/*
 * (C) Copyright 2010
 * Stefan Roese, DENX Software Engineering, sr@denx.de.
 *
 * 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/ppc440.h>
#include <libfdt.h>
#include <fdt_support.h>
#include <i2c.h>
#include <mtd/cfi_flash.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/mmu.h>
#include <asm/4xx_pcie.h>
#include <asm/ppc4xx-gpio.h>

int board_early_init_f(void)
{
        /*
         * 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, 0xffffffff);      /* 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, 0x7fffffff);      /* 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 */

        mtdcr(UIC3SR, 0xffffffff);      /* clear all */
        mtdcr(UIC3ER, 0x00000000);      /* disable all */
        mtdcr(UIC3CR, 0x00000000);      /* all non-critical */
        mtdcr(UIC3PR, 0xffffffff);      /* per ref-board manual */
        mtdcr(UIC3TR, 0x00000000);      /* per ref-board manual */
        mtdcr(UIC3VR, 0x00000000);      /* int31 highest, base=0x000 */
        mtdcr(UIC3SR, 0xffffffff);      /* clear all */

        /*
         * Configure PFC (Pin Function Control) registers
         * enable GPIO 49-63
         * UART0: 4 pins
         */
        mtsdr(SDR0_PFC0, 0x00007fff);
        mtsdr(SDR0_PFC1, 0x00040000);

        /* Enable PCI host functionality in SDR0_PCI0 */
        mtsdr(SDR0_PCI0, 0xe0000000);

        mtsdr(SDR0_SRST1, 0);   /* Pull AHB out of reset default=1 */

        /* Setup PLB4-AHB bridge based on the system address map */
        mtdcr(AHB_TOP, 0x8000004B);
        mtdcr(AHB_BOT, 0x8000004B);

        return 0;
}

int checkboard(void)
{
        char *s = getenv("serial#");

        printf("Board: T3CORP");

        if (s != NULL) {
                puts(", serial# ");
                puts(s);
        }
        putc('\n');

        return 0;
}

int board_early_init_r(void)
{
        /*
         * T3CORP has 64MBytes of NOR flash (Spansion 29GL512), but the
         * boot EBC mapping only supports a maximum of 16MBytes
         * (4.ff00.0000 - 4.ffff.ffff).
         * To solve this problem, the flash has to get remapped to another
         * EBC address which accepts bigger regions:
         *
         * 0xfn00.0000 -> 4.cn00.0000
         */

        /* Remap the NOR flash to 0xcn00.0000 ... 0xcfff.ffff */
        mtebc(PB0CR, CONFIG_SYS_FLASH_BASE_PHYS_L | EBC_BXCR_BS_64MB |
              EBC_BXCR_BU_RW | EBC_BXCR_BW_16BIT);

        /* Remove TLB entry of boot EBC mapping */
        remove_tlb(CONFIG_SYS_BOOT_BASE_ADDR, 16 << 20);

        /* Add TLB entry for 0xfn00.0000 -> 0x4.cn00.0000 */
        program_tlb(CONFIG_SYS_FLASH_BASE_PHYS, CONFIG_SYS_FLASH_BASE,
                    CONFIG_SYS_FLASH_SIZE, TLB_WORD2_I_ENABLE);

        /*
         * Now accessing of the whole 64Mbytes of NOR flash at virtual address
         * 0xfc00.0000 is possible
         */

        /*
         * Clear potential errors resulting from auto-calibration.
         * If not done, then we could get an interrupt later on when
         * exceptions are enabled.
         */
        set_mcsr(get_mcsr());

        return 0;
}

int misc_init_r(void)
{
        u32 sdr0_srst1 = 0;
        u32 eth_cfg;

        /*
         * Set EMAC mode/configuration (GMII, SGMII, RGMII...).
         * This is board specific, so let's do it here.
         */
        mfsdr(SDR0_ETH_CFG, eth_cfg);
        /* disable SGMII mode */
        eth_cfg &= ~(SDR0_ETH_CFG_SGMII2_ENABLE |
                     SDR0_ETH_CFG_SGMII1_ENABLE |
                     SDR0_ETH_CFG_SGMII0_ENABLE);
        /* Set the for 2 RGMII mode */
        /* GMC0 EMAC4_0, GMC0 EMAC4_1, RGMII Bridge 0 */
        eth_cfg &= ~SDR0_ETH_CFG_GMC0_BRIDGE_SEL;
        eth_cfg &= ~SDR0_ETH_CFG_GMC1_BRIDGE_SEL;
        mtsdr(SDR0_ETH_CFG, eth_cfg);

        /*
         * The AHB Bridge core is held in reset after power-on or reset
         * so enable it now
         */
        mfsdr(SDR0_SRST1, sdr0_srst1);
        sdr0_srst1 &= ~SDR0_SRST1_AHB;
        mtsdr(SDR0_SRST1, sdr0_srst1);

        return 0;
}

int board_pcie_last(void)
{
        /*
         * Only PCIe0 for now, PCIe1 hangs on this board
         */
        return 0;
}

/*
 * Board specific WRDTR and CLKTR values used by the auto-
 * calibration code (4xx_ibm_ddr2_autocalib.c).
 */
static struct sdram_timing board_scan_options[] = {
        {1, 2},
        {-1, -1}
};

struct sdram_timing *ddr_scan_option(struct sdram_timing *default_val)
{
        return board_scan_options;
}

/*
 * Accessor functions replacing the "weak" functions in
 * drivers/mtd/cfi_flash.c
 *
 * The NOR flash devices "behind" the FPGA's (Xilinx DS617)
 * can only be read correctly in 16bit mode. We need to emulate
 * 8bit and 32bit reads here in the board specific code.
 */
u8 flash_read8(void *addr)
{
        u16 val = __raw_readw((void *)((u32)addr & ~1));

        if ((u32)addr & 1)
                return val;

        return val >> 8;
}

u32 flash_read32(void *addr)
{
        return (__raw_readw(addr) << 16) | __raw_readw((void *)((u32)addr + 2));
}

void flash_cmd_reset(flash_info_t *info)
{
        /*
         * FLASH at address CONFIG_SYS_FLASH_BASE is a Spansion chip and
         * needs the Spansion type reset commands. The other flash chip
         * is located behind a FPGA (Xilinx DS617) and needs the Intel type
         * reset command.
         */
        if (info->start[0] == CONFIG_SYS_FLASH_BASE)
                flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
        else
                flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
}