[deliverable/linux.git] / drivers / net / wireless / ath / ath9k / mci.c

/*
 * Copyright (c) 2010-2011 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.
 */

#include <linux/dma-mapping.h>
#include <linux/slab.h>

#include "ath9k.h"
#include "mci.h"

static const u8 ath_mci_duty_cycle[] = { 0, 50, 60, 70, 80, 85, 90, 95, 98 };

static struct ath_mci_profile_info*
ath_mci_find_profile(struct ath_mci_profile *mci,
		     struct ath_mci_profile_info *info)
{
	struct ath_mci_profile_info *entry;

	if (list_empty(&mci->info))
		return NULL;

	list_for_each_entry(entry, &mci->info, list) {
		if (entry->conn_handle == info->conn_handle)
			return entry;
	}
	return NULL;
}

static bool ath_mci_add_profile(struct ath_common *common,
				struct ath_mci_profile *mci,
				struct ath_mci_profile_info *info)
{
	struct ath_mci_profile_info *entry;

	if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
	    (info->type == MCI_GPM_COEX_PROFILE_VOICE))
		return false;

	if (((NUM_PROF(mci) - mci->num_sco) == ATH_MCI_MAX_ACL_PROFILE) &&
	    (info->type != MCI_GPM_COEX_PROFILE_VOICE))
		return false;

	entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
	if (!entry)
		return false;

	memcpy(entry, info, 10);
	INC_PROF(mci, info);
	list_add_tail(&entry->list, &mci->info);

	return true;
}

static void ath_mci_del_profile(struct ath_common *common,
				struct ath_mci_profile *mci,
				struct ath_mci_profile_info *entry)
{
	if (!entry)
		return;

	DEC_PROF(mci, entry);
	list_del(&entry->list);
	kfree(entry);
}

void ath_mci_flush_profile(struct ath_mci_profile *mci)
{
	struct ath_mci_profile_info *info, *tinfo;

	mci->aggr_limit = 0;

	if (list_empty(&mci->info))
		return;

	list_for_each_entry_safe(info, tinfo, &mci->info, list) {
		list_del(&info->list);
		DEC_PROF(mci, info);
		kfree(info);
	}
}

static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex)
{
	struct ath_mci_profile *mci = &btcoex->mci;
	u32 wlan_airtime = btcoex->btcoex_period *
				(100 - btcoex->duty_cycle) / 100;

	/*
	 * Scale: wlan_airtime is in ms, aggr_limit is in 0.25 ms.
	 * When wlan_airtime is less than 4ms, aggregation limit has to be
	 * adjusted half of wlan_airtime to ensure that the aggregation can fit
	 * without collision with BT traffic.
	 */
	if ((wlan_airtime <= 4) &&
	    (!mci->aggr_limit || (mci->aggr_limit > (2 * wlan_airtime))))
		mci->aggr_limit = 2 * wlan_airtime;
}

static void ath_mci_update_scheme(struct ath_softc *sc)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_mci_profile *mci = &btcoex->mci;
	struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
	struct ath_mci_profile_info *info;
	u32 num_profile = NUM_PROF(mci);

	if (mci_hw->config & ATH_MCI_CONFIG_DISABLE_TUNING)
		goto skip_tuning;

	if (num_profile == 1) {
		info = list_first_entry(&mci->info,
					struct ath_mci_profile_info,
					list);
		if (mci->num_sco) {
			if (info->T == 12)
				mci->aggr_limit = 8;
			else if (info->T == 6) {
				mci->aggr_limit = 6;
				btcoex->duty_cycle = 30;
			}
			ath_dbg(common, MCI,
				"Single SCO, aggregation limit %d 1/4 ms\n",
				mci->aggr_limit);
		} else if (mci->num_pan || mci->num_other_acl) {
			/*
			 * For single PAN/FTP profile, allocate 35% for BT
			 * to improve WLAN throughput.
			 */
			btcoex->duty_cycle = 35;
			btcoex->btcoex_period = 53;
			ath_dbg(common, MCI,
				"Single PAN/FTP bt period %d ms dutycycle %d\n",
				btcoex->duty_cycle, btcoex->btcoex_period);
		} else if (mci->num_hid) {
			btcoex->duty_cycle = 30;
			mci->aggr_limit = 6;
			ath_dbg(common, MCI,
				"Multiple attempt/timeout single HID "
				"aggregation limit 1.5 ms dutycycle 30%%\n");
		}
	} else if (num_profile == 2) {
		if (mci->num_hid == 2)
			btcoex->duty_cycle = 30;
		mci->aggr_limit = 6;
		ath_dbg(common, MCI,
			"Two BT profiles aggr limit 1.5 ms dutycycle %d%%\n",
			btcoex->duty_cycle);
	} else if (num_profile >= 3) {
		mci->aggr_limit = 4;
		ath_dbg(common, MCI,
			"Three or more profiles aggregation limit 1 ms\n");
	}

skip_tuning:
	if (IS_CHAN_2GHZ(sc->sc_ah->curchan)) {
		if (IS_CHAN_HT(sc->sc_ah->curchan))
			ath_mci_adjust_aggr_limit(btcoex);
		else
			btcoex->btcoex_period >>= 1;
	}

	ath9k_hw_btcoex_disable(sc->sc_ah);
	ath9k_btcoex_timer_pause(sc);

	if (IS_CHAN_5GHZ(sc->sc_ah->curchan))
		return;

	btcoex->duty_cycle += (mci->num_bdr ? ATH_MCI_MAX_DUTY_CYCLE : 0);
	if (btcoex->duty_cycle > ATH_MCI_MAX_DUTY_CYCLE)
		btcoex->duty_cycle = ATH_MCI_MAX_DUTY_CYCLE;

