drivers/media/rc/ati

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
get_medion_keymap
ati_remote_dump
ati_remote_open
ati_remote_close
ati_remote_input_open
ati_remote_input_close
ati_remote_rc_open
ati_remote_rc_close
ati_remote_irq_out
ati_remote_sendpacket
ati_remote_compute_accel
ati_remote_input_report
ati_remote_irq_in
ati_remote_alloc_buffers
ati_remote_free_buffers
ati_remote_input_init
ati_remote_rc_init
ati_remote_initialize
ati_remote_probe
ati_remote_disconnect
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  USB ATI Remote support
   4  *
   5  *                Copyright (c) 2011, 2012 Anssi Hannula <anssi.hannula@iki.fi>
   6  *  Version 2.2.0 Copyright (c) 2004 Torrey Hoffman <thoffman@arnor.net>
   7  *  Version 2.1.1 Copyright (c) 2002 Vladimir Dergachev
   8  *
   9  *  This 2.2.0 version is a rewrite / cleanup of the 2.1.1 driver, including
  10  *  porting to the 2.6 kernel interfaces, along with other modification
  11  *  to better match the style of the existing usb/input drivers.  However, the
  12  *  protocol and hardware handling is essentially unchanged from 2.1.1.
  13  *
  14  *  The 2.1.1 driver was derived from the usbati_remote and usbkbd drivers by
  15  *  Vojtech Pavlik.
  16  *
  17  *  Changes:
  18  *
  19  *  Feb 2004: Torrey Hoffman <thoffman@arnor.net>
  20  *            Version 2.2.0
  21  *  Jun 2004: Torrey Hoffman <thoffman@arnor.net>
  22  *            Version 2.2.1
  23  *            Added key repeat support contributed by:
  24  *                Vincent Vanackere <vanackere@lif.univ-mrs.fr>
  25  *            Added support for the "Lola" remote contributed by:
  26  *                Seth Cohn <sethcohn@yahoo.com>
  27  *
  28  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  29  *
  30  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
  31  *
  32  * Hardware & software notes
  33  *
  34  * These remote controls are distributed by ATI as part of their
  35  * "All-In-Wonder" video card packages.  The receiver self-identifies as a
  36  * "USB Receiver" with manufacturer "X10 Wireless Technology Inc".
  37  *
  38  * The "Lola" remote is available from X10.  See:
  39  *    http://www.x10.com/products/lola_sg1.htm
  40  * The Lola is similar to the ATI remote but has no mouse support, and slightly
  41  * different keys.
  42  *
  43  * It is possible to use multiple receivers and remotes on multiple computers
  44  * simultaneously by configuring them to use specific channels.
  45  *
  46  * The RF protocol used by the remote supports 16 distinct channels, 1 to 16.
  47  * Actually, it may even support more, at least in some revisions of the
  48  * hardware.
  49  *
  50  * Each remote can be configured to transmit on one channel as follows:
  51  *   - Press and hold the "hand icon" button.
  52  *   - When the red LED starts to blink, let go of the "hand icon" button.
  53  *   - When it stops blinking, input the channel code as two digits, from 01
  54  *     to 16, and press the hand icon again.
  55  *
  56  * The timing can be a little tricky.  Try loading the module with debug=1
  57  * to have the kernel print out messages about the remote control number
  58  * and mask.  Note: debugging prints remote numbers as zero-based hexadecimal.
  59  *
  60  * The driver has a "channel_mask" parameter. This bitmask specifies which
  61  * channels will be ignored by the module.  To mask out channels, just add
  62  * all the 2^channel_number values together.
  63  *
  64  * For instance, set channel_mask = 2^4 = 16 (binary 10000) to make ati_remote
  65  * ignore signals coming from remote controls transmitting on channel 4, but
  66  * accept all other channels.
  67  *
  68  * Or, set channel_mask = 65533, (0xFFFD), and all channels except 1 will be
  69  * ignored.
  70  *
  71  * The default is 0 (respond to all channels). Bit 0 and bits 17-32 of this
  72  * parameter are unused.
  73  */
  74 
  75 #include <linux/kernel.h>
  76 #include <linux/errno.h>
  77 #include <linux/init.h>
  78 #include <linux/slab.h>
  79 #include <linux/module.h>
  80 #include <linux/mutex.h>
  81 #include <linux/usb/input.h>
  82 #include <linux/wait.h>
  83 #include <linux/jiffies.h>
  84 #include <media/rc-core.h>
  85 
  86 /*
  87  * Module and Version Information, Module Parameters
  88  */
  89 
  90 #define ATI_REMOTE_VENDOR_ID            0x0bc7
  91 #define LOLA_REMOTE_PRODUCT_ID          0x0002
  92 #define LOLA2_REMOTE_PRODUCT_ID         0x0003
  93 #define ATI_REMOTE_PRODUCT_ID           0x0004
  94 #define NVIDIA_REMOTE_PRODUCT_ID        0x0005
  95 #define MEDION_REMOTE_PRODUCT_ID        0x0006
  96 #define FIREFLY_REMOTE_PRODUCT_ID       0x0008
  97 
  98 #define DRIVER_VERSION          "2.2.1"
  99 #define DRIVER_AUTHOR           "Torrey Hoffman <thoffman@arnor.net>"
 100 #define DRIVER_DESC             "ATI/X10 RF USB Remote Control"
 101 
 102 #define NAME_BUFSIZE      80    /* size of product name, path buffers */
 103 #define DATA_BUFSIZE      63    /* size of URB data buffers */
 104 
 105 /*
 106  * Duplicate event filtering time.
