patch-2.1.124 linux/drivers/char/fbmem.c

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diff -u --recursive --new-file v2.1.123/linux/drivers/char/fbmem.c linux/drivers/char/fbmem.c
@@ -1,654 +0,0 @@
-/*
- *  linux/drivers/char/fbmem.c
- *
- *  Copyright (C) 1994 Martin Schaller
- *
- * 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.
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/major.h>
-#include <linux/malloc.h>
-#include <linux/mman.h>
-#include <linux/tty.h>
-#include <linux/console.h>
-#include <linux/console_struct.h>
-#include <linux/init.h>
-#ifdef CONFIG_PROC_FS
-#include <linux/proc_fs.h>
-#endif
-#ifdef CONFIG_KMOD
-#include <linux/kmod.h>
-#endif
-
-#ifdef __mc68000__
-#include <asm/setup.h>
-#endif
-#ifdef __powerpc__
-#include <asm/io.h>
-#endif
-#include <asm/uaccess.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-
-#include <linux/fb.h>
-
-
-    /*
-     *  Frame buffer device initialization and setup routines
-     */
-
-extern unsigned long acornfb_init(void);
-extern void acornfb_setup(char *options, int *ints);
-extern void amifb_init(void);
-extern void amifb_setup(char *options, int *ints);
-extern void atafb_init(void);
-extern void atafb_setup(char *options, int *ints);
-extern void macfb_init(void);
-extern void macfb_setup(char *options, int *ints);
-extern void cyberfb_init(void);
-extern void cyberfb_setup(char *options, int *ints);
-extern void retz3fb_init(void);
-extern void retz3fb_setup(char *options, int *ints);
-extern void clgenfb_init(void);
-extern void clgenfb_setup(char *options, int *ints);
-extern void vfb_init(void);
-extern void vfb_setup(char *options, int *ints);
-extern void offb_init(void);
-extern void offb_setup(char *options, int *ints);
-extern void atyfb_init(void);
-extern void atyfb_setup(char *options, int *ints);
-extern void dnfb_init(void);
-extern void tgafb_init(void);
-extern void virgefb_init(void);
-extern void virgefb_setup(char *options, int *ints);
-extern void resolver_video_setup(char *options, int *ints);
-extern void s3triofb_init(void);
-extern void s3triofb_setup(char *options, int *ints);
-extern void vgafb_init(void);
-extern void vgafb_setup(char *options, int *ints);
-extern void vesafb_init(void);
-extern void vesafb_setup(char *options, int *ints);
-extern void mdafb_init(void);
-extern void mdafb_setup(char *options, int *ints);
-extern void hpfb_init(void);
-extern void hpfb_setup(char *options, int *ints);
-extern void sbusfb_init(void);
-extern void sbusfb_setup(char *options, int *ints);
-
-static struct {
-	const char *name;
-	void (*init)(void);
-	void (*setup)(char *options, int *ints);
-} fb_drivers[] __initdata = {
-#ifdef CONFIG_FB_RETINAZ3
-	{ "retz3", retz3fb_init, retz3fb_setup },
-#endif
-#ifdef CONFIG_FB_ACORN
-	{ "acorn", acornfb_init, acornfb_setup },
-#endif
-#ifdef CONFIG_FB_AMIGA
-	{ "amifb", amifb_init, amifb_setup },
-#endif
-#ifdef CONFIG_FB_ATARI
-	{ "atafb", atafb_init, atafb_setup },
-#endif
-#ifdef CONFIG_FB_MAC
-	{ "macfb", macfb_init, macfb_setup },
-#endif
-#ifdef CONFIG_FB_CYBER
-	{ "cyber", cyberfb_init, cyberfb_setup },
-#endif
-#ifdef CONFIG_FB_CLGEN
-	{ "clgen", clgenfb_init, clgenfb_setup },
-#endif
-#ifdef CONFIG_FB_OF
-	{ "offb", offb_init, offb_setup },
-#endif
-#ifdef CONFIG_FB_ATY
-	{ "atyfb", atyfb_init, atyfb_setup },
-#endif
-#ifdef CONFIG_APOLLO
-	{ "apollo", dnfb_init, NULL },
-#endif
-#ifdef CONFIG_FB_S3TRIO
-	{ "s3trio", s3triofb_init, s3triofb_setup },
-#endif 
