/*      $NetBSD: tms320av110.c,v 1.27 2019/06/08 08:02:38 isaki Exp $   */

/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Ignatios Souvatzis.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/*
* Machine independent part of TMS320AV110 driver.
*
* Currently, only minimum support for audio output. For audio/video
* synchronization, more is needed.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tms320av110.c,v 1.27 2019/06/08 08:02:38 isaki Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/proc.h>

#include <sys/audioio.h>
#include <dev/audio/audio_if.h>

#include <dev/ic/tms320av110reg.h>
#include <dev/ic/tms320av110var.h>

#include <sys/bus.h>

void tav_close(void *);
int tav_query_format(void *, audio_format_query_t *);
int tav_set_format(void *, int,
   const audio_params_t *, const audio_params_t *,
   audio_filter_reg_t *, audio_filter_reg_t *);
int tav_round_blocksize(void *, int, int, const audio_params_t *);
int tav_start_output(void *, void *, int, void (*)(void *), void *);
int tav_start_input(void *, void *, int, void (*)(void *), void *);
int tav_halt_output(void *);
int tav_halt_input(void *);
int tav_speaker_ctl(void *, int);
int tav_getdev(void *, struct audio_device *);
int tav_set_port(void *, mixer_ctrl_t *);
int tav_get_port(void *, mixer_ctrl_t *);
int tav_query_devinfo(void *, mixer_devinfo_t *);
int tav_get_props(void *);
void tav_get_locks(void *, kmutex_t **, kmutex_t **);

const struct audio_hw_if tav_audio_if = {
       .close                  = tav_close,
       .query_format           = tav_query_format,
       .set_format             = tav_set_format,
       .round_blocksize        = tav_round_blocksize,
       .start_output           = tav_start_output,
       .start_input            = tav_start_input,
       .halt_output            = tav_halt_output,
       .halt_input             = tav_halt_input,
       .speaker_ctl            = tav_speaker_ctl,      /* optional */
       .getdev                 = tav_getdev,
       .set_port               = tav_set_port,
       .get_port               = tav_get_port,
       .query_devinfo          = tav_query_devinfo,
       .get_props              = tav_get_props,
       .get_locks              = tav_get_locks,
};

/*
* XXX: The frequency might depend on the specific board.
* should be handled by the backend.
*/
#define TAV_FORMAT(prio, enc, prec) \
       { \
               .priority       = (prio), \
               .mode           = AUMODE_PLAY, \
               .encoding       = (enc), \
               .validbits      = (prec), \
               .precision      = (prec), \
               .channels       = 2, \
               .channel_mask   = AUFMT_STEREO, \
               .frequency_type = 1, \
               .frequency      = { 44100 }, \
       }
const struct audio_format tav_formats[] = {
       TAV_FORMAT(-1, AUDIO_ENCODING_MPEG_L2_STREAM, 1),
       TAV_FORMAT(-1, AUDIO_ENCODING_MPEG_L2_PACKETS, 1),
       TAV_FORMAT(-1, AUDIO_ENCODING_MPEG_L2_SYSTEM, 1),
       TAV_FORMAT( 0, AUDIO_ENCODING_SLINEAR_BE, 16),
};
#define TAV_NFORMATS __arraycount(tav_formats)

void
tms320av110_attach_mi(struct tav_softc *sc)
{
       bus_space_tag_t iot;
       bus_space_handle_t ioh;

       iot = sc->sc_iot;
       ioh = sc->sc_ioh;
       tav_write_byte(iot, ioh, TAV_RESET, 1);
       while (tav_read_byte(iot, ioh, TAV_RESET))
               delay(250);

       tav_write_byte(iot, ioh, TAV_PCM_ORD, sc->sc_pcm_ord);
       tav_write_byte(iot, ioh, TAV_PCM_18, sc->sc_pcm_18);
       tav_write_byte(iot, ioh, TAV_DIF, sc->sc_dif);
       tav_write_byte(iot, ioh, TAV_PCM_DIV, sc->sc_pcm_div);

