Re: problem with converting from at91_spi to atmel_spi (AT91RM9200)

[Ivan Kuten <ivan.kuten-NihHnkIkDZhBDgjK7y7TUQ@public.gmane.org>]

On Fri, 25 May 2007 17:55:02 +0200
Haavard Skinnemoen wrote:

> 
> Hmm...not too surprising really. Could you add a call to show_state()
> as well? I suspect it will just show init waiting for completion in
> spi_sync() though.
> 

Haavard, log with show_state() is attached, seems you are right it's waiting for completion.

[<c017f040>] (schedule+0x0/0x750) from [<c017f83c>] (wait_for_completion+0xac/0x110)
[<c017f790>] (wait_for_completion+0x0/0x110) from [<c0120018>] (spi_sync+0x54/0x68)
 r6:00000000 r5:c0405c78 r4:c0405c00
[<c011ffc4>] (spi_sync+0x0/0x68) from [<c0120170>] (spi_write_then_read+0x144/0x204)
 r7:c01eb978 r6:c0405c78 r5:c06aa6e0 r4:00000001
[<c012002c>] (spi_write_then_read+0x0/0x204) from [<c011f664>] (dataflash_probe+0x6c/0x244)
[<c011f5f8>] (dataflash_probe+0x0/0x244) from [<c011f99c>] (spi_drv_probe+0x3c/0x48)
 r6:c01eb634 r5:00000000 r4:c03ea200
[<c011f960>] (spi_drv_probe+0x0/0x48) from [<c0104e7c>] (driver_probe_device+0xe8/0x18c)
 r4:c03ea200
[<c0104d94>] (driver_probe_device+0x0/0x18c) from [<c0104f30>] (__device_attach+0x10/0x14)


> What might be more interesting is a dump of the contents of the SPI
> controller registers, i.e. something like this:
> 
> 	void *p;
> 	int i;
> 
> 	p = ioremap(0xfffe0000);
> 	for (i = 0; i < 0x100; i += 16)
> 		printk("%04x: %08x %08x %08x %08x\n", i,
> 			readl(p + i), readl(p + i + 4),
> 			readl(p + i + 8), readl(p + i + 12));
> 	iounmap(p);
> 

Here is dump of SPI regs:

Power!
0000: 00000000 000e0011 00000000 00000000
0010: 000100a0 00000000 00000000 00000018
0020: 00000000 00000000 00000000 00000000
0030: 0a0a0202 00000000 00000000 00000000
0040: 00000000 00000000 00000000 00000000
0050: 00000000 00000000 00000000 00000000
0060: 00000000 00000000 00000000 00000000
0070: 00000000 00000000 00000000 00000000
0080: 00000000 00000000 00000000 00000000
0090: 00000000 00000000 00000000 00000000
00a0: 00000000 00000000 00000000 00000000
00b0: 00000000 00000000 00000000 00000000
00c0: 00000000 00000000 00000000 00000000
00d0: 00000000 00000000 00000000 00000000
00e0: 00000000 00000000 00000000 00000000
00f0: 00000000 00000000 00000000 00000000

P.S. I placed ioremap outside irq handler, otherwise it complains
kernel BUG at mm/vmalloc.c:171!
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c0004000
[00000000] *pgd=00000000

BR, 
Ivan

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