1 files changed, 312 insertions, 0 deletions

diff --git a/drivers/hid/hid-dr.c b/drivers/hid/hid-dr.c
new file mode 100644
index 000000000000..61eece47204d
--- /dev/null
+++ b/drivers/hid/hid-dr.c
@@ -0,0 +1,312 @@
+/*
+ * Force feedback support for DragonRise Inc. game controllers
+ *
+ * From what I have gathered, these devices are mass produced in China and are
+ * distributed under several vendors. They often share the same design as
+ * the original PlayStation DualShock controller.
+ *
+ * 0079:0006 "DragonRise Inc.   Generic   USB  Joystick  "
+ *  - tested with a Tesun USB-703 game controller.
+ *
+ * Copyright (c) 2009 Richard Walmsley <richwalm@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
+ */
+
+#include <linux/input.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/hid.h>
+
+#include "hid-ids.h"
+
+#ifdef CONFIG_DRAGONRISE_FF
+#include "usbhid/usbhid.h"
+
+struct drff_device {
+        struct hid_report *report;
+};
+
+static int drff_play(struct input_dev *dev, void *data,
+                                 struct ff_effect *effect)
+{
+        struct hid_device *hid = input_get_drvdata(dev);
+        struct drff_device *drff = data;
+        int strong, weak;
+
+        strong = effect->u.rumble.strong_magnitude;
+        weak = effect->u.rumble.weak_magnitude;
+
+        dbg_hid("called with 0x%04x 0x%04x", strong, weak);
+
+        if (strong || weak) {
+                strong = strong * 0xff / 0xffff;
+                weak = weak * 0xff / 0xffff;
+
+                /* While reverse engineering this device, I found that when
+                   this value is set, it causes the strong rumble to function
+                   at a near maximum speed, so we'll bypass it. */
+                if (weak == 0x0a)
+                        weak = 0x0b;
+
+                drff->report->field[0]->value[0] = 0x51;
+                drff->report->field[0]->value[1] = 0x00;
+                drff->report->field[0]->value[2] = weak;
+                drff->report->field[0]->value[4] = strong;
+                usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
+
+                drff->report->field[0]->value[0] = 0xfa;
+                drff->report->field[0]->value[1] = 0xfe;
+        } else {
+                drff->report->field[0]->value[0] = 0xf3;
+                drff->report->field[0]->value[1] = 0x00;
+        }
+
+        drff->report->field[0]->value[2] = 0x00;
+        drff->report->field[0]->value[4] = 0x00;
+        dbg_hid("running with 0x%02x 0x%02x", strong, weak);
+        usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
+
+        return 0;
+}
+
+static int drff_init(struct hid_device *hid)
+{
+        struct drff_device *drff;
+        struct hid_report *report;
+        struct hid_input *hidinput = list_first_entry(&hid->inputs,
+                                                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)) {
+                hid_err(hid, "no output reports found\n");
+                return -ENODEV;
+        }
+
+        report = list_first_entry(report_list, struct hid_report, list);
+        if (report->maxfield < 1) {
+                hid_err(hid, "no fields in the report\n");
+                return -ENODEV;
+        }
+
+        if (report->field[0]->report_count < 7) {
+                hid_err(hid, "not enough values in the field\n");
+                return -ENODEV;
+        }
+
+        drff = kzalloc(sizeof(struct drff_device), GFP_KERNEL);
+        if (!drff)
+                return -ENOMEM;
+
+        set_bit(FF_RUMBLE, dev->ffbit);
+
+        error = input_ff_create_memless(dev, drff, drff_play);
+        if (error) {
+                kfree(drff);
+                return error;
+        }
+
+        drff->report = report;
+        drff->report->field[0]->value[0] = 0xf3;
+        drff->report->field[0]->value[1] = 0x00;
+        drff->report->field[0]->value[2] = 0x00;
+        drff->report->field[0]->value[3] = 0x00;
+        drff->report->field[0]->value[4] = 0x00;
+        drff->report->field[0]->value[5] = 0x00;
+        drff->report->field[0]->value[6] = 0x00;
+        usbhid_submit_report(hid, drff->report, USB_DIR_OUT);
+
+        hid_info(hid, "Force Feedback for DragonRise Inc. "
+                 "game controllers by Richard Walmsley <richwalm@gmail.com>\n");
+
+        return 0;
+}
+#else
+static inline int drff_init(struct hid_device *hid)
+{
+        return 0;
+}
+#endif
+
+/*
+ * The original descriptor of joystick with PID 0x0011, represented by DVTech PC
+ * JS19. It seems both copied from another device and a result of confusion
+ * either about the specification or about the program used to create the
+ * descriptor. In any case, it's a wonder it works on Windows.
