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author | Ignaz Forster <ignaz.forster@gmx.de> | 2010-11-01 15:13:37 -0400 |
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committer | Jiri Kosina <jkosina@suse.cz> | 2010-11-01 15:13:37 -0400 |
commit | 04561c5aa243c98cae93cde27e05740df787e692 (patch) | |
tree | a56fe4bb3da50b20e5724e53703c528cbf323d92 /drivers/hid/hid-emsff.c | |
parent | 229aebb873e29726b91e076161649cf45154b0bf (diff) | |
download | kernel_samsung_espresso10-04561c5aa243c98cae93cde27e05740df787e692.zip kernel_samsung_espresso10-04561c5aa243c98cae93cde27e05740df787e692.tar.gz kernel_samsung_espresso10-04561c5aa243c98cae93cde27e05740df787e692.tar.bz2 |
HID: Add Force Feedback support for EMS Trio Linker Plus II
The device has connections for GameCube, PlayStation 2 and Dreamcast
controllers, however Force Feedback is only supported for PS2 and GC
controllers.
When using a PS2 controller it may be necessary to press the "Analog" button to
enable support for both motors (this behavior is identical to the Windows
driver, I have found no way to avoid that).
Signed-off-by: Ignaz Forster <ignaz.forster@gmx.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-emsff.c')
-rw-r--r-- | drivers/hid/hid-emsff.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/hid/hid-emsff.c b/drivers/hid/hid-emsff.c new file mode 100644 index 0000000..c61b192 --- /dev/null +++ b/drivers/hid/hid-emsff.c @@ -0,0 +1,162 @@ +/* + * Force feedback support for EMS Trio Linker Plus II + * + * Copyright (c) 2010 Ignaz Forster <ignaz.forster@gmx.de> + */ + +/* + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + + +#include <linux/hid.h> +#include <linux/input.h> +#include <linux/usb.h> + +#include "hid-ids.h" +#include "usbhid/usbhid.h" + +struct emsff_device { + struct hid_report *report; +}; + +static int emsff_play(struct input_dev *dev, void *data, + struct ff_effect *effect) +{ + struct hid_device *hid = input_get_drvdata(dev); + struct emsff_device *emsff = data; + int weak, strong; + + weak = effect->u.rumble.weak_magnitude; + strong = effect->u.rumble.strong_magnitude; + + dbg_hid("called with 0x%04x 0x%04x\n", strong, weak); + + weak = weak * 0xff / 0xffff; + strong = strong * 0xff / 0xffff; + + emsff->report->field[0]->value[1] = weak; + emsff->report->field[0]->value[2] = strong; + + dbg_hid("running with 0x%02x 0x%02x\n", strong, weak); + usbhid_submit_report(hid, emsff->report, USB_DIR_OUT); + + return 0; +} + +static int emsff_init(struct hid_device *hid) +{ + struct emsff_device *emsff; + 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 error; + + if (list_empty(report_list)) { + dev_err(&hid->dev, "no output reports found\n"); + return -ENODEV; + } + + report = list_first_entry(report_list, struct hid_report, list); + if (report->maxfield < 1) { + dev_err(&hid->dev, "no fields in the report\n"); + return -ENODEV; + } + + if (report->field[0]->report_count < 7) { + dev_err(&hid->dev, "not enough values in the field\n"); + return -ENODEV; + } + + emsff = kzalloc(sizeof(struct emsff_device), GFP_KERNEL); + if (!emsff) + return -ENOMEM; + + set_bit(FF_RUMBLE, dev->ffbit); + + error = input_ff_create_memless(dev, emsff, emsff_play); + if (error) { + kfree(emsff); + return error; + } + + emsff->report = report; + emsff->report->field[0]->value[0] = 0x01; + emsff->report->field[0]->value[1] = 0x00; + emsff->report->field[0]->value[2] = 0x00; + emsff->report->field[0]->value[3] = 0x00; + emsff->report->field[0]->value[4] = 0x00; + emsff->report->field[0]->value[5] = 0x00; + emsff->report->field[0]->value[6] = 0x00; + usbhid_submit_report(hid, emsff->report, USB_DIR_OUT); + + dev_info(&hid->dev, "force feedback for EMS based devices by " + "Ignaz Forster <ignaz.forster@gmx.de>\n"); + + return 0; +} + +static int ems_probe(struct hid_device *hdev, const struct hid_device_id *id) +{ + int ret; + + ret = hid_parse(hdev); + if (ret) { + dev_err(&hdev->dev, "parse failed\n"); + goto err; + } + + ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); + if (ret) { + dev_err(&hdev->dev, "hw start failed\n"); + goto err; + } + + emsff_init(hdev); + + return 0; +err: + return ret; +} + +static const struct hid_device_id ems_devices[] = { + { HID_USB_DEVICE(USB_VENDOR_ID_EMS, 0x118) }, + { } +}; +MODULE_DEVICE_TABLE(hid, ems_devices); + +static struct hid_driver ems_driver = { + .name = "hkems", + .id_table = ems_devices, + .probe = ems_probe, +}; + +static int ems_init(void) +{ + return hid_register_driver(&ems_driver); +} + +static void ems_exit(void) +{ + hid_unregister_driver(&ems_driver); +} + +module_init(ems_init); +module_exit(ems_exit); +MODULE_LICENSE("GPL"); + |