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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/mach-ixp4xx/gtwx5715-pci.c
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/*

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 * arch/arm/mach-ixp4xx/gtwx5715-pci.c

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 *

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 * Gemtek GTWX5715 (Linksys WRV54G) board setup

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 *

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 * Copyright (C) 2004 George T. Joseph

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 * Derived from Coyote

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 *

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 * This program is free software; you can redistribute it and/or

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 * modify it under the terms of the GNU General Public License

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 * as published by the Free Software Foundation; either version 2

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 * of the License, or (at your option) any later version.

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 *

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 * This program is distributed in the hope that it will be useful,

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 * GNU General Public License for more details.

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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program; if not, write to the Free Software

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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

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 *

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 */

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#include <linux/pci.h>

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#include <linux/init.h>

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#include <linux/delay.h>

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#include <linux/irq.h>

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#include <asm/mach-types.h>

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#include <mach/hardware.h>

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#include <asm/mach/pci.h>

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#define SLOT0_DEVID	0

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#define SLOT1_DEVID	1

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#define INTA		10 /* slot 1 has INTA and INTB crossed */

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#define INTB		11

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/*

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 * Slot 0 isn't actually populated with a card connector but

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 * we initialize it anyway in case a future version has the

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 * slot populated or someone with good soldering skills has

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 * some free time.

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 */

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void __init gtwx5715_pci_preinit(void)

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{

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	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);

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	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);

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	ixp4xx_pci_preinit();

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}

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static int __init gtwx5715_map_irq(struct pci_dev *dev, u8 slot, u8 pin)

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{

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	int rc = -1;

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	if ((slot == SLOT0_DEVID && pin == 1) ||

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	    (slot == SLOT1_DEVID && pin == 2))

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		rc = IXP4XX_GPIO_IRQ(INTA);

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	else if ((slot == SLOT0_DEVID && pin == 2) ||

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		 (slot == SLOT1_DEVID && pin == 1))

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		rc = IXP4XX_GPIO_IRQ(INTB);

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	printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n",

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	       __func__, slot, pin, rc);

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	return rc;

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}

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struct hw_pci gtwx5715_pci __initdata = {

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	.nr_controllers = 1,

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	.preinit =        gtwx5715_pci_preinit,

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	.swizzle =        pci_std_swizzle,

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	.setup =          ixp4xx_setup,

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	.scan =           ixp4xx_scan_bus,

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	.map_irq =        gtwx5715_map_irq,

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};

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int __init gtwx5715_pci_init(void)

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{

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	if (machine_is_gtwx5715())

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		pci_common_init(&gtwx5715_pci);

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	return 0;

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}

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subsys_initcall(gtwx5715_pci_init);

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