1 /*
2 * Copyright (c) 2010 Broadcom Corporation
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
11 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
13 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
14 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include <linux/slab.h>
18 #include <net/mac80211.h>
19
20 #include "types.h"
21 #include "main.h"
22 #include "phy_shim.h"
23 #include "antsel.h"
24
25 #define ANT_SELCFG_AUTO 0x80 /* bit indicates antenna sel AUTO */
26 #define ANT_SELCFG_MASK 0x33 /* antenna configuration mask */
27 #define ANT_SELCFG_TX_UNICAST 0 /* unicast tx antenna configuration */
28 #define ANT_SELCFG_RX_UNICAST 1 /* unicast rx antenna configuration */
29 #define ANT_SELCFG_TX_DEF 2 /* default tx antenna configuration */
30 #define ANT_SELCFG_RX_DEF 3 /* default rx antenna configuration */
31
32 /* useful macros */
33 #define BRCMS_ANTSEL_11N_0(ant) ((((ant) & ANT_SELCFG_MASK) >> 4) & 0xf)
34 #define BRCMS_ANTSEL_11N_1(ant) (((ant) & ANT_SELCFG_MASK) & 0xf)
35 #define BRCMS_ANTIDX_11N(ant) (((BRCMS_ANTSEL_11N_0(ant)) << 2) +\
36 (BRCMS_ANTSEL_11N_1(ant)))
37 #define BRCMS_ANT_ISAUTO_11N(ant) (((ant) & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO)
38 #define BRCMS_ANTSEL_11N(ant) ((ant) & ANT_SELCFG_MASK)
39
40 /* antenna switch */
41 /* defines for no boardlevel antenna diversity */
42 #define ANT_SELCFG_DEF_2x2 0x01 /* default antenna configuration */
43
44 /* 2x3 antdiv defines and tables for GPIO communication */
45 #define ANT_SELCFG_NUM_2x3 3
46 #define ANT_SELCFG_DEF_2x3 0x01 /* default antenna configuration */
47
48 /* 2x4 antdiv rev4 defines and tables for GPIO communication */
49 #define ANT_SELCFG_NUM_2x4 4
50 #define ANT_SELCFG_DEF_2x4 0x02 /* default antenna configuration */
51
52 static const u16 mimo_2x4_div_antselpat_tbl[] = {
53 0, 0, 0x9, 0xa, /* ant0: 0 ant1: 2,3 */
54 0, 0, 0x5, 0x6, /* ant0: 1 ant1: 2,3 */
55 0, 0, 0, 0, /* n.a. */
56 0, 0, 0, 0 /* n.a. */
57 };
58
59 static const u8 mimo_2x4_div_antselid_tbl[16] = {
60 0, 0, 0, 0, 0, 2, 3, 0,
61 0, 0, 1, 0, 0, 0, 0, 0 /* pat to antselid */
62 };
63
64 static const u16 mimo_2x3_div_antselpat_tbl[] = {
65 16, 0, 1, 16, /* ant0: 0 ant1: 1,2 */
66 16, 16, 16, 16, /* n.a. */
67 16, 2, 16, 16, /* ant0: 2 ant1: 1 */
68 16, 16, 16, 16 /* n.a. */
69 };
70
71 static const u8 mimo_2x3_div_antselid_tbl[16] = {
72 0, 1, 2, 0, 0, 0, 0, 0,
73 0, 0, 0, 0, 0, 0, 0, 0 /* pat to antselid */
74 };
75
76 /* boardlevel antenna selection: init antenna selection structure */
77 static void
brcms_c_antsel_init_cfg(struct antsel_info * asi,struct brcms_antselcfg * antsel,bool auto_sel)78 brcms_c_antsel_init_cfg(struct antsel_info *asi, struct brcms_antselcfg *antsel,
79 bool auto_sel)
80 {
81 if (asi->antsel_type == ANTSEL_2x3) {
82 u8 antcfg_def = ANT_SELCFG_DEF_2x3 |
83 ((asi->antsel_avail && auto_sel) ? ANT_SELCFG_AUTO : 0);
84 antsel->ant_config[ANT_SELCFG_TX_DEF] = antcfg_def;
85 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = antcfg_def;
86 antsel->ant_config[ANT_SELCFG_RX_DEF] = antcfg_def;
87 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = antcfg_def;
88 antsel->num_antcfg = ANT_SELCFG_NUM_2x3;
89
90 } else if (asi->antsel_type == ANTSEL_2x4) {
91
92 antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x4;
93 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x4;
94 antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x4;
95 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x4;
96 antsel->num_antcfg = ANT_SELCFG_NUM_2x4;
