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Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over
'---help---'"), the number of '---help---' has been gradually
decreasing, but there are still more than 2400 instances.
This commit finishes the conversion. While I touched the lines,
I also fixed the indentation.
There are a variety of indentation styles found.
a) 4 spaces + '---help---'
b) 7 spaces + '---help---'
c) 8 spaces + '---help---'
d) 1 space + 1 tab + '---help---'
e) 1 tab + '---help---' (correct indentation)
f) 1 tab + 1 space + '---help---'
g) 1 tab + 2 spaces + '---help---'
In order to convert all of them to 1 tab + 'help', I ran the
following commend:
$ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/'
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input updates from Dmitry Torokhov:
- a new driver for the Azoteq IQS269A capacitive touch controller
- a new driver for the Cypress CY8CTMA140 touchscreen
- updates to Elan and ft5x06 touchscreen drivers
- assorted driver fixes
- msm-vibrator has been removed as we have a more generic solution
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (28 commits)
Input: adi - work around module name confict
Input: iqs269a - add missing I2C dependency
Input: elants - refactor elants_i2c_execute_command()
Input: elants - override touchscreen info with DT properties
Input: elants - remove unused axes
Input: add support for Azoteq IQS269A
dt-bindings: input: Add bindings for Azoteq IQS269A
Input: imx_sc_key - use devm_add_action_or_reset() to handle all cleanups
Input: remove msm-vibrator driver
dt-bindings: Input: remove msm-vibrator
Input: elants_i2c - provide an attribute to show calibration count
Input: introduce input_mt_report_slot_inactive()
dt-bindings: input: touchscreen: elants_i2c: convert to YAML
Input: add driver for the Cypress CY8CTMA140 touchscreen
dt-bindings: touchscreen: Add CY8CTMA140 bindings
Input: edt-ft5x06 - prefer asynchronous probe
Input: edt-ft5x06 - improve power management operations
Input: edt-ft5x06 - move parameter restore into helper
Input: edt-ft5x06 - fix get_default register write access
Input: atkbd - receive and use physcode->keycode mapping from FW
...
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input_mt_report_slot_state() ignores "tool" argument when the slot is
closed, which has caused a bit of confusion. Let's introduce
input_mt_report_slot_inactive() to report inactive slot state.
Suggested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Link: https://lore.kernel.org/r/20200508055656.96389-2-jiada_wang@mentor.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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'for-5.8/core', 'for-5.8/intel-ish', 'for-5.8/logitech', 'for-5.8/mcp2221' and 'for-5.8/multitouch' into for-linus
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After commit c23e2043d5f7 ("HID: multitouch: do not filter mice nodes"),
MT_CLS_WIN_8 also supports mouse nodes, hence make MT_CLS_WIN_8_DUAL
redundant.
Remove MT_CLS_WIN_8_DUAL accordingly.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
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Two touchpad/trackstick combos are currently not behaving properly.
They define a mouse emulation collection, as per Win8 requirements,
but also define a separate mouse collection for the trackstick.
The way the kernel currently treat the collections is that it
merges both in one device. However, given that the first mouse
collection already defines X,Y and left, right buttons, when
mapping the events from the second mouse collection, hid-multitouch
sees that these events are already mapped, and simply ignores them.
To be able to report events from the tracktick, add a new quirked
class for it, and manually add the 2 devices we know about.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=207235
Cc: stable@vger.kernel.org
Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
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MCP2221 has 4 pins that can be used as GPIO or configured
for alternate functionality such as clock generation and
IRQ detection. This patch adds support for GPIO functionality.
To set direction of a pin or to toggle its state after it
has been configured as GPIO, driver sends command to mcp2221
and parses response received from mcp2221. Based on this
response either 0 or appropriate error code is returned to
GPIO framework.
To get the direction or current state of a pin, driver
sends command and read response from the device. Based on
the response received from device direction or value
is sent to the GPIO framework.
