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Add VideoCore audio driver for Rasperry Pi (BCM2835)

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Oleksandr Tymoshenko 2015-02-08 01:12:40 +00:00
parent 4676e354fd
commit 2f99b597e0
4 changed files with 1068 additions and 0 deletions
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908
sys/arm/broadcom/bcm2835/bcm2835_audio.c Normal file
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/*-
* Copyright (c) 2015 Oleksandr Tymoshenko <gonzo@freebsd.org>
*
* 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 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 AUTHOR 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.
*/
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_snd.h"
#endif
#include <dev/sound/pcm/sound.h>
#include <dev/sound/chip.h>
#include "mixer_if.h"
#include "interface/compat/vchi_bsd.h"
#include "interface/vchi/vchi.h"
#include "interface/vchiq_arm/vchiq.h"
#include "vc_vchi_audioserv_defs.h"
SND_DECLARE_FILE("$FreeBSD$");
#define DEST_AUTO 0
#define DEST_HEADPHONES 1
#define DEST_HDMI 2
#define VCHIQ_AUDIO_PACKET_SIZE 4000
#define VCHIQ_AUDIO_BUFFER_SIZE 128000
#define VCHIQ_AUDIO_MAX_VOLUME
/* volume in terms of 0.01dB */
#define VCHIQ_AUDIO_VOLUME_MIN -10239
#define VCHIQ_AUDIO_VOLUME(db100) (uint32_t)(-((db100) << 8)/100)
/* dB levels with 5% volume step */
static int db_levels[] = {
VCHIQ_AUDIO_VOLUME_MIN, -4605, -3794, -3218, -2772,
-2407, -2099, -1832, -1597, -1386,
-1195, -1021, -861, -713, -575,
-446, -325, -210, -102, 0,
};
static uint32_t bcm2835_audio_playfmt[] = {
SND_FORMAT(AFMT_U8, 1, 0),
SND_FORMAT(AFMT_U8, 2, 0),
SND_FORMAT(AFMT_S8, 1, 0),
SND_FORMAT(AFMT_S8, 2, 0),
SND_FORMAT(AFMT_S16_LE, 1, 0),
SND_FORMAT(AFMT_S16_LE, 2, 0),
SND_FORMAT(AFMT_U16_LE, 1, 0),
SND_FORMAT(AFMT_U16_LE, 2, 0),
0
};
static struct pcmchan_caps bcm2835_audio_playcaps = {8000, 48000, bcm2835_audio_playfmt, 0};
struct bcm2835_audio_info;
#define PLAYBACK_IDLE 0
#define PLAYBACK_STARTING 1
#define PLAYBACK_PLAYING 2
#define PLAYBACK_STOPPING 3
struct bcm2835_audio_chinfo {
struct bcm2835_audio_info *parent;
struct pcm_channel *channel;
struct snd_dbuf *buffer;
uint32_t fmt, spd, blksz;
uint32_t complete_pos;
uint32_t free_buffer;
uint32_t buffered_ptr;
int playback_state;
};
struct bcm2835_audio_info {
device_t dev;
unsigned int bufsz;
struct bcm2835_audio_chinfo pch;
uint32_t dest, volume;
struct mtx *lock;
struct intr_config_hook intr_hook;
/* VCHI data */
struct mtx vchi_lock;
/* MSG reply */
struct mtx msg_avail_lock;
struct cv msg_avail_cv;
uint32_t msg_result;
VCHI_INSTANCE_T vchi_instance;
VCHI_CONNECTION_T *vchi_connection;
VCHI_SERVICE_HANDLE_T vchi_handle;
struct mtx data_lock;
struct cv data_cv;
/* Unloadign module */
int unloading;
};
#define bcm2835_audio_lock(_ess) snd_mtxlock((_ess)->lock)
#define bcm2835_audio_unlock(_ess) snd_mtxunlock((_ess)->lock)
