drivers/platform/x86/fujitsu-tablet.c

   1 /*
   2  * Copyright (C) 2006-2012 Robert Gerlach <khnz@gmx.de>
   3  * Copyright (C) 2005-2006 Jan Rychter <jan@rychter.com>
   4  *
   5  * You can redistribute and/or modify this program under the terms of the
   6  * GNU General Public License version 2 as published by the Free Software
   7  * Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
  12  * Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place Suite 330, Boston, MA 02111-1307, USA.
  17  */
  18
  19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  20
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/init.h>
  24 #include <linux/bitops.h>
  25 #include <linux/io.h>
  26 #include <linux/ioport.h>
  27 #include <linux/acpi.h>
  28 #include <linux/device.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/input.h>
  31 #include <linux/delay.h>
  32 #include <linux/dmi.h>
  33
  34 #define MODULENAME "fujitsu-tablet"
  35
  36 #define ACPI_FUJITSU_CLASS "fujitsu"
  37
  38 #define INVERT_TABLET_MODE_BIT      0x01
  39 #define INVERT_DOCK_STATE_BIT       0x02
  40 #define FORCE_TABLET_MODE_IF_UNDOCK 0x04
  41
  42 #define KEYMAP_LEN 16
  43
  44 static const struct acpi_device_id fujitsu_ids[] = {
  45         { .id = "FUJ02BD" },
  46         { .id = "FUJ02BF" },
  47         { .id = "" }
  48 };
  49
  50 struct fujitsu_config {
  51         unsigned short keymap[KEYMAP_LEN];
  52         unsigned int quirks;
  53 };
  54
  55 static unsigned short keymap_Lifebook_Tseries[KEYMAP_LEN] __initdata = {
  56         KEY_RESERVED,
  57         KEY_RESERVED,
  58         KEY_RESERVED,
  59         KEY_RESERVED,
  60         KEY_SCROLLDOWN,
  61         KEY_SCROLLUP,
  62         KEY_ROTATE_DISPLAY,
  63         KEY_LEFTCTRL,
  64         KEY_BRIGHTNESSUP,
  65         KEY_BRIGHTNESSDOWN,
  66         KEY_BRIGHTNESS_ZERO,
  67         KEY_RESERVED,
  68         KEY_RESERVED,
  69         KEY_RESERVED,
  70         KEY_RESERVED,
  71         KEY_LEFTALT
  72 };
  73
  74 static unsigned short keymap_Lifebook_T901[KEYMAP_LEN] __initdata = {
  75         KEY_RESERVED,
  76         KEY_RESERVED,
  77         KEY_RESERVED,
  78         KEY_RESERVED,
  79         KEY_SCROLLDOWN,
  80         KEY_SCROLLUP,
  81         KEY_CYCLEWINDOWS,
  82         KEY_LEFTCTRL,
  83         KEY_RESERVED,
  84         KEY_RESERVED,
  85         KEY_RESERVED,
  86         KEY_RESERVED,
  87         KEY_RESERVED,
  88         KEY_RESERVED,
  89         KEY_RESERVED,
  90         KEY_LEFTMETA
  91 };
  92
  93 static unsigned short keymap_Lifebook_T902[KEYMAP_LEN] __initdata = {
  94         KEY_RESERVED,
  95         KEY_VOLUMEDOWN,
  96         KEY_VOLUMEUP,
  97         KEY_CYCLEWINDOWS,
  98         KEY_PROG1,
  99         KEY_PROG2,
 100         KEY_LEFTMETA,
 101         KEY_RESERVED,
 102         KEY_RESERVED,
 103         KEY_RESERVED,
 104         KEY_RESERVED,
 105         KEY_RESERVED,
 106         KEY_RESERVED,
 107         KEY_RESERVED,
 108         KEY_RESERVED,
 109         KEY_RESERVED,
 110 };
 111
 112 static unsigned short keymap_Lifebook_U810[KEYMAP_LEN] __initdata = {
 113         KEY_RESERVED,
 114         KEY_RESERVED,
 115         KEY_RESERVED,
 116         KEY_RESERVED,
 117         KEY_PROG1,
 118         KEY_PROG2,
 119         KEY_ROTATE_DISPLAY,
 120         KEY_RESERVED,
 121         KEY_RESERVED,
 122         KEY_RESERVED,
 123         KEY_UP,
 124         KEY_DOWN,
 125         KEY_RESERVED,
 126         KEY_RESERVED,
 127         KEY_LEFTCTRL,
 128         KEY_LEFTALT
 129 };
 130
 131 static unsigned short keymap_Stylistic_Tseries[KEYMAP_LEN] __initdata = {
