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_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
87 struct mmc *mmc = find_mmc_device(dev_num);
93 blklen = mmc->write_bl_len;
95 if ((start + blkcnt) > mmc->block_dev.lba) {
96 printf("MMC: block number 0x%lx exceeds max(0x%lx)",
97 start + blkcnt, mmc->block_dev.lba);
100 err = mmc_set_blocklen(mmc, mmc->write_bl_len);
103 printf("set write bl len failed\n\r");
108 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
110 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
112 if (mmc->high_capacity)
115 cmd.cmdarg = start * blklen;
117 cmd.resp_type = MMC_RSP_R1;
121 data.blocks = blkcnt;
122 data.blocksize = blklen;
123 data.flags = MMC_DATA_WRITE;
125 err = mmc_send_cmd(mmc, &cmd, &data);
128 printf("mmc write failed\n\r");
133 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
135 cmd.resp_type = MMC_RSP_R1b;
137 stoperr = mmc_send_cmd(mmc, &cmd, NULL);
143 int mmc_read_block(struct mmc *mmc, void *dst, uint blocknum)
146 struct mmc_data data;
148 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
150 if (mmc->high_capacity)
151 cmd.cmdarg = blocknum;
153 cmd.cmdarg = blocknum * mmc->read_bl_len;
155 cmd.resp_type = MMC_RSP_R1;
160 data.blocksize = mmc->read_bl_len;
161 data.flags = MMC_DATA_READ;
163 return mmc_send_cmd(mmc, &cmd, &data);
166 int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size)
170 int blklen = mmc->read_bl_len;
171 int startblock = lldiv(src, mmc->read_bl_len);
172 int endblock = lldiv(src + size - 1, mmc->read_bl_len);
175 /* Make a buffer big enough to hold all the blocks we might read */
176 buffer = malloc(blklen);
179 printf("Could not allocate buffer for MMC read!\n");
183 /* We always do full block reads from the card */
184 err = mmc_set_blocklen(mmc, mmc->read_bl_len);
189 for (i = startblock; i <= endblock; i++) {
193 err = mmc_read_block(mmc, buffer, i);
199 * The first block may not be aligned, so we
200 * copy from the desired point in the block
202 offset = (src & (blklen - 1));
203 segment_size = MIN(blklen - offset, size);
205 memcpy(dst, buffer + offset, segment_size);
209 size -= segment_size;
218 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
222 struct mmc *mmc = find_mmc_device(dev_num);
227 if ((start + blkcnt) > mmc->block_dev.lba) {
228 printf("MMC: block number 0x%lx exceeds max(0x%lx)",
229 start + blkcnt, mmc->block_dev.lba);
232 /* We always do full block reads from the card */
233 err = mmc_set_blocklen(mmc, mmc->read_bl_len);
239 for (i = start; i < start + blkcnt; i++, dst += mmc->read_bl_len) {
240 err = mmc_read_block(mmc, dst, i);
243 printf("block read failed: %d\n", err);
251 int mmc_go_idle(struct mmc* mmc)
258 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
260 cmd.resp_type = MMC_RSP_NONE;
263 err = mmc_send_cmd(mmc, &cmd, NULL);
274 sd_send_op_cond(struct mmc *mmc)
281 cmd.cmdidx = MMC_CMD_APP_CMD;
282 cmd.resp_type = MMC_RSP_R1;
286 err = mmc_send_cmd(mmc, &cmd, NULL);
291 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
292 cmd.resp_type = MMC_RSP_R3;
295 * Most cards do not answer if some reserved bits
296 * in the ocr are set. However, Some controller
297 * can set bit 7 (reserved for low voltages), but
298 * how to manage low voltages SD card is not yet
301 cmd.cmdarg = mmc->voltages & 0xff8000;
303 if (mmc->version == SD_VERSION_2)
304 cmd.cmdarg |= OCR_HCS;
306 err = mmc_send_cmd(mmc, &cmd, NULL);
312 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
317 if (mmc->version != SD_VERSION_2)
318 mmc->version = SD_VERSION_1_0;
320 mmc->ocr = cmd.response[0];
322 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
328 int mmc_send_op_cond(struct mmc *mmc)
