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sdmmc: support SDIO over SPI

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This commit is contained in:
michael
2018-12-29 02:04:37 +08:00
committed by Michael (XIAO Xufeng)
parent 3ec7bec6a7
commit 8a364b4bdf
12 changed files with 350 additions and 163 deletions
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components/sdmmc/sdmmc_common.c
+40 -28
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@@ -66,40 +66,27 @@ esp_err_t sdmmc_init_ocr(sdmmc_card_t* card)
esp_err_t sdmmc_init_cid(sdmmc_card_t* card)
{
esp_err_t err;
sdmmc_csd_t csd;
sdmmc_response_t raw_cid;
if (!host_is_spi(card)) {
if (card->is_mem) {
err = sdmmc_send_cmd_all_send_cid(card, &raw_cid);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: all_send_cid returned 0x%x", __func__, err);
return err;
}
}
err = sdmmc_send_cmd_set_relative_addr(card, &card->rca);
err = sdmmc_send_cmd_all_send_cid(card, &raw_cid);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: set_relative_addr returned 0x%x", __func__, err);
ESP_LOGE(TAG, "%s: all_send_cid returned 0x%x", __func__, err);
return err;
}
if (card->is_mmc) {
/* For MMC, need to know CSD to decode CID.
* But CSD can only be read in data transfer mode,
* and it is not possible to read CID in data transfer mode.
* Luckily at this point the RCA is set and the card is in data
* transfer mode, so we can get its CSD to decode the CID...
*/
err = sdmmc_send_cmd_send_csd(card, &csd);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: send_csd returned 0x%x", __func__, err);
return err;
}
err = sdmmc_mmc_decode_cid(csd.mmc_ver, raw_cid, &card->cid);
} else {
if (!card->is_mmc) {
err = sdmmc_decode_cid(raw_cid, &card->cid);
}
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: decoding CID failed (0x%x)", __func__, err);
return err;
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: decoding CID failed (0x%x)", __func__, err);
return err;
}
} else {
/* For MMC, need to know CSD to decode CID. But CSD can only be read
* in data transfer mode, and it is not possible to read CID in data
* transfer mode. We temporiliy store the raw cid and do the
* decoding after the RCA is set and the card is in data transfer
* mode.
*/
memcpy(card->raw_cid, raw_cid, sizeof(sdmmc_response_t));
}
} else {
err = sdmmc_send_cmd_send_cid(card, &card->cid);
@@ -111,6 +98,30 @@ esp_err_t sdmmc_init_cid(sdmmc_card_t* card)
return ESP_OK;
}
esp_err_t sdmmc_init_rca(sdmmc_card_t* card)
{
esp_err_t err;
err = sdmmc_send_cmd_set_relative_addr(card, &card->rca);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: set_relative_addr returned 0x%x", __func__, err);
return err;
}
return ESP_OK;
}
esp_err_t sdmmc_init_mmc_decode_cid(sdmmc_card_t* card)
{
esp_err_t err;
sdmmc_response_t raw_cid;
memcpy(raw_cid, card->raw_cid, sizeof(raw_cid));
err = sdmmc_mmc_decode_cid(card->csd.mmc_ver, raw_cid, &card->cid);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: decoding CID failed (0x%x)", __func__, err);
return err;
}
return ESP_OK;
}
esp_err_t sdmmc_init_csd(sdmmc_card_t* card)
{
assert(card->is_mem == 1);
@@ -194,6 +205,7 @@ esp_err_t sdmmc_init_host_frequency(sdmmc_card_t* card)
SDMMC_FREQ_HIGHSPEED,
SDMMC_FREQ_26M,
SDMMC_FREQ_DEFAULT
//NOTE: in sdspi mode, 20MHz may not work. in that case, add 10MHz here.
};
const int n_freq_values = sizeof(freq_values) / sizeof(freq_values[0]);