board_enable.c

/*
 * This file is part of the flashrom project.
 *
 * Copyright (C) 2005-2007 coresystems GmbH <stepan@coresystems.de>
 * Copyright (C) 2006 Uwe Hermann <uwe@hermann-uwe.de>
 * Copyright (C) 2007-2009 Luc Verhaegen <libv@skynet.be>
 * Copyright (C) 2007 Carl-Daniel Hailfinger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

/*
 * Contains the board specific flash enables.
 */

#include <string.h>
#include "flash.h"
#include "programmer.h"

#if defined(__i386__) || defined(__x86_64__)
/*
 * Helper functions for many Winbond Super I/Os of the W836xx range.
 */
/* Enter extended functions */
void w836xx_ext_enter(uint16_t port)
{
	OUTB(0x87, port);
	OUTB(0x87, port);
}

/* Leave extended functions */
void w836xx_ext_leave(uint16_t port)
{
	OUTB(0xAA, port);
}

/* Generic Super I/O helper functions */
uint8_t sio_read(uint16_t port, uint8_t reg)
{
	OUTB(reg, port);
	return INB(port + 1);
}

void sio_write(uint16_t port, uint8_t reg, uint8_t data)
{
	OUTB(reg, port);
	OUTB(data, port + 1);
}

void sio_mask(uint16_t port, uint8_t reg, uint8_t data, uint8_t mask)
{
	uint8_t tmp;

	OUTB(reg, port);
	tmp = INB(port + 1) & ~mask;
	OUTB(tmp | (data & mask), port + 1);
}

/* Not used yet. */
#if 0
static int enable_flash_decode_superio(void)
{
	int ret;
	uint8_t tmp;

	switch (superio.vendor) {
	case SUPERIO_VENDOR_NONE:
		ret = -1;
		break;
	case SUPERIO_VENDOR_ITE:
		enter_conf_mode_ite(superio.port);
		/* Enable flash mapping. Works for most old ITE style Super I/O. */
		tmp = sio_read(superio.port, 0x24);
		tmp |= 0xfc;
		sio_write(superio.port, 0x24, tmp);
		exit_conf_mode_ite(superio.port);
		ret = 0;
		break;
	default:
		msg_pdbg("Unhandled Super I/O type!\n");
		ret = -1;
		break;
	}
	return ret;
}
#endif

/**
 * SMSC FDC37B787: Raise GPIO50
 */
static int fdc37b787_gpio50_raise(uint16_t port)
{
	uint8_t id, val;

	OUTB(0x55, port);	/* enter conf mode */
	id = sio_read(port, 0x20);
	if (id != 0x44) {
		msg_perr("\nERROR: FDC37B787: Wrong ID 0x%02X.\n", id);
		OUTB(0xAA, port); /* leave conf mode */
		return -1;
	}

	sio_write(port, 0x07, 0x08);	/* Select Aux I/O subdevice */

	val = sio_read(port, 0xC8);	/* GP50 */
	if ((val & 0x1B) != 0x10)	/* output, no invert, GPIO */
	{
		msg_perr("\nERROR: GPIO50 mode 0x%02X unexpected.\n", val);
		OUTB(0xAA, port);
		return -1;
	}

	sio_mask(port, 0xF9, 0x01, 0x01);

	OUTB(0xAA, port);		/* Leave conf mode */
	return 0;
}

/**
 * Suited for Nokia IP530: Intel 440BX + PIIX4 + FDC37B787
 */
static int fdc37b787_gpio50_raise_3f0(void)
{
	return fdc37b787_gpio50_raise(0x3f0);
}

struct winbond_mux {
	uint8_t reg;		/* 0 if the corresponding pin is not muxed */
	uint8_t data;		/* reg/data/mask may be directly ... */
	uint8_t mask;		/* ... passed to sio_mask */
};

struct winbond_port {
	const struct winbond_mux *mux; /* NULL or pointer to mux info for the 8 bits */
	uint8_t ldn;		/* LDN this GPIO register is located in */
	uint8_t enable_bit;	/* bit in 0x30 of that LDN to enable 
	                           the GPIO port */
	uint8_t base;		/* base register in that LDN for the port */
};

struct winbond_chip {
	uint8_t device_id;	/* reg 0x20 of the expected w83626x */
	uint8_t gpio_port_count;
	const struct winbond_port *port;
};


#define UNIMPLEMENTED_PORT {NULL, 0, 0, 0}

enum winbond_id {
	WINBOND_W83627HF_ID = 0x52,
	WINBOND_W83627EHF_ID = 0x88,
	WINBOND_W83627THF_ID = 0x82,
};

static const struct winbond_mux w83627hf_port2_mux[8] = {
	{0x2A, 0x01, 0x01},	/* or MIDI */
	{0x2B, 0x80, 0x80},	/* or SPI */
	{0x2B, 0x40, 0x40},	/* or SPI */
	{0x2B, 0x20, 0x20},	/* or power LED */
	{0x2B, 0x10, 0x10},	/* or watchdog */
	{0x2B, 0x08, 0x08},	/* or infra red */
	{0x2B, 0x04, 0x04},	/* or infra red */
	{0x2B, 0x03, 0x03}	/* or IRQ1 input */
};

static const struct winbond_port w83627hf[3] = {
	UNIMPLEMENTED_PORT,
	{w83627hf_port2_mux, 0x08, 0, 0xF0},
	UNIMPLEMENTED_PORT
};

static const struct winbond_mux w83627ehf_port2_mux[8] = {
	{0x29, 0x06, 0x02},	/* or MIDI */
	{0x29, 0x06, 0x02},
	{0x24, 0x02, 0x00},	/* or SPI ROM interface */
	{0x24, 0x02, 0x00},
	{0x2A, 0x01, 0x01},	/* or keyboard/mouse interface */
	{0x2A, 0x01, 0x01},
	{0x2A, 0x01, 0x01},
	{0x2A, 0x01, 0x01}
};

static const struct winbond_port w83627ehf[6] = {
	UNIMPLEMENTED_PORT,
	{w83627ehf_port2_mux, 0x09, 0, 0xE3},
	UNIMPLEMENTED_PORT,
	UNIMPLEMENTED_PORT,
	UNIMPLEMENTED_PORT,
	UNIMPLEMENTED_PORT
};

static const struct winbond_mux w83627thf_port4_mux[8] = {
	{0x2D, 0x01, 0x01},	/* or watchdog or VID level strap */
	{0x2D, 0x02, 0x02},	/* or resume reset */
	{0x2D, 0x04, 0x04},	/* or S3 input */
	{0x2D, 0x08, 0x08},	/* or PSON# */
	{0x2D, 0x10, 0x10},	/* or PWROK */
	{0x2D, 0x20, 0x20},	/* or suspend LED */
	{0x2D, 0x40, 0x40},	/* or panel switch input */
	{0x2D, 0x80, 0x80}	/* or panel switch output */
};

static const struct winbond_port w83627thf[5] = {
	UNIMPLEMENTED_PORT,	/* GPIO1 */
	UNIMPLEMENTED_PORT,	/* GPIO2 */
	UNIMPLEMENTED_PORT,	/* GPIO3 */
	{w83627thf_port4_mux, 0x09, 1, 0xF4},
	UNIMPLEMENTED_PORT	/* GPIO5 */
};

static const struct winbond_chip winbond_chips[] = {
	{WINBOND_W83627HF_ID,  ARRAY_SIZE(w83627hf),  w83627hf },
	{WINBOND_W83627EHF_ID, ARRAY_SIZE(w83627ehf), w83627ehf},
	{WINBOND_W83627THF_ID, ARRAY_SIZE(w83627thf), w83627thf},
};

/* Detects which Winbond Super I/O is responding at the given base
   address, but takes no effort to make sure the chip is really a
   Winbond Super I/O */

static const struct winbond_chip * winbond_superio_detect(uint16_t base)
{
	uint8_t chipid;
	const struct winbond_chip * chip = NULL;
	int i;

	w836xx_ext_enter(base);
	chipid = sio_read(base, 0x20);
	for (i = 0; i < ARRAY_SIZE(winbond_chips); i++)
		if (winbond_chips[i].device_id == chipid)
		{
			chip = &winbond_chips[i];
			break;
		}
	
	w836xx_ext_leave(base);
	return chip;
}

/* The chipid parameter goes away as soon as we have Super I/O matching in the
   board enable table. The call to winbond_superio_detect goes away as
   soon as we have generic Super I/O detection code. */
static int winbond_gpio_set(uint16_t base, enum winbond_id chipid,
                            int pin, int raise)
{
	const struct winbond_chip * chip = NULL;
	const struct winbond_port * gpio;
	int port = pin / 10;
	int bit = pin % 10;

	chip = winbond_superio_detect(base);
	if (!chip) {
		msg_perr("\nERROR: No supported Winbond Super I/O found\n");
		return -1;
	}
	if (chip->device_id != chipid) {
		msg_perr("\nERROR: Found Winbond chip with ID 0x%x, "
		         "expected %x\n", chip->device_id, chipid);
		return -1;
	}
	if (bit >= 8 || port == 0 || port > chip->gpio_port_count) {
		msg_perr("\nERROR: winbond_gpio_set: Invalid GPIO number %d\n",
		         pin);
		return -1;
	}

	gpio = &chip->port[port - 1];

	if (gpio->ldn == 0) {
		msg_perr("\nERROR: GPIO%d is not supported yet on this"
		          " winbond chip\n", port);
		return -1;
	}

	w836xx_ext_enter(base);

	/* Select logical device */
	sio_write(base, 0x07, gpio->ldn);

	/* Activate logical device. */
	sio_mask(base, 0x30, 1 << gpio->enable_bit, 1 << gpio->enable_bit);

	/* Select GPIO function of that pin */
	if (gpio->mux && gpio->mux[bit].reg)
		sio_mask(base, gpio->mux[bit].reg,
		         gpio->mux[bit].data, gpio->mux[bit].mask);

	sio_mask(base, gpio->base + 0, 0, 1 << bit);	/* make pin output */
	sio_mask(base, gpio->base + 2, 0, 1 << bit);	/* Clear inversion */
	sio_mask(base, gpio->base + 1, raise << bit, 1 << bit);

	w836xx_ext_leave(base);

	return 0;
}

/**
 * Winbond W83627HF: Raise GPIO24.
 *
 * Suited for:
 *  - Agami Aruma
 *  - IWILL DK8-HTX
 */
static int w83627hf_gpio24_raise_2e()
{
	return winbond_gpio_set(0x2e, WINBOND_W83627HF_ID, 24, 1);
}

