1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * nxpwifi: Channel, Frequency and Power
4 *
5 * Copyright 2011-2024 NXP
6 */
7
8 #include "cfg.h"
9 #include "util.h"
10 #include "fw.h"
11 #include "main.h"
12 #include "cfg80211.h"
13
14 /* 100mW */
15 #define NXPWIFI_TX_PWR_DEFAULT 20
16 /* 100mW */
17 #define NXPWIFI_TX_PWR_US_DEFAULT 20
18 /* 50mW */
19 #define NXPWIFI_TX_PWR_JP_DEFAULT 16
20 /* 100mW */
21 #define NXPWIFI_TX_PWR_FR_100MW 20
22 /* 10mW */
23 #define NXPWIFI_TX_PWR_FR_10MW 10
24 /* 100mW */
25 #define NXPWIFI_TX_PWR_EMEA_DEFAULT 20
26
27 static u8 supported_rates_a[A_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
28 0xb0, 0x48, 0x60, 0x6c, 0 };
29 static u16 nxpwifi_data_rates[NXPWIFI_SUPPORTED_RATES_EXT] = { 0x02, 0x04,
30 0x0B, 0x16, 0x00, 0x0C, 0x12, 0x18,
31 0x24, 0x30, 0x48, 0x60, 0x6C, 0x90,
32 0x0D, 0x1A, 0x27, 0x34, 0x4E, 0x68,
33 0x75, 0x82, 0x0C, 0x1B, 0x36, 0x51,
34 0x6C, 0xA2, 0xD8, 0xF3, 0x10E, 0x00 };
35
36 static u8 supported_rates_b[B_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x16, 0 };
37
38 static u8 supported_rates_g[G_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
39 0x30, 0x48, 0x60, 0x6c, 0 };
40
41 static u8 supported_rates_bg[BG_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x0c,
42 0x12, 0x16, 0x18, 0x24, 0x30, 0x48,
43 0x60, 0x6c, 0 };
44
45 /* mcs_rate: first 8 entries for 1x1; all 16 for 2x2. */
46 static const u16 mcs_rate[4][16] = {
47 /* LGI 40M */
48 { 0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e,
49 0x36, 0x6c, 0xa2, 0xd8, 0x144, 0x1b0, 0x1e6, 0x21c },
50
51 /* SGI 40M */
52 { 0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c,
53 0x3c, 0x78, 0xb4, 0xf0, 0x168, 0x1e0, 0x21c, 0x258 },
54
55 /* LGI 20M */
56 { 0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82,
57 0x1a, 0x34, 0x4e, 0x68, 0x9c, 0xd0, 0xea, 0x104 },
58
59 /* SGI 20M */
60 { 0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90,
61 0x1c, 0x39, 0x56, 0x73, 0xad, 0xe7, 0x104, 0x120 }
62 };
63
64 /* AC rates */
65 static const u16 ac_mcs_rate_nss1[8][10] = {
66 /* LG 160M */
67 { 0x75, 0xEA, 0x15F, 0x1D4, 0x2BE, 0x3A8, 0x41D,
68 0x492, 0x57C, 0x618 },
69
70 /* SG 160M */
71 { 0x82, 0x104, 0x186, 0x208, 0x30C, 0x410, 0x492,
72 0x514, 0x618, 0x6C6 },
73
74 /* LG 80M */
75 { 0x3B, 0x75, 0xB0, 0xEA, 0x15F, 0x1D4, 0x20F,
76 0x249, 0x2BE, 0x30C },
77
78 /* SG 80M */
79 { 0x41, 0x82, 0xC3, 0x104, 0x186, 0x208, 0x249,
80 0x28A, 0x30C, 0x363 },
81
82 /* LG 40M */
83 { 0x1B, 0x36, 0x51, 0x6C, 0xA2, 0xD8, 0xF3,
84 0x10E, 0x144, 0x168 },
85
86 /* SG 40M */
87 { 0x1E, 0x3C, 0x5A, 0x78, 0xB4, 0xF0, 0x10E,
88 0x12C, 0x168, 0x190 },
89
90 /* LG 20M */
91 { 0xD, 0x1A, 0x27, 0x34, 0x4E, 0x68, 0x75, 0x82, 0x9C, 0x00 },
92
93 /* SG 20M */
94 { 0xF, 0x1D, 0x2C, 0x3A, 0x57, 0x74, 0x82, 0x91, 0xAE, 0x00 },
95 };
96
