1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * This file is part of wl1251 4 * 5 * Copyright (C) 2008 Nokia Corporation 6 */ 7 8 #include "reg.h" 9 #include "ps.h" 10 #include "cmd.h" 11 #include "io.h" 12 13 /* in ms */ 14 #define WL1251_WAKEUP_TIMEOUT 100 15 16 void wl1251_elp_work(struct work_struct *work) 17 { 18 struct delayed_work *dwork; 19 struct wl1251 *wl; 20 21 dwork = to_delayed_work(work); 22 wl = container_of(dwork, struct wl1251, elp_work); 23 24 wl1251_debug(DEBUG_PSM, "elp work"); 25 26 mutex_lock(&wl->mutex); 27 28 if (wl->elp || wl->station_mode == STATION_ACTIVE_MODE) 29 goto out; 30 31 wl1251_debug(DEBUG_PSM, "chip to elp"); 32 wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP); 33 wl->elp = true; 34 35 out: 36 mutex_unlock(&wl->mutex); 37 } 38 39 #define ELP_ENTRY_DELAY 5 40 41 /* Routines to toggle sleep mode while in ELP */ 42 void wl1251_ps_elp_sleep(struct wl1251 *wl) 43 { 44 unsigned long delay; 45 46 if (wl->station_mode != STATION_ACTIVE_MODE) { 47 delay = msecs_to_jiffies(ELP_ENTRY_DELAY); 48 ieee80211_queue_delayed_work(wl->hw, &wl->elp_work, delay); 49 } 50 } 51 52 int wl1251_ps_elp_wakeup(struct wl1251 *wl) 53 { 54 unsigned long timeout, start; 55 u32 elp_reg; 56 57 cancel_delayed_work(&wl->elp_work); 58 59 if (!wl->elp) 60 return 0; 61 62 wl1251_debug(DEBUG_PSM, "waking up chip from elp"); 63 64 start = jiffies; 65 timeout = jiffies + msecs_to_jiffies(WL1251_WAKEUP_TIMEOUT); 66 67 wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP); 68 69 elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR); 70 71 /* 72 * FIXME: we should wait for irq from chip but, as a temporary 73 * solution to simplify locking, let's poll instead 74 */ 75 while (!(elp_reg & ELPCTRL_WLAN_READY)) { 76 if (time_after(jiffies, timeout)) { 77 wl1251_error("elp wakeup timeout"); 78 return -ETIMEDOUT; 79 } 80 msleep(1); 81 elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR); 82 } 83 84 wl1251_debug(DEBUG_PSM, "wakeup time: %u ms", 85 jiffies_to_msecs(jiffies - start)); 86 87 wl->elp = false; 88 89 return 0; 90 } 91 92 int wl1251_ps_set_mode(struct wl1251 *wl, enum wl1251_station_mode mode) 93 { 94 int ret; 95 96 switch (mode) { 97 case STATION_POWER_SAVE_MODE: 98 wl1251_debug(DEBUG_PSM, "entering psm"); 99 100 /* enable beacon filtering */ 101 ret = wl1251_acx_beacon_filter_opt(wl, true); 102 if (ret < 0) 103 return ret; 104 105 ret = wl1251_acx_wake_up_conditions(wl, 106 WAKE_UP_EVENT_DTIM_BITMAP, 107 wl->listen_int); 108 if (ret < 0) 109 return ret; 110 111 ret = wl1251_acx_bet_enable(wl, WL1251_ACX_BET_ENABLE, 112 WL1251_DEFAULT_BET_CONSECUTIVE); 113 if (ret < 0) 114 return ret; 115 116 ret = wl1251_cmd_ps_mode(wl, CHIP_POWER_SAVE_MODE); 117 if (ret < 0) 118 return ret; 119 120 ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_ELP); 121 if (ret < 0) 122 return ret; 123 break; 124 case STATION_IDLE: 125 wl1251_debug(DEBUG_PSM, "entering idle"); 126 127 ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_ELP); 128 if (ret < 0) 129 return ret; 130 131 ret = wl1251_cmd_template_set(wl, CMD_DISCONNECT, NULL, 0); 132 if (ret < 0) 133 return ret; 134 break; 135 case STATION_ACTIVE_MODE: 136 default: 137 wl1251_debug(DEBUG_PSM, "leaving psm"); 138 139 ret = wl1251_acx_sleep_auth(wl, WL1251_PSM_CAM); 140 if (ret < 0) 141 return ret; 142 143 /* disable BET */ 144 ret = wl1251_acx_bet_enable(wl, WL1251_ACX_BET_DISABLE, 145 WL1251_DEFAULT_BET_CONSECUTIVE); 146 if (ret < 0) 147 return ret; 148 149 /* disable beacon filtering */ 150 ret = wl1251_acx_beacon_filter_opt(wl, false); 151 if (ret < 0) 152 return ret; 153 154 ret = wl1251_acx_wake_up_conditions(wl, 155 WAKE_UP_EVENT_DTIM_BITMAP, 156 wl->listen_int); 157 if (ret < 0) 158 return ret; 159 160 ret = wl1251_cmd_ps_mode(wl, CHIP_ACTIVE_MODE); 161 if (ret < 0) 162 return ret; 163 164 break; 165 } 166 wl->station_mode = mode; 167 168 return ret; 169 } 170 171