/*
 * (C) Copyright 2007-2009
 * Larry Johnson, lrj@acm.org
 *
 * (C) Copyright 2006-2007
 * Stefan Roese, DENX Software Engineering, sr@denx.de.
 *
 * (C) Copyright 2006
 * Jacqueline Pira-Ferriol, AMCC/IBM, jpira-ferriol@fr.ibm.com
 * Alain Saurel,            AMCC/IBM, alain.saurel@fr.ibm.com
 *
 * This program 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 2 of
 * the License, or (at your option) any later version.
 *
 * This program 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., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <fdt_support.h>
#include <i2c.h>
#include <libfdt.h>
#include <ppc440.h>
#include <asm/bitops.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/ppc4xx-uic.h>
#include <asm/processor.h>

DECLARE_GLOBAL_DATA_PTR;

extern flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */

ulong flash_get_size(ulong base, int banknum);

#if defined(CONFIG_KORAT_PERMANENT)
void korat_buzzer(int const on)
{
        if (on) {
                out_8((u8 *) CONFIG_SYS_CPLD_BASE + 0x05,
                      in_8((u8 *) CONFIG_SYS_CPLD_BASE + 0x05) | 0x80);
        } else {
                out_8((u8 *) CONFIG_SYS_CPLD_BASE + 0x05,
                      in_8((u8 *) CONFIG_SYS_CPLD_BASE + 0x05) & ~0x80);
        }
}
#endif

int board_early_init_f(void)
{
        uint32_t sdr0_pfc1, sdr0_pfc2;
        uint32_t reg;
        int eth;

#if defined(CONFIG_KORAT_PERMANENT)
        unsigned mscount;

        extern void korat_branch_absolute(uint32_t addr);

        for (mscount = 0;  mscount < CONFIG_SYS_KORAT_MAN_RESET_MS; ++mscount) {
                udelay(1000);
                if (gpio_read_in_bit(CONFIG_SYS_GPIO_RESET_PRESSED_)) {
                        /* This call does not return. */
                        korat_branch_absolute(
                                CONFIG_SYS_FLASH1_TOP - 2 * CONFIG_ENV_SECT_SIZE - 4);
                }
        }
        korat_buzzer(1);
        while (!gpio_read_in_bit(CONFIG_SYS_GPIO_RESET_PRESSED_))
                udelay(1000);

        korat_buzzer(0);
#endif

        mtdcr(EBC0_CFGADDR, EBC0_CFG);
        mtdcr(EBC0_CFGDATA, 0xb8400000);

        /*
         * Setup the interrupt controller polarities, triggers, etc.
         */
        mtdcr(UIC0SR, 0xffffffff);      /* clear all */
        mtdcr(UIC0ER, 0x00000000);      /* disable all */
        mtdcr(UIC0CR, 0x00000005);      /* ATI & UIC1 crit are critical */
        mtdcr(UIC0PR, 0xfffff7ff);      /* per ref-board manual */
        mtdcr(UIC0TR, 0x00000000);      /* per ref-board manual */
        mtdcr(UIC0VR, 0x00000000);      /* int31 highest, base=0x000 */
        mtdcr(UIC0SR, 0xffffffff);      /* clear all */

        mtdcr(UIC1SR, 0xffffffff);      /* clear all */
        mtdcr(UIC1ER, 0x00000000);      /* disable all */
        mtdcr(UIC1CR, 0x00000000);      /* all non-critical */
        mtdcr(UIC1PR, 0xffffffff);      /* per ref-board manual */
        mtdcr(UIC1TR, 0x00000000);      /* per ref-board manual */
        mtdcr(UIC1VR, 0x00000000);      /* int31 highest, base=0x000 */
        mtdcr(UIC1SR, 0xffffffff);      /* clear all */

        mtdcr(UIC2SR, 0xffffffff);      /* clear all */
        mtdcr(UIC2ER, 0x00000000);      /* disable all */
        mtdcr(UIC2CR, 0x00000000);      /* all non-critical */
        mtdcr(UIC2PR, 0xffffffff);      /* per ref-board manual */
        mtdcr(UIC2TR, 0x00000000);      /* per ref-board manual */
        mtdcr(UIC2VR, 0x00000000);      /* int31 highest, base=0x000 */
        mtdcr(UIC2SR, 0xffffffff);      /* clear all */

