iwlwifi: move agn only eeprom functions to separate file

Some of the functions in iwl-eeprom.c file are for agn devices only,
Those functions do not have to be part of iwlcore.ko, so move those
to iwl-agn-eeprom.c file.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

1 files changed, 454 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c b/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c
new file mode 100644
index 00000000000..a650baba080
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-eeprom.c
@@ -0,0 +1,454 @@
+/******************************************************************************
+ *
+ * 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 - 2010 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 - 2010 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/slab.h>
+#include <linux/init.h>
+
+#include <net/mac80211.h>
+
+#include "iwl-commands.h"
+#include "iwl-dev.h"
+#include "iwl-core.h"
+#include "iwl-debug.h"
+#include "iwl-agn.h"
+#include "iwl-io.h"
+
+/************************** EEPROM BANDS ****************************
+ *
+ * The iwl_eeprom_band definitions below provide the mapping from the
+ * EEPROM contents to the specific channel number supported for each
+ * band.
+ *
+ * For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
+ * definition below maps to physical channel 42 in the 5.2GHz spectrum.
+ * The specific geography and calibration information for that channel
+ * is contained in the eeprom map itself.
+ *
+ * During init, we copy the eeprom information and channel map
+ * information into priv->channel_info_24/52 and priv->channel_map_24/52
+ *
+ * channel_map_24/52 provides the index in the channel_info array for a
+ * given channel.  We have to have two separate maps as there is channel
+ * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
+ * band_2
+ *
+ * A value of 0xff stored in the channel_map indicates that the channel
+ * is not supported by the hardware at all.
+ *
+ * A value of 0xfe in the channel_map indicates that the channel is not
+ * valid for Tx with the current hardware.  This means that
+ * while the system can tune and receive on a given channel, it may not
+ * be able to associate or transmit any frames on that
+ * channel.  There is no corresponding channel information for that
+ * entry.
+ *
+ *********************************************************************/
+
+/**
+ * struct iwl_txpwr_section: eeprom section information
+ * @offset: indirect address into eeprom image
+ * @count: number of "struct iwl_eeprom_enhanced_txpwr" in this section
+ * @band: band type for the section
+ * @is_common - true: common section, false: channel section
+ * @is_cck - true: cck section, false: not cck section
+ * @is_ht_40 - true: all channel in the section are HT40 channel,
+ *	       false: legacy or HT 20 MHz
+ *	       ignore if it is common section
+ * @iwl_eeprom_section_channel: channel array in the section,
+ *	       ignore if common section
+ */
+struct iwl_txpwr_section {
+	u32 offset;
+	u8 count;
+	enum ieee80211_band band;
+	bool is_common;
+	bool is_cck;
+	bool is_ht40;
+	u8 iwl_eeprom_section_channel[EEPROM_MAX_TXPOWER_SECTION_ELEMENTS];
+};
+
+/**
+ * section 1 - 3 are regulatory tx power apply to all channels based on
+ *    modulation: CCK, OFDM
+ *    Band: 2.4GHz, 5.2GHz
+ * section 4 - 10 are regulatory tx power apply to specified channels
+ *    For example:
+ *	1L - Channel 1 Legacy
