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iwlwifi: move iwl4965_set_rxon_ht into iwlcore
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-core.c
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 *
24 * Contact Information:
25 * Tomas Winkler <tomas.winkler@intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/version.h>
32 #include <net/mac80211.h>
33
34 struct iwl_priv; /* FIXME: remove */
35 #include "iwl-debug.h"
36 #include "iwl-eeprom.h"
37 #include "iwl-dev.h" /* FIXME: remove */
38 #include "iwl-core.h"
39 #include "iwl-io.h"
40 #include "iwl-rfkill.h"
41 #include "iwl-power.h"
42
43
44 MODULE_DESCRIPTION("iwl core");
45 MODULE_VERSION(IWLWIFI_VERSION);
46 MODULE_AUTHOR(DRV_COPYRIGHT);
47 MODULE_LICENSE("GPL");
48
49 #ifdef CONFIG_IWLWIFI_DEBUG
50 u32 iwl_debug_level;
51 EXPORT_SYMBOL(iwl_debug_level);
52 #endif
53
54 #define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
55 [IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
56 IWL_RATE_SISO_##s##M_PLCP, \
57 IWL_RATE_MIMO2_##s##M_PLCP,\
58 IWL_RATE_MIMO3_##s##M_PLCP,\
59 IWL_RATE_##r##M_IEEE, \
60 IWL_RATE_##ip##M_INDEX, \
61 IWL_RATE_##in##M_INDEX, \
62 IWL_RATE_##rp##M_INDEX, \
63 IWL_RATE_##rn##M_INDEX, \
64 IWL_RATE_##pp##M_INDEX, \
65 IWL_RATE_##np##M_INDEX }
66
67 /*
68 * Parameter order:
69 * rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
70 *
71 * If there isn't a valid next or previous rate then INV is used which
72 * maps to IWL_RATE_INVALID
73 *
74 */
75 const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
76 IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
77 IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
78 IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
79 IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
80 IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
81 IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
82 IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
83 IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
84 IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
85 IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
86 IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
87 IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
88 IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
89 /* FIXME:RS: ^^ should be INV (legacy) */
90 };
91 EXPORT_SYMBOL(iwl4965_rates);
92
93 /* This function both allocates and initializes hw and priv. */
94 struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
95 struct ieee80211_ops *hw_ops)
96 {
97 struct iwl_priv *priv;
98
99 /* mac80211 allocates memory for this device instance, including
100 * space for this driver's private structure */
101 struct ieee80211_hw *hw =
102 ieee80211_alloc_hw(sizeof(struct iwl_priv), hw_ops);
103 if (hw == NULL) {
104 IWL_ERROR("Can not allocate network device\n");
105 goto out;
106 }
107
108 priv = hw->priv;
109 priv->hw = hw;
110
111 out:
112 return hw;
113 }
114 EXPORT_SYMBOL(iwl_alloc_all);
115
116 void iwl_hw_detect(struct iwl_priv *priv)
117 {
118 priv->hw_rev = _iwl_read32(priv, CSR_HW_REV);
119 priv->hw_wa_rev = _iwl_read32(priv, CSR_HW_REV_WA_REG);
120 pci_read_config_byte(priv->pci_dev, PCI_REVISION_ID, &priv->rev_id);
121 }
122 EXPORT_SYMBOL(iwl_hw_detect);
123
124 /**
125 * iwlcore_clear_stations_table - Clear the driver's station table
126 *
127 * NOTE: This does not clear or otherwise alter the device's station table.
