| blob | b34322a32458196579b0e14f69b7028600a3b967 |
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2005 - 2009 Intel Corporation. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
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21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
25 * in the file called LICENSE.GPL.
26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
33 * Copyright(c) 2005 - 2009 Intel Corporation. All rights reserved.
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49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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62 *****************************************************************************/
63 /*
64 * Please use this file (iwl-4965-hw.h) only for hardware-related definitions.
65 * Use iwl-commands.h for uCode API definitions.
66 * Use iwl-dev.h for driver implementation definitions.
67 */
69 #ifndef __iwl_4965_hw_h__
70 #define __iwl_4965_hw_h__
74 /* EEPROM */
75 #define IWL4965_EEPROM_IMG_SIZE 1024
77 /*
78 * uCode queue management definitions ...
79 * Queue #4 is the command queue for 3945 and 4965; map it to Tx FIFO chnl 4.
80 * The first queue used for block-ack aggregation is #7 (4965 only).
81 * All block-ack aggregation queues should map to Tx DMA/FIFO channel 7.
82 */
83 #define IWL_CMD_QUEUE_NUM 4
84 #define IWL_CMD_FIFO_NUM 4
85 #define IWL49_FIRST_AMPDU_QUEUE 7
87 /* Time constants */
88 #define SHORT_SLOT_TIME 9
89 #define LONG_SLOT_TIME 20
91 /* RSSI to dBm */
92 #define IWL49_RSSI_OFFSET 44
95 /* PCI registers */
96 #define PCI_CFG_RETRY_TIMEOUT 0x041
98 /* PCI register values */
99 #define PCI_CFG_LINK_CTRL_VAL_L0S_EN 0x01
100 #define PCI_CFG_LINK_CTRL_VAL_L1_EN 0x02
102 #define IWL_NUM_SCAN_RATES (2)
104 #define IWL_DEFAULT_TX_RETRY 15
107 /* Sizes and addresses for instruction and data memory (SRAM) in
108 * 4965's embedded processor. Driver access is via HBUS_TARG_MEM_* regs. */
109 #define IWL49_RTC_INST_LOWER_BOUND (0x000000)
110 #define IWL49_RTC_INST_UPPER_BOUND (0x018000)
112 #define IWL49_RTC_DATA_LOWER_BOUND (0x800000)
113 #define IWL49_RTC_DATA_UPPER_BOUND (0x80A000)
115 #define IWL49_RTC_INST_SIZE (IWL49_RTC_INST_UPPER_BOUND - \
116 IWL49_RTC_INST_LOWER_BOUND)
117 #define IWL49_RTC_DATA_SIZE (IWL49_RTC_DATA_UPPER_BOUND - \
118 IWL49_RTC_DATA_LOWER_BOUND)
120 #define IWL49_MAX_INST_SIZE IWL49_RTC_INST_SIZE
121 #define IWL49_MAX_DATA_SIZE IWL49_RTC_DATA_SIZE
123 /* Size of uCode instruction memory in bootstrap state machine */
124 #define IWL49_MAX_BSM_SIZE BSM_SRAM_SIZE
127 {
130 }
132 /********************* START TEMPERATURE *************************************/
134 /**
135 * 4965 temperature calculation.
136 *
137 * The driver must calculate the device temperature before calculating
138 * a txpower setting (amplifier gain is temperature dependent). The
139 * calculation uses 4 measurements, 3 of which (R1, R2, R3) are calibration
140 * values used for the life of the driver, and one of which (R4) is the
141 * real-time temperature indicator.
142 *
143 * uCode provides all 4 values to the driver via the "initialize alive"
144 * notification (see struct iwl4965_init_alive_resp). After the runtime uCode
145 * image loads, uCode updates the R4 value via statistics notifications
146 * (see STATISTICS_NOTIFICATION), which occur after each received beacon
147 * when associated, or can be requested via REPLY_STATISTICS_CMD.
148 *
149 * NOTE: uCode provides the R4 value as a 23-bit signed value. Driver
150 * must sign-extend to 32 bits before applying formula below.
151 *
152 * Formula:
153 *
154 * degrees Kelvin = ((97 * 259 * (R4 - R2) / (R3 - R1)) / 100) + 8
155 *
156 * NOTE: The basic formula is 259 * (R4-R2) / (R3-R1). The 97/100 is
157 * an additional correction, which should be centered around 0 degrees
158 * Celsius (273 degrees Kelvin). The 8 (3 percent of 273) compensates for
159 * centering the 97/100 correction around 0 degrees K.
