[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / ide / pci / rz1000.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/hdreg.h>
#include <linux/pci.h>
#include <linux/ide.h>
#include <linux/init.h>

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, &reg) &&
	    !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->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 const struct ide_port_info rz1000_chipset __devinitdata = {
	.name		= "RZ100x",
	.init_hwif	= init_hwif_rz1000,
	.chipset	= ide_rz1000,
	.host_flags	= IDE_HFLAG_NO_DMA | 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	1	/*
1da177e4 LT	2	* Copyright (C) 1995-1998 Linus Torvalds & author (see below)
	3	*/
	4
	5	/*
	6	* Principal Author: mlord@pobox.com (Mark Lord)
	7	*
	8	* See linux/MAINTAINERS for address of current maintainer.
	9	*
	10	* This file provides support for disabling the buggy read-ahead
	11	* mode of the RZ1000 IDE chipset, commonly used on Intel motherboards.
	12	*
	13	* Dunno if this fixes both ports, or only the primary port (?).
	14	*/
	15
1da177e4 LT	16	#include <linux/types.h>
	17	#include <linux/module.h>
	18	#include <linux/kernel.h>
1da177e4 LT	19	#include <linux/hdreg.h>
	20	#include <linux/pci.h>
	21	#include <linux/ide.h>
	22	#include <linux/init.h>
	23
1da177e4 LT	24	static void __devinit init_hwif_rz1000 (ide_hwif_t *hwif)
1da177e4 LT	25	{
36501650	26	struct pci_dev *dev = to_pci_dev(hwif->dev);
1da177e4	27	u16 reg;
1da177e4	28
1da177e4 LT	29	if (!pci_read_config_word (dev, 0x40, &reg) &&
	30	!pci_write_config_word(dev, 0x40, reg & 0xdfff)) {
	31	printk(KERN_INFO "%s: disabled chipset read-ahead "
	32	"(buggy RZ1000/RZ1001)\n", hwif->name);
	33	} else {
746f312a BZ	34	if (hwif->mate)
746f312a BZ	35	hwif->mate->serialized = hwif->serialized = 1;
1da177e4 LT	36	hwif->drives[0].no_unmask = 1;
	37	hwif->drives[1].no_unmask = 1;
	38	printk(KERN_INFO "%s: serialized, disabled unmasking "
	39	"(buggy RZ1000/RZ1001)\n", hwif->name);
	40	}
	41	}
	42
85620436	43	static const struct ide_port_info rz1000_chipset __devinitdata = {
1da177e4 LT	44	.name = "RZ100x",
1da177e4 LT	45	.init_hwif = init_hwif_rz1000,
528a572d	46	.chipset = ide_rz1000,
47b68788	47	.host_flags = IDE_HFLAG_NO_DMA \| IDE_HFLAG_BOOTABLE,
1da177e4 LT	48	};
	49
	50	static int __devinit rz1000_init_one(struct pci_dev dev, const struct pci_device_id id)
	51	{
	52	return ide_setup_pci_device(dev, &rz1000_chipset);
	53	}
	54
9cbcc5e3 BZ	55	static const struct pci_device_id rz1000_pci_tbl[] = {
	56	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1000), 0 },
	57	{ PCI_VDEVICE(PCTECH, PCI_DEVICE_ID_PCTECH_RZ1001), 0 },
1da177e4 LT	58	{ 0, },
	59	};
	60	MODULE_DEVICE_TABLE(pci, rz1000_pci_tbl);
	61
	62	static struct pci_driver driver = {
	63	.name = "RZ1000_IDE",
	64	.id_table = rz1000_pci_tbl,
	65	.probe = rz1000_init_one,
	66	};
	67
82ab1eec	68	static int __init rz1000_ide_init(void)
1da177e4 LT	69	{
	70	return ide_pci_register_driver(&driver);
	71	}
	72
	73	module_init(rz1000_ide_init);
	74
	75	MODULE_AUTHOR("Andre Hedrick");
	76	MODULE_DESCRIPTION("PCI driver module for RZ1000 IDE");
	77	MODULE_LICENSE("GPL");
	78