	btcoex->btcoex_no_stomp =  btcoex->btcoex_period * 1000 *
		(100 - btcoex->duty_cycle) / 100;

	ath9k_hw_btcoex_enable(sc->sc_ah);
	ath9k_btcoex_timer_resume(sc);
}

static void ath_mci_cal_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
	u32 payload[4] = {0, 0, 0, 0};

	switch (opcode) {
	case MCI_GPM_BT_CAL_REQ:
		if (ar9003_mci_state(ah, MCI_STATE_BT, NULL) == MCI_BT_AWAKE) {
			ar9003_mci_state(ah, MCI_STATE_SET_BT_CAL_START, NULL);
			ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
		} else {
			ath_dbg(common, MCI, "MCI State mismatch: %d\n",
				ar9003_mci_state(ah, MCI_STATE_BT, NULL));
		}
		break;
	case MCI_GPM_BT_CAL_DONE:
		ar9003_mci_state(ah, MCI_STATE_BT, NULL);
		break;
	case MCI_GPM_BT_CAL_GRANT:
		MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_DONE);
		ar9003_mci_send_message(sc->sc_ah, MCI_GPM, 0, payload,
					16, false, true);
		break;
	default:
		ath_dbg(common, MCI, "Unknown GPM CAL message\n");
		break;
	}
}

static void ath9k_mci_work(struct work_struct *work)
{
	struct ath_softc *sc = container_of(work, struct ath_softc, mci_work);

	ath_mci_update_scheme(sc);
}

static void ath_mci_process_profile(struct ath_softc *sc,
				    struct ath_mci_profile_info *info)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_mci_profile *mci = &btcoex->mci;
	struct ath_mci_profile_info *entry = NULL;

	entry = ath_mci_find_profile(mci, info);
	if (entry)
		memcpy(entry, info, 10);

	if (info->start) {
		if (!entry && !ath_mci_add_profile(common, mci, info))
			return;
	} else
		ath_mci_del_profile(common, mci, entry);

	btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD;
	mci->aggr_limit = mci->num_sco ? 6 : 0;

	if (NUM_PROF(mci)) {
		btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
		btcoex->duty_cycle = ath_mci_duty_cycle[NUM_PROF(mci)];
	} else {
		btcoex->bt_stomp_type = mci->num_mgmt ? ATH_BTCOEX_STOMP_ALL :
							ATH_BTCOEX_STOMP_LOW;
		btcoex->duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
	}

	ieee80211_queue_work(sc->hw, &sc->mci_work);
}

static void ath_mci_process_status(struct ath_softc *sc,
				   struct ath_mci_profile_status *status)
{
	struct ath_btcoex *btcoex = &sc->btcoex;
	struct ath_mci_profile *mci = &btcoex->mci;
	struct ath_mci_profile_info info;
	int i = 0, old_num_mgmt = mci->num_mgmt;

	/* Link status type are not handled */
	if (status->is_link)
		return;

	info.conn_handle = status->conn_handle;
	if (ath_mci_find_profile(mci, &info))
		return;

	if (status->conn_handle >= ATH_MCI_MAX_PROFILE)
		return;

	if (status->is_critical)
		__set_bit(status->conn_handle, mci->status);
	else
		__clear_bit(status->conn_handle, mci->status);

	mci->num_mgmt = 0;
	do {
		if (test_bit(i, mci->status))
			mci->num_mgmt++;
	} while (++i < ATH_MCI_MAX_PROFILE);

	if (old_num_mgmt != mci->num_mgmt)
		ieee80211_queue_work(sc->hw, &sc->mci_work);
}

static void ath_mci_msg(struct ath_softc *sc, u8 opcode, u8 *rx_payload)
{
	struct ath_hw *ah = sc->sc_ah;
	struct ath_mci_profile_info profile_info;
	struct ath_mci_profile_status profile_status;
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	u32 version;
	u8 major;
	u8 minor;
	u32 seq_num;

	switch (opcode) {
	case MCI_GPM_COEX_VERSION_QUERY:
		version = ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_COEX_VERSION,
					   NULL);
		break;
	case MCI_GPM_COEX_VERSION_RESPONSE:
		major = *(rx_payload + MCI_GPM_COEX_B_MAJOR_VERSION);
		minor = *(rx_payload + MCI_GPM_COEX_B_MINOR_VERSION);
		version = (major << 8) + minor;
		version = ar9003_mci_state(ah, MCI_STATE_SET_BT_COEX_VERSION,
					   &version);
		break;
	case MCI_GPM_COEX_STATUS_QUERY:
		ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_CHANNELS, NULL);
		break;
	case MCI_GPM_COEX_BT_PROFILE_INFO:
		memcpy(&profile_info,
		       (rx_payload + MCI_GPM_COEX_B_PROFILE_TYPE), 10);

		if ((profile_info.type == MCI_GPM_COEX_PROFILE_UNKNOWN) ||
		    (profile_info.type >= MCI_GPM_COEX_PROFILE_MAX)) {
			ath_dbg(common, MCI,
				"Illegal profile type = %d, state = %d\n",
				profile_info.type,
				profile_info.start);
			break;
		}

		ath_mci_process_profile(sc, &profile_info);
		break;
	case MCI_GPM_COEX_BT_STATUS_UPDATE:
		profile_status.is_link = *(rx_payload +
					   MCI_GPM_COEX_B_STATUS_TYPE);
		profile_status.conn_handle = *(rx_payload +
					       MCI_GPM_COEX_B_STATUS_LINKID);
		profile_status.is_critical = *(rx_payload +
					       MCI_GPM_COEX_B_STATUS_STATE);

