How difficult would it be to get the Wacom Graphire (it says ET-0405-U on
the bottom of my tablet) to work with the uwacom driver which claims to
only support the CTL-490?

When I plug the tablet in I get this in my console:
uhidev2 at uhub0 port 5 configuration 1 interface 0 "WACOM ET-0405-UV1.1-1"
rev 1.00/1.11 addr 7
uhidev2: iclass 3/1, 3 report ids
uhid0 at uhidev2 reportid 2: input=7, output=0, feature=2
uhid1 at uhidev2 reportid 3: input=0, output=0, feature=2

I would imagine the tablet has similar core functionality to the CTL-490 so
I thought I would start by trying to add a device entry. I noticed that the
/usr/src/sys/dev/usb/usbdevs file already contains an definition for WACOM
CT0405U and GRAPHIRE.
$ usbdev -v:
addr 1: super speed, self powered, config 1, xHCI root hub(0x0000),
Intel(0x8086), rev 1.00
 port 5 addr 5: low speed, power 40 mA, config 1, ET-0405-UV1.1-1(0x0010),
WACOM(0x056a), rev 1.11
...

Since my device shows up as 0x0010 I included the GRAPHIRE in the device
list:
const struct usb_devno uwacom_devs[] = {
        { USB_VENDOR_WACOM, USB_PRODUCT_WACOM_INTUOS_DRAW },
        { USB_VENDOR_WACOM, USB_PRODUCT_WACOM_GRAPHIRE }
};

I compile the kernel:
$ cd /usr/src/sys/arch/amd64/conf/
$ config GENERIC.MP
$ cd ../compile/GENERIC.MP/
$ make
$ doas make install
$ doas reboot

After the reboot it doesn't seem to attach a uwacom1 device.
$ dmesg | grep uwacom; echo $?
1

Any ideas or tips to proceed?
-- 
-alfred
OpenBSD 6.1 (GENERIC.MP) #3: Wed May 17 06:19:35 PDT 2017
    [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 4197285888 (4002MB)
avail mem = 4065402880 (3877MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xdbd81018 (73 entries)
bios0: vendor American Megatrends Inc. version "B246P105" date 06/01/2015
bios0: ZOTAC ZBOX-CI321NANO
acpi0 at bios0: rev 2
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP APIC FPDT MSDM LPIT SSDT SSDT SSDT MCFG HPET SSDT SSDT 
BGRT
acpi0: wakeup devices PXSX(S4) RP01(S4) PXSX(S4) PXSX(S4) RP03(S4) PXSX(S4) 
RP04(S4) PXSX(S4) RP05(S4) PXSX(S4) PXSX(S4) PXSX(S4) GLAN(S4) EHC1(S4) 
EHC2(S4) XHC_(S4) [...]
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Celeron(R) 2961Y @ 1.10GHz, 1097.60 MHz
cpu0: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,XSAVE,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,ERMS,INVPCID,SENSOR,ARAT
cpu0: 256KB 64b/line 8-way L2 cache
cpu0: TSC frequency 1097602360 Hz
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges
cpu0: apic clock running at 99MHz
cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4.1.1.1, IBE
cpu1 at mainbus0: apid 2 (application processor)
cpu1: Intel(R) Celeron(R) 2961Y @ 1.10GHz, 1097.46 MHz
cpu1: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,DEADLINE,XSAVE,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,PERF,ITSC,FSGSBASE,ERMS,INVPCID,SENSOR,ARAT
cpu1: 256KB 64b/line 8-way L2 cache
cpu1: smt 0, core 1, package 0
ioapic0 at mainbus0: apid 8 pa 0xfec00000, version 20, 40 pins
acpimcfg0 at acpi0 addr 0xf8000000, bus 0-63
acpihpet0 at acpi0: 14318179 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (RP01)
acpiprt2 at acpi0: bus 2 (RP03)
acpiprt3 at acpi0: bus 3 (RP04)
acpiprt4 at acpi0: bus 4 (RP05)
acpiprt5 at acpi0: bus -1 (PEG0)
acpiprt6 at acpi0: bus -1 (PEG1)
acpiprt7 at acpi0: bus -1 (PEG2)
acpiec0 at acpi0: not present
acpicpu0 at acpi0: C3(200@506 mwait.1@0x60), C2(200@148 mwait.1@0x33), 
C1(1000@1 mwait.1), PSS
acpicpu1 at acpi0: C3(200@506 mwait.1@0x60), C2(200@148 mwait.1@0x33), 
C1(1000@1 mwait.1), PSS
acpipwrres0 at acpi0: FN00, resource for FAN0
acpipwrres1 at acpi0: FN01, resource for FAN1
acpipwrres2 at acpi0: FN02, resource for FAN2
acpipwrres3 at acpi0: FN03, resource for FAN3
acpipwrres4 at acpi0: FN04, resource for FAN4
acpitz0 at acpi0: critical temperature is 105 degC
acpitz1 at acpi0: critical temperature is 105 degC
"INT3F0D" at acpi0 not configured
"PNP0501" at acpi0 not configured
"NTN0530" at acpi0 not configured
acpibtn0 at acpi0: PWRB
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
"PNP0C0B" at acpi0 not configured
acpivideo0 at acpi0: GFX0
acpivout0 at acpivideo0: DD1F
cpu0: Enhanced SpeedStep 1097 MHz: speeds: 1101, 1100, 1000, 900, 800, 700, 600 
MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Core 4G Host" rev 0x0b
inteldrm0 at pci0 dev 2 function 0 "Intel HD Graphics" rev 0x0b
drm0 at inteldrm0
inteldrm0: msi
inteldrm0: 1920x1080, 32bpp
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation)
wsdisplay0: screen 1-5 added (std, vt100 emulation)
azalia0 at pci0 dev 3 function 0 "Intel Core 4G HD Audio" rev 0x0b: msi
azalia0: No codecs found
xhci0 at pci0 dev 20 function 0 "Intel 8 Series xHCI" rev 0x04: msi
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "Intel xHCI root hub" rev 3.00/1.00 
addr 1
"Intel 8 Series MEI" rev 0x04 at pci0 dev 22 function 0 not configured
azalia1 at pci0 dev 27 function 0 "Intel 8 Series HD Audio" rev 0x04: msi
azalia1: codecs: Realtek/0x0892
audio0 at azalia1
ppb0 at pci0 dev 28 function 0 "Intel 8 Series PCIE" rev 0xe4
pci1 at ppb0 bus 1
ppb1 at pci0 dev 28 function 2 "Intel 8 Series PCIE" rev 0xe4: msi
pci2 at ppb1 bus 2
iwm0 at pci2 dev 0 function 0 "Intel Dual Band Wireless AC 3160" rev 0x83, msi
ppb2 at pci0 dev 28 function 3 "Intel 8 Series PCIE" rev 0xe4: msi
pci3 at ppb2 bus 3
re0 at pci3 dev 0 function 0 "Realtek 8168" rev 0x07: RTL8168E/8111E-VL 
(0x2c80), msi, address 00:01:2e:65:cb:4c
rgephy0 at re0 phy 7: RTL8169S/8110S/8211 PHY, rev. 5
ppb3 at pci0 dev 28 function 4 "Intel 8 Series PCIE" rev 0xe4: msi
pci4 at ppb3 bus 4
re1 at pci4 dev 0 function 0 "Realtek 8168" rev 0x07: RTL8168E/8111E-VL 
(0x2c80), msi, address 00:01:2e:65:cb:4d
rgephy1 at re1 phy 7: RTL8169S/8110S/8211 PHY, rev. 5
ehci0 at pci0 dev 29 function 0 "Intel 8 Series USB" rev 0x04: apic 8 int 23
usb1 at ehci0: USB revision 2.0
uhub1 at usb1 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 
addr 1
pcib0 at pci0 dev 31 function 0 "Intel 8 Series LPC" rev 0x04
ahci0 at pci0 dev 31 function 2 "Intel 8 Series AHCI" rev 0x04: msi, AHCI 1.3
ahci0: port 0: 3.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, FUJITSU MHZ2320B, 0000> SCSI3 0/direct 
fixed naa.500000e042c613b6
sd0: 305245MB, 512 bytes/sector, 625142448 sectors
ichiic0 at pci0 dev 31 function 3 "Intel 8 Series SMBus" rev 0x04: apic 8 int 18
iic0 at ichiic0
spdmem0 at iic0 addr 0x50: 2GB DDR3 SDRAM PC3-12800 SO-DIMM
spdmem1 at iic0 addr 0x52: 2GB DDR3 SDRAM PC3-12800 SO-DIMM
isa0 at pcib0
isadma0 at isa0
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vmm0 at mainbus0: VMX/EPT
efifb at mainbus0 not configured
uhidev0 at uhub0 port 1 configuration 1 interface 0 "Microsoft Microsoft Wheel 
Mouse Optical\M-." rev 1.10/1.21 addr 2
uhidev0: iclass 3/1
ums0 at uhidev0: 3 buttons, Z dir
wsmouse0 at ums0 mux 0
uhidev1 at uhub0 port 2 configuration 1 interface 0 "Lite-On Technology LG USB 
Keyboard" rev 2.00/1.02 addr 3
uhidev1: iclass 3/1
ukbd0 at uhidev1: 8 variable keys, 6 key codes
wskbd1 at ukbd0 mux 1
wskbd1: connecting to wsdisplay0
umass0 at uhub0 port 3 configuration 1 interface 0 "Generic USB2.0-CRW" rev 
2.00/57.13 addr 4
umass0: using SCSI over Bulk-Only
scsibus2 at umass0: 2 targets, initiator 0
sd1 at scsibus2 targ 1 lun 0: <Generic-, SD/MMC/MS PRO, 1.00> SCSI2 0/direct 
removable serial.0bda0153926571200000
uhidev2 at uhub0 port 5 configuration 1 interface 0 "WACOM ET-0405-UV1.1-1" rev 
1.00/1.11 addr 5
uhidev2: iclass 3/1, 3 report ids
uhid0 at uhidev2 reportid 2: input=7, output=0, feature=2
uhid1 at uhidev2 reportid 3: input=0, output=0, feature=2
uplcom0 at uhub0 port 6 configuration 1 interface 0 "Prolific Technology Inc. 
USB-Serial Controller" rev 1.10/3.00 addr 6
ucom0 at uplcom0
ugen0 at uhub0 port 8 "Intel product 0x07dc" rev 2.00/0.01 addr 7
uhub2 at uhub1 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev 
2.00/0.04 addr 2
vscsi0 at root
scsibus3 at vscsi0: 256 targets
softraid0 at root
scsibus4 at softraid0: 256 targets
root on sd0a (0dd1f62c0924d0ca.a) swap on sd0b dump on sd0b
iwm0: hw rev 0x160, fw ver 16.242414.0, address 34:e6:ad:f5:81:79

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