From 7868fb252f8846b21a00b9a42a8bfa10f1c969ee Mon Sep 17 00:00:00 2001 From: popcornmix Date: Mon, 26 Mar 2012 22:15:50 +0100 Subject: [PATCH 007/174] bcm2708: alsa sound driver Signed-off-by: popcornmix --- arch/arm/configs/bcmrpi_cutdown_defconfig | 20 + arch/arm/configs/bcmrpi_defconfig | 20 + arch/arm/mach-bcm2708/bcm2708.c | 12 + sound/arm/Kconfig | 7 + sound/arm/Makefile | 6 + sound/arm/bcm2835-ctl.c | 200 +++++++ sound/arm/bcm2835-pcm.c | 409 +++++++++++++++ sound/arm/bcm2835-vchiq.c | 844 ++++++++++++++++++++++++++++++ sound/arm/bcm2835.c | 413 +++++++++++++++ sound/arm/bcm2835.h | 155 ++++++ sound/arm/vc_vchi_audioserv_defs.h | 116 ++++ 11 files changed, 2202 insertions(+) create mode 100755 sound/arm/bcm2835-ctl.c create mode 100755 sound/arm/bcm2835-pcm.c create mode 100755 sound/arm/bcm2835-vchiq.c create mode 100755 sound/arm/bcm2835.c create mode 100755 sound/arm/bcm2835.h create mode 100644 sound/arm/vc_vchi_audioserv_defs.h --- a/arch/arm/configs/bcmrpi_cutdown_defconfig +++ b/arch/arm/configs/bcmrpi_cutdown_defconfig @@ -208,6 +208,26 @@ CONFIG_FRAMEBUFFER_CONSOLE=y CONFIG_LOGO=y # CONFIG_LOGO_LINUX_MONO is not set # CONFIG_LOGO_LINUX_VGA16 is not set +CONFIG_SOUND=y +CONFIG_SND=m +CONFIG_SND_SEQUENCER=m +CONFIG_SND_SEQ_DUMMY=m +CONFIG_SND_MIXER_OSS=m +CONFIG_SND_PCM_OSS=m +CONFIG_SND_SEQUENCER_OSS=y +CONFIG_SND_HRTIMER=m +CONFIG_SND_DUMMY=m +CONFIG_SND_ALOOP=m +CONFIG_SND_VIRMIDI=m +CONFIG_SND_MTPAV=m +CONFIG_SND_SERIAL_U16550=m +CONFIG_SND_MPU401=m +CONFIG_SND_BCM2835=m +CONFIG_SND_USB_AUDIO=m +CONFIG_SND_USB_UA101=m +CONFIG_SND_USB_CAIAQ=m +CONFIG_SND_USB_6FIRE=m +CONFIG_SOUND_PRIME=m CONFIG_HID_PID=y CONFIG_USB_HIDDEV=y CONFIG_HID_A4TECH=m --- a/arch/arm/configs/bcmrpi_defconfig +++ b/arch/arm/configs/bcmrpi_defconfig @@ -225,6 +225,26 @@ CONFIG_FRAMEBUFFER_CONSOLE=y CONFIG_LOGO=y # CONFIG_LOGO_LINUX_MONO is not set # CONFIG_LOGO_LINUX_VGA16 is not set +CONFIG_SOUND=y +CONFIG_SND=m +CONFIG_SND_SEQUENCER=m +CONFIG_SND_SEQ_DUMMY=m +CONFIG_SND_MIXER_OSS=m +CONFIG_SND_PCM_OSS=m +CONFIG_SND_SEQUENCER_OSS=y +CONFIG_SND_HRTIMER=m +CONFIG_SND_DUMMY=m +CONFIG_SND_ALOOP=m +CONFIG_SND_VIRMIDI=m +CONFIG_SND_MTPAV=m +CONFIG_SND_SERIAL_U16550=m +CONFIG_SND_MPU401=m +CONFIG_SND_BCM2835=m +CONFIG_SND_USB_AUDIO=m +CONFIG_SND_USB_UA101=m +CONFIG_SND_USB_CAIAQ=m +CONFIG_SND_USB_6FIRE=m +CONFIG_SOUND_PRIME=m CONFIG_HID_PID=y CONFIG_USB_HIDDEV=y CONFIG_HID_A4TECH=m --- a/arch/arm/mach-bcm2708/bcm2708.c +++ b/arch/arm/mach-bcm2708/bcm2708.c @@ -424,6 +424,16 @@ struct platform_device bcm2708_powerman_ .coherent_dma_mask = 0xffffffffUL}, }; + +static struct platform_device bcm2708_alsa_devices[] = { + [0] = { + .name = "bcm2835_AUD0", + .id = 0, /* first audio device */ + .resource = 0, + .num_resources = 0, + }, +}; + int __init bcm_register_device(struct platform_device *pdev) { int ret; @@ -529,6 +539,8 @@ void __init bcm2708_init(void) bcm_register_device(&bcm2708_emmc_device); #endif bcm2708_init_led(); + for (i = 0; i < ARRAY_SIZE(bcm2708_alsa_devices); i++) + bcm_register_device(&bcm2708_alsa_devices[i]); for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { struct amba_device *d = amba_devs[i]; --- a/sound/arm/Kconfig +++ b/sound/arm/Kconfig @@ -39,5 +39,12 @@ config SND_PXA2XX_AC97 Say Y or M if you want to support any AC97 codec attached to the PXA2xx AC97 interface. +config SND_BCM2835 + tristate "BCM2835 ALSA driver" + depends on ARCH_BCM2708 && BCM2708_VCHIQ && SND + select SND_PCM + help + Say Y or M if you want to support BCM2835 Alsa pcm card driver + endif # SND_ARM --- a/sound/arm/Makefile +++ b/sound/arm/Makefile @@ -14,3 +14,9 @@ snd-pxa2xx-lib-$(CONFIG_SND_PXA2XX_LIB_A obj-$(CONFIG_SND_PXA2XX_AC97) += snd-pxa2xx-ac97.o snd-pxa2xx-ac97-objs := pxa2xx-ac97.o + +obj-$(CONFIG_SND_BCM2835) += snd-bcm2835.o +snd-bcm2835-objs := bcm2835.o bcm2835-ctl.o bcm2835-pcm.o bcm2835-vchiq.o + +EXTRA_CFLAGS += -Idrivers/misc/vc04_services -Idrivers/misc/vc04_services/interface/vcos/linuxkernel -D__VCCOREVER__=0x04000000 + --- /dev/null +++ b/sound/arm/bcm2835-ctl.c @@ -0,0 +1,200 @@ +/***************************************************************************** +* Copyright 2011 Broadcom Corporation. All rights reserved. +* +* Unless you and Broadcom execute a separate written software license +* agreement governing use of this software, this software is licensed to you +* under the terms of the GNU General Public License version 2, available at +* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). +* +* Notwithstanding the above, under no circumstances may you combine this +* software in any way with any other Broadcom software provided under a +* license other than the GPL, without Broadcom's express prior written +* consent. +*****************************************************************************/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#include "bcm2835.h" + +/* volume maximum and minimum in terms of 0.01dB */ +#define CTRL_VOL_MAX 400 +#define CTRL_VOL_MIN -10239 /* originally -10240 */ + + +static int snd_bcm2835_ctl_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + audio_info(" ... IN\n"); + if (kcontrol->private_value == PCM_PLAYBACK_VOLUME) { + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 1; + uinfo->value.integer.min = CTRL_VOL_MIN; + uinfo->value.integer.max = CTRL_VOL_MAX; /* 2303 */ + } else if (kcontrol->private_value == PCM_PLAYBACK_MUTE) { + uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 1; + } else if (kcontrol->private_value == PCM_PLAYBACK_DEVICE) { + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 1; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = AUDIO_DEST_MAX-1; + } + audio_info(" ... OUT\n"); + return 0; +} + +/* toggles mute on or off depending on the value of nmute, and returns + * 1 if the mute value was changed, otherwise 0 + */ +static int toggle_mute(struct bcm2835_chip *chip, int nmute) +{ + /* if settings are ok, just return 0 */ + if(chip->mute == nmute) + return 0; + + /* if the sound is muted then we need to unmute */ + if(chip->mute == CTRL_VOL_MUTE) + { + chip->volume = chip->old_volume; /* copy the old volume back */ + audio_info("Unmuting, old_volume = %d, volume = %d ...\n", chip->old_volume, chip->volume); + } + else /* otherwise we mute */ + { + chip->old_volume = chip->volume; + chip->volume = 26214; /* set volume to minimum level AKA mute */ + audio_info("Muting, old_volume = %d, volume = %d ...\n", chip->old_volume, chip->volume); + } + + chip->mute = nmute; + return 1; +} + +static int snd_bcm2835_ctl_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol); + + BUG_ON(!chip && !(chip->avail_substreams & AVAIL_SUBSTREAMS_MASK)); + + if (kcontrol->private_value == PCM_PLAYBACK_VOLUME) + ucontrol->value.integer.value[0] = chip2alsa(chip->volume); + else if (kcontrol->private_value == PCM_PLAYBACK_MUTE) + ucontrol->value.integer.value[0] = chip->mute; + else if (kcontrol->private_value == PCM_PLAYBACK_DEVICE) + ucontrol->value.integer.value[0] = chip->dest; + + return 0; +} + +static int snd_bcm2835_ctl_put(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct bcm2835_chip *chip = snd_kcontrol_chip(kcontrol); + int changed = 0; + + if (kcontrol->private_value == PCM_PLAYBACK_VOLUME) { + audio_info("Volume change attempted.. volume = %d new_volume = %d\n", chip->volume, (int)ucontrol->value.integer.value[0]); + if (chip->mute == CTRL_VOL_MUTE) { + /* changed = toggle_mute(chip, CTRL_VOL_UNMUTE); */ + return 1; /* should return 0 to signify no change but the mixer takes this as the opposite sign (no idea why) */ + } + if (changed + || (ucontrol->value.integer.value[0] != chip2alsa(chip->volume))) { + + chip->volume = alsa2chip(ucontrol->value.integer.value[0]); + changed = 1; + } + + } else if (kcontrol->private_value == PCM_PLAYBACK_MUTE) { + /* Now implemented */ + audio_info(" Mute attempted\n"); + changed = toggle_mute(chip, ucontrol->value.integer.value[0]); + + } else if (kcontrol->private_value == PCM_PLAYBACK_DEVICE) { + if (ucontrol->value.integer.value[0] != chip->dest) { + chip->dest = ucontrol->value.integer.value[0]; + changed = 1; + } + } + + if (changed) { + if (bcm2835_audio_set_ctls(chip)) + printk(KERN_ERR "Failed to set ALSA controls..