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OpenCloudOS-Kernel/arch/arm/mach-ixp2000/ixdp2800.c

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/*
* arch/arm/mach-ixp2000/ixdp2800.c
*
* IXDP2800 platform support
*
* Original Author: Jeffrey Daly <jeffrey.daly@intel.com>
* Maintainer: Deepak Saxena <dsaxena@plexity.net>
*
* Copyright (C) 2002 Intel Corp.
* Copyright (C) 2003-2004 MontaVista Software, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/bitops.h>
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/system.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>
#include <asm/mach/pci.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#include <asm/mach/flash.h>
#include <asm/mach/arch.h>
/*************************************************************************
* IXDP2800 timer tick
*************************************************************************/
static void __init ixdp2800_timer_init(void)
{
ixp2000_init_time(50000000);
}
static struct sys_timer ixdp2800_timer = {
.init = ixdp2800_timer_init,
.offset = ixp2000_gettimeoffset,
};
/*************************************************************************
* IXDP2800 PCI
*************************************************************************/
static void __init ixdp2800_slave_disable_pci_master(void)
{
*IXP2000_PCI_CMDSTAT &= ~(PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
}
static void __init ixdp2800_master_wait_for_slave(void)
{
volatile u32 *addr;
printk(KERN_INFO "IXDP2800: waiting for slave NPU to configure "
"its BAR sizes\n");
addr = ixp2000_pci_config_addr(0, IXDP2X00_SLAVE_NPU_DEVFN,
PCI_BASE_ADDRESS_1);
do {
*addr = 0xffffffff;
cpu_relax();
} while (*addr != 0xfe000008);
addr = ixp2000_pci_config_addr(0, IXDP2X00_SLAVE_NPU_DEVFN,
PCI_BASE_ADDRESS_2);
do {
*addr = 0xffffffff;
cpu_relax();
} while (*addr != 0xc0000008);
/*
* Configure the slave's SDRAM BAR by hand.
*/
*addr = 0x40000008;
}
static void __init ixdp2800_slave_wait_for_master_enable(void)
{
printk(KERN_INFO "IXDP2800: waiting for master NPU to enable us\n");
while ((*IXP2000_PCI_CMDSTAT & PCI_COMMAND_MASTER) == 0)
cpu_relax();
}
void __init ixdp2800_pci_preinit(void)
{
printk("ixdp2x00_pci_preinit called\n");
*IXP2000_PCI_ADDR_EXT = 0x0001e000;
if (!ixdp2x00_master_npu())
ixdp2800_slave_disable_pci_master();
*IXP2000_PCI_SRAM_BASE_ADDR_MASK = (0x2000000 - 1) & ~0x3ffff;
*IXP2000_PCI_DRAM_BASE_ADDR_MASK = (0x40000000 - 1) & ~0xfffff;
ixp2000_pci_preinit();
if (ixdp2x00_master_npu()) {
/*
* Wait until the slave set its SRAM/SDRAM BAR sizes
* correctly before we proceed to scan and enumerate
* the bus.
*/
ixdp2800_master_wait_for_slave();
/*
* We configure the SDRAM BARs by hand because they
* are 1G and fall outside of the regular allocated
* PCI address space.
*/
*IXP2000_PCI_SDRAM_BAR = 0x00000008;
} else {
/*
* Wait for the master to complete scanning the bus
* and assigning resources before we proceed to scan
* the bus ourselves. Set pci=firmware to honor the
* master's resource assignment.
*/
ixdp2800_slave_wait_for_master_enable();
pcibios_setup("firmware");
}
}
/*
* We assign the SDRAM BARs for the two IXP2800 CPUs by hand, outside
* of the regular PCI window, because there's only 512M of outbound PCI
* memory window on each IXP, while we need 1G for each of the BARs.
*/
static void __devinit ixp2800_pci_fixup(struct pci_dev *dev)
{
if (machine_is_ixdp2800()) {
dev->resource[2].start = 0;
dev->resource[2].end = 0;
dev->resource[2].flags = 0;
}
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IXP2800, ixp2800_pci_fixup);
static int __init ixdp2800_pci_setup(int nr, struct pci_sys_data *sys)
{
sys->mem_offset = 0x00000000;
ixp2000_pci_setup(nr, sys);
return 1;
}
static int __init ixdp2800_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
if (ixdp2x00_master_npu()) {
/*
* Root bus devices. Slave NPU is only one with interrupt.