/**
 * Winbond W83627EHF: Raise GPIO24.
 *
 * Suited for:
 *  - ASUS A8N-VM CSM: AMD Socket 939 + GeForce 6150 (C51) + MCP51.
 */
static int w83627ehf_gpio24_raise_2e()
{
	return winbond_gpio_set(0x2e, WINBOND_W83627EHF_ID, 24, 1);
}

/**
 * Winbond W83627THF: Raise GPIO 44.
 *
 * Suited for:
 *  - MSI K8T Neo2-F
 */
static int w83627thf_gpio44_raise_2e()
{
	return winbond_gpio_set(0x2e, WINBOND_W83627THF_ID, 44, 1);
}

/**
 * Winbond W83627THF: Raise GPIO 44.
 *
 * Suited for:
 *  - MSI K8N Neo3
 */
static int w83627thf_gpio44_raise_4e()
{
	return winbond_gpio_set(0x4e, WINBOND_W83627THF_ID, 44, 1);
}

/**
 * Enable MEMW# and set ROM size to max.
 * Supported chips:
 * W83L517D, W83697HF/F/HG, W83697SF/UF/UG
 */
static void w836xx_memw_enable(uint16_t port)
{
	w836xx_ext_enter(port);
	if (!(sio_read(port, 0x24) & 0x02)) {	/* Flash ROM enabled? */
		/* Enable MEMW# and set ROM size select to max. (4M). */
		sio_mask(port, 0x24, 0x28, 0x28);
	}
	w836xx_ext_leave(port);
}

/**
 * Suited for:
 *   - EPoX EP-8K5A2: VIA KT333 + VT8235.
 *   - Albatron PM266A Pro: VIA P4M266A + VT8235.
 *   - Shuttle AK31 (all versions): VIA KT266 + VT8233.
 *   - ASUS A7V8X-MX SE and A7V400-MX: AMD K7 + VIA KM400A + VT8235
 *   - Tyan S2498 (Tomcat K7M): AMD Geode NX + VIA KM400 + VT8237.
 */
static int w836xx_memw_enable_2e(void)
{
	w836xx_memw_enable(0x2E);

	return 0;
}

/**
 * Suited for:
 *   - Termtek TK-3370 (rev. 2.5b)
 */
static int w836xx_memw_enable_4e(void)
{
	w836xx_memw_enable(0x4E);

	return 0;
}

/**
 * Suited for all boards with ITE IT8705F.
 * The SIS950 Super I/O probably requires a similar flash write enable.
 */
int it8705f_write_enable(uint8_t port)
{
	uint8_t tmp;
	int ret = 0;

	enter_conf_mode_ite(port);
	tmp = sio_read(port, 0x24);
	/* Check if at least one flash segment is enabled. */
	if (tmp & 0xf0) {
		/* The IT8705F will respond to LPC cycles and translate them. */
		buses_supported = CHIP_BUSTYPE_PARALLEL;
		/* Flash ROM I/F Writes Enable */
		tmp |= 0x04;
		msg_pdbg("Enabling IT8705F flash ROM interface write.\n");
		if (tmp & 0x02) {
			/* The data sheet contradicts itself about max size. */
			max_rom_decode.parallel = 1024 * 1024;
			msg_pinfo("IT8705F with very unusual settings. Please "
				  "send the output of \"flashrom -V\" to \n"
				  "flashrom@flashrom.org to help us finish "
				  "support for your Super I/O. Thanks.\n");
			ret = 1;
		} else if (tmp & 0x08) {
			max_rom_decode.parallel = 512 * 1024;
		} else {
			max_rom_decode.parallel = 256 * 1024;
		}
		/* Safety checks. The data sheet is unclear here: Segments 1+3
		 * overlap, no segment seems to cover top - 1MB to top - 512kB.
		 * We assume that certain combinations make no sense.
		 */
		if (((tmp & 0x02) && !(tmp & 0x08)) || /* 1 MB en, 512 kB dis */
		    (!(tmp & 0x10)) || /* 128 kB dis */
		    (!(tmp & 0x40))) { /*  256/512 kB dis */
			msg_perr("Inconsistent IT8705F decode size!\n");
			ret = 1;
		}
		if (sio_read(port, 0x25) != 0) {
			msg_perr("IT8705F flash data pins disabled!\n");
			ret = 1;
		}
		if (sio_read(port, 0x26) != 0) {
			msg_perr("IT8705F flash address pins 0-7 disabled!\n");
			ret = 1;
		}
		if (sio_read(port, 0x27) != 0) {
			msg_perr("IT8705F flash address pins 8-15 disabled!\n");
			ret = 1;
		}
		if ((sio_read(port, 0x29) & 0x10) != 0) {
			msg_perr("IT8705F flash write enable pin disabled!\n");
			ret = 1;
		}
		if ((sio_read(port, 0x29) & 0x08) != 0) {
			msg_perr("IT8705F flash chip select pin disabled!\n");
			ret = 1;
		}
		if ((sio_read(port, 0x29) & 0x04) != 0) {
			msg_perr("IT8705F flash read strobe pin disabled!\n");
			ret = 1;
		}
		if ((sio_read(port, 0x29) & 0x03) != 0) {
			msg_perr("IT8705F flash address pins 16-17 disabled!\n");
			/* Not really an error if you use flash chips smaller
			 * than 256 kByte, but such a configuration is unlikely.
			 */
			ret = 1;
		}
		msg_pdbg("Maximum IT8705F parallel flash decode size is %u.\n",
			max_rom_decode.parallel);
		if (ret) {
			msg_pinfo("Not enabling IT8705F flash write.\n");
		} else {
			sio_write(port, 0x24, tmp);
		}
	} else {
		msg_pdbg("No IT8705F flash segment enabled.\n");
		/* Not sure if this is an error or not. */
		ret = 0;
	}
	exit_conf_mode_ite(port);

	return ret;
}

static int pc87360_gpio_set(uint8_t gpio, int raise)
{
        static const int bankbase[] = {0, 4, 8, 10, 12};
        int gpio_bank = gpio / 8;
        int gpio_pin = gpio % 8;
        uint16_t baseport;
        uint8_t id, val;

        if (gpio_bank > 4) {
                msg_perr("PC87360: Invalid GPIO %d\n", gpio);
                return -1;
        }

        id = sio_read(0x2E, 0x20);
        if (id != 0xE1) {
                msg_perr("PC87360: unexpected ID %02x\n", id);
                return -1;
        }

        sio_write(0x2E, 0x07, 0x07);		/* Select GPIO device */
        baseport = (sio_read(0x2E, 0x60) << 8) | sio_read(0x2E, 0x61);
        if ((baseport & 0xFFF0) == 0xFFF0 || baseport == 0) {
                msg_perr("PC87360: invalid GPIO base address %04x\n",
                         baseport);
                return -1;
        }
        sio_mask (0x2E, 0x30, 0x01, 0x01);	/* Enable logical device */
        sio_write(0x2E, 0xF0, gpio_bank * 16 + gpio_pin);
        sio_mask (0x2E, 0xF1, 0x01, 0x01);	/* Make pin output */

        val = INB(baseport + bankbase[gpio_bank]);
        if (raise)
                val |= 1 << gpio_pin;
        else
                val &= ~(1 << gpio_pin);
        OUTB(val, baseport + bankbase[gpio_bank]);

        return 0;
}

/**
 * VT823x: Set one of the GPIO pins.
 */
static int via_vt823x_gpio_set(uint8_t gpio, int raise)
{
	struct pci_dev *dev;
	uint16_t base;
	uint8_t val, bit, offset;

	dev = pci_dev_find_vendorclass(0x1106, 0x0601);
	switch (dev->device_id) {
	case 0x3177:	/* VT8235 */
	case 0x3227:	/* VT8237R */
	case 0x3337:	/* VT8237A */
		break;
	default:
		msg_perr("\nERROR: VT823x ISA bridge not found.\n");
		return -1;
	}

	if ((gpio >= 12) && (gpio <= 15)) {
		/* GPIO12-15 -> output */
		val = pci_read_byte(dev, 0xE4);
		val |= 0x10;
		pci_write_byte(dev, 0xE4, val);
	} else if (gpio == 9) {
		/* GPIO9 -> Output */
		val = pci_read_byte(dev, 0xE4);
		val |= 0x20;
		pci_write_byte(dev, 0xE4, val);
	} else if (gpio == 5) {
		val = pci_read_byte(dev, 0xE4);
		val |= 0x01;
		pci_write_byte(dev, 0xE4, val);
	} else {
		msg_perr("\nERROR: "
			"VT823x GPIO%02d is not implemented.\n", gpio);
		return -1;
	}

	/* We need the I/O Base Address for this board's flash enable. */
	base = pci_read_word(dev, 0x88) & 0xff80;

	offset = 0x4C + gpio / 8;
	bit = 0x01 << (gpio % 8);

	val = INB(base + offset);
	if (raise)
		val |= bit;
	else
		val &= ~bit;
	OUTB(val, base + offset);

	return 0;
}

/**
 * Suited for ASUS M2V-MX: VIA K8M890 + VT8237A + IT8716F
 */
static int via_vt823x_gpio5_raise(void)
{
	/* On M2V-MX: GPO5 is connected to WP# and TBL#. */
	return via_vt823x_gpio_set(5, 1);
}

/**
 * Suited for VIA EPIA EK & N & NL.
 */
static int via_vt823x_gpio9_raise(void)
{
	return via_vt823x_gpio_set(9, 1);
}

/**
 * Suited for VIA EPIA M and MII, and maybe other CLE266 based EPIAs.
 *
 * We don't need to do this for EPIA M when using coreboot, GPIO15 is never
 * lowered there.
 */
static int via_vt823x_gpio15_raise(void)
{
	return via_vt823x_gpio_set(15, 1);
}

