xref: /openbmc/u-boot/common/lcd.c (revision 3102274d)
1 /*
2  * Common LCD routines for supported CPUs
3  *
4  * (C) Copyright 2001-2002
5  * Wolfgang Denk, DENX Software Engineering -- wd@denx.de
6  *
7  * SPDX-License-Identifier:	GPL-2.0+
8  */
9 
10 /************************************************************************/
11 /* ** HEADER FILES							*/
12 /************************************************************************/
13 
14 /* #define DEBUG */
15 
16 #include <config.h>
17 #include <common.h>
18 #include <command.h>
19 #include <stdarg.h>
20 #include <search.h>
21 #include <env_callback.h>
22 #include <linux/types.h>
23 #include <stdio_dev.h>
24 #if defined(CONFIG_POST)
25 #include <post.h>
26 #endif
27 #include <lcd.h>
28 #include <watchdog.h>
29 
30 #include <splash.h>
31 
32 #if defined(CONFIG_CPU_PXA25X) || defined(CONFIG_CPU_PXA27X) || \
33 	defined(CONFIG_CPU_MONAHANS)
34 #define CONFIG_CPU_PXA
35 #include <asm/byteorder.h>
36 #endif
37 
38 #if defined(CONFIG_MPC823)
39 #include <lcdvideo.h>
40 #endif
41 
42 #if defined(CONFIG_ATMEL_LCD)
43 #include <atmel_lcdc.h>
44 #endif
45 
46 #if defined(CONFIG_LCD_DT_SIMPLEFB)
47 #include <libfdt.h>
48 #endif
49 
50 /************************************************************************/
51 /* ** FONT DATA								*/
52 /************************************************************************/
53 #include <video_font.h>		/* Get font data, width and height	*/
54 
55 /************************************************************************/
56 /* ** LOGO DATA								*/
57 /************************************************************************/
58 #ifdef CONFIG_LCD_LOGO
59 # include <bmp_logo.h>		/* Get logo data, width and height	*/
60 # include <bmp_logo_data.h>
61 # if (CONSOLE_COLOR_WHITE >= BMP_LOGO_OFFSET) && (LCD_BPP != LCD_COLOR16)
62 #  error Default Color Map overlaps with Logo Color Map
63 # endif
64 #endif
65 
66 #ifndef CONFIG_LCD_ALIGNMENT
67 #define CONFIG_LCD_ALIGNMENT PAGE_SIZE
68 #endif
69 
70 /* By default we scroll by a single line */
71 #ifndef CONFIG_CONSOLE_SCROLL_LINES
72 #define CONFIG_CONSOLE_SCROLL_LINES 1
73 #endif
74 
75 /************************************************************************/
76 /* ** CONSOLE DEFINITIONS & FUNCTIONS					*/
77 /************************************************************************/
78 #if defined(CONFIG_LCD_LOGO) && !defined(CONFIG_LCD_INFO_BELOW_LOGO)
79 # define CONSOLE_ROWS		((panel_info.vl_row-BMP_LOGO_HEIGHT) \
80 					/ VIDEO_FONT_HEIGHT)
81 #else
82 # define CONSOLE_ROWS		(panel_info.vl_row / VIDEO_FONT_HEIGHT)
83 #endif
84 
85 #define CONSOLE_COLS		(panel_info.vl_col / VIDEO_FONT_WIDTH)
86 #define CONSOLE_ROW_SIZE	(VIDEO_FONT_HEIGHT * lcd_line_length)
87 #define CONSOLE_ROW_FIRST	lcd_console_address
88 #define CONSOLE_ROW_SECOND	(lcd_console_address + CONSOLE_ROW_SIZE)
89 #define CONSOLE_ROW_LAST	(lcd_console_address + CONSOLE_SIZE \
90 					- CONSOLE_ROW_SIZE)
91 #define CONSOLE_SIZE		(CONSOLE_ROW_SIZE * CONSOLE_ROWS)
92 #define CONSOLE_SCROLL_SIZE	(CONSOLE_SIZE - CONSOLE_ROW_SIZE)
93 
94 #if LCD_BPP == LCD_MONOCHROME
95 # define COLOR_MASK(c)		((c)	  | (c) << 1 | (c) << 2 | (c) << 3 | \
96 				 (c) << 4 | (c) << 5 | (c) << 6 | (c) << 7)
97 #elif (LCD_BPP == LCD_COLOR8) || (LCD_BPP == LCD_COLOR16)
98 # define COLOR_MASK(c)		(c)
99 #else
100 # error Unsupported LCD BPP.
101 #endif
102 
103 DECLARE_GLOBAL_DATA_PTR;
104 
105 static void lcd_drawchars(ushort x, ushort y, uchar *str, int count);
106 static inline void lcd_puts_xy(ushort x, ushort y, uchar *s);
107 static inline void lcd_putc_xy(ushort x, ushort y, uchar  c);
108 
109 static int lcd_init(void *lcdbase);
110 
111 static void *lcd_logo(void);
112 
113 static int lcd_getbgcolor(void);
114 static void lcd_setfgcolor(int color);
115 static void lcd_setbgcolor(int color);
116 
117 static int lcd_color_fg;
118 static int lcd_color_bg;
119 int lcd_line_length;
120 
121 char lcd_is_enabled = 0;
122 
123 static short console_col;
124 static short console_row;
125 
126 static void *lcd_console_address;
127 static void *lcd_base;			/* Start of framebuffer memory	*/
128 
129 static char lcd_flush_dcache;	/* 1 to flush dcache after each lcd update */
130 
131 /************************************************************************/
132 
133 /* Flush LCD activity to the caches */
134 void lcd_sync(void)
135 {
136 	/*
137 	 * flush_dcache_range() is declared in common.h but it seems that some
138 	 * architectures do not actually implement it. Is there a way to find
139 	 * out whether it exists? For now, ARM is safe.
