1 /* $NetBSD: ar5312_board.c,v 1.5 2015/06/09 22:50:50 matt Exp $ */
2 /*
3 * Copyright (c) 2006 Urbana-Champaign Independent Media Center.
4 * Copyright (c) 2006 Garrett D'Amore.
5 * All rights reserved.
6 *
7 * This code was written by Garrett D'Amore for the Champaign-Urbana
8 * Community Wireless Network Project.
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following
17 * disclaimer in the documentation and/or other materials provided
18 * with the distribution.
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgements:
21 * This product includes software developed by the Urbana-Champaign
22 * Independent Media Center.
23 * This product includes software developed by Garrett D'Amore.
24 * 4. Urbana-Champaign Independent Media Center's name and Garrett
25 * D'Amore's name may not be used to endorse or promote products
26 * derived from this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT
29 * MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR
30 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
31 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32 * ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT
33 * MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT,
34 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
35 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
36 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
37 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
38 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
40 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 */
42 #include <sys/cdefs.h>
43 __KERNEL_RCSID(0, "$NetBSD: ar5312_board.c,v 1.5 2015/06/09 22:50:50 matt Exp $");
44
45 #include <sys/param.h>
46 #include <sys/bus.h>
47 #include <sys/device.h>
48 #include <sys/systm.h>
49
50 #include <mips/cpuregs.h>
51
52 #include <mips/atheros/include/ar5312reg.h>
53 #include <mips/atheros/include/platform.h>
54
55 #include <ah_soc.h>
56
57 extern const char *ether_sprintf(const uint8_t *);
58
59 /*
60 * Locate the Board Configuration data using heuristics.
61 * Search backward from the (aliased) end of flash looking
62 * for the signature string that marks the start of the data.
63 * We search at most 500KB.
64 */
65 static const struct ar531x_boarddata *
ar5312_get_board_info(void)66 ar5312_get_board_info(void)
67 {
68 static const struct ar531x_boarddata *board = NULL;
69 const uint8_t *ptr, *end;
70 uint32_t fctl;
71
72 if (board == NULL) {
73 /* configure flash bank 0 */
74 fctl = REGVAL(AR5312_FLASHCTL_BASE + AR5312_FLASHCTL_0) &
75 AR5312_FLASHCTL_MW;
76
77 fctl |=
78 AR5312_FLASHCTL_E |
79 AR5312_FLASHCTL_RBLE |
80 AR5312_FLASHCTL_AC_8M |
81 __SHIFTIN(1, AR5312_FLASHCTL_IDCY) |
82 __SHIFTIN(7, AR5312_FLASHCTL_WST1) |
83 __SHIFTIN(7, AR5312_FLASHCTL_WST2);
84
85 REGVAL(AR5312_FLASHCTL_BASE + AR5312_FLASHCTL_0) = fctl;
86
87 REGVAL(AR5312_FLASHCTL_BASE + AR5312_FLASHCTL_1) &=
88 ~(AR5312_FLASHCTL_E | AR5312_FLASHCTL_AC);
89
90 REGVAL(AR5312_FLASHCTL_BASE + AR5312_FLASHCTL_2) &=
91 ~(AR5312_FLASHCTL_E | AR5312_FLASHCTL_AC);
92
93 /* search backward in the flash looking for the signature */
94 ptr = (const uint8_t *) MIPS_PHYS_TO_KSEG1(AR5312_FLASH_END - 0x1000);
95 end = ptr - (500 * 1024); /* NB: max 500KB window */
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
108 * to the board configuration data.
109 */
110 static const void *
ar5312_get_radio_info(void)111 ar5312_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 == NULL) {
118 board = ar5312_get_board_info();
119 if (board == NULL)
120 return NULL;
121 baddr = (const uint8_t *) board;
122 ptr = baddr + 0x1000;
123 end = (const uint8_t *)
124 MIPS_PHYS_TO_KSEG1(AR5312_FLASH_END-0x1000);
125 again:
126 for (; ptr < end; ptr += 0x1000)
127 if (*(const uint32_t *)ptr != 0xffffffff) {
128 radio = ptr;
129 goto done;
130 }
131 /* sort of an Algol-style for loop ... */
132 if (end == (uint8_t *) MIPS_PHYS_TO_KSEG1(AR5312_FLASH_END)) {
133 /* NB: AR2316 has radio data in a different location */
134 ptr = baddr + 0xf8;
135 end = (const uint8_t *)
136 MIPS_PHYS_TO_KSEG1(AR5312_FLASH_END-0x1000 + 0xf8);
137 goto again;
138 }
139 }
140 done:
141 return radio;
142 }
143
144 const struct atheros_boardsw ar5312_boardsw = {
145 .absw_get_board_info = ar5312_get_board_info,
146 .absw_get_radio_info = ar5312_get_radio_info,
147 };
148