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/*
* tiler_rot.c
*
* TILER driver support functions for TI OMAP processors.
*
* Copyright (C) 2009-2010 Texas Instruments, Inc.
*
* This package is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <mach/tiler.h>
#include "tiler_def.h"
#define DMM_SHIFT_PER_X_8 0
#define DMM_SHIFT_PER_Y_8 0
#define DMM_SHIFT_PER_X_16 0
#define DMM_SHIFT_PER_Y_16 1
#define DMM_SHIFT_PER_X_32 1
#define DMM_SHIFT_PER_Y_32 1
#define DMM_SHIFT_PER_X_PAGE 6
#define DMM_SHIFT_PER_Y_PAGE 6
#define DMM_TILER_THE(NAME) (1 << DMM_TILER_##NAME##_BITS)
#define DMM_TILER_THE_(N, NAME) (1 << DMM_TILER_##NAME##_BITS_(N))
#define DMM_TILER_CONT_WIDTH_BITS 14
#define DMM_TILER_CONT_HEIGHT_BITS 13
#define DMM_SHIFT_PER_P_(N) (DMM_SHIFT_PER_X_##N + DMM_SHIFT_PER_Y_##N)
#define DMM_TILER_CONT_HEIGHT_BITS_(N) \
(DMM_TILER_CONT_HEIGHT_BITS - DMM_SHIFT_PER_Y_##N)
#define DMM_TILER_CONT_WIDTH_BITS_(N) \
(DMM_TILER_CONT_WIDTH_BITS - DMM_SHIFT_PER_X_##N)
#define DMM_TILER_MASK(bits) ((1 << (bits)) - 1)
#define DMM_TILER_GET_OFFSET_(N, var) \
((((u32) var) & DMM_TILER_MASK(DMM_TILER_CONT_WIDTH_BITS + \
DMM_TILER_CONT_HEIGHT_BITS)) >> DMM_SHIFT_PER_P_(N))
#define DMM_TILER_GET_0_X_(N, var) \
(DMM_TILER_GET_OFFSET_(N, var) & \
DMM_TILER_MASK(DMM_TILER_CONT_WIDTH_BITS_(N)))
#define DMM_TILER_GET_0_Y_(N, var) \
(DMM_TILER_GET_OFFSET_(N, var) >> DMM_TILER_CONT_WIDTH_BITS_(N))
#define DMM_TILER_GET_90_X_(N, var) \
(DMM_TILER_GET_OFFSET_(N, var) & \
DMM_TILER_MASK(DMM_TILER_CONT_HEIGHT_BITS_(N)))
#define DMM_TILER_GET_90_Y_(N, var) \
(DMM_TILER_GET_OFFSET_(N, var) >> DMM_TILER_CONT_HEIGHT_BITS_(N))
#define DMM_TILER_STRIDE_0_(N) \
(DMM_TILER_THE(CONT_WIDTH) << DMM_SHIFT_PER_Y_##N)
#define DMM_TILER_STRIDE_90_(N) \
(DMM_TILER_THE(CONT_HEIGHT) << DMM_SHIFT_PER_X_##N)
void tiler_get_natural_xy(u32 tsptr, u32 *x, u32 *y)
{
u32 x_bits, y_bits, offset;
enum tiler_fmt fmt;
fmt = TILER_GET_ACC_MODE(tsptr);
switch (fmt) {
case TILFMT_8BIT:
x_bits = DMM_TILER_CONT_WIDTH_BITS_(8);
y_bits = DMM_TILER_CONT_HEIGHT_BITS_(8);
offset = DMM_TILER_GET_OFFSET_(8, tsptr);
break;
case TILFMT_16BIT:
x_bits = DMM_TILER_CONT_WIDTH_BITS_(16);
y_bits = DMM_TILER_CONT_HEIGHT_BITS_(16);
offset = DMM_TILER_GET_OFFSET_(16, tsptr);
break;
case TILFMT_32BIT:
x_bits = DMM_TILER_CONT_WIDTH_BITS_(32);
y_bits = DMM_TILER_CONT_HEIGHT_BITS_(32);
offset = DMM_TILER_GET_OFFSET_(32, tsptr);
break;
case TILFMT_PAGE:
default:
x_bits = DMM_TILER_CONT_WIDTH_BITS_(PAGE);
y_bits = DMM_TILER_CONT_HEIGHT_BITS_(PAGE);
offset = DMM_TILER_GET_OFFSET_(PAGE, tsptr);
break;
}
if (DMM_GET_ROTATED(tsptr)) {
*x = offset >> y_bits;
*y = offset & DMM_TILER_MASK(y_bits);
} else {
*x = offset & DMM_TILER_MASK(x_bits);
*y = offset >> x_bits;
}
if (DMM_GET_X_INVERTED(tsptr))
*x ^= DMM_TILER_MASK(x_bits);
if (DMM_GET_Y_INVERTED(tsptr))
*y ^= DMM_TILER_MASK(y_bits);
}
