--- /dev/null
+/*
+ * Copyright (c) 2013 Qualcomm Atheros, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "ath9k.h"
+
+static const struct wiphy_wowlan_support ath9k_wowlan_support_legacy = {
+ .flags = WIPHY_WOWLAN_MAGIC_PKT | WIPHY_WOWLAN_DISCONNECT,
+ .n_patterns = MAX_NUM_USER_PATTERN,
+ .pattern_min_len = 1,
+ .pattern_max_len = MAX_PATTERN_SIZE,
+};
+
+static const struct wiphy_wowlan_support ath9k_wowlan_support = {
+ .flags = WIPHY_WOWLAN_MAGIC_PKT | WIPHY_WOWLAN_DISCONNECT,
+ .n_patterns = MAX_NUM_PATTERN - 2,
+ .pattern_min_len = 1,
+ .pattern_max_len = MAX_PATTERN_SIZE,
+};
+
+static u8 ath9k_wow_map_triggers(struct ath_softc *sc,
+ struct cfg80211_wowlan *wowlan)
+{
+ u8 wow_triggers = 0;
+
+ if (wowlan->disconnect)
+ wow_triggers |= AH_WOW_LINK_CHANGE |
+ AH_WOW_BEACON_MISS;
+ if (wowlan->magic_pkt)
+ wow_triggers |= AH_WOW_MAGIC_PATTERN_EN;
+
+ if (wowlan->n_patterns)
+ wow_triggers |= AH_WOW_USER_PATTERN_EN;
+
+ return wow_triggers;
+}
+
+static int ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc)
+{
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ int pattern_count = 0;
+ int ret, i, byte_cnt = 0;
+ u8 dis_deauth_pattern[MAX_PATTERN_SIZE];
+ u8 dis_deauth_mask[MAX_PATTERN_SIZE];
+
+ memset(dis_deauth_pattern, 0, MAX_PATTERN_SIZE);
+ memset(dis_deauth_mask, 0, MAX_PATTERN_SIZE);
+
+ /*
+ * Create Dissassociate / Deauthenticate packet filter
+ *
+ * 2 bytes 2 byte 6 bytes 6 bytes 6 bytes
+ * +--------------+----------+---------+--------+--------+----
+ * + Frame Control+ Duration + DA + SA + BSSID +
+ * +--------------+----------+---------+--------+--------+----
+ *
+ * The above is the management frame format for disassociate/
+ * deauthenticate pattern, from this we need to match the first byte
+ * of 'Frame Control' and DA, SA, and BSSID fields
+ * (skipping 2nd byte of FC and Duration feild.
+ *
+ * Disassociate pattern
+ * --------------------
+ * Frame control = 00 00 1010
+ * DA, SA, BSSID = x:x:x:x:x:x
+ * Pattern will be A0000000 | x:x:x:x:x:x | x:x:x:x:x:x
+ * | x:x:x:x:x:x -- 22 bytes
+ *
+ * Deauthenticate pattern
+ * ----------------------
+ * Frame control = 00 00 1100
+ * DA, SA, BSSID = x:x:x:x:x:x
+ * Pattern will be C0000000 | x:x:x:x:x:x | x:x:x:x:x:x
+ * | x:x:x:x:x:x -- 22 bytes
+ */
+
+ /* Fill out the mask with all FF's */
+ for (i = 0; i < MAX_PATTERN_MASK_SIZE; i++)
+ dis_deauth_mask[i] = 0xff;
+
+ /* copy the first byte of frame control field */
+ dis_deauth_pattern[byte_cnt] = 0xa0;
+ byte_cnt++;
+
+ /* skip 2nd byte of frame control and Duration field */
+ byte_cnt += 3;
+
+ /*
+ * need not match the destination mac address, it can be a broadcast
+ * mac address or an unicast to this station
+ */
+ byte_cnt += 6;
+
+ /* copy the source mac address */
+ memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN);
