Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / net / wireless / iwlegacy / iwl-4965-rx.c
blob2b144bbfc3c5843015ae5917fdc8bf1b47935b94
1 /******************************************************************************
3 * GPL LICENSE SUMMARY
5 * Copyright(c) 2008 - 2011 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,
19 * USA
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>
35 #include "iwl-dev.h"
36 #include "iwl-core.h"
37 #include "iwl-4965-calib.h"
38 #include "iwl-sta.h"
39 #include "iwl-io.h"
40 #include "iwl-helpers.h"
41 #include "iwl-4965-hw.h"
42 #include "iwl-4965.h"
44 void iwl4965_rx_missed_beacon_notif(struct iwl_priv *priv,
45 struct iwl_rx_mem_buffer *rxb)
48 struct iwl_rx_packet *pkt = rxb_addr(rxb);
49 struct iwl_missed_beacon_notif *missed_beacon;
51 missed_beacon = &pkt->u.missed_beacon;
52 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
53 priv->missed_beacon_threshold) {
54 IWL_DEBUG_CALIB(priv,
55 "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
56 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
57 le32_to_cpu(missed_beacon->total_missed_becons),
58 le32_to_cpu(missed_beacon->num_recvd_beacons),
59 le32_to_cpu(missed_beacon->num_expected_beacons));
60 if (!test_bit(STATUS_SCANNING, &priv->status))
61 iwl4965_init_sensitivity(priv);
65 /* Calculate noise level, based on measurements during network silence just
66 * before arriving beacon. This measurement can be done only if we know
67 * exactly when to expect beacons, therefore only when we're associated. */
68 static void iwl4965_rx_calc_noise(struct iwl_priv *priv)
70 struct statistics_rx_non_phy *rx_info;
71 int num_active_rx = 0;
72 int total_silence = 0;
73 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
74 int last_rx_noise;
76 rx_info = &(priv->_4965.statistics.rx.general);
77 bcn_silence_a =
78 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
79 bcn_silence_b =
80 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
81 bcn_silence_c =
82 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
84 if (bcn_silence_a) {
85 total_silence += bcn_silence_a;
86 num_active_rx++;
88 if (bcn_silence_b) {
89 total_silence += bcn_silence_b;
90 num_active_rx++;
92 if (bcn_silence_c) {
93 total_silence += bcn_silence_c;
94 num_active_rx++;
97 /* Average among active antennas */
98 if (num_active_rx)
99 last_rx_noise = (total_silence / num_active_rx) - 107;
100 else
101 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
103 IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
104 bcn_silence_a, bcn_silence_b, bcn_silence_c,
105 last_rx_noise);
108 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
110 * based on the assumption of all statistics counter are in DWORD
111 * FIXME: This function is for debugging, do not deal with
112 * the case of counters roll-over.
114 static void iwl4965_accumulative_statistics(struct iwl_priv *priv,
115 __le32 *stats)
117 int i, size;
118 __le32 *prev_stats;
119 u32 *accum_stats;
120 u32 *delta, *max_delta;
121 struct statistics_general_common *general, *accum_general;
122 struct statistics_tx *tx, *accum_tx;
124 prev_stats = (__le32 *)&priv->_4965.statistics;
125 accum_stats = (u32 *)&priv->_4965.accum_statistics;
126 size = sizeof(struct iwl_notif_statistics);
127 general = &priv->_4965.statistics.general.common;
128 accum_general = &priv->_4965.accum_statistics.general.common;
129 tx = &priv->_4965.statistics.tx;
130 accum_tx = &priv->_4965.accum_statistics.tx;
131 delta = (u32 *)&priv->_4965.delta_statistics;
132 max_delta = (u32 *)&priv->_4965.max_delta;
134 for (i = sizeof(__le32); i < size;
135 i += sizeof(__le32), stats++, prev_stats++, delta++,
136 max_delta++, accum_stats++) {
137 if (le32_to_cpu(*stats) > le32_to_cpu(*prev_stats)) {
138 *delta = (le32_to_cpu(*stats) -
139 le32_to_cpu(*prev_stats));
140 *accum_stats += *delta;
141 if (*delta > *max_delta)
142 *max_delta = *delta;
146 /* reset accumulative statistics for "no-counter" type statistics */
147 accum_general->temperature = general->temperature;
148 accum_general->ttl_timestamp = general->ttl_timestamp;
150 #endif
152 #define REG_RECALIB_PERIOD (60)
154 void iwl4965_rx_statistics(struct iwl_priv *priv,
155 struct iwl_rx_mem_buffer *rxb)
157 int change;
158 struct iwl_rx_packet *pkt = rxb_addr(rxb);
160 IWL_DEBUG_RX(priv,
161 "Statistics notification received (%d vs %d).\n",
162 (int)sizeof(struct iwl_notif_statistics),
163 le32_to_cpu(pkt->len_n_flags) &
164 FH_RSCSR_FRAME_SIZE_MSK);
166 change = ((priv->_4965.statistics.general.common.temperature !=
167 pkt->u.stats.general.common.temperature) ||
168 ((priv->_4965.statistics.flag &
169 STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
170 (pkt->u.stats.flag &
171 STATISTICS_REPLY_FLG_HT40_MODE_MSK)));
172 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
173 iwl4965_accumulative_statistics(priv, (__le32 *)&pkt->u.stats);
174 #endif
176 /* TODO: reading some of statistics is unneeded */
177 memcpy(&priv->_4965.statistics, &pkt->u.stats,
178 sizeof(priv->_4965.statistics));
180 set_bit(STATUS_STATISTICS, &priv->status);
182 /* Reschedule the statistics timer to occur in
183 * REG_RECALIB_PERIOD seconds to ensure we get a
184 * thermal update even if the uCode doesn't give
185 * us one */
186 mod_timer(&priv->statistics_periodic, jiffies +
187 msecs_to_jiffies(REG_RECALIB_PERIOD * 1000));
189 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
190 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
191 iwl4965_rx_calc_noise(priv);
192 queue_work(priv->workqueue, &priv->run_time_calib_work);
194 if (priv->cfg->ops->lib->temp_ops.temperature && change)
195 priv->cfg->ops->lib->temp_ops.temperature(priv);
198 void iwl4965_reply_statistics(struct iwl_priv *priv,
199 struct iwl_rx_mem_buffer *rxb)
201 struct iwl_rx_packet *pkt = rxb_addr(rxb);
203 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
204 #ifdef CONFIG_IWLWIFI_LEGACY_DEBUGFS
205 memset(&priv->_4965.accum_statistics, 0,
206 sizeof(struct iwl_notif_statistics));
207 memset(&priv->_4965.delta_statistics, 0,
208 sizeof(struct iwl_notif_statistics));
209 memset(&priv->_4965.max_delta, 0,
210 sizeof(struct iwl_notif_statistics));
211 #endif
212 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
214 iwl4965_rx_statistics(priv, rxb);