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_blocks(struct mmc *mmc, void *dst, ulong start, lbaint_t blkcnt)
160 struct mmc_data data;
163 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
165 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
167 if (mmc->high_capacity)
170 cmd.cmdarg = start * mmc->read_bl_len;
172 cmd.resp_type = MMC_RSP_R1;
176 data.blocks = blkcnt;
177 data.blocksize = mmc->read_bl_len;
178 data.flags = MMC_DATA_READ;
180 if (mmc_send_cmd(mmc, &cmd, &data))
184 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
186 cmd.resp_type = MMC_RSP_R1b;
188 if (mmc_send_cmd(mmc, &cmd, NULL)) {
189 printf("mmc fail to send stop cmd\n");
197 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
199 lbaint_t cur, blocks_todo = blkcnt;
204 struct mmc *mmc = find_mmc_device(dev_num);
208 if ((start + blkcnt) > mmc->block_dev.lba) {
209 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
210 start + blkcnt, mmc->block_dev.lba);
214 if (mmc_set_blocklen(mmc, mmc->read_bl_len))
219 * The 65535 constraint comes from some hardware has
220 * only 16 bit width block number counter
222 cur = (blocks_todo > 65535) ? 65535 : blocks_todo;
223 if(mmc_read_blocks(mmc, dst, start, cur) != cur)
227 dst += cur * mmc->read_bl_len;
228 } while (blocks_todo > 0);
233 int mmc_go_idle(struct mmc* mmc)
240 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
242 cmd.resp_type = MMC_RSP_NONE;
245 err = mmc_send_cmd(mmc, &cmd, NULL);
256 sd_send_op_cond(struct mmc *mmc)
263 cmd.cmdidx = MMC_CMD_APP_CMD;
264 cmd.resp_type = MMC_RSP_R1;
268 err = mmc_send_cmd(mmc, &cmd, NULL);
273 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
274 cmd.resp_type = MMC_RSP_R3;
277 * Most cards do not answer if some reserved bits
278 * in the ocr are set. However, Some controller
279 * can set bit 7 (reserved for low voltages), but
280 * how to manage low voltages SD card is not yet
283 cmd.cmdarg = mmc->voltages & 0xff8000;
285 if (mmc->version == SD_VERSION_2)
286 cmd.cmdarg |= OCR_HCS;
288 err = mmc_send_cmd(mmc, &cmd, NULL);
294 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
299 if (mmc->version != SD_VERSION_2)
300 mmc->version = SD_VERSION_1_0;
302 mmc->ocr = cmd.response[0];
304 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
310 int mmc_send_op_cond(struct mmc *mmc)
316 /* Some cards seem to need this */
320 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
321 cmd.resp_type = MMC_RSP_R3;
322 cmd.cmdarg = OCR_HCS | mmc->voltages;
325 err = mmc_send_cmd(mmc, &cmd, NULL);
331 } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
336 mmc->version = MMC_VERSION_UNKNOWN;
337 mmc->ocr = cmd.response[0];
339 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
346 int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
349 struct mmc_data data;
352 /* Get the Card Status Register */
353 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
354 cmd.resp_type = MMC_RSP_R1;
360 data.blocksize = 512;
361 data.flags = MMC_DATA_READ;
363 err = mmc_send_cmd(mmc, &cmd, &data);
369 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
373 cmd.cmdidx = MMC_CMD_SWITCH;
374 cmd.resp_type = MMC_RSP_R1b;
375 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
380 return mmc_send_cmd(mmc, &cmd, NULL);
383 int mmc_change_freq(struct mmc *mmc)
391 /* Only version 4 supports high-speed */
392 if (mmc->version < MMC_VERSION_4)
395 mmc->card_caps |= MMC_MODE_4BIT;
397 err = mmc_send_ext_csd(mmc, ext_csd);
402 if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215])
403 mmc->high_capacity = 1;
405 cardtype = ext_csd[196] & 0xf;
407 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
412 /* Now check to see that it worked */
413 err = mmc_send_ext_csd(mmc, ext_csd);
418 /* No high-speed support */
422 /* High Speed is set, there are two types: 52MHz and 26MHz */
423 if (cardtype & MMC_HS_52MHZ)
424 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
426 mmc->card_caps |= MMC_MODE_HS;
431 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
434 struct mmc_data data;
436 /* Switch the frequency */
437 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
438 cmd.resp_type = MMC_RSP_R1;
439 cmd.cmdarg = (mode << 31) | 0xffffff;
