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