linux/drivers/input/misc/ati_remote2.c
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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 <syrjala@sci.fi>
   6 * Copyright (C) 2007-2008 Peter Stokes <linux@dadeos.co.uk>
   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 <syrjala@sci.fi>");
  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 int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id);
 208static void ati_remote2_disconnect(struct usb_interface *interface);
 209static int ati_remote2_suspend(struct usb_interface *interface, pm_message_t message);
 210static int ati_remote2_resume(struct usb_interface *interface);
 211static int ati_remote2_reset_resume(struct usb_interface *interface);
 212static int ati_remote2_pre_reset(struct usb_interface *interface);
 213static int ati_remote2_post_reset(struct usb_interface *interface);
 214
 215static struct usb_driver ati_remote2_driver = {
 216        .name       = "ati_remote2",
 217        .probe      = ati_remote2_probe,
 218        .disconnect = ati_remote2_disconnect,
 219        .id_table   = ati_remote2_id_table,
 220        .suspend    = ati_remote2_suspend,
 221        .resume     = ati_remote2_resume,
 222        .reset_resume = ati_remote2_reset_resume,
 223        .pre_reset  = ati_remote2_pre_reset,
 224        .post_reset = ati_remote2_post_reset,
 225        .supports_autosuspend = 1,
 226};
 227
 228static int ati_remote2_submit_urbs(struct ati_remote2 *ar2)
 229{
 230        int r;
 231
 232        r = usb_submit_urb(ar2->urb[0], GFP_KERNEL);
 233        if (r) {
 234                dev_err(&ar2->intf[0]->dev,
 235                        "%s(): usb_submit_urb() = %d\n", __func__, r);
 236                return r;
 237        }
 238        r = usb_submit_urb(ar2->urb[1], GFP_KERNEL);
 239        if (r) {
 240                usb_kill_urb(ar2->urb[0]);
 241                dev_err(&ar2->intf[1]->dev,
 242                        "%s(): usb_submit_urb() = %d\n", __func__, r);
 243                return r;
 244        }
 245
 246        return 0;
 247}
 248
 249static void ati_remote2_kill_urbs(struct ati_remote2 *ar2)
 250{
 251        usb_kill_urb(ar2->urb[1]);
 252        usb_kill_urb(ar2->urb[0]);
 253}
 254
 255static int ati_remote2_open(struct input_dev *idev)
 256{
 257        struct ati_remote2 *ar2 = input_get_drvdata(idev);
 258        int r;
 259
 260        dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 261
 262        r = usb_autopm_get_interface(ar2->intf[0]);
 263        if (r) {
 264                dev_err(&ar2->intf[0]->dev,
 265                        "%s(): usb_autopm_get_interface() = %d\n", __func__, r);
 266                goto fail1;
 267        }
 268
 269        mutex_lock(&ati_remote2_mutex);
 270
 271        if (!(ar2->flags & ATI_REMOTE2_SUSPENDED)) {
 272                r = ati_remote2_submit_urbs(ar2);
 273                if (r)
 274                        goto fail2;
 275        }
 276
 277        ar2->flags |= ATI_REMOTE2_OPENED;
 278
 279        mutex_unlock(&ati_remote2_mutex);
 280
 281        usb_autopm_put_interface(ar2->intf[0]);
 282
 283        return 0;
 284
 285 fail2:
 286        mutex_unlock(&ati_remote2_mutex);
 287        usb_autopm_put_interface(ar2->intf[0]);
 288 fail1:
 289        return r;
 290}
 291
 292static void ati_remote2_close(struct input_dev *idev)
 293{
 294        struct ati_remote2 *ar2 = input_get_drvdata(idev);
 295
 296        dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 297
 298        mutex_lock(&ati_remote2_mutex);
 299
 300        if (!(ar2->flags & ATI_REMOTE2_SUSPENDED))
 301                ati_remote2_kill_urbs(ar2);
 302
 303        ar2->flags &= ~ATI_REMOTE2_OPENED;
 304
 305        mutex_unlock(&ati_remote2_mutex);
 306}
 307
 308static void ati_remote2_input_mouse(struct ati_remote2 *ar2)
 309{
 310        struct input_dev *idev = ar2->idev;
 311        u8 *data = ar2->buf[0];
 312        int channel, mode;
 313
 314        channel = data[0] >> 4;
 315
 316        if (!((1 << channel) & ar2->channel_mask))
 317                return;
 318
 319        mode = data[0] & 0x0F;
 320
 321        if (mode > ATI_REMOTE2_PC) {
