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>
36 static struct list_head mmc_devices;
37 static int cur_dev_num = -1;
39 int __board_mmc_getcd(u8 *cd, struct mmc *mmc) {
43 int board_mmc_getcd(u8 *cd, struct mmc *mmc)__attribute__((weak,
44 alias("__board_mmc_getcd")));
46 int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
48 return mmc->send_cmd(mmc, cmd, data);
51 int mmc_set_blocklen(struct mmc *mmc, int len)
55 cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
56 cmd.resp_type = MMC_RSP_R1;
60 return mmc_send_cmd(mmc, &cmd, NULL);
63 struct mmc *find_mmc_device(int dev_num)
66 struct list_head *entry;
68 list_for_each(entry, &mmc_devices) {
69 m = list_entry(entry, struct mmc, link);
71 if (m->block_dev.dev == dev_num)
75 printf("MMC Device %d not found\n", dev_num);
81 mmc_write_blocks(struct mmc *mmc, ulong start, lbaint_t blkcnt, const void*src)
86 if ((start + blkcnt) > mmc->block_dev.lba) {
87 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
88 start + blkcnt, mmc->block_dev.lba);
93 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
95 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
97 if (mmc->high_capacity)
100 cmd.cmdarg = start * mmc->write_bl_len;
102 cmd.resp_type = MMC_RSP_R1;
106 data.blocks = blkcnt;
107 data.blocksize = mmc->write_bl_len;
108 data.flags = MMC_DATA_WRITE;
110 if (mmc_send_cmd(mmc, &cmd, &data)) {
111 printf("mmc write failed\n");
116 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
118 cmd.resp_type = MMC_RSP_R1b;
120 if (mmc_send_cmd(mmc, &cmd, NULL)) {
121 printf("mmc fail to send stop cmd\n");
130 mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
132 lbaint_t cur, blocks_todo = blkcnt;
134 struct mmc *mmc = find_mmc_device(dev_num);
138 if (mmc_set_blocklen(mmc, mmc->write_bl_len))
143 * The 65535 constraint comes from some hardware has
144 * only 16 bit width block number counter
146 cur = (blocks_todo > 65535) ? 65535 : blocks_todo;
147 if(mmc_write_blocks(mmc, start, cur, src) != cur)
151 src += cur * mmc->write_bl_len;
152 } while (blocks_todo > 0);
157 int mmc_read_block(struct mmc *mmc, void *dst, uint blocknum)
160 struct mmc_data data;
162 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
164 if (mmc->high_capacity)
165 cmd.cmdarg = blocknum;
167 cmd.cmdarg = blocknum * mmc->read_bl_len;
169 cmd.resp_type = MMC_RSP_R1;
174 data.blocksize = mmc->read_bl_len;
175 data.flags = MMC_DATA_READ;
177 return mmc_send_cmd(mmc, &cmd, &data);
180 int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size)
184 int blklen = mmc->read_bl_len;
185 int startblock = lldiv(src, mmc->read_bl_len);
186 int endblock = lldiv(src + size - 1, mmc->read_bl_len);
189 /* Make a buffer big enough to hold all the blocks we might read */
190 buffer = malloc(blklen);
193 printf("Could not allocate buffer for MMC read!\n");
197 /* We always do full block reads from the card */
198 err = mmc_set_blocklen(mmc, mmc->read_bl_len);
203 for (i = startblock; i <= endblock; i++) {
207 err = mmc_read_block(mmc, buffer, i);
213 * The first block may not be aligned, so we
214 * copy from the desired point in the block
216 offset = (src & (blklen - 1));
217 segment_size = MIN(blklen - offset, size);
219 memcpy(dst, buffer + offset, segment_size);
223 size -= segment_size;
232 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
236 struct mmc *mmc = find_mmc_device(dev_num);
241 if ((start + blkcnt) > mmc->block_dev.lba) {
242 printf("MMC: block number 0x%lx exceeds max(0x%lx)",
243 start + blkcnt, mmc->block_dev.lba);
246 /* We always do full block reads from the card */
247 err = mmc_set_blocklen(mmc, mmc->read_bl_len);
253 for (i = start; i < start + blkcnt; i++, dst += mmc->read_bl_len) {
254 err = mmc_read_block(mmc, dst, i);
257 printf("block read failed: %d\n", err);
265 int mmc_go_idle(struct mmc* mmc)
272 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
274 cmd.resp_type = MMC_RSP_NONE;
277 err = mmc_send_cmd(mmc, &cmd, NULL);
288 sd_send_op_cond(struct mmc *mmc)
295 cmd.cmdidx = MMC_CMD_APP_CMD;
296 cmd.resp_type = MMC_RSP_R1;
300 err = mmc_send_cmd(mmc, &cmd, NULL);
305 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
306 cmd.resp_type = MMC_RSP_R3;
309 * Most cards do not answer if some reserved bits
