alex/esp-idf
alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2024-09-20 10:46:02 -04:00
Code Issues Actions 3 Packages Projects Releases Wiki Activity
4681c59eeb
esp-idf/components/sdmmc/sdmmc_mmc.c
Ivan Grokhotkov 79659e3096
sdmmc: better calculation of erase timeout 
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.
2022-05-30 15:39:02 +02:00

301 lines
11 KiB
C
Raw Blame History

/*
* Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org>
* Adaptations to ESP-IDF Copyright (c) 2016-2018 Espressif Systems (Shanghai) PTE LTD
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <unistd.h>
#include "sdmmc_common.h"
static const char* TAG = "sdmmc_mmc";
esp_err_t sdmmc_init_mmc_read_ext_csd(sdmmc_card_t* card)
{
int card_type;
esp_err_t err = ESP_OK;
uint8_t* ext_csd = heap_caps_malloc(EXT_CSD_MMC_SIZE, MALLOC_CAP_DMA);
if (!ext_csd) {
ESP_LOGE(TAG, "%s: could not allocate ext_csd", __func__);
return ESP_ERR_NO_MEM;
}
uint32_t sectors = 0;
ESP_LOGD(TAG, "MMC version: %d", card->csd.mmc_ver);
if (card->csd.mmc_ver < MMC_CSD_MMCVER_4_0) {
err = ESP_ERR_NOT_SUPPORTED;
goto out;
}
/* read EXT_CSD */
err = sdmmc_mmc_send_ext_csd_data(card, ext_csd, EXT_CSD_MMC_SIZE);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: send_ext_csd_data error 0x%x", __func__, err);
goto out;
}
card_type = ext_csd[EXT_CSD_CARD_TYPE];
card->is_ddr = 0;
if (card_type & EXT_CSD_CARD_TYPE_F_52M_1_8V) {
card->max_freq_khz = SDMMC_FREQ_52M;
if ((card->host.flags & SDMMC_HOST_FLAG_DDR) &&
card->host.max_freq_khz >= SDMMC_FREQ_26M &&
card->host.get_bus_width(card->host.slot) == 4) {
ESP_LOGD(TAG, "card and host support DDR mode");
card->is_ddr = 1;
}
} else if (card_type & EXT_CSD_CARD_TYPE_F_52M) {
card->max_freq_khz = SDMMC_FREQ_52M;
} else if (card_type & EXT_CSD_CARD_TYPE_F_26M) {
card->max_freq_khz = SDMMC_FREQ_26M;
} else {
ESP_LOGW(TAG, "%s: unknown CARD_TYPE 0x%x", __func__, card_type);
}
/* For MMC cards, use speed value from EXT_CSD */
card->csd.tr_speed = card->max_freq_khz * 1000;
ESP_LOGD(TAG, "MMC card type %d, max_freq_khz=%d, is_ddr=%d", card_type, card->max_freq_khz, card->is_ddr);
card->max_freq_khz = MIN(card->max_freq_khz, card->host.max_freq_khz);
if (card->host.flags & SDMMC_HOST_FLAG_8BIT) {
card->ext_csd.power_class = ext_csd[(card->max_freq_khz > SDMMC_FREQ_26M) ?
EXT_CSD_PWR_CL_52_360 : EXT_CSD_PWR_CL_26_360] >> 4;
card->log_bus_width = 3;
} else if (card->host.flags & SDMMC_HOST_FLAG_4BIT) {
card->ext_csd.power_class = ext_csd[(card->max_freq_khz > SDMMC_FREQ_26M) ?