440 cmd.cmdarg &= ~(0xf << (group * 4));
441 cmd.cmdarg |= value << (group * 4);
444 data.dest = (char *)resp;
447 data.flags = MMC_DATA_READ;
449 return mmc_send_cmd(mmc, &cmd, &data);
453 int sd_change_freq(struct mmc *mmc)
458 uint switch_status[16];
459 struct mmc_data data;
464 /* Read the SCR to find out if this card supports higher speeds */
465 cmd.cmdidx = MMC_CMD_APP_CMD;
466 cmd.resp_type = MMC_RSP_R1;
467 cmd.cmdarg = mmc->rca << 16;
470 err = mmc_send_cmd(mmc, &cmd, NULL);
475 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
476 cmd.resp_type = MMC_RSP_R1;
483 data.dest = (char *)&scr;
486 data.flags = MMC_DATA_READ;
488 err = mmc_send_cmd(mmc, &cmd, &data);
497 mmc->scr[0] = __be32_to_cpu(scr[0]);
498 mmc->scr[1] = __be32_to_cpu(scr[1]);
500 switch ((mmc->scr[0] >> 24) & 0xf) {
502 mmc->version = SD_VERSION_1_0;
505 mmc->version = SD_VERSION_1_10;
508 mmc->version = SD_VERSION_2;
511 mmc->version = SD_VERSION_1_0;
515 /* Version 1.0 doesn't support switching */
516 if (mmc->version == SD_VERSION_1_0)
521 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
522 (u8 *)&switch_status);
527 /* The high-speed function is busy. Try again */
528 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
532 if (mmc->scr[0] & SD_DATA_4BIT)
533 mmc->card_caps |= MMC_MODE_4BIT;
535 /* If high-speed isn't supported, we return */
536 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
539 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status);
544 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
545 mmc->card_caps |= MMC_MODE_HS;
550 /* frequency bases */
551 /* divided by 10 to be nice to platforms without floating point */
559 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
560 * to platforms without floating point.
562 int multipliers[] = {
581 void mmc_set_ios(struct mmc *mmc)
586 void mmc_set_clock(struct mmc *mmc, uint clock)
588 if (clock > mmc->f_max)
591 if (clock < mmc->f_min)
599 void mmc_set_bus_width(struct mmc *mmc, uint width)
601 mmc->bus_width = width;
606 int mmc_startup(struct mmc *mmc)
614 /* Put the Card in Identify Mode */
615 cmd.cmdidx = MMC_CMD_ALL_SEND_CID;
616 cmd.resp_type = MMC_RSP_R2;
620 err = mmc_send_cmd(mmc, &cmd, NULL);
625 memcpy(mmc->cid, cmd.response, 16);
628 * For MMC cards, set the Relative Address.
629 * For SD cards, get the Relatvie Address.
630 * This also puts the cards into Standby State
632 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
633 cmd.cmdarg = mmc->rca << 16;
634 cmd.resp_type = MMC_RSP_R6;
637 err = mmc_send_cmd(mmc, &cmd, NULL);
643 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
645 /* Get the Card-Specific Data */
646 cmd.cmdidx = MMC_CMD_SEND_CSD;
647 cmd.resp_type = MMC_RSP_R2;
648 cmd.cmdarg = mmc->rca << 16;
651 err = mmc_send_cmd(mmc, &cmd, NULL);
656 mmc->csd[0] = cmd.response[0];
657 mmc->csd[1] = cmd.response[1];
658 mmc->csd[2] = cmd.response[2];
659 mmc->csd[3] = cmd.response[3];
661 if (mmc->version == MMC_VERSION_UNKNOWN) {
662 int version = (cmd.response[0] >> 26) & 0xf;
666 mmc->version = MMC_VERSION_1_2;
669 mmc->version = MMC_VERSION_1_4;
672 mmc->version = MMC_VERSION_2_2;
675 mmc->version = MMC_VERSION_3;
678 mmc->version = MMC_VERSION_4;
681 mmc->version = MMC_VERSION_1_2;
686 /* divide frequency by 10, since the mults are 10x bigger */
687 freq = fbase[(cmd.response[0] & 0x7)];
688 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
690 mmc->tran_speed = freq * mult;
692 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
695 mmc->write_bl_len = mmc->read_bl_len;
697 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
699 if (mmc->high_capacity) {
700 csize = (mmc->csd[1] & 0x3f) << 16
701 | (mmc->csd[2] & 0xffff0000) >> 16;
704 csize = (mmc->csd[1] & 0x3ff) << 2
705 | (mmc->csd[2] & 0xc0000000) >> 30;
706 cmult = (mmc->csd[2] & 0x00038000) >> 15;
709 mmc->capacity = (csize + 1) << (cmult + 2);
710 mmc->capacity *= mmc->read_bl_len;
712 if (mmc->read_bl_len > 512)
713 mmc->read_bl_len = 512;
715 if (mmc->write_bl_len > 512)
716 mmc->write_bl_len = 512;
718 /* Select the card, and put it into Transfer Mode */
719 cmd.cmdidx = MMC_CMD_SELECT_CARD;
720 cmd.resp_type = MMC_RSP_R1b;
721 cmd.cmdarg = mmc->rca << 16;
