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 > mmc->b_max) ? mmc->b_max : blocks_todo;
247 if(mmc_write_blocks(mmc, start, cur, src) != cur)
251 src += cur * mmc->write_bl_len;
252 } while (blocks_todo > 0);
257 int mmc_read_blocks(struct mmc *mmc, void *dst, ulong start, lbaint_t blkcnt)
260 struct mmc_data data;
264 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
266 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
268 if (mmc->high_capacity)
271 cmd.cmdarg = start * mmc->read_bl_len;
273 cmd.resp_type = MMC_RSP_R1;
277 data.blocks = blkcnt;
278 data.blocksize = mmc->read_bl_len;
279 data.flags = MMC_DATA_READ;
281 if (mmc_send_cmd(mmc, &cmd, &data))
285 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
287 cmd.resp_type = MMC_RSP_R1b;
289 if (mmc_send_cmd(mmc, &cmd, NULL)) {
290 printf("mmc fail to send stop cmd\n");
294 /* Waiting for the ready status */
295 mmc_send_status(mmc, timeout);
301 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
303 lbaint_t cur, blocks_todo = blkcnt;
308 struct mmc *mmc = find_mmc_device(dev_num);
312 if ((start + blkcnt) > mmc->block_dev.lba) {
313 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
314 start + blkcnt, mmc->block_dev.lba);
318 if (mmc_set_blocklen(mmc, mmc->read_bl_len))
322 cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo;
323 if(mmc_read_blocks(mmc, dst, start, cur) != cur)
327 dst += cur * mmc->read_bl_len;
328 } while (blocks_todo > 0);
333 int mmc_go_idle(struct mmc* mmc)
340 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
342 cmd.resp_type = MMC_RSP_NONE;
345 err = mmc_send_cmd(mmc, &cmd, NULL);
356 sd_send_op_cond(struct mmc *mmc)
363 cmd.cmdidx = MMC_CMD_APP_CMD;
364 cmd.resp_type = MMC_RSP_R1;
368 err = mmc_send_cmd(mmc, &cmd, NULL);
373 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
374 cmd.resp_type = MMC_RSP_R3;
377 * Most cards do not answer if some reserved bits
378 * in the ocr are set. However, Some controller
379 * can set bit 7 (reserved for low voltages), but
380 * how to manage low voltages SD card is not yet
383 cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
384 (mmc->voltages & 0xff8000);
386 if (mmc->version == SD_VERSION_2)
387 cmd.cmdarg |= OCR_HCS;
389 err = mmc_send_cmd(mmc, &cmd, NULL);
395 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
400 if (mmc->version != SD_VERSION_2)
401 mmc->version = SD_VERSION_1_0;
403 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
404 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
405 cmd.resp_type = MMC_RSP_R3;
409 err = mmc_send_cmd(mmc, &cmd, NULL);
415 mmc->ocr = cmd.response[0];
417 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
423 int mmc_send_op_cond(struct mmc *mmc)
429 /* Some cards seem to need this */
432 /* Asking to the card its capabilities */
433 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
434 cmd.resp_type = MMC_RSP_R3;
438 err = mmc_send_cmd(mmc, &cmd, NULL);
446 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
447 cmd.resp_type = MMC_RSP_R3;
448 cmd.cmdarg = (mmc_host_is_spi(mmc) ? 0 :
450 (cmd.response[0] & OCR_VOLTAGE_MASK)) |
451 (cmd.response[0] & OCR_ACCESS_MODE));
454 err = mmc_send_cmd(mmc, &cmd, NULL);
460 } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
465 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
466 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
467 cmd.resp_type = MMC_RSP_R3;
471 err = mmc_send_cmd(mmc, &cmd, NULL);
477 mmc->version = MMC_VERSION_UNKNOWN;
478 mmc->ocr = cmd.response[0];
480 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
487 int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
490 struct mmc_data data;
493 /* Get the Card Status Register */
494 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
495 cmd.resp_type = MMC_RSP_R1;
501 data.blocksize = 512;
502 data.flags = MMC_DATA_READ;
504 err = mmc_send_cmd(mmc, &cmd, &data);
510 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
516 cmd.cmdidx = MMC_CMD_SWITCH;
517 cmd.resp_type = MMC_RSP_R1b;
