1 files changed, 129 insertions, 0 deletions

diff --git a/drivers/hid/usbhid/hid-plff.c b/drivers/hid/usbhid/hid-plff.c
new file mode 100644
index 000000000000..76d2e6e14db4
--- /dev/null
+++ b/drivers/hid/usbhid/hid-plff.c
@@ -0,0 +1,129 @@
+/*
+ *  Force feedback support for PantherLord USB/PS2 2in1 Adapter devices
+ *
+ *  Copyright (c) 2007 Anssi Hannula <anssi.hannula@gmail.com>
+ */
+
+/*
+ * 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
+ */
+
+
+/* #define DEBUG */
+
+#define debug(format, arg...) pr_debug("hid-plff: " format "\n" , ## arg)
+
+#include <linux/input.h>
+#include <linux/usb.h>
+#include <linux/hid.h>
+#include "usbhid.h"
+
+struct plff_device {
+        struct hid_report *report;
+};
+
+static int hid_plff_play(struct input_dev *dev, void *data,
+                         struct ff_effect *effect)
+{
+        struct hid_device *hid = dev->private;
+        struct plff_device *plff = data;
+        int left, right;
+
+        left = effect->u.rumble.strong_magnitude;
+        right = effect->u.rumble.weak_magnitude;
+        debug("called with 0x%04x 0x%04x", left, right);
+
+        left = left * 0x7f / 0xffff;
+        right = right * 0x7f / 0xffff;
+
+        plff->report->field[0]->value[2] = left;
+        plff->report->field[0]->value[3] = right;
+        debug("running with 0x%02x 0x%02x", left, right);
+        usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
+
+        return 0;
+}
+
+int hid_plff_init(struct hid_device *hid)
+{
+        struct plff_device *plff;
+        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;
+
+        /* The device contains 2 output reports (one for each
+           HID_QUIRK_MULTI_INPUT device), both containing 1 field, which
+           contains 4 ff00.0002 usages and 4 16bit absolute values.
+
+           The 2 input reports also contain a field which contains
+           8 ff00.0001 usages and 8 boolean values. Their meaning is
+           currently unknown. */
+
+        if (list_empty(report_list)) {
+                printk(KERN_ERR "hid-plff: no output reports found\n");
+                return -ENODEV;
+        }
+
+        list_for_each_entry(hidinput, &hid->inputs, list) {
+
+                report_ptr = report_ptr->next;
+
+                if (report_ptr == report_list) {
+                        printk(KERN_ERR "hid-plff: required output report is missing\n");
+                        return -ENODEV;
+                }
+
+                report = list_entry(report_ptr, struct hid_report, list);
+                if (report->maxfield < 1) {
+                        printk(KERN_ERR "hid-plff: no fields in the report\n");
+                        return -ENODEV;
+                }
+
+                if (report->field[0]->report_count < 4) {
+                        printk(KERN_ERR "hid-plff: not enough values in the field\n");
+                        return -ENODEV;
+                }
+
+                plff = kzalloc(sizeof(struct plff_device), GFP_KERNEL);
+                if (!plff)
+                        return -ENOMEM;
+
+                dev = hidinput->input;
+
+                set_bit(FF_RUMBLE, dev->ffbit);
+
+                error = input_ff_create_memless(dev, plff, hid_plff_play);
+                if (error) {
+                        kfree(plff);
+                        return error;
+                }
+
+                plff->report = report;
+                plff->report->field[0]->value[0] = 0x00;
+                plff->report->field[0]->value[1] = 0x00;
+                plff->report->field[0]->value[2] = 0x00;
+                plff->report->field[0]->value[3] = 0x00;
+                usbhid_submit_report(hid, plff->report, USB_DIR_OUT);
+        }
+
+        printk(KERN_INFO "hid-plff: Force feedback for PantherLord USB/PS2 "
+               "2in1 Adapters by Anssi Hannula <anssi.hannula@gmail.com>\n");
+
+        return 0;
+}