334 /* Some cards seem to need this */
338 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
339 cmd.resp_type = MMC_RSP_R3;
340 cmd.cmdarg = OCR_HCS | mmc->voltages;
343 err = mmc_send_cmd(mmc, &cmd, NULL);
349 } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
354 mmc->version = MMC_VERSION_UNKNOWN;
355 mmc->ocr = cmd.response[0];
357 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
364 int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
367 struct mmc_data data;
370 /* Get the Card Status Register */
371 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
372 cmd.resp_type = MMC_RSP_R1;
378 data.blocksize = 512;
379 data.flags = MMC_DATA_READ;
381 err = mmc_send_cmd(mmc, &cmd, &data);
387 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
391 cmd.cmdidx = MMC_CMD_SWITCH;
392 cmd.resp_type = MMC_RSP_R1b;
393 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
398 return mmc_send_cmd(mmc, &cmd, NULL);
401 int mmc_change_freq(struct mmc *mmc)
409 /* Only version 4 supports high-speed */
410 if (mmc->version < MMC_VERSION_4)
413 mmc->card_caps |= MMC_MODE_4BIT;
415 err = mmc_send_ext_csd(mmc, ext_csd);
420 if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215])
421 mmc->high_capacity = 1;
423 cardtype = ext_csd[196] & 0xf;
425 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
430 /* Now check to see that it worked */
431 err = mmc_send_ext_csd(mmc, ext_csd);
436 /* No high-speed support */
440 /* High Speed is set, there are two types: 52MHz and 26MHz */
441 if (cardtype & MMC_HS_52MHZ)
442 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
444 mmc->card_caps |= MMC_MODE_HS;
449 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
452 struct mmc_data data;
454 /* Switch the frequency */
455 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
456 cmd.resp_type = MMC_RSP_R1;
457 cmd.cmdarg = (mode << 31) | 0xffffff;
458 cmd.cmdarg &= ~(0xf << (group * 4));
459 cmd.cmdarg |= value << (group * 4);
462 data.dest = (char *)resp;
465 data.flags = MMC_DATA_READ;
467 return mmc_send_cmd(mmc, &cmd, &data);
471 int sd_change_freq(struct mmc *mmc)
476 uint switch_status[16];
477 struct mmc_data data;
482 /* Read the SCR to find out if this card supports higher speeds */
483 cmd.cmdidx = MMC_CMD_APP_CMD;
484 cmd.resp_type = MMC_RSP_R1;
485 cmd.cmdarg = mmc->rca << 16;
488 err = mmc_send_cmd(mmc, &cmd, NULL);
493 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
494 cmd.resp_type = MMC_RSP_R1;
501 data.dest = (char *)&scr;
504 data.flags = MMC_DATA_READ;
506 err = mmc_send_cmd(mmc, &cmd, &data);
515 mmc->scr[0] = __be32_to_cpu(scr[0]);
516 mmc->scr[1] = __be32_to_cpu(scr[1]);
518 switch ((mmc->scr[0] >> 24) & 0xf) {
520 mmc->version = SD_VERSION_1_0;
523 mmc->version = SD_VERSION_1_10;
526 mmc->version = SD_VERSION_2;
529 mmc->version = SD_VERSION_1_0;
533 /* Version 1.0 doesn't support switching */
534 if (mmc->version == SD_VERSION_1_0)
539 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
540 (u8 *)&switch_status);
545 /* The high-speed function is busy. Try again */
546 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
550 if (mmc->scr[0] & SD_DATA_4BIT)
551 mmc->card_caps |= MMC_MODE_4BIT;
553 /* If high-speed isn't supported, we return */
554 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
557 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status);
562 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
563 mmc->card_caps |= MMC_MODE_HS;
568 /* frequency bases */
569 /* divided by 10 to be nice to platforms without floating point */
577 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
578 * to platforms without floating point.
