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Revert "Merge branch 'ath6kl-next' of master.kernel.org:/pub/scm/linux/kernel/git...
[linux-2.6/next.git] / drivers / net / wireless / iwlegacy / iwl-4965.c
blob86f4fce193e41ea9673bd9517faf491c387d8e3a
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 <net/mac80211.h>
37 #include <linux/etherdevice.h>
38 #include <asm/unaligned.h>
39
40 #include "iwl-eeprom.h"
41 #include "iwl-dev.h"
42 #include "iwl-core.h"
43 #include "iwl-io.h"
44 #include "iwl-helpers.h"
45 #include "iwl-4965-calib.h"
46 #include "iwl-sta.h"
47 #include "iwl-4965-led.h"
48 #include "iwl-4965.h"
49 #include "iwl-4965-debugfs.h"
50
51 static int iwl4965_send_tx_power(struct iwl_priv *priv);
52 static int iwl4965_hw_get_temperature(struct iwl_priv *priv);
53
54 /* Highest firmware API version supported */
55 #define IWL4965_UCODE_API_MAX 2
56
57 /* Lowest firmware API version supported */
58 #define IWL4965_UCODE_API_MIN 2
59
60 #define IWL4965_FW_PRE "iwlwifi-4965-"
61 #define _IWL4965_MODULE_FIRMWARE(api) IWL4965_FW_PRE #api ".ucode"
62 #define IWL4965_MODULE_FIRMWARE(api) _IWL4965_MODULE_FIRMWARE(api)
63
64 /* check contents of special bootstrap uCode SRAM */
65 static int iwl4965_verify_bsm(struct iwl_priv *priv)
66 {
67 __le32 *image = priv->ucode_boot.v_addr;
68 u32 len = priv->ucode_boot.len;
69 u32 reg;
70 u32 val;
71
72 IWL_DEBUG_INFO(priv, "Begin verify bsm\n");
73
74 /* verify BSM SRAM contents */
75 val = iwl_legacy_read_prph(priv, BSM_WR_DWCOUNT_REG);
76 for (reg = BSM_SRAM_LOWER_BOUND;
77 reg < BSM_SRAM_LOWER_BOUND + len;
78 reg += sizeof(u32), image++) {
79 val = iwl_legacy_read_prph(priv, reg);
80 if (val != le32_to_cpu(*image)) {
81 IWL_ERR(priv, "BSM uCode verification failed at "
82 "addr 0x%08X+%u (of %u), is 0x%x, s/b 0x%x\n",
83 BSM_SRAM_LOWER_BOUND,
84 reg - BSM_SRAM_LOWER_BOUND, len,
85 val, le32_to_cpu(*image));
86 return -EIO;
87 }
88 }
89
90 IWL_DEBUG_INFO(priv, "BSM bootstrap uCode image OK\n");
91
92 return 0;
93 }
94
95 /**
96 * iwl4965_load_bsm - Load bootstrap instructions
97 *
98 * BSM operation:
99 *
100 * The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
101 * in special SRAM that does not power down during RFKILL. When powering back
102 * up after power-saving sleeps (or during initial uCode load), the BSM loads
103 * the bootstrap program into the on-board processor, and starts it.
104 *
105 * The bootstrap program loads (via DMA) instructions and data for a new
106 * program from host DRAM locations indicated by the host driver in the
107 * BSM_DRAM_* registers. Once the new program is loaded, it starts
108 * automatically.
109 *
110 * When initializing the NIC, the host driver points the BSM to the
111 * "initialize" uCode image. This uCode sets up some internal data, then
112 * notifies host via "initialize alive" that it is complete.
113 *
114 * The host then replaces the BSM_DRAM_* pointer values to point to the
115 * normal runtime uCode instructions and a backup uCode data cache buffer
116 * (filled initially with starting data values for the on-board processor),
117 * then triggers the "initialize" uCode to load and launch the runtime uCode,
118 * which begins normal operation.
119 *
120 * When doing a power-save shutdown, runtime uCode saves data SRAM into
121 * the backup data cache in DRAM before SRAM is powered down.
122 *
123 * When powering back up, the BSM loads the bootstrap program. This reloads
124 * the runtime uCode instructions and the backup data cache into SRAM,
125 * and re-launches the runtime uCode from where it left off.
126 */
127 static int iwl4965_load_bsm(struct iwl_priv *priv)
128 {
129 __le32 *image = priv->ucode_boot.v_addr;
130 u32 len = priv->ucode_boot.len;
131 dma_addr_t pinst;
132 dma_addr_t pdata;
133 u32 inst_len;
134 u32 data_len;
135 int i;
136 u32 done;
137 u32 reg_offset;
138 int ret;
139
140 IWL_DEBUG_INFO(priv, "Begin load bsm\n");
141
142 priv->ucode_type = UCODE_RT;
143
144 /* make sure bootstrap program is no larger than BSM's SRAM size */
145 if (len > IWL49_MAX_BSM_SIZE)
146 return -EINVAL;
147
148 /* Tell bootstrap uCode where to find the "Initialize" uCode
149 * in host DRAM ... host DRAM physical address bits 35:4 for 4965.
150 * NOTE: iwl_init_alive_start() will replace these values,
151 * after the "initialize" uCode has run, to point to
152 * runtime/protocol instructions and backup data cache.
153 */
154 pinst = priv->ucode_init.p_addr >> 4;
155 pdata = priv->ucode_init_data.p_addr >> 4;
156 inst_len = priv->ucode_init.len;
157 data_len = priv->ucode_init_data.len;
158
159 iwl_legacy_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
160 iwl_legacy_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
161 iwl_legacy_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG, inst_len);
162 iwl_legacy_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG, data_len);
163
164 /* Fill BSM memory with bootstrap instructions */
165 for (reg_offset = BSM_SRAM_LOWER_BOUND;
166 reg_offset < BSM_SRAM_LOWER_BOUND + len;
167 reg_offset += sizeof(u32), image++)
168 _iwl_legacy_write_prph(priv, reg_offset, le32_to_cpu(*image));
169
170 ret = iwl4965_verify_bsm(priv);
171 if (ret)
172 return ret;
173
174 /* Tell BSM to copy from BSM SRAM into instruction SRAM, when asked */
175 iwl_legacy_write_prph(priv, BSM_WR_MEM_SRC_REG, 0x0);
176 iwl_legacy_write_prph(priv,
177 BSM_WR_MEM_DST_REG, IWL49_RTC_INST_LOWER_BOUND);
178 iwl_legacy_write_prph(priv, BSM_WR_DWCOUNT_REG, len / sizeof(u32));
179
180 /* Load bootstrap code into instruction SRAM now,
181 * to prepare to load "initialize" uCode */
182 iwl_legacy_write_prph(priv, BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START);
183
184 /* Wait for load of bootstrap uCode to finish */
185 for (i = 0; i < 100; i++) {
186 done = iwl_legacy_read_prph(priv, BSM_WR_CTRL_REG);
187 if (!(done & BSM_WR_CTRL_REG_BIT_START))
188 break;
189 udelay(10);
190 }
191 if (i < 100)
192 IWL_DEBUG_INFO(priv, "BSM write complete, poll %d iterations\n", i);
193 else {
194 IWL_ERR(priv, "BSM write did not complete!\n");
195 return -EIO;
196 }
197
198 /* Enable future boot loads whenever power management unit triggers it
199 * (e.g. when powering back up after power-save shutdown) */
200 iwl_legacy_write_prph(priv,
201 BSM_WR_CTRL_REG, BSM_WR_CTRL_REG_BIT_START_EN);
202
203
204 return 0;
205 }
206
207 /**
208 * iwl4965_set_ucode_ptrs - Set uCode address location
209 *
210 * Tell initialization uCode where to find runtime uCode.
