1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Synaptics TouchPad PS/2 mouse driver
4  */
5 
6 #ifndef _SYNAPTICS_H
7 #define _SYNAPTICS_H
8 
9 /* synaptics queries */
10 #define SYN_QUE_IDENTIFY		0x00
11 #define SYN_QUE_MODES			0x01
12 #define SYN_QUE_CAPABILITIES		0x02
13 #define SYN_QUE_MODEL			0x03
14 #define SYN_QUE_SERIAL_NUMBER_PREFIX	0x06
15 #define SYN_QUE_SERIAL_NUMBER_SUFFIX	0x07
16 #define SYN_QUE_RESOLUTION		0x08
17 #define SYN_QUE_EXT_CAPAB		0x09
18 #define SYN_QUE_FIRMWARE_ID		0x0a
19 #define SYN_QUE_EXT_CAPAB_0C		0x0c
20 #define SYN_QUE_EXT_MAX_COORDS		0x0d
21 #define SYN_QUE_EXT_MIN_COORDS		0x0f
22 #define SYN_QUE_MEXT_CAPAB_10		0x10
23 
24 /* synatics modes */
25 #define SYN_BIT_ABSOLUTE_MODE		BIT(7)
26 #define SYN_BIT_HIGH_RATE		BIT(6)
27 #define SYN_BIT_SLEEP_MODE		BIT(3)
28 #define SYN_BIT_DISABLE_GESTURE		BIT(2)
29 #define SYN_BIT_FOUR_BYTE_CLIENT	BIT(1)
30 #define SYN_BIT_W_MODE			BIT(0)
31 
32 /* synaptics model ID bits */
33 #define SYN_MODEL_ROT180(m)		((m) & BIT(23))
34 #define SYN_MODEL_PORTRAIT(m)		((m) & BIT(22))
35 #define SYN_MODEL_SENSOR(m)		(((m) & GENMASK(21, 16)) >> 16)
36 #define SYN_MODEL_HARDWARE(m)		(((m) & GENMASK(15, 9)) >> 9)
37 #define SYN_MODEL_NEWABS(m)		((m) & BIT(7))
38 #define SYN_MODEL_PEN(m)		((m) & BIT(6))
39 #define SYN_MODEL_SIMPLIC(m)		((m) & BIT(5))
40 #define SYN_MODEL_GEOMETRY(m)		((m) & GENMASK(3, 0))
41 
42 /* synaptics capability bits */
43 #define SYN_CAP_EXTENDED(c)		((c) & BIT(23))
44 #define SYN_CAP_MIDDLE_BUTTON(c)	((c) & BIT(18))
45 #define SYN_CAP_PASS_THROUGH(c)		((c) & BIT(7))
46 #define SYN_CAP_SLEEP(c)		((c) & BIT(4))
47 #define SYN_CAP_FOUR_BUTTON(c)		((c) & BIT(3))
48 #define SYN_CAP_MULTIFINGER(c)		((c) & BIT(1))
49 #define SYN_CAP_PALMDETECT(c)		((c) & BIT(0))
50 #define SYN_CAP_SUBMODEL_ID(c)		(((c) & GENMASK(15, 8)) >> 8)
51 #define SYN_EXT_CAP_REQUESTS(c)		(((c) & GENMASK(22, 20)) >> 20)
52 #define SYN_CAP_MB_MASK			GENMASK(15, 12)
53 #define SYN_CAP_MULTI_BUTTON_NO(ec)	(((ec) & SYN_CAP_MB_MASK) >> 12)
54 #define SYN_CAP_PRODUCT_ID(ec)		(((ec) & GENMASK(23, 16)) >> 16)
55 #define SYN_MEXT_CAP_BIT(m)		((m) & BIT(1))
56 
57 /*
58  * The following describes response for the 0x0c query.
