3ac7f14694
This patch fixes errors reported by checkpatch in iwlwifi drivers Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
605 lines
18 KiB
C
605 lines
18 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 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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* Tomas Winkler <tomas.winkler@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 - 2008 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/version.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-eeprom.h"
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#include "iwl-io.h"
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/************************** EEPROM BANDS ****************************
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*
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* The iwl_eeprom_band definitions below provide the mapping from the
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* EEPROM contents to the specific channel number supported for each
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* band.
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*
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* For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
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* definition below maps to physical channel 42 in the 5.2GHz spectrum.
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* The specific geography and calibration information for that channel
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* is contained in the eeprom map itself.
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*
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* During init, we copy the eeprom information and channel map
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* information into priv->channel_info_24/52 and priv->channel_map_24/52
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*
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* channel_map_24/52 provides the index in the channel_info array for a
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* given channel. We have to have two separate maps as there is channel
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* overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
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* band_2
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*
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* A value of 0xff stored in the channel_map indicates that the channel
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* is not supported by the hardware at all.
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*
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* A value of 0xfe in the channel_map indicates that the channel is not
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* valid for Tx with the current hardware. This means that
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* while the system can tune and receive on a given channel, it may not
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* be able to associate or transmit any frames on that
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* channel. There is no corresponding channel information for that
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* entry.
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*
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*********************************************************************/
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/* 2.4 GHz */
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const u8 iwl_eeprom_band_1[14] = {
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1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
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};
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/* 5.2 GHz bands */
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static const u8 iwl_eeprom_band_2[] = { /* 4915-5080MHz */
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183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
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};
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static const u8 iwl_eeprom_band_3[] = { /* 5170-5320MHz */
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34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
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};
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static const u8 iwl_eeprom_band_4[] = { /* 5500-5700MHz */
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100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
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};
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static const u8 iwl_eeprom_band_5[] = { /* 5725-5825MHz */
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145, 149, 153, 157, 161, 165
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};
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static const u8 iwl_eeprom_band_6[] = { /* 2.4 FAT channel */
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1, 2, 3, 4, 5, 6, 7
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};
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static const u8 iwl_eeprom_band_7[] = { /* 5.2 FAT channel */
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36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
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};
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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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int iwlcore_eeprom_verify_signature(struct iwl_priv *priv)
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{
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u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
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if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
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IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
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return -ENOENT;
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}
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return 0;
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}
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EXPORT_SYMBOL(iwlcore_eeprom_verify_signature);
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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 iwlcore_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_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("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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EXPORT_SYMBOL(iwlcore_eeprom_acquire_semaphore);
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void iwlcore_eeprom_release_semaphore(struct iwl_priv *priv)
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{
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iwl_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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EXPORT_SYMBOL(iwlcore_eeprom_release_semaphore);
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const u8 *iwlcore_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
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{
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BUG_ON(offset >= priv->cfg->eeprom_size);
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return &priv->eeprom[offset];
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}
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EXPORT_SYMBOL(iwlcore_eeprom_query_addr);
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/**
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* iwl_eeprom_init - read EEPROM contents
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*
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* Load the EEPROM contents from adapter into priv->eeprom
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*
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* NOTE: This routine uses the non-debug IO access functions.
