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-rw-r--r--u-boot/board/trab/vfd.c574
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diff --git a/u-boot/board/trab/vfd.c b/u-boot/board/trab/vfd.c
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+++ b/u-boot/board/trab/vfd.c
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+/*
+ * (C) Copyright 2001
+ * Wolfgang Denk, DENX Software Engineering -- wd@denx.de
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/************************************************************************/
+/* ** DEBUG SETTINGS */
+/************************************************************************/
+
+/* #define DEBUG */
+
+/************************************************************************/
+/* ** HEADER FILES */
+/************************************************************************/
+
+#include <config.h>
+#include <common.h>
+#include <version.h>
+#include <stdarg.h>
+#include <linux/types.h>
+#include <stdio_dev.h>
+#include <asm/arch/s3c24x0_cpu.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_VFD
+
+/************************************************************************/
+/* ** CONFIG STUFF -- should be moved to board config file */
+/************************************************************************/
+
+/************************************************************************/
+
+#ifndef PAGE_SIZE
+#define PAGE_SIZE 4096
+#endif
+
+#define ROT 0x09
+#define BLAU 0x0C
+#define VIOLETT 0X0D
+
+/* MAGIC */
+#define FRAME_BUF_SIZE ((256*4*56)/8)
+#define frame_buf_offs 4
+
+/* defines for starting Timer3 as CPLD-Clk */
+#define START3 (1 << 16)
+#define UPDATE3 (1 << 17)
+#define INVERT3 (1 << 18)
+#define RELOAD3 (1 << 19)
+
+/* CPLD-Register for controlling vfd-blank-signal */
+#define VFD_DISABLE (*(volatile uchar *)0x04038000=0x0000)
+#define VFD_ENABLE (*(volatile uchar *)0x04038000=0x0001)
+
+/* Supported VFD Types */
+#define VFD_TYPE_T119C 1 /* Noritake T119C VFD */
+#define VFD_TYPE_MN11236 2
+
+/*#define NEW_CPLD_CLK*/
+
+int vfd_board_id;
+
+/* taken from armboot/common/vfd.c */
+unsigned long adr_vfd_table[112][18][2][4][2];
+unsigned char bit_vfd_table[112][18][2][4][2];
+
+/*
+ * initialize the values for the VFD-grid-control in the framebuffer
+ */
+void init_grid_ctrl(void)
+{
+ ulong adr, grid_cycle;
+ unsigned int bit, display;
+ unsigned char temp, bit_nr;
+
+ /*
+ * clear frame buffer (logical clear => set to "black")
+ */
+ memset ((void *)(gd->fb_base), 0, FRAME_BUF_SIZE);
+
+ switch (gd->vfd_type) {
+ case VFD_TYPE_T119C:
+ for (display=0; display<4; display++) {
+ for(grid_cycle=0; grid_cycle<56; grid_cycle++) {
+ bit = grid_cycle * 256 * 4 +
+ (grid_cycle + 200) * 4 +
+ frame_buf_offs + display;
+ /* wrap arround if offset (see manual S3C2400) */
+ if (bit>=FRAME_BUF_SIZE*8)
+ bit = bit - (FRAME_BUF_SIZE * 8);
+ adr = gd->fb_base + (bit/32) * 4 + (3 - (bit%32) / 8);
+ bit_nr = bit % 8;
+ bit_nr = (bit_nr > 3) ? bit_nr-4 : bit_nr+4;
+ temp=(*(volatile unsigned char*)(adr));
+ temp |= (1<<bit_nr);
+ (*(volatile unsigned char*)(adr))=temp;
