src/mainboard/ti/beaglebone/romstage.c

/* SPDX-License-Identifier: GPL-2.0-only */

#include <program_loading.h>
#include <console/console.h>
#include <cbmem.h>
#include <romstage_common.h>

#include <soc/ti/am335x/sdram.h>
#include "ddr3.h"

const struct ctrl_ioregs ioregs_bonelt = {
	.cm0ioctl = MT41K256M16HA125E_IOCTRL_VALUE,
	.cm1ioctl = MT41K256M16HA125E_IOCTRL_VALUE,
	.cm2ioctl = MT41K256M16HA125E_IOCTRL_VALUE,
	.dt0ioctl = MT41K256M16HA125E_IOCTRL_VALUE,
	.dt1ioctl = MT41K256M16HA125E_IOCTRL_VALUE,
};

static const struct ddr_data ddr3_beagleblack_data = {
	.datardsratio0 = MT41K256M16HA125E_RD_DQS,
	.datawdsratio0 = MT41K256M16HA125E_WR_DQS,
	.datafwsratio0 = MT41K256M16HA125E_PHY_FIFO_WE,
	.datawrsratio0 = MT41K256M16HA125E_PHY_WR_DATA,
};

static const struct cmd_control ddr3_beagleblack_cmd_ctrl_data = {
	.cmd0csratio = MT41K256M16HA125E_RATIO,
	.cmd0iclkout = MT41K256M16HA125E_INVERT_CLKOUT,

	.cmd1csratio = MT41K256M16HA125E_RATIO,
	.cmd1iclkout = MT41K256M16HA125E_INVERT_CLKOUT,

	.cmd2csratio = MT41K256M16HA125E_RATIO,
	.cmd2iclkout = MT41K256M16HA125E_INVERT_CLKOUT,
};

static struct emif_regs ddr3_beagleblack_emif_reg_data = {
	.sdram_config = MT41K256M16HA125E_EMIF_SDCFG,
	.ref_ctrl = MT41K256M16HA125E_EMIF_SDREF,
	.sdram_tim1 = MT41K256M16HA125E_EMIF_TIM1,
	.sdram_tim2 = MT41K256M16HA125E_EMIF_TIM2,
	.sdram_tim3 = MT41K256M16HA125E_EMIF_TIM3,
	.ocp_config = EMIF_OCP_CONFIG_BEAGLEBONE_BLACK,
	.zq_config = MT41K256M16HA125E_ZQ_CFG,
	.emif_ddr_phy_ctlr_1 = MT41K256M16HA125E_EMIF_READ_LATENCY,
};

#if CONFIG(SEPARATE_ROMSTAGE)
void main(void)
{
	console_init();
	printk(BIOS_INFO, "Hello from romstage.\n");
	romstage_main();
}
#endif

void __noreturn romstage_main(void)
{
	config_ddr(400, &ioregs_bonelt, &ddr3_beagleblack_data, &ddr3_beagleblack_cmd_ctrl_data,
		   &ddr3_beagleblack_emif_reg_data, 0);

	cbmem_initialize_empty();

	run_ramstage();
}