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*/
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int iwl_eeprom_init(struct iwl_priv *priv)
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{
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u16 *e;
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u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
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u32 r;
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int sz = priv->cfg->eeprom_size;
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int ret;
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int i;
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u16 addr;
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/* allocate eeprom */
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priv->eeprom = kzalloc(sz, GFP_KERNEL);
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if (!priv->eeprom) {
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ret = -ENOMEM;
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goto alloc_err;
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}
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e = (u16 *)priv->eeprom;
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ret = priv->cfg->ops->lib->eeprom_ops.verify_signature(priv);
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if (ret < 0) {
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IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
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ret = -ENOENT;
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goto err;
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}
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/* Make sure driver (instead of uCode) is allowed to read EEPROM */
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ret = priv->cfg->ops->lib->eeprom_ops.acquire_semaphore(priv);
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if (ret < 0) {
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IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
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ret = -ENOENT;
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goto err;
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}
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/* eeprom is an array of 16bit values */
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for (addr = 0; addr < sz; addr += sizeof(u16)) {
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_iwl_write32(priv, CSR_EEPROM_REG, addr << 1);
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_iwl_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);
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for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
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i += IWL_EEPROM_ACCESS_DELAY) {
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r = _iwl_read_direct32(priv, CSR_EEPROM_REG);
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if (r & CSR_EEPROM_REG_READ_VALID_MSK)
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break;
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udelay(IWL_EEPROM_ACCESS_DELAY);
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}
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if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
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IWL_ERROR("Time out reading EEPROM[%d]", addr);
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ret = -ETIMEDOUT;
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goto done;
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}
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e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
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}
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ret = 0;
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done:
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priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);
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err:
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if (ret)
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kfree(priv->eeprom);
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alloc_err:
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return ret;
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}
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EXPORT_SYMBOL(iwl_eeprom_init);
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void iwl_eeprom_free(struct iwl_priv *priv)
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{
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kfree(priv->eeprom);
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priv->eeprom = NULL;
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}
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EXPORT_SYMBOL(iwl_eeprom_free);
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int iwl_eeprom_check_version(struct iwl_priv *priv)
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{
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return priv->cfg->ops->lib->eeprom_ops.check_version(priv);
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}
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EXPORT_SYMBOL(iwl_eeprom_check_version);
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const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
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{
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return priv->cfg->ops->lib->eeprom_ops.query_addr(priv, offset);
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}
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EXPORT_SYMBOL(iwl_eeprom_query_addr);
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u16 iwl_eeprom_query16(const struct iwl_priv *priv, size_t offset)
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{
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return (u16)priv->eeprom[offset] | ((u16)priv->eeprom[offset + 1] << 8);
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}
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EXPORT_SYMBOL(iwl_eeprom_query16);
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void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
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{
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const u8 *addr = priv->cfg->ops->lib->eeprom_ops.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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EXPORT_SYMBOL(iwl_eeprom_get_mac);
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static void iwl_init_band_reference(const struct iwl_priv *priv,
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int eep_band, int *eeprom_ch_count,
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const struct iwl_eeprom_channel **eeprom_ch_info,
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const u8 **eeprom_ch_index)
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{
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u32 offset = priv->cfg->ops->lib->
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eeprom_ops.regulatory_bands[eep_band - 1];
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switch (eep_band) {
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case 1: /* 2.4GHz band */
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*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
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*eeprom_ch_info = (struct iwl_eeprom_channel *)
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iwl_eeprom_query_addr(priv, offset);
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*eeprom_ch_index = iwl_eeprom_band_1;
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break;
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case 2: /* 4.9GHz band */
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*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
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*eeprom_ch_info = (struct iwl_eeprom_channel *)
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iwl_eeprom_query_addr(priv, offset);
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*eeprom_ch_index = iwl_eeprom_band_2;
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break;
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case 3: /* 5.2GHz band */
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*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
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*eeprom_ch_info = (struct iwl_eeprom_channel *)
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iwl_eeprom_query_addr(priv, offset);
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*eeprom_ch_index = iwl_eeprom_band_3;
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break;
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case 4: /* 5.5GHz band */
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*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
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*eeprom_ch_info = (struct iwl_eeprom_channel *)
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iwl_eeprom_query_addr(priv, offset);
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*eeprom_ch_index = iwl_eeprom_band_4;
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break;
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case 5: /* 5.7GHz band */
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*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
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*eeprom_ch_info = (struct iwl_eeprom_channel *)
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iwl_eeprom_query_addr(priv, offset);
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*eeprom_ch_index = iwl_eeprom_band_5;
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break;
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case 6: /* 2.4GHz FAT channels */
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*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
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*eeprom_ch_info = (struct iwl_eeprom_channel *)
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iwl_eeprom_query_addr(priv, offset);
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*eeprom_ch_index = iwl_eeprom_band_6;
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break;
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case 7: /* 5 GHz FAT channels */
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*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
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*eeprom_ch_info = (struct iwl_eeprom_channel *)
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iwl_eeprom_query_addr(priv, offset);
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*eeprom_ch_index = iwl_eeprom_band_7;
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break;
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default:
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BUG();
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return;
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}
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}
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#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
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? # x " " : "")
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/**
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* iwl_set_fat_chan_info - Copy fat channel info into driver's priv.
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*
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* Does not set up a command, or touch hardware.
