text: /******************************************************************************
   *
   * 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
   *
   * Copyright(c) 2005 - 2009 Intel Corporation. All rights reserved.
   *
   * 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
   *
   * Copyright(c) 2005 - 2009 Intel Corporation. All rights reserved.
   * 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
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * 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 ...
   * Queue #4 is the command queue for 3945 and 4965; map it to Tx FIFO chnl 4.
   * 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 IWL_CMD_QUEUE_NUM       4
  #define IWL_CMD_FIFO_NUM        4
  #define IWL49_FIRST_AMPDU_QUEUE	7
  
  /* Time constants */
  #define SHORT_SLOT_TIME 9
  #define LONG_SLOT_TIME 20
  
  /* RSSI to dBm */
  #define IWL49_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 IWL_NUM_SCAN_RATES         (2)
  
  #define IWL_DEFAULT_TX_RETRY  15
  
  
  /* 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 (.11n 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.  2.4GHz 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 (.11n 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).
   */
  
  /* Limit range of txpower output target to be between these values */
  #define IWL_TX_POWER_TARGET_POWER_MIN       (0)	/* 0 dBm = 1 milliwatt */
  #define IWL_TX_POWER_TARGET_POWER_MAX      (16)	/* 16 dBm */
  
  /**
   * 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 49th 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)];
  } __attribute__ ((packed));
  
  #endif /* !__iwl_4965_hw_h__ */
  