4  *      A DMA channel allocator for Au1x00. API is modeled loosely off of
9  * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
40 #include <asm/mach-au1x00/au1000.h>
41 #include <asm/mach-au1x00/au1000_dma.h>
55  * done interrupt, you won't know the irq number until the DMA channel is
59 /* DMA Channel register block spacing */
65       {.dev_id = -1,},
66       {.dev_id = -1,},
67       {.dev_id = -1,},
68       {.dev_id = -1,},
69       {.dev_id = -1,},
70       {.dev_id = -1,},
71       {.dev_id = -1,},
72       {.dev_id = -1,}
110 				       i, chan->dev_str);  in au1000_dma_read_proc()
119 	len -= fpos;  in au1000_dma_read_proc()
126 /* Device FIFO addresses and default DMA modes - 2nd bank */
144 	       __raw_readl(chan->io + DMA_MODE_SET));  in dump_au1000_dma_channel()
146 	       __raw_readl(chan->io + DMA_PERIPHERAL_ADDR));  in dump_au1000_dma_channel()
148 	       __raw_readl(chan->io + DMA_BUFFER0_START));  in dump_au1000_dma_channel()
150 	       __raw_readl(chan->io + DMA_BUFFER1_START));  in dump_au1000_dma_channel()
152 	       __raw_readl(chan->io + DMA_BUFFER0_COUNT));  in dump_au1000_dma_channel()
154 	       __raw_readl(chan->io + DMA_BUFFER1_COUNT));  in dump_au1000_dma_channel()
158  * Finds a free channel, and binds the requested device to it.
159  * Returns the allocated channel number, or negative on error.
173 			return -EINVAL;  in request_au1000_dma()
176 			return -EINVAL;  in request_au1000_dma()
184 		return -ENODEV;  in request_au1000_dma()
189 		dev_id -= DMA_NUM_DEV;  in request_au1000_dma()
195 		chan->irq_dev = irq_dev_id;  in request_au1000_dma()
196 		ret = request_irq(chan->irq, irqhandler, irqflags, dev_str,  in request_au1000_dma()
197 				  chan->irq_dev);  in request_au1000_dma()
199 			chan->irq_dev = NULL;  in request_au1000_dma()
203 		chan->irq_dev = NULL;  in request_au1000_dma()
207 	chan->io = (void __iomem *)(KSEG1ADDR(AU1000_DMA_PHYS_ADDR) +  in request_au1000_dma()
209 	chan->dev_id = dev_id;  in request_au1000_dma()
210 	chan->dev_str = dev_str;  in request_au1000_dma()
211 	chan->fifo_addr = dev->fifo_addr;  in request_au1000_dma()
212 	chan->mode = dev->dma_mode;  in request_au1000_dma()
214 	/* initialize the channel before returning */  in request_au1000_dma()
231 	if (chan->irq_dev)  in free_au1000_dma()
232 		free_irq(chan->irq, chan->irq_dev);  in free_au1000_dma()
234 	chan->irq_dev = NULL;  in free_au1000_dma()
235 	chan->dev_id = -1;  in free_au1000_dma()