R: Maurice Ma <maurice.ma@intel.com>
S: Maintained
W: https://slimbootloader.github.io/security/firmware-update.html
-F: drivers/platform/x86/intel-wmi-sbl-fw-update.c
+F: drivers/platform/x86/intel/wmi/sbl-fw-update.c
INTEL WMI THUNDERBOLT FORCE POWER DRIVER
L: Dell.Client.Kernel@dell.com
To compile this driver as a module, choose M here: the module will
be called uv_sysfs.
-config INTEL_WMI_SBL_FW_UPDATE
- tristate "Intel WMI Slim Bootloader firmware update signaling driver"
- depends on ACPI_WMI
- help
- Say Y here if you want to be able to use the WMI interface to signal
- Slim Bootloader to trigger update on next reboot.
-
- To compile this driver as a module, choose M here: the module will
- be called intel-wmi-sbl-fw-update.
-
config INTEL_WMI_THUNDERBOLT
tristate "Intel WMI thunderbolt force power driver"
depends on ACPI_WMI
# WMI drivers
obj-$(CONFIG_HUAWEI_WMI) += huawei-wmi.o
-obj-$(CONFIG_INTEL_WMI_SBL_FW_UPDATE) += intel-wmi-sbl-fw-update.o
obj-$(CONFIG_INTEL_WMI_THUNDERBOLT) += intel-wmi-thunderbolt.o
obj-$(CONFIG_MXM_WMI) += mxm-wmi.o
obj-$(CONFIG_PEAQ_WMI) += peaq-wmi.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Slim Bootloader(SBL) firmware update signaling driver
- *
- * Slim Bootloader is a small, open-source, non UEFI compliant, boot firmware
- * optimized for running on certain Intel platforms.
- *
- * SBL exposes an ACPI-WMI device via /sys/bus/wmi/devices/<INTEL_WMI_SBL_GUID>.
- * This driver further adds "firmware_update_request" device attribute.
- * This attribute normally has a value of 0 and userspace can signal SBL
- * to update firmware, on next reboot, by writing a value of 1.
- *
- * More details of SBL firmware update process is available at:
- * https://slimbootloader.github.io/security/firmware-update.html
- */
-
-#include <linux/acpi.h>
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/sysfs.h>
-#include <linux/wmi.h>
-
-#define INTEL_WMI_SBL_GUID "44FADEB1-B204-40F2-8581-394BBDC1B651"
-
-static int get_fwu_request(struct device *dev, u32 *out)
-{
- struct acpi_buffer result = {ACPI_ALLOCATE_BUFFER, NULL};
- union acpi_object *obj;
- acpi_status status;
-
- status = wmi_query_block(INTEL_WMI_SBL_GUID, 0, &result);
- if (ACPI_FAILURE(status)) {
- dev_err(dev, "wmi_query_block failed\n");
- return -ENODEV;
- }
-
- obj = (union acpi_object *)result.pointer;
- if (!obj || obj->type != ACPI_TYPE_INTEGER) {
- dev_warn(dev, "wmi_query_block returned invalid value\n");
- kfree(obj);
- return -EINVAL;
- }
-
- *out = obj->integer.value;
- kfree(obj);
-
- return 0;
-}
-
-static int set_fwu_request(struct device *dev, u32 in)
-{
- struct acpi_buffer input;
- acpi_status status;
- u32 value;
-
- value = in;
- input.length = sizeof(u32);
- input.pointer = &value;
-
- status = wmi_set_block(INTEL_WMI_SBL_GUID, 0, &input);
- if (ACPI_FAILURE(status)) {
- dev_err(dev, "wmi_set_block failed\n");
- return -ENODEV;
- }
-
- return 0;
-}
-
-static ssize_t firmware_update_request_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- u32 val;
- int ret;
-
- ret = get_fwu_request(dev, &val);
- if (ret)
- return ret;
-
- return sprintf(buf, "%d\n", val);
-}
-
