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Diffstat (limited to 'drivers/hid/hid-lg2ff.c')
-rw-r--r--drivers/hid/hid-lg2ff.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/hid/hid-lg2ff.c b/drivers/hid/hid-lg2ff.c
new file mode 100644
index 0000000000..73d07e35f1
--- /dev/null
+++ b/drivers/hid/hid-lg2ff.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Force feedback support for Logitech RumblePad and Rumblepad 2
+ *
+ * Copyright (c) 2008 Anssi Hannula <anssi.hannula@gmail.com>
+ */
+
+/*
+ */
+
+
+#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;
+ struct input_dev *dev;
+ int error;
+
+ if (list_empty(&hid->inputs)) {
+ hid_err(hid, "no inputs found\n");
+ return -ENODEV;
+ }
+ hidinput = list_entry(hid->inputs.next, struct hid_input, list);
+ dev = hidinput->input;
+
+ /* 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;
+}