diff options
Diffstat (limited to 'drivers/platform/x86/system76_acpi.c')
| -rw-r--r-- | drivers/platform/x86/system76_acpi.c | 427 |
1 files changed, 411 insertions, 16 deletions
diff --git a/drivers/platform/x86/system76_acpi.c b/drivers/platform/x86/system76_acpi.c index c14fd22ba196..8b292ee95a14 100644 --- a/drivers/platform/x86/system76_acpi.c +++ b/drivers/platform/x86/system76_acpi.c @@ -10,13 +10,20 @@ */ #include <linux/acpi.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> #include <linux/init.h> +#include <linux/input.h> #include <linux/kernel.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/pci_ids.h> +#include <linux/power_supply.h> +#include <linux/sysfs.h> #include <linux/types.h> +#include <acpi/battery.h> + struct system76_data { struct acpi_device *acpi_dev; struct led_classdev ap_led; @@ -24,6 +31,10 @@ struct system76_data { enum led_brightness kb_brightness; enum led_brightness kb_toggle_brightness; int kb_color; + struct device *therm; + union acpi_object *nfan; + union acpi_object *ntmp; + struct input_dev *input; }; static const struct acpi_device_id device_ids[] = { @@ -63,9 +74,57 @@ static int system76_get(struct system76_data *data, char *method) handle = acpi_device_handle(data->acpi_dev); status = acpi_evaluate_integer(handle, method, NULL, &ret); if (ACPI_SUCCESS(status)) - return (int)ret; - else - return -1; + return ret; + return -ENODEV; +} + +// Get a System76 ACPI device value by name with index +static int system76_get_index(struct system76_data *data, char *method, int index) +{ + union acpi_object obj; + struct acpi_object_list obj_list; + acpi_handle handle; + acpi_status status; + unsigned long long ret = 0; + + obj.type = ACPI_TYPE_INTEGER; + obj.integer.value = index; + obj_list.count = 1; + obj_list.pointer = &obj; + + handle = acpi_device_handle(data->acpi_dev); + status = acpi_evaluate_integer(handle, method, &obj_list, &ret); + if (ACPI_SUCCESS(status)) + return ret; + return -ENODEV; +} + +// Get a System76 ACPI device object by name +static int system76_get_object(struct system76_data *data, char *method, union acpi_object **obj) +{ + acpi_handle handle; + acpi_status status; + struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL }; + + handle = acpi_device_handle(data->acpi_dev); + status = acpi_evaluate_object(handle, method, NULL, &buf); + if (ACPI_SUCCESS(status)) { + *obj = buf.pointer; + return 0; + } + + return -ENODEV; +} + +// Get a name from a System76 ACPI device object +static char *system76_name(union acpi_object *obj, int index) +{ + if (obj && obj->type == ACPI_TYPE_PACKAGE && index <= obj->package.count) { + if (obj->package.elements[index].type == ACPI_TYPE_STRING) + return obj->package.elements[index].string.pointer; + } + + return NULL; } // Set a System76 ACPI device value by name @@ -88,6 +147,154 @@ static int system76_set(struct system76_data *data, char *method, int value) return -1; } +#define BATTERY_THRESHOLD_INVALID 0xFF + +enum { + THRESHOLD_START, + THRESHOLD_END, +}; + +static ssize_t battery_get_threshold(int which, char *buf) +{ + struct acpi_object_list input; + union acpi_object param; + acpi_handle handle; + acpi_status status; + unsigned long long ret = BATTERY_THRESHOLD_INVALID; + + handle = ec_get_handle(); + if (!handle) + return -ENODEV; + + input.count = 1; + input.pointer = ¶m; + // Start/stop selection + param.type = ACPI_TYPE_INTEGER; + param.integer.value = which; + + status = acpi_evaluate_integer(handle, "GBCT", &input, &ret); + if (ACPI_FAILURE(status)) + return -EIO; + if (ret == BATTERY_THRESHOLD_INVALID) + return -EINVAL; + + return sysfs_emit(buf, "%d\n", (int)ret); +} + +static ssize_t battery_set_threshold(int which, const char *buf, size_t count) +{ + struct acpi_object_list input; + union acpi_object params[2]; + acpi_handle handle; + acpi_status status; + unsigned int value; + int ret; + + handle = ec_get_handle(); + if (!handle) + return -ENODEV; + + ret = kstrtouint(buf, 10, &value); + if (ret) + return ret; + + if (value > 100) + return -EINVAL; + + input.count = 2; + input.pointer = params; + // Start/stop selection + params[0].type = ACPI_TYPE_INTEGER; + params[0].integer.value = which; + // Threshold value + params[1].type = ACPI_TYPE_INTEGER; + params[1].integer.value = value; + + status = acpi_evaluate_object(handle, "SBCT", &input, NULL); + if (ACPI_FAILURE(status)) + return -EIO; + + return count; +} + +static ssize_t charge_control_start_threshold_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return battery_get_threshold(THRESHOLD_START, buf); +} + +static ssize_t charge_control_start_threshold_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + return battery_set_threshold(THRESHOLD_START, buf, count); +} + +static DEVICE_ATTR_RW(charge_control_start_threshold); + +static ssize_t charge_control_end_threshold_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return battery_get_threshold(THRESHOLD_END, buf); +} + +static ssize_t charge_control_end_threshold_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + return battery_set_threshold(THRESHOLD_END, buf, count); +} + +static DEVICE_ATTR_RW(charge_control_end_threshold); + +static struct attribute *system76_battery_attrs[] = { + &dev_attr_charge_control_start_threshold.attr, + &dev_attr_charge_control_end_threshold.attr, + NULL, +}; + +ATTRIBUTE_GROUPS(system76_battery); + +static int system76_battery_add(struct power_supply *battery) +{ + // System76 EC only supports 1 battery + if (strcmp(battery->desc->name, "BAT0") != 0) + return -ENODEV; + + if (device_add_groups(&battery->dev, system76_battery_groups)) + return -ENODEV; + + return 0; +} + +static int system76_battery_remove(struct power_supply *battery) +{ + device_remove_groups(&battery->dev, system76_battery_groups); + return 0; +} + +static struct acpi_battery_hook system76_battery_hook = { + .add_battery = system76_battery_add, + .remove_battery = system76_battery_remove, + .name = "System76 Battery Extension", +}; + +static void system76_battery_init(void) +{ + acpi_handle handle; + + handle = ec_get_handle(); + if (handle && acpi_has_method(handle, "GBCT")) + battery_hook_register(&system76_battery_hook); +} + +static void system76_battery_exit(void) +{ + acpi_handle handle; + + handle = ec_get_handle(); + if (handle && acpi_has_method(handle, "GBCT")) + battery_hook_unregister(&system76_battery_hook); +} + // Get the airplane mode LED brightness static enum led_brightness ap_led_get(struct led_classdev *led) { @@ -141,7 +348,7 @@ static ssize_t kb_led_color_show( led = (struct led_classdev *)dev->driver_data; data = container_of(led, struct system76_data, kb_led); - return sprintf(buf, "%06X\n", data->kb_color); + return sysfs_emit(buf, "%06X\n", data->kb_color); } // Set the keyboard LED color @@ -169,7 +376,7 @@ static ssize_t kb_led_color_store( return size; } -static const struct device_attribute kb_led_color_dev_attr = { +static struct device_attribute dev_attr_kb_led_color = { .attr = { .name = "color", .mode = 0644, @@ -178,6 +385,13 @@ static const struct device_attribute kb_led_color_dev_attr = { .store = kb_led_color_store, }; +static struct attribute *system76_kb_led_color_attrs[] = { + &dev_attr_kb_led_color.attr, + NULL, +}; + +ATTRIBUTE_GROUPS(system76_kb_led_color); + // Notify that the keyboard LED was changed by hardware static void kb_led_notify(struct system76_data *data) { @@ -270,6 +484,155 @@ static void kb_led_hotkey_color(struct system76_data *data) kb_led_notify(data); } +static umode_t thermal_is_visible(const void *drvdata, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + const struct system76_data *data = drvdata; + + switch (type) { + case hwmon_fan: + case hwmon_pwm: + if (system76_name(data->nfan, channel)) + return 0444; + break; + + case hwmon_temp: + if (system76_name(data->ntmp, channel)) + return 0444; + break; + + default: + return 0; + } + + return 0; +} + +static int thermal_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, + int channel, long *val) +{ + struct system76_data *data = dev_get_drvdata(dev); + int raw; + + switch (type) { + case hwmon_fan: + if (attr == hwmon_fan_input) { + raw = system76_get_index(data, "GFAN", channel); + if (raw < 0) + return raw; + *val = (raw >> 8) & 0xFFFF; + return 0; + } + break; + + case hwmon_pwm: + if (attr == hwmon_pwm_input) { + raw = system76_get_index(data, "GFAN", channel); + if (raw < 0) + return raw; + *val = raw & 0xFF; + return 