drivers/platform/x86/panasonic-laptop.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Panasonic HotKey and LCD brightness control driver
   4  *  (C) 2004 Hiroshi Miura <[email protected]>
   5  *  (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/
   6  *  (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp>
   7  *  (C) 2004 David Bronaugh <dbronaugh>
   8  *  (C) 2006-2008 Harald Welte <[email protected]>
   9  *
  10  *  derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte
  11  *
  12  *---------------------------------------------------------------------------
  13  *
  14  * ChangeLog:
  15  *      Aug.18, 2020    Kenneth Chan <[email protected]>
  16  *              -v0.98  add platform devices for firmware brightness registers
  17  *                      add support for battery charging threshold (eco mode)
  18  *                      resolve hotkey double trigger
  19  *                      add write support to mute
  20  *                      fix sticky_key init bug
  21  *                      fix naming of platform files for consistency with other
  22  *                      modules
  23  *                      split MODULE_AUTHOR() by one author per macro call
  24  *                      replace ACPI prints with pr_*() macros
  25  *              -v0.97  add support for cdpower hardware switch
  26  *              -v0.96  merge Lucina's enhancement
  27  *                      Jan.13, 2009 Martin Lucina <[email protected]>
  28  *                              - add support for optical driver power in
  29  *                                Y and W series
  30  *
  31  *      Sep.23, 2008    Harald Welte <[email protected]>
  32  *              -v0.95  rename driver from drivers/acpi/pcc_acpi.c to
  33  *                      drivers/misc/panasonic-laptop.c
  34  *
  35  *      Jul.04, 2008    Harald Welte <[email protected]>
  36  *              -v0.94  replace /proc interface with device attributes
  37  *                      support {set,get}keycode on th input device
  38  *
  39  *      Jun.27, 2008    Harald Welte <[email protected]>
  40  *              -v0.92  merge with 2.6.26-rc6 input API changes
  41  *                      remove broken <= 2.6.15 kernel support
  42  *                      resolve all compiler warnings
  43  *                      various coding style fixes (checkpatch.pl)
  44  *                      add support for backlight api
  45  *                      major code restructuring
  46  *
  47  *      Dac.28, 2007    Harald Welte <[email protected]>
  48  *              -v0.91  merge with 2.6.24-rc6 ACPI changes
  49  *
  50  *      Nov.04, 2006    Hiroshi Miura <[email protected]>
  51  *              -v0.9   remove warning about section reference.
  52  *                      remove acpi_os_free
  53  *                      add /proc/acpi/pcc/brightness interface for HAL access
  54  *                      merge dbronaugh's enhancement
  55  *                      Aug.17, 2004 David Bronaugh (dbronaugh)
  56  *                              - Added screen brightness setting interface
  57  *                                Thanks to FreeBSD crew (acpi_panasonic.c)
  58  *                                for the ideas I needed to accomplish it
  59  *
  60  *      May.29, 2006    Hiroshi Miura <[email protected]>
  61  *              -v0.8.4 follow to change keyinput structure
  62  *                      thanks Fabian Yamaguchi <[email protected]>,
  63  *                      Jacob Bower <[email protected]> and
  64  *                      Hiroshi Yokota for providing solutions.
  65  *
  66  *      Oct.02, 2004    Hiroshi Miura <[email protected]>
  67  *              -v0.8.2 merge code of YOKOTA Hiroshi
  68  *                                      <[email protected]>.
  69  *                      Add sticky key mode interface.
  70  *                      Refactoring acpi_pcc_generate_keyinput().
  71  *
  72  *      Sep.15, 2004    Hiroshi Miura <[email protected]>
  73  *              -v0.8   Generate key input event on input subsystem.
  74  *                      This is based on yet another driver written by
  75  *                                                      Ryuta Nakanishi.
  76  *
  77  *      Sep.10, 2004    Hiroshi Miura <[email protected]>
  78  *              -v0.7   Change proc interface functions using seq_file
  79  *                      facility as same as other ACPI drivers.
  80  *
  81  *      Aug.28, 2004    Hiroshi Miura <[email protected]>
  82  *              -v0.6.4 Fix a silly error with status checking
  83  *
  84  *      Aug.25, 2004    Hiroshi Miura <[email protected]>
  85  *              -v0.6.3 replace read_acpi_int by standard function
  86  *                                                      acpi_evaluate_integer
  87  *                      some clean up and make smart copyright notice.
  88  *                      fix return value of pcc_acpi_get_key()
  89  *                      fix checking return value of acpi_bus_register_driver()
  90  *
  91  *      Aug.22, 2004    David Bronaugh <[email protected]>
  92  *              -v0.6.2 Add check on ACPI data (num_sifr)
  93  *                      Coding style cleanups, better error messages/handling
  94  *                      Fixed an off-by-one error in memory allocation
  95  *
  96  *      Aug.21, 2004    David Bronaugh <[email protected]>
  97  *              -v0.6.1 Fix a silly error with status checking
  98  *
  99  *      Aug.20, 2004    David Bronaugh <[email protected]>
 100  *              - v0.6  Correct brightness controls to reflect reality
 101  *                      based on information gleaned by Hiroshi Miura
 102  *                      and discussions with Hiroshi Miura
 103  *
 104  *      Aug.10, 2004    Hiroshi Miura <[email protected]>
 105  *              - v0.5  support LCD brightness control
 106  *                      based on the disclosed information by MEI.
