release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/platforms/83xx/sbc834x.c

   1 /*
   2  * arch/powerpc/platforms/83xx/sbc834x.c
   3  *
   4  * Wind River SBC834x board specific routines
   5  *
   6  * By Paul Gortmaker (see MAINTAINERS for contact information)
   7  *
   8  * Based largely on the mpc834x_mds.c support by Kumar Gala.
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  */
  15
  16 #include <linux/stddef.h>
  17 #include <linux/kernel.h>
  18 #include <linux/init.h>
  19 #include <linux/errno.h>
  20 #include <linux/reboot.h>
  21 #include <linux/pci.h>
  22 #include <linux/kdev_t.h>
  23 #include <linux/major.h>
  24 #include <linux/console.h>
  25 #include <linux/delay.h>
  26 #include <linux/seq_file.h>
  27 #include <linux/root_dev.h>
  28 #include <linux/of_platform.h>
  29
  30 #include <asm/system.h>
  31 #include <asm/atomic.h>
  32 #include <asm/time.h>
  33 #include <asm/io.h>
  34 #include <asm/machdep.h>
  35 #include <asm/ipic.h>
  36 #include <asm/irq.h>
  37 #include <asm/prom.h>
  38 #include <asm/udbg.h>
  39 #include <sysdev/fsl_soc.h>
  40 #include <sysdev/fsl_pci.h>
  41
  42 #include "mpc83xx.h"
  43
  44 /* ************************************************************************
  45  *
  46  * Setup the architecture
  47  *
  48  */
  49 static void __init sbc834x_setup_arch(void)
  50 {
  51 #ifdef CONFIG_PCI
  52         struct device_node *np;
  53 #endif
  54
  55         if (ppc_md.progress)
  56                 ppc_md.progress("sbc834x_setup_arch()", 0);
  57
  58 #ifdef CONFIG_PCI
  59         for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
  60                 mpc83xx_add_bridge(np);
  61 #endif
  62
  63 }
  64
  65 static void __init sbc834x_init_IRQ(void)
  66 {
  67         struct device_node *np;
  68
  69         np = of_find_node_by_type(NULL, "ipic");
  70         if (!np)
  71                 return;
  72
  73         ipic_init(np, 0);
  74
  75         /* Initialize the default interrupt mapping priorities,
  76          * in case the boot rom changed something on us.
  77          */
  78         ipic_set_default_priority();
  79
  80         of_node_put(np);
  81 }
  82
  83 static struct __initdata of_device_id sbc834x_ids[] = {
  84         { .type = "soc", },
  85         { .compatible = "soc", },
  86         { .compatible = "simple-bus", },
  87         { .compatible = "gianfar", },
  88         {},
  89 };
  90
  91 static int __init sbc834x_declare_of_platform_devices(void)
  92 {
  93         of_platform_bus_probe(NULL, sbc834x_ids, NULL);
  94         return 0;
  95 }
  96 machine_device_initcall(sbc834x, sbc834x_declare_of_platform_devices);
  97
  98 /*
  99  * Called very early, MMU is off, device-tree isn't unflattened
 100  */
 101 static int __init sbc834x_probe(void)
 102 {
 103         unsigned long root = of_get_flat_dt_root();
 104
 105         return of_flat_dt_is_compatible(root, "SBC834x");
 106 }
 107
 108 define_machine(sbc834x) {
 109         .name                   = "SBC834x",
 110         .probe                  = sbc834x_probe,
 111         .setup_arch             = sbc834x_setup_arch,
 112         .init_IRQ               = sbc834x_init_IRQ,
 113         .get_irq                = ipic_get_irq,
 114         .restart                = mpc83xx_restart,
 115         .time_init              = mpc83xx_time_init,
 116         .calibrate_decr         = generic_calibrate_decr,
 117         .progress               = udbg_progress,
 118 };