wifi: Add support for wifi time average SAR config

Add support for the WTAS ACPI BIOS configuration table as per the
connectivity document:
559910_Intel_Connectivity_Platforms_BIOS_Guidelines_Rev6_4.pdf

BUG=b:193665559
TEST=Generated SAR file with the WTAS related configuration values and
verified that the SSDT has the WTAS ACPI table.

Change-Id: I42cf3cba7974e6db0e05de30846ef103a15fd584
Signed-off-by: Sugnan Prabhu S <sugnan.prabhu.s@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/57061
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/src/drivers/wifi/generic/acpi.c b/src/drivers/wifi/generic/acpi.c
index ed5b632216..5636abca68 100644
--- a/src/drivers/wifi/generic/acpi.c
+++ b/src/drivers/wifi/generic/acpi.c
@@ -267,6 +267,58 @@ static void sar_emit_ppag(struct gain_profile *ppag)
 	acpigen_write_package_end();
 }
 
+static void sar_emit_wtas(struct avg_profile *wtas)
+{
+	int i;
+	size_t package_size;
+
+	if (wtas == NULL)
+		return;
+
+	/*
+	 * Name (WTAS, Package() {
+	 * {
+	 *   Revision,
+	 *   Package()
+	 *   {
+	 *     DomainType,            // 0x7:WiFi
+	 *     WifiTASSelection,      // Enable/Disable the TAS feature
+	 *     WifiTASListEntries,    // No. of blocked countries not approved by OEM to
+	 *     BlockedListEntry1,        support this feature
+	 *     BlockedListEntry2,
+	 *     BlockedListEntry3,
+	 *     BlockedListEntry4,
+	 *     BlockedListEntry5,
+	 *     BlockedListEntry6,
+	 *     BlockedListEntry7,
+	 *     BlockedListEntry8,
+	 *     BlockedListEntry9,
+	 *     BlockedListEntry10,
+	 *     BlockedListEntry11,
+	 *     BlockedListEntry12,
+	 *     BlockedListEntry13,
+	 *     BlockedListEntry14,
+	 *     BlockedListEntry15,
+	 *     BlockedListEntry16,
+	 *   }
+	 * })
+	 */
+	package_size = 1 + 1 + 1 + MAX_DENYLIST_ENTRY;
+
+	acpigen_write_name("WTAS");
+	acpigen_write_package(2);
+	acpigen_write_dword(wtas->revision);
+	acpigen_write_package(package_size);
+	acpigen_write_dword(DOMAIN_TYPE_WIFI);
+	acpigen_write_dword(wtas->tas_selection);
+	acpigen_write_dword(wtas->tas_list_size);
+	for (i = 0; i < MAX_DENYLIST_ENTRY; i++)
+		acpigen_write_byte(wtas->deny_list_entry[i]);
+
+	acpigen_write_package_end();
+	acpigen_write_package_end();
+}
+
 static void emit_sar_acpi_structures(const struct device *dev)
 {
 	union wifi_sar_limits sar_limits;
@@ -288,6 +340,7 @@ static void emit_sar_acpi_structures(const struct device *dev)
 	sar_emit_ewrd(sar_limits.sar);
 	sar_emit_wgds(sar_limits.wgds);
 	sar_emit_ppag(sar_limits.ppag);
+	sar_emit_wtas(sar_limits.wtas);
 
 	free(sar_limits.sar);
 }