1 files changed, 255 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c b/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c
new file mode 100644
index 000000000000..c10c7d002eb7
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c
@@ -0,0 +1,255 @@
+/*
+ * Copyright (c) 2010 Atheros Communications 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 "htc.h"
+
+#define FUDGE 2
+
+static void ath9k_htc_beacon_config_sta(struct ath9k_htc_priv *priv,
+                                        struct htc_beacon_config *bss_conf)
+{
+        struct ath_common *common = ath9k_hw_common(priv->ah);
+        struct ath9k_beacon_state bs;
+        enum ath9k_int imask = 0;
+        int dtimperiod, dtimcount, sleepduration;
+        int cfpperiod, cfpcount, bmiss_timeout;
+        u32 nexttbtt = 0, intval, tsftu;
+        __be32 htc_imask = 0;
+        u64 tsf;
+        int num_beacons, offset, dtim_dec_count, cfp_dec_count;
+        int ret;
+        u8 cmd_rsp;
+
+        memset(&bs, 0, sizeof(bs));
+
+        intval = bss_conf->beacon_interval & ATH9K_BEACON_PERIOD;
+        bmiss_timeout = (ATH_DEFAULT_BMISS_LIMIT * bss_conf->beacon_interval);
+
+        /*
+         * Setup dtim and cfp parameters according to
+         * last beacon we received (which may be none).
+         */
+        dtimperiod = bss_conf->dtim_period;
+        if (dtimperiod <= 0)            /* NB: 0 if not known */
+                dtimperiod = 1;
+        dtimcount = 1;
+        if (dtimcount >= dtimperiod)    /* NB: sanity check */
+                dtimcount = 0;
+        cfpperiod = 1;                  /* NB: no PCF support yet */
+        cfpcount = 0;
+
+        sleepduration = intval;
+        if (sleepduration <= 0)
+                sleepduration = intval;
+
+        /*
+         * Pull nexttbtt forward to reflect the current
+         * TSF and calculate dtim+cfp state for the result.
+         */
+        tsf = ath9k_hw_gettsf64(priv->ah);
+        tsftu = TSF_TO_TU(tsf>>32, tsf) + FUDGE;
+
+        num_beacons = tsftu / intval + 1;
+        offset = tsftu % intval;
+        nexttbtt = tsftu - offset;
+        if (offset)
+                nexttbtt += intval;
+
+        /* DTIM Beacon every dtimperiod Beacon */
+        dtim_dec_count = num_beacons % dtimperiod;
+        /* CFP every cfpperiod DTIM Beacon */
+        cfp_dec_count = (num_beacons / dtimperiod) % cfpperiod;
+        if (dtim_dec_count)
+                cfp_dec_count++;
+
+        dtimcount -= dtim_dec_count;
+        if (dtimcount < 0)
+                dtimcount += dtimperiod;
+
+        cfpcount -= cfp_dec_count;
+        if (cfpcount < 0)
+                cfpcount += cfpperiod;
+
+        bs.bs_intval = intval;
+        bs.bs_nexttbtt = nexttbtt;
+        bs.bs_dtimperiod = dtimperiod*intval;
+        bs.bs_nextdtim = bs.bs_nexttbtt + dtimcount*intval;
+        bs.bs_cfpperiod = cfpperiod*bs.bs_dtimperiod;
+        bs.bs_cfpnext = bs.bs_nextdtim + cfpcount*bs.bs_dtimperiod;
+        bs.bs_cfpmaxduration = 0;
+
+        /*
+         * Calculate the number of consecutive beacons to miss* before taking
+         * a BMISS interrupt. The configuration is specified in TU so we only
+         * need calculate based on the beacon interval.  Note that we clamp the
+         * result to at most 15 beacons.
+         */
+        if (sleepduration > intval) {
+                bs.bs_bmissthreshold = ATH_DEFAULT_BMISS_LIMIT / 2;
+        } else {
+                bs.bs_bmissthreshold = DIV_ROUND_UP(bmiss_timeout, intval);
+                if (bs.bs_bmissthreshold > 15)
+                        bs.bs_bmissthreshold = 15;
+                else if (bs.bs_bmissthreshold <= 0)
+                        bs.bs_bmissthreshold = 1;
+        }
+
+        /*
+         * Calculate sleep duration. The configuration is given in ms.
+         * We ensure a multiple of the beacon period is used. Also, if the sleep
+         * duration is greater than the DTIM period then it makes senses
+         * to make it a multiple of that.
