// SPDX-License-Identifier: GPL-2.0
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/*
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* Support for Intel Camera Imaging ISP subsystem.
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* Copyright (c) 2015, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include "tag.h"
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#include <platform_support.h> /* NULL */
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#include <assert_support.h>
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#include "tag_local.h"
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/*
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* @brief Creates the tag description from the given parameters.
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* @param[in] num_captures
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* @param[in] skip
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* @param[in] offset
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* @param[out] tag_descr
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*/
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void
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sh_css_create_tag_descr(int num_captures,
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unsigned int skip,
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int offset,
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unsigned int exp_id,
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struct sh_css_tag_descr *tag_descr)
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{
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assert(tag_descr);
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tag_descr->num_captures = num_captures;
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tag_descr->skip = skip;
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tag_descr->offset = offset;
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tag_descr->exp_id = exp_id;
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}
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/*
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* @brief Encodes the members of tag description into a 32-bit value.
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* @param[in] tag Pointer to the tag description
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* @return (unsigned int) Encoded 32-bit tag-info
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*/
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unsigned int
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sh_css_encode_tag_descr(struct sh_css_tag_descr *tag)
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{
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int num_captures;
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unsigned int num_captures_sign;
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unsigned int skip;
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int offset;
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unsigned int offset_sign;
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unsigned int exp_id;
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unsigned int encoded_tag;
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assert(tag);
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if (tag->num_captures < 0) {
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num_captures = -tag->num_captures;
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num_captures_sign = 1;
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} else {
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num_captures = tag->num_captures;
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num_captures_sign = 0;
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}
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skip = tag->skip;
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if (tag->offset < 0) {
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offset = -tag->offset;
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offset_sign = 1;
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} else {
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offset = tag->offset;
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offset_sign = 0;
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}
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exp_id = tag->exp_id;
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if (exp_id != 0) {
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/* we encode either an exp_id or capture data */
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assert((num_captures == 0) && (skip == 0) && (offset == 0));
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encoded_tag = TAG_EXP | (exp_id & 0xFF) << TAG_EXP_ID_SHIFT;
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} else {
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encoded_tag = TAG_CAP
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| ((num_captures_sign & 0x00000001) << TAG_NUM_CAPTURES_SIGN_SHIFT)
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| ((offset_sign & 0x00000001) << TAG_OFFSET_SIGN_SHIFT)
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| ((num_captures & 0x000000FF) << TAG_NUM_CAPTURES_SHIFT)
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| ((skip & 0x000000FF) << TAG_OFFSET_SHIFT)
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| ((offset & 0x000000FF) << TAG_SKIP_SHIFT);
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}
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return encoded_tag;
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}
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