+ *	1HT - Channel 1 HT
+ *	(1,+1) - Channel 1 HT40 "_above_"
+ *
+ * Section 1: all CCK channels
+ * Section 2: all 2.4 GHz OFDM (Legacy, HT and HT40) channels
+ * Section 3: all 5.2 GHz OFDM (Legacy, HT and HT40) channels
+ * Section 4: 2.4 GHz 20MHz channels: 1L, 1HT, 2L, 2HT, 10L, 10HT, 11L, 11HT
+ * Section 5: 2.4 GHz 40MHz channels: (1,+1) (2,+1) (6,+1) (7,+1) (9,+1)
+ * Section 6: 5.2 GHz 20MHz channels: 36L, 64L, 100L, 36HT, 64HT, 100HT
+ * Section 7: 5.2 GHz 40MHz channels: (36,+1) (60,+1) (100,+1)
+ * Section 8: 2.4 GHz channel: 13L, 13HT
+ * Section 9: 2.4 GHz channel: 140L, 140HT
+ * Section 10: 2.4 GHz 40MHz channels: (132,+1)  (44,+1)
+ *
+ */
+static const struct iwl_txpwr_section enhinfo[] = {
+	{ EEPROM_LB_CCK_20_COMMON, 1, IEEE80211_BAND_2GHZ, true, true, false },
+	{ EEPROM_LB_OFDM_COMMON, 3, IEEE80211_BAND_2GHZ, true, false, false },
+	{ EEPROM_HB_OFDM_COMMON, 3, IEEE80211_BAND_5GHZ, true, false, false },
+	{ EEPROM_LB_OFDM_20_BAND, 8, IEEE80211_BAND_2GHZ,
+		false, false, false,
+		{1, 1, 2, 2, 10, 10, 11, 11 } },
+	{ EEPROM_LB_OFDM_HT40_BAND, 5, IEEE80211_BAND_2GHZ,
+		false, false, true,
+		{ 1, 2, 6, 7, 9 } },
+	{ EEPROM_HB_OFDM_20_BAND, 6, IEEE80211_BAND_5GHZ,
+		false, false, false,
+		{ 36, 64, 100, 36, 64, 100 } },
+	{ EEPROM_HB_OFDM_HT40_BAND, 3, IEEE80211_BAND_5GHZ,
+		false, false, true,
+		{ 36, 60, 100 } },
+	{ EEPROM_LB_OFDM_20_CHANNEL_13, 2, IEEE80211_BAND_2GHZ,
+		false, false, false,
+		{ 13, 13 } },
+	{ EEPROM_HB_OFDM_20_CHANNEL_140, 2, IEEE80211_BAND_5GHZ,
+		false, false, false,
+		{ 140, 140 } },
+	{ EEPROM_HB_OFDM_HT40_BAND_1, 2, IEEE80211_BAND_5GHZ,
+		false, false, true,
+		{ 132, 44 } },
+};
+
+/******************************************************************************
+ *
+ * EEPROM related functions
+ *
+******************************************************************************/
+
+/*
+ * 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 iwl_priv *priv)
+{
+	u16 count;
+	int ret;
+
+	for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) {
+		/* Request semaphore */
+		iwl_set_bit(priv, CSR_HW_IF_CONFIG_REG,
+			    CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
+
+		/* See if we got it */
+		ret = iwl_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(priv,
+				"Acquired semaphore after %d tries.\n",
+				count+1);
+			return ret;
+		}
+	}
+
+	return ret;
+}
+
+void iwlcore_eeprom_release_semaphore(struct iwl_priv *priv)
+{
+	iwl_clear_bit(priv, CSR_HW_IF_CONFIG_REG,
+		CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM);
+
+}
+
+int iwl_eeprom_check_version(struct iwl_priv *priv)
+{
+	u16 eeprom_ver;
+	u16 calib_ver;
+
+	eeprom_ver = iwl_eeprom_query16(priv, EEPROM_VERSION);
+	calib_ver = priv->cfg->ops->lib->eeprom_ops.calib_version(priv);
+
+	if (eeprom_ver < priv->cfg->eeprom_ver ||
+	    calib_ver < priv->cfg->eeprom_calib_ver)
+		goto err;
+
+	IWL_INFO(priv, "device EEPROM VER=0x%x, CALIB=0x%x\n",
+		 eeprom_ver, calib_ver);
+
+	return 0;
+err:
+	IWL_ERR(priv, "Unsupported (too old) EEPROM VER=0x%x < 0x%x "
+		  "CALIB=0x%x < 0x%x\n",
+		  eeprom_ver, priv->cfg->eeprom_ver,
+		  calib_ver,  priv->cfg->eeprom_calib_ver);
+	return -EINVAL;
+
+}
+
+void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
+{
+	const u8 *addr = priv->cfg->ops->lib->eeprom_ops.query_addr(priv,
+					EEPROM_MAC_ADDRESS);
+	memcpy(mac, addr, ETH_ALEN);
+}
+
+/**
+ * iwl_get_max_txpower_avg - get the highest tx power from all chains.