723 err = mmc_send_cmd(mmc, &cmd, NULL);
728 if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
729 /* check ext_csd version and capacity */
730 err = mmc_send_ext_csd(mmc, ext_csd);
731 if (!err & (ext_csd[192] >= 2)) {
732 mmc->capacity = ext_csd[212] << 0 | ext_csd[213] << 8 |
733 ext_csd[214] << 16 | ext_csd[215] << 24;
734 mmc->capacity *= 512;
739 err = sd_change_freq(mmc);
741 err = mmc_change_freq(mmc);
746 /* Restrict card's capabilities by what the host can do */
747 mmc->card_caps &= mmc->host_caps;
750 if (mmc->card_caps & MMC_MODE_4BIT) {
751 cmd.cmdidx = MMC_CMD_APP_CMD;
752 cmd.resp_type = MMC_RSP_R1;
753 cmd.cmdarg = mmc->rca << 16;
756 err = mmc_send_cmd(mmc, &cmd, NULL);
760 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
761 cmd.resp_type = MMC_RSP_R1;
764 err = mmc_send_cmd(mmc, &cmd, NULL);
768 mmc_set_bus_width(mmc, 4);
771 if (mmc->card_caps & MMC_MODE_HS)
772 mmc_set_clock(mmc, 50000000);
774 mmc_set_clock(mmc, 25000000);
776 if (mmc->card_caps & MMC_MODE_4BIT) {
777 /* Set the card to use 4 bit*/
778 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
780 EXT_CSD_BUS_WIDTH_4);
785 mmc_set_bus_width(mmc, 4);
786 } else if (mmc->card_caps & MMC_MODE_8BIT) {
787 /* Set the card to use 8 bit*/
788 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
790 EXT_CSD_BUS_WIDTH_8);
795 mmc_set_bus_width(mmc, 8);
798 if (mmc->card_caps & MMC_MODE_HS) {
799 if (mmc->card_caps & MMC_MODE_HS_52MHz)
800 mmc_set_clock(mmc, 52000000);
802 mmc_set_clock(mmc, 26000000);
804 mmc_set_clock(mmc, 20000000);
807 /* fill in device description */
808 mmc->block_dev.lun = 0;
809 mmc->block_dev.type = 0;
810 mmc->block_dev.blksz = mmc->read_bl_len;
811 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
812 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
813 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
814 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
815 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
816 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
817 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
818 (mmc->cid[2] >> 24) & 0xf);
819 init_part(&mmc->block_dev);
824 int mmc_send_if_cond(struct mmc *mmc)
829 cmd.cmdidx = SD_CMD_SEND_IF_COND;
830 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
831 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
832 cmd.resp_type = MMC_RSP_R7;
835 err = mmc_send_cmd(mmc, &cmd, NULL);
840 if ((cmd.response[0] & 0xff) != 0xaa)
843 mmc->version = SD_VERSION_2;
848 int mmc_register(struct mmc *mmc)
850 /* Setup the universal parts of the block interface just once */
851 mmc->block_dev.if_type = IF_TYPE_MMC;
852 mmc->block_dev.dev = cur_dev_num++;
853 mmc->block_dev.removable = 1;
854 mmc->block_dev.block_read = mmc_bread;
855 mmc->block_dev.block_write = mmc_bwrite;
857 INIT_LIST_HEAD (&mmc->link);
859 list_add_tail (&mmc->link, &mmc_devices);
864 block_dev_desc_t *mmc_get_dev(int dev)
866 struct mmc *mmc = find_mmc_device(dev);
868 return mmc ? &mmc->block_dev : NULL;
871 int mmc_init(struct mmc *mmc)
875 err = mmc->init(mmc);
880 mmc_set_bus_width(mmc, 1);
881 mmc_set_clock(mmc, 1);
884 err = mmc_go_idle(mmc);
889 /* Test for SD version 2 */
890 err = mmc_send_if_cond(mmc);
892 /* Now try to get the SD card's operating condition */
893 err = sd_send_op_cond(mmc);
895 /* If the command timed out, we check for an MMC card */
896 if (err == TIMEOUT) {
897 err = mmc_send_op_cond(mmc);
900 printf("Card did not respond to voltage select!\n");
905 return mmc_startup(mmc);
909 * CPU and board-specific MMC initializations. Aliased function
910 * signals caller to move on
912 static int __def_mmc_init(bd_t *bis)
917 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
918 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
920 void print_mmc_devices(char separator)
923 struct list_head *entry;
925 list_for_each(entry, &mmc_devices) {
926 m = list_entry(entry, struct mmc, link);
928 printf("%s: %d", m->name, m->block_dev.dev);
930 if (entry->next != &mmc_devices)
931 printf("%c ", separator);
937 int mmc_initialize(bd_t *bis)
939 INIT_LIST_HEAD (&mmc_devices);
942 if (board_mmc_init(bis) < 0)
945 print_mmc_devices(',');