This interface is designed for mixer/control application. To use hwdep interface, the application can get information about firewire node, can lock/unlock kernel streaming and can get notification at starting/stopping kernel streaming.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- include/uapi/sound/asound.h | 3 +- include/uapi/sound/firewire.h | 3 +- sound/firewire/Kconfig | 1 + sound/firewire/fireworks/Makefile | 2 +- sound/firewire/fireworks/fireworks.c | 5 + sound/firewire/fireworks/fireworks.h | 12 ++ sound/firewire/fireworks/fireworks_hwdep.c | 199 ++++++++++++++++++++++++++++ sound/firewire/fireworks/fireworks_midi.c | 25 +++- sound/firewire/fireworks/fireworks_pcm.c | 15 ++- sound/firewire/fireworks/fireworks_stream.c | 39 ++++++ 10 files changed, 296 insertions(+), 8 deletions(-) create mode 100644 sound/firewire/fireworks/fireworks_hwdep.c
diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h index 9fc6219..5dfbfdf 100644 --- a/include/uapi/sound/asound.h +++ b/include/uapi/sound/asound.h @@ -94,9 +94,10 @@ enum { SNDRV_HWDEP_IFACE_HDA, /* HD-audio */ SNDRV_HWDEP_IFACE_USB_STREAM, /* direct access to usb stream */ SNDRV_HWDEP_IFACE_FW_DICE, /* TC DICE FireWire device */ + SNDRV_HWDEP_IFACE_FW_FIREWORKS, /* Echo Audio Fireworks based device */
/* Don't forget to change the following: */ - SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_FW_DICE + SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_FW_FIREWORKS };
struct snd_hwdep_info { diff --git a/include/uapi/sound/firewire.h b/include/uapi/sound/firewire.h index 59f5961..fc9afb2 100644 --- a/include/uapi/sound/firewire.h +++ b/include/uapi/sound/firewire.h @@ -34,7 +34,8 @@ union snd_firewire_event { #define SNDRV_FIREWIRE_IOCTL_UNLOCK _IO('H', 0xfa)
#define SNDRV_FIREWIRE_TYPE_DICE 1 -/* Fireworks, AV/C, RME, MOTU, ... */ +#define SNDRV_FIREWIRE_TYPE_FIREWORKS 2 +/* AV/C, RME, MOTU, ... */
struct snd_firewire_get_info { unsigned int type; /* SNDRV_FIREWIRE_TYPE_xxx */ diff --git a/sound/firewire/Kconfig b/sound/firewire/Kconfig index fb39f9c..875af02 100644 --- a/sound/firewire/Kconfig +++ b/sound/firewire/Kconfig @@ -66,6 +66,7 @@ config SND_FIREWORKS select SND_FIREWIRE_LIB select SND_RAWMIDI select SND_PCM + select SND_HWDEP help Say Y here to include support for FireWire devices based on Echo Digital Audio Fireworks board: diff --git a/sound/firewire/fireworks/Makefile b/sound/firewire/fireworks/Makefile index d7ebf83..0c74408 100644 --- a/sound/firewire/fireworks/Makefile +++ b/sound/firewire/fireworks/Makefile @@ -1,4 +1,4 @@ snd-fireworks-objs := fireworks_transaction.o fireworks_command.o \ fireworks_stream.o fireworks_proc.o fireworks_midi.o \ - fireworks_pcm.o fireworks.o + fireworks_pcm.o fireworks_hwdep.o fireworks.o obj-m += snd-fireworks.o diff --git a/sound/firewire/fireworks/fireworks.c b/sound/firewire/fireworks/fireworks.c index d7877c7..f8d06f5 100644 --- a/sound/firewire/fireworks/fireworks.c +++ b/sound/firewire/fireworks/fireworks.c @@ -217,6 +217,7 @@ efw_probe(struct fw_unit *unit, efw->unit = unit; mutex_init(&efw->mutex); spin_lock_init(&efw->lock); + init_waitqueue_head(&efw->hwdep_wait);
err = get_hardware_info(efw); if (err < 0) @@ -236,6 +237,10 @@ efw_probe(struct fw_unit *unit, if (err < 0) goto error;
