//=============================================================================
//
//      smsc37c93x.c
//
//      Init code for SMSC 37C93x super IO controller
//
//=============================================================================
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// -------------------------------------------                              
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//
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//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   jskov
// Contributors:jskov
// Date:        2001-05-30
// Description: Init code for SMSC 37C93x super IO controller
//
//####DESCRIPTIONEND####
//
//=============================================================================

#include <pkgconf/hal.h>
#include CYGBLD_HAL_PLATFORM_H

#include <cyg/hal/hal_arch.h>           // SAVE/RESTORE GP macros
#include <cyg/hal/hal_io.h>             // IO macros
#include <cyg/hal/hal_intr.h>           // interrupt vectors


// From page 137+ in SMSC-37C93x.pdf
#define SMSC_CONFIG              0xb04007e0
#define SMSC_CONFIG_DATA         0xb04007e2

#define SMSC_CONFIG_DEV          0x0700
#define SMSC_CONFIG_POWER        0x2200
#define SMSC_CONFIG_ACTIVATE     0x3000
#define SMSC_CONFIG_ENTER        0x5500
#define SMSC_CONFIG_BASE_HIGH    0x6000
#define SMSC_CONFIG_BASE_LOW     0x6100
#define SMSC_CONFIG_IRQ          0x7000
#define SMSC_CONFIG_EXIT         0xaa00
#define SMSC_CONFIG_MODE         0xf000

#define SMSC_CONFIG_DEV_COM1     0x0400
#define SMSC_CONFIG_DEV_COM2     0x0500

#define SMSC_CONFIG_MODE_HIGH    0x0200

#define SMSC_CONFIG_ACTIVATE_ENABLE 0x0100

#define SMSC_CONFIG_POWER_COM1   0x1000
#define SMSC_CONFIG_POWER_COM2   0x2000

void
cyg_hal_init_superIO(void)
{
    // Note: two writes unlike the 37m81x!
    HAL_WRITE_UINT16(SMSC_CONFIG, SMSC_CONFIG_ENTER);
    HAL_WRITE_UINT16(SMSC_CONFIG, SMSC_CONFIG_ENTER);

    // Power ON COM1
    HAL_WRITE_UINT16(SMSC_CONFIG_POWER, SMSC_CONFIG_POWER_COM1);

    // Configure and enable COM1
    HAL_WRITE_UINT16(SMSC_CONFIG, SMSC_CONFIG_DEV);
    HAL_WRITE_UINT16(SMSC_CONFIG_DATA, SMSC_CONFIG_DEV_COM1);

    HAL_WRITE_UINT16(SMSC_CONFIG, SMSC_CONFIG_BASE_HIGH);
    HAL_WRITE_UINT16(SMSC_CONFIG_DATA, 0x0300);
    HAL_WRITE_UINT16(SMSC_CONFIG, SMSC_CONFIG_BASE_LOW);
    HAL_WRITE_UINT16(SMSC_CONFIG_DATA, 0xf800);

    // Select IRQ 4 (see chap 8. Interrupt Controller)
    HAL_WRITE_UINT16(SMSC_CONFIG, SMSC_CONFIG_IRQ);
    HAL_WRITE_UINT16(SMSC_CONFIG_DATA, 4<<8);

    HAL_WRITE_UINT16(SMSC_CONFIG, SMSC_CONFIG_MODE);
    HAL_WRITE_UINT16(SMSC_CONFIG_DATA, SMSC_CONFIG_MODE_HIGH);

    HAL_WRITE_UINT16(SMSC_CONFIG, SMSC_CONFIG_ACTIVATE);
    HAL_WRITE_UINT16(SMSC_CONFIG_DATA, SMSC_CONFIG_ACTIVATE_ENABLE);

    // Exit setup mode
    HAL_WRITE_UINT16(SMSC_CONFIG, SMSC_CONFIG_EXIT);
}

//-----------------------------------------------------------------------------
// end of smsc37c93x.c