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Merge branch 'for-linus' of git://git.infradead.org/users/sameo/mfd-2.6
[linux-btrfs-devel.git] / drivers / net / wireless / iwlegacy / iwl-4965.c
blobecdc6e557428ee4d777f955408fc8054fd1c82d5
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 (test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status) &&
1220 (priv->switch_channel != ctx->staging.channel)) {
1221 IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
1222 le16_to_cpu(priv->switch_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 /*
1239 * We do not commit tx power settings while channel changing,
1240 * do it now if tx power changed.
1241 */
1242 iwl_legacy_set_tx_power(priv, priv->tx_power_next, false);
1243 return 0;
1244 }
1245
1246 /* If we are currently associated and the new config requires
1247 * an RXON_ASSOC and the new config wants the associated mask enabled,
1248 * we must clear the associated from the active configuration
1249 * before we apply the new config */
1250 if (iwl_legacy_is_associated_ctx(ctx) && new_assoc) {
1251 IWL_DEBUG_INFO(priv, "Toggling associated bit on current RXON\n");
1252 active_rxon->filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1253
1254 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1255 sizeof(struct iwl_legacy_rxon_cmd),
1256 active_rxon);
1257
1258 /* If the mask clearing failed then we set
1259 * active_rxon back to what it was previously */
1260 if (ret) {
1261 active_rxon->filter_flags |= RXON_FILTER_ASSOC_MSK;
1262 IWL_ERR(priv, "Error clearing ASSOC_MSK (%d)\n", ret);
1263 return ret;
1264 }
1265 iwl_legacy_clear_ucode_stations(priv, ctx);
1266 iwl_legacy_restore_stations(priv, ctx);
1267 ret = iwl4965_restore_default_wep_keys(priv, ctx);
1268 if (ret) {
1269 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
1270 return ret;
1271 }
1272 }
1273
1274 IWL_DEBUG_INFO(priv, "Sending RXON\n"
1275 "* with%s RXON_FILTER_ASSOC_MSK\n"
1276 "* channel = %d\n"
1277 "* bssid = %pM\n",
1278 (new_assoc ? "" : "out"),
1279 le16_to_cpu(ctx->staging.channel),
1280 ctx->staging.bssid_addr);
1281
1282 iwl_legacy_set_rxon_hwcrypto(priv, ctx,
1283 !priv->cfg->mod_params->sw_crypto);
1284
1285 /* Apply the new configuration
1286 * RXON unassoc clears the station table in uCode so restoration of
1287 * stations is needed after it (the RXON command) completes
1288 */
1289 if (!new_assoc) {
1290 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1291 sizeof(struct iwl_legacy_rxon_cmd), &ctx->staging);
1292 if (ret) {
1293 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
1294 return ret;
1295 }
1296 IWL_DEBUG_INFO(priv, "Return from !new_assoc RXON.\n");
1297 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1298 iwl_legacy_clear_ucode_stations(priv, ctx);
1299 iwl_legacy_restore_stations(priv, ctx);
1300 ret = iwl4965_restore_default_wep_keys(priv, ctx);
1301 if (ret) {
1302 IWL_ERR(priv, "Failed to restore WEP keys (%d)\n", ret);
1303 return ret;
1304 }
1305 }
1306 if (new_assoc) {
1307 priv->start_calib = 0;
1308 /* Apply the new configuration
1309 * RXON assoc doesn't clear the station table in uCode,
1310 */
1311 ret = iwl_legacy_send_cmd_pdu(priv, ctx->rxon_cmd,
1312 sizeof(struct iwl_legacy_rxon_cmd), &ctx->staging);
1313 if (ret) {
1314 IWL_ERR(priv, "Error setting new RXON (%d)\n", ret);
1315 return ret;
1316 }
1317 memcpy(active_rxon, &ctx->staging, sizeof(*active_rxon));
1318 }
1319 iwl_legacy_print_rx_config_cmd(priv, ctx);
1320
1321 iwl4965_init_sensitivity(priv);
1322
1323 /* If we issue a new RXON command which required a tune then we must
1324 * send a new TXPOWER command or we won't be able to Tx any frames */
1325 ret = iwl_legacy_set_tx_power(priv, priv->tx_power_next, true);
1326 if (ret) {
1327 IWL_ERR(priv, "Error sending TX power (%d)\n", ret);
1328 return ret;
1329 }
1330
1331 return 0;
1332 }
1333
1334 static int iwl4965_hw_channel_switch(struct iwl_priv *priv,
1335 struct ieee80211_channel_switch *ch_switch)
1336 {
1337 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1338 int rc;
1339 u8 band = 0;
1340 bool is_ht40 = false;
1341 u8 ctrl_chan_high = 0;
1342 struct iwl4965_channel_switch_cmd cmd;
1343 const struct iwl_channel_info *ch_info;
1344 u32 switch_time_in_usec, ucode_switch_time;
1345 u16 ch;
1346 u32 tsf_low;