\n"); + } + + return changed; +} + +static DECLARE_TLV_DB_SCALE(snd_bcm2835_db_scale, CTRL_VOL_MIN, 1, 1); + +static struct snd_kcontrol_new snd_bcm2835_ctl[] = { + { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "PCM Playback Volume", + .index = 0, + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, + .private_value = PCM_PLAYBACK_VOLUME, + .info = snd_bcm2835_ctl_info, + .get = snd_bcm2835_ctl_get, + .put = snd_bcm2835_ctl_put, + .count = 1, + .tlv = {.p = snd_bcm2835_db_scale} + }, + { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "PCM Playback Switch", + .index = 0, + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, + .private_value = PCM_PLAYBACK_MUTE, + .info = snd_bcm2835_ctl_info, + .get = snd_bcm2835_ctl_get, + .put = snd_bcm2835_ctl_put, + .count = 1, + }, + { + .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "PCM Playback Route", + .index = 0, + .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, + .private_value = PCM_PLAYBACK_DEVICE, + .info = snd_bcm2835_ctl_info, + .get = snd_bcm2835_ctl_get, + .put = snd_bcm2835_ctl_put, + .count = 1, + }, +}; + +int snd_bcm2835_new_ctl(bcm2835_chip_t * chip) +{ + int err; + unsigned int idx; + + strcpy(chip->card->mixername, "Broadcom Mixer"); + for (idx = 0; idx < ARRAY_SIZE(snd_bcm2835_ctl); idx++) { + err = + snd_ctl_add(chip->card, + snd_ctl_new1(&snd_bcm2835_ctl[idx], chip)); + if (err < 0) + return err; + } + return 0; +} --- /dev/null +++ b/sound/arm/bcm2835-pcm.c @@ -0,0 +1,409 @@ +/***************************************************************************** +* Copyright 2011 Broadcom Corporation. All rights reserved. +* +* Unless you and Broadcom execute a separate written software license +* agreement governing use of this software, this software is licensed to you +* under the terms of the GNU General Public License version 2, available at +* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). +* +* Notwithstanding the above, under no circumstances may you combine this +* software in any way with any other Broadcom software provided under a +* license other than the GPL, without Broadcom's express prior written +* consent. +*****************************************************************************/ + +#include +#include + +#include "bcm2835.h" + +/* hardware definition */ +static struct snd_pcm_hardware snd_bcm2835_playback_hw = { + .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER), + .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, + .rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000, + .rate_min = 8000, + .rate_max = 48000, + .channels_min = 1, + .channels_max = 2, + .buffer_bytes_max = 128 * 1024, + .period_bytes_min = 1 * 1024, + .period_bytes_max = 128 * 1024, + .periods_min = 1, + .periods_max = 128, +}; + +static void snd_bcm2835_playback_free(struct snd_pcm_runtime *runtime) +{ + audio_info("Freeing up alsa stream here ..\n"); + if (runtime->private_data) + kfree(runtime->private_data); + runtime->private_data = NULL; +} + +static irqreturn_t bcm2835_playback_fifo_irq(int irq, void *dev_id) +{ + bcm2835_alsa_stream_t *alsa_stream = (bcm2835_alsa_stream_t *) dev_id; + uint32_t consumed = 0; + int new_period = 0; + + audio_info(" .. IN\n"); + + audio_info("alsa_stream=%p substream=%p\n", alsa_stream, + alsa_stream ? alsa_stream->substream : 0); + + if (alsa_stream->open) + consumed = bcm2835_audio_retrieve_buffers(alsa_stream); + + /* We get called only if playback was triggered, So, the number of buffers we retrieve in + * each iteration are the buffers that have been played out already + */ + + if (alsa_stream->period_size) { + if ((alsa_stream->pos / alsa_stream->period_size) != + ((alsa_stream->pos + consumed) / alsa_stream->period_size)) + new_period = 1; + } + audio_debug("updating pos cur: %d + %d max:%d period_bytes:%d, hw_ptr: %d new_period:%d\n", + alsa_stream->pos, + consumed, + alsa_stream->buffer_size, + (int)(alsa_stream->period_size*alsa_stream->substream->runtime->periods), + frames_to_bytes(alsa_stream->substream->runtime, alsa_stream->substream->runtime->status->hw_ptr), + new_period); + if (alsa_stream->buffer_size) { + alsa_stream->pos += consumed &~ (1<<30); + alsa_stream->pos %= alsa_stream->buffer_size; + } + + if (alsa_stream->substream) { + if (new_period) + snd_pcm_period_elapsed(alsa_stream->substream); + } else { + audio_warning(" unexpected NULL substream\n"); + } + audio_info(" .. OUT\n"); + + return IRQ_HANDLED; +} + +/* open callback */ +static int snd_bcm2835_playback_open(struct snd_pcm_substream *substream) +{ + bcm2835_chip_t *chip = snd_pcm_substream_chip(substream); + struct snd_pcm_runtime *runtime = substream->runtime; + bcm2835_alsa_stream_t *alsa_stream; + int idx; + int err; + + audio_info(" .. IN (%d)\n", substream->number); + + audio_info("Alsa open (%d)\n", substream->number); + idx = substream->number; + + if (idx > MAX_SUBSTREAMS) { + audio_error + ("substream(%d) device doesn't exist max(%d) substreams allowed\n", + idx, MAX_SUBSTREAMS); + err = -ENODEV; + goto out; + } + + /* Check if we are ready */ + if (!(chip->avail_substreams & (1 << idx))) { + /* We are not ready yet */ + audio_error("substream(%d) device is not ready yet\n", idx); + err = -EAGAIN; + goto out; + } + + alsa_stream = kzalloc(sizeof(bcm2835_alsa_stream_t), GFP_KERNEL); + if (alsa_stream == NULL) { + return -ENOMEM; + } + + /* Initialise alsa_stream */ + alsa_stream->chip = chip; + alsa_stream->substream = substream; + alsa_stream->idx = idx; + chip->alsa_stream[idx] = alsa_stream; + + sema_init(&alsa_stream->buffers_update_sem, 0); + sema_init(&alsa_stream->control_sem, 0); + spin_lock_init(&alsa_stream->lock); + + /* Enabled in start trigger, called on each "fifo irq" after that */ + alsa_stream->enable_fifo_irq = 0; + alsa_stream->fifo_irq_handler = bcm2835_playback_fifo_irq; + + runtime->private_data = alsa_stream; + runtime->private_free = snd_bcm2835_playback_free; + runtime->hw = snd_bcm2835_playback_hw; + /* minimum 16 bytes alignment (for vchiq bulk transfers) */ + snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, + 16); + + err = bcm2835_audio_open(alsa_stream); + if (err != 0) { + kfree(alsa_stream); + return err; + } + + alsa_stream->open = 1; + alsa_stream->draining = 1; + +out: + audio_info(" .. OUT =%d\n", err); + + return err; +} + +/* close callback */ +static int snd_bcm2835_playback_close(struct snd_pcm_substream *substream) +{ + /* the hardware-specific codes will be here */ + + struct snd_pcm_runtime *runtime = substream->runtime; + bcm2835_alsa_stream_t *alsa_stream = runtime->private_data; + + audio_info(" .. IN\n"); + audio_info("Alsa close\n"); + + /* + * Call stop if it's still running. This happens when app + * is force killed and we don't get a stop trigger. + */ + if (alsa_stream->running) { + int err; + err = bcm2835_audio_stop(alsa_stream); + alsa_stream->running = 0; + if (err != 0) + audio_error(" Failed to STOP alsa device\n"); + } + + alsa_stream->period_size = 0; + alsa_stream->buffer_size = 0; + + if (alsa_stream->open) { + alsa_stream->open = 0; + bcm2835_audio_close(alsa_stream); + } + if (alsa_stream->chip) + alsa_stream->chip->alsa_stream[alsa_stream->idx] = NULL; + /* + * Do not free up alsa_stream here, it will be freed up by + * runtime->private_free callback we registered in *_open above + */ + + audio_info(" .. OUT\n"); + + return 0; +} + +/* hw_params callback */ +static int snd_bcm2835_pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + int err; + struct snd_pcm_runtime *runtime = substream->runtime; + bcm2835_alsa_stream_t *alsa_stream = + (bcm2835_alsa_stream_t *) runtime->private_data; + + audio_info(" .. IN\n"); + + err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); + if (err < 0) { + audio_error + (" pcm_lib_malloc failed to allocated pages for buffers\n"); + return err; + } + + err = bcm2835_audio_set_params(alsa_stream, params_channels(params), + params_rate(params), + snd_pcm_format_width(params_format + (params))); + if (err < 0) { + audio_error(" error setting hw params\n"); + } + + bcm2835_audio_setup(alsa_stream); + + /* in preparation of the stream, set the controls (volume level) of the stream */ + bcm2835_audio_set_ctls(alsa_stream->chip); + + audio_info(" .. OUT\n"); + + return err; +} + +/* hw_free callback */ +static int snd_bcm2835_pcm_hw_free(struct snd_pcm_substream *substream) +{ + audio_info(" .. IN\n"); + return snd_pcm_lib_free_pages(substream); +} + +/* prepare callback */ +static int snd_bcm2835_pcm_prepare(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + bcm2835_alsa_stream_t *alsa_stream = runtime->private_data; + + audio_info(" .. IN\n"); + + alsa_stream->buffer_size = snd_pcm_lib_buffer_bytes(substream); + alsa_stream->period_size = snd_pcm_lib_period_bytes(substream); + alsa_stream->pos = 0; + + audio_debug("buffer_size=%d, period_size=%d pos=%d frame_bits=%d\n", + alsa_stream->buffer_size, alsa_stream->period_size, + alsa_stream->pos, runtime->frame_bits); + + audio_info(" .. OUT\n"); + return 0; +} + +/* trigger callback */ +static int snd_bcm2835_pcm_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + bcm2835_alsa_stream_t *alsa_stream = runtime->private_data; + int err = 0; + + audio_info(" .. IN\n"); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + audio_debug("bcm2835_AUDIO_TRIGGER_START running=%d\n", + alsa_stream->running); + if (!alsa_stream->running) { + err = bcm2835_audio_start(alsa_stream); + if (err == 0) { + alsa_stream->running = 1; + alsa_stream->draining = 1; + } else { + audio_error(" Failed to START alsa device (%d)\n", err); + } + } + break; + case SNDRV_PCM_TRIGGER_STOP: + audio_debug + ("bcm2835_AUDIO_TRIGGER_STOP running=%d draining=%d\n", + alsa_stream->running, runtime->status->state == SNDRV_PCM_STATE_DRAINING); + if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { + audio_info("DRAINING\n"); + alsa_stream->draining = 1; + } else { + audio_info("DROPPING\n"); + alsa_stream->draining = 0; + } + if (alsa_stream->running) { + err = bcm2835_audio_stop(alsa_stream); + if (err != 0) + audio_error(" Failed to STOP alsa device (%d)\n", err); + alsa_stream->running = 0; + } + break; + default: + err = -EINVAL; + } + + audio_info(" .. OUT\n"); + return err; +} + +/* pointer callback */ +static snd_pcm_uframes_t +snd_bcm2835_pcm_pointer(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + bcm2835_alsa_stream_t *alsa_stream = runtime->private_data; + + audio_info(" .. IN\n"); + + audio_debug("pcm_pointer... (%d) hwptr=%d appl=%d pos=%d\n", 0, + frames_to_bytes(runtime, runtime->status->hw_ptr), + frames_to_bytes(runtime, runtime->control->appl_ptr), + alsa_stream->pos); + + audio_info(" .. OUT\n"); + return bytes_to_frames(runtime, alsa_stream->pos); +} + +static int snd_bcm2835_pcm_copy(struct snd_pcm_substream *substream, + int channel, snd_pcm_uframes_t pos, void *src, + snd_pcm_uframes_t count) +{ + int ret; + struct snd_pcm_runtime *runtime = substream->runtime; + bcm2835_alsa_stream_t *alsa_stream = runtime->private_data; + + audio_info(" .. IN\n"); + audio_debug("copy.......... (%d) hwptr=%d appl=%d pos=%d\n", + frames_to_bytes(runtime, count), frames_to_bytes(runtime, + runtime-> + status-> + hw_ptr), + frames_to_bytes(runtime, runtime->control->appl_ptr), + alsa_stream->pos); + ret = + bcm2835_audio_write(alsa_stream, frames_to_bytes(runtime, count), + src); + audio_info(" .. OUT\n"); + return ret; +} + +static int snd_bcm2835_pcm_lib_ioctl(struct snd_pcm_substream *substream, + unsigned int cmd, void *arg) +{ + int ret = snd_pcm_lib_ioctl(substream, cmd, arg); + audio_info(" .. substream=%p, cmd=%d, arg=%p (%x) ret=%d\n", substream, + cmd, arg, arg ? *(unsigned *)arg : 0, ret); + return ret; +} + +/* operators */ +static struct snd_pcm_ops snd_bcm2835_playback_ops = { + .open = snd_bcm2835_playback_open, + .close = snd_bcm2835_playback_close, + .ioctl = snd_bcm2835_pcm_lib_ioctl, + .hw_params = snd_bcm2835_pcm_hw_params, + .hw_free = snd_bcm2835_pcm_hw_free, + .prepare = snd_bcm2835_pcm_prepare, + .trigger = snd_bcm2835_pcm_trigger, + .pointer = snd_bcm2835_pcm_pointer, + .copy = snd_bcm2835_pcm_copy, +}; + +/* create a pcm device */ +int snd_bcm2835_new_pcm(bcm2835_chip_t * chip) +{ + struct snd_pcm *pcm; + int err; + + audio_info(" .. IN\n"); + err = + snd_pcm_new(chip->card, "bcm2835 ALSA", 0, MAX_SUBSTREAMS, 0, &pcm); + if (err < 0) + return err; + pcm->private_data = chip; + strcpy(pcm->name, "bcm2835 ALSA"); + chip->pcm = pcm; + chip->dest = AUDIO_DEST_AUTO; + chip->volume = alsa2chip(0); + chip->mute = CTRL_VOL_UNMUTE; /*disable mute on startup */ + /* set operators */ + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, + &snd_bcm2835_playback_ops); + + /* pre-allocation of buffers */ + /* NOTE: this may fail */ + snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, + snd_dma_continuous_data + (GFP_KERNEL), 64 * 1024, + 64 * 1024); + + audio_info(" .. OUT\n"); + + return 0; +} --- /dev/null +++ b/sound/arm/bcm2835-vchiq.c @@ -0,0 +1,844 @@ +/***************************************************************************** +* Copyright 2011 Broadcom Corporation. All rights reserved. +* +* Unless you and Broadcom execute a separate written software license +* agreement governing use of this software, this software is licensed to you +* under the terms of the GNU General Public License version 2, available at +* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). +* +* Notwithstanding the above, under no circumstances may you combine this +* software in any way with any other Broadcom software provided under a +* license other than the GPL, without Broadcom's express prior written +* consent. +*****************************************************************************/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "bcm2835.h" + +/* ---- Include Files -------------------------------------------------------- */ + +#include "interface/vchi/vchi.h" +#include "vc_vchi_audioserv_defs.h" + +/* ---- Private Constants and Types ------------------------------------------ */ + +/* Logging macros (for