211 *
212 * BSM registers initially contain pointers to initialization uCode.
213 * We need to replace them to load runtime uCode inst and data,
214 * and to save runtime data when powering down.
215 */
216 static int iwl4965_set_ucode_ptrs(struct iwl_priv *priv)
217 {
218 dma_addr_t pinst;
219 dma_addr_t pdata;
220 int ret = 0;
221
222 /* bits 35:4 for 4965 */
223 pinst = priv->ucode_code.p_addr >> 4;
224 pdata = priv->ucode_data_backup.p_addr >> 4;
225
226 /* Tell bootstrap uCode where to find image to load */
227 iwl_legacy_write_prph(priv, BSM_DRAM_INST_PTR_REG, pinst);
228 iwl_legacy_write_prph(priv, BSM_DRAM_DATA_PTR_REG, pdata);
229 iwl_legacy_write_prph(priv, BSM_DRAM_DATA_BYTECOUNT_REG,
230 priv->ucode_data.len);
231
232 /* Inst byte count must be last to set up, bit 31 signals uCode
233 * that all new ptr/size info is in place */
234 iwl_legacy_write_prph(priv, BSM_DRAM_INST_BYTECOUNT_REG,
235 priv->ucode_code.len | BSM_DRAM_INST_LOAD);
236 IWL_DEBUG_INFO(priv, "Runtime uCode pointers are set.\n");
237
238 return ret;
239 }
240
241 /**
242 * iwl4965_init_alive_start - Called after REPLY_ALIVE notification received
243 *
244 * Called after REPLY_ALIVE notification received from "initialize" uCode.
245 *
246 * The 4965 "initialize" ALIVE reply contains calibration data for:
247 * Voltage, temperature, and MIMO tx gain correction, now stored in priv
248 * (3945 does not contain this data).
249 *
250 * Tell "initialize" uCode to go ahead and load the runtime uCode.
251 */
252 static void iwl4965_init_alive_start(struct iwl_priv *priv)
253 {
254 /* Bootstrap uCode has loaded initialize uCode ... verify inst image.
255 * This is a paranoid check, because we would not have gotten the
256 * "initialize" alive if code weren't properly loaded. */
257 if (iwl4965_verify_ucode(priv)) {
258 /* Runtime instruction load was bad;
259 * take it all the way back down so we can try again */
260 IWL_DEBUG_INFO(priv, "Bad \"initialize\" uCode load.\n");
261 goto restart;
262 }
263
264 /* Calculate temperature */
265 priv->temperature = iwl4965_hw_get_temperature(priv);
266
267 /* Send pointers to protocol/runtime uCode image ... init code will
268 * load and launch runtime uCode, which will send us another "Alive"
269 * notification. */
270 IWL_DEBUG_INFO(priv, "Initialization Alive received.\n");
271 if (iwl4965_set_ucode_ptrs(priv)) {
272 /* Runtime instruction load won't happen;
273 * take it all the way back down so we can try again */
274 IWL_DEBUG_INFO(priv, "Couldn't set up uCode pointers.\n");
275 goto restart;
276 }
277 return;
278
279 restart:
280 queue_work(priv->workqueue, &priv->restart);
281 }
282
283 static bool iw4965_is_ht40_channel(__le32 rxon_flags)
284 {
285 int chan_mod = le32_to_cpu(rxon_flags & RXON_FLG_CHANNEL_MODE_MSK)
286 >> RXON_FLG_CHANNEL_MODE_POS;
287 return ((chan_mod == CHANNEL_MODE_PURE_40) ||
288 (chan_mod == CHANNEL_MODE_MIXED));
289 }
290
291 static void iwl4965_nic_config(struct iwl_priv *priv)
292 {
293 unsigned long flags;
294 u16 radio_cfg;
295
296 spin_lock_irqsave(&priv->lock, flags);
297
298 radio_cfg = iwl_legacy_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
299
300 /* write radio config values to register */
301 if (EEPROM_RF_CFG_TYPE_MSK(radio_cfg) == EEPROM_4965_RF_CFG_TYPE_MAX)
302 iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
303 EEPROM_RF_CFG_TYPE_MSK(radio_cfg) |
304 EEPROM_RF_CFG_STEP_MSK(radio_cfg) |
305 EEPROM_RF_CFG_DASH_MSK(radio_cfg));
306
307 /* set CSR_HW_CONFIG_REG for uCode use */
308 iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
309 CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI |
310 CSR_HW_IF_CONFIG_REG_BIT_MAC_SI);
311
312 priv->calib_info = (struct iwl_eeprom_calib_info *)
313 iwl_legacy_eeprom_query_addr(priv,
314 EEPROM_4965_CALIB_TXPOWER_OFFSET);
315
316 spin_unlock_irqrestore(&priv->lock, flags);
317 }
318
319 /* Reset differential Rx gains in NIC to prepare for chain noise calibration.
320 * Called after every association, but this runs only once!
321 * ... once chain noise is calibrated the first time, it's good forever. */
322 static void iwl4965_chain_noise_reset(struct iwl_priv *priv)
323 {
324 struct iwl_chain_noise_data *data = &(priv->chain_noise_data);
325
326 if ((data->state == IWL_CHAIN_NOISE_ALIVE) &&
327 iwl_legacy_is_any_associated(priv)) {
328 struct iwl_calib_diff_gain_cmd cmd;
329
330 /* clear data for chain noise calibration algorithm */
331 data->chain_noise_a = 0;
332 data->chain_noise_b = 0;
333 data->chain_noise_c = 0;
334 data->chain_signal_a = 0;
335 data->chain_signal_b = 0;
336 data->chain_signal_c = 0;
337 data->beacon_count = 0;
338
339 memset(&cmd, 0, sizeof(cmd));
340 cmd.hdr.op_code = IWL_PHY_CALIBRATE_DIFF_GAIN_CMD;
341 cmd.diff_gain_a = 0;
342 cmd.diff_gain_b = 0;
343 cmd.diff_gain_c = 0;
344 if (iwl_legacy_send_cmd_pdu(priv, REPLY_PHY_CALIBRATION_CMD,
345 sizeof(cmd), &cmd))
346 IWL_ERR(priv,
347 "Could not send REPLY_PHY_CALIBRATION_CMD\n");
348 data->state = IWL_CHAIN_NOISE_ACCUMULATE;
349 IWL_DEBUG_CALIB(priv, "Run chain_noise_calibrate\n");
350 }
351 }
352
353 static struct iwl_sensitivity_ranges iwl4965_sensitivity = {
354 .min_nrg_cck = 97,
355 .max_nrg_cck = 0, /* not used, set to 0 */
356
357 .auto_corr_min_ofdm = 85,
358 .auto_corr_min_ofdm_mrc = 170,
359 .auto_corr_min_ofdm_x1 = 105,
