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1// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2/* Copyright(c) 2018-2019 Realtek Corporation
3 */
4
5#include "main.h"
6#include "fw.h"
7#include "wow.h"
8#include "reg.h"
9#include "debug.h"
10#include "mac.h"
11#include "ps.h"
12
13static void rtw_wow_show_wakeup_reason(struct rtw_dev *rtwdev)
14{
15 struct cfg80211_wowlan_nd_info nd_info;
16 struct cfg80211_wowlan_wakeup wakeup = {
17 .pattern_idx = -1,
18 };
19 u8 reason;
20
21 reason = rtw_read8(rtwdev, REG_WOWLAN_WAKE_REASON);
22
23 switch (reason) {
24 case RTW_WOW_RSN_RX_DEAUTH:
25 wakeup.disconnect = true;
26 rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: Rx deauth\n");
27 break;
28 case RTW_WOW_RSN_DISCONNECT:
29 wakeup.disconnect = true;
30 rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: AP is off\n");
31 break;
32 case RTW_WOW_RSN_RX_MAGIC_PKT:
33 wakeup.magic_pkt = true;
34 rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: Rx magic packet\n");
35 break;
36 case RTW_WOW_RSN_RX_GTK_REKEY:
37 wakeup.gtk_rekey_failure = true;
38 rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: Rx gtk rekey\n");
39 break;
40 case RTW_WOW_RSN_RX_PATTERN_MATCH:
41 /* Current firmware and driver don't report pattern index
42 * Use pattern_idx to 0 defaultly.
43 */
44 wakeup.pattern_idx = 0;
45 rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: Rx pattern match packet\n");
46 break;
47 case RTW_WOW_RSN_RX_NLO:
48 /* Current firmware and driver don't report ssid index.
49 * Use 0 for n_matches based on its comment.
50 */
51 nd_info.n_matches = 0;
52 wakeup.net_detect = &nd_info;
53 rtw_dbg(rtwdev, RTW_DBG_WOW, "Rx NLO\n");
54 break;
55 default:
56 rtw_warn(rtwdev, "Unknown wakeup reason %x\n", reason);
57 ieee80211_report_wowlan_wakeup(rtwdev->wow.wow_vif, NULL,
58 GFP_KERNEL);
59 return;
60 }
61 ieee80211_report_wowlan_wakeup(rtwdev->wow.wow_vif, &wakeup,
62 GFP_KERNEL);
63}
64
65static void rtw_wow_pattern_write_cam(struct rtw_dev *rtwdev, u8 addr,
66 u32 wdata)
67{
68 rtw_write32(rtwdev, REG_WKFMCAM_RWD, wdata);
69 rtw_write32(rtwdev, REG_WKFMCAM_CMD, BIT_WKFCAM_POLLING_V1 |
70 BIT_WKFCAM_WE | BIT_WKFCAM_ADDR_V2(addr));
71
72 if (!check_hw_ready(rtwdev, REG_WKFMCAM_CMD, BIT_WKFCAM_POLLING_V1, 0))
73 rtw_err(rtwdev, "failed to write pattern cam\n");
74}
75
76static void rtw_wow_pattern_write_cam_ent(struct rtw_dev *rtwdev, u8 id,
77 struct rtw_wow_pattern *rtw_pattern)
78{
79 int i;
80 u8 addr;
81 u32 wdata;
82
83 for (i = 0; i < RTW_MAX_PATTERN_MASK_SIZE / 4; i++) {
84 addr = (id << 3) + i;
85 wdata = rtw_pattern->mask[i * 4];
86 wdata |= rtw_pattern->mask[i * 4 + 1] << 8;
87 wdata |= rtw_pattern->mask[i * 4 + 2] << 16;
88 wdata |= rtw_pattern->mask[i * 4 + 3] << 24;
89 rtw_wow_pattern_write_cam(rtwdev, addr, wdata);
90 }
91
92 wdata = rtw_pattern->crc;
93 addr = (id << 3) + RTW_MAX_PATTERN_MASK_SIZE / 4;
94
95 switch (rtw_pattern->type) {
96 case RTW_PATTERN_BROADCAST:
97 wdata |= BIT_WKFMCAM_BC | BIT_WKFMCAM_VALID;
98 break;
99 case RTW_PATTERN_MULTICAST:
100 wdata |= BIT_WKFMCAM_MC | BIT_WKFMCAM_VALID;
101 break;
