[PATCH] rt2x00: Reorganize configuration handler

Reorganize configuration handling by creating a extra
structure which contains precalculated values based
on the mac80211 values which are usefull for all
individual drivers.

This also fixes the preamble configuration problem,
up untill now preamble was never configured since
by default the rate->val value was used when changing
the mode.
Now rate->val will only be used to set the basic rate mask.
The preamble configuration will now be done correctly
through the erp_ie_changed callback function.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 45 insertions, 67 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c
index ef8dffbdffed..45f8f744a12d 100644
--- a/drivers/net/wireless/rt2x00/rt2500usb.c
+++ b/drivers/net/wireless/rt2x00/rt2500usb.c
@@ -302,54 +302,39 @@ static void rt2500usb_config_type(struct rt2x00_dev *rt2x00dev, const int type,
 	rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
 }
 
-static void rt2500usb_config_rate(struct rt2x00_dev *rt2x00dev, const int rate)
+static void rt2500usb_config_preamble(struct rt2x00_dev *rt2x00dev,
+				      const int short_preamble,
+				      const int ack_timeout,
+				      const int ack_consume_time)
 {
-	struct ieee80211_conf *conf = &rt2x00dev->hw->conf;
 	u16 reg;
-	u16 value;
-	u16 preamble;
-
-	if (DEVICE_GET_RATE_FIELD(rate, PREAMBLE))
-		preamble = SHORT_PREAMBLE;
-	else
-		preamble = PREAMBLE;
 
-	reg = DEVICE_GET_RATE_FIELD(rate, RATEMASK) & DEV_BASIC_RATEMASK;
-
-	rt2500usb_register_write(rt2x00dev, TXRX_CSR11, reg);
+	/*
+	 * When in atomic context, reschedule and let rt2x00lib
+	 * call this function again.
+	 */
+	if (in_atomic()) {
+		queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->config_work);
+		return;
+	}
 
 	rt2500usb_register_read(rt2x00dev, TXRX_CSR1, &reg);
-	value = ((conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME) ?
-		 SHORT_DIFS : DIFS) +
-	    PLCP + preamble + get_duration(ACK_SIZE, 10);
-	rt2x00_set_field16(&reg, TXRX_CSR1_ACK_TIMEOUT, value);
+	rt2x00_set_field16(&reg, TXRX_CSR1_ACK_TIMEOUT, ack_timeout);
 	rt2500usb_register_write(rt2x00dev, TXRX_CSR1, reg);
 
 	rt2500usb_register_read(rt2x00dev, TXRX_CSR10, &reg);
 	rt2x00_set_field16(&reg, TXRX_CSR10_AUTORESPOND_PREAMBLE,
-			   (preamble == SHORT_PREAMBLE));
+			   !!short_preamble);
 	rt2500usb_register_write(rt2x00dev, TXRX_CSR10, reg);
 }
 
 static void rt2500usb_config_phymode(struct rt2x00_dev *rt2x00dev,
-				     const int phymode)
+				     const int phymode,
+				     const int basic_rate_mask)
 {
-	struct ieee80211_hw_mode *mode;
-	struct ieee80211_rate *rate;
+	rt2500usb_register_write(rt2x00dev, TXRX_CSR11, basic_rate_mask);
 
-	if (phymode == MODE_IEEE80211A)
-		rt2x00dev->curr_hwmode = HWMODE_A;
-	else if (phymode == MODE_IEEE80211B)
-		rt2x00dev->curr_hwmode = HWMODE_B;
-	else
-		rt2x00dev->curr_hwmode = HWMODE_G;
-
-	mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
-	rate = &mode->rates[mode->num_rates - 1];
-
-	rt2500usb_config_rate(rt2x00dev, rate->val2);
-
-	if (phymode == MODE_IEEE80211B) {
+	if (phymode == HWMODE_B) {
 		rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x000b);
 		rt2500usb_register_write(rt2x00dev, MAC_CSR12, 0x0040);
 	} else {
@@ -359,20 +344,12 @@ static void rt2500usb_config_phymode(struct rt2x00_dev *rt2x00dev,
 }
 
 static void rt2500usb_config_channel(struct rt2x00_dev *rt2x00dev,
-				     const int index, const int channel,
-				     const int txpower)
+				     struct rf_channel *rf, const int txpower)
 {
-	struct rf_channel reg;
-
-	/*
-	 * Fill rf_reg structure.
-	 */
-	memcpy(&reg, &rt2x00dev->spec.channels[index], sizeof(reg));
-
 	/*
 	 * Set TXpower.
 	 */
-	rt2x00_set_field32(&reg.rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
+	rt2x00_set_field32(&rf->rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
 
 	/*
 	 * For RT2525E we should first set the channel to half band higher.
@@ -385,16 +362,16 @@ static void rt2500usb_config_channel(struct rt2x00_dev *rt2x00dev,
 			0x00000902, 0x00000906
 		};
 
