drivers/net/wireless/intel/iwlwifi/iwl-phy-db.c - kernel/quantenna - Git at Google

 /******************************************************************************
  *
  * 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) 2007 - 2014 Intel Corporation. All rights reserved.
  * Copyright(c) 2016 Intel Deutschland GmbH
  *
  * 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 COPYING.
  *
  * Contact Information:
  *  Intel Linux Wireless <linuxwifi@intel.com>
  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  *
  * BSD LICENSE
  *
  * Copyright(c) 2005 - 2014 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/slab.h>
 #include <linux/string.h>
 #include <linux/export.h>

 #include "iwl-drv.h"
 #include "iwl-phy-db.h"
 #include "iwl-debug.h"
 #include "iwl-op-mode.h"
 #include "iwl-trans.h"

 #define CHANNEL_NUM_SIZE	4	/* num of channels in calib_ch size */

 struct iwl_phy_db_entry {
 	u16	size;
 	u8	*data;
 };

 /**
  * struct iwl_phy_db - stores phy configuration and calibration data.
  *
  * @cfg: phy configuration.
  * @calib_nch: non channel specific calibration data.
  * @calib_ch: channel specific calibration data.
  * @n_group_papd: number of entries in papd channel group.
  * @calib_ch_group_papd: calibration data related to papd channel group.
  * @n_group_txp: number of entries in tx power channel group.
  * @calib_ch_group_txp: calibration data related to tx power chanel group.
  */
 struct iwl_phy_db {
 	struct iwl_phy_db_entry	cfg;
 	struct iwl_phy_db_entry	calib_nch;
 	int n_group_papd;
 	struct iwl_phy_db_entry	*calib_ch_group_papd;
 	int n_group_txp;
 	struct iwl_phy_db_entry	*calib_ch_group_txp;

 	struct iwl_trans *trans;
 };

 enum iwl_phy_db_section_type {
 	IWL_PHY_DB_CFG = 1,
 	IWL_PHY_DB_CALIB_NCH,
 	IWL_PHY_DB_UNUSED,
 	IWL_PHY_DB_CALIB_CHG_PAPD,
 	IWL_PHY_DB_CALIB_CHG_TXP,
 	IWL_PHY_DB_MAX
 };

 #define PHY_DB_CMD 0x6c /* TEMP API - The actual is 0x8c */

 /*
  * phy db - configure operational ucode
  */
 struct iwl_phy_db_cmd {
 	__le16 type;
 	__le16 length;
 	u8 data[];
 } __packed;

 /* for parsing of tx power channel group data that comes from the firmware*/
 struct iwl_phy_db_chg_txp {
 	__le32 space;
 	__le16 max_channel_idx;
 } __packed;

 /*
  * phy db - Receive phy db chunk after calibrations
  */
 struct iwl_calib_res_notif_phy_db {
 	__le16 type;
 	__le16 length;
 	u8 data[];
 } __packed;

 struct iwl_phy_db *iwl_phy_db_init(struct iwl_trans *trans)
 {
 	struct iwl_phy_db *phy_db = kzalloc(sizeof(struct iwl_phy_db),
 					    GFP_KERNEL);

 	if (!phy_db)
 		return phy_db;

 	phy_db->trans = trans;

 	phy_db->n_group_txp = -1;
 	phy_db->n_group_papd = -1;

 	/* TODO: add default values of the phy db. */
 	return phy_db;
 }
 IWL_EXPORT_SYMBOL(iwl_phy_db_init);

 /*
  * get phy db section: returns a pointer to a phy db section specified by
  * type and channel group id.
  */
 static struct iwl_phy_db_entry *
 iwl_phy_db_get_section(struct iwl_phy_db *phy_db,
 		       enum iwl_phy_db_section_type type,
 		       u16 chg_id)
 {
 	if (!phy_db || type >= IWL_PHY_DB_MAX)
 		return NULL;

 	switch (type) {
 	case IWL_PHY_DB_CFG:
 		return &phy_db->cfg;
 	case IWL_PHY_DB_CALIB_NCH:
 		return &phy_db->calib_nch;
 	case IWL_PHY_DB_CALIB_CHG_PAPD:
 		if (chg_id >= phy_db->n_group_papd)
 			return NULL;
 		return &phy_db->calib_ch_group_papd[chg_id];
 	case IWL_PHY_DB_CALIB_CHG_TXP:
 		if (chg_id >= phy_db->n_group_txp)
 			return NULL;
 		return &phy_db->calib_ch_group_txp[chg_id];
 	default:
 		return NULL;
 	}
 	return NULL;
 }

