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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
40static u8 adhoc_rates_b[B_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96, 0 };
41
42static u8 adhoc_rates_g[G_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
43 0xb0, 0x48, 0x60, 0x6c, 0 };
44
45static u8 adhoc_rates_bg[BG_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96,
46 0x0c, 0x12, 0x18, 0x24,
47 0x30, 0x48, 0x60, 0x6c, 0 };
48
49static u8 adhoc_rates_a[A_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
50 0xb0, 0x48, 0x60, 0x6c, 0 };
51u8 supported_rates_a[A_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
52 0xb0, 0x48, 0x60, 0x6c, 0 };
53static 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
60u8 supported_rates_b[B_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x16, 0 };
61
62u8 supported_rates_g[G_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
63 0x30, 0x48, 0x60, 0x6c, 0 };
64
65u8 supported_rates_bg[BG_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x0c,
66 0x12, 0x16, 0x18, 0x24, 0x30, 0x48,
67 0x60, 0x6c, 0 };
68
69u16 region_code_index[MWIFIEX_MAX_REGION_CODE] = { 0x10, 0x20, 0x30,
70 0x32, 0x40, 0x41, 0xff };
71
72u8 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 */
78u32 mwifiex_index_to_data_rate(u8 index, u8 ht_info)
79{
80 u16 mcs_rate[4][8] = {
81 {0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e}
82 , /* LG 40M */
83 {0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c}
84 , /* SG 40M */
85 {0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82}
86 , /* LG 20M */
87 {0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90}
88 }; /* SG 20M */
89
90 u32 rate;
91
92 if (ht_info & BIT(0)) {
93 if (index == MWIFIEX_RATE_BITMAP_MCS0) {
94 if (ht_info & BIT(2))
95 rate = 0x0D; /* MCS 32 SGI rate */
96 else
97 rate = 0x0C; /* MCS 32 LGI rate */
98 } else if (index < 8) {
99 if (ht_info & BIT(1)) {
100 if (ht_info & BIT(2))
101 /* SGI, 40M */
102 rate = mcs_rate[1][index];
103 else
104 /* LGI, 40M */
105 rate = mcs_rate[0][index];
106 } else {
107 if (ht_info & BIT(2))
108 /* SGI, 20M */
109 rate = mcs_rate[3][index];
110 else
111 /* LGI, 20M */
112 rate = mcs_rate[2][index];
113 }
114 } else
115 rate = mwifiex_data_rates[0];
116 } else {
117 if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
118 index = 0;
119 rate = mwifiex_data_rates[index];
120 }
121 return rate;
122}
123
124/*
125 * This function maps a data rate value into corresponding index in supported
126 * rates table.
127 */
128u8 mwifiex_data_rate_to_index(u32 rate)
129{
130 u16 *ptr;
131
132 if (rate) {
133 ptr = memchr(mwifiex_data_rates, rate,
134 sizeof(mwifiex_data_rates));
135 if (ptr)
136 return (u8) (ptr - mwifiex_data_rates);
137 }
138 return 0;
139}
140
141/*
142 * This function returns the current active data rates.
143 *
144 * The result may vary depending upon connection status.
145 */
146u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
147{
148 if (!priv->media_connected)
149 return mwifiex_get_supported_rates(priv, rates);
150 else
151 return mwifiex_copy_rates(rates, 0,
152 priv->curr_bss_params.data_rates,
153 priv->curr_bss_params.num_of_rates);
154}
155
156/*
157 * This function locates the Channel-Frequency-Power triplet based upon
158 * band and channel parameters.
159 */
160struct mwifiex_chan_freq_power *
161mwifiex_get_cfp_by_band_and_channel_from_cfg80211(struct mwifiex_private
162 *priv, u8 band, u16 channel)
163{
164 struct mwifiex_chan_freq_power *cfp = NULL;
165 struct ieee80211_supported_band *sband;
166 struct ieee80211_channel *ch;
167 int i;
168
169 if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
170 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
171 else
172 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
173
174 if (!sband) {
175 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
176 " & channel %d\n", __func__, band, channel);
177 return cfp;
178 }
179
180 for (i = 0; i < sband->n_channels; i++) {
181 ch = &sband->channels[i];
182 if (((ch->hw_value == channel) ||
183 (channel == FIRST_VALID_CHANNEL))
184 && !(ch->flags & IEEE80211_CHAN_DISABLED)) {
185 priv->cfp.channel = channel;
186 priv->cfp.freq = ch->center_freq;
187 priv->cfp.max_tx_power = ch->max_power;
188 cfp = &priv->cfp;
189 break;
190 }
191 }
192 if (i == sband->n_channels)
193 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
194 " & channel %d\n", __func__, band, channel);
195
196 return cfp;
197}
198
199/*
200 * This function locates the Channel-Frequency-Power triplet based upon
201 * band and frequency parameters.
