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 /* Set block count limit because of 16 bit register limit on some hardware*/
37 #ifndef CONFIG_SYS_MMC_MAX_BLK_COUNT
38 #define CONFIG_SYS_MMC_MAX_BLK_COUNT 65535
41 static struct list_head mmc_devices;
42 static int cur_dev_num = -1;
44 int __board_mmc_getcd(u8 *cd, struct mmc *mmc) {
48 int board_mmc_getcd(u8 *cd, struct mmc *mmc)__attribute__((weak,
49 alias("__board_mmc_getcd")));
51 int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
53 return mmc->send_cmd(mmc, cmd, data);
56 int mmc_set_blocklen(struct mmc *mmc, int len)
60 cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
61 cmd.resp_type = MMC_RSP_R1;
65 return mmc_send_cmd(mmc, &cmd, NULL);
68 struct mmc *find_mmc_device(int dev_num)
71 struct list_head *entry;
73 list_for_each(entry, &mmc_devices) {
74 m = list_entry(entry, struct mmc, link);
76 if (m->block_dev.dev == dev_num)
80 printf("MMC Device %d not found\n", dev_num);
86 mmc_write_blocks(struct mmc *mmc, ulong start, lbaint_t blkcnt, const void*src)
91 if ((start + blkcnt) > mmc->block_dev.lba) {
92 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
93 start + blkcnt, mmc->block_dev.lba);
98 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
100 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
102 if (mmc->high_capacity)
105 cmd.cmdarg = start * mmc->write_bl_len;
107 cmd.resp_type = MMC_RSP_R1;
111 data.blocks = blkcnt;
112 data.blocksize = mmc->write_bl_len;
113 data.flags = MMC_DATA_WRITE;
115 if (mmc_send_cmd(mmc, &cmd, &data)) {
116 printf("mmc write failed\n");
120 /* SPI multiblock writes terminate using a special
121 * token, not a STOP_TRANSMISSION request.
123 if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
124 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
126 cmd.resp_type = MMC_RSP_R1b;
128 if (mmc_send_cmd(mmc, &cmd, NULL)) {
129 printf("mmc fail to send stop cmd\n");
138 mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
140 lbaint_t cur, blocks_todo = blkcnt;
142 struct mmc *mmc = find_mmc_device(dev_num);
146 if (mmc_set_blocklen(mmc, mmc->write_bl_len))
150 cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ?
151 CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo;
152 if(mmc_write_blocks(mmc, start, cur, src) != cur)
156 src += cur * mmc->write_bl_len;
157 } while (blocks_todo > 0);
162 int mmc_read_blocks(struct mmc *mmc, void *dst, ulong start, lbaint_t blkcnt)
165 struct mmc_data data;
168 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
170 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
172 if (mmc->high_capacity)
175 cmd.cmdarg = start * mmc->read_bl_len;
177 cmd.resp_type = MMC_RSP_R1;
181 data.blocks = blkcnt;
182 data.blocksize = mmc->read_bl_len;
183 data.flags = MMC_DATA_READ;
185 if (mmc_send_cmd(mmc, &cmd, &data))
189 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
191 cmd.resp_type = MMC_RSP_R1b;
193 if (mmc_send_cmd(mmc, &cmd, NULL)) {
194 printf("mmc fail to send stop cmd\n");
202 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
204 lbaint_t cur, blocks_todo = blkcnt;
209 struct mmc *mmc = find_mmc_device(dev_num);
213 if ((start + blkcnt) > mmc->block_dev.lba) {
214 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
215 start + blkcnt, mmc->block_dev.lba);
219 if (mmc_set_blocklen(mmc, mmc->read_bl_len))
223 cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ?
