Initial source

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diff --git a/chips/dc503.c b/chips/dc503.c
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	File: dc503.h
+ * 	Author: Alessandro Forin, Carnegie Mellon University
+ *	Date:	9/90
+ *
+ *	Routines for the DEC DC503 Programmable Cursor Chip
+ */
+#include <platforms.h>
+
+#include <chips/pm_defs.h>
+#include <chips/dc503.h>
+
+
+#if	defined(DECSTATION) || defined(VAXSTATION)
+
+typedef struct {
+	volatile unsigned short	pcc_cmdr;	/* all regs are wo */
+	short						pad0;
+	volatile unsigned short	pcc_xpos;
+	short						pad1;
+	volatile unsigned short	pcc_ypos;
+	short						pad2;
+	volatile unsigned short	pcc_xmin1;
+	short						pad3;
+	volatile unsigned short	pcc_xmax1;
+	short						pad4;
+	volatile unsigned short	pcc_ymin1;
+	short						pad5;
+	volatile unsigned short	pcc_ymax1;
+	short						pad6[9];
+	volatile unsigned short	pcc_xmin2;
+	short						pad7;
+	volatile unsigned short	pcc_xmax2;
+	short						pad8;
+	volatile unsigned short	pcc_ymin2;
+	short						pad9;
+	volatile unsigned short	pcc_ymax2;
+	short						pad10;
+	volatile unsigned short	pcc_memory;
+	short						pad11;
+} dc503_padded_regmap_t;
+
+#else
+
+typedef dc503_regmap_t	dc503_padded_regmap_t;
+
+#endif
+
+#ifdef	VAXSTATION
+#define X_CSHIFT 216
+#define Y_CSHIFT 34
+#define wbflush()
+#define PCC_STATE (DC503_CMD_ENPA | DC503_CMD_ENPB | DC503_CMD_HSHI)
+#endif	/*VAXSTATION*/
+
+/* defaults, for the innocents */
+
+#ifndef	X_CSHIFT
+#define X_CSHIFT 212
+#define Y_CSHIFT 34
+#define PCC_STATE (DC503_CMD_ENPA | DC503_CMD_ENPB)
+#endif
+
+/*
+ * Cursor
+ */
+dc503_pos_cursor( regs, x, y)
+	dc503_padded_regmap_t	*regs;
+{
+	regs->pcc_xpos = x + X_CSHIFT;
+	regs->pcc_ypos = y + Y_CSHIFT;
+	wbflush();
+}
+
+dc503_load_cursor( pm, cursor)
+	pm_softc_t	*pm;
+	unsigned short	*cursor;
+{
+	dc503_padded_regmap_t	*regs;
+	register int    i;
+
+	regs = (dc503_padded_regmap_t*)pm->cursor_registers;
+
+	pm->cursor_state |= DC503_CMD_LODSA;
+	regs->pcc_cmdr = pm->cursor_state;
+	wbflush();
+	for (i = 0; i < 32; i++) {
+		regs->pcc_memory = *cursor++;
+		wbflush();
+	}
+	pm->cursor_state &= ~DC503_CMD_LODSA;
+	regs->pcc_cmdr = pm->cursor_state;
+}
+
+
+unsigned short dc503_default_cursor[16+16] = {
+/* Plane A */
+	0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff,
+	0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff,
+/* Plane B */
+	0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff,
+	0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff, 0x00ff
+};
+
+/*
+ * Vert retrace interrupt
+ */
+dc503_vretrace( pm, on)
+	pm_softc_t	*pm;
+{
+	if (on)
+		pm->cursor_state |= DC503_CMD_ENRG2;
+	else
+		pm->cursor_state &= ~DC503_CMD_ENRG2;
+	((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state;
+}
+
+/*
+ * Video on/off
+ */
+dc503_video_on( pm, up)
+	pm_softc_t	*pm;
+{
+	pm->cursor_state = DC503_CMD_ENPA | (pm->cursor_state & ~DC503_CMD_FOPB);
+	((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state;
+}
+
+dc503_video_off( pm, up)
+	pm_softc_t	*pm;
+{
+	pm->cursor_state = DC503_CMD_FOPB | (pm->cursor_state & ~DC503_CMD_ENPA);
+	((dc503_padded_regmap_t*)pm->cursor_registers)->pcc_cmdr = pm->cursor_state;
+}
+
+
+/*
+ * Initialization
+ */
+dc503_init( pm )
+	pm_softc_t	*pm;
+{
+	dc503_padded_regmap_t	*regs;
+
+	regs = (dc503_padded_regmap_t*)pm->cursor_registers;
+
+	dc503_load_cursor( pm, dc503_default_cursor);
+	dc503_pos_cursor( regs, 0, 0);	/* XXX off screen */
+
+	regs->pcc_xmin1 = 0;	/* test only */
+	regs->pcc_xmax1 = 0;
+	regs->pcc_ymin1 = 0;
+	regs->pcc_ymax1 = 0;
+
+	regs->pcc_xmin2 = 212;	/* vert retrace detector */
+	regs->pcc_xmax2 = 212+1023;
+	regs->pcc_ymin2 = 34+863;
+	regs->pcc_ymax2 = 34+863;
+
+#if 0
+	regs->pcc_cmdr = DC503_CMD_FOPB | DC503_CMD_VBHI;/* reset */
+#endif
+	pm->cursor_state = PCC_STATE;
+	regs->pcc_cmdr = pm->cursor_state;
+}