172 static __inline__ void enable_dma(unsigned int dmanr)  in enable_dma()  argument
174 	if (dmanr<=3)  in enable_dma()
175 		dma_outb(dmanr,	 DMA1_MASK_REG);  in enable_dma()
177 		dma_outb(dmanr & 3,  DMA2_MASK_REG);  in enable_dma()
180 static __inline__ void disable_dma(unsigned int dmanr)  in disable_dma()  argument
182 	if (dmanr<=3)  in disable_dma()
183 		dma_outb(dmanr | 4,  DMA1_MASK_REG);  in disable_dma()
185 		dma_outb((dmanr & 3) | 4,  DMA2_MASK_REG);  in disable_dma()
195 static __inline__ void clear_dma_ff(unsigned int dmanr)  in clear_dma_ff()  argument
197 	if (dmanr<=3)  in clear_dma_ff()
204 static __inline__ void set_dma_mode(unsigned int dmanr, char mode)  in set_dma_mode()  argument
206 	if (dmanr<=3)  in set_dma_mode()
207 		dma_outb(mode | dmanr,	DMA1_MODE_REG);  in set_dma_mode()
209 		dma_outb(mode | (dmanr&3),  DMA2_MODE_REG);  in set_dma_mode()
217 static __inline__ void set_dma_page(unsigned int dmanr, char pagenr)  in set_dma_page()  argument
219 	switch(dmanr) {  in set_dma_page()
248 static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int a)  in set_dma_addr()  argument
250 	set_dma_page(dmanr, a>>16);  in set_dma_addr()
251 	if (dmanr <= 3)	 {  in set_dma_addr()
252 	    dma_outb( a & 0xff, ((dmanr&3)<<1) + IO_DMA1_BASE );  in set_dma_addr()
253 	    dma_outb( (a>>8) & 0xff, ((dmanr&3)<<1) + IO_DMA1_BASE );  in set_dma_addr()
255 	    dma_outb( (a>>1) & 0xff, ((dmanr&3)<<2) + IO_DMA2_BASE );  in set_dma_addr()
256 	    dma_outb( (a>>9) & 0xff, ((dmanr&3)<<2) + IO_DMA2_BASE );  in set_dma_addr()
269 static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)  in set_dma_count()  argument
272 	if (dmanr <= 3)	 {  in set_dma_count()
273 	    dma_outb( count & 0xff, ((dmanr&3)<<1) + 1 + IO_DMA1_BASE );  in set_dma_count()
274 	    dma_outb( (count>>8) & 0xff, ((dmanr&3)<<1) + 1 + IO_DMA1_BASE );  in set_dma_count()
276 	    dma_outb( (count>>1) & 0xff, ((dmanr&3)<<2) + 2 + IO_DMA2_BASE );  in set_dma_count()
277 	    dma_outb( (count>>9) & 0xff, ((dmanr&3)<<2) + 2 + IO_DMA2_BASE );  in set_dma_count()
290 static __inline__ int get_dma_residue(unsigned int dmanr)  in get_dma_residue()  argument
292 	unsigned int io_port = (dmanr<=3)? ((dmanr&3)<<1) + 1 + IO_DMA1_BASE  in get_dma_residue()
293 					 : ((dmanr&3)<<2) + 2 + IO_DMA2_BASE;  in get_dma_residue()
301 	return (dmanr<=3)? count : (count<<1);  in get_dma_residue()
306 extern int request_dma(unsigned int dmanr, const char * device_id);	/* reserve a DMA channel */
307 extern void free_dma(unsigned int dmanr);	/* release it again */