518 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
523 ret = mmc_send_cmd(mmc, &cmd, NULL);
525 /* Waiting for the ready status */
526 mmc_send_status(mmc, timeout);
532 int mmc_change_freq(struct mmc *mmc)
540 if (mmc_host_is_spi(mmc))
543 /* Only version 4 supports high-speed */
544 if (mmc->version < MMC_VERSION_4)
547 mmc->card_caps |= MMC_MODE_4BIT;
549 err = mmc_send_ext_csd(mmc, ext_csd);
554 cardtype = ext_csd[196] & 0xf;
556 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
561 /* Now check to see that it worked */
562 err = mmc_send_ext_csd(mmc, ext_csd);
567 /* No high-speed support */
571 /* High Speed is set, there are two types: 52MHz and 26MHz */
572 if (cardtype & MMC_HS_52MHZ)
573 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
575 mmc->card_caps |= MMC_MODE_HS;
580 int mmc_switch_part(int dev_num, unsigned int part_num)
582 struct mmc *mmc = find_mmc_device(dev_num);
587 return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
588 (mmc->part_config & ~PART_ACCESS_MASK)
589 | (part_num & PART_ACCESS_MASK));
592 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
595 struct mmc_data data;
597 /* Switch the frequency */
598 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
599 cmd.resp_type = MMC_RSP_R1;
600 cmd.cmdarg = (mode << 31) | 0xffffff;
601 cmd.cmdarg &= ~(0xf << (group * 4));
602 cmd.cmdarg |= value << (group * 4);
605 data.dest = (char *)resp;
608 data.flags = MMC_DATA_READ;
610 return mmc_send_cmd(mmc, &cmd, &data);
614 int sd_change_freq(struct mmc *mmc)
619 uint switch_status[16];
620 struct mmc_data data;
625 if (mmc_host_is_spi(mmc))
628 /* Read the SCR to find out if this card supports higher speeds */
629 cmd.cmdidx = MMC_CMD_APP_CMD;
630 cmd.resp_type = MMC_RSP_R1;
631 cmd.cmdarg = mmc->rca << 16;
634 err = mmc_send_cmd(mmc, &cmd, NULL);
639 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
640 cmd.resp_type = MMC_RSP_R1;
647 data.dest = (char *)&scr;
650 data.flags = MMC_DATA_READ;
652 err = mmc_send_cmd(mmc, &cmd, &data);
661 mmc->scr[0] = __be32_to_cpu(scr[0]);
662 mmc->scr[1] = __be32_to_cpu(scr[1]);
664 switch ((mmc->scr[0] >> 24) & 0xf) {
666 mmc->version = SD_VERSION_1_0;
669 mmc->version = SD_VERSION_1_10;
672 mmc->version = SD_VERSION_2;
675 mmc->version = SD_VERSION_1_0;
679 if (mmc->scr[0] & SD_DATA_4BIT)
680 mmc->card_caps |= MMC_MODE_4BIT;
682 /* Version 1.0 doesn't support switching */
683 if (mmc->version == SD_VERSION_1_0)
688 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
689 (u8 *)&switch_status);
694 /* The high-speed function is busy. Try again */
695 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
699 /* If high-speed isn't supported, we return */
700 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
703 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status);
708 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
709 mmc->card_caps |= MMC_MODE_HS;
714 /* frequency bases */
715 /* divided by 10 to be nice to platforms without floating point */
716 static const int fbase[] = {
723 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
724 * to platforms without floating point.
726 static const int multipliers[] = {
745 void mmc_set_ios(struct mmc *mmc)
750 void mmc_set_clock(struct mmc *mmc, uint clock)
752 if (clock > mmc->f_max)
755 if (clock < mmc->f_min)
763 void mmc_set_bus_width(struct mmc *mmc, uint width)
765 mmc->bus_width = width;
770 int mmc_startup(struct mmc *mmc)
779 #ifdef CONFIG_MMC_SPI_CRC_ON
780 if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
781 cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
782 cmd.resp_type = MMC_RSP_R1;
785 err = mmc_send_cmd(mmc, &cmd, NULL);
792 /* Put the Card in Identify Mode */
793 cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
794 MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
795 cmd.resp_type = MMC_RSP_R2;
799 err = mmc_send_cmd(mmc, &cmd, NULL);
804 memcpy(mmc->cid, cmd.response, 16);
807 * For MMC cards, set the Relative Address.
