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https://github.com/espressif/esp-idf.git
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189 lines
7.8 KiB
C
189 lines
7.8 KiB
C
// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include "esp_err.h"
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#include "esp_log.h"
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#include "sys/lock.h"
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#include "driver/sdmmc_types.h"
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#include "driver/sdmmc_defs.h"
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#include "driver/sdmmc_types.h"
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#include "sdspi_private.h"
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#include "sdspi_crc.h"
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static const char* TAG = "sdspi_transaction";
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static _lock_t s_lock;
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static bool s_app_cmd;
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static uint8_t sdspi_msg_crc7(sdspi_hw_cmd_t* hw_cmd)
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{
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const size_t bytes_to_crc = offsetof(sdspi_hw_cmd_t, arguments) +
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sizeof(hw_cmd->arguments); /* can't take address of bit fields */
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return sdspi_crc7((const uint8_t *)hw_cmd, bytes_to_crc);
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}
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void make_hw_cmd(uint32_t opcode, uint32_t arg, int timeout_ms, sdspi_hw_cmd_t *hw_cmd)
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{
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hw_cmd->start_bit = 0;
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hw_cmd->transmission_bit = 1;
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hw_cmd->cmd_index = opcode;
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hw_cmd->stop_bit = 1;
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hw_cmd->r1 = 0xff;
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memset(hw_cmd->response, 0xff, sizeof(hw_cmd->response));
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hw_cmd->ncr = 0xff;
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uint32_t arg_s = __builtin_bswap32(arg);
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memcpy(hw_cmd->arguments, &arg_s, sizeof(arg_s));
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hw_cmd->crc7 = sdspi_msg_crc7(hw_cmd);
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hw_cmd->timeout_ms = timeout_ms;
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}
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static void r1_response_to_err(uint8_t r1, int cmd, esp_err_t *out_err)
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{
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if (r1 & SD_SPI_R1_NO_RESPONSE) {
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ESP_LOGD(TAG, "cmd=%d, R1 response not found", cmd);
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*out_err = ESP_ERR_TIMEOUT;
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} else if (r1 & SD_SPI_R1_CMD_CRC_ERR) {
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ESP_LOGD(TAG, "cmd=%d, R1 response: command CRC error", cmd);
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*out_err = ESP_ERR_INVALID_CRC;
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} else if (r1 & SD_SPI_R1_ILLEGAL_CMD) {
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ESP_LOGD(TAG, "cmd=%d, R1 response: command not supported", cmd);
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*out_err = ESP_ERR_NOT_SUPPORTED;
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} else if (r1 & SD_SPI_R1_ADDR_ERR) {
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ESP_LOGD(TAG, "cmd=%d, R1 response: alignment error", cmd);
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*out_err = ESP_ERR_INVALID_ARG;
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} else if (r1 & SD_SPI_R1_PARAM_ERR) {
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ESP_LOGD(TAG, "cmd=%d, R1 response: size error", cmd);
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*out_err = ESP_ERR_INVALID_SIZE;
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} else if ((r1 & SD_SPI_R1_ERASE_RST) ||
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(r1 & SD_SPI_R1_ERASE_SEQ_ERR)) {
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*out_err = ESP_ERR_INVALID_STATE;
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} else if (r1 & SD_SPI_R1_IDLE_STATE) {
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// Idle state is handled at command layer
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} else if (r1 != 0) {
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ESP_LOGD(TAG, "cmd=%d, R1 response: unexpected value 0x%02x", cmd, r1);
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*out_err = ESP_ERR_INVALID_RESPONSE;
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}
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}
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static void r1_sdio_response_to_err(uint8_t r1, int cmd, esp_err_t *out_err)
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{
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if (r1 & SD_SPI_R1_NO_RESPONSE) {
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ESP_LOGI(TAG, "cmd=%d, R1 response not found", cmd);
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*out_err = ESP_ERR_TIMEOUT;
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} else if (r1 & SD_SPI_R1_CMD_CRC_ERR) {
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ESP_LOGI(TAG, "cmd=%d, R1 response: command CRC error", cmd);
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*out_err = ESP_ERR_INVALID_CRC;
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} else if (r1 & SD_SPI_R1_ILLEGAL_CMD) {
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ESP_LOGI(TAG, "cmd=%d, R1 response: command not supported", cmd);
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*out_err = ESP_ERR_NOT_SUPPORTED;
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} else if (r1 & SD_SPI_R1_PARAM_ERR) {
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ESP_LOGI(TAG, "cmd=%d, R1 response: size error", cmd);
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*out_err = ESP_ERR_INVALID_SIZE;
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} else if (r1 & SDIO_R1_FUNC_NUM_ERR) {
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ESP_LOGI(TAG, "cmd=%d, R1 response: function number error", cmd);
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*out_err = ESP_ERR_INVALID_ARG;
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} else if (r1 & SD_SPI_R1_IDLE_STATE) {
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// Idle state is handled at command layer
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} else if (r1 != 0) {
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ESP_LOGI(TAG, "cmd=%d, R1 response: unexpected value 0x%02x", cmd, r1);
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*out_err = ESP_ERR_INVALID_RESPONSE;
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}
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}
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esp_err_t sdspi_host_do_transaction(int slot, sdmmc_command_t *cmdinfo)
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{
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_lock_acquire(&s_lock);
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// Convert the command to wire format
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WORD_ALIGNED_ATTR sdspi_hw_cmd_t hw_cmd;
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make_hw_cmd(cmdinfo->opcode, cmdinfo->arg, cmdinfo->timeout_ms, &hw_cmd);
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// Flags indicate which of the transfer types should be used
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int flags = 0;
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if (SCF_CMD(cmdinfo->flags) == SCF_CMD_ADTC) {
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flags = SDSPI_CMD_FLAG_DATA | SDSPI_CMD_FLAG_WRITE;
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} else if (SCF_CMD(cmdinfo->flags) == (SCF_CMD_ADTC | SCF_CMD_READ)) {
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flags = SDSPI_CMD_FLAG_DATA;
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}
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// The block size is 512, when larger than 512, the data must send in multi blocks
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if (cmdinfo->datalen > SDSPI_MAX_DATA_LEN) {
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flags |= SDSPI_CMD_FLAG_MULTI_BLK;
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}
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// In SD host, response format is encoded using SCF_RSP_* flags which come
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// as part of sdmmc_command_t from the upper layer (sdmmc_cmd.c).
