32 struct scs {  struct
59 	struct scs *scs = stream->rmidi->private_data;  in scs_output_open()  argument
61 	scs->output_status = 0;  in scs_output_open()
62 	scs->output_bytes = 1;  in scs_output_open()
63 	scs->output_escaped = false;  in scs_output_open()
75 	struct scs *scs = stream->rmidi->private_data;  in scs_output_trigger()  local
77 	ACCESS_ONCE(scs->output) = up ? stream : NULL;  in scs_output_trigger()
79 		scs->output_idle = false;  in scs_output_trigger()
80 		tasklet_schedule(&scs->tasklet);  in scs_output_trigger()
87 	struct scs *scs = callback_data;  in scs_write_callback()  local
93 	scs->transaction_running = false;  in scs_write_callback()
94 	tasklet_schedule(&scs->tasklet);  in scs_write_callback()
132 	struct scs *scs = (void *)data;  in scs_output_tasklet()  local
139 	if (scs->transaction_running)  in scs_output_tasklet()
142 	stream = ACCESS_ONCE(scs->output);  in scs_output_tasklet()
144 		scs->output_idle = true;  in scs_output_tasklet()
145 		wake_up(&scs->idle_wait);  in scs_output_tasklet()
149 	i = scs->output_bytes;  in scs_output_tasklet()
152 			scs->output_bytes = i;  in scs_output_tasklet()
153 			scs->output_idle = true;  in scs_output_tasklet()
154 			wake_up(&scs->idle_wait);  in scs_output_tasklet()
161 		if (scs->output_escaped && byte < 0x80) {  in scs_output_tasklet()
162 			if (scs->output_escape_high_nibble) {  in scs_output_tasklet()
164 					scs->buffer[i] = byte << 4;  in scs_output_tasklet()
165 					scs->output_escape_high_nibble = false;  in scs_output_tasklet()
168 				scs->buffer[i++] |= byte & 0x0f;  in scs_output_tasklet()
169 				scs->output_escape_high_nibble = true;  in scs_output_tasklet()
173 				if (!is_valid_running_status(scs->output_status))  in scs_output_tasklet()
175 				scs->buffer[0] = HSS1394_TAG_USER_DATA;  in scs_output_tasklet()
176 				scs->buffer[i++] = scs->output_status;  in scs_output_tasklet()
178 			scs->buffer[i++] = byte;  in scs_output_tasklet()
179 			if ((i == 3 && is_two_bytes_cmd(scs->output_status)) ||  in scs_output_tasklet()
180 			    (i == 4 && is_three_bytes_cmd(scs->output_status)))  in scs_output_tasklet()
183 			    !memcmp(scs->buffer + 1, sysex_escape_prefix,  in scs_output_tasklet()
185 				scs->output_escaped = true;  in scs_output_tasklet()
186 				scs->output_escape_high_nibble = true;  in scs_output_tasklet()
192 			if (scs->output_escaped) {  in scs_output_tasklet()
193 				if (i >= 1 && scs->output_escape_high_nibble &&  in scs_output_tasklet()
194 				    scs->buffer[0] != HSS1394_TAG_CHANGE_ADDRESS)  in scs_output_tasklet()
197 				if (i > 1 && scs->output_status == 0xf0) {  in scs_output_tasklet()
198 					scs->buffer[i++] = 0xf7;  in scs_output_tasklet()
203 			scs->output_escaped = false;  in scs_output_tasklet()
207 			scs->buffer[0] = HSS1394_TAG_USER_DATA;  in scs_output_tasklet()
208 			scs->buffer[i++] = byte;  in scs_output_tasklet()
209 			scs->output_status = byte;  in scs_output_tasklet()
210 			scs->output_escaped = false;  in scs_output_tasklet()
215 	scs->output_bytes = 1;  in scs_output_tasklet()
216 	scs->output_escaped = false;  in scs_output_tasklet()
218 	scs->transaction_running = true;  in scs_output_tasklet()
219 	dev = fw_parent_device(scs->unit);  in scs_output_tasklet()
222 	fw_send_request(dev->card, &scs->transaction, TCODE_WRITE_BLOCK_REQUEST,  in scs_output_tasklet()
224 			HSS1394_ADDRESS, scs->buffer, i,  in scs_output_tasklet()
225 			scs_write_callback, scs);  in scs_output_tasklet()
230 	struct scs *scs = stream->rmidi->private_data;  in scs_output_drain()  local
