drivers/sdmmc: fix response type for CMD3

gschorcht · gschorcht · commit cb225385a766 · 2025-03-14T17:09:04.000+01:00
SD Card responses on CMD3 with R6 instead of R3 to publish its RCA. Bug found when migrating SDMMC for ESP32x to ESP-IDF v5.4.
diff --git a/drivers/sdmmc/sdmmc.c b/drivers/sdmmc/sdmmc.c
@@ -538,8 +538,8 @@ int sdmmc_card_init(sdmmc_dev_t *dev)
     }
     else {
         DEBUG("[sdmmc] send CMD3 to get RCA\n");
-        /* for SD cards, the card selects RCA and sends it back in R3 */
-        res = _send_cmd(dev, SDMMC_CMD3, SDMMC_CMD_NO_ARG, SDMMC_R3, response);
+        /* for SD cards, the card selects RCA and sends it back in R6 */
+        res = _send_cmd(dev, SDMMC_CMD3, SDMMC_CMD_NO_ARG, SDMMC_R6, response);
         dev->rca = response[0] >> 16;
     }
     if (res) {

Original file line number	Diff line number	Diff line change
`@@ -538,8 +538,8 @@ int sdmmc_card_init(sdmmc_dev_t *dev)`
`538`	`538`	`}`
`539`	`539`	`else {`
`540`	`540`	`DEBUG("[sdmmc] send CMD3 to get RCA\n");`
`541`		`- /* for SD cards, the card selects RCA and sends it back in R3 */`
`542`		`- res = _send_cmd(dev, SDMMC_CMD3, SDMMC_CMD_NO_ARG, SDMMC_R3, response);`
	`541`	`+ /* for SD cards, the card selects RCA and sends it back in R6 */`
	`542`	`+ res = _send_cmd(dev, SDMMC_CMD3, SDMMC_CMD_NO_ARG, SDMMC_R6, response);`
`543`	`543`	`dev->rca = response[0] >> 16;`
`544`	`544`	`}`
`545`	`545`	`if (res) {`