drivers/input/mouse/synaptics_usb.c

   1 /*
   2  * USB Synaptics device driver
   3  *
   4  *  Copyright (c) 2002 Rob Miller (rob@inpharmatica . co . uk)
   5  *  Copyright (c) 2003 Ron Lee (ron@debian.org)
   6  *      cPad driver for kernel 2.4
   7  *
   8  *  Copyright (c) 2004 Jan Steinhoff (cpad@jan-steinhoff . de)
   9  *  Copyright (c) 2004 Ron Lee (ron@debian.org)
  10  *      rewritten for kernel 2.6
  11  *
  12  *  cPad display character device part is not included. It can be found at
  13  *  http://jan-steinhoff.de/linux/synaptics-usb.html
  14  *
  15  * Bases on:    usb_skeleton.c v2.2 by Greg Kroah-Hartman
  16  *              drivers/hid/usbhid/usbmouse.c by Vojtech Pavlik
  17  *              drivers/input/mouse/synaptics.c by Peter Osterlund
  18  *
  19  * This program is free software; you can redistribute it and/or modify it
  20  * under the terms of the GNU General Public License as published by the Free
  21  * Software Foundation; either version 2 of the License, or (at your option)
  22  * any later version.
  23  *
  24  * Trademarks are the property of their respective owners.
  25  */
  26
  27 /*
  28  * There are three different types of Synaptics USB devices: Touchpads,
  29  * touchsticks (or trackpoints), and touchscreens. Touchpads are well supported
  30  * by this driver, touchstick support has not been tested much yet, and
  31  * touchscreens have not been tested at all.
  32  *
  33  * Up to three alternate settings are possible:
  34  *      setting 0: one int endpoint for relative movement (used by usbhid.ko)
  35  *      setting 1: one int endpoint for absolute finger position
  36  *      setting 2 (cPad only): one int endpoint for absolute finger position and
  37  *                 two bulk endpoints for the display (in/out)
  38  * This driver uses setting 1.
  39  */
  40
  41 #include <linux/kernel.h>
  42 #include <linux/init.h>
  43 #include <linux/slab.h>
  44 #include <linux/module.h>
  45 #include <linux/moduleparam.h>
  46 #include <linux/usb.h>
  47 #include <linux/input.h>
  48 #include <linux/usb/input.h>
  49
  50 #define USB_VENDOR_ID_SYNAPTICS 0x06cb
  51 #define USB_DEVICE_ID_SYNAPTICS_TP      0x0001  /* Synaptics USB TouchPad */
  52 #define USB_DEVICE_ID_SYNAPTICS_INT_TP  0x0002  /* Integrated USB TouchPad */
  53 #define USB_DEVICE_ID_SYNAPTICS_CPAD    0x0003  /* Synaptics cPad */
  54 #define USB_DEVICE_ID_SYNAPTICS_TS      0x0006  /* Synaptics TouchScreen */
  55 #define USB_DEVICE_ID_SYNAPTICS_STICK   0x0007  /* Synaptics USB Styk */
  56 #define USB_DEVICE_ID_SYNAPTICS_WP      0x0008  /* Synaptics USB WheelPad */
  57 #define USB_DEVICE_ID_SYNAPTICS_COMP_TP 0x0009  /* Composite USB TouchPad */
  58 #define USB_DEVICE_ID_SYNAPTICS_WTP     0x0010  /* Wireless TouchPad */
  59 #define USB_DEVICE_ID_SYNAPTICS_DPAD    0x0013  /* DisplayPad */
  60
  61 #define SYNUSB_TOUCHPAD                 (1 << 0)
  62 #define SYNUSB_STICK                    (1 << 1)
  63 #define SYNUSB_TOUCHSCREEN              (1 << 2)
  64 #define SYNUSB_AUXDISPLAY               (1 << 3) /* For cPad */
  65 #define SYNUSB_COMBO                    (1 << 4) /* Composite device (TP + stick) */
  66 #define SYNUSB_IO_ALWAYS                (1 << 5)
  67
  68 #define USB_DEVICE_SYNAPTICS(prod, kind)                \
  69         USB_DEVICE(USB_VENDOR_ID_SYNAPTICS,             \
  70                    USB_DEVICE_ID_SYNAPTICS_##prod),     \
  71         .driver_info = (kind),
  72
  73 #define SYNUSB_RECV_SIZE        8
  74
  75 #define XMIN_NOMINAL            1472
  76 #define XMAX_NOMINAL            5472
  77 #define YMIN_NOMINAL            1408
  78 #define YMAX_NOMINAL            4448
  79
  80 struct synusb {
  81         struct usb_device *udev;
  82         struct usb_interface *intf;
  83         struct urb *urb;
  84         unsigned char *data;
  85
  86         /* input device related data structures */
  87         struct input_dev *input;
  88         char name[128];
  89         char phys[64];
  90
  91         /* characteristics of the device */
  92         unsigned long flags;
  93 };
  94