102 case RTW_PATTERN_UNICAST:
103 wdata |= BIT_WKFMCAM_UC | BIT_WKFMCAM_VALID;
104 break;
105 default:
106 break;
107 }
108 rtw_wow_pattern_write_cam(rtwdev, addr, wdata);
109}
110
111/* RTK internal CRC16 for Pattern Cam */
112static u16 __rtw_cal_crc16(u8 data, u16 crc)
113{
114 u8 shift_in, data_bit;
115 u8 crc_bit4, crc_bit11, crc_bit15;
116 u16 crc_result;
117 int index;
118
119 for (index = 0; index < 8; index++) {
120 crc_bit15 = ((crc & BIT(15)) ? 1 : 0);
121 data_bit = (data & (BIT(0) << index) ? 1 : 0);
122 shift_in = crc_bit15 ^ data_bit;
123
124 crc_result = crc << 1;
125
126 if (shift_in == 0)
127 crc_result &= (~BIT(0));
128 else
129 crc_result |= BIT(0);
130
131 crc_bit11 = ((crc & BIT(11)) ? 1 : 0) ^ shift_in;
132
133 if (crc_bit11 == 0)
134 crc_result &= (~BIT(12));
135 else
136 crc_result |= BIT(12);
137
138 crc_bit4 = ((crc & BIT(4)) ? 1 : 0) ^ shift_in;
139
140 if (crc_bit4 == 0)
141 crc_result &= (~BIT(5));
142 else
143 crc_result |= BIT(5);
144
145 crc = crc_result;
146 }
147 return crc;
148}
149
150static u16 rtw_calc_crc(u8 *pdata, int length)
151{
152 u16 crc = 0xffff;
153 int i;
154
155 for (i = 0; i < length; i++)
156 crc = __rtw_cal_crc16(pdata[i], crc);
157
158 /* get 1' complement */
159 return ~crc;
160}
161
162static void rtw_wow_pattern_generate(struct rtw_dev *rtwdev,
163 struct rtw_vif *rtwvif,
164 const struct cfg80211_pkt_pattern *pkt_pattern,
165 struct rtw_wow_pattern *rtw_pattern)
166{
167 const u8 *mask;
168 const u8 *pattern;
169 u8 mask_hw[RTW_MAX_PATTERN_MASK_SIZE] = {0};
170 u8 content[RTW_MAX_PATTERN_SIZE] = {0};
171 u8 mac_addr[ETH_ALEN] = {0};
172 u8 mask_len;
173 u16 count;
174 int len;
175 int i;
176
177 pattern = pkt_pattern->pattern;
178 len = pkt_pattern->pattern_len;
179 mask = pkt_pattern->mask;
180
181 ether_addr_copy(mac_addr, rtwvif->mac_addr);
182 memset(rtw_pattern, 0, sizeof(*rtw_pattern));
183
184 mask_len = DIV_ROUND_UP(len, 8);
185
186 if (is_broadcast_ether_addr(pattern))
187 rtw_pattern->type = RTW_PATTERN_BROADCAST;
188 else if (is_multicast_ether_addr(pattern))
189 rtw_pattern->type = RTW_PATTERN_MULTICAST;
190 else if (ether_addr_equal(pattern, mac_addr))
191 rtw_pattern->type = RTW_PATTERN_UNICAST;
192 else
193 rtw_pattern->type = RTW_PATTERN_INVALID;
194
195 /* translate mask from os to mask for hw
196 * pattern from OS uses 'ethenet frame', like this:
197 * | 6 | 6 | 2 | 20 | Variable | 4 |
198 * |--------+--------+------+-----------+------------+-----|
199 * | 802.3 Mac Header | IP Header | TCP Packet | FCS |
200 * | DA | SA | Type |
201 *
202 * BUT, packet catched by our HW is in '802.11 frame', begin from LLC
203 * | 24 or 30 | 6 | 2 | 20 | Variable | 4 |
204 * |-------------------+--------+------+-----------+------------+-----|
205 * | 802.11 MAC Header | LLC | IP Header | TCP Packet | FCS |
206 * | Others | Tpye |
207 *
208 * Therefore, we need translate mask_from_OS to mask_to_hw.
209 * We should left-shift mask by 6 bits, then set the new bit[0~5] = 0,
210 * because new mask[0~5] means 'SA', but our HW packet begins from LLC,
211 * bit[0~5] corresponds to first 6 Bytes in LLC, they just don't match.
