2 * linux/include/linux/mmc/core.h
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.
8 #ifndef LINUX_MMC_CORE_H
9 #define LINUX_MMC_CORE_H
11 #include <linux/interrupt.h>
12 #include <linux/device.h>
22 unsigned int flags; /* expected response type */
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)
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.
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)
44 #define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
45 #define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
47 #define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))
50 * These are the command types.
52 #define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK)
54 unsigned int retries; /* max number of retries */
55 unsigned int error; /* command error */
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
64 struct mmc_data *data; /* data segment associated with cmd */
65 struct mmc_request *mrq; /* associated request */
69 unsigned int timeout_ns; /* data timeout (in ns, max 80ms) */
70 unsigned int timeout_clks; /* data timeout (in clocks) */
71 unsigned int blksz; /* data block size */
72 unsigned int blocks; /* number of blocks */
73 unsigned int error; /* data error */
76 #define MMC_DATA_WRITE (1 << 8)
77 #define MMC_DATA_READ (1 << 9)
78 #define MMC_DATA_STREAM (1 << 10)
79 #define MMC_DATA_MULTI (1 << 11)
81 unsigned int bytes_xfered;
83 struct mmc_command *stop; /* stop command */
84 struct mmc_request *mrq; /* associated request */
86 unsigned int sg_len; /* size of scatter list */
87 struct scatterlist *sg; /* I/O scatter list */
91 struct mmc_command *cmd;
92 struct mmc_data *data;
93 struct mmc_command *stop;
95 void *done_data; /* completion data */
96 void (*done)(struct mmc_request *);/* completion function */
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);
104 extern int mmc_wait_for_app_cmd(struct mmc_host *, struct mmc_card *,
105 struct mmc_command *, int);
107 extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *, int);
109 extern void mmc_claim_host(struct mmc_host *host);
110 extern void mmc_release_host(struct mmc_host *host);