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6cb19353 CL |
1 | /* |
2 | * Atheros AR9170 driver | |
3 | * | |
4 | * MAC programming | |
5 | * | |
6 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; see the file COPYING. If not, see | |
20 | * http://www.gnu.org/licenses/. | |
21 | * | |
22 | * This file incorporates work covered by the following copyright and | |
23 | * permission notice: | |
24 | * Copyright (c) 2007-2008 Atheros Communications, Inc. | |
25 | * | |
26 | * Permission to use, copy, modify, and/or distribute this software for any | |
27 | * purpose with or without fee is hereby granted, provided that the above | |
28 | * copyright notice and this permission notice appear in all copies. | |
29 | * | |
30 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
31 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
32 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
33 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
34 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
35 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
36 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
37 | */ | |
38 | #include "ar9170.h" | |
39 | #include "cmd.h" | |
40 | ||
41 | int ar9170_set_qos(struct ar9170 *ar) | |
42 | { | |
43 | ar9170_regwrite_begin(ar); | |
44 | ||
45 | ar9170_regwrite(AR9170_MAC_REG_AC0_CW, ar->edcf[0].cw_min | | |
46 | (ar->edcf[0].cw_max << 16)); | |
47 | ar9170_regwrite(AR9170_MAC_REG_AC1_CW, ar->edcf[1].cw_min | | |
48 | (ar->edcf[1].cw_max << 16)); | |
49 | ar9170_regwrite(AR9170_MAC_REG_AC2_CW, ar->edcf[2].cw_min | | |
50 | (ar->edcf[2].cw_max << 16)); | |
51 | ar9170_regwrite(AR9170_MAC_REG_AC3_CW, ar->edcf[3].cw_min | | |
52 | (ar->edcf[3].cw_max << 16)); | |
53 | ar9170_regwrite(AR9170_MAC_REG_AC4_CW, ar->edcf[4].cw_min | | |
54 | (ar->edcf[4].cw_max << 16)); | |
55 | ||
56 | ar9170_regwrite(AR9170_MAC_REG_AC1_AC0_AIFS, | |
57 | ((ar->edcf[0].aifs * 9 + 10)) | | |
58 | ((ar->edcf[1].aifs * 9 + 10) << 12) | | |
59 | ((ar->edcf[2].aifs * 9 + 10) << 24)); | |
60 | ar9170_regwrite(AR9170_MAC_REG_AC3_AC2_AIFS, | |
61 | ((ar->edcf[2].aifs * 9 + 10) >> 8) | | |
62 | ((ar->edcf[3].aifs * 9 + 10) << 4) | | |
63 | ((ar->edcf[4].aifs * 9 + 10) << 16)); | |
64 | ||
65 | ar9170_regwrite(AR9170_MAC_REG_AC1_AC0_TXOP, | |
66 | ar->edcf[0].txop | ar->edcf[1].txop << 16); | |
67 | ar9170_regwrite(AR9170_MAC_REG_AC3_AC2_TXOP, | |
68 | ar->edcf[1].txop | ar->edcf[3].txop << 16); | |
69 | ||
70 | ar9170_regwrite_finish(); | |
71 | ||
72 | return ar9170_regwrite_result(); | |
73 | } | |
74 | ||
75 | int ar9170_init_mac(struct ar9170 *ar) | |
76 | { | |
77 | ar9170_regwrite_begin(ar); | |
78 | ||
79 | ar9170_regwrite(AR9170_MAC_REG_ACK_EXTENSION, 0x40); | |
80 | ||
81 | ar9170_regwrite(AR9170_MAC_REG_RETRY_MAX, 0); | |
82 | ||
83 | /* enable MMIC */ | |
84 | ar9170_regwrite(AR9170_MAC_REG_SNIFFER, | |
