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5b435de0 AS |
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 <net/mac80211.h> | |
18 | ||
19 | #include "types.h" | |
20 | #include "d11.h" | |
21 | #include "rate.h" | |
22 | #include "phy/phy_hal.h" | |
23 | #include "channel.h" | |
24 | #include "main.h" | |
25 | #include "stf.h" | |
26 | ||
27 | #define MIN_SPATIAL_EXPANSION 0 | |
28 | #define MAX_SPATIAL_EXPANSION 1 | |
29 | ||
30 | #define BRCMS_STF_SS_STBC_RX(wlc) (BRCMS_ISNPHY(wlc->band) && \ | |
31 | NREV_GT(wlc->band->phyrev, 3) && NREV_LE(wlc->band->phyrev, 6)) | |
32 | ||
5b435de0 AS |
33 | #define NSTS_1 1 |
34 | #define NSTS_2 2 | |
35 | #define NSTS_3 3 | |
36 | #define NSTS_4 4 | |
37 | ||
38 | static const u8 txcore_default[5] = { | |
39 | (0), /* bitmap of the core enabled */ | |
40 | (0x01), /* For Nsts = 1, enable core 1 */ | |
41 | (0x03), /* For Nsts = 2, enable core 1 & 2 */ | |
42 | (0x07), /* For Nsts = 3, enable core 1, 2 & 3 */ | |
43 | (0x0f) /* For Nsts = 4, enable all cores */ | |
44 | }; | |
45 | ||
46 | static void brcms_c_stf_stbc_rx_ht_update(struct brcms_c_info *wlc, int val) | |
47 | { | |
48 | /* MIMOPHYs rev3-6 cannot receive STBC with only one rx core active */ | |
49 | if (BRCMS_STF_SS_STBC_RX(wlc)) { | |
50 | if ((wlc->stf->rxstreams == 1) && (val != HT_CAP_RX_STBC_NO)) | |
51 | return; | |
52 | } | |
53 | ||
54 | if (wlc->pub->up) { | |
55 | brcms_c_update_beacon(wlc); | |
56 | brcms_c_update_probe_resp(wlc, true); | |
57 | } | |
58 | } | |
59 | ||
60 | /* | |
61 | * every WLC_TEMPSENSE_PERIOD seconds temperature check to decide whether to | |
62 | * turn on/off txchain. | |
63 | */ | |
64 | void brcms_c_tempsense_upd(struct brcms_c_info *wlc) | |
65 | { | |
66 | struct brcms_phy_pub *pi = wlc->band->pi; | |
67 | uint active_chains, txchain; | |
68 | ||
69 | /* Check if the chip is too hot. Disable one Tx chain, if it is */ | |
70 | /* high 4 bits are for Rx chain, low 4 bits are for Tx chain */ | |
71 | active_chains = wlc_phy_stf_chain_active_get(pi); | |
72 | txchain = active_chains & 0xf; | |
73 | ||
74 | if (wlc->stf->txchain == wlc->stf->hw_txchain) { | |
75 | if (txchain && (txchain < wlc->stf->hw_txchain)) | |
76 | /* turn off 1 tx chain */ | |
77 | brcms_c_stf_txchain_set(wlc, txchain, true); | |
78 | } else if (wlc->stf->txchain < wlc->stf->hw_txchain) { | |
79 | if (txchain == wlc->stf->hw_txchain) | |
80 | /* turn back on txchain */ | |
81 | brcms_c_stf_txchain_set(wlc, txchain, true); | |
82 | } | |
83 | } | |
84 | ||
85 | void | |
86 | brcms_c_stf_ss_algo_channel_get(struct brcms_c_info *wlc, u16 *ss_algo_channel, | |
87 | u16 chanspec) | |
88 | { | |
89 | struct tx_power power; | |
90 | u8 siso_mcs_id, cdd_mcs_id, stbc_mcs_id; | |
91 | ||
92 | /* Clear previous settings */ | |
93 | *ss_algo_channel = 0; | |
94 | ||
95 | if (!wlc->pub->up) { | |
96 | *ss_algo_channel = (u16) -1; | |
97 | return; | |
98 | } | |
99 | ||
100 | wlc_phy_txpower_get_current(wlc->band->pi, &power, | |
101 | CHSPEC_CHANNEL(chanspec)); | |
102 | ||
103 | siso_mcs_id = (CHSPEC_IS40(chanspec)) ? | |
