diff options
Diffstat (limited to 'drivers/net/wireless/ti/wl1251/event.c')
| -rw-r--r-- | drivers/net/wireless/ti/wl1251/event.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/drivers/net/wireless/ti/wl1251/event.c b/drivers/net/wireless/ti/wl1251/event.c new file mode 100644 index 0000000..f5acd24 --- /dev/null +++ b/drivers/net/wireless/ti/wl1251/event.c @@ -0,0 +1,240 @@ +/* + * This file is part of wl1251 + * + * Copyright (c) 1998-2007 Texas Instruments Incorporated + * Copyright (C) 2008 Nokia Corporation + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include "wl1251.h" +#include "reg.h" +#include "io.h" +#include "event.h" +#include "ps.h" + +static int wl1251_event_scan_complete(struct wl1251 *wl, + struct event_mailbox *mbox) +{ + int ret = 0; + + wl1251_debug(DEBUG_EVENT, "status: 0x%x, channels: %d", + mbox->scheduled_scan_status, + mbox->scheduled_scan_channels); + + if (wl->scanning) { + struct cfg80211_scan_info info = { + .aborted = false, + }; + + ieee80211_scan_completed(wl->hw, &info); + wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed"); + wl->scanning = false; + if (wl->hw->conf.flags & IEEE80211_CONF_IDLE) + ret = wl1251_ps_set_mode(wl, STATION_IDLE); + } + + return ret; +} + +#define WL1251_PSM_ENTRY_RETRIES 3 +static int wl1251_event_ps_report(struct wl1251 *wl, + struct event_mailbox *mbox) +{ + int ret = 0; + + wl1251_debug(DEBUG_EVENT, "ps status: %x", mbox->ps_status); + + switch (mbox->ps_status) { + case EVENT_ENTER_POWER_SAVE_FAIL: + wl1251_debug(DEBUG_PSM, "PSM entry failed"); + + if (wl->station_mode != STATION_POWER_SAVE_MODE) { + /* remain in active mode */ + wl->psm_entry_retry = 0; + break; + } + + if (wl->psm_entry_retry < WL1251_PSM_ENTRY_RETRIES) { + wl->psm_entry_retry++; + ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE); + } else { + wl1251_error("Power save entry failed, giving up"); + wl->psm_entry_retry = 0; + } + break; + case EVENT_ENTER_POWER_SAVE_SUCCESS: + case EVENT_EXIT_POWER_SAVE_FAIL: + case EVENT_EXIT_POWER_SAVE_SUCCESS: + default: + wl->psm_entry_retry = 0; + break; + } + + return 0; +} + +static void wl1251_event_mbox_dump(struct event_mailbox *mbox) +{ + wl1251_debug(DEBUG_EVENT, "MBOX DUMP:"); + wl1251_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector); + wl1251_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask); +} + +static int wl1251_event_process(struct wl1251 *wl, struct event_mailbox *mbox) +{ + int ret; + u32 vector; + + wl1251_event_mbox_dump(mbox); + + vector = mbox->events_vector & ~(mbox->events_mask); + wl1251_debug(DEBUG_EVENT, "vector: 0x%x", vector); + + if (vector & SCAN_COMPLETE_EVENT_ID) { + ret = wl1251_event_scan_complete(wl, mbox); + if (ret < 0) + return ret; + } + + if (vector & BSS_LOSE_EVENT_ID) { + wl1251_debug(DEBUG_EVENT, "BSS_LOSE_EVENT"); + + if (wl->psm_requested && + wl->station_mode != STATION_ACTIVE_MODE) { + ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE); + if (ret < 0) + return ret; + } + } + + if (vector & PS_REPORT_EVENT_ID) { + wl1251_debug(DEBUG_EVENT, "PS_REPORT_EVENT"); + ret = wl1251_event_ps_report(wl, mbox); + if (ret < 0) + return ret; + } + + if (vector & SYNCHRONIZATION_TIMEOUT_EVENT_ID) { + wl1251_debug(DEBUG_EVENT, "SYNCHRONIZATION_TIMEOUT_EVENT"); + + /* indicate to the stack, that beacons have been lost */ + if (wl->vif && wl->vif->type == NL80211_IFTYPE_STATION) + ieee80211_beacon_loss(wl->vif); + } + + if (vector & REGAINED_BSS_EVENT_ID) { + if (wl->psm_requested) { + ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE); + if (ret < 0) + return ret; + } + } + + if (wl->vif && wl->rssi_thold) { + if (vector & ROAMING_TRIGGER_LOW_RSSI_EVENT_ID) { + wl1251_debug(DEBUG_EVENT, + "ROAMING_TRIGGER_LOW_RSSI_EVENT"); + ieee80211_cqm_rssi_notify(wl->vif, + NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, + 0, GFP_KERNEL); + } + + if (vector & ROAMING_TRIGGER_REGAINED_RSSI_EVENT_ID) { + wl1251_debug(DEBUG_EVENT, + "ROAMING_TRIGGER_REGAINED_RSSI_EVENT"); + ieee80211_cqm_rssi_notify(wl->vif, + NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, + 0, GFP_KERNEL); + } + } + + return 0; +} + +/* + * Poll the mailbox event field until any of the bits in the mask is set or a + * timeout occurs (WL1251_EVENT_TIMEOUT in msecs) + */ +int wl1251_event_wait(struct wl1251 *wl, u32 mask, int timeout_ms) +{ + u32 events_vector, event; + unsigned long timeout; + + timeout = jiffies + msecs_to_jiffies(timeout_ms); + + do { + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; + + msleep(1); + + /* read from both event fields */ + wl1251_mem_read(wl, wl->mbox_ptr[0], &events_vector, + sizeof(events_vector)); + event = events_vector & mask; + wl1251_mem_read(wl, wl->mbox_ptr[1], &events_vector, + sizeof(events_vector)); + event |= events_vector & mask; + } while (!event); + + return 0; +} + +int wl1251_event_unmask(struct wl1251 *wl) +{ + int ret; + + ret = wl1251_acx_event_mbox_mask(wl, ~(wl->event_mask)); + if (ret < 0) + return ret; + + return 0; +} + +void wl1251_event_mbox_config(struct wl1251 *wl) +{ + wl->mbox_ptr[0] = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR); + wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox); + + wl1251_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x", + wl->mbox_ptr[0], wl->mbox_ptr[1]); +} + +int wl1251_event_handle(struct wl1251 *wl, u8 mbox_num) +{ + struct event_mailbox mbox; + int ret; + + wl1251_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num); + + if (mbox_num > 1) + return -EINVAL; + + /* first we read the mbox descriptor */ + wl1251_mem_read(wl, wl->mbox_ptr[mbox_num], &mbox, + sizeof(struct event_mailbox)); + + /* process the descriptor */ + ret = wl1251_event_process(wl, &mbox); + if (ret < 0) + return ret; + + /* then we let the firmware know it can go on...*/ + wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK); + + return 0; +} |