160 *
161 * Add 273 to Kelvin value to find degrees Celsius, for comparing current
162 * temperature with factory-measured temperatures when calculating txpower
163 * settings.
164 */
165 #define TEMPERATURE_CALIB_KELVIN_OFFSET 8
166 #define TEMPERATURE_CALIB_A_VAL 259
168 /* Limit range of calculated temperature to be between these Kelvin values */
169 #define IWL_TX_POWER_TEMPERATURE_MIN (263)
170 #define IWL_TX_POWER_TEMPERATURE_MAX (410)
172 #define IWL_TX_POWER_TEMPERATURE_OUT_OF_RANGE(t) \
173 (((t) < IWL_TX_POWER_TEMPERATURE_MIN) || \
174 ((t) > IWL_TX_POWER_TEMPERATURE_MAX))
176 /********************* END TEMPERATURE ***************************************/
178 /********************* START TXPOWER *****************************************/
180 /**
181 * 4965 txpower calculations rely on information from three sources:
182 *
183 * 1) EEPROM
184 * 2) "initialize" alive notification
185 * 3) statistics notifications
186 *
187 * EEPROM data consists of:
188 *
189 * 1) Regulatory information (max txpower and channel usage flags) is provided
190 * separately for each channel that can possibly supported by 4965.
191 * 40 MHz wide (.11n HT40) channels are listed separately from 20 MHz
192 * (legacy) channels.
193 *
194 * See struct iwl4965_eeprom_channel for format, and struct iwl4965_eeprom
195 * for locations in EEPROM.
196 *
197 * 2) Factory txpower calibration information is provided separately for
198 * sub-bands of contiguous channels. 2.4GHz has just one sub-band,
199 * but 5 GHz has several sub-bands.
200 *
201 * In addition, per-band (2.4 and 5 Ghz) saturation txpowers are provided.
202 *
203 * See struct iwl4965_eeprom_calib_info (and the tree of structures
204 * contained within it) for format, and struct iwl4965_eeprom for
205 * locations in EEPROM.
206 *
207 * "Initialization alive" notification (see struct iwl4965_init_alive_resp)
208 * consists of:
209 *
210 * 1) Temperature calculation parameters.
211 *
212 * 2) Power supply voltage measurement.
213 *
214 * 3) Tx gain compensation to balance 2 transmitters for MIMO use.
215 *
216 * Statistics notifications deliver:
217 *
218 * 1) Current values for temperature param R4.
219 */
221 /**
222 * To calculate a txpower setting for a given desired target txpower, channel,
223 * modulation bit rate, and transmitter chain (4965 has 2 transmitters to
224 * support MIMO and transmit diversity), driver must do the following:
225 *
226 * 1) Compare desired txpower vs. (EEPROM) regulatory limit for this channel.
227 * Do not exceed regulatory limit; reduce target txpower if necessary.
228 *
229 * If setting up txpowers for MIMO rates (rate indexes 8-15, 24-31),
230 * 2 transmitters will be used simultaneously; driver must reduce the
231 * regulatory limit by 3 dB (half-power) for each transmitter, so the
232 * combined total output of the 2 transmitters is within regulatory limits.
233 *
234 *
235 * 2) Compare target txpower vs. (EEPROM) saturation txpower *reduced by
236 * backoff for this bit rate*. Do not exceed (saturation - backoff[rate]);
237 * reduce target txpower if necessary.
238 *
239 * Backoff values below are in 1/2 dB units (equivalent to steps in
240 * txpower gain tables):
241 *
242 * OFDM 6 - 36 MBit: 10 steps (5 dB)
243 * OFDM 48 MBit: 15 steps (7.5 dB)
244 * OFDM 54 MBit: 17 steps (8.5 dB)
245 * OFDM 60 MBit: 20 steps (10 dB)
246 * CCK all rates: 10 steps (5 dB)
247 *
248 * Backoff values apply to saturation txpower on a per-transmitter basis;
249 * when using MIMO (2 transmitters), each transmitter uses the same
250 * saturation level provided in EEPROM, and the same backoff values;
251 * no reduction (such as with regulatory txpower limits) is required.