85 | AR9170_MAC_REG_SNIFFER_DEFAULTS); | |
86 | ||
87 | ar9170_regwrite(AR9170_MAC_REG_RX_THRESHOLD, 0xc1f80); | |
88 | ||
89 | ar9170_regwrite(AR9170_MAC_REG_RX_PE_DELAY, 0x70); | |
90 | ar9170_regwrite(AR9170_MAC_REG_EIFS_AND_SIFS, 0xa144000); | |
91 | ar9170_regwrite(AR9170_MAC_REG_SLOT_TIME, 9 << 10); | |
92 | ||
93 | /* CF-END mode */ | |
94 | ar9170_regwrite(0x1c3b2c, 0x19000000); | |
95 | ||
96 | /* NAV protects ACK only (in TXOP) */ | |
97 | ar9170_regwrite(0x1c3b38, 0x201); | |
98 | ||
99 | /* Set Beacon PHY CTRL's TPC to 0x7, TA1=1 */ | |
100 | /* OTUS set AM to 0x1 */ | |
101 | ar9170_regwrite(AR9170_MAC_REG_BCN_HT1, 0x8000170); | |
102 | ||
103 | ar9170_regwrite(AR9170_MAC_REG_BACKOFF_PROTECT, 0x105); | |
104 | ||
105 | /* AGG test code*/ | |
106 | /* Aggregation MAX number and timeout */ | |
107 | ar9170_regwrite(0x1c3b9c, 0x10000a); | |
108 | ||
109 | ar9170_regwrite(AR9170_MAC_REG_FRAMETYPE_FILTER, | |
110 | AR9170_MAC_REG_FTF_DEFAULTS); | |
111 | ||
112 | /* Enable deaggregator, response in sniffer mode */ | |
113 | ar9170_regwrite(0x1c3c40, 0x1 | 1<<30); | |
114 | ||
115 | /* rate sets */ | |
116 | ar9170_regwrite(AR9170_MAC_REG_BASIC_RATE, 0x150f); | |
117 | ar9170_regwrite(AR9170_MAC_REG_MANDATORY_RATE, 0x150f); | |
118 | ar9170_regwrite(AR9170_MAC_REG_RTS_CTS_RATE, 0x10b01bb); | |
119 | ||
120 | /* MIMO response control */ | |
121 | ar9170_regwrite(0x1c3694, 0x4003C1E);/* bit 26~28 otus-AM */ | |
122 | ||
123 | /* switch MAC to OTUS interface */ | |
124 | ar9170_regwrite(0x1c3600, 0x3); | |
125 | ||
126 | ar9170_regwrite(AR9170_MAC_REG_AMPDU_RX_THRESH, 0xffff); | |
127 | ||
128 | /* set PHY register read timeout (??) */ | |
129 | ar9170_regwrite(AR9170_MAC_REG_MISC_680, 0xf00008); | |
130 | ||
131 | /* Disable Rx TimeOut, workaround for BB. */ | |
132 | ar9170_regwrite(AR9170_MAC_REG_RX_TIMEOUT, 0x0); | |
133 | ||
134 | /* Set CPU clock frequency to 88/80MHz */ | |
135 | ar9170_regwrite(AR9170_PWR_REG_CLOCK_SEL, | |
136 | AR9170_PWR_CLK_AHB_80_88MHZ | | |
137 | AR9170_PWR_CLK_DAC_160_INV_DLY); | |
138 | ||
139 | /* Set WLAN DMA interrupt mode: generate int per packet */ | |
140 | ar9170_regwrite(AR9170_MAC_REG_TXRX_MPI, 0x110011); | |
141 | ||
142 | ar9170_regwrite(AR9170_MAC_REG_FCS_SELECT, | |
143 | AR9170_MAC_FCS_FIFO_PROT); | |
144 | ||
145 | /* Disables the CF_END frame, undocumented register */ | |
146 | ar9170_regwrite(AR9170_MAC_REG_TXOP_NOT_ENOUGH_IND, | |
147 | 0x141E0F48); | |
148 | ||
149 | ar9170_regwrite_finish(); | |
150 | ||
151 | return ar9170_regwrite_result(); | |
152 | } | |
153 | ||
154 | static int ar9170_set_mac_reg(struct ar9170 *ar, const u32 reg, const u8 *mac) | |
155 | { | |
156 | static const u8 zero[ETH_ALEN] = { 0 }; | |
157 | ||
158 | if (!mac) | |
159 | mac = zero; | |
160 | ||
161 | ar9170_regwrite_begin(ar); | |
162 | ||
