163 lines
5.4 KiB
C
163 lines
5.4 KiB
C
/****************************************************************************
|
|
* configs/lpcxpresso-lpc54628/src/lpc54_bringup.c
|
|
*
|
|
* Copyright (C) 2017 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* 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.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include "chip/lpc54_pinmux.h"
|
|
#include "lpc54_gpio.h"
|
|
#include "lpc54_emc.h"
|
|
#include "lpcxpresso-lpc54628.h"
|
|
|
|
#include <arch/board/board.h>
|
|
|
|
#if defined(CONFIG_LPC54_EMC) && defined(CONFIG_LPC54_EMC_DYNAMIC)
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#define EMC_CLOCK_PERIOD_NS (1000000000 / BOARD_EMC_FREQUENCY)
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/* EMC basic configuration. */
|
|
|
|
static const struct emc_config_s g_emc_config =
|
|
{
|
|
.bigendian = false, /* Little endian */
|
|
.clksrc = EMC_INTLOOPBACK, /* Internal loop back from EMC_CLK output */
|
|
#ifdef BOARD_220MHz
|
|
.clkdiv = 3, /* EMC Clock = CPU FREQ/3 */
|
|
#else /* if BOARD_180MHz */
|
|
.clkdiv = 2, /* EMC Clock = CPU FREQ/2 */
|
|
#endif
|
|
};
|
|
|
|
/* Pin configuration */
|
|
|
|
static const lpc54_pinset_t g_emc_pinset[] =
|
|
{
|
|
/* Control signals */
|
|
|
|
GPIO_EMC_CASN, GPIO_EMC_RASN, GPIO_EMC_WEN, GPIO_EMC_CLK0,
|
|
GPIO_EMC_CKE0, GPIO_EMC_DYCSN0, GPIO_EMC_DQM0, GPIO_EMC_DQM1,
|
|
|
|
/* Address lines */
|
|
|
|
GPIO_EMC_A0, GPIO_EMC_A1, GPIO_EMC_A2, GPIO_EMC_A3, GPIO_EMC_A4,
|
|
GPIO_EMC_A5, GPIO_EMC_A6, GPIO_EMC_A7, GPIO_EMC_A8, GPIO_EMC_A9,
|
|
GPIO_EMC_A10, GPIO_EMC_A11, GPIO_EMC_A12, GPIO_EMC_A13, GPIO_EMC_A14,
|
|
|
|
/* Data lines */
|
|
|
|
GPIO_EMC_D0, GPIO_EMC_D1, GPIO_EMC_D2, GPIO_EMC_D3, GPIO_EMC_D4,
|
|
GPIO_EMC_D5, GPIO_EMC_D6, GPIO_EMC_D7, GPIO_EMC_D8, GPIO_EMC_D9,
|
|
GPIO_EMC_D10, GPIO_EMC_D11, GPIO_EMC_D12, GPIO_EMC_D13, GPIO_EMC_D14,
|
|
GPIO_EMC_D15
|
|
};
|
|
|
|
#define EMC_NPINS (sizeof(g_emc_pinset) / sizeof(lpc54_pinset_t))
|
|
|
|
/* Dynamic memory timing configuration. */
|
|
|
|
static const struct emc_dynamic_timing_config_s g_emc_dynconfig =
|
|
{
|
|
.rdconfig = EMC_CMDDELAY,
|
|
.refresh = (64 * 1000000 / 4096), /* 4096 rows/ 64ms */
|
|
.rp = 18,
|
|
.ras = 42,
|
|
.srex = 67,
|
|
.apr = 18,
|
|
.wr = EMC_CLOCK_PERIOD_NS + 6, /* one clk + 6ns */
|
|
.dal = EMC_CLOCK_PERIOD_NS + 24,
|
|
.rc = 60,
|
|
.rfc = 60,
|
|
.xsr = 67,
|
|
.rrd = 12,
|
|
.mrd = 2,
|
|
};
|
|
|
|
/* Dynamic memory chip specific configuration: Chip 0 - MTL48LC8M16A2B4-6A */
|
|
|
|
static const struct emc_dynamic_chip_config_s g_emc_dynchipconfig =
|
|
{
|
|
.chndx = 0,
|
|
.dyndev = EMC_SDRAM,
|
|
.rasnclk = 2,
|
|
.mode = 0x23,
|
|
.extmode = 0, /* SDRAM only */
|
|
.addrmap = 0x09, /* 128Mbits (8M*16, 4banks, 12 rows, 9 columns)*/
|
|
};
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: lpc54_sdram_initialize
|
|
*
|
|
* Description:
|
|
* Initialize external SDRAM
|
|
*
|
|
****************************************************************************/
|
|
|
|
void lpc54_sdram_initialize(void)
|
|
{
|
|
int i;
|
|
|
|
/* EMC Basic configuration. */
|
|
|
|
lpc54_emc_initialize(&g_emc_config);
|
|
|
|
/* Configured pins used on the board */
|
|
|
|
for (i = 0; i < EMC_NPINS; i++)
|
|
{
|
|
lpc54_gpio_config(g_emc_pinset[i]);
|
|
}
|
|
|
|
/* EMC Dynamc memory configuration. */
|
|
|
|
lpc54_emc_sdram_initialize(&g_emc_dynconfig, &g_emc_dynchipconfig, 1);
|
|
}
|
|
|
|
#endif /* CONFIG_LPC54_EMC && CONFIG_LPC54_EMC_DYNAMIC */
|