286 lines
6.8 KiB
C
286 lines
6.8 KiB
C
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/*
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* Copyright (c) 2013 Qualcomm Atheros, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "ath9k.h"
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static void ath9k_tx99_stop(struct ath_softc *sc)
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{
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struct ath_hw *ah = sc->sc_ah;
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struct ath_common *common = ath9k_hw_common(ah);
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ath_drain_all_txq(sc);
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ath_startrecv(sc);
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ath9k_hw_set_interrupts(ah);
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ath9k_hw_enable_interrupts(ah);
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ieee80211_wake_queues(sc->hw);
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kfree_skb(sc->tx99_skb);
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sc->tx99_skb = NULL;
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sc->tx99_state = false;
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ath9k_hw_tx99_stop(sc->sc_ah);
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ath_dbg(common, XMIT, "TX99 stopped\n");
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}
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static struct sk_buff *ath9k_build_tx99_skb(struct ath_softc *sc)
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{
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static u8 PN9Data[] = {0xff, 0x87, 0xb8, 0x59, 0xb7, 0xa1, 0xcc, 0x24,
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0x57, 0x5e, 0x4b, 0x9c, 0x0e, 0xe9, 0xea, 0x50,
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0x2a, 0xbe, 0xb4, 0x1b, 0xb6, 0xb0, 0x5d, 0xf1,
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0xe6, 0x9a, 0xe3, 0x45, 0xfd, 0x2c, 0x53, 0x18,
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0x0c, 0xca, 0xc9, 0xfb, 0x49, 0x37, 0xe5, 0xa8,
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0x51, 0x3b, 0x2f, 0x61, 0xaa, 0x72, 0x18, 0x84,
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0x02, 0x23, 0x23, 0xab, 0x63, 0x89, 0x51, 0xb3,
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0xe7, 0x8b, 0x72, 0x90, 0x4c, 0xe8, 0xfb, 0xc0};
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u32 len = 1200;
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struct ieee80211_tx_rate *rate;
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struct ieee80211_hw *hw = sc->hw;
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struct ath_hw *ah = sc->sc_ah;
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struct ieee80211_hdr *hdr;
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struct ieee80211_tx_info *tx_info;
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struct sk_buff *skb;
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struct ath_vif *avp;
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skb = alloc_skb(len, GFP_KERNEL);
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if (!skb)
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return NULL;
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skb_put(skb, len);
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memset(skb->data, 0, len);
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hdr = (struct ieee80211_hdr *)skb->data;
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hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA);
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hdr->duration_id = 0;
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memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
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memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
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memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
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if (sc->tx99_vif) {
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avp = (struct ath_vif *) sc->tx99_vif->drv_priv;
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hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
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}
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tx_info = IEEE80211_SKB_CB(skb);
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memset(tx_info, 0, sizeof(*tx_info));
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rate = &tx_info->control.rates[0];
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tx_info->band = sc->cur_chan->chandef.chan->band;
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tx_info->flags = IEEE80211_TX_CTL_NO_ACK;
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tx_info->control.vif = sc->tx99_vif;
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rate->count = 1;
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if (ah->curchan && IS_CHAN_HT(ah->curchan)) {
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rate->flags |= IEEE80211_TX_RC_MCS;
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if (IS_CHAN_HT40(ah->curchan))
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rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
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}
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memcpy(skb->data + sizeof(*hdr), PN9Data, sizeof(PN9Data));
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return skb;
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}
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static void ath9k_tx99_deinit(struct ath_softc *sc)
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{
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ath_reset(sc, NULL);
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ath9k_ps_wakeup(sc);
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ath9k_tx99_stop(sc);
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ath9k_ps_restore(sc);
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}
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static int ath9k_tx99_init(struct ath_softc *sc)
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{
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struct ieee80211_hw *hw = sc->hw;
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struct ath_hw *ah = sc->sc_ah;
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struct ath_common *common = ath9k_hw_common(ah);
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struct ath_tx_control txctl;
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int r;
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if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
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ath_err(common,
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"driver is in invalid state unable to use TX99");
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return -EINVAL;
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}
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sc->tx99_skb = ath9k_build_tx99_skb(sc);
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if (!sc->tx99_skb)
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return -ENOMEM;
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memset(&txctl, 0, sizeof(txctl));
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txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO];
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ath_reset(sc, NULL);
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ath9k_ps_wakeup(sc);
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ath9k_hw_disable_interrupts(ah);
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ath_drain_all_txq(sc);
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ath_stoprecv(sc);
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sc->tx99_state = true;
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ieee80211_stop_queues(hw);
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if (sc->tx99_power == MAX_RATE_POWER + 1)
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sc->tx99_power = MAX_RATE_POWER;