 107  *
 108  *      Jul.25, 2004    Hiroshi Miura <[email protected]>
 109  *              - v0.4  first post version
 110  *                      add function to retrive SIFR
 111  *
 112  *      Jul.24, 2004    Hiroshi Miura <[email protected]>
 113  *              - v0.3  get proper status of hotkey
 114  *
 115  *      Jul.22, 2004    Hiroshi Miura <[email protected]>
 116  *              - v0.2  add HotKey handler
 117  *
 118  *      Jul.17, 2004    Hiroshi Miura <[email protected]>
 119  *              - v0.1  start from toshiba_acpi driver written by John Belmonte
 120  */
 121
 122 #include <linux/acpi.h>
 123 #include <linux/backlight.h>
 124 #include <linux/ctype.h>
 125 #include <linux/i8042.h>
 126 #include <linux/init.h>
 127 #include <linux/input.h>
 128 #include <linux/input/sparse-keymap.h>
 129 #include <linux/kernel.h>
 130 #include <linux/module.h>
 131 #include <linux/platform_device.h>
 132 #include <linux/seq_file.h>
 133 #include <linux/serio.h>
 134 #include <linux/slab.h>
 135 #include <linux/types.h>
 136 #include <linux/uaccess.h>
 137 #include <acpi/video.h>
 138
 139 MODULE_AUTHOR("Hiroshi Miura <[email protected]>");
 140 MODULE_AUTHOR("David Bronaugh <[email protected]>");
 141 MODULE_AUTHOR("Harald Welte <[email protected]>");
 142 MODULE_AUTHOR("Martin Lucina <[email protected]>");
 143 MODULE_AUTHOR("Kenneth Chan <[email protected]>");
 144 MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops");
 145 MODULE_LICENSE("GPL");
 146
 147 #define LOGPREFIX "pcc_acpi: "
 148
 149 /* Define ACPI PATHs */
 150 /* Lets note hotkeys */
 151 #define METHOD_HKEY_QUERY       "HINF"
 152 #define METHOD_HKEY_SQTY        "SQTY"
 153 #define METHOD_HKEY_SINF        "SINF"
 154 #define METHOD_HKEY_SSET        "SSET"
 155 #define METHOD_ECWR             "\\_SB.ECWR"
 156 #define HKEY_NOTIFY             0x80
 157 #define ECO_MODE_OFF            0x00
 158 #define ECO_MODE_ON             0x80
 159
 160 #define ACPI_PCC_DRIVER_NAME    "Panasonic Laptop Support"
 161 #define ACPI_PCC_DEVICE_NAME    "Hotkey"
 162 #define ACPI_PCC_CLASS          "pcc"
 163
 164 #define ACPI_PCC_INPUT_PHYS     "panasonic/hkey0"
 165
 166 /* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
 167    ECO_MODEs: 0x03 = off, 0x83 = on
 168 */
 169 enum SINF_BITS { SINF_NUM_BATTERIES = 0,
 170                  SINF_LCD_TYPE,
 171                  SINF_AC_MAX_BRIGHT,
 172                  SINF_AC_MIN_BRIGHT,
 173                  SINF_AC_CUR_BRIGHT,
 174                  SINF_DC_MAX_BRIGHT,
 175                  SINF_DC_MIN_BRIGHT,
 176                  SINF_DC_CUR_BRIGHT,
 177                  SINF_MUTE,
 178                  SINF_RESERVED,
 179                  SINF_ECO_MODE = 0x0A,
 180                  SINF_CUR_BRIGHT = 0x0D,
 181                  SINF_STICKY_KEY = 0x80,
 182         };
 183 /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */
 184
 185 static int acpi_pcc_hotkey_add(struct acpi_device *device);
 186 static int acpi_pcc_hotkey_remove(struct acpi_device *device);
 187 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event);
 188
 189 static const struct acpi_device_id pcc_device_ids[] = {
 190         { "MAT0012", 0},
 191         { "MAT0013", 0},
 192         { "MAT0018", 0},
 193         { "MAT0019", 0},
 194         { "", 0},
 195 };
 196 MODULE_DEVICE_TABLE(acpi, pcc_device_ids);
 197
 198 #ifdef CONFIG_PM_SLEEP
 199 static int acpi_pcc_hotkey_resume(struct device *dev);
 200 #endif
 201 static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume);
 202
 203 static struct acpi_driver acpi_pcc_driver = {
 204         .name =         ACPI_PCC_DRIVER_NAME,
 205         .class =        ACPI_PCC_CLASS,
 206         .ids =          pcc_device_ids,
 207         .ops =          {
 208                                 .add =          acpi_pcc_hotkey_add,
 209                                 .remove =       acpi_pcc_hotkey_remove,
 210                                 .notify =       acpi_pcc_hotkey_notify,
 211                         },
 212         .drv.pm =       &acpi_pcc_hotkey_pm,
 213 };
 214
 215 static const struct key_entry panasonic_keymap[] = {
 216         { KE_KEY, 0, { KEY_RESERVED } },
 217         { KE_KEY, 1, { KEY_BRIGHTNESSDOWN } },
 218         { KE_KEY, 2, { KEY_BRIGHTNESSUP } },
 219         { KE_KEY, 3, { KEY_DISPLAYTOGGLE } },
 220         { KE_KEY, 4, { KEY_MUTE } },
 221         { KE_KEY, 5, { KEY_VOLUMEDOWN } },
