xref: /freebsd/sys/arm/ti/am335x/am335x_lcd_syscons.c (revision 5ca8e32633c4ffbbcd6762e5888b6a4ba0708c6c)
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 
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/resource.h>
48 #include <machine/intr.h>
49 
50 #include <dev/ofw/ofw_bus.h>
51 #include <dev/ofw/ofw_bus_subr.h>
52 
53 #include <dev/fb/fbreg.h>
54 #include <dev/syscons/syscons.h>
55 
56 #include "am335x_lcd.h"
57 
58 struct video_adapter_softc {
59 	/* Videoadpater part */
60 	video_adapter_t	va;
61 	int		console;
62 
63 	intptr_t	fb_addr;
64 	intptr_t	fb_paddr;
65 	unsigned int	fb_size;
66 
67 	unsigned int	height;
68 	unsigned int	width;
69 	unsigned int	depth;
70 	unsigned int	stride;
71 
72 	unsigned int	xmargin;
73 	unsigned int	ymargin;
74 
75 	unsigned char	*font;
76 	int		initialized;
77 };
78 
79 struct argb {
80 	uint8_t		a;
81 	uint8_t		r;
82 	uint8_t		g;
83 	uint8_t		b;
84 };
85 
86 static struct argb am335x_syscons_palette[16] = {
87 	{0x00, 0x00, 0x00, 0x00},
88 	{0x00, 0x00, 0x00, 0xaa},
89 	{0x00, 0x00, 0xaa, 0x00},
90 	{0x00, 0x00, 0xaa, 0xaa},
91 	{0x00, 0xaa, 0x00, 0x00},
92 	{0x00, 0xaa, 0x00, 0xaa},
93 	{0x00, 0xaa, 0x55, 0x00},
94 	{0x00, 0xaa, 0xaa, 0xaa},
95 	{0x00, 0x55, 0x55, 0x55},
96 	{0x00, 0x55, 0x55, 0xff},
97 	{0x00, 0x55, 0xff, 0x55},
98 	{0x00, 0x55, 0xff, 0xff},
99 	{0x00, 0xff, 0x55, 0x55},
100 	{0x00, 0xff, 0x55, 0xff},
101 	{0x00, 0xff, 0xff, 0x55},
102 	{0x00, 0xff, 0xff, 0xff}
103 };
104 
105 /* mouse pointer from dev/syscons/scgfbrndr.c */
106 static u_char mouse_pointer[16] = {
107         0x00, 0x40, 0x60, 0x70, 0x78, 0x7c, 0x7e, 0x68,
108         0x0c, 0x0c, 0x06, 0x06, 0x00, 0x00, 0x00, 0x00
109 };
110 
111 #define	AM335X_FONT_HEIGHT	16
112 
113 #define FB_WIDTH		640
114 #define FB_HEIGHT		480
115 #define FB_DEPTH		24
116 
117 static struct video_adapter_softc va_softc;
118 
119 static int am335x_syscons_configure(int flags);
120 
121 /*
122  * Video driver routines and glue.
123  */
124 static vi_probe_t		am335x_syscons_probe;
125 static vi_init_t		am335x_syscons_init;
126 static vi_get_info_t		am335x_syscons_get_info;
127 static vi_query_mode_t		am335x_syscons_query_mode;
128 static vi_set_mode_t		am335x_syscons_set_mode;
129 static vi_save_font_t		am335x_syscons_save_font;
130 static vi_load_font_t		am335x_syscons_load_font;
131 static vi_show_font_t		am335x_syscons_show_font;
132 static vi_save_palette_t	am335x_syscons_save_palette;
133 static vi_load_palette_t	am335x_syscons_load_palette;
134 static vi_set_border_t		am335x_syscons_set_border;
135 static vi_save_state_t		am335x_syscons_save_state;
136 static vi_load_state_t		am335x_syscons_load_state;
137 static vi_set_win_org_t		am335x_syscons_set_win_org;
138 static vi_read_hw_cursor_t	am335x_syscons_read_hw_cursor;
139 static vi_set_hw_cursor_t	am335x_syscons_set_hw_cursor;
