From patchwork Mon Dec 8 15:10:49 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Sakamoto X-Patchwork-Id: 5456951 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 281DEBEEA8 for ; Mon, 8 Dec 2014 15:18:53 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C230D201B4 for ; Mon, 8 Dec 2014 15:18:51 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id 004E62013D for ; Mon, 8 Dec 2014 15:18:49 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id 15B302654FB; Mon, 8 Dec 2014 16:18:49 +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 8892526163C; Mon, 8 Dec 2014 16:11:33 +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 525182612DF; Mon, 8 Dec 2014 16:11:21 +0100 (CET) Received: from smtp302.phy.lolipop.jp (smtp302.phy.lolipop.jp [210.157.22.85]) by alsa0.perex.cz (Postfix) with ESMTP id 689852612DF for ; Mon, 8 Dec 2014 16:11:02 +0100 (CET) Received: from smtp302.phy.lolipop.lan (HELO smtp302.phy.lolipop.jp) (172.17.1.85) (smtp-auth username m12129643-o-takashi, mechanism plain) by smtp302.phy.lolipop.jp (qpsmtpd/0.82) with ESMTPA; Tue, 09 Dec 2014 00:10:56 +0900 Received: from 127.0.0.1 (127.0.0.1) by smtp302.phy.lolipop.jp (LOLIPOP-Fsecure); Tue, 09 Dec 2014 00:10:49 +0900 (JST) X-Virus-Status: clean(LOLIPOP-Fsecure) From: Takashi Sakamoto To: clemens@ladisch.de, tiwai@suse.de Date: Tue, 9 Dec 2014 00:10:49 +0900 Message-Id: <1418051449-18371-16-git-send-email-o-takashi@sakamocchi.jp> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1418051449-18371-1-git-send-email-o-takashi@sakamocchi.jp> References: <1418051449-18371-1-git-send-email-o-takashi@sakamocchi.jp> Cc: alsa-devel@alsa-project.org, ffado-devel@lists.sourceforge.net Subject: [alsa-devel] [PATCH 15/15] ALSA: oxfw: 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. By using this interface, an 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/oxfw/Makefile | 2 +- sound/firewire/oxfw/oxfw-hwdep.c | 190 ++++++++++++++++++++++++++++++++++++++ sound/firewire/oxfw/oxfw-midi.c | 16 ++++ sound/firewire/oxfw/oxfw-pcm.c | 12 ++- sound/firewire/oxfw/oxfw-stream.c | 39 ++++++++ sound/firewire/oxfw/oxfw.c | 5 + sound/firewire/oxfw/oxfw.h | 13 +++ 10 files changed, 280 insertions(+), 4 deletions(-) create mode 100644 sound/firewire/oxfw/oxfw-hwdep.c diff --git a/include/uapi/sound/asound.h b/include/uapi/sound/asound.h index 941d32f..1f23cd6 100644 --- a/include/uapi/sound/asound.h +++ b/include/uapi/sound/asound.h @@ -96,9 +96,10 @@ enum { SNDRV_HWDEP_IFACE_FW_DICE, /* TC DICE FireWire device */ SNDRV_HWDEP_IFACE_FW_FIREWORKS, /* Echo Audio Fireworks based device */ SNDRV_HWDEP_IFACE_FW_BEBOB, /* BridgeCo BeBoB based device */ + SNDRV_HWDEP_IFACE_FW_OXFW, /* Oxford OXFW970/971 based device */ /* Don't forget to change the following: */ - SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_FW_BEBOB + SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_FW_OXFW }; struct snd_hwdep_info { diff --git a/include/uapi/sound/firewire.h b/include/uapi/sound/firewire.h index af4bd13..49122df 100644 --- a/include/uapi/sound/firewire.h +++ b/include/uapi/sound/firewire.h @@ -55,7 +55,8 @@ union snd_firewire_event { #define SNDRV_FIREWIRE_TYPE_DICE 1 #define SNDRV_FIREWIRE_TYPE_FIREWORKS 2 #define SNDRV_FIREWIRE_TYPE_BEBOB 