drivers/media/rc/ati_remote.c

   1 /*
   2  *  USB ATI Remote support
   3  *
   4  *                Copyright (c) 2011, 2012 Anssi Hannula <anssi.hannula@iki.fi>
   5  *  Version 2.2.0 Copyright (c) 2004 Torrey Hoffman <thoffman@arnor.net>
   6  *  Version 2.1.1 Copyright (c) 2002 Vladimir Dergachev
   7  *
   8  *  This 2.2.0 version is a rewrite / cleanup of the 2.1.1 driver, including
   9  *  porting to the 2.6 kernel interfaces, along with other modification
  10  *  to better match the style of the existing usb/input drivers.  However, the
  11  *  protocol and hardware handling is essentially unchanged from 2.1.1.
  12  *
  13  *  The 2.1.1 driver was derived from the usbati_remote and usbkbd drivers by
  14  *  Vojtech Pavlik.
  15  *
  16  *  Changes:
  17  *
  18  *  Feb 2004: Torrey Hoffman <thoffman@arnor.net>
  19  *            Version 2.2.0
  20  *  Jun 2004: Torrey Hoffman <thoffman@arnor.net>
  21  *            Version 2.2.1
  22  *            Added key repeat support contributed by:
  23  *                Vincent Vanackere <vanackere@lif.univ-mrs.fr>
  24  *            Added support for the "Lola" remote contributed by:
  25  *                Seth Cohn <sethcohn@yahoo.com>
  26  *
  27  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  28  *
  29  * This program is free software; you can redistribute it and/or modify
  30  * it under the terms of the GNU General Public License as published by
  31  * the Free Software Foundation; either version 2 of the License, or
  32  * (at your option) any later version.
  33  *
  34  * This program is distributed in the hope that it will be useful,
  35  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  36  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  37  * GNU General Public License for more details.
  38  *
  39  * You should have received a copy of the GNU General Public License
  40  * along with this program; if not, write to the Free Software
  41  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  42  *
  43  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  44  *
  45  * Hardware & software notes
  46  *
  47  * These remote controls are distributed by ATI as part of their
  48  * "All-In-Wonder" video card packages.  The receiver self-identifies as a
  49  * "USB Receiver" with manufacturer "X10 Wireless Technology Inc".
  50  *
  51  * The "Lola" remote is available from X10.  See:
  52  *    http://www.x10.com/products/lola_sg1.htm
  53  * The Lola is similar to the ATI remote but has no mouse support, and slightly
  54  * different keys.
  55  *
  56  * It is possible to use multiple receivers and remotes on multiple computers
  57  * simultaneously by configuring them to use specific channels.
  58  *
  59  * The RF protocol used by the remote supports 16 distinct channels, 1 to 16.
  60  * Actually, it may even support more, at least in some revisions of the
  61  * hardware.
  62  *
  63  * Each remote can be configured to transmit on one channel as follows:
  64  *   - Press and hold the "hand icon" button.
  65  *   - When the red LED starts to blink, let go of the "hand icon" button.
  66  *   - When it stops blinking, input the channel code as two digits, from 01
  67  *     to 16, and press the hand icon again.
  68  *
  69  * The timing can be a little tricky.  Try loading the module with debug=1
  70  * to have the kernel print out messages about the remote control number
  71  * and mask.  Note: debugging prints remote numbers as zero-based hexadecimal.
  72  *
  73  * The driver has a "channel_mask" parameter. This bitmask specifies which
  74  * channels will be ignored by the module.  To mask out channels, just add
  75  * all the 2^channel_number values together.
  76  *
  77  * For instance, set channel_mask = 2^4 = 16 (binary 10000) to make ati_remote
  78  * ignore signals coming from remote controls transmitting on channel 4, but
  79  * accept all other channels.
  80  *
  81  * Or, set channel_mask = 65533, (0xFFFD), and all channels except 1 will be
  82  * ignored.
  83  *
  84  * The default is 0 (respond to all channels). Bit 0 and bits 17-32 of this
  85  * parameter are unused.
  86  *
  87  */
  88
  89 #include <linux/kernel.h>
  90 #include <linux/errno.h>
  91 #include <linux/init.h>
  92 #include <linux/slab.h>
  93 #include <linux/module.h>
  94 #include <linux/mutex.h>
  95 #include <linux/usb/input.h>
  96 #include <linux/wait.h>
  97 #include <linux/jiffies.h>
  98 #include <media/rc-core.h>
  99
 100 /*
 101  * Module and Version Information, Module Parameters
 102  */
 103
 104 #define ATI_REMOTE_VENDOR_ID            0x0bc7
 105 #define LOLA_REMOTE_PRODUCT_ID          0x0002
 106 #define LOLA2_REMOTE_PRODUCT_ID         0x0003
 107 #define ATI_REMOTE_PRODUCT_ID           0x0004
 108 #define NVIDIA_REMOTE_PRODUCT_ID        0x0005
 109 #define MEDION_REMOTE_PRODUCT_ID        0x0006
 110 #define FIREFLY_REMOTE_PRODUCT_ID       0x0008
 111
 112 #define DRIVER_VERSION          "2.2.1"
 113 #define DRIVER_AUTHOR           "Torrey Hoffman <thoffman@arnor.net>"
 114 #define DRIVER_DESC             "ATI/X10 RF USB Remote Control"
 115
 116 #define NAME_BUFSIZE      80    /* size of product name, path buffers */
 117 #define DATA_BUFSIZE      63    /* size of URB data buffers */
 118
 119 /*
 120  * Duplicate event filtering time.
