[GitHub/mt8127/android_kernel_alcatel_ttab.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 via82cxxx_dev *vdev = pci_get_drvdata(dev);
	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 via82cxxx_dev *vdev = pci_get_drvdata(dev);
	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 pci_dev *isa = NULL;
	struct via82cxxx_dev *vdev;
	struct via_isa_bridge *via_config;
	u8 t, v;
	u32 u;

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

	/*
	 * Find the ISA bridge to see how good the IDE is.
	 */
	vdev->via_config = via_config = via_config_find(&isa);

	/* We checked this earlier so if it fails here deeep badness
	   is involved */

	BUG_ON(!via_config->id);

	/*
	 * 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);

	/*
	 * 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;
	}

	/*
	 * 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);
	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 via82cxxx_dev *vdev = pci_get_drvdata(pdev);

	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;
	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);
	pci_dev_put(isa);
	if (!via_config->id) {
		printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, disabling DMA.\n");
		return -ENODEV;
	}

	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;

	return ide_pci_init_one(dev, &d, NULL);
}

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 BZ	115	struct pci_dev *dev = to_pci_dev(hwif->dev);
36501650 BZ	116	struct via82cxxx_dev *vdev = pci_get_drvdata(dev);
1da177e4 LT	117	u8 t;
1da177e4 LT	118
7462cbff	119	if (~vdev->via_config->flags & VIA_BAD_AST) {
1da177e4	120	pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
d6cddd3c	121	t = (t & ~(3 << ((3 - dn) << 1))) \| ((clamp_val(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
1da177e4 LT	122	pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
	123	}
	124
	125	pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
d6cddd3c	126	((clamp_val(timing->act8b, 1, 16) - 1) << 4) \| (clamp_val(timing->rec8b, 1, 16) - 1));
1da177e4 LT	127
1da177e4 LT	128	pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
d6cddd3c	129	((clamp_val(timing->active, 1, 16) - 1) << 4) \| (clamp_val(timing->recover, 1, 16) - 1));
1da177e4	130
75b1d975	131	switch (vdev->via_config->udma_mask) {
d6cddd3c HH	132	case ATA_UDMA2: t = timing->udma ? (0xe0 \| (clamp_val(timing->udma, 2, 5) - 2)) : 0x03; break;
	133	case ATA_UDMA4: t = timing->udma ? (0xe8 \| (clamp_val(timing->udma, 2, 9) - 2)) : 0x0f; break;
	134	case ATA_UDMA5: t = timing->udma ? (0xe0 \| (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
	135	case ATA_UDMA6: t = timing->udma ? (0xe0 \| (clamp_val(timing->udma, 2, 9) - 2)) : 0x07; break;
75b1d975	136	default: return;
1da177e4 LT	137	}
	138
	139	pci_write_config_byte(dev, VIA_UDMA_TIMING + (3 - dn), t);
	140	}
	141
	142	/**
	143	* via_set_drive - configure transfer mode
	144	* @drive: Drive to set up
	145	* @speed: desired speed
	146	*
88b2b32b BZ	147	* via_set_drive() computes timing values configures the chipset to
88b2b32b BZ	148	* a desired transfer mode. It also can be called by upper layers.
1da177e4 LT	149	*/
1da177e4 LT	150
88b2b32b	151	static void via_set_drive(ide_drive_t *drive, const u8 speed)
1da177e4	152	{
36501650 BZ	153	ide_hwif_t *hwif = drive->hwif;
	154	ide_drive_t *peer = hwif->drives + (~drive->dn & 1);
	155	struct pci_dev *dev = to_pci_dev(hwif->dev);
	156	struct via82cxxx_dev *vdev = pci_get_drvdata(dev);
1da177e4 LT	157	struct ide_timing t, p;