1347 u8 switch_count;
1348 u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
1349 struct ieee80211_vif *vif = ctx->vif;
1350 band = priv->band == IEEE80211_BAND_2GHZ;
1351
1352 is_ht40 = iw4965_is_ht40_channel(ctx->staging.flags);
1353
1354 if (is_ht40 &&
1355 (ctx->staging.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
1356 ctrl_chan_high = 1;
1357
1358 cmd.band = band;
1359 cmd.expect_beacon = 0;
1360 ch = ch_switch->channel->hw_value;
1361 cmd.channel = cpu_to_le16(ch);
1362 cmd.rxon_flags = ctx->staging.flags;
1363 cmd.rxon_filter_flags = ctx->staging.filter_flags;
1364 switch_count = ch_switch->count;
1365 tsf_low = ch_switch->timestamp & 0x0ffffffff;
1366 /*
1367 * calculate the ucode channel switch time
1368 * adding TSF as one of the factor for when to switch
1369 */
1370 if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
1371 if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
1372 beacon_interval)) {
1373 switch_count -= (priv->ucode_beacon_time -
1374 tsf_low) / beacon_interval;
1375 } else
1376 switch_count = 0;
1377 }
1378 if (switch_count <= 1)
1379 cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
1380 else {
1381 switch_time_in_usec =
1382 vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
1383 ucode_switch_time = iwl_legacy_usecs_to_beacons(priv,
1384 switch_time_in_usec,
1385 beacon_interval);
1386 cmd.switch_time = iwl_legacy_add_beacon_time(priv,
1387 priv->ucode_beacon_time,
1388 ucode_switch_time,
1389 beacon_interval);
1390 }
1391 IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
1392 cmd.switch_time);
1393 ch_info = iwl_legacy_get_channel_info(priv, priv->band, ch);
1394 if (ch_info)
1395 cmd.expect_beacon = iwl_legacy_is_channel_radar(ch_info);
1396 else {
1397 IWL_ERR(priv, "invalid channel switch from %u to %u\n",
1398 ctx->active.channel, ch);
1399 return -EFAULT;
1400 }
1401
1402 rc = iwl4965_fill_txpower_tbl(priv, band, ch, is_ht40,
1403 ctrl_chan_high, &cmd.tx_power);
1404 if (rc) {
1405 IWL_DEBUG_11H(priv, "error:%d fill txpower_tbl\n", rc);
1406 return rc;
1407 }
1408
1409 return iwl_legacy_send_cmd_pdu(priv,
1410 REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
1411 }
1412
1413 /**
1414 * iwl4965_txq_update_byte_cnt_tbl - Set up entry in Tx byte-count array
1415 */
1416 static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
1417 struct iwl_tx_queue *txq,
1418 u16 byte_cnt)
1419 {
1420 struct iwl4965_scd_bc_tbl *scd_bc_tbl = priv->scd_bc_tbls.addr;
1421 int txq_id = txq->q.id;
1422 int write_ptr = txq->q.write_ptr;
1423 int len = byte_cnt + IWL_TX_CRC_SIZE + IWL_TX_DELIMITER_SIZE;
1424 __le16 bc_ent;
1425
1426 WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX);
1427
1428 bc_ent = cpu_to_le16(len & 0xFFF);
1429 /* Set up byte count within first 256 entries */
1430 scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;
1431
1432 /* If within first 64 entries, duplicate at end */
1433 if (write_ptr < TFD_QUEUE_SIZE_BC_DUP)
1434 scd_bc_tbl[txq_id].
1435 tfd_offset[TFD_QUEUE_SIZE_MAX + write_ptr] = bc_ent;
1436 }
1437
1438 /**
1439 * iwl4965_hw_get_temperature - return the calibrated temperature (in Kelvin)
1440 * @statistics: Provides the temperature reading from the uCode
1441 *
1442 * A return of <0 indicates bogus data in the statistics
1443 */
1444 static int iwl4965_hw_get_temperature(struct iwl_priv *priv)
1445 {
1446 s32 temperature;
1447 s32 vt;
1448 s32 R1, R2, R3;
1449 u32 R4;
1450
1451 if (test_bit(STATUS_TEMPERATURE, &priv->status) &&
1452 (priv->_4965.statistics.flag &
1453 STATISTICS_REPLY_FLG_HT40_MODE_MSK)) {
1454 IWL_DEBUG_TEMP(priv, "Running HT40 temperature calibration\n");
1455 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[1]);
1456 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[1]);
1457 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[1]);
1458 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[1]);
1459 } else {
1460 IWL_DEBUG_TEMP(priv, "Running temperature calibration\n");
1461 R1 = (s32)le32_to_cpu(priv->card_alive_init.therm_r1[0]);
1462 R2 = (s32)le32_to_cpu(priv->card_alive_init.therm_r2[0]);
1463 R3 = (s32)le32_to_cpu(priv->card_alive_init.therm_r3[0]);
1464 R4 = le32_to_cpu(priv->card_alive_init.therm_r4[0]);
1465 }
1466
1467 /*
1468 * Temperature is only 23 bits, so sign extend out to 32.
