2 * linux/drivers/ide/pci/rz1000.c Version 0.06 January 12, 2003
4 * Copyright (C) 1995-1998 Linus Torvalds & author (see below)
8 * Principal Author: mlord@pobox.com (Mark Lord)
10 * See linux/MAINTAINERS for address of current maintainer.
12 * This file provides support for disabling the buggy read-ahead
13 * mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
15 * Dunno if this fixes both ports, or only the primary port (?).
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>
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>
33 static void __devinit
init_hwif_rz1000 (ide_hwif_t
*hwif
)
36 struct pci_dev
*dev
= hwif
->pci_dev
;
38 hwif
->chipset
= ide_rz1000
;
39 if (!pci_read_config_word (dev
, 0x40, ®
) &&
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
);
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
);
52 static ide_pci_device_t rz1000_chipset __devinitdata
= {
54 .init_hwif
= init_hwif_rz1000
,
55 .host_flags
= IDE_HFLAG_NO_DMA
| IDE_HFLAG_BOOTABLE
,
58 static int __devinit
rz1000_init_one(struct pci_dev
*dev
, const struct pci_device_id
*id
)
60 return ide_setup_pci_device(dev
, &rz1000_chipset
);
63 static const struct pci_device_id rz1000_pci_tbl
[] = {
64 { PCI_VDEVICE(PCTECH
, PCI_DEVICE_ID_PCTECH_RZ1000
), 0 },
65 { PCI_VDEVICE(PCTECH
, PCI_DEVICE_ID_PCTECH_RZ1001
), 0 },
68 MODULE_DEVICE_TABLE(pci
, rz1000_pci_tbl
);
70 static struct pci_driver driver
= {
72 .id_table
= rz1000_pci_tbl
,
73 .probe
= rz1000_init_one
,
76 static int __init
rz1000_ide_init(void)
78 return ide_pci_register_driver(&driver
);
81 module_init(rz1000_ide_init
);
83 MODULE_AUTHOR("Andre Hedrick");
84 MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
85 MODULE_LICENSE("GPL");