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