linux/arch/powerpc/platforms/86xx/mpc86xx_hpcn.c
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   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#include <linux/memblock.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#include <asm/swiotlb.h>
  32
  33#include <asm/mpic.h>
  34
  35#include <sysdev/fsl_pci.h>
  36#include <sysdev/fsl_soc.h>
  37
  38#include "mpc86xx.h"
  39
  40#undef DEBUG
  41
  42#ifdef DEBUG
  43#define DBG(fmt...) do { printk(KERN_ERR fmt); } while(0)
  44#else
  45#define DBG(fmt...) do { } while(0)
  46#endif
  47
  48#ifdef CONFIG_PCI
  49extern int uli_exclude_device(struct pci_controller *hose,
  50                                u_char bus, u_char devfn);
  51
  52static int mpc86xx_exclude_device(struct pci_controller *hose,
  53                                   u_char bus, u_char devfn)
  54{
  55        struct device_node* node;       
  56        struct resource rsrc;
  57
  58        node = hose->dn;
  59        of_address_to_resource(node, 0, &rsrc);
  60
  61        if ((rsrc.start & 0xfffff) == 0x8000) {
  62                return uli_exclude_device(hose, bus, devfn);
  63        }
  64
  65        return PCIBIOS_SUCCESSFUL;
  66}
  67#endif /* CONFIG_PCI */
  68
  69
  70static void __init
  71mpc86xx_hpcn_setup_arch(void)
  72{
  73#ifdef CONFIG_PCI
  74        struct device_node *np;
  75        struct pci_controller *hose;
  76#endif
  77        dma_addr_t max = 0xffffffff;
  78
  79        if (ppc_md.progress)
  80                ppc_md.progress("mpc86xx_hpcn_setup_arch()", 0);
  81
  82#ifdef CONFIG_PCI
  83        for_each_compatible_node(np, "pci", "fsl,mpc8641-pcie") {
  84                struct resource rsrc;
  85                of_address_to_resource(np, 0, &rsrc);
  86                if ((rsrc.start & 0xfffff) == 0x8000)
  87                        fsl_add_bridge(np, 1);
  88                else
  89                        fsl_add_bridge(np, 0);
  90                hose = pci_find_hose_for_OF_device(np);
  91                max = min(max, hose->dma_window_base_cur +
  92                          hose->dma_window_size);
  93        }
  94
  95        ppc_md.pci_exclude_device = mpc86xx_exclude_device;
  96
  97#endif
  98
  99        printk("MPC86xx HPCN board from Freescale Semiconductor\n");
 100
 101#ifdef CONFIG_SMP
 102        mpc86xx_smp_init();
 103#endif
 104
 105#ifdef CONFIG_SWIOTLB
 106        if (memblock_end_of_DRAM() > max) {
 107                ppc_swiotlb_enable = 1;
 108                set_pci_dma_ops(&swiotlb_dma_ops);
 109                ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
 110        }
 111#endif
 112}
 113
 114
 115static void
 116mpc86xx_hpcn_show_cpuinfo(struct seq_file *m)
 117{
 118        uint svid = mfspr(SPRN_SVR);
 119
 120        seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
 121
 122        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 123}
 124
 125
 126/*
 127 * Called very early, device-tree isn't unflattened
 128 */
 129static int __init mpc86xx_hpcn_probe(void)
 130{
 131        unsigned long root = of_get_flat_dt_root();
 132
 133        if (of_flat_dt_is_compatible(root, "fsl,mpc8641hpcn"))
 134                return 1;       /* Looks good */
 135
 136        /* Be nice and don't give silent boot death.  Delete this in 2.6.27 */
 137        if (of_flat_dt_is_compatible(root, "mpc86xx")) {
 138                pr_warning("WARNING: your dts/dtb is old. You must update before the next kernel release\n");
 139                return 1;
 140        }
 141
 142        return 0;
 143}
 144
 145static long __init
 146mpc86xx_time_init(void)
 147{
 148        unsigned int temp;
 149
 150        /* Set the time base to zero */
 151        mtspr(SPRN_TBWL, 0);
 152        mtspr(SPRN_TBWU, 0);
 153
 154        temp = mfspr(SPRN_HID0);
 155        temp |= HID0_TBEN;
 156        mtspr(SPRN_HID0, temp);
 157        asm volatile("isync");
 158
 159        return 0;
 160}
 161
 162static __initdata struct of_device_id of_bus_ids[] = {
 163        { .compatible = "simple-bus", },
 164        { .compatible = "fsl,srio", },
 165        { .compatible = "gianfar", },
 166        {},
 167};
 168
 169static int __init declare_of_platform_devices(void)
 170{
 171        of_platform_bus_probe(NULL, of_bus_ids, NULL);
 172
 173        return 0;
 174}
 175machine_device_initcall(mpc86xx_hpcn, declare_of_platform_devices);
 176machine_arch_initcall(mpc86xx_hpcn, swiotlb_setup_bus_notifier);
 177
 178define_machine(mpc86xx_hpcn) {
 179        .name                   = "MPC86xx HPCN",
 180        .probe                  = mpc86xx_hpcn_probe,
 181        .setup_arch             = mpc86xx_hpcn_setup_arch,
 182        .init_IRQ               = mpc86xx_init_irq,
 183        .show_cpuinfo           = mpc86xx_hpcn_show_cpuinfo,
 184        .get_irq                = mpic_get_irq,
 185        .restart                = fsl_rstcr_restart,
 186        .time_init              = mpc86xx_time_init,
 187        .calibrate_decr         = generic_calibrate_decr,
 188        .progress               = udbg_progress,
 189#ifdef CONFIG_PCI
 190        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 191#endif
 192};
 193