linux-imx

// SPDX-License-Identifier: GPL-2.0-only

/*

 *  Shared Transport driver

 *  HCI-LL module responsible for TI proprietary HCI_LL protocol

 *  Copyright (C) 2009-2010 Texas Instruments

 *  Author: Pavan Savoy <pavan_savoy@ti.com>

 */

​

#define pr_fmt(fmt) "(stll) :" fmt

#include <linux/skbuff.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/ti_wilink_st.h>

​

/**********************************************************************/

/* internal functions */

static void send_ll_cmd(struct st_data_s *st_data,

    unsigned char cmd)

{

​

    pr_debug("%s: writing %x", __func__, cmd);

    st_int_write(st_data, &cmd, 1);

    return;

}

​

static void ll_device_want_to_sleep(struct st_data_s *st_data)

{

    struct kim_data_s   *kim_data;

    struct ti_st_plat_data  *pdata;

​

    pr_debug("%s", __func__);

    /* sanity check */

    if (st_data->ll_state != ST_LL_AWAKE)

        pr_err("ERR hcill: ST_LL_GO_TO_SLEEP_IND"

              "in state %ld", st_data->ll_state);

​

    send_ll_cmd(st_data, LL_SLEEP_ACK);

    /* update state */

    st_data->ll_state = ST_LL_ASLEEP;

​

    /* communicate to platform about chip asleep */

    kim_data = st_data->kim_data;

    pdata = kim_data->kim_pdev->dev.platform_data;

    if (pdata->chip_asleep)

        pdata->chip_asleep(NULL);

}

​

static void ll_device_want_to_wakeup(struct st_data_s *st_data)

{

    struct kim_data_s   *kim_data;

    struct ti_st_plat_data  *pdata;

​

    /* diff actions in diff states */

    switch (st_data->ll_state) {

    case ST_LL_ASLEEP:

        send_ll_cmd(st_data, LL_WAKE_UP_ACK);   /* send wake_ack */

        break;

    case ST_LL_ASLEEP_TO_AWAKE:

        /* duplicate wake_ind */

        pr_err("duplicate wake_ind while waiting for Wake ack");

        break;

    case ST_LL_AWAKE:

        /* duplicate wake_ind */