From 02b1a085fcb5bbabc4a9148daba91c3dc0a798f8 Mon Sep 17 00:00:00 2001
From: notaz <notasas@gmail.com>
Date: Sun, 29 Oct 2023 01:19:32 +0300
Subject: [PATCH] cdrom: allow resetting with lid open

libretro/pcsx_rearmed#679
---
 libpcsxcore/cdriso.c  | 1 -
 libpcsxcore/cdrom.c   | 8 +++++++-
 libpcsxcore/misc.c    | 9 ++++++++-
 libpcsxcore/misc.h    | 2 +-
 libpcsxcore/plugins.h | 2 ++
 libpcsxcore/r3000a.c  | 3 +--
 6 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/libpcsxcore/cdriso.c b/libpcsxcore/cdriso.c
index 660d109c..ecf42409 100644
--- a/libpcsxcore/cdriso.c
+++ b/libpcsxcore/cdriso.c
@@ -103,7 +103,6 @@ long CALLBACK CDR__configure(void);
 long CALLBACK CDR__test(void);
 void CALLBACK CDR__about(void);
 long CALLBACK CDR__setfilename(char *filename);
-long CALLBACK CDR__getStatus(struct CdrStat *stat);
 
 static void DecodeRawSubData(void);
 
diff --git a/libpcsxcore/cdrom.c b/libpcsxcore/cdrom.c
index 99e8dcd6..6f4e3eb4 100644
--- a/libpcsxcore/cdrom.c
+++ b/libpcsxcore/cdrom.c
@@ -1694,7 +1694,13 @@ void cdrReset() {
 	cdr.Reg2 = 0x1f;
 	cdr.Stat = NoIntr;
 	cdr.FifoOffset = DATA_SIZE; // fifo empty
-	if (CdromId[0] == '\0') {
+
+	CDR_getStatus(&stat);
+	if (stat.Status & STATUS_SHELLOPEN) {
+		cdr.DriveState = DRIVESTATE_LID_OPEN;
+		cdr.StatP = STATUS_SHELLOPEN;
+	}
+	else if (CdromId[0] == '\0') {
 		cdr.DriveState = DRIVESTATE_STOPPED;
 		cdr.StatP = 0;
 	}
diff --git a/libpcsxcore/misc.c b/libpcsxcore/misc.c
index 526ebd43..f175e2a3 100644
--- a/libpcsxcore/misc.c
+++ b/libpcsxcore/misc.c
@@ -163,12 +163,19 @@ static void SetBootRegs(u32 pc, u32 gp, u32 sp)
 	psxCpu->Notify(R3000ACPU_NOTIFY_AFTER_LOAD, NULL);
 }
 
-void BiosBootBypass() {
+int BiosBootBypass() {
+	struct CdrStat stat = { 0, 0, };
 	assert(psxRegs.pc == 0x80030000);
 
+	// no bypass if the lid is open
+	CDR__getStatus(&stat);
+	if (stat.Status & 0x10)
+		return 0;
+
 	// skip BIOS logos and region check
 	psxCpu->Notify(R3000ACPU_NOTIFY_BEFORE_SAVE, NULL);
 	psxRegs.pc = psxRegs.GPR.n.ra;
+	return 1;
 }
 
 static void getFromCnf(char *buf, const char *key, u32 *val)
diff --git a/libpcsxcore/misc.h b/libpcsxcore/misc.h
index a1c36bb9..539acc7b 100644
--- a/libpcsxcore/misc.h
+++ b/libpcsxcore/misc.h
@@ -57,7 +57,7 @@ extern char CdromId[10];
 extern char CdromLabel[33];
 extern int  CdromFrontendId; // for frontend use
 
-void BiosBootBypass();
+int BiosBootBypass();
 
 int LoadCdrom();
 int LoadCdromFile(const char *filename, EXE_HEADER *head);
diff --git a/libpcsxcore/plugins.h b/libpcsxcore/plugins.h
index d2086656..b106028c 100644
--- a/libpcsxcore/plugins.h
+++ b/libpcsxcore/plugins.h
@@ -161,6 +161,8 @@ extern CDRsetfilename        CDR_setfilename;
 extern CDRreadCDDA           CDR_readCDDA;
 extern CDRgetTE              CDR_getTE;
 
+long CALLBACK CDR__getStatus(struct CdrStat *stat);
+
 // SPU Functions
 typedef long (CALLBACK* SPUinit)(void);				
 typedef long (CALLBACK* SPUshutdown)(void);	
diff --git a/libpcsxcore/r3000a.c b/libpcsxcore/r3000a.c
index fb043ae0..0c29dba7 100644
--- a/libpcsxcore/r3000a.c
+++ b/libpcsxcore/r3000a.c
@@ -76,8 +76,7 @@ void psxReset() {
 	if (!Config.HLE) {
 		psxExecuteBios();
 		if (psxRegs.pc == 0x80030000 && !Config.SlowBoot) {
-			BiosBootBypass();
-			introBypassed = TRUE;
+			introBypassed = BiosBootBypass();
 		}
 	}
 	if (Config.HLE || introBypassed)
-- 
2.39.2