+ err = snd_efw_create_hwdep_device(efw); + if (err < 0) + goto error; + err = snd_efw_stream_init_duplex(efw); if (err < 0) goto error; diff --git a/sound/firewire/fireworks/fireworks.h b/sound/firewire/fireworks/fireworks.h index 36419ca..4aaf2dc 100644 --- a/sound/firewire/fireworks/fireworks.h +++ b/sound/firewire/fireworks/fireworks.h @@ -24,6 +24,8 @@ #include <sound/info.h> #include <sound/rawmidi.h> #include <sound/pcm_params.h> +#include <sound/firewire.h> +#include <sound/hwdep.h>
#include "../packets-buffer.h" #include "../iso-resources.h" @@ -90,6 +92,11 @@ struct snd_efw { unsigned int phys_in_grp_count; struct snd_efw_phys_grp phys_out_grps[HWINFO_MAX_CAPS_GROUPS]; struct snd_efw_phys_grp phys_in_grps[HWINFO_MAX_CAPS_GROUPS]; + + /* for uapi */ + int dev_lock_count; + bool dev_lock_changed; + wait_queue_head_t hwdep_wait; };
struct snd_efw_transaction { @@ -197,6 +204,9 @@ int snd_efw_stream_start_duplex(struct snd_efw *efw, int sampling_rate); void snd_efw_stream_stop_duplex(struct snd_efw *efw); void snd_efw_stream_update_duplex(struct snd_efw *efw); void snd_efw_stream_destroy_duplex(struct snd_efw *efw); +void snd_efw_stream_lock_changed(struct snd_efw *efw); +int snd_efw_stream_lock_try(struct snd_efw *efw); +void snd_efw_stream_lock_release(struct snd_efw *efw);
void snd_efw_proc_init(struct snd_efw *efw);
@@ -205,6 +215,8 @@ int snd_efw_create_midi_devices(struct snd_efw *efw); int snd_efw_create_pcm_devices(struct snd_efw *efw); int snd_efw_get_multiplier_mode(unsigned int sampling_rate, unsigned int *mode);
+int snd_efw_create_hwdep_device(struct snd_efw *efw); + #define SND_EFW_DEV_ENTRY(vendor, model) \ { \ .match_flags = IEEE1394_MATCH_VENDOR_ID | \ diff --git a/sound/firewire/fireworks/fireworks_hwdep.c b/sound/firewire/fireworks/fireworks_hwdep.c new file mode 100644 index 0000000..1cf491d --- /dev/null +++ b/sound/firewire/fireworks/fireworks_hwdep.c @@ -0,0 +1,199 @@ +/* + * fireworks_hwdep.c - a part of driver for Fireworks based devices + * + * Copyright (c) 2013-2014 Takashi Sakamoto + * + * Licensed under the terms of the GNU General Public License, version 2. + */ + +/* + * This codes have three functionalities. + * + * 1.get information about firewire node + * 2.get notification about starting/stopping stream + * 3.lock/unlock streaming + */ + +#include "fireworks.h" + +static long +hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count, + loff_t *offset) +{ + struct snd_efw *efw = hwdep->private_data; + DEFINE_WAIT(wait); + union snd_firewire_event event; + + spin_lock_irq(&efw->lock); + + while (!efw->dev_lock_changed) { + prepare_to_wait(&efw->hwdep_wait, &wait, TASK_INTERRUPTIBLE); + spin_unlock_irq(&efw->lock); + schedule(); + finish_wait(&efw->hwdep_wait, &wait); + if (signal_pending(current)) + return -ERESTARTSYS; + spin_lock_irq(&efw->lock); + } + + memset(&event, 0, sizeof(event)); + if (efw->dev_lock_changed) { + event.lock_status.type = SNDRV_FIREWIRE_EVENT_LOCK_STATUS; + event.lock_status.status = (efw->dev_lock_count > 0); + efw->dev_lock_changed = false; + + count = min_t(long, count, sizeof(event.lock_status)); + } + + spin_unlock_irq(&efw->lock); + + if (copy_to_user(buf, &event, count)) + return -EFAULT; + + return count; +} + +static unsigned int +hwdep_poll(struct snd_hwdep *hwdep, struct file *file, poll_table *wait) +{ + struct snd_efw *efw = hwdep->private_data; + unsigned int events; + + poll_wait(file, &efw->hwdep_wait, wait); + + spin_lock_irq(&efw->lock); + if (efw->dev_lock_changed) + events = POLLIN | POLLRDNORM; + else + events = 0; + spin_unlock_irq(&efw->lock); + + return events; +} + +static int +hwdep_get_info(struct snd_efw *efw, void __user *arg) +{ + struct fw_device *dev = fw_parent_device(efw->unit); + struct snd_firewire_get_info info; + + memset(&info, 0, sizeof(info)); + info.type = SNDRV_FIREWIRE_TYPE_FIREWORKS; + info.card = dev->card->index; + *(__be32 *)&info.guid[0] = cpu_to_be32(dev->config_rom[3]); + *(__be32 *)&info.guid[4] = cpu_to_be32(dev->config_rom[4]); + strlcpy(info.device_name, dev_name(&dev->device), + sizeof(info.device_name)); + + if (copy_to_user(arg, &info, sizeof(info))) + return -EFAULT; + + return 0; +} + +static int +hwdep_lock(struct snd_efw *efw) +{ + int err; + + spin_lock_irq(&efw->lock); + + if (efw->dev_lock_count == 0) { + efw->dev_lock_count = -1; + err = 0; + } else { + err = -EBUSY; + } + + spin_unlock_irq(&efw->lock); + + return err; +} + +static int +hwdep_unlock(struct snd_efw *efw) +{ + int err; + + spin_lock_irq(&efw->lock); + + if (efw->dev_lock_count == -1) { + efw->dev_lock_count = 0; + err = 0; + } else { + err = -EBADFD; + } + + spin_unlock_irq(&efw->lock); + + return err; +} + +static int +hwdep_release(struct snd_hwdep *hwdep, struct file *file) +{ + struct snd_efw *efw = hwdep->private_data; + + spin_lock_irq(&efw->lock); + if (efw->dev_lock_count == -1) + efw->dev_lock_count = 0; + spin_unlock_irq(&efw->lock); + + return 0; +} + +static int +hwdep_ioctl(struct snd_hwdep *hwdep, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct snd_efw *efw = hwdep->private_data; + + switch (cmd) { + case SNDRV_FIREWIRE_IOCTL_GET_INFO: + return hwdep_get_info(efw, (void __user *)arg); + case SNDRV_FIREWIRE_IOCTL_LOCK: + return hwdep_lock(efw); + case SNDRV_FIREWIRE_IOCTL_UNLOCK: + return hwdep_unlock(efw); + default: + return -ENOIOCTLCMD; + } +} + +#ifdef CONFIG_COMPAT +static int +hwdep_compat_ioctl(struct snd_hwdep *hwdep, struct file *file, + unsigned int cmd, unsigned long arg) +{ + return hwdep_ioctl(hwdep, file, cmd, + (unsigned long)compat_ptr(arg)); +} +#else +#define hwdep_compat_ioctl NULL +#endif + +static const struct snd_hwdep_ops hwdep_ops = { + .read = hwdep_read, + .release = hwdep_release, + .poll = hwdep_poll, + .ioctl = hwdep_ioctl, + .ioctl_compat = hwdep_compat_ioctl, +}; + +int snd_efw_create_hwdep_device(struct snd_efw *efw) +{ + struct snd_hwdep *hwdep; + int err; + + err = snd_hwdep_new(efw->card, "Fireworks", 0, &hwdep); + if (err < 0) + goto end; + strcpy(hwdep->name, "Fireworks"); + hwdep->iface = SNDRV_HWDEP_IFACE_FW_FIREWORKS; + hwdep->ops = hwdep_ops; + hwdep->private_data = efw; + hwdep->exclusive = true; +end: + return err; +} + diff --git a/sound/firewire/fireworks/fireworks_midi.c b/sound/firewire/fireworks/fireworks_midi.c index cbf34e9..4a600d2 100644 --- a/sound/firewire/fireworks/fireworks_midi.c +++ b/sound/firewire/fireworks/fireworks_midi.c @@ -11,17 +11,36 @@ static int midi_capture_open(struct snd_rawmidi_substream *substream) { struct snd_efw *efw = substream->rmidi->private_data; + int err; + + err = snd_efw_stream_lock_try(efw); + if (err < 0) + goto end;
atomic_inc(&efw->capture_substreams); - return snd_efw_stream_start_duplex(efw, 0); + err = snd_efw_stream_start_duplex(efw, 0); + if (err < 0) + snd_efw_stream_lock_release(efw); + +end: + return err; }
