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authorLijian Zhao <lijian.zhao@intel.com>2017-10-26 11:59:14 -0700
committerAaron Durbin <adurbin@chromium.org>2017-10-27 20:13:27 +0000
commita3cbbf7652db37cb6b5728028bd61139d57a5cac (patch)
tree70e7f273ed532e53232b02d1f66c679ed814678c /src
parentbb59f67ee8aa91eed6cc30daec3fa08d5b651f81 (diff)
intel/common/p2sb: Add common p2sb driver
Add common p2sb device driver that will use fixed resource instead dynamic assigned by PCI enumeration. TEST=None Change-Id: Ie3f7036a5956e3db1662678aaf43023ff79ae10e Signed-off-by: Lijian Zhao <lijian.zhao@intel.com> Reviewed-on: https://review.coreboot.org/22189 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
-rw-r--r--src/soc/intel/common/block/include/intelblocks/p2sb.h22
-rw-r--r--src/soc/intel/common/block/p2sb/Kconfig5
-rw-r--r--src/soc/intel/common/block/p2sb/Makefile.inc1
-rw-r--r--src/soc/intel/common/block/p2sb/p2sb.c80
4 files changed, 108 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/p2sb.h b/src/soc/intel/common/block/include/intelblocks/p2sb.h
new file mode 100644
index 0000000000..8139a69b62
--- /dev/null
+++ b/src/soc/intel/common/block/include/intelblocks/p2sb.h
@@ -0,0 +1,22 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017 Intel Corporation.
+ *
+ * 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.
+ */
+
+#ifndef SOC_INTEL_COMMON_BLOCK_P2SB_H
+#define SOC_INTEL_COMMON_BLOCK_P2SB_H
+
+void p2sb_unhide(void);
+void p2sb_hide(void);
+
+#endif /* SOC_INTEL_COMMON_BLOCK_P2SB_H */
diff --git a/src/soc/intel/common/block/p2sb/Kconfig b/src/soc/intel/common/block/p2sb/Kconfig
new file mode 100644
index 0000000000..7f292cde9e
--- /dev/null
+++ b/src/soc/intel/common/block/p2sb/Kconfig
@@ -0,0 +1,5 @@
+config SOC_INTEL_COMMON_BLOCK_P2SB
+ bool
+ depends on SOC_INTEL_COMMON_BLOCK_PCR
+ help
+ Intel Processor common P2SB driver
diff --git a/src/soc/intel/common/block/p2sb/Makefile.inc b/src/soc/intel/common/block/p2sb/Makefile.inc
new file mode 100644
index 0000000000..d78714b03e
--- /dev/null
+++ b/src/soc/intel/common/block/p2sb/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_P2SB) += p2sb.c
diff --git a/src/soc/intel/common/block/p2sb/p2sb.c b/src/soc/intel/common/block/p2sb/p2sb.c
new file mode 100644
index 0000000000..63b9c85613
--- /dev/null
+++ b/src/soc/intel/common/block/p2sb/p2sb.c
@@ -0,0 +1,80 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 Google 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 <arch/io.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <rules.h>
+#include <soc/iomap.h>
+#include <soc/pci_devs.h>
+#include <intelblocks/p2sb.h>
+
+#define P2SB_E0 0xe0
+#define HIDE_BIT (1 << 0)
+
+static void p2sb_set_hide_bit(int hide)
+{
+ struct device *dev;
+ const uint16_t reg = P2SB_E0 + 1;
+ const uint8_t mask = HIDE_BIT;
+ uint8_t val;
+
+ dev = PCH_DEV_P2SB;
+
+ val = pci_read_config8(dev, reg);
+ val &= ~mask;
+ if (hide)
+ val |= mask;
+ pci_write_config8(dev, reg, val);
+}
+
+void p2sb_unhide(void)
+{
+ p2sb_set_hide_bit(0);
+}
+
+void p2sb_hide(void)
+{
+ p2sb_set_hide_bit(1);
+}
+
+static void read_resources(struct device *dev)
+{
+ /*
+ * There's only one resource on the P2SB device. It's also already
+ * manually set to a fixed address in earlier boot stages.
+ */
+ mmio_resource(dev, PCI_BASE_ADDRESS_0, P2SB_BAR / KiB, P2SB_SIZE / KiB);
+}
+
+static const struct device_operations device_ops = {
+ .read_resources = read_resources,
+ .set_resources = DEVICE_NOOP,
+};
+
+static const unsigned short pci_device_ids[] = {
+ PCI_DEVICE_ID_INTEL_APL_P2SB,
+ PCI_DEVICE_ID_INTEL_GLK_P2SB,
+ PCI_DEVICE_ID_INTEL_CNL_P2SB,
+ 0,
+};
+
+static const struct pci_driver pmc __pci_driver = {
+ .ops = &device_ops,
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .devices = pci_device_ids,
+};