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 "reg.h"
7 #include "fw.h"
8 #include "ps.h"
9 #include "mac.h"
10 #include "coex.h"
11 #include "debug.h"
12
rtw_ips_pwr_up(struct rtw_dev * rtwdev)13 static int rtw_ips_pwr_up(struct rtw_dev *rtwdev)
14 {
15 int ret;
16
17 ret = rtw_core_start(rtwdev);
18 if (ret)
19 rtw_err(rtwdev, "leave idle state failed\n");
20
21 rtw_set_channel(rtwdev);
22
23 return ret;
24 }
25
rtw_enter_ips(struct rtw_dev * rtwdev)26 int rtw_enter_ips(struct rtw_dev *rtwdev)
27 {
28 if (test_and_set_bit(RTW_FLAG_INACTIVE_PS, rtwdev->flags))
29 return 0;
30
31 rtw_coex_ips_notify(rtwdev, COEX_IPS_ENTER);
32
33 rtw_core_stop(rtwdev);
34 rtw_hci_link_ps(rtwdev, true);
35
36 return 0;
37 }
38
rtw_restore_port_cfg_iter(void * data,u8 * mac,struct ieee80211_vif * vif)39 static void rtw_restore_port_cfg_iter(void *data, u8 *mac,
40 struct ieee80211_vif *vif)
41 {
42 struct rtw_dev *rtwdev = data;
43 struct rtw_vif *rtwvif = (struct rtw_vif *)vif->drv_priv;
44 u32 config = ~0;
45
46 rtw_vif_port_config(rtwdev, rtwvif, config);
47 }
48
rtw_leave_ips(struct rtw_dev * rtwdev)49 int rtw_leave_ips(struct rtw_dev *rtwdev)
50 {
51 int ret;
52
53 if (!test_and_clear_bit(RTW_FLAG_INACTIVE_PS, rtwdev->flags))
54 return 0;
55
56 rtw_hci_link_ps(rtwdev, false);
57
58 ret = rtw_ips_pwr_up(rtwdev);
59 if (ret) {
60 rtw_err(rtwdev, "failed to leave ips state\n");
61 return ret;
62 }
63
64 rtw_iterate_vifs_atomic(rtwdev, rtw_restore_port_cfg_iter, rtwdev);
65
66 rtw_coex_ips_notify(rtwdev, COEX_IPS_LEAVE);
67
68 return 0;
69 }
70
rtw_power_mode_change(struct rtw_dev * rtwdev,bool enter)71 void rtw_power_mode_change(struct rtw_dev *rtwdev, bool enter)
72 {
73 u8 request, confirm, polling;
74 int ret;
75
76 request = rtw_read8(rtwdev, rtwdev->hci.rpwm_addr);
77 confirm = rtw_read8(rtwdev, rtwdev->hci.cpwm_addr);
78
79 /* toggle to request power mode, others remain 0 */
80 request ^= request | BIT_RPWM_TOGGLE;
81 if (enter) {
82 request |= POWER_MODE_LCLK;
83 if (rtw_get_lps_deep_mode(rtwdev) == LPS_DEEP_MODE_PG)
84 request |= POWER_MODE_PG;
85 }
86 /* Each request require an ack from firmware */
87 request |= POWER_MODE_ACK;
88
89 if (rtw_fw_feature_check(&rtwdev->fw, FW_FEATURE_TX_WAKE))
90 request |= POWER_TX_WAKE;
91
92 rtw_write8(rtwdev, rtwdev->hci.rpwm_addr, request);
93
94 /* Check firmware get the power requset and ack via cpwm register */
95 ret = read_poll_timeout_atomic(rtw_read8, polling,
96 (polling ^ confirm) & BIT_RPWM_TOGGLE,
97 100, 15000, true, rtwdev,
98 rtwdev->hci.cpwm_addr);
99 if (ret) {
100 /* Hit here means that driver failed to get an ack from firmware.
101 * The reason could be that hardware is locked at Deep sleep,
102 * so most of the hardware circuits are not working, even
103 * register read/write; or firmware is locked in some state and
104 * cannot get the request. It should be treated as fatal error
105 * and requires an entire analysis about the firmware/hardware.