310 * in the ocr are set. However, Some controller
311 * can set bit 7 (reserved for low voltages), but
312 * how to manage low voltages SD card is not yet
315 cmd.cmdarg = mmc->voltages & 0xff8000;
317 if (mmc->version == SD_VERSION_2)
318 cmd.cmdarg |= OCR_HCS;
320 err = mmc_send_cmd(mmc, &cmd, NULL);
326 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
331 if (mmc->version != SD_VERSION_2)
332 mmc->version = SD_VERSION_1_0;
334 mmc->ocr = cmd.response[0];
336 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
342 int mmc_send_op_cond(struct mmc *mmc)
348 /* Some cards seem to need this */
352 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
353 cmd.resp_type = MMC_RSP_R3;
354 cmd.cmdarg = OCR_HCS | mmc->voltages;
357 err = mmc_send_cmd(mmc, &cmd, NULL);
363 } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
368 mmc->version = MMC_VERSION_UNKNOWN;
369 mmc->ocr = cmd.response[0];
371 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
378 int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
381 struct mmc_data data;
384 /* Get the Card Status Register */
385 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
386 cmd.resp_type = MMC_RSP_R1;
392 data.blocksize = 512;
393 data.flags = MMC_DATA_READ;
395 err = mmc_send_cmd(mmc, &cmd, &data);
401 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
405 cmd.cmdidx = MMC_CMD_SWITCH;
406 cmd.resp_type = MMC_RSP_R1b;
407 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
412 return mmc_send_cmd(mmc, &cmd, NULL);
415 int mmc_change_freq(struct mmc *mmc)
423 /* Only version 4 supports high-speed */
424 if (mmc->version < MMC_VERSION_4)
427 mmc->card_caps |= MMC_MODE_4BIT;
429 err = mmc_send_ext_csd(mmc, ext_csd);
434 if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215])
435 mmc->high_capacity = 1;
437 cardtype = ext_csd[196] & 0xf;
439 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
444 /* Now check to see that it worked */
445 err = mmc_send_ext_csd(mmc, ext_csd);
450 /* No high-speed support */
454 /* High Speed is set, there are two types: 52MHz and 26MHz */
455 if (cardtype & MMC_HS_52MHZ)
456 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
458 mmc->card_caps |= MMC_MODE_HS;
463 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
466 struct mmc_data data;
468 /* Switch the frequency */
469 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
470 cmd.resp_type = MMC_RSP_R1;
471 cmd.cmdarg = (mode << 31) | 0xffffff;
472 cmd.cmdarg &= ~(0xf << (group * 4));
473 cmd.cmdarg |= value << (group * 4);
476 data.dest = (char *)resp;
479 data.flags = MMC_DATA_READ;
481 return mmc_send_cmd(mmc, &cmd, &data);
485 int sd_change_freq(struct mmc *mmc)
490 uint switch_status[16];
491 struct mmc_data data;
496 /* Read the SCR to find out if this card supports higher speeds */
497 cmd.cmdidx = MMC_CMD_APP_CMD;
498 cmd.resp_type = MMC_RSP_R1;
499 cmd.cmdarg = mmc->rca << 16;
502 err = mmc_send_cmd(mmc, &cmd, NULL);
507 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
508 cmd.resp_type = MMC_RSP_R1;
515 data.dest = (char *)&scr;
518 data.flags = MMC_DATA_READ;
520 err = mmc_send_cmd(mmc, &cmd, &data);
529 mmc->scr[0] = __be32_to_cpu(scr[0]);
530 mmc->scr[1] = __be32_to_cpu(scr[1]);
532 switch ((mmc->scr[0] >> 24) & 0xf) {
534 mmc->version = SD_VERSION_1_0;
537 mmc->version = SD_VERSION_1_10;
540 mmc->version = SD_VERSION_2;
543 mmc->version = SD_VERSION_1_0;
547 /* Version 1.0 doesn't support switching */
548 if (mmc->version == SD_VERSION_1_0)
553 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
554 (u8 *)&switch_status);
559 /* The high-speed function is busy. Try again */
560 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
564 if (mmc->scr[0] & SD_DATA_4BIT)
565 mmc->card_caps |= MMC_MODE_4BIT;
567 /* If high-speed isn't supported, we return */
568 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
571 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status);
576 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
577 mmc->card_caps |= MMC_MODE_HS;
582 /* frequency bases */
583 /* divided by 10 to be nice to platforms without floating point */
591 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
592 * to platforms without floating point.
