2  *  ISA DMA support functions
24  * ISA DMA controllers.
31 #include <asm/dma.h>
34  * snd_dma_program - program an ISA DMA transfer
35  * @dma: the dma number
37  * @size: the DMA transfer size
38  * @mode: the DMA transfer mode, DMA_MODE_XXX
40  * Programs an ISA DMA transfer for the given buffer.
42 void snd_dma_program(unsigned long dma,  in snd_dma_program()  argument
49 	disable_dma(dma);  in snd_dma_program()
50 	clear_dma_ff(dma);  in snd_dma_program()
51 	set_dma_mode(dma, mode);  in snd_dma_program()
52 	set_dma_addr(dma, addr);  in snd_dma_program()
53 	set_dma_count(dma, size);  in snd_dma_program()
55 		enable_dma(dma);  in snd_dma_program()
61  * snd_dma_disable - stop the ISA DMA transfer
62  * @dma: the dma number
64  * Stops the ISA DMA transfer.
66 void snd_dma_disable(unsigned long dma)  in snd_dma_disable()  argument
71 	clear_dma_ff(dma);  in snd_dma_disable()
72 	disable_dma(dma);  in snd_dma_disable()
78  * snd_dma_pointer - return the current pointer to DMA transfer buffer in bytes
79  * @dma: the dma number
80  * @size: the dma transfer size
82  * Return: The current pointer in DMA transfer buffer in bytes.
84 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size)  in snd_dma_pointer()  argument
90 	clear_dma_ff(dma);  in snd_dma_pointer()
92 		disable_dma(dma);  in snd_dma_pointer()
93 	result = get_dma_residue(dma);  in snd_dma_pointer()
99 	result1 = get_dma_residue(dma);  in snd_dma_pointer()
101 		enable_dma(dma);  in snd_dma_pointer()
107 …pr_err("ALSA: pointer (0x%x) for DMA #%ld is greater than transfer size (0x%x)\n", result, dma, si…  in snd_dma_pointer()