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, ctx->rxon_assoc_cmd,
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->base_params->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->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;
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)
237
/* data from PHY/DSP regarding signal strength, etc.,
238
* contents are always there, not configurable by host
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;
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;
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.
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;
263
max_rssi = max_t(u32, rssi_a, rssi_b);
264
max_rssi = max_t(u32, max_rssi, rssi_c);
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);
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;
274
static int iwlagn_set_pan_params(struct iwl_priv *priv)
276
struct iwl_wipan_params_cmd cmd;
277
struct iwl_rxon_context *ctx_bss, *ctx_pan;
278
int slot0 = 300, slot1 = 0;
281
if (priv->valid_contexts == BIT(IWL_RXON_CTX_BSS))
284
BUILD_BUG_ON(NUM_IWL_RXON_CTX != 2);
286
lockdep_assert_held(&priv->mutex);
288
ctx_bss = &priv->contexts[IWL_RXON_CTX_BSS];
289
ctx_pan = &priv->contexts[IWL_RXON_CTX_PAN];
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.
297
if (!ctx_pan->is_active)
300
memset(&cmd, 0, sizeof(cmd));
302
/* only 2 slots are currently allowed */
305
cmd.slots[0].type = 0; /* BSS */
306
cmd.slots[1].type = 1; /* PAN */
308
if (ctx_bss->vif && ctx_pan->vif) {
309
int bcnint = ctx_pan->vif->bss_conf.beacon_int;
311
/* should be set, but seems unused?? */
312
cmd.flags |= cpu_to_le16(IWL_WIPAN_PARAMS_FLG_SLOTTED_MODE);
314
if (ctx_pan->vif->type == NL80211_IFTYPE_AP &&
316
bcnint != ctx_bss->vif->bss_conf.beacon_int) {
318
"beacon intervals don't match (%d, %d)\n",
319
ctx_bss->vif->bss_conf.beacon_int,
320
ctx_pan->vif->bss_conf.beacon_int);
322
bcnint = max_t(int, bcnint,
323
ctx_bss->vif->bss_conf.beacon_int);
325
bcnint = DEFAULT_BEACON_INTERVAL;
327
slot1 = bcnint - slot0;
329
if (test_bit(STATUS_SCAN_HW, &priv->status) ||
330
(!ctx_bss->vif->bss_conf.idle &&
331
!ctx_bss->vif->bss_conf.assoc)) {
332
slot0 = bcnint * 3 - 20;
334
} else if (!ctx_pan->vif->bss_conf.idle &&
335
!ctx_pan->vif->bss_conf.assoc) {
336
slot1 = bcnint * 3 - 20;
339
} else if (ctx_pan->vif) {
341
slot1 = max_t(int, 1, ctx_pan->vif->bss_conf.dtim_period) *
342
ctx_pan->vif->bss_conf.beacon_int;
343
slot1 = max_t(int, DEFAULT_BEACON_INTERVAL, slot1);
345
if (test_bit(STATUS_SCAN_HW, &priv->status)) {
346
slot0 = slot1 * 3 - 20;
351
cmd.slots[0].width = cpu_to_le16(slot0);
352
cmd.slots[1].width = cpu_to_le16(slot1);
354
ret = iwl_send_cmd_pdu(priv, REPLY_WIPAN_PARAMS, sizeof(cmd), &cmd);
356
IWL_ERR(priv, "Error setting PAN parameters (%d)\n", ret);
361
struct iwl_hcmd_ops iwlagn_hcmd = {
362
.rxon_assoc = iwlagn_send_rxon_assoc,
363
.commit_rxon = iwlagn_commit_rxon,
364
.set_rxon_chain = iwlagn_set_rxon_chain,
365
.set_tx_ant = iwlagn_send_tx_ant_config,
366
.send_bt_config = iwl_send_bt_config,
367
.set_pan_params = iwlagn_set_pan_params,
370
struct iwl_hcmd_ops iwlagn_bt_hcmd = {
371
.rxon_assoc = iwlagn_send_rxon_assoc,
372
.commit_rxon = iwlagn_commit_rxon,
373
.set_rxon_chain = iwlagn_set_rxon_chain,
374
.set_tx_ant = iwlagn_send_tx_ant_config,
375
.send_bt_config = iwlagn_send_advance_bt_config,
376
.set_pan_params = iwlagn_set_pan_params,
379
struct iwl_hcmd_utils_ops iwlagn_hcmd_utils = {
380
.get_hcmd_size = iwlagn_get_hcmd_size,
381
.build_addsta_hcmd = iwlagn_build_addsta_hcmd,
382
.gain_computation = iwlagn_gain_computation,
383
.chain_noise_reset = iwlagn_chain_noise_reset,
384
.tx_cmd_protection = iwlagn_tx_cmd_protection,
385
.calc_rssi = iwlagn_calc_rssi,
386
.request_scan = iwlagn_request_scan,
387
.post_scan = iwlagn_post_scan,