106 */
107 WARN(1, "firmware failed to ack driver for %s Deep Power mode\n",
108 enter ? "entering" : "leaving");
109 }
110 }
111 EXPORT_SYMBOL(rtw_power_mode_change);
112
__rtw_leave_lps_deep(struct rtw_dev * rtwdev)113 static void __rtw_leave_lps_deep(struct rtw_dev *rtwdev)
114 {
115 rtw_hci_deep_ps(rtwdev, false);
116 }
117
__rtw_fw_leave_lps_check_reg(struct rtw_dev * rtwdev)118 static int __rtw_fw_leave_lps_check_reg(struct rtw_dev *rtwdev)
119 {
120 int i;
121
122 /* Driver needs to wait for firmware to leave LPS state
123 * successfully. Firmware will send null packet to inform AP,
124 * and see if AP sends an ACK back, then firmware will restore
125 * the REG_TCR register.
126 *
127 * If driver does not wait for firmware, null packet with
128 * PS bit could be sent due to incorrect REG_TCR setting.
129 *
130 * In our test, 100ms should be enough for firmware to finish
131 * the flow. If REG_TCR Register is still incorrect after 100ms,
132 * just modify it directly, and throw a warn message.
133 */
134 for (i = 0 ; i < LEAVE_LPS_TRY_CNT; i++) {
135 if (rtw_read32_mask(rtwdev, REG_TCR, BIT_PWRMGT_HWDATA_EN) == 0)
136 return 0;
137 msleep(20);
138 }
139
140 return -EBUSY;
141 }
142
__rtw_fw_leave_lps_check_c2h(struct rtw_dev * rtwdev)143 static int __rtw_fw_leave_lps_check_c2h(struct rtw_dev *rtwdev)
144 {
145 if (wait_for_completion_timeout(&rtwdev->lps_leave_check,
146 LEAVE_LPS_TIMEOUT))
147 return 0;
148 return -EBUSY;
149 }
150
rtw_fw_leave_lps_check(struct rtw_dev * rtwdev)151 static void rtw_fw_leave_lps_check(struct rtw_dev *rtwdev)
152 {
153 bool ret = false;
154 struct rtw_fw_state *fw;
155
156 if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags))
157 fw = &rtwdev->wow_fw;
158 else
159 fw = &rtwdev->fw;
160
161 if (rtw_fw_feature_check(fw, FW_FEATURE_LPS_C2H))
162 ret = __rtw_fw_leave_lps_check_c2h(rtwdev);
163 else
164 ret = __rtw_fw_leave_lps_check_reg(rtwdev);
165
166 if (ret) {
167 rtw_write32_clr(rtwdev, REG_TCR, BIT_PWRMGT_HWDATA_EN);
168 rtw_warn(rtwdev, "firmware failed to leave lps state\n");
169 }
170 }
171
rtw_fw_leave_lps_check_prepare(struct rtw_dev * rtwdev)172 static void rtw_fw_leave_lps_check_prepare(struct rtw_dev *rtwdev)
173 {
174 struct rtw_fw_state *fw;
175
176 if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags))
177 fw = &rtwdev->wow_fw;
178 else
179 fw = &rtwdev->fw;
180
181 if (rtw_fw_feature_check(fw, FW_FEATURE_LPS_C2H))
182 reinit_completion(&rtwdev->lps_leave_check);
183 }
184
rtw_leave_lps_core(struct rtw_dev * rtwdev)185 static void rtw_leave_lps_core(struct rtw_dev *rtwdev)
186 {
187 struct rtw_lps_conf *conf = &rtwdev->lps_conf;
188
189 conf->state = RTW_ALL_ON;
190 conf->awake_interval = 1;
191 conf->rlbm = 0;
192 conf->smart_ps = 0;
193
194 rtw_hci_link_ps(rtwdev, false);
195 rtw_fw_leave_lps_check_prepare(rtwdev);
196 rtw_fw_set_pwr_mode(rtwdev);
197 rtw_fw_leave_lps_check(rtwdev);
198
199 clear_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags);
