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-rw-r--r--src/drivers/intel/wifi/Kconfig24
-rw-r--r--src/drivers/intel/wifi/chip.h32
-rw-r--r--src/drivers/intel/wifi/wifi.c71
3 files changed, 127 insertions, 0 deletions
diff --git a/src/drivers/intel/wifi/Kconfig b/src/drivers/intel/wifi/Kconfig
index 330de6c6dc..1e6be6dfd0 100644
--- a/src/drivers/intel/wifi/Kconfig
+++ b/src/drivers/intel/wifi/Kconfig
@@ -5,3 +5,27 @@ config DRIVERS_INTEL_WIFI
help
When enabled, add identifiers in ACPI and SMBIOS tables to
make OS drivers work with certain Intel PCI-e WiFi chipsets.
+
+config USE_SAR
+ bool
+ default n
+ help
+ Enable it when wifi driver uses SAR configuration feature.
+ VPD entry "wifi_sar" is required to support it.
+
+config SAR_ENABLE
+ bool
+ default n
+ depends on USE_SAR
+
+config DSAR_ENABLE
+ bool
+ default n
+ depends on USE_SAR
+
+config DSAR_SET_NUM
+ hex "Number of SAR sets when D-SAR is enabled"
+ default 0x3
+ depends on USE_SAR
+ help
+ There can be up to 3 optional SAR table sets.
diff --git a/src/drivers/intel/wifi/chip.h b/src/drivers/intel/wifi/chip.h
index 117d39caf0..0871874ba7 100644
--- a/src/drivers/intel/wifi/chip.h
+++ b/src/drivers/intel/wifi/chip.h
@@ -1,3 +1,35 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016-2017 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _WIFI_CHIP_H_
+#define _WIFI_CHIP_H_
+
+/* WRDS Spec Revision */
+#define WRDS_REVISION 0x0
+
+/* EWRD Spec Revision */
+#define EWRD_REVISION 0x0
+
+/* WRDS Domain type */
+#define WRDS_DOMAIN_TYPE_WIFI 0x7
+
+/* EWRD Domain type */
+#define EWRD_DOMAIN_TYPE_WIFI 0x7
+
struct drivers_intel_wifi_config {
unsigned wake; /* Wake pin for ACPI _PRW */
};
+
+#endif /* _WIFI_CHIP_H_ */
diff --git a/src/drivers/intel/wifi/wifi.c b/src/drivers/intel/wifi/wifi.c
index 789d0d5431..06bc54c788 100644
--- a/src/drivers/intel/wifi/wifi.c
+++ b/src/drivers/intel/wifi/wifi.c
@@ -20,6 +20,7 @@
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
+#include <sar.h>
#include <smbios.h>
#include <string.h>
#include <wrdd.h>
@@ -59,6 +60,72 @@ static int smbios_write_wifi(struct device *dev, int *handle,
#endif
#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+static void emit_sar_acpi_structures(void)
+{
+ int i, j, package_size;
+ struct wifi_sar_limits sar_limits;
+
+ /* Retrieve the sar limits data */
+ if (get_wifi_sar_limits(&sar_limits) < 0) {
+ printk(BIOS_ERR, "Error: failed from getting SAR limits!\n");
+ return;
+ }
+
+ /*
+ * Name ("WRDS", Package () {
+ * Revision,
+ * Package () {
+ * Domain Type, // 0x7:WiFi
+ * WiFi SAR BIOS, // BIOS SAR Enable/disable
+ * SAR Table Set // Set#1 of SAR Table (10 bytes)
+ * }
+ * })
+ */
+ acpigen_write_name("WRDS");
+ acpigen_write_package(2);
+ acpigen_write_dword(WRDS_REVISION);
+ /* Emit 'Domain Type' + 'WiFi SAR BIOS' + 10 bytes for Set#1 */
+ package_size = 1 + 1 + BYTES_PER_SAR_LIMIT;
+ acpigen_write_package(package_size);
+ acpigen_write_dword(WRDS_DOMAIN_TYPE_WIFI);
+ acpigen_write_dword(CONFIG_SAR_ENABLE);
+ for (i = 0; i < BYTES_PER_SAR_LIMIT; i++)
+ acpigen_write_byte(sar_limits.sar_limit[0][i]);
+ acpigen_pop_len();
+ acpigen_pop_len();
+
+ /*
+ * Name ("EWRD", Package () {
+ * Revision,
+ * Package () {
+ * Domain Type, // 0x7:WiFi
+ * Dynamic SAR Enable, // Dynamic SAR Enable/disable
+ * Extended SAR sets, // Number of optional SAR table sets
+ * SAR Table Set, // Set#2 of SAR Table (10 bytes)
+ * SAR Table Set, // Set#3 of SAR Table (10 bytes)
+ * SAR Table Set // Set#4 of SAR Table (10 bytes)
+ * }
+ * })
+ */
+ acpigen_write_name("EWRD");
+ acpigen_write_package(2);
+ acpigen_write_dword(EWRD_REVISION);
+ /*
+ * Emit 'Domain Type' + "Dynamic SAR Enable' + 'Extended SAR sets'
+ * + number of bytes for Set#2 & 3 & 4
+ */
+ package_size = 1 + 1 + 1 + (NUM_SAR_LIMITS - 1) * BYTES_PER_SAR_LIMIT;
+ acpigen_write_package(package_size);
+ acpigen_write_dword(EWRD_DOMAIN_TYPE_WIFI);
+ acpigen_write_dword(CONFIG_DSAR_ENABLE);
+ acpigen_write_dword(CONFIG_DSAR_SET_NUM);
+ for (i = 1; i < NUM_SAR_LIMITS; i++)
+ for (j = 0; j < BYTES_PER_SAR_LIMIT; j++)
+ acpigen_write_byte(sar_limits.sar_limit[i][j]);
+ acpigen_pop_len();
+ acpigen_pop_len();
+}
+
static void intel_wifi_fill_ssdt(struct device *dev)
{
struct drivers_intel_wifi_config *config = dev->chip_info;
@@ -105,6 +172,10 @@ static void intel_wifi_fill_ssdt(struct device *dev)
acpigen_pop_len();
}
+ /* Fill Wifi sar related ACPI structures */
+ if (IS_ENABLED(CONFIG_USE_SAR))
+ emit_sar_acpi_structures();
+
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */