Initial revision

2 files changed, 315 insertions, 0 deletions

diff --git a/board/cogent/lcd.c b/board/cogent/lcd.c
new file mode 100644
index 0000000..941ea65
--- /dev/null
+++ b/board/cogent/lcd.c
@@ -0,0 +1,231 @@
+/* most of this is taken from the file */
+/* hal/powerpc/cogent/current/src/hal_diag.c in the */
+/* Cygnus eCos source. Here is the copyright notice: */
+/* */
+/*============================================================================= */
+/* */
+/*      hal_diag.c */
+/* */
+/*      HAL diagnostic output code */
+/* */
+/*============================================================================= */
+/*####COPYRIGHTBEGIN#### */
+/* */
+/* ------------------------------------------- */
+/* The contents of this file are subject to the Cygnus eCos Public License */
+/* Version 1.0 (the "License"); you may not use this file except in */
+/* compliance with the License.  You may obtain a copy of the License at */
+/* http://sourceware.cygnus.com/ecos */
+/* */
+/* Software distributed under the License is distributed on an "AS IS" */
+/* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the */
+/* License for the specific language governing rights and limitations under */
+/* the License. */
+/* */
+/* The Original Code is eCos - Embedded Cygnus Operating System, released */
+/* September 30, 1998. */
+/* */
+/* The Initial Developer of the Original Code is Cygnus.  Portions created */
+/* by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions.  All Rights Reserved. */
+/* ------------------------------------------- */
+/* */
+/*####COPYRIGHTEND#### */
+/*============================================================================= */
+/*#####DESCRIPTIONBEGIN#### */
+/* */
+/* Author(s):    nickg, jskov */
+/* Contributors: nickg, jskov */
+/* Date:         1999-03-23 */
+/* Purpose:      HAL diagnostic output */
+/* Description:  Implementations of HAL diagnostic output support. */
+/* */
+/*####DESCRIPTIONEND#### */
+/* */
+/*============================================================================= */
+
+/*----------------------------------------------------------------------------- */
+/* Cogent board specific LCD code */
+
+#include <common.h>
+#include <stdarg.h>
+#include <board/cogent/lcd.h>
+
+static char lines[2][LCD_LINE_LENGTH+1];
+static int curline;
+static int linepos;
+static int heartbeat_active;
+/* make the next two strings exactly LCD_LINE_LENGTH (16) chars long */
+/* pad to the right with spaces if necessary */
+static char init_line0[LCD_LINE_LENGTH+1] = "U-Boot Cogent  ";
+static char init_line1[LCD_LINE_LENGTH+1] = "mjj, 11 Aug 2000";
+
+static inline unsigned char
+lcd_read_status(cma_mb_lcd *clp)
+{
+    /* read the Busy Status Register */
+    return (cma_mb_reg_read(&clp->lcd_bsr));
+}
+
+static inline void
+lcd_wait_not_busy(cma_mb_lcd *clp)
+{
+    /*
+     * wait for not busy
+     * Note: It seems that the LCD isn't quite ready to process commands
+     * when it clears the BUSY flag. Reading the status address an extra
+     * time seems to give it enough breathing room.
