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