u-boot/board/gdsys/mpc8308/sdram.c
Mario Six edba2b29f5 gdsys: mpc8308: Don't use manual RAM config if RAM driver is active
The "manual" RAM configuration should not be used if the DM RAM driver
is active, hence, disable the code if the CONFIG_MPC83XX_SDRAM config
variable is defined.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
2019-05-21 08:03:38 +02:00

87 lines
2.4 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2007 Freescale Semiconductor, Inc.
* Copyright (C) 2010 Ilya Yanok, Emcraft Systems, yanok@emcraft.com
*
* Authors: Nick.Spence@freescale.com
* Wilson.Lo@freescale.com
* scottwood@freescale.com
*
* This files is mostly identical to the original from
* board\freescale\mpc8315erdb\sdram.c
*/
#ifndef CONFIG_MPC83XX_SDRAM
#include <common.h>
#include <mpc83xx.h>
#include <spd_sdram.h>
#include <asm/bitops.h>
#include <asm/io.h>
#include <asm/processor.h>
DECLARE_GLOBAL_DATA_PTR;
/* Fixed sdram init -- doesn't use serial presence detect.
*
* This is useful for faster booting in configs where the RAM is unlikely
* to be changed, or for things like NAND booting where space is tight.
*/
static long fixed_sdram(void)
{
immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
u32 msize = CONFIG_SYS_DDR_SIZE * 1024 * 1024;
u32 msize_log2 = __ilog2(msize);
out_be32(&im->sysconf.ddrlaw[0].bar,
CONFIG_SYS_SDRAM_BASE & 0xfffff000);
out_be32(&im->sysconf.ddrlaw[0].ar, LBLAWAR_EN | (msize_log2 - 1));
out_be32(&im->sysconf.ddrcdr, CONFIG_SYS_DDRCDR_VALUE);
out_be32(&im->ddr.csbnds[0].csbnds, (msize - 1) >> 24);
out_be32(&im->ddr.cs_config[0], CONFIG_SYS_DDR_CS0_CONFIG);
/* Currently we use only one CS, so disable the other bank. */
out_be32(&im->ddr.cs_config[1], 0);
out_be32(&im->ddr.sdram_clk_cntl, CONFIG_SYS_DDR_SDRAM_CLK_CNTL);
out_be32(&im->ddr.timing_cfg_3, CONFIG_SYS_DDR_TIMING_3);
out_be32(&im->ddr.timing_cfg_1, CONFIG_SYS_DDR_TIMING_1);
out_be32(&im->ddr.timing_cfg_2, CONFIG_SYS_DDR_TIMING_2);
out_be32(&im->ddr.timing_cfg_0, CONFIG_SYS_DDR_TIMING_0);
out_be32(&im->ddr.sdram_cfg, CONFIG_SYS_DDR_SDRAM_CFG);
out_be32(&im->ddr.sdram_cfg2, CONFIG_SYS_DDR_SDRAM_CFG2);
out_be32(&im->ddr.sdram_mode, CONFIG_SYS_DDR_MODE);
out_be32(&im->ddr.sdram_mode2, CONFIG_SYS_DDR_MODE2);
out_be32(&im->ddr.sdram_interval, CONFIG_SYS_DDR_INTERVAL);
sync();
/* enable DDR controller */
setbits_be32(&im->ddr.sdram_cfg, SDRAM_CFG_MEM_EN);
sync();
return get_ram_size(CONFIG_SYS_SDRAM_BASE, msize);
}
int dram_init(void)
{
immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
u32 msize;
if ((in_be32(&im->sysconf.immrbar) & IMMRBAR_BASE_ADDR) != (u32)im)
return -ENXIO;
/* DDR SDRAM */
msize = fixed_sdram();
/* return total bus SDRAM size(bytes) -- DDR */
gd->ram_size = msize;
return 0;
}
#endif /* !CONFIG_MPC83XX_SDRAM */