97 /* NSS2 note: the value in the table is 2 multiplier of the actual rate */
98 static const u16 ac_mcs_rate_nss2[8][10] = {
99 /* LG 160M */
100 { 0xEA, 0x1D4, 0x2BE, 0x3A8, 0x57C, 0x750, 0x83A,
101 0x924, 0xAF8, 0xC30 },
102
103 /* SG 160M */
104 { 0x104, 0x208, 0x30C, 0x410, 0x618, 0x820, 0x924,
105 0xA28, 0xC30, 0xD8B },
106
107 /* LG 80M */
108 { 0x75, 0xEA, 0x15F, 0x1D4, 0x2BE, 0x3A8, 0x41D,
109 0x492, 0x57C, 0x618 },
110
111 /* SG 80M */
112 { 0x82, 0x104, 0x186, 0x208, 0x30C, 0x410, 0x492,
113 0x514, 0x618, 0x6C6 },
114
115 /* LG 40M */
116 { 0x36, 0x6C, 0xA2, 0xD8, 0x144, 0x1B0, 0x1E6,
117 0x21C, 0x288, 0x2D0 },
118
119 /* SG 40M */
120 { 0x3C, 0x78, 0xB4, 0xF0, 0x168, 0x1E0, 0x21C,
121 0x258, 0x2D0, 0x320 },
122
123 /* LG 20M */
124 { 0x1A, 0x34, 0x4A, 0x68, 0x9C, 0xD0, 0xEA, 0x104,
125 0x138, 0x00 },
126
127 /* SG 20M */
128 { 0x1D, 0x3A, 0x57, 0x74, 0xAE, 0xE6, 0x104, 0x121,
129 0x15B, 0x00 },
130 };
131
132 struct region_code_mapping {
133 u8 code;
134 u8 region[IEEE80211_COUNTRY_STRING_LEN];
135 };
136
137 static struct region_code_mapping region_code_mapping_t[] = {
138 { 0x10, "US " }, /* US FCC */
139 { 0x20, "CA " }, /* IC Canada */
140 { 0x30, "FR " }, /* France */
141 { 0x31, "ES " }, /* Spain */
142 { 0x32, "FR " }, /* France */
143 { 0x40, "JP " }, /* Japan */
144 { 0x41, "JP " }, /* Japan */
145 { 0x50, "CN " }, /* China */
146 };
147
148 /* Convert 11d country code to region string. */
nxpwifi_11d_code_2_region(u8 code)149 u8 *nxpwifi_11d_code_2_region(u8 code)
150 {
151 u8 i;
152
153 /* Look for code in mapping table */
154 for (i = 0; i < ARRAY_SIZE(region_code_mapping_t); i++)
155 if (region_code_mapping_t[i].code == code)
156 return region_code_mapping_t[i].region;
157
158 return NULL;
159 }
160
161 /* Map supported rate index to AC/VHT data rate. */
nxpwifi_index_to_acs_data_rate(struct nxpwifi_private * priv,u8 index,u8 ht_info)162 u32 nxpwifi_index_to_acs_data_rate(struct nxpwifi_private *priv,
163 u8 index, u8 ht_info)
164 {
165 u32 rate = 0;
166 u8 mcs_index = 0;
167 u8 bw = 0;
168 u8 gi = 0;
169
170 if ((ht_info & 0x3) == NXPWIFI_RATE_FORMAT_VHT) {
171 mcs_index = min(index & 0xF, 9);
172
173 /* 20M: bw=0, 40M: bw=1, 80M: bw=2, 160M: bw=3 */
174 bw = (ht_info & 0xC) >> 2;
175
176 /* LGI: gi =0, SGI: gi = 1 */
177 gi = (ht_info & 0x10) >> 4;
178
179 if ((index >> 4) == 1) /* NSS = 2 */
180 rate = ac_mcs_rate_nss2[2 * (3 - bw) + gi][mcs_index];
181 else /* NSS = 1 */
182 rate = ac_mcs_rate_nss1[2 * (3 - bw) + gi][mcs_index];
183 } else if ((ht_info & 0x3) == NXPWIFI_RATE_FORMAT_HT) {
184 /* 20M: bw=0, 40M: bw=1 */
185 bw = (ht_info & 0xC) >> 2;
186
187 /* LGI: gi =0, SGI: gi = 1 */
188 gi = (ht_info & 0x10) >> 4;
189
190 if (index == NXPWIFI_RATE_BITMAP_MCS0) {
191 if (gi == 1)
192 rate = 0x0D; /* MCS 32 SGI rate */
193 else
194 rate = 0x0C; /* MCS 32 LGI rate */