128 */
129 void iwlcore_clear_stations_table(struct iwl_priv *priv)
130 {
131 unsigned long flags;
132
133 spin_lock_irqsave(&priv->sta_lock, flags);
134
135 priv->num_stations = 0;
136 memset(priv->stations, 0, sizeof(priv->stations));
137
138 spin_unlock_irqrestore(&priv->sta_lock, flags);
139 }
140 EXPORT_SYMBOL(iwlcore_clear_stations_table);
141
142 void iwl_reset_qos(struct iwl_priv *priv)
143 {
144 u16 cw_min = 15;
145 u16 cw_max = 1023;
146 u8 aifs = 2;
147 u8 is_legacy = 0;
148 unsigned long flags;
149 int i;
150
151 spin_lock_irqsave(&priv->lock, flags);
152 priv->qos_data.qos_active = 0;
153
154 if (priv->iw_mode == IEEE80211_IF_TYPE_IBSS) {
155 if (priv->qos_data.qos_enable)
156 priv->qos_data.qos_active = 1;
157 if (!(priv->active_rate & 0xfff0)) {
158 cw_min = 31;
159 is_legacy = 1;
160 }
161 } else if (priv->iw_mode == IEEE80211_IF_TYPE_AP) {
162 if (priv->qos_data.qos_enable)
163 priv->qos_data.qos_active = 1;
164 } else if (!(priv->staging_rxon.flags & RXON_FLG_SHORT_SLOT_MSK)) {
165 cw_min = 31;
166 is_legacy = 1;
167 }
168
169 if (priv->qos_data.qos_active)
170 aifs = 3;
171
172 priv->qos_data.def_qos_parm.ac[0].cw_min = cpu_to_le16(cw_min);
173 priv->qos_data.def_qos_parm.ac[0].cw_max = cpu_to_le16(cw_max);
174 priv->qos_data.def_qos_parm.ac[0].aifsn = aifs;
175 priv->qos_data.def_qos_parm.ac[0].edca_txop = 0;
176 priv->qos_data.def_qos_parm.ac[0].reserved1 = 0;
177
178 if (priv->qos_data.qos_active) {
179 i = 1;
180 priv->qos_data.def_qos_parm.ac[i].cw_min = cpu_to_le16(cw_min);
181 priv->qos_data.def_qos_parm.ac[i].cw_max = cpu_to_le16(cw_max);
182 priv->qos_data.def_qos_parm.ac[i].aifsn = 7;
183 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
184 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
185
186 i = 2;
187 priv->qos_data.def_qos_parm.ac[i].cw_min =
188 cpu_to_le16((cw_min + 1) / 2 - 1);
189 priv->qos_data.def_qos_parm.ac[i].cw_max =
190 cpu_to_le16(cw_max);
191 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
192 if (is_legacy)
193 priv->qos_data.def_qos_parm.ac[i].edca_txop =
194 cpu_to_le16(6016);
195 else
196 priv->qos_data.def_qos_parm.ac[i].edca_txop =
197 cpu_to_le16(3008);
198 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
199
200 i = 3;
201 priv->qos_data.def_qos_parm.ac[i].cw_min =
202 cpu_to_le16((cw_min + 1) / 4 - 1);
203 priv->qos_data.def_qos_parm.ac[i].cw_max =
204 cpu_to_le16((cw_max + 1) / 2 - 1);
205 priv->qos_data.def_qos_parm.ac[i].aifsn = 2;
206 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
207 if (is_legacy)
208 priv->qos_data.def_qos_parm.ac[i].edca_txop =
209 cpu_to_le16(3264);
210 else
211 priv->qos_data.def_qos_parm.ac[i].edca_txop =
212 cpu_to_le16(1504);
213 } else {
214 for (i = 1; i < 4; i++) {
215 priv->qos_data.def_qos_parm.ac[i].cw_min =
216 cpu_to_le16(cw_min);
217 priv->qos_data.def_qos_parm.ac[i].cw_max =
218 cpu_to_le16(cw_max);
219 priv->qos_data.def_qos_parm.ac[i].aifsn = aifs;
220 priv->qos_data.def_qos_parm.ac[i].edca_txop = 0;
221 priv->qos_data.def_qos_parm.ac[i].reserved1 = 0;
222 }
223 }
224 IWL_DEBUG_QOS("set QoS to default \n");
225
226 spin_unlock_irqrestore(&priv->lock, flags);
227 }
228 EXPORT_SYMBOL(iwl_reset_qos);
229
230 #ifdef CONFIG_IWL4965_HT
231 static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
232 struct ieee80211_ht_info *ht_info,
233 enum ieee80211_band band)
234 {
235 ht_info->cap = 0;
236 memset(ht_info->supp_mcs_set, 0, 16);
237
238 ht_info->ht_supported = 1;
239
240 if (priv->hw_params.fat_channel & BIT(band)) {
241 ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
242 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
243 ht_info->supp_mcs_set[4] = 0x01;
244 }
245 ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
246 ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
247 ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
248 (IWL_MIMO_PS_NONE << 2));
249
250 if (priv->cfg->mod_params->amsdu_size_8K)
251 ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
252
253 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
254 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
