/*---------------------------------------------------------------------------*
  Project:  TwlSDK - NWM - libraries
  File:     nwm_init.c

  Copyright 2007-2008 Nintendo. All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law. They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Date:: 2008-09-25#$
  $Rev: 8631 $
  $Author: sato_masaki $
 *---------------------------------------------------------------------------*/

#include <twl.h>
#include "nwm_common_private.h"
#ifdef SDK_TWL
#include "wm_common.h"
#else
#include "nwm_arm9_private.h"
#include <nitro/wm.h>
#include <nitro/os/ARM9/protectionRegion.h>
#endif

u8 nwmInitialized = 0;

/*---------------------------------------------------------------------------*
    Internal Function Definitions
 *---------------------------------------------------------------------------*/
NWMRetCode NWMi_InitCore(void* sysBuf, u32 bufSize, u8 dmaNo);
static BOOL NwmCheckEnableFlag(void);

/*---------------------------------------------------------------------------*
  Name:         NWM_Init

  Description:  Initializes the NWM library.
                Synchronous function that only initializes ARM9.

  Arguments:    sysBuf: Pointer to the buffer allocated by the caller.

                bufSize: Size of the buffer allocated by the caller.

                dmaNo: DMA number used by the NWM library

  Returns:      NWMRetCode: Returns the processing result.
 *---------------------------------------------------------------------------*/
NWMRetCode NWM_Init(void* sysBuf, u32 bufSize, u8 dmaNo)
{
    if( NWMi_CheckEnableFlag() == FALSE ) // Return an error if the TWL System Settings are configured not to use wireless
    {
        return NWM_RETCODE_NWM_DISABLE;
    }

    return NWMi_InitCore(sysBuf, bufSize, dmaNo);
}

NWMRetCode NWMi_InitCore(void* sysBuf, u32 bufSize, u8 dmaNo)
{
    OSIntrMode e;
    extern NWMArm9Buf *nwm9buf;

    SDK_COMPILER_ASSERT(sizeof(NWMArm9Buf) <= NWM_ARM9NWM_BUF_SIZE);
    SDK_COMPILER_ASSERT(sizeof(NWMArm7Buf) <= NWM_ARM7NWM_BUF_SIZE);
    SDK_COMPILER_ASSERT(sizeof(NWMStatus) <= NWM_STATUS_BUF_SIZE);
    SDK_ASSERT(bufSize >= NWM_SYSTEM_BUF_SIZE);
    
    e = OS_DisableInterrupts();

#ifdef SDK_TWL
    /* Confirms that the WM library initialization is complete */
    if (WM_CheckInitialized() == WM_ERRCODE_SUCCESS)
    {
        NWM_WARNING("WM has already been initialized.\n");
        (void)OS_RestoreInterrupts(e);
        return NWM_RETCODE_ILLEGAL_STATE;
    }
#endif

    /* Confirms that the NWM library has been initialized */
    if (nwmInitialized)
    {
        NWM_WARNING("NWM  has already been initialized.\n");
        (void)OS_RestoreInterrupts(e);
        return NWM_RETCODE_ILLEGAL_STATE;        // Initialization complete
    }

    if (sysBuf == NULL)
    {
        NWM_WARNING("Parameter \"sysBuf\" must not be NULL.\n");
        (void)OS_RestoreInterrupts(e);
        return NWM_RETCODE_INVALID_PARAM;
    }

    if (dmaNo > MI_DMA_MAX_NUM)
    {
        NWM_WARNING("Parameter \"dmaNo\" is over %d.\n", MI_DMA_MAX_NUM);
        (void)OS_RestoreInterrupts(e);
        return NWM_RETCODE_INVALID_PARAM;
    }

    if ((u32)sysBuf & 0x01f)
    {
        NWM_WARNING("Parameter \"sysBuf\" must be 32-byte aligned.\n");
        (void)OS_RestoreInterrupts(e);
        return NWM_RETCODE_INVALID_PARAM;
    }

