sys/dev/acpi_support/acpi_hp.c

   1 /*-
   2  * Copyright (c) 2009 Michael Gmelin <freebsd@grem.de>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 /*
  31  * Driver for extra ACPI-controlled features found on HP laptops
  32  * that use a WMI enabled BIOS (e.g. HP Compaq 8510p and 6510p).
  33  * Allows to control and read status of integrated hardware and read
  34  * BIOS settings through CMI.
  35  * Inspired by the hp-wmi driver, which implements a subset of these
  36  * features (hotkeys) on Linux.
  37  *
  38  * HP CMI whitepaper:
  39  *     http://h20331.www2.hp.com/Hpsub/downloads/cmi_whitepaper.pdf
  40  * wmi-hp for Linux:
  41  *     http://www.kernel.org
  42  * WMI and ACPI:
  43  *     http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx
  44  */
  45
  46 #include "opt_acpi.h"
  47 #include <sys/param.h>
  48 #include <sys/conf.h>
  49 #include <sys/uio.h>
  50 #include <sys/proc.h>
  51 #include <sys/kernel.h>
  52 #include <sys/bus.h>
  53 #include <sys/sbuf.h>
  54 #include <sys/module.h>
  55 #include <sys/sysctl.h>
  56
  57 #include <contrib/dev/acpica/include/acpi.h>
  58 #include <contrib/dev/acpica/include/accommon.h>
  59 #include <dev/acpica/acpivar.h>
  60 #include "acpi_wmi_if.h"
  61
  62 #define _COMPONENT      ACPI_OEM
  63 ACPI_MODULE_NAME("HP")
  64
  65 #define ACPI_HP_WMI_EVENT_GUID          "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  66 #define ACPI_HP_WMI_BIOS_GUID           "5FB7F034-2C63-45E9-BE91-3D44E2C707E4"
  67 #define ACPI_HP_WMI_CMI_GUID            "2D114B49-2DFB-4130-B8FE-4A3C09E75133"
  68
  69 #define ACPI_HP_WMI_DISPLAY_COMMAND     0x1
  70 #define ACPI_HP_WMI_HDDTEMP_COMMAND     0x2
  71 #define ACPI_HP_WMI_ALS_COMMAND         0x3
  72 #define ACPI_HP_WMI_DOCK_COMMAND        0x4
  73 #define ACPI_HP_WMI_WIRELESS_COMMAND    0x5
  74
  75 #define ACPI_HP_METHOD_WLAN_ENABLED                     1
  76 #define ACPI_HP_METHOD_WLAN_RADIO                       2
  77 #define ACPI_HP_METHOD_WLAN_ON_AIR                      3
  78 #define ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON          4
  79 #define ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF        5
  80 #define ACPI_HP_METHOD_BLUETOOTH_ENABLED                6
  81 #define ACPI_HP_METHOD_BLUETOOTH_RADIO                  7
  82 #define ACPI_HP_METHOD_BLUETOOTH_ON_AIR                 8
  83 #define ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON     9
  84 #define ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF   10
  85 #define ACPI_HP_METHOD_WWAN_ENABLED                     11
  86 #define ACPI_HP_METHOD_WWAN_RADIO                       12
  87 #define ACPI_HP_METHOD_WWAN_ON_AIR                      13
  88 #define ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON          14
  89 #define ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF        15
  90 #define ACPI_HP_METHOD_ALS                              16
  91 #define ACPI_HP_METHOD_DISPLAY                          17
  92 #define ACPI_HP_METHOD_HDDTEMP                          18
  93 #define ACPI_HP_METHOD_DOCK                             19
  94 #define ACPI_HP_METHOD_CMI_DETAIL                       20
  95 #define ACPI_HP_METHOD_VERBOSE                          21
  96
  97 #define HP_MASK_WWAN_ON_AIR                     0x1000000
  98 #define HP_MASK_BLUETOOTH_ON_AIR                0x10000
  99 #define HP_MASK_WLAN_ON_AIR                     0x100
 100 #define HP_MASK_WWAN_RADIO                      0x8000000
 101 #define HP_MASK_BLUETOOTH_RADIO                 0x80000
 102 #define HP_MASK_WLAN_RADIO                      0x800
 103 #define HP_MASK_WWAN_ENABLED                    0x2000000
 104 #define HP_MASK_BLUETOOTH_ENABLED               0x20000
 105 #define HP_MASK_WLAN_ENABLED                    0x200
 106
 107 #define ACPI_HP_CMI_DETAIL_PATHS                0x01
 108 #define ACPI_HP_CMI_DETAIL_ENUMS                0x02
 109 #define ACPI_HP_CMI_DETAIL_FLAGS                0x04
 110 #define ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE    0x08
 111
 112 struct acpi_hp_inst_seq_pair {
 113         UINT32  sequence;       /* sequence number as suggested by cmi bios */
 114         UINT8   instance;       /* object instance on guid */
 115 };
 116
 117 struct acpi_hp_softc {
 118         device_t        dev;
 119         device_t        wmi_dev;
 120         int             has_notify;             /* notification GUID found */
 121         int             has_cmi;                /* CMI GUID found */
 122         int             cmi_detail;             /* CMI detail level
 123                                                    (set by sysctl) */
 124         int             verbose;                /* add debug output */
 125         int             wlan_enable_if_radio_on;        /* set by sysctl */
 126         int             wlan_disable_if_radio_off;      /* set by sysctl */
 127         int             bluetooth_enable_if_radio_on;   /* set by sysctl */
 128         int             bluetooth_disable_if_radio_off; /* set by sysctl */
 129         int             wwan_enable_if_radio_on;        /* set by sysctl */
 130         int             wwan_disable_if_radio_off;      /* set by sysctl */
 131         int             was_wlan_on_air;                /* last known WLAN
 132                                                            on air status */
 133         int             was_bluetooth_on_air;           /* last known BT
 134                                                            on air status */
 135         int             was_wwan_on_air;                /* last known WWAN
 136                                                            on air status */
 137         struct sysctl_ctx_list  *sysctl_ctx;
 138         struct sysctl_oid       *sysctl_tree;
 139         struct cdev     *hpcmi_dev_t;           /* hpcmi device handle */
 140         struct sbuf     hpcmi_sbuf;             /* /dev/hpcmi output sbuf */
 141         pid_t           hpcmi_open_pid;         /* pid operating on
 142                                                    /dev/hpcmi */
