skylake: Add ACPI device name handler

Add a global ACPI device name handler for the Skylake SOC that will
translate skylake device paths into an ACPI path that matches the
device objects delcared in the DSDT at soc/intel/skylake/acpi/*.

The skylake implementation uses a global acpi_name handler for the
SOC and it is not necessary to add a function to every device.

This function is used by device drivers calling acpi_device_name()
and acpi_device_path() to generate ACPI AML in the SSDT.

Change-Id: I31cecf7905a51224e7bfc40c6c4ad2487f039097
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/14841
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)

2 files changed, 70 insertions, 0 deletions

diff --git a/src/soc/intel/skylake/chip.c b/src/soc/intel/skylake/chip.c
index dbf7785888..f990d2b4a6 100644
--- a/src/soc/intel/skylake/chip.c
+++ b/src/soc/intel/skylake/chip.c
@@ -20,6 +20,7 @@
 #include <device/device.h>
 #include <device/pci.h>
 #include <fsp/util.h>
+#include <soc/acpi.h>
 #include <soc/interrupt.h>
 #include <soc/irq.h>
 #include <soc/pci_devs.h>
@@ -221,6 +222,69 @@ static const SI_PCH_DEVICE_INTERRUPT_CONFIG devintconfig[] = {
 			PCI_FUNC(PCH_DEVFN_ISH), int_A, ISH_IRQ)
 };
 
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+const char *soc_acpi_name(struct device *dev)
+{
+	if (dev->path.type == DEVICE_PATH_DOMAIN)
+		return "PCI0";
+
+	if (dev->path.type != DEVICE_PATH_PCI)
+		return NULL;
+
+	switch (dev->path.pci.devfn) {
+	case SA_DEVFN_ROOT:	return "MCHC";
+	case SA_DEVFN_IGD:	return "GFX0";
+	case PCH_DEVFN_ISH:	return "ISHB";
+	case PCH_DEVFN_XHCI:	return "XHCI";
+	case PCH_DEVFN_USBOTG:	return "XDCI";
+	case PCH_DEVFN_THERMAL:	return "THRM";
+	case PCH_DEVFN_CIO:	return "ICIO";
+	case PCH_DEVFN_I2C0:	return "I2C0";
+	case PCH_DEVFN_I2C1:	return "I2C1";
+	case PCH_DEVFN_I2C2:	return "I2C2";
+	case PCH_DEVFN_I2C3:	return "I2C3";
+	case PCH_DEVFN_ME:	return "MEI1";
+	case PCH_DEVFN_ME_2:	return "MEI2";
+	case PCH_DEVFN_ME_IDER:	return "MEID";
+	case PCH_DEVFN_ME_KT:	return "MEKT";
+	case PCH_DEVFN_ME_3:	return "MEI3";
+	case PCH_DEVFN_SATA:	return "SATA";
+	case PCH_DEVFN_UART2:	return "UAR2";
+	case PCH_DEVFN_I2C4:	return "I2C4";
+	case PCH_DEVFN_I2C5:	return "I2C5";
+	case PCH_DEVFN_PCIE1:	return "RP01";
+	case PCH_DEVFN_PCIE2:	return "RP02";
+	case PCH_DEVFN_PCIE3:	return "RP03";
+	case PCH_DEVFN_PCIE4:	return "RP04";
+	case PCH_DEVFN_PCIE5:	return "RP05";
+	case PCH_DEVFN_PCIE6:	return "RP06";
+	case PCH_DEVFN_PCIE7:	return "RP07";
+	case PCH_DEVFN_PCIE8:	return "RP08";
+	case PCH_DEVFN_PCIE9:	return "RP09";
+	case PCH_DEVFN_PCIE10:	return "RP10";
+	case PCH_DEVFN_PCIE11:	return "RP11";
+	case PCH_DEVFN_PCIE12:	return "RP12";
+	case PCH_DEVFN_UART0:	return "UAR0";
+	case PCH_DEVFN_UART1:	return "UAR1";
+	case PCH_DEVFN_GSPI0:	return "SPI0";
+	case PCH_DEVFN_GSPI1:	return "SPI1";
+	case PCH_DEVFN_EMMC:	return "EMMC";
+	case PCH_DEVFN_SDIO:	return "SDIO";
+	case PCH_DEVFN_SDCARD:	return "SDXC";
+	case PCH_DEVFN_LPC:	return "LPCB";
+	case PCH_DEVFN_P2SB:	return "P2SB";
+	case PCH_DEVFN_PMC:	return "PMC_";
+	case PCH_DEVFN_HDA:	return "HDAS";
+	case PCH_DEVFN_SMBUS:	return "SBUS";
+	case PCH_DEVFN_SPI:	return "FSPI";
+	case PCH_DEVFN_GBE:	return "IGBE";
+	case PCH_DEVFN_TRACEHUB:return "THUB";
+	}
+
+	return NULL;
+}
+#endif
+
 static void pci_domain_set_resources(device_t dev)
 {
 	assign_resources(dev->link_list);
@@ -231,11 +295,16 @@ static struct device_operations pci_domain_ops = {
 	.set_resources    = &pci_domain_set_resources,
 	.scan_bus         = &pci_domain_scan_bus,
 	.ops_pci_bus      = &pci_bus_default_ops,
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+	.acpi_name        = &soc_acpi_name,
+#endif
 };
 
 static struct device_operations cpu_bus_ops = {
 	.init             = &soc_init_cpus,
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
 	.acpi_fill_ssdt_generator = generate_cpu_entries,
+#endif
 };
 
 static void soc_enable(device_t dev)
diff --git a/src/soc/intel/skylake/include/soc/ramstage.h b/src/soc/intel/skylake/include/soc/ramstage.h
index 2cd2d16050..55f9972e4a 100644
--- a/src/soc/intel/skylake/include/soc/ramstage.h
+++ b/src/soc/intel/skylake/include/soc/ramstage.h
@@ -24,6 +24,7 @@
 void pch_enable_dev(device_t dev);
 void soc_init_pre_device(void *chip_info);
 void soc_init_cpus(device_t dev);
+const char *soc_acpi_name(struct device *dev);
 
 extern struct pci_operations soc_pci_ops;