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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * ati_remote2 - ATI/Philips USB RF remote driver
4 *
5 * Copyright (C) 2005-2008 Ville Syrjala <[email protected]>
6 * Copyright (C) 2007-2008 Peter Stokes <[email protected]>
7 */
8
9#include <linux/usb/input.h>
10#include <linux/slab.h>
11#include <linux/module.h>
12
13#define DRIVER_DESC "ATI/Philips USB RF remote driver"
14
15MODULE_DESCRIPTION(DRIVER_DESC);
16MODULE_AUTHOR("Ville Syrjala <[email protected]>");
17MODULE_LICENSE("GPL");
18
19/*
20 * ATI Remote Wonder II Channel Configuration
21 *
22 * The remote control can be assigned one of sixteen "channels" in order to facilitate
23 * the use of multiple remote controls within range of each other.
24 * A remote's "channel" may be altered by pressing and holding the "PC" button for
25 * approximately 3 seconds, after which the button will slowly flash the count of the
26 * currently configured "channel", using the numeric keypad enter a number between 1 and
27 * 16 and then press the "PC" button again, the button will slowly flash the count of the
28 * newly configured "channel".
29 */
30
31enum {
32 ATI_REMOTE2_MAX_CHANNEL_MASK = 0xFFFF,
33 ATI_REMOTE2_MAX_MODE_MASK = 0x1F,
34};
35
36static int ati_remote2_set_mask(const char *val,
37 const struct kernel_param *kp,
38 unsigned int max)
39{
40 unsigned int mask;
41 int ret;
42
43 if (!val)
44 return -EINVAL;
45
46 ret = kstrtouint(val, 0, &mask);
47 if (ret)
48 return ret;
49
50 if (mask & ~max)
51 return -EINVAL;
52
53 *(unsigned int *)kp->arg = mask;
54
55 return 0;
56}
57
58static int ati_remote2_set_channel_mask(const char *val,
59 const struct kernel_param *kp)
60{
61 pr_debug("%s()\n", __func__);
62
63 return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_CHANNEL_MASK);
64}
65
66static int ati_remote2_get_channel_mask(char *buffer,
67 const struct kernel_param *kp)
68{
69 pr_debug("%s()\n", __func__);
70
71 return sprintf(buffer, "0x%04x\n", *(unsigned int *)kp->arg);
72}
73
74static int ati_remote2_set_mode_mask(const char *val,
75 const struct kernel_param *kp)
76{
77 pr_debug("%s()\n", __func__);
78
79 return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_MODE_MASK);
80}
81
82static int ati_remote2_get_mode_mask(char *buffer,
83 const struct kernel_param *kp)
84{
85 pr_debug("%s()\n", __func__);
86
87 return sprintf(buffer, "0x%02x\n", *(unsigned int *)kp->arg);
88}
89
90static unsigned int channel_mask = ATI_REMOTE2_MAX_CHANNEL_MASK;
91#define param_check_channel_mask(name, p) __param_check(name, p, unsigned int)
92static const struct kernel_param_ops param_ops_channel_mask = {
93 .set = ati_remote2_set_channel_mask,
94 .get = ati_remote2_get_channel_mask,
95};
96module_param(channel_mask, channel_mask, 0644);
97MODULE_PARM_DESC(channel_mask, "Bitmask of channels to accept <15:Channel16>...<1:Channel2><0:Channel1>");
98
99static unsigned int mode_mask = ATI_REMOTE2_MAX_MODE_MASK;