 132         KEY_RESERVED,
 133         KEY_RESERVED,
 134         KEY_RESERVED,
 135         KEY_RESERVED,
 136         KEY_PRINT,
 137         KEY_BACKSPACE,
 138         KEY_SPACE,
 139         KEY_ENTER,
 140         KEY_BRIGHTNESSUP,
 141         KEY_BRIGHTNESSDOWN,
 142         KEY_DOWN,
 143         KEY_UP,
 144         KEY_SCROLLUP,
 145         KEY_SCROLLDOWN,
 146         KEY_LEFTCTRL,
 147         KEY_LEFTALT
 148 };
 149
 150 static unsigned short keymap_Stylistic_ST5xxx[KEYMAP_LEN] __initdata = {
 151         KEY_RESERVED,
 152         KEY_RESERVED,
 153         KEY_RESERVED,
 154         KEY_RESERVED,
 155         KEY_MAIL,
 156         KEY_ROTATE_DISPLAY,
 157         KEY_ESC,
 158         KEY_ENTER,
 159         KEY_BRIGHTNESSUP,
 160         KEY_BRIGHTNESSDOWN,
 161         KEY_DOWN,
 162         KEY_UP,
 163         KEY_SCROLLUP,
 164         KEY_SCROLLDOWN,
 165         KEY_LEFTCTRL,
 166         KEY_LEFTALT
 167 };
 168
 169 static struct {
 170         struct input_dev *idev;
 171         struct fujitsu_config config;
 172         unsigned long prev_keymask;
 173
 174         char phys[21];
 175
 176         int irq;
 177         int io_base;
 178         int io_length;
 179 } fujitsu;
 180
 181 static u8 fujitsu_ack(void)
 182 {
 183         return inb(fujitsu.io_base + 2);
 184 }
 185
 186 static u8 fujitsu_status(void)
 187 {
 188         return inb(fujitsu.io_base + 6);
 189 }
 190
 191 static u8 fujitsu_read_register(const u8 addr)
 192 {
 193         outb(addr, fujitsu.io_base);
 194         return inb(fujitsu.io_base + 4);
 195 }
 196
 197 static void fujitsu_send_state(void)
 198 {
 199         int state;
 200         int dock, tablet_mode;
 201
 202         state = fujitsu_read_register(0xdd);
 203
 204         dock = state & 0x02;
 205         if (fujitsu.config.quirks & INVERT_DOCK_STATE_BIT)
 206                 dock = !dock;
 207
 208         if ((fujitsu.config.quirks & FORCE_TABLET_MODE_IF_UNDOCK) && (!dock)) {
 209                 tablet_mode = 1;
 210         } else{
 211                 tablet_mode = state & 0x01;
 212                 if (fujitsu.config.quirks & INVERT_TABLET_MODE_BIT)
 213                         tablet_mode = !tablet_mode;
 214         }
 215
 216         input_report_switch(fujitsu.idev, SW_DOCK, dock);
 217         input_report_switch(fujitsu.idev, SW_TABLET_MODE, tablet_mode);
 218         input_sync(fujitsu.idev);
 219 }
 220
 221 static void fujitsu_reset(void)
 222 {
 223         int timeout = 50;
 224
 225         fujitsu_ack();
 226
 227         while ((fujitsu_status() & 0x02) && (--timeout))
 228                 msleep(20);
 229
 230         fujitsu_send_state();
 231 }
 232
 233 static int input_fujitsu_setup(struct device *parent, const char *name,
 234                                const char *phys)
 235 {
 236         struct input_dev *idev;
 237         int error;
 238         int i;
 239
 240         idev = input_allocate_device();
 241         if (!idev)
 242                 return -ENOMEM;
 243
 244         idev->dev.parent = parent;
 245         idev->phys = phys;
 246         idev->name = name;
 247         idev->id.bustype = BUS_HOST;
 248         idev->id.vendor  = 0x1734;      /* Fujitsu Siemens Computer GmbH */
 249         idev->id.product = 0x0001;
 250         idev->id.version = 0x0101;
 251
 252         idev->keycode = fujitsu.config.keymap;
 253         idev->keycodesize = sizeof(fujitsu.config.keymap[0]);
 254         idev->keycodemax = ARRAY_SIZE(fujitsu.config.keymap);
 255
 256         __set_bit(EV_REP, idev->evbit);
 257
 258         for (i = 0; i < ARRAY_SIZE(fujitsu.config.keymap); i++)
