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HID: playstation: expose DualSense lightbar through a multi-color LED.

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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>
This commit is contained in:
Roderick Colenbrander 2021-09-08 09:55:37 -07:00 committed by Jiri Kosina
parent 42d43c92fc
commit fc97b4d6a1
1 changed files with 72 additions and 0 deletions
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72
drivers/hid/hid-playstation.c
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@ -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);