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>
44 /************************************************************************/
45 /* ** CONFIG STUFF -- should be moved to board config file */
46 /************************************************************************/
48 /************************************************************************/
51 #define PAGE_SIZE 4096
59 #define frame_buf_offs 4
61 /* Supported VFD Types */
62 #define VFD_TYPE_T119C 1 /* Noritake T119C VFD */
63 #define VFD_TYPE_MN11236 2
65 /* taken from armboot/common/vfd.c */
66 unsigned long adr_vfd_table[112][18][2][4][2];
67 unsigned char bit_vfd_table[112][18][2][4][2];
70 * initialize the values for the VFD-grid-control in the framebuffer
72 void init_grid_ctrl(void)
74 DECLARE_GLOBAL_DATA_PTR;
75 ulong adr, grid_cycle;
76 unsigned int bit, display;
77 unsigned char temp, bit_nr;
81 * clear frame buffer (logical clear => set to "black")
83 if (gd->vfd_inv_data == 0)
88 for (adr = gd->fb_base; adr <= (gd->fb_base+7168); adr += 4) {
89 (*(volatile ulong*)(adr)) = val;
92 switch (gd->vfd_type) {
94 for (display=0; display<4; display++) {
95 for(grid_cycle=0; grid_cycle<56; grid_cycle++) {
96 bit = grid_cycle * 256 * 4 +
97 (grid_cycle + 200) * 4 +
98 frame_buf_offs + display;
99 /* wrap arround if offset (see manual S3C2400) */
100 if (bit>=frame_buf_size*8)
101 bit = bit - (frame_buf_size * 8);
102 adr = gd->fb_base + (bit/32) * 4 + (3 - (bit%32) / 8);
104 bit_nr = (bit_nr > 3) ? bit_nr-4 : bit_nr+4;
105 temp=(*(volatile unsigned char*)(adr));
106 if (gd->vfd_inv_data)
107 temp &= ~(1<<bit_nr);
110 (*(volatile unsigned char*)(adr))=temp;
113 bit = grid_cycle*256*4+(grid_cycle+201)*4+frame_buf_offs+display;
115 bit = grid_cycle*256*4+200*4+frame_buf_offs+display-4; /* grid nr. 0 */
116 /* wrap arround if offset (see manual S3C2400) */
117 if (bit>=frame_buf_size*8)
118 bit = bit-(frame_buf_size*8);
119 adr = gd->fb_base+(bit/32)*4+(3-(bit%32)/8);
121 bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
122 temp=(*(volatile unsigned char*)(adr));
123 if (gd->vfd_inv_data)
124 temp &= ~(1<<bit_nr);
127 (*(volatile unsigned char*)(adr))=temp;
131 case VFD_TYPE_MN11236:
132 for (display=0; display<4; display++) {
133 for (grid_cycle=0; grid_cycle<38; grid_cycle++) {
134 bit = grid_cycle * 256 * 4 +
135 (253 - grid_cycle) * 4 +
136 frame_buf_offs + display;
137 /* wrap arround if offset (see manual S3C2400) */
138 if (bit>=frame_buf_size*8)
139 bit = bit - (frame_buf_size * 8);
140 adr = gd->fb_base + (bit/32) * 4 + (3 - (bit%32) / 8);
142 bit_nr = (bit_nr > 3) ? bit_nr-4 : bit_nr+4;
143 temp=(*(volatile unsigned char*)(adr));
144 if (gd->vfd_inv_data)
145 temp &= ~(1<<bit_nr);
148 (*(volatile unsigned char*)(adr))=temp;
151 bit = grid_cycle*256*4+(252-grid_cycle)*4+frame_buf_offs+display;
153 /* wrap arround if offset (see manual S3C2400) */
154 if (bit>=frame_buf_size*8)
155 bit = bit-(frame_buf_size*8);
156 adr = gd->fb_base+(bit/32)*4+(3-(bit%32)/8);
158 bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
159 temp=(*(volatile unsigned char*)(adr));
160 if (gd->vfd_inv_data)
161 temp &= ~(1<<bit_nr);
164 (*(volatile unsigned char*)(adr))=temp;
169 printf ("Warning: unknown display type\n");
175 *create translation table for getting easy the right position in the
176 *physical framebuffer for some x/y-coordinates of the VFDs
178 void create_vfd_table(void)
180 DECLARE_GLOBAL_DATA_PTR;
181 unsigned long vfd_table[112][18][2][4][2];
182 unsigned int x, y, color, display, entry, pixel;
183 unsigned int x_abcdef = 0;
185 switch (gd->vfd_type) {
187 for(y=0; y<=17; y++) { /* Line */
188 for(x=0; x<=111; x++) { /* Column */
