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 return mmc->send_cmd(mmc, cmd, data);
55 int mmc_set_blocklen(struct mmc *mmc, int len)
59 cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
60 cmd.resp_type = MMC_RSP_R1;
64 return mmc_send_cmd(mmc, &cmd, NULL);
67 struct mmc *find_mmc_device(int dev_num)
70 struct list_head *entry;
72 list_for_each(entry, &mmc_devices) {
73 m = list_entry(entry, struct mmc, link);
75 if (m->block_dev.dev == dev_num)
79 printf("MMC Device %d not found\n", dev_num);
85 mmc_write_blocks(struct mmc *mmc, ulong start, lbaint_t blkcnt, const void*src)
90 if ((start + blkcnt) > mmc->block_dev.lba) {
91 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
92 start + blkcnt, mmc->block_dev.lba);
97 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
99 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
101 if (mmc->high_capacity)
104 cmd.cmdarg = start * mmc->write_bl_len;
106 cmd.resp_type = MMC_RSP_R1;
110 data.blocks = blkcnt;
111 data.blocksize = mmc->write_bl_len;
112 data.flags = MMC_DATA_WRITE;
114 if (mmc_send_cmd(mmc, &cmd, &data)) {
115 printf("mmc write failed\n");
119 /* SPI multiblock writes terminate using a special
120 * token, not a STOP_TRANSMISSION request.
122 if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
123 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
125 cmd.resp_type = MMC_RSP_R1b;
127 if (mmc_send_cmd(mmc, &cmd, NULL)) {
128 printf("mmc fail to send stop cmd\n");
137 mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
139 lbaint_t cur, blocks_todo = blkcnt;
141 struct mmc *mmc = find_mmc_device(dev_num);
145 if (mmc_set_blocklen(mmc, mmc->write_bl_len))
149 cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ?
150 CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo;
151 if(mmc_write_blocks(mmc, start, cur, src) != cur)
155 src += cur * mmc->write_bl_len;
156 } while (blocks_todo > 0);
161 int mmc_read_blocks(struct mmc *mmc, void *dst, ulong start, lbaint_t blkcnt)
164 struct mmc_data data;
167 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
169 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
171 if (mmc->high_capacity)
174 cmd.cmdarg = start * mmc->read_bl_len;
176 cmd.resp_type = MMC_RSP_R1;
180 data.blocks = blkcnt;
181 data.blocksize = mmc->read_bl_len;
182 data.flags = MMC_DATA_READ;
184 if (mmc_send_cmd(mmc, &cmd, &data))
188 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
190 cmd.resp_type = MMC_RSP_R1b;
192 if (mmc_send_cmd(mmc, &cmd, NULL)) {
193 printf("mmc fail to send stop cmd\n");
201 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
203 lbaint_t cur, blocks_todo = blkcnt;
208 struct mmc *mmc = find_mmc_device(dev_num);
212 if ((start + blkcnt) > mmc->block_dev.lba) {
213 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
214 start + blkcnt, mmc->block_dev.lba);
218 if (mmc_set_blocklen(mmc, mmc->read_bl_len))
222 cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ?