Command from driver to mcp2221 device are output report.
Response received from mcp2221 is input report.
Datasheet (page 45-48) contains details about how to decode
the response received from device:
http://ww1.microchip.com/downloads/en/DeviceDoc/20005565B.pdf
Signed-off-by: Rishi Gupta <gupt21@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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The hid-logitech-{dj,hidpp} were originally developed for unifying
receivers but since then they have evolved and now support other types
of receivers and devices. This patch adjusts the original descriptions
with this in mind.
Signed-off-by: Filipe Laíns <lains@archlinux.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Older compilers like gcc-4.8 don't see that the variable is
initialized when it is used:
In file included from include/linux/compiler_types.h:68:0,
from <command-line>:0:
drivers/hid/intel-ish-hid/ishtp-fw-loader.c: In function 'load_fw_from_host':
include/linux/compiler-gcc.h:75:45: warning: 'fw_info.ldr_capability.max_dma_buf_size' may be used uninitialized in this function [-Wmaybe-uninitialized]
#define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
^
drivers/hid/intel-ish-hid/ishtp-fw-loader.c:770:22: note: 'fw_info.ldr_capability.max_dma_buf_size' was declared here
struct shim_fw_info fw_info;
^
Make sure to initialize it before returning an error from ish_query_loader_prop().
Fixes: 91b228107da3 ("HID: intel-ish-hid: ISH firmware loader client driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Fix 2 typos:
s/Uninterruptable/Uninterruptible/
s/should't/shouldn't/
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Since commit 4bc43a421218 ("HID: asus: Add
hid_is_using_ll_driver(usb_hid_driver) check") the hid-asus.c depends
on the usb_hid_driver symbol. Add a depends on USB_HID to Kconfig to
fix missing symbols errors in hid-asus when USB_HID is not enabled.
Fixes: 4bc43a421218 ("HID: asus: Add hid_is_using_ll_driver(usb_hid_driver) check")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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The mute key, is broken. All the consumer keys on the keyboard USB
interface work normally, except for mute which only sends press events
and never sends release events.
The touchpad key sends the otherwise unused input report with a report-id
of 5 on the touchpad interface. It too only sends press events. This also
requires extra special handling since the multi-touch touchpad events and
the KEY_F21 events for the touchpad toggle must not be send from the same
input_dev (userspace cannot handle this).
This commit adds special handlig for both, fixing these keys not working.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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The multi-touch touchpad found on the Medion Akoya E1239T's keyboard-dock,
uses the same custom multi-touch protocol as the Asus keyboard-docks
(same chipset vendor, Integrated Technology Express / ITE).
Add support for this using the existing multi-touch touchpad support in
the hid-asus driver.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Add the report_size to struct asus_touchpad_info instead of calculating it.
This is a preparation patch for adding support for the multi-touch touchpad
found on the Medion Akoya E1239T's keyboard-dock, which uses the same
custom multi-touch protocol as the Asus keyboard-docks (same chipset
vendor, Integrated Technology Express / ITE).
The only difference in that the Akoya E1239T keyboard-dock's input-reports
have a 5 byte footer instead of a 1 byte footer, which requires the
report_size to be configurable per touchpad-model.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Add a hid_is_using_ll_driver(usb_hid_driver) check to ensure that the
parent device is an usb_interface, before casting the parent device
pointer to an usb_interface pointer with to_usb_interface().
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Before this commit the code was trying to keep the mapping for the
left mouse-button, do avoid the hidinput_has_been_populated() check
in hid-input.c from triggering and causing the touchpad input_dev ro
get cleaned up.
But the hidinput_has_been_populated() check happens after the
input_configured callback which sets up all the input bit for the
touchpad, so there is no need to preserve the left button mapping.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Make asus_input_mapping() only set EV_REP if we are adding a mapping.
