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 #include "debug.h"
25
26 #define ANT_SELCFG_AUTO 0x80 /* bit indicates antenna sel AUTO */
27 #define ANT_SELCFG_MASK 0x33 /* antenna configuration mask */
28 #define ANT_SELCFG_TX_UNICAST 0 /* unicast tx antenna configuration */
29 #define ANT_SELCFG_RX_UNICAST 1 /* unicast rx antenna configuration */
30 #define ANT_SELCFG_TX_DEF 2 /* default tx antenna configuration */
31 #define ANT_SELCFG_RX_DEF 3 /* default rx antenna configuration */
32
33 /* useful macros */
34 #define BRCMS_ANTSEL_11N_0(ant) ((((ant) & ANT_SELCFG_MASK) >> 4) & 0xf)
35 #define BRCMS_ANTSEL_11N_1(ant) (((ant) & ANT_SELCFG_MASK) & 0xf)
36 #define BRCMS_ANTIDX_11N(ant) (((BRCMS_ANTSEL_11N_0(ant)) << 2) +\
37 (BRCMS_ANTSEL_11N_1(ant)))
38 #define BRCMS_ANT_ISAUTO_11N(ant) (((ant) & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO)
39 #define BRCMS_ANTSEL_11N(ant) ((ant) & ANT_SELCFG_MASK)
40
41 /* antenna switch */
42 /* defines for no boardlevel antenna diversity */
43 #define ANT_SELCFG_DEF_2x2 0x01 /* default antenna configuration */
44
45 /* 2x3 antdiv defines and tables for GPIO communication */
46 #define ANT_SELCFG_NUM_2x3 3
47 #define ANT_SELCFG_DEF_2x3 0x01 /* default antenna configuration */
48
49 /* 2x4 antdiv rev4 defines and tables for GPIO communication */
50 #define ANT_SELCFG_NUM_2x4 4
51 #define ANT_SELCFG_DEF_2x4 0x02 /* default antenna configuration */
52
53 static const u16 mimo_2x4_div_antselpat_tbl[] = {
54 0, 0, 0x9, 0xa, /* ant0: 0 ant1: 2,3 */
55 0, 0, 0x5, 0x6, /* ant0: 1 ant1: 2,3 */
56 0, 0, 0, 0, /* n.a. */
57 0, 0, 0, 0 /* n.a. */
58 };
59
60 static const u8 mimo_2x4_div_antselid_tbl[16] = {
61 0, 0, 0, 0, 0, 2, 3, 0,
62 0, 0, 1, 0, 0, 0, 0, 0 /* pat to antselid */
63 };
64
65 static const u16 mimo_2x3_div_antselpat_tbl[] = {
66 16, 0, 1, 16, /* ant0: 0 ant1: 1,2 */
67 16, 16, 16, 16, /* n.a. */
68 16, 2, 16, 16, /* ant0: 2 ant1: 1 */
69 16, 16, 16, 16 /* n.a. */
70 };
71
72 static const u8 mimo_2x3_div_antselid_tbl[16] = {
73 0, 1, 2, 0, 0, 0, 0, 0,
74 0, 0, 0, 0, 0, 0, 0, 0 /* pat to antselid */
75 };
76
77 /* boardlevel antenna selection: init antenna selection structure */
78 static void
brcms_c_antsel_init_cfg(struct antsel_info * asi,struct brcms_antselcfg * antsel,bool auto_sel)79 brcms_c_antsel_init_cfg(struct antsel_info *asi, struct brcms_antselcfg *antsel,
80 bool auto_sel)
81 {
82 if (asi->antsel_type == ANTSEL_2x3) {
83 u8 antcfg_def = ANT_SELCFG_DEF_2x3 |
84 ((asi->antsel_avail && auto_sel) ? ANT_SELCFG_AUTO : 0);
85 antsel->ant_config[ANT_SELCFG_TX_DEF] = antcfg_def;
86 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = antcfg_def;
87 antsel->ant_config[ANT_SELCFG_RX_DEF] = antcfg_def;
88 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = antcfg_def;
89 antsel->num_antcfg = ANT_SELCFG_NUM_2x3;
90
91 } else if (asi->antsel_type == ANTSEL_2x4) {
92
93 antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x4;
94 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x4;
95 antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x4;
96 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x4;
97 antsel->num_antcfg = ANT_SELCFG_NUM_2x4;
98
99 } else { /* no antenna selection available */
100
101 antsel->ant_config[ANT_SELCFG_TX_DEF] = ANT_SELCFG_DEF_2x2;
102 antsel->ant_config[ANT_SELCFG_TX_UNICAST] = ANT_SELCFG_DEF_2x2;
