drivers/net/wireless/iwlwifi/iwl-4965-hw.h

   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
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  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
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  17  * General Public License for more details.
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  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  *
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  33  * Copyright(c) 2005 - 2009 Intel Corporation. All rights reserved.
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  48  *    from this software without specific prior written permission.
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  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  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  */
  68
  69 #ifndef __iwl_4965_hw_h__
  70 #define __iwl_4965_hw_h__
  71
  72 #include "iwl-fh.h"
  73
  74 /* EEPROM */
  75 #define IWL4965_EEPROM_IMG_SIZE                 1024
  76
  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
  86
  87 /* Time constants */
  88 #define SHORT_SLOT_TIME 9
  89 #define LONG_SLOT_TIME 20
  90
  91 /* RSSI to dBm */
  92 #define IWL49_RSSI_OFFSET       44
  93
  94
  95
  96 /* PCI registers */
  97 #define PCI_CFG_RETRY_TIMEOUT   0x041
  98 #define PCI_CFG_POWER_SOURCE    0x0C8
  99 #define PCI_REG_WUM8            0x0E8
 100 #define PCI_CFG_LINK_CTRL       0x0F0
 101
 102 /* PCI register values */
 103 #define PCI_CFG_LINK_CTRL_VAL_L0S_EN    0x01
 104 #define PCI_CFG_LINK_CTRL_VAL_L1_EN     0x02
 105 #define PCI_CFG_CMD_REG_INT_DIS_MSK     0x04
 106 #define PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT         (0x80000000)
 107
 108
 109 #define IWL_NUM_SCAN_RATES         (2)
 110
 111 #define IWL_DEFAULT_TX_RETRY  15
 112
 113
 114 /* Sizes and addresses for instruction and data memory (SRAM) in
 115  * 4965's embedded processor.  Driver access is via HBUS_TARG_MEM_* regs. */
 116 #define IWL49_RTC_INST_LOWER_BOUND              (0x000000)
 117 #define IWL49_RTC_INST_UPPER_BOUND              (0x018000)
 118
 119 #define IWL49_RTC_DATA_LOWER_BOUND              (0x800000)
 120 #define IWL49_RTC_DATA_UPPER_BOUND              (0x80A000)
 121
 122 #define IWL49_RTC_INST_SIZE  (IWL49_RTC_INST_UPPER_BOUND - \
 123                                 IWL49_RTC_INST_LOWER_BOUND)
 124 #define IWL49_RTC_DATA_SIZE  (IWL49_RTC_DATA_UPPER_BOUND - \
 125                                 IWL49_RTC_DATA_LOWER_BOUND)
 126
 127 #define IWL49_MAX_INST_SIZE IWL49_RTC_INST_SIZE
 128 #define IWL49_MAX_DATA_SIZE IWL49_RTC_DATA_SIZE
 129
 130 /* Size of uCode instruction memory in bootstrap state machine */
 131 #define IWL49_MAX_BSM_SIZE BSM_SRAM_SIZE
 132
 133 static inline int iwl4965_hw_valid_rtc_data_addr(u32 addr)
 134 {
 135         return (addr >= IWL49_RTC_DATA_LOWER_BOUND) &&
 136                (addr < IWL49_RTC_DATA_UPPER_BOUND);
 137 }
 138
 139 /********************* START TEMPERATURE *************************************/
 140
 141 /**
 142  * 4965 temperature calculation.
 143  *
 144  * The driver must calculate the device temperature before calculating
 145  * a txpower setting (amplifier gain is temperature dependent).  The
 146  * calculation uses 4 measurements, 3 of which (R1, R2, R3) are calibration
 147  * values used for the life of the driver, and one of which (R4) is the
 148  * real-time temperature indicator.
 149  *
 150  * uCode provides all 4 values to the driver via the "initialize alive"
 151  * notification (see struct iwl4965_init_alive_resp).  After the runtime uCode
 152  * image loads, uCode updates the R4 value via statistics notifications
 153  * (see STATISTICS_NOTIFICATION), which occur after each received beacon
 154  * when associated, or can be requested via REPLY_STATISTICS_CMD.
 155  *
 156  * NOTE:  uCode provides the R4 value as a 23-bit signed value.  Driver
 157  *        must sign-extend to 32 bits before applying formula below.
