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authorLance Zhao <lijian.zhao@intel.com>2015-11-12 18:19:41 -0800
committerMartin Roth <martinroth@google.com>2016-04-11 18:21:06 +0200
commita7ff9c59a1e71da0ab956395dfa92287a81d7ac3 (patch)
tree0834ce270272db9320784d79321f8724d05ca54a /src/soc/intel/apollolake/lpc.c
parent2fc82d699d23cf3136a25e06972f90a9fc4909ab (diff)
downloadcoreboot-a7ff9c59a1e71da0ab956395dfa92287a81d7ac3.tar.xz
soc/apollolake: Add lpc device driver
A dedicated pci device driver required for LPC devices as the legacy IO range need to be included to avoid IO resource confilict. Blindly set to 0~0x1000 to also avoid the IO resource of COMA/COMB/LPT/FDD and LPC.Without this driver system will have assertion on load RTC DXE driver in UEFI payloads. Change-Id: Icc462c159c2cf39cc1030d55acee79e73a6bfb35 Signed-off-by: Lance Zhao <lijian.zhao@intel.com> Reviewed-on: https://review.coreboot.org/13356 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/soc/intel/apollolake/lpc.c')
-rw-r--r--src/soc/intel/apollolake/lpc.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/lpc.c b/src/soc/intel/apollolake/lpc.c
new file mode 100644
index 0000000000..abc5245376
--- /dev/null
+++ b/src/soc/intel/apollolake/lpc.c
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corp.
+ * (Written by Lance Zhao <lijian.zhao@intel.com> for Intel Corp.)
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <soc/pci_ids.h>
+
+static void soc_lpc_add_io_resources(device_t dev)
+{
+ struct resource *res;
+
+ /* Add the default claimed legacy IO range for the LPC device. */
+ res = new_resource(dev, 0);
+ res->base = 0;
+ res->size = 0x1000;
+ res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
+}
+
+static void soc_lpc_read_resources(device_t dev)
+{
+ /* Get the PCI resources of this device. */
+ pci_dev_read_resources(dev);
+
+ /* Add IO resources to LPC. */
+ soc_lpc_add_io_resources(dev);
+}
+
+static struct device_operations device_ops = {
+ .read_resources = &soc_lpc_read_resources,
+ .set_resources = &pci_dev_set_resources,
+ .enable_resources = &pci_dev_enable_resources,
+};
+
+static const struct pci_driver soc_lpc __pci_driver = {
+ .ops = &device_ops,
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .device = PCI_DEVICE_ID_APOLLOLAKE_LPC,
+};