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17f1de56 FF |
1 | /* |
2 | * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> | |
3 | * | |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | #include <linux/of.h> | |
17 | #include "mt76.h" | |
18 | ||
19 | #define CHAN2G(_idx, _freq) { \ | |
20 | .band = NL80211_BAND_2GHZ, \ | |
21 | .center_freq = (_freq), \ | |
22 | .hw_value = (_idx), \ | |
23 | .max_power = 30, \ | |
24 | } | |
25 | ||
26 | #define CHAN5G(_idx, _freq) { \ | |
27 | .band = NL80211_BAND_5GHZ, \ | |
28 | .center_freq = (_freq), \ | |
29 | .hw_value = (_idx), \ | |
30 | .max_power = 30, \ | |
31 | } | |
32 | ||
33 | static const struct ieee80211_channel mt76_channels_2ghz[] = { | |
34 | CHAN2G(1, 2412), | |
35 | CHAN2G(2, 2417), | |
36 | CHAN2G(3, 2422), | |
37 | CHAN2G(4, 2427), | |
38 | CHAN2G(5, 2432), | |
39 | CHAN2G(6, 2437), | |
40 | CHAN2G(7, 2442), | |
41 | CHAN2G(8, 2447), | |
42 | CHAN2G(9, 2452), | |
43 | CHAN2G(10, 2457), | |
44 | CHAN2G(11, 2462), | |
45 | CHAN2G(12, 2467), | |
46 | CHAN2G(13, 2472), | |
47 | CHAN2G(14, 2484), | |
48 | }; | |
49 | ||
50 | static const struct ieee80211_channel mt76_channels_5ghz[] = { | |
51 | CHAN5G(36, 5180), | |
52 | CHAN5G(40, 5200), | |
53 | CHAN5G(44, 5220), | |
54 | CHAN5G(48, 5240), | |
55 | ||
56 | CHAN5G(52, 5260), | |
57 | CHAN5G(56, 5280), | |
58 | CHAN5G(60, 5300), | |
59 | CHAN5G(64, 5320), | |
60 | ||
61 | CHAN5G(100, 5500), | |
62 | CHAN5G(104, 5520), | |
63 | CHAN5G(108, 5540), | |
64 | CHAN5G(112, 5560), | |
65 | CHAN5G(116, 5580), | |
66 | CHAN5G(120, 5600), | |
67 | CHAN5G(124, 5620), | |
68 | CHAN5G(128, 5640), | |
69 | CHAN5G(132, 5660), | |
70 | CHAN5G(136, 5680), | |
71 | CHAN5G(140, 5700), | |
72 | ||
73 | CHAN5G(149, 5745), | |
74 | CHAN5G(153, 5765), | |
75 | CHAN5G(157, 5785), | |
76 | CHAN5G(161, 5805), | |
77 | CHAN5G(165, 5825), | |
78 | }; | |
79 | ||
80 | static const struct ieee80211_tpt_blink mt76_tpt_blink[] = { | |
81 | { .throughput = 0 * 1024, .blink_time = 334 }, | |
82 | { .throughput = 1 * 1024, .blink_time = 260 }, | |
83 | { .throughput = 5 * 1024, .blink_time = 220 }, | |
84 | { .throughput = 10 * 1024, .blink_time = 190 }, | |
85 | { .throughput = 20 * 1024, .blink_time = 170 }, | |
86 | { .throughput = 50 * 1024, .blink_time = 150 }, | |
87 | { .throughput = 70 * 1024, .blink_time = 130 }, | |
88 | { .throughput = 100 * 1024, .blink_time = 110 }, | |
89 | { .throughput = 200 * 1024, .blink_time = 80 }, | |
90 | { .throughput = 300 * 1024, .blink_time = 50 }, | |
91 | }; | |
92 | ||
93 | static int mt76_led_init(struct mt76_dev *dev) | |
94 | { | |
95 | struct device_node *np = dev->dev->of_node; | |
96 | struct ieee80211_hw *hw = dev->hw; | |
97 | int led_pin; | |
98 | ||
99 | if (!dev->led_cdev.brightness_set && !dev->led_cdev.blink_set) | |
100 | return 0; | |
101 | ||
