--- /dev/null
+/*
+ * Alienware AlienFX control
+ *
+ * Copyright (C) 2014 Dell Inc <mario_limonciello@dell.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/acpi.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/dmi.h>
+#include <linux/acpi.h>
+#include <linux/leds.h>
+
+#define LEGACY_CONTROL_GUID "A90597CE-A997-11DA-B012-B622A1EF5492"
+#define LEGACY_POWER_CONTROL_GUID "A80593CE-A997-11DA-B012-B622A1EF5492"
+#define WMAX_CONTROL_GUID "A70591CE-A997-11DA-B012-B622A1EF5492"
+
+#define WMAX_METHOD_HDMI_SOURCE 0x1
+#define WMAX_METHOD_HDMI_STATUS 0x2
+#define WMAX_METHOD_BRIGHTNESS 0x3
+#define WMAX_METHOD_ZONE_CONTROL 0x4
+
+MODULE_AUTHOR("Mario Limonciello <mario_limonciello@dell.com>");
+MODULE_DESCRIPTION("Alienware special feature control");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("wmi:" LEGACY_CONTROL_GUID);
+MODULE_ALIAS("wmi:" WMAX_CONTROL_GUID);
+
+enum INTERFACE_FLAGS {
+ LEGACY,
+ WMAX,
+};
+
+enum LEGACY_CONTROL_STATES {
+ LEGACY_RUNNING = 1,
+ LEGACY_BOOTING = 0,
+ LEGACY_SUSPEND = 3,
+};
+
+enum WMAX_CONTROL_STATES {
+ WMAX_RUNNING = 0xFF,
+ WMAX_BOOTING = 0,
+ WMAX_SUSPEND = 3,
+};
+
+struct quirk_entry {
+ u8 num_zones;
+};
+
+static struct quirk_entry *quirks;
+
+static struct quirk_entry quirk_unknown = {
+ .num_zones = 2,
+};
+
+static struct quirk_entry quirk_x51_family = {
+ .num_zones = 3,
+};
+
+static int dmi_matched(const struct dmi_system_id *dmi)
+{
+ quirks = dmi->driver_data;
+ return 1;
+}
+
+static struct dmi_system_id alienware_quirks[] = {
+ {
+ .callback = dmi_matched,
+ .ident = "Alienware X51 R1",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51"),
+ },
+ .driver_data = &quirk_x51_family,
+ },
+ {
+ .callback = dmi_matched,
+ .ident = "Alienware X51 R2",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51 R2"),
+ },
+ .driver_data = &quirk_x51_family,
+ },
+ {}
+};
+
+struct color_platform {
+ u8 blue;
+ u8 green;
+ u8 red;
+} __packed;
+
+struct platform_zone {
+ u8 location;
+ struct device_attribute *attr;
+ struct color_platform colors;
+};
+
+struct wmax_brightness_args {
+ u32 led_mask;
+ u32 percentage;
+};
+
+struct hdmi_args {
+ u8 arg;
+};
+
+struct legacy_led_args {
+ struct color_platform colors;
+ u8 brightness;
+ u8 state;
+} __packed;
+
+struct wmax_led_args {
+ u32 led_mask;
+ struct color_platform colors;
+ u8 state;
+} __packed;
+
+static struct platform_device *platform_device;
+static struct device_attribute *zone_dev_attrs;
+static struct attribute **zone_attrs;
+static struct platform_zone *zone_data;
+
+static struct platform_driver platform_driver = {
+ .driver = {
+ .name = "alienware-wmi",
+ .owner = THIS_MODULE,
+ }
+};
+
+static struct attribute_group zone_attribute_group = {
+ .name = "rgb_zones",
+};
+
+static u8 interface;
+static u8 lighting_control_state;
+static u8 global_brightness;
+
+/*
+ * Helpers used for zone control
+*/
+static int parse_rgb(const char *buf, struct platform_zone *zone)
+{
+ long unsigned int rgb;
+ int ret;
+ union color_union {
+ struct color_platform cp;
+ int package;
+ } repackager;
+
+ ret = kstrtoul(buf, 16, &rgb);
+ if (ret)
+ return ret;
+
+ /* RGB triplet notation is 24-bit hexadecimal */
+ if (rgb > 0xFFFFFF)
+ return -EINVAL;
+
+ repackager.package = rgb & 0x0f0f0f0f;
+ pr_debug("alienware-wmi: r: %d g:%d b: %d\n",