 143         int             hpcmi_bufptr;           /* current pointer position
 144                                                    in /dev/hpcmi output buffer
 145                                                  */
 146         int             cmi_order_size;         /* size of cmi_order list */
 147         struct acpi_hp_inst_seq_pair cmi_order[128];    /* list of CMI
 148                              instances ordered by BIOS suggested sequence */
 149 };
 150
 151 static struct {
 152         char    *name;
 153         int     method;
 154         char    *description;
 155         int     flag_rdonly;
 156 } acpi_hp_sysctls[] = {
 157         {
 158                 .name           = "wlan_enabled",
 159                 .method         = ACPI_HP_METHOD_WLAN_ENABLED,
 160                 .description    = "Enable/Disable WLAN (WiFi)",
 161         },
 162         {
 163                 .name           = "wlan_radio",
 164                 .method         = ACPI_HP_METHOD_WLAN_RADIO,
 165                 .description    = "WLAN radio status",
 166                 .flag_rdonly    = 1
 167         },
 168         {
 169                 .name           = "wlan_on_air",
 170                 .method         = ACPI_HP_METHOD_WLAN_ON_AIR,
 171                 .description    = "WLAN radio ready to use (enabled and radio)",
 172                 .flag_rdonly    = 1
 173         },
 174         {
 175                 .name           = "wlan_enable_if_radio_on",
 176                 .method         = ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON,
 177                 .description    = "Enable WLAN if radio is turned on",
 178         },
 179         {
 180                 .name           = "wlan_disable_if_radio_off",
 181                 .method         = ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF,
 182                 .description    = "Disable WLAN if radio is turned off",
 183         },
 184         {
 185                 .name           = "bt_enabled",
 186                 .method         = ACPI_HP_METHOD_BLUETOOTH_ENABLED,
 187                 .description    = "Enable/Disable Bluetooth",
 188         },
 189         {
 190                 .name           = "bt_radio",
 191                 .method         = ACPI_HP_METHOD_BLUETOOTH_RADIO,
 192                 .description    = "Bluetooth radio status",
 193                 .flag_rdonly    = 1
 194         },
 195         {
 196                 .name           = "bt_on_air",
 197                 .method         = ACPI_HP_METHOD_BLUETOOTH_ON_AIR,
 198                 .description    = "Bluetooth radio ready to use"
 199                                     " (enabled and radio)",
 200                 .flag_rdonly    = 1
 201         },
 202         {
 203                 .name           = "bt_enable_if_radio_on",
 204                 .method         = ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON,
 205                 .description    = "Enable bluetooth if radio is turned on",
 206         },
 207         {
 208                 .name           = "bt_disable_if_radio_off",
 209                 .method         = ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF,
 210                 .description    = "Disable bluetooth if radio is turned off",
 211         },
 212         {
 213                 .name           = "wwan_enabled",
 214                 .method         = ACPI_HP_METHOD_WWAN_ENABLED,
 215                 .description    = "Enable/Disable WWAN (UMTS)",
 216         },
 217         {
 218                 .name           = "wwan_radio",
 219                 .method         = ACPI_HP_METHOD_WWAN_RADIO,
 220                 .description    = "WWAN radio status",
 221                 .flag_rdonly    = 1
 222         },
 223         {
 224                 .name           = "wwan_on_air",
 225                 .method         = ACPI_HP_METHOD_WWAN_ON_AIR,
 226                 .description    = "WWAN radio ready to use (enabled and radio)",
 227                 .flag_rdonly    = 1
 228         },
 229         {
 230                 .name           = "wwan_enable_if_radio_on",
 231                 .method         = ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON,
 232                 .description    = "Enable WWAN if radio is turned on",
 233         },
 234         {
 235                 .name           = "wwan_disable_if_radio_off",
 236                 .method         = ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF,
 237                 .description    = "Disable WWAN if radio is turned off",
 238         },
 239         {
 240                 .name           = "als_enabled",
 241                 .method         = ACPI_HP_METHOD_ALS,
 242                 .description    = "Enable/Disable ALS (Ambient light sensor)",
 243         },
 244         {
 245                 .name           = "display",
 246                 .method         = ACPI_HP_METHOD_DISPLAY,
 247                 .description    = "Display status",
 248                 .flag_rdonly    = 1
 249         },
 250         {
 251                 .name           = "hdd_temperature",
 252                 .method         = ACPI_HP_METHOD_HDDTEMP,
 253                 .description    = "HDD temperature",
 254                 .flag_rdonly    = 1
 255         },
 256         {
 257                 .name           = "is_docked",
 258                 .method         = ACPI_HP_METHOD_DOCK,
 259                 .description    = "Docking station status",
 260                 .flag_rdonly    = 1
 261         },
 262         {
 263                 .name           = "cmi_detail",
 264                 .method         = ACPI_HP_METHOD_CMI_DETAIL,
 265                 .description    = "Details shown in CMI output "
 266                                     "(cat /dev/hpcmi)",
 267         },
 268         {
 269                 .name           = "verbose",
 270                 .method         = ACPI_HP_METHOD_VERBOSE,
 271                 .description    = "Verbosity level",
 272         },
 273
 274         { NULL, 0, NULL, 0 }
 275 };
 276
 277 ACPI_SERIAL_DECL(hp, "HP ACPI-WMI Mapping");
