1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * ALPS touchpad PS/2 mouse driver
4  *
5  * Copyright (c) 2003 Peter Osterlund <petero2@telia.com>
6  * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
7  */
8 
9 #ifndef _ALPS_H
10 #define _ALPS_H
11 
12 #include <linux/input/mt.h>
13 
14 #define ALPS_PROTO_V1		0x100
15 #define ALPS_PROTO_V2		0x200
16 #define ALPS_PROTO_V3		0x300
17 #define ALPS_PROTO_V3_RUSHMORE	0x310
18 #define ALPS_PROTO_V4		0x400
19 #define ALPS_PROTO_V5		0x500
20 #define ALPS_PROTO_V6		0x600
21 #define ALPS_PROTO_V7		0x700	/* t3btl t4s */
22 #define ALPS_PROTO_V8		0x800	/* SS4btl SS4s */
23 #define ALPS_PROTO_V9		0x900	/* ss3btl */
24 
25 #define MAX_TOUCHES	4
26 
27 #define DOLPHIN_COUNT_PER_ELECTRODE	64
28 #define DOLPHIN_PROFILE_XOFFSET		8	/* x-electrode offset */
29 #define DOLPHIN_PROFILE_YOFFSET		1	/* y-electrode offset */
30 
31 /*
32  * enum SS4_PACKET_ID - defines the packet type for V8
33  * SS4_PACKET_ID_IDLE: There's no finger and no button activity.
34  * SS4_PACKET_ID_ONE: There's one finger on touchpad
35  *  or there's button activities.
36  * SS4_PACKET_ID_TWO: There's two or more fingers on touchpad
37  * SS4_PACKET_ID_MULTI: There's three or more fingers on touchpad
38  * SS4_PACKET_ID_STICK: A stick pointer packet
39 */
40 enum SS4_PACKET_ID {
41 	SS4_PACKET_ID_IDLE = 0,
42 	SS4_PACKET_ID_ONE,
43 	SS4_PACKET_ID_TWO,
44 	SS4_PACKET_ID_MULTI,
45 	SS4_PACKET_ID_STICK,
46 };
47 
48 #define SS4_COUNT_PER_ELECTRODE		256
49 #define SS4_NUMSENSOR_XOFFSET		7
50 #define SS4_NUMSENSOR_YOFFSET		7
51 #define SS4_MIN_PITCH_MM		50
52 
53 #define SS4_MASK_NORMAL_BUTTONS		0x07
54 
55 #define SS4PLUS_COUNT_PER_ELECTRODE	128
56 #define SS4PLUS_NUMSENSOR_XOFFSET	16
57 #define SS4PLUS_NUMSENSOR_YOFFSET	5
58 #define SS4PLUS_MIN_PITCH_MM		37
59 
60 #define IS_SS4PLUS_DEV(_b)	(((_b[0]) == 0x73) &&	\
61 				 ((_b[1]) == 0x03) &&	\
62 				 ((_b[2]) == 0x28)		\
63 				)
64 
65 #define SS4_IS_IDLE_V2(_b)	(((_b[0]) == 0x18) &&		\
66 				 ((_b[1]) == 0x10) &&		\
67 				 ((_b[2]) == 0x00) &&		\
68 				 ((_b[3] & 0x88) == 0x08) &&	\
69 				 ((_b[4]) == 0x10) &&		\
70 				 ((_b[5]) == 0x00)		\
71 				)
72 
73 #define SS4_1F_X_V2(_b)		(((_b[0]) & 0x0007) |		\
74 				 ((_b[1] << 3) & 0x0078) |	\
75 				 ((_b[1] << 2) & 0x0380) |	\
76 				 ((_b[2] << 5) & 0x1C00)	\
77 				)
78 
79 #define SS4_1F_Y_V2(_b)		(((_b[2]) & 0x000F) |		\
80 				 ((_b[3] >> 2) & 0x0030) |	\
81 				 ((_b[4] << 6) & 0x03C0) |	\
82 				 ((_b[4] << 5) & 0x0C00)	\
83 				)
84 
85 #define SS4_1F_Z_V2(_b)		(((_b[5]) & 0x0F) |		\
86 				 ((_b[5] >> 1) & 0x70) |	\
87 				 ((_b[4]) & 0x80)		\
88 				)
89 
90 #define SS4_1F_LFB_V2(_b)	(((_b[2] >> 4) & 0x01) == 0x01)
91 
92 #define SS4_MF_LF_V2(_b, _i)	((_b[1 + (_i) * 3] & 0x0004) == 0x0004)
93 
94 #define SS4_BTN_V2(_b)		((_b[0] >> 5) & SS4_MASK_NORMAL_BUTTONS)
95 
96 #define SS4_STD_MF_X_V2(_b, _i)	(((_b[0 + (_i) * 3] << 5) & 0x00E0) |	\
97 				 ((_b[1 + _i * 3]  << 5) & 0x1F00)	\
98 				)
99 
100 #define SS4_PLUS_STD_MF_X_V2(_b, _i) (((_b[0 + (_i) * 3] << 4) & 0x0070) | \
101 				 ((_b[1 + (_i) * 3]  << 4) & 0x0F80)	\
102 				)
103 
104 #define SS4_STD_MF_Y_V2(_b, _i)	(((_b[1 + (_i) * 3] << 3) & 0x0010) |	\
105 				 ((_b[2 + (_i) * 3] << 5) & 0x01E0) |	\
106 				 ((_b[2 + (_i) * 3] << 4) & 0x0E00)	\
107 				)
108 
109 #define SS4_BTL_MF_X_V2(_b, _i)	(SS4_STD_MF_X_V2(_b, _i) |		\
110 				 ((_b[0 + (_i) * 3] >> 3) & 0x0010)	\
111 				)
112 