+
+ byte_cnt += 6;
+
+ /* copy the bssid, its same as the source mac address */
+ memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN);
+
+ /* Create Disassociate pattern mask */
+ dis_deauth_mask[0] = 0xfe;
+ dis_deauth_mask[1] = 0x03;
+ dis_deauth_mask[2] = 0xc0;
+
+ ret = ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
+ pattern_count, byte_cnt);
+ if (ret)
+ goto exit;
+
+ pattern_count++;
+ /*
+ * for de-authenticate pattern, only the first byte of the frame
+ * control field gets changed from 0xA0 to 0xC0
+ */
+ dis_deauth_pattern[0] = 0xC0;
+
+ ret = ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
+ pattern_count, byte_cnt);
+exit:
+ return ret;
+}
+
+static int ath9k_wow_add_pattern(struct ath_softc *sc,
+ struct cfg80211_wowlan *wowlan)
+{
+ struct ath_hw *ah = sc->sc_ah;
+ struct cfg80211_pkt_pattern *patterns = wowlan->patterns;
+ u8 wow_pattern[MAX_PATTERN_SIZE];
+ u8 wow_mask[MAX_PATTERN_SIZE];
+ int mask_len, ret = 0;
+ s8 i = 0;
+
+ for (i = 0; i < wowlan->n_patterns; i++) {
+ mask_len = DIV_ROUND_UP(patterns[i].pattern_len, 8);
+ memset(wow_pattern, 0, MAX_PATTERN_SIZE);
+ memset(wow_mask, 0, MAX_PATTERN_SIZE);
+ memcpy(wow_pattern, patterns[i].pattern, patterns[i].pattern_len);
+ memcpy(wow_mask, patterns[i].mask, mask_len);
+
+ ret = ath9k_hw_wow_apply_pattern(ah,
+ wow_pattern,
+ wow_mask,
+ i + 2,
+ patterns[i].pattern_len);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+int ath9k_suspend(struct ieee80211_hw *hw,
+ struct cfg80211_wowlan *wowlan)
+{
+ struct ath_softc *sc = hw->priv;
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ u8 triggers;
+ int ret = 0;
+
+ ath9k_deinit_channel_context(sc);
+
+ mutex_lock(&sc->mutex);
+
+ if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
+ ath_err(common, "Device not present\n");
+ ret = -ENODEV;
+ goto fail_wow;
+ }
+
+ if (WARN_ON(!wowlan)) {
+ ath_err(common, "None of the WoW triggers enabled\n");
+ ret = -EINVAL;
+ goto fail_wow;
+ }
+
+ if (sc->cur_chan->nvifs > 1) {
+ ath_dbg(common, WOW, "WoW for multivif is not yet supported\n");
+ ret = 1;
+ goto fail_wow;
+ }
+
+ if (ath9k_is_chanctx_enabled()) {
+ if (test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags)) {
+ ath_dbg(common, WOW,
+ "Multi-channel WOW is not supported\n");
+ ret = 1;
+ goto fail_wow;
+ }
+ }
+
+ if (!test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) {
+ ath_dbg(common, WOW, "None of the STA vifs are associated\n");
+ ret = 1;
+ goto fail_wow;
+ }
+
+ triggers = ath9k_wow_map_triggers(sc, wowlan);
+ if (!triggers) {
+ ath_dbg(common, WOW, "No valid WoW triggers\n");
+ ret = 1;
+ goto fail_wow;
+ }
+
+ ath_cancel_work(sc);
+ ath_stop_ani(sc);
+
+ ath9k_ps_wakeup(sc);
+
+ ath9k_stop_btcoex(sc);
+
+ /*
+ * Enable wake up on recieving disassoc/deauth
+ * frame by default.
