| /*------------------------------------------------------------------------------ |
| * Module Name: SiITTInfoPkts |
| * |
| * Module Description: time based Info handling |
| * |
| * Copyright © 2002-2005, Silicon Image, Inc. All rights reserved. |
| * |
| * No part of this work may be reproduced, modified, distributed, transmitted, |
| * transcribed, or translated into any language or computer format, in any form |
| * or by any means without written permission of: Silicon Image, Inc., |
| * 1060 East Arques Avenue, Sunnyvale, California 94085 |
| *---------------------------------------------------------------------------- |
| */ |
| |
| #include "SiIInfoPkts.h" |
| #include "SiIGlob.h" |
| #include "SiIRXIO.h" |
| #include "SiIRXDefs.h" |
| #include "SiITrace.h" |
| |
| BYTE abOldInfoPkt[2] = { 0x00, 0x00 }; |
| |
| /*------------------------------------------------------------------------------ |
| * Function Name: siiResetACPPacketData |
| * Function Description: Clears data in ACP packet |
| * |
| * Accepts: none |
| * Returns: none |
| * Globals: none |
| *---------------------------------------------------------------------------- |
| */ |
| void siiResetACPPacketData(void) |
| { |
| abOldInfoPkt[0] = abOldInfoPkt[1] = 0; |
| } |
| |
| /*------------------------------------------------------------------------------ |
| * Function Name: CheckACPInterruptAndClearIfSet |
| * Function Description: checking Audio Code Protection Packet interrupt |
| *---------------------------------------------------------------------------- |
| */ |
| static BOOL CheckACPInterruptAndClearIfSet(void) |
| { |
| BOOL qResult = FALSE; |
| |
| if (siiReadByteHDMIRXP0(RX_HDMI_INT_ST6_ADDR) & RX_BIT_ACP_PACKET) { |
| siiWriteByteHDMIRXP0(RX_HDMI_INT_ST6_ADDR, RX_BIT_ACP_PACKET); |
| qResult = TRUE; |
| } |
| return qResult; |
| |
| } |
| /*------------------------------------------------------------------------------ |
| * Function Name: InfoACPInterruptHandler |
| * Function Description: checks ACP status |
| *---------------------------------------------------------------------------- |
| */ |
| void InfoACPInterruptHandler(void) |
| { /* SiI_RX_NewInfo_ACP */ |
| BYTE abInfoPkt[2]; |
| |
| siiReadBlockHDMIRXP1(RX_ACP_INFO_PKT_ADDR, 2, abInfoPkt); |
| |
| if (abInfoPkt[0] == ACP_Type) { |
| /* call ACP processing */ |
| if (abInfoPkt[1] > 1) { |
| /* Audio is protected */ |
| SiI_Inf.bGlobStatus |= SiI_RX_GlobalHDMI_ACP; |
| } else { |
| /* Flag repported on upper layer, |
| * Enable Digital Output |
| */ |
| SiI_Inf.bGlobStatus &= (~SiI_RX_GlobalHDMI_ACP); |
| } |
| if ((abInfoPkt[0] != abOldInfoPkt[0]) || |
| (abInfoPkt[1] != abOldInfoPkt[1])) { |
| abOldInfoPkt[0] = abInfoPkt[0]; |
| abOldInfoPkt[1] = abInfoPkt[1]; |
| SiI_Inf.bNewInfoPkts |= SiI_RX_NewInfo_ACP; |
| } |
| } |
| } |
| |
| |
| /*------------------------------------------------------------------------------ |
| * Function Name: siiTTInfoFrameHandler |
| * Function Description: switches between Info decode addresses in order |
| * to be able receive all types of Info, call checking |
| * ACP status |
| * Accepts: none |
| * Returns: none |
| * Globals: none |
| *---------------------------------------------------------------------------- |
| */ |
| void siiTTInfoFrameHandler(void) |
| { |
| if (CheckACPInterruptAndClearIfSet()) { |
| InfoACPInterruptHandler(); /* checks ACP packet */ |
| } else { |
| SiI_Inf.bGlobStatus &= (~SiI_RX_GlobalHDMI_ACP); |
| SiI_Inf.bNewInfoPkts &= (~SiI_RX_NewInfo_ACP); |
| } |
| |
| } |
| |