 static void iwl_phy_db_free_section(struct iwl_phy_db *phy_db,
 				    enum iwl_phy_db_section_type type,
 				    u16 chg_id)
 {
 	struct iwl_phy_db_entry *entry =
 				iwl_phy_db_get_section(phy_db, type, chg_id);
 	if (!entry)
 		return;

 	kfree(entry->data);
 	entry->data = NULL;
 	entry->size = 0;
 }

 void iwl_phy_db_free(struct iwl_phy_db *phy_db)
 {
 	int i;

 	if (!phy_db)
 		return;

 	iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CFG, 0);
 	iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_NCH, 0);

 	for (i = 0; i < phy_db->n_group_papd; i++)
 		iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_PAPD, i);
 	kfree(phy_db->calib_ch_group_papd);

 	for (i = 0; i < phy_db->n_group_txp; i++)
 		iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_TXP, i);
 	kfree(phy_db->calib_ch_group_txp);

 	kfree(phy_db);
 }
 IWL_EXPORT_SYMBOL(iwl_phy_db_free);

 int iwl_phy_db_set_section(struct iwl_phy_db *phy_db,
 			   struct iwl_rx_packet *pkt)
 {
 	struct iwl_calib_res_notif_phy_db *phy_db_notif =
 			(struct iwl_calib_res_notif_phy_db *)pkt->data;
 	enum iwl_phy_db_section_type type = le16_to_cpu(phy_db_notif->type);
 	u16 size  = le16_to_cpu(phy_db_notif->length);
 	struct iwl_phy_db_entry *entry;
 	u16 chg_id = 0;

 	if (!phy_db)
 		return -EINVAL;

 	if (type == IWL_PHY_DB_CALIB_CHG_PAPD) {
 		chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
 		if (phy_db && !phy_db->calib_ch_group_papd) {
 			/*
 			 * Firmware sends the largest index first, so we can use
 			 * it to know how much we should allocate.
 			 */
 			phy_db->calib_ch_group_papd = kcalloc(chg_id + 1,
 							      sizeof(struct iwl_phy_db_entry),
 							      GFP_ATOMIC);
 			if (!phy_db->calib_ch_group_papd)
 				return -ENOMEM;
 			phy_db->n_group_papd = chg_id + 1;
 		}
 	} else if (type == IWL_PHY_DB_CALIB_CHG_TXP) {
 		chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
 		if (phy_db && !phy_db->calib_ch_group_txp) {
 			/*
 			 * Firmware sends the largest index first, so we can use
 			 * it to know how much we should allocate.
 			 */
 			phy_db->calib_ch_group_txp = kcalloc(chg_id + 1,
 							     sizeof(struct iwl_phy_db_entry),
 							     GFP_ATOMIC);
 			if (!phy_db->calib_ch_group_txp)
 				return -ENOMEM;
 			phy_db->n_group_txp = chg_id + 1;
 		}
 	}

 	entry = iwl_phy_db_get_section(phy_db, type, chg_id);
 	if (!entry)
 		return -EINVAL;

 	kfree(entry->data);
 	entry->data = kmemdup(phy_db_notif->data, size, GFP_ATOMIC);
 	if (!entry->data) {
 		entry->size = 0;
 		return -ENOMEM;
 	}

 	entry->size = size;

 	IWL_DEBUG_INFO(phy_db->trans,
 		       "%s(%d): [PHYDB]SET: Type %d , Size: %d\n",
 		       __func__, __LINE__, type, size);

 	return 0;
 }
 IWL_EXPORT_SYMBOL(iwl_phy_db_set_section);

 static int is_valid_channel(u16 ch_id)
 {
 	if (ch_id <= 14 ||
 	    (36 <= ch_id && ch_id <= 64 && ch_id % 4 == 0) ||
 	    (100 <= ch_id && ch_id <= 140 && ch_id % 4 == 0) ||
 	    (145 <= ch_id && ch_id <= 165 && ch_id % 4 == 1))
 		return 1;
 	return 0;
 }

 static u8 ch_id_to_ch_index(u16 ch_id)
 {
 	if (WARN_ON(!is_valid_channel(ch_id)))
 		return 0xff;

