xref: /freebsd/sys/arm/ti/am335x/am335x_lcd_syscons.c (revision 9f23cbd6cae82fd77edfad7173432fa8dccd0a95)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2013 Oleksandr Tymoshenko <gonzo@freebsd.org>
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30 
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/bus.h>
34 #include <sys/conf.h>
35 #include <sys/endian.h>
36 #include <sys/kernel.h>
37 #include <sys/lock.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
40 #include <sys/mutex.h>
41 #include <sys/resource.h>
42 #include <sys/rman.h>
43 #include <sys/fbio.h>
44 #include <sys/consio.h>
45 
46 #include <sys/kdb.h>
47 
48 #include <machine/bus.h>
49 #include <machine/resource.h>
50 #include <machine/intr.h>
51 
52 #include <dev/ofw/ofw_bus.h>
53 #include <dev/ofw/ofw_bus_subr.h>
54 
55 #include <dev/fb/fbreg.h>
56 #include <dev/syscons/syscons.h>
57 
58 #include "am335x_lcd.h"
59 
60 struct video_adapter_softc {
61 	/* Videoadpater part */
62 	video_adapter_t	va;
63 	int		console;
64 
65 	intptr_t	fb_addr;
66 	intptr_t	fb_paddr;
67 	unsigned int	fb_size;
68 
69 	unsigned int	height;
70 	unsigned int	width;
71 	unsigned int	depth;
72 	unsigned int	stride;
73 
74 	unsigned int	xmargin;
75 	unsigned int	ymargin;
76 
77 	unsigned char	*font;
78 	int		initialized;
79 };
80 
81 struct argb {
82 	uint8_t		a;
83 	uint8_t		r;
84 	uint8_t		g;
85 	uint8_t		b;
86 };
87 
88 static struct argb am335x_syscons_palette[16] = {
89 	{0x00, 0x00, 0x00, 0x00},
90 	{0x00, 0x00, 0x00, 0xaa},
91 	{0x00, 0x00, 0xaa, 0x00},
92 	{0x00, 0x00, 0xaa, 0xaa},
93 	{0x00, 0xaa, 0x00, 0x00},
94 	{0x00, 0xaa, 0x00, 0xaa},
95 	{0x00, 0xaa, 0x55, 0x00},
96 	{0x00, 0xaa, 0xaa, 0xaa},
97 	{0x00, 0x55, 0x55, 0x55},
98 	{0x00, 0x55, 0x55, 0xff},
99 	{0x00, 0x55, 0xff, 0x55},
100 	{0x00, 0x55, 0xff, 0xff},
101 	{0x00, 0xff, 0x55, 0x55},
102 	{0x00, 0xff, 0x55, 0xff},
103 	{0x00, 0xff, 0xff, 0x55},
104 	{0x00, 0xff, 0xff, 0xff}
105 };
106 
107 /* mouse pointer from dev/syscons/scgfbrndr.c */
108 static u_char mouse_pointer[16] = {
109         0x00, 0x40, 0x60, 0x70, 0x78, 0x7c, 0x7e, 0x68,
110         0x0c, 0x0c, 0x06, 0x06, 0x00, 0x00, 0x00, 0x00
111 };
112 
113 #define	AM335X_FONT_HEIGHT	16
114 
115 #define FB_WIDTH		640
116 #define FB_HEIGHT		480
117 #define FB_DEPTH		24
118 
119 static struct video_adapter_softc va_softc;
120 
121 static int am335x_syscons_configure(int flags);
122 
123 /*
124  * Video driver routines and glue.
