diff options
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c | 454 |
1 files changed, 454 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c b/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c new file mode 100644 index 00000000000..a650baba080 --- /dev/null +++ b/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c @@ -0,0 +1,454 @@ +/****************************************************************************** + * + * 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; + } + } +} |