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/*
* Copyright 2008 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* Version 2 as published by the Free Software Foundation.
*/
#include <common.h>
#include <asm/io.h>
#include <asm/fsl_ddr_sdram.h>
#if (CONFIG_CHIP_SELECTS_PER_CTRL > 4)
#error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL
#endif
void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs,
unsigned int ctrl_num, int step)
{
unsigned int i;
volatile ccsr_ddr_t *ddr = (void *)CONFIG_SYS_MPC8xxx_DDR_ADDR;
if (ctrl_num != 0) {
printf("%s unexpected ctrl_num = %u\n", __FUNCTION__, ctrl_num);
return;
}
for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) {
if (i == 0) {
out_be32(&ddr->cs0_bnds, regs->cs[i].bnds);
out_be32(&ddr->cs0_config, regs->cs[i].config);
} else if (i == 1) {
out_be32(&ddr->cs1_bnds, regs->cs[i].bnds);
out_be32(&ddr->cs1_config, regs->cs[i].config);
} else if (i == 2) {
out_be32(&ddr->cs2_bnds, regs->cs[i].bnds);
out_be32(&ddr->cs2_config, regs->cs[i].config);
} else if (i == 3) {
out_be32(&ddr->cs3_bnds, regs->cs[i].bnds);
out_be32(&ddr->cs3_config, regs->cs[i].config);
}
}
out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1);
out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2);
out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode);
out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval);
#if defined(CONFIG_MPC8555) || defined(CONFIG_MPC8541)
out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl);
#endif
/*
* 200 painful micro-seconds must elapse between
* the DDR clock setup and the DDR config enable.
*/
udelay(200);
asm volatile("sync;isync");
out_be32(&ddr->sdram_cfg, regs->ddr_sdram_cfg);
asm("sync;isync;msync");
udelay(500);
}
#if defined(CONFIG_DDR_ECC) && !defined(CONFIG_ECC_INIT_VIA_DDRCONTROLLER)
/*
* Initialize all of memory for ECC, then enable errors.
*/
void
ddr_enable_ecc(unsigned int dram_size)
{
volatile ccsr_ddr_t *ddr= (void *)(CONFIG_SYS_MPC8xxx_DDR_ADDR);
dma_meminit(CONFIG_MEM_INIT_VALUE, dram_size);
/*
* Enable errors for ECC.
*/
debug("DMA DDR: err_disable = 0x%08x\n", ddr->err_disable);
ddr->err_disable = 0x00000000;
asm("sync;isync;msync");
debug("DMA DDR: err_disable = 0x%08x\n", ddr->err_disable);
}
#endif /* CONFIG_DDR_ECC && ! CONFIG_ECC_INIT_VIA_DDRCONTROLLER */
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