100#define param_check_mode_mask(name, p) __param_check(name, p, unsigned int)
101static const struct kernel_param_ops param_ops_mode_mask = {
102 .set = ati_remote2_set_mode_mask,
103 .get = ati_remote2_get_mode_mask,
104};
105module_param(mode_mask, mode_mask, 0644);
106MODULE_PARM_DESC(mode_mask, "Bitmask of modes to accept <4:PC><3:AUX4><2:AUX3><1:AUX2><0:AUX1>");
107
108static const struct usb_device_id ati_remote2_id_table[] = {
109 { USB_DEVICE(0x0471, 0x0602) }, /* ATI Remote Wonder II */
110 { }
111};
112MODULE_DEVICE_TABLE(usb, ati_remote2_id_table);
113
114static DEFINE_MUTEX(ati_remote2_mutex);
115
116enum {
117 ATI_REMOTE2_OPENED = 0x1,
118 ATI_REMOTE2_SUSPENDED = 0x2,
119};
120
121enum {
122 ATI_REMOTE2_AUX1,
123 ATI_REMOTE2_AUX2,
124 ATI_REMOTE2_AUX3,
125 ATI_REMOTE2_AUX4,
126 ATI_REMOTE2_PC,
127 ATI_REMOTE2_MODES,
128};
129
130static const struct {
131 u8 hw_code;
132 u16 keycode;
133} ati_remote2_key_table[] = {
134 { 0x00, KEY_0 },
135 { 0x01, KEY_1 },
136 { 0x02, KEY_2 },
137 { 0x03, KEY_3 },
138 { 0x04, KEY_4 },
139 { 0x05, KEY_5 },
140 { 0x06, KEY_6 },
141 { 0x07, KEY_7 },
142 { 0x08, KEY_8 },
143 { 0x09, KEY_9 },
144 { 0x0c, KEY_POWER },
145 { 0x0d, KEY_MUTE },
146 { 0x10, KEY_VOLUMEUP },
147 { 0x11, KEY_VOLUMEDOWN },
148 { 0x20, KEY_CHANNELUP },
149 { 0x21, KEY_CHANNELDOWN },
150 { 0x28, KEY_FORWARD },
151 { 0x29, KEY_REWIND },
152 { 0x2c, KEY_PLAY },
153 { 0x30, KEY_PAUSE },
154 { 0x31, KEY_STOP },
155 { 0x37, KEY_RECORD },
156 { 0x38, KEY_DVD },
157 { 0x39, KEY_TV },
158 { 0x3f, KEY_PROG1 }, /* AUX1-AUX4 and PC */
159 { 0x54, KEY_MENU },
160 { 0x58, KEY_UP },
161 { 0x59, KEY_DOWN },
162 { 0x5a, KEY_LEFT },
163 { 0x5b, KEY_RIGHT },
164 { 0x5c, KEY_OK },
165 { 0x78, KEY_A },
166 { 0x79, KEY_B },
167 { 0x7a, KEY_C },
168 { 0x7b, KEY_D },
169 { 0x7c, KEY_E },
170 { 0x7d, KEY_F },
171 { 0x82, KEY_ENTER },
172 { 0x8e, KEY_VENDOR },
173 { 0x96, KEY_COFFEE },
174 { 0xa9, BTN_LEFT },
175 { 0xaa, BTN_RIGHT },
176 { 0xbe, KEY_QUESTION },
177 { 0xd0, KEY_EDIT },
178 { 0xd5, KEY_FRONT },
179 { 0xf9, KEY_INFO },
180};
181
182struct ati_remote2 {
183 struct input_dev *idev;
184 struct usb_device *udev;
185
186 struct usb_interface *intf[2];
187 struct usb_endpoint_descriptor *ep[2];
188 struct urb *urb[2];
189 void *buf[2];
190 dma_addr_t buf_dma[2];
191
192 unsigned long jiffies;
193 int mode;
194
195 char name[64];
196 char phys[64];
197
198 /* Each mode (AUX1-AUX4 and PC) can have an independent keymap. */
199 u16 keycode[ATI_REMOTE2_MODES][ARRAY_SIZE(ati_remote2_key_table)];
200
201 unsigned int flags;
202
203 unsigned int channel_mask;
204 unsigned int mode_mask;
205};
206
207static struct usb_driver ati_remote2_driver;
208
209static int ati_remote2_submit_urbs(struct ati_remote2 *ar2)
210{
211 int r;
212
213 r = usb_submit_urb(ar2->urb[0], GFP_KERNEL);
214 if (r) {
215 dev_err(&ar2->intf[0]->dev,
216 "%s(): usb_submit_urb() = %d\n", __func__, r);
217 return r;
218 }
219 r = usb_submit_urb(ar2->urb[1], GFP_KERNEL);
220 if (r) {
221 usb_kill_urb(ar2->urb[0]);