       printf(": chip rev. %d, %d bytes buffer\n",
           tav_read_byte(iot, ioh, TAV_VERSION),
           TAV_DRAM_SIZE(tav_read_byte(iot, ioh, TAV_DRAM_EXT)));

       tav_write_byte(iot, ioh, TAV_AUD_ID_EN, 0);
       tav_write_byte(iot, ioh, TAV_SKIP, 0);
       tav_write_byte(iot, ioh, TAV_REPEAT, 0);
       tav_write_byte(iot, ioh, TAV_MUTE, 0);
       tav_write_byte(iot, ioh, TAV_PLAY, 1);
       tav_write_byte(iot, ioh, TAV_SYNC_ECM, 0);
       tav_write_byte(iot, ioh, TAV_CRC_ECM, 0);
       tav_write_byte(iot, ioh, TAV_ATTEN_L, 0);
       tav_write_byte(iot, ioh, TAV_ATTEN_R, 0);
       tav_write_short(iot, ioh, TAV_FREE_FORM, 0);
       tav_write_byte(iot, ioh, TAV_SIN_EN, 0);
       tav_write_byte(iot, ioh, TAV_SYNC_ECM, TAV_ECM_REPEAT);
       tav_write_byte(iot, ioh, TAV_CRC_ECM, TAV_ECM_REPEAT);

       sc->sc_active = 0;

       audio_attach_mi(&tav_audio_if, sc, sc->sc_dev);
}

int
tms320av110_intr(void *p)
{
       struct tav_softc *sc;
       uint16_t intlist;

       sc = p;

       mutex_spin_enter(&sc->sc_intr_lock);

       intlist = tav_read_short(sc->sc_iot, sc->sc_ioh, TAV_INTR)
           /* & tav_read_short(sc->sc_iot, sc->sc_ioh, TAV_INTR_EN)*/;

       if (!intlist) {
               mutex_spin_exit(&sc->sc_intr_lock);
               return 0;
       }

       /* ack now, so that we don't miss later interrupts */
       if (sc->sc_intack)
               (sc->sc_intack)(sc);

       if (intlist & TAV_INTR_LOWWATER) {
               (*sc->sc_intr)(sc->sc_intrarg);
       }

       mutex_spin_exit(&sc->sc_intr_lock);

       return 1;
}

void
tav_close(void *hdl)
{
       struct tav_softc *sc;
       bus_space_tag_t iot;
       bus_space_handle_t ioh;

       sc = hdl;
       iot = sc->sc_iot;
       ioh = sc->sc_ioh;

       /* re"start" chip, also clears interrupts and interrupt enable */
       tav_write_short(iot, ioh, TAV_INTR_EN, 0);
       if (sc->sc_intack)
               (*sc->sc_intack)(sc);
}

int
tav_query_format(void *hdl, audio_format_query_t *afp)
{

       return audio_query_format(tav_formats, TAV_NFORMATS, afp);
}

int
tav_start_input(void *hdl, void *block, int bsize,
   void (*intr)(void *), void *intrarg)
{

       return ENOTTY;
}

int
tav_halt_input(void *hdl)
{

       return ENOTTY;
}

int
tav_start_output(void *hdl, void *block, int bsize,
   void (*intr)(void *), void *intrarg)
{
       struct tav_softc *sc;
       bus_space_tag_t iot;
       bus_space_handle_t ioh;
       uint8_t *ptr;
       int count;

       sc = hdl;
       iot = sc->sc_iot;
       ioh = sc->sc_ioh;
       ptr = block;
       count = bsize;

       sc->sc_intr = intr;
       sc->sc_intrarg = intrarg;

       if (sc->sc_active == 0) {
               tav_write_byte(iot, ioh, TAV_PLAY, 1);
               tav_write_byte(iot, ioh, TAV_MUTE, 0);
               sc->sc_active = 1;
       }