1469 *
1470 * NOTE If we haven't received a statistics notification yet
1471 * with an updated temperature, use R4 provided to us in the
1472 * "initialize" ALIVE response.
1473 */
1474 if (!test_bit(STATUS_TEMPERATURE, &priv->status))
1475 vt = sign_extend32(R4, 23);
1476 else
1477 vt = sign_extend32(le32_to_cpu(priv->_4965.statistics.
1478 general.common.temperature), 23);
1479
1480 IWL_DEBUG_TEMP(priv, "Calib values R[1-3]: %d %d %d R4: %d\n", R1, R2, R3, vt);
1481
1482 if (R3 == R1) {
1483 IWL_ERR(priv, "Calibration conflict R1 == R3\n");
1484 return -1;
1485 }
1486
1487 /* Calculate temperature in degrees Kelvin, adjust by 97%.
1488 * Add offset to center the adjustment around 0 degrees Centigrade. */
1489 temperature = TEMPERATURE_CALIB_A_VAL * (vt - R2);
1490 temperature /= (R3 - R1);
1491 temperature = (temperature * 97) / 100 + TEMPERATURE_CALIB_KELVIN_OFFSET;
1492
1493 IWL_DEBUG_TEMP(priv, "Calibrated temperature: %dK, %dC\n",
1494 temperature, KELVIN_TO_CELSIUS(temperature));
1495
1496 return temperature;
1497 }
1498
1499 /* Adjust Txpower only if temperature variance is greater than threshold. */
1500 #define IWL_TEMPERATURE_THRESHOLD 3
1501
1502 /**
1503 * iwl4965_is_temp_calib_needed - determines if new calibration is needed
1504 *
1505 * If the temperature changed has changed sufficiently, then a recalibration
1506 * is needed.
1507 *
1508 * Assumes caller will replace priv->last_temperature once calibration
1509 * executed.
1510 */
1511 static int iwl4965_is_temp_calib_needed(struct iwl_priv *priv)
1512 {
1513 int temp_diff;
1514
1515 if (!test_bit(STATUS_STATISTICS, &priv->status)) {
1516 IWL_DEBUG_TEMP(priv, "Temperature not updated -- no statistics.\n");
1517 return 0;
1518 }
1519
1520 temp_diff = priv->temperature - priv->last_temperature;
1521
1522 /* get absolute value */
1523 if (temp_diff < 0) {
1524 IWL_DEBUG_POWER(priv, "Getting cooler, delta %d\n", temp_diff);
1525 temp_diff = -temp_diff;
1526 } else if (temp_diff == 0)
1527 IWL_DEBUG_POWER(priv, "Temperature unchanged\n");
1528 else
1529 IWL_DEBUG_POWER(priv, "Getting warmer, delta %d\n", temp_diff);
1530
1531 if (temp_diff < IWL_TEMPERATURE_THRESHOLD) {
1532 IWL_DEBUG_POWER(priv, " => thermal txpower calib not needed\n");
1533 return 0;
1534 }
1535
1536 IWL_DEBUG_POWER(priv, " => thermal txpower calib needed\n");
1537
1538 return 1;
1539 }
1540
1541 static void iwl4965_temperature_calib(struct iwl_priv *priv)
1542 {
1543 s32 temp;
1544
1545 temp = iwl4965_hw_get_temperature(priv);
1546 if (IWL_TX_POWER_TEMPERATURE_OUT_OF_RANGE(temp))
1547 return;
1548
1549 if (priv->temperature != temp) {
1550 if (priv->temperature)
1551 IWL_DEBUG_TEMP(priv, "Temperature changed "
1552 "from %dC to %dC\n",
1553 KELVIN_TO_CELSIUS(priv->temperature),
1554 KELVIN_TO_CELSIUS(temp));
1555 else
1556 IWL_DEBUG_TEMP(priv, "Temperature "
1557 "initialized to %dC\n",
1558 KELVIN_TO_CELSIUS(temp));
1559 }
1560
1561 priv->temperature = temp;
1562 set_bit(STATUS_TEMPERATURE, &priv->status);
1563
1564 if (!priv->disable_tx_power_cal &&
1565 unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
1566 iwl4965_is_temp_calib_needed(priv))
1567 queue_work(priv->workqueue, &priv->txpower_work);
1568 }
1569
1570 static u16 iwl4965_get_hcmd_size(u8 cmd_id, u16 len)
1571 {
1572 switch (cmd_id) {
1573 case REPLY_RXON:
1574 return (u16) sizeof(struct iwl4965_rxon_cmd);
1575 default:
1576 return len;
1577 }
1578 }
1579
1580 static u16 iwl4965_build_addsta_hcmd(const struct iwl_legacy_addsta_cmd *cmd,
1581 u8 *data)
1582 {
1583 struct iwl4965_addsta_cmd *addsta = (struct iwl4965_addsta_cmd *)data;
1584 addsta->mode = cmd->mode;
1585 memcpy(&addsta->sta, &cmd->sta, sizeof(struct sta_id_modify));
1586 memcpy(&addsta->key, &cmd->key, sizeof(struct iwl4965_keyinfo));
1587 addsta->station_flags = cmd->station_flags;
