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 hwif->chipset = ide_rz1000; 39 if (!pci_read_config_word (dev, 0x40, ®) && 40 !pci_write_config_word(dev, 0x40, reg & 0xdfff)) { 41 printk(KERN_INFO "%s: disabled chipset read-ahead " 42 "(buggy RZ1000/RZ1001)\n", hwif->name); 43 } else { 44 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 ide_pci_device_t rz1000_chipset __devinitdata = { 53 .name = "RZ100x", 54 .init_hwif = init_hwif_rz1000, 55 .channels = 2, 56 .autodma = NODMA, 57 .bootable = ON_BOARD, 58}; 59 60static int __devinit rz1000_init_one(struct pci_dev *dev, const struct pci_device_id *id) 61{ 62 return ide_setup_pci_device(dev, &rz1000_chipset); 63} 64 65static struct pci_device_id rz1000_pci_tbl[] = { 66 { PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 67 { PCI_VENDOR_ID_PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 68 { 0, }, 69}; 70MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl); 71 72static struct pci_driver driver = { 73 .name = "RZ1000_IDE", 74 .id_table = rz1000_pci_tbl, 75 .probe = rz1000_init_one, 76}; 77 78static int __init rz1000_ide_init(void) 79{ 80 return ide_pci_register_driver(&driver); 81} 82 83module_init(rz1000_ide_init); 84 85MODULE_AUTHOR("Andre Hedrick"); 86MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE"); 87MODULE_LICENSE("GPL"); 88