-static ssize_t firmware_update_request_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- unsigned int val;
- int ret;
-
- ret = kstrtouint(buf, 0, &val);
- if (ret)
- return ret;
-
- /* May later be extended to support values other than 0 and 1 */
- if (val > 1)
- return -ERANGE;
-
- ret = set_fwu_request(dev, val);
- if (ret)
- return ret;
-
- return count;
-}
-static DEVICE_ATTR_RW(firmware_update_request);
-
-static struct attribute *firmware_update_attrs[] = {
- &dev_attr_firmware_update_request.attr,
- NULL
-};
-ATTRIBUTE_GROUPS(firmware_update);
-
-static int intel_wmi_sbl_fw_update_probe(struct wmi_device *wdev,
- const void *context)
-{
- dev_info(&wdev->dev, "Slim Bootloader signaling driver attached\n");
- return 0;
-}
-
-static void intel_wmi_sbl_fw_update_remove(struct wmi_device *wdev)
-{
- dev_info(&wdev->dev, "Slim Bootloader signaling driver removed\n");
-}
-
-static const struct wmi_device_id intel_wmi_sbl_id_table[] = {
- { .guid_string = INTEL_WMI_SBL_GUID },
- {}
-};
-MODULE_DEVICE_TABLE(wmi, intel_wmi_sbl_id_table);
-
-static struct wmi_driver intel_wmi_sbl_fw_update_driver = {
- .driver = {
- .name = "intel-wmi-sbl-fw-update",
- .dev_groups = firmware_update_groups,
- },
- .probe = intel_wmi_sbl_fw_update_probe,
- .remove = intel_wmi_sbl_fw_update_remove,
- .id_table = intel_wmi_sbl_id_table,
-};
-module_wmi_driver(intel_wmi_sbl_fw_update_driver);
-
-MODULE_AUTHOR("Jithu Joseph <jithu.joseph@intel.com>");
-MODULE_DESCRIPTION("Slim Bootloader firmware update signaling driver");
-MODULE_LICENSE("GPL v2");
source "drivers/platform/x86/intel/pmt/Kconfig"
source "drivers/platform/x86/intel/speed_select_if/Kconfig"
source "drivers/platform/x86/intel/telemetry/Kconfig"
+source "drivers/platform/x86/intel/wmi/Kconfig"
config INTEL_HID_EVENT
tristate "Intel HID Event"
obj-$(CONFIG_INTEL_PMT_CLASS) += pmt/
obj-$(CONFIG_INTEL_SPEED_SELECT_INTERFACE) += speed_select_if/
obj-$(CONFIG_INTEL_TELEMETRY) += telemetry/
+obj-$(CONFIG_INTEL_WMI) += wmi/
# Intel input drivers
intel-hid-y := hid.o
--- /dev/null
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Intel x86 Platform Specific Drivers
+#
+
+config INTEL_WMI
+ bool
+
+config INTEL_WMI_SBL_FW_UPDATE
+ tristate "Intel WMI Slim Bootloader firmware update signaling driver"
+ depends on ACPI_WMI
+ select INTEL_WMI
+ help
+ Say Y here if you want to be able to use the WMI interface to signal
+ Slim Bootloader to trigger update on next reboot.
+
+ To compile this driver as a module, choose M here: the module will
+ be called intel-wmi-sbl-fw-update.
--- /dev/null
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Intel x86 Platform Specific Drivers
+#
+
+intel-wmi-sbl-fw-update-y := sbl-fw-update.o
+obj-$(CONFIG_INTEL_WMI_SBL_FW_UPDATE) += intel-wmi-sbl-fw-update.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Slim Bootloader(SBL) firmware update signaling driver
+ *
+ * Slim Bootloader is a small, open-source, non UEFI compliant, boot firmware
+ * optimized for running on certain Intel platforms.
+ *
+ * SBL exposes an ACPI-WMI device via /sys/bus/wmi/devices/<INTEL_WMI_SBL_GUID>.
+ * This driver further adds "firmware_update_request" device attribute.
