HID: move thrustmaster FF processing

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 267 insertions, 0 deletions

diff --git a/drivers/hid/hid-tmff.c b/drivers/hid/hid-tmff.c
new file mode 100644
index 000000000000..be7ebe286a16
--- /dev/null
+++ b/drivers/hid/hid-tmff.c
@@ -0,0 +1,267 @@
+/*
+ * Force feedback support for various HID compliant devices by ThrustMaster:
+ *    ThrustMaster FireStorm Dual Power 2
+ * and possibly others whose device ids haven't been added.
+ *
+ *  Modified to support ThrustMaster devices by Zinx Verituse
+ *  on 2003-01-25 from the Logitech force feedback driver,
+ *  which is by Johann Deneux.
+ *
+ *  Copyright (c) 2003 Zinx Verituse <zinx@epicsol.org>
+ *  Copyright (c) 2002 Johann Deneux
+ */
+
+/*
+ * 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"
+
+/* Usages for thrustmaster devices I know about */
+#define THRUSTMASTER_USAGE_FF	(HID_UP_GENDESK | 0xbb)
+
+static const signed short ff_rumble[] = {
+	FF_RUMBLE,
+	-1
+};
+
+static const signed short ff_joystick[] = {
+	FF_CONSTANT,
+	-1
+};
+
+struct tmff_device {
+	struct hid_report *report;
+	struct hid_field *ff_field;
+};
+
+/* Changes values from 0 to 0xffff into values from minimum to maximum */
+static inline int tmff_scale_u16(unsigned int in, int minimum, int maximum)
+{
+	int ret;
+
+	ret = (in * (maximum - minimum) / 0xffff) + minimum;
+	if (ret < minimum)
+		return minimum;
+	if (ret > maximum)
+		return maximum;
+	return ret;
+}
+
+/* Changes values from -0x80 to 0x7f into values from minimum to maximum */
+static inline int tmff_scale_s8(int in, int minimum, int maximum)
+{
+	int ret;
+
+	ret = (((in + 0x80) * (maximum - minimum)) / 0xff) + minimum;
+	if (ret < minimum)
+		return minimum;
+	if (ret > maximum)
+		return maximum;
+	return ret;
+}
+
+static int tmff_play(struct input_dev *dev, void *data,
+		struct ff_effect *effect)
+{
+	struct hid_device *hid = input_get_drvdata(dev);
+	struct tmff_device *tmff = data;
+	struct hid_field *ff_field = tmff->ff_field;
+	int x, y;
+	int left, right;	/* Rumbling */
+
+	switch (effect->type) {
+	case FF_CONSTANT:
+		x = tmff_scale_s8(effect->u.ramp.start_level,
+					ff_field->logical_minimum,
+					ff_field->logical_maximum);
+		y = tmff_scale_s8(effect->u.ramp.end_level,
+					ff_field->logical_minimum,
+					ff_field->logical_maximum);
+
+		dbg_hid("(x, y)=(%04x, %04x)\n", x, y);
+		ff_field->value[0] = x;
+		ff_field->value[1] = y;
+		usbhid_submit_report(hid, tmff->report, USB_DIR_OUT);
+		break;
+
+	case FF_RUMBLE:
+		left = tmff_scale_u16(effect->u.rumble.weak_magnitude,
+					ff_field->logical_minimum,
+					ff_field->logical_maximum);
+		right = tmff_scale_u16(effect->u.rumble.strong_magnitude,
+					ff_field->logical_minimum,
+					ff_field->logical_maximum);
+
+		dbg_hid("(left,right)=(%08x, %08x)\n", left, right);
+		ff_field->value[0] = left;
+		ff_field->value[1] = right;
+		usbhid_submit_report(hid, tmff->report, USB_DIR_OUT);
+		break;
+	}
+	return 0;
+}
+
+static int tmff_init(struct hid_device *hid, const signed short *ff_bits)
+{
+	struct tmff_device *tmff;
+	struct hid_report *report;
+	struct list_head *report_list;
+	struct hid_input *hidinput = list_entry(hid->inputs.next,
+							struct hid_input, list);
+	struct input_dev *input_dev = hidinput->input;
+	int error;
+	int i;
+
+	tmff = kzalloc(sizeof(struct tmff_device), GFP_KERNEL);
+	if (!tmff)
+		return -ENOMEM;
+
+	/* Find the report to use */
+	report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
+	list_for_each_entry(report, report_list, list) {
+		int fieldnum;
+
+		for (fieldnum = 0; fieldnum < report->maxfield; ++fieldnum) {
+			struct hid_field *field = report->field[fieldnum];
+
+			if (field->maxusage <= 0)
+				continue;
+
+			switch (field->usage[0].hid) {
+			case THRUSTMASTER_USAGE_FF:
+				if (field->report_count < 2) {
+					warn("ignoring FF field with "
+							"report_count < 2");
+					continue;
+				}
+
+				if (field->logical_maximum ==
+						field->logical_minimum) {
+					warn("ignoring FF field with "
+							"logical_maximum == "
+							"logical_minimum");
+					continue;
+				}
+
+				if (tmff->report && tmff->report != report) {
+					warn("ignoring FF field in other "
+							"report");
+					continue;
+				}
+
+				if (tmff->ff_field && tmff->ff_field != field) {
+					warn("ignoring duplicate FF field");
+					continue;
+				}
+
+				tmff->report = report;
+				tmff->ff_field = field;
+
+				for (i = 0; ff_bits[i] >= 0; i++)
+					set_bit(ff_bits[i], input_dev->ffbit);
+
+				break;
+
+			default:
+				warn("ignoring unknown output usage %08x",
+						field->usage[0].hid);
+				continue;
+			}
+		}
+	}
+
+	if (!tmff->report) {
+		err("cant find FF field in output reports\n");
+		error = -ENODEV;
+		goto fail;
+	}
+
+	error = input_ff_create_memless(input_dev, tmff, tmff_play);
+	if (error)
+		goto fail;
+
+	info("Force feedback for ThrustMaster devices by Zinx Verituse "
+			"<zinx@epicsol.org>");
+	return 0;
+
+fail:
+	kfree(tmff);
+	return error;
+}
+
+static int tm_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;
+	}
+
+	tmff_init(hdev, (void *)id->driver_data);
+
+	return 0;
+err:
+	return ret;
+}
+
+static const struct hid_device_id tm_devices[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300),
+		.driver_data = (unsigned long)ff_rumble },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304),
+		.driver_data = (unsigned long)ff_rumble },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb651),	/* FGT Rumble Force Wheel */
+		.driver_data = (unsigned long)ff_rumble },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654),	/* FGT Force Feedback Wheel */
+		.driver_data = (unsigned long)ff_joystick },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, tm_devices);
+
+static struct hid_driver tm_driver = {
+	.name = "thrustmaster",
+	.id_table = tm_devices,
+	.probe = tm_probe,
+};
+
+static int tm_init(void)
+{
+	return hid_register_driver(&tm_driver);
+}
+
+static void tm_exit(void)
+{
+	hid_unregister_driver(&tm_driver);
+}
+
+module_init(tm_init);
+module_exit(tm_exit);
+MODULE_LICENSE("GPL");
+
+HID_COMPAT_LOAD_DRIVER(thrustmaster);