HID: betop: add drivers/hid/hid-betopff.c

Commit fc38a8a66e ("HID: add BETOP game controller force feedback support")
is missing the actual addition of drivers/hid/hid-betopff.c due to my
mistake (I forgot to add the file after fixing conflicts).

Fixes: fc38a8a66e1b ("HID: add BETOP game controller force feedback support")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 160 insertions, 0 deletions

diff --git a/drivers/hid/hid-betopff.c b/drivers/hid/hid-betopff.c
new file mode 100644
index 000000000000..69cfc8dc6af1
--- /dev/null
+++ b/drivers/hid/hid-betopff.c
@@ -0,0 +1,160 @@
+/*
+ *  Force feedback support for Betop based devices
+ *
+ *  The devices are distributed under various names and the same USB device ID
+ *  can be used in both adapters and actual game controllers.
+ *
+ *  0x11c2:0x2208 "BTP2185 BFM mode Joystick"
+ *   - tested with BTP2185 BFM Mode.
+ *
+ *  0x11C0:0x5506 "BTP2185 PC mode Joystick"
+ *   - tested with BTP2185 PC Mode.
+ *
+ *  0x8380:0x1850 "BTP2185 V2 PC mode USB Gamepad"
+ *   - tested with BTP2185 PC Mode with another version.
+ *
+ *  0x20bc:0x5500 "BTP2185 V2 BFM mode Joystick"
+ *   - tested with BTP2171s.
+ *  Copyright (c) 2014 Huang Bo <huangbobupt@163.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.
+ */
+
+
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/hid.h>
+
+#include "hid-ids.h"
+
+struct betopff_device {
+        struct hid_report *report;
+};
+
+static int hid_betopff_play(struct input_dev *dev, void *data,
+                         struct ff_effect *effect)
+{
+        struct hid_device *hid = input_get_drvdata(dev);
+        struct betopff_device *betopff = data;
+        __u16 left, right;
+
+        left = effect->u.rumble.strong_magnitude;
+        right = effect->u.rumble.weak_magnitude;
+
+        betopff->report->field[2]->value[0] = left / 256;
+        betopff->report->field[3]->value[0] = right / 256;
+
+        hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
+
+        return 0;
+}
+
+static int betopff_init(struct hid_device *hid)
+{
+        struct betopff_device *betopff;
+        struct hid_report *report;
+        struct hid_input *hidinput =
+                        list_first_entry(&hid->inputs, struct hid_input, list);
+        struct list_head *report_list =
+                        &hid->report_enum[HID_OUTPUT_REPORT].report_list;
+        struct input_dev *dev = hidinput->input;
+        int field_count = 0;
+        int error;
+        int i, j;
+
+        if (list_empty(report_list)) {
+                hid_err(hid, "no output reports found\n");
+                return -ENODEV;
+        }
+
+        report = list_first_entry(report_list, struct hid_report, list);
+        /*
+         * Actually there are 4 fields for 4 Bytes as below:
+         * -----------------------------------------
+         * Byte0  Byte1  Byte2    Byte3
+         * 0x00   0x00   left_motor right_motor
+         * -----------------------------------------
+         * Do init them with default value.
+         */
+        for (i = 0; i < report->maxfield; i++) {
+                for (j = 0; j < report->field[i]->report_count; j++) {
+                        report->field[i]->value[j] = 0x00;
+                        field_count++;
+                }
+        }
+
+        if (field_count < 4) {
+                hid_err(hid, "not enough fields in the report: %d\n",
+                                field_count);
+                return -ENODEV;
+        }
+
+        betopff = kzalloc(sizeof(*betopff), GFP_KERNEL);
+        if (!betopff)
+                return -ENOMEM;
+
+        set_bit(FF_RUMBLE, dev->ffbit);
+
+        error = input_ff_create_memless(dev, betopff, hid_betopff_play);
+        if (error) {
+                kfree(betopff);
+                return error;
+        }
+
+        betopff->report = report;
+        hid_hw_request(hid, betopff->report, HID_REQ_SET_REPORT);
+
+        hid_info(hid, "Force feedback for betop devices by huangbo <huangbobupt@163.com>\n");
+
+        return 0;
+}
+
+static int betop_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+        int ret;
+
+        if (id->driver_data)
+                hdev->quirks |= HID_QUIRK_MULTI_INPUT;
+
+        ret = hid_parse(hdev);
+        if (ret) {
+                hid_err(hdev, "parse failed\n");
+                goto err;
+        }
+
+        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
+        if (ret) {
+                hid_err(hdev, "hw start failed\n");
+                goto err;
+        }
+
+        betopff_init(hdev);
+
+        return 0;
+err:
+        return ret;
+}
+
+static const struct hid_device_id betop_devices[] = {
+        { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185BFM, 0x2208) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185PC, 0x5506) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2PC, 0x1850) },
+        { HID_USB_DEVICE(USB_VENDOR_ID_BETOP_2185V2BFM, 0x5500) },
+        { }
+};
+MODULE_DEVICE_TABLE(hid, betop_devices);
+
+static struct hid_driver betop_driver = {
+        .name = "betop",
+        .id_table = betop_devices,
+        .probe = betop_probe,
+};
+module_hid_driver(betop_driver);
+
+MODULE_LICENSE("GPL");