	158	unsigned int T, UT;
	159
1da177e4 LT	160	T = 1000000000 / via_clock;
1da177e4 LT	161
75b1d975 BZ	162	switch (vdev->via_config->udma_mask) {
	163	case ATA_UDMA2: UT = T; break;
	164	case ATA_UDMA4: UT = T/2; break;
	165	case ATA_UDMA5: UT = T/3; break;
	166	case ATA_UDMA6: UT = T/4; break;
	167	default: UT = T;
1da177e4 LT	168	}
	169
	170	ide_timing_compute(drive, speed, &t, T, UT);
	171
	172	if (peer->present) {
	173	ide_timing_compute(peer, peer->current_speed, &p, T, UT);
	174	ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT);
	175	}
	176
7462cbff	177	via_set_speed(HWIF(drive), drive->dn, &t);
1da177e4 LT	178	}
	179
	180	/**
88b2b32b	181	* via_set_pio_mode - set host controller for PIO mode
26bcb879 BZ	182	* @drive: drive
26bcb879 BZ	183	* @pio: PIO mode number
1da177e4 LT	184	*
	185	* A callback from the upper layers for PIO-only tuning.
	186	*/
	187
26bcb879	188	static void via_set_pio_mode(ide_drive_t *drive, const u8 pio)
1da177e4	189	{
26bcb879	190	via_set_drive(drive, XFER_PIO_0 + pio);
1da177e4 LT	191	}
1da177e4 LT	192
7462cbff DD	193	static struct via_isa_bridge via_config_find(struct pci_dev *isa)
	194	{
	195	struct via_isa_bridge *via_config;
7462cbff DD	196
7462cbff DD	197	for (via_config = via_isa_bridges; via_config->id; via_config++)
652aa162	198	if ((*isa = pci_get_device(PCI_VENDOR_ID_VIA +
7462cbff DD	199	!!(via_config->flags & VIA_BAD_ID),
	200	via_config->id, NULL))) {
	201
44c10138 AK	202	if ((*isa)->revision >= via_config->rev_min &&
44c10138 AK	203	(*isa)->revision <= via_config->rev_max)
7462cbff	204	break;
652aa162	205	pci_dev_put(*isa);
7462cbff DD	206	}
	207
	208	return via_config;
1da177e4 LT	209	}
1da177e4 LT	210
cd36beec BZ	211	/*
	212	* Check and handle 80-wire cable presence
	213	*/
	214	static void __devinit via_cable_detect(struct via82cxxx_dev *vdev, u32 u)
	215	{
	216	int i;
	217
75b1d975 BZ	218	switch (vdev->via_config->udma_mask) {
75b1d975 BZ	219	case ATA_UDMA4:
cd36beec BZ	220	for (i = 24; i >= 0; i -= 8)
	221	if (((u >> (i & 16)) & 8) &&
	222	((u >> i) & 0x20) &&
	223	(((u >> i) & 7) < 2)) {
	224	/*
	225	* 2x PCI clock and
	226	* UDMA w/ < 3T/cycle
	227	*/
	228	vdev->via_80w \|= (1 << (1 - (i >> 4)));
	229	}
	230	break;
	231
75b1d975	232	case ATA_UDMA5:
cd36beec BZ	233	for (i = 24; i >= 0; i -= 8)
	234	if (((u >> i) & 0x10) \|\|
	235	(((u >> i) & 0x20) &&
	236	(((u >> i) & 7) < 4))) {
	237	/* BIOS 80-wire bit or
	238	* UDMA w/ < 60ns/cycle
	239	*/
	240	vdev->via_80w \|= (1 << (1 - (i >> 4)));
	241	}
	242	break;
	243
75b1d975	244	case ATA_UDMA6:
cd36beec BZ	245	for (i = 24; i >= 0; i -= 8)
	246	if (((u >> i) & 0x10) \|\|
	247	(((u >> i) & 0x20) &&
	248	(((u >> i) & 7) < 6))) {
	249	/* BIOS 80-wire bit or
	250	* UDMA w/ < 60ns/cycle
	251	*/
	252	vdev->via_80w \|= (1 << (1 - (i >> 4)));
	253	}
	254	break;
	255	}
	256	}
	257
1da177e4 LT	258	/**
	259	* init_chipset_via82cxxx - initialization handler
	260	* @dev: PCI device
	261	* @name: Name of interface
	262	*
	263	* The initialization callback. Here we determine the IDE chip type
	264	* and initialize its drive independent registers.
	265	*/
	266
f3718d3e	267	static unsigned int __devinit init_chipset_via82cxxx(struct pci_dev dev, const char name)
1da177e4 LT	268	{
1da177e4 LT	269	struct pci_dev *isa = NULL;
cd36beec	270	struct via82cxxx_dev *vdev;
7462cbff	271	struct via_isa_bridge *via_config;
1da177e4	272	u8 t, v;
cd36beec BZ	273	u32 u;
	274
	275	vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
	276	if (!vdev) {
