2011-02-21 11:11:05 -08:00
/******************************************************************************
*
* This file is provided under a dual BSD / GPLv2 license . When using or
* redistributing this file , you may do so under either license .
*
* GPL LICENSE SUMMARY
*
2011-02-21 11:27:26 -08:00
* Copyright ( c ) 2005 - 2011 Intel Corporation . All rights reserved .
2011-02-21 11:11:05 -08:00
*
* This program is free software ; you can redistribute it and / or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation .
*
* This program is distributed in the hope that it will be useful , but
* WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
* General Public License for more details .
*
* You should have received a copy of the GNU General Public License
* along with this program ; if not , write to the Free Software
* Foundation , Inc . , 51 Franklin Street , Fifth Floor , Boston , MA 02110 ,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called LICENSE . GPL .
*
* Contact Information :
* Intel Linux Wireless < ilw @ linux . intel . com >
* Intel Corporation , 5200 N . E . Elam Young Parkway , Hillsboro , OR 97124 - 6497
*
* BSD LICENSE
*
2011-02-21 11:27:26 -08:00
* Copyright ( c ) 2005 - 2011 Intel Corporation . All rights reserved .
2011-02-21 11:11:05 -08:00
* All rights reserved .
*
* Redistribution and use in source and binary forms , with or without
* modification , are permitted provided that the following conditions
* are met :
*
* * Redistributions of source code must retain the above copyright
* notice , this list of conditions and the following disclaimer .
* * Redistributions in binary form must reproduce the above copyright
* notice , this list of conditions and the following disclaimer in
* the documentation and / or other materials provided with the
* distribution .
* * Neither the name Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission .
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* " AS IS " AND ANY EXPRESS OR IMPLIED WARRANTIES , INCLUDING , BUT NOT
* LIMITED TO , THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* THEORY OF LIABILITY , WHETHER IN CONTRACT , STRICT LIABILITY , OR TORT
* ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE , EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE .
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Please use this file ( iwl - 4965 - hw . h ) only for hardware - related definitions .
* Use iwl - commands . h for uCode API definitions .
* Use iwl - dev . h for driver implementation definitions .
*/
# ifndef __iwl_4965_hw_h__
# define __iwl_4965_hw_h__
# include "iwl-fh.h"
/* EEPROM */
# define IWL4965_EEPROM_IMG_SIZE 1024
/*
* uCode queue management definitions . . .
* The first queue used for block - ack aggregation is # 7 ( 4965 only ) .
* All block - ack aggregation queues should map to Tx DMA / FIFO channel 7.
*/
# define IWL49_FIRST_AMPDU_QUEUE 7
/* Sizes and addresses for instruction and data memory (SRAM) in
* 4965 ' s embedded processor . Driver access is via HBUS_TARG_MEM_ * regs . */
# define IWL49_RTC_INST_LOWER_BOUND (0x000000)
# define IWL49_RTC_INST_UPPER_BOUND (0x018000)
# define IWL49_RTC_DATA_LOWER_BOUND (0x800000)
# define IWL49_RTC_DATA_UPPER_BOUND (0x80A000)
# define IWL49_RTC_INST_SIZE (IWL49_RTC_INST_UPPER_BOUND - \
IWL49_RTC_INST_LOWER_BOUND )
# define IWL49_RTC_DATA_SIZE (IWL49_RTC_DATA_UPPER_BOUND - \
IWL49_RTC_DATA_LOWER_BOUND )
# define IWL49_MAX_INST_SIZE IWL49_RTC_INST_SIZE
# define IWL49_MAX_DATA_SIZE IWL49_RTC_DATA_SIZE
/* Size of uCode instruction memory in bootstrap state machine */
# define IWL49_MAX_BSM_SIZE BSM_SRAM_SIZE
static inline int iwl4965_hw_valid_rtc_data_addr ( u32 addr )
{
return ( addr > = IWL49_RTC_DATA_LOWER_BOUND ) & &
( addr < IWL49_RTC_DATA_UPPER_BOUND ) ;
}
/********************* START TEMPERATURE *************************************/
/**
* 4965 temperature calculation .
*
* The driver must calculate the device temperature before calculating
* a txpower setting ( amplifier gain is temperature dependent ) . The
* calculation uses 4 measurements , 3 of which ( R1 , R2 , R3 ) are calibration
* values used for the life of the driver , and one of which ( R4 ) is the
* real - time temperature indicator .