222 dev_err(&ar2->intf[1]->dev,
223 "%s(): usb_submit_urb() = %d\n", __func__, r);
224 return r;
225 }
226
227 return 0;
228}
229
230static void ati_remote2_kill_urbs(struct ati_remote2 *ar2)
231{
232 usb_kill_urb(ar2->urb[1]);
233 usb_kill_urb(ar2->urb[0]);
234}
235
236static int ati_remote2_open(struct input_dev *idev)
237{
238 struct ati_remote2 *ar2 = input_get_drvdata(idev);
239 int r;
240
241 dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
242
243 r = usb_autopm_get_interface(ar2->intf[0]);
244 if (r) {
245 dev_err(&ar2->intf[0]->dev,
246 "%s(): usb_autopm_get_interface() = %d\n", __func__, r);
247 return r;
248 }
249
250 scoped_guard(mutex, &ati_remote2_mutex) {
251 if (!(ar2->flags & ATI_REMOTE2_SUSPENDED)) {
252 r = ati_remote2_submit_urbs(ar2);
253 if (r)
254 break;
255 }
256
257 ar2->flags |= ATI_REMOTE2_OPENED;
258 }
259
260 usb_autopm_put_interface(ar2->intf[0]);
261
262 return r;
263}
264
265static void ati_remote2_close(struct input_dev *idev)
266{
267 struct ati_remote2 *ar2 = input_get_drvdata(idev);
268
269 dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
270
271 guard(mutex)(&ati_remote2_mutex);
272
273 if (!(ar2->flags & ATI_REMOTE2_SUSPENDED))
274 ati_remote2_kill_urbs(ar2);
275
276 ar2->flags &= ~ATI_REMOTE2_OPENED;
277}
278
279static void ati_remote2_input_mouse(struct ati_remote2 *ar2)
280{
281 struct input_dev *idev = ar2->idev;
282 u8 *data = ar2->buf[0];
283 int channel, mode;
284
285 channel = data[0] >> 4;
286
287 if (!((1 << channel) & ar2->channel_mask))
288 return;
289
290 mode = data[0] & 0x0F;
291
292 if (mode > ATI_REMOTE2_PC) {
293 dev_err(&ar2->intf[0]->dev,
294 "Unknown mode byte (%02x %02x %02x %02x)\n",
295 data[3], data[2], data[1], data[0]);
296 return;
297 }
298
299 if (!((1 << mode) & ar2->mode_mask))
300 return;
301
302 input_event(idev, EV_REL, REL_X, (s8) data[1]);
303 input_event(idev, EV_REL, REL_Y, (s8) data[2]);
304 input_sync(idev);
305}
306
307static int ati_remote2_lookup(unsigned int hw_code)
308{
309 int i;
310
311 for (i = 0; i < ARRAY_SIZE(ati_remote2_key_table); i++)
312 if (ati_remote2_key_table[i].hw_code == hw_code)
313 return i;
314
315 return -1;
316}
317
318static void ati_remote2_input_key(struct ati_remote2 *ar2)
319{
320 struct input_dev *idev = ar2->idev;
321 u8 *data = ar2->buf[1];
322 int channel, mode, hw_code, index;
323
324 channel = data[0] >> 4;
325
326 if (!((1 << channel) & ar2->channel_mask))
327 return;
328
329 mode = data[0] & 0x0F;
330
331 if (mode > ATI_REMOTE2_PC) {
332 dev_err(&ar2->intf[1]->dev,
333 "Unknown mode byte (%02x %02x %02x %02x)\n",
334 data[3], data[2], data[1], data[0]);
335 return;
336 }
337
338 hw_code = data[2];
339 if (hw_code == 0x3f) {
340 /*
341 * For some incomprehensible reason the mouse pad generates
342 * events which look identical to the events from the last
343 * pressed mode key. Naturally we don't want to generate key
344 * events for the mouse pad so we filter out any subsequent
345 * events from the same mode key.
