LXR linux/arch/powerpc/platforms/86xx/sbc8641d.c

   1/*
   2 * SBC8641D board specific routines
   3 *
   4 * Copyright 2008 Wind River Systems Inc.
   5 *
   6 * By Paul Gortmaker (see MAINTAINERS for contact information)
   7 *
   8 * Based largely on the 8641 HPCN support by Freescale Semiconductor Inc.
   9 *
  10 * This program is free software; you can redistribute  it and/or modify it
  11 * under  the terms of  the GNU General  Public License as published by the
  12 * Free Software Foundation;  either version 2 of the  License, or (at your
  13 * option) any later version.
  14 */
  15
  16#include <linux/stddef.h>
  17#include <linux/kernel.h>
  18#include <linux/pci.h>
  19#include <linux/kdev_t.h>
  20#include <linux/delay.h>
  21#include <linux/seq_file.h>
  22#include <linux/of_platform.h>
  23
  24#include <asm/time.h>
  25#include <asm/machdep.h>
  26#include <asm/pci-bridge.h>
  27#include <asm/prom.h>
  28#include <mm/mmu_decl.h>
  29#include <asm/udbg.h>
  30
  31#include <asm/mpic.h>
  32
  33#include <sysdev/fsl_pci.h>
  34#include <sysdev/fsl_soc.h>
  35
  36#include "mpc86xx.h"
  37
  38static void __init
  39sbc8641_setup_arch(void)
  40{
  41        if (ppc_md.progress)
  42                ppc_md.progress("sbc8641_setup_arch()", 0);
  43
  44        printk("SBC8641 board from Wind River\n");
  45
  46#ifdef CONFIG_SMP
  47        mpc86xx_smp_init();
  48#endif
  49
  50        fsl_pci_assign_primary();
  51}
  52
  53
  54static void
  55sbc8641_show_cpuinfo(struct seq_file *m)
  56{
  57        uint svid = mfspr(SPRN_SVR);
  58
  59        seq_printf(m, "Vendor\t\t: Wind River Systems\n");
  60
  61        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  62}
  63
  64
  65/*
  66 * Called very early, device-tree isn't unflattened
  67 */
  68static int __init sbc8641_probe(void)
  69{
  70        unsigned long root = of_get_flat_dt_root();
  71
  72        if (of_flat_dt_is_compatible(root, "wind,sbc8641"))
  73                return 1;       /* Looks good */
  74
  75        return 0;
  76}
  77
  78static long __init
  79mpc86xx_time_init(void)
  80{
  81        unsigned int temp;
  82
  83        /* Set the time base to zero */
  84        mtspr(SPRN_TBWL, 0);
  85        mtspr(SPRN_TBWU, 0);
  86
  87        temp = mfspr(SPRN_HID0);
  88        temp |= HID0_TBEN;
  89        mtspr(SPRN_HID0, temp);
  90        asm volatile("isync");
  91
  92        return 0;
  93}
  94
  95static __initdata struct of_device_id of_bus_ids[] = {
  96        { .compatible = "simple-bus", },
  97        { .compatible = "gianfar", },
  98        { .compatible = "fsl,mpc8641-pcie", },
  99        {},
 100};
 101
 102static int __init declare_of_platform_devices(void)
 103{
 104        of_platform_bus_probe(NULL, of_bus_ids, NULL);
 105
 106        return 0;
 107}
 108machine_arch_initcall(sbc8641, declare_of_platform_devices);
 109
 110define_machine(sbc8641) {
 111        .name                   = "SBC8641D",
 112        .probe                  = sbc8641_probe,
 113        .setup_arch             = sbc8641_setup_arch,
 114        .init_IRQ               = mpc86xx_init_irq,
 115        .show_cpuinfo           = sbc8641_show_cpuinfo,
 116        .get_irq                = mpic_get_irq,
 117        .restart                = fsl_rstcr_restart,
 118        .time_init              = mpc86xx_time_init,
 119        .calibrate_decr         = generic_calibrate_decr,
 120        .progress               = udbg_progress,
 121#ifdef CONFIG_PCI
 122        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 123#endif
 124};
 125