1 /*
2 * Marvell Wireless LAN device driver: Channel, Frequence and Power
3 *
4 * Copyright (C) 2011, Marvell International Ltd.
5 *
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13 *
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
18 */
19
20 #include "decl.h"
21 #include "ioctl.h"
22 #include "util.h"
23 #include "fw.h"
24 #include "main.h"
25 #include "cfg80211.h"
26
27 /* 100mW */
28 #define MWIFIEX_TX_PWR_DEFAULT 20
29 /* 100mW */
30 #define MWIFIEX_TX_PWR_US_DEFAULT 20
31 /* 50mW */
32 #define MWIFIEX_TX_PWR_JP_DEFAULT 16
33 /* 100mW */
34 #define MWIFIEX_TX_PWR_FR_100MW 20
35 /* 10mW */
36 #define MWIFIEX_TX_PWR_FR_10MW 10
37 /* 100mW */
38 #define MWIFIEX_TX_PWR_EMEA_DEFAULT 20
39
40 static u8 adhoc_rates_b[B_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96, 0 };
41
42 static u8 adhoc_rates_g[G_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
43 0xb0, 0x48, 0x60, 0x6c, 0 };
44
45 static u8 adhoc_rates_bg[BG_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96,
46 0x0c, 0x12, 0x18, 0x24,
47 0x30, 0x48, 0x60, 0x6c, 0 };
48
49 static u8 adhoc_rates_a[A_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
50 0xb0, 0x48, 0x60, 0x6c, 0 };
51 static u8 supported_rates_a[A_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
52 0xb0, 0x48, 0x60, 0x6c, 0 };
53 static u16 mwifiex_data_rates[MWIFIEX_SUPPORTED_RATES_EXT] = { 0x02, 0x04,
54 0x0B, 0x16, 0x00, 0x0C, 0x12, 0x18,
55 0x24, 0x30, 0x48, 0x60, 0x6C, 0x90,
56 0x0D, 0x1A, 0x27, 0x34, 0x4E, 0x68,
57 0x75, 0x82, 0x0C, 0x1B, 0x36, 0x51,
58 0x6C, 0xA2, 0xD8, 0xF3, 0x10E, 0x00 };
59
60 static u8 supported_rates_b[B_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x16, 0 };
61
62 static u8 supported_rates_g[G_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
63 0x30, 0x48, 0x60, 0x6c, 0 };
64
65 static u8 supported_rates_bg[BG_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x0c,
66 0x12, 0x16, 0x18, 0x24, 0x30, 0x48,
67 0x60, 0x6c, 0 };
68
69 u16 region_code_index[MWIFIEX_MAX_REGION_CODE] = { 0x10, 0x20, 0x30,
70 0x32, 0x40, 0x41, 0xff };
71
72 static u8 supported_rates_n[N_SUPPORTED_RATES] = { 0x02, 0x04, 0 };
73
74 /*
75 * This function maps an index in supported rates table into
76 * the corresponding data rate.
77 */
mwifiex_index_to_data_rate(struct mwifiex_private * priv,u8 index,u8 ht_info)78 u32 mwifiex_index_to_data_rate(struct mwifiex_private *priv, u8 index,
79 u8 ht_info)
80 {
81 /*
82 * For every mcs_rate line, the first 8 bytes are for stream 1x1,
83 * and all 16 bytes are for stream 2x2.
84 */
85 u16 mcs_rate[4][16] = {
86 /* LGI 40M */
87 { 0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e,
88 0x36, 0x6c, 0xa2, 0xd8, 0x144, 0x1b0, 0x1e6, 0x21c },
89
90 /* SGI 40M */
91 { 0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c,
92 0x3c, 0x78, 0xb4, 0xf0, 0x168, 0x1e0, 0x21c, 0x258 },
93
94 /* LGI 20M */
95 { 0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82,
96 0x1a, 0x34, 0x4e, 0x68, 0x9c, 0xd0, 0xea, 0x104 },
97
98 /* SGI 20M */
99 { 0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90,
100 0x1c, 0x39, 0x56, 0x73, 0xad, 0xe7, 0x104, 0x120 }
101 };
102 u32 mcs_num_supp =
103 (priv->adapter->hw_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
104 u32 rate;
105
106 if (ht_info & BIT(0)) {
107 if (index == MWIFIEX_RATE_BITMAP_MCS0) {
108 if (ht_info & BIT(2))
109 rate = 0x0D; /* MCS 32 SGI rate */
110 else
111 rate = 0x0C; /* MCS 32 LGI rate */
112 } else if (index < mcs_num_supp) {
113 if (ht_info & BIT(1)) {
114 if (ht_info & BIT(2))
115 /* SGI, 40M */
116 rate = mcs_rate[1][index];
117 else
118 /* LGI, 40M */
119 rate = mcs_rate[0][index];
120 } else {
121 if (ht_info & BIT(2))
122 /* SGI, 20M */
123 rate = mcs_rate[3][index];
124 else
125 /* LGI, 20M */
126 rate = mcs_rate[2][index];
127 }
128 } else
129 rate = mwifiex_data_rates[0];
130 } else {
131 if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
132 index = 0;
133 rate = mwifiex_data_rates[index];
134 }
135 return rate;
136 }
137
138 /*
139 * This function maps a data rate value into corresponding index in supported
140 * rates table.