1588 addsta->station_flags_msk = cmd->station_flags_msk;
1589 addsta->tid_disable_tx = cmd->tid_disable_tx;
1590 addsta->add_immediate_ba_tid = cmd->add_immediate_ba_tid;
1591 addsta->remove_immediate_ba_tid = cmd->remove_immediate_ba_tid;
1592 addsta->add_immediate_ba_ssn = cmd->add_immediate_ba_ssn;
1593 addsta->sleep_tx_count = cmd->sleep_tx_count;
1594 addsta->reserved1 = cpu_to_le16(0);
1595 addsta->reserved2 = cpu_to_le16(0);
1596
1597 return (u16)sizeof(struct iwl4965_addsta_cmd);
1598 }
1599
1600 static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
1601 {
1602 return le32_to_cpup(&tx_resp->u.status + tx_resp->frame_count) & MAX_SN;
1603 }
1604
1605 /**
1606 * iwl4965_tx_status_reply_tx - Handle Tx response for frames in aggregation queue
1607 */
1608 static int iwl4965_tx_status_reply_tx(struct iwl_priv *priv,
1609 struct iwl_ht_agg *agg,
1610 struct iwl4965_tx_resp *tx_resp,
1611 int txq_id, u16 start_idx)
1612 {
1613 u16 status;
1614 struct agg_tx_status *frame_status = tx_resp->u.agg_status;
1615 struct ieee80211_tx_info *info = NULL;
1616 struct ieee80211_hdr *hdr = NULL;
1617 u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
1618 int i, sh, idx;
1619 u16 seq;
1620 if (agg->wait_for_ba)
1621 IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n");
1622
1623 agg->frame_count = tx_resp->frame_count;
1624 agg->start_idx = start_idx;
1625 agg->rate_n_flags = rate_n_flags;
1626 agg->bitmap = 0;
1627
1628 /* num frames attempted by Tx command */
1629 if (agg->frame_count == 1) {
1630 /* Only one frame was attempted; no block-ack will arrive */
1631 status = le16_to_cpu(frame_status[0].status);
1632 idx = start_idx;
1633
1634 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n",
1635 agg->frame_count, agg->start_idx, idx);
1636
1637 info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb);
1638 info->status.rates[0].count = tx_resp->failure_frame + 1;
1639 info->flags &= ~IEEE80211_TX_CTL_AMPDU;
1640 info->flags |= iwl4965_tx_status_to_mac80211(status);
1641 iwl4965_hwrate_to_tx_control(priv, rate_n_flags, info);
1642
1643 IWL_DEBUG_TX_REPLY(priv, "1 Frame 0x%x failure :%d\n",
1644 status & 0xff, tx_resp->failure_frame);
1645 IWL_DEBUG_TX_REPLY(priv, "Rate Info rate_n_flags=%x\n", rate_n_flags);
1646
1647 agg->wait_for_ba = 0;
1648 } else {
1649 /* Two or more frames were attempted; expect block-ack */
1650 u64 bitmap = 0;
1651 int start = agg->start_idx;
1652
1653 /* Construct bit-map of pending frames within Tx window */
1654 for (i = 0; i < agg->frame_count; i++) {
1655 u16 sc;
1656 status = le16_to_cpu(frame_status[i].status);
1657 seq = le16_to_cpu(frame_status[i].sequence);
1658 idx = SEQ_TO_INDEX(seq);
1659 txq_id = SEQ_TO_QUEUE(seq);
1660
1661 if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
1662 AGG_TX_STATE_ABORT_MSK))
1663 continue;
1664
1665 IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n",
1666 agg->frame_count, txq_id, idx);
1667
1668 hdr = iwl_legacy_tx_queue_get_hdr(priv, txq_id, idx);
1669 if (!hdr) {
1670 IWL_ERR(priv,
1671 "BUG_ON idx doesn't point to valid skb"
1672 " idx=%d, txq_id=%d\n", idx, txq_id);
1673 return -1;
1674 }
1675
1676 sc = le16_to_cpu(hdr->seq_ctrl);
1677 if (idx != (SEQ_TO_SN(sc) & 0xff)) {
1678 IWL_ERR(priv,
1679 "BUG_ON idx doesn't match seq control"
1680 " idx=%d, seq_idx=%d, seq=%d\n",
1681 idx, SEQ_TO_SN(sc), hdr->seq_ctrl);
1682 return -1;
1683 }
1684
1685 IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n",
1686 i, idx, SEQ_TO_SN(sc));
1687
1688 sh = idx - start;
1689 if (sh > 64) {
1690 sh = (start - idx) + 0xff;
1691 bitmap = bitmap << sh;
1692 sh = 0;
1693 start = idx;
1694 } else if (sh < -64)
1695 sh = 0xff - (start - idx);
1696 else if (sh < 0) {
1697 sh = start - idx;
1698 start = idx;
1699 bitmap = bitmap << sh;
1700 sh = 0;
1701 }
1702 bitmap |= 1ULL << sh;
1703 IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n",
