Re: [Qemu-devel] [PATCH 1/3] usb-hub: wakeup on attach

[hkran]

On 11/03/2011 04:41 PM, Gerd Hoffmann wrote:
> On 11/03/11 07:01, hkran wrote:
> > On 11/02/2011 08:56 PM, Gerd Hoffmann wrote:
> > >     Hi,
> > >
> > > > >     static void usb_hub_detach(USBPort *port1)
> > > > pulled, In what cases, the usb hub will be suspended? and how to tell it
> > > > happened? thanks.
> > > The guest enables the remote-wakeup feature.  'lspci -v' (within the
> > > guest) shows it.
> > >
> > > cheers,
> > >     Gerd
> > I use the param "-usb -usbdevice tablet" to start qemu  and then usb_del
> > tablet via monitor console after getting qemu up.
> > I saw this by entering lsusb -v
> >
> > Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> > Device Descriptor:
> >    bLength                18
> >    bDescriptorType         1
> >    bcdUSB               1.10
> >    bDeviceClass            9 Hub
> >    bDeviceSubClass         0 Unused
> >    bDeviceProtocol         0 Full speed (or root) hub
> >    bMaxPacketSize0        64
> >    idVendor           0x1d6b Linux Foundation
> >    idProduct          0x0001 1.1 root hub
> >    bcdDevice            2.06
> >    iManufacturer           3 Linux 2.6.32-131.0.15.el6.x86_64 uhci_hcd
> >    iProduct                2 UHCI Host Controller
> >    iSerial                 1 0000:00:01.2
> > ..........................
> > Hub Descriptor:
> >    bLength               9
> >    bDescriptorType      41
> >    nNbrPorts             2
> >    wHubCharacteristic 0x000a
> >      No power switching (usb 1.0)
> >      Per-port overcurrent protection
> >    bPwrOn2PwrGood        1 * 2 milli seconds
> >    bHubContrCurrent      0 milli Ampere
> >    DeviceRemovable    0x00
> >    PortPwrCtrlMask    0xff
> >   Hub Port Status:
> >     Port 1: 0000.0100 power
> >     Port 2: 0000.0100 power
> > Device Status:     0x0003
> >    Self Powered
> >    Remote Wakeup Enabled
> >
> > (It seems that the Remote-wakeup feature has been enabled)
> > There are two ports with the status "power",  and I do not know how to
> > make it suspended yet. Can you help more ?
> That is the root hub created by the linux kernel, not the hub emulated
> by qemu.  If you hook up just a single device no hob is needed.
>
> cheers,
>    Gerd
Yes, it is. After I usb_add a storage a 8-port hub emulated is added :

lsusb
Bus 001 Device 004: ID 0000:7777
Bus 001 Device 003: ID 0000:0000
Bus 001 Device 002: ID 0627:0001 Adomax Technology Co., Ltd
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

Device 003 is the hub and Device 004 is my storage

lsusb -s 3 -v:

Bus 001 Device 003: ID 0000:0000
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.10
  bDeviceClass            9 Hub
  bDeviceSubClass         0 Unused
  bDeviceProtocol         0 Full speed (or root) hub
  bMaxPacketSize0         8
  idVendor           0x0000
  idProduct          0x0000
  bcdDevice            1.01
  iManufacturer           1 QEMU 0.15.50
  iProduct                2 QEMU USB Hub
  iSerial                 3 314159
  bNumConfigurations      1
...........................................
    iConfiguration          0
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         9 Hub
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 Full speed (or root) hub
      iInterface              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0002  1x 2 bytes
        bInterval             255
Hub Descriptor:
  bLength              10
  bDescriptorType      41
  nNbrPorts             8
  wHubCharacteristic 0x000a
    No power switching (usb 1.0)
    Per-port overcurrent protection
  bPwrOn2PwrGood        1 * 2 milli seconds
  bHubContrCurrent      0 milli Ampere
  DeviceRemovable    0x00 0x00
  PortPwrCtrlMask    0xff 0x00
 Hub Port Status:
   Port 1: 0000.0103 power enable connect
   Port 2: 0000.0100 power
   Port 3: 0000.0100 power
   Port 4: 0000.0100 power
   Port 5: 0000.0100 power
   Port 6: 0000.0100 power
   Port 7: 0000.0100 power
   Port 8: 0000.0100 power
Device Status:     0x0001
  Self Powered

my storage is connected to the port 1.

after usb_del, all the hub port status will turn to power. how should i 
do next to get it to be suspended?thanks.