drivers/ide/pci/amd74xx.c - kernel/msm - Gitiles

 /*
  * Version 2.24
  *
  * AMD 755/756/766/8111 and nVidia nForce/2/2s/3/3s/CK804/MCP04
  * IDE driver for Linux.
  *
  * Copyright (c) 2000-2002 Vojtech Pavlik
  * Copyright (c) 2007 Bartlomiej Zolnierkiewicz
  *
  * Based on the work of:
  *      Andre Hedrick
  */

 /*
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published by
  * the Free Software Foundation.
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/ioport.h>
 #include <linux/blkdev.h>
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/ide.h>
 #include <asm/io.h>

 #include "ide-timing.h"

 #define AMD_IDE_CONFIG		(0x01 + amd_config->base)
 #define AMD_CABLE_DETECT	(0x02 + amd_config->base)
 #define AMD_DRIVE_TIMING	(0x08 + amd_config->base)
 #define AMD_8BIT_TIMING		(0x0e + amd_config->base)
 #define AMD_ADDRESS_SETUP	(0x0c + amd_config->base)
 #define AMD_UDMA_TIMING		(0x10 + amd_config->base)

 #define AMD_CHECK_SWDMA		0x08
 #define AMD_BAD_SWDMA		0x10
 #define AMD_BAD_FIFO		0x20
 #define AMD_CHECK_SERENADE	0x40

 /*
  * AMD SouthBridge chips.
  */

 static struct amd_ide_chip {
 	unsigned short id;
 	u8 base;
 	u8 udma_mask;
 	u8 flags;
 } amd_ide_chips[] = {
 	{ PCI_DEVICE_ID_AMD_COBRA_7401,		 0x40, ATA_UDMA2, AMD_BAD_SWDMA },
 	{ PCI_DEVICE_ID_AMD_VIPER_7409,		 0x40, ATA_UDMA4, AMD_CHECK_SWDMA },
 	{ PCI_DEVICE_ID_AMD_VIPER_7411,		 0x40, ATA_UDMA5, AMD_BAD_FIFO },
 	{ PCI_DEVICE_ID_AMD_OPUS_7441,		 0x40, ATA_UDMA5, },
 	{ PCI_DEVICE_ID_AMD_8111_IDE,		 0x40, ATA_UDMA6, AMD_CHECK_SERENADE },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE_IDE,	 0x50, ATA_UDMA5, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE2_IDE,	 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE2S_IDE,	 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA,	 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE3_IDE,	 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE3S_IDE,	 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA,	 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2,	 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_IDE, 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_IDE, 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_IDE, 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_IDE, 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_IDE, 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_IDE, 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_IDE, 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE, 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE, 0x50, ATA_UDMA6, },
 	{ PCI_DEVICE_ID_AMD_CS5536_IDE,		 0x40, ATA_UDMA5, },
 	{ 0 }
 };

 static struct amd_ide_chip *amd_config;
 static const struct ide_port_info *amd_chipset;
 static unsigned int amd_80w;
 static unsigned int amd_clock;

 static char *amd_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
 static unsigned char amd_cyc2udma[] = { 6, 6, 5, 4, 0, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 7 };

 /*
  * amd_set_speed() writes timing values to the chipset registers
  */

 static void amd_set_speed(struct pci_dev *dev, unsigned char dn, struct ide_timing *timing)
 {
 	unsigned char t;

 	pci_read_config_byte(dev, AMD_ADDRESS_SETUP, &t);
 	t = (t & ~(3 << ((3 - dn) << 1))) | ((FIT(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
 	pci_write_config_byte(dev, AMD_ADDRESS_SETUP, t);

 	pci_write_config_byte(dev, AMD_8BIT_TIMING + (1 - (dn >> 1)),
 		((FIT(timing->act8b, 1, 16) - 1) << 4) | (FIT(timing->rec8b, 1, 16) - 1));

