/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * TI DaVinci Audio Serial Port support
 *
 * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/
 */

#ifndef __DAVINCI_ASP_H
#define __DAVINCI_ASP_H

#include <linux/genalloc.h>

struct davinci_mcasp_pdata {
        u32 tx_dma_offset;
        u32 rx_dma_offset;
        int asp_chan_q; /* event queue number for ASP channel */
        int ram_chan_q; /* event queue number for RAM channel */
        /*
         * Allowing this is more efficient and eliminates left and right swaps
         * caused by underruns, but will swap the left and right channels
         * when compared to previous behavior.
         */
        unsigned enable_channel_combine:1;
        unsigned sram_size_playback;
        unsigned sram_size_capture;
        struct gen_pool *sram_pool;

        /*
         * This flag works when both clock and FS are outputs for the cpu
         * and makes clock more accurate (FS is not symmetrical and the
         * clock is very fast.
         * The clock becoming faster is named
         * i2s continuous serial clock (I2S_SCK) and it is an externally
         * visible bit clock.
         *
         * first line : WordSelect
         * second line : ContinuousSerialClock
         * third line: SerialData
         *
         * SYMMETRICAL APPROACH:
         *   _______________________          LEFT
         * _|         RIGHT         |______________________|
         *     _   _         _   _   _   _         _   _
         *   _| |_| |_ x16 _| |_| |_| |_| |_ x16 _| |_| |_
         *     _   _         _   _   _   _         _   _
         *   _/ \_/ \_ ... _/ \_/ \_/ \_/ \_ ... _/ \_/ \_
         *    \_/ \_/       \_/ \_/ \_/ \_/       \_/ \_/
         *
         * ACCURATE CLOCK APPROACH:
         *   ______________          LEFT
         * _|     RIGHT    |_______________________________|
         *     _         _   _         _   _   _   _   _   _
         *   _| |_ x16 _| |_| |_ x16 _| |_| |_| |_| |_| |_| |
         *     _         _   _          _      dummy cycles
         *   _/ \_ ... _/ \_/ \_  ... _/ \__________________
         *    \_/       \_/ \_/        \_/
         *
         */
        bool i2s_accurate_sck;

        /* McASP specific fields */
        int tdm_slots_tx;
        int tdm_slots_rx;
        u8 op_mode;
        u8 dismod;
        u8 num_serializer;
        u8 *serial_dir;
        u8 version;
        u8 txnumevt;
        u8 rxnumevt;
        int tx_dma_channel;
        int rx_dma_channel;
};
/* TODO: Fix arch/arm/mach-davinci/ users and remove this define */
#define snd_platform_data davinci_mcasp_pdata

enum {
        MCASP_VERSION_1 = 0,    /* DM646x */
        MCASP_VERSION_2,        /* DA8xx/OMAPL1x */
        MCASP_VERSION_3,        /* TI81xx/AM33xx */
        MCASP_VERSION_4,        /* DRA7xxx */
        MCASP_VERSION_OMAP,     /* OMAP4/5 */
};

#define INACTIVE_MODE   0
#define TX_MODE         1
#define RX_MODE         2

#define DAVINCI_MCASP_IIS_MODE  0
#define DAVINCI_MCASP_DIT_MODE  1

#endif