223 CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo;
224 if(mmc_read_blocks(mmc, dst, start, cur) != cur)
228 dst += cur * mmc->read_bl_len;
229 } while (blocks_todo > 0);
234 int mmc_go_idle(struct mmc* mmc)
241 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
243 cmd.resp_type = MMC_RSP_NONE;
246 err = mmc_send_cmd(mmc, &cmd, NULL);
257 sd_send_op_cond(struct mmc *mmc)
264 cmd.cmdidx = MMC_CMD_APP_CMD;
265 cmd.resp_type = MMC_RSP_R1;
269 err = mmc_send_cmd(mmc, &cmd, NULL);
274 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
275 cmd.resp_type = MMC_RSP_R3;
278 * Most cards do not answer if some reserved bits
279 * in the ocr are set. However, Some controller
280 * can set bit 7 (reserved for low voltages), but
281 * how to manage low voltages SD card is not yet
284 cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
285 (mmc->voltages & 0xff8000);
287 if (mmc->version == SD_VERSION_2)
288 cmd.cmdarg |= OCR_HCS;
290 err = mmc_send_cmd(mmc, &cmd, NULL);
296 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
301 if (mmc->version != SD_VERSION_2)
302 mmc->version = SD_VERSION_1_0;
304 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
305 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
306 cmd.resp_type = MMC_RSP_R3;
310 err = mmc_send_cmd(mmc, &cmd, NULL);
316 mmc->ocr = cmd.response[0];
318 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
324 int mmc_send_op_cond(struct mmc *mmc)
330 /* Some cards seem to need this */
334 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
335 cmd.resp_type = MMC_RSP_R3;
336 cmd.cmdarg = OCR_HCS | (mmc_host_is_spi(mmc) ? 0 :
340 err = mmc_send_cmd(mmc, &cmd, NULL);
346 } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
351 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
352 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
353 cmd.resp_type = MMC_RSP_R3;
357 err = mmc_send_cmd(mmc, &cmd, NULL);
363 mmc->version = MMC_VERSION_UNKNOWN;
364 mmc->ocr = cmd.response[0];
366 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
373 int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
376 struct mmc_data data;
379 /* Get the Card Status Register */
380 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
381 cmd.resp_type = MMC_RSP_R1;
387 data.blocksize = 512;
388 data.flags = MMC_DATA_READ;
390 err = mmc_send_cmd(mmc, &cmd, &data);
396 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
400 cmd.cmdidx = MMC_CMD_SWITCH;
401 cmd.resp_type = MMC_RSP_R1b;
402 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
407 return mmc_send_cmd(mmc, &cmd, NULL);
410 int mmc_change_freq(struct mmc *mmc)
418 if (mmc_host_is_spi(mmc))
421 /* Only version 4 supports high-speed */
422 if (mmc->version < MMC_VERSION_4)
425 mmc->card_caps |= MMC_MODE_4BIT;
427 err = mmc_send_ext_csd(mmc, ext_csd);
432 if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215])
433 mmc->high_capacity = 1;
435 cardtype = ext_csd[196] & 0xf;
437 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
442 /* Now check to see that it worked */
443 err = mmc_send_ext_csd(mmc, ext_csd);
448 /* No high-speed support */
452 /* High Speed is set, there are two types: 52MHz and 26MHz */
453 if (cardtype & MMC_HS_52MHZ)
454 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
456 mmc->card_caps |= MMC_MODE_HS;
461 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
464 struct mmc_data data;
466 /* Switch the frequency */
467 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
468 cmd.resp_type = MMC_RSP_R1;
469 cmd.cmdarg = (mode << 31) | 0xffffff;
470 cmd.cmdarg &= ~(0xf << (group * 4));
471 cmd.cmdarg |= value << (group * 4);
474 data.dest = (char *)resp;
477 data.flags = MMC_DATA_READ;
479 return mmc_send_cmd(mmc, &cmd, &data);
483 int sd_change_freq(struct mmc *mmc)
488 uint switch_status[16];
489 struct mmc_data data;
494 if (mmc_host_is_spi(mmc))
497 /* Read the SCR to find out if this card supports higher speeds */
498 cmd.cmdidx = MMC_CMD_APP_CMD;
499 cmd.resp_type = MMC_RSP_R1;
500 cmd.cmdarg = mmc->rca << 16;
503 err = mmc_send_cmd(mmc, &cmd, NULL);
508 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
509 cmd.resp_type = MMC_RSP_R1;
516 data.dest = (char *)&scr;
519 data.flags = MMC_DATA_READ;
521 err = mmc_send_cmd(mmc, &cmd, &data);
530 mmc->scr[0] = __be32_to_cpu(scr[0]);
531 mmc->scr[1] = __be32_to_cpu(scr[1]);
533 switch ((mmc->scr[0] >> 24) & 0xf) {
535 mmc->version = SD_VERSION_1_0;
538 mmc->version = SD_VERSION_1_10;
541 mmc->version = SD_VERSION_2;
544 mmc->version = SD_VERSION_1_0;
548 if (mmc->scr[0] & SD_DATA_4BIT)
549 mmc->card_caps |= MMC_MODE_4BIT;
551 /* Version 1.0 doesn't support switching */
552 if (mmc->version == SD_VERSION_1_0)
557 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
558 (u8 *)&switch_status);
563 /* The high-speed function is busy. Try again */
564 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
568 /* If high-speed isn't supported, we return */
569 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
572 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status);
577 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
578 mmc->card_caps |= MMC_MODE_HS;
583 /* frequency bases */
584 /* divided by 10 to be nice to platforms without floating point */
585 static const int fbase[] = {
592 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
593 * to platforms without floating point.