 278
 279 static void     acpi_hp_identify(driver_t *driver, device_t parent);
 280 static int      acpi_hp_probe(device_t dev);
 281 static int      acpi_hp_attach(device_t dev);
 282 static int      acpi_hp_detach(device_t dev);
 283
 284 static void     acpi_hp_evaluate_auto_on_off(struct acpi_hp_softc* sc);
 285 static int      acpi_hp_sysctl(SYSCTL_HANDLER_ARGS);
 286 static int      acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method,
 287                     int arg, int oldarg);
 288 static int      acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method);
 289 static int      acpi_hp_exec_wmi_command(device_t wmi_dev, int command,
 290                     int is_write, int val);
 291 static void     acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context);
 292 static int      acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid,
 293                     UINT8 instance, char* outbuf, size_t outsize,
 294                     UINT32* sequence, int detail);
 295 static void     acpi_hp_hex_decode(char* buffer);
 296
 297 static d_open_t acpi_hp_hpcmi_open;
 298 static d_close_t acpi_hp_hpcmi_close;
 299 static d_read_t acpi_hp_hpcmi_read;
 300
 301 /* handler /dev/hpcmi device */
 302 static struct cdevsw hpcmi_cdevsw = {
 303         .d_version = D_VERSION,
 304         .d_open = acpi_hp_hpcmi_open,
 305         .d_close = acpi_hp_hpcmi_close,
 306         .d_read = acpi_hp_hpcmi_read,
 307         .d_name = "hpcmi",
 308 };
 309
 310 static device_method_t acpi_hp_methods[] = {
 311         DEVMETHOD(device_identify, acpi_hp_identify),
 312         DEVMETHOD(device_probe, acpi_hp_probe),
 313         DEVMETHOD(device_attach, acpi_hp_attach),
 314         DEVMETHOD(device_detach, acpi_hp_detach),
 315
 316         DEVMETHOD_END
 317 };
 318
 319 static driver_t acpi_hp_driver = {
 320         "acpi_hp",
 321         acpi_hp_methods,
 322         sizeof(struct acpi_hp_softc),
 323 };
 324
 325 static devclass_t acpi_hp_devclass;
 326
 327 DRIVER_MODULE(acpi_hp, acpi_wmi, acpi_hp_driver, acpi_hp_devclass,
 328                 0, 0);
 329 MODULE_DEPEND(acpi_hp, acpi_wmi, 1, 1, 1);
 330 MODULE_DEPEND(acpi_hp, acpi, 1, 1, 1);
 331
 332 static void
 333 acpi_hp_evaluate_auto_on_off(struct acpi_hp_softc *sc)
 334 {
 335         int     wireless;
 336         int     new_wlan_status;
 337         int     new_bluetooth_status;
 338         int     new_wwan_status;
 339
 340         wireless = acpi_hp_exec_wmi_command(sc->wmi_dev,
 341                     ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 342         new_wlan_status = -1;
 343         new_bluetooth_status = -1;
 344         new_wwan_status = -1;
 345
 346         if (sc->verbose)
 347                 device_printf(sc->wmi_dev, "Wireless status is %x\n", wireless);
 348         if (sc->wlan_disable_if_radio_off && !(wireless & HP_MASK_WLAN_RADIO)
 349             &&  (wireless & HP_MASK_WLAN_ENABLED)) {
 350                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 351                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x100);
 352                 new_wlan_status = 0;
 353         }
 354         else if (sc->wlan_enable_if_radio_on && (wireless & HP_MASK_WLAN_RADIO)
 355                 &&  !(wireless & HP_MASK_WLAN_ENABLED)) {
 356                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 357                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x101);
 358                 new_wlan_status = 1;
 359         }
 360         if (sc->bluetooth_disable_if_radio_off &&
 361             !(wireless & HP_MASK_BLUETOOTH_RADIO) &&
 362             (wireless & HP_MASK_BLUETOOTH_ENABLED)) {
 363                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 364                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x200);
 365                 new_bluetooth_status = 0;
 366         }
 367         else if (sc->bluetooth_enable_if_radio_on &&
 368                 (wireless & HP_MASK_BLUETOOTH_RADIO) &&
 369                 !(wireless & HP_MASK_BLUETOOTH_ENABLED)) {
 370                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 371                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x202);
 372                 new_bluetooth_status = 1;
 373         }
 374         if (sc->wwan_disable_if_radio_off &&
 375             !(wireless & HP_MASK_WWAN_RADIO) &&
 376             (wireless & HP_MASK_WWAN_ENABLED)) {
 377                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 378                 ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x400);
 379                 new_wwan_status = 0;
 380         }
 381         else if (sc->wwan_enable_if_radio_on &&
 382                 (wireless & HP_MASK_WWAN_RADIO) &&
 383                 !(wireless & HP_MASK_WWAN_ENABLED)) {
 384                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 385                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x404);
 386                 new_wwan_status = 1;
 387         }
 388
 389         if (new_wlan_status == -1) {
 390                 new_wlan_status = (wireless & HP_MASK_WLAN_ON_AIR);
 391                 if ((new_wlan_status?1:0) != sc->was_wlan_on_air) {
 392                         sc->was_wlan_on_air = sc->was_wlan_on_air?0:1;
 393                         if (sc->verbose)
 394                                 device_printf(sc->wmi_dev,
 395                                     "WLAN on air changed to %i "
 396                                     "(new_wlan_status is %i)\n",
 397                                     sc->was_wlan_on_air, new_wlan_status);
 398                         acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
 399                             0xc0+sc->was_wlan_on_air);
 400                 }
 401         }
 402         if (new_bluetooth_status == -1) {
 403                 new_bluetooth_status = (wireless & HP_MASK_BLUETOOTH_ON_AIR);
 404                 if ((new_bluetooth_status?1:0) != sc->was_bluetooth_on_air) {
 405                         sc->was_bluetooth_on_air = sc->was_bluetooth_on_air?
