455 lines
15 KiB
C
455 lines
15 KiB
C
/******************************************************************************
|
|
*
|
|
* 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) 2008 - 2010 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 - 2010 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.
|
|
*****************************************************************************/
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <net/mac80211.h>
|
|
|
|
#include "iwl-commands.h"
|
|
#include "iwl-dev.h"
|
|
#include "iwl-core.h"
|
|
#include "iwl-debug.h"
|
|
#include "iwl-agn.h"
|
|
#include "iwl-io.h"
|
|
|
|
/************************** EEPROM BANDS ****************************
|
|
*
|
|
* The iwl_eeprom_band definitions below provide the mapping from the
|
|
* EEPROM contents to the specific channel number supported for each
|
|
* band.
|
|
*
|
|
* For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
|
|
* definition below maps to physical channel 42 in the 5.2GHz spectrum.
|
|
* The specific geography and calibration information for that channel
|
|
* is contained in the eeprom map itself.
|
|
*
|
|
* During init, we copy the eeprom information and channel map
|
|
* information into priv->channel_info_24/52 and priv->channel_map_24/52
|
|
*
|
|
* channel_map_24/52 provides the index in the channel_info array for a
|
|
* given channel. We have to have two separate maps as there is channel
|
|
* overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
|
|
* band_2
|
|
*
|
|
* A value of 0xff stored in the channel_map indicates that the channel
|
|
* is not supported by the hardware at all.
|
|
*
|
|
* A value of 0xfe in the channel_map indicates that the channel is not
|
|
* valid for Tx with the current hardware. This means that
|
|
* while the system can tune and receive on a given channel, it may not
|
|
* be able to associate or transmit any frames on that
|
|
* channel. There is no corresponding channel information for that
|
|
* entry.
|
|
*
|
|
*********************************************************************/
|
|
|
|
/**
|
|
* struct iwl_txpwr_section: eeprom section information
|
|
* @offset: indirect address into eeprom image
|
|
* @count: number of "struct iwl_eeprom_enhanced_txpwr" in this section
|
|
* @band: band type for the section
|
|
* @is_common - true: common section, false: channel section
|
|
* @is_cck - true: cck section, false: not cck section
|
|
* @is_ht_40 - true: all channel in the section are HT40 channel,
|
|
* false: legacy or HT 20 MHz
|
|
* ignore if it is common section
|
|
* @iwl_eeprom_section_channel: channel array in the section,
|
|
* ignore if common section
|
|
*/
|
|
struct iwl_txpwr_section {
|
|
u32 offset;
|
|
u8 count;
|
|
enum ieee80211_band band;
|
|
bool is_common;
|
|
bool is_cck;
|
|
bool is_ht40;
|
|
u8 iwl_eeprom_section_channel[EEPROM_MAX_TXPOWER_SECTION_ELEMENTS];
|
|
};
|
|
|
|
/**
|
|
* section 1 - 3 are regulatory tx power apply to all channels based on
|
|
* modulation: CCK, OFDM
|
|
* Band: 2.4GHz, 5.2GHz
|
|
* section 4 - 10 are regulatory tx power apply to specified channels
|
|
* For example:
|
|
* 1L - Channel 1 Legacy
|
|
* 1HT - Channel 1 HT
|
|
* (1,+1) - Channel 1 HT40 "_above_"
|
|
*
|
|
* Section 1: all CCK channels
|
|
* Section 2: all 2.4 GHz OFDM (Legacy, HT and HT40) channels
|
|
* Section 3: all 5.2 GHz OFDM (Legacy, HT and HT40) channels
|
|
* Section 4: 2.4 GHz 20MHz channels: 1L, 1HT, 2L, 2HT, 10L, 10HT, 11L, 11HT
|
|
* Section 5: 2.4 GHz 40MHz channels: (1,+1) (2,+1) (6,+1) (7,+1) (9,+1)
|
|
