[BRLTTY] brltty Apex support

[Samuel Thibault]

Hello,

A french user (Cc-ed) is looking for support for his "Apex" device. It
is apparently a successor of the MPower, itself a successor of the
BrailleNote, so it could be that it just reuses the same protocol.
However, see the lsusb -v below.

1c71:c005 would have been HumanWare, but this is c004. Perhaps just a
bit of tuning of the HumanWare driver would be necessary to make Apex
work?

Samuel

Bus 004 Device 006: ID 1c71:c004
Device Descriptor:
   bLength                18
   bDescriptorType         1
   bcdUSB               2.00
   bDeviceClass           32
   bDeviceSubClass         0
   bDeviceProtocol         0
   bMaxPacketSize0        64
   idVendor           0x1c71
   idProduct          0xc004
   bcdDevice            0.90
   iManufacturer           1 HumanWare
   iProduct                2 Apex USB Serial Port
   iSerial                 3 28171312-0031-0000-0000-000000000000
   bNumConfigurations      1
   Configuration Descriptor:
     bLength                 9
     bDescriptorType         2
     wTotalLength           39
     bNumInterfaces          1
     bConfigurationValue     1
     iConfiguration          0
     bmAttributes         0xc0
       Self Powered
     MaxPower                0mA
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        0
       bAlternateSetting       0
       bNumEndpoints           3
       bInterfaceClass         2 Communications
       bInterfaceSubClass    255
       bInterfaceProtocol    255
       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
       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              12
Device Qualifier (for other device speed):
   bLength                10
   bDescriptorType         6
   bcdUSB               2.00
   bDeviceClass           32
   bDeviceSubClass         0
   bDeviceProtocol         0
   bMaxPacketSize0        64
   bNumConfigurations      1
Device Status:     0x0001
   Self Powered