84 lines
3.4 KiB
C
84 lines
3.4 KiB
C
/*******************************************************************************
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* DISCLAIMER
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* This software is supplied by Renesas Electronics Corporation and is only
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* intended for use with Renesas products. No other uses are authorized. This
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* software is owned by Renesas Electronics Corporation and is protected under
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* all applicable laws, including copyright laws.
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* THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS MAKES NO WARRANTIES REGARDING
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* THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT
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* LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
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* AND NON-INFRINGEMENT. ALL SUCH WARRANTIES ARE EXPRESSLY DISCLAIMED.
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* TO THE MAXIMUM EXTENT PERMITTED NOT PROHIBITED BY LAW, NEITHER RENESAS
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* ELECTRONICS CORPORATION NOR ANY OF ITS AFFILIATED COMPANIES SHALL BE LIABLE
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* FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR
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* ANY REASON RELATED TO THIS SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE
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* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
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* Renesas reserves the right, without notice, to make changes to this software
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* and to discontinue the availability of this software. By using this software,
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* you agree to the additional terms and conditions found by accessing the
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* following link:
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* http://www.renesas.com/disclaimer
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* Copyright 2021-2024 Renesas Electronics Corporation All rights reserved.
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*******************************************************************************/
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/*******************************************************************************
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* DESCRIPTION : CPG initialize
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******************************************************************************/
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/******************************************************************************
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* @file cpg.c
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* - Version : 0.03
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* @brief Initial setting process of CPG.
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* .
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*****************************************************************************/
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/******************************************************************************
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* History : DD.MM.YYYY Version Description
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* : 28.07.2021 0.01 First Release
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* : 03.09.2021 0.02 Move cpg_reg_write function to cpg.h.
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* : 27.12.2024 0.03 Add set_srcr function.
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*****************************************************************************/
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#include <cpg.h>
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#include <cnf_tbl.h>
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#if (RCAR_LSI == RCAR_V4H)
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#include <cpg_register.h>
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#endif /* RCAR_LSI == RCAR_V4H */
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/* CPG write protect value */
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#define CPGWPCR_PASSWORD (0xA5A50000U)
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#define CPGWPCR_WPE ((uint32_t)1U << 0U)
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#define CPGWPCR_WPE_VALID (0U)
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#if (RCAR_LSI == RCAR_V4H)
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static void set_srcr(void);
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#endif /* RCAR_LSI == RCAR_V4H */
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void cpg_init(void)
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{
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/* Release CPG write protect */
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if((mem_read32(CPG_CPGWPCR) & CPGWPCR_WPE) != CPGWPCR_WPE_VALID)
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{
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mem_write32(CPG_CPGWPR, ~(uint32_t)(CPGWPCR_PASSWORD));
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mem_write32(CPG_CPGWPCR, CPGWPCR_PASSWORD);
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/* bit in WPE = 0? */
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while ((mem_read32(CPG_CPGWPCR) & CPGWPCR_WPE) != CPGWPCR_WPE_VALID)
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{
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;
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}
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}
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#if (RCAR_LSI == RCAR_V4H)
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set_srcr();
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#endif /* RCAR_LSI == RCAR_V4H */
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}
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/* End of function cpg_init(void) */
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#if (RCAR_LSI == RCAR_V4H)
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static void set_srcr(void)
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{
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mem_write32(CPG_SRCR28, CPGSRCR28_VAL);
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mem_write32(CPG_SRCR29, CPGSRCR29_VAL);
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}
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/* End of function set_srcr(void) */
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#endif /* RCAR_LSI == RCAR_V4H */
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