140 	 */
141 #if defined(CONFIG_ARM) && !defined(CONFIG_SYS_DCACHE_OFF)
142 	int line_length;
143 
144 	if (lcd_flush_dcache)
145 		flush_dcache_range((u32)lcd_base,
146 			(u32)(lcd_base + lcd_get_size(&line_length)));
147 #endif
148 }
149 
150 void lcd_set_flush_dcache(int flush)
151 {
152 	lcd_flush_dcache = (flush != 0);
153 }
154 
155 /*----------------------------------------------------------------------*/
156 
157 static void console_scrollup(void)
158 {
159 	const int rows = CONFIG_CONSOLE_SCROLL_LINES;
160 
161 	/* Copy up rows ignoring those that will be overwritten */
162 	memcpy(CONSOLE_ROW_FIRST,
163 	       lcd_console_address + CONSOLE_ROW_SIZE * rows,
164 	       CONSOLE_SIZE - CONSOLE_ROW_SIZE * rows);
165 
166 	/* Clear the last rows */
167 	memset(lcd_console_address + CONSOLE_SIZE - CONSOLE_ROW_SIZE * rows,
168 		COLOR_MASK(lcd_color_bg),
169 		CONSOLE_ROW_SIZE * rows);
170 
171 	lcd_sync();
172 	console_row -= rows;
173 }
174 
175 /*----------------------------------------------------------------------*/
176 
177 static inline void console_back(void)
178 {
179 	if (--console_col < 0) {
180 		console_col = CONSOLE_COLS-1 ;
181 		if (--console_row < 0)
182 			console_row = 0;
183 	}
184 
185 	lcd_putc_xy(console_col * VIDEO_FONT_WIDTH,
186 		console_row * VIDEO_FONT_HEIGHT, ' ');
187 }
188 
189 /*----------------------------------------------------------------------*/
190 
191 static inline void console_newline(void)
192 {
193 	console_col = 0;
194 
195 	/* Check if we need to scroll the terminal */
196 	if (++console_row >= CONSOLE_ROWS)
197 		console_scrollup();
198 	else
199 		lcd_sync();
200 }
201 
202 /*----------------------------------------------------------------------*/
203 
204 void lcd_putc(const char c)
205 {
206 	if (!lcd_is_enabled) {
207 		serial_putc(c);
208 
209 		return;
210 	}
211 
212 	switch (c) {
213 	case '\r':
214 		console_col = 0;
215 
216 		return;
217 	case '\n':
218 		console_newline();
219 
220 		return;
221 	case '\t':	/* Tab (8 chars alignment) */
222 		console_col +=  8;
223 		console_col &= ~7;
224 
225 		if (console_col >= CONSOLE_COLS)
226 			console_newline();
227 
228 		return;
229 	case '\b':
230 		console_back();
231 
232 		return;
233 	default:
234 		lcd_putc_xy(console_col * VIDEO_FONT_WIDTH,
235 			console_row * VIDEO_FONT_HEIGHT, c);
236 		if (++console_col >= CONSOLE_COLS)
237 			console_newline();
238 	}
239 }
240 
241 /*----------------------------------------------------------------------*/
242 
243 void lcd_puts(const char *s)
244 {
245 	if (!lcd_is_enabled) {
246 		serial_puts(s);
247 
248 		return;
249 	}
250 
251 	while (*s)
252 		lcd_putc(*s++);
253 
254 	lcd_sync();
255 }
256 
257 /*----------------------------------------------------------------------*/
258 
259 void lcd_printf(const char *fmt, ...)
260 {
261 	va_list args;
262 	char buf[CONFIG_SYS_PBSIZE];
263 
264 	va_start(args, fmt);
265 	vsprintf(buf, fmt, args);
266 	va_end(args);
267 
268 	lcd_puts(buf);
269 }
270 
271 /************************************************************************/
272 /* ** Low-Level Graphics Routines					*/
273 /************************************************************************/
274 
275 static void lcd_drawchars(ushort x, ushort y, uchar *str, int count)
276 {
277 	uchar *dest;
278 	ushort row;
279 
280 #if defined(CONFIG_LCD_LOGO) && !defined(CONFIG_LCD_INFO_BELOW_LOGO)
281 	y += BMP_LOGO_HEIGHT;
282 #endif
283 
284 #if LCD_BPP == LCD_MONOCHROME
285 	ushort off  = x * (1 << LCD_BPP) % 8;
286 #endif
287 
288 	dest = (uchar *)(lcd_base + y * lcd_line_length + x * (1 << LCD_BPP) / 8);
289 
290 	for (row = 0; row < VIDEO_FONT_HEIGHT; ++row, dest += lcd_line_length) {
291 		uchar *s = str;
292 		int i;
293 #if LCD_BPP == LCD_COLOR16
294 		ushort *d = (ushort *)dest;
295 #else
296 		uchar *d = dest;
297 #endif
298 
299 #if LCD_BPP == LCD_MONOCHROME
300 		uchar rest = *d & -(1 << (8 - off));
301 		uchar sym;
302 #endif
303 		for (i = 0; i < count; ++i) {
304 			uchar c, bits;
305 
306 			c = *s++;
307 			bits = video_fontdata[c * VIDEO_FONT_HEIGHT + row];
308 
309 #if LCD_BPP == LCD_MONOCHROME
310 			sym  = (COLOR_MASK(lcd_color_fg) & bits) |
311 				(COLOR_MASK(lcd_color_bg) & ~bits);
312 
313 			*d++ = rest | (sym >> off);
314 			rest = sym << (8-off);
315 #elif LCD_BPP == LCD_COLOR8
316 			for (c = 0; c < 8; ++c) {
317 				*d++ = (bits & 0x80) ?
