[deliverable/linux.git] / drivers / ide / pci / via82cxxx.c

/*
 * VIA IDE driver for Linux. Supported southbridges:
 *
 *   vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
 *   vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
 *   vt8235, vt8237, vt8237a
 *
 * Copyright (c) 2000-2002 Vojtech Pavlik
 * Copyright (c) 2007 Bartlomiej Zolnierkiewicz
 *
 * Based on the work of:
 *	Michel Aubry
 *	Jeff Garzik
 *	Andre Hedrick
 *
 * Documentation:
 *	Obsolete device documentation publically available from via.com.tw
 *	Current device documentation available under NDA only
 */

/*
 * 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/pci.h>
#include <linux/init.h>
#include <linux/ide.h>
#include <linux/dmi.h>

#ifdef CONFIG_PPC_CHRP
#include <asm/processor.h>
#endif

#define VIA_IDE_ENABLE		0x40
#define VIA_IDE_CONFIG		0x41
#define VIA_FIFO_CONFIG		0x43
#define VIA_MISC_1		0x44
#define VIA_MISC_2		0x45
#define VIA_MISC_3		0x46
#define VIA_DRIVE_TIMING	0x48
#define VIA_8BIT_TIMING		0x4e
#define VIA_ADDRESS_SETUP	0x4c
#define VIA_UDMA_TIMING		0x50

#define VIA_BAD_PREQ		0x01 /* Crashes if PREQ# till DDACK# set */
#define VIA_BAD_CLK66		0x02 /* 66 MHz clock doesn't work correctly */
#define VIA_SET_FIFO		0x04 /* Needs to have FIFO split set */
#define VIA_NO_UNMASK		0x08 /* Doesn't work with IRQ unmasking on */
#define VIA_BAD_ID		0x10 /* Has wrong vendor ID (0x1107) */
#define VIA_BAD_AST		0x20 /* Don't touch Address Setup Timing */

/*
 * VIA SouthBridge chips.
 */

static struct via_isa_bridge {
	char *name;
	u16 id;
	u8 rev_min;
	u8 rev_max;
	u8 udma_mask;
	u8 flags;
} via_isa_bridges[] = {
	{ "vx800",	PCI_DEVICE_ID_VIA_VX800,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "cx700",	PCI_DEVICE_ID_VIA_CX700,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8237s",	PCI_DEVICE_ID_VIA_8237S,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt6410",	PCI_DEVICE_ID_VIA_6410,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8251",	PCI_DEVICE_ID_VIA_8251,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8237",	PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8237a",	PCI_DEVICE_ID_VIA_8237A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8235",	PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8233a",	PCI_DEVICE_ID_VIA_8233A,    0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	{ "vt8233c",	PCI_DEVICE_ID_VIA_8233C_0,  0x00, 0x2f, ATA_UDMA5, },
	{ "vt8233",	PCI_DEVICE_ID_VIA_8233_0,   0x00, 0x2f, ATA_UDMA5, },
	{ "vt8231",	PCI_DEVICE_ID_VIA_8231,     0x00, 0x2f, ATA_UDMA5, },
	{ "vt82c686b",	PCI_DEVICE_ID_VIA_82C686,   0x40, 0x4f, ATA_UDMA5, },
	{ "vt82c686a",	PCI_DEVICE_ID_VIA_82C686,   0x10, 0x2f, ATA_UDMA4, },
	{ "vt82c686",	PCI_DEVICE_ID_VIA_82C686,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
	{ "vt82c596b",	PCI_DEVICE_ID_VIA_82C596,   0x10, 0x2f, ATA_UDMA4, },
	{ "vt82c596a",	PCI_DEVICE_ID_VIA_82C596,   0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO | VIA_BAD_PREQ },
	{ "vt82c586b",	PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
	{ "vt82c586a",	PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
	{ "vt82c586",	PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f,      0x00, VIA_SET_FIFO },
	{ "vt82c576",	PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK },
	{ "vt82c576",	PCI_DEVICE_ID_VIA_82C576,   0x00, 0x2f,      0x00, VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID },
	{ NULL }
};

static unsigned int via_clock;
static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };

struct via82cxxx_dev
{
	struct via_isa_bridge *via_config;
	unsigned int via_80w;
};

/**
 *	via_set_speed			-	write timing registers
 *	@dev: PCI device
 *	@dn: device
 *	@timing: IDE timing data to use
 *
 *	via_set_speed writes timing values to the chipset registers
 */

static void via_set_speed(ide_hwif_t *hwif, u8 dn, struct ide_timing *timing)
{
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	struct ide_host *host = pci_get_drvdata(dev);
	struct via82cxxx_dev *vdev = host->host_priv;
	u8 t;

	if (~vdev->via_config->flags & VIA_BAD_AST) {
		pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
		t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
		pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
	}

	pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
		((clamp_val(timing->act8b, 1, 16) - 1) << 4) | (clamp_val(timing->rec8b, 1, 16) - 1));

