nxp_t2080.c

/* nxp_t2080.c
 *
 * Copyright (C) 2022 wolfSSL Inc.
 *
 * This file is part of wolfBoot.
 *
 * wolfBoot is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * wolfBoot is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
 */
#include <stdint.h>
#include "target.h"
#include "printf.h"
#include "image.h" /* for RAMFUNCTION */
#include "nxp_ppc.h"

/* Tested on T2080E Rev 1.1, e6500 core 2.0, PVR 8040_0120 and SVR 8538_0011 */

/* T2080 */
#define SYS_CLK (600000000) /* 100MHz PLL with 6:1 = 600 MHz */

/* T2080 PC16552D Dual UART */
#define BAUD_RATE 115200
#define UART_SEL 0 /* select UART 0 or 1 */

#define UART_BASE(n) (CCSRBAR + 0x11C500 + (n * 0x1000))

#define UART_RBR(n)  *((volatile uint8_t*)(UART_BASE(n) + 0)) /* receiver buffer register */
#define UART_THR(n)  *((volatile uint8_t*)(UART_BASE(n) + 0)) /* transmitter holding register */
#define UART_IER(n)  *((volatile uint8_t*)(UART_BASE(n) + 1)) /* interrupt enable register */
#define UART_IIR(n)  *((volatile uint8_t*)(UART_BASE(n) + 2)) /* interrupt ID register */
#define UART_FCR(n)  *((volatile uint8_t*)(UART_BASE(n) + 2)) /* FIFO control register */
#define UART_LCR(n)  *((volatile uint8_t*)(UART_BASE(n) + 3)) /* line control register */
#define UART_MCR(n)  *((volatile uint8_t*)(UART_BASE(n) + 4)) /* modem control register */
#define UART_LSR(n)  *((volatile uint8_t*)(UART_BASE(n) + 5)) /* line status register */

/* enabled when UART_LCR_DLAB set */
#define UART_DLB(n)  *((volatile uint8_t*)(UART_BASE(n) + 0)) /* divisor least significant byte register */
#define UART_DMB(n)  *((volatile uint8_t*)(UART_BASE(n) + 1)) /* divisor most significant byte register */

#define UART_FCR_TFR  (0x04) /* Transmitter FIFO reset */
#define UART_FCR_RFR  (0x02) /* Receiver FIFO reset */
#define UART_FCR_FEN  (0x01) /* FIFO enable */
#define UART_LCR_DLAB (0x80) /* Divisor latch access bit */
#define UART_LCR_WLS  (0x03) /* Word length select: 8-bits */
#define UART_LSR_TEMT (0x40) /* Transmitter empty */
#define UART_LSR_THRE (0x20) /* Transmitter holding register empty */


/* T2080 IFC (Integrated Flash Controller) - RM 13.3 */
#define IFC_BASE        (CCSRBAR + 0x00124000)
#define IFC_MAX_BANKS   8

#define IFC_CSPR_EXT(n) *((volatile uint32_t*)(IFC_BASE + 0x000C + (n * 0xC))) /* Extended Base Address */
#define IFC_CSPR(n)     *((volatile uint32_t*)(IFC_BASE + 0x0010 + (n * 0xC))) /* Chip-select Property */
#define IFC_AMASK(n)    *((volatile uint32_t*)(IFC_BASE + 0x00A0 + (n * 0xC)))
#define IFC_CSOR(n)     *((volatile uint32_t*)(IFC_BASE + 0x0130 + (n * 0xC)))
#define IFC_CSOR_EXT(n) *((volatile uint32_t*)(IFC_BASE + 0x0134 + (n * 0xC)))
#define IFC_FTIM0(n)    *((volatile uint32_t*)(IFC_BASE + 0x01C0 + (n * 0x30)))
#define IFC_FTIM1(n)    *((volatile uint32_t*)(IFC_BASE + 0x01C4 + (n * 0x30)))
#define IFC_FTIM2(n)    *((volatile uint32_t*)(IFC_BASE + 0x01C8 + (n * 0x30)))
#define IFC_FTIM3(n)    *((volatile uint32_t*)(IFC_BASE + 0x01CC + (n * 0x30)))