remapping to other logging mechanisms, i.e., printf) */ +#ifdef AUDIO_DEBUG_ENABLE + #define LOG_ERR( fmt, arg... ) pr_err( "%s:%d " fmt, __func__, __LINE__, ##arg) + #define LOG_WARN( fmt, arg... ) pr_info( "%s:%d " fmt, __func__, __LINE__, ##arg) + #define LOG_INFO( fmt, arg... ) pr_info( "%s:%d " fmt, __func__, __LINE__, ##arg) + #define LOG_DBG( fmt, arg... ) pr_info( "%s:%d " fmt, __func__, __LINE__, ##arg) +#else + #define LOG_ERR( fmt, arg... ) pr_err( "%s:%d " fmt, __func__, __LINE__, ##arg) + #define LOG_WARN( fmt, arg... ) + #define LOG_INFO( fmt, arg... ) + #define LOG_DBG( fmt, arg... ) +#endif + +typedef struct opaque_AUDIO_INSTANCE_T { + uint32_t num_connections; + VCHI_SERVICE_HANDLE_T vchi_handle[VCHI_MAX_NUM_CONNECTIONS]; + struct semaphore msg_avail_event; + struct mutex vchi_mutex; + bcm2835_alsa_stream_t *alsa_stream; + int32_t result; + short peer_version; +} AUDIO_INSTANCE_T; + +bool force_bulk = false; + +/* ---- Private Variables ---------------------------------------------------- */ + +/* ---- Private Function Prototypes ------------------------------------------ */ + +/* ---- Private Functions ---------------------------------------------------- */ + +static int bcm2835_audio_stop_worker(bcm2835_alsa_stream_t * alsa_stream); +static int bcm2835_audio_start_worker(bcm2835_alsa_stream_t * alsa_stream); + +typedef struct { + struct work_struct my_work; + bcm2835_alsa_stream_t *alsa_stream; + int x; +} my_work_t; + +static void my_wq_function(struct work_struct *work) +{ + my_work_t *w = (my_work_t *) work; + int ret = -9; + LOG_DBG(" .. IN %p:%d\n", w->alsa_stream, w->x); + switch (w->x) { + case 1: + ret = bcm2835_audio_start_worker(w->alsa_stream); + break; + case 2: + ret = bcm2835_audio_stop_worker(w->alsa_stream); + break; + default: + LOG_ERR(" Unexpected work: %p:%d\n", w->alsa_stream, w->x); + break; + } + kfree((void *)work); + LOG_DBG(" .. OUT %d\n", ret); +} + +int bcm2835_audio_start(bcm2835_alsa_stream_t * alsa_stream) +{ + int ret = -1; + LOG_DBG(" .. IN\n"); + if (alsa_stream->my_wq) { + my_work_t *work = kmalloc(sizeof(my_work_t), GFP_ATOMIC); + /*--- Queue some work (item 1) ---*/ + if (work) { + INIT_WORK((struct work_struct *)work, my_wq_function); + work->alsa_stream = alsa_stream; + work->x = 1; + if (queue_work + (alsa_stream->my_wq, (struct work_struct *)work)) + ret = 0; + } else + LOG_ERR(" .. Error: NULL work kmalloc\n"); + } + LOG_DBG(" .. OUT %d\n", ret); + return ret; +} + +int bcm2835_audio_stop(bcm2835_alsa_stream_t * alsa_stream) +{ + int ret = -1; + LOG_DBG(" .. IN\n"); + if (alsa_stream->my_wq) { + my_work_t *work = kmalloc(sizeof(my_work_t), GFP_ATOMIC); + /*--- Queue some work (item 1) ---*/ + if (work) { + INIT_WORK((struct work_struct *)work, my_wq_function); + work->alsa_stream = alsa_stream; + work->x = 2; + if (queue_work + (alsa_stream->my_wq, (struct work_struct *)work)) + ret = 0; + } else + LOG_ERR(" .. Error: NULL work kmalloc\n"); + } + LOG_DBG(" .. OUT %d\n", ret); + return ret; +} + +void my_workqueue_init(bcm2835_alsa_stream_t * alsa_stream) +{ + alsa_stream->my_wq = create_workqueue("my_queue"); + return; +} + +void my_workqueue_quit(bcm2835_alsa_stream_t * alsa_stream) +{ + if (alsa_stream->my_wq) { + flush_workqueue(alsa_stream->my_wq); + destroy_workqueue(alsa_stream->my_wq); + alsa_stream->my_wq = NULL; + } + return; +} + +static void audio_vchi_callback(void *param, + const VCHI_CALLBACK_REASON_T reason, + void *msg_handle) +{ + AUDIO_INSTANCE_T *instance = (AUDIO_INSTANCE_T *) param; + int32_t status; + int32_t msg_len; + VC_AUDIO_MSG_T m; + bcm2835_alsa_stream_t *alsa_stream = 0; + LOG_DBG(" .. IN instance=%p, param=%p, reason=%d, handle=%p\n", + instance, param, reason, msg_handle); + + if (!instance || reason != VCHI_CALLBACK_MSG_AVAILABLE) { + return; + } + alsa_stream = instance->alsa_stream; + status = vchi_msg_dequeue(instance->vchi_handle[0], + &m, sizeof m, &msg_len, VCHI_FLAGS_NONE); + if (m.type == VC_AUDIO_MSG_TYPE_RESULT) { + LOG_DBG + (" .. instance=%p, m.type=VC_AUDIO_MSG_TYPE_RESULT, success=%d\n", + instance, m.u.result.success); + instance->result = m.u.result.success; + up(&instance->msg_avail_event); + } else if (m.type == VC_AUDIO_MSG_TYPE_COMPLETE) { + irq_handler_t callback = (irq_handler_t) m.u.complete.callback; + LOG_DBG + (" .. instance=%p, m.type=VC_AUDIO_MSG_TYPE_COMPLETE, complete=%d\n", + instance, m.u.complete.count); + if (alsa_stream && callback) { + atomic_add(m.u.complete.count, &alsa_stream->retrieved); + callback(0, alsa_stream); + } else { + LOG_DBG(" .. unexpected alsa_stream=%p, callback=%p\n", + alsa_stream, callback); + } + } else { + LOG_DBG(" .. unexpected m.type=%d\n", m.type); + } + LOG_DBG(" .. OUT\n"); +} + +static AUDIO_INSTANCE_T *vc_vchi_audio_init(VCHI_INSTANCE_T vchi_instance, + VCHI_CONNECTION_T ** + vchi_connections, + uint32_t num_connections) +{ + uint32_t i; + AUDIO_INSTANCE_T *instance; + int status; + + LOG_DBG("%s: start", __func__); + + if (num_connections > VCHI_MAX_NUM_CONNECTIONS) { + LOG_ERR("%s: unsupported number of connections %u (max=%u)\n", + __func__, num_connections, VCHI_MAX_NUM_CONNECTIONS); + + return NULL; + } + /* Allocate memory for this instance */ + instance = kmalloc(sizeof(*instance), GFP_KERNEL); + + memset(instance, 0, sizeof(*instance)); + instance->num_connections = num_connections; + + /* Create a lock for exclusive, serialized VCHI connection access */ + mutex_init(&instance->vchi_mutex); + /* Open the VCHI service connections */ + for (i = 0; i < num_connections; i++) { + SERVICE_CREATION_T params = { + VCHI_VERSION_EX(VC_AUDIOSERV_VER, VC_AUDIOSERV_MIN_VER), + VC_AUDIO_SERVER_NAME, // 4cc service code + vchi_connections[i], // passed in fn pointers + 0, // rx fifo size (unused) + 0, // tx fifo size (unused) + audio_vchi_callback, // service callback + instance, // service callback parameter + 1, //TODO: remove VCOS_FALSE, // unaligned bulk recieves + 1, //TODO: remove VCOS_FALSE, // unaligned bulk transmits + 0 // want crc check on bulk transfers + }; + + status = vchi_service_open(vchi_instance, ¶ms, + &instance->vchi_handle[i]); + if (status) { + LOG_ERR + ("%s: failed to open VCHI service connection (status=%d)\n", + __func__, status); + + goto err_close_services; + } + /* Finished with the service for now */ + vchi_service_release(instance->vchi_handle[i]); + } + + return instance; + +err_close_services: + for (i = 0; i < instance->num_connections; i++) { + vchi_service_close(instance->vchi_handle[i]); + } + + kfree(instance); + + return NULL; +} + +static int32_t vc_vchi_audio_deinit(AUDIO_INSTANCE_T * instance) +{ + uint32_t i; + + LOG_DBG(" .. IN\n"); + + if (instance == NULL) { + LOG_ERR("%s: invalid handle %p\n", __func__, instance); + + return -1; + } + + LOG_DBG(" .. about to lock (%d)\n", instance->num_connections); + if(mutex_lock_interruptible(&instance->vchi_mutex)) + { + LOG_DBG("Interrupted whilst waiting for lock on (%d)\n",instance->num_connections); + return -EINTR; + } + + /* Close all VCHI service connections */ + for (i = 0; i < instance->num_connections; i++) { + int32_t success; + LOG_DBG(" .. %i:closing %p\n", i, instance->vchi_handle[i]); + vchi_service_use(instance->vchi_handle[i]); + + success = vchi_service_close(instance->vchi_handle[i]); + if (success != 0) { + LOG_ERR + ("%s: failed to close VCHI service connection (status=%d)\n", + __func__, success); + } + } + + mutex_unlock(&instance->vchi_mutex); + + kfree(instance); + + LOG_DBG(" .. OUT\n"); + + return 0; +} + +static int bcm2835_audio_open_connection(bcm2835_alsa_stream_t * alsa_stream) +{ + static VCHI_INSTANCE_T vchi_instance; + static VCHI_CONNECTION_T *vchi_connection; + AUDIO_INSTANCE_T *instance = alsa_stream->instance; + int ret; + LOG_DBG(" .. IN\n"); + + LOG_INFO("%s: start", __func__); + //BUG_ON(instance); + if (instance) { + LOG_ERR("%s: VCHI instance already open (%p)\n", + __func__, instance); + instance->alsa_stream = alsa_stream; + alsa_stream->instance = instance; + ret = 0; // xxx todo -1; + goto err_free_mem; + } + + /* Initialize and create a VCHI connection */ + ret = vchi_initialise(&vchi_instance); + if (ret != 0) { + LOG_ERR("%s: failed to initialise VCHI instance (ret=%d)\n", + __func__, ret); + + ret = -EIO; + goto err_free_mem; + } + ret = vchi_connect(NULL, 0, vchi_instance); + if (ret != 0) { + LOG_ERR("%s: failed to connect VCHI instance (ret=%d)\n", + __func__, ret); + + ret = -EIO; + goto err_free_mem; + } + + /* Initialize an instance of the audio service */ + instance = vc_vchi_audio_init(vchi_instance, &vchi_connection, 1); + + if (instance == NULL /*|| audio_handle != instance */ ) { + LOG_ERR("%s: failed to initialize audio service\n", __func__); + + ret = -EPERM; + goto err_free_mem; + } + + instance->alsa_stream = alsa_stream; + alsa_stream->instance = instance; + + LOG_DBG(" success !\n"); +err_free_mem: + LOG_DBG(" .. OUT\n"); + + return ret; +} + +int bcm2835_audio_open(bcm2835_alsa_stream_t * alsa_stream) +{ + AUDIO_INSTANCE_T *instance; + VC_AUDIO_MSG_T m; + int32_t success; + int ret; + LOG_DBG(" .. IN\n"); + + my_workqueue_init(alsa_stream); + + ret = bcm2835_audio_open_connection(alsa_stream); + if (ret != 0) { + ret = -1; + goto exit; + } + instance = alsa_stream->instance; + + if(mutex_lock_interruptible(&instance->vchi_mutex)) + { + LOG_DBG("Interrupted whilst waiting for lock on (%d)\n",instance->num_connections); + return -EINTR; + } + vchi_service_use(instance->vchi_handle[0]); + + m.type = VC_AUDIO_MSG_TYPE_OPEN; + + /* Send the message to the videocore */ + success = vchi_msg_queue(instance->vchi_handle[0], + &m, sizeof m, + VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL); + + if (success != 0) { + LOG_ERR("%s: failed on vchi_msg_queue (status=%d)\n", + __func__, success); + + ret = -1; + goto unlock; + } + + ret = 0; + +unlock: + vchi_service_release(instance->vchi_handle[0]); + mutex_unlock(&instance->vchi_mutex); +exit: + LOG_DBG(" .. OUT\n"); + return ret; +} + +static int bcm2835_audio_set_ctls_chan(bcm2835_alsa_stream_t * alsa_stream, + bcm2835_chip_t * chip) +{ + VC_AUDIO_MSG_T m; + AUDIO_INSTANCE_T *instance = alsa_stream->instance; + int32_t success; + int ret; + LOG_DBG(" .. IN\n"); + + LOG_INFO + (" Setting ALSA dest(%d), volume(%d)\n", chip->dest, chip->volume); + + if(mutex_lock_interruptible(&instance->vchi_mutex)) + { + LOG_DBG("Interrupted whilst waiting for lock on (%d)\n",instance->num_connections); + return -EINTR; + } + vchi_service_use(instance->vchi_handle[0]); + + instance->result = -1; + + m.type = VC_AUDIO_MSG_TYPE_CONTROL; + m.u.control.dest = chip->dest; + m.u.control.volume = chip->volume; + + /* Create the message available event */ + sema_init(&instance->msg_avail_event, 0); + + /* Send the message to the videocore */ + success = vchi_msg_queue(instance->vchi_handle[0], + &m, sizeof m, + VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL); + + if (success != 0) { + LOG_ERR("%s: failed on vchi_msg_queue (status=%d)\n", + __func__, success); + + ret = -1; + goto unlock; + } + + /* We are expecting a reply from the videocore */ + if (down_interruptible(&instance->msg_avail_event)) { + LOG_ERR("%s: failed on waiting for event (status=%d)\n", + __func__, success); + + ret = -1; + goto unlock; + } + + if (instance->result != 0) { + LOG_ERR("%s: result=%d\n", __func__, instance->result); + + ret = -1; + goto unlock; + } + + ret = 0; + +unlock: + vchi_service_release(instance->vchi_handle[0]); + mutex_unlock(&instance->vchi_mutex); + + LOG_DBG(" .. OUT\n"); + return ret; +} + +int bcm2835_audio_set_ctls(bcm2835_chip_t * chip) +{ + int i; + int ret = 0; + LOG_DBG(" .. IN\n"); + + /* change ctls for all substreams */ + for (i = 0; i < MAX_SUBSTREAMS; i++) { + if (chip->avail_substreams & (1 << i)) { + if (!chip->alsa_stream[i]) + { + LOG_DBG(" No ALSA stream available?! %i:%p (%x)\n", i, chip->alsa_stream[i], chip->avail_substreams); + ret = 0; + } + else if (bcm2835_audio_set_ctls_chan /* returns 0 on success */ + (chip->alsa_stream[i], chip) != 0) + { + LOG_DBG("Couldn't set the controls for stream %d\n", i); + ret = -1; + } + else LOG_DBG(" Controls set for stream %d\n", i); + } + } + LOG_DBG(" .. OUT ret=%d\n", ret); + return ret; +} + +int bcm2835_audio_set_params(bcm2835_alsa_stream_t * alsa_stream, + uint32_t channels, uint32_t samplerate, + uint32_t bps) +{ + VC_AUDIO_MSG_T m; + AUDIO_INSTANCE_T *instance = alsa_stream->instance; + int32_t success; + int ret; + LOG_DBG(" .. IN\n"); + + LOG_INFO + (" Setting ALSA channels(%d), samplerate(%d), bits-per-sample(%d)\n", + channels, samplerate, bps); + + /* resend ctls - alsa_stream may not have been open when first send */ + ret = bcm2835_audio_set_ctls_chan(alsa_stream, alsa_stream->chip); + if (ret != 0) { + LOG_ERR(" Alsa controls not supported\n"); + return -EINVAL; + } + + if(mutex_lock_interruptible(&instance->vchi_mutex)) + { + LOG_DBG("Interrupted whilst waiting for lock on (%d)\n",instance->num_connections); + return -EINTR; + } + vchi_service_use(instance->vchi_handle[0]); + + instance->result = -1; + + m.type = VC_AUDIO_MSG_TYPE_CONFIG; + m.u.config.channels = channels; + m.u.config.samplerate = samplerate; + m.u.config.bps = bps; + + /* Create the message available event */ + sema_init(&instance->msg_avail_event, 0); + + /* Send the message to the videocore */ + success = vchi_msg_queue(instance->vchi_handle[0], + &m, sizeof m, + VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL); + + if (success != 0) { + LOG_ERR("%s: failed on vchi_msg_queue (status=%d)\n", + __func__, success); + + ret = -1; + goto unlock; + } + + /* We are expecting a reply from the videocore */ + if (down_interruptible(&instance->msg_avail_event)) { + LOG_ERR("%s: failed on waiting for event (status=%d)\n", + __func__, success); + + ret = -1; + goto unlock; + } + + if (instance->result != 0) { + LOG_ERR("%s: result=%d", __func__, instance->result); + + ret = -1; + goto unlock; + } + + ret = 0; + +unlock: + vchi_service_release(instance->vchi_handle[0]); + mutex_unlock(&instance->vchi_mutex); + + LOG_DBG(" .. OUT\n"); + return ret; +} + +int bcm2835_audio_setup(bcm2835_alsa_stream_t * alsa_stream) +{ + LOG_DBG(" .. IN\n"); + + LOG_DBG(" .. OUT\n"); + + return 0; +} + +static int bcm2835_audio_start_worker(bcm2835_alsa_stream_t * alsa_stream) +{ + VC_AUDIO_MSG_T m; + AUDIO_INSTANCE_T *instance = alsa_stream->instance; + int32_t success; + int ret; + LOG_DBG(" .. IN\n"); + + if(mutex_lock_interruptible(&instance->vchi_mutex)) + { + LOG_DBG("Interrupted whilst waiting for lock on (%d)\n",instance->num_connections); + return -EINTR; + } + vchi_service_use(instance->vchi_handle[0]); + + m.type = VC_AUDIO_MSG_TYPE_START; + + /* Send the message to the videocore */ + success = vchi_msg_queue(instance->vchi_handle[0], + &m, sizeof m, + VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL); + + if (success != 0) { + LOG_ERR("%s: failed on vchi_msg_queue (status=%d)", + __func__, success); + + ret = -1; + goto unlock; + } + + ret = 0; + +unlock: + vchi_service_release(instance->vchi_handle[0]); + mutex_unlock(&instance->vchi_mutex); + LOG_DBG(" .. OUT\n"); + return ret; +} + +static int bcm2835_audio_stop_worker(bcm2835_alsa_stream_t * alsa_stream) +{ + VC_AUDIO_MSG_T m; + AUDIO_INSTANCE_T *instance = alsa_stream->instance; + int32_t success; + int ret; + LOG_DBG(" .. IN\n"); + + if(mutex_lock_interruptible(&instance->vchi_mutex)) + { + LOG_DBG("Interrupted whilst waiting for lock on (%d)\n",instance->num_connections); + return -EINTR; + } + vchi_service_use(instance->vchi_handle[0]); + + m.type = VC_AUDIO_MSG_TYPE_STOP; + m.u.stop.draining = alsa_stream->draining; + + /* Send the message to the videocore */ + success = vchi_msg_queue(instance->vchi_handle[0], + &m, sizeof m, + VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL); + + if (success != 0) { + LOG_ERR("%s: failed on vchi_msg_queue (status=%d)", + __func__, success); + + ret = -1; + goto unlock; + } + + ret = 0; + +unlock: + vchi_service_release(instance->vchi_handle[0]); + mutex_unlock(&instance->vchi_mutex); + LOG_DBG(" .. OUT\n"); + return ret; +} + +int bcm2835_audio_close(bcm2835_alsa_stream_t * alsa_stream) +{ + VC_AUDIO_MSG_T m; + AUDIO_INSTANCE_T *instance = alsa_stream->instance; + int32_t success; + int ret; + LOG_DBG(" .. IN\n"); + + my_workqueue_quit(alsa_stream); + + if(mutex_lock_interruptible(&instance->vchi_mutex)) + { + LOG_DBG("Interrupted whilst waiting for lock on (%d)\n",instance->num_connections); + return -EINTR; + } + vchi_service_use(instance->vchi_handle[0]); + + m.type = VC_AUDIO_MSG_TYPE_CLOSE; + + /* Create the message available event */ + sema_init(&instance->msg_avail_event, 0); + + /* Send the message to the videocore */ + success = vchi_msg_queue(instance->vchi_handle[0], + &m, sizeof m, + VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL); + + if (success != 0) { + LOG_ERR("%s: failed on vchi_msg_queue (status=%d)", + __func__, success); + ret = -1; + goto unlock; + } + if (down_interruptible(&instance->msg_avail_event)) { + LOG_ERR("%s: failed on waiting for event (status=%d)", + __func__, success); + + ret = -1; + goto unlock; + } + if (instance->result != 0) { + LOG_ERR("%s: failed result (status=%d)", + __func__, instance->result); + + ret = -1; + goto unlock; + } + + ret = 0; + +unlock: + vchi_service_release(instance->vchi_handle[0]); + mutex_unlock(&instance->vchi_mutex); + + /* Stop the audio service */ + if (instance) { + vc_vchi_audio_deinit(instance); + alsa_stream->instance = NULL; + } + LOG_DBG(" .. OUT\n"); + return ret; +} + +int bcm2835_audio_write(bcm2835_alsa_stream_t * alsa_stream, uint32_t count, + void *src) +{ + VC_AUDIO_MSG_T m; + AUDIO_INSTANCE_T *instance = alsa_stream->instance; + int32_t success; + int ret; + + LOG_DBG(" .. IN\n"); + + LOG_INFO(" Writing %d bytes from %p\n", count, src); + + if(mutex_lock_interruptible(&instance->vchi_mutex)) + { + LOG_DBG("Interrupted whilst waiting for lock on (%d)\n",instance->num_connections); + return -EINTR; + } + vchi_service_use(instance->vchi_handle[0]); + + if ( instance->peer_version==0 && vchi_get_peer_version(instance->vchi_handle[0], &instance->peer_version) == 0 ) { + LOG_DBG("%s: client version %d connected\n", __func__, instance->peer_version); + } + m.type = VC_AUDIO_MSG_TYPE_WRITE; + m.u.write.count = count; + // old version uses bulk, new version uses control + m.u.write.max_packet = instance->peer_version < 2 || force_bulk ? 0:4000; + m.u.write.callback = alsa_stream->fifo_irq_handler; + m.u.write.cookie = alsa_stream; + m.u.write.silence = src == NULL; + + /* Send the message to the videocore */ + success = vchi_msg_queue(instance->vchi_handle[0], + &m, sizeof m, + VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL); + + if (success != 0) { + LOG_ERR("%s: failed on vchi_msg_queue (status=%d)", + __func__, success); + + ret = -1; + goto unlock; + } + if (!m.u.write.silence) { + if (m.u.write.max_packet == 0) { + /* Send the message to the videocore */ + success = vchi_bulk_queue_transmit(instance->vchi_handle[0], + src, count, + 0 * + VCHI_FLAGS_BLOCK_UNTIL_QUEUED + + + 1 * + VCHI_FLAGS_BLOCK_UNTIL_DATA_READ, + NULL); + } else { + while (count > 0) { + int bytes = min((int)m.u.write.max_packet, (int)count); + success = vchi_msg_queue(instance->vchi_handle[0], + src, bytes, + VCHI_FLAGS_BLOCK_UNTIL_QUEUED, NULL); + src = (char *)src + bytes; + count -= bytes; + } + } + if (success != 0) { + LOG_ERR + ("%s: failed on vchi_bulk_queue_transmit (status=%d)", + __func__, success); + + ret = -1; + goto unlock; + } + } + ret = 0; + +unlock: + vchi_service_release(instance->vchi_handle[0]); + mutex_unlock(&instance->vchi_mutex); + LOG_DBG(" .. OUT\n"); + return ret; +} + +/** + * Returns all buffers from arm->vc + */ +void bcm2835_audio_flush_buffers(bcm2835_alsa_stream_t * alsa_stream) +{ + LOG_DBG(" .. IN\n"); + LOG_DBG(" .. OUT\n"); + return; +} + +/** + * Forces VC to flush(drop) its filled playback buffers and + * return them the us. (VC->ARM) + */ +void bcm2835_audio_flush_playback_buffers(bcm2835_alsa_stream_t * alsa_stream) +{ + LOG_DBG(" .. IN\n"); + LOG_DBG(" .. OUT\n"); +} + +uint32_t bcm2835_audio_retrieve_buffers(bcm2835_alsa_stream_t * alsa_stream) +{ + uint32_t count = atomic_read(&alsa_stream->retrieved); + atomic_sub(count, &alsa_stream->retrieved); + return count; +} + +module_param(force_bulk, bool, 0444); +MODULE_PARM_DESC(force_bulk, "Force use of vchiq bulk for audio"); --- /dev/null +++ b/sound/arm/bcm2835.c @@ -0,0 +1,413 @@ +/***************************************************************************** +* Copyright 2011 Broadcom Corporation. All rights reserved. +* +* Unless you and Broadcom execute a separate written software license +* agreement governing use of this software, this software is licensed to you +* under the terms of the GNU General Public License version 2, available at +* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). +* +* Notwithstanding the above, under no circumstances may you combine this +* software in any way with any other Broadcom software provided under a +* license other than the GPL, without Broadcom's express prior written +* consent. +*****************************************************************************/ + +#include + +#include +#include +#include + +#include "bcm2835.h" + +/* module parameters (see "Module Parameters") */ +/* SNDRV_CARDS: maximum number of cards supported by this module */ +static int index[MAX_SUBSTREAMS] = {[0 ... (MAX_SUBSTREAMS - 1)] = -1 }; +static char *id[MAX_SUBSTREAMS] = {[0 ... (MAX_SUBSTREAMS - 1)] = NULL }; +static int enable[MAX_SUBSTREAMS] = {[0 ... (MAX_SUBSTREAMS - 1)] = 1 }; + +/* HACKY global pointers needed for successive probes to work : ssp + * But compared against the changes we will have to do in VC audio_ipc code + * to export 8 audio_ipc devices as a single IPC device and then monitor all + * four devices in a thread, this gets things done quickly and should be easier + * to debug if we run into issues + */ + +static struct snd_card *g_card = NULL; +static bcm2835_chip_t *g_chip = NULL; + +static int snd_bcm2835_free(bcm2835_chip_t * chip) +{ + kfree(chip); + return 0; +} + +/* component-destructor + * (see "Management of Cards and Components") + */ +static int snd_bcm2835_dev_free(struct