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HID: logitech: Enable high-resolution scrolling on Logitech mice

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There are three features used by various Logitech mice for
high-resolution scrolling: the scrolling acceleration bit in HID++ 1.0,
and the x2120 and x2121 features in HID++ 2.0 and above. This patch
supports all three, and uses the multiplier reported by the mouse for
the HID++ 2.0+ features.

The full list of product IDs of mice which support high-resolution
scrolling was provided by Logitech, but the patch was tested using the
following mice (using the Unifying receiver):

* HID++ 1.0: Anywhere MX, Performance MX
* x2120: M560
* x2121: MX Anywhere 2, MX Master 2S

This patch is a combinations of the now-reverted commits 1ff2e1a44e,
d56ca9855b, 5fe2ccbef9, 044ee89028 together with some extra bits for the
directional and timeout-based reset.
The previous patch series was in hid-input, it appears this remainder
handling is logitech-specific and was moved to hid-logitech-hidpp.c and
renamed accordingly.

Signed-off-by: Harry Cutts <hcutts@chromium.org>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Verified-by: Harry Cutts <hcutts@chromium.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
This commit is contained in:
Harry Cutts 2018-12-05 10:42:27 +10:00 committed by Benjamin Tissoires
parent 95c3d00282
commit 4435ff2f09
1 changed files with 295 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