 	pci_write_config_byte(dev, AMD_DRIVE_TIMING + (3 - dn),
 		((FIT(timing->active, 1, 16) - 1) << 4) | (FIT(timing->recover, 1, 16) - 1));

 	switch (amd_config->udma_mask) {
 	case ATA_UDMA2: t = timing->udma ? (0xc0 | (FIT(timing->udma, 2, 5) - 2)) : 0x03; break;
 	case ATA_UDMA4: t = timing->udma ? (0xc0 | amd_cyc2udma[FIT(timing->udma, 2, 10)]) : 0x03; break;
 	case ATA_UDMA5: t = timing->udma ? (0xc0 | amd_cyc2udma[FIT(timing->udma, 1, 10)]) : 0x03; break;
 	case ATA_UDMA6: t = timing->udma ? (0xc0 | amd_cyc2udma[FIT(timing->udma, 1, 15)]) : 0x03; break;
 	default: return;
 	}

 	pci_write_config_byte(dev, AMD_UDMA_TIMING + (3 - dn), t);
 }

 /*
  * amd_set_drive() computes timing values and configures the chipset
  * to a desired transfer mode.  It also can be called by upper layers.
  */

 static void amd_set_drive(ide_drive_t *drive, const u8 speed)
 {
 	ide_drive_t *peer = HWIF(drive)->drives + (~drive->dn & 1);
 	struct ide_timing t, p;
 	int T, UT;

 	T = 1000000000 / amd_clock;
 	UT = (amd_config->udma_mask == ATA_UDMA2) ? T : (T / 2);

 	ide_timing_compute(drive, speed, &t, T, UT);

 	if (peer->present) {
 		ide_timing_compute(peer, peer->current_speed, &p, T, UT);
 		ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
 	}

 	if (speed == XFER_UDMA_5 && amd_clock <= 33333) t.udma = 1;
 	if (speed == XFER_UDMA_6 && amd_clock <= 33333) t.udma = 15;

 	amd_set_speed(HWIF(drive)->pci_dev, drive->dn, &t);
 }

 /*
  * amd_set_pio_mode() is a callback from upper layers for PIO-only tuning.
  */

 static void amd_set_pio_mode(ide_drive_t *drive, const u8 pio)
 {
 	amd_set_drive(drive, XFER_PIO_0 + pio);
 }

 /*
  * The initialization callback. Here we determine the IDE chip type
  * and initialize its drive independent registers.
  */

 static unsigned int __devinit init_chipset_amd74xx(struct pci_dev *dev, const char *name)
 {
 	unsigned char t;
 	unsigned int u;
 	int i;

 /*
  * Check for bad SWDMA.
  */

 	if (amd_config->flags & AMD_CHECK_SWDMA) {
 		if (dev->revision <= 7)
 			amd_config->flags |= AMD_BAD_SWDMA;
 	}

 /*
  * Check 80-wire cable presence.
  */

 	switch (amd_config->udma_mask) {

 		case ATA_UDMA6:
 		case ATA_UDMA5:
 			pci_read_config_byte(dev, AMD_CABLE_DETECT, &t);
 			pci_read_config_dword(dev, AMD_UDMA_TIMING, &u);
 			amd_80w = ((t & 0x3) ? 1 : 0) | ((t & 0xc) ? 2 : 0);
 			for (i = 24; i >= 0; i -= 8)
 				if (((u >> i) & 4) && !(amd_80w & (1 << (1 - (i >> 4))))) {
 					printk(KERN_WARNING "%s: BIOS didn't set cable bits correctly. Enabling workaround.\n",
 						amd_chipset->name);
 					amd_80w |= (1 << (1 - (i >> 4)));
 				}
 			break;

 		case ATA_UDMA4:
 			/* no host side cable detection */
 			amd_80w = 0x03;
 			break;
 	}

 /*
  * Take care of prefetch & postwrite.
  */

 	pci_read_config_byte(dev, AMD_IDE_CONFIG, &t);
 	pci_write_config_byte(dev, AMD_IDE_CONFIG,
 		(amd_config->flags & AMD_BAD_FIFO) ? (t & 0x0f) : (t | 0xf0));