360 .auto_corr_min_ofdm_mrc_x1 = 220,
361
362 .auto_corr_max_ofdm = 120,
363 .auto_corr_max_ofdm_mrc = 210,
364 .auto_corr_max_ofdm_x1 = 140,
365 .auto_corr_max_ofdm_mrc_x1 = 270,
366
367 .auto_corr_min_cck = 125,
368 .auto_corr_max_cck = 200,
369 .auto_corr_min_cck_mrc = 200,
370 .auto_corr_max_cck_mrc = 400,
371
372 .nrg_th_cck = 100,
373 .nrg_th_ofdm = 100,
374
375 .barker_corr_th_min = 190,
376 .barker_corr_th_min_mrc = 390,
377 .nrg_th_cca = 62,
378 };
379
380 static void iwl4965_set_ct_threshold(struct iwl_priv *priv)
381 {
382 /* want Kelvin */
383 priv->hw_params.ct_kill_threshold =
384 CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY);
385 }
386
387 /**
388 * iwl4965_hw_set_hw_params
389 *
390 * Called when initializing driver
391 */
392 static int iwl4965_hw_set_hw_params(struct iwl_priv *priv)
393 {
394 if (priv->cfg->mod_params->num_of_queues >= IWL_MIN_NUM_QUEUES &&
395 priv->cfg->mod_params->num_of_queues <= IWL49_NUM_QUEUES)
396 priv->cfg->base_params->num_of_queues =
397 priv->cfg->mod_params->num_of_queues;
398
399 priv->hw_params.max_txq_num = priv->cfg->base_params->num_of_queues;
400 priv->hw_params.dma_chnl_num = FH49_TCSR_CHNL_NUM;
401 priv->hw_params.scd_bc_tbls_size =
402 priv->cfg->base_params->num_of_queues *
403 sizeof(struct iwl4965_scd_bc_tbl);
404 priv->hw_params.tfd_size = sizeof(struct iwl_tfd);
405 priv->hw_params.max_stations = IWL4965_STATION_COUNT;
406 priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWL4965_BROADCAST_ID;
407 priv->hw_params.max_data_size = IWL49_RTC_DATA_SIZE;
408 priv->hw_params.max_inst_size = IWL49_RTC_INST_SIZE;
409 priv->hw_params.max_bsm_size = BSM_SRAM_SIZE;
410 priv->hw_params.ht40_channel = BIT(IEEE80211_BAND_5GHZ);
411
412 priv->hw_params.rx_wrt_ptr_reg = FH_RSCSR_CHNL0_WPTR;
413
414 priv->hw_params.tx_chains_num = iwl4965_num_of_ant(priv->cfg->valid_tx_ant);
415 priv->hw_params.rx_chains_num = iwl4965_num_of_ant(priv->cfg->valid_rx_ant);
416 priv->hw_params.valid_tx_ant = priv->cfg->valid_tx_ant;
417 priv->hw_params.valid_rx_ant = priv->cfg->valid_rx_ant;
418
419 iwl4965_set_ct_threshold(priv);
420
421 priv->hw_params.sens = &iwl4965_sensitivity;
422 priv->hw_params.beacon_time_tsf_bits = IWL4965_EXT_BEACON_TIME_POS;
423
424 return 0;
425 }
426
427 static s32 iwl4965_math_div_round(s32 num, s32 denom, s32 *res)
428 {
429 s32 sign = 1;
430
431 if (num < 0) {
432 sign = -sign;
433 num = -num;
434 }
435 if (denom < 0) {
436 sign = -sign;
437 denom = -denom;
438 }
439 *res = 1;
440 *res = ((num * 2 + denom) / (denom * 2)) * sign;
441
442 return 1;
443 }
444
445 /**
446 * iwl4965_get_voltage_compensation - Power supply voltage comp for txpower
447 *
448 * Determines power supply voltage compensation for txpower calculations.
449 * Returns number of 1/2-dB steps to subtract from gain table index,
450 * to compensate for difference between power supply voltage during
451 * factory measurements, vs. current power supply voltage.
452 *
453 * Voltage indication is higher for lower voltage.
454 * Lower voltage requires more gain (lower gain table index).
455 */
456 static s32 iwl4965_get_voltage_compensation(s32 eeprom_voltage,
457 s32 current_voltage)
458 {
459 s32 comp = 0;
460
461 if ((TX_POWER_IWL_ILLEGAL_VOLTAGE == eeprom_voltage) ||
462 (TX_POWER_IWL_ILLEGAL_VOLTAGE == current_voltage))
463 return 0;
464
465 iwl4965_math_div_round(current_voltage - eeprom_voltage,
466 TX_POWER_IWL_VOLTAGE_CODES_PER_03V, &comp);
467
468 if (current_voltage > eeprom_voltage)
469 comp *= 2;
470 if ((comp < -2) || (comp > 2))
471 comp = 0;
472
473 return comp;
474 }
475
476 static s32 iwl4965_get_tx_atten_grp(u16 channel)
477 {
478 if (channel >= CALIB_IWL_TX_ATTEN_GR5_FCH &&
479 channel <= CALIB_IWL_TX_ATTEN_GR5_LCH)
480 return CALIB_CH_GROUP_5;
481
482 if (channel >= CALIB_IWL_TX_ATTEN_GR1_FCH &&
483 channel <= CALIB_IWL_TX_ATTEN_GR1_LCH)
484 return CALIB_CH_GROUP_1;
485
486 if (channel >= CALIB_IWL_TX_ATTEN_GR2_FCH &&
487 channel <= CALIB_IWL_TX_ATTEN_GR2_LCH)
488 return CALIB_CH_GROUP_2;
489
490 if (channel >= CALIB_IWL_TX_ATTEN_GR3_FCH &&
491 channel <= CALIB_IWL_TX_ATTEN_GR3_LCH)
492 return CALIB_CH_GROUP_3;
493
494 if (channel >= CALIB_IWL_TX_ATTEN_GR4_FCH &&
495 channel <= CALIB_IWL_TX_ATTEN_GR4_LCH)
496 return CALIB_CH_GROUP_4;
497
498 return -EINVAL;
499 }
500
501 static u32 iwl4965_get_sub_band(const struct iwl_priv *priv, u32 channel)
502 {
503 s32 b = -1;
504
505 for (b = 0; b < EEPROM_TX_POWER_BANDS; b++) {
506 if (priv->calib_info->band_info[b].ch_from == 0)
507 continue;
508
509 if ((channel >= priv->calib_info->band_info[b].ch_from)
510 && (channel <= priv->calib_info->band_info[b].ch_to))
511 break;
512 }
513
514 return b;
515 }
516
517 static s32 iwl4965_interpolate_value(s32 x, s32 x1, s32 y1, s32 x2, s32 y2)
518 {
519 s32 val;
520
521 if (x2 == x1)
522 return y1;
523 else {
524 iwl4965_math_div_round((x2 - x) * (y1 - y2), (x2 - x1), &val);
525 return val + y2;
526 }
527 }
528
529 /**
530 * iwl4965_interpolate_chan - Interpolate factory measurements for one channel
531 *
532 * Interpolates factory measurements from the two sample channels within a
533 * sub-band, to apply to channel of interest. Interpolation is proportional to
534 * differences in channel frequencies, which is proportional to differences
535 * in channel number.
