linux/arch/powerpc/platforms/85xx/sbc8548.c
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   1/*
   2 * Wind River SBC8548 setup and early boot code.
   3 *
   4 * Copyright 2007 Wind River Systems Inc.
   5 *
   6 * By Paul Gortmaker (see MAINTAINERS for contact information)
   7 *
   8 * Based largely on the MPC8548CDS support - Copyright 2005 Freescale Inc.
   9 *
  10 *
  11 * This program is free software; you can redistribute  it and/or modify it
  12 * under  the terms of  the GNU General  Public License as published by the
  13 * Free Software Foundation;  either version 2 of the  License, or (at your
  14 * option) any later version.
  15 */
  16
  17#include <linux/stddef.h>
  18#include <linux/kernel.h>
  19#include <linux/init.h>
  20#include <linux/errno.h>
  21#include <linux/reboot.h>
  22#include <linux/pci.h>
  23#include <linux/kdev_t.h>
  24#include <linux/major.h>
  25#include <linux/console.h>
  26#include <linux/delay.h>
  27#include <linux/seq_file.h>
  28#include <linux/initrd.h>
  29#include <linux/interrupt.h>
  30#include <linux/fsl_devices.h>
  31#include <linux/of_platform.h>
  32
  33#include <asm/system.h>
  34#include <asm/pgtable.h>
  35#include <asm/page.h>
  36#include <linux/atomic.h>
  37#include <asm/time.h>
  38#include <asm/io.h>
  39#include <asm/machdep.h>
  40#include <asm/ipic.h>
  41#include <asm/pci-bridge.h>
  42#include <asm/irq.h>
  43#include <mm/mmu_decl.h>
  44#include <asm/prom.h>
  45#include <asm/udbg.h>
  46#include <asm/mpic.h>
  47
  48#include <sysdev/fsl_soc.h>
  49#include <sysdev/fsl_pci.h>
  50
  51#include "mpc85xx.h"
  52
  53static int sbc_rev;
  54
  55static void __init sbc8548_pic_init(void)
  56{
  57        struct mpic *mpic = mpic_alloc(NULL, 0,
  58                        MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  59                        0, 256, " OpenPIC  ");
  60        BUG_ON(mpic == NULL);
  61        mpic_init(mpic);
  62}
  63
  64/* Extract the HW Rev from the EPLD on the board */
  65static int __init sbc8548_hw_rev(void)
  66{
  67        struct device_node *np;
  68        struct resource res;
  69        unsigned int *rev;
  70        int board_rev = 0;
  71
  72        np = of_find_compatible_node(NULL, NULL, "hw-rev");
  73        if (np == NULL) {
  74                printk("No HW-REV found in DTB.\n");
  75                return -ENODEV;
  76        }
  77
  78        of_address_to_resource(np, 0, &res);
  79        of_node_put(np);
  80
  81        rev = ioremap(res.start,sizeof(unsigned int));
  82        board_rev = (*rev) >> 28;
  83        iounmap(rev);
  84
  85        return board_rev;
  86}
  87
  88/*
  89 * Setup the architecture
  90 */
  91static void __init sbc8548_setup_arch(void)
  92{
  93#ifdef CONFIG_PCI
  94        struct device_node *np;
  95#endif
  96
  97        if (ppc_md.progress)
  98                ppc_md.progress("sbc8548_setup_arch()", 0);
  99
 100#ifdef CONFIG_PCI
 101        for_each_node_by_type(np, "pci") {
 102                if (of_device_is_compatible(np, "fsl,mpc8540-pci") ||
 103                    of_device_is_compatible(np, "fsl,mpc8548-pcie")) {
 104                        struct resource rsrc;
 105                        of_address_to_resource(np, 0, &rsrc);
 106                        if ((rsrc.start & 0xfffff) == 0x8000)
 107                                fsl_add_bridge(np, 1);
 108                        else
 109                                fsl_add_bridge(np, 0);
 110                }
 111        }
 112#endif
 113        sbc_rev = sbc8548_hw_rev();
 114}
 115
 116static void sbc8548_show_cpuinfo(struct seq_file *m)
 117{
 118        uint pvid, svid, phid1;
 119
 120        pvid = mfspr(SPRN_PVR);
 121        svid = mfspr(SPRN_SVR);
 122
 123        seq_printf(m, "Vendor\t\t: Wind River\n");
 124        seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
 125        seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 126        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 127
 128        /* Display cpu Pll setting */
 129        phid1 = mfspr(SPRN_HID1);
 130        seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 131}
 132
 133machine_device_initcall(sbc8548, mpc85xx_common_publish_devices);
 134
 135/*
 136 * Called very early, device-tree isn't unflattened
 137 */
 138static int __init sbc8548_probe(void)
 139{
 140        unsigned long root = of_get_flat_dt_root();
 141
 142        return of_flat_dt_is_compatible(root, "SBC8548");
 143}
 144
 145define_machine(sbc8548) {
 146        .name           = "SBC8548",
 147        .probe          = sbc8548_probe,
 148        .setup_arch     = sbc8548_setup_arch,
 149        .init_IRQ       = sbc8548_pic_init,
 150        .show_cpuinfo   = sbc8548_show_cpuinfo,
 151        .get_irq        = mpic_get_irq,
 152        .restart        = fsl_rstcr_restart,
 153#ifdef CONFIG_PCI
 154        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 155#endif
 156        .calibrate_decr = generic_calibrate_decr,
 157        .progress       = udbg_progress,
 158};
 159