diff options
Diffstat (limited to 'drivers/staging/media/atomisp/pci/atomisp2/css2400/hive_isp_css_shared/host/tag.c')
-rw-r--r-- | drivers/staging/media/atomisp/pci/atomisp2/css2400/hive_isp_css_shared/host/tag.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/hive_isp_css_shared/host/tag.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/hive_isp_css_shared/host/tag.c new file mode 100644 index 000000000000..9aa8c168a803 --- /dev/null +++ b/drivers/staging/media/atomisp/pci/atomisp2/css2400/hive_isp_css_shared/host/tag.c @@ -0,0 +1,95 @@ +/* + * 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. + */ + +#include "tag.h" +#include <platform_support.h> /* NULL */ +#include <assert_support.h> +#include "tag_local.h" + +/** + * @brief Creates the tag description from the given parameters. + * @param[in] num_captures + * @param[in] skip + * @param[in] offset + * @param[out] tag_descr + */ +void +sh_css_create_tag_descr(int num_captures, + unsigned int skip, + int offset, + unsigned int exp_id, + struct sh_css_tag_descr *tag_descr) +{ + assert(tag_descr != NULL); + + tag_descr->num_captures = num_captures; + tag_descr->skip = skip; + tag_descr->offset = offset; + tag_descr->exp_id = exp_id; +} + +/** + * @brief Encodes the members of tag description into a 32-bit value. + * @param[in] tag Pointer to the tag description + * @return (unsigned int) Encoded 32-bit tag-info + */ +unsigned int +sh_css_encode_tag_descr(struct sh_css_tag_descr *tag) +{ + int num_captures; + unsigned int num_captures_sign; + unsigned int skip; + int offset; + unsigned int offset_sign; + unsigned int exp_id; + unsigned int encoded_tag; + + assert(tag != NULL); + + if (tag->num_captures < 0) { + num_captures = -tag->num_captures; + num_captures_sign = 1; + } else { + num_captures = tag->num_captures; + num_captures_sign = 0; + } + skip = tag->skip; + if (tag->offset < 0) { + offset = -tag->offset; + offset_sign = 1; + } else { + offset = tag->offset; + offset_sign = 0; + } + exp_id = tag->exp_id; + + if (exp_id != 0) + { + /* we encode either an exp_id or capture data */ + assert((num_captures == 0) && (skip == 0) && (offset == 0)); + + encoded_tag = TAG_EXP | (exp_id & 0xFF) << TAG_EXP_ID_SHIFT; + } + else + { + encoded_tag = TAG_CAP + | ((num_captures_sign & 0x00000001) << TAG_NUM_CAPTURES_SIGN_SHIFT) + | ((offset_sign & 0x00000001) << TAG_OFFSET_SIGN_SHIFT) + | ((num_captures & 0x000000FF) << TAG_NUM_CAPTURES_SHIFT) + | ((skip & 0x000000FF) << TAG_OFFSET_SHIFT) + | ((offset & 0x000000FF) << TAG_SKIP_SHIFT); + + } + return encoded_tag; +} |