318 						lcd_color_fg : lcd_color_bg;
319 				bits <<= 1;
320 			}
321 #elif LCD_BPP == LCD_COLOR16
322 			for (c = 0; c < 8; ++c) {
323 				*d++ = (bits & 0x80) ?
324 						lcd_color_fg : lcd_color_bg;
325 				bits <<= 1;
326 			}
327 #endif
328 		}
329 #if LCD_BPP == LCD_MONOCHROME
330 		*d  = rest | (*d & ((1 << (8 - off)) - 1));
331 #endif
332 	}
333 }
334 
335 /*----------------------------------------------------------------------*/
336 
337 static inline void lcd_puts_xy(ushort x, ushort y, uchar *s)
338 {
339 	lcd_drawchars(x, y, s, strlen((char *)s));
340 }
341 
342 /*----------------------------------------------------------------------*/
343 
344 static inline void lcd_putc_xy(ushort x, ushort y, uchar c)
345 {
346 	lcd_drawchars(x, y, &c, 1);
347 }
348 
349 /************************************************************************/
350 /**  Small utility to check that you got the colours right		*/
351 /************************************************************************/
352 #ifdef LCD_TEST_PATTERN
353 
354 #define	N_BLK_VERT	2
355 #define	N_BLK_HOR	3
356 
357 static int test_colors[N_BLK_HOR * N_BLK_VERT] = {
358 	CONSOLE_COLOR_RED,	CONSOLE_COLOR_GREEN,	CONSOLE_COLOR_YELLOW,
359 	CONSOLE_COLOR_BLUE,	CONSOLE_COLOR_MAGENTA,	CONSOLE_COLOR_CYAN,
360 };
361 
362 static void test_pattern(void)
363 {
364 	ushort v_max  = panel_info.vl_row;
365 	ushort h_max  = panel_info.vl_col;
366 	ushort v_step = (v_max + N_BLK_VERT - 1) / N_BLK_VERT;
367 	ushort h_step = (h_max + N_BLK_HOR  - 1) / N_BLK_HOR;
368 	ushort v, h;
369 	uchar *pix = (uchar *)lcd_base;
370 
371 	printf("[LCD] Test Pattern: %d x %d [%d x %d]\n",
372 		h_max, v_max, h_step, v_step);
373 
374 	/* WARNING: Code silently assumes 8bit/pixel */
375 	for (v = 0; v < v_max; ++v) {
376 		uchar iy = v / v_step;
377 		for (h = 0; h < h_max; ++h) {
378 			uchar ix = N_BLK_HOR * iy + h / h_step;
379 			*pix++ = test_colors[ix];
380 		}
381 	}
382 }
383 #endif /* LCD_TEST_PATTERN */
384 
385 
386 /************************************************************************/
387 /* ** GENERIC Initialization Routines					*/
388 /************************************************************************/
389 
390 int lcd_get_size(int *line_length)
391 {
392 	*line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
393 	return *line_length * panel_info.vl_row;
394 }
395 
396 int drv_lcd_init(void)
397 {
398 	struct stdio_dev lcddev;
399 	int rc;
400 
401 	lcd_base = (void *) gd->fb_base;
402 
403 	lcd_init(lcd_base);		/* LCD initialization */
404 
405 	/* Device initialization */
406 	memset(&lcddev, 0, sizeof(lcddev));
407 
408 	strcpy(lcddev.name, "lcd");
409 	lcddev.ext   = 0;			/* No extensions */
410 	lcddev.flags = DEV_FLAGS_OUTPUT;	/* Output only */
411 	lcddev.putc  = lcd_putc;		/* 'putc' function */
412 	lcddev.puts  = lcd_puts;		/* 'puts' function */
413 
414 	rc = stdio_register(&lcddev);
415 
416 	return (rc == 0) ? 1 : rc;
417 }
418 
419 /*----------------------------------------------------------------------*/
420 void lcd_clear(void)
421 {
422 #if LCD_BPP == LCD_MONOCHROME
423 	/* Setting the palette */
424 	lcd_initcolregs();
425 
426 #elif LCD_BPP == LCD_COLOR8
427 	/* Setting the palette */
428 	lcd_setcolreg(CONSOLE_COLOR_BLACK, 0, 0, 0);
429 	lcd_setcolreg(CONSOLE_COLOR_RED, 0xFF, 0, 0);
430 	lcd_setcolreg(CONSOLE_COLOR_GREEN, 0, 0xFF, 0);
431 	lcd_setcolreg(CONSOLE_COLOR_YELLOW, 0xFF, 0xFF, 0);
432 	lcd_setcolreg(CONSOLE_COLOR_BLUE, 0, 0, 0xFF);
433 	lcd_setcolreg(CONSOLE_COLOR_MAGENTA, 0xFF, 0, 0xFF);
434 	lcd_setcolreg(CONSOLE_COLOR_CYAN, 0, 0xFF, 0xFF);
435 	lcd_setcolreg(CONSOLE_COLOR_GREY, 0xAA, 0xAA, 0xAA);
436 	lcd_setcolreg(CONSOLE_COLOR_WHITE, 0xFF, 0xFF, 0xFF);
437 #endif
438 
439 #ifndef CONFIG_SYS_WHITE_ON_BLACK
440 	lcd_setfgcolor(CONSOLE_COLOR_BLACK);
441 	lcd_setbgcolor(CONSOLE_COLOR_WHITE);
442 #else
443 	lcd_setfgcolor(CONSOLE_COLOR_WHITE);
444 	lcd_setbgcolor(CONSOLE_COLOR_BLACK);
445 #endif	/* CONFIG_SYS_WHITE_ON_BLACK */
446 
447 #ifdef	LCD_TEST_PATTERN
448 	test_pattern();
449 #else
450 	/* set framebuffer to background color */
451 	memset((char *)lcd_base,
452 		COLOR_MASK(lcd_getbgcolor()),
453 		lcd_line_length * panel_info.vl_row);
454 #endif
455 	/* Paint the logo and retrieve LCD base address */
456 	debug("[LCD] Drawing the logo...\n");
457 	lcd_console_address = lcd_logo();
458 
459 	console_col = 0;
460 	console_row = 0;
461 	lcd_sync();
462 }
463 
464 static int do_lcd_clear(cmd_tbl_t *cmdtp, int flag, int argc,
465 			char *const argv[])
466 {
467 	lcd_clear();
468 	return 0;
469 }
470 
471 U_BOOT_CMD(
472 	cls,	1,	1,	do_lcd_clear,
473 	"clear screen",
474 	""
475 );
476 
477 /*----------------------------------------------------------------------*/
478 
479 static int lcd_init(void *lcdbase)
480 {
481 	/* Initialize the lcd controller */
482 	debug("[LCD] Initializing LCD frambuffer at %p\n", lcdbase);
483 
484 	lcd_ctrl_init(lcdbase);
485 
486 	/*
487 	 * lcd_ctrl_init() of some drivers (i.e. bcm2835 on rpi_b) ignores
488 	 * the 'lcdbase' argument and uses custom lcd base address
489 	 * by setting up gd->fb_base. Check for this condition and fixup
490 	 * 'lcd_base' address.