-#ifdef CONFIG_FB_TGA
-	{ "tga", tgafb_init, NULL },
-#endif
-#ifdef CONFIG_FB_VIRGE
-	{ "virge", virgefb_init, virgefb_setup },
-#endif
-#ifdef CONFIG_FB_VGA
-	{ "vga", vgafb_init, vgafb_setup },
-#endif 
-#ifdef CONFIG_FB_VESA
-	{ "vesa", vesafb_init, vesafb_setup },
-#endif 
-#ifdef CONFIG_FB_MDA
-	{ "mda", mdafb_init, mdafb_setup },
-#endif 
-#ifdef CONFIG_FB_HP300
-	{ "hpfb", hpfb_init, hpfb_setup },
-#endif 
-#ifdef CONFIG_FB_SBUS
-	{ "sbus", sbusfb_init, sbusfb_setup },
-#endif
-#ifdef CONFIG_GSP_RESOLVER
-	/* Not a real frame buffer device... */
-	{ "resolver", NULL, resolver_video_setup },
-#endif
-#ifdef CONFIG_FB_VIRTUAL
-	/* Must be last to avoid that vfb becomes your primary display */
-	{ "vfb", vfb_init, vfb_setup },
-#endif
-};
-
-#define NUM_FB_DRIVERS	(sizeof(fb_drivers)/sizeof(*fb_drivers))
-
-static void (*pref_init_funcs[FB_MAX])(void);
-static int num_pref_init_funcs __initdata = 0;
-
-
-#define GET_INODE(i) MKDEV(FB_MAJOR, (i) << FB_MODES_SHIFT)
-#define GET_FB_VAR_IDX(node) (MINOR(node) & ((1 << FB_MODES_SHIFT)-1)) 
-
-struct fb_info *registered_fb[FB_MAX];
-int num_registered_fb = 0;
-
-char con2fb_map[MAX_NR_CONSOLES];
-
-static inline int PROC_CONSOLE(void)
-{
-	if (!current->tty)
-		return fg_console;
-
-	if (current->tty->driver.type != TTY_DRIVER_TYPE_CONSOLE)
-		/* XXX Should report error here? */
-		return fg_console;
-
-	if (MINOR(current->tty->device) < 1)
-		return fg_console;
-
-	return MINOR(current->tty->device) - 1;
-}
-
-#ifdef CONFIG_PROC_FS
-static int fbmem_read_proc(char *buf, char **start, off_t offset,
-			   int len, int *eof, void *private)
-{
-	struct fb_info **fi;
-
-	len = 0;
-	for (fi = registered_fb; fi < &registered_fb[FB_MAX] && len < 4000; fi++)
-		if (*fi)
-			len += sprintf(buf + len, "%d %s\n",
-				       GET_FB_IDX((*fi)->node),
-				       (*fi)->modename);
-	*start = buf + offset;
-	return len > offset ? len - offset : 0;
-}
-#endif
-
-static ssize_t
-fb_read(struct file *file, char *buf, size_t count, loff_t *ppos)
-{
-	unsigned long p = *ppos;
-	struct inode *inode = file->f_dentry->d_inode;
-	int fbidx = GET_FB_IDX(inode->i_rdev);
-	struct fb_info *info = registered_fb[fbidx];
-	struct fb_ops *fb = info->fbops;
-	struct fb_fix_screeninfo fix;
-	char *base_addr;
-	ssize_t copy_size;
-
-	if (! fb || ! info->disp)
-		return -ENODEV;
-
-	fb->fb_get_fix(&fix,PROC_CONSOLE(), info);
-	base_addr=info->disp->screen_base;
-	copy_size=(count + p <= fix.smem_len ? count : fix.smem_len - p);
-	if (copy_to_user(buf, base_addr+p, copy_size))
-	    return -EFAULT;
-	*ppos += copy_size;
-	return copy_size;
-}
-
-static ssize_t
-fb_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
-{
-	unsigned long p = *ppos;
-	struct inode *inode = file->f_dentry->d_inode;
-	int fbidx = GET_FB_IDX(inode->i_rdev);
-	struct fb_info *info = registered_fb[fbidx];
-	struct fb_ops *fb = info->fbops;
-	struct fb_fix_screeninfo fix;
-	char *base_addr;
-	ssize_t copy_size;
-
-	if (! fb || ! info->disp)
-		return -ENODEV;
-
-	fb->fb_get_fix(&fix, PROC_CONSOLE(), info);
-	base_addr=info->disp->screen_base;
-	copy_size=(count + p <= fix.smem_len ? count : fix.smem_len - p);
-	if (copy_from_user(base_addr+p, buf, copy_size))
-	    return -EFAULT;
-	file->f_pos += copy_size;
-	return copy_size;
-}
-
-
-static void set_con2fb_map(int unit, int newidx)
-{
-    int oldidx = con2fb_map[unit];
-    struct fb_info *oldfb, *newfb;
-    struct vc_data *conp;
-
-    if (newidx != con2fb_map[unit]) {