125  */
126 static vi_probe_t		am335x_syscons_probe;
127 static vi_init_t		am335x_syscons_init;
128 static vi_get_info_t		am335x_syscons_get_info;
129 static vi_query_mode_t		am335x_syscons_query_mode;
130 static vi_set_mode_t		am335x_syscons_set_mode;
131 static vi_save_font_t		am335x_syscons_save_font;
132 static vi_load_font_t		am335x_syscons_load_font;
133 static vi_show_font_t		am335x_syscons_show_font;
134 static vi_save_palette_t	am335x_syscons_save_palette;
135 static vi_load_palette_t	am335x_syscons_load_palette;
136 static vi_set_border_t		am335x_syscons_set_border;
137 static vi_save_state_t		am335x_syscons_save_state;
138 static vi_load_state_t		am335x_syscons_load_state;
139 static vi_set_win_org_t		am335x_syscons_set_win_org;
140 static vi_read_hw_cursor_t	am335x_syscons_read_hw_cursor;
141 static vi_set_hw_cursor_t	am335x_syscons_set_hw_cursor;
142 static vi_set_hw_cursor_shape_t	am335x_syscons_set_hw_cursor_shape;
143 static vi_blank_display_t	am335x_syscons_blank_display;
144 static vi_mmap_t		am335x_syscons_mmap;
145 static vi_ioctl_t		am335x_syscons_ioctl;
146 static vi_clear_t		am335x_syscons_clear;
147 static vi_fill_rect_t		am335x_syscons_fill_rect;
148 static vi_bitblt_t		am335x_syscons_bitblt;
149 static vi_diag_t		am335x_syscons_diag;
150 static vi_save_cursor_palette_t	am335x_syscons_save_cursor_palette;
151 static vi_load_cursor_palette_t	am335x_syscons_load_cursor_palette;
152 static vi_copy_t		am335x_syscons_copy;
153 static vi_putp_t		am335x_syscons_putp;
154 static vi_putc_t		am335x_syscons_putc;
155 static vi_puts_t		am335x_syscons_puts;
156 static vi_putm_t		am335x_syscons_putm;
157 
158 static video_switch_t am335x_sysconsvidsw = {
159 	.probe			= am335x_syscons_probe,
160 	.init			= am335x_syscons_init,
161 	.get_info		= am335x_syscons_get_info,
162 	.query_mode		= am335x_syscons_query_mode,
163 	.set_mode		= am335x_syscons_set_mode,
164 	.save_font		= am335x_syscons_save_font,
165 	.load_font		= am335x_syscons_load_font,
166 	.show_font		= am335x_syscons_show_font,
167 	.save_palette		= am335x_syscons_save_palette,
168 	.load_palette		= am335x_syscons_load_palette,
169 	.set_border		= am335x_syscons_set_border,
170 	.save_state		= am335x_syscons_save_state,
171 	.load_state		= am335x_syscons_load_state,
172 	.set_win_org		= am335x_syscons_set_win_org,
173 	.read_hw_cursor		= am335x_syscons_read_hw_cursor,
174 	.set_hw_cursor		= am335x_syscons_set_hw_cursor,
175 	.set_hw_cursor_shape	= am335x_syscons_set_hw_cursor_shape,
176 	.blank_display		= am335x_syscons_blank_display,
177 	.mmap			= am335x_syscons_mmap,
178 	.ioctl			= am335x_syscons_ioctl,
179 	.clear			= am335x_syscons_clear,
180 	.fill_rect		= am335x_syscons_fill_rect,
181 	.bitblt			= am335x_syscons_bitblt,
182 	.diag			= am335x_syscons_diag,
183 	.save_cursor_palette	= am335x_syscons_save_cursor_palette,
184 	.load_cursor_palette	= am335x_syscons_load_cursor_palette,
185 	.copy			= am335x_syscons_copy,
186 	.putp			= am335x_syscons_putp,
187 	.putc			= am335x_syscons_putc,
188 	.puts			= am335x_syscons_puts,
189 	.putm			= am335x_syscons_putm,
190 };
191 
192 VIDEO_DRIVER(am335x_syscons, am335x_sysconsvidsw, am335x_syscons_configure);
193 
194 static vr_init_t am335x_rend_init;
195 static vr_clear_t am335x_rend_clear;
196 static vr_draw_border_t am335x_rend_draw_border;
197 static vr_draw_t am335x_rend_draw;
198 static vr_set_cursor_t am335x_rend_set_cursor;
199 static vr_draw_cursor_t am335x_rend_draw_cursor;
200 static vr_blink_cursor_t am335x_rend_blink_cursor;
201 static vr_set_mouse_t am335x_rend_set_mouse;
202 static vr_draw_mouse_t am335x_rend_draw_mouse;
203 
204 /*
205  * We use our own renderer; this is because we must emulate a hardware
206  * cursor.
