Root/drivers/hid/hid-wiimote-core.c

1/*
2 * HID driver for Nintendo Wiimote devices
3 * Copyright (c) 2011 David Herrmann
4 */
5
6/*
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 */
12
13#include <linux/completion.h>
14#include <linux/device.h>
15#include <linux/hid.h>
16#include <linux/input.h>
17#include <linux/leds.h>
18#include <linux/module.h>
19#include <linux/mutex.h>
20#include <linux/power_supply.h>
21#include <linux/spinlock.h>
22#include "hid-ids.h"
23#include "hid-wiimote.h"
24
25enum wiiproto_keys {
26    WIIPROTO_KEY_LEFT,
27    WIIPROTO_KEY_RIGHT,
28    WIIPROTO_KEY_UP,
29    WIIPROTO_KEY_DOWN,
30    WIIPROTO_KEY_PLUS,
31    WIIPROTO_KEY_MINUS,
32    WIIPROTO_KEY_ONE,
33    WIIPROTO_KEY_TWO,
34    WIIPROTO_KEY_A,
35    WIIPROTO_KEY_B,
36    WIIPROTO_KEY_HOME,
37    WIIPROTO_KEY_COUNT
38};
39
40static __u16 wiiproto_keymap[] = {
41    KEY_LEFT, /* WIIPROTO_KEY_LEFT */
42    KEY_RIGHT, /* WIIPROTO_KEY_RIGHT */
43    KEY_UP, /* WIIPROTO_KEY_UP */
44    KEY_DOWN, /* WIIPROTO_KEY_DOWN */
45    KEY_NEXT, /* WIIPROTO_KEY_PLUS */
46    KEY_PREVIOUS, /* WIIPROTO_KEY_MINUS */
47    BTN_1, /* WIIPROTO_KEY_ONE */
48    BTN_2, /* WIIPROTO_KEY_TWO */
49    BTN_A, /* WIIPROTO_KEY_A */
50    BTN_B, /* WIIPROTO_KEY_B */
51    BTN_MODE, /* WIIPROTO_KEY_HOME */
52};
53
54static enum power_supply_property wiimote_battery_props[] = {
55    POWER_SUPPLY_PROP_CAPACITY,
56    POWER_SUPPLY_PROP_SCOPE,
57};
58
59static ssize_t wiimote_hid_send(struct hid_device *hdev, __u8 *buffer,
60                                size_t count)
61{
62    __u8 *buf;
63    ssize_t ret;
64
65    if (!hdev->hid_output_raw_report)
66        return -ENODEV;
67
68    buf = kmemdup(buffer, count, GFP_KERNEL);
69    if (!buf)
70        return -ENOMEM;
71
72    ret = hdev->hid_output_raw_report(hdev, buf, count, HID_OUTPUT_REPORT);
73
74    kfree(buf);
75    return ret;
76}
77
78static void wiimote_worker(struct work_struct *work)
79{
80    struct wiimote_data *wdata = container_of(work, struct wiimote_data,
81                                    worker);
82    unsigned long flags;
83
84    spin_lock_irqsave(&wdata->qlock, flags);
85
86    while (wdata->head != wdata->tail) {
87        spin_unlock_irqrestore(&wdata->qlock, flags);
88        wiimote_hid_send(wdata->hdev, wdata->outq[wdata->tail].data,
89                        wdata->outq[wdata->tail].size);
90        spin_lock_irqsave(&wdata->qlock, flags);
91
92        wdata->tail = (wdata->tail + 1) % WIIMOTE_BUFSIZE;
93    }
94
95    spin_unlock_irqrestore(&wdata->qlock, flags);
96}
97
98static void wiimote_queue(struct wiimote_data *wdata, const __u8 *buffer,
99                                size_t count)
100{
101    unsigned long flags;
102    __u8 newhead;
103
104    if (count > HID_MAX_BUFFER_SIZE) {
105        hid_warn(wdata->hdev, "Sending too large output report\n");
106        return;
107    }
108
109    /*
110     * Copy new request into our output queue and check whether the
111     * queue is full. If it is full, discard this request.
112     * If it is empty we need to start a new worker that will
113     * send out the buffer to the hid device.
114     * If the queue is not empty, then there must be a worker
115     * that is currently sending out our buffer and this worker
116     * will reschedule itself until the queue is empty.
117     */
118
119    spin_lock_irqsave(&wdata->qlock, flags);
120
121    memcpy(wdata->outq[wdata->head].data, buffer, count);
122    wdata->outq[wdata->head].size = count;
123    newhead = (wdata->head + 1) % WIIMOTE_BUFSIZE;
124
125    if (wdata->head == wdata->tail) {
126        wdata->head = newhead;
127        schedule_work(&wdata->worker);
128    } else if (newhead != wdata->tail) {
129        wdata->head = newhead;
130    } else {
131        hid_warn(wdata->hdev, "Output queue is full");
132    }
133
134    spin_unlock_irqrestore(&wdata->qlock, flags);
135}
136
137/*
138 * This sets the rumble bit on the given output report if rumble is
139 * currently enabled.
140 * \cmd1 must point to the second byte in the output report => &cmd[1]
141 * This must be called on nearly every output report before passing it
142 * into the output queue!
