703 lines
24 KiB
C
703 lines
24 KiB
C
/*
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* Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org>
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* Adaptations to ESP-IDF Copyright (c) 2016 Espressif Systems (Shanghai) PTE LTD
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <string.h>
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#include "esp_log.h"
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#include "esp_heap_caps.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "driver/sdmmc_defs.h"
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#include "driver/sdmmc_types.h"
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#include "sdmmc_cmd.h"
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#include "sys/param.h"
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#define SDMMC_GO_IDLE_DELAY_MS 20
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static const char* TAG = "sdmmc_cmd";
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static esp_err_t sdmmc_send_cmd(sdmmc_card_t* card, sdmmc_command_t* cmd);
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static esp_err_t sdmmc_send_app_cmd(sdmmc_card_t* card, sdmmc_command_t* cmd);
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static esp_err_t sdmmc_send_cmd_go_idle_state(sdmmc_card_t* card);
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static esp_err_t sdmmc_send_cmd_send_if_cond(sdmmc_card_t* card, uint32_t ocr);
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static esp_err_t sdmmc_send_cmd_send_op_cond(sdmmc_card_t* card, uint32_t ocr, uint32_t *ocrp);
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static esp_err_t sdmmc_send_cmd_read_ocr(sdmmc_card_t *card, uint32_t *ocrp);
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static esp_err_t sdmmc_send_cmd_send_cid(sdmmc_card_t *card, sdmmc_cid_t *out_cid);
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static esp_err_t sdmmc_decode_cid(sdmmc_response_t resp, sdmmc_cid_t* out_cid);
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static esp_err_t sddmc_send_cmd_all_send_cid(sdmmc_card_t* card, sdmmc_cid_t* out_cid);
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static esp_err_t sdmmc_send_cmd_set_relative_addr(sdmmc_card_t* card, uint16_t* out_rca);
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static esp_err_t sdmmc_send_cmd_set_blocklen(sdmmc_card_t* card, sdmmc_csd_t* csd);
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static esp_err_t sdmmc_decode_csd(sdmmc_response_t response, sdmmc_csd_t* out_csd);
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static esp_err_t sdmmc_send_cmd_send_csd(sdmmc_card_t* card, sdmmc_csd_t* out_csd);
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static esp_err_t sdmmc_send_cmd_select_card(sdmmc_card_t* card);
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static esp_err_t sdmmc_decode_scr(uint32_t *raw_scr, sdmmc_scr_t* out_scr);
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static esp_err_t sdmmc_send_cmd_send_scr(sdmmc_card_t* card, sdmmc_scr_t *out_scr);
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static esp_err_t sdmmc_send_cmd_set_bus_width(sdmmc_card_t* card, int width);
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static esp_err_t sdmmc_send_cmd_stop_transmission(sdmmc_card_t* card, uint32_t* status);
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static esp_err_t sdmmc_send_cmd_send_status(sdmmc_card_t* card, uint32_t* out_status);
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static esp_err_t sdmmc_send_cmd_crc_on_off(sdmmc_card_t* card, bool crc_enable);
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static uint32_t get_host_ocr(float voltage);
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static void response_ntoh(sdmmc_response_t response);
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static bool host_is_spi(const sdmmc_card_t* card)
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{
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return (card->host.flags & SDMMC_HOST_FLAG_SPI) != 0;
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}
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esp_err_t sdmmc_card_init(const sdmmc_host_t* config, sdmmc_card_t* card)
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{
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ESP_LOGD(TAG, "%s", __func__);
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memset(card, 0, sizeof(*card));
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memcpy(&card->host, config, sizeof(*config));
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const bool is_spi = host_is_spi(card);
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/* GO_IDLE_STATE (CMD0) command resets the card */
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esp_err_t err = sdmmc_send_cmd_go_idle_state(card);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: go_idle_state (1) returned 0x%x", __func__, err);
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return err;
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}
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vTaskDelay(SDMMC_GO_IDLE_DELAY_MS / portTICK_PERIOD_MS);
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sdmmc_send_cmd_go_idle_state(card);
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vTaskDelay(SDMMC_GO_IDLE_DELAY_MS / portTICK_PERIOD_MS);
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/* SEND_IF_COND (CMD8) command is used to identify SDHC/SDXC cards.
