// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2014 Gateworks Corporation
 * Author: Tim Harvey <tharvey@gateworks.com>
 */

#include <common.h>
#include <asm/io.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/mx6-ddr.h>
#include <asm/arch/mx6-pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/mach-imx/boot_mode.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/mach-imx/mxc_i2c.h>
#include <environment.h>
#include <i2c.h>
#include <spl.h>

#include "gsc.h"
#include "common.h"

#define RTT_NOM_120OHM /* use 120ohm Rtt_nom vs 60ohm (lower power) */
#define GSC_EEPROM_DDR_SIZE     0x2B    /* enum (512,1024,2048) MB */
#define GSC_EEPROM_DDR_WIDTH    0x2D    /* enum (32,64) bit */

/* configure MX6Q/DUAL mmdc DDR io registers */
struct mx6dq_iomux_ddr_regs mx6dq_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 mx6dq_iomux_grp_regs mx6dq_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,
};

/* configure MX6SOLO/DUALLITE 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 MX6SOLO/DUALLITE mmdc GRP io registers */
struct mx6sdl_iomux_grp_regs mx6sdl_grp_ioregs = {
        /* DDR3 */
        .grp_ddr_type = 0x000c0000,
        /* SDQS[0:7]: Differential input, 40 ohm */
        .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,
};

/* MT41K64M16JT-125 (1Gb density) */
static struct mx6_ddr3_cfg mt41k64m16jt_125 = {
        .mem_speed = 1600,
        .density = 1,
        .width = 16,
        .banks = 8,
        .rowaddr = 13,
        .coladdr = 10,
        .pagesz = 2,
        .trcd = 1375,
        .trcmin = 4875,
        .trasmin = 3500,
};

/* MT41K128M16JT-125 (2Gb density) */
static struct mx6_ddr3_cfg mt41k128m16jt_125 = {
        .mem_speed = 1600,
        .density = 2,
        .width = 16,
        .banks = 8,
        .rowaddr = 14,
        .coladdr = 10,
        .pagesz = 2,
        .trcd = 1375,
        .trcmin = 4875,
        .trasmin = 3500,
};

/* MT41K256M16HA-125 (4Gb density) */
static struct mx6_ddr3_cfg mt41k256m16ha_125 = {
        .mem_speed = 1600,
        .density = 4,
        .width = 16,
        .banks = 8,
        .rowaddr = 15,
        .coladdr = 10,
        .pagesz = 2,
        .trcd = 1375,
        .trcmin = 4875,
        .trasmin = 3500,
};

/* MT41K512M16HA-125 (8Gb density) */
static struct mx6_ddr3_cfg mt41k512m16ha_125 = {
        .mem_speed = 1600,
        .density = 8,
        .width = 16,
        .banks = 8,
        .rowaddr = 16,
        .coladdr = 10,
        .pagesz = 2,
        .trcd = 1375,
        .trcmin = 4875,
        .trasmin = 3500,
};

/*
 * calibration - these are the various CPU/DDR3 combinations we support
 */
static struct mx6_mmdc_calibration mx6sdl_64x16_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x004C004E,
        .p0_mpwldectrl1 = 0x00440044,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x42440247,
        .p0_mpdgctrl1 = 0x02310232,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0x45424746,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0x33382C31,
};

static struct mx6_mmdc_calibration mx6dq_256x16_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x001B0016,
        .p0_mpwldectrl1 = 0x000C000E,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x4324033A,
        .p0_mpdgctrl1 = 0x00000000,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0x40403438,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0x40403D36,
};

static struct mx6_mmdc_calibration mx6sdl_256x16_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x00420043,
        .p0_mpwldectrl1 = 0x0016001A,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x4238023B,
        .p0_mpdgctrl1 = 0x00000000,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0x40404849,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0x40402E2F,
};

static struct mx6_mmdc_calibration mx6dq_128x32_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x00190017,
        .p0_mpwldectrl1 = 0x00140026,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x43380347,
        .p0_mpdgctrl1 = 0x433C034D,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0x3C313539,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0x36393C39,
};

static struct mx6_mmdc_calibration mx6sdl_128x32_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x003C003C,
        .p0_mpwldectrl1 = 0x001F002A,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x42410244,
        .p0_mpdgctrl1 = 0x4234023A,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0x484A4C4B,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0x33342B32,
};

static struct mx6_mmdc_calibration mx6dq_128x64_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x00190017,
        .p0_mpwldectrl1 = 0x00140026,
        .p1_mpwldectrl0 = 0x0021001C,
        .p1_mpwldectrl1 = 0x0011001D,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x43380347,
        .p0_mpdgctrl1 = 0x433C034D,
        .p1_mpdgctrl0 = 0x032C0324,
        .p1_mpdgctrl1 = 0x03310232,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0x3C313539,
        .p1_mprddlctl = 0x37343141,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0x36393C39,
        .p1_mpwrdlctl = 0x42344438,
};