        /*
         * Take sim card reader and CF controller out of reset.  Also enable PHY
         * auto-detect until board-specific PHY resets are available.
         */
        out_8((u8 *) CONFIG_SYS_CPLD_BASE + 0x02, 0xC0);

        /* Configure the two Ethernet PHYs.  For each PHY, configure for fiber
         * if the SFP module is present, and for copper if it is not present.
         */
        for (eth = 0; eth < 2; ++eth) {
                if (gpio_read_in_bit(CONFIG_SYS_GPIO_SFP0_PRESENT_ + eth)) {
                        /* SFP module not present: configure PHY for copper. */
                        /* Set PHY to autonegotate 10 MB, 100MB, or 1 GB */
                        out_8((u8 *) CONFIG_SYS_CPLD_BASE + 0x03,
                              in_8((u8 *) CONFIG_SYS_CPLD_BASE + 0x03) |
                              0x06 << (4 * eth));
                } else {
                        /* SFP module present: configure PHY for fiber and
                           enable output */
                        gpio_write_bit(CONFIG_SYS_GPIO_PHY0_FIBER_SEL + eth, 1);
                        gpio_write_bit(CONFIG_SYS_GPIO_SFP0_TX_EN_ + eth, 0);
                }
        }
        /* enable Ethernet: set GPIO45 and GPIO46 to 1 */
        gpio_write_bit(CONFIG_SYS_GPIO_PHY0_EN, 1);
        gpio_write_bit(CONFIG_SYS_GPIO_PHY1_EN, 1);

        /* Wait 1 ms, then enable Fiber signal detect to PHYs. */
        udelay(1000);
        out_8((u8 *) CONFIG_SYS_CPLD_BASE + 0x03,
              in_8((u8 *) CONFIG_SYS_CPLD_BASE + 0x03) | 0x88);

        /* select Ethernet (and optionally IIC1) pins */
        mfsdr(SDR0_PFC1, sdr0_pfc1);
        sdr0_pfc1 = (sdr0_pfc1 & ~SDR0_PFC1_SELECT_MASK) |
                SDR0_PFC1_SELECT_CONFIG_4;
#ifdef CONFIG_I2C_MULTI_BUS
        sdr0_pfc1 |= ((sdr0_pfc1 & ~SDR0_PFC1_SIS_MASK) | SDR0_PFC1_SIS_IIC1_SEL);
#endif
        mfsdr(SDR0_PFC2, sdr0_pfc2);
        sdr0_pfc2 = (sdr0_pfc2 & ~SDR0_PFC2_SELECT_MASK) |
                SDR0_PFC2_SELECT_CONFIG_4;
        mtsdr(SDR0_PFC2, sdr0_pfc2);
        mtsdr(SDR0_PFC1, sdr0_pfc1);

        /* PCI arbiter enabled */
        mfsdr(SDR0_PCI0, reg);
        mtsdr(SDR0_PCI0, 0x80000000 | reg);

        return 0;
}

/*
 * The boot flash on CS0 normally has its write-enable pin disabled, and so will
 * not respond to CFI commands.  This routine therefore fills in the flash
 * information for the boot flash.  (The flash at CS1 operates normally.)
 */
ulong board_flash_get_legacy (ulong base, int banknum, flash_info_t * info)
{
        uint32_t addr;
        int i;

        if (1 != banknum)
                return 0;

        info->size              = CONFIG_SYS_FLASH0_SIZE;
        info->sector_count      = CONFIG_SYS_FLASH0_SIZE / 0x20000;
        info->flash_id          = 0x01000000;
        info->portwidth         = 2;
        info->chipwidth         = 2;
        info->buffer_size       = 32;
        info->erase_blk_tout    = 16384;
        info->write_tout        = 2;
        info->buffer_write_tout = 5;
        info->vendor            = 2;
        info->cmd_reset         = 0x00F0;
        info->interface         = 2;
        info->legacy_unlock     = 0;
        info->manufacturer_id   = 1;
        info->device_id         = 0x007E;