1704 start, (unsigned long long)bitmap);
1705 }
1706
1707 agg->bitmap = bitmap;
1708 agg->start_idx = start;
1709 IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n",
1710 agg->frame_count, agg->start_idx,
1711 (unsigned long long)agg->bitmap);
1712
1713 if (bitmap)
1714 agg->wait_for_ba = 1;
1715 }
1716 return 0;
1717 }
1718
1719 static u8 iwl4965_find_station(struct iwl_priv *priv, const u8 *addr)
1720 {
1721 int i;
1722 int start = 0;
1723 int ret = IWL_INVALID_STATION;
1724 unsigned long flags;
1725
1726 if ((priv->iw_mode == NL80211_IFTYPE_ADHOC))
1727 start = IWL_STA_ID;
1728
1729 if (is_broadcast_ether_addr(addr))
1730 return priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id;
1731
1732 spin_lock_irqsave(&priv->sta_lock, flags);
1733 for (i = start; i < priv->hw_params.max_stations; i++)
1734 if (priv->stations[i].used &&
1735 (!compare_ether_addr(priv->stations[i].sta.sta.addr,
1736 addr))) {
1737 ret = i;
1738 goto out;
1739 }
1740
1741 IWL_DEBUG_ASSOC_LIMIT(priv, "can not find STA %pM total %d\n",
1742 addr, priv->num_stations);
1743
1744 out:
1745 /*
1746 * It may be possible that more commands interacting with stations
1747 * arrive before we completed processing the adding of
1748 * station
1749 */
1750 if (ret != IWL_INVALID_STATION &&
1751 (!(priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) ||
1752 ((priv->stations[ret].used & IWL_STA_UCODE_ACTIVE) &&
1753 (priv->stations[ret].used & IWL_STA_UCODE_INPROGRESS)))) {
1754 IWL_ERR(priv, "Requested station info for sta %d before ready.\n",
1755 ret);
1756 ret = IWL_INVALID_STATION;
1757 }
1758 spin_unlock_irqrestore(&priv->sta_lock, flags);
1759 return ret;
1760 }
1761
1762 static int iwl4965_get_ra_sta_id(struct iwl_priv *priv, struct ieee80211_hdr *hdr)
1763 {
1764 if (priv->iw_mode == NL80211_IFTYPE_STATION) {
1765 return IWL_AP_ID;
1766 } else {
1767 u8 *da = ieee80211_get_DA(hdr);
1768 return iwl4965_find_station(priv, da);
1769 }
1770 }
1771
1772 /**
1773 * iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
1774 */
1775 static void iwl4965_rx_reply_tx(struct iwl_priv *priv,
1776 struct iwl_rx_mem_buffer *rxb)
1777 {
1778 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1779 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
1780 int txq_id = SEQ_TO_QUEUE(sequence);
1781 int index = SEQ_TO_INDEX(sequence);
1782 struct iwl_tx_queue *txq = &priv->txq[txq_id];
1783 struct ieee80211_hdr *hdr;
1784 struct ieee80211_tx_info *info;
1785 struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
1786 u32 status = le32_to_cpu(tx_resp->u.status);
1787 int uninitialized_var(tid);
1788 int sta_id;
1789 int freed;
1790 u8 *qc = NULL;
1791 unsigned long flags;
1792
1793 if ((index >= txq->q.n_bd) || (iwl_legacy_queue_used(&txq->q, index) == 0)) {
1794 IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d "
1795 "is out of range [0-%d] %d %d\n", txq_id,
1796 index, txq->q.n_bd, txq->q.write_ptr,
1797 txq->q.read_ptr);
1798 return;
1799 }
1800
1801 txq->time_stamp = jiffies;
1802 info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb);
1803 memset(&info->status, 0, sizeof(info->status));
1804
1805 hdr = iwl_legacy_tx_queue_get_hdr(priv, txq_id, index);
1806 if (ieee80211_is_data_qos(hdr->frame_control)) {
1807 qc = ieee80211_get_qos_ctl(hdr);
1808 tid = qc[0] & 0xf;
1809 }
1810
1811 sta_id = iwl4965_get_ra_sta_id(priv, hdr);
1812 if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
1813 IWL_ERR(priv, "Station not known\n");
1814 return;
1815 }
1816
1817 spin_lock_irqsave(&priv->sta_lock, flags);
1818 if (txq->sched_retry) {
1819 const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
1820 struct iwl_ht_agg *agg = NULL;
1821 WARN_ON(!qc);
1822
1823 agg = &priv->stations[sta_id].tid[tid].agg;
1824
1825 iwl4965_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index);
