ath5k: Use helper function to get eeprom mode from channel

Introduce a helper function to get the EEPROM mode from channel and remove
multiple similar switch statements. Also since it's now easy to get the EEPROM
mode from the channel, use them inside the functions which need it, instead of
passing a redundant ee_mode parameter.
Signed-off-by: Bruno Randolf <br1@einfach.org>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath5k/ath5k.h

@@ -1318,7 +1318,7 @@ void ath5k_hw_set_antenna_switch(struct ath5k_hw *ah, u8 ee_mode);
 int ath5k_hw_set_txpower_limit(struct ath5k_hw *ah, u8 txpower);
 /* Init function */
 int ath5k_hw_phy_init(struct ath5k_hw *ah, struct ieee80211_channel *channel,
-				u8 mode, u8 ee_mode, bool fast);
+				u8 mode, bool fast);
 
 /*
  * Functions used internaly

drivers/net/wireless/ath/ath5k/eeprom.c

@@ -1802,3 +1802,19 @@ ath5k_eeprom_detach(struct ath5k_hw *ah)
 	for (mode = AR5K_EEPROM_MODE_11A; mode <= AR5K_EEPROM_MODE_11G; mode++)
 		ath5k_eeprom_free_pcal_info(ah, mode);
 }
+
+int
+ath5k_eeprom_mode_from_channel(struct ieee80211_channel *channel)
+{
+	switch (channel->hw_value & CHANNEL_MODES) {
+	case CHANNEL_A:
+	case CHANNEL_XR:
+		return AR5K_EEPROM_MODE_11A;
+	case CHANNEL_G:
+		return AR5K_EEPROM_MODE_11G;
+	case CHANNEL_B:
+		return AR5K_EEPROM_MODE_11B;
+	default:
+		return -1;
+	}
+}

drivers/net/wireless/ath/ath5k/eeprom.h

@@ -517,3 +517,5 @@ struct ath5k_eeprom_info {
 	u32	ee_antenna[AR5K_EEPROM_N_MODES][AR5K_ANT_MAX];
 };
 
+int
+ath5k_eeprom_mode_from_channel(struct ieee80211_channel *channel);

drivers/net/wireless/ath/ath5k/phy.c

@@ -1355,20 +1355,7 @@ void ath5k_hw_update_noise_floor(struct ath5k_hw *ah)
 		return;
 	}
 
-	switch (ah->ah_current_channel->hw_value & CHANNEL_MODES) {
-	case CHANNEL_A:
-	case CHANNEL_XR:
-		ee_mode = AR5K_EEPROM_MODE_11A;
-		break;
-	case CHANNEL_G:
-		ee_mode = AR5K_EEPROM_MODE_11G;
-		break;
-	default:
-	case CHANNEL_B:
-		ee_mode = AR5K_EEPROM_MODE_11B;
-		break;
-	}
-
+	ee_mode = ath5k_eeprom_mode_from_channel(ah->ah_current_channel);
 
 	/* completed NF calibration, test threshold */
 	nf = ath5k_hw_read_measured_noise_floor(ah);
@@ -1941,18 +1928,8 @@ ath5k_hw_set_antenna_mode(struct ath5k_hw *ah, u8 ant_mode)
 
 	def_ant = ah->ah_def_ant;
 
-	switch (channel->hw_value & CHANNEL_MODES) {
-	case CHANNEL_A:
-	case CHANNEL_XR:
-		ee_mode = AR5K_EEPROM_MODE_11A;
-		break;
-	case CHANNEL_G:
-		ee_mode = AR5K_EEPROM_MODE_11G;
-		break;
-	case CHANNEL_B:
-		ee_mode = AR5K_EEPROM_MODE_11B;
-		break;
-	default:
+	ee_mode = ath5k_eeprom_mode_from_channel(channel);
+	if (ee_mode < 0) {
 		ATH5K_ERR(ah->ah_sc,
 			"invalid channel: %d\n", channel->center_freq);
 		return;
@@ -3100,11 +3077,11 @@ ath5k_setup_rate_powertable(struct ath5k_hw *ah, u16 max_pwr,
  */
 static int
 ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel,
-		u8 ee_mode, u8 txpower)
+		 u8 txpower)
 {
 	struct ath5k_rate_pcal_info rate_info;
 	struct ieee80211_channel *curr_channel = ah->ah_current_channel;
-	u8 type;
+	u8 type, ee_mode;
 	int ret;
 
