250 lines
6.5 KiB
C
250 lines
6.5 KiB
C
/*
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* This file is part of wl1271
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*
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* Copyright (C) 2008-2009 Nokia Corporation
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*
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* Contact: Luciano Coelho <luciano.coelho@nokia.com>
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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 "wl1271.h"
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#include "wl1271_reg.h"
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#include "wl1271_io.h"
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#include "wl1271_event.h"
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#include "wl1271_ps.h"
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#include "wl12xx_80211.h"
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static int wl1271_event_scan_complete(struct wl1271 *wl,
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struct event_mailbox *mbox)
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{
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int size = sizeof(struct wl12xx_probe_req_template);
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wl1271_debug(DEBUG_EVENT, "status: 0x%x",
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mbox->scheduled_scan_status);
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if (test_bit(WL1271_FLAG_SCANNING, &wl->flags)) {
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if (wl->scan.state == WL1271_SCAN_BAND_DUAL) {
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wl1271_cmd_template_set(wl, CMD_TEMPL_CFG_PROBE_REQ_2_4,
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NULL, size);
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/* 2.4 GHz band scanned, scan 5 GHz band, pretend
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* to the wl1271_cmd_scan function that we are not
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* scanning as it checks that.
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*/
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clear_bit(WL1271_FLAG_SCANNING, &wl->flags);
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/* FIXME: ie missing! */
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wl1271_cmd_scan(wl, wl->scan.ssid, wl->scan.ssid_len,
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NULL, 0,
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wl->scan.active,
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wl->scan.high_prio,
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WL1271_SCAN_BAND_5_GHZ,
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wl->scan.probe_requests);
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} else {
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if (wl->scan.state == WL1271_SCAN_BAND_2_4_GHZ)
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wl1271_cmd_template_set(wl,
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CMD_TEMPL_CFG_PROBE_REQ_2_4,
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NULL, size);
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else
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wl1271_cmd_template_set(wl,
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CMD_TEMPL_CFG_PROBE_REQ_5,
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NULL, size);
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mutex_unlock(&wl->mutex);
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ieee80211_scan_completed(wl->hw, false);
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mutex_lock(&wl->mutex);
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clear_bit(WL1271_FLAG_SCANNING, &wl->flags);
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}
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}
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return 0;
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}
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static int wl1271_event_ps_report(struct wl1271 *wl,
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struct event_mailbox *mbox,
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bool *beacon_loss)
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{
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int ret = 0;
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wl1271_debug(DEBUG_EVENT, "ps_status: 0x%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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wl1271_debug(DEBUG_PSM, "PSM entry failed");
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if (!test_bit(WL1271_FLAG_PSM, &wl->flags)) {
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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 < wl->conf.conn.psm_entry_retries) {
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wl->psm_entry_retry++;
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ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE,
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true);
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} else {
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wl1271_error("PSM entry failed, giving up.\n");
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/* FIXME: this may need to be reconsidered. for now it
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is not possible to indicate to the mac80211
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afterwards that PSM entry failed. To maximize
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functionality (receiving data and remaining
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associated) make sure that we are in sync with the
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AP in regard of PSM mode. */
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ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE,
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false);
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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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wl->psm_entry_retry = 0;
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/* enable beacon filtering */
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ret = wl1271_acx_beacon_filter_opt(wl, true);
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if (ret < 0)
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break;
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/* enable beacon early termination */
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ret = wl1271_acx_bet_enable(wl, true);
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if (ret < 0)
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break;
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/* go to extremely low power mode */
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wl1271_ps_elp_sleep(wl);
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if (ret < 0)
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break;
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break;
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case EVENT_EXIT_POWER_SAVE_FAIL:
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wl1271_debug(DEBUG_PSM, "PSM exit failed");
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if (test_bit(WL1271_FLAG_PSM, &wl->flags)) {
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wl->psm_entry_retry = 0;
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break;
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}
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/* make sure the firmware goes to active mode - the frame to
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be sent next will indicate to the AP, that we are active. */
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ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE,
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false);
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break;
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case EVENT_EXIT_POWER_SAVE_SUCCESS:
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default:
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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 wl1271_event_mbox_dump(struct event_mailbox *mbox)
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{
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wl1271_debug(DEBUG_EVENT, "MBOX DUMP:");
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wl1271_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
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wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
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}
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static int wl1271_event_process(struct wl1271 *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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bool beacon_loss = false;
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wl1271_event_mbox_dump(mbox);
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vector = le32_to_cpu(mbox->events_vector);
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vector &= ~(le32_to_cpu(mbox->events_mask));
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wl1271_debug(DEBUG_EVENT, "vector: 0x%x", vector);
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if (vector & SCAN_COMPLETE_EVENT_ID) {
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ret = wl1271_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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/*
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* The BSS_LOSE_EVENT_ID is only needed while psm (and hence beacon
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* filtering) is enabled. Without PSM, the stack will receive all
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* beacons and can detect beacon loss by itself.
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*/
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if (vector & BSS_LOSE_EVENT_ID &&
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test_bit(WL1271_FLAG_PSM, &wl->flags)) {
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wl1271_debug(DEBUG_EVENT, "BSS_LOSE_EVENT");
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/* indicate to the stack, that beacons have been lost */
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beacon_loss = true;
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}
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if (vector & PS_REPORT_EVENT_ID) {
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wl1271_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
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ret = wl1271_event_ps_report(wl, mbox, &beacon_loss);
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if (ret < 0)
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return ret;
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}
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if (wl->vif && beacon_loss) {
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/* Obviously, it's dangerous to release the mutex while
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we are holding many of the variables in the wl struct.
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That's why it's done last in the function, and care must
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be taken that nothing more is done after this function
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returns. */
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mutex_unlock(&wl->mutex);
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ieee80211_beacon_loss(wl->vif);
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mutex_lock(&wl->mutex);
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}
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return 0;
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}
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int wl1271_event_unmask(struct wl1271 *wl)
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{
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int ret;
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ret = wl1271_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 wl1271_event_mbox_config(struct wl1271 *wl)
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{
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wl->mbox_ptr[0] = wl1271_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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wl1271_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 wl1271_event_handle(struct wl1271 *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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wl1271_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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wl1271_read(wl, wl->mbox_ptr[mbox_num], &mbox,
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sizeof(struct event_mailbox), false);
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/* process the descriptor */
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ret = wl1271_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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wl1271_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
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return 0;
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}
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