The T100CHI bluetooth keyboard dock has a few input reports for which
we do not create any mappings (these input-reports are present in the
descriptors but never send).
The hid-asus code relies on the HID core not creating input devices for
input-reports without any mappings. But the present of the EV_REP but
counts as a mapping causing 6 /dev/input/event# nodes to be created for
the T100CHI bluetooth keyboard dock. This change brings the amount of
created /dev/input/event# nodes / input-devices down to 4.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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This patch allows users to swap the Fn and left Control keys on all Apple
keyboards: internal (e.g. Macbooks) and external (both wired and wireless).
The patch adds a new hid-apple module param: swap_fn_leftctrl (off by default).
Signed-off-by: Zakhar Semenov <mail@free5lot.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Fix for non-working buttons on knock-off USB dongles for Sony
controllers. These USB dongles are used to connect older Sony DA/DS1/DS2
controllers via USB and are common on Amazon, AliExpress, etc. Without
the patch, the square, X, and circle buttons do not function. These
dongles used to work prior to kernel 4.10 but removing the global DS3
report fixup in commit e19a267b9987 ("HID: sony: DS3 comply to Linux gamepad
spec") exposed the problem.
Many people reported the problem on the Ubuntu forums and are working
around the problem by falling back to the 4.9 hid-sony driver.
The problem stems from these dongles incorrectly reporting their button
count as 13 instead of 16. This patch fixes up the report descriptor by
changing the button report count to 16 and removing 3 padding bits.
Cc: stable@vger.kernel.org
Fixes: e19a267b9987 ("HID: sony: DS3 comply to Linux gamepad spec")
Signed-off-by: Scott Shumate <scott.shumate@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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The Trust Panora Graphic Tablet has two interfaces. Interface zero reports pen
movement, pen pressure and pen buttons. Interface one reports tablet buttons
and tablet scroll. Both use the mouse protocol.
Without these quirks, libinput gets confused about what device it talks to.
For completeness, here is the usbhid-dump:
```
$ sudo usbhid-dump -d 145f:0212
003:013:001:DESCRIPTOR 1588949402.559961
05 0D 09 01 A1 01 85 07 A1 02 09 00 75 08 95 07
81 02 C0 C0 09 0E A1 01 85 05 09 23 A1 02 09 52
09 53 25 0A 75 08 95 02 B1 02 C0 C0 05 0C 09 36
A1 00 85 06 05 09 19 01 29 20 15 00 25 01 95 20
75 01 81 02 C0
003:013:000:DESCRIPTOR 1588949402.563942
05 01 09 02 A1 01 85 08 09 01 A1 00 05 09 19 01
29 03 15 00 25 01 95 03 75 01 81 02 95 05 81 01
05 01 09 30 09 31 09 38 09 00 15 81 25 7F 75 08
95 04 81 06 C0 C0 05 01 09 02 A1 01 85 09 09 01
A1 00 05 09 19 01 29 03 15 00 25 01 95 03 75 01
81 02 95 05 81 01 05 01 09 30 09 31 26 FF 7F 95
02 75 10 81 02 05 0D 09 30 26 FF 03 95 01 75 10
81 02 C0 C0 05 01 09 00 A1 01 85 04 A1 00 26 FF
00 09 00 75 08 95 07 B1 02 C0 C0
```
Signed-off-by: Cristian Klein <cristian.klein@elastisys.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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This device uses the SIPODEV SP1064 touchpad, which does not
supply descriptors, so it has to be added to the override list.
Cc: stable@vger.kernel.org
Signed-off-by: Julian Sax <jsbc@gmx.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Add a HID_QUIRK_NO_INIT_REPORTS quirk for the Dell K12A keyboard-dock,
which can be used with various Dell Venue 11 models.
Without this quirk the keyboard/touchpad combo works fine when connected
at boot, but when hotplugged 9 out of 10 times it will not work properly.
Adding the quirk fixes this.
