1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/input/mouse/hgpk.h b/drivers/input/mouse/hgpk.h
new file mode 100644
index 0000000000..ce041591f1
--- /dev/null
+++ b/drivers/input/mouse/hgpk.h
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * OLPC HGPK (XO-1) touchpad PS/2 mouse driver
+ */
+
+#ifndef _HGPK_H
+#define _HGPK_H
+
+#define HGPK_GS		0xff       /* The GlideSensor */
+#define HGPK_PT		0xcf       /* The PenTablet */
+
+enum hgpk_model_t {
+	HGPK_MODEL_PREA = 0x0a,	/* pre-B1s */
+	HGPK_MODEL_A = 0x14,	/* found on B1s, PT disabled in hardware */
+	HGPK_MODEL_B = 0x28,	/* B2s, has capacitance issues */
+	HGPK_MODEL_C = 0x3c,
+	HGPK_MODEL_D = 0x50,	/* C1, mass production */
+};
+
+enum hgpk_spew_flag {
+	NO_SPEW,
+	MAYBE_SPEWING,
+	SPEW_DETECTED,
+	RECALIBRATING,
+};
+
+#define SPEW_WATCH_COUNT 42  /* at 12ms/packet, this is 1/2 second */
+
+enum hgpk_mode {
+	HGPK_MODE_MOUSE,
+	HGPK_MODE_GLIDESENSOR,
+	HGPK_MODE_PENTABLET,
+	HGPK_MODE_INVALID
+};
+
+struct hgpk_data {
+	struct psmouse *psmouse;
+	enum hgpk_mode mode;
+	bool powered;
+	enum hgpk_spew_flag spew_flag;
+	int spew_count, x_tally, y_tally;	/* spew detection */
+	unsigned long recalib_window;
+	struct delayed_work recalib_wq;
+	int abs_x, abs_y;
+	int dupe_count;
+	int xbigj, ybigj, xlast, ylast; /* jumpiness detection */
+	int xsaw_secondary, ysaw_secondary; /* jumpiness detection */
+};
+
+int hgpk_detect(struct psmouse *psmouse, bool set_properties);
+int hgpk_init(struct psmouse *psmouse);
+
+#ifdef CONFIG_MOUSE_PS2_OLPC
+void hgpk_module_init(void);
+#else
+static inline void hgpk_module_init(void)
+{
+}
+#endif
+
+#endif