 158  *
 159  * Formula:
 160  *
 161  * degrees Kelvin = ((97 * 259 * (R4 - R2) / (R3 - R1)) / 100) + 8
 162  *
 163  * NOTE:  The basic formula is 259 * (R4-R2) / (R3-R1).  The 97/100 is
 164  * an additional correction, which should be centered around 0 degrees
 165  * Celsius (273 degrees Kelvin).  The 8 (3 percent of 273) compensates for
 166  * centering the 97/100 correction around 0 degrees K.
 167  *
 168  * Add 273 to Kelvin value to find degrees Celsius, for comparing current
 169  * temperature with factory-measured temperatures when calculating txpower
 170  * settings.
 171  */
 172 #define TEMPERATURE_CALIB_KELVIN_OFFSET 8
 173 #define TEMPERATURE_CALIB_A_VAL 259
 174
 175 /* Limit range of calculated temperature to be between these Kelvin values */
 176 #define IWL_TX_POWER_TEMPERATURE_MIN  (263)
 177 #define IWL_TX_POWER_TEMPERATURE_MAX  (410)
 178
 179 #define IWL_TX_POWER_TEMPERATURE_OUT_OF_RANGE(t) \
 180         (((t) < IWL_TX_POWER_TEMPERATURE_MIN) || \
 181          ((t) > IWL_TX_POWER_TEMPERATURE_MAX))
 182
 183 /********************* END TEMPERATURE ***************************************/
 184
 185 /********************* START TXPOWER *****************************************/
 186
 187 /**
 188  * 4965 txpower calculations rely on information from three sources:
 189  *
 190  *     1) EEPROM
 191  *     2) "initialize" alive notification
 192  *     3) statistics notifications
 193  *
 194  * EEPROM data consists of:
 195  *
 196  * 1)  Regulatory information (max txpower and channel usage flags) is provided
 197  *     separately for each channel that can possibly supported by 4965.
 198  *     40 MHz wide (.11n fat) channels are listed separately from 20 MHz
 199  *     (legacy) channels.
 200  *
 201  *     See struct iwl4965_eeprom_channel for format, and struct iwl4965_eeprom
 202  *     for locations in EEPROM.
 203  *
 204  * 2)  Factory txpower calibration information is provided separately for
 205  *     sub-bands of contiguous channels.  2.4GHz has just one sub-band,
 206  *     but 5 GHz has several sub-bands.
 207  *
 208  *     In addition, per-band (2.4 and 5 Ghz) saturation txpowers are provided.
 209  *
 210  *     See struct iwl4965_eeprom_calib_info (and the tree of structures
 211  *     contained within it) for format, and struct iwl4965_eeprom for
 212  *     locations in EEPROM.
 213  *
 214  * "Initialization alive" notification (see struct iwl4965_init_alive_resp)
 215  * consists of:
 216  *
 217  * 1)  Temperature calculation parameters.
 218  *
 219  * 2)  Power supply voltage measurement.
 220  *
 221  * 3)  Tx gain compensation to balance 2 transmitters for MIMO use.
 222  *
 223  * Statistics notifications deliver:
 224  *
 225  * 1)  Current values for temperature param R4.
 226  */
 227
 228 /**
 229  * To calculate a txpower setting for a given desired target txpower, channel,
 230  * modulation bit rate, and transmitter chain (4965 has 2 transmitters to
 231  * support MIMO and transmit diversity), driver must do the following:
 232  *
 233  * 1)  Compare desired txpower vs. (EEPROM) regulatory limit for this channel.
 234  *     Do not exceed regulatory limit; reduce target txpower if necessary.
 235  *
 236  *     If setting up txpowers for MIMO rates (rate indexes 8-15, 24-31),
 237  *     2 transmitters will be used simultaneously; driver must reduce the
 238  *     regulatory limit by 3 dB (half-power) for each transmitter, so the
 239  *     combined total output of the 2 transmitters is within regulatory limits.
 240  *
 241  *
 242  * 2)  Compare target txpower vs. (EEPROM) saturation txpower *reduced by
 243  *     backoff for this bit rate*.  Do not exceed (saturation - backoff[rate]);
 244  *     reduce target txpower if necessary.