207  */
208 static sc_rndr_sw_t am335x_rend = {
209 	am335x_rend_init,
210 	am335x_rend_clear,
211 	am335x_rend_draw_border,
212 	am335x_rend_draw,
213 	am335x_rend_set_cursor,
214 	am335x_rend_draw_cursor,
215 	am335x_rend_blink_cursor,
216 	am335x_rend_set_mouse,
217 	am335x_rend_draw_mouse
218 };
219 
220 RENDERER(am335x_syscons, 0, am335x_rend, gfb_set);
221 RENDERER_MODULE(am335x_syscons, gfb_set);
222 
223 static void
224 am335x_rend_init(scr_stat* scp)
225 {
226 }
227 
228 static void
229 am335x_rend_clear(scr_stat* scp, int c, int attr)
230 {
231 }
232 
233 static void
234 am335x_rend_draw_border(scr_stat* scp, int color)
235 {
236 }
237 
238 static void
239 am335x_rend_draw(scr_stat* scp, int from, int count, int flip)
240 {
241 	video_adapter_t* adp = scp->sc->adp;
242 	int i, c, a;
243 
244 	if (!flip) {
245 		/* Normal printing */
246 		vidd_puts(adp, from, (uint16_t*)sc_vtb_pointer(&scp->vtb, from), count);
247 	} else {
248 		/* This is for selections and such: invert the color attribute */
249 		for (i = count; i-- > 0; ++from) {
250 			c = sc_vtb_getc(&scp->vtb, from);
251 			a = sc_vtb_geta(&scp->vtb, from) >> 8;
252 			vidd_putc(adp, from, c, (a >> 4) | ((a & 0xf) << 4));
253 		}
254 	}
255 }
256 
257 static void
258 am335x_rend_set_cursor(scr_stat* scp, int base, int height, int blink)
259 {
260 }
261 
262 static void
263 am335x_rend_draw_cursor(scr_stat* scp, int off, int blink, int on, int flip)
264 {
265 	video_adapter_t* adp = scp->sc->adp;
266 	struct video_adapter_softc *sc;
267 	int row, col;
268 	uint8_t *addr;
269 	int i, j, bytes;
270 
271 	sc = (struct video_adapter_softc *)adp;
272 
273 	if (scp->curs_attr.height <= 0)
274 		return;
275 
276 	if (sc->fb_addr == 0)
277 		return;
278 
279 	if (off >= adp->va_info.vi_width * adp->va_info.vi_height)
280 		return;
281 
282 	/* calculate the coordinates in the video buffer */
283 	row = (off / adp->va_info.vi_width) * adp->va_info.vi_cheight;
284 	col = (off % adp->va_info.vi_width) * adp->va_info.vi_cwidth;
285 
286 	addr = (uint8_t *)sc->fb_addr
287 	    + (row + sc->ymargin)*(sc->stride)
288 	    + (sc->depth/8) * (col + sc->xmargin);
289 
290 	bytes = sc->depth/8;
291 
292 	/* our cursor consists of simply inverting the char under it */
293 	for (i = 0; i < adp->va_info.vi_cheight; i++) {
294 		for (j = 0; j < adp->va_info.vi_cwidth; j++) {
295 			switch (sc->depth) {
296 			case 32:
297 			case 24:
298 				addr[bytes*j + 2] ^= 0xff;
299 				/* FALLTHROUGH */
300 			case 16:
301 				addr[bytes*j + 1] ^= 0xff;
302 				addr[bytes*j] ^= 0xff;
303 				break;
304 			default:
305 				break;
306 			}
307 		}
308 
309 		addr += sc->stride;
310 	}
311 }
312 
313 static void
314 am335x_rend_blink_cursor(scr_stat* scp, int at, int flip)
315 {
316 }
317 
318 static void
319 am335x_rend_set_mouse(scr_stat* scp)
320 {
321 }
322 
323 static void
324 am335x_rend_draw_mouse(scr_stat* scp, int x, int y, int on)
325 {
326 	vidd_putm(scp->sc->adp, x, y, mouse_pointer, 0xffffffff, 16, 8);
327 }
328 
329 static uint16_t am335x_syscons_static_window[ROW*COL];
330 extern u_char dflt_font_16[];
331 
332 /*
333  * Update videoadapter settings after changing resolution
334  */
335 static void
336 am335x_syscons_update_margins(video_adapter_t *adp)
337 {
338 	struct video_adapter_softc *sc;
339 	video_info_t *vi;
340 
341 	sc = (struct video_adapter_softc *)adp;
