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 13static 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 37static 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 48static 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 */ 84static 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 122static 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 134static 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 213static 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 225static 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 235static 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 245static 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 260static 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 268static 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 279static void rtw_wow_rx_dma_start(struct rtw_dev *rtwdev) 280{ 281 rtw_write32_clr(rtwdev, REG_RXPKT_NUM, BIT_RW_RELEASE); 282} 283 284static int rtw_wow_check_fw_status(struct rtw_dev *rtwdev, bool wow_enable) 285{ 286 int ret; 287 u8 check; 288 u32 check_dis; 289 290 if (wow_enable) { 291 ret = read_poll_timeout(rtw_read8, check, !check, 1000, 292 100000, true, rtwdev, 293 REG_WOWLAN_WAKE_REASON); 294 if (ret) 295 goto wow_fail; 296 } else { 297 ret = read_poll_timeout(rtw_read32_mask, check_dis, 298 !check_dis, 1000, 100000, true, rtwdev, 299 REG_FE1IMR, BIT_FS_RXDONE); 300 if (ret) 301 goto wow_fail; 302 ret = read_poll_timeout(rtw_read32_mask, check_dis, 303 !check_dis, 1000, 100000, false, rtwdev, 304 REG_RXPKT_NUM, BIT_RW_RELEASE); 305 if (ret) 306 goto wow_fail; 307 } 308 309 return 0; 310 311wow_fail: 312 rtw_err(rtwdev, "failed to check wow status %s\n", 313 wow_enable ? "enabled" : "disabled"); 314 return -EBUSY; 315} 316 317static void rtw_wow_fw_security_type_iter(struct ieee80211_hw *hw, 318 struct ieee80211_vif *vif, 319 struct ieee80211_sta *sta, 320 struct ieee80211_key_conf *key, 321 void *data) 322{ 323 struct rtw_fw_key_type_iter_data *iter_data = data; 324 struct rtw_dev *rtwdev = hw->priv; 325 u8 hw_key_type; 326 327 if (vif != rtwdev->wow.wow_vif) 328 return; 329 330 switch (key->cipher) { 331 case WLAN_CIPHER_SUITE_WEP40: 332 hw_key_type = RTW_CAM_WEP40; 333 break; 334 case WLAN_CIPHER_SUITE_WEP104: 335 hw_key_type = RTW_CAM_WEP104; 336 break; 337 case WLAN_CIPHER_SUITE_TKIP: 338 hw_key_type = RTW_CAM_TKIP; 339 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; 340 break; 341 case WLAN_CIPHER_SUITE_CCMP: 342 hw_key_type = RTW_CAM_AES; 343 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX; 344 break; 345 default: 346 rtw_err(rtwdev, "Unsupported key type for wowlan mode\n"); 347 hw_key_type = 0; 348 break; 349 } 350 351 if (sta) 352 iter_data->pairwise_key_type = hw_key_type; 353 else 354 iter_data->group_key_type = hw_key_type; 355} 356 357static void rtw_wow_fw_security_type(struct rtw_dev *rtwdev) 358{ 359 struct rtw_fw_key_type_iter_data data = {}; 360 struct ieee80211_vif *wow_vif = rtwdev->wow.wow_vif; 361 362 data.rtwdev = rtwdev; 363 rtw_iterate_keys(rtwdev, wow_vif, 364 rtw_wow_fw_security_type_iter, &data); 365 rtw_fw_set_aoac_global_info_cmd(rtwdev, data.pairwise_key_type, 366 data.group_key_type); 367} 368 369static int rtw_wow_fw_start(struct rtw_dev *rtwdev) 370{ 371 if (rtw_wow_mgd_linked(rtwdev)) { 