 245  *
 246  *     Backoff values below are in 1/2 dB units (equivalent to steps in
 247  *     txpower gain tables):
 248  *
 249  *     OFDM 6 - 36 MBit:  10 steps (5 dB)
 250  *     OFDM 48 MBit:      15 steps (7.5 dB)
 251  *     OFDM 54 MBit:      17 steps (8.5 dB)
 252  *     OFDM 60 MBit:      20 steps (10 dB)
 253  *     CCK all rates:     10 steps (5 dB)
 254  *
 255  *     Backoff values apply to saturation txpower on a per-transmitter basis;
 256  *     when using MIMO (2 transmitters), each transmitter uses the same
 257  *     saturation level provided in EEPROM, and the same backoff values;
 258  *     no reduction (such as with regulatory txpower limits) is required.
 259  *
 260  *     Saturation and Backoff values apply equally to 20 Mhz (legacy) channel
 261  *     widths and 40 Mhz (.11n fat) channel widths; there is no separate
 262  *     factory measurement for fat channels.
 263  *
 264  *     The result of this step is the final target txpower.  The rest of
 265  *     the steps figure out the proper settings for the device to achieve
 266  *     that target txpower.
 267  *
 268  *
 269  * 3)  Determine (EEPROM) calibration sub band for the target channel, by
 270  *     comparing against first and last channels in each sub band
 271  *     (see struct iwl4965_eeprom_calib_subband_info).
 272  *
 273  *
 274  * 4)  Linearly interpolate (EEPROM) factory calibration measurement sets,
 275  *     referencing the 2 factory-measured (sample) channels within the sub band.
 276  *
 277  *     Interpolation is based on difference between target channel's frequency
 278  *     and the sample channels' frequencies.  Since channel numbers are based
 279  *     on frequency (5 MHz between each channel number), this is equivalent
 280  *     to interpolating based on channel number differences.
 281  *
 282  *     Note that the sample channels may or may not be the channels at the
 283  *     edges of the sub band.  The target channel may be "outside" of the
 284  *     span of the sampled channels.
 285  *
 286  *     Driver may choose the pair (for 2 Tx chains) of measurements (see
 287  *     struct iwl4965_eeprom_calib_ch_info) for which the actual measured
 288  *     txpower comes closest to the desired txpower.  Usually, though,
 289  *     the middle set of measurements is closest to the regulatory limits,
 290  *     and is therefore a good choice for all txpower calculations (this
 291  *     assumes that high accuracy is needed for maximizing legal txpower,
 292  *     while lower txpower configurations do not need as much accuracy).
 293  *
 294  *     Driver should interpolate both members of the chosen measurement pair,
 295  *     i.e. for both Tx chains (radio transmitters), unless the driver knows
 296  *     that only one of the chains will be used (e.g. only one tx antenna
 297  *     connected, but this should be unusual).  The rate scaling algorithm
 298  *     switches antennas to find best performance, so both Tx chains will
 299  *     be used (although only one at a time) even for non-MIMO transmissions.
 300  *
 301  *     Driver should interpolate factory values for temperature, gain table
 302  *     index, and actual power.  The power amplifier detector values are
 303  *     not used by the driver.
 304  *
 305  *     Sanity check:  If the target channel happens to be one of the sample
 306  *     channels, the results should agree with the sample channel's
 307  *     measurements!
 308  *
 309  *
 310  * 5)  Find difference between desired txpower and (interpolated)
 311  *     factory-measured txpower.  Using (interpolated) factory gain table index
 312  *     (shown elsewhere) as a starting point, adjust this index lower to
 313  *     increase txpower, or higher to decrease txpower, until the target
 314  *     txpower is reached.  Each step in the gain table is 1/2 dB.
 315  *
 316  *     For example, if factory measured txpower is 16 dBm, and target txpower
 317  *     is 13 dBm, add 6 steps to the factory gain index to reduce txpower
 318  *     by 3 dB.
 319  *
 320  *
 321  * 6)  Find difference between current device temperature and (interpolated)
 322  *     factory-measured temperature for sub-band.  Factory values are in
 323  *     degrees Celsius.  To calculate current temperature, see comments for
 324  *     "4965 temperature calculation".
 325  *
 326  *     If current temperature is higher than factory temperature, driver must
 327  *     increase gain (lower gain table index), and vice verse.
