f8e5b28413
Patch from Lennert Buytenhek Most ixp2000 boards don't actually work if pci=firmware isn't used, so the defconfig isn't really the right place to specify this. Instead of specifying it in the defconfigs, make the relevant board code take care of setting pci=firmware. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
181 lines
4.5 KiB
C
181 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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