LXR linux/include/uapi/linux/mmc/ioctl.h

   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/**
  49 * struct mmc_ioc_multi_cmd - multi command information
  50 * @num_of_cmds: Number of commands to send. Must be equal to or less than
  51 *      MMC_IOC_MAX_CMDS.
  52 * @cmds: Array of commands with length equal to 'num_of_cmds'
  53 */
  54struct mmc_ioc_multi_cmd {
  55        __u64 num_of_cmds;
  56        struct mmc_ioc_cmd cmds[0];
  57};
  58
  59#define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd)
  60/*
  61 * MMC_IOC_MULTI_CMD: Used to send an array of MMC commands described by
  62 *      the structure mmc_ioc_multi_cmd. The MMC driver will issue all
  63 *      commands in array in sequence to card.
  64 */
  65#define MMC_IOC_MULTI_CMD _IOWR(MMC_BLOCK_MAJOR, 1, struct mmc_ioc_multi_cmd)
  66/*
  67 * Since this ioctl is only meant to enhance (and not replace) normal access
  68 * to the mmc bus device, an upper data transfer limit of MMC_IOC_MAX_BYTES
  69 * is enforced per ioctl call.  For larger data transfers, use the normal
  70 * block device operations.
  71 */
  72#define MMC_IOC_MAX_BYTES  (512L * 256)
  73#define MMC_IOC_MAX_CMDS    255
  74#endif /* LINUX_MMC_IOCTL_H */
  75