+ repackager.cp.red, repackager.cp.green, repackager.cp.blue);
+ zone->colors = repackager.cp;
+ return 0;
+}
+
+static struct platform_zone *match_zone(struct device_attribute *attr)
+{
+ int i;
+ for (i = 0; i < quirks->num_zones; i++) {
+ if ((struct device_attribute *)zone_data[i].attr == attr) {
+ pr_debug("alienware-wmi: matched zone location: %d\n",
+ zone_data[i].location);
+ return &zone_data[i];
+ }
+ }
+ return NULL;
+}
+
+/*
+ * Individual RGB zone control
+*/
+static int alienware_update_led(struct platform_zone *zone)
+{
+ int method_id;
+ acpi_status status;
+ char *guid;
+ struct acpi_buffer input;
+ struct legacy_led_args legacy_args;
+ struct wmax_led_args wmax_args;
+ if (interface == WMAX) {
+ wmax_args.led_mask = 1 << zone->location;
+ wmax_args.colors = zone->colors;
+ wmax_args.state = lighting_control_state;
+ guid = WMAX_CONTROL_GUID;
+ method_id = WMAX_METHOD_ZONE_CONTROL;
+
+ input.length = (acpi_size) sizeof(wmax_args);
+ input.pointer = &wmax_args;
+ } else {
+ legacy_args.colors = zone->colors;
+ legacy_args.brightness = global_brightness;
+ legacy_args.state = 0;
+ if (lighting_control_state == LEGACY_BOOTING ||
+ lighting_control_state == LEGACY_SUSPEND) {
+ guid = LEGACY_POWER_CONTROL_GUID;
+ legacy_args.state = lighting_control_state;
+ } else
+ guid = LEGACY_CONTROL_GUID;
+ method_id = zone->location + 1;
+
+ input.length = (acpi_size) sizeof(legacy_args);
+ input.pointer = &legacy_args;
+ }
+ pr_debug("alienware-wmi: guid %s method %d\n", guid, method_id);
+
+ status = wmi_evaluate_method(guid, 1, method_id, &input, NULL);
+ if (ACPI_FAILURE(status))
+ pr_err("alienware-wmi: zone set failure: %u\n", status);
+ return ACPI_FAILURE(status);
+}
+
+static ssize_t zone_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_zone *target_zone;
+ target_zone = match_zone(attr);
+ if (target_zone == NULL)
+ return sprintf(buf, "red: -1, green: -1, blue: -1\n");
+ return sprintf(buf, "red: %d, green: %d, blue: %d\n",
+ target_zone->colors.red,
+ target_zone->colors.green, target_zone->colors.blue);
+
+}
+
+static ssize_t zone_set(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct platform_zone *target_zone;
+ int ret;
+ target_zone = match_zone(attr);
+ if (target_zone == NULL) {
+ pr_err("alienware-wmi: invalid target zone\n");
+ return 1;
+ }
+ ret = parse_rgb(buf, target_zone);
+ if (ret)
+ return ret;
+ ret = alienware_update_led(target_zone);
+ return ret ? ret : count;
+}
+
+/*
+ * LED Brightness (Global)
+*/
+static int wmax_brightness(int brightness)
+{
+ acpi_status status;
+ struct acpi_buffer input;
+ struct wmax_brightness_args args = {
+ .led_mask = 0xFF,
+ .percentage = brightness,
+ };
+ input.length = (acpi_size) sizeof(args);
+ input.pointer = &args;
+ status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
+ WMAX_METHOD_BRIGHTNESS, &input, NULL);
+ if (ACPI_FAILURE(status))
+ pr_err("alienware-wmi: brightness set failure: %u\n", status);
+ return ACPI_FAILURE(status);
+}
+
+static void global_led_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
+{
+ int ret;
+ global_brightness = brightness;
+ if (interface == WMAX)
+ ret = wmax_brightness(brightness);
+ else
+ ret = alienware_update_led(&zone_data[0]);
+ if (ret)
+ pr_err("LED brightness update failed\n");
+}
+
+static enum led_brightness global_led_get(struct led_classdev *led_cdev)
+{