-		rt2500usb_rf_write(rt2x00dev, 2, vals[channel - 1]);
-		if (reg.rf4)
-			rt2500usb_rf_write(rt2x00dev, 4, reg.rf4);
+		rt2500usb_rf_write(rt2x00dev, 2, vals[rf->channel - 1]);
+		if (rf->rf4)
+			rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
 	}
 
-	rt2500usb_rf_write(rt2x00dev, 1, reg.rf1);
-	rt2500usb_rf_write(rt2x00dev, 2, reg.rf2);
-	rt2500usb_rf_write(rt2x00dev, 3, reg.rf3);
-	if (reg.rf4)
-		rt2500usb_rf_write(rt2x00dev, 4, reg.rf4);
+	rt2500usb_rf_write(rt2x00dev, 1, rf->rf1);
+	rt2500usb_rf_write(rt2x00dev, 2, rf->rf2);
+	rt2500usb_rf_write(rt2x00dev, 3, rf->rf3);
+	if (rf->rf4)
+		rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
 }
 
 static void rt2500usb_config_txpower(struct rt2x00_dev *rt2x00dev,
@@ -484,38 +461,37 @@ static void rt2500usb_config_antenna(struct rt2x00_dev *rt2x00dev,
 }
 
 static void rt2500usb_config_duration(struct rt2x00_dev *rt2x00dev,
-				      const int short_slot_time,
-				      const int beacon_int)
+				      struct rt2x00lib_conf *libconf)
 {
 	u16 reg;
 
-	rt2500usb_register_write(rt2x00dev, MAC_CSR10,
-				 short_slot_time ? SHORT_SLOT_TIME : SLOT_TIME);
+	rt2500usb_register_write(rt2x00dev, MAC_CSR10, libconf->slot_time);
 
 	rt2500usb_register_read(rt2x00dev, TXRX_CSR18, &reg);
-	rt2x00_set_field16(&reg, TXRX_CSR18_INTERVAL, beacon_int * 4);
+	rt2x00_set_field16(&reg, TXRX_CSR18_INTERVAL,
+			   libconf->conf->beacon_int * 4);
 	rt2500usb_register_write(rt2x00dev, TXRX_CSR18, reg);
 }
 
 static void rt2500usb_config(struct rt2x00_dev *rt2x00dev,
 			     const unsigned int flags,
-			     struct ieee80211_conf *conf)
+			     struct rt2x00lib_conf *libconf)
 {
-	int short_slot_time = conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME;
-
 	if (flags & CONFIG_UPDATE_PHYMODE)
-		rt2500usb_config_phymode(rt2x00dev, conf->phymode);
+		rt2500usb_config_phymode(rt2x00dev, libconf->phymode,
+					 libconf->basic_rates);
 	if (flags & CONFIG_UPDATE_CHANNEL)
-		rt2500usb_config_channel(rt2x00dev, conf->channel_val,
-					 conf->channel, conf->power_level);
+		rt2500usb_config_channel(rt2x00dev, &libconf->rf,
+					 libconf->conf->power_level);
 	if ((flags & CONFIG_UPDATE_TXPOWER) && !(flags & CONFIG_UPDATE_CHANNEL))
-		rt2500usb_config_txpower(rt2x00dev, conf->power_level);
+		rt2500usb_config_txpower(rt2x00dev,
+					 libconf->conf->power_level);
 	if (flags & CONFIG_UPDATE_ANTENNA)
-		rt2500usb_config_antenna(rt2x00dev, conf->antenna_sel_tx,
-					 conf->antenna_sel_rx);
+		rt2500usb_config_antenna(rt2x00dev,
+					 libconf->conf->antenna_sel_tx,
+					 libconf->conf->antenna_sel_rx);
 	if (flags & (CONFIG_UPDATE_SLOT_TIME | CONFIG_UPDATE_BEACON_INT))
-		rt2500usb_config_duration(rt2x00dev, short_slot_time,
-					  conf->beacon_int);
+		rt2500usb_config_duration(rt2x00dev, libconf);
 }
 
 /*
@@ -1733,6 +1709,7 @@ static const struct ieee80211_ops rt2500usb_mac80211_ops = {
 	.config_interface	= rt2x00mac_config_interface,
 	.configure_filter	= rt2500usb_configure_filter,
 	.get_stats		= rt2x00mac_get_stats,
+	.erp_ie_changed		= rt2x00mac_erp_ie_changed,
 	.conf_tx		= rt2x00mac_conf_tx,
 	.get_tx_stats		= rt2x00mac_get_tx_stats,
 	.beacon_update		= rt2500usb_beacon_update,
@@ -1754,6 +1731,7 @@ static const struct rt2x00lib_ops rt2500usb_rt2x00_ops = {
 	.config_mac_addr	= rt2500usb_config_mac_addr,
 	.config_bssid		= rt2500usb_config_bssid,
 	.config_type		= rt2500usb_config_type,
+	.config_preamble	= rt2500usb_config_preamble,
 	.config			= rt2500usb_config,
 };