104 | WL_TX_POWER_MCS40_SISO_FIRST : WL_TX_POWER_MCS20_SISO_FIRST; | |
105 | cdd_mcs_id = (CHSPEC_IS40(chanspec)) ? | |
106 | WL_TX_POWER_MCS40_CDD_FIRST : WL_TX_POWER_MCS20_CDD_FIRST; | |
107 | stbc_mcs_id = (CHSPEC_IS40(chanspec)) ? | |
108 | WL_TX_POWER_MCS40_STBC_FIRST : WL_TX_POWER_MCS20_STBC_FIRST; | |
109 | ||
110 | /* criteria to choose stf mode */ | |
111 | ||
112 | /* | |
113 | * the "+3dbm (12 0.25db units)" is to account for the fact that with | |
114 | * CDD, tx occurs on both chains | |
115 | */ | |
116 | if (power.target[siso_mcs_id] > (power.target[cdd_mcs_id] + 12)) | |
117 | setbit(ss_algo_channel, PHY_TXC1_MODE_SISO); | |
118 | else | |
119 | setbit(ss_algo_channel, PHY_TXC1_MODE_CDD); | |
120 | ||
121 | /* | |
122 | * STBC is ORed into to algo channel as STBC requires per-packet SCB | |
123 | * capability check so cannot be default mode of operation. One of | |
124 | * SISO, CDD have to be set | |
125 | */ | |
126 | if (power.target[siso_mcs_id] <= (power.target[stbc_mcs_id] + 12)) | |
127 | setbit(ss_algo_channel, PHY_TXC1_MODE_STBC); | |
128 | } | |
129 | ||
130 | static bool brcms_c_stf_stbc_tx_set(struct brcms_c_info *wlc, s32 int_val) | |
131 | { | |
132 | if ((int_val != AUTO) && (int_val != OFF) && (int_val != ON)) | |
133 | return false; | |
134 | ||
135 | if ((int_val == ON) && (wlc->stf->txstreams == 1)) | |
136 | return false; | |
137 | ||
138 | wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = (s8) int_val; | |
139 | wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = (s8) int_val; | |
140 | ||
141 | return true; | |
142 | } | |
143 | ||
144 | bool brcms_c_stf_stbc_rx_set(struct brcms_c_info *wlc, s32 int_val) | |
145 | { | |
146 | if ((int_val != HT_CAP_RX_STBC_NO) | |
147 | && (int_val != HT_CAP_RX_STBC_ONE_STREAM)) | |
148 | return false; | |
149 | ||
150 | if (BRCMS_STF_SS_STBC_RX(wlc)) { | |
151 | if ((int_val != HT_CAP_RX_STBC_NO) | |
152 | && (wlc->stf->rxstreams == 1)) | |
153 | return false; | |
154 | } | |
155 | ||
156 | brcms_c_stf_stbc_rx_ht_update(wlc, int_val); | |
157 | return true; | |
158 | } | |
159 | ||
160 | static int brcms_c_stf_txcore_set(struct brcms_c_info *wlc, u8 Nsts, | |
161 | u8 core_mask) | |
162 | { | |
163 | BCMMSG(wlc->wiphy, "wl%d: Nsts %d core_mask %x\n", | |
164 | wlc->pub->unit, Nsts, core_mask); | |
165 | ||
166 | if (hweight8(core_mask) > wlc->stf->txstreams) | |
167 | core_mask = 0; | |
168 | ||
169 | if ((hweight8(core_mask) == wlc->stf->txstreams) && | |
170 | ((core_mask & ~wlc->stf->txchain) | |
171 | || !(core_mask & wlc->stf->txchain))) | |
172 | core_mask = wlc->stf->txchain; | |
173 | ||
174 | wlc->stf->txcore[Nsts] = core_mask; | |
175 | /* Nsts = 1..4, txcore index = 1..4 */ | |
176 | if (Nsts == 1) { | |
177 | /* Needs to update beacon and ucode generated response | |
178 | * frames when 1 stream core map changed | |
179 | */ | |
180 | wlc->stf->phytxant = core_mask << PHY_TXC_ANT_SHIFT; | |
181 | brcms_b_txant_set(wlc->hw, wlc->stf->phytxant); | |
182 | if (wlc->clk) { | |
183 | brcms_c_suspend_mac_and_wait(wlc); | |
184 | brcms_c_beacon_phytxctl_txant_upd(wlc, wlc->bcn_rspec); | |
