/*
 * (C) Copyright 2005-2007
 * Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 <asm/processor.h>
#include <asm/io.h>
#include <command.h>
#include <malloc.h>

DECLARE_GLOBAL_DATA_PTR;

extern void lxt971_no_sleep(void);

int board_early_init_f (void)
{
        /*
         * IRQ 0-15  405GP internally generated; active high; level sensitive
         * IRQ 16    405GP internally generated; active low; level sensitive
         * IRQ 17-24 RESERVED
         * IRQ 25 (EXT IRQ 0) CAN0; active low; level sensitive
         * IRQ 26 (EXT IRQ 1) SER0 ; active low; level sensitive
         * IRQ 27 (EXT IRQ 2) SER1; active low; level sensitive
         * IRQ 28 (EXT IRQ 3) FPGA 0; active low; level sensitive
         * IRQ 29 (EXT IRQ 4) FPGA 1; active low; level sensitive
         * IRQ 30 (EXT IRQ 5) PCI INTA; active low; level sensitive
         * IRQ 31 (EXT IRQ 6) COMPACT FLASH; active high; level sensitive
         */
        mtdcr(UIC0SR, 0xFFFFFFFF);       /* clear all ints */
        mtdcr(UIC0ER, 0x00000000);       /* disable all ints */
        mtdcr(UIC0CR, 0x00000000);       /* set all to be non-critical*/
        mtdcr(UIC0PR, 0xFFFFFF80);       /* set int polarities */
        mtdcr(UIC0TR, 0x10000000);       /* set int trigger levels */
        mtdcr(UIC0VCR, 0x00000001);      /* set vect base=0,INT0 highest priority*/
        mtdcr(UIC0SR, 0xFFFFFFFF);       /* clear all ints */

        /*
         * EBC Configuration Register: set ready timeout to 512 ebc-clks -> ca. 15 us
         */
        mtebc (EBC0_CFG, 0xa8400000); /* ebc always driven */

        /*
         * Reset CPLD via GPIO12 (CS3) pin
         */
        out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_PLD_RESET);
        udelay(1000); /* wait 1ms */
        out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_PLD_RESET);
        udelay(1000); /* wait 1ms */

        return 0;
}

int misc_init_r (void)
{
        /* adjust flash start and offset */
        gd->bd->bi_flashstart = 0 - gd->bd->bi_flashsize;
        gd->bd->bi_flashoffset = 0;

        /*
         * Setup and enable EEPROM write protection
         */
        out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_EEPROM_WP);

        return (0);
}


/*
 * Check Board Identity:
 */
#define LED_REG (CONFIG_SYS_PLD_BASE + 0x1000)
int checkboard (void)
{
        char str[64];
        int flashcnt;
        int delay;

        puts ("Board: ");

        if (getenv_f("serial#", str, sizeof(str))  == -1) {
                puts ("### No HW ID - assuming CMS700");
        } else {
                puts(str);
        }

        printf(" (PLD-Version=%02d)\n",
               in_8((void *)(CONFIG_SYS_PLD_BASE + 0x1001)));

        /*
         * Flash LEDs
         */
        for (flashcnt = 0; flashcnt < 3; flashcnt++) {
                out_8((void *)LED_REG, 0x00); /* LEDs off */
                for (delay = 0; delay < 100; delay++)
                        udelay(1000);
                out_8((void *)LED_REG, 0x0f); /* LEDs on */
                for (delay = 0; delay < 50; delay++)
                        udelay(1000);
        }
        out_8((void *)LED_REG, 0x70);

        return 0;
}

/* ------------------------------------------------------------------------- */

#if defined(CONFIG_SYS_EEPROM_WREN)
/* Input: <dev_addr>  I2C address of EEPROM device to enable.
 *         <state>     -1: deliver current state
 *                     0: disable write
 *                     1: enable write
 *  Returns:           -1: wrong device address
 *                      0: dis-/en- able done
 *                   0/1: current state if <state> was -1.
 */
int eeprom_write_enable (unsigned dev_addr, int state)
{
        if (CONFIG_SYS_I2C_EEPROM_ADDR != dev_addr) {
                return -1;
        } else {
                switch (state) {
                case 1:
                        /* Enable write access, clear bit GPIO_SINT2. */
                        out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_EEPROM_WP);
                        state = 0;
                        break;
                case 0:
                        /* Disable write access, set bit GPIO_SINT2. */
                        out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_EEPROM_WP);
                        state = 0;
                        break;
                default:
                        /* Read current status back. */
                        state = (0 == (in_be32((void *)GPIO0_OR) & CONFIG_SYS_EEPROM_WP));
                        break;
                }
        }
        return state;
}

int do_eep_wren (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
        int query = argc == 1;
        int state = 0;

        if (query) {
                /* Query write access state. */
                state = eeprom_write_enable (CONFIG_SYS_I2C_EEPROM_ADDR, -1);
                if (state < 0) {
                        puts ("Query of write access state failed.\n");
                } else {
                        printf ("Write access for device 0x%0x is %sabled.\n",
                                CONFIG_SYS_I2C_EEPROM_ADDR, state ? "en" : "dis");
                        state = 0;
                }
        } else {
                if ('0' == argv[1][0]) {
                        /* Disable write access. */
                        state = eeprom_write_enable (CONFIG_SYS_I2C_EEPROM_ADDR, 0);
                } else {
                        /* Enable write access. */
                        state = eeprom_write_enable (CONFIG_SYS_I2C_EEPROM_ADDR, 1);
                }
                if (state < 0) {
                        puts ("Setup of write access state failed.\n");
                }
        }

        return state;
}

U_BOOT_CMD(eepwren,     2,      0,      do_eep_wren,
        "Enable / disable / query EEPROM write access",
        ""
);
#endif /* #if defined(CONFIG_SYS_EEPROM_WREN) */

/* ------------------------------------------------------------------------- */

void reset_phy(void)
{
#ifdef CONFIG_LXT971_NO_SLEEP

        /*
         * Disable sleep mode in LXT971
         */
        lxt971_no_sleep();
#endif
}