kernel/arch/powerpc/platforms/85xx/corenet_generic.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
  20 #include <asm/time.h>
  21 #include <asm/machdep.h>
  22 #include <asm/pci-bridge.h>
  23 #include <asm/pgtable.h>
  24 #include <asm/ppc-pci.h>
  25 #include <mm/mmu_decl.h>
  26 #include <asm/prom.h>
  27 #include <asm/udbg.h>
  28 #include <asm/mpic.h>
  29 #include <asm/ehv_pic.h>
  30 #include <asm/qe_ic.h>
  31
  32 #include <linux/of_platform.h>
  33 #include <sysdev/fsl_soc.h>
  34 #include <sysdev/fsl_pci.h>
  35 #include "smp.h"
  36 #include "mpc85xx.h"
  37
  38 void __init corenet_gen_pic_init(void)
  39 {
  40         struct mpic *mpic;
  41         unsigned int flags = MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU |
  42                 MPIC_NO_RESET;
  43
  44         struct device_node *np;
  45
  46         if (ppc_md.get_irq == mpic_get_coreint_irq)
  47                 flags |= MPIC_ENABLE_COREINT;
  48
  49         mpic = mpic_alloc(NULL, 0, flags, 0, 512, " OpenPIC  ");
  50         BUG_ON(mpic == NULL);
  51
  52         mpic_init(mpic);
  53
  54         np = of_find_compatible_node(NULL, NULL, "fsl,qe-ic");
  55         if (np) {
  56                 qe_ic_init(np, 0, qe_ic_cascade_low_mpic,
  57                                 qe_ic_cascade_high_mpic);
  58                 of_node_put(np);
  59         }
  60 }
  61
  62 /*
  63  * Setup the architecture
  64  */
  65 void __init corenet_gen_setup_arch(void)
  66 {
  67         mpc85xx_smp_init();
  68
  69         swiotlb_detect_4g();
  70
  71 #if defined(CONFIG_FSL_PCI) && defined(CONFIG_ZONE_DMA32)
  72         /*
  73          * Inbound windows don't cover the full lower 4 GiB
  74          * due to conflicts with PCICSRBAR and outbound windows,
  75          * so limit the DMA32 zone to 2 GiB, to allow consistent
  76          * allocations to succeed.
  77          */
  78         limit_zone_pfn(ZONE_DMA32, 1UL << (31 - PAGE_SHIFT));
  79 #endif
  80
  81         pr_info("%s board\n", ppc_md.name);
  82
  83         mpc85xx_qe_init();
  84 }
  85
  86 static const struct of_device_id of_device_ids[] = {
  87         {
  88                 .compatible     = "simple-bus"
  89         },
  90         {
  91                 .compatible     = "mdio-mux-gpio"
  92         },
  93         {
  94                 .compatible     = "fsl,fpga-ngpixis"
  95         },
  96         {
  97                 .compatible     = "fsl,fpga-qixis"
  98         },
  99         {
 100                 .compatible     = "fsl,srio",
 101         },
 102         {
 103                 .compatible     = "fsl,p4080-pcie",
 104         },
 105         {
 106                 .compatible     = "fsl,qoriq-pcie-v2.2",
 107         },
 108         {
 109                 .compatible     = "fsl,qoriq-pcie-v2.3",
 110         },
 111         {
 112                 .compatible     = "fsl,qoriq-pcie-v2.4",
 113         },
 114         {
 115                 .compatible     = "fsl,qoriq-pcie-v3.0",
 116         },
 117         {
 118                 .compatible     = "fsl,qe",
 119         },
 120         {
 121                 .compatible    = "fsl,fman",
 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_gen_publish_devices(void)
 134 {
 135         return of_platform_bus_probe(NULL, of_device_ids, NULL);
 136 }
 137
 138 static const char * const boards[] __initconst = {
 139         "fsl,P2041RDB",
 140         "fsl,P3041DS",
 141         "fsl,OCA4080",
 142         "fsl,P4080DS",
 143         "fsl,P5020DS",
 144         "fsl,P5040DS",