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

	switch (vdev->via_config->udma_mask) {
	case ATA_UDMA2: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
	case ATA_UDMA4: t = timing->udma ? (0xe8 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break;
	case ATA_UDMA5: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
	case ATA_UDMA6: t = timing->udma ? (0xe0 | (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
	default: return;
	}

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

/**
 *	via_set_drive		-	configure transfer mode
 *	@drive: Drive to set up
 *	@speed: desired speed
 *
 *	via_set_drive() computes timing values configures the chipset to
 *	a desired transfer mode.  It also can be called by upper layers.
 */

static void via_set_drive(ide_drive_t *drive, const u8 speed)
{
	ide_hwif_t *hwif = drive->hwif;
	ide_drive_t *peer = hwif->drives + (~drive->dn & 1);
	struct pci_dev *dev = to_pci_dev(hwif->dev);
	struct ide_host *host = pci_get_drvdata(dev);
	struct via82cxxx_dev *vdev = host->host_priv;
	struct ide_timing t, p;
	unsigned int T, UT;

	T = 1000000000 / via_clock;

	switch (vdev->via_config->udma_mask) {
	case ATA_UDMA2: UT = T;   break;
	case ATA_UDMA4: UT = T/2; break;
	case ATA_UDMA5: UT = T/3; break;
	case ATA_UDMA6: UT = T/4; break;
	default:	UT = T;
	}

	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);
	}

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

/**
 *	via_set_pio_mode	-	set host controller for PIO mode
 *	@drive: drive
 *	@pio: PIO mode number
 *
 *	A callback from the upper layers for PIO-only tuning.
 */

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

static struct via_isa_bridge *via_config_find(struct pci_dev **isa)
{
	struct via_isa_bridge *via_config;

	for (via_config = via_isa_bridges; via_config->id; via_config++)
		if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
			!!(via_config->flags & VIA_BAD_ID),
			via_config->id, NULL))) {

			if ((*isa)->revision >= via_config->rev_min &&
			    (*isa)->revision <= via_config->rev_max)
				break;
			pci_dev_put(*isa);
		}

	return via_config;
}

/*
 * Check and handle 80-wire cable presence
 */
static void __devinit via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
{
	int i;

	switch (vdev->via_config->udma_mask) {
		case ATA_UDMA4:
			for (i = 24; i >= 0; i -= 8)
				if (((u >> (i & 16)) & 8) &&
				    ((u >> i) & 0x20) &&
				     (((u >> i) & 7) < 2)) {
					/*
					 * 2x PCI clock and
					 * UDMA w/ < 3T/cycle
					 */
					vdev->via_80w |= (1 << (1 - (i >> 4)));
				}
			break;

		case ATA_UDMA5:
			for (i = 24; i >= 0; i -= 8)
				if (((u >> i) & 0x10) ||
				    (((u >> i) & 0x20) &&
				     (((u >> i) & 7) < 4))) {
					/* BIOS 80-wire bit or
					 * UDMA w/ < 60ns/cycle
					 */
					vdev->via_80w |= (1 << (1 - (i >> 4)));
				}
			break;

		case ATA_UDMA6:
			for (i = 24; i >= 0; i -= 8)
				if (((u >> i) & 0x10) ||
				    (((u >> i) & 0x20) &&
				     (((u >> i) & 7) < 6))) {
					/* BIOS 80-wire bit or
					 * UDMA w/ < 60ns/cycle
					 */
					vdev->via_80w |= (1 << (1 - (i >> 4)));
				}
			break;
	}
}

/**
 *	init_chipset_via82cxxx	-	initialization handler
 *	@dev: PCI device
 *	@name: Name of interface
 *
 *	The initialization callback. Here we determine the IDE chip type
 *	and initialize its drive independent registers.
 */

static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev *dev, const char *name)
{
	struct ide_host *host = pci_get_drvdata(dev);
	struct via82cxxx_dev *vdev = host->host_priv;
	struct via_isa_bridge *via_config = vdev->via_config;
	u8 t, v;
	u32 u;

	/*
	 * Detect cable and configure Clk66
	 */
	pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);

	via_cable_detect(vdev, u);

	if (via_config->udma_mask == ATA_UDMA4) {
		/* Enable Clk66 */
		pci_write_config_dword(dev, VIA_UDMA_TIMING, u|0x80008);
	} else if (via_config->flags & VIA_BAD_CLK66) {
		/* Would cause trouble on 596a and 686 */
		pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
	}

