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[linux/fpc-iii.git] / drivers / net / wireless / iwlwifi / iwl-nvm-parse.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 - 2014 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 COPYING.
 *
 * 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 - 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/types.h>
#include <linux/slab.h>
#include <linux/export.h>
#include "iwl-drv.h"
#include "iwl-modparams.h"
#include "iwl-nvm-parse.h"

/* NVM offsets (in words) definitions */
enum wkp_nvm_offsets {
        /* NVM HW-Section offset (in words) definitions */
        HW_ADDR = 0x15,

/* NVM SW-Section offset (in words) definitions */
        NVM_SW_SECTION = 0x1C0,
        NVM_VERSION = 0,
        RADIO_CFG = 1,
        SKU = 2,
        N_HW_ADDRS = 3,
        NVM_CHANNELS = 0x1E0 - NVM_SW_SECTION,

/* NVM calibration section offset (in words) definitions */
        NVM_CALIB_SECTION = 0x2B8,
        XTAL_CALIB = 0x316 - NVM_CALIB_SECTION
};

/* SKU Capabilities (actual values from NVM definition) */
enum nvm_sku_bits {
        NVM_SKU_CAP_BAND_24GHZ  = BIT(0),
        NVM_SKU_CAP_BAND_52GHZ  = BIT(1),
        NVM_SKU_CAP_11N_ENABLE  = BIT(2),
        NVM_SKU_CAP_11AC_ENABLE = BIT(3),
};

/* radio config bits (actual values from NVM definition) */
#define NVM_RF_CFG_DASH_MSK(x)   (x & 0x3)         /* bits 0-1   */
#define NVM_RF_CFG_STEP_MSK(x)   ((x >> 2)  & 0x3) /* bits 2-3   */
#define NVM_RF_CFG_TYPE_MSK(x)   ((x >> 4)  & 0x3) /* bits 4-5   */
#define NVM_RF_CFG_PNUM_MSK(x)   ((x >> 6)  & 0x3) /* bits 6-7   */
#define NVM_RF_CFG_TX_ANT_MSK(x) ((x >> 8)  & 0xF) /* bits 8-11  */
#define NVM_RF_CFG_RX_ANT_MSK(x) ((x >> 12) & 0xF) /* bits 12-15 */

/*
 * These are the channel numbers in the order that they are stored in the NVM
 */
static const u8 iwl_nvm_channels[] = {
        /* 2.4 GHz */
        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
        /* 5 GHz */
        36, 40, 44 , 48, 52, 56, 60, 64,
        100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144,
        149, 153, 157, 161, 165
};

#define IWL_NUM_CHANNELS        ARRAY_SIZE(iwl_nvm_channels)
#define NUM_2GHZ_CHANNELS       14
#define FIRST_2GHZ_HT_MINUS     5
#define LAST_2GHZ_HT_PLUS       9
#define LAST_5GHZ_HT            161

#define DEFAULT_MAX_TX_POWER 16

/* rate data (static) */
static struct ieee80211_rate iwl_cfg80211_rates[] = {
        { .bitrate = 1 * 10, .hw_value = 0, .hw_value_short = 0, },
        { .bitrate = 2 * 10, .hw_value = 1, .hw_value_short = 1,
          .flags = IEEE80211_RATE_SHORT_PREAMBLE, },
        { .bitrate = 5.5 * 10, .hw_value = 2, .hw_value_short = 2,
          .flags = IEEE80211_RATE_SHORT_PREAMBLE, },
        { .bitrate = 11 * 10, .hw_value = 3, .hw_value_short = 3,
          .flags = IEEE80211_RATE_SHORT_PREAMBLE, },
        { .bitrate = 6 * 10, .hw_value = 4, .hw_value_short = 4, },
        { .bitrate = 9 * 10, .hw_value = 5, .hw_value_short = 5, },
        { .bitrate = 12 * 10, .hw_value = 6, .hw_value_short = 6, },
        { .bitrate = 18 * 10, .hw_value = 7, .hw_value_short = 7, },
        { .bitrate = 24 * 10, .hw_value = 8, .hw_value_short = 8, },
        { .bitrate = 36 * 10, .hw_value = 9, .hw_value_short = 9, },
        { .bitrate = 48 * 10, .hw_value = 10, .hw_value_short = 10, },
        { .bitrate = 54 * 10, .hw_value = 11, .hw_value_short = 11, },
};
#define RATES_24_OFFS   0
#define N_RATES_24      ARRAY_SIZE(iwl_cfg80211_rates)
#define RATES_52_OFFS   4
#define N_RATES_52      (N_RATES_24 - RATES_52_OFFS)

