iwlwifi: add BT notification support for bt coex

When advanced bt coex enabled, uCode will send bt status
notification to driver, here add support for it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 171 insertions, 1 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-6000.c b/drivers/net/wireless/iwlwifi/iwl-6000.c
index fc2eeb00c78c..f049ebc4a6aa 100644
--- a/drivers/net/wireless/iwlwifi/iwl-6000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-6000.c
@@ -377,6 +377,90 @@ static int iwl6000_hw_channel_switch(struct iwl_priv *priv,
         return iwl_send_cmd_sync(priv, &hcmd);
 }
 
+static void iwl6000g2b_bt_traffic_change_work(struct work_struct *work)
+{
+        struct iwl_priv *priv =
+                container_of(work, struct iwl_priv, bt_traffic_change_work);
+        int smps_request = -1;
+
+        switch (priv->bt_traffic_load) {
+        case IWL_BT_COEX_TRAFFIC_LOAD_NONE:
+                smps_request = IEEE80211_SMPS_AUTOMATIC;
+                break;
+        case IWL_BT_COEX_TRAFFIC_LOAD_LOW:
+                smps_request = IEEE80211_SMPS_DYNAMIC;
+                break;
+        case IWL_BT_COEX_TRAFFIC_LOAD_HIGH:
+        case IWL_BT_COEX_TRAFFIC_LOAD_CONTINUOUS:
+                smps_request = IEEE80211_SMPS_STATIC;
+                break;
+        default:
+                IWL_ERR(priv, "Invalid BT traffic load: %d\n",
+                        priv->bt_traffic_load);
+                break;
+        }
+
+        mutex_lock(&priv->mutex);
+
+        if (smps_request != -1 &&
+            priv->vif && priv->vif->type == NL80211_IFTYPE_STATION)
+                ieee80211_request_smps(priv->vif, smps_request);
+
+        mutex_unlock(&priv->mutex);
+}
+
+static void iwl6000g2b_bt_coex_profile_notif(struct iwl_priv *priv,
+                                             struct iwl_rx_mem_buffer *rxb)
+{
+        struct iwl_rx_packet *pkt = rxb_addr(rxb);
+        struct iwl_bt_coex_profile_notif *coex = &pkt->u.bt_coex_profile_notif;
+        struct iwl6000g2b_bt_sco_cmd sco_cmd = { .flags = 0 };
+
+        IWL_DEBUG_NOTIF(priv, "BT Coex notification:\n");
+        IWL_DEBUG_NOTIF(priv, "    status: %d\n", coex->bt_status);
+        IWL_DEBUG_NOTIF(priv, "    traffic load: %d\n", coex->bt_traffic_load);
+        IWL_DEBUG_NOTIF(priv, "    CI compliance: %d\n", coex->bt_ci_compliance);
+        IWL_DEBUG_NOTIF(priv, "    UART msg: %.2x:%.2x:%.2x:%.2x:%.2x:%.2x:"
+                              "%.2x:%.2x\n",
+                        coex->uart_msg[0], coex->uart_msg[1], coex->uart_msg[2],
+                        coex->uart_msg[3], coex->uart_msg[4], coex->uart_msg[5],
+                        coex->uart_msg[6], coex->uart_msg[7]);
+
+        if (coex->bt_traffic_load != priv->bt_traffic_load) {
+                priv->bt_traffic_load = coex->bt_traffic_load;
+
+                queue_work(priv->workqueue, &priv->bt_traffic_change_work);
+        }
+
+        /* FIXME: add defines for this check */
+        priv->bt_sco_active = coex->uart_msg[3] & 1;
+        if (priv->bt_sco_active)
+                sco_cmd.flags |= IWL6000G2B_BT_SCO_ACTIVE;
+        iwl_send_cmd_pdu_async(priv, REPLY_BT_COEX_SCO,
+                               sizeof(sco_cmd), &sco_cmd, NULL);
+}
+
+void iwl6000g2b_rx_handler_setup(struct iwl_priv *priv)
+{
+        iwlagn_rx_handler_setup(priv);
+        priv->rx_handlers[REPLY_BT_COEX_PROFILE_NOTIF] =
+                iwl6000g2b_bt_coex_profile_notif;
+}
+
+static void iwl6000g2b_bt_setup_deferred_work(struct iwl_priv *priv)
+{
+        iwlagn_setup_deferred_work(priv);
+
+        INIT_WORK(&priv->bt_traffic_change_work,
+                  iwl6000g2b_bt_traffic_change_work);
+
+}
+
+static void iwl6000g2b_bt_cancel_deferred_work(struct iwl_priv *priv)
+{
+        cancel_work_sync(&priv->bt_traffic_change_work);
+}
+
 static struct iwl_lib_ops iwl6000_lib = {
         .set_hw_params = iwl6000_hw_set_hw_params,
         .txq_update_byte_cnt_tbl = iwlagn_txq_update_byte_cnt_tbl,
@@ -451,6 +535,81 @@ static struct iwl_lib_ops iwl6000_lib = {
         }
 };
 
