| /****************************************************************************** |
| * |
| * 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 <ilw@linux.intel.com> |
| * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
| * |
| *****************************************************************************/ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/sched.h> |
| |
| #include "iwl-dev.h" |
| #include "iwl-core.h" |
| #include "iwl-io.h" |
| #include "iwl-agn.h" |
| #include "iwl-trans.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 trans_send_cmd_pdu(priv, |
| TX_ANT_CONFIGURATION_CMD, |
| CMD_SYNC, |
| 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)); |
| |
| iwl_set_calib_hdr(&cmd.hdr, |
| priv->_agn.phy_calib_chain_noise_gain_cmd); |
| cmd.delta_gain_1 = data->delta_gain_code[1]; |
| cmd.delta_gain_2 = data->delta_gain_code[2]; |
| trans_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD, |
| CMD_ASYNC, sizeof(cmd), &cmd); |
| |
| 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)); |
| iwl_set_calib_hdr(&cmd.hdr, |
| priv->_agn.phy_calib_chain_noise_reset_cmd); |
| ret = trans_send_cmd_pdu(priv, |
| REPLY_PHY_CALIBRATION_CMD, |
| CMD_SYNC, 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 || |
| info->flags & IEEE80211_TX_CTL_AMPDU) |
| *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK; |
| } |
| |
| /* 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; |
| } |
| |
| 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 = trans_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, CMD_SYNC, |
| sizeof(cmd), &cmd); |
| if (ret) |
| IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret); |
| |
| return ret; |
| } |
| |
| 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, |
| }; |