#define bcm2835_audio_lock_assert(_ess) snd_mtxassert((_ess)->lock)
#define VCHIQ_VCHI_LOCK(sc) mtx_lock(&(sc)->vchi_lock)
#define VCHIQ_VCHI_UNLOCK(sc) mtx_unlock(&(sc)->vchi_lock)
static const char *
dest_description(uint32_t dest)
{
switch (dest) {
case DEST_AUTO:
return "AUTO";
break;
case DEST_HEADPHONES:
return "HEADPHONES";
break;
case DEST_HDMI:
return "HDMI";
break;
default:
return "UNKNOWN";
break;
}
}
static void
bcm2835_audio_callback(void *param, const VCHI_CALLBACK_REASON_T reason, void *msg_handle)
{
struct bcm2835_audio_info *sc = (struct bcm2835_audio_info *)param;
int32_t status;
uint32_t msg_len;
VC_AUDIO_MSG_T m;
if (reason != VCHI_CALLBACK_MSG_AVAILABLE)
return;
status = vchi_msg_dequeue(sc->vchi_handle,
&m, sizeof m, &msg_len, VCHI_FLAGS_NONE);
if (m.type == VC_AUDIO_MSG_TYPE_RESULT) {
sc->msg_result = m.u.result.success;
cv_signal(&sc->msg_avail_cv);
} else if (m.type == VC_AUDIO_MSG_TYPE_COMPLETE) {
struct bcm2835_audio_chinfo *ch = m.u.complete.cookie;
int count = m.u.complete.count & 0xffff;
int perr = (m.u.complete.count & (1U << 30)) != 0;
ch->complete_pos = (ch->complete_pos + count) % sndbuf_getsize(ch->buffer);
ch->free_buffer += count;
if (perr || ch->free_buffer >= VCHIQ_AUDIO_PACKET_SIZE) {
chn_intr(ch->channel);
cv_signal(&sc->data_cv);
}
} else
printf("%s: unknown m.type: %d\n", __func__, m.type);
}
/* VCHIQ stuff */
static void
bcm2835_audio_init(struct bcm2835_audio_info *sc)
{
int status;
/* Initialize and create a VCHI connection */
status = vchi_initialise(&sc->vchi_instance);
if (status != 0) {
printf("vchi_initialise failed: %d\n", status);
return;
}
status = vchi_connect(NULL, 0, sc->vchi_instance);
if (status != 0) {
printf("vchi_connect failed: %d\n", status);
return;
}
SERVICE_CREATION_T params = {
VCHI_VERSION_EX(VC_AUDIOSERV_VER, VC_AUDIOSERV_MIN_VER),
VC_AUDIO_SERVER_NAME, /* 4cc service code */
sc->vchi_connection, /* passed in fn pointers */
0, /* rx fifo size */
0, /* tx fifo size */
bcm2835_audio_callback, /* service callback */
sc, /* service callback parameter */
1,
1,
0 /* want crc check on bulk transfers */
};
status = vchi_service_open(sc->vchi_instance, &params,
&sc->vchi_handle);
if (status == 0)
/* Finished with the service for now */
vchi_service_release(sc->vchi_handle);
else
sc->vchi_handle = VCHIQ_SERVICE_HANDLE_INVALID;
}
static void
bcm2835_audio_release(struct bcm2835_audio_info *sc)
{
int success;
if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
vchi_service_use(sc->vchi_handle);
success = vchi_service_close(sc->vchi_handle);
if (success != 0)
printf("vchi_service_close failed: %d\n", success);
sc->vchi_handle = VCHIQ_SERVICE_HANDLE_INVALID;
}
vchi_disconnect(sc->vchi_instance);
}
static void
bcm2835_audio_reset_channel(struct bcm2835_audio_chinfo *ch)
{
ch->free_buffer = VCHIQ_AUDIO_BUFFER_SIZE;
ch->playback_state = 0;
ch->buffered_ptr = 0;