+
+ if(grid_cycle<55)
+ bit = grid_cycle*256*4+(grid_cycle+201)*4+frame_buf_offs+display;
+ else
+ bit = grid_cycle*256*4+200*4+frame_buf_offs+display-4; /* grid nr. 0 */
+ /* wrap arround if offset (see manual S3C2400) */
+ if (bit>=FRAME_BUF_SIZE*8)
+ bit = bit-(FRAME_BUF_SIZE*8);
+ adr = gd->fb_base+(bit/32)*4+(3-(bit%32)/8);
+ bit_nr = bit%8;
+ bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
+ temp=(*(volatile unsigned char*)(adr));
+ temp |= (1<<bit_nr);
+ (*(volatile unsigned char*)(adr))=temp;
+ }
+ }
+ break;
+ case VFD_TYPE_MN11236:
+ for (display=0; display<4; display++) {
+ for (grid_cycle=0; grid_cycle<38; grid_cycle++) {
+ bit = grid_cycle * 256 * 4 +
+ (253 - grid_cycle) * 4 +
+ frame_buf_offs + display;
+ /* wrap arround if offset (see manual S3C2400) */
+ if (bit>=FRAME_BUF_SIZE*8)
+ bit = bit - (FRAME_BUF_SIZE * 8);
+ adr = gd->fb_base + (bit/32) * 4 + (3 - (bit%32) / 8);
+ bit_nr = bit % 8;
+ bit_nr = (bit_nr > 3) ? bit_nr-4 : bit_nr+4;
+ temp=(*(volatile unsigned char*)(adr));
+ temp |= (1<<bit_nr);
+ (*(volatile unsigned char*)(adr))=temp;
+
+ if(grid_cycle<37)
+ bit = grid_cycle*256*4+(252-grid_cycle)*4+frame_buf_offs+display;
+
+ /* wrap arround if offset (see manual S3C2400) */
+ if (bit>=FRAME_BUF_SIZE*8)
+ bit = bit-(FRAME_BUF_SIZE*8);
+ adr = gd->fb_base+(bit/32)*4+(3-(bit%32)/8);
+ bit_nr = bit%8;
+ bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
+ temp=(*(volatile unsigned char*)(adr));
+ temp |= (1<<bit_nr);
+ (*(volatile unsigned char*)(adr))=temp;
+ }
+ }
+ break;
+ default:
+ printf ("Warning: unknown display type\n");
+ break;
+ }
+}
+
+/*
+ *create translation table for getting easy the right position in the
+ *physical framebuffer for some x/y-coordinates of the VFDs
+ */
+void create_vfd_table(void)
+{
+ unsigned long vfd_table[112][18][2][4][2];
+ unsigned int x, y, color, display, entry, pixel;
+ unsigned int x_abcdef = 0;
+
+ switch (gd->vfd_type) {
+ case VFD_TYPE_T119C:
+ for(y=0; y<=17; y++) { /* Line */
+ for(x=0; x<=111; x++) { /* Column */
+ for(display=0; display <=3; display++) {
+
+ /* Display 0 blue pixels */
+ vfd_table[x][y][0][display][0] =
+ (x==0) ? y*16+display
+ : (x%4)*4+y*16+((x-1)/2)*1024+display;
+ /* Display 0 red pixels */
+ vfd_table[x][y][1][display][0] =
+ (x==0) ? y*16+512+display
+ : (x%4)*4+y*16+((x-1)/2)*1024+512+display;
+ }
+ }
+ }
+ break;
+ case VFD_TYPE_MN11236:
+ for(y=0; y<=17; y++) { /* Line */
+ for(x=0; x<=111; x++) { /* Column */
+ for(display=0; display <=3; display++) {
+
+ vfd_table[x][y][0][display][0]=0;
+ vfd_table[x][y][0][display][1]=0;
+ vfd_table[x][y][1][display][0]=0;
+ vfd_table[x][y][1][display][1]=0;
+
+ switch (x%6) {
+ case 0: x_abcdef=0; break; /* a -> a */
+ case 1: x_abcdef=2; break; /* b -> c */
+ case 2: x_abcdef=4; break; /* c -> e */
+ case 3: x_abcdef=5; break; /* d -> f */
+ case 4: x_abcdef=3; break; /* e -> d */
+ case 5: x_abcdef=1; break; /* f -> b */
+ }
+
+ /* blue pixels */
+ vfd_table[x][y][0][display][0] =
+ (x>1) ? x_abcdef*4+((x-1)/3)*1024+y*48+display
