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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2021-10-15 11:08:24 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2021-10-15 18:52:15 +0300 |
| commit | ca15a09ccc5bd2731c5fcb667e6ea3bbbf8f5772 (patch) | |
| tree | b8d001f21f86125a1fc33ef1a3276059036a54fd /sound/firewire/motu | |
| parent | 7d843c494a9b69d07bc0588124599e3f665a1496 (diff) | |
| download | linux-ca15a09ccc5bd2731c5fcb667e6ea3bbbf8f5772.tar.xz | |
ALSA: firewire-motu: add ioctl command to read cached parameters in register DSP model
This patch adds new ioctl command for userspace applications to read
cached parameters of register DSP.
The structured data includes model-dependent parameters. Userspace
application should be carefully programmed so that what parameter is
common and specific.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20211015080826.34847-10-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/motu')
| -rw-r--r-- | sound/firewire/motu/motu-hwdep.c | 21 | ||||
| -rw-r--r-- | sound/firewire/motu/motu-register-dsp-message-parser.c | 11 | ||||
| -rw-r--r-- | sound/firewire/motu/motu.h | 3 |
3 files changed, 34 insertions, 1 deletions
diff --git a/sound/firewire/motu/motu-hwdep.c b/sound/firewire/motu/motu-hwdep.c index 7be576fe4516..699136b911c7 100644 --- a/sound/firewire/motu/motu-hwdep.c +++ b/sound/firewire/motu/motu-hwdep.c @@ -199,6 +199,27 @@ static int hwdep_ioctl(struct snd_hwdep *hwdep, struct file *file, return 0; } + case SNDRV_FIREWIRE_IOCTL_MOTU_REGISTER_DSP_PARAMETER: + { + struct snd_firewire_motu_register_dsp_parameter *param; + int err; + + if (!(motu->spec->flags & SND_MOTU_SPEC_REGISTER_DSP)) + return -ENXIO; + + param = kzalloc(sizeof(*param), GFP_KERNEL); + if (!param) + return -ENOMEM; + + snd_motu_register_dsp_message_parser_copy_parameter(motu, param); + + err = copy_to_user((void __user *)arg, param, sizeof(*param)); + kfree(param); + if (err) + return -EFAULT; + + return 0; + } default: return -ENOIOCTLCMD; } diff --git a/sound/firewire/motu/motu-register-dsp-message-parser.c b/sound/firewire/motu/motu-register-dsp-message-parser.c index d94ca4875714..ed9fd0cef200 100644 --- a/sound/firewire/motu/motu-register-dsp-message-parser.c +++ b/sound/firewire/motu/motu-register-dsp-message-parser.c @@ -299,3 +299,14 @@ void snd_motu_register_dsp_message_parser_copy_meter(struct snd_motu *motu, memcpy(meter, &parser->meter, sizeof(*meter)); spin_unlock_irqrestore(&parser->lock, flags); } + +void snd_motu_register_dsp_message_parser_copy_parameter(struct snd_motu *motu, + struct snd_firewire_motu_register_dsp_parameter *param) +{ + struct msg_parser *parser = motu->message_parser; + unsigned long flags; + + spin_lock_irqsave(&parser->lock, flags); + memcpy(param, &parser->param, sizeof(*param)); + spin_unlock_irqrestore(&parser->lock, flags); +} diff --git a/sound/firewire/motu/motu.h b/sound/firewire/motu/motu.h index 4f70036dea25..fa0b3ab7b78d 100644 --- a/sound/firewire/motu/motu.h +++ b/sound/firewire/motu/motu.h @@ -280,7 +280,8 @@ void snd_motu_register_dsp_message_parser_parse(struct snd_motu *motu, const str unsigned int desc_count, unsigned int data_block_quadlets); void snd_motu_register_dsp_message_parser_copy_meter(struct snd_motu *motu, struct snd_firewire_motu_register_dsp_meter *meter); - +void snd_motu_register_dsp_message_parser_copy_parameter(struct snd_motu *motu, + struct snd_firewire_motu_register_dsp_parameter *params); int snd_motu_command_dsp_message_parser_new(struct snd_motu *motu); int snd_motu_command_dsp_message_parser_init(struct snd_motu *motu, enum cip_sfc sfc); |