	/*
	 * Check whether interfaces are enabled.
	 */

	pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);

	/*
	 * Set up FIFO sizes and thresholds.
	 */

	pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);

	/* Disable PREQ# till DDACK# */
	if (via_config->flags & VIA_BAD_PREQ) {
		/* Would crash on 586b rev 41 */
		t &= 0x7f;
	}

	/* Fix FIFO split between channels */
	if (via_config->flags & VIA_SET_FIFO) {
		t &= (t & 0x9f);
		switch (v & 3) {
			case 2: t |= 0x00; break;	/* 16 on primary */
			case 1: t |= 0x60; break;	/* 16 on secondary */
			case 3: t |= 0x20; break;	/* 8 pri 8 sec */
		}
	}

	pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);

	return 0;
}

/*
 *	Cable special cases
 */

static const struct dmi_system_id cable_dmi_table[] = {
	{
		.ident = "Acer Ferrari 3400",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
			DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
		},
	},
	{ }
};

static int via_cable_override(struct pci_dev *pdev)
{
	/* Systems by DMI */
	if (dmi_check_system(cable_dmi_table))
		return 1;

	/* Arima W730-K8/Targa Visionary 811/... */
	if (pdev->subsystem_vendor == 0x161F &&
	    pdev->subsystem_device == 0x2032)
		return 1;

	return 0;
}

static u8 __devinit via82cxxx_cable_detect(ide_hwif_t *hwif)
{
	struct pci_dev *pdev = to_pci_dev(hwif->dev);
	struct ide_host *host = pci_get_drvdata(pdev);
	struct via82cxxx_dev *vdev = host->host_priv;

	if (via_cable_override(pdev))
		return ATA_CBL_PATA40_SHORT;

	if ((vdev->via_80w >> hwif->channel) & 1)
		return ATA_CBL_PATA80;
	else
		return ATA_CBL_PATA40;
}

static const struct ide_port_ops via_port_ops = {
	.set_pio_mode		= via_set_pio_mode,
	.set_dma_mode		= via_set_drive,
	.cable_detect		= via82cxxx_cable_detect,
};

static const struct ide_port_info via82cxxx_chipset __devinitdata = {
	.name		= "VP_IDE",
	.init_chipset	= init_chipset_via82cxxx,
	.enablebits	= { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } },
	.port_ops	= &via_port_ops,
	.host_flags	= IDE_HFLAG_PIO_NO_BLACKLIST |
			  IDE_HFLAG_POST_SET_MODE |
			  IDE_HFLAG_IO_32BIT,
	.pio_mask	= ATA_PIO5,
	.swdma_mask	= ATA_SWDMA2,
	.mwdma_mask	= ATA_MWDMA2,
};

static int __devinit via_init_one(struct pci_dev *dev, const struct pci_device_id *id)
{
	struct pci_dev *isa = NULL;
	struct via_isa_bridge *via_config;
	struct via82cxxx_dev *vdev;
	int rc;
	u8 idx = id->driver_data;
	struct ide_port_info d;

	d = via82cxxx_chipset;

	/*
	 * Find the ISA bridge and check we know what it is.
	 */
	via_config = via_config_find(&isa);
	if (!via_config->id) {
		printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, disabling DMA.\n");
		return -ENODEV;
	}

	/*
	 * Print the boot message.
	 */
	printk(KERN_INFO "VP_IDE: VIA %s (rev %02x) IDE %sDMA%s "
		"controller on pci%s\n",
		via_config->name, isa->revision,
		via_config->udma_mask ? "U" : "MW",
		via_dma[via_config->udma_mask ?
			(fls(via_config->udma_mask) - 1) : 0],
		pci_name(dev));

	pci_dev_put(isa);

	/*
	 * Determine system bus clock.
	 */
	via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;

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

	if (via_clock < 20000 || via_clock > 50000) {
		printk(KERN_WARNING "VP_IDE: User given PCI clock speed "
			"impossible (%d), using 33 MHz instead.\n", via_clock);
		printk(KERN_WARNING "VP_IDE: Use ide0=ata66 if you want "
			"to assume 80-wire cable.\n");
		via_clock = 33333;
	}

	if (idx == 0)
		d.host_flags |= IDE_HFLAG_NO_AUTODMA;
	else
		d.enablebits[1].reg = d.enablebits[0].reg = 0;

	if ((via_config->flags & VIA_NO_UNMASK) == 0)
		d.host_flags |= IDE_HFLAG_UNMASK_IRQS;

