]>
git.ipfire.org Git - people/ms/u-boot.git/blob - board/trab/vfd.c
3 * Wolfgang Denk, DENX Software Engineering -- wd@denx.de
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 /************************************************************************/
25 /* ** DEBUG SETTINGS */
26 /************************************************************************/
30 /************************************************************************/
32 /************************************************************************/
38 #include <linux/types.h>
39 #include <stdio_dev.h>
40 #include <asm/arch/s3c24x0_cpu.h>
42 DECLARE_GLOBAL_DATA_PTR
;
46 /************************************************************************/
47 /* ** CONFIG STUFF -- should be moved to board config file */
48 /************************************************************************/
50 /************************************************************************/
53 #define PAGE_SIZE 4096
61 #define FRAME_BUF_SIZE ((256*4*56)/8)
62 #define frame_buf_offs 4
64 /* defines for starting Timer3 as CPLD-Clk */
65 #define START3 (1 << 16)
66 #define UPDATE3 (1 << 17)
67 #define INVERT3 (1 << 18)
68 #define RELOAD3 (1 << 19)
70 /* CPLD-Register for controlling vfd-blank-signal */
71 #define VFD_DISABLE (*(volatile uchar *)0x04038000=0x0000)
72 #define VFD_ENABLE (*(volatile uchar *)0x04038000=0x0001)
74 /* Supported VFD Types */
75 #define VFD_TYPE_T119C 1 /* Noritake T119C VFD */
76 #define VFD_TYPE_MN11236 2
78 /*#define NEW_CPLD_CLK*/
82 /* taken from armboot/common/vfd.c */
83 unsigned long adr_vfd_table
[112][18][2][4][2];
84 unsigned char bit_vfd_table
[112][18][2][4][2];
87 * initialize the values for the VFD-grid-control in the framebuffer
89 void init_grid_ctrl(void)
91 ulong adr
, grid_cycle
;
92 unsigned int bit
, display
;
93 unsigned char temp
, bit_nr
;
96 * clear frame buffer (logical clear => set to "black")
98 memset ((void *)(gd
->fb_base
), 0, FRAME_BUF_SIZE
);
100 switch (gd
->vfd_type
) {
102 for (display
=0; display
<4; display
++) {
103 for(grid_cycle
=0; grid_cycle
<56; grid_cycle
++) {
104 bit
= grid_cycle
* 256 * 4 +
105 (grid_cycle
+ 200) * 4 +
106 frame_buf_offs
+ display
;
107 /* wrap arround if offset (see manual S3C2400) */
108 if (bit
>=FRAME_BUF_SIZE
*8)
109 bit
= bit
- (FRAME_BUF_SIZE
* 8);
110 adr
= gd
->fb_base
+ (bit
/32) * 4 + (3 - (bit
%32) / 8);
112 bit_nr
= (bit_nr
> 3) ? bit_nr
-4 : bit_nr
+4;
113 temp
=(*(volatile unsigned char*)(adr
));
115 (*(volatile unsigned char*)(adr
))=temp
;
118 bit
= grid_cycle
*256*4+(grid_cycle
+201)*4+frame_buf_offs
+display
;
120 bit
= grid_cycle
*256*4+200*4+frame_buf_offs
+display
-4; /* grid nr. 0 */
121 /* wrap arround if offset (see manual S3C2400) */