 322                dev_err(&ar2->intf[0]->dev,
 323                        "Unknown mode byte (%02x %02x %02x %02x)\n",
 324                        data[3], data[2], data[1], data[0]);
 325                return;
 326        }
 327
 328        if (!((1 << mode) & ar2->mode_mask))
 329                return;
 330
 331        input_event(idev, EV_REL, REL_X, (s8) data[1]);
 332        input_event(idev, EV_REL, REL_Y, (s8) data[2]);
 333        input_sync(idev);
 334}
 335
 336static int ati_remote2_lookup(unsigned int hw_code)
 337{
 338        int i;
 339
 340        for (i = 0; i < ARRAY_SIZE(ati_remote2_key_table); i++)
 341                if (ati_remote2_key_table[i].hw_code == hw_code)
 342                        return i;
 343
 344        return -1;
 345}
 346
 347static void ati_remote2_input_key(struct ati_remote2 *ar2)
 348{
 349        struct input_dev *idev = ar2->idev;
 350        u8 *data = ar2->buf[1];
 351        int channel, mode, hw_code, index;
 352
 353        channel = data[0] >> 4;
 354
 355        if (!((1 << channel) & ar2->channel_mask))
 356                return;
 357
 358        mode = data[0] & 0x0F;
 359
 360        if (mode > ATI_REMOTE2_PC) {
 361                dev_err(&ar2->intf[1]->dev,
 362                        "Unknown mode byte (%02x %02x %02x %02x)\n",
 363                        data[3], data[2], data[1], data[0]);
 364                return;
 365        }
 366
 367        hw_code = data[2];
 368        if (hw_code == 0x3f) {
 369                /*
 370                 * For some incomprehensible reason the mouse pad generates
 371                 * events which look identical to the events from the last
 372                 * pressed mode key. Naturally we don't want to generate key
 373                 * events for the mouse pad so we filter out any subsequent
 374                 * events from the same mode key.
 375                 */
 376                if (ar2->mode == mode)
 377                        return;
 378
 379                if (data[1] == 0)
 380                        ar2->mode = mode;
 381        }
 382
 383        if (!((1 << mode) & ar2->mode_mask))
 384                return;
 385
 386        index = ati_remote2_lookup(hw_code);
 387        if (index < 0) {
 388                dev_err(&ar2->intf[1]->dev,
 389                        "Unknown code byte (%02x %02x %02x %02x)\n",
 390                        data[3], data[2], data[1], data[0]);
 391                return;
 392        }
 393
 394        switch (data[1]) {
 395        case 0: /* release */
 396                break;
 397        case 1: /* press */
 398                ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_DELAY]);
 399                break;
 400        case 2: /* repeat */
 401
 402                /* No repeat for mouse buttons. */
 403                if (ar2->keycode[mode][index] == BTN_LEFT ||
 404                    ar2->keycode[mode][index] == BTN_RIGHT)
 405                        return;
 406
 407                if (!time_after_eq(jiffies, ar2->jiffies))
 408                        return;
 409
 410                ar2->jiffies = jiffies + msecs_to_jiffies(idev->rep[REP_PERIOD]);
 411                break;
 412        default:
 413                dev_err(&ar2->intf[1]->dev,
 414                        "Unknown state byte (%02x %02x %02x %02x)\n",
 415                        data[3], data[2], data[1], data[0]);
 416                return;
 417        }
 418
 419        input_event(idev, EV_KEY, ar2->keycode[mode][index], data[1]);
 420        input_sync(idev);
 421}
 422
 423static void ati_remote2_complete_mouse(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_mouse(ar2);
 432                break;
 433        case -ENOENT:
 434        case -EILSEQ:
 435        case -ECONNRESET:
 436        case -ESHUTDOWN:
 437                dev_dbg(&ar2->intf[0]->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[0]->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[0]->dev,
 449                        "%s(): usb_submit_urb() = %d\n", __func__, r);
 450}
 451
 452static void ati_remote2_complete_key(struct urb *urb)
 453{
 454        struct ati_remote2 *ar2 = urb->context;
 455        int r;
 456
