[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / ath / ath9k / common.c

/*
 * Copyright (c) 2009 Atheros Communications Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * Module for common driver code between ath9k and ath9k_htc
 */

#include <linux/kernel.h>
#include <linux/module.h>

#include "common.h"

MODULE_AUTHOR("Atheros Communications");
MODULE_DESCRIPTION("Shared library for Atheros wireless 802.11n LAN cards.");
MODULE_LICENSE("Dual BSD/GPL");

int ath9k_cmn_padpos(__le16 frame_control)
{
	int padpos = 24;
	if (ieee80211_has_a4(frame_control)) {
		padpos += ETH_ALEN;
	}
	if (ieee80211_is_data_qos(frame_control)) {
		padpos += IEEE80211_QOS_CTL_LEN;
	}

	return padpos;
}
EXPORT_SYMBOL(ath9k_cmn_padpos);

int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb)
{
	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);

	if (tx_info->control.hw_key) {
		switch (tx_info->control.hw_key->cipher) {
		case WLAN_CIPHER_SUITE_WEP40:
		case WLAN_CIPHER_SUITE_WEP104:
			return ATH9K_KEY_TYPE_WEP;
		case WLAN_CIPHER_SUITE_TKIP:
			return ATH9K_KEY_TYPE_TKIP;
		case WLAN_CIPHER_SUITE_CCMP:
			return ATH9K_KEY_TYPE_AES;
		default:
			break;
		}
	}

	return ATH9K_KEY_TYPE_CLEAR;
}
EXPORT_SYMBOL(ath9k_cmn_get_hw_crypto_keytype);

static u32 ath9k_get_extchanmode(struct ieee80211_channel *chan,
				 enum nl80211_channel_type channel_type)
{
	u32 chanmode = 0;

	switch (chan->band) {
	case IEEE80211_BAND_2GHZ:
		switch (channel_type) {
		case NL80211_CHAN_NO_HT:
		case NL80211_CHAN_HT20:
			chanmode = CHANNEL_G_HT20;
			break;
		case NL80211_CHAN_HT40PLUS:
			chanmode = CHANNEL_G_HT40PLUS;
			break;
		case NL80211_CHAN_HT40MINUS:
			chanmode = CHANNEL_G_HT40MINUS;
			break;
		}
		break;
	case IEEE80211_BAND_5GHZ:
		switch (channel_type) {
		case NL80211_CHAN_NO_HT:
		case NL80211_CHAN_HT20:
			chanmode = CHANNEL_A_HT20;
			break;
		case NL80211_CHAN_HT40PLUS:
			chanmode = CHANNEL_A_HT40PLUS;
			break;
		case NL80211_CHAN_HT40MINUS:
			chanmode = CHANNEL_A_HT40MINUS;
			break;
		}
		break;
	default:
		break;
	}

	return chanmode;
}

/*
 * Update internal channel flags.
 */
void ath9k_cmn_update_ichannel(struct ath9k_channel *ichan,
			       struct ieee80211_channel *chan,
			       enum nl80211_channel_type channel_type)
{
	ichan->channel = chan->center_freq;
	ichan->chan = chan;

	if (chan->band == IEEE80211_BAND_2GHZ) {
		ichan->chanmode = CHANNEL_G;
		ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
	} else {
		ichan->chanmode = CHANNEL_A;
		ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
	}

	if (channel_type != NL80211_CHAN_NO_HT)
		ichan->chanmode = ath9k_get_extchanmode(chan, channel_type);
}
EXPORT_SYMBOL(ath9k_cmn_update_ichannel);

/*
 * Get the internal channel reference.
 */
struct ath9k_channel *ath9k_cmn_get_curchannel(struct ieee80211_hw *hw,
					       struct ath_hw *ah)
{
	struct ieee80211_channel *curchan = hw->conf.channel;
	struct ath9k_channel *channel;
	u8 chan_idx;

	chan_idx = curchan->hw_value;
	channel = &ah->channels[chan_idx];
	ath9k_cmn_update_ichannel(channel, curchan, hw->conf.channel_type);

	return channel;
}
EXPORT_SYMBOL(ath9k_cmn_get_curchannel);

int ath9k_cmn_count_streams(unsigned int chainmask, int max)
{
	int streams = 0;

	do {
		if (++streams == max)
			break;
	} while ((chainmask = chainmask & (chainmask - 1)));

	return streams;
}
EXPORT_SYMBOL(ath9k_cmn_count_streams);

