diff options
Diffstat (limited to 'hw/usb-desc.c')
| -rw-r--r-- | hw/usb-desc.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/hw/usb-desc.c b/hw/usb-desc.c index 3c3ed6a802..ccf85ade9e 100644 --- a/hw/usb-desc.c +++ b/hw/usb-desc.c @@ -536,7 +536,11 @@ int usb_desc_handle_control(USBDevice *dev, USBPacket *p, break; case DeviceRequest | USB_REQ_GET_CONFIGURATION: - data[0] = dev->config->bConfigurationValue; + /* + * 9.4.2: 0 should be returned if the device is unconfigured, otherwise + * the non zero value of bConfigurationValue. + */ + data[0] = dev->config ? dev->config->bConfigurationValue : 0; ret = 1; break; case DeviceOutRequest | USB_REQ_SET_CONFIGURATION: @@ -544,9 +548,18 @@ int usb_desc_handle_control(USBDevice *dev, USBPacket *p, trace_usb_set_config(dev->addr, value, ret); break; - case DeviceRequest | USB_REQ_GET_STATUS: + case DeviceRequest | USB_REQ_GET_STATUS: { + const USBDescConfig *config = dev->config ? + dev->config : &dev->device->confs[0]; + data[0] = 0; - if (dev->config->bmAttributes & 0x40) { + /* + * Default state: Device behavior when this request is received while + * the device is in the Default state is not specified. + * We return the same value that a configured device would return if + * it used the first configuration. + */ + if (config->bmAttributes & 0x40) { data[0] |= 1 << USB_DEVICE_SELF_POWERED; } if (dev->remote_wakeup) { @@ -555,6 +568,7 @@ int usb_desc_handle_control(USBDevice *dev, USBPacket *p, data[1] = 0x00; ret = 2; break; + } case DeviceOutRequest | USB_REQ_CLEAR_FEATURE: if (value == USB_DEVICE_REMOTE_WAKEUP) { dev->remote_wakeup = 0; |