* [hid:for-next 9/14] drivers/hid/hid-core.c:2053:43: warning: format '%ld' expects argument of type 'long int', but argument 5 has type 'size_t' {aka 'unsigned int'}
From: kernel test robot @ 2026-05-12 22:10 UTC (permalink / raw)
To: Benjamin Tissoires
Cc: oe-kbuild-all, linux-input, Jiri Kosina, Greg Kroah-Hartman
tree: https://git.kernel.org/pub/scm/linux/kernel/git/hid/hid.git for-next
head: 5d1aae9252b4632ef942017fdd18b9993a5a22ef
commit: 2c85c61d1332e1e16f020d76951baf167dcb6f7a [9/14] HID: pass the buffer size to hid_report_raw_event
config: nios2-defconfig (https://download.01.org/0day-ci/archive/20260513/202605130624.FPpzDGhD-lkp@intel.com/config)
compiler: nios2-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260513/202605130624.FPpzDGhD-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605130624.FPpzDGhD-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from include/linux/device.h:15,
from include/linux/input.h:19,
from drivers/hid/hid-core.c:25:
drivers/hid/hid-core.c: In function 'hid_report_raw_event':
>> drivers/hid/hid-core.c:2053:43: warning: format '%ld' expects argument of type 'long int', but argument 5 has type 'size_t' {aka 'unsigned int'} [-Wformat=]
2053 | hid_warn_ratelimited(hid, "Event data for report %d is incorrect (%d vs %ld)\n",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/dev_printk.h:110:30: note: in definition of macro 'dev_printk_index_wrap'
110 | _p_func(dev, fmt, ##__VA_ARGS__); \
| ^~~
include/linux/dev_printk.h:156:61: note: in expansion of macro 'dev_fmt'
156 | dev_printk_index_wrap(_dev_warn, KERN_WARNING, dev, dev_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~~
include/linux/dev_printk.h:215:17: note: in expansion of macro 'dev_warn'
215 | dev_level(dev, fmt, ##__VA_ARGS__); \
| ^~~~~~~~~
include/linux/dev_printk.h:227:9: note: in expansion of macro 'dev_level_ratelimited'
227 | dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/hid.h:1340:9: note: in expansion of macro 'dev_warn_ratelimited'
1340 | dev_warn_ratelimited(&(hid)->dev, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~
drivers/hid/hid-core.c:2053:17: note: in expansion of macro 'hid_warn_ratelimited'
2053 | hid_warn_ratelimited(hid, "Event data for report %d is incorrect (%d vs %ld)\n",
| ^~~~~~~~~~~~~~~~~~~~
drivers/hid/hid-core.c:2053:91: note: format string is defined here
2053 | hid_warn_ratelimited(hid, "Event data for report %d is incorrect (%d vs %ld)\n",
| ~~^
| |
| long int
| %d
In file included from include/linux/device.h:15,
from include/linux/input.h:19,
from drivers/hid/hid-core.c:25:
drivers/hid/hid-core.c:2075:43: warning: format '%ld' expects argument of type 'long int', but argument 5 has type 'size_t' {aka 'unsigned int'} [-Wformat=]
2075 | hid_warn_ratelimited(hid, "Event data for report %d was too short (%d vs %ld)\n",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/dev_printk.h:110:30: note: in definition of macro 'dev_printk_index_wrap'
110 | _p_func(dev, fmt, ##__VA_ARGS__); \
| ^~~
include/linux/dev_printk.h:156:61: note: in expansion of macro 'dev_fmt'
156 | dev_printk_index_wrap(_dev_warn, KERN_WARNING, dev, dev_fmt(fmt), ##__VA_ARGS__)
| ^~~~~~~
include/linux/dev_printk.h:215:17: note: in expansion of macro 'dev_warn'
215 | dev_level(dev, fmt, ##__VA_ARGS__); \
| ^~~~~~~~~
include/linux/dev_printk.h:227:9: note: in expansion of macro 'dev_level_ratelimited'
227 | dev_level_ratelimited(dev_warn, dev, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~~
include/linux/hid.h:1340:9: note: in expansion of macro 'dev_warn_ratelimited'
1340 | dev_warn_ratelimited(&(hid)->dev, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~
drivers/hid/hid-core.c:2075:17: note: in expansion of macro 'hid_warn_ratelimited'
2075 | hid_warn_ratelimited(hid, "Event data for report %d was too short (%d vs %ld)\n",
| ^~~~~~~~~~~~~~~~~~~~
drivers/hid/hid-core.c:2075:92: note: format string is defined here
2075 | hid_warn_ratelimited(hid, "Event data for report %d was too short (%d vs %ld)\n",
| ~~^
| |
| long int
| %d
vim +2053 drivers/hid/hid-core.c
2035
2036 int hid_report_raw_event(struct hid_device *hid, enum hid_report_type type, u8 *data,
2037 size_t bufsize, u32 size, int interrupt)
2038 {
2039 struct hid_report_enum *report_enum = hid->report_enum + type;
2040 struct hid_report *report;
2041 struct hid_driver *hdrv;
2042 int max_buffer_size = HID_MAX_BUFFER_SIZE;
2043 u32 rsize, csize = size;
2044 size_t bsize = bufsize;
2045 u8 *cdata = data;
2046 int ret = 0;
2047
2048 report = hid_get_report(report_enum, data);
2049 if (!report)
2050 return 0;
2051
2052 if (unlikely(bsize < csize)) {
> 2053 hid_warn_ratelimited(hid, "Event data for report %d is incorrect (%d vs %ld)\n",
2054 report->id, csize, bsize);
2055 return -EINVAL;
2056 }
2057
2058 if (report_enum->numbered) {
2059 cdata++;
2060 csize--;
2061 bsize--;
2062 }
2063
2064 rsize = hid_compute_report_size(report);
2065
2066 if (hid->ll_driver->max_buffer_size)
2067 max_buffer_size = hid->ll_driver->max_buffer_size;
2068
2069 if (report_enum->numbered && rsize >= max_buffer_size)
2070 rsize = max_buffer_size - 1;
2071 else if (rsize > max_buffer_size)
2072 rsize = max_buffer_size;
2073
2074 if (bsize < rsize) {
2075 hid_warn_ratelimited(hid, "Event data for report %d was too short (%d vs %ld)\n",
2076 report->id, rsize, bsize);
2077 return -EINVAL;
2078 }
2079
2080 if (csize < rsize) {
2081 dbg_hid("report %d is too short, (%d < %d)\n", report->id,
2082 csize, rsize);
2083 memset(cdata + csize, 0, rsize - csize);
2084 }
2085
2086 if ((hid->claimed & HID_CLAIMED_HIDDEV) && hid->hiddev_report_event)
2087 hid->hiddev_report_event(hid, report);
2088 if (hid->claimed & HID_CLAIMED_HIDRAW) {
2089 ret = hidraw_report_event(hid, data, size);
2090 if (ret)
2091 return ret;
2092 }
2093
2094 if (hid->claimed != HID_CLAIMED_HIDRAW && report->maxfield) {
2095 hid_process_report(hid, report, cdata, interrupt);
2096 hdrv = hid->driver;
2097 if (hdrv && hdrv->report)
2098 hdrv->report(hid, report);
2099 }
2100
2101 if (hid->claimed & HID_CLAIMED_INPUT)
2102 hidinput_report_event(hid, report);
2103
2104 return ret;
2105 }
2106 EXPORT_SYMBOL_GPL(hid_report_raw_event);
2107
2108
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply
* Re: [PATCH v3 0/6] iio: hid-sensor: standardize scan_type initialization
From: Andy Shevchenko @ 2026-05-12 20:21 UTC (permalink / raw)
To: Jonathan Cameron
Cc: Natália Salvino André, andy, dlechner, jikos, nuno.sa,
srinivas.pandruvada, linux-iio, linux-input
In-Reply-To: <20260512154204.0052b352@jic23-huawei>
On Tue, May 12, 2026 at 03:42:04PM +0100, Jonathan Cameron wrote:
> On Mon, 11 May 2026 22:16:16 -0300
> Natália Salvino André <natalia.andre@ime.usp.br> wrote:
>
> > This series refactors the HID sensor drivers to standardize the
> > initialization of the iio_chan_spec scan_type structure.
> > Direct initialization using compound literals was used.
> >
> > This change improves code readability and ensures that all fields
> > of the scan_type structure are properly zero-initialized.
> > Additionally, for the hid-sensor-accel-3d driver, the channel
> > initialization loop was refactored to iterate directly over the
> > scan indices, eliminating redundant logic.
> I'm a little confused. How is this v3? Where is the change log?
>
> I'll review it as a fresh series.
I remember seeing this series at least twice, so changelog is missing for sure.
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply
* [PATCH v5 3/3] HID: nintendo: Add unified report format support
From: Vicki Pfau @ 2026-05-12 20:00 UTC (permalink / raw)
To: Dmitry Torokhov, Jiri Kosina, Benjamin Tissoires, linux-input
Cc: Vicki Pfau, Silvan Jegen
In-Reply-To: <20260512200051.2534081-1-vi@endrift.com>
This adds support for the "unified" report format that all controllers also
support, which has overlapping fields for like buttons and axes between
them.
Reviewed-by: Silvan Jegen <s.jegen@gmail.com>
Tested-by: Silvan Jegen <s.jegen@gmail.com>
Signed-off-by: Vicki Pfau <vi@endrift.com>
---
drivers/hid/hid-nintendo.c | 148 +++++++++++++++++++++++++++++++++++--
1 file changed, 143 insertions(+), 5 deletions(-)
diff --git a/drivers/hid/hid-nintendo.c b/drivers/hid/hid-nintendo.c
index 9801799a9075..9e7eda7b70bf 100644
--- a/drivers/hid/hid-nintendo.c
+++ b/drivers/hid/hid-nintendo.c
@@ -2824,6 +2824,36 @@ static int joycon_suspend(struct hid_device *hdev, pm_message_t message)
#define NS2_BTN3_SR BIT(6)
#define NS2_BTN3_SL BIT(7)
+#define NS2_BTN_U1_Y BIT(0)
+#define NS2_BTN_U1_X BIT(1)
+#define NS2_BTN_U1_B BIT(2)
+#define NS2_BTN_U1_A BIT(3)
+#define NS2_BTN_U1_SR BIT(4)
+#define NS2_BTN_U1_SL BIT(5)
+#define NS2_BTN_U1_R BIT(6)
+#define NS2_BTN_U1_ZR BIT(7)
+
+#define NS2_BTN_U2_MINUS BIT(0)
+#define NS2_BTN_U2_PLUS BIT(1)
+#define NS2_BTN_U2_RS BIT(2)
+#define NS2_BTN_U2_LS BIT(3)
+#define NS2_BTN_U2_HOME BIT(4)
+#define NS2_BTN_U2_CAPTURE BIT(5)
+#define NS2_BTN_U2_C BIT(6)
+
+#define NS2_BTN_U3_DOWN BIT(0)
+#define NS2_BTN_U3_UP BIT(1)
+#define NS2_BTN_U3_RIGHT BIT(2)
+#define NS2_BTN_U3_LEFT BIT(3)
+#define NS2_BTN_U3_SR BIT(4)
+#define NS2_BTN_U3_SL BIT(5)
+#define NS2_BTN_U3_L BIT(6)
+#define NS2_BTN_U3_ZL BIT(7)
+
+#define NS2_BTN_U4_GR BIT(0)
+#define NS2_BTN_U4_GL BIT(1)
+#define NS2_BTN_U4_HEADSET BIT(5)
+
#define NS2_BTN_JCR_HOME BIT(0)
#define NS2_BTN_JCR_GR BIT(2)
#define NS2_BTN_JCR_C NS2_BTN3_C
@@ -3069,6 +3099,22 @@ static const struct switch2_ctlr_button_mapping ns2_left_joycon_button_mappings[
{ /* sentinel */ },
};
+static const struct switch2_ctlr_button_mapping ns2_left_joycon_button_unified_mappings[] = {
+ { BTN_DPAD_LEFT, 2, NS2_BTN_U3_LEFT, },
+ { BTN_DPAD_UP, 2, NS2_BTN_U3_UP, },
+ { BTN_DPAD_DOWN, 2, NS2_BTN_U3_DOWN, },
+ { BTN_DPAD_RIGHT, 2, NS2_BTN_U3_RIGHT, },
+ { BTN_TL, 2, NS2_BTN_U3_L, },
+ { BTN_TL2, 2, NS2_BTN_U3_ZL, },
+ { BTN_SELECT, 1, NS2_BTN_U2_MINUS, },
+ { BTN_THUMBL, 1, NS2_BTN_U2_LS, },
+ { KEY_RECORD, 1, NS2_BTN_U2_CAPTURE, },
+ { BTN_GRIPR, 2, NS2_BTN_U3_SL, },
+ { BTN_GRIPR2, 2, NS2_BTN_U3_SR, },
+ { BTN_GRIPL, 3, NS2_BTN_U4_GL, },
+ { /* sentinel */ },
+};
+
static const struct switch2_ctlr_button_mapping ns2_right_joycon_button_mappings[] = {
{ BTN_SOUTH, 0, NS2_BTNR_A, },
{ BTN_EAST, 0, NS2_BTNR_B, },
@@ -3086,6 +3132,23 @@ static const struct switch2_ctlr_button_mapping ns2_right_joycon_button_mappings
{ /* sentinel */ },
};
+static const struct switch2_ctlr_button_mapping ns2_right_joycon_button_unified_mappings[] = {
+ { BTN_SOUTH, 0, NS2_BTN_U1_A, },
+ { BTN_EAST, 0, NS2_BTN_U1_B, },
+ { BTN_NORTH, 0, NS2_BTN_U1_X, },
+ { BTN_WEST, 0, NS2_BTN_U1_Y, },
+ { BTN_TR, 0, NS2_BTN_U1_R, },
+ { BTN_TR2, 0, NS2_BTN_U1_ZR },
+ { BTN_START, 1, NS2_BTN_U2_PLUS, },
+ { BTN_THUMBR, 1, NS2_BTN_U2_RS, },
+ { BTN_C, 1, NS2_BTN_U2_C, },
+ { BTN_MODE, 1, NS2_BTN_U2_HOME, },
+ { BTN_GRIPL2, 0, NS2_BTN_U1_SL, },
+ { BTN_GRIPL, 0, NS2_BTN_U1_SR, },
+ { BTN_GRIPR, 3, NS2_BTN_U4_GR, },
+ { /* sentinel */ },
+};
+
static const struct switch2_ctlr_button_mapping ns2_procon_mappings[] = {
{ BTN_SOUTH, 0, NS2_BTNR_A, },
{ BTN_EAST, 0, NS2_BTNR_B, },
@@ -3107,6 +3170,27 @@ static const struct switch2_ctlr_button_mapping ns2_procon_mappings[] = {
{ /* sentinel */ },
};
+static const struct switch2_ctlr_button_mapping ns2_procon_unified_mappings[] = {
+ { BTN_SOUTH, 0, NS2_BTN_U1_A, },
+ { BTN_EAST, 0, NS2_BTN_U1_B, },
+ { BTN_NORTH, 0, NS2_BTN_U1_X, },
+ { BTN_WEST, 0, NS2_BTN_U1_Y, },
+ { BTN_TL, 2, NS2_BTN_U3_L, },
+ { BTN_TR, 0, NS2_BTN_U1_R, },
+ { BTN_TL2, 2, NS2_BTN_U3_ZL, },
+ { BTN_TR2, 0, NS2_BTN_U1_ZR, },
+ { BTN_SELECT, 1, NS2_BTN_U2_MINUS, },
+ { BTN_START, 1, NS2_BTN_U2_PLUS, },
+ { BTN_THUMBL, 1, NS2_BTN_U2_LS, },
+ { BTN_THUMBR, 1, NS2_BTN_U2_RS, },
+ { BTN_MODE, 1, NS2_BTN_U2_HOME },
+ { KEY_RECORD, 1, NS2_BTN_U2_CAPTURE },
+ { BTN_GRIPR, 3, NS2_BTN_U4_GR },
+ { BTN_GRIPL, 3, NS2_BTN_U4_GL },
+ { BTN_C, 1, NS2_BTN_U2_C },
+ { /* sentinel */ },
+};
+
static const struct switch2_ctlr_button_mapping ns2_gccon_mappings[] = {
{ BTN_SOUTH, 0, NS2_BTNR_A, },
{ BTN_EAST, 0, NS2_BTNR_B, },
@@ -3124,6 +3208,23 @@ static const struct switch2_ctlr_button_mapping ns2_gccon_mappings[] = {
{ /* sentinel */ },
};
+static const struct switch2_ctlr_button_mapping ns2_gccon_unified_mappings[] = {
+ { BTN_SOUTH, 0, NS2_BTN_U1_A, },
+ { BTN_EAST, 0, NS2_BTN_U1_B, },
+ { BTN_NORTH, 0, NS2_BTN_U1_X, },
+ { BTN_WEST, 0, NS2_BTN_U1_Y, },
+ { BTN_TL2, 2, NS2_BTN_U3_L, },
+ { BTN_TR2, 0, NS2_BTN_U1_R, },
+ { BTN_TL, 2, NS2_BTN_U3_ZL },
+ { BTN_TR, 0, NS2_BTN_U1_ZR },
+ { BTN_SELECT, 1, NS2_BTN_U2_MINUS, },
+ { BTN_START, 1, NS2_BTN_U2_PLUS, },
+ { BTN_MODE, 1, NS2_BTN_U2_HOME },
+ { KEY_RECORD, 1, NS2_BTN_U2_CAPTURE },
+ { BTN_C, 1, NS2_BTN_U2_C },
+ { /* sentinel */ },
+};
+
static const uint8_t switch2_init_cmd_data[] = {
/*
* The last 6 bytes of this packet are the MAC address of
@@ -3690,11 +3791,48 @@ static int switch2_event(struct hid_device *hdev, struct hid_report *report, uin
switch (report->id) {
case NS2_REPORT_UNIFIED:
- /*
- * TODO
- * This won't be sent unless the report type gets changed via command
- * 03-0A, but we should support it at some point regardless.