0; + } + break; + + case hwmon_temp: + if (attr == hwmon_temp_input) { + raw = system76_get_index(data, "GTMP", channel); + if (raw < 0) + return raw; + *val = raw * 1000; + return 0; + } + break; + + default: + return -EOPNOTSUPP; + } + + return -EOPNOTSUPP; +} + +static int thermal_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr, + int channel, const char **str) +{ + struct system76_data *data = dev_get_drvdata(dev); + + switch (type) { + case hwmon_fan: + if (attr == hwmon_fan_label) { + *str = system76_name(data->nfan, channel); + if (*str) + return 0; + } + break; + + case hwmon_temp: + if (attr == hwmon_temp_label) { + *str = system76_name(data->ntmp, channel); + if (*str) + return 0; + } + break; + + default: + return -EOPNOTSUPP; + } + + return -EOPNOTSUPP; +} + +static const struct hwmon_ops thermal_ops = { + .is_visible = thermal_is_visible, + .read = thermal_read, + .read_string = thermal_read_string, +}; + +// Allocate up to 8 fans and temperatures +static const struct hwmon_channel_info *thermal_channel_info[] = { + HWMON_CHANNEL_INFO(fan, + HWMON_F_INPUT | HWMON_F_LABEL, + HWMON_F_INPUT | HWMON_F_LABEL, + HWMON_F_INPUT | HWMON_F_LABEL, + HWMON_F_INPUT | HWMON_F_LABEL, + HWMON_F_INPUT | HWMON_F_LABEL, + HWMON_F_INPUT | HWMON_F_LABEL, + HWMON_F_INPUT | HWMON_F_LABEL, + HWMON_F_INPUT | HWMON_F_LABEL), + HWMON_CHANNEL_INFO(pwm, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT, + HWMON_PWM_INPUT), + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL, + HWMON_T_INPUT | HWMON_T_LABEL), + NULL +}; + +static const struct hwmon_chip_info thermal_chip_info = { + .ops = &thermal_ops, + .info = thermal_channel_info, +}; + +static void input_key(struct system76_data *data, unsigned int code) +{ + input_report_key(data->input, code, 1); + input_sync(data->input); + + input_report_key(data->input, code, 0); + input_sync(data->input); +} + // Handle ACPI notification static void system76_notify(struct acpi_device *acpi_dev, u32 event) { @@ -292,6 +655,9 @@ static void system76_notify(struct acpi_device *acpi_dev, u32 event) case 0x84: kb_led_hotkey_color(data); break; + case 0x85: + input_key(data, KEY_SCREENLOCK); + break; } } @@ -326,6 +692,7 @@ static int system76_add(struct acpi_device *acpi_dev) data->kb_led.brightness_set_blocking = kb_led_set; if (acpi_has_method(acpi_device_handle(data->acpi_dev), "SKBC")) { data->kb_led.max_brightness = 255; + data->kb_led.groups = system76_kb_led_color_groups; data->kb_toggle_brightness = 72; data->kb_color = 0xffffff; system76_set(data, "SKBC", data->kb_color); @@ -337,16 +704,42 @@ static int system76_add(struct acpi_device *acpi_dev) if (err) return err; - if (data->kb_color >= 0) { - err = device_create_file( - data->kb_led.dev, - &kb_led_color_dev_attr - ); - if (err) - return err; - } + data->input = devm_input_allocate_device(&acpi_dev->dev); + if (!data->input) + return -ENOMEM; + + data->input->name = "System76 ACPI Hotkeys"; + data->input->phys = "system76_acpi/input0"; + data->input->id.bustype = BUS_HOST; + data->input->dev.parent = &acpi_dev->dev; + input_set_capability(data->input, EV_KEY, KEY_SCREENLOCK); + + err = input_register_device(data->input); + if (err) + goto error; + + err = system76_get_object(data, "NFAN", &data->nfan); + if (err) + goto error; + + err = system76_get_object(data, "NTMP", &data->ntmp); + if (err) + goto error; + + data->therm = devm_hwmon_device_register_with_info(&acpi_dev->dev, + "system76_acpi", data, &thermal_chip_info, NULL); + err = PTR_ERR_OR_ZERO(data->therm); + if (err) + goto error; + + system76_battery_init(); return 0; + +error: + kfree(data->ntmp); + kfree(data->nfan); + return err; } // Remove a System76 ACPI device @@ -355,13 +748,15 @@ static int system76_remove(struct acpi_device *acpi_dev) struct system76_data *data; data = acpi_driver_data(acpi_dev); - if (data->kb_color >= 0) - device_remove_file(data->kb_led.dev, &kb_led_color_dev_attr); - devm_led_classdev_unregister(&acpi_dev->dev, &data->ap_led); + system76_battery_exit(); + devm_led_classdev_unregister(&acpi_dev->dev, &data->ap_led); devm_led_classdev_unregister(&acpi_dev->dev, &data->kb_led); + kfree(data->nfan); + kfree(data->ntmp); + system76_get(data, "FINI"); return 0; |