185 | brcms_c_enable_mac(wlc); | |
186 | } | |
187 | } | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | static int brcms_c_stf_spatial_policy_set(struct brcms_c_info *wlc, int val) | |
193 | { | |
194 | int i; | |
195 | u8 core_mask = 0; | |
196 | ||
197 | BCMMSG(wlc->wiphy, "wl%d: val %x\n", wlc->pub->unit, val); | |
198 | ||
199 | wlc->stf->spatial_policy = (s8) val; | |
200 | for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) { | |
201 | core_mask = (val == MAX_SPATIAL_EXPANSION) ? | |
202 | wlc->stf->txchain : txcore_default[i]; | |
203 | brcms_c_stf_txcore_set(wlc, (u8) i, core_mask); | |
204 | } | |
205 | return 0; | |
206 | } | |
207 | ||
208 | /* | |
209 | * Centralized txant update function. call it whenever wlc->stf->txant and/or | |
210 | * wlc->stf->txchain change. | |
211 | * | |
212 | * Antennas are controlled by ucode indirectly, which drives PHY or GPIO to | |
213 | * achieve various tx/rx antenna selection schemes | |
214 | * | |
215 | * legacy phy, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 | |
216 | * means auto(last rx). | |
217 | * for NREV<3, bit 6 and bit 7 means antenna 0 and 1 respectively, bit6+bit7 | |
218 | * means last rx and do tx-antenna selection for SISO transmissions | |
219 | * for NREV=3, bit 6 and bit _8_ means antenna 0 and 1 respectively, bit6+bit7 | |
220 | * means last rx and do tx-antenna selection for SISO transmissions | |
221 | * for NREV>=7, bit 6 and bit 7 mean antenna 0 and 1 respectively, nit6+bit7 | |
222 | * means both cores active | |
223 | */ | |
224 | static void _brcms_c_stf_phy_txant_upd(struct brcms_c_info *wlc) | |
225 | { | |
226 | s8 txant; | |
227 | ||
228 | txant = (s8) wlc->stf->txant; | |
229 | if (BRCMS_PHY_11N_CAP(wlc->band)) { | |
230 | if (txant == ANT_TX_FORCE_0) { | |
231 | wlc->stf->phytxant = PHY_TXC_ANT_0; | |
232 | } else if (txant == ANT_TX_FORCE_1) { | |
233 | wlc->stf->phytxant = PHY_TXC_ANT_1; | |
234 | ||
235 | if (BRCMS_ISNPHY(wlc->band) && | |
236 | NREV_GE(wlc->band->phyrev, 3) | |
237 | && NREV_LT(wlc->band->phyrev, 7)) | |
238 | wlc->stf->phytxant = PHY_TXC_ANT_2; | |
239 | } else { | |
240 | if (BRCMS_ISLCNPHY(wlc->band) || | |
241 | BRCMS_ISSSLPNPHY(wlc->band)) | |
242 | wlc->stf->phytxant = PHY_TXC_LCNPHY_ANT_LAST; | |
243 | else { | |
244 | /* catch out of sync wlc->stf->txcore */ | |
245 | WARN_ON(wlc->stf->txchain <= 0); | |
246 | wlc->stf->phytxant = | |
247 | wlc->stf->txchain << PHY_TXC_ANT_SHIFT; | |
248 | } | |
249 | } | |
250 | } else { | |
251 | if (txant == ANT_TX_FORCE_0) | |
252 | wlc->stf->phytxant = PHY_TXC_OLD_ANT_0; | |
253 | else if (txant == ANT_TX_FORCE_1) | |
254 | wlc->stf->phytxant = PHY_TXC_OLD_ANT_1; | |
255 | else | |
256 | wlc->stf->phytxant = PHY_TXC_OLD_ANT_LAST; | |
257 | } | |
258 | ||
259 | brcms_b_txant_set(wlc->hw, wlc->stf->phytxant); | |
260 | } | |
261 | ||
262 | int brcms_c_stf_txchain_set(struct brcms_c_info *wlc, s32 int_val, bool force) | |
263 | { | |
264 | u8 txchain = (u8) int_val; | |
265 | u8 txstreams; | |
266 | uint i; | |
267 | ||
268 | if (wlc->stf->txchain == txchain) | |
269 | return 0; | |
270 | ||
