1 files changed, 86 insertions, 2 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c b/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c
index dbada761624d..cf9194baadac 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c
@@ -433,7 +433,7 @@ static s8 iwl_update_channel_txpower(struct iwl_priv *priv,
 /**
  * iwlcore_eeprom_enhanced_txpower: process enhanced tx power info
  */
-void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
+static void iwlcore_eeprom_enhanced_txpower_old(struct iwl_priv *priv)
 {
         int eeprom_section_count = 0;
         int section, element;
@@ -460,7 +460,8 @@ void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
                  * always check for valid entry before process
                  * the information
                  */
-                if (!enhanced_txpower->common || enhanced_txpower->reserved)
+                if (!(enhanced_txpower->flags || enhanced_txpower->channel) ||
+                    enhanced_txpower->delta_20_in_40)
                         continue;
 
                 for (element = 0; element < eeprom_section_count; element++) {
@@ -493,3 +494,86 @@ void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
                 }
         }
 }
+
+static void
+iwlcore_eeprom_enh_txp_read_element(struct iwl_priv *priv,
+                                    struct iwl_eeprom_enhanced_txpwr *txp,
+                                    s8 max_txpower_avg)
+{
+        int ch_idx;
+        bool is_ht40 = txp->flags & IWL_EEPROM_ENH_TXP_FL_40MHZ;
+        enum ieee80211_band band;
+
+        band = txp->flags & IWL_EEPROM_ENH_TXP_FL_BAND_52G ?
+                IEEE80211_BAND_5GHZ : IEEE80211_BAND_2GHZ;
+
+        for (ch_idx = 0; ch_idx < priv->channel_count; ch_idx++) {
+                struct iwl_channel_info *ch_info = &priv->channel_info[ch_idx];
+
+                /* update matching channel or from common data only */
+                if (txp->channel != 0 && ch_info->channel != txp->channel)
+                        continue;
+
+                /* update matching band only */
+                if (band != ch_info->band)
+                        continue;
+
+                if (ch_info->max_power_avg < max_txpower_avg && !is_ht40) {
+                        ch_info->max_power_avg = max_txpower_avg;
+                        ch_info->curr_txpow = max_txpower_avg;
+                        ch_info->scan_power = max_txpower_avg;
+                }
+
+                if (is_ht40 && ch_info->ht40_max_power_avg < max_txpower_avg)
+                        ch_info->ht40_max_power_avg = max_txpower_avg;
+        }
+}
+
+#define EEPROM_TXP_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT)
+#define EEPROM_TXP_ENTRY_LEN sizeof(struct iwl_eeprom_enhanced_txpwr)
+#define EEPROM_TXP_SZ_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT_SIZE)
+
+static void iwlcore_eeprom_enhanced_txpower_new(struct iwl_priv *priv)
+{
+        struct iwl_eeprom_enhanced_txpwr *txp_array, *txp;
+        int idx, entries;
+        __le16 *txp_len;
+        s8 max_txp_avg, max_txp_avg_halfdbm;
+
+        BUILD_BUG_ON(sizeof(struct iwl_eeprom_enhanced_txpwr) != 8);
+
+        /* the length is in 16-bit words, but we want entries */
+        txp_len = (__le16 *) iwlagn_eeprom_query_addr(priv, EEPROM_TXP_SZ_OFFS);
+        entries = le16_to_cpup(txp_len) * 2 / EEPROM_TXP_ENTRY_LEN;
+
+        txp_array = (void *) iwlagn_eeprom_query_addr(priv, EEPROM_TXP_OFFS);
+        for (idx = 0; idx < entries; idx++) {
+                txp = &txp_array[idx];
+
+                /* skip invalid entries */
+                if (!(txp->flags & IWL_EEPROM_ENH_TXP_FL_VALID))
+                        continue;
+
+                max_txp_avg = iwl_get_max_txpower_avg(priv, txp_array, idx,
+                                                      &max_txp_avg_halfdbm);
+
+                /*
+                 * Update the user limit values values to the highest
+                 * power supported by any channel
+                 */
+                if (max_txp_avg > priv->tx_power_user_lmt)
+                        priv->tx_power_user_lmt = max_txp_avg;
+                if (max_txp_avg_halfdbm > priv->tx_power_lmt_in_half_dbm)
+                        priv->tx_power_lmt_in_half_dbm = max_txp_avg_halfdbm;
+
+                iwlcore_eeprom_enh_txp_read_element(priv, txp, max_txp_avg);
+        }
+}
+
+void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
+{
+        if (priv->cfg->use_new_eeprom_reading)
+                iwlcore_eeprom_enhanced_txpower_new(priv);
+        else
+                iwlcore_eeprom_enhanced_txpower_old(priv);
+}