diff options
| author | Robert Baldyga <r.baldyga@samsung.com> | 2014-09-09 08:23:16 +0200 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-09-14 17:05:22 +0200 |
| commit | 17882e4f29339cc4e67bb13ec425ffff1a9d7354 (patch) | |
| tree | e2c5e17ad2096254c0ef0e0eb42e78ada1db443a /drivers/usb/gadget | |
| parent | d658e01cac98cfbc1e0edba4e8e564ba668a6e2f (diff) | |
usb: gadget: f_fs: add ioctl returning ep descriptor
This patch introduces ioctl named FUNCTIONFS_ENDPOINT_DESC, which
returns endpoint descriptor to userspace. It works only if function
is active.
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Jerry Zhang <zhangjerry@google.com>
Change-Id: I55987bf0c6744327f7763b567b5a2b39c50d18e6
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/f_fs.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c index ff6514982..dce917ed3 100644 --- a/drivers/usb/gadget/f_fs.c +++ b/drivers/usb/gadget/f_fs.c @@ -1000,6 +1000,29 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code, case FUNCTIONFS_ENDPOINT_REVMAP: ret = epfile->ep->num; break; + case FUNCTIONFS_ENDPOINT_DESC: + { + int desc_idx; + struct usb_endpoint_descriptor *desc; + + switch (epfile->ffs->gadget->speed) { + case USB_SPEED_SUPER: + desc_idx = 2; + break; + case USB_SPEED_HIGH: + desc_idx = 1; + break; + default: + desc_idx = 0; + } + desc = epfile->ep->descs[desc_idx]; + + spin_unlock_irq(&epfile->ffs->eps_lock); + ret = copy_to_user((void *)value, desc, sizeof(*desc)); + if (ret) + ret = -EFAULT; + return ret; + } default: ret = -ENOTTY; } |