 259                 if (fujitsu.config.keymap[i])
 260                         input_set_capability(idev, EV_KEY, fujitsu.config.keymap[i]);
 261
 262         input_set_capability(idev, EV_MSC, MSC_SCAN);
 263
 264         input_set_capability(idev, EV_SW, SW_DOCK);
 265         input_set_capability(idev, EV_SW, SW_TABLET_MODE);
 266
 267         error = input_register_device(idev);
 268         if (error) {
 269                 input_free_device(idev);
 270                 return error;
 271         }
 272
 273         fujitsu.idev = idev;
 274         return 0;
 275 }
 276
 277 static void input_fujitsu_remove(void)
 278 {
 279         input_unregister_device(fujitsu.idev);
 280 }
 281
 282 static irqreturn_t fujitsu_interrupt(int irq, void *dev_id)
 283 {
 284         unsigned long keymask, changed;
 285         unsigned int keycode;
 286         int pressed;
 287         int i;
 288
 289         if (unlikely(!(fujitsu_status() & 0x01)))
 290                 return IRQ_NONE;
 291
 292         fujitsu_send_state();
 293
 294         keymask  = fujitsu_read_register(0xde);
 295         keymask |= fujitsu_read_register(0xdf) << 8;
 296         keymask ^= 0xffff;
 297
 298         changed = keymask ^ fujitsu.prev_keymask;
 299         if (changed) {
 300                 fujitsu.prev_keymask = keymask;
 301
 302                 for_each_set_bit(i, &changed, KEYMAP_LEN) {
 303                         keycode = fujitsu.config.keymap[i];
 304                         pressed = keymask & changed & BIT(i);
 305
 306                         if (pressed)
 307                                 input_event(fujitsu.idev, EV_MSC, MSC_SCAN, i);
 308
 309                         input_report_key(fujitsu.idev, keycode, pressed);
 310                         input_sync(fujitsu.idev);
 311                 }
 312         }
 313
 314         fujitsu_ack();
 315         return IRQ_HANDLED;
 316 }
 317
 318 static void __init fujitsu_dmi_common(const struct dmi_system_id *dmi)
 319 {
 320         pr_info("%s\n", dmi->ident);
 321         memcpy(fujitsu.config.keymap, dmi->driver_data,
 322                         sizeof(fujitsu.config.keymap));
 323 }
 324
 325 static int __init fujitsu_dmi_lifebook(const struct dmi_system_id *dmi)
 326 {
 327         fujitsu_dmi_common(dmi);
 328         fujitsu.config.quirks |= INVERT_TABLET_MODE_BIT;
 329         return 1;
 330 }
 331
 332 static int __init fujitsu_dmi_stylistic(const struct dmi_system_id *dmi)
 333 {
 334         fujitsu_dmi_common(dmi);
 335         fujitsu.config.quirks |= FORCE_TABLET_MODE_IF_UNDOCK;
 336         fujitsu.config.quirks |= INVERT_DOCK_STATE_BIT;
 337         return 1;
 338 }
 339
 340 static const struct dmi_system_id dmi_ids[] __initconst = {
 341         {
 342                 .callback = fujitsu_dmi_lifebook,
 343                 .ident = "Fujitsu Lifebook T901",
 344                 .matches = {
 345                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 346                         DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook T901")
 347                 },
 348                 .driver_data = keymap_Lifebook_T901
 349         },
 350         {
 351                 .callback = fujitsu_dmi_lifebook,
 352                 .ident = "Fujitsu Lifebook T901",
 353                 .matches = {
 354                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 355                         DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK T901")
 356                 },
 357                 .driver_data = keymap_Lifebook_T901
 358         },
 359         {
