mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 21:48:53 +07:00
96a420d2d3
When FUNCTIONFS_EVENTFD flag is set, __ffs_data_got_descs reads a 32bits, little-endian value right after the fixed structure header, and passes it to eventfd_ctx_fdget. Document this. Also, rephrase a comment to be affirmative about the role of string descriptor at index 0. Ref: USB 2.0 spec paragraph "9.6.7 String", and also checked to still be current in USB 3.0 spec paragraph "9.6.9 String". Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
292 lines
10 KiB
C
292 lines
10 KiB
C
#ifndef _UAPI__LINUX_FUNCTIONFS_H__
|
|
#define _UAPI__LINUX_FUNCTIONFS_H__
|
|
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/ioctl.h>
|
|
|
|
#include <linux/usb/ch9.h>
|
|
|
|
|
|
enum {
|
|
FUNCTIONFS_DESCRIPTORS_MAGIC = 1,
|
|
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,
|
|
FUNCTIONFS_HAS_MS_OS_DESC = 8,
|
|
FUNCTIONFS_VIRTUAL_ADDR = 16,
|
|
FUNCTIONFS_EVENTFD = 32,
|
|
FUNCTIONFS_ALL_CTRL_RECIP = 64,
|
|
FUNCTIONFS_CONFIG0_SETUP = 128,
|
|
};
|
|
|
|
/* Descriptor of an non-audio endpoint */
|
|
struct usb_endpoint_descriptor_no_audio {
|
|
__u8 bLength;
|
|
__u8 bDescriptorType;
|
|
|
|
__u8 bEndpointAddress;
|
|
__u8 bmAttributes;
|
|
__le16 wMaxPacketSize;
|
|
__u8 bInterval;
|
|
} __attribute__((packed));
|
|
|
|
struct usb_functionfs_descs_head_v2 {
|
|
__le32 magic;
|
|
__le32 length;
|
|
__le32 flags;
|
|
/*
|
|
* __le32 fs_count, hs_count, fs_count; must be included manually in
|
|
* the structure taking flags into consideration.
|
|
*/
|
|
} __attribute__((packed));
|
|
|
|
/* Legacy format, deprecated as of 3.14. */
|
|
struct usb_functionfs_descs_head {
|
|
__le32 magic;
|
|
__le32 length;
|
|
__le32 fs_count;
|
|
__le32 hs_count;
|
|
} __attribute__((packed, deprecated));
|
|
|
|
/* MS OS Descriptor header */
|
|
struct usb_os_desc_header {
|
|
__u8 interface;
|
|
__le32 dwLength;
|
|
__le16 bcdVersion;
|
|
__le16 wIndex;
|
|
union {
|
|
struct {
|
|
__u8 bCount;
|
|
__u8 Reserved;
|
|
};
|
|
__le16 wCount;
|
|
};
|
|
} __attribute__((packed));
|
|
|
|
struct usb_ext_compat_desc {
|
|
__u8 bFirstInterfaceNumber;
|
|
__u8 Reserved1;
|
|
__u8 CompatibleID[8];
|
|
__u8 SubCompatibleID[8];
|
|
__u8 Reserved2[6];
|
|
};
|
|
|
|
struct usb_ext_prop_desc {
|
|
__le32 dwSize;
|
|
__le32 dwPropertyDataType;
|
|
__le16 wPropertyNameLength;
|
|
} __attribute__((packed));
|
|
|
|
#ifndef __KERNEL__
|
|
|
|
/*
|
|
* Descriptors format:
|
|
*
|
|
* | off | name | type | description |
|
|
* |-----+-----------+--------------+--------------------------------------|
|
|
* | 0 | magic | LE32 | FUNCTIONFS_DESCRIPTORS_MAGIC_V2 |
|
|
* | 4 | length | LE32 | length of the whole data chunk |
|
|
* | 8 | flags | LE32 | combination of functionfs_flags |
|
|
* | | eventfd | LE32 | eventfd file descriptor |
|
|
* | | fs_count | LE32 | number of full-speed descriptors |
|
|
* | | hs_count | LE32 | number of high-speed descriptors |
|
|
* | | ss_count | LE32 | number of super-speed descriptors |
|
|
* | | os_count | LE32 | number of MS OS 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 |
|
|
* | | os_descrs | OSDesc[] | list of MS OS 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 (deprecated as of 3.14):
|
|
*
|
|
* | 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 |
|
|
*
|
|
* 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 |
|
|
* |-----+-----------------+------+--------------------------|
|
|
* | 0 | bLength | U8 | length of the descriptor |
