mirror of https://gitee.com/openkylin/linux.git
182 lines
4.5 KiB
C
182 lines
4.5 KiB
C
/*
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* arch/arm/mach-ixp2000/ixdp2400.c
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*
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* IXDP2400 platform support
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*
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* Original Author: Naeem Afzal <naeem.m.afzal@intel.com>
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* Maintainer: Deepak Saxena <dsaxena@plexity.net>
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*
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* Copyright (C) 2002 Intel Corp.
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* Copyright (C) 2003-2004 MontaVista Software, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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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/init.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <linux/bitops.h>
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#include <linux/pci.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <asm/system.h>
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#include <asm/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/mach/pci.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include <asm/mach/time.h>
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#include <asm/mach/flash.h>
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#include <asm/mach/arch.h>
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/*************************************************************************
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* IXDP2400 timer tick
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*************************************************************************/
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static void __init ixdp2400_timer_init(void)
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{
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int numerator, denominator;
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int denom_array[] = {2, 4, 8, 16, 1, 2, 4, 8};
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numerator = (*(IXDP2400_CPLD_SYS_CLK_M) & 0xFF) *2;
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denominator = denom_array[(*(IXDP2400_CPLD_SYS_CLK_N) & 0x7)];
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ixp2000_init_time(((3125000 * numerator) / (denominator)) / 2);
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}
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static struct sys_timer ixdp2400_timer = {
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.init = ixdp2400_timer_init,
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.offset = ixp2000_gettimeoffset,
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};
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/*************************************************************************
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* IXDP2400 PCI
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*************************************************************************/
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void __init ixdp2400_pci_preinit(void)
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{
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ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
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ixp2000_pci_preinit();
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pcibios_setup("firmware");
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}
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int ixdp2400_pci_setup(int nr, struct pci_sys_data *sys)
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{
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sys->mem_offset = 0xe0000000;
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ixp2000_pci_setup(nr, sys);
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return 1;
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}
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static int __init ixdp2400_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
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{
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if (ixdp2x00_master_npu()) {
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/*
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* Root bus devices. Slave NPU is only one with interrupt.
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* Everything else, we just return -1 b/c nothing else
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* on the root bus has interrupts.
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*/
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if(!dev->bus->self) {
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if(dev->devfn == IXDP2X00_SLAVE_NPU_DEVFN )
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return IRQ_IXDP2400_INGRESS_NPU;
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return -1;
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}
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/*
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* Bridge behind the PMC slot.
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* NOTE: Only INTA from the PMC slot is routed. VERY BAD.
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*/
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if(dev->bus->self->devfn == IXDP2X00_PMC_DEVFN &&
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dev->bus->parent->self->devfn == IXDP2X00_P2P_DEVFN &&
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!dev->bus->parent->self->bus->parent)
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return IRQ_IXDP2400_PMC;
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/*
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* Device behind the first bridge
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*/
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if(dev->bus->self->devfn == IXDP2X00_P2P_DEVFN) {
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switch(dev->devfn) {
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case IXDP2400_MASTER_ENET_DEVFN:
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return IRQ_IXDP2400_ENET;
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case IXDP2400_MEDIA_DEVFN:
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return IRQ_IXDP2400_MEDIA_PCI;
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case IXDP2400_SWITCH_FABRIC_DEVFN:
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return IRQ_IXDP2400_SF_PCI;
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case IXDP2X00_PMC_DEVFN:
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return IRQ_IXDP2400_PMC;
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}
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}
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return -1;
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} else return IRQ_IXP2000_PCIB; /* Slave NIC interrupt */
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}
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static void ixdp2400_pci_postinit(void)
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{
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struct pci_dev *dev;
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if (ixdp2x00_master_npu()) {
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dev = pci_find_slot(1, IXDP2400_SLAVE_ENET_DEVFN);
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pci_remove_bus_device(dev);
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} else {
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dev = pci_find_slot(1, IXDP2400_MASTER_ENET_DEVFN);
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pci_remove_bus_device(dev);
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ixdp2x00_slave_pci_postinit();
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}
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}
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static struct hw_pci ixdp2400_pci __initdata = {
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.nr_controllers = 1,
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.setup = ixdp2400_pci_setup,
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.preinit = ixdp2400_pci_preinit,
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.postinit = ixdp2400_pci_postinit,
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.scan = ixp2000_pci_scan_bus,
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.map_irq = ixdp2400_pci_map_irq,
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};
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int __init ixdp2400_pci_init(void)
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{
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if (machine_is_ixdp2400())
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pci_common_init(&ixdp2400_pci);
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return 0;
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}
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subsys_initcall(ixdp2400_pci_init);
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void ixdp2400_init_irq(void)
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{
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ixdp2x00_init_irq(IXDP2400_CPLD_INT_STAT, IXDP2400_CPLD_INT_MASK, IXDP2400_NR_IRQS);
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}
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MACHINE_START(IXDP2400, "Intel IXDP2400 Development Platform")
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/* Maintainer: MontaVista Software, Inc. */
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.phys_io = IXP2000_UART_PHYS_BASE,
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.io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
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.boot_params = 0x00000100,
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.map_io = ixdp2x00_map_io,
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.init_irq = ixdp2400_init_irq,
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.timer = &ixdp2400_timer,
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.init_machine = ixdp2x00_init_machine,
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MACHINE_END
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