linux/drivers/input/mouse/hgpk.h
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * OLPC HGPK (XO-1) touchpad PS/2 mouse driver
   4 */
   5
   6#ifndef _HGPK_H
   7#define _HGPK_H
   8
   9#define HGPK_GS         0xff       /* The GlideSensor */
  10#define HGPK_PT         0xcf       /* The PenTablet */
  11
  12enum hgpk_model_t {
  13        HGPK_MODEL_PREA = 0x0a, /* pre-B1s */
  14        HGPK_MODEL_A = 0x14,    /* found on B1s, PT disabled in hardware */
  15        HGPK_MODEL_B = 0x28,    /* B2s, has capacitance issues */
  16        HGPK_MODEL_C = 0x3c,
  17        HGPK_MODEL_D = 0x50,    /* C1, mass production */
  18};
  19
  20enum hgpk_spew_flag {
  21        NO_SPEW,
  22        MAYBE_SPEWING,
  23        SPEW_DETECTED,
  24        RECALIBRATING,
  25};
  26
  27#define SPEW_WATCH_COUNT 42  /* at 12ms/packet, this is 1/2 second */
  28
  29enum hgpk_mode {
  30        HGPK_MODE_MOUSE,
  31        HGPK_MODE_GLIDESENSOR,
  32        HGPK_MODE_PENTABLET,
  33        HGPK_MODE_INVALID
  34};
  35
  36struct hgpk_data {
  37        struct psmouse *psmouse;
  38        enum hgpk_mode mode;
  39        bool powered;
  40        enum hgpk_spew_flag spew_flag;
  41        int spew_count, x_tally, y_tally;       /* spew detection */
  42        unsigned long recalib_window;
  43        struct delayed_work recalib_wq;
  44        int abs_x, abs_y;
  45        int dupe_count;
  46        int xbigj, ybigj, xlast, ylast; /* jumpiness detection */
  47        int xsaw_secondary, ysaw_secondary; /* jumpiness detection */
  48};
  49
  50int hgpk_detect(struct psmouse *psmouse, bool set_properties);
  51int hgpk_init(struct psmouse *psmouse);
  52
  53#ifdef CONFIG_MOUSE_PS2_OLPC
  54void hgpk_module_init(void);
  55#else
  56static inline void hgpk_module_init(void)
  57{
  58}
  59#endif
  60
  61#endif
  62