drivers/net/wireless/iwlwifi/iwl-agn-hcmd.c

   1 /******************************************************************************
   2  *
   3  * GPL LICENSE SUMMARY
   4  *
   5  * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of version 2 of the GNU General Public License as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  19  * USA
  20  *
  21  * The full GNU General Public License is included in this distribution
  22  * in the file called LICENSE.GPL.
  23  *
  24  * Contact Information:
  25  *  Intel Linux Wireless <ilw@linux.intel.com>
  26  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  27  *
  28  *****************************************************************************/
  29
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/sched.h>
  34
  35 #include "iwl-dev.h"
  36 #include "iwl-core.h"
  37 #include "iwl-io.h"
  38 #include "iwl-agn.h"
  39
  40 int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
  41                            struct iwl_rxon_context *ctx)
  42 {
  43         int ret = 0;
  44         struct iwl5000_rxon_assoc_cmd rxon_assoc;
  45         const struct iwl_rxon_cmd *rxon1 = &ctx->staging;
  46         const struct iwl_rxon_cmd *rxon2 = &ctx->active;
  47
  48         if ((rxon1->flags == rxon2->flags) &&
  49             (rxon1->filter_flags == rxon2->filter_flags) &&
  50             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
  51             (rxon1->ofdm_ht_single_stream_basic_rates ==
  52              rxon2->ofdm_ht_single_stream_basic_rates) &&
  53             (rxon1->ofdm_ht_dual_stream_basic_rates ==
  54              rxon2->ofdm_ht_dual_stream_basic_rates) &&
  55             (rxon1->ofdm_ht_triple_stream_basic_rates ==
  56              rxon2->ofdm_ht_triple_stream_basic_rates) &&
  57             (rxon1->acquisition_data == rxon2->acquisition_data) &&
  58             (rxon1->rx_chain == rxon2->rx_chain) &&
  59             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
  60                 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
  61                 return 0;
  62         }
  63
  64         rxon_assoc.flags = ctx->staging.flags;
  65         rxon_assoc.filter_flags = ctx->staging.filter_flags;
  66         rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
  67         rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
  68         rxon_assoc.reserved1 = 0;
  69         rxon_assoc.reserved2 = 0;
  70         rxon_assoc.reserved3 = 0;
  71         rxon_assoc.ofdm_ht_single_stream_basic_rates =
  72             ctx->staging.ofdm_ht_single_stream_basic_rates;
  73         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
  74             ctx->staging.ofdm_ht_dual_stream_basic_rates;
  75         rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
  76         rxon_assoc.ofdm_ht_triple_stream_basic_rates =
  77                  ctx->staging.ofdm_ht_triple_stream_basic_rates;
  78         rxon_assoc.acquisition_data = ctx->staging.acquisition_data;
  79
  80         ret = iwl_send_cmd_pdu_async(priv, ctx->rxon_assoc_cmd,
  81                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
  82         if (ret)
  83                 return ret;
  84
  85         return ret;
  86 }
  87
  88 int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
  89 {
  90         struct iwl_tx_ant_config_cmd tx_ant_cmd = {
  91           .valid = cpu_to_le32(valid_tx_ant),
  92         };
  93
  94         if (IWL_UCODE_API(priv->ucode_ver) > 1) {
  95                 IWL_DEBUG_HC(priv, "select valid tx ant: %u\n", valid_tx_ant);
  96                 return iwl_send_cmd_pdu(priv, TX_ANT_CONFIGURATION_CMD,
  97                                         sizeof(struct iwl_tx_ant_config_cmd),
  98                                         &tx_ant_cmd);
  99         } else {
 100                 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
 101                 return -EOPNOTSUPP;
 102         }
 103 }
 104
 105 /* Currently this is the superset of everything */
 106 static u16 iwlagn_get_hcmd_size(u8 cmd_id, u16 len)
 107 {
 108         return len;
 109 }
 110
