Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.git] / drivers / net / wireless / iwlegacy / iwl-4965.c
1 /******************************************************************************
2  *
3  * Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of version 2 of the GNU General Public License as
7  * published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12  * more details.
13  *
14  * You should have received a copy of the GNU General Public License along with
15  * this program; if not, write to the Free Software Foundation, Inc.,
16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17  *
18  * The full GNU General Public License is included in this distribution in the
19  * file called LICENSE.
20  *
21  * Contact Information:
22  *  Intel Linux Wireless <ilw@linux.intel.com>
23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
24  *
25  *****************************************************************************/
26
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/pci.h>
31 #include <linux/dma-mapping.h>
32 #include <linux/delay.h>
33 #include <linux/sched.h>
34 #include <linux/skbuff.h>
35 #include <linux/netdevice.h>
36 #include <linux/wireless.h>
37 #include <net/mac80211.h>
38 #include <linux/etherdevice.h>
39 #include <asm/unaligned.h>
40
41 #include "iwl-eeprom.h"
42 #include "iwl-dev.h"
43 #include "iwl-core.h"
44 #include "iwl-io.h"
45 #include "iwl-helpers.h"
46 #include "iwl-4965-calib.h"
47 #include "iwl-sta.h"
48 #include "iwl-4965-led.h"
49 #include "iwl-4965.h"
50 #include "iwl-4965-debugfs.h"
51
52 static int iwl4965_send_tx_power(struct iwl_priv *priv);
53 static int iwl4965_hw_get_temperature(struct iwl_priv *priv);
54
55 /* Highest firmware API version supported */
56 #define IWL4965_UCODE_API_MAX 2
57
58 /* Lowest firmware API version supported */
59 #define IWL4965_UCODE_API_MIN 2
60
61 #define IWL4965_FW_PRE "iwlwifi-4965-"
62 #define _IWL4965_MODULE_FIRMWARE(api) IWL4965_FW_PRE #api ".ucode"
63 #define IWL4965_MODULE_FIRMWARE(api) _IWL4965_MODULE_FIRMWARE(api)
64
65 /* check contents of special bootstrap uCode SRAM */
66 static int iwl4965_verify_bsm(struct iwl_priv *priv)
67 {
68         __le32 *image = priv->ucode_boot.v_addr;
69         u32 len = priv->ucode_boot.len;
70         u32 reg;
71         u32 val;
72
73         IWL_DEBUG_INFO(priv, "Begin verify bsm\n");
74
75         /* verify BSM SRAM contents */
76         val = iwl_legacy_read_prph(priv, BSM_WR_DWCOUNT_REG);
77         for (reg = BSM_SRAM_LOWER_BOUND;
78              reg < BSM_SRAM_LOWER_BOUND + len;
79              reg += sizeof(u32), image++) {
80                 val = iwl_legacy_read_prph(priv, reg);
81                 if (val != le32_to_cpu(*image)) {
82                         IWL_ERR(priv, "BSM uCode verification failed at "
83                                   "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
84                                   BSM_SRAM_LOWER_BOUND,
85                                   reg - BSM_SRAM_LOWER_BOUND, len,
86                                   val, le32_to_cpu(*image));
87                         return -EIO;
88                 }
89         }
90
91         IWL_DEBUG_INFO(priv, "BSM bootstrap uCode image OK\n");
92
93         return 0;
94 }
95
96 /**
97  * iwl4965_load_bsm - Load bootstrap instructions
98  *
99  * BSM operation:
100  *
101  * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
102  * in special SRAM that does not power down during RFKILL.  When powering back
103  * up after power-saving sleeps (or during initial uCode load), the BSM loads
104  * the bootstrap program into the on-board processor, and starts it.
105  *
106  * The bootstrap program loads (via DMA) instructions and data for a new
107  * program from host DRAM locations indicated by the host driver in the
108  * BSM_DRAM_* registers.  Once the new program is loaded, it starts
109  * automatically.
110  *
111  * When initializing the NIC, the host driver points the BSM to the
112  * "initialize" uCode image.  This uCode sets up some internal data, then
113  * notifies host via "initialize alive" that it is complete.
114  *
115  * The host then replaces the BSM_DRAM_* pointer values to point to the
116  * normal runtime uCode instructions and a backup uCode data cache buffer
117  * (filled initially with starting data values for the on-board processor),
118  * then triggers the "initialize" uCode to load and launch the runtime uCode,
119  * which begins normal operation.
120  *
121  * When doing a power-save shutdown, runtime uCode saves data SRAM into
122  * the backup data cache in DRAM before SRAM is powered down.
123  *
124  * When powering back up, the BSM loads the bootstrap program.  This reloads
125  * the runtime uCode instructions and the backup data cache into SRAM,
126  * and re-launches the runtime uCode from where it left off.
127  */
128 static int iwl4965_load_bsm(struct iwl_priv *priv)
129 {
130         __le32 *image = priv->ucode_boot.v_addr;
131         u32 len = priv->ucode_boot.len;
132         dma_addr_t pinst;
133         dma_addr_t pdata;
134         u32 inst_len;
135         u32 data_len;
136         int i;
137         u32 done;
138         u32 reg_offset;
139         int ret;
140
141         IWL_DEBUG_INFO(priv, "Begin load bsm\n");
142
143         priv->ucode_type = UCODE_RT;
144
145         /* make sure bootstrap program is no larger than BSM's SRAM size */
146         if (len > IWL49_MAX_BSM_SIZE)
147                 return -EINVAL;
148
149         /* Tell bootstrap uCode where to find the "Initialize" uCode
150          *   in host DRAM ... host DRAM physical address bits 35:4 for 4965.
151          * NOTE:  iwl_init_alive_start() will replace these values,
152          *        after the "initialize" uCode has run, to point to
153          *        runtime/protocol instructions and backup data cache.
154          */
155         pinst = priv->ucode_init.p_addr >> 4;
156         pdata = priv->ucode_init_data.p_addr >> 4;
157         inst_len = priv->ucode_init.len;
158         data_len = priv->ucode_init_data.len;
159
160         iwl_legacy_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
161         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
162         iwl_legacy_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
163         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
164
165         /* Fill BSM memory with bootstrap instructions */
166         for (reg_offset = BSM_SRAM_LOWER_BOUND;
167              reg_offset < BSM_SRAM_LOWER_BOUND + len;
168              reg_offset += sizeof(u32), image++)
169                 _iwl_legacy_write_prph(priv, reg_offset, le32_to_cpu(*image));
170
171         ret = iwl4965_verify_bsm(priv);
172         if (ret)
173                 return ret;
174
175         /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
176         iwl_legacy_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
177         iwl_legacy_write_prph(priv,
178                         BSM_WR_MEM_DST_REG, IWL49_RTC_INST_LOWER_BOUND);
179         iwl_legacy_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
180
181         /* Load bootstrap code into instruction SRAM now,
182          *   to prepare to load "initialize" uCode */
183         iwl_legacy_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
184
185         /* Wait for load of bootstrap uCode to finish */
186         for (i = 0; i < 100; i++) {
187                 done = iwl_legacy_read_prph(priv, BSM_WR_CTRL_REG);
188                 if (!(done & BSM_WR_CTRL_REG_BIT_START))
189                         break;
190                 udelay(10);
191         }
192         if (i < 100)
193                 IWL_DEBUG_INFO(priv, "BSM write complete, poll %d iterations\n", i);
194         else {
195                 IWL_ERR(priv, "BSM write did not complete!\n");
196                 return -EIO;
197         }
198
199         /* Enable future boot loads whenever power management unit triggers it
200          *   (e.g. when powering back up after power-save shutdown) */
201         iwl_legacy_write_prph(priv,
202                         BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
203
204
205         return 0;
206 }
207
208 /**
209  * iwl4965_set_ucode_ptrs - Set uCode address location
210  *
211  * Tell initialization uCode where to find runtime uCode.
212  *
213  * BSM registers initially contain pointers to initialization uCode.
214  * We need to replace them to load runtime uCode inst and data,
215  * and to save runtime data when powering down.
216  */
217 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
218 {
219         dma_addr_t pinst;
220         dma_addr_t pdata;
221         int ret = 0;
222
223         /* bits 35:4 for 4965 */
224         pinst = priv->ucode_code.p_addr >> 4;
225         pdata = priv->ucode_data_backup.p_addr >> 4;
226
227         /* Tell bootstrap uCode where to find image to load */
228         iwl_legacy_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
229         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
230         iwl_legacy_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
231                                  priv->ucode_data.len);
232
233         /* Inst byte count must be last to set up, bit 31 signals uCode
234          *   that all new ptr/size info is in place */
235         iwl_legacy_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
236                                  priv->ucode_code.len | BSM_DRAM_INST_LOAD);
237         IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
238
239         return ret;
240 }
241
242 /**
243  * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
244  *
245  * Called after REPLY_ALIVE notification received from "initialize" uCode.
246  *
247  * The 4965 "initialize" ALIVE reply contains calibration data for:
248  *   Voltage, temperature, and MIMO tx gain correction, now stored in priv
249  *   (3945 does not contain this data).
250  *
251  * Tell "initialize" uCode to go ahead and load the runtime uCode.
