[patch 01/12] input: move fixp-arith.h to drivers/input

[Anssi Hannula <anssi.hannula@gmail.com>]

[-- Attachment #1: ff-refactoring-move-fixp-arith.diff --]
[-- Type: text/plain, Size: 6944 bytes --]

Move fixp-arith.h from drivers/usb/input to drivers/input, as the part of
force feedback support that requires trigonometric functions is being moved
there.

hid-lgff.c is temporarily modified to avoid breaking git-bisect.

Signed-off-by: Anssi Hannula <anssi.hannula@gmail.com>

---
 drivers/input/fixp-arith.h     |   90 +++++++++++++++++++++++++++++++++++++++++
 drivers/usb/input/fixp-arith.h |   90 -----------------------------------------
 drivers/usb/input/hid-lgff.c   |    6 +-
 3 files changed, 93 insertions(+), 93 deletions(-)

Index: linux-2.6.17-rc3-git12/drivers/input/fixp-arith.h
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.17-rc3-git12/drivers/input/fixp-arith.h	2006-05-13 23:16:02.000000000 +0300
@@ -0,0 +1,90 @@
+#ifndef _FIXP_ARITH_H
+#define _FIXP_ARITH_H
+
+/*
+ * $$
+ *
+ * Simplistic fixed-point arithmetics.
+ * Hmm, I'm probably duplicating some code :(
+ *
+ * Copyright (c) 2002 Johann Deneux
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Should you need to contact me, the author, you can do so by
+ * e-mail - mail your message to <deneux@ifrance.com>
+ */
+
+#include <linux/types.h>
+
+// The type representing fixed-point values
+typedef s16 fixp_t;
+
+#define FRAC_N 8
+#define FRAC_MASK ((1<<FRAC_N)-1)
+
+// Not to be used directly. Use fixp_{cos,sin}
+static const fixp_t cos_table[45] = {
+	0x0100,	0x00FF,	0x00FF,	0x00FE,	0x00FD,	0x00FC,	0x00FA,	0x00F8,
+	0x00F6,	0x00F3,	0x00F0,	0x00ED,	0x00E9,	0x00E6,	0x00E2,	0x00DD,
+	0x00D9,	0x00D4,	0x00CF,	0x00C9,	0x00C4,	0x00BE,	0x00B8,	0x00B1,
+	0x00AB,	0x00A4,	0x009D,	0x0096,	0x008F,	0x0087,	0x0080,	0x0078,
+	0x0070,	0x0068,	0x005F,	0x0057,	0x004F,	0x0046,	0x003D,	0x0035,
+	0x002C,	0x0023,	0x001A,	0x0011,	0x0008
+};
+
+
+/* a: 123 -> 123.0 */
+static inline fixp_t fixp_new(s16 a)
+{
+	return a<<FRAC_N;
+}
+
+/* a: 0xFFFF -> -1.0
+      0x8000 -> 1.0
+      0x0000 -> 0.0
+*/
+static inline fixp_t fixp_new16(s16 a)
+{
+	return ((s32)a)>>(16-FRAC_N);
+}
+
+static inline fixp_t fixp_cos(unsigned int degrees)
+{
+	int quadrant = (degrees / 90) & 3;
+	unsigned int i = degrees % 90;
+
+	if (quadrant == 1 || quadrant == 3) {
+		i = 89 - i;
+	}
+
+	i >>= 1;
+
+	return (quadrant == 1 || quadrant == 2)? -cos_table[i] : cos_table[i];
+}
+
+static inline fixp_t fixp_sin(unsigned int degrees)
+{
+	return -fixp_cos(degrees + 90);
+}
+
+static inline fixp_t fixp_mult(fixp_t a, fixp_t b)
+{
+	return ((s32)(a*b))>>FRAC_N;
+}
+
+#endif
Index: linux-2.6.17-rc3-git12/drivers/usb/input/fixp-arith.h
===================================================================
--- linux-2.6.17-rc3-git12.orig/drivers/usb/input/fixp-arith.h	2006-05-13 23:15:00.000000000 +0300