 222         { KE_KEY, 6, { KEY_VOLUMEUP } },
 223         { KE_KEY, 7, { KEY_SLEEP } },
 224         { KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */
 225         { KE_KEY, 9, { KEY_BATTERY } },
 226         { KE_KEY, 10, { KEY_SUSPEND } },
 227         { KE_END, 0 }
 228 };
 229
 230 struct pcc_acpi {
 231         acpi_handle             handle;
 232         unsigned long           num_sifr;
 233         int                     sticky_key;
 234         int                     eco_mode;
 235         int                     mute;
 236         int                     ac_brightness;
 237         int                     dc_brightness;
 238         int                     current_brightness;
 239         u32                     *sinf;
 240         struct acpi_device      *device;
 241         struct input_dev        *input_dev;
 242         struct backlight_device *backlight;
 243         struct platform_device  *platform;
 244 };
 245
 246 /*
 247  * On some Panasonic models the volume up / down / mute keys send duplicate
 248  * keypress events over the PS/2 kbd interface, filter these out.
 249  */
 250 static bool panasonic_i8042_filter(unsigned char data, unsigned char str,
 251                                    struct serio *port)
 252 {
 253         static bool extended;
 254
 255         if (str & I8042_STR_AUXDATA)
 256                 return false;
 257
 258         if (data == 0xe0) {
 259                 extended = true;
 260                 return true;
 261         } else if (extended) {
 262                 extended = false;
 263
 264                 switch (data & 0x7f) {
 265                 case 0x20: /* e0 20 / e0 a0, Volume Mute press / release */
 266                 case 0x2e: /* e0 2e / e0 ae, Volume Down press / release */
 267                 case 0x30: /* e0 30 / e0 b0, Volume Up press / release */
 268                         return true;
 269                 default:
 270                         /*
 271                          * Report the previously filtered e0 before continuing
 272                          * with the next non-filtered byte.
 273                          */
 274                         serio_interrupt(port, 0xe0, 0);
 275                         return false;
 276                 }
 277         }
 278
 279         return false;
 280 }
 281
 282 /* method access functions */
 283 static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
 284 {
 285         union acpi_object in_objs[] = {
 286                 { .integer.type  = ACPI_TYPE_INTEGER,
 287                   .integer.value = func, },
 288                 { .integer.type  = ACPI_TYPE_INTEGER,
 289                   .integer.value = val, },
 290         };
 291         struct acpi_object_list params = {
 292                 .count   = ARRAY_SIZE(in_objs),
 293                 .pointer = in_objs,
 294         };
 295         acpi_status status = AE_OK;
 296
 297         status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
 298                                       &params, NULL);
 299
 300         return (status == AE_OK) ? 0 : -EIO;
 301 }
 302
 303 static inline int acpi_pcc_get_sqty(struct acpi_device *device)
 304 {
 305         unsigned long long s;
 306         acpi_status status;
 307
 308         status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
 309                                        NULL, &s);
 310         if (ACPI_SUCCESS(status))
 311                 return s;
 312         else {
 313                 pr_err("evaluation error HKEY.SQTY\n");
 314                 return -EINVAL;
 315         }
 316 }
 317
 318 static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
 319 {
 320         acpi_status status;
 321         struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
 322         union acpi_object *hkey = NULL;
 323         int i;
 324
 325         status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
 326                                       &buffer);
 327         if (ACPI_FAILURE(status)) {
 328                 pr_err("evaluation error HKEY.SINF\n");
 329                 return 0;
 330         }
 331
 332         hkey = buffer.pointer;
 333         if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
 334                 pr_err("Invalid HKEY.SINF\n");
 335                 status = AE_ERROR;
 336                 goto end;
 337         }
 338
 339         if (pcc->num_sifr < hkey->package.count) {
