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/*
* DDR Configuration for AM33xx devices.
*
* Copyright (C) 2011 Texas Instruments Incorporated -
http://www.ti.com/
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed .as is. WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <asm/arch/cpu.h>
#include <asm/arch/ddr_defs.h>
#include <asm/io.h>
#include <asm/emif.h>
/**
* Base address for EMIF instances
*/
static struct emif_reg_struct *emif_reg = {
(struct emif_reg_struct *)EMIF4_0_CFG_BASE};
/**
* Base address for DDR instance
*/
static struct ddr_regs *ddr_reg[2] = {
(struct ddr_regs *)DDR_PHY_BASE_ADDR,
(struct ddr_regs *)DDR_PHY_BASE_ADDR2};
/**
* Base address for ddr io control instances
*/
static struct ddr_cmdtctrl *ioctrl_reg = {
(struct ddr_cmdtctrl *)DDR_CONTROL_BASE_ADDR};
/**
* As a convention, all functions here return 0 on success
* -1 on failure.
*/
/**
* Configure SDRAM
*/
int config_sdram(struct sdram_config *cfg)
{
writel(cfg->refresh, &emif_reg->emif_sdram_ref_ctrl);
writel(cfg->refresh_sh, &emif_reg->emif_sdram_ref_ctrl_shdw);
writel(cfg->sdrcr, &emif_reg->emif_sdram_config);
return 0;
}
/**
* Set SDRAM timings
*/
int set_sdram_timings(struct sdram_timing *t)
{
writel(t->time1, &emif_reg->emif_sdram_tim_1);
writel(t->time1_sh, &emif_reg->emif_sdram_tim_1_shdw);
writel(t->time2, &emif_reg->emif_sdram_tim_2);
writel(t->time2_sh, &emif_reg->emif_sdram_tim_2_shdw);
writel(t->time3, &emif_reg->emif_sdram_tim_3);
writel(t->time3_sh, &emif_reg->emif_sdram_tim_3_shdw);
return 0;
}
/**
* Configure DDR PHY
*/
int config_ddr_phy(struct ddr_phy_control *p)
{
writel(p->reg, &emif_reg->emif_ddr_phy_ctrl_1);
writel(p->reg_sh, &emif_reg->emif_ddr_phy_ctrl_1_shdw);
return 0;
}
/**
* Configure DDR CMD control registers
*/
int config_cmd_ctrl(const struct cmd_control *cmd)
{
writel(cmd->cmd0csratio, &ddr_reg[0]->cm0csratio);
writel(cmd->cmd0csforce, &ddr_reg[0]->cm0csforce);
writel(cmd->cmd0csdelay, &ddr_reg[0]->cm0csdelay);
writel(cmd->cmd0dldiff, &ddr_reg[0]->cm0dldiff);
writel(cmd->cmd0iclkout, &ddr_reg[0]->cm0iclkout);
writel(cmd->cmd1csratio, &ddr_reg[0]->cm1csratio);
writel(cmd->cmd1csforce, &ddr_reg[0]->cm1csforce);
writel(cmd->cmd1csdelay, &ddr_reg[0]->cm1csdelay);
writel(cmd->cmd1dldiff, &ddr_reg[0]->cm1dldiff);
writel(cmd->cmd1iclkout, &ddr_reg[0]->cm1iclkout);
writel(cmd->cmd2csratio, &ddr_reg[0]->cm2csratio);
writel(cmd->cmd2csforce, &ddr_reg[0]->cm2csforce);
writel(cmd->cmd2csdelay, &ddr_reg[0]->cm2csdelay);
writel(cmd->cmd2dldiff, &ddr_reg[0]->cm2dldiff);
writel(cmd->cmd2iclkout, &ddr_reg[0]->cm2iclkout);
return 0;
}
/**
* Configure DDR DATA registers
*/
int config_ddr_data(int macrono, const struct ddr_data *data)
{
writel(data->datardsratio0, &ddr_reg[macrono]->dt0rdsratio0);
writel(data->datardsratio1, &ddr_reg[macrono]->dt0rdsratio1);
writel(data->datawdsratio0, &ddr_reg[macrono]->dt0wdsratio0);
writel(data->datawdsratio1, &ddr_reg[macrono]->dt0wdsratio1);
writel(data->datawiratio0, &ddr_reg[macrono]->dt0wiratio0);
writel(data->datawiratio1, &ddr_reg[macrono]->dt0wiratio1);
writel(data->datagiratio0, &ddr_reg[macrono]->dt0giratio0);
writel(data->datagiratio1, &ddr_reg[macrono]->dt0giratio1);
writel(data->datafwsratio0, &ddr_reg[macrono]->dt0fwsratio0);
writel(data->datafwsratio1, &ddr_reg[macrono]->dt0fwsratio1);
writel(data->datawrsratio0, &ddr_reg[macrono]->dt0wrsratio0);
writel(data->datawrsratio1, &ddr_reg[macrono]->dt0wrsratio1);
writel(data->datadldiff0, &ddr_reg[macrono]->dt0dldiff0);
return 0;
}
int config_io_ctrl(struct ddr_ioctrl *ioctrl)
{
writel(ioctrl->cmd1ctl, &ioctrl_reg->cm0ioctl);
writel(ioctrl->cmd2ctl, &ioctrl_reg->cm1ioctl);
writel(ioctrl->cmd3ctl, &ioctrl_reg->cm2ioctl);
writel(ioctrl->data1ctl, &ioctrl_reg->dt0ioctl);
writel(ioctrl->data2ctl, &ioctrl_reg->dt1ioctl);
return 0;
}
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