patch-2.1.124 linux/drivers/video/mdafb.c

• Lines: 481
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.1.123/linux/drivers/video/mdafb.c
• Orig date: Sun Jul 26 11:57:17 1998

diff -u --recursive --new-file v2.1.123/linux/drivers/video/mdafb.c linux/drivers/video/mdafb.c
@@ -1,480 +0,0 @@
-/*
- *  linux/drivers/video/mdafb.c -- MDA frame buffer device
- *
- *	Adapted from vgafb, May 1998 by Andrew Apted
- *
- *  This file is based on vgacon.c and vgafb.c.  Read about their
- *  contributors there.
- *
- *  This file is subject to the terms and conditions of the GNU General Public
- *  License.  See the file COPYING in the main directory of this archive for
- *  more details.
- */
-
-
-/* KNOWN PROBLEMS/TO DO ==================================================== *
- *
- *	-  detecting amount of memory is not yet implemented
- *
- * ========================================================================= */
-
-
-#include <linux/module.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/ioport.h>
-#include <linux/init.h>
-#include <linux/console.h>
-#include <linux/selection.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-
-#include "fbcon.h"
-#include "fbcon-vga.h"
-
-
-#ifdef __powerpc__
-#define VGA_OFFSET _ISA_MEM_BASE;
-#else
-#define VGA_OFFSET 0x0
-#endif
-
-
-static int mda_font_height = 16;   /* !!! */
-
-
-static int currcon = 0;
-static struct display disp;
-static struct fb_info fb_info;
-
-static struct fb_fix_screeninfo fb_fix = { { 0, } };
-static struct fb_var_screeninfo fb_var = { 0, };
-
-
-/* Description of the hardware situation */
-static unsigned char mda_video_type;
-static unsigned long mda_video_mem_base;	/* Base of video memory */
-static unsigned long mda_video_mem_len;		/* End of video memory */
-static u16 mda_video_port_reg;			/* Video register select port */
-static u16 mda_video_port_val;			/* Video register value port */
-static unsigned long mda_video_num_columns;	/* Number of text columns */
-static unsigned long mda_video_num_lines;	/* Number of text lines */
-
-
-    /*
-     *  MDA screen access
-     */ 
-
-static inline void mda_writew(u16 val, u16 *addr)
-{
-#ifdef __powerpc__
-	st_le16(addr, val);
-#else
-	writew(val, (unsigned long)addr);
-#endif /* !__powerpc__ */
-}
-
-static inline u16 mda_readw(u16 *addr)
-{
-#ifdef __powerpc__
-	return ld_le16(addr);
-#else
-	return readw((unsigned long)addr);
-#endif /* !__powerpc__ */	
-}
-
-
-static inline void write_mda(unsigned char reg, unsigned int val)
-{
-	unsigned long flags;
-
-	save_flags(flags); cli();
-
-	outb(reg, mda_video_port_reg);
-	outb(val >> 8, mda_video_port_val);
-	outb(reg+1, mda_video_port_reg);
-	outb(val & 0xff, mda_video_port_val);
-
-	restore_flags(flags);
-}
-
-static inline void mda_set_origin(unsigned short location)
-{
-	write_mda(12, location >> 1);
-}
-
-static inline void mda_set_cursor(int location) 
-{
-	write_mda(14, location >> 1);
-}
-
-
-    /*
-     *  Move hardware mda cursor
-     */
-    
-void fbcon_mdafb_cursor(struct display *p, int mode, int x, int y)
-{
-	switch (mode) {
-		case CM_ERASE:
-			mda_set_cursor(mda_video_mem_len - 1);
-			break;
-
-		case CM_MOVE:
-		case CM_DRAW:
-			mda_set_cursor(y*p->next_line + (x << 1));
-			break;
-	}
-}
-
-
-    /*
-     *  Interface to the low level console driver
-     */
-
-void mdafb_setup(char *options, int *ints);
-static int mdafbcon_switch(int con, struct fb_info *info);
-static int mdafbcon_updatevar(int con, struct fb_info *info);
-static void mdafbcon_blank(int blank, struct fb_info *info);
-
-
-    /*
-     *  Open/Release the frame buffer device
