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