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[u-boot] / drivers / video / vidconsole-uclass.c
1 /*
2  * Copyright (c) 2015 Google, Inc
3  * (C) Copyright 2001-2015
4  * DENX Software Engineering -- wd@denx.de
5  * Compulab Ltd - http://compulab.co.il/
6  * Bernecker & Rainer Industrieelektronik GmbH - http://www.br-automation.com
7  *
8  * SPDX-License-Identifier:     GPL-2.0+
9  */
10
11 #include <common.h>
12 #include <linux/ctype.h>
13 #include <dm.h>
14 #include <video.h>
15 #include <video_console.h>
16 #include <video_font.h>         /* Bitmap font for code page 437 */
17
18 /*
19  * Structure to describe a console color
20  */
21 struct vid_rgb {
22         u32 r;
23         u32 g;
24         u32 b;
25 };
26
27 /* By default we scroll by a single line */
28 #ifndef CONFIG_CONSOLE_SCROLL_LINES
29 #define CONFIG_CONSOLE_SCROLL_LINES 1
30 #endif
31
32 int vidconsole_putc_xy(struct udevice *dev, uint x, uint y, char ch)
33 {
34         struct vidconsole_ops *ops = vidconsole_get_ops(dev);
35
36         if (!ops->putc_xy)
37                 return -ENOSYS;
38         return ops->putc_xy(dev, x, y, ch);
39 }
40
41 int vidconsole_move_rows(struct udevice *dev, uint rowdst, uint rowsrc,
42                          uint count)
43 {
44         struct vidconsole_ops *ops = vidconsole_get_ops(dev);
45
46         if (!ops->move_rows)
47                 return -ENOSYS;
48         return ops->move_rows(dev, rowdst, rowsrc, count);
49 }
50
51 int vidconsole_set_row(struct udevice *dev, uint row, int clr)
52 {
53         struct vidconsole_ops *ops = vidconsole_get_ops(dev);
54
55         if (!ops->set_row)
56                 return -ENOSYS;
57         return ops->set_row(dev, row, clr);
58 }
59
60 static int vidconsole_entry_start(struct udevice *dev)
61 {
62         struct vidconsole_ops *ops = vidconsole_get_ops(dev);
63
64         if (!ops->entry_start)
65                 return -ENOSYS;
66         return ops->entry_start(dev);
67 }
68
69 /* Move backwards one space */
70 static int vidconsole_back(struct udevice *dev)
71 {
72         struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
73         struct vidconsole_ops *ops = vidconsole_get_ops(dev);
74         int ret;
75
76         if (ops->backspace) {
77                 ret = ops->backspace(dev);
78                 if (ret != -ENOSYS)
79                         return ret;
80         }
81
82         priv->xcur_frac -= VID_TO_POS(priv->x_charsize);
83         if (priv->xcur_frac < priv->xstart_frac) {
84                 priv->xcur_frac = (priv->cols - 1) *
85                         VID_TO_POS(priv->x_charsize);
86                 priv->ycur -= priv->y_charsize;
87                 if (priv->ycur < 0)
88                         priv->ycur = 0;
89         }
90         video_sync(dev->parent);
91
92         return 0;
93 }
94
95 /* Move to a newline, scrolling the display if necessary */
96 static void vidconsole_newline(struct udevice *dev)
97 {
98         struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
99         struct udevice *vid_dev = dev->parent;
100         struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev);
101         const int rows = CONFIG_CONSOLE_SCROLL_LINES;
102         int i;
103
104         priv->xcur_frac = priv->xstart_frac;
105         priv->ycur += priv->y_charsize;
106
107         /* Check if we need to scroll the terminal */
108         if ((priv->ycur + priv->y_charsize) / priv->y_charsize > priv->rows) {
