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
  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
  41 static 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  */
  76 static 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
  93 static 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  */
 112 static 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
 119 define_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 };