Cc: Mario Limonciello <mario.limonciello@dell.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Without gpiolib, this driver fails to link:
arm-linux-gnueabi-ld: drivers/hid/hid-mcp2221.o: in function `mcp2221_probe':
hid-mcp2221.c:(.text+0x1b0): undefined reference to `devm_gpiochip_add_data'
arm-linux-gnueabi-ld: drivers/hid/hid-mcp2221.o: in function `mcp_gpio_get':
hid-mcp2221.c:(.text+0x30c): undefined reference to `gpiochip_get_data'
Fixes: 328de1c519c5 ("HID: mcp2221: add GPIO functionality support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Rishi Gupta <gupt21@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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On the Dell XPS 9570, the Synaptics SYNA2393 touchpad generates spurious
interrupts after resuming from suspend until it receives some input or
is reset. Add it to the quirk I2C_HID_QUIRK_RESET_ON_RESUME so that it
is reset when resuming from suspend.
More information about the bug can be found in this mailing list
discussion: https://www.spinics.net/lists/linux-input/msg59530.html
Signed-off-by: Daniel Playfair Cal <daniel.playfair.cal@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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The state of the center button was not reported to userspace for the
2nd-gen Intuos Pro S when used over Bluetooth due to the pad handling
code not being updated to support its reduced number of buttons. This
patch uses the actual number of buttons present on the tablet to
assemble a button state bitmap.
Link: https://github.com/linuxwacom/xf86-input-wacom/issues/112
Fixes: cd47de45b855 ("HID: wacom: Add 2nd gen Intuos Pro Small support")
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Cc: stable@vger.kernel.org # v5.3+
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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The syzbot fuzzer discovered a bad race between in the usbhid driver
between usbhid_stop() and usbhid_close(). In particular,
usbhid_stop() does:
usb_free_urb(usbhid->urbin);
...
usbhid->urbin = NULL; /* don't mess up next start */
and usbhid_close() does:
usb_kill_urb(usbhid->urbin);
with no mutual exclusion. If the two routines happen to run
concurrently so that usb_kill_urb() is called in between the
usb_free_urb() and the NULL assignment, it will access the
deallocated urb structure -- a use-after-free bug.
This patch adds a mutex to the usbhid private structure and uses it to
enforce mutual exclusion of the usbhid_start(), usbhid_stop(),
usbhid_open() and usbhid_close() callbacks.
Reported-and-tested-by: syzbot+7bf5a7b0f0a1f9446f4c@syzkaller.appspotmail.com
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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collection basis"
This reverts commit 15893fa40109f5e7c67eeb8da62267d0fdf0be9d.
The referenced commit broke pen and touch input for a variety of devices
such as the Cintiq Pro 32. Affected devices may appear to work normally
for a short amount of time, but eventually loose track of actual touch
state and can leave touch arbitration enabled which prevents the pen
from working. The commit is not itself required for any currently-available
Bluetooth device, and so we revert it to correct the behavior of broken
devices.
This breakage occurs due to a mismatch between the order of collections
and the order of usages on some devices. This commit tries to read the
contact count before processing events, but will fail if the contact
count does not occur prior to the first logical finger collection. This
is the case for devices like the Cintiq Pro 32 which place the contact
count at the very end of the report.
Without the contact count set, touches will only be partially processed.
The `wacom_wac_finger_slot` function will not open any slots since the
number of contacts seen is greater than the expectation of 0, but we will
still end up calling `input_mt_sync_frame` for each finger anyway. This
can cause problems for userspace separate from the issue currently taking
place in the kernel. Only once all of the individual finger collections
have been processed do we finally get to the enclosing collection which
contains the contact count. The value ends up being used for the *next*
report, however.
This delayed use of the contact count can cause the driver to loose track
of the actual touch state and believe that there are contacts down when
there aren't. This leaves touch arbitration enabled and prevents the pen
from working. It can also cause userspace to incorrectly treat single-
finger input as gestures.