103 antsel->ant_config[ANT_SELCFG_RX_DEF] = ANT_SELCFG_DEF_2x2;
104 antsel->ant_config[ANT_SELCFG_RX_UNICAST] = ANT_SELCFG_DEF_2x2;
105 antsel->num_antcfg = 0;
106 }
107 }
108
brcms_c_antsel_attach(struct brcms_c_info * wlc)109 struct antsel_info *brcms_c_antsel_attach(struct brcms_c_info *wlc)
110 {
111 struct antsel_info *asi;
112 struct ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom;
113
114 asi = kzalloc(sizeof(struct antsel_info), GFP_ATOMIC);
115 if (!asi)
116 return NULL;
117
118 asi->wlc = wlc;
119 asi->pub = wlc->pub;
120 asi->antsel_type = ANTSEL_NA;
121 asi->antsel_avail = false;
122 asi->antsel_antswitch = sprom->antswitch;
123
124 if ((asi->pub->sromrev >= 4) && (asi->antsel_antswitch != 0)) {
125 switch (asi->antsel_antswitch) {
126 case ANTSWITCH_TYPE_1:
127 case ANTSWITCH_TYPE_2:
128 case ANTSWITCH_TYPE_3:
129 /* 4321/2 board with 2x3 switch logic */
130 asi->antsel_type = ANTSEL_2x3;
131 /* Antenna selection availability */
132 if ((sprom->ant_available_bg == 7) ||
133 (sprom->ant_available_a == 7)) {
134 asi->antsel_avail = true;
135 } else if (
136 sprom->ant_available_bg == 3 ||
137 sprom->ant_available_a == 3) {
138 asi->antsel_avail = false;
139 } else {
140 asi->antsel_avail = false;
141 brcms_err(wlc->hw->d11core,
142 "antsel_attach: 2o3 "
143 "board cfg invalid\n");
144 }
145
146 break;
147 default:
148 break;
149 }
150 } else if ((asi->pub->sromrev == 4) &&
151 (sprom->ant_available_bg == 7) &&
152 (sprom->ant_available_a == 0)) {
153 /* hack to match old 4321CB2 cards with 2of3 antenna switch */
154 asi->antsel_type = ANTSEL_2x3;
155 asi->antsel_avail = true;
156 } else if (asi->pub->boardflags2 & BFL2_2X4_DIV) {
157 asi->antsel_type = ANTSEL_2x4;
158 asi->antsel_avail = true;
159 }
160
161 /* Set the antenna selection type for the low driver */
162 brcms_b_antsel_type_set(wlc->hw, asi->antsel_type);
163
164 /* Init (auto/manual) antenna selection */
165 brcms_c_antsel_init_cfg(asi, &asi->antcfg_11n, true);
166 brcms_c_antsel_init_cfg(asi, &asi->antcfg_cur, true);
167
168 return asi;
169 }
170
brcms_c_antsel_detach(struct antsel_info * asi)171 void brcms_c_antsel_detach(struct antsel_info *asi)
172 {
173 kfree(asi);
174 }
175
176 /*
177 * boardlevel antenna selection:
178 * convert ant_cfg to mimo_antsel (ucode interface)
179 */
brcms_c_antsel_antcfg2antsel(struct antsel_info * asi,u8 ant_cfg)180 static u16 brcms_c_antsel_antcfg2antsel(struct antsel_info *asi, u8 ant_cfg)
181 {
182 u8 idx = BRCMS_ANTIDX_11N(BRCMS_ANTSEL_11N(ant_cfg));
183 u16 mimo_antsel = 0;
184
185 if (asi->antsel_type == ANTSEL_2x4) {
186 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
187 mimo_antsel = (mimo_2x4_div_antselpat_tbl[idx] & 0xf);
188 return mimo_antsel;
189
190 } else if (asi->antsel_type == ANTSEL_2x3) {
191 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
192 mimo_antsel = (mimo_2x3_div_antselpat_tbl[idx] & 0xf);
193 return mimo_antsel;
194 }
195
196 return mimo_antsel;
197 }
198
199 /* boardlevel antenna selection: ucode interface control */
brcms_c_antsel_cfgupd(struct antsel_info * asi,struct brcms_antselcfg * antsel)200 static int brcms_c_antsel_cfgupd(struct antsel_info *asi,
201 struct brcms_antselcfg *antsel)
202 {
203 struct brcms_c_info *wlc = asi->wlc;
204 u8 ant_cfg;
205 u16 mimo_antsel;
206
207 /* 1) Update TX antconfig for all frames that are not unicast data