+     */
+
+    while (lcd_read_status(clp) & LCD_STAT_BUSY)
+	;
+
+    (void)lcd_read_status(clp);
+}
+
+static inline void
+lcd_write_command(cma_mb_lcd *clp, unsigned char cmd)
+{
+    lcd_wait_not_busy(clp);
+
+    /* write the Command Register */
+    cma_mb_reg_write(&clp->lcd_cmd, cmd);
+}
+
+static inline void
+lcd_write_data(cma_mb_lcd *clp, unsigned char data)
+{
+    lcd_wait_not_busy(clp);
+
+    /* write the Current Character Register */
+    cma_mb_reg_write(&clp->lcd_ccr, data);
+}
+
+static inline void
+lcd_dis(int addr, char *string)
+{
+    cma_mb_lcd *clp = (cma_mb_lcd *)CMA_MB_LCD_BASE;
+    int pos, linelen;
+
+    linelen = LCD_LINE_LENGTH;
+    if (heartbeat_active && addr == LCD_LINE0)
+	linelen--;
+
+    lcd_write_command(clp, LCD_CMD_ADD + addr);
+    for (pos = 0; *string != '\0' && pos < linelen; pos++)
+        lcd_write_data(clp, *string++);
+}
+
+void
+lcd_init(void)
+{
+    cma_mb_lcd *clp = (cma_mb_lcd *)CMA_MB_LCD_BASE;
+    int i;
+
+    /* configure the lcd for 8 bits/char, 2 lines and 5x7 dot matrix */
+    lcd_write_command(clp, LCD_CMD_MODE);
+
+    /* turn the LCD display on */
+    lcd_write_command(clp, LCD_CMD_DON);
+
+    curline = 0;
+    linepos = 0;
+
+    for (i = 0; i < LCD_LINE_LENGTH; i++) {
+        lines[0][i] = init_line0[i];
+	lines[1][i] = init_line1[i];
+    }
+
+    lines[0][LCD_LINE_LENGTH] = lines[1][LCD_LINE_LENGTH] = 0;
+
+    lcd_dis(LCD_LINE0, lines[0]);
+    lcd_dis(LCD_LINE1, lines[1]);
+
+    printf("HD44780 2 line x %d char display\n", LCD_LINE_LENGTH);
+}
+
+void
+lcd_write_char(const char c)
+{
+    int i, linelen;
+
+    /* ignore CR */
+    if (c == '\r')
+	return;
+
+    linelen = LCD_LINE_LENGTH;
+    if (heartbeat_active && curline == 0)
+	linelen--;
+
+    if (c == '\n') {
+        lcd_dis(LCD_LINE0, &lines[curline^1][0]);
+        lcd_dis(LCD_LINE1, &lines[curline][0]);
+
+        /* Do a line feed */
+        curline ^= 1;
+	linelen = LCD_LINE_LENGTH;
+	if (heartbeat_active && curline == 0)
+	    linelen--;
+        linepos = 0;
+
+        for (i = 0; i < linelen; i++)
+            lines[curline][i] = ' ';
+
+        return;
+    }
+
+    /* Only allow to be output if there is room on the LCD line */
+    if (linepos < linelen)
+        lines[curline][linepos++] = c;
+}
+
+void
+lcd_flush(void)
+{
+    lcd_dis(LCD_LINE1, &lines[curline][0]);
+}
+
+void
+lcd_write_string(const char *s)
+{
+    char *p;
+
+    for (p = (char *)s; *p != '\0'; p++)
+	lcd_write_char(*p);
+}
+
+void
+lcd_printf(const char *fmt, ...)
+{
+    va_list args;
+    char buf[CFG_PBSIZE];
+
+    va_start(args, fmt);
+    (void)vsprintf(buf, fmt, args);
+    va_end(args);
+
+    lcd_write_string(buf);
+}
+
+void
+lcd_heartbeat(void)
+{
+    cma_mb_lcd *clp = (cma_mb_lcd *)CMA_MB_LCD_BASE;
+#if 0
+    static char rotchars[] = { '|', '/', '-', '\\' };
+#else
+    /* HD44780 Rom Code A00 has no backslash */
+    static char rotchars[] = { '|', '/', '-', '\315' };
+#endif
+    static int rotator_index = 0;
+
+    heartbeat_active = 1;
+
+    /* write the address */
+    lcd_write_command(clp, LCD_CMD_ADD + LCD_LINE0 + (LCD_LINE_LENGTH - 1));
+
+    /* write the next char in the sequence */
+    lcd_write_data(clp, rotchars[rotator_index]);
+
+    if (++rotator_index >= (sizeof rotchars / sizeof rotchars[0]))
+	rotator_index = 0;
+}
diff --git a/board/cogent/lcd.h b/board/cogent/lcd.h
new file mode 100644
index 0000000..1056eea
--- /dev/null
+++ b/board/cogent/lcd.h
@@ -0,0 +1,84 @@
+/* most of this is taken from the file */
