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 #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