113 #define SS4_PLUS_BTL_MF_X_V2(_b, _i) (SS4_PLUS_STD_MF_X_V2(_b, _i) |	\
114 				 ((_b[0 + (_i) * 3] >> 4) & 0x0008)	\
115 				)
116 
117 #define SS4_BTL_MF_Y_V2(_b, _i)	(SS4_STD_MF_Y_V2(_b, _i) | \
118 				 ((_b[0 + (_i) * 3] >> 3) & 0x0008)	\
119 				)
120 
121 #define SS4_MF_Z_V2(_b, _i)	(((_b[1 + (_i) * 3]) & 0x0001) |	\
122 				 ((_b[1 + (_i) * 3] >> 1) & 0x0002)	\
123 				)
124 
125 #define SS4_IS_MF_CONTINUE(_b)	((_b[2] & 0x10) == 0x10)
126 #define SS4_IS_5F_DETECTED(_b)	((_b[2] & 0x10) == 0x10)
127 
128 #define SS4_TS_X_V2(_b)		(s8)(				\
129 				 ((_b[0] & 0x01) << 7) |	\
130 				 (_b[1] & 0x7F)		\
131 				)
132 
133 #define SS4_TS_Y_V2(_b)		-(s8)(				\
134 				 ((_b[3] & 0x01) << 7) |	\
135 				 (_b[2] & 0x7F)		\
136 				)
137 
138 #define SS4_TS_Z_V2(_b)		(s8)(_b[4] & 0x7F)
139 
140 
141 #define SS4_MFPACKET_NO_AX		8160	/* X-Coordinate value */
142 #define SS4_MFPACKET_NO_AY		4080	/* Y-Coordinate value */
143 #define SS4_MFPACKET_NO_AX_BL		8176	/* Buttonless X-Coord value */
144 #define SS4_MFPACKET_NO_AY_BL		4088	/* Buttonless Y-Coord value */
145 #define SS4_PLUS_MFPACKET_NO_AX		4080	/* SS4 PLUS, X */
146 #define SS4_PLUS_MFPACKET_NO_AX_BL	4088	/* Buttonless SS4 PLUS, X */
147 
148 /*
149  * enum V7_PACKET_ID - defines the packet type for V7
150  * V7_PACKET_ID_IDLE: There's no finger and no button activity.
151  * V7_PACKET_ID_TWO: There's one or two non-resting fingers on touchpad
152  *  or there's button activities.
153  * V7_PACKET_ID_MULTI: There are at least three non-resting fingers.
154  * V7_PACKET_ID_NEW: The finger position in slot is not continues from
155  *  previous packet.
156 */
157 enum V7_PACKET_ID {
158 	 V7_PACKET_ID_IDLE,
159 	 V7_PACKET_ID_TWO,
160 	 V7_PACKET_ID_MULTI,
161 	 V7_PACKET_ID_NEW,
162 	 V7_PACKET_ID_UNKNOWN,
163 };
164 
165 /**
166  * struct alps_protocol_info - information about protocol used by a device
167  * @version: Indicates V1/V2/V3/...
168  * @byte0: Helps figure out whether a position report packet matches the
169  *   known format for this model.  The first byte of the report, ANDed with
170  *   mask0, should match byte0.
171  * @mask0: The mask used to check the first byte of the report.
172  * @flags: Additional device capabilities (passthrough port, trackstick, etc.).
173  */
174 struct alps_protocol_info {
175 	u16 version;
176 	u8 byte0, mask0;
177 	unsigned int flags;
178 };
179 
180 /**
181  * struct alps_model_info - touchpad ID table
182  * @signature: E7 response string to match.
183  * @protocol_info: information about protocol used by the device.
184  *
185  * Many (but not all) ALPS touchpads can be identified by looking at the
186  * values returned in the "E7 report" and/or the "EC report."  This table
187  * lists a number of such touchpads.
188  */
189 struct alps_model_info {
190 	u8 signature[3];
191 	struct alps_protocol_info protocol_info;
192 };
193 
194 /**
195  * struct alps_nibble_commands - encodings for register accesses
196  * @command: PS/2 command used for the nibble
197  * @data: Data supplied as an argument to the PS/2 command, if applicable
198  *
199  * The ALPS protocol uses magic sequences to transmit binary data to the
200  * touchpad, as it is generally not OK to send arbitrary bytes out the
201  * PS/2 port.  Each of the sequences in this table sends one nibble of the
202  * register address or (write) data.  Different versions of the ALPS protocol
203  * use slightly different encodings.
