1/* $NetBSD: ar5315_board.c,v 1.3 2011/07/07 05:06:44 matt Exp $ */
2
3/*
4 * Copyright (c) 2006 Urbana-Champaign Independent Media Center.
5 * Copyright (c) 2006 Garrett D'Amore.
6 * All rights reserved.
7 *
8 * Portions of this code were written by Garrett D'Amore for the
9 * Champaign-Urbana Community Wireless Network Project.
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above
17 *    copyright notice, this list of conditions and the following
18 *    disclaimer in the documentation and/or other materials provided
19 *    with the distribution.
20 * 3. All advertising materials mentioning features or use of this
21 *    software must display the following acknowledgements:
22 *      This product includes software developed by the Urbana-Champaign
23 *      Independent Media Center.
24 *	This product includes software developed by Garrett D'Amore.
25 * 4. Urbana-Champaign Independent Media Center's name and Garrett
26 *    D'Amore's name may not be used to endorse or promote products
27 *    derived from this software without specific prior written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT
30 * MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR
31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
32 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED.  IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT
34 * MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT,
35 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43
44/*
45 * This file provides code to locate board-specific configuration and radio
46 * information data in flash for the AR5315.
47 */
48#include <sys/cdefs.h>
49__KERNEL_RCSID(0, "$NetBSD: ar5315_board.c,v 1.3 2011/07/07 05:06:44 matt Exp $");
50
51#include "opt_ddb.h"
52#include "opt_kgdb.h"
53
54#include "opt_memsize.h"
55#include <sys/param.h>
56#include <sys/systm.h>
57#include <sys/kernel.h>
58#include <sys/buf.h>
59
60#include <dev/cons.h>
61
62#include <mips/cache.h>
63#include <mips/locore.h>
64#include <mips/cpuregs.h>
65
66#include <net/if.h>
67#include <net/if_ether.h>
68
69#include <ah_soc.h>	/* XXX really doesn't belong in hal */
70
71#include <mips/atheros/include/ar5315reg.h>
72#include <mips/atheros/include/arbusvar.h>
73#include <mips/atheros/include/platform.h>
74
75#include <mips/locore.h>
76#include "com.h"
77
78/*
79 * Locate the Board Configuration data using heuristics.
80 * Search backward from the (aliased) end of flash looking
81 * for the signature string that marks the start of the data.
82 * We search at most 500KB.
83 */
84static const struct ar531x_boarddata *
85ar5315_get_board_info(void)
86{
87	static const struct ar531x_boarddata *board = NULL;
88	const uint8_t *ptr, *end;
89
90	if (board == NULL) {
91
92		/* search backward in the flash looking for the signature */
93		ptr = (const uint8_t *) MIPS_PHYS_TO_KSEG1(AR5315_CONFIG_END
94		    - 0x1000);
95		end = (const uint8_t *)AR5315_CONFIG_BASE;
96		/* XXX validate end */
97		for (; ptr > end; ptr -= 0x1000)
98			if (*(const uint32_t *)ptr == AR531X_BD_MAGIC) {
99				board = (const struct ar531x_boarddata *) ptr;
100				break;
101			}
102	}
103	return board;
104}
105
106/*
107 * Locate the radio configuration data; it is located relative to the
108 * board configuration data.
109 */
110static const void *
111ar5315_get_radio_info(void)
112{
113	static const void *radio = NULL;
114	const struct ar531x_boarddata *board;
115	const uint8_t *baddr, *ptr, *end;
116
117	if (radio)
118		goto done;
119
120	board = ar5315_get_board_info();
121	if (board == NULL)
122		return NULL;
123	baddr = (const uint8_t *) board;
124	end = (const uint8_t *)MIPS_PHYS_TO_KSEG1(AR5315_RADIO_END);
125
126	for (ptr = baddr + 0x1000; ptr < end; ptr += 0x1000)
127		if (*(const uint32_t *)ptr != 0xffffffffU) {
128			radio = ptr;
129			goto done;
130		}
131
132	/* AR2316 moves radio data */
133	for (ptr = baddr + 0xf8; ptr < end; ptr += 0x1000)
134		if (*(const uint32_t *)ptr != 0xffffffffU) {
135			radio = ptr;
136			goto done;
137		}
138
139done:
140	return radio;
141}
142
143const struct atheros_boardsw ar5315_boardsw = {
144	.absw_get_board_info = ar5315_get_board_info,
145	.absw_get_radio_info = ar5315_get_radio_info,
146};
147