arch/arm/mach-ixp2000/ixdp2800.c

   1 /*
   2  * arch/arm/mach-ixp2000/ixdp2800.c
   3  *
   4  * IXDP2800 platform support
   5  *
   6  * Original Author: Jeffrey Daly <jeffrey.daly@intel.com>
   7  * Maintainer: Deepak Saxena <dsaxena@plexity.net>
   8  *
   9  * Copyright (C) 2002 Intel Corp.
  10  * Copyright (C) 2003-2004 MontaVista Software, Inc.
  11  *
  12  *  This program is free software; you can redistribute  it and/or modify it
  13  *  under  the terms of  the GNU General  Public License as published by the
  14  *  Free Software Foundation;  either version 2 of the  License, or (at your
  15  *  option) any later version.
  16  */
  17 #include <linux/config.h>
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/mm.h>
  21 #include <linux/sched.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/device.h>
  24 #include <linux/bitops.h>
  25 #include <linux/pci.h>
  26 #include <linux/ioport.h>
  27 #include <linux/slab.h>
  28 #include <linux/delay.h>
  29
  30 #include <asm/io.h>
  31 #include <asm/irq.h>
  32 #include <asm/pgtable.h>
  33 #include <asm/page.h>
  34 #include <asm/system.h>
  35 #include <asm/hardware.h>
  36 #include <asm/mach-types.h>
  37
  38 #include <asm/mach/pci.h>
  39 #include <asm/mach/map.h>
  40 #include <asm/mach/irq.h>
  41 #include <asm/mach/time.h>
  42 #include <asm/mach/flash.h>
  43 #include <asm/mach/arch.h>
  44
  45
  46 void ixdp2400_init_irq(void)
  47 {
  48         ixdp2x00_init_irq(IXDP2800_CPLD_INT_STAT, IXDP2800_CPLD_INT_MASK, IXDP2400_NR_IRQS);
  49 }
  50
  51 /*************************************************************************
  52  * IXDP2800 timer tick
  53  *************************************************************************/
  54
  55 static void __init ixdp2800_timer_init(void)
  56 {
  57         ixp2000_init_time(50000000);
  58 }
  59
  60 static struct sys_timer ixdp2800_timer = {
  61         .init           = ixdp2800_timer_init,
  62         .offset         = ixp2000_gettimeoffset,
  63 };
  64
  65 /*************************************************************************
  66  * IXDP2800 PCI
  67  *************************************************************************/
  68 void __init ixdp2800_pci_preinit(void)
  69 {
  70         printk("ixdp2x00_pci_preinit called\n");
  71
  72         *IXP2000_PCI_ADDR_EXT =  0x0000e000;
  73
  74         *IXP2000_PCI_DRAM_BASE_ADDR_MASK = (0x40000000 - 1) & ~0xfffff;
  75         *IXP2000_PCI_SRAM_BASE_ADDR_MASK = (0x2000000 - 1) & ~0x3ffff;
  76
  77         ixp2000_pci_preinit();
  78 }
  79
  80 int ixdp2800_pci_setup(int nr, struct pci_sys_data *sys)
  81 {
  82         sys->mem_offset = 0x00000000;
  83
  84         ixp2000_pci_setup(nr, sys);
  85
  86         return 1;
  87 }
  88
  89 static int __init ixdp2800_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  90 {
  91         if (ixdp2x00_master_npu()) {
  92
  93                 /*
  94                  * Root bus devices.  Slave NPU is only one with interrupt.
  95                  * Everything else, we just return -1 which is invalid.
  96                  */
  97                 if(!dev->bus->self) {
  98                         if(dev->devfn == IXDP2X00_SLAVE_NPU_DEVFN )
  99                                 return IRQ_IXDP2800_INGRESS_NPU;
 100
 101                         return -1;
 102                 }
 103
 104                 /*
 105                  * Bridge behind the PMC slot.
 106                  */
 107                 if(dev->bus->self->devfn == IXDP2X00_PMC_DEVFN &&
 108                         dev->bus->parent->self->devfn == IXDP2X00_P2P_DEVFN &&
 109                         !dev->bus->parent->self->bus->parent)
 110                                   return IRQ_IXDP2800_PMC;
 111
 112                 /*
 113                  * Device behind the first bridge
 114                  */
 115                 if(dev->bus->self->devfn == IXDP2X00_P2P_DEVFN) {
 116                         switch(dev->devfn) {
 117                                 case IXDP2X00_PMC_DEVFN:
 118                                         return IRQ_IXDP2800_PMC;
 119
 120                                 case IXDP2800_MASTER_ENET_DEVFN:
 121                                         return IRQ_IXDP2800_EGRESS_ENET;
 122
 123                                 case IXDP2800_SWITCH_FABRIC_DEVFN:
 124                                         return IRQ_IXDP2800_FABRIC;
 125                         }
 126                 }
 127
 128                 return -1;
 129         } else return IRQ_IXP2000_PCIB; /* Slave NIC interrupt */
 130 }
 131
 132 static void ixdp2800_pci_postinit(void)
 133 {
 134         struct pci_dev *dev;
 135
 136         if (ixdp2x00_master_npu()) {
 137                 dev = pci_find_slot(1, IXDP2800_SLAVE_ENET_DEVFN);
 138                 pci_remove_bus_device(dev);
 139         } else {
 140                 dev = pci_find_slot(1, IXDP2800_MASTER_ENET_DEVFN);
 141                 pci_remove_bus_device(dev);
 142
 143                 ixdp2x00_slave_pci_postinit();
 144         }
 145 }
 146
 147 struct hw_pci ixdp2800_pci __initdata = {
 148         .nr_controllers = 1,
 149         .setup          = ixdp2800_pci_setup,
 150         .preinit        = ixdp2800_pci_preinit,
 151         .postinit       = ixdp2800_pci_postinit,
 152         .scan           = ixp2000_pci_scan_bus,
 153         .map_irq        = ixdp2800_pci_map_irq,
 154 };
 155
 156 int __init ixdp2800_pci_init(void)
 157 {
 158         if (machine_is_ixdp2800())
 159                 pci_common_init(&ixdp2800_pci);
 160
 161         return 0;
 162 }
 163
 164 subsys_initcall(ixdp2800_pci_init);
 165
 166 void ixdp2800_init_irq(void)
 167 {
 168         ixdp2x00_init_irq(IXDP2800_CPLD_INT_STAT, IXDP2800_CPLD_INT_MASK, IXDP2800_NR_IRQS);
 169 }
 170
 171 MACHINE_START(IXDP2800, "Intel IXDP2800 Development Platform")
 172         MAINTAINER("MontaVista Software, Inc.")
 173         BOOT_MEM(0x00000000, IXP2000_UART_PHYS_BASE, IXP2000_UART_VIRT_BASE)
 174         BOOT_PARAMS(0x00000100)
 175         MAPIO(ixdp2x00_map_io)
 176         INITIRQ(ixdp2800_init_irq)
 177         .timer          = &ixdp2800_timer,
 178         INIT_MACHINE(ixdp2x00_init_machine)
 179 MACHINE_END
 180