301
drivers/hid/hid-logitech-hidpp.c
View File

@ -21,6 +21,7 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/sched/clock.h>
#include <linux/kfifo.h>
#include <linux/input/mt.h>
#include <linux/workqueue.h>
@ -64,6 +65,14 @@ MODULE_PARM_DESC(disable_tap_to_click,
#define HIDPP_QUIRK_NO_HIDINPUT BIT(23)
#define HIDPP_QUIRK_FORCE_OUTPUT_REPORTS BIT(24)
#define HIDPP_QUIRK_UNIFYING BIT(25)
#define HIDPP_QUIRK_HI_RES_SCROLL_1P0 BIT(26)
#define HIDPP_QUIRK_HI_RES_SCROLL_X2120 BIT(27)
#define HIDPP_QUIRK_HI_RES_SCROLL_X2121 BIT(28)
/* Convenience constant to check for any high-res support. */
#define HIDPP_QUIRK_HI_RES_SCROLL (HIDPP_QUIRK_HI_RES_SCROLL_1P0 | \
HIDPP_QUIRK_HI_RES_SCROLL_X2120 | \
HIDPP_QUIRK_HI_RES_SCROLL_X2121)
#define HIDPP_QUIRK_DELAYED_INIT HIDPP_QUIRK_NO_HIDINPUT
@ -128,6 +137,25 @@ struct hidpp_battery {
bool online;
};
/**
* struct hidpp_scroll_counter - Utility class for processing high-resolution
* scroll events.
* @dev: the input device for which events should be reported.
* @wheel_multiplier: the scalar multiplier to be applied to each wheel event
* @remainder: counts the number of high-resolution units moved since the last
* low-resolution event (REL_WHEEL or REL_HWHEEL) was sent. Should
* only be used by class methods.
* @direction: direction of last movement (1 or -1)
* @last_time: last event time, used to reset remainder after inactivity
*/
struct hidpp_scroll_counter {
struct input_dev *dev;
int wheel_multiplier;
int remainder;
int direction;
unsigned long long last_time;
};
struct hidpp_device {
struct hid_device *hid_dev;
struct mutex send_mutex;
@ -149,6 +177,7 @@ struct hidpp_device {
unsigned long capabilities;
struct hidpp_battery battery;
struct hidpp_scroll_counter vertical_wheel_counter;
};
/* HID++ 1.0 error codes */
@ -391,6 +420,67 @@ static void hidpp_prefix_name(char **name, int name_length)
*name = new_name;
}
/**
* hidpp_scroll_counter_handle_scroll() - Send high- and low-resolution scroll
* events given a high-resolution wheel
* movement.
* @counter: a hid_scroll_counter struct describing the wheel.
* @hi_res_value: the movement of the wheel, in the mouse's high-resolution
* units.
*
* Given a high-resolution movement, this function converts the movement into
* fractions of 120 and emits high-resolution scroll events for the input
* device. It also uses the multiplier from &struct hid_scroll_counter to
* emit low-resolution scroll events when appropriate for
* backwards-compatibility with userspace input libraries.
*/
static void hidpp_scroll_counter_handle_scroll(struct hidpp_scroll_counter *counter,
int hi_res_value)
{
int low_res_value, remainder, direction;
unsigned long long now, previous;
hi_res_value = hi_res_value * 120/counter->wheel_multiplier;
input_report_rel(counter->dev, REL_WHEEL_HI_RES, hi_res_value);
remainder = counter->remainder;
direction = hi_res_value > 0 ? 1 : -1;
now = sched_clock();
previous = counter->last_time;
counter->last_time = now;
/*
* Reset the remainder after a period of inactivity or when the
* direction changes. This prevents the REL_WHEEL emulation point
* from sliding for devices that don't always provide the same
* number of movements per detent.
*/
if (now - previous > 1000000000 || direction != counter->direction)
remainder = 0;
counter->direction = direction;
remainder += hi_res_value;
/* Some wheels will rest 7/8ths of a detent from the previous detent
* after slow movement, so we want the threshold for low-res events to
* be in the middle between two detents (e.g. after 4/8ths) as
* opposed to on the detents themselves (8/8ths).
*/
if (abs(remainder) >= 60) {
/* Add (or subtract) 1 because we want to trigger when the wheel
* is half-way to the next detent (i.e. scroll 1 detent after a
* 1/2 detent movement, 2 detents after a 1 1/2 detent movement,
* etc.).
*/
low_res_value = remainder / 120;
if (low_res_value == 0)
low_res_value = (hi_res_value > 0 ? 1 : -1);
input_report_rel(counter->dev, REL_WHEEL, low_res_value);
remainder -= low_res_value * 120;
}
counter->remainder = remainder;
}
/* -------------------------------------------------------------------------- */
/* HIDP++ 1.0 commands */
/* -------------------------------------------------------------------------- */
@ -1157,6 +1247,99 @@ static int hidpp_battery_get_property(struct power_supply *psy,
return ret;
}
/* -------------------------------------------------------------------------- */
/* 0x2120: Hi-resolution scrolling */
/* -------------------------------------------------------------------------- */
#define HIDPP_PAGE_HI_RESOLUTION_SCROLLING 0x2120
#define CMD_HI_RESOLUTION_SCROLLING_SET_HIGHRES_SCROLLING_MODE 0x10
static int hidpp_hrs_set_highres_scrolling_mode(struct hidpp_device *hidpp,
bool enabled, u8 *multiplier)
{
u8 feature_index;
u8 feature_type;
int ret;
u8 params[1];
struct hidpp_report response;
ret = hidpp_root_get_feature(hidpp,