-     */
-
-static int mdafb_open(struct fb_info *info, int user)
-{
-	MOD_INC_USE_COUNT;
-	return 0;
-}
-
-static int mdafb_release(struct fb_info *info, int user)
-{
-	MOD_DEC_USE_COUNT;
-	return 0;
-}
-
-
-    /*
-     *  Get the Fixed Part of the Display
-     */
-
-static int mdafb_get_fix(struct fb_fix_screeninfo *fix, int con,
-			 struct fb_info *info)
-{
-	memcpy(fix, &fb_fix, sizeof(fb_fix));
-	return 0;
-}
-
-
-    /*
-     *  Get the User Defined Part of the Display
-     */
-
-static int mdafb_get_var(struct fb_var_screeninfo *var, int con,
-			 struct fb_info *info)
-{
-	memcpy(var, &fb_var, sizeof(fb_var));
-	return 0;
-}
-
-
-    /*
-     *  Set the User Defined Part of the Display
-     */
-
-static int mdafb_set_var(struct fb_var_screeninfo *var, int con,
-			 struct fb_info *info)
-{
-    struct display *display;
-
-    if (con >= 0)
-	display = &fb_display[con];
-    else
-	display = &disp;	/* used during initialization */
-
-    if (var->xres > fb_var.xres || var->yres > fb_var.yres ||
-	var->xres_virtual > fb_var.xres_virtual ||
-	var->yres_virtual > fb_var.yres_virtual ||
-	var->bits_per_pixel > fb_var.bits_per_pixel ||
-	var->nonstd || !(var->accel_flags & FB_ACCELF_TEXT) ||
-	(var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
-	return -EINVAL;
-
-    memcpy(var, &fb_var, sizeof(fb_var));
-
-    if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
-	display->var = *var;
-	mda_set_origin(var->yoffset/mda_font_height*fb_fix.line_length);
-    }
-
-    return 0;
-}
-
-
-    /*
-     *  Pan or Wrap the Display
-     *
-     *  This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
-     */
-
-static int mdafb_pan_display(struct fb_var_screeninfo *var, int con,
-			     struct fb_info *info)
-{
-	if (var->xoffset || var->yoffset+var->yres > var->yres_virtual)
-		return -EINVAL;
-
-	mda_set_origin(var->yoffset/mda_font_height*fb_fix.line_length);
-	return 0;
-}
-
-
-    /*
-     *  Get the Colormap
-     */
-
-static int mdafb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
-			  struct fb_info *info)
-{
-	/* MDA is simply black and white */
-
-	return 0;
-}
-
-
-    /*
-     *  Set the Colormap
-     */
-
-static int mdafb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
-			  struct fb_info *info)
-{
-	/* MDA is simply black and white */
-
-	return 0;
-}
-
-
-static int mdafb_ioctl(struct inode *inode, struct file *file, u_int cmd,
-		       u_long arg, int con, struct fb_info *info)
-{
-	return -EINVAL;
-}
-
-    /*
-     *  Interface used by the world
-     */
-
-static struct fb_ops mdafb_ops = {
-	mdafb_open, mdafb_release, mdafb_get_fix, mdafb_get_var,
-	mdafb_set_var, mdafb_get_cmap, mdafb_set_cmap, mdafb_pan_display, 
-	mdafb_ioctl
-};
-
-    /*
-     *  MDA text console with hardware cursor
-     */
-
-static struct display_switch fbcon_mdafb = {
-    fbcon_vga_setup, fbcon_vga_bmove, fbcon_vga_clear, fbcon_vga_putc,
-    fbcon_vga_putcs, fbcon_vga_revc, fbcon_mdafb_cursor, NULL, NULL,
-    FONTWIDTH(8)
-};
-
-
-    /*
-     *  Initialisation
-     */
-
-__initfunc(void mdafb_init(void))
-{
-    u16 saved;
-    u16 *p;
-
-    mda_video_num_lines = 25;
-    mda_video_num_columns = 80;
-    mda_video_type = VIDEO_TYPE_MDA;
-    mda_video_mem_base = 0xb0000 + VGA_OFFSET;
-    mda_video_mem_len  = 0x01000;
-    mda_video_port_reg = 0x3b4;
-    mda_video_port_val = 0x3b5;
-
-    strcpy(fb_fix.id, "MDA-Dual-Head");
-    request_region(0x3b0, 12, "mda-2");
-    request_region(0x3bf, 1, "mda-2");
-
-    /*
-     *	Find out if there is a graphics card present.
-     *	Are there smarter methods around?