 /*
  * Take care of incorrectly wired Serenade mainboards.
  */

 	if ((amd_config->flags & AMD_CHECK_SERENADE) &&
 		dev->subsystem_vendor == PCI_VENDOR_ID_AMD &&
 		dev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE)
 			amd_config->udma_mask = ATA_UDMA5;

 /*
  * Determine the system bus clock.
  */

 	amd_clock = system_bus_clock() * 1000;

 	switch (amd_clock) {
 		case 33000: amd_clock = 33333; break;
 		case 37000: amd_clock = 37500; break;
 		case 41000: amd_clock = 41666; break;
 	}

 	if (amd_clock < 20000 || amd_clock > 50000) {
 		printk(KERN_WARNING "%s: User given PCI clock speed impossible (%d), using 33 MHz instead.\n",
 			amd_chipset->name, amd_clock);
 		amd_clock = 33333;
 	}

 /*
  * Print the boot message.
  */

 	printk(KERN_INFO "%s: %s (rev %02x) UDMA%s controller\n",
 		amd_chipset->name, pci_name(dev), dev->revision,
 		amd_dma[fls(amd_config->udma_mask) - 1]);

 	return dev->irq;
 }

 static void __devinit init_hwif_amd74xx(ide_hwif_t *hwif)
 {
 	if (hwif->irq == 0) /* 0 is bogus but will do for now */
 		hwif->irq = pci_get_legacy_ide_irq(hwif->pci_dev, hwif->channel);

 	hwif->set_pio_mode = &amd_set_pio_mode;
 	hwif->set_dma_mode = &amd_set_drive;

 	if (!hwif->dma_base)
 		return;

 	hwif->ultra_mask = amd_config->udma_mask;
 	if (amd_config->flags & AMD_BAD_SWDMA)
 		hwif->swdma_mask = 0x00;

 	if (hwif->cbl != ATA_CBL_PATA40_SHORT) {
 		if ((amd_80w >> hwif->channel) & 1)
 			hwif->cbl = ATA_CBL_PATA80;
 		else
 			hwif->cbl = ATA_CBL_PATA40;
 	}
 }

 #define IDE_HFLAGS_AMD \
 	(IDE_HFLAG_PIO_NO_BLACKLIST | \
 	 IDE_HFLAG_PIO_NO_DOWNGRADE | \
 	 IDE_HFLAG_ABUSE_SET_DMA_MODE | \
 	 IDE_HFLAG_POST_SET_MODE | \
 	 IDE_HFLAG_IO_32BIT | \
 	 IDE_HFLAG_UNMASK_IRQS | \
 	 IDE_HFLAG_BOOTABLE)

 #define DECLARE_AMD_DEV(name_str)					\
 	{								\
 		.name		= name_str,				\
 		.init_chipset	= init_chipset_amd74xx,			\
 		.init_hwif	= init_hwif_amd74xx,			\
 		.enablebits	= {{0x40,0x02,0x02}, {0x40,0x01,0x01}},	\
 		.host_flags	= IDE_HFLAGS_AMD,			\
 		.pio_mask	= ATA_PIO5,				\
 		.swdma_mask	= ATA_SWDMA2,				\
 		.mwdma_mask	= ATA_MWDMA2,				\
 	}