342 	vi = &adp->va_info;
343 
344 	sc->xmargin = (sc->width - (vi->vi_width * vi->vi_cwidth)) / 2;
345 	sc->ymargin = (sc->height - (vi->vi_height * vi->vi_cheight))/2;
346 }
347 
348 static phandle_t
349 am335x_syscons_find_panel_node(phandle_t start)
350 {
351 	phandle_t child;
352 	phandle_t result;
353 
354 	for (child = OF_child(start); child != 0; child = OF_peer(child)) {
355 		if (ofw_bus_node_is_compatible(child, "ti,am335x-lcd"))
356 			return (child);
357 		if ((result = am335x_syscons_find_panel_node(child)))
358 			return (result);
359 	}
360 
361 	return (0);
362 }
363 
364 static int
365 am335x_syscons_configure(int flags)
366 {
367 	struct video_adapter_softc *va_sc;
368 
369 	va_sc = &va_softc;
370 	phandle_t display, root;
371 	pcell_t cell;
372 
373 	if (va_sc->initialized)
374 		return (0);
375 
376 	va_sc->width = 0;
377 	va_sc->height = 0;
378 
379 	/*
380 	 * It seems there is no way to let syscons framework know
381 	 * that framebuffer resolution has changed. So just try
382 	 * to fetch data from FDT and go with defaults if failed
383 	 */
384 	root = OF_finddevice("/");
385 	if ((root != -1) &&
386 	    (display = am335x_syscons_find_panel_node(root))) {
387 		if ((OF_getencprop(display, "panel_width", &cell,
388 		    sizeof(cell))) > 0)
389 			va_sc->width = cell;
390 
391 		if ((OF_getencprop(display, "panel_height", &cell,
392 		    sizeof(cell))) > 0)
393 			va_sc->height = cell;
394 	}
395 
396 	if (va_sc->width == 0)
397 		va_sc->width = FB_WIDTH;
398 	if (va_sc->height == 0)
399 		va_sc->height = FB_HEIGHT;
400 
401 	am335x_syscons_init(0, &va_sc->va, 0);
402 
403 	va_sc->initialized = 1;
404 
405 	return (0);
406 }
407 
408 static int
409 am335x_syscons_probe(int unit, video_adapter_t **adp, void *arg, int flags)
410 {
411 
412 	return (0);
413 }
414 
415 static int
416 am335x_syscons_init(int unit, video_adapter_t *adp, int flags)
417 {
418 	struct video_adapter_softc *sc;
419 	video_info_t *vi;
420 
421 	sc = (struct video_adapter_softc *)adp;
422 	vi = &adp->va_info;
423 
424 	vid_init_struct(adp, "am335x_syscons", -1, unit);
425 
426 	sc->font = dflt_font_16;
427 	vi->vi_cheight = AM335X_FONT_HEIGHT;
428 	vi->vi_cwidth = 8;
429 
430 	vi->vi_width = sc->width/8;
431 	vi->vi_height = sc->height/vi->vi_cheight;
432 
433 	/*
434 	 * Clamp width/height to syscons maximums
435 	 */
436 	if (vi->vi_width > COL)
437 		vi->vi_width = COL;
438 	if (vi->vi_height > ROW)
439 		vi->vi_height = ROW;
440 
441 	sc->xmargin = (sc->width - (vi->vi_width * vi->vi_cwidth)) / 2;
442 	sc->ymargin = (sc->height - (vi->vi_height * vi->vi_cheight))/2;
443 
444 	adp->va_window = (vm_offset_t) am335x_syscons_static_window;
445 	adp->va_flags |= V_ADP_FONT /* | V_ADP_COLOR | V_ADP_MODECHANGE */;
446 
447 	vid_register(&sc->va);
448 
449 	return (0);
450 }
451 
452 static int
453 am335x_syscons_get_info(video_adapter_t *adp, int mode, video_info_t *info)
454 {
455 	bcopy(&adp->va_info, info, sizeof(*info));
456 	return (0);
457 }
458 
459 static int
460 am335x_syscons_query_mode(video_adapter_t *adp, video_info_t *info)
461 {
462 	return (0);
463 }
464 
465 static int
466 am335x_syscons_set_mode(video_adapter_t *adp, int mode)
467 {
468 	return (0);
469 }
470 
471 static int
472 am335x_syscons_save_font(video_adapter_t *adp, int page, int size, int width,
473     u_char *data, int c, int count)
474 {
475 	return (0);
476 }
477 
