LXR linux/arch/powerpc/platforms/85xx/ppa8548.c

   1/*
   2 * ppa8548 setup and early boot code.
   3 *
   4 * Copyright 2009 Prodrive B.V..
   5 *
   6 * By Stef van Os (see MAINTAINERS for contact information)
   7 *
   8 * Based on the SBC8548 support - Copyright 2007 Wind River Systems Inc.
   9 * Based on the MPC8548CDS support - Copyright 2005 Freescale Inc.
  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/reboot.h>
  21#include <linux/seq_file.h>
  22#include <linux/of_platform.h>
  23
  24#include <asm/machdep.h>
  25#include <asm/udbg.h>
  26#include <asm/mpic.h>
  27
  28#include <sysdev/fsl_soc.h>
  29
  30static void __init ppa8548_pic_init(void)
  31{
  32        struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
  33                        0, 256, " OpenPIC  ");
  34        BUG_ON(mpic == NULL);
  35        mpic_init(mpic);
  36}
  37
  38/*
  39 * Setup the architecture
  40 */
  41static void __init ppa8548_setup_arch(void)
  42{
  43        if (ppc_md.progress)
  44                ppc_md.progress("ppa8548_setup_arch()", 0);
  45}
  46
  47static void ppa8548_show_cpuinfo(struct seq_file *m)
  48{
  49        uint32_t svid, phid1;
  50
  51        svid = mfspr(SPRN_SVR);
  52
  53        seq_printf(m, "Vendor\t\t: Prodrive B.V.\n");
  54        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  55
  56        /* Display cpu Pll setting */
  57        phid1 = mfspr(SPRN_HID1);
  58        seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
  59}
  60
  61static struct of_device_id __initdata of_bus_ids[] = {
  62        { .name = "soc", },
  63        { .type = "soc", },
  64        { .compatible = "simple-bus", },
  65        { .compatible = "gianfar", },
  66        { .compatible = "fsl,srio", },
  67        {},
  68};
  69
  70static int __init declare_of_platform_devices(void)
  71{
  72        of_platform_bus_probe(NULL, of_bus_ids, NULL);
  73
  74        return 0;
  75}
  76machine_device_initcall(ppa8548, declare_of_platform_devices);
  77
  78/*
  79 * Called very early, device-tree isn't unflattened
  80 */
  81static int __init ppa8548_probe(void)
  82{
  83        unsigned long root = of_get_flat_dt_root();
  84
  85        return of_flat_dt_is_compatible(root, "ppa8548");
  86}
  87
  88define_machine(ppa8548) {
  89        .name           = "ppa8548",
  90        .probe          = ppa8548_probe,
  91        .setup_arch     = ppa8548_setup_arch,
  92        .init_IRQ       = ppa8548_pic_init,
  93        .show_cpuinfo   = ppa8548_show_cpuinfo,
  94        .get_irq        = mpic_get_irq,
  95        .restart        = fsl_rstcr_restart,
  96        .calibrate_decr = generic_calibrate_decr,
  97        .progress       = udbg_progress,
  98};
  99