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-rw-r--r--drv_T6963.c576
1 files changed, 576 insertions, 0 deletions
diff --git a/drv_T6963.c b/drv_T6963.c
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--- /dev/null
+++ b/drv_T6963.c
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+/* $Id: drv_T6963.c 1136 2010-11-28 16:07:16Z mzuther $
+ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/drv_T6963.c $
+ *
+ * new style driver for T6963-based displays
+ *
+ * Copyright (C) 2003 Michael Reinelt <michael@reinelt.co.at>
+ * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * This file is part of LCD4Linux.
+ *
+ * LCD4Linux 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, or (at your option)
+ * any later version.
+ *
+ * LCD4Linux 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/*
+ *
+ * exported fuctions:
+ *
+ * struct DRIVER drv_T6963
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <termios.h>
+#include <fcntl.h>
+#include <sys/time.h>
+
+#include "debug.h"
+#include "cfg.h"
+#include "qprintf.h"
+#include "udelay.h"
+#include "plugin.h"
+#include "drv.h"
+#include "drv_generic_graphic.h"
+#include "drv_generic_parport.h"
+
+#ifdef WITH_DMALLOC
+#include <dmalloc.h>
+#endif
+
+static char Name[] = "T6963";
+static int Model;
+
+typedef struct {
+ int type;
+ char *name;
+} MODEL;
+
+static MODEL Models[] = {
+ {0x01, "T6963"},
+ {0xff, "Unknown"}
+};
+
+
+/* font width of display */
+static int CELL;
+
+/* text rows/columns */
+static int TROWS, TCOLS;
+
+/* SingleScan or DualScan */
+static int DualScan = 0;
+
+/* Timings */
+static int T_ACC, T_OH, T_PW, T_DH, T_CDS;
+
+/* soft-wiring */
+static unsigned char SIGNAL_CE;
+static unsigned char SIGNAL_CD;
+static unsigned char SIGNAL_RD;
+static unsigned char SIGNAL_WR;
+
+unsigned char *Buffer1, *Buffer2;
+
+static int bug = 0;
+
+
+/****************************************/
+/*** hardware dependant functions ***/
+/****************************************/
+
+/* perform normal status check */
+static void drv_T6_status1(void)
+{
+ int n;
+
+ /* turn off data line drivers */
+ drv_generic_parport_direction(1);
+
+ /* lower CE and RD */
+ drv_generic_parport_control(SIGNAL_CE | SIGNAL_RD, 0);
+
+ /* Access Time */
+ ndelay(T_ACC);
+
+ /* wait for STA0=1 and STA1=1 */
+ n = 0;
+ do {
+ rep_nop();
+ if (++n > 1000) {
+ debug("hang in status1");
+ bug = 1;
+ break;
+ }
+ } while ((drv_generic_parport_read() & 0x03) != 0x03);
+
+ /* rise RD and CE */
+ drv_generic_parport_control(SIGNAL_RD | SIGNAL_CE, SIGNAL_RD | SIGNAL_CE);
+
+ /* Output Hold Time */
+ ndelay(T_OH);
+
+ /* turn on data line drivers */
+ drv_generic_parport_direction(0);
+}
+
+
+/* perform status check in "auto mode" */
+static void drv_T6_status2(void)
+{
+ int n;
+
+ /* turn off data line drivers */
+ drv_generic_parport_direction(1);
+
+ /* lower RD and CE */
+ drv_generic_parport_control(SIGNAL_RD | SIGNAL_CE, 0);
+
+ /* Access Time */
+ ndelay(T_ACC);
+
+ /* wait for STA3=1 */
+ n = 0;
+ do {
+ rep_nop();
+ if (++n > 1000) {
+ debug("hang in status2");
+ bug = 1;
+ break;
+ }
+ } while ((drv_generic_parport_read() & 0x08) != 0x08);
+
+ /* rise RD and CE */
+ drv_generic_parport_control(SIGNAL_RD | SIGNAL_CE, SIGNAL_RD | SIGNAL_CE);
+
+ /* Output Hold Time */