+++ /dev/null	1970-01-01 00:00:00.000000000 +0000
@@ -1,90 +0,0 @@
-#ifndef _FIXP_ARITH_H
-#define _FIXP_ARITH_H
-
-/*
- * $$
- *
- * Simplistic fixed-point arithmetics.
- * Hmm, I'm probably duplicating some code :(
- *
- * Copyright (c) 2002 Johann Deneux
- */
-
-/*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Should you need to contact me, the author, you can do so by
- * e-mail - mail your message to <deneux@ifrance.com>
- */
-
-#include <linux/types.h>
-
-// The type representing fixed-point values
-typedef s16 fixp_t;
-
-#define FRAC_N 8
-#define FRAC_MASK ((1<<FRAC_N)-1)
-
-// Not to be used directly. Use fixp_{cos,sin}
-static const fixp_t cos_table[45] = {
-	0x0100,	0x00FF,	0x00FF,	0x00FE,	0x00FD,	0x00FC,	0x00FA,	0x00F8,
-	0x00F6,	0x00F3,	0x00F0,	0x00ED,	0x00E9,	0x00E6,	0x00E2,	0x00DD,
-	0x00D9,	0x00D4,	0x00CF,	0x00C9,	0x00C4,	0x00BE,	0x00B8,	0x00B1,
-	0x00AB,	0x00A4,	0x009D,	0x0096,	0x008F,	0x0087,	0x0080,	0x0078,
-	0x0070,	0x0068,	0x005F,	0x0057,	0x004F,	0x0046,	0x003D,	0x0035,
-	0x002C,	0x0023,	0x001A,	0x0011,	0x0008
-};
-
-
-/* a: 123 -> 123.0 */
-static inline fixp_t fixp_new(s16 a)
-{
-	return a<<FRAC_N;
-}
-
-/* a: 0xFFFF -> -1.0
-      0x8000 -> 1.0
-      0x0000 -> 0.0
-*/
-static inline fixp_t fixp_new16(s16 a)
-{
-	return ((s32)a)>>(16-FRAC_N);
-}
-
-static inline fixp_t fixp_cos(unsigned int degrees)
-{
-	int quadrant = (degrees / 90) & 3;
-	unsigned int i = degrees % 90;
-
-	if (quadrant == 1 || quadrant == 3) {
-		i = 89 - i;
-	}
-
-	i >>= 1;
-
-	return (quadrant == 1 || quadrant == 2)? -cos_table[i] : cos_table[i];
-}
-
-static inline fixp_t fixp_sin(unsigned int degrees)
-{
-	return -fixp_cos(degrees + 90);
-}
-
-static inline fixp_t fixp_mult(fixp_t a, fixp_t b)
-{
-	return ((s32)(a*b))>>FRAC_N;
-}
-
-#endif
Index: linux-2.6.17-rc3-git12/drivers/usb/input/hid-lgff.c
===================================================================
--- linux-2.6.17-rc3-git12.orig/drivers/usb/input/hid-lgff.c	2006-05-13 23:17:47.000000000 +0300
+++ linux-2.6.17-rc3-git12/drivers/usb/input/hid-lgff.c	2006-05-13 23:18:04.000000000 +0300
@@ -37,7 +37,7 @@
 #include <linux/circ_buf.h>
 
 #include "hid.h"
-#include "fixp-arith.h"
+//#include "fixp-arith.h"
 
 
 /* Periodicity of the update */
@@ -445,10 +445,10 @@ static void hid_lgff_timer(unsigned long
 			case FF_CONSTANT: {
 				//TODO: handle envelopes
 				int degrees = effect->effect.direction * 360 >> 16;
-				x += fixp_mult(fixp_sin(degrees),
+	/*			x += fixp_mult(fixp_sin(degrees),
 					       fixp_new16(effect->effect.u.constant.level));
 				y += fixp_mult(-fixp_cos(degrees),
-					       fixp_new16(effect->effect.u.constant.level));
+					       fixp_new16(effect->effect.u.constant.level));*/
 			}       break;
 			case FF_RUMBLE:
 				right += effect->effect.u.rumble.strong_magnitude;

--
Anssi Hannula