arch/powerpc/platforms/85xx/b4_qds.c

   1 /*
   2  * B4 QDS Setup
   3  * Should apply for QDS platform of B4860 and it's personalities.
   4  * viz B4860/B4420/B4220QDS
   5  *
   6  * Copyright 2012 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/phy.h>
  20
  21 #include <asm/time.h>
  22 #include <asm/machdep.h>
  23 #include <asm/pci-bridge.h>
  24 #include <mm/mmu_decl.h>
  25 #include <asm/prom.h>
  26 #include <asm/udbg.h>
  27 #include <asm/mpic.h>
  28
  29 #include <linux/of_platform.h>
  30 #include <sysdev/fsl_soc.h>
  31 #include <sysdev/fsl_pci.h>
  32 #include <asm/ehv_pic.h>
  33
  34 #include "corenet_ds.h"
  35
  36 /*
  37  * Called very early, device-tree isn't unflattened
  38  */
  39 static int __init b4_qds_probe(void)
  40 {
  41         unsigned long root = of_get_flat_dt_root();
  42 #ifdef CONFIG_SMP
  43         extern struct smp_ops_t smp_85xx_ops;
  44 #endif
  45
  46         if ((of_flat_dt_is_compatible(root, "fsl,B4860QDS")) ||
  47                 (of_flat_dt_is_compatible(root, "fsl,B4420QDS")) ||
  48                         (of_flat_dt_is_compatible(root, "fsl,B4220QDS")))
  49                 return 1;
  50
  51         /* Check if we're running under the Freescale hypervisor */
  52         if ((of_flat_dt_is_compatible(root, "fsl,B4860QDS-hv")) ||
  53                 (of_flat_dt_is_compatible(root, "fsl,B4420QDS-hv")) ||
  54                         (of_flat_dt_is_compatible(root, "fsl,B4220QDS-hv"))) {
  55                 ppc_md.init_IRQ = ehv_pic_init;
  56                 ppc_md.get_irq = ehv_pic_get_irq;
  57                 ppc_md.restart = fsl_hv_restart;
  58                 ppc_md.power_off = fsl_hv_halt;
  59                 ppc_md.halt = fsl_hv_halt;
  60 #ifdef CONFIG_SMP
  61                 /*
  62                  * Disable the timebase sync operations because we can't write
  63                  * to the timebase registers under the hypervisor.
  64                   */
  65                 smp_85xx_ops.give_timebase = NULL;
  66                 smp_85xx_ops.take_timebase = NULL;
  67 #endif
  68                 return 1;
  69         }
  70
  71         return 0;
  72 }
  73
  74 define_machine(b4_qds) {
  75         .name                   = "B4 QDS",
  76         .probe                  = b4_qds_probe,
  77         .setup_arch             = corenet_ds_setup_arch,
  78         .init_IRQ               = corenet_ds_pic_init,
  79 #ifdef CONFIG_PCI
  80         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
  81 #endif
  82 /* coreint doesn't play nice with lazy EE, use legacy mpic for now */
  83 #ifdef CONFIG_PPC64
  84         .get_irq                = mpic_get_irq,
  85 #else
  86         .get_irq                = mpic_get_coreint_irq,
  87 #endif
  88         .restart                = fsl_rstcr_restart,
  89         .calibrate_decr         = generic_calibrate_decr,
  90         .progress               = udbg_progress,
  91 #ifdef CONFIG_PPC64
  92         .power_save             = book3e_idle,
  93 #else
  94         .power_save             = e500_idle,
  95 #endif
  96 };
  97
  98 machine_arch_initcall(b4_qds, corenet_ds_publish_devices);
  99
 100 #ifdef CONFIG_SWIOTLB
 101 machine_arch_initcall(b4_qds, swiotlb_setup_bus_notifier);
 102 #endif