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] __initconst = {
  56         KEY_RESERVED,
  57         KEY_RESERVED,
  58         KEY_RESERVED,
  59         KEY_RESERVED,
  60         KEY_SCROLLDOWN,
  61         KEY_SCROLLUP,
  62         KEY_DIRECTION,
  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_U810[KEYMAP_LEN] __initconst = {
  75         KEY_RESERVED,
  76         KEY_RESERVED,
  77         KEY_RESERVED,
  78         KEY_RESERVED,
  79         KEY_PROG1,
  80         KEY_PROG2,
  81         KEY_DIRECTION,
  82         KEY_RESERVED,
  83         KEY_RESERVED,
  84         KEY_RESERVED,
  85         KEY_UP,
  86         KEY_DOWN,
  87         KEY_RESERVED,
  88         KEY_RESERVED,
  89         KEY_LEFTCTRL,
  90         KEY_LEFTALT
  91 };
  92
  93 static unsigned short keymap_Stylistic_Tseries[KEYMAP_LEN] __initconst = {
  94         KEY_RESERVED,
  95         KEY_RESERVED,
  96         KEY_RESERVED,
  97         KEY_RESERVED,
  98         KEY_PRINT,
  99         KEY_BACKSPACE,
 100         KEY_SPACE,
 101         KEY_ENTER,
 102         KEY_BRIGHTNESSUP,
 103         KEY_BRIGHTNESSDOWN,
 104         KEY_DOWN,
 105         KEY_UP,
 106         KEY_SCROLLUP,
 107         KEY_SCROLLDOWN,
 108         KEY_LEFTCTRL,
 109         KEY_LEFTALT
 110 };
 111
 112 static unsigned short keymap_Stylistic_ST5xxx[KEYMAP_LEN] __initconst = {
 113         KEY_RESERVED,
 114         KEY_RESERVED,
 115         KEY_RESERVED,
 116         KEY_RESERVED,
 117         KEY_MAIL,
 118         KEY_DIRECTION,
 119         KEY_ESC,
 120         KEY_ENTER,
 121         KEY_BRIGHTNESSUP,
 122         KEY_BRIGHTNESSDOWN,
 123         KEY_DOWN,
 124         KEY_UP,
 125         KEY_SCROLLUP,
 126         KEY_SCROLLDOWN,
 127         KEY_LEFTCTRL,
 128         KEY_LEFTALT
 129 };
 130
 131 static struct {
 132         struct input_dev *idev;
 133         struct fujitsu_config config;
 134         unsigned long prev_keymask;
 135
 136         char phys[21];
 137
 138         int irq;
 139         int io_base;
 140         int io_length;
 141 } fujitsu;
 142
 143 static u8 fujitsu_ack(void)
 144 {
 145         return inb(fujitsu.io_base + 2);
 146 }
 147
 148 static u8 fujitsu_status(void)
 149 {
 150         return inb(fujitsu.io_base + 6);
 151 }
 152
 153 static u8 fujitsu_read_register(const u8 addr)
 154 {
 155         outb(addr, fujitsu.io_base);
 156         return inb(fujitsu.io_base + 4);
 157 }
 158
 159 static void fujitsu_send_state(void)
 160 {
 161         int state;
 162         int dock, tablet_mode;
 163
 164         state = fujitsu_read_register(0xdd);
 165
 166         dock = state & 0x02;
 167         if (fujitsu.config.quirks & INVERT_DOCK_STATE_BIT)
 168                 dock = !dock;
 169
 170         if ((fujitsu.config.quirks & FORCE_TABLET_MODE_IF_UNDOCK) && (!dock)) {
 171                 tablet_mode = 1;
 172         } else{
 173                 tablet_mode = state & 0x01;
 174                 if (fujitsu.config.quirks & INVERT_TABLET_MODE_BIT)
 175                         tablet_mode = !tablet_mode;
 176         }
 177
 178         input_report_switch(fujitsu.idev, SW_DOCK, dock);
 179         input_report_switch(fujitsu.idev, SW_TABLET_MODE, tablet_mode);
 180         input_sync(fujitsu.idev);
 181 }
 182
 183 static void fujitsu_reset(void)
 184 {
 185         int timeout = 50;
 186
 187         fujitsu_ack();
 188
 189         while ((fujitsu_status() & 0x02) && (--timeout))
 190                 msleep(20);
 191
 192         fujitsu_send_state();
 193 }
 194
 195 static int __devinit input_fujitsu_setup(struct device *parent,
 196                                          const char *name, const char *phys)
 197 {
 198         struct input_dev *idev;
 199         int error;
 200         int i;
 201
 202         idev = input_allocate_device();
 203         if (!idev)
 204                 return -ENOMEM;
 205
 206         idev->dev.parent = parent;
 207         idev->phys = phys;
 208         idev->name = name;
 209         idev->id.bustype = BUS_HOST;
 210         idev->id.vendor  = 0x1734;      /* Fujitsu Siemens Computer GmbH */
 211         idev->id.product = 0x0001;
 212         idev->id.version = 0x0101;
 213
 214         idev->keycode = fujitsu.config.keymap;
 215         idev->keycodesize = sizeof(fujitsu.config.keymap[0]);
 216         idev->keycodemax = ARRAY_SIZE(fujitsu.config.keymap);
 217
 218         __set_bit(EV_REP, idev->evbit);
 219
 220         for (i = 0; i < ARRAY_SIZE(fujitsu.config.keymap); i++)
 221                 if (fujitsu.config.keymap[i])
 222                         input_set_capability(idev, EV_KEY, fujitsu.config.keymap[i]);
 223
 224         input_set_capability(idev, EV_MSC, MSC_SCAN);
