From: Roderick Colenbrander <roderick.colenbrander@xxxxxxxx>
Expose the DualSense its RGB lightbar using the new multicolor LED
framework.
Signed-off-by: Roderick Colenbrander <roderick.colenbrander@xxxxxxxx>
---
drivers/hid/Kconfig | 1 +
drivers/hid/hid-playstation.c | 115 ++++++++++++++++++++++++++++++++++
2 files changed, 116 insertions(+)
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 54b4eee222f9..cfa29dc17064 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -857,6 +857,7 @@ config HID_PLAYSTATION
tristate "PlayStation HID Driver"
depends on HID
select CRC32
+ select LEDS_CLASS_MULTICOLOR
select POWER_SUPPLY
help
Provides support for Sony PS5 controllers including support for
diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c
index bb49e2ef9017..58fdec0d32d4 100644
--- a/drivers/hid/hid-playstation.c
+++ b/drivers/hid/hid-playstation.c
@@ -10,6 +10,7 @@
#include <linux/device.h>
#include <linux/hid.h>
#include <linux/input/mt.h>
+#include <linux/led-class-multicolor.h>
#include <linux/module.h>
#include <asm/unaligned.h>
@@ -99,6 +100,10 @@ struct ps_calibration_data {
/* Flags for DualSense output report. */
#define DS_OUTPUT_VALID_FLAG0_COMPATIBLE_VIBRATION BIT(0)
#define DS_OUTPUT_VALID_FLAG0_HAPTICS_SELECT BIT(1)
+#define DS_OUTPUT_VALID_FLAG1_LIGHTBAR_CONTROL_ENABLE BIT(2)
+#define DS_OUTPUT_VALID_FLAG1_RELEASE_LEDS BIT(3)
+#define DS_OUTPUT_VALID_FLAG2_LIGHTBAR_SETUP_CONTROL_ENABLE BIT(1)
+#define DS_OUTPUT_LIGHTBAR_SETUP_LIGHT_OUT BIT(1)
/* DualSense hardware limits */
#define DS_ACC_RES_PER_G 8192
@@ -128,6 +133,13 @@ struct dualsense {
uint8_t motor_left;
uint8_t motor_right;
+ /* RGB lightbar */
+ struct led_classdev_mc lightbar;
+ bool update_lightbar;
+ uint8_t lightbar_red;
+ uint8_t lightbar_green;
+ uint8_t lightbar_blue;
+
struct work_struct output_worker;
void *output_report_dmabuf;
uint8_t output_seq; /* Sequence number for output report. */
@@ -464,6 +476,42 @@ static int ps_get_report(struct hid_device *hdev, uint8_t report_id, uint8_t *bu
return 0;
}
+/* Register a DualSense/DualShock4 RGB lightbar represented by a multicolor LED. */
+static int ps_lightbar_register(struct ps_device *ps_dev, struct led_classdev_mc *lightbar_mc_dev,
+ int (*brightness_set)(struct led_classdev *, enum led_brightness))
+{
+ struct hid_device *hdev = ps_dev->hdev;
+ struct mc_subled *mc_led_info;
+ struct led_classdev *led_cdev;
+ int ret;
+
+ mc_led_info = devm_kmalloc_array(&hdev->dev, 3, sizeof(*mc_led_info), GFP_KERNEL | __GFP_ZERO);
+ if (!mc_led_info)
+ return -ENOMEM;
+
+ mc_led_info[0].color_index = LED_COLOR_ID_RED;
+ mc_led_info[1].color_index = LED_COLOR_ID_GREEN;
+ mc_led_info[2].color_index = LED_COLOR_ID_BLUE;
+
+ lightbar_mc_dev->subled_info = mc_led_info;
+ lightbar_mc_dev->num_colors = 3;
+
+ led_cdev = &lightbar_mc_dev->led_cdev;
+ led_cdev->name = devm_kasprintf(&hdev->dev, GFP_KERNEL, "playstation::%pMR::rgb",
+ ps_dev->mac_address);
+ led_cdev->brightness = 255;
+ led_cdev->max_brightness = 255;
+ led_cdev->brightness_set_blocking = brightness_set;
+
+ ret = devm_led_classdev_multicolor_register(&hdev->dev, lightbar_mc_dev);
