18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-only 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * arch/arm/mach-ixp4xx/ixdp425-pci.c 48c2ecf20Sopenharmony_ci * 58c2ecf20Sopenharmony_ci * IXDP425 board-level PCI initialization 68c2ecf20Sopenharmony_ci * 78c2ecf20Sopenharmony_ci * Copyright (C) 2002 Intel Corporation. 88c2ecf20Sopenharmony_ci * Copyright (C) 2003-2004 MontaVista Software, Inc. 98c2ecf20Sopenharmony_ci * 108c2ecf20Sopenharmony_ci * Maintainer: Deepak Saxena <dsaxena@plexity.net> 118c2ecf20Sopenharmony_ci */ 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_ci#include <linux/kernel.h> 148c2ecf20Sopenharmony_ci#include <linux/pci.h> 158c2ecf20Sopenharmony_ci#include <linux/init.h> 168c2ecf20Sopenharmony_ci#include <linux/irq.h> 178c2ecf20Sopenharmony_ci#include <linux/delay.h> 188c2ecf20Sopenharmony_ci#include <asm/mach/pci.h> 198c2ecf20Sopenharmony_ci#include <asm/irq.h> 208c2ecf20Sopenharmony_ci#include <mach/hardware.h> 218c2ecf20Sopenharmony_ci#include <asm/mach-types.h> 228c2ecf20Sopenharmony_ci 238c2ecf20Sopenharmony_ci#include "irqs.h" 248c2ecf20Sopenharmony_ci 258c2ecf20Sopenharmony_ci#define MAX_DEV 4 268c2ecf20Sopenharmony_ci#define IRQ_LINES 4 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ci/* PCI controller GPIO to IRQ pin mappings */ 298c2ecf20Sopenharmony_ci#define INTA 11 308c2ecf20Sopenharmony_ci#define INTB 10 318c2ecf20Sopenharmony_ci#define INTC 9 328c2ecf20Sopenharmony_ci#define INTD 8 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ci 358c2ecf20Sopenharmony_civoid __init ixdp425_pci_preinit(void) 368c2ecf20Sopenharmony_ci{ 378c2ecf20Sopenharmony_ci irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); 388c2ecf20Sopenharmony_ci irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); 398c2ecf20Sopenharmony_ci irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); 408c2ecf20Sopenharmony_ci irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW); 418c2ecf20Sopenharmony_ci ixp4xx_pci_preinit(); 428c2ecf20Sopenharmony_ci} 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_cistatic int __init ixdp425_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) 458c2ecf20Sopenharmony_ci{ 468c2ecf20Sopenharmony_ci static int pci_irq_table[IRQ_LINES] = { 478c2ecf20Sopenharmony_ci IXP4XX_GPIO_IRQ(INTA), 488c2ecf20Sopenharmony_ci IXP4XX_GPIO_IRQ(INTB), 498c2ecf20Sopenharmony_ci IXP4XX_GPIO_IRQ(INTC), 508c2ecf20Sopenharmony_ci IXP4XX_GPIO_IRQ(INTD) 518c2ecf20Sopenharmony_ci }; 528c2ecf20Sopenharmony_ci 538c2ecf20Sopenharmony_ci if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) 548c2ecf20Sopenharmony_ci return pci_irq_table[(slot + pin - 2) % 4]; 558c2ecf20Sopenharmony_ci 568c2ecf20Sopenharmony_ci return -1; 578c2ecf20Sopenharmony_ci} 588c2ecf20Sopenharmony_ci 598c2ecf20Sopenharmony_cistruct hw_pci ixdp425_pci __initdata = { 608c2ecf20Sopenharmony_ci .nr_controllers = 1, 618c2ecf20Sopenharmony_ci .ops = &ixp4xx_ops, 628c2ecf20Sopenharmony_ci .preinit = ixdp425_pci_preinit, 638c2ecf20Sopenharmony_ci .setup = ixp4xx_setup, 648c2ecf20Sopenharmony_ci .map_irq = ixdp425_map_irq, 658c2ecf20Sopenharmony_ci}; 668c2ecf20Sopenharmony_ci 678c2ecf20Sopenharmony_ciint __init ixdp425_pci_init(void) 688c2ecf20Sopenharmony_ci{ 698c2ecf20Sopenharmony_ci if (machine_is_ixdp425() || machine_is_ixcdp1100() || 708c2ecf20Sopenharmony_ci machine_is_ixdp465() || machine_is_kixrp435()) 718c2ecf20Sopenharmony_ci pci_common_init(&ixdp425_pci); 728c2ecf20Sopenharmony_ci return 0; 738c2ecf20Sopenharmony_ci} 748c2ecf20Sopenharmony_ci 758c2ecf20Sopenharmony_cisubsys_initcall(ixdp425_pci_init); 76