273 строки
8.8 KiB
C
273 строки
8.8 KiB
C
/******************************************************************************
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include "iwl-dev.h"
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#include "iwl-core.h"
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#include "iwl-io.h"
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#include "iwl-agn.h"
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static int iwlagn_send_rxon_assoc(struct iwl_priv *priv)
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{
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int ret = 0;
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struct iwl5000_rxon_assoc_cmd rxon_assoc;
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const struct iwl_rxon_cmd *rxon1 = &priv->staging_rxon;
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const struct iwl_rxon_cmd *rxon2 = &priv->active_rxon;
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if ((rxon1->flags == rxon2->flags) &&
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(rxon1->filter_flags == rxon2->filter_flags) &&
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(rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
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(rxon1->ofdm_ht_single_stream_basic_rates ==
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rxon2->ofdm_ht_single_stream_basic_rates) &&
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(rxon1->ofdm_ht_dual_stream_basic_rates ==
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rxon2->ofdm_ht_dual_stream_basic_rates) &&
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(rxon1->ofdm_ht_triple_stream_basic_rates ==
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rxon2->ofdm_ht_triple_stream_basic_rates) &&
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(rxon1->acquisition_data == rxon2->acquisition_data) &&
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(rxon1->rx_chain == rxon2->rx_chain) &&
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(rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
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IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
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return 0;
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}
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rxon_assoc.flags = priv->staging_rxon.flags;
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rxon_assoc.filter_flags = priv->staging_rxon.filter_flags;
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rxon_assoc.ofdm_basic_rates = priv->staging_rxon.ofdm_basic_rates;
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rxon_assoc.cck_basic_rates = priv->staging_rxon.cck_basic_rates;
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rxon_assoc.reserved1 = 0;
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rxon_assoc.reserved2 = 0;
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rxon_assoc.reserved3 = 0;
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rxon_assoc.ofdm_ht_single_stream_basic_rates =
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priv->staging_rxon.ofdm_ht_single_stream_basic_rates;
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rxon_assoc.ofdm_ht_dual_stream_basic_rates =
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priv->staging_rxon.ofdm_ht_dual_stream_basic_rates;
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rxon_assoc.rx_chain_select_flags = priv->staging_rxon.rx_chain;
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rxon_assoc.ofdm_ht_triple_stream_basic_rates =
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priv->staging_rxon.ofdm_ht_triple_stream_basic_rates;
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rxon_assoc.acquisition_data = priv->staging_rxon.acquisition_data;
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ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
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sizeof(rxon_assoc), &rxon_assoc, NULL);
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if (ret)
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return ret;
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return ret;
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}
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static int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
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{
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struct iwl_tx_ant_config_cmd tx_ant_cmd = {
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.valid = cpu_to_le32(valid_tx_ant),
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};
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if (IWL_UCODE_API(priv->ucode_ver) > 1) {
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IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
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return iwl_send_cmd_pdu(priv, TX_ANT_CONFIGURATION_CMD,
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sizeof(struct iwl_tx_ant_config_cmd),
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&tx_ant_cmd);
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} else {
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IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
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return -EOPNOTSUPP;
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}
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}
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/* Currently this is the superset of everything */
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static u16 iwlagn_get_hcmd_size(u8 cmd_id, u16 len)
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{
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return len;
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}
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static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
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{
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u16 size = (u16)sizeof(struct iwl_addsta_cmd);
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struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data;
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memcpy(addsta, cmd, size);
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/* resrved in 5000 */
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addsta->rate_n_flags = cpu_to_le16(0);
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return size;
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}
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static void iwlagn_gain_computation(struct iwl_priv *priv,
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u32 average_noise[NUM_RX_CHAINS],
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u16 min_average_noise_antenna_i,
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u32 min_average_noise,
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u8 default_chain)
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{
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int i;
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s32 delta_g;
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struct iwl_chain_noise_data *data = &priv->chain_noise_data;
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/*
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* Find Gain Code for the chains based on "default chain"
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*/
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for (i = default_chain + 1; i < NUM_RX_CHAINS; i++) {
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if ((data->disconn_array[i])) {
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data->delta_gain_code[i] = 0;
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continue;
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}
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delta_g = (priv->cfg->chain_noise_scale *
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((s32)average_noise[default_chain] -
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(s32)average_noise[i])) / 1500;
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/* bound gain by 2 bits value max, 3rd bit is sign */
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data->delta_gain_code[i] =
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min(abs(delta_g), (long) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
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if (delta_g < 0)
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/*
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* set negative sign ...
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* note to Intel developers: This is uCode API format,
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* not the format of any internal device registers.
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* Do not change this format for e.g. 6050 or similar
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* devices. Change format only if more resolution
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* (i.e. more than 2 bits magnitude) is needed.
