[deliverable/linux.git] / drivers / net / wireless / iwlegacy / iwl-eeprom.c

/******************************************************************************
 *
 * 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 - 2011 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 - 2011 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-eeprom.h"
#include "iwl-io.h"

/************************** EEPROM BANDS ****************************
 *
 * The iwlegacy_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.
 *
 *********************************************************************/

/* 2.4 GHz */
const u8 iwlegacy_eeprom_band_1[14] = {
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
};

/* 5.2 GHz bands */
static const u8 iwlegacy_eeprom_band_2[] = {	/* 4915-5080MHz */
	183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
};

static const u8 iwlegacy_eeprom_band_3[] = {	/* 5170-5320MHz */
	34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
};

static const u8 iwlegacy_eeprom_band_4[] = {	/* 5500-5700MHz */
	100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
};

static const u8 iwlegacy_eeprom_band_5[] = {	/* 5725-5825MHz */
	145, 149, 153, 157, 161, 165
};

static const u8 iwlegacy_eeprom_band_6[] = {       /* 2.4 ht40 channel */
	1, 2, 3, 4, 5, 6, 7
};

static const u8 iwlegacy_eeprom_band_7[] = {       /* 5.2 ht40 channel */
	36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
};

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

static int iwl_legacy_eeprom_verify_signature(struct iwl_priv *priv)
{
	u32 gp = iwl_read32(priv, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
	int ret = 0;

	IWL_DEBUG_EEPROM(priv, "EEPROM signature=0x%08x\n", gp);
	switch (gp) {
	case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
	case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
		break;
	default:
		IWL_ERR(priv, "bad EEPROM signature,"
			"EEPROM_GP=0x%08x\n", gp);
		ret = -ENOENT;
		break;
	}
	return ret;
}

const u8
*iwl_legacy_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
{
	BUG_ON(offset >= priv->cfg->base_params->eeprom_size);
	return &priv->eeprom[offset];
}
EXPORT_SYMBOL(iwl_legacy_eeprom_query_addr);

u16 iwl_legacy_eeprom_query16(const struct iwl_priv *priv, size_t offset)
{
	if (!priv->eeprom)
		return 0;
	return (u16)priv->eeprom[offset] | ((u16)priv->eeprom[offset + 1] << 8);
}
EXPORT_SYMBOL(iwl_legacy_eeprom_query16);

/**
 * iwl_legacy_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_legacy_eeprom_init(struct iwl_priv *priv)
{
	__le16 *e;
	u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
	int sz;
	int ret;
	u16 addr;

	/* allocate eeprom */
	sz = priv->cfg->base_params->eeprom_size;
	IWL_DEBUG_EEPROM(priv, "NVM size = %d\n", sz);
	priv->eeprom = kzalloc(sz, GFP_KERNEL);
	if (!priv->eeprom) {
		ret = -ENOMEM;
		goto alloc_err;
	}
	e = (__le16 *)priv->eeprom;

	priv->cfg->ops->lib->apm_ops.init(priv);

	ret = iwl_legacy_eeprom_verify_signature(priv);
	if (ret < 0) {
		IWL_ERR(priv, "EEPROM not found, EEPROM_GP=0x%08x\n", gp);
		ret = -ENOENT;
		goto err;
	}

	/* 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_ERR(priv, "Failed to acquire EEPROM semaphore.\n");
		ret = -ENOENT;
		goto err;
	}

	/* eeprom is an array of 16bit values */
	for (addr = 0; addr < sz; addr += sizeof(u16)) {
		u32 r;

		_iwl_legacy_write32(priv, CSR_EEPROM_REG,
			     CSR_EEPROM_REG_MSK_ADDR & (addr << 1));

		ret = iwl_poll_bit(priv, CSR_EEPROM_REG,
					  CSR_EEPROM_REG_READ_VALID_MSK,
					  CSR_EEPROM_REG_READ_VALID_MSK,
					  IWL_EEPROM_ACCESS_TIMEOUT);
		if (ret < 0) {
			IWL_ERR(priv, "Time out reading EEPROM[%d]\n",
							addr);
			goto done;
		}
		r = _iwl_legacy_read_direct32(priv, CSR_EEPROM_REG);
		e[addr / 2] = cpu_to_le16(r >> 16);
	}

