static int Int4Isr( void )
{
uint8_t int4Status;
int4Status = SiiRegRead(REG_INTR4);
if(!int4Status)
{
}
else if(0xFF == int4Status)
{
return I2C_INACCESSIBLE;
}else
{
TX_DEBUG_PRINT(("INT4 Status = %02X\n", (int) int4Status));
if(int4Status & BIT0)
{
ProcessScdtStatusChange();
}
if(int4Status & BIT2)
{
MhlTxDrvProcessConnection();
}
else if(int4Status & BIT3)
{
TX_DEBUG_PRINT(("uUSB-A type device detected.\n"));
SiiRegWrite(REG_DISC_STAT2, 0x80);
SwitchToD3();
return I2C_INACCESSIBLE;
}
if (int4Status & BIT5)
{
MhlTxDrvProcessDisconnection();
return I2C_INACCESSIBLE;
}
if((POWER_STATE_D0_MHL != fwPowerState) && (int4Status & BIT6))
{
SwitchToD0();
ProcessRgnd();
}
if(fwPowerState != POWER_STATE_D3)
{
if (int4Status & BIT4)
{
TX_DEBUG_PRINT(("CBus Lockout\n"));
ForceUsbIdSwitchOpen();
ReleaseUsbIdSwitchOpen();
}
}
}
SiiRegWrite(REG_INTR4, int4Status);
return I2C_ACCESSIBLE;
}
////////////////////////////////////////////////////////////////////
// Int4Isr
//
//
// Look for interrupts on INTR4 (Register 0x74)
// 7 = RSVD (reserved)
// 6 = RGND Rdy (interested)
// 5 = VBUS Low (ignore)
// 4 = CBUS LKOUT (interested)
// 3 = USB EST (interested)
// 2 = MHL EST (interested)
// 1 = RPWR5V Change (ignore)
// 0 = SCDT Change (interested during D0)
////////////////////////////////////////////////////////////////////
static int Int4Isr (void)
{
uint8_t int4Status;
int4Status = SiiRegRead(REG_INT_CTRL); // read status
if( int4Status )
{
TX_DEBUG_PRINT(("Drv: int4Status test: 0x%02X\n", (int) int4Status));
}
int4Status = SiiRegRead(REG_INTR4); // read status
if( int4Status )
{
TX_DEBUG_PRINT(("Drv: int4Status: 0x%02X\n", (int) int4Status));
}
// When I2C is inoperational (D3) and a previous interrupt brought us here, do nothing.
if(0xFF == int4Status || 0x87 == int4Status|| 0x38 == int4Status)
{
return I2C_INACCESSIBLE;
}
if((int4Status & BIT0)&&( POWER_STATE_D0_MHL == fwPowerState )) // SCDT Status Change
{
//if (g_chipRevId < 1)
ProcessScdtStatusChange();
}
// process MHL_EST interrupt
if(int4Status & BIT2) // MHL_EST_INT
{
MhlTxDrvProcessConnection();
}
// process USB_EST interrupt
else if(int4Status & BIT3)
{
TX_DEBUG_PRINT(("Drv: uUSB-A type device detected.\n"));
SiiRegWrite(REG_DISC_STAT2, 0x80); // Exit D3 via CBUS falling edge
SwitchToD3();
return I2C_INACCESSIBLE;
}
if (int4Status & BIT5)
{
MhlTxDrvProcessDisconnection();
return I2C_INACCESSIBLE;
}
if((POWER_STATE_D0_MHL != fwPowerState) && (int4Status & BIT6))
{
// Switch to full power mode.
SwitchToD0();
//
// If a sink is connected but not powered on, this interrupt can keep coming
// Determine when to go back to sleep. Say after 1 second of this state.
//
// Check RGND register and send wake up pulse to the peer
//
ProcessRgnd();
}
// Can't succeed at these in D3
if(fwPowerState != POWER_STATE_D3)
{
// CBUS Lockout interrupt?
if (int4Status & BIT4)
{
TX_DEBUG_PRINT(("Drv: CBus Lockout\n"));
SwitchToD0();
ForceUsbIdSwitchOpen();
ReleaseUsbIdSwitchOpen();
SwitchToD3();
}
}
SiiRegWrite(REG_INTR4, int4Status); // clear all interrupts
return I2C_ACCESSIBLE;
}
