e9e8520f22
The current code tries to consider all states and transitions to properly detect which finger is attached to which slot. The code is quite huge and difficult to read. If the sensor manages to group the touch points but is not reliable in giving tracking ids, we can simply use the kernel tracking method. Note that it is already used by Cr-48 Chromebooks. Incidentaly, this fixes a bug reported by Peter Hutterer: """ on the Lenovo T440, run: evemu-record /dev/input/event4 | grep BTN_ then put one, two, three, two fingers down when you go from 3 to 2 fingers the driver sends a spurious BTN_TOUCH 0 event: E: 0.000000 0001 014a 0001 # EV_KEY / BTN_TOUCH 1 E: 0.000000 0001 0145 0001 # EV_KEY / BTN_TOOL_FINGER 1 E: 0.770008 0001 0145 0000 # EV_KEY / BTN_TOOL_FINGER 0 E: 0.770008 0001 014d 0001 # EV_KEY / BTN_TOOL_DOUBLETAP 1 E: 1.924716 0001 014d 0000 # EV_KEY / BTN_TOOL_DOUBLETAP 0 E: 1.924716 0001 014e 0001 # EV_KEY / BTN_TOOL_TRIPLETAP 1 .. changing from 3 to 2 fingers now E: 3.152641 0001 014a 0000 # EV_KEY / BTN_TOUCH 0 E: 3.152641 0001 014d 0001 # EV_KEY / BTN_TOOL_DOUBLETAP 1 E: 3.152641 0001 014e 0000 # EV_KEY / BTN_TOOL_TRIPLETAP 0 E: 3.176948 0001 014a 0001 # EV_KEY / BTN_TOUCH 1 quick look in the kernel shows it's caused by hw.z going to 0 for a packet, so probably a firmware bug. either way, it makes it hard to track BTN_TOUCH as signal that at least one finger is down. """ The in-kernel tracking is enough to remove this spurious BTN_TOUCH 0. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
181 lines
6.2 KiB
C
181 lines
6.2 KiB
C
/*
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* Synaptics TouchPad PS/2 mouse driver
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#ifndef _SYNAPTICS_H
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#define _SYNAPTICS_H
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/* synaptics queries */
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#define SYN_QUE_IDENTIFY 0x00
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#define SYN_QUE_MODES 0x01
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#define SYN_QUE_CAPABILITIES 0x02
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#define SYN_QUE_MODEL 0x03
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#define SYN_QUE_SERIAL_NUMBER_PREFIX 0x06
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#define SYN_QUE_SERIAL_NUMBER_SUFFIX 0x07
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#define SYN_QUE_RESOLUTION 0x08
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#define SYN_QUE_EXT_CAPAB 0x09
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#define SYN_QUE_FIRMWARE_ID 0x0a
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#define SYN_QUE_EXT_CAPAB_0C 0x0c
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#define SYN_QUE_EXT_MAX_COORDS 0x0d
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#define SYN_QUE_EXT_MIN_COORDS 0x0f
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/* synatics modes */
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#define SYN_BIT_ABSOLUTE_MODE (1 << 7)
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#define SYN_BIT_HIGH_RATE (1 << 6)
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#define SYN_BIT_SLEEP_MODE (1 << 3)
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#define SYN_BIT_DISABLE_GESTURE (1 << 2)
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#define SYN_BIT_FOUR_BYTE_CLIENT (1 << 1)
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#define SYN_BIT_W_MODE (1 << 0)
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/* synaptics model ID bits */
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#define SYN_MODEL_ROT180(m) ((m) & (1 << 23))
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#define SYN_MODEL_PORTRAIT(m) ((m) & (1 << 22))
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#define SYN_MODEL_SENSOR(m) (((m) >> 16) & 0x3f)
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#define SYN_MODEL_HARDWARE(m) (((m) >> 9) & 0x7f)
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#define SYN_MODEL_NEWABS(m) ((m) & (1 << 7))
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#define SYN_MODEL_PEN(m) ((m) & (1 << 6))
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#define SYN_MODEL_SIMPLIC(m) ((m) & (1 << 5))
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#define SYN_MODEL_GEOMETRY(m) ((m) & 0x0f)
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/* synaptics capability bits */
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#define SYN_CAP_EXTENDED(c) ((c) & (1 << 23))
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#define SYN_CAP_MIDDLE_BUTTON(c) ((c) & (1 << 18))
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#define SYN_CAP_PASS_THROUGH(c) ((c) & (1 << 7))
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#define SYN_CAP_SLEEP(c) ((c) & (1 << 4))
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#define SYN_CAP_FOUR_BUTTON(c) ((c) & (1 << 3))
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#define SYN_CAP_MULTIFINGER(c) ((c) & (1 << 1))
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#define SYN_CAP_PALMDETECT(c) ((c) & (1 << 0))
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#define SYN_CAP_SUBMODEL_ID(c) (((c) & 0x00ff00) >> 8)
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#define SYN_EXT_CAP_REQUESTS(c) (((c) & 0x700000) >> 20)
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#define SYN_CAP_MULTI_BUTTON_NO(ec) (((ec) & 0x00f000) >> 12)
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#define SYN_CAP_PRODUCT_ID(ec) (((ec) & 0xff0000) >> 16)
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/*
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* The following describes response for the 0x0c query.