 121  * Sequential, identical KIND_FILTERED inputs with less than
 122  * FILTER_TIME milliseconds between them are considered as repeat
 123  * events. The hardware generates 5 events for the first keypress
 124  * and we have to take this into account for an accurate repeat
 125  * behaviour.
 126  */
 127 #define FILTER_TIME     60 /* msec */
 128 #define REPEAT_DELAY    500 /* msec */
 129
 130 static unsigned long channel_mask;
 131 module_param(channel_mask, ulong, 0644);
 132 MODULE_PARM_DESC(channel_mask, "Bitmask of remote control channels to ignore");
 133
 134 static int debug;
 135 module_param(debug, int, 0644);
 136 MODULE_PARM_DESC(debug, "Enable extra debug messages and information");
 137
 138 static int repeat_filter = FILTER_TIME;
 139 module_param(repeat_filter, int, 0644);
 140 MODULE_PARM_DESC(repeat_filter, "Repeat filter time, default = 60 msec");
 141
 142 static int repeat_delay = REPEAT_DELAY;
 143 module_param(repeat_delay, int, 0644);
 144 MODULE_PARM_DESC(repeat_delay, "Delay before sending repeats, default = 500 msec");
 145
 146 static bool mouse = true;
 147 module_param(mouse, bool, 0444);
 148 MODULE_PARM_DESC(mouse, "Enable mouse device, default = yes");
 149
 150 #define dbginfo(dev, format, arg...) \
 151         do { if (debug) dev_info(dev , format , ## arg); } while (0)
 152 #undef err
 153 #define err(format, arg...) printk(KERN_ERR format , ## arg)
 154
 155 struct ati_receiver_type {
 156         /* either default_keymap or get_default_keymap should be set */
 157         const char *default_keymap;
 158         const char *(*get_default_keymap)(struct usb_interface *interface);
 159 };
 160
 161 static const char *get_medion_keymap(struct usb_interface *interface)
 162 {
 163         struct usb_device *udev = interface_to_usbdev(interface);
 164
 165         /*
 166          * There are many different Medion remotes shipped with a receiver
 167          * with the same usb id, but the receivers have subtle differences
 168          * in the USB descriptors allowing us to detect them.
 169          */
 170
 171         if (udev->manufacturer && udev->product) {
 172                 if (udev->actconfig->desc.bmAttributes & USB_CONFIG_ATT_WAKEUP) {
 173
 174                         if (!strcmp(udev->manufacturer, "X10 Wireless Technology Inc")
 175                             && !strcmp(udev->product, "USB Receiver"))
 176                                 return RC_MAP_MEDION_X10_DIGITAINER;
 177
 178                         if (!strcmp(udev->manufacturer, "X10 WTI")
 179                             && !strcmp(udev->product, "RF receiver"))
 180                                 return RC_MAP_MEDION_X10_OR2X;
 181                 } else {
 182
 183                          if (!strcmp(udev->manufacturer, "X10 Wireless Technology Inc")
 184                             && !strcmp(udev->product, "USB Receiver"))
 185                                 return RC_MAP_MEDION_X10;
 186                 }
 187         }
 188
 189         dev_info(&interface->dev,
 190                  "Unknown Medion X10 receiver, using default ati_remote Medion keymap\n");
 191
 192         return RC_MAP_MEDION_X10;
 193 }
 194
 195 static const struct ati_receiver_type type_ati          = {
 196         .default_keymap = RC_MAP_ATI_X10
 197 };
 198 static const struct ati_receiver_type type_medion       = {
 199         .get_default_keymap = get_medion_keymap
 200 };
 201 static const struct ati_receiver_type type_firefly      = {
 202         .default_keymap = RC_MAP_SNAPSTREAM_FIREFLY
 203 };
 204
 205 static struct usb_device_id ati_remote_table[] = {
 206         {
 207                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, LOLA_REMOTE_PRODUCT_ID),
 208                 .driver_info = (unsigned long)&type_ati
 209         },
 210         {
 211                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, LOLA2_REMOTE_PRODUCT_ID),
 212                 .driver_info = (unsigned long)&type_ati
 213         },
 214         {
 215                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, ATI_REMOTE_PRODUCT_ID),