+ * This attribute normally has a value of 0 and userspace can signal SBL
+ * to update firmware, on next reboot, by writing a value of 1.
+ *
+ * More details of SBL firmware update process is available at:
+ * https://slimbootloader.github.io/security/firmware-update.html
+ */
+
+#include <linux/acpi.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/wmi.h>
+
+#define INTEL_WMI_SBL_GUID "44FADEB1-B204-40F2-8581-394BBDC1B651"
+
+static int get_fwu_request(struct device *dev, u32 *out)
+{
+ struct acpi_buffer result = {ACPI_ALLOCATE_BUFFER, NULL};
+ union acpi_object *obj;
+ acpi_status status;
+
+ status = wmi_query_block(INTEL_WMI_SBL_GUID, 0, &result);
+ if (ACPI_FAILURE(status)) {
+ dev_err(dev, "wmi_query_block failed\n");
+ return -ENODEV;
+ }
+
+ obj = (union acpi_object *)result.pointer;
+ if (!obj || obj->type != ACPI_TYPE_INTEGER) {
+ dev_warn(dev, "wmi_query_block returned invalid value\n");
+ kfree(obj);
+ return -EINVAL;
+ }
+
+ *out = obj->integer.value;
+ kfree(obj);
+
+ return 0;
+}
+
+static int set_fwu_request(struct device *dev, u32 in)
+{
+ struct acpi_buffer input;
+ acpi_status status;
+ u32 value;
+
+ value = in;
+ input.length = sizeof(u32);
+ input.pointer = &value;
+
+ status = wmi_set_block(INTEL_WMI_SBL_GUID, 0, &input);
+ if (ACPI_FAILURE(status)) {
+ dev_err(dev, "wmi_set_block failed\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static ssize_t firmware_update_request_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ u32 val;
+ int ret;
+
+ ret = get_fwu_request(dev, &val);
+ if (ret)
+ return ret;
+
+ return sprintf(buf, "%d\n", val);
+}
+
+static ssize_t firmware_update_request_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned int val;
+ int ret;
+
+ ret = kstrtouint(buf, 0, &val);
+ if (ret)
+ return ret;
+
+ /* May later be extended to support values other than 0 and 1 */
+ if (val > 1)
+ return -ERANGE;
+
+ ret = set_fwu_request(dev, val);
+ if (ret)
+ return ret;
+
+ return count;
+}
+static DEVICE_ATTR_RW(firmware_update_request);
+
+static struct attribute *firmware_update_attrs[] = {
+ &dev_attr_firmware_update_request.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(firmware_update);
+
+static int intel_wmi_sbl_fw_update_probe(struct wmi_device *wdev,
+ const void *context)
+{
+ dev_info(&wdev->dev, "Slim Bootloader signaling driver attached\n");
+ return 0;
+}
+
+static void intel_wmi_sbl_fw_update_remove(struct wmi_device *wdev)
+{
+ dev_info(&wdev->dev, "Slim Bootloader signaling driver removed\n");
+}
+
+static const struct wmi_device_id intel_wmi_sbl_id_table[] = {
+ { .guid_string = INTEL_WMI_SBL_GUID },
+ {}
+};
+MODULE_DEVICE_TABLE(wmi, intel_wmi_sbl_id_table);
+
+static struct wmi_driver intel_wmi_sbl_fw_update_driver = {
+ .driver = {
+ .name = "intel-wmi-sbl-fw-update",
+ .dev_groups = firmware_update_groups,
+ },
+ .probe = intel_wmi_sbl_fw_update_probe,
+ .remove = intel_wmi_sbl_fw_update_remove,
+ .id_table = intel_wmi_sbl_id_table,
+};
+module_wmi_driver(intel_wmi_sbl_fw_update_driver);
+
+MODULE_AUTHOR("Jithu Joseph <jithu.joseph@intel.com>");
+MODULE_DESCRIPTION("Slim Bootloader firmware update signaling driver");
+MODULE_LICENSE("GPL v2");
projects / linux-2.6-microblaze.git / commitdiff