122 if (bit
>=FRAME_BUF_SIZE
*8)
123 bit
= bit
-(FRAME_BUF_SIZE
*8);
124 adr
= gd
->fb_base
+(bit
/32)*4+(3-(bit
%32)/8);
126 bit_nr
= (bit_nr
>3)?bit_nr
-4:bit_nr
+4;
127 temp
=(*(volatile unsigned char*)(adr
));
129 (*(volatile unsigned char*)(adr
))=temp
;
133 case VFD_TYPE_MN11236
:
134 for (display
=0; display
<4; display
++) {
135 for (grid_cycle
=0; grid_cycle
<38; grid_cycle
++) {
136 bit
= grid_cycle
* 256 * 4 +
137 (253 - grid_cycle
) * 4 +
138 frame_buf_offs
+ display
;
139 /* wrap arround if offset (see manual S3C2400) */
140 if (bit
>=FRAME_BUF_SIZE
*8)
141 bit
= bit
- (FRAME_BUF_SIZE
* 8);
142 adr
= gd
->fb_base
+ (bit
/32) * 4 + (3 - (bit
%32) / 8);
144 bit_nr
= (bit_nr
> 3) ? bit_nr
-4 : bit_nr
+4;
145 temp
=(*(volatile unsigned char*)(adr
));
147 (*(volatile unsigned char*)(adr
))=temp
;
150 bit
= grid_cycle
*256*4+(252-grid_cycle
)*4+frame_buf_offs
+display
;
152 /* wrap arround if offset (see manual S3C2400) */
153 if (bit
>=FRAME_BUF_SIZE
*8)
154 bit
= bit
-(FRAME_BUF_SIZE
*8);
155 adr
= gd
->fb_base
+(bit
/32)*4+(3-(bit
%32)/8);
157 bit_nr
= (bit_nr
>3)?bit_nr
-4:bit_nr
+4;
158 temp
=(*(volatile unsigned char*)(adr
));
160 (*(volatile unsigned char*)(adr
))=temp
;
165 printf ("Warning: unknown display type\n");
171 *create translation table for getting easy the right position in the
172 *physical framebuffer for some x/y-coordinates of the VFDs
174 void create_vfd_table(void)
176 unsigned long vfd_table
[112][18][2][4][2];
177 unsigned int x
, y
, color
, display
, entry
, pixel
;
178 unsigned int x_abcdef
= 0;
180 switch (gd
->vfd_type
) {
182 for(y
=0; y
<=17; y
++) { /* Line */
183 for(x
=0; x
<=111; x
++) { /* Column */
184 for(display
=0; display
<=3; display
++) {
186 /* Display 0 blue pixels */
187 vfd_table
[x
][y
][0][display
][0] =
188 (x
==0) ? y
*16+display
189 : (x
%4)*4+y
*16+((x
-1)/2)*1024+display
;
190 /* Display 0 red pixels */
191 vfd_table
[x
][y
][1][display
][0] =
192 (x
==0) ? y
*16+512+display
193 : (x
%4)*4+y
*16+((x
-1)/2)*1024+512+display
;
198 case VFD_TYPE_MN11236
:
199 for(y
=0; y
<=17; y
++) { /* Line */
200 for(x
=0; x
<=111; x
++) { /* Column */
201 for(display
=0; display
<=3; display
++) {
203 vfd_table
[x
][y
][0][display
][0]=0;
204 vfd_table
[x
][y
][0][display
][1]=0;
205 vfd_table
[x
][y
][1][display
][0]=0;
206 vfd_table
[x
][y
][1][display
][1]=0;
209 case 0: x_abcdef
=0; break; /* a -> a */
210 case 1: x_abcdef
=2; break; /* b -> c */
211 case 2: x_abcdef
=4; break; /* c -> e */
212 case 3: x_abcdef
=5; break; /* d -> f */
213 case 4: x_abcdef
=3; break; /* e -> d */
214 case 5: x_abcdef
=1; break; /* f -> b */
218 vfd_table
[x
][y
][0][display
][0] =
219 (x
>1) ? x_abcdef
*4+((x