1826
1827 /* check if BAR is needed */
1828 if ((tx_resp->frame_count == 1) && !iwl4965_is_tx_success(status))
1829 info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK;
1830
1831 if (txq->q.read_ptr != (scd_ssn & 0xff)) {
1832 index = iwl_legacy_queue_dec_wrap(scd_ssn & 0xff,
1833 txq->q.n_bd);
1834 IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim scd_ssn "
1835 "%d index %d\n", scd_ssn , index);
1836 freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
1837 if (qc)
1838 iwl4965_free_tfds_in_queue(priv, sta_id,
1839 tid, freed);
1840
1841 if (priv->mac80211_registered &&
1842 (iwl_legacy_queue_space(&txq->q) > txq->q.low_mark)
1843 && (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA))
1844 iwl_legacy_wake_queue(priv, txq);
1845 }
1846 } else {
1847 info->status.rates[0].count = tx_resp->failure_frame + 1;
1848 info->flags |= iwl4965_tx_status_to_mac80211(status);
1849 iwl4965_hwrate_to_tx_control(priv,
1850 le32_to_cpu(tx_resp->rate_n_flags),
1851 info);
1852
1853 IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) "
1854 "rate_n_flags 0x%x retries %d\n",
1855 txq_id,
1856 iwl4965_get_tx_fail_reason(status), status,
1857 le32_to_cpu(tx_resp->rate_n_flags),
1858 tx_resp->failure_frame);
1859
1860 freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
1861 if (qc && likely(sta_id != IWL_INVALID_STATION))
1862 iwl4965_free_tfds_in_queue(priv, sta_id, tid, freed);
1863 else if (sta_id == IWL_INVALID_STATION)
1864 IWL_DEBUG_TX_REPLY(priv, "Station not known\n");
1865
1866 if (priv->mac80211_registered &&
1867 (iwl_legacy_queue_space(&txq->q) > txq->q.low_mark))
1868 iwl_legacy_wake_queue(priv, txq);
1869 }
1870 if (qc && likely(sta_id != IWL_INVALID_STATION))
1871 iwl4965_txq_check_empty(priv, sta_id, tid, txq_id);
1872
1873 iwl4965_check_abort_status(priv, tx_resp->frame_count, status);
1874
1875 spin_unlock_irqrestore(&priv->sta_lock, flags);
1876 }
1877
1878 static void iwl4965_rx_beacon_notif(struct iwl_priv *priv,
1879 struct iwl_rx_mem_buffer *rxb)
1880 {
1881 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1882 struct iwl4965_beacon_notif *beacon = (void *)pkt->u.raw;
1883 u8 rate __maybe_unused =
1884 iwl4965_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
1885
1886 IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
1887 "tsf:0x%.8x%.8x rate:%d\n",
1888 le32_to_cpu(beacon->beacon_notify_hdr.u.status) & TX_STATUS_MSK,
1889 beacon->beacon_notify_hdr.failure_frame,
1890 le32_to_cpu(beacon->ibss_mgr_status),
1891 le32_to_cpu(beacon->high_tsf),
1892 le32_to_cpu(beacon->low_tsf), rate);
1893
1894 priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
1895 }
1896
1897 /* Set up 4965-specific Rx frame reply handlers */
1898 static void iwl4965_rx_handler_setup(struct iwl_priv *priv)
1899 {
1900 /* Legacy Rx frames */
1901 priv->rx_handlers[REPLY_RX] = iwl4965_rx_reply_rx;
1902 /* Tx response */
1903 priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
1904 priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
1905 }
1906
1907 static struct iwl_hcmd_ops iwl4965_hcmd = {
1908 .rxon_assoc = iwl4965_send_rxon_assoc,
1909 .commit_rxon = iwl4965_commit_rxon,
1910 .set_rxon_chain = iwl4965_set_rxon_chain,
1911 };
1912
1913 static void iwl4965_post_scan(struct iwl_priv *priv)
1914 {
1915 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1916
1917 /*
1918 * Since setting the RXON may have been deferred while
1919 * performing the scan, fire one off if needed
1920 */
1921 if (memcmp(&ctx->staging, &ctx->active, sizeof(ctx->staging)))
1922 iwl_legacy_commit_rxon(priv, ctx);
1923 }
1924
1925 static void iwl4965_post_associate(struct iwl_priv *priv)
1926 {
1927 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
1928 struct ieee80211_vif *vif = ctx->vif;
1929 struct ieee80211_conf *conf = NULL;
1930 int ret = 0;
1931
1932 if (!vif || !priv->is_open)
