diff options
Diffstat (limited to 'drivers/net/wireless/realtek/rtw88/wow.c')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw88/wow.c | 890 |
1 files changed, 890 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/wow.c b/drivers/net/wireless/realtek/rtw88/wow.c new file mode 100644 index 000000000000..af5c27e1bb07 --- /dev/null +++ b/drivers/net/wireless/realtek/rtw88/wow.c @@ -0,0 +1,890 @@ +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause +/* Copyright(c) 2018-2019 Realtek Corporation + */ + +#include "main.h" +#include "fw.h" +#include "wow.h" +#include "reg.h" +#include "debug.h" +#include "mac.h" +#include "ps.h" + +static void rtw_wow_show_wakeup_reason(struct rtw_dev *rtwdev) +{ + u8 reason; + + reason = rtw_read8(rtwdev, REG_WOWLAN_WAKE_REASON); + + if (reason == RTW_WOW_RSN_RX_DEAUTH) + rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: Rx deauth\n"); + else if (reason == RTW_WOW_RSN_DISCONNECT) + rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: AP is off\n"); + else if (reason == RTW_WOW_RSN_RX_MAGIC_PKT) + rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: Rx magic packet\n"); + else if (reason == RTW_WOW_RSN_RX_GTK_REKEY) + rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: Rx gtk rekey\n"); + else if (reason == RTW_WOW_RSN_RX_PTK_REKEY) + rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: Rx ptk rekey\n"); + else if (reason == RTW_WOW_RSN_RX_PATTERN_MATCH) + rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: Rx pattern match packet\n"); + else if (reason == RTW_WOW_RSN_RX_NLO) + rtw_dbg(rtwdev, RTW_DBG_WOW, "Rx NLO\n"); + else + rtw_warn(rtwdev, "Unknown wakeup reason %x\n", reason); +} + +static void rtw_wow_pattern_write_cam(struct rtw_dev *rtwdev, u8 addr, + u32 wdata) +{ + rtw_write32(rtwdev, REG_WKFMCAM_RWD, wdata); + rtw_write32(rtwdev, REG_WKFMCAM_CMD, BIT_WKFCAM_POLLING_V1 | + BIT_WKFCAM_WE | BIT_WKFCAM_ADDR_V2(addr)); + + if (!check_hw_ready(rtwdev, REG_WKFMCAM_CMD, BIT_WKFCAM_POLLING_V1, 0)) + rtw_err(rtwdev, "failed to write pattern cam\n"); +} + +static void rtw_wow_pattern_write_cam_ent(struct rtw_dev *rtwdev, u8 id, + struct rtw_wow_pattern *rtw_pattern) +{ + int i; + u8 addr; + u32 wdata; + + for (i = 0; i < RTW_MAX_PATTERN_MASK_SIZE / 4; i++) { + addr = (id << 3) + i; + wdata = rtw_pattern->mask[i * 4]; + wdata |= rtw_pattern->mask[i * 4 + 1] << 8; + wdata |= rtw_pattern->mask[i * 4 + 2] << 16; + wdata |= rtw_pattern->mask[i * 4 + 3] << 24; + rtw_wow_pattern_write_cam(rtwdev, addr, wdata); + } + + wdata = rtw_pattern->crc; + addr = (id << 3) + RTW_MAX_PATTERN_MASK_SIZE / 4; + + switch (rtw_pattern->type) { + case RTW_PATTERN_BROADCAST: + wdata |= BIT_WKFMCAM_BC | BIT_WKFMCAM_VALID; + break; + case RTW_PATTERN_MULTICAST: + wdata |= BIT_WKFMCAM_MC | BIT_WKFMCAM_VALID; + break; + case RTW_PATTERN_UNICAST: + wdata |= BIT_WKFMCAM_UC | BIT_WKFMCAM_VALID; + break; + default: + break; + } + rtw_wow_pattern_write_cam(rtwdev, addr, wdata); +} + +/* RTK internal CRC16 for Pattern Cam */ +static u16 __rtw_cal_crc16(u8 data, u16 crc) +{ + u8 shift_in, data_bit; + u8 crc_bit4, crc_bit11, crc_bit15; + u16 crc_result; + int index; + + for (index = 0; index < 8; index++) { + crc_bit15 = ((crc & BIT(15)) ? 