18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-only
28c2ecf20Sopenharmony_ci/*
38c2ecf20Sopenharmony_ci * arch/arm/mach-ixp4xx/nas100d-pci.c
48c2ecf20Sopenharmony_ci *
58c2ecf20Sopenharmony_ci * NAS 100d board-level PCI initialization
68c2ecf20Sopenharmony_ci *
78c2ecf20Sopenharmony_ci * based on ixdp425-pci.c:
88c2ecf20Sopenharmony_ci *	Copyright (C) 2002 Intel Corporation.
98c2ecf20Sopenharmony_ci *	Copyright (C) 2003-2004 MontaVista Software, Inc.
108c2ecf20Sopenharmony_ci *
118c2ecf20Sopenharmony_ci * Maintainer: http://www.nslu2-linux.org/
128c2ecf20Sopenharmony_ci */
138c2ecf20Sopenharmony_ci
148c2ecf20Sopenharmony_ci#include <linux/pci.h>
158c2ecf20Sopenharmony_ci#include <linux/init.h>
168c2ecf20Sopenharmony_ci#include <linux/irq.h>
178c2ecf20Sopenharmony_ci#include <asm/mach/pci.h>
188c2ecf20Sopenharmony_ci#include <asm/mach-types.h>
198c2ecf20Sopenharmony_ci
208c2ecf20Sopenharmony_ci#include "irqs.h"
218c2ecf20Sopenharmony_ci
228c2ecf20Sopenharmony_ci#define MAX_DEV		3
238c2ecf20Sopenharmony_ci#define IRQ_LINES	3
248c2ecf20Sopenharmony_ci
258c2ecf20Sopenharmony_ci/* PCI controller GPIO to IRQ pin mappings */
268c2ecf20Sopenharmony_ci#define INTA		11
278c2ecf20Sopenharmony_ci#define INTB		10
288c2ecf20Sopenharmony_ci#define INTC		9
298c2ecf20Sopenharmony_ci#define INTD		8
308c2ecf20Sopenharmony_ci#define INTE		7
318c2ecf20Sopenharmony_ci
328c2ecf20Sopenharmony_civoid __init nas100d_pci_preinit(void)
338c2ecf20Sopenharmony_ci{
348c2ecf20Sopenharmony_ci	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW);
358c2ecf20Sopenharmony_ci	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW);
368c2ecf20Sopenharmony_ci	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW);
378c2ecf20Sopenharmony_ci	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW);
388c2ecf20Sopenharmony_ci	irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW);
398c2ecf20Sopenharmony_ci	ixp4xx_pci_preinit();
408c2ecf20Sopenharmony_ci}
418c2ecf20Sopenharmony_ci
428c2ecf20Sopenharmony_cistatic int __init nas100d_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
438c2ecf20Sopenharmony_ci{
448c2ecf20Sopenharmony_ci	static int pci_irq_table[MAX_DEV][IRQ_LINES] = {
458c2ecf20Sopenharmony_ci		{ IXP4XX_GPIO_IRQ(INTA), -1, -1 },
468c2ecf20Sopenharmony_ci		{ IXP4XX_GPIO_IRQ(INTB), -1, -1 },
478c2ecf20Sopenharmony_ci		{ IXP4XX_GPIO_IRQ(INTC), IXP4XX_GPIO_IRQ(INTD),
488c2ecf20Sopenharmony_ci		  IXP4XX_GPIO_IRQ(INTE) },
498c2ecf20Sopenharmony_ci	};
508c2ecf20Sopenharmony_ci
518c2ecf20Sopenharmony_ci	if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES)
528c2ecf20Sopenharmony_ci		return pci_irq_table[slot - 1][pin - 1];
538c2ecf20Sopenharmony_ci
548c2ecf20Sopenharmony_ci	return -1;
558c2ecf20Sopenharmony_ci}
568c2ecf20Sopenharmony_ci
578c2ecf20Sopenharmony_cistruct hw_pci __initdata nas100d_pci = {
588c2ecf20Sopenharmony_ci	.nr_controllers = 1,
598c2ecf20Sopenharmony_ci	.ops		= &ixp4xx_ops,
608c2ecf20Sopenharmony_ci	.preinit	= nas100d_pci_preinit,
618c2ecf20Sopenharmony_ci	.setup		= ixp4xx_setup,
628c2ecf20Sopenharmony_ci	.map_irq	= nas100d_map_irq,
638c2ecf20Sopenharmony_ci};
648c2ecf20Sopenharmony_ci
658c2ecf20Sopenharmony_ciint __init nas100d_pci_init(void)
668c2ecf20Sopenharmony_ci{
678c2ecf20Sopenharmony_ci	if (machine_is_nas100d())
688c2ecf20Sopenharmony_ci		pci_common_init(&nas100d_pci);
698c2ecf20Sopenharmony_ci
708c2ecf20Sopenharmony_ci	return 0;
718c2ecf20Sopenharmony_ci}
728c2ecf20Sopenharmony_ci
738c2ecf20Sopenharmony_cisubsys_initcall(nas100d_pci_init);
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