1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
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8 * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved.
10 * This program is free software; you can redistribute it and/or modify
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21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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28 * James P. Ketrenos <ipw2100-admin@linux.intel.com>
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62 *****************************************************************************/
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.
69 #ifndef __iwl_4965_hw_h__
70 #define __iwl_4965_hw_h__
75 #define IWL4965_EEPROM_IMG_SIZE 1024
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.
83 #define IWL_CMD_QUEUE_NUM 4
84 #define IWL_CMD_FIFO_NUM 4
85 #define IWL49_FIRST_AMPDU_QUEUE 7
88 #define IWL_CCK_RATES 4
89 #define IWL_OFDM_RATES 8
90 #define IWL_HT_RATES 16
91 #define IWL_MAX_RATES (IWL_CCK_RATES+IWL_OFDM_RATES+IWL_HT_RATES)
94 #define SHORT_SLOT_TIME 9
95 #define LONG_SLOT_TIME 20
98 #define IWL_RSSI_OFFSET 44
103 #define PCI_CFG_RETRY_TIMEOUT 0x041
104 #define PCI_CFG_POWER_SOURCE 0x0C8
105 #define PCI_REG_WUM8 0x0E8
106 #define PCI_CFG_LINK_CTRL 0x0F0
108 /* PCI register values */
109 #define PCI_CFG_LINK_CTRL_VAL_L0S_EN 0x01
110 #define PCI_CFG_LINK_CTRL_VAL_L1_EN 0x02
111 #define PCI_CFG_CMD_REG_INT_DIS_MSK 0x04
112 #define PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT (0x80000000)
115 #define IWL_NUM_SCAN_RATES (2)
117 #define IWL_DEFAULT_TX_RETRY 15
119 #define RX_QUEUE_SIZE 256
120 #define RX_QUEUE_MASK 255
121 #define RX_QUEUE_SIZE_LOG 8
123 #define TFD_TX_CMD_SLOTS 256
124 #define TFD_CMD_SLOTS 32
127 * RX related structures and functions
129 #define RX_FREE_BUFFERS 64
130 #define RX_LOW_WATERMARK 8
132 /* Size of one Rx buffer in host DRAM */
133 #define IWL_RX_BUF_SIZE_4K (4 * 1024)
134 #define IWL_RX_BUF_SIZE_8K (8 * 1024)
136 /* Sizes and addresses for instruction and data memory (SRAM) in
137 * 4965's embedded processor. Driver access is via HBUS_TARG_MEM_* regs. */
138 #define RTC_INST_LOWER_BOUND (0x000000)
139 #define IWL49_RTC_INST_UPPER_BOUND (0x018000)
141 #define RTC_DATA_LOWER_BOUND (0x800000)
142 #define IWL49_RTC_DATA_UPPER_BOUND (0x80A000)
144 #define IWL49_RTC_INST_SIZE (IWL49_RTC_INST_UPPER_BOUND - RTC_INST_LOWER_BOUND)
145 #define IWL49_RTC_DATA_SIZE (IWL49_RTC_DATA_UPPER_BOUND - RTC_DATA_LOWER_BOUND)
147 #define IWL_MAX_INST_SIZE IWL49_RTC_INST_SIZE
148 #define IWL_MAX_DATA_SIZE IWL49_RTC_DATA_SIZE
150 /* Size of uCode instruction memory in bootstrap state machine */
151 #define IWL_MAX_BSM_SIZE BSM_SRAM_SIZE
153 static inline int iwl4965_hw_valid_rtc_data_addr(u32 addr
)
155 return (addr
>= RTC_DATA_LOWER_BOUND
) &&
156 (addr
< IWL49_RTC_DATA_UPPER_BOUND
);
159 /********************* START TEMPERATURE *************************************/
162 * 4965 temperature calculation.
164 * The driver must calculate the device temperature before calculating
165 * a txpower setting (amplifier gain is temperature dependent). The
166 * calculation uses 4 measurements, 3 of which (R1, R2, R3) are calibration
167 * values used for the life of the driver, and one of which (R4) is the
168 * real-time temperature indicator.
