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Date: Wed, 20 Apr 2022 21:40:41 -0500
From: frank zago <frank@...o.net>
To: Jiri Kosina <jikos@...nel.org>,
Benjamin Tissoires <benjamin.tissoires@...hat.com>,
linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
frank zago <frank@...o.net>
Subject: [PATCH v2] HID: Add support for Mega World controller force feedback
This patch adds support for one of the several Mega World USB game
controller with integrated force feedback. It is a HID based
memory-less game controller, with a weak motor on the left, and a
strong one on the right.
Signed-off-by: frank zago <frank@...o.net>
---
Changes from v1:
- Removed one superfluous config option which reduced the code size a little
drivers/hid/Kconfig | 8 +++
drivers/hid/Makefile | 1 +
drivers/hid/hid-ids.h | 3 +
drivers/hid/hid-megaworld.c | 125 ++++++++++++++++++++++++++++++++++++
4 files changed, 137 insertions(+)
create mode 100644 drivers/hid/hid-megaworld.c
diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index a95a7cbc4a59..70da5931082f 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -697,6 +697,14 @@ config HID_MAYFLASH
Say Y here if you have HJZ Mayflash PS3 game controller adapters
and want to enable force feedback support.
+config HID_MEGAWORLD_FF
+ tristate "Mega World based game controller force feedback support"
+ depends on USB_HID
+ select INPUT_FF_MEMLESS
+ help
+ Say Y here if you have a Mega World based game controller and want
+ to have force feedback support for it.
+
config HID_REDRAGON
tristate "Redragon keyboards"
depends on HID
diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
index 345ac5581bd8..cac2cbe26d11 100644
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -77,6 +77,7 @@ obj-$(CONFIG_HID_MAGICMOUSE) += hid-magicmouse.o
obj-$(CONFIG_HID_MALTRON) += hid-maltron.o
obj-$(CONFIG_HID_MCP2221) += hid-mcp2221.o
obj-$(CONFIG_HID_MAYFLASH) += hid-mf.o
+obj-$(CONFIG_HID_MEGAWORLD_FF) += hid-megaworld.o
obj-$(CONFIG_HID_MICROSOFT) += hid-microsoft.o
obj-$(CONFIG_HID_MONTEREY) += hid-monterey.o
obj-$(CONFIG_HID_MULTITOUCH) += hid-multitouch.o
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 053853a891c5..b9e0f3deb080 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -868,6 +868,9 @@
#define USB_VENDOR_ID_MCS 0x16d0
#define USB_DEVICE_ID_MCS_GAMEPADBLOCK 0x0bcc
+#define USB_VENDOR_MEGAWORLD 0x07b5
+#define USB_DEVICE_ID_MEGAWORLD_GAMEPAD 0x0312
+
#define USB_VENDOR_ID_MGE 0x0463
#define USB_DEVICE_ID_MGE_UPS 0xffff
#define USB_DEVICE_ID_MGE_UPS1 0x0001
diff --git a/drivers/hid/hid-megaworld.c b/drivers/hid/hid-megaworld.c
new file mode 100644
index 000000000000..599657863cb9
--- /dev/null
+++ b/drivers/hid/hid-megaworld.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Vibration support for Mega World controllers
+ *
+ * Copyright 2022 Frank Zago
+ *
+ * Derived from hid-zpff.c:
+ * Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@...il.com>
+ */
+
+#include <linux/hid.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include "hid-ids.h"
+
+struct mwctrl_device {
+ struct hid_report *report;
+ s32 *weak;
+ s32 *strong;
+};
+
+static int mwctrl_play(struct input_dev *dev, void *data,
+ struct ff_effect *effect)
+{
+ struct hid_device *hid = input_get_drvdata(dev);
+ struct mwctrl_device *mwctrl = data;
+
+ *mwctrl->strong = effect->u.rumble.strong_magnitude >> 8;
+ *mwctrl->weak = effect->u.rumble.weak_magnitude >> 8;
+
+ hid_hw_request(hid, mwctrl->report, HID_REQ_SET_REPORT);
+
+ return 0;
+}
+
+static int mwctrl_init(struct hid_device *hid)
+{
+ struct mwctrl_device *mwctrl;
+ struct hid_report *report;
+ struct hid_input *hidinput;
+ struct input_dev *dev;
+ int error;
+ int i;
+
+ 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;
+
+ for (i = 0; i < 4; i++) {
+ report = hid_validate_values(hid, HID_OUTPUT_REPORT, 0, i, 1);
+ if (!report)
+ return -ENODEV;
+ }
+
+ mwctrl = kzalloc(sizeof(struct mwctrl_device), GFP_KERNEL);
+ if (!mwctrl)
+ return -ENOMEM;
+
+ set_bit(FF_RUMBLE, dev->ffbit);
+
+ error = input_ff_create_memless(dev, mwctrl, mwctrl_play);
+ if (error) {
+ kfree(mwctrl);
+ return error;
+ }
+
+ mwctrl->report = report;
+
+ /* Field 0 is always 2, and field 1 is always 0. The original
+ * windows driver has a 5 bytes command, where the 5th byte is
+ * a repeat of the 3rd byte, however the device has only 4
+ * fields. It could be a bug in the driver, or there is a
+ * different device that needs it.
+ */
+ report->field[0]->value[0] = 0x02;
+
+ mwctrl->strong = &report->field[2]->value[0];
+ mwctrl->weak = &report->field[3]->value[0];
+
+ return 0;
+}
+
+static int mwctrl_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+ int ret;
+
+ ret = hid_parse(hdev);
+ if (ret) {
+ hid_err(hdev, "parse failed\n");
+ return ret;
+ }
+
+ ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
+ if (ret) {
+ hid_err(hdev, "hw start failed\n");
+ return ret;
+ }
+
+ ret = mwctrl_init(hdev);
+ if (ret)
+ hid_hw_stop(hdev);
+
+ return ret;
+}
+
+static const struct hid_device_id mwctrl_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_MEGAWORLD,
+ USB_DEVICE_ID_MEGAWORLD_GAMEPAD) },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, mwctrl_devices);
+
+static struct hid_driver mwctrl_driver = {
+ .name = "megaworld",
+ .id_table = mwctrl_devices,
+ .probe = mwctrl_probe,
+};
+module_hid_driver(mwctrl_driver);
+
+MODULE_LICENSE("GPL");
--
2.32.0
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