+ *
+ *  Usage Page (Desktop),             ; Generic desktop controls (01h)
+ *  Usage (Joystik),                  ; Joystik (04h, application collection)
+ *  Collection (Application),
+ *    Collection (Logical),
+ *      Report Size (8),
+ *      Report Count (5),
+ *      Logical Minimum (0),
+ *      Logical Maximum (255),
+ *      Physical Minimum (0),
+ *      Physical Maximum (255),
+ *      Usage (X),                    ; X (30h, dynamic value)
+ *      Usage (X),                    ; X (30h, dynamic value)
+ *      Usage (X),                    ; X (30h, dynamic value)
+ *      Usage (X),                    ; X (30h, dynamic value)
+ *      Usage (Y),                    ; Y (31h, dynamic value)
+ *      Input (Variable),
+ *      Report Size (4),
+ *      Report Count (1),
+ *      Logical Maximum (7),
+ *      Physical Maximum (315),
+ *      Unit (Degrees),
+ *      Usage (00h),
+ *      Input (Variable, Null State),
+ *      Unit,
+ *      Report Size (1),
+ *      Report Count (10),
+ *      Logical Maximum (1),
+ *      Physical Maximum (1),
+ *      Usage Page (Button),          ; Button (09h)
+ *      Usage Minimum (01h),
+ *      Usage Maximum (0Ah),
+ *      Input (Variable),
+ *      Usage Page (FF00h),           ; FF00h, vendor-defined
+ *      Report Size (1),
+ *      Report Count (10),
+ *      Logical Maximum (1),
+ *      Physical Maximum (1),
+ *      Usage (01h),
+ *      Input (Variable),
+ *    End Collection,
+ *    Collection (Logical),
+ *      Report Size (8),
+ *      Report Count (4),
+ *      Physical Maximum (255),
+ *      Logical Maximum (255),
+ *      Usage (02h),
+ *      Output (Variable),
+ *    End Collection,
+ *  End Collection
+ */
+
+/* Size of the original descriptor of the PID 0x0011 joystick */
+#define PID0011_RDESC_ORIG_SIZE 101
+
+/* Fixed report descriptor for PID 0x011 joystick */
+static __u8 pid0011_rdesc_fixed[] = {
+        0x05, 0x01,         /*  Usage Page (Desktop),           */
+        0x09, 0x04,         /*  Usage (Joystik),                */
+        0xA1, 0x01,         /*  Collection (Application),       */
+        0xA1, 0x02,         /*      Collection (Logical),       */
+        0x14,               /*          Logical Minimum (0),    */
+        0x75, 0x08,         /*          Report Size (8),        */
+        0x95, 0x03,         /*          Report Count (3),       */
+        0x81, 0x01,         /*          Input (Constant),       */
+        0x26, 0xFF, 0x00,   /*          Logical Maximum (255),  */
+        0x95, 0x02,         /*          Report Count (2),       */
+        0x09, 0x30,         /*          Usage (X),              */
+        0x09, 0x31,         /*          Usage (Y),              */
+        0x81, 0x02,         /*          Input (Variable),       */
+        0x75, 0x01,         /*          Report Size (1),        */
+        0x95, 0x04,         /*          Report Count (4),       */
+        0x81, 0x01,         /*          Input (Constant),       */
+        0x25, 0x01,         /*          Logical Maximum (1),    */
+        0x95, 0x0A,         /*          Report Count (10),      */
+        0x05, 0x09,         /*          Usage Page (Button),    */
+        0x19, 0x01,         /*          Usage Minimum (01h),    */
+        0x29, 0x0A,         /*          Usage Maximum (0Ah),    */
+        0x81, 0x02,         /*          Input (Variable),       */
+        0x95, 0x0A,         /*          Report Count (10),      */
+        0x81, 0x01,         /*          Input (Constant),       */
+        0xC0,               /*      End Collection,             */
+        0xC0                /*  End Collection                  */
+};
+
+static __u8 *dr_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+                                unsigned int *rsize)
+{
+        switch (hdev->product) {
+        case 0x0011:
+                if (*rsize == PID0011_RDESC_ORIG_SIZE) {
+                        rdesc = pid0011_rdesc_fixed;
+                        *rsize = sizeof(pid0011_rdesc_fixed);
+                }
+                break;
+        }
+        return rdesc;
+}
+
+static int dr_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+        int ret;
+
+        dev_dbg(&hdev->dev, "DragonRise Inc. HID hardware probe...");
+
+        ret = hid_parse(hdev);
+        if (ret) {
+                hid_err(hdev, "parse failed\n");
+                goto err;
+        }
+
+        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
+        if (ret) {
+                hid_err(hdev, "hw start failed\n");
+                goto err;
+        }
+
+        switch (hdev->product) {
+        case 0x0006:
+                ret = drff_init(hdev);
+                if (ret) {
+                        dev_err(&hdev->dev, "force feedback init failed\n");
+                        hid_hw_stop(hdev);
+                        goto err;
+                }
+                break;
+        }
+
+        return 0;
+err:
+        return ret;
+}
+
+static const struct hid_device_id dr_devices[] = {
+        { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006),  },
+        { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0011),  },
+        { }
+};
+MODULE_DEVICE_TABLE(hid, dr_devices);
+
+static struct hid_driver dr_driver = {
+        .name = "dragonrise",
+        .id_table = dr_devices,
+        .report_fixup = dr_report_fixup,
+        .probe = dr_probe,
+};
+
+static int __init dr_init(void)
+{
+        return hid_register_driver(&dr_driver);
+}
+
+static void __exit dr_exit(void)
+{
+        hid_unregister_driver(&dr_driver);
+}
+
+module_init(dr_init);
+module_exit(dr_exit);
+MODULE_LICENSE("GPL");