 328  *
 329  *     Temperature affects gain differently for different channels:
 330  *
 331  *     2.4 GHz all channels:  3.5 degrees per half-dB step
 332  *     5 GHz channels 34-43:  4.5 degrees per half-dB step
 333  *     5 GHz channels >= 44:  4.0 degrees per half-dB step
 334  *
 335  *     NOTE:  Temperature can increase rapidly when transmitting, especially
 336  *            with heavy traffic at high txpowers.  Driver should update
 337  *            temperature calculations often under these conditions to
 338  *            maintain strong txpower in the face of rising temperature.
 339  *
 340  *
 341  * 7)  Find difference between current power supply voltage indicator
 342  *     (from "initialize alive") and factory-measured power supply voltage
 343  *     indicator (EEPROM).
 344  *
 345  *     If the current voltage is higher (indicator is lower) than factory
 346  *     voltage, gain should be reduced (gain table index increased) by:
 347  *
 348  *     (eeprom - current) / 7
 349  *
 350  *     If the current voltage is lower (indicator is higher) than factory
 351  *     voltage, gain should be increased (gain table index decreased) by:
 352  *
 353  *     2 * (current - eeprom) / 7
 354  *
 355  *     If number of index steps in either direction turns out to be > 2,
 356  *     something is wrong ... just use 0.
 357  *
 358  *     NOTE:  Voltage compensation is independent of band/channel.
 359  *
 360  *     NOTE:  "Initialize" uCode measures current voltage, which is assumed
 361  *            to be constant after this initial measurement.  Voltage
 362  *            compensation for txpower (number of steps in gain table)
 363  *            may be calculated once and used until the next uCode bootload.
 364  *
 365  *
 366  * 8)  If setting up txpowers for MIMO rates (rate indexes 8-15, 24-31),
 367  *     adjust txpower for each transmitter chain, so txpower is balanced
 368  *     between the two chains.  There are 5 pairs of tx_atten[group][chain]
 369  *     values in "initialize alive", one pair for each of 5 channel ranges:
 370  *
 371  *     Group 0:  5 GHz channel 34-43
 372  *     Group 1:  5 GHz channel 44-70
 373  *     Group 2:  5 GHz channel 71-124
 374  *     Group 3:  5 GHz channel 125-200
 375  *     Group 4:  2.4 GHz all channels
 376  *
 377  *     Add the tx_atten[group][chain] value to the index for the target chain.
 378  *     The values are signed, but are in pairs of 0 and a non-negative number,
 379  *     so as to reduce gain (if necessary) of the "hotter" channel.  This
 380  *     avoids any need to double-check for regulatory compliance after
 381  *     this step.
 382  *
 383  *
 384  * 9)  If setting up for a CCK rate, lower the gain by adding a CCK compensation
 385  *     value to the index:
 386  *
 387  *     Hardware rev B:  9 steps (4.5 dB)
 388  *     Hardware rev C:  5 steps (2.5 dB)
 389  *
 390  *     Hardware rev for 4965 can be determined by reading CSR_HW_REV_WA_REG,
 391  *     bits [3:2], 1 = B, 2 = C.
 392  *
 393  *     NOTE:  This compensation is in addition to any saturation backoff that
 394  *            might have been applied in an earlier step.
 395  *
 396  *
 397  * 10) Select the gain table, based on band (2.4 vs 5 GHz).
 398  *
 399  *     Limit the adjusted index to stay within the table!
 400  *
 401  *
 402  * 11) Read gain table entries for DSP and radio gain, place into appropriate
 403  *     location(s) in command (struct iwl4965_txpowertable_cmd).
 404  */
 405
 406 /* Limit range of txpower output target to be between these values */
 407 #define IWL_TX_POWER_TARGET_POWER_MIN       (0) /* 0 dBm = 1 milliwatt */
 408 #define IWL_TX_POWER_TARGET_POWER_MAX      (16) /* 16 dBm */
 409
 410 /**
 411  * When MIMO is used (2 transmitters operating simultaneously), driver should
 412  * limit each transmitter to deliver a max of 3 dB below the regulatory limit
 413  * for the device.  That is, use half power for each transmitter, so total
 414  * txpower is within regulatory limits.
 415  *
 416  * The value "6" represents number of steps in gain table to reduce power 3 dB.