372 rtw_send_rsvd_page_h2c(rtwdev); 373 rtw_wow_pattern_write(rtwdev); 374 rtw_wow_fw_security_type(rtwdev); 375 rtw_fw_set_disconnect_decision_cmd(rtwdev, true); 376 rtw_fw_set_keep_alive_cmd(rtwdev, true); 377 } else if (rtw_wow_no_link(rtwdev)) { 378 rtw_fw_set_nlo_info(rtwdev, true); 379 rtw_fw_update_pkt_probe_req(rtwdev, NULL); 380 rtw_fw_channel_switch(rtwdev, true); 381 } 382 383 rtw_fw_set_wowlan_ctrl_cmd(rtwdev, true); 384 rtw_fw_set_remote_wake_ctrl_cmd(rtwdev, true); 385 386 return rtw_wow_check_fw_status(rtwdev, true); 387} 388 389static int rtw_wow_fw_stop(struct rtw_dev *rtwdev) 390{ 391 if (rtw_wow_mgd_linked(rtwdev)) { 392 rtw_fw_set_disconnect_decision_cmd(rtwdev, false); 393 rtw_fw_set_keep_alive_cmd(rtwdev, false); 394 rtw_wow_pattern_clear(rtwdev); 395 } else if (rtw_wow_no_link(rtwdev)) { 396 rtw_fw_channel_switch(rtwdev, false); 397 rtw_fw_set_nlo_info(rtwdev, false); 398 } 399 400 rtw_fw_set_wowlan_ctrl_cmd(rtwdev, false); 401 rtw_fw_set_remote_wake_ctrl_cmd(rtwdev, false); 402 403 return rtw_wow_check_fw_status(rtwdev, false); 404} 405 406static void rtw_wow_avoid_reset_mac(struct rtw_dev *rtwdev) 407{ 408 /* When resuming from wowlan mode, some hosts issue signal 409 * (PCIE: PREST, USB: SE0RST) to device, and lead to reset 410 * mac core. If it happens, the connection to AP will be lost. 411 * Setting REG_RSV_CTRL Register can avoid this process. 412 */ 413 switch (rtw_hci_type(rtwdev)) { 414 case RTW_HCI_TYPE_PCIE: 415 case RTW_HCI_TYPE_USB: 416 rtw_write8(rtwdev, REG_RSV_CTRL, BIT_WLOCK_1C_B6); 417 rtw_write8(rtwdev, REG_RSV_CTRL, 418 BIT_WLOCK_1C_B6 | BIT_R_DIS_PRST); 419 break; 420 default: 421 rtw_warn(rtwdev, "Unsupported hci type to disable reset MAC\n"); 422 break; 423 } 424} 425 426static void rtw_wow_fw_media_status_iter(void *data, struct ieee80211_sta *sta) 427{ 428 struct rtw_sta_info *si = (struct rtw_sta_info *)sta->drv_priv; 429 struct rtw_fw_media_status_iter_data *iter_data = data; 430 struct rtw_dev *rtwdev = iter_data->rtwdev; 431 432 rtw_fw_media_status_report(rtwdev, si->mac_id, iter_data->connect); 433} 434 435static void rtw_wow_fw_media_status(struct rtw_dev *rtwdev, bool connect) 436{ 437 struct rtw_fw_media_status_iter_data data; 438 439 data.rtwdev = rtwdev; 440 data.connect = connect; 441 442 rtw_iterate_stas_atomic(rtwdev, rtw_wow_fw_media_status_iter, &data); 443} 444 445static void rtw_wow_config_pno_rsvd_page(struct rtw_dev *rtwdev, 446 struct rtw_vif *rtwvif) 447{ 448 rtw_add_rsvd_page_pno(rtwdev, rtwvif); 449} 450 451static void rtw_wow_config_linked_rsvd_page(struct rtw_dev *rtwdev, 452 struct rtw_vif *rtwvif) 453{ 454 rtw_add_rsvd_page_sta(rtwdev, rtwvif); 455} 456 457static void rtw_wow_config_rsvd_page(struct rtw_dev *rtwdev, 458 struct rtw_vif *rtwvif) 459{ 460 rtw_remove_rsvd_page(rtwdev, rtwvif); 461 462 if (rtw_wow_mgd_linked(rtwdev)) { 463 rtw_wow_config_linked_rsvd_page(rtwdev, rtwvif); 464 } else if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags) && 465 rtw_wow_no_link(rtwdev)) { 466 rtw_wow_config_pno_rsvd_page(rtwdev, rtwvif); 467 } 468} 469 470static int rtw_wow_dl_fw_rsvd_page(struct rtw_dev *rtwdev) 471{ 472 struct ieee80211_vif *wow_vif = rtwdev->wow.wow_vif; 473 struct rtw_vif *rtwvif = (struct rtw_vif *)wow_vif->drv_priv; 474 475 rtw_wow_config_rsvd_page(rtwdev, rtwvif); 