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 err = mmc_set_blocklen(mmc, mmc->write_bl_len);
98 printf("set write bl len failed\n\r");
103 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
105 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
107 if (mmc->high_capacity)
110 cmd.cmdarg = start * blklen;
112 cmd.resp_type = MMC_RSP_R1;
116 data.blocks = blkcnt;
117 data.blocksize = blklen;
118 data.flags = MMC_DATA_WRITE;
120 err = mmc_send_cmd(mmc, &cmd, &data);
123 printf("mmc write failed\n\r");
128 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
130 cmd.resp_type = MMC_RSP_R1b;
132 stoperr = mmc_send_cmd(mmc, &cmd, NULL);
138 int mmc_read_block(struct mmc *mmc, void *dst, uint blocknum)
141 struct mmc_data data;
143 cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
145 if (mmc->high_capacity)
146 cmd.cmdarg = blocknum;
148 cmd.cmdarg = blocknum * mmc->read_bl_len;
150 cmd.resp_type = MMC_RSP_R1;
155 data.blocksize = mmc->read_bl_len;
156 data.flags = MMC_DATA_READ;
158 return mmc_send_cmd(mmc, &cmd, &data);
161 int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size)
165 int blklen = mmc->read_bl_len;
166 int startblock = lldiv(src, mmc->read_bl_len);
167 int endblock = lldiv(src + size - 1, mmc->read_bl_len);
170 /* Make a buffer big enough to hold all the blocks we might read */
171 buffer = malloc(blklen);
174 printf("Could not allocate buffer for MMC read!\n");
178 /* We always do full block reads from the card */
179 err = mmc_set_blocklen(mmc, mmc->read_bl_len);
184 for (i = startblock; i <= endblock; i++) {
188 err = mmc_read_block(mmc, buffer, i);
194 * The first block may not be aligned, so we
195 * copy from the desired point in the block
197 offset = (src & (blklen - 1));
198 segment_size = MIN(blklen - offset, size);
200 memcpy(dst, buffer + offset, segment_size);
204 size -= segment_size;
213 static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
217 struct mmc *mmc = find_mmc_device(dev_num);
222 /* We always do full block reads from the card */
223 err = mmc_set_blocklen(mmc, mmc->read_bl_len);
229 for (i = start; i < start + blkcnt; i++, dst += mmc->read_bl_len) {
230 err = mmc_read_block(mmc, dst, i);
233 printf("block read failed: %d\n", err);
241 int mmc_go_idle(struct mmc* mmc)
248 cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
250 cmd.resp_type = MMC_RSP_NONE;
253 err = mmc_send_cmd(mmc, &cmd, NULL);
264 sd_send_op_cond(struct mmc *mmc)
271 cmd.cmdidx = MMC_CMD_APP_CMD;
272 cmd.resp_type = MMC_RSP_R1;
276 err = mmc_send_cmd(mmc, &cmd, NULL);
281 cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
282 cmd.resp_type = MMC_RSP_R3;
285 * Most cards do not answer if some reserved bits
286 * in the ocr are set. However, Some controller
287 * can set bit 7 (reserved for low voltages), but
288 * how to manage low voltages SD card is not yet
291 cmd.cmdarg = mmc->voltages & 0xff8000;
293 if (mmc->version == SD_VERSION_2)
294 cmd.cmdarg |= OCR_HCS;
296 err = mmc_send_cmd(mmc, &cmd, NULL);
302 } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
307 if (mmc->version != SD_VERSION_2)
308 mmc->version = SD_VERSION_1_0;
310 mmc->ocr = cmd.response[0];
312 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
318 int mmc_send_op_cond(struct mmc *mmc)
324 /* Some cards seem to need this */
328 cmd.cmdidx = MMC_CMD_SEND_OP_COND;
329 cmd.resp_type = MMC_RSP_R3;
330 cmd.cmdarg = OCR_HCS | mmc->voltages;
333 err = mmc_send_cmd(mmc, &cmd, NULL);