195 } else if (index < 16) {
196 if (bw == 1 || bw == 0)
197 rate = mcs_rate[2 * (1 - bw) + gi][index];
198 else
199 rate = nxpwifi_data_rates[0];
200 } else {
201 rate = nxpwifi_data_rates[0];
202 }
203 } else {
204 /* 11n non-HT rates */
205 if (index >= NXPWIFI_SUPPORTED_RATES_EXT)
206 index = 0;
207 rate = nxpwifi_data_rates[index];
208 }
209
210 return rate;
211 }
212
213 /* Map supported rate index to data rate. */
nxpwifi_index_to_data_rate(struct nxpwifi_private * priv,u8 index,u8 ht_info)214 u32 nxpwifi_index_to_data_rate(struct nxpwifi_private *priv,
215 u8 index, u8 ht_info)
216 {
217 u32 mcs_num_supp =
218 (priv->adapter->user_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
219 u32 rate;
220
221 if (priv->adapter->is_hw_11ac_capable)
222 return nxpwifi_index_to_acs_data_rate(priv, index, ht_info);
223
224 if (ht_info & BIT(0)) {
225 if (index == NXPWIFI_RATE_BITMAP_MCS0) {
226 if (ht_info & BIT(2))
227 rate = 0x0D; /* MCS 32 SGI rate */
228 else
229 rate = 0x0C; /* MCS 32 LGI rate */
230 } else if (index < mcs_num_supp) {
231 if (ht_info & BIT(1)) {
232 if (ht_info & BIT(2))
233 /* SGI, 40M */
234 rate = mcs_rate[1][index];
235 else
236 /* LGI, 40M */
237 rate = mcs_rate[0][index];
238 } else {
239 if (ht_info & BIT(2))
240 /* SGI, 20M */
241 rate = mcs_rate[3][index];
242 else
243 /* LGI, 20M */
244 rate = mcs_rate[2][index];
245 }
246 } else {
247 rate = nxpwifi_data_rates[0];
248 }
249 } else {
250 if (index >= NXPWIFI_SUPPORTED_RATES_EXT)
251 index = 0;
252 rate = nxpwifi_data_rates[index];
253 }
254 return rate;
255 }
256
257 /* Return current active data rates (depends on connection). */
nxpwifi_get_active_data_rates(struct nxpwifi_private * priv,u8 * rates)258 u32 nxpwifi_get_active_data_rates(struct nxpwifi_private *priv, u8 *rates)
259 {
260 if (!priv->media_connected)
261 return nxpwifi_get_supported_rates(priv, rates);
262 else
263 return nxpwifi_copy_rates(rates, 0,
264 priv->curr_bss_params.data_rates,
265 priv->curr_bss_params.num_of_rates);
266 }
267
268 /* Find Channel/Frequency/Power by band and channel or frequency. */
269 struct nxpwifi_chan_freq_power *
nxpwifi_get_cfp(struct nxpwifi_private * priv,u8 band,u16 channel,u32 freq)270 nxpwifi_get_cfp(struct nxpwifi_private *priv, u8 band, u16 channel, u32 freq)
271 {
272 struct nxpwifi_chan_freq_power *cfp = NULL;
273 struct ieee80211_supported_band *sband;
274 struct ieee80211_channel *ch = NULL;
275 int i;
276
277 if (!channel && !freq)
278 return cfp;
279
280 if (nxpwifi_band_to_radio_type(band) == HOST_SCAN_RADIO_TYPE_BG)
281 sband = priv->wdev.wiphy->bands[NL80211_BAND_2GHZ];
282 else
283 sband = priv->wdev.wiphy->bands[NL80211_BAND_5GHZ];
284
285 if (!sband) {
286 nxpwifi_dbg(priv->adapter, ERROR,
287 "%s: cannot find cfp by band %d\n",
288 __func__, band);
289 return cfp;