346 */
347 if (ar2->mode == mode)
348 return;
349
350 if (data[1] == 0)
351 ar2->mode = mode;
352 }
353
354 if (!((1 << mode) & ar2->mode_mask))
355 return;
356
357 index = ati_remote2_lookup(hw_code);
358 if (index < 0) {
359 dev_err(&ar2->intf[1]->dev,
360 "Unknown code byte (%02x %02x %02x %02x)\n",
361 data[3], data[2], data[1], data[0]);
362 return;
363 }
364
365 switch (data[1]) {
366 case 0: /* release */
367 break;
368 case 1: /* press */
369 ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_DELAY]);
370 break;
371 case 2: /* repeat */
372
373 /* No repeat for mouse buttons. */
374 if (ar2->keycode[mode][index] == BTN_LEFT ||
375 ar2->keycode[mode][index] == BTN_RIGHT)
376 return;
377
378 if (!time_after_eq(jiffies, ar2->jiffies))
379 return;
380
381 ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_PERIOD]);
382 break;
383 default:
384 dev_err(&ar2->intf[1]->dev,
385 "Unknown state byte (%02x %02x %02x %02x)\n",
386 data[3], data[2], data[1], data[0]);
387 return;
388 }
389
390 input_event(idev, EV_KEY, ar2->keycode[mode][index], data[1]);
391 input_sync(idev);
392}
393
394static void ati_remote2_complete_mouse(struct urb *urb)
395{
396 struct ati_remote2 *ar2 = urb->context;
397 int r;
398
399 switch (urb->status) {
400 case 0:
401 usb_mark_last_busy(ar2->udev);
402 ati_remote2_input_mouse(ar2);
403 break;
404 case -ENOENT:
405 case -EILSEQ:
406 case -ECONNRESET:
407 case -ESHUTDOWN:
408 dev_dbg(&ar2->intf[0]->dev,
409 "%s(): urb status = %d\n", __func__, urb->status);
410 return;
411 default:
412 usb_mark_last_busy(ar2->udev);
413 dev_err(&ar2->intf[0]->dev,
414 "%s(): urb status = %d\n", __func__, urb->status);
415 }
416
417 r = usb_submit_urb(urb, GFP_ATOMIC);
418 if (r)
419 dev_err(&ar2->intf[0]->dev,
420 "%s(): usb_submit_urb() = %d\n", __func__, r);
421}
422
423static void ati_remote2_complete_key(struct urb *urb)
424{
425 struct ati_remote2 *ar2 = urb->context;
426 int r;
427
428 switch (urb->status) {
429 case 0:
430 usb_mark_last_busy(ar2->udev);
431 ati_remote2_input_key(ar2);
432 break;
433 case -ENOENT:
434 case -EILSEQ:
435 case -ECONNRESET:
436 case -ESHUTDOWN:
437 dev_dbg(&ar2->intf[1]->dev,
438 "%s(): urb status = %d\n", __func__, urb->status);
439 return;
440 default:
441 usb_mark_last_busy(ar2->udev);
442 dev_err(&ar2->intf[1]->dev,
443 "%s(): urb status = %d\n", __func__, urb->status);
444 }
445
446 r = usb_submit_urb(urb, GFP_ATOMIC);
447 if (r)
448 dev_err(&ar2->intf[1]->dev,
449 "%s(): usb_submit_urb() = %d\n", __func__, r);
450}
451
452static int ati_remote2_getkeycode(struct input_dev *idev,
453 struct input_keymap_entry *ke)
454{
455 struct ati_remote2 *ar2 = input_get_drvdata(idev);
456 unsigned int mode;
457 int offset;
458 unsigned int index;
459 unsigned int scancode;
460
461 if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
462 index = ke->index;
463 if (index >= ATI_REMOTE2_MODES *
464 ARRAY_SIZE(ati_remote2_key_table))
465 return -EINVAL;
466
467 mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
468 offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
469 scancode = (mode << 8) + ati_remote2_key_table[offset].hw_code;
470 } else {
471 if (input_scancode_to_scalar(ke, &scancode))
472 return -EINVAL;
473
474 mode = scancode >> 8;
475 if (mode > ATI_REMOTE2_PC)
476 return -EINVAL;
477
478 offset = ati_remote2_lookup(scancode & 0xff);
479 if (offset < 0)
480 return -EINVAL;
481
