drivers/input/misc/ati_remote2.c

   1 /*
   2  * ati_remote2 - ATI/Philips USB RF remote driver
   3  *
   4  * Copyright (C) 2005-2008 Ville Syrjala <syrjala@sci.fi>
   5  * Copyright (C) 2007-2008 Peter Stokes <linux@dadeos.co.uk>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2
   9  * as published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/usb/input.h>
  13 #include <linux/slab.h>
  14 #include <linux/module.h>
  15
  16 #define DRIVER_DESC    "ATI/Philips USB RF remote driver"
  17 #define DRIVER_VERSION "0.3"
  18
  19 MODULE_DESCRIPTION(DRIVER_DESC);
  20 MODULE_VERSION(DRIVER_VERSION);
  21 MODULE_AUTHOR("Ville Syrjala <syrjala@sci.fi>");
  22 MODULE_LICENSE("GPL");
  23
  24 /*
  25  * ATI Remote Wonder II Channel Configuration
  26  *
  27  * The remote control can by assigned one of sixteen "channels" in order to facilitate
  28  * the use of multiple remote controls within range of each other.
  29  * A remote's "channel" may be altered by pressing and holding the "PC" button for
  30  * approximately 3 seconds, after which the button will slowly flash the count of the
  31  * currently configured "channel", using the numeric keypad enter a number between 1 and
  32  * 16 and then press the "PC" button again, the button will slowly flash the count of the
  33  * newly configured "channel".
  34  */
  35
  36 enum {
  37         ATI_REMOTE2_MAX_CHANNEL_MASK = 0xFFFF,
  38         ATI_REMOTE2_MAX_MODE_MASK = 0x1F,
  39 };
  40
  41 static int ati_remote2_set_mask(const char *val,
  42                                 const struct kernel_param *kp,
  43                                 unsigned int max)
  44 {
  45         unsigned int mask;
  46         int ret;
  47
  48         if (!val)
  49                 return -EINVAL;
  50
  51         ret = kstrtouint(val, 0, &mask);
  52         if (ret)
  53                 return ret;
  54
  55         if (mask & ~max)
  56                 return -EINVAL;
  57
  58         *(unsigned int *)kp->arg = mask;
  59
  60         return 0;
  61 }
  62
  63 static int ati_remote2_set_channel_mask(const char *val,
  64                                         const struct kernel_param *kp)
  65 {
  66         pr_debug("%s()\n", __func__);
  67
  68         return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_CHANNEL_MASK);
  69 }
  70
  71 static int ati_remote2_get_channel_mask(char *buffer,
  72                                         const struct kernel_param *kp)
  73 {
  74         pr_debug("%s()\n", __func__);
  75
  76         return sprintf(buffer, "0x%04x", *(unsigned int *)kp->arg);
  77 }
  78
  79 static int ati_remote2_set_mode_mask(const char *val,
  80                                      const struct kernel_param *kp)
  81 {
  82         pr_debug("%s()\n", __func__);
  83
  84         return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_MODE_MASK);
  85 }
  86
  87 static int ati_remote2_get_mode_mask(char *buffer,
  88                                      const struct kernel_param *kp)
  89 {
  90         pr_debug("%s()\n", __func__);
  91
  92         return sprintf(buffer, "0x%02x", *(unsigned int *)kp->arg);
  93 }
  94
  95 static unsigned int channel_mask = ATI_REMOTE2_MAX_CHANNEL_MASK;
  96 #define param_check_channel_mask(name, p) __param_check(name, p, unsigned int)
  97 static struct kernel_param_ops param_ops_channel_mask = {
  98         .set = ati_remote2_set_channel_mask,
  99         .get = ati_remote2_get_channel_mask,
 100 };
 101 module_param(channel_mask, channel_mask, 0644);
 102 MODULE_PARM_DESC(channel_mask, "Bitmask of channels to accept <15:Channel16>...<1:Channel2><0:Channel1>");
 103
 104 static unsigned int mode_mask = ATI_REMOTE2_MAX_MODE_MASK;
 105 #define param_check_mode_mask(name, p) __param_check(name, p, unsigned int)
 106 static struct kernel_param_ops param_ops_mode_mask = {
 107         .set = ati_remote2_set_mode_mask,
 108         .get = ati_remote2_get_mode_mask,
 109 };
 110 module_param(mode_mask, mode_mask, 0644);
 111 MODULE_PARM_DESC(mode_mask, "Bitmask of modes to accept <4:PC><3:AUX4><2:AUX3><1:AUX2><0:AUX1>");
 112
 113 static struct usb_device_id ati_remote2_id_table[] = {
 114         { USB_DEVICE(0x0471, 0x0602) }, /* ATI Remote Wonder II */
 115         { }
 116 };
