C++ (Cpp) fb_readl Examples

Example #1

File: fblinear8.cpp Project: matlinuxer2/ucimf-bak

void FBLinear8::RevRect(int x1,int y1,int x2,int y2) {
    assert( x1 >= 0 && x1 < Width() && y1 >=0 && y1 < Height());
    assert( x2 >= 0 && x2 < Width() && y2 >=0 && y2 < Height());
    assert(x1 <= x2 && y1 <= y2);
    __u8* dest = (__u8*)mpBuf + mNextLine * y1 + x1;

    int height = y2 - y1 + 1;
    int width = x2 - x1 + 1;
    int cnt;
    __u8* dest8;
    __u16* dest16;
    __u32 *dest32;
    for(; height--; dest += mNextLine) {
        dest32 = (__u32*)dest;
        for (cnt = width/4; cnt--;) {
            fb_writel(fb_readl(dest32) ^ 0x0f0f0f0f, dest32++);
        }
        if (width & 2) {
            dest16 = (__u16*)dest32;
            fb_writew(fb_readw(dest16) ^ 0x0f0f, dest16++);
            dest32 = (__u32*)dest16;
        }
        if (width & 1) {
            dest8 = (__u8*)dest32;
            fb_writeb(fb_readb(dest8) ^ 0x0f, dest8);
        }
    }
}

Example #2

File: fbmem.c Project: flwh/Alcatel_OT_985_kernel

static ssize_t
fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
	unsigned long p = *ppos;
	struct inode *inode = file->f_path.dentry->d_inode;
	int fbidx = iminor(inode);
	struct fb_info *info = registered_fb[fbidx];
	u32 *buffer, *dst;
	u32 __iomem *src;
	int c, i, cnt = 0, err = 0;
	unsigned long total_size;

	if (!info || ! info->screen_base)
		return -ENODEV;

	if (info->state != FBINFO_STATE_RUNNING)
		return -EPERM;

	if (info->fbops->fb_read)
		return info->fbops->fb_read(info, buf, count, ppos);
	
	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;

	buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
			 GFP_KERNEL);
	if (!buffer)
		return -ENOMEM;

	src = (u32 __iomem *) (info->screen_base + p);

	if (info->fbops->fb_sync)
		info->fbops->fb_sync(info);

	while (count) {
		c  = (count > PAGE_SIZE) ? PAGE_SIZE : count;
		dst = buffer;
		for (i = c >> 2; i--; )
			*dst++ = fb_readl(src++);
		if (c & 3) {
			u8 *dst8 = (u8 *) dst;
			u8 __iomem *src8 = (u8 __iomem *) src;

			for (i = c & 3; i--;)
				*dst8++ = fb_readb(src8++);

			src = (u32 __iomem *) src8;
		}

		if (copy_to_user(buf, buffer, c)) {
			err = -EFAULT;
			break;
		}
		*ppos += c;
		buf += c;
		cnt += c;
		count -= c;
	}