+ */
+ ret = ath9k_wow_add_disassoc_deauth_pattern(sc);
+ if (ret) {
+ ath_err(common,
+ "Unable to add disassoc/deauth pattern: %d\n", ret);
+ goto fail_wow;
+ }
+
+ if (triggers & AH_WOW_USER_PATTERN_EN) {
+ ret = ath9k_wow_add_pattern(sc, wowlan);
+ if (ret) {
+ ath_err(common,
+ "Unable to add user pattern: %d\n", ret);
+ goto fail_wow;
+ }
+ }
+
+ spin_lock_bh(&sc->sc_pcu_lock);
+ /*
+ * To avoid false wake, we enable beacon miss interrupt only
+ * when we go to sleep. We save the current interrupt mask
+ * so we can restore it after the system wakes up
+ */
+ sc->wow_intr_before_sleep = ah->imask;
+ ah->imask &= ~ATH9K_INT_GLOBAL;
+ ath9k_hw_disable_interrupts(ah);
+ ah->imask = ATH9K_INT_BMISS | ATH9K_INT_GLOBAL;
+ ath9k_hw_set_interrupts(ah);
+ ath9k_hw_enable_interrupts(ah);
+
+ spin_unlock_bh(&sc->sc_pcu_lock);
+
+ /*
+ * we can now sync irq and kill any running tasklets, since we already
+ * disabled interrupts and not holding a spin lock
+ */
+ synchronize_irq(sc->irq);
+ tasklet_kill(&sc->intr_tq);
+
+ ath9k_hw_wow_enable(ah, triggers);
+
+ ath9k_ps_restore(sc);
+ ath_dbg(common, WOW, "Suspend with WoW triggers: 0x%x\n", triggers);
+
+ set_bit(ATH_OP_WOW_ENABLED, &common->op_flags);
+fail_wow:
+ mutex_unlock(&sc->mutex);
+ return ret;
+}
+
+int ath9k_resume(struct ieee80211_hw *hw)
+{
+ struct ath_softc *sc = hw->priv;
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ u8 status;
+
+ mutex_lock(&sc->mutex);
+
+ ath9k_ps_wakeup(sc);
+
+ spin_lock_bh(&sc->sc_pcu_lock);
+
+ ath9k_hw_disable_interrupts(ah);
+ ah->imask = sc->wow_intr_before_sleep;
+ ath9k_hw_set_interrupts(ah);
+ ath9k_hw_enable_interrupts(ah);
+
+ spin_unlock_bh(&sc->sc_pcu_lock);
+
+ status = ath9k_hw_wow_wakeup(ah);
+ ath_dbg(common, WOW, "Resume with WoW status: 0x%x\n", status);
+
+ ath_restart_work(sc);
+ ath9k_start_btcoex(sc);
+
+ clear_bit(ATH_OP_WOW_ENABLED, &common->op_flags);
+
+ ath9k_ps_restore(sc);
+ mutex_unlock(&sc->mutex);
+
+ return 0;
+}
+
+void ath9k_set_wakeup(struct ieee80211_hw *hw, bool enabled)
+{
+ struct ath_softc *sc = hw->priv;
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+
+ mutex_lock(&sc->mutex);
+ device_set_wakeup_enable(sc->dev, enabled);
+ mutex_unlock(&sc->mutex);
+
+ ath_dbg(common, WOW, "WoW wakeup source is %s\n",
+ (enabled) ? "enabled" : "disabled");
+}
+
+void ath9k_init_wow(struct ieee80211_hw *hw)
+{
+ struct ath_softc *sc = hw->priv;
+ struct ath_hw *ah = sc->sc_ah;
+
+ if ((sc->driver_data & ATH9K_PCI_WOW) || sc->force_wow) {
+ if (AR_SREV_9462_20_OR_LATER(ah) || AR_SREV_9565_11_OR_LATER(ah))
+ hw->wiphy->wowlan = &ath9k_wowlan_support;
+ else
+ hw->wiphy->wowlan = &ath9k_wowlan_support_legacy;
+
+ device_init_wakeup(sc->dev, 1);
+ }
+}
+
+void ath9k_deinit_wow(struct ieee80211_hw *hw)
+{
+ struct ath_softc *sc = hw->priv;
+
+ if ((sc->driver_data & ATH9K_PCI_WOW) || sc->force_wow)
+ device_init_wakeup(sc->dev, 0);
+}
Code Review / kvmfornfv.git / blobdiff