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path: root/drivers/mmc/mmc.c
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-rw-r--r--drivers/mmc/mmc.c930
1 files changed, 930 insertions, 0 deletions
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;
+}
generated by cgit v1.1 at 2024-11-24 16:20:56 +0000