#define IFC_CSPR_PHYS_ADDR(x) (((uint32_t)x) & 0xFFFF0000) /* Physical base address */
#define IFC_CSPR_PORT_SIZE_8  0x00000080 /* Port Size 8 */
#define IFC_CSPR_PORT_SIZE_16 0x00000100 /* Port Size 16 */
#define IFC_CSPR_WP           0x00000040 /* Write Protect */
#define IFC_CSPR_MSEL_NOR     0x00000000 /* Mode Select - NOR */
#define IFC_CSPR_MSEL_NAND    0x00000002 /* Mode Select - NAND */
#define IFC_CSPR_MSEL_GPCM    0x00000004 /* Mode Select - GPCM (General-purpose chip-select machine) */
#define IFC_CSPR_V            0x00000001 /* Bank Valid */

/* NOR Timings (IFC clocks) */
#define IFC_FTIM0_NOR_TACSE(n) (((n) & 0x0F) << 28) /* After address hold cycle */
#define IFC_FTIM0_NOR_TEADC(n) (((n) & 0x3F) << 16) /* External latch address delay cycles */
#define IFC_FTIM0_NOR_TAVDS(n) (((n) & 0x3F) << 8)  /* Delay between CS assertion */
#define IFC_FTIM0_NOR_TEAHC(n) (((n) & 0x3F) << 0)  /* External latch address hold cycles */
#define IFC_FTIM1_NOR_TACO(n)  (((n) & 0xFF) << 24) /* CS assertion to output enable */
#define IFC_FTIM1_NOR_TRAD(n)  (((n) & 0x3F) << 8)  /* read access delay */
#define IFC_FTIM1_NOR_TSEQ(n)  (((n) & 0x3F) << 0)  /* sequential read access delay */
#define IFC_FTIM2_NOR_TCS(n)   (((n) & 0x0F) << 24) /* Chip-select assertion setup time */
#define IFC_FTIM2_NOR_TCH(n)   (((n) & 0x0F) << 18) /* Chip-select hold time */
#define IFC_FTIM2_NOR_TWPH(n)  (((n) & 0x3F) << 10) /* Chip-select hold time */
#define IFC_FTIM2_NOR_TWP(n)   (((n) & 0xFF) << 0)  /* Write enable pulse width */

/* GPCM Timings (IFC clocks) */
#define IFC_FTIM0_GPCM_TACSE(n) (((n) & 0x0F) << 28) /* After address hold cycle */
#define IFC_FTIM0_GPCM_TEADC(n) (((n) & 0x3F) << 16) /* External latch address delay cycles */
#define IFC_FTIM0_GPCM_TEAHC(n) (((n) & 0x3F) << 0)  /* External latch address hold cycles */
#define IFC_FTIM1_GPCM_TACO(n)  (((n) & 0xFF) << 24) /* CS assertion to output enable */
#define IFC_FTIM1_GPCM_TRAD(n)  (((n) & 0x3F) << 8)  /* read access delay */
#define IFC_FTIM2_GPCM_TCS(n)   (((n) & 0x0F) << 24) /* Chip-select assertion setup time */
#define IFC_FTIM2_GPCM_TCH(n)   (((n) & 0x0F) << 18) /* Chip-select hold time */
#define IFC_FTIM2_GPCM_TWP(n)   (((n) & 0xFF) << 0)  /* Write enable pulse width */

/* IFC AMASK - RM Table 13-3 - Count of MSB minus 1 */
enum ifc_amask_sizes {
    IFC_AMASK_64KB =  0xFFFF0000,
    IFC_AMASK_128KB = 0xFFFE0000,
    IFC_AMASK_256KB = 0xFFFC0000,
    IFC_AMASK_512KB = 0xFFF80000,
    IFC_AMASK_1MB   = 0xFFF00000,
    IFC_AMASK_2MB   = 0xFFE00000,
    IFC_AMASK_4MB   = 0xFFC00000,
    IFC_AMASK_8MB   = 0xFF800000,
    IFC_AMASK_16MB  = 0xFF000000,
    IFC_AMASK_32MB  = 0xFE000000,
    IFC_AMASK_64MB  = 0xFC000000,
    IFC_AMASK_128MB = 0xF8000000,
    IFC_AMASK_256MB = 0xF0000000,
    IFC_AMASK_512MB = 0xE0000000,
    IFC_AMASK_1GB   = 0xC0000000,
    IFC_AMASK_2GB   = 0x80000000,
    IFC_AMASK_4GB   = 0x00000000,
};


