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HID: playstation: track devices in list.

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Track devices in a list, so we can detect when a device is connected
twice when using Bluetooth and USB.

Signed-off-by: Roderick Colenbrander <roderick.colenbrander@sony.com>
Reviewed-by: Barnabás Pőcze <pobrn@protonmail.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
This commit is contained in:
Roderick Colenbrander 2021-02-07 13:49:01 -08:00 committed by Benjamin Tissoires
parent 402987c5d9
commit 53f04e8357
1 changed files with 46 additions and 0 deletions
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46
drivers/hid/hid-playstation.c
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@ -15,10 +15,15 @@
#include "hid-ids.h"
/* List of connected playstation devices. */
static DEFINE_MUTEX(ps_devices_lock);
static LIST_HEAD(ps_devices_list);
#define HID_PLAYSTATION_VERSION_PATCH 0x8000
/* Base class for playstation devices. */
struct ps_device {
struct list_head list;
struct hid_device *hdev;
spinlock_t lock;
@ -160,6 +165,38 @@ static const struct {int x; int y; } ps_gamepad_hat_mapping[] = {
{0, 0},
};
/*
* Add a new ps_device to ps_devices if it doesn't exist.
* Return error on duplicate device, which can happen if the same
* device is connected using both Bluetooth and USB.
*/
static int ps_devices_list_add(struct ps_device *dev)
{
struct ps_device *entry;
mutex_lock(&ps_devices_lock);
list_for_each_entry(entry, &ps_devices_list, list) {
if (!memcmp(entry->mac_address, dev->mac_address, sizeof(dev->mac_address))) {
hid_err(dev->hdev, "Duplicate device found for MAC address %pMR.\n",
dev->mac_address);
mutex_unlock(&ps_devices_lock);
return -EEXIST;
}
}
list_add_tail(&dev->list, &ps_devices_list);
mutex_unlock(&ps_devices_lock);
return 0;
}
static int ps_devices_list_remove(struct ps_device *dev)
{
mutex_lock(&ps_devices_lock);
list_del(&dev->list);
mutex_unlock(&ps_devices_lock);
return 0;
}
static struct input_dev *ps_allocate_input_dev(struct hid_device *hdev, const char *name_suffix)
{
struct input_dev *input_dev;
@ -675,6 +712,10 @@ static struct ps_device *dualsense_create(struct hid_device *hdev)
}
snprintf(hdev->uniq, sizeof(hdev->uniq), "%pMR", ds->base.mac_address);
ret = ps_devices_list_add(ps_dev);
if (ret)
return ERR_PTR(ret);
ret = dualsense_get_calibration_data(ds);
if (ret) {
hid_err(hdev, "Failed to get calibration data from DualSense\n");
@ -707,6 +748,7 @@ static struct ps_device *dualsense_create(struct hid_device *hdev)
return &ds->base;
err:
ps_devices_list_remove(ps_dev);
return ERR_PTR(ret);
}
@ -764,6 +806,10 @@ err_stop:
static void ps_remove(struct hid_device *hdev)
{
struct ps_device *dev = hid_get_drvdata(hdev);
ps_devices_list_remove(dev);
hid_hw_close(hdev);
hid_hw_stop(hdev);
}