HID: force feedback support for SmartJoy PLUS PS2/USB adapter

This driver adds force feedback support for SmartJoy PLUS PS2/USB adapter. I
made this driver one device spesific instead of making generic 'wisegroup-ff'
because I have another Wisegroup PS2/USB adapter that doesn't work same way as
SmartJoy PLUS. If another device that is compatible pops up, this driver could
be then renamed to something more generic.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 180 insertions, 0 deletions

diff --git a/drivers/hid/hid-sjoy.c b/drivers/hid/hid-sjoy.c
new file mode 100644
index 000000000000..eab169e5c371
--- /dev/null
+++ b/drivers/hid/hid-sjoy.c
@@ -0,0 +1,180 @@
+/*
+ *  Force feedback support for SmartJoy PLUS PS2->USB adapter
+ *
+ *  Copyright (c) 2009 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
+ *
+ *  Based of hid-pl.c and hid-gaff.c
+ *   Copyright (c) 2007, 2009 Anssi Hannula <anssi.hannula@gmail.com>
+ *   Copyright (c) 2008 Lukasz Lubojanski <lukasz@lubojanski.info>
+ */
+
+/*
+ * 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 */
+
+#include <linux/input.h>
+#include <linux/usb.h>
+#include <linux/hid.h>
+#include "hid-ids.h"
+
+#ifdef CONFIG_SMARTJOYPLUS_FF
+#include "usbhid/usbhid.h"
+
+struct sjoyff_device {
+        struct hid_report *report;
+};
+
+static int hid_sjoyff_play(struct input_dev *dev, void *data,
+                         struct ff_effect *effect)
+{
+        struct hid_device *hid = input_get_drvdata(dev);
+        struct sjoyff_device *sjoyff = data;
+        u32 left, right;
+
+        left = effect->u.rumble.strong_magnitude;
+        right = effect->u.rumble.weak_magnitude;
+        dev_dbg(&dev->dev, "called with 0x%08x 0x%08x\n", left, right);
+
+        left = left * 0xff / 0xffff;
+        right = (right != 0); /* on/off only */
+
+        sjoyff->report->field[0]->value[1] = right;
+        sjoyff->report->field[0]->value[2] = left;
+        dev_dbg(&dev->dev, "running with 0x%02x 0x%02x\n", left, right);
+        usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
+
+        return 0;
+}
+
+static int sjoyff_init(struct hid_device *hid)
+{
+        struct sjoyff_device *sjoyff;
+        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 list_head *report_ptr = report_list;
+        struct input_dev *dev;
+        int error;
+
+        if (list_empty(report_list)) {
+                dev_err(&hid->dev, "no output reports found\n");
+                return -ENODEV;
+        }
+
+        report_ptr = report_ptr->next;
+
+        if (report_ptr == report_list) {
+                dev_err(&hid->dev, "required output report is "
+                                "missing\n");
+                return -ENODEV;
+        }
+
+        report = list_entry(report_ptr, 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 < 3) {
+                dev_err(&hid->dev, "not enough values in the field\n");
+                return -ENODEV;
+        }
+
+        sjoyff = kzalloc(sizeof(struct sjoyff_device), GFP_KERNEL);
+        if (!sjoyff)
+                return -ENOMEM;
+
+        dev = hidinput->input;
+
+        set_bit(FF_RUMBLE, dev->ffbit);
+
+        error = input_ff_create_memless(dev, sjoyff, hid_sjoyff_play);
+        if (error) {
+                kfree(sjoyff);
+                return error;
+        }
+
+        sjoyff->report = report;
+        sjoyff->report->field[0]->value[0] = 0x01;
+        sjoyff->report->field[0]->value[1] = 0x00;
+        sjoyff->report->field[0]->value[2] = 0x00;
+        usbhid_submit_report(hid, sjoyff->report, USB_DIR_OUT);
+
+        dev_info(&hid->dev,
+                "Force feedback for SmartJoy PLUS PS2/USB adapter\n");
+
+        return 0;
+}
+#else
+static inline int sjoyff_init(struct hid_device *hid)
+{
+        return 0;
+}
+#endif
+
+static int sjoy_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;
+        }
+
+        sjoyff_init(hdev);
+
+        return 0;
+err:
+        return ret;
+}
+
+static const struct hid_device_id sjoy_devices[] = {
+        { HID_USB_DEVICE(USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_SMARTJOY_PLUS) },
+        { }
+};
+MODULE_DEVICE_TABLE(hid, sjoy_devices);
+
+static struct hid_driver sjoy_driver = {
+        .name = "smartjoyplus",
+        .id_table = sjoy_devices,
+        .probe = sjoy_probe,
+};
+
+static int sjoy_init(void)
+{
+        return hid_register_driver(&sjoy_driver);
+}
+
+static void sjoy_exit(void)
+{
+        hid_unregister_driver(&sjoy_driver);
+}
+
+module_init(sjoy_init);
+module_exit(sjoy_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jussi Kivilinna");
+