141 */
mwifiex_data_rate_to_index(u32 rate)142 u8 mwifiex_data_rate_to_index(u32 rate)
143 {
144 u16 *ptr;
145
146 if (rate) {
147 ptr = memchr(mwifiex_data_rates, rate,
148 sizeof(mwifiex_data_rates));
149 if (ptr)
150 return (u8) (ptr - mwifiex_data_rates);
151 }
152 return 0;
153 }
154
155 /*
156 * This function returns the current active data rates.
157 *
158 * The result may vary depending upon connection status.
159 */
mwifiex_get_active_data_rates(struct mwifiex_private * priv,u8 * rates)160 u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
161 {
162 if (!priv->media_connected)
163 return mwifiex_get_supported_rates(priv, rates);
164 else
165 return mwifiex_copy_rates(rates, 0,
166 priv->curr_bss_params.data_rates,
167 priv->curr_bss_params.num_of_rates);
168 }
169
170 /*
171 * This function locates the Channel-Frequency-Power triplet based upon
172 * band and channel parameters.
173 */
174 struct mwifiex_chan_freq_power *
mwifiex_get_cfp_by_band_and_channel_from_cfg80211(struct mwifiex_private * priv,u8 band,u16 channel)175 mwifiex_get_cfp_by_band_and_channel_from_cfg80211(struct mwifiex_private
176 *priv, u8 band, u16 channel)
177 {
178 struct mwifiex_chan_freq_power *cfp = NULL;
179 struct ieee80211_supported_band *sband;
180 struct ieee80211_channel *ch;
181 int i;
182
183 if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
184 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
185 else
186 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
187
188 if (!sband) {
189 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
190 " & channel %d\n", __func__, band, channel);
191 return cfp;
192 }
193
194 for (i = 0; i < sband->n_channels; i++) {
195 ch = &sband->channels[i];
196 if (((ch->hw_value == channel) ||
197 (channel == FIRST_VALID_CHANNEL))
198 && !(ch->flags & IEEE80211_CHAN_DISABLED)) {
199 priv->cfp.channel = channel;
200 priv->cfp.freq = ch->center_freq;
201 priv->cfp.max_tx_power = ch->max_power;
202 cfp = &priv->cfp;
203 break;
204 }
205 }
206 if (i == sband->n_channels)
207 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
208 " & channel %d\n", __func__, band, channel);
209
210 return cfp;
211 }
212
213 /*
214 * This function locates the Channel-Frequency-Power triplet based upon
215 * band and frequency parameters.
216 */
217 struct mwifiex_chan_freq_power *
mwifiex_get_cfp_by_band_and_freq_from_cfg80211(struct mwifiex_private * priv,u8 band,u32 freq)218 mwifiex_get_cfp_by_band_and_freq_from_cfg80211(struct mwifiex_private *priv,
219 u8 band, u32 freq)
220 {
221 struct mwifiex_chan_freq_power *cfp = NULL;
222 struct ieee80211_supported_band *sband;
223 struct ieee80211_channel *ch;
224 int i;
225
226 if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
227 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
228 else
229 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
230
231 if (!sband) {
232 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
233 " & freq %d\n", __func__, band, freq);
234 return cfp;
235 }
236
237 for (i = 0; i < sband->n_channels; i++) {
238 ch = &sband->channels[i];
239 if ((ch->center_freq == freq) &&
240 !(ch->flags & IEEE80211_CHAN_DISABLED)) {
241 priv->cfp.channel = ch->hw_value;
242 priv->cfp.freq = freq;
243 priv->cfp.max_tx_power = ch->max_power;
244 cfp = &priv->cfp;
245 break;
246 }
247 }
248 if (i == sband->n_channels)
249 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
250 " & freq %d\n", __func__, band, freq);
251
252 return cfp;
253 }
254
255 /*
256 * This function checks if the data rate is set to auto.
