xref: /freebsd/sys/arm/ti/am335x/am335x_lcd_syscons.c (revision 9268022b74279434ed6300244e3f977e56a8ceb5)
1 /*-
2  * Copyright (c) 2013 Oleksandr Tymoshenko <gonzo@freebsd.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
28 
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/bus.h>
32 #include <sys/conf.h>
33 #include <sys/endian.h>
34 #include <sys/kernel.h>
35 #include <sys/lock.h>
36 #include <sys/malloc.h>
37 #include <sys/module.h>
38 #include <sys/mutex.h>
39 #include <sys/resource.h>
40 #include <sys/rman.h>
41 #include <sys/fbio.h>
42 #include <sys/consio.h>
43 
44 #include <sys/kdb.h>
45 
46 #include <machine/bus.h>
47 #include <machine/cpu.h>
48 #include <machine/cpufunc.h>
49 #include <machine/resource.h>
50 #include <machine/intr.h>
51 
52 #include <dev/fdt/fdt_common.h>
53 #include <dev/ofw/ofw_bus.h>
54 #include <dev/ofw/ofw_bus_subr.h>
55 
56 #include <dev/fb/fbreg.h>
57 #include <dev/syscons/syscons.h>
58 
59 #include "am335x_lcd.h"
60 
61 struct video_adapter_softc {
62 	/* Videoadpater part */
63 	video_adapter_t	va;
64 	int		console;
65 
66 	intptr_t	fb_addr;
67 	intptr_t	fb_paddr;
68 	unsigned int	fb_size;
69 
70 	unsigned int	height;
71 	unsigned int	width;
72 	unsigned int	depth;
73 	unsigned int	stride;
74 
75 	unsigned int	xmargin;
76 	unsigned int	ymargin;
77 
78 	unsigned char	*font;
79 	int		initialized;
80 };
81 
82 struct argb {
83 	uint8_t		a;
84 	uint8_t		r;
85 	uint8_t		g;
86 	uint8_t		b;
87 };
88 
89 static struct argb am335x_syscons_palette[16] = {
90 	{0x00, 0x00, 0x00, 0x00},
91 	{0x00, 0x00, 0x00, 0xaa},
92 	{0x00, 0x00, 0xaa, 0x00},
93 	{0x00, 0x00, 0xaa, 0xaa},
94 	{0x00, 0xaa, 0x00, 0x00},
95 	{0x00, 0xaa, 0x00, 0xaa},
96 	{0x00, 0xaa, 0x55, 0x00},
97 	{0x00, 0xaa, 0xaa, 0xaa},
98 	{0x00, 0x55, 0x55, 0x55},
99 	{0x00, 0x55, 0x55, 0xff},
100 	{0x00, 0x55, 0xff, 0x55},
101 	{0x00, 0x55, 0xff, 0xff},
102 	{0x00, 0xff, 0x55, 0x55},
103 	{0x00, 0xff, 0x55, 0xff},
104 	{0x00, 0xff, 0xff, 0x55},
105 	{0x00, 0xff, 0xff, 0xff}
106 };
107 
108 /* mouse pointer from dev/syscons/scgfbrndr.c */
109 static u_char mouse_pointer[16] = {
110         0x00, 0x40, 0x60, 0x70, 0x78, 0x7c, 0x7e, 0x68,
111         0x0c, 0x0c, 0x06, 0x06, 0x00, 0x00, 0x00, 0x00
112 };
113 
114 #define	AM335X_FONT_HEIGHT	16
115 
116 #define FB_WIDTH		640
117 #define FB_HEIGHT		480
118 #define FB_DEPTH		24
119 
120 static struct video_adapter_softc va_softc;
121 
122 static int am335x_syscons_configure(int flags);
123 
124 /*
125  * Video driver routines and glue.