476 477 return rtw_fw_download_rsvd_page(rtwdev); 478} 479 480static int rtw_wow_swap_fw(struct rtw_dev *rtwdev, enum rtw_fw_type type) 481{ 482 struct rtw_fw_state *fw; 483 int ret; 484 485 switch (type) { 486 case RTW_WOWLAN_FW: 487 fw = &rtwdev->wow_fw; 488 break; 489 490 case RTW_NORMAL_FW: 491 fw = &rtwdev->fw; 492 break; 493 494 default: 495 rtw_warn(rtwdev, "unsupported firmware type to swap\n"); 496 return -ENOENT; 497 } 498 499 ret = rtw_download_firmware(rtwdev, fw); 500 if (ret) 501 goto out; 502 503 rtw_fw_send_general_info(rtwdev); 504 rtw_fw_send_phydm_info(rtwdev); 505 rtw_wow_fw_media_status(rtwdev, true); 506 507out: 508 return ret; 509} 510 511static void rtw_wow_check_pno(struct rtw_dev *rtwdev, 512 struct cfg80211_sched_scan_request *nd_config) 513{ 514 struct rtw_wow_param *rtw_wow = &rtwdev->wow; 515 struct rtw_pno_request *pno_req = &rtw_wow->pno_req; 516 struct ieee80211_channel *channel; 517 int i, size; 518 519 if (!nd_config->n_match_sets || !nd_config->n_channels) 520 goto err; 521 522 pno_req->match_set_cnt = nd_config->n_match_sets; 523 size = sizeof(*pno_req->match_sets) * pno_req->match_set_cnt; 524 pno_req->match_sets = kmemdup(nd_config->match_sets, size, GFP_KERNEL); 525 if (!pno_req->match_sets) 526 goto err; 527 528 pno_req->channel_cnt = nd_config->n_channels; 529 size = sizeof(*nd_config->channels[0]) * nd_config->n_channels; 530 pno_req->channels = kmalloc(size, GFP_KERNEL); 531 if (!pno_req->channels) 532 goto channel_err; 533 534 for (i = 0 ; i < pno_req->channel_cnt; i++) { 535 channel = pno_req->channels + i; 536 memcpy(channel, nd_config->channels[i], sizeof(*channel)); 537 } 538 539 pno_req->scan_plan = *nd_config->scan_plans; 540 pno_req->inited = true; 541 542 rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: net-detect is enabled\n"); 543 544 return; 545 546channel_err: 547 kfree(pno_req->match_sets); 548 549err: 550 rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: net-detect is disabled\n"); 551} 552 553static int rtw_wow_leave_linked_ps(struct rtw_dev *rtwdev) 554{ 555 if (!test_bit(RTW_FLAG_WOWLAN, rtwdev->flags)) 556 cancel_delayed_work_sync(&rtwdev->watch_dog_work); 557 558 rtw_leave_lps(rtwdev); 559 560 return 0; 561} 562 563static int rtw_wow_leave_no_link_ps(struct rtw_dev *rtwdev) 564{ 565 struct rtw_wow_param *rtw_wow = &rtwdev->wow; 566 int ret = 0; 567 568 if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags)) { 569 if (rtw_fw_lps_deep_mode) 570 rtw_leave_lps_deep(rtwdev); 571 } else { 572 if (test_bit(RTW_FLAG_INACTIVE_PS, rtwdev->flags)) { 573 rtw_wow->ips_enabled = true; 574 ret = rtw_leave_ips(rtwdev); 575 if (ret) 576 return ret; 577 } 578 } 579 580 return 0; 581} 582 583static int rtw_wow_leave_ps(struct rtw_dev *rtwdev) 584{ 585 int ret = 0; 586 587 if (rtw_wow_mgd_linked(rtwdev)) 588 ret = rtw_wow_leave_linked_ps(rtwdev); 589 else if (rtw_wow_no_link(rtwdev)) 590 ret = rtw_wow_leave_no_link_ps(rtwdev); 591 592 return ret; 593} 594 595static int rtw_wow_restore_ps(struct rtw_dev *rtwdev) 596{ 597 int ret = 0; 598 599 if (rtw_wow_no_link(rtwdev) && rtwdev->wow.ips_enabled) 600 ret = rtw_enter_ips(rtwdev); 601 602 return ret; 603} 604 605static int rtw_wow_enter_linked_ps(struct rtw_dev *rtwdev) 606{ 607 struct rtw_wow_param *rtw_wow = &rtwdev->wow; 608 