140 static vi_set_hw_cursor_shape_t	am335x_syscons_set_hw_cursor_shape;
141 static vi_blank_display_t	am335x_syscons_blank_display;
142 static vi_mmap_t		am335x_syscons_mmap;
143 static vi_ioctl_t		am335x_syscons_ioctl;
144 static vi_clear_t		am335x_syscons_clear;
145 static vi_fill_rect_t		am335x_syscons_fill_rect;
146 static vi_bitblt_t		am335x_syscons_bitblt;
147 static vi_diag_t		am335x_syscons_diag;
148 static vi_save_cursor_palette_t	am335x_syscons_save_cursor_palette;
149 static vi_load_cursor_palette_t	am335x_syscons_load_cursor_palette;
150 static vi_copy_t		am335x_syscons_copy;
151 static vi_putp_t		am335x_syscons_putp;
152 static vi_putc_t		am335x_syscons_putc;
153 static vi_puts_t		am335x_syscons_puts;
154 static vi_putm_t		am335x_syscons_putm;
155 
156 static video_switch_t am335x_sysconsvidsw = {
157 	.probe			= am335x_syscons_probe,
158 	.init			= am335x_syscons_init,
159 	.get_info		= am335x_syscons_get_info,
160 	.query_mode		= am335x_syscons_query_mode,
161 	.set_mode		= am335x_syscons_set_mode,
162 	.save_font		= am335x_syscons_save_font,
163 	.load_font		= am335x_syscons_load_font,
164 	.show_font		= am335x_syscons_show_font,
165 	.save_palette		= am335x_syscons_save_palette,
166 	.load_palette		= am335x_syscons_load_palette,
167 	.set_border		= am335x_syscons_set_border,
168 	.save_state		= am335x_syscons_save_state,
169 	.load_state		= am335x_syscons_load_state,
170 	.set_win_org		= am335x_syscons_set_win_org,
171 	.read_hw_cursor		= am335x_syscons_read_hw_cursor,
172 	.set_hw_cursor		= am335x_syscons_set_hw_cursor,
173 	.set_hw_cursor_shape	= am335x_syscons_set_hw_cursor_shape,
174 	.blank_display		= am335x_syscons_blank_display,
175 	.mmap			= am335x_syscons_mmap,
176 	.ioctl			= am335x_syscons_ioctl,
177 	.clear			= am335x_syscons_clear,
178 	.fill_rect		= am335x_syscons_fill_rect,
179 	.bitblt			= am335x_syscons_bitblt,
180 	.diag			= am335x_syscons_diag,
181 	.save_cursor_palette	= am335x_syscons_save_cursor_palette,
182 	.load_cursor_palette	= am335x_syscons_load_cursor_palette,
183 	.copy			= am335x_syscons_copy,
184 	.putp			= am335x_syscons_putp,
185 	.putc			= am335x_syscons_putc,
186 	.puts			= am335x_syscons_puts,
187 	.putm			= am335x_syscons_putm,
188 };
189 
190 VIDEO_DRIVER(am335x_syscons, am335x_sysconsvidsw, am335x_syscons_configure);
191 
192 static vr_init_t am335x_rend_init;
193 static vr_clear_t am335x_rend_clear;
194 static vr_draw_border_t am335x_rend_draw_border;
195 static vr_draw_t am335x_rend_draw;
196 static vr_set_cursor_t am335x_rend_set_cursor;
197 static vr_draw_cursor_t am335x_rend_draw_cursor;
198 static vr_blink_cursor_t am335x_rend_blink_cursor;
199 static vr_set_mouse_t am335x_rend_set_mouse;
200 static vr_draw_mouse_t am335x_rend_draw_mouse;
201 
202 /*
203  * We use our own renderer; this is because we must emulate a hardware
204  * cursor.