*
* uCode provides all 4 values to the driver via the " initialize alive "
* notification ( see struct iwl4965_init_alive_resp ) . After the runtime uCode
* image loads , uCode updates the R4 value via statistics notifications
* ( see STATISTICS_NOTIFICATION ) , which occur after each received beacon
* when associated , or can be requested via REPLY_STATISTICS_CMD .
*
* NOTE : uCode provides the R4 value as a 23 - bit signed value . Driver
* must sign - extend to 32 bits before applying formula below .
*
* Formula :
*
* degrees Kelvin = ( ( 97 * 259 * ( R4 - R2 ) / ( R3 - R1 ) ) / 100 ) + 8
*
* NOTE : The basic formula is 259 * ( R4 - R2 ) / ( R3 - R1 ) . The 97 / 100 is
* an additional correction , which should be centered around 0 degrees
* Celsius ( 273 degrees Kelvin ) . The 8 ( 3 percent of 273 ) compensates for
* centering the 97 / 100 correction around 0 degrees K .
*
* Add 273 to Kelvin value to find degrees Celsius , for comparing current
* temperature with factory - measured temperatures when calculating txpower
* settings .
*/
# define TEMPERATURE_CALIB_KELVIN_OFFSET 8
# define TEMPERATURE_CALIB_A_VAL 259
/* Limit range of calculated temperature to be between these Kelvin values */
# define IWL_TX_POWER_TEMPERATURE_MIN (263)
# define IWL_TX_POWER_TEMPERATURE_MAX (410)
# define IWL_TX_POWER_TEMPERATURE_OUT_OF_RANGE(t) \
( ( ( t ) < IWL_TX_POWER_TEMPERATURE_MIN ) | | \
( ( t ) > IWL_TX_POWER_TEMPERATURE_MAX ) )
/********************* END TEMPERATURE ***************************************/
/********************* START TXPOWER *****************************************/
/**
* 4965 txpower calculations rely on information from three sources :
*
* 1 ) EEPROM
* 2 ) " initialize " alive notification
* 3 ) statistics notifications
*
* EEPROM data consists of :
*
* 1 ) Regulatory information ( max txpower and channel usage flags ) is provided
* separately for each channel that can possibly supported by 4965.
* 40 MHz wide ( .11 n HT40 ) channels are listed separately from 20 MHz
* ( legacy ) channels .
*
* See struct iwl4965_eeprom_channel for format , and struct iwl4965_eeprom
* for locations in EEPROM .
*
* 2 ) Factory txpower calibration information is provided separately for
* sub - bands of contiguous channels . 2.4 GHz has just one sub - band ,
* but 5 GHz has several sub - bands .
*
* In addition , per - band ( 2.4 and 5 Ghz ) saturation txpowers are provided .
*
* See struct iwl4965_eeprom_calib_info ( and the tree of structures
* contained within it ) for format , and struct iwl4965_eeprom for
* locations in EEPROM .
*
* " Initialization alive " notification ( see struct iwl4965_init_alive_resp )
* consists of :
*
* 1 ) Temperature calculation parameters .
*
* 2 ) Power supply voltage measurement .
*
* 3 ) Tx gain compensation to balance 2 transmitters for MIMO use .
*
* Statistics notifications deliver :
*
* 1 ) Current values for temperature param R4 .
*/
/**
* To calculate a txpower setting for a given desired target txpower , channel ,
* modulation bit rate , and transmitter chain ( 4965 has 2 transmitters to
* support MIMO and transmit diversity ) , driver must do the following :
*
* 1 ) Compare desired txpower vs . ( EEPROM ) regulatory limit for this channel .
* Do not exceed regulatory limit ; reduce target txpower if necessary .
*
* If setting up txpowers for MIMO rates ( rate indexes 8 - 15 , 24 - 31 ) ,
* 2 transmitters will be used simultaneously ; driver must reduce the
* regulatory limit by 3 dB ( half - power ) for each transmitter , so the
* combined total output of the 2 transmitters is within regulatory limits .
*
*
* 2 ) Compare target txpower vs . ( EEPROM ) saturation txpower * reduced by
* backoff for this bit rate * . Do not exceed ( saturation - backoff [ rate ] ) ;
* reduce target txpower if necessary .
