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/arch/arm/mach-iop3xx/iq80332-pci.c

https://bitbucket.org/evzijst/gittest
C | 125 lines | 78 code | 25 blank | 22 comment | 6 complexity | 2f54b69df8ad12c9340206159c66a40a MD5 | raw file
  1/*
  2 * arch/arm/mach-iop3xx/iq80332-pci.c
  3 *
  4 * PCI support for the Intel IQ80332 reference board
  5 *
  6 * Author: Dave Jiang <dave.jiang@intel.com>
  7 * Copyright (C) 2004 Intel Corp.
  8 *
  9 * This program is free software; you can redistribute it and/or modify
 10 * it under the terms of the GNU General Public License version 2 as
 11 * published by the Free Software Foundation.
 12 */
 13#include <linux/kernel.h>
 14#include <linux/pci.h>
 15#include <linux/init.h>
 16
 17#include <asm/hardware.h>
 18#include <asm/irq.h>
 19#include <asm/mach/pci.h>
 20#include <asm/mach-types.h>
 21
 22/*
 23 * The following macro is used to lookup irqs in a standard table
 24 * format for those systems that do not already have PCI
 25 * interrupts properly routed.  We assume 1 <= pin <= 4
 26 */
 27#define PCI_IRQ_TABLE_LOOKUP(minid,maxid)	\
 28({ int _ctl_ = -1;				\
 29   unsigned int _idsel = idsel - minid;		\
 30   if (_idsel <= maxid)				\
 31      _ctl_ = pci_irq_table[_idsel][pin-1];	\
 32   _ctl_; })
 33
 34#define INTA	IRQ_IQ80332_INTA
 35#define INTB	IRQ_IQ80332_INTB
 36#define INTC	IRQ_IQ80332_INTC
 37#define INTD	IRQ_IQ80332_INTD
 38
 39//#define INTE	IRQ_IQ80332_I82544
 40
 41static inline int __init
 42iq80332_map_irq(struct pci_dev *dev, u8 idsel, u8 pin)
 43{
 44	static int pci_irq_table[][8] = {
 45		/*
 46		 * PCI IDSEL/INTPIN->INTLINE
 47		 * A       B       C       D
 48		 */
 49		{-1,   -1,   -1,   -1},
 50		{-1,   -1,   -1,   -1},
 51		{-1,   -1,   -1,   -1},
 52		{INTA, INTB, INTC, INTD}, /* PCI-X Slot */
 53		{-1,   -1,   -1,   -1},
 54		{INTC, INTC, INTC, INTC}, /* GigE  */
 55		{-1,   -1,   -1,   -1},
 56		{-1,   -1,   -1,   -1},
 57	};
 58
 59	BUG_ON(pin < 1 || pin > 4);
 60
 61	return PCI_IRQ_TABLE_LOOKUP(1, 7);
 62}
 63
 64static int iq80332_setup(int nr, struct pci_sys_data *sys)
 65{
 66	struct resource *res;
 67
 68	if(nr != 0)
 69		return 0;
 70
 71	res = kmalloc(sizeof(struct resource) * 2, GFP_KERNEL);
 72	if (!res)
 73		panic("PCI: unable to alloc resources");
 74
 75	memset(res, 0, sizeof(struct resource) * 2);
 76
 77	res[0].start = IOP331_PCI_LOWER_IO_VA;
 78	res[0].end   = IOP331_PCI_UPPER_IO_VA;
 79	res[0].name  = "IQ80332 PCI I/O Space";
 80	res[0].flags = IORESOURCE_IO;
 81
 82	res[1].start = IOP331_PCI_LOWER_MEM_PA;
 83	res[1].end   = IOP331_PCI_UPPER_MEM_PA;
 84	res[1].name  = "IQ80332 PCI Memory Space";
 85	res[1].flags = IORESOURCE_MEM;
 86
 87	request_resource(&ioport_resource, &res[0]);
 88	request_resource(&iomem_resource, &res[1]);
 89
 90	sys->mem_offset = IOP331_PCI_MEM_OFFSET;
 91	sys->io_offset  = IOP331_PCI_IO_OFFSET;
 92
 93	sys->resource[0] = &res[0];
 94	sys->resource[1] = &res[1];
 95	sys->resource[2] = NULL;
 96
 97	return 1;
 98}
 99
100static void iq80332_preinit(void)
101{
102	iop331_init();
103}
104
105static struct hw_pci iq80332_pci __initdata = {
106	.swizzle	= pci_std_swizzle,
107	.nr_controllers = 1,
108	.setup		= iq80332_setup,
109	.scan		= iop331_scan_bus,
110	.preinit	= iq80332_preinit,
111	.map_irq	= iq80332_map_irq
112};
113
114static int __init iq80332_pci_init(void)
115{
116	if (machine_is_iq80332())
117		pci_common_init(&iq80332_pci);
118	return 0;
119}
120
121subsys_initcall(iq80332_pci_init);
122
123
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125