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/* $NetBSD: pl041.c,v 1.8 2020/02/29 05:51:11 isaki Exp $ */
/*-
* Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* 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 AUTHOR ``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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pl041.c,v 1.8 2020/02/29 05:51:11 isaki Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kmem.h>
#include <sys/bus.h>
#include <sys/audioio.h>
#include <dev/audio/audio_if.h>
#include <dev/ic/ac97var.h>
#include <dev/ic/ac97reg.h>
#include <dev/ic/pl041var.h>
#define AACIRXCR 0x00
#define AACITXCR 0x04
#define AACITXCR_TXFEN __BIT(16)
#define AACITXCR_TXCM __BIT(15)
#define AACITXCR_TSIZE __BITS(14,13)
#define AACITXCR_TSIZE_16 __SHIFTIN(0, AACITXCR_TSIZE)
#define AACITXCR_TX(n) __BIT(n)
#define AACITXCR_TXEN __BIT(0)
#define AACISR 0x08
#define AACISR_TXFF __BIT(5)
#define AACISR_TXHE __BIT(3)
#define AACIISR 0x0c
#define AACIISR_URINTR __BIT(5)
#define AACIISR_TXINTR __BIT(2)
#define AACIIE 0x10
#define AACIIE_TXUIE __BIT(5)
#define AACIIE_TXIE __BIT(2)
#define AACISL1RX 0x50
#define AACISL1TX 0x54
#define AACISL2RX 0x58
#define AACISL2TX 0x5c
#define AACISLFR 0x68
#define AACISLISTAT 0x6c
#define AACISLIEN 0x70
#define AACIINTCLR 0x74
#define AACIMAINCR 0x78
#define AACIRESET 0x7c
#define AACISYNC 0x80
#define AACIALLINTS 0x84
#define AACIMAINFR 0x88
#define AACIDR 0x90
#define AACI_FIFO_DEPTH 512
#define AACI_READ(sc, reg) \
bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
#define AACI_WRITE(sc, reg, val) \
bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
#define AACI_WRITE_MULTI(sc, reg, val, cnt) \
bus_space_write_multi_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val), (cnt))
static const struct audio_format aaci_format = {
.mode = AUMODE_PLAY,
.encoding = AUDIO_ENCODING_SLINEAR_LE,
.validbits = 16,
.precision = 16,
.channels = 2,
.channel_mask = AUFMT_STEREO,
.frequency_type = 1,
.frequency = { 48000 }
};
static void
aaci_write_data(struct aaci_softc *sc)
{
KASSERT(mutex_owned(&sc->sc_intr_lock));
if (sc->sc_pint == NULL)
return;
while ((AACI_READ(sc, AACISR) & AACISR_TXHE) != 0) {
const int len = uimin(AACI_FIFO_DEPTH / 2, uimin(sc->sc_pblkresid,
(uintptr_t)sc->sc_pend - (uintptr_t)sc->sc_pcur));
KASSERT((len & 3) == 0);
AACI_WRITE_MULTI(sc, AACIDR, sc->sc_pcur, len >> 2);
sc->sc_pcur += (len >> 2);
if (sc->sc_pcur == sc->sc_pend)
sc->sc_pcur = sc->sc_pstart;
sc->sc_pblkresid -= len;
if (sc->sc_pblkresid == 0) {
sc->sc_pblkresid = sc->sc_pblksize;
sc->sc_pint(sc->sc_pintarg);
}
}
}
static int
aaci_query_format(void *priv, audio_format_query_t *afp)
{
return audio_query_format(&aaci_format, 1, afp);
}
static int
aaci_set_format(void *priv, int setmode,
const audio_params_t *play, const audio_params_t *rec,
audio_filter_reg_t *pfil, audio_filter_reg_t *rfil)
{
/* We have only one format so nothing to do here. */
return 0;
}
static int
aaci_getdev(void *priv, struct audio_device *audiodev)
{
snprintf(audiodev->name, sizeof(audiodev->name), "ARM");
snprintf(audiodev->version, sizeof(audiodev->version),
"PrimeCell AACI");
snprintf(audiodev->config, sizeof(audiodev->config), "aaci");
return 0;
}
static int
aaci_set_port(void *priv, mixer_ctrl_t *mc)
{
struct aaci_softc * const sc = priv;
return sc->sc_ac97_codec->vtbl->mixer_set_port(sc->sc_ac97_codec, mc);