- */
+ switch (ns2->ctlr_type) {
+ case NS2_CTLR_TYPE_JCL:
+ switch2_report_stick(input, &ns2->stick_calib[0],
+ ABS_X, false, ABS_Y, true, &raw_data[11]);
+ switch2_report_buttons(input, &raw_data[5],
+ ns2_left_joycon_button_unified_mappings);
+ break;
+ case NS2_CTLR_TYPE_JCR:
+ switch2_report_stick(input, &ns2->stick_calib[0],
+ ABS_X, false, ABS_Y, true, &raw_data[14]);
+ switch2_report_buttons(input, &raw_data[5],
+ ns2_right_joycon_button_unified_mappings);
+ break;
+ case NS2_CTLR_TYPE_GC:
+ input_report_abs(input, ABS_HAT0X,
+ !!(raw_data[7] & NS2_BTN_U3_RIGHT) -
+ !!(raw_data[7] & NS2_BTN_U3_LEFT));
+ input_report_abs(input, ABS_HAT0Y,
+ !!(raw_data[7] & NS2_BTN_U3_DOWN) -
+ !!(raw_data[7] & NS2_BTN_U3_UP));
+ switch2_report_buttons(input, &raw_data[5], ns2_gccon_unified_mappings);
+ switch2_report_stick(input, &ns2->stick_calib[0],
+ ABS_X, false, ABS_Y, true, &raw_data[11]);
+ switch2_report_stick(input, &ns2->stick_calib[1],
+ ABS_RX, false, ABS_RY, true, &raw_data[14]);
+ switch2_report_trigger(input, ns2->lt_zero, ABS_Z, raw_data[0x3d]);
+ switch2_report_trigger(input, ns2->rt_zero, ABS_RZ, raw_data[0x3e]);
+ break;
+ case NS2_CTLR_TYPE_PRO:
+ input_report_abs(input, ABS_HAT0X,
+ !!(raw_data[7] & NS2_BTN_U3_RIGHT) -
+ !!(raw_data[7] & NS2_BTN_U3_LEFT));
+ input_report_abs(input, ABS_HAT0Y,
+ !!(raw_data[7] & NS2_BTN_U3_DOWN) -
+ !!(raw_data[7] & NS2_BTN_U3_UP));
+ switch2_report_buttons(input, &raw_data[5], ns2_procon_unified_mappings);
+ switch2_report_stick(input, &ns2->stick_calib[0],
+ ABS_X, false, ABS_Y, true, &raw_data[11]);
+ switch2_report_stick(input, &ns2->stick_calib[1],
+ ABS_RX, false, ABS_RY, true, &raw_data[14]);
+ break;
+ }
break;
case NS2_REPORT_JCL:
switch2_report_stick(input, &ns2->stick_calib[0], ABS_X, false,
--
2.54.0
^ permalink raw reply related
* [PATCH v5 2/3] HID: nintendo: Add rumble support for Switch 2 controllers
From: Vicki Pfau @ 2026-05-12 20:00 UTC (permalink / raw)
To: Dmitry Torokhov, Jiri Kosina, Benjamin Tissoires, linux-input
Cc: Vicki Pfau, Silvan Jegen
In-Reply-To: <20260512200051.2534081-1-vi@endrift.com>
This adds rumble support for both the "HD Rumble" linear resonant actuator
type as used in the Joy-Cons and Pro Controller, as well as the eccentric
rotating mass type used in the GameCube controller. Note that since there's
currently no API for exposing full control of LRAs with evdev, it only
simulates a basic rumble for now.
Reviewed-by: Silvan Jegen <s.jegen@gmail.com>
Tested-by: Silvan Jegen <s.jegen@gmail.com>
Signed-off-by: Vicki Pfau <vi@endrift.com>
---
drivers/hid/Kconfig | 8 +-
drivers/hid/hid-nintendo.c | 179 ++++++++++++++++++++++++++++++++++++-
2 files changed, 181 insertions(+), 6 deletions(-)
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 19c77c323ec9..851eed76c236 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -859,10 +859,10 @@ config NINTENDO_FF
depends on HID_NINTENDO
select INPUT_FF_MEMLESS
help
- Say Y here if you have a Nintendo Switch controller and want to enable
- force feedback support for it. This works for both joy-cons, the pro
- controller, and the NSO N64 controller. For the pro controller, both
- rumble motors can be controlled individually.
+ Say Y here if you have a Nintendo Switch or Switch 2 controller and want
+ to enable force feedback support for it. This works for Joy-Cons, the Pro
+ Controllers, and the NSO N64 and GameCube controller. For the Pro
+ Controller, both rumble motors can be controlled individually.
config HID_NTI
tristate "NTI keyboard adapters"
diff --git a/drivers/hid/hid-nintendo.c b/drivers/hid/hid-nintendo.c
index 2193afcdefab..9801799a9075 100644
--- a/drivers/hid/hid-nintendo.c
+++ b/drivers/hid/hid-nintendo.c
@@ -2972,6 +2972,18 @@ struct switch2_stick_calibration {
struct switch2_axis_calibration y;
};
+struct switch2_hd_rumble {
+ uint16_t hi_freq : 10;
+ uint16_t hi_amp : 10;
+ uint16_t lo_freq : 10;
+ uint16_t lo_amp : 10;
+} __packed;
+
+struct switch2_erm_rumble {
+ uint16_t error;
+ uint16_t amplitude;
+};
+
struct switch2_controller {
struct hid_device *hdev;
struct switch2_cfg_intf *cfg;
@@ -2993,8 +3005,45 @@ struct switch2_controller {
uint32_t player_id;
struct led_classdev leds[4];
+
+#if IS_ENABLED(CONFIG_NINTENDO_FF)
+ spinlock_t rumble_lock;
+ uint8_t rumble_seq;
+ union {
+ struct switch2_hd_rumble hd;
+ struct switch2_erm_rumble sd;
+ } rumble;
+ unsigned long last_rumble_work;
+ struct delayed_work rumble_work;
+ uint8_t rumble_buffer[64];
+#endif
+};
+
+enum gc_rumble {
+ GC_RUMBLE_OFF = 0,
+ GC_RUMBLE_ON = 1,
+ GC_RUMBLE_STOP = 2,
};
+/*
+ * The highest rumble level for "HD Rumble" is strong enough to potentially damage the controller,
+ * and also leaves your hands feeling like melted jelly, so we set a semi-arbitrary scaling factor
+ * to artificially limit the maximum for safety and comfort. It is currently unknown if the Switch
+ * 2 itself does something similar, but it's quite likely.
+ *
+ * This value must be between 0 and 1024, otherwise the math below will overflow.
+ */
+#define RUMBLE_MAX 450u
+
+/*
+ * Semi-arbitrary values used to simulate the "rumble" sensation of an eccentric rotating
+ * mass type haptic motor on the Switch 2 controllers' linear resonant actuator type haptics.
+ *
+ * The units used are unknown, but the values must be between 0 and 1023.
+ */
+#define RUMBLE_HI_FREQ 0x187
+#define RUMBLE_LO_FREQ 0x112
+
static DEFINE_MUTEX(switch2_controllers_lock);
static LIST_HEAD(switch2_controllers);
@@ -3084,9 +3133,12 @@ static const uint8_t switch2_init_cmd_data[] = {
};
static const uint8_t switch2_one_data[] = { 0x01, 0x00, 0x00, 0x00 };
+#if IS_ENABLED(CONFIG_NINTENDO_FF)
+static const uint8_t switch2_zero_data[] = { 0x00, 0x00, 0x00, 0x00 };
+#endif
static const uint8_t switch2_feature_mask[] = {
- NS2_FEATURE_BUTTONS | NS2_FEATURE_ANALOG | NS2_FEATURE_IMU,
+ NS2_FEATURE_BUTTONS | NS2_FEATURE_ANALOG | NS2_FEATURE_IMU | NS2_FEATURE_RUMBLE,
0x00, 0x00, 0x00
};
@@ -3103,6 +3155,107 @@ static inline bool switch2_ctlr_is_joycon(enum switch2_ctlr_type type)
return type == NS2_CTLR_TYPE_JCL || type == NS2_CTLR_TYPE_JCR;
}
+#if IS_ENABLED(CONFIG_NINTENDO_FF)
+static void switch2_encode_rumble(struct switch2_hd_rumble *rumble, uint8_t buffer[5])
+{
+ buffer[0] = rumble->hi_freq;
+ buffer[1] = (rumble->hi_freq >> 8) | (rumble->hi_amp << 2);
+ buffer[2] = (rumble->hi_amp >> 6) | (rumble->lo_freq << 4);
+ buffer[3] = (rumble->lo_freq >> 4) | (rumble->lo_amp << 6);
+ buffer[4] = rumble->lo_amp >> 2;
+}
+
+static int switch2_play_effect(struct input_dev *dev, void *data, struct ff_effect *effect)
+{
+ struct switch2_controller *ns2 = input_get_drvdata(dev);
+
+ if (effect->type != FF_RUMBLE)
+ return 0;
+
+ guard(spinlock_irqsave)(&ns2->rumble_lock);
+ if (ns2->ctlr_type == NS2_CTLR_TYPE_GC) {
+ ns2->rumble.sd.amplitude = max(effect->u.rumble.strong_magnitude,
+ effect->u.rumble.weak_magnitude >> 1);
+ } else {
+ ns2->rumble.hd.hi_amp = effect->u.rumble.weak_magnitude * RUMBLE_MAX >> 16;
+ ns2->rumble.hd.lo_amp = effect->u.rumble.strong_magnitude * RUMBLE_MAX >> 16;
+ }
+
+ if (ns2->hdev)
+ schedule_delayed_work(&ns2->rumble_work, 0);
+
+ return 0;
+}
+
+static void switch2_rumble_work(struct work_struct *work)
+{
+ struct switch2_controller *ns2 = container_of(to_delayed_work(work),
+ struct switch2_controller, rumble_work);
+ unsigned long current_ms = jiffies_to_msecs(get_jiffies_64());
+ unsigned long flags;
+ bool active;
+ int ret;
+
+ spin_lock_irqsave(&ns2->rumble_lock, flags);
+ ns2->rumble_buffer[0x1] = 0x50 | ns2->rumble_seq;
+ if (ns2->ctlr_type == NS2_CTLR_TYPE_GC) {
+ ns2->rumble_buffer[0] = 3;
+ if (ns2->rumble.sd.amplitude == 0) {
+ ns2->rumble_buffer[2] = GC_RUMBLE_STOP;
+ ns2->rumble.sd.error = 0;
+ active = false;
+ } else {
+ if (ns2->rumble.sd.error < ns2->rumble.sd.amplitude) {
+ ns2->rumble_buffer[2] = GC_RUMBLE_ON;
+ ns2->rumble.sd.error += U16_MAX - ns2->rumble.sd.amplitude;
+ } else {
+ ns2->rumble_buffer[2] = GC_RUMBLE_OFF;
+ ns2->rumble.sd.error -= ns2->rumble.sd.amplitude;
+ }
+ active = true;
+ }
+ } else {
+ ns2->rumble_buffer[0] = 1;
+ switch2_encode_rumble(&ns2->rumble.hd, &ns2->rumble_buffer[0x2]);
+ active = ns2->rumble.hd.hi_amp || ns2->rumble.hd.lo_amp;
+ if (ns2->ctlr_type == NS2_CTLR_TYPE_PRO) {
+ /*
+ * The Pro Controller contains separate LRAs on each
+ * side that can be controlled individually.
+ */
+ ns2->rumble_buffer[0] = 2;
+ ns2->rumble_buffer[0x11] = 0x50 | ns2->rumble_seq;
+ switch2_encode_rumble(&ns2->rumble.hd, &ns2->rumble_buffer[0x12]);
+ }
+ }
+ ns2->rumble_seq = (ns2->rumble_seq + 1) & 0xF;
+
+ if (active) {
+ unsigned long interval = msecs_to_jiffies(4);
+
+ if (!ns2->last_rumble_work)
+ ns2->last_rumble_work = current_ms;
+ else
+ ns2->last_rumble_work += interval;
+ schedule_delayed_work(&ns2->rumble_work,
+ ns2->last_rumble_work + interval - current_ms);
+ } else {
+ ns2->last_rumble_work = 0;
+ }
+ spin_unlock_irqrestore(&ns2->rumble_lock, flags);
+
+ if (!ns2->hdev) {
+ cancel_delayed_work(&ns2->rumble_work);
+ ret = -ENODEV;
+ } else {
+ ret = hid_hw_output_report(ns2->hdev, ns2->rumble_buffer, 64);
+ }
+
+ if (ret < 0)
+ hid_dbg(ns2->hdev, "Failed to send output report ret=%d\n", ret);
+}
+#endif
+
static int switch2_set_leds(struct switch2_controller *ns2)
{
int i;
@@ -3226,6 +3379,15 @@ static int switch2_init_input(struct switch2_controller *ns2)
return -EINVAL;
}
+#if IS_ENABLED(CONFIG_NINTENDO_FF)
+ input_set_capability(input, EV_FF, FF_RUMBLE);
+ ret = input_ff_create_memless(input, NULL, switch2_play_effect);
+ if (ret) {
+ input_free_device(input);
+ return ret;
+ }
+#endif
+
hid_info(ns2->hdev, "Firmware version %u.%u.%u (type %i)\n", ns2->version.major,
ns2->version.minor, ns2->version.patch, ns2->version.ctlr_type);
if (ns2->version.dsp_type >= 0)
@@ -3308,6 +3470,10 @@ static void switch2_controller_put(struct switch2_controller *ns2)
if (input)
input_unregister_device(input);
+#if IS_ENABLED(CONFIG_NINTENDO_FF)
+ cancel_delayed_work_sync(&ns2->rumble_work);
+#endif
+
if (do_free) {
list_del_init(&ns2->entry);
mutex_destroy(&ns2->lock);
@@ -3667,7 +3833,8 @@ static int switch2_init_controller(struct switch2_controller *ns2)
return ns2->cfg->send_command(NS2_CMD_FEATSEL, NS2_SUBCMD_FEATSEL_SET_MASK,
switch2_feature_mask, sizeof(switch2_feature_mask), ns2->cfg);
case NS2_INIT_ENABLE_FEATURES:
- return switch2_features_enable(ns2, NS2_FEATURE_BUTTONS | NS2_FEATURE_ANALOG);
+ return switch2_features_enable(ns2, NS2_FEATURE_BUTTONS |
+ NS2_FEATURE_ANALOG | NS2_FEATURE_RUMBLE);
case NS2_INIT_GRIP_BUTTONS:
if (!switch2_ctlr_is_joycon(ns2->ctlr_type)) {
switch2_init_step_done(ns2, ns2->init_step);
@@ -3881,6 +4048,14 @@ static int switch2_probe(struct hid_device *hdev, const struct hid_device_id *id
switch2_leds_create(ns2);
+#if IS_ENABLED(CONFIG_NINTENDO_FF)
+ if (ns2->ctlr_type != NS2_CTLR_TYPE_GC) {
+ ns2->rumble.hd.hi_freq = RUMBLE_HI_FREQ;
+ ns2->rumble.hd.lo_freq = RUMBLE_LO_FREQ;
+ }
+ spin_lock_init(&ns2->rumble_lock);
+ INIT_DELAYED_WORK(&ns2->rumble_work, switch2_rumble_work);
+#endif
hid_set_drvdata(hdev, ns2);
if (ns2->cfg)
--
2.54.0
^ permalink raw reply related
* [PATCH v5 1/3] HID: nintendo: Add preliminary Switch 2 controller driver
From: Vicki Pfau @ 2026-05-12 20:00 UTC (permalink / raw)
To: Dmitry Torokhov, Jiri Kosina, Benjamin Tissoires, linux-input
Cc: Vicki Pfau, Silvan Jegen
In-Reply-To: <20260512200051.2534081-1-vi@endrift.com>
This adds a new driver for the Switch 2 controllers. The Switch 2 uses an
unusual split-interface design such that input and rumble occur on the main
HID interface, but all other communication occurs over a "configuration"
interface. This is the case on both USB and Bluetooth, so this new driver
uses a split-driver design with the HID interface being the "main" driver
and the configuration interface is a secondary driver that looks up to the
HID interface, sharing resources on a common struct.
Due to using a non-standard pairing interface as well as Bluetooth
communications being extremely limited in the kernel, a custom interface
between userspace and the kernel will need to be designed, along with
bringup in BlueZ. That is beyond the scope of this initial patch, which
only contains the generic HID and USB configuration interface drivers.
This initial work supports general input for the Joy-Con 2, Pro Controller
2, and GameCube NSO controllers. IMU, rumble and battery support is not yet
present.
Reviewed-by: Silvan Jegen <s.jegen@gmail.com>
Tested-by: Silvan Jegen <s.jegen@gmail.com>
Signed-off-by: Vicki Pfau <vi@endrift.com>
---
MAINTAINERS | 1 +
drivers/hid/Kconfig | 11 +-
drivers/hid/hid-ids.h | 4 +
drivers/hid/hid-nintendo.c | 1191 ++++++++++++++++-
drivers/hid/hid-nintendo.h | 72 +
drivers/input/joystick/Kconfig | 11 +
drivers/input/joystick/Makefile | 1 +
drivers/input/joystick/nintendo-switch2-usb.c | 353 +++++
8 files changed, 1634 insertions(+), 10 deletions(-)
create mode 100644 drivers/hid/hid-nintendo.h
create mode 100644 drivers/input/joystick/nintendo-switch2-usb.c
diff --git a/MAINTAINERS b/MAINTAINERS
index d317e2ca65c1..9ebecc0297a9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18882,6 +18882,7 @@ F: drivers/scsi/nsp32*
NINTENDO HID DRIVER
M: Daniel J. Ogorchock <djogorchock@gmail.com>
+M: Vicki Pfau <vi@endrift.com>
L: linux-input@vger.kernel.org
S: Maintained
F: drivers/hid/hid-nintendo*
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index f9bcaeb66385..19c77c323ec9 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -843,10 +843,13 @@ config HID_NINTENDO
depends on LEDS_CLASS
select POWER_SUPPLY
help
- Adds support for the Nintendo Switch Joy-Cons, NSO, Pro Controller.
- All controllers support bluetooth, and the Pro Controller also supports
- its USB mode. This also includes support for the Nintendo Switch Online
- Controllers which include the NES, Genesis, SNES, and N64 controllers.
+ Adds support for the Nintendo Switch Joy-Cons, NSO, Pro Controller, as
+ well as Nintendo Switch 2 Joy-Cons, Pro Controller, and NSO GameCube
+ controllers. All Switch controllers support bluetooth, and the Pro
+ Controller also supports its USB mode. This also includes support for
+ the Nintendo Switch Online Controllers which include the NES, Genesis,
+ SNES, and N64 controllers. Switch 2 controllers currently only support
+ USB mode.
To compile this driver as a module, choose M here: the
module will be called hid-nintendo.
