1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * linux/include/linux/mmc/core.h 4 */ 5 #ifndef LINUX_MMC_CORE_H 6 #define LINUX_MMC_CORE_H 7 8 #include <linux/completion.h> 9 #include <linux/types.h> 10 11 struct mmc_data; 12 struct mmc_request; 13 14 enum mmc_blk_status { 15 MMC_BLK_SUCCESS = 0, 16 MMC_BLK_PARTIAL, 17 MMC_BLK_CMD_ERR, 18 MMC_BLK_RETRY, 19 MMC_BLK_ABORT, 20 MMC_BLK_DATA_ERR, 21 MMC_BLK_ECC_ERR, 22 MMC_BLK_NOMEDIUM, 23 MMC_BLK_NEW_REQUEST, 24 }; 25 26 struct mmc_command { 27 u32 opcode; 28 u32 arg; 29 #define MMC_CMD23_ARG_REL_WR (1 << 31) 30 #define MMC_CMD23_ARG_PACKED ((0 << 31) | (1 << 30)) 31 #define MMC_CMD23_ARG_TAG_REQ (1 << 29) 32 u32 resp[4]; 33 unsigned int flags; /* expected response type */ 34 #define MMC_RSP_PRESENT (1 << 0) 35 #define MMC_RSP_136 (1 << 1) /* 136 bit response */ 36 #define MMC_RSP_CRC (1 << 2) /* expect valid crc */ 37 #define MMC_RSP_BUSY (1 << 3) /* card may send busy */ 38 #define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */ 39 40 #define MMC_CMD_MASK (3 << 5) /* non-SPI command type */ 41 #define MMC_CMD_AC (0 << 5) 42 #define MMC_CMD_ADTC (1 << 5) 43 #define MMC_CMD_BC (2 << 5) 44 #define MMC_CMD_BCR (3 << 5) 45 46 #define MMC_RSP_SPI_S1 (1 << 7) /* one status byte */ 47 #define MMC_RSP_SPI_S2 (1 << 8) /* second byte */ 48 #define MMC_RSP_SPI_B4 (1 << 9) /* four data bytes */ 49 #define MMC_RSP_SPI_BUSY (1 << 10) /* card may send busy */ 50 51 /* 52 * These are the native response types, and correspond to valid bit 53 * patterns of the above flags. One additional valid pattern 54 * is all zeros, which means we don't expect a response. 55 */ 56 #define MMC_RSP_NONE (0) 57 #define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) 58 #define MMC_RSP_R1B (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY) 59 #define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC) 60 #define MMC_RSP_R3 (MMC_RSP_PRESENT) 61 #define MMC_RSP_R4 (MMC_RSP_PRESENT) 62 #define MMC_RSP_R5 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) 63 #define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) 64 #define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) 65 66 /* Can be used by core to poll after switch to MMC HS mode */ 67 #define MMC_RSP_R1_NO_CRC (MMC_RSP_PRESENT|MMC_RSP_OPCODE) 68 69 #define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE)) 70 71 /* 72 * These are the SPI response types for MMC, SD, and SDIO cards. 73 * Commands return R1, with maybe more info. Zero is an error type; 74 * callers must always provide the appropriate MMC_RSP_SPI_Rx flags. 75 */ 76 #define MMC_RSP_SPI_R1 (MMC_RSP_SPI_S1) 77 #define MMC_RSP_SPI_R1B (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY) 78 #define MMC_RSP_SPI_R2 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2) 79 #define MMC_RSP_SPI_R3 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4) 80 #define MMC_RSP_SPI_R4 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4) 81 #define MMC_RSP_SPI_R5 (MMC_RSP_SPI_S1|MMC_RSP_SPI_S2) 82 #define MMC_RSP_SPI_R7 (MMC_RSP_SPI_S1|MMC_RSP_SPI_B4) 83 84 #define mmc_spi_resp_type(cmd) ((cmd)->flags & \ 85 (MMC_RSP_SPI_S1|MMC_RSP_SPI_BUSY|MMC_RSP_SPI_S2|MMC_RSP_SPI_B4)) 86 87 /* 88 * These are the command types. 89 */ 90 #define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK) 91 92 unsigned int retries; /* max number of retries */ 93 int error; /* command error */ 94 95 /* 96 * Standard errno values are used for errors, but some have specific 97 * meaning in the MMC layer: 98 * 99 * ETIMEDOUT Card took too long to respond 100 * EILSEQ Basic format problem with the received or sent data 101 * (e.g. CRC check failed, incorrect opcode in response 102 * or bad end bit) 103 * EINVAL Request cannot be performed because of restrictions 104 * in hardware and/or the driver 105 * ENOMEDIUM Host can determine that the slot is empty and is 106 * actively failing requests 107 */ 108 109 unsigned int busy_timeout; /* busy detect timeout in ms */ 110 /* Set this flag only for blocking sanitize request */ 111 bool sanitize_busy; 112 113 struct mmc_data *data; /* data segment associated with cmd */ 114 struct mmc_request *mrq; /* associated request */ 115 }; 116 117 struct mmc_data { 118 unsigned int timeout_ns; /* data timeout (in ns, max 80ms) */ 119 unsigned int timeout_clks; /* data timeout (in clocks) */ 120 unsigned int blksz; /* data block size */ 121 unsigned int blocks; /* number of blocks */ 122 unsigned int blk_addr; /* block address */ 123 int error; /* data error */ 124 unsigned int flags; 125 126 #define MMC_DATA_WRITE BIT(8) 127 #define MMC_DATA_READ BIT(9) 128 /* Extra flags used by CQE */ 129 #define MMC_DATA_QBR BIT(10) /* CQE queue barrier*/ 130 #define MMC_DATA_PRIO BIT(11) /* CQE high priority */ 131 #define MMC_DATA_REL_WR BIT(12) /* Reliable write */ 132 #define MMC_DATA_DAT_TAG BIT(13) /* Tag request */ 133 #define MMC_DATA_FORCED_PRG BIT(14) /* Forced programming */ 134 135 unsigned int bytes_xfered; 136 137 struct mmc_command *stop; /* stop command */ 138 struct mmc_request *mrq; /* associated request */ 139 140 unsigned int sg_len; /* size of scatter list */ 141 int sg_count; /* mapped sg entries */ 142 struct scatterlist *sg; /* I/O scatter list */ 143 s32 host_cookie; /* host private data */ 144 }; 145 146 struct mmc_host; 147 struct mmc_request { 148 struct mmc_command *sbc; /* SET_BLOCK_COUNT for multiblock */ 149 struct mmc_command *cmd; 150 struct mmc_data *data; 151 struct mmc_command *stop; 152 153 struct completion completion; 154 struct completion cmd_completion; 155 void (*done)(struct mmc_request *);/* completion function */ 156 /* 157 * Notify uppers layers (e.g. mmc block driver) that recovery is needed 158 * due to an error associated with the mmc_request. Currently used only 159 * by CQE. 160 */ 161 void (*recovery_notifier)(struct mmc_request *); 162 struct mmc_host *host; 163 164 /* Allow other commands during this ongoing data transfer or busy wait */ 165 bool cap_cmd_during_tfr; 166 167 int tag; 168 }; 169 170 struct mmc_card; 171 172 void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq); 173 int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, 174 int retries); 175 176 int mmc_hw_reset(struct mmc_host *host); 177 int mmc_sw_reset(struct mmc_host *host); 178 void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card); 179 180 #endif /* LINUX_MMC_CORE_H */ 181