255
256 ht_info->supp_mcs_set[0] = 0xFF;
257 if (priv->hw_params.tx_chains_num >= 2)
258 ht_info->supp_mcs_set[1] = 0xFF;
259 if (priv->hw_params.tx_chains_num >= 3)
260 ht_info->supp_mcs_set[2] = 0xFF;
261 }
262 #else
263 static inline void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
264 struct ieee80211_ht_info *ht_info,
265 enum ieee80211_band band)
266 {
267 }
268 #endif /* CONFIG_IWL4965_HT */
269
270 static void iwlcore_init_hw_rates(struct iwl_priv *priv,
271 struct ieee80211_rate *rates)
272 {
273 int i;
274
275 for (i = 0; i < IWL_RATE_COUNT; i++) {
276 rates[i].bitrate = iwl4965_rates[i].ieee * 5;
277 rates[i].hw_value = i; /* Rate scaling will work on indexes */
278 rates[i].hw_value_short = i;
279 rates[i].flags = 0;
280 if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
281 /*
282 * If CCK != 1M then set short preamble rate flag.
283 */
284 rates[i].flags |=
285 (iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
286 0 : IEEE80211_RATE_SHORT_PREAMBLE;
287 }
288 }
289 }
290
291 /**
292 * iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
293 */
294 static int iwlcore_init_geos(struct iwl_priv *priv)
295 {
296 struct iwl_channel_info *ch;
297 struct ieee80211_supported_band *sband;
298 struct ieee80211_channel *channels;
299 struct ieee80211_channel *geo_ch;
300 struct ieee80211_rate *rates;
301 int i = 0;
302
303 if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
304 priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
305 IWL_DEBUG_INFO("Geography modes already initialized.\n");
306 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
307 return 0;
308 }
309
310 channels = kzalloc(sizeof(struct ieee80211_channel) *
311 priv->channel_count, GFP_KERNEL);
312 if (!channels)
313 return -ENOMEM;
314
315 rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
316 GFP_KERNEL);
317 if (!rates) {
318 kfree(channels);
319 return -ENOMEM;
320 }
321
322 /* 5.2GHz channels start after the 2.4GHz channels */
323 sband = &priv->bands[IEEE80211_BAND_5GHZ];
324 sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
325 /* just OFDM */
326 sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
327 sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
328
329 iwlcore_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
330
331 sband = &priv->bands[IEEE80211_BAND_2GHZ];
332 sband->channels = channels;
333 /* OFDM & CCK */
334 sband->bitrates = rates;
335 sband->n_bitrates = IWL_RATE_COUNT;
336
337 iwlcore_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
338
339 priv->ieee_channels = channels;
340 priv->ieee_rates = rates;
341
342 iwlcore_init_hw_rates(priv, rates);
343
344 for (i = 0; i < priv->channel_count; i++) {
345 ch = &priv->channel_info[i];
346
347 /* FIXME: might be removed if scan is OK */
348 if (!is_channel_valid(ch))
349 continue;
350
351 if (is_channel_a_band(ch))
352 sband = &priv->bands[IEEE80211_BAND_5GHZ];
353 else
354 sband = &priv->bands[IEEE80211_BAND_2GHZ];
355
356 geo_ch = &sband->channels[sband->n_channels++];
357
358 geo_ch->center_freq =
359 ieee80211_channel_to_frequency(ch->channel);
360 geo_ch->max_power = ch->max_power_avg;
361 geo_ch->max_antenna_gain = 0xff;
362 geo_ch->hw_value = ch->channel;
363
364 if (is_channel_valid(ch)) {
365 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
366 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
367
368 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
369 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
370
371 if (ch->flags & EEPROM_CHANNEL_RADAR)
372 geo_ch->flags |= IEEE80211_CHAN_RADAR;
373
374 if (ch->max_power_avg > priv->max_channel_txpower_limit)
375 priv->max_channel_txpower_limit =
376 ch->max_power_avg;
377 } else {
378 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
379 }
380
381 /* Save flags for reg domain usage */
382 geo_ch->orig_flags = geo_ch->flags;
383
384 IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
385 ch->channel, geo_ch->center_freq,
386 is_channel_a_band(ch) ? "5.2" : "2.4",
387 geo_ch->flags & IEEE80211_CHAN_DISABLED ?