HIDPP_PAGE_HI_RESOLUTION_SCROLLING,
&feature_index,
&feature_type);
if (ret)
return ret;
params[0] = enabled ? BIT(0) : 0;
ret = hidpp_send_fap_command_sync(hidpp, feature_index,
CMD_HI_RESOLUTION_SCROLLING_SET_HIGHRES_SCROLLING_MODE,
params, sizeof(params), &response);
if (ret)
return ret;
*multiplier = response.fap.params[1];
return 0;
}
/* -------------------------------------------------------------------------- */
/* 0x2121: HiRes Wheel */
/* -------------------------------------------------------------------------- */
#define HIDPP_PAGE_HIRES_WHEEL 0x2121
#define CMD_HIRES_WHEEL_GET_WHEEL_CAPABILITY 0x00
#define CMD_HIRES_WHEEL_SET_WHEEL_MODE 0x20
static int hidpp_hrw_get_wheel_capability(struct hidpp_device *hidpp,
u8 *multiplier)
{
u8 feature_index;
u8 feature_type;
int ret;
struct hidpp_report response;
ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_HIRES_WHEEL,
&feature_index, &feature_type);
if (ret)
goto return_default;
ret = hidpp_send_fap_command_sync(hidpp, feature_index,
CMD_HIRES_WHEEL_GET_WHEEL_CAPABILITY,
NULL, 0, &response);
if (ret)
goto return_default;
*multiplier = response.fap.params[0];
return 0;
return_default:
hid_warn(hidpp->hid_dev,
"Couldn't get wheel multiplier (error %d)\n", ret);
return ret;
}
static int hidpp_hrw_set_wheel_mode(struct hidpp_device *hidpp, bool invert,
bool high_resolution, bool use_hidpp)
{
u8 feature_index;
u8 feature_type;
int ret;
u8 params[1];
struct hidpp_report response;
ret = hidpp_root_get_feature(hidpp, HIDPP_PAGE_HIRES_WHEEL,
&feature_index, &feature_type);
if (ret)
return ret;
params[0] = (invert ? BIT(2) : 0) |
(high_resolution ? BIT(1) : 0) |
(use_hidpp ? BIT(0) : 0);
return hidpp_send_fap_command_sync(hidpp, feature_index,
CMD_HIRES_WHEEL_SET_WHEEL_MODE,
params, sizeof(params), &response);
}
/* -------------------------------------------------------------------------- */
/* 0x4301: Solar Keyboard */
/* -------------------------------------------------------------------------- */
@ -2408,10 +2591,15 @@ static int m560_raw_event(struct hid_device *hdev, u8 *data, int size)
input_report_key(mydata->input, BTN_RIGHT,
!!(data[1] & M560_MOUSE_BTN_RIGHT));
if (data[1] & M560_MOUSE_BTN_WHEEL_LEFT)
if (data[1] & M560_MOUSE_BTN_WHEEL_LEFT) {
input_report_rel(mydata->input, REL_HWHEEL, -1);
else if (data[1] & M560_MOUSE_BTN_WHEEL_RIGHT)
input_report_rel(mydata->input, REL_HWHEEL_HI_RES,
-120);
} else if (data[1] & M560_MOUSE_BTN_WHEEL_RIGHT) {
input_report_rel(mydata->input, REL_HWHEEL, 1);
input_report_rel(mydata->input, REL_HWHEEL_HI_RES,
120);
}
v = hid_snto32(hid_field_extract(hdev, data+3, 0, 12), 12);
input_report_rel(mydata->input, REL_X, v);
@ -2420,7 +2608,8 @@ static int m560_raw_event(struct hid_device *hdev, u8 *data, int size)
input_report_rel(mydata->input, REL_Y, v);
v = hid_snto32(data[6], 8);
input_report_rel(mydata->input, REL_WHEEL, v);
hidpp_scroll_counter_handle_scroll(
&hidpp->vertical_wheel_counter, v);
input_sync(mydata->input);
}
@ -2447,6 +2636,8 @@ static void m560_populate_input(struct hidpp_device *hidpp,
__set_bit(REL_Y, mydata->input->relbit);
__set_bit(REL_WHEEL, mydata->input->relbit);
__set_bit(REL_HWHEEL, mydata->input->relbit);
__set_bit(REL_WHEEL_HI_RES, mydata->input->relbit);
__set_bit(REL_HWHEEL_HI_RES, mydata->input->relbit);
}
static int m560_input_mapping(struct hid_device *hdev, struct hid_input *hi,
@ -2548,6 +2739,37 @@ static int g920_get_config(struct hidpp_device *hidpp)
return 0;
}
/* -------------------------------------------------------------------------- */
/* High-resolution scroll wheels */
/* -------------------------------------------------------------------------- */
static int hi_res_scroll_enable(struct hidpp_device *hidpp)
{
int ret;
u8 multiplier = 1;
if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL_X2121) {
ret = hidpp_hrw_set_wheel_mode(hidpp, false, true, false);
if (ret == 0)
ret = hidpp_hrw_get_wheel_capability(hidpp, &multiplier);
} else if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL_X2120) {
ret = hidpp_hrs_set_highres_scrolling_mode(hidpp, true,
&multiplier);
} else /* if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL_1P0) */ {
ret = hidpp10_enable_scrolling_acceleration(hidpp);
multiplier = 8;
}
if (ret)
return ret;
if (multiplier == 0)
multiplier = 1;
hidpp->vertical_wheel_counter.wheel_multiplier = multiplier;
hid_info(hidpp->hid_dev, "multiplier = %d\n", multiplier);
return 0;
}
/* -------------------------------------------------------------------------- */
/* Generic HID++ devices */
/* -------------------------------------------------------------------------- */
@ -2593,6 +2815,9 @@ static void hidpp_populate_input(struct hidpp_device *hidpp,
wtp_populate_input(hidpp, input, origin_is_hid_core);
else if (hidpp->quirks & HIDPP_QUIRK_CLASS_M560)
m560_populate_input(hidpp, input, origin_is_hid_core);