* Section 6: 5.2 GHz 20MHz channels: 36L, 64L, 100L, 36HT, 64HT, 100HT
|
|
* Section 7: 5.2 GHz 40MHz channels: (36,+1) (60,+1) (100,+1)
|
|
* Section 8: 2.4 GHz channel: 13L, 13HT
|
|
* Section 9: 2.4 GHz channel: 140L, 140HT
|
|
* Section 10: 2.4 GHz 40MHz channels: (132,+1) (44,+1)
|
|
*
|
|
*/
|
|
static const struct iwl_txpwr_section enhinfo[] = {
|
|
{ EEPROM_LB_CCK_20_COMMON, 1, IEEE80211_BAND_2GHZ, true, true, false },
|
|
{ EEPROM_LB_OFDM_COMMON, 3, IEEE80211_BAND_2GHZ, true, false, false },
|
|
{ EEPROM_HB_OFDM_COMMON, 3, IEEE80211_BAND_5GHZ, true, false, false },
|
|
{ EEPROM_LB_OFDM_20_BAND, 8, IEEE80211_BAND_2GHZ,
|
|
false, false, false,
|
|
{1, 1, 2, 2, 10, 10, 11, 11 } },
|
|
{ EEPROM_LB_OFDM_HT40_BAND, 5, IEEE80211_BAND_2GHZ,
|
|
false, false, true,
|
|
{ 1, 2, 6, 7, 9 } },
|
|
{ EEPROM_HB_OFDM_20_BAND, 6, IEEE80211_BAND_5GHZ,
|
|
false, false, false,
|
|
{ 36, 64, 100, 36, 64, 100 } },
|
|
{ EEPROM_HB_OFDM_HT40_BAND, 3, IEEE80211_BAND_5GHZ,
|
|
false, false, true,
|
|
{ 36, 60, 100 } },
|
|
{ EEPROM_LB_OFDM_20_CHANNEL_13, 2, IEEE80211_BAND_2GHZ,
|
|
false, false, false,
|
|
{ 13, 13 } },
|
|
{ EEPROM_HB_OFDM_20_CHANNEL_140, 2, IEEE80211_BAND_5GHZ,
|
|
false, false, false,
|
|
{ 140, 140 } },
|
|
{ EEPROM_HB_OFDM_HT40_BAND_1, 2, IEEE80211_BAND_5GHZ,
|
|
false, false, true,
|
|
{ 132, 44 } },
|
|
};
|
|
|
|
/******************************************************************************
|
|
*
|
|
* EEPROM related functions
|
|
*
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* The device's EEPROM semaphore prevents conflicts between driver and uCode
|
|
* when accessing the EEPROM; each access is a series of pulses to/from the
|
|
* EEPROM chip, not a single event, so even reads could conflict if they
|
|
* weren't arbitrated by the semaphore.
|
|
*/
|
|
int iwlcore_eeprom_acquire_semaphore(struct iwl_priv *priv)
|
|
{
|
|
u16 count;
|
|
int ret;
|
|
|
|
for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
|
|
/* Request semaphore */
|
|
iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
|
|
CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
|
|
|
|
/* See if we got it */
|
|
ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
|
|
CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
|
|
CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
|
|
EEPROM_SEM_TIMEOUT);
|
|
if (ret >= 0) {
|
|
IWL_DEBUG_IO(priv,
|
|
"Acquired semaphore after %d tries.\n",
|
|
count+1);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
void iwlcore_eeprom_release_semaphore(struct iwl_priv *priv)
|
|
{
|
|
iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
|
|
CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
|
|
|
|
}
|
|
|
|
int iwl_eeprom_check_version(struct iwl_priv *priv)
|
|
{
|
|
u16 eeprom_ver;
|
|
u16 calib_ver;
|
|
|
|
eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
|
|
calib_ver = priv->cfg->ops->lib->eeprom_ops.calib_version(priv);
|
|
|
|
if (eeprom_ver < priv->cfg->eeprom_ver ||
|
|
calib_ver < priv->cfg->eeprom_calib_ver)
|
|
goto err;
|
|
|
|
IWL_INFO(priv, "device EEPROM VER=0x%x, CALIB=0x%x\n",
|
|
eeprom_ver, calib_ver);
|
|
|
|
return 0;
|
|
err:
|
|
IWL_ERR(priv, "Unsupported (too old) EEPROM VER=0x%x < 0x%x "
|
|
"CALIB=0x%x < 0x%x\n",
|
|
eeprom_ver, priv->cfg->eeprom_ver,
|
|
calib_ver, priv->cfg->eeprom_calib_ver);
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
|
|
{
|
|
const u8 *addr = priv->cfg->ops->lib->eeprom_ops.query_addr(priv,
|
|
EEPROM_MAC_ADDRESS);
|
|
memcpy(mac, addr, ETH_ALEN);
|
|
}
|
|
|
|
/**
|
|
* iwl_get_max_txpower_avg - get the highest tx power from all chains.