 225
 226         input_set_capability(idev, EV_SW, SW_DOCK);
 227         input_set_capability(idev, EV_SW, SW_TABLET_MODE);
 228
 229         error = input_register_device(idev);
 230         if (error) {
 231                 input_free_device(idev);
 232                 return error;
 233         }
 234
 235         fujitsu.idev = idev;
 236         return 0;
 237 }
 238
 239 static void input_fujitsu_remove(void)
 240 {
 241         input_unregister_device(fujitsu.idev);
 242 }
 243
 244 static irqreturn_t fujitsu_interrupt(int irq, void *dev_id)
 245 {
 246         unsigned long keymask, changed;
 247         unsigned int keycode;
 248         int pressed;
 249         int i;
 250
 251         if (unlikely(!(fujitsu_status() & 0x01)))
 252                 return IRQ_NONE;
 253
 254         fujitsu_send_state();
 255
 256         keymask  = fujitsu_read_register(0xde);
 257         keymask |= fujitsu_read_register(0xdf) << 8;
 258         keymask ^= 0xffff;
 259
 260         changed = keymask ^ fujitsu.prev_keymask;
 261         if (changed) {
 262                 fujitsu.prev_keymask = keymask;
 263
 264                 for_each_set_bit(i, &changed, KEYMAP_LEN) {
 265                         keycode = fujitsu.config.keymap[i];
 266                         pressed = keymask & changed & BIT(i);
 267
 268                         if (pressed)
 269                                 input_event(fujitsu.idev, EV_MSC, MSC_SCAN, i);
 270
 271                         input_report_key(fujitsu.idev, keycode, pressed);
 272                         input_sync(fujitsu.idev);
 273                 }
 274         }
 275
 276         fujitsu_ack();
 277         return IRQ_HANDLED;
 278 }
 279
 280 static void __devinit fujitsu_dmi_common(const struct dmi_system_id *dmi)
 281 {
 282         pr_info("%s\n", dmi->ident);
 283         memcpy(fujitsu.config.keymap, dmi->driver_data,
 284                         sizeof(fujitsu.config.keymap));
 285 }
 286
 287 static int __devinit fujitsu_dmi_lifebook(const struct dmi_system_id *dmi)
 288 {
 289         fujitsu_dmi_common(dmi);
 290         fujitsu.config.quirks |= INVERT_TABLET_MODE_BIT;
 291         return 1;
 292 }
 293
 294 static int __devinit fujitsu_dmi_stylistic(const struct dmi_system_id *dmi)
 295 {
 296         fujitsu_dmi_common(dmi);
 297         fujitsu.config.quirks |= FORCE_TABLET_MODE_IF_UNDOCK;
 298         fujitsu.config.quirks |= INVERT_DOCK_STATE_BIT;
 299         return 1;
 300 }
 301
 302 static struct dmi_system_id dmi_ids[] __initconst = {
 303         {
 304                 .callback = fujitsu_dmi_lifebook,
 305                 .ident = "Fujitsu Siemens P/T Series",
 306                 .matches = {
 307                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 308                         DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK")
 309                 },
 310                 .driver_data = keymap_Lifebook_Tseries
 311         },
 312         {
 313                 .callback = fujitsu_dmi_lifebook,
 314                 .ident = "Fujitsu Lifebook T Series",
 315                 .matches = {
 316                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 317                         DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook T")
 318                 },
 319                 .driver_data = keymap_Lifebook_Tseries
 320         },
 321         {
 322                 .callback = fujitsu_dmi_stylistic,
 323                 .ident = "Fujitsu Siemens Stylistic T Series",
 324                 .matches = {
 325                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 326                         DMI_MATCH(DMI_PRODUCT_NAME, "Stylistic T")
 327                 },
 328                 .driver_data = keymap_Stylistic_Tseries
 329         },
 330         {
 331                 .callback = fujitsu_dmi_lifebook,
 332                 .ident = "Fujitsu LifeBook U810",
 333                 .matches = {
 334                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 335                         DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook U810")
 336                 },
 337                 .driver_data = keymap_Lifebook_U810
 338         },
 339         {
 340                 .callback = fujitsu_dmi_stylistic,
 341                 .ident = "Fujitsu Siemens Stylistic ST5xxx Series",
 342                 .matches = {
 343                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 344                         DMI_MATCH(DMI_PRODUCT_NAME, "STYLISTIC ST5")
 345                 },
 346                 .driver_data = keymap_Stylistic_ST5xxx
 347         },
 348         {
 349                 .callback = fujitsu_dmi_stylistic,
