/******************************************************************************
*
* 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 - 2012 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
* BSD LICENSE
*
* Copyright(c) 2005 - 2012 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 "iwl-debug.h"
#include "iwl-dev.h"
#include "iwl-phy-db.h"
#define CHANNEL_NUM_SIZE 4 /* num of channels in calib_ch size */
struct iwl_phy_db *iwl_phy_db_init(struct device *dev)
{
struct iwl_phy_db *phy_db = kzalloc(sizeof(struct iwl_phy_db),
GFP_KERNEL);
if (!phy_db)
return phy_db;
phy_db->dev = dev;
/* TODO: add default values of the phy db. */
return phy_db;
}
/*
* 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 < 0 || 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_CH:
return &phy_db->calib_ch;
case IWL_PHY_DB_CALIB_CHG_PAPD:
if (chg_id < 0 || chg_id >= IWL_NUM_PAPD_CH_GROUPS)
return NULL;
return &phy_db->calib_ch_group_papd[chg_id];
case IWL_PHY_DB_CALIB_CHG_TXP:
if (chg_id < 0 || chg_id >= IWL_NUM_TXP_CH_GROUPS)
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);
iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CH, 0);
for (i = 0; i < IWL_NUM_PAPD_CH_GROUPS; i++)
iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_PAPD, i);
for (i = 0; i < IWL_NUM_TXP_CH_GROUPS; i++)
iwl_phy_db_free_section(phy_db, IWL_PHY_DB_CALIB_CHG_TXP, i);
kfree(phy_db);
}
int iwl_phy_db_set_section(struct iwl_phy_db *phy_db,
enum iwl_phy_db_section_type type, u8 *data,
u16 size, gfp_t alloc_ctx)
{
struct iwl_phy_db_entry *entry;
u16 chg_id = 0;
if (!phy_db)
return -EINVAL;
if (type == IWL_PHY_DB_CALIB_CHG_PAPD ||
type == IWL_PHY_DB_CALIB_CHG_TXP)
chg_id = le16_to_cpup((__le16 *)data);
entry = iwl_phy_db_get_section(phy_db, type, chg_id);
if (!entry)
return -EINVAL;
kfree(entry->data);
entry->data = kmemdup(data, size, alloc_ctx);
if (!entry->data) {
entry->size = 0;
return -ENOMEM;
}
entry->size = size;
if (type == IWL_PHY_DB_CALIB_CH) {
phy_db->channel_num = le32_to_cpup((__le32 *)data);
phy_db->channel_size =
(size - CHANNEL_NUM_SIZE) / phy_db->channel_num;
}
return 0;
}
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 < IWL_NUM_TXP_CH_GROUPS; 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;
}
int iwl_phy_db_get_section_data(struct iwl_phy_db *phy_db,
enum iwl_phy_db_section_type type, u8 **data,
u16 *size, u16 ch_id)
{
struct iwl_phy_db_entry *entry;
u32 channel_num;
u32 channel_size;
u16 ch_group_id = 0;
u16 index;
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;
if (type == IWL_PHY_DB_CALIB_CH) {
index = ch_id_to_ch_index(ch_id);
channel_num = phy_db->channel_num;
channel_size = phy_db->channel_size;
if (index >= channel_num) {
IWL_ERR(phy_db, "Wrong channel number %d", ch_id);
return -EINVAL;
}
*data = entry->data + CHANNEL_NUM_SIZE + index * channel_size;
*size = channel_size;
} else {
*data = entry->data;
*size = entry->size;
}
return 0;
}