 107  * Sequential, identical KIND_FILTERED inputs with less than
 108  * FILTER_TIME milliseconds between them are considered as repeat
 109  * events. The hardware generates 5 events for the first keypress
 110  * and we have to take this into account for an accurate repeat
 111  * behaviour.
 112  */
 113 #define FILTER_TIME     60 /* msec */
 114 #define REPEAT_DELAY    500 /* msec */
 115 
 116 static unsigned long channel_mask;
 117 module_param(channel_mask, ulong, 0644);
 118 MODULE_PARM_DESC(channel_mask, "Bitmask of remote control channels to ignore");
 119 
 120 static int debug;
 121 module_param(debug, int, 0644);
 122 MODULE_PARM_DESC(debug, "Enable extra debug messages and information");
 123 
 124 static int repeat_filter = FILTER_TIME;
 125 module_param(repeat_filter, int, 0644);
 126 MODULE_PARM_DESC(repeat_filter, "Repeat filter time, default = 60 msec");
 127 
 128 static int repeat_delay = REPEAT_DELAY;
 129 module_param(repeat_delay, int, 0644);
 130 MODULE_PARM_DESC(repeat_delay, "Delay before sending repeats, default = 500 msec");
 131 
 132 static bool mouse = true;
 133 module_param(mouse, bool, 0444);
 134 MODULE_PARM_DESC(mouse, "Enable mouse device, default = yes");
 135 
 136 #define dbginfo(dev, format, arg...) \
 137         do { if (debug) dev_info(dev , format , ## arg); } while (0)
 138 #undef err
 139 #define err(format, arg...) printk(KERN_ERR format , ## arg)
 140 
 141 struct ati_receiver_type {
 142         /* either default_keymap or get_default_keymap should be set */
 143         const char *default_keymap;
 144         const char *(*get_default_keymap)(struct usb_interface *interface);
 145 };
 146 
 147 static const char *get_medion_keymap(struct usb_interface *interface)
 148 {
 149         struct usb_device *udev = interface_to_usbdev(interface);
 150 
 151         /*
 152          * There are many different Medion remotes shipped with a receiver
 153          * with the same usb id, but the receivers have subtle differences
 154          * in the USB descriptors allowing us to detect them.
 155          */
 156 
 157         if (udev->manufacturer && udev->product) {
 158                 if (udev->actconfig->desc.bmAttributes & USB_CONFIG_ATT_WAKEUP) {
 159 
 160                         if (!strcmp(udev->manufacturer, "X10 Wireless Technology Inc")
 161                             && !strcmp(udev->product, "USB Receiver"))
 162                                 return RC_MAP_MEDION_X10_DIGITAINER;
 163 
 164                         if (!strcmp(udev->manufacturer, "X10 WTI")
 165                             && !strcmp(udev->product, "RF receiver"))
 166                                 return RC_MAP_MEDION_X10_OR2X;
 167                 } else {
 168 
 169                          if (!strcmp(udev->manufacturer, "X10 Wireless Technology Inc")
 170                             && !strcmp(udev->product, "USB Receiver"))
 171                                 return RC_MAP_MEDION_X10;
 172                 }
 173         }
 174 
 175         dev_info(&interface->dev,
 176                  "Unknown Medion X10 receiver, using default ati_remote Medion keymap\n");
 177 
 178         return RC_MAP_MEDION_X10;
 179 }
 180 
 181 static const struct ati_receiver_type type_ati          = {
 182         .default_keymap = RC_MAP_ATI_X10
 183 };
 184 static const struct ati_receiver_type type_medion       = {
 185         .get_default_keymap = get_medion_keymap
 186 };
 187 static const struct ati_receiver_type type_firefly      = {
 188         .default_keymap = RC_MAP_SNAPSTREAM_FIREFLY
 189 };
 190 
 191 static const struct usb_device_id ati_remote_table[] = {
 192         {
 193                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, LOLA_REMOTE_PRODUCT_ID),
 194                 .driver_info = (unsigned long)&type_ati
 195         },
 196         {
 197                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, LOLA2_REMOTE_PRODUCT_ID),
 198                 .driver_info = (unsigned long)&type_ati
 199         },
 200         {
