/*
 * (C) Copyright 2001-2004
 * Stefan Roese, esd gmbh germany, stefan.roese@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 <command.h>
#include <malloc.h>
#include <pci.h>
#include <asm/4xx_pci.h>
#include <asm/io.h>

#include "pci405.h"

DECLARE_GLOBAL_DATA_PTR;

/* Prototypes */
unsigned long fpga_done_state(void);
unsigned long fpga_init_state(void);

#if 0
#define FPGA_DEBUG
#endif

/* predefine these here */
#define FPGA_DONE_STATE (fpga_done_state())
#define FPGA_INIT_STATE (fpga_init_state())

/* fpga configuration data - generated by bin2cc */
const unsigned char fpgadata[] =
{
#include "fpgadata.c"
};

/*
 * include common fpga code (for esd boards)
 */
#include "../common/fpga.c"

#define FPGA_DONE_STATE_V11 (in_be32((void*)GPIO0_IR) & CONFIG_SYS_FPGA_DONE)
#define FPGA_DONE_STATE_V12 (in_be32((void*)GPIO0_IR) & CONFIG_SYS_FPGA_DONE_V12)

#define FPGA_INIT_STATE_V11 (in_be32((void*)GPIO0_IR) & CONFIG_SYS_FPGA_INIT)
#define FPGA_INIT_STATE_V12 (in_be32((void*)GPIO0_IR) & CONFIG_SYS_FPGA_INIT_V12)


int board_revision(void)
{
        unsigned long CPC0_CR0Reg;
        unsigned long value;

        /*
         * Get version of PCI405 board from GPIO's
         */

        /*
         * Setup GPIO pins (CS2/GPIO11 and CS3/GPIO12 as GPIO)
         */
        CPC0_CR0Reg = mfdcr(CPC0_CR0);
        mtdcr(CPC0_CR0, CPC0_CR0Reg | 0x03000000);
        out_be32((void*)GPIO0_ODR, in_be32((void*)GPIO0_ODR) & ~0x00100200);
        out_be32((void*)GPIO0_TCR, in_be32((void*)GPIO0_TCR) & ~0x00100200);
        udelay(1000);                   /* wait some time before reading input */
        value = in_be32((void*)GPIO0_IR) & 0x00100200;       /* get config bits */

        /*
         * Restore GPIO settings
         */
        mtdcr(CPC0_CR0, CPC0_CR0Reg);

        switch (value) {
        case 0x00100200:
                /* CS2==1 && IRQ5==1 -> version 1.0 and 1.1 */
                return 1;
        case 0x00000200:
                /* CS2==0 && IRQ5==1 -> version 1.2 */
                return 2;
        case 0x00000000:
                /* CS2==0 && IRQ5==0 -> version 1.3 */
                return 3;
#if 0 /* not yet manufactured ! */
        case 0x00100000:
                /* CS2==1 && IRQ5==0 -> version 1.4 */
                return 4;
#endif
        default:
                /* should not be reached! */
                return 0;
        }
}


unsigned long fpga_done_state(void)
{
        if (gd->board_type < 2) {
                return FPGA_DONE_STATE_V11;
        } else {
                return FPGA_DONE_STATE_V12;
        }
}


unsigned long fpga_init_state(void)
{
        if (gd->board_type < 2) {
                return FPGA_INIT_STATE_V11;
        } else {
                return FPGA_INIT_STATE_V12;
        }
}


int board_early_init_f (void)
{
        unsigned long CPC0_CR0Reg;

        /*
         * First pull fpga-prg pin low, to disable fpga logic (on version 1.2 board)
         */
        out_be32((void*)GPIO0_ODR, 0x00000000);        /* no open drain pins      */
        out_be32((void*)GPIO0_TCR, CONFIG_SYS_FPGA_PRG);      /* setup for output        */
        out_be32((void*)GPIO0_OR,  CONFIG_SYS_FPGA_PRG);      /* set output pins to high */
        out_be32((void*)GPIO0_OR, 0);                  /* pull prg low            */

        /*
         * 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) CAN1; active low; level sensitive
         * IRQ 27 (EXT IRQ 2) CAN2; active low; level sensitive
         * IRQ 28 (EXT IRQ 3) CAN3; active low; level sensitive
         * IRQ 29 (EXT IRQ 4) unused; active low; level sensitive
         * IRQ 30 (EXT IRQ 5) FPGA Timestamp; active low; level sensitive
         * IRQ 31 (EXT IRQ 6) PCI Reset; active low; 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 */

        /*
         * Setup GPIO pins (IRQ4/GPIO21 as GPIO)
         */
        CPC0_CR0Reg = mfdcr(CPC0_CR0);
        mtdcr(CPC0_CR0, CPC0_CR0Reg | 0x00008000);

        /*
         * Setup GPIO pins (CS6+CS7 as GPIO)
         */
        mtdcr(CPC0_CR0, CPC0_CR0Reg | 0x00300000);

        /*
         * EBC Configuration Register: set ready timeout to 512 ebc-clks -> ca. 25 us
         */
        mtebc (EBC0_CFG, 0xa8400000); /* ebc always driven */

        return 0;
}

int misc_init_r (void)
{
        unsigned char *dst;
        ulong len = sizeof(fpgadata);
        int status;
        int index;
        int i;
        unsigned int *ptr;
        unsigned int *magic;

