kopia lustrzana https://github.com/espressif/esp-idf
Merge branch 'bugfix/sdmmc_host_cclk_lp_v4.4' into 'release/v4.4'
sdmmc: keep clock enabled for the duration of ACMD41 (v4.4) See merge request espressif/esp-idf!24335pull/9151/merge
commit
7588771b52
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@ -40,6 +40,7 @@ extern "C" {
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.get_bus_width = &sdmmc_host_get_slot_width, \
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.set_bus_ddr_mode = &sdmmc_host_set_bus_ddr_mode, \
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.set_card_clk = &sdmmc_host_set_card_clk, \
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.set_cclk_always_on = &sdmmc_host_set_cclk_always_on, \
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.do_transaction = &sdmmc_host_do_transaction, \
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.deinit = &sdmmc_host_deinit, \
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.io_int_enable = sdmmc_host_io_int_enable, \
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@ -203,6 +204,19 @@ esp_err_t sdmmc_host_set_card_clk(int slot, uint32_t freq_khz);
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*/
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esp_err_t sdmmc_host_set_bus_ddr_mode(int slot, bool ddr_enabled);
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/**
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* @brief Enable or disable always-on card clock
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* When cclk_always_on is false, the host controller is allowed to shut down
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* the card clock between the commands. When cclk_always_on is true, the clock
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* is generated even if no command is in progress.
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* @param slot slot number
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* @param cclk_always_on enable or disable always-on clock
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* @return
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* - ESP_OK on success
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* - ESP_ERR_INVALID_ARG if the slot number is invalid
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*/
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esp_err_t sdmmc_host_set_cclk_always_on(int slot, bool cclk_always_on);
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/**
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* @brief Send command to the card and get response
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*
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@ -150,6 +150,7 @@ typedef struct {
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size_t (*get_bus_width)(int slot); /*!< host function to get bus width */
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esp_err_t (*set_bus_ddr_mode)(int slot, bool ddr_enable); /*!< host function to set DDR mode */
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esp_err_t (*set_card_clk)(int slot, uint32_t freq_khz); /*!< host function to set card clock frequency */
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esp_err_t (*set_cclk_always_on)(int slot, bool cclk_always_on); /*!< host function to set whether the clock is always enabled */
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esp_err_t (*do_transaction)(int slot, sdmmc_command_t* cmdinfo); /*!< host function to do a transaction */
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union {
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esp_err_t (*deinit)(void); /*!< host function to deinitialize the driver */
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@ -45,6 +45,7 @@ typedef int sdspi_dev_handle_t;
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.get_bus_width = NULL, \
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.set_bus_ddr_mode = NULL, \
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.set_card_clk = &sdspi_host_set_card_clk, \
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.set_cclk_always_on = NULL, \
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.do_transaction = &sdspi_host_do_transaction, \
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.deinit_p = &sdspi_host_remove_device, \
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.io_int_enable = &sdspi_host_io_int_enable, \
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@ -597,6 +597,20 @@ esp_err_t sdmmc_host_set_bus_ddr_mode(int slot, bool ddr_enabled)
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return ESP_OK;
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}
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esp_err_t sdmmc_host_set_cclk_always_on(int slot, bool cclk_always_on)
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{
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if (!(slot == 0 || slot == 1)) {
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return ESP_ERR_INVALID_ARG;
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}
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if (cclk_always_on) {
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SDMMC.clkena.cclk_low_power &= ~BIT(slot);
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} else {
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SDMMC.clkena.cclk_low_power |= BIT(slot);
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}
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sdmmc_host_clock_update_command(slot);
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return ESP_OK;
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}
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static void sdmmc_host_dma_init(void)
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{
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SDMMC.ctrl.dma_enable = 1;
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@ -107,6 +107,19 @@ esp_err_t sdmmc_send_cmd_send_op_cond(sdmmc_card_t* card, uint32_t ocr, uint32_t
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{
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esp_err_t err;
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/* If the host supports this, keep card clock enabled
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* from the start of ACMD41 until the card is idle.
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* (Ref. SD spec, section 4.4 "Clock control".)
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*/
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if (card->host.set_cclk_always_on != NULL) {
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err = card->host.set_cclk_always_on(card->host.slot, true);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: set_cclk_always_on (1) err=0x%x", __func__, err);
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return err;
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}
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ESP_LOGV(TAG, "%s: keeping clock on during ACMD41", __func__);
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}
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sdmmc_command_t cmd = {
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.arg = ocr,
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.flags = SCF_CMD_BCR | SCF_RSP_R3,
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@ -131,7 +144,7 @@ esp_err_t sdmmc_send_cmd_send_op_cond(sdmmc_card_t* card, uint32_t ocr, uint32_t
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if (err != ESP_OK) {
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if (--err_cnt == 0) {
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ESP_LOGD(TAG, "%s: sdmmc_send_app_cmd err=0x%x", __func__, err);
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return err;
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goto done;
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} else {
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ESP_LOGV(TAG, "%s: ignoring err=0x%x", __func__, err);
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continue;
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@ -151,13 +164,29 @@ esp_err_t sdmmc_send_cmd_send_op_cond(sdmmc_card_t* card, uint32_t ocr, uint32_t
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}
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vTaskDelay(10 / portTICK_PERIOD_MS);
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}
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if (nretries == 0) {
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return ESP_ERR_TIMEOUT;
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err = ESP_ERR_TIMEOUT;
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goto done;
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}
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if (ocrp) {
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*ocrp = MMC_R3(cmd.response);
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}
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return ESP_OK;
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err = ESP_OK;
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done:
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if (card->host.set_cclk_always_on != NULL) {
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esp_err_t err_cclk_dis = card->host.set_cclk_always_on(card->host.slot, false);
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if (err_cclk_dis != ESP_OK) {
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ESP_LOGE(TAG, "%s: set_cclk_always_on (2) err=0x%x", __func__, err);
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/* If we failed to disable clock, don't overwrite 'err' to return the original error */
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}
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ESP_LOGV(TAG, "%s: clock always-on mode disabled", __func__);
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}
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return err;
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}
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esp_err_t sdmmc_send_cmd_read_ocr(sdmmc_card_t *card, uint32_t *ocrp)
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