ch->complete_pos = 0;
sndbuf_reset(ch->buffer);
}
static void
bcm2835_audio_start(struct bcm2835_audio_chinfo *ch)
{
VC_AUDIO_MSG_T m;
int ret;
struct bcm2835_audio_info *sc = ch->parent;
VCHIQ_VCHI_LOCK(sc);
if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
vchi_service_use(sc->vchi_handle);
bcm2835_audio_reset_channel(ch);
m.type = VC_AUDIO_MSG_TYPE_START;
ret = vchi_msg_queue(sc->vchi_handle,
&m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
if (ret != 0)
printf("%s: vchi_msg_queue failed (err %d)\n", __func__, ret);
vchi_service_release(sc->vchi_handle);
}
VCHIQ_VCHI_UNLOCK(sc);
}
static void
bcm2835_audio_stop(struct bcm2835_audio_chinfo *ch)
{
VC_AUDIO_MSG_T m;
int ret;
struct bcm2835_audio_info *sc = ch->parent;
VCHIQ_VCHI_LOCK(sc);
if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
vchi_service_use(sc->vchi_handle);
m.type = VC_AUDIO_MSG_TYPE_STOP;
m.u.stop.draining = 0;
ret = vchi_msg_queue(sc->vchi_handle,
&m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
if (ret != 0)
printf("%s: vchi_msg_queue failed (err %d)\n", __func__, ret);
vchi_service_release(sc->vchi_handle);
}
VCHIQ_VCHI_UNLOCK(sc);
}
static void
bcm2835_audio_open(struct bcm2835_audio_info *sc)
{
VC_AUDIO_MSG_T m;
int ret;
VCHIQ_VCHI_LOCK(sc);
if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
vchi_service_use(sc->vchi_handle);
m.type = VC_AUDIO_MSG_TYPE_OPEN;
ret = vchi_msg_queue(sc->vchi_handle,
&m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
if (ret != 0)
printf("%s: vchi_msg_queue failed (err %d)\n", __func__, ret);
vchi_service_release(sc->vchi_handle);
}
VCHIQ_VCHI_UNLOCK(sc);
}
static void
bcm2835_audio_update_controls(struct bcm2835_audio_info *sc)
{
VC_AUDIO_MSG_T m;
int ret, db;
VCHIQ_VCHI_LOCK(sc);
if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
vchi_service_use(sc->vchi_handle);
sc->msg_result = -1;
m.type = VC_AUDIO_MSG_TYPE_CONTROL;
m.u.control.dest = sc->dest;
if (sc->volume > 99)
sc->volume = 99;
db = db_levels[sc->volume/5];
m.u.control.volume = VCHIQ_AUDIO_VOLUME(db);
ret = vchi_msg_queue(sc->vchi_handle,
&m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
if (ret != 0)
printf("%s: vchi_msg_queue failed (err %d)\n", __func__, ret);
mtx_lock(&sc->msg_avail_lock);
cv_wait_sig(&sc->msg_avail_cv, &sc->msg_avail_lock);
if (sc->msg_result)
printf("%s failed: %d\n", __func__, sc->msg_result);
mtx_unlock(&sc->msg_avail_lock);
vchi_service_release(sc->vchi_handle);
}
VCHIQ_VCHI_UNLOCK(sc);
}
static void
bcm2835_audio_update_params(struct bcm2835_audio_info *sc, struct bcm2835_audio_chinfo *ch)
{
VC_AUDIO_MSG_T m;
int ret;
VCHIQ_VCHI_LOCK(sc);
if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) {
vchi_service_use(sc->vchi_handle);
sc->msg_result = -1;
m.type = VC_AUDIO_MSG_TYPE_CONFIG;
m.u.config.channels = AFMT_CHANNEL(ch->fmt);
m.u.config.samplerate = ch->spd;
m.u.config.bps = AFMT_BIT(ch->fmt);