189 for(display=0; display <=3; display++) {
191 /* Display 0 blue pixels */
192 vfd_table[x][y][0][display][0] =
193 (x==0) ? y*16+display
194 : (x%4)*4+y*16+((x-1)/2)*1024+display;
195 /* Display 0 red pixels */
196 vfd_table[x][y][1][display][0] =
197 (x==0) ? y*16+512+display
198 : (x%4)*4+y*16+((x-1)/2)*1024+512+display;
203 case VFD_TYPE_MN11236:
204 for(y=0; y<=17; y++) { /* Line */
205 for(x=0; x<=111; x++) { /* Column */
206 for(display=0; display <=3; display++) {
208 vfd_table[x][y][0][display][0]=0;
209 vfd_table[x][y][0][display][1]=0;
210 vfd_table[x][y][1][display][0]=0;
211 vfd_table[x][y][1][display][1]=0;
214 case 0: x_abcdef=0; break; /* a -> a */
215 case 1: x_abcdef=2; break; /* b -> c */
216 case 2: x_abcdef=4; break; /* c -> e */
217 case 3: x_abcdef=5; break; /* d -> f */
218 case 4: x_abcdef=3; break; /* e -> d */
219 case 5: x_abcdef=1; break; /* f -> b */
223 vfd_table[x][y][0][display][0] =
224 (x>1) ? x_abcdef*4+((x-1)/3)*1024+y*48+display
225 : x_abcdef*4+ 0+y*48+display;
228 vfd_table[x][y][0][display][1] = x_abcdef*4+((x-1)/3+1)*1024+y*48+display;
231 vfd_table[x][y][1][display][0] =
232 (x>1) ? x_abcdef*4+24+((x-1)/3)*1024+y*48+display
233 : x_abcdef*4+24+ 0+y*48+display;
236 vfd_table[x][y][1][display][1] = x_abcdef*4+24+((x-1)/3+1)*1024+y*48+display;
247 * Create table with entries for physical byte adresses and
248 * bit-number within the byte
249 * from table with bit-numbers within the total framebuffer
253 for(color=0;color<2;color++) {
254 for(display=0;display<4;display++) {
255 for(entry=0;entry<2;entry++) {
256 unsigned long adr = gd->fb_base;
257 unsigned int bit_nr = 0;
259 if (vfd_table[x][y][color][display][entry]) {
261 pixel = vfd_table[x][y][color][display][entry] + frame_buf_offs;
263 * wrap arround if offset
264 * (see manual S3C2400)
266 if (pixel>=frame_buf_size*8)
267 pixel = pixel-(frame_buf_size*8);
268 adr = gd->fb_base+(pixel/32)*4+(3-(pixel%32)/8);
270 bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
272 adr_vfd_table[x][y][color][display][entry] = adr;
273 bit_vfd_table[x][y][color][display][entry] = bit_nr;
282 * Set/clear pixel of the VFDs
284 void set_vfd_pixel(unsigned char x, unsigned char y,
285 unsigned char color, unsigned char display,
288 DECLARE_GLOBAL_DATA_PTR;
290 unsigned char bit_nr, temp;
292 if (! gd->vfd_type) {
297 /* Pixel-Eintrag Nr. 1 */
298 adr = adr_vfd_table[x][y][color][display][0];
299 /* Pixel-Eintrag Nr. 1 */
300 bit_nr = bit_vfd_table[x][y][color][display][0];
301 temp=(*(volatile unsigned char*)(adr));
303 if (gd->vfd_inv_data) {
305 temp &= ~(1<<bit_nr);
312 temp &= ~(1<<bit_nr);
315 (*(volatile unsigned char*)(adr))=temp;
319 * transfer image from BMP-File
321 void transfer_pic(int display, unsigned char *adr, int height, int width)
326 for (; height > 0; height -= 18)
334 for (x = 0; x < width; x += 2)
337 set_vfd_pixel(x, y-1, 0, display, 0);
338 set_vfd_pixel(x, y-1, 1, display, 0);
339 if ((temp >> 4) == BLAU)
340 set_vfd_pixel(x, y-1, 0, display, 1);
341 else if ((temp >> 4) == ROT)
342 set_vfd_pixel(x, y-1, 1, display, 1);
343 else if ((temp >> 4) == VIOLETT)
345 set_vfd_pixel(x, y-1, 0, display, 1);
346 set_vfd_pixel(x, y-1, 1, display, 1);
348 set_vfd_pixel(x+1, y-1, 0, display, 0);
349 set_vfd_pixel(x+1, y-1, 1, display, 0);
350 if ((temp & 0x0F) == BLAU)
351 set_vfd_pixel(x+1, y-1, 0, display, 1);
352 else if ((temp & 0x0F) == ROT)
353 set_vfd_pixel(x+1, y-1, 1, display, 1);
354 else if ((temp & 0x0F) == VIOLETT)
356 set_vfd_pixel(x+1, y-1, 0, display, 1);
357 set_vfd_pixel(x+1, y-1, 1, display, 1);
368 * This function initializes VFD clock that is needed for the CPLD that
369 * manages the keyboard.
