Jiri Slaby | 14a21cd | 2008-06-23 23:31:09 +0200 | [diff] [blame] | 1 | /* |
| 2 | * HID driver for some a4tech "special" devices |
| 3 | * |
| 4 | * Copyright (c) 1999 Andreas Gal |
| 5 | * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> |
| 6 | * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc |
| 7 | * Copyright (c) 2006-2007 Jiri Kosina |
| 8 | * Copyright (c) 2007 Paul Walmsley |
| 9 | * Copyright (c) 2008 Jiri Slaby |
| 10 | */ |
| 11 | |
| 12 | /* |
| 13 | * This program is free software; you can redistribute it and/or modify it |
| 14 | * under the terms of the GNU General Public License as published by the Free |
| 15 | * Software Foundation; either version 2 of the License, or (at your option) |
| 16 | * any later version. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/device.h> |
| 20 | #include <linux/input.h> |
| 21 | #include <linux/hid.h> |
| 22 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.h> |
Jiri Slaby | 14a21cd | 2008-06-23 23:31:09 +0200 | [diff] [blame] | 24 | |
| 25 | #include "hid-ids.h" |
| 26 | |
| 27 | #define A4_2WHEEL_MOUSE_HACK_7 0x01 |
| 28 | #define A4_2WHEEL_MOUSE_HACK_B8 0x02 |
| 29 | |
| 30 | struct a4tech_sc { |
| 31 | unsigned long quirks; |
| 32 | unsigned int hw_wheel; |
| 33 | __s32 delayed_value; |
| 34 | }; |
| 35 | |
| 36 | static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi, |
| 37 | struct hid_field *field, struct hid_usage *usage, |
| 38 | unsigned long **bit, int *max) |
| 39 | { |
| 40 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); |
| 41 | |
| 42 | if (usage->type == EV_REL && usage->code == REL_WHEEL) |
| 43 | set_bit(REL_HWHEEL, *bit); |
| 44 | |
| 45 | if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) |
| 46 | return -1; |
| 47 | |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | static int a4_event(struct hid_device *hdev, struct hid_field *field, |
| 52 | struct hid_usage *usage, __s32 value) |
| 53 | { |
| 54 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); |
| 55 | struct input_dev *input; |
| 56 | |
| 57 | if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || |
| 58 | !usage->type) |
| 59 | return 0; |
| 60 | |
| 61 | input = field->hidinput->input; |
| 62 | |
| 63 | if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) { |
| 64 | if (usage->type == EV_REL && usage->code == REL_WHEEL) { |
| 65 | a4->delayed_value = value; |
| 66 | return 1; |
| 67 | } |
| 68 | |
| 69 | if (usage->hid == 0x000100b8) { |
| 70 | input_event(input, EV_REL, value ? REL_HWHEEL : |
| 71 | REL_WHEEL, a4->delayed_value); |
| 72 | return 1; |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) { |
| 77 | a4->hw_wheel = !!value; |
| 78 | return 1; |
| 79 | } |
| 80 | |
| 81 | if (usage->code == REL_WHEEL && a4->hw_wheel) { |
| 82 | input_event(input, usage->type, REL_HWHEEL, value); |
| 83 | return 1; |
| 84 | } |
| 85 | |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id) |
| 90 | { |
| 91 | struct a4tech_sc *a4; |
| 92 | int ret; |
| 93 | |
| 94 | a4 = kzalloc(sizeof(*a4), GFP_KERNEL); |
| 95 | if (a4 == NULL) { |
| 96 | dev_err(&hdev->dev, "can't alloc device descriptor\n"); |
| 97 | ret = -ENOMEM; |
| 98 | goto err_free; |
| 99 | } |
| 100 | |
| 101 | a4->quirks = id->driver_data; |
| 102 | |
| 103 | hid_set_drvdata(hdev, a4); |
| 104 | |
| 105 | ret = hid_parse(hdev); |
| 106 | if (ret) { |
| 107 | dev_err(&hdev->dev, "parse failed\n"); |
| 108 | goto err_free; |
| 109 | } |
| 110 | |
Jiri Slaby | 93c1013 | 2008-06-27 00:04:24 +0200 | [diff] [blame] | 111 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
Jiri Slaby | 14a21cd | 2008-06-23 23:31:09 +0200 | [diff] [blame] | 112 | if (ret) { |
| 113 | dev_err(&hdev->dev, "hw start failed\n"); |
| 114 | goto err_free; |
| 115 | } |
| 116 | |
| 117 | return 0; |
| 118 | err_free: |
| 119 | kfree(a4); |
| 120 | return ret; |
| 121 | } |
| 122 | |
| 123 | static void a4_remove(struct hid_device *hdev) |
| 124 | { |
| 125 | struct a4tech_sc *a4 = hid_get_drvdata(hdev); |
| 126 | |
| 127 | hid_hw_stop(hdev); |
| 128 | kfree(a4); |
| 129 | } |
| 130 | |
| 131 | static const struct hid_device_id a4_devices[] = { |
| 132 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU), |
| 133 | .driver_data = A4_2WHEEL_MOUSE_HACK_7 }, |
| 134 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D), |
| 135 | .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, |
Lech Perczak | b7e1b20 | 2010-09-16 23:19:33 +0200 | [diff] [blame] | 136 | { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649), |
| 137 | .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, |
Jiri Slaby | 14a21cd | 2008-06-23 23:31:09 +0200 | [diff] [blame] | 138 | { } |
| 139 | }; |
| 140 | MODULE_DEVICE_TABLE(hid, a4_devices); |
| 141 | |
| 142 | static struct hid_driver a4_driver = { |
| 143 | .name = "a4tech", |
| 144 | .id_table = a4_devices, |
| 145 | .input_mapped = a4_input_mapped, |
| 146 | .event = a4_event, |
| 147 | .probe = a4_probe, |
| 148 | .remove = a4_remove, |
| 149 | }; |
| 150 | |
Peter Huewe | a24f423b | 2009-07-02 19:08:38 +0200 | [diff] [blame] | 151 | static int __init a4_init(void) |
Jiri Slaby | 14a21cd | 2008-06-23 23:31:09 +0200 | [diff] [blame] | 152 | { |
| 153 | return hid_register_driver(&a4_driver); |
| 154 | } |
| 155 | |
Peter Huewe | a24f423b | 2009-07-02 19:08:38 +0200 | [diff] [blame] | 156 | static void __exit a4_exit(void) |
Jiri Slaby | 14a21cd | 2008-06-23 23:31:09 +0200 | [diff] [blame] | 157 | { |
| 158 | hid_unregister_driver(&a4_driver); |
| 159 | } |
| 160 | |
| 161 | module_init(a4_init); |
| 162 | module_exit(a4_exit); |
| 163 | MODULE_LICENSE("GPL"); |