arch/powerpc/platforms/83xx/mpc837x_rdb.c

   1 /*
   2  * arch/powerpc/platforms/83xx/mpc837x_rdb.c
   3  *
   4  * Copyright (C) 2007 Freescale Semicondutor, Inc. All rights reserved.
   5  *
   6  * MPC837x RDB board specific routines
   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/pci.h>
  15 #include <linux/of_platform.h>
  16
  17 #include <asm/time.h>
  18 #include <asm/ipic.h>
  19 #include <asm/udbg.h>
  20 #include <sysdev/fsl_soc.h>
  21 #include <sysdev/fsl_pci.h>
  22
  23 #include "mpc83xx.h"
  24
  25 static void mpc837x_rdb_sd_cfg(void)
  26 {
  27         void __iomem *im;
  28
  29         im = ioremap(get_immrbase(), 0x1000);
  30         if (!im) {
  31                 WARN_ON(1);
  32                 return;
  33         }
  34
  35         /*
  36          * On RDB boards (in contrast to MDS) USBB pins are used for SD only,
  37          * so we can safely mux them away from the USB block.
  38          */
  39         clrsetbits_be32(im + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USBB_MASK,
  40                                                  MPC837X_SICRL_SD);
  41         clrsetbits_be32(im + MPC83XX_SICRH_OFFS, MPC837X_SICRH_SPI_MASK,
  42                                                  MPC837X_SICRH_SD);
  43         iounmap(im);
  44 }
  45
  46 /* ************************************************************************
  47  *
  48  * Setup the architecture
  49  *
  50  */
  51 static void __init mpc837x_rdb_setup_arch(void)
  52 {
  53 #ifdef CONFIG_PCI
  54         struct device_node *np;
  55 #endif
  56
  57         if (ppc_md.progress)
  58                 ppc_md.progress("mpc837x_rdb_setup_arch()", 0);
  59
  60 #ifdef CONFIG_PCI
  61         for_each_compatible_node(np, "pci", "fsl,mpc8349-pci")
  62                 mpc83xx_add_bridge(np);
  63         for_each_compatible_node(np, "pci", "fsl,mpc8314-pcie")
  64                 mpc83xx_add_bridge(np);
  65 #endif
  66         mpc837x_usb_cfg();
  67         mpc837x_rdb_sd_cfg();
  68 }
  69
  70 static struct of_device_id mpc837x_ids[] = {
  71         { .type = "soc", },
  72         { .compatible = "soc", },
  73         { .compatible = "simple-bus", },
  74         { .compatible = "gianfar", },
  75         { .compatible = "gpio-leds", },
  76         {},
  77 };
  78
  79 static int __init mpc837x_declare_of_platform_devices(void)
  80 {
  81         /* Publish of_device */
  82         of_platform_bus_probe(NULL, mpc837x_ids, NULL);
  83
  84         return 0;
  85 }
  86 machine_device_initcall(mpc837x_rdb, mpc837x_declare_of_platform_devices);
  87
  88 static void __init mpc837x_rdb_init_IRQ(void)
  89 {
  90         struct device_node *np;
  91
  92         np = of_find_compatible_node(NULL, NULL, "fsl,ipic");
  93         if (!np)
  94                 return;
  95
  96         ipic_init(np, 0);
  97
  98         /* Initialize the default interrupt mapping priorities,
  99          * in case the boot rom changed something on us.
 100          */
 101         ipic_set_default_priority();
 102 }
 103
 104 /*
 105  * Called very early, MMU is off, device-tree isn't unflattened
 106  */
 107 static int __init mpc837x_rdb_probe(void)
 108 {
 109         unsigned long root = of_get_flat_dt_root();
 110
 111         return of_flat_dt_is_compatible(root, "fsl,mpc8377rdb") ||
 112                of_flat_dt_is_compatible(root, "fsl,mpc8378rdb") ||
 113                of_flat_dt_is_compatible(root, "fsl,mpc8379rdb") ||
 114                of_flat_dt_is_compatible(root, "fsl,mpc8377wlan");
 115 }
 116
 117 define_machine(mpc837x_rdb) {
 118         .name                   = "MPC837x RDB/WLAN",
 119         .probe                  = mpc837x_rdb_probe,
 120         .setup_arch             = mpc837x_rdb_setup_arch,
 121         .init_IRQ               = mpc837x_rdb_init_IRQ,
 122         .get_irq                = ipic_get_irq,
 123         .restart                = mpc83xx_restart,
 124         .time_init              = mpc83xx_time_init,
 125         .calibrate_decr         = generic_calibrate_decr,
 126         .progress               = udbg_progress,
 127 };