#if CONFIG_SYS_FLASH0_SIZE == 0x01000000
        info->device_id2        = 0x2101;
#elif CONFIG_SYS_FLASH0_SIZE == 0x04000000
        info->device_id2        = 0x2301;
#else
#error Unable to set device_id2 for current CONFIG_SYS_FLASH0_SIZE
#endif

        info->ext_addr          = 0x0040;
        info->cfi_version       = 0x3133;
        info->cfi_offset        = 0x0055;
        info->addr_unlock1      = 0x00000555;
        info->addr_unlock2      = 0x000002AA;
        info->name              = "CFI conformant";
        for (i = 0, addr = -info->size;
             i < info->sector_count;
             ++i, addr += 0x20000) {
                info->start[i] = addr;
                info->protect[i] = 0x00;
        }
        return 1;
}

static int man_data_read(unsigned int addr)
{
        /*
         * Read an octet of data from address "addr" in the manufacturer's
         * information serial EEPROM, or -1 on error.
         */
        u8 data[2];

        if (0 != i2c_probe(MAN_DATA_EEPROM_ADDR) ||
            0 != i2c_read(MAN_DATA_EEPROM_ADDR, addr, 1, data, 1)) {
                debug("man_data_read(0x%02X) failed\n", addr);
                return -1;
        }
        debug("man_info_read(0x%02X) returned 0x%02X\n", addr, data[0]);
        return data[0];
}

static unsigned int man_data_field_addr(unsigned int const field)
{
        /*
         * The manufacturer's information serial EEPROM contains a sequence of
         * zero-delimited fields.  Return the starting address of field "field",
         * or 0 on error.
         */
        unsigned addr, i;

        if (0 == field || 'A' != man_data_read(0) || '\0' != man_data_read(1))
                /* Only format "A" is currently supported */
                return 0;

        for (addr = 2, i = 1; i < field && addr < 256; ++addr) {
                if ('\0' == man_data_read(addr))
                        ++i;
        }
        return (addr < 256) ? addr : 0;
}

static char *man_data_read_field(char s[], unsigned const field,
                                 unsigned const length)
{
        /*
         * Place the null-terminated contents of field "field" of length
         * "length" from the manufacturer's information serial EEPROM into
         * string "s[length + 1]" and return a pointer to s, or return 0 on
         * error. In either case the original contents of s[] is not preserved.
         */
        unsigned addr, i;

        addr = man_data_field_addr(field);
        if (0 == addr || addr + length >= 255)
                return 0;

        for (i = 0; i < length; ++i) {
                int const c = man_data_read(addr++);

                if (c <= 0)
                        return 0;

                s[i] = (char)c;
        }
        if (0 != man_data_read(addr))
                return 0;

        s[i] = '\0';
        return s;
}

static void set_serial_number(void)
{
        /*
         * If the environmental variable "serial#" is not set, try to set it
         * from the manufacturer's information serial EEPROM.
         */
        char s[MAN_INFO_LENGTH + MAN_MAC_ADDR_LENGTH + 2];

        if (getenv("serial#"))
                return;

        if (!man_data_read_field(s, MAN_INFO_FIELD, MAN_INFO_LENGTH))
                return;

        s[MAN_INFO_LENGTH] = '-';
        if (!man_data_read_field(s + MAN_INFO_LENGTH + 1, MAN_MAC_ADDR_FIELD,
                                 MAN_MAC_ADDR_LENGTH))
                return;

        setenv("serial#", s);
}

static void set_mac_addresses(void)
{
        /*
         * If the environmental variables "ethaddr" and/or "eth1addr" are not
         * set, try to set them from the manufacturer's information serial
         * EEPROM.
         */