 417  * Each step is 1/2 dB.
 418  */
 419 #define IWL_TX_POWER_MIMO_REGULATORY_COMPENSATION (6)
 420
 421 /**
 422  * CCK gain compensation.
 423  *
 424  * When calculating txpowers for CCK, after making sure that the target power
 425  * is within regulatory and saturation limits, driver must additionally
 426  * back off gain by adding these values to the gain table index.
 427  *
 428  * Hardware rev for 4965 can be determined by reading CSR_HW_REV_WA_REG,
 429  * bits [3:2], 1 = B, 2 = C.
 430  */
 431 #define IWL_TX_POWER_CCK_COMPENSATION_B_STEP (9)
 432 #define IWL_TX_POWER_CCK_COMPENSATION_C_STEP (5)
 433
 434 /*
 435  * 4965 power supply voltage compensation for txpower
 436  */
 437 #define TX_POWER_IWL_VOLTAGE_CODES_PER_03V   (7)
 438
 439 /**
 440  * Gain tables.
 441  *
 442  * The following tables contain pair of values for setting txpower, i.e.
 443  * gain settings for the output of the device's digital signal processor (DSP),
 444  * and for the analog gain structure of the transmitter.
 445  *
 446  * Each entry in the gain tables represents a step of 1/2 dB.  Note that these
 447  * are *relative* steps, not indications of absolute output power.  Output
 448  * power varies with temperature, voltage, and channel frequency, and also
 449  * requires consideration of average power (to satisfy regulatory constraints),
 450  * and peak power (to avoid distortion of the output signal).
 451  *
 452  * Each entry contains two values:
 453  * 1)  DSP gain (or sometimes called DSP attenuation).  This is a fine-grained
 454  *     linear value that multiplies the output of the digital signal processor,
 455  *     before being sent to the analog radio.
 456  * 2)  Radio gain.  This sets the analog gain of the radio Tx path.
 457  *     It is a coarser setting, and behaves in a logarithmic (dB) fashion.
 458  *
 459  * EEPROM contains factory calibration data for txpower.  This maps actual
 460  * measured txpower levels to gain settings in the "well known" tables
 461  * below ("well-known" means here that both factory calibration *and* the
 462  * driver work with the same table).
 463  *
 464  * There are separate tables for 2.4 GHz and 5 GHz bands.  The 5 GHz table
 465  * has an extension (into negative indexes), in case the driver needs to
 466  * boost power setting for high device temperatures (higher than would be
 467  * present during factory calibration).  A 5 Ghz EEPROM index of "40"
 468  * corresponds to the 49th entry in the table used by the driver.
 469  */
 470 #define MIN_TX_GAIN_INDEX               (0)  /* highest gain, lowest idx, 2.4 */
 471 #define MIN_TX_GAIN_INDEX_52GHZ_EXT     (-9) /* highest gain, lowest idx, 5 */
 472
 473 /**
 474  * 2.4 GHz gain table
 475  *
 476  * Index    Dsp gain   Radio gain
 477  *   0        110         0x3f      (highest gain)
 478  *   1        104         0x3f
 479  *   2         98         0x3f
 480  *   3        110         0x3e
 481  *   4        104         0x3e
 482  *   5         98         0x3e
 483  *   6        110         0x3d
 484  *   7        104         0x3d
 485  *   8         98         0x3d
 486  *   9        110         0x3c
 487  *  10        104         0x3c
 488  *  11         98         0x3c
 489  *  12        110         0x3b
 490  *  13        104         0x3b
 491  *  14         98         0x3b
 492  *  15        110         0x3a
 493  *  16        104         0x3a
 494  *  17         98         0x3a
 495  *  18        110         0x39
 496  *  19        104         0x39
 497  *  20         98         0x39
 498  *  21        110         0x38
 499  *  22        104         0x38
 500  *  23         98         0x38
 501  *  24        110         0x37
 502  *  25        104         0x37
 503  *  26         98         0x37
 504  *  27        110         0x36
 505  *  28        104         0x36
 506  *  29         98         0x36
 507  *  30        110         0x35
 508  *  31        104         0x35
 509  *  32         98         0x35
 510  *  33        110         0x34
 511  *  34        104         0x34
 512  *  35         98         0x34
 513  *  36        110         0x33
 514  *  37        104         0x33
 515  *  38         98         0x33
 516  *  39        110         0x32
 517  *  40        104         0x32
 518  *  41         98         0x32