 406                             0:1;
 407                         if (sc->verbose)
 408                                 device_printf(sc->wmi_dev,
 409                                     "BLUETOOTH on air changed"
 410                                     " to %i (new_bluetooth_status is %i)\n",
 411                                     sc->was_bluetooth_on_air,
 412                                     new_bluetooth_status);
 413                         acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
 414                             0xd0+sc->was_bluetooth_on_air);
 415                 }
 416         }
 417         if (new_wwan_status == -1) {
 418                 new_wwan_status = (wireless & HP_MASK_WWAN_ON_AIR);
 419                 if ((new_wwan_status?1:0) != sc->was_wwan_on_air) {
 420                         sc->was_wwan_on_air = sc->was_wwan_on_air?0:1;
 421                         if (sc->verbose)
 422                                 device_printf(sc->wmi_dev,
 423                                     "WWAN on air changed to %i"
 424                                     " (new_wwan_status is %i)\n",
 425                                     sc->was_wwan_on_air, new_wwan_status);
 426                         acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
 427                             0xe0+sc->was_wwan_on_air);
 428                 }
 429         }
 430 }
 431
 432 static void
 433 acpi_hp_identify(driver_t *driver, device_t parent)
 434 {
 435
 436         /* Don't do anything if driver is disabled. */
 437         if (acpi_disabled("hp"))
 438                 return;
 439
 440         /* Add only a single device instance. */
 441         if (device_find_child(parent, "acpi_hp", -1) != NULL)
 442                 return;
 443
 444         if (BUS_ADD_CHILD(parent, 0, "acpi_hp", -1) == NULL)
 445                 device_printf(parent, "add acpi_hp child failed\n");
 446 }
 447
 448 static int
 449 acpi_hp_probe(device_t dev)
 450 {
 451
 452         device_set_desc(dev, "HP ACPI-WMI Mapping");
 453         return (0);
 454 }
 455
 456 static int
 457 acpi_hp_attach(device_t dev)
 458 {
 459         struct acpi_hp_softc    *sc;
 460         int                     arg;
 461
 462         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 463
 464         sc = device_get_softc(dev);
 465         sc->dev = dev;
 466         sc->has_notify = 0;
 467         sc->has_cmi = 0;
 468         sc->bluetooth_enable_if_radio_on = 0;
 469         sc->bluetooth_disable_if_radio_off = 0;
 470         sc->wlan_enable_if_radio_on = 0;
 471         sc->wlan_disable_if_radio_off = 0;
 472         sc->wlan_enable_if_radio_on = 0;
 473         sc->wlan_disable_if_radio_off = 0;
 474         sc->was_wlan_on_air = 0;
 475         sc->was_bluetooth_on_air = 0;
 476         sc->was_wwan_on_air = 0;
 477         sc->cmi_detail = 0;
 478         sc->cmi_order_size = -1;
 479         sc->verbose = 0;
 480         memset(sc->cmi_order, 0, sizeof(sc->cmi_order));
 481
 482         sc->wmi_dev = device_get_parent(dev);
 483         if (!ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 484             ACPI_HP_WMI_BIOS_GUID)) {
 485                 device_printf(dev,
 486                     "WMI device does not provide the HP BIOS GUID\n");
 487                 return (EINVAL);
 488         }
 489         if (ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 490             ACPI_HP_WMI_EVENT_GUID)) {
 491                 device_printf(dev,
 492                     "HP event GUID detected, installing event handler\n");
 493                 if (ACPI_WMI_INSTALL_EVENT_HANDLER(sc->wmi_dev,
 494                     ACPI_HP_WMI_EVENT_GUID, acpi_hp_notify, dev)) {
 495                         device_printf(dev,
 496                             "Could not install notification handler!\n");
 497                 }
 498                 else {
 499                         sc->has_notify = 1;
 500                 }
 501         }
 502         if ((sc->has_cmi =
 503             ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev, ACPI_HP_WMI_CMI_GUID)
 504             )) {
 505                 device_printf(dev, "HP CMI GUID detected\n");
 506         }
 507
 508         if (sc->has_cmi) {
 509                 sc->hpcmi_dev_t = make_dev(&hpcmi_cdevsw, 0, UID_ROOT,
 510                             GID_WHEEL, 0644, "hpcmi");
 511                 sc->hpcmi_dev_t->si_drv1 = sc;
 512                 sc->hpcmi_open_pid = 0;
 513                 sc->hpcmi_bufptr = -1;
 514         }
 515
 516         ACPI_SERIAL_BEGIN(hp);
 517
 518         sc->sysctl_ctx = device_get_sysctl_ctx(dev);
 519         sc->sysctl_tree = device_get_sysctl_tree(dev);
 520         for (int i = 0; acpi_hp_sysctls[i].name != NULL; ++i) {
 521                 arg = 0;
 522                 if ((!sc->has_notify &&
 523                     (acpi_hp_sysctls[i].method ==
 524                         ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON ||
 525                     acpi_hp_sysctls[i].method ==
 526                         ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF ||
 527                     acpi_hp_sysctls[i].method ==
 528                         ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON ||
 529                     acpi_hp_sysctls[i].method ==
 530                         ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF ||
 531                     acpi_hp_sysctls[i].method ==
 532                         ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON ||
 533                     acpi_hp_sysctls[i].method ==
 534                         ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF)) ||
 535                     (arg = acpi_hp_sysctl_get(sc,
 536                     acpi_hp_sysctls[i].method)) < 0) {
 537                         continue;
 538                 }
 539                 if (acpi_hp_sysctls[i].method == ACPI_HP_METHOD_WLAN_ON_AIR) {
 540                         sc->was_wlan_on_air = arg;
 541                 }
 542                 else if (acpi_hp_sysctls[i].method ==
 543                             ACPI_HP_METHOD_BLUETOOTH_ON_AIR) {
 544                         sc->was_bluetooth_on_air = arg;
 545                 }
 546                 else if (acpi_hp_sysctls[i].method ==
 547                             ACPI_HP_METHOD_WWAN_ON_AIR) {
 548                         sc->was_wwan_on_air = arg;
 549                 }
 550
 551                 if (acpi_hp_sysctls[i].flag_rdonly != 0) {
 552                         SYSCTL_ADD_PROC(sc->sysctl_ctx,
 553                             SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
 554                             acpi_hp_sysctls[i].name, CTLTYPE_INT | CTLFLAG_RD,
 555                             sc, i, acpi_hp_sysctl, "I",