202 */
203struct mwifiex_chan_freq_power *
204mwifiex_get_cfp_by_band_and_freq_from_cfg80211(struct mwifiex_private *priv,
205 u8 band, u32 freq)
206{
207 struct mwifiex_chan_freq_power *cfp = NULL;
208 struct ieee80211_supported_band *sband;
209 struct ieee80211_channel *ch;
210 int i;
211
212 if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
213 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
214 else
215 sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
216
217 if (!sband) {
218 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
219 " & freq %d\n", __func__, band, freq);
220 return cfp;
221 }
222
223 for (i = 0; i < sband->n_channels; i++) {
224 ch = &sband->channels[i];
225 if ((ch->center_freq == freq) &&
226 !(ch->flags & IEEE80211_CHAN_DISABLED)) {
227 priv->cfp.channel = ch->hw_value;
228 priv->cfp.freq = freq;
229 priv->cfp.max_tx_power = ch->max_power;
230 cfp = &priv->cfp;
231 break;
232 }
233 }
234 if (i == sband->n_channels)
235 dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
236 " & freq %d\n", __func__, band, freq);
237
238 return cfp;
239}
240
241/*
242 * This function checks if the data rate is set to auto.
243 */
244u8
245mwifiex_is_rate_auto(struct mwifiex_private *priv)
246{
247 u32 i;
248 int rate_num = 0;
249
250 for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
251 if (priv->bitmap_rates[i])
252 rate_num++;
253
254 if (rate_num > 1)
255 return true;
256 else
257 return false;
258}
259
260/*
261 * This function converts rate bitmap into rate index.
262 */
263int mwifiex_get_rate_index(u16 *rate_bitmap, int size)
264{
265 int i;
266
267 for (i = 0; i < size * 8; i++)
268 if (rate_bitmap[i / 16] & (1 << (i % 16)))
269 return i;
270
271 return 0;
272}
273
274/*
275 * This function gets the supported data rates.
276 *
277 * The function works in both Ad-Hoc and infra mode by printing the
278 * band and returning the data rates.
279 */
280u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
281{
282 u32 k = 0;
283 struct mwifiex_adapter *adapter = priv->adapter;
284 if (priv->bss_mode == NL80211_IFTYPE_STATION) {
285 switch (adapter->config_bands) {
286 case BAND_B:
287 dev_dbg(adapter->dev, "info: infra band=%d "
288 "supported_rates_b\n", adapter->config_bands);
289 k = mwifiex_copy_rates(rates, k, supported_rates_b,
290 sizeof(supported_rates_b));
291 break;
292 case BAND_G:
293 case BAND_G | BAND_GN:
294 dev_dbg(adapter->dev, "info: infra band=%d "
295 "supported_rates_g\n", adapter->config_bands);
296 k = mwifiex_copy_rates(rates, k, supported_rates_g,
297 sizeof(supported_rates_g));
298 break;
299 case BAND_B | BAND_G:
300 case BAND_A | BAND_B | BAND_G:
301 case BAND_A | BAND_B:
302 case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
303 case BAND_B | BAND_G | BAND_GN:
304 dev_dbg(adapter->dev, "info: infra band=%d "
305 "supported_rates_bg\n", adapter->config_bands);
306 k = mwifiex_copy_rates(rates, k, supported_rates_bg,
307 sizeof(supported_rates_bg));
308 break;
309 case BAND_A:
310 case BAND_A | BAND_G:
311 dev_dbg(adapter->dev, "info: infra band=%d "
312 "supported_rates_a\n", adapter->config_bands);
313 k = mwifiex_copy_rates(rates, k, supported_rates_a,
314 sizeof(supported_rates_a));
315 break;
316 case BAND_A | BAND_AN:
317 case BAND_A | BAND_G | BAND_AN | BAND_GN:
318 dev_dbg(adapter->dev, "info: infra band=%d "
319 "supported_rates_a\n", adapter->config_bands);
320 k = mwifiex_copy_rates(rates, k, supported_rates_a,
321 sizeof(supported_rates_a));
322 break;
323 case BAND_GN:
324 dev_dbg(adapter->dev, "info: infra band=%d "
325 "supported_rates_n\n", adapter->config_bands);
326 k = mwifiex_copy_rates(rates, k, supported_rates_n,
327 sizeof(supported_rates_n));
328 break;
329 }
330 } else {
331 /* Ad-hoc mode */
332 switch (adapter->adhoc_start_band) {
333 case BAND_B:
334 dev_dbg(adapter->dev, "info: adhoc B\n");
335 k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
336 sizeof(adhoc_rates_b));
337 break;
338 case BAND_G:
339 case BAND_G | BAND_GN:
340 dev_dbg(adapter->dev, "info: adhoc G only\n");
341 k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
342 sizeof(adhoc_rates_g));
343 break;
344 case BAND_B | BAND_G:
345 case BAND_B | BAND_G | BAND_GN:
346 dev_dbg(adapter->dev, "info: adhoc BG\n");
347 k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
348 sizeof(adhoc_rates_bg));
349 break;
350 case BAND_A:
351 case BAND_A | BAND_AN:
352 dev_dbg(adapter->dev, "info: adhoc A\n");
353 k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
354 sizeof(adhoc_rates_a));
355 break;
356 }
357 }
358
359 return k;
360}