491 	 */
492 	if ((unsigned long)lcdbase != gd->fb_base)
493 		lcd_base = (void *)gd->fb_base;
494 
495 	debug("[LCD] Using LCD frambuffer at %p\n", lcd_base);
496 
497 	lcd_get_size(&lcd_line_length);
498 	lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
499 	lcd_is_enabled = 1;
500 	lcd_clear();
501 	lcd_enable();
502 
503 	/* Initialize the console */
504 	console_col = 0;
505 #ifdef CONFIG_LCD_INFO_BELOW_LOGO
506 	console_row = 7 + BMP_LOGO_HEIGHT / VIDEO_FONT_HEIGHT;
507 #else
508 	console_row = 1;	/* leave 1 blank line below logo */
509 #endif
510 
511 	return 0;
512 }
513 
514 
515 /************************************************************************/
516 /* ** ROM capable initialization part - needed to reserve FB memory	*/
517 /************************************************************************/
518 /*
519  * This is called early in the system initialization to grab memory
520  * for the LCD controller.
521  * Returns new address for monitor, after reserving LCD buffer memory
522  *
523  * Note that this is running from ROM, so no write access to global data.
524  */
525 ulong lcd_setmem(ulong addr)
526 {
527 	ulong size;
528 	int line_length;
529 
530 	debug("LCD panel info: %d x %d, %d bit/pix\n", panel_info.vl_col,
531 		panel_info.vl_row, NBITS(panel_info.vl_bpix));
532 
533 	size = lcd_get_size(&line_length);
534 
535 	/* Round up to nearest full page, or MMU section if defined */
536 	size = ALIGN(size, CONFIG_LCD_ALIGNMENT);
537 	addr = ALIGN(addr - CONFIG_LCD_ALIGNMENT + 1, CONFIG_LCD_ALIGNMENT);
538 
539 	/* Allocate pages for the frame buffer. */
540 	addr -= size;
541 
542 	debug("Reserving %ldk for LCD Framebuffer at: %08lx\n",
543 	      size >> 10, addr);
544 
545 	return addr;
546 }
547 
548 /*----------------------------------------------------------------------*/
549 
550 static void lcd_setfgcolor(int color)
551 {
552 	lcd_color_fg = color;
553 }
554 
555 /*----------------------------------------------------------------------*/
556 
557 static void lcd_setbgcolor(int color)
558 {
559 	lcd_color_bg = color;
560 }
561 
562 /*----------------------------------------------------------------------*/
563 
564 int lcd_getfgcolor(void)
565 {
566 	return lcd_color_fg;
567 }
568 
569 /*----------------------------------------------------------------------*/
570 
571 static int lcd_getbgcolor(void)
572 {
573 	return lcd_color_bg;
574 }
575 
576 /************************************************************************/
577 /* ** Chipset depending Bitmap / Logo stuff...                          */
578 /************************************************************************/
579 static inline ushort *configuration_get_cmap(void)
580 {
581 #if defined CONFIG_CPU_PXA
582 	struct pxafb_info *fbi = &panel_info.pxa;
583 	return (ushort *)fbi->palette;
584 #elif defined(CONFIG_MPC823)
585 	immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
586 	cpm8xx_t *cp = &(immr->im_cpm);
587 	return (ushort *)&(cp->lcd_cmap[255 * sizeof(ushort)]);
588 #elif defined(CONFIG_ATMEL_LCD)
589 	return (ushort *)(panel_info.mmio + ATMEL_LCDC_LUT(0));
590 #elif !defined(CONFIG_ATMEL_HLCD) && !defined(CONFIG_EXYNOS_FB)
591 	return panel_info.cmap;
592 #elif defined(CONFIG_LCD_LOGO)
593 	return bmp_logo_palette;
594 #else
595 	return NULL;
596 #endif
597 }
598 
599 #ifdef CONFIG_LCD_LOGO
600 void bitmap_plot(int x, int y)
601 {
602 #ifdef CONFIG_ATMEL_LCD
603 	uint *cmap = (uint *)bmp_logo_palette;
604 #else
605 	ushort *cmap = (ushort *)bmp_logo_palette;
606 #endif
607 	ushort i, j;
608 	uchar *bmap;
609 	uchar *fb;
610 	ushort *fb16;
611 #if defined(CONFIG_MPC823)
612 	immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
613 	cpm8xx_t *cp = &(immr->im_cpm);
614 #endif
615 	unsigned bpix = NBITS(panel_info.vl_bpix);
616 
617 	debug("Logo: width %d  height %d  colors %d  cmap %d\n",
618 		BMP_LOGO_WIDTH, BMP_LOGO_HEIGHT, BMP_LOGO_COLORS,
619 		ARRAY_SIZE(bmp_logo_palette));
620 
621 	bmap = &bmp_logo_bitmap[0];
622 	fb   = (uchar *)(lcd_base + y * lcd_line_length + x * bpix / 8);
623 
624 	if (bpix < 12) {
625 		/* Leave room for default color map
626 		 * default case: generic system with no cmap (most likely 16bpp)
627 		 * cmap was set to the source palette, so no change is done.