+ ndelay(T_OH);
+
+ /* turn on data line drivers */
+ drv_generic_parport_direction(0);
+}
+
+
+static void drv_T6_write_cmd(const unsigned char cmd)
+{
+ /* wait until the T6963 is idle */
+ drv_T6_status1();
+
+ /* put data on DB1..DB8 */
+ drv_generic_parport_data(cmd);
+
+ /* lower WR and CE */
+ drv_generic_parport_control(SIGNAL_WR | SIGNAL_CE, 0);
+
+ /* Pulse width */
+ ndelay(T_PW);
+
+ /* rise WR and CE */
+ drv_generic_parport_control(SIGNAL_WR | SIGNAL_CE, SIGNAL_WR | SIGNAL_CE);
+
+ /* Data Hold Time */
+ ndelay(T_DH);
+}
+
+
+static void drv_T6_write_data(const unsigned char data)
+{
+ /* wait until the T6963 is idle */
+ drv_T6_status1();
+
+ /* put data on DB1..DB8 */
+ drv_generic_parport_data(data);
+
+ /* lower C/D */
+ drv_generic_parport_control(SIGNAL_CD, 0);
+
+ /* C/D Setup Time */
+ ndelay(T_CDS);
+
+ /* lower WR and CE */
+ drv_generic_parport_control(SIGNAL_WR | SIGNAL_CE, 0);
+
+ /* Pulse Width */
+ ndelay(T_PW);
+
+ /* rise WR and CE */
+ drv_generic_parport_control(SIGNAL_WR | SIGNAL_CE, SIGNAL_WR | SIGNAL_CE);
+
+ /* Data Hold Time */
+ ndelay(T_DH);
+
+ /* rise CD */
+ drv_generic_parport_control(SIGNAL_CD, SIGNAL_CD);
+}
+
+
+static void drv_T6_write_auto(const unsigned char data)
+{
+ /* wait until the T6963 is idle */
+ drv_T6_status2();
+
+ /* put data on DB1..DB8 */
+ drv_generic_parport_data(data);
+
+ /* lower C/D */
+ drv_generic_parport_control(SIGNAL_CD, 0);
+
+ /* C/D Setup Time */
+ ndelay(T_CDS);
+
+ /* lower WR and CE */
+ drv_generic_parport_control(SIGNAL_WR | SIGNAL_CE, 0);
+
+ /* Pulse Width */
+ ndelay(T_PW);
+
+ /* rise WR and CE */
+ drv_generic_parport_control(SIGNAL_WR | SIGNAL_CE, SIGNAL_WR | SIGNAL_CE);
+
+ /* Data Hold Time */
+ ndelay(T_DH);
+
+ /* rise CD */
+ drv_generic_parport_control(SIGNAL_CD, SIGNAL_CD);
+}
+
+
+#if 0 /* not used */
+static void drv_T6_send_byte(const unsigned char cmd, const unsigned char data)
+{
+ drv_T6_write_data(data);
+ drv_T6_write_cmd(cmd);
+}
+#endif
+
+static void drv_T6_send_word(const unsigned char cmd, const unsigned short data)
+{
+ drv_T6_write_data(data & 0xff);
+ drv_T6_write_data(data >> 8);
+ drv_T6_write_cmd(cmd);
+}
+
+
+static void drv_T6_clear(const unsigned short addr, const int len)
+{
+ int i;
+
+ drv_T6_send_word(0x24, addr); /* Set Adress Pointer */
+ drv_T6_write_cmd(0xb0); /* Set Data Auto Write */
+ for (i = 0; i < len; i++) {
+ drv_T6_write_auto(0x0);
+ if (bug) {
+ bug = 0;
+ debug("bug occurred at byte %d of %d", i, len);
+ }
+ }
+ drv_T6_status2();
+ drv_T6_write_cmd(0xb2); /* Auto Reset */
+}
+
+
+static void drv_T6_copy(const unsigned short addr, const unsigned char *data, const int len)
+{
+ int i;
+
+ drv_T6_send_word(0x24, addr); /* Set Adress Pointer */
+ drv_T6_write_cmd(0xb0); /* Set Data Auto Write */
+ for (i = 0; i < len; i++) {
+ drv_T6_write_auto(*(data++));
+ if (bug) {
+ bug = 0;
+ debug("bug occurred at byte %d of %d, addr=%d", i, len, addr);
+ }
+ }
+ drv_T6_status2();
+ drv_T6_write_cmd(0xb2); /* Auto Reset */
+}
+
+
+static void drv_T6_blit(const int row, const int col, const int height, const int width)
+{
+ int r, c, a, b;
+ int i, j, e, n;
+ int base;
+
+ for (r = row; r < row + height; r++) {
+ for (c = col; c < col + width; c++) {
+ unsigned char mask = 1 << (CELL - 1 - c % CELL);