*
* Backoff values below are in 1 / 2 dB units ( equivalent to steps in
* txpower gain tables ) :
*
* OFDM 6 - 36 MBit : 10 steps ( 5 dB )
* OFDM 48 MBit : 15 steps ( 7.5 dB )
* OFDM 54 MBit : 17 steps ( 8.5 dB )
* OFDM 60 MBit : 20 steps ( 10 dB )
* CCK all rates : 10 steps ( 5 dB )
*
* Backoff values apply to saturation txpower on a per - transmitter basis ;
* when using MIMO ( 2 transmitters ) , each transmitter uses the same
* saturation level provided in EEPROM , and the same backoff values ;
* no reduction ( such as with regulatory txpower limits ) is required .
*
* Saturation and Backoff values apply equally to 20 Mhz ( legacy ) channel
* widths and 40 Mhz ( .11 n HT40 ) channel widths ; there is no separate
* factory measurement for ht40 channels .
*
* The result of this step is the final target txpower . The rest of
* the steps figure out the proper settings for the device to achieve
* that target txpower .
*
*
* 3 ) Determine ( EEPROM ) calibration sub band for the target channel , by
* comparing against first and last channels in each sub band
* ( see struct iwl4965_eeprom_calib_subband_info ) .
*
*
* 4 ) Linearly interpolate ( EEPROM ) factory calibration measurement sets ,
* referencing the 2 factory - measured ( sample ) channels within the sub band .
*
* Interpolation is based on difference between target channel ' s frequency
* and the sample channels ' frequencies . Since channel numbers are based
* on frequency ( 5 MHz between each channel number ) , this is equivalent
* to interpolating based on channel number differences .
*
* Note that the sample channels may or may not be the channels at the
* edges of the sub band . The target channel may be " outside " of the
* span of the sampled channels .
*
* Driver may choose the pair ( for 2 Tx chains ) of measurements ( see
* struct iwl4965_eeprom_calib_ch_info ) for which the actual measured
* txpower comes closest to the desired txpower . Usually , though ,
* the middle set of measurements is closest to the regulatory limits ,
* and is therefore a good choice for all txpower calculations ( this
* assumes that high accuracy is needed for maximizing legal txpower ,
* while lower txpower configurations do not need as much accuracy ) .
*
* Driver should interpolate both members of the chosen measurement pair ,
* i . e . for both Tx chains ( radio transmitters ) , unless the driver knows
* that only one of the chains will be used ( e . g . only one tx antenna
* connected , but this should be unusual ) . The rate scaling algorithm
* switches antennas to find best performance , so both Tx chains will
* be used ( although only one at a time ) even for non - MIMO transmissions .
*
* Driver should interpolate factory values for temperature , gain table
* index , and actual power . The power amplifier detector values are
* not used by the driver .
*
* Sanity check : If the target channel happens to be one of the sample
* channels , the results should agree with the sample channel ' s
* measurements !
*
*
* 5 ) Find difference between desired txpower and ( interpolated )
* factory - measured txpower . Using ( interpolated ) factory gain table index
* ( shown elsewhere ) as a starting point , adjust this index lower to
* increase txpower , or higher to decrease txpower , until the target
* txpower is reached . Each step in the gain table is 1 / 2 dB .
*
* For example , if factory measured txpower is 16 dBm , and target txpower
* is 13 dBm , add 6 steps to the factory gain index to reduce txpower
* by 3 dB .
*
*
* 6 ) Find difference between current device temperature and ( interpolated )
* factory - measured temperature for sub - band . Factory values are in
* degrees Celsius . To calculate current temperature , see comments for
* " 4965 temperature calculation " .
*
* If current temperature is higher than factory temperature , driver must
* increase gain ( lower gain table index ) , and vice verse .
*
* Temperature affects gain differently for different channels :
*
* 2.4 GHz all channels : 3.5 degrees per half - dB step
* 5 GHz channels 34 - 43 : 4.5 degrees per half - dB step
* 5 GHz channels > = 44 : 4.0 degrees per half - dB step
*
* NOTE : Temperature can increase rapidly when transmitting , especially
* with heavy traffic at high txpowers . Driver should update
* temperature calculations often under these conditions to
* maintain strong txpower in the face of rising temperature .
*
*
* 7 ) Find difference between current power supply voltage indicator
* ( from " initialize alive " ) and factory - measured power supply voltage
* indicator ( EEPROM ) .