-       oldfb = registered_fb[oldidx];
-       newfb = registered_fb[newidx];
-       if (newfb->fbops->fb_open(newfb,0))
-	   return;
-       oldfb->fbops->fb_release(oldfb,0);
-       conp = fb_display[unit].conp;
-       con2fb_map[unit] = newidx;
-       fb_display[unit] = *(newfb->disp);
-       fb_display[unit].conp = conp;
-       fb_display[unit].fb_info = newfb;
-       if (!newfb->changevar)
-	   newfb->changevar = oldfb->changevar;
-       /* tell console var has changed */
-       if (newfb->changevar)
-	   newfb->changevar(unit);
-    }
-}
-
-#ifdef CONFIG_KMOD
-static void try_to_load(int fb)
-{
-	char modname[16];
-
-	sprintf(modname, "fb%d", fb);
-	request_module(modname);
-}
-#endif /* CONFIG_KMOD */
-
-static int 
-fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
-	 unsigned long arg)
-{
-	int fbidx = GET_FB_IDX(inode->i_rdev);
-	struct fb_info *info = registered_fb[fbidx];
-	struct fb_ops *fb = info->fbops;
-	struct fb_cmap cmap;
-	struct fb_var_screeninfo var;
-	struct fb_fix_screeninfo fix;
-	struct fb_con2fbmap con2fb;
-	int i;
-	
-	if (! fb)
-		return -ENODEV;
-	switch (cmd) {
-	case FBIOGET_VSCREENINFO:
-		if ((i = fb->fb_get_var(&var, PROC_CONSOLE(), info)))
-			return i;
-		return copy_to_user((void *) arg, &var,
-				    sizeof(var)) ? -EFAULT : 0;
-	case FBIOPUT_VSCREENINFO:
-		if (copy_from_user(&var, (void *) arg, sizeof(var)))
-			return -EFAULT;
-		if ((i = fb->fb_set_var(&var, PROC_CONSOLE(), info)))
-			return i;
-		if (copy_to_user((void *) arg, &var, sizeof(var)))
-			return -EFAULT;
-		return 0;
-	case FBIOGET_FSCREENINFO:
-		if ((i = fb->fb_get_fix(&fix, PROC_CONSOLE(), info)))
-			return i;
-		return copy_to_user((void *) arg, &fix, sizeof(fix)) ?
-			-EFAULT : 0;
-	case FBIOPUTCMAP:
-		if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
-			return -EFAULT;
-		return (fb->fb_set_cmap(&cmap, 0, PROC_CONSOLE(), info));
-	case FBIOGETCMAP:
-		if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
-			return -EFAULT;
-		return (fb->fb_get_cmap(&cmap, 0, PROC_CONSOLE(), info));
-	case FBIOPAN_DISPLAY:
-		if (copy_from_user(&var, (void *) arg, sizeof(var)))
-			return -EFAULT;
-		if ((i=fb->fb_pan_display(&var, PROC_CONSOLE(), info)))
-			return i;
-		if (copy_to_user((void *) arg, &var, sizeof(var)))
-			return -EFAULT;
-		return i;
-	case FBIOGET_CON2FBMAP:
-		if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
-			return -EFAULT;
-		if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
-		    return -EINVAL;
-		con2fb.framebuffer = con2fb_map[con2fb.console-1];
-		return copy_to_user((void *)arg, &con2fb,
-				    sizeof(con2fb)) ? -EFAULT : 0;
-	case FBIOPUT_CON2FBMAP:
-		if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
-			return - EFAULT;
-		if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
-		    return -EINVAL;
-		if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
-		    return -EINVAL;
-#ifdef CONFIG_KMOD
-		if (!registered_fb[con2fb.framebuffer])
-		    try_to_load(con2fb.framebuffer);
-#endif /* CONFIG_KMOD */
-		if (!registered_fb[con2fb.framebuffer])
-		    return -EINVAL;
-		if (con2fb.console != 0)
-		    set_con2fb_map(con2fb.console-1, con2fb.framebuffer);
-		else
-		    /* set them all */
-		    for (i = 0; i < MAX_NR_CONSOLES; i++)
-			set_con2fb_map(i, con2fb.framebuffer);
-		return 0;
-	default:
-		return fb->fb_ioctl(inode, file, cmd, arg, PROC_CONSOLE(),
-				    info);
-	}
-}
-
-static int 
-fb_mmap(struct file *file, struct vm_area_struct * vma)
-{
