99 static void set_dma_peripheral_map(unsigned int channel, const char *device_id)  in set_dma_peripheral_map()  argument
104 	switch (channel) {  in set_dma_peripheral_map()
113 		dma_ch[channel].regs->peripheral_map = per_map;  in set_dma_peripheral_map()
122 int request_dma(unsigned int channel, const char *device_id)  in request_dma()  argument
127 		printk(KERN_WARNING "request_dma(%u): no device_id given\n", channel);  in request_dma()
130 	if (channel >= CH_IMEM_STREAM0_DEST && channel <= CH_IMEM_STREAM1_DEST) {  in request_dma()
139 	if (atomic_cmpxchg(&dma_ch[channel].chan_status, 0, 1)) {  in request_dma()
144 	set_dma_peripheral_map(channel, device_id);  in request_dma()
145 	dma_ch[channel].device_id = device_id;  in request_dma()
146 	dma_ch[channel].irq = 0;  in request_dma()
157 int set_dma_callback(unsigned int channel, irq_handler_t callback, void *data)  in set_dma_callback()  argument
162 	BUG_ON(channel >= MAX_DMA_CHANNELS || !callback ||  in set_dma_callback()
163 			!atomic_read(&dma_ch[channel].chan_status));  in set_dma_callback()
165 	irq = channel2irq(channel);  in set_dma_callback()
166 	ret = request_irq(irq, callback, 0, dma_ch[channel].device_id, data);  in set_dma_callback()
170 	dma_ch[channel].irq = irq;  in set_dma_callback()
171 	dma_ch[channel].data = data;  in set_dma_callback()
183 static void clear_dma_buffer(unsigned int channel)  in clear_dma_buffer()  argument
185 	dma_ch[channel].regs->cfg |= RESTART;  in clear_dma_buffer()
187 	dma_ch[channel].regs->cfg &= ~RESTART;  in clear_dma_buffer()
190 void free_dma(unsigned int channel)  in free_dma()  argument
193 	BUG_ON(channel >= MAX_DMA_CHANNELS ||  in free_dma()
194 			!atomic_read(&dma_ch[channel].chan_status));  in free_dma()
197 	disable_dma(channel);  in free_dma()
198 	clear_dma_buffer(channel);  in free_dma()
200 	if (dma_ch[channel].irq)  in free_dma()
201 		free_irq(dma_ch[channel].irq, dma_ch[channel].data);  in free_dma()
204 	atomic_set(&dma_ch[channel].chan_status, 0);  in free_dma()