kernel-ark/drivers/ide/pci/rz1000.c
Bartlomiej Zolnierkiewicz 807b90d0be ide: add IDE_HFLAG_NO_{IO32_BIT,UNMASK_IRQS} host flags
* Use the same bit for IDE_HFLAG_CS5520 and IDE_HFLAG_VDMA host flags
  (both are used only by cs5520 host driver currently).

* Add IDE_HFLAG_NO_IO32_BIT host flag and use it instead of ->no_io_32bit
  ide_hwif_t field.

* Add IDE_HFLAG_NO_UNMASK_IRQS host flag, then convert dtc2278 and rz1000
  host drivers to use it.

There should be no functionality changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
2008-02-02 19:56:40 +01:00

78 lines
2.0 KiB
C

/*
* Copyright (C) 1995-1998 Linus Torvalds & author (see below)
*/
/*
* Principal Author: mlord@pobox.com (Mark Lord)
*
* See linux/MAINTAINERS for address of current maintainer.
*
* This file provides support for disabling the buggy read-ahead
* mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
*
* Dunno if this fixes both ports, or only the primary port (?).
*/
#include <linux/types.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/hdreg.h>
#include <linux/pci.h>
#include <linux/ide.h>
#include <linux/init.h>
static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
u16 reg;
if (!pci_read_config_word (dev, 0x40, &reg) &&
!pci_write_config_word(dev, 0x40, reg & 0xdfff)) {
printk(KERN_INFO "%s: disabled chipset read-ahead "
"(buggy RZ1000/RZ1001)\n", hwif->name);
} else {
if (hwif->mate)
hwif->mate->serialized = hwif->serialized = 1;
hwif->host_flags |= IDE_HFLAG_NO_UNMASK_IRQS;
printk(KERN_INFO "%s: serialized, disabled unmasking "
"(buggy RZ1000/RZ1001)\n", hwif->name);
}
}
static const struct ide_port_info rz1000_chipset __devinitdata = {
.name = "RZ100x",
.init_hwif = init_hwif_rz1000,
.chipset = ide_rz1000,
.host_flags = IDE_HFLAG_NO_DMA | IDE_HFLAG_BOOTABLE,
};
static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
return ide_setup_pci_device(dev, &rz1000_chipset);
}
static const struct pci_device_id rz1000_pci_tbl[] = {
{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), 0 },
{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), 0 },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl);
static struct pci_driver driver = {
.name = "RZ1000_IDE",
.id_table = rz1000_pci_tbl,
.probe = rz1000_init_one,
};
static int __init rz1000_ide_init(void)
{
return ide_pci_register_driver(&driver);
}
module_init(rz1000_ide_init);
MODULE_AUTHOR("Andre Hedrick");
MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
MODULE_LICENSE("GPL");