Commit | Line | Data |
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ef6b19e4 SM |
1 | /* |
2 | * Copyright (c) 2013 Qualcomm Atheros, Inc. | |
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 "ath9k.h" | |
18 | ||
19 | static void ath9k_tx99_stop(struct ath_softc *sc) | |
20 | { | |
21 | struct ath_hw *ah = sc->sc_ah; | |
22 | struct ath_common *common = ath9k_hw_common(ah); | |
23 | ||
24 | ath_drain_all_txq(sc); | |
25 | ath_startrecv(sc); | |
26 | ||
27 | ath9k_hw_set_interrupts(ah); | |
28 | ath9k_hw_enable_interrupts(ah); | |
29 | ||
30 | ieee80211_wake_queues(sc->hw); | |
31 | ||
32 | kfree_skb(sc->tx99_skb); | |
33 | sc->tx99_skb = NULL; | |
34 | sc->tx99_state = false; | |
35 | ||
36 | ath9k_hw_tx99_stop(sc->sc_ah); | |
37 | ath_dbg(common, XMIT, "TX99 stopped\n"); | |
38 | } | |
39 | ||
40 | static struct sk_buff *ath9k_build_tx99_skb(struct ath_softc *sc) | |
41 | { | |
42 | static u8 PN9Data[] = {0xff, 0x87, 0xb8, 0x59, 0xb7, 0xa1, 0xcc, 0x24, | |
43 | 0x57, 0x5e, 0x4b, 0x9c, 0x0e, 0xe9, 0xea, 0x50, | |
44 | 0x2a, 0xbe, 0xb4, 0x1b, 0xb6, 0xb0, 0x5d, 0xf1, | |
45 | 0xe6, 0x9a, 0xe3, 0x45, 0xfd, 0x2c, 0x53, 0x18, | |
46 | 0x0c, 0xca, 0xc9, 0xfb, 0x49, 0x37, 0xe5, 0xa8, | |
47 | 0x51, 0x3b, 0x2f, 0x61, 0xaa, 0x72, 0x18, 0x84, | |
48 | 0x02, 0x23, 0x23, 0xab, 0x63, 0x89, 0x51, 0xb3, | |
49 | 0xe7, 0x8b, 0x72, 0x90, 0x4c, 0xe8, 0xfb, 0xc0}; | |
50 | u32 len = 1200; | |
55957fb7 | 51 | struct ieee80211_tx_rate *rate; |
ef6b19e4 | 52 | struct ieee80211_hw *hw = sc->hw; |
55957fb7 | 53 | struct ath_hw *ah = sc->sc_ah; |
ef6b19e4 SM |
54 | struct ieee80211_hdr *hdr; |
55 | struct ieee80211_tx_info *tx_info; | |
56 | struct sk_buff *skb; | |
ca14405e SM |
57 | struct ath_vif *avp; |
58 | ||
59 | if (!sc->tx99_vif) | |
60 | return NULL; | |
61 | ||
62 | avp = (struct ath_vif *)sc->tx99_vif->drv_priv; | |
ef6b19e4 SM |
63 | |
64 | skb = alloc_skb(len, GFP_KERNEL); | |
65 | if (!skb) | |
66 | return NULL; | |
67 | ||
68 | skb_put(skb, len); | |
69 | ||
70 | memset(skb->data, 0, len); | |
71 | ||
72 | hdr = (struct ieee80211_hdr *)skb->data; | |
73 | hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA); | |
74 | hdr->duration_id = 0; | |
75 | ||
76 | memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN); | |
77 | memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN); | |
78 | memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN); | |
79 | ||
ca14405e | 80 | hdr->seq_ctrl |= cpu_to_le16(avp->seq_no); |
ef6b19e4 SM |
81 | |
82 | tx_info = IEEE80211_SKB_CB(skb); | |
83 | memset(tx_info, 0, sizeof(*tx_info)); | |
55957fb7 | 84 | rate = &tx_info->control.rates[0]; |
39305635 | 85 | tx_info->band = sc->cur_chan->chandef.chan->band; |
ef6b19e4 SM |
86 | tx_info->flags = IEEE80211_TX_CTL_NO_ACK; |
87 | tx_info->control.vif = sc->tx99_vif; | |
55957fb7 LB |
88 | rate->count = 1; |
89 | if (ah->curchan && IS_CHAN_HT(ah->curchan)) { | |
