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1 #ifndef LINUX_MMC_IOCTL_H
2 #define LINUX_MMC_IOCTL_H
3 
4 #include <linux/types.h>
5 
6 struct mmc_ioc_cmd {
7 	/* Implies direction of data.  true = write, false = read */
8 	int write_flag;
9 
10 	/* Application-specific command.  true = precede with CMD55 */
11 	int is_acmd;
12 
13 	__u32 opcode;
14 	__u32 arg;
15 	__u32 response[4];  /* CMD response */
16 	unsigned int flags;
17 	unsigned int blksz;
18 	unsigned int blocks;
19 
20 	/*
21 	 * Sleep at least postsleep_min_us useconds, and at most
22 	 * postsleep_max_us useconds *after* issuing command.  Needed for
23 	 * some read commands for which cards have no other way of indicating
24 	 * they're ready for the next command (i.e. there is no equivalent of
25 	 * a "busy" indicator for read operations).
26 	 */
27 	unsigned int postsleep_min_us;
28 	unsigned int postsleep_max_us;
29 
30 	/*
31 	 * Override driver-computed timeouts.  Note the difference in units!
32 	 */
33 	unsigned int data_timeout_ns;
34 	unsigned int cmd_timeout_ms;
35 
36 	/*
37 	 * For 64-bit machines, the next member, ``__u64 data_ptr``, wants to
38 	 * be 8-byte aligned.  Make sure this struct is the same size when
39 	 * built for 32-bit.
40 	 */
41 	__u32 __pad;
42 
43 	/* DAT buffer */
44 	__u64 data_ptr;
45 };
46 #define mmc_ioc_cmd_set_data(ic, ptr) ic.data_ptr = (__u64)(unsigned long) ptr
47 
48 /**
49  * struct mmc_ioc_multi_cmd - multi command information
50  * @num_of_cmds: Number of commands to send. Must be equal to or less than
51  *	MMC_IOC_MAX_CMDS.
52  * @cmds: Array of commands with length equal to 'num_of_cmds'
53  */
54 struct mmc_ioc_multi_cmd {
55 	__u64 num_of_cmds;
56 	struct mmc_ioc_cmd cmds[0];
57 };
58 
59 #define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd)
60 /*
61  * MMC_IOC_MULTI_CMD: Used to send an array of MMC commands described by
62  *	the structure mmc_ioc_multi_cmd. The MMC driver will issue all
63  *	commands in array in sequence to card.
64  */
65 #define MMC_IOC_MULTI_CMD _IOWR(MMC_BLOCK_MAJOR, 1, struct mmc_ioc_multi_cmd)
66 /*
67  * Since this ioctl is only meant to enhance (and not replace) normal access
68  * to the mmc bus device, an upper data transfer limit of MMC_IOC_MAX_BYTES
69  * is enforced per ioctl call.  For larger data transfers, use the normal
70  * block device operations.
71  */
72 #define MMC_IOC_MAX_BYTES  (512L * 1024)
73 #define MMC_IOC_MAX_CMDS    255
74 #endif /* LINUX_MMC_IOCTL_H */
75