536 */
537 static int iwl4965_interpolate_chan(struct iwl_priv *priv, u32 channel,
538 struct iwl_eeprom_calib_ch_info *chan_info)
539 {
540 s32 s = -1;
541 u32 c;
542 u32 m;
543 const struct iwl_eeprom_calib_measure *m1;
544 const struct iwl_eeprom_calib_measure *m2;
545 struct iwl_eeprom_calib_measure *omeas;
546 u32 ch_i1;
547 u32 ch_i2;
548
549 s = iwl4965_get_sub_band(priv, channel);
550 if (s >= EEPROM_TX_POWER_BANDS) {
551 IWL_ERR(priv, "Tx Power can not find channel %d\n", channel);
552 return -1;
553 }
554
555 ch_i1 = priv->calib_info->band_info[s].ch1.ch_num;
556 ch_i2 = priv->calib_info->band_info[s].ch2.ch_num;
557 chan_info->ch_num = (u8) channel;
558
559 IWL_DEBUG_TXPOWER(priv, "channel %d subband %d factory cal ch %d & %d\n",
560 channel, s, ch_i1, ch_i2);
561
562 for (c = 0; c < EEPROM_TX_POWER_TX_CHAINS; c++) {
563 for (m = 0; m < EEPROM_TX_POWER_MEASUREMENTS; m++) {
564 m1 = &(priv->calib_info->band_info[s].ch1.
565 measurements[c][m]);
566 m2 = &(priv->calib_info->band_info[s].ch2.
567 measurements[c][m]);
568 omeas = &(chan_info->measurements[c][m]);
569
570 omeas->actual_pow =
571 (u8) iwl4965_interpolate_value(channel, ch_i1,
572 m1->actual_pow,
573 ch_i2,
574 m2->actual_pow);
575 omeas->gain_idx =
576 (u8) iwl4965_interpolate_value(channel, ch_i1,
577 m1->gain_idx, ch_i2,
578 m2->gain_idx);
579 omeas->temperature =
580 (u8) iwl4965_interpolate_value(channel, ch_i1,
581 m1->temperature,
582 ch_i2,
583 m2->temperature);
584 omeas->pa_det =
585 (s8) iwl4965_interpolate_value(channel, ch_i1,
586 m1->pa_det, ch_i2,
587 m2->pa_det);
588
589 IWL_DEBUG_TXPOWER(priv,
590 "chain %d meas %d AP1=%d AP2=%d AP=%d\n", c, m,
591 m1->actual_pow, m2->actual_pow, omeas->actual_pow);
592 IWL_DEBUG_TXPOWER(priv,
593 "chain %d meas %d NI1=%d NI2=%d NI=%d\n", c, m,
594 m1->gain_idx, m2->gain_idx, omeas->gain_idx);
595 IWL_DEBUG_TXPOWER(priv,
596 "chain %d meas %d PA1=%d PA2=%d PA=%d\n", c, m,
597 m1->pa_det, m2->pa_det, omeas->pa_det);
598 IWL_DEBUG_TXPOWER(priv,
599 "chain %d meas %d T1=%d T2=%d T=%d\n", c, m,
600 m1->temperature, m2->temperature,
601 omeas->temperature);
602 }
603 }
604
605 return 0;
606 }
607
608 /* bit-rate-dependent table to prevent Tx distortion, in half-dB units,
609 * for OFDM 6, 12, 18, 24, 36, 48, 54, 60 MBit, and CCK all rates. */
610 static s32 back_off_table[] = {
611 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 20 MHz */
612 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 20 MHz */
613 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM SISO 40 MHz */
614 10, 10, 10, 10, 10, 15, 17, 20, /* OFDM MIMO 40 MHz */
615 10 /* CCK */
616 };
617
618 /* Thermal compensation values for txpower for various frequency ranges ...
619 * ratios from 3:1 to 4.5:1 of degrees (Celsius) per half-dB gain adjust */
620 static struct iwl4965_txpower_comp_entry {
621 s32 degrees_per_05db_a;
622 s32 degrees_per_05db_a_denom;
623 } tx_power_cmp_tble[CALIB_CH_GROUP_MAX] = {
624 {9, 2}, /* group 0 5.2, ch 34-43 */
625 {4, 1}, /* group 1 5.2, ch 44-70 */
626 {4, 1}, /* group 2 5.2, ch 71-124 */
627 {4, 1}, /* group 3 5.2, ch 125-200 */
628 {3, 1} /* group 4 2.4, ch all */
629 };
630
631 static s32 get_min_power_index(s32 rate_power_index, u32 band)
632 {
633 if (!band) {
634 if ((rate_power_index & 7) <= 4)
635 return MIN_TX_GAIN_INDEX_52GHZ_EXT;
636 }
637 return MIN_TX_GAIN_INDEX;
638 }
639
640 struct gain_entry {
641 u8 dsp;
642 u8 radio;
643 };
644
645 static const struct gain_entry gain_table[2][108] = {
646 /* 5.2GHz power gain index table */
647 {
648 {123, 0x3F}, /* highest txpower */
649 {117, 0x3F},
650 {110, 0x3F},
651 {104, 0x3F},
652 {98, 0x3F},
653 {110, 0x3E},
654 {104, 0x3E},
655 {98, 0x3E},
656 {110, 0x3D},
657 {104, 0x3D},
658 {98, 0x3D},
659 {110, 0x3C},
660 {104, 0x3C},
661 {98, 0x3C},
662 {110, 0x3B},
663 {104, 0x3B},
664 {98, 0x3B},
665 {110, 0x3A},
666 {104, 0x3A},
667 {98, 0x3A},
668 {110, 0x39},
669 {104, 0x39},
670 {98, 0x39},
671 {110, 0x38},
672 {104, 0x38},
673 {98, 0x38},
674 {110, 0x37},
675 {104, 0x37},
676 {98, 0x37},
677 {110, 0x36},
678 {104, 0x36},
679 {98, 0x36},
680 {110, 0x35},
681 {104, 0x35},
682 {98, 0x35},
683 {110, 0x34},
684 {104, 0x34},
685 {98, 0x34},
686 {110, 0x33},
687 {104, 0x33},
688 {98, 0x33},
689 {110, 0x32},
690 {104, 0x32},
691 {98, 0x32},
692 {110, 0x31},
693 {104, 0x31},
694 {98, 0x31},
695 {110, 0x30},
696 {104, 0x30},
697 {98, 0x30},
698 {110, 0x25},
699 {104, 0x25},
700 {98, 0x25},
701 {110, 0x24},
702 {104, 0x24},
703 {98, 0x24},
704 {110, 0x23},
705 {104, 0x23},
706 {98, 0x23},
707 {110, 0x22},
708 {104, 0x18},
709 {98, 0x18},
710 {110, 0x17},
711 {104, 0x17},
712 {98, 0x17},
713 {110, 0x16},
714 {104, 0x16},
715 {98, 0x16},
716 {110, 0x15},
717 {104, 0x15},
718 {98, 0x15},
719 {110, 0x14},
720 {104, 0x14},
721 {98, 0x14},
722 {110, 0x13},
723 {104, 0x13},
724 {98, 0x13},
725 {110, 0x12},
726 {104, 0x08},
727 {98, 0x08},
728 {110, 0x07},
729 {104, 0x07},
730 {98, 0x07},
731 {110, 0x06},
732 {104, 0x06},
733 {98, 0x06},
734 {110, 0x05},
735 {104, 0x05},
736 {98, 0x05},
737 {110, 0x04},