       bus_space_write_multi_1(iot, ioh, TAV_DATAIN, ptr, count);
       tav_write_short(iot, ioh, TAV_INTR_EN, TAV_INTR_LOWWATER);

       return 0;
}

int
tav_halt_output(void *hdl)
{
       struct tav_softc *sc;
       bus_space_tag_t iot;
       bus_space_handle_t ioh;

       sc = hdl;
       iot = sc->sc_iot;
       ioh = sc->sc_ioh;

       tav_write_byte(iot, ioh, TAV_PLAY, 0);
       sc->sc_active = 0;

       return 0;
}

int
tav_getdev(void *hdl, struct audio_device *ret)
{
       struct tav_softc *sc;
       bus_space_tag_t iot;
       bus_space_handle_t ioh;

       sc = hdl;
       iot = sc->sc_iot;
       ioh = sc->sc_ioh;

       strlcpy(ret->name, "tms320av110", sizeof(ret->name));
       /* guaranteed to be <= 4 in length */
       snprintf(ret->version, sizeof(ret->version), "%u",
           tav_read_byte(iot, ioh, TAV_VERSION));
       strlcpy(ret->config, device_xname(sc->sc_dev), sizeof(ret->config));

       return 0;
}

int
tav_round_blocksize(void *hdl, int size, int mode, const audio_params_t *param)
{
       struct tav_softc *sc;
       bus_space_tag_t iot;
       bus_space_handle_t ioh;
       int maxhalf;

       sc = hdl;
       iot = sc->sc_iot;
       ioh = sc->sc_ioh;

       maxhalf = TAV_DRAM_HSIZE(tav_read_byte(iot, ioh, TAV_DRAM_EXT));
       if (size > maxhalf)
               size = maxhalf;

       /* XXX should round to 128 bytes limits for audio bypass */
       size &= ~3;

       tav_write_short(iot, ioh, TAV_BALE_LIM, size/8);

       /* the buffer limits are in units of 4 bytes */
       return (size);
}

int
tav_get_props(void *hdl)
{

       return AUDIO_PROP_PLAYBACK | AUDIO_PROP_CAPTURE;
}

void
tav_get_locks(void *hdl, kmutex_t **intr, kmutex_t **thread)
{
       struct tav_softc *sc;

       sc = hdl;
       *intr = &sc->sc_intr_lock;
       *thread = &sc->sc_lock;
}

int
tav_set_format(void *hdl, int setmode,
   const audio_params_t *p, const audio_params_t *r,
   audio_filter_reg_t *pfil, audio_filter_reg_t *rfil)
{
       struct tav_softc *sc;
       bus_space_tag_t iot;
       bus_space_handle_t ioh;

       sc = hdl;
       iot = sc->sc_iot;
       ioh = sc->sc_ioh;

       KASSERT((setmode & AUMODE_PLAY));
       KASSERT(p->encoding == AUDIO_ENCODING_SLINEAR_BE);

       bus_space_write_1(iot, ioh, TAV_STR_SEL, TAV_STR_SEL_AUDIO_BYPASS);

       tav_write_byte(iot, ioh, TAV_RESTART, 1);
       do {
               delay(10);
       } while (tav_read_byte(iot, ioh, TAV_RESTART));

       return 0;
}

int
tav_set_port(void *hdl, mixer_ctrl_t *mc)
{

       /* dummy */
       return 0;
}

int
tav_get_port(void *hdl, mixer_ctrl_t *mc)
{

       /* dummy */
       return 0;
}

int
tav_query_devinfo(void *hdl, mixer_devinfo_t *di)
{
       return ENXIO;
}

int
tav_speaker_ctl(void *hdl, int value)
{
       struct tav_softc *sc;
       bus_space_tag_t iot;
       bus_space_handle_t ioh;

       sc = hdl;
       iot = sc->sc_iot;
       ioh = sc->sc_ioh;

       tav_write_byte(iot, ioh, TAV_MUTE, !value);

       return 0;
}

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