143 */
144static inline void wiiproto_keep_rumble(struct wiimote_data *wdata, __u8 *cmd1)
145{
146    if (wdata->state.flags & WIIPROTO_FLAG_RUMBLE)
147        *cmd1 |= 0x01;
148}
149
150static void wiiproto_req_rumble(struct wiimote_data *wdata, __u8 rumble)
151{
152    __u8 cmd[2];
153
154    rumble = !!rumble;
155    if (rumble == !!(wdata->state.flags & WIIPROTO_FLAG_RUMBLE))
156        return;
157
158    if (rumble)
159        wdata->state.flags |= WIIPROTO_FLAG_RUMBLE;
160    else
161        wdata->state.flags &= ~WIIPROTO_FLAG_RUMBLE;
162
163    cmd[0] = WIIPROTO_REQ_RUMBLE;
164    cmd[1] = 0;
165
166    wiiproto_keep_rumble(wdata, &cmd[1]);
167    wiimote_queue(wdata, cmd, sizeof(cmd));
168}
169
170static void wiiproto_req_leds(struct wiimote_data *wdata, int leds)
171{
172    __u8 cmd[2];
173
174    leds &= WIIPROTO_FLAGS_LEDS;
175    if ((wdata->state.flags & WIIPROTO_FLAGS_LEDS) == leds)
176        return;
177    wdata->state.flags = (wdata->state.flags & ~WIIPROTO_FLAGS_LEDS) | leds;
178
179    cmd[0] = WIIPROTO_REQ_LED;
180    cmd[1] = 0;
181
182    if (leds & WIIPROTO_FLAG_LED1)
183        cmd[1] |= 0x10;
184    if (leds & WIIPROTO_FLAG_LED2)
185        cmd[1] |= 0x20;
186    if (leds & WIIPROTO_FLAG_LED3)
187        cmd[1] |= 0x40;
188    if (leds & WIIPROTO_FLAG_LED4)
189        cmd[1] |= 0x80;
190
191    wiiproto_keep_rumble(wdata, &cmd[1]);
192    wiimote_queue(wdata, cmd, sizeof(cmd));
193}
194
195/*
196 * Check what peripherals of the wiimote are currently
197 * active and select a proper DRM that supports all of
198 * the requested data inputs.
199 */
200static __u8 select_drm(struct wiimote_data *wdata)
201{
202    __u8 ir = wdata->state.flags & WIIPROTO_FLAGS_IR;
203    bool ext = wiiext_active(wdata);
204
205    if (ir == WIIPROTO_FLAG_IR_BASIC) {
206        if (wdata->state.flags & WIIPROTO_FLAG_ACCEL)
207            return WIIPROTO_REQ_DRM_KAIE;
208        else
209            return WIIPROTO_REQ_DRM_KIE;
210    } else if (ir == WIIPROTO_FLAG_IR_EXT) {
211        return WIIPROTO_REQ_DRM_KAI;
212    } else if (ir == WIIPROTO_FLAG_IR_FULL) {
213        return WIIPROTO_REQ_DRM_SKAI1;
214    } else {
215        if (wdata->state.flags & WIIPROTO_FLAG_ACCEL) {
216            if (ext)
217                return WIIPROTO_REQ_DRM_KAE;
218            else
219                return WIIPROTO_REQ_DRM_KA;
220        } else {
221            if (ext)
222                return WIIPROTO_REQ_DRM_KE;
223            else
224                return WIIPROTO_REQ_DRM_K;
225        }
226    }
227}
228
229void wiiproto_req_drm(struct wiimote_data *wdata, __u8 drm)
230{
231    __u8 cmd[3];
232
233    if (drm == WIIPROTO_REQ_NULL)
234        drm = select_drm(wdata);
235
236    cmd[0] = WIIPROTO_REQ_DRM;
237    cmd[1] = 0;
238    cmd[2] = drm;
239
240    wdata->state.drm = drm;
241    wiiproto_keep_rumble(wdata, &cmd[1]);
242    wiimote_queue(wdata, cmd, sizeof(cmd));
243}
244
245static void wiiproto_req_status(struct wiimote_data *wdata)
246{
247    __u8 cmd[2];
248
249    cmd[0] = WIIPROTO_REQ_SREQ;
250    cmd[1] = 0;
251
252    wiiproto_keep_rumble(wdata, &cmd[1]);
253    wiimote_queue(wdata, cmd, sizeof(cmd));
254}
255
256static void wiiproto_req_accel(struct wiimote_data *wdata, __u8 accel)
257{
258    accel = !!accel;
259    if (accel == !!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
260        return;
261
262    if (accel)
263        wdata->state.flags |= WIIPROTO_FLAG_ACCEL;
264    else
265        wdata->state.flags &= ~WIIPROTO_FLAG_ACCEL;
266
267    wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
268}
269
270static void wiiproto_req_ir1(struct wiimote_data *wdata, __u8 flags)
271{
272    __u8 cmd[2];
273
274    cmd[0] = WIIPROTO_REQ_IR1;
275    cmd[1] = flags;
276
277    wiiproto_keep_rumble(wdata, &cmd[1]);
278    wiimote_queue(wdata, cmd, sizeof(cmd));
279}
280
281static void wiiproto_req_ir2(struct wiimote_data *wdata, __u8 flags)
282{
283    __u8 cmd[2];
284
285    cmd[0] = WIIPROTO_REQ_IR2;
286    cmd[1] = flags;
287
288    wiiproto_keep_rumble(wdata, &cmd[1]);
289    wiimote_queue(wdata, cmd, sizeof(cmd));
290}
291
292#define wiiproto_req_wreg(wdata, os, buf, sz) \
293            wiiproto_req_wmem((wdata), false, (os), (buf), (sz))
294
295#define wiiproto_req_weeprom(wdata, os, buf, sz) \
296            wiiproto_req_wmem((wdata), true, (os), (buf), (sz))
297
298static void wiiproto_req_wmem(struct wiimote_data *wdata, bool eeprom,
299                __u32 offset, const __u8 *buf, __u8 size)
300{
301    __u8 cmd[22];
302
303    if (size > 16 || size == 0) {
304        hid_warn(wdata->hdev, "Invalid length %d wmem request\n", size);
305        return;
306    }
307
308    memset(cmd, 0, sizeof(cmd));
309    cmd[0] = WIIPROTO_REQ_WMEM;
310    cmd[2] = (offset >> 16) & 0xff;
311    cmd[3] = (offset >> 8) & 0xff;
312    cmd[4] = offset & 0xff;
313    cmd[5] = size;
314    memcpy(&cmd[6], buf, size);
315
316    if (!eeprom)
317        cmd[1] |= 0x04;
318
319    wiiproto_keep_rumble(wdata, &cmd[1]);
320    wiimote_queue(wdata, cmd, sizeof(cmd));
321}
322
323void wiiproto_req_rmem(struct wiimote_data *wdata, bool eeprom, __u32 offset,
324                                __u16 size)
325{
326    __u8 cmd[7];
327
328    if (size == 0) {
329        hid_warn(wdata->hdev, "Invalid length %d rmem request\n", size);
330        return;
331    }
332
333    cmd[0] = WIIPROTO_REQ_RMEM;
334    cmd[1] = 0;
335    cmd[2] = (offset >> 16) & 0xff;
336    cmd[3] = (offset >> 8) & 0xff;
337    cmd[4] = offset & 0xff;
338    cmd[5] = (size >> 8) & 0xff;
339    cmd[6] = size & 0xff;
340
341    if (!eeprom)
342        cmd[1] |= 0x04;
343
344    wiiproto_keep_rumble(wdata, &cmd[1]);
345    wiimote_queue(wdata, cmd, sizeof(cmd));
346}
347
348/* requries the cmd-mutex to be held */
349int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset,
350                        const __u8 *wmem, __u8 size)
351{
352    unsigned long flags;
353    int ret;
354
355    spin_lock_irqsave(&wdata->state.lock, flags);