 340                 pr_err("SQTY reports bad SINF length\n");
 341                 status = AE_ERROR;
 342                 goto end;
 343         }
 344
 345         for (i = 0; i < hkey->package.count; i++) {
 346                 union acpi_object *element = &(hkey->package.elements[i]);
 347                 if (likely(element->type == ACPI_TYPE_INTEGER)) {
 348                         pcc->sinf[i] = element->integer.value;
 349                 } else
 350                         pr_err("Invalid HKEY.SINF data\n");
 351         }
 352         pcc->sinf[hkey->package.count] = -1;
 353
 354 end:
 355         kfree(buffer.pointer);
 356         return status == AE_OK;
 357 }
 358
 359 /* backlight API interface functions */
 360
 361 /* This driver currently treats AC and DC brightness identical,
 362  * since we don't need to invent an interface to the core ACPI
 363  * logic to receive events in case a power supply is plugged in
 364  * or removed */
 365
 366 static int bl_get(struct backlight_device *bd)
 367 {
 368         struct pcc_acpi *pcc = bl_get_data(bd);
 369
 370         if (!acpi_pcc_retrieve_biosdata(pcc))
 371                 return -EIO;
 372
 373         return pcc->sinf[SINF_AC_CUR_BRIGHT];
 374 }
 375
 376 static int bl_set_status(struct backlight_device *bd)
 377 {
 378         struct pcc_acpi *pcc = bl_get_data(bd);
 379         int bright = bd->props.brightness;
 380         int rc;
 381
 382         if (!acpi_pcc_retrieve_biosdata(pcc))
 383                 return -EIO;
 384
 385         if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])
 386                 bright = pcc->sinf[SINF_AC_MIN_BRIGHT];
 387
 388         if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])
 389                 bright = pcc->sinf[SINF_DC_MIN_BRIGHT];
 390
 391         if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||
 392             bright > pcc->sinf[SINF_AC_MAX_BRIGHT])
 393                 return -EINVAL;
 394
 395         rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);
 396         if (rc < 0)
 397                 return rc;
 398
 399         return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);
 400 }
 401
 402 static const struct backlight_ops pcc_backlight_ops = {
 403         .get_brightness = bl_get,
 404         .update_status  = bl_set_status,
 405 };
 406
 407
 408 /* returns ACPI_SUCCESS if methods to control optical drive are present */
 409
 410 static acpi_status check_optd_present(void)
 411 {
 412         acpi_status status = AE_OK;
 413         acpi_handle handle;
 414
 415         status = acpi_get_handle(NULL, "\\_SB.STAT", &handle);
 416         if (ACPI_FAILURE(status))
 417                 goto out;
 418         status = acpi_get_handle(NULL, "\\_SB.FBAY", &handle);
 419         if (ACPI_FAILURE(status))
 420                 goto out;
 421         status = acpi_get_handle(NULL, "\\_SB.CDDI", &handle);
 422         if (ACPI_FAILURE(status))
 423                 goto out;
 424
 425 out:
 426         return status;
 427 }
 428
 429 /* get optical driver power state */
 430
 431 static int get_optd_power_state(void)
 432 {
 433         acpi_status status;
 434         unsigned long long state;
 435         int result;
 436
 437         status = acpi_evaluate_integer(NULL, "\\_SB.STAT", NULL, &state);
 438         if (ACPI_FAILURE(status)) {
 439                 pr_err("evaluation error _SB.STAT\n");
 440                 result = -EIO;
 441                 goto out;
 442         }
 443         switch (state) {
 444         case 0: /* power off */
 445                 result = 0;
 446                 break;
 447         case 0x0f: /* power on */
 448                 result = 1;
 449                 break;
 450         default:
 451                 result = -EIO;
 452                 break;
 453         }
 454
 455 out:
 456         return result;
 457 }
 458
 459 /* set optical drive power state */
 460
 461 static int set_optd_power_state(int new_state)
 462 {
 463         int result;
 464         acpi_status status;
 465
 466         result = get_optd_power_state();
 467         if (result < 0)
 468                 goto out;
 469         if (new_state == result)
 470                 goto out;
 471
 472         switch (new_state) {
 473         case 0: /* power off */
 474                 /* Call CDDR instead, since they both call the same method
 475                  * while CDDI takes 1 arg and we are not quite sure what it is.