126  */
127 static vi_probe_t		am335x_syscons_probe;
128 static vi_init_t		am335x_syscons_init;
129 static vi_get_info_t		am335x_syscons_get_info;
130 static vi_query_mode_t		am335x_syscons_query_mode;
131 static vi_set_mode_t		am335x_syscons_set_mode;
132 static vi_save_font_t		am335x_syscons_save_font;
133 static vi_load_font_t		am335x_syscons_load_font;
134 static vi_show_font_t		am335x_syscons_show_font;
135 static vi_save_palette_t	am335x_syscons_save_palette;
136 static vi_load_palette_t	am335x_syscons_load_palette;
137 static vi_set_border_t		am335x_syscons_set_border;
138 static vi_save_state_t		am335x_syscons_save_state;
139 static vi_load_state_t		am335x_syscons_load_state;
140 static vi_set_win_org_t		am335x_syscons_set_win_org;
141 static vi_read_hw_cursor_t	am335x_syscons_read_hw_cursor;
142 static vi_set_hw_cursor_t	am335x_syscons_set_hw_cursor;
143 static vi_set_hw_cursor_shape_t	am335x_syscons_set_hw_cursor_shape;
144 static vi_blank_display_t	am335x_syscons_blank_display;
145 static vi_mmap_t		am335x_syscons_mmap;
146 static vi_ioctl_t		am335x_syscons_ioctl;
147 static vi_clear_t		am335x_syscons_clear;
148 static vi_fill_rect_t		am335x_syscons_fill_rect;
149 static vi_bitblt_t		am335x_syscons_bitblt;
150 static vi_diag_t		am335x_syscons_diag;
151 static vi_save_cursor_palette_t	am335x_syscons_save_cursor_palette;
152 static vi_load_cursor_palette_t	am335x_syscons_load_cursor_palette;
153 static vi_copy_t		am335x_syscons_copy;
154 static vi_putp_t		am335x_syscons_putp;
155 static vi_putc_t		am335x_syscons_putc;
156 static vi_puts_t		am335x_syscons_puts;
157 static vi_putm_t		am335x_syscons_putm;
158 
159 static video_switch_t am335x_sysconsvidsw = {
160 	.probe			= am335x_syscons_probe,
161 	.init			= am335x_syscons_init,
162 	.get_info		= am335x_syscons_get_info,
163 	.query_mode		= am335x_syscons_query_mode,
164 	.set_mode		= am335x_syscons_set_mode,
165 	.save_font		= am335x_syscons_save_font,
166 	.load_font		= am335x_syscons_load_font,
167 	.show_font		= am335x_syscons_show_font,
168 	.save_palette		= am335x_syscons_save_palette,
169 	.load_palette		= am335x_syscons_load_palette,
170 	.set_border		= am335x_syscons_set_border,
171 	.save_state		= am335x_syscons_save_state,
172 	.load_state		= am335x_syscons_load_state,
173 	.set_win_org		= am335x_syscons_set_win_org,
174 	.read_hw_cursor		= am335x_syscons_read_hw_cursor,
175 	.set_hw_cursor		= am335x_syscons_set_hw_cursor,
176 	.set_hw_cursor_shape	= am335x_syscons_set_hw_cursor_shape,
177 	.blank_display		= am335x_syscons_blank_display,
178 	.mmap			= am335x_syscons_mmap,
179 	.ioctl			= am335x_syscons_ioctl,
180 	.clear			= am335x_syscons_clear,
181 	.fill_rect		= am335x_syscons_fill_rect,
182 	.bitblt			= am335x_syscons_bitblt,
183 	.diag			= am335x_syscons_diag,
184 	.save_cursor_palette	= am335x_syscons_save_cursor_palette,
185 	.load_cursor_palette	= am335x_syscons_load_cursor_palette,
186 	.copy			= am335x_syscons_copy,
187 	.putp			= am335x_syscons_putp,
188 	.putc			= am335x_syscons_putc,
189 	.puts			= am335x_syscons_puts,
190 	.putm			= am335x_syscons_putm,
191 };
192 
193 VIDEO_DRIVER(am335x_syscons, am335x_sysconsvidsw, am335x_syscons_configure);
194 
195 static vr_init_t am335x_rend_init;
196 static vr_clear_t am335x_rend_clear;
197 static vr_draw_border_t am335x_rend_draw_border;
198 static vr_draw_t am335x_rend_draw;
199 static vr_set_cursor_t am335x_rend_set_cursor;
200 static vr_draw_cursor_t am335x_rend_draw_cursor;
201 static vr_blink_cursor_t am335x_rend_blink_cursor;
202 static vr_set_mouse_t am335x_rend_set_mouse;
203 static vr_draw_mouse_t am335x_rend_draw_mouse;
204 
205 /*
206  * We use our own renderer; this is because we must emulate a hardware
207  * cursor.
