I thought there was already a firmware loading feature in the 2.6 kernels.
Did you look?
On Thu, 13 May 2004, Patrick Boettcher wrote:
> Hello list,
>
> I'm currently working on a driver for a USB-DVB device (VP-7041). This
> device needs to be initialized by a firmware. Peter Schildmann wrote a
> user-level (libusb) programm to load the firmware to the device. I wanted
> to convert this small program to kernelspace. Everything works like
> expected so far, except that the the firmware does not want to go to the
> device:
>
> Peters programm does the following to load the firmware:
>
> /* init stuff */
> for(i = 0; i < s.st_size; i += 22) {
> b = &firmware[i];
> addr = ((u_int16_t) b[3]) | ((u_int16_t) b[4] << 8);
>
> ret = usb_control_msg(usb, USB_TYPE_VENDOR, 0xa0, addr, 0x0,
> &b[6], b[1], 500);
>
> if (ret != b[1]) {
> fprintf(stderr, "Firmware download failed\n");
> exit(1);
> }
> }
>
> This works.
>
> I wrote this part like this:
>
> for(i = 0; i < fw->size; i += 22) {
> b = &fw->data[i];
> addr = ((__u16) b[3]) | ((__u16) b[4] << 8);
>
> retval = usb_control_msg(dev, usb_sndctrlpipe(dev,0),
> 0xa0, USB_TYPE_VENDOR,addr, 0x0, &b[6],
> b[1], (50000 * HZ + 999) / 1000);
>
> if (retval != b[1]) {
> err("Error while transferring firmware (transferred size: "
> "%d, block size: %d)",retval,b[1]);
> break;
> }
> }
>
> When running this code following messages appear in syslog:
>
> kernel: uhci_hcd 0000:00:1d.1: host system error, PCI problems?
> kernel: uhci_hcd 0000:00:1d.1: host controller halted, very bad!
> kernel: usb 2-1: control timeout on ep0out
>
> Not good at all I think...
>
> I think the problem is the usb_sndctrlpipe, I would appreciate if someone
> could point me in the right direction.
>
> USBSnoop in Windows show this dialog for the firmware loading sequence:
>
>
> --- snip --
> [36 ms] UsbSnoop - MyDispatchInternalIOCTL(f9417e80) : fdo=829965f0,
> Irp=82983510, IRQL=0
> [36 ms] >>> URB 4 going down >>>
> -- URB_FUNCTION_VENDOR_DEVICE:
> TransferFlags = 00000000 (USBD_TRANSFER_DIRECTION_OUT,
> ~USBD_SHORT_TRANSFER_OK)
> TransferBufferLength = 00000010
> TransferBuffer = f94290fb
> TransferBufferMDL = 00000000
> 00000000: f5 1c 13 92 01 d2 e8 90 7f ab 74 ff f0 90 7f a9
> UrbLink = 00000000
> RequestTypeReservedBits = 00000000
> Request = 000000a0
> Value = 0000147c
> Index = 00000000
> [40 ms] UsbSnoop - MyInternalIOCTLCompletion(f9417db0) : fido=00000000,
> Irp=82983510, Context=82782930, IRQL=2
> [40 ms] <<< URB 4 coming back <<<
> -- URB_FUNCTION_CONTROL_TRANSFER:
> PipeHandle = 82a0b978
> TransferFlags = 0000000a (USBD_TRANSFER_DIRECTION_OUT,
> USBD_SHORT_TRANSFER_OK)
> TransferBufferLength = 00000010
> TransferBuffer = f94290fb
> TransferBufferMDL = 829d2c90
> UrbLink = 00000000
> SetupPacket =
> 00000000: 40 a0 7c 14 00 00 10 00
> [40 ms] UsbSnoop - DispatchAny(f9416610) : IRP_MJ_INTERNAL_DEVICE_CONTROL
> --- snip --
>
> This part is repeated 601 times, with different TransferBufferMDL's of
> course.
>
> If more information is required, please ask, I'd loved to give.
>
> I'm also not sure if this is the correct ml, but linux-usb-devel sounds
> more like usb core...
>
> Thanks a log in advance.
>
> best regards,
> Patrick
>
>
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