release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/platforms/85xx/corenet_ds.c

   1 /*
   2  * Corenet based SoC DS Setup
   3  *
   4  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
   5  *
   6  * Copyright 2009 Freescale Semiconductor Inc.
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/pci.h>
  16 #include <linux/kdev_t.h>
  17 #include <linux/delay.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/memblock.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 <linux/of_platform.h>
  31 #include <sysdev/fsl_soc.h>
  32 #include <sysdev/fsl_pci.h>
  33
  34 void __init corenet_ds_pic_init(void)
  35 {
  36         struct mpic *mpic;
  37         struct resource r;
  38         struct device_node *np = NULL;
  39         unsigned int flags = MPIC_PRIMARY | MPIC_BIG_ENDIAN |
  40                                 MPIC_BROKEN_FRR_NIRQS | MPIC_SINGLE_DEST_CPU;
  41
  42         np = of_find_node_by_type(np, "open-pic");
  43
  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         if (ppc_md.get_irq == mpic_get_coreint_irq)
  56                 flags |= MPIC_ENABLE_COREINT;
  57
  58         mpic = mpic_alloc(np, r.start, flags, 0, 256, " OpenPIC  ");
  59         BUG_ON(mpic == NULL);
  60
  61         mpic_init(mpic);
  62 }
  63
  64 #ifdef CONFIG_PCI
  65 static int primary_phb_addr;
  66 #endif
  67
  68 /*
  69  * Setup the architecture
  70  */
  71 #ifdef CONFIG_SMP
  72 void __init mpc85xx_smp_init(void);
  73 #endif
  74
  75 void __init corenet_ds_setup_arch(void)
  76 {
  77 #ifdef CONFIG_PCI
  78         struct device_node *np;
  79         struct pci_controller *hose;
  80 #endif
  81         dma_addr_t max = 0xffffffff;
  82
  83 #ifdef CONFIG_SMP
  84         mpc85xx_smp_init();
  85 #endif
  86
  87 #ifdef CONFIG_PCI
  88         for_each_compatible_node(np, "pci", "fsl,p4080-pcie") {
  89                 struct resource rsrc;
  90                 of_address_to_resource(np, 0, &rsrc);
  91                 if ((rsrc.start & 0xfffff) == primary_phb_addr)
  92                         fsl_add_bridge(np, 1);
  93                 else
  94                         fsl_add_bridge(np, 0);
  95
  96                 hose = pci_find_hose_for_OF_device(np);
  97                 max = min(max, hose->dma_window_base_cur +
  98                                 hose->dma_window_size);
  99         }
 100 #endif
 101
 102 #ifdef CONFIG_SWIOTLB
 103         if (memblock_end_of_DRAM() > max) {
 104                 ppc_swiotlb_enable = 1;
 105                 set_pci_dma_ops(&swiotlb_dma_ops);
 106                 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
 107         }
 108 #endif
 109         pr_info("%s board from Freescale Semiconductor\n", ppc_md.name);
 110 }
 111
 112 static const struct of_device_id of_device_ids[] __devinitconst = {
 113         {
 114                 .compatible     = "simple-bus"
 115         },
 116         {
 117                 .compatible     = "fsl,rapidio-delta",
 118         },
 119         {}
 120 };
 121
 122 int __init corenet_ds_publish_devices(void)
 123 {
 124         return of_platform_bus_probe(NULL, of_device_ids, NULL);
 125 }