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* HID: Fix assumption that devices have inputsAlan Stern2019-10-031-2/+9
| | | | | | | | | | | | | | | | | The syzbot fuzzer found a slab-out-of-bounds write bug in the hid-gaff driver. The problem is caused by the driver's assumption that the device must have an input report. While this will be true for all normal HID input devices, a suitably malicious device can violate the assumption. The same assumption is present in over a dozen other HID drivers. This patch fixes them by checking that the list of hid_inputs for the hid_device is nonempty before allowing it to be used. Reported-and-tested-by: syzbot+403741a091bf41d4ae79@syzkaller.appspotmail.com Signed-off-by: Alan Stern <stern@rowland.harvard.edu> CC: <stable@vger.kernel.org> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
* HID: logitech: Fix general protection fault caused by Logitech driverAlan Stern2019-08-221-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The syzbot fuzzer found a general protection fault in the HID subsystem: kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 0 PID: 3715 Comm: syz-executor.3 Not tainted 5.2.0-rc6+ #15 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__pm_runtime_resume+0x49/0x180 drivers/base/power/runtime.c:1069 Code: ed 74 d5 fe 45 85 ed 0f 85 9a 00 00 00 e8 6f 73 d5 fe 48 8d bd c1 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 fe 00 00 00 RSP: 0018:ffff8881d99d78e0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000020 RCX: ffffc90003f3f000 RDX: 0000000416d8686d RSI: ffffffff82676841 RDI: 00000020b6c3436a RBP: 00000020b6c340a9 R08: ffff8881c6d64800 R09: fffffbfff0e84c25 R10: ffff8881d99d7940 R11: ffffffff87426127 R12: 0000000000000004 R13: 0000000000000000 R14: ffff8881d9b94000 R15: ffffffff897f9048 FS: 00007f047f542700(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30f21000 CR3: 00000001ca032000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: pm_runtime_get_sync include/linux/pm_runtime.h:226 [inline] usb_autopm_get_interface+0x1b/0x50 drivers/usb/core/driver.c:1707 usbhid_power+0x7c/0xe0 drivers/hid/usbhid/hid-core.c:1234 hid_hw_power include/linux/hid.h:1038 [inline] hidraw_open+0x20d/0x740 drivers/hid/hidraw.c:282 chrdev_open+0x219/0x5c0 fs/char_dev.c:413 do_dentry_open+0x497/0x1040 fs/open.c:778 do_last fs/namei.c:3416 [inline] path_openat+0x1430/0x3ff0 fs/namei.c:3533 do_filp_open+0x1a1/0x280 fs/namei.c:3563 do_sys_open+0x3c0/0x580 fs/open.c:1070 do_syscall_64+0xb7/0x560 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe It turns out the fault was caused by a bug in the HID Logitech driver, which violates the requirement that every pathway calling hid_hw_start() must also call hid_hw_stop(). This patch fixes the bug by making sure the requirement is met. Reported-and-tested-by: syzbot+3cbe5cd105d2ad56a1df@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>
* treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156Thomas Gleixner2019-05-301-13/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* HID: fix Logitech WingMan Formula GP joined axesJarrad Whitaker2019-02-141-0/+6
| | | | | | | | | | The Logitech WingMan Formula GP by default presents a combined accelerate/brake axis, so this patch assigns it to hid-logitech in order to benefit from the axis-splitting logic in lg4ff. There is also a fixed report descriptor for the resulting report. Signed-off-by: Jarrad Whitaker <jarrad.whitaker@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-logitech: remove redundant assignment to pointer valueColin Ian King2017-10-191-3/+1
| | | | | | | | | | | The pointer value is being assigned a value and this is never read, and later on it is being assigned a new value. This the first assignment is redundant and can be removed and hence also the variables report and report_list. Cleans up the clang warning: Value stored to 'value' during its initialization is never read Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-logitech: Improve Wingman Formula Force GP supportSimon Wood2016-09-261-0/+2
| | | | | | | | | Move ForceFeedback support for the Formula Force GP into hid-lgff4 and re-write HID descriptor, thus allowing combined pedals or not as user desires. Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-logitech: Compute combined pedals valueSimon Wood2016-09-261-0/+17
| | | | | | | | | | Add support for computing a combined accelerator/brake axis for wheels which don't contain combined data in their HID stream. This includes DFGT, G25, G27, G29 and Wii-Wheel. Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-logitech: Add combined pedal support Logitech wheelsSimon Wood2016-09-261-0/+32
| | | | | | | | | | Add support for reporting a combined accelerator/brake axis for wheels which contain combined data in their HID stream. This includes DF, MOMO, MOMO2 and DFP. Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-logitech: Introduce control for combined pedals featureSimon Wood2016-09-261-0/+58
| | | | | | | | | Introduce a dev_attr which can be used to combine the accelerator and brake pedals into a single axis. This is useful for older games which can not handle seperate accelerator and brake. Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: use to_hid_device()Geliang Tang2015-12-281-2/+2
| | | | | | | Use to_hid_device() instead of container_of(). Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: move to_hid_device() to hid.hGeliang Tang2015-12-281-2/+0
| | | | | | | | to_hid_device() macro is defined in both hid-lg4ff.c and hid-logitech-hidpp.c. So I move it to include/linux/hid.h. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: logitech: Add support for G29Simon Wood2015-11-061-4/+53
| | | | | | | | | | | At present the G29 is mis-identified as a DFGT, this patch ensures that the wheel is correctly detected and allows setting the LEDs and turning range via the '/sys' interface. This wheel can also emulate other types of Logitech wheels. Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: logitech: Simplify wheel detection schemeSimon Wood2015-11-061-42/+28
| | | | | | | | Simplfy how hid-logitech driver detects the native mode of the wheel, done by looking at the USB-ID revision and comparing bit mask. Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Allow the driver to continue without sysfs interfaceMichal Malý2015-05-071-4/+3
| | | | | | | | Allow the driver to continue without sysfs interface. Instead of bailing out allow the driver to continue in a degraded mode. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Constify members of lg4ff_device_entryMichal Malý2015-05-071-15/+39
| | | | | | | | Constify those members of lg4ff_device_entry struct whose value is not supposed to change. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Store pointer to the output HID report struct in the device ↵Michal Malý2015-05-071-35/+32
| | | | | | | | | | entry struct Store pointer to the output HID report struct in the device entry struct. This eliminates the need to look the HID report struct up every time it is needed. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Protect concurrent access to output HID reportMichal Malý2015-05-071-0/+110
| | | | | | | | | | | Protect concurrent access to output HID report with a spinlock. The HID report structure used to submit commands to wheels is shared amongst all functions that need to do so and some of these functions can be executed in parallel. Additionally, lg4ff_play() can be called from interrupt context by ff-memless module. Locking is necessary to prevent sending bogus data to the wheels. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Stop the hid device from lg4ffMichal Malý2015-05-071-0/+2
| | | | | | | | Stop the hid device from lg4ff. Originally hid-lg was responsible for stopping of the device. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Make lg4ff_wheel_data a separate structureMichal Malý2015-05-071-78/+88
| | | | | | | | Make lg4ff_wheel_data a separate structure stored within lg4ff_device_entry. Adjust the initialization process accordingly. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Update a warning messageMichal Malý2015-05-071-2/+3
| | | | | | | | | | Update a warning message for a case where device is incorrectly flagged to be handled by hid-lg4ff in hid-lg. The original warning message was highly misleading. This warning can be triggered only if a device is flagged to be handled by hid-lg4ff in hid-lg but hid-lg4ff lacks support for such device. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Explicit casts from void * are not necessaryMichal Malý2015-05-071-2/+2
| | | | | | | Explicit casts from void * are not necessary. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Remove unused variable from the "lg4ff_device_entry" struct.Michal Malý2015-05-071-1/+0
| | | | | | | | | Remove unused variable from the "lg4ff_device_entry" struct. This is a leftover from times where hid_get|set_drvdata() was not available to hid-lg4ff so it had to keep track of the devices it managed by itself. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Replace DEVICE_ATTR_RW with DEVICE_ATTR to have all internal ↵Michal Malý2015-05-071-6/+6
| | | | | | | | | | | | | functions prefixed with "lg4ff_" Replace DEVICE_ATTR_RW with DEVICE_ATTR to have all internal functions prefixed with "lg4ff_". All internal functions should be prefixed with just "lg4ff_". Usage of DEVICE_ATTR_RW breaks this scheme because it expects the functions' names to match the name of the respective sysfs entry. This partially reverts "2f1cec3250e38609bf9252db52dbbe61603c04a7" Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Remove "hid_" prefix from some functions' namesMichal Malý2015-05-071-14/+14
| | | | | | | | Remove "hid_" prefix from some functions' names. All internal functions of hid-lg4ff should be prefixed with just "lg4ff_" Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Remove double underscore prefix from numeric typesMichal Malý2015-05-071-26/+26
| | | | | | | | Remove double underscore prefix from numeric types. This code will never be used outside the kernel so the prefixes are unnecessary. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Fix "undefined reference" build issue with CONFIG_USB disabledMichal Malý2015-02-181-8/+9
| | | | | | | | | Fix "undefined reference" build issue with CONFIG_USB disabled; make the driver use generic HID API instead. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Allow switching of Logitech gaming wheels between ↵Michal Malý2015-02-181-29/+175
| | | | | | | | | | | compatibility modes Allow switching of Logitech gaming wheels between available compatibility modes through sysfs. This only applies to multimode wheels. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Tested-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Introduce a module parameter to disable automatic switch of ↵Michal Malý2015-02-181-1/+3
| | | | | | | | | | | compatibility mode Introduce a module parameter to disable automatic switch of Logitech gaming wheels from compatibility to native mode. This only applies to multimode wheels. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Tested-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Export the real wheel model and supported alternate modesMichal Malý2015-02-181-7/+198
| | | | | | | | | Display the real wheel model and supported alternate modes through sysfs. This applies only to multimode wheels. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Tested-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: Identify Logitech gaming wheels in compatibility modesMichal Malý2015-02-181-76/+190
| | | | | | | | | | | | | | | | | Identify Logitech gaming wheels in compatibility modes accordingly to Logitech specifications. Logitech specification contains a general method of identifying various models of their gaming wheels while they are in "compatibility" mode. This patch implements the method instead of checking against known values of bcdDevice. Handling of the mode switch upon initialization is also adjusted so that the driver does not have to go through the entire initialization routine because the wheels are set to perform a USB detach before they reappear in "native" mode. Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net> Tested-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: use DEVICE_ATTR_RW macroVivien Didelot2015-01-191-7/+5
| | | | | | | | Use the DEVICE_ATTR_RW macro to reduce boiler plate and move the attribute declaration to get rid of function signatures. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: hid-lg4ff: fix sysfs attribute permissionVivien Didelot2015-01-191-1/+2
| | | | | | | | There is no reason to set the range attribute executable to the user and group, and writable to the group. Fix the permission to 0644. Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: logitech: Prevent possibility of infinite loop when using /sys interfaceSimon Wood2014-08-151-2/+2
| | | | | | | | If the device data is not accessible for some reason, returning 0 will cause the call to be continuously called again as none of the string has been 'consumed'. Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* drivers/hid/hid-lg4ff.c: avoid world-writable sysfs files.Rusty Russell2014-05-141-1/+1
| | | | | | | | In line with practice for module parameters, we're adding a build-time check that sysfs files aren't world-writable. Cc: Simon Wood <simon@mungewell.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* HID: hid-lg4ff: Support new version of G27Simon Wood2014-03-141-0/+2
| | | | | | | | | | | It has been reported that there is a new hardware version of the G27 in the 'wild'. This patch add's this new revision so that it can be sent the command to switch to native mode. Reported-by: "Ivan Baldo" <ibaldo@adinet.com.uy> Tested-by: "evilcow" <evilcow93@yahoo.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID:hid-lg4ff: Correct Auto-center strength for wheels other than MOMO and MOMO2Simon Wood2013-11-081-0/+24
| | | | | | | | | | The MOMO and MOMO2 wheels have a slightly different autocenter command, and accept values in the range 0..F (rather than 0..7 for the other wheels). This patch uses the product ID to determine how to compute the strength. Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID:hid-lg4ff: Initialize device properties before we touch autocentering.Simon Wood2013-11-081-11/+11
| | | | | | | | | Re-arrange code slightly to ensure that device properties are configured before calling auto-center command. Reported-by: Michal Malý <madcatxster@prifuk.cz> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID:hid-lg4ff: ensure ConstantForce is disabled when set to 0Simon Wood2013-11-081-0/+15
| | | | | | | | | | | When 'Constant Force' is set to 0 it is not turned off completely, the wheel feels 'heavy'. This patch issues the '13 00..' command to ensure that the force in slot 1 (the Constant Force) is deactivated. Reported-by: Elias Vanderstuyft <elias.vds@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID:hid-lg4ff: Switch autocentering off when strength is set to zero.Simon Wood2013-11-081-0/+25
