39 	struct audio_stream stream[2];	/* playback & capture */  member
42 static void au1000_release_dma_link(struct audio_stream *stream)  in au1000_release_dma_link()  argument
47 	stream->period_size = 0;  in au1000_release_dma_link()
48 	stream->periods = 0;  in au1000_release_dma_link()
49 	pointer = stream->buffer;  in au1000_release_dma_link()
56 	} while (pointer != stream->buffer);  in au1000_release_dma_link()
57 	stream->buffer = NULL;  in au1000_release_dma_link()
60 static int au1000_setup_dma_link(struct audio_stream *stream,  in au1000_setup_dma_link()  argument
64 	struct snd_pcm_substream *substream = stream->substream;  in au1000_setup_dma_link()
72 	if (stream->period_size == period_bytes &&  in au1000_setup_dma_link()
73 	    stream->periods == periods)  in au1000_setup_dma_link()
76 	au1000_release_dma_link(stream);  in au1000_setup_dma_link()
78 	stream->period_size = period_bytes;  in au1000_setup_dma_link()
79 	stream->periods = periods;  in au1000_setup_dma_link()
81 	stream->buffer = kmalloc(sizeof(struct pcm_period), GFP_KERNEL);  in au1000_setup_dma_link()
82 	if (!stream->buffer)  in au1000_setup_dma_link()
84 	pointer = stream->buffer;  in au1000_setup_dma_link()
92 				au1000_release_dma_link(stream);  in au1000_setup_dma_link()
98 	pointer->next = stream->buffer;  in au1000_setup_dma_link()
102 static void au1000_dma_stop(struct audio_stream *stream)  in au1000_dma_stop()  argument
104 	if (stream->buffer)  in au1000_dma_stop()
105 		disable_dma(stream->dma);  in au1000_dma_stop()
108 static void au1000_dma_start(struct audio_stream *stream)  in au1000_dma_start()  argument
110 	if (!stream->buffer)  in au1000_dma_start()
113 	init_dma(stream->dma);  in au1000_dma_start()
114 	if (get_dma_active_buffer(stream->dma) == 0) {  in au1000_dma_start()
115 		clear_dma_done0(stream->dma);  in au1000_dma_start()
116 		set_dma_addr0(stream->dma, stream->buffer->start);  in au1000_dma_start()
117 		set_dma_count0(stream->dma, stream->period_size >> 1);  in au1000_dma_start()
118 		set_dma_addr1(stream->dma, stream->buffer->next->start);  in au1000_dma_start()
119 		set_dma_count1(stream->dma, stream->period_size >> 1);  in au1000_dma_start()
121 		clear_dma_done1(stream->dma);  in au1000_dma_start()
122 		set_dma_addr1(stream->dma, stream->buffer->start);  in au1000_dma_start()
123 		set_dma_count1(stream->dma, stream->period_size >> 1);  in au1000_dma_start()
124 		set_dma_addr0(stream->dma, stream->buffer->next->start);  in au1000_dma_start()
125 		set_dma_count0(stream->dma, stream->period_size >> 1);  in au1000_dma_start()
127 	enable_dma_buffers(stream->dma);  in au1000_dma_start()
128 	start_dma(stream->dma);  in au1000_dma_start()
133 	struct audio_stream *stream = (struct audio_stream *)ptr;  in au1000_dma_interrupt()  local
134 	struct snd_pcm_substream *substream = stream->substream;  in au1000_dma_interrupt()
136 	switch (get_dma_buffer_done(stream->dma)) {  in au1000_dma_interrupt()
138 		stream->buffer = stream->buffer->next;  in au1000_dma_interrupt()
139 		clear_dma_done0(stream->dma);  in au1000_dma_interrupt()
140 		set_dma_addr0(stream->dma, stream->buffer->next->start);  in au1000_dma_interrupt()
141 		set_dma_count0(stream->dma, stream->period_size >> 1);  in au1000_dma_interrupt()
142 		enable_dma_buffer0(stream->dma);  in au1000_dma_interrupt()
145 		stream->buffer = stream->buffer->next;  in au1000_dma_interrupt()
146 		clear_dma_done1(stream->dma);  in au1000_dma_interrupt()
147 		set_dma_addr1(stream->dma, stream->buffer->next->start);  in au1000_dma_interrupt()
148 		set_dma_count1(stream->dma, stream->period_size >> 1);  in au1000_dma_interrupt()
149 		enable_dma_buffer1(stream->dma);  in au1000_dma_interrupt()
152 		pr_debug("DMA %d missed interrupt.\n", stream->dma);  in au1000_dma_interrupt()
153 		au1000_dma_stop(stream);  in au1000_dma_interrupt()
154 		au1000_dma_start(stream);  in au1000_dma_interrupt()
157 		pr_debug("DMA %d empty irq.\n", stream->dma);  in au1000_dma_interrupt()
183 	return &(ctx->stream[ss->stream]);  in ss_to_as()
190 	int *dmaids, s = substream->stream;  in alchemy_pcm_open()
199 	ctx->stream[s].dma = request_au1000_dma(dmaids[s], name,  in alchemy_pcm_open()
201 					&ctx->stream[s]);  in alchemy_pcm_open()
202 	set_dma_mode(ctx->stream[s].dma,  in alchemy_pcm_open()
203 		     get_dma_mode(ctx->stream[s].dma) & ~DMA_NC);  in alchemy_pcm_open()
205 	ctx->stream[s].substream = substream;  in alchemy_pcm_open()
206 	ctx->stream[s].buffer = NULL;  in alchemy_pcm_open()
215 	int stype = substream->stream;  in alchemy_pcm_close()
217 	ctx->stream[stype].substream = NULL;  in alchemy_pcm_close()
218 	free_au1000_dma(ctx->stream[stype].dma);  in alchemy_pcm_close()
226 	struct audio_stream *stream = ss_to_as(substream);  in alchemy_pcm_hw_params()  local
233 	err = au1000_setup_dma_link(stream,  in alchemy_pcm_hw_params()
244 	struct audio_stream *stream = ss_to_as(substream);  in alchemy_pcm_hw_free()  local
245 	au1000_release_dma_link(stream);  in alchemy_pcm_hw_free()
251 	struct audio_stream *stream = ss_to_as(substream);  in alchemy_pcm_trigger()  local
256 		au1000_dma_start(stream);  in alchemy_pcm_trigger()
259 		au1000_dma_stop(stream);  in alchemy_pcm_trigger()
270 	struct audio_stream *stream = ss_to_as(ss);  in alchemy_pcm_pointer()  local
273 	location = get_dma_residue(stream->dma);  in alchemy_pcm_pointer()
274 	location = stream->buffer->relative_end - location;  in alchemy_pcm_pointer()