diff options
author | Nikolai Kondrashov <spbnick@gmail.com> | 2022-02-10 20:04:34 +0100 |
---|---|---|
committer | Jiri Kosina <jkosina@suse.cz> | 2022-02-16 16:41:54 +0100 |
commit | 7e418667f2ed035445f8631b451e41d4ec13533c (patch) | |
tree | f660e5487986570bb3e87108102d3e31505cce5b /drivers/hid/hid-uclogic-core.c | |
parent | HID: uclogic: Support Huion 13th frame button (diff) | |
download | linux-7e418667f2ed035445f8631b451e41d4ec13533c.tar.xz linux-7e418667f2ed035445f8631b451e41d4ec13533c.zip |
HID: uclogic: Split pen and frame raw event handling
In order to avoid ending up with a big uclogic_raw_event function,
split it in two smaller functions: uclogic_raw_event_pen for the pen
events and uclogic_raw_event_frame for the pad events.
Signed-off-by: Nikolai Kondrashov <spbnick@gmail.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-uclogic-core.c')
-rw-r--r-- | drivers/hid/hid-uclogic-core.c | 195 |
1 files changed, 120 insertions, 75 deletions
diff --git a/drivers/hid/hid-uclogic-core.c b/drivers/hid/hid-uclogic-core.c index 850c660ec2ab..9187fd835a46 100644 --- a/drivers/hid/hid-uclogic-core.c +++ b/drivers/hid/hid-uclogic-core.c @@ -246,6 +246,123 @@ static int uclogic_resume(struct hid_device *hdev) } #endif +/** + * uclogic_raw_event_pen - handle raw pen events (pen HID reports). + * + * @drvdata: Driver data. + * @data: Report data buffer, can be modified. + * @size: Report data size, bytes. + * + * Returns: + * Negative value on error (stops event delivery), zero for success. + */ +static int uclogic_raw_event_pen(struct uclogic_drvdata *drvdata, + u8 *data, int size) +{ + struct uclogic_params *params = &drvdata->params; + + WARN_ON(drvdata == NULL); + WARN_ON(data == NULL && size != 0); + + /* If in-range reports are inverted */ + if (params->pen.inrange == + UCLOGIC_PARAMS_PEN_INRANGE_INVERTED) { + /* Invert the in-range bit */ + data[1] ^= 0x40; + } + /* + * If report contains fragmented high-resolution pen + * coordinates + */ + if (size >= 10 && params->pen.fragmented_hires) { + u8 pressure_low_byte; + u8 pressure_high_byte; + + /* Lift pressure bytes */ + pressure_low_byte = data[6]; + pressure_high_byte = data[7]; + /* + * Move Y coord to make space for high-order X + * coord byte + */ + data[6] = data[5]; + data[5] = data[4]; + /* Move high-order X coord byte */ + data[4] = data[8]; + /* Move high-order Y coord byte */ + data[7] = data[9]; + /* Place pressure bytes */ + data[8] = pressure_low_byte; + data[9] = pressure_high_byte; + } + /* If we need to emulate in-range detection */ + if (params->pen.inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) { + /* Set in-range bit */ + data[1] |= 0x40; + /* (Re-)start in-range timeout */ + mod_timer(&drvdata->inrange_timer, + jiffies + msecs_to_jiffies(100)); + } + /* If we report tilt and Y direction is flipped */ + if (size >= 12 && params->pen.tilt_y_flipped) + data[11] = -data[11]; + + return 0; +} + +/** + * uclogic_raw_event_frame - handle raw frame events (frame HID reports). + * + * @drvdata: Driver data. + * @data: Report data buffer, can be modified. + * @size: Report data size, bytes. + * + * Returns: + * Negative value on error (stops event delivery), zero for success. + */ +static int uclogic_raw_event_frame(struct uclogic_drvdata *drvdata, + u8 *data, int size) +{ + struct uclogic_params *params = &drvdata->params; + + WARN_ON(drvdata == NULL); + WARN_ON(data == NULL && size != 0); + + /* If need to, and can, set pad device ID for Wacom drivers */ + if (params->frame.dev_id_byte > 0 && + params->frame.dev_id_byte < size) { + data[params->frame.dev_id_byte] = 0xf; + } + /* If need to, and can, read rotary encoder state change */ + if (params->frame.re_lsb > 0 && + params->frame.re_lsb / 8 < size) { + unsigned int byte = params->frame.re_lsb / 8; + unsigned int bit = params->frame.re_lsb % 8; + + u8 change; + u8 prev_state = drvdata->re_state; + /* Read Gray-coded state */ + u8 state = (data[byte] >> bit) & 0x3; + /* Encode state change into 2-bit signed integer */ + if ((prev_state == 1 && state == 0) || + (prev_state == 2 && state == 3)) { + change = 1; + } else if ((prev_state == 2 && state == 0) || + (prev_state == 1 && state == 3)) { + change = 3; + } else { + change = 0; + } + /* Write change */ + data[byte] = (data[byte] & ~((u8)3 << bit)) | + (change << bit); + /* Remember state */ + drvdata->re_state = state; + } + + return 0; +} + static int uclogic_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size) @@ -265,85 +382,13 @@ static int uclogic_raw_event(struct hid_device *hdev, data[0] = params->frame.id; return 0; } - /* If in-range reports are inverted */ - if (params->pen.inrange == - UCLOGIC_PARAMS_PEN_INRANGE_INVERTED) { - /* Invert the in-range bit */ - data[1] ^= 0x40; - } - /* - * If report contains fragmented high-resolution pen - * coordinates - */ - if (size >= 10 && params->pen.fragmented_hires) { - u8 pressure_low_byte; - u8 pressure_high_byte; - - /* Lift pressure bytes */ - pressure_low_byte = data[6]; - pressure_high_byte = data[7]; - /* - * Move Y coord to make space for high-order X - * coord byte - */ - data[6] = data[5]; - data[5] = data[4]; - /* Move high-order X coord byte */ - data[4] = data[8]; - /* Move high-order Y coord byte */ - data[7] = data[9]; - /* Place pressure bytes */ - data[8] = pressure_low_byte; - data[9] = pressure_high_byte; - } - /* If we need to emulate in-range detection */ - if (params->pen.inrange == UCLOGIC_PARAMS_PEN_INRANGE_NONE) { - /* Set in-range bit */ - data[1] |= 0x40; - /* (Re-)start in-range timeout */ - mod_timer(&drvdata->inrange_timer, - jiffies + msecs_to_jiffies(100)); - } - /* If we report tilt and Y direction is flipped */ - if (size >= 12 && params->pen.tilt_y_flipped) - data[11] = -data[11]; + return uclogic_raw_event_pen(drvdata, data, size); } /* Tweak frame control reports, if necessary */ if ((report->type == HID_INPUT_REPORT) && - (report->id == params->frame.id)) { - /* If need to, and can, set pad device ID for Wacom drivers */ - if (params->frame.dev_id_byte > 0 && - params->frame.dev_id_byte < size) { - data[params->frame.dev_id_byte] = 0xf; - } - /* If need to, and can, read rotary encoder state change */ - if (params->frame.re_lsb > 0 && - params->frame.re_lsb / 8 < size) { - unsigned int byte = params->frame.re_lsb / 8; - unsigned int bit = params->frame.re_lsb % 8; - - u8 change; - u8 prev_state = drvdata->re_state; - /* Read Gray-coded state */ - u8 state = (data[byte] >> bit) & 0x3; - /* Encode state change into 2-bit signed integer */ - if ((prev_state == 1 && state == 0) || - (prev_state == 2 && state == 3)) { - change = 1; - } else if ((prev_state == 2 && state == 0) || - (prev_state == 1 && state == 3)) { - change = 3; - } else { - change = 0; - } - /* Write change */ - data[byte] = (data[byte] & ~((u8)3 << bit)) | - (change << bit); - /* Remember state */ - drvdata->re_state = state; - } - } + (report->id == params->frame.id)) + return uclogic_raw_event_frame(drvdata, data, size); return 0; } |