388 "restricted" : "valid",
389 geo_ch->flags);
390 }
391
392 if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
393 priv->cfg->sku & IWL_SKU_A) {
394 printk(KERN_INFO DRV_NAME
395 ": Incorrectly detected BG card as ABG. Please send "
396 "your PCI ID 0x%04X:0x%04X to maintainer.\n",
397 priv->pci_dev->device, priv->pci_dev->subsystem_device);
398 priv->cfg->sku &= ~IWL_SKU_A;
399 }
400
401 printk(KERN_INFO DRV_NAME
402 ": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
403 priv->bands[IEEE80211_BAND_2GHZ].n_channels,
404 priv->bands[IEEE80211_BAND_5GHZ].n_channels);
405
406 if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
407 priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
408 &priv->bands[IEEE80211_BAND_2GHZ];
409 if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
410 priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
411 &priv->bands[IEEE80211_BAND_5GHZ];
412
413 set_bit(STATUS_GEO_CONFIGURED, &priv->status);
414
415 return 0;
416 }
417
418 /*
419 * iwlcore_free_geos - undo allocations in iwlcore_init_geos
420 */
421 void iwlcore_free_geos(struct iwl_priv *priv)
422 {
423 kfree(priv->ieee_channels);
424 kfree(priv->ieee_rates);
425 clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
426 }
427 EXPORT_SYMBOL(iwlcore_free_geos);
428
429 #ifdef CONFIG_IWL4965_HT
430 static u8 is_single_rx_stream(struct iwl_priv *priv)
431 {
432 return !priv->current_ht_config.is_ht ||
433 ((priv->current_ht_config.supp_mcs_set[1] == 0) &&
434 (priv->current_ht_config.supp_mcs_set[2] == 0)) ||
435 priv->ps_mode == IWL_MIMO_PS_STATIC;
436 }
437 static u8 iwl_is_channel_extension(struct iwl_priv *priv,
438 enum ieee80211_band band,
439 u16 channel, u8 extension_chan_offset)
440 {
441 const struct iwl_channel_info *ch_info;
442
443 ch_info = iwl_get_channel_info(priv, band, channel);
444 if (!is_channel_valid(ch_info))
445 return 0;
446
447 if (extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE)
448 return 0;
449
450 if ((ch_info->fat_extension_channel == extension_chan_offset) ||
451 (ch_info->fat_extension_channel == HT_IE_EXT_CHANNEL_MAX))
452 return 1;
453
454 return 0;
455 }
456
457 u8 iwl_is_fat_tx_allowed(struct iwl_priv *priv,
458 struct ieee80211_ht_info *sta_ht_inf)
459 {
460 struct iwl_ht_info *iwl_ht_conf = &priv->current_ht_config;
461
462 if ((!iwl_ht_conf->is_ht) ||
463 (iwl_ht_conf->supported_chan_width != IWL_CHANNEL_WIDTH_40MHZ) ||
464 (iwl_ht_conf->extension_chan_offset == IWL_EXT_CHANNEL_OFFSET_NONE))
465 return 0;
466
467 if (sta_ht_inf) {
468 if ((!sta_ht_inf->ht_supported) ||
469 (!(sta_ht_inf->cap & IEEE80211_HT_CAP_SUP_WIDTH)))
470 return 0;
471 }
472
473 return iwl_is_channel_extension(priv, priv->band,
474 iwl_ht_conf->control_channel,
475 iwl_ht_conf->extension_chan_offset);
476 }
477 EXPORT_SYMBOL(iwl_is_fat_tx_allowed);
478
479 void iwl_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
480 {
481 struct iwl4965_rxon_cmd *rxon = &priv->staging_rxon;
482 u32 val;
483
484 if (!ht_info->is_ht)
485 return;
486
487 /* Set up channel bandwidth: 20 MHz only, or 20/40 mixed if fat ok */
488 if (iwl_is_fat_tx_allowed(priv, NULL))