 201                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, ATI_REMOTE_PRODUCT_ID),
 202                 .driver_info = (unsigned long)&type_ati
 203         },
 204         {
 205                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, NVIDIA_REMOTE_PRODUCT_ID),
 206                 .driver_info = (unsigned long)&type_ati
 207         },
 208         {
 209                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, MEDION_REMOTE_PRODUCT_ID),
 210                 .driver_info = (unsigned long)&type_medion
 211         },
 212         {
 213                 USB_DEVICE(ATI_REMOTE_VENDOR_ID, FIREFLY_REMOTE_PRODUCT_ID),
 214                 .driver_info = (unsigned long)&type_firefly
 215         },
 216         {}      /* Terminating entry */
 217 };
 218 
 219 MODULE_DEVICE_TABLE(usb, ati_remote_table);
 220 
 221 /* Get hi and low bytes of a 16-bits int */
 222 #define HI(a)   ((unsigned char)((a) >> 8))
 223 #define LO(a)   ((unsigned char)((a) & 0xff))
 224 
 225 #define SEND_FLAG_IN_PROGRESS   1
 226 #define SEND_FLAG_COMPLETE      2
 227 
 228 /* Device initialization strings */
 229 static char init1[] = { 0x01, 0x00, 0x20, 0x14 };
 230 static char init2[] = { 0x01, 0x00, 0x20, 0x14, 0x20, 0x20, 0x20 };
 231 
 232 struct ati_remote {
 233         struct input_dev *idev;
 234         struct rc_dev *rdev;
 235         struct usb_device *udev;
 236         struct usb_interface *interface;
 237 
 238         struct urb *irq_urb;
 239         struct urb *out_urb;
 240         struct usb_endpoint_descriptor *endpoint_in;
 241         struct usb_endpoint_descriptor *endpoint_out;
 242         unsigned char *inbuf;
 243         unsigned char *outbuf;
 244         dma_addr_t inbuf_dma;
 245         dma_addr_t outbuf_dma;
 246 
 247         unsigned char old_data;     /* Detect duplicate events */
 248         unsigned long old_jiffies;
 249         unsigned long acc_jiffies;  /* handle acceleration */
 250         unsigned long first_jiffies;
 251 
 252         unsigned int repeat_count;
 253 
 254         char rc_name[NAME_BUFSIZE];
 255         char rc_phys[NAME_BUFSIZE];
 256         char mouse_name[NAME_BUFSIZE];
 257         char mouse_phys[NAME_BUFSIZE];
 258 
 259         wait_queue_head_t wait;
 260         int send_flags;
 261 
 262         int users; /* 0-2, users are rc and input */
 263         struct mutex open_mutex;
 264 };
 265 
 266 /* "Kinds" of messages sent from the hardware to the driver. */
 267 #define KIND_END        0
 268 #define KIND_LITERAL    1   /* Simply pass to input system as EV_KEY */
 269 #define KIND_FILTERED   2   /* Add artificial key-up events, drop keyrepeats */
 270 #define KIND_ACCEL      3   /* Translate to EV_REL mouse-move events */
 271 
 272 /* Translation table from hardware messages to input events. */
 273 static const struct {
 274         unsigned char kind;
 275         unsigned char data;     /* Raw key code from remote */
 276         unsigned short code;    /* Input layer translation */
 277 }  ati_remote_tbl[] = {
 278         /* Directional control pad axes.  Code is xxyy */
 279         {KIND_ACCEL,    0x70, 0xff00},  /* left */
 280         {KIND_ACCEL,    0x71, 0x0100},  /* right */
 281         {KIND_ACCEL,    0x72, 0x00ff},  /* up */
 282         {KIND_ACCEL,    0x73, 0x0001},  /* down */
 283 
 284         /* Directional control pad diagonals */
 285         {KIND_ACCEL,    0x74, 0xffff},  /* left up */
 286         {KIND_ACCEL,    0x75, 0x01ff},  /* right up */
 287         {KIND_ACCEL,    0x77, 0xff01},  /* left down */
 288         {KIND_ACCEL,    0x76, 0x0101},  /* right down */
 289 
 290         /* "Mouse button" buttons.  The code below uses the fact that the
 291          * lsbit of the raw code is a down/up indicator. */
 292         {KIND_LITERAL,  0x78, BTN_LEFT}, /* left btn down */
 293         {KIND_LITERAL,  0x79, BTN_LEFT}, /* left btn up */
 294         {KIND_LITERAL,  0x7c, BTN_RIGHT},/* right btn down */
 295         {KIND_LITERAL,  0x7d, BTN_RIGHT},/* right btn up */
 296 
 297         /* Artificial "double-click" events are generated by the hardware.