208 * (aka default TX)
209 */
210 ant_cfg = antsel->ant_config[ANT_SELCFG_TX_DEF];
211 mimo_antsel = brcms_c_antsel_antcfg2antsel(asi, ant_cfg);
212 brcms_b_write_shm(wlc->hw, M_MIMO_ANTSEL_TXDFLT, mimo_antsel);
213 /*
214 * Update driver stats for currently selected
215 * default tx/rx antenna config
216 */
217 asi->antcfg_cur.ant_config[ANT_SELCFG_TX_DEF] = ant_cfg;
218
219 /* 2) Update RX antconfig for all frames that are not unicast data
220 * (aka default RX)
221 */
222 ant_cfg = antsel->ant_config[ANT_SELCFG_RX_DEF];
223 mimo_antsel = brcms_c_antsel_antcfg2antsel(asi, ant_cfg);
224 brcms_b_write_shm(wlc->hw, M_MIMO_ANTSEL_RXDFLT, mimo_antsel);
225 /*
226 * Update driver stats for currently selected
227 * default tx/rx antenna config
228 */
229 asi->antcfg_cur.ant_config[ANT_SELCFG_RX_DEF] = ant_cfg;
230
231 return 0;
232 }
233
brcms_c_antsel_init(struct antsel_info * asi)234 void brcms_c_antsel_init(struct antsel_info *asi)
235 {
236 if ((asi->antsel_type == ANTSEL_2x3) ||
237 (asi->antsel_type == ANTSEL_2x4))
238 brcms_c_antsel_cfgupd(asi, &asi->antcfg_11n);
239 }
240
241 /* boardlevel antenna selection: convert id to ant_cfg */
brcms_c_antsel_id2antcfg(struct antsel_info * asi,u8 id)242 static u8 brcms_c_antsel_id2antcfg(struct antsel_info *asi, u8 id)
243 {
244 u8 antcfg = ANT_SELCFG_DEF_2x2;
245
246 if (asi->antsel_type == ANTSEL_2x4) {
247 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
248 antcfg = (((id & 0x2) << 3) | ((id & 0x1) + 2));
249 return antcfg;
250
251 } else if (asi->antsel_type == ANTSEL_2x3) {
252 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
253 antcfg = (((id & 0x02) << 4) | ((id & 0x1) + 1));
254 return antcfg;
255 }
256
257 return antcfg;
258 }
259
260 void
brcms_c_antsel_antcfg_get(struct antsel_info * asi,bool usedef,bool sel,u8 antselid,u8 fbantselid,u8 * antcfg,u8 * fbantcfg)261 brcms_c_antsel_antcfg_get(struct antsel_info *asi, bool usedef, bool sel,
262 u8 antselid, u8 fbantselid, u8 *antcfg,
263 u8 *fbantcfg)
264 {
265 u8 ant;
266
267 /* if use default, assign it and return */
268 if (usedef) {
269 *antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_DEF];
270 *fbantcfg = *antcfg;
271 return;
272 }
273
274 if (!sel) {
275 *antcfg = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
276 *fbantcfg = *antcfg;
277
278 } else {
279 ant = asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
280 if ((ant & ANT_SELCFG_AUTO) == ANT_SELCFG_AUTO) {
281 *antcfg = brcms_c_antsel_id2antcfg(asi, antselid);
282 *fbantcfg = brcms_c_antsel_id2antcfg(asi, fbantselid);
283 } else {
284 *antcfg =
285 asi->antcfg_11n.ant_config[ANT_SELCFG_TX_UNICAST];
286 *fbantcfg = *antcfg;
287 }
288 }
289 return;
290 }
291
292 /* boardlevel antenna selection: convert mimo_antsel (ucode interface) to id */
brcms_c_antsel_antsel2id(struct antsel_info * asi,u16 antsel)293 u8 brcms_c_antsel_antsel2id(struct antsel_info *asi, u16 antsel)
294 {
295 u8 antselid = 0;
296
297 if (asi->antsel_type == ANTSEL_2x4) {
298 /* 2x4 antenna diversity board, 4 cfgs: 0-2 0-3 1-2 1-3 */
299 antselid = mimo_2x4_div_antselid_tbl[(antsel & 0xf)];
300 return antselid;
301
302 } else if (asi->antsel_type == ANTSEL_2x3) {
303 /* 2x3 antenna selection, 3 cfgs: 0-1 0-2 2-1 */
304 antselid = mimo_2x3_div_antselid_tbl[(antsel & 0xf)];
305 return antselid;
306 }
307
308 return antselid;
309 }
310