Merge branches 'for-4.13/multitouch', 'for-4.13/retrode', 'for-4.13/transport-open...

[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / drivers / hid / hid-core.c

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 49b9b4e8bfb4b42c580e67cd16759a3c145670b7..539d1dd888deda938f59dc76a26e8e2ad988e323 100644 (file)
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1070,7 +1070,7 @@ static s32 snto32(__u32 value, unsigned n)
        case 16: return ((__s16)value);
        case 32: return ((__s32)value);
        }
-       return value & (1 << (n - 1)) ? value | (-1 << n) : value;
+       return value & (1 << (n - 1)) ? value | (~0U << n) : value;
 }
 
 s32 hid_snto32(__u32 value, unsigned n)
@@ -1774,6 +1774,94 @@ void hid_disconnect(struct hid_device *hdev)
 }
 EXPORT_SYMBOL_GPL(hid_disconnect);
 
+/**
+ * hid_hw_start - start underlying HW
+ * @hdev: hid device
+ * @connect_mask: which outputs to connect, see HID_CONNECT_*
+ *
+ * Call this in probe function *after* hid_parse. This will setup HW
+ * buffers and start the device (if not defeirred to device open).
+ * hid_hw_stop must be called if this was successful.
+ */
+int hid_hw_start(struct hid_device *hdev, unsigned int connect_mask)
+{
+       int error;
+
+       error = hdev->ll_driver->start(hdev);
+       if (error)
+               return error;
+
+       if (connect_mask) {
+               error = hid_connect(hdev, connect_mask);
+               if (error) {
+                       hdev->ll_driver->stop(hdev);
+                       return error;
+               }
+       }
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(hid_hw_start);
+
+/**
+ * hid_hw_stop - stop underlying HW
+ * @hdev: hid device
+ *
+ * This is usually called from remove function or from probe when something
+ * failed and hid_hw_start was called already.
+ */
+void hid_hw_stop(struct hid_device *hdev)
+{
+       hid_disconnect(hdev);
+       hdev->ll_driver->stop(hdev);
+}
+EXPORT_SYMBOL_GPL(hid_hw_stop);
+
+/**
+ * hid_hw_open - signal underlying HW to start delivering events
+ * @hdev: hid device
+ *
+ * Tell underlying HW to start delivering events from the device.
+ * This function should be called sometime after successful call
+ * to hid_hiw_start().
+ */
+int hid_hw_open(struct hid_device *hdev)
+{
+       int ret;
+
+       ret = mutex_lock_killable(&hdev->ll_open_lock);
+       if (ret)
+               return ret;
+
+       if (!hdev->ll_open_count++) {
+               ret = hdev->ll_driver->open(hdev);
+               if (ret)
+                       hdev->ll_open_count--;
+       }
+
+       mutex_unlock(&hdev->ll_open_lock);
+       return ret;
+}
+EXPORT_SYMBOL_GPL(hid_hw_open);
+
+/**
+ * hid_hw_close - signal underlaying HW to stop delivering events
+ *
+ * @hdev: hid device
+ *
+ * This function indicates that we are not interested in the events
+ * from this device anymore. Delivery of events may or may not stop,
+ * depending on the number of users still outstanding.
+ */
+void hid_hw_close(struct hid_device *hdev)
+{
+       mutex_lock(&hdev->ll_open_lock);
+       if (!--hdev->ll_open_count)
+               hdev->ll_driver->close(hdev);
+       mutex_unlock(&hdev->ll_open_lock);
+}
+EXPORT_SYMBOL_GPL(hid_hw_close);
+
 /*
  * A list of devices for which there is a specialized driver on HID bus.
  *
@@ -1892,6 +1980,8 @@ static const struct hid_device_id hid_have_special_driver[] = {
        { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD1) },
        { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_ROG_KEYBOARD2) },
        { HID_USB_DEVICE(USB_VENDOR_ID_ASUSTEK, USB_DEVICE_ID_ASUSTEK_T100_KEYBOARD) },
+       { HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_ASUS_MD_5112) },
+       { HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_ASUS_MD_5110) },
 #endif
 #if IS_ENABLED(CONFIG_HID_AUREAL)
        { HID_USB_DEVICE(USB_VENDOR_ID_AUREAL, USB_DEVICE_ID_AUREAL_W01RN) },
@@ -1913,9 +2003,8 @@ static const struct hid_device_id hid_have_special_driver[] = {
 #if IS_ENABLED(CONFIG_HID_CHICONY)
        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
-       { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_AK1D) },
+       { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_ASUS_AK1D) },
        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
-       { HID_USB_DEVICE(USB_VENDOR_ID_JESS, USB_DEVICE_ID_JESS_ZEN_AIO_KBD) },
 #endif
 #if IS_ENABLED(CONFIG_HID_CMEDIA)
        { HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM6533) },
@@ -1984,6 +2073,9 @@ static const struct hid_device_id hid_have_special_driver[] = {
 #if IS_ENABLED(CONFIG_HID_ICADE)
        { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_ION, USB_DEVICE_ID_ICADE) },
 #endif
+#if IS_ENABLED(CONFIG_HID_ITE)
+       { HID_USB_DEVICE(USB_VENDOR_ID_ITE, USB_DEVICE_ID_ITE8595) },
+#endif
 #if IS_ENABLED(CONFIG_HID_KENSINGTON)
        { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
 #endif
@@ -2910,6 +3002,7 @@ struct hid_device *hid_allocate_device(void)
        spin_lock_init(&hdev->debug_list_lock);
        sema_init(&hdev->driver_lock, 1);
        sema_init(&hdev->driver_input_lock, 1);
+       mutex_init(&hdev->ll_open_lock);
 
        return hdev;
 }