1/* 2 * drivers/input/tablet/wacom_sys.c 3 * 4 * USB Wacom tablet support - system specific code 5 */ 6 7/* 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 */ 13 14#include "wacom_wac.h" 15#include "wacom.h" 16 17/* defines to get HID report descriptor */ 18#define HID_DEVICET_HID (USB_TYPE_CLASS | 0x01) 19#define HID_DEVICET_REPORT (USB_TYPE_CLASS | 0x02) 20#define HID_USAGE_UNDEFINED 0x00 21#define HID_USAGE_PAGE 0x05 22#define HID_USAGE_PAGE_DIGITIZER 0x0d 23#define HID_USAGE_PAGE_DESKTOP 0x01 24#define HID_USAGE 0x09 25#define HID_USAGE_X 0x30 26#define HID_USAGE_Y 0x31 27#define HID_USAGE_X_TILT 0x3d 28#define HID_USAGE_Y_TILT 0x3e 29#define HID_USAGE_FINGER 0x22 30#define HID_USAGE_STYLUS 0x20 31#define HID_COLLECTION 0xa1 32#define HID_COLLECTION_LOGICAL 0x02 33#define HID_COLLECTION_END 0xc0 34 35enum { 36 WCM_UNDEFINED = 0, 37 WCM_DESKTOP, 38 WCM_DIGITIZER, 39}; 40 41struct hid_descriptor { 42 struct usb_descriptor_header header; 43 __le16 bcdHID; 44 u8 bCountryCode; 45 u8 bNumDescriptors; 46 u8 bDescriptorType; 47 __le16 wDescriptorLength; 48} __attribute__ ((packed)); 49 50/* defines to get/set USB message */ 51#define USB_REQ_GET_REPORT 0x01 52#define USB_REQ_SET_REPORT 0x09 53 54#define WAC_HID_FEATURE_REPORT 0x03 55#define WAC_MSG_RETRIES 5 56 57#define WAC_CMD_LED_CONTROL 0x20 58#define WAC_CMD_ICON_START 0x21 59#define WAC_CMD_ICON_XFER 0x23 60#define WAC_CMD_RETRIES 10 61 62static int wacom_get_report(struct usb_interface *intf, u8 type, u8 id, 63 void *buf, size_t size, unsigned int retries) 64{ 65 struct usb_device *dev = interface_to_usbdev(intf); 66 int retval; 67 68 do { 69 retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 70 USB_REQ_GET_REPORT, 71 USB_DIR_IN | USB_TYPE_CLASS | 72 USB_RECIP_INTERFACE, 73 (type << 8) + id, 74 intf->altsetting[0].desc.bInterfaceNumber, 75 buf, size, 100); 76 } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries); 77 78 return retval; 79} 80 81static int wacom_set_report(struct usb_interface *intf, u8 type, u8 id, 82 void *buf, size_t size, unsigned int retries) 83{ 84 struct usb_device *dev = interface_to_usbdev(intf); 85 int retval; 86 87 do { 88 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 89 USB_REQ_SET_REPORT, 90 USB_TYPE_CLASS | USB_RECIP_INTERFACE, 91 (type << 8) + id, 92 intf->altsetting[0].desc.bInterfaceNumber, 93 buf, size, 1000); 94 } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries); 95 96 return retval; 97} 98 99static void wacom_sys_irq(struct urb *urb) 100{ 101 struct wacom *wacom = urb->context; 102 int retval; 103 104 switch (urb->status) { 105 case 0: 106 /* success */ 107 break; 108 case -ECONNRESET: 109 case -ENOENT: 110 case -ESHUTDOWN: 111 /* this urb is terminated, clean up */ 112 dbg("%s - urb shutting down with status: %d", __func__, urb->status); 113 return; 114 default: 115 dbg("%s - nonzero urb status received: %d", __func__, urb->status); 116 goto exit; 117 } 118 119 wacom_wac_irq(&wacom->wacom_wac, urb->actual_length); 120 121 exit: 122 usb_mark_last_busy(wacom->usbdev); 123 retval = usb_submit_urb(urb, GFP_ATOMIC); 124 if (retval) 125 err ("%s - usb_submit_urb failed with result %d", 126 __func__, retval); 127} 128 129static int wacom_open(struct input_dev *dev) 130{ 131 struct wacom *wacom = input_get_drvdata(dev); 132 int retval = 0; 133 134 if (usb_autopm_get_interface(wacom->intf) < 0) 135 return -EIO; 136 137 mutex_lock(&wacom->lock); 138 139 if (usb_submit_urb(wacom->irq, GFP_KERNEL)) { 140 retval = -EIO; 141 goto out; 142 } 143 144 wacom->open = true; 145 wacom->intf->needs_remote_wakeup = 1; 146 147out: 148 mutex_unlock(&wacom->lock); 149 usb_autopm_put_interface(wacom->intf); 150 return retval; 151} 152 153static void wacom_close(struct input_dev *dev) 154{ 155 struct wacom *wacom = input_get_drvdata(dev); 156 int autopm_error; 157 158 autopm_error = usb_autopm_get_interface(wacom->intf); 159 160 mutex_lock(&wacom->lock); 161 usb_kill_urb(wacom->irq); 162 wacom->open = false; 163 wacom->intf->needs_remote_wakeup = 0; 164 mutex_unlock(&wacom->lock); 165 166 if (!autopm_error) 167 usb_autopm_put_interface(wacom->intf); 168} 169 170/* 171 * Static values for max X/Y and resolution of Pen interface is stored in 172 * features. This mean physical size of active area can be computed. 