/**
 * Winbond W83697HF Super I/O + VIA VT8235 southbridge
 *
 * Suited for:
 *   - MSI KT4V and KT4V-L: AMD K7 + VIA KT400 + VT8235
 *   - MSI KT4 Ultra: AMD K7 + VIA KT400 + VT8235
 */
static int board_msi_kt4v(void)
{
	int ret;

	ret = via_vt823x_gpio_set(12, 1);
	w836xx_memw_enable(0x2E);

	return ret;
}

/**
 * Suited for ASUS P5A.
 *
 * This is rather nasty code, but there's no way to do this cleanly.
 * We're basically talking to some unknown device on SMBus, my guess
 * is that it is the Winbond W83781D that lives near the DIP BIOS.
 */
static int board_asus_p5a(void)
{
	uint8_t tmp;
	int i;

#define ASUSP5A_LOOP 5000

	OUTB(0x00, 0xE807);
	OUTB(0xEF, 0xE803);

	OUTB(0xFF, 0xE800);

	for (i = 0; i < ASUSP5A_LOOP; i++) {
		OUTB(0xE1, 0xFF);
		if (INB(0xE800) & 0x04)
			break;
	}

	if (i == ASUSP5A_LOOP) {
		msg_perr("Unable to contact device.\n");
		return -1;
	}

	OUTB(0x20, 0xE801);
	OUTB(0x20, 0xE1);

	OUTB(0xFF, 0xE802);

	for (i = 0; i < ASUSP5A_LOOP; i++) {
		tmp = INB(0xE800);
		if (tmp & 0x70)
			break;
	}

	if ((i == ASUSP5A_LOOP) || !(tmp & 0x10)) {
		msg_perr("Failed to read device.\n");
		return -1;
	}

	tmp = INB(0xE804);
	tmp &= ~0x02;

	OUTB(0x00, 0xE807);
	OUTB(0xEE, 0xE803);

	OUTB(tmp, 0xE804);

	OUTB(0xFF, 0xE800);
	OUTB(0xE1, 0xFF);

	OUTB(0x20, 0xE801);
	OUTB(0x20, 0xE1);

	OUTB(0xFF, 0xE802);

	for (i = 0; i < ASUSP5A_LOOP; i++) {
		tmp = INB(0xE800);
		if (tmp & 0x70)
			break;
	}

	if ((i == ASUSP5A_LOOP) || !(tmp & 0x10)) {
		msg_perr("Failed to write to device.\n");
		return -1;
	}

	return 0;
}

/*
 * Set GPIO lines in the Broadcom HT-1000 southbridge.
 *
 *  It's not a Super I/O but it uses the same index/data port method.
 */
static int board_hp_dl145_g3_enable(void)
{
	/* GPIO 0 reg from PM regs */
	/* Set GPIO 2 and 5 high, connected to flash WP# and TBL# pins. */
	sio_mask(0xcd6, 0x44, 0x24, 0x24);

	return 0;
}

/*
 * Set GPIO lines in the Broadcom HT-1000 southbridge.
 *
 *  It's not a Super I/O but it uses the same index/data port method.
 */
static int board_hp_dl165_g6_enable(void)
{
	/* Variant of DL145, with slightly different pin placement. */
	sio_mask(0xcd6, 0x44, 0x80, 0x80); /* TBL# */
	sio_mask(0xcd6, 0x46, 0x04, 0x04); /* WP# */

	return 0;
}

static int board_ibm_x3455(void)
{
	/* raise gpio13 */
	sio_mask(0xcd6, 0x45, 0x20, 0x20);

	return 0;
}

/**
 * Suited for Shuttle FN25 (SN25P): AMD S939 + NVIDIA CK804 (nForce4).
 */
static int board_shuttle_fn25(void)
{
	struct pci_dev *dev;

	dev = pci_dev_find(0x10DE, 0x0050);	/* NVIDIA CK804 ISA Bridge. */
	if (!dev) {
		msg_perr("\nERROR: NVIDIA nForce4 ISA bridge not found.\n");
		return -1;
	}

	/* one of those bits seems to be connected to TBL#, but -ENOINFO. */
	pci_write_byte(dev, 0x92, 0);

	return 0;
}

/**
 * Very similar to AMD 8111 IO Hub.
 */
static int nvidia_mcp_gpio_set(int gpio, int raise)
{
	struct pci_dev *dev;
	uint16_t base;
	uint16_t devclass;
	uint8_t tmp;

	if ((gpio < 0) || (gpio >= 0x40)) {
		msg_perr("\nERROR: unsupported GPIO: %d.\n", gpio);
		return -1;
	}

	/* First, check the ISA Bridge */
	dev = pci_dev_find_vendorclass(0x10DE, 0x0601);
	switch (dev->device_id) {
	case 0x0030: /* CK804 */
	case 0x0050: /* MCP04 */
	case 0x0060: /* MCP2 */
	case 0x00E0: /* CK8 */
		break;
	case 0x0260: /* MCP51 */
	case 0x0364: /* MCP55 */
		/* find SMBus controller on *this* southbridge */
		/* The infamous Tyan S2915-E has two south bridges; they are
		   easily told apart from each other by the class of the 
		   LPC bridge, but have the same SMBus bridge IDs */
		if (dev->func != 0) {
			msg_perr("MCP LPC bridge at unexpected function"
			         " number %d\n", dev->func);
			return -1;
		}

#if PCI_LIB_VERSION >= 0x020200
		dev = pci_get_dev(pacc, dev->domain, dev->bus, dev->dev, 1);
#else
		/* pciutils/libpci before version 2.2 is too old to support
		 * PCI domains. Such old machines usually don't have domains
		 * besides domain 0, so this is not a problem.
		 */
		dev = pci_get_dev(pacc, dev->bus, dev->dev, 1);
#endif
		if (!dev) {
			msg_perr("MCP SMBus controller could not be found\n");
			return -1;
		}
		devclass = pci_read_word(dev, PCI_CLASS_DEVICE);
		if (devclass != 0x0C05) {
			msg_perr("Unexpected device class %04x for SMBus"
			         " controller\n", devclass);
			return -1;
		}
		break;
	default:
		msg_perr("\nERROR: no NVIDIA LPC/SMBus controller found.\n");
		return -1;
	}

	base = pci_read_long(dev, 0x64) & 0x0000FF00; /* System control area */
	base += 0xC0;

	tmp = INB(base + gpio);
	tmp &= ~0x0F; /* null lower nibble */
	tmp |= 0x04; /* gpio -> output. */
	if (raise)
		tmp |= 0x01;
	OUTB(tmp, base + gpio);

	return 0;
}

/**
 * Suited for ASUS A8N-LA: nVidia MCP51.
 * Suited for ASUS M2NBP-VM CSM: NVIDIA MCP51.
 */
static int nvidia_mcp_gpio0_raise(void)
{
	return nvidia_mcp_gpio_set(0x00, 1);
}

/**
 * Suited for Abit KN8 Ultra: nVidia CK804.
 */
static int nvidia_mcp_gpio2_lower(void)
{
	return nvidia_mcp_gpio_set(0x02, 0);
}

/**
 * Suited for MSI K8N Neo4: NVIDIA CK804.
 * Suited for MSI K8N GM2-L: NVIDIA MCP51.
 */
static int nvidia_mcp_gpio2_raise(void)
{
	return nvidia_mcp_gpio_set(0x02, 1);
}


/**
 * Suited for HP xw9400 (Tyan S2915-E OEM): Dual(!) nVidia MCP55.
 *   Notes: a) There are two MCP55 chips, so also two SMBus bridges on that
 *             board. We can't tell the SMBus logical devices apart, but we
 *             can tell the LPC bridge functions apart.
 *             We need to choose the SMBus bridge next to the LPC bridge with
 *             ID 0x364 and the "LPC bridge" class.
 *          b) #TBL is hardwired on that board to a pull-down. It can be
 *             overridden by connecting the two solder points next to F2.
 */
static int nvidia_mcp_gpio5_raise(void)
{
	return nvidia_mcp_gpio_set(0x05, 1);
}

/**
 * Suited for Abit NF7-S: NVIDIA CK804.
 */
static int nvidia_mcp_gpio8_raise(void)
{
	return nvidia_mcp_gpio_set(0x08, 1);
}

/**
 * Suited for MSI K8N Neo2 Platinum: Socket 939 + nForce3 Ultra + CK8.
 */
static int nvidia_mcp_gpio0c_raise(void)
{
	return nvidia_mcp_gpio_set(0x0c, 1);
}

/**
 * Suited for abit NF-M2 nView: Socket AM2 + NVIDIA MCP51.
 */
static int nvidia_mcp_gpio4_lower(void)
{
	return nvidia_mcp_gpio_set(0x04, 0);
}

/**
 * Suited for ASUS P5ND2-SLI Deluxe: LGA775 + nForce4 SLI + MCP04.
 */
static int nvidia_mcp_gpio10_raise(void)
{
	return nvidia_mcp_gpio_set(0x10, 1);
}

/**
 * Suited for the Gigabyte GA-K8N-SLI: CK804 southbridge.
 */
static int nvidia_mcp_gpio21_raise(void)
{
	return nvidia_mcp_gpio_set(0x21, 0x01);
}

/**
 * Suited for EPoX EP-8RDA3+: Socket A + nForce2 Ultra 400 + MCP2.
 */
static int nvidia_mcp_gpio31_raise(void)
{
	return nvidia_mcp_gpio_set(0x31, 0x01);
}

/**
 * Suited for Artec Group DBE61 and DBE62.
 */
static int board_artecgroup_dbe6x(void)
{
#define DBE6x_MSR_DIVIL_BALL_OPTS	0x51400015
#define DBE6x_PRI_BOOT_LOC_SHIFT	(2)
#define DBE6x_BOOT_OP_LATCHED_SHIFT	(8)
#define DBE6x_SEC_BOOT_LOC_SHIFT	(10)
#define DBE6x_PRI_BOOT_LOC		(3 << DBE6x_PRI_BOOT_LOC_SHIFT)
#define DBE6x_BOOT_OP_LATCHED		(3 << DBE6x_BOOT_OP_LATCHED_SHIFT)
#define DBE6x_SEC_BOOT_LOC		(3 << DBE6x_SEC_BOOT_LOC_SHIFT)
#define DBE6x_BOOT_LOC_FLASH		(2)
#define DBE6x_BOOT_LOC_FWHUB		(3)

	msr_t msr;
	unsigned long boot_loc;

