On Sat, 8 Dec 2007 15:55:06 +0000 Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> wrote:
> Rework the pata_legacy driver to have an internal way to plug multiple legacy interface types
> and designs into the driver.
>
> This driver supports
> - Generic legacy ISA on primary/secondary and tertiary ports
> - BIOS or jumper configured legacy ports
> - VLB controllers that snoop the mode set for PIO
> (Cirrus CLPD7220, Adaptec AIC25VL01)
> - Promise PDC20230
> - Holtek 6560A/B
> - Opti VLB controllers
> - QDI 6500/6580/6580DP controllers
>
> The new driver also adds an "all" option so you can load all the PCI drivers you have, decide you have
> a controller that is totally unknown and then load pata_legacy all=1 to grab the primary/secondary ports
> as a last resort fallback.
>
> TODO:
> Add ST412 support (needs some kind of geometry hook in libata core code)
> Winbond W83759A in programmable mode (aka DTC2278)
> Find more insane VLB controllers to support
>
> This driver obsoletes pata_qdi, which can go once this is settled in.
>
Is this patch going to screw my kernel up?
> +static __init void probe_opti_vlb(void)
> +{
> + /* If an OPTI 82C46X is present find out where the channels are */
> + static const char *optis[4] = {
> + "3/463MV", "5MV",
> + "5MVA", "5MVB"
> + };
> + u8 chans = 1;
> + u8 ctrl = (opti_syscfg(0x30) & 0xC0) >> 6;
> +
> + opti82c46x = 3; /* Assume master and slave first */
> + printk(KERN_INFO DRV_NAME ": Opti 82C46%s chipset support.\n",
> + optis[ctrl]);
> + if (ctrl == 3)
> + chans = (opti_syscfg(0x3F) & 0x20) ? 2 : 1;
this could be
if (ctrl == 3 && (opti_syscfg(0x3F) & 0x20))
chans = 2;
if that's any clearer...
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