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List:       linux-input
Subject:    [PATCH v1 3/5] HID: add on_transport_error() field to struct hid_driver
From:       Dmitry Antipov <daantipov () gmail ! com>
Date:       2021-12-29 23:11:39
Message-ID: 20211229231141.303919-4-dmanti () microsoft ! com
[Download RAW message or body]

This new API allows a transport driver to notify the HID device driver
about a transport layer error.

Signed-off-by: Dmitry Antipov <dmanti@microsoft.com>
---
 include/linux/hid.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/include/linux/hid.h b/include/linux/hid.h
index 1f134c8f8972..97041c322a0f 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -703,6 +703,20 @@ struct hid_usage_id {
 	__u32 usage_code;
 };
 
+enum hid_transport_error_type {
+	HID_TRANSPORT_ERROR_TYPE_BUS_INPUT_TRANSFER_START = 0,
+	HID_TRANSPORT_ERROR_TYPE_BUS_INPUT_TRANSFER_BODY,
+	HID_TRANSPORT_ERROR_TYPE_BUS_INPUT_TRANSFER_HEADER,
+	HID_TRANSPORT_ERROR_TYPE_BUS_OUTPUT_TRANSFER,
+	HID_TRANSPORT_ERROR_TYPE_DEVICE_INITIATED_RESET,
+	HID_TRANSPORT_ERROR_TYPE_HEADER_DATA,
+	HID_TRANSPORT_ERROR_TYPE_INPUT_REPORT_DATA,
+	HID_TRANSPORT_ERROR_TYPE_REPORT_TYPE,
+	HID_TRANSPORT_ERROR_TYPE_GET_FEATURE_RESPONSE,
+	HID_TRANSPORT_ERROR_TYPE_REGULATOR_ENABLE,
+	HID_TRANSPORT_ERROR_TYPE_REGULATOR_DISABLE
+};
+
 /**
  * struct hid_driver
  * @name: driver name (e.g. "Footech_bar-wheel")
@@ -726,6 +740,7 @@ struct hid_usage_id {
  * @suspend: invoked on suspend (NULL means nop)
  * @resume: invoked on resume if device was not reset (NULL means nop)
  * @reset_resume: invoked on resume if device was reset (NULL means nop)
+ * @on_transport_error: invoked on error hit by transport driver
  *
  * probe should return -errno on error, or 0 on success. During probe,
  * input will not be passed to raw_event unless hid_device_io_start is
@@ -777,6 +792,10 @@ struct hid_driver {
 	void (*feature_mapping)(struct hid_device *hdev,
 			struct hid_field *field,
 			struct hid_usage *usage);
+	void (*on_transport_error)(struct hid_device *hdev,
+			int err_type,
+			int err_code,
+			bool handled);
 #ifdef CONFIG_PM
 	int (*suspend)(struct hid_device *hdev, pm_message_t message);
 	int (*resume)(struct hid_device *hdev);
-- 
2.25.1

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