 519  *  42        110         0x31
 520  *  43        104         0x31
 521  *  44         98         0x31
 522  *  45        110         0x30
 523  *  46        104         0x30
 524  *  47         98         0x30
 525  *  48        110          0x6
 526  *  49        104          0x6
 527  *  50         98          0x6
 528  *  51        110          0x5
 529  *  52        104          0x5
 530  *  53         98          0x5
 531  *  54        110          0x4
 532  *  55        104          0x4
 533  *  56         98          0x4
 534  *  57        110          0x3
 535  *  58        104          0x3
 536  *  59         98          0x3
 537  *  60        110          0x2
 538  *  61        104          0x2
 539  *  62         98          0x2
 540  *  63        110          0x1
 541  *  64        104          0x1
 542  *  65         98          0x1
 543  *  66        110          0x0
 544  *  67        104          0x0
 545  *  68         98          0x0
 546  *  69         97            0
 547  *  70         96            0
 548  *  71         95            0
 549  *  72         94            0
 550  *  73         93            0
 551  *  74         92            0
 552  *  75         91            0
 553  *  76         90            0
 554  *  77         89            0
 555  *  78         88            0
 556  *  79         87            0
 557  *  80         86            0
 558  *  81         85            0
 559  *  82         84            0
 560  *  83         83            0
 561  *  84         82            0
 562  *  85         81            0
 563  *  86         80            0
 564  *  87         79            0
 565  *  88         78            0
 566  *  89         77            0
 567  *  90         76            0
 568  *  91         75            0
 569  *  92         74            0
 570  *  93         73            0
 571  *  94         72            0
 572  *  95         71            0
 573  *  96         70            0
 574  *  97         69            0
 575  *  98         68            0
 576  */
 577
 578 /**
 579  * 5 GHz gain table
 580  *
 581  * Index    Dsp gain   Radio gain
 582  *  -9        123         0x3F      (highest gain)
 583  *  -8        117         0x3F
 584  *  -7        110         0x3F
 585  *  -6        104         0x3F
 586  *  -5         98         0x3F
 587  *  -4        110         0x3E
 588  *  -3        104         0x3E
 589  *  -2         98         0x3E
 590  *  -1        110         0x3D
 591  *   0        104         0x3D
 592  *   1         98         0x3D
 593  *   2        110         0x3C
 594  *   3        104         0x3C
 595  *   4         98         0x3C
 596  *   5        110         0x3B
 597  *   6        104         0x3B
 598  *   7         98         0x3B
 599  *   8        110         0x3A
 600  *   9        104         0x3A
 601  *  10         98         0x3A
 602  *  11        110         0x39
 603  *  12        104         0x39
 604  *  13         98         0x39
 605  *  14        110         0x38
 606  *  15        104         0x38
 607  *  16         98         0x38
 608  *  17        110         0x37
 609  *  18        104         0x37
 610  *  19         98         0x37
 611  *  20        110         0x36
 612  *  21        104         0x36
 613  *  22         98         0x36
 614  *  23        110         0x35
 615  *  24        104         0x35
 616  *  25         98         0x35
 617  *  26        110         0x34
 618  *  27        104         0x34
 619  *  28         98         0x34
 620  *  29        110         0x33
 621  *  30        104         0x33
 622  *  31         98         0x33
 623  *  32        110         0x32
 624  *  33        104         0x32
 625  *  34         98         0x32
 626  *  35        110         0x31
 627  *  36        104         0x31
 628  *  37         98         0x31
 629  *  38        110         0x30
 630  *  39        104         0x30
 631  *  40         98         0x30
 632  *  41        110         0x25
 633  *  42        104         0x25
 634  *  43         98         0x25
 635  *  44        110         0x24
 636  *  45        104         0x24
 637  *  46         98         0x24
 638  *  47        110         0x23
 639  *  48        104         0x23
 640  *  49         98         0x23
 641  *  50        110         0x22