580 int multipliers[] = {
599 void mmc_set_ios(struct mmc *mmc)
604 void mmc_set_clock(struct mmc *mmc, uint clock)
606 if (clock > mmc->f_max)
609 if (clock < mmc->f_min)
617 void mmc_set_bus_width(struct mmc *mmc, uint width)
619 mmc->bus_width = width;
624 int mmc_startup(struct mmc *mmc)
631 /* Put the Card in Identify Mode */
632 cmd.cmdidx = MMC_CMD_ALL_SEND_CID;
633 cmd.resp_type = MMC_RSP_R2;
637 err = mmc_send_cmd(mmc, &cmd, NULL);
642 memcpy(mmc->cid, cmd.response, 16);
645 * For MMC cards, set the Relative Address.
646 * For SD cards, get the Relatvie Address.
647 * This also puts the cards into Standby State
649 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
650 cmd.cmdarg = mmc->rca << 16;
651 cmd.resp_type = MMC_RSP_R6;
654 err = mmc_send_cmd(mmc, &cmd, NULL);
660 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
662 /* Get the Card-Specific Data */
663 cmd.cmdidx = MMC_CMD_SEND_CSD;
664 cmd.resp_type = MMC_RSP_R2;
665 cmd.cmdarg = mmc->rca << 16;
668 err = mmc_send_cmd(mmc, &cmd, NULL);
673 mmc->csd[0] = cmd.response[0];
674 mmc->csd[1] = cmd.response[1];
675 mmc->csd[2] = cmd.response[2];
676 mmc->csd[3] = cmd.response[3];
678 if (mmc->version == MMC_VERSION_UNKNOWN) {
679 int version = (cmd.response[0] >> 26) & 0xf;
683 mmc->version = MMC_VERSION_1_2;
686 mmc->version = MMC_VERSION_1_4;
689 mmc->version = MMC_VERSION_2_2;
692 mmc->version = MMC_VERSION_3;
695 mmc->version = MMC_VERSION_4;
698 mmc->version = MMC_VERSION_1_2;
703 /* divide frequency by 10, since the mults are 10x bigger */
704 freq = fbase[(cmd.response[0] & 0x7)];
705 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
707 mmc->tran_speed = freq * mult;
709 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
712 mmc->write_bl_len = mmc->read_bl_len;
714 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
716 if (mmc->high_capacity) {
717 csize = (mmc->csd[1] & 0x3f) << 16
718 | (mmc->csd[2] & 0xffff0000) >> 16;
721 csize = (mmc->csd[1] & 0x3ff) << 2
722 | (mmc->csd[2] & 0xc0000000) >> 30;
723 cmult = (mmc->csd[2] & 0x00038000) >> 15;
726 mmc->capacity = (csize + 1) << (cmult + 2);
727 mmc->capacity *= mmc->read_bl_len;
729 if (mmc->read_bl_len > 512)
730 mmc->read_bl_len = 512;
732 if (mmc->write_bl_len > 512)
733 mmc->write_bl_len = 512;
735 /* Select the card, and put it into Transfer Mode */
736 cmd.cmdidx = MMC_CMD_SELECT_CARD;
737 cmd.resp_type = MMC_RSP_R1b;
738 cmd.cmdarg = mmc->rca << 16;
740 err = mmc_send_cmd(mmc, &cmd, NULL);
746 err = sd_change_freq(mmc);
748 err = mmc_change_freq(mmc);
753 /* Restrict card's capabilities by what the host can do */
754 mmc->card_caps &= mmc->host_caps;
757 if (mmc->card_caps & MMC_MODE_4BIT) {
758 cmd.cmdidx = MMC_CMD_APP_CMD;
759 cmd.resp_type = MMC_RSP_R1;
760 cmd.cmdarg = mmc->rca << 16;
763 err = mmc_send_cmd(mmc, &cmd, NULL);
767 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
768 cmd.resp_type = MMC_RSP_R1;
771 err = mmc_send_cmd(mmc, &cmd, NULL);
775 mmc_set_bus_width(mmc, 4);
778 if (mmc->card_caps & MMC_MODE_HS)
779 mmc_set_clock(mmc, 50000000);
781 mmc_set_clock(mmc, 25000000);
783 if (mmc->card_caps & MMC_MODE_4BIT) {
784 /* Set the card to use 4 bit*/
