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@zago.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 7a674873d7947fc040b6c1513b52cba0f1fea88f..96750b3903449d5a4654323f19ffcf6daaf3e339 100644 (file)
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -686,6 +686,14 @@ 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 d5ce8d747b140b1af99e9d3ab9418ab06383cd9e..c2a2db163094747b03b0db548e83dbbb174bf020 100644 (file)
--- a/drivers/hid/Makefile
+++ b/drivers/hid/Makefile
@@ -76,6 +76,7 @@ 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 053853a891c50b07b55baae421275d382c332cfc..b9e0f3deb0801392ba4a389f6b3b13f01370a996 100644 (file)
--- 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 (file)
index 0000000..5996578
--- /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@gmail.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");