diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mmc/mmc.c | 930 |
2 files changed, 931 insertions, 0 deletions
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index d496364..35aef31 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -25,6 +25,7 @@ include $(TOPDIR)/config.mk LIB := $(obj)libmmc.a +COBJS-$(CONFIG_GENERIC_MMC) += mmc.o COBJS-$(CONFIG_ATMEL_MCI) += atmel_mci.o COBJS-$(CONFIG_BFIN_SDH) += bfin_sdh.o COBJS-$(CONFIG_OMAP3_MMC) += omap3_mmc.o diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c new file mode 100644 index 0000000..96186d9 --- /dev/null +++ b/drivers/mmc/mmc.c @@ -0,0 +1,930 @@ +/* + * Copyright 2008, Freescale Semiconductor, Inc + * Andy Fleming + * + * Based vaguely on the Linux code + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <config.h> +#include <common.h> +#include <command.h> +#include <mmc.h> +#include <part.h> +#include <malloc.h> +#include <linux/list.h> +#include <mmc.h> + +static struct list_head mmc_devices; +static int cur_dev_num = -1; + +int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) +{ + return mmc->send_cmd(mmc, cmd, data); +} + +int mmc_set_blocklen(struct mmc *mmc, int len) +{ + struct mmc_cmd cmd; + + cmd.cmdidx = MMC_CMD_SET_BLOCKLEN; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = len; + cmd.flags = 0; + + return mmc_send_cmd(mmc, &cmd, NULL); +} + +struct mmc *find_mmc_device(int dev_num) +{ + struct mmc *m; + struct list_head *entry; + + list_for_each(entry, &mmc_devices) { + m = list_entry(entry, struct mmc, link); + + if (m->block_dev.dev == dev_num) + return m; + } + + printf("MMC Device %d not found\n", dev_num); + + return NULL; +} + +static ulong +mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src) +{ + struct mmc_cmd cmd; + struct mmc_data data; + int err; + int stoperr = 0; + struct mmc *mmc = find_mmc_device(dev_num); + int blklen; + + if (!mmc) + return -1; + + blklen = mmc->write_bl_len; + + err = mmc_set_blocklen(mmc, mmc->write_bl_len); + + if (err) { + printf("set write bl len failed\n\r"); + return err; + } + + if (blkcnt > 1) + cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK; + else + cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK; + + if (mmc->high_capacity) + cmd.cmdarg = start; + else + cmd.cmdarg = start * blklen; + + cmd.resp_type = MMC_RSP_R1; + cmd.flags = 0; + + data.src = src; + data.blocks = blkcnt; + data.blocksize = blklen; + data.flags = MMC_DATA_WRITE; + + err = mmc_send_cmd(mmc, &cmd, &data); + + if (err) { + printf("mmc write failed\n\r"); + return err; + } + + if (blkcnt > 1) { + cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION; + cmd.cmdarg = 0; + cmd.resp_type = MMC_RSP_R1b; + cmd.flags = 0; + stoperr = mmc_send_cmd(mmc, &cmd, NULL); + } + + return blkcnt; +} + +int mmc_read_block(struct mmc *mmc, void *dst, uint blocknum) +{ + struct mmc_cmd cmd; + struct mmc_data data; + + cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK; + + if (mmc->high_capacity) + cmd.cmdarg = blocknum; + else + cmd.cmdarg = blocknum * mmc->read_bl_len; + + cmd.resp_type = MMC_RSP_R1; + cmd.flags = 0; + + data.dest = dst; + data.blocks = 1; + data.blocksize = mmc->read_bl_len; + data.flags = MMC_DATA_READ; + + return mmc_send_cmd(mmc, &cmd, &data); +} + +int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size) +{ + char *buffer; + int i; + int blklen = mmc->read_bl_len; + int startblock = src / blklen; + int endblock = (src + size - 1) / blklen; + int err = 0; + + /* Make a buffer big enough to hold all the blocks we might read */ + buffer = malloc(blklen); + + if (!buffer) { + printf("Could not allocate buffer for MMC read!\n"); + return -1; + } + + /* We always do full block reads from the card */ + err = mmc_set_blocklen(mmc, mmc->read_bl_len); + + if (err) + return err; + + for (i = startblock; i <= endblock; i++) { + int segment_size; + int offset; + + err = mmc_read_block(mmc, buffer, i); + + if (err) + goto free_buffer; + + /* + * The first block may not be aligned, so we + * copy from the desired point in the block + */ + offset = (src & (blklen - 1)); + segment_size = MIN(blklen - offset, size); + + memcpy(dst, buffer + offset, segment_size); + + dst += segment_size; + src += segment_size; + size -= segment_size; + } + +free_buffer: + free(buffer); + + return err; +} + +static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst) +{ + int err; + int i; + struct mmc *mmc = find_mmc_device(dev_num); + + if (!mmc) + return 0; + + /* We always do full block reads from the card */ + err = mmc_set_blocklen(mmc, mmc->read_bl_len); + + if (err) { + return 0; + } + + for (i = start; i < start + blkcnt; i++, dst += mmc->read_bl_len) { + err = mmc_read_block(mmc, dst, i); + + if (err) { + printf("block read failed: %d\n", err); + return i - start; + } + } + + return blkcnt; +} + +int mmc_go_idle(struct mmc* mmc) +{ + struct mmc_cmd cmd; + int err; + + udelay(1000); + + cmd.cmdidx = MMC_CMD_GO_IDLE_STATE; + cmd.cmdarg = 0; + cmd.resp_type = MMC_RSP_NONE; + cmd.flags = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err) + return err; + + udelay(2000); + + return 0; +} + +int +sd_send_op_cond(struct mmc *mmc) +{ + int timeout = 1000; + int err; + struct mmc_cmd cmd; + + do { + cmd.cmdidx = MMC_CMD_APP_CMD; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = 0; + cmd.flags = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err) + return err; + + cmd.cmdidx = SD_CMD_APP_SEND_OP_COND; + cmd.resp_type = MMC_RSP_R3; + cmd.cmdarg = mmc->voltages; + + if (mmc->version == SD_VERSION_2) + cmd.cmdarg |= OCR_HCS; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err) + return err; + + udelay(1000); + } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--); + + if (timeout <= 0) + return UNUSABLE_ERR; + + if (mmc->version != SD_VERSION_2) + mmc->version = SD_VERSION_1_0; + + mmc->ocr = ((uint *)(cmd.response))[0]; + + mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS); + mmc->rca = 0; + + return 0; +} + +int mmc_send_op_cond(struct mmc *mmc) +{ + int timeout = 1000; + struct mmc_cmd cmd; + int err; + + /* Some cards seem to need this */ + mmc_go_idle(mmc); + + do { + cmd.cmdidx = MMC_CMD_SEND_OP_COND; + cmd.resp_type = MMC_RSP_R3; + cmd.cmdarg = OCR_HCS | mmc->voltages; + cmd.flags = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err) + return err; + + udelay(1000); + } while (!(cmd.response[0] & OCR_BUSY) && timeout--); + + if (timeout <= 0) + return UNUSABLE_ERR; + + mmc->version = MMC_VERSION_UNKNOWN; + mmc->ocr = ((uint *)(cmd.response))[0]; + + mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS); + mmc->rca = 0; + + return 0; +} + + +int mmc_send_ext_csd(struct mmc *mmc, char *ext_csd) +{ + struct mmc_cmd cmd; + struct mmc_data data; + int err; + + /* Get the Card Status Register */ + cmd.cmdidx = MMC_CMD_SEND_EXT_CSD; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = 0; + cmd.flags = 0; + + data.dest = ext_csd; + data.blocks = 1; + data.blocksize = 512; + data.flags = MMC_DATA_READ; + + err = mmc_send_cmd(mmc, &cmd, &data); + + return err; +} + + +int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value) +{ + struct mmc_cmd cmd; + + cmd.cmdidx = MMC_CMD_SWITCH; + cmd.resp_type = MMC_RSP_R1b; + cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | + (index << 16) | + (value << 8); + cmd.flags = 0; + + return mmc_send_cmd(mmc, &cmd, NULL); +} + +int mmc_change_freq(struct mmc *mmc) +{ + char ext_csd[512]; + char cardtype; + int err; + + mmc->card_caps = 