339 } while (!(cmd.response[0] & OCR_BUSY) && timeout--);
344 mmc->version = MMC_VERSION_UNKNOWN;
345 mmc->ocr = cmd.response[0];
347 mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
354 int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd)
357 struct mmc_data data;
360 /* Get the Card Status Register */
361 cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
362 cmd.resp_type = MMC_RSP_R1;
368 data.blocksize = 512;
369 data.flags = MMC_DATA_READ;
371 err = mmc_send_cmd(mmc, &cmd, &data);
377 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
381 cmd.cmdidx = MMC_CMD_SWITCH;
382 cmd.resp_type = MMC_RSP_R1b;
383 cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
388 return mmc_send_cmd(mmc, &cmd, NULL);
391 int mmc_change_freq(struct mmc *mmc)
399 /* Only version 4 supports high-speed */
400 if (mmc->version < MMC_VERSION_4)
403 mmc->card_caps |= MMC_MODE_4BIT;
405 err = mmc_send_ext_csd(mmc, ext_csd);
410 if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215])
411 mmc->high_capacity = 1;
413 cardtype = ext_csd[196] & 0xf;
415 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
420 /* Now check to see that it worked */
421 err = mmc_send_ext_csd(mmc, ext_csd);
426 /* No high-speed support */
430 /* High Speed is set, there are two types: 52MHz and 26MHz */
431 if (cardtype & MMC_HS_52MHZ)
432 mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
434 mmc->card_caps |= MMC_MODE_HS;
439 int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
442 struct mmc_data data;
444 /* Switch the frequency */
445 cmd.cmdidx = SD_CMD_SWITCH_FUNC;
446 cmd.resp_type = MMC_RSP_R1;
447 cmd.cmdarg = (mode << 31) | 0xffffff;
448 cmd.cmdarg &= ~(0xf << (group * 4));
449 cmd.cmdarg |= value << (group * 4);
452 data.dest = (char *)resp;
455 data.flags = MMC_DATA_READ;
457 return mmc_send_cmd(mmc, &cmd, &data);
461 int sd_change_freq(struct mmc *mmc)
466 uint switch_status[16];
467 struct mmc_data data;
472 /* Read the SCR to find out if this card supports higher speeds */
473 cmd.cmdidx = MMC_CMD_APP_CMD;
474 cmd.resp_type = MMC_RSP_R1;
475 cmd.cmdarg = mmc->rca << 16;
478 err = mmc_send_cmd(mmc, &cmd, NULL);
483 cmd.cmdidx = SD_CMD_APP_SEND_SCR;
484 cmd.resp_type = MMC_RSP_R1;
491 data.dest = (char *)&scr;
494 data.flags = MMC_DATA_READ;
496 err = mmc_send_cmd(mmc, &cmd, &data);
505 mmc->scr[0] = __be32_to_cpu(scr[0]);
506 mmc->scr[1] = __be32_to_cpu(scr[1]);
508 switch ((mmc->scr[0] >> 24) & 0xf) {
510 mmc->version = SD_VERSION_1_0;
513 mmc->version = SD_VERSION_1_10;
516 mmc->version = SD_VERSION_2;
519 mmc->version = SD_VERSION_1_0;
523 /* Version 1.0 doesn't support switching */
524 if (mmc->version == SD_VERSION_1_0)
529 err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
530 (u8 *)&switch_status);
535 /* The high-speed function is busy. Try again */
536 if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
540 if (mmc->scr[0] & SD_DATA_4BIT)
541 mmc->card_caps |= MMC_MODE_4BIT;
543 /* If high-speed isn't supported, we return */
544 if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
547 err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status);
552 if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
553 mmc->card_caps |= MMC_MODE_HS;
558 /* frequency bases */
559 /* divided by 10 to be nice to platforms without floating point */
567 /* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
568 * to platforms without floating point.