EXT_CSD_PWR_CL_52_360 : EXT_CSD_PWR_CL_26_360] & 0x0f;
card->log_bus_width = 2;
} else {
card->ext_csd.power_class = 0; //card must be able to do full rate at powerclass 0 in 1-bit mode
card->log_bus_width = 0;
}
sectors = ( ext_csd[EXT_CSD_SEC_COUNT + 0] << 0 )
| ( ext_csd[EXT_CSD_SEC_COUNT + 1] << 8 )
| ( ext_csd[EXT_CSD_SEC_COUNT + 2] << 16 )
| ( ext_csd[EXT_CSD_SEC_COUNT + 3] << 24 );
if (sectors > (2u * 1024 * 1024 * 1024) / 512) {
card->csd.capacity = sectors;
}
/* erased state of a bit, if 1 byte value read is 0xFF else 0x00 */
card->ext_csd.erase_mem_state = ext_csd[EXT_CSD_ERASED_MEM_CONT];
card->ext_csd.rev = ext_csd[EXT_CSD_REV];
card->ext_csd.sec_feature = ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
out:
free(ext_csd);
return err;
}
esp_err_t sdmmc_init_mmc_bus_width(sdmmc_card_t* card)
{
esp_err_t err;
if (card->ext_csd.power_class != 0) {
err = sdmmc_mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_POWER_CLASS, card->ext_csd.power_class);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: can't change power class (%d bit), 0x%x"
, __func__, card->ext_csd.power_class, err);
return err;
}
}
if (card->log_bus_width > 0) {
int csd_bus_width_value = EXT_CSD_BUS_WIDTH_1;
int bus_width = 1;
if (card->log_bus_width == 2) {
if (card->is_ddr) {
csd_bus_width_value = EXT_CSD_BUS_WIDTH_4_DDR;
} else {
csd_bus_width_value = EXT_CSD_BUS_WIDTH_4;
}
bus_width = 4;
} else if (card->log_bus_width == 3) {
if (card->is_ddr) {
csd_bus_width_value = EXT_CSD_BUS_WIDTH_8_DDR;
} else {
csd_bus_width_value = EXT_CSD_BUS_WIDTH_8;
}
bus_width = 8;
}
err = sdmmc_mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BUS_WIDTH, csd_bus_width_value);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: can't change bus width (%d bit), 0x%x",
__func__, bus_width, err);
return err;
}
}
return ESP_OK;
}
esp_err_t sdmmc_mmc_enable_hs_mode(sdmmc_card_t* card)
{
esp_err_t err;
if (card->max_freq_khz > SDMMC_FREQ_26M) {
/* switch to high speed timing */
err = sdmmc_mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_HS_TIMING, EXT_CSD_HS_TIMING_HS);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: mmc_switch EXT_CSD_HS_TIMING_HS error 0x%x",
__func__, err);
return err;
}
}
return ESP_OK;
}
esp_err_t sdmmc_mmc_decode_cid(int mmc_ver, sdmmc_response_t resp, sdmmc_cid_t* out_cid)
{
if (mmc_ver == MMC_CSD_MMCVER_1_0 ||
mmc_ver == MMC_CSD_MMCVER_1_4) {
out_cid->mfg_id = MMC_CID_MID_V1(resp);
out_cid->oem_id = 0;
MMC_CID_PNM_V1_CPY(resp, out_cid->name);
out_cid->revision = MMC_CID_REV_V1(resp);
out_cid->serial = MMC_CID_PSN_V1(resp);
out_cid->date = MMC_CID_MDT_V1(resp);
} else if (mmc_ver == MMC_CSD_MMCVER_2_0 ||
mmc_ver == MMC_CSD_MMCVER_3_1 ||
mmc_ver == MMC_CSD_MMCVER_4_0) {
out_cid->mfg_id = MMC_CID_MID_V2(resp);
out_cid->oem_id = MMC_CID_OID_V2(resp);
MMC_CID_PNM_V1_CPY(resp, out_cid->name);
out_cid->revision = 0;
out_cid->serial = MMC_CID_PSN_V1(resp);
out_cid->date = 0;
}
return ESP_OK;
}
esp_err_t sdmmc_mmc_decode_csd(sdmmc_response_t response, sdmmc_csd_t* out_csd)
{
out_csd->csd_ver = MMC_CSD_CSDVER(response);
if (out_csd->csd_ver == MMC_CSD_CSDVER_1_0 ||
out_csd->csd_ver == MMC_CSD_CSDVER_2_0 ||
out_csd->csd_ver == MMC_CSD_CSDVER_EXT_CSD) {
out_csd->mmc_ver = MMC_CSD_MMCVER(response);
out_csd->capacity = MMC_CSD_CAPACITY(response);