 360                 .callback = fujitsu_dmi_lifebook,
 361                 .ident = "Fujitsu Lifebook T902",
 362                 .matches = {
 363                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 364                         DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK T902")
 365                 },
 366                 .driver_data = keymap_Lifebook_T902
 367         },
 368         {
 369                 .callback = fujitsu_dmi_lifebook,
 370                 .ident = "Fujitsu Siemens P/T Series",
 371                 .matches = {
 372                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 373                         DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK")
 374                 },
 375                 .driver_data = keymap_Lifebook_Tseries
 376         },
 377         {
 378                 .callback = fujitsu_dmi_lifebook,
 379                 .ident = "Fujitsu Lifebook T Series",
 380                 .matches = {
 381                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 382                         DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook T")
 383                 },
 384                 .driver_data = keymap_Lifebook_Tseries
 385         },
 386         {
 387                 .callback = fujitsu_dmi_stylistic,
 388                 .ident = "Fujitsu Siemens Stylistic T Series",
 389                 .matches = {
 390                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 391                         DMI_MATCH(DMI_PRODUCT_NAME, "Stylistic T")
 392                 },
 393                 .driver_data = keymap_Stylistic_Tseries
 394         },
 395         {
 396                 .callback = fujitsu_dmi_lifebook,
 397                 .ident = "Fujitsu LifeBook U810",
 398                 .matches = {
 399                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 400                         DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook U810")
 401                 },
 402                 .driver_data = keymap_Lifebook_U810
 403         },
 404         {
 405                 .callback = fujitsu_dmi_stylistic,
 406                 .ident = "Fujitsu Siemens Stylistic ST5xxx Series",
 407                 .matches = {
 408                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 409                         DMI_MATCH(DMI_PRODUCT_NAME, "STYLISTIC ST5")
 410                 },
 411                 .driver_data = keymap_Stylistic_ST5xxx
 412         },
 413         {
 414                 .callback = fujitsu_dmi_stylistic,
 415                 .ident = "Fujitsu Siemens Stylistic ST5xxx Series",
 416                 .matches = {
 417                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 418                         DMI_MATCH(DMI_PRODUCT_NAME, "Stylistic ST5")
 419                 },
 420                 .driver_data = keymap_Stylistic_ST5xxx
 421         },
 422         {
 423                 .callback = fujitsu_dmi_lifebook,
 424                 .ident = "Unknown (using defaults)",
 425                 .matches = {
 426                         DMI_MATCH(DMI_SYS_VENDOR, ""),
 427                         DMI_MATCH(DMI_PRODUCT_NAME, "")
 428                 },
 429                 .driver_data = keymap_Lifebook_Tseries
 430         },
 431         { NULL }
 432 };
 433
 434 static acpi_status fujitsu_walk_resources(struct acpi_resource *res, void *data)
 435 {
 436         switch (res->type) {
 437         case ACPI_RESOURCE_TYPE_IRQ:
 438                 fujitsu.irq = res->data.irq.interrupts[0];
 439                 return AE_OK;