 556                             acpi_hp_sysctls[i].description);
 557                 } else {
 558                         SYSCTL_ADD_PROC(sc->sysctl_ctx,
 559                             SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
 560                             acpi_hp_sysctls[i].name, CTLTYPE_INT | CTLFLAG_RW,
 561                             sc, i, acpi_hp_sysctl, "I",
 562                             acpi_hp_sysctls[i].description);
 563                 }
 564         }
 565         ACPI_SERIAL_END(hp);
 566
 567         return (0);
 568 }
 569
 570 static int
 571 acpi_hp_detach(device_t dev)
 572 {
 573         struct acpi_hp_softc *sc;
 574
 575         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 576         sc = device_get_softc(dev);
 577         if (sc->has_cmi && sc->hpcmi_open_pid != 0)
 578                 return (EBUSY);
 579
 580         if (sc->has_notify)
 581                 ACPI_WMI_REMOVE_EVENT_HANDLER(dev, ACPI_HP_WMI_EVENT_GUID);
 582
 583         if (sc->has_cmi) {
 584                 if (sc->hpcmi_bufptr != -1) {
 585                         sbuf_delete(&sc->hpcmi_sbuf);
 586                         sc->hpcmi_bufptr = -1;
 587                 }
 588                 sc->hpcmi_open_pid = 0;
 589                 destroy_dev(sc->hpcmi_dev_t);
 590         }
 591
 592         return (0);
 593 }
 594
 595 static int
 596 acpi_hp_sysctl(SYSCTL_HANDLER_ARGS)
 597 {
 598         struct acpi_hp_softc    *sc;
 599         int                     arg;
 600         int                     oldarg;
 601         int                     error = 0;
 602         int                     function;
 603         int                     method;
 604
 605         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 606
 607         sc = (struct acpi_hp_softc *)oidp->oid_arg1;
 608         function = oidp->oid_arg2;
 609         method = acpi_hp_sysctls[function].method;
 610
 611         ACPI_SERIAL_BEGIN(hp);
 612         arg = acpi_hp_sysctl_get(sc, method);
 613         oldarg = arg;
 614         error = sysctl_handle_int(oidp, &arg, 0, req);
 615         if (!error && req->newptr != NULL) {
 616                 error = acpi_hp_sysctl_set(sc, method, arg, oldarg);
 617         }
 618         ACPI_SERIAL_END(hp);
 619
 620         return (error);
 621 }
 622
 623 static int
 624 acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method)
 625 {
 626         int     val = 0;
 627
 628         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 629         ACPI_SERIAL_ASSERT(hp);
 630
 631         switch (method) {
 632         case ACPI_HP_METHOD_WLAN_ENABLED:
 633                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 634                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 635                 val = ((val & HP_MASK_WLAN_ENABLED) != 0);
 636                 break;
 637         case ACPI_HP_METHOD_WLAN_RADIO:
 638                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 639                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 640                 val = ((val & HP_MASK_WLAN_RADIO) != 0);
 641                 break;
 642         case ACPI_HP_METHOD_WLAN_ON_AIR:
 643                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 644                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 645                 val = ((val & HP_MASK_WLAN_ON_AIR) != 0);
 646                 break;
 647         case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 648                 val = sc->wlan_enable_if_radio_on;
 649                 break;
 650         case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 651                 val = sc->wlan_disable_if_radio_off;
 652                 break;
 653         case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 654                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 655                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 656                 val = ((val & HP_MASK_BLUETOOTH_ENABLED) != 0);
 657                 break;
 658         case ACPI_HP_METHOD_BLUETOOTH_RADIO:
 659                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 660                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 661                 val = ((val & HP_MASK_BLUETOOTH_RADIO) != 0);
 662                 break;
 663         case ACPI_HP_METHOD_BLUETOOTH_ON_AIR:
 664                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 665                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 666                 val = ((val & HP_MASK_BLUETOOTH_ON_AIR) != 0);
 667                 break;
 668         case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 669                 val = sc->bluetooth_enable_if_radio_on;
 670                 break;
 671         case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 672                 val = sc->bluetooth_disable_if_radio_off;
 673                 break;
 674         case ACPI_HP_METHOD_WWAN_ENABLED:
 675                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 676                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 677                 val = ((val & HP_MASK_WWAN_ENABLED) != 0);
 678                 break;
 679         case ACPI_HP_METHOD_WWAN_RADIO:
 680                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 681                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 682                 val = ((val & HP_MASK_WWAN_RADIO) != 0);
 683                 break;
 684         case ACPI_HP_METHOD_WWAN_ON_AIR:
 685                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 686                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 687                 val = ((val & HP_MASK_WWAN_ON_AIR) != 0);
 688                 break;
 689         case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 690                 val = sc->wwan_enable_if_radio_on;
 691                 break;
 692         case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 693                 val = sc->wwan_disable_if_radio_off;
 694                 break;
 695         case ACPI_HP_METHOD_ALS:
 696                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 697                         ACPI_HP_WMI_ALS_COMMAND, 0, 0);
 698                 break;
 699         case ACPI_HP_METHOD_DISPLAY:
 700                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 701                         ACPI_HP_WMI_DISPLAY_COMMAND, 0, 0);
 702                 break;
 703         case ACPI_HP_METHOD_HDDTEMP:
 704                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 705                         ACPI_HP_WMI_HDDTEMP_COMMAND, 0, 0);
 706                 break;
 707         case ACPI_HP_METHOD_DOCK:
