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79 lines
1.8 KiB
79 lines
1.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* arch/arm/mach-ixp4xx/avila-pci.c |
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* |
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* Gateworks Avila board-level PCI initialization |
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* |
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* Author: Michael-Luke Jones <[email protected]> |
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* |
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* Based on ixdp-pci.c |
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* Copyright (C) 2002 Intel Corporation. |
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* Copyright (C) 2003-2004 MontaVista Software, Inc. |
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* |
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* Maintainer: Deepak Saxena <[email protected]> |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/pci.h> |
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#include <linux/init.h> |
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#include <linux/irq.h> |
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#include <linux/delay.h> |
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#include <asm/mach/pci.h> |
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#include <asm/irq.h> |
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#include <mach/hardware.h> |
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#include <asm/mach-types.h> |
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#include "irqs.h" |
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#define AVILA_MAX_DEV 4 |
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#define LOFT_MAX_DEV 6 |
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#define IRQ_LINES 4 |
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/* PCI controller GPIO to IRQ pin mappings */ |
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#define INTA 11 |
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#define INTB 10 |
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#define INTC 9 |
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#define INTD 8 |
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void __init avila_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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irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); |
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irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW); |
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ixp4xx_pci_preinit(); |
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} |
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static int __init avila_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
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{ |
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static int pci_irq_table[IRQ_LINES] = { |
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IXP4XX_GPIO_IRQ(INTA), |
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IXP4XX_GPIO_IRQ(INTB), |
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IXP4XX_GPIO_IRQ(INTC), |
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IXP4XX_GPIO_IRQ(INTD) |
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}; |
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if (slot >= 1 && |
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slot <= (machine_is_loft() ? LOFT_MAX_DEV : AVILA_MAX_DEV) && |
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pin >= 1 && pin <= IRQ_LINES) |
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return pci_irq_table[(slot + pin - 2) % 4]; |
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return -1; |
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} |
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struct hw_pci avila_pci __initdata = { |
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.nr_controllers = 1, |
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.ops = &ixp4xx_ops, |
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.preinit = avila_pci_preinit, |
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.setup = ixp4xx_setup, |
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.map_irq = avila_map_irq, |
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}; |
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int __init avila_pci_init(void) |
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{ |
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if (machine_is_avila() || machine_is_loft()) |
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pci_common_init(&avila_pci); |
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return 0; |
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} |
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subsys_initcall(avila_pci_init);
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