	/* Geode only has a single core */
	if (setup_cpu_msr(0))
		return -1;

	msr = rdmsr(DBE6x_MSR_DIVIL_BALL_OPTS);

	if ((msr.lo & (DBE6x_BOOT_OP_LATCHED)) ==
	    (DBE6x_BOOT_LOC_FWHUB << DBE6x_BOOT_OP_LATCHED_SHIFT))
		boot_loc = DBE6x_BOOT_LOC_FWHUB;
	else
		boot_loc = DBE6x_BOOT_LOC_FLASH;

	msr.lo &= ~(DBE6x_PRI_BOOT_LOC | DBE6x_SEC_BOOT_LOC);
	msr.lo |= ((boot_loc << DBE6x_PRI_BOOT_LOC_SHIFT) |
		   (boot_loc << DBE6x_SEC_BOOT_LOC_SHIFT));

	wrmsr(DBE6x_MSR_DIVIL_BALL_OPTS, msr);

	cleanup_cpu_msr();

	return 0;
}

/**
 * Helper function to raise/drop a given gpo line on Intel PIIX4{,E,M}.
 */
static int intel_piix4_gpo_set(unsigned int gpo, int raise)
{
	unsigned int gpo_byte, gpo_bit;
	struct pci_dev *dev;
	uint32_t tmp, base;

	dev = pci_dev_find(0x8086, 0x7110);	/* Intel PIIX4 ISA bridge */
	if (!dev) {
		msg_perr("\nERROR: Intel PIIX4 ISA bridge not found.\n");
		return -1;
	}

	/* sanity check */
	if (gpo > 30) {
		msg_perr("\nERROR: Intel PIIX4 has no GPO%d.\n", gpo);
		return -1;
	}

	/* these are dual function pins which are most likely in use already */
	if (((gpo >= 1) && (gpo <= 7)) ||
	    ((gpo >= 9) && (gpo <= 21)) || (gpo == 29)) {
		msg_perr("\nERROR: Unsupported PIIX4 GPO%d.\n", gpo);
		return -1;
	}

	/* dual function that need special enable. */
	if ((gpo >= 22) && (gpo <= 26)) {
		tmp = pci_read_long(dev, 0xB0); /* GENCFG */
		switch (gpo) {
		case 22: /* XBUS: XDIR#/GPO22 */
		case 23: /* XBUS: XOE#/GPO23 */
			tmp |= 1 << 28;
			break;
		case 24: /* RTCSS#/GPO24 */
			tmp |= 1 << 29;
			break;
		case 25: /* RTCALE/GPO25 */
			tmp |= 1 << 30;
			break;
		case 26: /* KBCSS#/GPO26 */
			tmp |= 1 << 31;
			break;
		}
		pci_write_long(dev, 0xB0, tmp);
	}

	/* GPO {0,8,27,28,30} are always available. */

	dev = pci_dev_find(0x8086, 0x7113);	/* Intel PIIX4 PM */
	if (!dev) {
		msg_perr("\nERROR: Intel PIIX4 PM not found.\n");
		return -1;
	}

	/* PM IO base */
	base = pci_read_long(dev, 0x40) & 0x0000FFC0;

	gpo_byte = gpo >> 3;
	gpo_bit = gpo & 7;
	tmp = INB(base + 0x34 + gpo_byte); /* GPO register */
	if (raise)
		tmp |= 0x01 << gpo_bit;
	else
		tmp &= ~(0x01 << gpo_bit);
	OUTB(tmp, base + 0x34 + gpo_byte);

	return 0;
}

/**
 * Suited for EPoX EP-BX3, and maybe some other Intel 440BX based boards.
 */
static int board_epox_ep_bx3(void)
{
	return intel_piix4_gpo_set(22, 1);
}

/**
 * Suited for Intel SE440BX-2
 */
static int intel_piix4_gpo27_lower(void)
{
        return intel_piix4_gpo_set(27, 0);
}

/**
 * Set a GPIO line on a given Intel ICH LPC controller.
 */
static int intel_ich_gpio_set(int gpio, int raise)
{
	/* Table mapping the different Intel ICH LPC chipsets. */
	static struct {
		uint16_t id;
		uint8_t base_reg;
		uint32_t bank0;
		uint32_t bank1;
		uint32_t bank2;
	} intel_ich_gpio_table[] = {
		{0x2410, 0x58, 0x0FE30000,          0,          0}, /* 82801AA (ICH) */
		{0x2420, 0x58, 0x0FE30000,          0,          0}, /* 82801AB (ICH0) */
		{0x2440, 0x58, 0x1BFF391B,          0,          0}, /* 82801BA (ICH2) */
		{0x244C, 0x58, 0x1A23399B,          0,          0}, /* 82801BAM (ICH2M) */
		{0x2450, 0x58, 0x1BFF0000,          0,          0}, /* 82801E (C-ICH) */
		{0x2480, 0x58, 0x1BFF0000, 0x00000FFF,          0}, /* 82801CA (ICH3-S) */
		{0x248C, 0x58, 0x1A230000, 0x00000FFF,          0}, /* 82801CAM (ICH3-M) */
		{0x24C0, 0x58, 0x1BFF0000, 0x00000FFF,          0}, /* 82801DB/DBL (ICH4/ICH4-L) */
		{0x24CC, 0x58, 0x1A030000, 0x00000FFF,          0}, /* 82801DBM (ICH4-M) */
		{0x24D0, 0x58, 0x1BFF0000, 0x00030305,          0}, /* 82801EB/ER (ICH5/ICH5R) */
		{0x2640, 0x48, 0x1BFF0000, 0x00030307,          0}, /* 82801FB/FR (ICH6/ICH6R) */
		{0x2641, 0x48, 0x1BFF0000, 0x00030307,          0}, /* 82801FBM (ICH6M) */
		{0x27B8, 0x48, 0xFFFFFFFF, 0x000300FF,          0}, /* 82801GB/GR (ICH7 Family) */
		{0x27B9, 0x48, 0xFFEBFFFE, 0x000300FE,          0}, /* 82801GBM (ICH7-M) */
		{0x27BD, 0x48, 0xFFEBFFFE, 0x000300FE,          0}, /* 82801GHM (ICH7-M DH) */
		{0x2810, 0x48, 0xFFFFFFFF, 0x00FF0FFF,          0}, /* 82801HB/HR (ICH8/R) */
		{0x2811, 0x48, 0xFFFFFFFF, 0x00FF0FFF,          0}, /* 82801HBM (ICH8M-E) */
		{0x2812, 0x48, 0xFFFFFFFF, 0x00FF0FFF,          0}, /* 82801HH (ICH8DH) */
		{0x2814, 0x48, 0xFFFFFFFF, 0x00FF0FFF,          0}, /* 82801HO (ICH8DO) */
		{0x2815, 0x48, 0xFFFFFFFF, 0x00FF0FFF,          0}, /* 82801HEM (ICH8M) */
		{0x2912, 0x48, 0xFFFFFFFF, 0x00FFFFFF,          0}, /* 82801IH (ICH9DH) */
		{0x2914, 0x48, 0xFFFFFFFF, 0x00FFFFFF,          0}, /* 82801IO (ICH9DO) */
		{0x2916, 0x48, 0xFFFFFFFF, 0x00FFFFFF,          0}, /* 82801IR (ICH9R) */
		{0x2917, 0x48, 0xFFFFFFFF, 0x00FFFFFF,          0}, /* 82801IEM (ICH9M-E) */
		{0x2918, 0x48, 0xFFFFFFFF, 0x00FFFFFF,          0}, /* 82801IB (ICH9) */
		{0x2919, 0x48, 0xFFFFFFFF, 0x00FFFFFF,          0}, /* 82801IBM (ICH9M) */
		{0x3A14, 0x48, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000100}, /* 82801JDO (ICH10DO) */
		{0x3A16, 0x48, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000100}, /* 82801JIR (ICH10R) */
		{0x3A18, 0x48, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000100}, /* 82801JIB (ICH10) */
		{0x3A1A, 0x48, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000100}, /* 82801JD (ICH10D) */
		{0, 0, 0, 0, 0} /* end marker */
	};

	struct pci_dev *dev;
	uint16_t base;
	uint32_t tmp;
	int i, allowed;

	/* First, look for a known LPC bridge */
	for (dev = pacc->devices; dev; dev = dev->next) {
		uint16_t device_class;
		/* libpci before version 2.2.4 does not store class info. */
		device_class = pci_read_word(dev, PCI_CLASS_DEVICE);
		if ((dev->vendor_id == 0x8086) &&
		    (device_class == 0x0601)) { /* ISA Bridge */
			/* Is this device in our list? */
			for (i = 0; intel_ich_gpio_table[i].id; i++)
				if (dev->device_id == intel_ich_gpio_table[i].id)
					break;

			if (intel_ich_gpio_table[i].id)
				break;
		}
	}

	if (!dev) {
		msg_perr("\nERROR: No Known Intel LPC Bridge found.\n");
		return -1;
	}

	/* According to the datasheets, all Intel ICHs have the GPIO bar 5:1
	   strapped to zero. From some mobile ICH9 version on, this becomes
	   6:1. The mask below catches all. */
	base = pci_read_word(dev, intel_ich_gpio_table[i].base_reg) & 0xFFC0;

	/* check whether the line is allowed */
	if (gpio < 32)
		allowed = (intel_ich_gpio_table[i].bank0 >> gpio) & 0x01;
	else if (gpio < 64)
		allowed = (intel_ich_gpio_table[i].bank1 >> (gpio - 32)) & 0x01;
	else
		allowed = (intel_ich_gpio_table[i].bank2 >> (gpio - 64)) & 0x01;

	if (!allowed) {
		msg_perr("\nERROR: This Intel LPC Bridge does not allow"
			" setting GPIO%02d\n", gpio);
		return -1;
	}

	msg_pdbg("\nIntel ICH LPC Bridge: %sing GPIO%02d.\n",
	       raise ? "Rais" : "Dropp", gpio);

	if (gpio < 32) {
		/* Set line to GPIO */
		tmp = INL(base);
		/* ICH/ICH0 multiplexes 27/28 on the line set. */
		if ((gpio == 28) &&
		    ((dev->device_id == 0x2410) || (dev->device_id == 0x2420)))
			tmp |= 1 << 27;
		else
			tmp |= 1 << gpio;
		OUTL(tmp, base);

