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-rw-r--r--drivers/staging/media/atomisp/pci/atomisp2/css2400/base/circbuf/src/circbuf.c321
1 files changed, 0 insertions, 321 deletions
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/css2400/base/circbuf/src/circbuf.c b/drivers/staging/media/atomisp/pci/atomisp2/css2400/base/circbuf/src/circbuf.c
deleted file mode 100644
index 050d60f0894f..000000000000
--- a/drivers/staging/media/atomisp/pci/atomisp2/css2400/base/circbuf/src/circbuf.c
+++ /dev/null
@@ -1,321 +0,0 @@
-/*
- * 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 "ia_css_circbuf.h"
-
-#include <assert_support.h>
-
-/**********************************************************************
- *
- * Forward declarations.
- *
- **********************************************************************/
-/*
- * @brief Read the oldest element from the circular buffer.
- * Read the oldest element WITHOUT checking whehter the
- * circular buffer is empty or not. The oldest element is
- * also removed out from the circular buffer.
- *
- * @param cb The pointer to the circular buffer.
- *
- * @return the oldest element.
- */
-static inline ia_css_circbuf_elem_t
-ia_css_circbuf_read(ia_css_circbuf_t *cb);
-
-/*
- * @brief Shift a chunk of elements in the circular buffer.
- * A chunk of elements (i.e. the ones from the "start" position
- * to the "chunk_src" position) are shifted in the circular buffer,
- * along the direction of new elements coming.
- *
- * @param cb The pointer to the circular buffer.
- * @param chunk_src The position at which the first element in the chunk is.
- * @param chunk_dest The position to which the first element in the chunk would be shift.
- */
-static inline void ia_css_circbuf_shift_chunk(ia_css_circbuf_t *cb,
- uint32_t chunk_src,
- uint32_t chunk_dest);
-
-/*
- * @brief Get the "val" field in the element.
- *
- * @param elem The pointer to the element.
- *
- * @return the "val" field.
- */
-static inline uint32_t
-ia_css_circbuf_elem_get_val(ia_css_circbuf_elem_t *elem);
-
-/**********************************************************************
- *
- * Non-inline functions.
- *
- **********************************************************************/
-/*
- * @brief Create the circular buffer.
- * Refer to "ia_css_circbuf.h" for details.
- */
-void
-ia_css_circbuf_create(ia_css_circbuf_t *cb,
- ia_css_circbuf_elem_t *elems,
- ia_css_circbuf_desc_t *desc)
-{
- uint32_t i;
-
- OP___assert(desc);
-
- cb->desc = desc;
- /* Initialize to defaults */
- cb->desc->start = 0;
- cb->desc->end = 0;
- cb->desc->step = 0;
-
- for (i = 0; i < cb->desc->size; i++)
- ia_css_circbuf_elem_init(&elems[i]);
-
- cb->elems = elems;
-}
-
-/*
- * @brief Destroy the circular buffer.
- * Refer to "ia_css_circbuf.h" for details.
- */
-void ia_css_circbuf_destroy(ia_css_circbuf_t *cb)
-{
- cb->desc = NULL;
-
- cb->elems = NULL;
-}
-
-/*
- * @brief Pop a value out of the circular buffer.
- * Refer to "ia_css_circbuf.h" for details.
- */
-uint32_t ia_css_circbuf_pop(ia_css_circbuf_t *cb)
-{
- uint32_t ret;
- ia_css_circbuf_elem_t elem;
-
- assert(!ia_css_circbuf_is_empty(cb));
-
- /* read an element from the buffer */
- elem = ia_css_circbuf_read(cb);
- ret = ia_css_circbuf_elem_get_val(&elem);
- return ret;
-}
-
-/*
- * @brief Extract a value out of the circular buffer.
- * Refer to "ia_css_circbuf.h" for details.
- */
-uint32_t ia_css_circbuf_extract(ia_css_circbuf_t *cb, int offset)
-{
- int max_offset;
- uint32_t val;
- uint32_t pos;
- uint32_t src_pos;
- uint32_t dest_pos;
-
- /* get the maximum offest */
- max_offset = ia_css_circbuf_get_offset(cb, cb->desc->start, cb->desc->end);
- max_offset--;
-
- /*
- * Step 1: When the target element is at the "start" position.
- */
- if (offset == 0) {
- val = ia_css_circbuf_pop(cb);
- return val;
- }
-
- /*
- * Step 2: When the target element is out of the range.
- */
- if (offset > max_offset) {
- val = 0;
- return val;
- }
-
- /*
- * Step 3: When the target element is between the "start" and
- * "end" position.
- */
- /* get the position of the target element */
- pos = ia_css_circbuf_get_pos_at_offset(cb, cb->desc->start, offset);
-
- /* get the value from the target element */
- val = ia_css_circbuf_elem_get_val(&cb->elems[pos]);
-
- /* shift the elements */
- src_pos = ia_css_circbuf_get_pos_at_offset(cb, pos, -1);
- dest_pos = pos;
- ia_css_circbuf_shift_chunk(cb, src_pos, dest_pos);
-
- return val;
-}
-
-/*
- * @brief Peek an element from the circular buffer.
