1 /*
2  * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
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 
17 #include "mt76x2u.h"
18 
19 static int mt76x2u_start(struct ieee80211_hw *hw)
20 {
21 	struct mt76x02_dev *dev = hw->priv;
22 	int ret;
23 
24 	mutex_lock(&dev->mt76.mutex);
25 
26 	ret = mt76x2u_mac_start(dev);
27 	if (ret)
28 		goto out;
29 
30 	ieee80211_queue_delayed_work(mt76_hw(dev), &dev->mac_work,
31 				     MT_CALIBRATE_INTERVAL);
32 	set_bit(MT76_STATE_RUNNING, &dev->mt76.state);
33 
34 out:
35 	mutex_unlock(&dev->mt76.mutex);
36 	return ret;
37 }
38 
39 static void mt76x2u_stop(struct ieee80211_hw *hw)
40 {
41 	struct mt76x02_dev *dev = hw->priv;
42 
43 	mutex_lock(&dev->mt76.mutex);
44 	clear_bit(MT76_STATE_RUNNING, &dev->mt76.state);
45 	mt76x2u_stop_hw(dev);
46 	mutex_unlock(&dev->mt76.mutex);
47 }
48 
49 static int mt76x2u_add_interface(struct ieee80211_hw *hw,
50 				 struct ieee80211_vif *vif)
51 {
52 	struct mt76x02_dev *dev = hw->priv;
53 	unsigned int idx = 8;
54 
55 	if (!ether_addr_equal(dev->mt76.macaddr, vif->addr))
56 		mt76x02_mac_setaddr(dev, vif->addr);
57 
58 	mt76x02_vif_init(dev, vif, idx);
59 	return 0;
60 }
61 
62 static int
63 mt76x2u_set_channel(struct mt76x02_dev *dev,
64 		    struct cfg80211_chan_def *chandef)
65 {
66 	int err;
67 
68 	cancel_delayed_work_sync(&dev->cal_work);
69 	set_bit(MT76_RESET, &dev->mt76.state);
70 
71 	mt76_set_channel(&dev->mt76);
72 
73 	mt76_clear(dev, MT_TXOP_CTRL_CFG, BIT(20));
74 	mt76_clear(dev, MT_TXOP_HLDR_ET, BIT(1));
75 	mt76x2_mac_stop(dev, false);
76 
77 	err = mt76x2u_phy_set_channel(dev, chandef);
78 
79 	mt76x2u_mac_resume(dev);
80 
81 	clear_bit(MT76_RESET, &dev->mt76.state);
82 	mt76_txq_schedule_all(&dev->mt76);
83 
84 	return err;
85 }
86 
87 static int
88 mt76x2u_config(struct ieee80211_hw *hw, u32 changed)
89 {
90 	struct mt76x02_dev *dev = hw->priv;
91 	int err = 0;
92 
93 	mutex_lock(&dev->mt76.mutex);
94 
95 	if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
96 		if (!(hw->conf.flags & IEEE80211_CONF_MONITOR))
97 			dev->mt76.rxfilter |= MT_RX_FILTR_CFG_PROMISC;
98 		else
99 			dev->mt76.rxfilter &= ~MT_RX_FILTR_CFG_PROMISC;
100 		mt76_wr(dev, MT_RX_FILTR_CFG, dev->mt76.rxfilter);
101 	}
102 
103 	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
104 		ieee80211_stop_queues(hw);
105 		err = mt76x2u_set_channel(dev, &hw->conf.chandef);
106 		ieee80211_wake_queues(hw);
107 	}
108 
109 	if (changed & IEEE80211_CONF_CHANGE_POWER) {
110 		dev->mt76.txpower_conf = hw->conf.power_level * 2;
111 
112 		/* convert to per-chain power for 2x2 devices */
113 		dev->mt76.txpower_conf -= 6;
114 
115 		if (test_bit(MT76_STATE_RUNNING, &dev->mt76.state))
116 			mt76x2_phy_set_txpower(dev);
117 	}
118 
119 	mutex_unlock(&dev->mt76.mutex);
120 
121 	return err;
122 }
123 
124 const struct ieee80211_ops mt76x2u_ops = {
125 	.tx = mt76x02_tx,
126 	.start = mt76x2u_start,
127 	.stop = mt76x2u_stop,
128 	.add_interface = mt76x2u_add_interface,
129 	.remove_interface = mt76x02_remove_interface,
130 	.sta_state = mt76_sta_state,
131 	.set_key = mt76x02_set_key,
132 	.ampdu_action = mt76x02_ampdu_action,
133 	.config = mt76x2u_config,
134 	.wake_tx_queue = mt76_wake_tx_queue,
135 	.bss_info_changed = mt76x02_bss_info_changed,
136 	.configure_filter = mt76x02_configure_filter,
137 	.conf_tx = mt76x02_conf_tx,
138 	.sw_scan_start = mt76x02_sw_scan,
139 	.sw_scan_complete = mt76x02_sw_scan_complete,
140 	.sta_rate_tbl_update = mt76x02_sta_rate_tbl_update,
141 	.get_txpower = mt76x02_get_txpower,
142 };
143