LXR linux/arch/powerpc/platforms/83xx/mpc834x

   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
  27#include <asm/system.h>
  28#include <asm/atomic.h>
  29#include <asm/time.h>
  30#include <asm/io.h>
  31#include <asm/machdep.h>
  32#include <asm/ipic.h>
  33#include <asm/irq.h>
  34#include <asm/prom.h>
  35#include <asm/udbg.h>
  36#include <sysdev/fsl_soc.h>
  37
  38#include "mpc83xx.h"
  39
  40#define BCSR5_INT_USB           0x02
  41static int mpc834xemds_usb_cfg(void)
  42{
  43        struct device_node *np;
  44        void __iomem *bcsr_regs = NULL;
  45        u8 bcsr5;
  46
  47        mpc834x_usb_cfg();
  48        /* Map BCSR area */
  49        np = of_find_node_by_name(NULL, "bcsr");
  50        if (np) {
  51                struct resource res;
  52
  53                of_address_to_resource(np, 0, &res);
  54                bcsr_regs = ioremap(res.start, res.end - res.start + 1);
  55                of_node_put(np);
  56        }
  57        if (!bcsr_regs)
  58                return -1;
  59
  60        /*
  61         * if Processor Board is plugged into PIB board,
  62         * force to use the PHY on Processor Board
  63         */
  64        bcsr5 = in_8(bcsr_regs + 5);
  65        if (!(bcsr5 & BCSR5_INT_USB))
  66                out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
  67        iounmap(bcsr_regs);
  68        return 0;
  69}
  70
  71/* ************************************************************************
  72 *
  73 * Setup the architecture
  74 *
  75 */
  76static void __init mpc834x_mds_setup_arch(void)
  77{
  78#ifdef CONFIG_PCI
  79        struct device_node *np;
  80#endif
  81
  82        if (ppc_md.progress)
  83                ppc_md.progress("mpc834x_mds_setup_arch()", 0);
  84
  85#ifdef CONFIG_PCI
  86        for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
  87                mpc83xx_add_bridge(np);
  88#endif
  89
  90        mpc834xemds_usb_cfg();
  91}
  92
  93static void __init mpc834x_mds_init_IRQ(void)
  94{
  95        struct device_node *np;
  96
  97        np = of_find_node_by_type(NULL, "ipic");
  98        if (!np)
  99                return;
 100
 101        ipic_init(np, 0);
 102
 103        /* Initialize the default interrupt mapping priorities,
 104         * in case the boot rom changed something on us.
 105         */
 106        ipic_set_default_priority();
 107}
 108
 109/*
 110 * Called very early, MMU is off, device-tree isn't unflattened
 111 */
 112static int __init mpc834x_mds_probe(void)
 113{
 114        unsigned long root = of_get_flat_dt_root();
 115
 116        return of_flat_dt_is_compatible(root, "MPC834xMDS");
 117}
 118
 119define_machine(mpc834x_mds) {
 120        .name                   = "MPC834x MDS",
 121        .probe                  = mpc834x_mds_probe,
 122        .setup_arch             = mpc834x_mds_setup_arch,
 123        .init_IRQ               = mpc834x_mds_init_IRQ,
 124        .get_irq                = ipic_get_irq,
 125        .restart                = mpc83xx_restart,
 126        .time_init              = mpc83xx_time_init,
 127        .calibrate_decr         = generic_calibrate_decr,
 128        .progress               = udbg_progress,
 129};
 130