#ifdef CONFIG_PPC_CHRP
	if (machine_is(chrp) && _chrp_type == _CHRP_Pegasos)
		d.host_flags |= IDE_HFLAG_FORCE_LEGACY_IRQS;
#endif

	d.udma_mask = via_config->udma_mask;

	vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
	if (!vdev) {
		printk(KERN_ERR "VP_IDE: out of memory :(\n");
		return -ENOMEM;
	}

	vdev->via_config = via_config;

	rc = ide_pci_init_one(dev, &d, vdev);
	if (rc)
		kfree(vdev);

	return rc;
}

static const struct pci_device_id via_pci_tbl[] = {
	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1),  0 },
	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1),  0 },
	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 },
	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410),      1 },
	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 },
	{ 0, },
};
MODULE_DEVICE_TABLE(pci, via_pci_tbl);

static struct pci_driver driver = {
	.name 		= "VIA_IDE",
	.id_table 	= via_pci_tbl,
	.probe 		= via_init_one,
};

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

module_init(via_ide_init);

MODULE_AUTHOR("Vojtech Pavlik, Michel Aubry, Jeff Garzik, Andre Hedrick");
MODULE_DESCRIPTION("PCI driver module for VIA IDE");
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* VIA IDE driver for Linux. Supported southbridges:
	3	*
	4	* vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b,
	5	* vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a,
a7dec1e0	6	* vt8235, vt8237, vt8237a
1da177e4 LT	7	*
1da177e4 LT	8	* Copyright (c) 2000-2002 Vojtech Pavlik
75b1d975	9	* Copyright (c) 2007 Bartlomiej Zolnierkiewicz
1da177e4 LT	10	*
	11	* Based on the work of:
	12	* Michel Aubry
	13	* Jeff Garzik
	14	* Andre Hedrick
	15	*
	16	* Documentation:
	17	* Obsolete device documentation publically available from via.com.tw
	18	* Current device documentation available under NDA only
	19	*/
	20
	21	/*
	22	* This program is free software; you can redistribute it and/or modify it
	23	* under the terms of the GNU General Public License version 2 as published by
	24	* the Free Software Foundation.
	25	*/
	26
1da177e4 LT	27	#include <linux/module.h>
1da177e4 LT	28	#include <linux/kernel.h>
1da177e4 LT	29	#include <linux/pci.h>
	30	#include <linux/init.h>
	31	#include <linux/ide.h>
bdab00b7 BZ	32	#include <linux/dmi.h>
bdab00b7 BZ	33
74a9d5f1	34	#ifdef CONFIG_PPC_CHRP
1da177e4 LT	35	#include <asm/processor.h>
	36	#endif
	37
1da177e4 LT	38	#define VIA_IDE_ENABLE 0x40
	39	#define VIA_IDE_CONFIG 0x41
	40	#define VIA_FIFO_CONFIG 0x43
	41	#define VIA_MISC_1 0x44
	42	#define VIA_MISC_2 0x45
	43	#define VIA_MISC_3 0x46
	44	#define VIA_DRIVE_TIMING 0x48
	45	#define VIA_8BIT_TIMING 0x4e
	46	#define VIA_ADDRESS_SETUP 0x4c
	47	#define VIA_UDMA_TIMING 0x50
	48
75b1d975 BZ	49	#define VIA_BAD_PREQ 0x01 /* Crashes if PREQ# till DDACK# set */
	50	#define VIA_BAD_CLK66 0x02 /* 66 MHz clock doesn't work correctly */
	51	#define VIA_SET_FIFO 0x04 /* Needs to have FIFO split set */
	52	#define VIA_NO_UNMASK 0x08 /* Doesn't work with IRQ unmasking on */
	53	#define VIA_BAD_ID 0x10 /* Has wrong vendor ID (0x1107) */
	54	#define VIA_BAD_AST 0x20 /* Don't touch Address Setup Timing */
1da177e4 LT	55
	56	/*
	57	* VIA SouthBridge chips.
	58	*/
	59
	60	static struct via_isa_bridge {
	61	char *name;
	62	u16 id;
	63	u8 rev_min;
	64	u8 rev_max;
75b1d975 BZ	65	u8 udma_mask;
75b1d975 BZ	66	u8 flags;
1da177e4	67	} via_isa_bridges[] = {
b311ec4a	68	{ "vx800", PCI_DEVICE_ID_VIA_VX800, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