		seq_num = *((u32 *)(rx_payload + 12));
		ath_dbg(common, MCI,
			"BT_Status_Update: is_link=%d, linkId=%d, state=%d, SEQ=%d\n",
			profile_status.is_link, profile_status.conn_handle,
			profile_status.is_critical, seq_num);

		ath_mci_process_status(sc, &profile_status);
		break;
	default:
		ath_dbg(common, MCI, "Unknown GPM COEX message = 0x%02x\n", opcode);
		break;
	}
}

int ath_mci_setup(struct ath_softc *sc)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_mci_coex *mci = &sc->mci_coex;
	struct ath_mci_buf *buf = &mci->sched_buf;

	buf->bf_addr = dma_alloc_coherent(sc->dev,
				  ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
				  &buf->bf_paddr, GFP_KERNEL);

	if (buf->bf_addr == NULL) {
		ath_dbg(common, FATAL, "MCI buffer alloc failed\n");
		return -ENOMEM;
	}

	memset(buf->bf_addr, MCI_GPM_RSVD_PATTERN,
	       ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE);

	mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE;

	mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE;
	mci->gpm_buf.bf_addr = (u8 *)mci->sched_buf.bf_addr + mci->sched_buf.bf_len;
	mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len;

	ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr,
			 mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
			 mci->sched_buf.bf_paddr);

	INIT_WORK(&sc->mci_work, ath9k_mci_work);
	ath_dbg(common, MCI, "MCI Initialized\n");

	return 0;
}

void ath_mci_cleanup(struct ath_softc *sc)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	struct ath_hw *ah = sc->sc_ah;
	struct ath_mci_coex *mci = &sc->mci_coex;
	struct ath_mci_buf *buf = &mci->sched_buf;

	if (buf->bf_addr)
		dma_free_coherent(sc->dev,
				  ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
				  buf->bf_addr, buf->bf_paddr);

	ar9003_mci_cleanup(ah);

	ath_dbg(common, MCI, "MCI De-Initialized\n");
}

void ath_mci_intr(struct ath_softc *sc)
{
	struct ath_mci_coex *mci = &sc->mci_coex;
	struct ath_hw *ah = sc->sc_ah;
	struct ath_common *common = ath9k_hw_common(ah);
	u32 mci_int, mci_int_rxmsg;
	u32 offset, subtype, opcode;
	u32 *pgpm;
	u32 more_data = MCI_GPM_MORE;
	bool skip_gpm = false;

	ar9003_mci_get_interrupt(sc->sc_ah, &mci_int, &mci_int_rxmsg);

	if (ar9003_mci_state(ah, MCI_STATE_ENABLE, NULL) == 0) {
		ar9003_mci_state(ah, MCI_STATE_INIT_GPM_OFFSET, NULL);
		return;
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE) {
		u32 payload[4] = { 0xffffffff, 0xffffffff,
				   0xffffffff, 0xffffff00};

		/*
		 * The following REMOTE_RESET and SYS_WAKING used to sent
		 * only when BT wake up. Now they are always sent, as a
		 * recovery method to reset BT MCI's RX alignment.
		 */
		ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0,
					payload, 16, true, false);
		ar9003_mci_send_message(ah, MCI_SYS_WAKING, 0,
					NULL, 0, true, false);

		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE;
		ar9003_mci_state(ah, MCI_STATE_RESET_REQ_WAKE, NULL);

		/*
		 * always do this for recovery and 2G/5G toggling and LNA_TRANS
		 */
		ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE, NULL);
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING) {
		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING;

		if (ar9003_mci_state(ah, MCI_STATE_BT, NULL) == MCI_BT_SLEEP) {
			if (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP, NULL) !=
			    MCI_BT_SLEEP)
				ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE,
						 NULL);
		}
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) {
		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING;

		if (ar9003_mci_state(ah, MCI_STATE_BT, NULL) == MCI_BT_AWAKE) {
			if (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP, NULL) !=
			    MCI_BT_AWAKE)
				ar9003_mci_state(ah, MCI_STATE_SET_BT_SLEEP,
						 NULL);
		}
	}

	if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
	    (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
		ar9003_mci_state(ah, MCI_STATE_RECOVER_RX, NULL);
		skip_gpm = true;
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO) {
		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO;
		offset = ar9003_mci_state(ah, MCI_STATE_LAST_SCHD_MSG_OFFSET,
					  NULL);
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_GPM) {
		mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_GPM;

		while (more_data == MCI_GPM_MORE) {

			pgpm = mci->gpm_buf.bf_addr;
			offset = ar9003_mci_state(ah, MCI_STATE_NEXT_GPM_OFFSET,
						  &more_data);

			if (offset == MCI_GPM_INVALID)
				break;

			pgpm += (offset >> 2);

			/*
			 * The first dword is timer.
			 * The real data starts from 2nd dword.
			 */
			subtype = MCI_GPM_TYPE(pgpm);
			opcode = MCI_GPM_OPCODE(pgpm);

			if (skip_gpm)
				goto recycle;

			if (MCI_GPM_IS_CAL_TYPE(subtype)) {
				ath_mci_cal_msg(sc, subtype, (u8 *)pgpm);
			} else {
				switch (subtype) {
				case MCI_GPM_COEX_AGENT:
					ath_mci_msg(sc, opcode, (u8 *)pgpm);
					break;
				default:
					break;
				}
			}
		recycle:
			MCI_GPM_RECYCLE(pgpm);
		}
	}

	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_HW_MSG_MASK) {
		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL)
			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL;

		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_INFO)
			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_INFO;

		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO) {
			int value_dbm = ar9003_mci_state(ah,
						 MCI_STATE_CONT_RSSI_POWER, NULL);