204  */
205 struct alps_nibble_commands {
206 	int command;
207 	unsigned char data;
208 };
209 
210 struct alps_bitmap_point {
211 	int start_bit;
212 	int num_bits;
213 };
214 
215 /**
216  * struct alps_fields - decoded version of the report packet
217  * @x_map: Bitmap of active X positions for MT.
218  * @y_map: Bitmap of active Y positions for MT.
219  * @fingers: Number of fingers for MT.
220  * @pressure: Pressure.
221  * @st: position for ST.
222  * @mt: position for MT.
223  * @first_mp: Packet is the first of a multi-packet report.
224  * @is_mp: Packet is part of a multi-packet report.
225  * @left: Left touchpad button is active.
226  * @right: Right touchpad button is active.
227  * @middle: Middle touchpad button is active.
228  * @ts_left: Left trackstick button is active.
229  * @ts_right: Right trackstick button is active.
230  * @ts_middle: Middle trackstick button is active.
231  */
232 struct alps_fields {
233 	unsigned int x_map;
234 	unsigned int y_map;
235 	unsigned int fingers;
236 
237 	int pressure;
238 	struct input_mt_pos st;
239 	struct input_mt_pos mt[MAX_TOUCHES];
240 
241 	unsigned int first_mp:1;
242 	unsigned int is_mp:1;
243 
244 	unsigned int left:1;
245 	unsigned int right:1;
246 	unsigned int middle:1;
247 
248 	unsigned int ts_left:1;
249 	unsigned int ts_right:1;
250 	unsigned int ts_middle:1;
251 };
252 
253 /**
254  * struct alps_data - private data structure for the ALPS driver
255  * @psmouse: Pointer to parent psmouse device
256  * @dev2: Trackstick device (can be NULL).
257  * @dev3: Generic PS/2 mouse (can be NULL, delayed registering).
258  * @phys2: Physical path for the trackstick device.
259  * @phys3: Physical path for the generic PS/2 mouse.
260  * @dev3_register_work: Delayed work for registering PS/2 mouse.
261  * @nibble_commands: Command mapping used for touchpad register accesses.
262  * @addr_command: Command used to tell the touchpad that a register address
263  *   follows.
264  * @proto_version: Indicates V1/V2/V3/...
265  * @byte0: Helps figure out whether a position report packet matches the
266  *   known format for this model.  The first byte of the report, ANDed with
267  *   mask0, should match byte0.
268  * @mask0: The mask used to check the first byte of the report.
269  * @fw_ver: cached copy of firmware version (EC report)
270  * @flags: Additional device capabilities (passthrough port, trackstick, etc.).
271  * @x_max: Largest possible X position value.
272  * @y_max: Largest possible Y position value.
273  * @x_bits: Number of X bits in the MT bitmap.
274  * @y_bits: Number of Y bits in the MT bitmap.
275  * @hw_init: Protocol-specific hardware init function.
276  * @process_packet: Protocol-specific function to process a report packet.
277  * @decode_fields: Protocol-specific function to read packet bitfields.
278  * @set_abs_params: Protocol-specific function to configure the input_dev.
279  * @prev_fin: Finger bit from previous packet.
280  * @multi_packet: Multi-packet data in progress.
281  * @multi_data: Saved multi-packet data.
282  * @f: Decoded packet data fields.
283  * @quirks: Bitmap of ALPS_QUIRK_*.
284  * @timer: Timer for flushing out the final report packet in the stream.
285  */
286 struct alps_data {
287 	struct psmouse *psmouse;
288 	struct input_dev *dev2;
289 	struct input_dev *dev3;
290 	char phys2[32];
291 	char phys3[32];
292 	struct delayed_work dev3_register_work;
293 
294 	/* these are autodetected when the device is identified */
295 	const struct alps_nibble_commands *nibble_commands;
296 	int addr_command;
297 	u16 proto_version;
298 	u8 byte0, mask0;
299 	u8 dev_id[3];
300 	u8 fw_ver[3];
301 	int flags;
302 	int x_max;
303 	int y_max;
304 	int x_bits;
305 	int y_bits;
306 	unsigned int x_res;
307 	unsigned int y_res;
308 
309 	int (*hw_init)(struct psmouse *psmouse);
310 	void (*process_packet)(struct psmouse *psmouse);
311 	int (*decode_fields)(struct alps_fields *f, unsigned char *p,
312 			      struct psmouse *psmouse);
313 	void (*set_abs_params)(struct alps_data *priv, struct input_dev *dev1);
314 
315 	int prev_fin;
316 	int multi_packet;
317 	int second_touch;
318 	unsigned char multi_data[6];
319 	struct alps_fields f;
320 	u8 quirks;
321 	struct timer_list timer;
322 };
323 
324 #define ALPS_QUIRK_TRACKSTICK_BUTTONS	1 /* trakcstick buttons in trackstick packet */
325 
326 int alps_detect(struct psmouse *psmouse, bool set_properties);
327 int alps_init(struct psmouse *psmouse);
328 
329 #endif
330