patch-2.1.112 linux/drivers/video/bwtwofb.c

• Lines: 223
• Date: Sun Jul 26 14:40:19 1998
• Orig file: v2.1.111/linux/drivers/video/bwtwofb.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.111/linux/drivers/video/bwtwofb.c linux/drivers/video/bwtwofb.c
@@ -0,0 +1,222 @@
+/* $Id: bwtwofb.c,v 1.1 1998/07/21 14:50:48 jj Exp $
+ * bwtwofb.c: BWtwo frame buffer driver
+ *
+ * Copyright (C) 1998 Jakub Jelinek   (jj@ultra.linux.cz)
+ * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
+ * Copyright (C) 1997 Eddie C. Dost   (ecd@skynet.be)
+ * Copyright (C) 1998 Pavel Machek    (pavel@ucw.cz)
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/malloc.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/selection.h>
+
+#include "sbusfb.h"
+#include <asm/io.h>
+#ifndef __sparc_v9__
+#include <asm/sun4paddr.h>
+#endif
+
+#include "fbcon-mfb.h"
+
+/* OBio addresses for the bwtwo registers */
+#define BWTWO_REGISTER_OFFSET 0x400000
+
+struct bw2_regs {
+	struct bt_regs		bt;
+	volatile u8		control;
+	volatile u8		status;
+	volatile u8		cursor_start;
+	volatile u8		cursor_end;
+	volatile u8		h_blank_start;
+	volatile u8		h_blank_end;
+	volatile u8		h_sync_start;
+	volatile u8		h_sync_end;
+	volatile u8		comp_sync_end;
+	volatile u8		v_blank_start_high;
+	volatile u8		v_blank_start_low;
+	volatile u8		v_blank_end;
+	volatile u8		v_sync_start;
+	volatile u8		v_sync_end;
+	volatile u8		xfer_holdoff_start;
+	volatile u8		xfer_holdoff_end;
+};
+
+/* Status Register Constants */
+#define BWTWO_SR_RES_MASK	0x70
+#define BWTWO_SR_1600_1280	0x50
+#define BWTWO_SR_1152_900_76_A	0x40
+#define BWTWO_SR_1152_900_76_B	0x60
+#define BWTWO_SR_ID_MASK	0x0f
+#define BWTWO_SR_ID_MONO	0x02
+#define BWTWO_SR_ID_MONO_ECL	0x03
+#define BWTWO_SR_ID_MSYNC	0x04
+
+/* Control Register Constants */
+#define BWTWO_CTL_ENABLE_INTS   0x80
+#define BWTWO_CTL_ENABLE_VIDEO  0x40
+#define BWTWO_CTL_ENABLE_TIMING 0x20
+#define BWTWO_CTL_ENABLE_CURCMP 0x10
+#define BWTWO_CTL_XTAL_MASK     0x0C
+#define BWTWO_CTL_DIVISOR_MASK  0x03
+
+/* Status Register Constants */
+#define BWTWO_STAT_PENDING_INT  0x80
+#define BWTWO_STAT_MSENSE_MASK  0x70
+#define BWTWO_STAT_ID_MASK      0x0f
+
+static struct sbus_mmap_map bw2_mmap_map[] = {
+	{ 0,			0,			SBUS_MMAP_FBSIZE(1) },
+	{ 0,			0,			0		    }
+};
+
+static void bw2_blank (struct fb_info_sbusfb *fb)
+{
+	fb->s.bw2.regs->control &= ~BWTWO_CTL_ENABLE_VIDEO;
+}
+
+static void bw2_unblank (struct fb_info_sbusfb *fb)
+{
+	fb->s.bw2.regs->control |= BWTWO_CTL_ENABLE_VIDEO;
+}
+
+static void bw2_margins (struct fb_info_sbusfb *fb, struct display *p, int x_margin, int y_margin)
+{
+	p->screen_base += ((y_margin - fb->y_margin) * p->line_length + (x_margin - fb->x_margin)) >> 3;
+}
+
+static u8 bw2regs_1600[] __initdata = {
+	0x14, 0x8b,	0x15, 0x28,	0x16, 0x03,	0x17, 0x13,
+	0x18, 0x7b,	0x19, 0x05,	0x1a, 0x34,	0x1b, 0x2e,
+	0x1c, 0x00,	0x1d, 0x0a,	0x1e, 0xff,	0x1f, 0x01,
+	0x10, 0x21,	0
+};
+
+static u8 bw2regs_ecl[] __initdata = {
+	0x14, 0x65,	0x15, 0x1e,	0x16, 0x04,	0x17, 0x0c,
+	0x18, 0x5e,	0x19, 0x03,	0x1a, 0xa7,	0x1b, 0x23,
