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 <soc/fsl/qe/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         /* The following two are for the Freescale hypervisor */
 121         {
 122                 .name           = "hypervisor",
 123         },
 124         {
 125                 .name           = "handles",
 126         },
 127         {}
 128 };
 129
 130 int __init corenet_gen_publish_devices(void)
 131 {
 132         return of_platform_bus_probe(NULL, of_device_ids, NULL);
 133 }
 134
 135 static const char * const boards[] __initconst = {
 136         "fsl,P2041RDB",
 137         "fsl,P3041DS",
 138         "fsl,OCA4080",
 139         "fsl,P4080DS",
 140         "fsl,P5020DS",
 141         "fsl,P5040DS",
 142         "fsl,T2080QDS",
 143         "fsl,T2080RDB",
 144         "fsl,T2081QDS",
 145         "fsl,T4240QDS",
 146         "fsl,T4240RDB",
 147         "fsl,B4860QDS",
 148         "fsl,B4420QDS",
 149         "fsl,B4220QDS",
 150         "fsl,T1023RDB",
 151         "fsl,T1024QDS",
 152         "fsl,T1024RDB",
 153         "fsl,T1040D4RDB",
 154         "fsl,T1042D4RDB",
 155         "fsl,T1040QDS",
 156         "fsl,T1042QDS",
 157         "fsl,T1040RDB",
 158         "fsl,T1042RDB",
 159         "fsl,T1042RDB_PI",
 160         "keymile,kmcoge4",
 161         "varisys,CYRUS",
 162         NULL
 163 };
 164
 165 /*
 166  * Called very early, device-tree isn't unflattened
 167  */
 168 static int __init corenet_generic_probe(void)
 169 {
 170         char hv_compat[24];
 171         int i;
 172 #ifdef CONFIG_SMP
 173         extern struct smp_ops_t smp_85xx_ops;
 174 #endif
 175
 176         if (of_device_compatible_match(of_root, boards))
 177                 return 1;
 178
 179         /* Check if we're running under the Freescale hypervisor */
 180         for (i = 0; boards[i]; i++) {
 181                 snprintf(hv_compat, sizeof(hv_compat), "%s-hv", boards[i]);
 182                 if (of_machine_is_compatible(hv_compat)) {
 183                         ppc_md.init_IRQ = ehv_pic_init;
 184
 185                         ppc_md.get_irq = ehv_pic_get_irq;
 186                         ppc_md.restart = fsl_hv_restart;
 187                         pm_power_off = fsl_hv_halt;
 188                         ppc_md.halt = fsl_hv_halt;
 189 #ifdef CONFIG_SMP
 190                         /*
 191                          * Disable the timebase sync operations because we
 192                          * can't write to the timebase registers under the
 193                          * hypervisor.
 194                          */
 195                         smp_85xx_ops.give_timebase = NULL;
 196                         smp_85xx_ops.take_timebase = NULL;
 197 #endif
 198                         return 1;
 199                 }
 200         }
 201
 202         return 0;
 203 }
 204
 205 define_machine(corenet_generic) {
 206         .name                   = "CoreNet Generic",
 207         .probe                  = corenet_generic_probe,
 208         .setup_arch             = corenet_gen_setup_arch,
 209         .init_IRQ               = corenet_gen_pic_init,
 210 #ifdef CONFIG_PCI
 211         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 212         .pcibios_fixup_phb      = fsl_pcibios_fixup_phb,
 213 #endif
 214 /*
 215  * Core reset may cause issues if using the proxy mode of MPIC.
 216  * So, use the mixed mode of MPIC if enabling CPU hotplug.
 217  *
 218  * Likewise, problems have been seen with kexec when coreint is enabled.
 219  */
 220 #if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_KEXEC_CORE)
 221         .get_irq                = mpic_get_irq,
 222 #else
 223         .get_irq                = mpic_get_coreint_irq,
 224 #endif
 225         .calibrate_decr         = generic_calibrate_decr,
 226         .progress               = udbg_progress,
 227 #ifdef CONFIG_PPC64
 228         .power_save             = book3e_idle,
 229 #else
 230         .power_save             = e500_idle,
 231 #endif
 232 };
 233
 234 machine_arch_initcall(corenet_generic, corenet_gen_publish_devices);
 235
 236 #ifdef CONFIG_SWIOTLB
 237 machine_arch_initcall(corenet_generic, swiotlb_setup_bus_notifier);
 238 #endif