109                 vidconsole_move_rows(dev, 0, rows, priv->rows - rows);
110                 for (i = 0; i < rows; i++)
111                         vidconsole_set_row(dev, priv->rows - i - 1,
112                                            vid_priv->colour_bg);
113                 priv->ycur -= rows * priv->y_charsize;
114         }
115         priv->last_ch = 0;
116
117         video_sync(dev->parent);
118 }
119
120 static const struct vid_rgb colors[VID_COLOR_COUNT] = {
121         { 0x00, 0x00, 0x00 },  /* black */
122         { 0xc0, 0x00, 0x00 },  /* red */
123         { 0x00, 0xc0, 0x00 },  /* green */
124         { 0xc0, 0x60, 0x00 },  /* brown */
125         { 0x00, 0x00, 0xc0 },  /* blue */
126         { 0xc0, 0x00, 0xc0 },  /* magenta */
127         { 0x00, 0xc0, 0xc0 },  /* cyan */
128         { 0xc0, 0xc0, 0xc0 },  /* light gray */
129         { 0x80, 0x80, 0x80 },  /* gray */
130         { 0xff, 0x00, 0x00 },  /* bright red */
131         { 0x00, 0xff, 0x00 },  /* bright green */
132         { 0xff, 0xff, 0x00 },  /* yellow */
133         { 0x00, 0x00, 0xff },  /* bright blue */
134         { 0xff, 0x00, 0xff },  /* bright magenta */
135         { 0x00, 0xff, 0xff },  /* bright cyan */
136         { 0xff, 0xff, 0xff },  /* white */
137 };
138
139 u32 vid_console_color(struct video_priv *priv, unsigned int idx)
140 {
141         switch (priv->bpix) {
142         case VIDEO_BPP16:
143                 return ((colors[idx].r >> 3) << 11) |
144                        ((colors[idx].g >> 2) <<  5) |
145                        ((colors[idx].b >> 3) <<  0);
146         case VIDEO_BPP32:
147                 return (colors[idx].r << 16) |
148                        (colors[idx].g <<  8) |
149                        (colors[idx].b <<  0);
150         default:
151                 /*
152                  * For unknown bit arrangements just support
153                  * black and white.
154                  */
155                 if (idx)
156                         return 0xffffff; /* white */
157                 else
158                         return 0x000000; /* black */
159         }
160 }
161
162 static char *parsenum(char *s, int *num)
163 {
164         char *end;
165         *num = simple_strtol(s, &end, 10);
166         return end;
167 }
168
169 /*
170  * Process a character while accumulating an escape string.  Chars are
171  * accumulated into escape_buf until the end of escape sequence is
172  * found, at which point the sequence is parsed and processed.
173  */
174 static void vidconsole_escape_char(struct udevice *dev, char ch)
175 {
176         struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
177
178         if (!IS_ENABLED(CONFIG_VIDEO_ANSI))
179                 goto error;
180
181         /* Sanity checking for bogus ESC sequences: */
182         if (priv->escape_len >= sizeof(priv->escape_buf))
183                 goto error;
184         if (priv->escape_len == 0 && ch != '[')
185                 goto error;
186
187         priv->escape_buf[priv->escape_len++] = ch;
188
189         /*
190          * Escape sequences are terminated by a letter, so keep
191          * accumulating until we get one:
192          */
193         if (!isalpha(ch))
194                 return;
195
196         /*
197          * clear escape mode first, otherwise things will get highly
198          * surprising if you hit any debug prints that come back to
199          * this console.
