From patchwork Fri Feb 28 03:27:38 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Sakamoto X-Patchwork-Id: 3738271 X-Patchwork-Delegate: tiwai@suse.de Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D5CD99F2ED for ; Fri, 28 Feb 2014 03:45:10 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 8F8EB20266 for ; Fri, 28 Feb 2014 03:45:09 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id A89FE20255 for ; Fri, 28 Feb 2014 03:45:07 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id C4E4B265CCF; Fri, 28 Feb 2014 04:45:06 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [IPv6:::1]) by alsa0.perex.cz (Postfix) with ESMTP id BBDB0265A27; Fri, 28 Feb 2014 04:33:34 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id A46C2265A37; Fri, 28 Feb 2014 04:33:33 +0100 (CET) Received: from smtp311.phy.lolipop.jp (smtp311.phy.lolipop.jp [210.157.22.79]) by alsa0.perex.cz (Postfix) with ESMTP id E76922651AC for ; Fri, 28 Feb 2014 04:28:29 +0100 (CET) Received: from smtp311.phy.lolipop.lan (HELO smtp311.phy.lolipop.jp) (172.17.1.11) (smtp-auth username m12129643-o-takashi, mechanism plain) by smtp311.phy.lolipop.jp (qpsmtpd/0.82) with ESMTPA; Fri, 28 Feb 2014 12:28:29 +0900 Received: from 127.0.0.1 (127.0.0.1) by smtp311.phy.lolipop.jp (LOLIPOP-Fsecure); Fri, 28 Feb 2014 12:27:52 +0900 (JST) X-Virus-Status: clean(LOLIPOP-Fsecure) From: Takashi Sakamoto To: clemens@ladisch.de, tiwai@suse.de, perex@perex.cz Date: Fri, 28 Feb 2014 12:27:38 +0900 Message-Id: <1393558072-25926-26-git-send-email-o-takashi@sakamocchi.jp> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1393558072-25926-1-git-send-email-o-takashi@sakamocchi.jp> References: <1393558072-25926-1-git-send-email-o-takashi@sakamocchi.jp> Cc: alsa-devel@alsa-project.org, ffado-devel@lists.sf.net Subject: [alsa-devel] [PATCH 25/39] fireworks: Add hwdep interface X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- 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 | 197 ++++++++++++++++++++++++++++ sound/firewire/fireworks/fireworks_midi.c | 25 +++- sound/firewire/fireworks/fireworks_pcm.c | 15 ++- sound/firewire/fireworks/fireworks_stream.c | 39 ++++++ 10 files changed, 294 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 3034744..38986c0 100644 --- a/sound/firewire/fireworks/fireworks.c +++ b/sound/firewire/fireworks/fireworks.c @@ -190,6 +190,7 @@ efw_probe(struct fw_unit *unit, efw->card_index = -1; mutex_init(&efw->mutex); spin_lock_init(&efw->lock); + init_waitqueue_head(&efw->hwdep_wait); err = get_hardware_info(efw); if (err < 0) @@ -211,6 +212,10 @@ 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_card_register(card); if (err < 0) goto error; diff --git a/sound/firewire/fireworks/fireworks.h b/sound/firewire/fireworks/fireworks.h index 11d42cc..4ab4887 100644 --- a/sound/firewire/fireworks/fireworks.h +++ b/sound/firewire/fireworks/fireworks.h @@ -24,6 +24,8 @@ #include #include #include +#include +#include #include "../packets-buffer.h" #include "../iso-resources.h" @@ -76,6 +78,11 @@ 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 { @@ -188,6 +195,9 @@ int snd_efw_stream_start_duplex(struct snd_efw *efw, int 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); @@ -196,6 +206,8 @@ 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..4c28b6c --- /dev/null +++ b/sound/firewire/fireworks/fireworks_hwdep.c @@ -0,0 +1,197 @@ +/* + * fireworks_hwdep.c - a part of driver for Fireworks based devices + * + * Copyright (c) 2013 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 a950fd1..2924599 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; efw->capture_substreams++; - return snd_efw_stream_start_duplex(efw, &efw->tx_stream, 0); + err = snd_efw_stream_start_duplex(efw, &efw->tx_stream, 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; efw->playback_substreams++; - return snd_efw_stream_start_duplex(efw, &efw->rx_stream, 0); + err = snd_efw_stream_start_duplex(efw, &efw->rx_stream, 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) 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) 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 88c1d53..5ea33b9 100644 --- a/sound/firewire/fireworks/fireworks_pcm.c +++ b/sound/firewire/fireworks/fireworks_pcm.c @@ -273,13 +273,17 @@ 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, @@ -290,7 +294,7 @@ 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; } @@ -298,10 +302,15 @@ 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 7ff4406..b07ea1e 100644 --- a/sound/firewire/fireworks/fireworks_stream.c +++ b/sound/firewire/fireworks/fireworks_stream.c @@ -296,3 +296,42 @@ 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); +}