soc/intel/tigerlake: Generate PMC ACPI device at runtime
In an attempt to help reduce the amount of static ASL files that are littered throughout the codebase, pmc.asl was converted to runtime SSDT generation instead. If future SoCs reuse the same PMC, then this function can be moved to soc/intel/common/block/pmc for example. TEST=Verified the following was in the decompiled SSDT: Scope (\_SB.PCI0) { Device (PMC) { Name (_HID, "INTC1026") // _HID: Hardware ID Name (_DDN, "Intel(R) Tiger Lake IPC Controller") Name (_CRS, ResourceTemplate () { Memory32Fixed (ReadWrite, 0xFE000000, // Address Base 0x00010000, // Address Length ) }) } } Also the following found in linux's /var/log/messages: "acpi INTC1026:00: GPIO: looking up 0 in _CRS", indicating the PMC ACPI device was found and its _CRS was locatable. Change-Id: I665c873d8a80bd503acc4a9f0241c7a6ea425e16 Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org Reviewed-on: https://review.coreboot.org/c/coreboot/+/41408 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
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/* SPDX-License-Identifier: GPL-2.0-only */
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#include <soc/iomap.h>
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Scope (\_SB.PCI0) {
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Device (PMC)
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{
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Name (_HID, "INTC1026")
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Name (_DDN, "Intel(R) Tiger Lake IPC Controller")
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/*
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* PCH preserved 32 MB MMIO range from 0xFC800000 to 0xFE7FFFFF.
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* 64KB (0xFE000000 - 0xFE00FFFF) for PMC MBAR.
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*/
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Name (_CRS, ResourceTemplate () {
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Memory32Fixed (ReadWrite, PCH_PWRM_BASE_ADDRESS, PCH_PWRM_BASE_SIZE)
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})
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/* The OS mux driver will be bound to this device node. */
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Device (MUX)
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{
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Name (_HID, "INTC105C")
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Name (_DDN, "Intel(R) Tiger Lake North Mux-Agent")
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}
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}
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}
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@ -26,9 +26,6 @@
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/* PCIE Ports */
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#include "pcie.asl"
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/* pmc 0:1f.2 */
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#include "pmc.asl"
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/* Serial IO */
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#include "serialio.asl"
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@ -6,6 +6,7 @@
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* Chapter number: 4
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*/
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#include <acpi/acpigen.h>
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#include <bootstate.h>
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#include <console/console.h>
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#include <device/mmio.h>
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@ -17,6 +18,8 @@
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#include <soc/pm.h>
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#include <soc/soc_chip.h>
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#define PMC_HID "INTC1026"
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enum pch_pmc_xtal pmc_get_xtal_freq(void)
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{
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uint8_t *const pmcbase = pmc_mmio_regs();
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@ -96,9 +99,36 @@ static void soc_pmc_read_resources(struct device *dev)
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res->flags = IORESOURCE_IO | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
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}
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static void soc_pmc_fill_ssdt(const struct device *dev)
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{
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acpigen_write_scope(acpi_device_scope(dev));
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acpigen_write_device(acpi_device_name(dev));
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acpigen_write_name_string("_HID", PMC_HID);
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acpigen_write_name_string("_DDN", "Intel(R) Tiger Lake IPC Controller");
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/*
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* Part of the PCH's reserved 32 MB MMIO range (0xFC800000 - 0xFE7FFFFF).
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* The PMC gets 0xFE000000 - 0xFE00FFFF.
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*/
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acpigen_write_name("_CRS");
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acpigen_write_resourcetemplate_header();
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acpigen_write_mem32fixed(1, PCH_PWRM_BASE_ADDRESS, PCH_PWRM_BASE_SIZE);
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acpigen_write_resourcetemplate_footer();
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acpigen_pop_len(); /* PMC Device */
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acpigen_pop_len(); /* Scope */
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printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev), dev->chip_ops->name,
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dev_path(dev));
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}
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struct device_operations pmc_ops = {
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.read_resources = soc_pmc_read_resources,
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.set_resources = noop_set_resources,
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.enable = pmc_init,
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#if CONFIG(HAVE_ACPI_TABLES)
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.acpi_fill_ssdt = soc_pmc_fill_ssdt,
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#endif
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.scan_bus = scan_static_bus,
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};
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