	IWL_DEBUG_EEPROM(priv, "NVM Type: %s, version: 0x%x\n",
		       "EEPROM",
		       iwl_legacy_eeprom_query16(priv, EEPROM_VERSION));

	ret = 0;
done:
	priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);

err:
	if (ret)
		iwl_legacy_eeprom_free(priv);
	/* Reset chip to save power until we load uCode during "up". */
	iwl_legacy_apm_stop(priv);
alloc_err:
	return ret;
}
EXPORT_SYMBOL(iwl_legacy_eeprom_init);

void iwl_legacy_eeprom_free(struct iwl_priv *priv)
{
	kfree(priv->eeprom);
	priv->eeprom = NULL;
}
EXPORT_SYMBOL(iwl_legacy_eeprom_free);

static void iwl_legacy_init_band_reference(const struct iwl_priv *priv,
			int eep_band, int *eeprom_ch_count,
			const struct iwl_eeprom_channel **eeprom_ch_info,
			const u8 **eeprom_ch_index)
{
	u32 offset = priv->cfg->ops->lib->
			eeprom_ops.regulatory_bands[eep_band - 1];
	switch (eep_band) {
	case 1:		/* 2.4GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_1);
		*eeprom_ch_info = (struct iwl_eeprom_channel *)
				iwl_legacy_eeprom_query_addr(priv, offset);
		*eeprom_ch_index = iwlegacy_eeprom_band_1;
		break;
	case 2:		/* 4.9GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_2);
		*eeprom_ch_info = (struct iwl_eeprom_channel *)
				iwl_legacy_eeprom_query_addr(priv, offset);
		*eeprom_ch_index = iwlegacy_eeprom_band_2;
		break;
	case 3:		/* 5.2GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_3);
		*eeprom_ch_info = (struct iwl_eeprom_channel *)
				iwl_legacy_eeprom_query_addr(priv, offset);
		*eeprom_ch_index = iwlegacy_eeprom_band_3;
		break;
	case 4:		/* 5.5GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_4);
		*eeprom_ch_info = (struct iwl_eeprom_channel *)
				iwl_legacy_eeprom_query_addr(priv, offset);
		*eeprom_ch_index = iwlegacy_eeprom_band_4;
		break;
	case 5:		/* 5.7GHz band */
		*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_5);
		*eeprom_ch_info = (struct iwl_eeprom_channel *)
				iwl_legacy_eeprom_query_addr(priv, offset);
		*eeprom_ch_index = iwlegacy_eeprom_band_5;
		break;
	case 6:		/* 2.4GHz ht40 channels */
		*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_6);
		*eeprom_ch_info = (struct iwl_eeprom_channel *)
				iwl_legacy_eeprom_query_addr(priv, offset);
		*eeprom_ch_index = iwlegacy_eeprom_band_6;
		break;
	case 7:		/* 5 GHz ht40 channels */
		*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_7);
		*eeprom_ch_info = (struct iwl_eeprom_channel *)
				iwl_legacy_eeprom_query_addr(priv, offset);
		*eeprom_ch_index = iwlegacy_eeprom_band_7;
		break;
	default:
		BUG();
		return;
	}
}

#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
			    ? # x " " : "")
/**
 * iwl_legacy_mod_ht40_chan_info - Copy ht40 channel info into driver's priv.
 *
 * Does not set up a command, or touch hardware.
 */
static int iwl_legacy_mod_ht40_chan_info(struct iwl_priv *priv,
			      enum ieee80211_band band, u16 channel,
			      const struct iwl_eeprom_channel *eeprom_ch,
			      u8 clear_ht40_extension_channel)
{
	struct iwl_channel_info *ch_info;

	ch_info = (struct iwl_channel_info *)
			iwl_legacy_get_channel_info(priv, band, channel);

	if (!iwl_legacy_is_channel_valid(ch_info))
		return -1;

	IWL_DEBUG_EEPROM(priv, "HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
			" Ad-Hoc %ssupported\n",
			ch_info->channel,
			iwl_legacy_is_channel_a_band(ch_info) ?
			"5.2" : "2.4",
			CHECK_AND_PRINT(IBSS),
			CHECK_AND_PRINT(ACTIVE),
			CHECK_AND_PRINT(RADAR),
			CHECK_AND_PRINT(WIDE),
			CHECK_AND_PRINT(DFS),
			eeprom_ch->flags,
			eeprom_ch->max_power_avg,
			((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
			 && !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
			"" : "not ");

	ch_info->ht40_eeprom = *eeprom_ch;
	ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
	ch_info->ht40_flags = eeprom_ch->flags;
	if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
		ch_info->ht40_extension_channel &=
					~clear_ht40_extension_channel;

	return 0;
}

#define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
			    ? # x " " : "")

/**
 * iwl_legacy_init_channel_map - Set up driver's info for all possible channels
 */
int iwl_legacy_init_channel_map(struct iwl_priv *priv)
{
	int eeprom_ch_count = 0;
	const u8 *eeprom_ch_index = NULL;
	const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
	int band, ch;
	struct iwl_channel_info *ch_info;

	if (priv->channel_count) {
		IWL_DEBUG_EEPROM(priv, "Channel map already initialized.\n");
		return 0;
	}

