xref: /freebsd/sys/dev/vt/hw/fb/vt_fb.c (revision 25cdacf79b06356c929e59d5074d26c9dac41bdf) 
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright (c) 2013 The FreeBSD Foundation
5  * All rights reserved.
6  *
7  * This software was developed by Aleksandr Rybalko under sponsorship from the
8  * FreeBSD Foundation.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  */
31 
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34 
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/malloc.h>
38 #include <sys/queue.h>
39 #include <sys/fbio.h>
40 #include <sys/kernel.h>
41 #include <dev/vt/vt.h>
42 #include <dev/vt/hw/fb/vt_fb.h>
43 #include <dev/vt/colors/vt_termcolors.h>
44 
45 #include <vm/vm.h>
46 #include <vm/pmap.h>
47 
48 static struct vt_driver vt_fb_driver = {
49 	.vd_name = "fb",
50 	.vd_init = vt_fb_init,
51 	.vd_fini = vt_fb_fini,
52 	.vd_blank = vt_fb_blank,
53 	.vd_bitblt_text = vt_fb_bitblt_text,
54 	.vd_invalidate_text = vt_fb_invalidate_text,
55 	.vd_bitblt_bmp = vt_fb_bitblt_bitmap,
56 	.vd_drawrect = vt_fb_drawrect,
57 	.vd_setpixel = vt_fb_setpixel,
58 	.vd_postswitch = vt_fb_postswitch,
59 	.vd_priority = VD_PRIORITY_GENERIC+10,
60 	.vd_fb_ioctl = vt_fb_ioctl,
61 	.vd_fb_mmap = vt_fb_mmap,
62 	.vd_suspend = vt_fb_suspend,
63 	.vd_resume = vt_fb_resume,
64 };
65 
66 VT_DRIVER_DECLARE(vt_fb, vt_fb_driver);
67 
68 static void
69 vt_fb_mem_wr1(struct fb_info *sc, uint32_t o, uint8_t v)
70 {
71 
72 	KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
73 	*(uint8_t *)(sc->fb_vbase + o) = v;
74 }
75 
76 static void
77 vt_fb_mem_wr2(struct fb_info *sc, uint32_t o, uint16_t v)
78 {
79 
80 	KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
81 	*(uint16_t *)(sc->fb_vbase + o) = v;
82 }
83 
84 static void
85 vt_fb_mem_wr4(struct fb_info *sc, uint32_t o, uint32_t v)
86 {
87 
88 	KASSERT((o < sc->fb_size), ("Offset %#08x out of fb size", o));
89 	*(uint32_t *)(sc->fb_vbase + o) = v;
90 }
91 
92 int
93 vt_fb_ioctl(struct vt_device *vd, u_long cmd, caddr_t data, struct thread *td)
94 {
95 	struct fb_info *info;
96 	int error = 0;
97 
98 	info = vd->vd_softc;
99 
100 	switch (cmd) {
101 	case FBIOGTYPE:
102 		bcopy(info, (struct fbtype *)data, sizeof(struct fbtype));
103 		break;
104 
105 	case FBIO_GETWINORG:	/* get frame buffer window origin */
106 		*(u_int *)data = 0;
107 		break;
108 
109 	case FBIO_GETDISPSTART:	/* get display start address */
110 		((video_display_start_t *)data)->x = 0;
111 		((video_display_start_t *)data)->y = 0;
112 		break;
113 
114 	case FBIO_GETLINEWIDTH:	/* get scan line width in bytes */
115 		*(u_int *)data = info->fb_stride;
116 		break;
117 
118 	case FBIO_BLANK:	/* blank display */
119 		if (vd->vd_driver->vd_blank == NULL)
