linux/arch/powerpc/platforms/83xx/mpc834x_mds.c
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   1/*
   2 * arch/powerpc/platforms/83xx/mpc834x_mds.c
   3 *
   4 * MPC834x MDS board specific routines
   5 *
   6 * Maintainer: Kumar Gala <galak@kernel.crashing.org>
   7 *
   8 * This program is free software; you can redistribute  it and/or modify it
   9 * under  the terms of  the GNU General  Public License as published by the
  10 * Free Software Foundation;  either version 2 of the  License, or (at your
  11 * option) any later version.
  12 */
  13
  14#include <linux/stddef.h>
  15#include <linux/kernel.h>
  16#include <linux/init.h>
  17#include <linux/errno.h>
  18#include <linux/reboot.h>
  19#include <linux/pci.h>
  20#include <linux/kdev_t.h>
  21#include <linux/major.h>
  22#include <linux/console.h>
  23#include <linux/delay.h>
  24#include <linux/seq_file.h>
  25#include <linux/root_dev.h>
  26#include <linux/of_platform.h>
  27
  28#include <asm/system.h>
  29#include <linux/atomic.h>
  30#include <asm/time.h>
  31#include <asm/io.h>
  32#include <asm/machdep.h>
  33#include <asm/ipic.h>
  34#include <asm/irq.h>
  35#include <asm/prom.h>
  36#include <asm/udbg.h>
  37#include <sysdev/fsl_soc.h>
  38#include <sysdev/fsl_pci.h>
  39
  40#include "mpc83xx.h"
  41
  42#define BCSR5_INT_USB           0x02
  43static int mpc834xemds_usb_cfg(void)
  44{
  45        struct device_node *np;
  46        void __iomem *bcsr_regs = NULL;
  47        u8 bcsr5;
  48
  49        mpc834x_usb_cfg();
  50        /* Map BCSR area */
  51        np = of_find_node_by_name(NULL, "bcsr");
  52        if (np) {
  53                struct resource res;
  54
  55                of_address_to_resource(np, 0, &res);
  56                bcsr_regs = ioremap(res.start, resource_size(&res));
  57                of_node_put(np);
  58        }
  59        if (!bcsr_regs)
  60                return -1;
  61
  62        /*
  63         * if Processor Board is plugged into PIB board,
  64         * force to use the PHY on Processor Board
  65         */
  66        bcsr5 = in_8(bcsr_regs + 5);
  67        if (!(bcsr5 & BCSR5_INT_USB))
  68                out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
  69        iounmap(bcsr_regs);
  70        return 0;
  71}
  72
  73/* ************************************************************************
  74 *
  75 * Setup the architecture
  76 *
  77 */
  78static void __init mpc834x_mds_setup_arch(void)
  79{
  80        if (ppc_md.progress)
  81                ppc_md.progress("mpc834x_mds_setup_arch()", 0);
  82
  83        mpc83xx_setup_pci();
  84
  85        mpc834xemds_usb_cfg();
  86}
  87
  88machine_device_initcall(mpc834x_mds, mpc83xx_declare_of_platform_devices);
  89
  90/*
  91 * Called very early, MMU is off, device-tree isn't unflattened
  92 */
  93static int __init mpc834x_mds_probe(void)
  94{
  95        unsigned long root = of_get_flat_dt_root();
  96
  97        return of_flat_dt_is_compatible(root, "MPC834xMDS");
  98}
  99
 100define_machine(mpc834x_mds) {
 101        .name                   = "MPC834x MDS",
 102        .probe                  = mpc834x_mds_probe,
 103        .setup_arch             = mpc834x_mds_setup_arch,
 104        .init_IRQ               = mpc83xx_ipic_init_IRQ,
 105        .get_irq                = ipic_get_irq,
 106        .restart                = mpc83xx_restart,
 107        .time_init              = mpc83xx_time_init,
 108        .calibrate_decr         = generic_calibrate_decr,
 109        .progress               = udbg_progress,
 110};
 111