356    wiimote_cmd_set(wdata, WIIPROTO_REQ_WMEM, 0);
357    wiiproto_req_wreg(wdata, offset, wmem, size);
358    spin_unlock_irqrestore(&wdata->state.lock, flags);
359
360    ret = wiimote_cmd_wait(wdata);
361    if (!ret && wdata->state.cmd_err)
362        ret = -EIO;
363
364    return ret;
365}
366
367/* requries the cmd-mutex to be held */
368ssize_t wiimote_cmd_read(struct wiimote_data *wdata, __u32 offset, __u8 *rmem,
369                                __u8 size)
370{
371    unsigned long flags;
372    ssize_t ret;
373
374    spin_lock_irqsave(&wdata->state.lock, flags);
375    wdata->state.cmd_read_size = size;
376    wdata->state.cmd_read_buf = rmem;
377    wiimote_cmd_set(wdata, WIIPROTO_REQ_RMEM, offset & 0xffff);
378    wiiproto_req_rreg(wdata, offset, size);
379    spin_unlock_irqrestore(&wdata->state.lock, flags);
380
381    ret = wiimote_cmd_wait(wdata);
382
383    spin_lock_irqsave(&wdata->state.lock, flags);
384    wdata->state.cmd_read_buf = NULL;
385    spin_unlock_irqrestore(&wdata->state.lock, flags);
386
387    if (!ret) {
388        if (wdata->state.cmd_read_size == 0)
389            ret = -EIO;
390        else
391            ret = wdata->state.cmd_read_size;
392    }
393
394    return ret;
395}
396
397static int wiimote_battery_get_property(struct power_supply *psy,
398                        enum power_supply_property psp,
399                        union power_supply_propval *val)
400{
401    struct wiimote_data *wdata = container_of(psy,
402                        struct wiimote_data, battery);
403    int ret = 0, state;
404    unsigned long flags;
405
406    if (psp == POWER_SUPPLY_PROP_SCOPE) {
407        val->intval = POWER_SUPPLY_SCOPE_DEVICE;
408        return 0;
409    }
410
411    ret = wiimote_cmd_acquire(wdata);
412    if (ret)
413        return ret;
414
415    spin_lock_irqsave(&wdata->state.lock, flags);
416    wiimote_cmd_set(wdata, WIIPROTO_REQ_SREQ, 0);
417    wiiproto_req_status(wdata);
418    spin_unlock_irqrestore(&wdata->state.lock, flags);
419
420    ret = wiimote_cmd_wait(wdata);
421    state = wdata->state.cmd_battery;
422    wiimote_cmd_release(wdata);
423
424    if (ret)
425        return ret;
426
427    switch (psp) {
428        case POWER_SUPPLY_PROP_CAPACITY:
429            val->intval = state * 100 / 255;
430            break;
431        default:
432            ret = -EINVAL;
433            break;
434    }
435
436    return ret;
437}
438
439static int wiimote_init_ir(struct wiimote_data *wdata, __u16 mode)
440{
441    int ret;
442    unsigned long flags;
443    __u8 format = 0;
444    static const __u8 data_enable[] = { 0x01 };
445    static const __u8 data_sens1[] = { 0x02, 0x00, 0x00, 0x71, 0x01,
446                        0x00, 0xaa, 0x00, 0x64 };
447    static const __u8 data_sens2[] = { 0x63, 0x03 };
448    static const __u8 data_fin[] = { 0x08 };
449
450    spin_lock_irqsave(&wdata->state.lock, flags);
451
452    if (mode == (wdata->state.flags & WIIPROTO_FLAGS_IR)) {
453        spin_unlock_irqrestore(&wdata->state.lock, flags);
454        return 0;
455    }
456
457    if (mode == 0) {
458        wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
459        wiiproto_req_ir1(wdata, 0);
460        wiiproto_req_ir2(wdata, 0);
461        wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
462        spin_unlock_irqrestore(&wdata->state.lock, flags);
463        return 0;
464    }
465
466    spin_unlock_irqrestore(&wdata->state.lock, flags);
467
468    ret = wiimote_cmd_acquire(wdata);
469    if (ret)
470        return ret;
471
472    /* send PIXEL CLOCK ENABLE cmd first */
473    spin_lock_irqsave(&wdata->state.lock, flags);
474    wiimote_cmd_set(wdata, WIIPROTO_REQ_IR1, 0);
475    wiiproto_req_ir1(wdata, 0x06);
476    spin_unlock_irqrestore(&wdata->state.lock, flags);
477
478    ret = wiimote_cmd_wait(wdata);
479    if (ret)
480        goto unlock;
481    if (wdata->state.cmd_err) {
482        ret = -EIO;
483        goto unlock;
484    }
485
486    /* enable IR LOGIC */
487    spin_lock_irqsave(&wdata->state.lock, flags);
488    wiimote_cmd_set(wdata, WIIPROTO_REQ_IR2, 0);
489    wiiproto_req_ir2(wdata, 0x06);
490    spin_unlock_irqrestore(&wdata->state.lock, flags);
491
492    ret = wiimote_cmd_wait(wdata);
493    if (ret)
494        goto unlock;
495    if (wdata->state.cmd_err) {
496        ret = -EIO;
497        goto unlock;
498    }
499
500    /* enable IR cam but do not make it send data, yet */
501    ret = wiimote_cmd_write(wdata, 0xb00030, data_enable,
502                            sizeof(data_enable));
503    if (ret)
504        goto unlock;
505
506    /* write first sensitivity block */
507    ret = wiimote_cmd_write(wdata, 0xb00000, data_sens1,
508                            sizeof(data_sens1));
509    if (ret)
510        goto unlock;
511
512    /* write second sensitivity block */
513    ret = wiimote_cmd_write(wdata, 0xb0001a, data_sens2,
514                            sizeof(data_sens2));
515    if (ret)
516        goto unlock;
517
518    /* put IR cam into desired state */
519    switch (mode) {
520        case WIIPROTO_FLAG_IR_FULL:
521            format = 5;
522            break;
523        case WIIPROTO_FLAG_IR_EXT:
524            format = 3;
525            break;
526        case WIIPROTO_FLAG_IR_BASIC:
527            format = 1;
528            break;
529    }
530    ret = wiimote_cmd_write(wdata, 0xb00033, &format, sizeof(format));
531    if (ret)
532        goto unlock;
533
534    /* make IR cam send data */
535    ret = wiimote_cmd_write(wdata, 0xb00030, data_fin, sizeof(data_fin));
536    if (ret)
537        goto unlock;
538
539    /* request new DRM mode compatible to IR mode */
540    spin_lock_irqsave(&wdata->state.lock, flags);
541    wdata->state.flags &= ~WIIPROTO_FLAGS_IR;
542    wdata->state.flags |= mode & WIIPROTO_FLAGS_IR;
543    wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
544    spin_unlock_irqrestore(&wdata->state.lock, flags);
545
546unlock:
547    wiimote_cmd_release(wdata);
548    return ret;
549}
550
