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feat(sdmmc): add high speed mode switch validation check for SDIO

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This commit is contained in:
sonika.rathi
2024-05-31 09:14:36 +02:00
parent 9ac85e1d7b
commit 1af74c8a4a
3 changed files with 60 additions and 1 deletions
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components/sdmmc/sdmmc_io.c
+42
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@@ -120,6 +120,48 @@ esp_err_t sdmmc_init_io(sdmmc_card_t* card)
return ESP_OK;
}
esp_err_t sdmmc_io_init_read_card_cap(sdmmc_card_t* card, uint8_t *card_cap)
{
esp_err_t err = ESP_OK;
err = sdmmc_io_rw_direct(card, 0, SD_IO_CCCR_CARD_CAP,
SD_ARG_CMD52_READ, card_cap);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: sdmmc_io_rw_direct (read SD_IO_CCCR_CARD_CAP) returned 0x%0x", __func__, err);
return err;
}
return ESP_OK;
}
esp_err_t sdmmc_io_init_check_card_cap(sdmmc_card_t* card, uint8_t *card_cap)
{
esp_err_t err = ESP_OK;
/*
* Integrity check required if card is switched to HS mode
* For frequency less than SDMMC_FREQ_HIGHSPEED, see sdmmc_io_enable_hs_mode()
*/
if (card->max_freq_khz < SDMMC_FREQ_HIGHSPEED) {
return ESP_OK;
}
/* If frequency switch has been performed, read card capabilities from CCCR to confirm
* that data can be read correctly at the new frequency.
*/
uint8_t temp_card_cap = 0;
err = sdmmc_io_rw_direct(card, 0, SD_IO_CCCR_CARD_CAP,
SD_ARG_CMD52_READ, &temp_card_cap);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: sdmmc_io_rw_direct (read SD_IO_CCCR_CARD_CAP) returned 0x%0x", __func__, err);
return err;
}
if (*card_cap != temp_card_cap) {
ESP_LOGE(TAG, "%s: got corrupted data after increasing clock frequency", __func__);
return ESP_ERR_INVALID_RESPONSE;
}
return ESP_OK;
}
esp_err_t sdmmc_init_io_bus_width(sdmmc_card_t* card)
{
esp_err_t err;