252 */
253 static void iwl4965_init_alive_start(struct iwl_priv *priv)
254 {
255         /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
256          * This is a paranoid check, because we would not have gotten the
257          * "initialize" alive if code weren't properly loaded.  */
258         if (iwl4965_verify_ucode(priv)) {
259                 /* Runtime instruction load was bad;
260                  * take it all the way back down so we can try again */
261                 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
262                 goto restart;
263         }
264
265         /* Calculate temperature */
266         priv->temperature = iwl4965_hw_get_temperature(priv);
267
268         /* Send pointers to protocol/runtime uCode image ... init code will
269          * load and launch runtime uCode, which will send us another "Alive"
270          * notification. */
271         IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
272         if (iwl4965_set_ucode_ptrs(priv)) {
273                 /* Runtime instruction load won't happen;
274                  * take it all the way back down so we can try again */
275                 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
276                 goto restart;
277         }
278         return;
279
280 restart:
281         queue_work(priv->workqueue, &priv->restart);
282 }
283
284 static bool iw4965_is_ht40_channel(__le32 rxon_flags)
285 {
286         int chan_mod = le32_to_cpu(rxon_flags & RXON_FLG_CHANNEL_MODE_MSK)
287                                     >> RXON_FLG_CHANNEL_MODE_POS;
288         return ((chan_mod == CHANNEL_MODE_PURE_40) ||
289                   (chan_mod == CHANNEL_MODE_MIXED));
290 }
291
292 static void iwl4965_nic_config(struct iwl_priv *priv)
293 {
294         unsigned long flags;
295         u16 radio_cfg;
296
297         spin_lock_irqsave(&priv->lock, flags);
298
299         radio_cfg = iwl_legacy_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
300
301         /* write radio config values to register */
302         if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
303                 iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
304                             EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
305                             EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
306                             EEPROM_RF_CFG_DASH_MSK(radio_cfg));
307
308         /* set CSR_HW_CONFIG_REG for uCode use */
309         iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
310                     CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
311                     CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
312
313         priv->calib_info = (struct iwl_eeprom_calib_info *)
314                 iwl_legacy_eeprom_query_addr(priv,
315                                 EEPROM_4965_CALIB_TXPOWER_OFFSET);
316
317         spin_unlock_irqrestore(&priv->lock, flags);
318 }
319
320 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
321  * Called after every association, but this runs only once!
322  *  ... once chain noise is calibrated the first time, it's good forever.  */
323 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
324 {
325         struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
326
327         if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
328             iwl_legacy_is_any_associated(priv)) {
329                 struct iwl_calib_diff_gain_cmd cmd;
330
331                 /* clear data for chain noise calibration algorithm */
332                 data->chain_noise_a = 0;
333                 data->chain_noise_b = 0;
334                 data->chain_noise_c = 0;
335                 data->chain_signal_a = 0;
336                 data->chain_signal_b = 0;
337                 data->chain_signal_c = 0;
338                 data->beacon_count = 0;
339
340                 memset(&cmd, 0, sizeof(cmd));
341                 cmd.hdr.op_code = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
342                 cmd.diff_gain_a = 0;
343                 cmd.diff_gain_b = 0;
344                 cmd.diff_gain_c = 0;
345                 if (iwl_legacy_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
346                                  sizeof(cmd), &cmd))
347                         IWL_ERR(priv,
348                                 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
349                 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
350                 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
351         }
352 }
353
354 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
355         .min_nrg_cck = 97,
356         .max_nrg_cck = 0, /* not used, set to 0 */
357
358         .auto_corr_min_ofdm = 85,
359         .auto_corr_min_ofdm_mrc = 170,
360         .auto_corr_min_ofdm_x1 = 105,
361         .auto_corr_min_ofdm_mrc_x1 = 220,
362
363         .auto_corr_max_ofdm = 120,
364         .auto_corr_max_ofdm_mrc = 210,
365         .auto_corr_max_ofdm_x1 = 140,
366         .auto_corr_max_ofdm_mrc_x1 = 270,
367
368         .auto_corr_min_cck = 125,
369         .auto_corr_max_cck = 200,
370         .auto_corr_min_cck_mrc = 200,
371         .auto_corr_max_cck_mrc = 400,
372
373         .nrg_th_cck = 100,
374         .nrg_th_ofdm = 100,
375
376         .barker_corr_th_min = 190,
377         .barker_corr_th_min_mrc = 390,
378         .nrg_th_cca = 62,
379 };
380
381 static void iwl4965_set_ct_threshold(struct iwl_priv *priv)
382 {
383         /* want Kelvin */
384         priv->hw_params.ct_kill_threshold =
385                 CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY);
386 }
387
388 /**
389  * iwl4965_hw_set_hw_params
390  *
391  * Called when initializing driver
392  */
393 static int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
394 {
395         if (priv->cfg->mod_params->num_of_queues >= IWL_MIN_NUM_QUEUES &&
396             priv->cfg->mod_params->num_of_queues <= IWL49_NUM_QUEUES)
397                 priv->cfg->base_params->num_of_queues =
398                         priv->cfg->mod_params->num_of_queues;
399
400         priv->hw_params.max_txq_num = priv->cfg->base_params->num_of_queues;
401         priv->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
402         priv->hw_params.scd_bc_tbls_size =
403                         priv->cfg->base_params->num_of_queues *
404                         sizeof(struct iwl4965_scd_bc_tbl);
405         priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
406         priv->hw_params.max_stations = IWL4965_STATION_COUNT;
407         priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWL4965_BROADCAST_ID;
408         priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
409         priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
410         priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
411         priv->hw_params.ht40_channel = BIT(IEEE80211_BAND_5GHZ);
412
413         priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;
414
415         priv->hw_params.tx_chains_num = iwl4965_num_of_ant(priv->cfg->valid_tx_ant);
416         priv->hw_params.rx_chains_num = iwl4965_num_of_ant(priv->cfg->valid_rx_ant);
417         priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
418         priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
419
420         iwl4965_set_ct_threshold(priv);
421
422         priv->hw_params.sens = &iwl4965_sensitivity;
423         priv->hw_params.beacon_time_tsf_bits = IWL4965_EXT_BEACON_TIME_POS;
424
425         return 0;
426 }
427
428 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
429 {
430         s32 sign = 1;
431
432         if (num < 0) {
433                 sign = -sign;
434                 num = -num;
435         }
436         if (denom < 0) {
437                 sign = -sign;
438                 denom = -denom;
439         }
440         *res = 1;
441         *res = ((num * 2 + denom) / (denom * 2)) * sign;
442
443         return 1;
444 }
445
446 /**
447  * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
448  *
449  * Determines power supply voltage compensation for txpower calculations.
450  * Returns number of 1/2-dB steps to subtract from gain table index,
451  * to compensate for difference between power supply voltage during
452  * factory measurements, vs. current power supply voltage.
453  *
454  * Voltage indication is higher for lower voltage.
455  * Lower voltage requires more gain (lower gain table index).
456  */
457 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
458                                             s32 current_voltage)
459 {
460         s32 comp = 0;
461
462         if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
463             (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
464                 return 0;
465
466         iwl4965_math_div_round(current_voltage - eeprom_voltage,
467                                TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
468
469         if (current_voltage > eeprom_voltage)
470                 comp *= 2;
471         if ((comp < -2) || (comp > 2))
472                 comp = 0;
473
474         return comp;
475 }
476
477 static s32 iwl4965_get_tx_atten_grp(u16 channel)
478 {
479         if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
480             channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
481                 return CALIB_CH_GROUP_5;
482
483         if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
484             channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
485                 return CALIB_CH_GROUP_1;
486
487         if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
488             channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
489                 return CALIB_CH_GROUP_2;
490
491         if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
492             channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
493                 return CALIB_CH_GROUP_3;
494
495         if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
496             channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
497                 return CALIB_CH_GROUP_4;
498
499         return -EINVAL;
500 }
501
502 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
503 {
504         s32 b = -1;
505
506         for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
507                 if (priv->calib_info->band_info[b].ch_from == 0)
508                         continue;
509
510                 if ((channel >= priv->calib_info->band_info[b].ch_from)
511                     && (channel <= priv->calib_info->band_info[b].ch_to))
512                         break;
513         }
514
515         return b;
516 }
517
518 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
519 {
520         s32 val;
521
522         if (x2 == x1)
523                 return y1;
524         else {
525                 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
526                 return val + y2;
527         }
528 }
529
530 /**
531  * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
532  *
533  * Interpolates factory measurements from the two sample channels within a
534  * sub-band, to apply to channel of interest.  Interpolation is proportional to
535  * differences in channel frequencies, which is proportional to differences
536  * in channel number.
537  */
538 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
539                                     struct iwl_eeprom_calib_ch_info *chan_info)
540 {
541         s32 s = -1;
542         u32 c;
543         u32 m;
544         const struct iwl_eeprom_calib_measure *m1;
545         const struct iwl_eeprom_calib_measure *m2;
546         struct iwl_eeprom_calib_measure *omeas;
547         u32 ch_i1;
548         u32 ch_i2;
549
550         s = iwl4965_get_sub_band(priv, channel);
551         if (s >= EEPROM_TX_POWER_BANDS) {
552                 IWL_ERR(priv, "Tx Power can not find channel %d\n", channel);
553                 return -1;
554         }
555
556         ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
557         ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
558         chan_info->ch_num = (u8) channel;
559
560         IWL_DEBUG_TXPOWER(priv, "channel %d subband %d factory cal ch %d & %d\n",
561                           channel, s, ch_i1, ch_i2);
562
563         for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
564                 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
565                         m1 = &(priv->calib_info->band_info[s].ch1.
566                                measurements[c][m]);
567                         m2 = &(priv->calib_info->band_info[s].ch2.