 145         "fsl,T2080QDS",
 146         "fsl,T2080RDB",
 147         "fsl,T2081QDS",
 148         "fsl,T4240QDS",
 149         "fsl,T4240RDB",
 150         "fsl,B4860QDS",
 151         "fsl,B4420QDS",
 152         "fsl,B4220QDS",
 153         "fsl,T1023RDB",
 154         "fsl,T1024QDS",
 155         "fsl,T1024RDB",
 156         "fsl,T1040D4RDB",
 157         "fsl,T1042D4RDB",
 158         "fsl,T1040QDS",
 159         "fsl,T1042QDS",
 160         "fsl,T1040RDB",
 161         "fsl,T1042RDB",
 162         "fsl,T1042RDB_PI",
 163         "keymile,kmcoge4",
 164         "varisys,CYRUS",
 165         NULL
 166 };
 167
 168 /*
 169  * Called very early, device-tree isn't unflattened
 170  */
 171 static int __init corenet_generic_probe(void)
 172 {
 173         unsigned long root = of_get_flat_dt_root();
 174         char hv_compat[24];
 175         int i;
 176 #ifdef CONFIG_SMP
 177         extern struct smp_ops_t smp_85xx_ops;
 178 #endif
 179
 180         if (of_flat_dt_match(root, boards))
 181                 return 1;
 182
 183         /* Check if we're running under the Freescale hypervisor */
 184         for (i = 0; boards[i]; i++) {
 185                 snprintf(hv_compat, sizeof(hv_compat), "%s-hv", boards[i]);
 186                 if (of_flat_dt_is_compatible(root, hv_compat)) {
 187                         ppc_md.init_IRQ = ehv_pic_init;
 188
 189                         ppc_md.get_irq = ehv_pic_get_irq;
 190                         ppc_md.restart = fsl_hv_restart;
 191                         pm_power_off = fsl_hv_halt;
 192                         ppc_md.halt = fsl_hv_halt;
 193 #ifdef CONFIG_SMP
 194                         /*
 195                          * Disable the timebase sync operations because we
 196                          * can't write to the timebase registers under the
 197                          * hypervisor.
 198                          */
 199                         smp_85xx_ops.give_timebase = NULL;
 200                         smp_85xx_ops.take_timebase = NULL;
 201 #endif
 202                         return 1;
 203                 }
 204         }
 205
 206         return 0;
 207 }
 208
 209 define_machine(corenet_generic) {
 210         .name                   = "CoreNet Generic",
 211         .probe                  = corenet_generic_probe,
 212         .setup_arch             = corenet_gen_setup_arch,
 213         .init_IRQ               = corenet_gen_pic_init,
 214 #ifdef CONFIG_PCI
 215         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 216         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 217 #endif
 218 /*
 219  * Core reset may cause issues if using the proxy mode of MPIC.
 220  * So, use the mixed mode of MPIC if enabling CPU hotplug.
 221  *
 222  * Likewise, problems have been seen with kexec when coreint is enabled.
 223  */
 224 #if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_KEXEC)
 225         .get_irq                = mpic_get_irq,
 226 #else
 227         .get_irq                = mpic_get_coreint_irq,
 228 #endif
 229         .restart                = fsl_rstcr_restart,
 230         .calibrate_decr         = generic_calibrate_decr,
 231         .progress               = udbg_progress,
 232 #ifdef CONFIG_PPC64
 233         .power_save             = book3e_idle,
 234 #else
 235         .power_save             = e500_idle,
 236 #endif
 237 };
 238
 239 machine_arch_initcall(corenet_generic, corenet_gen_publish_devices);
 240
 241 #ifdef CONFIG_SWIOTLB
 242 machine_arch_initcall(corenet_generic, swiotlb_setup_bus_notifier);
 243 #endif