+ : x_abcdef*4+ 0+y*48+display;
+ /* blue pixels */
+ if (x>1 && (x-1)%3)
+ vfd_table[x][y][0][display][1] = x_abcdef*4+((x-1)/3+1)*1024+y*48+display;
+
+ /* red pixels */
+ vfd_table[x][y][1][display][0] =
+ (x>1) ? x_abcdef*4+24+((x-1)/3)*1024+y*48+display
+ : x_abcdef*4+24+ 0+y*48+display;
+ /* red pixels */
+ if (x>1 && (x-1)%3)
+ vfd_table[x][y][1][display][1] = x_abcdef*4+24+((x-1)/3+1)*1024+y*48+display;
+ }
+ }
+ }
+ break;
+ default:
+ /* do nothing */
+ return;
+ }
+
+ /*
+ * Create table with entries for physical byte adresses and
+ * bit-number within the byte
+ * from table with bit-numbers within the total framebuffer
+ */
+ for(y=0;y<18;y++) {
+ for(x=0;x<112;x++) {
+ for(color=0;color<2;color++) {
+ for(display=0;display<4;display++) {
+ for(entry=0;entry<2;entry++) {
+ unsigned long adr = gd->fb_base;
+ unsigned int bit_nr = 0;
+
+ pixel = vfd_table[x][y][color][display][entry] + frame_buf_offs;
+ /*
+ * wrap arround if offset
+ * (see manual S3C2400)
+ */
+ if (pixel>=FRAME_BUF_SIZE*8)
+ pixel = pixel-(FRAME_BUF_SIZE*8);
+ adr = gd->fb_base+(pixel/32)*4+(3-(pixel%32)/8);
+ bit_nr = pixel%8;
+ bit_nr = (bit_nr>3)?bit_nr-4:bit_nr+4;
+
+ adr_vfd_table[x][y][color][display][entry] = adr;
+ bit_vfd_table[x][y][color][display][entry] = bit_nr;
+ }
+ }
+ }
+ }
+ }
+}
+
+/*
+ * Set/clear pixel of the VFDs
+ */
+void set_vfd_pixel(unsigned char x, unsigned char y,
+ unsigned char color, unsigned char display,
+ unsigned char value)
+{
+ ulong adr;
+ unsigned char bit_nr, temp;
+
+ if (! gd->vfd_type) {
+ /* Unknown type. */
+ return;
+ }
+
+ /* Pixel-Eintrag Nr. 1 */
+ adr = adr_vfd_table[x][y][color][display][0];
+ /* Pixel-Eintrag Nr. 1 */
+ bit_nr = bit_vfd_table[x][y][color][display][0];
+ temp=(*(volatile unsigned char*)(adr));
+
+ if (value)
+ temp |= (1<<bit_nr);
+ else
+ temp &= ~(1<<bit_nr);
+
+ (*(volatile unsigned char*)(adr))=temp;
+}
+
+/*
+ * transfer image from BMP-File
+ */
+void transfer_pic(int display, unsigned char *adr, int height, int width)
+{
+ int x, y;
+ unsigned char temp;
+
+ for (; height > 0; height -= 18)
+ {
+ if (height > 18)
+ y = 18;
+ else
+ y = height;
+ for (; y > 0; y--)
+ {
+ for (x = 0; x < width; x += 2)
+ {
+ temp = *adr++;
+ set_vfd_pixel(x, y-1, 0, display, 0);
+ set_vfd_pixel(x, y-1, 1, display, 0);
+ if ((temp >> 4) == BLAU)
+ set_vfd_pixel(x, y-1, 0, display, 1);
+ else if ((temp >> 4) == ROT)
+ set_vfd_pixel(x, y-1, 1, display, 1);
+ else if ((temp >> 4) == VIOLETT)
+ {
+ set_vfd_pixel(x, y-1, 0, display, 1);
+ set_vfd_pixel(x, y-1, 1, display, 1);
+ }
+ set_vfd_pixel(x+1, y-1, 0, display, 0);
+ set_vfd_pixel(x+1, y-1, 1, display, 0);
+ if ((temp & 0x0F) == BLAU)
+ set_vfd_pixel(x+1, y-1, 0, display, 1);
+ else if ((temp & 0x0F) == ROT)
+ set_vfd_pixel(x+1, y-1, 1, display, 1);
+ else if ((temp & 0x0F) == VIOLETT)
+ {
+ set_vfd_pixel(x+1, y-1, 0, display, 1);
+ set_vfd_pixel(x+1, y-1, 1, display, 1);
+ }
+ }
+ }
+ if (display > 0)
+ display--;
+ else
+ display = 3;
+ }
+}
+
+/*
+ * This function initializes VFD clock that is needed for the CPLD that
+ * manages the keyboard.
