Hi,
I have a Western Digital usb HDD, it has some nice LEDs to show the disk
usage, but sadly they works only with Windows.
This is the syslog:
usb 1-1: new high speed USB device using ehci_hcd and address 3
usb 1-1: configuration #1 chosen from 1 choice
input: Western Digital External HDD as /devices/pci0000:00/0000:00:1d.7/usb1/1-1/1-1:1.1/input/input7
generic-usb 0003:1058:0705.0002: input,hidraw0: USB HID v1.10 Device [Western Digital External HDD ] on usb-0000:00:1d.7-1/input1
Initializing USB Mass Storage driver...
scsi3 : SCSI emulation for USB Mass Storage devices
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
usb-storage: device found at 3
usb-storage: waiting for device to settle before scanning
scsi 3:0:0:0: Direct-Access WD 3200BEV External 1.75 PQ: 0 ANSI: 4
sd 3:0:0:0: [sdb] 625142448 512-byte hardware sectors: (320 GB/298 GiB)
sd 3:0:0:0: [sdb] Write Protect is off
sd 3:0:0:0: [sdb] Mode Sense: 23 00 00 00
sd 3:0:0:0: [sdb] Assuming drive cache: write through
sd 3:0:0:0: [sdb] 625142448 512-byte hardware sectors: (320 GB/298 GiB)
sd 3:0:0:0: [sdb] Write Protect is off
sd 3:0:0:0: [sdb] Mode Sense: 23 00 00 00
sd 3:0:0:0: [sdb] Assuming drive cache: write through
sdb: sdb1
sd 3:0:0:0: [sdb] Attached SCSI disk
sd 3:0:0:0: Attached scsi generic sg2 type 0
usb-storage: device scan complete
so it seems that the LEDs are an USB HID device, and udev creates /dev/hidraw0
lsusb -n says:
Bus 001 Device 003: ID 1058:0705 Western Digital Technologies, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x1058 Western Digital Technologies, Inc.
idProduct 0x0705
bcdDevice 1.75
iManufacturer 1 Western Digital
iProduct 2 External HDD
iSerial 3 57442D575848393038343538303037
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 57
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 2mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk (Zip)
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 0 None
iInterface 5 WD HID INTERFACE
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 33
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 6
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0001
Self Powered
note the lines:
bInterfaceClass 8 Mass Storage
bInterfaceClass 3 Human Interface Device
My question now is: how can we make the LEDs configurable by Linux?
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