570 int multipliers[] = {
589 void mmc_set_ios(struct mmc *mmc)
594 void mmc_set_clock(struct mmc *mmc, uint clock)
596 if (clock > mmc->f_max)
599 if (clock < mmc->f_min)
607 void mmc_set_bus_width(struct mmc *mmc, uint width)
609 mmc->bus_width = width;
614 int mmc_startup(struct mmc *mmc)
621 /* Put the Card in Identify Mode */
622 cmd.cmdidx = MMC_CMD_ALL_SEND_CID;
623 cmd.resp_type = MMC_RSP_R2;
627 err = mmc_send_cmd(mmc, &cmd, NULL);
632 memcpy(mmc->cid, cmd.response, 16);
635 * For MMC cards, set the Relative Address.
636 * For SD cards, get the Relatvie Address.
637 * This also puts the cards into Standby State
639 cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
640 cmd.cmdarg = mmc->rca << 16;
641 cmd.resp_type = MMC_RSP_R6;
644 err = mmc_send_cmd(mmc, &cmd, NULL);
650 mmc->rca = (cmd.response[0] >> 16) & 0xffff;
652 /* Get the Card-Specific Data */
653 cmd.cmdidx = MMC_CMD_SEND_CSD;
654 cmd.resp_type = MMC_RSP_R2;
655 cmd.cmdarg = mmc->rca << 16;
658 err = mmc_send_cmd(mmc, &cmd, NULL);
663 mmc->csd[0] = cmd.response[0];
664 mmc->csd[1] = cmd.response[1];
665 mmc->csd[2] = cmd.response[2];
666 mmc->csd[3] = cmd.response[3];
668 if (mmc->version == MMC_VERSION_UNKNOWN) {
669 int version = (cmd.response[0] >> 26) & 0xf;
673 mmc->version = MMC_VERSION_1_2;
676 mmc->version = MMC_VERSION_1_4;
679 mmc->version = MMC_VERSION_2_2;
682 mmc->version = MMC_VERSION_3;
685 mmc->version = MMC_VERSION_4;
688 mmc->version = MMC_VERSION_1_2;
693 /* divide frequency by 10, since the mults are 10x bigger */
694 freq = fbase[(cmd.response[0] & 0x7)];
695 mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
697 mmc->tran_speed = freq * mult;
699 mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
702 mmc->write_bl_len = mmc->read_bl_len;
704 mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
706 if (mmc->high_capacity) {
707 csize = (mmc->csd[1] & 0x3f) << 16
708 | (mmc->csd[2] & 0xffff0000) >> 16;
711 csize = (mmc->csd[1] & 0x3ff) << 2
712 | (mmc->csd[2] & 0xc0000000) >> 30;
713 cmult = (mmc->csd[2] & 0x00038000) >> 15;
716 mmc->capacity = (csize + 1) << (cmult + 2);
717 mmc->capacity *= mmc->read_bl_len;
719 if (mmc->read_bl_len > 512)
720 mmc->read_bl_len = 512;
722 if (mmc->write_bl_len > 512)
723 mmc->write_bl_len = 512;
725 /* Select the card, and put it into Transfer Mode */
726 cmd.cmdidx = MMC_CMD_SELECT_CARD;
727 cmd.resp_type = MMC_RSP_R1b;
728 cmd.cmdarg = mmc->rca << 16;
730 err = mmc_send_cmd(mmc, &cmd, NULL);
736 err = sd_change_freq(mmc);
738 err = mmc_change_freq(mmc);
743 /* Restrict card's capabilities by what the host can do */
744 mmc->card_caps &= mmc->host_caps;
747 if (mmc->card_caps & MMC_MODE_4BIT) {
748 cmd.cmdidx = MMC_CMD_APP_CMD;
749 cmd.resp_type = MMC_RSP_R1;
750 cmd.cmdarg = mmc->rca << 16;
753 err = mmc_send_cmd(mmc, &cmd, NULL);
757 cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
758 cmd.resp_type = MMC_RSP_R1;
761 err = mmc_send_cmd(mmc, &cmd, NULL);
765 mmc_set_bus_width(mmc, 4);
768 if (mmc->card_caps & MMC_MODE_HS)
769 mmc_set_clock(mmc, 50000000);
771 mmc_set_clock(mmc, 25000000);
773 if (mmc->card_caps & MMC_MODE_4BIT) {
774 /* Set the card to use 4 bit*/