/* NOR Flash */
#define FLASH_BASE        0xE8000000

#define FLASH_BANK_SIZE   (128*1024*1024)
#define FLASH_PAGE_SIZE   (1024) /* program buffer */
#define FLASH_SECTOR_SIZE (128*1024)
#define FLASH_SECTORS     (FLASH_BANK_SIZE / FLASH_SECTOR_SIZE)
#define FLASH_CFI_16BIT   0x02 /* word */
#define FLASH_CFI_WIDTH   FLASH_CFI_16BIT

#define FLASH_ERASE_TOUT  60000 /* Flash Erase Timeout (ms) */
#define FLASH_WRITE_TOUT  500   /* Flash Write Timeout (ms) */


#if 0
    #define ENABLE_CPLD
#endif
/* CPLD */
#define CPLD_BASE               0xFFDF0000
#define CPLD_BASE_PHYS_HIGH     0xFULL

#define CPLD_SPARE              0x00
#define CPLD_SATA_MUX_SEL       0x02
#define CPLD_BANK_SEL           0x04
#define CPLD_FW_REV             0x06
#define CPLD_TTL_RW             0x08
#define CPLD_TTL_LPBK           0x0A
#define CPLD_TTL_DATA           0x0C
#define CPLD_PROC_STATUS        0x0E /* write 1 to enable proc reset function, reset default value is 0 */
#define CPLD_FPGA_RDY           0x10 /* read only when reg read 0x0DB1 then fpga is ready */
#define CPLD_PCIE_SW_RESET      0x12 /* write 1 to reset the PCIe switch */
#define CPLD_WR_TTL_INT_EN      0x14
#define CPLD_WR_TTL_INT_DIR     0x16
#define CPLD_INT_STAT           0x18
#define CPLD_WR_TEMP_ALM_OVRD   0x1A /* write 0 to enable temp shutdown. reset default value is 1 */
#define CPLD_PWR_DWN_CMD        0x1C
#define CPLD_TEMP_ALM_INT_STAT  0x1E
#define CPLD_WR_TEMP_ALM_INT_EN 0x20

#define CPLD_FLASH_BANK_0       0x00
#define CPLD_FLASH_BANK_1       0x01

#define CPLD_DATA(n) *((volatile uint8_t*)(CPLD_BASE + n))


/* SATA */
#define SATA_ENBL (*(volatile uint32_t *)(0xB1003F4C)) /* also saw 0xB4003F4C */

/* DDR */
/* NAII 68PPC2 - 8GB discrete DDR3 IM8G08D3EBDG-15E */
/* 1333.333 MT/s data rate 8 GiB (DDR3, 64-bit, CL=9, ECC on) */
#define DDR_N_RANKS     2
#define DDR_RANK_DENS   0x100000000
#define DDR_SDRAM_WIDTH 64
#define DDR_EC_SDRAM_W  8
#define DDR_N_ROW_ADDR  16
#define DDR_N_COL_ADDR  10
#define DDR_N_BANKS     8
#define DDR_EDC_CONFIG  2
#define DDR_BURSTL_MASK 0x0c
#define DDR_TCKMIN_X_PS 1500
#define DDR_TCMMAX_PS   3000
#define DDR_CASLAT_X    0x000007E0
#define DDR_TAA_PS      13500
#define DDR_TRCD_PS     13500
#define DDR_TRP_PS      13500
#define DDR_TRAS_PS     36000
#define DDR_TRC_PS      49500
#define DDR_TFAW_PS     30000
#define DDR_TWR_PS      15000
#define DDR_TRFC_PS     260000
#define DDR_TRRD_PS     6000
#define DDR_TWTR_PS     7500
#define DDR_TRTP_PS     7500
#define DDR_REF_RATE_PS 7800000

#define DDR_CS0_BNDS_VAL       0x000000FF
#define DDR_CS1_BNDS_VAL       0x010001FF
#define DDR_CS2_BNDS_VAL       0x0300033F
#define DDR_CS3_BNDS_VAL       0x0340037F
#define DDR_CS0_CONFIG_VAL     0x80044402
#define DDR_CS1_CONFIG_VAL     0x80044402
#define DDR_CS2_CONFIG_VAL     0x00000202
#define DDR_CS3_CONFIG_VAL     0x00040202
#define DDR_CS_CONFIG_2_VAL    0x00000000

#define DDR_TIMING_CFG_0_VAL   0xFF530004
#define DDR_TIMING_CFG_1_VAL   0x98906345
#define DDR_TIMING_CFG_2_VAL   0x0040A114
#define DDR_TIMING_CFG_3_VAL   0x010A1100
#define DDR_TIMING_CFG_4_VAL   0x00000001
#define DDR_TIMING_CFG_5_VAL   0x04402400