static struct mx6_mmdc_calibration mx6sdl_128x64_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x003C003C,
        .p0_mpwldectrl1 = 0x001F002A,
        .p1_mpwldectrl0 = 0x00330038,
        .p1_mpwldectrl1 = 0x0022003F,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x42410244,
        .p0_mpdgctrl1 = 0x4234023A,
        .p1_mpdgctrl0 = 0x022D022D,
        .p1_mpdgctrl1 = 0x021C0228,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0x484A4C4B,
        .p1_mprddlctl = 0x4B4D4E4B,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0x33342B32,
        .p1_mpwrdlctl = 0x3933332B,
};

static struct mx6_mmdc_calibration mx6dq_256x32_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x001E001A,
        .p0_mpwldectrl1 = 0x0026001F,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x43370349,
        .p0_mpdgctrl1 = 0x032D0327,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0x3D303639,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0x32363934,
};

static struct mx6_mmdc_calibration mx6sdl_256x32_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0X00480047,
        .p0_mpwldectrl1 = 0X003D003F,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0X423E0241,
        .p0_mpdgctrl1 = 0X022B022C,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0X49454A4A,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0X2E372C32,
};

static struct mx6_mmdc_calibration mx6dq_256x64_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0X00220021,
        .p0_mpwldectrl1 = 0X00200030,
        .p1_mpwldectrl0 = 0X002D0027,
        .p1_mpwldectrl1 = 0X00150026,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x43330342,
        .p0_mpdgctrl1 = 0x0339034A,
        .p1_mpdgctrl0 = 0x032F0325,
        .p1_mpdgctrl1 = 0x032F022E,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0X3A2E3437,
        .p1_mprddlctl = 0X35312F3F,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0X33363B37,
        .p1_mpwrdlctl = 0X40304239,
};

static struct mx6_mmdc_calibration mx6sdl_256x64_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x0048004A,
        .p0_mpwldectrl1 = 0x003F004A,
        .p1_mpwldectrl0 = 0x001E0028,
        .p1_mpwldectrl1 = 0x002C0043,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x02250219,
        .p0_mpdgctrl1 = 0x01790202,
        .p1_mpdgctrl0 = 0x02080208,
        .p1_mpdgctrl1 = 0x016C0175,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0x4A4C4D4C,
        .p1_mprddlctl = 0x494C4A48,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0x403F3437,
        .p1_mpwrdlctl = 0x383A3930,
};

static struct mx6_mmdc_calibration mx6sdl_256x64x2_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x001F003F,
        .p0_mpwldectrl1 = 0x001F001F,
        .p1_mpwldectrl0 = 0x001F004E,
        .p1_mpwldectrl1 = 0x0059001F,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0   = 0x42220225,
        .p0_mpdgctrl1   = 0x0213021F,
        .p1_mpdgctrl0   = 0x022C0242,
        .p1_mpdgctrl1   = 0x022C0244,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl   = 0x474A4C4A,
        .p1_mprddlctl   = 0x48494C45,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl   = 0x3F3F3F36,
        .p1_mpwrdlctl   = 0x3F36363F,
};

static struct mx6_mmdc_calibration mx6dq_512x32_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x002A0025,
        .p0_mpwldectrl1 = 0x003A002A,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x43430356,
        .p0_mpdgctrl1 = 0x033C0335,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0x4B373F42,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0x303E3C36,
};

static struct mx6_mmdc_calibration mx6dq_512x64_mmdc_calib = {
        /* write leveling calibration determine */
        .p0_mpwldectrl0 = 0x00230020,
        .p0_mpwldectrl1 = 0x002F002A,
        .p1_mpwldectrl0 = 0x001D0027,
        .p1_mpwldectrl1 = 0x00100023,
        /* Read DQS Gating calibration */
        .p0_mpdgctrl0 = 0x03250339,
        .p0_mpdgctrl1 = 0x031C0316,
        .p1_mpdgctrl0 = 0x03210331,
        .p1_mpdgctrl1 = 0x031C025A,
        /* Read Calibration: DQS delay relative to DQ read access */
        .p0_mprddlctl = 0x40373C40,
        .p1_mprddlctl = 0x3A373646,
        /* Write Calibration: DQ/DM delay relative to DQS write access */
        .p0_mpwrdlctl = 0x2E353933,
        .p1_mpwrdlctl = 0x3C2F3F35,
};

static void spl_dram_init(int width, int size_mb, int board_model)
{
        struct mx6_ddr3_cfg *mem = NULL;
        struct mx6_mmdc_calibration *calib = NULL;
        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 = 0,
                .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 = 1,     /* 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) */
                .pd_fast_exit = 1, /* enable precharge power-down fast exit */
                .ddr_type = DDR_TYPE_DDR3,
                .refsel = 1,    /* Refresh cycles at 32KHz */
                .refr = 7,      /* 8 refresh commands per refresh cycle */
        };