775 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
777 EXT_CSD_BUS_WIDTH_4);
782 mmc_set_bus_width(mmc, 4);
783 } else if (mmc->card_caps & MMC_MODE_8BIT) {
784 /* Set the card to use 8 bit*/
785 err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
787 EXT_CSD_BUS_WIDTH_8);
792 mmc_set_bus_width(mmc, 8);
795 if (mmc->card_caps & MMC_MODE_HS) {
796 if (mmc->card_caps & MMC_MODE_HS_52MHz)
797 mmc_set_clock(mmc, 52000000);
799 mmc_set_clock(mmc, 26000000);
801 mmc_set_clock(mmc, 20000000);
804 /* fill in device description */
805 mmc->block_dev.lun = 0;
806 mmc->block_dev.type = 0;
807 mmc->block_dev.blksz = mmc->read_bl_len;
808 mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
809 sprintf(mmc->block_dev.vendor, "Man %06x Snr %08x", mmc->cid[0] >> 8,
810 (mmc->cid[2] << 8) | (mmc->cid[3] >> 24));
811 sprintf(mmc->block_dev.product, "%c%c%c%c%c", mmc->cid[0] & 0xff,
812 (mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
813 (mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
814 sprintf(mmc->block_dev.revision, "%d.%d", mmc->cid[2] >> 28,
815 (mmc->cid[2] >> 24) & 0xf);
816 init_part(&mmc->block_dev);
821 int mmc_send_if_cond(struct mmc *mmc)
826 cmd.cmdidx = SD_CMD_SEND_IF_COND;
827 /* We set the bit if the host supports voltages between 2.7 and 3.6 V */
828 cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
829 cmd.resp_type = MMC_RSP_R7;
832 err = mmc_send_cmd(mmc, &cmd, NULL);
837 if ((cmd.response[0] & 0xff) != 0xaa)
840 mmc->version = SD_VERSION_2;
845 int mmc_register(struct mmc *mmc)
847 /* Setup the universal parts of the block interface just once */
848 mmc->block_dev.if_type = IF_TYPE_MMC;
849 mmc->block_dev.dev = cur_dev_num++;
850 mmc->block_dev.removable = 1;
851 mmc->block_dev.block_read = mmc_bread;
852 mmc->block_dev.block_write = mmc_bwrite;
854 INIT_LIST_HEAD (&mmc->link);
856 list_add_tail (&mmc->link, &mmc_devices);
861 block_dev_desc_t *mmc_get_dev(int dev)
863 struct mmc *mmc = find_mmc_device(dev);
865 return mmc ? &mmc->block_dev : NULL;
868 int mmc_init(struct mmc *mmc)
872 err = mmc->init(mmc);
877 mmc_set_bus_width(mmc, 1);
878 mmc_set_clock(mmc, 1);
881 err = mmc_go_idle(mmc);
886 /* Test for SD version 2 */
887 err = mmc_send_if_cond(mmc);
889 /* Now try to get the SD card's operating condition */
890 err = sd_send_op_cond(mmc);
892 /* If the command timed out, we check for an MMC card */
893 if (err == TIMEOUT) {
894 err = mmc_send_op_cond(mmc);
897 printf("Card did not respond to voltage select!\n");
902 return mmc_startup(mmc);
906 * CPU and board-specific MMC initializations. Aliased function
907 * signals caller to move on
909 static int __def_mmc_init(bd_t *bis)
914 int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
915 int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
917 void print_mmc_devices(char separator)
920 struct list_head *entry;
922 list_for_each(entry, &mmc_devices) {
923 m = list_entry(entry, struct mmc, link);
925 printf("%s: %d", m->name, m->block_dev.dev);
927 if (entry->next != &mmc_devices)
928 printf("%c ", separator);
934 int mmc_initialize(bd_t *bis)
936 INIT_LIST_HEAD (&mmc_devices);
939 if (board_mmc_init(bis) < 0)
942 print_mmc_devices(',');