/****************************************************************************** * * 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 - 2011 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 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 2005 - 2011 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 #include #include #include #include #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); if (!priv->cfg->sku) { /* not using sku overwrite */ 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_RX_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); } }