1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/media/sprd_scale/common/compat_img_scale.c b/drivers/media/sprd_scale/common/compat_img_scale.c
new file mode 100644
index 00000000..f7b72a81
--- /dev/null
+++ b/drivers/media/sprd_scale/common/compat_img_scale.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2012 Spreadtrum Communications Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/compat.h>
+#include <linux/fs.h>
+#include <linux/uaccess.h>
+#include <video/sprd_scale_k.h>
+#include "img_scale.h"
+#include "compat_img_scale.h"
+
+struct compat_scale_frame_param_t {
+	struct scale_size_t input_size;
+	struct scale_rect_t input_rect;
+	enum scale_fmt_e input_format;
+	struct scale_addr_t input_addr;
+	struct scale_endian_sel_t input_endian;
+	struct scale_size_t output_size;
+	enum scale_fmt_e output_format;
+	struct scale_addr_t output_addr;
+	struct scale_endian_sel_t output_endian;
+	enum scale_mode_e scale_mode;
+	uint32_t slice_height;
+	compat_caddr_t coeff_addr;
+};
+
+#define COMPAT_SCALE_IO_START     _IOW(SCALE_IO_MAGIC, 0, struct compat_scale_frame_param_t)
+
+static long compat_get_scale_frame_param(
+			struct scale_frame_param_t *kp,
+			struct compat_scale_frame_param_t __user *up)
+{
+	compat_caddr_t tmp;
+
+	if (!access_ok(VERIFY_READ, up, sizeof(struct compat_scale_frame_param_t)) ||
+		copy_from_user(&kp->input_size, &up->input_size, sizeof(struct scale_size_t)) ||
+		copy_from_user(&kp->input_rect, &up->input_rect, sizeof(struct scale_rect_t)) ||
+		get_user(kp->input_format, &up->input_format) ||
+		copy_from_user(&kp->input_addr, &up->input_addr, sizeof(struct scale_addr_t)) ||
+		copy_from_user(&kp->input_endian, &up->input_endian, sizeof(struct scale_endian_sel_t)) ||
+		copy_from_user(&kp->output_size, &up->output_size, sizeof(struct scale_size_t)) ||
+		get_user(kp->output_format, &up->output_format) ||
+		copy_from_user(&kp->output_addr, &up->output_addr, sizeof(struct scale_addr_t)) ||
+		copy_from_user(&kp->output_endian, &up->output_endian, sizeof(struct scale_endian_sel_t)) ||
+		get_user(kp->scale_mode, &up->scale_mode) ||
+		get_user(kp->slice_height, &up->slice_height) ||
+		get_user(tmp, &up->coeff_addr))
+			return -EFAULT;
+	kp->coeff_addr = compat_ptr(tmp);
+	return 0;
+}
+
+long compat_scale_k_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	struct scale_frame_param_t karg;
+	void __user *up = compat_ptr(arg);
+	int compatible_arg = 1;
+	long err = 0;
+
+	if (!filp->f_op || !filp->f_op->unlocked_ioctl)
+		return -ENOTTY;
+
+	switch (cmd) {
+	case COMPAT_SCALE_IO_START:
+		err = compat_get_scale_frame_param(&karg, up);
+		cmd = SCALE_IO_START;
+		compatible_arg = 0;
+		break;
+
+	default:
+		break;
+	}
+	if (err)
+		return err;
+
+	if (compatible_arg)
+		err = filp->f_op->unlocked_ioctl(filp, cmd, (unsigned long)up);
+	else {
+		mm_segment_t old_fs = get_fs();
+
+		set_fs(KERNEL_DS);
+		err = filp->f_op->unlocked_ioctl(filp, cmd, (unsigned long)&karg);
+		set_fs(old_fs);
+	}
+	return err;
+}