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 #include <linux/memblock.h>
  21
  22 #include <asm/system.h>
  23 #include <asm/time.h>
  24 #include <asm/machdep.h>
  25 #include <asm/pci-bridge.h>
  26 #include <mm/mmu_decl.h>
  27 #include <asm/prom.h>
  28 #include <asm/udbg.h>
  29 #include <asm/mpic.h>
  30 #include <asm/swiotlb.h>
  31
  32 #include <sysdev/fsl_soc.h>
  33 #include <sysdev/fsl_pci.h>
  34
  35 #include "mpc85xx.h"
  36
  37 void __init mpc8536_ds_pic_init(void)
  38 {
  39         struct mpic *mpic;
  40         struct resource r;
  41         struct device_node *np;
  42
  43         np = of_find_node_by_type(NULL, "open-pic");
  44         if (np == NULL) {
  45                 printk(KERN_ERR "Could not find open-pic node\n");
  46                 return;
  47         }
  48
  49         if (of_address_to_resource(np, 0, &r)) {
  50                 printk(KERN_ERR "Failed to map mpic register space\n");
  51                 of_node_put(np);
  52                 return;
  53         }
  54
  55         mpic = mpic_alloc(np, r.start,
  56                           MPIC_PRIMARY | MPIC_WANTS_RESET |
  57                           MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
  58                         0, 256, " OpenPIC  ");
  59         BUG_ON(mpic == NULL);
  60         of_node_put(np);
  61
  62         mpic_init(mpic);
  63 }
  64
  65 /*
  66  * Setup the architecture
  67  */
  68 static void __init mpc8536_ds_setup_arch(void)
  69 {
  70 #ifdef CONFIG_PCI
  71         struct device_node *np;
  72         struct pci_controller *hose;
  73 #endif
  74         dma_addr_t max = 0xffffffff;
  75
  76         if (ppc_md.progress)
  77                 ppc_md.progress("mpc8536_ds_setup_arch()", 0);
  78
  79 #ifdef CONFIG_PCI
  80         for_each_node_by_type(np, "pci") {
  81                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
  82                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
  83                         struct resource rsrc;
  84                         of_address_to_resource(np, 0, &rsrc);
  85                         if ((rsrc.start & 0xfffff) == 0x8000)
  86                                 fsl_add_bridge(np, 1);
  87                         else
  88                                 fsl_add_bridge(np, 0);
  89
  90                         hose = pci_find_hose_for_OF_device(np);
  91                         max = min(max, hose->dma_window_base_cur +
  92                                         hose->dma_window_size);
  93                 }
  94         }
  95
  96 #endif
  97
  98 #ifdef CONFIG_SWIOTLB
  99         if (memblock_end_of_DRAM() > max) {
 100                 ppc_swiotlb_enable = 1;
 101                 set_pci_dma_ops(&swiotlb_dma_ops);
 102                 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
 103         }
 104 #endif
 105
 106         printk("MPC8536 DS board from Freescale Semiconductor\n");
 107 }
 108
 109 static struct of_device_id __initdata mpc8536_ds_ids[] = {
 110         { .type = "soc", },
 111         { .compatible = "soc", },
 112         { .compatible = "simple-bus", },
 113         { .compatible = "gianfar", },
 114         {},
 115 };
 116
 117 static int __init mpc8536_ds_publish_devices(void)
 118 {
 119         return of_platform_bus_probe(NULL, mpc8536_ds_ids, NULL);
 120 }
 121 machine_device_initcall(mpc8536_ds, mpc8536_ds_publish_devices);
 122
 123 machine_arch_initcall(mpc8536_ds, swiotlb_setup_bus_notifier);
 124
 125 /*
 126  * Called very early, device-tree isn't unflattened
 127  */
 128 static int __init mpc8536_ds_probe(void)
 129 {
 130         unsigned long root = of_get_flat_dt_root();
 131
 132         return of_flat_dt_is_compatible(root, "fsl,mpc8536ds");
 133 }
 134
 135 define_machine(mpc8536_ds) {
 136         .name                   = "MPC8536 DS",
 137         .probe                  = mpc8536_ds_probe,
 138         .setup_arch             = mpc8536_ds_setup_arch,
 139         .init_IRQ               = mpc8536_ds_pic_init,
 140 #ifdef CONFIG_PCI
 141         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 142 #endif
 143         .get_irq                = mpic_get_irq,
 144         .restart                = fsl_rstcr_restart,
 145         .calibrate_decr         = generic_calibrate_decr,
 146         .progress               = udbg_progress,
 147 };