        /*
         * MMDC Calibration requires the following data:
         *   mx6_mmdc_calibration - board-specific calibration (routing delays)
         *      these calibration values depend on board routing, SoC, and DDR
         *   mx6_ddr_sysinfo - board-specific memory architecture (width/cs/etc)
         *   mx6_ddr_cfg - chip specific timing/layout details
         */
        if (width == 16 && size_mb == 128) {
                mem = &mt41k64m16jt_125;
                if (is_cpu_type(MXC_CPU_MX6Q))
                        ;
                else
                        calib = &mx6sdl_64x16_mmdc_calib;
                debug("1gB density\n");
        } else if (width == 16 && size_mb == 256) {
                /* 1x 2Gb density chip - same calib as 2x 2Gb */
                mem = &mt41k128m16jt_125;
                if (is_cpu_type(MXC_CPU_MX6Q))
                        calib = &mx6dq_128x32_mmdc_calib;
                else
                        calib = &mx6sdl_128x32_mmdc_calib;
                debug("2gB density\n");
        } else if (width == 16 && size_mb == 512) {
                mem = &mt41k256m16ha_125;
                if (is_cpu_type(MXC_CPU_MX6Q))
                        calib = &mx6dq_256x16_mmdc_calib;
                else
                        calib = &mx6sdl_256x16_mmdc_calib;
                debug("4gB density\n");
        } else if (width == 32 && size_mb == 256) {
                /* Same calib as width==16, size==128 */
                mem = &mt41k64m16jt_125;
                if (is_cpu_type(MXC_CPU_MX6Q))
                        ;
                else
                        calib = &mx6sdl_64x16_mmdc_calib;
                debug("1gB density\n");
        } else if (width == 32 && size_mb == 512) {
                mem = &mt41k128m16jt_125;
                if (is_cpu_type(MXC_CPU_MX6Q))
                        calib = &mx6dq_128x32_mmdc_calib;
                else
                        calib = &mx6sdl_128x32_mmdc_calib;
                debug("2gB density\n");
        }  else if (width == 32 && size_mb == 1024) {
                mem = &mt41k256m16ha_125;
                if (is_cpu_type(MXC_CPU_MX6Q))
                        calib = &mx6dq_256x32_mmdc_calib;
                else
                        calib = &mx6sdl_256x32_mmdc_calib;
                debug("4gB density\n");
        } else if (width == 32 && size_mb == 2048) {
                mem = &mt41k512m16ha_125;
                if (is_cpu_type(MXC_CPU_MX6Q))
                        calib = &mx6dq_512x32_mmdc_calib;
                debug("8gB density\n");
        } else if (width == 64 && size_mb == 512) {
                mem = &mt41k64m16jt_125;
                debug("1gB density\n");
        } else if (width == 64 && size_mb == 1024) {
                mem = &mt41k128m16jt_125;
                if (is_cpu_type(MXC_CPU_MX6Q))
                        calib = &mx6dq_128x64_mmdc_calib;
                else
                        calib = &mx6sdl_128x64_mmdc_calib;
                debug("2gB density\n");
        } else if (width == 64 && size_mb == 2048) {
                mem = &mt41k256m16ha_125;
                if (is_cpu_type(MXC_CPU_MX6Q))
                        calib = &mx6dq_256x64_mmdc_calib;
                else
                        calib = &mx6sdl_256x64_mmdc_calib;
                debug("4gB density\n");
        } else if (width == 64 && size_mb == 4096) {
                switch(board_model) {
                case GW5903:
                        /* 8xMT41K256M16 (4GiB) fly-by mirrored 2-chipsels */
                        mem = &mt41k256m16ha_125;
                        debug("4gB density\n");
                        if (!is_cpu_type(MXC_CPU_MX6Q)) {
                                calib = &mx6sdl_256x64x2_mmdc_calib;
                                sysinfo.ncs = 2;
                                sysinfo.cs_density = 18; /* CS0_END=71 */
                                sysinfo.cs1_mirror = 1; /* mirror enabled */
                        }
                        break;
                default:
                        mem = &mt41k512m16ha_125;
                        if (is_cpu_type(MXC_CPU_MX6Q))
                                calib = &mx6dq_512x64_mmdc_calib;
                        debug("8gB density\n");
                        break;
                }
        }