290 }
291
292 for (i = 0; i < sband->n_channels; i++) {
293 ch = &sband->channels[i];
294
295 if (ch->flags & IEEE80211_CHAN_DISABLED)
296 continue;
297
298 if (freq) {
299 if (ch->center_freq == freq)
300 break;
301 } else {
302 /* Find by valid channel. */
303 if (ch->hw_value == channel ||
304 channel == FIRST_VALID_CHANNEL)
305 break;
306 }
307 }
308 if (i == sband->n_channels) {
309 nxpwifi_dbg(priv->adapter, WARN,
310 "%s: cannot find cfp by band %d\t"
311 "& channel=%d freq=%d\n",
312 __func__, band, channel, freq);
313 } else {
314 if (!ch)
315 return cfp;
316
317 priv->cfp.channel = ch->hw_value;
318 priv->cfp.freq = ch->center_freq;
319 priv->cfp.max_tx_power = ch->max_power;
320 cfp = &priv->cfp;
321 }
322
323 return cfp;
324 }
325
326 /* Return true if data rate is set to auto. */
327 u8
nxpwifi_is_rate_auto(struct nxpwifi_private * priv)328 nxpwifi_is_rate_auto(struct nxpwifi_private *priv)
329 {
330 u32 i;
331 int rate_num = 0;
332
333 for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
334 if (priv->bitmap_rates[i])
335 rate_num++;
336
337 if (rate_num > 1)
338 return true;
339 else
340 return false;
341 }
342
343 /* Extract supported rates from cfg80211_scan_request bitmask. */
nxpwifi_get_rates_from_cfg80211(struct nxpwifi_private * priv,u8 * rates,u8 radio_type)344 u32 nxpwifi_get_rates_from_cfg80211(struct nxpwifi_private *priv,
345 u8 *rates, u8 radio_type)
346 {
347 struct wiphy *wiphy = priv->adapter->wiphy;
348 struct cfg80211_scan_request *request = priv->scan_request;
349 u32 num_rates, rate_mask;
350 struct ieee80211_supported_band *sband;
351 int i;
352
353 if (radio_type) {
354 sband = wiphy->bands[NL80211_BAND_5GHZ];
355 if (WARN_ON_ONCE(!sband))
356 return 0;
357 rate_mask = request->rates[NL80211_BAND_5GHZ];
358 } else {
359 sband = wiphy->bands[NL80211_BAND_2GHZ];
360 if (WARN_ON_ONCE(!sband))
361 return 0;
362 rate_mask = request->rates[NL80211_BAND_2GHZ];
363 }
364
365 num_rates = 0;
366 for (i = 0; i < sband->n_bitrates; i++) {
367 if ((BIT(i) & rate_mask) == 0)
368 continue; /* skip rate */
369 rates[num_rates++] = (u8)(sband->bitrates[i].bitrate / 5);
370 }
371
372 return num_rates;
373 }
374
375 /* Convert config_bands to B/G/A band */
nxpwifi_convert_config_bands(u16 config_bands)376 static u16 nxpwifi_convert_config_bands(u16 config_bands)
377 {
378 u16 bands = 0;
379
380 if (config_bands & BAND_B)
381 bands |= BAND_B;
382 if (config_bands & BAND_G || config_bands & BAND_GN ||
383 config_bands & BAND_GAC || config_bands & BAND_GAX)
384 bands |= BAND_G;
385 if (config_bands & BAND_A || config_bands & BAND_AN ||
386 config_bands & BAND_AAC || config_bands & BAND_AAX)
387 bands |= BAND_A;
388
389 return bands;
390 }
391
392 /* Get supported rates in infrastructure (STA/P2P client) mode. */
