summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/realtek/rtw88/ps.c
blob: 07e8cbd436cd81a32b72193b39b7a7926f97f8f1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/* Copyright(c) 2018-2019  Realtek Corporation
 */

#include "main.h"
#include "reg.h"
#include "fw.h"
#include "ps.h"
#include "mac.h"
#include "coex.h"
#include "debug.h"

static int rtw_ips_pwr_up(struct rtw_dev *rtwdev)
{
	int ret;

	ret = rtw_core_start(rtwdev);
	if (ret)
		rtw_err(rtwdev, "leave idle state failed\n");

	rtw_coex_ips_notify(rtwdev, COEX_IPS_LEAVE);
	rtw_set_channel(rtwdev);

	return ret;
}

int rtw_enter_ips(struct rtw_dev *rtwdev)
{
	if (!test_bit(RTW_FLAG_POWERON, rtwdev->flags))
		return 0;

	rtw_coex_ips_notify(rtwdev, COEX_IPS_ENTER);

	rtw_core_stop(rtwdev);
	rtw_hci_link_ps(rtwdev, true);

	return 0;
}

static void rtw_restore_port_cfg_iter(void *data, struct ieee80211_vif *vif)
{
	struct rtw_dev *rtwdev = data;
	struct rtw_vif *rtwvif = (struct rtw_vif *)vif->drv_priv;
	u32 config = ~0;

	rtw_vif_port_config(rtwdev, rtwvif, config);
}

int rtw_leave_ips(struct rtw_dev *rtwdev)
{
	int ret;

	if (test_bit(RTW_FLAG_POWERON, rtwdev->flags))
		return 0;

	rtw_hci_link_ps(rtwdev, false);

	ret = rtw_ips_pwr_up(rtwdev);
	if (ret) {
		rtw_err(rtwdev, "failed to leave ips state\n");
		return ret;
	}

	rtw_iterate_vifs(rtwdev, rtw_restore_port_cfg_iter, rtwdev);

	return 0;
}

void rtw_power_mode_change(struct rtw_dev *rtwdev, bool enter)
{
	u8 request, confirm, polling;
	int ret;

	request = rtw_read8(rtwdev, rtwdev->hci.rpwm_addr);
	confirm = rtw_read8(rtwdev, rtwdev->hci.cpwm_addr);

	/* toggle to request power mode, others remain 0 */
	request ^= request | BIT_RPWM_TOGGLE;
	if (enter) {
		request |= POWER_MODE_LCLK;
		if (rtw_get_lps_deep_mode(rtwdev) == LPS_DEEP_MODE_PG)
			request |= POWER_MODE_PG;
	}
	/* Each request require an ack from firmware */
	request |= POWER_MODE_ACK;

	if (rtw_fw_feature_check(&rtwdev->fw, FW_FEATURE_TX_WAKE))
		request |= POWER_TX_WAKE;

	rtw_write8(rtwdev, rtwdev->hci.rpwm_addr, request);

	/* Check firmware get the power requset and ack via cpwm register */
	ret = read_poll_timeout_atomic(rtw_read8, polling,
				       (polling ^ confirm) & BIT_RPWM_TOGGLE,
				       100, 15000, true, rtwdev,
				       rtwdev->hci.cpwm_addr);
	if (ret) {
		/* Hit here means that driver failed to get an ack from firmware.
		 * The reason could be that hardware is locked at Deep sleep,
		 * so most of the hardware circuits are not working, even
		 * register read/write; or firmware is locked in some state and
		 * cannot get the request. It should be treated as fatal error
		 * and requires an entire analysis about the firmware/hardware.
		 */
		WARN(1, "firmware failed to ack driver for %s Deep Power mode\n",
		     enter ? "entering" : "leaving");
	}
}
EXPORT_SYMBOL(rtw_power_mode_change);

static void __rtw_leave_lps_deep(struct rtw_dev *rtwdev)
{
	rtw_hci_deep_ps(rtwdev, false);
}

static int __rtw_fw_leave_lps_check_reg(struct rtw_dev *rtwdev)
{
	int i;

	/* Driver needs to wait for firmware to leave LPS state
	 * successfully. Firmware will send null packet to inform AP,
	 * and see if AP sends an ACK back, then firmware will restore
	 * the REG_TCR register.
	 *
	 * If driver does not wait for firmware, null packet with
	 * PS bit could be sent due to incorrect REG_TCR setting.
	 *
	 * In our test, 100ms should be enough for firmware to finish
	 * the flow. If REG_TCR Register is still incorrect after 100ms,
	 * just modify it directly, and throw a warn message.
	 */
	for (i = 0 ; i < LEAVE_LPS_TRY_CNT; i++) {
		if (rtw_read32_mask(rtwdev, REG_TCR, BIT_PWRMGT_HWDATA_EN) == 0)
			return 0;
		msleep(20);
	}

	return -EBUSY;
}

static  int __rtw_fw_leave_lps_check_c2h(struct rtw_dev *rtwdev)
{
	if (wait_for_completion_timeout(&rtwdev->lps_leave_check,
					LEAVE_LPS_TIMEOUT))
		return 0;
	return -EBUSY;
}

static void rtw_fw_leave_lps_check(struct rtw_dev *rtwdev)
{
	bool ret = false;
	struct rtw_fw_state *fw;

	if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags))
		fw = &rtwdev->wow_fw;
	else
		fw = &rtwdev->fw;

	if (rtw_fw_feature_check(fw, FW_FEATURE_LPS_C2H))
		ret = __rtw_fw_leave_lps_check_c2h(rtwdev);
	else
		ret = __rtw_fw_leave_lps_check_reg(rtwdev);