3 -/* AV/C, RME, MOTU, ... */ +#define SNDRV_FIREWIRE_TYPE_OXFW 4 +/* 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 6364e5b..ecec547 100644 --- a/sound/firewire/Kconfig +++ b/sound/firewire/Kconfig @@ -26,6 +26,7 @@ config SND_DICE config SND_OXFW tristate "Oxford Semiconductor FW970/971 chipset support" select SND_FIREWIRE_LIB + select SND_HWDEP help Say Y here to include support for FireWire devices based on Oxford Semiconductor FW970/971 chipset. diff --git a/sound/firewire/oxfw/Makefile b/sound/firewire/oxfw/Makefile index 3904a30..a926850 100644 --- a/sound/firewire/oxfw/Makefile +++ b/sound/firewire/oxfw/Makefile @@ -1,3 +1,3 @@ snd-oxfw-objs := oxfw-command.o oxfw-stream.o oxfw-control.o oxfw-pcm.o \ - oxfw-proc.o oxfw-midi.o oxfw.o + oxfw-proc.o oxfw-midi.o oxfw-hwdep.o oxfw.o obj-m += snd-oxfw.o diff --git a/sound/firewire/oxfw/oxfw-hwdep.c b/sound/firewire/oxfw/oxfw-hwdep.c new file mode 100644 index 0000000..ff2687a --- /dev/null +++ b/sound/firewire/oxfw/oxfw-hwdep.c @@ -0,0 +1,190 @@ +/* + * oxfw_hwdep.c - a part of driver for OXFW970/971 based devices + * + * Copyright (c) 2014 Takashi Sakamoto + * + * Licensed under the terms of the GNU General Public License, version 2. + */ + +/* + * This codes give three functionality. + * + * 1.get firewire node information + * 2.get notification about starting/stopping stream + * 3.lock/unlock stream + */ + +#include "oxfw.h" + +static long hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count, + loff_t *offset) +{ + struct snd_oxfw *oxfw = hwdep->private_data; + DEFINE_WAIT(wait); + union snd_firewire_event event; + + spin_lock_irq(&oxfw->lock); + + while (!oxfw->dev_lock_changed) { + prepare_to_wait(&oxfw->hwdep_wait, &wait, TASK_INTERRUPTIBLE); + spin_unlock_irq(&oxfw->lock); + schedule(); + finish_wait(&oxfw->hwdep_wait, &wait); + if (signal_pending(current)) + return -ERESTARTSYS; + spin_lock_irq(&oxfw->lock); + } + + memset(&event, 0, sizeof(event)); + if (oxfw->dev_lock_changed) { + event.lock_status.type = SNDRV_FIREWIRE_EVENT_LOCK_STATUS; + event.lock_status.status = (oxfw->dev_lock_count > 0); + oxfw->dev_lock_changed = false; + + count = min_t(long, count, sizeof(event.lock_status)); + } + + spin_unlock_irq(&oxfw->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_oxfw *oxfw = hwdep->private_data; + unsigned int events; + + poll_wait(file, &oxfw->hwdep_wait, wait); + + spin_lock_irq(&oxfw->lock); + if (oxfw->dev_lock_changed) + events = POLLIN | POLLRDNORM; + else + events = 0; + spin_unlock_irq(&oxfw->lock); + + return events; +} + +static int hwdep_get_info(struct snd_oxfw *oxfw, void __user *arg) +{ + struct fw_device *dev = fw_parent_device(oxfw->unit); + struct snd_firewire_get_info info; + + memset(&info, 0, sizeof(info)); + info.type = SNDRV_FIREWIRE_TYPE_OXFW; + 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_oxfw *oxfw) +{ + int err; + + spin_lock_irq(&oxfw->lock); + + if (oxfw->dev_lock_count == 0) { + oxfw->dev_lock_count = -1; + err = 0; + } else { + err = -EBUSY; + } + + spin_unlock_irq(&oxfw->lock); + + return err; +} + +static int hwdep_unlock(struct snd_oxfw *oxfw) +{ + int err; + + spin_lock_irq(&oxfw->lock); + + if (oxfw->dev_lock_count == -1) { + oxfw->dev_lock_count = 0; + err = 