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1da177e4 | 1 | /* |
aaac1b47 | 2 | * linux/include/linux/mmc/core.h |
1da177e4 LT |
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 | */ | |
aaac1b47 PO |
8 | #ifndef LINUX_MMC_CORE_H |
9 | #define LINUX_MMC_CORE_H | |
1da177e4 | 10 | |
1da177e4 LT |
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 */ | |
e9225176 RK |
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) | |
1da177e4 LT |
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 | */ | |
e9225176 RK |
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) | |
6f949909 | 44 | #define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) |
fba68bd2 | 45 | #define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE) |
e9225176 RK |
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 | */ | |
5bd546aa | 52 | #define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK) |
1da177e4 LT |
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 */ | |
8573b80f | 65 | struct mmc_request *mrq; /* associated request */ |
1da177e4 LT |
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) */ | |
2c171bf1 | 71 | unsigned int blksz; /* data block size */ |
1da177e4 LT |
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) | |
788ee7b0 | 79 | #define MMC_DATA_MULTI (1 << 11) |
1da177e4 LT |
80 | |
81 | unsigned int bytes_xfered; | |
82 | ||
83 | struct mmc_command *stop; /* stop command */ | |
8573b80f | 84 | struct mmc_request *mrq; /* associated request */ |
1da177e4 LT |
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); | |
da7fbe58 | 104 | extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *, |
335eadf2 | 105 | struct mmc_command *, int); |
1da177e4 | 106 | |
d773d725 RK |
107 | extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *, int); |
108 | ||
b855885e | 109 | extern void mmc_claim_host(struct mmc_host *host); |
1da177e4 LT |
110 | extern void mmc_release_host(struct mmc_host *host); |
111 | ||
112 | #endif |