270 static int pcm_open(struct snd_pcm_substream *substream,  in pcm_open()  argument
281 	chip = snd_pcm_substream_chip(substream);  in pcm_open()
282 	runtime = substream->runtime;  in pcm_open()
306 	snd_pcm_set_sync(substream);  in pcm_open()
331 	if ((err = snd_pcm_hw_rule_add(substream->runtime, 0,  in pcm_open()
350 static int pcm_analog_in_open(struct snd_pcm_substream *substream)  in pcm_analog_in_open()  argument
352 	struct echoaudio *chip = snd_pcm_substream_chip(substream);  in pcm_analog_in_open()
355 	if ((err = pcm_open(substream, num_analog_busses_in(chip) -  in pcm_analog_in_open()
356 			    substream->number)) < 0)  in pcm_analog_in_open()
358 	if ((err = snd_pcm_hw_rule_add(substream->runtime, 0,  in pcm_analog_in_open()
363 	if ((err = snd_pcm_hw_rule_add(substream->runtime, 0,  in pcm_analog_in_open()
379 static int pcm_analog_out_open(struct snd_pcm_substream *substream)  in pcm_analog_out_open()  argument
381 	struct echoaudio *chip = snd_pcm_substream_chip(substream);  in pcm_analog_out_open()
389 	if ((err = pcm_open(substream, max_channels - substream->number)) < 0)  in pcm_analog_out_open()
391 	if ((err = snd_pcm_hw_rule_add(substream->runtime, 0,  in pcm_analog_out_open()
397 	if ((err = snd_pcm_hw_rule_add(substream->runtime, 0,  in pcm_analog_out_open()
416 static int pcm_digital_in_open(struct snd_pcm_substream *substream)  in pcm_digital_in_open()  argument
418 	struct echoaudio *chip = snd_pcm_substream_chip(substream);  in pcm_digital_in_open()
421 	max_channels = num_digital_busses_in(chip) - substream->number;  in pcm_digital_in_open()
424 		err = pcm_open(substream, max_channels);  in pcm_digital_in_open()
428 		err = pcm_open(substream, max_channels - ECHOCARD_HAS_ADAT);  in pcm_digital_in_open()
433 	if ((err = snd_pcm_hw_rule_add(substream->runtime, 0,  in pcm_digital_in_open()
438 	if ((err = snd_pcm_hw_rule_add(substream->runtime, 0,  in pcm_digital_in_open()
457 static int pcm_digital_out_open(struct snd_pcm_substream *substream)  in pcm_digital_out_open()  argument
459 	struct echoaudio *chip = snd_pcm_substream_chip(substream);  in pcm_digital_out_open()
462 	max_channels = num_digital_busses_out(chip) - substream->number;  in pcm_digital_out_open()
465 		err = pcm_open(substream, max_channels);  in pcm_digital_out_open()
469 		err = pcm_open(substream, max_channels - ECHOCARD_HAS_ADAT);  in pcm_digital_out_open()
474 	if ((err = snd_pcm_hw_rule_add(substream->runtime, 0,  in pcm_digital_out_open()
480 	if ((err = snd_pcm_hw_rule_add(substream->runtime, 0,  in pcm_digital_out_open()
500 static int pcm_close(struct snd_pcm_substream *substream)  in pcm_close()  argument
502 	struct echoaudio *chip = snd_pcm_substream_chip(substream);  in pcm_close()
526 static int init_engine(struct snd_pcm_substream *substream,  in init_engine()  argument
534 	chip = snd_pcm_substream_chip(substream);  in init_engine()
535 	pipe = (struct audiopipe *) substream->runtime->private_data;  in init_engine()
545 		chip->substream[pipe->index] = NULL;  in init_engine()
562 	err = snd_pcm_lib_malloc_pages(substream,  in init_engine()
582 			addr = snd_pcm_sgbuf_get_addr(substream, offs);  in init_engine()
611 	chip->substream[pipe_index] = substream;  in init_engine()
621 static int pcm_analog_in_hw_params(struct snd_pcm_substream *substream,  in pcm_analog_in_hw_params()  argument
624 	struct echoaudio *chip = snd_pcm_substream_chip(substream);  in pcm_analog_in_hw_params()