212 */
213
214 /* Shift 6 bits */
215 for (i = 0; i < mask_len - 1; i++) {
216 mask_hw[i] = u8_get_bits(mask[i], GENMASK(7, 6));
217 mask_hw[i] |= u8_get_bits(mask[i + 1], GENMASK(5, 0)) << 2;
218 }
219 mask_hw[i] = u8_get_bits(mask[i], GENMASK(7, 6));
220
221 /* Set bit 0-5 to zero */
222 mask_hw[0] &= (~GENMASK(5, 0));
223
224 memcpy(rtw_pattern->mask, mask_hw, RTW_MAX_PATTERN_MASK_SIZE);
225
226 /* To get the wake up pattern from the mask.
227 * We do not count first 12 bits which means
228 * DA[6] and SA[6] in the pattern to match HW design.
229 */
230 count = 0;
231 for (i = 12; i < len; i++) {
232 if ((mask[i / 8] >> (i % 8)) & 0x01) {
233 content[count] = pattern[i];
234 count++;
235 }
236 }
237
238 rtw_pattern->crc = rtw_calc_crc(content, count);
239}
240
241static void rtw_wow_pattern_clear_cam(struct rtw_dev *rtwdev)
242{
243 bool ret;
244
245 rtw_write32(rtwdev, REG_WKFMCAM_CMD, BIT_WKFCAM_POLLING_V1 |
246 BIT_WKFCAM_CLR_V1);
247
248 ret = check_hw_ready(rtwdev, REG_WKFMCAM_CMD, BIT_WKFCAM_POLLING_V1, 0);
249 if (!ret)
250 rtw_err(rtwdev, "failed to clean pattern cam\n");
251}
252
253static void rtw_wow_pattern_write(struct rtw_dev *rtwdev)
254{
255 struct rtw_wow_param *rtw_wow = &rtwdev->wow;
256 struct rtw_wow_pattern *rtw_pattern = rtw_wow->patterns;
257 int i = 0;
258
259 for (i = 0; i < rtw_wow->pattern_cnt; i++)
260 rtw_wow_pattern_write_cam_ent(rtwdev, i, rtw_pattern + i);
261}
262
263static void rtw_wow_pattern_clear(struct rtw_dev *rtwdev)
264{
265 struct rtw_wow_param *rtw_wow = &rtwdev->wow;
266
267 rtw_wow_pattern_clear_cam(rtwdev);
268
269 rtw_wow->pattern_cnt = 0;
270 memset(rtw_wow->patterns, 0, sizeof(rtw_wow->patterns));
271}
272
273static void rtw_wow_bb_stop(struct rtw_dev *rtwdev)
274{
275 struct rtw_wow_param *rtw_wow = &rtwdev->wow;
276
277 /* wait 100ms for firmware to finish TX */
278 msleep(100);
279
280 if (!rtw_read32_mask(rtwdev, REG_BCNQ_INFO, BIT_MGQ_CPU_EMPTY))
281 rtw_warn(rtwdev, "Wrong status of MGQ_CPU empty!\n");
282
283 rtw_wow->txpause = rtw_read8(rtwdev, REG_TXPAUSE);
284 rtw_write8(rtwdev, REG_TXPAUSE, 0xff);
285 rtw_write8_clr(rtwdev, REG_SYS_FUNC_EN, BIT_FEN_BB_RSTB);
286}
287
288static void rtw_wow_bb_start(struct rtw_dev *rtwdev)
289{
290 struct rtw_wow_param *rtw_wow = &rtwdev->wow;
291
292 rtw_write8_set(rtwdev, REG_SYS_FUNC_EN, BIT_FEN_BB_RSTB);
293 rtw_write8(rtwdev, REG_TXPAUSE, rtw_wow->txpause);
294}
295
296static void rtw_wow_rx_dma_stop(struct rtw_dev *rtwdev)
297{
298 /* wait 100ms for HW to finish rx dma */
299 msleep(100);
300
301 rtw_write32_set(rtwdev, REG_RXPKT_NUM, BIT_RW_RELEASE);
302
303 if (!check_hw_ready(rtwdev, REG_RXPKT_NUM, BIT_RXDMA_IDLE, 1))
304 rtw_err(rtwdev, "failed to stop rx dma\n");
305}
306
307static void rtw_wow_rx_dma_start(struct rtw_dev *rtwdev)
308{
309 rtw_write32_clr(rtwdev, REG_RXPKT_NUM, BIT_RW_RELEASE);
310}
311
312static int rtw_wow_check_fw_status(struct rtw_dev *rtwdev, bool wow_enable)
313{
314 int ret;
315 u8 check;
316 u32 check_dis;
317
318 if (wow_enable) {
319 ret = read_poll_timeout(rtw_read8, check, !check, 1000,
320 100000, true, rtwdev,
321 REG_WOWLAN_WAKE_REASON);
322 if (ret)
323 goto wow_fail;
324 } else {
325 ret = read_poll_timeout(rtw_read32_mask, check_dis,
326 !check_dis, 1000, 100000, true, rtwdev,