#define DDR_SDRAM_MODE_VAL     0x00441C70
#define DDR_SDRAM_MODE_2_VAL   0x00980000
#define DDR_SDRAM_MODE_3_8_VAL 0x00000000
#define DDR_SDRAM_MD_CNTL_VAL  0x00000000

#define DDR_SDRAM_CFG_VAL      0xE7040000
#define DDR_SDRAM_CFG_2_VAL    0x00401010

#define DDR_SDRAM_INTERVAL_VAL 0x0C300100
#define DDR_DATA_INIT_VAL      0xDEADBEEF
#define DDR_SDRAM_CLK_CNTL_VAL 0x02400000
#define DDR_ZQ_CNTL_VAL        0x89080600

#define DDR_WRLVL_CNTL_VAL     0x8675F604
#define DDR_WRLVL_CNTL_2_VAL   0x05060607
#define DDR_WRLVL_CNTL_3_VAL   0x080A0A0B

#define DDR_SDRAM_RCW_1_VAL    0x00000000
#define DDR_SDRAM_RCW_2_VAL    0x00000000

#define DDR_DDRCDR_1_VAL       0x80040000
#define DDR_DDRCDR_2_VAL       0x00000001

#define DDR_ERR_INT_EN_VAL     0x0000001D
#define DDR_ERR_SBE_VAL        0x00010000


/* 12.4 DDR Memory Map */
#define DDR_BASE           (CCSRBAR + 0x8000)