568                                measurements[c][m]);
569                         omeas = &(chan_info->measurements[c][m]);
570
571                         omeas->actual_pow =
572                             (u8) iwl4965_interpolate_value(channel, ch_i1,
573                                                            m1->actual_pow,
574                                                            ch_i2,
575                                                            m2->actual_pow);
576                         omeas->gain_idx =
577                             (u8) iwl4965_interpolate_value(channel, ch_i1,
578                                                            m1->gain_idx, ch_i2,
579                                                            m2->gain_idx);
580                         omeas->temperature =
581                             (u8) iwl4965_interpolate_value(channel, ch_i1,
582                                                            m1->temperature,
583                                                            ch_i2,
584                                                            m2->temperature);
585                         omeas->pa_det =
586                             (s8) iwl4965_interpolate_value(channel, ch_i1,
587                                                            m1->pa_det, ch_i2,
588                                                            m2->pa_det);
589
590                         IWL_DEBUG_TXPOWER(priv,
591                                 "chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
592                                 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
593                         IWL_DEBUG_TXPOWER(priv,
594                                 "chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
595                                 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
596                         IWL_DEBUG_TXPOWER(priv,
597                                 "chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
598                                 m1->pa_det, m2->pa_det, omeas->pa_det);
599                         IWL_DEBUG_TXPOWER(priv,
600                                 "chain %d meas %d  T1=%d  T2=%d  T=%d\n", c, m,
601                                 m1->temperature, m2->temperature,
602                                 omeas->temperature);
603                 }
604         }
605
606         return 0;
607 }
608
609 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
610  * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
611 static s32 back_off_table[] = {
612         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
613         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
614         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
615         10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
616         10                      /* CCK */
617 };
618
619 /* Thermal compensation values for txpower for various frequency ranges ...
620  *   ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
621 static struct iwl4965_txpower_comp_entry {
622         s32 degrees_per_05db_a;
623         s32 degrees_per_05db_a_denom;
624 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
625         {9, 2},                 /* group 0 5.2, ch  34-43 */
626         {4, 1},                 /* group 1 5.2, ch  44-70 */
627         {4, 1},                 /* group 2 5.2, ch  71-124 */
628         {4, 1},                 /* group 3 5.2, ch 125-200 */
629         {3, 1}                  /* group 4 2.4, ch   all */
630 };
631
632 static s32 get_min_power_index(s32 rate_power_index, u32 band)
633 {
634         if (!band) {
635                 if ((rate_power_index & 7) <= 4)
636                         return MIN_TX_GAIN_INDEX_52GHZ_EXT;
637         }
638         return MIN_TX_GAIN_INDEX;
639 }
640
641 struct gain_entry {
642         u8 dsp;
643         u8 radio;
644 };
645
646 static const struct gain_entry gain_table[2][108] = {
647         /* 5.2GHz power gain index table */
648         {
649          {123, 0x3F},           /* highest txpower */
650          {117, 0x3F},
651          {110, 0x3F},
652          {104, 0x3F},
653          {98, 0x3F},
654          {110, 0x3E},
655          {104, 0x3E},
656          {98, 0x3E},
657          {110, 0x3D},
658          {104, 0x3D},
659          {98, 0x3D},
660          {110, 0x3C},
661          {104, 0x3C},
662          {98, 0x3C},
663          {110, 0x3B},
664          {104, 0x3B},
665          {98, 0x3B},
666          {110, 0x3A},
667          {104, 0x3A},
668          {98, 0x3A},
669          {110, 0x39},
670          {104, 0x39},
671          {98, 0x39},
672          {110, 0x38},
673          {104, 0x38},
674          {98, 0x38},
675          {110, 0x37},
676          {104, 0x37},
677          {98, 0x37},
678          {110, 0x36},
679          {104, 0x36},
680          {98, 0x36},
681          {110, 0x35},
682          {104, 0x35},
683          {98, 0x35},
684          {110, 0x34},
685          {104, 0x34},
686          {98, 0x34},
687          {110, 0x33},
688          {104, 0x33},
689          {98, 0x33},
690          {110, 0x32},
691          {104, 0x32},
692          {98, 0x32},
693          {110, 0x31},
694          {104, 0x31},
695          {98, 0x31},
696          {110, 0x30},
697          {104, 0x30},
698          {98, 0x30},
699          {110, 0x25},
700          {104, 0x25},
701          {98, 0x25},
702          {110, 0x24},
703          {104, 0x24},
704          {98, 0x24},
705          {110, 0x23},
706          {104, 0x23},
707          {98, 0x23},
708          {110, 0x22},
709          {104, 0x18},
710          {98, 0x18},
711          {110, 0x17},
712          {104, 0x17},
713          {98, 0x17},
714          {110, 0x16},
715          {104, 0x16},
716          {98, 0x16},
717          {110, 0x15},
718          {104, 0x15},
719          {98, 0x15},
720          {110, 0x14},
721          {104, 0x14},
722          {98, 0x14},
723          {110, 0x13},
724          {104, 0x13},
725          {98, 0x13},
726          {110, 0x12},
727          {104, 0x08},
728          {98, 0x08},
729          {110, 0x07},
730          {104, 0x07},
731          {98, 0x07},
732          {110, 0x06},
733          {104, 0x06},
734          {98, 0x06},
735          {110, 0x05},
736          {104, 0x05},
737          {98, 0x05},
738          {110, 0x04},
739          {104, 0x04},
740          {98, 0x04},
741          {110, 0x03},
742          {104, 0x03},
743          {98, 0x03},
744          {110, 0x02},
745          {104, 0x02},
746          {98, 0x02},
747          {110, 0x01},
748          {104, 0x01},
749          {98, 0x01},
750          {110, 0x00},
751          {104, 0x00},
752          {98, 0x00},
753          {93, 0x00},
754          {88, 0x00},
755          {83, 0x00},
756          {78, 0x00},
757          },
758         /* 2.4GHz power gain index table */
759         {
760          {110, 0x3f},           /* highest txpower */
761          {104, 0x3f},
762          {98, 0x3f},
763          {110, 0x3e},
764          {104, 0x3e},
765          {98, 0x3e},
766          {110, 0x3d},
767          {104, 0x3d},
768          {98, 0x3d},
769          {110, 0x3c},
770          {104, 0x3c},
771          {98, 0x3c},
772          {110, 0x3b},
773          {104, 0x3b},
774          {98, 0x3b},
775          {110, 0x3a},
776          {104, 0x3a},
777          {98, 0x3a},
778          {110, 0x39},
779          {104, 0x39},
780          {98, 0x39},
781          {110, 0x38},
782          {104, 0x38},
783          {98, 0x38},
784          {110, 0x37},
785          {104, 0x37},
786          {98, 0x37},
787          {110, 0x36},
788          {104, 0x36},
789          {98, 0x36},
790          {110, 0x35},
791          {104, 0x35},
792          {98, 0x35},
793          {110, 0x34},
794          {104, 0x34},
795          {98, 0x34},
796          {110, 0x33},
797          {104, 0x33},
798          {98, 0x33},
799          {110, 0x32},
800          {104, 0x32},
801          {98, 0x32},
802          {110, 0x31},
803          {104, 0x31},
804          {98, 0x31},
805          {110, 0x30},
806          {104, 0x30},
807          {98, 0x30},
808          {110, 0x6},
809          {104, 0x6},
810          {98, 0x6},
811          {110, 0x5},
812          {104, 0x5},
813          {98, 0x5},
814          {110, 0x4},
815          {104, 0x4},
816          {98, 0x4},
817          {110, 0x3},
818          {104, 0x3},
819          {98, 0x3},
820          {110, 0x2},
821          {104, 0x2},
822          {98, 0x2},
823          {110, 0x1},
824          {104, 0x1},
825          {98, 0x1},
826          {110, 0x0},
827          {104, 0x0},
828          {98, 0x0},
829          {97, 0},
830          {96, 0},
831          {95, 0},
832          {94, 0},
833          {93, 0},
834          {92, 0},
835          {91, 0},
836          {90, 0},
837          {89, 0},
838          {88, 0},
839          {87, 0},
840          {86, 0},
841          {85, 0},
842          {84, 0},
843          {83, 0},
844          {82, 0},
845          {81, 0},
846          {80, 0},
847          {79, 0},
848          {78, 0},
849          {77, 0},
850          {76, 0},
851          {75, 0},
852          {74, 0},
853          {73, 0},
854          {72, 0},
855          {71, 0},
856          {70, 0},
857          {69, 0},
858          {68, 0},
859          {67, 0},
860          {66, 0},
861          {65, 0},
862          {64, 0},
863          {63, 0},
864          {62, 0},
865          {61, 0},
866          {60, 0},
867          {59, 0},
868          }
869 };
870
871 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
872                                     u8 is_ht40, u8 ctrl_chan_high,
873                                     struct iwl4965_tx_power_db *tx_power_tbl)
874 {
875         u8 saturation_power;
876         s32 target_power;
877         s32 user_target_power;
878         s32 power_limit;
879         s32 current_temp;
880         s32 reg_limit;
881         s32 current_regulatory;
882         s32 txatten_grp = CALIB_CH_GROUP_MAX;
883         int i;
884         int c;
885         const struct iwl_channel_info *ch_info = NULL;
886         struct iwl_eeprom_calib_ch_info ch_eeprom_info;
887         const struct iwl_eeprom_calib_measure *measurement;
888         s16 voltage;
889         s32 init_voltage;
890         s32 voltage_compensation;
891         s32 degrees_per_05db_num;
892         s32 degrees_per_05db_denom;
893         s32 factory_temp;
894         s32 temperature_comp[2];
895         s32 factory_gain_index[2];
896         s32 factory_actual_pwr[2];
897         s32 power_index;
898
899         /* tx_power_user_lmt is in dBm, convert to half-dBm (half-dB units
900          *   are used for indexing into txpower table) */
901         user_target_power = 2 * priv->tx_power_user_lmt;
902
903         /* Get current (RXON) channel, band, width */
904         IWL_DEBUG_TXPOWER(priv, "chan %d band %d is_ht40 %d\n", channel, band,
905                           is_ht40);
906
907         ch_info = iwl_legacy_get_channel_info(priv, priv->band, channel);
908
909         if (!iwl_legacy_is_channel_valid(ch_info))
910                 return -EINVAL;
911
912         /* get txatten group, used to select 1) thermal txpower adjustment
913          *   and 2) mimo txpower balance between Tx chains. */
914         txatten_grp = iwl4965_get_tx_atten_grp(channel);
915         if (txatten_grp < 0) {
916                 IWL_ERR(priv, "Can't find txatten group for channel %d.\n",
917                           channel);
918                 return txatten_grp;
919         }
920
921         IWL_DEBUG_TXPOWER(priv, "channel %d belongs to txatten group %d\n",
922                           channel, txatten_grp);
923
924         if (is_ht40) {
925                 if (ctrl_chan_high)
926                         channel -= 2;
927                 else
928                         channel += 2;
929         }
930
931         /* hardware txpower limits ...
