * mult;
866 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
869 mmc->write_bl_len = mmc->read_bl_len;
871 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
873 if (mmc->high_capacity) {
874 csize = (mmc->csd[1] & 0x3f) << 16
875 | (mmc->csd[2] & 0xffff0000) >> 16;
878 csize = (mmc->csd[1] & 0x3ff) << 2
879 | (mmc->csd[2] & 0xc0000000) >> 30;
880 cmult = (mmc->csd[2] & 0x00038000) >> 15;
883 mmc->capacity = (csize + 1) << (cmult + 2);
884 mmc->capacity *= mmc->read_bl_len;
886 if (mmc->read_bl_len > 512)
887 mmc->read_bl_len = 512;
889 if (mmc->write_bl_len > 512)
890 mmc->write_bl_len = 512;
892 /* Select the card, and put it into Transfer Mode */
893 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
894 cmd.cmdidx = MMC_CMD_SELECT_CARD;
895 cmd.resp_type = MMC_RSP_R1b;
896 cmd.cmdarg = mmc->rca << 16;
898 err = mmc_send_cmd(mmc, &cmd, NULL);
904 if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
905 /* check ext_csd version and capacity */
906 err = mmc_send_ext_csd(mmc, ext_csd);
907 if (!err & (ext_csd[192] >= 2)) {
908 mmc->capacity = ext_csd[212] << 0 | ext_csd[213] << 8 |
909 ext_csd[214] << 16 | ext_csd[215] << 24;
910 mmc->capacity *= 512;
915 err = sd_change_freq(mmc);
917 err = mmc_change_freq(mmc);
922 /* Restrict card's capabilities by what the host can do */
923 mmc->card_caps &= mmc->host_caps;
926 if (mmc->card_caps & MMC_MODE_4BIT) {
927 cmd.cmdidx = MMC_CMD_APP_CMD;
928 cmd.resp_type = MMC_RSP_R1;
929 cmd.cmdarg = mmc->rca << 16;
932 err = mmc_send_cmd(mmc, &cmd, NULL);
936 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
937 cmd.resp_type = MMC_RSP_R1;
940 err = mmc_send_cmd(mmc, &cmd, NULL);
944 mmc_set_bus_width(mmc, 4);
947 if (mmc->card_caps & MMC_MODE_HS)
948 mmc_set_clock(mmc, 50000000);
950 mmc_set_clock(mmc, 25000000);
952 if (mmc->card_caps & MMC_MODE_4BIT) {
953 /* Set the card to use 4 bit*/
954 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
956 EXT_CSD_BUS_WIDTH_4);
961 mmc_set_bus_width(mmc, 4);
962 } else if (mmc->card_caps & MMC_MODE_8BIT) {
963 /* Set the card to use 8 bit*/
964 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
966 EXT_CSD_BUS_WIDTH_8);
971 mmc_set_bus_width(mmc, 8);
974 if (mmc->card_caps & MMC_MODE_HS) {
975 if (mmc->card_caps & MMC_MODE_HS_52MHz)
976 mmc_set_clock(mmc, 52000000);
978 mmc_set_clock(mmc, 26000000);
980 mmc_set_clock(mmc, 20000000);
983 /* fill in device description */
984 mmc->block_dev.lun = 0;
985 mmc->block_dev.type = 0;
986 mmc->block_dev.blksz = mmc->read_bl_len;
987 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
988 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
989 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
990 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
991 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
992 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
993 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
994 (mmc->cid[2] >> 24) & 0xf);
995 init_part(&mmc->block_dev);
1000 int mmc_send_if_cond(struct mmc *mmc)
1005 cmd.cmdidx = SD_CMD_SEND_IF_COND;
1006 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
1007 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
1008 cmd.resp_type = MMC_RSP_R7;
1011 err = mmc_send_cmd(mmc, &cmd, NULL);
1016 if ((cmd.response[0] & 0xff) != 0xaa)
1017 return UNUSABLE_ERR;
1019 mmc->version = SD_VERSION_2;
1024 int mmc_register(struct mmc *mmc)
1026 /* Setup the universal parts of the block interface just once */
1027 mmc->block_dev.if_type = IF_TYPE_MMC;
1028 mmc->block_dev.dev = cur_dev_num++;
1029 mmc->block_dev.removable = 1;
1030 mmc->block_dev.block_read = mmc_bread;
1031 mmc->block_dev.block_write = mmc_bwrite;
1033 INIT_LIST_HEAD (&mmc->link);
1035 list_add_tail (&mmc->link, &mmc_devices);
1040 block_dev_desc_t *mmc_get_dev(int dev)
1042 struct mmc *mmc = find_mmc_device(dev);
1044 return mmc ? &mmc->block_dev : NULL;
1047 int mmc_init(struct mmc *mmc)
1051 err = mmc->init(mmc);
1056 mmc_set_bus_width(mmc, 1);
1057 mmc_set_clock(mmc, 1);
1059 /* Reset the Card */
1060 err = mmc_go_idle(mmc);
1065 /* Test for SD version 2 */
1066 err = mmc_send_if_cond(mmc);
1068 /* Now try to get the SD card's operating condition */
1069 err = sd_send_op_cond(mmc);
1071 /* If the command timed out, we check for an MMC card */
1072 if (err == TIMEOUT) {
1073 err = mmc_send_op_cond(mmc);
1076 printf("Card did not respond to voltage select!\n");
1077 return UNUSABLE_ERR;
1081 return mmc_startup(mmc);
1085 * CPU and board-specific MMC initializations. Aliased function
1086 * signals caller to move on
1088 static int __def_mmc_init(bd_t *bis)
1093 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1094 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1096 void print_mmc_devices(char separator)
1099 struct list_head *entry;
1101 list_for_each(entry, &mmc_devices) {
1102 m = list_entry(entry, struct mmc, link);
1104 printf("%s: %d", m->name, m->block_dev.dev);
1106 if (entry->next != &mmc_devices)
1107 printf("%c ", separator);
1113 int mmc_initialize(bd_t *bis)
1115 INIT_LIST_HEAD (&mmc_devices);
1118 if (board_mmc_init(bis) < 0)
1121 print_mmc_devices(',');