808 * For SD cards, get the Relatvie Address.
809 * This also puts the cards into Standby State
811 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
812 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
813 cmd.cmdarg = mmc->rca << 16;
814 cmd.resp_type = MMC_RSP_R6;
817 err = mmc_send_cmd(mmc, &cmd, NULL);
823 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
826 /* Get the Card-Specific Data */
827 cmd.cmdidx = MMC_CMD_SEND_CSD;
828 cmd.resp_type = MMC_RSP_R2;
829 cmd.cmdarg = mmc->rca << 16;
832 err = mmc_send_cmd(mmc, &cmd, NULL);
834 /* Waiting for the ready status */
835 mmc_send_status(mmc, timeout);
840 mmc->csd[0] = cmd.response[0];
841 mmc->csd[1] = cmd.response[1];
842 mmc->csd[2] = cmd.response[2];
843 mmc->csd[3] = cmd.response[3];
845 if (mmc->version == MMC_VERSION_UNKNOWN) {
846 int version = (cmd.response[0] >> 26) & 0xf;
850 mmc->version = MMC_VERSION_1_2;
853 mmc->version = MMC_VERSION_1_4;
856 mmc->version = MMC_VERSION_2_2;
859 mmc->version = MMC_VERSION_3;
862 mmc->version = MMC_VERSION_4;
865 mmc->version = MMC_VERSION_1_2;
870 /* divide frequency by 10, since the mults are 10x bigger */
871 freq = fbase[(cmd.response[0] & 0x7)];
872 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
874 mmc->tran_speed = freq * mult;
876 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
879 mmc->write_bl_len = mmc->read_bl_len;
881 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
883 if (mmc->high_capacity) {
884 csize = (mmc->csd[1] & 0x3f) << 16
885 | (mmc->csd[2] & 0xffff0000) >> 16;
888 csize = (mmc->csd[1] & 0x3ff) << 2
889 | (mmc->csd[2] & 0xc0000000) >> 30;
890 cmult = (mmc->csd[2] & 0x00038000) >> 15;
893 mmc->capacity = (csize + 1) << (cmult + 2);
894 mmc->capacity *= mmc->read_bl_len;
896 if (mmc->read_bl_len > 512)
897 mmc->read_bl_len = 512;
899 if (mmc->write_bl_len > 512)
900 mmc->write_bl_len = 512;
902 /* Select the card, and put it into Transfer Mode */
903 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
904 cmd.cmdidx = MMC_CMD_SELECT_CARD;
905 cmd.resp_type = MMC_RSP_R1b;
906 cmd.cmdarg = mmc->rca << 16;
908 err = mmc_send_cmd(mmc, &cmd, NULL);
914 mmc->part_config = MMCPART_NOAVAILABLE;
915 if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
916 /* check ext_csd version and capacity */
917 err = mmc_send_ext_csd(mmc, ext_csd);
918 if (!err & (ext_csd[192] >= 2)) {
919 mmc->capacity = ext_csd[212] << 0 | ext_csd[213] << 8 |
920 ext_csd[214] << 16 | ext_csd[215] << 24;
921 mmc->capacity *= 512;
924 /* store the partition info of emmc */
925 if (ext_csd[160] & PART_SUPPORT)
926 mmc->part_config = ext_csd[179];
930 err = sd_change_freq(mmc);
932 err = mmc_change_freq(mmc);
937 /* Restrict card's capabilities by what the host can do */
938 mmc->card_caps &= mmc->host_caps;
941 if (mmc->card_caps & MMC_MODE_4BIT) {
942 cmd.cmdidx = MMC_CMD_APP_CMD;
943 cmd.resp_type = MMC_RSP_R1;
944 cmd.cmdarg = mmc->rca << 16;
947 err = mmc_send_cmd(mmc, &cmd, NULL);
951 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
952 cmd.resp_type = MMC_RSP_R1;
955 err = mmc_send_cmd(mmc, &cmd, NULL);
959 mmc_set_bus_width(mmc, 4);
962 if (mmc->card_caps & MMC_MODE_HS)
963 mmc_set_clock(mmc, 50000000);
965 mmc_set_clock(mmc, 25000000);
967 if (mmc->card_caps & MMC_MODE_4BIT) {
968 /* Set the card to use 4 bit*/
969 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