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* SD v1 and non-SD cards will not respond to this command.
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*/
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uint32_t host_ocr = get_host_ocr(config->io_voltage);
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err = sdmmc_send_cmd_send_if_cond(card, host_ocr);
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if (err == ESP_OK) {
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ESP_LOGD(TAG, "SDHC/SDXC card");
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host_ocr |= SD_OCR_SDHC_CAP;
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} else if (err == ESP_ERR_TIMEOUT) {
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ESP_LOGD(TAG, "CMD8 timeout; not an SDHC/SDXC card");
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} else {
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ESP_LOGE(TAG, "%s: send_if_cond (1) returned 0x%x", __func__, err);
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return err;
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}
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/* In SPI mode, READ_OCR (CMD58) command is used to figure out which voltage
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* ranges the card can support. This step is skipped since 1.8V isn't
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* supported on the ESP32.
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*/
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/* In SD mode, CRC checks of data transfers are mandatory and performed
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* by the hardware. In SPI mode, CRC16 of data transfers is optional and
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* needs to be enabled.
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*/
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if (is_spi) {
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err = sdmmc_send_cmd_crc_on_off(card, true);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: sdmmc_send_cmd_crc_on_off returned 0x%x", __func__, err);
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return err;
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}
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}
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/* Send SEND_OP_COND (ACMD41) command to the card until it becomes ready. */
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err = sdmmc_send_cmd_send_op_cond(card, host_ocr, &card->ocr);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: send_op_cond (1) returned 0x%x", __func__, err);
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return err;
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}
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if (is_spi) {
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err = sdmmc_send_cmd_read_ocr(card, &card->ocr);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: read_ocr returned 0x%x", __func__, err);
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return err;
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}
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}
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ESP_LOGD(TAG, "host_ocr=0x%x card_ocr=0x%x", host_ocr, card->ocr);
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/* Clear all voltage bits in host's OCR which the card doesn't support.
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* Don't touch CCS bit because in SPI mode cards don't report CCS in ACMD41
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* response.
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*/
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host_ocr &= (card->ocr | (~SD_OCR_VOL_MASK));
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ESP_LOGD(TAG, "sdmmc_card_init: host_ocr=%08x, card_ocr=%08x", host_ocr, card->ocr);
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if (!is_spi) {
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err = sddmc_send_cmd_all_send_cid(card, &card->cid);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: all_send_cid returned 0x%x", __func__, err);
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return err;
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}
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err = sdmmc_send_cmd_set_relative_addr(card, &card->rca);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: set_relative_addr returned 0x%x", __func__, err);
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return err;
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}
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} else {
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err = sdmmc_send_cmd_send_cid(card, &card->cid);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: send_cid returned 0x%x", __func__, err);
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return err;
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}
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}
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err = sdmmc_send_cmd_send_csd(card, &card->csd);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: send_csd returned 0x%x", __func__, err);
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return err;
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}
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const size_t max_sdsc_capacity = UINT32_MAX / card->csd.sector_size + 1;
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if (!(card->ocr & SD_OCR_SDHC_CAP) &&
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card->csd.capacity > max_sdsc_capacity) {
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ESP_LOGW(TAG, "%s: SDSC card reports capacity=%u. Limiting to %u.",
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__func__, card->csd.capacity, max_sdsc_capacity);
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card->csd.capacity = max_sdsc_capacity;
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}
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if (!is_spi) {
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err = sdmmc_send_cmd_select_card(card);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: select_card returned 0x%x", __func__, err);
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return err;
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}
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}