163 | ar9170_regwrite(reg, | |
164 | (mac[3] << 24) | (mac[2] << 16) | | |
165 | (mac[1] << 8) | mac[0]); | |
166 | ||
167 | ar9170_regwrite(reg + 4, (mac[5] << 8) | mac[4]); | |
168 | ||
169 | ar9170_regwrite_finish(); | |
170 | ||
171 | return ar9170_regwrite_result(); | |
172 | } | |
173 | ||
174 | int ar9170_update_multicast(struct ar9170 *ar) | |
175 | { | |
176 | int err; | |
177 | ||
178 | ar9170_regwrite_begin(ar); | |
179 | ar9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_H, | |
180 | ar->want_mc_hash >> 32); | |
181 | ar9170_regwrite(AR9170_MAC_REG_GROUP_HASH_TBL_L, | |
182 | ar->want_mc_hash); | |
183 | ||
184 | ar9170_regwrite_finish(); | |
185 | err = ar9170_regwrite_result(); | |
186 | ||
187 | if (err) | |
188 | return err; | |
189 | ||
190 | ar->cur_mc_hash = ar->want_mc_hash; | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | int ar9170_update_frame_filter(struct ar9170 *ar) | |
196 | { | |
197 | int err; | |
198 | ||
199 | err = ar9170_write_reg(ar, AR9170_MAC_REG_FRAMETYPE_FILTER, | |
200 | ar->want_filter); | |
201 | ||
202 | if (err) | |
203 | return err; | |
204 | ||
205 | ar->cur_filter = ar->want_filter; | |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | static int ar9170_set_promiscouous(struct ar9170 *ar) | |
211 | { | |
212 | u32 encr_mode, sniffer; | |
213 | int err; | |
214 | ||
215 | err = ar9170_read_reg(ar, AR9170_MAC_REG_SNIFFER, &sniffer); | |
216 | if (err) | |
217 | return err; | |
218 | ||
219 | err = ar9170_read_reg(ar, AR9170_MAC_REG_ENCRYPTION, &encr_mode); | |
220 | if (err) | |
221 | return err; | |
222 | ||
223 | if (ar->sniffer_enabled) { | |
224 | sniffer |= AR9170_MAC_REG_SNIFFER_ENABLE_PROMISC; | |
225 | ||
226 | /* | |
227 | * Rx decryption works in place. | |
228 | * | |
229 | * If we don't disable it, the hardware will render all | |
230 | * encrypted frames which are encrypted with an unknown | |
231 | * key useless. | |
232 | */ | |
233 | ||
234 | encr_mode |= AR9170_MAC_REG_ENCRYPTION_RX_SOFTWARE; | |
235 | ar->sniffer_enabled = true; | |
236 | } else { | |
237 | sniffer &= ~AR9170_MAC_REG_SNIFFER_ENABLE_PROMISC; | |
238 | ||
239 | if (ar->rx_software_decryption) | |
240 | encr_mode |= AR9170_MAC_REG_ENCRYPTION_RX_SOFTWARE; | |
241 | else | |
242 | encr_mode &= ~AR9170_MAC_REG_ENCRYPTION_RX_SOFTWARE; | |
243 | } | |
244 | ||
245 | ar9170_regwrite_begin(ar); | |
246 | ar9170_regwrite(AR9170_MAC_REG_ENCRYPTION, encr_mode); | |
247 | ar9170_regwrite(AR9170_MAC_REG_SNIFFER, sniffer); | |
248 | ar9170_regwrite_finish(); | |
249 | ||
250 | return ar9170_regwrite_result(); | |
251 | } | |
252 | ||
253 | int ar9170_set_operating_mode(struct ar9170 *ar) | |
254 | { | |
255 | u32 pm_mode = AR9170_MAC_REG_POWERMGT_DEFAULTS; | |
256 | u8 *mac_addr, *bssid; | |
257 | int err; | |
258 | ||
259 | if (ar->vif) { | |
260 | mac_addr = ar->mac_addr; | |