-	int fbidx = GET_FB_IDX(file->f_dentry->d_inode->i_rdev);
-	struct fb_info *info = registered_fb[fbidx];
-	struct fb_ops *fb = info->fbops;
-	struct fb_fix_screeninfo fix;
-	struct fb_var_screeninfo var;
-	unsigned long start;
-	u32 len;
-
-	if (!fb)
-		return -ENODEV;
-	if (fb->fb_mmap)
-		return fb->fb_mmap(info, file, vma);
-	fb->fb_get_fix(&fix, PROC_CONSOLE(), info);
-
-	/* frame buffer memory */
-	start = (unsigned long)fix.smem_start;
-	len = (start & ~PAGE_MASK)+fix.smem_len;
-	start &= PAGE_MASK;
-	len = (len+~PAGE_MASK) & PAGE_MASK;
-	if (vma->vm_offset >= len) {
-		/* memory mapped io */
-		vma->vm_offset -= len;
-		fb->fb_get_var(&var, PROC_CONSOLE(), info);
-		if (var.accel_flags)
-			return -EINVAL;
-		start = (unsigned long)fix.mmio_start;
-		len = (start & ~PAGE_MASK)+fix.mmio_len;
-		start &= PAGE_MASK;
-		len = (len+~PAGE_MASK) & PAGE_MASK;
-	}
-	if ((vma->vm_end - vma->vm_start + vma->vm_offset) > len)
-		return -EINVAL;
-	vma->vm_offset += start;
-	if (vma->vm_offset & ~PAGE_MASK)
-		return -ENXIO;
-#if defined(__mc68000__)
-	if (CPU_IS_020_OR_030)
-		pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
-	if (CPU_IS_040_OR_060) {
-		pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
-		/* Use no-cache mode, serialized */
-		pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
-	}
-#elif defined(__powerpc__)
-	pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE|_PAGE_GUARDED;
-#elif defined(__alpha__)
-	/* Caching is off in the I/O space quadrant by design.  */
-#elif defined(__sparc__)
-	/* Should never get here, all fb drivers should have their own
-	   mmap routines */
-#elif defined(__i386__)
-	if (boot_cpu_data.x86 > 3)
-		pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
-#else
-#warning What do we have to do here??
-#endif
-	if (remap_page_range(vma->vm_start, vma->vm_offset,
-			     vma->vm_end - vma->vm_start, vma->vm_page_prot))
-		return -EAGAIN;
-	vma->vm_file = file;
-	file->f_count++;
-	return 0;
-}
-
-static int
-fb_open(struct inode *inode, struct file *file)
-{
-	int fbidx = GET_FB_IDX(inode->i_rdev);
-	struct fb_info *info;
-
-#ifdef CONFIG_KMOD
-	if (!(info = registered_fb[fbidx]))
-		try_to_load(fbidx);
-#endif /* CONFIG_KMOD */
-	if (!(info = registered_fb[fbidx]))
-		return -ENODEV;
-	return info->fbops->fb_open(info,1);
-}
-
-static int 
-fb_release(struct inode *inode, struct file *file)
-{
-	int fbidx = GET_FB_IDX(inode->i_rdev);
-	struct fb_info *info = registered_fb[fbidx];
-
-	info->fbops->fb_release(info,1);
-	return 0;
-}
-
-static struct file_operations fb_fops = {
-	NULL,		/* lseek	*/
-	fb_read,	/* read		*/
-	fb_write,	/* write	*/
-	NULL,		/* readdir 	*/
-	NULL,		/* poll 	*/
-	fb_ioctl,	/* ioctl 	*/
-	fb_mmap,	/* mmap		*/
-	fb_open,	/* open 	*/
-	NULL,		/* flush	*/
-	fb_release,	/* release 	*/
-	NULL		/* fsync 	*/
-};
-
-int
-register_framebuffer(struct fb_info *fb_info)
-{
-	int i, j;
-	static int fb_ever_opened[FB_MAX];
-	static int first = 1;
-
-	if (num_registered_fb == FB_MAX)
-		return -ENXIO;
-	num_registered_fb++;
-	for (i = 0 ; i < FB_MAX; i++)
-		if (!registered_fb[i])
-			break;
-	fb_info->node=GET_INODE(i);
-	registered_fb[i] = fb_info;
-	if (!fb_ever_opened[i]) {
-		/*
-		 *  We assume initial frame buffer devices can be opened this
-		 *  many times
-		 */
-		for (j = 0; j < MAX_NR_CONSOLES; j++)
-			if (con2fb_map[j] == i)
-				fb_info->fbops->fb_open(fb_info,0);
-		fb_ever_opened[i] = 1;
-	}
-
-	if (first) {
-		first = 0;