628 		 * This avoids even more ifdefs in the next stanza
629 		 */
630 #if defined(CONFIG_MPC823)
631 		cmap = (ushort *) &(cp->lcd_cmap[BMP_LOGO_OFFSET * sizeof(ushort)]);
632 #elif defined(CONFIG_ATMEL_LCD)
633 		cmap = (uint *)configuration_get_cmap();
634 #else
635 		cmap = configuration_get_cmap();
636 #endif
637 
638 		WATCHDOG_RESET();
639 
640 		/* Set color map */
641 		for (i = 0; i < ARRAY_SIZE(bmp_logo_palette); ++i) {
642 			ushort colreg = bmp_logo_palette[i];
643 #ifdef CONFIG_ATMEL_LCD
644 			uint lut_entry;
645 #ifdef CONFIG_ATMEL_LCD_BGR555
646 			lut_entry = ((colreg & 0x000F) << 11) |
647 					((colreg & 0x00F0) <<  2) |
648 					((colreg & 0x0F00) >>  7);
649 #else /* CONFIG_ATMEL_LCD_RGB565 */
650 			lut_entry = ((colreg & 0x000F) << 1) |
651 					((colreg & 0x00F0) << 3) |
652 					((colreg & 0x0F00) << 4);
653 #endif
654 			*(cmap + BMP_LOGO_OFFSET) = lut_entry;
655 			cmap++;
656 #else /* !CONFIG_ATMEL_LCD */
657 #ifdef  CONFIG_SYS_INVERT_COLORS
658 			*cmap++ = 0xffff - colreg;
659 #else
660 			*cmap++ = colreg;
661 #endif
662 #endif /* CONFIG_ATMEL_LCD */
663 		}
664 
665 		WATCHDOG_RESET();
666 
667 		for (i = 0; i < BMP_LOGO_HEIGHT; ++i) {
668 			memcpy(fb, bmap, BMP_LOGO_WIDTH);
669 			bmap += BMP_LOGO_WIDTH;
670 			fb += panel_info.vl_col;
671 		}
672 	}
673 	else { /* true color mode */
674 		u16 col16;
675 		fb16 = (ushort *)fb;
676 		for (i = 0; i < BMP_LOGO_HEIGHT; ++i) {
677 			for (j = 0; j < BMP_LOGO_WIDTH; j++) {
678 				col16 = bmp_logo_palette[(bmap[j]-16)];
679 				fb16[j] =
680 					((col16 & 0x000F) << 1) |
681 					((col16 & 0x00F0) << 3) |
682 					((col16 & 0x0F00) << 4);
683 				}
684 			bmap += BMP_LOGO_WIDTH;
685 			fb16 += panel_info.vl_col;
686 		}
687 	}
688 
689 	WATCHDOG_RESET();
690 	lcd_sync();
691 }
692 #else
693 static inline void bitmap_plot(int x, int y) {}
694 #endif /* CONFIG_LCD_LOGO */
695 
696 /*----------------------------------------------------------------------*/
697 #if defined(CONFIG_CMD_BMP) || defined(CONFIG_SPLASH_SCREEN)
698 /*
699  * Display the BMP file located at address bmp_image.
700  * Only uncompressed.
701  */
702 
703 #ifdef CONFIG_SPLASH_SCREEN_ALIGN
704 #define BMP_ALIGN_CENTER	0x7FFF
705 
706 static void splash_align_axis(int *axis, unsigned long panel_size,
707 					unsigned long picture_size)
708 {
709 	unsigned long panel_picture_delta = panel_size - picture_size;
710 	unsigned long axis_alignment;
711 
712 	if (*axis == BMP_ALIGN_CENTER)
713 		axis_alignment = panel_picture_delta / 2;
714 	else if (*axis < 0)
715 		axis_alignment = panel_picture_delta + *axis + 1;
716 	else
717 		return;
718 
719 	*axis = max(0, axis_alignment);
720 }
721 #endif
722 
723 
724 #ifdef CONFIG_LCD_BMP_RLE8
725 
726 #define BMP_RLE8_ESCAPE		0
727 #define BMP_RLE8_EOL		0
728 #define BMP_RLE8_EOBMP		1
729 #define BMP_RLE8_DELTA		2
730 
731 static void draw_unencoded_bitmap(ushort **fbp, uchar *bmap, ushort *cmap,
732 				  int cnt)
733 {
734 	while (cnt > 0) {
735 		*(*fbp)++ = cmap[*bmap++];
736 		cnt--;
737 	}
738 }
739 
740 static void draw_encoded_bitmap(ushort **fbp, ushort c, int cnt)
741 {
742 	ushort *fb = *fbp;
743 	int cnt_8copy = cnt >> 3;
744 
745 	cnt -= cnt_8copy << 3;
746 	while (cnt_8copy > 0) {
747 		*fb++ = c;
748 		*fb++ = c;
749 		*fb++ = c;
750 		*fb++ = c;
751 		*fb++ = c;
752 		*fb++ = c;
753 		*fb++ = c;
754 		*fb++ = c;
755 		cnt_8copy--;
756 	}
757 	while (cnt > 0) {
758 		*fb++ = c;
759 		cnt--;
760 	}
761 	*fbp = fb;
762 }
763 
764 /*
765  * Do not call this function directly, must be called from lcd_display_bitmap.
