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/*
* Copyright (C) 2014 Stefan Roese <sr@denx.de>
*
* Based on: gw_ventana_spl.c which is:
* Copyright (C) 2014 Gateworks Corporation
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#include <asm/io.h>
#include <asm/arch/iomux.h>
#include <asm/arch/mx6-ddr.h>
#include <asm/arch/mx6-pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/imx-common/boot_mode.h>
#include <asm/imx-common/iomux-v3.h>
#include <asm/imx-common/mxc_i2c.h>
#include <spl.h>
#include "platinum.h"
DECLARE_GLOBAL_DATA_PTR;
#undef RTT_NOM_120OHM /* use 120ohm Rtt_nom vs 60ohm (lower power) */
/* Configure MX6Q/DUAL mmdc DDR io registers */
struct mx6sdl_iomux_ddr_regs mx6sdl_ddr_ioregs = {
/* SDCLK[0:1], CAS, RAS, Reset: Differential input, 40ohm */
.dram_sdclk_0 = 0x00020030,
.dram_sdclk_1 = 0x00020030,
.dram_cas = 0x00020030,
.dram_ras = 0x00020030,
.dram_reset = 0x00020030,
/* 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, 40 ohm */
.dram_sdodt0 = 0x00003030,
.dram_sdodt1 = 0x00003030,
/* SDQS[0:7]: Differential input, 40 ohm */
.dram_sdqs0 = 0x00000030,
.dram_sdqs1 = 0x00000030,
.dram_sdqs2 = 0x00000030,
.dram_sdqs3 = 0x00000030,
.dram_sdqs4 = 0x00000030,
.dram_sdqs5 = 0x00000030,
.dram_sdqs6 = 0x00000030,
.dram_sdqs7 = 0x00000030,
/* DQM[0:7]: Differential input, 40 ohm */
.dram_dqm0 = 0x00020030,
.dram_dqm1 = 0x00020030,
.dram_dqm2 = 0x00020030,
.dram_dqm3 = 0x00020030,
.dram_dqm4 = 0x00020030,
.dram_dqm5 = 0x00020030,
.dram_dqm6 = 0x00020030,
.dram_dqm7 = 0x00020030,
};
/* Configure MX6Q/DUAL mmdc GRP io registers */
struct mx6sdl_iomux_grp_regs mx6sdl_grp_ioregs = {
/* DDR3 */
.grp_ddr_type = 0x000c0000,
.grp_ddrmode_ctl = 0x00020000,
/* disable DDR pullups */
.grp_ddrpke = 0x00000000,
/* ADDR[00:16], SDBA[0:1]: 40 ohm */
.grp_addds = 0x00000030,
/* CS0/CS1/SDBA2/CKE0/CKE1/SDWE: 40 ohm */
.grp_ctlds = 0x00000030,
/* DATA[00:63]: Differential input, 40 ohm */
.grp_ddrmode = 0x00020000,
.grp_b0ds = 0x00000030,
.grp_b1ds = 0x00000030,
.grp_b2ds = 0x00000030,
.grp_b3ds = 0x00000030,
.grp_b4ds = 0x00000030,
.grp_b5ds = 0x00000030,
.grp_b6ds = 0x00000030,
.grp_b7ds = 0x00000030,
};
/* MT41K256M16HA-125 */
static struct mx6_ddr3_cfg mt41k256m16ha_125 = {
.mem_speed = 1600,
.density = 4, /* 4Gbit */
.width = 16,
.banks = 8,
.rowaddr = 15,
.coladdr = 10,
.pagesz = 2,
.trcd = 1375,
.trcmin = 4875,
.trasmin = 3500,
};
/*
* Values from running the Freescale DDR stress tool via USB
*/
static struct mx6_mmdc_calibration mx6dq_mmdc_calib = {
/* write leveling calibration determine */
.p0_mpwldectrl0 = 0x0044004E,
.p0_mpwldectrl1 = 0x001F0023,
/* Read DQS Gating calibration */
.p0_mpdgctrl0 = 0x02480248,
.p0_mpdgctrl1 = 0x0210021C,
/* Read Calibration: DQS delay relative to DQ read access */
.p0_mprddlctl = 0x42444444,
/* Write Calibration: DQ/DM delay relative to DQS write access */
.p0_mpwrdlctl = 0x36322C32,
};
static void spl_dram_init(int width)
{
struct mx6_ddr3_cfg *mem = &mt41k256m16ha_125;
struct mx6_ddr_sysinfo sysinfo = {
/* width of data bus:0=16,1=32,2=64 */
.dsize = width / 32,
/* config for full 4GB range so that get_mem_size() works */
.cs_density = 32, /* 32Gb per CS */
/* single chip select */
.ncs = 1,
.cs1_mirror = 1,
.rtt_wr = 1 /*DDR3_RTT_60_OHM*/, /* RTT_Wr = RZQ/4 */
#ifdef RTT_NOM_120OHM
.rtt_nom = 2 /*DDR3_RTT_120_OHM*/, /* RTT_Nom = RZQ/2 */
#else
.rtt_nom = 1 /*DDR3_RTT_60_OHM*/, /* RTT_Nom = RZQ/4 */
#endif
.walat = 0, /* Write additional latency */
.ralat = 5, /* Read additional latency */
.mif3_mode = 3, /* Command prediction working mode */
.bi_on = 1, /* Bank interleaving enabled */
.sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */
.rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */
.ddr_type = DDR_TYPE_DDR3,
};
mx6sdl_dram_iocfg(width, &mx6sdl_ddr_ioregs, &mx6sdl_grp_ioregs);
mx6_dram_cfg(&sysinfo, &mx6dq_mmdc_calib, mem);
}
/*
* 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();
ccgr_init();
gpr_init();
/* UART iomux */
board_early_init_f();
/* Setup GP timer */
timer_init();
/* UART clocks enabled and gd valid - init serial console */
preloader_console_init();
/* Init DDR with 32bit width */
spl_dram_init(32);
/* Clear the BSS */
memset(__bss_start, 0, __bss_end - __bss_start);
/*
* Setup enet related MUXing early to give the PHY
* some time to wake-up from reset
*/
platinum_setup_enet();
/* load/boot image from boot device */
board_init_r(NULL, 0);
}
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