338 lines
11 KiB
C
338 lines
11 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 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;
|
|
|
|
}
|
|
|
|
int iwl_eeprom_check_sku(struct iwl_priv *priv)
|
|
{
|
|
u16 eeprom_sku;
|
|
u16 radio_cfg;
|
|
|
|
eeprom_sku = iwl_eeprom_query16(priv, EEPROM_SKU_CAP);
|
|
|
|
priv->cfg->sku = ((eeprom_sku & EEPROM_SKU_CAP_BAND_SELECTION) >>
|
|
EEPROM_SKU_CAP_BAND_POS);
|
|
if (eeprom_sku & EEPROM_SKU_CAP_11N_ENABLE)
|
|
priv->cfg->sku |= IWL_SKU_N;
|
|
|
|
if (!priv->cfg->sku) {
|
|
IWL_ERR(priv, "Invalid device sku\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
IWL_INFO(priv, "Device SKU: 0X%x\n", priv->cfg->sku);
|
|
|
|
if (!priv->cfg->valid_tx_ant && !priv->cfg->valid_rx_ant) {
|
|
/* not using .cfg overwrite */
|
|
radio_cfg = iwl_eeprom_query16(priv, EEPROM_RADIO_CONFIG);
|
|
priv->cfg->valid_tx_ant = EEPROM_RF_CFG_TX_ANT_MSK(radio_cfg);
|
|
priv->cfg->valid_rx_ant = EEPROM_RF_CFG_TX_ANT_MSK(radio_cfg);
|
|
if (!priv->cfg->valid_tx_ant || !priv->cfg->valid_rx_ant) {
|
|
IWL_ERR(priv, "Invalid chain (0X%x, 0X%x)\n",
|
|
priv->cfg->valid_tx_ant,
|
|
priv->cfg->valid_rx_ant);
|
|
return -EINVAL;
|
|
}
|
|
IWL_INFO(priv, "Valid Tx ant: 0X%x, Valid Rx ant: 0X%x\n",
|
|
priv->cfg->valid_tx_ant, priv->cfg->valid_rx_ant);
|
|
}
|
|
/*
|
|
* for some special cases,
|
|
* EEPROM did not reflect the correct antenna setting
|
|
* so overwrite the valid tx/rx antenna from .cfg
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
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) */
|
|
|
|
/* 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);
|
|
}
|
|
|
|
static void
|
|
iwlcore_eeprom_enh_txp_read_element(struct iwl_priv *priv,
|
|
struct iwl_eeprom_enhanced_txpwr *txp,
|
|
s8 max_txpower_avg)
|
|
{
|
|
int ch_idx;
|
|
bool is_ht40 = txp->flags & IWL_EEPROM_ENH_TXP_FL_40MHZ;
|
|
enum ieee80211_band band;
|
|
|
|
band = txp->flags & IWL_EEPROM_ENH_TXP_FL_BAND_52G ?
