| /****************************************************************************** |
| * |
| * 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); |
| } |
| } |