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sdmmc: don't use high speed mode with SD over SPI

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Disabling due to limitation of SPI driver (max 26MHz for full-duplex
mode over GPIO matrix)
This commit is contained in:
Ivan Grokhotkov
2017-08-24 16:28:37 +08:00
parent 0420c4ec82
commit 631f552489
3 changed files with 8 additions and 3 deletions
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5
components/sdmmc/sdmmc_cmd.c
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@@ -233,7 +233,7 @@ esp_err_t sdmmc_card_init(const sdmmc_host_t* config, sdmmc_card_t* card)
/* Wait for the card to be ready for data transfers */
uint32_t status = 0;
while (!host_is_spi(card) && !(status & MMC_R1_READY_FOR_DATA)) {
while (!is_spi && !(status & MMC_R1_READY_FOR_DATA)) {
// TODO: add some timeout here
uint32_t count = 0;
err = sdmmc_send_cmd_send_status(card, &status);
@@ -249,7 +249,8 @@ esp_err_t sdmmc_card_init(const sdmmc_host_t* config, sdmmc_card_t* card)
* clock rate which both host and the card support, and switch to it.
*/
bool freq_switched = false;
if (config->max_freq_khz >= SDMMC_FREQ_HIGHSPEED) {
if (config->max_freq_khz >= SDMMC_FREQ_HIGHSPEED &&
!is_spi /* SPI doesn't support >26MHz in some cases */) {
/* This will determine if the card supports SWITCH_FUNC command,
* and high speed mode. If the cards supports both, this will enable
* high speed mode at the card side.