#define DDR_CS_BNDS(n)     *((volatile uint32_t*)(DDR_BASE + 0x000 + (n * 8))) /* Chip select n memory bounds */
#define DDR_CS_CONFIG(n)   *((volatile uint32_t*)(DDR_BASE + 0x080 + (n * 4))) /* Chip select n configuration */
#define DDR_CS_CONFIG_2(n) *((volatile uint32_t*)(DDR_BASE + 0x0C0 + (n * 4))) /* Chip select n configuration 2 */
#define DDR_SDRAM_CFG      *((volatile uint32_t*)(DDR_BASE + 0x110)) /* DDR SDRAM control configuration */
#define DDR_SDRAM_CFG_2    *((volatile uint32_t*)(DDR_BASE + 0x114)) /* DDR SDRAM control configuration 2 */
#define DDR_SDRAM_INTERVAL *((volatile uint32_t*)(DDR_BASE + 0x124)) /* DDR SDRAM interval configuration */
#define DDR_INIT_ADDR      *((volatile uint32_t*)(DDR_BASE + 0x148)) /* DDR training initialization address */
#define DDR_INIT_EXT_ADDR  *((volatile uint32_t*)(DDR_BASE + 0x14C)) /* DDR training initialization extended address */
#define DDR_DATA_INIT      *((volatile uint32_t*)(DDR_BASE + 0x128)) /* DDR training initialization value */
#define DDR_TIMING_CFG_0   *((volatile uint32_t*)(DDR_BASE + 0x104)) /* DDR SDRAM timing configuration 0 */
#define DDR_TIMING_CFG_1   *((volatile uint32_t*)(DDR_BASE + 0x108)) /* DDR SDRAM timing configuration 1 */
#define DDR_TIMING_CFG_2   *((volatile uint32_t*)(DDR_BASE + 0x10C)) /* DDR SDRAM timing configuration 2 */
#define DDR_TIMING_CFG_3   *((volatile uint32_t*)(DDR_BASE + 0x100)) /* DDR SDRAM timing configuration 3 */
#define DDR_TIMING_CFG_4   *((volatile uint32_t*)(DDR_BASE + 0x160)) /* DDR SDRAM timing configuration 4 */
#define DDR_TIMING_CFG_5   *((volatile uint32_t*)(DDR_BASE + 0x164)) /* DDR SDRAM timing configuration 5 */
#define DDR_TIMING_CFG_6   *((volatile uint32_t*)(DDR_BASE + 0x168)) /* DDR SDRAM timing configuration 6 */
#define DDR_ZQ_CNTL        *((volatile uint32_t*)(DDR_BASE + 0x170)) /* DDR ZQ calibration control */
#define DDR_WRLVL_CNTL     *((volatile uint32_t*)(DDR_BASE + 0x174)) /* DDR write leveling control */
#define DDR_WRLVL_CNTL_2   *((volatile uint32_t*)(DDR_BASE + 0x190)) /* DDR write leveling control 2 */
#define DDR_WRLVL_CNTL_3   *((volatile uint32_t*)(DDR_BASE + 0x194)) /* DDR write leveling control 3 */
#define DDR_SR_CNTR        *((volatile uint32_t*)(DDR_BASE + 0x17C)) /* DDR Self Refresh Counter */
#define DDR_SDRAM_RCW_1    *((volatile uint32_t*)(DDR_BASE + 0x180)) /* DDR Register Control Word 1 */
#define DDR_SDRAM_RCW_2    *((volatile uint32_t*)(DDR_BASE + 0x184)) /* DDR Register Control Word 2 */
#define DDR_DDRCDR_1       *((volatile uint32_t*)(DDR_BASE + 0xB28)) /* DDR Control Driver Register 1 */
#define DDR_DDRCDR_2       *((volatile uint32_t*)(DDR_BASE + 0xB2C)) /* DDR Control Driver Register 2 */
#define DDR_DDRDSR_1       *((volatile uint32_t*)(DDR_BASE + 0xB20)) /* DDR Debug Status Register 1 */
#define DDR_DDRDSR_2       *((volatile uint32_t*)(DDR_BASE + 0xB24)) /* DDR Debug Status Register 2 */
#define DDR_ERR_DISABLE    *((volatile uint32_t*)(DDR_BASE + 0xE44)) /* Memory error disable */
#define DDR_ERR_INT_EN     *((volatile uint32_t*)(DDR_BASE + 0xE48)) /* Memory error interrupt enable */
#define DDR_ERR_SBE        *((volatile uint32_t*)(DDR_BASE + 0xE58)) /* Single-Bit ECC memory error management */
#define DDR_SDRAM_MODE     *((volatile uint32_t*)(DDR_BASE + 0x118)) /* DDR SDRAM mode configuration */
#define DDR_SDRAM_MODE_2   *((volatile uint32_t*)(DDR_BASE + 0x11C)) /* DDR SDRAM mode configuration 2 */
#define DDR_SDRAM_MODE_3   *((volatile uint32_t*)(DDR_BASE + 0x200)) /* DDR SDRAM mode configuration 3 */
#define DDR_SDRAM_MODE_4   *((volatile uint32_t*)(DDR_BASE + 0x204)) /* DDR SDRAM mode configuration 4 */
#define DDR_SDRAM_MODE_5   *((volatile uint32_t*)(DDR_BASE + 0x208)) /* DDR SDRAM mode configuration 5 */
#define DDR_SDRAM_MODE_6   *((volatile uint32_t*)(DDR_BASE + 0x20C)) /* DDR SDRAM mode configuration 6 */
#define DDR_SDRAM_MODE_7   *((volatile uint32_t*)(DDR_BASE + 0x210)) /* DDR SDRAM mode configuration 7 */
#define DDR_SDRAM_MODE_8   *((volatile uint32_t*)(DDR_BASE + 0x214)) /* DDR SDRAM mode configuration 8 */
#define DDR_SDRAM_MD_CNTL  *((volatile uint32_t*)(DDR_BASE + 0x120)) /* DDR SDRAM mode control */
#define DDR_SDRAM_CLK_CNTL *((volatile uint32_t*)(DDR_BASE + 0x130)) /* DDR SDRAM clock control */

#define DDR_SDRAM_CFG_MEM_EN   0x80000000 /* SDRAM interface logic is enabled */
#define DDR_SDRAM_CFG_2_D_INIT 0x00000010 /* data initialization in progress */


/* generic share NXP QorIQ driver code */
#include "nxp_ppc.c"


#ifdef DEBUG_UART
void uart_init(void)
{
    /* calc divisor for UART
     * example config values:
     *  clock_div, baud, base_clk  163 115200 300000000
     * +0.5 to round up
     */
    uint32_t div = (((SYS_CLK / 2.0) / (16 * BAUD_RATE)) + 0.5);

    while (!(UART_LSR(UART_SEL) & UART_LSR_TEMT))
       ;

    /* set ier, fcr, mcr */
    UART_IER(UART_SEL) = 0;
    UART_FCR(UART_SEL) = (UART_FCR_TFR | UART_FCR_RFR | UART_FCR_FEN);

