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cfp.c
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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 
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 struct region_code_mapping {
75  u8 code;
76  u8 region[IEEE80211_COUNTRY_STRING_LEN];
77 };
78 
79 static struct region_code_mapping region_code_mapping_t[] = {
80  { 0x10, "US " }, /* US FCC */
81  { 0x20, "CA " }, /* IC Canada */
82  { 0x30, "EU " }, /* ETSI */
83  { 0x31, "ES " }, /* Spain */
84  { 0x32, "FR " }, /* France */
85  { 0x40, "JP " }, /* Japan */
86  { 0x41, "JP " }, /* Japan */
87  { 0x50, "CN " }, /* China */
88 };
89 
90 /* This function converts integer code to region string */
91 u8 *mwifiex_11d_code_2_region(u8 code)
92 {
93  u8 i;
94  u8 size = sizeof(region_code_mapping_t)/
95  sizeof(struct region_code_mapping);
96 
97  /* Look for code in mapping table */
98  for (i = 0; i < size; i++)
99  if (region_code_mapping_t[i].code == code)
100  return region_code_mapping_t[i].region;
101 
102  return NULL;
103 }
104 
105 /*
106  * This function maps an index in supported rates table into
107  * the corresponding data rate.
108  */
109 u32 mwifiex_index_to_data_rate(struct mwifiex_private *priv, u8 index,
110  u8 ht_info)
111 {
112  /*
113  * For every mcs_rate line, the first 8 bytes are for stream 1x1,
114  * and all 16 bytes are for stream 2x2.
115  */
116  u16 mcs_rate[4][16] = {
117  /* LGI 40M */
118  { 0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e,
119  0x36, 0x6c, 0xa2, 0xd8, 0x144, 0x1b0, 0x1e6, 0x21c },
120 
121  /* SGI 40M */
122  { 0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c,
123  0x3c, 0x78, 0xb4, 0xf0, 0x168, 0x1e0, 0x21c, 0x258 },
124 
125  /* LGI 20M */
126  { 0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82,
127  0x1a, 0x34, 0x4e, 0x68, 0x9c, 0xd0, 0xea, 0x104 },
128 
129  /* SGI 20M */
130  { 0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90,
131  0x1c, 0x39, 0x56, 0x73, 0xad, 0xe7, 0x104, 0x120 }
132  };
133  u32 mcs_num_supp =
134  (priv->adapter->hw_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
135  u32 rate;
136 
137  if (ht_info & BIT(0)) {
138  if (index == MWIFIEX_RATE_BITMAP_MCS0) {
139  if (ht_info & BIT(2))
140  rate = 0x0D; /* MCS 32 SGI rate */
141  else
142  rate = 0x0C; /* MCS 32 LGI rate */
143  } else if (index < mcs_num_supp) {
144  if (ht_info & BIT(1)) {
145  if (ht_info & BIT(2))
146  /* SGI, 40M */
147  rate = mcs_rate[1][index];
148  else
149  /* LGI, 40M */
150  rate = mcs_rate[0][index];
151  } else {
152  if (ht_info & BIT(2))
153  /* SGI, 20M */
154  rate = mcs_rate[3][index];
155  else
156  /* LGI, 20M */
157  rate = mcs_rate[2][index];
158  }
159  } else
160  rate = mwifiex_data_rates[0];
161  } else {
162  if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
163  index = 0;
164  rate = mwifiex_data_rates[index];
165  }
166  return rate;
167 }
168 
169 /*
170  * This function returns the current active data rates.
171  *
172  * The result may vary depending upon connection status.
173  */
174 u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
175 {
176  if (!priv->media_connected)
177  return mwifiex_get_supported_rates(priv, rates);
178  else
179  return mwifiex_copy_rates(rates, 0,
180  priv->curr_bss_params.data_rates,
181  priv->curr_bss_params.num_of_rates);
182 }
183 
184 /*
185  * This function locates the Channel-Frequency-Power triplet based upon
186  * band and channel/frequency parameters.