  95 static void synusb_report_buttons(struct synusb *synusb)
  96 {
  97         struct input_dev *input_dev = synusb->input;
  98
  99         input_report_key(input_dev, BTN_LEFT, synusb->data[1] & 0x04);
 100         input_report_key(input_dev, BTN_RIGHT, synusb->data[1] & 0x01);
 101         input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x02);
 102 }
 103
 104 static void synusb_report_stick(struct synusb *synusb)
 105 {
 106         struct input_dev *input_dev = synusb->input;
 107         int x, y;
 108         unsigned int pressure;
 109
 110         pressure = synusb->data[6];
 111         x = (s16)(be16_to_cpup((__be16 *)&synusb->data[2]) << 3) >> 7;
 112         y = (s16)(be16_to_cpup((__be16 *)&synusb->data[4]) << 3) >> 7;
 113
 114         if (pressure > 0) {
 115                 input_report_rel(input_dev, REL_X, x);
 116                 input_report_rel(input_dev, REL_Y, -y);
 117         }
 118
 119         input_report_abs(input_dev, ABS_PRESSURE, pressure);
 120
 121         synusb_report_buttons(synusb);
 122
 123         input_sync(input_dev);
 124 }
 125
 126 static void synusb_report_touchpad(struct synusb *synusb)
 127 {
 128         struct input_dev *input_dev = synusb->input;
 129         unsigned int num_fingers, tool_width;
 130         unsigned int x, y;
 131         unsigned int pressure, w;
 132
 133         pressure = synusb->data[6];
 134         x = be16_to_cpup((__be16 *)&synusb->data[2]);
 135         y = be16_to_cpup((__be16 *)&synusb->data[4]);
 136         w = synusb->data[0] & 0x0f;
 137
 138         if (pressure > 0) {
 139                 num_fingers = 1;
 140                 tool_width = 5;
 141                 switch (w) {
 142                 case 0 ... 1:
 143                         num_fingers = 2 + w;
 144                         break;
 145
 146                 case 2:                 /* pen, pretend its a finger */
 147                         break;
 148
 149                 case 4 ... 15:
 150                         tool_width = w;
 151                         break;
 152                 }
 153         } else {
 154                 num_fingers = 0;
 155                 tool_width = 0;
 156         }
 157
 158         /*
 159          * Post events
 160          * BTN_TOUCH has to be first as mousedev relies on it when doing
 161          * absolute -> relative conversion
 162          */
 163
 164         if (pressure > 30)
 165                 input_report_key(input_dev, BTN_TOUCH, 1);
 166         if (pressure < 25)
 167                 input_report_key(input_dev, BTN_TOUCH, 0);
 168
 169         if (num_fingers > 0) {
 170                 input_report_abs(input_dev, ABS_X, x);
 171                 input_report_abs(input_dev, ABS_Y,
 172                                  YMAX_NOMINAL + YMIN_NOMINAL - y);
 173         }
 174
 175         input_report_abs(input_dev, ABS_PRESSURE, pressure);
 176         input_report_abs(input_dev, ABS_TOOL_WIDTH, tool_width);
 177
 178         input_report_key(input_dev, BTN_TOOL_FINGER, num_fingers == 1);
 179         input_report_key(input_dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
 180         input_report_key(input_dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
 181
 182         synusb_report_buttons(synusb);
 183         if (synusb->flags & SYNUSB_AUXDISPLAY)
 184                 input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x08);
 185
 186         input_sync(input_dev);
 187 }
 188
 189 static void synusb_irq(struct urb *urb)
 190 {
 191         struct synusb *synusb = urb->context;
 192         int error;
 193
 194         /* Check our status in case we need to bail out early. */
 195         switch (urb->status) {
 196         case 0:
 197                 usb_mark_last_busy(synusb->udev);
 198                 break;
 199
 200         /* Device went away so don't keep trying to read from it. */
 201         case -ECONNRESET:
 202         case -ENOENT:
 203         case -ESHUTDOWN:
 204                 return;
 205
 206         default:
 207                 goto resubmit;
 208                 break;
