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HID: wacom: process invalid Cintiq and Intuos data in wacom_intuos_inout() 

Users may use unsupported tools on Cintiq or Intuos. When invalid tools or data
are detected, they should be ignored. That is, no event from those tools should
be reported.

Consolidating that code in wacom_intuos_inout simplifies the logic and make it
easier for future code change.

Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Ping Cheng 2015-01-09 11:04:50 -08:00 committed by Jiri Kosina
parent 61e9e7e40a
commit 373a5356df
1 changed files with 26 additions and 24 deletions
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50
drivers/hid/wacom_wac.c
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@ -534,9 +534,24 @@ static int wacom_intuos_inout(struct wacom_wac *wacom)
return 1;
}
/*
* don't report events for invalid data
*/
/* older I4 styli don't work with new Cintiqs */
if (!((wacom->id[idx] >> 20) & 0x01) &&
(features->type == WACOM_21UX2))
if ((!((wacom->id[idx] >> 20) & 0x01) &&
(features->type == WACOM_21UX2)) ||
/* Only large Intuos support Lense Cursor */
(wacom->tool[idx] == BTN_TOOL_LENS &&
(features->type == INTUOS3 ||
features->type == INTUOS3S ||
features->type == INTUOS4 ||
features->type == INTUOS4S ||
features->type == INTUOS5 ||
features->type == INTUOS5S ||
features->type == INTUOSPM ||
features->type == INTUOSPS)) ||
/* Cintiq doesn't send data when RDY bit isn't set */
(features->type == CINTIQ && !(data[1] & 0x40)))
return 1;
/* Range Report */
@ -553,6 +568,10 @@ static int wacom_intuos_inout(struct wacom_wac *wacom)
if (features->quirks & WACOM_QUIRK_MULTI_INPUT)
wacom->shared->stylus_in_proximity = false;
/* don't report exit if we don't know the ID */
if (!wacom->id[idx])
return 1;
/*
* Reset all states otherwise we lose the initial states
* when in-prox next time
@ -585,6 +604,11 @@ static int wacom_intuos_inout(struct wacom_wac *wacom)
wacom->id[idx] = 0;
return 2;
}
/* don't report other events if we don't know the ID */
if (!wacom->id[idx])
return 1;
return 0;
}
@ -842,28 +866,6 @@ static int wacom_intuos_irq(struct wacom_wac *wacom)
if (result)
return result - 1;
/* don't proceed if we don't know the ID */
if (!wacom->id[idx])
return 0;
/* Only large Intuos support Lense Cursor */
if (wacom->tool[idx] == BTN_TOOL_LENS &&
(features->type == INTUOS3 ||
features->type == INTUOS3S ||
features->type == INTUOS4 ||
features->type == INTUOS4S ||
features->type == INTUOS5 ||
features->type == INTUOS5S ||
features->type == INTUOSPM ||
features->type == INTUOSPS)) {
return 0;
}
/* Cintiq doesn't send data when RDY bit isn't set */
if (features->type == CINTIQ && !(data[1] & 0x40))
return 0;
if (features->type >= INTUOS3S) {
input_report_abs(input, ABS_X, (data[2] << 9) | (data[3] << 1) | ((data[9] >> 1) & 1));
input_report_abs(input, ABS_Y, (data[4] << 9) | (data[5] << 1) | (data[9] & 1));