1 : 0); + data_bit = (data & (BIT(0) << index) ? 1 : 0); + shift_in = crc_bit15 ^ data_bit; + + crc_result = crc << 1; + + if (shift_in == 0) + crc_result &= (~BIT(0)); + else + crc_result |= BIT(0); + + crc_bit11 = ((crc & BIT(11)) ? 1 : 0) ^ shift_in; + + if (crc_bit11 == 0) + crc_result &= (~BIT(12)); + else + crc_result |= BIT(12); + + crc_bit4 = ((crc & BIT(4)) ? 1 : 0) ^ shift_in; + + if (crc_bit4 == 0) + crc_result &= (~BIT(5)); + else + crc_result |= BIT(5); + + crc = crc_result; + } + return crc; +} + +static u16 rtw_calc_crc(u8 *pdata, int length) +{ + u16 crc = 0xffff; + int i; + + for (i = 0; i < length; i++) + crc = __rtw_cal_crc16(pdata[i], crc); + + /* get 1' complement */ + return ~crc; +} + +static void rtw_wow_pattern_generate(struct rtw_dev *rtwdev, + struct rtw_vif *rtwvif, + const struct cfg80211_pkt_pattern *pkt_pattern, + struct rtw_wow_pattern *rtw_pattern) +{ + const u8 *mask; + const u8 *pattern; + u8 mask_hw[RTW_MAX_PATTERN_MASK_SIZE] = {0}; + u8 content[RTW_MAX_PATTERN_SIZE] = {0}; + u8 mac_addr[ETH_ALEN] = {0}; + u8 mask_len; + u16 count; + int len; + int i; + + pattern = pkt_pattern->pattern; + len = pkt_pattern->pattern_len; + mask = pkt_pattern->mask; + + ether_addr_copy(mac_addr, rtwvif->mac_addr); + memset(rtw_pattern, 0, sizeof(*rtw_pattern)); + + mask_len = DIV_ROUND_UP(len, 8); + + if (is_broadcast_ether_addr(pattern)) + rtw_pattern->type = RTW_PATTERN_BROADCAST; + else if (is_multicast_ether_addr(pattern)) + rtw_pattern->type = RTW_PATTERN_MULTICAST; + else if (ether_addr_equal(pattern, mac_addr)) + rtw_pattern->type = RTW_PATTERN_UNICAST; + else + rtw_pattern->type = RTW_PATTERN_INVALID; + + /* translate mask from os to mask for hw + * pattern from OS uses 'ethenet frame', like this: + * | 6 | 6 | 2 | 20 | Variable | 4 | + * |--------+--------+------+-----------+------------+-----| + * | 802.3 Mac Header | IP Header | TCP Packet | FCS | + * | DA | SA | Type | + * + * BUT, packet catched by our HW is in '802.11 frame', begin from LLC + * | 24 or 30 | 6 | 2 | 20 | Variable | 4 | + * |-------------------+--------+------+-----------+------------+-----| + * | 802.11 MAC Header | LLC | IP Header | TCP Packet | FCS | + * | Others | Tpye | + * + * Therefore, we need translate mask_from_OS to mask_to_hw. + * We should left-shift mask by 6 bits, then set the new bit[0~5] = 0, + * because new mask[0~5] means 'SA', but our HW packet begins from LLC, + * bit[0~5] corresponds to first 6 Bytes in LLC, they just don't match. + */ + + /* Shift 6 