489 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED_MSK;
490 else
491 rxon->flags &= ~(RXON_FLG_CHANNEL_MODE_MIXED_MSK |
492 RXON_FLG_CHANNEL_MODE_PURE_40_MSK);
493
494 if (le16_to_cpu(rxon->channel) != ht_info->control_channel) {
495 IWL_DEBUG_ASSOC("control diff than current %d %d\n",
496 le16_to_cpu(rxon->channel),
497 ht_info->control_channel);
498 rxon->channel = cpu_to_le16(ht_info->control_channel);
499 return;
500 }
501
502 /* Note: control channel is opposite of extension channel */
503 switch (ht_info->extension_chan_offset) {
504 case IWL_EXT_CHANNEL_OFFSET_ABOVE:
505 rxon->flags &= ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
506 break;
507 case IWL_EXT_CHANNEL_OFFSET_BELOW:
508 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
509 break;
510 case IWL_EXT_CHANNEL_OFFSET_NONE:
511 default:
512 rxon->flags &= ~RXON_FLG_CHANNEL_MODE_MIXED_MSK;
513 break;
514 }
515
516 val = ht_info->ht_protection;
517
518 rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
519
520 iwl_set_rxon_chain(priv);
521
522 IWL_DEBUG_ASSOC("supported HT rate 0x%X 0x%X 0x%X "
523 "rxon flags 0x%X operation mode :0x%X "
524 "extension channel offset 0x%x "
525 "control chan %d\n",
526 ht_info->supp_mcs_set[0],
527 ht_info->supp_mcs_set[1],
528 ht_info->supp_mcs_set[2],
529 le32_to_cpu(rxon->flags), ht_info->ht_protection,
530 ht_info->extension_chan_offset,
531 ht_info->control_channel);
532 return;
533 }
534 EXPORT_SYMBOL(iwl_set_rxon_ht);
535
536 #else
537 static inline u8 is_single_rx_stream(struct iwl_priv *priv)
538 {
539 return 1;
540 }
541 #endif /*CONFIG_IWL4965_HT */
542
543 /*
544 * Determine how many receiver/antenna chains to use.
545 * More provides better reception via diversity. Fewer saves power.
546 * MIMO (dual stream) requires at least 2, but works better with 3.
547 * This does not determine *which* chains to use, just how many.
548 */
549 static int iwlcore_get_rx_chain_counter(struct iwl_priv *priv,
550 u8 *idle_state, u8 *rx_state)
551 {
552 u8 is_single = is_single_rx_stream(priv);
553 u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
554
555 /* # of Rx chains to use when expecting MIMO. */
556 if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
557 *rx_state = 2;
558 else
559 *rx_state = 3;
560
561 /* # Rx chains when idling and maybe trying to save power */
562 switch (priv->ps_mode) {
563 case IWL_MIMO_PS_STATIC:
564 case IWL_MIMO_PS_DYNAMIC:
565 *idle_state = (is_cam) ? 2 : 1;
566 break;
567 case IWL_MIMO_PS_NONE:
568 *idle_state = (is_cam) ? *rx_state : 1;
569 break;
570 default:
571 *idle_state = 1;
572 break;
573 }
574
575 return 0;
576 }
577
578 /**
579 * iwl_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
580 *
581 * Selects how many and which Rx receivers/antennas/chains to use.
582 * This should not be used for scan command ... it puts data in wrong place.
583 */
584 void iwl_set_rxon_chain(struct iwl_priv *priv)
585 {
586 u8 is_single = is_single_rx_stream(priv);
587 u8 idle_state, rx_state;
588
589 priv->staging_rxon.rx_chain = 0;
590 rx_state = idle_state = 3;
591
592 /* Tell uCode which antennas are actually connected.
