1 /* 2 * This file is part of wl1251 3 * 4 * Copyright (c) 1998-2007 Texas Instruments Incorporated 5 * Copyright (C) 2008 Nokia Corporation 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * version 2 as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 19 * 02110-1301 USA 20 * 21 */ 22 23 #include "wl1251.h" 24 #include "reg.h" 25 #include "io.h" 26 #include "event.h" 27 #include "ps.h" 28 29 static int wl1251_event_scan_complete(struct wl1251 *wl, 30 struct event_mailbox *mbox) 31 { 32 int ret = 0; 33 34 wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d", 35 mbox->scheduled_scan_status, 36 mbox->scheduled_scan_channels); 37 38 if (wl->scanning) { 39 ieee80211_scan_completed(wl->hw, false); 40 wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed"); 41 wl->scanning = false; 42 if (wl->hw->conf.flags & IEEE80211_CONF_IDLE) 43 ret = wl1251_ps_set_mode(wl, STATION_IDLE); 44 } 45 46 return ret; 47 } 48 49 static void wl1251_event_mbox_dump(struct event_mailbox *mbox) 50 { 51 wl1251_debug(DEBUG_EVENT, "MBOX DUMP:"); 52 wl1251_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector); 53 wl1251_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask); 54 } 55 56 static int wl1251_event_process(struct wl1251 *wl, struct event_mailbox *mbox) 57 { 58 int ret; 59 u32 vector; 60 61 wl1251_event_mbox_dump(mbox); 62 63 vector = mbox->events_vector & ~(mbox->events_mask); 64 wl1251_debug(DEBUG_EVENT, "vector: 0x%x", vector); 65 66 if (vector & SCAN_COMPLETE_EVENT_ID) { 67 ret = wl1251_event_scan_complete(wl, mbox); 68 if (ret < 0) 69 return ret; 70 } 71 72 if (vector & BSS_LOSE_EVENT_ID) { 73 wl1251_debug(DEBUG_EVENT, "BSS_LOSE_EVENT"); 74 75 if (wl->psm_requested && 76 wl->station_mode != STATION_ACTIVE_MODE) { 77 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE); 78 if (ret < 0) 79 return ret; 80 } 81 } 82 83 if (vector & SYNCHRONIZATION_TIMEOUT_EVENT_ID) { 84 wl1251_debug(DEBUG_EVENT, "SYNCHRONIZATION_TIMEOUT_EVENT"); 85 86 /* indicate to the stack, that beacons have been lost */ 87 ieee80211_beacon_loss(wl->vif); 88 } 89 90 if (vector & REGAINED_BSS_EVENT_ID) { 91 if (wl->psm_requested) { 92 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE); 93 if (ret < 0) 94 return ret; 95 } 96 } 97 98 if (wl->vif && wl->rssi_thold) { 99 if (vector & ROAMING_TRIGGER_LOW_RSSI_EVENT_ID) { 100 wl1251_debug(DEBUG_EVENT, 101 "ROAMING_TRIGGER_LOW_RSSI_EVENT"); 102 ieee80211_cqm_rssi_notify(wl->vif, 103 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 104 GFP_KERNEL); 105 } 106 107 if (vector & ROAMING_TRIGGER_REGAINED_RSSI_EVENT_ID) { 108 wl1251_debug(DEBUG_EVENT, 109 "ROAMING_TRIGGER_REGAINED_RSSI_EVENT"); 110 ieee80211_cqm_rssi_notify(wl->vif, 111 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 112 GFP_KERNEL); 113 } 114 } 115 116 return 0; 117 } 118 119 /* 120 * Poll the mailbox event field until any of the bits in the mask is set or a 121 * timeout occurs (WL1251_EVENT_TIMEOUT in msecs) 122 */ 123 int wl1251_event_wait(struct wl1251 *wl, u32 mask, int timeout_ms) 124 { 125 u32 events_vector, event; 126 unsigned long timeout; 127 128 timeout = jiffies + msecs_to_jiffies(timeout_ms); 129 130 do { 131 if (time_after(jiffies, timeout)) 132 return -ETIMEDOUT; 133 134 msleep(1); 135 136 /* read from both event fields */ 137 wl1251_mem_read(wl, wl->mbox_ptr[0], &events_vector, 138 sizeof(events_vector)); 139 event = events_vector & mask; 140 wl1251_mem_read(wl, wl->mbox_ptr[1], &events_vector, 141 sizeof(events_vector)); 142 event |= events_vector & mask; 143 } while (!event); 144 145 return 0; 146 } 147 148 int wl1251_event_unmask(struct wl1251 *wl) 149 { 150 int ret; 151 152 ret = wl1251_acx_event_mbox_mask(wl, ~(wl->event_mask)); 153 if (ret < 0) 154 return ret; 155 156 return 0; 157 } 158 159 void wl1251_event_mbox_config(struct wl1251 *wl) 160 { 161 wl->mbox_ptr[0] = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR); 162 wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox); 163 164 wl1251_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x", 165 wl->mbox_ptr[0], wl->mbox_ptr[1]); 166 } 167 168 int wl1251_event_handle(struct wl1251 *wl, u8 mbox_num) 169 { 170 struct event_mailbox mbox; 171 int ret; 172 173 wl1251_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num); 174 175 if (mbox_num > 1) 176 return -EINVAL; 177 178 /* first we read the mbox descriptor */ 179 wl1251_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox, 180 sizeof(struct event_mailbox)); 181 182 /* process the descriptor */ 183 ret = wl1251_event_process(wl, &mbox); 184 if (ret < 0) 185 return ret; 186 187 /* then we let the firmware know it can go on...*/ 188 wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK); 189 190 return 0; 191 } 192