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ath9k_hw_tx99_set_txpower(ah, sc->tx99_power);
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r = ath9k_tx99_send(sc, sc->tx99_skb, &txctl);
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if (r) {
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ath_dbg(common, XMIT, "Failed to xmit TX99 skb\n");
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return r;
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}
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ath_dbg(common, XMIT, "TX99 xmit started using %d ( %ddBm)\n",
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sc->tx99_power,
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sc->tx99_power / 2);
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/* We leave the harware awake as it will be chugging on */
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return 0;
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}
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static ssize_t read_file_tx99(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_softc *sc = file->private_data;
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char buf[3];
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unsigned int len;
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len = sprintf(buf, "%d\n", sc->tx99_state);
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return simple_read_from_buffer(user_buf, count, ppos, buf, len);
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}
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static ssize_t write_file_tx99(struct file *file, const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_softc *sc = file->private_data;
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struct ath_common *common = ath9k_hw_common(sc->sc_ah);
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char buf[32];
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bool start;
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ssize_t len;
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int r;
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if (count < 1)
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return -EINVAL;
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if (sc->cur_chan->nvifs > 1)
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return -EOPNOTSUPP;
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len = min(count, sizeof(buf) - 1);
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if (copy_from_user(buf, user_buf, len))
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return -EFAULT;
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buf[len] = '\0';
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if (strtobool(buf, &start))
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return -EINVAL;
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mutex_lock(&sc->mutex);
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if (start == sc->tx99_state) {
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if (!start)
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goto out;
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ath_dbg(common, XMIT, "Resetting TX99\n");
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ath9k_tx99_deinit(sc);
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}
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if (!start) {
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ath9k_tx99_deinit(sc);
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goto out;
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}
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r = ath9k_tx99_init(sc);
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if (r) {
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mutex_unlock(&sc->mutex);
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return r;
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}
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out:
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mutex_unlock(&sc->mutex);
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return count;
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}
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static const struct file_operations fops_tx99 = {
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.read = read_file_tx99,
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.write = write_file_tx99,
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.open = simple_open,
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.owner = THIS_MODULE,
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.llseek = default_llseek,
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};
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static ssize_t read_file_tx99_power(struct file *file,
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char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_softc *sc = file->private_data;
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char buf[32];
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unsigned int len;
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len = sprintf(buf, "%d (%d dBm)\n",
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sc->tx99_power,
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sc->tx99_power / 2);
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return simple_read_from_buffer(user_buf, count, ppos, buf, len);
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}
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static ssize_t write_file_tx99_power(struct file *file,
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const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct ath_softc *sc = file->private_data;
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int r;
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u8 tx_power;
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r = kstrtou8_from_user(user_buf, count, 0, &tx_power);
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if (r)
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return r;
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if (tx_power > MAX_RATE_POWER)
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return -EINVAL;
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sc->tx99_power = tx_power;
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ath9k_ps_wakeup(sc);
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ath9k_hw_tx99_set_txpower(sc->sc_ah, sc->tx99_power);
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ath9k_ps_restore(sc);
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return count;
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}
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static const struct file_operations fops_tx99_power = {
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.read = read_file_tx99_power,
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.write = write_file_tx99_power,
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.open = simple_open,
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.owner = THIS_MODULE,
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.llseek = default_llseek,
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};
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void ath9k_tx99_init_debug(struct ath_softc *sc)
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{
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if (!AR_SREV_9280_20_OR_LATER(sc->sc_ah))
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return;
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debugfs_create_file("tx99", S_IRUSR | S_IWUSR,
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sc->debug.debugfs_phy, sc,
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&fops_tx99);
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debugfs_create_file("tx99_power", S_IRUSR | S_IWUSR,
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sc->debug.debugfs_phy, sc,
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&fops_tx99_power);
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}
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