 216                 .driver_info = (unsigned long)&type_ati
 217         },
 218         {
 219                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, NVIDIA_REMOTE_PRODUCT_ID),
 220                 .driver_info = (unsigned long)&type_ati
 221         },
 222         {
 223                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, MEDION_REMOTE_PRODUCT_ID),
 224                 .driver_info = (unsigned long)&type_medion
 225         },
 226         {
 227                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, FIREFLY_REMOTE_PRODUCT_ID),
 228                 .driver_info = (unsigned long)&type_firefly
 229         },
 230         {}      /* Terminating entry */
 231 };
 232
 233 MODULE_DEVICE_TABLE(usb, ati_remote_table);
 234
 235 /* Get hi and low bytes of a 16-bits int */
 236 #define HI(a)   ((unsigned char)((a) >> 8))
 237 #define LO(a)   ((unsigned char)((a) & 0xff))
 238
 239 #define SEND_FLAG_IN_PROGRESS   1
 240 #define SEND_FLAG_COMPLETE      2
 241
 242 /* Device initialization strings */
 243 static char init1[] = { 0x01, 0x00, 0x20, 0x14 };
 244 static char init2[] = { 0x01, 0x00, 0x20, 0x14, 0x20, 0x20, 0x20 };
 245
 246 struct ati_remote {
 247         struct input_dev *idev;
 248         struct rc_dev *rdev;
 249         struct usb_device *udev;
 250         struct usb_interface *interface;
 251
 252         struct urb *irq_urb;
 253         struct urb *out_urb;
 254         struct usb_endpoint_descriptor *endpoint_in;
 255         struct usb_endpoint_descriptor *endpoint_out;
 256         unsigned char *inbuf;
 257         unsigned char *outbuf;
 258         dma_addr_t inbuf_dma;
 259         dma_addr_t outbuf_dma;
 260
 261         unsigned char old_data;     /* Detect duplicate events */
 262         unsigned long old_jiffies;
 263         unsigned long acc_jiffies;  /* handle acceleration */
 264         unsigned long first_jiffies;
 265
 266         unsigned int repeat_count;
 267
 268         char rc_name[NAME_BUFSIZE];
 269         char rc_phys[NAME_BUFSIZE];
 270         char mouse_name[NAME_BUFSIZE];
 271         char mouse_phys[NAME_BUFSIZE];
 272
 273         wait_queue_head_t wait;
 274         int send_flags;
 275
 276         int users; /* 0-2, users are rc and input */
 277         struct mutex open_mutex;
 278 };
 279
 280 /* "Kinds" of messages sent from the hardware to the driver. */
 281 #define KIND_END        0
 282 #define KIND_LITERAL    1   /* Simply pass to input system as EV_KEY */
 283 #define KIND_FILTERED   2   /* Add artificial key-up events, drop keyrepeats */
 284 #define KIND_ACCEL      3   /* Translate to EV_REL mouse-move events */
 285
 286 /* Translation table from hardware messages to input events. */
 287 static const struct {
 288         unsigned char kind;
 289         unsigned char data;     /* Raw key code from remote */
 290         unsigned short code;    /* Input layer translation */
 291 }  ati_remote_tbl[] = {
 292         /* Directional control pad axes.  Code is xxyy */
 293         {KIND_ACCEL,    0x70, 0xff00},  /* left */
 294         {KIND_ACCEL,    0x71, 0x0100},  /* right */
 295         {KIND_ACCEL,    0x72, 0x00ff},  /* up */
 296         {KIND_ACCEL,    0x73, 0x0001},  /* down */
 297
 298         /* Directional control pad diagonals */
 299         {KIND_ACCEL,    0x74, 0xffff},  /* left up */
 300         {KIND_ACCEL,    0x75, 0x01ff},  /* right up */
 301         {KIND_ACCEL,    0x77, 0xff01},  /* left down */
 302         {KIND_ACCEL,    0x76, 0x0101},  /* right down */
 303
 304         /* "Mouse button" buttons.  The code below uses the fact that the
 305          * lsbit of the raw code is a down/up indicator. */
 306         {KIND_LITERAL,  0x78, BTN_LEFT}, /* left btn down */
 307         {KIND_LITERAL,  0x79, BTN_LEFT}, /* left btn up */
 308         {KIND_LITERAL,  0x7c, BTN_RIGHT},/* right btn down */
 309         {KIND_LITERAL,  0x7d, BTN_RIGHT},/* right btn up */
 310
 311         /* Artificial "doubleclick" events are generated by the hardware.