 	if (txpower > AR5K_TUNE_MAX_TXPOWER) {
@@ -3112,6 +3089,13 @@ ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel,
 		return -EINVAL;
 	}
 
+	ee_mode = ath5k_eeprom_mode_from_channel(channel);
+	if (ee_mode < 0) {
+		ATH5K_ERR(ah->ah_sc,
+			"invalid channel: %d\n", channel->center_freq);
+		return -EINVAL;
+	}
+
 	/* Initialize TX power table */
 	switch (ah->ah_radio) {
 	case AR5K_RF5110:
@@ -3208,31 +3192,10 @@ ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel,
 
 int ath5k_hw_set_txpower_limit(struct ath5k_hw *ah, u8 txpower)
 {
-	/*Just a try M.F.*/
-	struct ieee80211_channel *channel = ah->ah_current_channel;
-	u8 ee_mode;
-
-	switch (channel->hw_value & CHANNEL_MODES) {
-	case CHANNEL_A:
-	case CHANNEL_XR:
-		ee_mode = AR5K_EEPROM_MODE_11A;
-		break;
-	case CHANNEL_G:
-		ee_mode = AR5K_EEPROM_MODE_11G;
-		break;
-	case CHANNEL_B:
-		ee_mode = AR5K_EEPROM_MODE_11B;
-		break;
-	default:
-		ATH5K_ERR(ah->ah_sc,
-			"invalid channel: %d\n", channel->center_freq);
-		return -EINVAL;
-	}
-
 	ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_TXPOWER,
 		"changing txpower to %d\n", txpower);
 
-	return ath5k_hw_txpower(ah, channel, ee_mode, txpower);
+	return ath5k_hw_txpower(ah, ah->ah_current_channel, txpower);
 }
 
 /*************\
@@ -3240,7 +3203,7 @@ int ath5k_hw_set_txpower_limit(struct ath5k_hw *ah, u8 txpower)
 \*************/
 
 int ath5k_hw_phy_init(struct ath5k_hw *ah, struct ieee80211_channel *channel,
-				u8 mode, u8 ee_mode, bool fast)
+		      u8 mode, bool fast)
 {
 	struct ieee80211_channel *curr_channel;
 	int ret, i;
@@ -3281,8 +3244,7 @@ int ath5k_hw_phy_init(struct ath5k_hw *ah, struct ieee80211_channel *channel,
 	 * RF buffer settings on 5211/5212+ so that we
 	 * properly set curve indices.
 	 */
-	ret = ath5k_hw_txpower(ah, channel, ee_mode,
-		ah->ah_txpower.txp_cur_pwr ?
+	ret = ath5k_hw_txpower(ah, channel, ah->ah_txpower.txp_cur_pwr ?
 			ah->ah_txpower.txp_cur_pwr / 2 : AR5K_TUNE_MAX_TXPOWER);
 	if (ret)
 		return ret;

drivers/net/wireless/ath/ath5k/reset.c

@@ -866,15 +866,18 @@ static void ath5k_hw_tweak_initval_settings(struct ath5k_hw *ah,
 }
 
 static void ath5k_hw_commit_eeprom_settings(struct ath5k_hw *ah,
-		struct ieee80211_channel *channel, u8 ee_mode)
+		struct ieee80211_channel *channel)
 {
 	struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
 	s16 cck_ofdm_pwr_delta;
+	u8 ee_mode;
 