+ *     find the highest tx power from all chains for the channel
+ */
+static s8 iwl_get_max_txpower_avg(struct iwl_priv *priv,
+		struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
+		int element, s8 *max_txpower_in_half_dbm)
+{
+	s8 max_txpower_avg = 0; /* (dBm) */
+
+	IWL_DEBUG_INFO(priv, "%d - "
+			"chain_a: %d dB chain_b: %d dB "
+			"chain_c: %d dB mimo2: %d dB mimo3: %d dB\n",
+			element,
+			enhanced_txpower[element].chain_a_max >> 1,
+			enhanced_txpower[element].chain_b_max >> 1,
+			enhanced_txpower[element].chain_c_max >> 1,
+			enhanced_txpower[element].mimo2_max >> 1,
+			enhanced_txpower[element].mimo3_max >> 1);
+	/* Take the highest tx power from any valid chains */
+	if ((priv->cfg->valid_tx_ant & ANT_A) &&
+	    (enhanced_txpower[element].chain_a_max > max_txpower_avg))
+		max_txpower_avg = enhanced_txpower[element].chain_a_max;
+	if ((priv->cfg->valid_tx_ant & ANT_B) &&
+	    (enhanced_txpower[element].chain_b_max > max_txpower_avg))
+		max_txpower_avg = enhanced_txpower[element].chain_b_max;
+	if ((priv->cfg->valid_tx_ant & ANT_C) &&
+	    (enhanced_txpower[element].chain_c_max > max_txpower_avg))
+		max_txpower_avg = enhanced_txpower[element].chain_c_max;
+	if (((priv->cfg->valid_tx_ant == ANT_AB) |
+	    (priv->cfg->valid_tx_ant == ANT_BC) |
+	    (priv->cfg->valid_tx_ant == ANT_AC)) &&
+	    (enhanced_txpower[element].mimo2_max > max_txpower_avg))
+		max_txpower_avg =  enhanced_txpower[element].mimo2_max;
+	if ((priv->cfg->valid_tx_ant == ANT_ABC) &&
+	    (enhanced_txpower[element].mimo3_max > max_txpower_avg))
+		max_txpower_avg = enhanced_txpower[element].mimo3_max;
+
+	/*
+	 * max. tx power in EEPROM is in 1/2 dBm format
+	 * convert from 1/2 dBm to dBm (round-up convert)
+	 * but we also do not want to loss 1/2 dBm resolution which
+	 * will impact performance
+	 */
+	*max_txpower_in_half_dbm = max_txpower_avg;
+	return (max_txpower_avg & 0x01) + (max_txpower_avg >> 1);
+}
+
+/**
+ * iwl_update_common_txpower: update channel tx power
+ *     update tx power per band based on EEPROM enhanced tx power info.
+ */
+static s8 iwl_update_common_txpower(struct iwl_priv *priv,
+		struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
+		int section, int element, s8 *max_txpower_in_half_dbm)
+{
+	struct iwl_channel_info *ch_info;
+	int ch;
+	bool is_ht40 = false;
+	s8 max_txpower_avg; /* (dBm) */
+
+	/* it is common section, contain all type (Legacy, HT and HT40)
+	 * based on the element in the section to determine
+	 * is it HT 40 or not
+	 */
+	if (element == EEPROM_TXPOWER_COMMON_HT40_INDEX)
+		is_ht40 = true;
+	max_txpower_avg =
+		iwl_get_max_txpower_avg(priv, enhanced_txpower,
+					element, max_txpower_in_half_dbm);
+
+	ch_info = priv->channel_info;
+
+	for (ch = 0; ch < priv->channel_count; ch++) {
+		/* find matching band and update tx power if needed */
+		if ((ch_info->band == enhinfo[section].band) &&
+		    (ch_info->max_power_avg < max_txpower_avg) &&
+		    (!is_ht40)) {
+			/* Update regulatory-based run-time data */
+			ch_info->max_power_avg = ch_info->curr_txpow =
+				max_txpower_avg;
+			ch_info->scan_power = max_txpower_avg;
+		}
+		if ((ch_info->band == enhinfo[section].band) && is_ht40 &&
+		    (ch_info->ht40_max_power_avg < max_txpower_avg)) {
+			/* Update regulatory-based run-time data */
+			ch_info->ht40_max_power_avg = max_txpower_avg;
+		}
+		ch_info++;
+	}
+	return max_txpower_avg;
+}
+
+/**
+ * iwl_update_channel_txpower: update channel tx power
+ *      update channel tx power based on EEPROM enhanced tx power info.
