hgpk.h

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/*
 * OLPC HGPK (XO-1) touchpad PS/2 mouse driver
 */

#ifndef _HGPK_H
#define _HGPK_H

#define HGPK_GS     0xff       /* The GlideSensor */
#define HGPK_PT     0xcf       /* The PenTablet */

enum hgpk_model_t {
    HGPK_MODEL_PREA = 0x0a, /* pre-B1s */
    HGPK_MODEL_A = 0x14,    /* found on B1s, PT disabled in hardware */
    HGPK_MODEL_B = 0x28,    /* B2s, has capacitance issues */
    HGPK_MODEL_C = 0x3c,
    HGPK_MODEL_D = 0x50,    /* C1, mass production */
};

enum hgpk_spew_flag {
    NO_SPEW,
    MAYBE_SPEWING,
    SPEW_DETECTED,
    RECALIBRATING,
};

#define SPEW_WATCH_COUNT 42  /* at 12ms/packet, this is 1/2 second */

enum hgpk_mode {
    HGPK_MODE_MOUSE,
    HGPK_MODE_GLIDESENSOR,
    HGPK_MODE_PENTABLET,
    HGPK_MODE_INVALID
};

struct hgpk_data {
    struct psmouse *psmouse;
    enum hgpk_mode mode;
    bool powered;
    enum hgpk_spew_flag spew_flag;
    int spew_count, x_tally, y_tally;   /* spew detection */
    unsigned long recalib_window;
    struct delayed_work recalib_wq;
    int abs_x, abs_y;
    int dupe_count;
    int xbigj, ybigj, xlast, ylast; /* jumpiness detection */
    int xsaw_secondary, ysaw_secondary; /* jumpiness detection */
};

#ifdef CONFIG_MOUSE_PS2_OLPC
void hgpk_module_init(void);
int hgpk_detect(struct psmouse *psmouse, bool set_properties);
int hgpk_init(struct psmouse *psmouse);
#else
static inline void hgpk_module_init(void)
{
}
static inline int hgpk_detect(struct psmouse *psmouse, bool set_properties)
{
    return -ENODEV;
}
static inline int hgpk_init(struct psmouse *psmouse)
{
    return -ENODEV;
}
#endif

#endif