ret = vchi_msg_queue(sc->vchi_handle,
&m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
if (ret != 0)
printf("%s: vchi_msg_queue failed (err %d)\n", __func__, ret);
mtx_lock(&sc->msg_avail_lock);
cv_wait_sig(&sc->msg_avail_cv, &sc->msg_avail_lock);
if (sc->msg_result)
printf("%s failed: %d\n", __func__, sc->msg_result);
mtx_unlock(&sc->msg_avail_lock);
vchi_service_release(sc->vchi_handle);
}
VCHIQ_VCHI_UNLOCK(sc);
}
static __inline uint32_t
vchiq_unbuffered_bytes(struct bcm2835_audio_chinfo *ch)
{
uint32_t size, ready, readyptr, readyend;
size = sndbuf_getsize(ch->buffer);
readyptr = sndbuf_getreadyptr(ch->buffer);
ready = sndbuf_getready(ch->buffer);
readyend = readyptr + ready;
/* Normal case */
if (ch->buffered_ptr >= readyptr) {
if (readyend > ch->buffered_ptr)
return readyend - ch->buffered_ptr;
else
return 0;
}
else { /* buffered_ptr overflow */
if (readyend > ch->buffered_ptr + size)
return readyend - ch->buffered_ptr - size;
else
return 0;
}
}
static void
bcm2835_audio_write_samples(struct bcm2835_audio_chinfo *ch)
{
struct bcm2835_audio_info *sc = ch->parent;
VC_AUDIO_MSG_T m;
void *buf;
uint32_t count, size;
int ret;
VCHIQ_VCHI_LOCK(sc);
if (sc->vchi_handle == VCHIQ_SERVICE_HANDLE_INVALID) {
VCHIQ_VCHI_UNLOCK(sc);
return;
}
vchi_service_use(sc->vchi_handle);
size = sndbuf_getsize(ch->buffer);
count = vchiq_unbuffered_bytes(ch);
buf = (uint8_t*)sndbuf_getbuf(ch->buffer) + ch->buffered_ptr;
if (ch->buffered_ptr + count > size)
count = size - ch->buffered_ptr;
if (count < VCHIQ_AUDIO_PACKET_SIZE)
goto done;
count = min(count, ch->free_buffer);
count -= count % VCHIQ_AUDIO_PACKET_SIZE;
m.type = VC_AUDIO_MSG_TYPE_WRITE;
m.u.write.count = count;
m.u.write.max_packet = VCHIQ_AUDIO_PACKET_SIZE;
m.u.write.callback = NULL;
m.u.write.cookie = ch;
if (buf)
m.u.write.silence = 0;
else
m.u.write.silence = 1;
ret = vchi_msg_queue(sc->vchi_handle,
&m, sizeof m, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
if (ret != 0)
printf("%s: vchi_msg_queue failed (err %d)\n", __func__, ret);
if (buf) {
while (count > 0) {
int bytes = MIN((int)m.u.write.max_packet, (int)count);
ch->free_buffer -= bytes;
ch->buffered_ptr += bytes;
ch->buffered_ptr = ch->buffered_ptr % size;
ret = vchi_msg_queue(sc->vchi_handle,
buf, bytes, VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL);
if (ret != 0)
printf("%s: vchi_msg_queue failed: %d\n",
__func__, ret);
buf = (char *)buf + bytes;
count -= bytes;
}
}
done:
vchi_service_release(sc->vchi_handle);
VCHIQ_VCHI_UNLOCK(sc);
}
static void
bcm2835_audio_worker(void *data)
{
struct bcm2835_audio_info *sc = (struct bcm2835_audio_info *)data;
struct bcm2835_audio_chinfo *ch = &sc->pch;
mtx_lock(&sc->data_lock);
while(1) {
if (sc->unloading)
break;
if ((ch->playback_state == PLAYBACK_PLAYING) &&
(vchiq_unbuffered_bytes(ch) >= VCHIQ_AUDIO_PACKET_SIZE)
&& (ch->free_buffer >= VCHIQ_AUDIO_PACKET_SIZE)) {
bcm2835_audio_write_samples(ch);
