[deliverable/linux.git] / drivers / ide / pci / rz1000.c

/*
 *  linux/drivers/ide/pci/rz1000.c	Version 0.06	January 12, 2003
 *
 *  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/delay.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/ioport.h>
#include <linux/blkdev.h>
#include <linux/hdreg.h>
#include <linux/pci.h>
#include <linux/ide.h>
#include <linux/init.h>

#include <asm/io.h>

static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif)
{
	u16 reg;
	struct pci_dev *dev = hwif->pci_dev;

	hwif->chipset = ide_rz1000;
	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 {
		hwif->serialized = 1;
		hwif->drives[0].no_unmask = 1;
		hwif->drives[1].no_unmask = 1;
		printk(KERN_INFO "%s: serialized, disabled unmasking "
			"(buggy RZ1000/RZ1001)\n", hwif->name);
	}
}

static ide_pci_device_t rz1000_chipset __devinitdata = {
	.name		= "RZ100x",
	.init_hwif	= init_hwif_rz1000,
	.autodma	= NODMA,
	.host_flags	= 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");
Commit	Line	Data
1da177e4 LT	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
1da177e4 LT	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
	33	static 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, &reg) &&
	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
	52	static ide_pci_device_t rz1000_chipset __devinitdata = {
	53	.name = "RZ100x",
	54	.init_hwif = init_hwif_rz1000,
1da177e4	55	.autodma = NODMA,
7cab14a7	56	.host_flags = IDE_HFLAG_BOOTABLE,
1da177e4 LT	57	};
	58
	59	static 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
9cbcc5e3 BZ	64	static 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 },
1da177e4 LT	67	{ 0, },
	68	};
	69	MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl);
	70
	71	static struct pci_driver driver = {
	72	.name = "RZ1000_IDE",
	73	.id_table = rz1000_pci_tbl,
	74	.probe = rz1000_init_one,
	75	};
	76
82ab1eec	77	static int __init rz1000_ide_init(void)
1da177e4 LT	78	{
	79	return ide_pci_register_driver(&driver);
	80	}
	81
	82	module_init(rz1000_ide_init);
	83
	84	MODULE_AUTHOR("Andre Hedrick");
	85	MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
	86	MODULE_LICENSE("GPL");
	87