766  */
767 static void lcd_display_rle8_bitmap(bmp_image_t *bmp, ushort *cmap, uchar *fb,
768 				    int x_off, int y_off)
769 {
770 	uchar *bmap;
771 	ulong width, height;
772 	ulong cnt, runlen;
773 	int x, y;
774 	int decode = 1;
775 
776 	width = le32_to_cpu(bmp->header.width);
777 	height = le32_to_cpu(bmp->header.height);
778 	bmap = (uchar *)bmp + le32_to_cpu(bmp->header.data_offset);
779 
780 	x = 0;
781 	y = height - 1;
782 
783 	while (decode) {
784 		if (bmap[0] == BMP_RLE8_ESCAPE) {
785 			switch (bmap[1]) {
786 			case BMP_RLE8_EOL:
787 				/* end of line */
788 				bmap += 2;
789 				x = 0;
790 				y--;
791 				/* 16bpix, 2-byte per pixel, width should *2 */
792 				fb -= (width * 2 + lcd_line_length);
793 				break;
794 			case BMP_RLE8_EOBMP:
795 				/* end of bitmap */
796 				decode = 0;
797 				break;
798 			case BMP_RLE8_DELTA:
799 				/* delta run */
800 				x += bmap[2];
801 				y -= bmap[3];
802 				/* 16bpix, 2-byte per pixel, x should *2 */
803 				fb = (uchar *) (lcd_base + (y + y_off - 1)
804 					* lcd_line_length + (x + x_off) * 2);
805 				bmap += 4;
806 				break;
807 			default:
808 				/* unencoded run */
809 				runlen = bmap[1];
810 				bmap += 2;
811 				if (y < height) {
812 					if (x < width) {
813 						if (x + runlen > width)
814 							cnt = width - x;
815 						else
816 							cnt = runlen;
817 						draw_unencoded_bitmap(
818 							(ushort **)&fb,
819 							bmap, cmap, cnt);
820 					}
821 					x += runlen;
822 				}
823 				bmap += runlen;
824 				if (runlen & 1)
825 					bmap++;
826 			}
827 		} else {
828 			/* encoded run */
829 			if (y < height) {
830 				runlen = bmap[0];
831 				if (x < width) {
832 					/* aggregate the same code */
833 					while (bmap[0] == 0xff &&
834 					       bmap[2] != BMP_RLE8_ESCAPE &&
835 					       bmap[1] == bmap[3]) {
836 						runlen += bmap[2];
837 						bmap += 2;
838 					}
839 					if (x + runlen > width)
840 						cnt = width - x;
841 					else
842 						cnt = runlen;
843 					draw_encoded_bitmap((ushort **)&fb,
844 						cmap[bmap[1]], cnt);
845 				}
846 				x += runlen;
847 			}
848 			bmap += 2;
849 		}
850 	}
851 }
852 #endif
853 
854 #if defined(CONFIG_MPC823) || defined(CONFIG_MCC200)
855 #define FB_PUT_BYTE(fb, from) *(fb)++ = (255 - *(from)++)
856 #else
857 #define FB_PUT_BYTE(fb, from) *(fb)++ = *(from)++
858 #endif
859 
860 #if defined(CONFIG_BMP_16BPP)
861 #if defined(CONFIG_ATMEL_LCD_BGR555)
862 static inline void fb_put_word(uchar **fb, uchar **from)
863 {
864 	*(*fb)++ = (((*from)[0] & 0x1f) << 2) | ((*from)[1] & 0x03);
865 	*(*fb)++ = ((*from)[0] & 0xe0) | (((*from)[1] & 0x7c) >> 2);
866 	*from += 2;
867 }
868 #else
869 static inline void fb_put_word(uchar **fb, uchar **from)
870 {
871 	*(*fb)++ = *(*from)++;
872 	*(*fb)++ = *(*from)++;
873 }
874 #endif
875 #endif /* CONFIG_BMP_16BPP */
876 
877 int lcd_display_bitmap(ulong bmp_image, int x, int y)
878 {
879 #if !defined(CONFIG_MCC200)
880 	ushort *cmap = NULL;
881 #endif
882 	ushort *cmap_base = NULL;
883 	ushort i, j;
884 	uchar *fb;
885 	bmp_image_t *bmp=(bmp_image_t *)bmp_image;
886 	uchar *bmap;
887 	ushort padded_width;
888 	unsigned long width, height, byte_width;
889 	unsigned long pwidth = panel_info.vl_col;
890 	unsigned colors, bpix, bmp_bpix;
891 
892 	if (!bmp || !(bmp->header.signature[0] == 'B' &&
893 		bmp->header.signature[1] == 'M')) {
894 		printf("Error: no valid bmp image at %lx\n", bmp_image);
895 
896 		return 1;
897 	}
898 
899 	width = le32_to_cpu(bmp->header.width);
900 	height = le32_to_cpu(bmp->header.height);
901 	bmp_bpix = le16_to_cpu(bmp->header.bit_count);
902 	colors = 1 << bmp_bpix;
903 
904 	bpix = NBITS(panel_info.vl_bpix);
905 
906 	if (bpix != 1 && bpix != 8 && bpix != 16 && bpix != 32) {
907 		printf ("Error: %d bit/pixel mode, but BMP has %d bit/pixel\n",
908 			bpix, bmp_bpix);
909 
910 		return 1;
911 	}
912 
913 	/* We support displaying 8bpp BMPs on 16bpp LCDs */
914 	if (bpix != bmp_bpix && !(bmp_bpix == 8 && bpix == 16)) {
915 		printf ("Error: %d bit/pixel mode, but BMP has %d bit/pixel\n",
916 			bpix,
917 			le16_to_cpu(bmp->header.bit_count));
918 
919 		return 1;
920 	}
921 
922 	debug("Display-bmp: %d x %d  with %d colors\n",
923 		(int)width, (int)height, (int)colors);
924 
925 #if !defined(CONFIG_MCC200)
926 	/* MCC200 LCD doesn't need CMAP, supports 1bpp b&w only */
927 	if (bmp_bpix == 8) {
928 		cmap = configuration_get_cmap();
929 		cmap_base = cmap;
930 
931 		/* Set color map */
932 		for (i = 0; i < colors; ++i) {
933 			bmp_color_table_entry_t cte = bmp->color_table[i];
934 #if !defined(CONFIG_ATMEL_LCD)
935 			ushort colreg =
936 				( ((cte.red)   << 8) & 0xf800) |
937 				( ((cte.green) << 3) & 0x07e0) |
938 				( ((cte.blue)  >> 3) & 0x001f) ;
939 #ifdef CONFIG_SYS_INVERT_COLORS
940 			*cmap = 0xffff - colreg;
941 #else
942 			*cmap = colreg;
943 #endif
944 #if defined(CONFIG_MPC823)
945 			cmap--;
946 #else
947 			cmap++;
948 #endif
949 #else /* CONFIG_ATMEL_LCD */
950 			lcd_setcolreg(i, cte.red, cte.green, cte.blue);
951 #endif
952 		}
953 	}
954 #endif
955 
956 	/*
957 	 *  BMP format for Monochrome assumes that the state of a
958 	 * pixel is described on a per Bit basis, not per Byte.