+static struct iwl_lib_ops iwl6000g2b_lib = {
+        .set_hw_params = iwl6000_hw_set_hw_params,
+        .txq_update_byte_cnt_tbl = iwlagn_txq_update_byte_cnt_tbl,
+        .txq_inval_byte_cnt_tbl = iwlagn_txq_inval_byte_cnt_tbl,
+        .txq_set_sched = iwlagn_txq_set_sched,
+        .txq_agg_enable = iwlagn_txq_agg_enable,
+        .txq_agg_disable = iwlagn_txq_agg_disable,
+        .txq_attach_buf_to_tfd = iwl_hw_txq_attach_buf_to_tfd,
+        .txq_free_tfd = iwl_hw_txq_free_tfd,
+        .txq_init = iwl_hw_tx_queue_init,
+        .rx_handler_setup = iwl6000g2b_rx_handler_setup,
+        .setup_deferred_work = iwl6000g2b_bt_setup_deferred_work,
+        .cancel_deferred_work = iwl6000g2b_bt_cancel_deferred_work,
+        .is_valid_rtc_data_addr = iwlagn_hw_valid_rtc_data_addr,
+        .load_ucode = iwlagn_load_ucode,
+        .dump_nic_event_log = iwl_dump_nic_event_log,
+        .dump_nic_error_log = iwl_dump_nic_error_log,
+        .dump_csr = iwl_dump_csr,
+        .dump_fh = iwl_dump_fh,
+        .init_alive_start = iwlagn_init_alive_start,
+        .alive_notify = iwlagn_alive_notify,
+        .send_tx_power = iwlagn_send_tx_power,
+        .update_chain_flags = iwl_update_chain_flags,
+        .set_channel_switch = iwl6000_hw_channel_switch,
+        .apm_ops = {
+                .init = iwl_apm_init,
+                .stop = iwl_apm_stop,
+                .config = iwl6000_nic_config,
+                .set_pwr_src = iwl_set_pwr_src,
+        },
+        .eeprom_ops = {
+                .regulatory_bands = {
+                        EEPROM_REG_BAND_1_CHANNELS,
+                        EEPROM_REG_BAND_2_CHANNELS,
+                        EEPROM_REG_BAND_3_CHANNELS,
+                        EEPROM_REG_BAND_4_CHANNELS,
+                        EEPROM_REG_BAND_5_CHANNELS,
+                        EEPROM_6000_REG_BAND_24_HT40_CHANNELS,
+                        EEPROM_REG_BAND_52_HT40_CHANNELS
+                },
+                .verify_signature  = iwlcore_eeprom_verify_signature,
+                .acquire_semaphore = iwlcore_eeprom_acquire_semaphore,
+                .release_semaphore = iwlcore_eeprom_release_semaphore,
+                .calib_version  = iwlagn_eeprom_calib_version,
+                .query_addr = iwlagn_eeprom_query_addr,
+                .update_enhanced_txpower = iwlcore_eeprom_enhanced_txpower,
+        },
+        .post_associate = iwl_post_associate,
+        .isr = iwl_isr_ict,
+        .config_ap = iwl_config_ap,
+        .temp_ops = {
+                .temperature = iwlagn_temperature,
+                .set_ct_kill = iwl6000_set_ct_threshold,
+                .set_calib_version = iwl6000_set_calib_version,
+         },
+        .manage_ibss_station = iwlagn_manage_ibss_station,
+        .update_bcast_station = iwl_update_bcast_station,
+        .debugfs_ops = {
+                .rx_stats_read = iwl_ucode_rx_stats_read,
+                .tx_stats_read = iwl_ucode_tx_stats_read,
+                .general_stats_read = iwl_ucode_general_stats_read,
+                .bt_stats_read = iwl_ucode_bt_stats_read,
+        },
+        .recover_from_tx_stall = iwl_bg_monitor_recover,
+        .check_plcp_health = iwl_good_plcp_health,
+        .check_ack_health = iwl_good_ack_health,
+        .txfifo_flush = iwlagn_txfifo_flush,
+        .dev_txfifo_flush = iwlagn_dev_txfifo_flush,
+        .tt_ops = {
+                .lower_power_detection = iwl_tt_is_low_power_state,
+                .tt_power_mode = iwl_tt_current_power_mode,
+                .ct_kill_check = iwl_check_for_ct_kill,
+        }
+};
+
 static const struct iwl_ops iwl6000_ops = {
         .lib = &iwl6000_lib,
         .hcmd = &iwlagn_hcmd,
@@ -467,7 +626,7 @@ static struct iwl_hcmd_ops iwl6000g2b_hcmd = {
 };
 
 static const struct iwl_ops iwl6000g2b_ops = {
-        .lib = &iwl6000_lib,
+        .lib = &iwl6000g2b_lib,
         .hcmd = &iwl6000g2b_hcmd,
         .utils = &iwlagn_hcmd_utils,
         .led = &iwlagn_led_ops,
diff --git a/drivers/net/wireless/iwlwifi/iwl-commands.h b/drivers/net/wireless/iwlwifi/iwl-commands.h
index 69fc7745edaa..67eaeb6822cb 100644
--- a/drivers/net/wireless/iwlwifi/iwl-commands.h
+++ b/drivers/net/wireless/iwlwifi/iwl-commands.h
@@ -178,6 +178,7 @@ enum {
         REPLY_BT_COEX_PRIO_TABLE = 0xcc,
         REPLY_BT_COEX_PROT_ENV = 0xcd,
         REPLY_BT_COEX_PROFILE_NOTIF = 0xce,
+        REPLY_BT_COEX_SCO = 0xcf,
 
         REPLY_MAX = 0xff
 };
@@ -2456,6 +2457,12 @@ struct iwl6000g2b_bt_cmd {
         u8 reserved[3];
 };
 
+#define IWL6000G2B_BT_SCO_ACTIVE        cpu_to_le32(BIT(0))
+
+struct iwl6000g2b_bt_sco_cmd {
+        __le32 flags;
+};
+
 /******************************************************************************
  * (6)
  * Spectrum Management (802.11h) Commands, Responses, Notifications:
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 1ad330342ffc..5d327b44533b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -1362,6 +1362,10 @@ struct iwl_priv {
 #endif
         };
 
+        u8 bt_traffic_load;
+        bool bt_sco_active;
+        struct work_struct bt_traffic_change_work;
+
         struct iwl_hw_params hw_params;
 
         u32 inta_mask;