1 /* 2 * linux/include/linux/mmc/mmc.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 MMC_H 9 #define MMC_H 10 11 #include <linux/list.h> 12 #include <linux/interrupt.h> 13 #include <linux/device.h> 14 15 struct request; 16 struct mmc_data; 17 struct mmc_request; 18 19 struct mmc_command { 20 u32 opcode; 21 u32 arg; 22 u32 resp[4]; 23 unsigned int flags; /* expected response type */ 24 #define MMC_RSP_PRESENT (1 << 0) 25 #define MMC_RSP_136 (1 << 1) /* 136 bit response */ 26 #define MMC_RSP_CRC (1 << 2) /* expect valid crc */ 27 #define MMC_RSP_BUSY (1 << 3) /* card may send busy */ 28 #define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */ 29 #define MMC_CMD_MASK (3 << 5) /* command type */ 30 #define MMC_CMD_AC (0 << 5) 31 #define MMC_CMD_ADTC (1 << 5) 32 #define MMC_CMD_BC (2 << 5) 33 #define MMC_CMD_BCR (3 << 5) 34 35 /* 36 * These are the response types, and correspond to valid bit 37 * patterns of the above flags. One additional valid pattern 38 * is all zeros, which means we don't expect a response. 39 */ 40 #define MMC_RSP_NONE (0) 41 #define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) 42 #define MMC_RSP_R1B (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY) 43 #define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC) 44 #define MMC_RSP_R3 (MMC_RSP_PRESENT) 45 #define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC) 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_bits; /* data block size */ 72 unsigned int blksz; /* data block size */ 73 unsigned int blocks; /* number of blocks */ 74 unsigned int error; /* data error */ 75 unsigned int flags; 76 77 #define MMC_DATA_WRITE (1 << 8) 78 #define MMC_DATA_READ (1 << 9) 79 #define MMC_DATA_STREAM (1 << 10) 80 #define MMC_DATA_MULTI (1 << 11) 81 82 unsigned int bytes_xfered; 83 84 struct mmc_command *stop; /* stop command */ 85 struct mmc_request *mrq; /* associated request */ 86 87 unsigned int sg_len; /* size of scatter list */ 88 struct scatterlist *sg; /* I/O scatter list */ 89 }; 90 91 struct mmc_request { 92 struct mmc_command *cmd; 93 struct mmc_data *data; 94 struct mmc_command *stop; 95 96 void *done_data; /* completion data */ 97 void (*done)(struct mmc_request *);/* completion function */ 98 }; 99 100 struct mmc_host; 101 struct mmc_card; 102 103 extern int mmc_wait_for_req(struct mmc_host *, struct mmc_request *); 104 extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int); 105 extern int mmc_wait_for_app_cmd(struct mmc_host *, unsigned int, 106 struct mmc_command *, int); 107 108 extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *, int); 109 110 extern int __mmc_claim_host(struct mmc_host *host, struct mmc_card *card); 111 112 static inline void mmc_claim_host(struct mmc_host *host) 113 { 114 __mmc_claim_host(host, (struct mmc_card *)-1); 115 } 116 117 extern void mmc_release_host(struct mmc_host *host); 118 119 #endif 120