|
|
* | 1 | bDescriptorType | U8 | descriptor type |
|
|
* | 2 | payload | | descriptor's payload |
|
|
*
|
|
* OSDesc[] is an array of valid MS OS Feature Descriptors which have one of
|
|
* the following formats:
|
|
*
|
|
* | off | name | type | description |
|
|
* |-----+-----------------+------+--------------------------|
|
|
* | 0 | inteface | U8 | related interface number |
|
|
* | 1 | dwLength | U32 | length of the descriptor |
|
|
* | 5 | bcdVersion | U16 | currently supported: 1 |
|
|
* | 7 | wIndex | U16 | currently supported: 4 |
|
|
* | 9 | bCount | U8 | number of ext. compat. |
|
|
* | 10 | Reserved | U8 | 0 |
|
|
* | 11 | ExtCompat[] | | list of ext. compat. d. |
|
|
*
|
|
* | off | name | type | description |
|
|
* |-----+-----------------+------+--------------------------|
|
|
* | 0 | inteface | U8 | related interface number |
|
|
* | 1 | dwLength | U32 | length of the descriptor |
|
|
* | 5 | bcdVersion | U16 | currently supported: 1 |
|
|
* | 7 | wIndex | U16 | currently supported: 5 |
|
|
* | 9 | wCount | U16 | number of ext. compat. |
|
|
* | 11 | ExtProp[] | | list of ext. prop. d. |
|
|
*
|
|
* ExtCompat[] is an array of valid Extended Compatiblity descriptors
|
|
* which have the following format:
|
|
*
|
|
* | off | name | type | description |
|
|
* |-----+-----------------------+------+-------------------------------------|
|
|
* | 0 | bFirstInterfaceNumber | U8 | index of the interface or of the 1st|
|
|
* | | | | interface in an IAD group |
|
|
* | 1 | Reserved | U8 | 0 |
|
|
* | 2 | CompatibleID | U8[8]| compatible ID string |
|
|
* | 10 | SubCompatibleID | U8[8]| subcompatible ID string |
|
|
* | 18 | Reserved | U8[6]| 0 |
|
|
*
|
|
* ExtProp[] is an array of valid Extended Properties descriptors
|
|
* which have the following format:
|
|
*
|
|
* | off | name | type | description |
|
|
* |-----+-----------------------+------+-------------------------------------|
|
|
* | 0 | dwSize | U32 | length of the descriptor |
|
|
* | 4 | dwPropertyDataType | U32 | 1..7 |
|
|
* | 8 | wPropertyNameLength | U16 | bPropertyName length (NL) |
|
|
* | 10 | bPropertyName |U8[NL]| name of this property |
|
|
* |10+NL| dwPropertyDataLength | U32 | bPropertyData length (DL) |
|
|
* |14+NL| bProperty |U8[DL]| payload of this property |
|
|
*/
|
|
|
|
struct usb_functionfs_strings_head {
|
|
__le32 magic;
|
|
__le32 length;
|
|
__le32 str_count;
|
|
__le32 lang_count;
|
|
} __attribute__((packed));
|
|
|
|
/*
|
|
* Strings format:
|
|
*
|
|
* | off | name | type | description |
|
|
* |-----+------------+-----------------------+----------------------------|
|
|
* | 0 | magic | LE32 | FUNCTIONFS_STRINGS_MAGIC |
|
|
* | 4 | length | LE32 | length of the data chunk |
|
|
* | 8 | str_count | LE32 | number of strings |
|
|
* | 12 | lang_count | LE32 | number of languages |
|
|
* | 16 | stringtab | StringTab[lang_count] | table of strings per lang |
|
|
*
|
|
* For each language there is one stringtab entry (ie. there are lang_count
|
|
* stringtab entires). Each StringTab has following format:
|
|
*
|
|
* | off | name | type | description |
|
|
* |-----+---------+-------------------+------------------------------------|
|
|
* | 0 | lang | LE16 | language code |
|
|
* | 2 | strings | String[str_count] | array of strings in given language |
|
|
*
|
|
* For each string there is one strings entry (ie. there are str_count
|
|
* string entries). Each String is a NUL terminated string encoded in
|
|
* UTF-8.