482 index = mode * ARRAY_SIZE(ati_remote2_key_table) + offset;
483 }
484
485 ke->keycode = ar2->keycode[mode][offset];
486 ke->len = sizeof(scancode);
487 memcpy(&ke->scancode, &scancode, sizeof(scancode));
488 ke->index = index;
489
490 return 0;
491}
492
493static int ati_remote2_setkeycode(struct input_dev *idev,
494 const struct input_keymap_entry *ke,
495 unsigned int *old_keycode)
496{
497 struct ati_remote2 *ar2 = input_get_drvdata(idev);
498 unsigned int mode;
499 int offset;
500 unsigned int index;
501 unsigned int scancode;
502
503 if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
504 if (ke->index >= ATI_REMOTE2_MODES *
505 ARRAY_SIZE(ati_remote2_key_table))
506 return -EINVAL;
507
508 mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
509 offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
510 } else {
511 if (input_scancode_to_scalar(ke, &scancode))
512 return -EINVAL;
513
514 mode = scancode >> 8;
515 if (mode > ATI_REMOTE2_PC)
516 return -EINVAL;
517
518 offset = ati_remote2_lookup(scancode & 0xff);
519 if (offset < 0)
520 return -EINVAL;
521 }
522
523 *old_keycode = ar2->keycode[mode][offset];
524 ar2->keycode[mode][offset] = ke->keycode;
525 __set_bit(ke->keycode, idev->keybit);
526
527 for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
528 for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
529 if (ar2->keycode[mode][index] == *old_keycode)
530 return 0;
531 }
532 }
533
534 __clear_bit(*old_keycode, idev->keybit);
535
536 return 0;
537}
538
539static int ati_remote2_input_init(struct ati_remote2 *ar2)
540{
541 struct input_dev *idev;
542 int index, mode, retval;
543
544 idev = input_allocate_device();
545 if (!idev)
546 return -ENOMEM;
547
548 ar2->idev = idev;
549 input_set_drvdata(idev, ar2);
550
551 idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
552 idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
553 BIT_MASK(BTN_RIGHT);
554 idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
555
556 for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
557 for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
558 ar2->keycode[mode][index] = ati_remote2_key_table[index].keycode;
559 __set_bit(ar2->keycode[mode][index], idev->keybit);
560 }
561 }
562
563 /* AUX1-AUX4 and PC generate the same scancode. */
564 index = ati_remote2_lookup(0x3f);
565 ar2->keycode[ATI_REMOTE2_AUX1][index] = KEY_PROG1;
566 ar2->keycode[ATI_REMOTE2_AUX2][index] = KEY_PROG2;
567 ar2->keycode[ATI_REMOTE2_AUX3][index] = KEY_PROG3;
568 ar2->keycode[ATI_REMOTE2_AUX4][index] = KEY_PROG4;
569 ar2->keycode[ATI_REMOTE2_PC][index] = KEY_PC;
570 __set_bit(KEY_PROG1, idev->keybit);
571 __set_bit(KEY_PROG2, idev->keybit);
572 __set_bit(KEY_PROG3, idev->keybit);
573 __set_bit(KEY_PROG4, idev->keybit);
574 __set_bit(KEY_PC, idev->keybit);
575
576 idev->rep[REP_DELAY] = 250;
577 idev->rep[REP_PERIOD] = 33;
578
579 idev->open = ati_remote2_open;
580 idev->close = ati_remote2_close;
581
582 idev->getkeycode = ati_remote2_getkeycode;
583 idev->setkeycode = ati_remote2_setkeycode;
584
585 idev->name = ar2->name;
586 idev->phys = ar2->phys;
587
588 usb_to_input_id(ar2->udev, &idev->id);
589 idev->dev.parent = &ar2->udev->dev;
590
591 retval = input_register_device(idev);
592 if (retval)
593 input_free_device(idev);
594
595 return retval;
596}
597
598static int ati_remote2_urb_init(struct ati_remote2 *ar2)
599{
