linux/arch/powerpc/platforms/86xx/sbc8641d.c
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   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/system.h>
  25#include <asm/time.h>
  26#include <asm/machdep.h>
  27#include <asm/pci-bridge.h>
  28#include <asm/prom.h>
  29#include <mm/mmu_decl.h>
  30#include <asm/udbg.h>
  31
  32#include <asm/mpic.h>
  33
  34#include <sysdev/fsl_pci.h>
  35#include <sysdev/fsl_soc.h>
  36
  37#include "mpc86xx.h"
  38
  39static void __init
  40sbc8641_setup_arch(void)
  41{
  42#ifdef CONFIG_PCI
  43        struct device_node *np;
  44#endif
  45
  46        if (ppc_md.progress)
  47                ppc_md.progress("sbc8641_setup_arch()", 0);
  48
  49#ifdef CONFIG_PCI
  50        for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie")
  51                fsl_add_bridge(np, 0);
  52#endif
  53
  54        printk("SBC8641 board from Wind River\n");
  55
  56#ifdef CONFIG_SMP
  57        mpc86xx_smp_init();
  58#endif
  59}
  60
  61
  62static void
  63sbc8641_show_cpuinfo(struct seq_file *m)
  64{
  65        uint svid = mfspr(SPRN_SVR);
  66
  67        seq_printf(m, "Vendor\t\t: Wind River Systems\n");
  68
  69        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  70}
  71
  72
  73/*
  74 * Called very early, device-tree isn't unflattened
  75 */
  76static int __init sbc8641_probe(void)
  77{
  78        unsigned long root = of_get_flat_dt_root();
  79
  80        if (of_flat_dt_is_compatible(root, "wind,sbc8641"))
  81                return 1;       /* Looks good */
  82
  83        return 0;
  84}
  85
  86static long __init
  87mpc86xx_time_init(void)
  88{
  89        unsigned int temp;
  90
  91        /* Set the time base to zero */
  92        mtspr(SPRN_TBWL, 0);
  93        mtspr(SPRN_TBWU, 0);
  94
  95        temp = mfspr(SPRN_HID0);
  96        temp |= HID0_TBEN;
  97        mtspr(SPRN_HID0, temp);
  98        asm volatile("isync");
  99
 100        return 0;
 101}
 102
 103static __initdata struct of_device_id of_bus_ids[] = {
 104        { .compatible = "simple-bus", },
 105        { .compatible = "gianfar", },
 106        {},
 107};
 108
 109static int __init declare_of_platform_devices(void)
 110{
 111        of_platform_bus_probe(NULL, of_bus_ids, NULL);
 112
 113        return 0;
 114}
 115machine_device_initcall(sbc8641, declare_of_platform_devices);
 116
 117define_machine(sbc8641) {
 118        .name                   = "SBC8641D",
 119        .probe                  = sbc8641_probe,
 120        .setup_arch             = sbc8641_setup_arch,
 121        .init_IRQ               = mpc86xx_init_irq,
 122        .show_cpuinfo           = sbc8641_show_cpuinfo,
 123        .get_irq                = mpic_get_irq,
 124        .restart                = fsl_rstcr_restart,
 125        .time_init              = mpc86xx_time_init,
 126        .calibrate_decr         = generic_calibrate_decr,
 127        .progress               = udbg_progress,
 128#ifdef CONFIG_PCI
 129        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 130#endif
 131};
 132