738 {104, 0x04},
739 {98, 0x04},
740 {110, 0x03},
741 {104, 0x03},
742 {98, 0x03},
743 {110, 0x02},
744 {104, 0x02},
745 {98, 0x02},
746 {110, 0x01},
747 {104, 0x01},
748 {98, 0x01},
749 {110, 0x00},
750 {104, 0x00},
751 {98, 0x00},
752 {93, 0x00},
753 {88, 0x00},
754 {83, 0x00},
755 {78, 0x00},
756 },
757 /* 2.4GHz power gain index table */
758 {
759 {110, 0x3f}, /* highest txpower */
760 {104, 0x3f},
761 {98, 0x3f},
762 {110, 0x3e},
763 {104, 0x3e},
764 {98, 0x3e},
765 {110, 0x3d},
766 {104, 0x3d},
767 {98, 0x3d},
768 {110, 0x3c},
769 {104, 0x3c},
770 {98, 0x3c},
771 {110, 0x3b},
772 {104, 0x3b},
773 {98, 0x3b},
774 {110, 0x3a},
775 {104, 0x3a},
776 {98, 0x3a},
777 {110, 0x39},
778 {104, 0x39},
779 {98, 0x39},
780 {110, 0x38},
781 {104, 0x38},
782 {98, 0x38},
783 {110, 0x37},
784 {104, 0x37},
785 {98, 0x37},
786 {110, 0x36},
787 {104, 0x36},
788 {98, 0x36},
789 {110, 0x35},
790 {104, 0x35},
791 {98, 0x35},
792 {110, 0x34},
793 {104, 0x34},
794 {98, 0x34},
795 {110, 0x33},
796 {104, 0x33},
797 {98, 0x33},
798 {110, 0x32},
799 {104, 0x32},
800 {98, 0x32},
801 {110, 0x31},
802 {104, 0x31},
803 {98, 0x31},
804 {110, 0x30},
805 {104, 0x30},
806 {98, 0x30},
807 {110, 0x6},
808 {104, 0x6},
809 {98, 0x6},
810 {110, 0x5},
811 {104, 0x5},
812 {98, 0x5},
813 {110, 0x4},
814 {104, 0x4},
815 {98, 0x4},
816 {110, 0x3},
817 {104, 0x3},
818 {98, 0x3},
819 {110, 0x2},
820 {104, 0x2},
821 {98, 0x2},
822 {110, 0x1},
823 {104, 0x1},
824 {98, 0x1},
825 {110, 0x0},
826 {104, 0x0},
827 {98, 0x0},
828 {97, 0},
829 {96, 0},
830 {95, 0},
831 {94, 0},
832 {93, 0},
833 {92, 0},
834 {91, 0},
835 {90, 0},
836 {89, 0},
837 {88, 0},
838 {87, 0},
839 {86, 0},
840 {85, 0},
841 {84, 0},
842 {83, 0},
843 {82, 0},
844 {81, 0},
845 {80, 0},
846 {79, 0},
847 {78, 0},
848 {77, 0},
849 {76, 0},
850 {75, 0},
851 {74, 0},
852 {73, 0},
853 {72, 0},
854 {71, 0},
855 {70, 0},
856 {69, 0},
857 {68, 0},
858 {67, 0},
859 {66, 0},
860 {65, 0},
861 {64, 0},
862 {63, 0},
863 {62, 0},
864 {61, 0},
865 {60, 0},
866 {59, 0},
867 }
868 };
869
870 static int iwl4965_fill_txpower_tbl(struct iwl_priv *priv, u8 band, u16 channel,
871 u8 is_ht40, u8 ctrl_chan_high,
872 struct iwl4965_tx_power_db *tx_power_tbl)
873 {
874 u8 saturation_power;
875 s32 target_power;
876 s32 user_target_power;
877 s32 power_limit;
878 s32 current_temp;
879 s32 reg_limit;
880 s32 current_regulatory;
881 s32 txatten_grp = CALIB_CH_GROUP_MAX;
882 int i;
883 int c;
884 const struct iwl_channel_info *ch_info = NULL;
885 struct iwl_eeprom_calib_ch_info ch_eeprom_info;
886 const struct iwl_eeprom_calib_measure *measurement;
887 s16 voltage;
888 s32 init_voltage;
889 s32 voltage_compensation;
890 s32 degrees_per_05db_num;
891 s32 degrees_per_05db_denom;
892 s32 factory_temp;
893 s32 temperature_comp[2];
894 s32 factory_gain_index[2];
895 s32 factory_actual_pwr[2];
896 s32 power_index;
897
898 /* tx_power_user_lmt is in dBm, convert to half-dBm (half-dB units
899 * are used for indexing into txpower table) */
900 user_target_power = 2 * priv->tx_power_user_lmt;
901
902 /* Get current (RXON) channel, band, width */
903 IWL_DEBUG_TXPOWER(priv, "chan %d band %d is_ht40 %d\n", channel, band,
904 is_ht40);
905
906 ch_info = iwl_legacy_get_channel_info(priv, priv->band, channel);
907
908 if (!iwl_legacy_is_channel_valid(ch_info))
909 return -EINVAL;
910
911 /* get txatten group, used to select 1) thermal txpower adjustment
912 * and 2) mimo txpower balance between Tx chains. */
913 txatten_grp = iwl4965_get_tx_atten_grp(channel);
914 if (txatten_grp < 0) {
915 IWL_ERR(priv, "Can't find txatten group for channel %d.\n",
916 channel);
917 return txatten_grp;
918 }
919
920 IWL_DEBUG_TXPOWER(priv, "channel %d belongs to txatten group %d\n",
921 channel, txatten_grp);
922
923 if (is_ht40) {
924 if (ctrl_chan_high)
925 channel -= 2;
926 else
927 channel += 2;
928 }
929
930 /* hardware txpower limits ...
931 * saturation (clipping distortion) txpowers are in half-dBm */
932 if (band)
933 saturation_power = priv->calib_info->saturation_power24;
934 else
935 saturation_power = priv->calib_info->saturation_power52;
936
937 if (saturation_power < IWL_TX_POWER_SATURATION_MIN ||
938 saturation_power > IWL_TX_POWER_SATURATION_MAX) {
939 if (band)
940 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_24;
941 else
942 saturation_power = IWL_TX_POWER_DEFAULT_SATURATION_52;
943 }
944
945 /* regulatory txpower limits ... reg_limit values are in half-dBm,
946 * max_power_avg values are in dBm, convert * 2 */
947 if (is_ht40)
948 reg_limit = ch_info->ht40_max_power_avg * 2;
949 else
950 reg_limit = ch_info->max_power_avg * 2;
951
952 if ((reg_limit < IWL_TX_POWER_REGULATORY_MIN) ||
953 (reg_limit > IWL_TX_POWER_REGULATORY_MAX)) {
954 if (band)
955 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_24;
956 else
957 reg_limit = IWL_TX_POWER_DEFAULT_REGULATORY_52;
958 }
959
960 /* Interpolate txpower calibration values for this channel,
961 * based on factory calibration tests on spaced channels. */
962 iwl4965_interpolate_chan(priv, channel, &ch_eeprom_info);
963