173 * This is useful to do when Pen and Touch have same active area of tablet. 174 * This means for Touch device, we only need to find max X/Y value and we 175 * have enough information to compute resolution of touch. 176 */ 177static void wacom_set_phy_from_res(struct wacom_features *features) 178{ 179 features->x_phy = (features->x_max * 100) / features->x_resolution; 180 features->y_phy = (features->y_max * 100) / features->y_resolution; 181} 182 183static int wacom_parse_logical_collection(unsigned char *report, 184 struct wacom_features *features) 185{ 186 int length = 0; 187 188 if (features->type == BAMBOO_PT) { 189 190 /* Logical collection is only used by 3rd gen Bamboo Touch */ 191 features->pktlen = WACOM_PKGLEN_BBTOUCH3; 192 features->device_type = BTN_TOOL_FINGER; 193 194 wacom_set_phy_from_res(features); 195 196 features->x_max = features->y_max = 197 get_unaligned_le16(&report[10]); 198 199 length = 11; 200 } 201 return length; 202} 203 204/* 205 * Interface Descriptor of wacom devices can be incomplete and 206 * inconsistent so wacom_features table is used to store stylus 207 * device's packet lengths, various maximum values, and tablet 208 * resolution based on product ID's. 209 * 210 * For devices that contain 2 interfaces, wacom_features table is 211 * inaccurate for the touch interface. Since the Interface Descriptor 212 * for touch interfaces has pretty complete data, this function exists 213 * to query tablet for this missing information instead of hard coding in 214 * an additional table. 215 * 216 * A typical Interface Descriptor for a stylus will contain a 217 * boot mouse application collection that is not of interest and this 218 * function will ignore it. 219 * 220 * It also contains a digitizer application collection that also is not 221 * of interest since any information it contains would be duplicate 222 * of what is in wacom_features. Usually it defines a report of an array 223 * of bytes that could be used as max length of the stylus packet returned. 224 * If it happens to define a Digitizer-Stylus Physical Collection then 225 * the X and Y logical values contain valid data but it is ignored. 226 * 227 * A typical Interface Descriptor for a touch interface will contain a 228 * Digitizer-Finger Physical Collection which will define both logical 229 * X/Y maximum as well as the physical size of tablet. Since touch 230 * interfaces haven't supported pressure or distance, this is enough 231 * information to override invalid values in the wacom_features table. 232 * 233 * 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical 234 * Collection. Instead they define a Logical Collection with a single 235 * Logical Maximum for both X and Y. 236 */ 237static int wacom_parse_hid(struct usb_interface *intf, 238 struct hid_descriptor *hid_desc, 239 struct wacom_features *features) 240{ 241 struct usb_device *dev = interface_to_usbdev(intf); 242 char limit = 0; 243 /* result has to be defined as int for some devices */ 244 int result = 0; 245 int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0; 246 unsigned char *report; 247 248 report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL); 249 if (!report) 250 return -ENOMEM; 251 252 /* retrive report descriptors */ 253 do { 254 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 255 USB_REQ_GET_DESCRIPTOR, 256 USB_RECIP_INTERFACE | USB_DIR_IN, 257 HID_DEVICET_REPORT << 8, 258 intf->altsetting[0].desc.bInterfaceNumber, /* interface */ 259 report, 260 hid_desc->wDescriptorLength, 261 5000); /* 5 secs */ 262 } while (result < 0 && limit++ < WAC_MSG_RETRIES); 263 264 /* No need to parse the Descriptor. It isn't an error though */ 265 if (result < 0) 266 goto out; 267 268 for (i = 0; i < hid_desc->wDescriptorLength; i++) { 269 270 switch (report[i]) { 271 case HID_USAGE_PAGE: 272 switch (report[i + 1]) { 273 case HID_USAGE_PAGE_DIGITIZER: 274 usage = WCM_DIGITIZER; 275 i++; 276 break; 277 278 case HID_USAGE_PAGE_DESKTOP: 279 usage = WCM_DESKTOP; 280 i++; 281 break; 282 } 283 break; 284 285 case HID_USAGE: 286 switch (report[i + 1]) { 287 case HID_USAGE_X: 288 if (usage == WCM_DESKTOP) { 289 if (finger) { 290 features->device_type = BTN_TOOL_FINGER; 291 if (features->type == TABLETPC2FG) { 292 /* need to reset back */ 293 features->pktlen = WACOM_PKGLEN_TPC2FG; 294 } 295 if (features->type == BAMBOO_PT) { 296 /* need to reset back */ 297 features->pktlen = WACOM_PKGLEN_BBTOUCH; 298 features->x_phy = 299 get_unaligned_le16(&report[i + 5]); 300 features->x_max = 301 get_unaligned_le16(&report[i + 8]); 302 i += 15; 303 } else { 304 features->x_max = 305 get_unaligned_le16(&report[i + 3]); 306 features->x_phy = 307 get_unaligned_le16(&report[i + 6]); 308 features->unit = report[i + 9]; 309 features->unitExpo = report[i + 11]; 310 i += 12; 311 } 312 } else if (pen) { 313 /* penabled only accepts exact bytes of data */ 314 if (features->type == TABLETPC2FG) 315 features->pktlen = WACOM_PKGLEN_GRAPHIRE; 316 features->device_type = BTN_TOOL_PEN; 317 features->x_max = 318 get_unaligned_le16(&report[i + 3]); 319 i += 4; 320 } 321 } 322 break; 323 324 case HID_USAGE_Y: 325 if (usage == WCM_DESKTOP) { 326 if (finger) { 327 features->device_type = BTN_TOOL_FINGER; 328 if (features->type == TABLETPC2FG) { 329 /* need to reset back */ 330 features->pktlen = WACOM_PKGLEN_TPC2FG; 331 features->y_max = 332 get_unaligned_le16(&report[i + 3]); 333 features->y_phy = 334 get_unaligned_le16(&report[i + 6]); 335 i += 7; 336 } else if (features->type == BAMBOO_PT) { 337 /* need to reset back */ 338 features->pktlen = WACOM_PKGLEN_BBTOUCH; 339 features->y_phy = 340 get_unaligned_le16(&report[i + 3]); 341 features->y_max = 342 get_unaligned_le16(&report[i + 6]); 343 i += 12; 344 } else { 345 features->y_max = 346 features->x_max; 347 features->y_phy = 348 get_unaligned_le16(&report[i + 3]); 349 i += 4; 350 } 351 } else if (pen) { 352 /* penabled only accepts exact bytes of data */ 353 if (features->type == TABLETPC2FG) 354 features->pktlen = WACOM_PKGLEN_GRAPHIRE; 355 features->device_type = BTN_TOOL_PEN; 356 features->y_max = 357 get_unaligned_le16(&report[i + 3]); 358 i += 4; 359 } 360 } 361 break; 362 363 case HID_USAGE_FINGER: 364 finger = 1; 365 i++; 366 break; 367 368 /* 369 * Requiring Stylus Usage will ignore boot mouse 370 * X/Y values and some cases of invalid Digitizer X/Y 371 * values commonly reported. 372 */ 373 case HID_USAGE_STYLUS: 374 pen = 1; 375 i++; 376 break; 377 } 378 break; 379 380 case HID_COLLECTION_END: 381 /* reset UsagePage and Finger */ 382 finger = usage = 0; 383 break; 384 385 case HID_COLLECTION: 386 i++; 387 switch (report[i]) { 388 case HID_COLLECTION_LOGICAL: 389 i += wacom_parse_logical_collection(&report[i], 390 features); 391 break; 392 } 393 break; 394 } 395 } 396 397 out: 398 result = 0; 399 kfree(report); 400 return result; 401} 402 403static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features) 404{ 405 unsigned char *rep_data; 406 int limit = 0, report_id = 2; 407 int error = -ENOMEM; 408 409 rep_data = kmalloc(4, GFP_KERNEL); 410 if (!rep_data) 411 return error; 412 413 /* ask to report tablet data if it is MT Tablet PC or 414 * not a Tablet PC */ 415 if (features->type == TABLETPC2FG) { 416 do { 417 rep_data[0] = 3; 418 rep_data[1] = 4; 419 rep_data[2] = 0; 420 rep_data[3] = 0; 421 report_id = 3; 422 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT, 423 report_id, rep_data, 4, 1); 424 if (error >= 0) 425 error = wacom_get_report(intf, 426 WAC_HID_FEATURE_REPORT, 427 report_id, rep_data, 4, 1); 428 } while ((error < 0 || rep_data[1] != 4) && limit++ < WAC_MSG_RETRIES); 429 } else if (features->type != TABLETPC && 