551static enum led_brightness wiimote_leds_get(struct led_classdev *led_dev)
552{
553    struct wiimote_data *wdata;
554    struct device *dev = led_dev->dev->parent;
555    int i;
556    unsigned long flags;
557    bool value = false;
558
559    wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
560
561    for (i = 0; i < 4; ++i) {
562        if (wdata->leds[i] == led_dev) {
563            spin_lock_irqsave(&wdata->state.lock, flags);
564            value = wdata->state.flags & WIIPROTO_FLAG_LED(i + 1);
565            spin_unlock_irqrestore(&wdata->state.lock, flags);
566            break;
567        }
568    }
569
570    return value ? LED_FULL : LED_OFF;
571}
572
573static void wiimote_leds_set(struct led_classdev *led_dev,
574                        enum led_brightness value)
575{
576    struct wiimote_data *wdata;
577    struct device *dev = led_dev->dev->parent;
578    int i;
579    unsigned long flags;
580    __u8 state, flag;
581
582    wdata = hid_get_drvdata(container_of(dev, struct hid_device, dev));
583
584    for (i = 0; i < 4; ++i) {
585        if (wdata->leds[i] == led_dev) {
586            flag = WIIPROTO_FLAG_LED(i + 1);
587            spin_lock_irqsave(&wdata->state.lock, flags);
588            state = wdata->state.flags;
589            if (value == LED_OFF)
590                wiiproto_req_leds(wdata, state & ~flag);
591            else
592                wiiproto_req_leds(wdata, state | flag);
593            spin_unlock_irqrestore(&wdata->state.lock, flags);
594            break;
595        }
596    }
597}
598
599static int wiimote_ff_play(struct input_dev *dev, void *data,
600                            struct ff_effect *eff)
601{
602    struct wiimote_data *wdata = input_get_drvdata(dev);
603    __u8 value;
604    unsigned long flags;
605
606    /*
607     * The wiimote supports only a single rumble motor so if any magnitude
608     * is set to non-zero then we start the rumble motor. If both are set to
609     * zero, we stop the rumble motor.
610     */
611
612    if (eff->u.rumble.strong_magnitude || eff->u.rumble.weak_magnitude)
613        value = 1;
614    else
615        value = 0;
616
617    spin_lock_irqsave(&wdata->state.lock, flags);
618    wiiproto_req_rumble(wdata, value);
619    spin_unlock_irqrestore(&wdata->state.lock, flags);
620
621    return 0;
622}
623
624static int wiimote_input_open(struct input_dev *dev)
625{
626    struct wiimote_data *wdata = input_get_drvdata(dev);
627
628    return hid_hw_open(wdata->hdev);
629}
630
631static void wiimote_input_close(struct input_dev *dev)
632{
633    struct wiimote_data *wdata = input_get_drvdata(dev);
634
635    hid_hw_close(wdata->hdev);
636}
637
638static int wiimote_accel_open(struct input_dev *dev)
639{
640    struct wiimote_data *wdata = input_get_drvdata(dev);
641    int ret;
642    unsigned long flags;
643
644    ret = hid_hw_open(wdata->hdev);
645    if (ret)
646        return ret;
647
648    spin_lock_irqsave(&wdata->state.lock, flags);
649    wiiproto_req_accel(wdata, true);
650    spin_unlock_irqrestore(&wdata->state.lock, flags);
651
652    return 0;
653}
654
655static void wiimote_accel_close(struct input_dev *dev)
656{
657    struct wiimote_data *wdata = input_get_drvdata(dev);
658    unsigned long flags;
659
660    spin_lock_irqsave(&wdata->state.lock, flags);
661    wiiproto_req_accel(wdata, false);
662    spin_unlock_irqrestore(&wdata->state.lock, flags);
663
664    hid_hw_close(wdata->hdev);
665}
666
667static int wiimote_ir_open(struct input_dev *dev)
668{
669    struct wiimote_data *wdata = input_get_drvdata(dev);
670    int ret;
671
672    ret = hid_hw_open(wdata->hdev);
673    if (ret)
674        return ret;
675
676    ret = wiimote_init_ir(wdata, WIIPROTO_FLAG_IR_BASIC);
677    if (ret) {
678        hid_hw_close(wdata->hdev);
679        return ret;
680    }
681
682    return 0;
683}
684
685static void wiimote_ir_close(struct input_dev *dev)
686{
687    struct wiimote_data *wdata = input_get_drvdata(dev);
688
689    wiimote_init_ir(wdata, 0);
690    hid_hw_close(wdata->hdev);
691}
692
693static void handler_keys(struct wiimote_data *wdata, const __u8 *payload)
694{
695    input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_LEFT],
696                            !!(payload[0] & 0x01));
697    input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_RIGHT],
698                            !!(payload[0] & 0x02));
699    input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_DOWN],
700                            !!(payload[0] & 0x04));
701    input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_UP],
702                            !!(payload[0] & 0x08));
703    input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_PLUS],
704                            !!(payload[0] & 0x10));
705    input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_TWO],
706                            !!(payload[1] & 0x01));
707    input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_ONE],
708                            !!(payload[1] & 0x02));
709    input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_B],
710                            !!(payload[1] & 0x04));
711    input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_A],
712                            !!(payload[1] & 0x08));
713    input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_MINUS],
714                            !!(payload[1] & 0x10));
715    input_report_key(wdata->input, wiiproto_keymap[WIIPROTO_KEY_HOME],
716                            !!(payload[1] & 0x80));
717    input_sync(wdata->input);
718}
719
720static void handler_accel(struct wiimote_data *wdata, const __u8 *payload)
721{
722    __u16 x, y, z;
723
724    if (!(wdata->state.flags & WIIPROTO_FLAG_ACCEL))
725        return;
726
727    /*
728     * payload is: BB BB XX YY ZZ
729     * Accelerometer data is encoded into 3 10bit values. XX, YY and ZZ
730     * contain the upper 8 bits of each value. The lower 2 bits are
731     * contained in the buttons data BB BB.