	IWL_DEBUG_EEPROM(priv, "Initializing regulatory info from EEPROM\n");

	priv->channel_count =
	    ARRAY_SIZE(iwlegacy_eeprom_band_1) +
	    ARRAY_SIZE(iwlegacy_eeprom_band_2) +
	    ARRAY_SIZE(iwlegacy_eeprom_band_3) +
	    ARRAY_SIZE(iwlegacy_eeprom_band_4) +
	    ARRAY_SIZE(iwlegacy_eeprom_band_5);

	IWL_DEBUG_EEPROM(priv, "Parsing data for %d channels.\n",
			priv->channel_count);

	priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
				     priv->channel_count, GFP_KERNEL);
	if (!priv->channel_info) {
		IWL_ERR(priv, "Could not allocate channel_info\n");
		priv->channel_count = 0;
		return -ENOMEM;
	}

	ch_info = priv->channel_info;

	/* Loop through the 5 EEPROM bands adding them in order to the
	 * channel map we maintain (that contains additional information than
	 * what just in the EEPROM) */
	for (band = 1; band <= 5; band++) {

		iwl_legacy_init_band_reference(priv, band, &eeprom_ch_count,
					&eeprom_ch_info, &eeprom_ch_index);

		/* Loop through each band adding each of the channels */
		for (ch = 0; ch < eeprom_ch_count; ch++) {
			ch_info->channel = eeprom_ch_index[ch];
			ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
			    IEEE80211_BAND_5GHZ;

			/* permanently store EEPROM's channel regulatory flags
			 *   and max power in channel info database. */
			ch_info->eeprom = eeprom_ch_info[ch];

			/* Copy the run-time flags so they are there even on
			 * invalid channels */
			ch_info->flags = eeprom_ch_info[ch].flags;
			/* First write that ht40 is not enabled, and then enable
			 * one by one */
			ch_info->ht40_extension_channel =
					IEEE80211_CHAN_NO_HT40;

			if (!(iwl_legacy_is_channel_valid(ch_info))) {
				IWL_DEBUG_EEPROM(priv,
					       "Ch. %d Flags %x [%sGHz] - "
					       "No traffic\n",
					       ch_info->channel,
					       ch_info->flags,
					       iwl_legacy_is_channel_a_band(ch_info) ?
					       "5.2" : "2.4");
				ch_info++;
				continue;
			}

			/* Initialize regulatory-based run-time data */
			ch_info->max_power_avg = ch_info->curr_txpow =
			    eeprom_ch_info[ch].max_power_avg;
			ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
			ch_info->min_power = 0;

			IWL_DEBUG_EEPROM(priv, "Ch. %d [%sGHz] "
				       "%s%s%s%s%s%s(0x%02x %ddBm):"
				       " Ad-Hoc %ssupported\n",
				       ch_info->channel,
				       iwl_legacy_is_channel_a_band(ch_info) ?
				       "5.2" : "2.4",
				       CHECK_AND_PRINT_I(VALID),
				       CHECK_AND_PRINT_I(IBSS),
				       CHECK_AND_PRINT_I(ACTIVE),
				       CHECK_AND_PRINT_I(RADAR),
				       CHECK_AND_PRINT_I(WIDE),
				       CHECK_AND_PRINT_I(DFS),
				       eeprom_ch_info[ch].flags,
				       eeprom_ch_info[ch].max_power_avg,
				       ((eeprom_ch_info[ch].
					 flags & EEPROM_CHANNEL_IBSS)
					&& !(eeprom_ch_info[ch].
					     flags & EEPROM_CHANNEL_RADAR))
				       ? "" : "not ");

			/* Set the tx_power_user_lmt to the highest power
			 * supported by any channel */
			if (eeprom_ch_info[ch].max_power_avg >
						priv->tx_power_user_lmt)
				priv->tx_power_user_lmt =
				    eeprom_ch_info[ch].max_power_avg;

			ch_info++;
		}
	}

	/* Check if we do have HT40 channels */
	if (priv->cfg->ops->lib->eeprom_ops.regulatory_bands[5] ==
	    EEPROM_REGULATORY_BAND_NO_HT40 &&
	    priv->cfg->ops->lib->eeprom_ops.regulatory_bands[6] ==
	    EEPROM_REGULATORY_BAND_NO_HT40)
		return 0;

	/* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
	for (band = 6; band <= 7; band++) {
		enum ieee80211_band ieeeband;

		iwl_legacy_init_band_reference(priv, band, &eeprom_ch_count,
					&eeprom_ch_info, &eeprom_ch_index);

		/* EEPROM band 6 is 2.4, band 7 is 5 GHz */
		ieeeband =
			(band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;

		/* Loop through each band adding each of the channels */
		for (ch = 0; ch < eeprom_ch_count; ch++) {
			/* Set up driver's info for lower half */
			iwl_legacy_mod_ht40_chan_info(priv, ieeeband,
						eeprom_ch_index[ch],
						&eeprom_ch_info[ch],
						IEEE80211_CHAN_NO_HT40PLUS);