+ if (drv_generic_graphic_black(r, c)) {
+ /* set bit */
+ Buffer1[(r * DCOLS + c) / CELL] |= mask;
+ } else {
+ /* clear bit */
+ Buffer1[(r * DCOLS + c) / CELL] &= ~mask;
+ }
+ }
+ a = (r * DCOLS + col) / CELL;
+ b = (r * DCOLS + col + width + CELL - 1) / CELL;
+ for (i = a; i <= b; i++) {
+ if (Buffer1[i] == Buffer2[i])
+ continue;
+ for (j = i, e = 0; i <= b; i++) {
+ if (Buffer1[i] == Buffer2[i]) {
+ if (++e > 4)
+ break;
+ } else {
+ e = 0;
+ }
+ }
+ if (DualScan && r >= DROWS / 2) {
+ base = 0x8200 - DCOLS * DROWS / 2 / CELL;
+ } else {
+ base = 0x0200;
+ }
+ n = i - j - e + 1;
+ memcpy(Buffer2 + j, Buffer1 + j, n);
+ drv_T6_copy(base + j, Buffer1 + j, n);
+ }
+ }
+}
+
+
+static int drv_T6_start(const char *section)
+{
+ char *model, *s;
+
+ model = cfg_get(section, "Model", "generic");
+ if (model != NULL && *model != '\0') {
+ int i;
+ for (i = 0; Models[i].type != 0xff; i++) {
+ if (strcasecmp(Models[i].name, model) == 0)
+ break;
+ }
+ if (Models[i].type == 0xff) {
+ error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source());
+ return -1;
+ }
+ Model = i;
+ } else {
+ error("%s: empty '%s.Model' entry from %s", Name, section, cfg_source());
+ return -1;
+ }
+
+ /* read display size from config */
+ s = cfg_get(section, "Size", NULL);
+ if (s == NULL || *s == '\0') {
+ error("%s: no '%s.Size' entry from %s", Name, section, cfg_source());
+ return -1;
+ }
+
+ DROWS = -1;
+ DCOLS = -1;
+ if (sscanf(s, "%dx%d", &DCOLS, &DROWS) != 2 || DCOLS < 1 || DROWS < 1) {
+ error("%s: bad Size '%s' from %s", Name, s, cfg_source());
+ return -1;
+ }
+
+ if (sscanf(s = cfg_get(section, "font", "6x8"), "%dx%d", &XRES, &YRES) != 2 || XRES < 1 || YRES < 1) {
+ error("%s: bad %s.Font '%s' from %s", Name, section, s, cfg_source());
+ free(s);
+ return -1;
+ }
+ free(s);
+
+
+ /* get font width of display */
+ cfg_number(section, "Cell", 6, 5, 8, &CELL);
+
+ TROWS = DROWS / 8; /* text rows */
+ TCOLS = DCOLS / CELL; /* text columns */
+
+ /* get DualScan mode */
+ cfg_number(section, "DualScan", 0, 0, 1, &DualScan);
+
+ info("%s: %dx%d %sScan %d bits/cell", Name, DCOLS, DROWS, DualScan ? "Dual" : "Single", CELL);
+
+ Buffer1 = malloc(TCOLS * DROWS);
+ if (Buffer1 == NULL) {
+ error("%s: framebuffer #1 could not be allocated: malloc() failed", Name);
+ return -1;
+ }
+
+ Buffer2 = malloc(TCOLS * DROWS);
+ if (Buffer2 == NULL) {
+ error("%s: framebuffer #2 could not be allocated: malloc() failed", Name);
+ return -1;
+ }
+
+ memset(Buffer1, 0, TCOLS * DROWS * sizeof(*Buffer1));
+ memset(Buffer2, 0, TCOLS * DROWS * sizeof(*Buffer2));
+
+ if (drv_generic_parport_open(section, Name) != 0) {
+ error("%s: could not initialize parallel port!", Name);
+ return -1;
+ }
+
+ /* soft-wiring */
+ if ((SIGNAL_CE = drv_generic_parport_wire_ctrl("CE", "STROBE")) == 0xff)
+ return -1;
+ if ((SIGNAL_CD = drv_generic_parport_wire_ctrl("CD", "SLCTIN")) == 0xff)
+ return -1;
+ if ((SIGNAL_RD = drv_generic_parport_wire_ctrl("RD", "AUTOFD")) == 0xff)
+ return -1;
+ if ((SIGNAL_WR = drv_generic_parport_wire_ctrl("WR", "INIT")) == 0xff)
+ return -1;
+
+ /* timings */
+ T_ACC = timing(Name, section, "ACC", 150, "ns"); /* Access Time */
+ T_OH = timing(Name, section, "OH", 50, "ns"); /* Output Hold Time */