 209         }
 210
 211         if (synusb->flags & SYNUSB_STICK)
 212                 synusb_report_stick(synusb);
 213         else
 214                 synusb_report_touchpad(synusb);
 215
 216 resubmit:
 217         error = usb_submit_urb(urb, GFP_ATOMIC);
 218         if (error && error != -EPERM)
 219                 dev_err(&synusb->intf->dev,
 220                         "%s - usb_submit_urb failed with result: %d",
 221                         __func__, error);
 222 }
 223
 224 static struct usb_endpoint_descriptor *
 225 synusb_get_in_endpoint(struct usb_host_interface *iface)
 226 {
 227
 228         struct usb_endpoint_descriptor *endpoint;
 229         int i;
 230
 231         for (i = 0; i < iface->desc.bNumEndpoints; ++i) {
 232                 endpoint = &iface->endpoint[i].desc;
 233
 234                 if (usb_endpoint_is_int_in(endpoint)) {
 235                         /* we found our interrupt in endpoint */
 236                         return endpoint;
 237                 }
 238         }
 239
 240         return NULL;
 241 }
 242
 243 static int synusb_open(struct input_dev *dev)
 244 {
 245         struct synusb *synusb = input_get_drvdata(dev);
 246         int retval;
 247
 248         retval = usb_autopm_get_interface(synusb->intf);
 249         if (retval) {
 250                 dev_err(&synusb->intf->dev,
 251                         "%s - usb_autopm_get_interface failed, error: %d\n",
 252                         __func__, retval);
 253                 return retval;
 254         }
 255
 256         retval = usb_submit_urb(synusb->urb, GFP_KERNEL);
 257         if (retval) {
 258                 dev_err(&synusb->intf->dev,
 259                         "%s - usb_submit_urb failed, error: %d\n",
 260                         __func__, retval);
 261                 retval = -EIO;
 262                 goto out;
 263         }
 264
 265         synusb->intf->needs_remote_wakeup = 1;
 266
 267 out:
 268         usb_autopm_put_interface(synusb->intf);
 269         return retval;
 270 }
 271
 272 static void synusb_close(struct input_dev *dev)
 273 {
 274         struct synusb *synusb = input_get_drvdata(dev);
 275         int autopm_error;
 276
 277         autopm_error = usb_autopm_get_interface(synusb->intf);
 278
 279         usb_kill_urb(synusb->urb);
 280         synusb->intf->needs_remote_wakeup = 0;
 281
 282         if (!autopm_error)
 283                 usb_autopm_put_interface(synusb->intf);
 284 }
 285
 286 static int synusb_probe(struct usb_interface *intf,
 287                         const struct usb_device_id *id)
 288 {
 289         struct usb_device *udev = interface_to_usbdev(intf);
 290         struct usb_endpoint_descriptor *ep;
 291         struct synusb *synusb;
 292         struct input_dev *input_dev;
 293         unsigned int intf_num = intf->cur_altsetting->desc.bInterfaceNumber;
 294         unsigned int altsetting = min(intf->num_altsetting, 1U);
 295         int error;
 296
 297         error = usb_set_interface(udev, intf_num, altsetting);
 298         if (error) {
 299                 dev_err(&udev->dev,
 300                         "Can not set alternate setting to %i, error: %i",
 301                         altsetting, error);
 302                 return error;
 303         }
 304
 305         ep = synusb_get_in_endpoint(intf->cur_altsetting);
 306         if (!ep)
 307                 return -ENODEV;
 308
 309         synusb = kzalloc(sizeof(*synusb), GFP_KERNEL);
 310         input_dev = input_allocate_device();
 311         if (!synusb || !input_dev) {
 312                 error = -ENOMEM;
 313                 goto err_free_mem;
 314         }
 315
 316         synusb->udev = udev;
 317         synusb->intf = intf;
 318         synusb->input = input_dev;
 319
 320         synusb->flags = id->driver_info;
 321         if (synusb->flags & SYNUSB_COMBO) {
 322                 /*
 323                  * This is a combo device, we need to set proper
 324                  * capability, depending on the interface.
 325                  */
 326                 synusb->flags |= intf_num == 1 ?