102 | snprintf(dev->led_name, sizeof(dev->led_name), | |
103 | "mt76-%s", wiphy_name(hw->wiphy)); | |
104 | ||
105 | dev->led_cdev.name = dev->led_name; | |
106 | dev->led_cdev.default_trigger = | |
107 | ieee80211_create_tpt_led_trigger(hw, | |
108 | IEEE80211_TPT_LEDTRIG_FL_RADIO, | |
109 | mt76_tpt_blink, | |
110 | ARRAY_SIZE(mt76_tpt_blink)); | |
111 | ||
112 | np = of_get_child_by_name(np, "led"); | |
113 | if (np) { | |
114 | if (!of_property_read_u32(np, "led-sources", &led_pin)) | |
115 | dev->led_pin = led_pin; | |
116 | dev->led_al = of_property_read_bool(np, "led-active-low"); | |
117 | } | |
118 | ||
119 | return devm_led_classdev_register(dev->dev, &dev->led_cdev); | |
120 | } | |
121 | ||
122 | static int | |
123 | mt76_init_sband(struct mt76_dev *dev, struct mt76_sband *msband, | |
124 | const struct ieee80211_channel *chan, int n_chan, | |
125 | struct ieee80211_rate *rates, int n_rates, bool vht) | |
126 | { | |
127 | struct ieee80211_supported_band *sband = &msband->sband; | |
128 | struct ieee80211_sta_ht_cap *ht_cap; | |
129 | struct ieee80211_sta_vht_cap *vht_cap; | |
130 | void *chanlist; | |
131 | u16 mcs_map; | |
132 | int size; | |
133 | ||
134 | size = n_chan * sizeof(*chan); | |
135 | chanlist = devm_kmemdup(dev->dev, chan, size, GFP_KERNEL); | |
136 | if (!chanlist) | |
137 | return -ENOMEM; | |
138 | ||
139 | msband->chan = devm_kzalloc(dev->dev, n_chan * sizeof(*msband->chan), | |
140 | GFP_KERNEL); | |
141 | if (!msband->chan) | |
142 | return -ENOMEM; | |
143 | ||
144 | sband->channels = chanlist; | |
145 | sband->n_channels = n_chan; | |
146 | sband->bitrates = rates; | |
147 | sband->n_bitrates = n_rates; | |
148 | dev->chandef.chan = &sband->channels[0]; | |
149 | ||
150 | ht_cap = &sband->ht_cap; | |
151 | ht_cap->ht_supported = true; | |
152 | ht_cap->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40 | | |
153 | IEEE80211_HT_CAP_GRN_FLD | | |
154 | IEEE80211_HT_CAP_SGI_20 | | |
155 | IEEE80211_HT_CAP_SGI_40 | | |
156 | IEEE80211_HT_CAP_TX_STBC | | |
157 | (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT); | |
158 | ||
159 | ht_cap->mcs.rx_mask[0] = 0xff; | |
160 | ht_cap->mcs.rx_mask[1] = 0xff; | |
161 | ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; | |
162 | ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K; | |
163 | ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4; | |
164 | ||
165 | if (!vht) | |
166 | return 0; | |
167 | ||
168 | vht_cap = &sband->vht_cap; | |
169 | vht_cap->vht_supported = true; | |
170 | ||
171 | mcs_map = (IEEE80211_VHT_MCS_SUPPORT_0_9 << (0 * 2)) | | |
172 | (IEEE80211_VHT_MCS_SUPPORT_0_9 << (1 * 2)) | | |
173 | (IEEE80211_VHT_MCS_NOT_SUPPORTED << (2 * 2)) | | |
174 | (IEEE80211_VHT_MCS_NOT_SUPPORTED << (3 * 2)) | | |
175 | (IEEE80211_VHT_MCS_NOT_SUPPORTED << (4 * 2)) | | |
176 | (IEEE80211_VHT_MCS_NOT_SUPPORTED << (5 * 2)) | | |
