drivers/ide/pci/rz1000.c

   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 #undef REALLY_SLOW_IO           /* most systems can safely undef this */
  19
  20 #include <linux/types.h>
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/delay.h>
  24 #include <linux/timer.h>
  25 #include <linux/mm.h>
  26 #include <linux/ioport.h>
  27 #include <linux/blkdev.h>
  28 #include <linux/hdreg.h>
  29 #include <linux/pci.h>
  30 #include <linux/ide.h>
  31 #include <linux/init.h>
  32
  33 #include <asm/io.h>
  34
  35 static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif)
  36 {
  37         u16 reg;
  38         struct pci_dev *dev = hwif->pci_dev;
  39
  40         hwif->chipset = ide_rz1000;
  41         if (!pci_read_config_word (dev, 0x40, &reg) &&
  42             !pci_write_config_word(dev, 0x40, reg & 0xdfff)) {
  43                 printk(KERN_INFO "%s: disabled chipset read-ahead "
  44                         "(buggy RZ1000/RZ1001)\n", hwif->name);
  45         } else {
  46                 hwif->serialized = 1;
  47                 hwif->drives[0].no_unmask = 1;
  48                 hwif->drives[1].no_unmask = 1;
  49                 printk(KERN_INFO "%s: serialized, disabled unmasking "
  50                         "(buggy RZ1000/RZ1001)\n", hwif->name);
  51         }
  52 }
  53
  54 static ide_pci_device_t rz1000_chipset __devinitdata = {
  55         .name           = "RZ100x",
  56         .init_hwif      = init_hwif_rz1000,
  57         .channels       = 2,
  58         .autodma        = NODMA,
  59         .bootable       = ON_BOARD,
  60 };
  61
  62 static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id)
  63 {
  64         return ide_setup_pci_device(dev, &rz1000_chipset);
  65 }
  66
  67 static struct pci_device_id rz1000_pci_tbl[] = {
  68         { PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  69         { PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
  70         { 0, },
  71 };
  72 MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl);
  73
  74 static struct pci_driver driver = {
  75         .name           = "RZ1000_IDE",
  76         .id_table       = rz1000_pci_tbl,
  77         .probe          = rz1000_init_one,
  78 };
  79
  80 static int rz1000_ide_init(void)
  81 {
  82         return ide_pci_register_driver(&driver);
  83 }
  84
  85 module_init(rz1000_ide_init);
  86
  87 MODULE_AUTHOR("Andre Hedrick");
  88 MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
  89 MODULE_LICENSE("GPL");
  90