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");
121 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
123 cmd.resp_type = MMC_RSP_R1b;
125 if (mmc_send_cmd(mmc, &cmd, NULL)) {
126 printf("mmc fail to send stop cmd\n");
135 mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
137 lbaint_t cur, blocks_todo = blkcnt;
139 struct mmc *mmc = find_mmc_device(dev_num);
143 if (mmc_set_blocklen(mmc, mmc->write_bl_len))
147 cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ?
148 CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo;
149 if(mmc_write_blocks(mmc, start, cur, src) != cur)
153 src += cur * mmc->write_bl_len;
154 } while (blocks_todo > 0);
159 int mmc_read_blocks(struct mmc *mmc, void *dst, ulong start, lbaint_t blkcnt)
162 struct mmc_data data;
165 cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
167 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
169 if (mmc->high_capacity)
172 cmd.cmdarg = start * mmc->read_bl_len;
174 cmd.resp_type = MMC_RSP_R1;
178 data.blocks = blkcnt;
179 data.blocksize = mmc->read_bl_len;
180 data.flags = MMC_DATA_READ;
182 if (mmc_send_cmd(mmc, &cmd, &data))
186 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
188 cmd.resp_type = MMC_RSP_R1b;
190 if (mmc_send_cmd(mmc, &cmd, NULL)) {
191 printf("mmc fail to send stop cmd\n");
199 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
201 lbaint_t cur, blocks_todo = blkcnt;
206 struct mmc *mmc = find_mmc_device(dev_num);
210 if ((start + blkcnt) > mmc->block_dev.lba) {
211 printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
212 start + blkcnt, mmc->block_dev.lba);
216 if (mmc_set_blocklen(mmc, mmc->read_bl_len))
220 cur = (blocks_todo > CONFIG_SYS_MMC_MAX_BLK_COUNT) ?
221 CONFIG_SYS_MMC_MAX_BLK_COUNT : blocks_todo;
222 if(mmc_read_blocks(mmc, dst, start, cur) != cur)
226 dst += cur * mmc->read_bl_len;
227 } while (blocks_todo > 0);
232 int mmc_go_idle(struct mmc* mmc)
239 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
241 cmd.resp_type = MMC_RSP_NONE;
244 err = mmc_send_cmd(mmc, &cmd, NULL);
255 sd_send_op_cond(struct mmc *mmc)
262 cmd.cmdidx = MMC_CMD_APP_CMD;
263 cmd.resp_type = MMC_RSP_R1;
267 err = mmc_send_cmd(mmc, &cmd, NULL);
272 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
273 cmd.resp_type = MMC_RSP_R3;
276 * Most cards do not answer if some reserved bits
277 * in the ocr are set. However, Some controller
278 * can set bit 7 (reserved for low voltages), but
279 * how to manage low voltages SD card is not yet
282 cmd.cmdarg = mmc->voltages & 0xff8000;
284 if (mmc->version == SD_VERSION_2)
285 cmd.cmdarg |= OCR_HCS;
287 err = mmc_send_cmd(mmc, &cmd, NULL);
293 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
298 if (mmc->version != SD_VERSION_2)
299 mmc->version = SD_VERSION_1_0;
301 mmc->ocr = cmd.response[0];
303 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
309 int mmc_send_op_cond(struct mmc *mmc)
315 /* Some cards seem to need this */
319 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
320 cmd.resp_type = MMC_RSP_R3;
321 cmd.cmdarg = OCR_HCS | mmc->voltages;
324 err = mmc_send_cmd(mmc, &cmd, NULL);
330 } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
335 mmc->version = MMC_VERSION_UNKNOWN;
336 mmc->ocr = cmd.response[0];
338 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
345 int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
348 struct mmc_data data;
351 /* Get the Card Status Register */
352 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
353 cmd.resp_type = MMC_RSP_R1;
359 data.blocksize = 512;
360 data.flags = MMC_DATA_READ;
362 err = mmc_send_cmd(mmc, &cmd, &data);
368 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
372 cmd.cmdidx = MMC_CMD_SWITCH;
373 cmd.resp_type = MMC_RSP_R1b;
374 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
379 return mmc_send_cmd(mmc, &cmd, NULL);
382 int mmc_change_freq(struct mmc *mmc)
390 /* Only version 4 supports high-speed */
391 if (mmc->version < MMC_VERSION_4)
394 mmc->card_caps |= MMC_MODE_4BIT;
396 err = mmc_send_ext_csd(mmc, ext_csd);
401 if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215])
402 mmc->high_capacity = 1;
404 cardtype = ext_csd[196] & 0xf;
406 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
411 /* Now check to see that it worked */
412 err = mmc_send_ext_csd(mmc, ext_csd);
417 /* No high-speed support */
421 /* High Speed is set, there are two types: 52MHz and 26MHz */