+ return global_brightness;
+}
+
+static struct led_classdev global_led = {
+ .brightness_set = global_led_set,
+ .brightness_get = global_led_get,
+ .name = "alienware::global_brightness",
+};
+
+/*
+ * Lighting control state device attribute (Global)
+*/
+static ssize_t show_control_state(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ if (lighting_control_state == LEGACY_BOOTING)
+ return scnprintf(buf, PAGE_SIZE, "[booting] running suspend\n");
+ else if (lighting_control_state == LEGACY_SUSPEND)
+ return scnprintf(buf, PAGE_SIZE, "booting running [suspend]\n");
+ return scnprintf(buf, PAGE_SIZE, "booting [running] suspend\n");
+}
+
+static ssize_t store_control_state(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ long unsigned int val;
+ if (strcmp(buf, "booting\n") == 0)
+ val = LEGACY_BOOTING;
+ else if (strcmp(buf, "suspend\n") == 0)
+ val = LEGACY_SUSPEND;
+ else if (interface == LEGACY)
+ val = LEGACY_RUNNING;
+ else
+ val = WMAX_RUNNING;
+ lighting_control_state = val;
+ pr_debug("alienware-wmi: updated control state to %d\n",
+ lighting_control_state);
+ return count;
+}
+
+static DEVICE_ATTR(lighting_control_state, 0644, show_control_state,
+ store_control_state);
+
+static int alienware_zone_init(struct platform_device *dev)
+{
+ int i;
+ char buffer[10];
+ char *name;
+
+ if (interface == WMAX) {
+ global_led.max_brightness = 100;
+ lighting_control_state = WMAX_RUNNING;
+ } else if (interface == LEGACY) {
+ global_led.max_brightness = 0x0F;
+ lighting_control_state = LEGACY_RUNNING;
+ }
+ global_brightness = global_led.max_brightness;
+
+ /*
+ * - zone_dev_attrs num_zones + 1 is for individual zones and then
+ * null terminated
+ * - zone_attrs num_zones + 2 is for all attrs in zone_dev_attrs +
+ * the lighting control + null terminated
+ * - zone_data num_zones is for the distinct zones
+ */
+ zone_dev_attrs =
+ kzalloc(sizeof(struct device_attribute) * (quirks->num_zones + 1),
+ GFP_KERNEL);
+ zone_attrs =
+ kzalloc(sizeof(struct attribute *) * (quirks->num_zones + 2),
+ GFP_KERNEL);
+ zone_data =
+ kzalloc(sizeof(struct platform_zone) * (quirks->num_zones),
+ GFP_KERNEL);
+
+ for (i = 0; i < quirks->num_zones; i++) {
+ sprintf(buffer, "zone%02X", i);
+ name = kstrdup(buffer, GFP_KERNEL);
+ if (name == NULL)
+ return 1;
+ sysfs_attr_init(&zone_dev_attrs[i].attr);
+ zone_dev_attrs[i].attr.name = name;
+ zone_dev_attrs[i].attr.mode = 0644;
+ zone_dev_attrs[i].show = zone_show;
+ zone_dev_attrs[i].store = zone_set;
+ zone_data[i].location = i;
+ zone_attrs[i] = &zone_dev_attrs[i].attr;
+ zone_data[i].attr = &zone_dev_attrs[i];
+ }
+ zone_attrs[quirks->num_zones] = &dev_attr_lighting_control_state.attr;
+ zone_attribute_group.attrs = zone_attrs;
+
+ led_classdev_register(&dev->dev, &global_led);
+
+ return sysfs_create_group(&dev->dev.kobj, &zone_attribute_group);
+}
+
+static void alienware_zone_exit(struct platform_device *dev)
+{
+ sysfs_remove_group(&dev->dev.kobj, &zone_attribute_group);
+ led_classdev_unregister(&global_led);
+ if (zone_dev_attrs) {
+ int i;
+ for (i = 0; i < quirks->num_zones; i++)
+ kfree(zone_dev_attrs[i].attr.name);
+ }
+ kfree(zone_dev_attrs);
+ kfree(zone_data);
+ kfree(zone_attrs);
+}
+
+/*
+ The HDMI mux sysfs node indicates the status of the HDMI input mux.
+ It can toggle between standard system GPU output and HDMI input.
