HID: Add new force feedback driver for Mayflash game controller adapters
Add a new module named hid-mf that implements force feedback for game
controller adapters manufactured by Mayflash. Currently only the PS3 adapter is
supported, other adapters still need to be tested.
Signed-off-by: Marcel Hasler <mahasler@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-mf.c b/drivers/hid/hid-mf.c
new file mode 100644
index 0000000..d909076
--- /dev/null
+++ b/drivers/hid/hid-mf.c
@@ -0,0 +1,166 @@
+/*
+ * Force feedback support for Mayflash game controller adapters.
+ *
+ * These devices are manufactured by Mayflash but identify themselves
+ * using the vendor ID of DragonRise Inc.
+ *
+ * Tested with:
+ * 0079:1801 "DragonRise Inc. Mayflash PS3 Game Controller Adapter"
+ *
+ * The following adapters probably work too, but need to be tested:
+ * 0079:1800 "DragonRise Inc. Mayflash WIIU Game Controller Adapter"
+ * 0079:1843 "DragonRise Inc. Mayflash GameCube Game Controller Adapter"
+ *
+ * Copyright (c) 2016 Marcel Hasler <mahasler@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.
+ */
+
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+
+#include "hid-ids.h"
+
+struct mf_device {
+ struct hid_report *report;
+};
+
+static int mf_play(struct input_dev *dev, void *data, struct ff_effect *effect)
+{
+ struct hid_device *hid = input_get_drvdata(dev);
+ struct mf_device *mf = data;
+ int strong, weak;
+
+ strong = effect->u.rumble.strong_magnitude;
+ weak = effect->u.rumble.weak_magnitude;
+
+ dbg_hid("Called with 0x%04x 0x%04x.\n", strong, weak);
+
+ strong = strong * 0xff / 0xffff;
+ weak = weak * 0xff / 0xffff;
+
+ dbg_hid("Running with 0x%02x 0x%02x.\n", strong, weak);
+
+ mf->report->field[0]->value[0] = weak;
+ mf->report->field[0]->value[1] = strong;
+ hid_hw_request(hid, mf->report, HID_REQ_SET_REPORT);
+
+ return 0;
+}
+
+static int mf_init(struct hid_device *hid)
+{
+ struct mf_device *mf;
+
+ struct list_head *report_list =
+ &hid->report_enum[HID_OUTPUT_REPORT].report_list;
+
+ struct list_head *report_ptr;
+ struct hid_report *report;
+
+ struct list_head *input_ptr = &hid->inputs;
+ struct hid_input *input;
+
+ struct input_dev *dev;
+
+ int error;
+
+ /* Setup each of the four inputs */
+ list_for_each(report_ptr, report_list) {
+ report = list_entry(report_ptr, struct hid_report, list);
+
+ if (report->maxfield < 1 || report->field[0]->report_count < 2) {
+ hid_err(hid, "Invalid report, this should never happen!\n");
+ return -ENODEV;
+ }
+
+ if (list_is_last(input_ptr, &hid->inputs)) {
+ hid_err(hid, "Missing input, this should never happen!\n");
+ return -ENODEV;
+ }
+
+ input_ptr = input_ptr->next;
+ input = list_entry(input_ptr, struct hid_input, list);
+
+ mf = kzalloc(sizeof(struct mf_device), GFP_KERNEL);
+ if (!mf)
+ return -ENOMEM;
+
+ dev = input->input;
+ set_bit(FF_RUMBLE, dev->ffbit);
+
+ error = input_ff_create_memless(dev, mf, mf_play);
+ if (error) {
+ kfree(mf);
+ return error;
+ }
+
+ mf->report = report;
+ mf->report->field[0]->value[0] = 0x00;
+ mf->report->field[0]->value[1] = 0x00;
+ hid_hw_request(hid, mf->report, HID_REQ_SET_REPORT);
+ }
+
+ hid_info(hid, "Force feedback for HJZ Mayflash game controller "
+ "adapters by Marcel Hasler <mahasler@gmail.com>\n");
+
+ return 0;
+}
+
+static int mf_probe(struct hid_device *hid, const struct hid_device_id *id)
+{
+ int error;
+
+ dev_dbg(&hid->dev, "Mayflash HID hardware probe...\n");
+
+ /* Split device into four inputs */
+ hid->quirks |= HID_QUIRK_MULTI_INPUT;
+
+ error = hid_parse(hid);
+ if (error) {
+ hid_err(hid, "HID parse failed.\n");
+ return error;
+ }
+
+ error = hid_hw_start(hid, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
+ if (error) {
+ hid_err(hid, "HID hw start failed\n");
+ return error;
+ }
+
+ error = mf_init(hid);
+ if (error) {
+ hid_err(hid, "Force feedback init failed.\n");
+ hid_hw_stop(hid);
+ return error;
+ }
+
+ return 0;
+}
+
+static const struct hid_device_id mf_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, USB_DEVICE_ID_DRAGONRISE_PS3), },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, mf_devices);
+
+static struct hid_driver mf_driver = {
+ .name = "hid_mf",
+ .id_table = mf_devices,
+ .probe = mf_probe,
+};
+module_hid_driver(mf_driver);
+
+MODULE_LICENSE("GPL");