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author | Roderick Colenbrander <roderick@gaikai.com> | 2021-09-08 09:55:37 -0700 |
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committer | Jiri Kosina <jkosina@suse.cz> | 2021-10-27 09:49:29 +0200 |
commit | fc97b4d6a1a6d418fd4053fd7716eca746fdd163 (patch) | |
tree | eb5d096bee37982dfc88ae6721c04156278dc9be | |
parent | 42d43c92fc577dca59ed74aec7868abec8d6ca6e (diff) | |
download | linux-stable-fc97b4d6a1a6d418fd4053fd7716eca746fdd163.tar.gz linux-stable-fc97b4d6a1a6d418fd4053fd7716eca746fdd163.tar.bz2 linux-stable-fc97b4d6a1a6d418fd4053fd7716eca746fdd163.zip |
HID: playstation: expose DualSense lightbar through a multi-color LED.
The DualSense lightbar has so far been supported, but it was not yet
adjustable from user space. This patch exposes it through a multi-color
LED.
Signed-off-by: Roderick Colenbrander <roderick.colenbrander@sony.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
-rw-r--r-- | drivers/hid/hid-playstation.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c index ab7c82c2e886..ff2fc315a89d 100644 --- a/drivers/hid/hid-playstation.c +++ b/drivers/hid/hid-playstation.c @@ -11,6 +11,8 @@ #include <linux/hid.h> #include <linux/idr.h> #include <linux/input/mt.h> +#include <linux/leds.h> +#include <linux/led-class-multicolor.h> #include <linux/module.h> #include <asm/unaligned.h> @@ -38,6 +40,7 @@ struct ps_device { uint8_t battery_capacity; int battery_status; + const char *input_dev_name; /* Name of primary input device. */ uint8_t mac_address[6]; /* Note: stored in little endian order. */ uint32_t hw_version; uint32_t fw_version; @@ -147,6 +150,7 @@ struct dualsense { uint8_t motor_right; /* RGB lightbar */ + struct led_classdev_mc lightbar; bool update_lightbar; uint8_t lightbar_red; uint8_t lightbar_green; @@ -288,6 +292,8 @@ static const struct {int x; int y; } ps_gamepad_hat_mapping[] = { {0, 0}, }; +static void dualsense_set_lightbar(struct dualsense *ds, uint8_t red, uint8_t green, uint8_t blue); + /* * Add a new ps_device to ps_devices if it doesn't exist. * Return error on duplicate device, which can happen if the same @@ -525,6 +531,45 @@ 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, "%s:rgb:indicator", + ps_dev->input_dev_name); + if (!led_cdev->name) + return -ENOMEM; + 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) { @@ -761,6 +806,22 @@ err_free: 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); + uint8_t red, green, blue; + + led_mc_calc_color_components(mc_cdev, brightness); + red = mc_cdev->subled_info[0].brightness; + green = mc_cdev->subled_info[1].brightness; + blue = mc_cdev->subled_info[2].brightness; + + dualsense_set_lightbar(ds, red, green, blue); + return 0; +} + static void dualsense_init_output_report(struct dualsense *ds, struct dualsense_output_report *rp, void *buf) { @@ -1106,10 +1167,14 @@ static int dualsense_reset_leds(struct dualsense *ds) static void dualsense_set_lightbar(struct dualsense *ds, uint8_t red, uint8_t green, uint8_t blue) { + unsigned long flags; + + spin_lock_irqsave(&ds->base.lock, flags); ds->update_lightbar = true; ds->lightbar_red = red; ds->lightbar_green = green; ds->lightbar_blue = blue; + spin_unlock_irqrestore(&ds->base.lock, flags); schedule_work(&ds->output_worker); } @@ -1196,6 +1261,8 @@ static struct ps_device *dualsense_create(struct hid_device *hdev) ret = PTR_ERR(ds->gamepad); goto err; } + /* Use gamepad input device name as primary device name for e.g. LEDs */ + ps_dev->input_dev_name = dev_name(&ds->gamepad->dev); ds->sensors = ps_sensors_create(hdev, DS_ACC_RANGE, DS_ACC_RES_PER_G, DS_GYRO_RANGE, DS_GYRO_RES_PER_DEG_S); @@ -1223,6 +1290,11 @@ static struct ps_device *dualsense_create(struct hid_device *hdev) if (ret) goto err; + ret = ps_lightbar_register(ps_dev, &ds->lightbar, dualsense_lightbar_set_brightness); + if (ret) + goto err; + + /* Set default lightbar color. */ dualsense_set_lightbar(ds, 0, 0, 128); /* blue */ ret = ps_device_set_player_id(ps_dev); |