| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * arch/arm/mach-iop3xx/iq80321-pci.c |
| 3 | * |
| 4 | * PCI support for the Intel IQ80321 reference board |
| 5 | * |
| 6 | * Author: Rory Bolt <rorybolt@pacbell.net> |
| 7 | * Copyright (C) 2002 Rory Bolt |
| 8 | * Copyright (C) 2004 Intel Corp. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/pci.h> |
| 16 | #include <linux/init.h> |
| 17 | |
| 18 | #include <asm/hardware.h> |
| 19 | #include <asm/irq.h> |
| 20 | #include <asm/mach/pci.h> |
| 21 | #include <asm/mach-types.h> |
| 22 | |
| 23 | /* |
| 24 | * The following macro is used to lookup irqs in a standard table |
| 25 | * format for those systems that do not already have PCI |
| 26 | * interrupts properly routed. We assume 1 <= pin <= 4 |
| 27 | */ |
| 28 | #define PCI_IRQ_TABLE_LOOKUP(minid,maxid) \ |
| 29 | ({ int _ctl_ = -1; \ |
| 30 | unsigned int _idsel = idsel - minid; \ |
| 31 | if (_idsel <= maxid) \ |
| 32 | _ctl_ = pci_irq_table[_idsel][pin-1]; \ |
| 33 | _ctl_; }) |
| 34 | |
| 35 | #define INTA IRQ_IQ80321_INTA |
| 36 | #define INTB IRQ_IQ80321_INTB |
| 37 | #define INTC IRQ_IQ80321_INTC |
| 38 | #define INTD IRQ_IQ80321_INTD |
| 39 | |
| 40 | #define INTE IRQ_IQ80321_I82544 |
| 41 | |
| 42 | static inline int __init |
| 43 | iq80321_map_irq(struct pci_dev *dev, u8 idsel, u8 pin) |
| 44 | { |
| 45 | static int pci_irq_table[][4] = { |
| 46 | /* |
| 47 | * PCI IDSEL/INTPIN->INTLINE |
| 48 | * A B C D |
| 49 | */ |
| 50 | {INTE, INTE, INTE, INTE}, /* Gig-E */ |
| 51 | {-1, -1, -1, -1}, /* Unused */ |
| 52 | {INTC, INTD, INTA, INTB}, /* PCI-X Slot */ |
| 53 | {-1, -1, -1, -1}, |
| 54 | }; |
| 55 | |
| 56 | BUG_ON(pin < 1 || pin > 4); |
| 57 | |
| 58 | // return PCI_IRQ_TABLE_LOOKUP(4, 7); |
| 59 | return pci_irq_table[idsel%4][pin-1]; |
| 60 | } |
| 61 | |
| 62 | static int iq80321_setup(int nr, struct pci_sys_data *sys) |
| 63 | { |
| 64 | struct resource *res; |
| 65 | |
| 66 | if(nr != 0) |
| 67 | return 0; |
| 68 | |
| 69 | res = kmalloc(sizeof(struct resource) * 2, GFP_KERNEL); |
| 70 | if (!res) |
| 71 | panic("PCI: unable to alloc resources"); |
| 72 | |
| 73 | memset(res, 0, sizeof(struct resource) * 2); |
| 74 | |
| 75 | res[0].start = IOP321_PCI_LOWER_IO_VA; |
| 76 | res[0].end = IOP321_PCI_UPPER_IO_VA; |
| 77 | res[0].name = "IQ80321 PCI I/O Space"; |
| 78 | res[0].flags = IORESOURCE_IO; |
| 79 | |
| 80 | res[1].start = IOP321_PCI_LOWER_MEM_PA; |
| 81 | res[1].end = IOP321_PCI_UPPER_MEM_PA; |
| 82 | res[1].name = "IQ80321 PCI Memory Space"; |
| 83 | res[1].flags = IORESOURCE_MEM; |
| 84 | |
| 85 | request_resource(&ioport_resource, &res[0]); |
| 86 | request_resource(&iomem_resource, &res[1]); |
| 87 | |
| 88 | sys->mem_offset = IOP321_PCI_MEM_OFFSET; |
| 89 | sys->io_offset = IOP321_PCI_IO_OFFSET; |
| 90 | |
| 91 | sys->resource[0] = &res[0]; |
| 92 | sys->resource[1] = &res[1]; |
| 93 | sys->resource[2] = NULL; |
| 94 | |
| 95 | return 1; |
| 96 | } |
| 97 | |
| 98 | static void iq80321_preinit(void) |
| 99 | { |
| 100 | iop321_init(); |
| 101 | } |
| 102 | |
| 103 | static struct hw_pci iq80321_pci __initdata = { |
| 104 | .swizzle = pci_std_swizzle, |
| 105 | .nr_controllers = 1, |
| 106 | .setup = iq80321_setup, |
| 107 | .scan = iop321_scan_bus, |
| 108 | .preinit = iq80321_preinit, |
| 109 | .map_irq = iq80321_map_irq |
| 110 | }; |
| 111 | |
| 112 | static int __init iq80321_pci_init(void) |
| 113 | { |
| 114 | if (machine_is_iq80321()) |
| 115 | pci_common_init(&iq80321_pci); |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | subsys_initcall(iq80321_pci_init); |
| 120 | |
| 121 | |
| 122 | |
| 123 | |