971 EXT_CSD_BUS_WIDTH_4);
976 mmc_set_bus_width(mmc, 4);
977 } else if (mmc->card_caps & MMC_MODE_8BIT) {
978 /* Set the card to use 8 bit*/
979 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
981 EXT_CSD_BUS_WIDTH_8);
986 mmc_set_bus_width(mmc, 8);
989 if (mmc->card_caps & MMC_MODE_HS) {
990 if (mmc->card_caps & MMC_MODE_HS_52MHz)
991 mmc_set_clock(mmc, 52000000);
993 mmc_set_clock(mmc, 26000000);
995 mmc_set_clock(mmc, 20000000);
998 /* fill in device description */
999 mmc->block_dev.lun = 0;
1000 mmc->block_dev.type = 0;
1001 mmc->block_dev.blksz = mmc->read_bl_len;
1002 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
1003 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
1004 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
1005 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
1006 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
1007 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
1008 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
1009 (mmc->cid[2] >> 24) & 0xf);
1010 init_part(&mmc->block_dev);
1015 int mmc_send_if_cond(struct mmc *mmc)
1020 cmd.cmdidx = SD_CMD_SEND_IF_COND;
1021 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
1022 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
1023 cmd.resp_type = MMC_RSP_R7;
1026 err = mmc_send_cmd(mmc, &cmd, NULL);
1031 if ((cmd.response[0] & 0xff) != 0xaa)
1032 return UNUSABLE_ERR;
1034 mmc->version = SD_VERSION_2;
1039 int mmc_register(struct mmc *mmc)
1041 /* Setup the universal parts of the block interface just once */
1042 mmc->block_dev.if_type = IF_TYPE_MMC;
1043 mmc->block_dev.dev = cur_dev_num++;
1044 mmc->block_dev.removable = 1;
1045 mmc->block_dev.block_read = mmc_bread;
1046 mmc->block_dev.block_write = mmc_bwrite;
1048 mmc->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
1050 INIT_LIST_HEAD (&mmc->link);
1052 list_add_tail (&mmc->link, &mmc_devices);
1057 block_dev_desc_t *mmc_get_dev(int dev)
1059 struct mmc *mmc = find_mmc_device(dev);
1061 return mmc ? &mmc->block_dev : NULL;
1064 int mmc_init(struct mmc *mmc)
1071 err = mmc->init(mmc);
1076 mmc_set_bus_width(mmc, 1);
1077 mmc_set_clock(mmc, 1);
1079 /* Reset the Card */
1080 err = mmc_go_idle(mmc);
1085 /* The internal partition reset to user partition(0) at every CMD0*/
1088 /* Test for SD version 2 */
1089 err = mmc_send_if_cond(mmc);
1091 /* Now try to get the SD card's operating condition */
1092 err = sd_send_op_cond(mmc);
1094 /* If the command timed out, we check for an MMC card */
1095 if (err == TIMEOUT) {
1096 err = mmc_send_op_cond(mmc);
1099 printf("Card did not respond to voltage select!\n");
1100 return UNUSABLE_ERR;
1104 err = mmc_startup(mmc);
1113 * CPU and board-specific MMC initializations. Aliased function
1114 * signals caller to move on
1116 static int __def_mmc_init(bd_t *bis)
1121 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1122 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
1124 void print_mmc_devices(char separator)
1127 struct list_head *entry;
1129 list_for_each(entry, &mmc_devices) {
1130 m = list_entry(entry, struct mmc, link);
1132 printf("%s: %d", m->name, m->block_dev.dev);
1134 if (entry->next != &mmc_devices)
1135 printf("%c ", separator);
1141 int get_mmc_num(void)
1146 int mmc_initialize(bd_t *bis)
1148 INIT_LIST_HEAD (&mmc_devices);
1151 if (board_mmc_init(bis) < 0)
1154 print_mmc_devices(',');