75b1d975 BZ	69	{ "cx700", PCI_DEVICE_ID_VIA_CX700, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	70	{ "vt8237s", PCI_DEVICE_ID_VIA_8237S, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	71	{ "vt6410", PCI_DEVICE_ID_VIA_6410, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	72	{ "vt8251", PCI_DEVICE_ID_VIA_8251, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	73	{ "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	74	{ "vt8237a", PCI_DEVICE_ID_VIA_8237A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	75	{ "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	76	{ "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, ATA_UDMA6, VIA_BAD_AST },
	77	{ "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, ATA_UDMA5, },
	78	{ "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, ATA_UDMA5, },
	79	{ "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, ATA_UDMA5, },
	80	{ "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, ATA_UDMA5, },
	81	{ "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, ATA_UDMA4, },
	82	{ "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
	83	{ "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, ATA_UDMA4, },
	84	{ "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, ATA_UDMA2, VIA_BAD_CLK66 },
	85	{ "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, ATA_UDMA2, VIA_SET_FIFO },
	86	{ "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, ATA_UDMA2, VIA_SET_FIFO \| VIA_BAD_PREQ },
	87	{ "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, ATA_UDMA2, VIA_SET_FIFO },
	88	{ "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, ATA_UDMA2, VIA_SET_FIFO },
	89	{ "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, 0x00, VIA_SET_FIFO },
	90	{ "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO \| VIA_NO_UNMASK },
	91	{ "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, 0x00, VIA_SET_FIFO \| VIA_NO_UNMASK \| VIA_BAD_ID },
1da177e4 LT	92	{ NULL }
	93	};
	94
1da177e4	95	static unsigned int via_clock;
75b1d975	96	static char *via_dma[] = { "16", "25", "33", "44", "66", "100", "133" };
1da177e4	97
7462cbff DD	98	struct via82cxxx_dev
	99	{
	100	struct via_isa_bridge *via_config;
	101	unsigned int via_80w;
	102	};
	103
1da177e4 LT	104	/**
	105	* via_set_speed - write timing registers
	106	* @dev: PCI device
	107	* @dn: device
	108	* @timing: IDE timing data to use
	109	*
	110	* via_set_speed writes timing values to the chipset registers
	111	*/
	112
7462cbff	113	static void via_set_speed(ide_hwif_t hwif, u8 dn, struct ide_timing timing)
1da177e4	114	{
36501650	115	struct pci_dev *dev = to_pci_dev(hwif->dev);
ee77325b BZ	116	struct ide_host *host = pci_get_drvdata(dev);
ee77325b BZ	117	struct via82cxxx_dev *vdev = host->host_priv;
1da177e4 LT	118	u8 t;
1da177e4 LT	119
7462cbff	120	if (~vdev->via_config->flags & VIA_BAD_AST) {
1da177e4	121	pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
d6cddd3c	122	t = (t & ~(3 << ((3 - dn) << 1))) \| ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
1da177e4 LT	123	pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
	124	}
	125
	126	pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
d6cddd3c	127	((clamp_val(timing->act8b, 1, 16) - 1) << 4) \| (clamp_val(timing->rec8b, 1, 16) - 1));
1da177e4 LT	128
1da177e4 LT	129	pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
d6cddd3c	130	((clamp_val(timing->active, 1, 16) - 1) << 4) \| (clamp_val(timing->recover, 1, 16) - 1));
1da177e4	131
75b1d975	132	switch (vdev->via_config->udma_mask) {
d6cddd3c HH	133	case ATA_UDMA2: t = timing->udma ? (0xe0 \| (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
	134	case ATA_UDMA4: t = timing->udma ? (0xe8 \| (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break;
	135	case ATA_UDMA5: t = timing->udma ? (0xe0 \| (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
	136	case ATA_UDMA6: t = timing->udma ? (0xe0 \| (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
75b1d975	137	default: return;