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if ((card->ocr & SD_OCR_SDHC_CAP) == 0) {
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err = sdmmc_send_cmd_set_blocklen(card, &card->csd);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: set_blocklen returned 0x%x", __func__, err);
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return err;
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}
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}
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err = sdmmc_send_cmd_send_scr(card, &card->scr);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: send_scr returned 0x%x", __func__, err);
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return err;
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}
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if ((config->flags & SDMMC_HOST_FLAG_4BIT) &&
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(card->scr.bus_width & SCR_SD_BUS_WIDTHS_4BIT)) {
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ESP_LOGD(TAG, "switching to 4-bit bus mode");
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err = sdmmc_send_cmd_set_bus_width(card, 4);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "set_bus_width failed");
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return err;
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}
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err = (*config->set_bus_width)(config->slot, 4);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "slot->set_bus_width failed");
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return err;
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}
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uint32_t status;
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err = sdmmc_send_cmd_stop_transmission(card, &status);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "stop_transmission failed (0x%x)", err);
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return err;
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}
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}
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uint32_t status = 0;
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while (!host_is_spi(card) && !(status & MMC_R1_READY_FOR_DATA)) {
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// TODO: add some timeout here
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uint32_t count = 0;
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err = sdmmc_send_cmd_send_status(card, &status);
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if (err != ESP_OK) {
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return err;
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}
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if (++count % 10 == 0) {
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ESP_LOGV(TAG, "waiting for card to become ready (%d)", count);
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}
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}
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if (config->max_freq_khz >= SDMMC_FREQ_HIGHSPEED &&
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card->csd.tr_speed / 1000 >= SDMMC_FREQ_HIGHSPEED) {
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ESP_LOGD(TAG, "switching to HS bus mode");
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err = (*config->set_card_clk)(config->slot, SDMMC_FREQ_HIGHSPEED);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "failed to switch peripheral to HS bus mode");
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return err;
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}
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} else if (config->max_freq_khz >= SDMMC_FREQ_DEFAULT &&
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card->csd.tr_speed / 1000 >= SDMMC_FREQ_DEFAULT) {
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ESP_LOGD(TAG, "switching to DS bus mode");
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err = (*config->set_card_clk)(config->slot, SDMMC_FREQ_DEFAULT);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "failed to switch peripheral to HS bus mode");
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return err;
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}
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}
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sdmmc_scr_t scr_tmp;
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err = sdmmc_send_cmd_send_scr(card, &scr_tmp);
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if (err != ESP_OK) {
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ESP_LOGE(TAG, "%s: send_scr returned 0x%x", __func__, err);
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return err;
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}
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if (memcmp(&card->scr, &scr_tmp, sizeof(scr_tmp)) != 0) {
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ESP_LOGE(TAG, "got corrupted data after increasing clock frequency");
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return ESP_ERR_INVALID_RESPONSE;
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}
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return ESP_OK;
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}
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void sdmmc_card_print_info(FILE* stream, const sdmmc_card_t* card)
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{
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fprintf(stream, "Name: %s\n", card->cid.name);
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fprintf(stream, "Type: %s\n", (card->ocr & SD_OCR_SDHC_CAP)?"SDHC/SDXC":"SDSC");
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fprintf(stream, "Speed: %s\n", (card->csd.tr_speed > 25000000)?"high speed":"default speed");
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fprintf(stream, "Size: %lluMB\n", ((uint64_t) card->csd.capacity) * card->csd.sector_size / (1024 * 1024));
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fprintf(stream, "CSD: ver=%d, sector_size=%d, capacity=%d read_bl_len=%d\n",
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card->csd.csd_ver,
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card->csd.sector_size, card->csd.capacity, card->csd.read_block_len);
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fprintf(stream, "SCR: sd_spec=%d, bus_width=%d\n", card->scr.sd_spec, card->scr.bus_width);
