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John Calixtocb87ea22011-04-26 18:56:29 -04001#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)
Robert P. J. Day100e9182011-05-27 16:04:03 -040054#endif /* LINUX_MMC_IOCTL_H */