		/* As soon as we are talking to ICH8 and above, this register
		   decides whether we can set the gpio or not. */
		if (dev->device_id > 0x2800) {
			tmp = INL(base);
			if (!(tmp & (1 << gpio))) {
				msg_perr("\nERROR: This Intel LPC Bridge"
					" does not allow setting GPIO%02d\n",
					gpio);
				return -1;
			}
		}

		/* Set GPIO to OUTPUT */
		tmp = INL(base + 0x04);
		tmp &= ~(1 << gpio);
		OUTL(tmp, base + 0x04);

		/* Raise GPIO line */
		tmp = INL(base + 0x0C);
		if (raise)
			tmp |= 1 << gpio;
		else
			tmp &= ~(1 << gpio);
		OUTL(tmp, base + 0x0C);
	} else if (gpio < 64) {
		gpio -= 32;

		/* Set line to GPIO */
		tmp = INL(base + 0x30);
		tmp |= 1 << gpio;
		OUTL(tmp, base + 0x30);

		/* As soon as we are talking to ICH8 and above, this register
		   decides whether we can set the gpio or not. */
		if (dev->device_id > 0x2800) {
			tmp = INL(base + 30);
			if (!(tmp & (1 << gpio))) {
				msg_perr("\nERROR: This Intel LPC Bridge"
					" does not allow setting GPIO%02d\n",
					gpio + 32);
				return -1;
			}
		}

		/* Set GPIO to OUTPUT */
		tmp = INL(base + 0x34);
		tmp &= ~(1 << gpio);
		OUTL(tmp, base + 0x34);

		/* Raise GPIO line */
		tmp = INL(base + 0x38);
		if (raise)
			tmp |= 1 << gpio;
		else
			tmp &= ~(1 << gpio);
		OUTL(tmp, base + 0x38);
	} else {
		gpio -= 64;

		/* Set line to GPIO */
		tmp = INL(base + 0x40);
		tmp |= 1 << gpio;
		OUTL(tmp, base + 0x40);

		tmp = INL(base + 40);
		if (!(tmp & (1 << gpio))) {
			msg_perr("\nERROR: This Intel LPC Bridge does "
				"not allow setting GPIO%02d\n", gpio + 64);
			return -1;
		}

		/* Set GPIO to OUTPUT */
		tmp = INL(base + 0x44);
		tmp &= ~(1 << gpio);
		OUTL(tmp, base + 0x44);

		/* Raise GPIO line */
		tmp = INL(base + 0x48);
		if (raise)
			tmp |= 1 << gpio;
		else
			tmp &= ~(1 << gpio);
		OUTL(tmp, base + 0x48);
	}

	return 0;
}

/**
 * Suited for Abit IP35: Intel P35 + ICH9R.
 * Suited for Abit IP35 Pro: Intel P35 + ICH9R.
 */
static int intel_ich_gpio16_raise(void)
{
	return intel_ich_gpio_set(16, 1);
}

/**
 * Suited for HP Puffer2-UL8E (ASUS PTGD-LA OEM): LGA775 + 915 + ICH6.
 */
static int intel_ich_gpio18_raise(void)
{
	return intel_ich_gpio_set(18, 1);
}

/**
 * Suited for ASUS A8JM: Intel 945 + ICH7
 */
static int intel_ich_gpio34_raise(void)
{
	return intel_ich_gpio_set(34, 1);
}

/**
 * Suited for MSI MS-7046: LGA775 + 915P + ICH6.
 */
static int intel_ich_gpio19_raise(void)
{
	return intel_ich_gpio_set(19, 1);
}

/**
 * Suited for:
 * - ASUS P4B266LM (Sony Vaio PCV-RX650): socket478 + 845D + ICH2.
 * - ASUS P4C800-E Deluxe: socket478 + 875P + ICH5.
 * - ASUS P4P800-E Deluxe: Intel socket478 + 865PE + ICH5R.
 * - ASUS P5PE-VM: Intel LGA775 + 865G + ICH5.
 * - Samsung Polaris 32: socket478 + 865P + ICH5.
 */
static int intel_ich_gpio21_raise(void)
{
	return intel_ich_gpio_set(21, 1);
}

/**
 * Suited for:
 *  - ASUS P4B266: socket478 + Intel 845D + ICH2.
 *  - ASUS P4B533-E: socket478 + 845E + ICH4
 *  - ASUS P4B-MX variant in HP Vectra VL420 SFF: socket478 + 845D + ICH2
 */
static int intel_ich_gpio22_raise(void)
{
	return intel_ich_gpio_set(22, 1);
}

/**
 * Suited for HP Vectra VL400: 815 + ICH + PC87360.
 */

static int board_hp_vl400(void)
{
        int ret;
        ret = intel_ich_gpio_set(25, 1);	/* Master write enable ? */
        if (!ret)
                ret = pc87360_gpio_set(0x09, 1);	/* #WP ? */
        if (!ret)
                ret = pc87360_gpio_set(0x27, 1);	/* #TBL */
        return ret;
}

/**
 * Suited for:
 * - Dell PowerEdge 1850: Intel PPGA604 + E7520 + ICH5R.
 * - ASRock P4i65GV: Intel Socket478 + 865GV + ICH5R.
 */
static int intel_ich_gpio23_raise(void)
{
	return intel_ich_gpio_set(23, 1);
}

/**
 * Suited for GIGABYTE GA-8IRML: Intel Socket478 + i845 + ICH2.
 */
static int intel_ich_gpio25_raise(void)
{
	return intel_ich_gpio_set(25, 1);
}

/**
 * Suited for IBase MB899: i945GM + ICH7.
 */
static int intel_ich_gpio26_raise(void)
{
	return intel_ich_gpio_set(26, 1);
}

/**
 * Suited for P4SD-LA (HP OEM): i865 + ICH5
 */
static int intel_ich_gpio32_raise(void)
{
	return intel_ich_gpio_set(32, 1);
}

/**
 * Suited for Acorp 6A815EPD: socket 370 + intel 815 + ICH2.
 */
static int board_acorp_6a815epd(void)
{
	int ret;

	/* Lower Blocks Lock -- pin 7 of PLCC32 */
	ret = intel_ich_gpio_set(22, 1);
	if (!ret) /* Top Block Lock -- pin 8 of PLCC32 */
		ret = intel_ich_gpio_set(23, 1);

	return ret;
}

/**
 * Suited for Kontron 986LCD-M: socket478 + 915GM + ICH7R.
 */
static int board_kontron_986lcd_m(void)
{
	int ret;

	ret = intel_ich_gpio_set(34, 1); /* #TBL */
	if (!ret)
		ret = intel_ich_gpio_set(35, 1); /* #WP */

	return ret;
}

/**
 * Suited for Soyo SY-7VCA: Pro133A + VT82C686.
 */
static int via_apollo_gpo_set(int gpio, int raise)
{
	struct pci_dev *dev;
	uint32_t base;
	uint32_t tmp;

	/* VT82C686 Power management */
	dev = pci_dev_find(0x1106, 0x3057);
	if (!dev) {
		msg_perr("\nERROR: VT82C686 PM device not found.\n");
		return -1;
	}

	msg_pdbg("\nVIA Apollo ACPI: %sing GPIO%02d.\n",
	       raise ? "Rais" : "Dropp", gpio);

	/* select GPO function on multiplexed pins */
	tmp = pci_read_byte(dev, 0x54);
	switch(gpio)
	{
		case 0:
			tmp &= ~0x03;
			break;
		case 1:
			tmp |= 0x04;
			break;
		case 2:
			tmp |= 0x08;
			break;
		case 3:
			tmp |= 0x10;
			break;
	}
	pci_write_byte(dev, 0x54, tmp);

	/* PM IO base */
	base = pci_read_long(dev, 0x48) & 0x0000FF00;

	/* Drop GPO0 */
	tmp = INL(base + 0x4C);
	if (raise)
		tmp |= 1U << gpio;
	else
		tmp &= ~(1U << gpio);
	OUTL(tmp, base + 0x4C);

	return 0;
}

/**
 * Suited for Abit VT6X4: Pro133x + VT82C686A
 */
static int via_apollo_gpo4_lower(void)
{
	return via_apollo_gpo_set(4, 0);
}

/**
 * Suited for Soyo SY-7VCA: Pro133A + VT82C686.
 */
static int via_apollo_gpo0_lower(void)
{
	return via_apollo_gpo_set(0, 0);
}

/**
 * Enable some GPIO pin on SiS southbridge.
 * Suited for MSI 651M-L: SiS651 / SiS962
 */
static int board_msi_651ml(void)
{
    	struct pci_dev *dev;
	uint16_t base, temp;

	dev = pci_dev_find(0x1039, 0x0962);
	if (!dev) {
		msg_perr("Expected south bridge not found\n");
		return 1;
	}

	/* Registers 68 and 64 seem like bitmaps */
	base = pci_read_word(dev, 0x74);
	temp = INW(base + 0x68);
	temp &= ~(1 << 0);		/* Make pin output? */
	OUTW(temp, base + 0x68);

	temp = INW(base + 0x64);
	temp |= (1 << 0);		/* Raise output? */
	OUTW(temp, base + 0x64);

	w836xx_memw_enable(0x2E);

	return 0;
}

/**
 * Find the runtime registers of an SMSC Super I/O, after verifying its
 * chip ID.
 *
 * Returns the base port of the runtime register block, or 0 on error.
 */
static uint16_t smsc_find_runtime(uint16_t sio_port, uint16_t chip_id,
                                  uint8_t logical_device)
{
	uint16_t rt_port = 0;

	/* Verify the chip ID. */
	OUTB(0x55, sio_port);  /* Enable configuration. */
	if (sio_read(sio_port, 0x20) != chip_id) {
		msg_perr("\nERROR: SMSC Super I/O not found.\n");
		goto out;
	}