430 features->type != WIRELESS && 431 features->device_type == BTN_TOOL_PEN) { 432 do { 433 rep_data[0] = 2; 434 rep_data[1] = 2; 435 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT, 436 report_id, rep_data, 2, 1); 437 if (error >= 0) 438 error = wacom_get_report(intf, 439 WAC_HID_FEATURE_REPORT, 440 report_id, rep_data, 2, 1); 441 } while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES); 442 } 443 444 kfree(rep_data); 445 446 return error < 0 ? error : 0; 447} 448 449static int wacom_retrieve_hid_descriptor(struct usb_interface *intf, 450 struct wacom_features *features) 451{ 452 int error = 0; 453 struct usb_host_interface *interface = intf->cur_altsetting; 454 struct hid_descriptor *hid_desc; 455 456 /* default features */ 457 features->device_type = BTN_TOOL_PEN; 458 features->x_fuzz = 4; 459 features->y_fuzz = 4; 460 features->pressure_fuzz = 0; 461 features->distance_fuzz = 0; 462 463 /* 464 * The wireless device HID is basic and layout conflicts with 465 * other tablets (monitor and touch interface can look like pen). 466 * Skip the query for this type and modify defaults based on 467 * interface number. 468 */ 469 if (features->type == WIRELESS) { 470 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) { 471 features->device_type = 0; 472 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) { 473 features->device_type = BTN_TOOL_DOUBLETAP; 474 features->pktlen = WACOM_PKGLEN_BBTOUCH3; 475 } 476 } 477 478 /* only Tablet PCs and Bamboo P&T need to retrieve the info */ 479 if ((features->type != TABLETPC) && (features->type != TABLETPC2FG) && 480 (features->type != BAMBOO_PT)) 481 goto out; 482 483 if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) { 484 if (usb_get_extra_descriptor(&interface->endpoint[0], 485 HID_DEVICET_REPORT, &hid_desc)) { 486 printk("wacom: can not retrieve extra class descriptor\n"); 487 error = 1; 488 goto out; 489 } 490 } 491 error = wacom_parse_hid(intf, hid_desc, features); 492 if (error) 493 goto out; 494 495 out: 496 return error; 497} 498 499struct wacom_usbdev_data { 500 struct list_head list; 501 struct kref kref; 502 struct usb_device *dev; 503 struct wacom_shared shared; 504}; 505 506static LIST_HEAD(wacom_udev_list); 507static DEFINE_MUTEX(wacom_udev_list_lock); 508 509static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev) 510{ 511 struct wacom_usbdev_data *data; 512 513 list_for_each_entry(data, &wacom_udev_list, list) { 514 if (data->dev == dev) { 515 kref_get(&data->kref); 516 return data; 517 } 518 } 519 520 return NULL; 521} 522 523static int wacom_add_shared_data(struct wacom_wac *wacom, 524 struct usb_device *dev) 525{ 526 struct wacom_usbdev_data *data; 527 int retval = 0; 528 529 mutex_lock(&wacom_udev_list_lock); 530 531 data = wacom_get_usbdev_data(dev); 532 if (!data) { 533 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL); 534 if (!data) { 535 retval = -ENOMEM; 536 goto out; 537 } 538 539 kref_init(&data->kref); 540 data->dev = dev; 541 list_add_tail(&data->list, &wacom_udev_list); 542 } 543 544 wacom->shared = &data->shared; 545 546out: 547 mutex_unlock(&wacom_udev_list_lock); 548 return retval; 549} 550 551static void wacom_release_shared_data(struct kref *kref) 552{ 553 struct wacom_usbdev_data *data = 554 container_of(kref, struct wacom_usbdev_data, kref); 555 556 mutex_lock(&wacom_udev_list_lock); 557 list_del(&data->list); 558 mutex_unlock(&wacom_udev_list_lock); 559 560 kfree(data); 561} 562 563static void wacom_remove_shared_data(struct wacom_wac *wacom) 564{ 565 struct wacom_usbdev_data *data; 566 567 if (wacom->shared) { 568 data = container_of(wacom->shared, struct wacom_usbdev_data, shared); 569 kref_put(&data->kref, wacom_release_shared_data); 570 wacom->shared = NULL; 571 } 572} 573 574static int wacom_led_control(struct wacom *wacom) 575{ 576 unsigned char *buf; 577 int retval, led = 0; 578 579 buf = kzalloc(9, GFP_KERNEL); 580 if (!buf) 581 return -ENOMEM; 582 583 if (wacom->wacom_wac.features.type == WACOM_21UX2 || 584 wacom->wacom_wac.features.type == WACOM_24HD) 585 led = (wacom->led.select[1] << 4) | 0x40; 586 587 led |= wacom->led.select[0] | 0x4; 588 589 buf[0] = WAC_CMD_LED_CONTROL; 590 buf[1] = led; 591 buf[2] = wacom->led.llv; 592 buf[3] = wacom->led.hlv; 593 buf[4] = wacom->led.img_lum; 594 595 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL, 596 buf, 9, WAC_CMD_RETRIES); 597 kfree(buf); 598 599 return retval; 600} 601 602static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img) 603{ 604 unsigned char *buf; 605 int i, retval; 606 607 buf = kzalloc(259, GFP_KERNEL); 608 if (!buf) 609 return -ENOMEM; 610 611 /* Send 'start' command */ 612 buf[0] = WAC_CMD_ICON_START; 613 buf[1] = 1; 614 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START, 615 buf, 2, WAC_CMD_RETRIES); 616 if (retval < 0) 617 goto out; 618 619 buf[0] = WAC_CMD_ICON_XFER; 620 buf[1] = button_id & 0x07; 621 for (i = 0; i < 4; i++) { 622 buf[2] = i; 623 memcpy(buf + 3, img + i * 256, 256); 624 625 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER, 626 buf, 259, WAC_CMD_RETRIES); 627 if (retval < 0) 628 break; 629 } 630 631 /* Send 'stop' */ 632 buf[0] = WAC_CMD_ICON_START; 633 buf[1] = 0; 634 wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START, 635 buf, 2, WAC_CMD_RETRIES); 636 637out: 638 kfree(buf); 639 return retval; 640} 641 642static ssize_t wacom_led_select_store(struct device *dev, int set_id, 643 const char *buf, size_t count) 644{ 645 struct wacom *wacom = dev_get_drvdata(dev); 646 unsigned int id; 647 int err; 648 649 err = kstrtouint(buf, 10, &id); 650 if (err) 651 return err; 652 653 mutex_lock(&wacom->lock); 654 655 wacom->led.select[set_id] = id & 0x3; 656 err = wacom_led_control(wacom); 657 658 mutex_unlock(&wacom->lock); 659 660 return err < 0 ? err : count; 661} 662 663#define DEVICE_LED_SELECT_ATTR(SET_ID) \ 664static ssize_t wacom_led##SET_ID##_select_store(struct device *dev, \ 665 struct device_attribute *attr, const char *buf, size_t count) \ 666{ \ 667 return wacom_led_select_store(dev, SET_ID, buf, count); \ 668} \ 669static ssize_t wacom_led##SET_ID##_select_show(struct device *dev, \ 670 struct device_attribute *attr, char *buf) \ 671{ \ 672 struct wacom *wacom = dev_get_drvdata(dev); \ 673 return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]); \ 674} \ 675static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR, \ 676 wacom_led##SET_ID##_select_show, \ 677 wacom_led##SET_ID##_select_store) 678 679DEVICE_LED_SELECT_ATTR(0); 680DEVICE_LED_SELECT_ATTR(1); 681 682static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest, 683 const char *buf, size_t count) 684{ 685 unsigned int value; 686 int err; 687 688 err = kstrtouint(buf, 10, &value); 689 if (err) 690 return err; 691 692 mutex_lock(&wacom->lock); 693 694 *dest = value & 0x7f; 695 err = wacom_led_control(wacom); 696 697 mutex_unlock(&wacom->lock); 698 699 return err < 0 ? err : count; 700} 701 702#define DEVICE_LUMINANCE_ATTR(name, field) \ 703static ssize_t wacom_##name##_luminance_store(struct device *dev, \ 704 struct device_attribute *attr, const char *buf, size_t count) \ 705{ \ 706 struct wacom *wacom = dev_get_drvdata(dev); \ 707 \ 708 return wacom_luminance_store(wacom, &wacom->led.field, \ 709 buf, count); \ 710} \ 711static DEVICE_ATTR(name##_luminance, S_IWUSR, \ 712 NULL, wacom_##name##_luminance_store) 713 714DEVICE_LUMINANCE_ATTR(status0, llv); 715DEVICE_LUMINANCE_ATTR(status1, hlv); 716DEVICE_LUMINANCE_ATTR(buttons, img_lum); 717 718static ssize_t wacom_button_image_store(struct device *dev, int button_id, 719 const char *buf, size_t count) 720{ 721 struct wacom *wacom = dev_get_drvdata(dev); 722 int err; 723 724 if (count != 1024) 725 return -EINVAL; 726 727 mutex_lock(&wacom->lock); 728 729 err = wacom_led_putimage(wacom, button_id, buf); 730 731 mutex_unlock(&wacom->lock); 732 733 return err < 0 ? err : count; 734} 735 736#define DEVICE_BTNIMG_ATTR(BUTTON_ID) \ 737static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev, \ 