|
|
*/
|
|
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Events are delivered on the ep0 file descriptor, when the user mode driver
|
|
* reads from this file descriptor after writing the descriptors. Don't
|
|
* stop polling this descriptor.
|
|
*/
|
|
|
|
enum usb_functionfs_event_type {
|
|
FUNCTIONFS_BIND,
|
|
FUNCTIONFS_UNBIND,
|
|
|
|
FUNCTIONFS_ENABLE,
|
|
FUNCTIONFS_DISABLE,
|
|
|
|
FUNCTIONFS_SETUP,
|
|
|
|
FUNCTIONFS_SUSPEND,
|
|
FUNCTIONFS_RESUME
|
|
};
|
|
|
|
/* NOTE: this structure must stay the same size and layout on
|
|
* both 32-bit and 64-bit kernels.
|
|
*/
|
|
struct usb_functionfs_event {
|
|
union {
|
|
/* SETUP: packet; DATA phase i/o precedes next event
|
|
*(setup.bmRequestType & USB_DIR_IN) flags direction */
|
|
struct usb_ctrlrequest setup;
|
|
} __attribute__((packed)) u;
|
|
|
|
/* enum usb_functionfs_event_type */
|
|
__u8 type;
|
|
__u8 _pad[3];
|
|
} __attribute__((packed));
|
|
|
|
|
|
/* Endpoint ioctls */
|
|
/* The same as in gadgetfs */
|
|
|
|
/* IN transfers may be reported to the gadget driver as complete
|
|
* when the fifo is loaded, before the host reads the data;
|
|
* OUT transfers may be reported to the host's "client" driver as
|
|
* complete when they're sitting in the FIFO unread.
|
|
* THIS returns how many bytes are "unclaimed" in the endpoint fifo
|
|
* (needed for precise fault handling, when the hardware allows it)
|
|
*/
|
|
#define FUNCTIONFS_FIFO_STATUS _IO('g', 1)
|
|
|
|
/* discards any unclaimed data in the fifo. */
|
|
#define FUNCTIONFS_FIFO_FLUSH _IO('g', 2)
|
|
|
|
/* resets endpoint halt+toggle; used to implement set_interface.
|
|
* some hardware (like pxa2xx) can't support this.
|
|
*/
|
|
#define FUNCTIONFS_CLEAR_HALT _IO('g', 3)
|
|
|
|
/* Specific for functionfs */
|
|
|
|
/*
|
|
* Returns reverse mapping of an interface. Called on EP0. If there
|
|
* is no such interface returns -EDOM. If function is not active
|
|
* returns -ENODEV.
|
|
*/
|
|
#define FUNCTIONFS_INTERFACE_REVMAP _IO('g', 128)
|
|
|
|
/*
|
|
* Returns real bEndpointAddress of an endpoint. If function is not
|
|
* active returns -ENODEV.
|
|
*/
|
|
#define FUNCTIONFS_ENDPOINT_REVMAP _IO('g', 129)
|
|
|
|
/*
|
|
* Returns endpoint descriptor. If function is not active returns -ENODEV.
|
|
*/
|
|
#define FUNCTIONFS_ENDPOINT_DESC _IOR('g', 130, \
|
|
struct usb_endpoint_descriptor)
|
|
|
|
|
|
|
|
#endif /* _UAPI__LINUX_FUNCTIONFS_H__ */
|