271 | if ((txchain & ~wlc->stf->hw_txchain) | |
272 | || !(txchain & wlc->stf->hw_txchain)) | |
273 | return -EINVAL; | |
274 | ||
275 | /* | |
276 | * if nrate override is configured to be non-SISO STF mode, reject | |
277 | * reducing txchain to 1 | |
278 | */ | |
279 | txstreams = (u8) hweight8(txchain); | |
280 | if (txstreams > MAX_STREAMS_SUPPORTED) | |
281 | return -EINVAL; | |
282 | ||
283 | wlc->stf->txchain = txchain; | |
284 | wlc->stf->txstreams = txstreams; | |
285 | brcms_c_stf_stbc_tx_set(wlc, wlc->band->band_stf_stbc_tx); | |
286 | brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]); | |
287 | brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]); | |
288 | wlc->stf->txant = | |
289 | (wlc->stf->txstreams == 1) ? ANT_TX_FORCE_0 : ANT_TX_DEF; | |
290 | _brcms_c_stf_phy_txant_upd(wlc); | |
291 | ||
292 | wlc_phy_stf_chain_set(wlc->band->pi, wlc->stf->txchain, | |
293 | wlc->stf->rxchain); | |
294 | ||
295 | for (i = 1; i <= MAX_STREAMS_SUPPORTED; i++) | |
296 | brcms_c_stf_txcore_set(wlc, (u8) i, txcore_default[i]); | |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
301 | /* | |
302 | * update wlc->stf->ss_opmode which represents the operational stf_ss mode | |
303 | * we're using | |
304 | */ | |
305 | int brcms_c_stf_ss_update(struct brcms_c_info *wlc, struct brcms_band *band) | |
306 | { | |
307 | int ret_code = 0; | |
308 | u8 prev_stf_ss; | |
309 | u8 upd_stf_ss; | |
310 | ||
311 | prev_stf_ss = wlc->stf->ss_opmode; | |
312 | ||
313 | /* | |
314 | * NOTE: opmode can only be SISO or CDD as STBC is decided on a | |
315 | * per-packet basis | |
316 | */ | |
317 | if (BRCMS_STBC_CAP_PHY(wlc) && | |
318 | wlc->stf->ss_algosel_auto | |
319 | && (wlc->stf->ss_algo_channel != (u16) -1)) { | |
320 | upd_stf_ss = (wlc->stf->txstreams == 1 || | |
321 | isset(&wlc->stf->ss_algo_channel, | |
322 | PHY_TXC1_MODE_SISO)) ? | |
323 | PHY_TXC1_MODE_SISO : PHY_TXC1_MODE_CDD; | |
324 | } else { | |
325 | if (wlc->band != band) | |
326 | return ret_code; | |
327 | upd_stf_ss = (wlc->stf->txstreams == 1) ? | |
328 | PHY_TXC1_MODE_SISO : band->band_stf_ss_mode; | |
329 | } | |
330 | if (prev_stf_ss != upd_stf_ss) { | |
331 | wlc->stf->ss_opmode = upd_stf_ss; | |
332 | brcms_b_band_stf_ss_set(wlc->hw, upd_stf_ss); | |
333 | } | |
334 | ||
335 | return ret_code; | |
336 | } | |
337 | ||
338 | int brcms_c_stf_attach(struct brcms_c_info *wlc) | |
339 | { | |
340 | wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_SISO; | |
341 | wlc->bandstate[BAND_5G_INDEX]->band_stf_ss_mode = PHY_TXC1_MODE_CDD; | |
342 | ||
343 | if (BRCMS_ISNPHY(wlc->band) && | |
344 | (wlc_phy_txpower_hw_ctrl_get(wlc->band->pi) != PHY_TPC_HW_ON)) | |
345 | wlc->bandstate[BAND_2G_INDEX]->band_stf_ss_mode = | |
346 | PHY_TXC1_MODE_CDD; | |
347 | brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_2G_INDEX]); | |
348 | brcms_c_stf_ss_update(wlc, wlc->bandstate[BAND_5G_INDEX]); | |
349 | ||
350 | brcms_c_stf_stbc_rx_ht_update(wlc, HT_CAP_RX_STBC_NO); | |
351 | wlc->bandstate[BAND_2G_INDEX]->band_stf_stbc_tx = OFF; | |
352 | wlc->bandstate[BAND_5G_INDEX]->band_stf_stbc_tx = OFF; | |
353 | ||
