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/*
* linux/arch/sh/kernel/pci-bigsur.c
*
* By Dustin McIntire (dustin@sensoria.com) (c)2001
*
* Ported to new API by Paul Mundt <lethal@linux-sh.org>.
*
* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
*
* PCI initialization for the Hitachi Big Sur Evaluation Board
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <asm/io.h>
#include "pci-sh4.h"
#include <asm/bigsur/bigsur.h>
#define BIGSUR_PCI_IO 0x4000
#define BIGSUR_PCI_MEM 0xfd000000
static struct resource sh7751_io_resource = {
.name = "SH7751 IO",
.start = BIGSUR_PCI_IO,
.end = BIGSUR_PCI_IO + (64*1024) - 1,
.flags = IORESOURCE_IO,
};
static struct resource sh7751_mem_resource = {
.name = "SH7751 mem",
.start = BIGSUR_PCI_MEM,
.end = BIGSUR_PCI_MEM + (64*1024*1024) - 1,
.flags = IORESOURCE_MEM,
};
extern struct pci_ops sh7751_pci_ops;
struct pci_channel board_pci_channels[] = {
{ &sh4_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
{ 0, }
};
static struct sh4_pci_address_map sh7751_pci_map = {
.window0 = {
.base = SH7751_CS3_BASE_ADDR,
.size = BIGSUR_LSR0_SIZE,
},
.window1 = {
.base = SH7751_CS3_BASE_ADDR,
.size = BIGSUR_LSR1_SIZE,
},
};
/*
* Initialize the Big Sur PCI interface
* Setup hardware to be Central Funtion
* Copy the BSR regs to the PCI interface
* Setup PCI windows into local RAM
*/
int __init pcibios_init_platform(void)
{
return sh7751_pcic_init(&sh7751_pci_map);
}
int __init pcibios_map_platform_irq(struct pci_dev *pdev, u8 slot, u8 pin)
{
/*
* The Big Sur can be used in a CPCI chassis, but the SH7751 PCI
* interface is on the wrong end of the board so that it can also
* support a V320 CPI interface chip... Therefor the IRQ mapping is
* somewhat use dependent... I'l assume a linear map for now, i.e.
* INTA=slot0,pin0... INTD=slot3,pin0...
*/
int irq = (slot + pin-1) % 4 + BIGSUR_SH7751_PCI_IRQ_BASE;
PCIDBG(2, "PCI: Mapping Big Sur IRQ for slot %d, pin %c to irq %d\n",
slot, pin-1+'A', irq);
return irq;
}
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