732     * Bits 6 and 7 of the first buttons byte BB is the lower 2 bits of the
733     * X accel value. Bit 5 of the second buttons byte is the 2nd bit of Y
734     * accel value and bit 6 is the second bit of the Z value.
735     * The first bit of Y and Z values is not available and always set to 0.
736     * 0x200 is returned on no movement.
737     */
738
739    x = payload[2] << 2;
740    y = payload[3] << 2;
741    z = payload[4] << 2;
742
743    x |= (payload[0] >> 5) & 0x3;
744    y |= (payload[1] >> 4) & 0x2;
745    z |= (payload[1] >> 5) & 0x2;
746
747    input_report_abs(wdata->accel, ABS_RX, x - 0x200);
748    input_report_abs(wdata->accel, ABS_RY, y - 0x200);
749    input_report_abs(wdata->accel, ABS_RZ, z - 0x200);
750    input_sync(wdata->accel);
751}
752
753#define ir_to_input0(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
754                            ABS_HAT0X, ABS_HAT0Y)
755#define ir_to_input1(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
756                            ABS_HAT1X, ABS_HAT1Y)
757#define ir_to_input2(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
758                            ABS_HAT2X, ABS_HAT2Y)
759#define ir_to_input3(wdata, ir, packed) __ir_to_input((wdata), (ir), (packed), \
760                            ABS_HAT3X, ABS_HAT3Y)
761
762static void __ir_to_input(struct wiimote_data *wdata, const __u8 *ir,
763                        bool packed, __u8 xid, __u8 yid)
764{
765    __u16 x, y;
766
767    if (!(wdata->state.flags & WIIPROTO_FLAGS_IR))
768        return;
769
770    /*
771     * Basic IR data is encoded into 3 bytes. The first two bytes are the
772     * lower 8 bit of the X/Y data, the 3rd byte contains the upper 2 bits
773     * of both.
774     * If data is packed, then the 3rd byte is put first and slightly
775     * reordered. This allows to interleave packed and non-packed data to
776     * have two IR sets in 5 bytes instead of 6.
777     * The resulting 10bit X/Y values are passed to the ABS_HATXY input dev.
778     */
779
780    if (packed) {
781        x = ir[1] | ((ir[0] & 0x03) << 8);
782        y = ir[2] | ((ir[0] & 0x0c) << 6);
783    } else {
784        x = ir[0] | ((ir[2] & 0x30) << 4);
785        y = ir[1] | ((ir[2] & 0xc0) << 2);
786    }
787
788    input_report_abs(wdata->ir, xid, x);
789    input_report_abs(wdata->ir, yid, y);
790}
791
792static void handler_status(struct wiimote_data *wdata, const __u8 *payload)
793{
794    handler_keys(wdata, payload);
795
796    /* on status reports the drm is reset so we need to resend the drm */
797    wiiproto_req_drm(wdata, WIIPROTO_REQ_NULL);
798
799    wiiext_event(wdata, payload[2] & 0x02);
800
801    if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_SREQ, 0)) {
802        wdata->state.cmd_battery = payload[5];
803        wiimote_cmd_complete(wdata);
804    }
805}
806
807static void handler_data(struct wiimote_data *wdata, const __u8 *payload)
808{
809    __u16 offset = payload[3] << 8 | payload[4];
810    __u8 size = (payload[2] >> 4) + 1;
811    __u8 err = payload[2] & 0x0f;
812
813    handler_keys(wdata, payload);
814
815    if (wiimote_cmd_pending(wdata, WIIPROTO_REQ_RMEM, offset)) {
816        if (err)
817            size = 0;
818        else if (size > wdata->state.cmd_read_size)
819            size = wdata->state.cmd_read_size;
820
821        wdata->state.cmd_read_size = size;
822        if (wdata->state.cmd_read_buf)
823            memcpy(wdata->state.cmd_read_buf, &payload[5], size);
824        wiimote_cmd_complete(wdata);
825    }
826}
827
828static void handler_return(struct wiimote_data *wdata, const __u8 *payload)
829{
830    __u8 err = payload[3];
831    __u8 cmd = payload[2];
832
833    handler_keys(wdata, payload);
834
835    if (wiimote_cmd_pending(wdata, cmd, 0)) {
836        wdata->state.cmd_err = err;
837        wiimote_cmd_complete(wdata);
838    } else if (err) {
839        hid_warn(wdata->hdev, "Remote error %hhu on req %hhu\n", err,
840                                    cmd);
841    }
842}
843
844static void handler_drm_KA(struct wiimote_data *wdata, const __u8 *payload)
845{
846    handler_keys(wdata, payload);
847    handler_accel(wdata, payload);
848}
849
850static void handler_drm_KE(struct wiimote_data *wdata, const __u8 *payload)
851{
852    handler_keys(wdata, payload);
853    wiiext_handle(wdata, &payload[2]);
854}
855
856static void handler_drm_KAI(struct wiimote_data *wdata, const __u8 *payload)
857{
858    handler_keys(wdata, payload);
859    handler_accel(wdata, payload);
860    ir_to_input0(wdata, &payload[5], false);
861    ir_to_input1(wdata, &payload[8], false);
862    ir_to_input2(wdata, &payload[11], false);
863    ir_to_input3(wdata, &payload[14], false);
864    input_sync(wdata->ir);
865}
866
867static void handler_drm_KEE(struct wiimote_data *wdata, const __u8 *payload)
868{
869    handler_keys(wdata, payload);
870    wiiext_handle(wdata, &payload[2]);
871}