 457        switch (urb->status) {
 458        case 0:
 459                usb_mark_last_busy(ar2->udev);
 460                ati_remote2_input_key(ar2);
 461                break;
 462        case -ENOENT:
 463        case -EILSEQ:
 464        case -ECONNRESET:
 465        case -ESHUTDOWN:
 466                dev_dbg(&ar2->intf[1]->dev,
 467                        "%s(): urb status = %d\n", __func__, urb->status);
 468                return;
 469        default:
 470                usb_mark_last_busy(ar2->udev);
 471                dev_err(&ar2->intf[1]->dev,
 472                        "%s(): urb status = %d\n", __func__, urb->status);
 473        }
 474
 475        r = usb_submit_urb(urb, GFP_ATOMIC);
 476        if (r)
 477                dev_err(&ar2->intf[1]->dev,
 478                        "%s(): usb_submit_urb() = %d\n", __func__, r);
 479}
 480
 481static int ati_remote2_getkeycode(struct input_dev *idev,
 482                                  struct input_keymap_entry *ke)
 483{
 484        struct ati_remote2 *ar2 = input_get_drvdata(idev);
 485        unsigned int mode;
 486        int offset;
 487        unsigned int index;
 488        unsigned int scancode;
 489
 490        if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
 491                index = ke->index;
 492                if (index >= ATI_REMOTE2_MODES *
 493                                ARRAY_SIZE(ati_remote2_key_table))
 494                        return -EINVAL;
 495
 496                mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
 497                offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
 498                scancode = (mode << 8) + ati_remote2_key_table[offset].hw_code;
 499        } else {
 500                if (input_scancode_to_scalar(ke, &scancode))
 501                        return -EINVAL;
 502
 503                mode = scancode >> 8;
 504                if (mode > ATI_REMOTE2_PC)
 505                        return -EINVAL;
 506
 507                offset = ati_remote2_lookup(scancode & 0xff);
 508                if (offset < 0)
 509                        return -EINVAL;
 510
 511                index = mode * ARRAY_SIZE(ati_remote2_key_table) + offset;
 512        }
 513
 514        ke->keycode = ar2->keycode[mode][offset];
 515        ke->len = sizeof(scancode);
 516        memcpy(&ke->scancode, &scancode, sizeof(scancode));
 517        ke->index = index;
 518
 519        return 0;
 520}
 521
 522static int ati_remote2_setkeycode(struct input_dev *idev,
 523                                  const struct input_keymap_entry *ke,
 524                                  unsigned int *old_keycode)
 525{
 526        struct ati_remote2 *ar2 = input_get_drvdata(idev);
 527        unsigned int mode;
 528        int offset;
 529        unsigned int index;
 530        unsigned int scancode;
 531
 532        if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
 533                if (ke->index >= ATI_REMOTE2_MODES *
 534                                ARRAY_SIZE(ati_remote2_key_table))
 535                        return -EINVAL;
 536
 537                mode = ke->index / ARRAY_SIZE(ati_remote2_key_table);
 538                offset = ke->index % ARRAY_SIZE(ati_remote2_key_table);
 539        } else {
 540                if (input_scancode_to_scalar(ke, &scancode))
 541                        return -EINVAL;
 542
 543                mode = scancode >> 8;
 544                if (mode > ATI_REMOTE2_PC)
 545                        return -EINVAL;
 546
 547                offset = ati_remote2_lookup(scancode & 0xff);
 548                if (offset < 0)
 549                        return -EINVAL;
 550        }
 551
 552        *old_keycode = ar2->keycode[mode][offset];
 553        ar2->keycode[mode][offset] = ke->keycode;
 554        __set_bit(ke->keycode, idev->keybit);
 555
 556        for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
 557                for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
 558                        if (ar2->keycode[mode][index] == *old_keycode)
 559                                return 0;
 560                }
 561        }
 562
 563        __clear_bit(*old_keycode, idev->keybit);