 312          * They are mapped to the "side" and "extra" mouse buttons here. */
 313         {KIND_FILTERED, 0x7a, BTN_SIDE}, /* left dblclick */
 314         {KIND_FILTERED, 0x7e, BTN_EXTRA},/* right dblclick */
 315
 316         /* Non-mouse events are handled by rc-core */
 317         {KIND_END, 0x00, 0}
 318 };
 319
 320 /*
 321  * ati_remote_dump_input
 322  */
 323 static void ati_remote_dump(struct device *dev, unsigned char *data,
 324                             unsigned int len)
 325 {
 326         if (len == 1) {
 327                 if (data[0] != (unsigned char)0xff && data[0] != 0x00)
 328                         dev_warn(dev, "Weird byte 0x%02x\n", data[0]);
 329         } else if (len == 4)
 330                 dev_warn(dev, "Weird key %*ph\n", 4, data);
 331         else
 332                 dev_warn(dev, "Weird data, len=%d %*ph ...\n", len, 6, data);
 333 }
 334
 335 /*
 336  * ati_remote_open
 337  */
 338 static int ati_remote_open(struct ati_remote *ati_remote)
 339 {
 340         int err = 0;
 341
 342         mutex_lock(&ati_remote->open_mutex);
 343
 344         if (ati_remote->users++ != 0)
 345                 goto out; /* one was already active */
 346
 347         /* On first open, submit the read urb which was set up previously. */
 348         ati_remote->irq_urb->dev = ati_remote->udev;
 349         if (usb_submit_urb(ati_remote->irq_urb, GFP_KERNEL)) {
 350                 dev_err(&ati_remote->interface->dev,
 351                         "%s: usb_submit_urb failed!\n", __func__);
 352                 err = -EIO;
 353         }
 354
 355 out:    mutex_unlock(&ati_remote->open_mutex);
 356         return err;
 357 }
 358
 359 /*
 360  * ati_remote_close
 361  */
 362 static void ati_remote_close(struct ati_remote *ati_remote)
 363 {
 364         mutex_lock(&ati_remote->open_mutex);
 365         if (--ati_remote->users == 0)
 366                 usb_kill_urb(ati_remote->irq_urb);
 367         mutex_unlock(&ati_remote->open_mutex);
 368 }
 369
 370 static int ati_remote_input_open(struct input_dev *inputdev)
 371 {
 372         struct ati_remote *ati_remote = input_get_drvdata(inputdev);
 373         return ati_remote_open(ati_remote);
 374 }
 375
 376 static void ati_remote_input_close(struct input_dev *inputdev)
 377 {
 378         struct ati_remote *ati_remote = input_get_drvdata(inputdev);
 379         ati_remote_close(ati_remote);
 380 }
 381
 382 static int ati_remote_rc_open(struct rc_dev *rdev)
 383 {
 384         struct ati_remote *ati_remote = rdev->priv;
 385         return ati_remote_open(ati_remote);
 386 }
 387
 388 static void ati_remote_rc_close(struct rc_dev *rdev)
 389 {
 390         struct ati_remote *ati_remote = rdev->priv;
 391         ati_remote_close(ati_remote);
 392 }
 393
 394 /*
 395  * ati_remote_irq_out
 396  */
 397 static void ati_remote_irq_out(struct urb *urb)
 398 {
 399         struct ati_remote *ati_remote = urb->context;
 400
 401         if (urb->status) {
 402                 dev_dbg(&ati_remote->interface->dev, "%s: status %d\n",
 403                         __func__, urb->status);
 404                 return;
 405         }
 406
 407         ati_remote->send_flags |= SEND_FLAG_COMPLETE;
 408         wmb();
 409         wake_up(&ati_remote->wait);
 410 }
 411
 412 /*
 413  * ati_remote_sendpacket
 414  *
 415  * Used to send device initialization strings
 416  */
 417 static int ati_remote_sendpacket(struct ati_remote *ati_remote, u16 cmd,
 418         unsigned char *data)
 419 {
 420         int retval = 0;
 421
 422         /* Set up out_urb */
 423         memcpy(ati_remote->out_urb->transfer_buffer + 1, data, LO(cmd));
 424         ((char *) ati_remote->out_urb->transfer_buffer)[0] = HI(cmd);
 425
 426         ati_remote->out_urb->transfer_buffer_length = LO(cmd) + 1;
 427         ati_remote->out_urb->dev = ati_remote->udev;
 428         ati_remote->send_flags = SEND_FLAG_IN_PROGRESS;
 429
 430         retval = usb_submit_urb(ati_remote->out_urb, GFP_ATOMIC);
 431         if (retval) {
 432                 dev_dbg(&ati_remote->interface->dev,
 433                          "sendpacket: usb_submit_urb failed: %d\n", retval);
 434                 return retval;
 435         }
 436
 437         wait_event_timeout(ati_remote->wait,
 438                 ((ati_remote->out_urb->status != -EINPROGRESS) ||
 439                         (ati_remote->send_flags & SEND_FLAG_COMPLETE)),
 440                 HZ);
 441         usb_kill_urb(ati_remote->out_urb);
 442
 443         return retval;
 444 }
 445
 446 struct accel_times {
 447         const char      value;
 448         unsigned int    msecs;
 449 };
 450
 451 static const struct accel_times accel[] = {
 452         {  1,  125 },
 453         {  2,  250 },
 454         {  4,  500 },
 455         {  6, 1000 },
 456         {  9, 1500 },
 457         { 13, 2000 },
 458         { 20,    0 },
 459 };
 460
 461 /*
 462  * ati_remote_compute_accel
 463  *
 464  * Implements acceleration curve for directional control pad
 465  * If elapsed time since last event is > 1/4 second, user "stopped",
 466  * so reset acceleration. Otherwise, user is probably holding the control
 467  * pad down, so we increase acceleration, ramping up over two seconds to
 468  * a maximum speed.