	/* If the runtime block is active, get its address. */
	sio_write(sio_port, 0x07, logical_device);
	if (sio_read(sio_port, 0x30) & 1) {
		rt_port = (sio_read(sio_port, 0x60) << 8)
		          | sio_read(sio_port, 0x61);
	}

	if (rt_port == 0) {
		msg_perr("\nERROR: "
			"Super I/O runtime interface not available.\n");
	}
out:
	OUTB(0xaa, sio_port);  /* Disable configuration. */
	return rt_port;
}

/**
 * Disable write protection on the Mitac 6513WU.  WP# on the FWH is
 * connected to GP30 on the Super I/O, and TBL# is always high.
 */
static int board_mitac_6513wu(void)
{
	struct pci_dev *dev;
	uint16_t rt_port;
	uint8_t val;

	dev = pci_dev_find(0x8086, 0x2410);	/* Intel 82801AA ISA bridge */
	if (!dev) {
		msg_perr("\nERROR: Intel 82801AA ISA bridge not found.\n");
		return -1;
	}

	rt_port = smsc_find_runtime(0x4e, 0x54 /* LPC47U33x */, 0xa);
	if (rt_port == 0)
		return -1;

	/* Configure the GPIO pin. */
	val = INB(rt_port + 0x33);  /* GP30 config */
	val &= ~0x87;               /* Output, non-inverted, GPIO, push/pull */
	OUTB(val, rt_port + 0x33);

	/* Disable write protection. */
	val = INB(rt_port + 0x4d);  /* GP3 values */
	val |= 0x01;                /* Set GP30 high. */
	OUTB(val, rt_port + 0x4d);

	return 0;
}

/**
 * Suited for ASUS A7V8X: VIA KT400 + VT8235 + IT8703F-A
 */
static int board_asus_a7v8x(void)
{
	uint16_t id, base;
	uint8_t tmp;

	/* find the IT8703F */
	w836xx_ext_enter(0x2E);
	id = (sio_read(0x2E, 0x20) << 8) | sio_read(0x2E, 0x21);
	w836xx_ext_leave(0x2E);

	if (id != 0x8701) {
		msg_perr("\nERROR: IT8703F Super I/O not found.\n");
		return -1;
	}

	/* Get the GP567 IO base */
	w836xx_ext_enter(0x2E);
	sio_write(0x2E, 0x07, 0x0C);
	base = (sio_read(0x2E, 0x60) << 8) | sio_read(0x2E, 0x61);
	w836xx_ext_leave(0x2E);

	if (!base) {
		msg_perr("\nERROR: Failed to read IT8703F Super I/O GPIO"
			" Base.\n");
		return -1;
	}

	/* Raise GP51. */
	tmp = INB(base);
	tmp |= 0x02;
	OUTB(tmp, base);

	return 0;
}

/*
 * General routine for raising/dropping GPIO lines on the ITE IT8712F.
 * There is only some limited checking on the port numbers.
 */
static int it8712f_gpio_set(unsigned int line, int raise)
{
	unsigned int port;
	uint16_t id, base;
	uint8_t tmp;

	port = line / 10;
	port--;
	line %= 10;

	/* Check line */
	if ((port > 4) || /* also catches unsigned -1 */
	    ((port < 4) && (line > 7)) || ((port == 4) && (line > 5))) {
	    msg_perr("\nERROR: Unsupported IT8712F GPIO Line %02d.\n", line);
	    return -1;
	}

	/* find the IT8712F */
	enter_conf_mode_ite(0x2E);
	id = (sio_read(0x2E, 0x20) << 8) | sio_read(0x2E, 0x21);
	exit_conf_mode_ite(0x2E);

	if (id != 0x8712) {
		msg_perr("\nERROR: IT8712F Super I/O not found.\n");
		return -1;
	}

	/* Get the GPIO base */
	enter_conf_mode_ite(0x2E);
	sio_write(0x2E, 0x07, 0x07);
	base = (sio_read(0x2E, 0x62) << 8) | sio_read(0x2E, 0x63);
	exit_conf_mode_ite(0x2E);

	if (!base) {
		msg_perr("\nERROR: Failed to read IT8712F Super I/O GPIO"
			" Base.\n");
		return -1;
	}

	/* set GPIO. */
	tmp = INB(base + port);
	if (raise)
	    tmp |= 1 << line;
	else
	    tmp &= ~(1 << line);
	OUTB(tmp, base + port);

	return 0;
}

/**
 * Suited for:
 * - ASUS A7V600-X: VIA KT600 + VT8237 + IT8712F
 * - ASUS A7V8X-X: VIA KT400 + VT8235 + IT8712F
 */
static int it8712f_gpio3_1_raise(void)
{
	return it8712f_gpio_set(32, 1);
}

#endif

/**
 * Below is the list of boards which need a special "board enable" code in
 * flashrom before their ROM chip can be accessed/written to.
 *
 * NOTE: Please add boards that _don't_ need such enables or don't work yet
 *       to the respective tables in print.c. Thanks!
 *
 * We use 2 sets of IDs here, you're free to choose which is which. This
 * is to provide a very high degree of certainty when matching a board on
 * the basis of subsystem/card IDs. As not every vendor handles
 * subsystem/card IDs in a sane manner.
 *
 * Keep the second set NULLed if it should be ignored. Keep the subsystem IDs
 * NULLed if they don't identify the board fully and if you can't use DMI.
 * But please take care to provide an as complete set of pci ids as possible;
 * autodetection is the preferred behaviour and we would like to make sure that
 * matches are unique.
 *
 * If PCI IDs are not sufficient for board matching, the match can be further
 * constrained by a string that has to be present in the DMI database for
 * the baseboard or the system entry. The pattern is matched by case sensitive
 * substring match, unless it is anchored to the beginning (with a ^ in front)
 * or the end (with a $ at the end). Both anchors may be specified at the
 * same time to match the full field.
 *
 * When a board is matched through DMI, the first and second main PCI IDs
 * and the first subsystem PCI ID have to match as well. If you specify the
 * first subsystem ID as 0x0:0x0, the DMI matching code expects that the
 * subsystem ID of that device is indeed zero.
 *
 * The coreboot ids are used two fold. When running with a coreboot firmware,
 * the ids uniquely matches the coreboot board identification string. When a
 * legacy bios is installed and when autodetection is not possible, these ids
 * can be used to identify the board through the -m command line argument.
 *
 * When a board is identified through its coreboot ids (in both cases), the
 * main pci ids are still required to match, as a safeguard.
 */

/* Please keep this list alphabetically ordered by vendor/board name. */
const struct board_pciid_enable board_pciid_enables[] = {

