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 if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215])
557 mmc->high_capacity = 1;
559 cardtype = ext_csd[196] & 0xf;
561 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
566 /* Now check to see that it worked */
567 err = mmc_send_ext_csd(mmc, ext_csd);
572 /* No high-speed support */
576 /* High Speed is set, there are two types: 52MHz and 26MHz */
577 if (cardtype & MMC_HS_52MHZ)
578 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
580 mmc->card_caps |= MMC_MODE_HS;
585 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
588 struct mmc_data data;
590 /* Switch the frequency */
591 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
592 cmd.resp_type = MMC_RSP_R1;
593 cmd.cmdarg = (mode << 31) | 0xffffff;
594 cmd.cmdarg &= ~(0xf << (group * 4));
595 cmd.cmdarg |= value << (group * 4);
598 data.dest = (char *)resp;
601 data.flags = MMC_DATA_READ;
603 return mmc_send_cmd(mmc, &cmd, &data);
607 int sd_change_freq(struct mmc *mmc)
612 uint switch_status[16];
613 struct mmc_data data;
618 if (mmc_host_is_spi(mmc))
621 /* Read the SCR to find out if this card supports higher speeds */
622 cmd.cmdidx = MMC_CMD_APP_CMD;
623 cmd.resp_type = MMC_RSP_R1;
624 cmd.cmdarg = mmc->rca << 16;
627 err = mmc_send_cmd(mmc, &cmd, NULL);
632 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
633 cmd.resp_type = MMC_RSP_R1;
640 data.dest = (char *)&scr;
643 data.flags = MMC_DATA_READ;
645 err = mmc_send_cmd(mmc, &cmd, &data);
654 mmc->scr[0] = __be32_to_cpu(scr[0]);
655 mmc->scr[1] = __be32_to_cpu(scr[1]);
657 switch ((mmc->scr[0] >> 24) & 0xf) {
659 mmc->version = SD_VERSION_1_0;
662 mmc->version = SD_VERSION_1_10;
665 mmc->version = SD_VERSION_2;
668 mmc->version = SD_VERSION_1_0;
672 if (mmc->scr[0] & SD_DATA_4BIT)
673 mmc->card_caps |= MMC_MODE_4BIT;
675 /* Version 1.0 doesn't support switching */
676 if (mmc->version == SD_VERSION_1_0)
681 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
682 (u8 *)&switch_status);
687 /* The high-speed function is busy. Try again */
688 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
692 /* If high-speed isn't supported, we return */
693 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
696 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status);
701 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
702 mmc->card_caps |= MMC_MODE_HS;
707 /* frequency bases */
708 /* divided by 10 to be nice to platforms without floating point */
709 static const int fbase[] = {
716 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
717 * to platforms without floating point.
719 static const int multipliers[] = {
738 void mmc_set_ios(struct mmc *mmc)
743 void mmc_set_clock(struct mmc *mmc, uint clock)
745 if (clock > mmc->f_max)
748 if (clock < mmc->f_min)
756 void mmc_set_bus_width(struct mmc *mmc, uint width)
758 mmc->bus_width = width;
763 int mmc_startup(struct mmc *mmc)
772 #ifdef CONFIG_MMC_SPI_CRC_ON
773 if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
774 cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
775 cmd.resp_type = MMC_RSP_R1;
778 err = mmc_send_cmd(mmc, &cmd, NULL);
785 /* Put the Card in Identify Mode */
786 cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
787 MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
788 cmd.resp_type = MMC_RSP_R2;
792 err = mmc_send_cmd(mmc, &cmd, NULL);
797 memcpy(mmc->cid, cmd.response, 16);
800 * For MMC cards, set the Relative Address.
801 * For SD cards, get the Relatvie Address.
802 * This also puts the cards into Standby State
804 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
805 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
806 cmd.cmdarg = mmc->rca << 16;
807 cmd.resp_type = MMC_RSP_R6;
810 err = mmc_send_cmd(mmc, &cmd, NULL);
816 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
819 /* Get the Card-Specific Data */
820 cmd.cmdidx = MMC_CMD_SEND_CSD;
821 cmd.resp_type = MMC_RSP_R2;
822 cmd.cmdarg = mmc->rca << 16;
825 err = mmc_send_cmd(mmc, &cmd, NULL);
827 /* Waiting for the ready status */
828 mmc_send_status(mmc, timeout);
833 mmc->csd[0] = cmd.response[0];
834 mmc->csd[1] = cmd.response[1];
835 mmc->csd[2] = cmd.response[2];
836 mmc->csd[3] = cmd.response[3];
838 if (mmc->version == MMC_VERSION_UNKNOWN) {
839 int version = (cmd.response[0] >> 26) & 0xf;
843 mmc->version = MMC_VERSION_1_2;
846 mmc->version = MMC_VERSION_1_4;
849 mmc->version = MMC_VERSION_2_2;
852 mmc->version = MMC_VERSION_3;
855 mmc->version = MMC_VERSION_4;
858 mmc->version = MMC_VERSION_1_2;
863 /* divide frequency by 10, since the mults are 10x bigger */
864 freq = fbase[(cmd.response[0] & 0x7)];
865 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
867 mmc->tran_speed = freq * mult;
869 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
872 mmc->write_bl_len = mmc->read_bl_len;
874 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
876 if (mmc->high_capacity) {