208  */
209 static sc_rndr_sw_t am335x_rend = {
210 	am335x_rend_init,
211 	am335x_rend_clear,
212 	am335x_rend_draw_border,
213 	am335x_rend_draw,
214 	am335x_rend_set_cursor,
215 	am335x_rend_draw_cursor,
216 	am335x_rend_blink_cursor,
217 	am335x_rend_set_mouse,
218 	am335x_rend_draw_mouse
219 };
220 
221 RENDERER(am335x_syscons, 0, am335x_rend, gfb_set);
222 RENDERER_MODULE(am335x_syscons, gfb_set);
223 
224 static void
225 am335x_rend_init(scr_stat* scp)
226 {
227 }
228 
229 static void
230 am335x_rend_clear(scr_stat* scp, int c, int attr)
231 {
232 }
233 
234 static void
235 am335x_rend_draw_border(scr_stat* scp, int color)
236 {
237 }
238 
239 static void
240 am335x_rend_draw(scr_stat* scp, int from, int count, int flip)
241 {
242 	video_adapter_t* adp = scp->sc->adp;
243 	int i, c, a;
244 
245 	if (!flip) {
246 		/* Normal printing */
247 		vidd_puts(adp, from, (uint16_t*)sc_vtb_pointer(&scp->vtb, from), count);
248 	} else {
249 		/* This is for selections and such: invert the color attribute */
250 		for (i = count; i-- > 0; ++from) {
251 			c = sc_vtb_getc(&scp->vtb, from);
252 			a = sc_vtb_geta(&scp->vtb, from) >> 8;
253 			vidd_putc(adp, from, c, (a >> 4) | ((a & 0xf) << 4));
254 		}
255 	}
256 }
257 
258 static void
259 am335x_rend_set_cursor(scr_stat* scp, int base, int height, int blink)
260 {
261 }
262 
263 static void
264 am335x_rend_draw_cursor(scr_stat* scp, int off, int blink, int on, int flip)
265 {
266 	video_adapter_t* adp = scp->sc->adp;
267 	struct video_adapter_softc *sc;
268 	int row, col;
269 	uint8_t *addr;
270 	int i, j, bytes;
271 
272 	sc = (struct video_adapter_softc *)adp;
273 
274 	if (scp->curs_attr.height <= 0)
275 		return;
276 
277 	if (sc->fb_addr == 0)
278 		return;
279 
280 	if (off >= adp->va_info.vi_width * adp->va_info.vi_height)
281 		return;
282 
283 	/* calculate the coordinates in the video buffer */
284 	row = (off / adp->va_info.vi_width) * adp->va_info.vi_cheight;
285 	col = (off % adp->va_info.vi_width) * adp->va_info.vi_cwidth;
286 
287 	addr = (uint8_t *)sc->fb_addr
288 	    + (row + sc->ymargin)*(sc->stride)
289 	    + (sc->depth/8) * (col + sc->xmargin);
290 
291 	bytes = sc->depth/8;
292 
293 	/* our cursor consists of simply inverting the char under it */
294 	for (i = 0; i < adp->va_info.vi_cheight; i++) {
295 		for (j = 0; j < adp->va_info.vi_cwidth; j++) {
296 			switch (sc->depth) {
297 			case 32:
298 			case 24:
299 				addr[bytes*j + 2] ^= 0xff;
300 				/* FALLTHROUGH */
301 			case 16:
302 				addr[bytes*j + 1] ^= 0xff;
303 				addr[bytes*j] ^= 0xff;
304 				break;
305 			default:
306 				break;
307 			}
308 		}
309 
310 		addr += sc->stride;
311 	}
312 }
313 
314 static void
315 am335x_rend_blink_cursor(scr_stat* scp, int at, int flip)
316 {
317 }
318 
319 static void
320 am335x_rend_set_mouse(scr_stat* scp)
321 {
322 }
323 
