3  *  ISA DMA support functions
9  * ISA DMA controllers.
15 #include <linux/isa-dma.h>
19  * snd_dma_program - program an ISA DMA transfer
20  * @dma: the dma number
22  * @size: the DMA transfer size
23  * @mode: the DMA transfer mode, DMA_MODE_XXX
25  * Programs an ISA DMA transfer for the given buffer.
27 void snd_dma_program(unsigned long dma,  in snd_dma_program()  argument
34 	disable_dma(dma);  in snd_dma_program()
35 	clear_dma_ff(dma);  in snd_dma_program()
36 	set_dma_mode(dma, mode);  in snd_dma_program()
37 	set_dma_addr(dma, addr);  in snd_dma_program()
38 	set_dma_count(dma, size);  in snd_dma_program()
40 		enable_dma(dma);  in snd_dma_program()
46  * snd_dma_disable - stop the ISA DMA transfer
47  * @dma: the dma number
49  * Stops the ISA DMA transfer.
51 void snd_dma_disable(unsigned long dma)  in snd_dma_disable()  argument
56 	clear_dma_ff(dma);  in snd_dma_disable()
57 	disable_dma(dma);  in snd_dma_disable()
63  * snd_dma_pointer - return the current pointer to DMA transfer buffer in bytes
64  * @dma: the dma number
65  * @size: the dma transfer size
67  * Return: The current pointer in DMA transfer buffer in bytes.
69 unsigned int snd_dma_pointer(unsigned long dma, unsigned int size)  in snd_dma_pointer()  argument
75 	clear_dma_ff(dma);  in snd_dma_pointer()
77 		disable_dma(dma);  in snd_dma_pointer()
78 	result = get_dma_residue(dma);  in snd_dma_pointer()
84 	result1 = get_dma_residue(dma);  in snd_dma_pointer()
86 		enable_dma(dma);  in snd_dma_pointer()
92 …pr_err("ALSA: pointer (0x%x) for DMA #%ld is greater than transfer size (0x%x)\n", result, dma, si…  in snd_dma_pointer()
102 	int dma;  member
109 	snd_dma_disable(p->dma);  in __snd_release_dma()
110 	free_dma(p->dma);  in __snd_release_dma()
116  * @dma: the dma number
119  * The requested DMA will be automatically released at unbinding via devres.
123 int snd_devm_request_dma(struct device *dev, int dma, const char *name)  in snd_devm_request_dma()  argument
127 	if (request_dma(dma, name))  in snd_devm_request_dma()
131 		free_dma(dma);  in snd_devm_request_dma()
134 	p->dma = dma;  in snd_devm_request_dma()