+*/
+static ssize_t show_hdmi(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ acpi_status status;
+ struct acpi_buffer input;
+ union acpi_object *obj;
+ u32 tmp = 0;
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+ struct hdmi_args in_args = {
+ .arg = 0,
+ };
+ input.length = (acpi_size) sizeof(in_args);
+ input.pointer = &in_args;
+ status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
+ WMAX_METHOD_HDMI_STATUS, &input, &output);
+
+ if (ACPI_SUCCESS(status)) {
+ obj = (union acpi_object *)output.pointer;
+ if (obj && obj->type == ACPI_TYPE_INTEGER)
+ tmp = (u32) obj->integer.value;
+ if (tmp == 1)
+ return scnprintf(buf, PAGE_SIZE,
+ "[input] gpu unknown\n");
+ else if (tmp == 2)
+ return scnprintf(buf, PAGE_SIZE,
+ "input [gpu] unknown\n");
+ }
+ pr_err("alienware-wmi: unknown HDMI status: %d\n", status);
+ return scnprintf(buf, PAGE_SIZE, "input gpu [unknown]\n");
+}
+
+static ssize_t toggle_hdmi(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct acpi_buffer input;
+ acpi_status status;
+ struct hdmi_args args;
+ if (strcmp(buf, "gpu\n") == 0)
+ args.arg = 1;
+ else if (strcmp(buf, "input\n") == 0)
+ args.arg = 2;
+ else
+ args.arg = 3;
+ pr_debug("alienware-wmi: setting hdmi to %d : %s", args.arg, buf);
+ input.length = (acpi_size) sizeof(args);
+ input.pointer = &args;
+ status = wmi_evaluate_method(WMAX_CONTROL_GUID, 1,
+ WMAX_METHOD_HDMI_SOURCE, &input, NULL);
+ if (ACPI_FAILURE(status))
+ pr_err("alienware-wmi: HDMI toggle failed: results: %u\n",
+ status);
+ return count;
+}
+
+static DEVICE_ATTR(hdmi, S_IRUGO | S_IWUSR, show_hdmi, toggle_hdmi);
+
+static void remove_hdmi(struct platform_device *device)
+{
+ device_remove_file(&device->dev, &dev_attr_hdmi);
+}
+
+static int create_hdmi(void)
+{
+ int ret = -ENOMEM;
+ ret = device_create_file(&platform_device->dev, &dev_attr_hdmi);
+ if (ret)
+ goto error_create_hdmi;
+ return 0;
+
+error_create_hdmi:
+ remove_hdmi(platform_device);
+ return ret;
+}
+
+static int __init alienware_wmi_init(void)
+{
+ int ret;
+
+ if (wmi_has_guid(LEGACY_CONTROL_GUID))
+ interface = LEGACY;
+ else if (wmi_has_guid(WMAX_CONTROL_GUID))
+ interface = WMAX;
+ else {
+ pr_warn("alienware-wmi: No known WMI GUID found\n");
+ return -ENODEV;
+ }
+
+ dmi_check_system(alienware_quirks);
+ if (quirks == NULL)
+ quirks = &quirk_unknown;
+
+ ret = platform_driver_register(&platform_driver);
+ if (ret)
+ goto fail_platform_driver;
+ platform_device = platform_device_alloc("alienware-wmi", -1);
+ if (!platform_device) {
+ ret = -ENOMEM;
+ goto fail_platform_device1;
+ }
+ ret = platform_device_add(platform_device);
+ if (ret)
+ goto fail_platform_device2;
+
+ if (interface == WMAX) {
+ ret = create_hdmi();
+ if (ret)
+ goto fail_prep_hdmi;
+ }
+
+ ret = alienware_zone_init(platform_device);
+ if (ret)
+ goto fail_prep_zones;
+
+ return 0;
+
+fail_prep_zones:
+ alienware_zone_exit(platform_device);
+fail_prep_hdmi:
+ platform_device_del(platform_device);
+fail_platform_device2:
+ platform_device_put(platform_device);
+fail_platform_device1:
+ platform_driver_unregister(&platform_driver);
+fail_platform_driver:
+ return ret;
+}
+
+module_init(alienware_wmi_init);
+
+static void __exit alienware_wmi_exit(void)
+{
+ alienware_zone_exit(platform_device);
+ remove_hdmi(platform_device);
+ if (platform_device) {
+ platform_device_unregister(platform_device);
+ platform_driver_unregister(&platform_driver);
+ }
+}
+
+module_exit(alienware_wmi_exit);
projects / mirror_ubuntu-bionic-kernel.git / commitdiff