*
* If the current voltage is higher ( indicator is lower ) than factory
* voltage , gain should be reduced ( gain table index increased ) by :
*
* ( eeprom - current ) / 7
*
* If the current voltage is lower ( indicator is higher ) than factory
* voltage , gain should be increased ( gain table index decreased ) by :
*
* 2 * ( current - eeprom ) / 7
*
* If number of index steps in either direction turns out to be > 2 ,
* something is wrong . . . just use 0.
*
* NOTE : Voltage compensation is independent of band / channel .
*
* NOTE : " Initialize " uCode measures current voltage , which is assumed
* to be constant after this initial measurement . Voltage
* compensation for txpower ( number of steps in gain table )
* may be calculated once and used until the next uCode bootload .
*
*
* 8 ) If setting up txpowers for MIMO rates ( rate indexes 8 - 15 , 24 - 31 ) ,
* adjust txpower for each transmitter chain , so txpower is balanced
* between the two chains . There are 5 pairs of tx_atten [ group ] [ chain ]
* values in " initialize alive " , one pair for each of 5 channel ranges :
*
* Group 0 : 5 GHz channel 34 - 43
* Group 1 : 5 GHz channel 44 - 70
* Group 2 : 5 GHz channel 71 - 124
* Group 3 : 5 GHz channel 125 - 200
* Group 4 : 2.4 GHz all channels
*
* Add the tx_atten [ group ] [ chain ] value to the index for the target chain .
* The values are signed , but are in pairs of 0 and a non - negative number ,
* so as to reduce gain ( if necessary ) of the " hotter " channel . This
* avoids any need to double - check for regulatory compliance after
* this step .
*
*
* 9 ) If setting up for a CCK rate , lower the gain by adding a CCK compensation
* value to the index :
*
* Hardware rev B : 9 steps ( 4.5 dB )
* Hardware rev C : 5 steps ( 2.5 dB )
*
* Hardware rev for 4965 can be determined by reading CSR_HW_REV_WA_REG ,
* bits [ 3 : 2 ] , 1 = B , 2 = C .
*
* NOTE : This compensation is in addition to any saturation backoff that
* might have been applied in an earlier step .
*
*
* 10 ) Select the gain table , based on band ( 2.4 vs 5 GHz ) .
*
* Limit the adjusted index to stay within the table !
*
*
* 11 ) Read gain table entries for DSP and radio gain , place into appropriate
* location ( s ) in command ( struct iwl4965_txpowertable_cmd ) .
*/
/**
* When MIMO is used ( 2 transmitters operating simultaneously ) , driver should
* limit each transmitter to deliver a max of 3 dB below the regulatory limit
* for the device . That is , use half power for each transmitter , so total
* txpower is within regulatory limits .
*
* The value " 6 " represents number of steps in gain table to reduce power 3 dB .
* Each step is 1 / 2 dB .
*/
# define IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION (6)
/**
* CCK gain compensation .
*
* When calculating txpowers for CCK , after making sure that the target power
* is within regulatory and saturation limits , driver must additionally
* back off gain by adding these values to the gain table index .
*
* Hardware rev for 4965 can be determined by reading CSR_HW_REV_WA_REG ,
* bits [ 3 : 2 ] , 1 = B , 2 = C .
*/
# define IWL_TX_POWER_CCK_COMPENSATION_B_STEP (9)
# define IWL_TX_POWER_CCK_COMPENSATION_C_STEP (5)
/*
* 4965 power supply voltage compensation for txpower
*/
# define TX_POWER_IWL_VOLTAGE_CODES_PER_03V (7)
/**
* Gain tables .
*
* The following tables contain pair of values for setting txpower , i . e .
* gain settings for the output of the device ' s digital signal processor ( DSP ) ,
* and for the analog gain structure of the transmitter .
*
* Each entry in the gain tables represents a step of 1 / 2 dB . Note that these
* are * relative * steps , not indications of absolute output power . Output
* power varies with temperature , voltage , and channel frequency , and also
* requires consideration of average power ( to satisfy regulatory constraints ) ,
* and peak power ( to avoid distortion of the output signal ) .
*
* Each entry contains two values :
* 1 ) DSP gain ( or sometimes called DSP attenuation ) . This is a fine - grained
* linear value that multiplies the output of the digital signal processor ,
* before being sent to the analog radio .
* 2 ) Radio gain . This sets the analog gain of the radio Tx path .