327 REG_FE1IMR, BIT_FS_RXDONE);
328 if (ret)
329 goto wow_fail;
330 ret = read_poll_timeout(rtw_read32_mask, check_dis,
331 !check_dis, 1000, 100000, false, rtwdev,
332 REG_RXPKT_NUM, BIT_RW_RELEASE);
333 if (ret)
334 goto wow_fail;
335 }
336
337 return 0;
338
339wow_fail:
340 rtw_err(rtwdev, "failed to check wow status %s\n",
341 wow_enable ? "enabled" : "disabled");
342 return -EBUSY;
343}
344
345static void rtw_wow_fw_security_type_iter(struct ieee80211_hw *hw,
346 struct ieee80211_vif *vif,
347 struct ieee80211_sta *sta,
348 struct ieee80211_key_conf *key,
349 void *data)
350{
351 struct rtw_fw_key_type_iter_data *iter_data = data;
352 struct rtw_dev *rtwdev = hw->priv;
353 u8 hw_key_type;
354
355 if (vif != rtwdev->wow.wow_vif)
356 return;
357
358 switch (key->cipher) {
359 case WLAN_CIPHER_SUITE_WEP40:
360 hw_key_type = RTW_CAM_WEP40;
361 break;
362 case WLAN_CIPHER_SUITE_WEP104:
363 hw_key_type = RTW_CAM_WEP104;
364 break;
365 case WLAN_CIPHER_SUITE_TKIP:
366 hw_key_type = RTW_CAM_TKIP;
367 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
368 break;
369 case WLAN_CIPHER_SUITE_CCMP:
370 hw_key_type = RTW_CAM_AES;
371 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX;
372 break;
373 default:
374 rtw_err(rtwdev, "Unsupported key type for wowlan mode: %#x\n",
375 key->cipher);
376 hw_key_type = 0;
377 break;
378 }
379
380 if (sta)
381 iter_data->pairwise_key_type = hw_key_type;
382 else
383 iter_data->group_key_type = hw_key_type;
384}
385
386static void rtw_wow_fw_security_type(struct rtw_dev *rtwdev)
387{
388 struct rtw_fw_key_type_iter_data data = {};
389 struct ieee80211_vif *wow_vif = rtwdev->wow.wow_vif;
390
391 data.rtwdev = rtwdev;
392 rtw_iterate_keys(rtwdev, wow_vif,
393 rtw_wow_fw_security_type_iter, &data);
394 rtw_fw_set_aoac_global_info_cmd(rtwdev, data.pairwise_key_type,
395 data.group_key_type);
396}
397
398static int rtw_wow_fw_start(struct rtw_dev *rtwdev)
399{
400 if (rtw_wow_mgd_linked(rtwdev)) {
401 rtw_send_rsvd_page_h2c(rtwdev);
402 rtw_wow_pattern_write(rtwdev);
403 rtw_wow_fw_security_type(rtwdev);
404 rtw_fw_set_disconnect_decision_cmd(rtwdev, true);
405 rtw_fw_set_keep_alive_cmd(rtwdev, true);
406 } else if (rtw_wow_no_link(rtwdev)) {
407 rtw_fw_set_nlo_info(rtwdev, true);
408 rtw_fw_update_pkt_probe_req(rtwdev, NULL);
409 rtw_fw_channel_switch(rtwdev, true);
410 }
411
412 rtw_fw_set_wowlan_ctrl_cmd(rtwdev, true);
413 rtw_fw_set_remote_wake_ctrl_cmd(rtwdev, true);
414
415 return rtw_wow_check_fw_status(rtwdev, true);
416}
417
418static int rtw_wow_fw_stop(struct rtw_dev *rtwdev)
419{
420 if (rtw_wow_mgd_linked(rtwdev)) {
421 rtw_fw_set_disconnect_decision_cmd(rtwdev, false);
422 rtw_fw_set_keep_alive_cmd(rtwdev, false);
423 rtw_wow_pattern_clear(rtwdev);
424 } else if (rtw_wow_no_link(rtwdev)) {
425 rtw_fw_channel_switch(rtwdev, false);
426 rtw_fw_set_nlo_info(rtwdev, false);
427 }
428
429 rtw_fw_set_wowlan_ctrl_cmd(rtwdev, false);
430 rtw_fw_set_remote_wake_ctrl_cmd(rtwdev, false);
431
432 return rtw_wow_check_fw_status(rtwdev, false);
433}
434
435static void rtw_wow_avoid_reset_mac(struct rtw_dev *rtwdev)
436{
437 /* When resuming from wowlan mode, some hosts issue signal
438 * (PCIE: PREST, USB: SE0RST) to device, and lead to reset
439 * mac core. If it happens, the connection to AP will be lost.