 #define DECLARE_NV_DEV(name_str)					\
 	{								\
 		.name		= name_str,				\
 		.init_chipset	= init_chipset_amd74xx,			\
 		.init_hwif	= init_hwif_amd74xx,			\
 		.enablebits	= {{0x50,0x02,0x02}, {0x50,0x01,0x01}},	\
 		.host_flags	= IDE_HFLAGS_AMD,			\
 		.pio_mask	= ATA_PIO5,				\
 		.swdma_mask	= ATA_SWDMA2,				\
 		.mwdma_mask	= ATA_MWDMA2,				\
 	}

 static const struct ide_port_info amd74xx_chipsets[] __devinitdata = {
 	/*  0 */ DECLARE_AMD_DEV("AMD7401"),
 	/*  1 */ DECLARE_AMD_DEV("AMD7409"),
 	/*  2 */ DECLARE_AMD_DEV("AMD7411"),
 	/*  3 */ DECLARE_AMD_DEV("AMD7441"),
 	/*  4 */ DECLARE_AMD_DEV("AMD8111"),

 	/*  5 */ DECLARE_NV_DEV("NFORCE"),
 	/*  6 */ DECLARE_NV_DEV("NFORCE2"),
 	/*  7 */ DECLARE_NV_DEV("NFORCE2-U400R"),
 	/*  8 */ DECLARE_NV_DEV("NFORCE2-U400R-SATA"),
 	/*  9 */ DECLARE_NV_DEV("NFORCE3-150"),
 	/* 10 */ DECLARE_NV_DEV("NFORCE3-250"),
 	/* 11 */ DECLARE_NV_DEV("NFORCE3-250-SATA"),
 	/* 12 */ DECLARE_NV_DEV("NFORCE3-250-SATA2"),
 	/* 13 */ DECLARE_NV_DEV("NFORCE-CK804"),
 	/* 14 */ DECLARE_NV_DEV("NFORCE-MCP04"),
 	/* 15 */ DECLARE_NV_DEV("NFORCE-MCP51"),
 	/* 16 */ DECLARE_NV_DEV("NFORCE-MCP55"),
 	/* 17 */ DECLARE_NV_DEV("NFORCE-MCP61"),
 	/* 18 */ DECLARE_NV_DEV("NFORCE-MCP65"),
 	/* 19 */ DECLARE_NV_DEV("NFORCE-MCP67"),
 	/* 20 */ DECLARE_NV_DEV("NFORCE-MCP73"),
 	/* 21 */ DECLARE_NV_DEV("NFORCE-MCP77"),
 	/* 22 */ DECLARE_AMD_DEV("AMD5536"),
 };

 static int __devinit amd74xx_probe(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	amd_chipset = amd74xx_chipsets + id->driver_data;
 	amd_config = amd_ide_chips + id->driver_data;
 	if (dev->device != amd_config->id) {
 		printk(KERN_ERR "%s: assertion 0x%02x == 0x%02x failed !\n",
 		       pci_name(dev), dev->device, amd_config->id);
 		return -ENODEV;
 	}
 	return ide_setup_pci_device(dev, amd_chipset);
 }

 static const struct pci_device_id amd74xx_pci_tbl[] = {
 	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_COBRA_7401),		 0 },
 	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_VIPER_7409),		 1 },
 	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_VIPER_7411),		 2 },
 	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_OPUS_7441),		 3 },
 	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_8111_IDE),		 4 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_IDE),	 5 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE2_IDE),	 6 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE2S_IDE),	 7 },
 #ifdef CONFIG_BLK_DEV_IDE_SATA
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA),	 8 },
 #endif
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE3_IDE),	 9 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE3S_IDE),	10 },
 #ifdef CONFIG_BLK_DEV_IDE_SATA
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA),	11 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2),	12 },
 #endif
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_IDE),	13 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_IDE),	14 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_IDE),	15 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_IDE),	16 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_IDE),	17 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_IDE),	18 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_IDE),	19 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE),	20 },
 	{ PCI_VDEVICE(NVIDIA,	PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE),	21 },
 	{ PCI_VDEVICE(AMD,	PCI_DEVICE_ID_AMD_CS5536_IDE),		22 },
 	{ 0, },
 };
 MODULE_DEVICE_TABLE(pci, amd74xx_pci_tbl);

 static struct pci_driver driver = {
 	.name		= "AMD_IDE",
 	.id_table	= amd74xx_pci_tbl,
 	.probe		= amd74xx_probe,
 };

 static int __init amd74xx_ide_init(void)
 {
 	return ide_pci_register_driver(&driver);
 }

 module_init(amd74xx_ide_init);

