1 files changed, 147 insertions, 0 deletions

diff --git a/drivers/hid/usbhid/hid-tmff.c b/drivers/hid/usbhid/hid-tmff.c
new file mode 100644
index 000000000000..ab67331620d0
--- /dev/null
+++ b/drivers/hid/usbhid/hid-tmff.c
@@ -0,0 +1,147 @@
+/*
+ * 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/input.h>
+
+#undef DEBUG
+#include <linux/usb.h>
+
+#include <linux/hid.h>
+#include "usbhid.h"
+
+/* Usages for thrustmaster devices I know about */
+#define THRUSTMASTER_USAGE_RUMBLE_LR    (HID_UP_GENDESK | 0xbb)
+
+
+struct tmff_device {
+        struct hid_report *report;
+        struct hid_field *rumble;
+};
+
+/* Changes values from 0 to 0xffff into values from minimum to maximum */
+static inline int hid_tmff_scale(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;
+}
+
+static int hid_tmff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
+{
+        struct hid_device *hid = dev->private;
+        struct tmff_device *tmff = data;
+        int left, right;        /* Rumbling */
+
+        left = hid_tmff_scale(effect->u.rumble.weak_magnitude,
+                tmff->rumble->logical_minimum, tmff->rumble->logical_maximum);
+        right = hid_tmff_scale(effect->u.rumble.strong_magnitude,
+                tmff->rumble->logical_minimum, tmff->rumble->logical_maximum);
+
+        tmff->rumble->value[0] = left;
+        tmff->rumble->value[1] = right;
+        dbg("(left,right)=(%08x, %08x)", left, right);
+        usbhid_submit_report(hid, tmff->report, USB_DIR_OUT);
+
+        return 0;
+}
+
+int hid_tmff_init(struct hid_device *hid)
+{
+        struct tmff_device *tmff;
+        struct list_head *pos;
+        struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
+        struct input_dev *input_dev = hidinput->input;
+        int error;
+
+        tmff = kzalloc(sizeof(struct tmff_device), GFP_KERNEL);
+        if (!tmff)
+                return -ENOMEM;
+
+        /* Find the report to use */
+        __list_for_each(pos, &hid->report_enum[HID_OUTPUT_REPORT].report_list) {
+                struct hid_report *report = (struct hid_report *)pos;
+                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_RUMBLE_LR:
+                                        if (field->report_count < 2) {
+                                                warn("ignoring THRUSTMASTER_USAGE_RUMBLE_LR with report_count < 2");
+                                                continue;
+                                        }
+
+                                        if (field->logical_maximum == field->logical_minimum) {
+                                                warn("ignoring THRUSTMASTER_USAGE_RUMBLE_LR with logical_maximum == logical_minimum");
+                                                continue;
+                                        }
+
+                                        if (tmff->report && tmff->report != report) {
+                                                warn("ignoring THRUSTMASTER_USAGE_RUMBLE_LR in other report");
+                                                continue;
+                                        }
+
+                                        if (tmff->rumble && tmff->rumble != field) {
+                                                warn("ignoring duplicate THRUSTMASTER_USAGE_RUMBLE_LR");
+                                                continue;
+                                        }
+
+                                        tmff->report = report;
+                                        tmff->rumble = field;
+
+                                        set_bit(FF_RUMBLE, input_dev->ffbit);
+                                        break;
+
+                                default:
+                                        warn("ignoring unknown output usage %08x", field->usage[0].hid);
+                                        continue;
+                        }
+                }
+        }
+
+        error = input_ff_create_memless(input_dev, tmff, hid_tmff_play);
+        if (error) {
+                kfree(tmff);
+                return error;
+        }
+
+        info("Force feedback for ThrustMaster rumble pad devices by Zinx Verituse <zinx@epicsol.org>");
+
+        return 0;
+}
+