600 struct usb_device *udev = ar2->udev;
601 int i, pipe, maxp;
602
603 for (i = 0; i < 2; i++) {
604 ar2->buf[i] = usb_alloc_coherent(udev, 4, GFP_KERNEL, &ar2->buf_dma[i]);
605 if (!ar2->buf[i])
606 return -ENOMEM;
607
608 ar2->urb[i] = usb_alloc_urb(0, GFP_KERNEL);
609 if (!ar2->urb[i])
610 return -ENOMEM;
611
612 pipe = usb_rcvintpipe(udev, ar2->ep[i]->bEndpointAddress);
613 maxp = usb_maxpacket(udev, pipe);
614 maxp = maxp > 4 ? 4 : maxp;
615
616 usb_fill_int_urb(ar2->urb[i], udev, pipe, ar2->buf[i], maxp,
617 i ? ati_remote2_complete_key : ati_remote2_complete_mouse,
618 ar2, ar2->ep[i]->bInterval);
619 ar2->urb[i]->transfer_dma = ar2->buf_dma[i];
620 ar2->urb[i]->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
621 }
622
623 return 0;
624}
625
626static void ati_remote2_urb_cleanup(struct ati_remote2 *ar2)
627{
628 int i;
629
630 for (i = 0; i < 2; i++) {
631 usb_free_urb(ar2->urb[i]);
632 usb_free_coherent(ar2->udev, 4, ar2->buf[i], ar2->buf_dma[i]);
633 }
634}
635
636static int ati_remote2_setup(struct ati_remote2 *ar2, unsigned int ch_mask)
637{
638 int r, i, channel;
639
640 /*
641 * Configure receiver to only accept input from remote "channel"
642 * channel == 0 -> Accept input from any remote channel
643 * channel == 1 -> Only accept input from remote channel 1
644 * channel == 2 -> Only accept input from remote channel 2
645 * ...
646 * channel == 16 -> Only accept input from remote channel 16
647 */
648
649 channel = 0;
650 for (i = 0; i < 16; i++) {
651 if ((1 << i) & ch_mask) {
652 if (!(~(1 << i) & ch_mask))
653 channel = i + 1;
654 break;
655 }
656 }
657
658 r = usb_control_msg(ar2->udev, usb_sndctrlpipe(ar2->udev, 0),
659 0x20,
660 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
661 channel, 0x0, NULL, 0, USB_CTRL_SET_TIMEOUT);
662 if (r) {
663 dev_err(&ar2->udev->dev, "%s - failed to set channel due to error: %d\n",
664 __func__, r);
665 return r;
666 }
667
668 return 0;
669}
670
671static ssize_t ati_remote2_show_channel_mask(struct device *dev,
672 struct device_attribute *attr,
673 char *buf)
674{
675 struct usb_interface *intf = to_usb_interface(dev);
676 struct ati_remote2 *ar2 = usb_get_intfdata(intf);
677
678 return sprintf(buf, "0x%04x\n", ar2->channel_mask);
679}
680
681static ssize_t ati_remote2_store_channel_mask(struct device *dev,
682 struct device_attribute *attr,
683 const char *buf, size_t count)
684{
685 struct usb_interface *intf = to_usb_interface(dev);
686 struct ati_remote2 *ar2 = usb_get_intfdata(intf);
687 unsigned int mask;
688 int r;
689
690 r = kstrtouint(buf, 0, &mask);
691 if (r)
692 return r;
693
694 if (mask & ~ATI_REMOTE2_MAX_CHANNEL_MASK)
695 return -EINVAL;
696
697 r = usb_autopm_get_interface(ar2->intf[0]);
698 if (r) {
699 dev_err(&ar2->intf[0]->dev,
700 "%s(): usb_autopm_get_interface() = %d\n", __func__, r);
701 return r;
702 }
703
704 scoped_guard(mutex, &ati_remote2_mutex) {
705 if (mask != ar2->channel_mask) {
706 r = ati_remote2_setup(ar2, mask);
707 if (!r)
708 ar2->channel_mask = mask;
709 }
710 }
711
712 usb_autopm_put_interface(ar2->intf[0]);
713
714 return r ? r : count;
715}
716
717static ssize_t ati_remote2_show_mode_mask(struct device *dev,
718 struct device_attribute *attr,
719 char *buf)
720{
721 struct usb_interface *intf = to_usb_interface(dev);
722 struct ati_remote2 *ar2 = usb_get_intfdata(intf);
723
724 return sprintf(buf, "0x%02x\n", ar2->mode_mask);
725}
726