738 struct device_attribute *attr, const char *buf, size_t count) \ 739{ \ 740 return wacom_button_image_store(dev, BUTTON_ID, buf, count); \ 741} \ 742static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR, \ 743 NULL, wacom_btnimg##BUTTON_ID##_store) 744 745DEVICE_BTNIMG_ATTR(0); 746DEVICE_BTNIMG_ATTR(1); 747DEVICE_BTNIMG_ATTR(2); 748DEVICE_BTNIMG_ATTR(3); 749DEVICE_BTNIMG_ATTR(4); 750DEVICE_BTNIMG_ATTR(5); 751DEVICE_BTNIMG_ATTR(6); 752DEVICE_BTNIMG_ATTR(7); 753 754static struct attribute *cintiq_led_attrs[] = { 755 &dev_attr_status_led0_select.attr, 756 &dev_attr_status_led1_select.attr, 757 NULL 758}; 759 760static struct attribute_group cintiq_led_attr_group = { 761 .name = "wacom_led", 762 .attrs = cintiq_led_attrs, 763}; 764 765static struct attribute *intuos4_led_attrs[] = { 766 &dev_attr_status0_luminance.attr, 767 &dev_attr_status1_luminance.attr, 768 &dev_attr_status_led0_select.attr, 769 &dev_attr_buttons_luminance.attr, 770 &dev_attr_button0_rawimg.attr, 771 &dev_attr_button1_rawimg.attr, 772 &dev_attr_button2_rawimg.attr, 773 &dev_attr_button3_rawimg.attr, 774 &dev_attr_button4_rawimg.attr, 775 &dev_attr_button5_rawimg.attr, 776 &dev_attr_button6_rawimg.attr, 777 &dev_attr_button7_rawimg.attr, 778 NULL 779}; 780 781static struct attribute_group intuos4_led_attr_group = { 782 .name = "wacom_led", 783 .attrs = intuos4_led_attrs, 784}; 785 786static int wacom_initialize_leds(struct wacom *wacom) 787{ 788 int error; 789 790 /* Initialize default values */ 791 switch (wacom->wacom_wac.features.type) { 792 case INTUOS4: 793 case INTUOS4L: 794 wacom->led.select[0] = 0; 795 wacom->led.select[1] = 0; 796 wacom->led.llv = 10; 797 wacom->led.hlv = 20; 798 wacom->led.img_lum = 10; 799 error = sysfs_create_group(&wacom->intf->dev.kobj, 800 &intuos4_led_attr_group); 801 break; 802 803 case WACOM_24HD: 804 case WACOM_21UX2: 805 wacom->led.select[0] = 0; 806 wacom->led.select[1] = 0; 807 wacom->led.llv = 0; 808 wacom->led.hlv = 0; 809 wacom->led.img_lum = 0; 810 811 error = sysfs_create_group(&wacom->intf->dev.kobj, 812 &cintiq_led_attr_group); 813 break; 814 815 default: 816 return 0; 817 } 818 819 if (error) { 820 dev_err(&wacom->intf->dev, 821 "cannot create sysfs group err: %d\n", error); 822 return error; 823 } 824 wacom_led_control(wacom); 825 826 return 0; 827} 828 829static void wacom_destroy_leds(struct wacom *wacom) 830{ 831 switch (wacom->wacom_wac.features.type) { 832 case INTUOS4: 833 case INTUOS4L: 834 sysfs_remove_group(&wacom->intf->dev.kobj, 835 &intuos4_led_attr_group); 836 break; 837 838 case WACOM_24HD: 839 case WACOM_21UX2: 840 sysfs_remove_group(&wacom->intf->dev.kobj, 841 &cintiq_led_attr_group); 842 break; 843 } 844} 845 846static enum power_supply_property wacom_battery_props[] = { 847 POWER_SUPPLY_PROP_CAPACITY 848}; 849 850static int wacom_battery_get_property(struct power_supply *psy, 851 enum power_supply_property psp, 852 union power_supply_propval *val) 853{ 854 struct wacom *wacom = container_of(psy, struct wacom, battery); 855 int ret = 0; 856 857 switch (psp) { 858 case POWER_SUPPLY_PROP_CAPACITY: 859 val->intval = 860 wacom->wacom_wac.battery_capacity * 100 / 31; 861 break; 862 default: 863 ret = -EINVAL; 864 break; 865 } 866 867 return ret; 868} 869 870static int wacom_initialize_battery(struct wacom *wacom) 871{ 872 int error = 0; 873 874 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) { 875 wacom->battery.properties = wacom_battery_props; 876 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props); 877 wacom->battery.get_property = wacom_battery_get_property; 878 wacom->battery.name = "wacom_battery"; 879 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY; 880 wacom->battery.use_for_apm = 0; 881 882 error = power_supply_register(&wacom->usbdev->dev, 883 &wacom->battery); 884 } 885 886 return error; 887} 888 889static void wacom_destroy_battery(struct wacom *wacom) 890{ 891 if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) 