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 20e7d2dbbf7c..0ac906fbbf1c 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1098,6 +1098,10 @@
#define USB_DEVICE_ID_NINTENDO_SNESCON 0x2017
#define USB_DEVICE_ID_NINTENDO_GENCON 0x201e
#define USB_DEVICE_ID_NINTENDO_N64CON 0x2019
+#define USB_DEVICE_ID_NINTENDO_NS2_JOYCONR 0x2066
+#define USB_DEVICE_ID_NINTENDO_NS2_JOYCONL 0x2067
+#define USB_DEVICE_ID_NINTENDO_NS2_PROCON 0x2069
+#define USB_DEVICE_ID_NINTENDO_NS2_GCCON 0x2073
#define USB_VENDOR_ID_NOVATEK 0x0603
#define USB_DEVICE_ID_NOVATEK_PCT 0x0600
diff --git a/drivers/hid/hid-nintendo.c b/drivers/hid/hid-nintendo.c
index 29008c2cc530..2193afcdefab 100644
--- a/drivers/hid/hid-nintendo.c
+++ b/drivers/hid/hid-nintendo.c
@@ -1,11 +1,13 @@
// SPDX-License-Identifier: GPL-2.0+
/*
- * HID driver for Nintendo Switch Joy-Cons and Pro Controllers
+ * HID driver for Nintendo Switch Joy-Cons and Pro Controllers, as well as
+ * Nintendo Switch 2 Joy-Cons, Pro Controller, and GameCube Controller
*
* Copyright (c) 2019-2021 Daniel J. Ogorchock <djogorchock@gmail.com>
* Portions Copyright (c) 2020 Nadia Holmquist Pedersen <nadia@nhp.sh>
* Copyright (c) 2022 Emily Strickland <linux@emily.st>
* Copyright (c) 2023 Ryan McClelland <rymcclel@gmail.com>
+ * Copyright (c) 2026 Valve Software
*
* The following resources/projects were referenced for this driver:
* https://github.com/dekuNukem/Nintendo_Switch_Reverse_Engineering
@@ -13,6 +15,8 @@
* https://github.com/FrotBot/SwitchProConLinuxUSB
* https://github.com/MTCKC/ProconXInput
* https://github.com/Davidobot/BetterJoyForCemu
+ * https://gist.github.com/shinyquagsire23/66f006b46c56216acbaac6c1e2279b64
+ * https://github.com/ndeadly/switch2_controller_research
* hid-wiimote kernel hid driver
* hid-logitech-hidpp driver
* hid-sony driver
@@ -29,6 +33,7 @@
*/
#include "hid-ids.h"
+#include "hid-nintendo.h"
#include <linux/unaligned.h>
#include <linux/delay.h>
#include <linux/device.h>
@@ -41,6 +46,8 @@
#include <linux/module.h>
#include <linux/power_supply.h>
#include <linux/spinlock.h>
+#include <linux/usb.h>
+#include "usbhid/usbhid.h"
/*
* Reference the url below for the following HID report defines:
@@ -2614,7 +2621,7 @@ static int joycon_ctlr_handle_event(struct joycon_ctlr *ctlr, u8 *data,
return ret;
}
-static int nintendo_hid_event(struct hid_device *hdev,
+static int joycon_event(struct hid_device *hdev,
struct hid_report *report, u8 *raw_data, int size)
{
struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
@@ -2625,7 +2632,7 @@ static int nintendo_hid_event(struct hid_device *hdev,
return joycon_ctlr_handle_event(ctlr, raw_data, size);
}
-static int nintendo_hid_probe(struct hid_device *hdev,
+static int joycon_probe(struct hid_device *hdev,
const struct hid_device_id *id)
{
int ret;
@@ -2729,7 +2736,7 @@ static int nintendo_hid_probe(struct hid_device *hdev,
return ret;
}
-static void nintendo_hid_remove(struct hid_device *hdev)
+static void joycon_remove(struct hid_device *hdev)
{
struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
unsigned long flags;
@@ -2748,7 +2755,7 @@ static void nintendo_hid_remove(struct hid_device *hdev)
hid_hw_stop(hdev);
}
-static int nintendo_hid_resume(struct hid_device *hdev)
+static int joycon_resume(struct hid_device *hdev)
{
struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
int ret;
@@ -2771,7 +2778,7 @@ static int nintendo_hid_resume(struct hid_device *hdev)
return ret;
}
-static int nintendo_hid_suspend(struct hid_device *hdev, pm_message_t message)
+static int joycon_suspend(struct hid_device *hdev, pm_message_t message)
{
struct joycon_ctlr *ctlr = hid_get_drvdata(hdev);
@@ -2790,7 +2797,1121 @@ static int nintendo_hid_suspend(struct hid_device *hdev, pm_message_t message)
return 0;
}
+/*
+ * =============================================================================
+ * Switch 2 support
+ * =============================================================================
+ */
+#define NS2_BTNR_B BIT(0)
+#define NS2_BTNR_A BIT(1)
+#define NS2_BTNR_Y BIT(2)
+#define NS2_BTNR_X BIT(3)
+#define NS2_BTNR_R BIT(4)
+#define NS2_BTNR_ZR BIT(5)
+#define NS2_BTNR_PLUS BIT(6)
+#define NS2_BTNR_RS BIT(7)
+
+#define NS2_BTNL_DOWN BIT(0)
+#define NS2_BTNL_RIGHT BIT(1)
+#define NS2_BTNL_LEFT BIT(2)
+#define NS2_BTNL_UP BIT(3)
+#define NS2_BTNL_L BIT(4)
+#define NS2_BTNL_ZL BIT(5)
+#define NS2_BTNL_MINUS BIT(6)
+#define NS2_BTNL_LS BIT(7)
+
+#define NS2_BTN3_C BIT(4)
+#define NS2_BTN3_SR BIT(6)
+#define NS2_BTN3_SL BIT(7)
+
+#define NS2_BTN_JCR_HOME BIT(0)
+#define NS2_BTN_JCR_GR BIT(2)
+#define NS2_BTN_JCR_C NS2_BTN3_C
+#define NS2_BTN_JCR_SR NS2_BTN3_SR
+#define NS2_BTN_JCR_SL NS2_BTN3_SL
+
+#define NS2_BTN_JCL_CAPTURE BIT(0)
+#define NS2_BTN_JCL_GL BIT(2)
+#define NS2_BTN_JCL_SR NS2_BTN3_SR
+#define NS2_BTN_JCL_SL NS2_BTN3_SL
+
+#define NS2_BTN_PRO_HOME BIT(0)
+#define NS2_BTN_PRO_CAPTURE BIT(1)
+#define NS2_BTN_PRO_GR BIT(2)
+#define NS2_BTN_PRO_GL BIT(3)
+#define NS2_BTN_PRO_C NS2_BTN3_C
+
+#define NS2_BTN_GC_HOME BIT(0)
+#define NS2_BTN_GC_CAPTURE BIT(1)
+#define NS2_BTN_GC_C NS2_BTN3_C
+
+#define NS2_TRIGGER_RANGE 4095
+#define NS2_AXIS_MIN -32768
+#define NS2_AXIS_MAX 32767
+
+#define NS2_MAX_PLAYER_ID 8
+
+#define NS2_MAX_INIT_RETRIES 4
+
+#define NS2_FLASH_ADDR_SERIAL 0x13002
+#define NS2_FLASH_ADDR_FACTORY_PRIMARY_CALIB 0x130a8
+#define NS2_FLASH_ADDR_FACTORY_SECONDARY_CALIB 0x130e8
+#define NS2_FLASH_ADDR_FACTORY_TRIGGER_CALIB 0x13140
+#define NS2_FLASH_ADDR_USER_PRIMARY_CALIB 0x1fc040
+#define NS2_FLASH_ADDR_USER_SECONDARY_CALIB 0x1fc080
+
+#define NS2_FLASH_SIZE_SERIAL 0x10
+#define NS2_FLASH_SIZE_FACTORY_AXIS_CALIB 9
+#define NS2_FLASH_SIZE_FACTORY_TRIGGER_CALIB 2
+#define NS2_FLASH_SIZE_USER_AXIS_CALIB 11
+
+#define NS2_USER_CALIB_MAGIC 0xa1b2
+
+#define NS2_FEATURE_BUTTONS BIT(0)
+#define NS2_FEATURE_ANALOG BIT(1)
+#define NS2_FEATURE_IMU BIT(2)
+#define NS2_FEATURE_MOUSE BIT(4)
+#define NS2_FEATURE_RUMBLE BIT(5)
+#define NS2_FEATURE_MAGNETO BIT(7)
+
+enum switch2_subcmd_flash {
+ NS2_SUBCMD_FLASH_READ_BLOCK = 0x01,
+ NS2_SUBCMD_FLASH_WRITE_BLOCK = 0x02,
+ NS2_SUBCMD_FLASH_ERASE_BLOCK = 0x03,
+ NS2_SUBCMD_FLASH_READ = 0x04,
+ NS2_SUBCMD_FLASH_WRITE = 0x05,
+};
+
+enum switch2_subcmd_init {
+ NS2_SUBCMD_INIT_SELECT_REPORT = 0xa,
+ NS2_SUBCMD_INIT_USB = 0xd,
+};
+
+enum switch2_subcmd_feature_select {
+ NS2_SUBCMD_FEATSEL_GET_INFO = 0x1,
+ NS2_SUBCMD_FEATSEL_SET_MASK = 0x2,
+ NS2_SUBCMD_FEATSEL_CLEAR_MASK = 0x3,
+ NS2_SUBCMD_FEATSEL_ENABLE = 0x4,
+ NS2_SUBCMD_FEATSEL_DISABLE = 0x5,
+};
+
+enum switch2_subcmd_grip {
+ NS2_SUBCMD_GRIP_GET_INFO = 0x1,
+ NS2_SUBCMD_GRIP_ENABLE_BUTTONS = 0x2,
+ NS2_SUBCMD_GRIP_GET_INFO_EXT = 0x3,
+};
+
+enum switch2_subcmd_led {
+ NS2_SUBCMD_LED_P1 = 0x1,
+ NS2_SUBCMD_LED_P2 = 0x2,
+ NS2_SUBCMD_LED_P3 = 0x3,
+ NS2_SUBCMD_LED_P4 = 0x4,
+ NS2_SUBCMD_LED_ALL_ON = 0x5,
+ NS2_SUBCMD_LED_ALL_OFF = 0x6,
+ NS2_SUBCMD_LED_PATTERN = 0x7,
+ NS2_SUBCMD_LED_BLINK = 0x8,
+};
+
+enum switch2_subcmd_fw_info {
+ NS2_SUBCMD_FW_INFO_GET = 0x1,
+};
+
+enum switch2_ctlr_type {
+ NS2_CTLR_TYPE_JCL = 0x00,
+ NS2_CTLR_TYPE_JCR = 0x01,
+ NS2_CTLR_TYPE_PRO = 0x02,
+ NS2_CTLR_TYPE_GC = 0x03,
+};
+
+enum switch2_report_id {
+ NS2_REPORT_UNIFIED = 0x05,
+ NS2_REPORT_JCL = 0x07,
+ NS2_REPORT_JCR = 0x08,
+ NS2_REPORT_PRO = 0x09,
+ NS2_REPORT_GC = 0x0a,
+};
+
+enum switch2_init_step {
+ NS2_INIT_READ_SERIAL,
+ NS2_INIT_GET_FIRMWARE_INFO,
+ NS2_INIT_READ_FACTORY_PRIMARY_CALIB,
+ NS2_INIT_READ_FACTORY_SECONDARY_CALIB,
+ NS2_INIT_READ_FACTORY_TRIGGER_CALIB,
+ NS2_INIT_READ_USER_PRIMARY_CALIB,
+ NS2_INIT_READ_USER_SECONDARY_CALIB,
+ NS2_INIT_SET_FEATURE_MASK,
+ NS2_INIT_ENABLE_FEATURES,
+ NS2_INIT_GRIP_BUTTONS,
+ NS2_INIT_REPORT_FORMAT,
+ NS2_INIT_SET_PLAYER_LEDS,
+ NS2_INIT_INPUT,
+ NS2_INIT_FINISH,
+ NS2_INIT_DONE,
+};
+
+struct switch2_version_info {
+ uint8_t major;
+ uint8_t minor;
+ uint8_t patch;
+ uint8_t ctlr_type;
+ __le32 unk;
+ int8_t dsp_major;
+ int8_t dsp_minor;
+ int8_t dsp_patch;
+ int8_t dsp_type;
+};
+
+struct switch2_axis_calibration {
+ uint16_t neutral;
+ uint16_t negative;
+ uint16_t positive;
+};
+
+struct switch2_stick_calibration {
+ struct switch2_axis_calibration x;
+ struct switch2_axis_calibration y;
+};
+
+struct switch2_controller {
+ struct hid_device *hdev;
+ struct switch2_cfg_intf *cfg;
+
+ char name[64];
+ char phys[64];
+ struct list_head entry;
+ struct mutex lock;
+
+ enum switch2_ctlr_type ctlr_type;
+ enum switch2_init_step init_step;
+ struct input_dev __rcu *input;
+ char serial[NS2_FLASH_SIZE_SERIAL + 1];
+ struct switch2_version_info version;
+
+ struct switch2_stick_calibration stick_calib[2];
+ uint8_t lt_zero;
+ uint8_t rt_zero;
+
+ uint32_t player_id;
+ struct led_classdev leds[4];
+};
+
+static DEFINE_MUTEX(switch2_controllers_lock);
+static LIST_HEAD(switch2_controllers);
+
+struct switch2_ctlr_button_mapping {
+ uint32_t code;
+ int byte;
+ uint32_t bit;
+};
+
+static const struct switch2_ctlr_button_mapping ns2_left_joycon_button_mappings[] = {
+ { BTN_DPAD_LEFT, 0, NS2_BTNL_LEFT, },
+ { BTN_DPAD_UP, 0, NS2_BTNL_UP, },
+ { BTN_DPAD_DOWN, 0, NS2_BTNL_DOWN, },
+ { BTN_DPAD_RIGHT, 0, NS2_BTNL_RIGHT, },
+ { BTN_TL, 0, NS2_BTNL_L, },
+ { BTN_TL2, 0, NS2_BTNL_ZL, },
+ { BTN_SELECT, 0, NS2_BTNL_MINUS, },
+ { BTN_THUMBL, 0, NS2_BTNL_LS, },
+ { KEY_RECORD, 1, NS2_BTN_JCL_CAPTURE, },
+ { BTN_GRIPR, 1, NS2_BTN_JCL_SL, },
+ { BTN_GRIPR2, 1, NS2_BTN_JCL_SR, },
+ { BTN_GRIPL, 1, NS2_BTN_JCL_GL, },
+ { /* sentinel */ },
+};
+
+static const struct switch2_ctlr_button_mapping ns2_right_joycon_button_mappings[] = {
+ { BTN_SOUTH, 0, NS2_BTNR_A, },
+ { BTN_EAST, 0, NS2_BTNR_B, },
+ { BTN_NORTH, 0, NS2_BTNR_X, },
+ { BTN_WEST, 0, NS2_BTNR_Y, },
+ { BTN_TR, 0, NS2_BTNR_R, },
+ { BTN_TR2, 0, NS2_BTNR_ZR, },
+ { BTN_START, 0, NS2_BTNR_PLUS, },
+ { BTN_THUMBR, 0, NS2_BTNR_RS, },
+ { BTN_C, 1, NS2_BTN_JCR_C, },
+ { BTN_MODE, 1, NS2_BTN_JCR_HOME, },
+ { BTN_GRIPL2, 1, NS2_BTN_JCR_SL, },
+ { BTN_GRIPL, 1, NS2_BTN_JCR_SR, },
+ { BTN_GRIPR, 1, NS2_BTN_JCR_GR, },
+ { /* sentinel */ },
+};
+
+static const struct switch2_ctlr_button_mapping ns2_procon_mappings[] = {
+ { BTN_SOUTH, 0, NS2_BTNR_A, },
+ { BTN_EAST, 0, NS2_BTNR_B, },
+ { BTN_NORTH, 0, NS2_BTNR_X, },
+ { BTN_WEST, 0, NS2_BTNR_Y, },
+ { BTN_TL, 1, NS2_BTNL_L, },
+ { BTN_TR, 0, NS2_BTNR_R, },
+ { BTN_TL2, 1, NS2_BTNL_ZL, },
+ { BTN_TR2, 0, NS2_BTNR_ZR, },
+ { BTN_SELECT, 1, NS2_BTNL_MINUS, },
+ { BTN_START, 0, NS2_BTNR_PLUS, },
+ { BTN_THUMBL, 1, NS2_BTNL_LS, },
+ { BTN_THUMBR, 0, NS2_BTNR_RS, },
+ { BTN_MODE, 2, NS2_BTN_PRO_HOME },
+ { KEY_RECORD, 2, NS2_BTN_PRO_CAPTURE },
+ { BTN_GRIPR, 2, NS2_BTN_PRO_GR },
+ { BTN_GRIPL, 2, NS2_BTN_PRO_GL },
+ { BTN_C, 2, NS2_BTN_PRO_C },
+ { /* sentinel */ },
+};
+
+static const struct switch2_ctlr_button_mapping ns2_gccon_mappings[] = {
+ { BTN_SOUTH, 0, NS2_BTNR_A, },
+ { BTN_EAST, 0, NS2_BTNR_B, },
+ { BTN_NORTH, 0, NS2_BTNR_X, },
+ { BTN_WEST, 0, NS2_BTNR_Y, },
+ { BTN_TL2, 1, NS2_BTNL_L, },
+ { BTN_TR2, 0, NS2_BTNR_R, },
+ { BTN_TL, 1, NS2_BTNL_ZL, },
+ { BTN_TR, 0, NS2_BTNR_ZR, },
+ { BTN_SELECT, 1, NS2_BTNL_MINUS, },
+ { BTN_START, 0, NS2_BTNR_PLUS, },
+ { BTN_MODE, 2, NS2_BTN_GC_HOME },
+ { KEY_RECORD, 2, NS2_BTN_GC_CAPTURE },
+ { BTN_C, 2, NS2_BTN_GC_C },
+ { /* sentinel */ },
+};
+
+static const uint8_t switch2_init_cmd_data[] = {
+ /*
+ * The last 6 bytes of this packet are the MAC address of
+ * the console, but we don't need that for USB
+ */
+ 0x01, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
+};
+
+static const uint8_t switch2_one_data[] = { 0x01, 0x00, 0x00, 0x00 };
+
+static const uint8_t switch2_feature_mask[] = {
+ NS2_FEATURE_BUTTONS | NS2_FEATURE_ANALOG | NS2_FEATURE_IMU,
+ 0x00, 0x00, 0x00
+};
+
+static void switch2_init_step_done(struct switch2_controller *ns2, enum switch2_init_step step)
+{
+ if (ns2->init_step != step)
+ return;
+
+ ns2->init_step++;
+}
+
+static inline bool switch2_ctlr_is_joycon(enum switch2_ctlr_type type)
+{
+ return type == NS2_CTLR_TYPE_JCL || type == NS2_CTLR_TYPE_JCR;
+}
+
+static int switch2_set_leds(struct switch2_controller *ns2)
+{
+ int i;
+ uint8_t message[8] = { 0 };
+
+ for (i = 0; i < JC_NUM_LEDS; i++)
+ message[0] |= (!!ns2->leds[i].brightness) << i;
+
+ if (!ns2->cfg)
+ return -ENOTCONN;
+ return ns2->cfg->send_command(NS2_CMD_LED, NS2_SUBCMD_LED_PATTERN,
+ &message, sizeof(message),
+ ns2->cfg);
+}
+
+static int switch2_player_led_brightness_set(struct led_classdev *led,
+ enum led_brightness brightness)
+{
+ struct device *dev = led->dev->parent;
+ struct hid_device *hdev = to_hid_device(dev);
+ struct switch2_controller *ns2 = hid_get_drvdata(hdev);
+
+ if (!ns2)
+ return -ENODEV;
+
+ guard(mutex)(&ns2->lock);