* It is a coarser setting , and behaves in a logarithmic ( dB ) fashion .
*
* EEPROM contains factory calibration data for txpower . This maps actual
* measured txpower levels to gain settings in the " well known " tables
* below ( " well-known " means here that both factory calibration * and * the
* driver work with the same table ) .
*
* There are separate tables for 2.4 GHz and 5 GHz bands . The 5 GHz table
* has an extension ( into negative indexes ) , in case the driver needs to
* boost power setting for high device temperatures ( higher than would be
* present during factory calibration ) . A 5 Ghz EEPROM index of " 40 "
* corresponds to the 49 th entry in the table used by the driver .
*/
# define MIN_TX_GAIN_INDEX (0) /* highest gain, lowest idx, 2.4 */
# define MIN_TX_GAIN_INDEX_52GHZ_EXT (-9) /* highest gain, lowest idx, 5 */
/**
* 2.4 GHz gain table
*
* Index Dsp gain Radio gain
* 0 110 0x3f ( highest gain )
* 1 104 0x3f
* 2 98 0x3f
* 3 110 0x3e
* 4 104 0x3e
* 5 98 0x3e
* 6 110 0x3d
* 7 104 0x3d
* 8 98 0x3d
* 9 110 0x3c
* 10 104 0x3c
* 11 98 0x3c
* 12 110 0x3b
* 13 104 0x3b
* 14 98 0x3b
* 15 110 0x3a
* 16 104 0x3a
* 17 98 0x3a
* 18 110 0x39
* 19 104 0x39
* 20 98 0x39
* 21 110 0x38
* 22 104 0x38
* 23 98 0x38
* 24 110 0x37
* 25 104 0x37
* 26 98 0x37
* 27 110 0x36
* 28 104 0x36
* 29 98 0x36
* 30 110 0x35
* 31 104 0x35
* 32 98 0x35
* 33 110 0x34
* 34 104 0x34
* 35 98 0x34
* 36 110 0x33
* 37 104 0x33
* 38 98 0x33
* 39 110 0x32
* 40 104 0x32
* 41 98 0x32
* 42 110 0x31
* 43 104 0x31
* 44 98 0x31
* 45 110 0x30
* 46 104 0x30
* 47 98 0x30
* 48 110 0x6
* 49 104 0x6
* 50 98 0x6
* 51 110 0x5
* 52 104 0x5
* 53 98 0x5
* 54 110 0x4
* 55 104 0x4
* 56 98 0x4
* 57 110 0x3
* 58 104 0x3
* 59 98 0x3
* 60 110 0x2
* 61 104 0x2
* 62 98 0x2
* 63 110 0x1
* 64 104 0x1
* 65 98 0x1
* 66 110 0x0
* 67 104 0x0
* 68 98 0x0
* 69 97 0
* 70 96 0
* 71 95 0
* 72 94 0
* 73 93 0
* 74 92 0
* 75 91 0
* 76 90 0
* 77 89 0
* 78 88 0
* 79 87 0
* 80 86 0
* 81 85 0
* 82 84 0
* 83 83 0
* 84 82 0
* 85 81 0
* 86 80 0
* 87 79 0
* 88 78 0
* 89 77 0
* 90 76 0
* 91 75 0
* 92 74 0
* 93 73 0
* 94 72 0
* 95 71 0
* 96 70 0
* 97 69 0
* 98 68 0
*/
/**
* 5 GHz gain table
*
* Index Dsp gain Radio gain
* - 9 123 0x3F ( highest gain )
* - 8 117 0x3F
* - 7 110 0x3F
* - 6 104 0x3F
* - 5 98 0x3F
* - 4 110 0x3E
* - 3 104 0x3E
* - 2 98 0x3E
* - 1 110 0x3D
* 0 104 0x3D
* 1 98 0x3D
* 2 110 0x3C
* 3 104 0x3C
* 4 98 0x3C
* 5 110 0x3B
* 6 104 0x3B
* 7 98 0x3B
* 8 110 0x3A
* 9 104 0x3A
* 10 98 0x3A
* 11 110 0x39
* 12 104 0x39
* 13 98 0x39
* 14 110 0x38
* 15 104 0x38
* 16 98 0x38
* 17 110 0x37
* 18 104 0x37
* 19 98 0x37
* 20 110 0x36
* 21 104 0x36
* 22 98 0x36
* 23 110 0x35
* 24 104 0x35
* 25 98 0x35
* 26 110 0x34
* 27 104 0x34
* 28 98 0x34
* 29 110 0x33
* 30 104 0x33
* 31 98 0x33
* 32 110 0x32
* 33 104 0x32
* 34 98 0x32
* 35 110 0x31
* 36 104 0x31
* 37 98 0x31
* 38 110 0x30
* 39 104 0x30
* 40 98 0x30
* 41 110 0x25
* 42 104 0x25
* 43 98 0x25
* 44 110 0x24
* 45 104 0x24
* 46 98 0x24
* 47 110 0x23
* 48 104 0x23