120 			return (ENODEV);
121 		vd->vd_driver->vd_blank(vd, TC_BLACK);
122 		break;
123 
124 	default:
125 		error = ENOIOCTL;
126 		break;
127 	}
128 
129 	return (error);
130 }
131 
132 int
133 vt_fb_mmap(struct vt_device *vd, vm_ooffset_t offset, vm_paddr_t *paddr,
134     int prot, vm_memattr_t *memattr)
135 {
136 	struct fb_info *info;
137 
138 	info = vd->vd_softc;
139 
140 	if (info->fb_flags & FB_FLAG_NOMMAP)
141 		return (ENODEV);
142 
143 	if (offset < info->fb_size) {
144 		if (info->fb_pbase == 0) {
145 			*paddr = vtophys((uint8_t *)info->fb_vbase + offset);
146 		} else {
147 			*paddr = info->fb_pbase + offset;
148 			if (info->fb_flags & FB_FLAG_MEMATTR)
149 				*memattr = info->fb_memattr;
150 #ifdef VM_MEMATTR_WRITE_COMBINING
151 			else
152 				*memattr = VM_MEMATTR_WRITE_COMBINING;
153 #endif
154 		}
155 		return (0);
156 	}
157 
158 	return (EINVAL);
159 }
160 
161 void
162 vt_fb_setpixel(struct vt_device *vd, int x, int y, term_color_t color)
163 {
164 	struct fb_info *info;
165 	uint32_t c;
166 	u_int o;
167 
168 	info = vd->vd_softc;
169 	c = info->fb_cmap[color];
170 	o = info->fb_stride * y + x * FBTYPE_GET_BYTESPP(info);
171 
172 	if (info->fb_flags & FB_FLAG_NOWRITE)
173 		return;
174 
175 	KASSERT((info->fb_vbase != 0), ("Unmapped framebuffer"));
176 
177 	switch (FBTYPE_GET_BYTESPP(info)) {
178 	case 1:
179 		vt_fb_mem_wr1(info, o, c);
180 		break;
181 	case 2:
182 		vt_fb_mem_wr2(info, o, c);
183 		break;
184 	case 3:
185 		vt_fb_mem_wr1(info, o, (c >> 16) & 0xff);
186 		vt_fb_mem_wr1(info, o + 1, (c >> 8) & 0xff);
187 		vt_fb_mem_wr1(info, o + 2, c & 0xff);
188 		break;
189 	case 4:
190 		vt_fb_mem_wr4(info, o, c);
191 		break;
192 	default:
193 		/* panic? */
194 		return;
195 	}
196 }
197 
198 void
199 vt_fb_drawrect(struct vt_device *vd, int x1, int y1, int x2, int y2, int fill,
200     term_color_t color)
201 {
202 	int x, y;
203 
204 	for (y = y1; y <= y2; y++) {
205 		if (fill || (y == y1) || (y == y2)) {
206 			for (x = x1; x <= x2; x++)
207 				vt_fb_setpixel(vd, x, y, color);
208 		} else {
209 			vt_fb_setpixel(vd, x1, y, color);
210 			vt_fb_setpixel(vd, x2, y, color);
211 		}
212 	}
213 }
214 
215 void
216 vt_fb_blank(struct vt_device *vd, term_color_t color)
217 {
218 	struct fb_info *info;
219 	uint32_t c;
220 	u_int o, h;
221 
222 	info = vd->vd_softc;
223 	c = info->fb_cmap[color];
224 
225 	if (info->fb_flags & FB_FLAG_NOWRITE)
226 		return;
227 
228 	KASSERT((info->fb_vbase != 0), ("Unmapped framebuffer"));
229 
230 	switch (FBTYPE_GET_BYTESPP(info)) {
231 	case 1:
232 		for (h = 0; h < info->fb_height; h++)
233 			for (o = 0; o < info->fb_stride; o++)
234 				vt_fb_mem_wr1(info, h*info->fb_stride + o, c);