440 * Setting REG_RSV_CTRL Register can avoid this process.
441 */
442 switch (rtw_hci_type(rtwdev)) {
443 case RTW_HCI_TYPE_PCIE:
444 case RTW_HCI_TYPE_USB:
445 rtw_write8(rtwdev, REG_RSV_CTRL, BIT_WLOCK_1C_B6);
446 rtw_write8(rtwdev, REG_RSV_CTRL,
447 BIT_WLOCK_1C_B6 | BIT_R_DIS_PRST);
448 break;
449 default:
450 rtw_warn(rtwdev, "Unsupported hci type to disable reset MAC\n");
451 break;
452 }
453}
454
455static void rtw_wow_fw_media_status_iter(void *data, struct ieee80211_sta *sta)
456{
457 struct rtw_sta_info *si = (struct rtw_sta_info *)sta->drv_priv;
458 struct rtw_fw_media_status_iter_data *iter_data = data;
459 struct rtw_dev *rtwdev = iter_data->rtwdev;
460
461 rtw_fw_media_status_report(rtwdev, si->mac_id, iter_data->connect);
462}
463
464static void rtw_wow_fw_media_status(struct rtw_dev *rtwdev, bool connect)
465{
466 struct rtw_fw_media_status_iter_data data;
467
468 data.rtwdev = rtwdev;
469 data.connect = connect;
470
471 rtw_iterate_stas_atomic(rtwdev, rtw_wow_fw_media_status_iter, &data);
472}
473
474static int rtw_wow_config_wow_fw_rsvd_page(struct rtw_dev *rtwdev)
475{
476 struct ieee80211_vif *wow_vif = rtwdev->wow.wow_vif;
477 struct rtw_vif *rtwvif = (struct rtw_vif *)wow_vif->drv_priv;
478
479 rtw_remove_rsvd_page(rtwdev, rtwvif);
480
481 if (rtw_wow_no_link(rtwdev))
482 rtw_add_rsvd_page_pno(rtwdev, rtwvif);
483 else
484 rtw_add_rsvd_page_sta(rtwdev, rtwvif);
485
486 return rtw_fw_download_rsvd_page(rtwdev);
487}
488
489static int rtw_wow_config_normal_fw_rsvd_page(struct rtw_dev *rtwdev)
490{
491 struct ieee80211_vif *wow_vif = rtwdev->wow.wow_vif;
492 struct rtw_vif *rtwvif = (struct rtw_vif *)wow_vif->drv_priv;
493
494 rtw_remove_rsvd_page(rtwdev, rtwvif);
495 rtw_add_rsvd_page_sta(rtwdev, rtwvif);
496
497 if (rtw_wow_no_link(rtwdev))
498 return 0;
499
500 return rtw_fw_download_rsvd_page(rtwdev);
501}
502
503static int rtw_wow_swap_fw(struct rtw_dev *rtwdev, enum rtw_fw_type type)
504{
505 struct rtw_fw_state *fw;
506 int ret;
507
508 switch (type) {
509 case RTW_WOWLAN_FW:
510 fw = &rtwdev->wow_fw;
511 break;
512
513 case RTW_NORMAL_FW:
514 fw = &rtwdev->fw;
515 break;
516
517 default:
518 rtw_warn(rtwdev, "unsupported firmware type to swap\n");
519 return -ENOENT;
520 }
521
522 ret = rtw_download_firmware(rtwdev, fw);
523 if (ret)
524 goto out;
525
526 rtw_fw_send_general_info(rtwdev);
527 rtw_fw_send_phydm_info(rtwdev);
528 rtw_wow_fw_media_status(rtwdev, true);
529
530out:
531 return ret;
532}
533
534static void rtw_wow_check_pno(struct rtw_dev *rtwdev,
535 struct cfg80211_sched_scan_request *nd_config)
536{
537 struct rtw_wow_param *rtw_wow = &rtwdev->wow;
538 struct rtw_pno_request *pno_req = &rtw_wow->pno_req;
539 struct ieee80211_channel *channel;
540 int i, size;
541
542 if (!nd_config->n_match_sets || !nd_config->n_channels)
543 goto err;
544
545 pno_req->match_set_cnt = nd_config->n_match_sets;