 350                 .ident = "Fujitsu Siemens Stylistic ST5xxx Series",
 351                 .matches = {
 352                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
 353                         DMI_MATCH(DMI_PRODUCT_NAME, "Stylistic ST5")
 354                 },
 355                 .driver_data = keymap_Stylistic_ST5xxx
 356         },
 357         {
 358                 .callback = fujitsu_dmi_lifebook,
 359                 .ident = "Unknown (using defaults)",
 360                 .matches = {
 361                         DMI_MATCH(DMI_SYS_VENDOR, ""),
 362                         DMI_MATCH(DMI_PRODUCT_NAME, "")
 363                 },
 364                 .driver_data = keymap_Lifebook_Tseries
 365         },
 366         { NULL }
 367 };
 368
 369 static acpi_status __devinit
 370 fujitsu_walk_resources(struct acpi_resource *res, void *data)
 371 {
 372         switch (res->type) {
 373         case ACPI_RESOURCE_TYPE_IRQ:
 374                 fujitsu.irq = res->data.irq.interrupts[0];
 375                 return AE_OK;
 376
 377         case ACPI_RESOURCE_TYPE_IO:
 378                 fujitsu.io_base = res->data.io.minimum;
 379                 fujitsu.io_length = res->data.io.address_length;
 380                 return AE_OK;
 381
 382         case ACPI_RESOURCE_TYPE_END_TAG:
 383                 if (fujitsu.irq && fujitsu.io_base)
 384                         return AE_OK;
 385                 else
 386                         return AE_NOT_FOUND;
 387
 388         default:
 389                 return AE_ERROR;
 390         }
 391 }
 392
 393 static int __devinit acpi_fujitsu_add(struct acpi_device *adev)
 394 {
 395         acpi_status status;
 396         int error;
 397
 398         if (!adev)
 399                 return -EINVAL;
 400
 401         status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
 402                         fujitsu_walk_resources, NULL);
 403         if (ACPI_FAILURE(status) || !fujitsu.irq || !fujitsu.io_base)
 404                 return -ENODEV;
 405
 406         sprintf(acpi_device_name(adev), "Fujitsu %s", acpi_device_hid(adev));
 407         sprintf(acpi_device_class(adev), "%s", ACPI_FUJITSU_CLASS);
 408
 409         snprintf(fujitsu.phys, sizeof(fujitsu.phys),
 410                         "%s/input0", acpi_device_hid(adev));
 411
 412         error = input_fujitsu_setup(&adev->dev,
 413                 acpi_device_name(adev), fujitsu.phys);
 414         if (error)
 415                 return error;
 416
 417         if (!request_region(fujitsu.io_base, fujitsu.io_length, MODULENAME)) {
 418                 input_fujitsu_remove();
 419                 return -EBUSY;
 420         }
 421
 422         fujitsu_reset();
 423
 424         error = request_irq(fujitsu.irq, fujitsu_interrupt,
 425                         IRQF_SHARED, MODULENAME, fujitsu_interrupt);
 426         if (error) {
 427                 release_region(fujitsu.io_base, fujitsu.io_length);
 428                 input_fujitsu_remove();
 429                 return error;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static int __devexit acpi_fujitsu_remove(struct acpi_device *adev, int type)
 436 {
 437         free_irq(fujitsu.irq, fujitsu_interrupt);
 438         release_region(fujitsu.io_base, fujitsu.io_length);
 439         input_fujitsu_remove();
 440         return 0;
 441 }
 442
 443 #ifdef CONFIG_PM_SLEEP
 444 static int acpi_fujitsu_resume(struct device *dev)
 445 {
 446         fujitsu_reset();
 447         return 0;
 448 }
 449 #endif
 450
 451 static SIMPLE_DEV_PM_OPS(acpi_fujitsu_pm, NULL, acpi_fujitsu_resume);
 452
 453 static struct acpi_driver acpi_fujitsu_driver = {
 454         .name  = MODULENAME,
 455         .class = "hotkey",
 456         .ids   = fujitsu_ids,
 457         .ops   = {
 458                 .add    = acpi_fujitsu_add,
 459                 .remove = acpi_fujitsu_remove,
 460         },
 461         .drv.pm = &acpi_fujitsu_pm,
 462 };
 463
 464 static int __init fujitsu_module_init(void)
 465 {
 466         int error;
 467
 468         dmi_check_system(dmi_ids);
 469
 470         error = acpi_bus_register_driver(&acpi_fujitsu_driver);
 471         if (error)
 472                 return error;
 473
 474         return 0;
 475 }
 476
 477 static void __exit fujitsu_module_exit(void)
 478 {
 479         acpi_bus_unregister_driver(&acpi_fujitsu_driver);
 480 }
 481
 482 module_init(fujitsu_module_init);
 483 module_exit(fujitsu_module_exit);
 484
 485 MODULE_AUTHOR("Robert Gerlach <khnz@gmx.de>");
 486 MODULE_DESCRIPTION("Fujitsu tablet pc extras driver");
 487 MODULE_LICENSE("GPL");
 488 MODULE_VERSION("2.5");
 489
 490 MODULE_DEVICE_TABLE(acpi, fujitsu_ids);