Merge tag 'iwlwifi-next-for-kalle-2014-12-30' of https://git.kernel.org/pub/scm/linux...
[cascardo/linux.git] / drivers / net / wireless / mwifiex / 11h.c
1 /*
2  * Marvell Wireless LAN device driver: 802.11h
3  *
4  * Copyright (C) 2013-2014, Marvell International Ltd.
5  *
6  * This software file (the "File") is distributed by Marvell International
7  * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8  * (the "License").  You may use, redistribute and/or modify this File in
9  * accordance with the terms and conditions of the License, a copy of which
10  * is available by writing to the Free Software Foundation, Inc.,
11  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12  * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
13  *
14  * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16  * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
17  * this warranty disclaimer.
18  */
19
20 #include "main.h"
21 #include "fw.h"
22
23
24 /* This function appends 11h info to a buffer while joining an
25  * infrastructure BSS
26  */
27 static void
28 mwifiex_11h_process_infra_join(struct mwifiex_private *priv, u8 **buffer,
29                                struct mwifiex_bssdescriptor *bss_desc)
30 {
31         struct mwifiex_ie_types_header *ie_header;
32         struct mwifiex_ie_types_pwr_capability *cap;
33         struct mwifiex_ie_types_local_pwr_constraint *constraint;
34         struct ieee80211_supported_band *sband;
35         u8 radio_type;
36         int i;
37
38         if (!buffer || !(*buffer))
39                 return;
40
41         radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
42         sband = priv->wdev->wiphy->bands[radio_type];
43
44         cap = (struct mwifiex_ie_types_pwr_capability *)*buffer;
45         cap->header.type = cpu_to_le16(WLAN_EID_PWR_CAPABILITY);
46         cap->header.len = cpu_to_le16(2);
47         cap->min_pwr = 0;
48         cap->max_pwr = 0;
49         *buffer += sizeof(*cap);
50
51         constraint = (struct mwifiex_ie_types_local_pwr_constraint *)*buffer;
52         constraint->header.type = cpu_to_le16(WLAN_EID_PWR_CONSTRAINT);
53         constraint->header.len = cpu_to_le16(2);
54         constraint->chan = bss_desc->channel;
55         constraint->constraint = bss_desc->local_constraint;
56         *buffer += sizeof(*constraint);
57
58         ie_header = (struct mwifiex_ie_types_header *)*buffer;
59         ie_header->type = cpu_to_le16(TLV_TYPE_PASSTHROUGH);
60         ie_header->len  = cpu_to_le16(2 * sband->n_channels + 2);
61         *buffer += sizeof(*ie_header);
62         *(*buffer)++ = WLAN_EID_SUPPORTED_CHANNELS;
63         *(*buffer)++ = 2 * sband->n_channels;
64         for (i = 0; i < sband->n_channels; i++) {
65                 *(*buffer)++ = ieee80211_frequency_to_channel(
66                                         sband->channels[i].center_freq);
67                 *(*buffer)++ = 1; /* one channel in the subband */
68         }
69 }
70
71 /* Enable or disable the 11h extensions in the firmware */
72 static int mwifiex_11h_activate(struct mwifiex_private *priv, bool flag)
73 {
74         u32 enable = flag;
75
76         return mwifiex_send_cmd(priv, HostCmd_CMD_802_11_SNMP_MIB,
77                                 HostCmd_ACT_GEN_SET, DOT11H_I, &enable, true);
78 }
79
80 /* This functions processes TLV buffer for a pending BSS Join command.
81  *
82  * Activate 11h functionality in the firmware if the spectrum management
83  * capability bit is found in the network we are joining. Also, necessary
84  * TLVs are set based on requested network's 11h capability.
85  */
86 void mwifiex_11h_process_join(struct mwifiex_private *priv, u8 **buffer,
87                               struct mwifiex_bssdescriptor *bss_desc)
88 {
89         if (bss_desc->sensed_11h) {
90                 /* Activate 11h functions in firmware, turns on capability
91                  * bit
92                  */
93                 mwifiex_11h_activate(priv, true);
94                 bss_desc->cap_info_bitmap |= WLAN_CAPABILITY_SPECTRUM_MGMT;
95                 mwifiex_11h_process_infra_join(priv, buffer, bss_desc);
96         } else {
97                 /* Deactivate 11h functions in the firmware */
98                 mwifiex_11h_activate(priv, false);
99                 bss_desc->cap_info_bitmap &= ~WLAN_CAPABILITY_SPECTRUM_MGMT;
100         }
101 }