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1da177e4 LT |
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 */ | |
e9225176 RK |
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) | |
1da177e4 LT |
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 | */ | |
e9225176 RK |
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_TYPE) | |
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) */ | |
71 | unsigned int blksz_bits; /* 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) | |
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); | |
335eadf2 PO |
104 | extern int mmc_wait_for_app_cmd(struct mmc_host *, unsigned int, |
105 | struct mmc_command *, int); | |
1da177e4 LT |
106 | |
107 | extern int __mmc_claim_host(struct mmc_host *host, struct mmc_card *card); | |
108 | ||
109 | static inline void mmc_claim_host(struct mmc_host *host) | |
110 | { | |
111 | __mmc_claim_host(host, (struct mmc_card *)-1); | |
112 | } | |
113 | ||
114 | extern void mmc_release_host(struct mmc_host *host); | |
115 | ||
116 | #endif |