diff options
Diffstat (limited to 'bsps/arm/tms570/start/init_emif_sdram.c')
-rw-r--r-- | bsps/arm/tms570/start/init_emif_sdram.c | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/bsps/arm/tms570/start/init_emif_sdram.c b/bsps/arm/tms570/start/init_emif_sdram.c deleted file mode 100644 index 0b190da321..0000000000 --- a/bsps/arm/tms570/start/init_emif_sdram.c +++ /dev/null @@ -1,96 +0,0 @@ -/* SPDX-License-Identifier: BSD-2-Clause */ - -/** - * @file - * - * @ingroup RTEMSBSPsARMTMS570 - * - * @brief This source file contains the initialization of - * external memory/SDRAM interface. - */ - -/* - * Copyright (C) 2016 Pavel Pisa <pisa@cmp.felk.cvut.cz> - * - * Czech Technical University in Prague - * Zikova 1903/4 - * 166 36 Praha 6 - * Czech Republic - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include <stdint.h> -#include <bsp/tms570.h> -#include <bsp/tms570_hwinit.h> - -void tms570_emif_sdram_init( void ) -{ - uint32_t dummy; - uint32_t sdtimr = 0; - uint32_t sdcr = 0; - - /* Do not run attempt to initialize SDRAM when code is running from it */ - if ( tms570_running_from_sdram() ) - return; - - sdtimr = TMS570_EMIF_SDTIMR_T_RFC_SET( sdtimr, 6 - 1 ); - sdtimr = TMS570_EMIF_SDTIMR_T_RP_SET( sdtimr, 2 - 1 ); - sdtimr = TMS570_EMIF_SDTIMR_T_RCD_SET( sdtimr, 2 - 1 ); - sdtimr = TMS570_EMIF_SDTIMR_T_WR_SET( sdtimr, 2 - 1 ); - sdtimr = TMS570_EMIF_SDTIMR_T_RAS_SET( sdtimr, 4 - 1 ); - sdtimr = TMS570_EMIF_SDTIMR_T_RC_SET( sdtimr, 6 - 1 ); - sdtimr = TMS570_EMIF_SDTIMR_T_RRD_SET( sdtimr, 2 - 1 ); - - TMS570_EMIF.SDTIMR = sdtimr; - - /* Minimum number of ECLKOUT cycles from Self-Refresh exit to any command */ - TMS570_EMIF.SDSRETR = 5; - /* Define the SDRAM refresh period in terms of EMIF_CLK cycles. */ - TMS570_EMIF.SDRCR = 2000; - - /* SR - Self-Refresh mode bit. */ - sdcr |= TMS570_EMIF_SDCR_SR * 0; - /* field: PD - Power Down bit controls entering and exiting of the power-down mode. */ - sdcr |= TMS570_EMIF_SDCR_PD * 0; - /* PDWR - Perform refreshes during power down. */ - sdcr |= TMS570_EMIF_SDCR_PDWR * 0; - /* NM - Narrow mode bit defines whether SDRAM is 16- or 32-bit-wide */ - sdcr |= TMS570_EMIF_SDCR_NM * 1; - /* CL - CAS Latency. */ - sdcr = TMS570_EMIF_SDCR_CL_SET( sdcr, 2 ); - /* CL can only be written if BIT11_9LOCK is simultaneously written with a 1. */ - sdcr |= TMS570_EMIF_SDCR_BIT11_9LOCK * 1; - /* IBANK - Internal SDRAM Bank size. */ - sdcr = TMS570_EMIF_SDCR_IBANK_SET( sdcr, 2 ); /* 4-banks device */ - /* Page Size. This field defines the internal page size of connected SDRAM devices. */ - sdcr = TMS570_EMIF_SDCR_PAGESIZE_SET( sdcr, 0 ); /* elements_256 */ - - TMS570_EMIF.SDCR = sdcr; - - dummy = *(volatile uint32_t*)TMS570_MEMORY_SDRAM_ORIGIN; - (void) dummy; - TMS570_EMIF.SDRCR = 31; - - /* Define the SDRAM refresh period in terms of EMIF_CLK cycles. */ - TMS570_EMIF.SDRCR = 312; -} |