			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_INFO;

			if (ar9003_mci_state(ah, MCI_STATE_CONT_TXRX, NULL))
				ath_dbg(common, MCI,
					"MCI CONT_INFO: (tx) pri = %d, pwr = %d dBm\n",
					ar9003_mci_state(ah,
						 MCI_STATE_CONT_PRIORITY, NULL),
					value_dbm);
			else
				ath_dbg(common, MCI,
					"MCI CONT_INFO: (rx) pri = %d,pwr = %d dBm\n",
					ar9003_mci_state(ah,
						 MCI_STATE_CONT_PRIORITY, NULL),
					value_dbm);
		}

		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_NACK)
			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_NACK;

		if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_RST)
			mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_RST;
	}

	if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) ||
	    (mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT))
		mci_int &= ~(AR_MCI_INTERRUPT_RX_INVALID_HDR |
			     AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT);
}

void ath_mci_enable(struct ath_softc *sc)
{
	struct ath_common *common = ath9k_hw_common(sc->sc_ah);

	if (!common->btcoex_enabled)
		return;

	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
		sc->sc_ah->imask |= ATH9K_INT_MCI;
}
Commit	Line	Data
7dc181c2 RM	1	/*
	2	* Copyright (c) 2010-2011 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
9e25365f MSS	17	#include <linux/dma-mapping.h>
	18	#include <linux/slab.h>
	19
7dc181c2 RM	20	#include "ath9k.h"
	21	#include "mci.h"
	22
6ec414fd	23	static const u8 ath_mci_duty_cycle[] = { 0, 50, 60, 70, 80, 85, 90, 95, 98 };
7dc181c2 RM	24
	25	static struct ath_mci_profile_info*
	26	ath_mci_find_profile(struct ath_mci_profile *mci,
	27	struct ath_mci_profile_info *info)
	28	{
	29	struct ath_mci_profile_info *entry;
	30
9e2e0c84 RM	31	if (list_empty(&mci->info))
	32	return NULL;
	33
7dc181c2 RM	34	list_for_each_entry(entry, &mci->info, list) {
7dc181c2 RM	35	if (entry->conn_handle == info->conn_handle)
9e2e0c84	36	return entry;
7dc181c2	37	}
9e2e0c84	38	return NULL;
7dc181c2 RM	39	}
	40
	41	static bool ath_mci_add_profile(struct ath_common *common,
	42	struct ath_mci_profile *mci,
	43	struct ath_mci_profile_info *info)
	44	{
	45	struct ath_mci_profile_info *entry;
	46
	47	if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
682dd04b	48	(info->type == MCI_GPM_COEX_PROFILE_VOICE))
7dc181c2	49	return false;
7dc181c2 RM	50
7dc181c2 RM	51	if (((NUM_PROF(mci) - mci->num_sco) == ATH_MCI_MAX_ACL_PROFILE) &&
682dd04b	52	(info->type != MCI_GPM_COEX_PROFILE_VOICE))
7dc181c2	53	return false;
7dc181c2	54
3c7992e3	55	entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
9e2e0c84 RM	56	if (!entry)
9e2e0c84 RM	57	return false;
7dc181c2	58
9e2e0c84 RM	59	memcpy(entry, info, 10);
	60	INC_PROF(mci, info);
	61	list_add_tail(&entry->list, &mci->info);
682dd04b	62
7dc181c2 RM	63	return true;
	64	}
	65
	66	static void ath_mci_del_profile(struct ath_common *common,
	67	struct ath_mci_profile *mci,
9e2e0c84	68	struct ath_mci_profile_info *entry)
7dc181c2	69	{
682dd04b	70	if (!entry)
7dc181c2	71	return;
682dd04b	72
7dc181c2 RM	73	DEC_PROF(mci, entry);
	74	list_del(&entry->list);
	75	kfree(entry);
	76	}
	77
	78	void ath_mci_flush_profile(struct ath_mci_profile *mci)
	79	{
	80	struct ath_mci_profile_info info, tinfo;
	81
9e2e0c84 RM	82	mci->aggr_limit = 0;
	83
	84	if (list_empty(&mci->info))
	85	return;
	86
7dc181c2 RM	87	list_for_each_entry_safe(info, tinfo, &mci->info, list) {
	88	list_del(&info->list);
	89	DEC_PROF(mci, info);
	90	kfree(info);
	91	}
7dc181c2 RM	92	}
	93
	94	static void ath_mci_adjust_aggr_limit(struct ath_btcoex *btcoex)
	95	{
	96	struct ath_mci_profile *mci = &btcoex->mci;
	97	u32 wlan_airtime = btcoex->btcoex_period *
	98	(100 - btcoex->duty_cycle) / 100;
	99
	100	/*
	101	* Scale: wlan_airtime is in ms, aggr_limit is in 0.25 ms.
	102	* When wlan_airtime is less than 4ms, aggregation limit has to be
	103	* adjusted half of wlan_airtime to ensure that the aggregation can fit
	104	* without collision with BT traffic.
	105	*/
	106	if ((wlan_airtime <= 4) &&
	107	(!mci->aggr_limit \|\| (mci->aggr_limit > (2 * wlan_airtime))))
	108	mci->aggr_limit = 2 * wlan_airtime;
	109	}
	110