 	/* TODO: Add support for AR5210 EEPROM */
 	if (ah->ah_version == AR5K_AR5210)
 		return;
 
+	ee_mode = ath5k_eeprom_mode_from_channel(channel);
+
 	/* Adjust power delta for channel 14 */
 	if (channel->center_freq == 2484)
 		cck_ofdm_pwr_delta =
@@ -1020,10 +1023,9 @@ int ath5k_hw_reset(struct ath5k_hw *ah, enum nl80211_iftype op_mode,
 		struct ieee80211_channel *channel, bool fast, bool skip_pcu)
 {
 	u32 s_seq[10], s_led[3], tsf_up, tsf_lo;
-	u8 mode, ee_mode;
+	u8 mode;
 	int i, ret;
 
-	ee_mode = 0;
 	tsf_up = 0;
 	tsf_lo = 0;
 	mode = 0;
@@ -1070,7 +1072,6 @@ int ath5k_hw_reset(struct ath5k_hw *ah, enum nl80211_iftype op_mode,
 	switch (channel->hw_value & CHANNEL_MODES) {
 	case CHANNEL_A:
 		mode = AR5K_MODE_11A;
-		ee_mode = AR5K_EEPROM_MODE_11A;
 		break;
 	case CHANNEL_G:
 
@@ -1081,7 +1082,6 @@ int ath5k_hw_reset(struct ath5k_hw *ah, enum nl80211_iftype op_mode,
 		}
 
 		mode = AR5K_MODE_11G;
-		ee_mode = AR5K_EEPROM_MODE_11G;
 		break;
 	case CHANNEL_B:
 
@@ -1092,7 +1092,6 @@ int ath5k_hw_reset(struct ath5k_hw *ah, enum nl80211_iftype op_mode,
 		}
 
 		mode = AR5K_MODE_11B;
-		ee_mode = AR5K_EEPROM_MODE_11B;
 		break;
 	case CHANNEL_XR:
 		if (ah->ah_version == AR5K_AR5211) {
@@ -1101,7 +1100,6 @@ int ath5k_hw_reset(struct ath5k_hw *ah, enum nl80211_iftype op_mode,
 			return -EINVAL;
 		}
 		mode = AR5K_MODE_XR;
-		ee_mode = AR5K_EEPROM_MODE_11A;
 		break;
 	default:
 		ATH5K_ERR(ah->ah_sc,
@@ -1114,8 +1112,7 @@ int ath5k_hw_reset(struct ath5k_hw *ah, enum nl80211_iftype op_mode,
 	 * go on. If it fails continue with a normal reset.
 	 */
 	if (fast) {
-		ret = ath5k_hw_phy_init(ah, channel, mode,
-					ee_mode, true);
+		ret = ath5k_hw_phy_init(ah, channel, mode, true);
 		if (ret) {
 			ATH5K_DBG(ah->ah_sc, ATH5K_DEBUG_RESET,
 				"fast chan change failed, falling back to normal reset\n");
@@ -1212,7 +1209,7 @@ int ath5k_hw_reset(struct ath5k_hw *ah, enum nl80211_iftype op_mode,
 	ath5k_hw_tweak_initval_settings(ah, channel);
 
 	/* Commit values from EEPROM */
-	ath5k_hw_commit_eeprom_settings(ah, channel, ee_mode);
+	ath5k_hw_commit_eeprom_settings(ah, channel);
 
 
 	/*
@@ -1251,7 +1248,7 @@ int ath5k_hw_reset(struct ath5k_hw *ah, enum nl80211_iftype op_mode,
 	/*
 	 * Initialize PHY
 	 */
-	ret = ath5k_hw_phy_init(ah, channel, mode, ee_mode, false);
+	ret = ath5k_hw_phy_init(ah, channel, mode, false);
 	if (ret) {
 		ATH5K_ERR(ah->ah_sc,
 			"failed to initialize PHY (%i) !\n", ret);