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}
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static esp_err_t sdmmc_send_cmd(sdmmc_card_t* card, sdmmc_command_t* cmd)
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{
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int slot = card->host.slot;
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ESP_LOGV(TAG, "sending cmd slot=%d op=%d arg=%x flags=%x data=%p blklen=%d datalen=%d",
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slot, cmd->opcode, cmd->arg, cmd->flags, cmd->data, cmd->blklen, cmd->datalen);
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esp_err_t err = (*card->host.do_transaction)(slot, cmd);
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if (err != 0) {
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ESP_LOGD(TAG, "sdmmc_req_run returned 0x%x", err);
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return err;
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}
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int state = MMC_R1_CURRENT_STATE(cmd->response);
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ESP_LOGV(TAG, "cmd response %08x %08x %08x %08x err=0x%x state=%d",
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cmd->response[0],
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cmd->response[1],
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cmd->response[2],
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cmd->response[3],
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cmd->error,
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state);
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return cmd->error;
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}
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static esp_err_t sdmmc_send_app_cmd(sdmmc_card_t* card, sdmmc_command_t* cmd)
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{
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sdmmc_command_t app_cmd = {
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.opcode = MMC_APP_CMD,
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.flags = SCF_CMD_AC | SCF_RSP_R1,
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.arg = MMC_ARG_RCA(card->rca),
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};
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esp_err_t err = sdmmc_send_cmd(card, &app_cmd);
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if (err != ESP_OK) {
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return err;
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}
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// Check APP_CMD status bit (only in SD mode)
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if (!host_is_spi(card) && !(MMC_R1(app_cmd.response) & MMC_R1_APP_CMD)) {
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ESP_LOGW(TAG, "card doesn't support APP_CMD");
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return ESP_ERR_NOT_SUPPORTED;
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}
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return sdmmc_send_cmd(card, cmd);
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}
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static esp_err_t sdmmc_send_cmd_go_idle_state(sdmmc_card_t* card)
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{
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sdmmc_command_t cmd = {
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.opcode = MMC_GO_IDLE_STATE,
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.flags = SCF_CMD_BC | SCF_RSP_R0,
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};
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return sdmmc_send_cmd(card, &cmd);
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}
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static esp_err_t sdmmc_send_cmd_send_if_cond(sdmmc_card_t* card, uint32_t ocr)
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{
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const uint8_t pattern = 0xaa; /* any pattern will do here */
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sdmmc_command_t cmd = {
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.opcode = SD_SEND_IF_COND,
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.arg = (((ocr & SD_OCR_VOL_MASK) != 0) << 8) | pattern,
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.flags = SCF_CMD_BCR | SCF_RSP_R7,
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};
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esp_err_t err = sdmmc_send_cmd(card, &cmd);
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if (err != ESP_OK) {
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return err;
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}
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uint8_t response = cmd.response[0] & 0xff;
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if (response != pattern) {
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ESP_LOGD(TAG, "%s: received=0x%x expected=0x%x", __func__, response, pattern);
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return ESP_ERR_INVALID_RESPONSE;
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}
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return ESP_OK;
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}
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static esp_err_t sdmmc_send_cmd_send_op_cond(sdmmc_card_t* card, uint32_t ocr, uint32_t *ocrp)
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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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.opcode = SD_APP_OP_COND
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};
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int nretries = 100; // arbitrary, BSD driver uses this value
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for (; nretries != 0; --nretries) {
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esp_err_t err = sdmmc_send_app_cmd(card, &cmd);
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if (err != ESP_OK) {
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return err;
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}
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// In SD protocol, card sets MEM_READY bit in OCR when it is ready.
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// In SPI protocol, card clears IDLE_STATE bit in R1 response.
