tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 1995-1998 Linus Torvalds & author (see below)
3 */
4
5/*
6 * Principal Author: mlord@pobox.com (Mark Lord)
7 *
8 * See linux/MAINTAINERS for address of current maintainer.
9 *
10 * This file provides support for disabling the buggy read-ahead
11 * mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
12 *
13 * Dunno if this fixes both ports, or only the primary port (?).
14 */
15
16#include <linux/types.h>
17#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/delay.h>
20#include <linux/timer.h>
21#include <linux/mm.h>
22#include <linux/ioport.h>
23#include <linux/blkdev.h>
24#include <linux/hdreg.h>
25#include <linux/pci.h>
26#include <linux/ide.h>
27#include <linux/init.h>
28
29#include <asm/io.h>
30
31static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif)
32{
33 struct pci_dev *dev = to_pci_dev(hwif->dev);
34 u16 reg;
35
36 if (!pci_read_config_word (dev, 0x40, ®) &&
37 !pci_write_config_word(dev, 0x40, reg & 0xdfff)) {
38 printk(KERN_INFO "%s: disabled chipset read-ahead "
39 "(buggy RZ1000/RZ1001)\n", hwif->name);
40 } else {
41 if (hwif->mate)
42 hwif->mate->serialized = hwif->serialized = 1;
43 hwif->drives[0].no_unmask = 1;
44 hwif->drives[1].no_unmask = 1;
45 printk(KERN_INFO "%s: serialized, disabled unmasking "
46 "(buggy RZ1000/RZ1001)\n", hwif->name);
47 }
48}
49
50static const struct ide_port_info rz1000_chipset __devinitdata = {
51 .name = "RZ100x",
52 .init_hwif = init_hwif_rz1000,
53 .chipset = ide_rz1000,
54 .host_flags = IDE_HFLAG_NO_DMA | IDE_HFLAG_BOOTABLE,
55};
56
57static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id)
58{
59 return ide_setup_pci_device(dev, &rz1000_chipset);
60}
61
62static const struct pci_device_id rz1000_pci_tbl[] = {
63 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), 0 },
64 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), 0 },
65 { 0, },
66};
67MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl);
68
69static struct pci_driver driver = {
70 .name = "RZ1000_IDE",
71 .id_table = rz1000_pci_tbl,
72 .probe = rz1000_init_one,
73};
74
75static int __init rz1000_ide_init(void)
76{
77 return ide_pci_register_driver(&driver);
78}
79
80module_init(rz1000_ide_init);
81
82MODULE_AUTHOR("Andre Hedrick");
83MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
84MODULE_LICENSE("GPL");
85