arch/powerpc/platforms/83xx/mpc834x_itx.c

   1 /*
   2  * arch/powerpc/platforms/83xx/mpc834x_itx.c
   3  *
   4  * MPC834x ITX board specific routines
   5  *
   6  * Maintainer: Kumar Gala <galak@kernel.crashing.org>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/config.h>
  15 #include <linux/stddef.h>
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/errno.h>
  19 #include <linux/reboot.h>
  20 #include <linux/pci.h>
  21 #include <linux/kdev_t.h>
  22 #include <linux/major.h>
  23 #include <linux/console.h>
  24 #include <linux/delay.h>
  25 #include <linux/seq_file.h>
  26 #include <linux/root_dev.h>
  27
  28 #include <asm/system.h>
  29 #include <asm/atomic.h>
  30 #include <asm/time.h>
  31 #include <asm/io.h>
  32 #include <asm/machdep.h>
  33 #include <asm/ipic.h>
  34 #include <asm/bootinfo.h>
  35 #include <asm/irq.h>
  36 #include <asm/prom.h>
  37 #include <asm/udbg.h>
  38 #include <sysdev/fsl_soc.h>
  39
  40 #include "mpc83xx.h"
  41
  42 #include <platforms/83xx/mpc834x_sys.h>
  43
  44 #ifndef CONFIG_PCI
  45 unsigned long isa_io_base = 0;
  46 unsigned long isa_mem_base = 0;
  47 #endif
  48
  49 /* ************************************************************************
  50  *
  51  * Setup the architecture
  52  *
  53  */
  54 static void __init mpc834x_itx_setup_arch(void)
  55 {
  56         struct device_node *np;
  57
  58         if (ppc_md.progress)
  59                 ppc_md.progress("mpc834x_itx_setup_arch()", 0);
  60
  61         np = of_find_node_by_type(NULL, "cpu");
  62         if (np != 0) {
  63                 const unsigned int *fp =
  64                         get_property(np, "clock-frequency", NULL);
  65                 if (fp != 0)
  66                         loops_per_jiffy = *fp / HZ;
  67                 else
  68                         loops_per_jiffy = 50000000 / HZ;
  69                 of_node_put(np);
  70         }
  71 #ifdef CONFIG_PCI
  72         for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
  73                 add_bridge(np);
  74
  75         ppc_md.pci_exclude_device = mpc83xx_exclude_device;
  76 #endif
  77
  78 #ifdef  CONFIG_ROOT_NFS
  79         ROOT_DEV = Root_NFS;
  80 #else
  81         ROOT_DEV = Root_HDA1;
  82 #endif
  83 }
  84
  85 void __init mpc834x_itx_init_IRQ(void)
  86 {
  87         struct device_node *np;
  88
  89         np = of_find_node_by_type(NULL, "ipic");
  90         if (!np)
  91                 return;
  92
  93         ipic_init(np, 0);
  94
  95         /* Initialize the default interrupt mapping priorities,
  96          * in case the boot rom changed something on us.
  97          */
  98         ipic_set_default_priority();
  99 }
 100
 101 /*
 102  * Called very early, MMU is off, device-tree isn't unflattened
 103  */
 104 static int __init mpc834x_itx_probe(void)
 105 {
 106         /* We always match for now, eventually we should look at the flat
 107            dev tree to ensure this is the board we are suppose to run on
 108         */
 109         return 1;
 110 }
 111
 112 define_machine(mpc834x_itx) {
 113         .name                   = "MPC834x ITX",
 114         .probe                  = mpc834x_itx_probe,
 115         .setup_arch             = mpc834x_itx_setup_arch,
 116         .init_IRQ               = mpc834x_itx_init_IRQ,
 117         .get_irq                = ipic_get_irq,
 118         .restart                = mpc83xx_restart,
 119         .time_init              = mpc83xx_time_init,
 120         .calibrate_decr         = generic_calibrate_decr,
 121         .progress               = udbg_progress,
 122 #ifdef CONFIG_PCI
 123         .pcibios_fixup          = mpc83xx_pcibios_fixup,
 124 #endif
 125 };