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 2009-2011 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 <asm/ppc-pci.h>
  26 #include <mm/mmu_decl.h>
  27 #include <asm/prom.h>
  28 #include <asm/udbg.h>
  29 #include <asm/mpic.h>
  30
  31 #include <linux/of_platform.h>
  32 #include <sysdev/fsl_soc.h>
  33 #include <sysdev/fsl_pci.h>
  34
  35 void __init corenet_ds_pic_init(void)
  36 {
  37         struct mpic *mpic;
  38         struct resource r;
  39         struct device_node *np = NULL;
  40         unsigned int flags = MPIC_PRIMARY | MPIC_BIG_ENDIAN |
  41                                 MPIC_BROKEN_FRR_NIRQS | MPIC_SINGLE_DEST_CPU;
  42
  43         np = of_find_node_by_type(np, "open-pic");
  44
  45         if (np == NULL) {
  46                 printk(KERN_ERR "Could not find open-pic node\n");
  47                 return;
  48         }
  49
  50         if (of_address_to_resource(np, 0, &r)) {
  51                 printk(KERN_ERR "Failed to map mpic register space\n");
  52                 of_node_put(np);
  53                 return;
  54         }
  55
  56         if (ppc_md.get_irq == mpic_get_coreint_irq)
  57                 flags |= MPIC_ENABLE_COREINT;
  58
  59         mpic = mpic_alloc(np, r.start, flags, 0, 256, " OpenPIC  ");
  60         BUG_ON(mpic == NULL);
  61
  62         mpic_init(mpic);
  63 }
  64
  65 /*
  66  * Setup the architecture
  67  */
  68 #ifdef CONFIG_SMP
  69 void __init mpc85xx_smp_init(void);
  70 #endif
  71
  72 void __init corenet_ds_setup_arch(void)
  73 {
  74 #ifdef CONFIG_PCI
  75         struct device_node *np;
  76         struct pci_controller *hose;
  77 #endif
  78         dma_addr_t max = 0xffffffff;
  79
  80 #ifdef CONFIG_SMP
  81         mpc85xx_smp_init();
  82 #endif
  83
  84 #ifdef CONFIG_PCI
  85         for_each_node_by_type(np, "pci") {
  86                 if (of_device_is_compatible(np, "fsl,p4080-pcie") ||
  87                     of_device_is_compatible(np, "fsl,qoriq-pcie-v2.2")) {
  88                         fsl_add_bridge(np, 0);
  89                         hose = pci_find_hose_for_OF_device(np);
  90                         max = min(max, hose->dma_window_base_cur +
  91                                         hose->dma_window_size);
  92                 }
  93         }
  94
  95 #ifdef CONFIG_PPC64
  96         pci_devs_phb_init();
  97 #endif
  98 #endif
  99
 100 #ifdef CONFIG_SWIOTLB
 101         if (memblock_end_of_DRAM() > max) {
 102                 ppc_swiotlb_enable = 1;
 103                 set_pci_dma_ops(&swiotlb_dma_ops);
 104                 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
 105         }
 106 #endif
 107         pr_info("%s board from Freescale Semiconductor\n", ppc_md.name);
 108 }
 109
 110 static const struct of_device_id of_device_ids[] __devinitconst = {
 111         {
 112                 .compatible     = "simple-bus"
 113         },
 114         {
 115                 .compatible     = "fsl,rapidio-delta",
 116         },
 117         {
 118                 .compatible     = "fsl,p4080-pcie",
 119         },
 120         {
 121                 .compatible     = "fsl,qoriq-pcie-v2.2",
 122         },
 123         /* The following two are for the Freescale hypervisor */
 124         {
 125                 .name           = "hypervisor",
 126         },
 127         {
 128                 .name           = "handles",
 129         },
 130         {}
 131 };
 132
 133 int __init corenet_ds_publish_devices(void)
 134 {
 135         return of_platform_bus_probe(NULL, of_device_ids, NULL);
 136 }