1933 return;
1934
1935 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
1936 return;
1937
1938 iwl_legacy_scan_cancel_timeout(priv, 200);
1939
1940 conf = iwl_legacy_ieee80211_get_hw_conf(priv->hw);
1941
1942 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
1943 iwl_legacy_commit_rxon(priv, ctx);
1944
1945 ret = iwl_legacy_send_rxon_timing(priv, ctx);
1946 if (ret)
1947 IWL_WARN(priv, "RXON timing - "
1948 "Attempting to continue.\n");
1949
1950 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
1951
1952 iwl_legacy_set_rxon_ht(priv, &priv->current_ht_config);
1953
1954 if (priv->cfg->ops->hcmd->set_rxon_chain)
1955 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
1956
1957 ctx->staging.assoc_id = cpu_to_le16(vif->bss_conf.aid);
1958
1959 IWL_DEBUG_ASSOC(priv, "assoc id %d beacon interval %d\n",
1960 vif->bss_conf.aid, vif->bss_conf.beacon_int);
1961
1962 if (vif->bss_conf.use_short_preamble)
1963 ctx->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
1964 else
1965 ctx->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
1966
1967 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
1968 if (vif->bss_conf.use_short_slot)
1969 ctx->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
1970 else
1971 ctx->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
1972 }
1973
1974 iwl_legacy_commit_rxon(priv, ctx);
1975
1976 IWL_DEBUG_ASSOC(priv, "Associated as %d to: %pM\n",
1977 vif->bss_conf.aid, ctx->active.bssid_addr);
1978
1979 switch (vif->type) {
1980 case NL80211_IFTYPE_STATION:
1981 break;
1982 case NL80211_IFTYPE_ADHOC:
1983 iwl4965_send_beacon_cmd(priv);
1984 break;
1985 default:
1986 IWL_ERR(priv, "%s Should not be called in %d mode\n",
1987 __func__, vif->type);
1988 break;
1989 }
1990
1991 /* the chain noise calibration will enabled PM upon completion
1992 * If chain noise has already been run, then we need to enable
1993 * power management here */
1994 if (priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE)
1995 iwl_legacy_power_update_mode(priv, false);
1996
1997 /* Enable Rx differential gain and sensitivity calibrations */
1998 iwl4965_chain_noise_reset(priv);
1999 priv->start_calib = 1;
2000 }
2001
2002 static void iwl4965_config_ap(struct iwl_priv *priv)
2003 {
2004 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
2005 struct ieee80211_vif *vif = ctx->vif;
2006 int ret = 0;
2007
2008 lockdep_assert_held(&priv->mutex);
2009
2010 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
2011 return;
2012
2013 /* The following should be done only at AP bring up */
2014 if (!iwl_legacy_is_associated_ctx(ctx)) {
2015
2016 /* RXON - unassoc (to set timing command) */
2017 ctx->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
2018 iwl_legacy_commit_rxon(priv, ctx);
2019
2020 /* RXON Timing */
2021 ret = iwl_legacy_send_rxon_timing(priv, ctx);
2022 if (ret)
2023 IWL_WARN(priv, "RXON timing failed - "
2024 "Attempting to continue.\n");
2025
2026 /* AP has all antennas */
2027 priv->chain_noise_data.active_chains =
2028 priv->hw_params.valid_rx_ant;
2029 iwl_legacy_set_rxon_ht(priv, &priv->current_ht_config);
2030 if (priv->cfg->ops->hcmd->set_rxon_chain)
2031 priv->cfg->ops->hcmd->set_rxon_chain(priv, ctx);
2032
2033 ctx->staging.assoc_id = 0;
2034
2035 if (vif->bss_conf.use_short_preamble)
2036 ctx->staging.flags |=
2037 RXON_FLG_SHORT_PREAMBLE_MSK;
2038 else
2039 ctx->staging.flags &=
2040 ~RXON_FLG_SHORT_PREAMBLE_MSK;
2041
2042 if (ctx->staging.flags & RXON_FLG_BAND_24G_MSK) {
2043 if (vif->bss_conf.use_short_slot)
2044 ctx->staging.flags |=
2045 RXON_FLG_SHORT_SLOT_MSK;
2046 else
2047 ctx->staging.flags &=
2048 ~RXON_FLG_SHORT_SLOT_MSK;
2049 }
2050 /* need to send beacon cmd before committing assoc RXON! */
2051 iwl4965_send_beacon_cmd(priv);
2052 /* restore RXON assoc */
2053 ctx->staging.filter_flags |= RXON_FILTER_ASSOC_MSK;