	111	static void ath_mci_update_scheme(struct ath_softc *sc)
	112	{
	113	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	114	struct ath_btcoex *btcoex = &sc->btcoex;
	115	struct ath_mci_profile *mci = &btcoex->mci;
0603143e	116	struct ath9k_hw_mci *mci_hw = &sc->sc_ah->btcoex_hw.mci;
7dc181c2 RM	117	struct ath_mci_profile_info *info;
	118	u32 num_profile = NUM_PROF(mci);
	119
0603143e RM	120	if (mci_hw->config & ATH_MCI_CONFIG_DISABLE_TUNING)
	121	goto skip_tuning;
	122
7dc181c2 RM	123	if (num_profile == 1) {
	124	info = list_first_entry(&mci->info,
	125	struct ath_mci_profile_info,
	126	list);
0603143e RM	127	if (mci->num_sco) {
	128	if (info->T == 12)
	129	mci->aggr_limit = 8;
	130	else if (info->T == 6) {
	131	mci->aggr_limit = 6;
	132	btcoex->duty_cycle = 30;
	133	}
d2182b69	134	ath_dbg(common, MCI,
0603143e RM	135	"Single SCO, aggregation limit %d 1/4 ms\n",
	136	mci->aggr_limit);
	137	} else if (mci->num_pan \|\| mci->num_other_acl) {
	138	/*
	139	* For single PAN/FTP profile, allocate 35% for BT
	140	* to improve WLAN throughput.
	141	*/
	142	btcoex->duty_cycle = 35;
	143	btcoex->btcoex_period = 53;
d2182b69	144	ath_dbg(common, MCI,
0603143e RM	145	"Single PAN/FTP bt period %d ms dutycycle %d\n",
	146	btcoex->duty_cycle, btcoex->btcoex_period);
	147	} else if (mci->num_hid) {
7dc181c2	148	btcoex->duty_cycle = 30;
0603143e	149	mci->aggr_limit = 6;
d2182b69	150	ath_dbg(common, MCI,
7dc181c2	151	"Multiple attempt/timeout single HID "
0603143e	152	"aggregation limit 1.5 ms dutycycle 30%%\n");
7dc181c2	153	}
0603143e RM	154	} else if (num_profile == 2) {
	155	if (mci->num_hid == 2)
	156	btcoex->duty_cycle = 30;
7dc181c2	157	mci->aggr_limit = 6;
d2182b69	158	ath_dbg(common, MCI,
0603143e RM	159	"Two BT profiles aggr limit 1.5 ms dutycycle %d%%\n",
	160	btcoex->duty_cycle);
	161	} else if (num_profile >= 3) {
	162	mci->aggr_limit = 4;
	163	ath_dbg(common, MCI,
	164	"Three or more profiles aggregation limit 1 ms\n");
7dc181c2 RM	165	}
7dc181c2 RM	166
0603143e	167	skip_tuning:
7dc181c2 RM	168	if (IS_CHAN_2GHZ(sc->sc_ah->curchan)) {
	169	if (IS_CHAN_HT(sc->sc_ah->curchan))
	170	ath_mci_adjust_aggr_limit(btcoex);
	171	else
	172	btcoex->btcoex_period >>= 1;
	173	}
	174
	175	ath9k_hw_btcoex_disable(sc->sc_ah);
	176	ath9k_btcoex_timer_pause(sc);
	177
	178	if (IS_CHAN_5GHZ(sc->sc_ah->curchan))
	179	return;
	180
	181	btcoex->duty_cycle += (mci->num_bdr ? ATH_MCI_MAX_DUTY_CYCLE : 0);
	182	if (btcoex->duty_cycle > ATH_MCI_MAX_DUTY_CYCLE)
	183	btcoex->duty_cycle = ATH_MCI_MAX_DUTY_CYCLE;
	184
dfd0587a	185	btcoex->btcoex_no_stomp = btcoex->btcoex_period * 1000 *
682dd04b	186	(100 - btcoex->duty_cycle) / 100;
7dc181c2 RM	187
	188	ath9k_hw_btcoex_enable(sc->sc_ah);
	189	ath9k_btcoex_timer_resume(sc);
	190	}
	191
19686ddf MSS	192	static void ath_mci_cal_msg(struct ath_softc sc, u8 opcode, u8 rx_payload)
	193	{
	194	struct ath_hw *ah = sc->sc_ah;
	195	struct ath_common *common = ath9k_hw_common(ah);
	196	u32 payload[4] = {0, 0, 0, 0};
	197
	198	switch (opcode) {
	199	case MCI_GPM_BT_CAL_REQ:
19686ddf MSS	200	if (ar9003_mci_state(ah, MCI_STATE_BT, NULL) == MCI_BT_AWAKE) {
	201	ar9003_mci_state(ah, MCI_STATE_SET_BT_CAL_START, NULL);
	202	ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
682dd04b SM	203	} else {
682dd04b SM	204	ath_dbg(common, MCI, "MCI State mismatch: %d\n",
19686ddf	205	ar9003_mci_state(ah, MCI_STATE_BT, NULL));
682dd04b	206	}
19686ddf	207	break;
19686ddf	208	case MCI_GPM_BT_CAL_DONE:
682dd04b	209	ar9003_mci_state(ah, MCI_STATE_BT, NULL);
19686ddf	210	break;
19686ddf	211	case MCI_GPM_BT_CAL_GRANT:
19686ddf MSS	212	MCI_GPM_SET_CAL_TYPE(payload, MCI_GPM_WLAN_CAL_DONE);
	213	ar9003_mci_send_message(sc->sc_ah, MCI_GPM, 0, payload,
	214	16, false, true);
	215	break;
19686ddf	216	default:
682dd04b	217	ath_dbg(common, MCI, "Unknown GPM CAL message\n");
19686ddf MSS	218	break;
	219	}
	220	}
	221
3c7992e3 RM	222	static void ath9k_mci_work(struct work_struct *work)
	223	{
	224	struct ath_softc *sc = container_of(work, struct ath_softc, mci_work);
	225
	226	ath_mci_update_scheme(sc);
	227	}
	228
e5f0a276 FF	229	static void ath_mci_process_profile(struct ath_softc *sc,