    /* enable baud rate access (DLAB=1) - divisor latch access bit*/
    UART_LCR(UART_SEL) = (UART_LCR_DLAB | UART_LCR_WLS);
    /* set divisor */
    UART_DLB(UART_SEL) = (div & 0xff);
    UART_DMB(UART_SEL) = ((div>>8) & 0xff);
    /* disable rate access (DLAB=0) */
    UART_LCR(UART_SEL) = (UART_LCR_WLS);
}

void uart_write(const char* buf, uint32_t sz)
{
    uint32_t pos = 0;
    while (sz-- > 0) {
        char c = buf[pos++];
        if (c == '\n') { /* handle CRLF */
            while ((UART_LSR(UART_SEL) & UART_LSR_THRE) == 0);
            UART_THR(UART_SEL) = '\r';
        }
        while ((UART_LSR(UART_SEL) & UART_LSR_THRE) == 0);
        UART_THR(UART_SEL) = c;
    }
}
#endif /* DEBUG_UART */

void law_init(void)
{
    /* Buffer Manager (BMan) (control) - probably not required */
    set_law(3, 0xF, 0xF4000000, LAW_TRGT_BMAN, LAW_SIZE_32MB, 1);
}

static void hal_flash_init(void)
{
    /* IFC - NOR Flash */
    /* LAW is also set in boot_ppc_start.S:flash_law */
    set_law(1, FLASH_BASE_PHYS_HIGH, FLASH_BASE, LAW_TRGT_IFC, LAW_SIZE_128MB, 1);

    /* NOR IFC Flash Timing Parameters */
    IFC_FTIM0(0) = (IFC_FTIM0_NOR_TACSE(4) | \
                    IFC_FTIM0_NOR_TEADC(5) | \
                    IFC_FTIM0_NOR_TEAHC(5));
    IFC_FTIM1(0) = (IFC_FTIM1_NOR_TACO(53) |
                    IFC_FTIM1_NOR_TRAD(26) |
                    IFC_FTIM1_NOR_TSEQ(19));
    IFC_FTIM2(0) = (IFC_FTIM2_NOR_TCS(4) |
                    IFC_FTIM2_NOR_TCH(4) |
                    IFC_FTIM2_NOR_TWPH(14) |
                    IFC_FTIM2_NOR_TWP(28));
    IFC_FTIM3(0) = 0;
    /* NOR IFC Definitions (CS0) */
    IFC_CSPR_EXT(0) = (0xF);
    IFC_CSPR(0) =     (IFC_CSPR_PHYS_ADDR(FLASH_BASE) | \
                       IFC_CSPR_PORT_SIZE_16 | \
                       IFC_CSPR_MSEL_NOR | \
                       IFC_CSPR_V);
    IFC_AMASK(0) = IFC_AMASK_128MB;
    IFC_CSOR(0) = 0x0000000C; /* TRHZ (80 clocks for read enable high) */
}

static void hal_ddr_init(void)
{
#ifdef ENABLE_DDR
    /* Map LAW for DDR */
    set_law(4, 0, 0, LAW_TRGT_DDR_1, LAW_SIZE_2GB, 0);

    /* If DDR is already enabled then just return */
    if (DDR_SDRAM_CFG & DDR_SDRAM_CFG_MEM_EN) {
        return;
    }

    /* Setup DDR CS (chip select) bounds */
    DDR_CS_BNDS(0) = DDR_CS0_BNDS_VAL;
    DDR_CS_CONFIG(0) = DDR_CS0_CONFIG_VAL;
    DDR_CS_CONFIG_2(0) = DDR_CS_CONFIG_2_VAL;
    DDR_CS_BNDS(1) = DDR_CS1_BNDS_VAL;
    DDR_CS_CONFIG(1) = DDR_CS1_CONFIG_VAL;
    DDR_CS_CONFIG_2(1) = DDR_CS_CONFIG_2_VAL;
    DDR_CS_BNDS(2) = DDR_CS2_BNDS_VAL;
    DDR_CS_CONFIG(2) = DDR_CS2_CONFIG_VAL;
    DDR_CS_CONFIG_2(2) = DDR_CS_CONFIG_2_VAL;
    DDR_CS_BNDS(3) = DDR_CS3_BNDS_VAL;
    DDR_CS_CONFIG(3) = DDR_CS3_CONFIG_VAL;
    DDR_CS_CONFIG_2(3) = DDR_CS_CONFIG_2_VAL;