177 | (IEEE80211_VHT_MCS_NOT_SUPPORTED << (6 * 2)) | | |
178 | (IEEE80211_VHT_MCS_NOT_SUPPORTED << (7 * 2)); | |
179 | ||
180 | vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(mcs_map); | |
181 | vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(mcs_map); | |
182 | vht_cap->cap |= IEEE80211_VHT_CAP_RXLDPC | | |
183 | IEEE80211_VHT_CAP_TXSTBC | | |
184 | IEEE80211_VHT_CAP_RXSTBC_1 | | |
185 | IEEE80211_VHT_CAP_SHORT_GI_80; | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | static int | |
191 | mt76_init_sband_2g(struct mt76_dev *dev, struct ieee80211_rate *rates, | |
192 | int n_rates) | |
193 | { | |
194 | dev->hw->wiphy->bands[NL80211_BAND_2GHZ] = &dev->sband_2g.sband; | |
195 | ||
196 | return mt76_init_sband(dev, &dev->sband_2g, | |
197 | mt76_channels_2ghz, | |
198 | ARRAY_SIZE(mt76_channels_2ghz), | |
199 | rates, n_rates, false); | |
200 | } | |
201 | ||
202 | static int | |
203 | mt76_init_sband_5g(struct mt76_dev *dev, struct ieee80211_rate *rates, | |
204 | int n_rates, bool vht) | |
205 | { | |
206 | dev->hw->wiphy->bands[NL80211_BAND_5GHZ] = &dev->sband_5g.sband; | |
207 | ||
208 | return mt76_init_sband(dev, &dev->sband_5g, | |
209 | mt76_channels_5ghz, | |
210 | ARRAY_SIZE(mt76_channels_5ghz), | |
211 | rates, n_rates, vht); | |
212 | } | |
213 | ||
214 | static void | |
215 | mt76_check_sband(struct mt76_dev *dev, int band) | |
216 | { | |
217 | struct ieee80211_supported_band *sband = dev->hw->wiphy->bands[band]; | |
218 | bool found = false; | |
219 | int i; | |
220 | ||
221 | if (!sband) | |
222 | return; | |
223 | ||
224 | for (i = 0; i < sband->n_channels; i++) { | |
225 | if (sband->channels[i].flags & IEEE80211_CHAN_DISABLED) | |
226 | continue; | |
227 | ||
228 | found = true; | |
229 | break; | |
230 | } | |
231 | ||
232 | if (found) | |
233 | return; | |
234 | ||
235 | sband->n_channels = 0; | |
236 | dev->hw->wiphy->bands[band] = NULL; | |
237 | } | |
238 | ||
239 | int mt76_register_device(struct mt76_dev *dev, bool vht, | |
240 | struct ieee80211_rate *rates, int n_rates) | |
241 | { | |
242 | struct ieee80211_hw *hw = dev->hw; | |
243 | struct wiphy *wiphy = hw->wiphy; | |
244 | int ret; | |
245 | ||
246 | dev_set_drvdata(dev->dev, dev); | |
247 | ||
248 | spin_lock_init(&dev->lock); | |
249 | spin_lock_init(&dev->cc_lock); | |
250 | INIT_LIST_HEAD(&dev->txwi_cache); | |
251 | ||
252 | SET_IEEE80211_DEV(hw, dev->dev); | |
253 | SET_IEEE80211_PERM_ADDR(hw, dev->macaddr); | |
254 | ||
255 | wiphy->interface_modes = | |
256 | BIT(NL80211_IFTYPE_STATION) | | |
257 | BIT(NL80211_IFTYPE_AP) | | |
258 | #ifdef CONFIG_MAC80211_MESH | |
259 | BIT(NL80211_IFTYPE_MESH_POINT) | | |
260 | #endif | |
261 | BIT(NL80211_IFTYPE_ADHOC); | |
262 | ||
263 | wiphy->features |= NL80211_FEATURE_ACTIVE_MONITOR; | |
264 | ||
265 | hw->txq_data_size = sizeof(struct mt76_txq); | |