354 | if (BRCMS_STBC_CAP_PHY(wlc)) { | |
355 | wlc->stf->ss_algosel_auto = true; | |
356 | /* Init the default value */ | |
357 | wlc->stf->ss_algo_channel = (u16) -1; | |
358 | } | |
359 | return 0; | |
360 | } | |
361 | ||
362 | void brcms_c_stf_detach(struct brcms_c_info *wlc) | |
363 | { | |
364 | } | |
365 | ||
366 | void brcms_c_stf_phy_txant_upd(struct brcms_c_info *wlc) | |
367 | { | |
368 | _brcms_c_stf_phy_txant_upd(wlc); | |
369 | } | |
370 | ||
371 | void brcms_c_stf_phy_chain_calc(struct brcms_c_info *wlc) | |
372 | { | |
898d3c3b HM |
373 | struct ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom; |
374 | ||
5b435de0 | 375 | /* get available rx/tx chains */ |
898d3c3b HM |
376 | wlc->stf->hw_txchain = sprom->txchain; |
377 | wlc->stf->hw_rxchain = sprom->rxchain; | |
5b435de0 AS |
378 | |
379 | /* these parameter are intended to be used for all PHY types */ | |
380 | if (wlc->stf->hw_txchain == 0 || wlc->stf->hw_txchain == 0xf) { | |
381 | if (BRCMS_ISNPHY(wlc->band)) | |
382 | wlc->stf->hw_txchain = TXCHAIN_DEF_NPHY; | |
383 | else | |
384 | wlc->stf->hw_txchain = TXCHAIN_DEF; | |
385 | } | |
386 | ||
387 | wlc->stf->txchain = wlc->stf->hw_txchain; | |
388 | wlc->stf->txstreams = (u8) hweight8(wlc->stf->hw_txchain); | |
389 | ||
390 | if (wlc->stf->hw_rxchain == 0 || wlc->stf->hw_rxchain == 0xf) { | |
391 | if (BRCMS_ISNPHY(wlc->band)) | |
392 | wlc->stf->hw_rxchain = RXCHAIN_DEF_NPHY; | |
393 | else | |
394 | wlc->stf->hw_rxchain = RXCHAIN_DEF; | |
395 | } | |
396 | ||
397 | wlc->stf->rxchain = wlc->stf->hw_rxchain; | |
398 | wlc->stf->rxstreams = (u8) hweight8(wlc->stf->hw_rxchain); | |
399 | ||
400 | /* initialize the txcore table */ | |
401 | memcpy(wlc->stf->txcore, txcore_default, sizeof(wlc->stf->txcore)); | |
402 | ||
403 | /* default spatial_policy */ | |
404 | wlc->stf->spatial_policy = MIN_SPATIAL_EXPANSION; | |
405 | brcms_c_stf_spatial_policy_set(wlc, MIN_SPATIAL_EXPANSION); | |
406 | } | |
407 | ||
408 | static u16 _brcms_c_stf_phytxchain_sel(struct brcms_c_info *wlc, | |
409 | u32 rspec) | |
410 | { | |
411 | u16 phytxant = wlc->stf->phytxant; | |
412 | ||
413 | if (rspec_stf(rspec) != PHY_TXC1_MODE_SISO) | |
414 | phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT; | |
415 | else if (wlc->stf->txant == ANT_TX_DEF) | |
416 | phytxant = wlc->stf->txchain << PHY_TXC_ANT_SHIFT; | |
417 | phytxant &= PHY_TXC_ANT_MASK; | |
418 | return phytxant; | |
419 | } | |
420 | ||
421 | u16 brcms_c_stf_phytxchain_sel(struct brcms_c_info *wlc, u32 rspec) | |
422 | { | |
423 | return _brcms_c_stf_phytxchain_sel(wlc, rspec); | |
424 | } | |
425 | ||
426 | u16 brcms_c_stf_d11hdrs_phyctl_txant(struct brcms_c_info *wlc, u32 rspec) | |
427 | { | |
428 | u16 phytxant = wlc->stf->phytxant; | |
429 | u16 mask = PHY_TXC_ANT_MASK; | |
430 | ||
431 | /* for non-siso rates or default setting, use the available chains */ | |
432 | if (BRCMS_ISNPHY(wlc->band)) { | |
433 | phytxant = _brcms_c_stf_phytxchain_sel(wlc, rspec); | |
434 | mask = PHY_TXC_HTANT_MASK; | |
435 | } | |
436 | phytxant |= phytxant & mask; | |
437 | return phytxant; | |
438 | } |