    /* DDR SDRAM timing configuration */
    DDR_TIMING_CFG_0 = DDR_TIMING_CFG_0_VAL;
    DDR_TIMING_CFG_1 = DDR_TIMING_CFG_1_VAL;
    DDR_TIMING_CFG_2 = DDR_TIMING_CFG_2_VAL;
    DDR_TIMING_CFG_3 = DDR_TIMING_CFG_3_VAL;
    DDR_TIMING_CFG_4 = DDR_TIMING_CFG_4_VAL;
    DDR_TIMING_CFG_5 = DDR_TIMING_CFG_5_VAL;

    /* DDR SDRAM mode configuration */
    DDR_SDRAM_MODE =   DDR_SDRAM_MODE_VAL;
    DDR_SDRAM_MODE_2 = DDR_SDRAM_MODE_2_VAL;
    DDR_SDRAM_MODE_3 = DDR_SDRAM_MODE_3_8_VAL;
    DDR_SDRAM_MODE_4 = DDR_SDRAM_MODE_3_8_VAL;
    DDR_SDRAM_MODE_5 = DDR_SDRAM_MODE_3_8_VAL;
    DDR_SDRAM_MODE_6 = DDR_SDRAM_MODE_3_8_VAL;
    DDR_SDRAM_MODE_7 = DDR_SDRAM_MODE_3_8_VAL;
    DDR_SDRAM_MODE_8 = DDR_SDRAM_MODE_3_8_VAL;
    DDR_SDRAM_MD_CNTL = DDR_SDRAM_MD_CNTL_VAL;

    /* DDR Configuration */
    DDR_SDRAM_INTERVAL = DDR_SDRAM_INTERVAL_VAL;
    DDR_SDRAM_CLK_CNTL = DDR_SDRAM_CLK_CNTL_VAL;
    DDR_DATA_INIT = DDR_DATA_INIT_VAL;
    DDR_ZQ_CNTL = DDR_ZQ_CNTL_VAL;
    DDR_WRLVL_CNTL = DDR_WRLVL_CNTL_VAL;
    DDR_WRLVL_CNTL_2 = DDR_WRLVL_CNTL_2_VAL;
    DDR_WRLVL_CNTL_3 = DDR_WRLVL_CNTL_3_VAL;
    DDR_SR_CNTR = 0;
    DDR_SDRAM_RCW_1 = 0;
    DDR_SDRAM_RCW_2 = 0;
    DDR_DDRCDR_1 = DDR_DDRCDR_1_VAL;
    DDR_DDRCDR_2 = DDR_DDRCDR_2_VAL;
    DDR_SDRAM_CFG_2 = DDR_SDRAM_CFG_2_VAL;
    DDR_INIT_ADDR = 0;
    DDR_INIT_EXT_ADDR = 0;
    DDR_ERR_DISABLE = 0;
    DDR_ERR_INT_EN = DDR_ERR_INT_EN_VAL;
    DDR_ERR_SBE = DDR_ERR_SBE_VAL;

    /* Set values, but do not enable the DDR yet */
    DDR_SDRAM_CFG = (DDR_SDRAM_CFG_VAL & ~DDR_SDRAM_CFG_MEM_EN);

    /* TODO: Errata A009942 */

    /* Enable controller */
    DDR_SDRAM_CFG |= DDR_SDRAM_CFG_MEM_EN;
    __asm__ __volatile__("sync;isync");

    /* Wait for data initialization is complete */
    while ((DDR_SDRAM_CFG_2 & DDR_SDRAM_CFG_2_D_INIT));
#endif
}

void hal_early_init(void)
{
    hal_ddr_init();
}

static void hal_cpld_init(void)
{
#ifdef ENABLE_CPLD
    /* CPLD IFC Timing Parameters */
    IFC_FTIM0(3) = (IFC_FTIM0_GPCM_TACSE(16UL) |
                    IFC_FTIM0_GPCM_TEADC(16UL) |
                    IFC_FTIM0_GPCM_TEAHC(16UL));
    IFC_FTIM1(3) = (IFC_FTIM1_GPCM_TACO(16UL) |
                    IFC_FTIM1_GPCM_TRAD(31UL));
    IFC_FTIM2(3) = (IFC_FTIM2_GPCM_TCS(16UL) |
                    IFC_FTIM2_GPCM_TCH(8UL) |
                    IFC_FTIM2_GPCM_TWP(31UL));
    IFC_FTIM3(3) = 0;

