1/*
2 *  linux/drivers/ide/pci/rz1000.c	Version 0.06	January 12, 2003
3 *
4 *  Copyright (C) 1995-1998  Linus Torvalds & author (see below)
5 */
6
7/*
8 *  Principal Author:  mlord@pobox.com (Mark Lord)
9 *
10 *  See linux/MAINTAINERS for address of current maintainer.
11 *
12 *  This file provides support for disabling the buggy read-ahead
13 *  mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
14 *
15 *  Dunno if this fixes both ports, or only the primary port (?).
16 */
17
18#include <linux/types.h>
19#include <linux/module.h>
20#include <linux/kernel.h>
21#include <linux/delay.h>
22#include <linux/timer.h>
23#include <linux/mm.h>
24#include <linux/ioport.h>
25#include <linux/blkdev.h>
26#include <linux/hdreg.h>
27#include <linux/pci.h>
28#include <linux/ide.h>
29#include <linux/init.h>
30
31#include <asm/io.h>
32
33static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif)
34{
35	u16 reg;
36	struct pci_dev *dev = hwif->pci_dev;
37
38	hwif->chipset = ide_rz1000;
39	if (!pci_read_config_word (dev, 0x40, &reg) &&
40	    !pci_write_config_word(dev, 0x40, reg & 0xdfff)) {
41		printk(KERN_INFO "%s: disabled chipset read-ahead "
42			"(buggy RZ1000/RZ1001)\n", hwif->name);
43	} else {
44		hwif->serialized = 1;
45		hwif->drives[0].no_unmask = 1;
46		hwif->drives[1].no_unmask = 1;
47		printk(KERN_INFO "%s: serialized, disabled unmasking "
48			"(buggy RZ1000/RZ1001)\n", hwif->name);
49	}
50}
51
52static ide_pci_device_t rz1000_chipset __devinitdata = {
53	.name		= "RZ100x",
54	.init_hwif	= init_hwif_rz1000,
55	.channels	= 2,
56	.autodma	= NODMA,
57	.bootable	= ON_BOARD,
58};
59
60static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id)
61{
62	return ide_setup_pci_device(dev, &rz1000_chipset);
63}
64
65static struct pci_device_id rz1000_pci_tbl[] = {
66	{ PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
67	{ PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
68	{ 0, },
69};
70MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl);
71
72static struct pci_driver driver = {
73	.name		= "RZ1000_IDE",
74	.id_table	= rz1000_pci_tbl,
75	.probe		= rz1000_init_one,
76};
77
78static int __init rz1000_ide_init(void)
79{
80	return ide_pci_register_driver(&driver);
81}
82
83module_init(rz1000_ide_init);
84
85MODULE_AUTHOR("Andre Hedrick");
86MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
87MODULE_LICENSE("GPL");
88