+ return switch2_set_leds(ns2);
+}
+
+static void switch2_leds_create(struct switch2_controller *ns2)
+{
+ struct hid_device *hdev = ns2->hdev;
+ struct led_classdev *led;
+ int i;
+ int player_led_pattern;
+
+ player_led_pattern = ns2->player_id % JC_NUM_LED_PATTERNS;
+ hid_dbg(hdev, "assigned player %d led pattern", player_led_pattern + 1);
+
+ for (i = 0; i < JC_NUM_LEDS; i++) {
+ led = &ns2->leds[i];
+ led->brightness = joycon_player_led_patterns[player_led_pattern][i];
+ led->max_brightness = 1;
+ led->brightness_set_blocking = switch2_player_led_brightness_set;
+ led->flags = LED_CORE_SUSPENDRESUME | LED_HW_PLUGGABLE;
+ }
+}
+
+static void switch2_config_buttons(struct input_dev *idev,
+ const struct switch2_ctlr_button_mapping button_mappings[])
+{
+ const struct switch2_ctlr_button_mapping *button;
+
+ for (button = button_mappings; button->code; button++)
+ input_set_capability(idev, EV_KEY, button->code);
+}
+
+static int switch2_init_input(struct switch2_controller *ns2)
+{
+ struct input_dev *input;
+ struct hid_device *hdev = ns2->hdev;
+ int i;
+ int ret;
+
+ switch2_init_step_done(ns2, NS2_INIT_FINISH);
+
+ rcu_read_lock();
+ input = rcu_dereference(ns2->input);
+ rcu_read_unlock();
+
+ if (input)
+ return 0;
+
+ input = devm_input_allocate_device(&hdev->dev);
+ if (!input)
+ return -ENOMEM;
+
+ input_set_drvdata(input, ns2);
+ input->dev.parent = &hdev->dev;
+ input->id.bustype = hdev->bus;
+ input->id.vendor = hdev->vendor;
+ input->id.product = hdev->product;
+ input->id.version = hdev->version;
+ input->uniq = ns2->serial;
+ input->name = ns2->name;
+ input->phys = hdev->phys;
+
+ switch (ns2->ctlr_type) {
+ case NS2_CTLR_TYPE_JCL:
+ input_set_abs_params(input, ABS_X, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ input_set_abs_params(input, ABS_Y, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ switch2_config_buttons(input, ns2_left_joycon_button_mappings);
+ break;
+ case NS2_CTLR_TYPE_JCR:
+ input_set_abs_params(input, ABS_X, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ input_set_abs_params(input, ABS_Y, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ switch2_config_buttons(input, ns2_right_joycon_button_mappings);
+ break;
+ case NS2_CTLR_TYPE_GC:
+ input_set_abs_params(input, ABS_X, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ input_set_abs_params(input, ABS_Y, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ input_set_abs_params(input, ABS_RX, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ input_set_abs_params(input, ABS_RY, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ input_set_abs_params(input, ABS_Z, 0, NS2_TRIGGER_RANGE, 32, 128);
+ input_set_abs_params(input, ABS_RZ, 0, NS2_TRIGGER_RANGE, 32, 128);
+ input_set_abs_params(input, ABS_HAT0X, -1, 1, 0, 0);
+ input_set_abs_params(input, ABS_HAT0Y, -1, 1, 0, 0);
+ switch2_config_buttons(input, ns2_gccon_mappings);
+ break;
+ case NS2_CTLR_TYPE_PRO:
+ input_set_abs_params(input, ABS_X, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ input_set_abs_params(input, ABS_Y, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ input_set_abs_params(input, ABS_RX, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ input_set_abs_params(input, ABS_RY, NS2_AXIS_MIN, NS2_AXIS_MAX, 32, 128);
+ input_set_abs_params(input, ABS_HAT0X, -1, 1, 0, 0);
+ input_set_abs_params(input, ABS_HAT0Y, -1, 1, 0, 0);
+ switch2_config_buttons(input, ns2_procon_mappings);
+ break;
+ default:
+ input_free_device(input);
+ return -EINVAL;
+ }
+
+ hid_info(ns2->hdev, "Firmware version %u.%u.%u (type %i)\n", ns2->version.major,
+ ns2->version.minor, ns2->version.patch, ns2->version.ctlr_type);
+ if (ns2->version.dsp_type >= 0)
+ hid_info(ns2->hdev, "DSP version %u.%u.%u\n", ns2->version.dsp_major,
+ ns2->version.dsp_minor, ns2->version.dsp_patch);
+
+ ret = input_register_device(input);
+ if (ret < 0) {
+ hid_err(ns2->hdev, "Failed to register input; ret=%d\n", ret);
+ input_free_device(input);
+ return ret;
+ }
+
+ for (i = 0; i < JC_NUM_LEDS; i++) {
+ struct led_classdev *led = &ns2->leds[i];
+ char *name = devm_kasprintf(&input->dev, GFP_KERNEL, "%s:%s:%s",
+ dev_name(&input->dev),
+ "green",
+ joycon_player_led_names[i]);
+
+ if (!name) {
+ input_unregister_device(input);
+ return -ENOMEM;
+ }
+
+ led->name = name;
+ ret = devm_led_classdev_register(&input->dev, led);
+ if (ret < 0) {
+ dev_err(&input->dev, "Failed to register player %d LED; ret=%d\n",
+ i + 1, ret);
+ input_unregister_device(input);
+ return ret;
+ }
+ }
+
+ rcu_assign_pointer(ns2->input, input);
+ synchronize_rcu();
+ return 0;
+}
+
+static struct switch2_controller *switch2_get_controller(const char *phys)
+{
+ struct switch2_controller *ns2;
+
+ guard(mutex)(&switch2_controllers_lock);
+ list_for_each_entry(ns2, &switch2_controllers, entry) {
+ if (strncmp(ns2->phys, phys, sizeof(ns2->phys)) == 0)
+ return ns2;
+ }
+ ns2 = kzalloc(sizeof(*ns2), GFP_KERNEL);
+ if (!ns2)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&ns2->lock);
+ INIT_LIST_HEAD(&ns2->entry);
+ list_add(&ns2->entry, &switch2_controllers);
+ strscpy(ns2->phys, phys, sizeof(ns2->phys));
+ return ns2;
+}
+
+static void switch2_controller_put(struct switch2_controller *ns2)
+{
+ struct input_dev *input;
+ bool do_free;
+
+ guard(mutex)(&switch2_controllers_lock);
+ mutex_lock(&ns2->lock);
+
+ rcu_read_lock();
+ input = rcu_dereference(ns2->input);
+ rcu_read_unlock();
+
+ rcu_assign_pointer(ns2->input, NULL);
+ synchronize_rcu();
+
+ ns2->init_step = 0;
+ do_free = !ns2->hdev && !ns2->cfg;
+ mutex_unlock(&ns2->lock);
+
+ if (input)
+ input_unregister_device(input);
+
+ if (do_free) {
+ list_del_init(&ns2->entry);
+ mutex_destroy(&ns2->lock);
+ kfree(ns2);
+ }
+}
+
+static bool switch2_parse_stick_calibration(struct switch2_stick_calibration *calib,
+ const uint8_t *data)
+{
+ static const uint8_t UNCALIBRATED[9] = {
+ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
+ };
+ if (memcmp(UNCALIBRATED, data, sizeof(UNCALIBRATED)) == 0)
+ return false;
+
+ calib->x.neutral = data[0];
+ calib->x.neutral |= (data[1] & 0x0F) << 8;
+
+ calib->y.neutral = data[1] >> 4;
+ calib->y.neutral |= data[2] << 4;
+
+ calib->x.positive = data[3];
+ calib->x.positive |= (data[4] & 0x0F) << 8;
+
+ calib->y.positive = data[4] >> 4;
+ calib->y.positive |= data[5] << 4;
+
+ calib->x.negative = data[6];
+ calib->x.negative |= (data[7] & 0x0F) << 8;
+
+ calib->y.negative = data[7] >> 4;
+ calib->y.negative |= data[8] << 4;
+
+ return true;
+}
+
+static void switch2_handle_flash_read(struct switch2_controller *ns2, uint8_t size,
+ uint32_t address, const uint8_t *data)
+{
+ bool ok;
+
+ switch (address) {
+ case NS2_FLASH_ADDR_SERIAL:
+ if (size != NS2_FLASH_SIZE_SERIAL)
+ return;
+ memcpy(ns2->serial, data, size);
+ switch2_init_step_done(ns2, NS2_INIT_READ_SERIAL);
+ break;
+ case NS2_FLASH_ADDR_FACTORY_PRIMARY_CALIB:
+ if (size != NS2_FLASH_SIZE_FACTORY_AXIS_CALIB)
+ return;
+ switch2_init_step_done(ns2, NS2_INIT_READ_FACTORY_PRIMARY_CALIB);
+ ok = switch2_parse_stick_calibration(&ns2->stick_calib[0], data);
+ if (ok) {
+ hid_dbg(ns2->hdev, "Got factory primary stick calibration:\n");
+ hid_dbg(ns2->hdev, "Left max: %i, neutral: %i, right max: %i\n",
+ ns2->stick_calib[0].x.negative,
+ ns2->stick_calib[0].x.neutral,
+ ns2->stick_calib[0].x.positive);
+ hid_dbg(ns2->hdev, "Down max: %i, neutral: %i, up max: %i\n",
+ ns2->stick_calib[0].y.negative,
+ ns2->stick_calib[0].y.neutral,
+ ns2->stick_calib[0].y.positive);
+ } else {
+ hid_dbg(ns2->hdev, "Factory primary stick calibration not present\n");
+ }
+ break;
+ case NS2_FLASH_ADDR_FACTORY_SECONDARY_CALIB:
+ if (size != NS2_FLASH_SIZE_FACTORY_AXIS_CALIB)
+ return;
+ switch2_init_step_done(ns2, NS2_INIT_READ_FACTORY_SECONDARY_CALIB);
+ ok = switch2_parse_stick_calibration(&ns2->stick_calib[1], data);
+ if (ok) {
+ hid_dbg(ns2->hdev, "Got factory secondary stick calibration:\n");
+ hid_dbg(ns2->hdev, "Left max: %i, neutral: %i, right max: %i\n",
+ ns2->stick_calib[1].x.negative,
+ ns2->stick_calib[1].x.neutral,
+ ns2->stick_calib[1].x.positive);
+ hid_dbg(ns2->hdev, "Down max: %i, neutral: %i, up max: %i\n",
+ ns2->stick_calib[1].y.negative,
+ ns2->stick_calib[1].y.neutral,
+ ns2->stick_calib[1].y.positive);
+ } else {
+ hid_dbg(ns2->hdev, "Factory secondary stick calibration not present\n");
+ }
+ break;
+ case NS2_FLASH_ADDR_FACTORY_TRIGGER_CALIB:
+ if (size != NS2_FLASH_SIZE_FACTORY_TRIGGER_CALIB)
+ return;
+ switch2_init_step_done(ns2, NS2_INIT_READ_FACTORY_TRIGGER_CALIB);
+ if (data[0] != 0xFF && data[1] != 0xFF) {
+ ns2->lt_zero = data[0];
+ ns2->rt_zero = data[1];
+
+ hid_dbg(ns2->hdev, "Got factory trigger calibration:\n");
+ hid_dbg(ns2->hdev, "Left zero point: %i\n", ns2->lt_zero);
+ hid_dbg(ns2->hdev, "Right zero point: %i\n", ns2->rt_zero);
+ } else {
+ hid_dbg(ns2->hdev, "Factory trigger calibration not present\n");
+ }
+ break;
+ case NS2_FLASH_ADDR_USER_PRIMARY_CALIB:
+ if (size != NS2_FLASH_SIZE_USER_AXIS_CALIB)
+ return;
+ switch2_init_step_done(ns2, NS2_INIT_READ_USER_PRIMARY_CALIB);
+ if (__le16_to_cpu(*(__le16 *)data) != NS2_USER_CALIB_MAGIC) {
+ hid_dbg(ns2->hdev, "No user primary stick calibration present\n");
+ break;
+ }
+
+ ok = switch2_parse_stick_calibration(&ns2->stick_calib[0], &data[2]);
+ if (ok) {
+ hid_dbg(ns2->hdev, "Got user primary stick calibration:\n");
+ hid_dbg(ns2->hdev, "Left max: %i, neutral: %i, right max: %i\n",
+ ns2->stick_calib[0].x.negative,
+ ns2->stick_calib[0].x.neutral,
+ ns2->stick_calib[0].x.positive);
+ hid_dbg(ns2->hdev, "Down max: %i, neutral: %i, up max: %i\n",
+ ns2->stick_calib[0].y.negative,
+ ns2->stick_calib[0].y.neutral,
+ ns2->stick_calib[0].y.positive);
+ } else {
+ hid_dbg(ns2->hdev, "No user primary stick calibration present\n");
+ }
+ break;
+ case NS2_FLASH_ADDR_USER_SECONDARY_CALIB:
+ if (size != NS2_FLASH_SIZE_USER_AXIS_CALIB)
+ return;
+ switch2_init_step_done(ns2, NS2_INIT_READ_USER_SECONDARY_CALIB);
+ if (__le16_to_cpu(*(__le16 *)data) != NS2_USER_CALIB_MAGIC) {
+ hid_dbg(ns2->hdev, "No user secondary stick calibration present\n");
+ break;
+ }
+
+ ok = switch2_parse_stick_calibration(&ns2->stick_calib[1], &data[2]);
+ if (ok) {
+ hid_dbg(ns2->hdev, "Got user secondary stick calibration:\n");
+ hid_dbg(ns2->hdev, "Left max: %i, neutral: %i, right max: %i\n",
+ ns2->stick_calib[1].x.negative,
+ ns2->stick_calib[1].x.neutral,
+ ns2->stick_calib[1].x.positive);
+ hid_dbg(ns2->hdev, "Down max: %i, neutral: %i, up max: %i\n",
+ ns2->stick_calib[1].y.negative,
+ ns2->stick_calib[1].y.neutral,
+ ns2->stick_calib[1].y.positive);
+ } else {
+ hid_dbg(ns2->hdev, "No user secondary stick calibration present\n");
+ }
+ break;
+ }
+}
+
+static void switch2_report_buttons(struct input_dev *input, const uint8_t *bytes,
+ const struct switch2_ctlr_button_mapping button_mappings[])
+{
+ const struct switch2_ctlr_button_mapping *button;
+
+ for (button = button_mappings; button->code; button++)
+ input_report_key(input, button->code, bytes[button->byte] & button->bit);
+}
+
+static void switch2_report_axis(struct input_dev *input, struct switch2_axis_calibration *calib,
+ int axis, bool invert, int value)
+{
+ if (calib && calib->neutral && calib->negative && calib->positive) {
+ value -= calib->neutral;
+ value *= NS2_AXIS_MAX + 1;
+ if (value < 0)
+ value /= calib->negative;
+ else
+ value /= calib->positive;
+ } else {
+ value = (value - 2048) * 16;
+ }
+
+ if (invert)
+ value = -value;
+ input_report_abs(input, axis,
+ clamp(value, NS2_AXIS_MIN, NS2_AXIS_MAX));
+}
+
+static void switch2_report_stick(struct input_dev *input, struct switch2_stick_calibration *calib,
+ int x, bool invert_x, int y, bool invert_y, const uint8_t *data)
+{
+ switch2_report_axis(input, &calib->x, x, invert_x, data[0] | ((data[1] & 0x0F) << 8));
+ switch2_report_axis(input, &calib->y, y, invert_y, (data[1] >> 4) | (data[2] << 4));
+}
+
+static void switch2_report_trigger(struct input_dev *input, uint8_t zero, int abs, uint8_t data)
+{
+ int value = (NS2_TRIGGER_RANGE + 1) * (data - zero) / (232 - zero);
+
+ input_report_abs(input, abs, clamp(value, 0, NS2_TRIGGER_RANGE));
+}
+
+static int switch2_event(struct hid_device *hdev, struct hid_report *report, uint8_t *raw_data,
+ int size)
+{
+ struct switch2_controller *ns2 = hid_get_drvdata(hdev);
+ struct input_dev *input;
+
+ if (report->type != HID_INPUT_REPORT)
+ return 0;
+
+ if (size < 15)
+ return -EINVAL;
+
+ guard(rcu)();
+ input = rcu_dereference(ns2->input);
+
+ if (!input)
+ return 0;
+
+ switch (report->id) {
+ case NS2_REPORT_UNIFIED:
+ /*
+ * TODO
+ * This won't be sent unless the report type gets changed via command
+ * 03-0A, but we should support it at some point regardless.