 469  */
 470 static int ati_remote_compute_accel(struct ati_remote *ati_remote)
 471 {
 472         unsigned long now = jiffies, reset_time;
 473         int i;
 474
 475         reset_time = msecs_to_jiffies(250);
 476
 477         if (time_after(now, ati_remote->old_jiffies + reset_time)) {
 478                 ati_remote->acc_jiffies = now;
 479                 return 1;
 480         }
 481         for (i = 0; i < ARRAY_SIZE(accel) - 1; i++) {
 482                 unsigned long timeout = msecs_to_jiffies(accel[i].msecs);
 483
 484                 if (time_before(now, ati_remote->acc_jiffies + timeout))
 485                         return accel[i].value;
 486         }
 487         return accel[i].value;
 488 }
 489
 490 /*
 491  * ati_remote_report_input
 492  */
 493 static void ati_remote_input_report(struct urb *urb)
 494 {
 495         struct ati_remote *ati_remote = urb->context;
 496         unsigned char *data= ati_remote->inbuf;
 497         struct input_dev *dev = ati_remote->idev;
 498         int index = -1;
 499         int remote_num;
 500         unsigned char scancode;
 501         u32 wheel_keycode = KEY_RESERVED;
 502         int i;
 503
 504         /*
 505          * data[0] = 0x14
 506          * data[1] = data[2] + data[3] + 0xd5 (a checksum byte)
 507          * data[2] = the key code (with toggle bit in MSB with some models)
 508          * data[3] = channel << 4 (the low 4 bits must be zero)
 509          */
 510
 511         /* Deal with strange looking inputs */
 512         if ( urb->actual_length != 4 || data[0] != 0x14 ||
 513              data[1] != (unsigned char)(data[2] + data[3] + 0xD5) ||
 514              (data[3] & 0x0f) != 0x00) {
 515                 ati_remote_dump(&urb->dev->dev, data, urb->actual_length);
 516                 return;
 517         }
 518
 519         if (data[1] != ((data[2] + data[3] + 0xd5) & 0xff)) {
 520                 dbginfo(&ati_remote->interface->dev,
 521                         "wrong checksum in input: %*ph\n", 4, data);
 522                 return;
 523         }
 524
 525         /* Mask unwanted remote channels.  */
 526         /* note: remote_num is 0-based, channel 1 on remote == 0 here */
 527         remote_num = (data[3] >> 4) & 0x0f;
 528         if (channel_mask & (1 << (remote_num + 1))) {
 529                 dbginfo(&ati_remote->interface->dev,
 530                         "Masked input from channel 0x%02x: data %02x, "
 531                         "mask= 0x%02lx\n",
 532                         remote_num, data[2], channel_mask);
 533                 return;
 534         }
 535
 536         /*
 537          * MSB is a toggle code, though only used by some devices
 538          * (e.g. SnapStream Firefly)
 539          */
 540         scancode = data[2] & 0x7f;
 541
 542         dbginfo(&ati_remote->interface->dev,
 543                 "channel 0x%02x; key data %02x, scancode %02x\n",
 544                 remote_num, data[2], scancode);
 545
 546         if (scancode >= 0x70) {
 547                 /*
 548                  * This is either a mouse or scrollwheel event, depending on
 549                  * the remote/keymap.
 550                  * Get the keycode assigned to scancode 0x78/0x70. If it is
 551                  * set, assume this is a scrollwheel up/down event.
 552                  */
 553                 wheel_keycode = rc_g_keycode_from_table(ati_remote->rdev,
 554                                                         scancode & 0x78);
 555
 556                 if (wheel_keycode == KEY_RESERVED) {
 557                         /* scrollwheel was not mapped, assume mouse */
 558
 559                         /* Look up event code index in the mouse translation
 560                          * table.
 561                          */
 562                         for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++) {
 563                                 if (scancode == ati_remote_tbl[i].data) {
 564                                         index = i;
 565                                         break;
 566                                 }
 567                         }
 568                 }
 569         }
 570
 571         if (index >= 0 && ati_remote_tbl[index].kind == KIND_LITERAL) {
 572                 /*
 573                  * The lsbit of the raw key code is a down/up flag.
 574                  * Invert it to match the input layer's conventions.
 575                  */
 576                 input_event(dev, EV_KEY, ati_remote_tbl[index].code,
 577                         !(data[2] & 1));
 578
 579                 ati_remote->old_jiffies = jiffies;
 580
 581         } else if (index < 0 || ati_remote_tbl[index].kind == KIND_FILTERED) {
 582                 unsigned long now = jiffies;
 583
 584                 /* Filter duplicate events which happen "too close" together. */
 585                 if (ati_remote->old_data == data[2] &&
 586                     time_before(now, ati_remote->old_jiffies +
 587                                      msecs_to_jiffies(repeat_filter))) {
 588                         ati_remote->repeat_count++;
 589                 } else {
 590                         ati_remote->repeat_count = 0;
 591                         ati_remote->first_jiffies = now;
 592                 }
 593
 594                 ati_remote->old_jiffies = now;
 595
 596                 /* Ensure we skip at least the 4 first duplicate events
 597                  * (generated by a single keypress), and continue skipping
 598                  * until repeat_delay msecs have passed.
