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 #include <sysdev/fsl_pci.h>
  39
  40 #include "mpc83xx.h"
  41
  42 #define BCSR5_INT_USB           0x02
  43 static 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, res.end - res.start + 1);
  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  */
  78 static void __init mpc834x_mds_setup_arch(void)
  79 {
  80 #ifdef CONFIG_PCI
  81         struct device_node *np;
  82 #endif
  83
  84         if (ppc_md.progress)
  85                 ppc_md.progress("mpc834x_mds_setup_arch()", 0);
  86
  87 #ifdef CONFIG_PCI
  88         for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
  89                 mpc83xx_add_bridge(np);
  90 #endif
  91
  92         mpc834xemds_usb_cfg();
  93 }
  94
  95 static void __init mpc834x_mds_init_IRQ(void)
  96 {
  97         struct device_node *np;
  98
  99         np = of_find_node_by_type(NULL, "ipic");
 100         if (!np)
 101                 return;
 102
 103         ipic_init(np, 0);
 104
 105         /* Initialize the default interrupt mapping priorities,
 106          * in case the boot rom changed something on us.
 107          */
 108         ipic_set_default_priority();
 109 }
 110
 111 static struct of_device_id mpc834x_ids[] = {
 112         { .type = "soc", },
 113         { .compatible = "soc", },
 114         { .compatible = "simple-bus", },
 115         { .compatible = "gianfar", },
 116         {},
 117 };
 118
 119 static int __init mpc834x_declare_of_platform_devices(void)
 120 {
 121         of_platform_bus_probe(NULL, mpc834x_ids, NULL);
 122         return 0;
 123 }
 124 machine_device_initcall(mpc834x_mds, mpc834x_declare_of_platform_devices);
 125
 126 /*
 127  * Called very early, MMU is off, device-tree isn't unflattened
 128  */
 129 static int __init mpc834x_mds_probe(void)
 130 {
 131         unsigned long root = of_get_flat_dt_root();
 132
 133         return of_flat_dt_is_compatible(root, "MPC834xMDS");
 134 }
 135
 136 define_machine(mpc834x_mds) {
 137         .name                   = "MPC834x MDS",
 138         .probe                  = mpc834x_mds_probe,
 139         .setup_arch             = mpc834x_mds_setup_arch,
 140         .init_IRQ               = mpc834x_mds_init_IRQ,
 141         .get_irq                = ipic_get_irq,
 142         .restart                = mpc83xx_restart,
 143         .time_init              = mpc83xx_time_init,
 144         .calibrate_decr         = generic_calibrate_decr,
 145         .progress               = udbg_progress,
 146 };