546 size = sizeof(*pno_req->match_sets) * pno_req->match_set_cnt;
547 pno_req->match_sets = kmemdup(nd_config->match_sets, size, GFP_KERNEL);
548 if (!pno_req->match_sets)
549 goto err;
550
551 pno_req->channel_cnt = nd_config->n_channels;
552 size = sizeof(*nd_config->channels[0]) * nd_config->n_channels;
553 pno_req->channels = kmalloc(size, GFP_KERNEL);
554 if (!pno_req->channels)
555 goto channel_err;
556
557 for (i = 0 ; i < pno_req->channel_cnt; i++) {
558 channel = pno_req->channels + i;
559 memcpy(channel, nd_config->channels[i], sizeof(*channel));
560 }
561
562 pno_req->scan_plan = *nd_config->scan_plans;
563 pno_req->inited = true;
564
565 rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: net-detect is enabled\n");
566
567 return;
568
569channel_err:
570 kfree(pno_req->match_sets);
571
572err:
573 rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: net-detect is disabled\n");
574}
575
576static int rtw_wow_leave_linked_ps(struct rtw_dev *rtwdev)
577{
578 if (!test_bit(RTW_FLAG_WOWLAN, rtwdev->flags))
579 cancel_delayed_work_sync(&rtwdev->watch_dog_work);
580
581 rtw_leave_lps(rtwdev);
582
583 return 0;
584}
585
586static int rtw_wow_leave_no_link_ps(struct rtw_dev *rtwdev)
587{
588 struct rtw_wow_param *rtw_wow = &rtwdev->wow;
589 int ret = 0;
590
591 if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags)) {
592 if (rtw_get_lps_deep_mode(rtwdev) != LPS_DEEP_MODE_NONE)
593 rtw_leave_lps_deep(rtwdev);
594 } else {
595 if (!test_bit(RTW_FLAG_POWERON, rtwdev->flags)) {
596 rtw_wow->ips_enabled = true;
597 ret = rtw_leave_ips(rtwdev);
598 if (ret)
599 return ret;
600 }
601 }
602
603 return 0;
604}
605
606static int rtw_wow_leave_ps(struct rtw_dev *rtwdev)
607{
608 int ret = 0;
609
610 if (rtw_wow_mgd_linked(rtwdev))
611 ret = rtw_wow_leave_linked_ps(rtwdev);
612 else if (rtw_wow_no_link(rtwdev))
613 ret = rtw_wow_leave_no_link_ps(rtwdev);
614
615 return ret;
616}
617
618static int rtw_wow_restore_ps(struct rtw_dev *rtwdev)
619{
620 int ret = 0;
621
622 if (rtw_wow_no_link(rtwdev) && rtwdev->wow.ips_enabled)
623 ret = rtw_enter_ips(rtwdev);
624
625 return ret;
626}
627
628static int rtw_wow_enter_linked_ps(struct rtw_dev *rtwdev)
629{
630 struct rtw_wow_param *rtw_wow = &rtwdev->wow;
631 struct ieee80211_vif *wow_vif = rtw_wow->wow_vif;
632 struct rtw_vif *rtwvif = (struct rtw_vif *)wow_vif->drv_priv;
633
634 rtw_enter_lps(rtwdev, rtwvif->port);
635
636 return 0;
637}
638
639static int rtw_wow_enter_no_link_ps(struct rtw_dev *rtwdev)
640{
641 /* firmware enters deep ps by itself if supported */
642 set_bit(RTW_FLAG_LEISURE_PS_DEEP, rtwdev->flags);
643
644 return 0;
645}
646
647static int rtw_wow_enter_ps(struct rtw_dev *rtwdev)
648{
649 int ret = 0;
650
651 if (rtw_wow_mgd_linked(rtwdev))
652 ret = rtw_wow_enter_linked_ps(rtwdev);
653 else if (rtw_wow_no_link(rtwdev) &&
654 rtw_get_lps_deep_mode(rtwdev) != LPS_DEEP_MODE_NONE)
