[mirror_ubuntu-artful-kernel.git] / arch / arm / mach-footbridge / cats-pci.c

/*
 * linux/arch/arm/mach-footbridge/cats-pci.c
 *
 * PCI bios-type initialisation for PCI machines
 *
 * Bits taken from various places.
 */
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>

#include <asm/irq.h>
#include <asm/mach/pci.h>
#include <asm/mach-types.h>

/* cats host-specific stuff */
static int irqmap_cats[] __initdata = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 };

static u8 cats_no_swizzle(struct pci_dev *dev, u8 *pin)
{
	return 0;
}

static int __init cats_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
	if (dev->irq >= 255)
		return -1;	/* not a valid interrupt. */

	if (dev->irq >= 128)
		return dev->irq & 0x1f;

	if (dev->irq >= 1 && dev->irq <= 4)
		return irqmap_cats[dev->irq - 1];

	if (dev->irq != 0)
		printk("PCI: device %02x:%02x has unknown irq line %x\n",
		       dev->bus->number, dev->devfn, dev->irq);

	return -1;
}

/*
 * why not the standard PCI swizzle?  does this prevent 4-port tulip
 * cards being used (ie, pci-pci bridge based cards)?
 */
static struct hw_pci cats_pci __initdata = {
	.swizzle		= cats_no_swizzle,
	.map_irq		= cats_map_irq,
	.nr_controllers		= 1,
	.ops			= &dc21285_ops,
	.setup			= dc21285_setup,
	.preinit		= dc21285_preinit,
	.postinit		= dc21285_postinit,
};

static int __init cats_pci_init(void)
{
	if (machine_is_cats())
		pci_common_init(&cats_pci);
	return 0;
}

subsys_initcall(cats_pci_init);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/arm/mach-footbridge/cats-pci.c
	3	*
	4	* PCI bios-type initialisation for PCI machines
	5	*
	6	* Bits taken from various places.
	7	*/
	8	#include <linux/kernel.h>
	9	#include <linux/pci.h>
	10	#include <linux/init.h>
	11
	12	#include <asm/irq.h>
	13	#include <asm/mach/pci.h>
	14	#include <asm/mach-types.h>
	15
	16	/* cats host-specific stuff */
	17	static int irqmap_cats[] __initdata = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 };
	18
66e9279a RK	19	static u8 cats_no_swizzle(struct pci_dev dev, u8 pin)
	20	{
	21	return 0;
	22	}
	23
d5341942	24	static int __init cats_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
1da177e4	25	{
e38d523f BD	26	if (dev->irq >= 255)
	27	return -1; /* not a valid interrupt. */
	28
1da177e4 LT	29	if (dev->irq >= 128)
	30	return dev->irq & 0x1f;
	31
	32	if (dev->irq >= 1 && dev->irq <= 4)
	33	return irqmap_cats[dev->irq - 1];
	34
	35	if (dev->irq != 0)
	36	printk("PCI: device %02x:%02x has unknown irq line %x\n",
	37	dev->bus->number, dev->devfn, dev->irq);
	38
	39	return -1;
	40	}
	41
	42	/*
	43	* why not the standard PCI swizzle? does this prevent 4-port tulip
	44	* cards being used (ie, pci-pci bridge based cards)?
	45	*/
	46	static struct hw_pci cats_pci __initdata = {
66e9279a	47	.swizzle = cats_no_swizzle,
1da177e4 LT	48	.map_irq = cats_map_irq,
1da177e4 LT	49	.nr_controllers = 1,
c23bfc38	50	.ops = &dc21285_ops,
1da177e4	51	.setup = dc21285_setup,
1da177e4 LT	52	.preinit = dc21285_preinit,
	53	.postinit = dc21285_postinit,
	54	};
	55
cdea4606	56	static int __init cats_pci_init(void)
1da177e4 LT	57	{
	58	if (machine_is_cats())
	59	pci_common_init(&cats_pci);
	60	return 0;
	61	}
	62
	63	subsys_initcall(cats_pci_init);