* Everything else, we just return -1 which is invalid.
*/
if(!dev->bus->self) {
if(dev->devfn == IXDP2X00_SLAVE_NPU_DEVFN )
return IRQ_IXDP2800_INGRESS_NPU;
return -1;
}
/*
* Bridge behind the PMC slot.
*/
if(dev->bus->self->devfn == IXDP2X00_PMC_DEVFN &&
dev->bus->parent->self->devfn == IXDP2X00_P2P_DEVFN &&
!dev->bus->parent->self->bus->parent)
return IRQ_IXDP2800_PMC;
/*
* Device behind the first bridge
*/
if(dev->bus->self->devfn == IXDP2X00_P2P_DEVFN) {
switch(dev->devfn) {
case IXDP2X00_PMC_DEVFN:
return IRQ_IXDP2800_PMC;
case IXDP2800_MASTER_ENET_DEVFN:
return IRQ_IXDP2800_EGRESS_ENET;
case IXDP2800_SWITCH_FABRIC_DEVFN:
return IRQ_IXDP2800_FABRIC;
}
}
return -1;
} else return IRQ_IXP2000_PCIB; /* Slave NIC interrupt */
}
static void __init ixdp2800_master_enable_slave(void)
{
volatile u32 *addr;
printk(KERN_INFO "IXDP2800: enabling slave NPU\n");
addr = (volatile u32 *)ixp2000_pci_config_addr(0,
IXDP2X00_SLAVE_NPU_DEVFN,
PCI_COMMAND);
*addr |= PCI_COMMAND_MASTER;
}
static void __init ixdp2800_master_wait_for_slave_bus_scan(void)
{
volatile u32 *addr;
printk(KERN_INFO "IXDP2800: waiting for slave to finish bus scan\n");
addr = (volatile u32 *)ixp2000_pci_config_addr(0,
IXDP2X00_SLAVE_NPU_DEVFN,
PCI_COMMAND);
while ((*addr & PCI_COMMAND_MEMORY) == 0)
cpu_relax();
}
static void __init ixdp2800_slave_signal_bus_scan_completion(void)
{
printk(KERN_INFO "IXDP2800: bus scan done, signaling master\n");
*IXP2000_PCI_CMDSTAT |= PCI_COMMAND_MEMORY;
}
static void __init ixdp2800_pci_postinit(void)
{
if (!ixdp2x00_master_npu()) {
ixdp2x00_slave_pci_postinit();
ixdp2800_slave_signal_bus_scan_completion();
}
}
struct __initdata hw_pci ixdp2800_pci __initdata = {
.nr_controllers = 1,
.setup = ixdp2800_pci_setup,
.preinit = ixdp2800_pci_preinit,
.postinit = ixdp2800_pci_postinit,
.scan = ixp2000_pci_scan_bus,
.map_irq = ixdp2800_pci_map_irq,
};
int __init ixdp2800_pci_init(void)
{
if (machine_is_ixdp2800()) {
struct pci_dev *dev;
pci_common_init(&ixdp2800_pci);
if (ixdp2x00_master_npu()) {
dev = pci_get_bus_and_slot(1, IXDP2800_SLAVE_ENET_DEVFN);
pci_remove_bus_device(dev);
pci_dev_put(dev);
ixdp2800_master_enable_slave();
ixdp2800_master_wait_for_slave_bus_scan();
} else {
dev = pci_get_bus_and_slot(1, IXDP2800_MASTER_ENET_DEVFN);
pci_remove_bus_device(dev);
pci_dev_put(dev);
}
}
return 0;
}
subsys_initcall(ixdp2800_pci_init);
void __init ixdp2800_init_irq(void)
{
ixdp2x00_init_irq(IXDP2800_CPLD_INT_STAT, IXDP2800_CPLD_INT_MASK, IXDP2800_NR_IRQS);
}
MACHINE_START(IXDP2800, "Intel IXDP2800 Development Platform")
/* Maintainer: MontaVista Software, Inc. */
.phys_io = IXP2000_UART_PHYS_BASE,
.io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
.boot_params = 0x00000100,
.map_io = ixdp2x00_map_io,
.init_irq = ixdp2800_init_irq,
.timer = &ixdp2800_timer,
.init_machine = ixdp2x00_init_machine,
MACHINE_END
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