Link: https://github.com/linuxwacom/input-wacom/issues/146
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Reviewed-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com>
Fixes: 15893fa40109 ("HID: wacom: generic: read the number of expected touches on a per collection basis")
Cc: stable@vger.kernel.org # 5.3+
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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HID_DEVICE_ID_ALPS_1657 PID is too specific, as there are many other
ALPS hardware IDs using this particular touchpad.
Rename the identifier to HID_DEVICE_ID_ALPS_U1_UNICORN_LEGACY in order
to describe reality better.
Fixes: 640e403b1fd24 ("HID: alps: Add AUI1657 device ID")
Reported-by: Xiaojian Cao <xiaojian.cao@cn.alps.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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This device is used on Lenovo V130-15IKB variants and uses
the same registers as U1.
Signed-off-by: Artem Borisov <dedsa2002@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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The Logitech G11 keyboard is a cheap variant of the G15 without the LCD
screen. It uses the same layout for its extra and macro keys (G1 - G18,
M1-M3, MR) and - from the input subsystem's perspective - behaves just
like the G15, so we can treat it as such.
Tested it with my own keyboard.
Signed-off-by: Fabian Schindlatz <fabian.schindlatz@fau.de>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Add support for P80H84 touchscreen from eGalaxy:
idVendor 0x0eef D-WAV Scientific Co., Ltd
idProduct 0xc002
iManufacturer 1 eGalax Inc.
iProduct 2 eGalaxTouch P80H84 2019 vDIVA_1204_T01 k4.02.146
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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We've recently switched from extracting the value of HID_DG_CONTACTMAX
at a fixed offset (which may not be correct for all tablets) to
injecting the report into the driver for the generic codepath to handle.
Unfortunately, this change was made for *all* tablets, even those which
aren't generic. Because `wacom_wac_report` ignores reports from non-
generic devices, the contact count never gets initialized. Ultimately
this results in the touch device itself failing to probe, and thus the
loss of touch input.
This commit adds back the fixed-offset extraction for non-generic devices.
Link: https://github.com/linuxwacom/input-wacom/issues/155
Fixes: 184eccd40389 ("HID: wacom: generic: read HID_DG_CONTACTMAX from any feature report")
Signed-off-by: Jason Gerecke <jason.gerecke@wacom.com>
Reviewed-by: Aaron Armstrong Skomra <aaron.skomra@wacom.com>
CC: stable@vger.kernel.org # 5.3+
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid
Pull HID updates from Jiri Kosina:
- Logitech HID++ protocol support improvement from Filipe Laíns
- probe fix for Logitech-G* devices from Hans de Goede
- a few other small code cleanups and support for new device IDs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
HID: rmi: Simplify an error handling path in 'rmi_hid_read_block()'
HID: intel-ish-hid: hbm.h: Replace zero-length array with flexible-array member
HID: intel-ish-hid: ishtp-dev.h: Replace zero-length array with flexible-array member
HID: Add driver fixing Glorious PC Gaming Race mouse report descriptor
HID: lg-g15: Do not fail the probe when we fail to disable F# emulation
HID: appleir: Use devm_kzalloc() instead of kzalloc()
HID: appleir: Remove unnecessary goto label
HID: logitech-dj: add support for the static device in the Powerplay mat/receiver
HID: mcp2221: add usb to i2c-smbus host bridge
HID: logitech-dj: add debug msg when exporting a HID++ report descriptors
HID: quirks: Remove ITE 8595 entry from hid_have_special_driver
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MCP2221 is a USB HID to I2C/SMbus host bridge device. This
commit implements i2c and smbus host adapter support. 7-bit
address and i2c multi-message transaction is also supported.
Signed-off-by: Rishi Gupta <gupt21@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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- Logitech HID++ protocol support improvement from Filipe Laíns
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mat/receiver
The Logitech G Powerplay has a lightspeed receiver with a static HID++
device with ID 7 attached to it to. It is used to configure the led on
the mat. For this reason I increased the max number of devices.
