My db1500 usb works in LE mode. In BE mode it does not. Below is
the first problem I've seen (may not be the first/only problem).
This is a 2.4.18 kernel.
This problem shows up in sohci_submit_urb(), but looks like it is caused
by FILL_CONTROL_URB(). Since FILL_CONTROL_URB() is depreciated I've
also tried its replacement usb_fill_control_urb() with no difference.
This is generic usb/ohci code. Isn't this code already le/be safe?
Shouldn't this just work?
The au1500 hardware has a bit that will "swap usb data but not ohci
control structs". I see this same problem with that bit set or clear.
Not sure if hcca->frame_no is considered an ohci control struct or
usb data, but since it doesn't seam to be swapped when I change the
bit, I'm guessing it is probably considered a control struct.
Any thoughts on what I might be missing here?
Here is the le/be diff:
< hcc[32]:0xa02bd080=0x00000a1d
---
> hcc[32]:0xa02bd080=0x00000a1c
...
< frame_no = (x1=0x0d57,x2=0x0d57,x3=0x0d57)
< frame_no = (y1=0x00000d57,y2=0x00000d57,y3=0x00000d57)
< ...URB:[ d92] dev: 0,ep: 0-O,type:CTRL,flags: 0,len:0/0,stat:0(0)
---
> frame_no = (x1=0x0000,x2=0x0000,x3=0x0000)
> frame_no = (y1=0x00000000,y2=0x00000000,y3=0x00000d56)
> #...URB:[ 0] dev: 0,ep: 0-O,type:CTRL,flags: 0,len:0/0,stat:0(0)
The above output comes from this patch to sohci_get_current_frame_number():
<
< return le16_to_cpu (ohci->hcca->frame_no);
---
> u16 x1, x2, x3;
> u32 y1, y2, y3;
>
> {
> u32 i, l;
> u32* p;
> l = sizeof(struct ohci_hcca)/4;
> p = ohci->hcca;
> for ( i = 0; i < l; i++ )
> {
> printk( "hcc[%02d]:0x%08x=0x%08x\n",
> i, p, *p );
> p++;
> }
> }
>
> x1 = ohci->hcca->frame_no;
> x2 = le16_to_cpu(x1);
> x3 = ((u16*)ohci->hcca)[64];
>
> y1 = ohci->hcca->frame_no;
> y2 = le32_to_cpu(y1);
> y3 = ((u32*)ohci->hcca)[32];
>
> printk( "frame_no = (x1=0x%04x,x2=0x%04x,x3=0x%04x)\n",x1,x2,x3 );
> printk( "frame_no = (y1=0x%08x,y2=0x%08x,y3=0x%08x)\n",y1,y2,y3 );
>
> return le16_to_cpu(ohci->hcca->frame_no);
