arch/mips/netlogic/xlp/dt.c

   1 /*
   2  * Copyright 2003-2013 Broadcom Corporation.
   3  * All Rights Reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the Broadcom
   9  * license below:
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  *
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in
  19  *    the documentation and/or other materials provided with the
  20  *    distribution.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  29  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  31  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  32  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <linux/kernel.h>
  36 #include <linux/bootmem.h>
  37
  38 #include <linux/of_fdt.h>
  39 #include <linux/of_platform.h>
  40 #include <linux/of_device.h>
  41
  42 #include <asm/prom.h>
  43
  44 extern u32 __dtb_xlp_evp_begin[], __dtb_xlp_svp_begin[], __dtb_xlp_fvp_begin[],
  45         __dtb_xlp_gvp_begin[], __dtb_xlp_rvp_begin[];
  46 static void *xlp_fdt_blob;
  47
  48 void __init *xlp_dt_init(void *fdtp)
  49 {
  50         if (!fdtp) {
  51                 switch (current_cpu_data.processor_id & PRID_IMP_MASK) {
  52 #ifdef CONFIG_DT_XLP_RVP
  53                 case PRID_IMP_NETLOGIC_XLP5XX:
  54                         fdtp = __dtb_xlp_rvp_begin;
  55                         break;
  56 #endif
  57 #ifdef CONFIG_DT_XLP_GVP
  58                 case PRID_IMP_NETLOGIC_XLP9XX:
  59                         fdtp = __dtb_xlp_gvp_begin;
  60                         break;
  61 #endif
  62 #ifdef CONFIG_DT_XLP_FVP
  63                 case PRID_IMP_NETLOGIC_XLP2XX:
  64                         fdtp = __dtb_xlp_fvp_begin;
  65                         break;
  66 #endif
  67 #ifdef CONFIG_DT_XLP_SVP
  68                 case PRID_IMP_NETLOGIC_XLP3XX:
  69                         fdtp = __dtb_xlp_svp_begin;
  70                         break;
  71 #endif
  72 #ifdef CONFIG_DT_XLP_EVP
  73                 case PRID_IMP_NETLOGIC_XLP8XX:
  74                         fdtp = __dtb_xlp_evp_begin;
  75                         break;
  76 #endif
  77                 default:
  78                         /* Pick a built-in if any, and hope for the best */
  79                         fdtp = __dtb_start;
  80                         break;
  81                 }
  82         }
  83         xlp_fdt_blob = fdtp;
  84         return fdtp;
  85 }
  86
  87 void __init xlp_early_init_devtree(void)
  88 {
  89         __dt_setup_arch(xlp_fdt_blob);
  90 }
  91
  92 void __init device_tree_init(void)
  93 {
  94         unflatten_and_copy_device_tree();
  95 }
  96
  97 static struct of_device_id __initdata xlp_ids[] = {
  98         { .compatible = "simple-bus", },
  99         {},
 100 };
 101
 102 int __init xlp8xx_ds_publish_devices(void)
 103 {
 104         if (!of_have_populated_dt())
 105                 return 0;
 106         return of_platform_bus_probe(NULL, xlp_ids, NULL);
 107 }
 108
 109 device_initcall(xlp8xx_ds_publish_devices);