diff options
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/ump.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/sound/core/ump.c b/sound/core/ump.c index 651cd3752719..46ec297a786c 100644 --- a/sound/core/ump.c +++ b/sound/core/ump.c @@ -23,6 +23,11 @@ static long snd_ump_ioctl(struct snd_rawmidi *rmidi, unsigned int cmd, void __user *argp); static void snd_ump_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer); +static int snd_ump_rawmidi_open(struct snd_rawmidi_substream *substream); +static int snd_ump_rawmidi_close(struct snd_rawmidi_substream *substream); +static void snd_ump_rawmidi_trigger(struct snd_rawmidi_substream *substream, + int up); +static void snd_ump_rawmidi_drain(struct snd_rawmidi_substream *substream); static const struct snd_rawmidi_global_ops snd_ump_rawmidi_ops = { .dev_register = snd_ump_dev_register, @@ -31,6 +36,19 @@ static const struct snd_rawmidi_global_ops snd_ump_rawmidi_ops = { .proc_read = snd_ump_proc_read, }; +static const struct snd_rawmidi_ops snd_ump_rawmidi_input_ops = { + .open = snd_ump_rawmidi_open, + .close = snd_ump_rawmidi_close, + .trigger = snd_ump_rawmidi_trigger, +}; + +static const struct snd_rawmidi_ops snd_ump_rawmidi_output_ops = { + .open = snd_ump_rawmidi_open, + .close = snd_ump_rawmidi_close, + .trigger = snd_ump_rawmidi_trigger, + .drain = snd_ump_rawmidi_drain, +}; + static void snd_ump_endpoint_free(struct snd_rawmidi *rmidi) { struct snd_ump_endpoint *ump = rawmidi_to_ump(rmidi); @@ -104,6 +122,12 @@ int snd_ump_endpoint_new(struct snd_card *card, char *id, int device, ump->core.private_free = snd_ump_endpoint_free; ump->core.ops = &snd_ump_rawmidi_ops; + if (input) + snd_rawmidi_set_ops(&ump->core, SNDRV_RAWMIDI_STREAM_INPUT, + &snd_ump_rawmidi_input_ops); + if (output) + snd_rawmidi_set_ops(&ump->core, SNDRV_RAWMIDI_STREAM_OUTPUT, + &snd_ump_rawmidi_output_ops); ump_dbg(ump, "Created a UMP EP #%d (%s)\n", device, id); *ump_ret = ump; @@ -137,6 +161,93 @@ snd_ump_get_block(struct snd_ump_endpoint *ump, unsigned char id) return NULL; } +/* + * rawmidi ops for UMP endpoint + */ +static int snd_ump_rawmidi_open(struct snd_rawmidi_substream *substream) +{ + struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi); + int dir = substream->stream; + int err; + + if (ump->substreams[dir]) + return -EBUSY; + err = ump->ops->open(ump, dir); + if (err < 0) + return err; + ump->substreams[dir] = substream; + return 0; +} + +static int snd_ump_rawmidi_close(struct snd_rawmidi_substream *substream) +{ + struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi); + int dir = substream->stream; + + ump->substreams[dir] = NULL; + ump->ops->close(ump, dir); + return 0; +} + +static void snd_ump_rawmidi_trigger(struct snd_rawmidi_substream *substream, + int up) +{ + struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi); + int dir = substream->stream; + + ump->ops->trigger(ump, dir, up); +} + +static void snd_ump_rawmidi_drain(struct snd_rawmidi_substream *substream) +{ + struct snd_ump_endpoint *ump = rawmidi_to_ump(substream->rmidi); + + if (ump->ops->drain) + ump->ops->drain(ump, SNDRV_RAWMIDI_STREAM_OUTPUT); +} + +/** + * snd_ump_receive - transfer UMP packets from the device + * @ump: the UMP endpoint + * @buffer: the buffer pointer to transfer + * @count: byte size to transfer + * + * Called from the driver to submit the received UMP packets from the device + * to user-space. It's essentially a wrapper of rawmidi_receive(). + * The data to receive is in CPU-native endianness. + */ +int snd_ump_receive(struct snd_ump_endpoint *ump, const u32 *buffer, int count) +{ + struct snd_rawmidi_substream *substream = + ump->substreams[SNDRV_RAWMIDI_STREAM_INPUT]; + + if (!substream) + return 0; + return snd_rawmidi_receive(substream, (const char *)buffer, count); +} +EXPORT_SYMBOL_GPL(snd_ump_receive); + +/** + * snd_ump_transmit - transmit UMP packets + * @ump: the UMP endpoint + * @buffer: the buffer pointer to transfer + * @count: byte size to transfer + * + * Called from the driver to obtain the UMP packets from user-space to the + * device. It's essentially a wrapper of rawmidi_transmit(). + * The data to transmit is in CPU-native endianness. + */ +int snd_ump_transmit(struct snd_ump_endpoint *ump, u32 *buffer, int count) +{ + struct snd_rawmidi_substream *substream = + ump->substreams[SNDRV_RAWMIDI_STREAM_OUTPUT]; + + if (!substream) + return -ENODEV; + return snd_rawmidi_transmit(substream, (char *)buffer, count); +} +EXPORT_SYMBOL_GPL(snd_ump_transmit); + /** * snd_ump_block_new - Create a UMP block * @ump: UMP object |