	/* first pci-id set [4],          second pci-id set [4],          dmi identifier coreboot id [2],             vendor name    board name       max_rom_...  OK? flash enable */
#if defined(__i386__) || defined(__x86_64__)
	{0x10DE, 0x0547, 0x147B, 0x1C2F,  0x10DE, 0x0548, 0x147B, 0x1C2F, NULL,          NULL,         NULL,          "Abit",        "AN-M2",                 0,   NT, nvidia_mcp_gpio2_raise},
	{0x8086, 0x24d3, 0x147b, 0x1014,  0x8086, 0x2578, 0x147b, 0x1014, NULL,          NULL,         NULL,          "Abit",        "IC7",                   0,   NT, intel_ich_gpio23_raise},
	{0x8086, 0x2930, 0x147b, 0x1084,  0x11ab, 0x4364, 0x147b, 0x1084, NULL,          NULL,         NULL,          "Abit",        "IP35",                  0,   OK, intel_ich_gpio16_raise},
	{0x8086, 0x2930, 0x147b, 0x1083,  0x10ec, 0x8167, 0x147b, 0x1083, NULL,          NULL,         NULL,          "Abit",        "IP35 Pro",              0,   OK, intel_ich_gpio16_raise},
	{0x10de, 0x0050, 0x147b, 0x1c1a,       0,      0,      0,      0, NULL,          NULL,         NULL,          "Abit",        "KN8 Ultra",             0,   NT, nvidia_mcp_gpio2_lower},
	{0x10de, 0x01e0, 0x147b, 0x1c00,  0x10de, 0x0060, 0x147B, 0x1c00, NULL,          NULL,         NULL,          "Abit",        "NF7-S",                 0,   OK, nvidia_mcp_gpio8_raise},
	{0x10de, 0x02f0, 0x147b, 0x1c26,  0x10de, 0x0240, 0x10de, 0x0222, NULL,          NULL,         NULL,          "Abit",        "NF-M2 nView",           0,   NT, nvidia_mcp_gpio4_lower},
	{0x1106, 0x0691,      0,      0,  0x1106, 0x3057,      0,      0, NULL,          "abit",       "vt6x4",       "Abit",        "VT6X4",                 0,   OK, via_apollo_gpo4_lower},
	{0x105a, 0x0d30, 0x105a, 0x4d33,  0x8086, 0x1130, 0x8086,      0, NULL,          NULL,         NULL,          "Acorp",       "6A815EPD",              0,   OK, board_acorp_6a815epd},
	{0x1022, 0x746B,      0,      0,       0,      0,      0,      0, NULL,          "AGAMI",      "ARUMA",       "agami",       "Aruma",                 0,   OK, w83627hf_gpio24_raise_2e},
	{0x1106, 0x3177, 0x17F2, 0x3177,  0x1106, 0x3148, 0x17F2, 0x3148, NULL,          NULL,         NULL,          "Albatron",    "PM266A Pro",            0,   OK, w836xx_memw_enable_2e},
	{0x1022, 0x2090,      0,      0,  0x1022, 0x2080,      0,      0, NULL,          "artecgroup", "dbe61",       "Artec Group", "DBE61",                 0,   OK, board_artecgroup_dbe6x},
	{0x1022, 0x2090,      0,      0,  0x1022, 0x2080,      0,      0, NULL,          "artecgroup", "dbe62",       "Artec Group", "DBE62",                 0,   OK, board_artecgroup_dbe6x},
	{0x8086, 0x24D4, 0x1849, 0x24D0,  0x8086, 0x24D5, 0x1849, 0x9739, NULL,          NULL,         NULL,          "ASRock",      "P4i65GV",               0,   OK, intel_ich_gpio23_raise},
	{0x1106, 0x3189, 0x1043, 0x807F,  0x1106, 0x3065, 0x1043, 0x80ED, NULL,          NULL,         NULL,          "ASUS",        "A7V600-X",              0,   OK, it8712f_gpio3_1_raise},
	{0x1106, 0x3177, 0x1043, 0x80A1,  0x1106, 0x3205, 0x1043, 0x8118, NULL,          NULL,         NULL,          "ASUS",        "A7V8X-MX SE",           0,   OK, w836xx_memw_enable_2e},
	{0x1106, 0x3189, 0x1043, 0x807F,  0x1106, 0x3177, 0x1043, 0x808C, NULL,          NULL,         NULL,          "ASUS",        "A7V8X",                 0,   OK, board_asus_a7v8x},
	{0x1106, 0x3189, 0x1043, 0x807F,  0x1106, 0x3177, 0x1043, 0x80A1, NULL,          NULL,         NULL,          "ASUS",        "A7V8X-X",               0,   OK, it8712f_gpio3_1_raise},
	{0x8086, 0x27A0, 0x1043, 0x1287,  0x8086, 0x27DF, 0x1043, 0x1287, "^A8J",        NULL,         NULL,          "ASUS",        "A8JM",                  0,   NT, intel_ich_gpio34_raise},
	{0x10DE, 0x0260, 0x103c, 0x2a3e,  0x10DE, 0x0264, 0x103c, 0x2a3e, "NAGAMI",      NULL,         NULL,          "ASUS",        "A8N-LA",                0,   NT, nvidia_mcp_gpio0_raise},
	{0x10DE, 0x005E, 0x1043, 0x815A,  0x10DE, 0x0054, 0x1043, 0x815A, NULL,          NULL,         NULL,          "ASUS",        "A8N",                   0,   NT, board_shuttle_fn25},
	{0x10de, 0x0264, 0x1043, 0x81bc,  0x10de, 0x02f0, 0x1043, 0x81cd, NULL,          NULL,         NULL,          "ASUS",        "A8N-VM CSM",            0,   NT, w83627ehf_gpio24_raise_2e},
	{0x10DE, 0x0264, 0x1043, 0x81C0,  0x10DE, 0x0260, 0x1043, 0x81C0, NULL,          NULL,         NULL,          "ASUS",        "M2NBP-VM CSM",          0,   OK, nvidia_mcp_gpio0_raise},
	{0x1106, 0x1336, 0x1043, 0x80ed,  0x1106, 0x3288, 0x1043, 0x8249, NULL,          NULL,         NULL,          "ASUS",        "M2V-MX",                0,   OK, via_vt823x_gpio5_raise},
	{0x8086, 0x1A30, 0x1043, 0x8025,  0x8086, 0x244B, 0x104D, 0x80F0, NULL,          NULL,         NULL,          "ASUS",        "P4B266-LM",             0,   OK, intel_ich_gpio21_raise},
	{0x8086, 0x1a30, 0x1043, 0x8070,  0x8086, 0x244b, 0x1043, 0x8028, NULL,          NULL,         NULL,          "ASUS",        "P4B266",                0,   OK, intel_ich_gpio22_raise},
	{0x8086, 0x1A30, 0x1043, 0x8088,  0x8086, 0x24C3, 0x1043, 0x8089, NULL,          NULL,         NULL,          "ASUS",        "P4B533-E",              0,   NT, intel_ich_gpio22_raise},
	{0x8086, 0x24D3, 0x1043, 0x80A6,  0x8086, 0x2578, 0x1043, 0x80F6, NULL,          NULL,         NULL,          "ASUS",        "P4C800-E Deluxe",       0,   OK, intel_ich_gpio21_raise},
	{0x8086, 0x2570, 0x1043, 0x80F2,  0x105A, 0x3373, 0x1043, 0x80F5, NULL,          NULL,         NULL,          "ASUS",        "P4P800-E Deluxe",       0,   OK, intel_ich_gpio21_raise},
	{0x8086, 0x2570, 0x1043, 0x80A5,  0x105A, 0x24D3, 0x1043, 0x80A6, NULL,          NULL,         NULL,          "ASUS",        "P4SD-LA",               0,   NT, intel_ich_gpio32_raise},
	{0x1039, 0x0661, 0x1043, 0x8113,  0x1039, 0x5513, 0x1043, 0x8087, NULL,          NULL,         NULL,          "ASUS",        "P4S800-MX",             512, OK, w836xx_memw_enable_2e},
	{0x10B9, 0x1541,      0,      0,  0x10B9, 0x1533,      0,      0, "^P5A$",       "asus",       "p5a",         "ASUS",        "P5A",                   0,   OK, board_asus_p5a},
	{0x10DE, 0x0030, 0x1043, 0x818a,  0x8086, 0x100E, 0x1043, 0x80EE, NULL,          NULL,         NULL,          "ASUS",        "P5ND2-SLI Deluxe",      0,   OK, nvidia_mcp_gpio10_raise},
	{0x8086, 0x24dd, 0x1043, 0x80a6,  0x8086, 0x2570, 0x1043, 0x8157, NULL,          NULL,         NULL,          "ASUS",        "P5PE-VM",               0,   OK, intel_ich_gpio21_raise},
	{0x8086, 0x3590, 0x1028, 0x016c,  0x1000, 0x0030, 0x1028, 0x016c, NULL,          NULL,         NULL,          "Dell",        "PowerEdge 1850",        0,   OK, intel_ich_gpio23_raise},
	{0x1106, 0x3038, 0x1019, 0x0996,  0x1106, 0x3177, 0x1019, 0x0996, NULL,          NULL,         NULL,          "Elitegroup",  "K7VTA3",                256, OK, NULL},
	{0x1106, 0x3177, 0x1106, 0x3177,  0x1106, 0x3059, 0x1695, 0x3005, NULL,          NULL,         NULL,          "EPoX",        "EP-8K5A2",              0,   OK, w836xx_memw_enable_2e},
	{0x10EC, 0x8139, 0x1695, 0x9001,  0x11C1, 0x5811, 0x1695, 0x9015, NULL,          NULL,         NULL,          "EPoX",        "EP-8RDA3+",             0,   OK, nvidia_mcp_gpio31_raise},
	{0x8086, 0x7110,      0,      0,  0x8086, 0x7190,      0,      0, NULL,          "epox",       "ep-bx3",      "EPoX",        "EP-BX3",                0,   OK, board_epox_ep_bx3},
	{0x1106, 0x0686, 0x1106, 0x0686,  0x1106, 0x3058, 0x1458, 0xa000, NULL,          NULL,         NULL,          "GIGABYTE",    "GA-7ZM",                512, OK, NULL},
	{0x8086, 0x244b, 0x8086, 0x2442,  0x8086, 0x2445, 0x1458, 0xa002, NULL,          NULL,         NULL,          "GIGABYTE",    "GA-8IRML",              0,   OK, intel_ich_gpio25_raise},
	{0x10DE, 0x0050, 0x1458, 0x0C11,  0x10DE, 0x005e, 0x1458, 0x5000, NULL,          NULL,         NULL,          "GIGABYTE",    "GA-K8N-SLI",            0,   OK, nvidia_mcp_gpio21_raise},
	{0x1166, 0x0223, 0x103c, 0x320d,  0x14e4, 0x1678, 0x103c, 0x703e, NULL,          "hp",         "dl145_g3",    "HP",          "DL145 G3",              0,   OK, board_hp_dl145_g3_enable},
	{0x1166, 0x0223, 0x103c, 0x320d,  0x14e4, 0x1648, 0x103c, 0x310f, NULL,          "hp",         "dl165_g6",    "HP",          "DL165 G6",              0,   OK, board_hp_dl165_g6_enable},
	{0x8086, 0x2580, 0x103c, 0x2a08,  0x8086, 0x2640, 0x103c, 0x2a0a, NULL,          NULL,         NULL,          "HP",          "Puffer2-UL8E",          0,   OK, intel_ich_gpio18_raise},
	{0x8086, 0x2415, 0x103c, 0x1249,  0x10b7, 0x9200, 0x103c, 0x1246, NULL,          NULL,         NULL,          "HP",          "Vectra VL400",          0,   OK, board_hp_vl400}, 
	{0x8086, 0x1a30, 0x103c, 0x1a30,  0x8086, 0x2443, 0x103c, 0x2440, "^VL420$",     NULL,         NULL,          "HP",          "VL420 SFF",             0,   OK, intel_ich_gpio22_raise},
	{0x10de, 0x0369, 0x103c, 0x12fe,  0x10de, 0x0364, 0x103c, 0x12fe, NULL,          NULL,         NULL,          "HP",          "xw9400",                0,   OK, nvidia_mcp_gpio5_raise},
	{0x8086, 0x27A0,      0,      0,  0x8086, 0x27B9,      0,      0, NULL,          "ibase",      "mb899",       "iBASE",       "MB899",                 0,   NT, intel_ich_gpio26_raise},
	{0x1166, 0x0205, 0x1014, 0x0347,  0x1002, 0x515E, 0x1014, 0x0325, NULL,          NULL,         NULL,          "IBM",         "x3455",                 0,   OK, board_ibm_x3455},
	{0x1039, 0x5513, 0x8086, 0xd61f,  0x1039, 0x6330, 0x8086, 0xd61f, NULL,          NULL,         NULL,          "Intel",       "D201GLY",               0,   OK, wbsio_check_for_spi},
	{0x8086, 0x7190,      0,      0,  0x8086, 0x7110,      0,      0, "^SE440BX-2$", NULL,         NULL,          "Intel",       "SE440BX-2",             0,   NT, intel_piix4_gpo27_lower},
	{0x1022, 0x7468,      0,      0,       0,      0,      0,      0, NULL,          "iwill",      "dk8_htx",     "IWILL",       "DK8-HTX",               0,   OK, w83627hf_gpio24_raise_2e},
	{0x8086, 0x27A0, 0x8086, 0x27a0,  0x8086, 0x27b8, 0x8086, 0x27b8, NULL,          "kontron",    "986lcd-m",    "Kontron",     "986LCD-M",              0,   OK, board_kontron_986lcd_m},
	{0x8086, 0x2411, 0x8086, 0x2411,  0x8086, 0x7125, 0x0e11, 0xb165, NULL,          NULL,         NULL,          "Mitac",       "6513WU",                0,   OK, board_mitac_6513wu},
	{0x10DE, 0x005E, 0x1462, 0x7125,  0x10DE, 0x0052, 0x1462, 0x7125, NULL,          NULL,         NULL,          "MSI",         "K8N Neo4-F",            0,   OK, nvidia_mcp_gpio2_raise},
	{0x13f6, 0x0111, 0x1462, 0x5900,  0x1106, 0x3177, 0x1106,      0, NULL,          NULL,         NULL,          "MSI",         "MS-6590 (KT4 Ultra)",   0,   OK, board_msi_kt4v},
	{0x1106, 0x3149, 0x1462, 0x7094,  0x10ec, 0x8167, 0x1462, 0x094c, NULL,          NULL,         NULL,          "MSI",         "MS-6702E (K8T Neo2-F)", 0,   OK, w83627thf_gpio44_raise_2e},
	{0x1106, 0x0571, 0x1462, 0x7120,  0x1106, 0x3065, 0x1462, 0x7120, NULL,          NULL,         NULL,          "MSI",         "MS-6712 (KT4V)",        0,   OK, board_msi_kt4v},
	{0x1039, 0x7012, 0x1462, 0x0050,  0x1039, 0x6325, 0x1462, 0x0058, NULL,          NULL,         NULL,          "MSI",         "MS-7005 (651M-L)",      0,   OK, board_msi_651ml},
	{0x10DE, 0x00E0, 0x1462, 0x0250,  0x10DE, 0x00E1, 0x1462, 0x0250, NULL,          NULL,         NULL,          "MSI",         "MS-7025 (K8N Neo2 Platinum)", 0,   OK, nvidia_mcp_gpio0c_raise},
	{0x8086, 0x2658, 0x1462, 0x7046,  0x1106, 0x3044, 0x1462, 0x046d, NULL,          NULL,         NULL,          "MSI",         "MS-7046",               0,   OK, intel_ich_gpio19_raise},
	{0x10DE, 0x005E, 0x1462, 0x7135,  0x10DE, 0x0050, 0x1462, 0x7135, NULL,          "msi",        "k8n-neo3",    "MSI",         "MS-7135 (K8N Neo3)",    0,   OK, w83627thf_gpio44_raise_4e},
	{0x10DE, 0x0270, 0x1462, 0x7207,  0x10DE, 0x0264, 0x1462, 0x7207, NULL,          NULL,         NULL,          "MSI",         "MS-7207 (K8N GM2-L)",   0,   NT, nvidia_mcp_gpio2_raise},
	{0x1011, 0x0019, 0xaa55, 0xaa55,  0x8086, 0x7190,      0,      0, NULL,          NULL,         NULL,          "Nokia",       "IP530",                 0,   OK, fdc37b787_gpio50_raise_3f0},
	{0x8086, 0x24d3, 0x144d, 0xb025,  0x8086, 0x1050, 0x144d, 0xb025, NULL,          NULL,         NULL,          "Samsung",     "Polaris 32",            0,   OK, intel_ich_gpio21_raise},
	{0x1106, 0x3099,      0,      0,  0x1106, 0x3074,      0,      0, NULL,          "shuttle",    "ak31",        "Shuttle",     "AK31",                  0,   OK, w836xx_memw_enable_2e},
	{0x1106, 0x3104, 0x1297, 0xa238,  0x1106, 0x3059, 0x1297, 0xc063, NULL,          NULL,         NULL,          "Shuttle",     "AK38N",                 256, OK, NULL},
	{0x10DE, 0x0050, 0x1297, 0x5036,  0x1412, 0x1724, 0x1297, 0x5036, NULL,          NULL,         NULL,          "Shuttle",     "FN25",                  0,   OK, board_shuttle_fn25},
	{0x1106, 0x3038, 0x0925, 0x1234,  0x1106, 0x3058, 0x15DD, 0x7609, NULL,          NULL,         NULL,          "Soyo",        "SY-7VCA",               0,   OK, via_apollo_gpo0_lower},
	{0x1106, 0x3038, 0x0925, 0x1234,  0x1106, 0x0596, 0x1106,      0, NULL,          NULL,         NULL,          "Tekram",      "P6Pro-A5",              256, OK, NULL},
	{0x1106, 0x3123, 0x1106, 0x3123,  0x1106, 0x3059, 0x1106, 0x4161, NULL,          NULL,         NULL,          "Termtek",     "TK-3370 (Rev:2.5B)",    0,   OK, w836xx_memw_enable_4e},
	{0x8086, 0x1076, 0x8086, 0x1176,  0x1106, 0x3059, 0x10f1, 0x2498, NULL,          NULL,         NULL,          "Tyan",        "S2498 (Tomcat K7M)",    0,   OK, w836xx_memw_enable_2e},
	{0x1106, 0x0259, 0x1106, 0xAA07,  0x1106, 0x3227, 0x1106, 0xAA07, NULL,          NULL,         NULL,          "VIA",         "EPIA EK",               0,   NT, via_vt823x_gpio9_raise},
	{0x1106, 0x3177, 0x1106, 0xAA01,  0x1106, 0x3123, 0x1106, 0xAA01, NULL,          NULL,         NULL,          "VIA",         "EPIA M/MII/...",        0,   OK, via_vt823x_gpio15_raise},
	{0x1106, 0x0259, 0x1106, 0x3227,  0x1106, 0x3065, 0x1106, 0x3149, NULL,          NULL,         NULL,          "VIA",         "EPIA-N/NL",             0,   OK, via_vt823x_gpio9_raise},
#endif
	{     0,      0,      0,      0,       0,      0,      0,      0, NULL,          NULL,         NULL,          NULL,          NULL,                    0,   NT, NULL}, /* end marker */
};

