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_fdt.h>
  23 #include <linux/of_platform.h>
  24
  25 #include <asm/machdep.h>
  26 #include <asm/udbg.h>
  27 #include <asm/mpic.h>
  28
  29 #include <sysdev/fsl_soc.h>
  30
  31 static void __init ppa8548_pic_init(void)
  32 {
  33         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
  34                         0, 256, " OpenPIC  ");
  35         BUG_ON(mpic == NULL);
  36         mpic_init(mpic);
  37 }
  38
  39 /*
  40  * Setup the architecture
  41  */
  42 static void __init ppa8548_setup_arch(void)
  43 {
  44         if (ppc_md.progress)
  45                 ppc_md.progress("ppa8548_setup_arch()", 0);
  46 }
  47
  48 static void ppa8548_show_cpuinfo(struct seq_file *m)
  49 {
  50         uint32_t svid, phid1;
  51
  52         svid = mfspr(SPRN_SVR);
  53
  54         seq_printf(m, "Vendor\t\t: Prodrive B.V.\n");
  55         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  56
  57         /* Display cpu Pll setting */
  58         phid1 = mfspr(SPRN_HID1);
  59         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
  60 }
  61
  62 static const struct of_device_id of_bus_ids[] __initconst = {
  63         { .name = "soc", },
  64         { .type = "soc", },
  65         { .compatible = "simple-bus", },
  66         { .compatible = "gianfar", },
  67         { .compatible = "fsl,srio", },
  68         {},
  69 };
  70
  71 static int __init declare_of_platform_devices(void)
  72 {
  73         of_platform_bus_probe(NULL, of_bus_ids, NULL);
  74
  75         return 0;
  76 }
  77 machine_device_initcall(ppa8548, declare_of_platform_devices);
  78
  79 /*
  80  * Called very early, device-tree isn't unflattened
  81  */
  82 static int __init ppa8548_probe(void)
  83 {
  84         return of_machine_is_compatible("ppa8548");
  85 }
  86
  87 define_machine(ppa8548) {
  88         .name           = "ppa8548",
  89         .probe          = ppa8548_probe,
  90         .setup_arch     = ppa8548_setup_arch,
  91         .init_IRQ       = ppa8548_pic_init,
  92         .show_cpuinfo   = ppa8548_show_cpuinfo,
  93         .get_irq        = mpic_get_irq,
  94         .calibrate_decr = generic_calibrate_decr,
  95         .progress       = udbg_progress,
  96 };