1#ifndef LINUX_MMC_IOCTL_H
2#define LINUX_MMC_IOCTL_H
3
4#include <linux/types.h>
5
6struct 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#define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd)
49
50/*
51 * Since this ioctl is only meant to enhance (and not replace) normal access
52 * to the mmc bus device, an upper data transfer limit of MMC_IOC_MAX_BYTES
53 * is enforced per ioctl call.  For larger data transfers, use the normal
54 * block device operations.
55 */
56#define MMC_IOC_MAX_BYTES  (512L * 256)
57#endif /* LINUX_MMC_IOCTL_H */
58