-     */
-    p = (u16 *)mda_video_mem_base;
-    saved = mda_readw(p);
-    mda_writew(0xAA55, p);
-    if (mda_readw(p) != 0xAA55) {
-	mda_writew(saved, p);
-	return;
-    }
-    mda_writew(0x55AA, p);
-    if (mda_readw(p) != 0x55AA) {
-	mda_writew(saved, p);
-	return;
-    }
-    mda_writew(saved, p);
-
-    fb_fix.smem_start = (char *) mda_video_mem_base;
-    fb_fix.smem_len = mda_video_mem_len;
-    fb_fix.type = FB_TYPE_TEXT;
-    fb_fix.type_aux = FB_AUX_TEXT_MDA;
-    fb_fix.visual = FB_VISUAL_PSEUDOCOLOR;
-    fb_fix.ypanstep = mda_font_height;
-    fb_fix.xpanstep = 0;
-    fb_fix.ywrapstep = 0;
-    fb_fix.line_length = 2 * mda_video_num_columns;
-    fb_fix.mmio_start = NULL;
-    fb_fix.mmio_len = 0;
-    fb_fix.accel = FB_ACCEL_NONE;
-
-    fb_var.xres = mda_video_num_columns*8;
-    fb_var.yres = mda_video_num_lines * mda_font_height;
-    fb_var.xres_virtual = fb_var.xres;
-    /* the cursor is put at the end of the video memory, hence the -2 */
-    fb_var.yres_virtual = ((fb_fix.smem_len-2)/fb_fix.line_length)*
-			  mda_font_height;
-
-    fb_var.xoffset = fb_var.yoffset = 0;
-    fb_var.bits_per_pixel = 1;
-    fb_var.grayscale = 1;
-    fb_var.red.offset = 0;
-    fb_var.red.length = 0;
-    fb_var.red.msb_right = 0;
-    fb_var.green.offset = 0;
-    fb_var.green.length = 0;
-    fb_var.green.msb_right = 0;
-    fb_var.blue.offset = 0;
-    fb_var.blue.length = 0;
-    fb_var.blue.msb_right = 0;
-    fb_var.transp.offset = 0;
-    fb_var.transp.length = 0;
-    fb_var.transp.msb_right = 0;
-    fb_var.nonstd = 0;
-    fb_var.activate = 0;
-    fb_var.height = fb_var.width = -1;
-    fb_var.accel_flags = FB_ACCELF_TEXT;
-    fb_var.pixclock = 39722;		/* 25.175 MHz */
-    fb_var.left_margin = 40;
-    fb_var.right_margin = 24;
-    fb_var.upper_margin = 39;
-    fb_var.lower_margin = 9;
-    fb_var.hsync_len = 96;
-    fb_var.vsync_len = 2;
-    fb_var.sync = 0;
-    fb_var.vmode = FB_VMODE_NONINTERLACED;
-
-    disp.var = fb_var;
-    disp.cmap.start = 0;
-    disp.cmap.len = 0;
-    disp.cmap.red = NULL;
-    disp.cmap.green = NULL;
-    disp.cmap.blue = NULL;
-    disp.cmap.transp = NULL;
-
-#ifdef __i386__
-    disp.screen_base = ioremap((unsigned long) fb_fix.smem_start, 
-    				fb_fix.smem_len);
-#else
-    disp.screen_base = bus_to_virt((unsigned long) fb_fix.smem_start);
-#endif
-    disp.visual = fb_fix.visual;
-    disp.type = fb_fix.type;
-    disp.type_aux = fb_fix.type_aux;
-    disp.ypanstep = fb_fix.ypanstep;
-    disp.ywrapstep = fb_fix.ywrapstep;
-    disp.line_length = fb_fix.line_length;
-    disp.can_soft_blank = 1;
-    disp.inverse = 0;
-    disp.dispsw = &fbcon_mdafb;
-
-    strcpy(fb_info.modename, fb_fix.id);
-    fb_info.node = -1;
-    fb_info.fbops = &mdafb_ops;
-    fb_info.disp = &disp;
-    fb_info.fontname[0] = '\0';
-    fb_info.changevar = NULL;
-    fb_info.switch_con = &mdafbcon_switch;
-    fb_info.updatevar = &mdafbcon_updatevar;
-    fb_info.blank = &mdafbcon_blank;
-
-    mdafb_set_var(&fb_var, -1, &fb_info);
-
-    if (register_framebuffer(&fb_info) < 0)
-	return;
-
-    printk("fb%d: MDA frame buffer device, using %dK of video memory\n",
-	   GET_FB_IDX(fb_info.node), fb_fix.smem_len>>10);
-}
-
-__initfunc(void mdafb_setup(char *options, int *ints))
-{
-	/* nothing yet */
-}
-
-    /*
-     *  Update the `var' structure (called by fbcon.c)
-     */
-
-static int mdafbcon_updatevar(int con, struct fb_info *info)
-{
-	if (con == currcon) {
-		struct fb_var_screeninfo *var = &fb_display[currcon].var;
-
-		/* hardware scrolling */
-
-		mda_set_origin(var->yoffset / mda_font_height *
-			fb_fix.line_length);
-	}
-
-	return 0;
-}
-
-static int mdafbcon_switch(int con, struct fb_info *info)
-{
-	currcon = con;
-	mdafbcon_updatevar(con, info);
-	return 0;
-}
-
-    /*
-     *  Blank the display.
-     */
-
-static void mdafbcon_blank(int blank, struct fb_info *info)
-{
-	if (blank) {
-		outb_p(0x00, 0x3b8);  /* disable video */
-	} else {
-		outb_p(0x08, 0x3b8);  /* enable video */
-	}
-}
-
-
-#ifdef MODULE
-int init_module(void)
-{
-	mdafb_init();
-	return 0;
-}
-
-void cleanup_module(void)
-{
-	unregister_framebuffer(&fb_info);
-}
-#endif /* MODULE */