 MODULE_AUTHOR("Vojtech Pavlik");
 MODULE_DESCRIPTION("AMD PCI IDE driver");
 MODULE_LICENSE("GPL");
	/*
	* Version 2.24
	*
	* AMD 755/756/766/8111 and nVidia nForce/2/2s/3/3s/CK804/MCP04
	* IDE driver for Linux.
	*
	* Copyright (c) 2000-2002 Vojtech Pavlik
	* Copyright (c) 2007 Bartlomiej Zolnierkiewicz
	*
	* Based on the work of:
	* Andre Hedrick
	*/

	/*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 as published by
	* the Free Software Foundation.
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/ioport.h>
	#include <linux/blkdev.h>
	#include <linux/pci.h>
	#include <linux/init.h>
	#include <linux/ide.h>
	#include <asm/io.h>

	#include "ide-timing.h"

	#define AMD_IDE_CONFIG (0x01 + amd_config->base)
	#define AMD_CABLE_DETECT (0x02 + amd_config->base)
	#define AMD_DRIVE_TIMING (0x08 + amd_config->base)
	#define AMD_8BIT_TIMING (0x0e + amd_config->base)
	#define AMD_ADDRESS_SETUP (0x0c + amd_config->base)
	#define AMD_UDMA_TIMING (0x10 + amd_config->base)

	#define AMD_CHECK_SWDMA 0x08
	#define AMD_BAD_SWDMA 0x10
	#define AMD_BAD_FIFO 0x20
	#define AMD_CHECK_SERENADE 0x40

	/*
	* AMD SouthBridge chips.
	*/

	static struct amd_ide_chip {
	unsigned short id;
	u8 base;
	u8 udma_mask;
	u8 flags;
	} amd_ide_chips[] = {
	{ PCI_DEVICE_ID_AMD_COBRA_7401, 0x40, ATA_UDMA2, AMD_BAD_SWDMA },
	{ PCI_DEVICE_ID_AMD_VIPER_7409, 0x40, ATA_UDMA4, AMD_CHECK_SWDMA },
	{ PCI_DEVICE_ID_AMD_VIPER_7411, 0x40, ATA_UDMA5, AMD_BAD_FIFO },
	{ PCI_DEVICE_ID_AMD_OPUS_7441, 0x40, ATA_UDMA5, },
	{ PCI_DEVICE_ID_AMD_8111_IDE, 0x40, ATA_UDMA6, AMD_CHECK_SERENADE },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE_IDE, 0x50, ATA_UDMA5, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE2_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE2S_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE3_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE3S_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE, 0x50, ATA_UDMA6, },
	{ PCI_DEVICE_ID_AMD_CS5536_IDE, 0x40, ATA_UDMA5, },
	{ 0 }
	};

	static struct amd_ide_chip *amd_config;
	static const struct ide_port_info *amd_chipset;
	static unsigned int amd_80w;
	static unsigned int amd_clock;

	static char *amd_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
	static unsigned char amd_cyc2udma[] = { 6, 6, 5, 4, 0, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 7 };

	/*
	* amd_set_speed() writes timing values to the chipset registers
	*/

	static void amd_set_speed(struct pci_dev dev, unsigned char dn, struct ide_timing timing)
	{
	unsigned char t;

	pci_read_config_byte(dev, AMD_ADDRESS_SETUP, &t);
	t = (t & ~(3 << ((3 - dn) << 1))) \| ((FIT(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
	pci_write_config_byte(dev, AMD_ADDRESS_SETUP, t);

	pci_write_config_byte(dev, AMD_8BIT_TIMING + (1 - (dn >> 1)),
	((FIT(timing->act8b, 1, 16) - 1) << 4) \| (FIT(timing->rec8b, 1, 16) - 1));