324 static void
325 am335x_rend_draw_mouse(scr_stat* scp, int x, int y, int on)
326 {
327 	vidd_putm(scp->sc->adp, x, y, mouse_pointer, 0xffffffff, 16, 8);
328 }
329 
330 static uint16_t am335x_syscons_static_window[ROW*COL];
331 extern u_char dflt_font_16[];
332 
333 /*
334  * Update videoadapter settings after changing resolution
335  */
336 static void
337 am335x_syscons_update_margins(video_adapter_t *adp)
338 {
339 	struct video_adapter_softc *sc;
340 	video_info_t *vi;
341 
342 	sc = (struct video_adapter_softc *)adp;
343 	vi = &adp->va_info;
344 
345 	sc->xmargin = (sc->width - (vi->vi_width * vi->vi_cwidth)) / 2;
346 	sc->ymargin = (sc->height - (vi->vi_height * vi->vi_cheight))/2;
347 }
348 
349 static phandle_t
350 am335x_syscons_find_panel_node(phandle_t start)
351 {
352 	phandle_t child;
353 	phandle_t result;
354 
355 	for (child = OF_child(start); child != 0; child = OF_peer(child)) {
356 		if (fdt_is_compatible(child, "ti,am335x-lcd"))
357 			return (child);
358 		if ((result = am335x_syscons_find_panel_node(child)))
359 			return (result);
360 	}
361 
362 	return (0);
363 }
364 
365 static int
366 am335x_syscons_configure(int flags)
367 {
368 	struct video_adapter_softc *va_sc;
369 
370 	va_sc = &va_softc;
371 	phandle_t display, root;
372 	pcell_t cell;
373 
374 	if (va_sc->initialized)
375 		return (0);
376 
377 	va_sc->width = 0;
378 	va_sc->height = 0;
379 
380 	/*
381 	 * It seems there is no way to let syscons framework know
382 	 * that framebuffer resolution has changed. So just try
383 	 * to fetch data from FDT and go with defaults if failed
384 	 */
385 	root = OF_finddevice("/");
386 	if ((root != 0) &&
387 	    (display = am335x_syscons_find_panel_node(root))) {
388 		if ((OF_getprop(display, "panel_width",
389 		    &cell, sizeof(cell))) > 0)
390 			va_sc->width = (int)fdt32_to_cpu(cell);
391 
392 		if ((OF_getprop(display, "panel_height",
393 		    &cell, sizeof(cell))) > 0)
394 			va_sc->height = (int)fdt32_to_cpu(cell);
395 	}
396 
397 	if (va_sc->width == 0)
398 		va_sc->width = FB_WIDTH;
399 	if (va_sc->height == 0)
400 		va_sc->height = FB_HEIGHT;
401 
402 	am335x_syscons_init(0, &va_sc->va, 0);
403 
404 	va_sc->initialized = 1;
405 
406 	return (0);
407 }
408 
409 static int
410 am335x_syscons_probe(int unit, video_adapter_t **adp, void *arg, int flags)
411 {
412 
413 	return (0);
414 }
415 
416 static int
417 am335x_syscons_init(int unit, video_adapter_t *adp, int flags)
418 {
419 	struct video_adapter_softc *sc;
420 	video_info_t *vi;
421 
422 	sc = (struct video_adapter_softc *)adp;
423 	vi = &adp->va_info;
424 
425 	vid_init_struct(adp, "am335x_syscons", -1, unit);
426 
427 	sc->font = dflt_font_16;
428 	vi->vi_cheight = AM335X_FONT_HEIGHT;
429 	vi->vi_cwidth = 8;
430 
431 	vi->vi_width = sc->width/8;
432 	vi->vi_height = sc->height/vi->vi_cheight;
433 