* 49 98 0x23
* 50 110 0x22
* 51 104 0x18
* 52 98 0x18
* 53 110 0x17
* 54 104 0x17
* 55 98 0x17
* 56 110 0x16
* 57 104 0x16
* 58 98 0x16
* 59 110 0x15
* 60 104 0x15
* 61 98 0x15
* 62 110 0x14
* 63 104 0x14
* 64 98 0x14
* 65 110 0x13
* 66 104 0x13
* 67 98 0x13
* 68 110 0x12
* 69 104 0x08
* 70 98 0x08
* 71 110 0x07
* 72 104 0x07
* 73 98 0x07
* 74 110 0x06
* 75 104 0x06
* 76 98 0x06
* 77 110 0x05
* 78 104 0x05
* 79 98 0x05
* 80 110 0x04
* 81 104 0x04
* 82 98 0x04
* 83 110 0x03
* 84 104 0x03
* 85 98 0x03
* 86 110 0x02
* 87 104 0x02
* 88 98 0x02
* 89 110 0x01
* 90 104 0x01
* 91 98 0x01
* 92 110 0x00
* 93 104 0x00
* 94 98 0x00
* 95 93 0x00
* 96 88 0x00
* 97 83 0x00
* 98 78 0x00
*/
/**
* Sanity checks and default values for EEPROM regulatory levels .
* If EEPROM values fall outside MIN / MAX range , use default values .
*
* Regulatory limits refer to the maximum average txpower allowed by
* regulatory agencies in the geographies in which the device is meant
* to be operated . These limits are SKU - specific ( i . e . geography - specific ) ,
* and channel - specific ; each channel has an individual regulatory limit
* listed in the EEPROM .
*
* Units are in half - dBm ( i . e . " 34 " means 17 dBm ) .
*/
# define IWL_TX_POWER_DEFAULT_REGULATORY_24 (34)
# define IWL_TX_POWER_DEFAULT_REGULATORY_52 (34)
# define IWL_TX_POWER_REGULATORY_MIN (0)
# define IWL_TX_POWER_REGULATORY_MAX (34)
/**
* Sanity checks and default values for EEPROM saturation levels .
* If EEPROM values fall outside MIN / MAX range , use default values .
*
* Saturation is the highest level that the output power amplifier can produce
* without significant clipping distortion . This is a " peak " power level .
* Different types of modulation ( i . e . various " rates " , and OFDM vs . CCK )
* require differing amounts of backoff , relative to their average power output ,
* in order to avoid clipping distortion .
*
* Driver must make sure that it is violating neither the saturation limit ,
* nor the regulatory limit , when calculating Tx power settings for various
* rates .
*
* Units are in half - dBm ( i . e . " 38 " means 19 dBm ) .
*/
# define IWL_TX_POWER_DEFAULT_SATURATION_24 (38)
# define IWL_TX_POWER_DEFAULT_SATURATION_52 (38)
# define IWL_TX_POWER_SATURATION_MIN (20)
# define IWL_TX_POWER_SATURATION_MAX (50)
/**
* Channel groups used for Tx Attenuation calibration ( MIMO tx channel balance )
* and thermal Txpower calibration .
*
* When calculating txpower , driver must compensate for current device
* temperature ; higher temperature requires higher gain . Driver must calculate
* current temperature ( see " 4965 temperature calculation " ) , then compare vs .
* factory calibration temperature in EEPROM ; if current temperature is higher
* than factory temperature , driver must * increase * gain by proportions shown
* in table below . If current temperature is lower than factory , driver must
* * decrease * gain .
*
* Different frequency ranges require different compensation , as shown below .