e5f0a276 FF	230	struct ath_mci_profile_info *info)
7dc181c2 RM	231	{
	232	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	233	struct ath_btcoex *btcoex = &sc->btcoex;
	234	struct ath_mci_profile *mci = &btcoex->mci;
9e2e0c84 RM	235	struct ath_mci_profile_info *entry = NULL;
	236
	237	entry = ath_mci_find_profile(mci, info);
	238	if (entry)
	239	memcpy(entry, info, 10);
7dc181c2 RM	240
7dc181c2 RM	241	if (info->start) {
9e2e0c84	242	if (!entry && !ath_mci_add_profile(common, mci, info))
7dc181c2 RM	243	return;
7dc181c2 RM	244	} else
9e2e0c84	245	ath_mci_del_profile(common, mci, entry);
7dc181c2 RM	246
	247	btcoex->btcoex_period = ATH_MCI_DEF_BT_PERIOD;
	248	mci->aggr_limit = mci->num_sco ? 6 : 0;
682dd04b	249
7dc181c2 RM	250	if (NUM_PROF(mci)) {
	251	btcoex->bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
	252	btcoex->duty_cycle = ath_mci_duty_cycle[NUM_PROF(mci)];
	253	} else {
	254	btcoex->bt_stomp_type = mci->num_mgmt ? ATH_BTCOEX_STOMP_ALL :
	255	ATH_BTCOEX_STOMP_LOW;
	256	btcoex->duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
	257	}
	258
3c7992e3	259	ieee80211_queue_work(sc->hw, &sc->mci_work);
7dc181c2 RM	260	}
7dc181c2 RM	261
e5f0a276 FF	262	static void ath_mci_process_status(struct ath_softc *sc,
e5f0a276 FF	263	struct ath_mci_profile_status *status)
7dc181c2	264	{
7dc181c2 RM	265	struct ath_btcoex *btcoex = &sc->btcoex;
	266	struct ath_mci_profile *mci = &btcoex->mci;
	267	struct ath_mci_profile_info info;
	268	int i = 0, old_num_mgmt = mci->num_mgmt;
	269
	270	/* Link status type are not handled */
682dd04b	271	if (status->is_link)
7dc181c2	272	return;
7dc181c2	273
7dc181c2	274	info.conn_handle = status->conn_handle;
682dd04b	275	if (ath_mci_find_profile(mci, &info))
7dc181c2	276	return;
682dd04b SM	277
682dd04b SM	278	if (status->conn_handle >= ATH_MCI_MAX_PROFILE)
7dc181c2	279	return;
682dd04b	280
7dc181c2 RM	281	if (status->is_critical)
	282	__set_bit(status->conn_handle, mci->status);
	283	else
	284	__clear_bit(status->conn_handle, mci->status);
	285
	286	mci->num_mgmt = 0;
	287	do {
	288	if (test_bit(i, mci->status))
	289	mci->num_mgmt++;
	290	} while (++i < ATH_MCI_MAX_PROFILE);
	291
	292	if (old_num_mgmt != mci->num_mgmt)
3c7992e3	293	ieee80211_queue_work(sc->hw, &sc->mci_work);
7dc181c2	294	}
9e25365f	295
19686ddf MSS	296	static void ath_mci_msg(struct ath_softc sc, u8 opcode, u8 rx_payload)
	297	{
	298	struct ath_hw *ah = sc->sc_ah;
	299	struct ath_mci_profile_info profile_info;
	300	struct ath_mci_profile_status profile_status;
	301	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	302	u32 version;
	303	u8 major;
	304	u8 minor;
	305	u32 seq_num;
	306
	307	switch (opcode) {
19686ddf	308	case MCI_GPM_COEX_VERSION_QUERY:
682dd04b SM	309	version = ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_COEX_VERSION,
682dd04b SM	310	NULL);
19686ddf	311	break;
19686ddf	312	case MCI_GPM_COEX_VERSION_RESPONSE:
19686ddf MSS	313	major = *(rx_payload + MCI_GPM_COEX_B_MAJOR_VERSION);
19686ddf MSS	314	minor = *(rx_payload + MCI_GPM_COEX_B_MINOR_VERSION);
19686ddf	315	version = (major << 8) + minor;
682dd04b SM	316	version = ar9003_mci_state(ah, MCI_STATE_SET_BT_COEX_VERSION,
682dd04b SM	317	&version);
19686ddf	318	break;
19686ddf	319	case MCI_GPM_COEX_STATUS_QUERY:
682dd04b	320	ar9003_mci_state(ah, MCI_STATE_SEND_WLAN_CHANNELS, NULL);
19686ddf	321	break;
19686ddf	322	case MCI_GPM_COEX_BT_PROFILE_INFO:
19686ddf MSS	323	memcpy(&profile_info,
	324	(rx_payload + MCI_GPM_COEX_B_PROFILE_TYPE), 10);
	325
682dd04b SM	326	if ((profile_info.type == MCI_GPM_COEX_PROFILE_UNKNOWN) \|\|
682dd04b SM	327	(profile_info.type >= MCI_GPM_COEX_PROFILE_MAX)) {
d2182b69	328	ath_dbg(common, MCI,
682dd04b	329	"Illegal profile type = %d, state = %d\n",
d2182b69	330	profile_info.type,
19686ddf MSS	331	profile_info.start);
	332	break;
	333	}
	334
	335	ath_mci_process_profile(sc, &profile_info);
	336	break;
19686ddf MSS	337	case MCI_GPM_COEX_BT_STATUS_UPDATE:
	338	profile_status.is_link = *(rx_payload +
	339	MCI_GPM_COEX_B_STATUS_TYPE);
	340	profile_status.conn_handle = *(rx_payload +
	341	MCI_GPM_COEX_B_STATUS_LINKID);
	342	profile_status.is_critical = *(rx_payload +
	343	MCI_GPM_COEX_B_STATUS_STATE);