 327                                         SYNUSB_STICK : SYNUSB_TOUCHPAD;
 328         }
 329
 330         synusb->urb = usb_alloc_urb(0, GFP_KERNEL);
 331         if (!synusb->urb) {
 332                 error = -ENOMEM;
 333                 goto err_free_mem;
 334         }
 335
 336         synusb->data = usb_alloc_coherent(udev, SYNUSB_RECV_SIZE, GFP_KERNEL,
 337                                           &synusb->urb->transfer_dma);
 338         if (!synusb->data) {
 339                 error = -ENOMEM;
 340                 goto err_free_urb;
 341         }
 342
 343         usb_fill_int_urb(synusb->urb, udev,
 344                          usb_rcvintpipe(udev, ep->bEndpointAddress),
 345                          synusb->data, SYNUSB_RECV_SIZE,
 346                          synusb_irq, synusb,
 347                          ep->bInterval);
 348         synusb->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 349
 350         if (udev->manufacturer)
 351                 strlcpy(synusb->name, udev->manufacturer,
 352                         sizeof(synusb->name));
 353
 354         if (udev->product) {
 355                 if (udev->manufacturer)
 356                         strlcat(synusb->name, " ", sizeof(synusb->name));
 357                 strlcat(synusb->name, udev->product, sizeof(synusb->name));
 358         }
 359
 360         if (!strlen(synusb->name))
 361                 snprintf(synusb->name, sizeof(synusb->name),
 362                          "USB Synaptics Device %04x:%04x",
 363                          le16_to_cpu(udev->descriptor.idVendor),
 364                          le16_to_cpu(udev->descriptor.idProduct));
 365
 366         if (synusb->flags & SYNUSB_STICK)
 367                 strlcat(synusb->name, " (Stick) ", sizeof(synusb->name));
 368
 369         usb_make_path(udev, synusb->phys, sizeof(synusb->phys));
 370         strlcat(synusb->phys, "/input0", sizeof(synusb->phys));
 371
 372         input_dev->name = synusb->name;
 373         input_dev->phys = synusb->phys;
 374         usb_to_input_id(udev, &input_dev->id);
 375         input_dev->dev.parent = &synusb->intf->dev;
 376
 377         if (!(synusb->flags & SYNUSB_IO_ALWAYS)) {
 378                 input_dev->open = synusb_open;
 379                 input_dev->close = synusb_close;
 380         }
 381
 382         input_set_drvdata(input_dev, synusb);
 383
 384         __set_bit(EV_ABS, input_dev->evbit);
 385         __set_bit(EV_KEY, input_dev->evbit);
 386
 387         if (synusb->flags & SYNUSB_STICK) {
 388                 __set_bit(EV_REL, input_dev->evbit);
 389                 __set_bit(REL_X, input_dev->relbit);
 390                 __set_bit(REL_Y, input_dev->relbit);
 391                 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 127, 0, 0);
 392         } else {
 393                 input_set_abs_params(input_dev, ABS_X,
 394                                      XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
 395                 input_set_abs_params(input_dev, ABS_Y,
 396                                      YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
 397                 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
 398                 input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
 399                 __set_bit(BTN_TOUCH, input_dev->keybit);
 400                 __set_bit(BTN_TOOL_FINGER, input_dev->keybit);
 401                 __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
 402                 __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
 403         }
 404
 405         __set_bit(BTN_LEFT, input_dev->keybit);
 406         __set_bit(BTN_RIGHT, input_dev->keybit);
 407         __set_bit(BTN_MIDDLE, input_dev->keybit);
 408
 409         usb_set_intfdata(intf, synusb);
 410
 411         if (synusb->flags & SYNUSB_IO_ALWAYS) {
 412                 error = synusb_open(input_dev);
 413                 if (error)
 414                         goto err_free_dma;
 415         }
 416
 417         error = input_register_device(input_dev);
 418         if (error) {
 419                 dev_err(&udev->dev,
 420                         "Failed to register input device, error %d\n",
 421                         error);
 422                 goto err_stop_io;
 423         }
 424
 425         return 0;
 426
 427 err_stop_io:
 428         if (synusb->flags & SYNUSB_IO_ALWAYS)
 429                 synusb_close(synusb->input);
 430 err_free_dma:
 431         usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data,
 432                           synusb->urb->transfer_dma);