bits */ + for (i = 0; i < mask_len - 1; i++) { + mask_hw[i] = u8_get_bits(mask[i], GENMASK(7, 6)); + mask_hw[i] |= u8_get_bits(mask[i + 1], GENMASK(5, 0)) << 2; + } + mask_hw[i] = u8_get_bits(mask[i], GENMASK(7, 6)); + + /* Set bit 0-5 to zero */ + mask_hw[0] &= (~GENMASK(5, 0)); + + memcpy(rtw_pattern->mask, mask_hw, RTW_MAX_PATTERN_MASK_SIZE); + + /* To get the wake up pattern from the mask. + * We do not count first 12 bits which means + * DA[6] and SA[6] in the pattern to match HW design. + */ + count = 0; + for (i = 12; i < len; i++) { + if ((mask[i / 8] >> (i % 8)) & 0x01) { + content[count] = pattern[i]; + count++; + } + } + + rtw_pattern->crc = rtw_calc_crc(content, count); +} + +static void rtw_wow_pattern_clear_cam(struct rtw_dev *rtwdev) +{ + bool ret; + + rtw_write32(rtwdev, REG_WKFMCAM_CMD, BIT_WKFCAM_POLLING_V1 | + BIT_WKFCAM_CLR_V1); + + ret = check_hw_ready(rtwdev, REG_WKFMCAM_CMD, BIT_WKFCAM_POLLING_V1, 0); + if (!ret) + rtw_err(rtwdev, "failed to clean pattern cam\n"); +} + +static void rtw_wow_pattern_write(struct rtw_dev *rtwdev) +{ + struct rtw_wow_param *rtw_wow = &rtwdev->wow; + struct rtw_wow_pattern *rtw_pattern = rtw_wow->patterns; + int i = 0; + + for (i = 0; i < rtw_wow->pattern_cnt; i++) + rtw_wow_pattern_write_cam_ent(rtwdev, i, rtw_pattern + i); +} + +static void rtw_wow_pattern_clear(struct rtw_dev *rtwdev) +{ + struct rtw_wow_param *rtw_wow = &rtwdev->wow; + + rtw_wow_pattern_clear_cam(rtwdev); + + rtw_wow->pattern_cnt = 0; + memset(rtw_wow->patterns, 0, sizeof(rtw_wow->patterns)); +} + +static void rtw_wow_bb_stop(struct rtw_dev *rtwdev) +{ + struct rtw_wow_param *rtw_wow = &rtwdev->wow; + + /* wait 100ms for firmware to finish TX */ + msleep(100); + + if (!rtw_read32_mask(rtwdev, REG_BCNQ_INFO, BIT_MGQ_CPU_EMPTY)) + rtw_warn(rtwdev, "Wrong status of MGQ_CPU empty!\n"); + + rtw_wow->txpause = rtw_read8(rtwdev, REG_TXPAUSE); + rtw_write8(rtwdev, REG_TXPAUSE, 0xff); + rtw_write8_clr(rtwdev, REG_SYS_FUNC_EN, BIT_FEN_BB_RSTB); +} + +static void rtw_wow_bb_start(struct rtw_dev *rtwdev) +{ + struct rtw_wow_param *rtw_wow = &rtwdev->wow; + + rtw_write8_set(rtwdev, REG_SYS_FUNC_EN, BIT_FEN_BB_RSTB); + rtw_write8(rtwdev, REG_TXPAUSE, rtw_wow->txpause); +} + +static void rtw_wow_rx_dma_stop(struct rtw_dev *rtwdev) +{ + /* wait 100ms for HW to finish rx dma */ + msleep(100); + + rtw_write32_set(rtwdev, REG_RXPKT_NUM, BIT_RW_RELEASE); + + if (!check_hw_ready(rtwdev, REG_RXPKT_NUM, BIT_RXDMA_IDLE, 1)) + rtw_err(rtwdev, "failed to stop rx dma\n"); +} + +static void rtw_wow_rx_dma_start(struct rtw_dev *rtwdev) +{ + rtw_write32_clr(rtwdev, REG_RXPKT_NUM, BIT_RW_RELEASE); +} + +static bool rtw_wow_check_fw_status(struct rtw_dev *rtwdev, bool wow_enable) +{ + bool ret; + + /* wait 100ms for wow firmware to finish work */ + msleep(100); + + if (wow_enable) { + if (!rtw_read8(rtwdev, REG_WOWLAN_WAKE_REASON)) + ret = 0; + } else { + if (rtw_read32_mask(rtwdev, REG_FE1IMR, BIT_FS_RXDONE) == 0 && + rtw_read32_mask(rtwdev, REG_RXPKT_NUM, BIT_RW_RELEASE) == 0) + ret = 0; + } + + if (ret) + rtw_err(rtwdev, "failed to check wow status %s\n", + wow_enable ? "enabled" : "disabled"); + + return ret; +} + +static void rtw_wow_fw_security_type_iter(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_sta *sta, + struct ieee80211_key_conf *key, + void *data) +{ + struct rtw_fw_key_type_iter_data *iter_data = data; + struct rtw_dev *rtwdev = hw->priv; + u8 hw_key_type; + + if (vif != rtwdev->wow.wow_vif) + return; + + switch (key->cipher) { + case WLAN_CIPHER_SUITE_WEP40: + hw_key_type = RTW_CAM_WEP40; + break; + case WLAN_CIPHER_SUITE_WEP104: + hw_key_type = RTW_CAM_WEP104; + break; + case WLAN_CIPHER_SUITE_TKIP: + hw_key_type = RTW_CAM_TKIP; + key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; + break; + case WLAN_CIPHER_SUITE_CCMP: + hw_key_type = RTW_CAM_AES; + key->flags |= IEEE80211_KEY_FLAG_SW_MGMT_TX; + break; + default: + rtw_err(rtwdev, "Unsupported key type for wowlan mode\n"); + hw_key_type = 0; + break; + } + + if (sta) + iter_data->pairwise_key_type = hw_key_type; + else + iter_data->group_key_type = hw_key_type; +} + +static void rtw_wow_fw_security_type(struct rtw_dev *rtwdev) +{ + struct rtw_fw_key_type_iter_data data = {}; + struct ieee80211_vif *wow_vif = rtwdev->wow.wow_vif; + + data.rtwdev = rtwdev; + rtw_iterate_keys(rtwdev, wow_vif, + rtw_wow_fw_security_type_iter, &data); + rtw_fw_set_aoac_global_info_cmd(rtwdev, data.pairwise_key_type, + data.group_key_type); +} + +static int rtw_wow_fw_start(struct rtw_dev *rtwdev) +{ + if (rtw_wow_mgd_linked(rtwdev)) { + rtw_send_rsvd_page_h2c(rtwdev); + rtw_wow_pattern_write(rtwdev); + rtw_wow_fw_security_type(rtwdev); + rtw_fw_set_disconnect_decision_cmd(rtwdev, true); + rtw_fw_set_keep_alive_cmd(rtwdev, true); + } else if (rtw_wow_no_link(rtwdev)) { + rtw_fw_set_nlo_info(rtwdev, true); + rtw_fw_update_pkt_probe_req(rtwdev, NULL); + rtw_fw_channel_switch(rtwdev, true); + } + + rtw_fw_set_wowlan_ctrl_cmd(rtwdev, true); + rtw_fw_set_remote_wake_ctrl_cmd(rtwdev, true); + + return rtw_wow_check_fw_status(rtwdev, true); +} + +static int rtw_wow_fw_stop(struct rtw_dev *rtwdev) +{ + if (rtw_wow_mgd_linked(rtwdev)) { + rtw_fw_set_disconnect_decision_cmd(rtwdev, false); + rtw_fw_set_keep_alive_cmd(rtwdev, false); + rtw_wow_pattern_clear(rtwdev); + } else if (rtw_wow_no_link(rtwdev)) { + rtw_fw_channel_switch(rtwdev, false); + rtw_fw_set_nlo_info(rtwdev, false); + } + + rtw_fw_set_wowlan_ctrl_cmd(rtwdev, false); + rtw_fw_set_remote_wake_ctrl_cmd(rtwdev, false); + + return rtw_wow_check_fw_status(rtwdev, false); +} + +static void rtw_wow_avoid_reset_mac(struct rtw_dev *rtwdev) +{ + /* When resuming from wowlan mode, some hosts issue signal + * (PCIE: PREST, USB: SE0RST) to