Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 2 | /* |
| 3 | * arch/arm/mach-ixp4xx/nas100d-pci.c |
| 4 | * |
| 5 | * NAS 100d board-level PCI initialization |
| 6 | * |
| 7 | * based on ixdp425-pci.c: |
| 8 | * Copyright (C) 2002 Intel Corporation. |
| 9 | * Copyright (C) 2003-2004 MontaVista Software, Inc. |
| 10 | * |
| 11 | * Maintainer: http://www.nslu2-linux.org/ |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 12 | */ |
| 13 | |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 14 | #include <linux/pci.h> |
| 15 | #include <linux/init.h> |
Thomas Gleixner | 698dfe2 | 2006-07-01 23:01:49 +0100 | [diff] [blame] | 16 | #include <linux/irq.h> |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 17 | #include <asm/mach/pci.h> |
| 18 | #include <asm/mach-types.h> |
| 19 | |
Linus Walleij | dc8ef8cd | 2018-12-29 15:47:52 +0100 | [diff] [blame] | 20 | #include "irqs.h" |
| 21 | |
Krzysztof Hałasa | 8d3fdf3 | 2009-11-17 18:48:23 +0100 | [diff] [blame] | 22 | #define MAX_DEV 3 |
| 23 | #define IRQ_LINES 3 |
Krzysztof Hałasa | 23fa684 | 2009-11-16 16:06:47 +0100 | [diff] [blame] | 24 | |
| 25 | /* PCI controller GPIO to IRQ pin mappings */ |
Krzysztof Hałasa | 8d3fdf3 | 2009-11-17 18:48:23 +0100 | [diff] [blame] | 26 | #define INTA 11 |
| 27 | #define INTB 10 |
| 28 | #define INTC 9 |
| 29 | #define INTD 8 |
| 30 | #define INTE 7 |
Krzysztof Hałasa | 23fa684 | 2009-11-16 16:06:47 +0100 | [diff] [blame] | 31 | |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 32 | void __init nas100d_pci_preinit(void) |
| 33 | { |
Thomas Gleixner | 6845664a | 2011-03-24 13:25:22 +0100 | [diff] [blame] | 34 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); |
| 35 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); |
| 36 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); |
| 37 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW); |
| 38 | irq_set_irq_type(IXP4XX_GPIO_IRQ(INTE), IRQ_TYPE_LEVEL_LOW); |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 39 | ixp4xx_pci_preinit(); |
| 40 | } |
| 41 | |
Ralf Baechle | d534194 | 2011-06-10 15:30:21 +0100 | [diff] [blame] | 42 | static int __init nas100d_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 43 | { |
Krzysztof Hałasa | 8d3fdf3 | 2009-11-17 18:48:23 +0100 | [diff] [blame] | 44 | static int pci_irq_table[MAX_DEV][IRQ_LINES] = { |
| 45 | { IXP4XX_GPIO_IRQ(INTA), -1, -1 }, |
| 46 | { IXP4XX_GPIO_IRQ(INTB), -1, -1 }, |
| 47 | { IXP4XX_GPIO_IRQ(INTC), IXP4XX_GPIO_IRQ(INTD), |
| 48 | IXP4XX_GPIO_IRQ(INTE) }, |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 49 | }; |
| 50 | |
Krzysztof Hałasa | 8d3fdf3 | 2009-11-17 18:48:23 +0100 | [diff] [blame] | 51 | if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) |
| 52 | return pci_irq_table[slot - 1][pin - 1]; |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 53 | |
Krzysztof Hałasa | 8d3fdf3 | 2009-11-17 18:48:23 +0100 | [diff] [blame] | 54 | return -1; |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 55 | } |
| 56 | |
| 57 | struct hw_pci __initdata nas100d_pci = { |
| 58 | .nr_controllers = 1, |
Russell King | c23bfc3 | 2012-03-10 12:49:16 +0000 | [diff] [blame] | 59 | .ops = &ixp4xx_ops, |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 60 | .preinit = nas100d_pci_preinit, |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 61 | .setup = ixp4xx_setup, |
Rod Whitby | 3145d8a | 2006-01-04 17:17:11 +0000 | [diff] [blame] | 62 | .map_irq = nas100d_map_irq, |
| 63 | }; |
| 64 | |
| 65 | int __init nas100d_pci_init(void) |
| 66 | { |
| 67 | if (machine_is_nas100d()) |
| 68 | pci_common_init(&nas100d_pci); |
| 69 | |
| 70 | return 0; |
| 71 | } |
| 72 | |
| 73 | subsys_initcall(nas100d_pci_init); |