932          * saturation (clipping distortion) txpowers are in half-dBm */
933         if (band)
934                 saturation_power = priv->calib_info->saturation_power24;
935         else
936                 saturation_power = priv->calib_info->saturation_power52;
937
938         if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
939             saturation_power > IWL_TX_POWER_SATURATION_MAX) {
940                 if (band)
941                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
942                 else
943                         saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
944         }
945
946         /* regulatory txpower limits ... reg_limit values are in half-dBm,
947          *   max_power_avg values are in dBm, convert * 2 */
948         if (is_ht40)
949                 reg_limit = ch_info->ht40_max_power_avg * 2;
950         else
951                 reg_limit = ch_info->max_power_avg * 2;
952
953         if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
954             (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
955                 if (band)
956                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
957                 else
958                         reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
959         }
960
961         /* Interpolate txpower calibration values for this channel,
962          *   based on factory calibration tests on spaced channels. */
963         iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
964
965         /* calculate tx gain adjustment based on power supply voltage */
966         voltage = le16_to_cpu(priv->calib_info->voltage);
967         init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
968         voltage_compensation =
969             iwl4965_get_voltage_compensation(voltage, init_voltage);
970
971         IWL_DEBUG_TXPOWER(priv, "curr volt %d eeprom volt %d volt comp %d\n",
972                           init_voltage,
973                           voltage, voltage_compensation);
974
975         /* get current temperature (Celsius) */
976         current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
977         current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
978         current_temp = KELVIN_TO_CELSIUS(current_temp);
979
980         /* select thermal txpower adjustment params, based on channel group
981          *   (same frequency group used for mimo txatten adjustment) */
982         degrees_per_05db_num =
983             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
984         degrees_per_05db_denom =
985             tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
986
987         /* get per-chain txpower values from factory measurements */
988         for (c = 0; c < 2; c++) {
989                 measurement = &ch_eeprom_info.measurements[c][1];
990
991                 /* txgain adjustment (in half-dB steps) based on difference
992                  *   between factory and current temperature */
993                 factory_temp = measurement->temperature;
994                 iwl4965_math_div_round((current_temp - factory_temp) *
995                                        degrees_per_05db_denom,
996                                        degrees_per_05db_num,
997                                        &temperature_comp[c]);
998
999                 factory_gain_index[c] = measurement->gain_idx;
1000                 factory_actual_pwr[c] = measurement->actual_pow;
1001
1002                 IWL_DEBUG_TXPOWER(priv, "chain = %d\n", c);
1003                 IWL_DEBUG_TXPOWER(priv, "fctry tmp %d, "
1004                                   "curr tmp %d, comp %d steps\n",
1005                                   factory_temp, current_temp,
1006                                   temperature_comp[c]);
1007
1008                 IWL_DEBUG_TXPOWER(priv, "fctry idx %d, fctry pwr %d\n",
1009                                   factory_gain_index[c],
1010                                   factory_actual_pwr[c]);
1011         }
1012
1013         /* for each of 33 bit-rates (including 1 for CCK) */
1014         for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1015                 u8 is_mimo_rate;
1016                 union iwl4965_tx_power_dual_stream tx_power;
1017
1018                 /* for mimo, reduce each chain's txpower by half
1019                  * (3dB, 6 steps), so total output power is regulatory
1020                  * compliant. */
1021                 if (i & 0x8) {
1022                         current_regulatory = reg_limit -
1023                             IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1024                         is_mimo_rate = 1;
1025                 } else {
1026                         current_regulatory = reg_limit;
1027                         is_mimo_rate = 0;
1028                 }
1029
1030                 /* find txpower limit, either hardware or regulatory */
1031                 power_limit = saturation_power - back_off_table[i];
1032                 if (power_limit > current_regulatory)
1033                         power_limit = current_regulatory;
1034
1035                 /* reduce user's txpower request if necessary
1036                  * for this rate on this channel */
1037                 target_power = user_target_power;
1038                 if (target_power > power_limit)
1039                         target_power = power_limit;
1040
1041                 IWL_DEBUG_TXPOWER(priv, "rate %d sat %d reg %d usr %d tgt %d\n",
1042                                   i, saturation_power - back_off_table[i],
1043                                   current_regulatory, user_target_power,
1044                                   target_power);
1045
1046                 /* for each of 2 Tx chains (radio transmitters) */
1047                 for (c = 0; c < 2; c++) {
1048                         s32 atten_value;
1049
1050                         if (is_mimo_rate)
1051                                 atten_value =
1052                                     (s32)le32_to_cpu(priv->card_alive_init.
1053                                     tx_atten[txatten_grp][c]);
1054                         else
1055                                 atten_value = 0;
1056
1057                         /* calculate index; higher index means lower txpower */
1058                         power_index = (u8) (factory_gain_index[c] -
1059                                             (target_power -
1060                                              factory_actual_pwr[c]) -
1061                                             temperature_comp[c] -
1062                                             voltage_compensation +
1063                                             atten_value);
1064
1065 /*                      IWL_DEBUG_TXPOWER(priv, "calculated txpower index %d\n",
1066                                                 power_index); */
1067
1068                         if (power_index < get_min_power_index(i, band))
1069                                 power_index = get_min_power_index(i, band);
1070
1071                         /* adjust 5 GHz index to support negative indexes */
1072                         if (!band)
1073                                 power_index += 9;
1074
1075                         /* CCK, rate 32, reduce txpower for CCK */
1076                         if (i == POWER_TABLE_CCK_ENTRY)
1077                                 power_index +=
1078                                     IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1079
1080                         /* stay within the table! */
1081                         if (power_index > 107) {
1082                                 IWL_WARN(priv, "txpower index %d > 107\n",
1083                                             power_index);
1084                                 power_index = 107;
1085                         }
1086                         if (power_index < 0) {
1087                                 IWL_WARN(priv, "txpower index %d < 0\n",
1088                                             power_index);
1089                                 power_index = 0;
1090                         }
1091
1092                         /* fill txpower command for this rate/chain */
1093                         tx_power.s.radio_tx_gain[c] =
1094                                 gain_table[band][power_index].radio;
1095                         tx_power.s.dsp_predis_atten[c] =
1096                                 gain_table[band][power_index].dsp;
1097
1098                         IWL_DEBUG_TXPOWER(priv, "chain %d mimo %d index %d "
1099                                           "gain 0x%02x dsp %d\n",
1100                                           c, atten_value, power_index,
1101                                         tx_power.s.radio_tx_gain[c],
1102                                         tx_power.s.dsp_predis_atten[c]);
1103                 } /* for each chain */
1104
1105                 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1106
1107         } /* for each rate */
1108
1109         return 0;
1110 }
1111
1112 /**
1113  * iwl4965_send_tx_power - Configure the TXPOWER level user limit
1114  *
1115  * Uses the active RXON for channel, band, and characteristics (ht40, high)
1116  * The power limit is taken from priv->tx_power_user_lmt.