} else {
if (ch->playback_state == PLAYBACK_STOPPING) {
bcm2835_audio_reset_channel(&sc->pch);
ch->playback_state = PLAYBACK_IDLE;
}
cv_wait_sig(&sc->data_cv, &sc->data_lock);
if (ch->playback_state == PLAYBACK_STARTING) {
/* Give it initial kick */
chn_intr(sc->pch.channel);
ch->playback_state = PLAYBACK_PLAYING;
}
}
}
mtx_unlock(&sc->data_lock);
kproc_exit(0);
}
static void
bcm2835_audio_create_worker(struct bcm2835_audio_info *sc)
{
struct proc *newp;
if (kproc_create(bcm2835_audio_worker, (void*)sc, &newp, 0, 0,
"bcm2835_audio_worker") != 0) {
printf("failed to create bcm2835_audio_worker\n");
}
}
/* -------------------------------------------------------------------- */
/* channel interface for ESS18xx */
static void *
bcmchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
{
struct bcm2835_audio_info *sc = devinfo;
struct bcm2835_audio_chinfo *ch = &sc->pch;
void *buffer;
if (dir == PCMDIR_REC)
return NULL;
ch->parent = sc;
ch->channel = c;
ch->buffer = b;
/* default values */
ch->spd = 44100;
ch->fmt = SND_FORMAT(AFMT_S16_LE, 2, 0);
ch->blksz = VCHIQ_AUDIO_PACKET_SIZE;
buffer = malloc(sc->bufsz, M_DEVBUF, M_WAITOK | M_ZERO);
if (sndbuf_setup(ch->buffer, buffer, sc->bufsz) != 0) {
free(buffer, M_DEVBUF);
return NULL;
}
bcm2835_audio_update_params(sc, ch);
return ch;
}
static int
bcmchan_free(kobj_t obj, void *data)
{
struct bcm2835_audio_chinfo *ch = data;
void *buffer;
buffer = sndbuf_getbuf(ch->buffer);
if (buffer)
free(buffer, M_DEVBUF);
return (0);
}
static int
bcmchan_setformat(kobj_t obj, void *data, uint32_t format)
{
struct bcm2835_audio_chinfo *ch = data;
struct bcm2835_audio_info *sc = ch->parent;
bcm2835_audio_lock(sc);
ch->fmt = format;
bcm2835_audio_update_params(sc, ch);
bcm2835_audio_unlock(sc);
return 0;
}
static uint32_t
bcmchan_setspeed(kobj_t obj, void *data, uint32_t speed)
{
struct bcm2835_audio_chinfo *ch = data;
struct bcm2835_audio_info *sc = ch->parent;
bcm2835_audio_lock(sc);
ch->spd = speed;
bcm2835_audio_update_params(sc, ch);
bcm2835_audio_unlock(sc);
return ch->spd;
}
static uint32_t
bcmchan_setblocksize(kobj_t obj, void *data, uint32_t blocksize)
{
struct bcm2835_audio_chinfo *ch = data;
return ch->blksz;
}
static int
bcmchan_trigger(kobj_t obj, void *data, int go)
{
struct bcm2835_audio_chinfo *ch = data;
struct bcm2835_audio_info *sc = ch->parent;
if (!PCMTRIG_COMMON(go))
return (0);
bcm2835_audio_lock(sc);
switch (go) {
case PCMTRIG_START:
bcm2835_audio_start(ch);
ch->playback_state = PLAYBACK_STARTING;
/* wakeup worker thread */
cv_signal(&sc->data_cv);
break;
case PCMTRIG_STOP:
case PCMTRIG_ABORT:
ch->playback_state = 1;
bcm2835_audio_stop(ch);
break;
default:
break;
}
bcm2835_audio_unlock(sc);
return 0;
}
static uint32_t
bcmchan_getptr(kobj_t obj, void *data)
{
struct bcm2835_audio_chinfo *ch = data;
struct bcm2835_audio_info *sc = ch->parent;
uint32_t ret;
bcm2835_audio_lock(sc);