655 ret = rtw_wow_enter_no_link_ps(rtwdev);
656
657 return ret;
658}
659
660static void rtw_wow_stop_trx(struct rtw_dev *rtwdev)
661{
662 rtw_wow_bb_stop(rtwdev);
663 rtw_wow_rx_dma_stop(rtwdev);
664}
665
666static int rtw_wow_start(struct rtw_dev *rtwdev)
667{
668 int ret;
669
670 ret = rtw_wow_fw_start(rtwdev);
671 if (ret)
672 goto out;
673
674 rtw_hci_stop(rtwdev);
675 rtw_wow_bb_start(rtwdev);
676 rtw_wow_avoid_reset_mac(rtwdev);
677
678out:
679 return ret;
680}
681
682static int rtw_wow_enable(struct rtw_dev *rtwdev)
683{
684 int ret = 0;
685
686 rtw_wow_stop_trx(rtwdev);
687
688 ret = rtw_wow_swap_fw(rtwdev, RTW_WOWLAN_FW);
689 if (ret) {
690 rtw_err(rtwdev, "failed to swap wow fw\n");
691 goto error;
692 }
693
694 set_bit(RTW_FLAG_WOWLAN, rtwdev->flags);
695
696 ret = rtw_wow_config_wow_fw_rsvd_page(rtwdev);
697 if (ret) {
698 rtw_err(rtwdev, "failed to download wowlan rsvd page\n");
699 goto error;
700 }
701
702 ret = rtw_wow_start(rtwdev);
703 if (ret) {
704 rtw_err(rtwdev, "failed to start wow\n");
705 goto error;
706 }
707
708 return ret;
709
710error:
711 clear_bit(RTW_FLAG_WOWLAN, rtwdev->flags);
712 return ret;
713}
714
715static int rtw_wow_stop(struct rtw_dev *rtwdev)
716{
717 int ret;
718
719 /* some HCI related registers will be reset after resume,
720 * need to set them again.
721 */
722 ret = rtw_hci_setup(rtwdev);
723 if (ret) {
724 rtw_err(rtwdev, "failed to setup hci\n");
725 return ret;
726 }
727
728 ret = rtw_hci_start(rtwdev);
729 if (ret) {
730 rtw_err(rtwdev, "failed to start hci\n");
731 return ret;
732 }
733
734 ret = rtw_wow_fw_stop(rtwdev);
735 if (ret)
736 rtw_err(rtwdev, "failed to stop wowlan fw\n");
737
738 rtw_wow_bb_stop(rtwdev);
739
740 return ret;
741}
742
743static void rtw_wow_resume_trx(struct rtw_dev *rtwdev)
744{
745 rtw_wow_rx_dma_start(rtwdev);
746 rtw_wow_bb_start(rtwdev);
747 ieee80211_queue_delayed_work(rtwdev->hw, &rtwdev->watch_dog_work,
748 RTW_WATCH_DOG_DELAY_TIME);
749}
750
751static int rtw_wow_disable(struct rtw_dev *rtwdev)
752{
753 int ret;
754
755 clear_bit(RTW_FLAG_WOWLAN, rtwdev->flags);
756
757 ret = rtw_wow_stop(rtwdev);
758 if (ret) {
759 rtw_err(rtwdev, "failed to stop wow\n");
760 goto out;
761 }
762
763 ret = rtw_wow_swap_fw(rtwdev, RTW_NORMAL_FW);
764 if (ret) {
765 rtw_err(rtwdev, "failed to swap normal fw\n");
766 goto out;
767 }
768
769 ret = rtw_wow_config_normal_fw_rsvd_page(rtwdev);
770 if (ret)
771 rtw_err(rtwdev, "failed to download normal rsvd page\n");
772
773out:
774 rtw_wow_resume_trx(rtwdev);
775 return ret;
776}
777
778static void rtw_wow_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
779{
780 struct rtw_dev *rtwdev = data;
781 struct rtw_vif *rtwvif = (struct rtw_vif *)vif->drv_priv;
782 struct rtw_wow_param *rtw_wow = &rtwdev->wow;
783
784 /* Current wowlan function support setting of only one STATION vif.
785 * So when one suitable vif is found, stop the iteration.