 476                  */
 477                 status = acpi_evaluate_object(NULL, "\\_SB.CDDR", NULL, NULL);
 478                 if (ACPI_FAILURE(status)) {
 479                         pr_err("evaluation error _SB.CDDR\n");
 480                         result = -EIO;
 481                 }
 482                 break;
 483         case 1: /* power on */
 484                 status = acpi_evaluate_object(NULL, "\\_SB.FBAY", NULL, NULL);
 485                 if (ACPI_FAILURE(status)) {
 486                         pr_err("evaluation error _SB.FBAY\n");
 487                         result = -EIO;
 488                 }
 489                 break;
 490         default:
 491                 result = -EINVAL;
 492                 break;
 493         }
 494
 495 out:
 496         return result;
 497 }
 498
 499
 500 /* sysfs user interface functions */
 501
 502 static ssize_t numbatt_show(struct device *dev, struct device_attribute *attr,
 503                             char *buf)
 504 {
 505         struct acpi_device *acpi = to_acpi_device(dev);
 506         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 507
 508         if (!acpi_pcc_retrieve_biosdata(pcc))
 509                 return -EIO;
 510
 511         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
 512 }
 513
 514 static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr,
 515                             char *buf)
 516 {
 517         struct acpi_device *acpi = to_acpi_device(dev);
 518         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 519
 520         if (!acpi_pcc_retrieve_biosdata(pcc))
 521                 return -EIO;
 522
 523         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
 524 }
 525
 526 static ssize_t mute_show(struct device *dev, struct device_attribute *attr,
 527                          char *buf)
 528 {
 529         struct acpi_device *acpi = to_acpi_device(dev);
 530         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 531
 532         if (!acpi_pcc_retrieve_biosdata(pcc))
 533                 return -EIO;
 534
 535         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_MUTE]);
 536 }
 537
 538 static ssize_t mute_store(struct device *dev, struct device_attribute *attr,
 539                           const char *buf, size_t count)
 540 {
 541         struct acpi_device *acpi = to_acpi_device(dev);
 542         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 543         int err, val;
 544
 545         err = kstrtoint(buf, 0, &val);
 546         if (err)
 547                 return err;
 548         if (val == 0 || val == 1) {
 549                 acpi_pcc_write_sset(pcc, SINF_MUTE, val);
 550                 pcc->mute = val;
 551         }
 552
 553         return count;
 554 }
 555
 556 static ssize_t sticky_key_show(struct device *dev, struct device_attribute *attr,
 557                            char *buf)
 558 {
 559         struct acpi_device *acpi = to_acpi_device(dev);
 560         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 561
 562         if (!acpi_pcc_retrieve_biosdata(pcc))
 563                 return -EIO;
 564
 565         return sysfs_emit(buf, "%u\n", pcc->sticky_key);
 566 }
 567
 568 static ssize_t sticky_key_store(struct device *dev, struct device_attribute *attr,
 569                           const char *buf, size_t count)
 570 {
 571         struct acpi_device *acpi = to_acpi_device(dev);
 572         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 573         int err, val;
 574
 575         err = kstrtoint(buf, 0, &val);
 576         if (err)
 577                 return err;
 578         if (val == 0 || val == 1) {
 579                 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);
 580                 pcc->sticky_key = val;
 581         }
 582
 583         return count;
 584 }
 585
 586 static ssize_t eco_mode_show(struct device *dev, struct device_attribute *attr,
 587                                 char *buf)
 588 {
 589         struct acpi_device *acpi = to_acpi_device(dev);
 590         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 591         int result;
 592
 593         if (!acpi_pcc_retrieve_biosdata(pcc))
 594                 return -EIO;
 595
 596         switch (pcc->sinf[SINF_ECO_MODE]) {
 597         case (ECO_MODE_OFF + 3):
 598                 result = 0;
 599                 break;
 600         case (ECO_MODE_ON + 3):
 601                 result = 1;
 602                 break;
 603         default:
 604                 result = -EIO;
 605                 break;
 606         }
 607         return sysfs_emit(buf, "%u\n", result);
 608 }
 609
 610 static ssize_t eco_mode_store(struct device *dev, struct device_attribute *attr,
 611                           const char *buf, size_t count)
 612 {
 613         struct acpi_device *acpi = to_acpi_device(dev);
 614         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 615         int err, state;
 616
 617         union acpi_object param[2];
 618         struct acpi_object_list input;
 619         acpi_status status;
 620
 621         param[0].type = ACPI_TYPE_INTEGER;
 622         param[0].integer.value = 0x15;
 623         param[1].type = ACPI_TYPE_INTEGER;
 624         input.count = 2;
 625         input.pointer = param;
 626
 627         err = kstrtoint(buf, 0, &state);
 628         if (err)
 629                 return err;
 630
 631         switch (state) {
 632         case 0:
 633                 param[1].integer.value = ECO_MODE_OFF;
 634                 pcc->sinf[SINF_ECO_MODE] = 0;
 635                 pcc->eco_mode = 0;
 636                 break;
 637         case 1:
 638                 param[1].integer.value = ECO_MODE_ON;
 639                 pcc->sinf[SINF_ECO_MODE] = 1;
 640                 pcc->eco_mode = 1;
 641                 break;
 642         default:
 643                 /* nothing to do */
 644                 return count;
 645         }
 646
 647         status = acpi_evaluate_object(NULL, METHOD_ECWR,
 648                                        &input, NULL);
 649         if (ACPI_FAILURE(status)) {
 650                 pr_err("%s evaluation failed\n", METHOD_ECWR);
 651                 return -EINVAL;
 652         }
 653
