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sdmmc: better calculation of erase timeout

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Previous version of the code used a fixed constant (500 ms) for the
erase timeout and added 1 ms for each sector erased.
This commit improves timeouts calculation:
- For SD cards, check if erase timeout information is present in the
  SSR register. If yes, use it for erase timeout calculation.
  Otherwise assume 250ms per erase block, same as Linux does.
- For eMMC assume 250ms per erase block (but no less than 1 second).
  This has to be improved later to use the erase timeout info in the
  extended CSD register.
This commit is contained in:
Ivan Grokhotkov
2022-05-30 15:37:40 +02:00
parent a28828a6f4
commit 79659e3096
7 changed files with 85 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files
components/sdmmc/sdmmc_common.h
+6 -1
View File
@@ -37,7 +37,9 @@
*/
#define SDMMC_DEFAULT_CMD_TIMEOUT_MS 1000 // Max timeout of ordinary commands
#define SDMMC_WRITE_CMD_TIMEOUT_MS 5000 // Max timeout of write commands
#define SDMMC_ERASE_BLOCK_TIMEOUT_MS 500 // Max timeout of erase per block
#define SDMMC_SD_DISCARD_TIMEOUT 250 // SD erase (discard) timeout
/* Maximum retry/error count for SEND_OP_COND (CMD1).
* These are somewhat arbitrary, values originate from OpenBSD driver.
@@ -79,6 +81,7 @@ esp_err_t sdmmc_write_sectors_dma(sdmmc_card_t* card, const void* src,
size_t start_block, size_t block_count);
esp_err_t sdmmc_read_sectors_dma(sdmmc_card_t* card, void* dst,
size_t start_block, size_t block_count);
uint32_t sdmmc_get_erase_timeout_ms(const sdmmc_card_t* card, int arg, size_t erase_size_kb);
/* SD specific */
esp_err_t sdmmc_check_scr(sdmmc_card_t* card);
@@ -86,6 +89,7 @@ esp_err_t sdmmc_decode_cid(sdmmc_response_t resp, sdmmc_cid_t* out_cid);
esp_err_t sdmmc_decode_csd(sdmmc_response_t response, sdmmc_csd_t* out_csd);
esp_err_t sdmmc_decode_scr(uint32_t *raw_scr, sdmmc_scr_t* out_scr);
esp_err_t sdmmc_decode_ssr(uint32_t *raw_ssr, sdmmc_ssr_t* out_ssr);
uint32_t sdmmc_sd_get_erase_timeout_ms(const sdmmc_card_t* card, int arg, size_t erase_size_kb);
/* SDIO specific */
esp_err_t sdmmc_io_reset(sdmmc_card_t* card);
@@ -103,6 +107,7 @@ esp_err_t sdmmc_mmc_switch(sdmmc_card_t* card, uint8_t set, uint8_t index, uint8
esp_err_t sdmmc_mmc_decode_cid(int mmc_ver, sdmmc_response_t resp, sdmmc_cid_t* out_cid);
esp_err_t sdmmc_mmc_decode_csd(sdmmc_response_t response, sdmmc_csd_t* out_csd);
esp_err_t sdmmc_mmc_enable_hs_mode(sdmmc_card_t* card);
uint32_t sdmmc_mmc_get_erase_timeout_ms(const sdmmc_card_t* card, int arg, size_t erase_size_kb);
/* Parts of card initialization flow */
esp_err_t sdmmc_init_sd_if_cond(sdmmc_card_t* card);