97
98 } else { /* no antenna selection available */
99
100 antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x2;
101 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x2;
102 antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x2;
103 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x2;
104 antsel->num_antcfg = 0;
105 }
106 }
107
brcms_c_antsel_attach(struct brcms_c_info * wlc)108 struct antsel_info *brcms_c_antsel_attach(struct brcms_c_info *wlc)
109 {
110 struct antsel_info *asi;
111 struct si_pub *sih = wlc->hw->sih;
112
113 asi = kzalloc(sizeof(struct antsel_info), GFP_ATOMIC);
114 if (!asi)
115 return NULL;
116
117 asi->wlc = wlc;
118 asi->pub = wlc->pub;
119 asi->antsel_type = ANTSEL_NA;
120 asi->antsel_avail = false;
121 asi->antsel_antswitch = (u8) getintvar(sih, BRCMS_SROM_ANTSWITCH);
122
123 if ((asi->pub->sromrev >= 4) && (asi->antsel_antswitch != 0)) {
124 switch (asi->antsel_antswitch) {
125 case ANTSWITCH_TYPE_1:
126 case ANTSWITCH_TYPE_2:
127 case ANTSWITCH_TYPE_3:
128 /* 4321/2 board with 2x3 switch logic */
129 asi->antsel_type = ANTSEL_2x3;
130 /* Antenna selection availability */
131 if (((u16) getintvar(sih, BRCMS_SROM_AA2G) == 7) ||
132 ((u16) getintvar(sih, BRCMS_SROM_AA5G) == 7)) {
133 asi->antsel_avail = true;
134 } else if (
135 (u16) getintvar(sih, BRCMS_SROM_AA2G) == 3 ||
136 (u16) getintvar(sih, BRCMS_SROM_AA5G) == 3) {
137 asi->antsel_avail = false;
138 } else {
139 asi->antsel_avail = false;
140 wiphy_err(wlc->wiphy, "antsel_attach: 2o3 "
141 "board cfg invalid\n");
142 }
143
144 break;
145 default:
146 break;
147 }
148 } else if ((asi->pub->sromrev == 4) &&
149 ((u16) getintvar(sih, BRCMS_SROM_AA2G) == 7) &&
150 ((u16) getintvar(sih, BRCMS_SROM_AA5G) == 0)) {
151 /* hack to match old 4321CB2 cards with 2of3 antenna switch */
152 asi->antsel_type = ANTSEL_2x3;
153 asi->antsel_avail = true;
154 } else if (asi->pub->boardflags2 & BFL2_2X4_DIV) {
155 asi->antsel_type = ANTSEL_2x4;
156 asi->antsel_avail = true;
157 }
158
159 /* Set the antenna selection type for the low driver */
160 brcms_b_antsel_type_set(wlc->hw, asi->antsel_type);
161
162 /* Init (auto/manual) antenna selection */
163 brcms_c_antsel_init_cfg(asi, &asi->antcfg_11n, true);
164 brcms_c_antsel_init_cfg(asi, &asi->antcfg_cur, true);
165
166 return asi;
167 }
168
brcms_c_antsel_detach(struct antsel_info * asi)169 void brcms_c_antsel_detach(struct antsel_info *asi)
170 {
171 kfree(asi);
172 }
173
174 /*
175 * boardlevel antenna selection:
176 * convert ant_cfg to mimo_antsel (ucode interface)
177 */
brcms_c_antsel_antcfg2antsel(struct antsel_info * asi,u8 ant_cfg)178 static u16 brcms_c_antsel_antcfg2antsel(struct antsel_info *asi, u8 ant_cfg)
179 {
180 u8 idx = BRCMS_ANTIDX_11N(BRCMS_ANTSEL_11N(ant_cfg));
181 u16 mimo_antsel = 0;
182
183 if (asi->antsel_type == ANTSEL_2x4) {
184 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
185 mimo_antsel = (mimo_2x4_div_antselpat_tbl[idx] & 0xf);
186 return mimo_antsel;
187
188 } else if (asi->antsel_type == ANTSEL_2x3) {
189 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
190 mimo_antsel = (mimo_2x3_div_antselpat_tbl[idx] & 0xf);
191 return mimo_antsel;
192 }
193
194 return mimo_antsel;
195 }
196
197 /* boardlevel antenna selection: ucode interface control */
brcms_c_antsel_cfgupd(struct antsel_info * asi,struct brcms_antselcfg * antsel)198 static int brcms_c_antsel_cfgupd(struct antsel_info *asi,
199 struct brcms_antselcfg *antsel)
200 {
201 struct brcms_c_info *wlc = asi->wlc;