	277	printk(KERN_ERR "VP_IDE: out of memory :(\n");
	278	return -ENOMEM;
	279	}
	280	pci_set_drvdata(dev, vdev);
1da177e4 LT	281
	282	/*
	283	* Find the ISA bridge to see how good the IDE is.
	284	*/
cd36beec	285	vdev->via_config = via_config = via_config_find(&isa);
23a1b2a7 AC	286
	287	/* We checked this earlier so if it fails here deeep badness
	288	is involved */
	289
	290	BUG_ON(!via_config->id);
1da177e4 LT	291
1da177e4 LT	292	/*
cd36beec	293	* Detect cable and configure Clk66
1da177e4	294	*/
cd36beec BZ	295	pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
	296
	297	via_cable_detect(vdev, u);
1da177e4	298
75b1d975	299	if (via_config->udma_mask == ATA_UDMA4) {
7462cbff	300	/* Enable Clk66 */
7462cbff DD	301	pci_write_config_dword(dev, VIA_UDMA_TIMING, u\|0x80008);
7462cbff DD	302	} else if (via_config->flags & VIA_BAD_CLK66) {
1da177e4	303	/* Would cause trouble on 596a and 686 */
1da177e4 LT	304	pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008);
	305	}
	306
	307	/*
	308	* Check whether interfaces are enabled.
	309	*/
	310
	311	pci_read_config_byte(dev, VIA_IDE_ENABLE, &v);
	312
	313	/*
	314	* Set up FIFO sizes and thresholds.
	315	*/
	316
	317	pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
	318
	319	/* Disable PREQ# till DDACK# */
	320	if (via_config->flags & VIA_BAD_PREQ) {
	321	/* Would crash on 586b rev 41 */
	322	t &= 0x7f;
	323	}
	324
	325	/* Fix FIFO split between channels */
	326	if (via_config->flags & VIA_SET_FIFO) {
	327	t &= (t & 0x9f);
	328	switch (v & 3) {
	329	case 2: t \|= 0x00; break; /* 16 on primary */
	330	case 1: t \|= 0x60; break; /* 16 on secondary */
	331	case 3: t \|= 0x20; break; /* 8 pri 8 sec */
	332	}
	333	}
	334
	335	pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
	336
	337	/*
	338	* Determine system bus clock.
	339	*/
	340
30e5ee4d	341	via_clock = (ide_pci_clk ? ide_pci_clk : 33) * 1000;
1da177e4 LT	342
	343	switch (via_clock) {
	344	case 33000: via_clock = 33333; break;
	345	case 37000: via_clock = 37500; break;
	346	case 41000: via_clock = 41666; break;
	347	}
	348
	349	if (via_clock < 20000 \|\| via_clock > 50000) {
	350	printk(KERN_WARNING "VP_IDE: User given PCI clock speed "
	351	"impossible (%d), using 33 MHz instead.\n", via_clock);
	352	printk(KERN_WARNING "VP_IDE: Use ide0=ata66 if you want "
	353	"to assume 80-wire cable.\n");
	354	via_clock = 33333;
	355	}
	356
	357	/*
	358	* Print the boot message.
	359	*/
	360
75b1d975	361	printk(KERN_INFO "VP_IDE: VIA %s (rev %02x) IDE %sDMA%s "
1da177e4	362	"controller on pci%s\n",
44c10138	363	via_config->name, isa->revision,
75b1d975 BZ	364	via_config->udma_mask ? "U" : "MW",
	365	via_dma[via_config->udma_mask ?
	366	(fls(via_config->udma_mask) - 1) : 0],
1da177e4 LT	367	pci_name(dev));
1da177e4 LT	368
652aa162	369	pci_dev_put(isa);
1da177e4 LT	370	return 0;
	371	}
	372
bdab00b7 BZ	373	/*
	374	* Cable special cases
	375	*/
	376
1855256c	377	static const struct dmi_system_id cable_dmi_table[] = {
bdab00b7 BZ	378	{
	379	.ident = "Acer Ferrari 3400",
	380	.matches = {
	381	DMI_MATCH(DMI_BOARD_VENDOR, "Acer,Inc."),
	382	DMI_MATCH(DMI_BOARD_NAME, "Ferrari 3400"),
	383	},
	384	},
	385	{ }
	386	};
	387
58e47bb1	388	static int via_cable_override(struct pci_dev *pdev)
bdab00b7 BZ	389	{
	390	/* Systems by DMI */
	391	if (dmi_check_system(cable_dmi_table))
	392	return 1;
58e47bb1 BZ	393
	394	/* Arima W730-K8/Targa Visionary 811/... */
	395	if (pdev->subsystem_vendor == 0x161F &&
	396	pdev->subsystem_device == 0x2032)
	397	return 1;