	pci_write_config_byte(dev, AMD_DRIVE_TIMING + (3 - dn),
	((FIT(timing->active, 1, 16) - 1) << 4) \| (FIT(timing->recover, 1, 16) - 1));

	switch (amd_config->udma_mask) {
	case ATA_UDMA2: t = timing->udma ? (0xc0 \| (FIT(timing->udma, 2, 5) - 2)) : 0x03; break;
	case ATA_UDMA4: t = timing->udma ? (0xc0 \| amd_cyc2udma[FIT(timing->udma, 2, 10)]) : 0x03; break;
	case ATA_UDMA5: t = timing->udma ? (0xc0 \| amd_cyc2udma[FIT(timing->udma, 1, 10)]) : 0x03; break;
	case ATA_UDMA6: t = timing->udma ? (0xc0 \| amd_cyc2udma[FIT(timing->udma, 1, 15)]) : 0x03; break;
	default: return;
	}

	pci_write_config_byte(dev, AMD_UDMA_TIMING + (3 - dn), t);
	}

	/*
	* amd_set_drive() computes timing values and configures the chipset
	* to a desired transfer mode. It also can be called by upper layers.
	*/

	static void amd_set_drive(ide_drive_t *drive, const u8 speed)
	{
	ide_drive_t *peer = HWIF(drive)->drives + (~drive->dn & 1);
	struct ide_timing t, p;
	int T, UT;

	T = 1000000000 / amd_clock;
	UT = (amd_config->udma_mask == ATA_UDMA2) ? T : (T / 2);

	ide_timing_compute(drive, speed, &t, T, UT);

	if (peer->present) {
	ide_timing_compute(peer, peer->current_speed, &p, T, UT);
	ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
	}

	if (speed == XFER_UDMA_5 && amd_clock <= 33333) t.udma = 1;
	if (speed == XFER_UDMA_6 && amd_clock <= 33333) t.udma = 15;

	amd_set_speed(HWIF(drive)->pci_dev, drive->dn, &t);
	}

	/*
	* amd_set_pio_mode() is a callback from upper layers for PIO-only tuning.
	*/

	static void amd_set_pio_mode(ide_drive_t *drive, const u8 pio)
	{
	amd_set_drive(drive, XFER_PIO_0 + pio);
	}

	/*
	* The initialization callback. Here we determine the IDE chip type
	* and initialize its drive independent registers.
	*/

	static unsigned int __devinit init_chipset_amd74xx(struct pci_dev dev, const char name)
	{
	unsigned char t;
	unsigned int u;
	int i;

	/*
	* Check for bad SWDMA.
	*/

	if (amd_config->flags & AMD_CHECK_SWDMA) {
	if (dev->revision <= 7)
	amd_config->flags \|= AMD_BAD_SWDMA;
	}

	/*
	* Check 80-wire cable presence.
	*/

	switch (amd_config->udma_mask) {

	case ATA_UDMA6:
	case ATA_UDMA5:
	pci_read_config_byte(dev, AMD_CABLE_DETECT, &t);
	pci_read_config_dword(dev, AMD_UDMA_TIMING, &u);
	amd_80w = ((t & 0x3) ? 1 : 0) \| ((t & 0xc) ? 2 : 0);
	for (i = 24; i >= 0; i -= 8)
	if (((u >> i) & 4) && !(amd_80w & (1 << (1 - (i >> 4))))) {
	printk(KERN_WARNING "%s: BIOS didn't set cable bits correctly. Enabling workaround.\n",
	amd_chipset->name);
	amd_80w \|= (1 << (1 - (i >> 4)));
	}
	break;

	case ATA_UDMA4:
	/* no host side cable detection */
	amd_80w = 0x03;
	break;
	}

	/*
	* Take care of prefetch & postwrite.
	*/

	pci_read_config_byte(dev, AMD_IDE_CONFIG, &t);
	pci_write_config_byte(dev, AMD_IDE_CONFIG,
	(amd_config->flags & AMD_BAD_FIFO) ? (t & 0x0f) : (t \| 0xf0));

