static struct list_head mmc_devices;
static int cur_dev_num = -1;
+static int mmc_dev_count;
__weak int board_mmc_getwp(struct mmc *mmc)
{
udelay(1000);
} while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
-
- if (timeout <= 0)
+ if (!(cmd.response[0] & OCR_BUSY))
return UNUSABLE_ERR;
if (mmc->version != SD_VERSION_2)
/* Some cards seem to need this */
mmc_go_idle(mmc);
- /* Asking to the card its capabilities */
+ /* Asking to the card its capabilities */
mmc->op_cond_pending = 1;
for (i = 0; i < 2; i++) {
err = mmc_send_op_cond_iter(mmc, &cmd, i != 0);
if (err)
return err;
if (get_timer(start) > timeout)
- return UNUSABLE_ERR;
+ break;
udelay(100);
} while (!(mmc->op_cond_response & OCR_BUSY));
+ if (!(mmc->op_cond_response & OCR_BUSY)) {
+ debug("%s: timeout\n", __func__);
+ return UNUSABLE_ERR;
+ }
if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
char cardtype;
int err;
- mmc->card_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
+ mmc->card_caps = 0;
if (mmc_host_is_spi(mmc))
return 0;
if (mmc->version < MMC_VERSION_4)
return 0;
+ mmc->card_caps |= MMC_MODE_4BIT | MMC_MODE_8BIT;
+
err = mmc_send_ext_csd(mmc, ext_csd);
if (err)
return ret;
}
+int mmc_hwpart_config(struct mmc *mmc,
+ const struct mmc_hwpart_conf *conf,
+ enum mmc_hwpart_conf_mode mode)
+{
+ u8 part_attrs = 0;
+ u32 enh_size_mult;
+ u32 enh_start_addr;
+ u32 gp_size_mult[4];
+ u32 max_enh_size_mult;
+ u32 tot_enh_size_mult = 0;
+ u8 wr_rel_set;
+ int i, pidx, err;
+ ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
+
+ if (mode < MMC_HWPART_CONF_CHECK || mode > MMC_HWPART_CONF_COMPLETE)
+ return -EINVAL;
+
+ if (IS_SD(mmc) || (mmc->version < MMC_VERSION_4_41)) {
+ printf("eMMC >= 4.4 required for enhanced user data area\n");
+ return -EMEDIUMTYPE;
+ }
+
+ if (!(mmc->part_support & PART_SUPPORT)) {
+ printf("Card does not support partitioning\n");
+ return -EMEDIUMTYPE;
+ }
+
+ if (!mmc->hc_wp_grp_size) {
+ printf("Card does not define HC WP group size\n");
+ return -EMEDIUMTYPE;
+ }
+
+ /* check partition alignment and total enhanced size */
+ if (conf->user.enh_size) {
+ if (conf->user.enh_size % mmc->hc_wp_grp_size ||
+ conf->user.enh_start % mmc->hc_wp_grp_size) {
+ printf("User data enhanced area not HC WP group "
+ "size aligned\n");
+ return -EINVAL;
+ }
+ part_attrs |= EXT_CSD_ENH_USR;
+ enh_size_mult = conf->user.enh_size / mmc->hc_wp_grp_size;
+ if (mmc->high_capacity) {
+ enh_start_addr = conf->user.enh_start;
+ } else {
+ enh_start_addr = (conf->user.enh_start << 9);
+ }
+ } else {
+ enh_size_mult = 0;
+ enh_start_addr = 0;
+ }
+ tot_enh_size_mult += enh_size_mult;
+
+ for (pidx = 0; pidx < 4; pidx++) {
+ if (conf->gp_part[pidx].size % mmc->hc_wp_grp_size) {
+ printf("GP%i partition not HC WP group size "
+ "aligned\n", pidx+1);
+ return -EINVAL;
+ }
+ gp_size_mult[pidx] = conf->gp_part[pidx].size / mmc->hc_wp_grp_size;
+ if (conf->gp_part[pidx].size && conf->gp_part[pidx].enhanced) {
+ part_attrs |= EXT_CSD_ENH_GP(pidx);
+ tot_enh_size_mult += gp_size_mult[pidx];
+ }
+ }
+
+ if (part_attrs && ! (mmc->part_support & ENHNCD_SUPPORT)) {
+ printf("Card does not support enhanced attribute\n");
+ return -EMEDIUMTYPE;
+ }
+
+ err = mmc_send_ext_csd(mmc, ext_csd);
+ if (err)
+ return err;
+
+ max_enh_size_mult =
+ (ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT+2] << 16) +
+ (ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT+1] << 8) +
+ ext_csd[EXT_CSD_MAX_ENH_SIZE_MULT];
+ if (tot_enh_size_mult > max_enh_size_mult) {
+ printf("Total enhanced size exceeds maximum (%u > %u)\n",
+ tot_enh_size_mult, max_enh_size_mult);
+ return -EMEDIUMTYPE;
+ }
+
+ /* The default value of EXT_CSD_WR_REL_SET is device
+ * dependent, the values can only be changed if the
+ * EXT_CSD_HS_CTRL_REL bit is set. The values can be
+ * changed only once and before partitioning is completed. */
+ wr_rel_set = ext_csd[EXT_CSD_WR_REL_SET];
+ if (conf->user.wr_rel_change) {
+ if (conf->user.wr_rel_set)
+ wr_rel_set |= EXT_CSD_WR_DATA_REL_USR;
+ else
+ wr_rel_set &= ~EXT_CSD_WR_DATA_REL_USR;
+ }
+ for (pidx = 0; pidx < 4; pidx++) {
+ if (conf->gp_part[pidx].wr_rel_change) {
+ if (conf->gp_part[pidx].wr_rel_set)
+ wr_rel_set |= EXT_CSD_WR_DATA_REL_GP(pidx);
+ else
+ wr_rel_set &= ~EXT_CSD_WR_DATA_REL_GP(pidx);
+ }
+ }
+
+ if (wr_rel_set != ext_csd[EXT_CSD_WR_REL_SET] &&