-1)/3)*1024+y
*48+display
220 : x_abcdef
*4+ 0+y
*48+display
;
223 vfd_table
[x
][y
][0][display
][1] = x_abcdef
*4+((x
-1)/3+1)*1024+y
*48+display
;
226 vfd_table
[x
][y
][1][display
][0] =
227 (x
>1) ? x_abcdef
*4+24+((x
-1)/3)*1024+y
*48+display
228 : x_abcdef
*4+24+ 0+y
*48+display
;
231 vfd_table
[x
][y
][1][display
][1] = x_abcdef
*4+24+((x
-1)/3+1)*1024+y
*48+display
;
242 * Create table with entries for physical byte adresses and
243 * bit-number within the byte
244 * from table with bit-numbers within the total framebuffer
248 for(color
=0;color
<2;color
++) {
249 for(display
=0;display
<4;display
++) {
250 for(entry
=0;entry
<2;entry
++) {
251 unsigned long adr
= gd
->fb_base
;
252 unsigned int bit_nr
= 0;
254 pixel
= vfd_table
[x
][y
][color
][display
][entry
] + frame_buf_offs
;
256 * wrap arround if offset
257 * (see manual S3C2400)
259 if (pixel
>=FRAME_BUF_SIZE
*8)
260 pixel
= pixel
-(FRAME_BUF_SIZE
*8);
261 adr
= gd
->fb_base
+(pixel
/32)*4+(3-(pixel
%32)/8);
263 bit_nr
= (bit_nr
>3)?bit_nr
-4:bit_nr
+4;
265 adr_vfd_table
[x
][y
][color
][display
][entry
] = adr
;
266 bit_vfd_table
[x
][y
][color
][display
][entry
] = bit_nr
;
275 * Set/clear pixel of the VFDs
277 void set_vfd_pixel(unsigned char x
, unsigned char y
,
278 unsigned char color
, unsigned char display
,
282 unsigned char bit_nr
, temp
;
284 if (! gd
->vfd_type
) {
289 /* Pixel-Eintrag Nr. 1 */
290 adr
= adr_vfd_table
[x
][y
][color
][display
][0];
291 /* Pixel-Eintrag Nr. 1 */
292 bit_nr
= bit_vfd_table
[x
][y
][color
][display
][0];
293 temp
=(*(volatile unsigned char*)(adr
));
298 temp
&= ~(1<<bit_nr
);
300 (*(volatile unsigned char*)(adr
))=temp
;
304 * transfer image from BMP-File
306 void transfer_pic(int display
, unsigned char *adr
, int height
, int width
)
311 for (; height
> 0; height
-= 18)
319 for (x
= 0; x
< width
; x
+= 2)
322 set_vfd_pixel(x
, y
-1, 0, display
, 0);
323 set_vfd_pixel(x
, y
-1, 1, display
, 0);
324 if ((temp
>> 4) == BLAU
)
325 set_vfd_pixel(x
, y
-1, 0, display
, 1);
326 else if ((temp
>> 4) == ROT
)
327 set_vfd_pixel(x
, y
-1, 1, display
, 1);
328 else if ((temp
>> 4) == VIOLETT
)
330 set_vfd_pixel(x
, y
-1, 0, display
, 1);
331 set_vfd_pixel(x
, y
-1, 1, display
, 1);
333 set_vfd_pixel(x
+1, y
-1, 0, display
, 0);
334 set_vfd_pixel(x
+1, y
-1, 1, display
, 0);
335 if ((temp
& 0x0F) == BLAU
)
336 set_vfd_pixel(x
+1, y
-1, 0, display
, 1);
337 else if ((temp
& 0x0F) == ROT
)
338 set_vfd_pixel(x
+1, y
-1, 1, display
, 1);
339 else if ((temp
& 0x0F) == VIOLETT
)
341 set_vfd_pixel(x
+1, y
-1, 0, display
, 1);
342 set_vfd_pixel(x
+1, y
-1, 1, display
, 1);
354 * This function initializes VFD clock that is needed for the CPLD that
355 * manages the keyboard.