 111 static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
 112 {
 113         u16 size = (u16)sizeof(struct iwl_addsta_cmd);
 114         struct iwl_addsta_cmd *addsta = (struct iwl_addsta_cmd *)data;
 115         memcpy(addsta, cmd, size);
 116         /* resrved in 5000 */
 117         addsta->rate_n_flags = cpu_to_le16(0);
 118         return size;
 119 }
 120
 121 static void iwlagn_gain_computation(struct iwl_priv *priv,
 122                 u32 average_noise[NUM_RX_CHAINS],
 123                 u16 min_average_noise_antenna_i,
 124                 u32 min_average_noise,
 125                 u8 default_chain)
 126 {
 127         int i;
 128         s32 delta_g;
 129         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 130
 131         /*
 132          * Find Gain Code for the chains based on "default chain"
 133          */
 134         for (i = default_chain + 1; i < NUM_RX_CHAINS; i++) {
 135                 if ((data->disconn_array[i])) {
 136                         data->delta_gain_code[i] = 0;
 137                         continue;
 138                 }
 139
 140                 delta_g = (priv->cfg->base_params->chain_noise_scale *
 141                         ((s32)average_noise[default_chain] -
 142                         (s32)average_noise[i])) / 1500;
 143
 144                 /* bound gain by 2 bits value max, 3rd bit is sign */
 145                 data->delta_gain_code[i] =
 146                         min(abs(delta_g), (long) CHAIN_NOISE_MAX_DELTA_GAIN_CODE);
 147
 148                 if (delta_g < 0)
 149                         /*
 150                          * set negative sign ...
 151                          * note to Intel developers:  This is uCode API format,
 152                          *   not the format of any internal device registers.
 153                          *   Do not change this format for e.g. 6050 or similar
 154                          *   devices.  Change format only if more resolution
 155                          *   (i.e. more than 2 bits magnitude) is needed.
 156                          */
 157                         data->delta_gain_code[i] |= (1 << 2);
 158         }
 159
 160         IWL_DEBUG_CALIB(priv, "Delta gains: ANT_B = %d  ANT_C = %d\n",
 161                         data->delta_gain_code[1], data->delta_gain_code[2]);
 162
 163         if (!data->radio_write) {
 164                 struct iwl_calib_chain_noise_gain_cmd cmd;
 165
 166                 memset(&cmd, 0, sizeof(cmd));
 167
 168                 cmd.hdr.op_code = priv->_agn.phy_calib_chain_noise_gain_cmd;
 169                 cmd.hdr.first_group = 0;
 170                 cmd.hdr.groups_num = 1;
 171                 cmd.hdr.data_valid = 1;
 172                 cmd.delta_gain_1 = data->delta_gain_code[1];
 173                 cmd.delta_gain_2 = data->delta_gain_code[2];
 174                 iwl_send_cmd_pdu_async(priv, REPLY_PHY_CALIBRATION_CMD,
 175                         sizeof(cmd), &cmd, NULL);
 176
 177                 data->radio_write = 1;
 178                 data->state = IWL_CHAIN_NOISE_CALIBRATED;
 179         }
 180 }
 181
 182 static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
 183 {
 184         struct iwl_chain_noise_data *data = &priv->chain_noise_data;
 185         int ret;
 186
 187         if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
 188             iwl_is_any_associated(priv)) {
 189                 struct iwl_calib_chain_noise_reset_cmd cmd;
 190
 191                 /* clear data for chain noise calibration algorithm */
 192                 data->chain_noise_a = 0;
 193                 data->chain_noise_b = 0;
 194                 data->chain_noise_c = 0;
 195                 data->chain_signal_a = 0;
 196                 data->chain_signal_b = 0;
 197                 data->chain_signal_c = 0;
 198                 data->beacon_count = 0;
 199
 200                 memset(&cmd, 0, sizeof(cmd));
 201                 cmd.hdr.op_code = priv->_agn.phy_calib_chain_noise_reset_cmd;
 202                 cmd.hdr.first_group = 0;
 203                 cmd.hdr.groups_num = 1;
 204                 cmd.hdr.data_valid = 1;