1da177e4 LT	138	}
	139
	140	pci_write_config_byte(dev, VIA_UDMA_TIMING + (3 - dn), t);
	141	}
	142
	143	/**
	144	* via_set_drive - configure transfer mode
	145	* @drive: Drive to set up
	146	* @speed: desired speed
	147	*
88b2b32b BZ	148	* via_set_drive() computes timing values configures the chipset to
88b2b32b BZ	149	* a desired transfer mode. It also can be called by upper layers.
1da177e4 LT	150	*/
1da177e4 LT	151
88b2b32b	152	static void via_set_drive(ide_drive_t *drive, const u8 speed)
1da177e4	153	{
36501650 BZ	154	ide_hwif_t *hwif = drive->hwif;
	155	ide_drive_t *peer = hwif->drives + (~drive->dn & 1);
	156	struct pci_dev *dev = to_pci_dev(hwif->dev);
ee77325b BZ	157	struct ide_host *host = pci_get_drvdata(dev);
ee77325b BZ	158	struct via82cxxx_dev *vdev = host->host_priv;
1da177e4 LT	159	struct ide_timing t, p;
	160	unsigned int T, UT;
	161
1da177e4 LT	162	T = 1000000000 / via_clock;
1da177e4 LT	163
75b1d975 BZ	164	switch (vdev->via_config->udma_mask) {
	165	case ATA_UDMA2: UT = T; break;
	166	case ATA_UDMA4: UT = T/2; break;
	167	case ATA_UDMA5: UT = T/3; break;
	168	case ATA_UDMA6: UT = T/4; break;
	169	default: UT = T;
1da177e4 LT	170	}
	171
	172	ide_timing_compute(drive, speed, &t, T, UT);
	173
	174	if (peer->present) {
	175	ide_timing_compute(peer, peer->current_speed, &p, T, UT);
	176	ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
	177	}
	178
7462cbff	179	via_set_speed(HWIF(drive), drive->dn, &t);
1da177e4 LT	180	}
	181
	182	/**
88b2b32b	183	* via_set_pio_mode - set host controller for PIO mode
26bcb879 BZ	184	* @drive: drive
26bcb879 BZ	185	* @pio: PIO mode number
1da177e4 LT	186	*
	187	* A callback from the upper layers for PIO-only tuning.
	188	*/
	189
26bcb879	190	static void via_set_pio_mode(ide_drive_t *drive, const u8 pio)
1da177e4	191	{
26bcb879	192	via_set_drive(drive, XFER_PIO_0 + pio);
1da177e4 LT	193	}
1da177e4 LT	194
7462cbff DD	195	static struct via_isa_bridge via_config_find(struct pci_dev *isa)
	196	{
	197	struct via_isa_bridge *via_config;
7462cbff DD	198
7462cbff DD	199	for (via_config = via_isa_bridges; via_config->id; via_config++)
652aa162	200	if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
7462cbff DD	201	!!(via_config->flags & VIA_BAD_ID),
	202	via_config->id, NULL))) {
	203
44c10138 AK	204	if ((*isa)->revision >= via_config->rev_min &&
44c10138 AK	205	(*isa)->revision <= via_config->rev_max)
7462cbff	206	break;
652aa162	207	pci_dev_put(*isa);
7462cbff DD	208	}
	209
	210	return via_config;
1da177e4 LT	211	}
1da177e4 LT	212
cd36beec BZ	213	/*
	214	* Check and handle 80-wire cable presence
	215	*/
	216	static void __devinit via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
	217	{
	218	int i;
	219
75b1d975 BZ	220	switch (vdev->via_config->udma_mask) {
75b1d975 BZ	221	case ATA_UDMA4:
cd36beec BZ	222	for (i = 24; i >= 0; i -= 8)
	223	if (((u >> (i & 16)) & 8) &&
	224	((u >> i) & 0x20) &&
	225	(((u >> i) & 7) < 2)) {
	226	/*
	227	* 2x PCI clock and
	228	* UDMA w/ < 3T/cycle
	229	*/
	230	vdev->via_80w \|= (1 << (1 - (i >> 4)));
	231	}
	232	break;
	233
75b1d975	234	case ATA_UDMA5:
cd36beec BZ	235	for (i = 24; i >= 0; i -= 8)
	236	if (((u >> i) & 0x10) \|\|
	237	(((u >> i) & 0x20) &&
	238	(((u >> i) & 7) < 4))) {
	239	/* BIOS 80-wire bit or
	240	* UDMA w/ < 60ns/cycle
	241	*/
	242	vdev->via_80w \|= (1 << (1 - (i >> 4)));
	243	}
	244	break;
	245
75b1d975	246	case ATA_UDMA6:
cd36beec BZ	247	for (i = 24; i >= 0; i -= 8)
	248	if (((u >> i) & 0x10) \|\|
	249	(((u >> i) & 0x20) &&
	250	(((u >> i) & 7) < 6))) {
	251	/* BIOS 80-wire bit or
	252	* UDMA w/ < 60ns/cycle
	253	*/
	254	vdev->via_80w \|= (1 << (1 - (i >> 4)));
	255	}
	256	break;
	257	}
	258	}
	259
1da177e4 LT	260	/**
	261	* init_chipset_via82cxxx - initialization handler
