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hmt(4): Add support for serial packet reporting mode

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In Serial mode, each packet contains information that describes a
single physical contact point. Multiple contacts are streamed
serially. In this mode, devices report all contact information in a
series of packets. The device sends a separate packet for each
concurrent contact.

Serial packet reporting mode is used by post-2014 eGalax touchscreens.

Tested by:	Mark Kane <mark_AT_kane_DOT_mn>
MFC after:	2 weeks
This commit is contained in:
Vladimir Kondratyev 2021-09-02 22:31:17 +03:00
parent 744fcd5ad2
commit 0075742d18
1 changed files with 21 additions and 7 deletions
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28
sys/dev/hid/hmt.c
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@ -204,6 +204,8 @@ struct hmt_softc {
uint8_t report_id;
uint32_t max_button;
bool has_int_button;
bool has_cont_count;
bool has_scan_time;
bool is_clickpad;
bool do_timestamps;
#ifdef IICHID_SAMPLING
@ -371,7 +373,8 @@ hmt_attach(device_t dev)
sc->cont_count_max = MAX_MT_SLOTS;
}
if (hid_test_quirk(hw, HQ_MT_TIMESTAMP) || hmt_timestamps)
if (sc->has_scan_time &&
(hid_test_quirk(hw, HQ_MT_TIMESTAMP) || hmt_timestamps))
sc->do_timestamps = true;
#ifdef IICHID_SAMPLING
if (hid_test_quirk(hw, HQ_IICHID_SAMPLING))
@ -438,13 +441,14 @@ hmt_attach(device_t dev)
}
/* Announce information about the touch device */
device_printf(sc->dev, "Multitouch %s with %d external button%s%s\n",
device_printf(sc->dev, "%s %s with %d external button%s%s\n",
sc->cont_count_max > 1 ? "Multitouch" : "Singletouch",
sc->type == HMT_TYPE_TOUCHSCREEN ? "touchscreen" : "touchpad",
nbuttons, nbuttons != 1 ? "s" : "",
sc->is_clickpad ? ", click-pad" : "");
device_printf(sc->dev,
"%d contacts with [%s%s%s%s%s] properties. Report range [%d:%d] - [%d:%d]\n",
(int)sc->cont_count_max,
"%d contact%s with [%s%s%s%s%s] properties. Report range [%d:%d] - [%d:%d]\n",
(int)sc->cont_count_max, sc->cont_count_max != 1 ? "s" : "",
isset(sc->caps, HMT_IN_RANGE) ? "R" : "",
isset(sc->caps, HMT_CONFIDENCE) ? "C" : "",
isset(sc->caps, HMT_WIDTH) ? "W" : "",
@ -513,6 +517,12 @@ hmt_intr(void *context, void *buf, hid_size_t len)
}
/*
* "In Serial mode, each packet contains information that describes a
* single physical contact point. Multiple contacts are streamed
* serially. In this mode, devices report all contact information in a
* series of packets. The device sends a separate packet for each
* concurrent contact."
*
* "In Parallel mode, devices report all contact information in a
* single packet. Each physical contact is represented by a logical
* collection that is embedded in the top-level collection."
@ -521,7 +531,10 @@ hmt_intr(void *context, void *buf, hid_size_t len)
* report with contactid=0 but contactids are zero-based, find
* contactcount first.
*/
cont_count = hid_get_udata(buf, len, &sc->cont_count_loc);
if (sc->has_cont_count)
cont_count = hid_get_udata(buf, len, &sc->cont_count_loc);
else
cont_count = 1;
/*
* "In Hybrid mode, the number of contacts that can be reported in one
* report is less than the maximum number of contacts that the device
@ -753,7 +766,6 @@ hmt_hid_parse(struct hmt_softc *sc, const void *d_ptr, hid_size_t d_len,
sc->cont_count_loc = hi.loc;
break;
}
/* Scan time is required but clobbered by evdev */
if (hi.collevel == 1 && hi.usage ==
HID_USAGE2(HUP_DIGITIZERS, HUD_SCAN_TIME)) {
scan_time_found = true;
@ -804,7 +816,7 @@ hmt_hid_parse(struct hmt_softc *sc, const void *d_ptr, hid_size_t d_len,
hid_end_parse(hd);
/* Check for required HID Usages */
if (!cont_count_found || !scan_time_found || cont == 0)
if ((!cont_count_found && cont != 1) || cont == 0)
return (HMT_TYPE_UNSUPPORTED);
for (i = 0; i < HMT_N_USAGES; i++) {
if (hmt_hid_map[i].required && isclr(sc->caps, i))
@ -842,6 +854,8 @@ hmt_hid_parse(struct hmt_softc *sc, const void *d_ptr, hid_size_t d_len,
sc->cont_count_max = cont_count_max;
sc->nconts_per_report = cont;
sc->has_int_button = has_int_button;
sc->has_cont_count = cont_count_found;
sc->has_scan_time = scan_time_found;
return (type);
}