+ */
+int vfd_init_clocks (void)
+{
+ int i;
+
+ struct s3c24x0_gpio * const gpio = s3c24x0_get_base_gpio();
+ struct s3c24x0_timers * const timers = s3c24x0_get_base_timers();
+ struct s3c24x0_lcd * const lcd = s3c24x0_get_base_lcd();
+
+ /* try to determine display type from the value
+ * defined by pull-ups
+ */
+ gpio->pcup = (gpio->pcup & 0xFFF0); /* activate GPC0...GPC3 pullups */
+ gpio->pccon = (gpio->pccon & 0xFFFFFF00); /* cfg GPC0...GPC3 inputs */
+ /* allow signals to settle */
+ for (i=0; i<10000; i++) /* udelay isn't working yet at this point! */
+ __asm__("NOP");
+ vfd_board_id = (~gpio->pcdat) & 0x000F; /* read GPC0...GPC3 port pins */
+
+ VFD_DISABLE; /* activate blank for the vfd */
+
+#define NEW_CPLD_CLK
+
+#ifdef NEW_CPLD_CLK
+ if (vfd_board_id) {
+ /* If new board revision, then use PWM 3 as cpld-clock */
+ /* Enable 500 Hz timer for fill level sensor to operate properly */
+ /* Configure TOUT3 as functional pin, disable pull-up */
+ gpio->pdcon &= ~0x30000;
+ gpio->pdcon |= 0x20000;
+ gpio->pdup |= (1 << 8);
+
+ /* Configure the prescaler */
+ timers->tcfg0 &= ~0xff00;
+ timers->tcfg0 |= 0x0f00;
+
+ /* Select MUX input (divider) for timer3 (1/16) */
+ timers->tcfg1 &= ~0xf000;
+ timers->tcfg1 |= 0x3000;
+
+ /* Enable autoreload and set the counter and compare
+ * registers to values for the 500 Hz clock
+ * (for a given prescaler (15) and divider (16)):
+ * counter = (66000000 / 500) >> 9;
+ */
+ timers->ch[3].tcntb = 0x101;
+ timers->ch[3].tcmpb = 0x101 / 2;
+
+ /* Start timer */
+ timers->tcon = (timers->tcon | UPDATE3 | RELOAD3) & ~INVERT3;
+ timers->tcon = (timers->tcon | START3) & ~UPDATE3;
+ }
+#endif
+ /* If old board revision, then use vm-signal as cpld-clock */
+ lcd->lcdcon2 = 0x00FFC000;
+ lcd->lcdcon3 = 0x0007FF00;
+ lcd->lcdcon4 = 0x00000000;
+ lcd->lcdcon5 = 0x00000400;
+ lcd->lcdcon1 = 0x00000B75;
+ /* VM (GPD1) is used as clock for the CPLD */
+ gpio->pdcon = (gpio->pdcon & 0xFFFFFFF3) | 0x00000008;
+
+ return 0;
+}
+
+/*
+ * initialize LCD-Controller of the S3C2400 for using VFDs
+ *
+ * VFD detection depends on the board revision:
+ * starting from Rev. 200 a type code can be read from the data pins,
+ * driven by some pull-up resistors; all earlier systems must be
+ * manually configured. The type is set in the "vfd_type" environment
+ * variable.
+ */
+int drv_vfd_init(void)
+{
+ struct s3c24x0_lcd * const lcd = s3c24x0_get_base_lcd();
+ struct s3c24x0_gpio * const gpio = s3c24x0_get_base_gpio();
+ char *tmp;
+ ulong palette;
+ static int vfd_init_done = 0;
+ int vfd_inv_data = 0;
+
+ if (vfd_init_done != 0)
+ return (0);
+ vfd_init_done = 1;
+
+ debug("Detecting Revison of WA4-VFD: ID=0x%X\n", vfd_board_id);
+
+ switch (vfd_board_id) {
+ case 0: /* board revision < Rev.200 */
+ if ((tmp = getenv ("vfd_type")) == NULL) {
+ break;
+ }
+ if (strcmp(tmp, "T119C") == 0) {
+ gd->vfd_type = VFD_TYPE_T119C;
+ } else if (strcmp(tmp, "MN11236") == 0) {
+ gd->vfd_type = VFD_TYPE_MN11236;
+ } else {
+ /* cannot use printf for a warning here */
+ gd->vfd_type = 0; /* unknown */
+ }
+
+ break;
+ default: /* default to MN11236, data inverted */
+ gd->vfd_type = VFD_TYPE_MN11236;
+ vfd_inv_data = 1;
+ setenv ("vfd_type", "MN11236");