59  *
60  * byte	mask	name			meaning
61  * ----	----	-------			------------
62  * 1	0x01	adjustable threshold	capacitive button sensitivity
63  *					can be adjusted
64  * 1	0x02	report max		query 0x0d gives max coord reported
65  * 1	0x04	clearpad		sensor is ClearPad product
66  * 1	0x08	advanced gesture	not particularly meaningful
67  * 1	0x10	clickpad bit 0		1-button ClickPad
68  * 1	0x60	multifinger mode	identifies firmware finger counting
69  *					(not reporting!) algorithm.
70  *					Not particularly meaningful
71  * 1	0x80	covered pad		W clipped to 14, 15 == pad mostly covered
72  * 2	0x01	clickpad bit 1		2-button ClickPad
73  * 2	0x02	deluxe LED controls	touchpad support LED commands
74  *					ala multimedia control bar
75  * 2	0x04	reduced filtering	firmware does less filtering on
76  *					position data, driver should watch
77  *					for noise.
78  * 2	0x08	image sensor		image sensor tracks 5 fingers, but only
79  *					reports 2.
80  * 2	0x01	uniform clickpad	whole clickpad moves instead of being
81  *					hinged at the top.
82  * 2	0x20	report min		query 0x0f gives min coord reported
83  */
84 #define SYN_CAP_CLICKPAD(ex0c)		((ex0c) & BIT(20)) /* 1-button ClickPad */
85 #define SYN_CAP_CLICKPAD2BTN(ex0c)	((ex0c) & BIT(8))  /* 2-button ClickPad */
86 #define SYN_CAP_MAX_DIMENSIONS(ex0c)	((ex0c) & BIT(17))
87 #define SYN_CAP_MIN_DIMENSIONS(ex0c)	((ex0c) & BIT(13))
88 #define SYN_CAP_ADV_GESTURE(ex0c)	((ex0c) & BIT(19))
89 #define SYN_CAP_REDUCED_FILTERING(ex0c)	((ex0c) & BIT(10))
90 #define SYN_CAP_IMAGE_SENSOR(ex0c)	((ex0c) & BIT(11))
91 #define SYN_CAP_INTERTOUCH(ex0c)	((ex0c) & BIT(14))
92 
93 /*
94  * The following descibes response for the 0x10 query.
95  *
96  * byte	mask	name			meaning
97  * ----	----	-------			------------
98  * 1	0x01	ext buttons are stick	buttons exported in the extended
99  *					capability are actually meant to be used
100  *					by the tracktick (pass-through).
101  * 1	0x02	SecurePad		the touchpad is a SecurePad, so it
102  *					contains a built-in fingerprint reader.
103  * 1	0xe0	more ext count		how many more extented queries are
104  *					available after this one.
105  * 2	0xff	SecurePad width		the width of the SecurePad fingerprint
106  *					reader.
107  * 3	0xff	SecurePad height	the height of the SecurePad fingerprint
108  *					reader.
