linux/drivers/ide/pci/rz1000.c
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   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        if (!pci_read_config_word (dev, 0x40, &reg) &&
  39            !pci_write_config_word(dev, 0x40, reg & 0xdfff)) {
  40                printk(KERN_INFO "%s: disabled chipset read-ahead "
  41                        "(buggy RZ1000/RZ1001)\n", hwif->name);
  42        } else {
  43                if (hwif->mate)
  44                        hwif->mate->serialized = 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 const struct ide_port_info rz1000_chipset __devinitdata = {
  53        .name           = "RZ100x",
  54        .init_hwif      = init_hwif_rz1000,
  55        .chipset        = ide_rz1000,
  56        .host_flags     = IDE_HFLAG_NO_DMA | IDE_HFLAG_BOOTABLE,
  57};
  58
  59static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id)
  60{
  61        return ide_setup_pci_device(dev, &rz1000_chipset);
  62}
  63
  64static const struct pci_device_id rz1000_pci_tbl[] = {
  65        { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), 0 },
  66        { PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), 0 },
  67        { 0, },
  68};
  69MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl);
  70
  71static struct pci_driver driver = {
  72        .name           = "RZ1000_IDE",
  73        .id_table       = rz1000_pci_tbl,
  74        .probe          = rz1000_init_one,
  75};
  76
  77static int __init rz1000_ide_init(void)
  78{
  79        return ide_pci_register_driver(&driver);
  80}
  81
  82module_init(rz1000_ide_init);
  83
  84MODULE_AUTHOR("Andre Hedrick");
  85MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
  86MODULE_LICENSE("GPL");
  87
  88
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