Add support for controlling MUTE, MICMUTE and FNLOCK LEDs.
In ordner to enable MUTE and MICMUTE LED control over thinkpad_helper
the external interface hid_lenovo_led_set is introduced.
This enables setting Lenovo LEDs from external.
This is needed because the X1 Tablet Cover is the first
thinkpad_helper controlable device which is connected via USB.
Additionally the led state is stored inside the hid-lenovo driver to
make the driver able to set the led appropriate after device attach.
---
drivers/hid/hid-lenovo.c | 262 +++++++++++++++++++++++++++++++++++++++++++++
include/linux/hid-lenovo.h | 15 +++
2 files changed, 277 insertions(+)
create mode 100644 include/linux/hid-lenovo.h
diff --git a/drivers/hid/hid-lenovo.c b/drivers/hid/hid-lenovo.c
index 4fc332c..2efd5b0 100644
--- a/drivers/hid/hid-lenovo.c
+++ b/drivers/hid/hid-lenovo.c
@@ -21,11 +21,27 @@
#include <linux/sysfs.h>
#include <linux/device.h>
#include <linux/hid.h>
+#include <linux/hid-lenovo.h>
#include <linux/input.h>
#include <linux/leds.h>
#include "hid-ids.h"
+struct lenovo_led_list_entry {
+ struct led_classdev *dev;
+ enum hid_lenovo_led_type type;
+ struct list_head list;
+};
+
+struct lenovo_led_type_entry {
+ struct led_classdev *dev;
+ enum hid_lenovo_led_type type;
+ struct list_head list;
+};
+
+static struct list_head hid_lenovo_leds = LIST_HEAD_INIT(hid_lenovo_leds);
+static enum led_brightness hid_lenovo_initial_leds[HID_LENOVO_LED_MAX];
+
struct lenovo_drvdata_tpkbd {
int led_state;
struct led_classdev led_mute;
@@ -44,6 +60,44 @@ struct lenovo_drvdata_cptkbd {
int sensitivity;
};
+struct lenovo_drvdata_tpx1cover {
+ uint16_t led_state;
+ uint8_t fnlock_state;
+ uint8_t led_present;
+ struct led_classdev led_mute;
+ struct led_classdev led_micmute;
+ struct led_classdev led_fnlock;
+};
+
+int hid_lenovo_led_set(enum hid_lenovo_led_type led, bool on)
+{
+ struct led_classdev *dev = NULL;
+ struct lenovo_led_list_entry *entry;
+
+ if (led >= HID_LENOVO_LED_MAX)
+ return -EINVAL;
+
+ hid_lenovo_initial_leds[led] = on ? LED_FULL : LED_OFF;
+
+ list_for_each_entry(entry, &hid_lenovo_leds, list) {
+ if (entry->type == led) {
+ dev = entry->dev;
+ break;
+ }
+ }
+
+ if (!dev)
+ return -ENODEV;
+
+ if (!dev->brightness_set)
+ return -ENODEV;
+
+ dev->brightness_set(dev, on ? LED_FULL : LED_OFF);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(hid_lenovo_led_set);
+
#define map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
static const __u8 lenovo_pro_dock_need_fixup_collection[] = {
@@ -416,6 +470,62 @@ static int lenovo_event_cptkbd(struct hid_device *hdev,
return 0;
}
+static enum led_brightness lenovo_led_brightness_get_tpx1cover(
+ struct led_classdev *led_cdev)
+{
+ struct device *dev = led_cdev->dev->parent;
+ struct hid_device *hdev = to_hid_device(dev);
+ struct lenovo_drvdata_tpx1cover *drv_data = hid_get_drvdata(hdev);
+ enum hid_lenovo_led_type led;
+
+ if (led_cdev == &drv_data->led_mute)
+ led = HID_LENOVO_LED_MUTE;
+ else if (led_cdev == &drv_data->led_micmute)
+ led = HID_LENOVO_LED_MICMUTE;
+ else if (led_cdev == &drv_data->led_fnlock)
+ led = HID_LENOVO_LED_FNLOCK;
+ else
+ return LED_OFF;
+
+ return drv_data->led_state & (1 << led)
+ ? LED_FULL
+ : LED_OFF;
+}
+
+static void lenovo_led_brightness_set_tpx1cover(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct device *dev = led_cdev->dev->parent;
+ struct hid_device *hdev = to_hid_device(dev);
+ struct lenovo_drvdata_tpx1cover *drv_data = hid_get_drvdata(hdev);
+ struct hid_report *report;
+ enum hid_lenovo_led_type led;
+
+ if (led_cdev == &drv_data->led_mute) {