+ */
+ break;
+ case NS2_REPORT_JCL:
+ switch2_report_stick(input, &ns2->stick_calib[0], ABS_X, false,
+ ABS_Y, true, &raw_data[6]);
+ switch2_report_buttons(input, &raw_data[3], ns2_left_joycon_button_mappings);
+ break;
+ case NS2_REPORT_JCR:
+ switch2_report_stick(input, &ns2->stick_calib[0], ABS_X, false,
+ ABS_Y, true, &raw_data[6]);
+ switch2_report_buttons(input, &raw_data[3], ns2_right_joycon_button_mappings);
+ break;
+ case NS2_REPORT_GC:
+ input_report_abs(input, ABS_HAT0X,
+ !!(raw_data[4] & NS2_BTNL_RIGHT) -
+ !!(raw_data[4] & NS2_BTNL_LEFT));
+ input_report_abs(input, ABS_HAT0Y,
+ !!(raw_data[4] & NS2_BTNL_DOWN) -
+ !!(raw_data[4] & NS2_BTNL_UP));
+ switch2_report_buttons(input, &raw_data[3], ns2_gccon_mappings);
+ switch2_report_stick(input, &ns2->stick_calib[0], ABS_X, false,
+ ABS_Y, true, &raw_data[6]);
+ switch2_report_stick(input, &ns2->stick_calib[1], ABS_RX, false,
+ ABS_RY, true, &raw_data[9]);
+ switch2_report_trigger(input, ns2->lt_zero, ABS_Z, raw_data[13]);
+ switch2_report_trigger(input, ns2->rt_zero, ABS_RZ, raw_data[14]);
+ break;
+ case NS2_REPORT_PRO:
+ input_report_abs(input, ABS_HAT0X,
+ !!(raw_data[4] & NS2_BTNL_RIGHT) -
+ !!(raw_data[4] & NS2_BTNL_LEFT));
+ input_report_abs(input, ABS_HAT0Y,
+ !!(raw_data[4] & NS2_BTNL_DOWN) -
+ !!(raw_data[4] & NS2_BTNL_UP));
+ switch2_report_buttons(input, &raw_data[3], ns2_procon_mappings);
+ switch2_report_stick(input, &ns2->stick_calib[0], ABS_X, false,
+ ABS_Y, true, &raw_data[6]);
+ switch2_report_stick(input, &ns2->stick_calib[1], ABS_RX, false,
+ ABS_RY, true, &raw_data[9]);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ input_sync(input);
+ return 0;
+}
+
+static int switch2_features_enable(struct switch2_controller *ns2, int features)
+{
+ __le32 feature_bits = __cpu_to_le32(features);
+
+ if (!ns2->cfg)
+ return -ENOTCONN;
+ return ns2->cfg->send_command(NS2_CMD_FEATSEL, NS2_SUBCMD_FEATSEL_ENABLE,
+ &feature_bits, sizeof(feature_bits),
+ ns2->cfg);
+}
+
+static int switch2_read_flash(struct switch2_controller *ns2, uint32_t address,
+ uint8_t size)
+{
+ uint8_t message[8] = { size, 0x7e };
+
+ if (!ns2->cfg)
+ return -ENOTCONN;
+ *(__le32 *)&message[4] = __cpu_to_le32(address);
+ return ns2->cfg->send_command(NS2_CMD_FLASH, NS2_SUBCMD_FLASH_READ, message,
+ sizeof(message), ns2->cfg);
+}
+
+static int switch2_set_player_id(struct switch2_controller *ns2, uint32_t player_id)
+{
+ int i;
+ int player_led_pattern = player_id % JC_NUM_LED_PATTERNS;
+
+ for (i = 0; i < JC_NUM_LEDS; i++)
+ ns2->leds[i].brightness = joycon_player_led_patterns[player_led_pattern][i];
+
+ return switch2_set_leds(ns2);
+}
+
+static int switch2_set_report_format(struct switch2_controller *ns2, enum switch2_report_id fmt)
+{
+ __le32 format_id = __cpu_to_le32(fmt);
+
+ if (!ns2->cfg)
+ return -ENOTCONN;
+ return ns2->cfg->send_command(NS2_CMD_INIT, NS2_SUBCMD_INIT_SELECT_REPORT,
+ &format_id, sizeof(format_id),
+ ns2->cfg);
+}
+
+static int switch2_init_controller(struct switch2_controller *ns2)
+{
+ if (ns2->init_step == NS2_INIT_DONE)
+ return 0;
+
+ if (!ns2->cfg)
+ return -ENOTCONN;
+
+ switch (ns2->init_step) {
+ case NS2_INIT_READ_SERIAL:
+ return switch2_read_flash(ns2, NS2_FLASH_ADDR_SERIAL,
+ NS2_FLASH_SIZE_SERIAL);
+ case NS2_INIT_GET_FIRMWARE_INFO:
+ return ns2->cfg->send_command(NS2_CMD_FW_INFO, NS2_SUBCMD_FW_INFO_GET,
+ NULL, 0, ns2->cfg);
+ case NS2_INIT_READ_FACTORY_PRIMARY_CALIB:
+ return switch2_read_flash(ns2, NS2_FLASH_ADDR_FACTORY_PRIMARY_CALIB,
+ NS2_FLASH_SIZE_FACTORY_AXIS_CALIB);
+ case NS2_INIT_READ_FACTORY_SECONDARY_CALIB:
+ if (switch2_ctlr_is_joycon(ns2->ctlr_type)) {
+ switch2_init_step_done(ns2, ns2->init_step);
+ return switch2_init_controller(ns2);
+ }
+ return switch2_read_flash(ns2, NS2_FLASH_ADDR_FACTORY_SECONDARY_CALIB,
+ NS2_FLASH_SIZE_FACTORY_AXIS_CALIB);
+ case NS2_INIT_READ_FACTORY_TRIGGER_CALIB:
+ if (ns2->ctlr_type != NS2_CTLR_TYPE_GC) {
+ switch2_init_step_done(ns2, ns2->init_step);
+ return switch2_init_controller(ns2);
+ }
+ return switch2_read_flash(ns2, NS2_FLASH_ADDR_FACTORY_TRIGGER_CALIB,
+ NS2_FLASH_SIZE_FACTORY_TRIGGER_CALIB);
+ case NS2_INIT_READ_USER_PRIMARY_CALIB:
+ return switch2_read_flash(ns2, NS2_FLASH_ADDR_USER_PRIMARY_CALIB,
+ NS2_FLASH_SIZE_USER_AXIS_CALIB);
+ case NS2_INIT_READ_USER_SECONDARY_CALIB:
+ if (switch2_ctlr_is_joycon(ns2->ctlr_type)) {
+ switch2_init_step_done(ns2, ns2->init_step);
+ return switch2_init_controller(ns2);
+ }
+ return switch2_read_flash(ns2, NS2_FLASH_ADDR_USER_SECONDARY_CALIB,
+ NS2_FLASH_SIZE_USER_AXIS_CALIB);
+ case NS2_INIT_SET_FEATURE_MASK:
+ return ns2->cfg->send_command(NS2_CMD_FEATSEL, NS2_SUBCMD_FEATSEL_SET_MASK,
+ switch2_feature_mask, sizeof(switch2_feature_mask), ns2->cfg);
+ case NS2_INIT_ENABLE_FEATURES:
+ return switch2_features_enable(ns2, NS2_FEATURE_BUTTONS | NS2_FEATURE_ANALOG);
+ case NS2_INIT_GRIP_BUTTONS:
+ if (!switch2_ctlr_is_joycon(ns2->ctlr_type)) {
+ switch2_init_step_done(ns2, ns2->init_step);
+ return switch2_init_controller(ns2);
+ }
+ return ns2->cfg->send_command(NS2_CMD_GRIP, NS2_SUBCMD_GRIP_ENABLE_BUTTONS,
+ switch2_one_data, sizeof(switch2_one_data),
+ ns2->cfg);
+ case NS2_INIT_REPORT_FORMAT:
+ switch (ns2->ctlr_type) {
+ case NS2_CTLR_TYPE_JCL:
+ return switch2_set_report_format(ns2, NS2_REPORT_JCL);
+ case NS2_CTLR_TYPE_JCR:
+ return switch2_set_report_format(ns2, NS2_REPORT_JCR);
+ case NS2_CTLR_TYPE_PRO:
+ return switch2_set_report_format(ns2, NS2_REPORT_PRO);
+ case NS2_CTLR_TYPE_GC:
+ return switch2_set_report_format(ns2, NS2_REPORT_GC);
+ default:
+ switch2_init_step_done(ns2, ns2->init_step);
+ return switch2_init_controller(ns2);
+ }
+ case NS2_INIT_SET_PLAYER_LEDS:
+ return switch2_set_player_id(ns2, ns2->player_id);
+ case NS2_INIT_INPUT:
+ return ns2->cfg->send_command(NS2_CMD_INIT, NS2_SUBCMD_INIT_USB,
+ switch2_init_cmd_data, sizeof(switch2_init_cmd_data), ns2->cfg);
+ case NS2_INIT_FINISH:
+ if (ns2->hdev)
+ return switch2_init_input(ns2);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ break;
+ }
+ return 0;
+}
+
+int switch2_receive_command(struct switch2_controller *ns2,
+ const uint8_t *message, size_t length)
+{
+ const struct switch2_cmd_header *header;
+ int ret = 0;
+
+ if (length < 8)
+ return -EINVAL;
+
+ print_hex_dump_debug("got cmd: ", DUMP_PREFIX_OFFSET, 16, 1, message, length, false);
+
+ guard(mutex)(&ns2->lock);
+
+ header = (const struct switch2_cmd_header *)message;
+ if (!(header->flags & NS2_FLAG_OK)) {
+ ret = -EIO;
+ goto exit;
+ }
+ message = &message[8];
+ switch (header->command) {
+ case NS2_CMD_FLASH:
+ if (header->subcommand == NS2_SUBCMD_FLASH_READ) {
+ uint8_t read_size;
+ uint32_t read_address;
+
+ if (length < 16) {
+ ret = -EINVAL;
+ goto exit;
+ }
+ read_size = message[0];
+ read_address = __le32_to_cpu(*(__le32 *)&message[4]);
+ if (length < read_size + 16) {
+ ret = -EINVAL;
+ goto exit;
+ }
+ switch2_handle_flash_read(ns2, read_size, read_address, &message[8]);
+ }
+ break;
+ case NS2_CMD_INIT:
+ if (header->subcommand == NS2_SUBCMD_INIT_USB)
+ switch2_init_step_done(ns2, NS2_INIT_INPUT);
+ else if (header->subcommand == NS2_SUBCMD_INIT_SELECT_REPORT)
+ switch2_init_step_done(ns2, NS2_INIT_REPORT_FORMAT);
+ break;
+ case NS2_CMD_GRIP:
+ if (header->subcommand == NS2_SUBCMD_GRIP_ENABLE_BUTTONS)
+ switch2_init_step_done(ns2, NS2_INIT_GRIP_BUTTONS);
+ break;
+ case NS2_CMD_LED:
+ if (header->subcommand == NS2_SUBCMD_LED_PATTERN)
+ switch2_init_step_done(ns2, NS2_INIT_SET_PLAYER_LEDS);
+ break;
+ case NS2_CMD_FEATSEL:
+ if (header->subcommand == NS2_SUBCMD_FEATSEL_SET_MASK)
+ switch2_init_step_done(ns2, NS2_INIT_SET_FEATURE_MASK);
+ else if (header->subcommand == NS2_SUBCMD_FEATSEL_ENABLE)
+ switch2_init_step_done(ns2, NS2_INIT_ENABLE_FEATURES);
+ break;
+ case NS2_CMD_FW_INFO:
+ if (header->subcommand == NS2_SUBCMD_FW_INFO_GET) {
+ if (length < sizeof(ns2->version)) {
+ ret = -EINVAL;
+ goto exit;
+ }
+ memcpy(&ns2->version, message, sizeof(ns2->version));
+ ns2->ctlr_type = ns2->version.ctlr_type;
+ switch2_init_step_done(ns2, NS2_INIT_GET_FIRMWARE_INFO);
+ }
+ break;
+ default:
+ break;
+ }
+
+exit:
+ if (ns2->init_step < NS2_INIT_DONE)
+ switch2_init_controller(ns2);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(switch2_receive_command);
+
+int switch2_controller_attach_cfg(const char *phys, struct switch2_cfg_intf *cfg)
+{
+ struct switch2_controller *ns2 = switch2_get_controller(phys);
+
+ if (IS_ERR(ns2))
+ return PTR_ERR(ns2);
+
+ cfg->parent = ns2;
+
+ guard(mutex)(&ns2->lock);
+ WARN_ON(ns2->cfg);
+ ns2->cfg = cfg;
+
+ if (ns2->hdev)
+ return switch2_init_controller(ns2);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(switch2_controller_attach_cfg);
+
+void switch2_controller_detach_cfg(struct switch2_controller *ns2)
+{
+ mutex_lock(&ns2->lock);
+ WARN_ON(ns2 != ns2->cfg->parent);
+ ns2->cfg = NULL;
+ mutex_unlock(&ns2->lock);
+ switch2_controller_put(ns2);
+}
+EXPORT_SYMBOL_GPL(switch2_controller_detach_cfg);
+
+static int switch2_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+ struct switch2_controller *ns2;
+ struct usb_device *udev;
+ char phys[64];
+ int ret;
+
+ if (!hid_is_usb(hdev))
+ return -ENODEV;
+
+ udev = hid_to_usb_dev(hdev);
+ if (usb_make_path(udev, phys, sizeof(phys)) < 0)
+ return -EINVAL;
+
+ ret = hid_parse(hdev);
+ if (ret) {
+ hid_err(hdev, "parse failed %d\n", ret);
+ return ret;
+ }
+
+ ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
+ if (ret) {
+ hid_err(hdev, "hw_start failed %d\n", ret);
+ return ret;
+ }
+
+ ret = hid_hw_open(hdev);
+ if (ret) {
+ hid_err(hdev, "hw_open failed %d\n", ret);
+ goto err_stop;
+ }
+
+ ns2 = switch2_get_controller(phys);
+ if (IS_ERR(ns2)) {
+ ret = PTR_ERR(ns2);
+ goto err_close;
+ }
+
+ guard(mutex)(&ns2->lock);
+ WARN_ON(ns2->hdev);
+ ns2->hdev = hdev;
+ switch (hdev->product | (hdev->vendor << 16)) {
+ default:
+ strscpy(ns2->name, hdev->name, sizeof(ns2->name));
+ break;
+ /* Some controllers have slightly wrong names so we override them */
+ case USB_DEVICE_ID_NINTENDO_NS2_JOYCONR | (USB_VENDOR_ID_NINTENDO << 16):
+ /* Missing the "2" in the name */
+ strscpy(ns2->name, "Nintendo Joy-Con 2 (R)", sizeof(ns2->name));
+ break;
+ case USB_DEVICE_ID_NINTENDO_NS2_GCCON | (USB_VENDOR_ID_NINTENDO << 16):
+ /* Has "Nintendo" in the name twice */
+ strscpy(ns2->name, "Nintendo GameCube Controller", sizeof(ns2->name));
+ break;
+ }
+
+ ns2->player_id = U32_MAX;
+ ret = ida_alloc(&nintendo_player_id_allocator, GFP_KERNEL);
+ if (ret < 0)
+ hid_warn(hdev, "Failed to allocate player ID, skipping; ret=%d\n", ret);
+ else
+ ns2->player_id = ret;
+
+ switch2_leds_create(ns2);
+
+ hid_set_drvdata(hdev, ns2);
+
+ if (ns2->cfg)
+ return switch2_init_controller(ns2);
+
+ return 0;
+
+err_close:
+ hid_hw_close(hdev);
+err_stop:
+ hid_hw_stop(hdev);
+
+ return ret;
+}
+
+static void switch2_remove(struct hid_device *hdev)
+{
+ struct switch2_controller *ns2 = hid_get_drvdata(hdev);
+
+ hid_hw_close(hdev);
+ mutex_lock(&ns2->lock);
+ WARN_ON(ns2->hdev != hdev);
+ ns2->hdev = NULL;
+ mutex_unlock(&ns2->lock);
+ ida_free(&nintendo_player_id_allocator, ns2->player_id);
+ switch2_controller_put(ns2);
+ hid_hw_stop(hdev);
+}
+
static const struct hid_device_id nintendo_hid_devices[] = {
+ /* Switch devices */
{ HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
USB_DEVICE_ID_NINTENDO_PROCON) },
{ HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
@@ -2813,10 +3934,67 @@ static const struct hid_device_id nintendo_hid_devices[] = {
USB_DEVICE_ID_NINTENDO_GENCON) },
{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
USB_DEVICE_ID_NINTENDO_N64CON) },
+ /* Switch 2 devices */
+ { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
+ USB_DEVICE_ID_NINTENDO_NS2_JOYCONL) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
+ USB_DEVICE_ID_NINTENDO_NS2_JOYCONR) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
+ USB_DEVICE_ID_NINTENDO_NS2_PROCON) },
+ { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO,
+ USB_DEVICE_ID_NINTENDO_NS2_GCCON) },
{ }
};
MODULE_DEVICE_TABLE(hid, nintendo_hid_devices);
+static bool nintendo_is_switch2(struct hid_device *hdev)
+{
+ return hdev->vendor == USB_VENDOR_ID_NINTENDO &&
+ hdev->product >= USB_DEVICE_ID_NINTENDO_NS2_JOYCONR;
+}
+
+static void nintendo_hid_remove(struct hid_device *hdev)
+{
+ if (nintendo_is_switch2(hdev))
+ switch2_remove(hdev);
+ else
+ joycon_remove(hdev);
+}
+
+static int nintendo_hid_event(struct hid_device *hdev,
+ struct hid_report *report, u8 *raw_data, int size)
+{
+ if (nintendo_is_switch2(hdev))
+ return switch2_event(hdev, report, raw_data, size);
+ else
+ return joycon_event(hdev, report, raw_data, size);
+}
+
+static int nintendo_hid_probe(struct hid_device *hdev,
+ const struct hid_device_id *id)
+{
+ if (nintendo_is_switch2(hdev))
+ return switch2_probe(hdev, id);
+ else
+ return joycon_probe(hdev, id);
+}
+
+static int nintendo_hid_resume(struct hid_device *hdev)
+{
+ if (nintendo_is_switch2(hdev))
+ return 0;
+ else
+ return joycon_resume(hdev);
+}
+
+static int nintendo_hid_suspend(struct hid_device *hdev, pm_message_t message)
+{
+ if (nintendo_is_switch2(hdev))
+ return 0;
+ else
+ return joycon_suspend(hdev, message);
+}
+
static struct hid_driver nintendo_hid_driver = {
.name = "nintendo",
.id_table = nintendo_hid_devices,
@@ -2844,4 +4022,5 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ryan McClelland <rymcclel@gmail.com>");
MODULE_AUTHOR("Emily Strickland <linux@emily.st>");
MODULE_AUTHOR("Daniel J. Ogorchock <djogorchock@gmail.com>");
+MODULE_AUTHOR("Vicki Pfau <vi@endrift.com>");
MODULE_DESCRIPTION("Driver for Nintendo Switch Controllers");
diff --git a/drivers/hid/hid-nintendo.h b/drivers/hid/hid-nintendo.h
new file mode 100644
index 000000000000..7aff22f30266
--- /dev/null
+++ b/drivers/hid/hid-nintendo.h
@@ -0,0 +1,72 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * HID driver for Nintendo Switch 2 controllers
+ *
+ * Copyright (c) 2025 Valve Software
+ *
+ * This driver is based on the following work:
+ * https://gist.github.com/shinyquagsire23/66f006b46c56216acbaac6c1e2279b64
+ * https://github.com/ndeadly/switch2_controller_research
+ */
+
+#ifndef __HID_NINTENDO_H
+#define __HID_NINTENDO_H
+
+#include <linux/bits.h>
+
+#define NS2_FLAG_OK BIT(0)
+#define NS2_FLAG_NACK BIT(2)
+
+enum switch2_cmd {
+ NS2_CMD_NFC = 0x01,
+ NS2_CMD_FLASH = 0x02,
+ NS2_CMD_INIT = 0x03,
+ NS2_CMD_GRIP = 0x08,
+ NS2_CMD_LED = 0x09,
+ NS2_CMD_VIBRATE = 0x0a,
+ NS2_CMD_BATTERY = 0x0b,
+ NS2_CMD_FEATSEL = 0x0c,
+ NS2_CMD_FW_UPD = 0x0d,
+ NS2_CMD_FW_INFO = 0x10,
+ NS2_CMD_BT_PAIR = 0x15,
+};
+
+enum switch2_direction {
+ NS2_DIR_IN = 0x00,
+ NS2_DIR_OUT = 0x90,
+};
+
+enum switch2_transport {
+ NS2_TRANS_USB = 0x00,
+ NS2_TRANS_BT = 0x01,
+};
+
+struct switch2_cmd_header {
+ uint8_t command;
+ uint8_t flags;
+ uint8_t transport;
+ uint8_t subcommand;
+ uint8_t unk1;
+ uint8_t length;
+ uint16_t unk2;
+};
+static_assert(sizeof(struct switch2_cmd_header) == 8);
+
+struct device;
+struct switch2_controller;
+struct switch2_cfg_intf {
+ struct switch2_controller *parent;
+ struct device *dev;
+
+ int (*send_command)(enum switch2_cmd command, uint8_t subcommand,
+ const void *message, size_t length,
+ struct switch2_cfg_intf *intf);
+};
+
+int switch2_controller_attach_cfg(const char *phys, struct switch2_cfg_intf *cfg);
+void switch2_controller_detach_cfg(struct switch2_controller *controller);
+
+int switch2_receive_command(struct switch2_controller *controller,
+ const uint8_t *message, size_t length);
+
+#endif
diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig
index 7755e5b454d2..868262c6ccd9 100644
--- a/drivers/input/joystick/Kconfig
+++ b/drivers/input/joystick/Kconfig
@@ -422,4 +422,15 @@ config JOYSTICK_SEESAW
To compile this driver as a module, choose M here: the module will be
called adafruit-seesaw.