478 static int
479 am335x_syscons_load_font(video_adapter_t *adp, int page, int size, int width,
480     u_char *data, int c, int count)
481 {
482 	struct video_adapter_softc *sc = (struct video_adapter_softc *)adp;
483 
484 	sc->font = data;
485 
486 	return (0);
487 }
488 
489 static int
490 am335x_syscons_show_font(video_adapter_t *adp, int page)
491 {
492 	return (0);
493 }
494 
495 static int
496 am335x_syscons_save_palette(video_adapter_t *adp, u_char *palette)
497 {
498 	return (0);
499 }
500 
501 static int
502 am335x_syscons_load_palette(video_adapter_t *adp, u_char *palette)
503 {
504 	return (0);
505 }
506 
507 static int
508 am335x_syscons_set_border(video_adapter_t *adp, int border)
509 {
510 	return (am335x_syscons_blank_display(adp, border));
511 }
512 
513 static int
514 am335x_syscons_save_state(video_adapter_t *adp, void *p, size_t size)
515 {
516 	return (0);
517 }
518 
519 static int
520 am335x_syscons_load_state(video_adapter_t *adp, void *p)
521 {
522 	return (0);
523 }
524 
525 static int
526 am335x_syscons_set_win_org(video_adapter_t *adp, off_t offset)
527 {
528 	return (0);
529 }
530 
531 static int
532 am335x_syscons_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
533 {
534 	*col = *row = 0;
535 
536 	return (0);
537 }
538 
539 static int
540 am335x_syscons_set_hw_cursor(video_adapter_t *adp, int col, int row)
541 {
542 	return (0);
543 }
544 
545 static int
546 am335x_syscons_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
547     int celsize, int blink)
548 {
549 	return (0);
550 }
551 
552 static int
553 am335x_syscons_blank_display(video_adapter_t *adp, int mode)
554 {
555 
556 	struct video_adapter_softc *sc;
557 
558 	sc = (struct video_adapter_softc *)adp;
559 	if (sc && sc->fb_addr)
560 		memset((void*)sc->fb_addr, 0, sc->fb_size);
561 
562 	return (0);
563 }
564 
565 static int
566 am335x_syscons_mmap(video_adapter_t *adp, vm_ooffset_t offset, vm_paddr_t *paddr,
567     int prot, vm_memattr_t *memattr)
568 {
569 	struct video_adapter_softc *sc;
570 
571 	sc = (struct video_adapter_softc *)adp;
572 
573 	/*
574 	 * This might be a legacy VGA mem request: if so, just point it at the
575 	 * framebuffer, since it shouldn't be touched
576 	 */
577 	if (offset < sc->stride*sc->height) {
578 		*paddr = sc->fb_paddr + offset;
579 		return (0);
580 	}
581 
582 	return (EINVAL);
583 }
584 
585 static int
586 am335x_syscons_ioctl(video_adapter_t *adp, u_long cmd, caddr_t data)
587 {
588 	struct video_adapter_softc *sc;
589 	struct fbtype *fb;
590 
591 	sc = (struct video_adapter_softc *)adp;
592 
593 	switch (cmd) {
594 	case FBIOGTYPE:
595 		fb = (struct fbtype *)data;
596 		fb->fb_type = FBTYPE_PCIMISC;
597 		fb->fb_height = sc->height;
598 		fb->fb_width = sc->width;
599 		fb->fb_depth = sc->depth;
600 		if (sc->depth <= 1 || sc->depth > 8)
601 			fb->fb_cmsize = 0;
602 		else
603 			fb->fb_cmsize = 1 << sc->depth;
604 		fb->fb_size = sc->fb_size;
605 		break;
606 	default:
607 		return (fb_commonioctl(adp, cmd, data));
608 	}
609 
610 	return (0);
611 }
612 
613 static int
614 am335x_syscons_clear(video_adapter_t *adp)
615 {
616 
617 	return (am335x_syscons_blank_display(adp, 0));
618 }
619 
620 static int
621 am335x_syscons_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
622 {
623 
624 	return (0);
625 }
626 
627 static int
628 am335x_syscons_bitblt(video_adapter_t *adp, ...)