109  */
110 #define SYN_CAP_EXT_BUTTONS_STICK(ex10)	((ex10) & BIT(16))
111 #define SYN_CAP_SECUREPAD(ex10)		((ex10) & BIT(17))
112 
113 #define SYN_EXT_BUTTON_STICK_L(eb)	(((eb) & BIT(0)) >> 0)
114 #define SYN_EXT_BUTTON_STICK_M(eb)	(((eb) & BIT(1)) >> 1)
115 #define SYN_EXT_BUTTON_STICK_R(eb)	(((eb) & BIT(2)) >> 2)
116 
117 /* synaptics modes query bits */
118 #define SYN_MODE_ABSOLUTE(m)		((m) & BIT(7))
119 #define SYN_MODE_RATE(m)		((m) & BIT(6))
120 #define SYN_MODE_BAUD_SLEEP(m)		((m) & BIT(3))
121 #define SYN_MODE_DISABLE_GESTURE(m)	((m) & BIT(2))
122 #define SYN_MODE_PACKSIZE(m)		((m) & BIT(1))
123 #define SYN_MODE_WMODE(m)		((m) & BIT(0))
124 
125 /* synaptics identify query bits */
126 #define SYN_ID_MODEL(i)			(((i) & GENMASK(7, 4)) >> 4)
127 #define SYN_ID_MAJOR(i)			(((i) & GENMASK(3, 0)) >> 0)
128 #define SYN_ID_MINOR(i)			(((i) & GENMASK(23, 16)) >> 16)
129 #define SYN_ID_FULL(i)			((SYN_ID_MAJOR(i) << 8) | SYN_ID_MINOR(i))
130 #define SYN_ID_IS_SYNAPTICS(i)		(((i) & GENMASK(15, 8)) == 0x004700U)
131 #define SYN_ID_DISGEST_SUPPORTED(i)	(SYN_ID_MAJOR(i) >= 4)
132 
133 /* synaptics special commands */
134 #define SYN_PS_SET_MODE2		0x14
135 #define SYN_PS_CLIENT_CMD		0x28
136 
137 /* amount to fuzz position data when touchpad reports reduced filtering */
138 #define SYN_REDUCED_FILTER_FUZZ		8
139 
140 /* synaptics packet types */
141 enum synaptics_pkt_type {
142 	SYN_NEWABS,
143 	SYN_NEWABS_STRICT,
144 	SYN_NEWABS_RELAXED,
145 	SYN_OLDABS,
146 };
147 
148 /*
149  * A structure to describe the state of the touchpad hardware (buttons and pad)
150  */
151 struct synaptics_hw_state {
152 	int x;
153 	int y;
154 	int z;
155 	int w;
156 	unsigned int left:1;
157 	unsigned int right:1;
158 	unsigned int middle:1;
159 	unsigned int up:1;
160 	unsigned int down:1;
161 	u8 ext_buttons;
162 	s8 scroll;
163 };
164 
165 /* Data read from the touchpad */
166 struct synaptics_device_info {
167 	u32 model_id;		/* Model-ID */
168 	u32 firmware_id;	/* Firmware-ID */
169 	u32 board_id;		/* Board-ID */
170 	u32 capabilities;	/* Capabilities */
171 	u32 ext_cap;		/* Extended Capabilities */
172 	u32 ext_cap_0c;		/* Ext Caps from 0x0c query */
173 	u32 ext_cap_10;		/* Ext Caps from 0x10 query */
174 	u32 identity;		/* Identification */
175 	u32 x_res, y_res;	/* X/Y resolution in units/mm */
176 	u32 x_max, y_max;	/* Max coordinates (from FW) */
177 	u32 x_min, y_min;	/* Min coordinates (from FW) */
178 };
179 
180 struct synaptics_data {
181 	struct synaptics_device_info info;
182 
183 	enum synaptics_pkt_type pkt_type;	/* packet type - old, new, etc */
184 	u8 mode;				/* current mode byte */
185 	int scroll;
186 
187 	bool absolute_mode;			/* run in Absolute mode */
188 	bool disable_gesture;			/* disable gestures */
189 
190 	struct serio *pt_port;			/* Pass-through serio port */
191 
192 	/*
193 	 * Last received Advanced Gesture Mode (AGM) packet. An AGM packet
194 	 * contains position data for a second contact, at half resolution.
195 	 */
196 	struct synaptics_hw_state agm;
197 	unsigned int agm_count;			/* finger count reported by agm */
198 
199 	/* ForcePad handling */
200 	unsigned long				press_start;
201 	bool					press;
202 	bool					report_press;
203 	bool					is_forcepad;
204 };
205 
206 void synaptics_module_init(void);
207 int synaptics_detect(struct psmouse *psmouse, bool set_properties);
208 int synaptics_init_absolute(struct psmouse *psmouse);
209 int synaptics_init_relative(struct psmouse *psmouse);
210 int synaptics_init_smbus(struct psmouse *psmouse);
211 int synaptics_init(struct psmouse *psmouse);
212 void synaptics_reset(struct psmouse *psmouse);
213 
214 #endif /* _SYNAPTICS_H */
215