LXR linux/arch/powerpc/platforms/86xx/mpc86xx

   1/*
   2 * MPC86xx HPCN board specific routines
   3 *
   4 * Recode: ZHANG WEI <wei.zhang@freescale.com>
   5 * Initial author: Xianghua Xiao <x.xiao@freescale.com>
   6 *
   7 * Copyright 2006 Freescale Semiconductor Inc.
   8 *
   9 * This program is free software; you can redistribute  it and/or modify it
  10 * under  the terms of  the GNU General  Public License as published by the
  11 * Free Software Foundation;  either version 2 of the  License, or (at your
  12 * option) any later version.
  13 */
  14
  15#include <linux/stddef.h>
  16#include <linux/kernel.h>
  17#include <linux/pci.h>
  18#include <linux/kdev_t.h>
  19#include <linux/delay.h>
  20#include <linux/seq_file.h>
  21#include <linux/of_platform.h>
  22
  23#include <asm/time.h>
  24#include <asm/machdep.h>
  25#include <asm/pci-bridge.h>
  26#include <asm/prom.h>
  27#include <mm/mmu_decl.h>
  28#include <asm/udbg.h>
  29#include <asm/swiotlb.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
  38#undef DEBUG
  39
  40#ifdef DEBUG
  41#define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
  42#else
  43#define DBG(fmt...) do { } while(0)
  44#endif
  45
  46#ifdef CONFIG_PCI
  47extern int uli_exclude_device(struct pci_controller *hose,
  48                                u_char bus, u_char devfn);
  49
  50static int mpc86xx_exclude_device(struct pci_controller *hose,
  51                                   u_char bus, u_char devfn)
  52{
  53        if (hose->dn == fsl_pci_primary)
  54                return uli_exclude_device(hose, bus, devfn);
  55
  56        return PCIBIOS_SUCCESSFUL;
  57}
  58#endif /* CONFIG_PCI */
  59
  60
  61static void __init
  62mpc86xx_hpcn_setup_arch(void)
  63{
  64        if (ppc_md.progress)
  65                ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
  66
  67#ifdef CONFIG_PCI
  68        ppc_md.pci_exclude_device = mpc86xx_exclude_device;
  69#endif
  70
  71        printk("MPC86xx HPCN board from Freescale Semiconductor\n");
  72
  73#ifdef CONFIG_SMP
  74        mpc86xx_smp_init();
  75#endif
  76
  77        fsl_pci_assign_primary();
  78
  79        swiotlb_detect_4g();
  80}
  81
  82
  83static void
  84mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
  85{
  86        uint svid = mfspr(SPRN_SVR);
  87
  88        seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
  89
  90        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  91}
  92
  93
  94/*
  95 * Called very early, device-tree isn't unflattened
  96 */
  97static int __init mpc86xx_hpcn_probe(void)
  98{
  99        unsigned long root = of_get_flat_dt_root();
 100
 101        if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn"))
 102                return 1;       /* Looks good */
 103
 104        /* Be nice and don't give silent boot death.  Delete this in 2.6.27 */
 105        if (of_flat_dt_is_compatible(root, "mpc86xx")) {
 106                pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n");
 107                return 1;
 108        }
 109
 110        return 0;
 111}
 112
 113static long __init
 114mpc86xx_time_init(void)
 115{
 116        unsigned int temp;
 117
 118        /* Set the time base to zero */
 119        mtspr(SPRN_TBWL, 0);
 120        mtspr(SPRN_TBWU, 0);
 121
 122        temp = mfspr(SPRN_HID0);
 123        temp |= HID0_TBEN;
 124        mtspr(SPRN_HID0, temp);
 125        asm volatile("isync");
 126
 127        return 0;
 128}
 129
 130static const struct of_device_id of_bus_ids[] __initconst = {
 131        { .compatible = "simple-bus", },
 132        { .compatible = "fsl,srio", },
 133        { .compatible = "gianfar", },
 134        { .compatible = "fsl,mpc8641-pcie", },
 135        {},
 136};
 137
 138static int __init declare_of_platform_devices(void)
 139{
 140        of_platform_bus_probe(NULL, of_bus_ids, NULL);
 141
 142        return 0;
 143}
 144machine_arch_initcall(mpc86xx_hpcn, declare_of_platform_devices);
 145machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier);
 146
 147define_machine(mpc86xx_hpcn) {
 148        .name                   = "MPC86xx HPCN",
 149        .probe                  = mpc86xx_hpcn_probe,
 150        .setup_arch             = mpc86xx_hpcn_setup_arch,
 151        .init_IRQ               = mpc86xx_init_irq,
 152        .show_cpuinfo           = mpc86xx_hpcn_show_cpuinfo,
 153        .get_irq                = mpic_get_irq,
 154        .restart                = fsl_rstcr_restart,
 155        .time_init              = mpc86xx_time_init,
 156        .calibrate_decr         = generic_calibrate_decr,
 157        .progress               = udbg_progress,
 158#ifdef CONFIG_PCI
 159        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 160#endif
 161};
 162