pinebuds/platform/hal/hal_btpcm.c

/***************************************************************************
 *
 * Copyright 2015-2019 BES.
 * All rights reserved. All unpublished rights reserved.
 *
 * No part of this work may be used or reproduced in any form or by any
 * means, or stored in a database or retrieval system, without prior written
 * permission of BES.
 *
 * Use of this work is governed by a license granted by BES.
 * This work contains confidential and proprietary information of
 * BES. which is protected by copyright, trade secret,
 * trademark and other intellectual property rights.
 *
 ****************************************************************************/
#include "plat_addr_map.h"

#ifdef BTPCM_BASE

#include "plat_types.h"
#include "reg_btpcmip.h"
#include "hal_btpcmip.h"
#include "hal_btpcm.h"
#include "hal_uart.h"
#include "hal_trace.h"
#include "hal_timer.h"
#include "hal_cmu.h"

//#define BTPCM_CLOCK_SOURCE 240000000
#define BTPCM_CLOCK_SOURCE 22579200
//#define BTPCM_CLOCK_SOURCE 48000000
//#define BTPCM_CLOCK_SOURCE 3072000

//#define BTPCM_CLOCK_SOURCE 76800000
//#define BTPCM_CLOCK_SOURCE 84672000

//#define HAL_BTPCM_TX_FIFO_TRIGGER_LEVEL   (BTPCMIP_FIFO_DEPTH/2)
//#define HAL_BTPCM_RX_FIFO_TRIGGER_LEVEL   (BTPCMIP_FIFO_DEPTH/2)

#define HAL_BTPCM_TX_FIFO_TRIGGER_LEVEL   (1)
#define HAL_BTPCM_RX_FIFO_TRIGGER_LEVEL   (0)

#define HAL_BTPCM_YES 1
#define HAL_BTPCM_NO 0

static const char * const invalid_id = "Invalid BTPCM ID: %d\n";
//static const char * const invalid_ch = "Invalid BTPCM CH: %d\n";

static bool btpcm_opened[HAL_BTPCM_ID_NUM][AUD_STREAM_NUM];

static inline POSSIBLY_UNUSED unsigned char reverse(unsigned char in)
{
    uint8_t out = 0;
    uint32_t i = 0;
    for (i = 0; i < 8; ++i) {
        if((1<<i & in))
            out = out | (1<<(7-i));
        else
            out = out & (~(1<<(7-i)));
    }

    return out;
}

static inline uint32_t _btpcm_get_reg_base(enum HAL_BTPCM_ID_T id)
{
    ASSERT(id < HAL_BTPCM_ID_NUM, invalid_id, id);

    switch(id) {
        case HAL_BTPCM_ID_0:
        default:
            return BTPCM_BASE;
            break;
    }
	return 0;
}

int hal_btpcm_open(enum HAL_BTPCM_ID_T id, enum AUD_STREAM_T stream)
{
    uint32_t reg_base;

    reg_base = _btpcm_get_reg_base(id);

    if (!btpcm_opened[id][AUD_STREAM_PLAYBACK] && !btpcm_opened[id][AUD_STREAM_CAPTURE]) {
        // Init to slave mode before enabling module clock
        // Make sure the clock mux is switched when there is no clock active
        hal_cmu_pcm_set_slave_mode(true);
        hal_cmu_pcm_clock_enable();

        hal_cmu_clock_enable(HAL_CMU_MOD_O_PCM);
        hal_cmu_clock_enable(HAL_CMU_MOD_P_PCM);
        hal_cmu_reset_clear(HAL_CMU_MOD_O_PCM);
        hal_cmu_reset_clear(HAL_CMU_MOD_P_PCM);

