+/* Fallback to lowest rate, if rate is unknown. */
+static u8 rate_to_zd_rate(u8 rate)
+{
+ switch (rate) {
+ case IEEE80211_CCK_RATE_2MB:
+ return ZD_CCK_RATE_2M;
+ case IEEE80211_CCK_RATE_5MB:
+ return ZD_CCK_RATE_5_5M;
+ case IEEE80211_CCK_RATE_11MB:
+ return ZD_CCK_RATE_11M;
+ case IEEE80211_OFDM_RATE_6MB:
+ return ZD_OFDM_RATE_6M;
+ case IEEE80211_OFDM_RATE_9MB:
+ return ZD_OFDM_RATE_9M;
+ case IEEE80211_OFDM_RATE_12MB:
+ return ZD_OFDM_RATE_12M;
+ case IEEE80211_OFDM_RATE_18MB:
+ return ZD_OFDM_RATE_18M;
+ case IEEE80211_OFDM_RATE_24MB:
+ return ZD_OFDM_RATE_24M;
+ case IEEE80211_OFDM_RATE_36MB:
+ return ZD_OFDM_RATE_36M;
+ case IEEE80211_OFDM_RATE_48MB:
+ return ZD_OFDM_RATE_48M;
+ case IEEE80211_OFDM_RATE_54MB:
+ return ZD_OFDM_RATE_54M;
+ }
+ return ZD_CCK_RATE_1M;
+}
+
+static u16 rate_to_cr_rate(u8 rate)
+{
+ switch (rate) {
+ case IEEE80211_CCK_RATE_2MB:
+ return CR_RATE_1M;
+ case IEEE80211_CCK_RATE_5MB:
+ return CR_RATE_5_5M;
+ case IEEE80211_CCK_RATE_11MB:
+ return CR_RATE_11M;
+ case IEEE80211_OFDM_RATE_6MB:
+ return CR_RATE_6M;
+ case IEEE80211_OFDM_RATE_9MB:
+ return CR_RATE_9M;
+ case IEEE80211_OFDM_RATE_12MB:
+ return CR_RATE_12M;
+ case IEEE80211_OFDM_RATE_18MB:
+ return CR_RATE_18M;
+ case IEEE80211_OFDM_RATE_24MB:
+ return CR_RATE_24M;
+ case IEEE80211_OFDM_RATE_36MB:
+ return CR_RATE_36M;
+ case IEEE80211_OFDM_RATE_48MB:
+ return CR_RATE_48M;
+ case IEEE80211_OFDM_RATE_54MB:
+ return CR_RATE_54M;
+ }
+ return CR_RATE_1M;
+}
+
+static void try_enable_tx(struct zd_mac *mac)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&mac->lock, flags);
+ if (mac->updating_rts_rate == 0 && mac->updating_basic_rates == 0)
+ netif_wake_queue(mac->netdev);
+ spin_unlock_irqrestore(&mac->lock, flags);
+}
+
+static void set_rts_cts_work(struct work_struct *work)
+{
+ struct zd_mac *mac =
+ container_of(work, struct zd_mac, set_rts_cts_work.work);
+ unsigned long flags;
+ u8 rts_rate;
+ unsigned int short_preamble;
+
+ mutex_lock(&mac->chip.mutex);
+
+ spin_lock_irqsave(&mac->lock, flags);
+ mac->updating_rts_rate = 0;
+ rts_rate = mac->rts_rate;
+ short_preamble = mac->short_preamble;
+ spin_unlock_irqrestore(&mac->lock, flags);
+
+ zd_chip_set_rts_cts_rate_locked(&mac->chip, rts_rate, short_preamble);
+ mutex_unlock(&mac->chip.mutex);
+
+ try_enable_tx(mac);
+}
+
+static void set_basic_rates_work(struct work_struct *work)
+{
+ struct zd_mac *mac =
+ container_of(work, struct zd_mac, set_basic_rates_work.work);
+ unsigned long flags;
+ u16 basic_rates;
+
+ mutex_lock(&mac->chip.mutex);
+
+ spin_lock_irqsave(&mac->lock, flags);
+ mac->updating_basic_rates = 0;
+ basic_rates = mac->basic_rates;
+ spin_unlock_irqrestore(&mac->lock, flags);
+
+ zd_chip_set_basic_rates_locked(&mac->chip, basic_rates);
+ mutex_unlock(&mac->chip.mutex);
+
+ try_enable_tx(mac);
+}
+
+static void bssinfo_change(struct net_device *netdev, u32 changes)
+{
+ struct zd_mac *mac = zd_netdev_mac(netdev);
+ struct ieee80211softmac_device *softmac = ieee80211_priv(netdev);
+ struct ieee80211softmac_bss_info *bssinfo = &softmac->bssinfo;
+ int need_set_rts_cts = 0;
+ int need_set_rates = 0;
+ u16 basic_rates;
+ unsigned long flags;
+
+ dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
+
+ if (changes & IEEE80211SOFTMAC_BSSINFOCHG_SHORT_PREAMBLE) {
+ spin_lock_irqsave(&mac->lock, flags);
+ mac->short_preamble = bssinfo->short_preamble;
+ spin_unlock_irqrestore(&mac->lock, flags);
+ need_set_rts_cts = 1;
+ }
+
+ if (changes & IEEE80211SOFTMAC_BSSINFOCHG_RATES) {
+ /* Set RTS rate to highest available basic rate */
+ u8 hi_rate = ieee80211softmac_highest_supported_rate(softmac,
+ &bssinfo->supported_rates, 1);
+ hi_rate = rate_to_zd_rate(hi_rate);
+
+ spin_lock_irqsave(&mac->lock, flags);
+ if (hi_rate != mac->rts_rate) {
+ mac->rts_rate = hi_rate;
+ need_set_rts_cts = 1;
+ }
+ spin_unlock_irqrestore(&mac->lock, flags);
+
+ /* Set basic rates */
+ need_set_rates = 1;
+ if (bssinfo->supported_rates.count == 0) {
+ /* Allow the device to be flexible */
+ basic_rates = CR_RATES_80211B | CR_RATES_80211G;
+ } else {
+ int i = 0;
+ basic_rates = 0;
+
+ for (i = 0; i < bssinfo->supported_rates.count; i++) {
+ u16 rate = bssinfo->supported_rates.rates[i];
+ if ((rate & IEEE80211_BASIC_RATE_MASK) == 0)
+ continue;
+
+ rate &= ~IEEE80211_BASIC_RATE_MASK;
+ basic_rates |= rate_to_cr_rate(rate);
+ }
+ }
+ spin_lock_irqsave(&mac->lock, flags);
+ mac->basic_rates = basic_rates;
+ spin_unlock_irqrestore(&mac->lock, flags);
+ }
+
+ /* Schedule any changes we made above */
+
+ spin_lock_irqsave(&mac->lock, flags);
+ if (need_set_rts_cts && !mac->updating_rts_rate) {
+ mac->updating_rts_rate = 1;
+ netif_stop_queue(mac->netdev);
+ queue_delayed_work(zd_workqueue, &mac->set_rts_cts_work, 0);
+ }
+ if (need_set_rates && !mac->updating_basic_rates) {
+ mac->updating_basic_rates = 1;
+ netif_stop_queue(mac->netdev);
+ queue_delayed_work(zd_workqueue, &mac->set_basic_rates_work,
+ 0);
+ }
+ spin_unlock_irqrestore(&mac->lock, flags);
+}
+