HID: force feedback driver for Logitech Rumblepad 2

Add force feedback support for Logitech Rumblepad 2.

Tested-By: Edgar Simo <bobbens@gmail.com>
Signed-off-by: Anssi Hannula <anssi.hannula@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 114 insertions, 0 deletions

diff --git a/drivers/hid/usbhid/hid-lg2ff.c b/drivers/hid/usbhid/hid-lg2ff.c
new file mode 100644
index 000000000000..d469bd0061c9
--- /dev/null
+++ b/drivers/hid/usbhid/hid-lg2ff.c
@@ -0,0 +1,114 @@
+/*
+ *  Force feedback support for Logitech 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/usb.h>
+#include <linux/hid.h>
+#include "usbhid.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;
+        }
+
+        usbhid_submit_report(hid, lg2ff->report, USB_DIR_OUT);
+        return 0;
+}
+
+int hid_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 list_head *report_list =
+                        &hid->report_enum[HID_OUTPUT_REPORT].report_list;
+        struct input_dev *dev = hidinput->input;
+        int error;
+
+        if (list_empty(report_list)) {
+                printk(KERN_ERR "hid-lg2ff: no output report found\n");
+                return -ENODEV;
+        }
+
+        report = list_entry(report_list->next, struct hid_report, list);
+
+        if (report->maxfield < 1) {
+                printk(KERN_ERR "hid-lg2ff: output report is empty\n");
+                return -ENODEV;
+        }
+        if (report->field[0]->report_count < 7) {
+                printk(KERN_ERR "hid-lg2ff: not enough values in the field\n");
+                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;
+
+        usbhid_submit_report(hid, report, USB_DIR_OUT);
+
+        printk(KERN_INFO "Force feedback for Logitech Rumblepad 2 by "
+               "Anssi Hannula <anssi.hannula@gmail.com>\n");
+
+        return 0;
+}