path: root/drivers/net/wireless/ath5k/pcu.c

/*
 * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
 * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
 * Copyright (c) 2007-2008 Matthew W. S. Bell  <mentor@madwifi.org>
 * Copyright (c) 2007-2008 Luis Rodriguez <mcgrof@winlab.rutgers.edu>
 * Copyright (c) 2007-2008 Pavel Roskin <proski@gnu.org>
 * Copyright (c) 2007-2008 Jiri Slaby <jirislaby@gmail.com>
 *
 * Permission to use, copy, modify, and 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.
 *
 */

/*********************************\
* Protocol Control Unit Functions *
\*********************************/

#include "ath5k.h"
#include "reg.h"
#include "debug.h"
#include "base.h"

/*******************\
* Generic functions *
\*******************/

/**
 * ath5k_hw_set_opmode - Set PCU operating mode
 *
 * @ah: The &struct ath5k_hw
 *
 * Initialize PCU for the various operating modes (AP/STA etc)
 *
 * NOTE: ah->ah_op_mode must be set before calling this.
 */
int ath5k_hw_set_opmode(struct ath5k_hw *ah)
{
	u32 pcu_reg, beacon_reg, low_id, high_id;


	/* Preserve rest settings */
	pcu_reg = ath5k_hw_reg_read(ah, AR5K_STA_ID1) & 0xffff0000;
	pcu_reg &= ~(AR5K_STA_ID1_ADHOC | AR5K_STA_ID1_AP
			| AR5K_STA_ID1_KEYSRCH_MODE
			| (ah->ah_version == AR5K_AR5210 ?
			(AR5K_STA_ID1_PWR_SV | AR5K_STA_ID1_NO_PSPOLL) : 0));

	beacon_reg = 0;

	ATH5K_TRACE(ah->ah_sc);

	switch (ah->ah_op_mode) {
	case NL80211_IFTYPE_ADHOC:
		pcu_reg |= AR5K_STA_ID1_ADHOC | AR5K_STA_ID1_KEYSRCH_MODE;
		beacon_reg |= AR5K_BCR_ADHOC;
		if (ah->ah_version == AR5K_AR5210)
			pcu_reg |= AR5K_STA_ID1_NO_PSPOLL;
		else
			AR5K_REG_DISABLE_BITS(ah, AR5K_CFG, AR5K_CFG_ADHOC);
		break;

	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_MESH_POINT:
		pcu_reg |= AR5K_STA_ID1_AP | AR5K_STA_ID1_KEYSRCH_MODE;
		beacon_reg |= AR5K_BCR_AP;
		if (ah->ah_version == AR5K_AR5210)
			pcu_reg |= AR5K_STA_ID1_NO_PSPOLL;
		else
			AR5K_REG_ENABLE_BITS(ah, AR5K_CFG, AR5K_CFG_ADHOC);
		break;

	case NL80211_IFTYPE_STATION:
		pcu_reg |= AR5K_STA_ID1_KEYSRCH_MODE
			| (ah->ah_version == AR5K_AR5210 ?
				AR5K_STA_ID1_PWR_SV : 0);
	case NL80211_IFTYPE_MONITOR:
		pcu_reg |= AR5K_STA_ID1_KEYSRCH_MODE
			| (ah->ah_version == AR5K_AR5210 ?
				AR5K_STA_ID1_NO_PSPOLL : 0);
		break;

	default:
		return -EINVAL;
	}

	/*
	 * Set PCU registers
	 */
	low_id = AR5K_LOW_ID(ah->ah_sta_id);
	high_id = AR5K_HIGH_ID(ah->ah_sta_id);
	ath5k_hw_reg_write(ah, low_id, AR5K_STA_ID0);
	ath5k_hw_reg_write(ah, pcu_reg | high_id, AR5K_STA_ID1);

	/*
	 * Set Beacon Control Register on 5210
	 */
	if (ah->ah_version == AR5K_AR5210)
		ath5k_hw_reg_write(ah, beacon_reg, AR5K_BCR);

	return 0;
}

/**
 * ath5k_hw_update - Update mib counters (mac layer statistics)
 *
 * @ah: The &struct ath5k_hw
 * @stats: The &struct ieee80211_low_level_stats we use to track
 * statistics on the driver
 *
 * Reads MIB counters from PCU and updates sw statistics. Must be
 * called after a MIB interrupt.
 */
void ath5k_hw_update_mib_counters(struct ath5k_hw *ah,
		struct ieee80211_low_level_stats  *stats)
{
	ATH5K_TRACE(ah->ah_sc);

	/* Read-And-Clear */
	stats->dot11ACKFailureCount += ath5k_hw_reg_read(ah, AR5K_ACK_FAIL);
	stats->dot11RTSFailureCount += ath5k_hw_reg_read(ah, AR5K_RTS_FAIL);
	stats->dot11RTSSuccessCount += ath5k_hw_reg_read(ah, AR5K_RTS_OK);
	stats->dot11FCSErrorCount += ath5k_hw_reg_read(ah, AR5K_FCS_FAIL);

	/* XXX: Should we use this to track beacon count ?
	 * -we read it anyway to clear the register */
	ath5k_hw_reg_read(ah, AR5K_BEACON_CNT);

	/* Reset profile count registers on 5212*/
	if (ah-></