629 {
630 
631 	return (0);
632 }
633 
634 static int
635 am335x_syscons_diag(video_adapter_t *adp, int level)
636 {
637 
638 	return (0);
639 }
640 
641 static int
642 am335x_syscons_save_cursor_palette(video_adapter_t *adp, u_char *palette)
643 {
644 
645 	return (0);
646 }
647 
648 static int
649 am335x_syscons_load_cursor_palette(video_adapter_t *adp, u_char *palette)
650 {
651 
652 	return (0);
653 }
654 
655 static int
656 am335x_syscons_copy(video_adapter_t *adp, vm_offset_t src, vm_offset_t dst, int n)
657 {
658 
659 	return (0);
660 }
661 
662 static int
663 am335x_syscons_putp(video_adapter_t *adp, vm_offset_t off, uint32_t p, uint32_t a,
664     int size, int bpp, int bit_ltor, int byte_ltor)
665 {
666 
667 	return (0);
668 }
669 
670 static int
671 am335x_syscons_putc(video_adapter_t *adp, vm_offset_t off, uint8_t c, uint8_t a)
672 {
673 	struct video_adapter_softc *sc;
674 	int row;
675 	int col;
676 	int i, j, k;
677 	uint8_t *addr;
678 	u_char *p;
679 	uint8_t fg, bg, color;
680 	uint16_t rgb;
681 
682 	sc = (struct video_adapter_softc *)adp;
683 
684 	if (sc->fb_addr == 0)
685 		return (0);
686 
687 	row = (off / adp->va_info.vi_width) * adp->va_info.vi_cheight;
688 	col = (off % adp->va_info.vi_width) * adp->va_info.vi_cwidth;
689 	p = sc->font + c*AM335X_FONT_HEIGHT;
690 	addr = (uint8_t *)sc->fb_addr
691 	    + (row + sc->ymargin)*(sc->stride)
692 	    + (sc->depth/8) * (col + sc->xmargin);
693 
694 	fg = a & 0xf ;
695 	bg = (a >> 4) & 0xf;
696 
697 	for (i = 0; i < AM335X_FONT_HEIGHT; i++) {
698 		for (j = 0, k = 7; j < 8; j++, k--) {
699 			if ((p[i] & (1 << k)) == 0)
700 				color = bg;
701 			else
702 				color = fg;
703 
704 			switch (sc->depth) {
705 			case 32:
706 				addr[4*j+0] = am335x_syscons_palette[color].r;
707 				addr[4*j+1] = am335x_syscons_palette[color].g;
708 				addr[4*j+2] = am335x_syscons_palette[color].b;
709 				addr[4*j+3] = am335x_syscons_palette[color].a;
710 				break;
711 			case 24:
712 				addr[3*j] = am335x_syscons_palette[color].r;
713 				addr[3*j+1] = am335x_syscons_palette[color].g;
714 				addr[3*j+2] = am335x_syscons_palette[color].b;
715 				break;
716 			case 16:
717 				rgb = (am335x_syscons_palette[color].r >> 3) << 11;
718 				rgb |= (am335x_syscons_palette[color].g >> 2) << 5;
719 				rgb |= (am335x_syscons_palette[color].b >> 3);
720 				addr[2*j] = rgb & 0xff;
721 				addr[2*j + 1] = (rgb >> 8) & 0xff;
722 			default:
723 				/* Not supported yet */
724 				break;
725 			}
726 		}
727 
728 		addr += (sc->stride);
729 	}
730 
731         return (0);
732 }
733 
734 static int
735 am335x_syscons_puts(video_adapter_t *adp, vm_offset_t off, u_int16_t *s, int len)
736 {
737 	int i;
738 
739 	for (i = 0; i < len; i++)
740 		am335x_syscons_putc(adp, off + i, s[i] & 0xff, (s[i] & 0xff00) >> 8);
741 
742 	return (0);
743 }
744 
745 static int
746 am335x_syscons_putm(video_adapter_t *adp, int x, int y, uint8_t *pixel_image,
747     uint32_t pixel_mask, int size, int width)
748 {
749 
750 	return (0);
751 }
752 
753 /* Initialization function */
754 int am335x_lcd_syscons_setup(vm_offset_t vaddr, vm_paddr_t paddr,
755     struct panel_info *panel)
756 {
757 	struct video_adapter_softc *va_sc = &va_softc;
758 
759 	va_sc->fb_addr = vaddr;
760 	va_sc->fb_paddr = paddr;
761 	va_sc->depth = panel->bpp;
762 	va_sc->stride = panel->bpp*panel->panel_width/8;
763 
764 	va_sc->width = panel->panel_width;
765 	va_sc->height = panel->panel_height;
766 	va_sc->fb_size = va_sc->width * va_sc->height
767 	    * va_sc->depth/8;
768 	am335x_syscons_update_margins(&va_sc->va);
769 
770 	return (0);
771 }
772