434 	/*
435 	 * Clamp width/height to syscons maximums
436 	 */
437 	if (vi->vi_width > COL)
438 		vi->vi_width = COL;
439 	if (vi->vi_height > ROW)
440 		vi->vi_height = ROW;
441 
442 	sc->xmargin = (sc->width - (vi->vi_width * vi->vi_cwidth)) / 2;
443 	sc->ymargin = (sc->height - (vi->vi_height * vi->vi_cheight))/2;
444 
445 
446 	adp->va_window = (vm_offset_t) am335x_syscons_static_window;
447 	adp->va_flags |= V_ADP_FONT /* | V_ADP_COLOR | V_ADP_MODECHANGE */;
448 
449 	vid_register(&sc->va);
450 
451 	return (0);
452 }
453 
454 static int
455 am335x_syscons_get_info(video_adapter_t *adp, int mode, video_info_t *info)
456 {
457 	bcopy(&adp->va_info, info, sizeof(*info));
458 	return (0);
459 }
460 
461 static int
462 am335x_syscons_query_mode(video_adapter_t *adp, video_info_t *info)
463 {
464 	return (0);
465 }
466 
467 static int
468 am335x_syscons_set_mode(video_adapter_t *adp, int mode)
469 {
470 	return (0);
471 }
472 
473 static int
474 am335x_syscons_save_font(video_adapter_t *adp, int page, int size, int width,
475     u_char *data, int c, int count)
476 {
477 	return (0);
478 }
479 
480 static int
481 am335x_syscons_load_font(video_adapter_t *adp, int page, int size, int width,
482     u_char *data, int c, int count)
483 {
484 	struct video_adapter_softc *sc = (struct video_adapter_softc *)adp;
485 
486 	sc->font = data;
487 
488 	return (0);
489 }
490 
491 static int
492 am335x_syscons_show_font(video_adapter_t *adp, int page)
493 {
494 	return (0);
495 }
496 
497 static int
498 am335x_syscons_save_palette(video_adapter_t *adp, u_char *palette)
499 {
500 	return (0);
501 }
502 
503 static int
504 am335x_syscons_load_palette(video_adapter_t *adp, u_char *palette)
505 {
506 	return (0);
507 }
508 
509 static int
510 am335x_syscons_set_border(video_adapter_t *adp, int border)
511 {
512 	return (am335x_syscons_blank_display(adp, border));
513 }
514 
515 static int
516 am335x_syscons_save_state(video_adapter_t *adp, void *p, size_t size)
517 {
518 	return (0);
519 }
520 
521 static int
522 am335x_syscons_load_state(video_adapter_t *adp, void *p)
523 {
524 	return (0);
525 }
526 
527 static int
528 am335x_syscons_set_win_org(video_adapter_t *adp, off_t offset)
529 {
530 	return (0);
531 }
532 
533 static int
534 am335x_syscons_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
535 {
536 	*col = *row = 0;
537 
538 	return (0);
539 }
540 
541 static int
542 am335x_syscons_set_hw_cursor(video_adapter_t *adp, int col, int row)
543 {
544 	return (0);
545 }
546 
547 static int
548 am335x_syscons_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
549     int celsize, int blink)
550 {
551 	return (0);
552 }
553 
554 static int
555 am335x_syscons_blank_display(video_adapter_t *adp, int mode)
556 {
557 
558 	struct video_adapter_softc *sc;
559 
560 	sc = (struct video_adapter_softc *)adp;