|
|
* find the highest tx power from all chains for the channel
|
|
*/
|
|
static s8 iwl_get_max_txpower_avg(struct iwl_priv *priv,
|
|
struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
|
|
int element, s8 *max_txpower_in_half_dbm)
|
|
{
|
|
s8 max_txpower_avg = 0; /* (dBm) */
|
|
|
|
IWL_DEBUG_INFO(priv, "%d - "
|
|
"chain_a: %d dB chain_b: %d dB "
|
|
"chain_c: %d dB mimo2: %d dB mimo3: %d dB\n",
|
|
element,
|
|
enhanced_txpower[element].chain_a_max >> 1,
|
|
enhanced_txpower[element].chain_b_max >> 1,
|
|
enhanced_txpower[element].chain_c_max >> 1,
|
|
enhanced_txpower[element].mimo2_max >> 1,
|
|
enhanced_txpower[element].mimo3_max >> 1);
|
|
/* Take the highest tx power from any valid chains */
|
|
if ((priv->cfg->valid_tx_ant & ANT_A) &&
|
|
(enhanced_txpower[element].chain_a_max > max_txpower_avg))
|
|
max_txpower_avg = enhanced_txpower[element].chain_a_max;
|
|
if ((priv->cfg->valid_tx_ant & ANT_B) &&
|
|
(enhanced_txpower[element].chain_b_max > max_txpower_avg))
|
|
max_txpower_avg = enhanced_txpower[element].chain_b_max;
|
|
if ((priv->cfg->valid_tx_ant & ANT_C) &&
|
|
(enhanced_txpower[element].chain_c_max > max_txpower_avg))
|
|
max_txpower_avg = enhanced_txpower[element].chain_c_max;
|
|
if (((priv->cfg->valid_tx_ant == ANT_AB) |
|
|
(priv->cfg->valid_tx_ant == ANT_BC) |
|
|
(priv->cfg->valid_tx_ant == ANT_AC)) &&
|
|
(enhanced_txpower[element].mimo2_max > max_txpower_avg))
|
|
max_txpower_avg = enhanced_txpower[element].mimo2_max;
|
|
if ((priv->cfg->valid_tx_ant == ANT_ABC) &&
|
|
(enhanced_txpower[element].mimo3_max > max_txpower_avg))
|
|
max_txpower_avg = enhanced_txpower[element].mimo3_max;
|
|
|
|
/*
|
|
* max. tx power in EEPROM is in 1/2 dBm format
|
|
* convert from 1/2 dBm to dBm (round-up convert)
|
|
* but we also do not want to loss 1/2 dBm resolution which
|
|
* will impact performance
|
|
*/
|
|
*max_txpower_in_half_dbm = max_txpower_avg;
|
|
return (max_txpower_avg & 0x01) + (max_txpower_avg >> 1);
|
|
}
|
|
|
|
/**
|
|
* iwl_update_common_txpower: update channel tx power
|
|
* update tx power per band based on EEPROM enhanced tx power info.
|
|
*/
|
|
static s8 iwl_update_common_txpower(struct iwl_priv *priv,
|
|
struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
|
|
int section, int element, s8 *max_txpower_in_half_dbm)
|
|
{
|
|
struct iwl_channel_info *ch_info;
|
|
int ch;
|
|
bool is_ht40 = false;
|
|
s8 max_txpower_avg; /* (dBm) */
|
|
|
|
/* it is common section, contain all type (Legacy, HT and HT40)
|
|
* based on the element in the section to determine
|
|
* is it HT 40 or not
|
|
*/
|
|
if (element == EEPROM_TXPOWER_COMMON_HT40_INDEX)
|
|
is_ht40 = true;
|
|
max_txpower_avg =
|
|
iwl_get_max_txpower_avg(priv, enhanced_txpower,
|
|
element, max_txpower_in_half_dbm);
|
|
|
|
ch_info = priv->channel_info;
|
|
|
|
for (ch = 0; ch < priv->channel_count; ch++) {
|
|
/* find matching band and update tx power if needed */
|
|
if ((ch_info->band == enhinfo[section].band) &&
|
|
(ch_info->max_power_avg < max_txpower_avg) &&
|
|
(!is_ht40)) {
|
|
/* Update regulatory-based run-time data */
|
|
ch_info->max_power_avg = ch_info->curr_txpow =
|
|
max_txpower_avg;
|
|
ch_info->scan_power = max_txpower_avg;
|
|
}
|
|
if ((ch_info->band == enhinfo[section].band) && is_ht40 &&
|
|
(ch_info->ht40_max_power_avg < max_txpower_avg)) {
|
|
/* Update regulatory-based run-time data */
|
|
ch_info->ht40_max_power_avg = max_txpower_avg;
|
|
}
|
|
ch_info++;
|
|
}
|
|
return max_txpower_avg;
|
|
}
|
|
|
|
/**
|
|
* iwl_update_channel_txpower: update channel tx power
|
|
* update channel tx power based on EEPROM enhanced tx power info.
