carl9170_set_state_when(ar, CARL9170_IDLE, CARL9170_STARTED);
+ ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
+ round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
+
ieee80211_wake_queues(ar->hw);
err = 0;
static void carl9170_cancel_worker(struct ar9170 *ar)
{
+ cancel_delayed_work_sync(&ar->stat_work);
cancel_delayed_work_sync(&ar->tx_janitor);
#ifdef CONFIG_CARL9170_LEDS
cancel_delayed_work_sync(&ar->led_work);
mutex_unlock(&ar->mutex);
}
+static int carl9170_update_survey(struct ar9170 *ar, bool flush, bool noise)
+{
+ int err;
+
+ if (noise) {
+ err = carl9170_get_noisefloor(ar);
+ if (err)
+ return err;
+ }
+
+ if (ar->fw.hw_counters) {
+ err = carl9170_collect_tally(ar);
+ if (err)
+ return err;
+ }
+
+ if (flush)
+ memset(&ar->tally, 0, sizeof(ar->tally));
+
+ return 0;
+}
+
+static void carl9170_stat_work(struct work_struct *work)
+{
+ struct ar9170 *ar = container_of(work, struct ar9170, stat_work.work);
+ int err;
+
+ mutex_lock(&ar->mutex);
+ err = carl9170_update_survey(ar, false, true);
+ mutex_unlock(&ar->mutex);
+
+ if (err)
+ return;
+
+ ieee80211_queue_delayed_work(ar->hw, &ar->stat_work,
+ round_jiffies(msecs_to_jiffies(CARL9170_STAT_WORK)));
+}
static int carl9170_op_config(struct ieee80211_hw *hw, u32 changed)
{
if (err)
goto out;
+ err = carl9170_update_survey(ar, true, false);
+ if (err)
+ goto out;
+
err = carl9170_set_channel(ar, hw->conf.channel,
hw->conf.channel_type, CARL9170_RFI_NONE);
if (err)
goto out;
+ err = carl9170_update_survey(ar, false, true);
+ if (err)
+ goto out;
+
err = carl9170_set_dyn_sifs_ack(ar);
if (err)
goto out;
}
#endif /* CONFIG_CARL9170_WPC */
-static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx,
- struct survey_info *survey)
+#ifdef CONFIG_CARL9170_HWRNG
+static int carl9170_rng_get(struct ar9170 *ar)
{
- struct ar9170 *ar = hw->priv;
+
+#define RW (CARL9170_MAX_CMD_PAYLOAD_LEN / sizeof(u32))
+#define RB (CARL9170_MAX_CMD_PAYLOAD_LEN)
+
+ static const __le32 rng_load[RW] = {
+ [0 ... (RW - 1)] = cpu_to_le32(AR9170_RAND_REG_NUM)};
+
+ u32 buf[RW];
+
+ unsigned int i, off = 0, transfer, count;
int err;
- if (idx != 0)
- return -ENOENT;
+ BUILD_BUG_ON(RB > CARL9170_MAX_CMD_PAYLOAD_LEN);
+
+ if (!IS_ACCEPTING_CMD(ar) || !ar->rng.initialized)
+ return -EAGAIN;
+
+ count = ARRAY_SIZE(ar->rng.cache);
+ while (count) {
+ err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
+ RB, (u8 *) rng_load,
+ RB, (u8 *) buf);
+ if (err)
+ return err;
+
+ transfer = min_t(unsigned int, count, RW);
+ for (i = 0; i < transfer; i++)
+ ar->rng.cache[off + i] = buf[i];
+
+ off += transfer;
+ count -= transfer;
+ }
+
+ ar->rng.cache_idx = 0;
+
+#undef RW
+#undef RB
+ return 0;
+}
+
+static int carl9170_rng_read(struct hwrng *rng, u32 *data)
+{
+ struct ar9170 *ar = (struct ar9170 *)rng->priv;
+ int ret = -EIO;
mutex_lock(&ar->mutex);
- err = carl9170_get_noisefloor(ar);
+ if (ar->rng.cache_idx >= ARRAY_SIZE(ar->rng.cache)) {
+ ret = carl9170_rng_get(ar);
+ if (ret) {
+ mutex_unlock(&ar->mutex);
+ return ret;
+ }
+ }
+
+ *data = ar->rng.cache[ar->rng.cache_idx++];
mutex_unlock(&ar->mutex);
- if (err)
+
+ return sizeof(u16);
+}
+
+static void carl9170_unregister_hwrng(struct ar9170 *ar)
+{
+ if (ar->rng.initialized) {
+ hwrng_unregister(&ar->rng.rng);
+ ar->rng.initialized = false;
+ }
+}
+
+static int carl9170_register_hwrng(struct ar9170 *ar)
+{
+ int err;
+
+ snprintf(ar->rng.name, ARRAY_SIZE(ar->rng.name),
+ "%s_%s", KBUILD_MODNAME, wiphy_name(ar->hw->wiphy));
+ ar->rng.rng.name = ar->rng.name;
+ ar->rng.rng.data_read = carl9170_rng_read;
+ ar->rng.rng.priv = (unsigned long)ar;