 654         return count;
 655 }
 656
 657 static ssize_t ac_brightness_show(struct device *dev, struct device_attribute *attr,
 658                                   char *buf)
 659 {
 660         struct acpi_device *acpi = to_acpi_device(dev);
 661         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 662
 663         if (!acpi_pcc_retrieve_biosdata(pcc))
 664                 return -EIO;
 665
 666         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]);
 667 }
 668
 669 static ssize_t ac_brightness_store(struct device *dev, struct device_attribute *attr,
 670                                    const char *buf, size_t count)
 671 {
 672         struct acpi_device *acpi = to_acpi_device(dev);
 673         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 674         int err, val;
 675
 676         err = kstrtoint(buf, 0, &val);
 677         if (err)
 678                 return err;
 679         if (val >= 0 && val <= 255) {
 680                 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, val);
 681                 pcc->ac_brightness = val;
 682         }
 683
 684         return count;
 685 }
 686
 687 static ssize_t dc_brightness_show(struct device *dev, struct device_attribute *attr,
 688                                   char *buf)
 689 {
 690         struct acpi_device *acpi = to_acpi_device(dev);
 691         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 692
 693         if (!acpi_pcc_retrieve_biosdata(pcc))
 694                 return -EIO;
 695
 696         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]);
 697 }
 698
 699 static ssize_t dc_brightness_store(struct device *dev, struct device_attribute *attr,
 700                                    const char *buf, size_t count)
 701 {
 702         struct acpi_device *acpi = to_acpi_device(dev);
 703         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 704         int err, val;
 705
 706         err = kstrtoint(buf, 0, &val);
 707         if (err)
 708                 return err;
 709         if (val >= 0 && val <= 255) {
 710                 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, val);
 711                 pcc->dc_brightness = val;
 712         }
 713
 714         return count;
 715 }
 716
 717 static ssize_t current_brightness_show(struct device *dev, struct device_attribute *attr,
 718                                        char *buf)
 719 {
 720         struct acpi_device *acpi = to_acpi_device(dev);
 721         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 722
 723         if (!acpi_pcc_retrieve_biosdata(pcc))
 724                 return -EIO;
 725
 726         return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]);
 727 }
 728
 729 static ssize_t current_brightness_store(struct device *dev, struct device_attribute *attr,
 730                                         const char *buf, size_t count)
 731 {
 732         struct acpi_device *acpi = to_acpi_device(dev);
 733         struct pcc_acpi *pcc = acpi_driver_data(acpi);
 734         int err, val;
 735
 736         err = kstrtoint(buf, 0, &val);
 737         if (err)
 738                 return err;
 739
 740         if (val >= 0 && val <= 255) {
 741                 err = acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, val);
 742                 pcc->current_brightness = val;
 743         }
 744
 745         return count;
 746 }
 747
 748 static ssize_t cdpower_show(struct device *dev, struct device_attribute *attr,
 749                             char *buf)
 750 {
 751         return sysfs_emit(buf, "%d\n", get_optd_power_state());
 752 }
 753
 754 static ssize_t cdpower_store(struct device *dev, struct device_attribute *attr,
 755                            const char *buf, size_t count)
 756 {
 757         int err, val;
 758
 759         err = kstrtoint(buf, 10, &val);
 760         if (err)
 761                 return err;
 762         set_optd_power_state(val);
 763         return count;
 764 }
 765
 766 static DEVICE_ATTR_RO(numbatt);
 767 static DEVICE_ATTR_RO(lcdtype);
 768 static DEVICE_ATTR_RW(mute);
 769 static DEVICE_ATTR_RW(sticky_key);
 770 static DEVICE_ATTR_RW(eco_mode);
 771 static DEVICE_ATTR_RW(ac_brightness);
 772 static DEVICE_ATTR_RW(dc_brightness);
 773 static DEVICE_ATTR_RW(current_brightness);
 774 static DEVICE_ATTR_RW(cdpower);
 775
 776 static struct attribute *pcc_sysfs_entries[] = {
 777         &dev_attr_numbatt.attr,
 778         &dev_attr_lcdtype.attr,
 779         &dev_attr_mute.attr,
 780         &dev_attr_sticky_key.attr,
 781         &dev_attr_eco_mode.attr,
 782         &dev_attr_ac_brightness.attr,
 783         &dev_attr_dc_brightness.attr,
 784         &dev_attr_current_brightness.attr,
 785         &dev_attr_cdpower.attr,
 786         NULL,
 787 };
 788
 789 static const struct attribute_group pcc_attr_group = {
 790         .name   = NULL,         /* put in device directory */
 791         .attrs  = pcc_sysfs_entries,
 792 };
 793
 794
 795 /* hotkey input device driver */
 796
 797 static int sleep_keydown_seen;
 798 static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
 799 {
 800         struct input_dev *hotk_input_dev = pcc->input_dev;
 801         int rc;
 802         unsigned long long result;
 803         unsigned int key;
 804         unsigned int updown;
 805
 806         rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
 807                                    NULL, &result);
 808         if (ACPI_FAILURE(rc)) {
 809                 pr_err("error getting hotkey status\n");
 810                 return;
 811         }
 812
 813         key = result & 0xf;
 814         updown = result & 0x80; /* 0x80 == key down; 0x00 = key up */
 815
 816         /* hack: some firmware sends no key down for sleep / hibernate */
 817         if (key == 7 || key == 10) {
 818                 if (updown)
 819                         sleep_keydown_seen = 1;
 820                 if (!sleep_keydown_seen)
 821                         sparse_keymap_report_event(hotk_input_dev,
 822                                         key, 0x80, false);
 823         }
 824
 825         /*
 826          * Don't report brightness key-presses if they are also reported
 827          * by the ACPI video bus.