ret = ch->complete_pos - (ch->complete_pos % VCHIQ_AUDIO_PACKET_SIZE);
bcm2835_audio_unlock(sc);
return ret;
}
static struct pcmchan_caps *
bcmchan_getcaps(kobj_t obj, void *data)
{
return &bcm2835_audio_playcaps;
}
static kobj_method_t bcmchan_methods[] = {
KOBJMETHOD(channel_init, bcmchan_init),
KOBJMETHOD(channel_free, bcmchan_free),
KOBJMETHOD(channel_setformat, bcmchan_setformat),
KOBJMETHOD(channel_setspeed, bcmchan_setspeed),
KOBJMETHOD(channel_setblocksize, bcmchan_setblocksize),
KOBJMETHOD(channel_trigger, bcmchan_trigger),
KOBJMETHOD(channel_getptr, bcmchan_getptr),
KOBJMETHOD(channel_getcaps, bcmchan_getcaps),
KOBJMETHOD_END
};
CHANNEL_DECLARE(bcmchan);
/************************************************************/
static int
bcmmix_init(struct snd_mixer *m)
{
mix_setdevs(m, SOUND_MASK_VOLUME);
return (0);
}
static int
bcmmix_set(struct snd_mixer *m, unsigned dev, unsigned left, unsigned right)
{
struct bcm2835_audio_info *sc = mix_getdevinfo(m);
switch (dev) {
case SOUND_MIXER_VOLUME:
sc->volume = left;
bcm2835_audio_update_controls(sc);
break;
default:
break;
}
return left | (left << 8);
}
static kobj_method_t bcmmixer_methods[] = {
KOBJMETHOD(mixer_init, bcmmix_init),
KOBJMETHOD(mixer_set, bcmmix_set),
KOBJMETHOD_END
};
MIXER_DECLARE(bcmmixer);
static int
sysctl_bcm2835_audio_dest(SYSCTL_HANDLER_ARGS)
{
struct bcm2835_audio_info *sc = arg1;
int val;
int err;
val = sc->dest;
err = sysctl_handle_int(oidp, &val, 0, req);
if (err || !req->newptr) /* error || read request */
return (err);
if ((val < 0) || (val > 2))
return (EINVAL);
sc->dest = val;
device_printf(sc->dev, "destination set to %s\n", dest_description(val));
bcm2835_audio_update_controls(sc);
return (0);
}
static void
vchi_audio_sysctl_init(struct bcm2835_audio_info *sc)
{
struct sysctl_ctx_list *ctx;
struct sysctl_oid *tree_node;
struct sysctl_oid_list *tree;
/*
* Add system sysctl tree/handlers.
*/
ctx = device_get_sysctl_ctx(sc->dev);
tree_node = device_get_sysctl_tree(sc->dev);
tree = SYSCTL_CHILDREN(tree_node);
SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "dest",
CTLFLAG_RW | CTLTYPE_UINT, sc, sizeof(*sc),
sysctl_bcm2835_audio_dest, "IU", "audio destination, "
"0 - auto, 1 - headphones, 2 - HDMI");
}
static void
bcm2835_audio_identify(driver_t *driver, device_t parent)
{
BUS_ADD_CHILD(parent, 0, "pcm", 0);
}
static int
bcm2835_audio_probe(device_t dev)
{
device_set_desc(dev, "VCHQI audio");
return (BUS_PROBE_DEFAULT);
}
static void
bcm2835_audio_delayed_init(void *xsc)
{
struct bcm2835_audio_info *sc;
char status[SND_STATUSLEN];
sc = xsc;
config_intrhook_disestablish(&sc->intr_hook);
bcm2835_audio_init(sc);
bcm2835_audio_open(sc);
sc->volume = 75;
sc->dest = DEST_AUTO;
if (mixer_init(sc->dev, &bcmmixer_class, sc)) {
device_printf(sc->dev, "mixer_init failed\n");
goto no;
}
if (pcm_register(sc->dev, sc, 1, 1)) {
device_printf(sc->dev, "pcm_register failed\n");
