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_SIZE ((256*4*56)/8)
60 #define frame_buf_offs 4
62 /* Supported VFD Types */
63 #define VFD_TYPE_T119C 1 /* Noritake T119C VFD */
64 #define VFD_TYPE_MN11236 2
66 /* taken from armboot/common/vfd.c */
67 unsigned long adr_vfd_table[112][18][2][4][2];
68 unsigned char bit_vfd_table[112][18][2][4][2];
71 * initialize the values for the VFD-grid-control in the framebuffer
73 void init_grid_ctrl(void)
75 DECLARE_GLOBAL_DATA_PTR;
76 ulong adr, grid_cycle;
77 unsigned int bit, display;
78 unsigned char temp, bit_nr;
81 * clear frame buffer (logical clear => set to "black")
83 memset ((void *)(gd->fb_base),
84 gd->vfd_inv_data ? 0xFF : 0,
87 switch (gd->vfd_type) {
89 for (display=0; display<4; display++) {
90 for(grid_cycle=0; grid_cycle<56; grid_cycle++) {
91 bit = grid_cycle * 256 * 4 +
92 (grid_cycle + 200) * 4 +
93 frame_buf_offs + display;
94 /* wrap arround if offset (see manual S3C2400) */
95 if (bit>=FRAME_BUF_SIZE*8)
96 bit = bit - (FRAME_BUF_SIZE * 8);
97 adr = gd->fb_base + (bit/32) * 4 + (3 - (bit%32) / 8);
99 bit_nr = (bit_nr > 3) ? bit_nr-4 : bit_nr+4;
100 temp=(*(volatile unsigned char*)(adr));
101 if (gd->vfd_inv_data)
102 temp &= ~(1<<bit_nr);
105 (*(volatile unsigned char*)(adr))=temp;
108 bit = grid_cycle*256*4+(grid_cycle+201)*4+frame_buf_offs+display;
110 bit = grid_cycle*256*4+200*4+frame_buf_offs+display-4; /* grid nr. 0 */
111 /* wrap arround if offset (see manual S3C2400) */
112 if (bit>=FRAME_BUF_SIZE*8)
113 bit = bit-(FRAME_BUF_SIZE*8);
114 adr = gd->fb_base+(bit/32)*4+(3-(bit%32)/8);
116 bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
117 temp=(*(volatile unsigned char*)(adr));
118 if (gd->vfd_inv_data)
119 temp &= ~(1<<bit_nr);
122 (*(volatile unsigned char*)(adr))=temp;
126 case VFD_TYPE_MN11236:
127 for (display=0; display<4; display++) {
128 for (grid_cycle=0; grid_cycle<38; grid_cycle++) {
129 bit = grid_cycle * 256 * 4 +
130 (253 - grid_cycle) * 4 +
131 frame_buf_offs + display;
132 /* wrap arround if offset (see manual S3C2400) */
133 if (bit>=FRAME_BUF_SIZE*8)
134 bit = bit - (FRAME_BUF_SIZE * 8);
135 adr = gd->fb_base + (bit/32) * 4 + (3 - (bit%32) / 8);
137 bit_nr = (bit_nr > 3) ? bit_nr-4 : bit_nr+4;
138 temp=(*(volatile unsigned char*)(adr));
139 if (gd->vfd_inv_data)
140 temp &= ~(1<<bit_nr);
143 (*(volatile unsigned char*)(adr))=temp;
146 bit = grid_cycle*256*4+(252-grid_cycle)*4+frame_buf_offs+display;
148 /* wrap arround if offset (see manual S3C2400) */
149 if (bit>=FRAME_BUF_SIZE*8)
150 bit = bit-(FRAME_BUF_SIZE*8);
151 adr = gd->fb_base+(bit/32)*4+(3-(bit%32)/8);
153 bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
154 temp=(*(volatile unsigned char*)(adr));
155 if (gd->vfd_inv_data)
156 temp &= ~(1<<bit_nr);
159 (*(volatile unsigned char*)(adr))=temp;
164 printf ("Warning: unknown display type\n");
170 *create translation table for getting easy the right position in the
171 *physical framebuffer for some x/y-coordinates of the VFDs
173 void create_vfd_table(void)
175 DECLARE_GLOBAL_DATA_PTR;
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 if (vfd_table[x][y][color][display][entry]) {
256 pixel = vfd_table[x][y][color][display][entry] + frame_buf_offs;
258 * wrap arround if offset
259 * (see manual S3C2400)
261 if (pixel>=FRAME_BUF_SIZE*8)
262 pixel = pixel-(FRAME_BUF_SIZE*8);
263 adr = gd->fb_base+(pixel/32)*4+(3-(pixel%32)/8);
265 bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
267 adr_vfd_table[x][y][color][display][entry] = adr;
268 bit_vfd_table[x][y][color][display][entry] = bit_nr;
277 * Set/clear pixel of the VFDs
279 void set_vfd_pixel(unsigned char x, unsigned char y,
280 unsigned char color, unsigned char display,
283 DECLARE_GLOBAL_DATA_PTR;
285 unsigned char bit_nr, temp;
287 if (! gd->vfd_type) {
292 /* Pixel-Eintrag Nr. 1 */
293 adr = adr_vfd_table[x][y][color][display][0];
294 /* Pixel-Eintrag Nr. 1 */
295 bit_nr = bit_vfd_table[x][y][color][display][0];
296 temp=(*(volatile unsigned char*)(adr));
298 if (gd->vfd_inv_data) {
300 temp &= ~(1<<bit_nr);
307 temp &= ~(1<<bit_nr);
310 (*(volatile unsigned char*)(adr))=temp;
314 * transfer image from BMP-File
316 void transfer_pic(int display, unsigned char *adr, int height, int width)
321 for (; height > 0; height -= 18)
329 for (x = 0; x < width; x += 2)
332 set_vfd_pixel(x, y-1, 0, display, 0);
333 set_vfd_pixel(x, y-1, 1, display, 0);
334 if ((temp >> 4) == BLAU)
335 set_vfd_pixel(x, y-1, 0, display, 1);
336 else if ((temp >> 4) == ROT)
337 set_vfd_pixel(x, y-1, 1, display, 1);
338 else if ((temp >> 4) == VIOLETT)
340 set_vfd_pixel(x, y-1, 0, display, 1);
341 set_vfd_pixel(x, y-1, 1, display, 1);
343 set_vfd_pixel(x+1, y-1, 0, display, 0);
344 set_vfd_pixel(x+1, y-1, 1, display, 0);
345 if ((temp & 0x0F) == BLAU)
346 set_vfd_pixel(x+1, y-1, 0, display, 1);
347 else if ((temp & 0x0F) == ROT)
348 set_vfd_pixel(x+1, y-1, 1, display, 1);
349 else if ((temp & 0x0F) == VIOLETT)
351 set_vfd_pixel(x+1, y-1, 0, display, 1);
352 set_vfd_pixel(x+1, y-1, 1, display, 1);
363 * This function initializes VFD clock that is needed for the CPLD that
364 * manages the keyboard.