224 CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo;
225 if(mmc_read_blocks(mmc, dst, start, cur) != cur)
229 dst += cur * mmc->read_bl_len;
230 } while (blocks_todo > 0);
235 int mmc_go_idle(struct mmc* mmc)
242 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
244 cmd.resp_type = MMC_RSP_NONE;
247 err = mmc_send_cmd(mmc, &cmd, NULL);
258 sd_send_op_cond(struct mmc *mmc)
265 cmd.cmdidx = MMC_CMD_APP_CMD;
266 cmd.resp_type = MMC_RSP_R1;
270 err = mmc_send_cmd(mmc, &cmd, NULL);
275 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
276 cmd.resp_type = MMC_RSP_R3;
279 * Most cards do not answer if some reserved bits
280 * in the ocr are set. However, Some controller
281 * can set bit 7 (reserved for low voltages), but
282 * how to manage low voltages SD card is not yet
285 cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
286 (mmc->voltages & 0xff8000);
288 if (mmc->version == SD_VERSION_2)
289 cmd.cmdarg |= OCR_HCS;
291 err = mmc_send_cmd(mmc, &cmd, NULL);
297 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
302 if (mmc->version != SD_VERSION_2)
303 mmc->version = SD_VERSION_1_0;
305 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
306 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
307 cmd.resp_type = MMC_RSP_R3;
311 err = mmc_send_cmd(mmc, &cmd, NULL);
317 mmc->ocr = cmd.response[0];
319 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
325 int mmc_send_op_cond(struct mmc *mmc)
331 /* Some cards seem to need this */
335 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
336 cmd.resp_type = MMC_RSP_R3;
337 cmd.cmdarg = OCR_HCS | (mmc_host_is_spi(mmc) ? 0 :
341 err = mmc_send_cmd(mmc, &cmd, NULL);
347 } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
352 if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
353 cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
354 cmd.resp_type = MMC_RSP_R3;
358 err = mmc_send_cmd(mmc, &cmd, NULL);
364 mmc->version = MMC_VERSION_UNKNOWN;
365 mmc->ocr = cmd.response[0];
367 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
374 int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
377 struct mmc_data data;
380 /* Get the Card Status Register */
381 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
382 cmd.resp_type = MMC_RSP_R1;
388 data.blocksize = 512;
389 data.flags = MMC_DATA_READ;
391 err = mmc_send_cmd(mmc, &cmd, &data);
397 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
401 cmd.cmdidx = MMC_CMD_SWITCH;
402 cmd.resp_type = MMC_RSP_R1b;
403 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
408 return mmc_send_cmd(mmc, &cmd, NULL);
411 int mmc_change_freq(struct mmc *mmc)
419 if (mmc_host_is_spi(mmc))
422 /* Only version 4 supports high-speed */
423 if (mmc->version < MMC_VERSION_4)
426 mmc->card_caps |= MMC_MODE_4BIT;
428 err = mmc_send_ext_csd(mmc, ext_csd);
433 if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215])
434 mmc->high_capacity = 1;
436 cardtype = ext_csd[196] & 0xf;
438 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
443 /* Now check to see that it worked */
444 err = mmc_send_ext_csd(mmc, ext_csd);
449 /* No high-speed support */
453 /* High Speed is set, there are two types: 52MHz and 26MHz */
454 if (cardtype & MMC_HS_52MHZ)
455 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
457 mmc->card_caps |= MMC_MODE_HS;
462 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
465 struct mmc_data data;
467 /* Switch the frequency */
468 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
469 cmd.resp_type = MMC_RSP_R1;
470 cmd.cmdarg = (mode << 31) | 0xffffff;
471 cmd.cmdarg &= ~(0xf << (group * 4));
472 cmd.cmdarg |= value << (group * 4);
475 data.dest = (char *)resp;
478 data.flags = MMC_DATA_READ;
480 return mmc_send_cmd(mmc, &cmd, &data);
484 int sd_change_freq(struct mmc *mmc)
489 uint switch_status[16];
490 struct mmc_data data;
495 if (mmc_host_is_spi(mmc))
498 /* Read the SCR to find out if this card supports higher speeds */
499 cmd.cmdidx = MMC_CMD_APP_CMD;
500 cmd.resp_type = MMC_RSP_R1;
501 cmd.cmdarg = mmc->rca << 16;
504 err = mmc_send_cmd(mmc, &cmd, NULL);
509 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
510 cmd.resp_type = MMC_RSP_R1;
517 data.dest = (char *)&scr;
520 data.flags = MMC_DATA_READ;
522 err = mmc_send_cmd(mmc, &cmd, &data);
531 mmc->scr[0] = __be32_to_cpu(scr[0]);
532 mmc->scr[1] = __be32_to_cpu(scr[1]);
534 switch ((mmc->scr[0] >> 24) & 0xf) {
536 mmc->version = SD_VERSION_1_0;
539 mmc->version = SD_VERSION_1_10;
542 mmc->version = SD_VERSION_2;
545 mmc->version = SD_VERSION_1_0;
549 if (mmc->scr[0] & SD_DATA_4BIT)
550 mmc->card_caps |= MMC_MODE_4BIT;
552 /* Version 1.0 doesn't support switching */
553 if (mmc->version == SD_VERSION_1_0)
558 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
559 (u8 *)&switch_status);
564 /* The high-speed function is busy. Try again */
565 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
569 /* If high-speed isn't supported, we return */
570 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
573 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status);
578 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
579 mmc->card_caps |= MMC_MODE_HS;
584 /* frequency bases */
585 /* divided by 10 to be nice to platforms without floating point */
586 static const int fbase[] = {
593 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
594 * to platforms without floating point.