593 * Before first association, we assume all antennas are connected.
594 * Just after first association, iwl_chain_noise_calibration()
595 * checks which antennas actually *are* connected. */
596 priv->staging_rxon.rx_chain |=
597 cpu_to_le16(priv->hw_params.valid_rx_ant <<
598 RXON_RX_CHAIN_VALID_POS);
599
600 /* How many receivers should we use? */
601 iwlcore_get_rx_chain_counter(priv, &idle_state, &rx_state);
602 priv->staging_rxon.rx_chain |=
603 cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
604 priv->staging_rxon.rx_chain |=
605 cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
606
607 if (!is_single && (rx_state >= 2) &&
608 !test_bit(STATUS_POWER_PMI, &priv->status))
609 priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
610 else
611 priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
612
613 IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
614 }
615 EXPORT_SYMBOL(iwl_set_rxon_chain);
616
617 /**
618 * iwlcore_set_rxon_channel - Set the phymode and channel values in staging RXON
619 * @phymode: MODE_IEEE80211A sets to 5.2GHz; all else set to 2.4GHz
620 * @channel: Any channel valid for the requested phymode
621
622 * In addition to setting the staging RXON, priv->phymode is also set.
623 *
624 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
625 * in the staging RXON flag structure based on the phymode
626 */
627 int iwl_set_rxon_channel(struct iwl_priv *priv,
628 enum ieee80211_band band,
629 u16 channel)
630 {
631 if (!iwl_get_channel_info(priv, band, channel)) {
632 IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
633 channel, band);
634 return -EINVAL;
635 }
636
637 if ((le16_to_cpu(priv->staging_rxon.channel) == channel) &&
638 (priv->band == band))
639 return 0;
640
641 priv->staging_rxon.channel = cpu_to_le16(channel);
642 if (band == IEEE80211_BAND_5GHZ)
643 priv->staging_rxon.flags &= ~RXON_FLG_BAND_24G_MSK;
644 else
645 priv->staging_rxon.flags |= RXON_FLG_BAND_24G_MSK;
646
647 priv->band = band;
648
649 IWL_DEBUG_INFO("Staging channel set to %d [%d]\n", channel, band);
650
651 return 0;
652 }
653 EXPORT_SYMBOL(iwl_set_rxon_channel);
654
655 static void iwlcore_init_hw(struct iwl_priv *priv)
656 {
657 struct ieee80211_hw *hw = priv->hw;
658 hw->rate_control_algorithm = "iwl-4965-rs";
659
660 /* Tell mac80211 and its clients (e.g. Wireless Extensions)
661 * the range of signal quality values that we'll provide.
662 * Negative values for level/noise indicate that we'll provide dBm.
663 * For WE, at least, non-0 values here *enable* display of values
664 * in app (iwconfig). */
665 hw->max_rssi = -20; /* signal level, negative indicates dBm */
666 hw->max_noise = -20; /* noise level, negative indicates dBm */
667 hw->max_signal = 100; /* link quality indication (%) */
668
669 /* Tell mac80211 our Tx characteristics */
670 hw->flags = IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE;
671
672 /* Default value; 4 EDCA QOS priorities */
673 hw->queues = 4;
674 #ifdef CONFIG_IWL4965_HT
675 /* Enhanced value; more queues, to support 11n aggregation */
676 hw->ampdu_queues = 12;
677 #endif /* CONFIG_IWL4965_HT */
678 }
679
680 static int iwlcore_init_drv(struct iwl_priv *priv)
681 {
682 int ret;
683 int i;
684
685 priv->retry_rate = 1;
686 priv->ibss_beacon = NULL;
687
688 spin_lock_init(&priv->lock);