#if MAN_MAC_ADDR_LENGTH % 2 != 0
#error MAN_MAC_ADDR_LENGTH must be an even number
#endif

        char s[(3 * MAN_MAC_ADDR_LENGTH) / 2];
        char *src;
        char *dst;

        if (0 != getenv("ethaddr") && 0 != getenv("eth1addr"))
                return;

        if (0 == man_data_read_field(s + (MAN_MAC_ADDR_LENGTH / 2) - 1,
                                     MAN_MAC_ADDR_FIELD, MAN_MAC_ADDR_LENGTH))
                return;

        for (src = s + (MAN_MAC_ADDR_LENGTH / 2) - 1, dst = s; src != dst;) {
                *dst++ = *src++;
                *dst++ = *src++;
                *dst++ = ':';
        }
        if (0 == getenv("ethaddr"))
                setenv("ethaddr", s);

        if (0 == getenv("eth1addr")) {
                ++s[((3 * MAN_MAC_ADDR_LENGTH) / 2) - 2];
                setenv("eth1addr", s);
        }
}

int misc_init_r(void)
{
        uint32_t pbcr;
        int size_val;
        uint32_t reg;
        unsigned long usb2d0cr = 0;
        unsigned long usb2phy0cr, usb2h0cr = 0;
        unsigned long sdr0_pfc1;
        uint32_t const flash1_size = gd->bd->bi_flashsize - CONFIG_SYS_FLASH0_SIZE;
        char const *const act = getenv("usbact");
        char const *const usbcf = getenv("korat_usbcf");

        /*
         * Re-do FLASH1 sizing and adjust flash start and offset.
         */
        gd->bd->bi_flashstart = CONFIG_SYS_FLASH1_TOP - flash1_size;
        gd->bd->bi_flashoffset = 0;

        mtdcr(EBC0_CFGADDR, PB1CR);
        pbcr = mfdcr(EBC0_CFGDATA);
        size_val = ffs(flash1_size) - 21;
        pbcr = (pbcr & 0x0001ffff) | gd->bd->bi_flashstart | (size_val << 17);
        mtdcr(EBC0_CFGADDR, PB1CR);
        mtdcr(EBC0_CFGDATA, pbcr);

        /*
         * Re-check to get correct base address
         */
        flash_get_size(gd->bd->bi_flashstart, 0);

        /*
         * Re-do FLASH1 sizing and adjust flash offset to reserve space for
         * environment
         */
        gd->bd->bi_flashoffset =
                CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - CONFIG_SYS_FLASH1_ADDR;

        mtdcr(EBC0_CFGADDR, PB1CR);
        pbcr = mfdcr(EBC0_CFGDATA);
        size_val = ffs(gd->bd->bi_flashsize - CONFIG_SYS_FLASH0_SIZE) - 21;
        pbcr = (pbcr & 0x0001ffff) | gd->bd->bi_flashstart | (size_val << 17);
        mtdcr(EBC0_CFGADDR, PB1CR);
        mtdcr(EBC0_CFGDATA, pbcr);

        /* Monitor protection ON by default */
#if defined(CONFIG_KORAT_PERMANENT)
        (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
                            CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
                            flash_info + 1);
#else
        (void)flash_protect(FLAG_PROTECT_SET, CONFIG_SYS_MONITOR_BASE,
                            CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN - 1,
                            flash_info);
#endif
        /* Env protection ON by default */
        (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR,
                            CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1,
                            flash_info);
        (void)flash_protect(FLAG_PROTECT_SET, CONFIG_ENV_ADDR_REDUND,
                            CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1,
                            flash_info);

        /*
         * USB suff...
         */
        /*
         * Select the USB controller on the 440EPx ("ppc") or on the PCI bus
         * ("pci") for the CompactFlash.
         */
        if (usbcf != NULL && (strcmp(usbcf, "ppc") == 0)) {
                /*
                 * If environment variable "usbcf" is defined and set to "ppc",
                 * then connect the CompactFlash controller to the PowerPC USB
                 * port.
                 */
                printf("Attaching CompactFalsh controller to PPC USB\n");
                out_8((u8 *) CONFIG_SYS_CPLD_BASE + 0x02,
                      in_8((u8 *) CONFIG_SYS_CPLD_BASE + 0x02) | 0x10);
        } else {
                if (usbcf != NULL && (strcmp(usbcf, "pci") != 0))
                        printf("Warning: \"korat_usbcf\" is not set to a legal "
                               "value (\"ppc\" or \"pci\")\n");