+ */
+static s8 iwl_update_channel_txpower(struct iwl_priv *priv,
+		struct iwl_eeprom_enhanced_txpwr *enhanced_txpower,
+		int section, int element, s8 *max_txpower_in_half_dbm)
+{
+	struct iwl_channel_info *ch_info;
+	int ch;
+	u8 channel;
+	s8 max_txpower_avg; /* (dBm) */
+
+	channel = enhinfo[section].iwl_eeprom_section_channel[element];
+	max_txpower_avg =
+		iwl_get_max_txpower_avg(priv, enhanced_txpower,
+					element, max_txpower_in_half_dbm);
+
+	ch_info = priv->channel_info;
+	for (ch = 0; ch < priv->channel_count; ch++) {
+		/* find matching channel and update tx power if needed */
+		if (ch_info->channel == channel) {
+			if ((ch_info->max_power_avg < max_txpower_avg) &&
+			    (!enhinfo[section].is_ht40)) {
+				/* Update regulatory-based run-time data */
+				ch_info->max_power_avg = max_txpower_avg;
+				ch_info->curr_txpow = max_txpower_avg;
+				ch_info->scan_power = max_txpower_avg;
+			}
+			if ((enhinfo[section].is_ht40) &&
+			    (ch_info->ht40_max_power_avg < max_txpower_avg)) {
+				/* Update regulatory-based run-time data */
+				ch_info->ht40_max_power_avg = max_txpower_avg;
+			}
+			break;
+		}
+		ch_info++;
+	}
+	return max_txpower_avg;
+}
+
+/**
+ * iwlcore_eeprom_enhanced_txpower: process enhanced tx power info
+ */
+void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
+{
+	int eeprom_section_count = 0;
+	int section, element;
+	struct iwl_eeprom_enhanced_txpwr *enhanced_txpower;
+	u32 offset;
+	s8 max_txpower_avg; /* (dBm) */
+	s8 max_txpower_in_half_dbm; /* (half-dBm) */
+
+	/* Loop through all the sections
+	 * adjust bands and channel's max tx power
+	 * Set the tx_power_user_lmt to the highest power
+	 * supported by any channels and chains
+	 */
+	for (section = 0; section < ARRAY_SIZE(enhinfo); section++) {
+		eeprom_section_count = enhinfo[section].count;
+		offset = enhinfo[section].offset;
+		enhanced_txpower = (struct iwl_eeprom_enhanced_txpwr *)
+				iwl_eeprom_query_addr(priv, offset);
+
+		/*
+		 * check for valid entry -
+		 * different version of EEPROM might contain different set
+		 * of enhanced tx power table
+		 * always check for valid entry before process
+		 * the information
+		 */
+		if (!enhanced_txpower->common || enhanced_txpower->reserved)
+			continue;
+
+		for (element = 0; element < eeprom_section_count; element++) {
+			if (enhinfo[section].is_common)
+				max_txpower_avg =
+					iwl_update_common_txpower(priv,
+						enhanced_txpower, section,
+						element,
+						&max_txpower_in_half_dbm);
+			else
+				max_txpower_avg =
+					iwl_update_channel_txpower(priv,
+						enhanced_txpower, section,
+						element,
+						&max_txpower_in_half_dbm);
+
+			/* Update the tx_power_user_lmt to the highest power
+			 * supported by any channel */
+			if (max_txpower_avg > priv->tx_power_user_lmt)
+				priv->tx_power_user_lmt = max_txpower_avg;
+
+			/*
+			 * Update the tx_power_lmt_in_half_dbm to
+			 * the highest power supported by any channel
+			 */
+			if (max_txpower_in_half_dbm >
+			    priv->tx_power_lmt_in_half_dbm)
+				priv->tx_power_lmt_in_half_dbm =
+					max_txpower_in_half_dbm;
+		}
+	}
+}