 564
 565        return 0;
 566}
 567
 568static int ati_remote2_input_init(struct ati_remote2 *ar2)
 569{
 570        struct input_dev *idev;
 571        int index, mode, retval;
 572
 573        idev = input_allocate_device();
 574        if (!idev)
 575                return -ENOMEM;
 576
 577        ar2->idev = idev;
 578        input_set_drvdata(idev, ar2);
 579
 580        idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
 581        idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
 582                BIT_MASK(BTN_RIGHT);
 583        idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 584
 585        for (mode = 0; mode < ATI_REMOTE2_MODES; mode++) {
 586                for (index = 0; index < ARRAY_SIZE(ati_remote2_key_table); index++) {
 587                        ar2->keycode[mode][index] = ati_remote2_key_table[index].keycode;
 588                        __set_bit(ar2->keycode[mode][index], idev->keybit);
 589                }
 590        }
 591
 592        /* AUX1-AUX4 and PC generate the same scancode. */
 593        index = ati_remote2_lookup(0x3f);
 594        ar2->keycode[ATI_REMOTE2_AUX1][index] = KEY_PROG1;
 595        ar2->keycode[ATI_REMOTE2_AUX2][index] = KEY_PROG2;
 596        ar2->keycode[ATI_REMOTE2_AUX3][index] = KEY_PROG3;
 597        ar2->keycode[ATI_REMOTE2_AUX4][index] = KEY_PROG4;
 598        ar2->keycode[ATI_REMOTE2_PC][index] = KEY_PC;
 599        __set_bit(KEY_PROG1, idev->keybit);
 600        __set_bit(KEY_PROG2, idev->keybit);
 601        __set_bit(KEY_PROG3, idev->keybit);
 602        __set_bit(KEY_PROG4, idev->keybit);
 603        __set_bit(KEY_PC, idev->keybit);
 604
 605        idev->rep[REP_DELAY]  = 250;
 606        idev->rep[REP_PERIOD] = 33;
 607
 608        idev->open = ati_remote2_open;
 609        idev->close = ati_remote2_close;
 610
 611        idev->getkeycode = ati_remote2_getkeycode;
 612        idev->setkeycode = ati_remote2_setkeycode;
 613
 614        idev->name = ar2->name;
 615        idev->phys = ar2->phys;
 616
 617        usb_to_input_id(ar2->udev, &idev->id);
 618        idev->dev.parent = &ar2->udev->dev;
 619
 620        retval = input_register_device(idev);
 621        if (retval)
 622                input_free_device(idev);
 623
 624        return retval;
 625}
 626
 627static int ati_remote2_urb_init(struct ati_remote2 *ar2)
 628{
 629        struct usb_device *udev = ar2->udev;
 630        int i, pipe, maxp;
 631
 632        for (i = 0; i < 2; i++) {
 633                ar2->buf[i] = usb_alloc_coherent(udev, 4, GFP_KERNEL, &ar2->buf_dma[i]);
 634                if (!ar2->buf[i])
 635                        return -ENOMEM;
 636
 637                ar2->urb[i] = usb_alloc_urb(0, GFP_KERNEL);
 638                if (!ar2->urb[i])
 639                        return -ENOMEM;
 640
 641                pipe = usb_rcvintpipe(udev, ar2->ep[i]->bEndpointAddress);
 642                maxp = usb_maxpacket(udev, pipe);
 643                maxp = maxp > 4 ? 4 : maxp;
 644
 645                usb_fill_int_urb(ar2->urb[i], udev, pipe, ar2->buf[i], maxp,
 646                                 i ? ati_remote2_complete_key : ati_remote2_complete_mouse,
 647                                 ar2, ar2->ep[i]->bInterval);
 648                ar2->urb[i]->transfer_dma = ar2->buf_dma[i];
 649                ar2->urb[i]->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 650        }
 651
 652        return 0;
 653}
 654
 655static void ati_remote2_urb_cleanup(struct ati_remote2 *ar2)
 656{
 657        int i;
 658
 659        for (i = 0; i < 2; i++) {
 660                usb_free_urb(ar2->urb[i]);
 661                usb_free_coherent(ar2->udev, 4, ar2->buf[i], ar2->buf_dma[i]);
 662        }
 663}
 664
 665static int ati_remote2_setup(struct ati_remote2 *ar2, unsigned int ch_mask)
 666{
 667        int r, i, channel;
 668
 669        /*
 670         * Configure receiver to only accept input from remote "channel"
 671         *  channel == 0  -> Accept input from any remote channel
 672         *  channel == 1  -> Only accept input from remote channel 1
 673         *  channel == 2  -> Only accept input from remote channel 2
 674         *  ...