                printf("Attaching CompactFalsh controller to PCI USB\n");
        }
        if (act == NULL || strcmp(act, "hostdev") == 0) {
                /* SDR Setting */
                mfsdr(SDR0_PFC1, sdr0_pfc1);
                mfsdr(SDR0_USB2D0CR, usb2d0cr);
                mfsdr(SDR0_USB2PHY0CR, usb2phy0cr);
                mfsdr(SDR0_USB2H0CR, usb2h0cr);

                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_XOCLK_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_XOCLK_EXTERNAL;
                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_WDINT_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_WDINT_16BIT_30MHZ;
                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_DVBUS_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_DVBUS_PURDIS;
                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_DWNSTR_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_DWNSTR_HOST;
                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_UTMICN_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_UTMICN_HOST;

                /*
                 * An 8-bit/60MHz interface is the only possible alternative
                 * when connecting the Device to the PHY
                 */
                usb2h0cr = usb2h0cr &~SDR0_USB2H0CR_WDINT_MASK;
                usb2h0cr = usb2h0cr | SDR0_USB2H0CR_WDINT_16BIT_30MHZ;

                /*
                 * To enable the USB 2.0 Device function
                 * through the UTMI interface
                 */
                usb2d0cr = usb2d0cr &~SDR0_USB2D0CR_USB2DEV_EBC_SEL_MASK;
                usb2d0cr = usb2d0cr | SDR0_USB2D0CR_USB2DEV_SELECTION;

                sdr0_pfc1 = sdr0_pfc1 &~SDR0_PFC1_UES_MASK;
                sdr0_pfc1 = sdr0_pfc1 | SDR0_PFC1_UES_USB2D_SEL;

                mtsdr(SDR0_PFC1, sdr0_pfc1);
                mtsdr(SDR0_USB2D0CR, usb2d0cr);
                mtsdr(SDR0_USB2PHY0CR, usb2phy0cr);
                mtsdr(SDR0_USB2H0CR, usb2h0cr);

                /* clear resets */
                udelay(1000);
                mtsdr(SDR0_SRST1, 0x00000000);
                udelay(1000);
                mtsdr(SDR0_SRST0, 0x00000000);

                printf("USB:   Host(int phy) Device(ext phy)\n");

        } else if (strcmp(act, "dev") == 0) {
                /*-------------------PATCH-------------------------------*/
                mfsdr(SDR0_USB2PHY0CR, usb2phy0cr);

                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_XOCLK_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_XOCLK_EXTERNAL;
                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_DVBUS_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_DVBUS_PURDIS;
                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_DWNSTR_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_DWNSTR_HOST;
                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_UTMICN_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_UTMICN_HOST;
                mtsdr(SDR0_USB2PHY0CR, usb2phy0cr);

                udelay(1000);
                mtsdr(SDR0_SRST1, 0x672c6000);

                udelay(1000);
                mtsdr(SDR0_SRST0, 0x00000080);

                udelay(1000);
                mtsdr(SDR0_SRST1, 0x60206000);

                *(unsigned int *)(0xe0000350) = 0x00000001;

                udelay(1000);
                mtsdr(SDR0_SRST1, 0x60306000);
                /*-------------------PATCH-------------------------------*/

                /* SDR Setting */
                mfsdr(SDR0_USB2PHY0CR, usb2phy0cr);
                mfsdr(SDR0_USB2H0CR, usb2h0cr);
                mfsdr(SDR0_USB2D0CR, usb2d0cr);
                mfsdr(SDR0_PFC1, sdr0_pfc1);

