102 lines
3.5 KiB
C
102 lines
3.5 KiB
C
/*
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* Marvell Wireless LAN device driver: 802.11h
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*
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* Copyright (C) 2013, Marvell International Ltd.
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*
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* This software file (the "File") is distributed by Marvell International
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* Ltd. under the terms of the GNU General Public License Version 2, June 1991
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* (the "License"). You may use, redistribute and/or modify this File in
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* accordance with the terms and conditions of the License, a copy of which
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* is available by writing to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
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* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
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*
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* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
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* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
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* this warranty disclaimer.
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*/
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#include "main.h"
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#include "fw.h"
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/* This function appends 11h info to a buffer while joining an
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* infrastructure BSS
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*/
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static void
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mwifiex_11h_process_infra_join(struct mwifiex_private *priv, u8 **buffer,
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struct mwifiex_bssdescriptor *bss_desc)
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{
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struct mwifiex_ie_types_header *ie_header;
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struct mwifiex_ie_types_pwr_capability *cap;
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struct mwifiex_ie_types_local_pwr_constraint *constraint;
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struct ieee80211_supported_band *sband;
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u8 radio_type;
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int i;
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if (!buffer || !(*buffer))
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return;
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radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
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sband = priv->wdev->wiphy->bands[radio_type];
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cap = (struct mwifiex_ie_types_pwr_capability *)*buffer;
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cap->header.type = cpu_to_le16(WLAN_EID_PWR_CAPABILITY);
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cap->header.len = cpu_to_le16(2);
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cap->min_pwr = 0;
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cap->max_pwr = 0;
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*buffer += sizeof(*cap);
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constraint = (struct mwifiex_ie_types_local_pwr_constraint *)*buffer;
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constraint->header.type = cpu_to_le16(WLAN_EID_PWR_CONSTRAINT);
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constraint->header.len = cpu_to_le16(2);
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constraint->chan = bss_desc->channel;
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constraint->constraint = bss_desc->local_constraint;
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*buffer += sizeof(*constraint);
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ie_header = (struct mwifiex_ie_types_header *)*buffer;
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ie_header->type = cpu_to_le16(TLV_TYPE_PASSTHROUGH);
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ie_header->len = cpu_to_le16(2 * sband->n_channels + 2);
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*buffer += sizeof(*ie_header);
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*(*buffer)++ = WLAN_EID_SUPPORTED_CHANNELS;
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*(*buffer)++ = 2 * sband->n_channels;
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for (i = 0; i < sband->n_channels; i++) {
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*(*buffer)++ = ieee80211_frequency_to_channel(
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sband->channels[i].center_freq);
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*(*buffer)++ = 1; /* one channel in the subband */
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}
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}
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/* Enable or disable the 11h extensions in the firmware */
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static int mwifiex_11h_activate(struct mwifiex_private *priv, bool flag)
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{
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u32 enable = flag;
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return mwifiex_send_cmd(priv, HostCmd_CMD_802_11_SNMP_MIB,
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HostCmd_ACT_GEN_SET, DOT11H_I, &enable, true);
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}
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/* This functions processes TLV buffer for a pending BSS Join command.
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*
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* Activate 11h functionality in the firmware if the spectrum management
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* capability bit is found in the network we are joining. Also, necessary
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* TLVs are set based on requested network's 11h capability.
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*/
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void mwifiex_11h_process_join(struct mwifiex_private *priv, u8 **buffer,
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struct mwifiex_bssdescriptor *bss_desc)
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{
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if (bss_desc->sensed_11h) {
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/* Activate 11h functions in firmware, turns on capability
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* bit
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*/
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mwifiex_11h_activate(priv, true);
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bss_desc->cap_info_bitmap |= WLAN_CAPABILITY_SPECTRUM_MGMT;
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mwifiex_11h_process_infra_join(priv, buffer, bss_desc);
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} else {
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/* Deactivate 11h functions in the firmware */
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mwifiex_11h_activate(priv, false);
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bss_desc->cap_info_bitmap &= ~WLAN_CAPABILITY_SPECTRUM_MGMT;
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}
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}
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