if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL)
hidpp->vertical_wheel_counter.dev = input;
}
static int hidpp_input_configured(struct hid_device *hdev,
@ -2711,6 +2936,27 @@ static int hidpp_raw_event(struct hid_device *hdev, struct hid_report *report,
return 0;
}
static int hidpp_event(struct hid_device *hdev, struct hid_field *field,
struct hid_usage *usage, __s32 value)
{
/* This function will only be called for scroll events, due to the
* restriction imposed in hidpp_usages.
*/
struct hidpp_device *hidpp = hid_get_drvdata(hdev);
struct hidpp_scroll_counter *counter = &hidpp->vertical_wheel_counter;
/* A scroll event may occur before the multiplier has been retrieved or
* the input device set, or high-res scroll enabling may fail. In such
* cases we must return early (falling back to default behaviour) to
* avoid a crash in hidpp_scroll_counter_handle_scroll.
*/
if (!(hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL) || value == 0
|| counter->dev == NULL || counter->wheel_multiplier == 0)
return 0;
hidpp_scroll_counter_handle_scroll(counter, value);
return 1;
}
static int hidpp_initialize_battery(struct hidpp_device *hidpp)
{
static atomic_t battery_no = ATOMIC_INIT(0);
@ -2922,6 +3168,9 @@ static void hidpp_connect_event(struct hidpp_device *hidpp)
if (hidpp->battery.ps)
power_supply_changed(hidpp->battery.ps);
if (hidpp->quirks & HIDPP_QUIRK_HI_RES_SCROLL)
hi_res_scroll_enable(hidpp);
if (!(hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT) || hidpp->delayed_input)
/* if the input nodes are already created, we can stop now */
return;
@ -3107,6 +3356,10 @@ static void hidpp_remove(struct hid_device *hdev)
mutex_destroy(&hidpp->send_mutex);
}
#define LDJ_DEVICE(product) \
HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE, \
USB_VENDOR_ID_LOGITECH, (product))
static const struct hid_device_id hidpp_devices[] = {
{ /* wireless touchpad */
HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
@ -3121,10 +3374,39 @@ static const struct hid_device_id hidpp_devices[] = {
HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
USB_DEVICE_ID_LOGITECH_T651),
.driver_data = HIDPP_QUIRK_CLASS_WTP },
{ /* Mouse Logitech Anywhere MX */
LDJ_DEVICE(0x1017), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_1P0 },
{ /* Mouse Logitech Cube */
LDJ_DEVICE(0x4010), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2120 },
{ /* Mouse Logitech M335 */
LDJ_DEVICE(0x4050), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ /* Mouse Logitech M515 */
LDJ_DEVICE(0x4007), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2120 },
{ /* Mouse logitech M560 */
HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
USB_VENDOR_ID_LOGITECH, 0x402d),
.driver_data = HIDPP_QUIRK_DELAYED_INIT | HIDPP_QUIRK_CLASS_M560 },
LDJ_DEVICE(0x402d),
.driver_data = HIDPP_QUIRK_DELAYED_INIT | HIDPP_QUIRK_CLASS_M560
| HIDPP_QUIRK_HI_RES_SCROLL_X2120 },
{ /* Mouse Logitech M705 (firmware RQM17) */
LDJ_DEVICE(0x101b), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_1P0 },
{ /* Mouse Logitech M705 (firmware RQM67) */
LDJ_DEVICE(0x406d), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ /* Mouse Logitech M720 */
LDJ_DEVICE(0x405e), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ /* Mouse Logitech MX Anywhere 2 */
LDJ_DEVICE(0x404a), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ LDJ_DEVICE(0xb013), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ LDJ_DEVICE(0xb018), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ LDJ_DEVICE(0xb01f), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ /* Mouse Logitech MX Anywhere 2S */
LDJ_DEVICE(0x406a), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ /* Mouse Logitech MX Master */
LDJ_DEVICE(0x4041), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ LDJ_DEVICE(0x4060), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ LDJ_DEVICE(0x4071), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ /* Mouse Logitech MX Master 2S */
LDJ_DEVICE(0x4069), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_X2121 },
{ /* Mouse Logitech Performance MX */
LDJ_DEVICE(0x101a), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_1P0 },
{ /* Keyboard logitech K400 */
HID_DEVICE(BUS_USB, HID_GROUP_LOGITECH_DJ_DEVICE,
USB_VENDOR_ID_LOGITECH, 0x4024),
@ -3144,12 +3426,19 @@ static const struct hid_device_id hidpp_devices[] = {
MODULE_DEVICE_TABLE(hid, hidpp_devices);
static const struct hid_usage_id hidpp_usages[] = {
{ HID_GD_WHEEL, EV_REL, REL_WHEEL_HI_RES },
{ HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
};
static struct hid_driver hidpp_driver = {
.name = "logitech-hidpp-device",
.id_table = hidpp_devices,
.probe = hidpp_probe,
.remove = hidpp_remove,
.raw_event = hidpp_raw_event,
.usage_table = hidpp_usages,
.event = hidpp_event,
.input_configured = hidpp_input_configured,
.input_mapping = hidpp_input_mapping,
.input_mapped = hidpp_input_mapped,