257 */
258 u8
mwifiex_is_rate_auto(struct mwifiex_private * priv)259 mwifiex_is_rate_auto(struct mwifiex_private *priv)
260 {
261 u32 i;
262 int rate_num = 0;
263
264 for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
265 if (priv->bitmap_rates[i])
266 rate_num++;
267
268 if (rate_num > 1)
269 return true;
270 else
271 return false;
272 }
273
274 /*
275 * This function converts rate bitmap into rate index.
276 */
mwifiex_get_rate_index(u16 * rate_bitmap,int size)277 int mwifiex_get_rate_index(u16 *rate_bitmap, int size)
278 {
279 int i;
280
281 for (i = 0; i < size * 8; i++)
282 if (rate_bitmap[i / 16] & (1 << (i % 16)))
283 return i;
284
285 return 0;
286 }
287
288 /*
289 * This function gets the supported data rates.
290 *
291 * The function works in both Ad-Hoc and infra mode by printing the
292 * band and returning the data rates.
293 */
mwifiex_get_supported_rates(struct mwifiex_private * priv,u8 * rates)294 u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
295 {
296 u32 k = 0;
297 struct mwifiex_adapter *adapter = priv->adapter;
298 if (priv->bss_mode == NL80211_IFTYPE_STATION) {
299 switch (adapter->config_bands) {
300 case BAND_B:
301 dev_dbg(adapter->dev, "info: infra band=%d "
302 "supported_rates_b\n", adapter->config_bands);
303 k = mwifiex_copy_rates(rates, k, supported_rates_b,
304 sizeof(supported_rates_b));
305 break;
306 case BAND_G:
307 case BAND_G | BAND_GN:
308 dev_dbg(adapter->dev, "info: infra band=%d "
309 "supported_rates_g\n", adapter->config_bands);
310 k = mwifiex_copy_rates(rates, k, supported_rates_g,
311 sizeof(supported_rates_g));
312 break;
313 case BAND_B | BAND_G:
314 case BAND_A | BAND_B | BAND_G:
315 case BAND_A | BAND_B:
316 case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
317 case BAND_B | BAND_G | BAND_GN:
318 dev_dbg(adapter->dev, "info: infra band=%d "
319 "supported_rates_bg\n", adapter->config_bands);
320 k = mwifiex_copy_rates(rates, k, supported_rates_bg,
321 sizeof(supported_rates_bg));
322 break;
323 case BAND_A:
324 case BAND_A | BAND_G:
325 dev_dbg(adapter->dev, "info: infra band=%d "
326 "supported_rates_a\n", adapter->config_bands);
327 k = mwifiex_copy_rates(rates, k, supported_rates_a,
328 sizeof(supported_rates_a));
329 break;
330 case BAND_A | BAND_AN:
331 case BAND_A | BAND_G | BAND_AN | BAND_GN:
332 dev_dbg(adapter->dev, "info: infra band=%d "
333 "supported_rates_a\n", adapter->config_bands);
334 k = mwifiex_copy_rates(rates, k, supported_rates_a,
335 sizeof(supported_rates_a));
336 break;
337 case BAND_GN:
338 dev_dbg(adapter->dev, "info: infra band=%d "
339 "supported_rates_n\n", adapter->config_bands);
340 k = mwifiex_copy_rates(rates, k, supported_rates_n,
341 sizeof(supported_rates_n));
342 break;
343 }
344 } else {
345 /* Ad-hoc mode */
346 switch (adapter->adhoc_start_band) {
347 case BAND_B:
348 dev_dbg(adapter->dev, "info: adhoc B\n");
349 k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
350 sizeof(adhoc_rates_b));
351 break;
352 case BAND_G:
353 case BAND_G | BAND_GN:
354 dev_dbg(adapter->dev, "info: adhoc G only\n");
355 k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
356 sizeof(adhoc_rates_g));
357 break;
358 case BAND_B | BAND_G:
359 case BAND_B | BAND_G | BAND_GN:
360 dev_dbg(adapter->dev, "info: adhoc BG\n");
361 k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
362 sizeof(adhoc_rates_bg));
363 break;
364 case BAND_A:
365 case BAND_A | BAND_AN:
366 dev_dbg(adapter->dev, "info: adhoc A\n");
367 k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
368 sizeof(adhoc_rates_a));
369 break;
370 }
371 }
372
373 return k;
374 }
375