155 lines
5.1 KiB
C
155 lines
5.1 KiB
C
/******************************************************************************
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
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* USA
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*
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* The full GNU General Public License is included in this distribution
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* in the file called LICENSE.GPL.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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* BSD LICENSE
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*
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* Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <net/mac80211.h>
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#include "iwl-commands.h"
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#include "iwl-dev.h"
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#include "iwl-core.h"
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#include "iwl-debug.h"
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#include "iwl-4965.h"
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#include "iwl-io.h"
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/******************************************************************************
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*
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* EEPROM related functions
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*
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******************************************************************************/
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/*
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* The device's EEPROM semaphore prevents conflicts between driver and uCode
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* when accessing the EEPROM; each access is a series of pulses to/from the
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* EEPROM chip, not a single event, so even reads could conflict if they
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* weren't arbitrated by the semaphore.
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*/
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int iwl4965_eeprom_acquire_semaphore(struct iwl_priv *priv)
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{
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u16 count;
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int ret;
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for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
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/* Request semaphore */
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iwl_legacy_set_bit(priv, CSR_HW_IF_CONFIG_REG,
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CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
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/* See if we got it */
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ret = iwl_poll_bit(priv, CSR_HW_IF_CONFIG_REG,
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CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
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CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM,
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EEPROM_SEM_TIMEOUT);
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if (ret >= 0) {
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IWL_DEBUG_IO(priv,
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"Acquired semaphore after %d tries.\n",
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count+1);
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return ret;
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}
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}
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return ret;
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}
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void iwl4965_eeprom_release_semaphore(struct iwl_priv *priv)
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{
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iwl_legacy_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
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CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
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}
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int iwl4965_eeprom_check_version(struct iwl_priv *priv)
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{
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u16 eeprom_ver;
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u16 calib_ver;
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eeprom_ver = iwl_legacy_eeprom_query16(priv, EEPROM_VERSION);
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calib_ver = iwl_legacy_eeprom_query16(priv,
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EEPROM_4965_CALIB_VERSION_OFFSET);
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if (eeprom_ver < priv->cfg->eeprom_ver ||
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calib_ver < priv->cfg->eeprom_calib_ver)
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goto err;
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IWL_INFO(priv, "device EEPROM VER=0x%x, CALIB=0x%x\n",
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eeprom_ver, calib_ver);
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return 0;
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err:
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IWL_ERR(priv, "Unsupported (too old) EEPROM VER=0x%x < 0x%x "
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"CALIB=0x%x < 0x%x\n",
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eeprom_ver, priv->cfg->eeprom_ver,
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calib_ver, priv->cfg->eeprom_calib_ver);
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return -EINVAL;
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}
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void iwl4965_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
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{
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const u8 *addr = iwl_legacy_eeprom_query_addr(priv,
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EEPROM_MAC_ADDRESS);
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memcpy(mac, addr, ETH_ALEN);
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}
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