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166 lines
4.1 KiB
166 lines
4.1 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* HID driver for some a4tech "special" devices |
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* |
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* Copyright (c) 1999 Andreas Gal |
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* Copyright (c) 2000-2005 Vojtech Pavlik <[email protected]> |
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* Copyright (c) 2005 Michael Haboustak <[email protected]> for Concept2, Inc |
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* Copyright (c) 2006-2007 Jiri Kosina |
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* Copyright (c) 2008 Jiri Slaby |
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*/ |
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/* |
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*/ |
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#include <linux/device.h> |
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#include <linux/input.h> |
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#include <linux/hid.h> |
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#include <linux/module.h> |
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#include <linux/slab.h> |
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#include "hid-ids.h" |
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#define A4_2WHEEL_MOUSE_HACK_7 0x01 |
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#define A4_2WHEEL_MOUSE_HACK_B8 0x02 |
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#define A4_WHEEL_ORIENTATION (HID_UP_GENDESK | 0x000000b8) |
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struct a4tech_sc { |
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unsigned long quirks; |
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unsigned int hw_wheel; |
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__s32 delayed_value; |
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}; |
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static int a4_input_mapping(struct hid_device *hdev, struct hid_input *hi, |
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struct hid_field *field, struct hid_usage *usage, |
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unsigned long **bit, int *max) |
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{ |
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struct a4tech_sc *a4 = hid_get_drvdata(hdev); |
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if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8 && |
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usage->hid == A4_WHEEL_ORIENTATION) { |
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/* |
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* We do not want to have this usage mapped to anything as it's |
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* nonstandard and doesn't really behave like an HID report. |
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* It's only selecting the orientation (vertical/horizontal) of |
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* the previous mouse wheel report. The input_events will be |
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* generated once both reports are recorded in a4_event(). |
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*/ |
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return -1; |
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} |
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return 0; |
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} |
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static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi, |
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struct hid_field *field, struct hid_usage *usage, |
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unsigned long **bit, int *max) |
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{ |
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struct a4tech_sc *a4 = hid_get_drvdata(hdev); |
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if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) { |
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set_bit(REL_HWHEEL, *bit); |
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set_bit(REL_HWHEEL_HI_RES, *bit); |
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} |
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if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) |
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return -1; |
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return 0; |
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} |
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static int a4_event(struct hid_device *hdev, struct hid_field *field, |
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struct hid_usage *usage, __s32 value) |
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{ |
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struct a4tech_sc *a4 = hid_get_drvdata(hdev); |
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struct input_dev *input; |
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if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput) |
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return 0; |
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input = field->hidinput->input; |
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if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) { |
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if (usage->type == EV_REL && usage->code == REL_WHEEL_HI_RES) { |
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a4->delayed_value = value; |
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return 1; |
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} |
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if (usage->hid == A4_WHEEL_ORIENTATION) { |
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input_event(input, EV_REL, value ? REL_HWHEEL : |
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REL_WHEEL, a4->delayed_value); |
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input_event(input, EV_REL, value ? REL_HWHEEL_HI_RES : |
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REL_WHEEL_HI_RES, a4->delayed_value * 120); |
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return 1; |
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} |
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} |
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if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) { |
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a4->hw_wheel = !!value; |
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return 1; |
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} |
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if (usage->code == REL_WHEEL_HI_RES && a4->hw_wheel) { |
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input_event(input, usage->type, REL_HWHEEL, value); |
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input_event(input, usage->type, REL_HWHEEL_HI_RES, value * 120); |
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return 1; |
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} |
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return 0; |
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} |
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static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id) |
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{ |
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struct a4tech_sc *a4; |
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int ret; |
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a4 = devm_kzalloc(&hdev->dev, sizeof(*a4), GFP_KERNEL); |
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if (a4 == NULL) { |
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hid_err(hdev, "can't alloc device descriptor\n"); |
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return -ENOMEM; |
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} |
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a4->quirks = id->driver_data; |
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hid_set_drvdata(hdev, a4); |
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ret = hid_parse(hdev); |
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if (ret) { |
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hid_err(hdev, "parse failed\n"); |
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return ret; |
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} |
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
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if (ret) { |
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hid_err(hdev, "hw start failed\n"); |
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return ret; |
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} |
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return 0; |
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} |
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static const struct hid_device_id a4_devices[] = { |
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{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU), |
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.driver_data = A4_2WHEEL_MOUSE_HACK_7 }, |
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{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D), |
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.driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, |
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{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649), |
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.driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, |
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{ HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_NB_95), |
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.driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(hid, a4_devices); |
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static struct hid_driver a4_driver = { |
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.name = "a4tech", |
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.id_table = a4_devices, |
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.input_mapping = a4_input_mapping, |
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.input_mapped = a4_input_mapped, |
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.event = a4_event, |
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.probe = a4_probe, |
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}; |
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module_hid_driver(a4_driver); |
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MODULE_LICENSE("GPL");
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