 675         *  channel == 16 -> Only accept input from remote channel 16
 676         */
 677
 678        channel = 0;
 679        for (i = 0; i < 16; i++) {
 680                if ((1 << i) & ch_mask) {
 681                        if (!(~(1 << i) & ch_mask))
 682                                channel = i + 1;
 683                        break;
 684                }
 685        }
 686
 687        r = usb_control_msg(ar2->udev, usb_sndctrlpipe(ar2->udev, 0),
 688                            0x20,
 689                            USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
 690                            channel, 0x0, NULL, 0, USB_CTRL_SET_TIMEOUT);
 691        if (r) {
 692                dev_err(&ar2->udev->dev, "%s - failed to set channel due to error: %d\n",
 693                        __func__, r);
 694                return r;
 695        }
 696
 697        return 0;
 698}
 699
 700static ssize_t ati_remote2_show_channel_mask(struct device *dev,
 701                                             struct device_attribute *attr,
 702                                             char *buf)
 703{
 704        struct usb_device *udev = to_usb_device(dev);
 705        struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 706        struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 707
 708        return sprintf(buf, "0x%04x\n", ar2->channel_mask);
 709}
 710
 711static ssize_t ati_remote2_store_channel_mask(struct device *dev,
 712                                              struct device_attribute *attr,
 713                                              const char *buf, size_t count)
 714{
 715        struct usb_device *udev = to_usb_device(dev);
 716        struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 717        struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 718        unsigned int mask;
 719        int r;
 720
 721        r = kstrtouint(buf, 0, &mask);
 722        if (r)
 723                return r;
 724
 725        if (mask & ~ATI_REMOTE2_MAX_CHANNEL_MASK)
 726                return -EINVAL;
 727
 728        r = usb_autopm_get_interface(ar2->intf[0]);
 729        if (r) {
 730                dev_err(&ar2->intf[0]->dev,
 731                        "%s(): usb_autopm_get_interface() = %d\n", __func__, r);
 732                return r;
 733        }
 734
 735        mutex_lock(&ati_remote2_mutex);
 736
 737        if (mask != ar2->channel_mask) {
 738                r = ati_remote2_setup(ar2, mask);
 739                if (!r)
 740                        ar2->channel_mask = mask;
 741        }
 742
 743        mutex_unlock(&ati_remote2_mutex);
 744
 745        usb_autopm_put_interface(ar2->intf[0]);
 746
 747        return r ? r : count;
 748}
 749
 750static ssize_t ati_remote2_show_mode_mask(struct device *dev,
 751                                          struct device_attribute *attr,
 752                                          char *buf)
 753{
 754        struct usb_device *udev = to_usb_device(dev);
 755        struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 756        struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 757
 758        return sprintf(buf, "0x%02x\n", ar2->mode_mask);
 759}
 760
 761static ssize_t ati_remote2_store_mode_mask(struct device *dev,
 762                                           struct device_attribute *attr,
 763                                           const char *buf, size_t count)
 764{
 765        struct usb_device *udev = to_usb_device(dev);
 766        struct usb_interface *intf = usb_ifnum_to_if(udev, 0);
 767        struct ati_remote2 *ar2 = usb_get_intfdata(intf);
 768        unsigned int mask;
 769        int err;
 770
 771        err = kstrtouint(buf, 0, &mask);
 772        if (err)
 773                return err;
 774
 775        if (mask & ~ATI_REMOTE2_MAX_MODE_MASK)
 776                return -EINVAL;
 777
 778        ar2->mode_mask = mask;
 779
 780        return count;
 781}
 782
