HID: move pantherlord FF processing

Move the force feedback processing into a separate module.

[jkosina@suse.cz: fix Kconfig texts a little bit]

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

1 files changed, 205 insertions, 0 deletions

diff --git a/drivers/hid/hid-pl.c b/drivers/hid/hid-pl.c
new file mode 100644
index 00000000000..a1d1fb9da12
--- /dev/null
+++ b/drivers/hid/hid-pl.c
@@ -0,0 +1,205 @@
+/*
+ *  Force feedback support for PantherLord/GreenAsia based devices
+ *
+ *  The devices are distributed under various names and the same USB device ID
+ *  can be used in both adapters and actual game controllers.
+ *
+ *  0810:0001 "Twin USB Joystick"
+ *   - tested with PantherLord USB/PS2 2in1 Adapter
+ *   - contains two reports, one for each port (HID_QUIRK_MULTI_INPUT)
+ *
+ *  0e8f:0003 "GreenAsia Inc.    USB Joystick     "
+ *   - tested with K??ng Gaming gamepad
+ *
+ *  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 "hid-ids.h"
+
+#ifdef CONFIG_PANTHERLORD_FF
+#include "usbhid/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 = input_get_drvdata(dev);
+        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;
+}
+
+static int 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 one output report per physical device, all
+           containing 1 field, which contains 4 ff00.0002 usages and 4 16bit
+           absolute values.
+
+           The 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/GreenAsia "
+               "devices by Anssi Hannula <anssi.hannula@gmail.com>\n");
+
+        return 0;
+}
+#else
+static inline int plff_init(struct hid_device *hid)
+{
+        return 0;
+}
+#endif
+
+static int pl_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+        int ret;
+
+        if (id->driver_data)
+                hdev->quirks |= HID_QUIRK_MULTI_INPUT;
+
+        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;
+        }
+
+        plff_init(hdev);
+
+        return 0;
+err:
+        return ret;
+}
+
+static const struct hid_device_id pl_devices[] = {
+        { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR),
+                .driver_data = 1 }, /* Twin USB Joystick */
+        { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003), }, /* GreenAsia Inc. USB Joystick */
+        { }
+};
+MODULE_DEVICE_TABLE(hid, pl_devices);
+
+static struct hid_driver pl_driver = {
+        .name = "pantherlord",
+        .id_table = pl_devices,
+        .probe = pl_probe,
+};
+
+static int pl_init(void)
+{
+        return hid_register_driver(&pl_driver);
+}
+
+static void pl_exit(void)
+{
+        hid_unregister_driver(&pl_driver);
+}
+
+module_init(pl_init);
+module_exit(pl_exit);
+MODULE_LICENSE("GPL");
+
+HID_COMPAT_LOAD_DRIVER(pantherlord);