|
|
IEEE80211_BAND_5GHZ : IEEE80211_BAND_2GHZ;
|
|
|
|
for (ch_idx = 0; ch_idx < priv->channel_count; ch_idx++) {
|
|
struct iwl_channel_info *ch_info = &priv->channel_info[ch_idx];
|
|
|
|
/* update matching channel or from common data only */
|
|
if (txp->channel != 0 && ch_info->channel != txp->channel)
|
|
continue;
|
|
|
|
/* update matching band only */
|
|
if (band != ch_info->band)
|
|
continue;
|
|
|
|
if (ch_info->max_power_avg < max_txpower_avg && !is_ht40) {
|
|
ch_info->max_power_avg = max_txpower_avg;
|
|
ch_info->curr_txpow = max_txpower_avg;
|
|
ch_info->scan_power = max_txpower_avg;
|
|
}
|
|
|
|
if (is_ht40 && ch_info->ht40_max_power_avg < max_txpower_avg)
|
|
ch_info->ht40_max_power_avg = max_txpower_avg;
|
|
}
|
|
}
|
|
|
|
#define EEPROM_TXP_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT)
|
|
#define EEPROM_TXP_ENTRY_LEN sizeof(struct iwl_eeprom_enhanced_txpwr)
|
|
#define EEPROM_TXP_SZ_OFFS (0x00 | INDIRECT_ADDRESS | INDIRECT_TXP_LIMIT_SIZE)
|
|
|
|
#define TXP_CHECK_AND_PRINT(x) ((txp->flags & IWL_EEPROM_ENH_TXP_FL_##x) \
|
|
? # x " " : "")
|
|
|
|
void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
|
|
{
|
|
struct iwl_eeprom_enhanced_txpwr *txp_array, *txp;
|
|
int idx, entries;
|
|
__le16 *txp_len;
|
|
s8 max_txp_avg, max_txp_avg_halfdbm;
|
|
|
|
BUILD_BUG_ON(sizeof(struct iwl_eeprom_enhanced_txpwr) != 8);
|
|
|
|
/* the length is in 16-bit words, but we want entries */
|
|
txp_len = (__le16 *) iwlagn_eeprom_query_addr(priv, EEPROM_TXP_SZ_OFFS);
|
|
entries = le16_to_cpup(txp_len) * 2 / EEPROM_TXP_ENTRY_LEN;
|
|
|
|
txp_array = (void *) iwlagn_eeprom_query_addr(priv, EEPROM_TXP_OFFS);
|
|
|
|
for (idx = 0; idx < entries; idx++) {
|
|
txp = &txp_array[idx];
|
|
/* skip invalid entries */
|
|
if (!(txp->flags & IWL_EEPROM_ENH_TXP_FL_VALID))
|
|
continue;
|
|
|
|
IWL_DEBUG_EEPROM(priv, "%s %d:\t %s%s%s%s%s%s%s%s (0x%02x)\n",
|
|
(txp->channel && (txp->flags &
|
|
IWL_EEPROM_ENH_TXP_FL_COMMON_TYPE)) ?
|
|
"Common " : (txp->channel) ?
|
|
"Channel" : "Common",
|
|
(txp->channel),
|
|
TXP_CHECK_AND_PRINT(VALID),
|
|
TXP_CHECK_AND_PRINT(BAND_52G),
|
|
TXP_CHECK_AND_PRINT(OFDM),
|
|
TXP_CHECK_AND_PRINT(40MHZ),
|
|
TXP_CHECK_AND_PRINT(HT_AP),
|
|
TXP_CHECK_AND_PRINT(RES1),
|
|
TXP_CHECK_AND_PRINT(RES2),
|
|
TXP_CHECK_AND_PRINT(COMMON_TYPE),
|
|
txp->flags);
|
|
IWL_DEBUG_EEPROM(priv, "\t\t chain_A: 0x%02x "
|
|
"chain_B: 0X%02x chain_C: 0X%02x\n",
|
|
txp->chain_a_max, txp->chain_b_max,
|
|
txp->chain_c_max);
|
|
IWL_DEBUG_EEPROM(priv, "\t\t MIMO2: 0x%02x "
|
|
"MIMO3: 0x%02x High 20_on_40: 0x%02x "
|
|
"Low 20_on_40: 0x%02x\n",
|
|
txp->mimo2_max, txp->mimo3_max,
|
|
((txp->delta_20_in_40 & 0xf0) >> 4),
|
|
(txp->delta_20_in_40 & 0x0f));
|
|
|
|
max_txp_avg = iwl_get_max_txpower_avg(priv, txp_array, idx,
|
|
&max_txp_avg_halfdbm);
|
|
|
|
/*
|
|
* Update the user limit values values to the highest
|
|
* power supported by any channel
|
|
*/
|
|
if (max_txp_avg > priv->tx_power_user_lmt)
|
|
priv->tx_power_user_lmt = max_txp_avg;
|
|
if (max_txp_avg_halfdbm > priv->tx_power_lmt_in_half_dbm)
|
|
priv->tx_power_lmt_in_half_dbm = max_txp_avg_halfdbm;
|
|
|
|
iwlcore_eeprom_enh_txp_read_element(priv, txp, max_txp_avg);
|
|
}
|
|
}
|