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if (!host_is_spi(card)) {
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if ((MMC_R3(cmd.response) & MMC_OCR_MEM_READY) ||
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ocr == 0) {
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break;
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}
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} else {
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if ((SD_SPI_R1(cmd.response) & SD_SPI_R1_IDLE_STATE) == 0) {
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break;
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}
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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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}
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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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}
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static esp_err_t sdmmc_send_cmd_read_ocr(sdmmc_card_t *card, uint32_t *ocrp)
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{
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assert(ocrp);
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sdmmc_command_t cmd = {
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.opcode = SD_READ_OCR,
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.flags = SCF_CMD_BCR | SCF_RSP_R2
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};
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esp_err_t err = sdmmc_send_cmd(card, &cmd);
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if (err != ESP_OK) {
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return err;
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}
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*ocrp = SD_SPI_R3(cmd.response);
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return ESP_OK;
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}
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esp_err_t sdmmc_decode_cid(sdmmc_response_t resp, sdmmc_cid_t* out_cid)
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{
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out_cid->mfg_id = SD_CID_MID(resp);
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out_cid->oem_id = SD_CID_OID(resp);
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SD_CID_PNM_CPY(resp, out_cid->name);
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out_cid->revision = SD_CID_REV(resp);
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out_cid->serial = SD_CID_PSN(resp);
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out_cid->date = SD_CID_MDT(resp);
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return ESP_OK;
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}
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static esp_err_t sddmc_send_cmd_all_send_cid(sdmmc_card_t* card, sdmmc_cid_t* out_cid)
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{
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assert(out_cid);
