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/******************************************************************************
*
* 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
#define PCI_CFG_POWER_SOURCE 0x0C8
#define PCI_REG_WUM8 0x0E8
#define PCI_CFG_LINK_CTRL 0x0F0
/* PCI register values */
#define PCI_CFG_LINK_CTRL_VAL_L0S_EN 0x01
#define PCI_CFG_LINK_CTRL_VAL_L1_EN 0x02
#define PCI_CFG_CMD_REG_INT_DIS_MSK 0x04
#define PCI_CFG_PMC_PME_FROM_D3COLD_SUPPORT (0x80000000)
#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 fat) 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 fat) channel widths; there is no separate
* factory measurement for fat 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.
|