/**
 * enum iwl_nvm_channel_flags - channel flags in NVM
 * @NVM_CHANNEL_VALID: channel is usable for this SKU/geo
 * @NVM_CHANNEL_IBSS: usable as an IBSS channel
 * @NVM_CHANNEL_ACTIVE: active scanning allowed
 * @NVM_CHANNEL_RADAR: radar detection required
 * @NVM_CHANNEL_DFS: dynamic freq selection candidate
 * @NVM_CHANNEL_WIDE: 20 MHz channel okay (?)
 * @NVM_CHANNEL_40MHZ: 40 MHz channel okay (?)
 * @NVM_CHANNEL_80MHZ: 80 MHz channel okay (?)
 * @NVM_CHANNEL_160MHZ: 160 MHz channel okay (?)
 */
enum iwl_nvm_channel_flags {
        NVM_CHANNEL_VALID = BIT(0),
        NVM_CHANNEL_IBSS = BIT(1),
        NVM_CHANNEL_ACTIVE = BIT(3),
        NVM_CHANNEL_RADAR = BIT(4),
        NVM_CHANNEL_DFS = BIT(7),
        NVM_CHANNEL_WIDE = BIT(8),
        NVM_CHANNEL_40MHZ = BIT(9),
        NVM_CHANNEL_80MHZ = BIT(10),
        NVM_CHANNEL_160MHZ = BIT(11),
};

#define CHECK_AND_PRINT_I(x)    \
        ((ch_flags & NVM_CHANNEL_##x) ? # x " " : "")

static int iwl_init_channel_map(struct device *dev, const struct iwl_cfg *cfg,
                                struct iwl_nvm_data *data,
                                const __le16 * const nvm_ch_flags)
{
        int ch_idx;
        int n_channels = 0;
        struct ieee80211_channel *channel;
        u16 ch_flags;
        bool is_5ghz;

        for (ch_idx = 0; ch_idx < IWL_NUM_CHANNELS; ch_idx++) {
                ch_flags = __le16_to_cpup(nvm_ch_flags + ch_idx);

                if (ch_idx >= NUM_2GHZ_CHANNELS &&
                    !data->sku_cap_band_52GHz_enable)
                        ch_flags &= ~NVM_CHANNEL_VALID;

                if (!(ch_flags & NVM_CHANNEL_VALID)) {
                        IWL_DEBUG_EEPROM(dev,
                                         "Ch. %d Flags %x [%sGHz] - No traffic\n",
                                         iwl_nvm_channels[ch_idx],
                                         ch_flags,
                                         (ch_idx >= NUM_2GHZ_CHANNELS) ?
                                         "5.2" : "2.4");
                        continue;
                }

                channel = &data->channels[n_channels];
                n_channels++;

                channel->hw_value = iwl_nvm_channels[ch_idx];
                channel->band = (ch_idx < NUM_2GHZ_CHANNELS) ?
                                IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
                channel->center_freq =
                        ieee80211_channel_to_frequency(
                                channel->hw_value, channel->band);

                /* TODO: Need to be dependent to the NVM */
                channel->flags = IEEE80211_CHAN_NO_HT40;
                if (ch_idx < NUM_2GHZ_CHANNELS &&
                    (ch_flags & NVM_CHANNEL_40MHZ)) {
                        if (iwl_nvm_channels[ch_idx] <= LAST_2GHZ_HT_PLUS)
                                channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
                        if (iwl_nvm_channels[ch_idx] >= FIRST_2GHZ_HT_MINUS)
                                channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
                } else if (iwl_nvm_channels[ch_idx] <= LAST_5GHZ_HT &&
                           (ch_flags & NVM_CHANNEL_40MHZ)) {
                        if ((ch_idx - NUM_2GHZ_CHANNELS) % 2 == 0)
                                channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
                        else
                                channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
                }
                if (!(ch_flags & NVM_CHANNEL_80MHZ))
                        channel->flags |= IEEE80211_CHAN_NO_80MHZ;
                if (!(ch_flags & NVM_CHANNEL_160MHZ))
                        channel->flags |= IEEE80211_CHAN_NO_160MHZ;

                if (!(ch_flags & NVM_CHANNEL_IBSS))
                        channel->flags |= IEEE80211_CHAN_NO_IR;

                if (!(ch_flags & NVM_CHANNEL_ACTIVE))
                        channel->flags |= IEEE80211_CHAN_NO_IR;

                if (ch_flags & NVM_CHANNEL_RADAR)
                        channel->flags |= IEEE80211_CHAN_RADAR;