727static ssize_t ati_remote2_store_mode_mask(struct device *dev,
728 struct device_attribute *attr,
729 const char *buf, size_t count)
730{
731 struct usb_interface *intf = to_usb_interface(dev);
732 struct ati_remote2 *ar2 = usb_get_intfdata(intf);
733 unsigned int mask;
734 int err;
735
736 err = kstrtouint(buf, 0, &mask);
737 if (err)
738 return err;
739
740 if (mask & ~ATI_REMOTE2_MAX_MODE_MASK)
741 return -EINVAL;
742
743 ar2->mode_mask = mask;
744
745 return count;
746}
747
748static DEVICE_ATTR(channel_mask, 0644, ati_remote2_show_channel_mask,
749 ati_remote2_store_channel_mask);
750
751static DEVICE_ATTR(mode_mask, 0644, ati_remote2_show_mode_mask,
752 ati_remote2_store_mode_mask);
753
754static struct attribute *ati_remote2_attrs[] = {
755 &dev_attr_channel_mask.attr,
756 &dev_attr_mode_mask.attr,
757 NULL,
758};
759ATTRIBUTE_GROUPS(ati_remote2);
760
761static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id)
762{
763 struct usb_device *udev = interface_to_usbdev(interface);
764 struct usb_host_interface *alt = interface->cur_altsetting;
765 struct ati_remote2 *ar2;
766 int r;
767
768 if (alt->desc.bInterfaceNumber)
769 return -ENODEV;
770
771 ar2 = kzalloc_obj(struct ati_remote2);
772 if (!ar2)
773 return -ENOMEM;
774
775 ar2->udev = udev;
776
777 /* Sanity check, first interface must have an endpoint */
778 if (alt->desc.bNumEndpoints < 1 || !alt->endpoint) {
779 dev_err(&interface->dev,
780 "%s(): interface 0 must have an endpoint\n", __func__);
781 r = -ENODEV;
782 goto fail1;
783 }
784 ar2->intf[0] = interface;
785 ar2->ep[0] = &alt->endpoint[0].desc;
786
787 /* Sanity check, the device must have two interfaces */
788 ar2->intf[1] = usb_ifnum_to_if(udev, 1);
789 if ((udev->actconfig->desc.bNumInterfaces < 2) || !ar2->intf[1]) {
790 dev_err(&interface->dev, "%s(): need 2 interfaces, found %d\n",
791 __func__, udev->actconfig->desc.bNumInterfaces);
792 r = -ENODEV;
793 goto fail1;
794 }
795
796 r = usb_driver_claim_interface(&ati_remote2_driver, ar2->intf[1], ar2);
797 if (r)
798 goto fail1;
799
800 /* Sanity check, second interface must have an endpoint */
801 alt = ar2->intf[1]->cur_altsetting;
802 if (alt->desc.bNumEndpoints < 1 || !alt->endpoint) {
803 dev_err(&interface->dev,
804 "%s(): interface 1 must have an endpoint\n", __func__);
805 r = -ENODEV;
806 goto fail2;
807 }
808 ar2->ep[1] = &alt->endpoint[0].desc;
809
810 r = ati_remote2_urb_init(ar2);
811 if (r)
812 goto fail3;
813
814 ar2->channel_mask = channel_mask;
815 ar2->mode_mask = mode_mask;
816
817 r = ati_remote2_setup(ar2, ar2->channel_mask);
818 if (r)
819 goto fail3;
820
821 usb_make_path(udev, ar2->phys, sizeof(ar2->phys));
822 strlcat(ar2->phys, "/input0", sizeof(ar2->phys));
823
824 strlcat(ar2->name, "ATI Remote Wonder II", sizeof(ar2->name));
825
826 r = ati_remote2_input_init(ar2);
827 if (r)
828 goto fail3;
829
830 usb_set_intfdata(interface, ar2);
831
832 interface->needs_remote_wakeup = 1;
833
834 return 0;
835
836 fail3:
837 ati_remote2_urb_cleanup(ar2);
838 fail2:
839 usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
840 fail1:
841 kfree(ar2);
842
843 return r;
844}
845
846static void ati_remote2_disconnect(struct usb_interface *interface)
847{
848 struct ati_remote2 *ar2;
849 struct usb_host_interface *alt = interface->cur_altsetting;
850
851 if (alt->desc.bInterfaceNumber)
852 return;
853
854 ar2 = usb_get_intfdata(interface);
