linux-vybrid_public/drivers/net/wireless/iwlwifi/mvm/bt-coex.c

/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
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 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2013 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
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 * General Public License for more details.
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 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
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 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2013 Intel Corporation. All rights reserved.
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 *****************************************************************************/

#include "fw-api-bt-coex.h"
#include "iwl-modparams.h"
#include "mvm.h"

#define EVENT_PRIO_ANT(_evt, _prio, _shrd_ant)			\
	[(_evt)] = (((_prio) << BT_COEX_PRIO_TBL_PRIO_POS) |	\
		   ((_shrd_ant) << BT_COEX_PRIO_TBL_SHRD_ANT_POS))

static const u8 iwl_bt_prio_tbl[BT_COEX_PRIO_TBL_EVT_MAX] = {
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_INIT_CALIB1,
		       BT_COEX_PRIO_TBL_PRIO_BYPASS, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_INIT_CALIB2,
		       BT_COEX_PRIO_TBL_PRIO_BYPASS, 1),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_LOW1,
		       BT_COEX_PRIO_TBL_PRIO_LOW, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_LOW2,
		       BT_COEX_PRIO_TBL_PRIO_LOW, 1),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_HIGH1,
		       BT_COEX_PRIO_TBL_PRIO_HIGH, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_PERIODIC_CALIB_HIGH2,
		       BT_COEX_PRIO_TBL_PRIO_HIGH, 1),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_DTIM,
		       BT_COEX_PRIO_TBL_DISABLED, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_SCAN52,
		       BT_COEX_PRIO_TBL_PRIO_COEX_OFF, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_SCAN24,
		       BT_COEX_PRIO_TBL_PRIO_COEX_ON, 0),
	EVENT_PRIO_ANT(BT_COEX_PRIO_TBL_EVT_IDLE,
		       BT_COEX_PRIO_TBL_PRIO_COEX_IDLE, 0),
	0, 0, 0, 0, 0, 0,
};

#undef EVENT_PRIO_ANT

int iwl_send_bt_prio_tbl(struct iwl_mvm *mvm)
{
	return iwl_mvm_send_cmd_pdu(mvm, BT_COEX_PRIO_TABLE, CMD_SYNC,
				    sizeof(struct iwl_bt_coex_prio_tbl_cmd),
				    &iwl_bt_prio_tbl);
}

static int iwl_send_bt_env(struct iwl_mvm *mvm, u8 action, u8 type)
{
	struct iwl_bt_coex_prot_env_cmd env_cmd;
	int ret;

	env_cmd.action = action;
	env_cmd.type = type;
	ret = iwl_mvm_send_cmd_pdu(mvm, BT_COEX_PROT_ENV, CMD_SYNC,
				   sizeof(env_cmd), &env_cmd);
	if (ret)
		IWL_ERR(mvm, "failed to send BT env command\n");
	return ret;
}

enum iwl_bt_kill_msk {
	BT_KILL_MSK_DEFAULT,
	BT_KILL_MSK_SCO_HID_A2DP,
	BT_KILL_MSK_REDUCED_TXPOW,
	BT_KILL_MSK_MAX,
};

static const u32 iwl_bt_ack_kill_msk[BT_KILL_MSK_MAX] = {
	0xffffffff,
	0xfffffc00,
	0,
};

static const u32 iwl_bt_cts_kill_msk[BT_KILL_MSK_MAX] = {
	0xffffffff,
	0xfffffc00,
	0,
};

#define IWL_BT_DEFAULT_BOOST (0xf0f0f0f0)

/* Tight Coex */
static const __le32 iwl_tight_lookup[BT_COEX_LUT_SIZE] = {
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaeaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xcc00ff28),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0xcc00aaaa),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0xc0004000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0xf0005000),
	cpu_to_le32(0xf0005000),
};

/* Loose Coex */
static const __le32 iwl_loose_lookup[BT_COEX_LUT_SIZE] = {
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaeaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xcc00ff28),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0xcc00aaaa),
	cpu_to_le32(0x0000aaaa),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0xf0005000),
	cpu_to_le32(0xf0005000),
};

/* Full concurrency */
static const __le32 iwl_concurrent_lookup[BT_COEX_LUT_SIZE] = {
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0xaaaaaaaa),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
	cpu_to_le32(0x00000000),
};

/* BT Antenna Coupling Threshold (dB) */
#define IWL_BT_ANTENNA_COUPLING_THRESHOLD	(35)

int iwl_send_bt_init_conf(struct iwl_mvm *mvm)
{
	struct iwl_bt_coex_cmd cmd = {
		.max_kill = 5,
		.bt3_time_t7_value = 1,
		.bt3_prio_sample_time = 2,
		.bt3_timer_t2_value = 0xc,
	};
	int ret;

	cmd.flags = iwlwifi_mod_params.bt_coex_active ?
			BT_COEX_NW : BT_COEX_DISABLE;
	cmd.flags |= iwlwifi_mod_params.bt_ch_announce ?
			BT_CH_PRIMARY_EN | BT_CH_SECONDARY_EN : 0;
	cmd.flags |= BT_SYNC_2_BT_DISABLE;

	cmd.valid_bit_msk = cpu_to_le16(BT_VALID_ENABLE |
					BT_VALID_BT_PRIO_BOOST |
					BT_VALID_MAX_KILL |
					BT_VALID_3W_TMRS |
					BT_VALID_KILL_ACK |
					BT_VALID_KILL_CTS |
					BT_VALID_REDUCED_TX_POWER |
					BT_VALID_LUT);

	if (iwlwifi_mod_params.ant_coupling > IWL_BT_ANTENNA_COUPLING_THRESHOLD)
		memcpy(&cmd.decision_lut, iwl_loose_lookup,
		       sizeof(iwl_tight_lookup));
	else
		memcpy(&cmd.decision_lut, iwl_tight_lookup,
		       sizeof(iwl_tight_lookup));

	cmd.bt_prio_boost = cpu_to_le32(IWL_BT_DEFAULT_BOOST);
	cmd.kill_ack_msk =
		cpu_to_le32(iwl_bt_ack_kill_msk[BT_KILL_MSK_DEFAULT]);
	cmd.kill_cts_msk =
		cpu_to_le32(iwl_bt_cts_kill_msk[BT_KILL_MSK_DEFAULT]);

	/* go to CALIB state in internal BT-Coex state machine */
	ret = iwl_send_bt_env(mvm, BT_COEX_ENV_OPEN,
			      BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
	if (ret)
		return ret;

	ret  = iwl_send_bt_env(mvm, BT_COEX_ENV_CLOSE,
			       BT_COEX_PRIO_TBL_EVT_INIT_CALIB2);
	if (ret)
		return ret;

	return iwl_mvm_send_cmd_pdu(mvm, BT_CONFIG, CMD_SYNC,
				    sizeof(cmd), &cmd);
}