2 * arch/arm/mach-iop3xx/iq80321-pci.c
4 * PCI support for the Intel IQ80321 reference board
6 * Author: Rory Bolt <rorybolt@pacbell.net>
7 * Copyright (C) 2002 Rory Bolt
8 * Copyright (C) 2004 Intel Corp.
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.
14 #include <linux/kernel.h>
15 #include <linux/pci.h>
16 #include <linux/init.h>
17 #include <linux/string.h>
18 #include <linux/slab.h>
20 #include <asm/hardware.h>
22 #include <asm/mach/pci.h>
23 #include <asm/mach-types.h>
26 * The following macro is used to lookup irqs in a standard table
27 * format for those systems that do not already have PCI
28 * interrupts properly routed. We assume 1 <= pin <= 4
30 #define PCI_IRQ_TABLE_LOOKUP(minid,maxid) \
32 unsigned int _idsel = idsel - minid; \
33 if (_idsel <= maxid) \
34 _ctl_ = pci_irq_table[_idsel][pin-1]; \
37 #define INTA IRQ_IQ80321_INTA
38 #define INTB IRQ_IQ80321_INTB
39 #define INTC IRQ_IQ80321_INTC
40 #define INTD IRQ_IQ80321_INTD
42 #define INTE IRQ_IQ80321_I82544
44 static inline int __init
45 iq80321_map_irq(struct pci_dev *dev, u8 idsel, u8 pin)
47 static int pci_irq_table[][4] = {
49 * PCI IDSEL/INTPIN->INTLINE
52 {INTE, INTE, INTE, INTE}, /* Gig-E */
53 {-1, -1, -1, -1}, /* Unused */
54 {INTC, INTD, INTA, INTB}, /* PCI-X Slot */
58 BUG_ON(pin < 1 || pin > 4);
60 // return PCI_IRQ_TABLE_LOOKUP(4, 7);
61 return pci_irq_table[idsel%4][pin-1];
64 static int iq80321_setup(int nr, struct pci_sys_data *sys)
71 res = kzalloc(sizeof(struct resource) * 2, GFP_KERNEL);
73 panic("PCI: unable to alloc resources");
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;
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;
85 request_resource(&ioport_resource, &res[0]);
86 request_resource(&iomem_resource, &res[1]);
88 sys->mem_offset = IOP321_PCI_MEM_OFFSET;
89 sys->io_offset = IOP321_PCI_IO_OFFSET;
91 sys->resource[0] = &res[0];
92 sys->resource[1] = &res[1];
93 sys->resource[2] = NULL;
98 static void iq80321_preinit(void)
103 static struct hw_pci iq80321_pci __initdata = {
104 .swizzle = pci_std_swizzle,
106 .setup = iq80321_setup,
107 .scan = iop321_scan_bus,
108 .preinit = iq80321_preinit,
109 .map_irq = iq80321_map_irq
112 static int __init iq80321_pci_init(void)
114 if (machine_is_iq80321())
115 pci_common_init(&iq80321_pci);
119 subsys_initcall(iq80321_pci_init);