drivers/net/wireless/iwlwifi/iwl-eeprom.c - kernel/msm-4.9 - Gitiles

 /******************************************************************************
  *
  * 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 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:
  * Tomas Winkler <tomas.winkler@intel.com>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *
  * BSD LICENSE
  *
  * Copyright(c) 2005 - 2008 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/version.h>
 #include <linux/init.h>

 #include <net/mac80211.h>

 #include "iwl-4965-commands.h"
 #include "iwl-4965.h"
 #include "iwl-core.h"
 #include "iwl-4965-debug.h"
 #include "iwl-eeprom.h"
 #include "iwl-4965-io.h"

 /******************************************************************************
  *
  * EEPROM related functions
  *
 ******************************************************************************/

 int iwlcore_eeprom_verify_signature(struct iwl4965_priv *priv)
 {
 	u32 gp = iwl4965_read32(priv, CSR_EEPROM_GP);
 	if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
 		IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
 		return -ENOENT;
 	}
 	return 0;
 }
 EXPORT_SYMBOL(iwlcore_eeprom_verify_signature);

 /*
  * 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 iwl4965_priv *priv)
 {
 	u16 count;
 	int ret;

 	for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
 		/* Request semaphore */
 		iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
 			CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);

 		/* See if we got it */
 		ret = iwl4965_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("Acquired semaphore after %d tries.\n",
 				count+1);
 			return ret;
 		}
 	}

 	return ret;
 }
 EXPORT_SYMBOL(iwlcore_eeprom_acquire_semaphore);

 void iwlcore_eeprom_release_semaphore(struct iwl4965_priv *priv)
 {
 	iwl4965_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
 		CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);

 }
 EXPORT_SYMBOL(iwlcore_eeprom_release_semaphore);


 /**
  * iwl_eeprom_init - read EEPROM contents
  *
  * Load the EEPROM contents from adapter into priv->eeprom
  *
  * NOTE:  This routine uses the non-debug IO access functions.
  */
 int iwl_eeprom_init(struct iwl4965_priv *priv)
 {
 	u16 *e = (u16 *)&priv->eeprom;
 	u32 gp = iwl4965_read32(priv, CSR_EEPROM_GP);
 	u32 r;
 	int sz = sizeof(priv->eeprom);
 	int ret;
 	int i;
 	u16 addr;

 	/* The EEPROM structure has several padding buffers within it
 	 * and when adding new EEPROM maps is subject to programmer errors
 	 * which may be very difficult to identify without explicitly
 	 * checking the resulting size of the eeprom map. */
 	BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);

 	if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
 		IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
 		return -ENOENT;
 	}

 	/* Make sure driver (instead of uCode) is allowed to read EEPROM */
 	ret = priv->cfg->ops->lib->eeprom_ops.acquire_semaphore(priv);
 	if (ret < 0) {
 		IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
 		return -ENOENT;
 	}

 	/* eeprom is an array of 16bit values */
 	for (addr = 0; addr < sz; addr += sizeof(u16)) {
 		_iwl4965_write32(priv, CSR_EEPROM_REG, addr << 1);
 		_iwl4965_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);

 		for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
 					i += IWL_EEPROM_ACCESS_DELAY) {
 			r = _iwl4965_read_direct32(priv, CSR_EEPROM_REG);
 			if (r & CSR_EEPROM_REG_READ_VALID_MSK)
 				break;
 			udelay(IWL_EEPROM_ACCESS_DELAY);
 		}

 		if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
 			IWL_ERROR("Time out reading EEPROM[%d]", addr);
 			ret = -ETIMEDOUT;
 			goto done;
 		}
 		e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
 	}
 	ret = 0;

 done:
 	priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);
 	return ret;
 }
 EXPORT_SYMBOL(iwl_eeprom_init);


 void iwl_eeprom_get_mac(const struct iwl4965_priv *priv, u8 *mac)
 {
 	memcpy(mac, priv->eeprom.mac_address, 6);
 }
 EXPORT_SYMBOL(iwl_eeprom_get_mac);
	/******************************************************************************
	*
	* 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 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:
	* Tomas Winkler <tomas.winkler@intel.com>
	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	*
	* BSD LICENSE
	*
	* Copyright(c) 2005 - 2008 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/version.h>
	#include <linux/init.h>