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sdmmc_command_t cmd = {
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.opcode = MMC_ALL_SEND_CID,
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.flags = SCF_CMD_BCR | SCF_RSP_R2
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};
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esp_err_t err = sdmmc_send_cmd(card, &cmd);
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if (err != ESP_OK) {
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return err;
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}
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return sdmmc_decode_cid(cmd.response, out_cid);
|
|
}
|
|
|
|
static esp_err_t sdmmc_send_cmd_send_cid(sdmmc_card_t *card, sdmmc_cid_t *out_cid)
|
|
{
|
|
assert(out_cid);
|
|
assert(host_is_spi(card) && "SEND_CID should only be used in SPI mode");
|
|
sdmmc_response_t buf;
|
|
sdmmc_command_t cmd = {
|
|
.opcode = MMC_SEND_CID,
|
|
.flags = SCF_CMD_READ | SCF_CMD_ADTC,
|
|
.arg = 0,
|
|
.data = &buf[0],
|
|
.datalen = sizeof(buf)
|
|
};
|
|
esp_err_t err = sdmmc_send_cmd(card, &cmd);
|
|
if (err != ESP_OK) {
|
|
return err;
|
|
}
|
|
response_ntoh(buf);
|
|
return sdmmc_decode_cid(buf, out_cid);
|
|
}
|
|
|
|
|
|
static esp_err_t sdmmc_send_cmd_set_relative_addr(sdmmc_card_t* card, uint16_t* out_rca)
|
|
{
|
|
assert(out_rca);
|
|
sdmmc_command_t cmd = {
|
|
.opcode = SD_SEND_RELATIVE_ADDR,
|
|
.flags = SCF_CMD_BCR | SCF_RSP_R6
|
|
};
|
|
|
|
esp_err_t err = sdmmc_send_cmd(card, &cmd);
|
|
if (err != ESP_OK) {
|
|
return err;
|
|
}
|
|
*out_rca = SD_R6_RCA(cmd.response);
|
|
return ESP_OK;
|
|
}
|
|
|
|
|
|
static esp_err_t sdmmc_send_cmd_set_blocklen(sdmmc_card_t* card, sdmmc_csd_t* csd)
|
|
{
|
|
sdmmc_command_t cmd = {
|
|
.opcode = MMC_SET_BLOCKLEN,
|
|
.arg = csd->sector_size,
|
|
.flags = SCF_CMD_AC | SCF_RSP_R1
|
|
};
|
|
return sdmmc_send_cmd(card, &cmd);
|
|
}
|
|
|
|
static esp_err_t sdmmc_decode_csd(sdmmc_response_t response, sdmmc_csd_t* out_csd)
|
|
{
|
|
out_csd->csd_ver = SD_CSD_CSDVER(response);
|
|
switch (out_csd->csd_ver) {
|
|
case SD_CSD_CSDVER_2_0:
|
|
out_csd->capacity = SD_CSD_V2_CAPACITY(response);
|
|
out_csd->read_block_len = SD_CSD_V2_BL_LEN;
|
|
break;
|
|
case SD_CSD_CSDVER_1_0:
|
|
out_csd->capacity = SD_CSD_CAPACITY(response);
|
|
out_csd->read_block_len = SD_CSD_READ_BL_LEN(response);
|
|
break;
|
|
default:
|
|
ESP_LOGE(TAG, "unknown SD CSD structure version 0x%x", out_csd->csd_ver);
|
|
return ESP_ERR_NOT_SUPPORTED;
|
|
}
|
|
out_csd->card_command_class = SD_CSD_CCC(response);
|
|
int read_bl_size = 1 << out_csd->read_block_len;
|
|
out_csd->sector_size = MIN(read_bl_size, 512);
|
|
if (out_csd->sector_size < read_bl_size) {
|
|
out_csd->capacity *= read_bl_size / out_csd->sector_size;
|
|
}
|
|
int speed = SD_CSD_SPEED(response);
|
|
if (speed == SD_CSD_SPEED_50_MHZ) {
|
|
out_csd->tr_speed = 50000000;
|
|
} else {
|
|
out_csd->tr_speed = 25000000;
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t sdmmc_send_cmd_send_csd(sdmmc_card_t* card, sdmmc_csd_t* out_csd)
|
|
{
|
|
/* The trick with SEND_CSD is that in SPI mode, it acts as a data read
|
|