			/* Set up driver's info for upper half */
			iwl_legacy_mod_ht40_chan_info(priv, ieeeband,
						eeprom_ch_index[ch] + 4,
						&eeprom_ch_info[ch],
						IEEE80211_CHAN_NO_HT40MINUS);
		}
	}

	return 0;
}
EXPORT_SYMBOL(iwl_legacy_init_channel_map);

/*
 * iwl_legacy_free_channel_map - undo allocations in iwl_legacy_init_channel_map
 */
void iwl_legacy_free_channel_map(struct iwl_priv *priv)
{
	kfree(priv->channel_info);
	priv->channel_count = 0;
}
EXPORT_SYMBOL(iwl_legacy_free_channel_map);

/**
 * iwl_legacy_get_channel_info - Find driver's private channel info
 *
 * Based on band and channel number.
 */
const struct
iwl_channel_info *iwl_legacy_get_channel_info(const struct iwl_priv *priv,
					enum ieee80211_band band, u16 channel)
{
	int i;

	switch (band) {
	case IEEE80211_BAND_5GHZ:
		for (i = 14; i < priv->channel_count; i++) {
			if (priv->channel_info[i].channel == channel)
				return &priv->channel_info[i];
		}
		break;
	case IEEE80211_BAND_2GHZ:
		if (channel >= 1 && channel <= 14)
			return &priv->channel_info[channel - 1];
		break;
	default:
		BUG();
	}