 	if (ch_id <= 14)
 		return ch_id - 1;
 	if (ch_id <= 64)
 		return (ch_id + 20) / 4;
 	if (ch_id <= 140)
 		return (ch_id - 12) / 4;
 	return (ch_id - 13) / 4;
 }


 static u16 channel_id_to_papd(u16 ch_id)
 {
 	if (WARN_ON(!is_valid_channel(ch_id)))
 		return 0xff;

 	if (1 <= ch_id && ch_id <= 14)
 		return 0;
 	if (36 <= ch_id && ch_id <= 64)
 		return 1;
 	if (100 <= ch_id && ch_id <= 140)
 		return 2;
 	return 3;
 }

 static u16 channel_id_to_txp(struct iwl_phy_db *phy_db, u16 ch_id)
 {
 	struct iwl_phy_db_chg_txp *txp_chg;
 	int i;
 	u8 ch_index = ch_id_to_ch_index(ch_id);
 	if (ch_index == 0xff)
 		return 0xff;

 	for (i = 0; i < phy_db->n_group_txp; i++) {
 		txp_chg = (void *)phy_db->calib_ch_group_txp[i].data;
 		if (!txp_chg)
 			return 0xff;
 		/*
 		 * Looking for the first channel group that its max channel is
 		 * higher then wanted channel.
 		 */
 		if (le16_to_cpu(txp_chg->max_channel_idx) >= ch_index)
 			return i;
 	}
 	return 0xff;
 }
 static
 int iwl_phy_db_get_section_data(struct iwl_phy_db *phy_db,
 				u32 type, u8 **data, u16 *size, u16 ch_id)
 {
 	struct iwl_phy_db_entry *entry;
 	u16 ch_group_id = 0;

 	if (!phy_db)
 		return -EINVAL;

 	/* find wanted channel group */
 	if (type == IWL_PHY_DB_CALIB_CHG_PAPD)
 		ch_group_id = channel_id_to_papd(ch_id);
 	else if (type == IWL_PHY_DB_CALIB_CHG_TXP)
 		ch_group_id = channel_id_to_txp(phy_db, ch_id);

 	entry = iwl_phy_db_get_section(phy_db, type, ch_group_id);
 	if (!entry)
 		return -EINVAL;

 	*data = entry->data;
 	*size = entry->size;

 	IWL_DEBUG_INFO(phy_db->trans,
 		       "%s(%d): [PHYDB] GET: Type %d , Size: %d\n",
 		       __func__, __LINE__, type, *size);

 	return 0;
 }

 static int iwl_send_phy_db_cmd(struct iwl_phy_db *phy_db, u16 type,
 			       u16 length, void *data)
 {
 	struct iwl_phy_db_cmd phy_db_cmd;
 	struct iwl_host_cmd cmd = {
 		.id = PHY_DB_CMD,
 	};

 	IWL_DEBUG_INFO(phy_db->trans,
 		       "Sending PHY-DB hcmd of type %d, of length %d\n",
 		       type, length);

 	/* Set phy db cmd variables */
 	phy_db_cmd.type = cpu_to_le16(type);
 	phy_db_cmd.length = cpu_to_le16(length);

 	/* Set hcmd variables */
 	cmd.data[0] = &phy_db_cmd;
 	cmd.len[0] = sizeof(struct iwl_phy_db_cmd);
 	cmd.data[1] = data;
 	cmd.len[1] = length;
 	cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;

 	return iwl_trans_send_cmd(phy_db->trans, &cmd);
 }

 static int iwl_phy_db_send_all_channel_groups(
 					struct iwl_phy_db *phy_db,
 					enum iwl_phy_db_section_type type,
 					u8 max_ch_groups)
 {
 	u16 i;
 	int err;
 	struct iwl_phy_db_entry *entry;

 	/* Send all the  channel specific groups to operational fw */
 	for (i = 0; i < max_ch_groups; i++) {
 		entry = iwl_phy_db_get_section(phy_db,
 					       type,
 					       i);
 		if (!entry)
 			return -EINVAL;

 		if (!entry->size)
 			continue;

 		/* Send the requested PHY DB section */
 		err = iwl_send_phy_db_cmd(phy_db,
 					  type,
 					  entry->size,
 					  entry->data);
 		if (err) {
 			IWL_ERR(phy_db->trans,
 				"Can't SEND phy_db section %d (%d), err %d\n",
 				type, i, err);
 			return err;
 		}