252 *
253 * Saturation and Backoff values apply equally to 20 Mhz (legacy) channel
254 * widths and 40 Mhz (.11n HT40) channel widths; there is no separate
255 * factory measurement for ht40 channels.
256 *
257 * The result of this step is the final target txpower. The rest of
258 * the steps figure out the proper settings for the device to achieve
259 * that target txpower.
260 *
261 *
262 * 3) Determine (EEPROM) calibration sub band for the target channel, by
263 * comparing against first and last channels in each sub band
264 * (see struct iwl4965_eeprom_calib_subband_info).
265 *
266 *
267 * 4) Linearly interpolate (EEPROM) factory calibration measurement sets,
268 * referencing the 2 factory-measured (sample) channels within the sub band.
269 *
270 * Interpolation is based on difference between target channel's frequency
271 * and the sample channels' frequencies. Since channel numbers are based
272 * on frequency (5 MHz between each channel number), this is equivalent
273 * to interpolating based on channel number differences.
274 *
275 * Note that the sample channels may or may not be the channels at the
276 * edges of the sub band. The target channel may be "outside" of the
277 * span of the sampled channels.
278 *
279 * Driver may choose the pair (for 2 Tx chains) of measurements (see
280 * struct iwl4965_eeprom_calib_ch_info) for which the actual measured
281 * txpower comes closest to the desired txpower. Usually, though,
282 * the middle set of measurements is closest to the regulatory limits,
283 * and is therefore a good choice for all txpower calculations (this
284 * assumes that high accuracy is needed for maximizing legal txpower,
285 * while lower txpower configurations do not need as much accuracy).
286 *
287 * Driver should interpolate both members of the chosen measurement pair,
288 * i.e. for both Tx chains (radio transmitters), unless the driver knows
289 * that only one of the chains will be used (e.g. only one tx antenna
290 * connected, but this should be unusual). The rate scaling algorithm
291 * switches antennas to find best performance, so both Tx chains will
292 * be used (although only one at a time) even for non-MIMO transmissions.
293 *
294 * Driver should interpolate factory values for temperature, gain table
295 * index, and actual power. The power amplifier detector values are
296 * not used by the driver.
297 *
298 * Sanity check: If the target channel happens to be one of the sample
299 * channels, the results should agree with the sample channel's
300 * measurements!
301 *
302 *
303 * 5) Find difference between desired txpower and (interpolated)
304 * factory-measured txpower. Using (interpolated) factory gain table index
305 * (shown elsewhere) as a starting point, adjust this index lower to
306 * increase txpower, or higher to decrease txpower, until the target
307 * txpower is reached. Each step in the gain table is 1/2 dB.
308 *
309 * For example, if factory measured txpower is 16 dBm, and target txpower
310 * is 13 dBm, add 6 steps to the factory gain index to reduce txpower
311 * by 3 dB.
312 *
313 *
314 * 6) Find difference between current device temperature and (interpolated)
315 * factory-measured temperature for sub-band. Factory values are in
316 * degrees Celsius. To calculate current temperature, see comments for
317 * "4965 temperature calculation".
318 *
319 * If current temperature is higher than factory temperature, driver must
320 * increase gain (lower gain table index), and vice verse.
321 *
322 * Temperature affects gain differently for different channels:
323 *
324 * 2.4 GHz all channels: 3.5 degrees per half-dB step
325 * 5 GHz channels 34-43: 4.5 degrees per half-dB step
326 * 5 GHz channels >= 44: 4.0 degrees per half-dB step
327 *
328 * NOTE: Temperature can increase rapidly when transmitting, especially
329 * with heavy traffic at high txpowers. Driver should update
330 * temperature calculations often under these conditions to
331 * maintain strong txpower in the face of rising temperature.
332 *
333 *
334 * 7) Find difference between current power supply voltage indicator
335 * (from "initialize alive") and factory-measured power supply voltage
336 * indicator (EEPROM).
337 *
338 * If the current voltage is higher (indicator is lower) than factory
339 * voltage, gain should be reduced (gain table index increased) by:
340 *
341 * (eeprom - current) / 7
342 *
343 * If the current voltage is lower (indicator is higher) than factory
344 * voltage, gain should be increased (gain table index decreased) by:
345 *
346 * 2 * (current - eeprom) / 7
347 *
348 * If number of index steps in either direction turns out to be > 2,
349 * something is wrong ... just use 0.