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*/
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static int iwl_set_fat_chan_info(struct iwl_priv *priv,
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enum ieee80211_band band, u16 channel,
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const struct iwl_eeprom_channel *eeprom_ch,
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u8 fat_extension_channel)
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{
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struct iwl_channel_info *ch_info;
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ch_info = (struct iwl_channel_info *)
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iwl_get_channel_info(priv, band, channel);
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if (!is_channel_valid(ch_info))
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return -1;
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IWL_DEBUG_INFO("FAT Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
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" Ad-Hoc %ssupported\n",
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ch_info->channel,
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is_channel_a_band(ch_info) ?
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"5.2" : "2.4",
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CHECK_AND_PRINT(IBSS),
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CHECK_AND_PRINT(ACTIVE),
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CHECK_AND_PRINT(RADAR),
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CHECK_AND_PRINT(WIDE),
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CHECK_AND_PRINT(DFS),
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eeprom_ch->flags,
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eeprom_ch->max_power_avg,
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((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
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&& !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
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"" : "not ");
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ch_info->fat_eeprom = *eeprom_ch;
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ch_info->fat_max_power_avg = eeprom_ch->max_power_avg;
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ch_info->fat_curr_txpow = eeprom_ch->max_power_avg;
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ch_info->fat_min_power = 0;
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ch_info->fat_scan_power = eeprom_ch->max_power_avg;
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ch_info->fat_flags = eeprom_ch->flags;
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ch_info->fat_extension_channel = fat_extension_channel;
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return 0;
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}
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#define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
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? # x " " : "")
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/**
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* iwl_init_channel_map - Set up driver's info for all possible channels
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*/
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int iwl_init_channel_map(struct iwl_priv *priv)
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{
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int eeprom_ch_count = 0;
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const u8 *eeprom_ch_index = NULL;
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const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
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int band, ch;
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struct iwl_channel_info *ch_info;
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if (priv->channel_count) {
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IWL_DEBUG_INFO("Channel map already initialized.\n");
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return 0;
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}
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IWL_DEBUG_INFO("Initializing regulatory info from EEPROM\n");
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priv->channel_count =
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ARRAY_SIZE(iwl_eeprom_band_1) +
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ARRAY_SIZE(iwl_eeprom_band_2) +
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ARRAY_SIZE(iwl_eeprom_band_3) +
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ARRAY_SIZE(iwl_eeprom_band_4) +
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ARRAY_SIZE(iwl_eeprom_band_5);
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IWL_DEBUG_INFO("Parsing data for %d channels.\n", priv->channel_count);
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priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
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priv->channel_count, GFP_KERNEL);
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if (!priv->channel_info) {
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IWL_ERROR("Could not allocate channel_info\n");
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priv->channel_count = 0;
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return -ENOMEM;
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}
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ch_info = priv->channel_info;
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/* Loop through the 5 EEPROM bands adding them in order to the
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* channel map we maintain (that contains additional information than
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* what just in the EEPROM) */
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for (band = 1; band <= 5; band++) {
|
|
|
|
iwl_init_band_reference(priv, band, &eeprom_ch_count,
|
|
&eeprom_ch_info, &eeprom_ch_index);
|
|
|
|
/* Loop through each band adding each of the channels */
|
|
for (ch = 0; ch < eeprom_ch_count; ch++) {
|
|
ch_info->channel = eeprom_ch_index[ch];
|
|
ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
|
|
IEEE80211_BAND_5GHZ;
|
|
|
|
/* permanently store EEPROM's channel regulatory flags
|
|
* and max power in channel info database. */
|
|
ch_info->eeprom = eeprom_ch_info[ch];
|
|
|
|
/* Copy the run-time flags so they are there even on
|
|
* invalid channels */
|
|
ch_info->flags = eeprom_ch_info[ch].flags;
|
|
/* First write that fat is not enabled, and then enable
|
|
* one by one */
|
|
ch_info->fat_extension_channel =
|
|
(IEEE80211_CHAN_NO_FAT_ABOVE |
|
|
IEEE80211_CHAN_NO_FAT_BELOW);
|
|
|
|
if (!(is_channel_valid(ch_info))) {
|
|
IWL_DEBUG_INFO("Ch. %d Flags %x [%sGHz] - "
|
|
"No traffic\n",
|
|
ch_info->channel,
|
|
ch_info->flags,
|
|
is_channel_a_band(ch_info) ?
