Input: add force feedback driver for PSX-style Zeroplus devices

Signed-off-by: Anssi Hannula <anssi.hannula@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 110 insertions, 0 deletions

diff --git a/drivers/usb/input/hid-zpff.c b/drivers/usb/input/hid-zpff.c
new file mode 100644
index 00000000000..d2ce3214572
--- /dev/null
+++ b/drivers/usb/input/hid-zpff.c
@@ -0,0 +1,110 @@
+/*
+ *  Force feedback support for Zeroplus based devices
+ *
+ *  Copyright (c) 2005, 2006 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-zpff: " format "\n" , ## arg)
+
+#include <linux/input.h>
+#include <linux/usb.h>
+#include "hid.h"
+
+struct zpff_device {
+	struct hid_report *report;
+};
+
+static int hid_zpff_play(struct input_dev *dev, void *data,
+			 struct ff_effect *effect)
+{
+	struct hid_device *hid = dev->private;
+	struct zpff_device *zpff = data;
+	int left, right;
+
+	/*
+	 * The following is specified the other way around in the Zeroplus
+	 * datasheet but the order below is correct for the XFX Executioner;
+	 * however it is possible that the XFX Executioner is an exception
+	 */
+
+	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;
+
+	zpff->report->field[2]->value[0] = left;
+	zpff->report->field[3]->value[0] = right;
+	debug("running with 0x%02x 0x%02x", left, right);
+	hid_submit_report(hid, zpff->report, USB_DIR_OUT);
+
+	return 0;
+}
+
+int hid_zpff_init(struct hid_device *hid)
+{
+	struct zpff_device *zpff;
+	struct hid_report *report;
+	struct hid_input *hidinput = list_entry(hid->inputs.next,
+						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)) {
+		printk(KERN_ERR "hid-zpff: no output report found\n");
+		return -ENODEV;
+	}
+
+	report = list_entry(report_list->next, struct hid_report, list);
+
+	if (report->maxfield < 4) {
+		printk(KERN_ERR "hid-zpff: not enough fields in report\n");
+		return -ENODEV;
+	}
+
+	zpff = kzalloc(sizeof(struct zpff_device), GFP_KERNEL);
+	if (!zpff)
+		return -ENOMEM;
+
+	set_bit(FF_RUMBLE, dev->ffbit);
+
+	error = input_ff_create_memless(dev, zpff, hid_zpff_play);
+	if (error) {
+		kfree(zpff);
+		return error;
+	}
+
+	zpff->report = report;
+	zpff->report->field[0]->value[0] = 0x00;
+	zpff->report->field[1]->value[0] = 0x02;
+	zpff->report->field[2]->value[0] = 0x00;
+	zpff->report->field[3]->value[0] = 0x00;
+	hid_submit_report(hid, zpff->report, USB_DIR_OUT);
+
+	printk(KERN_INFO "Force feedback for Zeroplus based devices by "
+	       "Anssi Hannula <anssi.hannula@gmail.com>\n");
+
+	return 0;
+}