forked from Minki/linux
7968a5dd49
Currently, the synaptics driver puts the device into Absolute mode. As explained in the synaptics documentation section 3.2, in this mode, the device sends a continuous stream of packets at the maximum rate to the host when the user's fingers are near or on the pad or pressing buttons, and continues streaming for 1 second afterwards. These packets are even sent when there is no new information to report, even when they are duplicates of the previous packet. For embedded systems this is a bit much - it results in a huge and uninterrupted stream of interrupts at high rate. This patch adds support for Relative mode, which can be selected as a new psmouse protocol. In this mode, the device does not send duplicate packets and acts like a standard PS/2 mouse. However, synaptics-specific functionality is still available, such as the ability to set the packet rate, and rather than disabling gestures and taps at the hardware level unconditionally, a 'synaptics_disable_gesture' sysfs attribute has been added to allow control of this functionality. This solves a long standing OLPC issue: synaptics hardware enables tap to click by default (even in the default relative mode), but we have found this to be inappropriate for young children and first time computer users. Enabling the synaptics driver disables tap-to-click, but we have previously been unable to use this because it also enables Absolute mode, which is too "spammy" for our desires and actually overloads our EC with its continuous stream of packets. Now we can enable the synaptics driver, disabling tap to click while retaining the less noisy Relative mode. Signed-off-by: Daniel Drake <dsd@laptop.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
182 lines
5.4 KiB
C
182 lines
5.4 KiB
C
#ifndef _PSMOUSE_H
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#define _PSMOUSE_H
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#define PSMOUSE_CMD_SETSCALE11 0x00e6
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#define PSMOUSE_CMD_SETSCALE21 0x00e7
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#define PSMOUSE_CMD_SETRES 0x10e8
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#define PSMOUSE_CMD_GETINFO 0x03e9
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#define PSMOUSE_CMD_SETSTREAM 0x00ea
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#define PSMOUSE_CMD_SETPOLL 0x00f0
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#define PSMOUSE_CMD_POLL 0x00eb /* caller sets number of bytes to receive */
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#define PSMOUSE_CMD_RESET_WRAP 0x00ec
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#define PSMOUSE_CMD_GETID 0x02f2
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#define PSMOUSE_CMD_SETRATE 0x10f3
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#define PSMOUSE_CMD_ENABLE 0x00f4
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#define PSMOUSE_CMD_DISABLE 0x00f5
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#define PSMOUSE_CMD_RESET_DIS 0x00f6
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#define PSMOUSE_CMD_RESET_BAT 0x02ff
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#define PSMOUSE_RET_BAT 0xaa
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#define PSMOUSE_RET_ID 0x00
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#define PSMOUSE_RET_ACK 0xfa
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#define PSMOUSE_RET_NAK 0xfe
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enum psmouse_state {
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PSMOUSE_IGNORE,
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PSMOUSE_INITIALIZING,
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PSMOUSE_RESYNCING,
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PSMOUSE_CMD_MODE,
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PSMOUSE_ACTIVATED,
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};
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/* psmouse protocol handler return codes */
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typedef enum {
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PSMOUSE_BAD_DATA,
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PSMOUSE_GOOD_DATA,
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PSMOUSE_FULL_PACKET
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} psmouse_ret_t;
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struct psmouse {
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void *private;
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struct input_dev *dev;
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struct ps2dev ps2dev;
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struct delayed_work resync_work;
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char *vendor;
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char *name;
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unsigned char packet[8];
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unsigned char badbyte;
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unsigned char pktcnt;
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unsigned char pktsize;
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unsigned char type;
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bool ignore_parity;
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bool acks_disable_command;
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unsigned int model;
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unsigned long last;
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unsigned long out_of_sync_cnt;
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unsigned long num_resyncs;
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enum psmouse_state state;
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char devname[64];
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char phys[32];
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unsigned int rate;
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unsigned int resolution;
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unsigned int resetafter;
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unsigned int resync_time;
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bool smartscroll; /* Logitech only */
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psmouse_ret_t (*protocol_handler)(struct psmouse *psmouse);
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void (*set_rate)(struct psmouse *psmouse, unsigned int rate);
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void (*set_resolution)(struct psmouse *psmouse, unsigned int resolution);
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int (*reconnect)(struct psmouse *psmouse);
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void (*disconnect)(struct psmouse *psmouse);
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void (*cleanup)(struct psmouse *psmouse);
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int (*poll)(struct psmouse *psmouse);
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void (*pt_activate)(struct psmouse *psmouse);
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void (*pt_deactivate)(struct psmouse *psmouse);
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};
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enum psmouse_type {
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PSMOUSE_NONE,
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PSMOUSE_PS2,
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PSMOUSE_PS2PP,
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PSMOUSE_THINKPS,
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PSMOUSE_GENPS,
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PSMOUSE_IMPS,
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PSMOUSE_IMEX,
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PSMOUSE_SYNAPTICS,
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PSMOUSE_ALPS,
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PSMOUSE_LIFEBOOK,
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PSMOUSE_TRACKPOINT,
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PSMOUSE_TOUCHKIT_PS2,
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PSMOUSE_CORTRON,
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PSMOUSE_HGPK,
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PSMOUSE_ELANTECH,
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PSMOUSE_FSP,
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PSMOUSE_SYNAPTICS_RELATIVE,
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PSMOUSE_AUTO /* This one should always be last */
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};
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void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
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unsigned long delay);
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int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command);
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int psmouse_reset(struct psmouse *psmouse);
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void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state);
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void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution);
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psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse);
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struct psmouse_attribute {
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struct device_attribute dattr;
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void *data;
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ssize_t (*show)(struct psmouse *psmouse, void *data, char *buf);
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ssize_t (*set)(struct psmouse *psmouse, void *data,
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const char *buf, size_t count);
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bool protect;
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};
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#define to_psmouse_attr(a) container_of((a), struct psmouse_attribute, dattr)
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ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *attr,
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char *buf);
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ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count);
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#define __PSMOUSE_DEFINE_ATTR_VAR(_name, _mode, _data, _show, _set, _protect) \
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static struct psmouse_attribute psmouse_attr_##_name = { \
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.dattr = { \
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.attr = { \
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.name = __stringify(_name), \
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.mode = _mode, \
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}, \
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.show = psmouse_attr_show_helper, \
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.store = psmouse_attr_set_helper, \
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}, \
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.data = _data, \
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.show = _show, \
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.set = _set, \
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.protect = _protect, \
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}
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#define __PSMOUSE_DEFINE_ATTR(_name, _mode, _data, _show, _set, _protect) \
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static ssize_t _show(struct psmouse *, void *, char *); \
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static ssize_t _set(struct psmouse *, void *, const char *, size_t); \
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__PSMOUSE_DEFINE_ATTR_VAR(_name, _mode, _data, _show, _set, _protect)
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#define PSMOUSE_DEFINE_ATTR(_name, _mode, _data, _show, _set) \
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__PSMOUSE_DEFINE_ATTR(_name, _mode, _data, _show, _set, true)
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#define PSMOUSE_DEFINE_RO_ATTR(_name, _mode, _data, _show) \
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static ssize_t _show(struct psmouse *, void *, char *); \
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__PSMOUSE_DEFINE_ATTR_VAR(_name, _mode, _data, _show, NULL, true)
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#define PSMOUSE_DEFINE_WO_ATTR(_name, _mode, _data, _set) \
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static ssize_t _set(struct psmouse *, void *, const char *, size_t); \
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__PSMOUSE_DEFINE_ATTR_VAR(_name, _mode, _data, NULL, _set, true)
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#ifndef psmouse_fmt
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#define psmouse_fmt(fmt) KBUILD_BASENAME ": " fmt
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#endif
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#define psmouse_dbg(psmouse, format, ...) \
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dev_dbg(&(psmouse)->ps2dev.serio->dev, \
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psmouse_fmt(format), ##__VA_ARGS__)
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#define psmouse_info(psmouse, format, ...) \
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dev_info(&(psmouse)->ps2dev.serio->dev, \
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psmouse_fmt(format), ##__VA_ARGS__)
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#define psmouse_warn(psmouse, format, ...) \
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dev_warn(&(psmouse)->ps2dev.serio->dev, \
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psmouse_fmt(format), ##__VA_ARGS__)
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#define psmouse_err(psmouse, format, ...) \
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dev_err(&(psmouse)->ps2dev.serio->dev, \
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psmouse_fmt(format), ##__VA_ARGS__)
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#define psmouse_notice(psmouse, format, ...) \
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dev_notice(&(psmouse)->ps2dev.serio->dev, \
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psmouse_fmt(format), ##__VA_ARGS__)
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#define psmouse_printk(level, psmouse, format, ...) \
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dev_printk(level, \
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&(psmouse)->ps2dev.serio->dev, \
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psmouse_fmt(format), ##__VA_ARGS__)
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#endif /* _PSMOUSE_H */
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