 783static DEVICE_ATTR(channel_mask, 0644, ati_remote2_show_channel_mask,
 784                   ati_remote2_store_channel_mask);
 785
 786static DEVICE_ATTR(mode_mask, 0644, ati_remote2_show_mode_mask,
 787                   ati_remote2_store_mode_mask);
 788
 789static struct attribute *ati_remote2_attrs[] = {
 790        &dev_attr_channel_mask.attr,
 791        &dev_attr_mode_mask.attr,
 792        NULL,
 793};
 794
 795static struct attribute_group ati_remote2_attr_group = {
 796        .attrs = ati_remote2_attrs,
 797};
 798
 799static int ati_remote2_probe(struct usb_interface *interface, const struct usb_device_id *id)
 800{
 801        struct usb_device *udev = interface_to_usbdev(interface);
 802        struct usb_host_interface *alt = interface->cur_altsetting;
 803        struct ati_remote2 *ar2;
 804        int r;
 805
 806        if (alt->desc.bInterfaceNumber)
 807                return -ENODEV;
 808
 809        ar2 = kzalloc(sizeof (struct ati_remote2), GFP_KERNEL);
 810        if (!ar2)
 811                return -ENOMEM;
 812
 813        ar2->udev = udev;
 814
 815        /* Sanity check, first interface must have an endpoint */
 816        if (alt->desc.bNumEndpoints < 1 || !alt->endpoint) {
 817                dev_err(&interface->dev,
 818                        "%s(): interface 0 must have an endpoint\n", __func__);
 819                r = -ENODEV;
 820                goto fail1;
 821        }
 822        ar2->intf[0] = interface;
 823        ar2->ep[0] = &alt->endpoint[0].desc;
 824
 825        /* Sanity check, the device must have two interfaces */
 826        ar2->intf[1] = usb_ifnum_to_if(udev, 1);
 827        if ((udev->actconfig->desc.bNumInterfaces < 2) || !ar2->intf[1]) {
 828                dev_err(&interface->dev, "%s(): need 2 interfaces, found %d\n",
 829                        __func__, udev->actconfig->desc.bNumInterfaces);
 830                r = -ENODEV;
 831                goto fail1;
 832        }
 833
 834        r = usb_driver_claim_interface(&ati_remote2_driver, ar2->intf[1], ar2);
 835        if (r)
 836                goto fail1;
 837
 838        /* Sanity check, second interface must have an endpoint */
 839        alt = ar2->intf[1]->cur_altsetting;
 840        if (alt->desc.bNumEndpoints < 1 || !alt->endpoint) {
 841                dev_err(&interface->dev,
 842                        "%s(): interface 1 must have an endpoint\n", __func__);
 843                r = -ENODEV;
 844                goto fail2;
 845        }
 846        ar2->ep[1] = &alt->endpoint[0].desc;
 847
 848        r = ati_remote2_urb_init(ar2);
 849        if (r)
 850                goto fail3;
 851
 852        ar2->channel_mask = channel_mask;
 853        ar2->mode_mask = mode_mask;
 854
 855        r = ati_remote2_setup(ar2, ar2->channel_mask);
 856        if (r)
 857                goto fail3;
 858
 859        usb_make_path(udev, ar2->phys, sizeof(ar2->phys));
 860        strlcat(ar2->phys, "/input0", sizeof(ar2->phys));
 861
 862        strlcat(ar2->name, "ATI Remote Wonder II", sizeof(ar2->name));
 863
 864        r = sysfs_create_group(&udev->dev.kobj, &ati_remote2_attr_group);
 865        if (r)
 866                goto fail3;
 867
 868        r = ati_remote2_input_init(ar2);
 869        if (r)
 870                goto fail4;
 871
 872        usb_set_intfdata(interface, ar2);
 873
 874        interface->needs_remote_wakeup = 1;
 875
 876        return 0;
 877
 878 fail4:
 879        sysfs_remove_group(&udev->dev.kobj, &ati_remote2_attr_group);
 880 fail3:
 881        ati_remote2_urb_cleanup(ar2);
 882 fail2:
 883        usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
 884 fail1:
 885        kfree(ar2);
 886
 887        return r;
 888}
 889
 890static void ati_remote2_disconnect(struct usb_interface *interface)
 891{
 892        struct ati_remote2 *ar2;
 893        struct usb_host_interface *alt = interface->cur_altsetting;
 894
 895        if (alt->desc.bInterfaceNumber)
 896                return;