}
static int
aaci_get_port(void *priv, mixer_ctrl_t *mc)
{
struct aaci_softc * const sc = priv;
return sc->sc_ac97_codec->vtbl->mixer_get_port(sc->sc_ac97_codec, mc);
}
static int
aaci_query_devinfo(void *priv, mixer_devinfo_t *di)
{
struct aaci_softc * const sc = priv;
return sc->sc_ac97_codec->vtbl->query_devinfo(sc->sc_ac97_codec, di);
}
static int
aaci_get_props(void *priv)
{
return AUDIO_PROP_PLAYBACK;
}
static int
aaci_trigger_output(void *priv, void *start, void *end, int blksize,
void (*intr)(void *), void *intrarg, const audio_params_t *params)
{
struct aaci_softc * const sc = priv;
sc->sc_pcur = start;
sc->sc_pstart = start;
sc->sc_pend = end;
sc->sc_pblksize = blksize;
sc->sc_pblkresid = blksize;
sc->sc_pint = intr;
sc->sc_pintarg = intrarg;
AACI_WRITE(sc, AACIIE, AACIIE_TXIE | AACIIE_TXUIE);
AACI_WRITE(sc, AACITXCR, AACITXCR_TXFEN | AACITXCR_TXEN |
AACITXCR_TXCM | AACITXCR_TSIZE_16 |
AACITXCR_TX(AC97_SLOT_PCM_L) | AACITXCR_TX(AC97_SLOT_PCM_R));
return 0;
}
static int
aaci_halt_output(void *priv)
{
struct aaci_softc * const sc = priv;
sc->sc_pint = NULL;
AACI_WRITE(sc, AACITXCR, 0);
AACI_WRITE(sc, AACIIE, 0);
return 0;
}
static void
aaci_get_locks(void *priv, kmutex_t **intr, kmutex_t **thread)
{
struct aaci_softc * const sc = priv;
*intr = &sc->sc_intr_lock;
*thread = &sc->sc_lock;
}
static const struct audio_hw_if aaci_hw_if = {
.query_format = aaci_query_format,
.set_format = aaci_set_format,
.getdev = aaci_getdev,
.set_port = aaci_set_port,
.get_port = aaci_get_port,
.query_devinfo = aaci_query_devinfo,
.get_props = aaci_get_props,
.trigger_output = aaci_trigger_output,
.halt_output = aaci_halt_output,
.get_locks = aaci_get_locks,
};
static int
aaci_ac97_attach(void *priv, struct ac97_codec_if *codec)
{
struct aaci_softc * const sc = priv;
sc->sc_ac97_codec = codec;
return 0;
}
static int
aaci_ac97_read(void *priv, uint8_t reg, uint16_t *val)
{
struct aaci_softc * const sc = priv;
AACI_WRITE(sc, AACISL1TX, (reg << 12) | (1 << 19));
if (AACI_READ(sc, AACISL1RX) != (reg << 12))
return 1;
*val = AACI_READ(sc, AACISL2RX) >> 4;
return 0;
}
static int
aaci_ac97_write(void *priv, uint8_t reg, uint16_t val)
{
struct aaci_softc * const sc = priv;
AACI_WRITE(sc, AACISL2TX, val << 4);
AACI_WRITE(sc, AACISL1TX, (reg << 12) | (0 << 19));
return 0;
}
void
aaci_attach(struct aaci_softc *sc)
{
int error;
aprint_naive("\n");
aprint_normal(": Advanced Audio CODEC\n");
mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE);
mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_AUDIO);
sc->sc_ac97_host.arg = sc;
sc->sc_ac97_host.attach = aaci_ac97_attach;
sc->sc_ac97_host.read = aaci_ac97_read;
sc->sc_ac97_host.write = aaci_ac97_write;
error = ac97_attach(&sc->sc_ac97_host, sc->sc_dev, &sc->sc_lock);
if (error) {
aprint_error_dev(sc->sc_dev, "couldn't attach codec (%d)\n",
error);
return;
}
sc->sc_audiodev = audio_attach_mi(&aaci_hw_if, sc, sc->sc_dev);
}
int
aaci_intr(void *priv)
{
struct aaci_softc * const sc = priv;
uint32_t isr;
if (sc->sc_audiodev == NULL)
return 0;
isr = AACI_READ(sc, AACIISR);
if (isr & AACIISR_URINTR)
AACI_WRITE(sc, AACIINTCLR, AACIISR_URINTR);
if (isr & AACIISR_TXINTR) {
mutex_enter(&sc->sc_intr_lock);
if (sc->sc_pint == NULL)
AACI_WRITE(sc, AACIIE, 0);
aaci_write_data(sc);
mutex_exit(&sc->sc_intr_lock);
}
return 1;
}
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