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/*
* Support for Intel Camera Imaging ISP subsystem.
* Copyright (c) 2010-2015, 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.
*/
/* The name "gdc.h is already taken" */
#include "gdc_device.h"
#include "device_access.h"
#include "assert_support.h"
/*
* Local function declarations
*/
static inline void gdc_reg_store(
const gdc_ID_t ID,
const unsigned int reg,
const hrt_data value);
static inline hrt_data gdc_reg_load(
const gdc_ID_t ID,
const unsigned int reg);
#ifndef __INLINE_GDC__
#include "gdc_private.h"
#endif /* __INLINE_GDC__ */
/*
* Exported function implementations
*/
void gdc_lut_store(
const gdc_ID_t ID,
const int data[4][HRT_GDC_N])
{
unsigned int i, lut_offset = HRT_GDC_LUT_IDX;
assert(ID < N_GDC_ID);
assert(HRT_GDC_LUT_COEFF_OFFSET <= (4*sizeof(hrt_data)));
for (i = 0; i < HRT_GDC_N; i++) {
hrt_data entry_0 = data[0][i] & HRT_GDC_BCI_COEF_MASK;
hrt_data entry_1 = data[1][i] & HRT_GDC_BCI_COEF_MASK;
hrt_data entry_2 = data[2][i] & HRT_GDC_BCI_COEF_MASK;
hrt_data entry_3 = data[3][i] & HRT_GDC_BCI_COEF_MASK;
hrt_data word_0 = entry_0 |
(entry_1 << HRT_GDC_LUT_COEFF_OFFSET);
hrt_data word_1 = entry_2 |
(entry_3 << HRT_GDC_LUT_COEFF_OFFSET);
gdc_reg_store(ID, lut_offset++, word_0);
gdc_reg_store(ID, lut_offset++, word_1);
}
return;
}
/*
* Input LUT format:
* c0[0-1023], c1[0-1023], c2[0-1023] c3[0-1023]
*
* Output LUT format (interleaved):
* c0[0], c1[0], c2[0], c3[0], c0[1], c1[1], c2[1], c3[1], ....
* c0[1023], c1[1023], c2[1023], c3[1023]
*
* The first format needs c0[0], c1[0] (which are 1024 words apart)
* to program gdc LUT registers. This makes it difficult to do piecemeal
* reads in SP side gdc_lut_store
*
* Interleaved format allows use of contiguous bytes to store into
* gdc LUT registers.
*
* See gdc_lut_store() definition in host/gdc.c vs sp/gdc_private.h
*
*/
void gdc_lut_convert_to_isp_format(const int in_lut[4][HRT_GDC_N],
int out_lut[4][HRT_GDC_N])
{
unsigned int i;
int *out = (int *)out_lut;
for (i = 0; i < HRT_GDC_N; i++) {
out[0] = in_lut[0][i];
out[1] = in_lut[1][i];
out[2] = in_lut[2][i];
out[3] = in_lut[3][i];
out += 4;
}
}
int gdc_get_unity(
const gdc_ID_t ID)
{
assert(ID < N_GDC_ID);
(void)ID;
return (int)(1UL << HRT_GDC_FRAC_BITS);
}
/*
* Local function implementations
*/
static inline void gdc_reg_store(
const gdc_ID_t ID,
const unsigned int reg,
const hrt_data value)
{
ia_css_device_store_uint32(GDC_BASE[ID] + reg*sizeof(hrt_data), value);
return;
}
static inline hrt_data gdc_reg_load(
const gdc_ID_t ID,
const unsigned int reg)
{
return ia_css_device_load_uint32(GDC_BASE[ID] + reg*sizeof(hrt_data));
}
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