 828          */
 829         if ((key == 1 || key == 2) && acpi_video_handles_brightness_key_presses())
 830                 return;
 831
 832         if (!sparse_keymap_report_event(hotk_input_dev, key, updown, false))
 833                 pr_err("Unknown hotkey event: 0x%04llx\n", result);
 834 }
 835
 836 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)
 837 {
 838         struct pcc_acpi *pcc = acpi_driver_data(device);
 839
 840         switch (event) {
 841         case HKEY_NOTIFY:
 842                 acpi_pcc_generate_keyinput(pcc);
 843                 break;
 844         default:
 845                 /* nothing to do */
 846                 break;
 847         }
 848 }
 849
 850 static void pcc_optd_notify(acpi_handle handle, u32 event, void *data)
 851 {
 852         if (event != ACPI_NOTIFY_EJECT_REQUEST)
 853                 return;
 854
 855         set_optd_power_state(0);
 856 }
 857
 858 static int pcc_register_optd_notifier(struct pcc_acpi *pcc, char *node)
 859 {
 860         acpi_status status;
 861         acpi_handle handle;
 862
 863         status = acpi_get_handle(NULL, node, &handle);
 864
 865         if (ACPI_SUCCESS(status)) {
 866                 status = acpi_install_notify_handler(handle,
 867                                 ACPI_SYSTEM_NOTIFY,
 868                                 pcc_optd_notify, pcc);
 869                 if (ACPI_FAILURE(status))
 870                         pr_err("Failed to register notify on %s\n", node);
 871         } else
 872                 return -ENODEV;
 873
 874         return 0;
 875 }
 876
 877 static void pcc_unregister_optd_notifier(struct pcc_acpi *pcc, char *node)
 878 {
 879         acpi_status status = AE_OK;
 880         acpi_handle handle;
 881
 882         status = acpi_get_handle(NULL, node, &handle);
 883
 884         if (ACPI_SUCCESS(status)) {
 885                 status = acpi_remove_notify_handler(handle,
 886                                 ACPI_SYSTEM_NOTIFY,
 887                                 pcc_optd_notify);
 888                 if (ACPI_FAILURE(status))
 889                         pr_err("Error removing optd notify handler %s\n",
 890                                         node);
 891         }
 892 }
 893
 894 static int acpi_pcc_init_input(struct pcc_acpi *pcc)
 895 {
 896         struct input_dev *input_dev;
 897         int error;
 898
 899         input_dev = input_allocate_device();
 900         if (!input_dev)
 901                 return -ENOMEM;
 902
 903         input_dev->name = ACPI_PCC_DRIVER_NAME;
 904         input_dev->phys = ACPI_PCC_INPUT_PHYS;
 905         input_dev->id.bustype = BUS_HOST;
 906         input_dev->id.vendor = 0x0001;
 907         input_dev->id.product = 0x0001;
 908         input_dev->id.version = 0x0100;
 909
 910         error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL);
 911         if (error) {
 912                 pr_err("Unable to setup input device keymap\n");
 913                 goto err_free_dev;
 914         }
 915
 916         error = input_register_device(input_dev);
 917         if (error) {
 918                 pr_err("Unable to register input device\n");
 919                 goto err_free_dev;
 920         }
 921
 922         pcc->input_dev = input_dev;
 923         return 0;
 924
 925  err_free_dev:
 926         input_free_device(input_dev);
 927         return error;
 928 }
 929
 930 /* kernel module interface */
 931
 932 #ifdef CONFIG_PM_SLEEP
 933 static int acpi_pcc_hotkey_resume(struct device *dev)
 934 {
 935         struct pcc_acpi *pcc;
 936
 937         if (!dev)
 938                 return -EINVAL;
 939
 940         pcc = acpi_driver_data(to_acpi_device(dev));
 941         if (!pcc)
 942                 return -EINVAL;
 943
 944         acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute);
 945         acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode);
 946         acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key);
 947         acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, pcc->ac_brightness);
 948         acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, pcc->dc_brightness);
 949         acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, pcc->current_brightness);
 950
 951         return 0;
 952 }
 953 #endif
 954
 955 static int acpi_pcc_hotkey_add(struct acpi_device *device)
 956 {
 957         struct backlight_properties props;
 958         struct pcc_acpi *pcc;
 959         int num_sifr, result;
 960
 961         if (!device)
 962                 return -EINVAL;
 963
 964         num_sifr = acpi_pcc_get_sqty(device);
 965
 966         if (num_sifr < 0 || num_sifr > 255) {
 967                 pr_err("num_sifr out of range");
 968                 return -ENODEV;
 969         }
 970