205  */
206 static sc_rndr_sw_t am335x_rend = {
207 	am335x_rend_init,
208 	am335x_rend_clear,
209 	am335x_rend_draw_border,
210 	am335x_rend_draw,
211 	am335x_rend_set_cursor,
212 	am335x_rend_draw_cursor,
213 	am335x_rend_blink_cursor,
214 	am335x_rend_set_mouse,
215 	am335x_rend_draw_mouse
216 };
217 
218 RENDERER(am335x_syscons, 0, am335x_rend, gfb_set);
219 RENDERER_MODULE(am335x_syscons, gfb_set);
220 
221 static void
222 am335x_rend_init(scr_stat* scp)
223 {
224 }
225 
226 static void
227 am335x_rend_clear(scr_stat* scp, int c, int attr)
228 {
229 }
230 
231 static void
232 am335x_rend_draw_border(scr_stat* scp, int color)
233 {
234 }
235 
236 static void
237 am335x_rend_draw(scr_stat* scp, int from, int count, int flip)
238 {
239 	video_adapter_t* adp = scp->sc->adp;
240 	int i, c, a;
241 
242 	if (!flip) {
243 		/* Normal printing */
244 		vidd_puts(adp, from, (uint16_t*)sc_vtb_pointer(&scp->vtb, from), count);
245 	} else {
246 		/* This is for selections and such: invert the color attribute */
247 		for (i = count; i-- > 0; ++from) {
248 			c = sc_vtb_getc(&scp->vtb, from);
249 			a = sc_vtb_geta(&scp->vtb, from) >> 8;
250 			vidd_putc(adp, from, c, (a >> 4) | ((a & 0xf) << 4));
251 		}
252 	}
253 }
254 
255 static void
256 am335x_rend_set_cursor(scr_stat* scp, int base, int height, int blink)
257 {
258 }
259 
260 static void
261 am335x_rend_draw_cursor(scr_stat* scp, int off, int blink, int on, int flip)
262 {
263 	video_adapter_t* adp = scp->sc->adp;
264 	struct video_adapter_softc *sc;
265 	int row, col;
266 	uint8_t *addr;
267 	int i, j, bytes;
268 
269 	sc = (struct video_adapter_softc *)adp;
270 
271 	if (scp->curs_attr.height <= 0)
272 		return;
273 
274 	if (sc->fb_addr == 0)
275 		return;
276 
277 	if (off >= adp->va_info.vi_width * adp->va_info.vi_height)
278 		return;
279 
280 	/* calculate the coordinates in the video buffer */
281 	row = (off / adp->va_info.vi_width) * adp->va_info.vi_cheight;
282 	col = (off % adp->va_info.vi_width) * adp->va_info.vi_cwidth;
283 
284 	addr = (uint8_t *)sc->fb_addr
285 	    + (row + sc->ymargin)*(sc->stride)
286 	    + (sc->depth/8) * (col + sc->xmargin);
287 
288 	bytes = sc->depth/8;
289 
290 	/* our cursor consists of simply inverting the char under it */
291 	for (i = 0; i < adp->va_info.vi_cheight; i++) {
292 		for (j = 0; j < adp->va_info.vi_cwidth; j++) {
293 			switch (sc->depth) {
294 			case 32:
295 			case 24:
296 				addr[bytes*j + 2] ^= 0xff;
297 				/* FALLTHROUGH */
298 			case 16:
299 				addr[bytes*j + 1] ^= 0xff;
300 				addr[bytes*j] ^= 0xff;
301 				break;
302 			default:
303 				break;
304 			}
305 		}
306 
307 		addr += sc->stride;
308 	}
309 }
310 
311 static void
312 am335x_rend_blink_cursor(scr_stat* scp, int at, int flip)
313 {
314 }
315 
316 static void
317 am335x_rend_set_mouse(scr_stat* scp)
318 {
319 }
320 
321 static void
322 am335x_rend_draw_mouse(scr_stat* scp, int x, int y, int on)
323 {
324 	vidd_putm(scp->sc->adp, x, y, mouse_pointer, 0xffffffff, 16, 8);
325 }
326 
327 static uint16_t am335x_syscons_static_window[ROW*COL];
328 extern u_char dflt_font_16[];
329 
330 /*
331  * Update videoadapter settings after changing resolution
332  */
333 static void
334 am335x_syscons_update_margins(video_adapter_t *adp)
335 {
336 	struct video_adapter_softc *sc;
337 	video_info_t *vi;
338 
339 	sc = (struct video_adapter_softc *)adp;
340 	vi = &adp->va_info;