	262	* @dev: PCI device
	263	* @name: Name of interface
	264	*
	265	* The initialization callback. Here we determine the IDE chip type
	266	* and initialize its drive independent registers.
	267	*/
	268
f3718d3e	269	static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev dev, const char name)
1da177e4	270	{
ee77325b BZ	271	struct ide_host *host = pci_get_drvdata(dev);
ee77325b BZ	272	struct via82cxxx_dev *vdev = host->host_priv;
37525beb	273	struct via_isa_bridge *via_config = vdev->via_config;
1da177e4	274	u8 t, v;
cd36beec BZ	275	u32 u;
cd36beec BZ	276
1da177e4	277	/*
cd36beec	278	* Detect cable and configure Clk66
1da177e4	279	*/
cd36beec BZ	280	pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
	281
	282	via_cable_detect(vdev, u);
1da177e4	283
75b1d975	284	if (via_config->udma_mask == ATA_UDMA4) {
7462cbff	285	/* Enable Clk66 */
7462cbff DD	286	pci_write_config_dword(dev, VIA_UDMA_TIMING, u\|0x80008);
7462cbff DD	287	} else if (via_config->flags & VIA_BAD_CLK66) {
1da177e4	288	/* Would cause trouble on 596a and 686 */
1da177e4 LT	289	pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
	290	}
	291
	292	/*
	293	* Check whether interfaces are enabled.
	294	*/
	295
	296	pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
	297
	298	/*
	299	* Set up FIFO sizes and thresholds.
	300	*/
	301
	302	pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
	303
	304	/* Disable PREQ# till DDACK# */
	305	if (via_config->flags & VIA_BAD_PREQ) {
	306	/* Would crash on 586b rev 41 */
	307	t &= 0x7f;
	308	}
	309
	310	/* Fix FIFO split between channels */
	311	if (via_config->flags & VIA_SET_FIFO) {
	312	t &= (t & 0x9f);
	313	switch (v & 3) {
	314	case 2: t \|= 0x00; break; /* 16 on primary */
	315	case 1: t \|= 0x60; break; /* 16 on secondary */
	316	case 3: t \|= 0x20; break; /* 8 pri 8 sec */
	317	}
	318	}
	319
	320	pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
	321
1da177e4 LT	322	return 0;
	323	}
	324
bdab00b7 BZ	325	/*
	326	* Cable special cases
	327	*/
	328
1855256c	329	static const struct dmi_system_id cable_dmi_table[] = {
bdab00b7 BZ	330	{
	331	.ident = "Acer Ferrari 3400",
	332	.matches = {
	333	DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
	334	DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
	335	},
	336	},
	337	{ }
	338	};
	339
58e47bb1	340	static int via_cable_override(struct pci_dev *pdev)
bdab00b7 BZ	341	{
	342	/* Systems by DMI */
	343	if (dmi_check_system(cable_dmi_table))
	344	return 1;
58e47bb1 BZ	345
	346	/* Arima W730-K8/Targa Visionary 811/... */
	347	if (pdev->subsystem_vendor == 0x161F &&
	348	pdev->subsystem_device == 0x2032)
	349	return 1;
	350
bdab00b7 BZ	351	return 0;
	352	}
	353
	354	static u8 __devinit via82cxxx_cable_detect(ide_hwif_t *hwif)
	355	{
36501650	356	struct pci_dev *pdev = to_pci_dev(hwif->dev);
ee77325b BZ	357	struct ide_host *host = pci_get_drvdata(pdev);
ee77325b BZ	358	struct via82cxxx_dev *vdev = host->host_priv;
bdab00b7	359
58e47bb1	360	if (via_cable_override(pdev))
bdab00b7 BZ	361	return ATA_CBL_PATA40_SHORT;
	362
	363	if ((vdev->via_80w >> hwif->channel) & 1)
	364	return ATA_CBL_PATA80;
	365	else
	366	return ATA_CBL_PATA40;
	367	}
	368
ac95beed BZ	369	static const struct ide_port_ops via_port_ops = {
	370	.set_pio_mode = via_set_pio_mode,
	371	.set_dma_mode = via_set_drive,
	372	.cable_detect = via82cxxx_cable_detect,
	373	};
1da177e4	374
85620436	375	static const struct ide_port_info via82cxxx_chipset __devinitdata = {
6157332e BZ	376	.name = "VP_IDE",
6157332e BZ	377	.init_chipset = init_chipset_via82cxxx,
6157332e	378	.enablebits = { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } },
ac95beed	379	.port_ops = &via_port_ops,
6157332e	380	.host_flags = IDE_HFLAG_PIO_NO_BLACKLIST \|
