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Diffstat (limited to 'drivers/usb/storage/uas-detect.h')
| -rw-r--r-- | drivers/usb/storage/uas-detect.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/usb/storage/uas-detect.h b/drivers/usb/storage/uas-detect.h index 082bde1fa74d..8de030a0a4a4 100644 --- a/drivers/usb/storage/uas-detect.h +++ b/drivers/usb/storage/uas-detect.h @@ -40,6 +40,33 @@ static int uas_find_uas_alt_setting(struct usb_interface *intf) return -ENODEV; } +static int uas_find_endpoints(struct usb_host_interface *alt, + struct usb_host_endpoint *eps[]) +{ + struct usb_host_endpoint *endpoint = alt->endpoint; + unsigned i, n_endpoints = alt->desc.bNumEndpoints; + + for (i = 0; i < n_endpoints; i++) { + unsigned char *extra = endpoint[i].extra; + int len = endpoint[i].extralen; + while (len >= 3) { + if (extra[1] == USB_DT_PIPE_USAGE) { + unsigned pipe_id = extra[2]; + if (pipe_id > 0 && pipe_id < 5) + eps[pipe_id - 1] = &endpoint[i]; + break; + } + len -= extra[0]; + extra += extra[0]; + } + } + + if (!eps[0] || !eps[1] || !eps[2] || !eps[3]) + return -ENODEV; + + return 0; +} + static int uas_use_uas_driver(struct usb_interface *intf, const struct usb_device_id *id) { |