 298          * They are mapped to the "side" and "extra" mouse buttons here. */
 299         {KIND_FILTERED, 0x7a, BTN_SIDE}, /* left dblclick */
 300         {KIND_FILTERED, 0x7e, BTN_EXTRA},/* right dblclick */
 301 
 302         /* Non-mouse events are handled by rc-core */
 303         {KIND_END, 0x00, 0}
 304 };
 305 
 306 /*
 307  * ati_remote_dump_input
 308  */
 309 static void ati_remote_dump(struct device *dev, unsigned char *data,
 310                             unsigned int len)
 311 {
 312         if (len == 1) {
 313                 if (data[0] != (unsigned char)0xff && data[0] != 0x00)
 314                         dev_warn(dev, "Weird byte 0x%02x\n", data[0]);
 315         } else if (len == 4)
 316                 dev_warn(dev, "Weird key %*ph\n", 4, data);
 317         else
 318                 dev_warn(dev, "Weird data, len=%d %*ph ...\n", len, 6, data);
 319 }
 320 
 321 /*
 322  * ati_remote_open
 323  */
 324 static int ati_remote_open(struct ati_remote *ati_remote)
 325 {
 326         int err = 0;
 327 
 328         mutex_lock(&ati_remote->open_mutex);
 329 
 330         if (ati_remote->users++ != 0)
 331                 goto out; /* one was already active */
 332 
 333         /* On first open, submit the read urb which was set up previously. */
 334         ati_remote->irq_urb->dev = ati_remote->udev;
 335         if (usb_submit_urb(ati_remote->irq_urb, GFP_KERNEL)) {
 336                 dev_err(&ati_remote->interface->dev,
 337                         "%s: usb_submit_urb failed!\n", __func__);
 338                 err = -EIO;
 339         }
 340 
 341 out:    mutex_unlock(&ati_remote->open_mutex);
 342         return err;
 343 }
 344 
 345 /*
 346  * ati_remote_close
 347  */
 348 static void ati_remote_close(struct ati_remote *ati_remote)
 349 {
 350         mutex_lock(&ati_remote->open_mutex);
 351         if (--ati_remote->users == 0)
 352                 usb_kill_urb(ati_remote->irq_urb);
 353         mutex_unlock(&ati_remote->open_mutex);
 354 }
 355 
 356 static int ati_remote_input_open(struct input_dev *inputdev)
 357 {
 358         struct ati_remote *ati_remote = input_get_drvdata(inputdev);
 359         return ati_remote_open(ati_remote);
 360 }
 361 
 362 static void ati_remote_input_close(struct input_dev *inputdev)
 363 {
 364         struct ati_remote *ati_remote = input_get_drvdata(inputdev);
 365         ati_remote_close(ati_remote);
 366 }
 367 
 368 static int ati_remote_rc_open(struct rc_dev *rdev)
 369 {
 370         struct ati_remote *ati_remote = rdev->priv;
 371         return ati_remote_open(ati_remote);
 372 }
 373 
 374 static void ati_remote_rc_close(struct rc_dev *rdev)
 375 {
 376         struct ati_remote *ati_remote = rdev->priv;
 377         ati_remote_close(ati_remote);
 378 }
 379 
 380 /*
 381  * ati_remote_irq_out
 382  */
 383 static void ati_remote_irq_out(struct urb *urb)
 384 {
 385         struct ati_remote *ati_remote = urb->context;
 386 
 387         if (urb->status) {
 388                 dev_dbg(&ati_remote->interface->dev, "%s: status %d\n",
 389                         __func__, urb->status);
 390                 return;
 391         }
 392 
 393         ati_remote->send_flags |= SEND_FLAG_COMPLETE;
 394         wmb();
 395         wake_up(&ati_remote->wait);
 396 }
 397 
 398 /*
 399  * ati_remote_sendpacket
 400  *
 401  * Used to send device initialization strings
 402  */
 403 static int ati_remote_sendpacket(struct ati_remote *ati_remote, u16 cmd,
 404         unsigned char *data)
 405 {
 406         int retval = 0;
 407 
 408         /* Set up out_urb */
 409         memcpy(ati_remote->out_urb->transfer_buffer + 1, data, LO(cmd));
 410         ((char *) ati_remote->out_urb->transfer_buffer)[0] = HI(cmd);
 411 
 412         ati_remote->out_urb->transfer_buffer_length = LO(cmd) + 1;
 413         ati_remote->out_urb->dev = ati_remote->udev;
 414         ati_remote->send_flags = SEND_FLAG_IN_PROGRESS;
 415 
 416         retval = usb_submit_urb(ati_remote->out_urb, GFP_ATOMIC);
 417         if (retval) {
 418                 dev_dbg(&ati_remote->interface->dev,
 419                          "sendpacket: usb_submit_urb failed: %d\n", retval);
 420                 return retval;
 421         }
 422 
 423         wait_event_timeout(ati_remote->wait,
 424                 ((ati_remote->out_urb->status != -EINPROGRESS) ||
 425                         (ati_remote->send_flags & SEND_FLAG_COMPLETE)),
 426                 HZ);
 427         usb_kill_urb(ati_remote->out_urb);
 428 
 429         return retval;
 430 }
 431 
 432 struct accel_times {
 433         const char      value;
 434         unsigned int    msecs;
 435 };
 436 
 437 static const struct accel_times accel[] = {
 438         {  1,  125 },
 439         {  2,  250 },
 440         {  4,  500 },
 441         {  6, 1000 },
 442         {  9, 1500 },
 443         { 13, 2000 },
 444         { 20,    0 },
 445 };
 446 
 447 /*
 448  * ati_remote_compute_accel
 449  *
 450  * Implements acceleration curve for directional control pad
 451  * If elapsed time since last event is > 1/4 second, user "stopped",
 452  * so reset acceleration. Otherwise, user is probably holding the control
 453  * pad down, so we increase acceleration, ramping up over two seconds to
 454  * a maximum speed.