 708                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 709                         ACPI_HP_WMI_DOCK_COMMAND, 0, 0);
 710                 break;
 711         case ACPI_HP_METHOD_CMI_DETAIL:
 712                 val = sc->cmi_detail;
 713                 break;
 714         case ACPI_HP_METHOD_VERBOSE:
 715                 val = sc->verbose;
 716                 break;
 717         }
 718
 719         return (val);
 720 }
 721
 722 static int
 723 acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method, int arg, int oldarg)
 724 {
 725         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 726         ACPI_SERIAL_ASSERT(hp);
 727
 728         if (method != ACPI_HP_METHOD_CMI_DETAIL &&
 729             method != ACPI_HP_METHOD_VERBOSE)
 730                 arg = arg?1:0;
 731
 732         if (arg != oldarg) {
 733                 switch (method) {
 734                 case ACPI_HP_METHOD_WLAN_ENABLED:
 735                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 736                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 737                                     arg?0x101:0x100));
 738                 case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 739                         sc->wlan_enable_if_radio_on = arg;
 740                         acpi_hp_evaluate_auto_on_off(sc);
 741                         break;
 742                 case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 743                         sc->wlan_disable_if_radio_off = arg;
 744                         acpi_hp_evaluate_auto_on_off(sc);
 745                         break;
 746                 case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 747                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 748                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 749                                     arg?0x202:0x200));
 750                 case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 751                         sc->bluetooth_enable_if_radio_on = arg;
 752                         acpi_hp_evaluate_auto_on_off(sc);
 753                         break;
 754                 case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 755                         sc->bluetooth_disable_if_radio_off = arg?1:0;
 756                         acpi_hp_evaluate_auto_on_off(sc);
 757                         break;
 758                 case ACPI_HP_METHOD_WWAN_ENABLED:
 759                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 760                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 761                                     arg?0x404:0x400));
 762                 case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 763                         sc->wwan_enable_if_radio_on = arg?1:0;
 764                         acpi_hp_evaluate_auto_on_off(sc);
 765                         break;
 766                 case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 767                         sc->wwan_disable_if_radio_off = arg?1:0;
 768                         acpi_hp_evaluate_auto_on_off(sc);
 769                         break;
 770                 case ACPI_HP_METHOD_ALS:
 771                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 772                                     ACPI_HP_WMI_ALS_COMMAND, 1,
 773                                     arg?1:0));
 774                 case ACPI_HP_METHOD_CMI_DETAIL:
 775                         sc->cmi_detail = arg;
 776                         if ((arg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) !=
 777                             (oldarg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE)) {
 778                             sc->cmi_order_size = -1;
 779                         }
 780                         break;
 781                 case ACPI_HP_METHOD_VERBOSE:
 782                         sc->verbose = arg;
 783                         break;
 784                 }
 785         }
 786
 787         return (0);
 788 }
 789
 790 static __inline void
 791 acpi_hp_free_buffer(ACPI_BUFFER* buf) {
 792         if (buf && buf->Pointer) {
 793                 AcpiOsFree(buf->Pointer);
 794         }
 795 }
 796
 797 static void
 798 acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context)
 799 {
 800         device_t dev = context;
 801         ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
 802
 803         struct acpi_hp_softc *sc = device_get_softc(dev);
 804         ACPI_BUFFER response = { ACPI_ALLOCATE_BUFFER, NULL };
 805         ACPI_OBJECT *obj;
 806         ACPI_WMI_GET_EVENT_DATA(sc->wmi_dev, notify, &response);
 807         obj = (ACPI_OBJECT*) response.Pointer;
 808         if (obj && obj->Type == ACPI_TYPE_BUFFER && obj->Buffer.Length == 8) {
 809                 if (*((UINT8 *) obj->Buffer.Pointer) == 0x5) {
 810                         acpi_hp_evaluate_auto_on_off(sc);
 811                 }
 812         }
 813         acpi_hp_free_buffer(&response);
 814 }
 815
 816 static int
 817 acpi_hp_exec_wmi_command(device_t wmi_dev, int command, int is_write, int val)
 818 {
 819         UINT32          params[5] = { 0x55434553,
 820                             is_write?2:1,
 821                             command,
 822                             is_write?4:0,
 823                             val};
 824         UINT32*         result;
 825         ACPI_OBJECT     *obj;
 826         ACPI_BUFFER     in = { sizeof(params), &params };
 827         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 828         int retval;
 829
 830         if (ACPI_FAILURE(ACPI_WMI_EVALUATE_CALL(wmi_dev, ACPI_HP_WMI_BIOS_GUID,
 831                     0, 0x3, &in, &out))) {
 832                 acpi_hp_free_buffer(&out);
 833                 return (-EINVAL);
 834         }
 835         obj = out.Pointer;
 836         if (!obj || obj->Type != ACPI_TYPE_BUFFER) {
 837                 acpi_hp_free_buffer(&out);
 838                 return (-EINVAL);
 839         }
 840         result = (UINT32*) obj->Buffer.Pointer;
 841         retval = result[2];
 842         if (result[1] > 0) {
 843                 retval = result[1];
 844         }
 845         acpi_hp_free_buffer(&out);
 846
 847         return (retval);
 848 }
 849
 850 static __inline char*
 851 acpi_hp_get_string_from_object(ACPI_OBJECT* obj, char* dst, size_t size) {
 852         int     length;
 853
 854         dst[0] = 0;
 855         if (obj->Type == ACPI_TYPE_STRING) {
 856                 length = obj->String.Length+1;
 857                 if (length > size) {
 858                         length = size - 1;
 859                 }
 860                 strlcpy(dst, obj->String.Pointer, length);
 861                 acpi_hp_hex_decode(dst);
 862         }
 863
 864         return (dst);
 865 }
 866
 867
 868 /*
 869  * Read BIOS Setting block in instance "instance".
