arch/arm/mach-ixp2000/ixdp2400.c

   1 /*
   2  * arch/arm/mach-ixp2000/ixdp2400.c
   3  *
   4  * IXDP2400 platform support
   5  *
   6  * Original Author: Naeem Afzal <naeem.m.afzal@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/interrupt.h>
  27 #include <linux/mm.h>
  28 #include <linux/init.h>
  29 #include <linux/ioport.h>
  30 #include <linux/slab.h>
  31 #include <linux/delay.h>
  32
  33 #include <asm/io.h>
  34 #include <asm/irq.h>
  35 #include <asm/pgtable.h>
  36 #include <asm/page.h>
  37 #include <asm/system.h>
  38 #include <asm/hardware.h>
  39 #include <asm/mach-types.h>
  40
  41 #include <asm/mach/pci.h>
  42 #include <asm/mach/map.h>
  43 #include <asm/mach/irq.h>
  44 #include <asm/mach/time.h>
  45 #include <asm/mach/flash.h>
  46 #include <asm/mach/arch.h>
  47
  48 /*************************************************************************
  49  * IXDP2400 timer tick
  50  *************************************************************************/
  51 static void __init ixdp2400_init_time(void)
  52 {
  53         int numerator, denominator;
  54         int denom_array[] = {2, 4, 8, 16, 1, 2, 4, 8};
  55
  56         numerator = (*(IXDP2400_CPLD_SYS_CLK_M) & 0xFF) *2;
  57         denominator = denom_array[(*(IXDP2400_CPLD_SYS_CLK_N) & 0x7)];
  58
  59         ixp2000_init_time(((3125000 * numerator) / (denominator)) / 2);
  60 }
  61
  62 /*************************************************************************
  63  * IXDP2400 PCI
  64  *************************************************************************/
  65 void __init ixdp2400_pci_preinit(void)
  66 {
  67         ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
  68         ixp2000_pci_preinit();
  69 }
  70
  71 int ixdp2400_pci_setup(int nr, struct pci_sys_data *sys)
  72 {
  73         sys->mem_offset = 0xe0000000;
  74
  75         ixp2000_pci_setup(nr, sys);
  76
  77         return 1;
  78 }
  79
  80 static int __init ixdp2400_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  81 {
  82         if (ixdp2x00_master_npu()) {
  83
  84                 /*
  85                  * Root bus devices.  Slave NPU is only one with interrupt.
  86                  * Everything else, we just return -1 b/c nothing else
  87                  * on the root bus has interrupts.
  88                  */
  89                 if(!dev->bus->self) {
  90                         if(dev->devfn == IXDP2X00_SLAVE_NPU_DEVFN )
  91                                 return IRQ_IXDP2400_INGRESS_NPU;
  92
  93                         return -1;
  94                 }
  95
  96                 /*
  97                  * Bridge behind the PMC slot.
  98                  * NOTE: Only INTA from the PMC slot is routed. VERY BAD.
  99                  */
 100                 if(dev->bus->self->devfn == IXDP2X00_PMC_DEVFN &&
 101                         dev->bus->parent->self->devfn == IXDP2X00_P2P_DEVFN &&
 102                         !dev->bus->parent->self->bus->parent)
 103                                   return IRQ_IXDP2400_PMC;
 104
 105                 /*
 106                  * Device behind the first bridge
 107                  */
 108                 if(dev->bus->self->devfn == IXDP2X00_P2P_DEVFN) {
 109                         switch(dev->devfn) {
 110                                 case IXDP2400_MASTER_ENET_DEVFN:
 111                                         return IRQ_IXDP2400_ENET;
 112
 113                                 case IXDP2400_MEDIA_DEVFN:
 114                                         return IRQ_IXDP2400_MEDIA_PCI;
 115
 116                                 case IXDP2400_SWITCH_FABRIC_DEVFN:
 117                                         return IRQ_IXDP2400_SF_PCI;
 118
 119                                 case IXDP2X00_PMC_DEVFN:
 120                                         return IRQ_IXDP2400_PMC;
 121                         }
 122                 }
 123
 124                 return -1;
 125         } else return IRQ_IXP2000_PCIB; /* Slave NIC interrupt */
 126 }
 127
 128
 129 static void ixdp2400_pci_postinit(void)
 130 {
 131         struct pci_dev *dev;
 132
 133         if (ixdp2x00_master_npu()) {
 134                 dev = pci_find_slot(1, IXDP2400_SLAVE_ENET_DEVFN);
 135                 pci_remove_bus_device(dev);
 136         } else {
 137                 dev = pci_find_slot(1, IXDP2400_MASTER_ENET_DEVFN);
 138                 pci_remove_bus_device(dev);
 139
 140                 ixdp2x00_slave_pci_postinit();
 141         }
 142 }
 143
 144 static struct hw_pci ixdp2400_pci __initdata = {
 145         .nr_controllers = 1,
 146         .setup          = ixdp2400_pci_setup,
 147         .preinit        = ixdp2400_pci_preinit,
 148         .postinit       = ixdp2400_pci_postinit,
 149         .scan           = ixp2000_pci_scan_bus,
 150         .map_irq        = ixdp2400_pci_map_irq,
 151 };
 152
 153 int __init ixdp2400_pci_init(void)
 154 {
 155         if (machine_is_ixdp2400())
 156                 pci_common_init(&ixdp2400_pci);
 157
 158         return 0;
 159 }
 160
 161 subsys_initcall(ixdp2400_pci_init);
 162
 163 void ixdp2400_init_irq(void)
 164 {
 165         ixdp2x00_init_irq(IXDP2400_CPLD_INT_STAT, IXDP2400_CPLD_INT_MASK, IXDP2400_NR_IRQS);
 166 }
 167
 168 MACHINE_START(IXDP2400, "Intel IXDP2400 Development Platform")
 169         MAINTAINER("MontaVista Software, Inc.")
 170         BOOT_MEM(0x00000000, IXP2000_UART_PHYS_BASE, IXP2000_UART_VIRT_BASE)
 171         BOOT_PARAMS(0x00000100)
 172         MAPIO(ixdp2x00_map_io)
 173         INITIRQ(ixdp2400_init_irq)
 174         INITTIME(ixdp2400_init_time)
 175         INIT_MACHINE(ixdp2x00_init_machine)
 176 MACHINE_END
 177