[Line6linux-devel] POD HD500

[Sébastien C. <nes...@gm...>]

Hello there.

First of I have to apologize for the previous spam my mail sended.
That won't happen again.

Then you'll find a patch for HD500.
Unfortunatelly it doesn't make it fully work, but I think it get closer.

There's 2 interfaces and that should work like PODXT Live :

- An Isochronous interface (AUDIO):
Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        0
     bAlternateSetting       1
     bNumEndpoints           2
     bInterfaceClass       255 Vendor Specific Class
     bInterfaceSubClass    255 Vendor Specific Subclass
     bInterfaceProtocol    255 Vendor Specific Protocol
     iInterface              3 Audio
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x02  EP 2 OUT
       bmAttributes            1
         Transfer Type            Isochronous
         Synch Type               None
         Usage Type               Data
       wMaxPacketSize     0x002e  1x 46 bytes
       bInterval               1
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x86  EP 6 IN
       bmAttributes            1
         Transfer Type            Isochronous
         Synch Type               None
         Usage Type               Data
       wMaxPacketSize     0x002e  1x 46 bytes
       bInterval               1

- A Bulk interface (VARIAX):
   Interface Descriptor:
     bLength                 9
     bDescriptorType         4
     bInterfaceNumber        1
     bAlternateSetting       0
     bNumEndpoints           2
     bInterfaceClass       255 Vendor Specific Class
     bInterfaceSubClass    255 Vendor Specific Subclass
     bInterfaceProtocol    255 Vendor Specific Protocol
     iInterface              4 User
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x01  EP 1 OUT
       bmAttributes            2
         Transfer Type            Bulk
         Synch Type               None
         Usage Type               Data
       wMaxPacketSize     0x0040  1x 64 bytes
       bInterval               1
     Endpoint Descriptor:
       bLength                 7
       bDescriptorType         5
       bEndpointAddress     0x81  EP 1 IN
       bmAttributes            2
         Transfer Type            Bulk
         Synch Type               None
         Usage Type               Data
       wMaxPacketSize     0x0040  1x 64 bytes
       bInterval               1


With this patch I think I managed to make VARIAX one to work, but as I
don't have a VARIAX guitar I can't tell.
By the way, for people who has a VARIAX device working with this
driver , what it is supposed to do ?:
Does it creates an ALSA device (look like it) or is it DATA transfer
only (commands for software + MIDI )?

I didn't managed to get the Isochronous (AUDIO) interface up and
running for now , but I'm on it.
I get an -EINVAL on the usb_submit_urb function in line6_start_listen
(driver.c:134).
Here's what I get in the logs :

Jun  8 12:30:26 NELL kernel: line6usb 5-2:1.0: Line6 POD HD500 found
Jun  8 12:30:26 NELL kernel: line6usb 5-2:1.0: line6_probe:
usb_submit_urb failed
Jun  8 12:30:26 NELL kernel: line6usb: probe of 5-2:1.0 failed with error -22
Jun  8 12:30:26 NELL kernel: line6usb 5-2:1.1: Line6 POD HD500 found
Jun  8 12:30:26 NELL kernel: line6usb 5-2:1.1: Line6 POD HD500 now attached
Jun  8 12:30:26 NELL kernel: usbcore: registered new interface driver line6usb
Jun  8 17:43:17 NELL kernel: line6usb 5-2:1.1: S0000: F0 7E 7F 06 01
F7       .~....
Jun  8 17:43:17 NELL kernel: line6usb 5-2:1.1: S0000: F0 7E 7F 06 01
F7       .~....
Jun  8 17:43:17 NELL kernel: line6usb 5-2:1.1: S0000: F0 7E 7F 06 01
F7       .~....
Jun  8 17:43:17 NELL kernel: line6usb 5-2:1.1: S0000: F0 7E 7F 06 01
F7       .~....
(...)






Best Regards
--
CAPOU Sébastien