Signed-off-by: Filipe Laíns <lains@archlinux.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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When exporting all other types of report descriptors we print a debug
message. Not doing so for HID++ descriptors makes unaware users think
that no HID++ descriptor was exported.
Signed-off-by: Filipe Laíns <lains@archlinux.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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- C99 code purification in intel-ish-hid from Gustavo A. R. Silva
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The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by
this change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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flexible-array member
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:
struct foo {
int stuff;
struct boo array[];
};
By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.
Also, notice that, dynamic memory allocations won't be affected by
this change:
"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]
This issue was found with the help of Coccinelle.
[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 76497732932f ("cxgb3/l2t: Fix undefined behaviour")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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- report descriptor fix for Glorious PC Gaming Race device from Samuel Čavoj
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The Glorious Model O mice (and also at least the Model O-, which is
driver-wise the same mouse) have a bug in the descriptor of HID
Report with ID 2. This report is used for Consumer Control buttons,
which can be mapped using the provided Windows only software.
Here is an excerpt from the original descriptor:
INPUT(2)[INPUT]
Field(0)
Flags( Constant Variable Absolute )
Field(1)
Flags( Constant Variable Absolute )
Field(2)
Flags( Constant Variable Absolute )
The issue is the Constant flag specified on all 3 fields, which
causes the hid driver to ignore changes in these fields and
essentialy causes the buttons to not work at all. The submitted driver
patches the descriptor to end up with the following:
INPUT(2)[INPUT]
Field(0)
Flags( Variable Relative )
Field(1)
Flags( Variable Relative )
Field(2)
Flags( Variable Relative )
The Constant bit is reset and the Relative bit has been set in
order to prevent repeat events when holding down the button.
Additionally, the device name is changed from the hardware-reported
"SINOWEALTH Wired Gaming Mouse" to "Glorious Model O" or "Glorious
Model D".
Signed-off-by: Samuel Čavoj <sammko@sammserver.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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- device-specific (ITE 8595) fix from Hans de Goede
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The ITE 8595 chip used in various 2-in-1 keyboard docks works fine with
the hid-generic driver (minus the RF_KILL key) and also keeps working fine
when swapping drivers, so there is no need to have it in the
hid_have_special_driver list.
Note the other 2 USB ids in hid-ite.c were never added to
hid_have_special_driver.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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- small code cleanups in hid-appleir from Lucas Tanure
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Signed-off-by: Lucas Tanure <tanure@linux.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Signed-off-by: Lucas Tanure <tanure@linux.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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The 'RMI_READ_REQUEST_PENDING' bit is already cleared in the error handling
path. There is no need to reset it twice.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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By default the G1-G12 keys on the Logitech gaming keyboards send
F1 - F12 when in "generic HID" mode.
The first thing the hid-lg-g15 driver does is disable this behavior.
We have received a bugreport that this does not work when the keyboard
is connected through an Aten KVM switch. Using a gaming keyboard with
a KVM is a bit weird setup, but still we can try to fail a bit more
gracefully here.
On the G510 keyboards the same USB-interface which is used for the gaming
keys is also used for the media-keys. Before this commit we would call
hid_hw_stop() on failure to disable the F# emulation and then exit the
probe method with an error code.
This not only causes us to not handle the gaming-keys, but this also
breaks the media keys which is a regression compared to the situation
when these keyboards where handled by the generic hidinput driver.
This commit changes the error handling to clear the hiddev drvdata
(to disable our .raw_event handler) and then returning from the probe
method with success.
The net result of this is that, when connected through a KVM, things
work as well as they did before the hid-lg-g15 driver was introduced.
Fixes: ad4203f5a243 ("HID: lg-g15: Add support for the G510 keyboards' gaming keys")
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1806321
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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