/* SPDX-License-Identifier: GPL-2.0 */
/*
 * 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 */
};

int hgpk_detect(struct psmouse *psmouse, bool set_properties);
int hgpk_init(struct psmouse *psmouse);

#ifdef CONFIG_MOUSE_PS2_OLPC
void hgpk_module_init(void);
#else
static inline void hgpk_module_init(void)
{
}
#endif

#endif