 642  *  51        104         0x18
 643  *  52         98         0x18
 644  *  53        110         0x17
 645  *  54        104         0x17
 646  *  55         98         0x17
 647  *  56        110         0x16
 648  *  57        104         0x16
 649  *  58         98         0x16
 650  *  59        110         0x15
 651  *  60        104         0x15
 652  *  61         98         0x15
 653  *  62        110         0x14
 654  *  63        104         0x14
 655  *  64         98         0x14
 656  *  65        110         0x13
 657  *  66        104         0x13
 658  *  67         98         0x13
 659  *  68        110         0x12
 660  *  69        104         0x08
 661  *  70         98         0x08
 662  *  71        110         0x07
 663  *  72        104         0x07
 664  *  73         98         0x07
 665  *  74        110         0x06
 666  *  75        104         0x06
 667  *  76         98         0x06
 668  *  77        110         0x05
 669  *  78        104         0x05
 670  *  79         98         0x05
 671  *  80        110         0x04
 672  *  81        104         0x04
 673  *  82         98         0x04
 674  *  83        110         0x03
 675  *  84        104         0x03
 676  *  85         98         0x03
 677  *  86        110         0x02
 678  *  87        104         0x02
 679  *  88         98         0x02
 680  *  89        110         0x01
 681  *  90        104         0x01
 682  *  91         98         0x01
 683  *  92        110         0x00
 684  *  93        104         0x00
 685  *  94         98         0x00
 686  *  95         93         0x00
 687  *  96         88         0x00
 688  *  97         83         0x00
 689  *  98         78         0x00
 690  */
 691
 692
 693 /**
 694  * Sanity checks and default values for EEPROM regulatory levels.
 695  * If EEPROM values fall outside MIN/MAX range, use default values.
 696  *
 697  * Regulatory limits refer to the maximum average txpower allowed by
 698  * regulatory agencies in the geographies in which the device is meant
 699  * to be operated.  These limits are SKU-specific (i.e. geography-specific),
 700  * and channel-specific; each channel has an individual regulatory limit
 701  * listed in the EEPROM.
 702  *
 703  * Units are in half-dBm (i.e. "34" means 17 dBm).
 704  */
 705 #define IWL_TX_POWER_DEFAULT_REGULATORY_24   (34)
 706 #define IWL_TX_POWER_DEFAULT_REGULATORY_52   (34)
 707 #define IWL_TX_POWER_REGULATORY_MIN          (0)
 708 #define IWL_TX_POWER_REGULATORY_MAX          (34)
 709
 710 /**
 711  * Sanity checks and default values for EEPROM saturation levels.
 712  * If EEPROM values fall outside MIN/MAX range, use default values.
 713  *
 714  * Saturation is the highest level that the output power amplifier can produce
 715  * without significant clipping distortion.  This is a "peak" power level.
 716  * Different types of modulation (i.e. various "rates", and OFDM vs. CCK)
 717  * require differing amounts of backoff, relative to their average power output,
 718  * in order to avoid clipping distortion.
 719  *
 720  * Driver must make sure that it is violating neither the saturation limit,
 721  * nor the regulatory limit, when calculating Tx power settings for various
 722  * rates.
 723  *
 724  * Units are in half-dBm (i.e. "38" means 19 dBm).
 725  */
 726 #define IWL_TX_POWER_DEFAULT_SATURATION_24   (38)
 727 #define IWL_TX_POWER_DEFAULT_SATURATION_52   (38)
 728 #define IWL_TX_POWER_SATURATION_MIN          (20)
 729 #define IWL_TX_POWER_SATURATION_MAX          (50)
 730
 731 /**
 732  * Channel groups used for Tx Attenuation calibration (MIMO tx channel balance)
 733  * and thermal Txpower calibration.
 734  *
 735  * When calculating txpower, driver must compensate for current device
 736  * temperature; higher temperature requires higher gain.  Driver must calculate
 737  * current temperature (see "4965 temperature calculation"), then compare vs.
 738  * factory calibration temperature in EEPROM; if current temperature is higher
 739  * than factory temperature, driver must *increase* gain by proportions shown
 740  * in table below.  If current temperature is lower than factory, driver must
 741  * *decrease* gain.
 742  *
 743  * Different frequency ranges require different compensation, as shown below.
