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/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpi.h>
#include <device/pci_ops.h>
#include <console/console.h>
#include <device/device.h>
#include <device/mmio.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <soc/iomap.h>
#include <soc/pmc.h>
#include <soc/pci_devs.h>
#include <soc/ramstage.h>
#include <cpu/x86/smm.h>
/* While we read BAR dynamically in case it changed, let's
* initialize it with a same value
*/
static u16 acpi_base = ACPI_BASE_ADDRESS;
static u32 pwrm_base = DEFAULT_PWRM_BASE;
static void pch_power_options(struct device *dev) { /* TODO */ }
static void pch_set_acpi_mode(void)
{
if (!acpi_is_wakeup_s3()) {
apm_control(APM_CNT_ACPI_DISABLE);
}
}
static void pmc_init(struct device *dev)
{
printk(BIOS_DEBUG, "pch: %s\n", __func__);
/* 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();
/*
* Disable ACPI PM timer based on Kconfig
*
* Disabling ACPI PM timer is necessary for XTAL OSC shutdown.
* Disabling ACPI PM timer also switches off TCO.
*/
if (!CONFIG(USE_PM_ACPI_TIMER))
setbits8((volatile void *)(uintptr_t)(pwrm_base + PCH_PWRM_ACPI_TMR_CTL),
ACPI_TIM_DIS);
}
static void pci_pmc_read_resources(struct device *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,
.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 = PCI_DEVICE_ID_INTEL_DENVERTON_PMC,
};
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