                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_XOCLK_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_XOCLK_EXTERNAL;
                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_WDINT_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_WDINT_8BIT_60MHZ;
                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_DVBUS_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_DVBUS_PUREN;
                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_DWNSTR_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_DWNSTR_DEV;
                usb2phy0cr = usb2phy0cr &~SDR0_USB2PHY0CR_UTMICN_MASK;
                usb2phy0cr = usb2phy0cr | SDR0_USB2PHY0CR_UTMICN_DEV;

                usb2h0cr   = usb2h0cr &~SDR0_USB2H0CR_WDINT_MASK;
                usb2h0cr   = usb2h0cr | SDR0_USB2H0CR_WDINT_8BIT_60MHZ;

                usb2d0cr = usb2d0cr &~SDR0_USB2D0CR_USB2DEV_EBC_SEL_MASK;
                usb2d0cr = usb2d0cr | SDR0_USB2D0CR_EBC_SELECTION;

                sdr0_pfc1 = sdr0_pfc1 &~SDR0_PFC1_UES_MASK;
                sdr0_pfc1 = sdr0_pfc1 | SDR0_PFC1_UES_EBCHR_SEL;

                mtsdr(SDR0_USB2H0CR, usb2h0cr);
                mtsdr(SDR0_USB2PHY0CR, usb2phy0cr);
                mtsdr(SDR0_USB2D0CR, usb2d0cr);
                mtsdr(SDR0_PFC1, sdr0_pfc1);

                /* clear resets */
                udelay(1000);
                mtsdr(SDR0_SRST1, 0x00000000);
                udelay(1000);
                mtsdr(SDR0_SRST0, 0x00000000);

                printf("USB:   Device(int phy)\n");
        }

        mfsdr(SDR0_SRST1, reg);         /* enable security/kasumi engines */
        reg &= ~(SDR0_SRST1_CRYP0 | SDR0_SRST1_KASU0);
        mtsdr(SDR0_SRST1, reg);

        /*
         * Clear PLB4A0_ACR[WRP]
         * This fix will make the MAL burst disabling patch for the Linux
         * EMAC driver obsolete.
         */
        reg = mfdcr(PLB4_ACR) & ~PLB4_ACR_WRP;
        mtdcr(PLB4_ACR, reg);

        set_serial_number();
        set_mac_addresses();
        gpio_write_bit(CONFIG_SYS_GPIO_ATMEGA_RESET_, 1);

        return 0;
}

int checkboard(void)
{
        char const *const s = getenv("serial#");
        u8 const rev = in_8((u8 *) CONFIG_SYS_CPLD_BASE + 0);

        printf("Board: Korat, Rev. %X", rev);
        if (s)
                printf(", serial# %s", s);

        printf(".\n       Ethernet PHY 0: ");
        if (gpio_read_out_bit(CONFIG_SYS_GPIO_PHY0_FIBER_SEL))
                printf("fiber");
        else
                printf("copper");

        printf(", PHY 1: ");
        if (gpio_read_out_bit(CONFIG_SYS_GPIO_PHY1_FIBER_SEL))
                printf("fiber");
        else
                printf("copper");

        printf(".\n");
#if defined(CONFIG_KORAT_PERMANENT)
        printf("       Executing permanent copy of U-Boot.\n");
#endif
        return 0;
}

#if defined(CONFIG_PCI) && defined(CONFIG_PCI_PNP)
/*
 * Assign interrupts to PCI devices.
 */
void korat_pci_fixup_irq(struct pci_controller *hose, pci_dev_t dev)
{
        pci_hose_write_config_byte(hose, dev, PCI_INTERRUPT_LINE, VECNUM_EIRQ2);
}
#endif

/*
 * pci_pre_init
 *
 * This routine is called just prior to registering the hose and gives
 * the board the opportunity to check things. Returning a value of zero
 * indicates that things are bad & PCI initialization should be aborted.
 *
 * Different boards may wish to customize the pci controller structure
 * (add regions, override default access routines, etc) or perform
 * certain pre-initialization actions.
 */
#if defined(CONFIG_PCI)
int pci_pre_init(struct pci_controller *hose)
{
        unsigned long addr;