* command, while in SD mode it is an AC command with R2 response.
|
|
*/
|
|
sdmmc_response_t spi_buf;
|
|
const bool is_spi = host_is_spi(card);
|
|
sdmmc_command_t cmd = {
|
|
.opcode = MMC_SEND_CSD,
|
|
.arg = is_spi ? 0 : MMC_ARG_RCA(card->rca),
|
|
.flags = is_spi ? (SCF_CMD_READ | SCF_CMD_ADTC | SCF_RSP_R1) :
|
|
(SCF_CMD_AC | SCF_RSP_R2),
|
|
.data = is_spi ? &spi_buf[0] : 0,
|
|
.datalen = is_spi ? sizeof(spi_buf) : 0,
|
|
};
|
|
esp_err_t err = sdmmc_send_cmd(card, &cmd);
|
|
if (err != ESP_OK) {
|
|
return err;
|
|
}
|
|
if (is_spi) {
|
|
response_ntoh(spi_buf);
|
|
}
|
|
return sdmmc_decode_csd(is_spi ? spi_buf : cmd.response, out_csd);
|
|
}
|
|
|
|
static esp_err_t sdmmc_send_cmd_select_card(sdmmc_card_t* card)
|
|
{
|
|
sdmmc_command_t cmd = {
|
|
.opcode = MMC_SELECT_CARD,
|
|
.arg = MMC_ARG_RCA(card->rca),
|
|
.flags = SCF_CMD_AC | SCF_RSP_R1
|
|
};
|
|
return sdmmc_send_cmd(card, &cmd);
|
|
}
|
|
|
|
static esp_err_t sdmmc_decode_scr(uint32_t *raw_scr, sdmmc_scr_t* out_scr)
|
|
{
|
|
sdmmc_response_t resp = {0xabababab, 0xabababab, 0x12345678, 0x09abcdef};
|
|
resp[2] = __builtin_bswap32(raw_scr[0]);
|
|
resp[3] = __builtin_bswap32(raw_scr[1]);
|
|
int ver = SCR_STRUCTURE(resp);
|
|
if (ver != 0) {
|
|
return ESP_ERR_NOT_SUPPORTED;
|
|
}
|
|
out_scr->sd_spec = SCR_SD_SPEC(resp);
|
|
out_scr->bus_width = SCR_SD_BUS_WIDTHS(resp);
|
|
return ESP_OK;
|
|
}
|
|
|
|
static esp_err_t sdmmc_send_cmd_send_scr(sdmmc_card_t* card, sdmmc_scr_t *out_scr)
|
|
{
|
|
size_t datalen = 8;
|
|
uint32_t* buf = (uint32_t*) heap_caps_malloc(datalen, MALLOC_CAP_DMA);
|
|
if (buf == NULL) {
|
|
return ESP_ERR_NO_MEM;
|
|
}
|
|
sdmmc_command_t cmd = {
|
|
.data = buf,
|
|
.datalen = datalen,
|
|
.blklen = datalen,
|
|
.flags = SCF_CMD_ADTC | SCF_CMD_READ | SCF_RSP_R1,
|
|
.opcode = SD_APP_SEND_SCR
|
|
};
|
|
esp_err_t err = sdmmc_send_app_cmd(card, &cmd);
|
|
if (err == ESP_OK) {
|
|
err = sdmmc_decode_scr(buf, out_scr);
|
|
}
|
|
free(buf);
|
|
return err;
|
|
}
|
|
|
|
static esp_err_t sdmmc_send_cmd_set_bus_width(sdmmc_card_t* card, int width)
|
|
{
|
|
sdmmc_command_t cmd = {
|
|
.opcode = SD_APP_SET_BUS_WIDTH,
|
|
.flags = SCF_RSP_R1 | SCF_CMD_AC,
|
|
.arg = (width == 4) ? SD_ARG_BUS_WIDTH_4 : SD_ARG_BUS_WIDTH_1
|
|
};
|
|
|
|
return sdmmc_send_app_cmd(card, &cmd);
|
|
}
|
|
|
|
static esp_err_t sdmmc_send_cmd_stop_transmission(sdmmc_card_t* card, uint32_t* status)
|
|
{
|
|
sdmmc_command_t cmd = {
|
|
.opcode = MMC_STOP_TRANSMISSION,
|
|
.arg = 0,
|
|
.flags = SCF_RSP_R1B | SCF_CMD_AC
|
|
};
|
|
esp_err_t err = sdmmc_send_cmd(card, &cmd);
|
|
if (err == 0) {
|
|
*status = MMC_R1(cmd.response);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static esp_err_t sdmmc_send_cmd_crc_on_off(sdmmc_card_t* card, bool crc_enable)
|
|
{
|
|
assert(host_is_spi(card) && "CRC_ON_OFF can only be used in SPI mode");
|
|
sdmmc_command_t cmd = {
|
|
.opcode = SD_CRC_ON_OFF,
|
|
.arg = crc_enable ? 1 : 0,
|
|
.flags = SCF_CMD_AC | SCF_RSP_R1
|
|
};
|
|
return sdmmc_send_cmd(card, &cmd);
|
|
}
|
|
|
|
static uint32_t get_host_ocr(float voltage)
|
|
{
|
|
// TODO: report exact voltage to the card
|
|
// For now tell that the host has 2.8-3.6V voltage range