goto no;
}
pcm_addchan(sc->dev, PCMDIR_PLAY, &bcmchan_class, sc);
snprintf(status, SND_STATUSLEN, "at VCHIQ");
pcm_setstatus(sc->dev, status);
bcm2835_audio_reset_channel(&sc->pch);
bcm2835_audio_create_worker(sc);
vchi_audio_sysctl_init(sc);
no:
;
}
static int
bcm2835_audio_attach(device_t dev)
{
struct bcm2835_audio_info *sc;
sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
sc->dev = dev;
sc->bufsz = VCHIQ_AUDIO_BUFFER_SIZE;
sc->lock = snd_mtxcreate(device_get_nameunit(dev), "bcm2835_audio softc");
mtx_init(&sc->vchi_lock, "bcm2835_audio", "vchi_lock", MTX_DEF);
mtx_init(&sc->msg_avail_lock, "msg_avail_mtx", "msg_avail_mtx", MTX_DEF);
cv_init(&sc->msg_avail_cv, "msg_avail_cv");
mtx_init(&sc->data_lock, "data_mtx", "data_mtx", MTX_DEF);
cv_init(&sc->data_cv, "data_cv");
sc->vchi_handle = VCHIQ_SERVICE_HANDLE_INVALID;
/*
* We need interrupts enabled for VCHI to work properly,
* so delay intialization until it happens
*/
sc->intr_hook.ich_func = bcm2835_audio_delayed_init;
sc->intr_hook.ich_arg = sc;
if (config_intrhook_establish(&sc->intr_hook) != 0)
goto no;
return 0;
no:
return ENXIO;
}
static int
bcm2835_audio_detach(device_t dev)
{
int r;
struct bcm2835_audio_info *sc;
sc = pcm_getdevinfo(dev);
/* Stop worker thread */
sc->unloading = 1;
cv_signal(&sc->data_cv);
r = pcm_unregister(dev);
if (r)
return r;
mtx_destroy(&sc->vchi_lock);
mtx_destroy(&sc->msg_avail_lock);
cv_destroy(&sc->msg_avail_cv);
mtx_destroy(&sc->data_lock);
cv_destroy(&sc->data_cv);
bcm2835_audio_release(sc);
if (sc->lock) {
snd_mtxfree(sc->lock);
sc->lock = NULL;
}
free(sc, M_DEVBUF);
return 0;
}
static device_method_t bcm2835_audio_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, bcm2835_audio_identify),
DEVMETHOD(device_probe, bcm2835_audio_probe),
DEVMETHOD(device_attach, bcm2835_audio_attach),
DEVMETHOD(device_detach, bcm2835_audio_detach),
{ 0, 0 }
};
static driver_t bcm2835_audio_driver = {
"pcm",
bcm2835_audio_methods,
PCM_SOFTC_SIZE,
};
DRIVER_MODULE(bcm2835_audio, vchiq, bcm2835_audio_driver, pcm_devclass, 0, 0);
MODULE_DEPEND(bcm2835_audio, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
MODULE_DEPEND(bcm2835_audio, vchiq, 1, 1, 1);
MODULE_VERSION(bcm2835_audio, 1);

3
sys/arm/broadcom/bcm2835/files.bcm2835
View File

@ -28,6 +28,9 @@ kern/kern_clocksource.c standard
dev/mbox/mbox_if.m standard
dev/ofw/ofw_cpu.c standard
arm/broadcom/bcm2835/bcm2835_audio.c optional sound vchiq \
compile-with "${NORMAL_C} -DUSE_VCHIQ_ARM -D__VCCOREVER__=0x04000000 -I$S/contrib/vchiq"
# VideoCore driver
contrib/vchiq/interface/compat/vchi_bsd.c optional vchiq \
compile-with "${NORMAL_C} -DUSE_VCHIQ_ARM -D__VCCOREVER__=0x04000000 -I$S/contrib/vchiq"

156
sys/arm/broadcom/bcm2835/vc_vchi_audioserv_defs.h Normal file
View File

@ -0,0 +1,156 @@
/*
* Copyright (c) 2012, Broadcom Europe Ltd
* 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.
