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From fbb842e25841100adff123f3154c3149d241fd30 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <tpearson@raptorengineeringinc.com>
Date: Fri, 12 Jun 2015 20:08:29 -0500
Subject: [PATCH 058/139] southbridge/amd/sr5650: Add optional delay after link
training
Certain devices (such as the LSI SAS 2008 controller) do not
respond to PCI probes immediately after link training. If it
is known that such a device is likely to be installed allow the
mainboard to insert an appropriate delay.
Change-Id: Ibcd9426628cacd6f88e6e3fcbc2b3eb7e3a92081
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
---
src/southbridge/amd/sr5650/chip.h | 4 ++++
src/southbridge/amd/sr5650/sr5650.c | 3 +++
2 files changed, 7 insertions(+)
diff --git a/src/southbridge/amd/sr5650/chip.h b/src/southbridge/amd/sr5650/chip.h
index 8a68998..d23c614 100644
--- a/src/southbridge/amd/sr5650/chip.h
+++ b/src/southbridge/amd/sr5650/chip.h
@@ -2,6 +2,7 @@
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, Inc.
+ * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -27,6 +28,9 @@ struct southbridge_amd_sr5650_config
u8 gpp2_configuration; /* The configuration of General Purpose Port. */
u8 gpp3a_configuration; /* The configuration of General Purpose Port. */
u16 port_enable; /* Which port is enabled? GPP(2,3,4,5,6,7,9,10,11,12,13) */
+ uint32_t pcie_settling_time; /* How long to wait after link training for PCI-e devices to
+ * initialize before probing PCI-e busses (in microseconds).
+ */
};
#endif /* SR5650_CHIP_H */
diff --git a/src/southbridge/amd/sr5650/sr5650.c b/src/southbridge/amd/sr5650/sr5650.c
index 75383de..6db1eb1 100644
--- a/src/southbridge/amd/sr5650/sr5650.c
+++ b/src/southbridge/amd/sr5650/sr5650.c
@@ -345,6 +345,7 @@ void sr5650_enable(device_t dev)
{
device_t nb_dev = 0, sb_dev = 0;
int dev_ind;
+ struct southbridge_amd_sr5650_config *cfg;
printk(BIOS_INFO, "sr5650_enable: dev=%p, VID_DID=0x%x\n", dev, get_vid_did(dev));
nb_dev = dev_find_slot(0, PCI_DEVFN(0, 0));
@@ -352,6 +353,7 @@ void sr5650_enable(device_t dev)
die("sr5650_enable: CAN NOT FIND SR5650 DEVICE, HALT!\n");
/* NOT REACHED */
}
+ cfg = (struct southbridge_amd_sr5650_config *)nb_dev->chip_info;
/* sb_dev (dev 8) is a bridge that links to southbridge. */
sb_dev = dev_find_slot(0, PCI_DEVFN(8, 0));
@@ -432,6 +434,7 @@ void sr5650_enable(device_t dev)
/* Lock HWInit Register after the last device was done */
if (dev_ind == 13) {
sr56x0_lock_hwinitreg();
+ udelay(cfg->pcie_settling_time);
}
}
--
1.9.1
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