 205                 ret = iwl_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
 206                                         sizeof(cmd), &cmd);
 207                 if (ret)
 208                         IWL_ERR(priv,
 209                                 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
 210                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
 211                 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
 212         }
 213 }
 214
 215 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
 216                                      struct ieee80211_tx_info *info,
 217                                      __le16 fc, __le32 *tx_flags)
 218 {
 219         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS ||
 220             info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 221                 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
 222                 return;
 223         }
 224
 225         if (priv->cfg->ht_params &&
 226             priv->cfg->ht_params->use_rts_for_aggregation &&
 227             info->flags & IEEE80211_TX_CTL_AMPDU) {
 228                 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
 229                 return;
 230         }
 231 }
 232
 233 /* Calc max signal level (dBm) among 3 possible receivers */
 234 static int iwlagn_calc_rssi(struct iwl_priv *priv,
 235                              struct iwl_rx_phy_res *rx_resp)
 236 {
 237         /* data from PHY/DSP regarding signal strength, etc.,
 238          *   contents are always there, not configurable by host
 239          */
 240         struct iwlagn_non_cfg_phy *ncphy =
 241                 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
 242         u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
 243         u8 agc;
 244
 245         val  = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
 246         agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
 247
 248         /* Find max rssi among 3 possible receivers.
 249          * These values are measured by the digital signal processor (DSP).
 250          * They should stay fairly constant even as the signal strength varies,
 251          *   if the radio's automatic gain control (AGC) is working right.
 252          * AGC value (see below) will provide the "interesting" info.
 253          */
 254         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
 255         rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
 256                 IWLAGN_OFDM_RSSI_A_BIT_POS;
 257         rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
 258                 IWLAGN_OFDM_RSSI_B_BIT_POS;
 259         val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
 260         rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
 261                 IWLAGN_OFDM_RSSI_C_BIT_POS;
 262
 263         max_rssi = max_t(u32, rssi_a, rssi_b);
 264         max_rssi = max_t(u32, max_rssi, rssi_c);
 265
 266         IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
 267                 rssi_a, rssi_b, rssi_c, max_rssi, agc);
 268
 269         /* dBm = max_rssi dB - agc dB - constant.
 270          * Higher AGC (higher radio gain) means lower signal. */
 271         return max_rssi - agc - IWLAGN_RSSI_OFFSET;
 272 }
 273
 274 static int iwlagn_set_pan_params(struct iwl_priv *priv)
 275 {
 276         struct iwl_wipan_params_cmd cmd;
 277         struct iwl_rxon_context *ctx_bss, *ctx_pan;
 278         int slot0 = 300, slot1 = 0;
 279         int ret;
 280
 281         if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
 282                 return 0;
 283
 284         BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
 285
 286         lockdep_assert_held(&priv->mutex);
 287
 288         ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
 289         ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
 290
 291         /*
 292          * If the PAN context is inactive, then we don't need
 293          * to update the PAN parameters, the last thing we'll
 294          * have done before it goes inactive is making the PAN
 295          * parameters be WLAN-only.
