From 8abe081bd04639b47534922c88204cef11c4b950 Mon Sep 17 00:00:00 2001
From: Li-Ta Lo <ollie@lanl.gov>
Date: Mon, 21 May 2001 04:12:04 +0000
Subject: [PATCH] experimental stuff for delay transaction

---
 src/northsouthbridge/sis/550/550_regs.inc  |  5 ++++-
 src/northsouthbridge/sis/550/southbridge.c | 16 ++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/northsouthbridge/sis/550/550_regs.inc b/src/northsouthbridge/sis/550/550_regs.inc
index 30d1d91f85..dce41f21f7 100644
--- a/src/northsouthbridge/sis/550/550_regs.inc
+++ b/src/northsouthbridge/sis/550/550_regs.inc
@@ -65,7 +65,10 @@ northbridge_init_table:
 //	.byte	0x6A,	0xC0	#
 //	.byte	0x6B,	0x01	# 0x00 -> 66/133 MHZ, 0x01 -> 100 MHZ
 //	.byte	0x6C,	0x20	# 0x2E -> 66 MHZ, 0x20 -> 100 MHZ, 0x2C -> 133 MHZ
- 
+
+	.byte	0x7a,	0x00	# Delay transaction, experimental
+	.byte	0x7b,	0x00
+
 	/* PCI Interface */
 	.byte	0x80,	0x01	#
 	.byte	0x81,	0xd1	#
diff --git a/src/northsouthbridge/sis/550/southbridge.c b/src/northsouthbridge/sis/550/southbridge.c
index 3abbc2d7c7..6db8d95d40 100644
--- a/src/northsouthbridge/sis/550/southbridge.c
+++ b/src/northsouthbridge/sis/550/southbridge.c
@@ -95,6 +95,19 @@ serial_irq_fixedup(void)
 	}
 }
 
+static void
+south_fixup(void)
+{
+	struct pci_dev *pcidev;
+
+	pcidev = pci_find_device(PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_503, (void *)NULL);
+	if (pcidev != NULL) {
+	    u8 reg;
+	    pci_read_config_word(pcidev, 0x77, &temp);
+	    pci_write_config_byte(pci_dev, 0x77, temp & 0xEF);
+	}
+}
+
 static void
 acpi_fixup(void)
 {
@@ -158,5 +171,8 @@ final_southbridge_fixup()
 	serial_irq_fixedup();
 	acpi_fixup();
 
+	/* Delay transaction, experimental */
+	south_fixup();
+
 	DBG("Southbridge fixup done for SIS 503\n");
 }