linux-imx

/*

 *  Bluetooth Software UART Qualcomm protocol

 *

 *  HCI_IBS (HCI In-Band Sleep) is Qualcomm's power management

 *  protocol extension to H4.

 *

 *  Copyright (C) 2007 Texas Instruments, Inc.

 *  Copyright (c) 2010, 2012, 2018 The Linux Foundation. All rights reserved.

 *

 *  Acknowledgements:

 *  This file is based on hci_ll.c, which was...

 *  Written by Ohad Ben-Cohen <ohad@bencohen.org>

 *  which was in turn based on hci_h4.c, which was written

 *  by Maxim Krasnyansky and Marcel Holtmann.

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License version 2

 *  as published by the Free Software Foundation

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */

​

#include <linux/kernel.h>

#include <linux/clk.h>

#include <linux/debugfs.h>

#include <linux/delay.h>

#include <linux/device.h>

#include <linux/gpio/consumer.h>

#include <linux/mod_devicetable.h>

#include <linux/module.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/regulator/consumer.h>

#include <linux/serdev.h>

#include <asm/unaligned.h>

​

#include <net/bluetooth/bluetooth.h>

#include <net/bluetooth/hci_core.h>

​

#include "hci_uart.h"

#include "btqca.h"

​

/* HCI_IBS protocol messages */

#define HCI_IBS_SLEEP_IND   0xFE

#define HCI_IBS_WAKE_IND    0xFD

#define HCI_IBS_WAKE_ACK    0xFC

#define HCI_MAX_IBS_SIZE    10

​

/* Controller states */

#define STATE_IN_BAND_SLEEP_ENABLED 1

​

#define IBS_WAKE_RETRANS_TIMEOUT_MS 100

#define IBS_TX_IDLE_TIMEOUT_MS      2000

#define CMD_TRANS_TIMEOUT_MS        100

​

/* susclk rate */

#define SUSCLK_RATE_32KHZ   32768

​

/* Controller debug log header */

#define QCA_DEBUG_HANDLE    0x2EDC

​

/* HCI_IBS transmit side sleep protocol states */

enum tx_ibs_states {

    HCI_IBS_TX_ASLEEP,

    HCI_IBS_TX_WAKING,

    HCI_IBS_TX_AWAKE,

};

​

/* HCI_IBS receive side sleep protocol states */

enum rx_states {

    HCI_IBS_RX_ASLEEP,

    HCI_IBS_RX_AWAKE,

};

​

/* HCI_IBS transmit and receive side clock state vote */

enum hci_ibs_clock_state_vote {

    HCI_IBS_VOTE_STATS_UPDATE,

    HCI_IBS_TX_VOTE_CLOCK_ON,

    HCI_IBS_TX_VOTE_CLOCK_OFF,

    HCI_IBS_RX_VOTE_CLOCK_ON,

    HCI_IBS_RX_VOTE_CLOCK_OFF,

};

​

struct qca_data {