 		IWL_DEBUG_INFO(phy_db->trans,
 			       "Sent PHY_DB HCMD, type = %d num = %d\n",
 			       type, i);
 	}

 	return 0;
 }

 int iwl_send_phy_db_data(struct iwl_phy_db *phy_db)
 {
 	u8 *data = NULL;
 	u16 size = 0;
 	int err;

 	IWL_DEBUG_INFO(phy_db->trans,
 		       "Sending phy db data and configuration to runtime image\n");

 	/* Send PHY DB CFG section */
 	err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CFG,
 					  &data, &size, 0);
 	if (err) {
 		IWL_ERR(phy_db->trans, "Cannot get Phy DB cfg section\n");
 		return err;
 	}

 	err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CFG, size, data);
 	if (err) {
 		IWL_ERR(phy_db->trans,
 			"Cannot send HCMD of  Phy DB cfg section\n");
 		return err;
 	}

 	err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CALIB_NCH,
 					  &data, &size, 0);
 	if (err) {
 		IWL_ERR(phy_db->trans,
 			"Cannot get Phy DB non specific channel section\n");
 		return err;
 	}

 	err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CALIB_NCH, size, data);
 	if (err) {
 		IWL_ERR(phy_db->trans,
 			"Cannot send HCMD of Phy DB non specific channel section\n");
 		return err;
 	}

 	/* Send all the TXP channel specific data */
 	err = iwl_phy_db_send_all_channel_groups(phy_db,
 						 IWL_PHY_DB_CALIB_CHG_PAPD,
 						 phy_db->n_group_papd);
 	if (err) {
 		IWL_ERR(phy_db->trans,
 			"Cannot send channel specific PAPD groups\n");
 		return err;
 	}

 	/* Send all the TXP channel specific data */
 	err = iwl_phy_db_send_all_channel_groups(phy_db,
 						 IWL_PHY_DB_CALIB_CHG_TXP,
 						 phy_db->n_group_txp);
 	if (err) {
 		IWL_ERR(phy_db->trans,
 			"Cannot send channel specific TX power groups\n");
 		return err;
 	}

 	IWL_DEBUG_INFO(phy_db->trans,
 		       "Finished sending phy db non channel data\n");
 	return 0;
 }
 IWL_EXPORT_SYMBOL(iwl_send_phy_db_data);
	/******************************************************************************
	*
	* 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) 2007 - 2014 Intel Corporation. All rights reserved.
	* Copyright(c) 2016 Intel Deutschland GmbH
	*
	* 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 COPYING.
	*
	* Contact Information:
	* Intel Linux Wireless <linuxwifi@intel.com>
	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	*
	* BSD LICENSE
	*
	* Copyright(c) 2005 - 2014 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/slab.h>
	#include <linux/string.h>
	#include <linux/export.h>

	#include "iwl-drv.h"
	#include "iwl-phy-db.h"
	#include "iwl-debug.h"
	#include "iwl-op-mode.h"
	#include "iwl-trans.h"

	#define CHANNEL_NUM_SIZE 4 /* num of channels in calib_ch size */

	struct iwl_phy_db_entry {
	u16 size;
	u8 *data;
	};

	/**
	* struct iwl_phy_db - stores phy configuration and calibration data.
	*
	* @cfg: phy configuration.
	* @calib_nch: non channel specific calibration data.
	* @calib_ch: channel specific calibration data.
	* @n_group_papd: number of entries in papd channel group.
	* @calib_ch_group_papd: calibration data related to papd channel group.
	* @n_group_txp: number of entries in tx power channel group.
	* @calib_ch_group_txp: calibration data related to tx power chanel group.
	*/
	struct iwl_phy_db {
	struct iwl_phy_db_entry cfg;
	struct iwl_phy_db_entry calib_nch;
	int n_group_papd;
	struct iwl_phy_db_entry *calib_ch_group_papd;
	int n_group_txp;
	struct iwl_phy_db_entry *calib_ch_group_txp;

	struct iwl_trans *trans;
	};

	enum iwl_phy_db_section_type {
	IWL_PHY_DB_CFG = 1,
	IWL_PHY_DB_CALIB_NCH,
	IWL_PHY_DB_UNUSED,
	IWL_PHY_DB_CALIB_CHG_PAPD,
	IWL_PHY_DB_CALIB_CHG_TXP,
	IWL_PHY_DB_MAX
	};

