mirror of https://gitee.com/openkylin/linux.git
124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
|
/*
|
||
|
|
* arch/arm/mach-iop3xx/iq80321-pci.c
|
||
|
|
*
|
||
|
|
* PCI support for the Intel IQ80321 reference board
|
||
|
|
*
|
||
|
|
* Author: Rory Bolt <rorybolt@pacbell.net>
|
||
|
|
* Copyright (C) 2002 Rory Bolt
|
||
|
|
* Copyright (C) 2004 Intel Corp.
|
||
|
|
*
|
||
|
|
* 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/kernel.h>
|
||
|
|
#include <linux/pci.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
|
||
|
|
#include <asm/hardware.h>
|
||
|
|
#include <asm/irq.h>
|
||
|
|
#include <asm/mach/pci.h>
|
||
|
|
#include <asm/mach-types.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The following macro is used to lookup irqs in a standard table
|
||
|
|
* format for those systems that do not already have PCI
|
||
|
|
* interrupts properly routed. We assume 1 <= pin <= 4
|
||
|
|
*/
|
||
|
|
#define PCI_IRQ_TABLE_LOOKUP(minid,maxid) \
|
||
|
|
({ int _ctl_ = -1; \
|
||
|
|
unsigned int _idsel = idsel - minid; \
|
||
|
|
if (_idsel <= maxid) \
|
||
|
|
_ctl_ = pci_irq_table[_idsel][pin-1]; \
|
||
|
|
_ctl_; })
|
||
|
|
|
||
|
|
#define INTA IRQ_IQ80321_INTA
|
||
|
|
#define INTB IRQ_IQ80321_INTB
|
||
|
|
#define INTC IRQ_IQ80321_INTC
|
||
|
|
#define INTD IRQ_IQ80321_INTD
|
||
|
|
|
||
|
|
#define INTE IRQ_IQ80321_I82544
|
||
|
|
|
||
|
|
static inline int __init
|
||
|
|
iq80321_map_irq(struct pci_dev *dev, u8 idsel, u8 pin)
|
||
|
|
{
|
||
|
|
static int pci_irq_table[][4] = {
|
||
|
|
/*
|
||
|
|
* PCI IDSEL/INTPIN->INTLINE
|
||
|
|
* A B C D
|
||
|
|
*/
|
||
|
|
{INTE, INTE, INTE, INTE}, /* Gig-E */
|
||
|
|
{-1, -1, -1, -1}, /* Unused */
|
||
|
|
{INTC, INTD, INTA, INTB}, /* PCI-X Slot */
|
||
|
|
{-1, -1, -1, -1},
|
||
|
|
};
|
||
|
|
|
||
|
|
BUG_ON(pin < 1 || pin > 4);
|
||
|
|
|
||
|
|
// return PCI_IRQ_TABLE_LOOKUP(4, 7);
|
||
|
|
return pci_irq_table[idsel%4][pin-1];
|
||
|
|
}
|
||
|
|
|
||
|
|
static int iq80321_setup(int nr, struct pci_sys_data *sys)
|
||
|
|
{
|
||
|
|
struct resource *res;
|
||
|
|
|
||
|
|
if(nr != 0)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
res = kmalloc(sizeof(struct resource) * 2, GFP_KERNEL);
|
||
|
|
if (!res)
|
||
|
|
panic("PCI: unable to alloc resources");
|
||
|
|
|
||
|
|
memset(res, 0, sizeof(struct resource) * 2);
|
||
|
|
|
||
|
|
res[0].start = IOP321_PCI_LOWER_IO_VA;
|
||
|
|
res[0].end = IOP321_PCI_UPPER_IO_VA;
|
||
|
|
res[0].name = "IQ80321 PCI I/O Space";
|
||
|
|
res[0].flags = IORESOURCE_IO;
|
||
|
|
|
||
|
|
res[1].start = IOP321_PCI_LOWER_MEM_PA;
|
||
|
|
res[1].end = IOP321_PCI_UPPER_MEM_PA;
|
||
|
|
res[1].name = "IQ80321 PCI Memory Space";
|
||
|
|
res[1].flags = IORESOURCE_MEM;
|
||
|
|
|
||
|
|
request_resource(&ioport_resource, &res[0]);
|
||
|
|
request_resource(&iomem_resource, &res[1]);
|
||
|
|
|
||
|
|
sys->mem_offset = IOP321_PCI_MEM_OFFSET;
|
||
|
|
sys->io_offset = IOP321_PCI_IO_OFFSET;
|
||
|
|
|
||
|
|
sys->resource[0] = &res[0];
|
||
|
|
sys->resource[1] = &res[1];
|
||
|
|
sys->resource[2] = NULL;
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void iq80321_preinit(void)
|
||
|
|
{
|
||
|
|
iop321_init();
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct hw_pci iq80321_pci __initdata = {
|
||
|
|
.swizzle = pci_std_swizzle,
|
||
|
|
.nr_controllers = 1,
|
||
|
|
.setup = iq80321_setup,
|
||
|
|
.scan = iop321_scan_bus,
|
||
|
|
.preinit = iq80321_preinit,
|
||
|
|
.map_irq = iq80321_map_irq
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init iq80321_pci_init(void)
|
||
|
|
{
|
||
|
|
if (machine_is_iq80321())
|
||
|
|
pci_common_init(&iq80321_pci);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
subsys_initcall(iq80321_pci_init);
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|