0; + + /* Only version 4 supports high-speed */ + if (mmc->version < MMC_VERSION_4) + return 0; + + mmc->card_caps |= MMC_MODE_4BIT; + + err = mmc_send_ext_csd(mmc, ext_csd); + + if (err) + return err; + + if (ext_csd[212] || ext_csd[213] || ext_csd[214] || ext_csd[215]) + mmc->high_capacity = 1; + + cardtype = ext_csd[196] & 0xf; + + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1); + + if (err) + return err; + + /* Now check to see that it worked */ + err = mmc_send_ext_csd(mmc, ext_csd); + + if (err) + return err; + + /* No high-speed support */ + if (!ext_csd[185]) + return 0; + + /* High Speed is set, there are two types: 52MHz and 26MHz */ + if (cardtype & MMC_HS_52MHZ) + mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS; + else + mmc->card_caps |= MMC_MODE_HS; + + return 0; +} + +int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp) +{ + struct mmc_cmd cmd; + struct mmc_data data; + + /* Switch the frequency */ + cmd.cmdidx = SD_CMD_SWITCH_FUNC; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = (mode << 31) | 0xffffff; + cmd.cmdarg &= ~(0xf << (group * 4)); + cmd.cmdarg |= value << (group * 4); + cmd.flags = 0; + + data.dest = (char *)resp; + data.blocksize = 64; + data.blocks = 1; + data.flags = MMC_DATA_READ; + + return mmc_send_cmd(mmc, &cmd, &data); +} + + +int sd_change_freq(struct mmc *mmc) +{ + int err; + struct mmc_cmd cmd; + uint scr[2]; + uint switch_status[16]; + struct mmc_data data; + int timeout; + + mmc->card_caps = 0; + + /* Read the SCR to find out if this card supports higher speeds */ + cmd.cmdidx = MMC_CMD_APP_CMD; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = mmc->rca << 16; + cmd.flags = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err) + return err; + + cmd.cmdidx = SD_CMD_APP_SEND_SCR; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = 0; + cmd.flags = 0; + + timeout = 3; + +retry_scr: + data.dest = (char *)&scr; + data.blocksize = 8; + data.blocks = 1; + data.flags = MMC_DATA_READ; + + err = mmc_send_cmd(mmc, &cmd, &data); + + if (err) { + if (timeout--) + goto retry_scr; + + return err; + } + + mmc->scr[0] = scr[0]; + mmc->scr[1] = scr[1]; + + switch ((mmc->scr[0] >> 24) & 0xf) { + case 0: + mmc->version = SD_VERSION_1_0; + break; + case 1: + mmc->version = SD_VERSION_1_10; + break; + case 2: + mmc->version = SD_VERSION_2; + break; + default: + mmc->version = SD_VERSION_1_0; + break; + } + + /* Version 1.0 doesn't support switching */ + if (mmc->version == SD_VERSION_1_0) + return 0; + + timeout = 4; + while (timeout--) { + err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1, + (u8 *)&switch_status); + + if (err) + return err; + + /* The high-speed function is busy. Try again */ + if (!switch_status[7] & SD_HIGHSPEED_BUSY) + break; + } + + if (mmc->scr[0] & SD_DATA_4BIT) + mmc->card_caps |= MMC_MODE_4BIT; + + /* If high-speed isn't supported, we return */ + if (!(switch_status[3] & SD_HIGHSPEED_SUPPORTED)) + return 0; + + err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)&switch_status); + + if (err) + return err; + + if ((switch_status[4] & 0x0f000000) == 0x01000000) + mmc->card_caps |= MMC_MODE_HS; + + return 0; +} + +/* frequency bases */ +/* divided by 10 to be nice to platforms without floating point */ +int fbase[] = { + 10000, + 100000, + 1000000, + 10000000, +}; + +/* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice + * to platforms without floating point. + */ +int multipliers[] = { + 0, /* reserved */ + 10, + 12, + 13, + 15, + 20, + 25, + 30, + 35, + 40, + 45, + 50, + 55, + 60, + 70, + 80, +}; + +void mmc_set_ios(struct mmc *mmc) +{ + mmc->set_ios(mmc); +} + +void mmc_set_clock(struct mmc *mmc, uint clock) +{ + if (clock > mmc->f_max) + clock = mmc->f_max; + + if (clock < mmc->f_min) + clock = mmc->f_min; + + mmc->clock = clock; + + mmc_set_ios(mmc); +} + +void mmc_set_bus_width(struct mmc *mmc, uint width) +{ + mmc->bus_width = width; + + mmc_set_ios(mmc); +} + +int mmc_startup(struct mmc *mmc) +{ + int err; + uint mult, freq; + u64 cmult, csize; + struct mmc_cmd cmd; + + /* Put the Card in Identify Mode */ + cmd.cmdidx = MMC_CMD_ALL_SEND_CID; + cmd.resp_type = MMC_RSP_R2; + cmd.cmdarg = 0; + cmd.flags = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err) + return err; + + memcpy(mmc->cid, cmd.response, 16); + + /* + * For MMC cards, set the Relative Address. + * For SD cards, get the Relatvie Address. + * This also puts the cards into Standby State + */ + cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR; + cmd.cmdarg = mmc->rca << 16; + cmd.resp_type = MMC_RSP_R6; + cmd.flags = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err) + return err; + + if (IS_SD(mmc)) + mmc->rca = (((uint *)(cmd.response))[0] >> 16) & 0xffff; + + /* Get the Card-Specific Data */ + cmd.cmdidx = MMC_CMD_SEND_CSD; + cmd.resp_type = MMC_RSP_R2; + cmd.cmdarg = mmc->rca << 16; + cmd.flags = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err) + return err; + + mmc->csd[0] = ((uint *)(cmd.response))[0]; + mmc->csd[1] = ((uint *)(cmd.response))[1]; + mmc->csd[2] = ((uint *)(cmd.response))[2]; + mmc->csd[3] = ((uint *)(cmd.response))[3]; + + if (mmc->version == MMC_VERSION_UNKNOWN) { + int version = (cmd.response[0] >> 2) & 0xf; + + switch (version) { + case 0: + mmc->version = MMC_VERSION_1_2; + break; + case 1: + mmc->version = MMC_VERSION_1_4; + break; + case 2: + mmc->version = MMC_VERSION_2_2; + break; + case 3: + mmc->version = MMC_VERSION_3; + break; + case 4: + mmc->version = MMC_VERSION_4; + break; + default: + mmc->version = MMC_VERSION_1_2; + break; + } + } + + /* divide frequency by 10, since the mults are 10x bigger */ + freq = fbase[(cmd.response[3] & 0x7)]; + mult = multipliers[((cmd.response[3] >> 3) & 0xf)]; + + mmc->tran_speed = freq * mult; + + mmc->read_bl_len = 1 << ((((uint *)(cmd.response))[1] >> 16) & 0xf); + + if (IS_SD(mmc)) + mmc->write_bl_len = mmc->read_bl_len; + else + mmc->write_bl_len = 1 << ((((uint *)(cmd.response))[3] >> 22) & 0xf); + + if (mmc->high_capacity) { + csize = (mmc->csd[1] & 0x3f) << 16 + | (mmc->csd[2] & 0xffff0000) >> 16; + cmult = 8; + } else { + csize = (mmc->csd[1] & 0x3ff) << 2 + | (mmc->csd[2] & 0xc0000000) >> 30; + cmult = (mmc->csd[2] & 0x00038000) >> 15; + } + + mmc->capacity = (csize + 1) << (cmult + 2); + mmc->capacity *= mmc->read_bl_len; + + if (mmc->read_bl_len > 512) + mmc->read_bl_len = 512; + + if (mmc->write_bl_len > 512) + mmc->write_bl_len = 512; + + /* Select the card, and put it into Transfer Mode */ + cmd.cmdidx = MMC_CMD_SELECT_CARD; + cmd.resp_type = MMC_RSP_R1b; + cmd.cmdarg = mmc->rca << 16; + cmd.flags = 0; + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err) + return err; + + if (IS_SD(mmc)) + err = sd_change_freq(mmc); + else + err = mmc_change_freq(mmc); + + if (err) + return err; + + /* Restrict card's capabilities by what the host can do */ + mmc->card_caps &= mmc->host_caps; + + if (IS_SD(mmc)) { + if (mmc->card_caps & MMC_MODE_4BIT) { + cmd.cmdidx = MMC_CMD_APP_CMD; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = mmc->rca << 16; + cmd.flags = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err) + return err; + + cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = 2; + cmd.flags = 0; + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err) + return err; + + mmc_set_bus_width(mmc, 4); + } + + if (mmc->card_caps & MMC_MODE_HS) + mmc_set_clock(mmc, 50000000); + else + mmc_set_clock(mmc, 25000000); + } else { + if (mmc->card_caps & MMC_MODE_4BIT) { + /* Set the card to use 4 bit*/ + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_BUS_WIDTH, + EXT_CSD_BUS_WIDTH_4); + + if (err) + return err; + + mmc_set_bus_width(mmc, 4); + } else if (mmc->card_caps & MMC_MODE_8BIT) { + /* Set the card to use 8 bit*/ + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_BUS_WIDTH, + EXT_CSD_BUS_WIDTH_8); + + if (err) + return err; + + mmc_set_bus_width(mmc, 8); + } + + if (mmc->card_caps & MMC_MODE_HS) { + if (mmc->card_caps & MMC_MODE_HS_52MHz) + mmc_set_clock(mmc, 52000000); + else + mmc_set_clock(mmc, 26000000); + } else + mmc_set_clock(mmc, 20000000); + } + + /* fill in device description */ + mmc->block_dev.lun = 0; + mmc->block_dev.type = 0; + mmc->block_dev.blksz = mmc->read_bl_len; + mmc->block_dev.lba = mmc->capacity/mmc->read_bl_len; + sprintf(mmc->block_dev.vendor,"Man %02x%02x%02x Snr %02x%02x%02x%02x", + mmc->cid[0], mmc->cid[1], mmc->cid[2], + mmc->cid[9], mmc->cid[10], mmc->cid[11], mmc->cid[12]); + sprintf(mmc->block_dev.product,"%c%c%c%c%c", mmc->cid[3], + mmc->cid[4], mmc->cid[5], mmc->cid[6], mmc->cid[7]); + sprintf(mmc->block_dev.revision,"%d.%d", mmc->cid[8] >> 4, + mmc->cid[8] & 0xf); + init_part(&mmc->block_dev); + + return 0; +} + +int mmc_send_if_cond(struct mmc *mmc) +{ + struct mmc_cmd cmd; + int err; + + cmd.cmdidx = SD_CMD_SEND_IF_COND; + /* We set the bit if the host supports voltages between 2.7 and 3.6 V */ + cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa; + cmd.resp_type = MMC_RSP_R7; + cmd.flags = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err) + return err; + + if ((((uint *)(cmd.response))[0] & 0xff) != 0xaa) + return UNUSABLE_ERR; + else + mmc->version = SD_VERSION_2; + + return 0; +} + +int mmc_register(struct mmc *mmc) +{ + /* Setup the universal parts of the block interface just once */ + mmc->block_dev.if_type = IF_TYPE_MMC; + mmc->block_dev.dev = cur_dev_num++; + mmc->block_dev.removable = 1; + mmc->block_dev.block_read = mmc_bread; + mmc->block_dev.block_write = mmc_bwrite; + + INIT_LIST_HEAD (&mmc->link); + + list_add_tail (&mmc->link, &mmc_devices); + + return 0; +} + +block_dev_desc_t *mmc_get_dev(int dev) +{ + struct mmc *mmc = find_mmc_device(dev); + + return &mmc->block_dev; +} + +int mmc_init(struct mmc *mmc) +{ + int err; + + err = mmc->init(mmc); + + if (err) + return err; + + /* Reset the Card */ + err = mmc_go_idle(mmc); + + if (err) + return err; + + /* Test for SD version 2 */ + err = mmc_send_if_cond(mmc); + + /* If we got an error other than timeout, we bail */ + if (err && err != TIMEOUT) + return err; + + /* Now try to get the SD card's operating condition */ + err = sd_send_op_cond(mmc); + + /* If the command timed out, we check for an MMC card */ + if (err == TIMEOUT) { + err = mmc_send_op_cond(mmc); + + if (err) { + printf("Card did not respond to voltage select!\n"); + return UNUSABLE_ERR; + } + } + + return mmc_startup(mmc); +} + +/* + * CPU and board-specific MMC initializations. Aliased function + * signals caller to move on + */ +static int __def_mmc_init(bd_t *bis) +{ + return -1; +} + +int cpu_mmc_init(bd_t *bis) __attribute((weak, alias("__def_mmc_init"))); +int board_mmc_init(bd_t *bis) __attribute((weak, alias("__def_mmc_init"))); + +void print_mmc_devices(char separator) +{ + struct mmc *m; + struct list_head *entry; + + list_for_each(entry, &mmc_devices) { + m = list_entry(entry, struct mmc, link); + + printf("%s: %d", m->name, m->block_dev.dev); + + if (entry->next != &mmc_devices) + printf("%c ", separator); + } + + printf("\n"); +} + +int mmc_initialize(bd_t *bis) +{ + INIT_LIST_HEAD (&mmc_devices); + cur_dev_num = 0; + + if (board_mmc_init(bis) < 0) + cpu_mmc_init(bis); + + print_mmc_devices(','); + + return 0; +} |