/*
 * Configures appropriate weight based on stomp type.
 */
void ath9k_cmn_btcoex_bt_stomp(struct ath_common *common,
				  enum ath_stomp_type stomp_type)
{
	struct ath_hw *ah = common->ah;

	switch (stomp_type) {
	case ATH_BTCOEX_STOMP_ALL:
		ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
					   AR_STOMP_ALL_WLAN_WGHT);
		break;
	case ATH_BTCOEX_STOMP_LOW:
		ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
					   AR_STOMP_LOW_WLAN_WGHT);
		break;
	case ATH_BTCOEX_STOMP_NONE:
		ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
					   AR_STOMP_NONE_WLAN_WGHT);
		break;
	default:
		ath_dbg(common, ATH_DBG_BTCOEX,
			"Invalid Stomptype\n");
		break;
	}

	ath9k_hw_btcoex_enable(ah);
}
EXPORT_SYMBOL(ath9k_cmn_btcoex_bt_stomp);

static int __init ath9k_cmn_init(void)
{
	return 0;
}
module_init(ath9k_cmn_init);

static void __exit ath9k_cmn_exit(void)
{
	return;
}
module_exit(ath9k_cmn_exit);
Commit	Line	Data
db86f07e LR	1	/*
	2	* Copyright (c) 2009 Atheros Communications Inc.
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	11	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	13	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	14	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16
	17	/*
	18	* Module for common driver code between ath9k and ath9k_htc
	19	*/
	20
	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
	23
	24	#include "common.h"
	25
	26	MODULE_AUTHOR("Atheros Communications");
	27	MODULE_DESCRIPTION("Shared library for Atheros wireless 802.11n LAN cards.");
	28	MODULE_LICENSE("Dual BSD/GPL");
	29
1bc14880 BP	30	int ath9k_cmn_padpos(__le16 frame_control)
	31	{
	32	int padpos = 24;
	33	if (ieee80211_has_a4(frame_control)) {
	34	padpos += ETH_ALEN;
	35	}
	36	if (ieee80211_is_data_qos(frame_control)) {
	37	padpos += IEEE80211_QOS_CTL_LEN;
	38	}
	39
	40	return padpos;
	41	}
	42	EXPORT_SYMBOL(ath9k_cmn_padpos);
	43
fb9987d0 S	44	int ath9k_cmn_get_hw_crypto_keytype(struct sk_buff *skb)
	45	{
	46	struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
	47
	48	if (tx_info->control.hw_key) {
97359d12 JB	49	switch (tx_info->control.hw_key->cipher) {
	50	case WLAN_CIPHER_SUITE_WEP40:
	51	case WLAN_CIPHER_SUITE_WEP104:
fb9987d0	52	return ATH9K_KEY_TYPE_WEP;
97359d12	53	case WLAN_CIPHER_SUITE_TKIP:
fb9987d0	54	return ATH9K_KEY_TYPE_TKIP;
97359d12	55	case WLAN_CIPHER_SUITE_CCMP:
fb9987d0	56	return ATH9K_KEY_TYPE_AES;
97359d12 JB	57	default:
	58	break;
	59	}
fb9987d0 S	60	}
	61
	62	return ATH9K_KEY_TYPE_CLEAR;
	63	}
	64	EXPORT_SYMBOL(ath9k_cmn_get_hw_crypto_keytype);
	65
fb9987d0 S	66	static u32 ath9k_get_extchanmode(struct ieee80211_channel *chan,
	67	enum nl80211_channel_type channel_type)
	68	{
	69	u32 chanmode = 0;
	70
	71	switch (chan->band) {
	72	case IEEE80211_BAND_2GHZ:
	73	switch (channel_type) {
	74	case NL80211_CHAN_NO_HT:
	75	case NL80211_CHAN_HT20:
	76	chanmode = CHANNEL_G_HT20;
	77	break;
	78	case NL80211_CHAN_HT40PLUS:
	79	chanmode = CHANNEL_G_HT40PLUS;
	80	break;
	81	case NL80211_CHAN_HT40MINUS:
	82	chanmode = CHANNEL_G_HT40MINUS;
	83	break;
	84	}
	85	break;
	86	case IEEE80211_BAND_5GHZ:
	87	switch (channel_type) {
	88	case NL80211_CHAN_NO_HT:
	89	case NL80211_CHAN_HT20:
	90	chanmode = CHANNEL_A_HT20;
	91	break;
	92	case NL80211_CHAN_HT40PLUS:
	93	chanmode = CHANNEL_A_HT40PLUS;
	94	break;
	95	case NL80211_CHAN_HT40MINUS:
	96	chanmode = CHANNEL_A_HT40MINUS;
	97	break;
	98	}
	99	break;
	100	default:
	101	break;
	102	}
	103
	104	return chanmode;
	105	}
	106
	107	/*
	108	* Update internal channel flags.
	109	*/
babcbc29 FF	110	void ath9k_cmn_update_ichannel(struct ath9k_channel *ichan,
	111	struct ieee80211_channel *chan,
	112	enum nl80211_channel_type channel_type)
fb9987d0	113	{
fb9987d0 S	114	ichan->channel = chan->center_freq;
	115	ichan->chan = chan;
	116
	117	if (chan->band == IEEE80211_BAND_2GHZ) {
	118	ichan->chanmode = CHANNEL_G;
	119	ichan->channelFlags = CHANNEL_2GHZ \| CHANNEL_OFDM \| CHANNEL_G;
	120	} else {
	121	ichan->chanmode = CHANNEL_A;
	122	ichan->channelFlags = CHANNEL_5GHZ \| CHANNEL_OFDM;
	123	}
	124
babcbc29 FF	125	if (channel_type != NL80211_CHAN_NO_HT)
babcbc29 FF	126	ichan->chanmode = ath9k_get_extchanmode(chan, channel_type);
fb9987d0 S	127	}
	128	EXPORT_SYMBOL(ath9k_cmn_update_ichannel);
	129
	130	/*
	131	* Get the internal channel reference.
	132	*/
	133	struct ath9k_channel ath9k_cmn_get_curchannel(struct ieee80211_hw hw,
	134	struct ath_hw *ah)
	135	{
	136	struct ieee80211_channel *curchan = hw->conf.channel;
	137	struct ath9k_channel *channel;
	138	u8 chan_idx;
	139
	140	chan_idx = curchan->hw_value;
	141	channel = &ah->channels[chan_idx];
babcbc29	142	ath9k_cmn_update_ichannel(channel, curchan, hw->conf.channel_type);
fb9987d0 S	143
	144	return channel;
	145	}
	146	EXPORT_SYMBOL(ath9k_cmn_get_curchannel);
	147
61389f3e S	148	int ath9k_cmn_count_streams(unsigned int chainmask, int max)
	149	{
	150	int streams = 0;
	151
	152	do {
	153	if (++streams == max)
	154	break;
	155	} while ((chainmask = chainmask & (chainmask - 1)));
	156
	157	return streams;
	158	}
	159	EXPORT_SYMBOL(ath9k_cmn_count_streams);
	160
d99eeb87 VN	161	/*
	162	* Configures appropriate weight based on stomp type.
	163	*/
	164	void ath9k_cmn_btcoex_bt_stomp(struct ath_common *common,
	165	enum ath_stomp_type stomp_type)
	166	{
	167	struct ath_hw *ah = common->ah;
	168
	169	switch (stomp_type) {
	170	case ATH_BTCOEX_STOMP_ALL:
	171	ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
	172	AR_STOMP_ALL_WLAN_WGHT);
	173	break;
	174	case ATH_BTCOEX_STOMP_LOW:
	175	ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
	176	AR_STOMP_LOW_WLAN_WGHT);
	177	break;
	178	case ATH_BTCOEX_STOMP_NONE:
	179	ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
	180	AR_STOMP_NONE_WLAN_WGHT);
	181	break;
	182	default:
226afe68 JP	183	ath_dbg(common, ATH_DBG_BTCOEX,
226afe68 JP	184	"Invalid Stomptype\n");
d99eeb87 VN	185	break;
	186	}
	187
	188	ath9k_hw_btcoex_enable(ah);
	189	}
	190	EXPORT_SYMBOL(ath9k_cmn_btcoex_bt_stomp);
	191
db86f07e LR	192	static int __init ath9k_cmn_init(void)
	193	{
	194	return 0;
	195	}
	196	module_init(ath9k_cmn_init);
	197
	198	static void __exit ath9k_cmn_exit(void)
	199	{
	200	return;
	201	}
	202	module_exit(ath9k_cmn_exit);