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
  30 static 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  */
  41 static void __init ppa8548_setup_arch(void)
  42 {
  43         if (ppc_md.progress)
  44                 ppc_md.progress("ppa8548_setup_arch()", 0);
  45 }
  46
  47 static 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
  61 static 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
  70 static int __init declare_of_platform_devices(void)
  71 {
  72         of_platform_bus_probe(NULL, of_bus_ids, NULL);
  73
  74         return 0;
  75 }
  76 machine_device_initcall(ppa8548, declare_of_platform_devices);
  77
  78 /*
  79  * Called very early, device-tree isn't unflattened
  80  */
  81 static 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
  88 define_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 };