1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_frac.h b/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_frac.h
new file mode 100644
index 000000000000..1d1771d71f3c
--- /dev/null
+++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_frac.h
@@ -0,0 +1,40 @@
+/*
+ * Support for Intel Camera Imaging ISP subsystem.
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ */
+
+#ifndef __SH_CSS_FRAC_H
+#define __SH_CSS_FRAC_H
+
+#include <math_support.h>
+
+#define sISP_REG_BIT		      ISP_VEC_ELEMBITS
+#define uISP_REG_BIT		      ((unsigned)(sISP_REG_BIT-1))
+#define sSHIFT				    (16-sISP_REG_BIT)
+#define uSHIFT				    ((unsigned)(16-uISP_REG_BIT))
+#define sFRACTION_BITS_FITTING(a) (a-sSHIFT)
+#define uFRACTION_BITS_FITTING(a) ((unsigned)(a-uSHIFT))
+#define sISP_VAL_MIN		      (-(1<<uISP_REG_BIT))
+#define sISP_VAL_MAX		      ((1<<uISP_REG_BIT)-1)
+#define uISP_VAL_MIN		      ((unsigned)0)
+#define uISP_VAL_MAX		      ((unsigned)((1<<uISP_REG_BIT)-1))
+
+/* a:fraction bits for 16bit precision, b:fraction bits for ISP precision */
+#define sDIGIT_FITTING(v, a, b) \
+	min(max((((v)>>sSHIFT) >> max(sFRACTION_BITS_FITTING(a)-(b), 0)), \
+	  sISP_VAL_MIN), sISP_VAL_MAX)
+#define uDIGIT_FITTING(v, a, b) \
+	min((unsigned)max((unsigned)(((v)>>uSHIFT) \
+	>> max((int)(uFRACTION_BITS_FITTING(a)-(b)), 0)), \
+	  uISP_VAL_MIN), uISP_VAL_MAX)
+
+#endif /* __SH_CSS_FRAC_H */