diff options
Diffstat (limited to 'drivers/hid/hid-gaff.c')
| -rw-r--r-- | drivers/hid/hid-gaff.c | 172 |
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"); |