mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-26 12:20:50 +07:00
2bfba3c444
Suggested-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
86 lines
2.2 KiB
C
86 lines
2.2 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/pci.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/init.h>
|
|
|
|
#define DRV_NAME "rz1000"
|
|
|
|
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, ®) &&
|
|
!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 = DRV_NAME,
|
|
.init_hwif = init_hwif_rz1000,
|
|
.chipset = ide_rz1000,
|
|
.host_flags = IDE_HFLAG_NO_DMA,
|
|
};
|
|
|
|
static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id)
|
|
{
|
|
return ide_pci_init_one(dev, &rz1000_chipset, NULL);
|
|
}
|
|
|
|
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 rz1000_pci_driver = {
|
|
.name = "RZ1000_IDE",
|
|
.id_table = rz1000_pci_tbl,
|
|
.probe = rz1000_init_one,
|
|
.remove = ide_pci_remove,
|
|
};
|
|
|
|
static int __init rz1000_ide_init(void)
|
|
{
|
|
return ide_pci_register_driver(&rz1000_pci_driver);
|
|
}
|
|
|
|
static void __exit rz1000_ide_exit(void)
|
|
{
|
|
pci_unregister_driver(&rz1000_pci_driver);
|
|
}
|
|
|
|
module_init(rz1000_ide_init);
|
|
module_exit(rz1000_ide_exit);
|
|
|
|
MODULE_AUTHOR("Andre Hedrick");
|
|
MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
|
|
MODULE_LICENSE("GPL");
|
|
|