1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * OLPC HGPK (XO-1) touchpad PS/2 mouse driver
4  */
5 
6 #ifndef _HGPK_H
7 #define _HGPK_H
8 
9 #define HGPK_GS		0xff       /* The GlideSensor */
10 #define HGPK_PT		0xcf       /* The PenTablet */
11 
12 enum hgpk_model_t {
13 	HGPK_MODEL_PREA = 0x0a,	/* pre-B1s */
14 	HGPK_MODEL_A = 0x14,	/* found on B1s, PT disabled in hardware */
15 	HGPK_MODEL_B = 0x28,	/* B2s, has capacitance issues */
16 	HGPK_MODEL_C = 0x3c,
17 	HGPK_MODEL_D = 0x50,	/* C1, mass production */
18 };
19 
20 enum hgpk_spew_flag {
21 	NO_SPEW,
22 	MAYBE_SPEWING,
23 	SPEW_DETECTED,
24 	RECALIBRATING,
25 };
26 
27 #define SPEW_WATCH_COUNT 42  /* at 12ms/packet, this is 1/2 second */
28 
29 enum hgpk_mode {
30 	HGPK_MODE_MOUSE,
31 	HGPK_MODE_GLIDESENSOR,
32 	HGPK_MODE_PENTABLET,
33 	HGPK_MODE_INVALID
34 };
35 
36 struct hgpk_data {
37 	struct psmouse *psmouse;
38 	enum hgpk_mode mode;
39 	bool powered;
40 	enum hgpk_spew_flag spew_flag;
41 	int spew_count, x_tally, y_tally;	/* spew detection */
42 	unsigned long recalib_window;
43 	struct delayed_work recalib_wq;
44 	int abs_x, abs_y;
45 	int dupe_count;
46 	int xbigj, ybigj, xlast, ylast; /* jumpiness detection */
47 	int xsaw_secondary, ysaw_secondary; /* jumpiness detection */
48 };
49 
50 int hgpk_detect(struct psmouse *psmouse, bool set_properties);
51 int hgpk_init(struct psmouse *psmouse);
52 
53 #ifdef CONFIG_MOUSE_PS2_OLPC
54 void hgpk_module_init(void);
55 #else
hgpk_module_init(void)56 static inline void hgpk_module_init(void)
57 {
58 }
59 #endif
60 
61 #endif
62