959 	 *  So, in case of Monochrome BMP we should align widths
960 	 * on a byte boundary and convert them from Bit to Byte
961 	 * units.
962 	 *  Probably, PXA250 and MPC823 process 1bpp BMP images in
963 	 * their own ways, so make the converting to be MCC200
964 	 * specific.
965 	 */
966 #if defined(CONFIG_MCC200)
967 	if (bpix == 1) {
968 		width = ((width + 7) & ~7) >> 3;
969 		x     = ((x + 7) & ~7) >> 3;
970 		pwidth= ((pwidth + 7) & ~7) >> 3;
971 	}
972 #endif
973 
974 	padded_width = (width & 0x3 ? (width & ~0x3) + 4 : width);
975 
976 #ifdef CONFIG_SPLASH_SCREEN_ALIGN
977 	splash_align_axis(&x, pwidth, width);
978 	splash_align_axis(&y, panel_info.vl_row, height);
979 #endif /* CONFIG_SPLASH_SCREEN_ALIGN */
980 
981 	if ((x + width) > pwidth)
982 		width = pwidth - x;
983 	if ((y + height) > panel_info.vl_row)
984 		height = panel_info.vl_row - y;
985 
986 	bmap = (uchar *) bmp + le32_to_cpu(bmp->header.data_offset);
987 	fb   = (uchar *) (lcd_base +
988 		(y + height - 1) * lcd_line_length + x * bpix / 8);
989 
990 	switch (bmp_bpix) {
991 	case 1: /* pass through */
992 	case 8:
993 #ifdef CONFIG_LCD_BMP_RLE8
994 		if (le32_to_cpu(bmp->header.compression) == BMP_BI_RLE8) {
995 			if (bpix != 16) {
996 				/* TODO implement render code for bpix != 16 */
997 				printf("Error: only support 16 bpix");
998 				return 1;
999 			}
1000 			lcd_display_rle8_bitmap(bmp, cmap_base, fb, x, y);
1001 			break;
1002 		}
1003 #endif
1004 
1005 		if (bpix != 16)
1006 			byte_width = width;
1007 		else
1008 			byte_width = width * 2;
1009 
1010 		for (i = 0; i < height; ++i) {
1011 			WATCHDOG_RESET();
1012 			for (j = 0; j < width; j++) {
1013 				if (bpix != 16) {
1014 					FB_PUT_BYTE(fb, bmap);
1015 				} else {
1016 					*(uint16_t *)fb = cmap_base[*(bmap++)];
1017 					fb += sizeof(uint16_t) / sizeof(*fb);
1018 				}
1019 			}
1020 			bmap += (padded_width - width);
1021 			fb -= byte_width + lcd_line_length;
1022 		}
1023 		break;
1024 
1025 #if defined(CONFIG_BMP_16BPP)
1026 	case 16:
1027 		for (i = 0; i < height; ++i) {
1028 			WATCHDOG_RESET();
1029 			for (j = 0; j < width; j++)
1030 				fb_put_word(&fb, &bmap);
1031 
1032 			bmap += (padded_width - width) * 2;
1033 			fb -= width * 2 + lcd_line_length;
1034 		}
1035 		break;
1036 #endif /* CONFIG_BMP_16BPP */
1037 
1038 #if defined(CONFIG_BMP_32BPP)
1039 	case 32:
1040 		for (i = 0; i < height; ++i) {
1041 			for (j = 0; j < width; j++) {
1042 				*(fb++) = *(bmap++);
1043 				*(fb++) = *(bmap++);
1044 				*(fb++) = *(bmap++);
1045 				*(fb++) = *(bmap++);
1046 			}
1047 			fb -= lcd_line_length + width * (bpix / 8);
1048 		}
1049 		break;
1050 #endif /* CONFIG_BMP_32BPP */
1051 	default:
1052 		break;
1053 	};
1054 
1055 	lcd_sync();
1056 	return 0;
1057 }
1058 #endif
1059 
1060 static void *lcd_logo(void)
1061 {
1062 #ifdef CONFIG_SPLASH_SCREEN
1063 	char *s;
1064 	ulong addr;
1065 	static int do_splash = 1;
1066 
1067 	if (do_splash && (s = getenv("splashimage")) != NULL) {
1068 		int x = 0, y = 0;
1069 		do_splash = 0;
1070 
1071 		if (splash_screen_prepare())
1072 			return (void *)lcd_base;
1073 
1074 		addr = simple_strtoul (s, NULL, 16);
1075 
1076 		splash_get_pos(&x, &y);
1077 
1078 		if (bmp_display(addr, x, y) == 0)
1079 			return (void *)lcd_base;
1080 	}
1081 #endif /* CONFIG_SPLASH_SCREEN */
1082 
1083 	bitmap_plot(0, 0);
1084 
1085 #ifdef CONFIG_LCD_INFO
1086 	console_col = LCD_INFO_X / VIDEO_FONT_WIDTH;
1087 	console_row = LCD_INFO_Y / VIDEO_FONT_HEIGHT;
1088 	lcd_show_board_info();
1089 #endif /* CONFIG_LCD_INFO */
1090 
