2 * arch/arm/mach-ixp4xx/prpmc1100-pci.c
4 * PrPMC1100 PCI initialization
6 * Copyright (C) 2003-2004 MontaVista Sofwtare, Inc.
7 * Based on IXDP425 code originally (C) Intel Corporation
9 * Author: Deepak Saxena <dsaxena@plexity.net>
11 * PrPMC1100 PCI init code. GPIO usage is similar to that on
12 * IXDP425, but the IRQ routing is completely different and
13 * depends on what carrier you are using. This code is written
14 * to work on the Motorola PrPMC800 ATX carrier board.
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2 as
18 * published by the Free Software Foundation.
22 #include <linux/kernel.h>
23 #include <linux/config.h>
24 #include <linux/pci.h>
25 #include <linux/init.h>
27 #include <asm/mach-types.h>
29 #include <asm/hardware.h>
31 #include <asm/mach/pci.h>
34 void __init prpmc1100_pci_preinit(void)
36 gpio_line_config(PRPMC1100_PCI_INTA_PIN,
37 IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
38 gpio_line_config(PRPMC1100_PCI_INTB_PIN,
39 IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
40 gpio_line_config(PRPMC1100_PCI_INTC_PIN,
41 IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
42 gpio_line_config(PRPMC1100_PCI_INTD_PIN,
43 IXP4XX_GPIO_IN | IXP4XX_GPIO_ACTIVE_LOW);
45 gpio_line_isr_clear(PRPMC1100_PCI_INTA_PIN);
46 gpio_line_isr_clear(PRPMC1100_PCI_INTB_PIN);
47 gpio_line_isr_clear(PRPMC1100_PCI_INTC_PIN);
48 gpio_line_isr_clear(PRPMC1100_PCI_INTD_PIN);
54 static int __init prpmc1100_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
58 static int pci_irq_table[][4] = {
59 { /* IDSEL 16 - PMC A1 */
60 IRQ_PRPMC1100_PCI_INTD,
61 IRQ_PRPMC1100_PCI_INTA,
62 IRQ_PRPMC1100_PCI_INTB,
63 IRQ_PRPMC1100_PCI_INTC
64 }, { /* IDSEL 17 - PRPMC-A-B */
65 IRQ_PRPMC1100_PCI_INTD,
66 IRQ_PRPMC1100_PCI_INTA,
67 IRQ_PRPMC1100_PCI_INTB,
68 IRQ_PRPMC1100_PCI_INTC
69 }, { /* IDSEL 18 - PMC A1-B */
70 IRQ_PRPMC1100_PCI_INTA,
71 IRQ_PRPMC1100_PCI_INTB,
72 IRQ_PRPMC1100_PCI_INTC,
73 IRQ_PRPMC1100_PCI_INTD
74 }, { /* IDSEL 19 - Unused */
76 }, { /* IDSEL 20 - P2P Bridge */
77 IRQ_PRPMC1100_PCI_INTA,
78 IRQ_PRPMC1100_PCI_INTB,
79 IRQ_PRPMC1100_PCI_INTC,
80 IRQ_PRPMC1100_PCI_INTD
81 }, { /* IDSEL 21 - PMC A2 */
82 IRQ_PRPMC1100_PCI_INTC,
83 IRQ_PRPMC1100_PCI_INTD,
84 IRQ_PRPMC1100_PCI_INTA,
85 IRQ_PRPMC1100_PCI_INTB
86 }, { /* IDSEL 22 - PMC A2-B */
87 IRQ_PRPMC1100_PCI_INTD,
88 IRQ_PRPMC1100_PCI_INTA,
89 IRQ_PRPMC1100_PCI_INTB,
90 IRQ_PRPMC1100_PCI_INTC
94 if (slot >= PRPMC1100_PCI_MIN_DEVID && slot <= PRPMC1100_PCI_MAX_DEVID
95 && pin >= 1 && pin <= PRPMC1100_PCI_IRQ_LINES) {
96 irq = pci_irq_table[slot - PRPMC1100_PCI_MIN_DEVID][pin - 1];
103 struct hw_pci prpmc1100_pci __initdata = {
105 .preinit = prpmc1100_pci_preinit,
106 .swizzle = pci_std_swizzle,
107 .setup = ixp4xx_setup,
108 .scan = ixp4xx_scan_bus,
109 .map_irq = prpmc1100_map_irq,
112 int __init prpmc1100_pci_init(void)
114 if (machine_is_prpmc1100())
115 pci_common_init(&prpmc1100_pci);
119 subsys_initcall(prpmc1100_pci_init);