594 int multipliers[] = {
613 void mmc_set_ios(struct mmc *mmc)
618 void mmc_set_clock(struct mmc *mmc, uint clock)
620 if (clock > mmc->f_max)
623 if (clock < mmc->f_min)
631 void mmc_set_bus_width(struct mmc *mmc, uint width)
633 mmc->bus_width = width;
638 int mmc_startup(struct mmc *mmc)
646 /* Put the Card in Identify Mode */
647 cmd.cmdidx = MMC_CMD_ALL_SEND_CID;
648 cmd.resp_type = MMC_RSP_R2;
652 err = mmc_send_cmd(mmc, &cmd, NULL);
657 memcpy(mmc->cid, cmd.response, 16);
660 * For MMC cards, set the Relative Address.
661 * For SD cards, get the Relatvie Address.
662 * This also puts the cards into Standby State
664 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
665 cmd.cmdarg = mmc->rca << 16;
666 cmd.resp_type = MMC_RSP_R6;
669 err = mmc_send_cmd(mmc, &cmd, NULL);
675 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
677 /* Get the Card-Specific Data */
678 cmd.cmdidx = MMC_CMD_SEND_CSD;
679 cmd.resp_type = MMC_RSP_R2;
680 cmd.cmdarg = mmc->rca << 16;
683 err = mmc_send_cmd(mmc, &cmd, NULL);
688 mmc->csd[0] = cmd.response[0];
689 mmc->csd[1] = cmd.response[1];
690 mmc->csd[2] = cmd.response[2];
691 mmc->csd[3] = cmd.response[3];
693 if (mmc->version == MMC_VERSION_UNKNOWN) {
694 int version = (cmd.response[0] >> 26) & 0xf;
698 mmc->version = MMC_VERSION_1_2;
701 mmc->version = MMC_VERSION_1_4;
704 mmc->version = MMC_VERSION_2_2;
707 mmc->version = MMC_VERSION_3;
710 mmc->version = MMC_VERSION_4;
713 mmc->version = MMC_VERSION_1_2;
718 /* divide frequency by 10, since the mults are 10x bigger */
719 freq = fbase[(cmd.response[0] & 0x7)];
720 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
722 mmc->tran_speed = freq * mult;
724 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
727 mmc->write_bl_len = mmc->read_bl_len;
729 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
731 if (mmc->high_capacity) {
732 csize = (mmc->csd[1] & 0x3f) << 16
733 | (mmc->csd[2] & 0xffff0000) >> 16;
736 csize = (mmc->csd[1] & 0x3ff) << 2
737 | (mmc->csd[2] & 0xc0000000) >> 30;
738 cmult = (mmc->csd[2] & 0x00038000) >> 15;
741 mmc->capacity = (csize + 1) << (cmult + 2);
742 mmc->capacity *= mmc->read_bl_len;
744 if (mmc->read_bl_len > 512)
745 mmc->read_bl_len = 512;
747 if (mmc->write_bl_len > 512)
748 mmc->write_bl_len = 512;
750 /* Select the card, and put it into Transfer Mode */
751 cmd.cmdidx = MMC_CMD_SELECT_CARD;
752 cmd.resp_type = MMC_RSP_R1b;
753 cmd.cmdarg = mmc->rca << 16;
755 err = mmc_send_cmd(mmc, &cmd, NULL);
760 if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
761 /* check ext_csd version and capacity */
762 err = mmc_send_ext_csd(mmc, ext_csd);
763 if (!err & (ext_csd[192] >= 2)) {
764 mmc->capacity = ext_csd[212] << 0 | ext_csd[213] << 8 |
765 ext_csd[214] << 16 | ext_csd[215] << 24;
766 mmc->capacity *= 512;
771 err = sd_change_freq(mmc);
773 err = mmc_change_freq(mmc);
778 /* Restrict card's capabilities by what the host can do */
779 mmc->card_caps &= mmc->host_caps;
782 if (mmc->card_caps & MMC_MODE_4BIT) {
783 cmd.cmdidx = MMC_CMD_APP_CMD;
784 cmd.resp_type = MMC_RSP_R1;
785 cmd.cmdarg = mmc->rca << 16;
788 err = mmc_send_cmd(mmc, &cmd, NULL);
792 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
793 cmd.resp_type = MMC_RSP_R1;
796 err = mmc_send_cmd(mmc, &cmd, NULL);
800 mmc_set_bus_width(mmc, 4);
