LXR linux/arch/powerpc/platforms/85xx/sbc8548.c

   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/pgtable.h>
  34#include <asm/page.h>
  35#include <linux/atomic.h>
  36#include <asm/time.h>
  37#include <asm/io.h>
  38#include <asm/machdep.h>
  39#include <asm/ipic.h>
  40#include <asm/pci-bridge.h>
  41#include <asm/irq.h>
  42#include <mm/mmu_decl.h>
  43#include <asm/prom.h>
  44#include <asm/udbg.h>
  45#include <asm/mpic.h>
  46
  47#include <sysdev/fsl_soc.h>
  48#include <sysdev/fsl_pci.h>
  49
  50#include "mpc85xx.h"
  51
  52static int sbc_rev;
  53
  54static void __init sbc8548_pic_init(void)
  55{
  56        struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
  57                        0, 256, " OpenPIC  ");
  58        BUG_ON(mpic == NULL);
  59        mpic_init(mpic);
  60}
  61
  62/* Extract the HW Rev from the EPLD on the board */
  63static int __init sbc8548_hw_rev(void)
  64{
  65        struct device_node *np;
  66        struct resource res;
  67        unsigned int *rev;
  68        int board_rev = 0;
  69
  70        np = of_find_compatible_node(NULL, NULL, "hw-rev");
  71        if (np == NULL) {
  72                printk("No HW-REV found in DTB.\n");
  73                return -ENODEV;
  74        }
  75
  76        of_address_to_resource(np, 0, &res);
  77        of_node_put(np);
  78
  79        rev = ioremap(res.start,sizeof(unsigned int));
  80        board_rev = (*rev) >> 28;
  81        iounmap(rev);
  82
  83        return board_rev;
  84}
  85
  86/*
  87 * Setup the architecture
  88 */
  89static void __init sbc8548_setup_arch(void)
  90{
  91        if (ppc_md.progress)
  92                ppc_md.progress("sbc8548_setup_arch()", 0);
  93
  94        fsl_pci_assign_primary();
  95
  96        sbc_rev = sbc8548_hw_rev();
  97}
  98
  99static void sbc8548_show_cpuinfo(struct seq_file *m)
 100{
 101        uint pvid, svid, phid1;
 102
 103        pvid = mfspr(SPRN_PVR);
 104        svid = mfspr(SPRN_SVR);
 105
 106        seq_printf(m, "Vendor\t\t: Wind River\n");
 107        seq_printf(m, "Machine\t\t: SBC8548 v%d\n", sbc_rev);
 108        seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 109        seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 110
 111        /* Display cpu Pll setting */
 112        phid1 = mfspr(SPRN_HID1);
 113        seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 114}
 115
 116machine_arch_initcall(sbc8548, mpc85xx_common_publish_devices);
 117
 118/*
 119 * Called very early, device-tree isn't unflattened
 120 */
 121static int __init sbc8548_probe(void)
 122{
 123        unsigned long root = of_get_flat_dt_root();
 124
 125        return of_flat_dt_is_compatible(root, "SBC8548");
 126}
 127
 128define_machine(sbc8548) {
 129        .name           = "SBC8548",
 130        .probe          = sbc8548_probe,
 131        .setup_arch     = sbc8548_setup_arch,
 132        .init_IRQ       = sbc8548_pic_init,
 133        .show_cpuinfo   = sbc8548_show_cpuinfo,
 134        .get_irq        = mpic_get_irq,
 135        .restart        = fsl_rstcr_restart,
 136#ifdef CONFIG_PCI
 137        .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 138#endif
 139        .calibrate_decr = generic_calibrate_decr,
 140        .progress       = udbg_progress,
 141};
 142