diff options
| -rw-r--r-- | usb-linux.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/usb-linux.c b/usb-linux.c index 111fe1c788..ccf70734e3 100644 --- a/usb-linux.c +++ b/usb-linux.c @@ -152,6 +152,8 @@ static QTAILQ_HEAD(, USBHostDevice) hostdevs = QTAILQ_HEAD_INITIALIZER(hostdevs) static int usb_host_close(USBHostDevice *dev); static int parse_filter(const char *spec, struct USBAutoFilter *f); static void usb_host_auto_check(void *unused); +static int usb_host_read_file(char *line, size_t line_size, + const char *device_file, const char *device_name); static int is_isoc(USBHostDevice *s, int ep) { @@ -781,6 +783,23 @@ static int usb_linux_get_configuration(USBHostDevice *s) struct usb_ctrltransfer ct; int ret; + if (usb_fs_type == USB_FS_SYS) { + char device_name[32], line[1024]; + int configuration; + + sprintf(device_name, "%d-%d", s->bus_num, s->devpath); + + if (!usb_host_read_file(line, sizeof(line), "bConfigurationValue", + device_name)) { + goto usbdevfs; + } + if (sscanf(line, "%d", &configuration) != 1) { + goto usbdevfs; + } + return configuration; + } + +usbdevfs: ct.bRequestType = USB_DIR_IN; ct.bRequest = USB_REQ_GET_CONFIGURATION; ct.wValue = 0; |