device, and lead to reset + * mac core. If it happens, the connection to AP will be lost. + * Setting REG_RSV_CTRL Register can avoid this process. + */ + switch (rtw_hci_type(rtwdev)) { + case RTW_HCI_TYPE_PCIE: + case RTW_HCI_TYPE_USB: + rtw_write8(rtwdev, REG_RSV_CTRL, BIT_WLOCK_1C_B6); + rtw_write8(rtwdev, REG_RSV_CTRL, + BIT_WLOCK_1C_B6 | BIT_R_DIS_PRST); + break; + default: + rtw_warn(rtwdev, "Unsupported hci type to disable reset MAC\n"); + break; + } +} + +static void rtw_wow_fw_media_status_iter(void *data, struct ieee80211_sta *sta) +{ + struct rtw_sta_info *si = (struct rtw_sta_info *)sta->drv_priv; + struct rtw_fw_media_status_iter_data *iter_data = data; + struct rtw_dev *rtwdev = iter_data->rtwdev; + + rtw_fw_media_status_report(rtwdev, si->mac_id, iter_data->connect); +} + +static void rtw_wow_fw_media_status(struct rtw_dev *rtwdev, bool connect) +{ + struct rtw_fw_media_status_iter_data data; + + data.rtwdev = rtwdev; + data.connect = connect; + + rtw_iterate_stas_atomic(rtwdev, rtw_wow_fw_media_status_iter, &data); +} + +static void rtw_wow_config_pno_rsvd_page(struct rtw_dev *rtwdev) +{ + struct rtw_wow_param *rtw_wow = &rtwdev->wow; + struct rtw_pno_request *rtw_pno_req = &rtw_wow->pno_req; + struct cfg80211_ssid *ssid; + int i; + + for (i = 0 ; i < rtw_pno_req->match_set_cnt; i++) { + ssid = &rtw_pno_req->match_sets[i].ssid; + rtw_add_rsvd_page_probe_req(rtwdev, ssid); + } + rtw_add_rsvd_page_probe_req(rtwdev, NULL); + rtw_add_rsvd_page(rtwdev, RSVD_NLO_INFO, false); + rtw_add_rsvd_page(rtwdev, RSVD_CH_INFO, true); +} + +static void rtw_wow_config_linked_rsvd_page(struct rtw_dev *rtwdev) +{ + rtw_add_rsvd_page(rtwdev, RSVD_PS_POLL, true); + rtw_add_rsvd_page(rtwdev, RSVD_QOS_NULL, true); + rtw_add_rsvd_page(rtwdev, RSVD_NULL, true); + rtw_add_rsvd_page(rtwdev, RSVD_LPS_PG_DPK, true); + rtw_add_rsvd_page(rtwdev, RSVD_LPS_PG_INFO, true); +} + +static void rtw_wow_config_rsvd_page(struct rtw_dev *rtwdev) +{ + rtw_reset_rsvd_page(rtwdev); + + if (rtw_wow_mgd_linked(rtwdev)) { + rtw_wow_config_linked_rsvd_page(rtwdev); + } else if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags) && + rtw_wow_no_link(rtwdev)) { + rtw_wow_config_pno_rsvd_page(rtwdev); + } +} + +static int rtw_wow_dl_fw_rsvd_page(struct rtw_dev *rtwdev) +{ + struct ieee80211_vif *wow_vif = rtwdev->wow.wow_vif; + + rtw_wow_config_rsvd_page(rtwdev); + + return rtw_fw_download_rsvd_page(rtwdev, wow_vif); +} + +static int rtw_wow_swap_fw(struct rtw_dev *rtwdev, enum rtw_fw_type type) +{ + struct rtw_fw_state *fw; + int ret; + + switch (type) { + case RTW_WOWLAN_FW: + fw = &rtwdev->wow_fw; + break; + + case RTW_NORMAL_FW: + fw = &rtwdev->fw; + break; + + default: + rtw_warn(rtwdev, "unsupported firmware type to swap\n"); + return -ENOENT; + } + + ret = rtw_download_firmware(rtwdev, fw); + if (ret) + goto