0; + } else { + err = -EBADFD; + } + + spin_unlock_irq(&oxfw->lock); + + return err; +} + +static int hwdep_release(struct snd_hwdep *hwdep, struct file *file) +{ + struct snd_oxfw *oxfw = hwdep->private_data; + + spin_lock_irq(&oxfw->lock); + if (oxfw->dev_lock_count == -1) + oxfw->dev_lock_count = 0; + spin_unlock_irq(&oxfw->lock); + + return 0; +} + +static int hwdep_ioctl(struct snd_hwdep *hwdep, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct snd_oxfw *oxfw = hwdep->private_data; + + switch (cmd) { + case SNDRV_FIREWIRE_IOCTL_GET_INFO: + return hwdep_get_info(oxfw, (void __user *)arg); + case SNDRV_FIREWIRE_IOCTL_LOCK: + return hwdep_lock(oxfw); + case SNDRV_FIREWIRE_IOCTL_UNLOCK: + return hwdep_unlock(oxfw); + 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 + +int snd_oxfw_create_hwdep(struct snd_oxfw *oxfw) +{ + 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, + }; + struct snd_hwdep *hwdep; + int err; + + err = snd_hwdep_new(oxfw->card, oxfw->card->driver, 0, &hwdep); + if (err < 0) + goto end; + strcpy(hwdep->name, oxfw->card->driver); + hwdep->iface = SNDRV_HWDEP_IFACE_FW_OXFW; + hwdep->ops = hwdep_ops; + hwdep->private_data = oxfw; + hwdep->exclusive = true; +end: + return err; +} diff --git a/sound/firewire/oxfw/oxfw-midi.c b/sound/firewire/oxfw/oxfw-midi.c index 334b11d..540a303 100644 --- a/sound/firewire/oxfw/oxfw-midi.c +++ b/sound/firewire/oxfw/oxfw-midi.c @@ -13,6 +13,10 @@ static int midi_capture_open(struct snd_rawmidi_substream *substream) struct snd_oxfw *oxfw = substream->rmidi->private_data; int err; + err = snd_oxfw_stream_lock_try(oxfw); + if (err < 0) + return err; + mutex_lock(&oxfw->mutex); oxfw->capture_substreams++; @@ -20,6 +24,9 @@ static int midi_capture_open(struct snd_rawmidi_substream *substream) mutex_unlock(&oxfw->mutex); + if (err < 0) + snd_oxfw_stream_lock_release(oxfw); + return err; } @@ -28,6 +35,10 @@ static int midi_playback_open(struct snd_rawmidi_substream *substream) struct snd_oxfw *oxfw = substream->rmidi->private_data; int err; + err = snd_oxfw_stream_lock_try(oxfw); + if (err < 0) + return err; + mutex_lock(&oxfw->mutex); oxfw->playback_substreams++; @@ -35,6 +46,9 @@ static int midi_playback_open(struct snd_rawmidi_substream *substream) mutex_unlock(&oxfw->mutex); + if (err < 0) + snd_oxfw_stream_lock_release(oxfw); + return err; } @@ -49,6 +63,7 @@ static int midi_capture_close(struct snd_rawmidi_substream *substream) mutex_unlock(&oxfw->mutex); + snd_oxfw_stream_lock_release(oxfw); return 0; } @@ -63,6 +78,7 @@ static int midi_playback_close(struct snd_rawmidi_substream *substream) mutex_unlock(&oxfw->mutex); + snd_oxfw_stream_lock_release(oxfw); return 0; } diff --git a/sound/firewire/oxfw/oxfw-pcm.c b/sound/firewire/oxfw/oxfw-pcm.c index e84fc9c..9bc556b 100644 --- a/sound/firewire/oxfw/oxfw-pcm.c +++ b/sound/firewire/oxfw/oxfw-pcm.c @@ -192,10 +192,14 @@ static int pcm_open(struct snd_pcm_substream *substream) struct snd_oxfw *oxfw = substream->private_data; int err; - err = init_hw_params(oxfw, substream); + err = snd_oxfw_stream_lock_try(oxfw); if (err < 0) goto end; + err = init_hw_params(oxfw, substream); + if (err < 0) + goto err_locked; + /* * When any PCM streams are already running, the available sampling * rate