| /* |
| * arch/arch/mach-ixp4xx/vulcan-pci.c |
| * |
| * Vulcan board-level PCI initialization |
| * |
| * Copyright (C) 2010 Marc Zyngier <maz@misterjones.org> |
| * |
| * based on ixdp425-pci.c: |
| * Copyright (C) 2002 Intel Corporation. |
| * Copyright (C) 2003-2004 MontaVista Software, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| */ |
| |
| #include <linux/pci.h> |
| #include <linux/init.h> |
| #include <linux/irq.h> |
| #include <asm/mach/pci.h> |
| #include <asm/mach-types.h> |
| |
| /* PCI controller GPIO to IRQ pin mappings */ |
| #define INTA 2 |
| #define INTB 3 |
| |
| void __init vulcan_pci_preinit(void) |
| { |
| #ifndef CONFIG_IXP4XX_INDIRECT_PCI |
| /* |
| * Cardbus bridge wants way more than the SoC can actually offer, |
| * and leaves the whole PCI bus in a mess. Artificially limit it |
| * to 8MB per region. Of course indirect mode doesn't have this |
| * limitation... |
| */ |
| pci_cardbus_mem_size = SZ_8M; |
| pr_info("Vulcan PCI: limiting CardBus memory size to %dMB\n", |
| (int)(pci_cardbus_mem_size >> 20)); |
| #endif |
| irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); |
| irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); |
| ixp4xx_pci_preinit(); |
| } |
| |
| static int __init vulcan_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
| { |
| if (slot == 1) |
| return IXP4XX_GPIO_IRQ(INTA); |
| |
| if (slot == 2) |
| return IXP4XX_GPIO_IRQ(INTB); |
| |
| return -1; |
| } |
| |
| struct hw_pci vulcan_pci __initdata = { |
| .nr_controllers = 1, |
| .preinit = vulcan_pci_preinit, |
| .swizzle = pci_std_swizzle, |
| .setup = ixp4xx_setup, |
| .scan = ixp4xx_scan_bus, |
| .map_irq = vulcan_map_irq, |
| }; |
| |
| int __init vulcan_pci_init(void) |
| { |
| if (machine_is_arcom_vulcan()) |
| pci_common_init(&vulcan_pci); |
| return 0; |
| } |
| |
| subsys_initcall(vulcan_pci_init); |