170 * uCode provides all 4 values to the driver via the "initialize alive"
171 * notification (see struct iwl4965_init_alive_resp). After the runtime uCode
172 * image loads, uCode updates the R4 value via statistics notifications
173 * (see STATISTICS_NOTIFICATION), which occur after each received beacon
174 * when associated, or can be requested via REPLY_STATISTICS_CMD.
176 * NOTE: uCode provides the R4 value as a 23-bit signed value. Driver
177 * must sign-extend to 32 bits before applying formula below.
181 * degrees Kelvin = ((97 * 259 * (R4 - R2) / (R3 - R1)) / 100) + 8
183 * NOTE: The basic formula is 259 * (R4-R2) / (R3-R1). The 97/100 is
184 * an additional correction, which should be centered around 0 degrees
185 * Celsius (273 degrees Kelvin). The 8 (3 percent of 273) compensates for
186 * centering the 97/100 correction around 0 degrees K.
188 * Add 273 to Kelvin value to find degrees Celsius, for comparing current
189 * temperature with factory-measured temperatures when calculating txpower
192 #define TEMPERATURE_CALIB_KELVIN_OFFSET 8
193 #define TEMPERATURE_CALIB_A_VAL 259
195 /* Limit range of calculated temperature to be between these Kelvin values */
196 #define IWL_TX_POWER_TEMPERATURE_MIN (263)
197 #define IWL_TX_POWER_TEMPERATURE_MAX (410)
199 #define IWL_TX_POWER_TEMPERATURE_OUT_OF_RANGE(t) \
200 (((t) < IWL_TX_POWER_TEMPERATURE_MIN) || \
201 ((t) > IWL_TX_POWER_TEMPERATURE_MAX))
203 /********************* END TEMPERATURE ***************************************/
205 /********************* START TXPOWER *****************************************/
208 * 4965 txpower calculations rely on information from three sources:
211 * 2) "initialize" alive notification
212 * 3) statistics notifications
214 * EEPROM data consists of:
216 * 1) Regulatory information (max txpower and channel usage flags) is provided
217 * separately for each channel that can possibly supported by 4965.
218 * 40 MHz wide (.11n fat) channels are listed separately from 20 MHz
221 * See struct iwl4965_eeprom_channel for format, and struct iwl4965_eeprom
222 * for locations in EEPROM.
224 * 2) Factory txpower calibration information is provided separately for
225 * sub-bands of contiguous channels. 2.4GHz has just one sub-band,
226 * but 5 GHz has several sub-bands.
228 * In addition, per-band (2.4 and 5 Ghz) saturation txpowers are provided.
230 * See struct iwl4965_eeprom_calib_info (and the tree of structures
231 * contained within it) for format, and struct iwl4965_eeprom for
232 * locations in EEPROM.
234 * "Initialization alive" notification (see struct iwl4965_init_alive_resp)
237 * 1) Temperature calculation parameters.
239 * 2) Power supply voltage measurement.
241 * 3) Tx gain compensation to balance 2 transmitters for MIMO use.
243 * Statistics notifications deliver:
245 * 1) Current values for temperature param R4.
249 * To calculate a txpower setting for a given desired target txpower, channel,
250 * modulation bit rate, and transmitter chain (4965 has 2 transmitters to
251 * support MIMO and transmit diversity), driver must do the following:
253 * 1) Compare desired txpower vs. (EEPROM) regulatory limit for this channel.
254 * Do not exceed regulatory limit; reduce target txpower if necessary.
256 * If setting up txpowers for MIMO rates (rate indexes 8-15, 24-31),
257 * 2 transmitters will be used simultaneously; driver must reduce the
258 * regulatory limit by 3 dB (half-power) for each transmitter, so the
259 * combined total output of the 2 transmitters is within regulatory limits.
262 * 2) Compare target txpower vs. (EEPROM) saturation txpower *reduced by
263 * backoff for this bit rate*. Do not exceed (saturation - backoff[rate]);
264 * reduce target txpower if necessary.