200          */
201         priv->escape = 0;
202
203         switch (ch) {
204         case 'H':
205         case 'f': {
206                 int row, col;
207                 char *s = priv->escape_buf;
208
209                 /*
210                  * Set cursor position: [%d;%df or [%d;%dH
211                  */
212                 s++;    /* [ */
213                 s = parsenum(s, &row);
214                 s++;    /* ; */
215                 s = parsenum(s, &col);
216
217                 priv->ycur = row * priv->y_charsize;
218                 priv->xcur_frac = priv->xstart_frac +
219                         VID_TO_POS(col * priv->x_charsize);
220
221                 break;
222         }
223         case 'J': {
224                 int mode;
225
226                 /*
227                  * Clear part/all screen:
228                  *   [J or [0J - clear screen from cursor down
229                  *   [1J       - clear screen from cursor up
230                  *   [2J       - clear entire screen
231                  *
232                  * TODO we really only handle entire-screen case, others
233                  * probably require some additions to video-uclass (and
234                  * are not really needed yet by efi_console)
235                  */
236                 parsenum(priv->escape_buf + 1, &mode);
237
238                 if (mode == 2) {
239                         video_clear(dev->parent);
240                         video_sync(dev->parent);
241                         priv->ycur = 0;
242                         priv->xcur_frac = priv->xstart_frac;
243                 } else {
244                         debug("unsupported clear mode: %d\n", mode);
245                 }
246                 break;
247         }
248         case 'm': {
249                 struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
250                 char *s = priv->escape_buf;
251                 char *end = &priv->escape_buf[priv->escape_len];
252
253                 /*
254                  * Set graphics mode: [%d;...;%dm
255                  *
256                  * Currently only supports the color attributes:
257                  *
258                  * Foreground Colors:
259                  *
260                  *   30 Black
261                  *   31 Red
262                  *   32 Green
263                  *   33 Yellow
264                  *   34 Blue
265                  *   35 Magenta
266                  *   36 Cyan
267                  *   37 White
268                  *
269                  * Background Colors:
270                  *
271                  *   40 Black
272                  *   41 Red
273                  *   42 Green
274                  *   43 Yellow
275                  *   44 Blue
276                  *   45 Magenta
277                  *   46 Cyan
278                  *   47 White
279                  */
280
281                 s++;    /* [ */
282                 while (s < end) {
283                         int val;
284
285                         s = parsenum(s, &val);
286                         s++;
287
288                         switch (val) {
289                         case 0:
290                                 /* all attributes off */
291                                 video_set_default_colors(vid_priv);
292                                 break;
293                         case 1:
294                                 /* bold */
295                                 vid_priv->fg_col_idx |= 8;
296                                 vid_priv->colour_fg = vid_console_color(
297                                                 vid_priv, vid_priv->fg_col_idx);
298                                 break;
299                         case 30 ... 37:
300                                 /* foreground color */
301                                 vid_priv->fg_col_idx &= ~7;
302                                 vid_priv->fg_col_idx |= val - 30;
303                                 vid_priv->colour_fg = vid_console_color(
304                                                 vid_priv, vid_priv->fg_col_idx);
305                                 break;
306                         case 40 ... 47:
307                                 /* background color */
308                                 vid_priv->colour_bg = vid_console_color(
309                                                         vid_priv, val - 40);
310                                 break;
311                         default:
312                                 /* ignore unsupported SGR parameter */
313                                 break;
314                         }
315                 }
316
317                 break;
318         }
319         default:
320                 debug("unrecognized escape sequence: %*s\n",
321                       priv->escape_len, priv->escape_buf);
322         }
323
324         return;
325
326 error:
327         /* something went wrong, just revert to normal mode: */
328         priv->escape = 0;
329 }
330
331 int vidconsole_put_char(struct udevice *dev, char ch)
332 {
333         struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
334         int ret;
335
336         if (priv->escape) {
337                 vidconsole_escape_char(dev, ch);
338                 return 0;
339         }
340
341         switch (ch) {
342         case '\x1b':
343                 priv->escape_len = 0;
344                 priv->escape = 1;
345                 break;
346         case '\a':
347                 /* beep */
348                 break;
349         case '\r':
350                 priv->xcur_frac = priv->xstart_frac;
351                 break;
352         case '\n':
353                 vidconsole_newline(dev);
354                 vidconsole_entry_start(dev);
355                 break;
356         case '\t':      /* Tab (8 chars alignment) */
357                 priv->xcur_frac = ((priv->xcur_frac / priv->tab_width_frac)
358                                 + 1) * priv->tab_width_frac;
359
360                 if (priv->xcur_frac >= priv->xsize_frac)
361                         vidconsole_newline(dev);
362                 break;
363         case '\b':
364                 vidconsole_back(dev);
365                 priv->last_ch = 0;
366                 break;
367         default:
368                 /*
369                  * Failure of this function normally indicates an unsupported
370                  * colour depth. Check this and return an error to help with
371                  * diagnosis.