        if (!(mem && calib)) {
                puts("Error: Invalid Calibration/Board Configuration\n");
                printf("MEM    : %s\n", mem ? "OKAY" : "NULL");
                printf("CALIB  : %s\n", calib ? "OKAY" : "NULL");
                printf("CPUTYPE: %s\n",
                       is_cpu_type(MXC_CPU_MX6Q) ? "IMX6Q" : "IMX6DL");
                printf("SIZE_MB: %d\n", size_mb);
                printf("WIDTH  : %d\n", width);
                hang();
        }

        if (is_cpu_type(MXC_CPU_MX6Q))
                mx6dq_dram_iocfg(width, &mx6dq_ddr_ioregs,
                                 &mx6dq_grp_ioregs);
        else
                mx6sdl_dram_iocfg(width, &mx6sdl_ddr_ioregs,
                                  &mx6sdl_grp_ioregs);
        mx6_dram_cfg(&sysinfo, calib, mem);
}

static void ccgr_init(void)
{
        struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;

        writel(0x00C03F3F, &ccm->CCGR0);
        writel(0x0030FC03, &ccm->CCGR1);
        writel(0x0FFFC000, &ccm->CCGR2);
        writel(0x3FF00000, &ccm->CCGR3);
        writel(0xFFFFF300, &ccm->CCGR4);        /* enable NAND/GPMI/BCH clks */
        writel(0x0F0000C3, &ccm->CCGR5);
        writel(0x000003FF, &ccm->CCGR6);
}

/*
 * 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)
{
        struct ventana_board_info ventana_info;
        int board_model;

        /* setup clock gating */
        ccgr_init();

        /* setup AIPS and disable watchdog */
        arch_cpu_init();

        /* setup AXI */
        gpr_init();

        /* iomux and setup of i2c */
        setup_iomux_uart();
        setup_ventana_i2c();

        /* setup GP timer */
        timer_init();

        /* UART clocks enabled and gd valid - init serial console */
        preloader_console_init();

        /* read/validate EEPROM info to determine board model and SDRAM cfg */
        board_model = read_eeprom(CONFIG_I2C_GSC, &ventana_info);

        /* configure model-specific gpio */
        setup_iomux_gpio(board_model, &ventana_info);

        /* provide some some default: 32bit 128MB */
        if (GW_UNKNOWN == board_model)
                hang();

        /* configure MMDC for SDRAM width/size and per-model calibration */
        spl_dram_init(8 << ventana_info.sdram_width,
                      16 << ventana_info.sdram_size,
                      board_model);
}

void board_boot_order(u32 *spl_boot_list)
{
        spl_boot_list[0] = spl_boot_device();
        switch (spl_boot_list[0]) {
        case BOOT_DEVICE_NAND:
                spl_boot_list[1] = BOOT_DEVICE_MMC1;
                spl_boot_list[2] = BOOT_DEVICE_UART;
                break;
        case BOOT_DEVICE_MMC1:
                spl_boot_list[1] = BOOT_DEVICE_UART;
                break;
        }
}

/* called from board_init_r after gd setup if CONFIG_SPL_BOARD_INIT defined */
/* its our chance to print info about boot device */
void spl_board_init(void)
{
        /* determine boot device from SRC_SBMR1 (BOOT_CFG[4:1]) or SRC_GPR9 */
        u32 boot_device = spl_boot_device();

        switch (boot_device) {
        case BOOT_DEVICE_MMC1:
                puts("Booting from MMC\n");
                break;
        case BOOT_DEVICE_NAND:
                puts("Booting from NAND\n");
                break;
        case BOOT_DEVICE_SATA:
                puts("Booting from SATA\n");
                break;
        default:
                puts("Unknown boot device\n");
        }

        /* PMIC init */
        setup_pmic();
}

#ifdef CONFIG_SPL_OS_BOOT
/* return 1 if we wish to boot to uboot vs os (falcon mode) */
int spl_start_uboot(void)
{
        unsigned char ret = 1;

        debug("%s\n", __func__);
#ifdef CONFIG_SPL_ENV_SUPPORT
        env_init();
        env_load();
        debug("boot_os=%s\n", env_get("boot_os"));
        if (env_get_yesno("boot_os") == 1)
                ret = 0;
#else
        /* use i2c-0:0x50:0x00 for falcon boot mode (0=linux, else uboot) */
        i2c_set_bus_num(0);
        gsc_i2c_read(0x50, 0x0, 1, &ret, 1);
#endif
        if (!ret)
                gsc_boot_wd_disable();

        debug("%s booting %s\n", __func__, ret ? "uboot" : "linux");
        return ret;
}
#endif