232 	wait_event(scs->idle_wait, scs->output_idle);  in scs_output_drain()
244 	struct scs *scs = stream->rmidi->private_data;  in scs_input_open()  local
246 	scs->input_escape_count = 0;  in scs_input_open()
258 	struct scs *scs = stream->rmidi->private_data;  in scs_input_trigger()  local
260 	ACCESS_ONCE(scs->input) = up ? stream : NULL;  in scs_input_trigger()
273 static void scs_input_midi_byte(struct scs *scs,  in scs_input_midi_byte()  argument
277 	if (scs->input_escape_count > 0) {  in scs_input_midi_byte()
279 		scs->input_escape_count--;  in scs_input_midi_byte()
280 		if (scs->input_escape_count == 0)  in scs_input_midi_byte()
287 		scs->input_escape_count = 3;  in scs_input_midi_byte()
293 static void scs_input_packet(struct scs *scs,  in scs_input_packet()  argument
301 			scs_input_midi_byte(scs, stream, data[i]);  in scs_input_packet()
317 static int scs_create_midi(struct scs *scs)  in scs_create_midi()  argument
322 	err = snd_rawmidi_new(scs->card, "SCS.1x", 0, 1, 1, &rmidi);  in scs_create_midi()
326 		 "%s MIDI", scs->card->shortname);  in scs_create_midi()
330 	rmidi->private_data = scs;  in scs_create_midi()
342 	struct scs *scs = callback_data;  in handle_hss()  local
345 	if (offset != scs->hss_handler.offset) {  in handle_hss()
356 		stream = ACCESS_ONCE(scs->input);  in handle_hss()
358 			scs_input_packet(scs, stream, data, length);  in handle_hss()
364 static int scs_init_hss_address(struct scs *scs)  in scs_init_hss_address()  argument
370 			   scs->hss_handler.offset);  in scs_init_hss_address()
371 	err = snd_fw_transaction(scs->unit, TCODE_WRITE_BLOCK_REQUEST,  in scs_init_hss_address()
374 		dev_err(&scs->unit->device, "HSS1394 communication failed\n");  in scs_init_hss_address()
381 	struct scs *scs = card->private_data;  in scs_card_free()  local
383 	fw_core_remove_address_handler(&scs->hss_handler);  in scs_card_free()
384 	kfree(scs->buffer);  in scs_card_free()
391 	struct scs *scs;  in scs_probe()  local
395 			   sizeof(*scs), &card);  in scs_probe()
399 	scs = card->private_data;  in scs_probe()
400 	scs->card = card;  in scs_probe()
401 	scs->unit = unit;  in scs_probe()
402 	tasklet_init(&scs->tasklet, scs_output_tasklet, (unsigned long)scs);  in scs_probe()
403 	init_waitqueue_head(&scs->idle_wait);  in scs_probe()
404 	scs->output_idle = true;  in scs_probe()
406 	scs->buffer = kmalloc(HSS1394_MAX_PACKET_SIZE, GFP_KERNEL);  in scs_probe()
407 	if (!scs->buffer) {  in scs_probe()
412 	scs->hss_handler.length = HSS1394_MAX_PACKET_SIZE;  in scs_probe()
413 	scs->hss_handler.address_callback = handle_hss;  in scs_probe()
414 	scs->hss_handler.callback_data = scs;  in scs_probe()
415 	err = fw_core_add_address_handler(&scs->hss_handler,  in scs_probe()
432 	err = scs_init_hss_address(scs);  in scs_probe()
436 	err = scs_create_midi(scs);  in scs_probe()
444 	dev_set_drvdata(&unit->device, scs);  in scs_probe()
449 	kfree(scs->buffer);  in scs_probe()
457 	struct scs *scs = dev_get_drvdata(&unit->device);  in scs_update()  local
462 			   scs->hss_handler.offset);  in scs_update()
465 	snd_fw_transaction(scs->unit, TCODE_WRITE_BLOCK_REQUEST,  in scs_update()
472 	struct scs *scs = dev_get_drvdata(&unit->device);  in scs_remove()  local
474 	snd_card_disconnect(scs->card);  in scs_remove()
476 	ACCESS_ONCE(scs->output) = NULL;  in scs_remove()
477 	ACCESS_ONCE(scs->input) = NULL;  in scs_remove()
479 	wait_event(scs->idle_wait, scs->output_idle);  in scs_remove()
481 	tasklet_kill(&scs->tasklet);  in scs_remove()
483 	snd_card_free_when_closed(scs->card);  in scs_remove()