561 	if (sc && sc->fb_addr)
562 		memset((void*)sc->fb_addr, 0, sc->fb_size);
563 
564 	return (0);
565 }
566 
567 static int
568 am335x_syscons_mmap(video_adapter_t *adp, vm_ooffset_t offset, vm_paddr_t *paddr,
569     int prot, vm_memattr_t *memattr)
570 {
571 	struct video_adapter_softc *sc;
572 
573 	sc = (struct video_adapter_softc *)adp;
574 
575 	/*
576 	 * This might be a legacy VGA mem request: if so, just point it at the
577 	 * framebuffer, since it shouldn't be touched
578 	 */
579 	if (offset < sc->stride*sc->height) {
580 		*paddr = sc->fb_paddr + offset;
581 		return (0);
582 	}
583 
584 	return (EINVAL);
585 }
586 
587 static int
588 am335x_syscons_ioctl(video_adapter_t *adp, u_long cmd, caddr_t data)
589 {
590 	struct video_adapter_softc *sc;
591 	struct fbtype *fb;
592 
593 	sc = (struct video_adapter_softc *)adp;
594 
595 	switch (cmd) {
596 	case FBIOGTYPE:
597 		fb = (struct fbtype *)data;
598 		fb->fb_type = FBTYPE_PCIMISC;
599 		fb->fb_height = sc->height;
600 		fb->fb_width = sc->width;
601 		fb->fb_depth = sc->depth;
602 		if (sc->depth <= 1 || sc->depth > 8)
603 			fb->fb_cmsize = 0;
604 		else
605 			fb->fb_cmsize = 1 << sc->depth;
606 		fb->fb_size = sc->fb_size;
607 		break;
608 	default:
609 		return (fb_commonioctl(adp, cmd, data));
610 	}
611 
612 	return (0);
613 }
614 
615 static int
616 am335x_syscons_clear(video_adapter_t *adp)
617 {
618 
619 	return (am335x_syscons_blank_display(adp, 0));
620 }
621 
622 static int
623 am335x_syscons_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
624 {
625 
626 	return (0);
627 }
628 
629 static int
630 am335x_syscons_bitblt(video_adapter_t *adp, ...)
631 {
632 
633 	return (0);
634 }
635 
636 static int
637 am335x_syscons_diag(video_adapter_t *adp, int level)
638 {
639 
640 	return (0);
641 }
642 
643 static int
644 am335x_syscons_save_cursor_palette(video_adapter_t *adp, u_char *palette)
645 {
646 
647 	return (0);
648 }
649 
650 static int
651 am335x_syscons_load_cursor_palette(video_adapter_t *adp, u_char *palette)
652 {
653 
654 	return (0);
655 }
656 
657 static int
658 am335x_syscons_copy(video_adapter_t *adp, vm_offset_t src, vm_offset_t dst, int n)
659 {
660 
661 	return (0);
662 }
663 
664 static int
665 am335x_syscons_putp(video_adapter_t *adp, vm_offset_t off, uint32_t p, uint32_t a,
666     int size, int bpp, int bit_ltor, int byte_ltor)
667 {
668 
669 	return (0);
670 }
671 
672 static int
673 am335x_syscons_putc(video_adapter_t *adp, vm_offset_t off, uint8_t c, uint8_t a)
674 {
675 	struct video_adapter_softc *sc;
676 	int row;
677 	int col;
678 	int i, j, k;
679 	uint8_t *addr;
680 	u_char *p;
681 	uint8_t fg, bg, color;
682 	uint16_t rgb;
683 
684 	sc = (struct video_adapter_softc *)adp;
685 
686 	if (sc->fb_addr == 0)
687 		return (0);
688 
689 	row = (off / adp->va_info.vi_width) * adp->va_info.vi_cheight;