785 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
787 EXT_CSD_BUS_WIDTH_4);
792 mmc_set_bus_width(mmc, 4);
793 } else if (mmc->card_caps & MMC_MODE_8BIT) {
794 /* Set the card to use 8 bit*/
795 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
797 EXT_CSD_BUS_WIDTH_8);
802 mmc_set_bus_width(mmc, 8);
805 if (mmc->card_caps & MMC_MODE_HS) {
806 if (mmc->card_caps & MMC_MODE_HS_52MHz)
807 mmc_set_clock(mmc, 52000000);
809 mmc_set_clock(mmc, 26000000);
811 mmc_set_clock(mmc, 20000000);
814 /* fill in device description */
815 mmc->block_dev.lun = 0;
816 mmc->block_dev.type = 0;
817 mmc->block_dev.blksz = mmc->read_bl_len;
818 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
819 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
820 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
821 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
822 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
823 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
824 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
825 (mmc->cid[2] >> 24) & 0xf);
826 init_part(&mmc->block_dev);
831 int mmc_send_if_cond(struct mmc *mmc)
836 cmd.cmdidx = SD_CMD_SEND_IF_COND;
837 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
838 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
839 cmd.resp_type = MMC_RSP_R7;
842 err = mmc_send_cmd(mmc, &cmd, NULL);
847 if ((cmd.response[0] & 0xff) != 0xaa)
850 mmc->version = SD_VERSION_2;
855 int mmc_register(struct mmc *mmc)
857 /* Setup the universal parts of the block interface just once */
858 mmc->block_dev.if_type = IF_TYPE_MMC;
859 mmc->block_dev.dev = cur_dev_num++;
860 mmc->block_dev.removable = 1;
861 mmc->block_dev.block_read = mmc_bread;
862 mmc->block_dev.block_write = mmc_bwrite;
864 INIT_LIST_HEAD (&mmc->link);
866 list_add_tail (&mmc->link, &mmc_devices);
871 block_dev_desc_t *mmc_get_dev(int dev)
873 struct mmc *mmc = find_mmc_device(dev);
875 return mmc ? &mmc->block_dev : NULL;
878 int mmc_init(struct mmc *mmc)
882 err = mmc->init(mmc);
887 mmc_set_bus_width(mmc, 1);
888 mmc_set_clock(mmc, 1);
891 err = mmc_go_idle(mmc);
896 /* Test for SD version 2 */
897 err = mmc_send_if_cond(mmc);
899 /* Now try to get the SD card's operating condition */
900 err = sd_send_op_cond(mmc);
902 /* If the command timed out, we check for an MMC card */
903 if (err == TIMEOUT) {
904 err = mmc_send_op_cond(mmc);
907 printf("Card did not respond to voltage select!\n");
912 return mmc_startup(mmc);
916 * CPU and board-specific MMC initializations. Aliased function
917 * signals caller to move on
919 static int __def_mmc_init(bd_t *bis)
924 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
925 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
927 void print_mmc_devices(char separator)
930 struct list_head *entry;
932 list_for_each(entry, &mmc_devices) {
933 m = list_entry(entry, struct mmc, link);
935 printf("%s: %d", m->name, m->block_dev.dev);
937 if (entry->next != &mmc_devices)
938 printf("%c ", separator);
944 int mmc_initialize(bd_t *bis)
946 INIT_LIST_HEAD (&mmc_devices);
949 if (board_mmc_init(bis) < 0)
952 print_mmc_devices(',');