        /*
         * Set priority for all PLB3 devices to 0.
         * Set PLB3 arbiter to fair mode.
         */
        mfsdr(SD0_AMP1, addr);
        mtsdr(SD0_AMP1, (addr & 0x000000FF) | 0x0000FF00);
        addr = mfdcr(PLB3_ACR);
        mtdcr(PLB3_ACR, addr | 0x80000000);

        /*
         * Set priority for all PLB4 devices to 0.
         */
        mfsdr(SD0_AMP0, addr);
        mtsdr(SD0_AMP0, (addr & 0x000000FF) | 0x0000FF00);
        addr = mfdcr(PLB4_ACR) | 0xa0000000;    /* Was 0x8---- */
        mtdcr(PLB4_ACR, addr);

        /*
         * Set Nebula PLB4 arbiter to fair mode.
         */
        /* Segment0 */
        addr = (mfdcr(PLB0_ACR) & ~PLB0_ACR_PPM_MASK) | PLB0_ACR_PPM_FAIR;
        addr = (addr & ~PLB0_ACR_HBU_MASK) | PLB0_ACR_HBU_ENABLED;
        addr = (addr & ~PLB0_ACR_RDP_MASK) | PLB0_ACR_RDP_4DEEP;
        addr = (addr & ~PLB0_ACR_WRP_MASK) | PLB0_ACR_WRP_2DEEP;
        mtdcr(PLB0_ACR, addr);

        /* Segment1 */
        addr = (mfdcr(PLB1_ACR) & ~PLB1_ACR_PPM_MASK) | PLB1_ACR_PPM_FAIR;
        addr = (addr & ~PLB1_ACR_HBU_MASK) | PLB1_ACR_HBU_ENABLED;
        addr = (addr & ~PLB1_ACR_RDP_MASK) | PLB1_ACR_RDP_4DEEP;
        addr = (addr & ~PLB1_ACR_WRP_MASK) | PLB1_ACR_WRP_2DEEP;
        mtdcr(PLB1_ACR, addr);

#if defined(CONFIG_PCI_PNP)
        hose->fixup_irq = korat_pci_fixup_irq;
#endif

        return 1;
}
#endif /* defined(CONFIG_PCI) */

/*
 * pci_target_init
 *
 * The bootstrap configuration provides default settings for the pci
 * inbound map (PIM). But the bootstrap config choices are limited and
 * may not be sufficient for a given board.
 */
#if defined(CONFIG_PCI) && defined(CONFIG_SYS_PCI_TARGET_INIT)
void pci_target_init(struct pci_controller *hose)
{
        /*
         * Set up Direct MMIO registers
         */
        /*
         * PowerPC440EPX PCI Master configuration.
         * Map one 1Gig range of PLB/processor addresses to PCI memory space.
         * PLB address 0x80000000-0xBFFFFFFF
         *     ==> PCI address 0x80000000-0xBFFFFFFF
         * Use byte reversed out routines to handle endianess.
         * Make this region non-prefetchable.
         */
        out32r(PCIL0_PMM0MA, 0x00000000);       /* PMM0 Mask/Attribute */
                                                /* - disabled b4 setting */
        out32r(PCIL0_PMM0LA, CONFIG_SYS_PCI_MEMBASE);   /* PMM0 Local Address */
        out32r(PCIL0_PMM0PCILA,
               CONFIG_SYS_PCI_MEMBASE);         /* PMM0 PCI Low Address */
        out32r(PCIL0_PMM0PCIHA, 0x00000000);    /* PMM0 PCI High Address */
        out32r(PCIL0_PMM0MA, 0xE0000001);       /* 512M + No prefetching, */
                                                /* and enable region */

        out32r(PCIL0_PMM1MA, 0x00000000);       /* PMM0 Mask/Attribute */
                                                /* - disabled b4 setting */
        out32r(PCIL0_PMM1LA,
               CONFIG_SYS_PCI_MEMBASE + 0x20000000);    /* PMM0 Local Address */
        out32r(PCIL0_PMM1PCILA,
               CONFIG_SYS_PCI_MEMBASE + 0x20000000);    /* PMM0 PCI Low Address */
        out32r(PCIL0_PMM1PCIHA, 0x00000000);    /* PMM0 PCI High Address */
        out32r(PCIL0_PMM1MA, 0xE0000001);       /* 512M + No prefetching, */
                                                /* and enable region */

        out32r(PCIL0_PTM1MS, 0x00000001);       /* Memory Size/Attribute */
        out32r(PCIL0_PTM1LA, 0);                /* Local Addr. Reg */
        out32r(PCIL0_PTM2MS, 0);                /* Memory Size/Attribute */
        out32r(PCIL0_PTM2LA, 0);                /* Local Addr. Reg */