	/*
	* Take care of incorrectly wired Serenade mainboards.
	*/

	if ((amd_config->flags & AMD_CHECK_SERENADE) &&
	dev->subsystem_vendor == PCI_VENDOR_ID_AMD &&
	dev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE)
	amd_config->udma_mask = ATA_UDMA5;

	/*
	* Determine the system bus clock.
	*/

	amd_clock = system_bus_clock() * 1000;

	switch (amd_clock) {
	case 33000: amd_clock = 33333; break;
	case 37000: amd_clock = 37500; break;
	case 41000: amd_clock = 41666; break;
	}

	if (amd_clock < 20000 \|\| amd_clock > 50000) {
	printk(KERN_WARNING "%s: User given PCI clock speed impossible (%d), using 33 MHz instead.\n",
	amd_chipset->name, amd_clock);
	amd_clock = 33333;
	}

	/*
	* Print the boot message.
	*/

	printk(KERN_INFO "%s: %s (rev %02x) UDMA%s controller\n",
	amd_chipset->name, pci_name(dev), dev->revision,
	amd_dma[fls(amd_config->udma_mask) - 1]);

	return dev->irq;
	}

	static void __devinit init_hwif_amd74xx(ide_hwif_t *hwif)
	{
	if (hwif->irq == 0) /* 0 is bogus but will do for now */
	hwif->irq = pci_get_legacy_ide_irq(hwif->pci_dev, hwif->channel);

	hwif->set_pio_mode = &amd_set_pio_mode;
	hwif->set_dma_mode = &amd_set_drive;

	if (!hwif->dma_base)
	return;

	hwif->ultra_mask = amd_config->udma_mask;
	if (amd_config->flags & AMD_BAD_SWDMA)
	hwif->swdma_mask = 0x00;

	if (hwif->cbl != ATA_CBL_PATA40_SHORT) {
	if ((amd_80w >> hwif->channel) & 1)
	hwif->cbl = ATA_CBL_PATA80;
	else
	hwif->cbl = ATA_CBL_PATA40;
	}
	}

	#define IDE_HFLAGS_AMD \
	(IDE_HFLAG_PIO_NO_BLACKLIST \| \
	IDE_HFLAG_PIO_NO_DOWNGRADE \| \
	IDE_HFLAG_ABUSE_SET_DMA_MODE \| \
	IDE_HFLAG_POST_SET_MODE \| \
	IDE_HFLAG_IO_32BIT \| \
	IDE_HFLAG_UNMASK_IRQS \| \
	IDE_HFLAG_BOOTABLE)

	#define DECLARE_AMD_DEV(name_str) \
	{ \
	.name = name_str, \
	.init_chipset = init_chipset_amd74xx, \
	.init_hwif = init_hwif_amd74xx, \
	.enablebits = {{0x40,0x02,0x02}, {0x40,0x01,0x01}}, \
	.host_flags = IDE_HFLAGS_AMD, \
	.pio_mask = ATA_PIO5, \
	.swdma_mask = ATA_SWDMA2, \
	.mwdma_mask = ATA_MWDMA2, \
	}

	#define DECLARE_NV_DEV(name_str) \
	{ \
	.name = name_str, \
	.init_chipset = init_chipset_amd74xx, \
	.init_hwif = init_hwif_amd74xx, \
	.enablebits = {{0x50,0x02,0x02}, {0x50,0x01,0x01}}, \
	.host_flags = IDE_HFLAGS_AMD, \
	.pio_mask = ATA_PIO5, \
	.swdma_mask = ATA_SWDMA2, \
	.mwdma_mask = ATA_MWDMA2, \
	}

	static const struct ide_port_info amd74xx_chipsets[] __devinitdata = {
	/* 0 */ DECLARE_AMD_DEV("AMD7401"),
	/* 1 */ DECLARE_AMD_DEV("AMD7409"),
	/* 2 */ DECLARE_AMD_DEV("AMD7411"),
	/* 3 */ DECLARE_AMD_DEV("AMD7441"),
	/* 4 */ DECLARE_AMD_DEV("AMD8111"),