266 | hw->max_tx_fragments = 16; | |
267 | ||
268 | ieee80211_hw_set(hw, SIGNAL_DBM); | |
269 | ieee80211_hw_set(hw, PS_NULLFUNC_STACK); | |
270 | ieee80211_hw_set(hw, HOST_BROADCAST_PS_BUFFERING); | |
271 | ieee80211_hw_set(hw, AMPDU_AGGREGATION); | |
272 | ieee80211_hw_set(hw, SUPPORTS_RC_TABLE); | |
273 | ieee80211_hw_set(hw, SUPPORT_FAST_XMIT); | |
274 | ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS); | |
275 | ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU); | |
276 | ieee80211_hw_set(hw, TX_AMSDU); | |
277 | ieee80211_hw_set(hw, TX_FRAG_LIST); | |
278 | ieee80211_hw_set(hw, MFP_CAPABLE); | |
279 | ||
280 | wiphy->flags |= WIPHY_FLAG_IBSS_RSN; | |
281 | ||
282 | if (dev->cap.has_2ghz) { | |
283 | ret = mt76_init_sband_2g(dev, rates, n_rates); | |
284 | if (ret) | |
285 | return ret; | |
286 | } | |
287 | ||
288 | if (dev->cap.has_5ghz) { | |
289 | ret = mt76_init_sband_5g(dev, rates + 4, n_rates - 4, vht); | |
290 | if (ret) | |
291 | return ret; | |
292 | } | |
293 | ||
294 | wiphy_read_of_freq_limits(dev->hw->wiphy); | |
295 | mt76_check_sband(dev, NL80211_BAND_2GHZ); | |
296 | mt76_check_sband(dev, NL80211_BAND_5GHZ); | |
297 | ||
298 | ret = mt76_led_init(dev); | |
299 | if (ret) | |
300 | return ret; | |
301 | ||
302 | return ieee80211_register_hw(hw); | |
303 | } | |
304 | EXPORT_SYMBOL_GPL(mt76_register_device); | |
305 | ||
306 | void mt76_unregister_device(struct mt76_dev *dev) | |
307 | { | |
308 | struct ieee80211_hw *hw = dev->hw; | |
309 | ||
310 | ieee80211_unregister_hw(hw); | |
311 | mt76_tx_free(dev); | |
312 | } | |
313 | EXPORT_SYMBOL_GPL(mt76_unregister_device); | |
314 | ||
315 | void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb) | |
316 | { | |
317 | if (!test_bit(MT76_STATE_RUNNING, &dev->state)) { | |
318 | dev_kfree_skb(skb); | |
319 | return; | |
320 | } | |
321 | ||
322 | __skb_queue_tail(&dev->rx_skb[q], skb); | |
323 | } | |
324 | EXPORT_SYMBOL_GPL(mt76_rx); | |
325 | ||
326 | void mt76_set_channel(struct mt76_dev *dev) | |
327 | { | |
328 | struct ieee80211_hw *hw = dev->hw; | |
329 | struct cfg80211_chan_def *chandef = &hw->conf.chandef; | |
330 | struct mt76_channel_state *state; | |
331 | bool offchannel = hw->conf.flags & IEEE80211_CONF_OFFCHANNEL; | |
332 | ||
333 | if (dev->drv->update_survey) | |
334 | dev->drv->update_survey(dev); | |
335 | ||
336 | dev->chandef = *chandef; | |
337 | ||
338 | if (!offchannel) | |
339 | dev->main_chan = chandef->chan; | |
340 | ||
341 | if (chandef->chan != dev->main_chan) { | |
342 | state = mt76_channel_state(dev, chandef->chan); | |
343 | memset(state, 0, sizeof(*state)); | |
344 | } | |
345 | } | |
346 | EXPORT_SYMBOL_GPL(mt76_set_channel); | |
347 | ||
348 | int mt76_get_survey(struct ieee80211_hw *hw, int idx, | |
349 | struct survey_info *survey) | |
350 | { | |
351 | struct mt76_dev *dev = hw->priv; | |
