--- /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 void ath9k_tx99_stop(struct ath_softc *sc)
+{
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+
+ ath_drain_all_txq(sc);
+ ath_startrecv(sc);
+
+ ath9k_hw_set_interrupts(ah);
+ ath9k_hw_enable_interrupts(ah);
+
+ ieee80211_wake_queues(sc->hw);
+
+ kfree_skb(sc->tx99_skb);
+ sc->tx99_skb = NULL;
+ sc->tx99_state = false;
+
+ ath9k_hw_tx99_stop(sc->sc_ah);
+ ath_dbg(common, XMIT, "TX99 stopped\n");
+}
+
+static struct sk_buff *ath9k_build_tx99_skb(struct ath_softc *sc)
+{
+ static u8 PN9Data[] = {0xff, 0x87, 0xb8, 0x59, 0xb7, 0xa1, 0xcc, 0x24,
+ 0x57, 0x5e, 0x4b, 0x9c, 0x0e, 0xe9, 0xea, 0x50,
+ 0x2a, 0xbe, 0xb4, 0x1b, 0xb6, 0xb0, 0x5d, 0xf1,
+ 0xe6, 0x9a, 0xe3, 0x45, 0xfd, 0x2c, 0x53, 0x18,
+ 0x0c, 0xca, 0xc9, 0xfb, 0x49, 0x37, 0xe5, 0xa8,
+ 0x51, 0x3b, 0x2f, 0x61, 0xaa, 0x72, 0x18, 0x84,
+ 0x02, 0x23, 0x23, 0xab, 0x63, 0x89, 0x51, 0xb3,
+ 0xe7, 0x8b, 0x72, 0x90, 0x4c, 0xe8, 0xfb, 0xc0};
+ u32 len = 1200;
+ struct ieee80211_tx_rate *rate;
+ struct ieee80211_hw *hw = sc->hw;
+ struct ath_hw *ah = sc->sc_ah;
+ struct ieee80211_hdr *hdr;
+ struct ieee80211_tx_info *tx_info;
+ struct sk_buff *skb;
+ struct ath_vif *avp;
+
+ if (!sc->tx99_vif)
+ return NULL;
+
+ avp = (struct ath_vif *)sc->tx99_vif->drv_priv;
+
+ skb = alloc_skb(len, GFP_KERNEL);
+ if (!skb)
+ return NULL;
+
+ skb_put(skb, len);
+
+ memset(skb->data, 0, len);
+
+ hdr = (struct ieee80211_hdr *)skb->data;
+ hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA);
+ hdr->duration_id = 0;
+
+ memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
+ memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
+ memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
+
+ hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
+
+ tx_info = IEEE80211_SKB_CB(skb);
+ memset(tx_info, 0, sizeof(*tx_info));
+ rate = &tx_info->control.rates[0];
+ tx_info->band = sc->cur_chan->chandef.chan->band;
+ tx_info->flags = IEEE80211_TX_CTL_NO_ACK;
+ tx_info->control.vif = sc->tx99_vif;
+ rate->count = 1;
+ if (ah->curchan && IS_CHAN_HT(ah->curchan)) {
+ rate->flags |= IEEE80211_TX_RC_MCS;
+ if (IS_CHAN_HT40(ah->curchan))
+ rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
+ }
+
+ memcpy(skb->data + sizeof(*hdr), PN9Data, sizeof(PN9Data));
+
+ return skb;
+}
+
+static void ath9k_tx99_deinit(struct ath_softc *sc)
+{
+ ath_reset(sc, NULL);
+
+ ath9k_ps_wakeup(sc);
+ ath9k_tx99_stop(sc);
+ ath9k_ps_restore(sc);
+}
+
+static int ath9k_tx99_init(struct ath_softc *sc)
+{
+ struct ieee80211_hw *hw = sc->hw;
+ struct ath_hw *ah = sc->sc_ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath_tx_control txctl;
+ int r;
+
+ if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
+ ath_err(common,
+ "driver is in invalid state unable to use TX99");
+ return -EINVAL;
+ }
+
+ sc->tx99_skb = ath9k_build_tx99_skb(sc);
+ if (!sc->tx99_skb)
+ return -ENOMEM;
+
+ memset(&txctl, 0, sizeof(txctl));
+ txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO];
+
+ ath_reset(sc, NULL);
+
+ ath9k_ps_wakeup(sc);
+
+ ath9k_hw_disable_interrupts(ah);
+ atomic_set(&ah->intr_ref_cnt, -1);