266 * Backoff values below are in 1/2 dB units (equivalent to steps in
267 * txpower gain tables):
269 * OFDM 6 - 36 MBit: 10 steps (5 dB)
270 * OFDM 48 MBit: 15 steps (7.5 dB)
271 * OFDM 54 MBit: 17 steps (8.5 dB)
272 * OFDM 60 MBit: 20 steps (10 dB)
273 * CCK all rates: 10 steps (5 dB)
275 * Backoff values apply to saturation txpower on a per-transmitter basis;
276 * when using MIMO (2 transmitters), each transmitter uses the same
277 * saturation level provided in EEPROM, and the same backoff values;
278 * no reduction (such as with regulatory txpower limits) is required.
280 * Saturation and Backoff values apply equally to 20 Mhz (legacy) channel
281 * widths and 40 Mhz (.11n fat) channel widths; there is no separate
282 * factory measurement for fat channels.
284 * The result of this step is the final target txpower. The rest of
285 * the steps figure out the proper settings for the device to achieve
286 * that target txpower.
289 * 3) Determine (EEPROM) calibration sub band for the target channel, by
290 * comparing against first and last channels in each sub band
291 * (see struct iwl4965_eeprom_calib_subband_info).
294 * 4) Linearly interpolate (EEPROM) factory calibration measurement sets,
295 * referencing the 2 factory-measured (sample) channels within the sub band.
297 * Interpolation is based on difference between target channel's frequency
298 * and the sample channels' frequencies. Since channel numbers are based
299 * on frequency (5 MHz between each channel number), this is equivalent
300 * to interpolating based on channel number differences.
302 * Note that the sample channels may or may not be the channels at the
303 * edges of the sub band. The target channel may be "outside" of the
304 * span of the sampled channels.
306 * Driver may choose the pair (for 2 Tx chains) of measurements (see
307 * struct iwl4965_eeprom_calib_ch_info) for which the actual measured
308 * txpower comes closest to the desired txpower. Usually, though,
309 * the middle set of measurements is closest to the regulatory limits,
310 * and is therefore a good choice for all txpower calculations (this
311 * assumes that high accuracy is needed for maximizing legal txpower,
312 * while lower txpower configurations do not need as much accuracy).
314 * Driver should interpolate both members of the chosen measurement pair,
315 * i.e. for both Tx chains (radio transmitters), unless the driver knows
316 * that only one of the chains will be used (e.g. only one tx antenna
317 * connected, but this should be unusual). The rate scaling algorithm
318 * switches antennas to find best performance, so both Tx chains will
319 * be used (although only one at a time) even for non-MIMO transmissions.
321 * Driver should interpolate factory values for temperature, gain table
322 * index, and actual power. The power amplifier detector values are
323 * not used by the driver.
325 * Sanity check: If the target channel happens to be one of the sample
326 * channels, the results should agree with the sample channel's
330 * 5) Find difference between desired txpower and (interpolated)
331 * factory-measured txpower. Using (interpolated) factory gain table index
332 * (shown elsewhere) as a starting point, adjust this index lower to
333 * increase txpower, or higher to decrease txpower, until the target
334 * txpower is reached. Each step in the gain table is 1/2 dB.
336 * For example, if factory measured txpower is 16 dBm, and target txpower
337 * is 13 dBm, add 6 steps to the factory gain index to reduce txpower
341 * 6) Find difference between current device temperature and (interpolated)
342 * factory-measured temperature for sub-band. Factory values are in
343 * degrees Celsius. To calculate current temperature, see comments for
344 * "4965 temperature calculation".
346 * If current temperature is higher than factory temperature, driver must
347 * increase gain (lower gain table index), and vice verse.
349 * Temperature affects gain differently for different channels:
351 * 2.4 GHz all channels: 3.5 degrees per half-dB step
352 * 5 GHz channels 34-43: 4.5 degrees per half-dB step
353 * 5 GHz channels >= 44: 4.0 degrees per half-dB step
355 * NOTE: Temperature can increase rapidly when transmitting, especially
356 * with heavy traffic at high txpowers. Driver should update
357 * temperature calculations often under these conditions to
358 * maintain strong txpower in the face of rising temperature.
