diff options
| author | Paul Moore <pmoore@redhat.com> | 2014-06-17 17:30:23 -0400 |
|---|---|---|
| committer | Paul Moore <pmoore@redhat.com> | 2014-06-17 17:30:23 -0400 |
| commit | 170b5910d9fbea79de1bb40df22eda5f98250c0c (patch) | |
| tree | ca9560e878d2842d45c6f99077d0d8b8f8b0f9ba /include/uapi/linux/usb/functionfs.h | |
| parent | 47dd0b76ace953bd2c0479076db0d3e3b9594003 (diff) | |
| parent | 1860e379875dfe7271c649058aeddffe5afd9d0d (diff) | |
Merge tag 'v3.15' into next
Linux 3.15
Diffstat (limited to 'include/uapi/linux/usb/functionfs.h')
| -rw-r--r-- | include/uapi/linux/usb/functionfs.h | 44 |
1 files changed, 30 insertions, 14 deletions
diff --git a/include/uapi/linux/usb/functionfs.h b/include/uapi/linux/usb/functionfs.h index d6b01283f85..2a4b4a72a4f 100644 --- a/include/uapi/linux/usb/functionfs.h +++ b/include/uapi/linux/usb/functionfs.h @@ -10,9 +10,15 @@ enum { FUNCTIONFS_DESCRIPTORS_MAGIC = 1, - FUNCTIONFS_STRINGS_MAGIC = 2 + FUNCTIONFS_STRINGS_MAGIC = 2, + FUNCTIONFS_DESCRIPTORS_MAGIC_V2 = 3, }; +enum functionfs_flags { + FUNCTIONFS_HAS_FS_DESC = 1, + FUNCTIONFS_HAS_HS_DESC = 2, + FUNCTIONFS_HAS_SS_DESC = 4, +}; #ifndef __KERNEL__ @@ -29,29 +35,39 @@ struct usb_endpoint_descriptor_no_audio { /* - * All numbers must be in little endian order. - */ - -struct usb_functionfs_descs_head { - __le32 magic; - __le32 length; - __le32 fs_count; - __le32 hs_count; -} __attribute__((packed)); - -/* * Descriptors format: * * | off | name | type | description | * |-----+-----------+--------------+--------------------------------------| - * | 0 | magic | LE32 | FUNCTIONFS_{FS,HS}_DESCRIPTORS_MAGIC | + * | 0 | magic | LE32 | FUNCTIONFS_DESCRIPTORS_MAGIC_V2 | + * | 4 | length | LE32 | length of the whole data chunk | + * | 8 | flags | LE32 | combination of functionfs_flags | + * | | fs_count | LE32 | number of full-speed descriptors | + * | | hs_count | LE32 | number of high-speed descriptors | + * | | ss_count | LE32 | number of super-speed descriptors | + * | | fs_descrs | Descriptor[] | list of full-speed descriptors | + * | | hs_descrs | Descriptor[] | list of high-speed descriptors | + * | | ss_descrs | Descriptor[] | list of super-speed descriptors | + * + * Depending on which flags are set, various fields may be missing in the + * structure. Any flags that are not recognised cause the whole block to be + * rejected with -ENOSYS. + * + * Legacy descriptors format: + * + * | off | name | type | description | + * |-----+-----------+--------------+--------------------------------------| + * | 0 | magic | LE32 | FUNCTIONFS_DESCRIPTORS_MAGIC | * | 4 | length | LE32 | length of the whole data chunk | * | 8 | fs_count | LE32 | number of full-speed descriptors | * | 12 | hs_count | LE32 | number of high-speed descriptors | * | 16 | fs_descrs | Descriptor[] | list of full-speed descriptors | * | | hs_descrs | Descriptor[] | list of high-speed descriptors | * - * descs are just valid USB descriptors and have the following format: + * All numbers must be in little endian order. + * + * Descriptor[] is an array of valid USB descriptors which have the following + * format: * * | off | name | type | description | * |-----+-----------------+------+--------------------------| |