6157332e	381	IDE_HFLAG_POST_SET_MODE \|
5e71d9c5	382	IDE_HFLAG_IO_32BIT,
6157332e BZ	383	.pio_mask = ATA_PIO5,
	384	.swdma_mask = ATA_SWDMA2,
	385	.mwdma_mask = ATA_MWDMA2,
1da177e4 LT	386	};
	387
	388	static int __devinit via_init_one(struct pci_dev dev, const struct pci_device_id id)
	389	{
23a1b2a7 AC	390	struct pci_dev *isa = NULL;
23a1b2a7 AC	391	struct via_isa_bridge *via_config;
ee77325b BZ	392	struct via82cxxx_dev *vdev;
ee77325b BZ	393	int rc;
6157332e	394	u8 idx = id->driver_data;
039788e1	395	struct ide_port_info d;
6157332e BZ	396
6157332e BZ	397	d = via82cxxx_chipset;
8acf28c0	398
23a1b2a7 AC	399	/*
	400	* Find the ISA bridge and check we know what it is.
	401	*/
	402	via_config = via_config_find(&isa);
23a1b2a7 AC	403	if (!via_config->id) {
	404	printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, disabling DMA.\n");
	405	return -ENODEV;
	406	}
8acf28c0	407
37525beb BZ	408	/*
	409	* Print the boot message.
	410	*/
	411	printk(KERN_INFO "VP_IDE: VIA %s (rev %02x) IDE %sDMA%s "
	412	"controller on pci%s\n",
	413	via_config->name, isa->revision,
	414	via_config->udma_mask ? "U" : "MW",
	415	via_dma[via_config->udma_mask ?
	416	(fls(via_config->udma_mask) - 1) : 0],
	417	pci_name(dev));
	418
	419	pci_dev_put(isa);
	420
	421	/*
	422	* Determine system bus clock.
	423	*/
	424	via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
	425
	426	switch (via_clock) {
	427	case 33000: via_clock = 33333; break;
	428	case 37000: via_clock = 37500; break;
	429	case 41000: via_clock = 41666; break;
	430	}
	431
	432	if (via_clock < 20000 \|\| via_clock > 50000) {
	433	printk(KERN_WARNING "VP_IDE: User given PCI clock speed "
	434	"impossible (%d), using 33 MHz instead.\n", via_clock);
	435	printk(KERN_WARNING "VP_IDE: Use ide0=ata66 if you want "
	436	"to assume 80-wire cable.\n");
	437	via_clock = 33333;
	438	}
	439
6157332e BZ	440	if (idx == 0)
6157332e BZ	441	d.host_flags \|= IDE_HFLAG_NO_AUTODMA;
caea7602	442	else
6157332e BZ	443	d.enablebits[1].reg = d.enablebits[0].reg = 0;
	444
	445	if ((via_config->flags & VIA_NO_UNMASK) == 0)
	446	d.host_flags \|= IDE_HFLAG_UNMASK_IRQS;
caea7602	447
8acf28c0 BZ	448	#ifdef CONFIG_PPC_CHRP
8acf28c0 BZ	449	if (machine_is(chrp) && _chrp_type == _CHRP_Pegasos)
6157332e	450	d.host_flags \|= IDE_HFLAG_FORCE_LEGACY_IRQS;
8acf28c0 BZ	451	#endif
8acf28c0 BZ	452
6157332e	453	d.udma_mask = via_config->udma_mask;
8acf28c0	454
ee77325b BZ	455	vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
	456	if (!vdev) {
	457	printk(KERN_ERR "VP_IDE: out of memory :(\n");
	458	return -ENOMEM;
	459	}
	460
37525beb BZ	461	vdev->via_config = via_config;
37525beb BZ	462
ee77325b BZ	463	rc = ide_pci_init_one(dev, &d, vdev);
	464	if (rc)
	465	kfree(vdev);
	466
	467	return rc;
1da177e4 LT	468	}
1da177e4 LT	469
9cbcc5e3 BZ	470	static const struct pci_device_id via_pci_tbl[] = {
	471	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1), 0 },
	472	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1), 0 },
84f7e451	473	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 },
9cbcc5e3 BZ	474	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410), 1 },
9cbcc5e3 BZ	475	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 },
1da177e4 LT	476	{ 0, },
	477	};
	478	MODULE_DEVICE_TABLE(pci, via_pci_tbl);
	479
	480	static struct pci_driver driver = {
	481	.name = "VIA_IDE",
	482	.id_table = via_pci_tbl,
	483	.probe = via_init_one,
	484	};
	485
82ab1eec	486	static int __init via_ide_init(void)
1da177e4 LT	487	{
	488	return ide_pci_register_driver(&driver);
	489	}
	490
	491	module_init(via_ide_init);
	492
	493	MODULE_AUTHOR("Vojtech Pavlik, Michel Aubry, Jeff Garzik, Andre Hedrick");
	494	MODULE_DESCRIPTION("PCI driver module for VIA IDE");
	495	MODULE_LICENSE("GPL");