+
+ if (WARN_ON(ar->rng.initialized))
+ return -EALREADY;
+
+ err = hwrng_register(&ar->rng.rng);
+ if (err) {
+ dev_err(&ar->udev->dev, "Failed to register the random "
+ "number generator (%d)\n", err);
return err;
+ }
+
+ ar->rng.initialized = true;
+
+ err = carl9170_rng_get(ar);
+ if (err) {
+ carl9170_unregister_hwrng(ar);
+ return err;
+ }
+
+ return 0;
+}
+#endif /* CONFIG_CARL9170_HWRNG */
+
+static int carl9170_op_get_survey(struct ieee80211_hw *hw, int idx,
+ struct survey_info *survey)
+{
+ struct ar9170 *ar = hw->priv;
+ struct ieee80211_channel *chan;
+ struct ieee80211_supported_band *band;
+ int err, b, i;
- survey->channel = ar->channel;
+ chan = ar->channel;
+ if (!chan)
+ return -ENODEV;
+
+ if (idx == chan->hw_value) {
+ mutex_lock(&ar->mutex);
+ err = carl9170_update_survey(ar, false, true);
+ mutex_unlock(&ar->mutex);
+ if (err)
+ return err;
+ }
+
+ for (b = 0; b < IEEE80211_NUM_BANDS; b++) {
+ band = ar->hw->wiphy->bands[b];
+
+ if (!band)
+ continue;
+
+ for (i = 0; i < band->n_channels; i++) {
+ if (band->channels[i].hw_value == idx) {
+ chan = &band->channels[i];
+ goto found;
+ }
+ }
+ }
+ return -ENOENT;
+
+found:
+ memcpy(survey, &ar->survey[idx], sizeof(*survey));
+
+ survey->channel = chan;
survey->filled = SURVEY_INFO_NOISE_DBM;
- survey->noise = ar->noise[0];
+
+ if (ar->channel == chan)
+ survey->filled |= SURVEY_INFO_IN_USE;
+
+ if (ar->fw.hw_counters) {
+ survey->filled |= SURVEY_INFO_CHANNEL_TIME |
+ SURVEY_INFO_CHANNEL_TIME_BUSY |
+ SURVEY_INFO_CHANNEL_TIME_TX;
+ }
+
return 0;
}
INIT_WORK(&ar->ping_work, carl9170_ping_work);
INIT_WORK(&ar->restart_work, carl9170_restart_work);
INIT_WORK(&ar->ampdu_work, carl9170_ampdu_work);
+ INIT_DELAYED_WORK(&ar->stat_work, carl9170_stat_work);
INIT_DELAYED_WORK(&ar->tx_janitor, carl9170_tx_janitor);
INIT_LIST_HEAD(&ar->tx_ampdu_list);
rcu_assign_pointer(ar->tx_ampdu_iter,
struct ath_regulatory *regulatory = &ar->common.regulatory;
unsigned int rx_streams, tx_streams, tx_params = 0;
int bands = 0;
+ int chans = 0;
if (ar->eeprom.length == cpu_to_le16(0xffff))
return -ENODATA;
if (ar->eeprom.operating_flags & AR9170_OPFLAG_2GHZ) {
ar->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
&carl9170_band_2GHz;
+ chans += carl9170_band_2GHz.n_channels;
bands++;
}
if (ar->eeprom.operating_flags & AR9170_OPFLAG_5GHZ) {
ar->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
&carl9170_band_5GHz;
+ chans += carl9170_band_5GHz.n_channels;
bands++;
}
+ if (!bands)
+ return -EINVAL;
+
+ ar->survey = kzalloc(sizeof(struct survey_info) * chans, GFP_KERNEL);
+ if (!ar->survey)
+ return -ENOMEM;
+ ar->num_channels = chans;
+
/*
* I measured this, a bandswitch takes roughly
* 135 ms and a frequency switch about 80.
/* second part of wiphy init */
SET_IEEE80211_PERM_ADDR(ar->hw, ar->eeprom.mac_address);
- return bands ? 0 : -EINVAL;
+ return 0;
}
static int carl9170_reg_notifier(struct wiphy *wiphy,
goto err_unreg;
#endif /* CONFIG_CARL9170_WPC */
+#ifdef CONFIG_CARL9170_HWRNG
+ err = carl9170_register_hwrng(ar);
+ if (err)
+ goto err_unreg;
+#endif /* CONFIG_CARL9170_HWRNG */
+
dev_info(&ar->udev->dev, "Atheros AR9170 is registered as '%s'\n",
wiphy_name(ar->hw->wiphy));
}
#endif /* CONFIG_CARL9170_WPC */
+#ifdef CONFIG_CARL9170_HWRNG
+ carl9170_unregister_hwrng(ar);
+#endif /* CONFIG_CARL9170_HWRNG */
+
carl9170_cancel_worker(ar);
cancel_work_sync(&ar->restart_work);
kfree(ar->mem_bitmap);
ar->mem_bitmap = NULL;
+ kfree(ar->survey);
+ ar->survey = NULL;
+
mutex_destroy(&ar->mutex);
ieee80211_free_hw(ar->hw);
projects / karo-tx-linux.git / blobdiff