350 *
351 * NOTE: Voltage compensation is independent of band/channel.
352 *
353 * NOTE: "Initialize" uCode measures current voltage, which is assumed
354 * to be constant after this initial measurement. Voltage
355 * compensation for txpower (number of steps in gain table)
356 * may be calculated once and used until the next uCode bootload.
357 *
358 *
359 * 8) If setting up txpowers for MIMO rates (rate indexes 8-15, 24-31),
360 * adjust txpower for each transmitter chain, so txpower is balanced
361 * between the two chains. There are 5 pairs of tx_atten[group][chain]
362 * values in "initialize alive", one pair for each of 5 channel ranges:
363 *
364 * Group 0: 5 GHz channel 34-43
365 * Group 1: 5 GHz channel 44-70
366 * Group 2: 5 GHz channel 71-124
367 * Group 3: 5 GHz channel 125-200
368 * Group 4: 2.4 GHz all channels
369 *
370 * Add the tx_atten[group][chain] value to the index for the target chain.
371 * The values are signed, but are in pairs of 0 and a non-negative number,
372 * so as to reduce gain (if necessary) of the "hotter" channel. This
373 * avoids any need to double-check for regulatory compliance after
374 * this step.
375 *
376 *
377 * 9) If setting up for a CCK rate, lower the gain by adding a CCK compensation
378 * value to the index:
379 *
380 * Hardware rev B: 9 steps (4.5 dB)
381 * Hardware rev C: 5 steps (2.5 dB)
382 *
383 * Hardware rev for 4965 can be determined by reading CSR_HW_REV_WA_REG,
384 * bits [3:2], 1 = B, 2 = C.
385 *
386 * NOTE: This compensation is in addition to any saturation backoff that
387 * might have been applied in an earlier step.
388 *
389 *
390 * 10) Select the gain table, based on band (2.4 vs 5 GHz).
391 *
392 * Limit the adjusted index to stay within the table!
393 *
394 *
395 * 11) Read gain table entries for DSP and radio gain, place into appropriate
396 * location(s) in command (struct iwl4965_txpowertable_cmd).
397 */
399 /* Limit range of txpower output target to be between these values */
403 /**
404 * When MIMO is used (2 transmitters operating simultaneously), driver should
405 * limit each transmitter to deliver a max of 3 dB below the regulatory limit
406 * for the device. That is, use half power for each transmitter, so total
407 * txpower is within regulatory limits.
408 *
409 * The value "6" represents number of steps in gain table to reduce power 3 dB.
410 * Each step is 1/2 dB.
411 */
412 #define IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION (6)
414 /**
415 * CCK gain compensation.
416 *
417 * When calculating txpowers for CCK, after making sure that the target power
418 * is within regulatory and saturation limits, driver must additionally
419 * back off gain by adding these values to the gain table index.
420 *
421 * Hardware rev for 4965 can be determined by reading CSR_HW_REV_WA_REG,
422 * bits [3:2], 1 = B, 2 = C.
423 */
424 #define IWL_TX_POWER_CCK_COMPENSATION_B_STEP (9)
425 #define IWL_TX_POWER_CCK_COMPENSATION_C_STEP (5)
427 /*
428 * 4965 power supply voltage compensation for txpower
429 */
430 #define TX_POWER_IWL_VOLTAGE_CODES_PER_03V (7)
432 /**
433 * Gain tables.
434 *
435 * The following tables contain pair of values for setting txpower, i.e.
436 * gain settings for the output of the device's digital signal processor (DSP),
437 * and for the analog gain structure of the transmitter.
438 *
439 * Each entry in the gain tables represents a step of 1/2 dB. Note that these
440 * are *relative* steps, not indications of absolute output power. Output
441 * power varies with temperature, voltage, and channel frequency, and also
442 * requires consideration of average power (to satisfy regulatory constraints),
443 * and peak power (to avoid distortion of the output signal).
444 *
445 * Each entry contains two values:
446 * 1) DSP gain (or sometimes called DSP attenuation). This is a fine-grained
447 * linear value that multiplies the output of the digital signal processor,
448 * before being sent to the analog radio.
449 * 2) Radio gain. This sets the analog gain of the radio Tx path.
450 * It is a coarser setting, and behaves in a logarithmic (dB) fashion.