 117 MODULE_DEVICE_TABLE(usb, ati_remote2_id_table);
 118
 119 static DEFINE_MUTEX(ati_remote2_mutex);
 120
 121 enum {
 122         ATI_REMOTE2_OPENED = 0x1,
 123         ATI_REMOTE2_SUSPENDED = 0x2,
 124 };
 125
 126 enum {
 127         ATI_REMOTE2_AUX1,
 128         ATI_REMOTE2_AUX2,
 129         ATI_REMOTE2_AUX3,
 130         ATI_REMOTE2_AUX4,
 131         ATI_REMOTE2_PC,
 132         ATI_REMOTE2_MODES,
 133 };
 134
 135 static const struct {
 136         u8  hw_code;
 137         u16 keycode;
 138 } ati_remote2_key_table[] = {
 139         { 0x00, KEY_0 },
 140         { 0x01, KEY_1 },
 141         { 0x02, KEY_2 },
 142         { 0x03, KEY_3 },
 143         { 0x04, KEY_4 },
 144         { 0x05, KEY_5 },
 145         { 0x06, KEY_6 },
 146         { 0x07, KEY_7 },
 147         { 0x08, KEY_8 },
 148         { 0x09, KEY_9 },
 149         { 0x0c, KEY_POWER },
 150         { 0x0d, KEY_MUTE },
 151         { 0x10, KEY_VOLUMEUP },
 152         { 0x11, KEY_VOLUMEDOWN },
 153         { 0x20, KEY_CHANNELUP },
 154         { 0x21, KEY_CHANNELDOWN },
 155         { 0x28, KEY_FORWARD },
 156         { 0x29, KEY_REWIND },
 157         { 0x2c, KEY_PLAY },
 158         { 0x30, KEY_PAUSE },
 159         { 0x31, KEY_STOP },
 160         { 0x37, KEY_RECORD },
 161         { 0x38, KEY_DVD },
 162         { 0x39, KEY_TV },
 163         { 0x3f, KEY_PROG1 }, /* AUX1-AUX4 and PC */
 164         { 0x54, KEY_MENU },
 165         { 0x58, KEY_UP },
 166         { 0x59, KEY_DOWN },
 167         { 0x5a, KEY_LEFT },
 168         { 0x5b, KEY_RIGHT },
 169         { 0x5c, KEY_OK },
 170         { 0x78, KEY_A },
 171         { 0x79, KEY_B },
 172         { 0x7a, KEY_C },
 173         { 0x7b, KEY_D },
 174         { 0x7c, KEY_E },
 175         { 0x7d, KEY_F },
 176         { 0x82, KEY_ENTER },
 177         { 0x8e, KEY_VENDOR },
 178         { 0x96, KEY_COFFEE },
 179         { 0xa9, BTN_LEFT },
 180         { 0xaa, BTN_RIGHT },
 181         { 0xbe, KEY_QUESTION },
 182         { 0xd0, KEY_EDIT },
 183         { 0xd5, KEY_FRONT },
 184         { 0xf9, KEY_INFO },
 185 };
 186
 187 struct ati_remote2 {
 188         struct input_dev *idev;
 189         struct usb_device *udev;
 190
 191         struct usb_interface *intf[2];
 192         struct usb_endpoint_descriptor *ep[2];
 193         struct urb *urb[2];
 194         void *buf[2];
 195         dma_addr_t buf_dma[2];
 196
 197         unsigned long jiffies;
 198         int mode;
 199
 200         char name[64];
 201         char phys[64];
 202
 203         /* Each mode (AUX1-AUX4 and PC) can have an independent keymap. */
 204         u16 keycode[ATI_REMOTE2_MODES][ARRAY_SIZE(ati_remote2_key_table)];
 205
 206         unsigned int flags;
 207
 208         unsigned int channel_mask;
 209         unsigned int mode_mask;
 210 };
 211
 212 static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id);
 213 static void ati_remote2_disconnect(struct usb_interface *interface);
 214 static int ati_remote2_suspend(struct usb_interface *interface, pm_message_t message);
 215 static int ati_remote2_resume(struct usb_interface *interface);
 216 static int ati_remote2_reset_resume(struct usb_interface *interface);
 217 static int ati_remote2_pre_reset(struct usb_interface *interface);
 218 static int ati_remote2_post_reset(struct usb_interface *interface);
 219
 220 static struct usb_driver ati_remote2_driver = {
 221         .name       = "ati_remote2",
 222         .probe      = ati_remote2_probe,
 223         .disconnect = ati_remote2_disconnect,
 224         .id_table   = ati_remote2_id_table,
 225         .suspend    = ati_remote2_suspend,
 226         .resume     = ati_remote2_resume,
 227         .reset_resume = ati_remote2_reset_resume,
 228         .pre_reset  = ati_remote2_pre_reset,
 229         .post_reset = ati_remote2_post_reset,
 230         .supports_autosuspend = 1,
 231 };
 232
 233 static int ati_remote2_submit_urbs(struct ati_remote2 *ar2)
 234 {
 235         int r;
 236
 237         r = usb_submit_urb(ar2->urb[0], GFP_KERNEL);
 238         if (r) {
 239                 dev_err(&ar2->intf[0]->dev,
 240                         "%s(): usb_submit_urb() = %d\n", __func__, r);
 241                 return r;
 242         }
 243         r = usb_submit_urb(ar2->urb[1], GFP_KERNEL);
 244         if (r) {
 245                 usb_kill_urb(ar2->urb[0]);
 246                 dev_err(&ar2->intf[1]->dev,
 247                         "%s(): usb_submit_urb() = %d\n", __func__, r);
 248                 return r;
 249         }
 250
 251         return 0;
 252 }
 253
 254 static void ati_remote2_kill_urbs(struct ati_remote2 *ar2)
 255 {
 256         usb_kill_urb(ar2->urb[1]);
 257         usb_kill_urb(ar2->urb[0]);
 258 }
 259
 260 static int ati_remote2_open(struct input_dev *idev)
 261 {
 262         struct ati_remote2 *ar2 = input_get_drvdata(idev);
 263         int r;
 264
 265         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 266
 267         r = usb_autopm_get_interface(ar2->intf[0]);
 268         if (r) {
 269                 dev_err(&ar2->intf[0]->dev,
 270                         "%s(): usb_autopm_get_interface() = %d\n", __func__, r);
 271                 goto fail1;
 272         }
 273
 274         mutex_lock(&ati_remote2_mutex);
 275
 276         if (!(ar2->flags & ATI_REMOTE2_SUSPENDED)) {
 277                 r = ati_remote2_submit_urbs(ar2);
 278                 if (r)
 279                         goto fail2;
 280         }
 281
 282         ar2->flags |= ATI_REMOTE2_OPENED;
 283
 284         mutex_unlock(&ati_remote2_mutex);
 285
 286         usb_autopm_put_interface(ar2->intf[0]);
 287
 288         return 0;
 289
 290  fail2:
 291         mutex_unlock(&ati_remote2_mutex);
 292         usb_autopm_put_interface(ar2->intf[0]);
 293  fail1:
 294         return r;
 295 }
 296
 297 static void ati_remote2_close(struct input_dev *idev)
 298 {
 299         struct ati_remote2 *ar2 = input_get_drvdata(idev);
 300
 301         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 302
 303         mutex_lock(&ati_remote2_mutex);
 304
 305         if (!(ar2->flags & ATI_REMOTE2_SUSPENDED))
 306                 ati_remote2_kill_urbs(ar2);
 307
 308         ar2->flags &= ~ATI_REMOTE2_OPENED;
 309
 310         mutex_unlock(&ati_remote2_mutex);
 311 }
 312
 313 static void ati_remote2_input_mouse(struct ati_remote2 *ar2)
 314 {
 315         struct input_dev *idev = ar2->idev;
 316         u8 *data = ar2->buf[0];
 317         int channel, mode;
 318
 319         channel = data[0] >> 4;
 320
 321         if (!((1 << channel) & ar2->channel_mask))
 322                 return;
 323
 324         mode = data[0] & 0x0F;
 325
 326         if (mode > ATI_REMOTE2_PC) {
 327                 dev_err(&ar2->intf[0]->dev,
 328                         "Unknown mode byte (%02x %02x %02x %02x)\n",
 329                         data[3], data[2], data[1], data[0]);
 330                 return;
 331         }
 332
 333         if (!((1 << mode) & ar2->mode_mask))
 334                 return;
 335
 336         input_event(idev, EV_REL, REL_X, (s8) data[1]);
 337         input_event(idev, EV_REL, REL_Y, (s8) data[2]);
 338         input_sync(idev);
 339 }
 340
 341 static int ati_remote2_lookup(unsigned int hw_code)
 342 {
 343         int i;
 344
 345         for (i = 0; i < ARRAY_SIZE(ati_remote2_key_table); i++)
 346                 if (ati_remote2_key_table[i].hw_code == hw_code)
 347                         return i;
 348
 349         return -1;
 350 }
 351
 352 static void ati_remote2_input_key(struct ati_remote2 *ar2)
 353 {
 354         struct input_dev *idev = ar2->idev;
 355         u8 *data = ar2->buf[1];
 356         int channel, mode, hw_code, index;
 357
 358         channel = data[0] >> 4;
 359
 360         if (!((1 << channel) & ar2->channel_mask))
 361                 return;
 362
 363         mode = data[0] & 0x0F;
 364
 365         if (mode > ATI_REMOTE2_PC) {
 366                 dev_err(&ar2->intf[1]->dev,
 367                         "Unknown mode byte (%02x %02x %02x %02x)\n",
 368                         data[3], data[2], data[1], data[0]);
 369                 return;
 370         }
 371
 372         hw_code = data[2];
 373         if (hw_code == 0x3f) {
 374                 /*
 375                  * For some incomprehensible reason the mouse pad generates
 376                  * events which look identical to the events from the last
 377                  * pressed mode key. Naturally we don't want to generate key
 378                  * events for the mouse pad so we filter out any subsequent
 379                  * events from the same mode key.
 380                  */
 381                 if (ar2->mode == mode)
 382                         return;
 383
 384                 if (data[1] == 0)
 385                         ar2->mode = mode;
 386         }
 387
 388         if (!((1 << mode) & ar2->mode_mask))
 389                 return;
 390
 391         index = ati_remote2_lookup(hw_code);
 392         if (index < 0) {
 393                 dev_err(&ar2->intf[1]->dev,
 394                         "Unknown code byte (%02x %02x %02x %02x)\n",
 395                         data[3], data[2], data[1], data[0]);
 396                 return;
 397         }
 398
 399         switch (data[1]) {
 400         case 0: /* release */
 401                 break;
 402         case 1: /* press */
 403                 ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_DELAY]);
 404                 break;
 405         case 2: /* repeat */
 406
 407                 /* No repeat for mouse buttons. */
 408                 if (ar2->keycode[mode][index] == BTN_LEFT ||
 409                     ar2->keycode[mode][index] == BTN_RIGHT)
 410                         return;
 411
 412                 if (!time_after_eq(jiffies, ar2->jiffies))
 413                         return;
 414
 415                 ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_PERIOD]);
 416                 break;
 417         default:
 418                 dev_err(&ar2->intf[1]->dev,
 419                         "Unknown state byte (%02x %02x %02x %02x)\n",
 420                         data[3], data[2], data[1], data[0]);
 421                 return;
 422         }
 423
 424         input_event(idev, EV_KEY, ar2->keycode[mode][index], data[1]);
 425         input_sync(idev);
 426 }
 427
 428 static void ati_remote2_complete_mouse(struct urb *urb)
 429 {
 430         struct ati_remote2 *ar2 = urb->context;
 431         int r;
 432
 433         switch (urb->status) {
 434         case 0:
 435                 usb_mark_last_busy(ar2->udev);
 436                 ati_remote2_input_mouse(ar2);
 437                 break;
 438         case -ENOENT:
 439         case -EILSEQ:
 440         case -ECONNRESET:
 441         case -ESHUTDOWN:
 442                 dev_dbg(&ar2->intf[0]->dev,
 443                         "%s(): urb status = %d\n", __func__, urb->status);
 444                 return;
 445         default:
 446                 usb_mark_last_busy(ar2->udev);
 447                 dev_err(&ar2->intf[0]->dev,
 448                         "%s(): urb status = %d\n", __func__, urb->status);
 449         }
 450
 451         r = usb_submit_urb(urb, GFP_ATOMIC);
 452         if (r)
 453                 dev_err(&ar2->intf[0]->dev,
 454                         "%s(): usb_submit_urb() = %d\n", __func__, r);
 455 }
 456
 457 static void ati_remote2_complete_key(struct urb *urb)
 458 {
 459         struct ati_remote2 *ar2 = urb->context;
 460         int r;
 461
 462         switch (urb->status) {
 463         case 0:
 464                 usb_mark_last_busy(ar2->udev);
 465                 ati_remote2_input_key(ar2);
 466                 break;
 467         case -ENOENT:
 468         case -EILSEQ:
 469         case -ECONNRESET:
 470         case -ESHUTDOWN:
 471                 dev_dbg(&ar2->intf[1]->dev,
 472                         "%s(): urb status = %d\n", __func__, urb->status);
 473                 return;
 474         default:
 475                 usb_mark_last_busy(ar2->udev);
 476                 dev_err(&ar2->intf[1]->dev,
 477                         "%s(): urb status = %d\n", __func__, urb->status);
 478         }
 479
 480         r = usb_submit_urb(urb, GFP_ATOMIC);
 481         if (r)
 482                 dev_err(&ar2->intf[1]->dev,
 483                         "%s(): usb_submit_urb() = %d\n", __func__, r);
 484 }
 485
 486 static int ati_remote2_getkeycode(struct input_dev *idev,
 487                                   struct input_keymap_entry *ke)
 488 {
 489         struct ati_remote2 *ar2 = input_get_drvdata(idev);
 490         unsigned int mode;
 491         int offset;
 492         unsigned int index;
 493         unsigned int scancode;
 494
 495         if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
 496                 index = ke->index;
 497                 if (index >= ATI_REMOTE2_MODES *
 498                                 ARRAY_SIZE(ati_remote2_key_table))
 499                         return -EINVAL;
 500
 501                 mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