872
873static void handler_drm_KIE(struct wiimote_data *wdata, const __u8 *payload)
874{
875    handler_keys(wdata, payload);
876    ir_to_input0(wdata, &payload[2], false);
877    ir_to_input1(wdata, &payload[4], true);
878    ir_to_input2(wdata, &payload[7], false);
879    ir_to_input3(wdata, &payload[9], true);
880    input_sync(wdata->ir);
881    wiiext_handle(wdata, &payload[12]);
882}
883
884static void handler_drm_KAE(struct wiimote_data *wdata, const __u8 *payload)
885{
886    handler_keys(wdata, payload);
887    handler_accel(wdata, payload);
888    wiiext_handle(wdata, &payload[5]);
889}
890
891static void handler_drm_KAIE(struct wiimote_data *wdata, const __u8 *payload)
892{
893    handler_keys(wdata, payload);
894    handler_accel(wdata, payload);
895    ir_to_input0(wdata, &payload[5], false);
896    ir_to_input1(wdata, &payload[7], true);
897    ir_to_input2(wdata, &payload[10], false);
898    ir_to_input3(wdata, &payload[12], true);
899    input_sync(wdata->ir);
900    wiiext_handle(wdata, &payload[15]);
901}
902
903static void handler_drm_E(struct wiimote_data *wdata, const __u8 *payload)
904{
905    wiiext_handle(wdata, payload);
906}
907
908static void handler_drm_SKAI1(struct wiimote_data *wdata, const __u8 *payload)
909{
910    handler_keys(wdata, payload);
911
912    wdata->state.accel_split[0] = payload[2];
913    wdata->state.accel_split[1] = (payload[0] >> 1) & (0x10 | 0x20);
914    wdata->state.accel_split[1] |= (payload[1] << 1) & (0x40 | 0x80);
915
916    ir_to_input0(wdata, &payload[3], false);
917    ir_to_input1(wdata, &payload[12], false);
918    input_sync(wdata->ir);
919}
920
921static void handler_drm_SKAI2(struct wiimote_data *wdata, const __u8 *payload)
922{
923    __u8 buf[5];
924
925    handler_keys(wdata, payload);
926
927    wdata->state.accel_split[1] |= (payload[0] >> 5) & (0x01 | 0x02);
928    wdata->state.accel_split[1] |= (payload[1] >> 3) & (0x04 | 0x08);
929
930    buf[0] = 0;
931    buf[1] = 0;
932    buf[2] = wdata->state.accel_split[0];
933    buf[3] = payload[2];
934    buf[4] = wdata->state.accel_split[1];
935    handler_accel(wdata, buf);
936
937    ir_to_input2(wdata, &payload[3], false);
938    ir_to_input3(wdata, &payload[12], false);
939    input_sync(wdata->ir);
940}
941
942struct wiiproto_handler {
943    __u8 id;
944    size_t size;
945    void (*func)(struct wiimote_data *wdata, const __u8 *payload);
946};
947
948static struct wiiproto_handler handlers[] = {
949    { .id = WIIPROTO_REQ_STATUS, .size = 6, .func = handler_status },
950    { .id = WIIPROTO_REQ_DATA, .size = 21, .func = handler_data },
951    { .id = WIIPROTO_REQ_RETURN, .size = 4, .func = handler_return },
952    { .id = WIIPROTO_REQ_DRM_K, .size = 2, .func = handler_keys },
953    { .id = WIIPROTO_REQ_DRM_KA, .size = 5, .func = handler_drm_KA },
954    { .id = WIIPROTO_REQ_DRM_KE, .size = 10, .func = handler_drm_KE },
955    { .id = WIIPROTO_REQ_DRM_KAI, .size = 17, .func = handler_drm_KAI },
956    { .id = WIIPROTO_REQ_DRM_KEE, .size = 21, .func = handler_drm_KEE },
957    { .id = WIIPROTO_REQ_DRM_KAE, .size = 21, .func = handler_drm_KAE },
958    { .id = WIIPROTO_REQ_DRM_KIE, .size = 21, .func = handler_drm_KIE },
959    { .id = WIIPROTO_REQ_DRM_KAIE, .size = 21, .func = handler_drm_KAIE },
960    { .id = WIIPROTO_REQ_DRM_E, .size = 21, .func = handler_drm_E },
961    { .id = WIIPROTO_REQ_DRM_SKAI1, .size = 21, .func = handler_drm_SKAI1 },
962    { .id = WIIPROTO_REQ_DRM_SKAI2, .size = 21, .func = handler_drm_SKAI2 },
963    { .id = 0 }
964};
965
966static int wiimote_hid_event(struct hid_device *hdev, struct hid_report *report,
967                            u8 *raw_data, int size)
968{
969    struct wiimote_data *wdata = hid_get_drvdata(hdev);
970    struct wiiproto_handler *h;
971    int i;
972    unsigned long flags;
973    bool handled = false;
974
975    if (size < 1)
976        return -EINVAL;
977
978    spin_lock_irqsave(&wdata->state.lock, flags);
979
980    for (i = 0; handlers[i].id; ++i) {
981        h = &handlers[i];
982        if (h->id == raw_data[0] && h->size < size) {
983            h->func(wdata, &raw_data[1]);
984            handled = true;
985        }
986    }
987
988    if (!handled)
989        hid_warn(hdev, "Unhandled report %hhu size %d\n", raw_data[0],
990                                    size);
991
992    spin_unlock_irqrestore(&wdata->state.lock, flags);
993
994    return 0;
995}
996
997static void wiimote_leds_destroy(struct wiimote_data *wdata)
998{
999    int i;
1000    struct led_classdev *led;
1001
1002    for (i = 0; i < 4; ++i) {
1003        if (wdata->leds[i]) {
1004            led = wdata->leds[i];
1005            wdata->leds[i] = NULL;
1006            led_classdev_unregister(led);
1007            kfree(led);
1008        }
1009    }
1010}
1011
1012static int wiimote_leds_create(struct wiimote_data *wdata)
1013{
1014    int i, ret;
1015    struct device *dev = &wdata->hdev->dev;