snd_device *device) +{ + return snd_bcm2835_free(device->device_data); +} + +/* chip-specific constructor + * (see "Management of Cards and Components") + */ +static int snd_bcm2835_create(struct snd_card *card, + struct platform_device *pdev, + bcm2835_chip_t ** rchip) +{ + bcm2835_chip_t *chip; + int err; + static struct snd_device_ops ops = { + .dev_free = snd_bcm2835_dev_free, + }; + + *rchip = NULL; + + chip = kzalloc(sizeof(*chip), GFP_KERNEL); + if (chip == NULL) + return -ENOMEM; + + chip->card = card; + + err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); + if (err < 0) { + snd_bcm2835_free(chip); + return err; + } + + *rchip = chip; + return 0; +} + +static int snd_bcm2835_alsa_probe(struct platform_device *pdev) +{ + static int dev; + bcm2835_chip_t *chip; + struct snd_card *card; + int err; + + if (dev >= MAX_SUBSTREAMS) + return -ENODEV; + + if (!enable[dev]) { + dev++; + return -ENOENT; + } + + if (dev > 0) + goto add_register_map; + + err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &g_card); + if (err < 0) + goto out; + + snd_card_set_dev(g_card, &pdev->dev); + strcpy(g_card->driver, "BRCM bcm2835 ALSA Driver"); + strcpy(g_card->shortname, "bcm2835 ALSA"); + sprintf(g_card->longname, "%s", g_card->shortname); + + err = snd_bcm2835_create(g_card, pdev, &chip); + if (err < 0) { + printk(KERN_ERR "Failed to create bcm2835 chip\n"); + goto out_bcm2835_create; + } + + g_chip = chip; + err = snd_bcm2835_new_pcm(chip); + if (err < 0) { + printk(KERN_ERR "Failed to create new BCM2835 pcm device\n"); + goto out_bcm2835_new_pcm; + } + + err = snd_bcm2835_new_ctl(chip); + if (err < 0) { + printk(KERN_ERR "Failed to create new BCM2835 ctl\n"); + goto out_bcm2835_new_ctl; + } + +add_register_map: + card = g_card; + chip = g_chip; + + BUG_ON(!(card && chip)); + + chip->avail_substreams |= (1 << dev); + chip->pdev[dev] = pdev; + + if (dev == 0) { + err = snd_card_register(card); + if (err < 0) { + printk(KERN_ERR + "Failed to register bcm2835 ALSA card \n"); + goto out_card_register; + } + platform_set_drvdata(pdev, card); + printk(KERN_INFO "bcm2835 ALSA card created!\n"); + } else { + printk(KERN_INFO "bcm2835 ALSA chip created!\n"); + platform_set_drvdata(pdev, (void *)dev); + } + + dev++; + + return 0; + +out_card_register: +out_bcm2835_new_ctl: +out_bcm2835_new_pcm: +out_bcm2835_create: + BUG_ON(!g_card); + if (snd_card_free(g_card)) + printk(KERN_ERR "Failed to free Registered alsa card\n"); + g_card = NULL; +out: + dev = SNDRV_CARDS; /* stop more avail_substreams from being probed */ + printk(KERN_ERR "BCM2835 ALSA Probe failed !!\n"); + return err; +} + +static int snd_bcm2835_alsa_remove(struct platform_device *pdev) +{ + uint32_t idx; + void *drv_data; + + drv_data = platform_get_drvdata(pdev); + + if (drv_data == (void *)g_card) { + /* This is the card device */ + snd_card_free((struct snd_card *)drv_data); + g_card = NULL; + g_chip = NULL; + } else { + idx = (uint32_t) drv_data; + if (g_card != NULL) { + BUG_ON(!g_chip); + /* We pass chip device numbers in audio ipc devices + * other than the one we registered our card with + */ + idx = (uint32_t) drv_data; + BUG_ON(!idx || idx > MAX_SUBSTREAMS); + g_chip->avail_substreams &= ~(1 << idx); + /* There should be atleast one substream registered + * after we are done here, as it wil be removed when + * the *remove* is called for the card device + */ + BUG_ON(!g_chip->avail_substreams); + } + } + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +#ifdef CONFIG_PM +static int snd_bcm2835_alsa_suspend(struct platform_device *pdev, + pm_message_t state) +{ + return 0; +} + +static int snd_bcm2835_alsa_resume(struct platform_device *pdev) +{ + return 0; +} + +#endif + +static struct platform_driver bcm2835_alsa0_driver = { + .probe = snd_bcm2835_alsa_probe, + .remove = snd_bcm2835_alsa_remove, +#ifdef CONFIG_PM + .suspend = snd_bcm2835_alsa_suspend, + .resume = snd_bcm2835_alsa_resume, +#endif + .driver = { + .name = "bcm2835_AUD0", + .owner = THIS_MODULE, + }, +}; + +static struct platform_driver bcm2835_alsa1_driver = { + .probe = snd_bcm2835_alsa_probe, + .remove = snd_bcm2835_alsa_remove, +#ifdef CONFIG_PM + .suspend = snd_bcm2835_alsa_suspend, + .resume = snd_bcm2835_alsa_resume, +#endif + .driver = { + .name = "bcm2835_AUD1", + .owner = THIS_MODULE, + }, +}; + +static struct platform_driver bcm2835_alsa2_driver = { + .probe = snd_bcm2835_alsa_probe, + .remove = snd_bcm2835_alsa_remove, +#ifdef CONFIG_PM + .suspend = snd_bcm2835_alsa_suspend, + .resume = snd_bcm2835_alsa_resume, +#endif + .driver = { + .name = "bcm2835_AUD2", + .owner = THIS_MODULE, + }, +}; + +static struct platform_driver bcm2835_alsa3_driver = { + .probe = snd_bcm2835_alsa_probe, + .remove = snd_bcm2835_alsa_remove, +#ifdef CONFIG_PM + .suspend = snd_bcm2835_alsa_suspend, + .resume = snd_bcm2835_alsa_resume, +#endif + .driver = { + .name = "bcm2835_AUD3", + .owner = THIS_MODULE, + }, +}; + +static struct platform_driver bcm2835_alsa4_driver = { + .probe = snd_bcm2835_alsa_probe, + .remove = snd_bcm2835_alsa_remove, +#ifdef CONFIG_PM + .suspend = snd_bcm2835_alsa_suspend, + .resume = snd_bcm2835_alsa_resume, +#endif + .driver = { + .name = "bcm2835_AUD4", + .owner = THIS_MODULE, + }, +}; + +static struct platform_driver bcm2835_alsa5_driver = { + .probe = snd_bcm2835_alsa_probe, + .remove = snd_bcm2835_alsa_remove, +#ifdef CONFIG_PM + .suspend = snd_bcm2835_alsa_suspend, + .resume = snd_bcm2835_alsa_resume, +#endif + .driver = { + .name = "bcm2835_AUD5", + .owner = THIS_MODULE, + }, +}; + +static struct platform_driver bcm2835_alsa6_driver = { + .probe = snd_bcm2835_alsa_probe, + .remove = snd_bcm2835_alsa_remove, +#ifdef CONFIG_PM + .suspend = snd_bcm2835_alsa_suspend, + .resume = snd_bcm2835_alsa_resume, +#endif + .driver = { + .name = "bcm2835_AUD6", + .owner = THIS_MODULE, + }, +}; + +static struct platform_driver bcm2835_alsa7_driver = { + .probe = snd_bcm2835_alsa_probe, + .remove = snd_bcm2835_alsa_remove, +#ifdef CONFIG_PM + .suspend = snd_bcm2835_alsa_suspend, + .resume = snd_bcm2835_alsa_resume, +#endif + .driver = { + .name = "bcm2835_AUD7", + .owner = THIS_MODULE, + }, +}; + +static int bcm2835_alsa_device_init(void) +{ + int err; + err = platform_driver_register(&bcm2835_alsa0_driver); + if (err) { + printk("Error registering bcm2835_alsa0_driver %d .\n", err); + goto out; + } + + err = platform_driver_register(&bcm2835_alsa1_driver); + if (err) { + printk("Error registering bcm2835_alsa1_driver %d .\n", err); + goto unregister_0; + } + + err = platform_driver_register(&bcm2835_alsa2_driver); + if (err) { + printk("Error registering bcm2835_alsa2_driver %d .\n", err); + goto unregister_1; + } + + err = platform_driver_register(&bcm2835_alsa3_driver); + if (err) { + printk("Error registering bcm2835_alsa3_driver %d .\n", err); + goto unregister_2; + } + + err = platform_driver_register(&bcm2835_alsa4_driver); + if (err) { + printk("Error registering bcm2835_alsa4_driver %d .\n", err); + goto unregister_3; + } + + err = platform_driver_register(&bcm2835_alsa5_driver); + if (err) { + printk("Error registering bcm2835_alsa5_driver %d .\n", err); + goto unregister_4; + } + + err = platform_driver_register(&bcm2835_alsa6_driver); + if (err) { + printk("Error registering bcm2835_alsa6_driver %d .\n", err); + goto unregister_5; + } + + err = platform_driver_register(&bcm2835_alsa7_driver); + if (err) { + printk("Error registering bcm2835_alsa7_driver %d .