+	0x1c, 0x00,	0x1d, 0x08,	0x1e, 0xff,	0x1f, 0x01,
+	0x10, 0x20,	0
+};
+
+static u8 bw2regs_analog[] __initdata = {
+	0x14, 0xbb,	0x15, 0x2b,	0x16, 0x03,	0x17, 0x13,
+	0x18, 0xb0,	0x19, 0x03,	0x1a, 0xa6,	0x1b, 0x22,
+	0x1c, 0x01,	0x1d, 0x05,	0x1e, 0xff,	0x1f, 0x01,
+	0x10, 0x20,	0
+};
+
+static u8 bw2regs_76hz[] __initdata = {
+	0x14, 0xb7,	0x15, 0x27,	0x16, 0x03,	0x17, 0x0f,
+	0x18, 0xae,	0x19, 0x03,	0x1a, 0xae,	0x1b, 0x2a,
+	0x1c, 0x01,	0x1d, 0x09,	0x1e, 0xff,	0x1f, 0x01,
+	0x10, 0x24,	0
+};
+
+static u8 bw2regs_66hz[] __initdata = {
+	0x14, 0xbb,	0x15, 0x2b,	0x16, 0x04,	0x17, 0x14,
+	0x18, 0xae,	0x19, 0x03,	0x1a, 0xa8,	0x1b, 0x24,
+	0x1c, 0x01,	0x1d, 0x05,	0x1e, 0xff,	0x1f, 0x01,
+	0x10, 0x20,	0
+};
+
+static char idstring[60] __initdata = { 0 };
+
+__initfunc(char *bwtwofb_init(struct fb_info_sbusfb *fb))
+{
+	struct fb_fix_screeninfo *fix = &fb->fix;
+	struct display *disp = &fb->disp;
+	struct fbtype *type = &fb->type;
+#ifdef CONFIG_SUN4
+	unsigned long phys = SUN4_300_BWTWO_PHYSADDR;
+#else
+	unsigned long phys = fb->sbdp->reg_addrs[0].phys_addr;
+#endif
+
+#ifndef FBCON_HAS_MFB
+	return NULL;
+#endif
+
+	if (!fb->s.bw2.regs) {
+		fb->s.bw2.regs = (struct bw2_regs *)sparc_alloc_io(phys+BWTWO_REGISTER_OFFSET, 0, 
+				sizeof(struct bw2_regs), "bw2_regs", fb->iospace, 0);
+		if (!prom_getbool(fb->prom_node, "width")) {
+			/* Ugh, broken PROM didn't initialize us.
+			 * Let's deal with this ourselves.
+			 */
+			u8 status, mon;
+			u8 *p;
+			int sizechange = 0;
+
+			status = fb->s.bw2.regs->status;
+			mon = status & BWTWO_SR_RES_MASK;
+			switch (status & BWTWO_SR_ID_MASK) {
+				case BWTWO_SR_ID_MONO_ECL:
+					if (mon == BWTWO_SR_1600_1280) {
+						p = bw2regs_1600;
+						fb->type.fb_width = 1600;
+						fb->type.fb_height = 1280;
+						sizechange = 1;
+					} else
+						p = bw2regs_ecl;
+					break;
+				case BWTWO_SR_ID_MONO:
+					p = bw2regs_analog;
+					break;
+				case BWTWO_SR_ID_MSYNC:
+					if (mon == BWTWO_SR_1152_900_76_A ||
+					    mon == BWTWO_SR_1152_900_76_B)
+						p = bw2regs_76hz;
+					else
+						p = bw2regs_66hz;
+					break;
+				default:
+					prom_printf("bw2: can't handle SR %02x\n",
+						    status);
+					prom_halt();
+					return NULL; /* fool gcc. */
+			}
+			for ( ; *p; p += 2)
+				((u8 *)fb->s.bw2.regs)[p[0]] = p[1];
+		}
+	}
+
+	strcpy(fb->info.modename, "BWtwo");
+	strcpy(fix->id, "BWtwo");
+	fix->line_length = fb->var.xres_virtual>>3;
+	
+	disp->scrollmode = SCROLL_YREDRAW;
+	if (!disp->screen_base)
+		disp->screen_base = (char *)sparc_alloc_io(phys, 0, 
+			type->fb_size, "bw2_ram", fb->iospace, 0);
+	disp->screen_base += (fix->line_length * fb->y_margin + fb->x_margin) >> 3;
+	fb->dispsw = fbcon_mfb;
+	fix->visual = FB_VISUAL_MONO01;
+
+	fb->blank = bw2_blank;
+	fb->unblank = bw2_unblank;
+	fb->margins = bw2_margins;
+	
+	fb->physbase = phys;
+	fb->mmap_map = bw2_mmap_map;
+
+#ifdef __sparc_v9__
+	sprintf(idstring, "bwtwo at %016lx", phys);
+#else	
+	sprintf(idstring, "bwtwo at %x.%08lx", fb->iospace, phys);
+#endif
+	
+	return idstring;
+}