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