                /* Initialize regulatory-based run-time data */

                /*
                 * Default value - highest tx power value.  max_power
                 * is not used in mvm, and is used for backwards compatibility
                 */
                channel->max_power = DEFAULT_MAX_TX_POWER;
                is_5ghz = channel->band == IEEE80211_BAND_5GHZ;
                IWL_DEBUG_EEPROM(dev,
                                 "Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x %ddBm): Ad-Hoc %ssupported\n",
                                 channel->hw_value,
                                 is_5ghz ? "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),
                                 ch_flags,
                                 channel->max_power,
                                 ((ch_flags & NVM_CHANNEL_IBSS) &&
                                  !(ch_flags & NVM_CHANNEL_RADAR))
                                        ? "" : "not ");
        }

        return n_channels;
}

static void iwl_init_vht_hw_capab(const struct iwl_cfg *cfg,
                                  struct iwl_nvm_data *data,
                                  struct ieee80211_sta_vht_cap *vht_cap)
{
        int num_ants = num_of_ant(data->valid_rx_ant);

        vht_cap->vht_supported = true;

        vht_cap->cap = IEEE80211_VHT_CAP_SHORT_GI_80 |
                       IEEE80211_VHT_CAP_RXSTBC_1 |
                       IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
                       3 << IEEE80211_VHT_CAP_BEAMFORMEE_STS_SHIFT |
                       7 << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;

        if (num_ants > 1)
                vht_cap->cap |= IEEE80211_VHT_CAP_TXSTBC;

        if (iwlwifi_mod_params.amsdu_size_8K)
                vht_cap->cap |= IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991;

        vht_cap->vht_mcs.rx_mcs_map =
                cpu_to_le16(IEEE80211_VHT_MCS_SUPPORT_0_9 << 0 |
                            IEEE80211_VHT_MCS_SUPPORT_0_9 << 2 |
                            IEEE80211_VHT_MCS_NOT_SUPPORTED << 4 |
                            IEEE80211_VHT_MCS_NOT_SUPPORTED << 6 |
                            IEEE80211_VHT_MCS_NOT_SUPPORTED << 8 |
                            IEEE80211_VHT_MCS_NOT_SUPPORTED << 10 |
                            IEEE80211_VHT_MCS_NOT_SUPPORTED << 12 |
                            IEEE80211_VHT_MCS_NOT_SUPPORTED << 14);

        if (num_ants == 1 ||
            cfg->rx_with_siso_diversity) {
                vht_cap->cap |= IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
                                IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN;
                /* this works because NOT_SUPPORTED == 3 */
                vht_cap->vht_mcs.rx_mcs_map |=
                        cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << 2);
        }

        vht_cap->vht_mcs.tx_mcs_map = vht_cap->vht_mcs.rx_mcs_map;
}

static void iwl_init_sbands(struct device *dev, const struct iwl_cfg *cfg,
                            struct iwl_nvm_data *data, const __le16 *nvm_sw,
                            bool enable_vht, u8 tx_chains, u8 rx_chains)
{
        int n_channels = iwl_init_channel_map(dev, cfg, data,
                        &nvm_sw[NVM_CHANNELS]);
        int n_used = 0;
        struct ieee80211_supported_band *sband;

        sband = &data->bands[IEEE80211_BAND_2GHZ];
        sband->band = IEEE80211_BAND_2GHZ;
        sband->bitrates = &iwl_cfg80211_rates[RATES_24_OFFS];
        sband->n_bitrates = N_RATES_24;
        n_used += iwl_init_sband_channels(data, sband, n_channels,
                                          IEEE80211_BAND_2GHZ);
        iwl_init_ht_hw_capab(cfg, data, &sband->ht_cap, IEEE80211_BAND_2GHZ,
                             tx_chains, rx_chains);