786 */
787 if (rtw_wow->wow_vif || vif->type != NL80211_IFTYPE_STATION)
788 return;
789
790 switch (rtwvif->net_type) {
791 case RTW_NET_MGD_LINKED:
792 rtw_wow->wow_vif = vif;
793 break;
794 case RTW_NET_NO_LINK:
795 if (rtw_wow->pno_req.inited)
796 rtwdev->wow.wow_vif = vif;
797 break;
798 default:
799 break;
800 }
801}
802
803static int rtw_wow_set_wakeups(struct rtw_dev *rtwdev,
804 struct cfg80211_wowlan *wowlan)
805{
806 struct rtw_wow_param *rtw_wow = &rtwdev->wow;
807 struct rtw_wow_pattern *rtw_patterns = rtw_wow->patterns;
808 struct rtw_vif *rtwvif;
809 int i;
810
811 if (wowlan->disconnect)
812 set_bit(RTW_WOW_FLAG_EN_DISCONNECT, rtw_wow->flags);
813 if (wowlan->magic_pkt)
814 set_bit(RTW_WOW_FLAG_EN_MAGIC_PKT, rtw_wow->flags);
815 if (wowlan->gtk_rekey_failure)
816 set_bit(RTW_WOW_FLAG_EN_REKEY_PKT, rtw_wow->flags);
817
818 if (wowlan->nd_config)
819 rtw_wow_check_pno(rtwdev, wowlan->nd_config);
820
821 rtw_iterate_vifs_atomic(rtwdev, rtw_wow_vif_iter, rtwdev);
822 if (!rtw_wow->wow_vif)
823 return -EPERM;
824
825 rtwvif = (struct rtw_vif *)rtw_wow->wow_vif->drv_priv;
826 if (wowlan->n_patterns && wowlan->patterns) {
827 rtw_wow->pattern_cnt = wowlan->n_patterns;
828 for (i = 0; i < wowlan->n_patterns; i++)
829 rtw_wow_pattern_generate(rtwdev, rtwvif,
830 wowlan->patterns + i,
831 rtw_patterns + i);
832 }
833
834 return 0;
835}
836
837static void rtw_wow_clear_wakeups(struct rtw_dev *rtwdev)
838{
839 struct rtw_wow_param *rtw_wow = &rtwdev->wow;
840 struct rtw_pno_request *pno_req = &rtw_wow->pno_req;
841
842 if (pno_req->inited) {
843 kfree(pno_req->channels);
844 kfree(pno_req->match_sets);
845 }
846
847 memset(rtw_wow, 0, sizeof(rtwdev->wow));
848}
849
850int rtw_wow_suspend(struct rtw_dev *rtwdev, struct cfg80211_wowlan *wowlan)
851{
852 int ret = 0;
853
854 ret = rtw_wow_set_wakeups(rtwdev, wowlan);
855 if (ret) {
856 rtw_err(rtwdev, "failed to set wakeup event\n");
857 goto out;
858 }
859
860 ret = rtw_wow_leave_ps(rtwdev);
861 if (ret) {
862 rtw_err(rtwdev, "failed to leave ps from normal mode\n");
863 goto out;
864 }
865
866 ret = rtw_wow_enable(rtwdev);
867 if (ret) {
868 rtw_err(rtwdev, "failed to enable wow\n");
869 rtw_wow_restore_ps(rtwdev);
870 goto out;
871 }
872
873 ret = rtw_wow_enter_ps(rtwdev);
874 if (ret)
875 rtw_err(rtwdev, "failed to enter ps for wow\n");
876
877out:
878 return ret;
879}
880
881int rtw_wow_resume(struct rtw_dev *rtwdev)
882{
883 int ret;
884
885 /* If wowlan mode is not enabled, do nothing */
886 if (!test_bit(RTW_FLAG_WOWLAN, rtwdev->flags)) {
887 rtw_err(rtwdev, "wow is not enabled\n");
888 ret = -EPERM;
889 goto out;
890 }
891
892 ret = rtw_wow_leave_ps(rtwdev);
893 if (ret) {
894 rtw_err(rtwdev, "failed to leave ps from wowlan mode\n");
895 goto out;
896 }
897
898 rtw_wow_show_wakeup_reason(rtwdev);
899
900 ret = rtw_wow_disable(rtwdev);
901 if (ret) {
902 rtw_err(rtwdev, "failed to disable wow\n");
903 goto out;
904 }
905
906 ret = rtw_wow_restore_ps(rtwdev);
907 if (ret)
908 rtw_err(rtwdev, "failed to restore ps to normal mode\n");
909
910out:
911 rtw_wow_clear_wakeups(rtwdev);
912 return ret;
913}