877 csize = (mmc->csd[1] & 0x3f) << 16
878 | (mmc->csd[2] & 0xffff0000) >> 16;
881 csize = (mmc->csd[1] & 0x3ff) << 2
882 | (mmc->csd[2] & 0xc0000000) >> 30;
883 cmult = (mmc->csd[2] & 0x00038000) >> 15;
886 mmc->capacity = (csize + 1) << (cmult + 2);
887 mmc->capacity *= mmc->read_bl_len;
889 if (mmc->read_bl_len > 512)
890 mmc->read_bl_len = 512;
892 if (mmc->write_bl_len > 512)
893 mmc->write_bl_len = 512;
895 /* Select the card, and put it into Transfer Mode */
896 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
897 cmd.cmdidx = MMC_CMD_SELECT_CARD;
898 cmd.resp_type = MMC_RSP_R1b;
899 cmd.cmdarg = mmc->rca << 16;
901 err = mmc_send_cmd(mmc, &cmd, NULL);
907 if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
908 /* check ext_csd version and capacity */
909 err = mmc_send_ext_csd(mmc, ext_csd);
910 if (!err & (ext_csd[192] >= 2)) {
911 mmc->capacity = ext_csd[212] << 0 | ext_csd[213] << 8 |
912 ext_csd[214] << 16 | ext_csd[215] << 24;
913 mmc->capacity *= 512;
918 err = sd_change_freq(mmc);
920 err = mmc_change_freq(mmc);
925 /* Restrict card's capabilities by what the host can do */
926 mmc->card_caps &= mmc->host_caps;
929 if (mmc->card_caps & MMC_MODE_4BIT) {
930 cmd.cmdidx = MMC_CMD_APP_CMD;
931 cmd.resp_type = MMC_RSP_R1;
932 cmd.cmdarg = mmc->rca << 16;
935 err = mmc_send_cmd(mmc, &cmd, NULL);
939 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
940 cmd.resp_type = MMC_RSP_R1;
943 err = mmc_send_cmd(mmc, &cmd, NULL);
947 mmc_set_bus_width(mmc, 4);
950 if (mmc->card_caps & MMC_MODE_HS)
951 mmc_set_clock(mmc, 50000000);
953 mmc_set_clock(mmc, 25000000);
955 if (mmc->card_caps & MMC_MODE_4BIT) {
956 /* Set the card to use 4 bit*/
957 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
959 EXT_CSD_BUS_WIDTH_4);
964 mmc_set_bus_width(mmc, 4);
965 } else if (mmc->card_caps & MMC_MODE_8BIT) {
966 /* Set the card to use 8 bit*/
967 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
969 EXT_CSD_BUS_WIDTH_8);
974 mmc_set_bus_width(mmc, 8);
977 if (mmc->card_caps & MMC_MODE_HS) {
978 if (mmc->card_caps & MMC_MODE_HS_52MHz)
979 mmc_set_clock(mmc, 52000000);
981 mmc_set_clock(mmc, 26000000);
983 mmc_set_clock(mmc, 20000000);
986 /* fill in device description */
987 mmc->block_dev.lun = 0;
988 mmc->block_dev.type = 0;
989 mmc->block_dev.blksz = mmc->read_bl_len;
990 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
991 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
992 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
993 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
994 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
995 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
996 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
997 (mmc->cid[2] >> 24) & 0xf);
998 init_part(&mmc->block_dev);
1003 int mmc_send_if_cond(struct mmc *mmc)
1008 cmd.cmdidx = SD_CMD_SEND_IF_COND;
1009 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
1010 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
1011 cmd.resp_type = MMC_RSP_R7;
1014 err = mmc_send_cmd(mmc, &cmd, NULL);
1019 if ((cmd.response[0] & 0xff) != 0xaa)
1020 return UNUSABLE_ERR;
1022 mmc->version = SD_VERSION_2;
1027 int mmc_register(struct mmc *mmc)
1029 /* Setup the universal parts of the block interface just once */
1030 mmc->block_dev.if_type = IF_TYPE_MMC;
1031 mmc->block_dev.dev = cur_dev_num++;
1032 mmc->block_dev.removable = 1;
1033 mmc->block_dev.block_read = mmc_bread;
1034 mmc->block_dev.block_write = mmc_bwrite;
1036 INIT_LIST_HEAD (&mmc->link);
1038 list_add_tail (&mmc->link, &mmc_devices);
1043 block_dev_desc_t *mmc_get_dev(int dev)
1045 struct mmc *mmc = find_mmc_device(dev);
1047 return mmc ? &mmc->block_dev : NULL;
1050 int mmc_init(struct mmc *mmc)
1054 err = mmc->init(mmc);
1059 mmc_set_bus_width(mmc, 1);
1060 mmc_set_clock(mmc, 1);
1062 /* Reset the Card */
1063 err = mmc_go_idle(mmc);
1068 /* Test for SD version 2 */
1069 err = mmc_send_if_cond(mmc);
1071 /* Now try to get the SD card's operating condition */
1072 err = sd_send_op_cond(mmc);
1074 /* If the command timed out, we check for an MMC card */
1075 if (err == TIMEOUT) {
1076 err = mmc_send_op_cond(mmc);
1079 printf("Card did not respond to voltage select!\n");
1080 return UNUSABLE_ERR;
1084 return mmc_startup(mmc);
1088 * CPU and board-specific MMC initializations. Aliased function
1089 * signals caller to move on
1091 static int __def_mmc_init(bd_t *bis)
1096 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1097 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1099 void print_mmc_devices(char separator)
1102 struct list_head *entry;
1104 list_for_each(entry, &mmc_devices) {
1105 m = list_entry(entry, struct mmc, link);
1107 printf("%s: %d", m->name, m->block_dev.dev);
1109 if (entry->next != &mmc_devices)
1110 printf("%c ", separator);
1116 int mmc_initialize(bd_t *bis)
1118 INIT_LIST_HEAD (&mmc_devices);
1121 if (board_mmc_init(bis) < 0)
1124 print_mmc_devices(',');