// 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) 2010 - 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 "system_global.h"
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#ifdef ISP2401
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#include "assert_support.h"
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#include "platform_support.h"
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#include "ia_css_isys.h"
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#include "bitop_support.h"
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#include "isys_dma_rmgr.h"
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static isys_dma_rsrc_t isys_dma_rsrc[N_ISYS2401_DMA_ID];
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void ia_css_isys_dma_channel_rmgr_init(void)
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{
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memset(&isys_dma_rsrc, 0, sizeof(isys_dma_rsrc_t));
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}
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void ia_css_isys_dma_channel_rmgr_uninit(void)
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{
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memset(&isys_dma_rsrc, 0, sizeof(isys_dma_rsrc_t));
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}
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bool ia_css_isys_dma_channel_rmgr_acquire(
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isys2401_dma_ID_t dma_id,
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isys2401_dma_channel *channel)
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{
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bool retval = false;
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isys2401_dma_channel i;
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isys2401_dma_channel max_dma_channel;
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isys_dma_rsrc_t *cur_rsrc = NULL;
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assert(dma_id < N_ISYS2401_DMA_ID);
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assert(channel);
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max_dma_channel = N_ISYS2401_DMA_CHANNEL_PROCS[dma_id];
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cur_rsrc = &isys_dma_rsrc[dma_id];
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if (cur_rsrc->num_active < max_dma_channel) {
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for (i = ISYS2401_DMA_CHANNEL_0; i < N_ISYS2401_DMA_CHANNEL; i++) {
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if (bitop_getbit(cur_rsrc->active_table, i) == 0) {
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bitop_setbit(cur_rsrc->active_table, i);
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*channel = i;
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cur_rsrc->num_active++;
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retval = true;
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break;
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}
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}
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}
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return retval;
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}
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void ia_css_isys_dma_channel_rmgr_release(
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isys2401_dma_ID_t dma_id,
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isys2401_dma_channel *channel)
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{
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isys2401_dma_channel max_dma_channel;
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isys_dma_rsrc_t *cur_rsrc = NULL;
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assert(dma_id < N_ISYS2401_DMA_ID);
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assert(channel);
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max_dma_channel = N_ISYS2401_DMA_CHANNEL_PROCS[dma_id];
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cur_rsrc = &isys_dma_rsrc[dma_id];
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if ((*channel < max_dma_channel) && (cur_rsrc->num_active > 0)) {
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if (bitop_getbit(cur_rsrc->active_table, *channel) == 1) {
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bitop_clearbit(cur_rsrc->active_table, *channel);
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cur_rsrc->num_active--;
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}
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}
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}
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#endif
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