1 /******************************************************************************
5 * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved.
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.
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.
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,
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
28 *****************************************************************************/
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/sched.h>
40 int iwlagn_send_rxon_assoc(struct iwl_priv *priv,
41 struct iwl_rxon_context *ctx)
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;
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");
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;
80 ret = iwl_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
81 sizeof(rxon_assoc), &rxon_assoc, NULL);
88 int iwlagn_send_tx_ant_config(struct iwl_priv *priv, u8 valid_tx_ant)
90 struct iwl_tx_ant_config_cmd tx_ant_cmd = {
91 .valid = cpu_to_le32(valid_tx_ant),
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),
100 IWL_DEBUG_HC(priv, "TX_ANT_CONFIGURATION_CMD not supported\n");
105 /* Currently this is the superset of everything */
106 static u16 iwlagn_get_hcmd_size(u8 cmd_id, u16 len)
111 static u16 iwlagn_build_addsta_hcmd(const struct iwl_addsta_cmd *cmd, u8 *data)
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);
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,
129 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
132 * Find Gain Code for the chains based on "default chain"
134 for (i = default_chain + 1; i < NUM_RX_CHAINS; i++) {
135 if ((data->disconn_array[i])) {
136 data->delta_gain_code[i] = 0;
140 delta_g = (priv->cfg->chain_noise_scale *
141 ((s32)average_noise[default_chain] -
142 (s32)average_noise[i])) / 1500;
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);
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.
157 data->delta_gain_code[i] |= (1 << 2);
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]);
163 if (!data->radio_write) {
164 struct iwl_calib_chain_noise_gain_cmd cmd;
166 memset(&cmd, 0, sizeof(cmd));
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);
177 data->radio_write = 1;
178 data->state = IWL_CHAIN_NOISE_CALIBRATED;
182 static void iwlagn_chain_noise_reset(struct iwl_priv *priv)
184 struct iwl_chain_noise_data *data = &priv->chain_noise_data;
187 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
188 iwl_is_any_associated(priv)) {
189 struct iwl_calib_chain_noise_reset_cmd cmd;
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;
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,
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");
215 static void iwlagn_tx_cmd_protection(struct iwl_priv *priv,
216 struct ieee80211_tx_info *info,
217 __le16 fc, __le32 *tx_flags)
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;
225 if (priv->cfg->use_rts_for_aggregation &&
226 info->flags & IEEE80211_TX_CTL_AMPDU) {
227 *tx_flags |= TX_CMD_FLG_PROT_REQUIRE_MSK;
232 /* Calc max signal level (dBm) among 3 possible receivers */
233 static int iwlagn_calc_rssi(struct iwl_priv *priv,
234 struct iwl_rx_phy_res *rx_resp)
236 /* data from PHY/DSP regarding signal strength, etc.,
237 * contents are always there, not configurable by host
239 struct iwlagn_non_cfg_phy *ncphy =
240 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
241 u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
244 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
245 agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
247 /* Find max rssi among 3 possible receivers.
248 * These values are measured by the digital signal processor (DSP).
249 * They should stay fairly constant even as the signal strength varies,
250 * if the radio's automatic gain control (AGC) is working right.
251 * AGC value (see below) will provide the "interesting" info.
253 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
254 rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
255 IWLAGN_OFDM_RSSI_A_BIT_POS;
256 rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
257 IWLAGN_OFDM_RSSI_B_BIT_POS;
258 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
259 rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
260 IWLAGN_OFDM_RSSI_C_BIT_POS;
262 max_rssi = max_t(u32, rssi_a, rssi_b);
263 max_rssi = max_t(u32, max_rssi, rssi_c);
265 IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
266 rssi_a, rssi_b, rssi_c, max_rssi, agc);
268 /* dBm = max_rssi dB - agc dB - constant.
269 * Higher AGC (higher radio gain) means lower signal. */
270 return max_rssi - agc - IWLAGN_RSSI_OFFSET;
273 struct iwl_hcmd_ops iwlagn_hcmd = {
274 .rxon_assoc = iwlagn_send_rxon_assoc,
275 .commit_rxon = iwl_commit_rxon,
276 .set_rxon_chain = iwl_set_rxon_chain,
277 .set_tx_ant = iwlagn_send_tx_ant_config,
278 .send_bt_config = iwl_send_bt_config,
281 struct iwl_hcmd_ops iwlagn_bt_hcmd = {
282 .rxon_assoc = iwlagn_send_rxon_assoc,
283 .commit_rxon = iwl_commit_rxon,
284 .set_rxon_chain = iwl_set_rxon_chain,
285 .set_tx_ant = iwlagn_send_tx_ant_config,
286 .send_bt_config = iwlagn_send_advance_bt_config,
289 struct iwl_hcmd_utils_ops iwlagn_hcmd_utils = {
290 .get_hcmd_size = iwlagn_get_hcmd_size,
291 .build_addsta_hcmd = iwlagn_build_addsta_hcmd,
292 .gain_computation = iwlagn_gain_computation,
293 .chain_noise_reset = iwlagn_chain_noise_reset,
294 .tx_cmd_protection = iwlagn_tx_cmd_protection,
295 .calc_rssi = iwlagn_calc_rssi,
296 .request_scan = iwlagn_request_scan,