mb/google/skyrim: Update DXIO descriptor definition

Update definition to be more intuitive and extensible.
Port descriptors will be defined as individual entities and added
to the descriptor list as such.

BUG=b:281059446
TEST=builds

Change-Id: Ic5a06a7d1bdb9123a0a242a571f094ac3233d7b2
Signed-off-by: Jon Murphy <jpmurphy@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79627
Reviewed-by: Tim Van Patten <timvp@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Eric Lai <ericllai@google.com>

4 files changed, 85 insertions, 6 deletions

diff --git a/src/mainboard/google/skyrim/variants/baseboard/Makefile.inc b/src/mainboard/google/skyrim/variants/baseboard/Makefile.inc
index 0f7cc89975d4..e76a9df873e0 100644
--- a/src/mainboard/google/skyrim/variants/baseboard/Makefile.inc
+++ b/src/mainboard/google/skyrim/variants/baseboard/Makefile.inc
@@ -3,8 +3,10 @@
 bootblock-y += gpio.c
 
 romstage-y += gpio.c
+romstage-y += port_descriptors.c
 
 ramstage-y += gpio.c
+ramstage-y += port_descriptors.c
 
 verstage-$(CONFIG_VBOOT_STARTS_BEFORE_BOOTBLOCK) += gpio.c
 
diff --git a/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/port_descriptors.h b/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/port_descriptors.h
new file mode 100644
index 000000000000..40da0b416c96
--- /dev/null
+++ b/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/port_descriptors.h
@@ -0,0 +1,55 @@
+#ifndef __BASEBOARD_PORT_DESCRIPTORS_H__
+#define __BASEBOARD_PORT_DESCRIPTORS_H__
+
+#define WLAN_DEVFN PCIE_GPP_2_0_DEVFN
+#define SD_DEVFN PCIE_GPP_2_1_DEVFN
+#define NVME_DEVFN PCIE_GPP_2_2_DEVFN
+
+#define WLAN_DXIO_DESCRIPTOR {                   \
+	.engine_type = PCIE_ENGINE,              \
+	.port_present = true,                    \
+	.start_logical_lane = 0,                 \
+	.end_logical_lane = 0,                   \
+	.device_number = PCI_SLOT(WLAN_DEVFN),   \
+	.function_number = PCI_FUNC(WLAN_DEVFN), \
+	.link_speed_capability = GEN3,           \
+	.turn_off_unused_lanes = true,           \
+	.link_aspm = ASPM_L1,                    \
+	.link_aspm_L1_1 = true,                  \
+	.link_aspm_L1_2 = true,                  \
+	.clk_req = CLK_REQ2,                     \
+}
+
+#define SD_DXIO_DESCRIPTOR {                     \
+	.engine_type = PCIE_ENGINE,              \
+	.port_present = true,                    \
+	.start_logical_lane = 1,                 \
+	.end_logical_lane = 1,                   \
+	.device_number = PCI_SLOT(SD_DEVFN),     \
+	.function_number = PCI_FUNC(SD_DEVFN),   \
+	.link_speed_capability = GEN3,           \
+	.turn_off_unused_lanes = true,           \
+	.link_hotplug = HOTPLUG_ENHANCED,        \
+	.link_aspm = ASPM_L1,                    \
+	.link_aspm_L1_1 = true,                  \
+	.gpio_group_id = GPIO_27,                \
+	.clk_req = CLK_REQ1,                     \
+}
+
+#define NVME_DXIO_DESCRIPTOR {                   \
+	.engine_type = PCIE_ENGINE,              \
+	.port_present = true,                    \
+	.start_logical_lane = 2,                 \
+	.end_logical_lane = 3,                   \
+	.device_number = PCI_SLOT(NVME_DEVFN),   \
+	.function_number = PCI_FUNC(NVME_DEVFN), \
+	.link_speed_capability = GEN3,           \
+	.turn_off_unused_lanes = true,           \
+	.link_aspm = ASPM_L1,                    \
+	.link_aspm_L1_1 = true,                  \
+	.link_aspm_L1_2 = true,                  \
+	.gpio_group_id = GPIO_6,                 \
+	.clk_req = CLK_REQ0,                     \
+}
+
+#endif //__BASEBOARD_PORT_DESCRIPTORS_H__
diff --git a/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h
index e49b7c4e805c..f3bdf4c4fb44 100644
--- a/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h
+++ b/src/mainboard/google/skyrim/variants/baseboard/include/baseboard/variants.h
@@ -7,10 +7,6 @@
 #include <soc/pci_devs.h>
 #include <platform_descriptors.h>
 
-#define WLAN_DEVFN	PCIE_GPP_2_0_DEVFN
-#define SD_DEVFN	PCIE_GPP_2_1_DEVFN
-#define NVME_DEVFN	PCIE_GPP_2_2_DEVFN
-
 /* This function provides base GPIO configuration table. */
 void baseboard_gpio_table(const struct soc_amd_gpio **gpio, size_t *size);
 
@@ -41,7 +37,10 @@ void baseboard_romstage_gpio_table(const struct soc_amd_gpio **gpio, size_t *siz
 /* This function allows variant to override any GPIO init in romstage. */
 void variant_romstage_override_gpio_table(const struct soc_amd_gpio **gpio, size_t *size);
 
-/* Allow variants to override the DXIO Descriptors */
-void variant_get_dxio_descriptor(const fsp_dxio_descriptor **dxio_descs, size_t *dxio_num);
+/*
+ * This function allows a variant to override dxio descriptors passed to the FSP.
+ */
+void variant_get_dxio_descriptors(const fsp_dxio_descriptor **dxio_descriptor,
+					   size_t *num);
 
 #endif /* __BASEBOARD_VARIANTS_H__ */
diff --git a/src/mainboard/google/skyrim/variants/baseboard/port_descriptors.c b/src/mainboard/google/skyrim/variants/baseboard/port_descriptors.c
new file mode 100644
index 000000000000..296bb18ff21e
--- /dev/null
+++ b/src/mainboard/google/skyrim/variants/baseboard/port_descriptors.c
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <baseboard/variants.h>
+#include <baseboard/port_descriptors.h>
+#include <soc/platform_descriptors.h>
+
+enum baseboard_dxio_port_id {
+	BASEBOARD_DXIO_WLAN,
+	BASEBOARD_DXIO_SD,
+	BASEBOARD_DXIO_STORAGE,
+};
+
+static fsp_dxio_descriptor skyrim_mdn_dxio_descriptors[] = {
+	[BASEBOARD_DXIO_WLAN] = WLAN_DXIO_DESCRIPTOR,
+	[BASEBOARD_DXIO_SD] = SD_DXIO_DESCRIPTOR,
+	[BASEBOARD_DXIO_STORAGE] = NVME_DXIO_DESCRIPTOR,
+};
+
+__weak void variant_get_dxio_descriptors(const fsp_dxio_descriptor **dxio_descriptor, size_t *num)
+{
+	*dxio_descriptor = skyrim_mdn_dxio_descriptors;
+	*num = ARRAY_SIZE(skyrim_mdn_dxio_descriptors);
+}