 502                 offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
 503                 scancode = (mode << 8) + ati_remote2_key_table[offset].hw_code;
 504         } else {
 505                 if (input_scancode_to_scalar(ke, &scancode))
 506                         return -EINVAL;
 507
 508                 mode = scancode >> 8;
 509                 if (mode > ATI_REMOTE2_PC)
 510                         return -EINVAL;
 511
 512                 offset = ati_remote2_lookup(scancode & 0xff);
 513                 if (offset < 0)
 514                         return -EINVAL;
 515
 516                 index = mode * ARRAY_SIZE(ati_remote2_key_table) + offset;
 517         }
 518
 519         ke->keycode = ar2->keycode[mode][offset];
 520         ke->len = sizeof(scancode);
 521         memcpy(&ke->scancode, &scancode, sizeof(scancode));
 522         ke->index = index;
 523
 524         return 0;
 525 }
 526
 527 static int ati_remote2_setkeycode(struct input_dev *idev,
 528                                   const struct input_keymap_entry *ke,
 529                                   unsigned int *old_keycode)
 530 {
 531         struct ati_remote2 *ar2 = input_get_drvdata(idev);
 532         unsigned int mode;
 533         int offset;
 534         unsigned int index;
 535         unsigned int scancode;
 536
 537         if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
 538                 if (ke->index >= ATI_REMOTE2_MODES *
 539                                 ARRAY_SIZE(ati_remote2_key_table))
 540                         return -EINVAL;
 541
 542                 mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
 543                 offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
 544         } else {
 545                 if (input_scancode_to_scalar(ke, &scancode))
 546                         return -EINVAL;
 547
 548                 mode = scancode >> 8;
 549                 if (mode > ATI_REMOTE2_PC)
 550                         return -EINVAL;
 551
 552                 offset = ati_remote2_lookup(scancode & 0xff);
 553                 if (offset < 0)
 554                         return -EINVAL;
 555         }
 556
 557         *old_keycode = ar2->keycode[mode][offset];
 558         ar2->keycode[mode][offset] = ke->keycode;
 559         __set_bit(ke->keycode, idev->keybit);
 560
 561         for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
 562                 for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
 563                         if (ar2->keycode[mode][index] == *old_keycode)
 564                                 return 0;
 565                 }
 566         }
 567
 568         __clear_bit(*old_keycode, idev->keybit);
 569
 570         return 0;
 571 }
 572
 573 static int ati_remote2_input_init(struct ati_remote2 *ar2)
 574 {
 575         struct input_dev *idev;
 576         int index, mode, retval;
 577
 578         idev = input_allocate_device();
 579         if (!idev)
 580                 return -ENOMEM;
 581
 582         ar2->idev = idev;
 583         input_set_drvdata(idev, ar2);
 584
 585         idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
 586         idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
 587                 BIT_MASK(BTN_RIGHT);
 588         idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 589
 590         for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
 591                 for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
 592                         ar2->keycode[mode][index] = ati_remote2_key_table[index].keycode;
 593                         __set_bit(ar2->keycode[mode][index], idev->keybit);
 594                 }
 595         }
 596
 597         /* AUX1-AUX4 and PC generate the same scancode. */
 598         index = ati_remote2_lookup(0x3f);
 599         ar2->keycode[ATI_REMOTE2_AUX1][index] = KEY_PROG1;
 600         ar2->keycode[ATI_REMOTE2_AUX2][index] = KEY_PROG2;
 601         ar2->keycode[ATI_REMOTE2_AUX3][index] = KEY_PROG3;
 602         ar2->keycode[ATI_REMOTE2_AUX4][index] = KEY_PROG4;
 603         ar2->keycode[ATI_REMOTE2_PC][index] = KEY_PC;
 604         __set_bit(KEY_PROG1, idev->keybit);
 605         __set_bit(KEY_PROG2, idev->keybit);
 606         __set_bit(KEY_PROG3, idev->keybit);
 607         __set_bit(KEY_PROG4, idev->keybit);
 608         __set_bit(KEY_PC, idev->keybit);
 609
 610         idev->rep[REP_DELAY]  = 250;
 611         idev->rep[REP_PERIOD] = 33;
 612
 613         idev->open = ati_remote2_open;
 614         idev->close = ati_remote2_close;
 615
 616         idev->getkeycode = ati_remote2_getkeycode;
 617         idev->setkeycode = ati_remote2_setkeycode;
 618
 619         idev->name = ar2->name;
 620         idev->phys = ar2->phys;
 621
 622         usb_to_input_id(ar2->udev, &idev->id);
 623         idev->dev.parent = &ar2->udev->dev;
 624
 625         retval = input_register_device(idev);
 626         if (retval)
 627                 input_free_device(idev);
 628
 629         return retval;
 630 }
 631
 632 static int ati_remote2_urb_init(struct ati_remote2 *ar2)
 633 {
 634         struct usb_device *udev = ar2->udev;
 635         int i, pipe, maxp;
 636
 637         for (i = 0; i < 2; i++) {
 638                 ar2->buf[i] = usb_alloc_coherent(udev, 4, GFP_KERNEL, &ar2->buf_dma[i]);
 639                 if (!ar2->buf[i])
 640                         return -ENOMEM;
 641
 642                 ar2->urb[i] = usb_alloc_urb(0, GFP_KERNEL);
 643                 if (!ar2->urb[i])
 644                         return -ENOMEM;
 645
 646                 pipe = usb_rcvintpipe(udev, ar2->ep[i]->bEndpointAddress);
 647                 maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 648                 maxp = maxp > 4 ? 4 : maxp;
 649
 650                 usb_fill_int_urb(ar2->urb[i], udev, pipe, ar2->buf[i], maxp,
 651                                  i ? ati_remote2_complete_key : ati_remote2_complete_mouse,
 652                                  ar2, ar2->ep[i]->bInterval);
 653                 ar2->urb[i]->transfer_dma = ar2->buf_dma[i];
 654                 ar2->urb[i]->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 655         }
 656
 657         return 0;
 658 }
 659
 660 static void ati_remote2_urb_cleanup(struct ati_remote2 *ar2)
 661 {
 662         int i;
 663
 664         for (i = 0; i < 2; i++) {
 665                 usb_free_urb(ar2->urb[i]);
 666                 usb_free_coherent(ar2->udev, 4, ar2->buf[i], ar2->buf_dma[i]);
 667         }
 668 }
 669
 670 static int ati_remote2_setup(struct ati_remote2 *ar2, unsigned int ch_mask)
 671 {
 672         int r, i, channel;
 673
 674         /*
 675          * Configure receiver to only accept input from remote "channel"
 676          *  channel == 0  -> Accept input from any remote channel
 677          *  channel == 1  -> Only accept input from remote channel 1
 678          *  channel == 2  -> Only accept input from remote channel 2
 679          *  ...
 680          *  channel == 16 -> Only accept input from remote channel 16
 681          */
 682
 683         channel = 0;
 684         for (i = 0; i < 16; i++) {
 685                 if ((1 << i) & ch_mask) {
 686                         if (!(~(1 << i) & ch_mask))
 687                                 channel = i + 1;
 688                         break;
 689                 }
 690         }
 691
 692         r = usb_control_msg(ar2->udev, usb_sndctrlpipe(ar2->udev, 0),
 693                             0x20,
 694                             USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 695                             channel, 0x0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 696         if (r) {
 697                 dev_err(&ar2->udev->dev, "%s - failed to set channel due to error: %d\n",
 698                         __func__, r);
 699                 return r;
 700         }
 701
 702         return 0;
 703 }
 704
 705 static ssize_t ati_remote2_show_channel_mask(struct device *dev,
 706                                              struct device_attribute *attr,
 707                                              char *buf)
 708 {
 709         struct usb_device *udev = to_usb_device(dev);
 710         struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 711         struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 712
 713         return sprintf(buf, "0x%04x\n", ar2->channel_mask);
 714 }
 715
 716 static ssize_t ati_remote2_store_channel_mask(struct device *dev,
 717                                               struct device_attribute *attr,
 718                                               const char *buf, size_t count)
 719 {
 720         struct usb_device *udev = to_usb_device(dev);
 721         struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 722         struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 723         unsigned int mask;
 724         int r;
 725
 726         r = kstrtouint(buf, 0, &mask);
 727         if (r)
 728                 return r;
 729
 730         if (mask & ~ATI_REMOTE2_MAX_CHANNEL_MASK)
 731                 return -EINVAL;
 732
 733         r = usb_autopm_get_interface(ar2->intf[0]);
 734         if (r) {
 735                 dev_err(&ar2->intf[0]->dev,
 736                         "%s(): usb_autopm_get_interface() = %d\n", __func__, r);
 737                 return r;
 738         }
 739
 740         mutex_lock(&ati_remote2_mutex);
 741
 742         if (mask != ar2->channel_mask) {
 743                 r = ati_remote2_setup(ar2, mask);
 744                 if (!r)
 745                         ar2->channel_mask = mask;
 746         }
 747
 748         mutex_unlock(&ati_remote2_mutex);
 749
 750         usb_autopm_put_interface(ar2->intf[0]);
 751
 752         return r ? r : count;
 753 }
 754
 755 static ssize_t ati_remote2_show_mode_mask(struct device *dev,
 756                                           struct device_attribute *attr,
 757                                           char *buf)
 758 {
 759         struct usb_device *udev = to_usb_device(dev);
 760         struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 761         struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 762
 763         return sprintf(buf, "0x%02x\n", ar2->mode_mask);
 764 }
 765
 766 static ssize_t ati_remote2_store_mode_mask(struct device *dev,
 767                                            struct device_attribute *attr,
 768                                            const char *buf, size_t count)
 769 {
 770         struct usb_device *udev = to_usb_device(dev);
 771         struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 772         struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 773         unsigned int mask;
 774         int err;
 775
 776         err = kstrtouint(buf, 0, &mask);
 777         if (err)
 778                 return err;
 779
 780         if (mask & ~ATI_REMOTE2_MAX_MODE_MASK)
 781                 return -EINVAL;
 782
 783         ar2->mode_mask = mask;
 784
 785         return count;
 786 }
 787
 788 static DEVICE_ATTR(channel_mask, 0644, ati_remote2_show_channel_mask,
 789                    ati_remote2_store_channel_mask);
 790
 791 static DEVICE_ATTR(mode_mask, 0644, ati_remote2_show_mode_mask,
 792                    ati_remote2_store_mode_mask);
 793
 794 static struct attribute *ati_remote2_attrs[] = {
 795         &dev_attr_channel_mask.attr,
 796         &dev_attr_mode_mask.attr,
 797         NULL,
 798 };
 799
 800 static struct attribute_group ati_remote2_attr_group = {
 801         .attrs = ati_remote2_attrs,
 802 };
 803
 804 static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id)
 805 {
 806         struct usb_device *udev = interface_to_usbdev(interface);
 807         struct usb_host_interface *alt = interface->cur_altsetting;
 808         struct ati_remote2 *ar2;
 809         int r;
 810
 811         if (alt->desc.bInterfaceNumber)
 812                 return -ENODEV;
 813
 814         ar2 = kzalloc(sizeof (struct ati_remote2), GFP_KERNEL);
 815         if (!ar2)
 816                 return -ENOMEM;
 817
 818         ar2->udev = udev;
 819
 820         ar2->intf[0] = interface;
 821         ar2->ep[0] = &alt->endpoint[0].desc;
 822
 823         ar2->intf[1] = usb_ifnum_to_if(udev, 1);
 824         r = usb_driver_claim_interface(&ati_remote2_driver, ar2->intf[1], ar2);
 825         if (r)
 826                 goto fail1;
 827         alt = ar2->intf[1]->cur_altsetting;
 828         ar2->ep[1] = &alt->endpoint[0].desc;
 829
 830         r = ati_remote2_urb_init(ar2);
 831         if (r)
 832                 goto fail2;
 833
 834         ar2->channel_mask = channel_mask;
 835         ar2->mode_mask = mode_mask;
 836
 837         r = ati_remote2_setup(ar2, ar2->channel_mask);
 838         if (r)
 839                 goto fail2;
 840
 841         usb_make_path(udev, ar2->phys, sizeof(ar2->phys));
 842         strlcat(ar2->phys, "/input0", sizeof(ar2->phys));
 843
 844         strlcat(ar2->name, "ATI Remote Wonder II", sizeof(ar2->name));
 845
 846         r = sysfs_create_group(&udev->dev.kobj, &ati_remote2_attr_group);
 847         if (r)
 848                 goto fail2;
 849
 850         r = ati_remote2_input_init(ar2);
 851         if (r)
 852                 goto fail3;
 853
 854         usb_set_intfdata(interface, ar2);
 855
 856         interface->needs_remote_wakeup = 1;
 857
 858         return 0;
 859
 860  fail3:
 861         sysfs_remove_group(&udev->dev.kobj, &ati_remote2_attr_group);
 862  fail2:
 863         ati_remote2_urb_cleanup(ar2);
 864         usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
 865  fail1:
 866         kfree(ar2);
 867
 868         return r;
 869 }
 870
 871 static void ati_remote2_disconnect(struct usb_interface *interface)
 872 {
 873         struct ati_remote2 *ar2;
 874         struct usb_host_interface *alt = interface->cur_altsetting;
 875
 876         if (alt->desc.bInterfaceNumber)
 877                 return;
 878
 879         ar2 = usb_get_intfdata(interface);
 880         usb_set_intfdata(interface, NULL);
 881
 882         input_unregister_device(ar2->idev);
 883
 884         sysfs_remove_group(&ar2->udev->dev.kobj, &ati_remote2_attr_group);
 885
 886         ati_remote2_urb_cleanup(ar2);
 887
 888         usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
 889
 890         kfree(ar2);
 891 }
 892
 893 static int ati_remote2_suspend(struct usb_interface *interface,
 894                                pm_message_t message)
 895 {
 896         struct ati_remote2 *ar2;
 897         struct usb_host_interface *alt = interface->cur_altsetting;
 898
 899         if (alt->desc.bInterfaceNumber)
 900                 return 0;
 901
 902         ar2 = usb_get_intfdata(interface);
 903
 904         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 905
 906         mutex_lock(&ati_remote2_mutex);
 907
 908         if (ar2->flags & ATI_REMOTE2_OPENED)
 909                 ati_remote2_kill_urbs(ar2);
 910
 911         ar2->flags |= ATI_REMOTE2_SUSPENDED;
 912
 913         mutex_unlock(&ati_remote2_mutex);
 914
 915         return 0;
 916 }
 917
 918 static int ati_remote2_resume(struct usb_interface *interface)
 919 {
 920         struct ati_remote2 *ar2;
 921         struct usb_host_interface *alt = interface->cur_altsetting;
 922         int r = 0;
 923
 924         if (alt->desc.bInterfaceNumber)
 925                 return 0;
 926
 927         ar2 = usb_get_intfdata(interface);
 928
 929         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 930
 931         mutex_lock(&ati_remote2_mutex);
 932
 933         if (ar2->flags & ATI_REMOTE2_OPENED)
 934                 r = ati_remote2_submit_urbs(ar2);
 935
 936         if (!r)
 937                 ar2->flags &= ~ATI_REMOTE2_SUSPENDED;
 938
 939         mutex_unlock(&ati_remote2_mutex);
 940
 941         return r;
 942 }
 943
 944 static int ati_remote2_reset_resume(struct usb_interface *interface)
 945 {
 946         struct ati_remote2 *ar2;
 947         struct usb_host_interface *alt = interface->cur_altsetting;
 948         int r = 0;
 949
 950         if (alt->desc.bInterfaceNumber)
 951                 return 0;
 952
 953         ar2 = usb_get_intfdata(interface);
 954
 955         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 956
 957         mutex_lock(&ati_remote2_mutex);
 958
 959         r = ati_remote2_setup(ar2, ar2->channel_mask);
 960         if (r)
 961                 goto out;
 962
 963         if (ar2->flags & ATI_REMOTE2_OPENED)
 964                 r = ati_remote2_submit_urbs(ar2);
 965
 966         if (!r)
 967                 ar2->flags &= ~ATI_REMOTE2_SUSPENDED;
 968
 969  out:
 970         mutex_unlock(&ati_remote2_mutex);
 971
 972         return r;
 973 }
 974
 975 static int ati_remote2_pre_reset(struct usb_interface *interface)
 976 {
 977         struct ati_remote2 *ar2;
 978         struct usb_host_interface *alt = interface->cur_altsetting;
 979
 980         if (alt->desc.bInterfaceNumber)
 981                 return 0;
 982
 983         ar2 = usb_get_intfdata(interface);
 984
 985         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 986
 987         mutex_lock(&ati_remote2_mutex);
 988
 989         if (ar2->flags == ATI_REMOTE2_OPENED)
 990                 ati_remote2_kill_urbs(ar2);
 991
 992         return 0;
 993 }
 994
 995 static int ati_remote2_post_reset(struct usb_interface *interface)
 996 {
 997         struct ati_remote2 *ar2;
 998         struct usb_host_interface *alt = interface->cur_altsetting;
 999         int r = 0;
1000
1001         if (alt->desc.bInterfaceNumber)
1002                 return 0;
1003
1004         ar2 = usb_get_intfdata(interface);
1005
1006         dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
1007
1008         if (ar2->flags == ATI_REMOTE2_OPENED)
1009                 r = ati_remote2_submit_urbs(ar2);
1010
1011         mutex_unlock(&ati_remote2_mutex);
1012
1013         return r;
1014 }
1015
1016 module_usb_driver(ati_remote2_driver);