1117  */
1118 static int iwl4965_send_tx_power(struct iwl_priv *priv)
1119 {
1120         struct iwl4965_txpowertable_cmd cmd = { 0 };
1121         int ret;
1122         u8 band = 0;
1123         bool is_ht40 = false;
1124         u8 ctrl_chan_high = 0;
1125         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1126
1127         if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
1128                       "TX Power requested while scanning!\n"))
1129                 return -EAGAIN;
1130
1131         band = priv->band == IEEE80211_BAND_2GHZ;
1132
1133         is_ht40 = iw4965_is_ht40_channel(ctx->active.flags);
1134
1135         if (is_ht40 && (ctx->active.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1136                 ctrl_chan_high = 1;
1137
1138         cmd.band = band;
1139         cmd.channel = ctx->active.channel;
1140
1141         ret = iwl4965_fill_txpower_tbl(priv, band,
1142                                 le16_to_cpu(ctx->active.channel),
1143                                 is_ht40, ctrl_chan_high, &cmd.tx_power);
1144         if (ret)
1145                 goto out;
1146
1147         ret = iwl_legacy_send_cmd_pdu(priv,
1148                          REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1149
1150 out:
1151         return ret;
1152 }
1153
1154 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv,
1155                                    struct iwl_rxon_context *ctx)
1156 {
1157         int ret = 0;
1158         struct iwl4965_rxon_assoc_cmd rxon_assoc;
1159         const struct iwl_legacy_rxon_cmd *rxon1 = &ctx->staging;
1160         const struct iwl_legacy_rxon_cmd *rxon2 = &ctx->active;
1161
1162         if ((rxon1->flags == rxon2->flags) &&
1163             (rxon1->filter_flags == rxon2->filter_flags) &&
1164             (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1165             (rxon1->ofdm_ht_single_stream_basic_rates ==
1166              rxon2->ofdm_ht_single_stream_basic_rates) &&
1167             (rxon1->ofdm_ht_dual_stream_basic_rates ==
1168              rxon2->ofdm_ht_dual_stream_basic_rates) &&
1169             (rxon1->rx_chain == rxon2->rx_chain) &&
1170             (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1171                 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC.  Not resending.\n");
1172                 return 0;
1173         }
1174
1175         rxon_assoc.flags = ctx->staging.flags;
1176         rxon_assoc.filter_flags = ctx->staging.filter_flags;
1177         rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
1178         rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
1179         rxon_assoc.reserved = 0;
1180         rxon_assoc.ofdm_ht_single_stream_basic_rates =
1181             ctx->staging.ofdm_ht_single_stream_basic_rates;
1182         rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1183             ctx->staging.ofdm_ht_dual_stream_basic_rates;
1184         rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
1185
1186         ret = iwl_legacy_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1187                                      sizeof(rxon_assoc), &rxon_assoc, NULL);
1188
1189         return ret;
1190 }
1191
1192 static int iwl4965_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1193 {
1194         /* cast away the const for active_rxon in this function */
1195         struct iwl_legacy_rxon_cmd *active_rxon = (void *)&ctx->active;
1196         int ret;
1197         bool new_assoc =
1198                 !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1199
1200         if (!iwl_legacy_is_alive(priv))
1201                 return -EBUSY;
1202
1203         if (!ctx->is_active)
1204                 return 0;
1205
1206         /* always get timestamp with Rx frame */
1207         ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1208
1209         ret = iwl_legacy_check_rxon_cmd(priv, ctx);
1210         if (ret) {
1211                 IWL_ERR(priv, "Invalid RXON configuration.  Not committing.\n");
1212                 return -EINVAL;
1213         }
1214
1215         /*
1216          * receive commit_rxon request
1217          * abort any previous channel switch if still in process
1218          */
1219         if (priv->switch_rxon.switch_in_progress &&
1220             (priv->switch_rxon.channel != ctx->staging.channel)) {
1221                 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1222                       le16_to_cpu(priv->switch_rxon.channel));
1223                 iwl_legacy_chswitch_done(priv, false);
1224         }
1225
1226         /* If we don't need to send a full RXON, we can use
1227          * iwl_rxon_assoc_cmd which is used to reconfigure filter
1228          * and other flags for the current radio configuration. */
1229         if (!iwl_legacy_full_rxon_required(priv, ctx)) {
1230                 ret = iwl_legacy_send_rxon_assoc(priv, ctx);
1231                 if (ret) {
1232                         IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1233                         return ret;
1234                 }
1235
1236                 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1237                 iwl_legacy_print_rx_config_cmd(priv, ctx);
1238                 goto set_tx_power;
1239         }
1240
1241         /* If we are currently associated and the new config requires
1242          * an RXON_ASSOC and the new config wants the associated mask enabled,
1243          * we must clear the associated from the active configuration
1244          * before we apply the new config */
1245         if (iwl_legacy_is_associated_ctx(ctx) && new_assoc) {
1246                 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
1247                 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1248
1249                 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1250                                        sizeof(struct iwl_legacy_rxon_cmd),
1251                                        active_rxon);
1252
1253                 /* If the mask clearing failed then we set
1254                  * active_rxon back to what it was previously */
1255                 if (ret) {
1256                         active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1257                         IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
1258                         return ret;
1259                 }
1260                 iwl_legacy_clear_ucode_stations(priv, ctx);
1261                 iwl_legacy_restore_stations(priv, ctx);
1262                 ret = iwl4965_restore_default_wep_keys(priv, ctx);
1263                 if (ret) {
1264                         IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
1265                         return ret;
1266                 }
1267         }
1268
1269         IWL_DEBUG_INFO(priv, "Sending RXON\n"
1270                        "* with%s RXON_FILTER_ASSOC_MSK\n"
1271                        "* channel = %d\n"
1272                        "* bssid = %pM\n",
1273                        (new_assoc ? "" : "out"),
1274                        le16_to_cpu(ctx->staging.channel),
1275                        ctx->staging.bssid_addr);
1276
1277         iwl_legacy_set_rxon_hwcrypto(priv, ctx,
1278                                 !priv->cfg->mod_params->sw_crypto);
1279
1280         /* Apply the new configuration
1281          * RXON unassoc clears the station table in uCode so restoration of
1282          * stations is needed after it (the RXON command) completes
1283          */
1284         if (!new_assoc) {
1285                 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1286                               sizeof(struct iwl_legacy_rxon_cmd), &ctx->staging);
1287                 if (ret) {
1288                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
1289                         return ret;
1290                 }
1291                 IWL_DEBUG_INFO(priv, "Return from !new_assoc RXON.\n");
1292                 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1293                 iwl_legacy_clear_ucode_stations(priv, ctx);
1294                 iwl_legacy_restore_stations(priv, ctx);
1295                 ret = iwl4965_restore_default_wep_keys(priv, ctx);
1296                 if (ret) {
1297                         IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
1298                         return ret;
1299                 }
1300         }
1301         if (new_assoc) {
1302                 priv->start_calib = 0;
1303                 /* Apply the new configuration
1304                  * RXON assoc doesn't clear the station table in uCode,
1305                  */
1306                 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1307                               sizeof(struct iwl_legacy_rxon_cmd), &ctx->staging);
1308                 if (ret) {
1309                         IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
1310                         return ret;
1311                 }
1312                 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1313         }
1314         iwl_legacy_print_rx_config_cmd(priv, ctx);
1315
1316         iwl4965_init_sensitivity(priv);
1317
1318 set_tx_power:
1319         /* If we issue a new RXON command which required a tune then we must
1320          * send a new TXPOWER command or we won't be able to Tx any frames */
1321         ret = iwl_legacy_set_tx_power(priv, priv->tx_power_next, true);
1322         if (ret) {
1323                 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
1324                 return ret;
1325         }
1326
1327         return 0;
1328 }
1329
1330 static int iwl4965_hw_channel_switch(struct iwl_priv *priv,
1331                                      struct ieee80211_channel_switch *ch_switch)
1332 {
1333         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1334         int rc;
1335         u8 band = 0;
1336         bool is_ht40 = false;
1337         u8 ctrl_chan_high = 0;
1338         struct iwl4965_channel_switch_cmd cmd;
1339         const struct iwl_channel_info *ch_info;
1340         u32 switch_time_in_usec, ucode_switch_time;
1341         u16 ch;
1342         u32 tsf_low;
1343         u8 switch_count;
1344         u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
1345         struct ieee80211_vif *vif = ctx->vif;
1346         band = priv->band == IEEE80211_BAND_2GHZ;
1347
1348         is_ht40 = iw4965_is_ht40_channel(ctx->staging.flags);
1349
1350         if (is_ht40 &&
1351             (ctx->staging.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1352                 ctrl_chan_high = 1;
1353
1354         cmd.band = band;
1355         cmd.expect_beacon = 0;
1356         ch = ch_switch->channel->hw_value;
1357         cmd.channel = cpu_to_le16(ch);
1358         cmd.rxon_flags = ctx->staging.flags;
1359         cmd.rxon_filter_flags = ctx->staging.filter_flags;
1360         switch_count = ch_switch->count;
1361         tsf_low = ch_switch->timestamp & 0x0ffffffff;
1362         /*
1363          * calculate the ucode channel switch time
1364          * adding TSF as one of the factor for when to switch
1365          */
1366         if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
1367                 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
1368                     beacon_interval)) {
1369                         switch_count -= (priv->ucode_beacon_time -
1370                                 tsf_low) / beacon_interval;
1371                 } else
1372                         switch_count = 0;
1373         }
1374         if (switch_count <= 1)
1375                 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1376         else {
1377                 switch_time_in_usec =
1378                         vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
1379                 ucode_switch_time = iwl_legacy_usecs_to_beacons(priv,
1380                                                          switch_time_in_usec,
1381                                                          beacon_interval);
1382                 cmd.switch_time = iwl_legacy_add_beacon_time(priv,
1383                                                       priv->ucode_beacon_time,
1384                                                       ucode_switch_time,
1385                                                       beacon_interval);
1386         }
1387         IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
1388                       cmd.switch_time);
1389         ch_info = iwl_legacy_get_channel_info(priv, priv->band, ch);
1390         if (ch_info)
1391                 cmd.expect_beacon = iwl_legacy_is_channel_radar(ch_info);
1392         else {
1393                 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
1394                         ctx->active.channel, ch);
1395                 return -EFAULT;
1396         }
1397
1398         rc = iwl4965_fill_txpower_tbl(priv, band, ch, is_ht40,
1399                                       ctrl_chan_high, &cmd.tx_power);
1400         if (rc) {
1401                 IWL_DEBUG_11H(priv, "error:%d  fill txpower_tbl\n", rc);
1402                 return rc;
1403         }
1404
1405         priv->switch_rxon.channel = cmd.channel;
1406         priv->switch_rxon.switch_in_progress = true;
1407
1408         return iwl_legacy_send_cmd_pdu(priv,
1409                          REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1410 }
1411
1412 /**
1413  * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1414  */
1415 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1416                                             struct iwl_tx_queue *txq,
1417                                             u16 byte_cnt)
1418 {
1419         struct iwl4965_scd_bc_tbl *scd_bc_tbl = priv->scd_bc_tbls.addr;
1420         int txq_id = txq->q.id;
1421         int write_ptr = txq->q.write_ptr;
1422         int len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1423         __le16 bc_ent;
1424
1425         WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);
1426
1427         bc_ent = cpu_to_le16(len & 0xFFF);
1428         /* Set up byte count within first 256 entries */
1429         scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
1430
1431         /* If within first 64 entries, duplicate at end */
1432         if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
1433                 scd_bc_tbl[txq_id].
