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-rw-r--r--drivers/mmc/mmc.c155
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 63a1e0c..2a42e50 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -605,6 +605,161 @@ int mmc_switch_part(int dev_num, unsigned int part_num)
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;
+ 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;
+ }
+
+ 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;
+
+ /* 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;