 455  */
 456 static int ati_remote_compute_accel(struct ati_remote *ati_remote)
 457 {
 458         unsigned long now = jiffies, reset_time;
 459         int i;
 460 
 461         reset_time = msecs_to_jiffies(250);
 462 
 463         if (time_after(now, ati_remote->old_jiffies + reset_time)) {
 464                 ati_remote->acc_jiffies = now;
 465                 return 1;
 466         }
 467         for (i = 0; i < ARRAY_SIZE(accel) - 1; i++) {
 468                 unsigned long timeout = msecs_to_jiffies(accel[i].msecs);
 469 
 470                 if (time_before(now, ati_remote->acc_jiffies + timeout))
 471                         return accel[i].value;
 472         }
 473         return accel[i].value;
 474 }
 475 
 476 /*
 477  * ati_remote_report_input
 478  */
 479 static void ati_remote_input_report(struct urb *urb)
 480 {
 481         struct ati_remote *ati_remote = urb->context;
 482         unsigned char *data= ati_remote->inbuf;
 483         struct input_dev *dev = ati_remote->idev;
 484         int index = -1;
 485         int remote_num;
 486         unsigned char scancode;
 487         u32 wheel_keycode = KEY_RESERVED;
 488         int i;
 489 
 490         /*
 491          * data[0] = 0x14
 492          * data[1] = data[2] + data[3] + 0xd5 (a checksum byte)
 493          * data[2] = the key code (with toggle bit in MSB with some models)
 494          * data[3] = channel << 4 (the low 4 bits must be zero)
 495          */
 496 
 497         /* Deal with strange looking inputs */
 498         if ( urb->actual_length != 4 || data[0] != 0x14 ||
 499              data[1] != (unsigned char)(data[2] + data[3] + 0xD5) ||
 500              (data[3] & 0x0f) != 0x00) {
 501                 ati_remote_dump(&urb->dev->dev, data, urb->actual_length);
 502                 return;
 503         }
 504 
 505         if (data[1] != ((data[2] + data[3] + 0xd5) & 0xff)) {
 506                 dbginfo(&ati_remote->interface->dev,
 507                         "wrong checksum in input: %*ph\n", 4, data);
 508                 return;
 509         }
 510 
 511         /* Mask unwanted remote channels.  */
 512         /* note: remote_num is 0-based, channel 1 on remote == 0 here */
 513         remote_num = (data[3] >> 4) & 0x0f;
 514         if (channel_mask & (1 << (remote_num + 1))) {
 515                 dbginfo(&ati_remote->interface->dev,
 516                         "Masked input from channel 0x%02x: data %02x, mask= 0x%02lx\n",
 517                         remote_num, data[2], channel_mask);
 518                 return;
 519         }
 520 
 521         /*
 522          * MSB is a toggle code, though only used by some devices
 523          * (e.g. SnapStream Firefly)
 524          */
 525         scancode = data[2] & 0x7f;
 526 
 527         dbginfo(&ati_remote->interface->dev,
 528                 "channel 0x%02x; key data %02x, scancode %02x\n",
 529                 remote_num, data[2], scancode);
 530 
 531         if (scancode >= 0x70) {
 532                 /*
 533                  * This is either a mouse or scrollwheel event, depending on
 534                  * the remote/keymap.
 535                  * Get the keycode assigned to scancode 0x78/0x70. If it is
 536                  * set, assume this is a scrollwheel up/down event.
 537                  */
 538                 wheel_keycode = rc_g_keycode_from_table(ati_remote->rdev,
 539                                                         scancode & 0x78);
 540 
 541                 if (wheel_keycode == KEY_RESERVED) {
 542                         /* scrollwheel was not mapped, assume mouse */
 543 
 544                         /* Look up event code index in the mouse translation
 545                          * table.
 546                          */
 547                         for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++) {
 548                                 if (scancode == ati_remote_tbl[i].data) {
 549                                         index = i;
 550                                         break;
 551                                 }
 552                         }
 553                 }
 554         }
 555 
 556         if (index >= 0 && ati_remote_tbl[index].kind == KIND_LITERAL) {
 557                 /*
 558                  * The lsbit of the raw key code is a down/up flag.
 559                  * Invert it to match the input layer's conventions.
 560                  */
 561                 input_event(dev, EV_KEY, ati_remote_tbl[index].code,
 562                         !(data[2] & 1));
 563 
 564                 ati_remote->old_jiffies = jiffies;
 565 
 566         } else if (index < 0 || ati_remote_tbl[index].kind == KIND_FILTERED) {
 567                 unsigned long now = jiffies;
 568 
 569                 /* Filter duplicate events which happen "too close" together. */
 570                 if (ati_remote->old_data == data[2] &&
 571                     time_before(now, ati_remote->old_jiffies +
 572                                      msecs_to_jiffies(repeat_filter))) {
 573                         ati_remote->repeat_count++;
 574                 } else {
 575                         ati_remote->repeat_count = 0;
 576                         ati_remote->first_jiffies = now;
 577                 }
 578 
 579                 ati_remote->old_jiffies = now;
 580 
 581                 /* Ensure we skip at least the 4 first duplicate events
 582                  * (generated by a single keypress), and continue skipping
 583                  * until repeat_delay msecs have passed.