1434                         tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent;
1435 }
1436
1437 /**
1438  * iwl4965_hw_get_temperature - return the calibrated temperature (in Kelvin)
1439  * @statistics: Provides the temperature reading from the uCode
1440  *
1441  * A return of <0 indicates bogus data in the statistics
1442  */
1443 static int iwl4965_hw_get_temperature(struct iwl_priv *priv)
1444 {
1445         s32 temperature;
1446         s32 vt;
1447         s32 R1, R2, R3;
1448         u32 R4;
1449
1450         if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1451             (priv->_4965.statistics.flag &
1452                         STATISTICS_REPLY_FLG_HT40_MODE_MSK)) {
1453                 IWL_DEBUG_TEMP(priv, "Running HT40 temperature calibration\n");
1454                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1455                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1456                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1457                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1458         } else {
1459                 IWL_DEBUG_TEMP(priv, "Running temperature calibration\n");
1460                 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1461                 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1462                 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1463                 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1464         }
1465
1466         /*
1467          * Temperature is only 23 bits, so sign extend out to 32.
1468          *
1469          * NOTE If we haven't received a statistics notification yet
1470          * with an updated temperature, use R4 provided to us in the
1471          * "initialize" ALIVE response.
1472          */
1473         if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1474                 vt = sign_extend32(R4, 23);
1475         else
1476                 vt = sign_extend32(le32_to_cpu(priv->_4965.statistics.
1477                                  general.common.temperature), 23);
1478
1479         IWL_DEBUG_TEMP(priv, "Calib values R[1-3]: %d %d %d R4: %d\n", R1, R2, R3, vt);
1480
1481         if (R3 == R1) {
1482                 IWL_ERR(priv, "Calibration conflict R1 == R3\n");
1483                 return -1;
1484         }
1485
1486         /* Calculate temperature in degrees Kelvin, adjust by 97%.
1487          * Add offset to center the adjustment around 0 degrees Centigrade. */
1488         temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
1489         temperature /= (R3 - R1);
1490         temperature = (temperature * 97) / 100 + TEMPERATURE_CALIB_KELVIN_OFFSET;
1491
1492         IWL_DEBUG_TEMP(priv, "Calibrated temperature: %dK, %dC\n",
1493                         temperature, KELVIN_TO_CELSIUS(temperature));
1494
1495         return temperature;
1496 }
1497
1498 /* Adjust Txpower only if temperature variance is greater than threshold. */
1499 #define IWL_TEMPERATURE_THRESHOLD   3
1500
1501 /**
1502  * iwl4965_is_temp_calib_needed - determines if new calibration is needed
1503  *
1504  * If the temperature changed has changed sufficiently, then a recalibration
1505  * is needed.
1506  *
1507  * Assumes caller will replace priv->last_temperature once calibration
1508  * executed.
1509  */
1510 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
1511 {
1512         int temp_diff;
1513
1514         if (!test_bit(STATUS_STATISTICS, &priv->status)) {
1515                 IWL_DEBUG_TEMP(priv, "Temperature not updated -- no statistics.\n");
1516                 return 0;
1517         }
1518
1519         temp_diff = priv->temperature - priv->last_temperature;
1520
1521         /* get absolute value */
1522         if (temp_diff < 0) {
1523                 IWL_DEBUG_POWER(priv, "Getting cooler, delta %d\n", temp_diff);
1524                 temp_diff = -temp_diff;
1525         } else if (temp_diff == 0)
1526                 IWL_DEBUG_POWER(priv, "Temperature unchanged\n");
1527         else
1528                 IWL_DEBUG_POWER(priv, "Getting warmer, delta %d\n", temp_diff);
1529
1530         if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
1531                 IWL_DEBUG_POWER(priv, " => thermal txpower calib not needed\n");
1532                 return 0;
1533         }
1534
1535         IWL_DEBUG_POWER(priv, " => thermal txpower calib needed\n");
1536
1537         return 1;
1538 }
1539
1540 static void iwl4965_temperature_calib(struct iwl_priv *priv)
1541 {
1542         s32 temp;
1543
1544         temp = iwl4965_hw_get_temperature(priv);
1545         if (IWL_TX_POWER_TEMPERATURE_OUT_OF_RANGE(temp))
1546                 return;
1547
1548         if (priv->temperature != temp) {
1549                 if (priv->temperature)
1550                         IWL_DEBUG_TEMP(priv, "Temperature changed "
1551                                        "from %dC to %dC\n",
1552                                        KELVIN_TO_CELSIUS(priv->temperature),
1553                                        KELVIN_TO_CELSIUS(temp));
1554                 else
1555                         IWL_DEBUG_TEMP(priv, "Temperature "
1556                                        "initialized to %dC\n",
1557                                        KELVIN_TO_CELSIUS(temp));
1558         }
1559
1560         priv->temperature = temp;
1561         set_bit(STATUS_TEMPERATURE, &priv->status);
1562
1563         if (!priv->disable_tx_power_cal &&
1564              unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
1565              iwl4965_is_temp_calib_needed(priv))
1566                 queue_work(priv->workqueue, &priv->txpower_work);
1567 }
1568
1569 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
1570 {
1571         switch (cmd_id) {
1572         case REPLY_RXON:
1573                 return (u16) sizeof(struct iwl4965_rxon_cmd);
1574         default:
1575                 return len;
1576         }
1577 }
1578
1579 static u16 iwl4965_build_addsta_hcmd(const struct iwl_legacy_addsta_cmd *cmd,
1580                                                                 u8 *data)
1581 {
1582         struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
1583         addsta->mode = cmd->mode;
1584         memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
1585         memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
1586         addsta->station_flags = cmd->station_flags;
1587         addsta->station_flags_msk = cmd->station_flags_msk;
1588         addsta->tid_disable_tx = cmd->tid_disable_tx;
1589         addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
1590         addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
1591         addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
1592         addsta->sleep_tx_count = cmd->sleep_tx_count;
1593         addsta->reserved1 = cpu_to_le16(0);
1594         addsta->reserved2 = cpu_to_le16(0);
1595
1596         return (u16)sizeof(struct iwl4965_addsta_cmd);
1597 }
1598
1599 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
1600 {
1601         return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
1602 }
1603
1604 /**
1605  * iwl4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
1606  */
1607 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
1608                                       struct iwl_ht_agg *agg,
1609                                       struct iwl4965_tx_resp *tx_resp,
1610                                       int txq_id, u16 start_idx)
1611 {
1612         u16 status;
1613         struct agg_tx_status *frame_status = tx_resp->u.agg_status;
1614         struct ieee80211_tx_info *info = NULL;
1615         struct ieee80211_hdr *hdr = NULL;
1616         u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
1617         int i, sh, idx;
1618         u16 seq;
1619         if (agg->wait_for_ba)
1620                 IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
1621
1622         agg->frame_count = tx_resp->frame_count;
1623         agg->start_idx = start_idx;
1624         agg->rate_n_flags = rate_n_flags;
1625         agg->bitmap = 0;
1626
1627         /* num frames attempted by Tx command */
1628         if (agg->frame_count == 1) {
1629                 /* Only one frame was attempted; no block-ack will arrive */
1630                 status = le16_to_cpu(frame_status[0].status);
1631                 idx = start_idx;
1632
1633                 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
1634                                    agg->frame_count, agg->start_idx, idx);
1635
1636                 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb);
1637                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1638                 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1639                 info->flags |= iwl4965_tx_status_to_mac80211(status);
1640                 iwl4965_hwrate_to_tx_control(priv, rate_n_flags, info);
1641
1642                 IWL_DEBUG_TX_REPLY(priv, "1 Frame 0x%x failure :%d\n",
1643                                     status & 0xff, tx_resp->failure_frame);
1644                 IWL_DEBUG_TX_REPLY(priv, "Rate Info rate_n_flags=%x\n", rate_n_flags);
1645
1646                 agg->wait_for_ba = 0;
1647         } else {
1648                 /* Two or more frames were attempted; expect block-ack */
1649                 u64 bitmap = 0;
1650                 int start = agg->start_idx;
1651
1652                 /* Construct bit-map of pending frames within Tx window */
1653                 for (i = 0; i < agg->frame_count; i++) {
1654                         u16 sc;
1655                         status = le16_to_cpu(frame_status[i].status);
1656                         seq  = le16_to_cpu(frame_status[i].sequence);
1657                         idx = SEQ_TO_INDEX(seq);
1658                         txq_id = SEQ_TO_QUEUE(seq);
1659
1660                         if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
1661                                       AGG_TX_STATE_ABORT_MSK))
1662                                 continue;
1663
1664                         IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
1665                                            agg->frame_count, txq_id, idx);
1666
1667                         hdr = iwl_legacy_tx_queue_get_hdr(priv, txq_id, idx);
1668                         if (!hdr) {
1669                                 IWL_ERR(priv,
1670                                         "BUG_ON idx doesn't point to valid skb"
1671                                         " idx=%d, txq_id=%d\n", idx, txq_id);
1672                                 return -1;
1673                         }
1674
1675                         sc = le16_to_cpu(hdr->seq_ctrl);
1676                         if (idx != (SEQ_TO_SN(sc) & 0xff)) {
1677                                 IWL_ERR(priv,
1678                                         "BUG_ON idx doesn't match seq control"
1679                                         " idx=%d, seq_idx=%d, seq=%d\n",
1680                                         idx, SEQ_TO_SN(sc), hdr->seq_ctrl);
1681                                 return -1;
1682                         }
1683
1684                         IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
