From 17882e4f29339cc4e67bb13ec425ffff1a9d7354 Mon Sep 17 00:00:00 2001 From: Robert Baldyga Date: Tue, 9 Sep 2014 08:23:16 +0200 Subject: 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 Acked-by: Michal Nazarewicz Signed-off-by: Felipe Balbi Signed-off-by: Jerry Zhang Change-Id: I55987bf0c6744327f7763b567b5a2b39c50d18e6 --- drivers/usb/gadget/f_fs.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'drivers') 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; } -- cgit v1.2.3