 599                  */
 600                 if (ati_remote->repeat_count > 0 &&
 601                     (ati_remote->repeat_count < 5 ||
 602                      time_before(now, ati_remote->first_jiffies +
 603                                       msecs_to_jiffies(repeat_delay))))
 604                         return;
 605
 606                 if (index >= 0) {
 607                         input_event(dev, EV_KEY, ati_remote_tbl[index].code, 1);
 608                         input_event(dev, EV_KEY, ati_remote_tbl[index].code, 0);
 609                 } else {
 610                         /* Not a mouse event, hand it to rc-core. */
 611                         int count = 1;
 612
 613                         if (wheel_keycode != KEY_RESERVED) {
 614                                 /*
 615                                  * This is a scrollwheel event, send the
 616                                  * scroll up (0x78) / down (0x70) scancode
 617                                  * repeatedly as many times as indicated by
 618                                  * rest of the scancode.
 619                                  */
 620                                 count = (scancode & 0x07) + 1;
 621                                 scancode &= 0x78;
 622                         }
 623
 624                         while (count--) {
 625                                 /*
 626                                 * We don't use the rc-core repeat handling yet as
 627                                 * it would cause ghost repeats which would be a
 628                                 * regression for this driver.
 629                                 */
 630                                 rc_keydown_notimeout(ati_remote->rdev, RC_TYPE_OTHER,
 631                                                      scancode, data[2]);
 632                                 rc_keyup(ati_remote->rdev);
 633                         }
 634                         goto nosync;
 635                 }
 636
 637         } else if (ati_remote_tbl[index].kind == KIND_ACCEL) {
 638                 signed char dx = ati_remote_tbl[index].code >> 8;
 639                 signed char dy = ati_remote_tbl[index].code & 255;
 640
 641                 /*
 642                  * Other event kinds are from the directional control pad, and
 643                  * have an acceleration factor applied to them.  Without this
 644                  * acceleration, the control pad is mostly unusable.
 645                  */
 646                 int acc = ati_remote_compute_accel(ati_remote);
 647                 if (dx)
 648                         input_report_rel(dev, REL_X, dx * acc);
 649                 if (dy)
 650                         input_report_rel(dev, REL_Y, dy * acc);
 651                 ati_remote->old_jiffies = jiffies;
 652
 653         } else {
 654                 dev_dbg(&ati_remote->interface->dev, "ati_remote kind=%d\n",
 655                         ati_remote_tbl[index].kind);
 656                 return;
 657         }
 658         input_sync(dev);
 659 nosync:
 660         ati_remote->old_data = data[2];
 661 }
 662
 663 /*
 664  * ati_remote_irq_in
 665  */
 666 static void ati_remote_irq_in(struct urb *urb)
 667 {
 668         struct ati_remote *ati_remote = urb->context;
 669         int retval;
 670
 671         switch (urb->status) {
 672         case 0:                 /* success */
 673                 ati_remote_input_report(urb);
 674                 break;
 675         case -ECONNRESET:       /* unlink */
 676         case -ENOENT:
 677         case -ESHUTDOWN:
 678                 dev_dbg(&ati_remote->interface->dev,
 679                         "%s: urb error status, unlink?\n",
 680                         __func__);
 681                 return;
 682         default:                /* error */
 683                 dev_dbg(&ati_remote->interface->dev,
 684                         "%s: Nonzero urb status %d\n",
 685                         __func__, urb->status);
 686         }
 687
 688         retval = usb_submit_urb(urb, GFP_ATOMIC);
 689         if (retval)
 690                 dev_err(&ati_remote->interface->dev,
 691                         "%s: usb_submit_urb()=%d\n",
 692                         __func__, retval);
 693 }
 694
 695 /*
 696  * ati_remote_alloc_buffers
 697  */
 698 static int ati_remote_alloc_buffers(struct usb_device *udev,
 699                                     struct ati_remote *ati_remote)
 700 {
 701         ati_remote->inbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
 702                                                &ati_remote->inbuf_dma);
 703         if (!ati_remote->inbuf)
 704                 return -1;
 705
 706         ati_remote->outbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
 707                                                 &ati_remote->outbuf_dma);
 708         if (!ati_remote->outbuf)
 709                 return -1;
 710
 711         ati_remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
 712         if (!ati_remote->irq_urb)
 713                 return -1;
 714
 715         ati_remote->out_urb = usb_alloc_urb(0, GFP_KERNEL);
 716         if (!ati_remote->out_urb)
 717                 return -1;
 718
 719         return 0;
 720 }
 721
 722 /*
 723  * ati_remote_free_buffers
 724  */