	#define PHY_DB_CMD 0x6c /* TEMP API - The actual is 0x8c */

	/*
	* phy db - configure operational ucode
	*/
	struct iwl_phy_db_cmd {
	__le16 type;
	__le16 length;
	u8 data[];
	} __packed;

	/* for parsing of tx power channel group data that comes from the firmware*/
	struct iwl_phy_db_chg_txp {
	__le32 space;
	__le16 max_channel_idx;
	} __packed;

	/*
	* phy db - Receive phy db chunk after calibrations
	*/
	struct iwl_calib_res_notif_phy_db {
	__le16 type;
	__le16 length;
	u8 data[];
	} __packed;

	struct iwl_phy_db iwl_phy_db_init(struct iwl_trans trans)
	{
	struct iwl_phy_db *phy_db = kzalloc(sizeof(struct iwl_phy_db),
	GFP_KERNEL);

	if (!phy_db)
	return phy_db;

	phy_db->trans = trans;

	phy_db->n_group_txp = -1;
	phy_db->n_group_papd = -1;

	/* TODO: add default values of the phy db. */
	return phy_db;
	}
	IWL_EXPORT_SYMBOL(iwl_phy_db_init);

	/*
	* get phy db section: returns a pointer to a phy db section specified by
	* type and channel group id.
	*/
	static struct iwl_phy_db_entry *
	iwl_phy_db_get_section(struct iwl_phy_db *phy_db,
	enum iwl_phy_db_section_type type,
	u16 chg_id)
	{
	if (!phy_db \|\| type >= IWL_PHY_DB_MAX)
	return NULL;

	switch (type) {
	case IWL_PHY_DB_CFG:
	return &phy_db->cfg;
	case IWL_PHY_DB_CALIB_NCH:
	return &phy_db->calib_nch;
	case IWL_PHY_DB_CALIB_CHG_PAPD:
	if (chg_id >= phy_db->n_group_papd)
	return NULL;
	return &phy_db->calib_ch_group_papd[chg_id];
	case IWL_PHY_DB_CALIB_CHG_TXP:
	if (chg_id >= phy_db->n_group_txp)
	return NULL;
	return &phy_db->calib_ch_group_txp[chg_id];
	default:
	return NULL;
	}
	return NULL;
	}

	static void iwl_phy_db_free_section(struct iwl_phy_db *phy_db,
	enum iwl_phy_db_section_type type,
	u16 chg_id)
	{
	struct iwl_phy_db_entry *entry =
	iwl_phy_db_get_section(phy_db, type, chg_id);
	if (!entry)
	return;

	kfree(entry->data);
	entry->data = NULL;
	entry->size = 0;
	}

	void iwl_phy_db_free(struct iwl_phy_db *phy_db)
	{
	int i;

	if (!phy_db)
	return;

	iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CFG, 0);
	iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_NCH, 0);

	for (i = 0; i < phy_db->n_group_papd; i++)
	iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_PAPD, i);
	kfree(phy_db->calib_ch_group_papd);

	for (i = 0; i < phy_db->n_group_txp; i++)
	iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_TXP, i);
	kfree(phy_db->calib_ch_group_txp);

	kfree(phy_db);
	}
	IWL_EXPORT_SYMBOL(iwl_phy_db_free);

	int iwl_phy_db_set_section(struct iwl_phy_db *phy_db,
	struct iwl_rx_packet *pkt)
	{
	struct iwl_calib_res_notif_phy_db *phy_db_notif =
	(struct iwl_calib_res_notif_phy_db *)pkt->data;
	enum iwl_phy_db_section_type type = le16_to_cpu(phy_db_notif->type);
	u16 size = le16_to_cpu(phy_db_notif->length);
	struct iwl_phy_db_entry *entry;
	u16 chg_id = 0;

	if (!phy_db)
	return -EINVAL;