357 int vfd_init_clocks (void)
361 struct s3c24x0_gpio
* const gpio
= s3c24x0_get_base_gpio();
362 struct s3c24x0_timers
* const timers
= s3c24x0_get_base_timers();
363 struct s3c24x0_lcd
* const lcd
= s3c24x0_get_base_lcd();
365 /* try to determine display type from the value
366 * defined by pull-ups
368 gpio
->PCUP
= (gpio
->PCUP
& 0xFFF0); /* activate GPC0...GPC3 pullups */
369 gpio
->PCCON
= (gpio
->PCCON
& 0xFFFFFF00); /* configure GPC0...GPC3 as inputs */
370 /* allow signals to settle */
371 for (i
=0; i
<10000; i
++) /* udelay isn't working yet at this point! */
373 vfd_board_id
= (~gpio
->PCDAT
) & 0x000F; /* read GPC0...GPC3 port pins */
375 VFD_DISABLE
; /* activate blank for the vfd */
381 /* If new board revision, then use PWM 3 as cpld-clock */
382 /* Enable 500 Hz timer for fill level sensor to operate properly */
383 /* Configure TOUT3 as functional pin, disable pull-up */
384 gpio
->PDCON
&= ~0x30000;
385 gpio
->PDCON
|= 0x20000;
386 gpio
->PDUP
|= (1 << 8);
388 /* Configure the prescaler */
389 timers
->TCFG0
&= ~0xff00;
390 timers
->TCFG0
|= 0x0f00;
392 /* Select MUX input (divider) for timer3 (1/16) */
393 timers
->TCFG1
&= ~0xf000;
394 timers
->TCFG1
|= 0x3000;
396 /* Enable autoreload and set the counter and compare
397 * registers to values for the 500 Hz clock
398 * (for a given prescaler (15) and divider (16)):
399 * counter = (66000000 / 500) >> 9;
401 timers
->ch
[3].TCNTB
= 0x101;
402 timers
->ch
[3].TCMPB
= 0x101 / 2;
405 timers
->TCON
= (timers
->TCON
| UPDATE3
| RELOAD3
) & ~INVERT3
;
406 timers
->TCON
= (timers
->TCON
| START3
) & ~UPDATE3
;
409 /* If old board revision, then use vm-signal as cpld-clock */
410 lcd
->LCDCON2
= 0x00FFC000;
411 lcd
->LCDCON3
= 0x0007FF00;
412 lcd
->LCDCON4
= 0x00000000;
413 lcd
->LCDCON5
= 0x00000400;
414 lcd
->LCDCON1
= 0x00000B75;
415 /* VM (GPD1) is used as clock for the CPLD */
416 gpio
->PDCON
= (gpio
->PDCON
& 0xFFFFFFF3) | 0x00000008;
422 * initialize LCD-Controller of the S3C2400 for using VFDs
424 * VFD detection depends on the board revision:
425 * starting from Rev. 200 a type code can be read from the data pins,
426 * driven by some pull-up resistors; all earlier systems must be
427 * manually configured. The type is set in the "vfd_type" environment
430 int drv_vfd_init(void)
432 struct s3c24x0_lcd
* const lcd
= s3c24x0_get_base_lcd();
433 struct s3c24x0_gpio
* const gpio
= s3c24x0_get_base_gpio();
436 static int vfd_init_done
= 0;
437 int vfd_inv_data
= 0;
439 if (vfd_init_done
!= 0)
443 debug("Detecting Revison of WA4-VFD: ID=0x%X\n", vfd_board_id
);
445 switch (vfd_board_id
) {
446 case 0: /* board revision < Rev.200 */
447 if ((tmp
= getenv ("vfd_type")) == NULL
) {
450 if (strcmp(tmp
, "T119C") == 0) {
451 gd
->vfd_type
= VFD_TYPE_T119C
;
452 } else if (strcmp(tmp
, "MN11236") == 0) {
453 gd
->vfd_type
= VFD_TYPE_MN11236
;
455 /* cannot use printf for a warning here */
456 gd
->vfd_type
= 0; /* unknown */
460 default: /* default to MN11236, data inverted */
461 gd