* 3. Neither the name of the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
*
* $FreeBSD$
*/
#ifndef _VC_AUDIO_DEFS_H_
#define _VC_AUDIO_DEFS_H_
#define VC_AUDIOSERV_MIN_VER 1
#define VC_AUDIOSERV_VER 2
/* FourCC code used for VCHI connection */
#define VC_AUDIO_SERVER_NAME MAKE_FOURCC("AUDS")
/* Maximum message length */
#define VC_AUDIO_MAX_MSG_LEN (sizeof( VC_AUDIO_MSG_T ))
/*
* List of screens that are currently supported
* All message types supported for HOST->VC direction
*/
typedef enum
{
VC_AUDIO_MSG_TYPE_RESULT, /* Generic result */
VC_AUDIO_MSG_TYPE_COMPLETE, /* playback of samples complete */
VC_AUDIO_MSG_TYPE_CONFIG, /* Configure */
VC_AUDIO_MSG_TYPE_CONTROL, /* control */
VC_AUDIO_MSG_TYPE_OPEN, /* open */
VC_AUDIO_MSG_TYPE_CLOSE, /* close/shutdown */
VC_AUDIO_MSG_TYPE_START, /* start output (i.e. resume) */
VC_AUDIO_MSG_TYPE_STOP, /* stop output (i.e. pause) */
VC_AUDIO_MSG_TYPE_WRITE, /* write samples */
VC_AUDIO_MSG_TYPE_MAX
} VC_AUDIO_MSG_TYPE;
static const char *vc_audio_msg_type_names[] = {
"VC_AUDIO_MSG_TYPE_RESULT",
"VC_AUDIO_MSG_TYPE_COMPLETE",
"VC_AUDIO_MSG_TYPE_CONFIG",
"VC_AUDIO_MSG_TYPE_CONTROL",
"VC_AUDIO_MSG_TYPE_OPEN",
"VC_AUDIO_MSG_TYPE_CLOSE",
"VC_AUDIO_MSG_TYPE_START",
"VC_AUDIO_MSG_TYPE_STOP",
"VC_AUDIO_MSG_TYPE_WRITE",
"VC_AUDIO_MSG_TYPE_MAX"
};
/* configure the audio */
typedef struct
{
uint32_t channels;
uint32_t samplerate;
uint32_t bps;
} VC_AUDIO_CONFIG_T;
typedef struct
{
uint32_t volume;
uint32_t dest;
} VC_AUDIO_CONTROL_T;
typedef struct
{
uint32_t dummy;
} VC_AUDIO_OPEN_T;
typedef struct
{
uint32_t dummy;
} VC_AUDIO_CLOSE_T;
typedef struct
{
uint32_t dummy;
} VC_AUDIO_START_T;
typedef struct
{
uint32_t draining;
} VC_AUDIO_STOP_T;
typedef struct
{
uint32_t count; /* in bytes */
void *callback;
void *cookie;
uint16_t silence;
uint16_t max_packet;
} VC_AUDIO_WRITE_T;
/* Generic result for a request (VC->HOST) */
typedef struct
{
int32_t success; /* Success value */
} VC_AUDIO_RESULT_T;
/* Generic result for a request (VC->HOST) */
typedef struct
{
int32_t count; /* Success value */
void *callback;
void *cookie;
} VC_AUDIO_COMPLETE_T;
/* Message header for all messages in HOST->VC direction */
typedef struct
{
int32_t type; /* Message type (VC_AUDIO_MSG_TYPE) */
union
{
VC_AUDIO_CONFIG_T config;
VC_AUDIO_CONTROL_T control;
VC_AUDIO_OPEN_T open;
VC_AUDIO_CLOSE_T close;
VC_AUDIO_START_T start;
VC_AUDIO_STOP_T stop;
VC_AUDIO_WRITE_T write;
VC_AUDIO_RESULT_T result;
VC_AUDIO_COMPLETE_T complete;
} u;
} VC_AUDIO_MSG_T;
#endif /* _VC_AUDIO_DEFS_H_ */

1
sys/arm/conf/RPI-B
View File

@ -130,6 +130,7 @@ device spibus
device bcm2835_spi
device vchiq
device sound
# Flattened Device Tree
options FDT # Configure using FDT/DTB data