    // Confirms whether the WM library has started on the ARM7
    PXI_Init();
    if (!PXI_IsCallbackReady(PXI_FIFO_TAG_WMW, PXI_PROC_ARM7))
    {
        NWM_WARNING("NWM library on ARM7 side is not ready yet.\n");
        (void)OS_RestoreInterrupts(e);
        return NWM_RETCODE_NWM_DISABLE;
    }

    /* Invalidate all buffer cache */
    DC_InvalidateRange(sysBuf, bufSize);
    MI_DmaClear32(dmaNo, sysBuf, bufSize);
    nwm9buf = (NWMArm9Buf *)sysBuf;
    DC_StoreRange(&nwm9buf, sizeof(nwm9buf));
    nwm9buf->NWM7 = (NWMArm7Buf *)((u32)nwm9buf + NWM_ARM9NWM_BUF_SIZE);
    nwm9buf->status = (NWMStatus *)((u32)(nwm9buf->NWM7) + NWM_ARM7NWM_BUF_SIZE);
    nwm9buf->fifo7to9 = (u32 *)((u32)(nwm9buf->status) + NWM_STATUS_BUF_SIZE);
    
    // Clears the FIFO buffer writable flag
    NWMi_ClearFifoRecvFlag();
    
    nwm9buf->dmaNo = dmaNo;
    
    // Initializes the queue for entry registration
    {
        s32     i;

        OS_InitMessageQueue(&nwm9buf->apibufQ.q, nwm9buf->apibufQ.fifo, NWM_APIBUF_NUM);
        for (i = 0; i < NWM_APIBUF_NUM; i++)
        {
            // Clears the ring buffer to the usable state
            *((u16 *)(nwm9buf->apibuf[i])) = NWM_API_REQUEST_ACCEPTED;
            DC_StoreRange(nwm9buf->apibuf[i], sizeof(u16));
            (void)OS_SendMessage(&nwm9buf->apibufQ.q, &nwm9buf->apibuf[i][0], OS_MESSAGE_BLOCK);
        }
    }
    
    // Sets FIFO receive function
    PXI_SetFifoRecvCallback(PXI_FIFO_TAG_WMW, NWMi_ReceiveFifo9);

    // Clear firmware binary information
    MI_CpuClear8(&nwm9buf->binData, sizeof(NWMBinaryData));
    
    nwmInitialized = 1;
    nwm9buf->status->state = NWM_STATE_INITIALIZED;  // As an exception, set the initial state here alone (this was originally done by the ARM7)
    // Store cache to ARM9 using part of main memory
    DC_StoreRange(nwm9buf, sizeof(NWMArm9Buf));
    DC_StoreRange(&nwmInitialized, sizeof(u8));
    (void)OS_RestoreInterrupts(e);

    return NWM_RETCODE_SUCCESS;
}

/*---------------------------------------------------------------------------*
  Name:         NWMi_CheckInitialized

  Description:  Confirms that the NWM library has been initialized.

  Arguments:    None.

  Returns:      int: Returns the processing result as an NWM_ERRCODE_* value.
 *---------------------------------------------------------------------------*/
NWMRetCode NWMi_CheckInitialized(void)
{
    // Check if initialized
    if (!nwmInitialized)
    {
//        NWM_WARNING("NWM library is not initialized yet.\n");
        return NWM_RETCODE_ILLEGAL_STATE;
    }
    return NWM_RETCODE_SUCCESS;
}

/*---------------------------------------------------------------------------*
  Name:         NWMi_CheckEnableFlag

  Description:  Checks the flag that allows wireless use, configurable from the TWL System Settings.
                This forcibly returns TRUE because the flag cannot currently be checked.

  Arguments:    None.

  Returns:      TRUE if wireless features can be used and FALSE otherwise
 *---------------------------------------------------------------------------*/
BOOL NWMi_CheckEnableFlag(void)
{
    if( OS_IsAvailableWireless() == TRUE && OS_IsForceDisableWireless() == FALSE )
    {
        return TRUE;
    }
    return FALSE;
}

/*---------------------------------------------------------------------------*
    End of file
 *---------------------------------------------------------------------------*/