2 * Copyright (C) 1995-1998 Linus Torvalds & author (see below)
6 * Principal Author: mlord@pobox.com (Mark Lord)
8 * See linux/MAINTAINERS for address of current maintainer.
10 * This file provides support for disabling the buggy read-ahead
11 * mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
13 * Dunno if this fixes both ports, or only the primary port (?).
16 #include <linux/types.h>
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/hdreg.h>
20 #include <linux/pci.h>
21 #include <linux/ide.h>
22 #include <linux/init.h>
24 #define DRV_NAME "rz1000"
26 static void __devinit
init_hwif_rz1000 (ide_hwif_t
*hwif
)
28 struct pci_dev
*dev
= to_pci_dev(hwif
->dev
);
31 if (!pci_read_config_word (dev
, 0x40, ®
) &&
32 !pci_write_config_word(dev
, 0x40, reg
& 0xdfff)) {
33 printk(KERN_INFO
"%s: disabled chipset read-ahead "
34 "(buggy RZ1000/RZ1001)\n", hwif
->name
);
37 hwif
->mate
->serialized
= hwif
->serialized
= 1;
38 hwif
->host_flags
|= IDE_HFLAG_NO_UNMASK_IRQS
;
39 printk(KERN_INFO
"%s: serialized, disabled unmasking "
40 "(buggy RZ1000/RZ1001)\n", hwif
->name
);
44 static const struct ide_port_info rz1000_chipset __devinitdata
= {
46 .init_hwif
= init_hwif_rz1000
,
47 .chipset
= ide_rz1000
,
48 .host_flags
= IDE_HFLAG_NO_DMA
,
51 static int __devinit
rz1000_init_one(struct pci_dev
*dev
, const struct pci_device_id
*id
)
53 return ide_pci_init_one(dev
, &rz1000_chipset
, NULL
);
56 static const struct pci_device_id rz1000_pci_tbl
[] = {
57 { PCI_VDEVICE(PCTECH
, PCI_DEVICE_ID_PCTECH_RZ1000
), 0 },
58 { PCI_VDEVICE(PCTECH
, PCI_DEVICE_ID_PCTECH_RZ1001
), 0 },
61 MODULE_DEVICE_TABLE(pci
, rz1000_pci_tbl
);
63 static struct pci_driver driver
= {
65 .id_table
= rz1000_pci_tbl
,
66 .probe
= rz1000_init_one
,
67 .remove
= ide_pci_remove
,
70 static int __init
rz1000_ide_init(void)
72 return ide_pci_register_driver(&driver
);
75 static void __exit
rz1000_ide_exit(void)
77 pci_unregister_driver(&driver
);
80 module_init(rz1000_ide_init
);
81 module_exit(rz1000_ide_exit
);
83 MODULE_AUTHOR("Andre Hedrick");
84 MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
85 MODULE_LICENSE("GPL");