	398
bdab00b7 BZ	399	return 0;
	400	}
	401
	402	static u8 __devinit via82cxxx_cable_detect(ide_hwif_t *hwif)
	403	{
36501650	404	struct pci_dev *pdev = to_pci_dev(hwif->dev);
58e47bb1	405	struct via82cxxx_dev *vdev = pci_get_drvdata(pdev);
bdab00b7	406
58e47bb1	407	if (via_cable_override(pdev))
bdab00b7 BZ	408	return ATA_CBL_PATA40_SHORT;
	409
	410	if ((vdev->via_80w >> hwif->channel) & 1)
	411	return ATA_CBL_PATA80;
	412	else
	413	return ATA_CBL_PATA40;
	414	}
	415
ac95beed BZ	416	static const struct ide_port_ops via_port_ops = {
	417	.set_pio_mode = via_set_pio_mode,
	418	.set_dma_mode = via_set_drive,
	419	.cable_detect = via82cxxx_cable_detect,
	420	};
1da177e4	421
85620436	422	static const struct ide_port_info via82cxxx_chipset __devinitdata = {
6157332e BZ	423	.name = "VP_IDE",
6157332e BZ	424	.init_chipset = init_chipset_via82cxxx,
6157332e	425	.enablebits = { { 0x40, 0x02, 0x02 }, { 0x40, 0x01, 0x01 } },
ac95beed	426	.port_ops = &via_port_ops,
6157332e	427	.host_flags = IDE_HFLAG_PIO_NO_BLACKLIST \|
6157332e	428	IDE_HFLAG_POST_SET_MODE \|
5e71d9c5	429	IDE_HFLAG_IO_32BIT,
6157332e BZ	430	.pio_mask = ATA_PIO5,
	431	.swdma_mask = ATA_SWDMA2,
	432	.mwdma_mask = ATA_MWDMA2,
1da177e4 LT	433	};
	434
	435	static int __devinit via_init_one(struct pci_dev dev, const struct pci_device_id id)
	436	{
23a1b2a7 AC	437	struct pci_dev *isa = NULL;
23a1b2a7 AC	438	struct via_isa_bridge *via_config;
6157332e	439	u8 idx = id->driver_data;
039788e1	440	struct ide_port_info d;
6157332e BZ	441
6157332e BZ	442	d = via82cxxx_chipset;
8acf28c0	443
23a1b2a7 AC	444	/*
	445	* Find the ISA bridge and check we know what it is.
	446	*/
	447	via_config = via_config_find(&isa);
	448	pci_dev_put(isa);
	449	if (!via_config->id) {
	450	printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, disabling DMA.\n");
	451	return -ENODEV;
	452	}
8acf28c0	453
6157332e BZ	454	if (idx == 0)
6157332e BZ	455	d.host_flags \|= IDE_HFLAG_NO_AUTODMA;
caea7602	456	else
6157332e BZ	457	d.enablebits[1].reg = d.enablebits[0].reg = 0;
	458
	459	if ((via_config->flags & VIA_NO_UNMASK) == 0)
	460	d.host_flags \|= IDE_HFLAG_UNMASK_IRQS;
caea7602	461
8acf28c0 BZ	462	#ifdef CONFIG_PPC_CHRP
8acf28c0 BZ	463	if (machine_is(chrp) && _chrp_type == _CHRP_Pegasos)
6157332e	464	d.host_flags \|= IDE_HFLAG_FORCE_LEGACY_IRQS;
8acf28c0 BZ	465	#endif
8acf28c0 BZ	466
6157332e	467	d.udma_mask = via_config->udma_mask;
8acf28c0	468
6cdf6eb3	469	return ide_pci_init_one(dev, &d, NULL);
1da177e4 LT	470	}
1da177e4 LT	471
9cbcc5e3 BZ	472	static const struct pci_device_id via_pci_tbl[] = {
	473	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C576_1), 0 },
	474	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_82C586_1), 0 },
84f7e451	475	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_CX700_IDE), 0 },
9cbcc5e3 BZ	476	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_6410), 1 },
9cbcc5e3 BZ	477	{ PCI_VDEVICE(VIA, PCI_DEVICE_ID_VIA_SATA_EIDE), 1 },
1da177e4 LT	478	{ 0, },
	479	};
	480	MODULE_DEVICE_TABLE(pci, via_pci_tbl);
	481
	482	static struct pci_driver driver = {
	483	.name = "VIA_IDE",
	484	.id_table = via_pci_tbl,
	485	.probe = via_init_one,
	486	};
	487
82ab1eec	488	static int __init via_ide_init(void)
1da177e4 LT	489	{
	490	return ide_pci_register_driver(&driver);
	491	}
	492
	493	module_init(via_ide_init);
	494
	495	MODULE_AUTHOR("Vojtech Pavlik, Michel Aubry, Jeff Garzik, Andre Hedrick");
	496	MODULE_DESCRIPTION("PCI driver module for VIA IDE");
	497	MODULE_LICENSE("GPL");