From a3cbbf7652db37cb6b5728028bd61139d57a5cac Mon Sep 17 00:00:00 2001 From: Lijian Zhao Date: Thu, 26 Oct 2017 11:59:14 -0700 Subject: 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 Reviewed-on: https://review.coreboot.org/22189 Reviewed-by: Aaron Durbin Tested-by: build bot (Jenkins) --- .../intel/common/block/include/intelblocks/p2sb.h | 22 ++++++ src/soc/intel/common/block/p2sb/Kconfig | 5 ++ src/soc/intel/common/block/p2sb/Makefile.inc | 1 + src/soc/intel/common/block/p2sb/p2sb.c | 80 ++++++++++++++++++++++ 4 files changed, 108 insertions(+) create mode 100644 src/soc/intel/common/block/include/intelblocks/p2sb.h create mode 100644 src/soc/intel/common/block/p2sb/Kconfig create mode 100644 src/soc/intel/common/block/p2sb/Makefile.inc create mode 100644 src/soc/intel/common/block/p2sb/p2sb.c 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 +#include +#include +#include +#include +#include +#include +#include +#include + +#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, +}; -- cgit v1.2.3