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// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
/*
* Copyright (C) 2005-2014, 2018-2021, 2023 Intel Corporation
* Copyright (C) 2015 Intel Mobile Communications GmbH
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/export.h>
#include "iwl-drv.h"
#include "iwl-modparams.h"
#include "iwl-nvm-utils.h"
int iwl_init_sband_channels(struct iwl_nvm_data *data,
struct ieee80211_supported_band *sband,
int n_channels, enum nl80211_band band)
{
struct ieee80211_channel *chan = &data->channels[0];
int n = 0, idx = 0;
while (idx < n_channels && chan->band != band)
chan = &data->channels[++idx];
sband->channels = &data->channels[idx];
while (idx < n_channels && chan->band == band) {
chan = &data->channels[++idx];
n++;
}
sband->n_channels = n;
return n;
}
IWL_EXPORT_SYMBOL(iwl_init_sband_channels);
#define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
#define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
void iwl_init_ht_hw_capab(struct iwl_trans *trans,
struct iwl_nvm_data *data,
struct ieee80211_sta_ht_cap *ht_info,
enum nl80211_band band,
u8 tx_chains, u8 rx_chains)
{
const struct iwl_cfg *cfg = trans->cfg;
int max_bit_rate = 0;
tx_chains = hweight8(tx_chains);
if (cfg->rx_with_siso_diversity)
rx_chains = 1;
else
rx_chains = hweight8(rx_chains);
if (!(data->sku_cap_11n_enable) ||
(iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_ALL) ||
!cfg->ht_params) {
ht_info->ht_supported = false;
return;
}
if (data->sku_cap_mimo_disabled)
rx_chains = 1;
ht_info->ht_supported = true;
ht_info->cap = IEEE80211_HT_CAP_DSSSCCK40;
if (cfg->ht_params->stbc) {
ht_info->cap |= (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
if (tx_chains > 1)
ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
}
if (cfg->ht_params->ldpc)
ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING;
if (trans->trans_cfg->mq_rx_supported ||
iwlwifi_mod_params.amsdu_size >= IWL_AMSDU_8K)
ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;
ht_info->mcs.rx_mask[0] = 0xFF;
ht_info->mcs.rx_mask[1] = 0x00;
ht_info->mcs.rx_mask[2] = 0x00;
if (rx_chains >= 2)
ht_info->mcs.rx_mask[1] = 0xFF;
if (rx_chains >= 3)
ht_info->mcs.rx_mask[2] = 0xFF;
if (cfg->ht_params->ht_greenfield_support)
ht_info->cap |= IEEE80211_HT_CAP_GRN_FLD;
ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
max_bit_rate = MAX_BIT_RATE_20_MHZ;
if (cfg->ht_params->ht40_bands & BIT(band)) {
ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
max_bit_rate = MAX_BIT_RATE_40_MHZ;
}
/* Highest supported Rx data rate */
max_bit_rate *= rx_chains;
WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
/* Tx MCS capabilities */
ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
if (tx_chains != rx_chains) {
ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
ht_info->mcs.tx_params |= ((tx_chains - 1) <<
IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
}
}
IWL_EXPORT_SYMBOL(iwl_init_ht_hw_capab);
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