forked from Minki/linux
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>
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@ -1026,6 +1026,29 @@ static long ffs_epfile_ioctl(struct file *file, unsigned code,
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case FUNCTIONFS_ENDPOINT_REVMAP:
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ret = epfile->ep->num;
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break;
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case FUNCTIONFS_ENDPOINT_DESC:
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{
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int desc_idx;
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struct usb_endpoint_descriptor *desc;
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switch (epfile->ffs->gadget->speed) {
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case USB_SPEED_SUPER:
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desc_idx = 2;
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break;
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case USB_SPEED_HIGH:
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desc_idx = 1;
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break;
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default:
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desc_idx = 0;
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}
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desc = epfile->ep->descs[desc_idx];
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spin_unlock_irq(&epfile->ffs->eps_lock);
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ret = copy_to_user((void *)value, desc, sizeof(*desc));
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if (ret)
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ret = -EFAULT;
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return ret;
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}
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default:
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ret = -ENOTTY;
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}
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@ -275,6 +275,12 @@ struct usb_functionfs_event {
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*/
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#define FUNCTIONFS_ENDPOINT_REVMAP _IO('g', 129)
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/*
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* Returns endpoint descriptor. If function is not active returns -ENODEV.
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*/
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#define FUNCTIONFS_ENDPOINT_DESC _IOR('g', 130, \
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struct usb_endpoint_descriptor)
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#endif /* _UAPI__LINUX_FUNCTIONFS_H__ */
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