out; + + rtw_fw_send_general_info(rtwdev); + rtw_fw_send_phydm_info(rtwdev); + rtw_wow_fw_media_status(rtwdev, true); + +out: + return ret; +} + +static void rtw_wow_check_pno(struct rtw_dev *rtwdev, + struct cfg80211_sched_scan_request *nd_config) +{ + struct rtw_wow_param *rtw_wow = &rtwdev->wow; + struct rtw_pno_request *pno_req = &rtw_wow->pno_req; + struct ieee80211_channel *channel; + int i, size; + + if (!nd_config->n_match_sets || !nd_config->n_channels) + goto err; + + pno_req->match_set_cnt = nd_config->n_match_sets; + size = sizeof(*pno_req->match_sets) * pno_req->match_set_cnt; + pno_req->match_sets = kmemdup(nd_config->match_sets, size, GFP_KERNEL); + if (!pno_req->match_sets) + goto err; + + pno_req->channel_cnt = nd_config->n_channels; + size = sizeof(*nd_config->channels[0]) * nd_config->n_channels; + pno_req->channels = kmalloc(size, GFP_KERNEL); + if (!pno_req->channels) + goto channel_err; + + for (i = 0 ; i < pno_req->channel_cnt; i++) { + channel = pno_req->channels + i; + memcpy(channel, nd_config->channels[i], sizeof(*channel)); + } + + pno_req->scan_plan = *nd_config->scan_plans; + pno_req->inited = true; + + rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: net-detect is enabled\n"); + + return; + +channel_err: + kfree(pno_req->match_sets); + +err: + rtw_dbg(rtwdev, RTW_DBG_WOW, "WOW: net-detect is disabled\n"); +} + +static int rtw_wow_leave_linked_ps(struct rtw_dev *rtwdev) +{ + if (!test_bit(RTW_FLAG_WOWLAN, rtwdev->flags)) + cancel_delayed_work_sync(&rtwdev->watch_dog_work); + + rtw_leave_lps(rtwdev); + + return 0; +} + +static int rtw_wow_leave_no_link_ps(struct rtw_dev *rtwdev) +{ + struct rtw_wow_param *rtw_wow = &rtwdev->wow; + int ret = 0; + + if (test_bit(RTW_FLAG_WOWLAN, rtwdev->flags)) { + if (rtw_fw_lps_deep_mode) + rtw_leave_lps_deep(rtwdev); + } else { + if (test_bit(RTW_FLAG_INACTIVE_PS, rtwdev->flags)) { + rtw_wow->ips_enabled = true; + ret = rtw_leave_ips(rtwdev); + if (ret) + return ret; + } + } + + return 0; +} + +static int rtw_wow_leave_ps(struct rtw_dev *rtwdev) +{ + int ret = 0; + + if (rtw_wow_mgd_linked(rtwdev)) + ret = rtw_wow_leave_linked_ps(rtwdev); + else if (rtw_wow_no_link(rtwdev)) + ret = rtw_wow_leave_no_link_ps(rtwdev); + + return ret; +} + +static int rtw_wow_restore_ps(struct rtw_dev *rtwdev) +{ + int ret = 0; + + if (rtw_wow_no_link(rtwdev) && rtwdev->wow.ips_enabled) + ret = rtw_enter_ips(rtwdev); + + return ret; +} + +static int rtw_wow_enter_linked_ps(struct rtw_dev *rtwdev) +{ + struct rtw_wow_param *rtw_wow = &rtwdev->wow; + struct ieee80211_vif *wow_vif = rtw_wow->wow_vif; + struct rtw_vif *rtwvif = (struct rtw_vif *)wow_vif->drv_priv; + + rtw_enter_lps(rtwdev, rtwvif->port); + + return 0; +} + +static int rtw_wow_enter_no_link_ps(struct rtw_dev *rtwdev) +{ + /* firmware enters deep ps by itself if supported */ + set_bit(RTW_FLAG_LEISURE_PS_DEEP, rtwdev->flags); + + return 