	return NULL;
}
EXPORT_SYMBOL(iwl_legacy_get_channel_info);
Commit	Line	Data
be663ab6 WYG	1	/******************************************************************************
	2	*
	3	* This file is provided under a dual BSD/GPLv2 license. When using or
	4	* redistributing this file, you may do so under either license.
	5	*
	6	* GPL LICENSE SUMMARY
	7	*
	8	* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of version 2 of the GNU General Public License as
	12	* published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
	22	* USA
	23	*
	24	* The full GNU General Public License is included in this distribution
	25	* in the file called LICENSE.GPL.
	26	*
	27	* Contact Information:
	28	* Intel Linux Wireless <ilw@linux.intel.com>
	29	* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
	30	*
	31	* BSD LICENSE
	32	*
	33	* Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
	34	* All rights reserved.
	35	*
	36	* Redistribution and use in source and binary forms, with or without
	37	* modification, are permitted provided that the following conditions
	38	* are met:
	39	*
	40	* * Redistributions of source code must retain the above copyright
	41	* notice, this list of conditions and the following disclaimer.
	42	* * Redistributions in binary form must reproduce the above copyright
	43	* notice, this list of conditions and the following disclaimer in
	44	* the documentation and/or other materials provided with the
	45	* distribution.
	46	* * Neither the name Intel Corporation nor the names of its
	47	* contributors may be used to endorse or promote products derived
	48	* from this software without specific prior written permission.
	49	*
	50	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	51	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	52	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	53	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	54	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	55	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	56	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	57	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	58	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	59	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	60	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	61	*****************************************************************************/
	62
	63
	64	#include <linux/kernel.h>
65	#include <linux/module.h>
66	#include <linux/slab.h>
67	#include <linux/init.h>
68
69	#include <net/mac80211.h>
70
71	#include "iwl-commands.h"
72	#include "iwl-dev.h"
73	#include "iwl-core.h"
74	#include "iwl-debug.h"
75	#include "iwl-eeprom.h"
76	#include "iwl-io.h"
77
78	/************************ EEPROM BANDS **************************
79	*
ef33417d	80	* The iwlegacy_eeprom_band definitions below provide the mapping from the
be663ab6 WYG	81	* EEPROM contents to the specific channel number supported for each
	82	* band.
	83	*
	84	* For example, iwl_priv->eeprom.band_3_channels[4] from the band_3
	85	* definition below maps to physical channel 42 in the 5.2GHz spectrum.
	86	* The specific geography and calibration information for that channel
	87	* is contained in the eeprom map itself.
	88	*
	89	* During init, we copy the eeprom information and channel map
	90	* information into priv->channel_info_24/52 and priv->channel_map_24/52
	91	*
	92	* channel_map_24/52 provides the index in the channel_info array for a
	93	* given channel. We have to have two separate maps as there is channel
	94	* overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
	95	* band_2
	96	*
	97	* A value of 0xff stored in the channel_map indicates that the channel
	98	* is not supported by the hardware at all.
	99	*
	100	* A value of 0xfe in the channel_map indicates that the channel is not
	101	* valid for Tx with the current hardware. This means that
	102	* while the system can tune and receive on a given channel, it may not
	103	* be able to associate or transmit any frames on that
	104	* channel. There is no corresponding channel information for that
	105	* entry.
	106	*
	107	*********************************************************************/
	108
	109	/* 2.4 GHz */
ef33417d	110	const u8 iwlegacy_eeprom_band_1[14] = {
be663ab6 WYG	111	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
	112	};
	113
	114	/* 5.2 GHz bands */
ef33417d	115	static const u8 iwlegacy_eeprom_band_2[] = { /* 4915-5080MHz */
be663ab6 WYG	116	183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
	117	};
	118
ef33417d	119	static const u8 iwlegacy_eeprom_band_3[] = { /* 5170-5320MHz */
be663ab6 WYG	120	34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
	121	};
	122
ef33417d	123	static const u8 iwlegacy_eeprom_band_4[] = { /* 5500-5700MHz */