202 u8 ant_cfg;
203 u16 mimo_antsel;
204
205 /* 1) Update TX antconfig for all frames that are not unicast data
206 * (aka default TX)
207 */
208 ant_cfg = antsel->ant_config[ANT_SELCFG_TX_DEF];
209 mimo_antsel = brcms_c_antsel_antcfg2antsel(asi, ant_cfg);
210 brcms_b_write_shm(wlc->hw, M_MIMO_ANTSEL_TXDFLT, mimo_antsel);
211 /*
212 * Update driver stats for currently selected
213 * default tx/rx antenna config
214 */
215 asi->antcfg_cur.ant_config[ANT_SELCFG_TX_DEF] = ant_cfg;
216
217 /* 2) Update RX antconfig for all frames that are not unicast data
218 * (aka default RX)
219 */
220 ant_cfg = antsel->ant_config[ANT_SELCFG_RX_DEF];
221 mimo_antsel = brcms_c_antsel_antcfg2antsel(asi, ant_cfg);
222 brcms_b_write_shm(wlc->hw, M_MIMO_ANTSEL_RXDFLT, mimo_antsel);
223 /*
224 * Update driver stats for currently selected
225 * default tx/rx antenna config
226 */
227 asi->antcfg_cur.ant_config[ANT_SELCFG_RX_DEF] = ant_cfg;
228
229 return 0;
230 }
231
brcms_c_antsel_init(struct antsel_info * asi)232 void brcms_c_antsel_init(struct antsel_info *asi)
233 {
234 if ((asi->antsel_type == ANTSEL_2x3) ||
235 (asi->antsel_type == ANTSEL_2x4))
236 brcms_c_antsel_cfgupd(asi, &asi->antcfg_11n);
237 }
238
239 /* boardlevel antenna selection: convert id to ant_cfg */
brcms_c_antsel_id2antcfg(struct antsel_info * asi,u8 id)240 static u8 brcms_c_antsel_id2antcfg(struct antsel_info *asi, u8 id)
241 {
242 u8 antcfg = ANT_SELCFG_DEF_2x2;
243
244 if (asi->antsel_type == ANTSEL_2x4) {
245 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
246 antcfg = (((id & 0x2) << 3) | ((id & 0x1) + 2));
247 return antcfg;
248
249 } else if (asi->antsel_type == ANTSEL_2x3) {
250 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
251 antcfg = (((id & 0x02) << 4) | ((id & 0x1) + 1));
252 return antcfg;
253 }
254
255 return antcfg;
256 }
257
258 void
brcms_c_antsel_antcfg_get(struct antsel_info * asi,bool usedef,bool sel,u8 antselid,u8 fbantselid,u8 * antcfg,u8 * fbantcfg)259 brcms_c_antsel_antcfg_get(struct antsel_info *asi, bool usedef, bool sel,
260 u8 antselid, u8 fbantselid, u8 *antcfg,
261 u8 *fbantcfg)
262 {
263 u8 ant;
264
265 /* if use default, assign it and return */
266 if (usedef) {
267 *antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_DEF];
268 *fbantcfg = *antcfg;
269 return;
270 }
271
272 if (!sel) {
273 *antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
274 *fbantcfg = *antcfg;
275
276 } else {
277 ant = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
278 if ((ant & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO) {
279 *antcfg = brcms_c_antsel_id2antcfg(asi, antselid);
280 *fbantcfg = brcms_c_antsel_id2antcfg(asi, fbantselid);
281 } else {
282 *antcfg =
283 asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
284 *fbantcfg = *antcfg;
285 }
286 }
287 return;
288 }
289
290 /* boardlevel antenna selection: convert mimo_antsel (ucode interface) to id */
brcms_c_antsel_antsel2id(struct antsel_info * asi,u16 antsel)291 u8 brcms_c_antsel_antsel2id(struct antsel_info *asi, u16 antsel)
292 {
293 u8 antselid = 0;
294
295 if (asi->antsel_type == ANTSEL_2x4) {
296 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
297 antselid = mimo_2x4_div_antselid_tbl[(antsel & 0xf)];
298 return antselid;
299
300 } else if (asi->antsel_type == ANTSEL_2x3) {
301 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
302 antselid = mimo_2x3_div_antselid_tbl[(antsel & 0xf)];
303 return antselid;
304 }
305
306 return antselid;
307 }
308