/**
 * Match boards on coreboot table gathered vendor and part name.
 * Require main PCI IDs to match too as extra safety.
 */
static const struct board_pciid_enable *board_match_coreboot_name(const char *vendor,
							    const char *part)
{
	const struct board_pciid_enable *board = board_pciid_enables;
	const struct board_pciid_enable *partmatch = NULL;

	for (; board->vendor_name; board++) {
		if (vendor && (!board->lb_vendor
			       || strcasecmp(board->lb_vendor, vendor)))
			continue;

		if (!board->lb_part || strcasecmp(board->lb_part, part))
			continue;

		if (!pci_dev_find(board->first_vendor, board->first_device))
			continue;

		if (board->second_vendor &&
		    !pci_dev_find(board->second_vendor, board->second_device))
			continue;

		if (vendor)
			return board;

		if (partmatch) {
			/* a second entry has a matching part name */
			msg_pinfo("AMBIGUOUS BOARD NAME: %s\n", part);
			msg_pinfo("At least vendors '%s' and '%s' match.\n",
			       partmatch->lb_vendor, board->lb_vendor);
			msg_perr("Please use the full -m vendor:part syntax.\n");
			return NULL;
		}
		partmatch = board;
	}

	if (partmatch)
		return partmatch;

	if (!partvendor_from_cbtable) {
		/* Only warn if the mainboard type was not gathered from the
		 * coreboot table. If it was, the coreboot implementor is
		 * expected to fix flashrom, too.
		 */
		msg_perr("\nUnknown vendor:board from -m option: %s:%s\n\n",
		       vendor, part);
	}
	return NULL;
}

/**
 * Match boards on PCI IDs and subsystem IDs.
 * Second set of IDs can be main only or missing completely.
 */
const static struct board_pciid_enable *board_match_pci_card_ids(void)
{
	const struct board_pciid_enable *board = board_pciid_enables;

	for (; board->vendor_name; board++) {
		if ((!board->first_card_vendor || !board->first_card_device) &&
		      !board->dmi_pattern)
			continue;

		if (!pci_card_find(board->first_vendor, board->first_device,
				   board->first_card_vendor,
				   board->first_card_device))
			continue;

		if (board->second_vendor) {
			if (board->second_card_vendor) {
				if (!pci_card_find(board->second_vendor,
						   board->second_device,
						   board->second_card_vendor,
						   board->second_card_device))
					continue;
			} else {
				if (!pci_dev_find(board->second_vendor,
						  board->second_device))
					continue;
			}
		}

		if (board->dmi_pattern) {
			if (!has_dmi_support) {
				msg_perr("WARNING: Can't autodetect %s %s,"
				       " DMI info unavailable.\n",
				       board->vendor_name, board->board_name);
				continue;
			} else {
				if (!dmi_match(board->dmi_pattern))
					continue;
			}
		}

		return board;
	}

	return NULL;
}

int board_flash_enable(const char *vendor, const char *part)
{
	const struct board_pciid_enable *board = NULL;
	int ret = 0;

	if (part)
		board = board_match_coreboot_name(vendor, part);

	if (!board)
		board = board_match_pci_card_ids();

        if (board && board->status == NT) {
                if (!force_boardenable) {
                        msg_pinfo("WARNING: Your mainboard is %s %s, but the mainboard-specific\n"
                               "code has not been tested, and thus will not not be executed by default.\n"
                               "Depending on your hardware environment, erasing, writing or even probing\n"
                               "can fail without running the board specific code.\n\n"
                               "Please see the man page (section PROGRAMMER SPECIFIC INFO, subsection\n"
                               "\"internal programmer\") for details.\n",
                               board->vendor_name, board->board_name);
                        board = NULL;
                } else {
                        msg_pinfo("NOTE: Running an untested board enable procedure.\n"
                               "Please report success/failure to flashrom@flashrom.org.\n");
		}
        }

	if (board) {
		if (board->max_rom_decode_parallel)
			max_rom_decode.parallel =
				board->max_rom_decode_parallel * 1024;

		if (board->enable != NULL) {
			msg_pinfo("Disabling flash write protection for "
			       "board \"%s %s\"... ", board->vendor_name,
			       board->board_name);

			ret = board->enable();
			if (ret)
				msg_pinfo("FAILED!\n");
			else
				msg_pinfo("OK.\n");
		}
	}

	return ret;
}