	if (type == IWL_PHY_DB_CALIB_CHG_PAPD) {
	chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
	if (phy_db && !phy_db->calib_ch_group_papd) {
	/*
	* Firmware sends the largest index first, so we can use
	* it to know how much we should allocate.
	*/
	phy_db->calib_ch_group_papd = kcalloc(chg_id + 1,
	sizeof(struct iwl_phy_db_entry),
	GFP_ATOMIC);
	if (!phy_db->calib_ch_group_papd)
	return -ENOMEM;
	phy_db->n_group_papd = chg_id + 1;
	}
	} else if (type == IWL_PHY_DB_CALIB_CHG_TXP) {
	chg_id = le16_to_cpup((__le16 *)phy_db_notif->data);
	if (phy_db && !phy_db->calib_ch_group_txp) {
	/*
	* Firmware sends the largest index first, so we can use
	* it to know how much we should allocate.
	*/
	phy_db->calib_ch_group_txp = kcalloc(chg_id + 1,
	sizeof(struct iwl_phy_db_entry),
	GFP_ATOMIC);
	if (!phy_db->calib_ch_group_txp)
	return -ENOMEM;
	phy_db->n_group_txp = chg_id + 1;
	}
	}

	entry = iwl_phy_db_get_section(phy_db, type, chg_id);
	if (!entry)
	return -EINVAL;

	kfree(entry->data);
	entry->data = kmemdup(phy_db_notif->data, size, GFP_ATOMIC);
	if (!entry->data) {
	entry->size = 0;
	return -ENOMEM;
	}

	entry->size = size;

	IWL_DEBUG_INFO(phy_db->trans,
	"%s(%d): [PHYDB]SET: Type %d , Size: %d\n",
	__func__, __LINE__, type, size);

	return 0;
	}
	IWL_EXPORT_SYMBOL(iwl_phy_db_set_section);

	static int is_valid_channel(u16 ch_id)
	{
	if (ch_id <= 14 \|\|
	(36 <= ch_id && ch_id <= 64 && ch_id % 4 == 0) \|\|
	(100 <= ch_id && ch_id <= 140 && ch_id % 4 == 0) \|\|
	(145 <= ch_id && ch_id <= 165 && ch_id % 4 == 1))
	return 1;
	return 0;
	}

	static u8 ch_id_to_ch_index(u16 ch_id)
	{
	if (WARN_ON(!is_valid_channel(ch_id)))
	return 0xff;

	if (ch_id <= 14)
	return ch_id - 1;
	if (ch_id <= 64)
	return (ch_id + 20) / 4;
	if (ch_id <= 140)
	return (ch_id - 12) / 4;
	return (ch_id - 13) / 4;
	}


	static u16 channel_id_to_papd(u16 ch_id)
	{
	if (WARN_ON(!is_valid_channel(ch_id)))
	return 0xff;

	if (1 <= ch_id && ch_id <= 14)
	return 0;
	if (36 <= ch_id && ch_id <= 64)
	return 1;
	if (100 <= ch_id && ch_id <= 140)
	return 2;
	return 3;
	}

	static u16 channel_id_to_txp(struct iwl_phy_db *phy_db, u16 ch_id)
	{
	struct iwl_phy_db_chg_txp *txp_chg;
	int i;
	u8 ch_index = ch_id_to_ch_index(ch_id);
	if (ch_index == 0xff)
	return 0xff;

	for (i = 0; i < phy_db->n_group_txp; i++) {
	txp_chg = (void *)phy_db->calib_ch_group_txp[i].data;
	if (!txp_chg)
	return 0xff;
	/*
	* Looking for the first channel group that its max channel is
	* higher then wanted channel.
	*/
	if (le16_to_cpu(txp_chg->max_channel_idx) >= ch_index)
	return i;
	}
	return 0xff;
	}
	static
	int iwl_phy_db_get_section_data(struct iwl_phy_db *phy_db,
	u32 type, u8 *data, u16 size, u16 ch_id)
	{
	struct iwl_phy_db_entry *entry;
	u16 ch_group_id = 0;

	if (!phy_db)
	return -EINVAL;

	/* find wanted channel group */
	if (type == IWL_PHY_DB_CALIB_CHG_PAPD)
	ch_group_id = channel_id_to_papd(ch_id);
	else if (type == IWL_PHY_DB_CALIB_CHG_TXP)
	ch_group_id = channel_id_to_txp(phy_db, ch_id);

	entry = iwl_phy_db_get_section(phy_db, type, ch_group_id);
	if (!entry)
	return -EINVAL;

	*data = entry->data;
	*size = entry->size;