|
|
"5.2" : "2.4");
|
|
ch_info++;
|
|
continue;
|
|
}
|
|
|
|
/* Initialize regulatory-based run-time data */
|
|
ch_info->max_power_avg = ch_info->curr_txpow =
|
|
eeprom_ch_info[ch].max_power_avg;
|
|
ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
|
|
ch_info->min_power = 0;
|
|
|
|
IWL_DEBUG_INFO("Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x %ddBm):"
|
|
" Ad-Hoc %ssupported\n",
|
|
ch_info->channel,
|
|
is_channel_a_band(ch_info) ?
|
|
"5.2" : "2.4",
|
|
CHECK_AND_PRINT_I(VALID),
|
|
CHECK_AND_PRINT_I(IBSS),
|
|
CHECK_AND_PRINT_I(ACTIVE),
|
|
CHECK_AND_PRINT_I(RADAR),
|
|
CHECK_AND_PRINT_I(WIDE),
|
|
CHECK_AND_PRINT_I(DFS),
|
|
eeprom_ch_info[ch].flags,
|
|
eeprom_ch_info[ch].max_power_avg,
|
|
((eeprom_ch_info[ch].
|
|
flags & EEPROM_CHANNEL_IBSS)
|
|
&& !(eeprom_ch_info[ch].
|
|
flags & EEPROM_CHANNEL_RADAR))
|
|
? "" : "not ");
|
|
|
|
/* Set the user_txpower_limit to the highest power
|
|
* supported by any channel */
|
|
if (eeprom_ch_info[ch].max_power_avg >
|
|
priv->tx_power_user_lmt)
|
|
priv->tx_power_user_lmt =
|
|
eeprom_ch_info[ch].max_power_avg;
|
|
|
|
ch_info++;
|
|
}
|
|
}
|
|
|
|
/* Two additional EEPROM bands for 2.4 and 5 GHz FAT channels */
|
|
for (band = 6; band <= 7; band++) {
|
|
enum ieee80211_band ieeeband;
|
|
u8 fat_extension_chan;
|
|
|
|
iwl_init_band_reference(priv, band, &eeprom_ch_count,
|
|
&eeprom_ch_info, &eeprom_ch_index);
|
|
|
|
/* EEPROM band 6 is 2.4, band 7 is 5 GHz */
|
|
ieeeband =
|
|
(band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
|
|
|
|
/* Loop through each band adding each of the channels */
|
|
for (ch = 0; ch < eeprom_ch_count; ch++) {
|
|
|
|
if ((band == 6) &&
|
|
((eeprom_ch_index[ch] == 5) ||
|
|
(eeprom_ch_index[ch] == 6) ||
|
|
(eeprom_ch_index[ch] == 7)))
|
|
/* both are allowed: above and below */
|
|
fat_extension_chan = 0;
|
|
else
|
|
fat_extension_chan =
|
|
IEEE80211_CHAN_NO_FAT_BELOW;
|
|
|
|
/* Set up driver's info for lower half */
|
|
iwl_set_fat_chan_info(priv, ieeeband,
|
|
eeprom_ch_index[ch],
|
|
&(eeprom_ch_info[ch]),
|
|
fat_extension_chan);
|
|
|
|
/* Set up driver's info for upper half */
|
|
iwl_set_fat_chan_info(priv, ieeeband,
|
|
(eeprom_ch_index[ch] + 4),
|
|
&(eeprom_ch_info[ch]),
|
|
IEEE80211_CHAN_NO_FAT_ABOVE);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(iwl_init_channel_map);
|
|
|
|
/*
|
|
* iwl_free_channel_map - undo allocations in iwl_init_channel_map
|
|
*/
|
|
void iwl_free_channel_map(struct iwl_priv *priv)
|
|
{
|
|
kfree(priv->channel_info);
|
|
priv->channel_count = 0;
|
|
}
|
|
|
|
/**
|
|
* iwl_get_channel_info - Find driver's private channel info
|
|
*
|
|
* Based on band and channel number.
|
|
*/
|
|
const struct iwl_channel_info *iwl_get_channel_info(const struct iwl_priv *priv,
|
|
enum ieee80211_band band, u16 channel)
|
|
{
|
|
int i;
|
|
|
|
switch (band) {
|
|
case IEEE80211_BAND_5GHZ:
|
|
for (i = 14; i < priv->channel_count; i++) {
|
|
if (priv->channel_info[i].channel == channel)
|
|
return &priv->channel_info[i];
|
|
}
|
|
break;
|
|
case IEEE80211_BAND_2GHZ:
|
|
if (channel >= 1 && channel <= 14)
|
|
return &priv->channel_info[channel - 1];
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(iwl_get_channel_info);
|
|
|