	#include <net/mac80211.h>

	#include "iwl-4965-commands.h"
	#include "iwl-4965.h"
	#include "iwl-core.h"
	#include "iwl-4965-debug.h"
	#include "iwl-eeprom.h"
	#include "iwl-4965-io.h"

	/******************************************************************************
	*
	* EEPROM related functions
	*
	******************************************************************************/

	int iwlcore_eeprom_verify_signature(struct iwl4965_priv *priv)
	{
	u32 gp = iwl4965_read32(priv, CSR_EEPROM_GP);
	if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
	IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
	return -ENOENT;
	}
	return 0;
	}
	EXPORT_SYMBOL(iwlcore_eeprom_verify_signature);

	/*
	* 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 iwl4965_priv *priv)
	{
	u16 count;
	int ret;

	for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
	/* Request semaphore */
	iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG,
	CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);

	/* See if we got it */
	ret = iwl4965_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("Acquired semaphore after %d tries.\n",
	count+1);
	return ret;
	}
	}

	return ret;
	}
	EXPORT_SYMBOL(iwlcore_eeprom_acquire_semaphore);

	void iwlcore_eeprom_release_semaphore(struct iwl4965_priv *priv)
	{
	iwl4965_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
	CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);

	}
	EXPORT_SYMBOL(iwlcore_eeprom_release_semaphore);


	/**
	* iwl_eeprom_init - read EEPROM contents
	*
	* Load the EEPROM contents from adapter into priv->eeprom
	*
	* NOTE: This routine uses the non-debug IO access functions.
	*/
	int iwl_eeprom_init(struct iwl4965_priv *priv)
	{
	u16 e = (u16 )&priv->eeprom;
	u32 gp = iwl4965_read32(priv, CSR_EEPROM_GP);
	u32 r;
	int sz = sizeof(priv->eeprom);
	int ret;
	int i;
	u16 addr;

	/* The EEPROM structure has several padding buffers within it
	* and when adding new EEPROM maps is subject to programmer errors
	* which may be very difficult to identify without explicitly
	* checking the resulting size of the eeprom map. */
	BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE);

	if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
	IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
	return -ENOENT;
	}

	/* Make sure driver (instead of uCode) is allowed to read EEPROM */
	ret = priv->cfg->ops->lib->eeprom_ops.acquire_semaphore(priv);
	if (ret < 0) {
	IWL_ERROR("Failed to acquire EEPROM semaphore.\n");
	return -ENOENT;
	}

	/* eeprom is an array of 16bit values */
	for (addr = 0; addr < sz; addr += sizeof(u16)) {
	_iwl4965_write32(priv, CSR_EEPROM_REG, addr << 1);
	_iwl4965_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD);

	for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT;
	i += IWL_EEPROM_ACCESS_DELAY) {
	r = _iwl4965_read_direct32(priv, CSR_EEPROM_REG);
	if (r & CSR_EEPROM_REG_READ_VALID_MSK)
	break;
	udelay(IWL_EEPROM_ACCESS_DELAY);
	}

	if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) {
	IWL_ERROR("Time out reading EEPROM[%d]", addr);
	ret = -ETIMEDOUT;
	goto done;
	}
	e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
	}
	ret = 0;

	done:
	priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);
	return ret;
	}
	EXPORT_SYMBOL(iwl_eeprom_init);


	void iwl_eeprom_get_mac(const struct iwl4965_priv priv, u8 mac)
	{
	memcpy(mac, priv->eeprom.mac_address, 6);
	}
	EXPORT_SYMBOL(iwl_eeprom_get_mac);