board/barco/platinum/spl_picon.c

   1 /*
   2  * Copyright (C) 2014 Stefan Roese <sr@denx.de>
   3  *
   4  * Based on: gw_ventana_spl.c which is:
   5  * Copyright (C) 2014 Gateworks Corporation
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <i2c.h>
  12 #include <asm/io.h>
  13 #include <asm/arch/iomux.h>
  14 #include <asm/arch/mx6-ddr.h>
  15 #include <asm/arch/mx6-pins.h>
  16 #include <asm/arch/sys_proto.h>
  17 #include <asm/imx-common/boot_mode.h>
  18 #include <asm/imx-common/iomux-v3.h>
  19 #include <asm/imx-common/mxc_i2c.h>
  20 #include <spl.h>
  21
  22 #include "platinum.h"
  23
  24 DECLARE_GLOBAL_DATA_PTR;
  25
  26 #undef RTT_NOM_120OHM   /* use 120ohm Rtt_nom vs 60ohm (lower power) */
  27
  28 /* Configure MX6Q/DUAL mmdc DDR io registers */
  29 struct mx6sdl_iomux_ddr_regs mx6sdl_ddr_ioregs = {
  30         /* SDCLK[0:1], CAS, RAS, Reset: Differential input, 40ohm */
  31         .dram_sdclk_0 = 0x00020030,
  32         .dram_sdclk_1 = 0x00020030,
  33         .dram_cas = 0x00020030,
  34         .dram_ras = 0x00020030,
  35         .dram_reset = 0x00020030,
  36         /* SDCKE[0:1]: 100k pull-up */
  37         .dram_sdcke0 = 0x00003000,
  38         .dram_sdcke1 = 0x00003000,
  39         /* SDBA2: pull-up disabled */
  40         .dram_sdba2 = 0x00000000,
  41         /* SDODT[0:1]: 100k pull-up, 40 ohm */
  42         .dram_sdodt0 = 0x00003030,
  43         .dram_sdodt1 = 0x00003030,
  44         /* SDQS[0:7]: Differential input, 40 ohm */
  45         .dram_sdqs0 = 0x00000030,
  46         .dram_sdqs1 = 0x00000030,
  47         .dram_sdqs2 = 0x00000030,
  48         .dram_sdqs3 = 0x00000030,
  49         .dram_sdqs4 = 0x00000030,
  50         .dram_sdqs5 = 0x00000030,
  51         .dram_sdqs6 = 0x00000030,
  52         .dram_sdqs7 = 0x00000030,
  53         /* DQM[0:7]: Differential input, 40 ohm */
  54         .dram_dqm0 = 0x00020030,
  55         .dram_dqm1 = 0x00020030,
  56         .dram_dqm2 = 0x00020030,
  57         .dram_dqm3 = 0x00020030,
  58         .dram_dqm4 = 0x00020030,
  59         .dram_dqm5 = 0x00020030,
  60         .dram_dqm6 = 0x00020030,
  61         .dram_dqm7 = 0x00020030,
  62 };
  63
  64 /* Configure MX6Q/DUAL mmdc GRP io registers */
  65 struct mx6sdl_iomux_grp_regs mx6sdl_grp_ioregs = {
  66         /* DDR3 */
  67         .grp_ddr_type = 0x000c0000,
  68         .grp_ddrmode_ctl = 0x00020000,
  69         /* disable DDR pullups */
  70         .grp_ddrpke = 0x00000000,
  71         /* ADDR[00:16], SDBA[0:1]: 40 ohm */
  72         .grp_addds = 0x00000030,
  73         /* CS0/CS1/SDBA2/CKE0/CKE1/SDWE: 40 ohm */
  74         .grp_ctlds = 0x00000030,
  75         /* DATA[00:63]: Differential input, 40 ohm */
  76         .grp_ddrmode = 0x00020000,
  77         .grp_b0ds = 0x00000030,
  78         .grp_b1ds = 0x00000030,
  79         .grp_b2ds = 0x00000030,
  80         .grp_b3ds = 0x00000030,
  81         .grp_b4ds = 0x00000030,
  82         .grp_b5ds = 0x00000030,
  83         .grp_b6ds = 0x00000030,
  84         .grp_b7ds = 0x00000030,
  85 };
  86
  87 /* MT41K256M16HA-125 */
  88 static struct mx6_ddr3_cfg mt41k256m16ha_125 = {
  89         .mem_speed = 1600,
  90         .density = 4,           /* 4Gbit */
  91         .width = 16,
  92         .banks = 8,
  93         .rowaddr = 15,
  94         .coladdr = 10,
