[mirror_ubuntu-hirsute-kernel.git] / arch / arm / mach-footbridge / personal-pci.c

// SPDX-License-Identifier: GPL-2.0
/*
 * linux/arch/arm/mach-footbridge/personal-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>

static int irqmap_personal_server[] = {
	IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0,
	IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI
};

static int personal_server_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
	unsigned char line;

	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);

	if (line > 0x40 && line <= 0x5f) {
		/* line corresponds to the bit controlling this interrupt
		 * in the footbridge.  Ignore the first 8 interrupt bits,
		 * look up the rest in the map.  IN0 is bit number 8
		 */
		return irqmap_personal_server[(line & 0x1f) - 8];
	} else if (line == 0) {
		/* no interrupt */
		return 0;
	} else
		return irqmap_personal_server[(line - 1) & 3];
}

static struct hw_pci personal_server_pci __initdata = {
	.map_irq		= personal_server_map_irq,
	.nr_controllers		= 1,
	.ops			= &dc21285_ops,
	.setup			= dc21285_setup,
	.preinit		= dc21285_preinit,
	.postinit		= dc21285_postinit,
};

static int __init personal_pci_init(void)
{
	if (machine_is_personal_server())
		pci_common_init(&personal_server_pci);
	return 0;
}

subsys_initcall(personal_pci_init);
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* linux/arch/arm/mach-footbridge/personal-pci.c
	4	*
	5	* PCI bios-type initialisation for PCI machines
	6	*
	7	* Bits taken from various places.
	8	*/
	9	#include <linux/kernel.h>
	10	#include <linux/pci.h>
	11	#include <linux/init.h>
	12
	13	#include <asm/irq.h>
	14	#include <asm/mach/pci.h>
	15	#include <asm/mach-types.h>
	16
050bfe2b	17	static int irqmap_personal_server[] = {
1da177e4 LT	18	IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0,
	19	IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI
	20	};
	21
050bfe2b	22	static int personal_server_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
1da177e4 LT	23	{
	24	unsigned char line;
	25
	26	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
	27
	28	if (line > 0x40 && line <= 0x5f) {
	29	/* line corresponds to the bit controlling this interrupt
	30	* in the footbridge. Ignore the first 8 interrupt bits,
	31	* look up the rest in the map. IN0 is bit number 8
	32	*/
	33	return irqmap_personal_server[(line & 0x1f) - 8];
	34	} else if (line == 0) {
	35	/* no interrupt */
	36	return 0;
	37	} else
	38	return irqmap_personal_server[(line - 1) & 3];
	39	}
	40
	41	static struct hw_pci personal_server_pci __initdata = {
	42	.map_irq = personal_server_map_irq,
	43	.nr_controllers = 1,
c23bfc38	44	.ops = &dc21285_ops,
1da177e4	45	.setup = dc21285_setup,
1da177e4 LT	46	.preinit = dc21285_preinit,
	47	.postinit = dc21285_postinit,
	48	};
	49
	50	static int __init personal_pci_init(void)
	51	{
	52	if (machine_is_personal_server())
	53	pci_common_init(&personal_server_pci);
	54	return 0;
	55	}
	56
	57	subsys_initcall(personal_pci_init);