451 *
452 * EEPROM contains factory calibration data for txpower. This maps actual
453 * measured txpower levels to gain settings in the "well known" tables
454 * below ("well-known" means here that both factory calibration *and* the
455 * driver work with the same table).
456 *
457 * There are separate tables for 2.4 GHz and 5 GHz bands. The 5 GHz table
458 * has an extension (into negative indexes), in case the driver needs to
459 * boost power setting for high device temperatures (higher than would be
460 * present during factory calibration). A 5 Ghz EEPROM index of "40"
461 * corresponds to the 49th entry in the table used by the driver.
462 */
466 /**
467 * 2.4 GHz gain table
468 *
469 * Index Dsp gain Radio gain
470 * 0 110 0x3f (highest gain)
471 * 1 104 0x3f
472 * 2 98 0x3f
473 * 3 110 0x3e
474 * 4 104 0x3e
475 * 5 98 0x3e
476 * 6 110 0x3d
477 * 7 104 0x3d
478 * 8 98 0x3d
479 * 9 110 0x3c
480 * 10 104 0x3c
481 * 11 98 0x3c
482 * 12 110 0x3b
483 * 13 104 0x3b
484 * 14 98 0x3b
485 * 15 110 0x3a
486 * 16 104 0x3a
487 * 17 98 0x3a
488 * 18 110 0x39
489 * 19 104 0x39
490 * 20 98 0x39
491 * 21 110 0x38
492 * 22 104 0x38
493 * 23 98 0x38
494 * 24 110 0x37
495 * 25 104 0x37
496 * 26 98 0x37
497 * 27 110 0x36
498 * 28 104 0x36
499 * 29 98 0x36
500 * 30 110 0x35
501 * 31 104 0x35
502 * 32 98 0x35
503 * 33 110 0x34
504 * 34 104 0x34
505 * 35 98 0x34
506 * 36 110 0x33
507 * 37 104 0x33
508 * 38 98 0x33
509 * 39 110 0x32
510 * 40 104 0x32
511 * 41 98 0x32
512 * 42 110 0x31
513 * 43 104 0x31
514 * 44 98 0x31
515 * 45 110 0x30
516 * 46 104 0x30
517 * 47 98 0x30
518 * 48 110 0x6
519 * 49 104 0x6
520 * 50 98 0x6
521 * 51 110 0x5
522 * 52 104 0x5
523 * 53 98 0x5
524 * 54 110 0x4
525 * 55 104 0x4
526 * 56 98 0x4
527 * 57 110 0x3
528 * 58 104 0x3
529 * 59 98 0x3
530 * 60 110 0x2
531 * 61 104 0x2
532 * 62 98 0x2
533 * 63 110 0x1
534 * 64 104 0x1
535 * 65 98 0x1
536 * 66 110 0x0
537 * 67 104 0x0
538 * 68 98 0x0
539 * 69 97 0
540 * 70 96 0
541 * 71 95 0
542 * 72 94 0
543 * 73 93 0
544 * 74 92 0
545 * 75 91 0
546 * 76 90 0
547 * 77 89 0
548 * 78 88 0
549 * 79 87 0
550 * 80 86 0
551 * 81 85 0
552 * 82 84 0
553 * 83 83 0
554 * 84 82 0
555 * 85 81 0
556 * 86 80 0
557 * 87 79 0
558 * 88 78 0
559 * 89 77 0
560 * 90 76 0
561 * 91 75 0
562 * 92 74 0
563 * 93 73 0
564 * 94 72 0
565 * 95 71 0
566 * 96 70 0
567 * 97 69 0
568 * 98 68 0
569 */
571 /**
572 * 5 GHz gain table
573 *
574 * Index Dsp gain Radio gain
575 * -9 123 0x3F (highest gain)
576 * -8 117 0x3F
577 * -7 110 0x3F
578 * -6 104 0x3F
579 * -5 98 0x3F
580 * -4 110 0x3E
581 * -3 104 0x3E
582 * -2 98 0x3E
583 * -1 110 0x3D
584 * 0 104 0x3D
585 * 1 98 0x3D
586 * 2 110 0x3C
587 * 3 104 0x3C
588 * 4 98 0x3C
589 * 5 110 0x3B
590 * 6 104 0x3B
591 * 7 98 0x3B
592 * 8 110 0x3A
593 * 9 104 0x3A
594 * 10 98 0x3A
595 * 11 110 0x39
596 * 12 104 0x39
597 * 13 98 0x39
598 * 14 110 0x38
599 * 15 104 0x38
600 * 16 98 0x38
601 * 17 110 0x37
602 * 18 104 0x37