	/* 5 */ DECLARE_NV_DEV("NFORCE"),
	/* 6 */ DECLARE_NV_DEV("NFORCE2"),
	/* 7 */ DECLARE_NV_DEV("NFORCE2-U400R"),
	/* 8 */ DECLARE_NV_DEV("NFORCE2-U400R-SATA"),
	/* 9 */ DECLARE_NV_DEV("NFORCE3-150"),
	/* 10 */ DECLARE_NV_DEV("NFORCE3-250"),
	/* 11 */ DECLARE_NV_DEV("NFORCE3-250-SATA"),
	/* 12 */ DECLARE_NV_DEV("NFORCE3-250-SATA2"),
	/* 13 */ DECLARE_NV_DEV("NFORCE-CK804"),
	/* 14 */ DECLARE_NV_DEV("NFORCE-MCP04"),
	/* 15 */ DECLARE_NV_DEV("NFORCE-MCP51"),
	/* 16 */ DECLARE_NV_DEV("NFORCE-MCP55"),
	/* 17 */ DECLARE_NV_DEV("NFORCE-MCP61"),
	/* 18 */ DECLARE_NV_DEV("NFORCE-MCP65"),
	/* 19 */ DECLARE_NV_DEV("NFORCE-MCP67"),
	/* 20 */ DECLARE_NV_DEV("NFORCE-MCP73"),
	/* 21 */ DECLARE_NV_DEV("NFORCE-MCP77"),
	/* 22 */ DECLARE_AMD_DEV("AMD5536"),
	};

	static int __devinit amd74xx_probe(struct pci_dev dev, const struct pci_device_id id)
	{
	amd_chipset = amd74xx_chipsets + id->driver_data;
	amd_config = amd_ide_chips + id->driver_data;
	if (dev->device != amd_config->id) {
	printk(KERN_ERR "%s: assertion 0x%02x == 0x%02x failed !\n",
	pci_name(dev), dev->device, amd_config->id);
	return -ENODEV;
	}
	return ide_setup_pci_device(dev, amd_chipset);
	}

	static const struct pci_device_id amd74xx_pci_tbl[] = {
	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_COBRA_7401), 0 },
	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_VIPER_7409), 1 },
	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_VIPER_7411), 2 },
	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_OPUS_7441), 3 },
	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_8111_IDE), 4 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_IDE), 5 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2_IDE), 6 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_IDE), 7 },
	#ifdef CONFIG_BLK_DEV_IDE_SATA
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2S_SATA), 8 },
	#endif
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3_IDE), 9 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_IDE), 10 },
	#ifdef CONFIG_BLK_DEV_IDE_SATA
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA), 11 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE3S_SATA2), 12 },
	#endif
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_CK804_IDE), 13 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP04_IDE), 14 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_IDE), 15 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP55_IDE), 16 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP61_IDE), 17 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP65_IDE), 18 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP67_IDE), 19 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP73_IDE), 20 },
	{ PCI_VDEVICE(NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE_MCP77_IDE), 21 },
	{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_CS5536_IDE), 22 },
	{ 0, },
	};
	MODULE_DEVICE_TABLE(pci, amd74xx_pci_tbl);

	static struct pci_driver driver = {
	.name = "AMD_IDE",
	.id_table = amd74xx_pci_tbl,
	.probe = amd74xx_probe,
	};

	static int __init amd74xx_ide_init(void)
	{
	return ide_pci_register_driver(&driver);
	}

	module_init(amd74xx_ide_init);

	MODULE_AUTHOR("Vojtech Pavlik");
	MODULE_DESCRIPTION("AMD PCI IDE driver");
	MODULE_LICENSE("GPL");