 897
 898        ar2 = usb_get_intfdata(interface);
 899        usb_set_intfdata(interface, NULL);
 900
 901        input_unregister_device(ar2->idev);
 902
 903        sysfs_remove_group(&ar2->udev->dev.kobj, &ati_remote2_attr_group);
 904
 905        ati_remote2_urb_cleanup(ar2);
 906
 907        usb_driver_release_interface(&ati_remote2_driver, ar2->intf[1]);
 908
 909        kfree(ar2);
 910}
 911
 912static int ati_remote2_suspend(struct usb_interface *interface,
 913                               pm_message_t message)
 914{
 915        struct ati_remote2 *ar2;
 916        struct usb_host_interface *alt = interface->cur_altsetting;
 917
 918        if (alt->desc.bInterfaceNumber)
 919                return 0;
 920
 921        ar2 = usb_get_intfdata(interface);
 922
 923        dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 924
 925        mutex_lock(&ati_remote2_mutex);
 926
 927        if (ar2->flags & ATI_REMOTE2_OPENED)
 928                ati_remote2_kill_urbs(ar2);
 929
 930        ar2->flags |= ATI_REMOTE2_SUSPENDED;
 931
 932        mutex_unlock(&ati_remote2_mutex);
 933
 934        return 0;
 935}
 936
 937static int ati_remote2_resume(struct usb_interface *interface)
 938{
 939        struct ati_remote2 *ar2;
 940        struct usb_host_interface *alt = interface->cur_altsetting;
 941        int r = 0;
 942
 943        if (alt->desc.bInterfaceNumber)
 944                return 0;
 945
 946        ar2 = usb_get_intfdata(interface);
 947
 948        dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 949
 950        mutex_lock(&ati_remote2_mutex);
 951
 952        if (ar2->flags & ATI_REMOTE2_OPENED)
 953                r = ati_remote2_submit_urbs(ar2);
 954
 955        if (!r)
 956                ar2->flags &= ~ATI_REMOTE2_SUSPENDED;
 957
 958        mutex_unlock(&ati_remote2_mutex);
 959
 960        return r;
 961}
 962
 963static int ati_remote2_reset_resume(struct usb_interface *interface)
 964{
 965        struct ati_remote2 *ar2;
 966        struct usb_host_interface *alt = interface->cur_altsetting;
 967        int r = 0;
 968
 969        if (alt->desc.bInterfaceNumber)
 970                return 0;
 971
 972        ar2 = usb_get_intfdata(interface);
 973
 974        dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
 975
 976        mutex_lock(&ati_remote2_mutex);
 977
 978        r = ati_remote2_setup(ar2, ar2->channel_mask);
 979        if (r)
 980                goto out;
 981
 982        if (ar2->flags & ATI_REMOTE2_OPENED)
 983                r = ati_remote2_submit_urbs(ar2);
 984
 985        if (!r)
 986                ar2->flags &= ~ATI_REMOTE2_SUSPENDED;
 987
 988 out:
 989        mutex_unlock(&ati_remote2_mutex);
 990
 991        return r;
 992}
 993
 994static int ati_remote2_pre_reset(struct usb_interface *interface)
 995{
 996        struct ati_remote2 *ar2;
 997        struct usb_host_interface *alt = interface->cur_altsetting;
 998
 999        if (alt->desc.bInterfaceNumber)
1000                return 0;
1001
1002        ar2 = usb_get_intfdata(interface);
1003
1004        dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
1005
1006        mutex_lock(&ati_remote2_mutex);
1007
1008        if (ar2->flags == ATI_REMOTE2_OPENED)
1009                ati_remote2_kill_urbs(ar2);
1010
1011        return 0;
1012}
1013
1014static int ati_remote2_post_reset(struct usb_interface *interface)
1015{
1016        struct ati_remote2 *ar2;
1017        struct usb_host_interface *alt = interface->cur_altsetting;
1018        int r = 0;
1019
1020        if (alt->desc.bInterfaceNumber)
1021                return 0;
1022
1023        ar2 = usb_get_intfdata(interface);
1024
1025        dev_dbg(&ar2->intf[0]->dev, "%s()\n", __func__);
1026
1027        if (ar2->flags == ATI_REMOTE2_OPENED)
1028                r = ati_remote2_submit_urbs(ar2);
1029
1030        mutex_unlock(&ati_remote2_mutex);
1031
1032        return r;
1033}
1034
1035module_usb_driver(ati_remote2_driver);
1036