 584                  */
 585                 if (ati_remote->repeat_count > 0 &&
 586                     (ati_remote->repeat_count < 5 ||
 587                      time_before(now, ati_remote->first_jiffies +
 588                                       msecs_to_jiffies(repeat_delay))))
 589                         return;
 590 
 591                 if (index >= 0) {
 592                         input_event(dev, EV_KEY, ati_remote_tbl[index].code, 1);
 593                         input_event(dev, EV_KEY, ati_remote_tbl[index].code, 0);
 594                 } else {
 595                         /* Not a mouse event, hand it to rc-core. */
 596                         int count = 1;
 597 
 598                         if (wheel_keycode != KEY_RESERVED) {
 599                                 /*
 600                                  * This is a scrollwheel event, send the
 601                                  * scroll up (0x78) / down (0x70) scancode
 602                                  * repeatedly as many times as indicated by
 603                                  * rest of the scancode.
 604                                  */
 605                                 count = (scancode & 0x07) + 1;
 606                                 scancode &= 0x78;
 607                         }
 608 
 609                         while (count--) {
 610                                 /*
 611                                 * We don't use the rc-core repeat handling yet as
 612                                 * it would cause ghost repeats which would be a
 613                                 * regression for this driver.
 614                                 */
 615                                 rc_keydown_notimeout(ati_remote->rdev,
 616                                                      RC_PROTO_OTHER,
 617                                                      scancode, data[2]);
 618                                 rc_keyup(ati_remote->rdev);
 619                         }
 620                         goto nosync;
 621                 }
 622 
 623         } else if (ati_remote_tbl[index].kind == KIND_ACCEL) {
 624                 signed char dx = ati_remote_tbl[index].code >> 8;
 625                 signed char dy = ati_remote_tbl[index].code & 255;
 626 
 627                 /*
 628                  * Other event kinds are from the directional control pad, and
 629                  * have an acceleration factor applied to them.  Without this
 630                  * acceleration, the control pad is mostly unusable.
 631                  */
 632                 int acc = ati_remote_compute_accel(ati_remote);
 633                 if (dx)
 634                         input_report_rel(dev, REL_X, dx * acc);
 635                 if (dy)
 636                         input_report_rel(dev, REL_Y, dy * acc);
 637                 ati_remote->old_jiffies = jiffies;
 638 
 639         } else {
 640                 dev_dbg(&ati_remote->interface->dev, "ati_remote kind=%d\n",
 641                         ati_remote_tbl[index].kind);
 642                 return;
 643         }
 644         input_sync(dev);
 645 nosync:
 646         ati_remote->old_data = data[2];
 647 }
 648 
 649 /*
 650  * ati_remote_irq_in
 651  */
 652 static void ati_remote_irq_in(struct urb *urb)
 653 {
 654         struct ati_remote *ati_remote = urb->context;
 655         int retval;
 656 
 657         switch (urb->status) {
 658         case 0:                 /* success */
 659                 ati_remote_input_report(urb);
 660                 break;
 661         case -ECONNRESET:       /* unlink */
 662         case -ENOENT:
 663         case -ESHUTDOWN:
 664                 dev_dbg(&ati_remote->interface->dev,
 665                         "%s: urb error status, unlink?\n",
 666                         __func__);
 667                 return;
 668         default:                /* error */
 669                 dev_dbg(&ati_remote->interface->dev,
 670                         "%s: Nonzero urb status %d\n",
 671                         __func__, urb->status);
 672         }
 673 
 674         retval = usb_submit_urb(urb, GFP_ATOMIC);
 675         if (retval)
 676                 dev_err(&ati_remote->interface->dev,
 677                         "%s: usb_submit_urb()=%d\n",
 678                         __func__, retval);
 679 }
 680 
 681 /*
 682  * ati_remote_alloc_buffers
 683  */
 684 static int ati_remote_alloc_buffers(struct usb_device *udev,
 685                                     struct ati_remote *ati_remote)
 686 {
 687         ati_remote->inbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
 688                                                &ati_remote->inbuf_dma);
 689         if (!ati_remote->inbuf)
 690                 return -1;
 691 
 692         ati_remote->outbuf = usb_alloc_coherent(udev, DATA_BUFSIZE, GFP_ATOMIC,
 693                                                 &ati_remote->outbuf_dma);
 694         if (!ati_remote->outbuf)
 695                 return -1;
 696 
 697         ati_remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
 698         if (!ati_remote->irq_urb)
 699                 return -1;
 700 
 701         ati_remote->out_urb = usb_alloc_urb(0, GFP_KERNEL);
 702         if (!ati_remote->out_urb)
 703                 return -1;
 704 
 705         return 0;
 706 }
 707 