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// SPI mode uses different command formats. In fact, most of the commands
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// use R1 response. Therefore, instead of adding another parallel set of
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// response flags for the SPI mode, response format is determined here:
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if (!s_app_cmd && cmdinfo->opcode == SD_SEND_IF_COND) {
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flags |= SDSPI_CMD_FLAG_RSP_R7;
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} else if (!s_app_cmd && cmdinfo->opcode == MMC_SEND_STATUS) {
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flags |= SDSPI_CMD_FLAG_RSP_R2;
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} else if (!s_app_cmd && cmdinfo->opcode == SD_READ_OCR) {
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flags |= SDSPI_CMD_FLAG_RSP_R3;
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} else if (s_app_cmd && cmdinfo->opcode == SD_APP_SD_STATUS) {
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flags |= SDSPI_CMD_FLAG_RSP_R2;
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} else if (!s_app_cmd && cmdinfo->opcode == MMC_GO_IDLE_STATE &&
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!(cmdinfo->flags & SCF_RSP_R1)) {
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/* used to send CMD0 without expecting a response */
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flags |= SDSPI_CMD_FLAG_NORSP;
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} else if (!s_app_cmd && cmdinfo->opcode == SD_IO_SEND_OP_COND) {
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flags |= SDSPI_CMD_FLAG_RSP_R4;
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} else if (!s_app_cmd && cmdinfo->opcode == SD_IO_RW_DIRECT) {
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flags |= SDSPI_CMD_FLAG_RSP_R5;
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} else if (!s_app_cmd && cmdinfo->opcode == SD_IO_RW_EXTENDED) {
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flags |= SDSPI_CMD_FLAG_RSP_R5 | SDSPI_CMD_FLAG_DATA;
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if (cmdinfo->arg & SD_ARG_CMD53_WRITE) flags |= SDSPI_CMD_FLAG_WRITE;
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// The CMD53 can assign block mode in the arg when the length is exactly 512 bytes
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if (cmdinfo->arg & SD_ARG_CMD53_BLOCK_MODE) flags |= SDSPI_CMD_FLAG_MULTI_BLK;
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} else {
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flags |= SDSPI_CMD_FLAG_RSP_R1;
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}
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// Send the command and get the response.
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esp_err_t ret = sdspi_host_start_command(slot, &hw_cmd,
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cmdinfo->data, cmdinfo->datalen, flags);
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// Extract response bytes and store them into cmdinfo structure
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if (ret == ESP_OK) {
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ESP_LOGV(TAG, "r1 = 0x%02x hw_cmd.r[0]=0x%08x", hw_cmd.r1, hw_cmd.response[0]);
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// Some errors should be reported using return code
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if (flags & SDSPI_CMD_FLAG_RSP_R1) {
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cmdinfo->response[0] = hw_cmd.r1;
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r1_response_to_err(hw_cmd.r1, cmdinfo->opcode, &ret);
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} else if (flags & SDSPI_CMD_FLAG_RSP_R2) {
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cmdinfo->response[0] = (((uint32_t)hw_cmd.r1) << 8) | (hw_cmd.response[0] >> 24);
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} else if (flags & (SDSPI_CMD_FLAG_RSP_R3 | SDSPI_CMD_FLAG_RSP_R7)) {
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r1_response_to_err(hw_cmd.r1, cmdinfo->opcode, &ret);
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cmdinfo->response[0] = __builtin_bswap32(hw_cmd.response[0]);
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} else if (flags & SDSPI_CMD_FLAG_RSP_R4) {
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r1_sdio_response_to_err(hw_cmd.r1, cmdinfo->opcode, &ret);
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cmdinfo->response[0] = __builtin_bswap32(hw_cmd.response[0]);
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} else if (flags & SDSPI_CMD_FLAG_RSP_R5) {
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r1_sdio_response_to_err(hw_cmd.r1, cmdinfo->opcode, &ret);
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cmdinfo->response[0] = hw_cmd.response[0];
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}
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}
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// Save a flag whether the next command is expected to be an app command
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if (ret == ESP_OK) {
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s_app_cmd = (cmdinfo->opcode == MMC_APP_CMD);
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} else {
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s_app_cmd = false;
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}
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_lock_release(&s_lock);
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return ret;
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}
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