diff options
Diffstat (limited to 'sys/arm/broadcom/bcm2835/bcm2835_audio.c')
| -rw-r--r-- | sys/arm/broadcom/bcm2835/bcm2835_audio.c | 968 |
1 files changed, 968 insertions, 0 deletions
diff --git a/sys/arm/broadcom/bcm2835/bcm2835_audio.c b/sys/arm/broadcom/bcm2835/bcm2835_audio.c new file mode 100644 index 000000000000..ae2c9a14fc62 --- /dev/null +++ b/sys/arm/broadcom/bcm2835/bcm2835_audio.c @@ -0,0 +1,968 @@ +/*- + * 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("$FreeBSD$"); + +/* Audio destination */ +#define DEST_AUTO 0 +#define DEST_HEADPHONES 1 +#define DEST_HDMI 2 + +/* Playback state */ +#define PLAYBACK_IDLE 0 +#define PLAYBACK_PLAYING 1 +#define PLAYBACK_STOPPING 2 + +/* Worker thread state */ +#define WORKER_RUNNING 0 +#define WORKER_STOPPING 1 +#define WORKER_STOPPED 2 + +/* + * Worker thread flags, set to 1 in flags_pending + * when driver requests one or another operation + * from worker. Cleared to 0 once worker performs + * the operations. + */ +#define AUDIO_PARAMS (1 << 0) +#define AUDIO_PLAY (1 << 1) +#define AUDIO_STOP (1 << 2) + +#define VCHIQ_AUDIO_PACKET_SIZE 4000 +#define VCHIQ_AUDIO_BUFFER_SIZE 10*VCHIQ_AUDIO_PACKET_SIZE + +#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; + +struct bcm2835_audio_chinfo { + struct bcm2835_audio_info *parent; + struct pcm_channel *channel; + struct snd_dbuf *buffer; + uint32_t fmt, spd, blksz; + + /* Pointer to first unsubmitted sample */ + uint32_t unsubmittedptr; + /* + * Number of bytes in "submitted but not played" + * pseudo-buffer + */ + int available_space; + int playback_state; + uint64_t callbacks; + uint64_t submitted_samples; + uint64_t retrieved_samples; + uint64_t underruns; + int starved; +}; + +struct bcm2835_audio_info { + device_t dev; + unsigned int bufsz; + struct bcm2835_audio_chinfo pch; + uint32_t dest, volume; + struct intr_config_hook intr_hook; + + /* VCHI data */ + VCHI_INSTANCE_T vchi_instance; + VCHI_CONNECTION_T *vchi_connection; + VCHI_SERVICE_HANDLE_T vchi_handle; + + struct mtx lock; + struct cv worker_cv; + + uint32_t flags_pending; + + /* Worker thread state */ + int worker_state; +}; + +#define BCM2835_AUDIO_LOCK(sc) mtx_lock(&(sc)->lock) +#define BCM2835_AUDIO_LOCKED(sc) mtx_assert(&(sc)->lock, MA_OWNED) +#define BCM2835_AUDIO_UNLOCK(sc) mtx_unlock(&(sc)->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_worker_update_params(struct bcm2835_audio_info *sc) +{ + + BCM2835_AUDIO_LOCKED(sc); + + sc->flags_pending |= AUDIO_PARAMS; + cv_signal(&sc->worker_cv); +} + +static void +bcm2835_worker_play_start(struct bcm2835_audio_info *sc) +{ + BCM2835_AUDIO_LOCK(sc); + sc->flags_pending &= ~(AUDIO_STOP); + sc->flags_pending |= AUDIO_PLAY; + cv_signal(&sc->worker_cv); + BCM2835_AUDIO_UNLOCK(sc); +} + +static void +bcm2835_worker_play_stop(struct bcm2835_audio_info *sc) +{ + BCM2835_AUDIO_LOCK(sc); + sc->flags_pending &= ~(AUDIO_PLAY); + sc->flags_pending |= AUDIO_STOP; + cv_signal(&sc->worker_cv); + BCM2835_AUDIO_UNLOCK(sc); +} + +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) { + if (m.u.result.success) { + device_printf(sc->dev, + "msg type %08x failed\n", + m.type); + } + } 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->callbacks++; + if (perr) + ch->underruns++; + + BCM2835_AUDIO_LOCK(sc); + if (ch->playback_state != PLAYBACK_IDLE) { + /* Prevent LOR */ + BCM2835_AUDIO_UNLOCK(sc); + chn_intr(sc->pch.channel); + BCM2835_AUDIO_LOCK(sc); + } + /* We should check again, state might have changed */ + if (ch->playback_state != PLAYBACK_IDLE) { + if (!perr) { + if ((ch->available_space + count)> VCHIQ_AUDIO_BUFFER_SIZE) { + device_printf(sc->dev, "inconsistent data in callback:\n"); + device_printf(sc->dev, "available_space == %d, count = %d, perr=%d\n", + ch->available_space, count, perr); + device_printf(sc->dev, + "retrieved_samples = %lld, submitted_samples = %lld\n", + ch->retrieved_samples, ch->submitted_samples); + } + ch->available_space += count; + ch->retrieved_samples += count; + } + if (perr || (ch->available_space >= VCHIQ_AUDIO_PACKET_SIZE)) + cv_signal(&sc->worker_cv); + } + BCM2835_AUDIO_UNLOCK(sc); + } 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, ¶ms, + &sc->vchi_handle); + + if (status != 0) + 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) { + success = vchi_service_close(sc->vchi_handle); + if (success != 0) + printf("vchi_service_close failed: %d\n", success); + vchi_service_release(sc->vchi_handle); + sc->vchi_handle = VCHIQ_SERVICE_HANDLE_INVALID; + } + + vchi_disconnect(sc->vchi_instance); +} + +static void +bcm2835_audio_reset_channel(struct bcm2835_audio_chinfo *ch) +{ + + ch->available_space = VCHIQ_AUDIO_BUFFER_SIZE; + ch->unsubmittedptr = 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; + + if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) { + 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); + } +} + +static void +bcm2835_audio_stop(struct bcm2835_audio_chinfo *ch) +{ + VC_AUDIO_MSG_T m; + int ret; + struct bcm2835_audio_info *sc = ch->parent; + + if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) { + 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); + } +} + +static void +bcm2835_audio_open(struct bcm2835_audio_info *sc) +{ + VC_AUDIO_MSG_T m; + int ret; + + if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) { + 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); + } +} + +static void +bcm2835_audio_update_controls(struct bcm2835_audio_info *sc, uint32_t volume, uint32_t dest) +{ + VC_AUDIO_MSG_T m; + int ret, db; + + if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) { + m.type = VC_AUDIO_MSG_TYPE_CONTROL; + m.u.control.dest = dest; + if (volume > 99) + volume = 99; + db = db_levels[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); + } +} + +static void +bcm2835_audio_update_params(struct bcm2835_audio_info *sc, uint32_t fmt, uint32_t speed) +{ + VC_AUDIO_MSG_T m; + int ret; + + if (sc->vchi_handle != VCHIQ_SERVICE_HANDLE_INVALID) { + m.type = VC_AUDIO_MSG_TYPE_CONFIG; + m.u.config.channels = AFMT_CHANNEL(fmt); + m.u.config.samplerate = speed; + m.u.config.bps = AFMT_BIT(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); + } +} + +static bool +bcm2835_audio_buffer_should_sleep(struct bcm2835_audio_chinfo *ch) +{ + + if (ch->playback_state != PLAYBACK_PLAYING) + return (true); + + /* Not enough data */ + if (sndbuf_getready(ch->buffer) < VCHIQ_AUDIO_PACKET_SIZE) { + printf("starve\n"); + ch->starved++; + return (true); + } + + /* Not enough free space */ + if (ch->available_space < VCHIQ_AUDIO_PACKET_SIZE) { + return (true); + } + + return (false); +} + +static void +bcm2835_audio_write_samples(struct bcm2835_audio_chinfo *ch, void *buf, uint32_t count) +{ + struct bcm2835_audio_info *sc = ch->parent; + VC_AUDIO_MSG_T m; + int ret; + + if (sc->vchi_handle == VCHIQ_SERVICE_HANDLE_INVALID) { + return; + } + + 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; + m.u.write.silence = 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); + + while (count > 0) { + int bytes = MIN((int)m.u.write.max_packet, (int)count); + 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; + } +} + +static void +bcm2835_audio_worker(void *data) +{ + struct bcm2835_audio_info *sc = (struct bcm2835_audio_info *)data; + struct bcm2835_audio_chinfo *ch = &sc->pch; + uint32_t speed, format; + uint32_t volume, dest; + uint32_t flags; + uint32_t count, size, readyptr; + uint8_t *buf; + + ch->playback_state = PLAYBACK_IDLE; + + while (1) { + if (sc->worker_state != WORKER_RUNNING) + break; + + BCM2835_AUDIO_LOCK(sc); + /* + * wait until there are flags set or buffer is ready + * to consume more samples + */ + while ((sc->flags_pending == 0) && + bcm2835_audio_buffer_should_sleep(ch)) { + cv_wait_sig(&sc->worker_cv, &sc->lock); + } + flags = sc->flags_pending; + /* Clear pending flags */ + sc->flags_pending = 0; + BCM2835_AUDIO_UNLOCK(sc); + + /* Requested to change parameters */ + if (flags & AUDIO_PARAMS) { + BCM2835_AUDIO_LOCK(sc); + speed = ch->spd; + format = ch->fmt; + volume = sc->volume; + dest = sc->dest; + BCM2835_AUDIO_UNLOCK(sc); + if (ch->playback_state == PLAYBACK_IDLE) + bcm2835_audio_update_params(sc, format, speed); + bcm2835_audio_update_controls(sc, volume, dest); + } + + /* Requested to stop playback */ + if ((flags & AUDIO_STOP) && + (ch->playback_state == PLAYBACK_PLAYING)) { + bcm2835_audio_stop(ch); + BCM2835_AUDIO_LOCK(sc); + bcm2835_audio_reset_channel(&sc->pch); + ch->playback_state = PLAYBACK_IDLE; + BCM2835_AUDIO_UNLOCK(sc); + continue; + } + + /* Requested to start playback */ + if ((flags & AUDIO_PLAY) && + (ch->playback_state == PLAYBACK_IDLE)) { + BCM2835_AUDIO_LOCK(sc); + ch->playback_state = PLAYBACK_PLAYING; + BCM2835_AUDIO_UNLOCK(sc); + bcm2835_audio_start(ch); + } + + if (ch->playback_state == PLAYBACK_IDLE) + continue; + + if (sndbuf_getready(ch->buffer) == 0) + continue; + + count = sndbuf_getready(ch->buffer); + size = sndbuf_getsize(ch->buffer); + readyptr = sndbuf_getreadyptr(ch->buffer); + + BCM2835_AUDIO_LOCK(sc); + if (readyptr + count > size) + count = size - readyptr; + count = min(count, ch->available_space); + count -= (count % VCHIQ_AUDIO_PACKET_SIZE); + BCM2835_AUDIO_UNLOCK(sc); + + if (count < VCHIQ_AUDIO_PACKET_SIZE) + continue; + + buf = (uint8_t*)sndbuf_getbuf(ch->buffer) + readyptr; + + bcm2835_audio_write_samples(ch, buf, count); + BCM2835_AUDIO_LOCK(sc); + ch->unsubmittedptr = (ch->unsubmittedptr + count) % sndbuf_getsize(ch->buffer); + ch->available_space -= count; + ch->submitted_samples += count; + KASSERT(ch->available_space >= 0, ("ch->available_space == %d\n", ch->available_space)); + BCM2835_AUDIO_UNLOCK(sc); + } + + BCM2835_AUDIO_LOCK(sc); + sc->worker_state = WORKER_STOPPED; + cv_signal(&sc->worker_cv); + BCM2835_AUDIO_UNLOCK(sc); + + kproc_exit(0); +} + +static void +bcm2835_audio_create_worker(struct bcm2835_audio_info *sc) +{ + struct proc *newp; + + sc->worker_state = WORKER_RUNNING; + 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 VCHI audio */ +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) { + device_printf(sc->dev, "sndbuf_setup failed\n"); + free(buffer, M_DEVBUF); + return NULL; + } + + BCM2835_AUDIO_LOCK(sc); + bcm2835_worker_update_params(sc); + BCM2835_AUDIO_UNLOCK(sc); + + 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_worker_update_params(sc); + 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_worker_update_params(sc); + 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); + + switch (go) { + case PCMTRIG_START: + /* kickstart data flow */ + chn_intr(sc->pch.channel); + ch->submitted_samples = 0; + ch->retrieved_samples = 0; + bcm2835_worker_play_start(sc); + break; + + case PCMTRIG_STOP: + case PCMTRIG_ABORT: + bcm2835_worker_play_stop(sc); + break; + + default: + break; + } + 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->unsubmittedptr; + 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: + BCM2835_AUDIO_LOCK(sc); + sc->volume = left; + bcm2835_worker_update_params(sc); + BCM2835_AUDIO_UNLOCK(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); + + BCM2835_AUDIO_LOCK(sc); + sc->dest = val; + bcm2835_worker_update_params(sc); + BCM2835_AUDIO_UNLOCK(sc); + + if (bootverbose) + device_printf(sc->dev, "destination set to %s\n", dest_description(val)); + + 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 | CTLFLAG_NEEDGIANT, sc, sizeof(*sc), + sysctl_bcm2835_audio_dest, "IU", "audio destination, " + "0 - auto, 1 - headphones, 2 - HDMI"); + SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "callbacks", + CTLFLAG_RD, &sc->pch.callbacks, + "callbacks total"); + SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "submitted", + CTLFLAG_RD, &sc->pch.submitted_samples, + "last play submitted samples"); + SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "retrieved", + CTLFLAG_RD, &sc->pch.retrieved_samples, + "last play retrieved samples"); + SYSCTL_ADD_UQUAD(ctx, tree, OID_AUTO, "underruns", + CTLFLAG_RD, &sc->pch.underruns, + "callback underruns"); + SYSCTL_ADD_INT(ctx, tree, OID_AUTO, "freebuffer", + CTLFLAG_RD, &sc->pch.available_space, + sc->pch.available_space, "callbacks total"); + SYSCTL_ADD_INT(ctx, tree, OID_AUTO, "starved", + CTLFLAG_RD, &sc->pch.starved, + sc->pch.starved, "number of starved conditions"); +} + +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, "VCHIQ 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, 0)) { + 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; + + mtx_init(&sc->lock, device_get_nameunit(dev), + "bcm_audio_lock", MTX_DEF); + cv_init(&sc->worker_cv, "worker_cv"); + sc->vchi_handle = VCHIQ_SERVICE_HANDLE_INVALID; + + /* + * We need interrupts enabled for VCHI to work properly, + * so delay initialization 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 */ + BCM2835_AUDIO_LOCK(sc); + sc->worker_state = WORKER_STOPPING; + cv_signal(&sc->worker_cv); + /* Wait for thread to exit */ + while (sc->worker_state != WORKER_STOPPED) + cv_wait_sig(&sc->worker_cv, &sc->lock); + BCM2835_AUDIO_UNLOCK(sc); + + r = pcm_unregister(dev); + if (r) + return r; + + mtx_destroy(&sc->lock); + cv_destroy(&sc->worker_cv); + + bcm2835_audio_release(sc); + + 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); |