diff options
| author | Takashi Iwai <tiwai@suse.de> | 2023-06-21 13:02:41 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-06-21 13:06:19 +0200 |
| commit | 4dce2f076b7d0a0a99867b58eea7c212ff4e2be5 (patch) | |
| tree | e5aee7dd7454107341174213fd9fb321a16bd48d | |
| parent | eacd9c7f1d3ab8381a99b98b36652b5cf6ae8387 (diff) | |
ALSA: ump: Export snd_ump_receive_ump_val()
This is another preliminary patch for USB MIDI 2.0 gadget driver.
Export the currently local snd_ump_receive_ump_val(). It can be used
by the gadget driver for processing the UMP data.
Link: https://lore.kernel.org/r/20230621110241.4751-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | include/sound/ump.h | 1 | ||||
| -rw-r--r-- | sound/core/ump.c | 11 |
2 files changed, 9 insertions, 3 deletions
diff --git a/include/sound/ump.h b/include/sound/ump.h index 2f6a9944c6ef..44d2c2fd021d 100644 --- a/include/sound/ump.h +++ b/include/sound/ump.h @@ -109,6 +109,7 @@ static inline int snd_ump_attach_legacy_rawmidi(struct snd_ump_endpoint *ump, } #endif +int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val); int snd_ump_switch_protocol(struct snd_ump_endpoint *ump, unsigned int protocol); /* diff --git a/sound/core/ump.c b/sound/core/ump.c index 5e73c9cf5919..5e17351ca984 100644 --- a/sound/core/ump.c +++ b/sound/core/ump.c @@ -263,12 +263,16 @@ static unsigned char ump_packet_words[0x10] = { 1, 1, 1, 2, 2, 4, 1, 1, 2, 2, 2, 3, 3, 4, 4, 4 }; -/* parse the UMP packet data; - * the data is copied onto ump->input_buf[]. +/** + * snd_ump_receive_ump_val - parse the UMP packet data + * @ump: UMP endpoint + * @val: UMP packet data + * + * The data is copied onto ump->input_buf[]. * When a full packet is completed, returns the number of words (from 1 to 4). * OTOH, if the packet is incomplete, returns 0. */ -static int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val) +int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val) { int words; @@ -284,6 +288,7 @@ static int snd_ump_receive_ump_val(struct snd_ump_endpoint *ump, u32 val) } return 0; } +EXPORT_SYMBOL_GPL(snd_ump_receive_ump_val); /** * snd_ump_receive - transfer UMP packets from the device |