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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[],
45 	__dtb_xlp_fvp_begin[], __dtb_xlp_gvp_begin[];
46 static void *xlp_fdt_blob;
47 
xlp_dt_init(void * fdtp)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_GVP
53 		case PRID_IMP_NETLOGIC_XLP9XX:
54 		case PRID_IMP_NETLOGIC_XLP5XX:
55 			fdtp = __dtb_xlp_gvp_begin;
56 			break;
57 #endif
58 #ifdef CONFIG_DT_XLP_FVP
59 		case PRID_IMP_NETLOGIC_XLP2XX:
60 			fdtp = __dtb_xlp_fvp_begin;
61 			break;
62 #endif
63 #ifdef CONFIG_DT_XLP_SVP
64 		case PRID_IMP_NETLOGIC_XLP3XX:
65 			fdtp = __dtb_xlp_svp_begin;
66 			break;
67 #endif
68 #ifdef CONFIG_DT_XLP_EVP
69 		case PRID_IMP_NETLOGIC_XLP8XX:
70 			fdtp = __dtb_xlp_evp_begin;
71 			break;
72 #endif
73 		default:
74 			/* Pick a built-in if any, and hope for the best */
75 			fdtp = __dtb_start;
76 			break;
77 		}
78 	}
79 	xlp_fdt_blob = fdtp;
80 	return fdtp;
81 }
82 
xlp_early_init_devtree(void)83 void __init xlp_early_init_devtree(void)
84 {
85 	__dt_setup_arch(xlp_fdt_blob);
86 	strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
87 }
88 
device_tree_init(void)89 void __init device_tree_init(void)
90 {
91 	unflatten_and_copy_device_tree();
92 }
93 
94 static struct of_device_id __initdata xlp_ids[] = {
95 	{ .compatible = "simple-bus", },
96 	{},
97 };
98 
xlp8xx_ds_publish_devices(void)99 int __init xlp8xx_ds_publish_devices(void)
100 {
101 	if (!of_have_populated_dt())
102 		return 0;
103 	return of_platform_bus_probe(NULL, xlp_ids, NULL);
104 }
105 
106 device_initcall(xlp8xx_ds_publish_devices);
107