 744  */
 745 /* Group 0, 5.2 GHz ch 34-43:  4.5 degrees per 1/2 dB. */
 746 #define CALIB_IWL_TX_ATTEN_GR1_FCH 34
 747 #define CALIB_IWL_TX_ATTEN_GR1_LCH 43
 748
 749 /* Group 1, 5.3 GHz ch 44-70:  4.0 degrees per 1/2 dB. */
 750 #define CALIB_IWL_TX_ATTEN_GR2_FCH 44
 751 #define CALIB_IWL_TX_ATTEN_GR2_LCH 70
 752
 753 /* Group 2, 5.5 GHz ch 71-124:  4.0 degrees per 1/2 dB. */
 754 #define CALIB_IWL_TX_ATTEN_GR3_FCH 71
 755 #define CALIB_IWL_TX_ATTEN_GR3_LCH 124
 756
 757 /* Group 3, 5.7 GHz ch 125-200:  4.0 degrees per 1/2 dB. */
 758 #define CALIB_IWL_TX_ATTEN_GR4_FCH 125
 759 #define CALIB_IWL_TX_ATTEN_GR4_LCH 200
 760
 761 /* Group 4, 2.4 GHz all channels:  3.5 degrees per 1/2 dB. */
 762 #define CALIB_IWL_TX_ATTEN_GR5_FCH 1
 763 #define CALIB_IWL_TX_ATTEN_GR5_LCH 20
 764
 765 enum {
 766         CALIB_CH_GROUP_1 = 0,
 767         CALIB_CH_GROUP_2 = 1,
 768         CALIB_CH_GROUP_3 = 2,
 769         CALIB_CH_GROUP_4 = 3,
 770         CALIB_CH_GROUP_5 = 4,
 771         CALIB_CH_GROUP_MAX
 772 };
 773
 774 /********************* END TXPOWER *****************************************/
 775
 776
 777 /**
 778  * Tx/Rx Queues
 779  *
 780  * Most communication between driver and 4965 is via queues of data buffers.
 781  * For example, all commands that the driver issues to device's embedded
 782  * controller (uCode) are via the command queue (one of the Tx queues).  All
 783  * uCode command responses/replies/notifications, including Rx frames, are
 784  * conveyed from uCode to driver via the Rx queue.
 785  *
 786  * Most support for these queues, including handshake support, resides in
 787  * structures in host DRAM, shared between the driver and the device.  When
 788  * allocating this memory, the driver must make sure that data written by
 789  * the host CPU updates DRAM immediately (and does not get "stuck" in CPU's
 790  * cache memory), so DRAM and cache are consistent, and the device can
 791  * immediately see changes made by the driver.
 792  *
 793  * 4965 supports up to 16 DRAM-based Tx queues, and services these queues via
 794  * up to 7 DMA channels (FIFOs).  Each Tx queue is supported by a circular array
 795  * in DRAM containing 256 Transmit Frame Descriptors (TFDs).
 796  */
 797 #define IWL49_NUM_FIFOS         7
 798 #define IWL49_CMD_FIFO_NUM      4
 799 #define IWL49_NUM_QUEUES        16
 800 #define IWL49_NUM_AMPDU_QUEUES  8
 801
 802
 803 /**
 804  * struct iwl4965_schedq_bc_tbl
 805  *
 806  * Byte Count table
 807  *
 808  * Each Tx queue uses a byte-count table containing 320 entries:
 809  * one 16-bit entry for each of 256 TFDs, plus an additional 64 entries that
 810  * duplicate the first 64 entries (to avoid wrap-around within a Tx window;
 811  * max Tx window is 64 TFDs).
 812  *
 813  * When driver sets up a new TFD, it must also enter the total byte count
 814  * of the frame to be transmitted into the corresponding entry in the byte
 815  * count table for the chosen Tx queue.  If the TFD index is 0-63, the driver
 816  * must duplicate the byte count entry in corresponding index 256-319.
 817  *
 818  * padding puts each byte count table on a 1024-byte boundary;
 819  * 4965 assumes tables are separated by 1024 bytes.
 820  */
 821 struct iwl4965_scd_bc_tbl {
 822         __le16 tfd_offset[TFD_QUEUE_BC_SIZE];
 823         u8 pad[1024 - (TFD_QUEUE_BC_SIZE) * sizeof(__le16)];
 824 } __attribute__ ((packed));
 825
 826 #endif /* !__iwl_4965_hw_h__ */