/* SPDX-License-Identifier: GPL-2.0-or-later */
/* -*- linux-c -*- *
 *
 * ALSA driver for the digigram lx6464es interface
 *
 * Copyright (c) 2009 Tim Blechmann <tim@klingt.org>
 */

#ifndef LX6464ES_H
#define LX6464ES_H

#include <linux/spinlock.h>
#include <linux/atomic.h>

#include <sound/core.h>
#include <sound/pcm.h>

#include "lx_core.h"

#define LXP "LX6464ES: "

enum {
    ES_cmd_free         = 0,    /* no command executing */
    ES_cmd_processing   = 1,    /* execution of a read/write command */
    ES_read_pending     = 2,    /* a asynchron read command is pending */
    ES_read_finishing   = 3,    /* a read command has finished waiting (set by
                                 * Interrupt or CancelIrp) */
};

enum lx_stream_status {
        LX_STREAM_STATUS_FREE,
/*      LX_STREAM_STATUS_OPEN, */
        LX_STREAM_STATUS_SCHEDULE_RUN,
/*      LX_STREAM_STATUS_STARTED, */
        LX_STREAM_STATUS_RUNNING,
        LX_STREAM_STATUS_SCHEDULE_STOP,
/*      LX_STREAM_STATUS_STOPPED, */
/*      LX_STREAM_STATUS_PAUSED */
};


struct lx_stream {
        struct snd_pcm_substream  *stream;
        snd_pcm_uframes_t          frame_pos;
        enum lx_stream_status      status; /* free, open, running, draining
                                            * pause */
        unsigned int               is_capture:1;
};


struct lx6464es {
        struct snd_card        *card;
        struct pci_dev         *pci;
        int                     irq;

        u8                      mac_address[6];

        struct mutex            lock;        /* interrupt lock */
        struct mutex            setup_mutex; /* mutex used in hw_params, open
                                              * and close */

        /* ports */
        unsigned long           port_plx;          /* io port (size=256) */
        void __iomem           *port_plx_remapped; /* remapped plx port */
        void __iomem           *port_dsp_bar;      /* memory port (32-bit,
                                                    * non-prefetchable,
                                                    * size=8K) */

        /* messaging */
        struct mutex            msg_lock;          /* message lock */
        struct lx_rmh           rmh;
        u32                     irqsrc;

        /* configuration */
        uint                    freq_ratio : 2;
        uint                    playback_mute : 1;
        uint                    hardware_running[2];
        u32                     board_sample_rate; /* sample rate read from
                                                    * board */
        u16                     pcm_granularity;   /* board blocksize */

        /* dma */
        struct snd_dma_buffer   capture_dma_buf;
        struct snd_dma_buffer   playback_dma_buf;

        /* pcm */
        struct snd_pcm         *pcm;

        /* streams */
        struct lx_stream        capture_stream;
        struct lx_stream        playback_stream;
};


#endif /* LX6464ES_H */