/**
* Change transfer frequency for an MMC card
* @param mci MCI instance
* @return Transaction status (0 on success)
*/
static int mmc_change_freq(struct mci *mci)
{
char cardtype;
int err;
mci->ext_csd = xmalloc(512);
mci->card_caps = 0;
/* Only version 4 supports high-speed */
if (mci->version < MMC_VERSION_4)
return 0;
mci->card_caps |= MMC_MODE_4BIT;
err = mci_send_ext_csd(mci, mci->ext_csd);
if (err) {
dev_dbg(mci->mci_dev, "Preparing for frequency setup failed: %d\n", err);
return err;
}
cardtype = mci->ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK;
err = mci_switch(mci, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
if (err) {
dev_dbg(mci->mci_dev, "MMC frequency changing failed: %d\n", err);
return err;
}
/* Now check to see that it worked */
err = mci_send_ext_csd(mci, mci->ext_csd);
if (err) {
dev_dbg(mci->mci_dev, "Verifying frequency change failed: %d\n", err);
return err;
}
/* No high-speed support */
if (!mci->ext_csd[EXT_CSD_HS_TIMING]) {
dev_dbg(mci->mci_dev, "No high-speed support\n");
return 0;
}
/* High Speed is set, there are two types: 52MHz and 26MHz */
if (cardtype & EXT_CSD_CARD_TYPE_52)
mci->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
else
mci->card_caps |= MMC_MODE_HS;
return 0;
}
/**
* Change transfer frequency for an MMC card
* @param mci MCI instance
* @return Transaction status (0 on success)
*/
static int mmc_change_freq(struct mci *mci)
{
char cardtype;
int err;
mci->ext_csd = xmalloc(512);
mci->card_caps = 0;
/* Only version 4 supports high-speed */
if (mci->version < MMC_VERSION_4)
return 0;
mci->card_caps |= MMC_CAP_4_BIT_DATA;
err = mci_send_ext_csd(mci, mci->ext_csd);
if (err) {
dev_dbg(&mci->dev, "Preparing for frequency setup failed: %d\n", err);
return err;
}
cardtype = mci->ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK;
err = mci_switch(mci, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
if (err) {
dev_dbg(&mci->dev, "MMC frequency changing failed: %d\n", err);
return err;
}
/* Now check to see that it worked */
err = mci_send_ext_csd(mci, mci->ext_csd);
if (err) {
dev_dbg(&mci->dev, "Verifying frequency change failed: %d\n", err);
return err;
}
/* No high-speed support */
if (!mci->ext_csd[EXT_CSD_HS_TIMING]) {
dev_dbg(&mci->dev, "No high-speed support\n");
return 0;
}
/* High Speed is set, there are two types: 52MHz and 26MHz */
if (cardtype & EXT_CSD_CARD_TYPE_52)
mci->card_caps |= MMC_CAP_MMC_HIGHSPEED_52MHZ | MMC_CAP_MMC_HIGHSPEED;
else
mci->card_caps |= MMC_CAP_MMC_HIGHSPEED;
if (IS_ENABLED(CONFIG_MCI_MMC_BOOT_PARTITIONS) &&
mci->ext_csd[EXT_CSD_REV] >= 3 && mci->ext_csd[EXT_CSD_BOOT_MULT]) {
int idx;
unsigned int part_size;
for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
char *name, *partname;
part_size = mci->ext_csd[EXT_CSD_BOOT_MULT] << 17;
partname = asprintf("boot%d", idx);
name = asprintf("%s.%s", mci->cdevname, partname);
mci_part_add(mci, part_size,
EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
name, partname, idx, true,
MMC_BLK_DATA_AREA_BOOT);
}
mci->ext_csd_part_config = mci->ext_csd[EXT_CSD_PART_CONFIG];
mci->bootpart = (mci->ext_csd_part_config >> 3) & 0x7;
}