964 /* calculate tx gain adjustment based on power supply voltage */
965 voltage = le16_to_cpu(priv->calib_info->voltage);
966 init_voltage = (s32)le32_to_cpu(priv->card_alive_init.voltage);
967 voltage_compensation =
968 iwl4965_get_voltage_compensation(voltage, init_voltage);
969
970 IWL_DEBUG_TXPOWER(priv, "curr volt %d eeprom volt %d volt comp %d\n",
971 init_voltage,
972 voltage, voltage_compensation);
973
974 /* get current temperature (Celsius) */
975 current_temp = max(priv->temperature, IWL_TX_POWER_TEMPERATURE_MIN);
976 current_temp = min(priv->temperature, IWL_TX_POWER_TEMPERATURE_MAX);
977 current_temp = KELVIN_TO_CELSIUS(current_temp);
978
979 /* select thermal txpower adjustment params, based on channel group
980 * (same frequency group used for mimo txatten adjustment) */
981 degrees_per_05db_num =
982 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a;
983 degrees_per_05db_denom =
984 tx_power_cmp_tble[txatten_grp].degrees_per_05db_a_denom;
985
986 /* get per-chain txpower values from factory measurements */
987 for (c = 0; c < 2; c++) {
988 measurement = &ch_eeprom_info.measurements[c][1];
989
990 /* txgain adjustment (in half-dB steps) based on difference
991 * between factory and current temperature */
992 factory_temp = measurement->temperature;
993 iwl4965_math_div_round((current_temp - factory_temp) *
994 degrees_per_05db_denom,
995 degrees_per_05db_num,
996 &temperature_comp[c]);
997
998 factory_gain_index[c] = measurement->gain_idx;
999 factory_actual_pwr[c] = measurement->actual_pow;
1000
1001 IWL_DEBUG_TXPOWER(priv, "chain = %d\n", c);
1002 IWL_DEBUG_TXPOWER(priv, "fctry tmp %d, "
1003 "curr tmp %d, comp %d steps\n",
1004 factory_temp, current_temp,
1005 temperature_comp[c]);
1006
1007 IWL_DEBUG_TXPOWER(priv, "fctry idx %d, fctry pwr %d\n",
1008 factory_gain_index[c],
1009 factory_actual_pwr[c]);
1010 }
1011
1012 /* for each of 33 bit-rates (including 1 for CCK) */
1013 for (i = 0; i < POWER_TABLE_NUM_ENTRIES; i++) {
1014 u8 is_mimo_rate;
1015 union iwl4965_tx_power_dual_stream tx_power;
1016
1017 /* for mimo, reduce each chain's txpower by half
1018 * (3dB, 6 steps), so total output power is regulatory
1019 * compliant. */
1020 if (i & 0x8) {
1021 current_regulatory = reg_limit -
1022 IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION;
1023 is_mimo_rate = 1;
1024 } else {
1025 current_regulatory = reg_limit;
1026 is_mimo_rate = 0;
1027 }
1028
1029 /* find txpower limit, either hardware or regulatory */
1030 power_limit = saturation_power - back_off_table[i];
1031 if (power_limit > current_regulatory)
1032 power_limit = current_regulatory;
1033
1034 /* reduce user's txpower request if necessary
1035 * for this rate on this channel */
1036 target_power = user_target_power;
1037 if (target_power > power_limit)
1038 target_power = power_limit;
1039
1040 IWL_DEBUG_TXPOWER(priv, "rate %d sat %d reg %d usr %d tgt %d\n",
1041 i, saturation_power - back_off_table[i],
1042 current_regulatory, user_target_power,
1043 target_power);
1044
1045 /* for each of 2 Tx chains (radio transmitters) */
1046 for (c = 0; c < 2; c++) {
1047 s32 atten_value;
1048
1049 if (is_mimo_rate)
1050 atten_value =
1051 (s32)le32_to_cpu(priv->card_alive_init.
1052 tx_atten[txatten_grp][c]);
1053 else
1054 atten_value = 0;
1055
1056 /* calculate index; higher index means lower txpower */
1057 power_index = (u8) (factory_gain_index[c] -
1058 (target_power -
1059 factory_actual_pwr[c]) -
1060 temperature_comp[c] -
1061 voltage_compensation +
1062 atten_value);
1063
1064 /* IWL_DEBUG_TXPOWER(priv, "calculated txpower index %d\n",
1065 power_index); */
1066
1067 if (power_index < get_min_power_index(i, band))
1068 power_index = get_min_power_index(i, band);
1069
1070 /* adjust 5 GHz index to support negative indexes */
1071 if (!band)
1072 power_index += 9;
1073
1074 /* CCK, rate 32, reduce txpower for CCK */
1075 if (i == POWER_TABLE_CCK_ENTRY)
1076 power_index +=
1077 IWL_TX_POWER_CCK_COMPENSATION_C_STEP;
1078
1079 /* stay within the table! */
1080 if (power_index > 107) {
1081 IWL_WARN(priv, "txpower index %d > 107\n",
1082 power_index);
1083 power_index = 107;
1084 }
1085 if (power_index < 0) {
1086 IWL_WARN(priv, "txpower index %d < 0\n",
1087 power_index);
1088 power_index = 0;
1089 }
1090
1091 /* fill txpower command for this rate/chain */
1092 tx_power.s.radio_tx_gain[c] =
1093 gain_table[band][power_index].radio;
1094 tx_power.s.dsp_predis_atten[c] =
1095 gain_table[band][power_index].dsp;
1096
1097 IWL_DEBUG_TXPOWER(priv, "chain %d mimo %d index %d "
1098 "gain 0x%02x dsp %d\n",
1099 c, atten_value, power_index,
1100 tx_power.s.radio_tx_gain[c],
1101 tx_power.s.dsp_predis_atten[c]);
1102 } /* for each chain */
1103
1104 tx_power_tbl->power_tbl[i].dw = cpu_to_le32(tx_power.dw);
1105
1106 } /* for each rate */
1107
1108 return 0;
1109 }
1110
1111 /**
1112 * iwl4965_send_tx_power - Configure the TXPOWER level user limit
1113 *
1114 * Uses the active RXON for channel, band, and characteristics (ht40, high)
1115 * The power limit is taken from priv->tx_power_user_lmt.
