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 
13 static 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 
65 static 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 
76 static 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 */
112 static 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 
150 static 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 
162 static 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 
241 static 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 
253 static 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 
263 static 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 
273 static 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 
288 static 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 
296 static 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 
307 static void rtw_wow_rx_dma_start(struct rtw_dev *rtwdev)
308 {
309 	rtw_write32_clr(rtwdev, REG_RXPKT_NUM, BIT_RW_RELEASE);
310 }
311 
312 static 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 
339 wow_fail:
340 	rtw_err(rtwdev, "failed to check wow status %s\n",
341 		wow_enable ? "enabled" : "disabled");
342 	return -EBUSY;
343 }
344 
345 static 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 
386 static 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 
398 static 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 
418 static 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 
435 static 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 
455 static 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 
464 static 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 
474 static 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 
489 static 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 
503 static 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 
530 out:
531 	return ret;
532 }
533 
534 static 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 
569 channel_err:
570 	kfree(pno_req->match_sets);
571 
572 err:
573 	rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: net-detect is disabled\n");
574 }
575 
576 static 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 
586 static 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_INACTIVE_PS, 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 
606 static 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 
618 static 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 
628 static 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 
639 static 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 
647 static 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 
660 static 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 
666 static 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 
678 out:
679 	return ret;
680 }
681 
682 static 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 
710 error:
711 	clear_bit(RTW_FLAG_WOWLAN, rtwdev->flags);
712 	return ret;
713 }
714 
715 static 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 
743 static 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 
751 static 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 
773 out:
774 	rtw_wow_resume_trx(rtwdev);
775 	return ret;
776 }
777 
778 static 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 
803 static 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 
837 static 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 
850 int 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 
877 out:
878 	return ret;
879 }
880 
881 int 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 
910 out:
911 	rtw_wow_clear_wakeups(rtwdev);
912 	return ret;
913 }
914