 725 static void ati_remote_free_buffers(struct ati_remote *ati_remote)
 726 {
 727         usb_free_urb(ati_remote->irq_urb);
 728         usb_free_urb(ati_remote->out_urb);
 729
 730         usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
 731                 ati_remote->inbuf, ati_remote->inbuf_dma);
 732
 733         usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
 734                 ati_remote->outbuf, ati_remote->outbuf_dma);
 735 }
 736
 737 static void ati_remote_input_init(struct ati_remote *ati_remote)
 738 {
 739         struct input_dev *idev = ati_remote->idev;
 740         int i;
 741
 742         idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 743         idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
 744                 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
 745         idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 746         for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++)
 747                 if (ati_remote_tbl[i].kind == KIND_LITERAL ||
 748                     ati_remote_tbl[i].kind == KIND_FILTERED)
 749                         __set_bit(ati_remote_tbl[i].code, idev->keybit);
 750
 751         input_set_drvdata(idev, ati_remote);
 752
 753         idev->open = ati_remote_input_open;
 754         idev->close = ati_remote_input_close;
 755
 756         idev->name = ati_remote->mouse_name;
 757         idev->phys = ati_remote->mouse_phys;
 758
 759         usb_to_input_id(ati_remote->udev, &idev->id);
 760         idev->dev.parent = &ati_remote->interface->dev;
 761 }
 762
 763 static void ati_remote_rc_init(struct ati_remote *ati_remote)
 764 {
 765         struct rc_dev *rdev = ati_remote->rdev;
 766
 767         rdev->priv = ati_remote;
 768         rdev->driver_type = RC_DRIVER_SCANCODE;
 769         rdev->allowed_protocols = RC_BIT_OTHER;
 770         rdev->driver_name = "ati_remote";
 771
 772         rdev->open = ati_remote_rc_open;
 773         rdev->close = ati_remote_rc_close;
 774
 775         rdev->input_name = ati_remote->rc_name;
 776         rdev->input_phys = ati_remote->rc_phys;
 777
 778         usb_to_input_id(ati_remote->udev, &rdev->input_id);
 779         rdev->dev.parent = &ati_remote->interface->dev;
 780 }
 781
 782 static int ati_remote_initialize(struct ati_remote *ati_remote)
 783 {
 784         struct usb_device *udev = ati_remote->udev;
 785         int pipe, maxp;
 786
 787         init_waitqueue_head(&ati_remote->wait);
 788
 789         /* Set up irq_urb */
 790         pipe = usb_rcvintpipe(udev, ati_remote->endpoint_in->bEndpointAddress);
 791         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 792         maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
 793
 794         usb_fill_int_urb(ati_remote->irq_urb, udev, pipe, ati_remote->inbuf,
 795                          maxp, ati_remote_irq_in, ati_remote,
 796                          ati_remote->endpoint_in->bInterval);
 797         ati_remote->irq_urb->transfer_dma = ati_remote->inbuf_dma;
 798         ati_remote->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 799
 800         /* Set up out_urb */
 801         pipe = usb_sndintpipe(udev, ati_remote->endpoint_out->bEndpointAddress);
 802         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 803         maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
 804
 805         usb_fill_int_urb(ati_remote->out_urb, udev, pipe, ati_remote->outbuf,
 806                          maxp, ati_remote_irq_out, ati_remote,
 807                          ati_remote->endpoint_out->bInterval);
 808         ati_remote->out_urb->transfer_dma = ati_remote->outbuf_dma;
 809         ati_remote->out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 810
 811         /* send initialization strings */
 812         if ((ati_remote_sendpacket(ati_remote, 0x8004, init1)) ||
 813             (ati_remote_sendpacket(ati_remote, 0x8007, init2))) {
 814                 dev_err(&ati_remote->interface->dev,
 815                          "Initializing ati_remote hardware failed.\n");
 816                 return -EIO;
 817         }
 818
 819         return 0;
 820 }
 821
 822 /*
 823  * ati_remote_probe
 824  */
 825 static int ati_remote_probe(struct usb_interface *interface,
 826         const struct usb_device_id *id)
 827 {
 828         struct usb_device *udev = interface_to_usbdev(interface);
 829         struct usb_host_interface *iface_host = interface->cur_altsetting;
 830         struct usb_endpoint_descriptor *endpoint_in, *endpoint_out;
 831         struct ati_receiver_type *type = (struct ati_receiver_type *)id->driver_info;
 832         struct ati_remote *ati_remote;
 833         struct input_dev *input_dev;
 834         struct rc_dev *rc_dev;
 835         int err = -ENOMEM;
 836
 837         if (iface_host->desc.bNumEndpoints != 2) {
 838                 err("%s: Unexpected desc.bNumEndpoints\n", __func__);
 839                 return -ENODEV;
 840         }
 841
 842         endpoint_in = &iface_host->endpoint[0].desc;
 843         endpoint_out = &iface_host->endpoint[1].desc;
 844
 845         if (!usb_endpoint_is_int_in(endpoint_in)) {
 846                 err("%s: Unexpected endpoint_in\n", __func__);
 847                 return -ENODEV;
 848         }
 849         if (le16_to_cpu(endpoint_in->wMaxPacketSize) == 0) {