	344
	345	seq_num = ((u32 )(rx_payload + 12));
d2182b69	346	ath_dbg(common, MCI,
682dd04b	347	"BT_Status_Update: is_link=%d, linkId=%d, state=%d, SEQ=%d\n",
19686ddf MSS	348	profile_status.is_link, profile_status.conn_handle,
	349	profile_status.is_critical, seq_num);
	350
	351	ath_mci_process_status(sc, &profile_status);
	352	break;
19686ddf	353	default:
682dd04b	354	ath_dbg(common, MCI, "Unknown GPM COEX message = 0x%02x\n", opcode);
19686ddf MSS	355	break;
	356	}
	357	}
9e25365f	358
9e25365f MSS	359	int ath_mci_setup(struct ath_softc *sc)
	360	{
	361	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	362	struct ath_mci_coex *mci = &sc->mci_coex;
ea510e4b	363	struct ath_mci_buf *buf = &mci->sched_buf;
9e25365f	364
ea510e4b SM	365	buf->bf_addr = dma_alloc_coherent(sc->dev,
	366	ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
	367	&buf->bf_paddr, GFP_KERNEL);
9e25365f	368
ea510e4b	369	if (buf->bf_addr == NULL) {
d2182b69	370	ath_dbg(common, FATAL, "MCI buffer alloc failed\n");
ea510e4b	371	return -ENOMEM;
9e25365f MSS	372	}
9e25365f MSS	373
ea510e4b SM	374	memset(buf->bf_addr, MCI_GPM_RSVD_PATTERN,
ea510e4b SM	375	ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE);
9e25365f	376
ea510e4b	377	mci->sched_buf.bf_len = ATH_MCI_SCHED_BUF_SIZE;
9e25365f MSS	378
9e25365f MSS	379	mci->gpm_buf.bf_len = ATH_MCI_GPM_BUF_SIZE;
ea510e4b	380	mci->gpm_buf.bf_addr = (u8 *)mci->sched_buf.bf_addr + mci->sched_buf.bf_len;
9e25365f MSS	381	mci->gpm_buf.bf_paddr = mci->sched_buf.bf_paddr + mci->sched_buf.bf_len;
9e25365f MSS	382
9e25365f MSS	383	ar9003_mci_setup(sc->sc_ah, mci->gpm_buf.bf_paddr,
	384	mci->gpm_buf.bf_addr, (mci->gpm_buf.bf_len >> 4),
	385	mci->sched_buf.bf_paddr);
ea510e4b	386
3c7992e3	387	INIT_WORK(&sc->mci_work, ath9k_mci_work);
ea510e4b SM	388	ath_dbg(common, MCI, "MCI Initialized\n");
	389
	390	return 0;
9e25365f MSS	391	}
	392
	393	void ath_mci_cleanup(struct ath_softc *sc)
	394	{
ea510e4b	395	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
9e25365f MSS	396	struct ath_hw *ah = sc->sc_ah;
9e25365f MSS	397	struct ath_mci_coex *mci = &sc->mci_coex;
ea510e4b	398	struct ath_mci_buf *buf = &mci->sched_buf;
9e25365f	399
ea510e4b SM	400	if (buf->bf_addr)
	401	dma_free_coherent(sc->dev,
	402	ATH_MCI_SCHED_BUF_SIZE + ATH_MCI_GPM_BUF_SIZE,
	403	buf->bf_addr, buf->bf_paddr);
	404
9e25365f	405	ar9003_mci_cleanup(ah);
ea510e4b SM	406
ea510e4b SM	407	ath_dbg(common, MCI, "MCI De-Initialized\n");
9e25365f	408	}
19686ddf MSS	409
	410	void ath_mci_intr(struct ath_softc *sc)
	411	{
	412	struct ath_mci_coex *mci = &sc->mci_coex;
	413	struct ath_hw *ah = sc->sc_ah;
	414	struct ath_common *common = ath9k_hw_common(ah);
	415	u32 mci_int, mci_int_rxmsg;
	416	u32 offset, subtype, opcode;
	417	u32 *pgpm;
	418	u32 more_data = MCI_GPM_MORE;
	419	bool skip_gpm = false;
	420
	421	ar9003_mci_get_interrupt(sc->sc_ah, &mci_int, &mci_int_rxmsg);
	422
	423	if (ar9003_mci_state(ah, MCI_STATE_ENABLE, NULL) == 0) {
682dd04b	424	ar9003_mci_state(ah, MCI_STATE_INIT_GPM_OFFSET, NULL);
19686ddf MSS	425	return;
	426	}
	427
	428	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE) {
	429	u32 payload[4] = { 0xffffffff, 0xffffffff,
	430	0xffffffff, 0xffffff00};
	431
	432	/*
	433	* The following REMOTE_RESET and SYS_WAKING used to sent
	434	* only when BT wake up. Now they are always sent, as a
	435	* recovery method to reset BT MCI's RX alignment.
	436	*/
19686ddf MSS	437	ar9003_mci_send_message(ah, MCI_REMOTE_RESET, 0,
19686ddf MSS	438	payload, 16, true, false);
19686ddf MSS	439	ar9003_mci_send_message(ah, MCI_SYS_WAKING, 0,
	440	NULL, 0, true, false);
	441
	442	mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_REQ_WAKE;
	443	ar9003_mci_state(ah, MCI_STATE_RESET_REQ_WAKE, NULL);
	444
	445	/*
	446	* always do this for recovery and 2G/5G toggling and LNA_TRANS
	447	*/
19686ddf MSS	448	ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE, NULL);
	449	}
	450
19686ddf MSS	451	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING) {
	452	mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_WAKING;
	453
	454	if (ar9003_mci_state(ah, MCI_STATE_BT, NULL) == MCI_BT_SLEEP) {