1685                                            i, idx, SEQ_TO_SN(sc));
1686
1687                         sh = idx - start;
1688                         if (sh > 64) {
1689                                 sh = (start - idx) + 0xff;
1690                                 bitmap = bitmap << sh;
1691                                 sh = 0;
1692                                 start = idx;
1693                         } else if (sh < -64)
1694                                 sh  = 0xff - (start - idx);
1695                         else if (sh < 0) {
1696                                 sh = start - idx;
1697                                 start = idx;
1698                                 bitmap = bitmap << sh;
1699                                 sh = 0;
1700                         }
1701                         bitmap |= 1ULL << sh;
1702                         IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
1703                                            start, (unsigned long long)bitmap);
1704                 }
1705
1706                 agg->bitmap = bitmap;
1707                 agg->start_idx = start;
1708                 IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
1709                                    agg->frame_count, agg->start_idx,
1710                                    (unsigned long long)agg->bitmap);
1711
1712                 if (bitmap)
1713                         agg->wait_for_ba = 1;
1714         }
1715         return 0;
1716 }
1717
1718 static u8 iwl4965_find_station(struct iwl_priv *priv, const u8 *addr)
1719 {
1720         int i;
1721         int start = 0;
1722         int ret = IWL_INVALID_STATION;
1723         unsigned long flags;
1724
1725         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC))
1726                 start = IWL_STA_ID;
1727
1728         if (is_broadcast_ether_addr(addr))
1729                 return priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;
1730
1731         spin_lock_irqsave(&priv->sta_lock, flags);
1732         for (i = start; i < priv->hw_params.max_stations; i++)
1733                 if (priv->stations[i].used &&
1734                     (!compare_ether_addr(priv->stations[i].sta.sta.addr,
1735                                          addr))) {
1736                         ret = i;
1737                         goto out;
1738                 }
1739
1740         IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
1741                               addr, priv->num_stations);
1742
1743  out:
1744         /*
1745          * It may be possible that more commands interacting with stations
1746          * arrive before we completed processing the adding of
1747          * station
1748          */
1749         if (ret != IWL_INVALID_STATION &&
1750             (!(priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) ||
1751              ((priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) &&
1752               (priv->stations[ret].used & IWL_STA_UCODE_INPROGRESS)))) {
1753                 IWL_ERR(priv, "Requested station info for sta %d before ready.\n",
1754                         ret);
1755                 ret = IWL_INVALID_STATION;
1756         }
1757         spin_unlock_irqrestore(&priv->sta_lock, flags);
1758         return ret;
1759 }
1760
1761 static int iwl4965_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1762 {
1763         if (priv->iw_mode == NL80211_IFTYPE_STATION) {
1764                 return IWL_AP_ID;
1765         } else {
1766                 u8 *da = ieee80211_get_DA(hdr);
1767                 return iwl4965_find_station(priv, da);
1768         }
1769 }
1770
1771 /**
1772  * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
1773  */
1774 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
1775                                 struct iwl_rx_mem_buffer *rxb)
1776 {
1777         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1778         u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1779         int txq_id = SEQ_TO_QUEUE(sequence);
1780         int index = SEQ_TO_INDEX(sequence);
1781         struct iwl_tx_queue *txq = &priv->txq[txq_id];
1782         struct ieee80211_hdr *hdr;
1783         struct ieee80211_tx_info *info;
1784         struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
1785         u32  status = le32_to_cpu(tx_resp->u.status);
1786         int uninitialized_var(tid);
1787         int sta_id;
1788         int freed;
1789         u8 *qc = NULL;
1790         unsigned long flags;
1791
1792         if ((index >= txq->q.n_bd) || (iwl_legacy_queue_used(&txq->q, index) == 0)) {
1793                 IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
1794                           "is out of range [0-%d] %d %d\n", txq_id,
1795                           index, txq->q.n_bd, txq->q.write_ptr,
1796                           txq->q.read_ptr);
1797                 return;
1798         }
1799
1800         txq->time_stamp = jiffies;
1801         info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb);
1802         memset(&info->status, 0, sizeof(info->status));
1803
1804         hdr = iwl_legacy_tx_queue_get_hdr(priv, txq_id, index);
1805         if (ieee80211_is_data_qos(hdr->frame_control)) {
1806                 qc = ieee80211_get_qos_ctl(hdr);
1807                 tid = qc[0] & 0xf;
1808         }
1809
1810         sta_id = iwl4965_get_ra_sta_id(priv, hdr);
1811         if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
1812                 IWL_ERR(priv, "Station not known\n");
1813                 return;
1814         }
1815
1816         spin_lock_irqsave(&priv->sta_lock, flags);
1817         if (txq->sched_retry) {
1818                 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
1819                 struct iwl_ht_agg *agg = NULL;
1820                 WARN_ON(!qc);
1821
1822                 agg = &priv->stations[sta_id].tid[tid].agg;
1823
1824                 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
1825
1826                 /* check if BAR is needed */
1827                 if ((tx_resp->frame_count == 1) && !iwl4965_is_tx_success(status))
1828                         info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1829
1830                 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
1831                         index = iwl_legacy_queue_dec_wrap(scd_ssn & 0xff,
1832                                                                 txq->q.n_bd);
1833                         IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim scd_ssn "
1834                                            "%d index %d\n", scd_ssn , index);
1835                         freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
1836                         if (qc)
1837                                 iwl4965_free_tfds_in_queue(priv, sta_id,
1838                                                        tid, freed);
1839
1840                         if (priv->mac80211_registered &&
1841                             (iwl_legacy_queue_space(&txq->q) > txq->q.low_mark)
1842                                  && (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
1843                                 iwl_legacy_wake_queue(priv, txq);
1844                 }
1845         } else {
1846                 info->status.rates[0].count = tx_resp->failure_frame + 1;
1847                 info->flags |= iwl4965_tx_status_to_mac80211(status);
1848                 iwl4965_hwrate_to_tx_control(priv,
1849                                         le32_to_cpu(tx_resp->rate_n_flags),
1850                                         info);
1851
1852                 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) "
1853                                    "rate_n_flags 0x%x retries %d\n",
1854                                    txq_id,
1855                                    iwl4965_get_tx_fail_reason(status), status,
1856                                    le32_to_cpu(tx_resp->rate_n_flags),
1857                                    tx_resp->failure_frame);
1858
1859                 freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
1860                 if (qc && likely(sta_id != IWL_INVALID_STATION))
1861                         iwl4965_free_tfds_in_queue(priv, sta_id, tid, freed);
1862                 else if (sta_id == IWL_INVALID_STATION)
1863                         IWL_DEBUG_TX_REPLY(priv, "Station not known\n");
1864
1865                 if (priv->mac80211_registered &&
1866                     (iwl_legacy_queue_space(&txq->q) > txq->q.low_mark))
1867                         iwl_legacy_wake_queue(priv, txq);
1868         }
1869         if (qc && likely(sta_id != IWL_INVALID_STATION))
1870                 iwl4965_txq_check_empty(priv, sta_id, tid, txq_id);
1871
1872         iwl4965_check_abort_status(priv, tx_resp->frame_count, status);
1873
1874         spin_unlock_irqrestore(&priv->sta_lock, flags);
1875 }
1876
1877 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
1878                                     struct iwl_rx_mem_buffer *rxb)
1879 {
1880         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1881         struct iwl4965_beacon_notif *beacon = (void *)pkt->u.raw;
1882         u8 rate __maybe_unused =
1883                 iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
1884
1885         IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
1886                 "tsf:0x%.8x%.8x rate:%d\n",
1887                 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
1888                 beacon->beacon_notify_hdr.failure_frame,
1889                 le32_to_cpu(beacon->ibss_mgr_status),
1890                 le32_to_cpu(beacon->high_tsf),
1891                 le32_to_cpu(beacon->low_tsf), rate);
1892
1893         priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
1894 }
1895
1896 /* Set up 4965-specific Rx frame reply handlers */
1897 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
1898 {
1899         /* Legacy Rx frames */
1900         priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
1901         /* Tx response */
1902         priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
1903         priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
1904 }
1905
1906 static struct iwl_hcmd_ops iwl4965_hcmd = {
1907         .rxon_assoc = iwl4965_send_rxon_assoc,
1908         .commit_rxon = iwl4965_commit_rxon,
1909         .set_rxon_chain = iwl4965_set_rxon_chain,
1910 };
1911
1912 static void iwl4965_post_scan(struct iwl_priv *priv)
1913 {
1914         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1915
1916         /*
1917          * Since setting the RXON may have been deferred while
1918          * performing the scan, fire one off if needed
1919          */
1920         if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1921                 iwl_legacy_commit_rxon(priv, ctx);
1922 }
1923
1924 static void iwl4965_post_associate(struct iwl_priv *priv)
1925 {
1926         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1927         struct ieee80211_vif *vif = ctx->vif;
1928         struct ieee80211_conf *conf = NULL;
1929         int ret = 0;
1930
1931         if (!vif || !priv->is_open)
1932                 return;
1933
1934         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1935                 return;