-		take_over_console(&fb_con, 0, MAX_NR_CONSOLES-1, 1);
-	}
-
-	return 0;
-}
-
-int
-unregister_framebuffer(const struct fb_info *fb_info)
-{
-	int i, j;
-
-	i = GET_FB_IDX(fb_info->node);
-	for (j = 0; j < MAX_NR_CONSOLES; j++)
-		if (con2fb_map[j] == i)
-			return -EBUSY;
-	if (!registered_fb[i])
-		return -EINVAL; 
-	registered_fb[i]=NULL;
-	num_registered_fb--;
-	return 0;
-}
-
-#ifdef CONFIG_PROC_FS
-static struct proc_dir_entry *proc_fbmem;
-#endif
-
-__initfunc(void
-fbmem_init(void))
-{
-	int i;
-
-#ifdef CONFIG_PROC_FS
-	proc_fbmem = create_proc_entry("fb", 0, 0);
-	if (proc_fbmem)
-		proc_fbmem->read_proc = fbmem_read_proc;
-#endif
-
-	if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
-		printk("unable to get major %d for fb devs\n", FB_MAJOR);
-
-	/*
-	 *  Probe for all builtin frame buffer devices
-	 */
-	for (i = 0; i < num_pref_init_funcs; i++)
-		pref_init_funcs[i]();
-
-	for (i = 0; i < NUM_FB_DRIVERS; i++)
-		if (fb_drivers[i].init)
-			fb_drivers[i].init();
-}
-
-
-int fbmon_valid_timings(u_int pixclock, u_int htotal, u_int vtotal,
-			const struct fb_info *fb_info)
-{
-#if 0
-	/*
-	 * long long divisions .... $#%%#$ 
-	 */
-    unsigned long long hpicos, vpicos;
-    const unsigned long long _1e12 = 1000000000000ULL;
-    const struct fb_monspecs *monspecs = &fb_info->monspecs;
-
-    hpicos = (unsigned long long)htotal*(unsigned long long)pixclock;
-    vpicos = (unsigned long long)vtotal*(unsigned long long)hpicos;
-    if (!vpicos)
-	return 0;
-
-    if (monspecs->hfmin == 0)
-	return 1;
-
-    if (hpicos*monspecs->hfmin > _1e12 || hpicos*monspecs->hfmax < _1e12 ||
-	vpicos*monspecs->vfmin > _1e12 || vpicos*monspecs->vfmax < _1e12)
-	return 0;
-#endif
-    return 1;
-}
-
-int fbmon_dpms(const struct fb_info *fb_info)
-{
-    return fb_info->monspecs.dpms;
-}
-
-
-    /*
-     *  Command line options
-     */
-
-__initfunc(void video_setup(char *options, int *ints))
-{
-    int i, j;
-
-    if (!options || !*options)
-	    return;
-
-    if (!strncmp(options, "map:", 4)) {
-	    options += 4;
-	    if (*options)
-		    for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
-			    if (!options[j])
-				    j = 0;
-			    con2fb_map[i] = (options[j++]-'0') % FB_MAX;
-		    }
-	    return;
-    }
-
-    if (num_pref_init_funcs == FB_MAX)
-	    return;
-
-    for (i = 0; i < NUM_FB_DRIVERS; i++) {
-	    j = strlen(fb_drivers[i].name);
-	    if (!strncmp(options, fb_drivers[i].name, j) &&
-		options[j] == ':') {
-		    if (!strcmp(options+j+1, "off"))
-			    fb_drivers[i].init = NULL;
-		    else {
-			    if (fb_drivers[i].init) {
-				    pref_init_funcs[num_pref_init_funcs++] =
-					    fb_drivers[i].init;
-				    fb_drivers[i].init = NULL;
-			    }
-			    if (fb_drivers[i].setup)
-				    fb_drivers[i].setup(options+j+1, ints);
-		    }
-		    return;
-	    }
-    }
-    /*
-     * If we get here no fb was specified and we default to pass the
-     * options to the first frame buffer that has an init and a setup
-     * function.
-     */
-    for (i = 0; i < NUM_FB_DRIVERS; i++) {
-	    if (fb_drivers[i].init && fb_drivers[i].setup) {
-		    pref_init_funcs[num_pref_init_funcs++] =
-			    fb_drivers[i].init;
-		    fb_drivers[i].init = NULL;
-
-		    fb_drivers[i].setup(options, ints);
-		    return;
-	    }
-    }
-}
-
-
-    /*
-     *  Visible symbols for modules
-     */
-
-EXPORT_SYMBOL(register_framebuffer);
-EXPORT_SYMBOL(unregister_framebuffer);
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov