user/sven/linux.git/drivers/input/mouse/psmouse-base.c, branch v4.14.219

Input: psmouse - add a newline when printing 'proto' by sysfs

2020-08-26T08:29:56Z

[ Upstream commit 4aec14de3a15cf9789a0e19c847f164776f49473 ] When I cat parameter 'proto' by sysfs, it displays as follows. It's better to add a newline for easy reading. root@syzkaller:~# cat /sys/module/psmouse/parameters/proto autoroot@syzkaller:~# Signed-off-by: Xiongfeng Wang Link: https://lore.kernel.org/r/20200720073846.120724-1-wangxiongfeng2@huawei.com Signed-off-by: Dmitry Torokhov Signed-off-by: Sasha Levin

Input: psmouse - fix Synaptics detection when protocol is disabled

2018-04-26T09:02:05Z

[ Upstream commit 2bc4298f59d2f15175bb568e2d356b5912d0cdd9 ] When Synaptics protocol is disabled, we still need to try and detect the hardware, so we can switch to SMBus device if SMbus is detected, or we know that it is Synaptics device and reset it properly for the bare PS/2 protocol. Fixes: c378b5119eb0 ("Input: psmouse - factor out common protocol probing code") Reported-by: Matteo Croce Tested-by: Matteo Croce Signed-off-by: Dmitry Torokhov Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

Input: psmouse - constify attribute_group structures

2017-07-12T21:19:29Z

attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by work with const attribute_group. So mark the non-const structs as const. File size before: text data bss dec hex filename 12850 740 12 13602 3522 drivers/input/mouse/psmouse-base.o File size After adding 'const': text data bss dec hex filename 12914 676 12 13602 3522 drivers/input/mouse/psmouse-base.o Signed-off-by: Arvind Yadav Signed-off-by: Dmitry Torokhov

Input: synaptics - add support for Intertouch devices

2017-03-25T17:37:30Z

Most of the Synaptics devices are connected through PS/2 and a different bus (SMBus or HID over I2C). The secondary bus capability is indicated by the InterTouch bit in extended capability 0x0C. We only enable the InterTouch device to be created for the laptops registered with the top software button property or those we know that are functional. In the future, we might change the default to always rely on the InterTouch bus. Currently, users can enable/disable the feature with the psmouse parameter synaptics_intertouch. Signed-off-by: Benjamin Tissoires Signed-off-by: Dmitry Torokhov

Input: psmouse - add support for SMBus companions

2017-03-25T17:37:29Z

This provides glue between PS/2 devices that enumerate the RMI4 devices and Elan touchpads to the RMI4 (or Elan) SMBus driver. The SMBus devices keep their PS/2 connection alive. If the initialization process goes too far (psmouse_activate called), the device disconnects from the I2C bus and stays on the PS/2 bus, that is why we explicitly disable PS/2 device reporting (by calling psmouse_deactivate) before trying to register SMBus companion device. The HID over I2C devices are enumerated through the ACPI DSDT, and their PS/2 device also exports the InterTouch bit in the extended capability 0x0C. However, the firmware keeps its I2C connection open even after going further in the PS/2 initialization. We don't need to take extra precautions with those device, especially because they block their PS/2 communication when HID over I2C is used. Signed-off-by: Benjamin Tissoires Signed-off-by: Dmitry Torokhov

Input: psmouse - introduce notion of SMBus companions

2017-03-25T17:37:28Z

Prepare PS/2 mouse drivers to work with devices that are accessible both via PS/2 and SMBus, which provides higher bandwidth, and thus suits better for modern multi-touch devices. We expect that SMBus drivers will take control over the device, so when we detect SMBus "protocol" we forego registering input device, or enabling PS/2 device reports (as it usually makes device unresponsive to access over SMBus). Reviewed-by: Benjamin Tissoires Signed-off-by: Dmitry Torokhov

Input: psmouse - store pointer to current protocol

2017-03-25T17:37:27Z

Instead of storing only protocol "type" in pmsouse structure, store pointer to the protocol structure, so that we have access to more data without having to copy it over to psmouse structure. Reviewed-by: Benjamin Tissoires Signed-off-by: Dmitry Torokhov

Input: psmouse - implement fast reconnect option

2017-03-25T17:37:27Z

Make use of serio's fast reconnect option and allow psmouse protocol handler's to implement fast reconnect handlers that will be called during system resume. Reviewed-by: Benjamin Tissoires Signed-off-by: Dmitry Torokhov

Input: psmouse - add a custom serio protocol to send extra information

2017-02-09T19:43:15Z

The tracksticks on the Lenovo thinkpads have their buttons connected through the touchpad device. We already fixed that in synaptics.c, but when we switch the device into RMI4 mode to have proper support, the pass-through functionality can't deal with them easily. We add a new PS/2 flag and protocol designed for psmouse. The RMI4 F03 pass-through can then emit a special set of commands to notify psmouse the state of the buttons. This patch implements the protocol in psmouse, while an other will do the same for rmi4-f03. Signed-off-by: Benjamin Tissoires Signed-off-by: Dmitry Torokhov

Input: psmouse - disable automatic probing of BYD touchpads

2016-11-17T01:25:31Z

BYD automatic protocol detection is extremely unreliable and is often triggers false positives on regular mice, Sentelic touchpads, and other devices. BYD has several documents that have recommended detection sequence, but they conflict with each other and, as far as I can see, still would not produce unique enough output to reliably differentiate BYD from other PS/2 devices. OEMs sourcing BYD devices also do not do us any favors by not supplying any reasonable DMI data and instead leaving turds like "To Be Filled By O.E.M." in place of vendor data, or "System Serial Number" as serial number. On top of that BYD is not truly modern multitouch controller, but rather a single-touch transitional device that only reports absolute coordinates at the beginning of finger contact and then reverts to reporting displacements, and thus not very precise; the only benefit from using BYD mode vs the legacy PS/2 mode is possibility of edge scrolling. Given the above, and the fact that BYD devices are somewhat uncommon, let's disable automatic detection of BYD devices. Users who know they have BYD trackpads or want to experiment can attempt to activate BYD protocol via sysfs: echo -n "byd" > /sys/bus/serio/devices/serio1/drvctl Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=151691 Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=175421 Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=120781 Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=121281 Fixes: 98ee37714493 ("Input: byd - add BYD PS/2 touchpad driver") Cc: stable@vger.kernel.org # 4.6+ Reviewed-by: Pali Rohár Signed-off-by: Dmitry Torokhov