1936
1937         iwl_legacy_scan_cancel_timeout(priv, 200);
1938
1939         conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
1940
1941         ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1942         iwl_legacy_commit_rxon(priv, ctx);
1943
1944         ret = iwl_legacy_send_rxon_timing(priv, ctx);
1945         if (ret)
1946                 IWL_WARN(priv, "RXON timing - "
1947                             "Attempting to continue.\n");
1948
1949         ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1950
1951         iwl_legacy_set_rxon_ht(priv, &priv->current_ht_config);
1952
1953         if (priv->cfg->ops->hcmd->set_rxon_chain)
1954                 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1955
1956         ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1957
1958         IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
1959                         vif->bss_conf.aid, vif->bss_conf.beacon_int);
1960
1961         if (vif->bss_conf.use_short_preamble)
1962                 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1963         else
1964                 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1965
1966         if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
1967                 if (vif->bss_conf.use_short_slot)
1968                         ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1969                 else
1970                         ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1971         }
1972
1973         iwl_legacy_commit_rxon(priv, ctx);
1974
1975         IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1976                         vif->bss_conf.aid, ctx->active.bssid_addr);
1977
1978         switch (vif->type) {
1979         case NL80211_IFTYPE_STATION:
1980                 break;
1981         case NL80211_IFTYPE_ADHOC:
1982                 iwl4965_send_beacon_cmd(priv);
1983                 break;
1984         default:
1985                 IWL_ERR(priv, "%s Should not be called in %d mode\n",
1986                           __func__, vif->type);
1987                 break;
1988         }
1989
1990         /* the chain noise calibration will enabled PM upon completion
1991          * If chain noise has already been run, then we need to enable
1992          * power management here */
1993         if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1994                 iwl_legacy_power_update_mode(priv, false);
1995
1996         /* Enable Rx differential gain and sensitivity calibrations */
1997         iwl4965_chain_noise_reset(priv);
1998         priv->start_calib = 1;
1999 }
2000
2001 static void iwl4965_config_ap(struct iwl_priv *priv)
2002 {
2003         struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2004         struct ieee80211_vif *vif = ctx->vif;
2005         int ret = 0;
2006
2007         lockdep_assert_held(&priv->mutex);
2008
2009         if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2010                 return;
2011
2012         /* The following should be done only at AP bring up */
2013         if (!iwl_legacy_is_associated_ctx(ctx)) {
2014
2015                 /* RXON - unassoc (to set timing command) */
2016                 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2017                 iwl_legacy_commit_rxon(priv, ctx);
2018
2019                 /* RXON Timing */
2020                 ret = iwl_legacy_send_rxon_timing(priv, ctx);
2021                 if (ret)
2022                         IWL_WARN(priv, "RXON timing failed - "
2023                                         "Attempting to continue.\n");
2024
2025                 /* AP has all antennas */
2026                 priv->chain_noise_data.active_chains =
2027                         priv->hw_params.valid_rx_ant;
2028                 iwl_legacy_set_rxon_ht(priv, &priv->current_ht_config);
2029                 if (priv->cfg->ops->hcmd->set_rxon_chain)
2030                         priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2031
2032                 ctx->staging.assoc_id = 0;
2033
2034                 if (vif->bss_conf.use_short_preamble)
2035                         ctx->staging.flags |=
2036                                 RXON_FLG_SHORT_PREAMBLE_MSK;
2037                 else
2038                         ctx->staging.flags &=
2039                                 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2040
2041                 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
2042                         if (vif->bss_conf.use_short_slot)
2043                                 ctx->staging.flags |=
2044                                         RXON_FLG_SHORT_SLOT_MSK;
2045                         else
2046                                 ctx->staging.flags &=
2047                                         ~RXON_FLG_SHORT_SLOT_MSK;
2048                 }
2049                 /* need to send beacon cmd before committing assoc RXON! */
2050                 iwl4965_send_beacon_cmd(priv);
2051                 /* restore RXON assoc */
2052                 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2053                 iwl_legacy_commit_rxon(priv, ctx);
2054         }
2055         iwl4965_send_beacon_cmd(priv);
2056 }
2057
2058 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
2059         .get_hcmd_size = iwl4965_get_hcmd_size,
2060         .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
2061         .request_scan = iwl4965_request_scan,
2062         .post_scan = iwl4965_post_scan,
2063 };
2064
2065 static struct iwl_lib_ops iwl4965_lib = {
2066         .set_hw_params = iwl4965_hw_set_hw_params,
2067         .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
2068         .txq_attach_buf_to_tfd = iwl4965_hw_txq_attach_buf_to_tfd,
2069         .txq_free_tfd = iwl4965_hw_txq_free_tfd,
2070         .txq_init = iwl4965_hw_tx_queue_init,
2071         .rx_handler_setup = iwl4965_rx_handler_setup,
2072         .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
2073         .init_alive_start = iwl4965_init_alive_start,
2074         .load_ucode = iwl4965_load_bsm,
2075         .dump_nic_event_log = iwl4965_dump_nic_event_log,
2076         .dump_nic_error_log = iwl4965_dump_nic_error_log,
2077         .dump_fh = iwl4965_dump_fh,
2078         .set_channel_switch = iwl4965_hw_channel_switch,
2079         .apm_ops = {
2080                 .init = iwl_legacy_apm_init,
2081                 .config = iwl4965_nic_config,
2082         },
2083         .eeprom_ops = {
2084                 .regulatory_bands = {
2085                         EEPROM_REGULATORY_BAND_1_CHANNELS,
2086                         EEPROM_REGULATORY_BAND_2_CHANNELS,
2087                         EEPROM_REGULATORY_BAND_3_CHANNELS,
2088                         EEPROM_REGULATORY_BAND_4_CHANNELS,
2089                         EEPROM_REGULATORY_BAND_5_CHANNELS,
2090                         EEPROM_4965_REGULATORY_BAND_24_HT40_CHANNELS,
2091                         EEPROM_4965_REGULATORY_BAND_52_HT40_CHANNELS
2092                 },
2093                 .acquire_semaphore = iwl4965_eeprom_acquire_semaphore,
2094                 .release_semaphore = iwl4965_eeprom_release_semaphore,
2095         },
2096         .send_tx_power  = iwl4965_send_tx_power,
2097         .update_chain_flags = iwl4965_update_chain_flags,
2098         .temp_ops = {
2099                 .temperature = iwl4965_temperature_calib,
2100         },
2101         .debugfs_ops = {
2102                 .rx_stats_read = iwl4965_ucode_rx_stats_read,
2103                 .tx_stats_read = iwl4965_ucode_tx_stats_read,
2104                 .general_stats_read = iwl4965_ucode_general_stats_read,
2105         },
2106         .check_plcp_health = iwl4965_good_plcp_health,
2107 };
2108
2109 static const struct iwl_legacy_ops iwl4965_legacy_ops = {
2110         .post_associate = iwl4965_post_associate,
2111         .config_ap = iwl4965_config_ap,
2112         .manage_ibss_station = iwl4965_manage_ibss_station,
2113         .update_bcast_stations = iwl4965_update_bcast_stations,
2114 };
2115
2116 struct ieee80211_ops iwl4965_hw_ops = {
2117         .tx = iwl4965_mac_tx,
2118         .start = iwl4965_mac_start,
2119         .stop = iwl4965_mac_stop,
2120         .add_interface = iwl_legacy_mac_add_interface,
2121         .remove_interface = iwl_legacy_mac_remove_interface,
2122         .change_interface = iwl_legacy_mac_change_interface,
2123         .config = iwl_legacy_mac_config,
2124         .configure_filter = iwl4965_configure_filter,
2125         .set_key = iwl4965_mac_set_key,
2126         .update_tkip_key = iwl4965_mac_update_tkip_key,
2127         .conf_tx = iwl_legacy_mac_conf_tx,
2128         .reset_tsf = iwl_legacy_mac_reset_tsf,
2129         .bss_info_changed = iwl_legacy_mac_bss_info_changed,
2130         .ampdu_action = iwl4965_mac_ampdu_action,
2131         .hw_scan = iwl_legacy_mac_hw_scan,
2132         .sta_add = iwl4965_mac_sta_add,
2133         .sta_remove = iwl_legacy_mac_sta_remove,
2134         .channel_switch = iwl4965_mac_channel_switch,
2135         .tx_last_beacon = iwl_legacy_mac_tx_last_beacon,
2136 };
2137
2138 static const struct iwl_ops iwl4965_ops = {
2139         .lib = &iwl4965_lib,
2140         .hcmd = &iwl4965_hcmd,
2141         .utils = &iwl4965_hcmd_utils,
2142         .led = &iwl4965_led_ops,
2143         .legacy = &iwl4965_legacy_ops,
2144         .ieee80211_ops = &iwl4965_hw_ops,
2145 };
2146
2147 static struct iwl_base_params iwl4965_base_params = {
2148         .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
2149         .num_of_queues = IWL49_NUM_QUEUES,
2150         .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
2151         .pll_cfg_val = 0,
2152         .set_l0s = true,
2153         .use_bsm = true,
2154         .led_compensation = 61,
2155         .chain_noise_num_beacons = IWL4965_CAL_NUM_BEACONS,
2156         .plcp_delta_threshold = IWL_MAX_PLCP_ERR_THRESHOLD_DEF,
2157         .wd_timeout = IWL_DEF_WD_TIMEOUT,
2158         .temperature_kelvin = true,
2159         .max_event_log_size = 512,
2160         .ucode_tracing = true,
2161         .sensitivity_calib_by_driver = true,
2162         .chain_noise_calib_by_driver = true,
2163 };
2164
2165 struct iwl_cfg iwl4965_cfg = {
2166         .name = "Intel(R) Wireless WiFi Link 4965AGN",
2167         .fw_name_pre = IWL4965_FW_PRE,
2168         .ucode_api_max = IWL4965_UCODE_API_MAX,
2169         .ucode_api_min = IWL4965_UCODE_API_MIN,
2170         .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
2171         .valid_tx_ant = ANT_AB,
2172         .valid_rx_ant = ANT_ABC,
2173         .eeprom_ver = EEPROM_4965_EEPROM_VERSION,
2174         .eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
2175         .ops = &iwl4965_ops,
2176         .mod_params = &iwl4965_mod_params,
2177         .base_params = &iwl4965_base_params,
2178         .led_mode = IWL_LED_BLINK,
2179         /*
2180          * Force use of chains B and C for scan RX on 5 GHz band
2181          * because the device has off-channel reception on chain A.
2182          */
2183         .scan_rx_antennas[IEEE80211_BAND_5GHZ] = ANT_BC,
2184 };
2185
2186 /* Module firmware */
2187 MODULE_FIRMWARE(IWL4965_MODULE_FIRMWARE(IWL4965_UCODE_API_MAX));