        /*
         * On PCI-405 the environment is saved in eeprom!
         * FPGA can be gzip compressed (malloc) and booted this late.
         */

        dst = malloc(CONFIG_SYS_FPGA_MAX_SIZE);
        if (gunzip (dst, CONFIG_SYS_FPGA_MAX_SIZE, (uchar *)fpgadata, &len) != 0) {
                printf ("GUNZIP ERROR - must RESET board to recover\n");
                do_reset (NULL, 0, 0, NULL);
        }

        status = fpga_boot(dst, len);
        if (status != 0) {
                printf("\nFPGA: Booting failed ");
                switch (status) {
                case ERROR_FPGA_PRG_INIT_LOW:
                        printf("(Timeout: INIT not low after asserting PROGRAM*)\n ");
                        break;
                case ERROR_FPGA_PRG_INIT_HIGH:
                        printf("(Timeout: INIT not high after deasserting PROGRAM*)\n ");
                        break;
                case ERROR_FPGA_PRG_DONE:
                        printf("(Timeout: DONE not high after programming FPGA)\n ");
                        break;
                }

                /* display infos on fpgaimage */
                index = 15;
                for (i=0; i<4; i++) {
                        len = dst[index];
                        printf("FPGA: %s\n", &(dst[index+1]));
                        index += len+3;
                }
                putc ('\n');
                /* delayed reboot */
                for (i=20; i>0; i--) {
                        printf("Rebooting in %2d seconds \r",i);
                        for (index=0;index<1000;index++)
                                udelay(1000);
                }
                putc ('\n');
                do_reset(NULL, 0, 0, NULL);
        }

        puts("FPGA:  ");

        /* display infos on fpgaimage */
        index = 15;
        for (i=0; i<4; i++) {
                len = dst[index];
                printf("%s ", &(dst[index+1]));
                index += len+3;
        }
        putc ('\n');

        /*
         * Reset FPGA via FPGA_DATA pin
         */
        SET_FPGA(FPGA_PRG | FPGA_CLK);
        udelay(1000); /* wait 1ms */
        SET_FPGA(FPGA_PRG | FPGA_CLK | FPGA_DATA);
        udelay(1000); /* wait 1ms */

        /*
         * Check if magic for pci reconfig is written
         */
        magic = (unsigned int *)0x00000004;
        if (*magic == PCI_RECONFIG_MAGIC) {
                /*
                 * Rewrite pci config regs (only after soft-reset with magic set)
                 */
                ptr = (unsigned int *)PCI_REGS_ADDR;
                if (crc32(0, (uchar *)PCI_REGS_ADDR+4, PCI_REGS_LEN-4) == *ptr) {
                        puts("Restoring PCI Configurations Regs!\n");
                        ptr = (unsigned int *)PCI_REGS_ADDR + 1;
                        for (i=0; i<0x40; i+=4) {
                                pci_write_config_dword(PCIDEVID_405GP, i, *ptr++);
                        }
                }
                mtdcr(UIC0SR, 0xFFFFFFFF);        /* clear all ints */

                *magic = 0;      /* clear pci reconfig magic again */
        }

        /*
         * Decrease PLB latency timeout and reduce priority of the PCI bridge master
         */
#define PCI0_BRDGOPT1 0x4a
        pci_write_config_word(PCIDEVID_405GP, PCI0_BRDGOPT1, 0x3f20);

        /*
         * Enable fairness and high bus utilization
         */
        mtdcr(PLB0_ACR, 0x98000000);

        free(dst);
        return (0);
}


/*
 * Check Board Identity:
 */
int checkboard (void)
{
        char str[64];
        int i = getenv_f("serial#", str, sizeof(str));

        puts ("Board: ");

        if (i == -1) {
                puts ("### No HW ID - assuming PCI405");
        } else {
                puts (str);
        }

        gd->board_type = board_revision();
        printf(" (Rev 1.%ld", gd->board_type);

        if (gd->board_type >= 2) {
                unsigned long CPC0_CR0Reg;
                unsigned long value;

                /*
                 * Setup GPIO pins (Trace/GPIO1 to GPIO)
                 */
                CPC0_CR0Reg = mfdcr(CPC0_CR0);
                mtdcr(CPC0_CR0, CPC0_CR0Reg & ~0x08000000);
                out_be32((void*)GPIO0_ODR, in_be32((void*)GPIO0_ODR) & ~0x40000000);
                out_be32((void*)GPIO0_TCR, in_be32((void*)GPIO0_TCR) & ~0x40000000);
                udelay(1000);                   /* wait some time before reading input */
                value = in_be32((void*)GPIO0_IR) & 0x40000000;       /* get config bits */
                if (value) {
                        puts(", 33 MHz PCI");
                } else {
                        puts(", 66 MHz PCI");
                }
        }

        puts(")\n");

        return 0;
}

/* ------------------------------------------------------------------------- */
#define UART1_MCR 0xef600404
int wpeeprom(int wp)
{
        int wp_state = wp;

        if (wp == 1) {
                out_8((void *)UART1_MCR, in_8((void *)UART1_MCR) & ~0x02);
        } else if (wp == 0) {
                out_8((void *)UART1_MCR, in_8((void *)UART1_MCR) | 0x02);
        } else {
                if (in_8((void *)UART1_MCR) & 0x02) {
                        wp_state = 0;
                } else {
                        wp_state = 1;
                }
        }
        return wp_state;
}

int do_wpeeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
        int wp = -1;
        if (argc >= 2) {
                if (argv[1][0] == '1') {
                        wp = 1;
                } else if (argv[1][0] == '0') {
                        wp = 0;
                }
        }

        wp = wpeeprom(wp);
        printf("EEPROM write protection %s\n", wp ? "ENABLED" : "DISABLED");
        return 0;
}

U_BOOT_CMD(
        wpeeprom,       2,      1,      do_wpeeprom,
        "Check/Enable/Disable I2C EEPROM write protection",
        "wpeeprom\n"
        "    - check I2C EEPROM write protection state\n"
        "wpeeprom 1\n"
        "    - enable I2C EEPROM write protection\n"
        "wpeeprom 0\n"
        "    - disable I2C EEPROM write protection"
);