1016    size_t namesz = strlen(dev_name(dev)) + 9;
1017    struct led_classdev *led;
1018    char *name;
1019
1020    for (i = 0; i < 4; ++i) {
1021        led = kzalloc(sizeof(struct led_classdev) + namesz, GFP_KERNEL);
1022        if (!led) {
1023            ret = -ENOMEM;
1024            goto err;
1025        }
1026        name = (void*)&led[1];
1027        snprintf(name, namesz, "%s:blue:p%d", dev_name(dev), i);
1028        led->name = name;
1029        led->brightness = 0;
1030        led->max_brightness = 1;
1031        led->brightness_get = wiimote_leds_get;
1032        led->brightness_set = wiimote_leds_set;
1033
1034        ret = led_classdev_register(dev, led);
1035        if (ret) {
1036            kfree(led);
1037            goto err;
1038        }
1039        wdata->leds[i] = led;
1040    }
1041
1042    return 0;
1043
1044err:
1045    wiimote_leds_destroy(wdata);
1046    return ret;
1047}
1048
1049static struct wiimote_data *wiimote_create(struct hid_device *hdev)
1050{
1051    struct wiimote_data *wdata;
1052    int i;
1053
1054    wdata = kzalloc(sizeof(*wdata), GFP_KERNEL);
1055    if (!wdata)
1056        return NULL;
1057
1058    wdata->input = input_allocate_device();
1059    if (!wdata->input)
1060        goto err;
1061
1062    wdata->hdev = hdev;
1063    hid_set_drvdata(hdev, wdata);
1064
1065    input_set_drvdata(wdata->input, wdata);
1066    wdata->input->open = wiimote_input_open;
1067    wdata->input->close = wiimote_input_close;
1068    wdata->input->dev.parent = &wdata->hdev->dev;
1069    wdata->input->id.bustype = wdata->hdev->bus;
1070    wdata->input->id.vendor = wdata->hdev->vendor;
1071    wdata->input->id.product = wdata->hdev->product;
1072    wdata->input->id.version = wdata->hdev->version;
1073    wdata->input->name = WIIMOTE_NAME;
1074
1075    set_bit(EV_KEY, wdata->input->evbit);
1076    for (i = 0; i < WIIPROTO_KEY_COUNT; ++i)
1077        set_bit(wiiproto_keymap[i], wdata->input->keybit);
1078
1079    set_bit(FF_RUMBLE, wdata->input->ffbit);
1080    if (input_ff_create_memless(wdata->input, NULL, wiimote_ff_play))
1081        goto err_input;
1082
1083    wdata->accel = input_allocate_device();
1084    if (!wdata->accel)
1085        goto err_input;
1086
1087    input_set_drvdata(wdata->accel, wdata);
1088    wdata->accel->open = wiimote_accel_open;
1089    wdata->accel->close = wiimote_accel_close;
1090    wdata->accel->dev.parent = &wdata->hdev->dev;
1091    wdata->accel->id.bustype = wdata->hdev->bus;
1092    wdata->accel->id.vendor = wdata->hdev->vendor;
1093    wdata->accel->id.product = wdata->hdev->product;
1094    wdata->accel->id.version = wdata->hdev->version;
1095    wdata->accel->name = WIIMOTE_NAME " Accelerometer";
1096
1097    set_bit(EV_ABS, wdata->accel->evbit);
1098    set_bit(ABS_RX, wdata->accel->absbit);
1099    set_bit(ABS_RY, wdata->accel->absbit);
1100    set_bit(ABS_RZ, wdata->accel->absbit);
1101    input_set_abs_params(wdata->accel, ABS_RX, -500, 500, 2, 4);
1102    input_set_abs_params(wdata->accel, ABS_RY, -500, 500, 2, 4);
1103    input_set_abs_params(wdata->accel, ABS_RZ, -500, 500, 2, 4);
1104
1105    wdata->ir = input_allocate_device();
1106    if (!wdata->ir)
1107        goto err_ir;
1108
1109    input_set_drvdata(wdata->ir, wdata);
1110    wdata->ir->open = wiimote_ir_open;
1111    wdata->ir->close = wiimote_ir_close;
1112    wdata->ir->dev.parent = &wdata->hdev->dev;
1113    wdata->ir->id.bustype = wdata->hdev->bus;
1114    wdata->ir->id.vendor = wdata->hdev->vendor;
1115    wdata->ir->id.product = wdata->hdev->product;
1116    wdata->ir->id.version = wdata->hdev->version;
1117    wdata->ir->name = WIIMOTE_NAME " IR";
1118
1119    set_bit(EV_ABS, wdata->ir->evbit);
1120    set_bit(ABS_HAT0X, wdata->ir->absbit);
1121    set_bit(ABS_HAT0Y, wdata->ir->absbit);
1122    set_bit(ABS_HAT1X, wdata->ir->absbit);
1123    set_bit(ABS_HAT1Y, wdata->ir->absbit);
1124    set_bit(ABS_HAT2X, wdata->ir->absbit);
1125    set_bit(ABS_HAT2Y, wdata->ir->absbit);
1126    set_bit(ABS_HAT3X, wdata->ir->absbit);
1127    set_bit(ABS_HAT3Y, wdata->ir->absbit);
1128    input_set_abs_params(wdata->ir, ABS_HAT0X, 0, 1023, 2, 4);
1129    input_set_abs_params(wdata->ir, ABS_HAT0Y, 0, 767, 2, 4);
1130    input_set_abs_params(wdata->ir, ABS_HAT1X, 0, 1023, 2, 4);
1131    input_set_abs_params(wdata->ir, ABS_HAT1Y, 0, 767, 2, 4);
1132    input_set_abs_params(wdata->ir, ABS_HAT2X, 0, 1023, 2, 4);
1133    input_set_abs_params(wdata->ir, ABS_HAT2Y, 0, 767, 2, 4);
1134    input_set_abs_params(wdata->ir, ABS_HAT3X, 0, 1023, 2, 4);
1135    input_set_abs_params(wdata->ir, ABS_HAT3Y, 0, 767, 2, 4);
1136
1137    spin_lock_init(&wdata->qlock);
1138    INIT_WORK(&wdata->worker, wiimote_worker);
1139
1140    spin_lock_init(&wdata->state.lock);
1141    init_completion(&wdata->state.ready);
1142    mutex_init(&wdata->state.sync);
1143    wdata->state.drm = WIIPROTO_REQ_DRM_K;
1144
1145    return wdata;
1146
