| 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_IQ31244_INTA |
| 36 | #define INTB IRQ_IQ31244_INTB |
| 37 | #define INTC IRQ_IQ31244_INTC |
| 38 | #define INTD IRQ_IQ31244_INTD |
| 39 | |
| 40 | #define INTE IRQ_IQ31244_I82546 |
| 41 | |
| 42 | static inline int __init |
| 43 | iq31244_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 | #ifdef CONFIG_ARCH_EP80219 |
| 51 | {INTB, INTB, INTB, INTB}, /* CFlash */ |
| 52 | {INTE, INTE, INTE, INTE}, /* 82551 Pro 100 */ |
| 53 | {INTD, INTD, INTD, INTD}, /* PCI-X Slot */ |
| 54 | {INTC, INTC, INTC, INTC}, /* SATA */ |
| 55 | #else |
| 56 | {INTB, INTB, INTB, INTB}, /* CFlash */ |
| 57 | {INTC, INTC, INTC, INTC}, /* SATA */ |
| 58 | {INTD, INTD, INTD, INTD}, /* PCI-X Slot */ |
| 59 | {INTE, INTE, INTE, INTE}, /* 82546 GigE */ |
| 60 | #endif // CONFIG_ARCH_EP80219 |
| 61 | }; |
| 62 | |
| 63 | BUG_ON(pin < 1 || pin > 4); |
| 64 | |
| 65 | return PCI_IRQ_TABLE_LOOKUP(0, 7); |
| 66 | } |
| 67 | |
| 68 | static int iq31244_setup(int nr, struct pci_sys_data *sys) |
| 69 | { |
| 70 | struct resource *res; |
| 71 | |
| 72 | if(nr != 0) |
| 73 | return 0; |
| 74 | |
| 75 | res = kmalloc(sizeof(struct resource) * 2, GFP_KERNEL); |
| 76 | if (!res) |
| 77 | panic("PCI: unable to alloc resources"); |
| 78 | |
| 79 | memset(res, 0, sizeof(struct resource) * 2); |
| 80 | |
| 81 | res[0].start = IOP321_PCI_LOWER_IO_VA; |
| 82 | res[0].end = IOP321_PCI_UPPER_IO_VA; |
| 83 | res[0].name = "IQ31244 PCI I/O Space"; |
| 84 | res[0].flags = IORESOURCE_IO; |
| 85 | |
| 86 | res[1].start = IOP321_PCI_LOWER_MEM_PA; |
| 87 | res[1].end = IOP321_PCI_UPPER_MEM_PA; |
| 88 | res[1].name = "IQ31244 PCI Memory Space"; |
| 89 | res[1].flags = IORESOURCE_MEM; |
| 90 | |
| 91 | request_resource(&ioport_resource, &res[0]); |
| 92 | request_resource(&iomem_resource, &res[1]); |
| 93 | |
| 94 | sys->mem_offset = IOP321_PCI_MEM_OFFSET; |
| 95 | sys->io_offset = IOP321_PCI_IO_OFFSET; |
| 96 | |
| 97 | sys->resource[0] = &res[0]; |
| 98 | sys->resource[1] = &res[1]; |
| 99 | sys->resource[2] = NULL; |
| 100 | |
| 101 | return 1; |
| 102 | } |
| 103 | |
| 104 | static void iq31244_preinit(void) |
| 105 | { |
| 106 | iop321_init(); |
| 107 | } |
| 108 | |
| 109 | static struct hw_pci iq31244_pci __initdata = { |
| 110 | .swizzle = pci_std_swizzle, |
| 111 | .nr_controllers = 1, |
| 112 | .setup = iq31244_setup, |
| 113 | .scan = iop321_scan_bus, |
| 114 | .preinit = iq31244_preinit, |
| 115 | .map_irq = iq31244_map_irq |
| 116 | }; |
| 117 | |
| 118 | static int __init iq31244_pci_init(void) |
| 119 | { |
| 120 | if (machine_is_iq31244()) |
| 121 | pci_common_init(&iq31244_pci); |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | subsys_initcall(iq31244_pci_init); |
| 126 | |
| 127 | |
| 128 | |
| 129 | |