2  *  SGI GBE frame buffer driver
32 #include <video/gbe.h>
34 static struct sgi_gbe *gbe;  variable
59 #error GBE Framebuffer cannot use more than 8MB of memory
187 	gbe->ctrlstat = 0x300aa000;  in gbe_reset()
194  * Description:	This should turn off the monitor and gbe.  This is used
207 	val = gbe->vt_xy;  in gbe_turn_off()
212 	val = gbe->ovr_control;  in gbe_turn_off()
214 	gbe->ovr_control = val;  in gbe_turn_off()
216 	val = gbe->frm_control;  in gbe_turn_off()
218 	gbe->frm_control = val;  in gbe_turn_off()
220 	val = gbe->did_control;  in gbe_turn_off()
222 	gbe->did_control = val;  in gbe_turn_off()
228 		val = gbe->frm_inhwctrl;  in gbe_turn_off()
232 			val = gbe->ovr_inhwctrl;  in gbe_turn_off()
236 				val = gbe->did_inhwctrl;  in gbe_turn_off()
248 	val = gbe->vt_vpixen;  in gbe_turn_off()
252 		val = gbe->vt_xy;  in gbe_turn_off()
262 		val = gbe->vt_xy;  in gbe_turn_off()
274 	gbe->vt_xy = val;  in gbe_turn_off()
277 		val = gbe->vt_xy;  in gbe_turn_off()
287 	val = gbe->dotclock;  in gbe_turn_off()
289 	gbe->dotclock = val;  in gbe_turn_off()
292 		val = gbe->dotclock;  in gbe_turn_off()
302 	val = gbe->frm_size_tile;  in gbe_turn_off()
304 	gbe->frm_size_tile = val;  in gbe_turn_off()
306 	gbe->frm_size_tile = val;  in gbe_turn_off()
318 		val = gbe->vt_xy;  in gbe_turn_on()
324 	val = gbe->dotclock;  in gbe_turn_on()
326 	gbe->dotclock = val;  in gbe_turn_on()
329 		val = gbe->dotclock;  in gbe_turn_on()
341 	gbe->vt_xy = val;  in gbe_turn_on()
344 		val = gbe->vt_xy;  in gbe_turn_on()
354 	val = gbe->frm_control;  in gbe_turn_on()
356 	gbe->frm_control = val;  in gbe_turn_on()
359 		val = gbe->frm_inhwctrl;  in gbe_turn_on()
376 		for (j = 0; j < 1000 && gbe->cm_fifo >= 63; j++)  in gbe_loadcmap()
381 		gbe->cmap[i] = gbe_cmap[i];  in gbe_loadcmap()
420 	gbe->vt_flags = outputVal;  in gbefb_setup_flatpanel()
434 	gbe->fp_de = outputVal;  in gbefb_setup_flatpanel()
437 	gbe->fp_hdrv = outputVal;  in gbefb_setup_flatpanel()
441 	gbe->fp_vdrv = outputVal;  in gbefb_setup_flatpanel()
468 	 * GBE crystal runs at 20Mhz or 27Mhz  in compute_gbe_timing()
542 	gbe->dotclock = val;  in gbe_set_timing_info()
549 	gbe->vt_xymax = val;  in gbe_set_timing_info()
555 	gbe->vt_vsync = val;  in gbe_set_timing_info()
559 	gbe->vt_hsync = val;  in gbe_set_timing_info()
563 	gbe->vt_vblank = val;  in gbe_set_timing_info()
569 	gbe->vt_hblank = val;  in gbe_set_timing_info()
575 	gbe->vt_vcmap = val;  in gbe_set_timing_info()
579 	gbe->vt_hcmap = val;  in gbe_set_timing_info()
596 	gbe->did_start_xy = val;  in gbe_set_timing_info()
607 	gbe->crs_start_xy = val;  in gbe_set_timing_info()
612 	gbe->vc_start_xy = val;  in gbe_set_timing_info()
623 	gbe->vt_hpixen = val;  in gbe_set_timing_info()
628 	gbe->vt_vpixen = val;  in gbe_set_timing_info()
633 	gbe->vt_flags = val;  in gbe_set_timing_info()
657 	/* turn off GBE */  in gbefb_set_par()
682 		gbe->mode_regs[i] = val;  in gbefb_set_par()
685 	gbe->vt_intr01 = 0xffffffff;  in gbefb_set_par()
686 	gbe->vt_intr23 = 0xffffffff;  in gbefb_set_par()
689 	   The GBE hardware uses a tiled memory to screen mapping. Tiles are  in gbefb_set_par()
712 	   really convenient. In order to support linear addressing, the GBE  in gbefb_set_par()
718 	   framebuffer as a continuous virtual memory. The GBE tile table is  in gbefb_set_par()
721 	   GBE -> tile list    framebuffer           TLB   <------------ CPU  in gbefb_set_par()
727 	   The GBE hardware is then told that the buffer is 512*tweaked_height,  in gbefb_set_par()
729 	   Thus the GBE hardware will scan the first tile, filing the first 64k  in gbefb_set_par()
751 	/* Tell gbe about the tiles table location */  in gbefb_set_par()
759 	gbe->frm_control = val;  in gbefb_set_par()
784 	gbe->frm_size_tile = val;  in gbefb_set_par()
791 	gbe->frm_size_pixel = val;  in gbefb_set_par()
794 	gbe->did_control = 0;  in gbefb_set_par()
795 	gbe->ovr_width_tile = 0;  in gbefb_set_par()
798 	gbe->crs_ctl = 0;  in gbefb_set_par()
800 	/* Turn on GBE */  in gbefb_set_par()
806 		gbe->gmap[i] = (i << 24) | (i << 16) | (i << 8);  in gbefb_set_par()
821 	strcpy(fix->id, "SGI GBE");  in gbefb_encode_fix()
865 			for (i = 0; i < 1000 && gbe->cm_fifo >= 63; i++)  in gbefb_setcolreg()
871 			gbe->cmap[regno] = gbe_cmap[regno];  in gbefb_setcolreg()
1140 	if (!request_mem_region(GBE_BASE, sizeof(struct sgi_gbe), "GBE")) {  in gbefb_probe()
1146 	gbe = (struct sgi_gbe *) devm_ioremap(&p_dev->dev, GBE_BASE,  in gbefb_probe()
1148 	if (!gbe) {  in gbefb_probe()
1153 	gbe_revision = gbe->ctrlstat & 15;  in gbefb_probe()
1202 	/* reset GBE */  in gbefb_probe()