 440
 441         case ACPI_RESOURCE_TYPE_IO:
 442                 fujitsu.io_base = res->data.io.minimum;
 443                 fujitsu.io_length = res->data.io.address_length;
 444                 return AE_OK;
 445
 446         case ACPI_RESOURCE_TYPE_END_TAG:
 447                 if (fujitsu.irq && fujitsu.io_base)
 448                         return AE_OK;
 449                 else
 450                         return AE_NOT_FOUND;
 451
 452         default:
 453                 return AE_ERROR;
 454         }
 455 }
 456
 457 static int acpi_fujitsu_add(struct acpi_device *adev)
 458 {
 459         acpi_status status;
 460         int error;
 461
 462         if (!adev)
 463                 return -EINVAL;
 464
 465         status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
 466                         fujitsu_walk_resources, NULL);
 467         if (ACPI_FAILURE(status) || !fujitsu.irq || !fujitsu.io_base)
 468                 return -ENODEV;
 469
 470         sprintf(acpi_device_name(adev), "Fujitsu %s", acpi_device_hid(adev));
 471         sprintf(acpi_device_class(adev), "%s", ACPI_FUJITSU_CLASS);
 472
 473         snprintf(fujitsu.phys, sizeof(fujitsu.phys),
 474                         "%s/input0", acpi_device_hid(adev));
 475
 476         error = input_fujitsu_setup(&adev->dev,
 477                 acpi_device_name(adev), fujitsu.phys);
 478         if (error)
 479                 return error;
 480
 481         if (!request_region(fujitsu.io_base, fujitsu.io_length, MODULENAME)) {
 482                 input_fujitsu_remove();
 483                 return -EBUSY;
 484         }
 485
 486         fujitsu_reset();
 487
 488         error = request_irq(fujitsu.irq, fujitsu_interrupt,
 489                         IRQF_SHARED, MODULENAME, fujitsu_interrupt);
 490         if (error) {
 491                 release_region(fujitsu.io_base, fujitsu.io_length);
 492                 input_fujitsu_remove();
 493                 return error;
 494         }
 495
 496         return 0;
 497 }
 498
 499 static int acpi_fujitsu_remove(struct acpi_device *adev)
 500 {
 501         free_irq(fujitsu.irq, fujitsu_interrupt);
 502         release_region(fujitsu.io_base, fujitsu.io_length);
 503         input_fujitsu_remove();
 504         return 0;
 505 }
 506
 507 #ifdef CONFIG_PM_SLEEP
 508 static int acpi_fujitsu_resume(struct device *dev)
 509 {
 510         fujitsu_reset();
 511         return 0;
 512 }
 513 #endif
 514
 515 static SIMPLE_DEV_PM_OPS(acpi_fujitsu_pm, NULL, acpi_fujitsu_resume);
 516
 517 static struct acpi_driver acpi_fujitsu_driver = {
 518         .name  = MODULENAME,
 519         .class = "hotkey",
 520         .ids   = fujitsu_ids,
 521         .ops   = {
 522                 .add    = acpi_fujitsu_add,
 523                 .remove = acpi_fujitsu_remove,
 524         },
 525         .drv.pm = &acpi_fujitsu_pm,
 526 };
 527
 528 static int __init fujitsu_module_init(void)
 529 {
 530         int error;
 531
 532         dmi_check_system(dmi_ids);
 533
 534         error = acpi_bus_register_driver(&acpi_fujitsu_driver);
 535         if (error)
 536                 return error;
 537
 538         return 0;
 539 }
 540
 541 static void __exit fujitsu_module_exit(void)
 542 {
 543         acpi_bus_unregister_driver(&acpi_fujitsu_driver);
 544 }
 545
 546 module_init(fujitsu_module_init);
 547 module_exit(fujitsu_module_exit);
 548
 549 MODULE_AUTHOR("Robert Gerlach <khnz@gmx.de>");
 550 MODULE_DESCRIPTION("Fujitsu tablet pc extras driver");
 551 MODULE_LICENSE("GPL");
 552 MODULE_VERSION("2.5");
 553
 554 MODULE_DEVICE_TABLE(acpi, fujitsu_ids);