+ led = HID_LENOVO_LED_MUTE;
+ } else if (led_cdev == &drv_data->led_micmute) {
+ led = HID_LENOVO_LED_MICMUTE;
+ } else if (led_cdev == &drv_data->led_fnlock) {
+ led = HID_LENOVO_LED_FNLOCK;
+ } else {
+ hid_warn(hdev, "Invalid LED to set.\n");
+ return;
+ }
+
+ if (value == LED_OFF)
+ drv_data->led_state &= ~(1 << led);
+ else
+ drv_data->led_state |= 1 << led;
+
+ report = hdev->report_enum[HID_OUTPUT_REPORT].report_id_hash[9];
+ if (report) {
+ report->field[0]->value[0] = ((led + 1) << 4) | 0x44;
+ report->field[0]->value[1] = (drv_data->led_state & (1 << led))
+ ? 0x02 : 0x01;
+ hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
+ }
+}
+
static int lenovo_event(struct hid_device *hdev, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
@@ -788,6 +898,7 @@ static int lenovo_probe_tpkbd(struct hid_device *hdev)
static int lenovo_probe_tpx1cover_configure(struct hid_device *hdev)
{
struct hid_report *report =
hdev->report_enum[HID_OUTPUT_REPORT].report_id_hash[9];
+ struct lenovo_drvdata_tpx1cover *drv_data = hid_get_drvdata(hdev);
if (!report)
return -ENOENT;
@@ -807,14 +918,33 @@ static int lenovo_probe_tpx1cover_configure(struct
hid_device *hdev)
hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
hid_hw_wait(hdev);
+ lenovo_led_brightness_set_tpx1cover(&drv_data->led_mute,
+ hid_lenovo_initial_leds[HID_LENOVO_LED_MUTE]);
+
+ hid_hw_wait(hdev);
+
+ lenovo_led_brightness_set_tpx1cover(&drv_data->led_micmute,
+ hid_lenovo_initial_leds[HID_LENOVO_LED_MICMUTE]);
+ hid_hw_wait(hdev);
+
+ lenovo_led_brightness_set_tpx1cover(&drv_data->led_fnlock, LED_FULL);
+
return 0;
}
static int lenovo_probe_tpx1cover_special_functions(struct hid_device *hdev)
{
+ struct device *dev = &hdev->dev;
+ struct lenovo_drvdata_tpx1cover *drv_data = NULL;
+ struct lenovo_led_list_entry *mute_entry = NULL;
+ struct lenovo_led_list_entry *micmute_entry = NULL;
+ struct lenovo_led_list_entry *fnlock_entry = NULL;
+
struct hid_report *report;
bool report_match = 1;
+ int ret = 0;
+
/* Used for LED control */
report = hid_validate_values(hdev, HID_INPUT_REPORT, 3, 0, 16);
report_match &= report ? 1 : 0;
@@ -825,7 +955,97 @@ static int lenovo_probe_tpx1cover_special_functions(struct
hid_device *hdev)
if (!report_match)
return -ENODEV;
+ drv_data = devm_kzalloc(&hdev->dev,
+ sizeof(struct lenovo_drvdata_tpx1cover),
+ GFP_KERNEL);
+
+ if (!drv_data) {
+ hid_err(hdev,
+ "Could not allocate memory for tpx1cover driver
data\n");
+ return -ENOMEM;
+ }
+
+ mute_entry = kzalloc(sizeof(*mute_entry), GFP_KERNEL);
+ if (!mute_entry) {
+ hid_err(hdev, "Could not allocate memory for led mute entry\n");
+ ret = -ENOMEM;
+ goto err_cleanup;
+ }
+ drv_data->led_mute.name = "MUTE_LED";
+ drv_data->led_mute.brightness_get = lenovo_led_brightness_get_tpx1cover;
+ drv_data->led_mute.brightness_set = lenovo_led_brightness_set_tpx1cover;
+ devm_led_classdev_register(dev, &drv_data->led_mute);
+
+ INIT_LIST_HEAD(&mute_entry->list);
+ mute_entry->dev = &drv_data->led_mute;
+ mute_entry->type = HID_LENOVO_LED_MUTE;
+ list_add_tail(&mute_entry->list, &hid_lenovo_leds);
+
+
+ micmute_entry = kzalloc(sizeof(*micmute_entry), GFP_KERNEL);
+ if (!micmute_entry) {
+ hid_err(hdev, "Could not allocate memory for led micmute
entry\n");
+ ret = -ENOMEM;
+ goto err_cleanup;
+ }
+
+ drv_data->led_micmute.name = "MICMUTE_LED";
+ drv_data->led_micmute.brightness_get =
lenovo_led_brightness_get_tpx1cover;
+ drv_data->led_micmute.brightness_set =
lenovo_led_brightness_set_tpx1cover;
+ devm_led_classdev_register(dev, &drv_data->led_micmute);
+
+ INIT_LIST_HEAD(&micmute_entry->list);