        sband = &data->bands[IEEE80211_BAND_5GHZ];
        sband->band = IEEE80211_BAND_5GHZ;
        sband->bitrates = &iwl_cfg80211_rates[RATES_52_OFFS];
        sband->n_bitrates = N_RATES_52;
        n_used += iwl_init_sband_channels(data, sband, n_channels,
                                          IEEE80211_BAND_5GHZ);
        iwl_init_ht_hw_capab(cfg, data, &sband->ht_cap, IEEE80211_BAND_5GHZ,
                             tx_chains, rx_chains);
        if (enable_vht)
                iwl_init_vht_hw_capab(cfg, data, &sband->vht_cap);

        if (n_channels != n_used)
                IWL_ERR_DEV(dev, "NVM: used only %d of %d channels\n",
                            n_used, n_channels);
}

struct iwl_nvm_data *
iwl_parse_nvm_data(struct device *dev, const struct iwl_cfg *cfg,
                   const __le16 *nvm_hw, const __le16 *nvm_sw,
                   const __le16 *nvm_calib, u8 tx_chains, u8 rx_chains)
{
        struct iwl_nvm_data *data;
        u8 hw_addr[ETH_ALEN];
        u16 radio_cfg, sku;

        data = kzalloc(sizeof(*data) +
                       sizeof(struct ieee80211_channel) * IWL_NUM_CHANNELS,
                       GFP_KERNEL);
        if (!data)
                return NULL;

        data->nvm_version = le16_to_cpup(nvm_sw + NVM_VERSION);

        radio_cfg = le16_to_cpup(nvm_sw + RADIO_CFG);
        data->radio_cfg_type = NVM_RF_CFG_TYPE_MSK(radio_cfg);
        data->radio_cfg_step = NVM_RF_CFG_STEP_MSK(radio_cfg);
        data->radio_cfg_dash = NVM_RF_CFG_DASH_MSK(radio_cfg);
        data->radio_cfg_pnum = NVM_RF_CFG_PNUM_MSK(radio_cfg);
        data->valid_tx_ant = NVM_RF_CFG_TX_ANT_MSK(radio_cfg);
        data->valid_rx_ant = NVM_RF_CFG_RX_ANT_MSK(radio_cfg);

        sku = le16_to_cpup(nvm_sw + SKU);
        data->sku_cap_band_24GHz_enable = sku & NVM_SKU_CAP_BAND_24GHZ;
        data->sku_cap_band_52GHz_enable = sku & NVM_SKU_CAP_BAND_52GHZ;
        data->sku_cap_11n_enable = sku & NVM_SKU_CAP_11N_ENABLE;
        if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_ALL)
                data->sku_cap_11n_enable = false;

        /* check overrides (some devices have wrong NVM) */
        if (cfg->valid_tx_ant)
                data->valid_tx_ant = cfg->valid_tx_ant;
        if (cfg->valid_rx_ant)
                data->valid_rx_ant = cfg->valid_rx_ant;

        if (!data->valid_tx_ant || !data->valid_rx_ant) {
                IWL_ERR_DEV(dev, "invalid antennas (0x%x, 0x%x)\n",
                            data->valid_tx_ant, data->valid_rx_ant);
                kfree(data);
                return NULL;
        }

        data->n_hw_addrs = le16_to_cpup(nvm_sw + N_HW_ADDRS);

        data->xtal_calib[0] = *(nvm_calib + XTAL_CALIB);
        data->xtal_calib[1] = *(nvm_calib + XTAL_CALIB + 1);

        /* The byte order is little endian 16 bit, meaning 214365 */
        memcpy(hw_addr, nvm_hw + HW_ADDR, ETH_ALEN);
        data->hw_addr[0] = hw_addr[1];
        data->hw_addr[1] = hw_addr[0];
        data->hw_addr[2] = hw_addr[3];
        data->hw_addr[3] = hw_addr[2];
        data->hw_addr[4] = hw_addr[5];
        data->hw_addr[5] = hw_addr[4];

        iwl_init_sbands(dev, cfg, data, nvm_sw, sku & NVM_SKU_CAP_11AC_ENABLE,
                        tx_chains, rx_chains);

        data->calib_version = 255;   /* TODO:
                                        this value will prevent some checks from
                                        failing, we need to check if this
                                        field is still needed, and if it does,
                                        where is it in the NVM*/

        return data;
}
IWL_EXPORT_SYMBOL(iwl_parse_nvm_data);