682dd04b SM	455	if (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP, NULL) !=
	456	MCI_BT_SLEEP)
	457	ar9003_mci_state(ah, MCI_STATE_SET_BT_AWAKE,
	458	NULL);
	459	}
19686ddf MSS	460	}
	461
	462	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING) {
19686ddf MSS	463	mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SYS_SLEEPING;
	464
	465	if (ar9003_mci_state(ah, MCI_STATE_BT, NULL) == MCI_BT_AWAKE) {
682dd04b SM	466	if (ar9003_mci_state(ah, MCI_STATE_REMOTE_SLEEP, NULL) !=
682dd04b SM	467	MCI_BT_AWAKE)
19686ddf MSS	468	ar9003_mci_state(ah, MCI_STATE_SET_BT_SLEEP,
19686ddf MSS	469	NULL);
682dd04b	470	}
19686ddf MSS	471	}
	472
	473	if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) \|\|
	474	(mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT)) {
19686ddf MSS	475	ar9003_mci_state(ah, MCI_STATE_RECOVER_RX, NULL);
	476	skip_gpm = true;
	477	}
	478
	479	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO) {
19686ddf MSS	480	mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_SCHD_INFO;
	481	offset = ar9003_mci_state(ah, MCI_STATE_LAST_SCHD_MSG_OFFSET,
	482	NULL);
	483	}
	484
	485	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_GPM) {
19686ddf MSS	486	mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_GPM;
	487
	488	while (more_data == MCI_GPM_MORE) {
	489
	490	pgpm = mci->gpm_buf.bf_addr;
682dd04b SM	491	offset = ar9003_mci_state(ah, MCI_STATE_NEXT_GPM_OFFSET,
682dd04b SM	492	&more_data);
19686ddf MSS	493
	494	if (offset == MCI_GPM_INVALID)
	495	break;
	496
	497	pgpm += (offset >> 2);
	498
	499	/*
	500	* The first dword is timer.
	501	* The real data starts from 2nd dword.
	502	*/
19686ddf MSS	503	subtype = MCI_GPM_TYPE(pgpm);
	504	opcode = MCI_GPM_OPCODE(pgpm);
	505
682dd04b SM	506	if (skip_gpm)
	507	goto recycle;
	508
	509	if (MCI_GPM_IS_CAL_TYPE(subtype)) {
	510	ath_mci_cal_msg(sc, subtype, (u8 *)pgpm);
	511	} else {
	512	switch (subtype) {
	513	case MCI_GPM_COEX_AGENT:
	514	ath_mci_msg(sc, opcode, (u8 *)pgpm);
	515	break;
	516	default:
	517	break;
19686ddf MSS	518	}
19686ddf MSS	519	}
682dd04b	520	recycle:
19686ddf MSS	521	MCI_GPM_RECYCLE(pgpm);
	522	}
	523	}
	524
	525	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_HW_MSG_MASK) {
19686ddf MSS	526	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL)
	527	mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_CONTROL;
	528
682dd04b	529	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_LNA_INFO)
19686ddf	530	mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_LNA_INFO;
19686ddf MSS	531
19686ddf MSS	532	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO) {
19686ddf	533	int value_dbm = ar9003_mci_state(ah,
682dd04b	534	MCI_STATE_CONT_RSSI_POWER, NULL);
19686ddf MSS	535
	536	mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_INFO;
	537
	538	if (ar9003_mci_state(ah, MCI_STATE_CONT_TXRX, NULL))
d2182b69 JP	539	ath_dbg(common, MCI,
d2182b69 JP	540	"MCI CONT_INFO: (tx) pri = %d, pwr = %d dBm\n",
19686ddf	541	ar9003_mci_state(ah,
682dd04b	542	MCI_STATE_CONT_PRIORITY, NULL),
19686ddf MSS	543	value_dbm);
19686ddf MSS	544	else
d2182b69 JP	545	ath_dbg(common, MCI,
d2182b69 JP	546	"MCI CONT_INFO: (rx) pri = %d,pwr = %d dBm\n",
19686ddf	547	ar9003_mci_state(ah,
682dd04b	548	MCI_STATE_CONT_PRIORITY, NULL),
19686ddf MSS	549	value_dbm);
	550	}
	551
682dd04b	552	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_NACK)
19686ddf	553	mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_NACK;
19686ddf	554
682dd04b	555	if (mci_int_rxmsg & AR_MCI_INTERRUPT_RX_MSG_CONT_RST)
19686ddf	556	mci_int_rxmsg &= ~AR_MCI_INTERRUPT_RX_MSG_CONT_RST;
19686ddf MSS	557	}
	558
	559	if ((mci_int & AR_MCI_INTERRUPT_RX_INVALID_HDR) \|\|
	560	(mci_int & AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT))
	561	mci_int &= ~(AR_MCI_INTERRUPT_RX_INVALID_HDR \|
	562	AR_MCI_INTERRUPT_CONT_INFO_TIMEOUT);
19686ddf	563	}
e270e776 SM	564
	565	void ath_mci_enable(struct ath_softc *sc)
	566	{
	567	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
	568
	569	if (!common->btcoex_enabled)
	570	return;
	571
	572	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
	573	sc->sc_ah->imask \|= ATH9K_INT_MCI;
	574	}