diff options
| -rw-r--r-- | src/soc/intel/common/block/pcie/Kconfig | 11 | ||||
| -rw-r--r-- | src/soc/intel/common/block/pcie/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/intel/common/block/pcie/pcie.c | 149 |
3 files changed, 161 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/pcie/Kconfig b/src/soc/intel/common/block/pcie/Kconfig new file mode 100644 index 0000000000..c30d07e51e --- /dev/null +++ b/src/soc/intel/common/block/pcie/Kconfig @@ -0,0 +1,11 @@ +config SOC_INTEL_COMMON_BLOCK_PCIE + bool + help + Intel Processor common PCIE support + +config PCIE_DEBUG_INFO + bool + help + Enable debug logs in PCIe module. Allows debug information on memory + base and limit, prefetchable memory base and limit, prefetchable memory + base upper 32 bits and prefetchable memory limit upper 32 bits. diff --git a/src/soc/intel/common/block/pcie/Makefile.inc b/src/soc/intel/common/block/pcie/Makefile.inc new file mode 100644 index 0000000000..ac311a7abd --- /dev/null +++ b/src/soc/intel/common/block/pcie/Makefile.inc @@ -0,0 +1 @@ +ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_PCIE) += pcie.c diff --git a/src/soc/intel/common/block/pcie/pcie.c b/src/soc/intel/common/block/pcie/pcie.c new file mode 100644 index 0000000000..dfc92fed27 --- /dev/null +++ b/src/soc/intel/common/block/pcie/pcie.c @@ -0,0 +1,149 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 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. + */ + +#include <console/console.h> +#include <device/pci.h> +#include <device/pciexp.h> +#include <device/pci_def.h> +#include <device/pci_ids.h> + +#define CACHE_LINE_SIZE 0x10 +/* Latency tolerance reporting, max non-snoop latency value 3.14ms */ +#define PCIE_LTR_MAX_NO_SNOOP_LATENCY_VALUE 0x1003 +/* Latency tolerance reporting, max snoop latency value 3.14ms */ +#define PCIE_LTR_MAX_SNOOP_LATENCY_VALUE 0x1003 + +static void pch_pcie_init(struct device *dev) +{ + u16 reg16; + + printk(BIOS_DEBUG, "Initializing PCH PCIe bridge.\n"); + + /* Enable SERR */ + pci_or_config32(dev, PCI_COMMAND, PCI_COMMAND_SERR); + + /* Enable Bus Master */ + pci_or_config32(dev, PCI_COMMAND, PCI_COMMAND_MASTER); + + /* Set Cache Line Size to 0x10 */ + pci_write_config8(dev, PCI_CACHE_LINE_SIZE, CACHE_LINE_SIZE); + + /* disable parity error response, enable ISA */ + pci_update_config16(dev, PCI_BRIDGE_CONTROL, ~1, 1<<2); + + if (IS_ENABLED(CONFIG_PCIE_DEBUG_INFO)) { + printk(BIOS_SPEW, " MBL = 0x%08x\n", + pci_read_config32(dev, PCI_MEMORY_BASE)); + printk(BIOS_SPEW, " PMBL = 0x%08x\n", + pci_read_config32(dev, PCI_PREF_MEMORY_BASE)); + printk(BIOS_SPEW, " PMBU32 = 0x%08x\n", + pci_read_config32(dev, PCI_PREF_BASE_UPPER32)); + printk(BIOS_SPEW, " PMLU32 = 0x%08x\n", + pci_read_config32(dev, PCI_PREF_LIMIT_UPPER32)); + } + + /* Clear errors in status registers */ + reg16 = pci_read_config16(dev, PCI_STATUS); + pci_write_config16(dev, PCI_STATUS, reg16); + reg16 = pci_read_config16(dev, PCI_SEC_STATUS); + pci_write_config16(dev, PCI_SEC_STATUS, reg16); +} + +static void pcie_set_L1_ss_max_latency(device_t dev, unsigned int offset) +{ + /* Set max snoop and non-snoop latency for the SOC */ + pci_write_config32(dev, offset, + PCIE_LTR_MAX_NO_SNOOP_LATENCY_VALUE << 16 | + PCIE_LTR_MAX_SNOOP_LATENCY_VALUE); +} + +static struct pci_operations pcie_ops = { + .set_L1_ss_latency = pcie_set_L1_ss_max_latency, +}; + +static struct device_operations device_ops = { + .read_resources = pci_bus_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_bus_enable_resources, + .init = pch_pcie_init, + .scan_bus = pciexp_scan_bridge, + .ops_pci = &pcie_ops, +}; + +static const unsigned short pcie_device_ids[] = { + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP1, + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP2, + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP3, + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP4, + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP5, + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP6, + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP7, + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP8, + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP9, + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP10, + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP11, + PCI_DEVICE_ID_INTEL_SPT_LP_PCIE_RP12, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP1, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP2, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP3, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP4, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP5, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP6, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP7, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP8, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP9, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP10, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP11, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP12, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP13, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP14, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP15, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP16, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP17, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP18, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP19, + PCI_DEVICE_ID_INTEL_SPT_H_PCIE_RP20, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP1, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP2, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP3, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP4, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP5, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP6, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP7, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP8, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP9, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP10, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP11, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP12, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP13, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP14, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP15, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP16, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP17, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP18, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP19, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP20, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP21, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP22, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP23, + PCI_DEVICE_ID_INTEL_KBP_H_PCIE_RP24, + 0 +}; + +static const struct pci_driver pch_pcie __pci_driver = { + .ops = &device_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .devices = pcie_device_ids, +}; |