iwlwifi: phy_db structure

Add iwl_phy_db structure and API.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 273 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-phy-db.c b/drivers/net/wireless/iwlwifi/iwl-phy-db.c
new file mode 100644
index 000000000000..d65305d08ebf
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-phy-db.c
@@ -0,0 +1,273 @@
+/******************************************************************************
+ *
+ * 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-shared.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 iwl_shared *shrd)
+{
+	struct iwl_phy_db *phy_db = kzalloc(sizeof(struct iwl_phy_db),
+					    GFP_KERNEL);
+
+	if (!phy_db)
+		return phy_db;
+
+	phy_db->shrd = shrd;
+
+	/* 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)
+{
+	/* TODO David*/
+	return 0;
+}
+
+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;
+}