1116 */
1117 static int iwl4965_send_tx_power(struct iwl_priv *priv)
1118 {
1119 struct iwl4965_txpowertable_cmd cmd = { 0 };
1120 int ret;
1121 u8 band = 0;
1122 bool is_ht40 = false;
1123 u8 ctrl_chan_high = 0;
1124 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1125
1126 if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
1127 "TX Power requested while scanning!\n"))
1128 return -EAGAIN;
1129
1130 band = priv->band == IEEE80211_BAND_2GHZ;
1131
1132 is_ht40 = iw4965_is_ht40_channel(ctx->active.flags);
1133
1134 if (is_ht40 && (ctx->active.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1135 ctrl_chan_high = 1;
1136
1137 cmd.band = band;
1138 cmd.channel = ctx->active.channel;
1139
1140 ret = iwl4965_fill_txpower_tbl(priv, band,
1141 le16_to_cpu(ctx->active.channel),
1142 is_ht40, ctrl_chan_high, &cmd.tx_power);
1143 if (ret)
1144 goto out;
1145
1146 ret = iwl_legacy_send_cmd_pdu(priv,
1147 REPLY_TX_PWR_TABLE_CMD, sizeof(cmd), &cmd);
1148
1149 out:
1150 return ret;
1151 }
1152
1153 static int iwl4965_send_rxon_assoc(struct iwl_priv *priv,
1154 struct iwl_rxon_context *ctx)
1155 {
1156 int ret = 0;
1157 struct iwl4965_rxon_assoc_cmd rxon_assoc;
1158 const struct iwl_legacy_rxon_cmd *rxon1 = &ctx->staging;
1159 const struct iwl_legacy_rxon_cmd *rxon2 = &ctx->active;
1160
1161 if ((rxon1->flags == rxon2->flags) &&
1162 (rxon1->filter_flags == rxon2->filter_flags) &&
1163 (rxon1->cck_basic_rates == rxon2->cck_basic_rates) &&
1164 (rxon1->ofdm_ht_single_stream_basic_rates ==
1165 rxon2->ofdm_ht_single_stream_basic_rates) &&
1166 (rxon1->ofdm_ht_dual_stream_basic_rates ==
1167 rxon2->ofdm_ht_dual_stream_basic_rates) &&
1168 (rxon1->rx_chain == rxon2->rx_chain) &&
1169 (rxon1->ofdm_basic_rates == rxon2->ofdm_basic_rates)) {
1170 IWL_DEBUG_INFO(priv, "Using current RXON_ASSOC. Not resending.\n");
1171 return 0;
1172 }
1173
1174 rxon_assoc.flags = ctx->staging.flags;
1175 rxon_assoc.filter_flags = ctx->staging.filter_flags;
1176 rxon_assoc.ofdm_basic_rates = ctx->staging.ofdm_basic_rates;
1177 rxon_assoc.cck_basic_rates = ctx->staging.cck_basic_rates;
1178 rxon_assoc.reserved = 0;
1179 rxon_assoc.ofdm_ht_single_stream_basic_rates =
1180 ctx->staging.ofdm_ht_single_stream_basic_rates;
1181 rxon_assoc.ofdm_ht_dual_stream_basic_rates =
1182 ctx->staging.ofdm_ht_dual_stream_basic_rates;
1183 rxon_assoc.rx_chain_select_flags = ctx->staging.rx_chain;
1184
1185 ret = iwl_legacy_send_cmd_pdu_async(priv, REPLY_RXON_ASSOC,
1186 sizeof(rxon_assoc), &rxon_assoc, NULL);
1187
1188 return ret;
1189 }
1190
1191 static int iwl4965_commit_rxon(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
1192 {
1193 /* cast away the const for active_rxon in this function */
1194 struct iwl_legacy_rxon_cmd *active_rxon = (void *)&ctx->active;
1195 int ret;
1196 bool new_assoc =
1197 !!(ctx->staging.filter_flags & RXON_FILTER_ASSOC_MSK);
1198
1199 if (!iwl_legacy_is_alive(priv))
1200 return -EBUSY;
1201
1202 if (!ctx->is_active)
1203 return 0;
1204
1205 /* always get timestamp with Rx frame */
1206 ctx->staging.flags |= RXON_FLG_TSF2HOST_MSK;
1207
1208 ret = iwl_legacy_check_rxon_cmd(priv, ctx);
1209 if (ret) {
1210 IWL_ERR(priv, "Invalid RXON configuration. Not committing.\n");
1211 return -EINVAL;
1212 }
1213
1214 /*
1215 * receive commit_rxon request
1216 * abort any previous channel switch if still in process
1217 */
1218 if (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1219 (priv->switch_channel != ctx->staging.channel)) {
1220 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1221 le16_to_cpu(priv->switch_channel));
1222 iwl_legacy_chswitch_done(priv, false);
1223 }
1224
1225 /* If we don't need to send a full RXON, we can use
1226 * iwl_rxon_assoc_cmd which is used to reconfigure filter
1227 * and other flags for the current radio configuration. */
1228 if (!iwl_legacy_full_rxon_required(priv, ctx)) {
1229 ret = iwl_legacy_send_rxon_assoc(priv, ctx);
1230 if (ret) {
1231 IWL_ERR(priv, "Error setting RXON_ASSOC (%d)\n", ret);
1232 return ret;
1233 }
1234
1235 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1236 iwl_legacy_print_rx_config_cmd(priv, ctx);
1237 /*
1238 * We do not commit tx power settings while channel changing,
1239 * do it now if tx power changed.
1240 */
1241 iwl_legacy_set_tx_power(priv, priv->tx_power_next, false);
1242 return 0;
1243 }
1244
1245 /* If we are currently associated and the new config requires
1246 * an RXON_ASSOC and the new config wants the associated mask enabled,
1247 * we must clear the associated from the active configuration
1248 * before we apply the new config */
1249 if (iwl_legacy_is_associated_ctx(ctx) && new_assoc) {
1250 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
1251 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1252
1253 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1254 sizeof(struct iwl_legacy_rxon_cmd),
1255 active_rxon);
1256
1257 /* If the mask clearing failed then we set
1258 * active_rxon back to what it was previously */
1259 if (ret) {
1260 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1261 IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
1262 return ret;
1263 }
1264 iwl_legacy_clear_ucode_stations(priv, ctx);
1265 iwl_legacy_restore_stations(priv, ctx);
1266 ret = iwl4965_restore_default_wep_keys(priv, ctx);
1267 if (ret) {
1268 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
1269 return ret;
1270 }
1271 }
1272
1273 IWL_DEBUG_INFO(priv, "Sending RXON\n"
1274 "* with%s RXON_FILTER_ASSOC_MSK\n"
1275 "* channel = %d\n"
1276 "* bssid = %pM\n",
1277 (new_assoc ? "" : "out"),
1278 le16_to_cpu(ctx->staging.channel),
1279 ctx->staging.bssid_addr);
1280
1281 iwl_legacy_set_rxon_hwcrypto(priv, ctx,
1282 !priv->cfg->mod_params->sw_crypto);
1283
1284 /* Apply the new configuration
1285 * RXON unassoc clears the station table in uCode so restoration of
1286 * stations is needed after it (the RXON command) completes
1287 */
1288 if (!new_assoc) {
1289 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1290 sizeof(struct iwl_legacy_rxon_cmd), &ctx->staging);
1291 if (ret) {
1292 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
1293 return ret;
1294 }
1295 IWL_DEBUG_INFO(priv, "Return from !new_assoc RXON.\n");
1296 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1297 iwl_legacy_clear_ucode_stations(priv, ctx);
1298 iwl_legacy_restore_stations(priv, ctx);
1299 ret = iwl4965_restore_default_wep_keys(priv, ctx);
1300 if (ret) {
1301 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
1302 return ret;
1303 }
1304 }
1305 if (new_assoc) {
1306 priv->start_calib = 0;
1307 /* Apply the new configuration
1308 * RXON assoc doesn't clear the station table in uCode,
1309 */
1310 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1311 sizeof(struct iwl_legacy_rxon_cmd), &ctx->staging);
1312 if (ret) {
1313 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
1314 return ret;
1315 }
1316 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1317 }
1318 iwl_legacy_print_rx_config_cmd(priv, ctx);
