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 wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d", 33 mbox->scheduled_scan_status, 34 mbox->scheduled_scan_channels); 35 36 if (wl->scanning) { 37 ieee80211_scan_completed(wl->hw, false); 38 wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed"); 39 wl->scanning = false; 40 } 41 42 return 0; 43 } 44 45 static void wl1251_event_mbox_dump(struct event_mailbox *mbox) 46 { 47 wl1251_debug(DEBUG_EVENT, "MBOX DUMP:"); 48 wl1251_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector); 49 wl1251_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask); 50 } 51 52 static int wl1251_event_process(struct wl1251 *wl, struct event_mailbox *mbox) 53 { 54 int ret; 55 u32 vector; 56 57 wl1251_event_mbox_dump(mbox); 58 59 vector = mbox->events_vector & ~(mbox->events_mask); 60 wl1251_debug(DEBUG_EVENT, "vector: 0x%x", vector); 61 62 if (vector & SCAN_COMPLETE_EVENT_ID) { 63 ret = wl1251_event_scan_complete(wl, mbox); 64 if (ret < 0) 65 return ret; 66 } 67 68 if (vector & BSS_LOSE_EVENT_ID) { 69 wl1251_debug(DEBUG_EVENT, "BSS_LOSE_EVENT"); 70 71 if (wl->psm_requested && 72 wl->station_mode != STATION_ACTIVE_MODE) { 73 ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE); 74 if (ret < 0) 75 return ret; 76 } 77 } 78 79 if (vector & SYNCHRONIZATION_TIMEOUT_EVENT_ID) { 80 wl1251_debug(DEBUG_EVENT, "SYNCHRONIZATION_TIMEOUT_EVENT"); 81 82 /* indicate to the stack, that beacons have been lost */ 83 ieee80211_beacon_loss(wl->vif); 84 } 85 86 if (vector & REGAINED_BSS_EVENT_ID) { 87 if (wl->psm_requested) { 88 ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE); 89 if (ret < 0) 90 return ret; 91 } 92 } 93 94 if (wl->vif && wl->rssi_thold) { 95 if (vector & ROAMING_TRIGGER_LOW_RSSI_EVENT_ID) { 96 wl1251_debug(DEBUG_EVENT, 97 "ROAMING_TRIGGER_LOW_RSSI_EVENT"); 98 ieee80211_cqm_rssi_notify(wl->vif, 99 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 100 GFP_KERNEL); 101 } 102 103 if (vector & ROAMING_TRIGGER_REGAINED_RSSI_EVENT_ID) { 104 wl1251_debug(DEBUG_EVENT, 105 "ROAMING_TRIGGER_REGAINED_RSSI_EVENT"); 106 ieee80211_cqm_rssi_notify(wl->vif, 107 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 108 GFP_KERNEL); 109 } 110 } 111 112 return 0; 113 } 114 115 /* 116 * Poll the mailbox event field until any of the bits in the mask is set or a 117 * timeout occurs (WL1251_EVENT_TIMEOUT in msecs) 118 */ 119 int wl1251_event_wait(struct wl1251 *wl, u32 mask, int timeout_ms) 120 { 121 u32 events_vector, event; 122 unsigned long timeout; 123 124 timeout = jiffies + msecs_to_jiffies(timeout_ms); 125 126 do { 127 if (time_after(jiffies, timeout)) 128 return -ETIMEDOUT; 129 130 msleep(1); 131 132 /* read from both event fields */ 133 wl1251_mem_read(wl, wl->mbox_ptr[0], &events_vector, 134 sizeof(events_vector)); 135 event = events_vector & mask; 136 wl1251_mem_read(wl, wl->mbox_ptr[1], &events_vector, 137 sizeof(events_vector)); 138 event |= events_vector & mask; 139 } while (!event); 140 141 return 0; 142 } 143 144 int wl1251_event_unmask(struct wl1251 *wl) 145 { 146 int ret; 147 148 ret = wl1251_acx_event_mbox_mask(wl, ~(wl->event_mask)); 149 if (ret < 0) 150 return ret; 151 152 return 0; 153 } 154 155 void wl1251_event_mbox_config(struct wl1251 *wl) 156 { 157 wl->mbox_ptr[0] = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR); 158 wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox); 159 160 wl1251_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x", 161 wl->mbox_ptr[0], wl->mbox_ptr[1]); 162 } 163 164 int wl1251_event_handle(struct wl1251 *wl, u8 mbox_num) 165 { 166 struct event_mailbox mbox; 167 int ret; 168 169 wl1251_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num); 170 171 if (mbox_num > 1) 172 return -EINVAL; 173 174 /* first we read the mbox descriptor */ 175 wl1251_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox, 176 sizeof(struct event_mailbox)); 177 178 /* process the descriptor */ 179 ret = wl1251_event_process(wl, &mbox); 180 if (ret < 0) 181 return ret; 182 183 /* then we let the firmware know it can go on...*/ 184 wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK); 185 186 return 0; 187 } 188