\n", err); + goto unregister_6; + } + + return 0; + +unregister_6: + platform_driver_unregister(&bcm2835_alsa6_driver); +unregister_5: + platform_driver_unregister(&bcm2835_alsa5_driver); +unregister_4: + platform_driver_unregister(&bcm2835_alsa4_driver); +unregister_3: + platform_driver_unregister(&bcm2835_alsa3_driver); +unregister_2: + platform_driver_unregister(&bcm2835_alsa2_driver); +unregister_1: + platform_driver_unregister(&bcm2835_alsa1_driver); +unregister_0: + platform_driver_unregister(&bcm2835_alsa0_driver); +out: + return err; +} + +static void bcm2835_alsa_device_exit(void) +{ + platform_driver_unregister(&bcm2835_alsa0_driver); + platform_driver_unregister(&bcm2835_alsa1_driver); + platform_driver_unregister(&bcm2835_alsa2_driver); + platform_driver_unregister(&bcm2835_alsa3_driver); + platform_driver_unregister(&bcm2835_alsa4_driver); + platform_driver_unregister(&bcm2835_alsa5_driver); + platform_driver_unregister(&bcm2835_alsa6_driver); + platform_driver_unregister(&bcm2835_alsa7_driver); +} + +late_initcall(bcm2835_alsa_device_init); +module_exit(bcm2835_alsa_device_exit); + +MODULE_AUTHOR("Dom Cobley"); +MODULE_DESCRIPTION("Alsa driver for BCM2835 chip"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:bcm2835_alsa"); --- /dev/null +++ b/sound/arm/bcm2835.h @@ -0,0 +1,155 @@ +/***************************************************************************** +* Copyright 2011 Broadcom Corporation. All rights reserved. +* +* Unless you and Broadcom execute a separate written software license +* agreement governing use of this software, this software is licensed to you +* under the terms of the GNU General Public License version 2, available at +* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). +* +* Notwithstanding the above, under no circumstances may you combine this +* software in any way with any other Broadcom software provided under a +* license other than the GPL, without Broadcom's express prior written +* consent. +*****************************************************************************/ + +#ifndef __SOUND_ARM_BCM2835_H +#define __SOUND_ARM_BCM2835_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* +#define AUDIO_DEBUG_ENABLE +#define AUDIO_VERBOSE_DEBUG_ENABLE +*/ + +/* Debug macros */ + +#ifdef AUDIO_DEBUG_ENABLE +#ifdef AUDIO_VERBOSE_DEBUG_ENABLE + +#define audio_debug(fmt, arg...) \ + printk(KERN_INFO"%s:%d " fmt, __func__, __LINE__, ##arg) + +#define audio_info(fmt, arg...) \ + printk(KERN_INFO"%s:%d " fmt, __func__, __LINE__, ##arg) + +#else + +#define audio_debug(fmt, arg...) + +#define audio_info(fmt, arg...) + +#endif /* AUDIO_VERBOSE_DEBUG_ENABLE */ + +#else + +#define audio_debug(fmt, arg...) + +#define audio_info(fmt, arg...) + +#endif /* AUDIO_DEBUG_ENABLE */ + +#define audio_error(fmt, arg...) \ + printk(KERN_ERR"%s:%d " fmt, __func__, __LINE__, ##arg) + +#define audio_warning(fmt, arg...) \ + printk(KERN_WARNING"%s:%d " fmt, __func__, __LINE__, ##arg) + +#define audio_alert(fmt, arg...) \ + printk(KERN_ALERT"%s:%d " fmt, __func__, __LINE__, ##arg) + +#define MAX_SUBSTREAMS (8) +#define AVAIL_SUBSTREAMS_MASK (0xff) +enum { + CTRL_VOL_MUTE, + CTRL_VOL_UNMUTE +}; + +/* macros for alsa2chip and chip2alsa, instead of functions */ + +#define alsa2chip(vol) (uint)(-((vol << 8) / 100)) /* convert alsa to chip volume (defined as macro rather than function call) */ +#define chip2alsa(vol) -((vol * 100) >> 8) /* convert chip to alsa volume */ + +/* Some constants for values .. */ +typedef enum { + AUDIO_DEST_AUTO = 0, + AUDIO_DEST_HEADPHONES = 1, + AUDIO_DEST_HDMI = 2, + AUDIO_DEST_MAX, +} SND_BCM2835_ROUTE_T; + +typedef enum { + PCM_PLAYBACK_VOLUME, + PCM_PLAYBACK_MUTE, + PCM_PLAYBACK_DEVICE, +} SND_BCM2835_CTRL_T; + +/* definition of the chip-specific record */ +typedef struct bcm2835_chip { + struct snd_card *card; + struct snd_pcm *pcm; + /* Bitmat for valid reg_base and irq numbers */ + uint32_t avail_substreams; + struct platform_device *pdev[MAX_SUBSTREAMS]; + struct bcm2835_alsa_stream *alsa_stream[MAX_SUBSTREAMS]; + + int volume; + int old_volume; /* stores the volume value whist muted */ + int dest; + int mute; +} bcm2835_chip_t; + +typedef struct bcm2835_alsa_stream { + bcm2835_chip_t *chip; + struct snd_pcm_substream *substream; + + struct semaphore buffers_update_sem; + struct semaphore control_sem; + spinlock_t lock; + volatile uint32_t control; + volatile uint32_t status; + + int open; + int running; + int draining; + + unsigned int pos; + unsigned int buffer_size; + unsigned int period_size; + + uint32_t enable_fifo_irq; + irq_handler_t fifo_irq_handler; + + atomic_t retrieved; + struct opaque_AUDIO_INSTANCE_T *instance; + struct workqueue_struct *my_wq; + int idx; +} bcm2835_alsa_stream_t; + +int snd_bcm2835_new_ctl(bcm2835_chip_t * chip); +int snd_bcm2835_new_pcm(bcm2835_chip_t * chip); + +int bcm2835_audio_open(bcm2835_alsa_stream_t * alsa_stream); +int bcm2835_audio_close(bcm2835_alsa_stream_t * alsa_stream); +int bcm2835_audio_set_params(bcm2835_alsa_stream_t * alsa_stream, + uint32_t channels, uint32_t samplerate, + uint32_t bps); +int bcm2835_audio_setup(bcm2835_alsa_stream_t * alsa_stream); +int bcm2835_audio_start(bcm2835_alsa_stream_t * alsa_stream); +int bcm2835_audio_stop(bcm2835_alsa_stream_t * alsa_stream); +int bcm2835_audio_set_ctls(bcm2835_chip_t * chip); +int bcm2835_audio_write(bcm2835_alsa_stream_t * alsa_stream, uint32_t count, + void *src); +uint32_t bcm2835_audio_retrieve_buffers(bcm2835_alsa_stream_t * alsa_stream); +void bcm2835_audio_flush_buffers(bcm2835_alsa_stream_t * alsa_stream); +void bcm2835_audio_flush_playback_buffers(bcm2835_alsa_stream_t * alsa_stream); + +#endif /* __SOUND_ARM_BCM2835_H */ --- /dev/null +++ b/sound/arm/vc_vchi_audioserv_defs.h @@ -0,0 +1,116 @@ +/***************************************************************************** +* Copyright 2011 Broadcom Corporation. All rights reserved. +* +* Unless you and Broadcom execute a separate written software license +* agreement governing use of this software, this software is licensed to you +* under the terms of the GNU General Public License version 2, available at +* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). +* +* Notwithstanding the above, under no circumstances may you combine this +* software in any way with any other Broadcom software provided under a +* license other than the GPL, without Broadcom's express prior written +* consent. +*****************************************************************************/ + +#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, // Generic result + VC_AUDIO_MSG_TYPE_CONFIG, // Configure audio + VC_AUDIO_MSG_TYPE_CONTROL, // Configure audio + VC_AUDIO_MSG_TYPE_OPEN, // Configure audio + VC_AUDIO_MSG_TYPE_CLOSE, // Configure audio + VC_AUDIO_MSG_TYPE_START, // Configure audio + VC_AUDIO_MSG_TYPE_STOP, // Configure audio + VC_AUDIO_MSG_TYPE_WRITE, // Configure audio + VC_AUDIO_MSG_TYPE_MAX +} VC_AUDIO_MSG_TYPE; + +// 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; + +// audio +typedef struct { + uint32_t dummy; + +} VC_AUDIO_OPEN_T; + +// audio +typedef struct { + uint32_t dummy; + +} VC_AUDIO_CLOSE_T; +// audio +typedef struct { + uint32_t dummy; + +} VC_AUDIO_START_T; +// audio +typedef struct { + uint32_t draining; + +} VC_AUDIO_STOP_T; + +// configure the write audio samples +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_