+config JOYSTICK_NINTENDO_SWITCH2_USB
+ tristate "Wired Nintendo Switch 2 controller support"
+ depends on HID_NINTENDO
+ depends on USB
+ help
+ Say Y here if you want to enable support for wired Nintendo Switch 2
+ controllers.
+
+ To compile this driver as a module, choose M here: the
+ module will be called nintendo-switch2-usb.
+
endif
diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile
index 9976f596a920..8f92900ae885 100644
--- a/drivers/input/joystick/Makefile
+++ b/drivers/input/joystick/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_JOYSTICK_SIDEWINDER) += sidewinder.o
obj-$(CONFIG_JOYSTICK_SPACEBALL) += spaceball.o
obj-$(CONFIG_JOYSTICK_SPACEORB) += spaceorb.o
obj-$(CONFIG_JOYSTICK_STINGER) += stinger.o
+obj-$(CONFIG_JOYSTICK_NINTENDO_SWITCH2_USB) += nintendo-switch2-usb.o
obj-$(CONFIG_JOYSTICK_TMDC) += tmdc.o
obj-$(CONFIG_JOYSTICK_TURBOGRAFX) += turbografx.o
obj-$(CONFIG_JOYSTICK_TWIDJOY) += twidjoy.o
diff --git a/drivers/input/joystick/nintendo-switch2-usb.c b/drivers/input/joystick/nintendo-switch2-usb.c
new file mode 100644
index 000000000000..ebd89d852e21
--- /dev/null
+++ b/drivers/input/joystick/nintendo-switch2-usb.c
@@ -0,0 +1,353 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * USB driver for Nintendo Switch 2 controllers configuration interface
+ *
+ * Copyright (c) 2025 Valve Software
+ *
+ * This driver is based on the following work:
+ * https://gist.github.com/shinyquagsire23/66f006b46c56216acbaac6c1e2279b64
+ * https://github.com/ndeadly/switch2_controller_research
+ */
+
+#include "../../hid/hid-ids.h"
+#include "../../hid/hid-nintendo.h"
+#include <linux/module.h>
+#include <linux/usb/input.h>
+
+#define NS2_BULK_SIZE 64
+#define NS2_IN_URBS 2
+#define NS2_OUT_URBS 4
+
+static struct usb_driver switch2_usb;
+
+struct switch2_urb {
+ struct urb *urb;
+ uint8_t *data;
+ bool active;
+};
+
+struct switch2_usb {
+ struct switch2_cfg_intf cfg;
+ struct usb_device *udev;
+
+ struct switch2_urb bulk_in[NS2_IN_URBS];
+ struct usb_anchor bulk_in_anchor;
+ spinlock_t bulk_in_lock;
+
+ struct switch2_urb bulk_out[NS2_OUT_URBS];
+ struct usb_anchor bulk_out_anchor;
+ spinlock_t bulk_out_lock;
+
+ int message_in;
+ struct work_struct message_in_work;
+};
+
+static void switch2_bulk_in(struct urb *urb)
+{
+ struct switch2_usb *ns2_usb = urb->context;
+ int i;
+ bool schedule = false;
+ unsigned long flags;
+
+ switch (urb->status) {
+ case 0:
+ schedule = true;
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ dev_dbg(&ns2_usb->udev->dev, "shutting down input urb: %d\n", urb->status);
+ return;
+ default:
+ dev_dbg(&ns2_usb->udev->dev, "unknown input urb status: %d\n", urb->status);
+ break;
+ }
+
+ spin_lock_irqsave(&ns2_usb->bulk_in_lock, flags);
+ for (i = 0; i < NS2_IN_URBS; i++) {
+ int err;
+ struct switch2_urb *ns2_urb;
+
+ if (ns2_usb->bulk_in[i].urb == urb) {
+ ns2_usb->message_in = i;
+ continue;
+ }
+
+ if (ns2_usb->bulk_in[i].active)
+ continue;
+
+ ns2_urb = &ns2_usb->bulk_in[i];
+ usb_anchor_urb(ns2_urb->urb, &ns2_usb->bulk_in_anchor);
+ err = usb_submit_urb(ns2_urb->urb, GFP_ATOMIC);
+ if (err) {
+ usb_unanchor_urb(ns2_urb->urb);
+ dev_dbg(&ns2_usb->udev->dev, "failed to queue input urb: %d\n", err);
+ } else {
+ ns2_urb->active = true;
+ }
+ }
+ spin_unlock_irqrestore(&ns2_usb->bulk_in_lock, flags);
+
+ if (schedule)
+ schedule_work(&ns2_usb->message_in_work);
+}
+
+static void switch2_bulk_out(struct urb *urb)
+{
+ struct switch2_usb *ns2_usb = urb->context;
+ int i;
+
+ guard(spinlock_irqsave)(&ns2_usb->bulk_out_lock);
+
+ switch (urb->status) {
+ case 0:
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ dev_dbg(&ns2_usb->udev->dev, "shutting down output urb: %d\n", urb->status);
+ return;
+ default:
+ dev_dbg(&ns2_usb->udev->dev, "unknown output urb status: %d\n", urb->status);
+ return;
+ }
+
+ for (i = 0; i < NS2_OUT_URBS; i++) {
+ if (ns2_usb->bulk_out[i].urb != urb)
+ continue;
+
+ ns2_usb->bulk_out[i].active = false;
+ break;
+ }
+}
+
+static int switch2_usb_send_cmd(enum switch2_cmd command, uint8_t subcommand,
+ const void *message, size_t size, struct switch2_cfg_intf *cfg)
+{
+ struct switch2_usb *ns2_usb = (struct switch2_usb *)cfg;
+ struct switch2_urb *urb = NULL;
+ int i;
+ int ret;
+ unsigned long flags;
+
+ struct switch2_cmd_header header = {
+ command, NS2_DIR_OUT | NS2_FLAG_OK, NS2_TRANS_USB, subcommand, 0, size
+ };
+
+ if (WARN_ON(size > 56))
+ return -EINVAL;
+
+ spin_lock_irqsave(&ns2_usb->bulk_out_lock, flags);
+ for (i = 0; i < NS2_OUT_URBS; i++) {
+ if (ns2_usb->bulk_out[i].active)
+ continue;
+
+ urb = &ns2_usb->bulk_out[i];
+ urb->active = true;
+ break;
+ }
+ spin_unlock_irqrestore(&ns2_usb->bulk_out_lock, flags);
+
+ if (!urb) {
+ dev_warn(&ns2_usb->udev->dev, "output queue full, dropping message\n");
+ return -ENOBUFS;
+ }
+
+ memcpy(urb->data, &header, sizeof(header));
+ if (message && size)
+ memcpy(&urb->data[8], message, size);
+ urb->urb->transfer_buffer_length = size + sizeof(header);
+
+ print_hex_dump_debug("sending cmd: ", DUMP_PREFIX_OFFSET, 16, 1, urb->data,
+ size + sizeof(header), false);
+
+ usb_anchor_urb(urb->urb, &ns2_usb->bulk_out_anchor);
+ ret = usb_submit_urb(urb->urb, GFP_ATOMIC);
+ if (ret) {
+ if (ret != -ENODEV)
+ dev_warn(&ns2_usb->udev->dev, "failed to submit output urb: %i", ret);
+ urb->active = false;
+ usb_unanchor_urb(urb->urb);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void switch2_usb_message_in_work(struct work_struct *work)
+{
+ struct switch2_usb *ns2_usb = container_of(work, struct switch2_usb, message_in_work);
+ struct switch2_urb *urb;
+ int err;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ns2_usb->bulk_in_lock, flags);
+ urb = &ns2_usb->bulk_in[ns2_usb->message_in];
+ spin_unlock_irqrestore(&ns2_usb->bulk_in_lock, flags);
+
+ err = switch2_receive_command(ns2_usb->cfg.parent, urb->urb->transfer_buffer,
+ urb->urb->actual_length);
+ if (err)
+ dev_dbg(&ns2_usb->udev->dev, "receive command failed: %d\n", err);
+
+ spin_lock_irqsave(&ns2_usb->bulk_in_lock, flags);
+ urb->active = false;
+ spin_unlock_irqrestore(&ns2_usb->bulk_in_lock, flags);
+}
+
+static int switch2_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+ struct switch2_usb *ns2_usb;
+ struct usb_device *udev;
+ struct usb_endpoint_descriptor *bulk_in, *bulk_out;
+ char phys[64];
+ int ret;
+ int i;
+
+ udev = interface_to_usbdev(intf);
+ if (usb_make_path(udev, phys, sizeof(phys)) < 0)
+ return -EINVAL;
+
+ ret = usb_find_common_endpoints(intf->cur_altsetting, &bulk_in, &bulk_out, NULL, NULL);
+ if (ret) {
+ dev_err(&intf->dev, "failed to find bulk EPs\n");
+ return ret;
+ }
+
+ ns2_usb = devm_kzalloc(&intf->dev, sizeof(*ns2_usb), GFP_KERNEL);
+ if (!ns2_usb)
+ return -ENOMEM;
+
+ ns2_usb->udev = udev;
+ for (i = 0; i < NS2_IN_URBS; i++) {
+ ns2_usb->bulk_in[i].urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!ns2_usb->bulk_in[i].urb) {
+ ret = -ENOMEM;
+ goto err_free_in;
+ }
+
+ ns2_usb->bulk_in[i].data = usb_alloc_coherent(udev, NS2_BULK_SIZE, GFP_KERNEL,
+ &ns2_usb->bulk_in[i].urb->transfer_dma);
+ if (!ns2_usb->bulk_in[i].data) {
+ ret = -ENOMEM;
+ goto err_free_in;
+ }
+
+ usb_fill_bulk_urb(ns2_usb->bulk_in[i].urb, udev,
+ usb_rcvbulkpipe(udev, bulk_in->bEndpointAddress),
+ ns2_usb->bulk_in[i].data, NS2_BULK_SIZE, switch2_bulk_in, ns2_usb);
+ ns2_usb->bulk_in[i].urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ }
+
+ for (i = 0; i < NS2_OUT_URBS; i++) {
+ ns2_usb->bulk_out[i].urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!ns2_usb->bulk_out[i].urb) {
+ ret = -ENOMEM;
+ goto err_free_out;
+ }
+
+ ns2_usb->bulk_out[i].data = usb_alloc_coherent(udev, NS2_BULK_SIZE, GFP_KERNEL,
+ &ns2_usb->bulk_out[i].urb->transfer_dma);
+ if (!ns2_usb->bulk_out[i].data) {
+ ret = -ENOMEM;
+ goto err_free_out;
+ }
+
+ usb_fill_bulk_urb(ns2_usb->bulk_out[i].urb, udev,
+ usb_sndbulkpipe(udev, bulk_out->bEndpointAddress),
+ ns2_usb->bulk_out[i].data, NS2_BULK_SIZE, switch2_bulk_out, ns2_usb);
+ ns2_usb->bulk_out[i].urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ }
+
+ ns2_usb->bulk_in[0].active = true;
+ ret = usb_submit_urb(ns2_usb->bulk_in[0].urb, GFP_ATOMIC);
+ if (ret < 0)
+ goto err_free_out;
+
+ init_usb_anchor(&ns2_usb->bulk_out_anchor);
+ spin_lock_init(&ns2_usb->bulk_out_lock);
+ init_usb_anchor(&ns2_usb->bulk_in_anchor);
+ spin_lock_init(&ns2_usb->bulk_in_lock);
+ INIT_WORK(&ns2_usb->message_in_work, switch2_usb_message_in_work);
+
+ usb_set_intfdata(intf, ns2_usb);
+
+ ns2_usb->cfg.dev = &ns2_usb->udev->dev;
+ ns2_usb->cfg.send_command = switch2_usb_send_cmd;
+
+ ret = switch2_controller_attach_cfg(phys, &ns2_usb->cfg);
+ if (ret < 0)
+ goto err_kill_urb;
+
+ return 0;
+
+err_kill_urb:
+ usb_kill_urb(ns2_usb->bulk_in[0].urb);
+err_free_out:
+ for (i = 0; i < NS2_OUT_URBS; i++) {
+ usb_free_coherent(ns2_usb->udev, NS2_BULK_SIZE, ns2_usb->bulk_out[i].data,
+ ns2_usb->bulk_out[i].urb->transfer_dma);
+ usb_free_urb(ns2_usb->bulk_out[i].urb);
+ }
+err_free_in:
+ for (i = 0; i < NS2_IN_URBS; i++) {
+ usb_free_coherent(ns2_usb->udev, NS2_BULK_SIZE, ns2_usb->bulk_in[i].data,
+ ns2_usb->bulk_in[i].urb->transfer_dma);
+ usb_free_urb(ns2_usb->bulk_in[i].urb);
+ }
+ devm_kfree(&intf->dev, ns2_usb);
+
+ return ret;
+}
+
+static void switch2_usb_disconnect(struct usb_interface *intf)
+{
+ struct switch2_usb *ns2_usb = usb_get_intfdata(intf);
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&ns2_usb->bulk_out_lock, flags);
+ usb_kill_anchored_urbs(&ns2_usb->bulk_out_anchor);
+ for (i = 0; i < NS2_OUT_URBS; i++) {
+ usb_free_coherent(ns2_usb->udev, NS2_BULK_SIZE, ns2_usb->bulk_out[i].data,
+ ns2_usb->bulk_out[i].urb->transfer_dma);
+ usb_free_urb(ns2_usb->bulk_out[i].urb);
+ }
+ spin_unlock_irqrestore(&ns2_usb->bulk_out_lock, flags);
+
+ spin_lock_irqsave(&ns2_usb->bulk_in_lock, flags);
+ usb_kill_anchored_urbs(&ns2_usb->bulk_in_anchor);
+ cancel_work_sync(&ns2_usb->message_in_work);
+ for (i = 0; i < NS2_IN_URBS; i++) {
+ usb_free_coherent(ns2_usb->udev, NS2_BULK_SIZE, ns2_usb->bulk_in[i].data,
+ ns2_usb->bulk_in[i].urb->transfer_dma);
+ usb_free_urb(ns2_usb->bulk_in[i].urb);
+ }
+ spin_unlock_irqrestore(&ns2_usb->bulk_in_lock, flags);
+
+ switch2_controller_detach_cfg(ns2_usb->cfg.parent);
+}
+
+#define SWITCH2_CONTROLLER(vend, prod) \
+ USB_DEVICE_AND_INTERFACE_INFO(vend, prod, USB_CLASS_VENDOR_SPEC, 0, 0)
+
+static const struct usb_device_id switch2_usb_devices[] = {
+ { SWITCH2_CONTROLLER(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_NS2_JOYCONL) },
+ { SWITCH2_CONTROLLER(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_NS2_JOYCONR) },
+ { SWITCH2_CONTROLLER(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_NS2_PROCON) },
+ { SWITCH2_CONTROLLER(USB_VENDOR_ID_NINTENDO, USB_DEVICE_ID_NINTENDO_NS2_GCCON) },
+ { }
+};
+MODULE_DEVICE_TABLE(usb, switch2_usb_devices);
+
+static struct usb_driver switch2_usb = {
+ .name = "switch2",
+ .id_table = switch2_usb_devices,
+ .probe = switch2_usb_probe,
+ .disconnect = switch2_usb_disconnect,
+};
+module_usb_driver(switch2_usb);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Vicki Pfau <vi@endrift.com>");
+MODULE_DESCRIPTION("Driver for Nintendo Switch 2 Controllers");
--
2.54.0
^ permalink raw reply related
* [PATCH v5 0/3] HID: nintendo: Add preliminary Switch 2 controller driver
From: Vicki Pfau @ 2026-05-12 20:00 UTC (permalink / raw)
To: Dmitry Torokhov, Jiri Kosina, Benjamin Tissoires, linux-input; +Cc: Vicki Pfau
This series adds preliminary support for Switch 2 controllers using the
same split-driver model as previous versions. This is a minor iteration on
v4, fixing some leaked input_dev objects in error paths as well as fixing a
merge/rebase error when CONFIG_PM ifdefs got removed in 7.0.
Vicki Pfau (3):
HID: nintendo: Add preliminary Switch 2 controller driver
HID: nintendo: Add rumble support for Switch 2 controllers
HID: nintendo: Add unified report format support
MAINTAINERS | 1 +
drivers/hid/Kconfig | 19 +-
drivers/hid/hid-ids.h | 4 +
drivers/hid/hid-nintendo.c | 1504 ++++++++++++++++-
drivers/hid/hid-nintendo.h | 72 +
drivers/input/joystick/Kconfig | 11 +
drivers/input/joystick/Makefile | 1 +
drivers/input/joystick/nintendo-switch2-usb.c | 353 ++++
8 files changed, 1951 insertions(+), 14 deletions(-)
create mode 100644 drivers/hid/hid-nintendo.h
create mode 100644 drivers/input/joystick/nintendo-switch2-usb.c
--
2.54.0
^ permalink raw reply
* Re: [PATCH v4 0/3] HID: nintendo: Add preliminary Switch 2 controller driver
From: Vicki Pfau @ 2026-05-12 19:49 UTC (permalink / raw)
To: Jiri Kosina; +Cc: Dmitry Torokhov, Benjamin Tissoires, linux-input
In-Reply-To: <rqposs64-2nnp-5552-nqp3-o45q11328o97@xreary.bet>
On 5/12/26 8:43 AM, Jiri Kosina wrote:
> On Wed, 15 Apr 2026, Vicki Pfau wrote:
>
>> This series adds preliminary support for Switch 2 controllers using the
>> same split-driver model as previous versions. This is a minor iteration on
>> v3 (which was erroneously submitted as v2 again), fixing an issue where we
>> checked for NULL instead of handling an ERR_PTR, as well as a few typo
>> fixes.