261 | bssid = ar->bssid; | |
262 | ||
263 | switch (ar->vif->type) { | |
264 | case NL80211_IFTYPE_MESH_POINT: | |
265 | case NL80211_IFTYPE_ADHOC: | |
266 | pm_mode |= AR9170_MAC_REG_POWERMGT_IBSS; | |
267 | break; | |
268 | /* case NL80211_IFTYPE_AP: | |
269 | pm_mode |= AR9170_MAC_REG_POWERMGT_AP; | |
270 | break;*/ | |
271 | case NL80211_IFTYPE_WDS: | |
272 | pm_mode |= AR9170_MAC_REG_POWERMGT_AP_WDS; | |
273 | break; | |
274 | case NL80211_IFTYPE_MONITOR: | |
275 | ar->sniffer_enabled = true; | |
276 | ar->rx_software_decryption = true; | |
277 | break; | |
278 | default: | |
279 | pm_mode |= AR9170_MAC_REG_POWERMGT_STA; | |
280 | break; | |
281 | } | |
282 | } else { | |
283 | mac_addr = NULL; | |
284 | bssid = NULL; | |
285 | } | |
286 | ||
287 | err = ar9170_set_mac_reg(ar, AR9170_MAC_REG_MAC_ADDR_L, mac_addr); | |
288 | if (err) | |
289 | return err; | |
290 | ||
291 | err = ar9170_set_mac_reg(ar, AR9170_MAC_REG_BSSID_L, bssid); | |
292 | if (err) | |
293 | return err; | |
294 | ||
295 | err = ar9170_set_promiscouous(ar); | |
296 | if (err) | |
297 | return err; | |
298 | ||
299 | ar9170_regwrite_begin(ar); | |
300 | ||
301 | ar9170_regwrite(AR9170_MAC_REG_POWERMANAGEMENT, pm_mode); | |
302 | ar9170_regwrite_finish(); | |
303 | ||
304 | return ar9170_regwrite_result(); | |
305 | } | |
306 | ||
307 | int ar9170_set_hwretry_limit(struct ar9170 *ar, unsigned int max_retry) | |
308 | { | |
309 | u32 tmp = min_t(u32, 0x33333, max_retry * 0x11111); | |
310 | ||
311 | return ar9170_write_reg(ar, AR9170_MAC_REG_RETRY_MAX, tmp); | |
312 | } | |
313 | ||
314 | int ar9170_set_beacon_timers(struct ar9170 *ar) | |
315 | { | |
316 | u32 v = 0; | |
317 | u32 pretbtt = 0; | |
318 | ||
319 | v |= ar->hw->conf.beacon_int; | |
320 | ||
321 | if (ar->vif) { | |
322 | switch (ar->vif->type) { | |
323 | case NL80211_IFTYPE_MESH_POINT: | |
324 | case NL80211_IFTYPE_ADHOC: | |
325 | v |= BIT(25); | |
326 | break; | |
327 | case NL80211_IFTYPE_AP: | |
328 | v |= BIT(24); | |
329 | pretbtt = (ar->hw->conf.beacon_int - 6) << 16; | |
330 | break; | |
331 | default: | |
332 | break; | |
333 | } | |
334 | ||
335 | v |= ar->vif->bss_conf.dtim_period << 16; | |
336 | } | |
337 | ||
338 | ar9170_regwrite_begin(ar); | |
339 | ||
340 | ar9170_regwrite(AR9170_MAC_REG_PRETBTT, pretbtt); | |
341 | ar9170_regwrite(AR9170_MAC_REG_BCN_PERIOD, v); | |
342 | ar9170_regwrite_finish(); | |
343 | return ar9170_regwrite_result(); | |
344 | } | |
345 | ||
346 | int ar9170_update_beacon(struct ar9170 *ar) | |
347 | { | |
348 | struct sk_buff *skb; | |
349 | __le32 *data, *old = NULL; | |
350 | u32 word; | |
351 | int i; | |
352 | ||
353 | skb = ieee80211_beacon_get(ar->hw, ar->vif); | |
354 | if (!skb) | |
355 | return -ENOMEM; | |
356 | ||
357 | data = (__le32 *)skb->data; | |
358 | if (ar->beacon) | |
359 | old = (__le32 *)ar->beacon->data; | |
360 | ||