 850                 err("%s: endpoint_in message size==0? \n", __func__);
 851                 return -ENODEV;
 852         }
 853
 854         ati_remote = kzalloc(sizeof (struct ati_remote), GFP_KERNEL);
 855         rc_dev = rc_allocate_device();
 856         if (!ati_remote || !rc_dev)
 857                 goto exit_free_dev_rdev;
 858
 859         /* Allocate URB buffers, URBs */
 860         if (ati_remote_alloc_buffers(udev, ati_remote))
 861                 goto exit_free_buffers;
 862
 863         ati_remote->endpoint_in = endpoint_in;
 864         ati_remote->endpoint_out = endpoint_out;
 865         ati_remote->udev = udev;
 866         ati_remote->rdev = rc_dev;
 867         ati_remote->interface = interface;
 868
 869         usb_make_path(udev, ati_remote->rc_phys, sizeof(ati_remote->rc_phys));
 870         strlcpy(ati_remote->mouse_phys, ati_remote->rc_phys,
 871                 sizeof(ati_remote->mouse_phys));
 872
 873         strlcat(ati_remote->rc_phys, "/input0", sizeof(ati_remote->rc_phys));
 874         strlcat(ati_remote->mouse_phys, "/input1", sizeof(ati_remote->mouse_phys));
 875
 876         snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name), "%s%s%s",
 877                 udev->manufacturer ?: "",
 878                 udev->manufacturer && udev->product ? " " : "",
 879                 udev->product ?: "");
 880
 881         if (!strlen(ati_remote->rc_name))
 882                 snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name),
 883                         DRIVER_DESC "(%04x,%04x)",
 884                         le16_to_cpu(ati_remote->udev->descriptor.idVendor),
 885                         le16_to_cpu(ati_remote->udev->descriptor.idProduct));
 886
 887         snprintf(ati_remote->mouse_name, sizeof(ati_remote->mouse_name),
 888                  "%s mouse", ati_remote->rc_name);
 889
 890         rc_dev->map_name = RC_MAP_ATI_X10; /* default map */
 891
 892         /* set default keymap according to receiver model */
 893         if (type) {
 894                 if (type->default_keymap)
 895                         rc_dev->map_name = type->default_keymap;
 896                 else if (type->get_default_keymap)
 897                         rc_dev->map_name = type->get_default_keymap(interface);
 898         }
 899
 900         ati_remote_rc_init(ati_remote);
 901         mutex_init(&ati_remote->open_mutex);
 902
 903         /* Device Hardware Initialization - fills in ati_remote->idev from udev. */
 904         err = ati_remote_initialize(ati_remote);
 905         if (err)
 906                 goto exit_kill_urbs;
 907
 908         /* Set up and register rc device */
 909         err = rc_register_device(ati_remote->rdev);
 910         if (err)
 911                 goto exit_kill_urbs;
 912
 913         /* use our delay for rc_dev */
 914         ati_remote->rdev->input_dev->rep[REP_DELAY] = repeat_delay;
 915
 916         /* Set up and register mouse input device */
 917         if (mouse) {
 918                 input_dev = input_allocate_device();
 919                 if (!input_dev) {
 920                         err = -ENOMEM;
 921                         goto exit_unregister_device;
 922                 }
 923
 924                 ati_remote->idev = input_dev;
 925                 ati_remote_input_init(ati_remote);
 926                 err = input_register_device(input_dev);
 927
 928                 if (err)
 929                         goto exit_free_input_device;
 930         }
 931
 932         usb_set_intfdata(interface, ati_remote);
 933         return 0;
 934
 935  exit_free_input_device:
 936         input_free_device(input_dev);
 937  exit_unregister_device:
 938         rc_unregister_device(rc_dev);
 939         rc_dev = NULL;
 940  exit_kill_urbs:
 941         usb_kill_urb(ati_remote->irq_urb);
 942         usb_kill_urb(ati_remote->out_urb);
 943  exit_free_buffers:
 944         ati_remote_free_buffers(ati_remote);
 945  exit_free_dev_rdev:
 946          rc_free_device(rc_dev);
 947         kfree(ati_remote);
 948         return err;
 949 }
 950
 951 /*
 952  * ati_remote_disconnect
 953  */
 954 static void ati_remote_disconnect(struct usb_interface *interface)
 955 {
 956         struct ati_remote *ati_remote;
 957
 958         ati_remote = usb_get_intfdata(interface);
 959         usb_set_intfdata(interface, NULL);
 960         if (!ati_remote) {
 961                 dev_warn(&interface->dev, "%s - null device?\n", __func__);
 962                 return;
 963         }
 964
 965         usb_kill_urb(ati_remote->irq_urb);
 966         usb_kill_urb(ati_remote->out_urb);
 967         if (ati_remote->idev)
 968                 input_unregister_device(ati_remote->idev);
 969         rc_unregister_device(ati_remote->rdev);
 970         ati_remote_free_buffers(ati_remote);
 971         kfree(ati_remote);
 972 }
 973
 974 /* usb specific object to register with the usb subsystem */
 975 static struct usb_driver ati_remote_driver = {
 976         .name         = "ati_remote",
 977         .probe        = ati_remote_probe,
 978         .disconnect   = ati_remote_disconnect,
 979         .id_table     = ati_remote_table,
 980 };
 981
 982 module_usb_driver(ati_remote_driver);
 983
 984 MODULE_AUTHOR(DRIVER_AUTHOR);
 985 MODULE_DESCRIPTION(DRIVER_DESC);
 986 MODULE_LICENSE("GPL");