361 * 7) Find difference between current power supply voltage indicator
362 * (from "initialize alive") and factory-measured power supply voltage
363 * indicator (EEPROM).
365 * If the current voltage is higher (indicator is lower) than factory
366 * voltage, gain should be reduced (gain table index increased) by:
368 * (eeprom - current) / 7
370 * If the current voltage is lower (indicator is higher) than factory
371 * voltage, gain should be increased (gain table index decreased) by:
373 * 2 * (current - eeprom) / 7
375 * If number of index steps in either direction turns out to be > 2,
376 * something is wrong ... just use 0.
378 * NOTE: Voltage compensation is independent of band/channel.
380 * NOTE: "Initialize" uCode measures current voltage, which is assumed
381 * to be constant after this initial measurement. Voltage
382 * compensation for txpower (number of steps in gain table)
383 * may be calculated once and used until the next uCode bootload.
386 * 8) If setting up txpowers for MIMO rates (rate indexes 8-15, 24-31),
387 * adjust txpower for each transmitter chain, so txpower is balanced
388 * between the two chains. There are 5 pairs of tx_atten[group][chain]
389 * values in "initialize alive", one pair for each of 5 channel ranges:
391 * Group 0: 5 GHz channel 34-43
392 * Group 1: 5 GHz channel 44-70
393 * Group 2: 5 GHz channel 71-124
394 * Group 3: 5 GHz channel 125-200
395 * Group 4: 2.4 GHz all channels
397 * Add the tx_atten[group][chain] value to the index for the target chain.
398 * The values are signed, but are in pairs of 0 and a non-negative number,
399 * so as to reduce gain (if necessary) of the "hotter" channel. This
400 * avoids any need to double-check for regulatory compliance after
404 * 9) If setting up for a CCK rate, lower the gain by adding a CCK compensation
405 * value to the index:
407 * Hardware rev B: 9 steps (4.5 dB)
408 * Hardware rev C: 5 steps (2.5 dB)
410 * Hardware rev for 4965 can be determined by reading CSR_HW_REV_WA_REG,
411 * bits [3:2], 1 = B, 2 = C.
413 * NOTE: This compensation is in addition to any saturation backoff that
414 * might have been applied in an earlier step.
417 * 10) Select the gain table, based on band (2.4 vs 5 GHz).
419 * Limit the adjusted index to stay within the table!
422 * 11) Read gain table entries for DSP and radio gain, place into appropriate
423 * location(s) in command (struct iwl4965_txpowertable_cmd).
426 /* Limit range of txpower output target to be between these values */
427 #define IWL_TX_POWER_TARGET_POWER_MIN (0) /* 0 dBm = 1 milliwatt */
428 #define IWL_TX_POWER_TARGET_POWER_MAX (16) /* 16 dBm */
431 * When MIMO is used (2 transmitters operating simultaneously), driver should
432 * limit each transmitter to deliver a max of 3 dB below the regulatory limit
433 * for the device. That is, use half power for each transmitter, so total
434 * txpower is within regulatory limits.
436 * The value "6" represents number of steps in gain table to reduce power 3 dB.
437 * Each step is 1/2 dB.
439 #define IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION (6)
442 * CCK gain compensation.
444 * When calculating txpowers for CCK, after making sure that the target power
445 * is within regulatory and saturation limits, driver must additionally
446 * back off gain by adding these values to the gain table index.
448 * Hardware rev for 4965 can be determined by reading CSR_HW_REV_WA_REG,
449 * bits [3:2], 1 = B, 2 = C.
451 #define IWL_TX_POWER_CCK_COMPENSATION_B_STEP (9)
452 #define IWL_TX_POWER_CCK_COMPENSATION_C_STEP (5)
455 * 4965 power supply voltage compensation for txpower
457 #define TX_POWER_IWL_VOLTAGE_CODES_PER_03V (7)
462 * The following tables contain pair of values for setting txpower, i.e.