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*
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* byte mask name meaning
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* ---- ---- ------- ------------
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* 1 0x01 adjustable threshold capacitive button sensitivity
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* can be adjusted
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* 1 0x02 report max query 0x0d gives max coord reported
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* 1 0x04 clearpad sensor is ClearPad product
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* 1 0x08 advanced gesture not particularly meaningful
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* 1 0x10 clickpad bit 0 1-button ClickPad
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* 1 0x60 multifinger mode identifies firmware finger counting
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* (not reporting!) algorithm.
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* Not particularly meaningful
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* 1 0x80 covered pad W clipped to 14, 15 == pad mostly covered
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* 2 0x01 clickpad bit 1 2-button ClickPad
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* 2 0x02 deluxe LED controls touchpad support LED commands
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* ala multimedia control bar
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* 2 0x04 reduced filtering firmware does less filtering on
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* position data, driver should watch
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* for noise.
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* 2 0x08 image sensor image sensor tracks 5 fingers, but only
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* reports 2.
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* 2 0x01 uniform clickpad whole clickpad moves instead of being
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* hinged at the top.
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* 2 0x20 report min query 0x0f gives min coord reported
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*/
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#define SYN_CAP_CLICKPAD(ex0c) ((ex0c) & 0x100000) /* 1-button ClickPad */
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#define SYN_CAP_CLICKPAD2BTN(ex0c) ((ex0c) & 0x000100) /* 2-button ClickPad */
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#define SYN_CAP_MAX_DIMENSIONS(ex0c) ((ex0c) & 0x020000)
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#define SYN_CAP_MIN_DIMENSIONS(ex0c) ((ex0c) & 0x002000)
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#define SYN_CAP_ADV_GESTURE(ex0c) ((ex0c) & 0x080000)
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#define SYN_CAP_REDUCED_FILTERING(ex0c) ((ex0c) & 0x000400)
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#define SYN_CAP_IMAGE_SENSOR(ex0c) ((ex0c) & 0x000800)
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/* synaptics modes query bits */
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#define SYN_MODE_ABSOLUTE(m) ((m) & (1 << 7))
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#define SYN_MODE_RATE(m) ((m) & (1 << 6))
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#define SYN_MODE_BAUD_SLEEP(m) ((m) & (1 << 3))
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#define SYN_MODE_DISABLE_GESTURE(m) ((m) & (1 << 2))
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#define SYN_MODE_PACKSIZE(m) ((m) & (1 << 1))
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#define SYN_MODE_WMODE(m) ((m) & (1 << 0))
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/* synaptics identify query bits */
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#define SYN_ID_MODEL(i) (((i) >> 4) & 0x0f)
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#define SYN_ID_MAJOR(i) ((i) & 0x0f)
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#define SYN_ID_MINOR(i) (((i) >> 16) & 0xff)
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#define SYN_ID_FULL(i) ((SYN_ID_MAJOR(i) << 8) | SYN_ID_MINOR(i))
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#define SYN_ID_IS_SYNAPTICS(i) ((((i) >> 8) & 0xff) == 0x47)
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#define SYN_ID_DISGEST_SUPPORTED(i) (SYN_ID_MAJOR(i) >= 4)
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/* synaptics special commands */
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#define SYN_PS_SET_MODE2 0x14
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#define SYN_PS_CLIENT_CMD 0x28
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/* synaptics packet types */
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#define SYN_NEWABS 0
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#define SYN_NEWABS_STRICT 1
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#define SYN_NEWABS_RELAXED 2
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#define SYN_OLDABS 3
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/* amount to fuzz position data when touchpad reports reduced filtering */
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#define SYN_REDUCED_FILTER_FUZZ 8
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/*
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* A structure to describe the state of the touchpad hardware (buttons and pad)
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*/
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struct synaptics_hw_state {
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int x;
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int y;
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int z;
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int w;
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unsigned int left:1;
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unsigned int right:1;
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unsigned int middle:1;
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unsigned int up:1;
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unsigned int down:1;
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unsigned char ext_buttons;
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signed char scroll;
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};
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struct synaptics_data {
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/* Data read from the touchpad */
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unsigned long int model_id; /* Model-ID */
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unsigned long int firmware_id; /* Firmware-ID */
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unsigned long int board_id; /* Board-ID */
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unsigned long int capabilities; /* Capabilities */
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unsigned long int ext_cap; /* Extended Capabilities */
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unsigned long int ext_cap_0c; /* Ext Caps from 0x0c query */
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unsigned long int identity; /* Identification */
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unsigned int x_res, y_res; /* X/Y resolution in units/mm */
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unsigned int x_max, y_max; /* Max coordinates (from FW) */
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unsigned int x_min, y_min; /* Min coordinates (from FW) */
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unsigned char pkt_type; /* packet type - old, new, etc */
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unsigned char mode; /* current mode byte */
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int scroll;
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bool absolute_mode; /* run in Absolute mode */
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bool disable_gesture; /* disable gestures */
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struct serio *pt_port; /* Pass-through serio port */
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/*
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* Last received Advanced Gesture Mode (AGM) packet. An AGM packet
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* contains position data for a second contact, at half resolution.
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*/
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struct synaptics_hw_state agm;
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unsigned int agm_count; /* finger count reported by agm */
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/* ForcePad handling */
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unsigned long press_start;
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bool press;
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bool report_press;
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};
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void synaptics_module_init(void);
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int synaptics_detect(struct psmouse *psmouse, bool set_properties);
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int synaptics_init(struct psmouse *psmouse);
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int synaptics_init_relative(struct psmouse *psmouse);
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void synaptics_reset(struct psmouse *psmouse);
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bool synaptics_supported(void);
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#endif /* _SYNAPTICS_H */
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