184 lines
6.0 KiB
C
184 lines
6.0 KiB
C
/*
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* linux/include/linux/mmc/core.h
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef LINUX_MMC_CORE_H
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#define LINUX_MMC_CORE_H
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#include <linux/completion.h>
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#include <linux/types.h>
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struct mmc_data;
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struct mmc_request;
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enum mmc_blk_status {
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MMC_BLK_SUCCESS = 0,
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MMC_BLK_PARTIAL,
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MMC_BLK_CMD_ERR,
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MMC_BLK_RETRY,
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MMC_BLK_ABORT,
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MMC_BLK_DATA_ERR,
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MMC_BLK_ECC_ERR,
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MMC_BLK_NOMEDIUM,
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MMC_BLK_NEW_REQUEST,
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};
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struct mmc_command {
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u32 opcode;
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u32 arg;
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#define MMC_CMD23_ARG_REL_WR (1 << 31)
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#define MMC_CMD23_ARG_PACKED ((0 << 31) | (1 << 30))
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#define MMC_CMD23_ARG_TAG_REQ (1 << 29)
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u32 resp[4];
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unsigned int flags; /* expected response type */
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#define MMC_RSP_PRESENT (1 << 0)
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#define MMC_RSP_136 (1 << 1) /* 136 bit response */
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#define MMC_RSP_CRC (1 << 2) /* expect valid crc */
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#define MMC_RSP_BUSY (1 << 3) /* card may send busy */
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#define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */
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#define MMC_CMD_MASK (3 << 5) /* non-SPI command type */
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#define MMC_CMD_AC (0 << 5)
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#define MMC_CMD_ADTC (1 << 5)
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#define MMC_CMD_BC (2 << 5)
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#define MMC_CMD_BCR (3 << 5)
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#define MMC_RSP_SPI_S1 (1 << 7) /* one status byte */
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#define MMC_RSP_SPI_S2 (1 << 8) /* second byte */
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#define MMC_RSP_SPI_B4 (1 << 9) /* four data bytes */
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#define MMC_RSP_SPI_BUSY (1 << 10) /* card may send busy */
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/*
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* These are the native response types, and correspond to valid bit
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* patterns of the above flags. One additional valid pattern
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* is all zeros, which means we don't expect a response.
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*/
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#define MMC_RSP_NONE (0)
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#define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
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#define MMC_RSP_R1B (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
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#define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
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#define MMC_RSP_R3 (MMC_RSP_PRESENT)
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#define MMC_RSP_R4 (MMC_RSP_PRESENT)
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#define MMC_RSP_R5 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
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#define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
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#define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
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/* Can be used by core to poll after switch to MMC HS mode */
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#define MMC_RSP_R1_NO_CRC (MMC_RSP_PRESENT|MMC_RSP_OPCODE)
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#define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))
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/*
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* These are the SPI response types for MMC, SD, and SDIO cards.
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* Commands return R1, with maybe more info. Zero is an error type;
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* callers must always provide the appropriate MMC_RSP_SPI_Rx flags.
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*/
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#define MMC_RSP_SPI_R1 (MMC_RSP_SPI_S1)
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#define MMC_RSP_SPI_R1B (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY)
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#define MMC_RSP_SPI_R2 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
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#define MMC_RSP_SPI_R3 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
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#define MMC_RSP_SPI_R4 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
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#define MMC_RSP_SPI_R5 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2)
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#define MMC_RSP_SPI_R7 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4)
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#define mmc_spi_resp_type(cmd) ((cmd)->flags & \
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(MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY|MMC_RSP_SPI_S2|MMC_RSP_SPI_B4))
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/*
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* These are the command types.
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*/
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#define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK)
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unsigned int retries; /* max number of retries */
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int error; /* command error */
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/*
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* Standard errno values are used for errors, but some have specific
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* meaning in the MMC layer:
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*
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* ETIMEDOUT Card took too long to respond
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* EILSEQ Basic format problem with the received or sent data
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* (e.g. CRC check failed, incorrect opcode in response
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* or bad end bit)
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* EINVAL Request cannot be performed because of restrictions
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* in hardware and/or the driver
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* ENOMEDIUM Host can determine that the slot is empty and is
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* actively failing requests
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*/
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unsigned int busy_timeout; /* busy detect timeout in ms */
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/* Set this flag only for blocking sanitize request */
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bool sanitize_busy;
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struct mmc_data *data; /* data segment associated with cmd */
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struct mmc_request *mrq; /* associated request */
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};
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struct mmc_data {
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unsigned int timeout_ns; /* data timeout (in ns, max 80ms) */
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unsigned int timeout_clks; /* data timeout (in clocks) */
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unsigned int blksz; /* data block size */
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unsigned int blocks; /* number of blocks */
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unsigned int blk_addr; /* block address */
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int error; /* data error */
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unsigned int flags;
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#define MMC_DATA_WRITE BIT(8)
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#define MMC_DATA_READ BIT(9)
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/* Extra flags used by CQE */
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#define MMC_DATA_QBR BIT(10) /* CQE queue barrier*/
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#define MMC_DATA_PRIO BIT(11) /* CQE high priority */
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#define MMC_DATA_REL_WR BIT(12) /* Reliable write */
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#define MMC_DATA_DAT_TAG BIT(13) /* Tag request */
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#define MMC_DATA_FORCED_PRG BIT(14) /* Forced programming */
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unsigned int bytes_xfered;
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struct mmc_command *stop; /* stop command */
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struct mmc_request *mrq; /* associated request */
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unsigned int sg_len; /* size of scatter list */
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int sg_count; /* mapped sg entries */
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struct scatterlist *sg; /* I/O scatter list */
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s32 host_cookie; /* host private data */
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};
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struct mmc_host;
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struct mmc_request {
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struct mmc_command *sbc; /* SET_BLOCK_COUNT for multiblock */
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struct mmc_command *cmd;
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struct mmc_data *data;
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struct mmc_command *stop;
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struct completion completion;
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struct completion cmd_completion;
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void (*done)(struct mmc_request *);/* completion function */
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/*
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* Notify uppers layers (e.g. mmc block driver) that recovery is needed
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* due to an error associated with the mmc_request. Currently used only
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* by CQE.
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*/
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void (*recovery_notifier)(struct mmc_request *);
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struct mmc_host *host;
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/* Allow other commands during this ongoing data transfer or busy wait */
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bool cap_cmd_during_tfr;
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int tag;
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};
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struct mmc_card;
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void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq);
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int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd,
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int retries);
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int mmc_hw_reset(struct mmc_host *host);
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int mmc_sw_reset(struct mmc_host *host);
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void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card);
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#endif /* LINUX_MMC_CORE_H */
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