linux-kernel - Re: Using s3virge card in Sun Blade 2000

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Date:	Thu, 06 Jan 2011 00:33:49 +0000
From:	Alex Buell <alex.buell@...ted.org.uk>
To:	David Miller <davem@...emloft.net>
Cc:	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Using s3virge card in Sun Blade 2000

On Wed, 2011-01-05 at 21:13 +0000, Alex Buell wrote:

> > Then replace all NULL vga_*() initial arguments in the driver
> > with par->vga_iobase. 
> 
> No wonder it was crashing, there was nothing to access with region 1! I
> will do as you suggest, and see if it works. Thank you!

After doing as you suggested:

	printk(KERN_INFO "s3fb: vga io base = 0x%p\n", par->vga_iobase);

        /* Unlock regs */
        cr38 = vga_rcrt(par->vga_iobase, 0x38);
        cr39 = vga_rcrt(par->vga_iobase, 0x39);
        vga_wseq(par->vga_iobase, 0x08, 0x06);
        vga_wcrt(par->vga_iobase, 0x38, 0x48);
        vga_wcrt(par->vga_iobase, 0x39, 0xA5);

        printk(KERN_INFO "s3fb ok...\n");

The above code seems to work, and crashes after this point:

   	/* Identify chip type */
        par->chip = id->driver_data & CHIP_MASK;
        par->rev = vga_rcrt(par->vga_iobase, 0x2f);
        if (par->chip & CHIP_UNDECIDED_FLAG)
                par->chip = s3_identification(par->chip);

The logs shows:

Jan  5 23:16:29 sodium kernel: s3fb: vga io base = 0x000007ffef000000
Jan  5 23:16:29 sodium kernel: s3fb ok...
Jan  5 23:16:29 sodium kernel: ERROR(0): Cheetah error trap taken
afsr[0030100000000000] afar[00000000000003d0] TL1(0)
Jan  5 23:16:29 sodium kernel: ERROR(0): TPC[10583b54] TNPC[10583b58]
O7[10583a3c] TSTATE[9911001606]
Jan  5 23:16:29 sodium kernel: ERROR(0): TPC<s3_pci_probe+0x410/0x93c
[s3fb]>
Jan  5 23:16:29 sodium kernel: ERROR(0): M_SYND(0),  E_SYND(0), Multiple
Errors, Privileged
Jan  5 23:16:29 sodium kernel: ERROR(0): Highest priority error
(0000100000000000) "Unmapped error from system bus"
Jan  5 23:16:29 sodium kernel: ERROR(0): D-cache idx[0]
tag[0000000000000000] utag[0000000000000000] stag[0000000000000000]
Jan  5 23:16:29 sodium kernel: ERROR(0): D-cache data0[0000000000000000]
data1[0000000000000000] data2[0000000000000000] data3[0000000000000000]
Jan  5 23:16:29 sodium kernel: ERROR(0): I-cache idx[0]
tag[0000000000000000] utag[0000000000000000] stag[0000000000000000]
u[0000000000000000] l[0000000000000000]
Jan  5 23:16:29 sodium kernel: ERROR(0): I-cache INSN0[0000000000000000]
INSN1[0000000000000000] INSN2[0000000000000000] INSN3[0000000000000000]
Jan  5 23:16:29 sodium kernel: ERROR(0): I-cache INSN4[0000000000000000]
INSN5[0000000000000000] INSN6[0000000000000000] INSN7[0000000000000000]
Jan  5 23:16:29 sodium kernel: ERROR(0): E-cache idx[3c0]
tag[0000000002249249]
Jan  5 23:16:29 sodium kernel: ERROR(0): E-cache data0[787072745f756e72]
data1[656769737465725f] data2[7472616e73706f72] data3[7400787072745f72]
Jan  5 23:16:29 sodium kernel: Kernel panic - not syncing: Irrecoverable
deferred error trap.

I'm still thinking that it probably isn't the right io_base if it's
crashing trying to identify the s3 chipset. 
-- 
Tactical Nuclear Kittens
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