1#ifndef LINUX_MMC_IOCTL_H
2#define LINUX_MMC_IOCTL_H
3struct mmc_ioc_cmd {
4	/* Implies direction of data.  true = write, false = read */
5	int write_flag;
6
7	/* Application-specific command.  true = precede with CMD55 */
8	int is_acmd;
9
10	__u32 opcode;
11	__u32 arg;
12	__u32 response[4];  /* CMD response */
13	unsigned int flags;
14	unsigned int blksz;
15	unsigned int blocks;
16
17	/*
18	 * Sleep at least postsleep_min_us useconds, and at most
19	 * postsleep_max_us useconds *after* issuing command.  Needed for
20	 * some read commands for which cards have no other way of indicating
21	 * they're ready for the next command (i.e. there is no equivalent of
22	 * a "busy" indicator for read operations).
23	 */
24	unsigned int postsleep_min_us;
25	unsigned int postsleep_max_us;
26
27	/*
28	 * Override driver-computed timeouts.  Note the difference in units!
29	 */
30	unsigned int data_timeout_ns;
31	unsigned int cmd_timeout_ms;
32
33	/*
34	 * For 64-bit machines, the next member, ``__u64 data_ptr``, wants to
35	 * be 8-byte aligned.  Make sure this struct is the same size when
36	 * built for 32-bit.
37	 */
38	__u32 __pad;
39
40	/* DAT buffer */
41	__u64 data_ptr;
42};
43#define mmc_ioc_cmd_set_data(ic, ptr) ic.data_ptr = (__u64)(unsigned long) ptr
44
45#define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd)
46
47/*
48 * Since this ioctl is only meant to enhance (and not replace) normal access
49 * to the mmc bus device, an upper data transfer limit of MMC_IOC_MAX_BYTES
50 * is enforced per ioctl call.  For larger data transfers, use the normal
51 * block device operations.
52 */
53#define MMC_IOC_MAX_BYTES  (512L * 256)
54#endif /* LINUX_MMC_IOCTL_H */
55