341 
342 	sc->xmargin = (sc->width - (vi->vi_width * vi->vi_cwidth)) / 2;
343 	sc->ymargin = (sc->height - (vi->vi_height * vi->vi_cheight))/2;
344 }
345 
346 static phandle_t
347 am335x_syscons_find_panel_node(phandle_t start)
348 {
349 	phandle_t child;
350 	phandle_t result;
351 
352 	for (child = OF_child(start); child != 0; child = OF_peer(child)) {
353 		if (ofw_bus_node_is_compatible(child, "ti,am335x-lcd"))
354 			return (child);
355 		if ((result = am335x_syscons_find_panel_node(child)))
356 			return (result);
357 	}
358 
359 	return (0);
360 }
361 
362 static int
363 am335x_syscons_configure(int flags)
364 {
365 	struct video_adapter_softc *va_sc;
366 
367 	va_sc = &va_softc;
368 	phandle_t display, root;
369 	pcell_t cell;
370 
371 	if (va_sc->initialized)
372 		return (0);
373 
374 	va_sc->width = 0;
375 	va_sc->height = 0;
376 
377 	/*
378 	 * It seems there is no way to let syscons framework know
379 	 * that framebuffer resolution has changed. So just try
380 	 * to fetch data from FDT and go with defaults if failed
381 	 */
382 	root = OF_finddevice("/");
383 	if ((root != -1) &&
384 	    (display = am335x_syscons_find_panel_node(root))) {
385 		if ((OF_getencprop(display, "panel_width", &cell,
386 		    sizeof(cell))) > 0)
387 			va_sc->width = cell;
388 
389 		if ((OF_getencprop(display, "panel_height", &cell,
390 		    sizeof(cell))) > 0)
391 			va_sc->height = cell;
392 	}
393 
394 	if (va_sc->width == 0)
395 		va_sc->width = FB_WIDTH;
396 	if (va_sc->height == 0)
397 		va_sc->height = FB_HEIGHT;
398 
399 	am335x_syscons_init(0, &va_sc->va, 0);
400 
401 	va_sc->initialized = 1;
402 
403 	return (0);
404 }
405 
406 static int
407 am335x_syscons_probe(int unit, video_adapter_t **adp, void *arg, int flags)
408 {
409 
410 	return (0);
411 }
412 
413 static int
414 am335x_syscons_init(int unit, video_adapter_t *adp, int flags)
415 {
416 	struct video_adapter_softc *sc;
417 	video_info_t *vi;
418 
419 	sc = (struct video_adapter_softc *)adp;
420 	vi = &adp->va_info;
421 
422 	vid_init_struct(adp, "am335x_syscons", -1, unit);
423 
424 	sc->font = dflt_font_16;
425 	vi->vi_cheight = AM335X_FONT_HEIGHT;
426 	vi->vi_cwidth = 8;
427 
428 	vi->vi_width = sc->width/8;
429 	vi->vi_height = sc->height/vi->vi_cheight;
430 
431 	/*
432 	 * Clamp width/height to syscons maximums
433 	 */
434 	if (vi->vi_width > COL)
435 		vi->vi_width = COL;
436 	if (vi->vi_height > ROW)
437 		vi->vi_height = ROW;
438 
439 	sc->xmargin = (sc->width - (vi->vi_width * vi->vi_cwidth)) / 2;
440 	sc->ymargin = (sc->height - (vi->vi_height * vi->vi_cheight))/2;
441 
442 	adp->va_window = (vm_offset_t) am335x_syscons_static_window;
443 	adp->va_flags |= V_ADP_FONT /* | V_ADP_COLOR | V_ADP_MODECHANGE */;
444 
445 	vid_register(&sc->va);
446 
447 	return (0);
448 }
449 
450 static int
451 am335x_syscons_get_info(video_adapter_t *adp, int mode, video_info_t *info)
452 {
453 	bcopy(&adp->va_info, info, sizeof(*info));
454 	return (0);
455 }
456 
457 static int
458 am335x_syscons_query_mode(video_adapter_t *adp, video_info_t *info)
459 {
460 	return (0);
461 }
462 
463 static int
464 am335x_syscons_set_mode(video_adapter_t *adp, int mode)
465 {
466 	return (0);
467 }
468 
469 static int
470 am335x_syscons_save_font(video_adapter_t *adp, int page, int size, int width,
471     u_char *data, int c, int count)
472 {
473 	return (0);
474 }
475 
476 static int