603 * 19 98 0x37
604 * 20 110 0x36
605 * 21 104 0x36
606 * 22 98 0x36
607 * 23 110 0x35
608 * 24 104 0x35
609 * 25 98 0x35
610 * 26 110 0x34
611 * 27 104 0x34
612 * 28 98 0x34
613 * 29 110 0x33
614 * 30 104 0x33
615 * 31 98 0x33
616 * 32 110 0x32
617 * 33 104 0x32
618 * 34 98 0x32
619 * 35 110 0x31
620 * 36 104 0x31
621 * 37 98 0x31
622 * 38 110 0x30
623 * 39 104 0x30
624 * 40 98 0x30
625 * 41 110 0x25
626 * 42 104 0x25
627 * 43 98 0x25
628 * 44 110 0x24
629 * 45 104 0x24
630 * 46 98 0x24
631 * 47 110 0x23
632 * 48 104 0x23
633 * 49 98 0x23
634 * 50 110 0x22
635 * 51 104 0x18
636 * 52 98 0x18
637 * 53 110 0x17
638 * 54 104 0x17
639 * 55 98 0x17
640 * 56 110 0x16
641 * 57 104 0x16
642 * 58 98 0x16
643 * 59 110 0x15
644 * 60 104 0x15
645 * 61 98 0x15
646 * 62 110 0x14
647 * 63 104 0x14
648 * 64 98 0x14
649 * 65 110 0x13
650 * 66 104 0x13
651 * 67 98 0x13
652 * 68 110 0x12
653 * 69 104 0x08
654 * 70 98 0x08
655 * 71 110 0x07
656 * 72 104 0x07
657 * 73 98 0x07
658 * 74 110 0x06
659 * 75 104 0x06
660 * 76 98 0x06
661 * 77 110 0x05
662 * 78 104 0x05
663 * 79 98 0x05
664 * 80 110 0x04
665 * 81 104 0x04
666 * 82 98 0x04
667 * 83 110 0x03
668 * 84 104 0x03
669 * 85 98 0x03
670 * 86 110 0x02
671 * 87 104 0x02
672 * 88 98 0x02
673 * 89 110 0x01
674 * 90 104 0x01
675 * 91 98 0x01
676 * 92 110 0x00
677 * 93 104 0x00
678 * 94 98 0x00
679 * 95 93 0x00
680 * 96 88 0x00
681 * 97 83 0x00
682 * 98 78 0x00
683 */
686 /**
687 * Sanity checks and default values for EEPROM regulatory levels.
688 * If EEPROM values fall outside MIN/MAX range, use default values.
689 *
690 * Regulatory limits refer to the maximum average txpower allowed by
691 * regulatory agencies in the geographies in which the device is meant
692 * to be operated. These limits are SKU-specific (i.e. geography-specific),
693 * and channel-specific; each channel has an individual regulatory limit
694 * listed in the EEPROM.
695 *
696 * Units are in half-dBm (i.e. "34" means 17 dBm).
697 */
698 #define IWL_TX_POWER_DEFAULT_REGULATORY_24 (34)
699 #define IWL_TX_POWER_DEFAULT_REGULATORY_52 (34)
700 #define IWL_TX_POWER_REGULATORY_MIN (0)
701 #define IWL_TX_POWER_REGULATORY_MAX (34)
703 /**
704 * Sanity checks and default values for EEPROM saturation levels.
705 * If EEPROM values fall outside MIN/MAX range, use default values.
706 *
707 * Saturation is the highest level that the output power amplifier can produce
708 * without significant clipping distortion. This is a "peak" power level.
709 * Different types of modulation (i.e. various "rates", and OFDM vs. CCK)
710 * require differing amounts of backoff, relative to their average power output,
711 * in order to avoid clipping distortion.
712 *
713 * Driver must make sure that it is violating neither the saturation limit,
714 * nor the regulatory limit, when calculating Tx power settings for various
715 * rates.
716 *
717 * Units are in half-dBm (i.e. "38" means 19 dBm).