out_csd->read_block_len = MMC_CSD_READ_BL_LEN(response);
} else {
ESP_LOGE(TAG, "unknown MMC CSD structure version 0x%x\n", out_csd->csd_ver);
return 1;
}
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;
}
/* tr_speed will be determined when reading CXD */
out_csd->tr_speed = 0;
return ESP_OK;
}
esp_err_t sdmmc_mmc_send_ext_csd_data(sdmmc_card_t* card, void *out_data, size_t datalen)
{
assert(esp_ptr_dma_capable(out_data));
sdmmc_command_t cmd = {
.data = out_data,
.datalen = datalen,
.blklen = datalen,
.opcode = MMC_SEND_EXT_CSD,
.arg = 0,
.flags = SCF_CMD_ADTC | SCF_RSP_R1 | SCF_CMD_READ
};
return sdmmc_send_cmd(card, &cmd);
}
esp_err_t sdmmc_mmc_switch(sdmmc_card_t* card, uint8_t set, uint8_t index, uint8_t value)
{
sdmmc_command_t cmd = {
.opcode = MMC_SWITCH,
.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | (index << 16) | (value << 8) | set,
.flags = SCF_RSP_R1B | SCF_CMD_AC | SCF_WAIT_BUSY,
};
esp_err_t err = sdmmc_send_cmd(card, &cmd);
if (err == ESP_OK) {
//check response bit to see that switch was accepted
if (MMC_R1(cmd.response) & MMC_R1_SWITCH_ERROR) {
err = ESP_ERR_INVALID_RESPONSE;
}
}
return err;
}
esp_err_t sdmmc_init_mmc_check_ext_csd(sdmmc_card_t* card)
{
assert(card->is_mem == 1 && card->rca != 0);
/*
* Integrity check required if card switched to HS mode
* card->max_freq_khz = MIN(card->max_freq_khz, card->host.max_freq_khz)
* For 26MHz limit background see sdmmc_mmc_enable_hs_mode()
*/
if (card->max_freq_khz <= SDMMC_FREQ_26M) {
return ESP_OK;
}
/* ensure EXT_CSD buffer is available before starting any SD-card operation */
uint8_t* ext_csd = heap_caps_malloc(EXT_CSD_MMC_SIZE, MALLOC_CAP_DMA);
if (!ext_csd) {
ESP_LOGE(TAG, "%s: could not allocate ext_csd", __func__);
return ESP_ERR_NO_MEM;
}
/* ensure card is in transfer state before read ext_csd */
uint32_t status;
esp_err_t err = sdmmc_send_cmd_send_status(card, &status);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: send_status returned 0x%x", __func__, err);
goto out;
}
status = ((status & MMC_R1_CURRENT_STATE_MASK) >> MMC_R1_CURRENT_STATE_POS);
if (status != MMC_R1_CURRENT_STATE_TRAN) {
ESP_LOGE(TAG, "%s: card not in transfer state", __func__);
err = ESP_ERR_INVALID_STATE;
goto out;
}
/* read EXT_CSD to ensure device works fine in HS mode */
err = sdmmc_mmc_send_ext_csd_data(card, ext_csd, EXT_CSD_MMC_SIZE);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: send_ext_csd_data error 0x%x", __func__, err);
goto out;
}
/* EXT_CSD static fields should match the previous read values in sdmmc_card_init */
if ((card->ext_csd.rev != ext_csd[EXT_CSD_REV]) ||
(card->ext_csd.sec_feature != ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT])) {
ESP_LOGE(TAG, "%s: Data integrity test fail in HS mode", __func__);
err = ESP_FAIL;
}
out:
free(ext_csd);
return err;
}
uint32_t sdmmc_mmc_get_erase_timeout_ms(const sdmmc_card_t* card, int arg, size_t erase_size_kb)
{
/* TODO: calculate erase timeout based on ext_csd (trim_timeout) */
uint32_t timeout_ms = SDMMC_SD_DISCARD_TIMEOUT * erase_size_kb / card->csd.sector_size;
timeout_ms = MAX(1000, timeout_ms);
ESP_LOGD(TAG, "%s: erase timeout %u s (erasing %u kB, %ums per sector)",
__func__, timeout_ms / 1000, erase_size_kb, SDMMC_SD_DISCARD_TIMEOUT);
return timeout_ms;
}
Reference in New Issue View Git Blame Copy Permalink