90 | rate->flags |= IEEE80211_TX_RC_MCS; | |
91 | if (IS_CHAN_HT40(ah->curchan)) | |
92 | rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; | |
93 | } | |
ef6b19e4 SM |
94 | |
95 | memcpy(skb->data + sizeof(*hdr), PN9Data, sizeof(PN9Data)); | |
96 | ||
97 | return skb; | |
98 | } | |
99 | ||
100 | static void ath9k_tx99_deinit(struct ath_softc *sc) | |
101 | { | |
5555c955 | 102 | ath_reset(sc, NULL); |
ef6b19e4 SM |
103 | |
104 | ath9k_ps_wakeup(sc); | |
105 | ath9k_tx99_stop(sc); | |
106 | ath9k_ps_restore(sc); | |
107 | } | |
108 | ||
109 | static int ath9k_tx99_init(struct ath_softc *sc) | |
110 | { | |
111 | struct ieee80211_hw *hw = sc->hw; | |
112 | struct ath_hw *ah = sc->sc_ah; | |
113 | struct ath_common *common = ath9k_hw_common(ah); | |
114 | struct ath_tx_control txctl; | |
115 | int r; | |
116 | ||
eefa01dd | 117 | if (test_bit(ATH_OP_INVALID, &common->op_flags)) { |
ef6b19e4 SM |
118 | ath_err(common, |
119 | "driver is in invalid state unable to use TX99"); | |
120 | return -EINVAL; | |
121 | } | |
122 | ||
123 | sc->tx99_skb = ath9k_build_tx99_skb(sc); | |
124 | if (!sc->tx99_skb) | |
125 | return -ENOMEM; | |
126 | ||
127 | memset(&txctl, 0, sizeof(txctl)); | |
128 | txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO]; | |
129 | ||
5555c955 | 130 | ath_reset(sc, NULL); |
ef6b19e4 SM |
131 | |
132 | ath9k_ps_wakeup(sc); | |
133 | ||
134 | ath9k_hw_disable_interrupts(ah); | |
135 | atomic_set(&ah->intr_ref_cnt, -1); | |
136 | ath_drain_all_txq(sc); | |
137 | ath_stoprecv(sc); | |
138 | ||
139 | sc->tx99_state = true; | |
140 | ||
141 | ieee80211_stop_queues(hw); | |
142 | ||
143 | if (sc->tx99_power == MAX_RATE_POWER + 1) | |
144 | sc->tx99_power = MAX_RATE_POWER; | |
145 | ||
146 | ath9k_hw_tx99_set_txpower(ah, sc->tx99_power); | |
147 | r = ath9k_tx99_send(sc, sc->tx99_skb, &txctl); | |
148 | if (r) { | |
149 | ath_dbg(common, XMIT, "Failed to xmit TX99 skb\n"); | |
150 | return r; | |
151 | } | |
152 | ||
153 | ath_dbg(common, XMIT, "TX99 xmit started using %d ( %ddBm)\n", | |
154 | sc->tx99_power, | |
155 | sc->tx99_power / 2); | |
156 | ||
157 | /* We leave the harware awake as it will be chugging on */ | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | static ssize_t read_file_tx99(struct file *file, char __user *user_buf, | |
163 | size_t count, loff_t *ppos) | |
164 | { | |
165 | struct ath_softc *sc = file->private_data; | |
166 | char buf[3]; | |
167 | unsigned int len; | |
168 | ||
169 | len = sprintf(buf, "%d\n", sc->tx99_state); | |
170 | return simple_read_from_buffer(user_buf, count, ppos, buf, len); | |
171 | } | |
172 | ||
173 | static ssize_t write_file_tx99(struct file *file, const char __user *user_buf, | |
174 | size_t count, loff_t *ppos) | |
175 | { | |
176 | struct ath_softc *sc = file->private_data; | |
177 | struct ath_common *common = ath9k_hw_common(sc->sc_ah); | |