	if (ret) {
		rtw_write32_clr(rtwdev, REG_TCR, BIT_PWRMGT_HWDATA_EN);
		rtw_warn(rtwdev, "firmware failed to leave lps state\n");
	}
}

static void rtw_fw_leave_lps_check_prepare(struct rtw_dev *rtwdev)
{
	struct rtw_fw_state *fw;

	if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags))
		fw = &rtwdev->wow_fw;
	else
		fw = &rtwdev->fw;

	if (rtw_fw_feature_check(fw, FW_FEATURE_LPS_C2H))
		reinit_completion(&rtwdev->lps_leave_check);
}

static void rtw_leave_lps_core(struct rtw_dev *rtwdev)
{
	struct rtw_lps_conf *conf = &rtwdev->lps_conf;

	conf->state = RTW_ALL_ON;
	conf->awake_interval = 1;
	conf->rlbm = 0;
	conf->smart_ps = 0;

	rtw_hci_link_ps(rtwdev, false);
	rtw_fw_leave_lps_check_prepare(rtwdev);
	rtw_fw_set_pwr_mode(rtwdev);
	rtw_fw_leave_lps_check(rtwdev);

	clear_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags);

	rtw_coex_lps_notify(rtwdev, COEX_LPS_DISABLE);
}

enum rtw_lps_deep_mode rtw_get_lps_deep_mode(struct rtw_dev *rtwdev)
{
	if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags))
		return rtwdev->lps_conf.wow_deep_mode;
	else
		return rtwdev->lps_conf.deep_mode;
}

static void __rtw_enter_lps_deep(struct rtw_dev *rtwdev)
{
	if (rtw_get_lps_deep_mode(rtwdev) == LPS_DEEP_MODE_NONE)
		return;

	if (!test_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags)) {
		rtw_dbg(rtwdev, RTW_DBG_PS,
			"Should enter LPS before entering deep PS\n");
		return;
	}

	if (rtw_get_lps_deep_mode(rtwdev) == LPS_DEEP_MODE_PG)
		rtw_fw_set_pg_info(rtwdev);

	rtw_hci_deep_ps(rtwdev, true);
}

static void rtw_enter_lps_core(struct rtw_dev *rtwdev)
{
	struct rtw_lps_conf *conf = &rtwdev->lps_conf;

	conf->state = RTW_RF_OFF;
	conf->awake_interval = 1;
	conf->rlbm = 1;
	conf->smart_ps = 2;

	rtw_coex_lps_notify(rtwdev, COEX_LPS_ENABLE);

	rtw_fw_set_pwr_mode(rtwdev);
	rtw_hci_link_ps(rtwdev, true);

	set_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags);
}

static void __rtw_enter_lps(struct rtw_dev *rtwdev, u8 port_id)
{
	struct rtw_lps_conf *conf = &rtwdev->lps_conf;

	if (test_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags))
		return;

	conf->mode = RTW_MODE_LPS;
	conf->port_id = port_id;

	rtw_enter_lps_core(rtwdev);
}

static void __rtw_leave_lps(struct rtw_dev *rtwdev)
{
	struct rtw_lps_conf *conf = &rtwdev->lps_conf;

	if (test_and_clear_bit(RTW_FLAG_LEISURE_PS_DEEP, rtwdev->flags)) {
		rtw_dbg(rtwdev, RTW_DBG_PS,
			"Should leave deep PS before leaving LPS\n");
		__rtw_leave_lps_deep(rtwdev);
	}

	if (!test_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags))
		return;

	conf->mode = RTW_MODE_ACTIVE;

	rtw_leave_lps_core(rtwdev);
}

void rtw_enter_lps(struct rtw_dev *rtwdev, u8 port_id)
{
	lockdep_assert_held(&rtwdev->mutex);

	if (rtwdev->coex.stat.wl_force_lps_ctrl)
		return;

	__rtw_enter_lps(rtwdev, port_id);
	__rtw_enter_lps_deep(rtwdev);
}

void rtw_leave_lps(struct rtw_dev *rtwdev)
{
	lockdep_assert_held(&rtwdev->mutex);

	__rtw_leave_lps_deep(rtwdev);
	__rtw_leave_lps(rtwdev);
}

void rtw_leave_lps_deep(struct rtw_dev *rtwdev)
{
	lockdep_assert_held(&rtwdev->mutex);

	__rtw_leave_lps_deep(rtwdev);
}

struct rtw_vif_recalc_lps_iter_data {
	struct rtw_dev *rtwdev;
	struct ieee80211_vif *found_vif;
	int count;
};

static void __rtw_vif_recalc_lps(struct rtw_vif_recalc_lps_iter_data *data,
				 struct ieee80211_vif *vif)
{
	if (data->count < 0)
		return;

	if (vif->type != NL80211_IFTYPE_STATION) {
		data->count = -1;
		return;
	}

	data->count++;
	data->found_vif = vif;
}

static void rtw_vif_recalc_lps_iter(void *data, struct ieee80211_vif *vif)
{
	__rtw_vif_recalc_lps(data, vif);
}

void rtw_recalc_lps(struct rtw_dev *rtwdev, struct ieee80211_vif *new_vif)
{
	struct rtw_vif_recalc_lps_iter_data data = { .rtwdev = rtwdev };

	if (new_vif)
		__rtw_vif_recalc_lps(&data, new_vif);
	rtw_iterate_vifs(rtwdev, rtw_vif_recalc_lps_iter, &data);

	if (data.count == 1 && data.found_vif->cfg.ps) {
		rtwdev->ps_enabled = true;
	} else {
		rtwdev->ps_enabled = false;
		rtw_leave_lps(rtwdev);
	}
}