Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / hid / hid-lg2ff.c

diff --git a/kernel/drivers/hid/hid-lg2ff.c b/kernel/drivers/hid/hid-lg2ff.c
new file mode 100644 (file)
index 0000000..0e3fb1a
--- /dev/null
+++ b/kernel/drivers/hid/hid-lg2ff.c
@@ -0,0 +1,101 @@
+/*
+ *  Force feedback support for Logitech RumblePad and Rumblepad 2
+ *
+ *  Copyright (c) 2008 Anssi Hannula <anssi.hannula@gmail.com>
+ */
+
+/*
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/hid.h>
+
+#include "hid-lg.h"
+
+struct lg2ff_device {
+       struct hid_report *report;
+};
+
+static int play_effect(struct input_dev *dev, void *data,
+                        struct ff_effect *effect)
+{
+       struct hid_device *hid = input_get_drvdata(dev);
+       struct lg2ff_device *lg2ff = data;
+       int weak, strong;
+
+       strong = effect->u.rumble.strong_magnitude;
+       weak = effect->u.rumble.weak_magnitude;
+
+       if (weak || strong) {
+               weak = weak * 0xff / 0xffff;
+               strong = strong * 0xff / 0xffff;
+
+               lg2ff->report->field[0]->value[0] = 0x51;
+               lg2ff->report->field[0]->value[2] = weak;
+               lg2ff->report->field[0]->value[4] = strong;
+       } else {
+               lg2ff->report->field[0]->value[0] = 0xf3;
+               lg2ff->report->field[0]->value[2] = 0x00;
+               lg2ff->report->field[0]->value[4] = 0x00;
+       }
+
+       hid_hw_request(hid, lg2ff->report, HID_REQ_SET_REPORT);
+       return 0;
+}
+
+int lg2ff_init(struct hid_device *hid)
+{
+       struct lg2ff_device *lg2ff;
+       struct hid_report *report;
+       struct hid_input *hidinput = list_entry(hid->inputs.next,
+                                               struct hid_input, list);
+       struct input_dev *dev = hidinput->input;
+       int error;
+
+       /* Check that the report looks ok */
+       report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7);
+       if (!report)
+               return -ENODEV;
+
+       lg2ff = kmalloc(sizeof(struct lg2ff_device), GFP_KERNEL);
+       if (!lg2ff)
+               return -ENOMEM;
+
+       set_bit(FF_RUMBLE, dev->ffbit);
+
+       error = input_ff_create_memless(dev, lg2ff, play_effect);
+       if (error) {
+               kfree(lg2ff);
+               return error;
+       }
+
+       lg2ff->report = report;
+       report->field[0]->value[0] = 0xf3;
+       report->field[0]->value[1] = 0x00;
+       report->field[0]->value[2] = 0x00;
+       report->field[0]->value[3] = 0x00;
+       report->field[0]->value[4] = 0x00;
+       report->field[0]->value[5] = 0x00;
+       report->field[0]->value[6] = 0x00;
+
+       hid_hw_request(hid, report, HID_REQ_SET_REPORT);
+
+       hid_info(hid, "Force feedback for Logitech variant 2 rumble devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
+
+       return 0;
+}