	IWL_DEBUG_INFO(phy_db->trans,
	"%s(%d): [PHYDB] GET: Type %d , Size: %d\n",
	__func__, __LINE__, type, *size);

	return 0;
	}

	static int iwl_send_phy_db_cmd(struct iwl_phy_db *phy_db, u16 type,
	u16 length, void *data)
	{
	struct iwl_phy_db_cmd phy_db_cmd;
	struct iwl_host_cmd cmd = {
	.id = PHY_DB_CMD,
	};

	IWL_DEBUG_INFO(phy_db->trans,
	"Sending PHY-DB hcmd of type %d, of length %d\n",
	type, length);

	/* Set phy db cmd variables */
	phy_db_cmd.type = cpu_to_le16(type);
	phy_db_cmd.length = cpu_to_le16(length);

	/* Set hcmd variables */
	cmd.data[0] = &phy_db_cmd;
	cmd.len[0] = sizeof(struct iwl_phy_db_cmd);
	cmd.data[1] = data;
	cmd.len[1] = length;
	cmd.dataflags[1] = IWL_HCMD_DFL_NOCOPY;

	return iwl_trans_send_cmd(phy_db->trans, &cmd);
	}

	static int iwl_phy_db_send_all_channel_groups(
	struct iwl_phy_db *phy_db,
	enum iwl_phy_db_section_type type,
	u8 max_ch_groups)
	{
	u16 i;
	int err;
	struct iwl_phy_db_entry *entry;

	/* Send all the channel specific groups to operational fw */
	for (i = 0; i < max_ch_groups; i++) {
	entry = iwl_phy_db_get_section(phy_db,
	type,
	i);
	if (!entry)
	return -EINVAL;

	if (!entry->size)
	continue;

	/* Send the requested PHY DB section */
	err = iwl_send_phy_db_cmd(phy_db,
	type,
	entry->size,
	entry->data);
	if (err) {
	IWL_ERR(phy_db->trans,
	"Can't SEND phy_db section %d (%d), err %d\n",
	type, i, err);
	return err;
	}

	IWL_DEBUG_INFO(phy_db->trans,
	"Sent PHY_DB HCMD, type = %d num = %d\n",
	type, i);
	}

	return 0;
	}

	int iwl_send_phy_db_data(struct iwl_phy_db *phy_db)
	{
	u8 *data = NULL;
	u16 size = 0;
	int err;

	IWL_DEBUG_INFO(phy_db->trans,
	"Sending phy db data and configuration to runtime image\n");

	/* Send PHY DB CFG section */
	err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CFG,
	&data, &size, 0);
	if (err) {
	IWL_ERR(phy_db->trans, "Cannot get Phy DB cfg section\n");
	return err;
	}

	err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CFG, size, data);
	if (err) {
	IWL_ERR(phy_db->trans,
	"Cannot send HCMD of Phy DB cfg section\n");
	return err;
	}

	err = iwl_phy_db_get_section_data(phy_db, IWL_PHY_DB_CALIB_NCH,
	&data, &size, 0);
	if (err) {
	IWL_ERR(phy_db->trans,
	"Cannot get Phy DB non specific channel section\n");
	return err;
	}

	err = iwl_send_phy_db_cmd(phy_db, IWL_PHY_DB_CALIB_NCH, size, data);
	if (err) {
	IWL_ERR(phy_db->trans,
	"Cannot send HCMD of Phy DB non specific channel section\n");
	return err;
	}

	/* Send all the TXP channel specific data */
	err = iwl_phy_db_send_all_channel_groups(phy_db,
	IWL_PHY_DB_CALIB_CHG_PAPD,
	phy_db->n_group_papd);
	if (err) {
	IWL_ERR(phy_db->trans,
	"Cannot send channel specific PAPD groups\n");
	return err;
	}

	/* Send all the TXP channel specific data */
	err = iwl_phy_db_send_all_channel_groups(phy_db,
	IWL_PHY_DB_CALIB_CHG_TXP,
	phy_db->n_group_txp);
	if (err) {
	IWL_ERR(phy_db->trans,
	"Cannot send channel specific TX power groups\n");
	return err;
	}

	IWL_DEBUG_INFO(phy_db->trans,
	"Finished sending phy db non channel data\n");
	return 0;
	}
	IWL_EXPORT_SYMBOL(iwl_send_phy_db_data);