422 if (cardtype & MMC_HS_52MHZ)
423 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
425 mmc->card_caps |= MMC_MODE_HS;
430 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
433 struct mmc_data data;
435 /* Switch the frequency */
436 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
437 cmd.resp_type = MMC_RSP_R1;
438 cmd.cmdarg = (mode << 31) | 0xffffff;
439 cmd.cmdarg &= ~(0xf << (group * 4));
440 cmd.cmdarg |= value << (group * 4);
443 data.dest = (char *)resp;
446 data.flags = MMC_DATA_READ;
448 return mmc_send_cmd(mmc, &cmd, &data);
452 int sd_change_freq(struct mmc *mmc)
457 uint switch_status[16];
458 struct mmc_data data;
463 /* Read the SCR to find out if this card supports higher speeds */
464 cmd.cmdidx = MMC_CMD_APP_CMD;
465 cmd.resp_type = MMC_RSP_R1;
466 cmd.cmdarg = mmc->rca << 16;
469 err = mmc_send_cmd(mmc, &cmd, NULL);
474 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
475 cmd.resp_type = MMC_RSP_R1;
482 data.dest = (char *)&scr;
485 data.flags = MMC_DATA_READ;
487 err = mmc_send_cmd(mmc, &cmd, &data);
496 mmc->scr[0] = __be32_to_cpu(scr[0]);
497 mmc->scr[1] = __be32_to_cpu(scr[1]);
499 switch ((mmc->scr[0] >> 24) & 0xf) {
501 mmc->version = SD_VERSION_1_0;
504 mmc->version = SD_VERSION_1_10;
507 mmc->version = SD_VERSION_2;
510 mmc->version = SD_VERSION_1_0;
514 if (mmc->scr[0] & SD_DATA_4BIT)
515 mmc->card_caps |= MMC_MODE_4BIT;
517 /* Version 1.0 doesn't support switching */
518 if (mmc->version == SD_VERSION_1_0)
523 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
524 (u8 *)&switch_status);
529 /* The high-speed function is busy. Try again */
530 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
534 /* If high-speed isn't supported, we return */
535 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
538 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status);
543 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
544 mmc->card_caps |= MMC_MODE_HS;
549 /* frequency bases */
550 /* divided by 10 to be nice to platforms without floating point */
558 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
559 * to platforms without floating point.
561 int multipliers[] = {
580 void mmc_set_ios(struct mmc *mmc)
585 void mmc_set_clock(struct mmc *mmc, uint clock)
587 if (clock > mmc->f_max)
590 if (clock < mmc->f_min)
598 void mmc_set_bus_width(struct mmc *mmc, uint width)
600 mmc->bus_width = width;
605 int mmc_startup(struct mmc *mmc)
613 /* Put the Card in Identify Mode */
614 cmd.cmdidx = MMC_CMD_ALL_SEND_CID;
615 cmd.resp_type = MMC_RSP_R2;
619 err = mmc_send_cmd(mmc, &cmd, NULL);
624 memcpy(mmc->cid, cmd.response, 16);
627 * For MMC cards, set the Relative Address.
628 * For SD cards, get the Relatvie Address.
629 * This also puts the cards into Standby State
631 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
632 cmd.cmdarg = mmc->rca << 16;
633 cmd.resp_type = MMC_RSP_R6;
636 err = mmc_send_cmd(mmc, &cmd, NULL);
642 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
644 /* Get the Card-Specific Data */
645 cmd.cmdidx = MMC_CMD_SEND_CSD;
646 cmd.resp_type = MMC_RSP_R2;
647 cmd.cmdarg = mmc->rca << 16;
650 err = mmc_send_cmd(mmc, &cmd, NULL);
655 mmc->csd[0] = cmd.response[0];
656 mmc->csd[1] = cmd.response[1];
657 mmc->csd[2] = cmd.response[2];
658 mmc->csd[3] = cmd.response[3];
660 if (mmc->version == MMC_VERSION_UNKNOWN) {
661 int version = (cmd.response[0] >> 26) & 0xf;
665 mmc->version = MMC_VERSION_1_2;
668 mmc->version = MMC_VERSION_1_4;
671 mmc->version = MMC_VERSION_2_2;
674 mmc->version = MMC_VERSION_3;
677 mmc->version = MMC_VERSION_4;
680 mmc->version = MMC_VERSION_1_2;
685 /* divide frequency by 10, since the mults are 10x bigger */
686 freq = fbase[(cmd.response[0] & 0x7)];
687 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
689 mmc->tran_speed = freq * mult;
691 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
694 mmc->write_bl_len = mmc->read_bl_len;
696 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
698 if (mmc->high_capacity) {
699 csize = (mmc->csd[1] & 0x3f) << 16
700 | (mmc->csd[2] & 0xffff0000) >> 16;
703 csize = (mmc->csd[1] & 0x3ff) << 2
704 | (mmc->csd[2] & 0xc0000000) >> 30;
705 cmult = (mmc->csd[2] & 0x00038000) >> 15;
708 mmc->capacity = (csize + 1) << (cmult + 2);
709 mmc->capacity *= mmc->read_bl_len;
711 if (mmc->read_bl_len > 512)
712 mmc->read_bl_len = 512;