+ }
+ debug ("VFD type: %s%s\n",
+ (gd->vfd_type == VFD_TYPE_T119C) ? "T119C" :
+ (gd->vfd_type == VFD_TYPE_MN11236) ? "MN11236" :
+ "unknown",
+ vfd_inv_data ? ", inverted data" : "");
+
+ gd->fb_base = gd->fb_base;
+ create_vfd_table();
+ init_grid_ctrl();
+
+ for (palette=0; palette < 16; palette++)
+ (*(volatile unsigned int*)(PALETTE+(palette*4)))=palette;
+ for (palette=16; palette < 256; palette++)
+ (*(volatile unsigned int*)(PALETTE+(palette*4)))=0x00;
+
+ /*
+ * Hinweis: Der Framebuffer ist um genau ein Nibble verschoben
+ * Das erste angezeigte Pixel wird aus dem zweiten Nibble geholt
+ * das letzte angezeigte Pixel wird aus dem ersten Nibble geholt
+ * (wrap around)
+ * see manual S3C2400
+ */
+ /* Stopp LCD-Controller */
+ lcd->lcdcon1 = 0x00000000;
+ /* frame buffer startadr */
+ lcd->lcdsaddr1 = gd->fb_base >> 1;
+ /* frame buffer endadr */
+ lcd->lcdsaddr2 = (gd->fb_base + FRAME_BUF_SIZE) >> 1;
+ lcd->lcdsaddr3 = ((256/4));
+ lcd->lcdcon2 = 0x000DC000;
+ if(gd->vfd_type == VFD_TYPE_MN11236)
+ lcd->lcdcon2 = 37 << 14; /* MN11236: 38 lines */
+ else
+ lcd->lcdcon2 = 55 << 14; /* T119C: 56 lines */
+ lcd->lcdcon3 = 0x0051000A;
+ lcd->lcdcon4 = 0x00000001;
+ if (gd->vfd_type && vfd_inv_data)
+ lcd->lcdcon5 = 0x000004C0;
+ else
+ lcd->lcdcon5 = 0x00000440;
+
+ /* Port pins as LCD output */
+ gpio->pccon = (gpio->pccon & 0xFFFFFF00) | 0x000000AA;
+ gpio->pdcon = (gpio->pdcon & 0xFFFFFF03) | 0x000000A8;
+
+ /* Synchronize VFD enable with LCD controller to avoid flicker */
+ lcd->lcdcon1 = 0x00000B75; /* Start LCD-Controller */
+ while ((lcd->lcdcon5 & 0x180000) != 0x100000) /* Wait for VSYNC end */
+ ;
+ while ((lcd->lcdcon5 & 0x060000) != 0x040000) /* Wait for next HSYNC */
+ ;
+ while ((lcd->lcdcon5 & 0x060000) == 0x040000)
+ ;
+ while ((lcd->lcdcon5 & 0x060000) != 0x000000)
+ ;
+ if(gd->vfd_type)
+ VFD_ENABLE;
+
+ debug("LCDSADDR1: %lX\n", lcd->lcdsaddr1);
+ debug("LCDSADDR2: %lX\n", lcd->lcdsaddr2);
+ debug("LCDSADDR3: %lX\n", lcd->lcdsaddr3);
+
+ return 0;
+}
+
+/*
+ * Disable VFD: should be run before resetting the system:
+ * disable VM, enable pull-up
+ */
+void disable_vfd (void)
+{
+ struct s3c24x0_gpio * const gpio = s3c24x0_get_base_gpio();
+
+ VFD_DISABLE;
+ gpio->pdcon &= ~0xC;
+ gpio->pdup &= ~0x2;
+}
+
+/************************************************************************/
+/* ** ROM capable initialization part - needed to reserve FB memory */
+/************************************************************************/
+
+/*
+ * This is called early in the system initialization to grab memory
+ * for the VFD controller.
+ *
+ * Note that this is running from ROM, so no write access to global data.
+ */
+ulong vfd_setmem (ulong addr)
+{
+ ulong size;
+
+ /* Round up to nearest full page */
+ size = (FRAME_BUF_SIZE + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
+
+ debug ("Reserving %ldk for VFD Framebuffer at: %08lx\n", size>>10, addr);
+
+ return (size);
+}
+
+/*
+ * Calculate fb size for VIDEOLFB_ATAG. Size returned contains fb,
+ * descriptors and palette areas.
+ */
+ulong calc_fbsize (void)
+{
+ return FRAME_BUF_SIZE;
+}
+
+#endif /* CONFIG_VFD */
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