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-rw-r--r--drivers/hid/hid-gaff.c172
1 files changed, 172 insertions, 0 deletions
diff --git a/drivers/hid/hid-gaff.c b/drivers/hid/hid-gaff.c
new file mode 100644
index 000000000..ecbd3995a
--- /dev/null
+++ b/drivers/hid/hid-gaff.c
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Force feedback support for GreenAsia (Product ID 0x12) based devices
+ *
+ * The devices are distributed under various names and the same USB device ID
+ * can be used in many game controllers.
+ *
+ * 0e8f:0012 "GreenAsia Inc. USB Joystick "
+ * - tested with MANTA Warior MM816 and SpeedLink Strike2 SL-6635.
+ *
+ * Copyright (c) 2008 Lukasz Lubojanski <lukasz@lubojanski.info>
+ */
+
+/*
+ */
+
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/hid.h>
+#include <linux/module.h>
+#include "hid-ids.h"
+
+#ifdef CONFIG_GREENASIA_FF
+
+struct gaff_device {
+ struct hid_report *report;
+};
+
+static int hid_gaff_play(struct input_dev *dev, void *data,
+ struct ff_effect *effect)
+{
+ struct hid_device *hid = input_get_drvdata(dev);
+ struct gaff_device *gaff = data;
+ int left, right;
+
+ left = effect->u.rumble.strong_magnitude;
+ right = effect->u.rumble.weak_magnitude;
+
+ dbg_hid("called with 0x%04x 0x%04x", left, right);
+
+ left = left * 0xfe / 0xffff;
+ right = right * 0xfe / 0xffff;
+
+ gaff->report->field[0]->value[0] = 0x51;
+ gaff->report->field[0]->value[1] = 0x0;
+ gaff->report->field[0]->value[2] = right;
+ gaff->report->field[0]->value[3] = 0;
+ gaff->report->field[0]->value[4] = left;
+ gaff->report->field[0]->value[5] = 0;
+ dbg_hid("running with 0x%02x 0x%02x", left, right);
+ hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT);
+
+ gaff->report->field[0]->value[0] = 0xfa;
+ gaff->report->field[0]->value[1] = 0xfe;
+ gaff->report->field[0]->value[2] = 0x0;
+ gaff->report->field[0]->value[4] = 0x0;
+
+ hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT);
+
+ return 0;
+}
+
+static int gaff_init(struct hid_device *hid)
+{
+ struct gaff_device *gaff;
+ struct hid_report *report;
+ struct hid_input *hidinput;
+ struct list_head *report_list =
+ &hid->report_enum[HID_OUTPUT_REPORT].report_list;
+ struct list_head *report_ptr = report_list;
+ 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;
+
+ if (list_empty(report_list)) {
+ hid_err(hid, "no output reports found\n");
+ return -ENODEV;
+ }
+
+ report_ptr = report_ptr->next;
+
+ report = list_entry(report_ptr, struct hid_report, list);
+ if (report->maxfield < 1) {
+ hid_err(hid, "no fields in the report\n");
+ return -ENODEV;
+ }
+
+ if (report->field[0]->report_count < 6) {
+ hid_err(hid, "not enough values in the field\n");
+ return -ENODEV;
+ }
+
+ gaff = kzalloc(sizeof(struct gaff_device), GFP_KERNEL);
+ if (!gaff)
+ return -ENOMEM;
+
+ set_bit(FF_RUMBLE, dev->ffbit);
+
+ error = input_ff_create_memless(dev, gaff, hid_gaff_play);
+ if (error) {
+ kfree(gaff);
+ return error;
+ }
+
+ gaff->report = report;
+ gaff->report->field[0]->value[0] = 0x51;
+ gaff->report->field[0]->value[1] = 0x00;
+ gaff->report->field[0]->value[2] = 0x00;
+ gaff->report->field[0]->value[3] = 0x00;
+ hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT);
+
+ gaff->report->field[0]->value[0] = 0xfa;
+ gaff->report->field[0]->value[1] = 0xfe;
+
+ hid_hw_request(hid, gaff->report, HID_REQ_SET_REPORT);
+
+ hid_info(hid, "Force Feedback for GreenAsia 0x12 devices by Lukasz Lubojanski <lukasz@lubojanski.info>\n");
+
+ return 0;
+}
+#else
+static inline int gaff_init(struct hid_device *hdev)
+{
+ return 0;
+}
+#endif
+
+static int ga_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+ int ret;
+
+ dev_dbg(&hdev->dev, "Greenasia HID hardware probe...");
+
+ 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;
+ }
+
+ gaff_init(hdev);
+
+ return 0;
+err:
+ return ret;
+}
+
+static const struct hid_device_id ga_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0012), },
+ { }
+};
+MODULE_DEVICE_TABLE(hid, ga_devices);
+
+static struct hid_driver ga_driver = {
+ .name = "greenasia",
+ .id_table = ga_devices,
+ .probe = ga_probe,
+};
+module_hid_driver(ga_driver);
+
+MODULE_LICENSE("GPL");