struct ieee80211_vif *wow_vif = rtw_wow->wow_vif; 609 struct rtw_vif *rtwvif = (struct rtw_vif *)wow_vif->drv_priv; 610 611 rtw_enter_lps(rtwdev, rtwvif->port); 612 613 return 0; 614} 615 616static int rtw_wow_enter_no_link_ps(struct rtw_dev *rtwdev) 617{ 618 /* firmware enters deep ps by itself if supported */ 619 set_bit(RTW_FLAG_LEISURE_PS_DEEP, rtwdev->flags); 620 621 return 0; 622} 623 624static int rtw_wow_enter_ps(struct rtw_dev *rtwdev) 625{ 626 int ret = 0; 627 628 if (rtw_wow_mgd_linked(rtwdev)) 629 ret = rtw_wow_enter_linked_ps(rtwdev); 630 else if (rtw_wow_no_link(rtwdev) && rtw_fw_lps_deep_mode) 631 ret = rtw_wow_enter_no_link_ps(rtwdev); 632 633 return ret; 634} 635 636static void rtw_wow_stop_trx(struct rtw_dev *rtwdev) 637{ 638 rtw_wow_bb_stop(rtwdev); 639 rtw_wow_rx_dma_stop(rtwdev); 640} 641 642static int rtw_wow_start(struct rtw_dev *rtwdev) 643{ 644 int ret; 645 646 ret = rtw_wow_fw_start(rtwdev); 647 if (ret) 648 goto out; 649 650 rtw_hci_stop(rtwdev); 651 rtw_wow_bb_start(rtwdev); 652 rtw_wow_avoid_reset_mac(rtwdev); 653 654out: 655 return ret; 656} 657 658static int rtw_wow_enable(struct rtw_dev *rtwdev) 659{ 660 int ret = 0; 661 662 rtw_wow_stop_trx(rtwdev); 663 664 ret = rtw_wow_swap_fw(rtwdev, RTW_WOWLAN_FW); 665 if (ret) { 666 rtw_err(rtwdev, "failed to swap wow fw\n"); 667 goto error; 668 } 669 670 set_bit(RTW_FLAG_WOWLAN, rtwdev->flags); 671 672 ret = rtw_wow_dl_fw_rsvd_page(rtwdev); 673 if (ret) { 674 rtw_err(rtwdev, "failed to download wowlan rsvd page\n"); 675 goto error; 676 } 677 678 ret = rtw_wow_start(rtwdev); 679 if (ret) { 680 rtw_err(rtwdev, "failed to start wow\n"); 681 goto error; 682 } 683 684 return ret; 685 686error: 687 clear_bit(RTW_FLAG_WOWLAN, rtwdev->flags); 688 return ret; 689} 690 691static int rtw_wow_stop(struct rtw_dev *rtwdev) 692{ 693 int ret; 694 695 /* some HCI related registers will be reset after resume, 696 * need to set them again. 697 */ 698 ret = rtw_hci_setup(rtwdev); 699 if (ret) { 700 rtw_err(rtwdev, "failed to setup hci\n"); 701 return ret; 702 } 703 704 ret = rtw_hci_start(rtwdev); 705 if (ret) { 706 rtw_err(rtwdev, "failed to start hci\n"); 707 return ret; 708 } 709 710 ret = rtw_wow_fw_stop(rtwdev); 711 if (ret) 712 rtw_err(rtwdev, "failed to stop wowlan fw\n"); 713 714 rtw_wow_bb_stop(rtwdev); 715 716 return ret; 717} 718 719static void rtw_wow_resume_trx(struct rtw_dev *rtwdev) 720{ 721 rtw_wow_rx_dma_start(rtwdev); 722 rtw_wow_bb_start(rtwdev); 723 ieee80211_queue_delayed_work(rtwdev->hw, &rtwdev->watch_dog_work, 724 RTW_WATCH_DOG_DELAY_TIME); 725} 726 727static int rtw_wow_disable(struct rtw_dev *rtwdev) 728{ 729 int ret; 730 731 clear_bit(RTW_FLAG_WOWLAN, rtwdev->flags); 732 733 ret = rtw_wow_stop(rtwdev); 734 if (ret) { 735 rtw_err(rtwdev, "failed to stop wow\n"); 736 goto out; 737 } 738 739 ret = rtw_wow_swap_fw(rtwdev, RTW_NORMAL_FW); 740 if (ret) { 741 rtw_err(rtwdev, "failed to swap normal fw\n"); 742 goto out; 743 } 744 745 ret = rtw_wow_dl_fw_rsvd_page(rtwdev); 746 if (ret) 747 rtw_err(rtwdev, "failed to download normal rsvd page\n"); 748 749out: 750 rtw_wow_resume_trx(rtwdev); 751 return ret; 752} 753 754static void rtw_wow_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) 755{ 756 struct rtw_dev *rtwdev = data; 757 struct rtw_vif *rtwvif = (struct rtw_vif *)vif->drv_priv; 758 struct rtw_wow_param *rtw_wow = &rtwdev->wow; 759 760 /* Current wowlan function support setting of only one STATION vif. 761 * So when one suitable vif is found, stop the iteration. 