187  */
188 struct mwifiex_chan_freq_power *
189 mwifiex_get_cfp(struct mwifiex_private *priv, u8 band, u16 channel, u32 freq)
190 {
191  struct mwifiex_chan_freq_power *cfp = NULL;
192  struct ieee80211_supported_band *sband;
193  struct ieee80211_channel *ch = NULL;
194  int i;
195 
196  if (!channel && !freq)
197  return cfp;
198 
199  if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
200  sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
201  else
202  sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
203 
204  if (!sband) {
205  dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d\n",
206  __func__, band);
207  return cfp;
208  }
209 
210  for (i = 0; i < sband->n_channels; i++) {
211  ch = &sband->channels[i];
212 
213  if (ch->flags & IEEE80211_CHAN_DISABLED)
214  continue;
215 
216  if (freq) {
217  if (ch->center_freq == freq)
218  break;
219  } else {
220  /* find by valid channel*/
221  if (ch->hw_value == channel ||
222  channel == FIRST_VALID_CHANNEL)
223  break;
224  }
225  }
226  if (i == sband->n_channels) {
227  dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
228  " & channel=%d freq=%d\n", __func__, band, channel,
229  freq);
230  } else {
231  if (!ch)
232  return cfp;
233 
234  priv->cfp.channel = ch->hw_value;
235  priv->cfp.freq = ch->center_freq;
236  priv->cfp.max_tx_power = ch->max_power;
237  cfp = &priv->cfp;
238  }
239 
240  return cfp;
241 }
242 
243 /*
244  * This function checks if the data rate is set to auto.
245  */
246 u8
247 mwifiex_is_rate_auto(struct mwifiex_private *priv)
248 {
249  u32 i;
250  int rate_num = 0;
251 
252  for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
253  if (priv->bitmap_rates[i])
254  rate_num++;
255 
256  if (rate_num > 1)
257  return true;
258  else
259  return false;
260 }
261 
262 /*
263  * This function gets the supported data rates.
264  *
265  * The function works in both Ad-Hoc and infra mode by printing the
266  * band and returning the data rates.
267  */
268 u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
269 {
270  u32 k = 0;
271  struct mwifiex_adapter *adapter = priv->adapter;
272  if (priv->bss_mode == NL80211_IFTYPE_STATION) {
273  switch (adapter->config_bands) {
274  case BAND_B:
275  dev_dbg(adapter->dev, "info: infra band=%d "
276  "supported_rates_b\n", adapter->config_bands);
277  k = mwifiex_copy_rates(rates, k, supported_rates_b,
278  sizeof(supported_rates_b));
279  break;
280  case BAND_G:
281  case BAND_G | BAND_GN:
282  dev_dbg(adapter->dev, "info: infra band=%d "
283  "supported_rates_g\n", adapter->config_bands);
284  k = mwifiex_copy_rates(rates, k, supported_rates_g,
285  sizeof(supported_rates_g));
286  break;
287  case BAND_B | BAND_G:
288  case BAND_A | BAND_B | BAND_G:
289  case BAND_A | BAND_B:
290  case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
291  case BAND_B | BAND_G | BAND_GN:
292  dev_dbg(adapter->dev, "info: infra band=%d "
293  "supported_rates_bg\n", adapter->config_bands);
294  k = mwifiex_copy_rates(rates, k, supported_rates_bg,
295  sizeof(supported_rates_bg));
296  break;
297  case BAND_A:
298  case BAND_A | BAND_G:
299  dev_dbg(adapter->dev, "info: infra band=%d "
300  "supported_rates_a\n", adapter->config_bands);
301  k = mwifiex_copy_rates(rates, k, supported_rates_a,
302  sizeof(supported_rates_a));
303  break;
304  case BAND_A | BAND_AN:
305  case BAND_A | BAND_G | BAND_AN | BAND_GN:
306  dev_dbg(adapter->dev, "info: infra band=%d "
307  "supported_rates_a\n", adapter->config_bands);
308  k = mwifiex_copy_rates(rates, k, supported_rates_a,
309  sizeof(supported_rates_a));
310  break;
311  case BAND_GN:
312  dev_dbg(adapter->dev, "info: infra band=%d "
313  "supported_rates_n\n", adapter->config_bands);
314  k = mwifiex_copy_rates(rates, k, supported_rates_n,
315  sizeof(supported_rates_n));
316  break;
317  }
318  } else {
319  /* Ad-hoc mode */
320  switch (adapter->adhoc_start_band) {
321  case BAND_B:
322  dev_dbg(adapter->dev, "info: adhoc B\n");
323  k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
324  sizeof(adhoc_rates_b));
325  break;
326  case BAND_G:
327  case BAND_G | BAND_GN:
328  dev_dbg(adapter->dev, "info: adhoc G only\n");
329  k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
330  sizeof(adhoc_rates_g));
331  break;
332  case BAND_B | BAND_G:
333  case BAND_B | BAND_G | BAND_GN:
334  dev_dbg(adapter->dev, "info: adhoc BG\n");
335  k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
336  sizeof(adhoc_rates_bg));
337  break;
338  case BAND_A:
339  case BAND_A | BAND_AN:
340  dev_dbg(adapter->dev, "info: adhoc A\n");
341  k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
342  sizeof(adhoc_rates_a));
343  break;
344  }
345  }
346 
347  return k;
348 }
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