be663ab6 WYG	124	100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
	125	};
	126
ef33417d	127	static const u8 iwlegacy_eeprom_band_5[] = { /* 5725-5825MHz */
be663ab6 WYG	128	145, 149, 153, 157, 161, 165
	129	};
	130
ef33417d	131	static const u8 iwlegacy_eeprom_band_6[] = { /* 2.4 ht40 channel */
be663ab6 WYG	132	1, 2, 3, 4, 5, 6, 7
	133	};
	134
ef33417d	135	static const u8 iwlegacy_eeprom_band_7[] = { /* 5.2 ht40 channel */
be663ab6 WYG	136	36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
	137	};
	138
	139	/******************************************************************************
	140	*
	141	* EEPROM related functions
	142	*
	143	******************************************************************************/
	144
	145	static int iwl_legacy_eeprom_verify_signature(struct iwl_priv *priv)
	146	{
	147	u32 gp = iwl_read32(priv, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
	148	int ret = 0;
	149
	150	IWL_DEBUG_EEPROM(priv, "EEPROM signature=0x%08x\n", gp);
	151	switch (gp) {
	152	case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
	153	case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
	154	break;
	155	default:
	156	IWL_ERR(priv, "bad EEPROM signature,"
	157	"EEPROM_GP=0x%08x\n", gp);
	158	ret = -ENOENT;
	159	break;
	160	}
	161	return ret;
	162	}
	163
	164	const u8
	165	iwl_legacy_eeprom_query_addr(const struct iwl_priv priv, size_t offset)
	166	{
	167	BUG_ON(offset >= priv->cfg->base_params->eeprom_size);
	168	return &priv->eeprom[offset];
	169	}
	170	EXPORT_SYMBOL(iwl_legacy_eeprom_query_addr);
	171
	172	u16 iwl_legacy_eeprom_query16(const struct iwl_priv *priv, size_t offset)
	173	{
	174	if (!priv->eeprom)
	175	return 0;
	176	return (u16)priv->eeprom[offset] \| ((u16)priv->eeprom[offset + 1] << 8);
	177	}
	178	EXPORT_SYMBOL(iwl_legacy_eeprom_query16);
	179
	180	/**
	181	* iwl_legacy_eeprom_init - read EEPROM contents
	182	*
	183	* Load the EEPROM contents from adapter into priv->eeprom
	184	*
	185	* NOTE: This routine uses the non-debug IO access functions.
	186	*/
	187	int iwl_legacy_eeprom_init(struct iwl_priv *priv)
	188	{
	189	__le16 *e;
	190	u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
	191	int sz;
	192	int ret;
	193	u16 addr;
	194
	195	/* allocate eeprom */
	196	sz = priv->cfg->base_params->eeprom_size;
	197	IWL_DEBUG_EEPROM(priv, "NVM size = %d\n", sz);
	198	priv->eeprom = kzalloc(sz, GFP_KERNEL);
	199	if (!priv->eeprom) {
200	ret = -ENOMEM;
201	goto alloc_err;
202	}
203	e = (__le16 *)priv->eeprom;
204
205	priv->cfg->ops->lib->apm_ops.init(priv);
206
207	ret = iwl_legacy_eeprom_verify_signature(priv);
208	if (ret < 0) {
209	IWL_ERR(priv, "EEPROM not found, EEPROM_GP=0x%08x\n", gp);
210	ret = -ENOENT;
211	goto err;
212	}
213
214	/* Make sure driver (instead of uCode) is allowed to read EEPROM */
215	ret = priv->cfg->ops->lib->eeprom_ops.acquire_semaphore(priv);
216	if (ret < 0) {
217	IWL_ERR(priv, "Failed to acquire EEPROM semaphore.\n");
218	ret = -ENOENT;
219	goto err;
220	}
221
222	/* eeprom is an array of 16bit values */
223	for (addr = 0; addr < sz; addr += sizeof(u16)) {
224	u32 r;
225
226	_iwl_legacy_write32(priv, CSR_EEPROM_REG,
227	CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
228
229	ret = iwl_poll_bit(priv, CSR_EEPROM_REG,
230	CSR_EEPROM_REG_READ_VALID_MSK,
231	CSR_EEPROM_REG_READ_VALID_MSK,
232	IWL_EEPROM_ACCESS_TIMEOUT);
233	if (ret < 0) {
234	IWL_ERR(priv, "Time out reading EEPROM[%d]\n",
235	addr);
236	goto done;
237	}
238	r = _iwl_legacy_read_direct32(priv, CSR_EEPROM_REG);
239	e[addr / 2] = cpu_to_le16(r >> 16);
240	}
241
242	IWL_DEBUG_EEPROM(priv, "NVM Type: %s, version: 0x%x\n",
243	"EEPROM",
244	iwl_legacy_eeprom_query16(priv, EEPROM_VERSION));
245
246	ret = 0;
247	done:
248	priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);
249
250	err:
251	if (ret)
252	iwl_legacy_eeprom_free(priv);
253	/* Reset chip to save power until we load uCode during "up". */
254	iwl_legacy_apm_stop(priv);
255	alloc_err:
256	return ret;
257	}
258	EXPORT_SYMBOL(iwl_legacy_eeprom_init);
259
260	void iwl_legacy_eeprom_free(struct iwl_priv *priv)
261	{
262	kfree(priv->eeprom);
263	priv->eeprom = NULL;
264	}
265	EXPORT_SYMBOL(iwl_legacy_eeprom_free);
266
267	static void iwl_legacy_init_band_reference(const struct iwl_priv *priv,
268	int eep_band, int *eeprom_ch_count,
269	const struct iwl_eeprom_channel **eeprom_ch_info,
270	const u8 **eeprom_ch_index)
271	{
272	u32 offset = priv->cfg->ops->lib->
273	eeprom_ops.regulatory_bands[eep_band - 1];
274	switch (eep_band) {
275	case 1: /* 2.4GHz band */
ef33417d	276	*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_1);
be663ab6 WYG	277	eeprom_ch_info = (struct iwl_eeprom_channel )
be663ab6 WYG	278	iwl_legacy_eeprom_query_addr(priv, offset);
