arch/powerpc/platforms/83xx/mpc834x_mds.c

   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 <asm/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
  39 #include "mpc83xx.h"
  40
  41 #define BCSR5_INT_USB           0x02
  42 static int mpc834xemds_usb_cfg(void)
  43 {
  44         struct device_node *np;
  45         void __iomem *bcsr_regs = NULL;
  46         u8 bcsr5;
  47
  48         mpc834x_usb_cfg();
  49         /* Map BCSR area */
  50         np = of_find_node_by_name(NULL, "bcsr");
  51         if (np) {
  52                 struct resource res;
  53
  54                 of_address_to_resource(np, 0, &res);
  55                 bcsr_regs = ioremap(res.start, res.end - res.start + 1);
  56                 of_node_put(np);
  57         }
  58         if (!bcsr_regs)
  59                 return -1;
  60
  61         /*
  62          * if Processor Board is plugged into PIB board,
  63          * force to use the PHY on Processor Board
  64          */
  65         bcsr5 = in_8(bcsr_regs + 5);
  66         if (!(bcsr5 & BCSR5_INT_USB))
  67                 out_8(bcsr_regs + 5, (bcsr5 | BCSR5_INT_USB));
  68         iounmap(bcsr_regs);
  69         return 0;
  70 }
  71
  72 /* ************************************************************************
  73  *
  74  * Setup the architecture
  75  *
  76  */
  77 static void __init mpc834x_mds_setup_arch(void)
  78 {
  79 #ifdef CONFIG_PCI
  80         struct device_node *np;
  81 #endif
  82
  83         if (ppc_md.progress)
  84                 ppc_md.progress("mpc834x_mds_setup_arch()", 0);
  85
  86 #ifdef CONFIG_PCI
  87         for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
  88                 mpc83xx_add_bridge(np);
  89 #endif
  90
  91         mpc834xemds_usb_cfg();
  92 }
  93
  94 static void __init mpc834x_mds_init_IRQ(void)
  95 {
  96         struct device_node *np;
  97
  98         np = of_find_node_by_type(NULL, "ipic");
  99         if (!np)
 100                 return;
 101
 102         ipic_init(np, 0);
 103
 104         /* Initialize the default interrupt mapping priorities,
 105          * in case the boot rom changed something on us.
 106          */
 107         ipic_set_default_priority();
 108 }
 109
 110 static struct of_device_id mpc834x_ids[] = {
 111         { .type = "soc", },
 112         { .compatible = "soc", },
 113         {},
 114 };
 115
 116 static int __init mpc834x_declare_of_platform_devices(void)
 117 {
 118         of_platform_bus_probe(NULL, mpc834x_ids, NULL);
 119         return 0;
 120 }
 121 machine_device_initcall(mpc834x_mds, mpc834x_declare_of_platform_devices);
 122
 123 /*
 124  * Called very early, MMU is off, device-tree isn't unflattened
 125  */
 126 static int __init mpc834x_mds_probe(void)
 127 {
 128         unsigned long root = of_get_flat_dt_root();
 129
 130         return of_flat_dt_is_compatible(root, "MPC834xMDS");
 131 }
 132
 133 define_machine(mpc834x_mds) {
 134         .name                   = "MPC834x MDS",
 135         .probe                  = mpc834x_mds_probe,
 136         .setup_arch             = mpc834x_mds_setup_arch,
 137         .init_IRQ               = mpc834x_mds_init_IRQ,
 138         .get_irq                = ipic_get_irq,
 139         .restart                = mpc83xx_restart,
 140         .time_init              = mpc83xx_time_init,
 141         .calibrate_decr         = generic_calibrate_decr,
 142         .progress               = udbg_progress,
 143 };