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0ec2f2724d
With the scan callback now being callable from any context, these unlocks/locks can go away. This makes the code easier to understand, since callers of these functions must no longer be aware that the mutex may be dropped. As Stanislaw is working on iwlwifi scanning, I didn't change it to take advantage of the new mac80211 semantics. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
169 lines
4.1 KiB
C
169 lines
4.1 KiB
C
/*
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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 "wl1251_reg.h"
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#include "wl1251_io.h"
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#include "wl1251_event.h"
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#include "wl1251_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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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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ieee80211_scan_completed(wl->hw, false);
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wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan completed");
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wl->scanning = false;
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}
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return 0;
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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 && wl->psm) {
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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 & SYNCHRONIZATION_TIMEOUT_EVENT_ID && wl->psm) {
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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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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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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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