touch/common: create google touch interface.

Doc: go/gti_1p
Bug: 201610482
Signed-off-by: Super Liu <supercjliu@google.com>
Change-Id: I3a68d91c69c94095d0da9d3691fef79146e243f4

1 files changed, 103 insertions, 0 deletions

diff --git a/goog_touch_interface.h b/goog_touch_interface.h
new file mode 100644
index 0000000..4b05397
--- /dev/null
+++ b/goog_touch_interface.h
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Google Touch Interface for Pixel devices.
+ *
+ * Copyright 2022 Google LLC.
+ */
+
+#ifndef _GOOG_TOUCH_INTERFACE_
+#define _GOOG_TOUCH_INTERFACE_
+
+#include "heatmap.h"
+#include "touch_offload.h"
+#include "uapi/input/touch_offload.h"
+
+#define GOOG_LOG_NAME "GTI"
+#define GOOG_DBG(fmt, args...)    pr_debug("[%s] %s: " fmt, GOOG_LOG_NAME,\
+					__func__, ##args)
+#define GOOG_LOG(fmt, args...)    pr_info("[%s] %s: " fmt, GOOG_LOG_NAME,\
+					__func__, ##args)
+#define GOOG_ERR(fmt, args...)    pr_err("[%s] %s: " fmt, GOOG_LOG_NAME,\
+					__func__, ##args)
+#define MAX_COORDS 10
+
+#define KTIME_RELEASE_ALL (ktime_set(0, 0))
+
+/**
+ * struct goog_touch_interfac - Google touch interface data for Pixel.
+ * @vendor_private_data: the private data pointer that used by touch vendor driver.
+ * @dev: pointer to struct device that used by touch vendor driver.
+ * @input_dev: poiner to struct inpu_dev that used by touch vendor driver.
+ * @input_lock: protect the input report between non-offload and offload.
+ * @offload: struct that used by touch offload.
+ * @offload_frame: reserved frame that used by touch offload.
+ * @v4l2: struct that used by v4l2.
+ * @timestamp: irq timestamp from touch vendor driver.
+ * @force_legacy_report: force to directly report input by kernel input API.
+ * @offload_enable: touch offload is running.
+ * @v4l2_enable: v4l2 is running.
+ * @coord_changed: coords was changed and wait to push frame into touch offload.
+ * @offload_id: id that used by touch offload.
+ * @heatmap_buf: heatmap buffer that used by v4l2.
+ * @heatmap_buf_size: heatmap buffer size that used by v4l2.
+ * @slot: slot id that current used by input report.
+ * @get_channel_data_cb: touch vendor driver function callback to get channel data.
+ */
+
+struct goog_touch_interface {
+	void *vendor_private_data;
+	struct device *dev;
+	struct input_dev *input_dev;
+	struct mutex input_lock;
+	struct touch_offload_context offload;
+	struct touch_offload_frame *offload_frame;
+	struct v4l2_heatmap v4l2;
+	ktime_t timestamp;
+
+	bool force_legacy_report;
+	bool offload_enable;
+	bool v4l2_enable;
+	bool coord_changed;
+	union {
+	u8 offload_id_byte[4];
+	u32 offload_id;
+	};
+	u8 *heatmap_buf;
+	u32 heatmap_buf_size;
+	int slot;
+
+	int (*get_channel_data_cb)(void *vendor_private_data,
+				u32 data_type, u8 **ptr, u32 *size);
+};
+
+
+inline bool goog_input_legacy_report(struct goog_touch_interface *gti);
+inline void goog_input_lock(struct goog_touch_interface *gti);
+inline void goog_input_unlock(struct goog_touch_interface *gti);
+inline void goog_input_set_timestamp(
+		struct goog_touch_interface *gti,
+		struct input_dev *dev, ktime_t timestamp);
+inline void goog_input_mt_slot(
+		struct goog_touch_interface *gti,
+		struct input_dev *dev, int slot);
+inline void goog_input_mt_report_slot_state(
+		struct goog_touch_interface *gti,
+		struct input_dev *dev, unsigned int tool_type, bool active);
+inline void goog_input_report_abs(
+		struct goog_touch_interface *gti,
+		struct input_dev *dev, unsigned int code, int value);
+inline void goog_input_report_key(
+		struct goog_touch_interface *gti,
+		struct input_dev *dev, unsigned int code, int value);
+inline void goog_input_sync(struct goog_touch_interface *gti, struct input_dev *dev);
+
+int goog_input_process(struct goog_touch_interface *gti);
+struct goog_touch_interface *goog_touch_interface_probe(
+		void *vendor_private_data,
+		struct device *dev,
+		struct input_dev *input_dev,
+		int (*get_data_cb)(void *, u32, u8 **, u32 *));
+int goog_touch_interface_remove(struct goog_touch_interface *gti);
+
+#endif // _GOOG_TOUCH_INTERFACE_
+