+ T_PW = timing(Name, section, "PW", 80, "ns"); /* CE, RD, WR Pulse Width */
+ T_DH = timing(Name, section, "DH", 40, "ns"); /* Data Hold Time */
+ T_CDS = timing(Name, section, "CDS", 100, "ns"); /* C/D Setup Time */
+
+
+ /* rise CE, CD, RD and WR */
+ drv_generic_parport_control(SIGNAL_CE | SIGNAL_CD | SIGNAL_RD | SIGNAL_WR,
+ SIGNAL_CE | SIGNAL_CD | SIGNAL_RD | SIGNAL_WR);
+ /* set direction: write */
+ drv_generic_parport_direction(0);
+
+
+ /* initialize display */
+
+ drv_T6_send_word(0x40, 0x0000); /* Set Text Home Address */
+ drv_T6_send_word(0x41, TCOLS); /* Set Text Area */
+
+ drv_T6_send_word(0x42, 0x0200); /* Set Graphic Home Address */
+ drv_T6_send_word(0x43, TCOLS); /* Set Graphic Area */
+
+ drv_T6_write_cmd(0x80); /* Mode Set: OR mode, Internal CG RAM mode */
+ drv_T6_send_word(0x22, 0x0002); /* Set Offset Register */
+ drv_T6_write_cmd(0x98); /* Set Display Mode: Curser off, Text off, Graphics on */
+ drv_T6_write_cmd(0xa0); /* Set Cursor Pattern: 1 line cursor */
+ drv_T6_send_word(0x21, 0x0000); /* Set Cursor Pointer to (0,0) */
+
+
+ /* clear display */
+
+ if (DualScan) {
+ /* upper half */
+ drv_T6_clear(0x0000, TCOLS * TROWS / 2); /* clear text area */
+ drv_T6_clear(0x0200, TCOLS * TROWS * 8 / 2); /* clear graphic area */
+ /* lower half */
+ drv_T6_clear(0x8000, TCOLS * TROWS / 2); /* clear text area */
+ drv_T6_clear(0x8200, TCOLS * TROWS * 8 / 2); /* clear graphic area */
+ } else {
+ drv_T6_clear(0x0000, TCOLS * TROWS); /* clear text area */
+ drv_T6_clear(0x0200, TCOLS * TROWS * 8); /* clear graphic area */
+ }
+
+ return 0;
+}
+
+
+/****************************************/
+/*** plugins ***/
+/****************************************/
+
+/* none at the moment... */
+
+
+/****************************************/
+/*** exported functions ***/
+/****************************************/
+
+
+/* list models */
+int drv_T6_list(void)
+{
+ int i;
+
+ for (i = 0; Models[i].type != 0xff; i++) {
+ printf("%s ", Models[i].name);
+ }
+ return 0;
+}
+
+
+/* initialize driver & display */
+int drv_T6_init(const char *section, const int quiet)
+{
+ int ret;
+
+ info("%s: %s", Name, "$Rev: 1136 $");
+
+ /* real worker functions */
+ drv_generic_graphic_real_blit = drv_T6_blit;
+
+ /* start display */
+ if ((ret = drv_T6_start(section)) != 0)
+ return ret;
+
+ /* initialize generic graphic driver */
+ if ((ret = drv_generic_graphic_init(section, Name)) != 0)
+ return ret;
+
+ if (!quiet) {
+ char buffer[40];
+ qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
+ if (drv_generic_graphic_greet(buffer, NULL)) {
+ sleep(3);
+ drv_generic_graphic_clear();
+ }
+ }
+
+ /* register plugins */
+ /* none at the moment... */
+
+
+ return 0;
+}
+
+
+/* close driver & display */
+int drv_T6_quit(const int quiet)
+{
+
+ info("%s: shutting down.", Name);
+
+ drv_generic_graphic_clear();
+
+ if (!quiet) {
+ drv_generic_graphic_greet("goodbye!", NULL);
+ }
+
+ drv_generic_graphic_quit();
+ drv_generic_parport_close();
+
+ if (Buffer1) {
+ free(Buffer1);
+ Buffer1 = NULL;
+ }
+
+ if (Buffer2) {
+ free(Buffer2);
+ Buffer2 = NULL;
+ }
+
+ return (0);
+}
+
+
+DRIVER drv_T6963 = {
+ .name = Name,
+ .list = drv_T6_list,
+ .init = drv_T6_init,
+ .quit = drv_T6_quit,
+};
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