352 | struct mt76_sband *sband; | |
353 | struct ieee80211_channel *chan; | |
354 | struct mt76_channel_state *state; | |
355 | int ret = 0; | |
356 | ||
357 | if (idx == 0 && dev->drv->update_survey) | |
358 | dev->drv->update_survey(dev); | |
359 | ||
360 | sband = &dev->sband_2g; | |
361 | if (idx >= sband->sband.n_channels) { | |
362 | idx -= sband->sband.n_channels; | |
363 | sband = &dev->sband_5g; | |
364 | } | |
365 | ||
366 | if (idx >= sband->sband.n_channels) | |
367 | return -ENOENT; | |
368 | ||
369 | chan = &sband->sband.channels[idx]; | |
370 | state = mt76_channel_state(dev, chan); | |
371 | ||
372 | memset(survey, 0, sizeof(*survey)); | |
373 | survey->channel = chan; | |
374 | survey->filled = SURVEY_INFO_TIME | SURVEY_INFO_TIME_BUSY; | |
375 | if (chan == dev->main_chan) | |
376 | survey->filled |= SURVEY_INFO_IN_USE; | |
377 | ||
378 | spin_lock_bh(&dev->cc_lock); | |
379 | survey->time = div_u64(state->cc_active, 1000); | |
380 | survey->time_busy = div_u64(state->cc_busy, 1000); | |
381 | spin_unlock_bh(&dev->cc_lock); | |
382 | ||
383 | return ret; | |
384 | } | |
385 | EXPORT_SYMBOL_GPL(mt76_get_survey); | |
386 | ||
aee5b8cf | 387 | struct ieee80211_sta *mt76_rx_convert(struct sk_buff *skb) |
4e34249e FF |
388 | { |
389 | struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(skb); | |
390 | struct mt76_rx_status mstat; | |
391 | ||
392 | mstat = *((struct mt76_rx_status *) skb->cb); | |
393 | memset(status, 0, sizeof(*status)); | |
394 | ||
395 | status->flag = mstat.flag; | |
396 | status->freq = mstat.freq; | |
397 | status->enc_flags = mstat.enc_flags; | |
398 | status->encoding = mstat.encoding; | |
399 | status->bw = mstat.bw; | |
400 | status->rate_idx = mstat.rate_idx; | |
401 | status->nss = mstat.nss; | |
402 | status->band = mstat.band; | |
403 | status->signal = mstat.signal; | |
404 | status->chains = mstat.chains; | |
405 | ||
406 | BUILD_BUG_ON(sizeof(mstat) > sizeof(skb->cb)); | |
407 | BUILD_BUG_ON(sizeof(status->chain_signal) != sizeof(mstat.chain_signal)); | |
408 | memcpy(status->chain_signal, mstat.chain_signal, sizeof(mstat.chain_signal)); | |
9c68a57b FF |
409 | |
410 | return wcid_to_sta(mstat.wcid); | |
4e34249e FF |
411 | } |
412 | ||
17f1de56 FF |
413 | void mt76_rx_complete(struct mt76_dev *dev, enum mt76_rxq_id q) |
414 | { | |
9c68a57b | 415 | struct ieee80211_sta *sta; |
aee5b8cf | 416 | struct sk_buff_head frames; |
17f1de56 FF |
417 | struct sk_buff *skb; |
418 | ||
aee5b8cf FF |
419 | __skb_queue_head_init(&frames); |
420 | ||
421 | while ((skb = __skb_dequeue(&dev->rx_skb[q])) != NULL) | |
422 | mt76_rx_aggr_reorder(skb, &frames); | |
423 | ||
424 | while ((skb = __skb_dequeue(&frames)) != NULL) { | |
9c68a57b FF |
425 | sta = mt76_rx_convert(skb); |
426 | ieee80211_rx_napi(dev->hw, sta, skb, &dev->napi[q]); | |
4e34249e | 427 | } |
17f1de56 | 428 | } |