1 /* 2 * linux/include/linux/mmc/core.h 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 #ifndef LINUX_MMC_CORE_H 9 #define LINUX_MMC_CORE_H 10 11 #include <linux/interrupt.h> 12 #include <linux/device.h> 13 14 struct request; 15 struct mmc_data; 16 struct mmc_request; 17 18 struct mmc_command { 19 u32 opcode; 20 u32 arg; 21 u32 resp[4]; 22 unsigned int flags; /* expected response type */ 23 #define MMC_RSP_PRESENT (1 << 0) 24 #define MMC_RSP_136 (1 << 1) /* 136 bit response */ 25 #define MMC_RSP_CRC (1 << 2) /* expect valid crc */ 26 #define MMC_RSP_BUSY (1 << 3) /* card may send busy */ 27 #define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */ 28 #define MMC_CMD_MASK (3 << 5) /* command type */ 29 #define MMC_CMD_AC (0 << 5) 30 #define MMC_CMD_ADTC (1 << 5) 31 #define MMC_CMD_BC (2 << 5) 32 #define MMC_CMD_BCR (3 << 5) 33 34 /* 35 * These are the response types, and correspond to valid bit 36 * patterns of the above flags. One additional valid pattern 37 * is all zeros, which means we don't expect a response. 38 */ 39 #define MMC_RSP_NONE (0) 40 #define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) 41 #define MMC_RSP_R1B (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY) 42 #define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC) 43 #define MMC_RSP_R3 (MMC_RSP_PRESENT) 44 #define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) 45 #define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) 46 47 #define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE)) 48 49 /* 50 * These are the command types. 51 */ 52 #define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK) 53 54 unsigned int retries; /* max number of retries */ 55 unsigned int error; /* command error */ 56 57 #define MMC_ERR_NONE 0 58 #define MMC_ERR_TIMEOUT 1 59 #define MMC_ERR_BADCRC 2 60 #define MMC_ERR_FIFO 3 61 #define MMC_ERR_FAILED 4 62 #define MMC_ERR_INVALID 5 63 64 struct mmc_data *data; /* data segment associated with cmd */ 65 struct mmc_request *mrq; /* associated request */ 66 }; 67 68 struct mmc_data { 69 unsigned int timeout_ns; /* data timeout (in ns, max 80ms) */ 70 unsigned int timeout_clks; /* data timeout (in clocks) */ 71 unsigned int blksz; /* data block size */ 72 unsigned int blocks; /* number of blocks */ 73 unsigned int error; /* data error */ 74 unsigned int flags; 75 76 #define MMC_DATA_WRITE (1 << 8) 77 #define MMC_DATA_READ (1 << 9) 78 #define MMC_DATA_STREAM (1 << 10) 79 #define MMC_DATA_MULTI (1 << 11) 80 81 unsigned int bytes_xfered; 82 83 struct mmc_command *stop; /* stop command */ 84 struct mmc_request *mrq; /* associated request */ 85 86 unsigned int sg_len; /* size of scatter list */ 87 struct scatterlist *sg; /* I/O scatter list */ 88 }; 89 90 struct mmc_request { 91 struct mmc_command *cmd; 92 struct mmc_data *data; 93 struct mmc_command *stop; 94 95 void *done_data; /* completion data */ 96 void (*done)(struct mmc_request *);/* completion function */ 97 }; 98 99 struct mmc_host; 100 struct mmc_card; 101 102 extern int mmc_wait_for_req(struct mmc_host *, struct mmc_request *); 103 extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int); 104 extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *, 105 struct mmc_command *, int); 106 107 extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *, int); 108 109 extern void mmc_claim_host(struct mmc_host *host); 110 extern void mmc_release_host(struct mmc_host *host); 111 112 #endif 113