371 int vfd_init_clocks(void)
373 /* Port-Pins als LCD-Ausgang */
374 rPCCON = (rPCCON & 0xFFFFFF00)| 0x000000AA;
375 /* Port-Pins als LCD-Ausgang */
376 rPDCON = (rPDCON & 0xFFFFFF03)| 0x000000A8;
377 #ifdef CFG_WITH_VFRAME
378 /* mit VFRAME zum Messen */
379 rPDCON = (rPDCON & 0xFFFFFF00)| 0x000000AA;
382 rLCDCON2 = 0x000DC000;
383 rLCDCON3 = 0x0051000A;
384 rLCDCON4 = 0x00000001;
385 rLCDCON5 = 0x00000440;
386 rLCDCON1 = 0x00000B75;
392 * initialize LCD-Controller of the S3C2400 for using VFDs
394 * VFD detection depends on the board revision:
395 * starting from Rev. 200 a type code can be read from the data pins,
396 * driven by some pull-up resistors; all earlier systems must be
397 * manually configured. The type is set in the "vfd_type" environment
400 int drv_vfd_init(void)
404 static int vfd_init_done = 0;
407 DECLARE_GLOBAL_DATA_PTR;
409 if (vfd_init_done != 0)
413 /* try to determine display type from the value
414 * defined by pull-ups
416 rPCUP = (rPCUP & 0xFFF0); /* activate GPC0...GPC3 pullups */
417 rPCCON = (rPCCON & 0xFFFFFF00); /* configure GPC0...GPC3 as inputs */
418 udelay(10); /* allow signals to settle */
420 vfd_id = (~rPCDAT) & 0x000F; /* read GPC0...GPC3 port pins */
421 debug("Detecting Revison of WA4-VFD: ID=0x%X\n", vfd_id);
424 case 0: /* board revision < Rev.200 */
425 if ((tmp = getenv ("vfd_type")) == NULL) {
428 if (strcmp(tmp, "T119C") == 0) {
429 gd->vfd_type = VFD_TYPE_T119C;
430 } else if (strcmp(tmp, "MN11236") == 0) {
431 gd->vfd_type = VFD_TYPE_MN11236;
433 /* cannot use printf for a warning here */
434 gd->vfd_type = 0; /* unknown */
436 gd->vfd_inv_data = 0;
439 default: /* default to MN11236, data inverted */
440 gd->vfd_type = VFD_TYPE_MN11236;
441 gd->vfd_inv_data = 1;
442 setenv ("vfd_type", "MN11236");
444 debug ("VFD type: %s%s\n",
445 (gd->vfd_type == VFD_TYPE_T119C) ? "T119C" :
446 (gd->vfd_type == VFD_TYPE_MN11236) ? "MN11236" :
448 gd->vfd_inv_data ? ", inverted data" : "");
450 gd->fb_base = gd->fb_base;
454 for (palette=0; palette < 16; palette++)
455 (*(volatile unsigned int*)(PALETTE+(palette*4)))=palette;
456 for (palette=16; palette < 256; palette++)
457 (*(volatile unsigned int*)(PALETTE+(palette*4)))=0x00;
460 * Hinweis: Der Framebuffer ist um genau ein Nibble verschoben
461 * Das erste angezeigte Pixel wird aus dem zweiten Nibble geholt
462 * das letzte angezeigte Pixel wird aus dem ersten Nibble geholt
466 /* frame buffer startadr */
467 rLCDSADDR1 = gd->fb_base >> 1;
468 /* frame buffer endadr */
469 rLCDSADDR2 = (gd->fb_base + frame_buf_size) >> 1;
470 rLCDSADDR3 = ((256/4));
472 debug ("LCDSADDR1: %lX\n", rLCDSADDR1);
473 debug ("LCDSADDR2: %lX\n", rLCDSADDR2);
474 debug ("LCDSADDR3: %lX\n", rLCDSADDR3);
479 /************************************************************************/
480 /* ** ROM capable initialization part - needed to reserve FB memory */
481 /************************************************************************/
484 * This is called early in the system initialization to grab memory
485 * for the VFD controller.
487 * Note that this is running from ROM, so no write access to global data.
489 ulong vfd_setmem (ulong addr)
494 frame_buf_size = (256*4*56)/8;
496 /* Round up to nearest full page */
497 size = (frame_buf_size + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
499 debug ("Reserving %ldk for VFD Framebuffer at: %08lx\n", size>>10, addr);
504 #endif /* CONFIG_VFD */