463 * gain settings for the output of the device's digital signal processor (DSP),
464 * and for the analog gain structure of the transmitter.
466 * Each entry in the gain tables represents a step of 1/2 dB. Note that these
467 * are *relative* steps, not indications of absolute output power. Output
468 * power varies with temperature, voltage, and channel frequency, and also
469 * requires consideration of average power (to satisfy regulatory constraints),
470 * and peak power (to avoid distortion of the output signal).
472 * Each entry contains two values:
473 * 1) DSP gain (or sometimes called DSP attenuation). This is a fine-grained
474 * linear value that multiplies the output of the digital signal processor,
475 * before being sent to the analog radio.
476 * 2) Radio gain. This sets the analog gain of the radio Tx path.
477 * It is a coarser setting, and behaves in a logarithmic (dB) fashion.
479 * EEPROM contains factory calibration data for txpower. This maps actual
480 * measured txpower levels to gain settings in the "well known" tables
481 * below ("well-known" means here that both factory calibration *and* the
482 * driver work with the same table).
484 * There are separate tables for 2.4 GHz and 5 GHz bands. The 5 GHz table
485 * has an extension (into negative indexes), in case the driver needs to
486 * boost power setting for high device temperatures (higher than would be
487 * present during factory calibration). A 5 Ghz EEPROM index of "40"
488 * corresponds to the 49th entry in the table used by the driver.
490 #define MIN_TX_GAIN_INDEX (0) /* highest gain, lowest idx, 2.4 */
491 #define MIN_TX_GAIN_INDEX_52GHZ_EXT (-9) /* highest gain, lowest idx, 5 */
496 * Index Dsp gain Radio gain
497 * 0 110 0x3f (highest gain)
601 * Index Dsp gain Radio gain
602 * -9 123 0x3F (highest gain)
714 * Sanity checks and default values for EEPROM regulatory levels.
715 * If EEPROM values fall outside MIN/MAX range, use default values.
717 * Regulatory limits refer to the maximum average txpower allowed by
718 * regulatory agencies in the geographies in which the device is meant
719 * to be operated. These limits are SKU-specific (i.e. geography-specific),
720 * and channel-specific; each channel has an individual regulatory limit
721 * listed in the EEPROM.
723 * Units are in half-dBm (i.e. "34" means 17 dBm).
725 #define IWL_TX_POWER_DEFAULT_REGULATORY_24 (34)
726 #define IWL_TX_POWER_DEFAULT_REGULATORY_52 (34)
727 #define IWL_TX_POWER_REGULATORY_MIN (0)
728 #define IWL_TX_POWER_REGULATORY_MAX (34)
731 * Sanity checks and default values for EEPROM saturation levels.
732 * If EEPROM values fall outside MIN/MAX range, use default values.
734 * Saturation is the highest level that the output power amplifier can produce
735 * without significant clipping distortion. This is a "peak" power level.
736 * Different types of modulation (i.e. various "rates", and OFDM vs. CCK)
737 * require differing amounts of backoff, relative to their average power output,
738 * in order to avoid clipping distortion.
740 * Driver must make sure that it is violating neither the saturation limit,
741 * nor the regulatory limit, when calculating Tx power settings for various
744 * Units are in half-dBm (i.e. "38" means 19 dBm).
746 #define IWL_TX_POWER_DEFAULT_SATURATION_24 (38)
747 #define IWL_TX_POWER_DEFAULT_SATURATION_52 (38)
748 #define IWL_TX_POWER_SATURATION_MIN (20)
749 #define IWL_TX_POWER_SATURATION_MAX (50)
752 * Channel groups used for Tx Attenuation calibration (MIMO tx channel balance)
753 * and thermal Txpower calibration.
755 * When calculating txpower, driver must compensate for current device
756 * temperature; higher temperature requires higher gain. Driver must calculate
757 * current temperature (see "4965 temperature calculation"), then compare vs.
758 * factory calibration temperature in EEPROM; if current temperature is higher
759 * than factory temperature, driver must *increase* gain by proportions shown
760 * in table below. If current temperature is lower than factory, driver must
763 * Different frequency ranges require different compensation, as shown below.