  95         .pagesz = 2,
  96         .trcd = 1375,
  97         .trcmin = 4875,
  98         .trasmin = 3500,
  99 };
 100
 101 /*
 102  * Values from running the Freescale DDR stress tool via USB
 103  */
 104 static struct mx6_mmdc_calibration mx6dq_mmdc_calib = {
 105         /* write leveling calibration determine */
 106         .p0_mpwldectrl0 = 0x0044004E,
 107         .p0_mpwldectrl1 = 0x001F0023,
 108         /* Read DQS Gating calibration */
 109         .p0_mpdgctrl0 = 0x02480248,
 110         .p0_mpdgctrl1 = 0x0210021C,
 111         /* Read Calibration: DQS delay relative to DQ read access */
 112         .p0_mprddlctl = 0x42444444,
 113         /* Write Calibration: DQ/DM delay relative to DQS write access */
 114         .p0_mpwrdlctl = 0x36322C32,
 115 };
 116
 117 static void spl_dram_init(int width)
 118 {
 119         struct mx6_ddr3_cfg *mem = &mt41k256m16ha_125;
 120         struct mx6_ddr_sysinfo sysinfo = {
 121                 /* width of data bus:0=16,1=32,2=64 */
 122                 .dsize = width / 32,
 123                 /* config for full 4GB range so that get_mem_size() works */
 124                 .cs_density = 32, /* 32Gb per CS */
 125                 /* single chip select */
 126                 .ncs = 1,
 127                 .cs1_mirror = 1,
 128                 .rtt_wr = 1 /*DDR3_RTT_60_OHM*/,        /* RTT_Wr = RZQ/4 */
 129 #ifdef RTT_NOM_120OHM
 130                 .rtt_nom = 2 /*DDR3_RTT_120_OHM*/,      /* RTT_Nom = RZQ/2 */
 131 #else
 132                 .rtt_nom = 1 /*DDR3_RTT_60_OHM*/,       /* RTT_Nom = RZQ/4 */
 133 #endif
 134                 .walat = 0,     /* Write additional latency */
 135                 .ralat = 5,     /* Read additional latency */
 136                 .mif3_mode = 3, /* Command prediction working mode */
 137                 .bi_on = 1,     /* Bank interleaving enabled */
 138                 .sde_to_rst = 0x10,     /* 14 cycles, 200us (JEDEC default) */
 139                 .rst_to_cke = 0x23,     /* 33 cycles, 500us (JEDEC default) */
 140         };
 141
 142         mx6sdl_dram_iocfg(width, &mx6sdl_ddr_ioregs, &mx6sdl_grp_ioregs);
 143         mx6_dram_cfg(&sysinfo, &mx6dq_mmdc_calib, mem);
 144 }
 145
 146 /*
 147  * Called from C runtime startup code (arch/arm/lib/crt0.S:_main)
 148  * - we have a stack and a place to store GD, both in SRAM
 149  * - no variable global data is available
 150  */
 151 void board_init_f(ulong dummy)
 152 {
 153         /* Setup AIPS and disable watchdog */
 154         arch_cpu_init();
 155
 156         ccgr_init();
 157         gpr_init();
 158
 159         /* UART iomux */
 160         board_early_init_f();
 161
 162         /* Setup GP timer */
 163         timer_init();
 164
 165         /* UART clocks enabled and gd valid - init serial console */
 166         preloader_console_init();
 167
 168         /* Init DDR with 32bit width */
 169         spl_dram_init(32);
 170
 171         /* Clear the BSS */
 172         memset(__bss_start, 0, __bss_end - __bss_start);
 173
 174         /*
 175          * Setup enet related MUXing early to give the PHY
 176          * some time to wake-up from reset
 177          */
 178         platinum_setup_enet();
 179
 180         /* load/boot image from boot device */
 181         board_init_r(NULL, 0);
 182 }