477 am335x_syscons_load_font(video_adapter_t *adp, int page, int size, int width,
478     u_char *data, int c, int count)
479 {
480 	struct video_adapter_softc *sc = (struct video_adapter_softc *)adp;
481 
482 	sc->font = data;
483 
484 	return (0);
485 }
486 
487 static int
488 am335x_syscons_show_font(video_adapter_t *adp, int page)
489 {
490 	return (0);
491 }
492 
493 static int
494 am335x_syscons_save_palette(video_adapter_t *adp, u_char *palette)
495 {
496 	return (0);
497 }
498 
499 static int
500 am335x_syscons_load_palette(video_adapter_t *adp, u_char *palette)
501 {
502 	return (0);
503 }
504 
505 static int
506 am335x_syscons_set_border(video_adapter_t *adp, int border)
507 {
508 	return (am335x_syscons_blank_display(adp, border));
509 }
510 
511 static int
512 am335x_syscons_save_state(video_adapter_t *adp, void *p, size_t size)
513 {
514 	return (0);
515 }
516 
517 static int
518 am335x_syscons_load_state(video_adapter_t *adp, void *p)
519 {
520 	return (0);
521 }
522 
523 static int
524 am335x_syscons_set_win_org(video_adapter_t *adp, off_t offset)
525 {
526 	return (0);
527 }
528 
529 static int
530 am335x_syscons_read_hw_cursor(video_adapter_t *adp, int *col, int *row)
531 {
532 	*col = *row = 0;
533 
534 	return (0);
535 }
536 
537 static int
538 am335x_syscons_set_hw_cursor(video_adapter_t *adp, int col, int row)
539 {
540 	return (0);
541 }
542 
543 static int
544 am335x_syscons_set_hw_cursor_shape(video_adapter_t *adp, int base, int height,
545     int celsize, int blink)
546 {
547 	return (0);
548 }
549 
550 static int
551 am335x_syscons_blank_display(video_adapter_t *adp, int mode)
552 {
553 
554 	struct video_adapter_softc *sc;
555 
556 	sc = (struct video_adapter_softc *)adp;
557 	if (sc && sc->fb_addr)
558 		memset((void*)sc->fb_addr, 0, sc->fb_size);
559 
560 	return (0);
561 }
562 
563 static int
564 am335x_syscons_mmap(video_adapter_t *adp, vm_ooffset_t offset, vm_paddr_t *paddr,
565     int prot, vm_memattr_t *memattr)
566 {
567 	struct video_adapter_softc *sc;
568 
569 	sc = (struct video_adapter_softc *)adp;
570 
571 	/*
572 	 * This might be a legacy VGA mem request: if so, just point it at the
573 	 * framebuffer, since it shouldn't be touched
574 	 */
575 	if (offset < sc->stride*sc->height) {
576 		*paddr = sc->fb_paddr + offset;
577 		return (0);
578 	}
579 
580 	return (EINVAL);
581 }
582 
583 static int
584 am335x_syscons_ioctl(video_adapter_t *adp, u_long cmd, caddr_t data)
585 {
586 	struct video_adapter_softc *sc;
587 	struct fbtype *fb;
588 
589 	sc = (struct video_adapter_softc *)adp;
590 
591 	switch (cmd) {
592 	case FBIOGTYPE:
593 		fb = (struct fbtype *)data;
594 		fb->fb_type = FBTYPE_PCIMISC;
595 		fb->fb_height = sc->height;
596 		fb->fb_width = sc->width;
597 		fb->fb_depth = sc->depth;
598 		if (sc->depth <= 1 || sc->depth > 8)
599 			fb->fb_cmsize = 0;
600 		else
601 			fb->fb_cmsize = 1 << sc->depth;
602 		fb->fb_size = sc->fb_size;
603 		break;
604 	default:
605 		return (fb_commonioctl(adp, cmd, data));
606 	}
607 
608 	return (0);
609 }
610 
611 static int
612 am335x_syscons_clear(video_adapter_t *adp)
613 {
614 
615 	return (am335x_syscons_blank_display(adp, 0));
616 }
617 
618 static int
619 am335x_syscons_fill_rect(video_adapter_t *adp, int val, int x, int y, int cx, int cy)
620 {
621 
622 	return (0);
623 }
624 
625 static int
626 am335x_syscons_bitblt(video_adapter_t *adp, ...)