*/
/* Group 0, 5.2 GHz ch 34-43: 4.5 degrees per 1/2 dB. */
# define CALIB_IWL_TX_ATTEN_GR1_FCH 34
# define CALIB_IWL_TX_ATTEN_GR1_LCH 43
/* Group 1, 5.3 GHz ch 44-70: 4.0 degrees per 1/2 dB. */
# define CALIB_IWL_TX_ATTEN_GR2_FCH 44
# define CALIB_IWL_TX_ATTEN_GR2_LCH 70
/* Group 2, 5.5 GHz ch 71-124: 4.0 degrees per 1/2 dB. */
# define CALIB_IWL_TX_ATTEN_GR3_FCH 71
# define CALIB_IWL_TX_ATTEN_GR3_LCH 124
/* Group 3, 5.7 GHz ch 125-200: 4.0 degrees per 1/2 dB. */
# define CALIB_IWL_TX_ATTEN_GR4_FCH 125
# define CALIB_IWL_TX_ATTEN_GR4_LCH 200
/* Group 4, 2.4 GHz all channels: 3.5 degrees per 1/2 dB. */
# define CALIB_IWL_TX_ATTEN_GR5_FCH 1
# define CALIB_IWL_TX_ATTEN_GR5_LCH 20
enum {
CALIB_CH_GROUP_1 = 0 ,
CALIB_CH_GROUP_2 = 1 ,
CALIB_CH_GROUP_3 = 2 ,
CALIB_CH_GROUP_4 = 3 ,
CALIB_CH_GROUP_5 = 4 ,
CALIB_CH_GROUP_MAX
} ;
/********************* END TXPOWER *****************************************/
/**
* Tx / Rx Queues
*
* Most communication between driver and 4965 is via queues of data buffers .
* For example , all commands that the driver issues to device ' s embedded
* controller ( uCode ) are via the command queue ( one of the Tx queues ) . All
* uCode command responses / replies / notifications , including Rx frames , are
* conveyed from uCode to driver via the Rx queue .
*
* Most support for these queues , including handshake support , resides in
* structures in host DRAM , shared between the driver and the device . When
* allocating this memory , the driver must make sure that data written by
* the host CPU updates DRAM immediately ( and does not get " stuck " in CPU ' s
* cache memory ) , so DRAM and cache are consistent , and the device can
* immediately see changes made by the driver .
*
* 4965 supports up to 16 DRAM - based Tx queues , and services these queues via
* up to 7 DMA channels ( FIFOs ) . Each Tx queue is supported by a circular array
* in DRAM containing 256 Transmit Frame Descriptors ( TFDs ) .
*/
# define IWL49_NUM_FIFOS 7
# define IWL49_CMD_FIFO_NUM 4
# define IWL49_NUM_QUEUES 16
# define IWL49_NUM_AMPDU_QUEUES 8
/**
* struct iwl4965_schedq_bc_tbl
*
* Byte Count table
*
* Each Tx queue uses a byte - count table containing 320 entries :
* one 16 - bit entry for each of 256 TFDs , plus an additional 64 entries that
* duplicate the first 64 entries ( to avoid wrap - around within a Tx window ;
* max Tx window is 64 TFDs ) .
*
* When driver sets up a new TFD , it must also enter the total byte count
* of the frame to be transmitted into the corresponding entry in the byte
* count table for the chosen Tx queue . If the TFD index is 0 - 63 , the driver
* must duplicate the byte count entry in corresponding index 256 - 319.
*
* padding puts each byte count table on a 1024 - byte boundary ;
* 4965 assumes tables are separated by 1024 bytes .
*/
struct iwl4965_scd_bc_tbl {
__le16 tfd_offset [ TFD_QUEUE_BC_SIZE ] ;
u8 pad [ 1024 - ( TFD_QUEUE_BC_SIZE ) * sizeof ( __le16 ) ] ;
} __packed ;
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# define IWL4965_RTC_INST_LOWER_BOUND (0x000000)
/* RSSI to dBm */
# define IWL4965_RSSI_OFFSET 44
/* PCI registers */
# define PCI_CFG_RETRY_TIMEOUT 0x041
/* PCI register values */
# define PCI_CFG_LINK_CTRL_VAL_L0S_EN 0x01
# define PCI_CFG_LINK_CTRL_VAL_L1_EN 0x02
# define IWL4965_DEFAULT_TX_RETRY 15
/* EEPROM */
# define IWL4965_FIRST_AMPDU_QUEUE 10
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# endif /* !__iwl_4965_hw_h__ */
