diff options
Diffstat (limited to 'drivers/hid/hid-a4tech.c')
| -rw-r--r-- | drivers/hid/hid-a4tech.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/hid/hid-a4tech.c b/drivers/hid/hid-a4tech.c new file mode 100644 index 000000000000..26e16083a1f1 --- /dev/null +++ b/drivers/hid/hid-a4tech.c @@ -0,0 +1,162 @@ +/* + * HID driver for some a4tech "special" devices + * + * Copyright (c) 1999 Andreas Gal + * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> + * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc + * Copyright (c) 2006-2007 Jiri Kosina + * Copyright (c) 2007 Paul Walmsley + * Copyright (c) 2008 Jiri Slaby + */ + +/* + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + */ + +#include <linux/device.h> +#include <linux/input.h> +#include <linux/hid.h> +#include <linux/module.h> + +#include "hid-ids.h" + +#define A4_2WHEEL_MOUSE_HACK_7 0x01 +#define A4_2WHEEL_MOUSE_HACK_B8 0x02 + +struct a4tech_sc { + unsigned long quirks; + unsigned int hw_wheel; + __s32 delayed_value; +}; + +static int a4_input_mapped(struct hid_device *hdev, struct hid_input *hi, + struct hid_field *field, struct hid_usage *usage, + unsigned long **bit, int *max) +{ + struct a4tech_sc *a4 = hid_get_drvdata(hdev); + + if (usage->type == EV_REL && usage->code == REL_WHEEL) + set_bit(REL_HWHEEL, *bit); + + if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) + return -1; + + return 0; +} + +static int a4_event(struct hid_device *hdev, struct hid_field *field, + struct hid_usage *usage, __s32 value) +{ + struct a4tech_sc *a4 = hid_get_drvdata(hdev); + struct input_dev *input; + + if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput || + !usage->type) + return 0; + + input = field->hidinput->input; + + if (a4->quirks & A4_2WHEEL_MOUSE_HACK_B8) { + if (usage->type == EV_REL && usage->code == REL_WHEEL) { + a4->delayed_value = value; + return 1; + } + + if (usage->hid == 0x000100b8) { + input_event(input, EV_REL, value ? REL_HWHEEL : + REL_WHEEL, a4->delayed_value); + return 1; + } + } + + if ((a4->quirks & A4_2WHEEL_MOUSE_HACK_7) && usage->hid == 0x00090007) { + a4->hw_wheel = !!value; + return 1; + } + + if (usage->code == REL_WHEEL && a4->hw_wheel) { + input_event(input, usage->type, REL_HWHEEL, value); + return 1; + } + + return 0; +} + +static int a4_probe(struct hid_device *hdev, const struct hid_device_id *id) +{ + struct a4tech_sc *a4; + int ret; + + a4 = kzalloc(sizeof(*a4), GFP_KERNEL); + if (a4 == NULL) { + dev_err(&hdev->dev, "can't alloc device descriptor\n"); + ret = -ENOMEM; + goto err_free; + } + + a4->quirks = id->driver_data; + + hid_set_drvdata(hdev, a4); + + ret = hid_parse(hdev); + if (ret) { + dev_err(&hdev->dev, "parse failed\n"); + goto err_free; + } + + ret = hid_hw_start(hdev); + if (ret) { + dev_err(&hdev->dev, "hw start failed\n"); + goto err_free; + } + + return 0; +err_free: + kfree(a4); + return ret; +} + +static void a4_remove(struct hid_device *hdev) +{ + struct a4tech_sc *a4 = hid_get_drvdata(hdev); + + hid_hw_stop(hdev); + kfree(a4); +} + +static const struct hid_device_id a4_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_WCP32PU), + .driver_data = A4_2WHEEL_MOUSE_HACK_7 }, + { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_X5_005D), + .driver_data = A4_2WHEEL_MOUSE_HACK_B8 }, + { } +}; +MODULE_DEVICE_TABLE(hid, a4_devices); + +static struct hid_driver a4_driver = { + .name = "a4tech", + .id_table = a4_devices, + .input_mapped = a4_input_mapped, + .event = a4_event, + .probe = a4_probe, + .remove = a4_remove, +}; + +static int a4_init(void) +{ + return hid_register_driver(&a4_driver); +} + +static void a4_exit(void) +{ + hid_unregister_driver(&a4_driver); +} + +module_init(a4_init); +module_exit(a4_exit); +MODULE_LICENSE("GPL"); + +HID_COMPAT_LOAD_DRIVER(a4tech); |