2  *  SGI GBE frame buffer driver
31 #include <video/gbe.h>
33 static struct sgi_gbe *gbe;  variable
58 #error GBE Framebuffer cannot use more than 8MB of memory
186 	gbe->ctrlstat = 0x300aa000;  in gbe_reset()
193  * Description:	This should turn off the monitor and gbe.  This is used
206 	val = gbe->vt_xy;  in gbe_turn_off()
211 	val = gbe->ovr_control;  in gbe_turn_off()
213 	gbe->ovr_control = val;  in gbe_turn_off()
215 	val = gbe->frm_control;  in gbe_turn_off()
217 	gbe->frm_control = val;  in gbe_turn_off()
219 	val = gbe->did_control;  in gbe_turn_off()
221 	gbe->did_control = val;  in gbe_turn_off()
227 		val = gbe->frm_inhwctrl;  in gbe_turn_off()
231 			val = gbe->ovr_inhwctrl;  in gbe_turn_off()
235 				val = gbe->did_inhwctrl;  in gbe_turn_off()
247 	val = gbe->vt_vpixen;  in gbe_turn_off()
251 		val = gbe->vt_xy;  in gbe_turn_off()
261 		val = gbe->vt_xy;  in gbe_turn_off()
273 	gbe->vt_xy = val;  in gbe_turn_off()
276 		val = gbe->vt_xy;  in gbe_turn_off()
286 	val = gbe->dotclock;  in gbe_turn_off()
288 	gbe->dotclock = val;  in gbe_turn_off()
291 		val = gbe->dotclock;  in gbe_turn_off()
301 	val = gbe->frm_size_tile;  in gbe_turn_off()
303 	gbe->frm_size_tile = val;  in gbe_turn_off()
305 	gbe->frm_size_tile = val;  in gbe_turn_off()
317 		val = gbe->vt_xy;  in gbe_turn_on()
323 	val = gbe->dotclock;  in gbe_turn_on()
325 	gbe->dotclock = val;  in gbe_turn_on()
328 		val = gbe->dotclock;  in gbe_turn_on()
340 	gbe->vt_xy = val;  in gbe_turn_on()
343 		val = gbe->vt_xy;  in gbe_turn_on()
353 	val = gbe->frm_control;  in gbe_turn_on()
355 	gbe->frm_control = val;  in gbe_turn_on()
358 		val = gbe->frm_inhwctrl;  in gbe_turn_on()
375 		for (j = 0; j < 1000 && gbe->cm_fifo >= 63; j++)  in gbe_loadcmap()
380 		gbe->cmap[i] = gbe_cmap[i];  in gbe_loadcmap()
419 	gbe->vt_flags = outputVal;  in gbefb_setup_flatpanel()
433 	gbe->fp_de = outputVal;  in gbefb_setup_flatpanel()
436 	gbe->fp_hdrv = outputVal;  in gbefb_setup_flatpanel()
440 	gbe->fp_vdrv = outputVal;  in gbefb_setup_flatpanel()
467 	 * GBE crystal runs at 20Mhz or 27Mhz  in compute_gbe_timing()
541 	gbe->dotclock = val;  in gbe_set_timing_info()
548 	gbe->vt_xymax = val;  in gbe_set_timing_info()
554 	gbe->vt_vsync = val;  in gbe_set_timing_info()
558 	gbe->vt_hsync = val;  in gbe_set_timing_info()
562 	gbe->vt_vblank = val;  in gbe_set_timing_info()
568 	gbe->vt_hblank = val;  in gbe_set_timing_info()
574 	gbe->vt_vcmap = val;  in gbe_set_timing_info()
578 	gbe->vt_hcmap = val;  in gbe_set_timing_info()
595 	gbe->did_start_xy = val;  in gbe_set_timing_info()
606 	gbe->crs_start_xy = val;  in gbe_set_timing_info()
611 	gbe->vc_start_xy = val;  in gbe_set_timing_info()
622 	gbe->vt_hpixen = val;  in gbe_set_timing_info()
627 	gbe->vt_vpixen = val;  in gbe_set_timing_info()
632 	gbe->vt_flags = val;  in gbe_set_timing_info()
656 	/* turn off GBE */  in gbefb_set_par()
681 		gbe->mode_regs[i] = val;  in gbefb_set_par()
684 	gbe->vt_intr01 = 0xffffffff;  in gbefb_set_par()
685 	gbe->vt_intr23 = 0xffffffff;  in gbefb_set_par()
688 	   The GBE hardware uses a tiled memory to screen mapping. Tiles are  in gbefb_set_par()
711 	   really convenient. In order to support linear addressing, the GBE  in gbefb_set_par()
717 	   framebuffer as a continuous virtual memory. The GBE tile table is  in gbefb_set_par()
720 	   GBE -> tile list    framebuffer           TLB   <------------ CPU  in gbefb_set_par()
726 	   The GBE hardware is then told that the buffer is 512*tweaked_height,  in gbefb_set_par()
728 	   Thus the GBE hardware will scan the first tile, filing the first 64k  in gbefb_set_par()
750 	/* Tell gbe about the tiles table location */  in gbefb_set_par()
758 	gbe->frm_control = val;  in gbefb_set_par()
783 	gbe->frm_size_tile = val;  in gbefb_set_par()
790 	gbe->frm_size_pixel = val;  in gbefb_set_par()
793 	gbe->did_control = 0;  in gbefb_set_par()
794 	gbe->ovr_width_tile = 0;  in gbefb_set_par()
797 	gbe->crs_ctl = 0;  in gbefb_set_par()
799 	/* Turn on GBE */  in gbefb_set_par()
805 		gbe->gmap[i] = (i << 24) | (i << 16) | (i << 8);  in gbefb_set_par()
820 	strcpy(fix->id, "SGI GBE");  in gbefb_encode_fix()
864 			for (i = 0; i < 1000 && gbe->cm_fifo >= 63; i++)  in gbefb_setcolreg()
870 			gbe->cmap[regno] = gbe_cmap[regno];  in gbefb_setcolreg()
1139 	if (!request_mem_region(GBE_BASE, sizeof(struct sgi_gbe), "GBE")) {  in gbefb_probe()
1145 	gbe = (struct sgi_gbe *) devm_ioremap(&p_dev->dev, GBE_BASE,  in gbefb_probe()
1147 	if (!gbe) {  in gbefb_probe()
1152 	gbe_revision = gbe->ctrlstat & 15;  in gbefb_probe()
1201 	/* reset GBE */  in gbefb_probe()