714 if (mmc->write_bl_len > 512)
715 mmc->write_bl_len = 512;
717 /* Select the card, and put it into Transfer Mode */
718 cmd.cmdidx = MMC_CMD_SELECT_CARD;
719 cmd.resp_type = MMC_RSP_R1b;
720 cmd.cmdarg = mmc->rca << 16;
722 err = mmc_send_cmd(mmc, &cmd, NULL);
727 if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
728 /* check ext_csd version and capacity */
729 err = mmc_send_ext_csd(mmc, ext_csd);
730 if (!err & (ext_csd[192] >= 2)) {
731 mmc->capacity = ext_csd[212] << 0 | ext_csd[213] << 8 |
732 ext_csd[214] << 16 | ext_csd[215] << 24;
733 mmc->capacity *= 512;
738 err = sd_change_freq(mmc);
740 err = mmc_change_freq(mmc);
745 /* Restrict card's capabilities by what the host can do */
746 mmc->card_caps &= mmc->host_caps;
749 if (mmc->card_caps & MMC_MODE_4BIT) {
750 cmd.cmdidx = MMC_CMD_APP_CMD;
751 cmd.resp_type = MMC_RSP_R1;
752 cmd.cmdarg = mmc->rca << 16;
755 err = mmc_send_cmd(mmc, &cmd, NULL);
759 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
760 cmd.resp_type = MMC_RSP_R1;
763 err = mmc_send_cmd(mmc, &cmd, NULL);
767 mmc_set_bus_width(mmc, 4);
770 if (mmc->card_caps & MMC_MODE_HS)
771 mmc_set_clock(mmc, 50000000);
773 mmc_set_clock(mmc, 25000000);
775 if (mmc->card_caps & MMC_MODE_4BIT) {
776 /* Set the card to use 4 bit*/
777 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
779 EXT_CSD_BUS_WIDTH_4);
784 mmc_set_bus_width(mmc, 4);
785 } else if (mmc->card_caps & MMC_MODE_8BIT) {
786 /* Set the card to use 8 bit*/
787 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
789 EXT_CSD_BUS_WIDTH_8);
794 mmc_set_bus_width(mmc, 8);
797 if (mmc->card_caps & MMC_MODE_HS) {
798 if (mmc->card_caps & MMC_MODE_HS_52MHz)
799 mmc_set_clock(mmc, 52000000);
801 mmc_set_clock(mmc, 26000000);
803 mmc_set_clock(mmc, 20000000);
806 /* fill in device description */
807 mmc->block_dev.lun = 0;
808 mmc->block_dev.type = 0;
809 mmc->block_dev.blksz = mmc->read_bl_len;
810 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
811 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
812 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
813 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
814 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
815 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
816 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
817 (mmc->cid[2] >> 24) & 0xf);
818 init_part(&mmc->block_dev);
823 int mmc_send_if_cond(struct mmc *mmc)
828 cmd.cmdidx = SD_CMD_SEND_IF_COND;
829 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
830 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
831 cmd.resp_type = MMC_RSP_R7;
834 err = mmc_send_cmd(mmc, &cmd, NULL);
839 if ((cmd.response[0] & 0xff) != 0xaa)
842 mmc->version = SD_VERSION_2;
847 int mmc_register(struct mmc *mmc)
849 /* Setup the universal parts of the block interface just once */
850 mmc->block_dev.if_type = IF_TYPE_MMC;
851 mmc->block_dev.dev = cur_dev_num++;
852 mmc->block_dev.removable = 1;
853 mmc->block_dev.block_read = mmc_bread;
854 mmc->block_dev.block_write = mmc_bwrite;
856 INIT_LIST_HEAD (&mmc->link);
858 list_add_tail (&mmc->link, &mmc_devices);
863 block_dev_desc_t *mmc_get_dev(int dev)
865 struct mmc *mmc = find_mmc_device(dev);
867 return mmc ? &mmc->block_dev : NULL;
870 int mmc_init(struct mmc *mmc)
874 err = mmc->init(mmc);
879 mmc_set_bus_width(mmc, 1);
880 mmc_set_clock(mmc, 1);
883 err = mmc_go_idle(mmc);
888 /* Test for SD version 2 */
889 err = mmc_send_if_cond(mmc);
891 /* Now try to get the SD card's operating condition */
892 err = sd_send_op_cond(mmc);
894 /* If the command timed out, we check for an MMC card */
895 if (err == TIMEOUT) {
896 err = mmc_send_op_cond(mmc);
899 printf("Card did not respond to voltage select!\n");
904 return mmc_startup(mmc);
908 * CPU and board-specific MMC initializations. Aliased function
909 * signals caller to move on
911 static int __def_mmc_init(bd_t *bis)
916 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
917 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
919 void print_mmc_devices(char separator)
922 struct list_head *entry;
924 list_for_each(entry, &mmc_devices) {
925 m = list_entry(entry, struct mmc, link);
927 printf("%s: %d", m->name, m->block_dev.dev);
929 if (entry->next != &mmc_devices)
930 printf("%c ", separator);
936 int mmc_initialize(bd_t *bis)
938 INIT_LIST_HEAD (&mmc_devices);
941 if (board_mmc_init(bis) < 0)
944 print_mmc_devices(',');