soc/amd{common,cezanne}: Move pcie_gpp.c to common

Cezanne and Picasso can now use the same driver.

BUG=b:184766519
TEST=Boot guybrush and dump ASL. Verified it didn't change.

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: Ie4ede82935d6c69b323c1fdceaa61e306aa2820a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54026
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Jason Glenesk <jason.glenesk@gmail.com>

3 files changed, 95 insertions, 0 deletions

diff --git a/src/soc/amd/common/block/pci/Kconfig b/src/soc/amd/common/block/pci/Kconfig
index 4af0aa0d64..302a6b8497 100644
--- a/src/soc/amd/common/block/pci/Kconfig
+++ b/src/soc/amd/common/block/pci/Kconfig
@@ -10,3 +10,9 @@ config SOC_AMD_COMMON_BLOCK_PCI_MMCONF
 	help
 	  Selecting this option adds the AMD-common enable_pci_mmconf function
 	  to the build.
+
+config SOC_AMD_COMMON_BLOCK_PCIE_GPP_DRIVER
+	bool
+	depends on SOC_AMD_COMMON_BLOCK_PCI
+	help
+	  Select this option to use AMD common PCIe GPP driver.
diff --git a/src/soc/amd/common/block/pci/Makefile.inc b/src/soc/amd/common/block/pci/Makefile.inc
index 8c7a9899ae..e013777acc 100644
--- a/src/soc/amd/common/block/pci/Makefile.inc
+++ b/src/soc/amd/common/block/pci/Makefile.inc
@@ -3,6 +3,7 @@ ifeq ($(CONFIG_SOC_AMD_COMMON_BLOCK_PCI),y)
 ramstage-y += amd_pci_util.c
 ramstage-y += pci_routing_info.c
 ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi_prt.c
+ramstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_PCIE_GPP_DRIVER) += pcie_gpp.c
 
 endif # CONFIG_SOC_AMD_COMMON_BLOCK_PCI
 
diff --git a/src/soc/amd/common/block/pci/pcie_gpp.c b/src/soc/amd/common/block/pci/pcie_gpp.c
new file mode 100644
index 0000000000..58c776146f
--- /dev/null
+++ b/src/soc/amd/common/block/pci/pcie_gpp.c
@@ -0,0 +1,88 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <acpi/acpi_device.h>
+#include <acpi/acpigen.h>
+#include <acpi/acpigen_pci.h>
+#include <amdblocks/amd_pci_util.h>
+#include <assert.h>
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pciexp.h>
+#include <soc/pci_devs.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static const char *pcie_gpp_acpi_name(const struct device *dev)
+{
+	char *name;
+
+	if (dev->path.type != DEVICE_PATH_PCI)
+		return NULL;
+
+	name = malloc(ACPI_NAME_BUFFER_SIZE);
+	snprintf(name, ACPI_NAME_BUFFER_SIZE, "GP%02x", dev->path.pci.devfn);
+	name[4] = '\0';
+
+	return name;
+}
+
+static void acpi_device_write_gpp_pci_dev(const struct device *dev)
+{
+	const char *scope = acpi_device_scope(dev);
+	const char *name = acpi_device_name(dev);
+
+	assert(dev->path.type == DEVICE_PATH_PCI);
+	assert(name);
+	assert(scope);
+
+	acpigen_write_scope(scope);
+	acpigen_write_device(name);
+
+	acpigen_write_ADR_pci_device(dev);
+	acpigen_write_STA(acpi_device_status(dev));
+
+	acpigen_write_pci_GNB_PRT(dev);
+
+	acpigen_pop_len(); /* Device */
+	acpigen_pop_len(); /* Scope */
+}
+
+static struct device_operations internal_pcie_gpp_ops = {
+	.read_resources		= pci_bus_read_resources,
+	.set_resources		= pci_dev_set_resources,
+	.enable_resources	= pci_bus_enable_resources,
+	.scan_bus		= pci_scan_bridge,
+	.reset_bus		= pci_bus_reset,
+	.acpi_name		= pcie_gpp_acpi_name,
+	.acpi_fill_ssdt		= acpi_device_write_gpp_pci_dev,
+};
+
+static const struct pci_driver internal_pcie_gpp_driver __pci_driver = {
+	.ops			= &internal_pcie_gpp_ops,
+	.vendor			= PCI_VENDOR_ID_AMD,
+	.device			= PCI_DEVICE_ID_AMD_FAM17H_MODEL60H_PCIE_GPP_BUSABC,
+};
+
+static struct device_operations external_pcie_gpp_ops = {
+	.read_resources		= pci_bus_read_resources,
+	.set_resources		= pci_dev_set_resources,
+	.enable_resources	= pci_bus_enable_resources,
+	.scan_bus		= pciexp_scan_bridge,
+	.reset_bus		= pci_bus_reset,
+	.acpi_name		= pcie_gpp_acpi_name,
+	.acpi_fill_ssdt		= acpi_device_write_gpp_pci_dev,
+};
+
+static const unsigned short external_pci_gpp_ids[] = {
+	PCI_DEVICE_ID_AMD_FAM17H_MODEL60H_PCIE_GPP_D1,
+	PCI_DEVICE_ID_AMD_FAM17H_MODEL60H_PCIE_GPP_D2,
+	0
+};
+
+static const struct pci_driver external_pcie_gpp_driver __pci_driver = {
+	.ops			= &external_pcie_gpp_ops,
+	.vendor			= PCI_VENDOR_ID_AMD,
+	.devices		= external_pci_gpp_ids,
+};