HID: move logitech FF processing

Merge the logitech force feedback processing directly into logitech
driver from the usbhid core.

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

1 files changed, 153 insertions, 0 deletions

diff --git a/drivers/hid/hid-lgff.c b/drivers/hid/hid-lgff.c
new file mode 100644
index 000000000000..e379c167ac9e
--- /dev/null
+++ b/drivers/hid/hid-lgff.c
@@ -0,0 +1,153 @@
+/*
+ * Force feedback support for hid-compliant for some of the devices from
+ * Logitech, namely:
+ * - WingMan Cordless RumblePad
+ * - WingMan Force 3D
+ *
+ *  Copyright (c) 2002-2004 Johann Deneux
+ *  Copyright (c) 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
+ *
+ * Should you need to contact me, the author, you can do so by
+ * e-mail - mail your message to <johann.deneux@it.uu.se>
+ */
+
+#include <linux/input.h>
+#include <linux/usb.h>
+#include <linux/hid.h>
+
+#include "usbhid/usbhid.h"
+#include "hid-lg.h"
+
+struct dev_type {
+        u16 idVendor;
+        u16 idProduct;
+        const signed short *ff;
+};
+
+static const signed short ff_rumble[] = {
+        FF_RUMBLE,
+        -1
+};
+
+static const signed short ff_joystick[] = {
+        FF_CONSTANT,
+        -1
+};
+
+static const struct dev_type devices[] = {
+        { 0x046d, 0xc211, ff_rumble },
+        { 0x046d, 0xc219, ff_rumble },
+        { 0x046d, 0xc283, ff_joystick },
+        { 0x046d, 0xc286, ff_joystick },
+        { 0x046d, 0xc294, ff_joystick },
+        { 0x046d, 0xc295, ff_joystick },
+        { 0x046d, 0xca03, ff_joystick },
+};
+
+static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
+{
+        struct hid_device *hid = input_get_drvdata(dev);
+        struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
+        struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
+        int x, y;
+        unsigned int left, right;
+
+#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
+
+        switch (effect->type) {
+        case FF_CONSTANT:
+                x = effect->u.ramp.start_level + 0x7f;  /* 0x7f is center */
+                y = effect->u.ramp.end_level + 0x7f;
+                CLAMP(x);
+                CLAMP(y);
+                report->field[0]->value[0] = 0x51;
+                report->field[0]->value[1] = 0x08;
+                report->field[0]->value[2] = x;
+                report->field[0]->value[3] = y;
+                dbg_hid("(x, y)=(%04x, %04x)\n", x, y);
+                usbhid_submit_report(hid, report, USB_DIR_OUT);
+                break;
+
+        case FF_RUMBLE:
+                right = effect->u.rumble.strong_magnitude;
+                left = effect->u.rumble.weak_magnitude;
+                right = right * 0xff / 0xffff;
+                left = left * 0xff / 0xffff;
+                CLAMP(left);
+                CLAMP(right);
+                report->field[0]->value[0] = 0x42;
+                report->field[0]->value[1] = 0x00;
+                report->field[0]->value[2] = left;
+                report->field[0]->value[3] = right;
+                dbg_hid("(left, right)=(%04x, %04x)\n", left, right);
+                usbhid_submit_report(hid, report, USB_DIR_OUT);
+                break;
+        }
+        return 0;
+}
+
+int lgff_init(struct hid_device* hid)
+{
+        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;
+        struct hid_report *report;
+        struct hid_field *field;
+        const signed short *ff_bits = ff_joystick;
+        int error;
+        int i;
+
+        /* Find the report to use */
+        if (list_empty(report_list)) {
+                err_hid("No output report found");
+                return -1;
+        }
+
+        /* Check that the report looks ok */
+        report = list_entry(report_list->next, struct hid_report, list);
+        if (!report) {
+                err_hid("NULL output report");
+                return -1;
+        }
+
+        field = report->field[0];
+        if (!field) {
+                err_hid("NULL field");
+                return -1;
+        }
+
+        for (i = 0; i < ARRAY_SIZE(devices); i++) {
+                if (dev->id.vendor == devices[i].idVendor &&
+                    dev->id.product == devices[i].idProduct) {
+                        ff_bits = devices[i].ff;
+                        break;
+                }
+        }
+
+        for (i = 0; ff_bits[i] >= 0; i++)
+                set_bit(ff_bits[i], dev->ffbit);
+
+        error = input_ff_create_memless(dev, NULL, hid_lgff_play);
+        if (error)
+                return error;
+
+        printk(KERN_INFO "Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n");
+
+        return 0;
+}