235 		break;
236 	case 2:
237 		for (h = 0; h < info->fb_height; h++)
238 			for (o = 0; o < info->fb_stride - 1; o += 2)
239 				vt_fb_mem_wr2(info, h*info->fb_stride + o, c);
240 		break;
241 	case 3:
242 		for (h = 0; h < info->fb_height; h++)
243 			for (o = 0; o < info->fb_stride - 2; o += 3) {
244 				vt_fb_mem_wr1(info, h*info->fb_stride + o,
245 				    (c >> 16) & 0xff);
246 				vt_fb_mem_wr1(info, h*info->fb_stride + o + 1,
247 				    (c >> 8) & 0xff);
248 				vt_fb_mem_wr1(info, h*info->fb_stride + o + 2,
249 				    c & 0xff);
250 			}
251 		break;
252 	case 4:
253 		for (h = 0; h < info->fb_height; h++)
254 			for (o = 0; o < info->fb_stride - 3; o += 4)
255 				vt_fb_mem_wr4(info, h*info->fb_stride + o, c);
256 		break;
257 	default:
258 		/* panic? */
259 		return;
260 	}
261 }
262 
263 void
264 vt_fb_bitblt_bitmap(struct vt_device *vd, const struct vt_window *vw,
265     const uint8_t *pattern, const uint8_t *mask,
266     unsigned int width, unsigned int height,
267     unsigned int x, unsigned int y, term_color_t fg, term_color_t bg)
268 {
269 	struct fb_info *info;
270 	uint32_t fgc, bgc, cc, o;
271 	int bpp, bpl, xi, yi;
272 	int bit, byte;
273 
274 	info = vd->vd_softc;
275 	bpp = FBTYPE_GET_BYTESPP(info);
276 	fgc = info->fb_cmap[fg];
277 	bgc = info->fb_cmap[bg];
278 	bpl = (width + 7) / 8; /* Bytes per source line. */
279 
280 	if (info->fb_flags & FB_FLAG_NOWRITE)
281 		return;
282 
283 	KASSERT((info->fb_vbase != 0), ("Unmapped framebuffer"));
284 
285 	/* Bound by right and bottom edges. */
286 	if (y + height > vw->vw_draw_area.tr_end.tp_row) {
287 		if (y >= vw->vw_draw_area.tr_end.tp_row)
288 			return;
289 		height = vw->vw_draw_area.tr_end.tp_row - y;
290 	}
291 	if (x + width > vw->vw_draw_area.tr_end.tp_col) {
292 		if (x >= vw->vw_draw_area.tr_end.tp_col)
293 			return;
294 		width = vw->vw_draw_area.tr_end.tp_col - x;
295 	}
296 	for (yi = 0; yi < height; yi++) {
297 		for (xi = 0; xi < width; xi++) {
298 			byte = yi * bpl + xi / 8;
299 			bit = 0x80 >> (xi % 8);
300 			/* Skip pixel write, if mask bit not set. */
301 			if (mask != NULL && (mask[byte] & bit) == 0)
302 				continue;
303 			o = (y + yi) * info->fb_stride + (x + xi) * bpp;
304 			o += vd->vd_transpose;
305 			cc = pattern[byte] & bit ? fgc : bgc;
306 
307 			switch(bpp) {
308 			case 1:
309 				vt_fb_mem_wr1(info, o, cc);
310 				break;
311 			case 2:
312 				vt_fb_mem_wr2(info, o, cc);
313 				break;
314 			case 3:
315 				/* Packed mode, so unaligned. Byte access. */
316 				vt_fb_mem_wr1(info, o, (cc >> 16) & 0xff);
317 				vt_fb_mem_wr1(info, o + 1, (cc >> 8) & 0xff);
318 				vt_fb_mem_wr1(info, o + 2, cc & 0xff);
319 				break;
320 			case 4:
321 				vt_fb_mem_wr4(info, o, cc);
322 				break;
323 			default:
324 				/* panic? */
325 				break;
326 			}
327 		}
328 	}
329 }
330 
331 void
332 vt_fb_bitblt_text(struct vt_device *vd, const struct vt_window *vw,
333     const term_rect_t *area)
334 {
335 	unsigned int col, row, x, y;
336 	struct vt_font *vf;
337 	term_char_t c;
338 	term_color_t fg, bg;
339 	const uint8_t *pattern;
340 	size_t z;
341 
342 	vf = vw->vw_font;
343 
344 	for (row = area->tr_begin.tp_row; row < area->tr_end.tp_row; ++row) {
345 		for (col = area->tr_begin.tp_col; col < area->tr_end.tp_col;
346 		    ++col) {
347 			x = col * vf->vf_width +
348 			    vw->vw_draw_area.tr_begin.tp_col;
349 			y = row * vf->vf_height +
350 			    vw->vw_draw_area.tr_begin.tp_row;
351 
352 			c = VTBUF_GET_FIELD(&vw->vw_buf, row, col);
353 			pattern = vtfont_lookup(vf, c);
354 			vt_determine_colors(c,
355 			    VTBUF_ISCURSOR(&vw->vw_buf, row, col), &fg, &bg);
356 
357 			z = row * PIXEL_WIDTH(VT_FB_MAX_WIDTH) + col;
358 			if (vd->vd_drawn && (vd->vd_drawn[z] == c) &&
359 			    vd->vd_drawnfg && (vd->vd_drawnfg[z] == fg) &&
360 			    vd->vd_drawnbg && (vd->vd_drawnbg[z] == bg))
361 				continue;
362 
363 			vt_fb_bitblt_bitmap(vd, vw,
364 			    pattern, NULL, vf->vf_width, vf->vf_height,
365 			    x, y, fg, bg);
366 
367 			if (vd->vd_drawn)
368 				vd->vd_drawn[z] = c;
369 			if (vd->vd_drawnfg)
370 				vd->vd_drawnfg[z] = fg;
371 			if (vd->vd_drawnbg)
372 				vd->vd_drawnbg[z] = bg;
373 		}
374 	}
375 
376 #ifndef SC_NO_CUTPASTE
377 	if (!vd->vd_mshown)
378 		return;
379 
380 	term_rect_t drawn_area;
381 
382 	drawn_area.tr_begin.tp_col = area->tr_begin.tp_col * vf->vf_width;
383 	drawn_area.tr_begin.tp_row = area->tr_begin.tp_row * vf->vf_height;
384 	drawn_area.tr_end.tp_col = area->tr_end.tp_col * vf->vf_width;
385 	drawn_area.tr_end.tp_row = area->tr_end.tp_row * vf->vf_height;
386 
387 	if (vt_is_cursor_in_area(vd, &drawn_area)) {
388 		vt_fb_bitblt_bitmap(vd, vw,
389 		    vd->vd_mcursor->map, vd->vd_mcursor->mask,
390 		    vd->vd_mcursor->width, vd->vd_mcursor->height,
391 		    vd->vd_mx_drawn + vw->vw_draw_area.tr_begin.tp_col,
392 		    vd->vd_my_drawn + vw->vw_draw_area.tr_begin.tp_row,
393 		    vd->vd_mcursor_fg, vd->vd_mcursor_bg);
394 	}
395 #endif
396 }
397 
398 void
399 vt_fb_invalidate_text(struct vt_device *vd, const term_rect_t *area)
400 {
401 	unsigned int col, row;
402 	size_t z;
403 
404 	for (row = area->tr_begin.tp_row; row < area->tr_end.tp_row; ++row) {
405 		for (col = area->tr_begin.tp_col; col < area->tr_end.tp_col;
406 		    ++col) {
407 			z = row * PIXEL_WIDTH(VT_FB_MAX_WIDTH) + col;
408 			if (vd->vd_drawn)
409 				vd->vd_drawn[z] = 0;
410 			if (vd->vd_drawnfg)