892 power_supply_unregister(&wacom->battery); 893} 894 895static int wacom_register_input(struct wacom *wacom) 896{ 897 struct input_dev *input_dev; 898 struct usb_interface *intf = wacom->intf; 899 struct usb_device *dev = interface_to_usbdev(intf); 900 struct wacom_wac *wacom_wac = &(wacom->wacom_wac); 901 int error; 902 903 input_dev = input_allocate_device(); 904 if (!input_dev) 905 return -ENOMEM; 906 907 input_dev->name = wacom_wac->name; 908 input_dev->dev.parent = &intf->dev; 909 input_dev->open = wacom_open; 910 input_dev->close = wacom_close; 911 usb_to_input_id(dev, &input_dev->id); 912 input_set_drvdata(input_dev, wacom); 913 914 wacom_wac->input = input_dev; 915 wacom_setup_input_capabilities(input_dev, wacom_wac); 916 917 error = input_register_device(input_dev); 918 if (error) { 919 input_free_device(input_dev); 920 wacom_wac->input = NULL; 921 } 922 923 return error; 924} 925 926static void wacom_wireless_work(struct work_struct *work) 927{ 928 struct wacom *wacom = container_of(work, struct wacom, work); 929 struct usb_device *usbdev = wacom->usbdev; 930 struct wacom_wac *wacom_wac = &wacom->wacom_wac; 931 932 /* 933 * Regardless if this is a disconnect or a new tablet, 934 * remove any existing input devices. 935 */ 936 937 /* Stylus interface */ 938 wacom = usb_get_intfdata(usbdev->config->interface[1]); 939 if (wacom->wacom_wac.input) 940 input_unregister_device(wacom->wacom_wac.input); 941 wacom->wacom_wac.input = 0; 942 943 /* Touch interface */ 944 wacom = usb_get_intfdata(usbdev->config->interface[2]); 945 if (wacom->wacom_wac.input) 946 input_unregister_device(wacom->wacom_wac.input); 947 wacom->wacom_wac.input = 0; 948 949 if (wacom_wac->pid == 0) { 950 printk(KERN_INFO "wacom: wireless tablet disconnected\n"); 951 } else { 952 const struct usb_device_id *id = wacom_ids; 953 954 printk(KERN_INFO 955 "wacom: wireless tablet connected with PID %x\n", 956 wacom_wac->pid); 957 958 while (id->match_flags) { 959 if (id->idVendor == USB_VENDOR_ID_WACOM && 960 id->idProduct == wacom_wac->pid) 961 break; 962 id++; 963 } 964 965 if (!id->match_flags) { 966 printk(KERN_INFO 967 "wacom: ignorning unknown PID.\n"); 968 return; 969 } 970 971 /* Stylus interface */ 972 wacom = usb_get_intfdata(usbdev->config->interface[1]); 973 wacom_wac = &wacom->wacom_wac; 974 wacom_wac->features = 975 *((struct wacom_features *)id->driver_info); 976 wacom_wac->features.device_type = BTN_TOOL_PEN; 977 wacom_register_input(wacom); 978 979 /* Touch interface */ 980 wacom = usb_get_intfdata(usbdev->config->interface[2]); 981 wacom_wac = &wacom->wacom_wac; 982 wacom_wac->features = 983 *((struct wacom_features *)id->driver_info); 984 wacom_wac->features.pktlen = WACOM_PKGLEN_BBTOUCH3; 985 wacom_wac->features.device_type = BTN_TOOL_FINGER; 986 wacom_set_phy_from_res(&wacom_wac->features); 987 wacom_wac->features.x_max = wacom_wac->features.y_max = 4096; 988 wacom_register_input(wacom); 989 } 990} 991 992static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id) 993{ 994 struct usb_device *dev = interface_to_usbdev(intf); 995 struct usb_endpoint_descriptor *endpoint; 996 struct wacom *wacom; 997 struct wacom_wac *wacom_wac; 998 struct wacom_features *features; 999 int error; 1000 1001 if (!id->driver_info) 1002 return -EINVAL; 1003 1004 wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL); 1005 if (!wacom) 1006 return -ENOMEM; 1007 1008 wacom_wac = &wacom->wacom_wac; 1009 wacom_wac->features = *((struct wacom_features *)id->driver_info); 1010 features = &wacom_wac->features; 1011 if (features->pktlen > WACOM_PKGLEN_MAX) { 1012 error = -EINVAL; 1013 goto fail1; 1014 } 1015 1016 wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX, 1017 GFP_KERNEL, &wacom->data_dma); 1018 if (!wacom_wac->data) { 1019 error = -ENOMEM; 1020 goto fail1; 1021 } 1022 1023 wacom->irq = usb_alloc_urb(0, GFP_KERNEL); 1024 if (!wacom->irq) { 1025 error = -ENOMEM; 1026 goto fail2; 1027 } 1028 1029 wacom->usbdev = dev; 1030 wacom->intf = intf; 1031 mutex_init(&wacom->lock); 1032 INIT_WORK(&wacom->work, wacom_wireless_work); 1033 usb_make_path(dev, wacom->phys, sizeof(wacom->phys)); 1034 strlcat(wacom->phys, "/input0", sizeof(wacom->phys)); 1035 1036 endpoint = &intf->cur_altsetting->endpoint[0].desc; 1037 1038 /* Retrieve the physical and logical size for OEM devices */ 1039 error = wacom_retrieve_hid_descriptor(intf, features); 1040 if (error) 1041 goto fail3; 1042 1043 wacom_setup_device_quirks(features); 1044 1045 strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name)); 1046 1047 if (features->quirks & WACOM_QUIRK_MULTI_INPUT) { 1048 /* Append the device type to the name */ 1049 strlcat(wacom_wac->name, 1050 features->device_type == BTN_TOOL_PEN ? 1051 " Pen" : " Finger", 1052 sizeof(wacom_wac->name)); 1053 1054 error = wacom_add_shared_data(wacom_wac, dev); 1055 if (error) 1056 goto fail3; 1057 } 1058 1059 usb_fill_int_urb(wacom->irq, dev, 1060 usb_rcvintpipe(dev, endpoint->bEndpointAddress), 1061 wacom_wac->data, features->pktlen, 1062 wacom_sys_irq, wacom, endpoint->bInterval); 1063 wacom->irq->transfer_dma = wacom->data_dma; 1064 wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1065 1066 error = wacom_initialize_leds(wacom); 1067 if (error) 1068 goto fail4; 1069 1070 error = wacom_initialize_battery(wacom); 1071 if (error) 1072 goto fail5; 1073 1074 if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) { 1075 error = wacom_register_input(wacom); 1076 if (error) 1077 goto fail6; 1078 } 1079 1080 /* Note that if query fails it is not a hard failure */ 1081 wacom_query_tablet_data(intf, features); 1082 1083 usb_set_intfdata(intf, wacom); 1084 1085 if (features->quirks & WACOM_QUIRK_MONITOR) { 1086 if (usb_submit_urb(wacom->irq, GFP_KERNEL)) 1087 goto fail5; 1088 } 1089 1090 return 0; 1091 1092 fail6: wacom_destroy_battery(wacom); 1093 fail5: wacom_destroy_leds(wacom); 1094 fail4: wacom_remove_shared_data(wacom_wac); 1095 fail3: usb_free_urb(wacom->irq); 1096 fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma); 1097 fail1: kfree(wacom); 1098 return error; 1099} 1100 1101static void wacom_disconnect(struct usb_interface *intf) 1102{ 1103 struct wacom *wacom = usb_get_intfdata(intf); 1104 1105 usb_set_intfdata(intf, NULL); 1106 1107 usb_kill_urb(wacom->irq); 1108 cancel_work_sync(&wacom->work); 1109 if (wacom->wacom_wac.input) 1110 input_unregister_device(wacom->wacom_wac.input); 1111 wacom_destroy_battery(wacom); 1112 wacom_destroy_leds(wacom); 1113 usb_free_urb(wacom->irq); 1114 usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX, 1115 wacom->wacom_wac.data, wacom->data_dma); 1116 wacom_remove_shared_data(&wacom->wacom_wac); 1117 kfree(wacom); 1118} 1119 1120static int wacom_suspend(struct usb_interface *intf, pm_message_t message) 1121{ 1122 struct wacom *wacom = usb_get_intfdata(intf); 1123 1124 mutex_lock(&wacom->lock); 1125 usb_kill_urb(wacom->irq); 1126 mutex_unlock(&wacom->lock); 1127 1128 return 0; 1129} 1130 1131static int wacom_resume(struct usb_interface *intf) 1132{ 1133 struct wacom *wacom = usb_get_intfdata(intf); 1134 struct wacom_features *features = &wacom->wacom_wac.features; 1135 int rv = 0; 1136 1137 mutex_lock(&wacom->lock); 1138 1139 /* switch to wacom mode first */ 1140 wacom_query_tablet_data(intf, features); 1141 wacom_led_control(wacom); 1142 1143 if ((wacom->open || features->quirks & WACOM_QUIRK_MONITOR) 1144 && usb_submit_urb(wacom->irq, GFP_NOIO) < 0) 1145 rv = -EIO; 1146 1147 mutex_unlock(&wacom->lock); 1148 1149 return rv; 1150} 1151 1152static int wacom_reset_resume(struct usb_interface *intf) 1153{ 1154 return wacom_resume(intf); 1155} 1156 1157static struct usb_driver wacom_driver = { 1158 .name = "wacom", 1159 .id_table = wacom_ids, 1160 .probe = wacom_probe, 1161 .disconnect = wacom_disconnect, 1162 .suspend = wacom_suspend, 1163 .resume = wacom_resume, 1164 .reset_resume = wacom_reset_resume, 1165 .supports_autosuspend = 1, 1166}; 1167 1168module_usb_driver(wacom_driver); 1169