feat(st-sdmmc2): manage CMD6
For SD-cards, CMD6 is used to switch functions, like setting high speed
mode. As it has another meaning for eMMC, and may not work on standard
capacity SD-cards, it must be checked with MMC_IS_SD_HC flag.
As ACMD6 is also used, and will have the same index, a check on
CMD/ACMD commands is done: a boolean is stored depending on previous
command. It is set to true if CMD55 is issued, for other commands
it is set to false.
Change-Id: I6c2b9c7637656f858601ec075de1cb5f57af271a
Signed-off-by: Yann Gautier <yann.gautier@st.com>
diff --git a/drivers/st/mmc/stm32_sdmmc2.c b/drivers/st/mmc/stm32_sdmmc2.c
index 40641b5..dda981c 100644
--- a/drivers/st/mmc/stm32_sdmmc2.c
+++ b/drivers/st/mmc/stm32_sdmmc2.c
@@ -148,6 +148,8 @@
static struct stm32_sdmmc2_params sdmmc2_params;
+static bool next_cmd_is_acmd;
+
#pragma weak plat_sdmmc2_use_dma
bool plat_sdmmc2_use_dma(unsigned int instance, unsigned int memory)
{
@@ -257,6 +259,20 @@
case MMC_CMD(1):
arg_reg |= OCR_POWERUP;
break;
+ case MMC_CMD(6):
+ if ((sdmmc2_params.device_info->mmc_dev_type == MMC_IS_SD_HC) &&
+ (!next_cmd_is_acmd)) {
+ cmd_reg |= SDMMC_CMDR_CMDTRANS;
+ if (sdmmc2_params.use_dma) {
+ flags_data |= SDMMC_STAR_DCRCFAIL |
+ SDMMC_STAR_DTIMEOUT |
+ SDMMC_STAR_DATAEND |
+ SDMMC_STAR_RXOVERR |
+ SDMMC_STAR_IDMATE |
+ SDMMC_STAR_DBCKEND;
+ }
+ }
+ break;
case MMC_CMD(8):
if (sdmmc2_params.device_info->mmc_dev_type == MMC_IS_EMMC) {
cmd_reg |= SDMMC_CMDR_CMDTRANS;
@@ -294,6 +310,8 @@
break;
}
+ next_cmd_is_acmd = (cmd->cmd_idx == MMC_CMD(55));
+
mmio_write_32(base + SDMMC_ICR, SDMMC_STATIC_FLAGS);
/*
@@ -301,8 +319,7 @@
* Skip CMD55 as the next command could be data related, and
* the register could have been set in prepare function.
*/
- if (((cmd_reg & SDMMC_CMDR_CMDTRANS) == 0U) &&
- (cmd->cmd_idx != MMC_CMD(55))) {
+ if (((cmd_reg & SDMMC_CMDR_CMDTRANS) == 0U) && !next_cmd_is_acmd) {
mmio_write_32(base + SDMMC_DCTRLR, 0U);
}