361 | ar9170_regwrite_begin(ar); | |
362 | for (i = 0; i < DIV_ROUND_UP(skb->len, 4); i++) { | |
363 | /* | |
364 | * XXX: This accesses beyond skb data for up | |
365 | * to the last 3 bytes!! | |
366 | */ | |
367 | ||
368 | if (old && (data[i] == old[i])) | |
369 | continue; | |
370 | ||
371 | word = le32_to_cpu(data[i]); | |
372 | ar9170_regwrite(AR9170_BEACON_BUFFER_ADDRESS + 4 * i, word); | |
373 | } | |
374 | ||
375 | /* XXX: use skb->cb info */ | |
376 | if (ar->hw->conf.channel->band == IEEE80211_BAND_2GHZ) | |
377 | ar9170_regwrite(AR9170_MAC_REG_BCN_PLCP, | |
378 | ((skb->len + 4) << (3+16)) + 0x0400); | |
379 | else | |
380 | ar9170_regwrite(AR9170_MAC_REG_BCN_PLCP, | |
381 | ((skb->len + 4) << (3+16)) + 0x0400); | |
382 | ||
383 | ar9170_regwrite(AR9170_MAC_REG_BCN_LENGTH, skb->len + 4); | |
384 | ar9170_regwrite(AR9170_MAC_REG_BCN_ADDR, AR9170_BEACON_BUFFER_ADDRESS); | |
385 | ar9170_regwrite(AR9170_MAC_REG_BCN_CTRL, 1); | |
386 | ||
387 | ar9170_regwrite_finish(); | |
388 | ||
389 | dev_kfree_skb(ar->beacon); | |
390 | ar->beacon = skb; | |
391 | ||
392 | return ar9170_regwrite_result(); | |
393 | } | |
394 | ||
395 | void ar9170_new_beacon(struct work_struct *work) | |
396 | { | |
397 | struct ar9170 *ar = container_of(work, struct ar9170, | |
398 | beacon_work); | |
399 | struct sk_buff *skb; | |
400 | ||
401 | if (unlikely(!IS_STARTED(ar))) | |
402 | return ; | |
403 | ||
404 | mutex_lock(&ar->mutex); | |
405 | ||
406 | if (!ar->vif) | |
407 | goto out; | |
408 | ||
409 | ar9170_update_beacon(ar); | |
410 | ||
411 | rcu_read_lock(); | |
412 | while ((skb = ieee80211_get_buffered_bc(ar->hw, ar->vif))) | |
413 | ar9170_op_tx(ar->hw, skb); | |
414 | ||
415 | rcu_read_unlock(); | |
416 | ||
417 | out: | |
418 | mutex_unlock(&ar->mutex); | |
419 | } | |
420 | ||
421 | int ar9170_upload_key(struct ar9170 *ar, u8 id, const u8 *mac, u8 ktype, | |
422 | u8 keyidx, u8 *keydata, int keylen) | |
423 | { | |
424 | __le32 vals[7]; | |
425 | static const u8 bcast[ETH_ALEN] = | |
426 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; | |
427 | u8 dummy; | |
428 | ||
429 | mac = mac ? : bcast; | |
430 | ||
431 | vals[0] = cpu_to_le32((keyidx << 16) + id); | |
432 | vals[1] = cpu_to_le32(mac[1] << 24 | mac[0] << 16 | ktype); | |
433 | vals[2] = cpu_to_le32(mac[5] << 24 | mac[4] << 16 | | |
434 | mac[3] << 8 | mac[2]); | |
435 | memset(&vals[3], 0, 16); | |
436 | if (keydata) | |
437 | memcpy(&vals[3], keydata, keylen); | |
438 | ||
439 | return ar->exec_cmd(ar, AR9170_CMD_EKEY, | |
440 | sizeof(vals), (u8 *)vals, | |
441 | 1, &dummy); | |
442 | } | |
443 | ||
444 | int ar9170_disable_key(struct ar9170 *ar, u8 id) | |
445 | { | |
446 | __le32 val = cpu_to_le32(id); | |
447 | u8 dummy; | |
448 | ||
449 | return ar->exec_cmd(ar, AR9170_CMD_EKEY, | |
450 | sizeof(val), (u8 *)&val, | |
451 | 1, &dummy); | |
452 | } |