372                  */
373                 ret = vidconsole_putc_xy(dev, priv->xcur_frac, priv->ycur, ch);
374                 if (ret == -EAGAIN) {
375                         vidconsole_newline(dev);
376                         ret = vidconsole_putc_xy(dev, priv->xcur_frac,
377                                                  priv->ycur, ch);
378                 }
379                 if (ret < 0)
380                         return ret;
381                 priv->xcur_frac += ret;
382                 priv->last_ch = ch;
383                 if (priv->xcur_frac >= priv->xsize_frac)
384                         vidconsole_newline(dev);
385                 break;
386         }
387
388         return 0;
389 }
390
391 static void vidconsole_putc(struct stdio_dev *sdev, const char ch)
392 {
393         struct udevice *dev = sdev->priv;
394
395         vidconsole_put_char(dev, ch);
396         video_sync(dev->parent);
397 }
398
399 static void vidconsole_puts(struct stdio_dev *sdev, const char *s)
400 {
401         struct udevice *dev = sdev->priv;
402
403         while (*s)
404                 vidconsole_put_char(dev, *s++);
405         video_sync(dev->parent);
406 }
407
408 /* Set up the number of rows and colours (rotated drivers override this) */
409 static int vidconsole_pre_probe(struct udevice *dev)
410 {
411         struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
412         struct udevice *vid = dev->parent;
413         struct video_priv *vid_priv = dev_get_uclass_priv(vid);
414
415         priv->xsize_frac = VID_TO_POS(vid_priv->xsize);
416
417         return 0;
418 }
419
420 /* Register the device with stdio */
421 static int vidconsole_post_probe(struct udevice *dev)
422 {
423         struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
424         struct stdio_dev *sdev = &priv->sdev;
425
426         if (!priv->tab_width_frac)
427                 priv->tab_width_frac = VID_TO_POS(priv->x_charsize) * 8;
428
429         if (dev->seq) {
430                 snprintf(sdev->name, sizeof(sdev->name), "vidconsole%d",
431                          dev->seq);
432         } else {
433                 strcpy(sdev->name, "vidconsole");
434         }
435
436         sdev->flags = DEV_FLAGS_OUTPUT;
437         sdev->putc = vidconsole_putc;
438         sdev->puts = vidconsole_puts;
439         sdev->priv = dev;
440
441         return stdio_register(sdev);
442 }
443
444 UCLASS_DRIVER(vidconsole) = {
445         .id             = UCLASS_VIDEO_CONSOLE,
446         .name           = "vidconsole0",
447         .pre_probe      = vidconsole_pre_probe,
448         .post_probe     = vidconsole_post_probe,
449         .per_device_auto_alloc_size     = sizeof(struct vidconsole_priv),
450 };
451
452 void vidconsole_position_cursor(struct udevice *dev, unsigned col, unsigned row)
453 {
454         struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
455         struct udevice *vid_dev = dev->parent;
456         struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev);
457
458         priv->xcur_frac = VID_TO_POS(min_t(short, col, vid_priv->xsize - 1));
459         priv->ycur = min_t(short, row, vid_priv->ysize - 1);
460 }
461
462 static int do_video_setcursor(cmd_tbl_t *cmdtp, int flag, int argc,
463                               char *const argv[])
464 {
465         unsigned int col, row;
466         struct udevice *dev;
467
468         if (argc != 3)
469                 return CMD_RET_USAGE;
470
471         if (uclass_first_device_err(UCLASS_VIDEO_CONSOLE, &dev))
472                 return CMD_RET_FAILURE;
473         col = simple_strtoul(argv[1], NULL, 10);
474         row = simple_strtoul(argv[2], NULL, 10);
475         vidconsole_position_cursor(dev, col, row);
476
477         return 0;
478 }
479
480 static int do_video_puts(cmd_tbl_t *cmdtp, int flag, int argc,
481                          char *const argv[])
482 {
483         struct udevice *dev;
484         const char *s;
485
486         if (argc != 2)
487                 return CMD_RET_USAGE;
488
489         if (uclass_first_device_err(UCLASS_VIDEO_CONSOLE, &dev))
490                 return CMD_RET_FAILURE;
491         for (s = argv[1]; *s; s++)
492                 vidconsole_put_char(dev, *s);
493
494         video_sync(dev->parent);
495
496         return 0;
497 }
498
499 U_BOOT_CMD(
500         setcurs, 3,     1,      do_video_setcursor,
501         "set cursor position within screen",
502         "    <col> <row> in character"
503 );
504
505 U_BOOT_CMD(
506         lcdputs, 2,     1,      do_video_puts,
507         "print string on video framebuffer",
508         "    <string>"
509 );