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/pci.h>
20#include <linux/ide.h>
21#include <linux/init.h>
22
23#define DRV_NAME "rz1000"
24
25static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif)
26{
27 struct pci_dev *dev = to_pci_dev(hwif->dev);
28 u16 reg;
29
30 if (!pci_read_config_word (dev, 0x40, ®) &&
31 !pci_write_config_word(dev, 0x40, reg & 0xdfff)) {
32 printk(KERN_INFO "%s: disabled chipset read-ahead "
33 "(buggy RZ1000/RZ1001)\n", hwif->name);
34 } else {
35 if (hwif->mate)
36 hwif->mate->serialized = hwif->serialized = 1;
37 hwif->host_flags |= IDE_HFLAG_NO_UNMASK_IRQS;
38 printk(KERN_INFO "%s: serialized, disabled unmasking "
39 "(buggy RZ1000/RZ1001)\n", hwif->name);
40 }
41}
42
43static const struct ide_port_info rz1000_chipset __devinitdata = {
44 .name = DRV_NAME,
45 .init_hwif = init_hwif_rz1000,
46 .chipset = ide_rz1000,
47 .host_flags = IDE_HFLAG_NO_DMA,
48};
49
50static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id)
51{
52 return ide_pci_init_one(dev, &rz1000_chipset, NULL);
53}
54
55static const struct pci_device_id rz1000_pci_tbl[] = {
56 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), 0 },
57 { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), 0 },
58 { 0, },
59};
60MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl);
61
62static struct pci_driver rz1000_pci_driver = {
63 .name = "RZ1000_IDE",
64 .id_table = rz1000_pci_tbl,
65 .probe = rz1000_init_one,
66 .remove = ide_pci_remove,
67};
68
69static int __init rz1000_ide_init(void)
70{
71 return ide_pci_register_driver(&rz1000_pci_driver);
72}
73
74static void __exit rz1000_ide_exit(void)
75{
76 pci_unregister_driver(&rz1000_pci_driver);
77}
78
79module_init(rz1000_ide_init);
80module_exit(rz1000_ide_exit);
81
82MODULE_AUTHOR("Andre Hedrick");
83MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
84MODULE_LICENSE("GPL");
85