595 static const int multipliers[] = {
614 void mmc_set_ios(struct mmc *mmc)
619 void mmc_set_clock(struct mmc *mmc, uint clock)
621 if (clock > mmc->f_max)
624 if (clock < mmc->f_min)
632 void mmc_set_bus_width(struct mmc *mmc, uint width)
634 mmc->bus_width = width;
639 int mmc_startup(struct mmc *mmc)
647 #ifdef CONFIG_MMC_SPI_CRC_ON
648 if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
649 cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
650 cmd.resp_type = MMC_RSP_R1;
653 err = mmc_send_cmd(mmc, &cmd, NULL);
660 /* Put the Card in Identify Mode */
661 cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
662 MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
663 cmd.resp_type = MMC_RSP_R2;
667 err = mmc_send_cmd(mmc, &cmd, NULL);
672 memcpy(mmc->cid, cmd.response, 16);
675 * For MMC cards, set the Relative Address.
676 * For SD cards, get the Relatvie Address.
677 * This also puts the cards into Standby State
679 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
680 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
681 cmd.cmdarg = mmc->rca << 16;
682 cmd.resp_type = MMC_RSP_R6;
685 err = mmc_send_cmd(mmc, &cmd, NULL);
691 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
694 /* Get the Card-Specific Data */
695 cmd.cmdidx = MMC_CMD_SEND_CSD;
696 cmd.resp_type = MMC_RSP_R2;
697 cmd.cmdarg = mmc->rca << 16;
700 err = mmc_send_cmd(mmc, &cmd, NULL);
705 mmc->csd[0] = cmd.response[0];
706 mmc->csd[1] = cmd.response[1];
707 mmc->csd[2] = cmd.response[2];
708 mmc->csd[3] = cmd.response[3];
710 if (mmc->version == MMC_VERSION_UNKNOWN) {
711 int version = (cmd.response[0] >> 26) & 0xf;
715 mmc->version = MMC_VERSION_1_2;
718 mmc->version = MMC_VERSION_1_4;
721 mmc->version = MMC_VERSION_2_2;
724 mmc->version = MMC_VERSION_3;
727 mmc->version = MMC_VERSION_4;
730 mmc->version = MMC_VERSION_1_2;
735 /* divide frequency by 10, since the mults are 10x bigger */
736 freq = fbase[(cmd.response[0] & 0x7)];
737 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
739 mmc->tran_speed = freq * mult;
741 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
744 mmc->write_bl_len = mmc->read_bl_len;
746 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
748 if (mmc->high_capacity) {
749 csize = (mmc->csd[1] & 0x3f) << 16
750 | (mmc->csd[2] & 0xffff0000) >> 16;
753 csize = (mmc->csd[1] & 0x3ff) << 2
754 | (mmc->csd[2] & 0xc0000000) >> 30;
755 cmult = (mmc->csd[2] & 0x00038000) >> 15;
758 mmc->capacity = (csize + 1) << (cmult + 2);
759 mmc->capacity *= mmc->read_bl_len;
761 if (mmc->read_bl_len > 512)
762 mmc->read_bl_len = 512;
764 if (mmc->write_bl_len > 512)
765 mmc->write_bl_len = 512;
767 /* Select the card, and put it into Transfer Mode */
768 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
769 cmd.cmdidx = MMC_CMD_SELECT_CARD;
770 cmd.resp_type = MMC_RSP_R1b;
771 cmd.cmdarg = mmc->rca << 16;
773 err = mmc_send_cmd(mmc, &cmd, NULL);
779 if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
780 /* check ext_csd version and capacity */
781 err = mmc_send_ext_csd(mmc, ext_csd);
782 if (!err & (ext_csd[192] >= 2)) {
783 mmc->capacity = ext_csd[212] << 0 | ext_csd[213] << 8 |
784 ext_csd[214] << 16 | ext_csd[215] << 24;
785 mmc->capacity *= 512;
790 err = sd_change_freq(mmc);
792 err = mmc_change_freq(mmc);
797 /* Restrict card's capabilities by what the host can do */
798 mmc->card_caps &= mmc->host_caps;
801 if (mmc->card_caps & MMC_MODE_4BIT) {
802 cmd.cmdidx = MMC_CMD_APP_CMD;
803 cmd.resp_type = MMC_RSP_R1;
804 cmd.cmdarg = mmc->rca << 16;
