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/*
* Copyright (C) 2015, Bachmann electronic GmbH
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <spl.h>
#include <asm/arch/mx6-ddr.h>
/* Configure MX6Q/DUAL mmdc DDR io registers */
static struct mx6dq_iomux_ddr_regs ot1200_ddr_ioregs = {
/* SDCLK[0:1], CAS, RAS, Reset: Differential input, 48ohm */
.dram_sdclk_0 = 0x00000028,
.dram_sdclk_1 = 0x00000028,
.dram_cas = 0x00000028,
.dram_ras = 0x00000028,
.dram_reset = 0x00000028,
/* SDCKE[0:1]: 100k pull-up */
.dram_sdcke0 = 0x00003000,
.dram_sdcke1 = 0x00003000,
/* SDBA2: pull-up disabled */
.dram_sdba2 = 0x00000000,
/* SDODT[0:1]: 100k pull-up, 48 ohm */
.dram_sdodt0 = 0x00000028,
.dram_sdodt1 = 0x00000028,
/* SDQS[0:7]: Differential input, 48 ohm */
.dram_sdqs0 = 0x00000028,
.dram_sdqs1 = 0x00000028,
.dram_sdqs2 = 0x00000028,
.dram_sdqs3 = 0x00000028,
.dram_sdqs4 = 0x00000028,
.dram_sdqs5 = 0x00000028,
.dram_sdqs6 = 0x00000028,
.dram_sdqs7 = 0x00000028,
/* DQM[0:7]: Differential input, 48 ohm */
.dram_dqm0 = 0x00000028,
.dram_dqm1 = 0x00000028,
.dram_dqm2 = 0x00000028,
.dram_dqm3 = 0x00000028,
.dram_dqm4 = 0x00000028,
.dram_dqm5 = 0x00000028,
.dram_dqm6 = 0x00000028,
.dram_dqm7 = 0x00000028,
};
/* Configure MX6Q/DUAL mmdc GRP io registers */
static struct mx6dq_iomux_grp_regs ot1200_grp_ioregs = {
/* DDR3 */
.grp_ddr_type = 0x000c0000,
.grp_ddrmode_ctl = 0x00020000,
/* Disable DDR pullups */
.grp_ddrpke = 0x00000000,
/* ADDR[00:16], SDBA[0:1]: 48 ohm */
.grp_addds = 0x00000028,
/* CS0/CS1/SDBA2/CKE0/CKE1/SDWE: 48 ohm */
.grp_ctlds = 0x00000028,
/* DATA[00:63]: Differential input, 48 ohm */
.grp_ddrmode = 0x00020000,
.grp_b0ds = 0x00000028,
.grp_b1ds = 0x00000028,
.grp_b2ds = 0x00000028,
.grp_b3ds = 0x00000028,
.grp_b4ds = 0x00000028,
.grp_b5ds = 0x00000028,
.grp_b6ds = 0x00000028,
.grp_b7ds = 0x00000028,
};
static struct mx6_ddr_sysinfo ot1200_ddr_sysinfo = {
/* Width of data bus: 0=16, 1=32, 2=64 */
.dsize = 2,
/* config for full 4GB range so that get_mem_size() works */
.cs_density = 32, /* 32Gb per CS */
/* Single chip select */
.ncs = 1,
.cs1_mirror = 0, /* war 0 */
.rtt_wr = 1, /* DDR3_RTT_60_OHM - RTT_Wr = RZQ/4 */
.rtt_nom = 1, /* DDR3_RTT_60_OHM - RTT_Nom = RZQ/4 */
.walat = 1, /* Write additional latency */
.ralat = 5, /* Read additional latency */
.mif3_mode = 3, /* Command prediction working mode */
.bi_on = 1, /* Bank interleaving enabled */ /* war 1 */
.sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */
.rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */
.refsel = 1, /* Refresh cycles at 32KHz */
.refr = 7, /* 8 refresh commands per refresh cycle */
};
/* MT41K128M16JT-125 */
static struct mx6_ddr3_cfg micron_2gib_1600 = {
.mem_speed = 1600,
.density = 2,
.width = 16,
.banks = 8,
.rowaddr = 14,
.coladdr = 10,
.pagesz = 2,
.trcd = 1375,
.trcmin = 4875,
.trasmin = 3500,
.SRT = 1,
};
static struct mx6_mmdc_calibration micron_2gib_1600_mmdc_calib = {
/* write leveling calibration determine */
.p0_mpwldectrl0 = 0x00260025,
.p0_mpwldectrl1 = 0x00270021,
.p1_mpwldectrl0 = 0x00180034,
.p1_mpwldectrl1 = 0x00180024,
/* Read DQS Gating calibration */
.p0_mpdgctrl0 = 0x04380344,
.p0_mpdgctrl1 = 0x0330032C,
.p1_mpdgctrl0 = 0x0338033C,
.p1_mpdgctrl1 = 0x032C0300,
/* Read Calibration: DQS delay relative to DQ read access */
.p0_mprddlctl = 0x3C2E3238,
.p1_mprddlctl = 0x3A2E303C,
/* Write Calibration: DQ/DM delay relative to DQS write access */
.p0_mpwrdlctl = 0x36384036,
.p1_mpwrdlctl = 0x442E4438,
};
static void ot1200_spl_dram_init(void)
{
mx6dq_dram_iocfg(64, &ot1200_ddr_ioregs, &ot1200_grp_ioregs);
mx6_dram_cfg(&ot1200_ddr_sysinfo, µn_2gib_1600_mmdc_calib,
µn_2gib_1600);
}
/*
* called from C runtime startup code (arch/arm/lib/crt0.S:_main)
* - we have a stack and a place to store GD, both in SRAM
* - no variable global data is available
*/
void board_init_f(ulong dummy)
{
/* setup AIPS and disable watchdog */
arch_cpu_init();
/* iomux and setup of i2c */
board_early_init_f();
/* setup GP timer */
timer_init();
/* UART clocks enabled and gd valid - init serial console */
preloader_console_init();
/* configure MMDC for SDRAM width/size and per-model calibration */
ot1200_spl_dram_init();
}
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