1091 #if defined(CONFIG_LCD_LOGO) && !defined(CONFIG_LCD_INFO_BELOW_LOGO)
1092 	return (void *)((ulong)lcd_base + BMP_LOGO_HEIGHT * lcd_line_length);
1093 #else
1094 	return (void *)lcd_base;
1095 #endif /* CONFIG_LCD_LOGO && !defined(CONFIG_LCD_INFO_BELOW_LOGO) */
1096 }
1097 
1098 #ifdef CONFIG_SPLASHIMAGE_GUARD
1099 static int on_splashimage(const char *name, const char *value, enum env_op op,
1100 	int flags)
1101 {
1102 	ulong addr;
1103 	int aligned;
1104 
1105 	if (op == env_op_delete)
1106 		return 0;
1107 
1108 	addr = simple_strtoul(value, NULL, 16);
1109 	/* See README.displaying-bmps */
1110 	aligned = (addr % 4 == 2);
1111 	if (!aligned) {
1112 		printf("Invalid splashimage value. Value must be 16 bit aligned, but not 32 bit aligned\n");
1113 		return -1;
1114 	}
1115 
1116 	return 0;
1117 }
1118 
1119 U_BOOT_ENV_CALLBACK(splashimage, on_splashimage);
1120 #endif
1121 
1122 void lcd_position_cursor(unsigned col, unsigned row)
1123 {
1124 	console_col = min(col, CONSOLE_COLS - 1);
1125 	console_row = min(row, CONSOLE_ROWS - 1);
1126 }
1127 
1128 int lcd_get_pixel_width(void)
1129 {
1130 	return panel_info.vl_col;
1131 }
1132 
1133 int lcd_get_pixel_height(void)
1134 {
1135 	return panel_info.vl_row;
1136 }
1137 
1138 int lcd_get_screen_rows(void)
1139 {
1140 	return CONSOLE_ROWS;
1141 }
1142 
1143 int lcd_get_screen_columns(void)
1144 {
1145 	return CONSOLE_COLS;
1146 }
1147 
1148 #if defined(CONFIG_LCD_DT_SIMPLEFB)
1149 static int lcd_dt_simplefb_configure_node(void *blob, int off)
1150 {
1151 	u32 stride;
1152 	fdt32_t cells[2];
1153 	int ret;
1154 	static const char format[] =
1155 #if LCD_BPP == LCD_COLOR16
1156 		"r5g6b5";
1157 #else
1158 		"";
1159 #endif
1160 
1161 	if (!format[0])
1162 		return -1;
1163 
1164 	stride = panel_info.vl_col * 2;
1165 
1166 	cells[0] = cpu_to_fdt32(gd->fb_base);
1167 	cells[1] = cpu_to_fdt32(stride * panel_info.vl_row);
1168 	ret = fdt_setprop(blob, off, "reg", cells, sizeof(cells[0]) * 2);
1169 	if (ret < 0)
1170 		return -1;
1171 
1172 	cells[0] = cpu_to_fdt32(panel_info.vl_col);
1173 	ret = fdt_setprop(blob, off, "width", cells, sizeof(cells[0]));
1174 	if (ret < 0)
1175 		return -1;
1176 
1177 	cells[0] = cpu_to_fdt32(panel_info.vl_row);
1178 	ret = fdt_setprop(blob, off, "height", cells, sizeof(cells[0]));
1179 	if (ret < 0)
1180 		return -1;
1181 
1182 	cells[0] = cpu_to_fdt32(stride);
1183 	ret = fdt_setprop(blob, off, "stride", cells, sizeof(cells[0]));
1184 	if (ret < 0)
1185 		return -1;
1186 
1187 	ret = fdt_setprop(blob, off, "format", format, strlen(format) + 1);
1188 	if (ret < 0)
1189 		return -1;
1190 
1191 	ret = fdt_delprop(blob, off, "status");
1192 	if (ret < 0)
1193 		return -1;
1194 
1195 	return 0;
1196 }
1197 
1198 int lcd_dt_simplefb_add_node(void *blob)
1199 {
1200 	static const char compat[] = "simple-framebuffer";
1201 	static const char disabled[] = "disabled";
1202 	int off, ret;
1203 
1204 	off = fdt_add_subnode(blob, 0, "framebuffer");
1205 	if (off < 0)
1206 		return -1;
1207 
1208 	ret = fdt_setprop(blob, off, "status", disabled, sizeof(disabled));
1209 	if (ret < 0)
1210 		return -1;
1211 
1212 	ret = fdt_setprop(blob, off, "compatible", compat, sizeof(compat));
1213 	if (ret < 0)
1214 		return -1;
1215 
1216 	return lcd_dt_simplefb_configure_node(blob, off);
1217 }
1218 
1219 int lcd_dt_simplefb_enable_existing_node(void *blob)
1220 {
1221 	int off;
1222 
1223 	off = fdt_node_offset_by_compatible(blob, -1, "simple-framebuffer");
1224 	if (off < 0)
1225 		return -1;
1226 
1227 	return lcd_dt_simplefb_configure_node(blob, off);
1228 }
1229 #endif
1230