803 if (mmc->card_caps & MMC_MODE_HS)
804 mmc_set_clock(mmc, 50000000);
806 mmc_set_clock(mmc, 25000000);
808 if (mmc->card_caps & MMC_MODE_4BIT) {
809 /* Set the card to use 4 bit*/
810 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
812 EXT_CSD_BUS_WIDTH_4);
817 mmc_set_bus_width(mmc, 4);
818 } else if (mmc->card_caps & MMC_MODE_8BIT) {
819 /* Set the card to use 8 bit*/
820 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
822 EXT_CSD_BUS_WIDTH_8);
827 mmc_set_bus_width(mmc, 8);
830 if (mmc->card_caps & MMC_MODE_HS) {
831 if (mmc->card_caps & MMC_MODE_HS_52MHz)
832 mmc_set_clock(mmc, 52000000);
834 mmc_set_clock(mmc, 26000000);
836 mmc_set_clock(mmc, 20000000);
839 /* fill in device description */
840 mmc->block_dev.lun = 0;
841 mmc->block_dev.type = 0;
842 mmc->block_dev.blksz = mmc->read_bl_len;
843 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
844 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
845 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
846 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
847 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
848 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
849 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
850 (mmc->cid[2] >> 24) & 0xf);
851 init_part(&mmc->block_dev);
856 int mmc_send_if_cond(struct mmc *mmc)
861 cmd.cmdidx = SD_CMD_SEND_IF_COND;
862 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
863 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
864 cmd.resp_type = MMC_RSP_R7;
867 err = mmc_send_cmd(mmc, &cmd, NULL);
872 if ((cmd.response[0] & 0xff) != 0xaa)
875 mmc->version = SD_VERSION_2;
880 int mmc_register(struct mmc *mmc)
882 /* Setup the universal parts of the block interface just once */
883 mmc->block_dev.if_type = IF_TYPE_MMC;
884 mmc->block_dev.dev = cur_dev_num++;
885 mmc->block_dev.removable = 1;
886 mmc->block_dev.block_read = mmc_bread;
887 mmc->block_dev.block_write = mmc_bwrite;
889 INIT_LIST_HEAD (&mmc->link);
891 list_add_tail (&mmc->link, &mmc_devices);
896 block_dev_desc_t *mmc_get_dev(int dev)
898 struct mmc *mmc = find_mmc_device(dev);
900 return mmc ? &mmc->block_dev : NULL;
903 int mmc_init(struct mmc *mmc)
907 err = mmc->init(mmc);
912 mmc_set_bus_width(mmc, 1);
913 mmc_set_clock(mmc, 1);
916 err = mmc_go_idle(mmc);
921 /* Test for SD version 2 */
922 err = mmc_send_if_cond(mmc);
924 /* Now try to get the SD card's operating condition */
925 err = sd_send_op_cond(mmc);
927 /* If the command timed out, we check for an MMC card */
928 if (err == TIMEOUT) {
929 err = mmc_send_op_cond(mmc);
932 printf("Card did not respond to voltage select!\n");
937 return mmc_startup(mmc);
941 * CPU and board-specific MMC initializations. Aliased function
942 * signals caller to move on
944 static int __def_mmc_init(bd_t *bis)
949 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
950 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
952 void print_mmc_devices(char separator)
955 struct list_head *entry;
957 list_for_each(entry, &mmc_devices) {
958 m = list_entry(entry, struct mmc, link);
960 printf("%s: %d", m->name, m->block_dev.dev);
962 if (entry->next != &mmc_devices)
963 printf("%c ", separator);
969 int mmc_initialize(bd_t *bis)
971 INIT_LIST_HEAD (&mmc_devices);
974 if (board_mmc_init(bis) < 0)
977 print_mmc_devices(',');