57 static int scs_output_open(struct snd_rawmidi_substream *stream)  in scs_output_open()  argument
59 	struct scs *scs = stream->rmidi->private_data;  in scs_output_open()
68 static int scs_output_close(struct snd_rawmidi_substream *stream)  in scs_output_close()  argument
73 static void scs_output_trigger(struct snd_rawmidi_substream *stream, int up)  in scs_output_trigger()  argument
75 	struct scs *scs = stream->rmidi->private_data;  in scs_output_trigger()
77 	ACCESS_ONCE(scs->output) = up ? stream : NULL;  in scs_output_trigger()
133 	struct snd_rawmidi_substream *stream;  in scs_output_tasklet()  local
142 	stream = ACCESS_ONCE(scs->output);  in scs_output_tasklet()
143 	if (!stream) {  in scs_output_tasklet()
151 		if (snd_rawmidi_transmit(stream, &byte, 1) != 1) {  in scs_output_tasklet()
228 static void scs_output_drain(struct snd_rawmidi_substream *stream)  in scs_output_drain()  argument
230 	struct scs *scs = stream->rmidi->private_data;  in scs_output_drain()
242 static int scs_input_open(struct snd_rawmidi_substream *stream)  in scs_input_open()  argument
244 	struct scs *scs = stream->rmidi->private_data;  in scs_input_open()
251 static int scs_input_close(struct snd_rawmidi_substream *stream)  in scs_input_close()  argument
256 static void scs_input_trigger(struct snd_rawmidi_substream *stream, int up)  in scs_input_trigger()  argument
258 	struct scs *scs = stream->rmidi->private_data;  in scs_input_trigger()
260 	ACCESS_ONCE(scs->input) = up ? stream : NULL;  in scs_input_trigger()
263 static void scs_input_escaped_byte(struct snd_rawmidi_substream *stream,  in scs_input_escaped_byte()  argument
270 	snd_rawmidi_receive(stream, nibbles, 2);  in scs_input_escaped_byte()
274 				struct snd_rawmidi_substream *stream,  in scs_input_midi_byte()  argument
278 		scs_input_escaped_byte(stream, byte);  in scs_input_midi_byte()
281 			snd_rawmidi_receive(stream, (const u8[]) { 0xf7 }, 1);  in scs_input_midi_byte()
283 		snd_rawmidi_receive(stream, sysex_escape_prefix,  in scs_input_midi_byte()
285 		scs_input_escaped_byte(stream, 0x00);  in scs_input_midi_byte()
286 		scs_input_escaped_byte(stream, 0xf9);  in scs_input_midi_byte()
289 		snd_rawmidi_receive(stream, &byte, 1);  in scs_input_midi_byte()
294 			     struct snd_rawmidi_substream *stream,  in scs_input_packet()  argument
301 			scs_input_midi_byte(scs, stream, data[i]);  in scs_input_packet()
303 		snd_rawmidi_receive(stream, sysex_escape_prefix,  in scs_input_packet()
306 			scs_input_escaped_byte(stream, data[i]);  in scs_input_packet()
307 		snd_rawmidi_receive(stream, (const u8[]) { 0xf7 }, 1);  in scs_input_packet()
343 	struct snd_rawmidi_substream *stream;  in handle_hss()  local
356 		stream = ACCESS_ONCE(scs->input);  in handle_hss()
357 		if (stream)  in handle_hss()
358 			scs_input_packet(scs, stream, data, length);  in handle_hss()