From: Roderick Colenbrander <roderick.colenbrander@xxxxxxxx>
Add a ID allocator to assign player ids to ps_device instances.
Utilize the player id to set a default color on the DualSense its
player LED strip.
Signed-off-by: Roderick Colenbrander <roderick.colenbrander@xxxxxxxx>
---
drivers/hid/hid-playstation.c | 70 ++++++++++++++++++++++++++++++++++-
1 file changed, 69 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c
index 966d1a5aee18..8d827d78fa65 100644
--- a/drivers/hid/hid-playstation.c
+++ b/drivers/hid/hid-playstation.c
@@ -9,6 +9,7 @@
#include <linux/crc32.h>
#include <linux/device.h>
#include <linux/hid.h>
+#include <linux/idr.h>
#include <linux/input/mt.h>
#include <linux/leds.h>
#include <linux/led-class-multicolor.h>
@@ -22,6 +23,8 @@
static DEFINE_MUTEX(ps_devices_lock);
static LIST_HEAD(ps_devices_list);
+static DEFINE_IDA(ps_player_id_allocator);
+
#define HID_PLAYSTATION_VERSION_PATCH 0x8000
/* Base class for playstation devices. */
@@ -30,6 +33,8 @@ struct ps_device {
struct hid_device *hdev;
spinlock_t lock;
+ uint32_t player_id;
+
struct power_supply_desc battery_desc;
struct power_supply *battery;
uint8_t battery_capacity;
@@ -321,6 +326,24 @@ static int ps_devices_list_remove(struct ps_device *dev)
return 0;
}
+static int ps_device_set_player_id(struct ps_device *dev)
+{
+ int ret = ida_alloc(&ps_player_id_allocator, GFP_KERNEL);
+
+ if (ret < 0)
+ return ret;
+
+ dev->player_id = ret;
+ return 0;
+}
+
+static void ps_device_release_player_id(struct ps_device *dev)
+{
+ ida_free(&ps_player_id_allocator, dev->player_id);
+
+ dev->player_id = U32_MAX;
+}
+
static struct input_dev *ps_allocate_input_dev(struct hid_device *hdev, const char *name_suffix)
{
struct input_dev *input_dev;
@@ -1144,6 +1167,29 @@ static int dualsense_reset_leds(struct dualsense *ds)
return 0;
}
+static void dualsense_set_player_leds(struct dualsense *ds)
+{
+ /*
+ * The DualSense controller has a row of 5 LEDs used for player ids.
+ * Behavior on the PlayStation 5 console is to center the player id
+ * across the LEDs, so e.g. player 1 would be "--x--" with x being 'on'.
+ * Follow a similar mapping here.
+ */
+ int player_ids[5] = {
+ BIT(2),
+ BIT(3) | BIT(1),
+ BIT(4) | BIT(2) | BIT(0),
+ BIT(4) | BIT(3) | BIT(1) | BIT(0),
+ BIT(4) | BIT(3) | BIT(2) | BIT(1) | BIT(0)
+ };
+
+ uint8_t player_id = ds->base.player_id % ARRAY_SIZE(player_ids);
+
+ ds->update_player_leds = true;
+ ds->player_leds_state = player_ids[player_id];
+ schedule_work(&ds->output_worker);
+}
+
static struct ps_device *dualsense_create(struct hid_device *hdev)
{
struct dualsense *ds;
@@ -1252,6 +1298,15 @@ static struct ps_device *dualsense_create(struct hid_device *hdev)
goto err;
}
+ ret = ps_device_set_player_id(ps_dev);
+ if (ret) {
+ hid_err(hdev, "Failed to assign player id for DualSense: %d\n", ret);
+ goto err;
+ }
+
+ /* Set player LEDs to our player id. */
+ dualsense_set_player_leds(ds);
+
return &ds->base;
err:
@@ -1316,6 +1371,7 @@ static void ps_remove(struct hid_device *hdev)
struct ps_device *dev = hid_get_drvdata(hdev);
ps_devices_list_remove(dev);
+ ps_device_release_player_id(dev);
hid_hw_close(hdev);
hid_hw_stop(hdev);
@@ -1336,7 +1392,19 @@ static struct hid_driver ps_driver = {
.raw_event = ps_raw_event,
};
-module_hid_driver(ps_driver);
+static int __init ps_init(void)
+{
+ return hid_register_driver(&ps_driver);
+}
+
+static void __exit ps_exit(void)
+{
+ hid_unregister_driver(&ps_driver);
+ ida_destroy(&ps_player_id_allocator);
+}
+
+module_init(ps_init);
+module_exit(ps_exit);
MODULE_AUTHOR("Sony Interactive Entertainment");
MODULE_DESCRIPTION("HID Driver for PlayStation peripherals.");
--
2.26.2