u32 tiler_get_address(struct tiler_view_orient orient,
enum tiler_fmt fmt, u32 x, u32 y)
{
u32 x_bits, y_bits, tmp, x_mask, y_mask, alignment;
switch (fmt) {
case TILFMT_8BIT:
x_bits = DMM_TILER_CONT_WIDTH_BITS_(8);
y_bits = DMM_TILER_CONT_HEIGHT_BITS_(8);
alignment = DMM_SHIFT_PER_P_(8);
break;
case TILFMT_16BIT:
x_bits = DMM_TILER_CONT_WIDTH_BITS_(16);
y_bits = DMM_TILER_CONT_HEIGHT_BITS_(16);
alignment = DMM_SHIFT_PER_P_(16);
break;
case TILFMT_32BIT:
x_bits = DMM_TILER_CONT_WIDTH_BITS_(32);
y_bits = DMM_TILER_CONT_HEIGHT_BITS_(32);
alignment = DMM_SHIFT_PER_P_(32);
break;
case TILFMT_PAGE:
default:
x_bits = DMM_TILER_CONT_WIDTH_BITS_(PAGE);
y_bits = DMM_TILER_CONT_HEIGHT_BITS_(PAGE);
alignment = DMM_SHIFT_PER_P_(PAGE);
break;
}
x_mask = DMM_TILER_MASK(x_bits);
y_mask = DMM_TILER_MASK(y_bits);
if (x < 0 || x > x_mask || y < 0 || y > y_mask)
return 0;
if (orient.x_invert)
x ^= x_mask;
if (orient.y_invert)
y ^= y_mask;
if (orient.rotate_90)
tmp = ((x << y_bits) + y);
else
tmp = ((y << x_bits) + x);
return (u32)
TIL_ADDR((tmp << alignment), (orient.rotate_90 ? 1 : 0),
(orient.y_invert ? 1 : 0), (orient.x_invert ? 1 : 0),
fmt);
}
u32 tiler_reorient_addr(u32 tsptr, struct tiler_view_orient orient)
{
u32 x, y;
tiler_get_natural_xy(tsptr, &x, &y);
return tiler_get_address(orient, TILER_GET_ACC_MODE(tsptr), x, y);
}
EXPORT_SYMBOL(tiler_reorient_addr);
u32 tiler_get_natural_addr(void *sys_ptr)
{
return (u32)sys_ptr & DMM_ALIAS_VIEW_CLEAR;
}
EXPORT_SYMBOL(tiler_get_natural_addr);
u32 tiler_reorient_topleft(u32 tsptr, struct tiler_view_orient orient,
u32 width, u32 height)
{
enum tiler_fmt fmt;
u32 x, y;
fmt = TILER_GET_ACC_MODE(tsptr);
tiler_get_natural_xy(tsptr, &x, &y);
if (DMM_GET_X_INVERTED(tsptr))
x -= width - 1;
if (DMM_GET_Y_INVERTED(tsptr))
y -= height - 1;
if (orient.x_invert)
x += width - 1;
if (orient.y_invert)
y += height - 1;
return tiler_get_address(orient, fmt, x, y);
}
EXPORT_SYMBOL(tiler_reorient_topleft);
u32 tiler_stride(u32 tsptr)
{
enum tiler_fmt fmt;
fmt = TILER_GET_ACC_MODE(tsptr);
switch (fmt) {
case TILFMT_8BIT:
return DMM_GET_ROTATED(tsptr) ?
DMM_TILER_STRIDE_90_(8) : DMM_TILER_STRIDE_0_(8);
case TILFMT_16BIT:
return DMM_GET_ROTATED(tsptr) ?
DMM_TILER_STRIDE_90_(16) : DMM_TILER_STRIDE_0_(16);
case TILFMT_32BIT:
return DMM_GET_ROTATED(tsptr) ?
DMM_TILER_STRIDE_90_(32) : DMM_TILER_STRIDE_0_(32);
default:
return 0;
}
}
EXPORT_SYMBOL(tiler_stride);
void tiler_rotate_view(struct tiler_view_orient *orient, u32 rotation)
{
rotation = (rotation / 90) & 3;
if (rotation & 2) {
orient->x_invert = !orient->x_invert;
orient->y_invert = !orient->y_invert;
}
if (rotation & 1) {
if (orient->rotate_90)
orient->y_invert = !orient->y_invert;
else
orient->x_invert = !orient->x_invert;
orient->rotate_90 = !orient->rotate_90;
}
}
EXPORT_SYMBOL(tiler_rotate_view);
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