diff options
Diffstat (limited to 'drivers/video/fb_sys_fops.c')
-rw-r--r-- | drivers/video/fb_sys_fops.c | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/drivers/video/fb_sys_fops.c b/drivers/video/fb_sys_fops.c deleted file mode 100644 index ff275d7f3eaf..000000000000 --- a/drivers/video/fb_sys_fops.c +++ /dev/null @@ -1,104 +0,0 @@ -/* - * linux/drivers/video/fb_sys_read.c - Generic file operations where - * framebuffer is in system RAM - * - * Copyright (C) 2007 Antonino Daplas <adaplas@pol.net> - * - * 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/fb.h> -#include <linux/module.h> -#include <linux/uaccess.h> - -ssize_t fb_sys_read(struct fb_info *info, char __user *buf, size_t count, - loff_t *ppos) -{ - unsigned long p = *ppos; - void *src; - int err = 0; - unsigned long total_size; - - if (info->state != FBINFO_STATE_RUNNING) - return -EPERM; - - total_size = info->screen_size; - - if (total_size == 0) - total_size = info->fix.smem_len; - - if (p >= total_size) - return 0; - - if (count >= total_size) - count = total_size; - - if (count + p > total_size) - count = total_size - p; - - src = (void __force *)(info->screen_base + p); - - if (info->fbops->fb_sync) - info->fbops->fb_sync(info); - - if (copy_to_user(buf, src, count)) - err = -EFAULT; - - if (!err) - *ppos += count; - - return (err) ? err : count; -} -EXPORT_SYMBOL_GPL(fb_sys_read); - -ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, - size_t count, loff_t *ppos) -{ - unsigned long p = *ppos; - void *dst; - int err = 0; - unsigned long total_size; - - if (info->state != FBINFO_STATE_RUNNING) - return -EPERM; - - total_size = info->screen_size; - - if (total_size == 0) - total_size = info->fix.smem_len; - - if (p > total_size) - return -EFBIG; - - if (count > total_size) { - err = -EFBIG; - count = total_size; - } - - if (count + p > total_size) { - if (!err) - err = -ENOSPC; - - count = total_size - p; - } - - dst = (void __force *) (info->screen_base + p); - - if (info->fbops->fb_sync) - info->fbops->fb_sync(info); - - if (copy_from_user(dst, buf, count)) - err = -EFAULT; - - if (!err) - *ppos += count; - - return (err) ? err : count; -} -EXPORT_SYMBOL_GPL(fb_sys_write); - -MODULE_AUTHOR("Antonino Daplas <adaplas@pol.net>"); -MODULE_DESCRIPTION("Generic file read (fb in system RAM)"); -MODULE_LICENSE("GPL"); |