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

   1 /*
   2  * arch/powerpc/platforms/83xx/mpc837x_rdb.c
   3  *
   4  * Copyright (C) 2007 Freescale Semiconductor, 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         mpc83xx_setup_arch();
  54         mpc837x_usb_cfg();
  55         mpc837x_rdb_sd_cfg();
  56 }
  57
  58 machine_device_initcall(mpc837x_rdb, mpc83xx_declare_of_platform_devices);
  59
  60 static const char * const board[] __initconst = {
  61         "fsl,mpc8377rdb",
  62         "fsl,mpc8378rdb",
  63         "fsl,mpc8379rdb",
  64         "fsl,mpc8377wlan",
  65         NULL
  66 };
  67
  68 /*
  69  * Called very early, MMU is off, device-tree isn't unflattened
  70  */
  71 static int __init mpc837x_rdb_probe(void)
  72 {
  73         return of_device_compatible_match(of_root, board);
  74 }
  75
  76 define_machine(mpc837x_rdb) {
  77         .name                   = "MPC837x RDB/WLAN",
  78         .probe                  = mpc837x_rdb_probe,
  79         .setup_arch             = mpc837x_rdb_setup_arch,
  80         .init_IRQ               = mpc83xx_ipic_init_IRQ,
  81         .get_irq                = ipic_get_irq,
  82         .restart                = mpc83xx_restart,
  83         .time_init              = mpc83xx_time_init,
  84         .calibrate_decr         = generic_calibrate_decr,
  85         .progress               = udbg_progress,
  86 };