sound/pci/hdsp-pcm.c

459 buffer_mux_write(uint32_t *dma, uint32_t *pcm, unsigned int pos,
464 	for (; pos < pos_end; ++pos) {
466 			dma[slot * HDSP_CHANBUF_SAMPLES + pos] =
467 			    pcm[pos * channels + slot];
474     unsigned int pos, unsigned int samples, unsigned int channels)
492 		buffer_mux_write(dma, pcm, pos, pos + samples, 1, channels);
494 		buffer_mux_write(dma, pcm, pos, pos + samples, 2, channels);
496 		buffer_mux_write(dma, pcm, pos, pos + samples, 4, channels);
498 		buffer_mux_write(dma, pcm, pos, pos + samples, 8, channels);
500 		buffer_mux_write(dma, pcm, pos, pos + samples, width, channels);
504 buffer_demux_read(uint32_t *dma, uint32_t *pcm, unsigned int pos,
509 	for (; pos < pos_end; ++pos) {
511 			pcm[pos * channels + slot] =
512 			    dma[slot * HDSP_CHANBUF_SAMPLES + pos];
519     unsigned int pos, unsigned int samples, unsigned int channels)
537 		buffer_demux_read(dma, pcm, pos, pos + samples, 1, channels);
539 		buffer_demux_read(dma, pcm, pos, pos + samples, 2, channels);
541 		buffer_demux_read(dma, pcm, pos, pos + samples, 4, channels);
543 		buffer_demux_read(dma, pcm, pos, pos + samples, 8, channels);
545 		buffer_demux_read(dma, pcm, pos, pos + samples, width, channels);
557 	unsigned int pos, length, remainder, offset, buffer_size;
571 		pos = sndbuf_getreadyptr(ch->buffer) / channels;
577 		offset = (ch->position + buffer_size) - pos;
580 			pos = (pos + offset) % buffer_size;
585 		pos = sndbuf_getfreeptr(ch->buffer) / channels;
591 		length = (dma_pos + buffer_size) - pos;
596 	pos /= 4;
602 	if (pos + length > buffer_size)
603 		remainder = (pos + length) - buffer_size;
612 			buffer_mux_port(sc->pbuf, ch->data, row, slots, pos,
617 			buffer_demux_port(sc->rbuf, ch->data, row, slots, pos,
627 	ch->position = ((pos + length) * 4) % buffer_size;
779 	uint32_t ret, pos;
789 	pos = ret & HDSP_BUF_POSITION_MASK;
790 	pos %= (2 * sc->period * sizeof(uint32_t)); /* Double buffer. */
791 	pos *= AFMT_CHANNEL(ch->format); /* Hardbuf with multiple channels. */
793 	return (pos);