1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * This file is part of wl1251 4 * 5 * Copyright (c) 1998-2007 Texas Instruments Incorporated 6 * Copyright (C) 2008 Nokia Corporation 7 */ 8 9#include "wl1251.h" 10#include "reg.h" 11#include "io.h" 12#include "event.h" 13#include "ps.h" 14 15static int wl1251_event_scan_complete(struct wl1251 *wl, 16 struct event_mailbox *mbox) 17{ 18 int ret = 0; 19 20 wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d", 21 mbox->scheduled_scan_status, 22 mbox->scheduled_scan_channels); 23 24 if (wl->scanning) { 25 struct cfg80211_scan_info info = { 26 .aborted = false, 27 }; 28 29 ieee80211_scan_completed(wl->hw, &info); 30 wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed"); 31 wl->scanning = false; 32 if (wl->hw->conf.flags & IEEE80211_CONF_IDLE) 33 ret = wl1251_ps_set_mode(wl, STATION_IDLE); 34 } 35 36 return ret; 37} 38 39#define WL1251_PSM_ENTRY_RETRIES 3 40static int wl1251_event_ps_report(struct wl1251 *wl, 41 struct event_mailbox *mbox) 42{ 43 int ret = 0; 44 45 wl1251_debug(DEBUG_EVENT, "ps status: %x", mbox->ps_status); 46 47 switch (mbox->ps_status) { 48 case EVENT_ENTER_POWER_SAVE_FAIL: 49 wl1251_debug(DEBUG_PSM, "PSM entry failed"); 50 51 if (wl->station_mode != STATION_POWER_SAVE_MODE) { 52 /* remain in active mode */ 53 wl->psm_entry_retry = 0; 54 break; 55 } 56 57 if (wl->psm_entry_retry < WL1251_PSM_ENTRY_RETRIES) { 58 wl->psm_entry_retry++; 59 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE); 60 } else { 61 wl1251_error("Power save entry failed, giving up"); 62 wl->psm_entry_retry = 0; 63 } 64 break; 65 case EVENT_ENTER_POWER_SAVE_SUCCESS: 66 case EVENT_EXIT_POWER_SAVE_FAIL: 67 case EVENT_EXIT_POWER_SAVE_SUCCESS: 68 default: 69 wl->psm_entry_retry = 0; 70 break; 71 } 72 73 return ret; 74} 75 76static void wl1251_event_mbox_dump(struct event_mailbox *mbox) 77{ 78 wl1251_debug(DEBUG_EVENT, "MBOX DUMP:"); 79 wl1251_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector); 80 wl1251_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask); 81} 82 83static int wl1251_event_process(struct wl1251 *wl, struct event_mailbox *mbox) 84{ 85 int ret; 86 u32 vector; 87 88 wl1251_event_mbox_dump(mbox); 89 90 vector = mbox->events_vector & ~(mbox->events_mask); 91 wl1251_debug(DEBUG_EVENT, "vector: 0x%x", vector); 92 93 if (vector & SCAN_COMPLETE_EVENT_ID) { 94 ret = wl1251_event_scan_complete(wl, mbox); 95 if (ret < 0) 96 return ret; 97 } 98 99 if (vector & BSS_LOSE_EVENT_ID) { 100 wl1251_debug(DEBUG_EVENT, "BSS_LOSE_EVENT"); 101 102 if (wl->psm_requested && 103 wl->station_mode != STATION_ACTIVE_MODE) { 104 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE); 105 if (ret < 0) 106 return ret; 107 } 108 } 109 110 if (vector & PS_REPORT_EVENT_ID) { 111 wl1251_debug(DEBUG_EVENT, "PS_REPORT_EVENT"); 112 ret = wl1251_event_ps_report(wl, mbox); 113 if (ret < 0) 114 return ret; 115 } 116 117 if (vector & SYNCHRONIZATION_TIMEOUT_EVENT_ID) { 118 wl1251_debug(DEBUG_EVENT, "SYNCHRONIZATION_TIMEOUT_EVENT"); 119 120 /* indicate to the stack, that beacons have been lost */ 121 if (wl->vif && wl->vif->type == NL80211_IFTYPE_STATION) 122 ieee80211_beacon_loss(wl->vif); 123 } 124 125 if (vector & REGAINED_BSS_EVENT_ID) { 126 if (wl->psm_requested) { 127 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE); 128 if (ret < 0) 129 return ret; 130 } 131 } 132 133 if (wl->vif && wl->rssi_thold) { 134 if (vector & ROAMING_TRIGGER_LOW_RSSI_EVENT_ID) { 135 wl1251_debug(DEBUG_EVENT, 136 "ROAMING_TRIGGER_LOW_RSSI_EVENT"); 137 ieee80211_cqm_rssi_notify(wl->vif, 138 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 139 0, GFP_KERNEL); 140 } 141 142 if (vector & ROAMING_TRIGGER_REGAINED_RSSI_EVENT_ID) { 143 wl1251_debug(DEBUG_EVENT, 144 "ROAMING_TRIGGER_REGAINED_RSSI_EVENT"); 145 ieee80211_cqm_rssi_notify(wl->vif, 146 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 147 0, GFP_KERNEL); 148 } 149 } 150 151 return 0; 152} 153 154/* 155 * Poll the mailbox event field until any of the bits in the mask is set or a 156 * timeout occurs (WL1251_EVENT_TIMEOUT in msecs) 157 */ 158int wl1251_event_wait(struct wl1251 *wl, u32 mask, int timeout_ms) 159{ 160 u32 events_vector, event; 161 unsigned long timeout; 162 163 timeout = jiffies + msecs_to_jiffies(timeout_ms); 164 165 do { 166 if (time_after(jiffies, timeout)) 167 return -ETIMEDOUT; 168 169 msleep(1); 170 171 /* read from both event fields */ 172 wl1251_mem_read(wl, wl->mbox_ptr[0], &events_vector, 173 sizeof(events_vector)); 174 event = events_vector & mask; 175 wl1251_mem_read(wl, wl->mbox_ptr[1], &events_vector, 176 sizeof(events_vector)); 177 event |= events_vector & mask; 178 } while (!event); 179 180 return 0; 181} 182 183int wl1251_event_unmask(struct wl1251 *wl) 184{ 185 int ret; 186 187 ret = wl1251_acx_event_mbox_mask(wl, ~(wl->event_mask)); 188 if (ret < 0) 189 return ret; 190 191 return 0; 192} 193 194void wl1251_event_mbox_config(struct wl1251 *wl) 195{ 196 wl->mbox_ptr[0] = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR); 197 wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox); 198 199 wl1251_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x", 200 wl->mbox_ptr[0], wl->mbox_ptr[1]); 201} 202 203int wl1251_event_handle(struct wl1251 *wl, u8 mbox_num) 204{ 205 struct event_mailbox mbox; 206 int ret; 207 208 wl1251_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num); 209 210 if (mbox_num > 1) 211 return -EINVAL; 212 213 /* first we read the mbox descriptor */ 214 wl1251_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox, 215 sizeof(struct event_mailbox)); 216 217 /* process the descriptor */ 218 ret = wl1251_event_process(wl, &mbox); 219 if (ret < 0) 220 return ret; 221 222 /* then we let the firmware know it can go on...*/ 223 wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK); 224 225 return 0; 226} 227