626 	return init_engine(substream, hw_params, px_analog_in(chip) +  in pcm_analog_in_hw_params()
627 			substream->number, params_channels(hw_params));  in pcm_analog_in_hw_params()
632 static int pcm_analog_out_hw_params(struct snd_pcm_substream *substream,  in pcm_analog_out_hw_params()  argument
635 	return init_engine(substream, hw_params, substream->number,  in pcm_analog_out_hw_params()
643 static int pcm_digital_in_hw_params(struct snd_pcm_substream *substream,  in pcm_digital_in_hw_params()  argument
646 	struct echoaudio *chip = snd_pcm_substream_chip(substream);  in pcm_digital_in_hw_params()
648 	return init_engine(substream, hw_params, px_digital_in(chip) +  in pcm_digital_in_hw_params()
649 			substream->number, params_channels(hw_params));  in pcm_digital_in_hw_params()
655 static int pcm_digital_out_hw_params(struct snd_pcm_substream *substream,  in pcm_digital_out_hw_params()  argument
658 	struct echoaudio *chip = snd_pcm_substream_chip(substream);  in pcm_digital_out_hw_params()
660 	return init_engine(substream, hw_params, px_digital_out(chip) +  in pcm_digital_out_hw_params()
661 			substream->number, params_channels(hw_params));  in pcm_digital_out_hw_params()
669 static int pcm_hw_free(struct snd_pcm_substream *substream)  in pcm_hw_free()  argument
674 	chip = snd_pcm_substream_chip(substream);  in pcm_hw_free()
675 	pipe = (struct audiopipe *) substream->runtime->private_data;  in pcm_hw_free()
681 		chip->substream[pipe->index] = NULL;  in pcm_hw_free()
686 	snd_pcm_lib_free_pages(substream);  in pcm_hw_free()
692 static int pcm_prepare(struct snd_pcm_substream *substream)  in pcm_prepare()  argument
694 	struct echoaudio *chip = snd_pcm_substream_chip(substream);  in pcm_prepare()
695 	struct snd_pcm_runtime *runtime = substream->runtime;  in pcm_prepare()
736 static int pcm_trigger(struct snd_pcm_substream *substream, int cmd)  in pcm_trigger()  argument
738 	struct echoaudio *chip = snd_pcm_substream_chip(substream);  in pcm_trigger()
739 	struct snd_pcm_runtime *runtime = substream->runtime;  in pcm_trigger()
745 	snd_pcm_group_for_each_entry(s, substream) {  in pcm_trigger()
747 			if (s == chip->substream[i]) {  in pcm_trigger()
749 				snd_pcm_trigger_done(s, substream);  in pcm_trigger()
761 				pipe = chip->substream[i]->runtime->private_data;  in pcm_trigger()
783 				pipe = chip->substream[i]->runtime->private_data;  in pcm_trigger()
792 				pipe = chip->substream[i]->runtime->private_data;  in pcm_trigger()
807 static snd_pcm_uframes_t pcm_pointer(struct snd_pcm_substream *substream)  in pcm_pointer()  argument
809 	struct snd_pcm_runtime *runtime = substream->runtime;  in pcm_pointer()
816 	bufsize = substream->runtime->buffer_size;  in pcm_pointer()
817 	pos = bytes_to_frames(substream->runtime, pipe->position);  in pcm_pointer()
820 		pipe->position -= frames_to_bytes(substream->runtime, bufsize);  in pcm_pointer()
889 		for (ss = pcm->streams[stream].substream; ss; ss = ss->next) {  in snd_echo_preallocate_pages()
1825 	struct snd_pcm_substream *substream;  in snd_echo_interrupt()  local
1837 		substream = chip->substream[ss];  in snd_echo_interrupt()
1838 		if (substream && ((struct audiopipe *)substream->runtime->  in snd_echo_interrupt()
1840 			period = pcm_pointer(substream) /  in snd_echo_interrupt()
1841 				substream->runtime->period_size;  in snd_echo_interrupt()
1845 				snd_pcm_period_elapsed(substream);  in snd_echo_interrupt()