+ micmute_entry->dev = &drv_data->led_micmute;
+ micmute_entry->type = HID_LENOVO_LED_MICMUTE;
+ list_add_tail(&micmute_entry->list, &hid_lenovo_leds);
+
+
+ fnlock_entry = kzalloc(sizeof(*fnlock_entry), GFP_KERNEL);
+ if (!fnlock_entry) {
+ hid_err(hdev, "Could not allocate memory for led fnlock
entry\n");
+ ret = -ENOMEM;
+ goto err_cleanup;
+ }
+
+ drv_data->led_fnlock.brightness_get =
lenovo_led_brightness_get_tpx1cover;
+ drv_data->led_fnlock.brightness_set =
lenovo_led_brightness_set_tpx1cover;
+ drv_data->led_fnlock.name = "FNLOCK_LED";
+ devm_led_classdev_register(dev, &drv_data->led_fnlock);
+
+ INIT_LIST_HEAD(&fnlock_entry->list);
+ fnlock_entry->dev = &drv_data->led_fnlock;
+ fnlock_entry->type = HID_LENOVO_LED_FNLOCK;
+ list_add_tail(&fnlock_entry->list, &hid_lenovo_leds);
+
+
+ drv_data->led_state = 0;
+ drv_data->fnlock_state = 1;
+ drv_data->led_present = 1;
+
+ hid_set_drvdata(hdev, drv_data);
+
return lenovo_probe_tpx1cover_configure(hdev);
+
+err_cleanup:
+ if (mute_entry) {
+ list_del(&mute_entry->list);
+ kfree (mute_entry);
+ }
+
+ if (micmute_entry) {
+ list_del(&micmute_entry->list);
+ kfree (micmute_entry);
+ }
+
+ if (fnlock_entry) {
+ list_del(&fnlock_entry->list);
+ kfree (fnlock_entry);
+ }
+
+ if (drv_data)
+ kfree(drv_data);
+
+ return ret;
}
static int lenovo_probe_tpx1cover_touch(struct hid_device *hdev)
@@ -846,6 +1066,7 @@ static int lenovo_probe_tpx1cover_touch(struct hid_device
*hdev)
static int lenovo_probe_tpx1cover_keyboard(struct hid_device *hdev)
{
+ struct lenovo_drvdata_tpx1cover *drv_data;
struct hid_report *report;
bool report_match = 1;
int ret = 0;
@@ -860,6 +1081,21 @@ static int lenovo_probe_tpx1cover_keyboard(struct
hid_device *hdev)
if (!report_match)
ret = -ENODEV;
+ drv_data = devm_kzalloc(&hdev->dev,
+ sizeof(struct lenovo_drvdata_tpx1cover),
+ GFP_KERNEL);
+
+ if (!drv_data) {
+ hid_err(hdev,
+ "Could not allocate memory for tpx1cover driver
data\n");
+ return -ENOMEM;
+ }
+
+ drv_data->led_state = 0;
+ drv_data->led_present = 0;
+ drv_data->fnlock_state = 0;
+ hid_set_drvdata(hdev, drv_data);
+
return ret;
}
@@ -1001,6 +1237,29 @@ static void lenovo_remove_cptkbd(struct hid_device *hdev)
&lenovo_attr_group_cptkbd);
}
+static void lenovo_remove_tpx1cover(struct hid_device *hdev)
+{
+ struct lenovo_drvdata_tpx1cover *drv_data = hid_get_drvdata(hdev);
+ struct lenovo_led_list_entry *entry, *head;
+
+ if (!drv_data)
+ return;
+
+ if (drv_data->led_present) {
+ list_for_each_entry_safe(entry, head, &hid_lenovo_leds, list) {
+ if (entry->dev == &drv_data->led_fnlock
+ || entry->dev == &drv_data->led_micmute
+ || entry->dev == &drv_data->led_mute) {
+
+ list_del(&entry->list);
+ kfree(entry);
+ }
+ }
+ }
+
+ hid_set_drvdata(hdev, NULL);
+}
+
static void lenovo_remove(struct hid_device *hdev)
{
switch (hdev->product) {
@@ -1011,6 +1270,9 @@ static void lenovo_remove(struct hid_device *hdev)
case USB_DEVICE_ID_LENOVO_CBTKBD:
lenovo_remove_cptkbd(hdev);
break;
+ case USB_DEVICE_ID_LENOVO_X1_COVER:
+ lenovo_remove_tpx1cover(hdev);
+ break;
}
hid_hw_stop(hdev);
diff --git a/include/linux/hid-lenovo.h b/include/linux/hid-lenovo.h
new file mode 100644
index 0000000..00eb140
--- /dev/null
+++ b/include/linux/hid-lenovo.h
@@ -0,0 +1,15 @@
+
+#ifndef __HID_LENOVO_H__
+#define __HID_LENOVO_H__
+
+
+enum hid_lenovo_led_type {
+ HID_LENOVO_LED_FNLOCK = 0,
+ HID_LENOVO_LED_MUTE,
+ HID_LENOVO_LED_MICMUTE,
+ HID_LENOVO_LED_MAX
+};
+
+int hid_lenovo_led_set(enum hid_lenovo_led_type led, bool on);
+
+#endif /* __HID_LENOVO_H_ */
--
1.9.1
--
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