 433 err_free_urb:
 434         usb_free_urb(synusb->urb);
 435 err_free_mem:
 436         input_free_device(input_dev);
 437         kfree(synusb);
 438         usb_set_intfdata(intf, NULL);
 439
 440         return error;
 441 }
 442
 443 static void synusb_disconnect(struct usb_interface *intf)
 444 {
 445         struct synusb *synusb = usb_get_intfdata(intf);
 446         struct usb_device *udev = interface_to_usbdev(intf);
 447
 448         if (synusb->flags & SYNUSB_IO_ALWAYS)
 449                 synusb_close(synusb->input);
 450
 451         input_unregister_device(synusb->input);
 452
 453         usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data,
 454                           synusb->urb->transfer_dma);
 455         usb_free_urb(synusb->urb);
 456         kfree(synusb);
 457
 458         usb_set_intfdata(intf, NULL);
 459 }
 460
 461 static int synusb_suspend(struct usb_interface *intf, pm_message_t message)
 462 {
 463         struct synusb *synusb = usb_get_intfdata(intf);
 464         struct input_dev *input_dev = synusb->input;
 465
 466         mutex_lock(&input_dev->mutex);
 467         usb_kill_urb(synusb->urb);
 468         mutex_unlock(&input_dev->mutex);
 469
 470         return 0;
 471 }
 472
 473 static int synusb_resume(struct usb_interface *intf)
 474 {
 475         struct synusb *synusb = usb_get_intfdata(intf);
 476         struct input_dev *input_dev = synusb->input;
 477         int retval = 0;
 478
 479         mutex_lock(&input_dev->mutex);
 480
 481         if ((input_dev->users || (synusb->flags & SYNUSB_IO_ALWAYS)) &&
 482             usb_submit_urb(synusb->urb, GFP_NOIO) < 0) {
 483                 retval = -EIO;
 484         }
 485
 486         mutex_unlock(&input_dev->mutex);
 487
 488         return retval;
 489 }
 490
 491 static int synusb_pre_reset(struct usb_interface *intf)
 492 {
 493         struct synusb *synusb = usb_get_intfdata(intf);
 494         struct input_dev *input_dev = synusb->input;
 495
 496         mutex_lock(&input_dev->mutex);
 497         usb_kill_urb(synusb->urb);
 498
 499         return 0;
 500 }
 501
 502 static int synusb_post_reset(struct usb_interface *intf)
 503 {
 504         struct synusb *synusb = usb_get_intfdata(intf);
 505         struct input_dev *input_dev = synusb->input;
 506         int retval = 0;
 507
 508         if ((input_dev->users || (synusb->flags & SYNUSB_IO_ALWAYS)) &&
 509             usb_submit_urb(synusb->urb, GFP_NOIO) < 0) {
 510                 retval = -EIO;
 511         }
 512
 513         mutex_unlock(&input_dev->mutex);
 514
 515         return retval;
 516 }
 517
 518 static int synusb_reset_resume(struct usb_interface *intf)
 519 {
 520         return synusb_resume(intf);
 521 }
 522
 523 static struct usb_device_id synusb_idtable[] = {
 524         { USB_DEVICE_SYNAPTICS(TP, SYNUSB_TOUCHPAD) },
 525         { USB_DEVICE_SYNAPTICS(INT_TP, SYNUSB_TOUCHPAD) },
 526         { USB_DEVICE_SYNAPTICS(CPAD,
 527                 SYNUSB_TOUCHPAD | SYNUSB_AUXDISPLAY | SYNUSB_IO_ALWAYS) },
 528         { USB_DEVICE_SYNAPTICS(TS, SYNUSB_TOUCHSCREEN) },
 529         { USB_DEVICE_SYNAPTICS(STICK, SYNUSB_STICK) },
 530         { USB_DEVICE_SYNAPTICS(WP, SYNUSB_TOUCHPAD) },
 531         { USB_DEVICE_SYNAPTICS(COMP_TP, SYNUSB_COMBO) },
 532         { USB_DEVICE_SYNAPTICS(WTP, SYNUSB_TOUCHPAD) },
 533         { USB_DEVICE_SYNAPTICS(DPAD, SYNUSB_TOUCHPAD) },
 534         { }
 535 };
 536 MODULE_DEVICE_TABLE(usb, synusb_idtable);
 537
 538 static struct usb_driver synusb_driver = {
 539         .name           = "synaptics_usb",
 540         .probe          = synusb_probe,
 541         .disconnect     = synusb_disconnect,
 542         .id_table       = synusb_idtable,
 543         .suspend        = synusb_suspend,
 544         .resume         = synusb_resume,
 545         .pre_reset      = synusb_pre_reset,
 546         .post_reset     = synusb_post_reset,
 547         .reset_resume   = synusb_reset_resume,
 548         .supports_autosuspend = 1,
 549 };
 550
 551 static int __init synusb_init(void)
 552 {
 553         return usb_register(&synusb_driver);
 554 }
 555
 556 static void __exit synusb_exit(void)
 557 {
 558         usb_deregister(&synusb_driver);
 559 }
 560
 561 module_init(synusb_init);
 562 module_exit(synusb_exit);
 563
 564 MODULE_AUTHOR("Rob Miller <rob@inpharmatica.co.uk>, "
 565               "Ron Lee <ron@debian.org>, "
 566               "Jan Steinhoff <cpad@jan-steinhoff.de>");
 567 MODULE_DESCRIPTION("Synaptics USB device driver");
 568 MODULE_LICENSE("GPL");