 708 /*
 709  * ati_remote_free_buffers
 710  */
 711 static void ati_remote_free_buffers(struct ati_remote *ati_remote)
 712 {
 713         usb_free_urb(ati_remote->irq_urb);
 714         usb_free_urb(ati_remote->out_urb);
 715 
 716         usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
 717                 ati_remote->inbuf, ati_remote->inbuf_dma);
 718 
 719         usb_free_coherent(ati_remote->udev, DATA_BUFSIZE,
 720                 ati_remote->outbuf, ati_remote->outbuf_dma);
 721 }
 722 
 723 static void ati_remote_input_init(struct ati_remote *ati_remote)
 724 {
 725         struct input_dev *idev = ati_remote->idev;
 726         int i;
 727 
 728         idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 729         idev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
 730                 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
 731         idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 732         for (i = 0; ati_remote_tbl[i].kind != KIND_END; i++)
 733                 if (ati_remote_tbl[i].kind == KIND_LITERAL ||
 734                     ati_remote_tbl[i].kind == KIND_FILTERED)
 735                         __set_bit(ati_remote_tbl[i].code, idev->keybit);
 736 
 737         input_set_drvdata(idev, ati_remote);
 738 
 739         idev->open = ati_remote_input_open;
 740         idev->close = ati_remote_input_close;
 741 
 742         idev->name = ati_remote->mouse_name;
 743         idev->phys = ati_remote->mouse_phys;
 744 
 745         usb_to_input_id(ati_remote->udev, &idev->id);
 746         idev->dev.parent = &ati_remote->interface->dev;
 747 }
 748 
 749 static void ati_remote_rc_init(struct ati_remote *ati_remote)
 750 {
 751         struct rc_dev *rdev = ati_remote->rdev;
 752 
 753         rdev->priv = ati_remote;
 754         rdev->allowed_protocols = RC_PROTO_BIT_OTHER;
 755         rdev->driver_name = "ati_remote";
 756 
 757         rdev->open = ati_remote_rc_open;
 758         rdev->close = ati_remote_rc_close;
 759 
 760         rdev->device_name = ati_remote->rc_name;
 761         rdev->input_phys = ati_remote->rc_phys;
 762 
 763         usb_to_input_id(ati_remote->udev, &rdev->input_id);
 764         rdev->dev.parent = &ati_remote->interface->dev;
 765 }
 766 
 767 static int ati_remote_initialize(struct ati_remote *ati_remote)
 768 {
 769         struct usb_device *udev = ati_remote->udev;
 770         int pipe, maxp;
 771 
 772         init_waitqueue_head(&ati_remote->wait);
 773 
 774         /* Set up irq_urb */
 775         pipe = usb_rcvintpipe(udev, ati_remote->endpoint_in->bEndpointAddress);
 776         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 777         maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
 778 
 779         usb_fill_int_urb(ati_remote->irq_urb, udev, pipe, ati_remote->inbuf,
 780                          maxp, ati_remote_irq_in, ati_remote,
 781                          ati_remote->endpoint_in->bInterval);
 782         ati_remote->irq_urb->transfer_dma = ati_remote->inbuf_dma;
 783         ati_remote->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 784 
 785         /* Set up out_urb */
 786         pipe = usb_sndintpipe(udev, ati_remote->endpoint_out->bEndpointAddress);
 787         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 788         maxp = (maxp > DATA_BUFSIZE) ? DATA_BUFSIZE : maxp;
 789 
 790         usb_fill_int_urb(ati_remote->out_urb, udev, pipe, ati_remote->outbuf,
 791                          maxp, ati_remote_irq_out, ati_remote,
 792                          ati_remote->endpoint_out->bInterval);
 793         ati_remote->out_urb->transfer_dma = ati_remote->outbuf_dma;
 794         ati_remote->out_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 795 
 796         /* send initialization strings */
 797         if ((ati_remote_sendpacket(ati_remote, 0x8004, init1)) ||
 798             (ati_remote_sendpacket(ati_remote, 0x8007, init2))) {
 799                 dev_err(&ati_remote->interface->dev,
 800                          "Initializing ati_remote hardware failed.\n");
 801                 return -EIO;
 802         }
 803 
 804         return 0;
 805 }
 806 
 807 /*
 808  * ati_remote_probe
 809  */
 810 static int ati_remote_probe(struct usb_interface *interface,
 811         const struct usb_device_id *id)
 812 {
 813         struct usb_device *udev = interface_to_usbdev(interface);
 814         struct usb_host_interface *iface_host = interface->cur_altsetting;
 815         struct usb_endpoint_descriptor *endpoint_in, *endpoint_out;
 816         struct ati_receiver_type *type = (struct ati_receiver_type *)id->driver_info;
 817         struct ati_remote *ati_remote;
 818         struct input_dev *input_dev;
 819         struct rc_dev *rc_dev;
 820         int err = -ENOMEM;
 821 
 822         if (iface_host->desc.bNumEndpoints != 2) {
 823                 err("%s: Unexpected desc.bNumEndpoints\n", __func__);
 824                 return -ENODEV;
 825         }
 826 
 827         endpoint_in = &iface_host->endpoint[0].desc;
 828         endpoint_out = &iface_host->endpoint[1].desc;
 829 
 830         if (!usb_endpoint_is_int_in(endpoint_in)) {
 831                 err("%s: Unexpected endpoint_in\n", __func__);
 832                 return -ENODEV;
 833         }
 834         if (le16_to_cpu(endpoint_in->wMaxPacketSize) == 0) {