366 int vfd_init_clocks(void)
368 /* Port-Pins als LCD-Ausgang */
369 rPCCON = (rPCCON & 0xFFFFFF00)| 0x000000AA;
370 /* Port-Pins als LCD-Ausgang */
371 rPDCON = (rPDCON & 0xFFFFFF03)| 0x000000A8;
372 #ifdef CFG_WITH_VFRAME
373 /* mit VFRAME zum Messen */
374 rPDCON = (rPDCON & 0xFFFFFF00)| 0x000000AA;
377 rLCDCON2 = 0x000DC000;
378 rLCDCON3 = 0x0051000A;
379 rLCDCON4 = 0x00000001;
380 rLCDCON5 = 0x00000440;
381 rLCDCON1 = 0x00000B75;
387 * initialize LCD-Controller of the S3C2400 for using VFDs
389 * VFD detection depends on the board revision:
390 * starting from Rev. 200 a type code can be read from the data pins,
391 * driven by some pull-up resistors; all earlier systems must be
392 * manually configured. The type is set in the "vfd_type" environment
395 int drv_vfd_init(void)
399 static int vfd_init_done = 0;
402 DECLARE_GLOBAL_DATA_PTR;
404 if (vfd_init_done != 0)
408 /* try to determine display type from the value
409 * defined by pull-ups
411 rPCUP = (rPCUP & 0xFFF0); /* activate GPC0...GPC3 pullups */
412 rPCCON = (rPCCON & 0xFFFFFF00); /* configure GPC0...GPC3 as inputs */
413 udelay(10); /* allow signals to settle */
415 vfd_id = (~rPCDAT) & 0x000F; /* read GPC0...GPC3 port pins */
416 debug("Detecting Revison of WA4-VFD: ID=0x%X\n", vfd_id);
419 case 0: /* board revision < Rev.200 */
420 if ((tmp = getenv ("vfd_type")) == NULL) {
423 if (strcmp(tmp, "T119C") == 0) {
424 gd->vfd_type = VFD_TYPE_T119C;
425 } else if (strcmp(tmp, "MN11236") == 0) {
426 gd->vfd_type = VFD_TYPE_MN11236;
428 /* cannot use printf for a warning here */
429 gd->vfd_type = 0; /* unknown */
431 gd->vfd_inv_data = 0;
434 default: /* default to MN11236, data inverted */
435 gd->vfd_type = VFD_TYPE_MN11236;
436 gd->vfd_inv_data = 1;
437 setenv ("vfd_type", "MN11236");
439 debug ("VFD type: %s%s\n",
440 (gd->vfd_type == VFD_TYPE_T119C) ? "T119C" :
441 (gd->vfd_type == VFD_TYPE_MN11236) ? "MN11236" :
443 gd->vfd_inv_data ? ", inverted data" : "");
445 gd->fb_base = gd->fb_base;
449 for (palette=0; palette < 16; palette++)
450 (*(volatile unsigned int*)(PALETTE+(palette*4)))=palette;
451 for (palette=16; palette < 256; palette++)
452 (*(volatile unsigned int*)(PALETTE+(palette*4)))=0x00;
455 * Hinweis: Der Framebuffer ist um genau ein Nibble verschoben
456 * Das erste angezeigte Pixel wird aus dem zweiten Nibble geholt
457 * das letzte angezeigte Pixel wird aus dem ersten Nibble geholt
461 /* frame buffer startadr */
462 rLCDSADDR1 = gd->fb_base >> 1;
463 /* frame buffer endadr */
464 rLCDSADDR2 = (gd->fb_base + FRAME_BUF_SIZE) >> 1;
465 rLCDSADDR3 = ((256/4));
467 debug ("LCDSADDR1: %lX\n", rLCDSADDR1);
468 debug ("LCDSADDR2: %lX\n", rLCDSADDR2);
469 debug ("LCDSADDR3: %lX\n", rLCDSADDR3);
474 /************************************************************************/
475 /* ** ROM capable initialization part - needed to reserve FB memory */
476 /************************************************************************/
479 * This is called early in the system initialization to grab memory
480 * for the VFD controller.
482 * Note that this is running from ROM, so no write access to global data.
484 ulong vfd_setmem (ulong addr)
488 /* Round up to nearest full page */
489 size = (FRAME_BUF_SIZE + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
491 debug ("Reserving %ldk for VFD Framebuffer at: %08lx\n", size>>10, addr);
496 #endif /* CONFIG_VFD */