patch-2.1.16 linux/drivers/sbus/char/weitek.c

• Lines: 117
• Date: Fri Dec 13 11:37:37 1996
• Orig file: v2.1.15/linux/drivers/sbus/char/weitek.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.15/linux/drivers/sbus/char/weitek.c linux/drivers/sbus/char/weitek.c
@@ -0,0 +1,116 @@
+/* $Id: weitek.c,v 1.6 1996/11/13 05:10:51 davem Exp $
+ * weitek.c: Tadpole P9100/P9000 console driver
+ *
+ * Copyright (C) 1996 David Redman (djhr@tadpole.co.uk)
+ */
+
+#include <linux/kd.h>
+#include <linux/tty.h>
+#include <linux/malloc.h>
+
+#include <asm/openprom.h>
+#include <asm/sbus.h>
+#include <asm/io.h>
+#include <asm/fbio.h>
+#include <asm/pgtable.h>
+
+#include "../../char/vt_kern.h"
+#include "../../char/selection.h"
+#include "../../char/console_struct.h"
+#include "fb.h"
+#include "cg_common.h"
+
+/*
+ * mmap info
+ */
+#define WEITEK_VRAM_OFFSET	0
+#define WEITEK_VRAM_SIZE	(2*1024*1024)	/* maximum */
+#define WEITEK_GX_REG_OFFSET	WEITEK_VRAM_SIZE
+#define WEITEK_GX_REG_SIZE	8192
+#define WEITEK_VID_REG_OFFSET	(WEITEK_GX_REG_OFFSET+WEITEK_GX_REG_SIZE)
+#define WEITEK_VID_REG_SIZE	0x1000
+
+#define CONTROL_OFFSET	0
+#define RAMDAC_OFFSET	(CONTROL_OFFSET+0x200)
+
+#if 0
+static int
+weitek_mmap(struct inode *inode, struct file *file, struct vm_area_struct *vma,
+	    long base, fbinfo_t *fb)
+{
+	unsigned int size, page, r, map_size;
+	unsigned int map_offset = 0;
+	
+	size = vma->vm_end - vma->vm_start;
+	if (vma->vm_offset & ~PAGE_MASK)
+		return -ENXIO;
+	
+	/* To stop the swapper from even considering these pages */
+	vma->vm_flags |= FB_MMAP_VM_FLAGS; 
+	
+	/* Each page, see which map applies */
+	for (page = 0; page < size; ){
+		switch (vma->vm_offset+page){
+		case WEITEK_VRAM_OFFSET:
+			map_size = size-page;
+			map_offset = get_phys ((uint) fb->base);
+			if (map_size > fb->type.fb_size)
+				map_size = fb->type.fb_size;
+			break;
+		case WEITEK_GX_REG_OFFSET:
+			map_size = size-page;
+			map_offset = get_phys ((uint) fb->base);
+			if (map_size > fb->type.fb_size)
+				map_size = fb->type.fb_size;
+			break;
+		default:
+			map_size = 0;
+			break;
+		}
+		if (!map_size){
+			page += PAGE_SIZE;
+			continue;
+		}
+		if (page + map_size > size)
+			map_size = size - page;
+		r = io_remap_page_range (vma->vm_start+page,
+					 map_offset,
+					 map_size, vma->vm_page_prot,
+					 fb->space);
+		if (r) return -EAGAIN;
+		page += map_size;
+	}
+	vma->vm_inode = inode;
+	inode->i_count++;
+	return 0;
+}
+#endif
+
+#if 0
+static void
+weitek_loadcmap (void *fbinfo, int index, int count)
+{
+	printk("weitek_cmap: unimplemented!\n");
+}
+#endif
+
+__initfunc(void weitek_setup(fbinfo_t *fb, int slot, uint addr, int io))
+{
+	extern struct screen_info screen_info;
+	
+	printk ("weitek%d at 0x%8.8x\n", slot, addr);
+	
+	/* Fill in parameters we left out */
+	fb->type.fb_type	= FBTYPE_NOTSUN1;
+	fb->type.fb_cmsize	= 256;
+	fb->mmap		= 0; /* weitek_mmap; */
+	fb->loadcmap		= 0; /* unimplemented */
+	fb->ioctl		= 0; /* no special ioctls */
+	fb->reset		= 0; /* no special reset */
+	
+	/* Map the card registers */
+	if (!fb->base){
+	    prom_printf ("Missing mapping routine and no address found\n");
+	}
+}
+