nxpwifi_get_supported_rates(struct nxpwifi_private * priv,u8 * rates)393 u32 nxpwifi_get_supported_rates(struct nxpwifi_private *priv, u8 *rates)
394 {
395 struct nxpwifi_adapter *adapter = priv->adapter;
396 u32 k = 0;
397 u16 bands = 0;
398
399 bands = nxpwifi_convert_config_bands(adapter->fw_bands);
400
401 if (priv->bss_mode == NL80211_IFTYPE_STATION) {
402 if (bands == BAND_B) {
403 /* B only */
404 nxpwifi_dbg(adapter, INFO, "info: infra band=%d\t"
405 "supported_rates_b\n",
406 priv->config_bands);
407 k = nxpwifi_copy_rates(rates, k, supported_rates_b,
408 sizeof(supported_rates_b));
409 } else if (bands == BAND_G) {
410 /* G only */
411 nxpwifi_dbg(adapter, INFO, "info: infra band=%d\t"
412 "supported_rates_g\n",
413 priv->config_bands);
414 k = nxpwifi_copy_rates(rates, k, supported_rates_g,
415 sizeof(supported_rates_g));
416 } else if (bands & (BAND_B | BAND_G)) {
417 /* BG only */
418 nxpwifi_dbg(adapter, INFO, "info: infra band=%d\t"
419 "supported_rates_bg\n",
420 priv->config_bands);
421 k = nxpwifi_copy_rates(rates, k, supported_rates_bg,
422 sizeof(supported_rates_bg));
423 } else if (bands & BAND_A) {
424 /* support A */
425 nxpwifi_dbg(adapter, INFO, "info: infra band=%d\t"
426 "supported_rates_a\n",
427 priv->config_bands);
428 k = nxpwifi_copy_rates(rates, k, supported_rates_a,
429 sizeof(supported_rates_a));
430 }
431 }
432
433 return k;
434 }
435
nxpwifi_adjust_data_rate(struct nxpwifi_private * priv,u8 rx_rate,u8 rate_info)436 u8 nxpwifi_adjust_data_rate(struct nxpwifi_private *priv,
437 u8 rx_rate, u8 rate_info)
438 {
439 u8 rate_index = 0;
440
441 /* HT40 */
442 if ((rate_info & BIT(0)) && (rate_info & BIT(1)))
443 rate_index = NXPWIFI_RATE_INDEX_MCS0 +
444 NXPWIFI_BW20_MCS_NUM + rx_rate;
445 else if (rate_info & BIT(0)) /* HT20 */
446 rate_index = NXPWIFI_RATE_INDEX_MCS0 + rx_rate;
447 else
448 rate_index = (rx_rate > NXPWIFI_RATE_INDEX_OFDM0) ?
449 rx_rate - 1 : rx_rate;
450
451 if (rate_index >= NXPWIFI_MAX_AC_RX_RATES)
452 rate_index = NXPWIFI_MAX_AC_RX_RATES - 1;
453
454 return rate_index;
455 }
456
457 /* Check if the given region code is a valid NXP-defined region code.
458 * Valid codes are defined by the FW v18 region enum in IEEE_types.h:
459 * 0x00 (World), 0x10 (US/FCC), 0x20 (Canada/IC), 0x30 (ETSI),
460 * 0x31 (Spain), 0x32 (France), 0x40 (Japan), 0x41 (Japan1), 0x50 (China)
461 */
nxpwifi_is_valid_region_code(enum nxpwifi_region_code code)462 bool nxpwifi_is_valid_region_code(enum nxpwifi_region_code code)
463 {
464 switch (code) {
465 case NXPWIFI_REGION_WORLD:
466 case NXPWIFI_REGION_FCC:
467 case NXPWIFI_REGION_IC:
468 case NXPWIFI_REGION_ETSI:
469 case NXPWIFI_REGION_SPAIN:
470 case NXPWIFI_REGION_FRANCE:
471 case NXPWIFI_REGION_JAPAN:
472 case NXPWIFI_REGION_JAPAN1:
473 case NXPWIFI_REGION_CHINA:
474 return true;
475 default:
476 return false;
477 }
478 }
479