855 usb_set_intfdata(interface, NULL);
856
857 input_unregister_device(ar2->idev);
858
859 ati_remote2_urb_cleanup(ar2);
860
861 usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
862
863 kfree(ar2);
864}
865
866static int ati_remote2_suspend(struct usb_interface *interface,
867 pm_message_t message)
868{
869 struct ati_remote2 *ar2;
870 struct usb_host_interface *alt = interface->cur_altsetting;
871
872 if (alt->desc.bInterfaceNumber)
873 return 0;
874
875 ar2 = usb_get_intfdata(interface);
876
877 dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
878
879 guard(mutex)(&ati_remote2_mutex);
880
881 if (ar2->flags & ATI_REMOTE2_OPENED)
882 ati_remote2_kill_urbs(ar2);
883
884 ar2->flags |= ATI_REMOTE2_SUSPENDED;
885
886 return 0;
887}
888
889static int ati_remote2_resume(struct usb_interface *interface)
890{
891 struct ati_remote2 *ar2;
892 struct usb_host_interface *alt = interface->cur_altsetting;
893 int r = 0;
894
895 if (alt->desc.bInterfaceNumber)
896 return 0;
897
898 ar2 = usb_get_intfdata(interface);
899
900 dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
901
902 guard(mutex)(&ati_remote2_mutex);
903
904 if (ar2->flags & ATI_REMOTE2_OPENED)
905 r = ati_remote2_submit_urbs(ar2);
906
907 if (!r)
908 ar2->flags &= ~ATI_REMOTE2_SUSPENDED;
909
910 return r;
911}
912
913static int ati_remote2_reset_resume(struct usb_interface *interface)
914{
915 struct ati_remote2 *ar2;
916 struct usb_host_interface *alt = interface->cur_altsetting;
917 int r = 0;
918
919 if (alt->desc.bInterfaceNumber)
920 return 0;
921
922 ar2 = usb_get_intfdata(interface);
923
924 dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
925
926 guard(mutex)(&ati_remote2_mutex);
927
928 r = ati_remote2_setup(ar2, ar2->channel_mask);
929 if (r)
930 return r;
931
932 if (ar2->flags & ATI_REMOTE2_OPENED)
933 r = ati_remote2_submit_urbs(ar2);
934
935 if (!r)
936 ar2->flags &= ~ATI_REMOTE2_SUSPENDED;
937
938 return r;
939}
940
941static int ati_remote2_pre_reset(struct usb_interface *interface)
942{
943 struct ati_remote2 *ar2;
944 struct usb_host_interface *alt = interface->cur_altsetting;
945
946 if (alt->desc.bInterfaceNumber)
947 return 0;
948
949 ar2 = usb_get_intfdata(interface);
950
951 dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
952
953 mutex_lock(&ati_remote2_mutex);
954
955 if (ar2->flags == ATI_REMOTE2_OPENED)
956 ati_remote2_kill_urbs(ar2);
957
958 return 0;
959}
960
961static int ati_remote2_post_reset(struct usb_interface *interface)
962{
963 struct ati_remote2 *ar2;
964 struct usb_host_interface *alt = interface->cur_altsetting;
965 int r = 0;
966
967 if (alt->desc.bInterfaceNumber)
968 return 0;
969
970 ar2 = usb_get_intfdata(interface);
971
972 dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
973
974 if (ar2->flags == ATI_REMOTE2_OPENED)
975 r = ati_remote2_submit_urbs(ar2);
976
977 mutex_unlock(&ati_remote2_mutex);
978
979 return r;
980}
981
982static struct usb_driver ati_remote2_driver = {
983 .name = "ati_remote2",
984 .probe = ati_remote2_probe,
985 .disconnect = ati_remote2_disconnect,
986 .dev_groups = ati_remote2_groups,
987 .id_table = ati_remote2_id_table,
988 .suspend = ati_remote2_suspend,
989 .resume = ati_remote2_resume,
990 .reset_resume = ati_remote2_reset_resume,
991 .pre_reset = ati_remote2_pre_reset,
992 .post_reset = ati_remote2_post_reset,
993 .supports_autosuspend = 1,
994};
995
996module_usb_driver(ati_remote2_driver);