718 */
719 #define IWL_TX_POWER_DEFAULT_SATURATION_24 (38)
720 #define IWL_TX_POWER_DEFAULT_SATURATION_52 (38)
721 #define IWL_TX_POWER_SATURATION_MIN (20)
722 #define IWL_TX_POWER_SATURATION_MAX (50)
724 /**
725 * Channel groups used for Tx Attenuation calibration (MIMO tx channel balance)
726 * and thermal Txpower calibration.
727 *
728 * When calculating txpower, driver must compensate for current device
729 * temperature; higher temperature requires higher gain. Driver must calculate
730 * current temperature (see "4965 temperature calculation"), then compare vs.
731 * factory calibration temperature in EEPROM; if current temperature is higher
732 * than factory temperature, driver must *increase* gain by proportions shown
733 * in table below. If current temperature is lower than factory, driver must
734 * *decrease* gain.
735 *
736 * Different frequency ranges require different compensation, as shown below.
737 */
738 /* Group 0, 5.2 GHz ch 34-43: 4.5 degrees per 1/2 dB. */
739 #define CALIB_IWL_TX_ATTEN_GR1_FCH 34
740 #define CALIB_IWL_TX_ATTEN_GR1_LCH 43
742 /* Group 1, 5.3 GHz ch 44-70: 4.0 degrees per 1/2 dB. */
743 #define CALIB_IWL_TX_ATTEN_GR2_FCH 44
744 #define CALIB_IWL_TX_ATTEN_GR2_LCH 70
746 /* Group 2, 5.5 GHz ch 71-124: 4.0 degrees per 1/2 dB. */
747 #define CALIB_IWL_TX_ATTEN_GR3_FCH 71
748 #define CALIB_IWL_TX_ATTEN_GR3_LCH 124
750 /* Group 3, 5.7 GHz ch 125-200: 4.0 degrees per 1/2 dB. */
751 #define CALIB_IWL_TX_ATTEN_GR4_FCH 125
752 #define CALIB_IWL_TX_ATTEN_GR4_LCH 200
754 /* Group 4, 2.4 GHz all channels: 3.5 degrees per 1/2 dB. */
755 #define CALIB_IWL_TX_ATTEN_GR5_FCH 1
756 #define CALIB_IWL_TX_ATTEN_GR5_LCH 20
764 CALIB_CH_GROUP_MAX
765 };
767 /********************* END TXPOWER *****************************************/
770 /**
771 * Tx/Rx Queues
772 *
773 * Most communication between driver and 4965 is via queues of data buffers.
774 * For example, all commands that the driver issues to device's embedded
775 * controller (uCode) are via the command queue (one of the Tx queues). All
776 * uCode command responses/replies/notifications, including Rx frames, are
777 * conveyed from uCode to driver via the Rx queue.
778 *
779 * Most support for these queues, including handshake support, resides in
780 * structures in host DRAM, shared between the driver and the device. When
781 * allocating this memory, the driver must make sure that data written by
782 * the host CPU updates DRAM immediately (and does not get "stuck" in CPU's
783 * cache memory), so DRAM and cache are consistent, and the device can
784 * immediately see changes made by the driver.
785 *
786 * 4965 supports up to 16 DRAM-based Tx queues, and services these queues via
787 * up to 7 DMA channels (FIFOs). Each Tx queue is supported by a circular array
788 * in DRAM containing 256 Transmit Frame Descriptors (TFDs).
789 */
790 #define IWL49_NUM_FIFOS 7
791 #define IWL49_CMD_FIFO_NUM 4
792 #define IWL49_NUM_QUEUES 16
793 #define IWL49_NUM_AMPDU_QUEUES 8
796 /**
797 * struct iwl4965_schedq_bc_tbl
798 *
799 * Byte Count table
800 *
801 * Each Tx queue uses a byte-count table containing 320 entries:
802 * one 16-bit entry for each of 256 TFDs, plus an additional 64 entries that
803 * duplicate the first 64 entries (to avoid wrap-around within a Tx window;
804 * max Tx window is 64 TFDs).
805 *
806 * When driver sets up a new TFD, it must also enter the total byte count
807 * of the frame to be transmitted into the corresponding entry in the byte
808 * count table for the chosen Tx queue. If the TFD index is 0-63, the driver
809 * must duplicate the byte count entry in corresponding index 256-319.
810 *
811 * padding puts each byte count table on a 1024-byte boundary;
812 * 4965 assumes tables are separated by 1024 bytes.
813 */