mirror of https://gitee.com/openkylin/linux.git
267 lines
6.8 KiB
C
267 lines
6.8 KiB
C
/*
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* arch/arm/mach-ixp2000/enp2611.c
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*
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* Radisys ENP-2611 support.
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*
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* Created 2004 by Lennert Buytenhek from the ixdp2x01 code. The
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* original version carries the following notices:
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*
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* Original Author: Andrzej Mialkowski <andrzej.mialkowski@intel.com>
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* Maintainer: Deepak Saxena <dsaxena@plexity.net>
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*
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* Copyright (C) 2002-2003 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/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/bitops.h>
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#include <linux/pci.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/serial.h>
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#include <linux/tty.h>
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#include <linux/serial_core.h>
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#include <linux/platform_device.h>
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#include <linux/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 <mach/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/arch.h>
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#include <asm/mach/flash.h>
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/*************************************************************************
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* ENP-2611 timer tick configuration
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*************************************************************************/
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static void __init enp2611_timer_init(void)
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{
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ixp2000_init_time(50 * 1000 * 1000);
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}
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static struct sys_timer enp2611_timer = {
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.init = enp2611_timer_init,
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.offset = ixp2000_gettimeoffset,
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};
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/*************************************************************************
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* ENP-2611 I/O
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*************************************************************************/
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static struct map_desc enp2611_io_desc[] __initdata = {
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{
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.virtual = ENP2611_CALEB_VIRT_BASE,
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.pfn = __phys_to_pfn(ENP2611_CALEB_PHYS_BASE),
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.length = ENP2611_CALEB_SIZE,
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.type = MT_DEVICE,
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}, {
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.virtual = ENP2611_PM3386_0_VIRT_BASE,
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.pfn = __phys_to_pfn(ENP2611_PM3386_0_PHYS_BASE),
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.length = ENP2611_PM3386_0_SIZE,
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.type = MT_DEVICE,
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}, {
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.virtual = ENP2611_PM3386_1_VIRT_BASE,
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.pfn = __phys_to_pfn(ENP2611_PM3386_1_PHYS_BASE),
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.length = ENP2611_PM3386_1_SIZE,
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.type = MT_DEVICE,
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}
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};
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void __init enp2611_map_io(void)
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{
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ixp2000_map_io();
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iotable_init(enp2611_io_desc, ARRAY_SIZE(enp2611_io_desc));
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}
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/*************************************************************************
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* ENP-2611 PCI
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*************************************************************************/
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static int enp2611_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 void __init enp2611_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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static inline int enp2611_pci_valid_device(struct pci_bus *bus,
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unsigned int devfn)
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{
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/* The 82559 ethernet controller appears at both PCI:1:0:0 and
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* PCI:1:2:0, so let's pretend the second one isn't there.
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*/
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if (bus->number == 0x01 && devfn == 0x10)
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return 0;
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return 1;
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}
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static int enp2611_pci_read_config(struct pci_bus *bus, unsigned int devfn,
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int where, int size, u32 *value)
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{
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if (enp2611_pci_valid_device(bus, devfn))
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return ixp2000_pci_read_config(bus, devfn, where, size, value);
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return PCIBIOS_DEVICE_NOT_FOUND;
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}
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static int enp2611_pci_write_config(struct pci_bus *bus, unsigned int devfn,
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int where, int size, u32 value)
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{
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if (enp2611_pci_valid_device(bus, devfn))
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return ixp2000_pci_write_config(bus, devfn, where, size, value);
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return PCIBIOS_DEVICE_NOT_FOUND;
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}
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static struct pci_ops enp2611_pci_ops = {
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.read = enp2611_pci_read_config,
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.write = enp2611_pci_write_config
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};
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static struct pci_bus * __init enp2611_pci_scan_bus(int nr,
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struct pci_sys_data *sys)
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{
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return pci_scan_root_bus(NULL, sys->busnr, &enp2611_pci_ops, sys,
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&sys->resources);
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}
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static int __init enp2611_pci_map_irq(const struct pci_dev *dev, u8 slot,
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u8 pin)
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{
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int irq;
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if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 0) {
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/* IXP2400. */
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irq = IRQ_IXP2000_PCIA;
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} else if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 1) {
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/* 21555 non-transparent bridge. */
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irq = IRQ_IXP2000_PCIB;
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} else if (dev->bus->number == 0 && PCI_SLOT(dev->devfn) == 4) {
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/* PCI2050B transparent bridge. */
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irq = -1;
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} else if (dev->bus->number == 1 && PCI_SLOT(dev->devfn) == 0) {
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/* 82559 ethernet. */
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irq = IRQ_IXP2000_PCIA;
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} else if (dev->bus->number == 1 && PCI_SLOT(dev->devfn) == 1) {
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/* SPI-3 option board. */
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irq = IRQ_IXP2000_PCIB;
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} else {
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printk(KERN_ERR "enp2611_pci_map_irq() called for unknown "
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"device PCI:%d:%d:%d\n", dev->bus->number,
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PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
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irq = -1;
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}
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return irq;
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}
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struct hw_pci enp2611_pci __initdata = {
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.nr_controllers = 1,
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.setup = enp2611_pci_setup,
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.preinit = enp2611_pci_preinit,
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.scan = enp2611_pci_scan_bus,
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.map_irq = enp2611_pci_map_irq,
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};
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int __init enp2611_pci_init(void)
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{
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if (machine_is_enp2611())
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pci_common_init(&enp2611_pci);
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return 0;
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}
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subsys_initcall(enp2611_pci_init);
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/*************************************************************************
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* ENP-2611 Machine Initialization
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*************************************************************************/
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static struct flash_platform_data enp2611_flash_platform_data = {
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.map_name = "cfi_probe",
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.width = 1,
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};
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static struct ixp2000_flash_data enp2611_flash_data = {
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.platform_data = &enp2611_flash_platform_data,
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.nr_banks = 1
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};
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static struct resource enp2611_flash_resource = {
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.start = 0xc4000000,
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.end = 0xc4000000 + 0x00ffffff,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device enp2611_flash = {
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.name = "IXP2000-Flash",
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.id = 0,
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.dev = {
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.platform_data = &enp2611_flash_data,
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},
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.num_resources = 1,
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.resource = &enp2611_flash_resource,
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};
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static struct ixp2000_i2c_pins enp2611_i2c_gpio_pins = {
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.sda_pin = ENP2611_GPIO_SDA,
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.scl_pin = ENP2611_GPIO_SCL,
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};
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static struct platform_device enp2611_i2c_controller = {
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.name = "IXP2000-I2C",
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.id = 0,
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.dev = {
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.platform_data = &enp2611_i2c_gpio_pins
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},
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.num_resources = 0
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};
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static struct platform_device *enp2611_devices[] __initdata = {
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&enp2611_flash,
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&enp2611_i2c_controller
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};
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static void __init enp2611_init_machine(void)
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{
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platform_add_devices(enp2611_devices, ARRAY_SIZE(enp2611_devices));
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ixp2000_uart_init();
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}
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MACHINE_START(ENP2611, "Radisys ENP-2611 PCI network processor board")
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/* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
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.atag_offset = 0x100,
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.map_io = enp2611_map_io,
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.init_irq = ixp2000_init_irq,
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.timer = &enp2611_timer,
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.init_machine = enp2611_init_machine,
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.restart = ixp2000_restart,
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MACHINE_END
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