ef33417d	279	*eeprom_ch_index = iwlegacy_eeprom_band_1;
be663ab6 WYG	280	break;
be663ab6 WYG	281	case 2: /* 4.9GHz band */
ef33417d	282	*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_2);
be663ab6 WYG	283	eeprom_ch_info = (struct iwl_eeprom_channel )
be663ab6 WYG	284	iwl_legacy_eeprom_query_addr(priv, offset);
ef33417d	285	*eeprom_ch_index = iwlegacy_eeprom_band_2;
be663ab6 WYG	286	break;
be663ab6 WYG	287	case 3: /* 5.2GHz band */
ef33417d	288	*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_3);
be663ab6 WYG	289	eeprom_ch_info = (struct iwl_eeprom_channel )
be663ab6 WYG	290	iwl_legacy_eeprom_query_addr(priv, offset);
ef33417d	291	*eeprom_ch_index = iwlegacy_eeprom_band_3;
be663ab6 WYG	292	break;
be663ab6 WYG	293	case 4: /* 5.5GHz band */
ef33417d	294	*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_4);
be663ab6 WYG	295	eeprom_ch_info = (struct iwl_eeprom_channel )
be663ab6 WYG	296	iwl_legacy_eeprom_query_addr(priv, offset);
ef33417d	297	*eeprom_ch_index = iwlegacy_eeprom_band_4;
be663ab6 WYG	298	break;
be663ab6 WYG	299	case 5: /* 5.7GHz band */
ef33417d	300	*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_5);
be663ab6 WYG	301	eeprom_ch_info = (struct iwl_eeprom_channel )
be663ab6 WYG	302	iwl_legacy_eeprom_query_addr(priv, offset);
ef33417d	303	*eeprom_ch_index = iwlegacy_eeprom_band_5;
be663ab6 WYG	304	break;
be663ab6 WYG	305	case 6: /* 2.4GHz ht40 channels */
ef33417d	306	*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_6);
be663ab6 WYG	307	eeprom_ch_info = (struct iwl_eeprom_channel )
be663ab6 WYG	308	iwl_legacy_eeprom_query_addr(priv, offset);
ef33417d	309	*eeprom_ch_index = iwlegacy_eeprom_band_6;
be663ab6 WYG	310	break;
be663ab6 WYG	311	case 7: /* 5 GHz ht40 channels */
ef33417d	312	*eeprom_ch_count = ARRAY_SIZE(iwlegacy_eeprom_band_7);
be663ab6 WYG	313	eeprom_ch_info = (struct iwl_eeprom_channel )
be663ab6 WYG	314	iwl_legacy_eeprom_query_addr(priv, offset);
ef33417d	315	*eeprom_ch_index = iwlegacy_eeprom_band_7;
be663ab6 WYG	316	break;
	317	default:
	318	BUG();
	319	return;
	320	}
	321	}
	322
	323	#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
	324	? # x " " : "")
	325	/**
	326	* iwl_legacy_mod_ht40_chan_info - Copy ht40 channel info into driver's priv.
	327	*
	328	* Does not set up a command, or touch hardware.
	329	*/
	330	static int iwl_legacy_mod_ht40_chan_info(struct iwl_priv *priv,
	331	enum ieee80211_band band, u16 channel,
	332	const struct iwl_eeprom_channel *eeprom_ch,
	333	u8 clear_ht40_extension_channel)
	334	{
	335	struct iwl_channel_info *ch_info;
	336
	337	ch_info = (struct iwl_channel_info *)
	338	iwl_legacy_get_channel_info(priv, band, channel);
	339
	340	if (!iwl_legacy_is_channel_valid(ch_info))
	341	return -1;
	342
	343	IWL_DEBUG_EEPROM(priv, "HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
	344	" Ad-Hoc %ssupported\n",
	345	ch_info->channel,
	346	iwl_legacy_is_channel_a_band(ch_info) ?
	347	"5.2" : "2.4",
	348	CHECK_AND_PRINT(IBSS),
	349	CHECK_AND_PRINT(ACTIVE),
	350	CHECK_AND_PRINT(RADAR),
	351	CHECK_AND_PRINT(WIDE),
	352	CHECK_AND_PRINT(DFS),
	353	eeprom_ch->flags,
	354	eeprom_ch->max_power_avg,
	355	((eeprom_ch->flags & EEPROM_CHANNEL_IBSS)
	356	&& !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ?
	357	"" : "not ");
	358
	359	ch_info->ht40_eeprom = *eeprom_ch;
	360	ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
	361	ch_info->ht40_flags = eeprom_ch->flags;
	362	if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
	363	ch_info->ht40_extension_channel &=
	364	~clear_ht40_extension_channel;
	365
	366	return 0;
	367	}
	368
	369	#define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
	370	? # x " " : "")
	371
	372	/**
	373	* iwl_legacy_init_channel_map - Set up driver's info for all possible channels
	374	*/
	375	int iwl_legacy_init_channel_map(struct iwl_priv *priv)
	376	{
	377	int eeprom_ch_count = 0;
	378	const u8 *eeprom_ch_index = NULL;
	379	const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
380	int band, ch;
381	struct iwl_channel_info *ch_info;
382
383	if (priv->channel_count) {
384	IWL_DEBUG_EEPROM(priv, "Channel map already initialized.\n");
385	return 0;
386	}
387
388	IWL_DEBUG_EEPROM(priv, "Initializing regulatory info from EEPROM\n");
389
390	priv->channel_count =
ef33417d JL	391	ARRAY_SIZE(iwlegacy_eeprom_band_1) +
	392	ARRAY_SIZE(iwlegacy_eeprom_band_2) +
	393	ARRAY_SIZE(iwlegacy_eeprom_band_3) +
	394	ARRAY_SIZE(iwlegacy_eeprom_band_4) +
	395	ARRAY_SIZE(iwlegacy_eeprom_band_5);
be663ab6 WYG	396
	397	IWL_DEBUG_EEPROM(priv, "Parsing data for %d channels.\n",
	398	priv->channel_count);
	399
	400	priv->channel_info = kzalloc(sizeof(struct iwl_channel_info) *
	401	priv->channel_count, GFP_KERNEL);
	402	if (!priv->channel_info) {
