1 #ifndef LINUX_MMC_IOCTL_H 2 #define LINUX_MMC_IOCTL_H 3 struct 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