1319
1320 iwl4965_init_sensitivity(priv);
1321
1322 /* If we issue a new RXON command which required a tune then we must
1323 * send a new TXPOWER command or we won't be able to Tx any frames */
1324 ret = iwl_legacy_set_tx_power(priv, priv->tx_power_next, true);
1325 if (ret) {
1326 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
1327 return ret;
1328 }
1329
1330 return 0;
1331 }
1332
1333 static int iwl4965_hw_channel_switch(struct iwl_priv *priv,
1334 struct ieee80211_channel_switch *ch_switch)
1335 {
1336 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1337 int rc;
1338 u8 band = 0;
1339 bool is_ht40 = false;
1340 u8 ctrl_chan_high = 0;
1341 struct iwl4965_channel_switch_cmd cmd;
1342 const struct iwl_channel_info *ch_info;
1343 u32 switch_time_in_usec, ucode_switch_time;
1344 u16 ch;
1345 u32 tsf_low;
1346 u8 switch_count;
1347 u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
1348 struct ieee80211_vif *vif = ctx->vif;
1349 band = priv->band == IEEE80211_BAND_2GHZ;
1350
1351 is_ht40 = iw4965_is_ht40_channel(ctx->staging.flags);
1352
1353 if (is_ht40 &&
1354 (ctx->staging.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1355 ctrl_chan_high = 1;
1356
1357 cmd.band = band;
1358 cmd.expect_beacon = 0;
1359 ch = ch_switch->channel->hw_value;
1360 cmd.channel = cpu_to_le16(ch);
1361 cmd.rxon_flags = ctx->staging.flags;
1362 cmd.rxon_filter_flags = ctx->staging.filter_flags;
1363 switch_count = ch_switch->count;
1364 tsf_low = ch_switch->timestamp & 0x0ffffffff;
1365 /*
1366 * calculate the ucode channel switch time
1367 * adding TSF as one of the factor for when to switch
1368 */
1369 if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
1370 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
1371 beacon_interval)) {
1372 switch_count -= (priv->ucode_beacon_time -
1373 tsf_low) / beacon_interval;
1374 } else
1375 switch_count = 0;
1376 }
1377 if (switch_count <= 1)
1378 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1379 else {
1380 switch_time_in_usec =
1381 vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
1382 ucode_switch_time = iwl_legacy_usecs_to_beacons(priv,
1383 switch_time_in_usec,
1384 beacon_interval);
1385 cmd.switch_time = iwl_legacy_add_beacon_time(priv,
1386 priv->ucode_beacon_time,
1387 ucode_switch_time,
1388 beacon_interval);
1389 }
1390 IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
1391 cmd.switch_time);
1392 ch_info = iwl_legacy_get_channel_info(priv, priv->band, ch);
1393 if (ch_info)
1394 cmd.expect_beacon = iwl_legacy_is_channel_radar(ch_info);
1395 else {
1396 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
1397 ctx->active.channel, ch);
1398 return -EFAULT;
1399 }
1400
1401 rc = iwl4965_fill_txpower_tbl(priv, band, ch, is_ht40,
1402 ctrl_chan_high, &cmd.tx_power);
1403 if (rc) {
1404 IWL_DEBUG_11H(priv, "error:%d fill txpower_tbl\n", rc);
1405 return rc;
1406 }
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_error_log = iwl4965_dump_nic_error_log,
2076 .dump_fh = iwl4965_dump_fh,
2077 .set_channel_switch = iwl4965_hw_channel_switch,
2078 .apm_ops = {
2079 .init = iwl_legacy_apm_init,
2080 .config = iwl4965_nic_config,
2081 },
2082 .eeprom_ops = {
2083 .regulatory_bands = {
2084 EEPROM_REGULATORY_BAND_1_CHANNELS,
2085 EEPROM_REGULATORY_BAND_2_CHANNELS,
2086 EEPROM_REGULATORY_BAND_3_CHANNELS,
2087 EEPROM_REGULATORY_BAND_4_CHANNELS,
2088 EEPROM_REGULATORY_BAND_5_CHANNELS,
2089 EEPROM_4965_REGULATORY_BAND_24_HT40_CHANNELS,
2090 EEPROM_4965_REGULATORY_BAND_52_HT40_CHANNELS
2091 },
2092 .acquire_semaphore = iwl4965_eeprom_acquire_semaphore,
2093 .release_semaphore = iwl4965_eeprom_release_semaphore,
2094 },
2095 .send_tx_power = iwl4965_send_tx_power,
2096 .update_chain_flags = iwl4965_update_chain_flags,
2097 .temp_ops = {
2098 .temperature = iwl4965_temperature_calib,
2099 },
2100 .debugfs_ops = {
2101 .rx_stats_read = iwl4965_ucode_rx_stats_read,
2102 .tx_stats_read = iwl4965_ucode_tx_stats_read,
2103 .general_stats_read = iwl4965_ucode_general_stats_read,
2104 },
2105 };
2106
2107 static const struct iwl_legacy_ops iwl4965_legacy_ops = {
2108 .post_associate = iwl4965_post_associate,
2109 .config_ap = iwl4965_config_ap,
2110 .manage_ibss_station = iwl4965_manage_ibss_station,
2111 .update_bcast_stations = iwl4965_update_bcast_stations,
2112 };
2113
2114 struct ieee80211_ops iwl4965_hw_ops = {
2115 .tx = iwl4965_mac_tx,
2116 .start = iwl4965_mac_start,
2117 .stop = iwl4965_mac_stop,
2118 .add_interface = iwl_legacy_mac_add_interface,
2119 .remove_interface = iwl_legacy_mac_remove_interface,
2120 .change_interface = iwl_legacy_mac_change_interface,
2121 .config = iwl_legacy_mac_config,
2122 .configure_filter = iwl4965_configure_filter,
2123 .set_key = iwl4965_mac_set_key,
2124 .update_tkip_key = iwl4965_mac_update_tkip_key,
2125 .conf_tx = iwl_legacy_mac_conf_tx,
2126 .reset_tsf = iwl_legacy_mac_reset_tsf,
2127 .bss_info_changed = iwl_legacy_mac_bss_info_changed,
2128 .ampdu_action = iwl4965_mac_ampdu_action,
2129 .hw_scan = iwl_legacy_mac_hw_scan,
2130 .sta_add = iwl4965_mac_sta_add,
2131 .sta_remove = iwl_legacy_mac_sta_remove,
2132 .channel_switch = iwl4965_mac_channel_switch,
2133 .tx_last_beacon = iwl_legacy_mac_tx_last_beacon,
2134 };
2135
2136 static const struct iwl_ops iwl4965_ops = {
2137 .lib = &iwl4965_lib,
2138 .hcmd = &iwl4965_hcmd,
2139 .utils = &iwl4965_hcmd_utils,
2140 .led = &iwl4965_led_ops,
2141 .legacy = &iwl4965_legacy_ops,
2142 .ieee80211_ops = &iwl4965_hw_ops,
2143 };
2144
2145 static struct iwl_base_params iwl4965_base_params = {
2146 .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
2147 .num_of_queues = IWL49_NUM_QUEUES,
2148 .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
2149 .pll_cfg_val = 0,
2150 .set_l0s = true,
2151 .use_bsm = true,
2152 .led_compensation = 61,
2153 .chain_noise_num_beacons = IWL4965_CAL_NUM_BEACONS,
2154 .wd_timeout = IWL_DEF_WD_TIMEOUT,
2155 .temperature_kelvin = true,
2156 .ucode_tracing = true,
2157 .sensitivity_calib_by_driver = true,
2158 .chain_noise_calib_by_driver = true,
2159 };
2160
2161 struct iwl_cfg iwl4965_cfg = {
2162 .name = "Intel(R) Wireless WiFi Link 4965AGN",
2163 .fw_name_pre = IWL4965_FW_PRE,
2164 .ucode_api_max = IWL4965_UCODE_API_MAX,
2165 .ucode_api_min = IWL4965_UCODE_API_MIN,
2166 .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
2167 .valid_tx_ant = ANT_AB,
2168 .valid_rx_ant = ANT_ABC,
2169 .eeprom_ver = EEPROM_4965_EEPROM_VERSION,
2170 .eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
2171 .ops = &iwl4965_ops,
2172 .mod_params = &iwl4965_mod_params,
2173 .base_params = &iwl4965_base_params,
2174 .led_mode = IWL_LED_BLINK,
2175 /*
2176 * Force use of chains B and C for scan RX on 5 GHz band
2177 * because the device has off-channel reception on chain A.
2178 */
2179 .scan_rx_antennas[IEEE80211_BAND_5GHZ] = ANT_BC,
2180 };
2181
2182 /* Module firmware */
2183 MODULE_FIRMWARE(IWL4965_MODULE_FIRMWARE(IWL4965_UCODE_API_MAX));
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