[parisc-linux] ns87415 (superio) support for 2.6.x

[Joel Soete]

Hi Randolph,

> This patch fixes ns87415 to work on suckyio-based boxes. the device
> reports that dma is enabled, but from the performance we get it 
>looks like something is still not quite right (we only see ~3MB/s)
>
>Patch is against 2.6.4-rc3-pa5....  tested on c3000 and c3750. 
>(Thanks Max.)

I just build the new 2.6.4-rc-pa6 (in which this patch is included also if
i didn't miss anything?) and boot it successfully on my b2k. Any way I noticed
a 'kernel bug()' in dmesg:

Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
kernel BUG at include/asm/ide.h:30!
Kernel addresses on the stack:
 [<10124bf8>] printk+0x188/0x1c8
 [<101036b8>] dump_stack+0x18/0x24
 [<1023e6dc>] init_hwif_data+0xd0/0x2e8
 [<101eaac4>] create_dir+0x4c/0x64
 [<104385bc>] init_ide_data+0x44/0x58
 [<10438fb0>] ide_init+0x44/0x80
 [<1042c780>] do_initcalls+0x58/0xf8
 [<101001d0>] init+0x28/0xd4
 [<10109c5c>] ret_from_kernel_thread+0x1c/0x24

kernel BUG at include/asm/ide.h:30!
Kernel addresses on the stack:
 [<10124bf8>] printk+0x188/0x1c8
 [<101036b8>] dump_stack+0x18/0x24
 [<1023e6dc>] init_hwif_data+0xd0/0x2e8
 [<101eaac4>] create_dir+0x4c/0x64
 [<104385c4>] init_ide_data+0x4c/0x58
 [<10438fb0>] ide_init+0x44/0x80
 [<1042c780>] do_initcalls+0x58/0xf8
 [<101001d0>] init+0x28/0xd4
 [<10109c5c>] ret_from_kernel_thread+0x1c/0x24

NS87415: IDE controller at PCI slot 0000:00:0e.0
NS87415: chipset revision 3
NS87415: 100% native mode on irq 103
    ide0: BM-DMA at 0x0900-0x0907, BIOS settings: hda:DMA, hdb:DMA
    ide1: BM-DMA at 0x0908-0x090f, BIOS settings: hdc:DMA, hdd:DMA
hda: LTN485S, ATAPI CD/DVD-ROM drive
Using anticipatory io scheduler
ide0 at 0xe00-0xe07,0xd02 on irq 103
hda: ATAPI 48X CD-ROM drive, 120kB Cache
Uniform CD-ROM driver Revision: 3.20


Thanks for your help,
    Joel

PS: this b2k is only equiped with a simple (readonly :O ) ide cdrom drive


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