include/asm/dma.h

214 static __inline__ void enable_dma(unsigned int dmanr)
216 	if (dmanr<=3)
217 		dma_outb(dmanr,  DMA1_MASK_REG);
219 		dma_outb(dmanr & 3,  DMA2_MASK_REG);
222 static __inline__ void disable_dma(unsigned int dmanr)
224 	if (dmanr<=3)
225 		dma_outb(dmanr | 4,  DMA1_MASK_REG);
227 		dma_outb((dmanr & 3) | 4,  DMA2_MASK_REG);
237 static __inline__ void clear_dma_ff(unsigned int dmanr)
239 	if (dmanr<=3)
246 static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
248 	if (dmanr<=3)
249 		dma_outb(mode | dmanr,  DMA1_MODE_REG);
251 		dma_outb(mode | (dmanr&3),  DMA2_MODE_REG);
255 static __inline__ void set_dma_ext_mode(unsigned int dmanr, char ext_mode)
257 	if (dmanr<=3)
258 		dma_outb(ext_mode | dmanr,  DMA1_EXT_MODE_REG);
260 		dma_outb(ext_mode | (dmanr&3),  DMA2_EXT_MODE_REG);
267 static __inline__ void set_dma_page(unsigned int dmanr, unsigned int pagenr)
269 	switch(dmanr) {
305 static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int a)
307 	if (dmanr <= 3)  {
308 	    dma_outb( a & 0xff, ((dmanr&3)<<1) + IO_DMA1_BASE );
309             dma_outb( (a>>8) & 0xff, ((dmanr&3)<<1) + IO_DMA1_BASE );
311 	    dma_outb( (a>>1) & 0xff, ((dmanr&3)<<2) + IO_DMA2_BASE );
312 	    dma_outb( (a>>9) & 0xff, ((dmanr&3)<<2) + IO_DMA2_BASE );
314 	set_dma_page(dmanr, a>>16);	/* set hipage last to enable 32-bit mode */
326 static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
329 	if (dmanr <= 3)  {
330 	    dma_outb( count & 0xff, ((dmanr&3)<<1) + 1 + IO_DMA1_BASE );
331 	    dma_outb( (count>>8) & 0xff, ((dmanr&3)<<1) + 1 + IO_DMA1_BASE );
333 	    dma_outb( (count>>1) & 0xff, ((dmanr&3)<<2) + 2 + IO_DMA2_BASE );
334 	    dma_outb( (count>>9) & 0xff, ((dmanr&3)<<2) + 2 + IO_DMA2_BASE );
347 static __inline__ int get_dma_residue(unsigned int dmanr)
349 	unsigned int io_port = (dmanr<=3)? ((dmanr&3)<<1) + 1 + IO_DMA1_BASE
350 					 : ((dmanr&3)<<2) + 2 + IO_DMA2_BASE;
358 	return (dmanr<=3)? count : (count<<1);
363 extern int request_dma(unsigned int dmanr, const char * device_id);	/* reserve a DMA channel */
364 extern void free_dma(unsigned int dmanr);	/* release it again */
366 extern int check_dma(unsigned int dmanr);