- * Refer to "ia_css_circbuf.h" for details.
- */
-uint32_t ia_css_circbuf_peek(ia_css_circbuf_t *cb, int offset)
-{
- int pos;
-
- pos = ia_css_circbuf_get_pos_at_offset(cb, cb->desc->end, offset);
-
- /* get the value at the position */
- return cb->elems[pos].val;
-}
-
-/*
- * @brief Get the value of an element from the circular buffer.
- * Refer to "ia_css_circbuf.h" for details.
- */
-uint32_t ia_css_circbuf_peek_from_start(ia_css_circbuf_t *cb, int offset)
-{
- int pos;
-
- pos = ia_css_circbuf_get_pos_at_offset(cb, cb->desc->start, offset);
-
- /* get the value at the position */
- return cb->elems[pos].val;
-}
-
-/* @brief increase size of a circular buffer.
- * Use 'CAUTION' before using this function. This was added to
- * support / fix issue with increasing size for tagger only
- * Please refer to "ia_css_circbuf.h" for details.
- */
-bool ia_css_circbuf_increase_size(
- ia_css_circbuf_t *cb,
- unsigned int sz_delta,
- ia_css_circbuf_elem_t *elems)
-{
- uint8_t curr_size;
- uint8_t curr_end;
- unsigned int i = 0;
-
- if (!cb || sz_delta == 0)
- return false;
-
- curr_size = cb->desc->size;
- curr_end = cb->desc->end;
- /* We assume cb was pre defined as global to allow
- * increase in size */
- /* FM: are we sure this cannot cause size to become too big? */
- if (((uint8_t)(cb->desc->size + (uint8_t)sz_delta) > cb->desc->size) && ((uint8_t)sz_delta == sz_delta))
- cb->desc->size += (uint8_t)sz_delta;
- else
- return false; /* overflow in size */
-
- /* If elems are passed update them else we assume its been taken
- * care before calling this function */
- if (elems) {
- /* cb element array size will not be increased dynamically,
- * but pointers to new elements can be added at the end
- * of existing pre defined cb element array of
- * size >= new size if not already added */
- for (i = curr_size; i < cb->desc->size; i++)
- cb->elems[i] = elems[i - curr_size];
- }
- /* Fix Start / End */
- if (curr_end < cb->desc->start) {
- if (curr_end == 0) {
- /* Easily fix End */
- cb->desc->end = curr_size;
- } else {
- /* Move elements and fix Start*/
- ia_css_circbuf_shift_chunk(cb,
- curr_size - 1,
- curr_size + sz_delta - 1);
- }
- }
-
- return true;
-}
-
-/****************************************************************
- *
- * Inline functions.
- *
- ****************************************************************/
-/*
- * @brief Get the "val" field in the element.
- * Refer to "Forward declarations" for details.
- */
-static inline uint32_t
-ia_css_circbuf_elem_get_val(ia_css_circbuf_elem_t *elem)
-{
- return elem->val;
-}
-
-/*
- * @brief Read the oldest element from the circular buffer.
- * Refer to "Forward declarations" for details.
- */
-static inline ia_css_circbuf_elem_t
-ia_css_circbuf_read(ia_css_circbuf_t *cb)
-{
- ia_css_circbuf_elem_t elem;
-
- /* get the element from the target position */
- elem = cb->elems[cb->desc->start];
-
- /* clear the target position */
- ia_css_circbuf_elem_init(&cb->elems[cb->desc->start]);
-
- /* adjust the "start" position */
- cb->desc->start = ia_css_circbuf_get_pos_at_offset(cb, cb->desc->start, 1);
- return elem;
-}
-
-/*
- * @brief Shift a chunk of elements in the circular buffer.
- * Refer to "Forward declarations" for details.
- */
-static inline void
-ia_css_circbuf_shift_chunk(ia_css_circbuf_t *cb,
- uint32_t chunk_src, uint32_t chunk_dest)
-{
- int chunk_offset;
- int chunk_sz;
- int i;
-
- /* get the chunk offset and size */
- chunk_offset = ia_css_circbuf_get_offset(cb,
- chunk_src, chunk_dest);
- chunk_sz = ia_css_circbuf_get_offset(cb, cb->desc->start, chunk_src) + 1;
-
- /* shift each element to its terminal position */
- for (i = 0; i < chunk_sz; i++) {
-
- /* copy the element from the source to the destination */
- ia_css_circbuf_elem_cpy(&cb->elems[chunk_src],
- &cb->elems[chunk_dest]);
-
- /* clear the source position */
- ia_css_circbuf_elem_init(&cb->elems[chunk_src]);
-
- /* adjust the source/terminal positions */
- chunk_src = ia_css_circbuf_get_pos_at_offset(cb, chunk_src, -1);
- chunk_dest = ia_css_circbuf_get_pos_at_offset(cb, chunk_dest, -1);
-
- }
-
- /* adjust the index "start" */
- cb->desc->start = ia_css_circbuf_get_pos_at_offset(cb, cb->desc->start, chunk_offset);
-}
-
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