>>
>> Vicki Pfau (3):
>> HID: nintendo: Add preliminary Switch 2 controller driver
>> HID: nintendo: Add rumble support for Switch 2 controllers
>> HID: nintendo: Add unified report format support
>
> Vicki,
>
> are you planning v5 with Silvan's comment addressed, please?
Yes, sorry. I was on vacation last week and have had my priorities shifted at work since I got back. I have something else I noticed that needs fixing too. I'll try to get the new version out today.
>
> Thanks,
>
^ permalink raw reply
* [PATCH v2] HID: magicmouse: fix battery reporting for 2024 Magic Trackpad USB-C
From: Dmitri Ollari @ 2026-05-12 19:36 UTC (permalink / raw)
To: linux-input; +Cc: jikos, Dmitri Ollari
In-Reply-To: <20260411163806.35759-1-dmitri.ollari@protonmail.com>
The 2024 Magic Trackpad USB-C (PID 0x0324) does not report battery
strength via HID descriptor fields over Bluetooth. Instead it requires
an explicit HID_REQ_GET_REPORT request to retrieve the battery level.
Replace the battery_timer (timer_list) with battery_work (delayed_work)
so that HID_REQ_GET_REPORT can be issued from a sleepable context.
Timers run in atomic context and cannot block, which caused deadlocks
on the Bluetooth transport path.
Extend the fetch guard and probe scheduling block to include the 2024
Magic Trackpad USB-C when connected over Bluetooth.
Schedule battery_work immediately at probe (delay=0) instead of
issuing a direct magicmouse_fetch_battery() call. The direct call
bypassed the cold-start correction logic and could publish a stale
value before the work handler had a chance to validate it.
Add a cold-start double-poll: the device may return a stale battery
value (e.g. 4%) on the very first GET_REPORT after power-on. On the
first successful poll battery_validated is set and a second poll is
scheduled 3 seconds later to obtain the real value. Subsequent polls
use the normal 60-second interval.
Remove the early-return guard that skipped polling when
battery_capacity equalled battery_max. This prevented the second
corrective poll from firing when the first stale response happened
to equal 100.
Signed-off-by: Dmitri Ollari <dmitri.ollari@protonmail.com>
---
v2:
- Rebased onto v7.1-rc3
- Fixed email line-wrapping and whitespace damage
- Removed PGP signing
drivers/hid/hid-magicmouse.c | 57 ++++++++++++++++++++++--------------
1 file changed, 35 insertions(+), 22 deletions(-)
diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
index e70bd3dc07ab..1d7c84ecadbb 100644
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -123,7 +123,10 @@ MODULE_PARM_DESC(report_undeciphered, "Report undeciphered multi-touch state fie
* @tracking_ids: Mapping of current touch input data to @touches.
* @hdev: Pointer to the underlying HID device.
* @work: Workqueue to handle initialization retry for quirky devices.
- * @battery_timer: Timer for obtaining battery level information.
+ * @battery_work: Delayed work for periodic battery level polling.
+ * @battery_validated: Set after the first successful poll; gates the
+ * second poll that corrects the stale value the device may report
+ * on cold start.
*/
struct magicmouse_sc {
struct input_dev *input;
@@ -148,7 +151,8 @@ struct magicmouse_sc {
struct hid_device *hdev;
struct delayed_work work;
- struct timer_list battery_timer;
+ struct delayed_work battery_work;
+ bool battery_validated;
};
static int magicmouse_firm_touch(struct magicmouse_sc *msc)
@@ -822,7 +826,8 @@ static int magicmouse_fetch_battery(struct hid_device *hdev)
bat = hid_get_battery(hdev);
if (!bat ||
(!is_usb_magicmouse2(hdev->vendor, hdev->product) &&
- !is_usb_magictrackpad2(hdev->vendor, hdev->product)))
+ !is_usb_magictrackpad2(hdev->vendor, hdev->product) &&
+ hdev->product != USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC))
return -1;
report_enum = &hdev->report_enum[bat->report_type];
@@ -831,9 +836,6 @@ static int magicmouse_fetch_battery(struct hid_device *hdev)
if (!report || report->maxfield < 1)
return -1;
- if (bat->capacity == bat->max)
- return -1;
-
hid_hw_request(hdev, report, HID_REQ_GET_REPORT);
return 0;
#else
@@ -841,14 +843,25 @@ static int magicmouse_fetch_battery(struct hid_device *hdev)
#endif
}
-static void magicmouse_battery_timer_tick(struct timer_list *t)
+static void magicmouse_battery_work(struct work_struct *work)
{
- struct magicmouse_sc *msc = timer_container_of(msc, t, battery_timer);
+ struct magicmouse_sc *msc = container_of(work, struct magicmouse_sc, battery_work.work);
struct hid_device *hdev = msc->hdev;
if (magicmouse_fetch_battery(hdev) == 0) {
- mod_timer(&msc->battery_timer,
- jiffies + secs_to_jiffies(USB_BATTERY_TIMEOUT_SEC));
+ if (!msc->battery_validated) {
+ /*
+ * The device may return a stale value (e.g. 4%) on the
+ * first GET_REPORT after cold start. Schedule a second
+ * poll shortly after to get the real value, then settle
+ * into the normal 60s interval.
+ */
+ msc->battery_validated = true;
+ schedule_delayed_work(&msc->battery_work, secs_to_jiffies(3));
+ } else {
+ schedule_delayed_work(&msc->battery_work,
+ secs_to_jiffies(USB_BATTERY_TIMEOUT_SEC));
+ }
}
}
@@ -868,6 +881,7 @@ static int magicmouse_probe(struct hid_device *hdev,
msc->scroll_accel = SCROLL_ACCEL_DEFAULT;
msc->hdev = hdev;
INIT_DEFERRABLE_WORK(&msc->work, magicmouse_enable_mt_work);
+ INIT_DELAYED_WORK(&msc->battery_work, magicmouse_battery_work);
msc->quirks = id->driver_data;
hid_set_drvdata(hdev, msc);
@@ -885,11 +899,15 @@ static int magicmouse_probe(struct hid_device *hdev,
}
if (is_usb_magicmouse2(id->vendor, id->product) ||
- is_usb_magictrackpad2(id->vendor, id->product)) {
- timer_setup(&msc->battery_timer, magicmouse_battery_timer_tick, 0);
- mod_timer(&msc->battery_timer,
- jiffies + secs_to_jiffies(USB_BATTERY_TIMEOUT_SEC));
- magicmouse_fetch_battery(hdev);
+ is_usb_magictrackpad2(id->vendor, id->product) ||
+ id->product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD2_USBC) {
+ /*
+ * Schedule immediately so battery_work runs ASAP, sets
+ * battery_validated, then reschedules every 60s. Avoids
+ * direct fetch which bypasses battery_validated and would
+ * publish a stale startup value.
+ */
+ schedule_delayed_work(&msc->battery_work, 0);
}
if (is_usb_magicmouse2(id->vendor, id->product) ||
@@ -957,10 +975,7 @@ static int magicmouse_probe(struct hid_device *hdev,
return 0;
err_stop_hw:
- if (is_usb_magicmouse2(id->vendor, id->product) ||
- is_usb_magictrackpad2(id->vendor, id->product))
- timer_delete_sync(&msc->battery_timer);
-
+ cancel_delayed_work_sync(&msc->battery_work);
hid_hw_stop(hdev);
return ret;
}
@@ -971,9 +986,7 @@ static void magicmouse_remove(struct hid_device *hdev)
if (msc) {
cancel_delayed_work_sync(&msc->work);
- if (is_usb_magicmouse2(hdev->vendor, hdev->product) ||
- is_usb_magictrackpad2(hdev->vendor, hdev->product))
- timer_delete_sync(&msc->battery_timer);
+ cancel_delayed_work_sync(&msc->battery_work);
}
hid_hw_stop(hdev);
--
2.54.0
^ permalink raw reply related
* Re: [PATCH v1] Input: atlas - Check ACPI_COMPANION() against NULL
From: Dmitry Torokhov @ 2026-05-12 17:57 UTC (permalink / raw)
To: Rafael J. Wysocki; +Cc: linux-input, LKML, Linux ACPI, Andy Shevchenko
In-Reply-To: <8696590.T7Z3S40VBb@rafael.j.wysocki>
On Tue, May 12, 2026 at 06:26:54PM +0200, Rafael J. Wysocki wrote:
> From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
>
> Every platform driver can be forced to match a device that doesn't match
> its list of device IDs because of device_match_driver_override(), so
> platform drivers that rely on the existence of a device's ACPI companion
> object need to verify its presence.
>
> Accordingly, add a requisite ACPI_COMPANION() check against NULL to the
> atlas_btns driver.
>
> Fixes: b8303880b641 ("Input: atlas - convert ACPI driver to a platform one")
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Applied, thank you.
--
Dmitry
^ permalink raw reply
* Re: [PATCH 0/4] Add MSI Claw HID Configuration Driver
From: Derek John Clark @ 2026-05-12 17:54 UTC (permalink / raw)
To: Jiri Kosina
Cc: Benjamin Tissoires, Pierre-Loup A . Griffais, Denis Benato,
Zhouwang Huang, linux-input, linux-doc, linux-kernel
In-Reply-To: <n533qs94-7o4r-p5r0-04p1-68q1398n5785@xreary.bet>
On Tue, May 12, 2026 at 9:13 AM Jiri Kosina <jikos@kernel.org> wrote:
>
> On Sun, 10 May 2026, Derek J. Clark wrote:
>
> > This series adds and HID Configuration driver for the MSI Claw line of
> > Handheld Gaming PC's. The MSI Claw HID interface provides multiple
> > features, such as the ability to switch between xinput, dinput, and a
> > desktop mode, RGB control, rumble intensity, and mapping of the rear "M"
> > keys. There are additional gamepad modes that are not included in this
> > driver as they appear to be used in assembly line testing or are
> > incomplete in the firmware. During my testing I found them to be unstable.
> >
> > The initial version of this driver was written by Denis Benato, which
> > contained the initial reverse-engineering and implementation for the
> > gamepad mode switching. This work was later expanded by Zhouwang Huang
> > to include more gamepad modes and additional features. Finally, I
> > refactored the entire driver, fixed multiple bugs, and refined the overall
> > format to conform to kernel driver best practices and style guide.
> >
> > Claude was used initially by Zhouwang Huang to quickly parse HID captures
> > during the reverse-engineering of some of the features. Since Claude had
> > already been used, as a test of its capabilities I had it implement the
> > rumble intensity attribute after I had already rewritten most of the
> > driver, which I then manually edited to fix some mistakes. I also used
> > Claude to review the driver and these patches for any mistakes and bugs.
> >
> > Assisted-by: Claude:claude-sonnet-4-6
> > Co-developed-by: Denis Benato <denis.benato@linux.dev>
> > Signed-off-by: Denis Benato <denis.benato@linux.dev>
> > Co-developed-by: Zhouwang Huang <honjow311@gmail.com>
> > Signed-off-by: Zhouwang Huang <honjow311@gmail.com>
> > Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
> >
> > Derek J. Clark (4):
> > HID: hid-msi-claw: Add MSI Claw configuration driver
> > HID: hid-msi-claw: Add M-key mapping attributes
> > HID: hid-msi-claw: Add RGB control interface
> > HID: hid-msi-claw: Add Rumble Intensity Attributes
>
> The driver looks reasonable, I'd just like to propose that we name it just
> hid-msi to follow the usual HID subsystem driver naming standards, so that
> it can later be extended with supporting other MSI devices.
>
Hi Jiri,
Sounds good. I'll do that when I fix the issues flagged by the bot in
v2 and I'll try to have it out some time this week.
Thanks,
Derek
Thanks
> Thanks,
>
> --
> Jiri Kosina
> SUSE Labs
>
^ permalink raw reply
* Re: [PATCH] amd-sfh-hid: tablet mode switch and asus quirk
From: Basavaraj Natikar @ 2026-05-12 17:09 UTC (permalink / raw)
To: Jiri Kosina, Helge Bahmann
Cc: Nehal Bakulchandra Shah, Sandeep Singh, Basavaraj Natikar,
bentiss, linux-hid, linux-input
In-Reply-To: <n0s5q66s-p747-612p-o743-pqr0q2r79448@xreary.bet>
On 5/12/2026 9:36 PM, Jiri Kosina wrote:
> On Mon, 27 Apr 2026, Helge Bahmann wrote:
>
>> Add an input driver that interprets the "operation mode" sensor offered
>> by the amd sfh on some laptop models.
>>
>> Add a quirk to make the driver work again with the Asus VivoBook
>> VivoBook (turn off the "disable interrupts" flag).
>>
>> Expose the intr_disable flag as a module parameter in case it turns out
>> to be needed on further laptop models.
>>
>> Signed-off-by: Helge Bahmann <hcb@chaoticmind.net>
> Basavaraj, can you please review this one?
Hi Jiri,
Sure, will review. The patch has some changes that deviate from how
other sensors are exposed in this driver, so it will take some time to
review properly. I'll respond with detailed feedback once done.
Thanks,
--
Basavaraj
^ permalink raw reply
* [PATCH v1] Input: atlas - Check ACPI_COMPANION() against NULL
From: Rafael J. Wysocki @ 2026-05-12 16:26 UTC (permalink / raw)
To: Dmitry Torokhov; +Cc: linux-input, LKML, Linux ACPI, Andy Shevchenko
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Every platform driver can be forced to match a device that doesn't match
its list of device IDs because of device_match_driver_override(), so
platform drivers that rely on the existence of a device's ACPI companion
object need to verify its presence.
Accordingly, add a requisite ACPI_COMPANION() check against NULL to the
atlas_btns driver.
Fixes: b8303880b641 ("Input: atlas - convert ACPI driver to a platform one")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/input/misc/atlas_btns.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/input/misc/atlas_btns.c
+++ b/drivers/input/misc/atlas_btns.c
@@ -60,11 +60,15 @@ static acpi_status acpi_atlas_button_han
static int atlas_acpi_button_probe(struct platform_device *pdev)
{
- struct acpi_device *device = ACPI_COMPANION(&pdev->dev);
+ struct acpi_device *device;
acpi_status status;
int i;
int err;
+ device = ACPI_COMPANION(&pdev->dev);
+ if (!device)
+ return -ENODEV;
+
input_dev = input_allocate_device();
if (!input_dev) {
pr_err("unable to allocate input device\n");
^ permalink raw reply
* Re: [PATCH] HID: logitech-hidpp: Add support for newer Bluetooth keyboards
From: Jiri Kosina @ 2026-05-12 16:16 UTC (permalink / raw)
To: Alain Michaud; +Cc: bentiss, lains, hadess, ogay, linux-input, linux-kernel
In-Reply-To: <20260512132244.2194556-1-alainmichaud@google.com>
On Tue, 12 May 2026, Alain Michaud wrote:
> Add product IDs (PIDs) for several newer Logitech Bluetooth keyboards
> to the hidpp_devices matching table, enabling full HID++ support for
> them.
>
> The added keyboards are:
> - Logitech Signature K650 & B2B
> - Logitech Pebble Keys 2 K380S
> - Logitech Casa Pop-Up Desk & B2B
> - Logitech Wave Keys & B2B
> - Logitech Signature Slim K950 & B2B
> - Logitech MX Keys S & B2B
> - Logitech Keys-To-Go 2
> - Logitech Pop Icon Keys
> - Logitech MX Keys Mini & B2B
> - Logitech Signature Slim Solar+ K980 B2B
> - Logitech Bluetooth Keyboard K250/K251
> - Logitech Signature Comfort K880 & B2B
>
> Signed-off-by: Alain Michaud <alainmichaud@google.com>
> Reviewed-by: Olivier Gay <ogay@logitech.com>
Applied, thanks.
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH v1 5/8] hid: Pen battery quirk for Surface Pro 12in
From: Jiri Kosina @ 2026-05-12 16:15 UTC (permalink / raw)
To: Harrison Vanderbyl
Cc: linux-arm-msm, Benjamin Tissoires, linux-input, linux-kernel
In-Reply-To: <2702fbde567457ea0835ba12cc29421590e688aa.1778498477.git.harrison.vanderbyl@gmail.com>
On Tue, 12 May 2026, Harrison Vanderbyl wrote:
> The pen setup for this device uses bluetooth for
> communicating battery levels and status instead of
> reporting it over i2c.
>
> Without this quirk, the device either reports an
> extra, broken phantom battery, or hangs.
>
> Signed-off-by: Harrison Vanderbyl <harrison.vanderbyl@gmail.com>
As this is apparently part of some bigger series, I am not sure who is
expected to merge this.
FWIW
Acked-by: Jiri Kosina <jkosina@suse.com>
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH v2] HID: pidff: Fix integer overflow in pidff_rescale
From: Jiri Kosina @ 2026-05-12 16:13 UTC (permalink / raw)
To: Tomasz Pakuła; +Cc: bentiss, oleg, linux-input, linux-kernel
In-Reply-To: <20260510122352.1161826-1-tomasz.pakula.oficjalny@gmail.com>
On Sun, 10 May 2026, Tomasz Pakuła wrote:
> Rescaling values close to the max (U16_MAX) temporarily creates values
> that exceed the s32 range. This caused value overflow in case when, for
> example, a periodic effect phase was higer than 180 degrees. In turn,
> rescale function could return values outised of the logical range of the
> HID field.
>
> Fix by using 64 bit signed integer to store the value during calculation
> but still return only 32 bit integer.
>
> Closes: https://github.com/JacKeTUs/universal-pidff/issues/116
> Fixes: 224ee88fe395 ("Input: add force feedback driver for PID devices")
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Tomasz Pakuła <tomasz.pakula.oficjalny@gmail.com>
Applied, thanks.
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH 0/4] Add MSI Claw HID Configuration Driver
From: Jiri Kosina @ 2026-05-12 16:13 UTC (permalink / raw)
To: Derek J. Clark
Cc: Benjamin Tissoires, Pierre-Loup A . Griffais, Denis Benato,
Zhouwang Huang, linux-input, linux-doc, linux-kernel
In-Reply-To: <20260510043510.442807-1-derekjohn.clark@gmail.com>
On Sun, 10 May 2026, Derek J. Clark wrote:
> This series adds and HID Configuration driver for the MSI Claw line of
> Handheld Gaming PC's. The MSI Claw HID interface provides multiple
> features, such as the ability to switch between xinput, dinput, and a
> desktop mode, RGB control, rumble intensity, and mapping of the rear "M"
> keys. There are additional gamepad modes that are not included in this
> driver as they appear to be used in assembly line testing or are
> incomplete in the firmware. During my testing I found them to be unstable.