0; +} + +static int rtw_wow_enter_ps(struct rtw_dev *rtwdev) +{ + int ret = 0; + + if (rtw_wow_mgd_linked(rtwdev)) + ret = rtw_wow_enter_linked_ps(rtwdev); + else if (rtw_wow_no_link(rtwdev) && rtw_fw_lps_deep_mode) + ret = rtw_wow_enter_no_link_ps(rtwdev); + + return ret; +} + +static void rtw_wow_stop_trx(struct rtw_dev *rtwdev) +{ + rtw_wow_bb_stop(rtwdev); + rtw_wow_rx_dma_stop(rtwdev); +} + +static int rtw_wow_start(struct rtw_dev *rtwdev) +{ + int ret; + + ret = rtw_wow_fw_start(rtwdev); + if (ret) + goto out; + + rtw_hci_stop(rtwdev); + rtw_wow_bb_start(rtwdev); + rtw_wow_avoid_reset_mac(rtwdev); + +out: + return ret; +} + +static int rtw_wow_enable(struct rtw_dev *rtwdev) +{ + int ret = 0; + + rtw_wow_stop_trx(rtwdev); + + ret = rtw_wow_swap_fw(rtwdev, RTW_WOWLAN_FW); + if (ret) { + rtw_err(rtwdev, "failed to swap wow fw\n"); + goto error; + } + + set_bit(RTW_FLAG_WOWLAN, rtwdev->flags); + + ret = rtw_wow_dl_fw_rsvd_page(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to download wowlan rsvd page\n"); + goto error; + } + + ret = rtw_wow_start(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to start wow\n"); + goto error; + } + + return ret; + +error: + clear_bit(RTW_FLAG_WOWLAN, rtwdev->flags); + return ret; +} + +static int rtw_wow_stop(struct rtw_dev *rtwdev) +{ + int ret; + + /* some HCI related registers will be reset after resume, + * need to set them again. + */ + ret = rtw_hci_setup(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to setup hci\n"); + return ret; + } + + ret = rtw_hci_start(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to start hci\n"); + return ret; + } + + ret = rtw_wow_fw_stop(rtwdev); + if (ret) + rtw_err(rtwdev, "failed to stop wowlan fw\n"); + + rtw_wow_bb_stop(rtwdev); + + return ret; +} + +static void rtw_wow_resume_trx(struct rtw_dev *rtwdev) +{ + rtw_wow_rx_dma_start(rtwdev); + rtw_wow_bb_start(rtwdev); + ieee80211_queue_delayed_work(rtwdev->hw, &rtwdev->watch_dog_work, + RTW_WATCH_DOG_DELAY_TIME); +} + +static int rtw_wow_disable(struct rtw_dev *rtwdev) +{ + int ret; + + clear_bit(RTW_FLAG_WOWLAN, rtwdev->flags); + + ret = rtw_wow_stop(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to stop wow\n"); + goto out; + } + + ret = rtw_wow_swap_fw(rtwdev, RTW_NORMAL_FW); + if (ret) { + rtw_err(rtwdev, "failed to swap normal fw\n"); + goto out; + } + + ret = rtw_wow_dl_fw_rsvd_page(rtwdev); + if (ret) + rtw_err(rtwdev, "failed to download normal rsvd page\n"); + +out: + rtw_wow_resume_trx(rtwdev); + return ret; +} + +static void rtw_wow_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) +{ + struct rtw_dev *rtwdev = data; + struct rtw_vif *rtwvif = (struct rtw_vif *)vif->drv_priv; + struct rtw_wow_param *rtw_wow = &rtwdev->wow; + + /* Current wowlan function support setting of only one STATION vif. + * So when one suitable vif is found, stop the iteration. + */ + if (rtw_wow->wow_vif || vif->type != NL80211_IFTYPE_STATION) + return; + + switch (rtwvif->net_type) { + case RTW_NET_MGD_LINKED: + rtw_wow->wow_vif = vif; + break; + case RTW_NET_NO_LINK: + if (rtw_wow->pno_req.inited) + rtwdev->wow.wow_vif = vif; + break; + default: + break; + } +} + +static int rtw_wow_set_wakeups(struct rtw_dev *rtwdev, + struct cfg80211_wowlan *wowlan) +{ + struct rtw_wow_param *rtw_wow = &rtwdev->wow; + struct rtw_wow_pattern *rtw_patterns = rtw_wow->patterns; + struct rtw_vif *rtwvif; + int i; + + if (wowlan->disconnect) + set_bit(RTW_WOW_FLAG_EN_DISCONNECT, rtw_wow->flags); + if (wowlan->magic_pkt) + set_bit(RTW_WOW_FLAG_EN_MAGIC_PKT, rtw_wow->flags); + if (wowlan->gtk_rekey_failure) + set_bit(RTW_WOW_FLAG_EN_REKEY_PKT, rtw_wow->flags); + + if (wowlan->nd_config) + rtw_wow_check_pno(rtwdev, wowlan->nd_config); + + rtw_iterate_vifs_atomic(rtwdev, rtw_wow_vif_iter, rtwdev); + if (!rtw_wow->wow_vif) + return -EPERM; + + rtwvif = (struct rtw_vif *)rtw_wow->wow_vif->drv_priv; + if (wowlan->n_patterns && wowlan->patterns) { + rtw_wow->pattern_cnt = wowlan->n_patterns; + for (i = 0; i < wowlan->n_patterns; i++) + rtw_wow_pattern_generate(rtwdev, rtwvif, + wowlan->patterns + i, + rtw_patterns + i); + } + + return 0; +} + +static void rtw_wow_clear_wakeups(struct rtw_dev *rtwdev) +{ + struct rtw_wow_param *rtw_wow = &rtwdev->wow; + struct rtw_pno_request *pno_req = &rtw_wow->pno_req; + + if (pno_req->inited) { + kfree(pno_req->channels); + kfree(pno_req->match_sets); + } + + memset(rtw_wow, 0, sizeof(rtwdev->wow)); +} + +int rtw_wow_suspend(struct rtw_dev *rtwdev, struct cfg80211_wowlan *wowlan) +{ + int ret = 0; + + ret = rtw_wow_set_wakeups(rtwdev, wowlan); + if (ret) { + rtw_err(rtwdev, "failed to set wakeup event\n"); + goto out; + } + + ret = rtw_wow_leave_ps(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to leave ps from normal mode\n"); + goto out; + } + + ret = rtw_wow_enable(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to enable wow\n"); + rtw_wow_restore_ps(rtwdev); + goto out; + } + + ret = rtw_wow_enter_ps(rtwdev); + if (ret) + rtw_err(rtwdev, "failed to enter ps for wow\n"); + +out: + return ret; +} + +int rtw_wow_resume(struct rtw_dev *rtwdev) +{ + int ret; + + /* If wowlan mode is not enabled, do nothing */ + if (!test_bit(RTW_FLAG_WOWLAN, rtwdev->flags)) { + rtw_err(rtwdev, "wow is not enabled\n"); + ret = -EPERM; + goto out; + } + + ret = rtw_wow_leave_ps(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to leave ps from wowlan mode\n"); + goto out; + } + + rtw_wow_show_wakeup_reason(rtwdev); + + ret = rtw_wow_disable(rtwdev); + if (ret) { + rtw_err(rtwdev, "failed to disable wow\n"); + goto out; + } + + ret = rtw_wow_restore_ps(rtwdev); + if (ret) + rtw_err(rtwdev, "failed to restore ps to normal mode\n"); + +out: + rtw_wow_clear_wakeups(rtwdev); + return ret; +} |