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*/
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data->delta_gain_code[i] |= (1 << 2);
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}
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IWL_DEBUG_CALIB(priv, "Delta gains: ANT_B = %d ANT_C = %d\n",
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data->delta_gain_code[1], data->delta_gain_code[2]);
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if (!data->radio_write) {
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struct iwl_calib_chain_noise_gain_cmd cmd;
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memset(&cmd, 0, sizeof(cmd));
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cmd.hdr.op_code = IWL_PHY_CALIBRATE_CHAIN_NOISE_GAIN_CMD;
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cmd.hdr.first_group = 0;
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cmd.hdr.groups_num = 1;
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cmd.hdr.data_valid = 1;
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cmd.delta_gain_1 = data->delta_gain_code[1];
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cmd.delta_gain_2 = data->delta_gain_code[2];
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iwl_send_cmd_pdu_async(priv, REPLY_PHY_CALIBRATION_CMD,
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sizeof(cmd), &cmd, NULL);
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data->radio_write = 1;
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data->state = IWL_CHAIN_NOISE_CALIBRATED;
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}
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data->chain_noise_a = 0;
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data->chain_noise_b = 0;
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data->chain_noise_c = 0;
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data->chain_signal_a = 0;
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data->chain_signal_b = 0;
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data->chain_signal_c = 0;
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data->beacon_count = 0;
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}
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static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
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{
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struct iwl_chain_noise_data *data = &priv->chain_noise_data;
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int ret;
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if ((data->state == IWL_CHAIN_NOISE_ALIVE) && iwl_is_associated(priv)) {
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struct iwl_calib_chain_noise_reset_cmd cmd;
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memset(&cmd, 0, sizeof(cmd));
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cmd.hdr.op_code = IWL_PHY_CALIBRATE_CHAIN_NOISE_RESET_CMD;
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cmd.hdr.first_group = 0;
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cmd.hdr.groups_num = 1;
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cmd.hdr.data_valid = 1;
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ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
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sizeof(cmd), &cmd);
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if (ret)
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IWL_ERR(priv,
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"Could not send REPLY_PHY_CALIBRATION_CMD\n");
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data->state = IWL_CHAIN_NOISE_ACCUMULATE;
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IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
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}
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}
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static void iwlagn_rts_tx_cmd_flag(struct ieee80211_tx_info *info,
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__le32 *tx_flags)
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{
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*tx_flags |= TX_CMD_FLG_RTS_CTS_MSK;
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}
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/* Calc max signal level (dBm) among 3 possible receivers */
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static int iwlagn_calc_rssi(struct iwl_priv *priv,
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struct iwl_rx_phy_res *rx_resp)
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{
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/* data from PHY/DSP regarding signal strength, etc.,
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* contents are always there, not configurable by host
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*/
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struct iwl5000_non_cfg_phy *ncphy =
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(struct iwl5000_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
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u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
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u8 agc;
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val = le32_to_cpu(ncphy->non_cfg_phy[IWL50_RX_RES_AGC_IDX]);
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agc = (val & IWL50_OFDM_AGC_MSK) >> IWL50_OFDM_AGC_BIT_POS;
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/* Find max rssi among 3 possible receivers.
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* These values are measured by the digital signal processor (DSP).
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* They should stay fairly constant even as the signal strength varies,
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* if the radio's automatic gain control (AGC) is working right.
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* AGC value (see below) will provide the "interesting" info.
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*/
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val = le32_to_cpu(ncphy->non_cfg_phy[IWL50_RX_RES_RSSI_AB_IDX]);
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rssi_a = (val & IWL50_OFDM_RSSI_A_MSK) >> IWL50_OFDM_RSSI_A_BIT_POS;
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rssi_b = (val & IWL50_OFDM_RSSI_B_MSK) >> IWL50_OFDM_RSSI_B_BIT_POS;
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val = le32_to_cpu(ncphy->non_cfg_phy[IWL50_RX_RES_RSSI_C_IDX]);
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rssi_c = (val & IWL50_OFDM_RSSI_C_MSK) >> IWL50_OFDM_RSSI_C_BIT_POS;
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max_rssi = max_t(u32, rssi_a, rssi_b);
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max_rssi = max_t(u32, max_rssi, rssi_c);
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IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
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rssi_a, rssi_b, rssi_c, max_rssi, agc);
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/* dBm = max_rssi dB - agc dB - constant.
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* Higher AGC (higher radio gain) means lower signal. */
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return max_rssi - agc - IWLAGN_RSSI_OFFSET;
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}
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struct iwl_hcmd_ops iwlagn_hcmd = {
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.rxon_assoc = iwlagn_send_rxon_assoc,
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.commit_rxon = iwl_commit_rxon,
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.set_rxon_chain = iwl_set_rxon_chain,
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.set_tx_ant = iwlagn_send_tx_ant_config,
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.send_bt_config = iwl_send_bt_config,
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};
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struct iwl_hcmd_utils_ops iwlagn_hcmd_utils = {
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.get_hcmd_size = iwlagn_get_hcmd_size,
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.build_addsta_hcmd = iwlagn_build_addsta_hcmd,
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.gain_computation = iwlagn_gain_computation,
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.chain_noise_reset = iwlagn_chain_noise_reset,
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.rts_tx_cmd_flag = iwlagn_rts_tx_cmd_flag,
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.calc_rssi = iwlagn_calc_rssi,
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.request_scan = iwlagn_request_scan,
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};
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