Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / hid / hid-a4tech.c

diff --git a/kernel/drivers/hid/hid-a4tech.c b/kernel/drivers/hid/hid-a4tech.c
new file mode 100644 (file)
index 0000000..9428ea7
--- /dev/null
+++ b/kernel/drivers/hid/hid-a4tech.c
@@ -0,0 +1,138 @@
+/*
+ *  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) 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 <linux/slab.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 = devm_kzalloc(&hdev->dev, sizeof(*a4), GFP_KERNEL);
+       if (a4 == NULL) {
+               hid_err(hdev, "can't alloc device descriptor\n");
+               return -ENOMEM;
+       }
+
+       a4->quirks = id->driver_data;
+
+       hid_set_drvdata(hdev, a4);
+
+       ret = hid_parse(hdev);
+       if (ret) {
+               hid_err(hdev, "parse failed\n");
+               return ret;
+       }
+
+       ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+       if (ret) {
+               hid_err(hdev, "hw start failed\n");
+               return ret;
+       }
+
+       return 0;
+}
+
+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 },
+       { HID_USB_DEVICE(USB_VENDOR_ID_A4TECH, USB_DEVICE_ID_A4TECH_RP_649),
+               .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,
+};
+module_hid_driver(a4_driver);
+
+MODULE_LICENSE("GPL");