c0dc834265
The old implementation of spew detection simply tracked the overall position delta of the cursor over every 100 packets. We found that this causes occasional false positives in spew detection, and also that the conditions of the spewy packets are perhaps more fixed than we once thought. Rework the spew detection to look for packets of specific small delta, and only recalibrating if the overall movement delta stays within expected bounds. Also discard duplicate packets in the advanced mode, which appear to be very common. If we don't, the spew detection kicks in far too early. If we get a large spew of duplicates, request a recalibration straight up. Based on earlier work by Paul Fox. Signed-off-by: Daniel Drake <dsd@laptop.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/*
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* OLPC HGPK (XO-1) touchpad PS/2 mouse driver
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*/
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#ifndef _HGPK_H
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#define _HGPK_H
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#define HGPK_GS 0xff /* The GlideSensor */
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#define HGPK_PT 0xcf /* The PenTablet */
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enum hgpk_model_t {
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HGPK_MODEL_PREA = 0x0a, /* pre-B1s */
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HGPK_MODEL_A = 0x14, /* found on B1s, PT disabled in hardware */
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HGPK_MODEL_B = 0x28, /* B2s, has capacitance issues */
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HGPK_MODEL_C = 0x3c,
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HGPK_MODEL_D = 0x50, /* C1, mass production */
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};
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enum hgpk_spew_flag {
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NO_SPEW,
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MAYBE_SPEWING,
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SPEW_DETECTED,
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RECALIBRATING,
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};
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#define SPEW_WATCH_COUNT 42 /* at 12ms/packet, this is 1/2 second */
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enum hgpk_mode {
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HGPK_MODE_MOUSE,
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HGPK_MODE_GLIDESENSOR,
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HGPK_MODE_PENTABLET,
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HGPK_MODE_INVALID
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};
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struct hgpk_data {
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struct psmouse *psmouse;
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enum hgpk_mode mode;
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bool powered;
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enum hgpk_spew_flag spew_flag;
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int spew_count, x_tally, y_tally; /* spew detection */
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unsigned long recalib_window;
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struct delayed_work recalib_wq;
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int abs_x, abs_y;
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int dupe_count;
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};
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#define hgpk_dbg(psmouse, format, arg...) \
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dev_dbg(&(psmouse)->ps2dev.serio->dev, format, ## arg)
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#define hgpk_err(psmouse, format, arg...) \
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dev_err(&(psmouse)->ps2dev.serio->dev, format, ## arg)
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#define hgpk_info(psmouse, format, arg...) \
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dev_info(&(psmouse)->ps2dev.serio->dev, format, ## arg)
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#define hgpk_warn(psmouse, format, arg...) \
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dev_warn(&(psmouse)->ps2dev.serio->dev, format, ## arg)
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#define hgpk_notice(psmouse, format, arg...) \
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dev_notice(&(psmouse)->ps2dev.serio->dev, format, ## arg)
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#ifdef CONFIG_MOUSE_PS2_OLPC
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void hgpk_module_init(void);
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int hgpk_detect(struct psmouse *psmouse, bool set_properties);
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int hgpk_init(struct psmouse *psmouse);
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#else
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static inline void hgpk_module_init(void)
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{
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}
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static inline int hgpk_detect(struct psmouse *psmouse, bool set_properties)
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{
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return -ENODEV;
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}
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static inline int hgpk_init(struct psmouse *psmouse)
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{
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return -ENODEV;
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}
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#endif
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#endif
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