+ ath_drain_all_txq(sc);
+ ath_stoprecv(sc);
+
+ sc->tx99_state = true;
+
+ ieee80211_stop_queues(hw);
+
+ if (sc->tx99_power == MAX_RATE_POWER + 1)
+ sc->tx99_power = MAX_RATE_POWER;
+
+ ath9k_hw_tx99_set_txpower(ah, sc->tx99_power);
+ r = ath9k_tx99_send(sc, sc->tx99_skb, &txctl);
+ if (r) {
+ ath_dbg(common, XMIT, "Failed to xmit TX99 skb\n");
+ return r;
+ }
+
+ ath_dbg(common, XMIT, "TX99 xmit started using %d ( %ddBm)\n",
+ sc->tx99_power,
+ sc->tx99_power / 2);
+
+ /* We leave the harware awake as it will be chugging on */
+
+ return 0;
+}
+
+static ssize_t read_file_tx99(struct file *file, char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ath_softc *sc = file->private_data;
+ char buf[3];
+ unsigned int len;
+
+ len = sprintf(buf, "%d\n", sc->tx99_state);
+ return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
+static ssize_t write_file_tx99(struct file *file, const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ath_softc *sc = file->private_data;
+ struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+ char buf[32];
+ bool start;
+ ssize_t len;
+ int r;
+
+ if (sc->cur_chan->nvifs > 1)
+ return -EOPNOTSUPP;
+
+ len = min(count, sizeof(buf) - 1);
+ if (copy_from_user(buf, user_buf, len))
+ return -EFAULT;
+
+ if (strtobool(buf, &start))
+ return -EINVAL;
+
+ if (start == sc->tx99_state) {
+ if (!start)
+ return count;
+ ath_dbg(common, XMIT, "Resetting TX99\n");
+ ath9k_tx99_deinit(sc);
+ }
+
+ if (!start) {
+ ath9k_tx99_deinit(sc);
+ return count;
+ }
+
+ r = ath9k_tx99_init(sc);
+ if (r)
+ return r;
+
+ return count;
+}
+
+static const struct file_operations fops_tx99 = {
+ .read = read_file_tx99,
+ .write = write_file_tx99,
+ .open = simple_open,
+ .owner = THIS_MODULE,
+ .llseek = default_llseek,
+};
+
+static ssize_t read_file_tx99_power(struct file *file,
+ char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ath_softc *sc = file->private_data;
+ char buf[32];
+ unsigned int len;
+
+ len = sprintf(buf, "%d (%d dBm)\n",
+ sc->tx99_power,
+ sc->tx99_power / 2);
+
+ return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+}
+
+static ssize_t write_file_tx99_power(struct file *file,
+ const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct ath_softc *sc = file->private_data;
+ int r;
+ u8 tx_power;
+
+ r = kstrtou8_from_user(user_buf, count, 0, &tx_power);
+ if (r)
+ return r;
+
+ if (tx_power > MAX_RATE_POWER)
+ return -EINVAL;
+
+ sc->tx99_power = tx_power;
+
+ ath9k_ps_wakeup(sc);
+ ath9k_hw_tx99_set_txpower(sc->sc_ah, sc->tx99_power);
+ ath9k_ps_restore(sc);
+
+ return count;
+}
+
+static const struct file_operations fops_tx99_power = {
+ .read = read_file_tx99_power,
+ .write = write_file_tx99_power,
+ .open = simple_open,
+ .owner = THIS_MODULE,
+ .llseek = default_llseek,
+};
+
+void ath9k_tx99_init_debug(struct ath_softc *sc)
+{
+ if (!AR_SREV_9300_20_OR_LATER(sc->sc_ah))
+ return;
+
+ debugfs_create_file("tx99", S_IRUSR | S_IWUSR,
+ sc->debug.debugfs_phy, sc,
+ &fops_tx99);
+ debugfs_create_file("tx99_power", S_IRUSR | S_IWUSR,
+ sc->debug.debugfs_phy, sc,
+ &fops_tx99_power);
+}
Code Review / kvmfornfv.git / blobdiff