	403	IWL_ERR(priv, "Could not allocate channel_info\n");
	404	priv->channel_count = 0;
	405	return -ENOMEM;
	406	}
	407
	408	ch_info = priv->channel_info;
	409
	410	/* Loop through the 5 EEPROM bands adding them in order to the
	411	* channel map we maintain (that contains additional information than
	412	* what just in the EEPROM) */
	413	for (band = 1; band <= 5; band++) {
	414
	415	iwl_legacy_init_band_reference(priv, band, &eeprom_ch_count,
	416	&eeprom_ch_info, &eeprom_ch_index);
	417
	418	/* Loop through each band adding each of the channels */
	419	for (ch = 0; ch < eeprom_ch_count; ch++) {
	420	ch_info->channel = eeprom_ch_index[ch];
	421	ch_info->band = (band == 1) ? IEEE80211_BAND_2GHZ :
	422	IEEE80211_BAND_5GHZ;
	423
	424	/* permanently store EEPROM's channel regulatory flags
	425	* and max power in channel info database. */
	426	ch_info->eeprom = eeprom_ch_info[ch];
	427
	428	/* Copy the run-time flags so they are there even on
	429	* invalid channels */
	430	ch_info->flags = eeprom_ch_info[ch].flags;
	431	/* First write that ht40 is not enabled, and then enable
	432	* one by one */
	433	ch_info->ht40_extension_channel =
	434	IEEE80211_CHAN_NO_HT40;
	435
	436	if (!(iwl_legacy_is_channel_valid(ch_info))) {
	437	IWL_DEBUG_EEPROM(priv,
	438	"Ch. %d Flags %x [%sGHz] - "
	439	"No traffic\n",
	440	ch_info->channel,
	441	ch_info->flags,
	442	iwl_legacy_is_channel_a_band(ch_info) ?
	443	"5.2" : "2.4");
	444	ch_info++;
	445	continue;
	446	}
	447
	448	/* Initialize regulatory-based run-time data */
	449	ch_info->max_power_avg = ch_info->curr_txpow =
	450	eeprom_ch_info[ch].max_power_avg;
	451	ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
	452	ch_info->min_power = 0;
	453
	454	IWL_DEBUG_EEPROM(priv, "Ch. %d [%sGHz] "
	455	"%s%s%s%s%s%s(0x%02x %ddBm):"
	456	" Ad-Hoc %ssupported\n",
	457	ch_info->channel,
	458	iwl_legacy_is_channel_a_band(ch_info) ?
	459	"5.2" : "2.4",
460	CHECK_AND_PRINT_I(VALID),
461	CHECK_AND_PRINT_I(IBSS),
462	CHECK_AND_PRINT_I(ACTIVE),
463	CHECK_AND_PRINT_I(RADAR),
464	CHECK_AND_PRINT_I(WIDE),
465	CHECK_AND_PRINT_I(DFS),
466	eeprom_ch_info[ch].flags,
467	eeprom_ch_info[ch].max_power_avg,
468	((eeprom_ch_info[ch].
469	flags & EEPROM_CHANNEL_IBSS)
470	&& !(eeprom_ch_info[ch].
471	flags & EEPROM_CHANNEL_RADAR))
472	? "" : "not ");
473
474	/* Set the tx_power_user_lmt to the highest power
475	* supported by any channel */
476	if (eeprom_ch_info[ch].max_power_avg >
477	priv->tx_power_user_lmt)
478	priv->tx_power_user_lmt =
479	eeprom_ch_info[ch].max_power_avg;
480
481	ch_info++;
482	}
483	}
484
485	/* Check if we do have HT40 channels */
486	if (priv->cfg->ops->lib->eeprom_ops.regulatory_bands[5] ==
487	EEPROM_REGULATORY_BAND_NO_HT40 &&
488	priv->cfg->ops->lib->eeprom_ops.regulatory_bands[6] ==
489	EEPROM_REGULATORY_BAND_NO_HT40)
490	return 0;
491
492	/* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
493	for (band = 6; band <= 7; band++) {
494	enum ieee80211_band ieeeband;
495
496	iwl_legacy_init_band_reference(priv, band, &eeprom_ch_count,
497	&eeprom_ch_info, &eeprom_ch_index);
498
499	/* EEPROM band 6 is 2.4, band 7 is 5 GHz */
500	ieeeband =
501	(band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
502
503	/* Loop through each band adding each of the channels */
504	for (ch = 0; ch < eeprom_ch_count; ch++) {
505	/* Set up driver's info for lower half */
506	iwl_legacy_mod_ht40_chan_info(priv, ieeeband,
507	eeprom_ch_index[ch],
508	&eeprom_ch_info[ch],
509	IEEE80211_CHAN_NO_HT40PLUS);
510
511	/* Set up driver's info for upper half */
512	iwl_legacy_mod_ht40_chan_info(priv, ieeeband,
513	eeprom_ch_index[ch] + 4,
514	&eeprom_ch_info[ch],
515	IEEE80211_CHAN_NO_HT40MINUS);
516	}
517	}
518
519	return 0;
520	}
521	EXPORT_SYMBOL(iwl_legacy_init_channel_map);
522
523	/*
524	* iwl_legacy_free_channel_map - undo allocations in iwl_legacy_init_channel_map
525	*/
526	void iwl_legacy_free_channel_map(struct iwl_priv *priv)
527	{
528	kfree(priv->channel_info);
529	priv->channel_count = 0;
530	}
531	EXPORT_SYMBOL(iwl_legacy_free_channel_map);
532
533	/**
534	* iwl_legacy_get_channel_info - Find driver's private channel info
535	*
536	* Based on band and channel number.
537	*/
538	const struct
539	iwl_channel_info iwl_legacy_get_channel_info(const struct iwl_priv priv,
540	enum ieee80211_band band, u16 channel)
541	{
542	int i;
543
544	switch (band) {
545	case IEEE80211_BAND_5GHZ:
546	for (i = 14; i < priv->channel_count; i++) {
547	if (priv->channel_info[i].channel == channel)
548	return &priv->channel_info[i];
549	}
550	break;
551	case IEEE80211_BAND_2GHZ:
552	if (channel >= 1 && channel <= 14)
553	return &priv->channel_info[channel - 1];
554	break;
555	default:
556	BUG();
557	}
558
559	return NULL;
560	}
561	EXPORT_SYMBOL(iwl_legacy_get_channel_info);