+ if (ret < 0) {
+ hid_err(hdev, "Cannot register multicolor LED device\n");
+ return ret;
+ }
+
+ return 0;
+}
+
static struct input_dev *ps_sensors_create(struct hid_device *hdev, int accel_range, int accel_res,
int gyro_range, int gyro_res)
{
@@ -642,6 +690,26 @@ static int dualsense_get_mac_address(struct dualsense *ds)
return ret;
}
+static int dualsense_lightbar_set_brightness(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct led_classdev_mc *mc_cdev = lcdev_to_mccdev(cdev);
+ struct dualsense *ds = container_of(mc_cdev, struct dualsense, lightbar);
+ unsigned long flags;
+
+ led_mc_calc_color_components(mc_cdev, brightness);
+
+ spin_lock_irqsave(&ds->base.lock, flags);
+ ds->update_lightbar = true;
+ ds->lightbar_red = mc_cdev->subled_info[0].brightness;
+ ds->lightbar_green = mc_cdev->subled_info[1].brightness;
+ ds->lightbar_blue = mc_cdev->subled_info[2].brightness;
+ spin_unlock_irqrestore(&ds->base.lock, flags);
+
+ schedule_work(&ds->output_worker);
+ return 0;
+}
+
static void dualsense_init_output_report(struct dualsense *ds, struct dualsense_output_report *rp,
void *buf)
{
@@ -725,6 +793,15 @@ static void dualsense_output_worker(struct work_struct *work)
ds->update_rumble = false;
}
+ if (ds->update_lightbar) {
+ common->valid_flag1 |= DS_OUTPUT_VALID_FLAG1_LIGHTBAR_CONTROL_ENABLE;
+ common->lightbar_red = ds->lightbar_red;
+ common->lightbar_green = ds->lightbar_green;
+ common->lightbar_blue = ds->lightbar_blue;
+
+ ds->update_lightbar = false;
+ }
+
spin_unlock_irqrestore(&ds->base.lock, flags);
dualsense_send_output_report(ds, &report);
@@ -909,6 +986,31 @@ static int dualsense_play_effect(struct input_dev *dev, void *data, struct ff_ef
return 0;
}
+static int dualsense_reset_leds(struct dualsense *ds)
+{
+ struct dualsense_output_report report;
+ uint8_t *buf;
+
+ buf = kzalloc(sizeof(struct dualsense_output_report_bt), GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ dualsense_init_output_report(ds, &report, buf);
+ /*
+ * On Bluetooth the DualSense outputs an animation on the lightbar
+ * during startup and maintains a color afterwards. We need to explicitly
+ * reconfigure the lightbar before we can do any programming later on.
+ * In USB the lightbar is not on by default, but redoing the setup there
+ * doesn't hurt.
+ */
+ report.common->valid_flag2 = DS_OUTPUT_VALID_FLAG2_LIGHTBAR_SETUP_CONTROL_ENABLE;
+ report.common->lightbar_setup = DS_OUTPUT_LIGHTBAR_SETUP_LIGHT_OUT; /* Fade light out. */
+ dualsense_send_output_report(ds, &report);
+
+ kfree(buf);
+ return 0;
+}
+
static struct ps_device *dualsense_create(struct hid_device *hdev)
{
struct dualsense *ds;
@@ -980,6 +1082,19 @@ static struct ps_device *dualsense_create(struct hid_device *hdev)
if (ret)
goto err;
+ /*
+ * The hardware may have control over the LEDs (e.g. in Bluetooth on startup).
+ * Reset the LEDs (lightbar, mute, player leds), so we can control them
+ * from software.
+ */
+ ret = dualsense_reset_leds(ds);
+ if (ret)
+ goto err;
+
+ ret = ps_lightbar_register(ps_dev, &ds->lightbar, dualsense_lightbar_set_brightness);
+ if (ret)
+ goto err;
+
return &ds->base;
err:
--
2.26.2