        // After release pclk reset, need delay 2 tick to access any pcm reg.
        hal_sys_timer_delay(2);
        btpcmip_pcm_clk_open_en(reg_base,0);

        btpcmip_w_enable_rx_dma(reg_base, HAL_BTPCM_NO);
        btpcmip_w_enable_tx_dma(reg_base, HAL_BTPCM_NO);

        btpcmip_flush_tx_fifo(reg_base);
        btpcmip_flush_rx_fifo(reg_base);

        btpcmip_w_slot_sel(reg_base, 0);
        btpcmip_w_shortsync(reg_base, HAL_BTPCM_YES);
        btpcmip_w_signin(reg_base, HAL_BTPCM_YES);
        btpcmip_w_mask1mask2(reg_base, 0);
        btpcmip_w_enable_btpcmip(reg_base, HAL_BTPCM_YES);

        // Generate 10 clock cycles for BTPCM module to initialize its states
        for (int i = 0; i < 10; i++) {
            hal_cmu_pcm_set_slave_mode(false);
            hal_cmu_pcm_set_slave_mode(true);
        }

        //btpcmip_w_length(reg_base, 0x05);         //16 bit
    }

    btpcm_opened[id][stream] = true;


    return 0;
}

int hal_btpcm_close(enum HAL_BTPCM_ID_T id, enum AUD_STREAM_T stream)
{
    uint32_t reg_base;

    reg_base = _btpcm_get_reg_base(id);

    btpcm_opened[id][stream] = false;

    if (!btpcm_opened[id][AUD_STREAM_PLAYBACK] && !btpcm_opened[id][AUD_STREAM_CAPTURE]) {
        btpcmip_w_enable_btpcmip(reg_base, HAL_BTPCM_NO);

        //don't need flush rx and tx fifo

        hal_cmu_reset_set(HAL_CMU_MOD_P_PCM);
        hal_cmu_reset_set(HAL_CMU_MOD_O_PCM);
        hal_cmu_clock_disable(HAL_CMU_MOD_P_PCM);
        hal_cmu_clock_disable(HAL_CMU_MOD_O_PCM);
        hal_cmu_pcm_clock_disable();
    }

    return 0;
}

int hal_btpcm_start_stream(enum HAL_BTPCM_ID_T id, enum AUD_STREAM_T stream)
{
    return 0;
}

int hal_btpcm_stop_stream(enum HAL_BTPCM_ID_T id, enum AUD_STREAM_T stream)
{
    return 0;
}

int hal_btpcm_setup_stream(enum HAL_BTPCM_ID_T id, enum AUD_STREAM_T stream, struct HAL_BTPCM_CONFIG_T *cfg)
{
    uint32_t reg_base;

    reg_base = _btpcm_get_reg_base(id);

    if (!btpcm_opened[id][stream]) {
        return 1;
    }

    if (stream == AUD_STREAM_PLAYBACK)
    {
        //dma config
        btpcmip_w_tx_fifo_threshold(reg_base, HAL_BTPCM_TX_FIFO_TRIGGER_LEVEL);
        btpcmip_w_enable_tx_dma(reg_base, HAL_BTPCM_YES);
    }
    else
    {
        //dma config
        btpcmip_w_rx_fifo_threshold(reg_base, HAL_BTPCM_RX_FIFO_TRIGGER_LEVEL);
        btpcmip_w_enable_rx_dma(reg_base, HAL_BTPCM_YES);
    }

    //hal_sys_timer_delay(2);

    btpcmip_pcm_clk_open_en(reg_base,1);

    return 0;
}

int hal_btpcm_send(enum HAL_BTPCM_ID_T id, uint8_t *value, uint32_t value_len)
{
    uint32_t i = 0;
    uint32_t reg_base;

    reg_base = _btpcm_get_reg_base(id);

    for (i = 0; i < value_len; i += 4) {
        while (!(btpcmip_r_int_status(reg_base) & BTPCMIP_INT_STATUS_TX_FIFO_EMPTY_MASK));

        btpcmip_w_tx_fifo(reg_base, value[i+1]<<8 | value[i]);
    }

    return 0;
}
uint8_t hal_btpcm_recv(enum HAL_BTPCM_ID_T id, uint8_t *value, uint32_t value_len)
{
    ASSERT(id < HAL_BTPCM_ID_NUM, invalid_id, id);
    return 0;
}

#endif