diff options
author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-12-11 11:18:45 -0200 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-12-11 11:18:45 -0200 |
commit | 9374020a78fce13a1cf2edf3d26f6dd7231b5c3d (patch) | |
tree | 50c8629e6c6222c5b9681506b52afbde818c5e56 /include/uapi/linux/usb/gadgetfs.h | |
parent | d2a0db1ee01aea154ccc460e45a16857e32c4427 (diff) | |
parent | 29594404d7fe73cd80eaa4ee8c43dcc53970c60e (diff) | |
download | talos-op-linux-9374020a78fce13a1cf2edf3d26f6dd7231b5c3d.tar.gz talos-op-linux-9374020a78fce13a1cf2edf3d26f6dd7231b5c3d.zip |
Merge tag 'v3.7' into v4l_for_linus
Linux 3.7
* tag 'v3.7': (1545 commits)
Linux 3.7
Input: matrix-keymap - provide proper module license
Revert "revert "Revert "mm: remove __GFP_NO_KSWAPD""" and associated damage
ipv4: ip_check_defrag must not modify skb before unsharing
Revert "mm: avoid waking kswapd for THP allocations when compaction is deferred or contended"
inet_diag: validate port comparison byte code to prevent unsafe reads
inet_diag: avoid unsafe and nonsensical prefix matches in inet_diag_bc_run()
inet_diag: validate byte code to prevent oops in inet_diag_bc_run()
inet_diag: fix oops for IPv4 AF_INET6 TCP SYN-RECV state
mm: vmscan: fix inappropriate zone congestion clearing
vfs: fix O_DIRECT read past end of block device
net: gro: fix possible panic in skb_gro_receive()
tcp: bug fix Fast Open client retransmission
tmpfs: fix shared mempolicy leak
mm: vmscan: do not keep kswapd looping forever due to individual uncompactable zones
mm: compaction: validate pfn range passed to isolate_freepages_block
mmc: sh-mmcif: avoid oops on spurious interrupts (second try)
Revert misapplied "mmc: sh-mmcif: avoid oops on spurious interrupts"
mmc: sdhci-s3c: fix missing clock for gpio card-detect
lib/Makefile: Fix oid_registry build dependency
...
Diffstat (limited to 'include/uapi/linux/usb/gadgetfs.h')
-rw-r--r-- | include/uapi/linux/usb/gadgetfs.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/include/uapi/linux/usb/gadgetfs.h b/include/uapi/linux/usb/gadgetfs.h new file mode 100644 index 000000000000..0bb12e0d4f8f --- /dev/null +++ b/include/uapi/linux/usb/gadgetfs.h @@ -0,0 +1,88 @@ +/* + * Filesystem based user-mode API to USB Gadget controller hardware + * + * Other than ep0 operations, most things are done by read() and write() + * on endpoint files found in one directory. They are configured by + * writing descriptors, and then may be used for normal stream style + * i/o requests. When ep0 is configured, the device can enumerate; + * when it's closed, the device disconnects from usb. Operations on + * ep0 require ioctl() operations. + * + * Configuration and device descriptors get written to /dev/gadget/$CHIP, + * which may then be used to read usb_gadgetfs_event structs. The driver + * may activate endpoints as it handles SET_CONFIGURATION setup events, + * or earlier; writing endpoint descriptors to /dev/gadget/$ENDPOINT + * then performing data transfers by reading or writing. + */ + +#ifndef __LINUX_USB_GADGETFS_H +#define __LINUX_USB_GADGETFS_H + +#include <linux/types.h> +#include <linux/ioctl.h> + +#include <linux/usb/ch9.h> + +/* + * 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_gadgetfs_event_type { + GADGETFS_NOP = 0, + + GADGETFS_CONNECT, + GADGETFS_DISCONNECT, + GADGETFS_SETUP, + GADGETFS_SUSPEND, + /* and likely more ! */ +}; + +/* NOTE: this structure must stay the same size and layout on + * both 32-bit and 64-bit kernels. + */ +struct usb_gadgetfs_event { + union { + /* NOP, DISCONNECT, SUSPEND: nothing + * ... some hardware can't report disconnection + */ + + /* CONNECT: just the speed */ + enum usb_device_speed speed; + + /* SETUP: packet; DATA phase i/o precedes next event + *(setup.bmRequestType & USB_DIR_IN) flags direction + * ... includes SET_CONFIGURATION, SET_INTERFACE + */ + struct usb_ctrlrequest setup; + } u; + enum usb_gadgetfs_event_type type; +}; + + +/* The 'g' code is also used by printer gadget ioctl requests. + * Don't add any colliding codes to either driver, and keep + * them in unique ranges (size 0x20 for now). + */ + +/* endpoint ioctls */ + +/* 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 GADGETFS_FIFO_STATUS _IO('g', 1) + +/* discards any unclaimed data in the fifo. */ +#define GADGETFS_FIFO_FLUSH _IO('g', 2) + +/* resets endpoint halt+toggle; used to implement set_interface. + * some hardware (like pxa2xx) can't support this. + */ +#define GADGETFS_CLEAR_HALT _IO('g', 3) + +#endif /* __LINUX_USB_GADGETFS_H */ |