/****************************************************************************** * * GPL LICENSE SUMMARY * * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, * USA * * The full GNU General Public License is included in this distribution * in the file called LICENSE.GPL. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * *****************************************************************************/ #include #include #include #include #include "iwl-dev.h" #include "iwl-core.h" #include "iwl-io.h" #include "iwl-agn.h" int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant) { struct iwl_tx_ant_config_cmd tx_ant_cmd = { .valid = cpu_to_le32(valid_tx_ant), }; if (IWL_UCODE_API(priv->ucode_ver) > 1) { IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant); return iwl_send_cmd_pdu(priv, TX_ANT_CONFIGURATION_CMD, sizeof(struct iwl_tx_ant_config_cmd), &tx_ant_cmd); } else { IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n"); return -EOPNOTSUPP; } } static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data) { u16 size = (u16)sizeof(struct iwl_addsta_cmd); struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data; memcpy(addsta, cmd, size); /* resrved in 5000 */ addsta->rate_n_flags = cpu_to_le16(0); return size; } static void iwlagn_gain_computation(struct iwl_priv *priv, u32 average_noise[NUM_RX_CHAINS], u16 min_average_noise_antenna_i, u32 min_average_noise, u8 default_chain) { int i; s32 delta_g; struct iwl_chain_noise_data *data = &priv->chain_noise_data; /* * Find Gain Code for the chains based on "default chain" */ for (i = default_chain + 1; i < NUM_RX_CHAINS; i++) { if ((data->disconn_array[i])) { data->delta_gain_code[i] = 0; continue; } delta_g = (priv->cfg->base_params->chain_noise_scale * ((s32)average_noise[default_chain] - (s32)average_noise[i])) / 1500; /* bound gain by 2 bits value max, 3rd bit is sign */ data->delta_gain_code[i] = min(abs(delta_g), (long) CHAIN_NOISE_MAX_DELTA_GAIN_CODE); if (delta_g < 0) /* * set negative sign ... * note to Intel developers: This is uCode API format, * not the format of any internal device registers. * Do not change this format for e.g. 6050 or similar * devices. Change format only if more resolution * (i.e. more than 2 bits magnitude) is needed. */ data->delta_gain_code[i] |= (1 << 2); } IWL_DEBUG_CALIB(priv, "Delta gains: ANT_B = %d ANT_C = %d\n", data->delta_gain_code[1], data->delta_gain_code[2]); if (!data->radio_write) { struct iwl_calib_chain_noise_gain_cmd cmd; memset(&cmd, 0, sizeof(cmd)); cmd.hdr.op_code = priv->_agn.phy_calib_chain_noise_gain_cmd; cmd.hdr.first_group = 0; cmd.hdr.groups_num = 1; cmd.hdr.data_valid = 1; cmd.delta_gain_1 = data->delta_gain_code[1]; cmd.delta_gain_2 = data->delta_gain_code[2]; iwl_send_cmd_pdu_async(priv, REPLY_PHY_CALIBRATION_CMD, sizeof(cmd), &cmd, NULL); data->radio_write = 1; data->state = IWL_CHAIN_NOISE_CALIBRATED; } } static void iwlagn_chain_noise_reset(struct iwl_priv *priv) { struct iwl_chain_noise_data *data = &priv->chain_noise_data; int ret; if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_any_associated(priv)) { struct iwl_calib_chain_noise_reset_cmd cmd; /* clear data for chain noise calibration algorithm */ data->chain_noise_a = 0; data->chain_noise_b = 0; data->chain_noise_c = 0; data->chain_signal_a = 0; data->chain_signal_b = 0; data->chain_signal_c = 0; data->beacon_count = 0; memset(&cmd, 0, sizeof(cmd)); cmd.hdr.op_code = priv->_agn.phy_calib_chain_noise_reset_cmd; cmd.hdr.first_group = 0; cmd.hdr.groups_num = 1; cmd.hdr.data_valid = 1; ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD, sizeof(cmd), &cmd); if (ret) IWL_ERR(priv, "Could not send REPLY_PHY_CALIBRATION_CMD\n"); data->state = IWL_CHAIN_NOISE_ACCUMULATE; IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n"); } } static void iwlagn_tx_cmd_protection(struct iwl_priv *priv, struct ieee80211_tx_info *info, __le16 fc, __le32 *tx_flags) { if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS || info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; return; } if (priv->cfg->ht_params && priv->cfg->ht_params->use_rts_for_aggregation && info->flags & IEEE80211_TX_CTL_AMPDU) { *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; return; } } /* Calc max signal level (dBm) among 3 possible receivers */ static int iwlagn_calc_rssi(struct iwl_priv *priv, struct iwl_rx_phy_res *rx_resp) { /* data from PHY/DSP regarding signal strength, etc., * contents are always there, not configurable by host */ struct iwlagn_non_cfg_phy *ncphy = (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf; u32 val, rssi_a, rssi_b, rssi_c, max_rssi; u8 agc; val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]); agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS; /* Find max rssi among 3 possible receivers. * These values are measured by the digital signal processor (DSP). * They should stay fairly constant even as the signal strength varies, * if the radio's automatic gain control (AGC) is working right. * AGC value (see below) will provide the "interesting" info. */ val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]); rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >> IWLAGN_OFDM_RSSI_A_BIT_POS; rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >> IWLAGN_OFDM_RSSI_B_BIT_POS; val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]); rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >> IWLAGN_OFDM_RSSI_C_BIT_POS; max_rssi = max_t(u32, rssi_a, rssi_b); max_rssi = max_t(u32, max_rssi, rssi_c); IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n", rssi_a, rssi_b, rssi_c, max_rssi, agc); /* dBm = max_rssi dB - agc dB - constant. * Higher AGC (higher radio gain) means lower signal. */ return max_rssi - agc - IWLAGN_RSSI_OFFSET; } static int iwlagn_set_pan_params(struct iwl_priv *priv) { struct iwl_wipan_params_cmd cmd; struct iwl_rxon_context *ctx_bss, *ctx_pan; int slot0 = 300, slot1 = 0; int ret; if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS)) return 0; BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2); lockdep_assert_held(&priv->mutex); ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS]; ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN]; /* * If the PAN context is inactive, then we don't need * to update the PAN parameters, the last thing we'll * have done before it goes inactive is making the PAN * parameters be WLAN-only. */ if (!ctx_pan->is_active) return 0; memset(&cmd, 0, sizeof(cmd)); /* only 2 slots are currently allowed */ cmd.num_slots = 2; cmd.slots[0].type = 0; /* BSS */ cmd.slots[1].type = 1; /* PAN */ if (priv->_agn.hw_roc_channel) { /* both contexts must be used for this to happen */ slot1 = priv->_agn.hw_roc_duration; slot0 = IWL_MIN_SLOT_TIME; } else if (ctx_bss->vif && ctx_pan->vif) { int bcnint = ctx_pan->vif->bss_conf.beacon_int; int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1; /* should be set, but seems unused?? */ cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE); if (ctx_pan->vif->type == NL80211_IFTYPE_AP && bcnint && bcnint != ctx_bss->vif->bss_conf.beacon_int) { IWL_ERR(priv, "beacon intervals don't match (%d, %d)\n", ctx_bss->vif->bss_conf.beacon_int, ctx_pan->vif->bss_conf.beacon_int); } else bcnint = max_t(int, bcnint, ctx_bss->vif->bss_conf.beacon_int); if (!bcnint) bcnint = DEFAULT_BEACON_INTERVAL; slot0 = bcnint / 2; slot1 = bcnint - slot0; if (test_bit(STATUS_SCAN_HW, &priv->status) || (!ctx_bss->vif->bss_conf.idle && !ctx_bss->vif->bss_conf.assoc)) { slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME; slot1 = IWL_MIN_SLOT_TIME; } else if (!ctx_pan->vif->bss_conf.idle && !ctx_pan->vif->bss_conf.assoc) { slot1 = bcnint * 3 - IWL_MIN_SLOT_TIME; slot0 = IWL_MIN_SLOT_TIME; } } else if (ctx_pan->vif) { slot0 = 0; slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) * ctx_pan->vif->bss_conf.beacon_int; slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1); if (test_bit(STATUS_SCAN_HW, &priv->status)) { slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME; slot1 = IWL_MIN_SLOT_TIME; } } cmd.slots[0].width = cpu_to_le16(slot0); cmd.slots[1].width = cpu_to_le16(slot1); ret = iwl_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, sizeof(cmd), &cmd); if (ret) IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret); return ret; } struct iwl_hcmd_ops iwlagn_hcmd = { .set_rxon_chain = iwlagn_set_rxon_chain, .set_tx_ant = iwlagn_send_tx_ant_config, .send_bt_config = iwl_send_bt_config, .set_pan_params = iwlagn_set_pan_params, }; struct iwl_hcmd_ops iwlagn_bt_hcmd = { .set_rxon_chain = iwlagn_set_rxon_chain, .set_tx_ant = iwlagn_send_tx_ant_config, .send_bt_config = iwlagn_send_advance_bt_config, .set_pan_params = iwlagn_set_pan_params, }; struct iwl_hcmd_utils_ops iwlagn_hcmd_utils = { .build_addsta_hcmd = iwlagn_build_addsta_hcmd, .gain_computation = iwlagn_gain_computation, .chain_noise_reset = iwlagn_chain_noise_reset, .tx_cmd_protection = iwlagn_tx_cmd_protection, .calc_rssi = iwlagn_calc_rssi, .request_scan = iwlagn_request_scan, };