178 | char buf[32]; | |
179 | bool start; | |
180 | ssize_t len; | |
181 | int r; | |
182 | ||
ca529c93 | 183 | if (sc->cur_chan->nvifs > 1) |
ef6b19e4 SM |
184 | return -EOPNOTSUPP; |
185 | ||
186 | len = min(count, sizeof(buf) - 1); | |
187 | if (copy_from_user(buf, user_buf, len)) | |
188 | return -EFAULT; | |
189 | ||
190 | if (strtobool(buf, &start)) | |
191 | return -EINVAL; | |
192 | ||
193 | if (start == sc->tx99_state) { | |
194 | if (!start) | |
195 | return count; | |
196 | ath_dbg(common, XMIT, "Resetting TX99\n"); | |
197 | ath9k_tx99_deinit(sc); | |
198 | } | |
199 | ||
200 | if (!start) { | |
201 | ath9k_tx99_deinit(sc); | |
202 | return count; | |
203 | } | |
204 | ||
205 | r = ath9k_tx99_init(sc); | |
206 | if (r) | |
207 | return r; | |
208 | ||
209 | return count; | |
210 | } | |
211 | ||
212 | static const struct file_operations fops_tx99 = { | |
213 | .read = read_file_tx99, | |
214 | .write = write_file_tx99, | |
215 | .open = simple_open, | |
216 | .owner = THIS_MODULE, | |
217 | .llseek = default_llseek, | |
218 | }; | |
219 | ||
220 | static ssize_t read_file_tx99_power(struct file *file, | |
221 | char __user *user_buf, | |
222 | size_t count, loff_t *ppos) | |
223 | { | |
224 | struct ath_softc *sc = file->private_data; | |
225 | char buf[32]; | |
226 | unsigned int len; | |
227 | ||
228 | len = sprintf(buf, "%d (%d dBm)\n", | |
229 | sc->tx99_power, | |
230 | sc->tx99_power / 2); | |
231 | ||
232 | return simple_read_from_buffer(user_buf, count, ppos, buf, len); | |
233 | } | |
234 | ||
235 | static ssize_t write_file_tx99_power(struct file *file, | |
236 | const char __user *user_buf, | |
237 | size_t count, loff_t *ppos) | |
238 | { | |
239 | struct ath_softc *sc = file->private_data; | |
240 | int r; | |
241 | u8 tx_power; | |
242 | ||
243 | r = kstrtou8_from_user(user_buf, count, 0, &tx_power); | |
244 | if (r) | |
245 | return r; | |
246 | ||
247 | if (tx_power > MAX_RATE_POWER) | |
248 | return -EINVAL; | |
249 | ||
250 | sc->tx99_power = tx_power; | |
251 | ||
252 | ath9k_ps_wakeup(sc); | |
253 | ath9k_hw_tx99_set_txpower(sc->sc_ah, sc->tx99_power); | |
254 | ath9k_ps_restore(sc); | |
255 | ||
256 | return count; | |
257 | } | |
258 | ||
259 | static const struct file_operations fops_tx99_power = { | |
260 | .read = read_file_tx99_power, | |
261 | .write = write_file_tx99_power, | |
262 | .open = simple_open, | |
263 | .owner = THIS_MODULE, | |
264 | .llseek = default_llseek, | |
265 | }; | |
266 | ||
267 | void ath9k_tx99_init_debug(struct ath_softc *sc) | |
268 | { | |
269 | if (!AR_SREV_9300_20_OR_LATER(sc->sc_ah)) | |
270 | return; | |
271 | ||
272 | debugfs_create_file("tx99", S_IRUSR | S_IWUSR, | |
273 | sc->debug.debugfs_phy, sc, | |
274 | &fops_tx99); | |
275 | debugfs_create_file("tx99_power", S_IRUSR | S_IWUSR, | |
276 | sc->debug.debugfs_phy, sc, | |
277 | &fops_tx99_power); | |
278 | } |