42 	struct audio_stream stream[2];	/* playback & capture */  member
45 static void au1000_release_dma_link(struct audio_stream *stream)  in au1000_release_dma_link()  argument
50 	stream->period_size = 0;  in au1000_release_dma_link()
51 	stream->periods = 0;  in au1000_release_dma_link()
52 	pointer = stream->buffer;  in au1000_release_dma_link()
59 	} while (pointer != stream->buffer);  in au1000_release_dma_link()
60 	stream->buffer = NULL;  in au1000_release_dma_link()
63 static int au1000_setup_dma_link(struct audio_stream *stream,  in au1000_setup_dma_link()  argument
67 	struct snd_pcm_substream *substream = stream->substream;  in au1000_setup_dma_link()
75 	if (stream->period_size == period_bytes &&  in au1000_setup_dma_link()
76 	    stream->periods == periods)  in au1000_setup_dma_link()
79 	au1000_release_dma_link(stream);  in au1000_setup_dma_link()
81 	stream->period_size = period_bytes;  in au1000_setup_dma_link()
82 	stream->periods = periods;  in au1000_setup_dma_link()
84 	stream->buffer = kmalloc(sizeof(struct pcm_period), GFP_KERNEL);  in au1000_setup_dma_link()
85 	if (!stream->buffer)  in au1000_setup_dma_link()
87 	pointer = stream->buffer;  in au1000_setup_dma_link()
95 				au1000_release_dma_link(stream);  in au1000_setup_dma_link()
101 	pointer->next = stream->buffer;  in au1000_setup_dma_link()
105 static void au1000_dma_stop(struct audio_stream *stream)  in au1000_dma_stop()  argument
107 	if (stream->buffer)  in au1000_dma_stop()
108 		disable_dma(stream->dma);  in au1000_dma_stop()
111 static void au1000_dma_start(struct audio_stream *stream)  in au1000_dma_start()  argument
113 	if (!stream->buffer)  in au1000_dma_start()
116 	init_dma(stream->dma);  in au1000_dma_start()
117 	if (get_dma_active_buffer(stream->dma) == 0) {  in au1000_dma_start()
118 		clear_dma_done0(stream->dma);  in au1000_dma_start()
119 		set_dma_addr0(stream->dma, stream->buffer->start);  in au1000_dma_start()
120 		set_dma_count0(stream->dma, stream->period_size >> 1);  in au1000_dma_start()
121 		set_dma_addr1(stream->dma, stream->buffer->next->start);  in au1000_dma_start()
122 		set_dma_count1(stream->dma, stream->period_size >> 1);  in au1000_dma_start()
124 		clear_dma_done1(stream->dma);  in au1000_dma_start()
125 		set_dma_addr1(stream->dma, stream->buffer->start);  in au1000_dma_start()
126 		set_dma_count1(stream->dma, stream->period_size >> 1);  in au1000_dma_start()
127 		set_dma_addr0(stream->dma, stream->buffer->next->start);  in au1000_dma_start()
128 		set_dma_count0(stream->dma, stream->period_size >> 1);  in au1000_dma_start()
130 	enable_dma_buffers(stream->dma);  in au1000_dma_start()
131 	start_dma(stream->dma);  in au1000_dma_start()
136 	struct audio_stream *stream = (struct audio_stream *)ptr;  in au1000_dma_interrupt()  local
137 	struct snd_pcm_substream *substream = stream->substream;  in au1000_dma_interrupt()
139 	switch (get_dma_buffer_done(stream->dma)) {  in au1000_dma_interrupt()
141 		stream->buffer = stream->buffer->next;  in au1000_dma_interrupt()
142 		clear_dma_done0(stream->dma);  in au1000_dma_interrupt()
143 		set_dma_addr0(stream->dma, stream->buffer->next->start);  in au1000_dma_interrupt()
144 		set_dma_count0(stream->dma, stream->period_size >> 1);  in au1000_dma_interrupt()
145 		enable_dma_buffer0(stream->dma);  in au1000_dma_interrupt()
148 		stream->buffer = stream->buffer->next;  in au1000_dma_interrupt()
149 		clear_dma_done1(stream->dma);  in au1000_dma_interrupt()
150 		set_dma_addr1(stream->dma, stream->buffer->next->start);  in au1000_dma_interrupt()
151 		set_dma_count1(stream->dma, stream->period_size >> 1);  in au1000_dma_interrupt()
152 		enable_dma_buffer1(stream->dma);  in au1000_dma_interrupt()
155 		pr_debug("DMA %d missed interrupt.\n", stream->dma);  in au1000_dma_interrupt()
156 		au1000_dma_stop(stream);  in au1000_dma_interrupt()
157 		au1000_dma_start(stream);  in au1000_dma_interrupt()
160 		pr_debug("DMA %d empty irq.\n", stream->dma);  in au1000_dma_interrupt()
187 	return &(ctx->stream[ss->stream]);  in ss_to_as()
195 	int *dmaids, s = substream->stream;  in alchemy_pcm_open()
204 	ctx->stream[s].dma = request_au1000_dma(dmaids[s], name,  in alchemy_pcm_open()
206 					&ctx->stream[s]);  in alchemy_pcm_open()
207 	set_dma_mode(ctx->stream[s].dma,  in alchemy_pcm_open()
208 		     get_dma_mode(ctx->stream[s].dma) & ~DMA_NC);  in alchemy_pcm_open()
210 	ctx->stream[s].substream = substream;  in alchemy_pcm_open()
211 	ctx->stream[s].buffer = NULL;  in alchemy_pcm_open()
221 	int stype = substream->stream;  in alchemy_pcm_close()
223 	ctx->stream[stype].substream = NULL;  in alchemy_pcm_close()
224 	free_au1000_dma(ctx->stream[stype].dma);  in alchemy_pcm_close()
233 	struct audio_stream *stream = ss_to_as(substream, component);  in alchemy_pcm_hw_params()  local
235 	return au1000_setup_dma_link(stream,  in alchemy_pcm_hw_params()
243 	struct audio_stream *stream = ss_to_as(substream, component);  in alchemy_pcm_hw_free()  local
244 	au1000_release_dma_link(stream);  in alchemy_pcm_hw_free()
251 	struct audio_stream *stream = ss_to_as(substream, component);  in alchemy_pcm_trigger()  local
256 		au1000_dma_start(stream);  in alchemy_pcm_trigger()
259 		au1000_dma_stop(stream);  in alchemy_pcm_trigger()
271 	struct audio_stream *stream = ss_to_as(ss, component);  in alchemy_pcm_pointer()  local
274 	location = get_dma_residue(stream->dma);  in alchemy_pcm_pointer()
275 	location = stream->buffer->relative_end - location;  in alchemy_pcm_pointer()