2054 iwl_legacy_commit_rxon(priv, ctx);
2055 }
2056 iwl4965_send_beacon_cmd(priv);
2057 }
2058
2059 static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
2060 .get_hcmd_size = iwl4965_get_hcmd_size,
2061 .build_addsta_hcmd = iwl4965_build_addsta_hcmd,
2062 .request_scan = iwl4965_request_scan,
2063 .post_scan = iwl4965_post_scan,
2064 };
2065
2066 static struct iwl_lib_ops iwl4965_lib = {
2067 .set_hw_params = iwl4965_hw_set_hw_params,
2068 .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl,
2069 .txq_attach_buf_to_tfd = iwl4965_hw_txq_attach_buf_to_tfd,
2070 .txq_free_tfd = iwl4965_hw_txq_free_tfd,
2071 .txq_init = iwl4965_hw_tx_queue_init,
2072 .rx_handler_setup = iwl4965_rx_handler_setup,
2073 .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr,
2074 .init_alive_start = iwl4965_init_alive_start,
2075 .load_ucode = iwl4965_load_bsm,
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 };
2107
2108 static const struct iwl_legacy_ops iwl4965_legacy_ops = {
2109 .post_associate = iwl4965_post_associate,
2110 .config_ap = iwl4965_config_ap,
2111 .manage_ibss_station = iwl4965_manage_ibss_station,
2112 .update_bcast_stations = iwl4965_update_bcast_stations,
2113 };
2114
2115 struct ieee80211_ops iwl4965_hw_ops = {
2116 .tx = iwl4965_mac_tx,
2117 .start = iwl4965_mac_start,
2118 .stop = iwl4965_mac_stop,
2119 .add_interface = iwl_legacy_mac_add_interface,
2120 .remove_interface = iwl_legacy_mac_remove_interface,
2121 .change_interface = iwl_legacy_mac_change_interface,
2122 .config = iwl_legacy_mac_config,
2123 .configure_filter = iwl4965_configure_filter,
2124 .set_key = iwl4965_mac_set_key,
2125 .update_tkip_key = iwl4965_mac_update_tkip_key,
2126 .conf_tx = iwl_legacy_mac_conf_tx,
2127 .reset_tsf = iwl_legacy_mac_reset_tsf,
2128 .bss_info_changed = iwl_legacy_mac_bss_info_changed,
2129 .ampdu_action = iwl4965_mac_ampdu_action,
2130 .hw_scan = iwl_legacy_mac_hw_scan,
2131 .sta_add = iwl4965_mac_sta_add,
2132 .sta_remove = iwl_legacy_mac_sta_remove,
2133 .channel_switch = iwl4965_mac_channel_switch,
2134 .tx_last_beacon = iwl_legacy_mac_tx_last_beacon,
2135 };
2136
2137 static const struct iwl_ops iwl4965_ops = {
2138 .lib = &iwl4965_lib,
2139 .hcmd = &iwl4965_hcmd,
2140 .utils = &iwl4965_hcmd_utils,
2141 .led = &iwl4965_led_ops,
2142 .legacy = &iwl4965_legacy_ops,
2143 .ieee80211_ops = &iwl4965_hw_ops,
2144 };
2145
2146 static struct iwl_base_params iwl4965_base_params = {
2147 .eeprom_size = IWL4965_EEPROM_IMG_SIZE,
2148 .num_of_queues = IWL49_NUM_QUEUES,
2149 .num_of_ampdu_queues = IWL49_NUM_AMPDU_QUEUES,
2150 .pll_cfg_val = 0,
2151 .set_l0s = true,
2152 .use_bsm = true,
2153 .led_compensation = 61,
2154 .chain_noise_num_beacons = IWL4965_CAL_NUM_BEACONS,
2155 .wd_timeout = IWL_DEF_WD_TIMEOUT,
2156 .temperature_kelvin = true,
2157 .ucode_tracing = true,
2158 .sensitivity_calib_by_driver = true,
2159 .chain_noise_calib_by_driver = true,
2160 };
2161
2162 struct iwl_cfg iwl4965_cfg = {
2163 .name = "Intel(R) Wireless WiFi Link 4965AGN",
2164 .fw_name_pre = IWL4965_FW_PRE,
2165 .ucode_api_max = IWL4965_UCODE_API_MAX,
2166 .ucode_api_min = IWL4965_UCODE_API_MIN,
2167 .sku = IWL_SKU_A|IWL_SKU_G|IWL_SKU_N,
2168 .valid_tx_ant = ANT_AB,
2169 .valid_rx_ant = ANT_ABC,
2170 .eeprom_ver = EEPROM_4965_EEPROM_VERSION,
2171 .eeprom_calib_ver = EEPROM_4965_TX_POWER_VERSION,
2172 .ops = &iwl4965_ops,
2173 .mod_params = &iwl4965_mod_params,
2174 .base_params = &iwl4965_base_params,
2175 .led_mode = IWL_LED_BLINK,
2176 /*
2177 * Force use of chains B and C for scan RX on 5 GHz band
2178 * because the device has off-channel reception on chain A.
2179 */
2180 .scan_rx_antennas[IEEE80211_BAND_5GHZ] = ANT_BC,
2181 };
2182
2183 /* Module firmware */
2184 MODULE_FIRMWARE(IWL4965_MODULE_FIRMWARE(IWL4965_UCODE_API_MAX));
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