        /*
         * Set up Configuration registers
         */

        /* Program the board's subsystem id/vendor id */
        pci_write_config_word(0, PCI_SUBSYSTEM_VENDOR_ID,
                              CONFIG_SYS_PCI_SUBSYS_VENDORID);
        pci_write_config_word(0, PCI_SUBSYSTEM_ID, CONFIG_SYS_PCI_SUBSYS_ID);

        /* Configure command register as bus master */
        pci_write_config_word(0, PCI_COMMAND, PCI_COMMAND_MASTER);

        /* 240nS PCI clock */
        pci_write_config_word(0, PCI_LATENCY_TIMER, 1);

        /* No error reporting */
        pci_write_config_word(0, PCI_ERREN, 0);

        pci_write_config_dword(0, PCI_BRDGOPT2, 0x00000101);

        /*
         * Set up Configuration registers for on-board NEC uPD720101 USB
         * controller.
         */
        pci_write_config_dword(PCI_BDF(0x0, 0xC, 0x0), 0xE4, 0x00000020);
}
#endif /* defined(CONFIG_PCI) && defined(CONFIG_SYS_PCI_TARGET_INIT) */

#if defined(CONFIG_PCI) && defined(CONFIG_SYS_PCI_MASTER_INIT)
void pci_master_init(struct pci_controller *hose)
{
        unsigned short temp_short;

        /*
         * Write the PowerPC440 EP PCI Configuration regs.
         * Enable PowerPC440 EP to be a master on the PCI bus (PMM).
         * Enable PowerPC440 EP to act as a PCI memory target (PTM).
         */
        pci_read_config_word(0, PCI_COMMAND, &temp_short);
        pci_write_config_word(0, PCI_COMMAND,
                              temp_short | PCI_COMMAND_MASTER |
                              PCI_COMMAND_MEMORY);
}
#endif

/*
 * is_pci_host
 *
 * This routine is called to determine if a pci scan should be
 * performed. With various hardware environments (especially cPCI and
 * PPMC) it's insufficient to depend on the state of the arbiter enable
 * bit in the strap register, or generic host/adapter assumptions.
 *
 * Rather than hard-code a bad assumption in the general 440 code, the
 * 440 pci code requires the board to decide at runtime.
 *
 * Return 0 for adapter mode, non-zero for host (monarch) mode.
 */
#if defined(CONFIG_PCI)
int is_pci_host(struct pci_controller *hose)
{
        /* Korat is always configured as host. */
        return (1);
}
#endif /* defined(CONFIG_PCI) */

#if defined(CONFIG_POST)
/*
 * Returns 1 if keys pressed to start the power-on long-running tests
 * Called from board_init_f().
 */
int post_hotkeys_pressed(void)
{
        return 0;       /* No hotkeys supported */
}
#endif /* CONFIG_POST */

#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
void ft_board_setup(void *blob, bd_t *bd)
{
        u32 val[4];
        int rc;

        ft_cpu_setup(blob, bd);

        /* Fixup NOR mapping */
        val[0] = 1;                             /* chip select number */
        val[1] = 0;                             /* always 0 */
        val[2] = gd->bd->bi_flashstart;
        val[3] = gd->bd->bi_flashsize - CONFIG_SYS_FLASH0_SIZE;
        rc = fdt_find_and_setprop(blob, "/plb/opb/ebc", "ranges",
                                  val, sizeof(val), 1);
        if (rc)
                printf("Unable to update property NOR mapping, err=%s\n",
                       fdt_strerror(rc));
}
#endif /* defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP) */