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authorDavid Hendricks <dhendricks@fb.com>2018-03-06 18:48:44 -0800
committerPatrick Georgi <pgeorgi@google.com>2018-06-28 09:05:19 +0000
commit0ea93cdc35d4e49b416c9c73093d722c0a7bd860 (patch)
tree64400f5cbb72eb10c40b7983dcea1b018b58b91f /src
parent7bea0846db3ba262512a36170e8ea38135522001 (diff)
downloadcoreboot-0ea93cdc35d4e49b416c9c73093d722c0a7bd860.tar.xz
fsp_broadwell_de: Add ability to set PCIe completion timeout
This enables the user to set the completion timeout value in PCI Express Device Control 2 register via devicetree.cb. Based on corebootBDE-270-iou-complto.patch in Arista EOS 4.20 release. Change-Id: If0527899bc2047d0e57c11f7801768d07f9a5179 Signed-off-by: David Hendricks <dhendricks@fb.com> Reviewed-on: https://review.coreboot.org/26225 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Diffstat (limited to 'src')
-rw-r--r--src/soc/intel/fsp_broadwell_de/Makefile.inc1
-rw-r--r--src/soc/intel/fsp_broadwell_de/chip.h4
-rw-r--r--src/soc/intel/fsp_broadwell_de/iou_complto.c51
3 files changed, 56 insertions, 0 deletions
diff --git a/src/soc/intel/fsp_broadwell_de/Makefile.inc b/src/soc/intel/fsp_broadwell_de/Makefile.inc
index fc6cdd3d42..024035cef9 100644
--- a/src/soc/intel/fsp_broadwell_de/Makefile.inc
+++ b/src/soc/intel/fsp_broadwell_de/Makefile.inc
@@ -30,6 +30,7 @@ ramstage-y += smbus.c
romstage-y += tsc_freq.c
ramstage-y += smi.c
ramstage-y += gpio.c
+ramstage-y += iou_complto.c
ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smmrelocate.c
ramstage-$(CONFIG_HAVE_SMI_HANDLER) += pmutil.c
smm-$(CONFIG_HAVE_SMI_HANDLER) += pmutil.c
diff --git a/src/soc/intel/fsp_broadwell_de/chip.h b/src/soc/intel/fsp_broadwell_de/chip.h
index ed01c89de1..b7f59f7f12 100644
--- a/src/soc/intel/fsp_broadwell_de/chip.h
+++ b/src/soc/intel/fsp_broadwell_de/chip.h
@@ -23,7 +23,11 @@
* specified by the devicetree. */
struct soc_intel_fsp_broadwell_de_config {
+ /* PCIe completion timeout value */
+ int pcie_compltoval;
};
+typedef struct soc_intel_fsp_broadwell_de_config config_t;
+
extern struct chip_operations soc_intel_fsp_broadwell_de_ops;
#endif /* _SOC_CHIP_H_ */
diff --git a/src/soc/intel/fsp_broadwell_de/iou_complto.c b/src/soc/intel/fsp_broadwell_de/iou_complto.c
new file mode 100644
index 0000000000..dcc307174f
--- /dev/null
+++ b/src/soc/intel/fsp_broadwell_de/iou_complto.c
@@ -0,0 +1,51 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 Arista Networks, Inc.
+ *
+ * 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
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <soc/intel/fsp_broadwell_de/chip.h>
+
+#define DEVCTL2 0xb8
+
+static void iou_init(struct device *dev)
+{
+ const config_t *config = dev->chip_info;
+ u16 devctl2;
+
+ /* pcie completion timeout
+ EDS Vol 2, Section 7.2.54 */
+ devctl2 = pci_read_config16(dev, DEVCTL2);
+ devctl2 = (devctl2 & ~0xf) | (config->pcie_compltoval & 0xf);
+ pci_write_config16(dev, DEVCTL2, devctl2);
+}
+
+static struct device_operations iou_ops = {
+ .read_resources = pci_bus_read_resources,
+ .set_resources = pci_dev_set_resources,
+ .enable_resources = pci_bus_enable_resources,
+ .scan_bus = pci_scan_bridge,
+ .reset_bus = pci_bus_reset,
+ .init = iou_init,
+};
+
+static const unsigned short iou_device_ids[] = {
+ 0x6f02, 0x6f08, 0 };
+
+static const struct pci_driver iou_driver __pci_driver = {
+ .ops = &iou_ops,
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .devices = iou_device_ids,
+};