1147err_ir:
1148    input_free_device(wdata->accel);
1149err_input:
1150    input_free_device(wdata->input);
1151err:
1152    kfree(wdata);
1153    return NULL;
1154}
1155
1156static void wiimote_destroy(struct wiimote_data *wdata)
1157{
1158    wiidebug_deinit(wdata);
1159    wiiext_deinit(wdata);
1160    wiimote_leds_destroy(wdata);
1161
1162    power_supply_unregister(&wdata->battery);
1163    input_unregister_device(wdata->accel);
1164    input_unregister_device(wdata->ir);
1165    input_unregister_device(wdata->input);
1166    cancel_work_sync(&wdata->worker);
1167    hid_hw_stop(wdata->hdev);
1168
1169    kfree(wdata);
1170}
1171
1172static int wiimote_hid_probe(struct hid_device *hdev,
1173                const struct hid_device_id *id)
1174{
1175    struct wiimote_data *wdata;
1176    int ret;
1177
1178    hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1179
1180    wdata = wiimote_create(hdev);
1181    if (!wdata) {
1182        hid_err(hdev, "Can't alloc device\n");
1183        return -ENOMEM;
1184    }
1185
1186    ret = hid_parse(hdev);
1187    if (ret) {
1188        hid_err(hdev, "HID parse failed\n");
1189        goto err;
1190    }
1191
1192    ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
1193    if (ret) {
1194        hid_err(hdev, "HW start failed\n");
1195        goto err;
1196    }
1197
1198    ret = input_register_device(wdata->accel);
1199    if (ret) {
1200        hid_err(hdev, "Cannot register input device\n");
1201        goto err_stop;
1202    }
1203
1204    ret = input_register_device(wdata->ir);
1205    if (ret) {
1206        hid_err(hdev, "Cannot register input device\n");
1207        goto err_ir;
1208    }
1209
1210    ret = input_register_device(wdata->input);
1211    if (ret) {
1212        hid_err(hdev, "Cannot register input device\n");
1213        goto err_input;
1214    }
1215
1216    wdata->battery.properties = wiimote_battery_props;
1217    wdata->battery.num_properties = ARRAY_SIZE(wiimote_battery_props);
1218    wdata->battery.get_property = wiimote_battery_get_property;
1219    wdata->battery.name = "wiimote_battery";
1220    wdata->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1221    wdata->battery.use_for_apm = 0;
1222
1223    ret = power_supply_register(&wdata->hdev->dev, &wdata->battery);
1224    if (ret) {
1225        hid_err(hdev, "Cannot register battery device\n");
1226        goto err_battery;
1227    }
1228
1229    power_supply_powers(&wdata->battery, &hdev->dev);
1230
1231    ret = wiimote_leds_create(wdata);
1232    if (ret)
1233        goto err_free;
1234
1235    ret = wiiext_init(wdata);
1236    if (ret)
1237        goto err_free;
1238
1239    ret = wiidebug_init(wdata);
1240    if (ret)
1241        goto err_free;
1242
1243    hid_info(hdev, "New device registered\n");
1244
1245    /* by default set led1 after device initialization */
1246    spin_lock_irq(&wdata->state.lock);
1247    wiiproto_req_leds(wdata, WIIPROTO_FLAG_LED1);
1248    spin_unlock_irq(&wdata->state.lock);
1249
1250    return 0;
1251
1252err_free:
1253    wiimote_destroy(wdata);
1254    return ret;
1255
1256err_battery:
1257    input_unregister_device(wdata->input);
1258    wdata->input = NULL;
1259err_input:
1260    input_unregister_device(wdata->ir);
1261    wdata->ir = NULL;
1262err_ir:
1263    input_unregister_device(wdata->accel);
1264    wdata->accel = NULL;
1265err_stop:
1266    hid_hw_stop(hdev);
1267err:
1268    input_free_device(wdata->ir);
1269    input_free_device(wdata->accel);
1270    input_free_device(wdata->input);
1271    kfree(wdata);
1272    return ret;
1273}
1274
1275static void wiimote_hid_remove(struct hid_device *hdev)
1276{
1277    struct wiimote_data *wdata = hid_get_drvdata(hdev);
1278
1279    hid_info(hdev, "Device removed\n");
1280    wiimote_destroy(wdata);
1281}
1282
1283static const struct hid_device_id wiimote_hid_devices[] = {
1284    { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_NINTENDO,
1285                USB_DEVICE_ID_NINTENDO_WIIMOTE) },
1286    { }
1287};
1288MODULE_DEVICE_TABLE(hid, wiimote_hid_devices);
1289
1290static struct hid_driver wiimote_hid_driver = {
1291    .name = "wiimote",
1292    .id_table = wiimote_hid_devices,
1293    .probe = wiimote_hid_probe,
1294    .remove = wiimote_hid_remove,
1295    .raw_event = wiimote_hid_event,
1296};
1297
1298static int __init wiimote_init(void)
1299{
1300    int ret;
1301
1302    ret = hid_register_driver(&wiimote_hid_driver);
1303    if (ret)
1304        pr_err("Can't register wiimote hid driver\n");
1305
1306    return ret;
1307}
1308
1309static void __exit wiimote_exit(void)
1310{
1311    hid_unregister_driver(&wiimote_hid_driver);
1312}
1313
1314module_init(wiimote_init);
1315module_exit(wiimote_exit);
1316MODULE_LICENSE("GPL");
1317MODULE_AUTHOR("David Herrmann <dh.herrmann@gmail.com>");
1318MODULE_DESCRIPTION(WIIMOTE_NAME " Device Driver");
1319

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