>
> The initial version of this driver was written by Denis Benato, which
> contained the initial reverse-engineering and implementation for the
> gamepad mode switching. This work was later expanded by Zhouwang Huang
> to include more gamepad modes and additional features. Finally, I
> refactored the entire driver, fixed multiple bugs, and refined the overall
> format to conform to kernel driver best practices and style guide.
>
> Claude was used initially by Zhouwang Huang to quickly parse HID captures
> during the reverse-engineering of some of the features. Since Claude had
> already been used, as a test of its capabilities I had it implement the
> rumble intensity attribute after I had already rewritten most of the
> driver, which I then manually edited to fix some mistakes. I also used
> Claude to review the driver and these patches for any mistakes and bugs.
>
> Assisted-by: Claude:claude-sonnet-4-6
> Co-developed-by: Denis Benato <denis.benato@linux.dev>
> Signed-off-by: Denis Benato <denis.benato@linux.dev>
> Co-developed-by: Zhouwang Huang <honjow311@gmail.com>
> Signed-off-by: Zhouwang Huang <honjow311@gmail.com>
> Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
>
> Derek J. Clark (4):
> HID: hid-msi-claw: Add MSI Claw configuration driver
> HID: hid-msi-claw: Add M-key mapping attributes
> HID: hid-msi-claw: Add RGB control interface
> HID: hid-msi-claw: Add Rumble Intensity Attributes
The driver looks reasonable, I'd just like to propose that we name it just
hid-msi to follow the usual HID subsystem driver naming standards, so that
it can later be extended with supporting other MSI devices.
Thanks,
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH] HID: i2c-hid: add reset quirk for BLTP7853 touchpad
From: Jiri Kosina @ 2026-05-12 16:11 UTC (permalink / raw)
To: Xu Rao; +Cc: bentiss, linux-input, linux-kernel
In-Reply-To: <882C8FD17740299C+20260509082132.2188313-1-raoxu@uniontech.com>
On Sat, 9 May 2026, Xu Rao wrote:
> The BLTP7853 I2C HID touchpad may fail to probe after reboot or
> reprobe because reset completion is not signalled to the host. The
> driver then waits for the reset-complete interrupt until it times out
> and the device probe fails:
>
> i2c_hid i2c-BLTP7853:00: failed to reset device.
> i2c_hid i2c-BLTP7853:00: can't add hid device: -61
> i2c_hid: probe of i2c-BLTP7853:00 failed with error -61
>
> Add I2C_HID_QUIRK_NO_IRQ_AFTER_RESET for the device so i2c-hid does
> not wait for a reset interrupt that may never arrive.
>
> Signed-off-by: Xu Rao <raoxu@uniontech.com>
Applied, thank you.
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH RESEND 2] HID: Add force feedback support for Speedlink Cougar Vibration Flightstick
From: Jiri Kosina @ 2026-05-12 16:11 UTC (permalink / raw)
To: Harald Judt; +Cc: Benjamin Tissoires, linux-input
In-Reply-To: <b3bfa73b-0547-45f9-b6ae-f28815e6c632@gmx.at>
On Fri, 8 May 2026, Harald Judt wrote:
> Hi,
>
> I have implemented force feedback/rumble support for the Speedlink
> Cougar Vibration Flightstick joystick. While I am not quite sure about
> the correctness of my approach regarding the strong and weak motors, it
> seems to work as expected; I ran the fftest samples and also tested it
> successfully with SuperTuxKart.
>
> Here is the code, hopefully I have set up thunderbird mail correctly to
> not mangle the patch...
>
>
> From 48d8512fbe49ae7b940dc5869fe50aa905d3d5fb Mon Sep 17 00:00:00 2001
> From: Harald Judt <h.judt@gmx.at>
> Date: Sun, 18 Jan 2026 02:47:20 +0100
> Subject: [PATCH] HID: Add force feedback support for Gembird based joystick
>
> This commit adds force feedback support for a Gembird based joystick, namely
> the SpeedLink Cougar Vibration Flightstick (SL-6630), which sports vibration
> motors for rumble effects. Though it is not easy to determine, it seems to have
> one motor in the base and the other in the stick, both are of equal
> strength. The implementation tries to take this into account for realising weak
> and strong rumble effects and has been tested using fftest and SuperTuxKart.
>
> Signed-off-by: Harald Judt <h.judt@gmx.at>
> ---
> drivers/hid/Kconfig | 8 ++
> drivers/hid/Makefile | 1 +
> drivers/hid/hid-gembird-joy.c | 178 ++++++++++++++++++++++++++++++++++
> drivers/hid/hid-ids.h | 3 +
> drivers/hid/hid-quirks.c | 3 +
> 5 files changed, 193 insertions(+)
> create mode 100644 drivers/hid/hid-gembird-joy.c
>
> diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
> index 04420a713be0..b4e2c8f67728 100644
> --- a/drivers/hid/Kconfig
> +++ b/drivers/hid/Kconfig
> @@ -406,6 +406,14 @@ config HID_GEMBIRD
> help
> Support for Gembird JPD-DualForce 2.
>
> +config HID_GEMBIRD_JOY_FF
> + tristate "Gembird Joysticks force feedback support"
> + depends on USB_HID
> + select INPUT_FF_MEMLESS
> + help
> + Force feedback support for Gembird (Vendor ID 0x12bd) based devices:
> + - Speed Link Cougar Vibration Flightstick (SL-6630)
> +
> config HID_GFRM
> tristate "Google Fiber TV Box remote control support"
> help
> diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
> index 361a7daedeb8..593a429661ed 100644
> --- a/drivers/hid/Makefile
> +++ b/drivers/hid/Makefile
> @@ -54,6 +54,7 @@ obj-$(CONFIG_HID_EVISION) += hid-evision.o
> obj-$(CONFIG_HID_EZKEY) += hid-ezkey.o
> obj-$(CONFIG_HID_FT260) += hid-ft260.o
> obj-$(CONFIG_HID_GEMBIRD) += hid-gembird.o
> +obj-$(CONFIG_HID_GEMBIRD_JOY_FF) += hid-gembird-joy.o
Would it be possible to link this support to hid-gembird if enabled?
Thanks,
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH] HID: pxrc: fix slab-out-of-bounds read/write in pxrc_raw_event()
From: Jiri Kosina @ 2026-05-12 16:10 UTC (permalink / raw)
To: Jinmo Yang
Cc: marcus.folkesson, benjamin.tissoires, linux-input, linux-kernel,
stable
In-Reply-To: <20260508133311.3995013-1-jinmo44.yang@gmail.com>
On Fri, 8 May 2026, Jinmo Yang wrote:
> pxrc_raw_event() accesses data[7] without verifying that the buffer is
> large enough. A device that sends a report shorter than 8 bytes causes
> an out-of-bounds read (priv->dial = data[7]) and an out-of-bounds write
> (data[7] = priv->dial) on the report buffer, corrupting adjacent slab
> memory.
>
> This can be triggered from userspace via /dev/uhid by creating a virtual
> device with VID 0x1781 / PID 0x0898 and sending a short UHID_INPUT2
> report.
>
> Add a size check at the top of pxrc_raw_event() to bail out when the
> report buffer is shorter than 8 bytes.
>
> Fixes: a2dccedac664 ("HID: pxrc: new driver for PhoenixRC Flight Controller Adapter")
Where is this tag coming from?
No such hash exists in Linus' tree, and the commit that actually added the
driver has a different shortlog.
Is this some LLM halucination?
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH] amd-sfh-hid: tablet mode switch and asus quirk
From: Jiri Kosina @ 2026-05-12 16:06 UTC (permalink / raw)
To: Helge Bahmann
Cc: Nehal Bakulchandra Shah, Sandeep Singh, Basavaraj Natikar,
bentiss, linux-hid, linux-input
In-Reply-To: <6879487.lOV4Wx5bFT@lothlorien>
On Mon, 27 Apr 2026, Helge Bahmann wrote:
> Add an input driver that interprets the "operation mode" sensor offered
> by the amd sfh on some laptop models.
>
> Add a quirk to make the driver work again with the Asus VivoBook
> VivoBook (turn off the "disable interrupts" flag).
>
> Expose the intr_disable flag as a module parameter in case it turns out
> to be needed on further laptop models.
>
> Signed-off-by: Helge Bahmann <hcb@chaoticmind.net>
Basavaraj, can you please review this one?
Thanks,
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH v3 0/4] HID: Proper fix for OOM in hid-core
From: Jiri Kosina @ 2026-05-12 16:04 UTC (permalink / raw)
To: Benjamin Tissoires
Cc: Filipe Laíns, Bastien Nocera, Ping Cheng, Jason Gerecke,
Viresh Kumar, Johan Hovold, Alex Elder, Greg Kroah-Hartman,
Lee Jones, Icenowy Zheng, linux-input, linux-kernel, greybus-dev,
linux-staging, linux-usb, stable
In-Reply-To: <20260504-wip-fix-core-v3-0-ce1f11f4968f@kernel.org>
On Mon, 4 May 2026, Benjamin Tissoires wrote:
> Commit 0a3fe972a7cb ("HID: core: Mitigate potential OOB by removing
> bogus memset()") enforced the provided data to be at least the size of
> the declared buffer in the report descriptor to prevent a buffer
> overflow.
>
> We only had corner cases of malicious devices exposing the OOM because
> in most cases, the buffer provided by the transport layer needs to be
> allocated at probe time and is large enough to handle all the possible
> reports.
>
> However, the patch from above, which enforces the spec a little bit more
> introduced both regressions for devices not following the spec (not
> necesserally malicious), but also a stream of errors for those devices.
>
> Let's revert to the old behavior by giving more information to HID core
> to be able to decide whether it can or not memset the rest of the buffer
> to 0 and continue the processing.
>
> Note that the first commit makes an API change, but the callers are
> relatively limited, so it should be fine on its own. The second patch
> can't really make the same kind of API change because we have too many
> callers in various subsystems. We can switch them one by one to the safe
> approach when needed.
>
> The last 2 patches are small cleanups I initially put together with the
> 2 first patches, but they can be applied on their own and don't need to
> be pulled in stable like the first 2.
>
> Cheers,
> Benjamin
>
> Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
I have now queued the first two in hid.git#for-7.1/upstream-fixes.
I expect the remaining two will be applied once respun with Dmitry's
suggestion on proper guarding.
Thanks,
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH] HID: google: hammer: stop hardware on devres action failure
From: Jiri Kosina @ 2026-05-12 16:01 UTC (permalink / raw)
To: 박명훈; +Cc: Benjamin Tissoires, linux-input, linux-kernel
In-Reply-To: <20260424125043.52639-1-pakmyeonghun@bagmyeonghun-ui-MacBookPro.local>
On Fri, 24 Apr 2026, 박명훈 wrote:
> From: Myeonghun Pak <mhun512@gmail.com>
>
> hammer_probe() starts the HID hardware before registering the devres
> action that stops it. If devm_add_action() fails, probe returns an
> error with the hardware still started because the cleanup action was
> never registered and the driver's remove callback is not called after a
> failed probe.
>
> Use devm_add_action_or_reset() so the stop action runs immediately on
> registration failure while preserving the existing devres-managed cleanup
> path for later probe failures and remove.
>
> Signed-off-by: Myeonghun Pak <mhun512@gmail.com>
> ---
> drivers/hid/hid-google-hammer.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/hid/hid-google-hammer.c b/drivers/hid/hid-google-hammer.c
> index 1af477e584..c99c3c0d44 100644
> --- a/drivers/hid/hid-google-hammer.c
> +++ b/drivers/hid/hid-google-hammer.c
> @@ -496,7 +496,7 @@ static int hammer_probe(struct hid_device *hdev,
> if (error)
> return error;
>
> - error = devm_add_action(&hdev->dev, hammer_stop, hdev);
> + error = devm_add_action_or_reset(&hdev->dev, hammer_stop, hdev);
Makes sense, thanks for catching it. Applied.
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH 0/2] HID: appletb-kbd: fix UAF and mutex-in-atomic in inactivity timer
From: Jiri Kosina @ 2026-05-12 15:57 UTC (permalink / raw)
To: Sangyun Kim; +Cc: bentiss, qasdev00, gargaditya08, linux-input, linux-kernel
In-Reply-To: <20260420051318.1411671-1-sangyun.kim@snu.ac.kr>
On Mon, 20 Apr 2026, Sangyun Kim wrote:
> This series addresses two defects in hid-appletb-kbd's inactivity
> timer subsystem. The two patches target different bugs and are
> logically independent; they are sent together because they touch the
> same tear-down code and because the same maintainer will review both.
>
> Patch 1 fixes a slab use-after-free with two related tear-down windows
> introduced by commit 38224c472a03 ("HID: appletb-kbd: fix slab
> use-after-free bug in appletb_kbd_probe"):
>
> A) Within "if (kbd->backlight_dev)" the order was
> put_device() then timer_delete_sync(). A concurrent
> hid_appletb_bl unbind between those two calls can drop the last
> devm reference and free the backlight_device; the still-armed
> inactivity timer softirq then dereferences the freed object
> through backlight_device_set_brightness() -> mutex_lock(&ops_lock).
>
> B) The "if (kbd->backlight_dev)" block ran before
> hid_hw_close()/hid_hw_stop(), so even after window A is closed a
> late ".event" callback from the HID core (USB URB completion on
> real hardware) can arrive between timer_delete_sync() and
> put_device(), reach reset_inactivity_timer(), re-arm the timer
> via mod_timer(), and reopen the same UAF.
>
> Both windows produce the same KASAN slab-use-after-free on the object
> allocated by devm_backlight_device_register(). Patch 1 closes them
> together by moving hid_hw_close()/hid_hw_stop() before the backlight
> cleanup and, inside that cleanup block, calling timer_delete_sync()
> before put_device(). Shipping both as one commit avoids leaving
> stable kernels in a half-fixed state where only window A is closed.
>
> Patch 2 fixes a separate "sleeping function called from invalid
> context" bug in the same subsystem. The inactivity timer is a
> struct timer_list, so the callback runs in softirq context and calls
> backlight_device_set_brightness() -> mutex_lock() from atomic
> context; reset_inactivity_timer() has the same issue on the
> brightness-restore path (it is called from appletb_kbd_hid_event()
> and appletb_kbd_inp_event(), which run in softirq/IRQ context on
> real USB hardware). Convert the inactivity timer to a delayed_work
> and defer the brightness-restore call to a dedicated work_struct so
> both sleeping calls run in process context.
>
> Sangyun Kim (2):
> HID: appletb-kbd: fix UAF in inactivity-timer cleanup path
> HID: appletb-kbd: run inactivity autodim from workqueues
Both applied to hid.git#for-7.1/upstream-fixes, thanks.
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH v4 0/5] Add OneXPlayer Configuration HID Driver
From: Jiri Kosina @ 2026-05-12 15:56 UTC (permalink / raw)
To: Derek J. Clark
Cc: Benjamin Tissoires, Pierre-Loup A . Griffais, Lambert Fan,
Zhouwang Huang, linux-input, linux-doc, linux-kernel
In-Reply-To: <20260419042624.625746-1-derekjohn.clark@gmail.com>
On Sat, 18 Apr 2026, Derek J. Clark wrote:
> Adds an HID driver for OneXPlayer HID configuration devices. There are
> currently 2 generations of OneXPlayer HID protocol. The first (OneXPlayer
> F1 series) only provides an RGB control interface over HID. The Second
> (X1 mini series, G1 series, AOKZOE A1X) also includes a hardware level
> button mapping interface, vibration intensity settings, and the ability
> to switch output between xinput and a debug mode that can be used to debug
> the button mapping. Some devices (G1 Series, APEX) use a hybrid of Gen1
> RGB control and Gen 2 controller settings. To ensure there is no conflicts
> when the driver is loaded, we skip creating the RGB interface for Gen 2
> devices if there is a DMI match.
>
> I'll also add a note that Gen 1 devices also have an interface for
> setting the key map and debug mode, but that is done entirely over a
> serial TTY device so it is not able to be added to this driver. There
> are also some "Gen 0" devices (OneXPlayer 2 Series) also use it, but
> the TTY interface also handles the RGB control so no support is
> provided by this driver for those interfaces.
>
> Signed-off-by: Derel J. Clark <derekjohn.clark@gmail.com>
> ---
> v4:
> - Make all delayed work part of drvdata & ensure they are canceled
> during remove.
>
> v3: https://lore.kernel.org/linux-input/20260412213444.2231505-1-derekjohn.clark@gmail.com/
> - Ensure default button map is properly init during probe.
>
> v2: https://lore.kernel.org/linux-input/20260407041354.2283201-1-derekjohn.clark@gmail.com/
> - Add DMI quirks for certain devices that ship with both GEN1 and GEN2
> MCU to avoid clashing when initializing the RGB interface.
> - Add left & right vibration intensity attributes.
> - Add additional mappings for keyboard inputs.
> - Add a delayed work trigger to re-apply settings after the MCU
> completes initializing after a suspend/resume cycle.
>
> v1: https://lore.kernel.org/linux-input/20260322031615.1524307-1-derekjohn.clark@gmail.com/
Now in hid.git#for-7.2/oxp, thanks.
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
* Re: [PATCH] HID: playstation: Clamp num_touch_reports
From: Jiri Kosina @ 2026-05-12 15:55 UTC (permalink / raw)
To: T.J. Mercier
Cc: roderick.colenbrander, linux-input, Benjamin Tissoires, stable,
Xingyu Jin, Roderick Colenbrander, linux-kernel
In-Reply-To: <20260417154704.1186803-1-tjmercier@google.com>
On Fri, 17 Apr 2026, T.J. Mercier wrote:
> A device would never lie about the number of touch reports would it?
>
> If it does the loop in dualshock4_parse_report will read off the end of
> the touch_reports array, up to about 2 KiB for the maximum number of 256
> loop iteraions. The data that is read is emitted via evdev if the
> DS4_TOUCH_POINT_INACTIVE bit happens to be set. Protect against this by
> clamping the num_touch_reports value provided by the device to the
> maximum size of the touch_reports array.
>
> Fixes: 752038248808 ("HID: playstation: add DualShock4 touchpad support.")
> Cc: stable@vger.kernel.org
> Reported-by: Xingyu Jin <xingyuj@google.com>
> Signed-off-by: T.J. Mercier <tjmercier@google.com>
Applied, thanks.
--
Jiri Kosina
SUSE Labs
^ permalink raw reply
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