arch/powerpc/platforms/85xx/mpc8536_ds.c

   1 /*
   2  * MPC8536 DS Board Setup
   3  *
   4  * Copyright 2008 Freescale Semiconductor, Inc.
   5  *
   6  * This program is free software; you can redistribute  it and/or modify it
   7  * under  the terms of  the GNU General  Public License as published by the
   8  * Free Software Foundation;  either version 2 of the  License, or (at your
   9  * option) any later version.
  10  */
  11
  12 #include <linux/stddef.h>
  13 #include <linux/kernel.h>
  14 #include <linux/pci.h>
  15 #include <linux/kdev_t.h>
  16 #include <linux/delay.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/of_platform.h>
  20
  21 #include <asm/system.h>
  22 #include <asm/time.h>
  23 #include <asm/machdep.h>
  24 #include <asm/pci-bridge.h>
  25 #include <mm/mmu_decl.h>
  26 #include <asm/prom.h>
  27 #include <asm/udbg.h>
  28 #include <asm/mpic.h>
  29
  30 #include <sysdev/fsl_soc.h>
  31 #include <sysdev/fsl_pci.h>
  32
  33 void __init mpc8536_ds_pic_init(void)
  34 {
  35         struct mpic *mpic;
  36         struct resource r;
  37         struct device_node *np;
  38
  39         np = of_find_node_by_type(NULL, "open-pic");
  40         if (np == NULL) {
  41                 printk(KERN_ERR "Could not find open-pic node\n");
  42                 return;
  43         }
  44
  45         if (of_address_to_resource(np, 0, &r)) {
  46                 printk(KERN_ERR "Failed to map mpic register space\n");
  47                 of_node_put(np);
  48                 return;
  49         }
  50
  51         mpic = mpic_alloc(np, r.start,
  52                           MPIC_PRIMARY | MPIC_WANTS_RESET |
  53                           MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
  54                         0, 256, " OpenPIC  ");
  55         BUG_ON(mpic == NULL);
  56         of_node_put(np);
  57
  58         mpic_init(mpic);
  59 }
  60
  61 /*
  62  * Setup the architecture
  63  */
  64 static void __init mpc8536_ds_setup_arch(void)
  65 {
  66 #ifdef CONFIG_PCI
  67         struct device_node *np;
  68 #endif
  69
  70         if (ppc_md.progress)
  71                 ppc_md.progress("mpc8536_ds_setup_arch()", 0);
  72
  73 #ifdef CONFIG_PCI
  74         for_each_node_by_type(np, "pci") {
  75                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
  76                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
  77                         struct resource rsrc;
  78                         of_address_to_resource(np, 0, &rsrc);
  79                         if ((rsrc.start & 0xfffff) == 0x8000)
  80                                 fsl_add_bridge(np, 1);
  81                         else
  82                                 fsl_add_bridge(np, 0);
  83                 }
  84         }
  85
  86 #endif
  87
  88         printk("MPC8536 DS board from Freescale Semiconductor\n");
  89 }
  90
  91 static struct of_device_id __initdata mpc8536_ds_ids[] = {
  92         { .type = "soc", },
  93         { .compatible = "soc", },
  94         { .compatible = "simple-bus", },
  95         { .compatible = "gianfar", },
  96         {},
  97 };
  98
  99 static int __init mpc8536_ds_publish_devices(void)
 100 {
 101         return of_platform_bus_probe(NULL, mpc8536_ds_ids, NULL);
 102 }
 103 machine_device_initcall(mpc8536_ds, mpc8536_ds_publish_devices);
 104
 105 /*
 106  * Called very early, device-tree isn't unflattened
 107  */
 108 static int __init mpc8536_ds_probe(void)
 109 {
 110         unsigned long root = of_get_flat_dt_root();
 111
 112         return of_flat_dt_is_compatible(root, "fsl,mpc8536ds");
 113 }
 114
 115 define_machine(mpc8536_ds) {
 116         .name                   = "MPC8536 DS",
 117         .probe                  = mpc8536_ds_probe,
 118         .setup_arch             = mpc8536_ds_setup_arch,
 119         .init_IRQ               = mpc8536_ds_pic_init,
 120 #ifdef CONFIG_PCI
 121         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 122 #endif
 123         .get_irq                = mpic_get_irq,
 124         .restart                = fsl_rstcr_restart,
 125         .calibrate_decr         = generic_calibrate_decr,
 126         .progress               = udbg_progress,
 127 };