689 spin_lock_init(&priv->power_data.lock);
690 spin_lock_init(&priv->sta_lock);
691 spin_lock_init(&priv->hcmd_lock);
692 spin_lock_init(&priv->lq_mngr.lock);
693
694 for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
695 INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
696
697 INIT_LIST_HEAD(&priv->free_frames);
698
699 mutex_init(&priv->mutex);
700
701 /* Clear the driver's (not device's) station table */
702 iwlcore_clear_stations_table(priv);
703
704 priv->data_retry_limit = -1;
705 priv->ieee_channels = NULL;
706 priv->ieee_rates = NULL;
707 priv->band = IEEE80211_BAND_2GHZ;
708
709 priv->iw_mode = IEEE80211_IF_TYPE_STA;
710
711 priv->use_ant_b_for_management_frame = 1; /* start with ant B */
712 priv->ps_mode = IWL_MIMO_PS_NONE;
713
714 /* Choose which receivers/antennas to use */
715 iwl_set_rxon_chain(priv);
716
717 iwl_reset_qos(priv);
718
719 priv->qos_data.qos_active = 0;
720 priv->qos_data.qos_cap.val = 0;
721
722 iwl_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
723
724 priv->rates_mask = IWL_RATES_MASK;
725 /* If power management is turned on, default to AC mode */
726 priv->power_mode = IWL_POWER_AC;
727 priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
728
729 ret = iwl_init_channel_map(priv);
730 if (ret) {
731 IWL_ERROR("initializing regulatory failed: %d\n", ret);
732 goto err;
733 }
734
735 ret = iwlcore_init_geos(priv);
736 if (ret) {
737 IWL_ERROR("initializing geos failed: %d\n", ret);
738 goto err_free_channel_map;
739 }
740
741 ret = ieee80211_register_hw(priv->hw);
742 if (ret) {
743 IWL_ERROR("Failed to register network device (error %d)\n",
744 ret);
745 goto err_free_geos;
746 }
747
748 priv->hw->conf.beacon_int = 100;
749 priv->mac80211_registered = 1;
750
751 return 0;
752
753 err_free_geos:
754 iwlcore_free_geos(priv);
755 err_free_channel_map:
756 iwl_free_channel_map(priv);
757 err:
758 return ret;
759 }
760
761 int iwl_setup(struct iwl_priv *priv)
762 {
763 int ret = 0;
764 iwlcore_init_hw(priv);
765 ret = iwlcore_init_drv(priv);
766 return ret;
767 }
768 EXPORT_SYMBOL(iwl_setup);
769
770 /* Low level driver call this function to update iwlcore with
771 * driver status.
772 */
773 int iwlcore_low_level_notify(struct iwl_priv *priv,
774 enum iwlcore_card_notify notify)
775 {
776 int ret;
777 switch (notify) {
778 case IWLCORE_INIT_EVT:
779 ret = iwl_rfkill_init(priv);
780 if (ret)
781 IWL_ERROR("Unable to initialize RFKILL system. "
782 "Ignoring error: %d\n", ret);
783 iwl_power_initialize(priv);
784 break;
785 case IWLCORE_START_EVT:
786 iwl_power_update_mode(priv, 1);
787 break;
788 case IWLCORE_STOP_EVT:
789 break;
790 case IWLCORE_REMOVE_EVT:
791 iwl_rfkill_unregister(priv);
792 break;
793 }
794
795 return 0;
796 }
797 EXPORT_SYMBOL(iwlcore_low_level_notify);
798
799 int iwl_send_statistics_request(struct iwl_priv *priv, u8 flags)
800 {
801 u32 stat_flags = 0;
802 struct iwl_host_cmd cmd = {
803 .id = REPLY_STATISTICS_CMD,
804 .meta.flags = flags,
805 .len = sizeof(stat_flags),
806 .data = (u8 *) &stat_flags,
807 };
808 return iwl_send_cmd(priv, &cmd);
809 }
810 EXPORT_SYMBOL(iwl_send_statistics_request);
811
812 /**
813 * iwl_verify_inst_sparse - verify runtime uCode image in card vs. host,
814 * using sample data 100 bytes apart. If these sample points are good,
815 * it's a pretty good bet that everything between them is good, too.