    /* CPLD IFC Definitions (CS3) */
    IFC_CSPR_EXT(3) = CPLD_BASE_PHYS_HIGH;
    IFC_CSPR(3) =     (IFC_CSPR_PHYS_ADDR(CPLD_BASE) |
                       IFC_CSPR_PORT_SIZE_16 |
                       IFC_CSPR_MSEL_GPCM |
                       IFC_CSPR_V);
    IFC_AMASK(3) = IFC_AMASK_64KB;
    IFC_CSOR(3) = 0;

    /* IFC - CPLD */
    set_law(2, CPLD_BASE_PHYS_HIGH, CPLD_BASE,
        LAW_TRGT_IFC, LAW_SIZE_4KB, 1);

    /* CPLD - TBL=1, Entry 17 */
    set_tlb(1, 17, CPLD_BASE, CPLD_BASE, CPLD_BASE_PHYS_HIGH,
        MAS3_SX | MAS3_SW | MAS3_SR, MAS2_I | MAS2_G,
        0, BOOKE_PAGESZ_4K, 1);
#endif
}

void hal_init(void)
{
#ifdef DEBUG_UART
    uint32_t fw;
#endif

    law_init();

#ifdef DEBUG_UART
    uart_init();
    uart_write("wolfBoot Init\n", 14);
#endif

    hal_flash_init();
    hal_cpld_init();

#ifdef ENABLE_CPLD
    CPLD_DATA(CPLD_PROC_STATUS) = 1; /* Enable proc reset */
    CPLD_DATA(CPLD_WR_TEMP_ALM_OVRD) = 0; /* Enable temp alarm */

#ifdef DEBUG_UART
    fw = CPLD_DATA(CPLD_FW_REV);
    wolfBoot_printf("CPLD FW Rev: 0x%x\n", fw);
#endif
#endif /* ENABLE_CPLD */

#if 0 /* not tested */
    /* Disable SATA Write Protection */
    SATA_ENBL = 0;
#endif
}

int hal_flash_write(uint32_t address, const uint8_t *data, int len)
{
    (void)address;
    (void)data;
    (void)len;
    /* TODO: Implement NOR flash write using IFC */
    return 0;
}

int hal_flash_erase(uint32_t address, int len)
{
    (void)address;
    (void)len;
    /* TODO: Implement NOR flash erase using IFC */
    return 0;
}

void hal_flash_unlock(void)
{
    /* Disable all flash protection bits */
    /* enter Non-volatile protection mode (C0h) */
    *((volatile uint16_t*)(FLASH_BASE + 0xAAA)) = 0xAAAA;
    *((volatile uint16_t*)(FLASH_BASE + 0x554)) = 0x5555;
    *((volatile uint16_t*)(FLASH_BASE + 0xAAA)) = 0xC0C0;
    /* clear all protection bit (80h/30h) */
    *((volatile uint16_t*)(FLASH_BASE + 0x000)) = 0x8080;
    *((volatile uint16_t*)(FLASH_BASE + 0x000)) = 0x3030;
    /* exit Non-volatile protection mode (90h/00h) */
    *((volatile uint16_t*)(FLASH_BASE + 0x000)) = 0x9090;
    *((volatile uint16_t*)(FLASH_BASE + 0x000)) = 0x0000;
}

void hal_flash_lock(void)
{
    /* Enable all flash protection bits */
    /* enter Non-volatile protection mode (C0h) */
    *((volatile uint16_t*)(FLASH_BASE + 0xAAA)) = 0xAAAA;
    *((volatile uint16_t*)(FLASH_BASE + 0x554)) = 0x5555;
    *((volatile uint16_t*)(FLASH_BASE + 0xAAA)) = 0xC0C0;
    /* set all protection bit (A0h/00h) */
    *((volatile uint16_t*)(FLASH_BASE + 0x000)) = 0xA0A0;
    *((volatile uint16_t*)(FLASH_BASE + 0x000)) = 0x0000;
    /* exit Non-volatile protection mode (90h/00h) */
    *((volatile uint16_t*)(FLASH_BASE + 0x000)) = 0x9090;
    *((volatile uint16_t*)(FLASH_BASE + 0x000)) = 0x0000;
}

void hal_prepare_boot(void)
{

}

#ifdef MMU
void* hal_get_dts_address(void)
{
    return (void*)WOLFBOOT_DTS_BOOT_ADDRESS;
}
#endif