 835                 err("%s: endpoint_in message size==0? \n", __func__);
 836                 return -ENODEV;
 837         }
 838 
 839         ati_remote = kzalloc(sizeof (struct ati_remote), GFP_KERNEL);
 840         rc_dev = rc_allocate_device(RC_DRIVER_SCANCODE);
 841         if (!ati_remote || !rc_dev)
 842                 goto exit_free_dev_rdev;
 843 
 844         /* Allocate URB buffers, URBs */
 845         if (ati_remote_alloc_buffers(udev, ati_remote))
 846                 goto exit_free_buffers;
 847 
 848         ati_remote->endpoint_in = endpoint_in;
 849         ati_remote->endpoint_out = endpoint_out;
 850         ati_remote->udev = udev;
 851         ati_remote->rdev = rc_dev;
 852         ati_remote->interface = interface;
 853 
 854         usb_make_path(udev, ati_remote->rc_phys, sizeof(ati_remote->rc_phys));
 855         strscpy(ati_remote->mouse_phys, ati_remote->rc_phys,
 856                 sizeof(ati_remote->mouse_phys));
 857 
 858         strlcat(ati_remote->rc_phys, "/input0", sizeof(ati_remote->rc_phys));
 859         strlcat(ati_remote->mouse_phys, "/input1", sizeof(ati_remote->mouse_phys));
 860 
 861         snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name), "%s%s%s",
 862                 udev->manufacturer ?: "",
 863                 udev->manufacturer && udev->product ? " " : "",
 864                 udev->product ?: "");
 865 
 866         if (!strlen(ati_remote->rc_name))
 867                 snprintf(ati_remote->rc_name, sizeof(ati_remote->rc_name),
 868                         DRIVER_DESC "(%04x,%04x)",
 869                         le16_to_cpu(ati_remote->udev->descriptor.idVendor),
 870                         le16_to_cpu(ati_remote->udev->descriptor.idProduct));
 871 
 872         snprintf(ati_remote->mouse_name, sizeof(ati_remote->mouse_name),
 873                  "%s mouse", ati_remote->rc_name);
 874 
 875         rc_dev->map_name = RC_MAP_ATI_X10; /* default map */
 876 
 877         /* set default keymap according to receiver model */
 878         if (type) {
 879                 if (type->default_keymap)
 880                         rc_dev->map_name = type->default_keymap;
 881                 else if (type->get_default_keymap)
 882                         rc_dev->map_name = type->get_default_keymap(interface);
 883         }
 884 
 885         ati_remote_rc_init(ati_remote);
 886         mutex_init(&ati_remote->open_mutex);
 887 
 888         /* Device Hardware Initialization - fills in ati_remote->idev from udev. */
 889         err = ati_remote_initialize(ati_remote);
 890         if (err)
 891                 goto exit_kill_urbs;
 892 
 893         /* Set up and register rc device */
 894         err = rc_register_device(ati_remote->rdev);
 895         if (err)
 896                 goto exit_kill_urbs;
 897 
 898         /* Set up and register mouse input device */
 899         if (mouse) {
 900                 input_dev = input_allocate_device();
 901                 if (!input_dev) {
 902                         err = -ENOMEM;
 903                         goto exit_unregister_device;
 904                 }
 905 
 906                 ati_remote->idev = input_dev;
 907                 ati_remote_input_init(ati_remote);
 908                 err = input_register_device(input_dev);
 909 
 910                 if (err)
 911                         goto exit_free_input_device;
 912         }
 913 
 914         usb_set_intfdata(interface, ati_remote);
 915         return 0;
 916 
 917  exit_free_input_device:
 918         input_free_device(input_dev);
 919  exit_unregister_device:
 920         rc_unregister_device(rc_dev);
 921         rc_dev = NULL;
 922  exit_kill_urbs:
 923         usb_kill_urb(ati_remote->irq_urb);
 924         usb_kill_urb(ati_remote->out_urb);
 925  exit_free_buffers:
 926         ati_remote_free_buffers(ati_remote);
 927  exit_free_dev_rdev:
 928          rc_free_device(rc_dev);
 929         kfree(ati_remote);
 930         return err;
 931 }
 932 
 933 /*
 934  * ati_remote_disconnect
 935  */
 936 static void ati_remote_disconnect(struct usb_interface *interface)
 937 {
 938         struct ati_remote *ati_remote;
 939 
 940         ati_remote = usb_get_intfdata(interface);
 941         usb_set_intfdata(interface, NULL);
 942         if (!ati_remote) {
 943                 dev_warn(&interface->dev, "%s - null device?\n", __func__);
 944                 return;
 945         }
 946 
 947         usb_kill_urb(ati_remote->irq_urb);
 948         usb_kill_urb(ati_remote->out_urb);
 949         if (ati_remote->idev)
 950                 input_unregister_device(ati_remote->idev);
 951         rc_unregister_device(ati_remote->rdev);
 952         ati_remote_free_buffers(ati_remote);
 953         kfree(ati_remote);
 954 }
 955 
 956 /* usb specific object to register with the usb subsystem */
 957 static struct usb_driver ati_remote_driver = {
 958         .name         = "ati_remote",
 959         .probe        = ati_remote_probe,
 960         .disconnect   = ati_remote_disconnect,
 961         .id_table     = ati_remote_table,
 962 };
 963 
 964 module_usb_driver(ati_remote_driver);
 965 
 966 MODULE_AUTHOR(DRIVER_AUTHOR);
 967 MODULE_DESCRIPTION(DRIVER_DESC);
 968 MODULE_LICENSE("GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/media/rc/ati_remote.c

DEFINITIONS
