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_NONE (0 << 0) 25 #define MMC_RSP_SHORT (1 << 0) 26 #define MMC_RSP_LONG (2 << 0) 27 #define MMC_RSP_MASK (3 << 0) 28 #define MMC_RSP_CRC (1 << 3) /* expect valid crc */ 29 #define MMC_RSP_BUSY (1 << 4) /* card may send busy */ 30 #define MMC_RSP_OPCODE (1 << 5) /* response contains opcode */ 31 32 /* 33 * These are the response types, and correspond to valid bit 34 * patterns of the above flags. One additional valid pattern 35 * is all zeros, which means we don't expect a response. 36 */ 37 #define MMC_RSP_R1 (MMC_RSP_SHORT|MMC_RSP_CRC|MMC_RSP_OPCODE) 38 #define MMC_RSP_R1B (MMC_RSP_SHORT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY) 39 #define MMC_RSP_R2 (MMC_RSP_LONG|MMC_RSP_CRC) 40 #define MMC_RSP_R3 (MMC_RSP_SHORT) 41 #define MMC_RSP_R6 (MMC_RSP_SHORT|MMC_RSP_CRC) 42 43 unsigned int retries; /* max number of retries */ 44 unsigned int error; /* command error */ 45 46 #define MMC_ERR_NONE 0 47 #define MMC_ERR_TIMEOUT 1 48 #define MMC_ERR_BADCRC 2 49 #define MMC_ERR_FIFO 3 50 #define MMC_ERR_FAILED 4 51 #define MMC_ERR_INVALID 5 52 53 struct mmc_data *data; /* data segment associated with cmd */ 54 struct mmc_request *mrq; /* associated request */ 55 }; 56 57 struct mmc_data { 58 unsigned int timeout_ns; /* data timeout (in ns, max 80ms) */ 59 unsigned int timeout_clks; /* data timeout (in clocks) */ 60 unsigned int blksz_bits; /* data block size */ 61 unsigned int blocks; /* number of blocks */ 62 unsigned int error; /* data error */ 63 unsigned int flags; 64 65 #define MMC_DATA_WRITE (1 << 8) 66 #define MMC_DATA_READ (1 << 9) 67 #define MMC_DATA_STREAM (1 << 10) 68 #define MMC_DATA_MULTI (1 << 11) 69 70 unsigned int bytes_xfered; 71 72 struct mmc_command *stop; /* stop command */ 73 struct mmc_request *mrq; /* associated request */ 74 75 unsigned int sg_len; /* size of scatter list */ 76 struct scatterlist *sg; /* I/O scatter list */ 77 }; 78 79 struct mmc_request { 80 struct mmc_command *cmd; 81 struct mmc_data *data; 82 struct mmc_command *stop; 83 84 void *done_data; /* completion data */ 85 void (*done)(struct mmc_request *);/* completion function */ 86 }; 87 88 struct mmc_host; 89 struct mmc_card; 90 91 extern int mmc_wait_for_req(struct mmc_host *, struct mmc_request *); 92 extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int); 93 extern int mmc_wait_for_app_cmd(struct mmc_host *, unsigned int, 94 struct mmc_command *, int); 95 96 extern int __mmc_claim_host(struct mmc_host *host, struct mmc_card *card); 97 98 static inline void mmc_claim_host(struct mmc_host *host) 99 { 100 __mmc_claim_host(host, (struct mmc_card *)-1); 101 } 102 103 extern void mmc_release_host(struct mmc_host *host); 104 105 #endif 106