+ !(ext_csd[EXT_CSD_WR_REL_PARAM] & EXT_CSD_HS_CTRL_REL)) {
+ puts("Card does not support host controlled partition write "
+ "reliability settings\n");
+ return -EMEDIUMTYPE;
+ }
+
+ if (ext_csd[EXT_CSD_PARTITION_SETTING] &
+ EXT_CSD_PARTITION_SETTING_COMPLETED) {
+ printf("Card already partitioned\n");
+ return -EPERM;
+ }
+
+ if (mode == MMC_HWPART_CONF_CHECK)
+ return 0;
+
+ /* Partitioning requires high-capacity size definitions */
+ if (!(ext_csd[EXT_CSD_ERASE_GROUP_DEF] & 0x01)) {
+ err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_ERASE_GROUP_DEF, 1);
+
+ if (err)
+ return err;
+
+ ext_csd[EXT_CSD_ERASE_GROUP_DEF] = 1;
+
+ /* update erase group size to be high-capacity */
+ mmc->erase_grp_size =
+ ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 1024;
+
+ }
+
+ /* all OK, write the configuration */
+ for (i = 0; i < 4; i++) {
+ err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_ENH_START_ADDR+i,
+ (enh_start_addr >> (i*8)) & 0xFF);
+ if (err)
+ return err;
+ }
+ for (i = 0; i < 3; i++) {
+ err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_ENH_SIZE_MULT+i,
+ (enh_size_mult >> (i*8)) & 0xFF);
+ if (err)
+ return err;
+ }
+ for (pidx = 0; pidx < 4; pidx++) {
+ for (i = 0; i < 3; i++) {
+ err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_GP_SIZE_MULT+pidx*3+i,
+ (gp_size_mult[pidx] >> (i*8)) & 0xFF);
+ if (err)
+ return err;
+ }
+ }
+ err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_PARTITIONS_ATTRIBUTE, part_attrs);
+ if (err)
+ return err;
+
+ if (mode == MMC_HWPART_CONF_SET)
+ return 0;
+
+ /* The WR_REL_SET is a write-once register but shall be
+ * written before setting PART_SETTING_COMPLETED. As it is
+ * write-once we can only write it when completing the
+ * partitioning. */
+ if (wr_rel_set != ext_csd[EXT_CSD_WR_REL_SET]) {
+ err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_WR_REL_SET, wr_rel_set);
+ if (err)
+ return err;
+ }
+
+ /* Setting PART_SETTING_COMPLETED confirms the partition
+ * configuration but it only becomes effective after power
+ * cycle, so we do not adjust the partition related settings
+ * in the mmc struct. */
+
+ err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_PARTITION_SETTING,
+ EXT_CSD_PARTITION_SETTING_COMPLETED);
+ if (err)
+ return err;
+
+ return 0;
+}
+
int mmc_getcd(struct mmc *mmc)
{
int cd;
if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
/* check ext_csd version and capacity */
err = mmc_send_ext_csd(mmc, ext_csd);
- if (!err && (ext_csd[EXT_CSD_REV] >= 2)) {
+ if (err)
+ return err;
+ if (ext_csd[EXT_CSD_REV] >= 2) {
/*
* According to the JEDEC Standard, the value of
* ext_csd's capacity is valid if the value is more
mmc->hc_wp_grp_size = 1024
* ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
* ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+
+ mmc->wr_rel_set = ext_csd[EXT_CSD_WR_REL_SET];
}
err = mmc_set_capacity(mmc, mmc->part_num);
mmc->tran_speed = 50000000;
else
mmc->tran_speed = 25000000;
- } else {
+ } else if (mmc->version >= MMC_VERSION_4) {
+ /* Only version 4 of MMC supports wider bus widths */
int idx;
/* An array of possible bus widths in order of preference */
unsigned int extw = ext_csd_bits[idx];
unsigned int caps = ext_to_hostcaps[extw];
+ /*
+ * If the bus width is still not changed,
+ * don't try to set the default again.
+ * Otherwise, recover from switch attempts
+ * by switching to 1-bit bus width.
+ */
+ if (extw == EXT_CSD_BUS_WIDTH_1 &&
+ mmc->bus_width == 1) {
+ err = 0;
+ break;
+ }
+
/*
* Check to make sure the card and controller support
* these capabilities
INIT_LIST_HEAD(&mmc->link);
list_add_tail(&mmc->link, &mmc_devices);
+ mmc_dev_count++;
return mmc;
}
return cur_dev_num;
}
+int get_mmc_dev_count(void)
+{
+ return mmc_dev_count;
+}
+
void mmc_set_preinit(struct mmc *mmc, int preinit)
{
mmc->preinit = preinit;
*/
int mmc_set_rst_n_function(struct mmc *mmc, u8 enable)
{
+ int ret;
+ ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN);
+
+ ret = mmc_send_ext_csd(mmc, ext_csd);
+ if (ret)
+ return ret;
+
+ if (ext_csd[EXT_CSD_RST_N_FUNCTION] != 0 &&
+ ext_csd[EXT_CSD_RST_N_FUNCTION] != enable) {
+ printf("RST_N_FUNCTION is already set to %u; cannot change to %u\n",
+ ext_csd[EXT_CSD_RST_N_FUNCTION], enable);
+ return -EINVAL;
+ }
return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_RST_N_FUNCTION,
enable);
}