807 err = mmc_send_cmd(mmc, &cmd, NULL);
811 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
812 cmd.resp_type = MMC_RSP_R1;
815 err = mmc_send_cmd(mmc, &cmd, NULL);
819 mmc_set_bus_width(mmc, 4);
822 if (mmc->card_caps & MMC_MODE_HS)
823 mmc_set_clock(mmc, 50000000);
825 mmc_set_clock(mmc, 25000000);
827 if (mmc->card_caps & MMC_MODE_4BIT) {
828 /* Set the card to use 4 bit*/
829 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
831 EXT_CSD_BUS_WIDTH_4);
836 mmc_set_bus_width(mmc, 4);
837 } else if (mmc->card_caps & MMC_MODE_8BIT) {
838 /* Set the card to use 8 bit*/
839 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
841 EXT_CSD_BUS_WIDTH_8);
846 mmc_set_bus_width(mmc, 8);
849 if (mmc->card_caps & MMC_MODE_HS) {
850 if (mmc->card_caps & MMC_MODE_HS_52MHz)
851 mmc_set_clock(mmc, 52000000);
853 mmc_set_clock(mmc, 26000000);
855 mmc_set_clock(mmc, 20000000);
858 /* fill in device description */
859 mmc->block_dev.lun = 0;
860 mmc->block_dev.type = 0;
861 mmc->block_dev.blksz = mmc->read_bl_len;
862 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
863 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
864 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
865 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
866 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
867 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
868 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
869 (mmc->cid[2] >> 24) & 0xf);
870 init_part(&mmc->block_dev);
875 int mmc_send_if_cond(struct mmc *mmc)
880 cmd.cmdidx = SD_CMD_SEND_IF_COND;
881 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
882 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
883 cmd.resp_type = MMC_RSP_R7;
886 err = mmc_send_cmd(mmc, &cmd, NULL);
891 if ((cmd.response[0] & 0xff) != 0xaa)
894 mmc->version = SD_VERSION_2;
899 int mmc_register(struct mmc *mmc)
901 /* Setup the universal parts of the block interface just once */
902 mmc->block_dev.if_type = IF_TYPE_MMC;
903 mmc->block_dev.dev = cur_dev_num++;
904 mmc->block_dev.removable = 1;
905 mmc->block_dev.block_read = mmc_bread;
906 mmc->block_dev.block_write = mmc_bwrite;
908 INIT_LIST_HEAD (&mmc->link);
910 list_add_tail (&mmc->link, &mmc_devices);
915 block_dev_desc_t *mmc_get_dev(int dev)
917 struct mmc *mmc = find_mmc_device(dev);
919 return mmc ? &mmc->block_dev : NULL;
922 int mmc_init(struct mmc *mmc)
926 err = mmc->init(mmc);
931 mmc_set_bus_width(mmc, 1);
932 mmc_set_clock(mmc, 1);
935 err = mmc_go_idle(mmc);
940 /* Test for SD version 2 */
941 err = mmc_send_if_cond(mmc);
943 /* Now try to get the SD card's operating condition */
944 err = sd_send_op_cond(mmc);
946 /* If the command timed out, we check for an MMC card */
947 if (err == TIMEOUT) {
948 err = mmc_send_op_cond(mmc);
951 printf("Card did not respond to voltage select!\n");
956 return mmc_startup(mmc);
960 * CPU and board-specific MMC initializations. Aliased function
961 * signals caller to move on
963 static int __def_mmc_init(bd_t *bis)
968 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
969 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
971 void print_mmc_devices(char separator)
974 struct list_head *entry;
976 list_for_each(entry, &mmc_devices) {
977 m = list_entry(entry, struct mmc, link);
979 printf("%s: %d", m->name, m->block_dev.dev);
981 if (entry->next != &mmc_devices)
982 printf("%c ", separator);
988 int mmc_initialize(bd_t *bis)
990 INIT_LIST_HEAD (&mmc_devices);
993 if (board_mmc_init(bis) < 0)
996 print_mmc_devices(',');