From a404133547c98094a326f60b83e1576ba94b8c06 Mon Sep 17 00:00:00 2001 From: Mariusz Szafranski Date: Wed, 2 Aug 2017 17:28:17 +0200 Subject: soc/intel/denverton_ns: Add support for Intel Atom C3000 SoC This change adds support for Intel Atom C3000 SoC ("Denverton" and "Denverton-NS"). Code is partially based on Apollo Lake/Skylake code. Change-Id: I53d69aede3b92f1fe06b74a96cc40187fb9825f1 Signed-off-by: Mariusz Szafranski Reviewed-on: https://review.coreboot.org/20861 Tested-by: build bot (Jenkins) Reviewed-by: FEI WANG --- src/soc/intel/denverton_ns/pmc.c | 116 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 116 insertions(+) create mode 100644 src/soc/intel/denverton_ns/pmc.c (limited to 'src/soc/intel/denverton_ns/pmc.c') diff --git a/src/soc/intel/denverton_ns/pmc.c b/src/soc/intel/denverton_ns/pmc.c new file mode 100644 index 0000000000..90237a0de3 --- /dev/null +++ b/src/soc/intel/denverton_ns/pmc.c @@ -0,0 +1,116 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 - 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 +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +/* While we read BAR dynamically in case it changed, let's + * initialize it with a same value + */ +static u16 acpi_base = DEFAULT_ACPI_BASE; +static u32 pwrm_base = DEFAULT_PWRM_BASE; + +static void pch_power_options(device_t dev) { /* TODO */ } + +static void pch_set_acpi_mode(void) +{ + if (IS_ENABLED(CONFIG_HAVE_SMI_HANDLER) && !acpi_is_wakeup_s3()) { + printk(BIOS_DEBUG, "Disabling ACPI via APMC:\n"); + outb(APM_CNT_ACPI_DISABLE, APM_CNT); + printk(BIOS_DEBUG, "done.\n"); + } +} + +static void pmc_init(device_t dev) +{ + printk(BIOS_DEBUG, "pch: pmc_init\n"); + + /* Get the base address */ + acpi_base = pci_read_config16(dev, PMC_ACPI_BASE) & MASK_PMC_ACPI_BASE; + pwrm_base = pci_read_config32(dev, PMC_PWRM_BASE) & MASK_PMC_PWRM_BASE; + + /* Set the value for PCI command register. */ + pci_write_config16(dev, PCI_COMMAND, PCI_COMMAND_MASTER | + PCI_COMMAND_MEMORY | + PCI_COMMAND_IO); + + /* Setup power options. */ + pch_power_options(dev); + + /* Configure ACPI mode. */ + pch_set_acpi_mode(); +} + +static void pci_pmc_read_resources(device_t dev) +{ + struct resource *res; + + /* Get the normal PCI resources of this device. */ + pci_dev_read_resources(dev); + + /* Add MMIO resource + * Use 0xaa as an unused index for PWRM BAR. + */ + u32 reg32 = pci_read_config32(dev, PMC_PWRM_BASE) & MASK_PMC_PWRM_BASE; + if ((reg32 != 0x0) && (reg32 != 0xffffffff)) { + res = new_resource(dev, 0xaa); + res->base = reg32; + res->size = 64 * 1024; /* 64K bytes memory config space */ + res->flags = + IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED; + printk(BIOS_DEBUG, + "Adding PMC PWRM config space BAR 0x%08lx-0x%08lx.\n", + (unsigned long)(res->base), + (unsigned long)(res->base + res->size)); + } + + /* Add MMIO resource + * Use 0xab as an unused index for ACPI BAR. + */ + u16 reg16 = pci_read_config16(dev, PMC_ACPI_BASE) & MASK_PMC_ACPI_BASE; + if ((reg16 != 0x0) && (reg16 != 0xffff)) { + res = new_resource(dev, 0xab); + res->base = reg16; + res->size = 0x100; /* 256 bytes I/O config space */ + res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | + IORESOURCE_ASSIGNED | IORESOURCE_FIXED; + } +} + +static struct device_operations pmc_ops = { + .read_resources = pci_pmc_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .scan_bus = 0, + .init = pmc_init, + .ops_pci = &soc_pci_ops, +}; + +static const struct pci_driver pch_pmc __pci_driver = { + .ops = &pmc_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = PMC_DEVID, +}; -- cgit v1.2.3