 971         pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
 972         if (!pcc) {
 973                 pr_err("Couldn't allocate mem for pcc");
 974                 return -ENOMEM;
 975         }
 976
 977         pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL);
 978         if (!pcc->sinf) {
 979                 result = -ENOMEM;
 980                 goto out_hotkey;
 981         }
 982
 983         pcc->device = device;
 984         pcc->handle = device->handle;
 985         pcc->num_sifr = num_sifr;
 986         device->driver_data = pcc;
 987         strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME);
 988         strcpy(acpi_device_class(device), ACPI_PCC_CLASS);
 989
 990         result = acpi_pcc_init_input(pcc);
 991         if (result) {
 992                 pr_err("Error installing keyinput handler\n");
 993                 goto out_sinf;
 994         }
 995
 996         if (!acpi_pcc_retrieve_biosdata(pcc)) {
 997                 result = -EIO;
 998                 pr_err("Couldn't retrieve BIOS data\n");
 999                 goto out_input;
1000         }
1001
1002         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1003                 /* initialize backlight */
1004                 memset(&props, 0, sizeof(struct backlight_properties));
1005                 props.type = BACKLIGHT_PLATFORM;
1006                 props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];
1007
1008                 pcc->backlight = backlight_device_register("panasonic", NULL, pcc,
1009                                                            &pcc_backlight_ops, &props);
1010                 if (IS_ERR(pcc->backlight)) {
1011                         result = PTR_ERR(pcc->backlight);
1012                         goto out_input;
1013                 }
1014
1015                 /* read the initial brightness setting from the hardware */
1016                 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
1017         }
1018
1019         /* Reset initial sticky key mode since the hardware register state is not consistent */
1020         acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, 0);
1021         pcc->sticky_key = 0;
1022
1023         pcc->eco_mode = pcc->sinf[SINF_ECO_MODE];
1024         pcc->mute = pcc->sinf[SINF_MUTE];
1025         pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
1026         pcc->dc_brightness = pcc->sinf[SINF_DC_CUR_BRIGHT];
1027         pcc->current_brightness = pcc->sinf[SINF_CUR_BRIGHT];
1028
1029         /* add sysfs attributes */
1030         result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group);
1031         if (result)
1032                 goto out_backlight;
1033
1034         /* optical drive initialization */
1035         if (ACPI_SUCCESS(check_optd_present())) {
1036                 pcc->platform = platform_device_register_simple("panasonic",
1037                         PLATFORM_DEVID_NONE, NULL, 0);
1038                 if (IS_ERR(pcc->platform)) {
1039                         result = PTR_ERR(pcc->platform);
1040                         goto out_backlight;
1041                 }
1042                 result = device_create_file(&pcc->platform->dev,
1043                         &dev_attr_cdpower);
1044                 pcc_register_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
1045                 if (result)
1046                         goto out_platform;
1047         } else {
1048                 pcc->platform = NULL;
1049         }
1050
1051         i8042_install_filter(panasonic_i8042_filter);
1052         return 0;
1053
1054 out_platform:
1055         platform_device_unregister(pcc->platform);
1056 out_backlight:
1057         backlight_device_unregister(pcc->backlight);
1058 out_input:
1059         input_unregister_device(pcc->input_dev);
1060 out_sinf:
1061         kfree(pcc->sinf);
1062 out_hotkey:
1063         kfree(pcc);
1064
1065         return result;
1066 }
1067
1068 static int acpi_pcc_hotkey_remove(struct acpi_device *device)
1069 {
1070         struct pcc_acpi *pcc = acpi_driver_data(device);
1071
1072         if (!device || !pcc)
1073                 return -EINVAL;
1074
1075         i8042_remove_filter(panasonic_i8042_filter);
1076
1077         if (pcc->platform) {
1078                 device_remove_file(&pcc->platform->dev, &dev_attr_cdpower);
1079                 platform_device_unregister(pcc->platform);
1080         }
1081         pcc_unregister_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
1082
1083         sysfs_remove_group(&device->dev.kobj, &pcc_attr_group);
1084
1085         backlight_device_unregister(pcc->backlight);
1086
1087         input_unregister_device(pcc->input_dev);
1088
1089         kfree(pcc->sinf);
1090         kfree(pcc);
1091
1092         return 0;
1093 }
1094
1095 module_acpi_driver(acpi_pcc_driver);