| | | | | | | | | | When the autocenter is set to zero, this patch issues a command to totally disable the autocenter - this results in less resistance in the wheel. Reported-by: Elias Vanderstuyft <elias.vds@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID:hid-lg4ff: Scale autocentering force properly on Logitech wheelSimon Wood2013-11-081-3/+12
| | | | | | | | | Adjust the scaling and lineartity to match that of the Windows driver (from MOMO testing). Reported-by: Elias Vanderstuyft <elias.vds@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: LG: validate HID output report detailsKees Cook2013-09-131-19/+1
| | | | | | | | | | | | | | | | | | | | A HID device could send a malicious output report that would cause the lg, lg3, and lg4 HID drivers to write beyond the output report allocation during an event, causing a heap overflow: [ 325.245240] usb 1-1: New USB device found, idVendor=046d, idProduct=c287 ... [ 414.518960] BUG kmalloc-4096 (Not tainted): Redzone overwritten Additionally, while lg2 did correctly validate the report details, it was cleaned up and shortened. CVE-2013-2893 Signed-off-by: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
*-. Merge branches 'for-3.10/appleir', 'for-3.10/hid-debug', ↵Jiri Kosina2013-04-301-9/+11
|\ \ | | | | | | | | | 'for-3.10/hid-driver-transport-cleanups', 'for-3.10/i2c-hid' and 'for-3.10/logitech' into for-linus
| | * HID: hid-lg4ff add support for new version of DFGT wheelSimon Wood2013-04-271-0/+2
| |/ |/| | | | | | | | | | | | | | | | | | | | | It has been reported that there is a new version (different USB rev) of the Logitech DFGT in the 'wild'. This patch allows the kernel to recognise this wheel and send it the command to enter native mode. Reported-by: "Denis Jovic" <djovic78@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| * HID: use hid_hw_request() instead of direct call to usbhidBenjamin Tissoires2013-02-251-9/+9
|/ | | | | | | | | | | | | | | | | | | This allows the hid drivers to be independent from the transport layer. The patch was constructed by replacing all occurences of usbhid_submit_report() by its hid_hw_request() counterpart. Then, drivers not requiring USB_HID anymore have their USB_HID dependency cleaned in the Kconfig file. Finally, few drivers still depends on USB_HID. Many of them are requiring the io wait callback. They are found in the next patch. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> For the sensor-hub part: Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* HID: LG4FF: Remove unnecessary deadzone codeSimon Wood2013-02-201-17/+0
| | | | | | | | | This patch removes code which is now unnecessary for setting the fuzz/flat characterics for the logitech DFP wheel. This is now done in the previous patch by marking the wheel as a multi-axis device. Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* Merge branch 'upstream' into for-linusJiri Kosina2012-10-011-2/+2
|\ | | | | | | | | Conflicts: drivers/hid/usbhid/hid-quirks.c
| * HID: lg4ff: Remove unnecessary casts of void pointersAxel Lin2012-09-171-2/+2
| | | | | | | | | | Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | HID: lg4ff: Minor coding style fixes in lg4ff and hid-lgMichal Malý2012-09-251-2/+2
| | | | | | | | | | | | | | Fixes a couple of minor coding style issues. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | HID: hid-lg4ff: Set absolute axes parametes on DFPMichal Malý2012-09-251-0/+17
| | | | | | | | | | | | | | | | | | | | | | | | The lg4ff driver doesn't fill the "input_absinfo" struct so it is left with default values. Applications with rely on information in this struct therefore do not work correctly with the wheel. Other Logitech wheels probably need this fix too, but again I do not have enough information to write it. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | HID: hid-lg4ff: Adjust X axis input value accordingly to selected range.Michal Malý2012-09-251-0/+54
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Range limiting command for the Driving Force Pro wheel is only a FF_SPRING effect so that the wheel creates resistance when the user tries to turn it past the limit. It is however possible to overpower the FFB motors quite easily which leads to the X axis value exceeding the expected limit. This confuses games which dynamically adjust calibration using the highest/lowest min and max values reported by the wheel. Joydev device driver also doesn't take in account any changes in an axis range after the joystick device is created. This patch recalculates received ABS_X axis value so it is always in <0; 16383> range where 0 is the left limit and 16383 the right limit. Logitech driver for Windows does the same thing. As for any concerns about possible loss of precision, I compared a large set of raw/adjusted values generated by "mult_frac" to values returned by the Windows driver and I got a 100% match. Other Logitech wheels will probably need a similar fix, but I currently lack the information needed to write one. Signed-off-by: Michal Malý <madcatxster@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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