690 	col = (off % adp->va_info.vi_width) * adp->va_info.vi_cwidth;
691 	p = sc->font + c*AM335X_FONT_HEIGHT;
692 	addr = (uint8_t *)sc->fb_addr
693 	    + (row + sc->ymargin)*(sc->stride)
694 	    + (sc->depth/8) * (col + sc->xmargin);
695 
696 	fg = a & 0xf ;
697 	bg = (a >> 4) & 0xf;
698 
699 	for (i = 0; i < AM335X_FONT_HEIGHT; i++) {
700 		for (j = 0, k = 7; j < 8; j++, k--) {
701 			if ((p[i] & (1 << k)) == 0)
702 				color = bg;
703 			else
704 				color = fg;
705 
706 			switch (sc->depth) {
707 			case 32:
708 				addr[4*j+0] = am335x_syscons_palette[color].r;
709 				addr[4*j+1] = am335x_syscons_palette[color].g;
710 				addr[4*j+2] = am335x_syscons_palette[color].b;
711 				addr[4*j+3] = am335x_syscons_palette[color].a;
712 				break;
713 			case 24:
714 				addr[3*j] = am335x_syscons_palette[color].r;
715 				addr[3*j+1] = am335x_syscons_palette[color].g;
716 				addr[3*j+2] = am335x_syscons_palette[color].b;
717 				break;
718 			case 16:
719 				rgb = (am335x_syscons_palette[color].r >> 3) << 11;
720 				rgb |= (am335x_syscons_palette[color].g >> 2) << 5;
721 				rgb |= (am335x_syscons_palette[color].b >> 3);
722 				addr[2*j] = rgb & 0xff;
723 				addr[2*j + 1] = (rgb >> 8) & 0xff;
724 			default:
725 				/* Not supported yet */
726 				break;
727 			}
728 		}
729 
730 		addr += (sc->stride);
731 	}
732 
733         return (0);
734 }
735 
736 static int
737 am335x_syscons_puts(video_adapter_t *adp, vm_offset_t off, u_int16_t *s, int len)
738 {
739 	int i;
740 
741 	for (i = 0; i < len; i++)
742 		am335x_syscons_putc(adp, off + i, s[i] & 0xff, (s[i] & 0xff00) >> 8);
743 
744 	return (0);
745 }
746 
747 static int
748 am335x_syscons_putm(video_adapter_t *adp, int x, int y, uint8_t *pixel_image,
749     uint32_t pixel_mask, int size, int width)
750 {
751 
752 	return (0);
753 }
754 
755 /* Initialization function */
756 int am335x_lcd_syscons_setup(vm_offset_t vaddr, vm_paddr_t paddr,
757     struct panel_info *panel)
758 {
759 	struct video_adapter_softc *va_sc = &va_softc;
760 
761 	va_sc->fb_addr = vaddr;
762 	va_sc->fb_paddr = paddr;
763 	va_sc->depth = panel->bpp;
764 	va_sc->stride = panel->bpp*panel->panel_width/8;
765 
766 	va_sc->width = panel->panel_width;
767 	va_sc->height = panel->panel_height;
768 	va_sc->fb_size = va_sc->width * va_sc->height
769 	    * va_sc->depth/8;
770 	am335x_syscons_update_margins(&va_sc->va);
771 
772 	return (0);
773 }
774 
775 /*
776  * Define a stub keyboard driver in case one hasn't been
777  * compiled into the kernel
778  */
779 #include <sys/kbio.h>
780 #include <dev/kbd/kbdreg.h>
781 
782 static int dummy_kbd_configure(int flags);
783 
784 keyboard_switch_t am335x_dummysw;
785 
786 static int
787 dummy_kbd_configure(int flags)
788 {
789 
790 	return (0);
791 }
792 KEYBOARD_DRIVER(am335x_dummy, am335x_dummysw, dummy_kbd_configure);
793