200
201 rtw_coex_lps_notify(rtwdev, COEX_LPS_DISABLE);
202 }
203
rtw_get_lps_deep_mode(struct rtw_dev * rtwdev)204 enum rtw_lps_deep_mode rtw_get_lps_deep_mode(struct rtw_dev *rtwdev)
205 {
206 if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags))
207 return rtwdev->lps_conf.wow_deep_mode;
208 else
209 return rtwdev->lps_conf.deep_mode;
210 }
211
__rtw_enter_lps_deep(struct rtw_dev * rtwdev)212 static void __rtw_enter_lps_deep(struct rtw_dev *rtwdev)
213 {
214 if (rtw_get_lps_deep_mode(rtwdev) == LPS_DEEP_MODE_NONE)
215 return;
216
217 if (!test_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags)) {
218 rtw_dbg(rtwdev, RTW_DBG_PS,
219 "Should enter LPS before entering deep PS\n");
220 return;
221 }
222
223 if (rtw_get_lps_deep_mode(rtwdev) == LPS_DEEP_MODE_PG)
224 rtw_fw_set_pg_info(rtwdev);
225
226 rtw_hci_deep_ps(rtwdev, true);
227 }
228
rtw_enter_lps_core(struct rtw_dev * rtwdev)229 static void rtw_enter_lps_core(struct rtw_dev *rtwdev)
230 {
231 struct rtw_lps_conf *conf = &rtwdev->lps_conf;
232
233 conf->state = RTW_RF_OFF;
234 conf->awake_interval = 1;
235 conf->rlbm = 1;
236 conf->smart_ps = 2;
237
238 rtw_coex_lps_notify(rtwdev, COEX_LPS_ENABLE);
239
240 rtw_fw_set_pwr_mode(rtwdev);
241 rtw_hci_link_ps(rtwdev, true);
242
243 set_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags);
244 }
245
__rtw_enter_lps(struct rtw_dev * rtwdev,u8 port_id)246 static void __rtw_enter_lps(struct rtw_dev *rtwdev, u8 port_id)
247 {
248 struct rtw_lps_conf *conf = &rtwdev->lps_conf;
249
250 if (test_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags))
251 return;
252
253 conf->mode = RTW_MODE_LPS;
254 conf->port_id = port_id;
255
256 rtw_enter_lps_core(rtwdev);
257 }
258
__rtw_leave_lps(struct rtw_dev * rtwdev)259 static void __rtw_leave_lps(struct rtw_dev *rtwdev)
260 {
261 struct rtw_lps_conf *conf = &rtwdev->lps_conf;
262
263 if (test_and_clear_bit(RTW_FLAG_LEISURE_PS_DEEP, rtwdev->flags)) {
264 rtw_dbg(rtwdev, RTW_DBG_PS,
265 "Should leave deep PS before leaving LPS\n");
266 __rtw_leave_lps_deep(rtwdev);
267 }
268
269 if (!test_bit(RTW_FLAG_LEISURE_PS, rtwdev->flags))
270 return;
271
272 conf->mode = RTW_MODE_ACTIVE;
273
274 rtw_leave_lps_core(rtwdev);
275 }
276
rtw_enter_lps(struct rtw_dev * rtwdev,u8 port_id)277 void rtw_enter_lps(struct rtw_dev *rtwdev, u8 port_id)
278 {
279 lockdep_assert_held(&rtwdev->mutex);
280
281 if (rtwdev->coex.stat.wl_force_lps_ctrl)
282 return;
283
284 __rtw_enter_lps(rtwdev, port_id);
285 __rtw_enter_lps_deep(rtwdev);
286 }
287
rtw_leave_lps(struct rtw_dev * rtwdev)288 void rtw_leave_lps(struct rtw_dev *rtwdev)
289 {
290 lockdep_assert_held(&rtwdev->mutex);
291
292 __rtw_leave_lps_deep(rtwdev);
293 __rtw_leave_lps(rtwdev);
294 }
295
rtw_leave_lps_deep(struct rtw_dev * rtwdev)296 void rtw_leave_lps_deep(struct rtw_dev *rtwdev)
297 {
298 lockdep_assert_held(&rtwdev->mutex);
299
300 __rtw_leave_lps_deep(rtwdev);
301 }
302