 870  * The block returned is ACPI_TYPE_PACKAGE which should contain the following
 871  * elements:
 872  * Index Meaning
 873  * 0        Setting Name [string]
 874  * 1        Value (comma separated, asterisk marks the current value) [string]
 875  * 2        Path within the bios hierarchy [string]
 876  * 3        IsReadOnly [int]
 877  * 4        DisplayInUI [int]
 878  * 5        RequiresPhysicalPresence [int]
 879  * 6        Sequence for ordering within the bios settings (absolute) [int]
 880  * 7        Length of prerequisites array [int]
 881  * 8..8+[7] PrerequisiteN [string]
 882  * 9+[7]    Current value (in case of enum) [string] / Array length [int]
 883  * 10+[7]   Enum length [int] / Array values
 884  * 11+[7]ff Enum value at index x [string]
 885  */
 886 static int
 887 acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid, UINT8 instance,
 888     char* outbuf, size_t outsize, UINT32* sequence, int detail)
 889 {
 890         ACPI_OBJECT     *obj;
 891         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 892         int             i;
 893         int             outlen;
 894         int             size = 255;
 895         int             has_enums = 0;
 896         int             valuebase = 0;
 897         char            string_buffer[size];
 898         int             enumbase;
 899
 900         outlen = 0;
 901         outbuf[0] = 0;
 902         if (ACPI_FAILURE(ACPI_WMI_GET_BLOCK(wmi_dev, guid, instance, &out))) {
 903                 acpi_hp_free_buffer(&out);
 904                 return (-EINVAL);
 905         }
 906         obj = out.Pointer;
 907         if (!obj || obj->Type != ACPI_TYPE_PACKAGE) {
 908                 acpi_hp_free_buffer(&out);
 909                 return (-EINVAL);
 910         }
 911
 912         if (obj->Package.Count >= 8 &&
 913             obj->Package.Elements[7].Type == ACPI_TYPE_INTEGER) {
 914             valuebase = 8 + obj->Package.Elements[7].Integer.Value;
 915         }
 916
 917         /* check if this matches our expectations based on limited knowledge */
 918         if (valuebase > 7 && obj->Package.Count > valuebase + 1 &&
 919             obj->Package.Elements[0].Type == ACPI_TYPE_STRING &&
 920             obj->Package.Elements[1].Type == ACPI_TYPE_STRING &&
 921             obj->Package.Elements[2].Type == ACPI_TYPE_STRING &&
 922             obj->Package.Elements[3].Type == ACPI_TYPE_INTEGER &&
 923             obj->Package.Elements[4].Type == ACPI_TYPE_INTEGER &&
 924             obj->Package.Elements[5].Type == ACPI_TYPE_INTEGER &&
 925             obj->Package.Elements[6].Type == ACPI_TYPE_INTEGER &&
 926             obj->Package.Elements[valuebase].Type == ACPI_TYPE_STRING &&
 927             obj->Package.Elements[valuebase+1].Type == ACPI_TYPE_INTEGER &&
 928             obj->Package.Count > valuebase +
 929                 obj->Package.Elements[valuebase+1].Integer.Value
 930            ) {
 931                 enumbase = valuebase + 1;
 932                 if (detail & ACPI_HP_CMI_DETAIL_PATHS) {
 933                         strlcat(outbuf, acpi_hp_get_string_from_object(
 934                                 &obj->Package.Elements[2], string_buffer, size),
 935                                 outsize);
 936                         outlen += 48;
 937                         while (strlen(outbuf) < outlen)
 938                                 strlcat(outbuf, " ", outsize);
 939                 }
 940                 strlcat(outbuf, acpi_hp_get_string_from_object(
 941                                 &obj->Package.Elements[0], string_buffer, size),
 942                                 outsize);
 943                 outlen += 43;
 944                 while (strlen(outbuf) < outlen)
 945                         strlcat(outbuf, " ", outsize);
 946                 strlcat(outbuf, acpi_hp_get_string_from_object(
 947                                 &obj->Package.Elements[valuebase], string_buffer,
 948                                 size),
 949                                 outsize);
 950                 outlen += 21;
 951                 while (strlen(outbuf) < outlen)
 952                         strlcat(outbuf, " ", outsize);
 953                 for (i = 0; i < strlen(outbuf); ++i)
 954                         if (outbuf[i] == '\\')
 955                                 outbuf[i] = '/';
 956                 if (detail & ACPI_HP_CMI_DETAIL_ENUMS) {
 957                         for (i = enumbase + 1; i < enumbase + 1 +
 958                             obj->Package.Elements[enumbase].Integer.Value;
 959                             ++i) {
 960                                 acpi_hp_get_string_from_object(
 961                                     &obj->Package.Elements[i], string_buffer,
 962                                     size);
 963                                 if (strlen(string_buffer) > 1 ||
 964                                     (strlen(string_buffer) == 1 &&
 965                                     string_buffer[0] != ' ')) {
 966                                         if (has_enums)
 967                                                 strlcat(outbuf, "/", outsize);
 968                                         else
 969                                                 strlcat(outbuf, " (", outsize);
 970                                         strlcat(outbuf, string_buffer, outsize);
 971                                         has_enums = 1;
 972                                 }
 973                         }
 974                 }
 975                 if (has_enums)
 976                         strlcat(outbuf, ")", outsize);
 977                 if (detail & ACPI_HP_CMI_DETAIL_FLAGS) {
 978                         strlcat(outbuf, obj->Package.Elements[3].Integer.Value?