|
|
*/
|
|
static s8 iwl_update_channel_txpower(struct iwl_priv *priv,
|
|
struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
|
|
int section, int element, s8 *max_txpower_in_half_dbm)
|
|
{
|
|
struct iwl_channel_info *ch_info;
|
|
int ch;
|
|
u8 channel;
|
|
s8 max_txpower_avg; /* (dBm) */
|
|
|
|
channel = enhinfo[section].iwl_eeprom_section_channel[element];
|
|
max_txpower_avg =
|
|
iwl_get_max_txpower_avg(priv, enhanced_txpower,
|
|
element, max_txpower_in_half_dbm);
|
|
|
|
ch_info = priv->channel_info;
|
|
for (ch = 0; ch < priv->channel_count; ch++) {
|
|
/* find matching channel and update tx power if needed */
|
|
if (ch_info->channel == channel) {
|
|
if ((ch_info->max_power_avg < max_txpower_avg) &&
|
|
(!enhinfo[section].is_ht40)) {
|
|
/* Update regulatory-based run-time data */
|
|
ch_info->max_power_avg = max_txpower_avg;
|
|
ch_info->curr_txpow = max_txpower_avg;
|
|
ch_info->scan_power = max_txpower_avg;
|
|
}
|
|
if ((enhinfo[section].is_ht40) &&
|
|
(ch_info->ht40_max_power_avg < max_txpower_avg)) {
|
|
/* Update regulatory-based run-time data */
|
|
ch_info->ht40_max_power_avg = max_txpower_avg;
|
|
}
|
|
break;
|
|
}
|
|
ch_info++;
|
|
}
|
|
return max_txpower_avg;
|
|
}
|
|
|
|
/**
|
|
* iwlcore_eeprom_enhanced_txpower: process enhanced tx power info
|
|
*/
|
|
void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
|
|
{
|
|
int eeprom_section_count = 0;
|
|
int section, element;
|
|
struct iwl_eeprom_enhanced_txpwr *enhanced_txpower;
|
|
u32 offset;
|
|
s8 max_txpower_avg; /* (dBm) */
|
|
s8 max_txpower_in_half_dbm; /* (half-dBm) */
|
|
|
|
/* Loop through all the sections
|
|
* adjust bands and channel's max tx power
|
|
* Set the tx_power_user_lmt to the highest power
|
|
* supported by any channels and chains
|
|
*/
|
|
for (section = 0; section < ARRAY_SIZE(enhinfo); section++) {
|
|
eeprom_section_count = enhinfo[section].count;
|
|
offset = enhinfo[section].offset;
|
|
enhanced_txpower = (struct iwl_eeprom_enhanced_txpwr *)
|
|
iwl_eeprom_query_addr(priv, offset);
|
|
|
|
/*
|
|
* check for valid entry -
|
|
* different version of EEPROM might contain different set
|
|
* of enhanced tx power table
|
|
* always check for valid entry before process
|
|
* the information
|
|
*/
|
|
if (!enhanced_txpower->common || enhanced_txpower->reserved)
|
|
continue;
|
|
|
|
for (element = 0; element < eeprom_section_count; element++) {
|
|
if (enhinfo[section].is_common)
|
|
max_txpower_avg =
|
|
iwl_update_common_txpower(priv,
|
|
enhanced_txpower, section,
|
|
element,
|
|
&max_txpower_in_half_dbm);
|
|
else
|
|
max_txpower_avg =
|
|
iwl_update_channel_txpower(priv,
|
|
enhanced_txpower, section,
|
|
element,
|
|
&max_txpower_in_half_dbm);
|
|
|
|
/* Update the tx_power_user_lmt to the highest power
|
|
* supported by any channel */
|
|
if (max_txpower_avg > priv->tx_power_user_lmt)
|
|
priv->tx_power_user_lmt = max_txpower_avg;
|
|
|
|
/*
|
|
* Update the tx_power_lmt_in_half_dbm to
|
|
* the highest power supported by any channel
|
|
*/
|
|
if (max_txpower_in_half_dbm >
|
|
priv->tx_power_lmt_in_half_dbm)
|
|
priv->tx_power_lmt_in_half_dbm =
|
|
max_txpower_in_half_dbm;
|
|
}
|
|
}
|
|
}
|