596 static const int multipliers[] = {
615 void mmc_set_ios(struct mmc *mmc)
620 void mmc_set_clock(struct mmc *mmc, uint clock)
622 if (clock > mmc->f_max)
625 if (clock < mmc->f_min)
633 void mmc_set_bus_width(struct mmc *mmc, uint width)
635 mmc->bus_width = width;
640 int mmc_startup(struct mmc *mmc)
648 #ifdef CONFIG_MMC_SPI_CRC_ON
649 if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
650 cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
651 cmd.resp_type = MMC_RSP_R1;
654 err = mmc_send_cmd(mmc, &cmd, NULL);
661 /* Put the Card in Identify Mode */
662 cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
663 MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
664 cmd.resp_type = MMC_RSP_R2;
668 err = mmc_send_cmd(mmc, &cmd, NULL);
673 memcpy(mmc->cid, cmd.response, 16);
676 * For MMC cards, set the Relative Address.
677 * For SD cards, get the Relatvie Address.
678 * This also puts the cards into Standby State
680 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
681 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
682 cmd.cmdarg = mmc->rca << 16;
683 cmd.resp_type = MMC_RSP_R6;
686 err = mmc_send_cmd(mmc, &cmd, NULL);
692 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
695 /* Get the Card-Specific Data */
696 cmd.cmdidx = MMC_CMD_SEND_CSD;
697 cmd.resp_type = MMC_RSP_R2;
698 cmd.cmdarg = mmc->rca << 16;
701 err = mmc_send_cmd(mmc, &cmd, NULL);
706 mmc->csd[0] = cmd.response[0];
707 mmc->csd[1] = cmd.response[1];
708 mmc->csd[2] = cmd.response[2];
709 mmc->csd[3] = cmd.response[3];
711 if (mmc->version == MMC_VERSION_UNKNOWN) {
712 int version = (cmd.response[0] >> 26) & 0xf;
716 mmc->version = MMC_VERSION_1_2;
719 mmc->version = MMC_VERSION_1_4;
722 mmc->version = MMC_VERSION_2_2;
725 mmc->version = MMC_VERSION_3;
728 mmc->version = MMC_VERSION_4;
731 mmc->version = MMC_VERSION_1_2;
736 /* divide frequency by 10, since the mults are 10x bigger */
737 freq = fbase[(cmd.response[0] & 0x7)];
738 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
740 mmc->tran_speed = freq * mult;
742 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
745 mmc->write_bl_len = mmc->read_bl_len;
747 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
749 if (mmc->high_capacity) {
750 csize = (mmc->csd[1] & 0x3f) << 16
751 | (mmc->csd[2] & 0xffff0000) >> 16;
754 csize = (mmc->csd[1] & 0x3ff) << 2
755 | (mmc->csd[2] & 0xc0000000) >> 30;
756 cmult = (mmc->csd[2] & 0x00038000) >> 15;
759 mmc->capacity = (csize + 1) << (cmult + 2);
760 mmc->capacity *= mmc->read_bl_len;
762 if (mmc->read_bl_len > 512)
763 mmc->read_bl_len = 512;
765 if (mmc->write_bl_len > 512)
766 mmc->write_bl_len = 512;
768 /* Select the card, and put it into Transfer Mode */
769 if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
770 cmd.cmdidx = MMC_CMD_SELECT_CARD;
771 cmd.resp_type = MMC_RSP_R1b;
772 cmd.cmdarg = mmc->rca << 16;
774 err = mmc_send_cmd(mmc, &cmd, NULL);
780 if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
781 /* check ext_csd version and capacity */
782 err = mmc_send_ext_csd(mmc, ext_csd);
783 if (!err & (ext_csd[192] >= 2)) {
784 mmc->capacity = ext_csd[212] << 0 | ext_csd[213] << 8 |
785 ext_csd[214] << 16 | ext_csd[215] << 24;
786 mmc->capacity *= 512;
791 err = sd_change_freq(mmc);
793 err = mmc_change_freq(mmc);
798 /* Restrict card's capabilities by what the host can do */
799 mmc->card_caps &= mmc->host_caps;
802 if (mmc->card_caps & MMC_MODE_4BIT) {
803 cmd.cmdidx = MMC_CMD_APP_CMD;
804 cmd.resp_type = MMC_RSP_R1;
805 cmd.cmdarg = mmc->rca << 16;