static int midi_playback_open(struct snd_rawmidi_substream *substream) { struct snd_efw *efw = substream->rmidi->private_data; + int err; + + err = snd_efw_stream_lock_try(efw); + if (err < 0) + goto end;
atomic_inc(&efw->playback_substreams); - return snd_efw_stream_start_duplex(efw, 0); + err = snd_efw_stream_start_duplex(efw, 0); + if (err < 0) + snd_efw_stream_lock_release(efw); +end: + return err; }
static int midi_capture_close(struct snd_rawmidi_substream *substream) @@ -31,6 +50,7 @@ static int midi_capture_close(struct snd_rawmidi_substream *substream) atomic_dec(&efw->capture_substreams); snd_efw_stream_stop_duplex(efw);
+ snd_efw_stream_lock_release(efw); return 0; }
@@ -41,6 +61,7 @@ static int midi_playback_close(struct snd_rawmidi_substream *substream) atomic_dec(&efw->playback_substreams); snd_efw_stream_stop_duplex(efw);
+ snd_efw_stream_lock_release(efw); return 0; }
diff --git a/sound/firewire/fireworks/fireworks_pcm.c b/sound/firewire/fireworks/fireworks_pcm.c index 15ec4e0..ed211d0 100644 --- a/sound/firewire/fireworks/fireworks_pcm.c +++ b/sound/firewire/fireworks/fireworks_pcm.c @@ -199,13 +199,17 @@ static int pcm_open(struct snd_pcm_substream *substream) unsigned int clock_source; int err;
- err = pcm_init_hw_params(efw, substream); + err = snd_efw_stream_lock_try(efw); if (err < 0) goto end;
+ err = pcm_init_hw_params(efw, substream); + if (err < 0) + goto err_locked; + err = snd_efw_command_get_clock_source(efw, &clock_source); if (err < 0) - goto end; + goto err_locked;
/* * When source of clock is not internal or any PCM streams are running, @@ -216,7 +220,7 @@ static int pcm_open(struct snd_pcm_substream *substream) amdtp_stream_pcm_running(&efw->rx_stream)) { err = snd_efw_command_get_sampling_rate(efw, &sampling_rate); if (err < 0) - goto end; + goto err_locked; substream->runtime->hw.rate_min = sampling_rate; substream->runtime->hw.rate_max = sampling_rate; } @@ -224,10 +228,15 @@ static int pcm_open(struct snd_pcm_substream *substream) snd_pcm_set_sync(substream); end: return err; +err_locked: + snd_efw_stream_lock_release(efw); + return err; }
static int pcm_close(struct snd_pcm_substream *substream) { + struct snd_efw *efw = substream->private_data; + snd_efw_stream_lock_release(efw); return 0; }
diff --git a/sound/firewire/fireworks/fireworks_stream.c b/sound/firewire/fireworks/fireworks_stream.c index 1860914..eaab8f6 100644 --- a/sound/firewire/fireworks/fireworks_stream.c +++ b/sound/firewire/fireworks/fireworks_stream.c @@ -331,3 +331,42 @@ void snd_efw_stream_destroy_duplex(struct snd_efw *efw)
mutex_unlock(&efw->mutex); } + +void snd_efw_stream_lock_changed(struct snd_efw *efw) +{ + efw->dev_lock_changed = true; + wake_up(&efw->hwdep_wait); +} + +int snd_efw_stream_lock_try(struct snd_efw *efw) +{ + int err; + + spin_lock_irq(&efw->lock); + + /* user land lock this */ + if (efw->dev_lock_count < 0) { + err = -EBUSY; + goto end; + } + + /* this is the first time */ + if (efw->dev_lock_count++ == 0) + snd_efw_stream_lock_changed(efw); + err = 0; +end: + spin_unlock_irq(&efw->lock); + return err; +} + +void snd_efw_stream_lock_release(struct snd_efw *efw) +{ + spin_lock_irq(&efw->lock); + + if (WARN_ON(efw->dev_lock_count <= 0)) + goto end; + if (--efw->dev_lock_count == 0) + snd_efw_stream_lock_changed(efw); +end: + spin_unlock_irq(&efw->lock); +}