|
|
(void) voltage;
|
|
return SD_OCR_VOL_MASK;
|
|
}
|
|
|
|
static void response_ntoh(sdmmc_response_t response)
|
|
{
|
|
for (int i = 0; i < 4; ++i) {
|
|
response[i] = __builtin_bswap32(response[i]);
|
|
}
|
|
}
|
|
|
|
static esp_err_t sdmmc_send_cmd_send_status(sdmmc_card_t* card, uint32_t* out_status)
|
|
{
|
|
sdmmc_command_t cmd = {
|
|
.opcode = MMC_SEND_STATUS,
|
|
.arg = MMC_ARG_RCA(card->rca),
|
|
.flags = SCF_CMD_AC | SCF_RSP_R1
|
|
};
|
|
esp_err_t err = sdmmc_send_cmd(card, &cmd);
|
|
if (err != ESP_OK) {
|
|
return err;
|
|
}
|
|
if (out_status) {
|
|
*out_status = MMC_R1(cmd.response);
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t sdmmc_write_sectors(sdmmc_card_t* card, const void* src,
|
|
size_t start_block, size_t block_count)
|
|
{
|
|
if (start_block + block_count > card->csd.capacity) {
|
|
return ESP_ERR_INVALID_SIZE;
|
|
}
|
|
size_t block_size = card->csd.sector_size;
|
|
sdmmc_command_t cmd = {
|
|
.flags = SCF_CMD_ADTC | SCF_RSP_R1,
|
|
.blklen = block_size,
|
|
.data = (void*) src,
|
|
.datalen = block_count * block_size
|
|
};
|
|
if (block_count == 1) {
|
|
cmd.opcode = MMC_WRITE_BLOCK_SINGLE;
|
|
} else {
|
|
cmd.opcode = MMC_WRITE_BLOCK_MULTIPLE;
|
|
}
|
|
if (card->ocr & SD_OCR_SDHC_CAP) {
|
|
cmd.arg = start_block;
|
|
} else {
|
|
cmd.arg = start_block * block_size;
|
|
}
|
|
esp_err_t err = sdmmc_send_cmd(card, &cmd);
|
|
if (err != ESP_OK) {
|
|
ESP_LOGE(TAG, "%s: sdmmc_send_cmd returned 0x%x", __func__, err);
|
|
return err;
|
|
}
|
|
uint32_t status = 0;
|
|
size_t count = 0;
|
|
while (!host_is_spi(card) && !(status & MMC_R1_READY_FOR_DATA)) {
|
|
// TODO: add some timeout here
|
|
err = sdmmc_send_cmd_send_status(card, &status);
|
|
if (err != ESP_OK) {
|
|
return err;
|
|
}
|
|
if (++count % 10 == 0) {
|
|
ESP_LOGV(TAG, "waiting for card to become ready (%d)", count);
|
|
}
|
|
}
|
|
return ESP_OK;
|
|
}
|
|
|
|
esp_err_t sdmmc_read_sectors(sdmmc_card_t* card, void* dst,
|
|
size_t start_block, size_t block_count)
|
|
{
|
|
if (start_block + block_count > card->csd.capacity) {
|
|
return ESP_ERR_INVALID_SIZE;
|
|
}
|
|
size_t block_size = card->csd.sector_size;
|
|
sdmmc_command_t cmd = {
|
|
.flags = SCF_CMD_ADTC | SCF_CMD_READ | SCF_RSP_R1,
|
|
.blklen = block_size,
|
|
.data = (void*) dst,
|
|
.datalen = block_count * block_size
|
|
};
|
|
if (block_count == 1) {
|
|
cmd.opcode = MMC_READ_BLOCK_SINGLE;
|
|
} else {
|
|
cmd.opcode = MMC_READ_BLOCK_MULTIPLE;
|
|
}
|
|
if (card->ocr & SD_OCR_SDHC_CAP) {
|
|
cmd.arg = start_block;
|
|
} else {
|
|
cmd.arg = start_block * block_size;
|
|
}
|
|
esp_err_t err = sdmmc_send_cmd(card, &cmd);
|
|
if (err != ESP_OK) {
|
|
ESP_LOGE(TAG, "%s: sdmmc_send_cmd returned 0x%x", __func__, err);
|
|
return err;
|
|
}
|
|
uint32_t status = 0;
|
|
size_t count = 0;
|
|
while (!host_is_spi(card) && !(status & MMC_R1_READY_FOR_DATA)) {
|
|
// TODO: add some timeout here
|
|
err = sdmmc_send_cmd_send_status(card, &status);
|
|
if (err != ESP_OK) {
|
|
return err;
|
|
}
|
|
if (++count % 10 == 0) {
|
|
ESP_LOGV(TAG, "waiting for card to become ready (%d)", count);
|
|
}
|
|
}
|
|
return ESP_OK;
|
|
}
|