 296          */
 297         if (!ctx_pan->is_active)
 298                 return 0;
 299
 300         memset(&cmd, 0, sizeof(cmd));
 301
 302         /* only 2 slots are currently allowed */
 303         cmd.num_slots = 2;
 304
 305         cmd.slots[0].type = 0; /* BSS */
 306         cmd.slots[1].type = 1; /* PAN */
 307
 308         if (priv->_agn.hw_roc_channel) {
 309                 /* both contexts must be used for this to happen */
 310                 slot1 = priv->_agn.hw_roc_duration;
 311                 slot0 = IWL_MIN_SLOT_TIME;
 312         } else if (ctx_bss->vif && ctx_pan->vif) {
 313                 int bcnint = ctx_pan->vif->bss_conf.beacon_int;
 314                 int dtim = ctx_pan->vif->bss_conf.dtim_period ?: 1;
 315
 316                 /* should be set, but seems unused?? */
 317                 cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
 318
 319                 if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
 320                     bcnint &&
 321                     bcnint != ctx_bss->vif->bss_conf.beacon_int) {
 322                         IWL_ERR(priv,
 323                                 "beacon intervals don't match (%d, %d)\n",
 324                                 ctx_bss->vif->bss_conf.beacon_int,
 325                                 ctx_pan->vif->bss_conf.beacon_int);
 326                 } else
 327                         bcnint = max_t(int, bcnint,
 328                                        ctx_bss->vif->bss_conf.beacon_int);
 329                 if (!bcnint)
 330                         bcnint = DEFAULT_BEACON_INTERVAL;
 331                 slot0 = bcnint / 2;
 332                 slot1 = bcnint - slot0;
 333
 334                 if (test_bit(STATUS_SCAN_HW, &priv->status) ||
 335                     (!ctx_bss->vif->bss_conf.idle &&
 336                      !ctx_bss->vif->bss_conf.assoc)) {
 337                         slot0 = dtim * bcnint * 3 - IWL_MIN_SLOT_TIME;
 338                         slot1 = IWL_MIN_SLOT_TIME;
 339                 } else if (!ctx_pan->vif->bss_conf.idle &&
 340                            !ctx_pan->vif->bss_conf.assoc) {
 341                         slot1 = bcnint * 3 - IWL_MIN_SLOT_TIME;
 342                         slot0 = IWL_MIN_SLOT_TIME;
 343                 }
 344         } else if (ctx_pan->vif) {
 345                 slot0 = 0;
 346                 slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
 347                                         ctx_pan->vif->bss_conf.beacon_int;
 348                 slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
 349
 350                 if (test_bit(STATUS_SCAN_HW, &priv->status)) {
 351                         slot0 = slot1 * 3 - IWL_MIN_SLOT_TIME;
 352                         slot1 = IWL_MIN_SLOT_TIME;
 353                 }
 354         }
 355
 356         cmd.slots[0].width = cpu_to_le16(slot0);
 357         cmd.slots[1].width = cpu_to_le16(slot1);
 358
 359         ret = iwl_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, sizeof(cmd), &cmd);
 360         if (ret)
 361                 IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
 362
 363         return ret;
 364 }
 365
 366 struct iwl_hcmd_ops iwlagn_hcmd = {
 367         .rxon_assoc = iwlagn_send_rxon_assoc,
 368         .commit_rxon = iwlagn_commit_rxon,
 369         .set_rxon_chain = iwlagn_set_rxon_chain,
 370         .set_tx_ant = iwlagn_send_tx_ant_config,
 371         .send_bt_config = iwl_send_bt_config,
 372         .set_pan_params = iwlagn_set_pan_params,
 373 };
 374
 375 struct iwl_hcmd_ops iwlagn_bt_hcmd = {
 376         .rxon_assoc = iwlagn_send_rxon_assoc,
 377         .commit_rxon = iwlagn_commit_rxon,
 378         .set_rxon_chain = iwlagn_set_rxon_chain,
 379         .set_tx_ant = iwlagn_send_tx_ant_config,
 380         .send_bt_config = iwlagn_send_advance_bt_config,
 381         .set_pan_params = iwlagn_set_pan_params,
 382 };
 383
 384 struct iwl_hcmd_utils_ops iwlagn_hcmd_utils = {
 385         .get_hcmd_size = iwlagn_get_hcmd_size,
 386         .build_addsta_hcmd = iwlagn_build_addsta_hcmd,
 387         .gain_computation = iwlagn_gain_computation,
 388         .chain_noise_reset = iwlagn_chain_noise_reset,
 389         .tx_cmd_protection = iwlagn_tx_cmd_protection,
 390         .calc_rssi = iwlagn_calc_rssi,
 391         .request_scan = iwlagn_request_scan,
 392         .post_scan = iwlagn_post_scan,
 393 };