808 err = mmc_send_cmd(mmc, &cmd, NULL);
812 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
813 cmd.resp_type = MMC_RSP_R1;
816 err = mmc_send_cmd(mmc, &cmd, NULL);
820 mmc_set_bus_width(mmc, 4);
823 if (mmc->card_caps & MMC_MODE_HS)
824 mmc_set_clock(mmc, 50000000);
826 mmc_set_clock(mmc, 25000000);
828 if (mmc->card_caps & MMC_MODE_4BIT) {
829 /* Set the card to use 4 bit*/
830 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
832 EXT_CSD_BUS_WIDTH_4);
837 mmc_set_bus_width(mmc, 4);
838 } else if (mmc->card_caps & MMC_MODE_8BIT) {
839 /* Set the card to use 8 bit*/
840 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
842 EXT_CSD_BUS_WIDTH_8);
847 mmc_set_bus_width(mmc, 8);
850 if (mmc->card_caps & MMC_MODE_HS) {
851 if (mmc->card_caps & MMC_MODE_HS_52MHz)
852 mmc_set_clock(mmc, 52000000);
854 mmc_set_clock(mmc, 26000000);
856 mmc_set_clock(mmc, 20000000);
859 /* fill in device description */
860 mmc->block_dev.lun = 0;
861 mmc->block_dev.type = 0;
862 mmc->block_dev.blksz = mmc->read_bl_len;
863 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
864 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
865 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
866 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
867 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
868 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
869 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
870 (mmc->cid[2] >> 24) & 0xf);
871 init_part(&mmc->block_dev);
876 int mmc_send_if_cond(struct mmc *mmc)
881 cmd.cmdidx = SD_CMD_SEND_IF_COND;
882 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
883 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
884 cmd.resp_type = MMC_RSP_R7;
887 err = mmc_send_cmd(mmc, &cmd, NULL);
892 if ((cmd.response[0] & 0xff) != 0xaa)
895 mmc->version = SD_VERSION_2;
900 int mmc_register(struct mmc *mmc)
902 /* Setup the universal parts of the block interface just once */
903 mmc->block_dev.if_type = IF_TYPE_MMC;
904 mmc->block_dev.dev = cur_dev_num++;
905 mmc->block_dev.removable = 1;
906 mmc->block_dev.block_read = mmc_bread;
907 mmc->block_dev.block_write = mmc_bwrite;
909 INIT_LIST_HEAD (&mmc->link);
911 list_add_tail (&mmc->link, &mmc_devices);
916 block_dev_desc_t *mmc_get_dev(int dev)
918 struct mmc *mmc = find_mmc_device(dev);
920 return mmc ? &mmc->block_dev : NULL;
923 int mmc_init(struct mmc *mmc)
927 err = mmc->init(mmc);
932 mmc_set_bus_width(mmc, 1);
933 mmc_set_clock(mmc, 1);
936 err = mmc_go_idle(mmc);
941 /* Test for SD version 2 */
942 err = mmc_send_if_cond(mmc);
944 /* Now try to get the SD card's operating condition */
945 err = sd_send_op_cond(mmc);
947 /* If the command timed out, we check for an MMC card */
948 if (err == TIMEOUT) {
949 err = mmc_send_op_cond(mmc);
952 printf("Card did not respond to voltage select!\n");
957 return mmc_startup(mmc);
961 * CPU and board-specific MMC initializations. Aliased function
962 * signals caller to move on
964 static int __def_mmc_init(bd_t *bis)
969 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
970 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
972 void print_mmc_devices(char separator)
975 struct list_head *entry;
977 list_for_each(entry, &mmc_devices) {
978 m = list_entry(entry, struct mmc, link);
980 printf("%s: %d", m->name, m->block_dev.dev);
982 if (entry->next != &mmc_devices)
983 printf("%c ", separator);
989 int mmc_initialize(bd_t *bis)
991 INIT_LIST_HEAD (&mmc_devices);
994 if (board_mmc_init(bis) < 0)
997 print_mmc_devices(',');