762 */ 763 if (rtw_wow->wow_vif || vif->type != NL80211_IFTYPE_STATION) 764 return; 765 766 switch (rtwvif->net_type) { 767 case RTW_NET_MGD_LINKED: 768 rtw_wow->wow_vif = vif; 769 break; 770 case RTW_NET_NO_LINK: 771 if (rtw_wow->pno_req.inited) 772 rtwdev->wow.wow_vif = vif; 773 break; 774 default: 775 break; 776 } 777} 778 779static int rtw_wow_set_wakeups(struct rtw_dev *rtwdev, 780 struct cfg80211_wowlan *wowlan) 781{ 782 struct rtw_wow_param *rtw_wow = &rtwdev->wow; 783 struct rtw_wow_pattern *rtw_patterns = rtw_wow->patterns; 784 struct rtw_vif *rtwvif; 785 int i; 786 787 if (wowlan->disconnect) 788 set_bit(RTW_WOW_FLAG_EN_DISCONNECT, rtw_wow->flags); 789 if (wowlan->magic_pkt) 790 set_bit(RTW_WOW_FLAG_EN_MAGIC_PKT, rtw_wow->flags); 791 if (wowlan->gtk_rekey_failure) 792 set_bit(RTW_WOW_FLAG_EN_REKEY_PKT, rtw_wow->flags); 793 794 if (wowlan->nd_config) 795 rtw_wow_check_pno(rtwdev, wowlan->nd_config); 796 797 rtw_iterate_vifs_atomic(rtwdev, rtw_wow_vif_iter, rtwdev); 798 if (!rtw_wow->wow_vif) 799 return -EPERM; 800 801 rtwvif = (struct rtw_vif *)rtw_wow->wow_vif->drv_priv; 802 if (wowlan->n_patterns && wowlan->patterns) { 803 rtw_wow->pattern_cnt = wowlan->n_patterns; 804 for (i = 0; i < wowlan->n_patterns; i++) 805 rtw_wow_pattern_generate(rtwdev, rtwvif, 806 wowlan->patterns + i, 807 rtw_patterns + i); 808 } 809 810 return 0; 811} 812 813static void rtw_wow_clear_wakeups(struct rtw_dev *rtwdev) 814{ 815 struct rtw_wow_param *rtw_wow = &rtwdev->wow; 816 struct rtw_pno_request *pno_req = &rtw_wow->pno_req; 817 818 if (pno_req->inited) { 819 kfree(pno_req->channels); 820 kfree(pno_req->match_sets); 821 } 822 823 memset(rtw_wow, 0, sizeof(rtwdev->wow)); 824} 825 826int rtw_wow_suspend(struct rtw_dev *rtwdev, struct cfg80211_wowlan *wowlan) 827{ 828 int ret = 0; 829 830 ret = rtw_wow_set_wakeups(rtwdev, wowlan); 831 if (ret) { 832 rtw_err(rtwdev, "failed to set wakeup event\n"); 833 goto out; 834 } 835 836 ret = rtw_wow_leave_ps(rtwdev); 837 if (ret) { 838 rtw_err(rtwdev, "failed to leave ps from normal mode\n"); 839 goto out; 840 } 841 842 ret = rtw_wow_enable(rtwdev); 843 if (ret) { 844 rtw_err(rtwdev, "failed to enable wow\n"); 845 rtw_wow_restore_ps(rtwdev); 846 goto out; 847 } 848 849 ret = rtw_wow_enter_ps(rtwdev); 850 if (ret) 851 rtw_err(rtwdev, "failed to enter ps for wow\n"); 852 853out: 854 return ret; 855} 856 857int rtw_wow_resume(struct rtw_dev *rtwdev) 858{ 859 int ret; 860 861 /* If wowlan mode is not enabled, do nothing */ 862 if (!test_bit(RTW_FLAG_WOWLAN, rtwdev->flags)) { 863 rtw_err(rtwdev, "wow is not enabled\n"); 864 ret = -EPERM; 865 goto out; 866 } 867 868 ret = rtw_wow_leave_ps(rtwdev); 869 if (ret) { 870 rtw_err(rtwdev, "failed to leave ps from wowlan mode\n"); 871 goto out; 872 } 873 874 rtw_wow_show_wakeup_reason(rtwdev); 875 876 ret = rtw_wow_disable(rtwdev); 877 if (ret) { 878 rtw_err(rtwdev, "failed to disable wow\n"); 879 goto out; 880 } 881 882 ret = rtw_wow_restore_ps(rtwdev); 883 if (ret) 884 rtw_err(rtwdev, "failed to restore ps to normal mode\n"); 885 886out: 887 rtw_wow_clear_wakeups(rtwdev); 888 return ret; 889} 890