1 files changed, 57 insertions, 0 deletions

diff --git a/include/uapi/linux/mmc/ioctl.h b/include/uapi/linux/mmc/ioctl.h
new file mode 100644
index 000000000000..1f5e68923929
--- /dev/null
+++ b/include/uapi/linux/mmc/ioctl.h
@@ -0,0 +1,57 @@
+#ifndef LINUX_MMC_IOCTL_H
+#define LINUX_MMC_IOCTL_H
+
+#include <linux/types.h>
+
+struct mmc_ioc_cmd {
+        /* Implies direction of data.  true = write, false = read */
+        int write_flag;
+
+        /* Application-specific command.  true = precede with CMD55 */
+        int is_acmd;
+
+        __u32 opcode;
+        __u32 arg;
+        __u32 response[4];  /* CMD response */
+        unsigned int flags;
+        unsigned int blksz;
+        unsigned int blocks;
+
+        /*
+         * Sleep at least postsleep_min_us useconds, and at most
+         * postsleep_max_us useconds *after* issuing command.  Needed for
+         * some read commands for which cards have no other way of indicating
+         * they're ready for the next command (i.e. there is no equivalent of
+         * a "busy" indicator for read operations).
+         */
+        unsigned int postsleep_min_us;
+        unsigned int postsleep_max_us;
+
+        /*
+         * Override driver-computed timeouts.  Note the difference in units!
+         */
+        unsigned int data_timeout_ns;
+        unsigned int cmd_timeout_ms;
+
+        /*
+         * For 64-bit machines, the next member, ``__u64 data_ptr``, wants to
+         * be 8-byte aligned.  Make sure this struct is the same size when
+         * built for 32-bit.
+         */
+        __u32 __pad;
+
+        /* DAT buffer */
+        __u64 data_ptr;
+};
+#define mmc_ioc_cmd_set_data(ic, ptr) ic.data_ptr = (__u64)(unsigned long) ptr
+
+#define MMC_IOC_CMD _IOWR(MMC_BLOCK_MAJOR, 0, struct mmc_ioc_cmd)
+
+/*
+ * Since this ioctl is only meant to enhance (and not replace) normal access
+ * to the mmc bus device, an upper data transfer limit of MMC_IOC_MAX_BYTES
+ * is enforced per ioctl call.  For larger data transfers, use the normal
+ * block device operations.
+ */
+#define MMC_IOC_MAX_BYTES  (512L * 256)
+#endif /* LINUX_MMC_IOCTL_H */