816 */
817 static int iwlcore_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
818 {
819 u32 val;
820 int ret = 0;
821 u32 errcnt = 0;
822 u32 i;
823
824 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
825
826 ret = iwl_grab_nic_access(priv);
827 if (ret)
828 return ret;
829
830 for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
831 /* read data comes through single port, auto-incr addr */
832 /* NOTE: Use the debugless read so we don't flood kernel log
833 * if IWL_DL_IO is set */
834 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR,
835 i + RTC_INST_LOWER_BOUND);
836 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
837 if (val != le32_to_cpu(*image)) {
838 ret = -EIO;
839 errcnt++;
840 if (errcnt >= 3)
841 break;
842 }
843 }
844
845 iwl_release_nic_access(priv);
846
847 return ret;
848 }
849
850 /**
851 * iwlcore_verify_inst_full - verify runtime uCode image in card vs. host,
852 * looking at all data.
853 */
854 static int iwl_verify_inst_full(struct iwl_priv *priv, __le32 *image,
855 u32 len)
856 {
857 u32 val;
858 u32 save_len = len;
859 int ret = 0;
860 u32 errcnt;
861
862 IWL_DEBUG_INFO("ucode inst image size is %u\n", len);
863
864 ret = iwl_grab_nic_access(priv);
865 if (ret)
866 return ret;
867
868 iwl_write_direct32(priv, HBUS_TARG_MEM_RADDR, RTC_INST_LOWER_BOUND);
869
870 errcnt = 0;
871 for (; len > 0; len -= sizeof(u32), image++) {
872 /* read data comes through single port, auto-incr addr */
873 /* NOTE: Use the debugless read so we don't flood kernel log
874 * if IWL_DL_IO is set */
875 val = _iwl_read_direct32(priv, HBUS_TARG_MEM_RDAT);
876 if (val != le32_to_cpu(*image)) {
877 IWL_ERROR("uCode INST section is invalid at "
878 "offset 0x%x, is 0x%x, s/b 0x%x\n",
879 save_len - len, val, le32_to_cpu(*image));
880 ret = -EIO;
881 errcnt++;
882 if (errcnt >= 20)
883 break;
884 }
885 }
886
887 iwl_release_nic_access(priv);
888
889 if (!errcnt)
890 IWL_DEBUG_INFO
891 ("ucode image in INSTRUCTION memory is good\n");
892
893 return ret;
894 }
895
896 /**
897 * iwl_verify_ucode - determine which instruction image is in SRAM,
898 * and verify its contents
899 */
900 int iwl_verify_ucode(struct iwl_priv *priv)
901 {
902 __le32 *image;
903 u32 len;
904 int ret;
905
906 /* Try bootstrap */
907 image = (__le32 *)priv->ucode_boot.v_addr;
908 len = priv->ucode_boot.len;
909 ret = iwlcore_verify_inst_sparse(priv, image, len);
910 if (!ret) {
911 IWL_DEBUG_INFO("Bootstrap uCode is good in inst SRAM\n");
912 return 0;
913 }
914
915 /* Try initialize */
916 image = (__le32 *)priv->ucode_init.v_addr;
917 len = priv->ucode_init.len;
918 ret = iwlcore_verify_inst_sparse(priv, image, len);
919 if (!ret) {
920 IWL_DEBUG_INFO("Initialize uCode is good in inst SRAM\n");
921 return 0;
922 }
923
924 /* Try runtime/protocol */
925 image = (__le32 *)priv->ucode_code.v_addr;
926 len = priv->ucode_code.len;
927 ret = iwlcore_verify_inst_sparse(priv, image, len);
928 if (!ret) {
929 IWL_DEBUG_INFO("Runtime uCode is good in inst SRAM\n");
930 return 0;
931 }
932
933 IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
934
935 /* Since nothing seems to match, show first several data entries in
936 * instruction SRAM, so maybe visual inspection will give a clue.
937 * Selection of bootstrap image (vs. other images) is arbitrary. */
938 image = (__le32 *)priv->ucode_boot.v_addr;
939 len = priv->ucode_boot.len;
940 ret = iwl_verify_inst_full(priv, image, len);
941
942 return ret;
943 }
944 EXPORT_SYMBOL(iwl_verify_ucode);
945
Linux kernel - Deliverables
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