89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
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/*
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* linux/arch/sh/kernel/pci-bigsur.c
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*
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* By Dustin McIntire (dustin@sensoria.com) (c)2001
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*
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* Ported to new API by Paul Mundt <lethal@linux-sh.org>.
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*
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* May be copied or modified under the terms of the GNU General Public
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* License. See linux/COPYING for more information.
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*
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* PCI initialization for the Hitachi Big Sur Evaluation Board
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <asm/io.h>
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#include "pci-sh7751.h"
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#include <asm/bigsur/bigsur.h>
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#define BIGSUR_PCI_IO 0x4000
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#define BIGSUR_PCI_MEM 0xfd000000
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static struct resource sh7751_io_resource = {
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.name = "SH7751 IO",
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.start = BIGSUR_PCI_IO,
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.end = BIGSUR_PCI_IO + (64*1024) - 1,
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.flags = IORESOURCE_IO,
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};
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static struct resource sh7751_mem_resource = {
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.name = "SH7751 mem",
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.start = BIGSUR_PCI_MEM,
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.end = BIGSUR_PCI_MEM + (64*1024*1024) - 1,
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.flags = IORESOURCE_MEM,
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};
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extern struct pci_ops sh7751_pci_ops;
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struct pci_channel board_pci_channels[] = {
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{ &sh7751_pci_ops, &sh7751_io_resource, &sh7751_mem_resource, 0, 0xff },
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{ 0, }
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};
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static struct sh7751_pci_address_map sh7751_pci_map = {
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.window0 = {
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.base = SH7751_CS3_BASE_ADDR,
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.size = BIGSUR_LSR0_SIZE,
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},
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.window1 = {
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.base = SH7751_CS3_BASE_ADDR,
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.size = BIGSUR_LSR1_SIZE,
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},
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};
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/*
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* Initialize the Big Sur PCI interface
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* Setup hardware to be Central Funtion
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* Copy the BSR regs to the PCI interface
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* Setup PCI windows into local RAM
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*/
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int __init pcibios_init_platform(void)
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{
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return sh7751_pcic_init(&sh7751_pci_map);
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}
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int pcibios_map_platform_irq(u8 slot, u8 pin)
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{
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/*
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* The Big Sur can be used in a CPCI chassis, but the SH7751 PCI
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* interface is on the wrong end of the board so that it can also
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* support a V320 CPI interface chip... Therefor the IRQ mapping is
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* somewhat use dependent... I'l assume a linear map for now, i.e.
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* INTA=slot0,pin0... INTD=slot3,pin0...
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*/
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int irq = (slot + pin-1) % 4 + BIGSUR_SH7751_PCI_IRQ_BASE;
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PCIDBG(2, "PCI: Mapping Big Sur IRQ for slot %d, pin %c to irq %d\n",
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slot, pin-1+'A', irq);
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return irq;
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}
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