411 				vd->vd_drawnfg[z] = 0;
412 			if (vd->vd_drawnbg)
413 				vd->vd_drawnbg[z] = 0;
414 		}
415 	}
416 }
417 
418 void
419 vt_fb_postswitch(struct vt_device *vd)
420 {
421 	struct fb_info *info;
422 
423 	info = vd->vd_softc;
424 
425 	if (info->enter != NULL)
426 		info->enter(info->fb_priv);
427 }
428 
429 static int
430 vt_fb_init_cmap(uint32_t *cmap, int depth)
431 {
432 
433 	switch (depth) {
434 	case 8:
435 		return (vt_generate_cons_palette(cmap, COLOR_FORMAT_RGB,
436 		    0x7, 5, 0x7, 2, 0x3, 0));
437 	case 15:
438 		return (vt_generate_cons_palette(cmap, COLOR_FORMAT_RGB,
439 		    0x1f, 10, 0x1f, 5, 0x1f, 0));
440 	case 16:
441 		return (vt_generate_cons_palette(cmap, COLOR_FORMAT_RGB,
442 		    0x1f, 11, 0x3f, 5, 0x1f, 0));
443 	case 24:
444 	case 32: /* Ignore alpha. */
445 		return (vt_generate_cons_palette(cmap, COLOR_FORMAT_RGB,
446 		    0xff, 16, 0xff, 8, 0xff, 0));
447 	default:
448 		return (1);
449 	}
450 }
451 
452 int
453 vt_fb_init(struct vt_device *vd)
454 {
455 	struct fb_info *info;
456 	u_int margin;
457 	int bg, err;
458 	term_color_t c;
459 
460 	info = vd->vd_softc;
461 	vd->vd_height = MIN(VT_FB_MAX_HEIGHT, info->fb_height);
462 	margin = (info->fb_height - vd->vd_height) >> 1;
463 	vd->vd_transpose = margin * info->fb_stride;
464 	vd->vd_width = MIN(VT_FB_MAX_WIDTH, info->fb_width);
465 	margin = (info->fb_width - vd->vd_width) >> 1;
466 	vd->vd_transpose += margin * (info->fb_bpp / NBBY);
467 	vd->vd_video_dev = info->fb_video_dev;
468 
469 	if (info->fb_size == 0)
470 		return (CN_DEAD);
471 
472 	if (info->fb_pbase == 0 && info->fb_vbase == 0)
473 		info->fb_flags |= FB_FLAG_NOMMAP;
474 
475 	if (info->fb_cmsize <= 0) {
476 		err = vt_fb_init_cmap(info->fb_cmap, FBTYPE_GET_BPP(info));
477 		if (err)
478 			return (CN_DEAD);
479 		info->fb_cmsize = 16;
480 	}
481 
482 	c = TC_BLACK;
483 	if (TUNABLE_INT_FETCH("teken.bg_color", &bg) != 0) {
484 		if (bg == TC_WHITE)
485 			bg |= TC_LIGHT;
486 		c = bg;
487 	}
488 	/* Clear the screen. */
489 	vd->vd_driver->vd_blank(vd, c);
490 
491 	/* Wakeup screen. KMS need this. */
492 	vt_fb_postswitch(vd);
493 
494 	return (CN_INTERNAL);
495 }
496 
497 void
498 vt_fb_fini(struct vt_device *vd, void *softc)
499 {
500 
501 	vd->vd_video_dev = NULL;
502 }
503 
504 int
505 vt_fb_attach(struct fb_info *info)
506 {
507 
508 	vt_allocate(&vt_fb_driver, info);
509 
510 	return (0);
511 }
512 
513 int
514 vt_fb_detach(struct fb_info *info)
515 {
516 
517 	vt_deallocate(&vt_fb_driver, info);
518 
519 	return (0);
520 }
521 
522 void
523 vt_fb_suspend(struct vt_device *vd)
524 {
525 
526 	vt_suspend(vd);
527 }
528 
529 void
530 vt_fb_resume(struct vt_device *vd)
531 {
532 
533 	vt_resume(vd);
534 }
535