+         *
+         * XXX fixed at 100ms
+         */
+
+        bs.bs_sleepduration = roundup(IEEE80211_MS_TO_TU(100), sleepduration);
+        if (bs.bs_sleepduration > bs.bs_dtimperiod)
+                bs.bs_sleepduration = bs.bs_dtimperiod;
+
+        /* TSF out of range threshold fixed at 1 second */
+        bs.bs_tsfoor_threshold = ATH9K_TSFOOR_THRESHOLD;
+
+        ath_print(common, ATH_DBG_BEACON, "tsf: %llu tsftu: %u\n", tsf, tsftu);
+        ath_print(common, ATH_DBG_BEACON,
+                  "bmiss: %u sleep: %u cfp-period: %u maxdur: %u next: %u\n",
+                  bs.bs_bmissthreshold, bs.bs_sleepduration,
+                  bs.bs_cfpperiod, bs.bs_cfpmaxduration, bs.bs_cfpnext);
+
+        /* Set the computed STA beacon timers */
+
+        WMI_CMD(WMI_DISABLE_INTR_CMDID);
+        ath9k_hw_set_sta_beacon_timers(priv->ah, &bs);
+        imask |= ATH9K_INT_BMISS;
+        htc_imask = cpu_to_be32(imask);
+        WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
+}
+
+static void ath9k_htc_beacon_config_adhoc(struct ath9k_htc_priv *priv,
+                                          struct htc_beacon_config *bss_conf)
+{
+        struct ath_common *common = ath9k_hw_common(priv->ah);
+        enum ath9k_int imask = 0;
+        u32 nexttbtt, intval;
+        __be32 htc_imask = 0;
+        int ret;
+        u8 cmd_rsp;
+
+        intval = bss_conf->beacon_interval & ATH9K_BEACON_PERIOD;
+        nexttbtt = intval;
+        intval |= ATH9K_BEACON_ENA;
+        if (priv->op_flags & OP_ENABLE_BEACON)
+                imask |= ATH9K_INT_SWBA;
+
+        ath_print(common, ATH_DBG_BEACON,
+                  "IBSS Beacon config, intval: %d, imask: 0x%x\n",
+                  bss_conf->beacon_interval, imask);
+
+        WMI_CMD(WMI_DISABLE_INTR_CMDID);
+        ath9k_hw_beaconinit(priv->ah, nexttbtt, intval);
+        priv->bmiss_cnt = 0;
+        htc_imask = cpu_to_be32(imask);
+        WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask);
+}
+
+void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb,
+                        enum htc_endpoint_id ep_id, bool txok)
+{
+        dev_kfree_skb_any(skb);
+}
+
+void ath9k_htc_swba(struct ath9k_htc_priv *priv, u8 beacon_pending)
+{
+        struct ath9k_htc_vif *avp = (void *)priv->vif->drv_priv;
+        struct tx_beacon_header beacon_hdr;
+        struct ath9k_htc_tx_ctl tx_ctl;
+        struct ieee80211_tx_info *info;
+        struct sk_buff *beacon;
+        u8 *tx_fhdr;
+
+        memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header));
+        memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl));
+
+        /* FIXME: Handle BMISS */
+        if (beacon_pending != 0) {
+                priv->bmiss_cnt++;
+                return;
+        }
+
+        spin_lock_bh(&priv->beacon_lock);
+
+        if (unlikely(priv->op_flags & OP_SCANNING)) {
+                spin_unlock_bh(&priv->beacon_lock);
+                return;
+        }
+
+        /* Get a new beacon */
+        beacon = ieee80211_beacon_get(priv->hw, priv->vif);
+        if (!beacon) {
+                spin_unlock_bh(&priv->beacon_lock);
+                return;
+        }
+
+        info = IEEE80211_SKB_CB(beacon);
+        if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
+                struct ieee80211_hdr *hdr =
+                        (struct ieee80211_hdr *) beacon->data;
+                priv->seq_no += 0x10;
+                hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
+                hdr->seq_ctrl |= cpu_to_le16(priv->seq_no);
+        }
+
+        tx_ctl.type = ATH9K_HTC_NORMAL;
+        beacon_hdr.vif_index = avp->index;
+        tx_fhdr = skb_push(beacon, sizeof(beacon_hdr));
+        memcpy(tx_fhdr, (u8 *) &beacon_hdr, sizeof(beacon_hdr));
+
+        htc_send(priv->htc, beacon, priv->beacon_ep, &tx_ctl);
+
+        spin_unlock_bh(&priv->beacon_lock);
+}
+
+
+void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv,
+                             struct ieee80211_vif *vif)
+{
+        struct ath_common *common = ath9k_hw_common(priv->ah);
+        struct htc_beacon_config *cur_conf = &priv->cur_beacon_conf;
+        struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
+
+        cur_conf->beacon_interval = bss_conf->beacon_int;
+        if (cur_conf->beacon_interval == 0)
+                cur_conf->beacon_interval = 100;
+
+        cur_conf->dtim_period = bss_conf->dtim_period;
+        cur_conf->listen_interval = 1;
+        cur_conf->dtim_count = 1;
+        cur_conf->bmiss_timeout =
+                ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval;
+
+        switch (vif->type) {
+        case NL80211_IFTYPE_STATION:
+                ath9k_htc_beacon_config_sta(priv, cur_conf);
+                break;
+        case NL80211_IFTYPE_ADHOC:
+                ath9k_htc_beacon_config_adhoc(priv, cur_conf);
+                break;
+        default:
+                ath_print(common, ATH_DBG_CONFIG,
+                          "Unsupported beaconing mode\n");
+                return;
+        }
+}