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132 lines
4.3 KiB
132 lines
4.3 KiB
/* |
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* Copyright (c) 2024 Espressif Systems (Shanghai) Co., Ltd. |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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*/ |
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#define SDMMC_FREQ_DEFAULT 20000 /*!< SD/MMC Default speed (limited by clock divider) */ |
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#define SDMMC_FREQ_HIGHSPEED 40000 /*!< SD High speed (limited by clock divider) */ |
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#define SDMMC_FREQ_PROBING 400 /*!< SD/MMC probing speed */ |
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#define SDMMC_FREQ_52M 52000 /*!< MMC 52MHz speed */ |
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#define SDMMC_FREQ_26M 26000 /*!< MMC 26MHz speed */ |
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#define SDMMC_DATA_ERR_MASK \ |
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(uint32_t)(SDMMC_INTMASK_DTO | SDMMC_INTMASK_DCRC | SDMMC_INTMASK_HTO | \ |
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SDMMC_INTMASK_SBE | SDMMC_INTMASK_EBE) |
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#define SDMMC_DMA_DONE_MASK \ |
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(uint32_t)(SDMMC_IDMAC_INTMASK_RI | SDMMC_IDMAC_INTMASK_TI | SDMMC_IDMAC_INTMASK_NI) |
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#define SDMMC_CMD_ERR_MASK \ |
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(uint32_t)(SDMMC_INTMASK_RTO | SDMMC_INTMASK_RCRC | SDMMC_INTMASK_RESP_ERR) |
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enum sdmmc_req_state { |
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SDMMC_IDLE, |
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SDMMC_SENDING_CMD, |
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SDMMC_SENDING_DATA, |
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SDMMC_BUSY, |
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}; |
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/* SDHC command flags */ |
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#define SCF_ITSDONE 0x0001 /*!< command is complete */ |
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#define SCF_CMD(flags) ((flags) & 0x00f0) |
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#define SCF_CMD_AC 0x0000 |
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#define SCF_CMD_ADTC 0x0010 |
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#define SCF_CMD_BC 0x0020 |
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#define SCF_CMD_BCR 0x0030 |
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#define SCF_CMD_READ 0x0040 /*!< read command (data expected) */ |
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#define SCF_RSP_BSY 0x0100 |
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#define SCF_RSP_136 0x0200 |
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#define SCF_RSP_CRC 0x0400 |
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#define SCF_RSP_IDX 0x0800 |
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#define SCF_RSP_PRESENT 0x1000 |
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/* response types */ |
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#define SCF_RSP_R0 0 /*!< none */ |
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#define SCF_RSP_R1 (SCF_RSP_PRESENT | SCF_RSP_CRC | SCF_RSP_IDX) |
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#define SCF_RSP_R1B (SCF_RSP_PRESENT | SCF_RSP_CRC | SCF_RSP_IDX | SCF_RSP_BSY) |
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#define SCF_RSP_R2 (SCF_RSP_PRESENT | SCF_RSP_CRC | SCF_RSP_136) |
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#define SCF_RSP_R3 (SCF_RSP_PRESENT) |
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#define SCF_RSP_R4 (SCF_RSP_PRESENT) |
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#define SCF_RSP_R5 (SCF_RSP_PRESENT | SCF_RSP_CRC | SCF_RSP_IDX) |
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#define SCF_RSP_R5B (SCF_RSP_PRESENT | SCF_RSP_CRC | SCF_RSP_IDX | SCF_RSP_BSY) |
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#define SCF_RSP_R6 (SCF_RSP_PRESENT | SCF_RSP_CRC | SCF_RSP_IDX) |
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#define SCF_RSP_R7 (SCF_RSP_PRESENT | SCF_RSP_CRC | SCF_RSP_IDX) |
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/* special flags */ |
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#define SCF_WAIT_BUSY 0x2000 /*!< Wait for completion of card busy signal before returning */ |
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#define SD_OCR_SDHC_CAP (1 << 30) |
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#define SD_OCR_VOL_MASK 0xFF8000 /* bits 23:15 */ |
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/* For debug only */ |
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static const char *const timingStr[] = {"UNKNOWN", "LEGACY", "HS", "SDR12", "SDR25", "SDR50", |
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"SDR104", "DDR50", "DDR52", "HS200", "HS400"}; |
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struct sdmmc_transfer_state { |
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uint8_t *ptr; |
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size_t size_remaining; |
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size_t next_desc; |
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size_t desc_remaining; |
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}; |
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struct sdmmc_event { |
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uint32_t header_DUMMY; /* Reserved for system use (Zephyr message queue) */ |
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uint32_t sdmmc_status; /* masked SDMMC interrupt status */ |
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uint32_t dma_status; /* masked DMA interrupt status */ |
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}; |
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/** |
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* Host contexts |
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*/ |
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struct host_ctx { |
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intr_handle_t intr_handle; |
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struct k_msgq *event_queue; |
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}; |
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/** |
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* SD/MMC command information |
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*/ |
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struct sdmmc_command { |
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uint32_t opcode; /*!< SD or MMC command index */ |
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uint32_t arg; /*!< SD/MMC command argument */ |
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uint32_t response[4]; /*!< response buffer */ |
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void *data; /*!< buffer to send or read into */ |
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size_t datalen; /*!< length of data in the buffer */ |
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size_t buflen; /*!< length of the buffer */ |
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size_t blklen; /*!< block length */ |
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int flags; /*!< see below */ |
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esp_err_t error; /*!< error returned from transfer */ |
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uint32_t timeout_ms; /*!< response timeout, in milliseconds */ |
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}; |
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/** |
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* @brief Convert ESP to Zephyr error codes |
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* |
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* @param ret_esp ESP return value |
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* |
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* @return Zephyr error code |
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*/ |
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static __attribute__((always_inline)) inline int err_esp2zep(int ret_esp) |
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{ |
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int ret; |
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switch (ret_esp) { |
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/* Treating the error codes most relevant to be individuated */ |
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case ESP_ERR_INVALID_ARG: |
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ret = -EINVAL; |
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break; |
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case ESP_ERR_TIMEOUT: |
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ret = -ETIMEDOUT; |
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break; |
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case ESP_ERR_NOT_FOUND: |
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ret = -ENODEV; /* SD card not inserted (requires CD signal) */ |
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break; |
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case ESP_ERR_INVALID_STATE: |
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ret = -EACCES; /* SD card write-protected (requires WP sinal) */ |
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break; |
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default: |
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ret = -EIO; |
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break; |
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} |
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return ret; |
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}
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