->vfd_type
= VFD_TYPE_MN11236
;
463 setenv ("vfd_type", "MN11236");
465 debug ("VFD type: %s%s\n",
466 (gd
->vfd_type
== VFD_TYPE_T119C
) ? "T119C" :
467 (gd
->vfd_type
== VFD_TYPE_MN11236
) ? "MN11236" :
469 vfd_inv_data
? ", inverted data" : "");
471 gd
->fb_base
= gd
->fb_base
;
475 for (palette
=0; palette
< 16; palette
++)
476 (*(volatile unsigned int*)(PALETTE
+(palette
*4)))=palette
;
477 for (palette
=16; palette
< 256; palette
++)
478 (*(volatile unsigned int*)(PALETTE
+(palette
*4)))=0x00;
481 * Hinweis: Der Framebuffer ist um genau ein Nibble verschoben
482 * Das erste angezeigte Pixel wird aus dem zweiten Nibble geholt
483 * das letzte angezeigte Pixel wird aus dem ersten Nibble geholt
487 /* Stopp LCD-Controller */
488 lcd
->LCDCON1
= 0x00000000;
489 /* frame buffer startadr */
490 lcd
->LCDSADDR1
= gd
->fb_base
>> 1;
491 /* frame buffer endadr */
492 lcd
->LCDSADDR2
= (gd
->fb_base
+ FRAME_BUF_SIZE
) >> 1;
493 lcd
->LCDSADDR3
= ((256/4));
494 lcd
->LCDCON2
= 0x000DC000;
495 if(gd
->vfd_type
== VFD_TYPE_MN11236
)
496 lcd
->LCDCON2
= 37 << 14; /* MN11236: 38 lines */
498 lcd
->LCDCON2
= 55 << 14; /* T119C: 56 lines */
499 lcd
->LCDCON3
= 0x0051000A;
500 lcd
->LCDCON4
= 0x00000001;
501 if (gd
->vfd_type
&& vfd_inv_data
)
502 lcd
->LCDCON5
= 0x000004C0;
504 lcd
->LCDCON5
= 0x00000440;
506 /* Port pins as LCD output */
507 gpio
->PCCON
= (gpio
->PCCON
& 0xFFFFFF00)| 0x000000AA;
508 gpio
->PDCON
= (gpio
->PDCON
& 0xFFFFFF03)| 0x000000A8;
510 /* Synchronize VFD enable with LCD controller to avoid flicker */
511 lcd
->LCDCON1
= 0x00000B75; /* Start LCD-Controller */
512 while((lcd
->LCDCON5
& 0x180000)!=0x100000); /* Wait for end of VSYNC */
513 while((lcd
->LCDCON5
& 0x060000)!=0x040000); /* Wait for next HSYNC */
514 while((lcd
->LCDCON5
& 0x060000)==0x040000);
515 while((lcd
->LCDCON5
& 0x060000)!=0x000000);
519 debug ("LCDSADDR1: %lX\n", lcd
->LCDSADDR1
);
520 debug ("LCDSADDR2: %lX\n", lcd
->LCDSADDR2
);
521 debug ("LCDSADDR3: %lX\n", lcd
->LCDSADDR3
);
527 * Disable VFD: should be run before resetting the system:
528 * disable VM, enable pull-up
530 void disable_vfd (void)
532 struct s3c24x0_gpio
* const gpio
= s3c24x0_get_base_gpio();
539 /************************************************************************/
540 /* ** ROM capable initialization part - needed to reserve FB memory */
541 /************************************************************************/
544 * This is called early in the system initialization to grab memory
545 * for the VFD controller.
547 * Note that this is running from ROM, so no write access to global data.
549 ulong
vfd_setmem (ulong addr
)
553 /* Round up to nearest full page */
554 size
= (FRAME_BUF_SIZE
+ (PAGE_SIZE
- 1)) & ~(PAGE_SIZE
- 1);
556 debug ("Reserving %ldk for VFD Framebuffer at: %08lx\n", size
>>10, addr
);
562 * Calculate fb size for VIDEOLFB_ATAG. Size returned contains fb,
563 * descriptors and palette areas.
565 ulong
calc_fbsize (void)
567 return FRAME_BUF_SIZE
;
570 #endif /* CONFIG_VFD */