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285 lines
6.8 KiB
285 lines
6.8 KiB
/* |
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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 hardware 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", 0600, |
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sc->debug.debugfs_phy, sc, |
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&fops_tx99); |
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debugfs_create_file("tx99_power", 0600, |
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sc->debug.debugfs_phy, sc, |
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&fops_tx99_power); |
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}
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