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