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//=============================================================================

//

//      dreamcast_pci.c

//

//      Dreamcast PCI code 

//

//=============================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos 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

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//

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// 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 eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

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// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//=============================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):   t@keshi.org

// Contributors:t@keshi.org

// Date:        2001-07-30

// Purpose:     Dreamcast PCI code

//              

//####DESCRIPTIONEND####

//

//=============================================================================

#include <pkgconf/hal.h>

#include <pkgconf/system.h>

#include CYGBLD_HAL_PLATFORM_H

#include CYGHWR_MEMORY_LAYOUT_H

#include <cyg/infra/cyg_type.h>         // base types

#include <cyg/infra/cyg_trac.h>         // tracing macros

#include <cyg/infra/cyg_ass.h>          // assertion macros

#include <cyg/hal/hal_io.h>             // IO macros

#include <cyg/hal/hal_if.h>             // calling interface API

#include <cyg/hal/hal_arch.h>           // Register state info

#include <cyg/hal/hal_diag.h>

#include <cyg/hal/hal_intr.h>           // Interrupt names

#include <cyg/hal/hal_cache.h>

#include <cyg/io/pci_hw.h>

#include <cyg/io/pci.h>

#define GAPSPCI_REGS            0xa1001400

#define GAPSPCI_DMA_BASE        0x01840000

#define GAPSPCI_DMA_SIZE        32768

#define GAPSPCI_BBA_CONFIG      0xa1001600

#define GAPSPCI_INTC            0xa05f6924

static cyg_bool gapspci_initialized;

void cyg_hal_plf_pci_init(void)

{

        int i;

        cyg_uint32 val;

#if 0

        char idbuf[16];

        for(i=0; i<16; i++)

                HAL_READ_UINT8(GAPSPCI_REGS+i, idbuf[i]);

        if(strncmp(idbuf, "GAPSPCI_BRIDGE_2", 16))

                return;

#endif

        gapspci_initialized = false;

        HAL_WRITE_UINT32(GAPSPCI_REGS+0x18, 0x5a14a501);

        for(i=0; i<1000000; i++);

        HAL_READ_UINT32(GAPSPCI_REGS+0x18, val);

        if (val != 1) return;

        HAL_WRITE_UINT32(GAPSPCI_REGS+0x20, 0x01000000);

        HAL_WRITE_UINT32(GAPSPCI_REGS+0x24, 0x01000000);

        HAL_WRITE_UINT32(GAPSPCI_REGS+0x28, GAPSPCI_DMA_BASE);

        HAL_WRITE_UINT32(GAPSPCI_REGS+0x2c, GAPSPCI_DMA_BASE+GAPSPCI_DMA_SIZE);

        HAL_WRITE_UINT32(GAPSPCI_REGS+0x14, 1);

        HAL_WRITE_UINT32(GAPSPCI_REGS+0x34, 1);

#if 1

        /* Setting up Broadband Adapter */

        HAL_WRITE_UINT16(GAPSPCI_BBA_CONFIG+0x06, 0xf900);

        HAL_WRITE_UINT32(GAPSPCI_BBA_CONFIG+0x30, 0x00000000);

        HAL_WRITE_UINT8 (GAPSPCI_BBA_CONFIG+0x3c, 0x00);

        HAL_WRITE_UINT8 (GAPSPCI_BBA_CONFIG+0x0d, 0xf0);

        HAL_WRITE_UINT16(GAPSPCI_BBA_CONFIG+0x04, 0x0006);

        HAL_WRITE_UINT32(GAPSPCI_BBA_CONFIG+0x10, 0x00002001);

        HAL_WRITE_UINT32(GAPSPCI_BBA_CONFIG+0x14, 0x01000000);

#endif

        /* Enable interrupt */

        HAL_READ_UINT32(GAPSPCI_INTC, val);

        val |= (1<<3);

        HAL_WRITE_UINT32(GAPSPCI_INTC, val);

        gapspci_initialized = true;

}

#define BBA_SELECTED(bus, devfn) (bus==0 && devfn==0)

cyg_uint32 cyg_hal_plf_pci_cfg_read_dword (cyg_uint32 bus,

                                           cyg_uint32 devfn,

                                           cyg_uint32 offset)

{

        cyg_uint32 val;

        if (!gapspci_initialized || !BBA_SELECTED(bus, devfn))

                return 0xffffffff;

        HAL_READ_UINT32(GAPSPCI_BBA_CONFIG+offset, val);

        return val;

}

cyg_uint16 cyg_hal_plf_pci_cfg_read_word  (cyg_uint32 bus,

                                           cyg_uint32 devfn,

                                           cyg_uint32 offset)

{

        cyg_uint16 val;

        if (!gapspci_initialized || !BBA_SELECTED(bus, devfn))

                return 0xffff;

        HAL_READ_UINT16(GAPSPCI_BBA_CONFIG+offset, val);

        return val;

}

cyg_uint8 cyg_hal_plf_pci_cfg_read_byte   (cyg_uint32 bus,

                                           cyg_uint32 devfn,

                                           cyg_uint32 offset)

{

        cyg_uint8 val;

        if (!gapspci_initialized || !BBA_SELECTED(bus, devfn))

                return 0xff;

        HAL_READ_UINT8(GAPSPCI_BBA_CONFIG+offset, val);

        return val;

}

void cyg_hal_plf_pci_cfg_write_dword (cyg_uint32 bus,

                                      cyg_uint32 devfn,

                                      cyg_uint32 offset,

                                      cyg_uint32 val)

{

        if (gapspci_initialized && BBA_SELECTED(bus, devfn))

                HAL_WRITE_UINT32(GAPSPCI_BBA_CONFIG+offset, val);

}

void cyg_hal_plf_pci_cfg_write_word  (cyg_uint32 bus,

                                      cyg_uint32 devfn,

                                      cyg_uint32 offset,

                                      cyg_uint16 val)

{

        if (gapspci_initialized && BBA_SELECTED(bus, devfn))

                HAL_WRITE_UINT16(GAPSPCI_BBA_CONFIG+offset, val);

}

void cyg_hal_plf_pci_cfg_write_byte   (cyg_uint32 bus,

                                       cyg_uint32 devfn,

                                       cyg_uint32 offset,

                                       cyg_uint8 val)

{

        if (gapspci_initialized && BBA_SELECTED(bus, devfn))

                HAL_WRITE_UINT8(GAPSPCI_BBA_CONFIG+offset, val);

}

//-----------------------------------------------------------------------------

// End of dreamcast_pci.c