765 /* Group 0, 5.2 GHz ch 34-43: 4.5 degrees per 1/2 dB. */
766 #define CALIB_IWL_TX_ATTEN_GR1_FCH 34
767 #define CALIB_IWL_TX_ATTEN_GR1_LCH 43
769 /* Group 1, 5.3 GHz ch 44-70: 4.0 degrees per 1/2 dB. */
770 #define CALIB_IWL_TX_ATTEN_GR2_FCH 44
771 #define CALIB_IWL_TX_ATTEN_GR2_LCH 70
773 /* Group 2, 5.5 GHz ch 71-124: 4.0 degrees per 1/2 dB. */
774 #define CALIB_IWL_TX_ATTEN_GR3_FCH 71
775 #define CALIB_IWL_TX_ATTEN_GR3_LCH 124
777 /* Group 3, 5.7 GHz ch 125-200: 4.0 degrees per 1/2 dB. */
778 #define CALIB_IWL_TX_ATTEN_GR4_FCH 125
779 #define CALIB_IWL_TX_ATTEN_GR4_LCH 200
781 /* Group 4, 2.4 GHz all channels: 3.5 degrees per 1/2 dB. */
782 #define CALIB_IWL_TX_ATTEN_GR5_FCH 1
783 #define CALIB_IWL_TX_ATTEN_GR5_LCH 20
786 CALIB_CH_GROUP_1
= 0,
787 CALIB_CH_GROUP_2
= 1,
788 CALIB_CH_GROUP_3
= 2,
789 CALIB_CH_GROUP_4
= 3,
790 CALIB_CH_GROUP_5
= 4,
794 /********************* END TXPOWER *****************************************/
800 * Most communication between driver and 4965 is via queues of data buffers.
801 * For example, all commands that the driver issues to device's embedded
802 * controller (uCode) are via the command queue (one of the Tx queues). All
803 * uCode command responses/replies/notifications, including Rx frames, are
804 * conveyed from uCode to driver via the Rx queue.
806 * Most support for these queues, including handshake support, resides in
807 * structures in host DRAM, shared between the driver and the device. When
808 * allocating this memory, the driver must make sure that data written by
809 * the host CPU updates DRAM immediately (and does not get "stuck" in CPU's
810 * cache memory), so DRAM and cache are consistent, and the device can
811 * immediately see changes made by the driver.
813 * 4965 supports up to 16 DRAM-based Tx queues, and services these queues via
814 * up to 7 DMA channels (FIFOs). Each Tx queue is supported by a circular array
815 * in DRAM containing 256 Transmit Frame Descriptors (TFDs).
817 #define IWL49_NUM_FIFOS 7
818 #define IWL49_CMD_FIFO_NUM 4
819 #define IWL49_NUM_QUEUES 16
820 #define IWL49_NUM_AMPDU_QUEUES 8
824 * struct iwl4965_schedq_bc_tbl
828 * Each Tx queue uses a byte-count table containing 320 entries:
829 * one 16-bit entry for each of 256 TFDs, plus an additional 64 entries that
830 * duplicate the first 64 entries (to avoid wrap-around within a Tx window;
831 * max Tx window is 64 TFDs).
833 * When driver sets up a new TFD, it must also enter the total byte count
834 * of the frame to be transmitted into the corresponding entry in the byte
835 * count table for the chosen Tx queue. If the TFD index is 0-63, the driver
836 * must duplicate the byte count entry in corresponding index 256-319.
838 * padding puts each byte count table on a 1024-byte boundary;
839 * 4965 assumes tables are separated by 1024 bytes.
841 struct iwl4965_scd_bc_tbl
{
842 __le16 tfd_offset
[TFD_QUEUE_BC_SIZE
];
843 u8 pad
[1024 - (TFD_QUEUE_BC_SIZE
) * sizeof(__le16
)];
844 } __attribute__ ((packed
));
846 #endif /* !__iwl_4965_hw_h__ */