627 {
628 
629 	return (0);
630 }
631 
632 static int
633 am335x_syscons_diag(video_adapter_t *adp, int level)
634 {
635 
636 	return (0);
637 }
638 
639 static int
640 am335x_syscons_save_cursor_palette(video_adapter_t *adp, u_char *palette)
641 {
642 
643 	return (0);
644 }
645 
646 static int
647 am335x_syscons_load_cursor_palette(video_adapter_t *adp, u_char *palette)
648 {
649 
650 	return (0);
651 }
652 
653 static int
654 am335x_syscons_copy(video_adapter_t *adp, vm_offset_t src, vm_offset_t dst, int n)
655 {
656 
657 	return (0);
658 }
659 
660 static int
661 am335x_syscons_putp(video_adapter_t *adp, vm_offset_t off, uint32_t p, uint32_t a,
662     int size, int bpp, int bit_ltor, int byte_ltor)
663 {
664 
665 	return (0);
666 }
667 
668 static int
669 am335x_syscons_putc(video_adapter_t *adp, vm_offset_t off, uint8_t c, uint8_t a)
670 {
671 	struct video_adapter_softc *sc;
672 	int row;
673 	int col;
674 	int i, j, k;
675 	uint8_t *addr;
676 	u_char *p;
677 	uint8_t fg, bg, color;
678 	uint16_t rgb;
679 
680 	sc = (struct video_adapter_softc *)adp;
681 
682 	if (sc->fb_addr == 0)
683 		return (0);
684 
685 	row = (off / adp->va_info.vi_width) * adp->va_info.vi_cheight;
686 	col = (off % adp->va_info.vi_width) * adp->va_info.vi_cwidth;
687 	p = sc->font + c*AM335X_FONT_HEIGHT;
688 	addr = (uint8_t *)sc->fb_addr
689 	    + (row + sc->ymargin)*(sc->stride)
690 	    + (sc->depth/8) * (col + sc->xmargin);
691 
692 	fg = a & 0xf ;
693 	bg = (a >> 4) & 0xf;
694 
695 	for (i = 0; i < AM335X_FONT_HEIGHT; i++) {
696 		for (j = 0, k = 7; j < 8; j++, k--) {
697 			if ((p[i] & (1 << k)) == 0)
698 				color = bg;
699 			else
700 				color = fg;
701 
702 			switch (sc->depth) {
703 			case 32:
704 				addr[4*j+0] = am335x_syscons_palette[color].r;
705 				addr[4*j+1] = am335x_syscons_palette[color].g;
706 				addr[4*j+2] = am335x_syscons_palette[color].b;
707 				addr[4*j+3] = am335x_syscons_palette[color].a;
708 				break;
709 			case 24:
710 				addr[3*j] = am335x_syscons_palette[color].r;
711 				addr[3*j+1] = am335x_syscons_palette[color].g;
712 				addr[3*j+2] = am335x_syscons_palette[color].b;
713 				break;
714 			case 16:
715 				rgb = (am335x_syscons_palette[color].r >> 3) << 11;
716 				rgb |= (am335x_syscons_palette[color].g >> 2) << 5;
717 				rgb |= (am335x_syscons_palette[color].b >> 3);
718 				addr[2*j] = rgb & 0xff;
719 				addr[2*j + 1] = (rgb >> 8) & 0xff;
720 			default:
721 				/* Not supported yet */
722 				break;
723 			}
724 		}
725 
726 		addr += (sc->stride);
727 	}
728 
729         return (0);
730 }
731 
732 static int
733 am335x_syscons_puts(video_adapter_t *adp, vm_offset_t off, u_int16_t *s, int len)
734 {
735 	int i;
736 
737 	for (i = 0; i < len; i++)
738 		am335x_syscons_putc(adp, off + i, s[i] & 0xff, (s[i] & 0xff00) >> 8);
739 
740 	return (0);
741 }
742 
743 static int
744 am335x_syscons_putm(video_adapter_t *adp, int x, int y, uint8_t *pixel_image,
745     uint32_t pixel_mask, int size, int width)
746 {
747 
748 	return (0);
749 }
750 
751 /* Initialization function */
752 int am335x_lcd_syscons_setup(vm_offset_t vaddr, vm_paddr_t paddr,
753     struct panel_info *panel)
754 {
755 	struct video_adapter_softc *va_sc = &va_softc;
756 
757 	va_sc->fb_addr = vaddr;
758 	va_sc->fb_paddr = paddr;
759 	va_sc->depth = panel->bpp;
760 	va_sc->stride = panel->bpp*panel->panel_width/8;
761 
762 	va_sc->width = panel->panel_width;
763 	va_sc->height = panel->panel_height;
764 	va_sc->fb_size = va_sc->width * va_sc->height
765 	    * va_sc->depth/8;
766 	am335x_syscons_update_margins(&va_sc->va);
767 
768 	return (0);
769 }
770