is limited at current value. @@ -210,10 +214,16 @@ static int pcm_open(struct snd_pcm_substream *substream) snd_pcm_set_sync(substream); end: return err; +err_locked: + snd_oxfw_stream_lock_release(oxfw); + return err; } static int pcm_close(struct snd_pcm_substream *substream) { + struct snd_oxfw *oxfw = substream->private_data; + + snd_oxfw_stream_lock_release(oxfw); return 0; } diff --git a/sound/firewire/oxfw/oxfw-stream.c b/sound/firewire/oxfw/oxfw-stream.c index a38b3c3..b77cf80 100644 --- a/sound/firewire/oxfw/oxfw-stream.c +++ b/sound/firewire/oxfw/oxfw-stream.c @@ -644,3 +644,42 @@ int snd_oxfw_stream_discover(struct snd_oxfw *oxfw) end: return err; } + +void snd_oxfw_stream_lock_changed(struct snd_oxfw *oxfw) +{ + oxfw->dev_lock_changed = true; + wake_up(&oxfw->hwdep_wait); +} + +int snd_oxfw_stream_lock_try(struct snd_oxfw *oxfw) +{ + int err; + + spin_lock_irq(&oxfw->lock); + + /* user land lock this */ + if (oxfw->dev_lock_count < 0) { + err = -EBUSY; + goto end; + } + + /* this is the first time */ + if (oxfw->dev_lock_count++ == 0) + snd_oxfw_stream_lock_changed(oxfw); + err = 0; +end: + spin_unlock_irq(&oxfw->lock); + return err; +} + +void snd_oxfw_stream_lock_release(struct snd_oxfw *oxfw) +{ + spin_lock_irq(&oxfw->lock); + + if (WARN_ON(oxfw->dev_lock_count <= 0)) + goto end; + if (--oxfw->dev_lock_count == 0) + snd_oxfw_stream_lock_changed(oxfw); +end: + spin_unlock_irq(&oxfw->lock); +} diff --git a/sound/firewire/oxfw/oxfw.c b/sound/firewire/oxfw/oxfw.c index 9cfbfb1..cf1d0b5 100644 --- a/sound/firewire/oxfw/oxfw.c +++ b/sound/firewire/oxfw/oxfw.c @@ -139,6 +139,7 @@ static int oxfw_probe(struct fw_unit *unit, oxfw->unit = unit; oxfw->device_info = (const struct device_info *)id->driver_data; spin_lock_init(&oxfw->lock); + init_waitqueue_head(&oxfw->hwdep_wait); err = snd_oxfw_stream_discover(oxfw); if (err < 0) @@ -164,6 +165,10 @@ static int oxfw_probe(struct fw_unit *unit, if (err < 0) goto error; + err = snd_oxfw_create_hwdep(oxfw); + if (err < 0) + goto error; + err = snd_oxfw_stream_init_simplex(oxfw, &oxfw->rx_stream); if (err < 0) goto error; diff --git a/sound/firewire/oxfw/oxfw.h b/sound/firewire/oxfw/oxfw.h index 83a54fc..cace5ad 100644 --- a/sound/firewire/oxfw/oxfw.h +++ b/sound/firewire/oxfw/oxfw.h @@ -12,6 +12,7 @@ #include #include #include +#include #include #include @@ -20,6 +21,8 @@ #include #include #include +#include +#include #include "../lib.h" #include "../fcp.h" @@ -64,6 +67,10 @@ struct snd_oxfw { s16 volume[6]; s16 volume_min; s16 volume_max; + + int dev_lock_count; + bool dev_lock_changed; + wait_queue_head_t hwdep_wait; }; /* @@ -124,6 +131,10 @@ int snd_oxfw_stream_get_current_formation(struct snd_oxfw *oxfw, int snd_oxfw_stream_discover(struct snd_oxfw *oxfw); +void snd_oxfw_stream_lock_changed(struct snd_oxfw *oxfw); +int snd_oxfw_stream_lock_try(struct snd_oxfw *oxfw); +void snd_oxfw_stream_lock_release(struct snd_oxfw *oxfw); + int snd_oxfw_create_pcm(struct snd_oxfw *oxfw); int snd_oxfw_create_mixer(struct snd_oxfw *oxfw); @@ -131,3 +142,5 @@ int snd_oxfw_create_mixer(struct snd_oxfw *oxfw); void snd_oxfw_proc_init(struct snd_oxfw *oxfw); int snd_oxfw_create_midi(struct snd_oxfw *oxfw); + +int snd_oxfw_create_hwdep(struct snd_oxfw *oxfw);