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 = mpic_alloc(NULL, 0,
  40                           MPIC_WANTS_RESET |
  41                           MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS,
  42                         0, 256, " OpenPIC  ");
  43         BUG_ON(mpic == NULL);
  44         mpic_init(mpic);
  45 }
  46
  47 /*
  48  * Setup the architecture
  49  */
  50 static void __init mpc8536_ds_setup_arch(void)
  51 {
  52 #ifdef CONFIG_PCI
  53         struct device_node *np;
  54         struct pci_controller *hose;
  55 #endif
  56         dma_addr_t max = 0xffffffff;
  57
  58         if (ppc_md.progress)
  59                 ppc_md.progress("mpc8536_ds_setup_arch()", 0);
  60
  61 #ifdef CONFIG_PCI
  62         for_each_node_by_type(np, "pci") {
  63                 if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
  64                     of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
  65                         struct resource rsrc;
  66                         of_address_to_resource(np, 0, &rsrc);
  67                         if ((rsrc.start & 0xfffff) == 0x8000)
  68                                 fsl_add_bridge(np, 1);
  69                         else
  70                                 fsl_add_bridge(np, 0);
  71
  72                         hose = pci_find_hose_for_OF_device(np);
  73                         max = min(max, hose->dma_window_base_cur +
  74                                         hose->dma_window_size);
  75                 }
  76         }
  77
  78 #endif
  79
  80 #ifdef CONFIG_SWIOTLB
  81         if (memblock_end_of_DRAM() > max) {
  82                 ppc_swiotlb_enable = 1;
  83                 set_pci_dma_ops(&swiotlb_dma_ops);
  84                 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
  85         }
  86 #endif
  87
  88         printk("MPC8536 DS board from Freescale Semiconductor\n");
  89 }
  90
  91 machine_device_initcall(mpc8536_ds, mpc85xx_common_publish_devices);
  92
  93 machine_arch_initcall(mpc8536_ds, swiotlb_setup_bus_notifier);
  94
  95 /*
  96  * Called very early, device-tree isn't unflattened
  97  */
  98 static int __init mpc8536_ds_probe(void)
  99 {
 100         unsigned long root = of_get_flat_dt_root();
 101
 102         return of_flat_dt_is_compatible(root, "fsl,mpc8536ds");
 103 }
 104
 105 define_machine(mpc8536_ds) {
 106         .name                   = "MPC8536 DS",
 107         .probe                  = mpc8536_ds_probe,
 108         .setup_arch             = mpc8536_ds_setup_arch,
 109         .init_IRQ               = mpc8536_ds_pic_init,
 110 #ifdef CONFIG_PCI
 111         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 112 #endif
 113         .get_irq                = mpic_get_irq,
 114         .restart                = fsl_rstcr_restart,
 115         .calibrate_decr         = generic_calibrate_decr,
 116         .progress               = udbg_progress,
 117 };