+/* hal/powerpc/cogent/current/src/hal_diag.c in the */
+/* Cygnus eCos source. Here is the copyright notice: */
+/* */
+/*============================================================================= */
+/* */
+/*      hal_diag.c */
+/* */
+/*      HAL diagnostic output code */
+/* */
+/*============================================================================= */
+/*####COPYRIGHTBEGIN#### */
+/* */
+/* ------------------------------------------- */
+/* The contents of this file are subject to the Cygnus eCos Public License */
+/* Version 1.0 (the "License"); you may not use this file except in */
+/* compliance with the License.  You may obtain a copy of the License at */
+/* http://sourceware.cygnus.com/ecos */
+/* */
+/* Software distributed under the License is distributed on an "AS IS" */
+/* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the */
+/* License for the specific language governing rights and limitations under */
+/* the License. */
+/* */
+/* The Original Code is eCos - Embedded Cygnus Operating System, released */
+/* September 30, 1998. */
+/* */
+/* The Initial Developer of the Original Code is Cygnus.  Portions created */
+/* by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions.  All Rights Reserved. */
+/* ------------------------------------------- */
+/* */
+/*####COPYRIGHTEND#### */
+/*============================================================================= */
+/*#####DESCRIPTIONBEGIN#### */
+/* */
+/* Author(s):    nickg, jskov */
+/* Contributors: nickg, jskov */
+/* Date:         1999-03-23 */
+/* Purpose:      HAL diagnostic output */
+/* Description:  Implementations of HAL diagnostic output support. */
+/* */
+/*####DESCRIPTIONEND#### */
+/* */
+/*============================================================================= */
+
+/* FEMA 162B 16 character x 2 line LCD */
+
+/* status register bit definitions */
+#define LCD_STAT_BUSY	0x80	/* 1 = display busy */
+#define LCD_STAT_ADD	0x7F	/* bits 0-6 return current display address */
+
+/* command register definitions */
+#define LCD_CMD_RST	0x01	/* clear entire display and reset display addr */
+#define LCD_CMD_HOME	0x02	/* reset display address and reset any shifting */
+#define LCD_CMD_ECL	0x04	/* move cursor left one pos on next data write */
+#define LCD_CMD_ESL	0x05	/* shift display left one pos on next data write */
+#define LCD_CMD_ECR	0x06	/* move cursor right one pos on next data write */
+#define LCD_CMD_ESR	0x07	/* shift disp right one pos on next data write */
+#define LCD_CMD_DOFF	0x08	/* display off, cursor off, blinking off */
+#define LCD_CMD_BL	0x09	/* blink character at current cursor position */
+#define LCD_CMD_CUR	0x0A	/* enable cursor on */
+#define LCD_CMD_DON	0x0C	/* turn display on */
+#define LCD_CMD_CL	0x10	/* move cursor left one position */
+#define LCD_CMD_SL	0x14	/* shift display left one position */
+#define LCD_CMD_CR	0x18	/* move cursor right one position */
+#define LCD_CMD_SR	0x1C	/* shift display right one position */
+#define LCD_CMD_MODE	0x38	/* sets 8 bits, 2 lines, 5x7 characters */
+#define LCD_CMD_ACG	0x40	/* bits 0-5 sets character generator address */
+#define LCD_CMD_ADD	0x80	/* bits 0-6 sets display data addr to line 1 + */
+
+/* LCD status values */
+#define LCD_OK		0x00
+#define LCD_ERR 	0x01
+
+#define LCD_LINE0	0x00
+#define LCD_LINE1	0x40
+
+#define LCD_LINE_LENGTH	16
+
+extern void lcd_init(void);
+extern void lcd_write_char(const char);
+extern void lcd_flush(void);
+extern void lcd_write_string(const char *);
+extern void lcd_printf(const char *, ...);