49  *  non UDMA devices restrict each others performance. It also has a
57  *	-	ATAPI UDMA is ok but not MWDMA it seems
83 	u16	udma[2];		/* Cached UDMA values (per drive) */  member
130  *	it821x_program_udma	-	program the UDMA registers
134  *	Program the UDMA timing for this drive according to the
146 	/* Program UDMA timing bits */  in it821x_program_udma()
213 	 *	Reprogram the UDMA/PIO of the pair drive for the switch  in it821x_clock_strategy()
216 	if(pair && itdev->udma[1-unit] != UDMA_OFF) {  in it821x_clock_strategy()
217 		it821x_program_udma(pair, itdev->udma[1-unit]);  in it821x_clock_strategy()
221 	 *	Reprogram the UDMA/PIO of our drive for the switch.  in it821x_clock_strategy()
224 	if(itdev->udma[unit] != UDMA_OFF) {  in it821x_clock_strategy()
225 		it821x_program_udma(drive, itdev->udma[unit]);  in it821x_clock_strategy()
294 	itdev->udma[unit] = UDMA_OFF;  in it821x_tune_mwdma()
296 	/* UDMA bits off - Revision 0x10 do them in pairs */  in it821x_tune_mwdma()
310  *	it821x_tune_udma	-	tune a channel for UDMA
315  *	controller when doing UDMA modes in pass through.
325 	static u16 udma[]	= { 0x4433, 0x4231, 0x3121, 0x2121, 0x1111, 0x2211, 0x1111 };  in it821x_tune_udma()  local
329 	itdev->want[unit][0] = 3;	/* UDMA is high priority */  in it821x_tune_udma()
331 	itdev->udma[unit] = udma[mode_wanted];  in it821x_tune_udma()
333 		itdev->udma[unit] |= 0x8080;	/* UDMA 5/6 select on */  in it821x_tune_udma()
335 	/* UDMA on. Again revision 0x10 must do the pair */  in it821x_tune_udma()
344 	it821x_program_udma(drive, itdev->udma[unit]);  in it821x_tune_udma()
355  *	timing value is loaded into the master and slave UDMA clock
369 	else if(itdev->udma[unit] != UDMA_OFF && itdev->timing10)  in it821x_dma_start()
370 		it821x_program_udma(drive, itdev->udma[unit]);  in it821x_dma_start()