 979                             " [ReadOnly]":"", outsize);
 980                         strlcat(outbuf, obj->Package.Elements[4].Integer.Value?
 981                             "":" [NOUI]", outsize);
 982                         strlcat(outbuf, obj->Package.Elements[5].Integer.Value?
 983                             " [RPP]":"", outsize);
 984                 }
 985                 *sequence = (UINT32) obj->Package.Elements[6].Integer.Value;
 986         }
 987         acpi_hp_free_buffer(&out);
 988
 989         return (0);
 990 }
 991
 992
 993
 994 /*
 995  * Convert given two digit hex string (hexin) to an UINT8 referenced
 996  * by byteout.
 997  * Return != 0 if the was a problem (invalid input)
 998  */
 999 static __inline int acpi_hp_hex_to_int(const UINT8 *hexin, UINT8 *byteout)
1000 {
1001         unsigned int    hi;
1002         unsigned int    lo;
1003
1004         hi = hexin[0];
1005         lo = hexin[1];
1006         if ('0' <= hi && hi <= '9')
1007                 hi -= '0';
1008         else if ('A' <= hi && hi <= 'F')
1009                 hi -= ('A' - 10);
1010         else if ('a' <= hi && hi <= 'f')
1011                 hi -= ('a' - 10);
1012         else
1013                 return (1);
1014         if ('0' <= lo && lo <= '9')
1015                 lo -= '0';
1016         else if ('A' <= lo && lo <= 'F')
1017                 lo -= ('A' - 10);
1018         else if ('a' <= lo && lo <= 'f')
1019                 lo -= ('a' - 10);
1020         else
1021                 return (1);
1022         *byteout = (hi << 4) + lo;
1023
1024         return (0);
1025 }
1026
1027
1028 static void
1029 acpi_hp_hex_decode(char* buffer)
1030 {
1031         int     i;
1032         int     length = strlen(buffer);
1033         UINT8   *uin;
1034         UINT8   uout;
1035
1036         if (((int)length/2)*2 == length || length < 10) return;
1037
1038         for (i = 0; i<length; ++i) {
1039                 if (!((i+1)%3)) {
1040                         if (buffer[i] != ' ')
1041                                 return;
1042                 }
1043                 else
1044                         if (!((buffer[i] >= '0' && buffer[i] <= '9') ||
1045                             (buffer[i] >= 'A' && buffer[i] <= 'F')))
1046                                 return;
1047         }
1048
1049         for (i = 0; i<length; i += 3) {
1050                 uin = &buffer[i];
1051                 uout = 0;
1052                 acpi_hp_hex_to_int(uin, &uout);
1053                 buffer[i/3] = (char) uout;
1054         }
1055         buffer[(length+1)/3] = 0;
1056 }
1057
1058
1059 /*
1060  * open hpcmi device
1061  */
1062 static int
1063 acpi_hp_hpcmi_open(struct cdev* dev, int flags, int mode, struct thread *td)
1064 {
1065         struct acpi_hp_softc    *sc;
1066         int                     ret;
1067
1068         if (dev == NULL || dev->si_drv1 == NULL)
1069                 return (EBADF);
1070         sc = dev->si_drv1;
1071
1072         ACPI_SERIAL_BEGIN(hp);
1073         if (sc->hpcmi_open_pid != 0) {
1074                 ret = EBUSY;
1075         }
1076         else {
1077                 if (sbuf_new(&sc->hpcmi_sbuf, NULL, 4096, SBUF_AUTOEXTEND)
1078                     == NULL) {
1079                         ret = ENXIO;
1080                 } else {
1081                         sc->hpcmi_open_pid = td->td_proc->p_pid;
1082                         sc->hpcmi_bufptr = 0;
1083                         ret = 0;
1084                 }
1085         }
1086         ACPI_SERIAL_END(hp);
1087
1088         return (ret);
1089 }
1090
1091 /*
1092  * close hpcmi device
1093  */
1094 static int
1095 acpi_hp_hpcmi_close(struct cdev* dev, int flags, int mode, struct thread *td)
1096 {
1097         struct acpi_hp_softc    *sc;
1098         int                     ret;
1099
1100         if (dev == NULL || dev->si_drv1 == NULL)
1101                 return (EBADF);
1102         sc = dev->si_drv1;
1103
1104         ACPI_SERIAL_BEGIN(hp);
1105         if (sc->hpcmi_open_pid == 0) {
1106                 ret = EBADF;
1107         }
1108         else {
1109                 if (sc->hpcmi_bufptr != -1) {
1110                         sbuf_delete(&sc->hpcmi_sbuf);
1111                         sc->hpcmi_bufptr = -1;
1112                 }
1113                 sc->hpcmi_open_pid = 0;
1114                 ret = 0;
1115         }
1116         ACPI_SERIAL_END(hp);
1117
1118         return (ret);
1119 }
1120
1121 /*
1122  * Read from hpcmi bios information
1123  */
1124 static int
1125 acpi_hp_hpcmi_read(struct cdev *dev, struct uio *buf, int flag)
1126 {
1127         struct acpi_hp_softc    *sc;
1128         int                     pos, i, l, ret;
1129         UINT8                   instance;
1130         UINT8                   maxInstance;
1131         UINT32                  sequence;
1132         int                     linesize = 1025;
1133         char                    line[linesize];
1134
1135         if (dev == NULL || dev->si_drv1 == NULL)
1136                 return (EBADF);
1137         sc = dev->si_drv1;
1138
1139         ACPI_SERIAL_BEGIN(hp);
1140         if (sc->hpcmi_open_pid != buf->uio_td->td_proc->p_pid
1141             || sc->hpcmi_bufptr == -1) {
1142                 ret = EBADF;
1143         }
1144         else {
1145                 if (!sbuf_done(&sc->hpcmi_sbuf)) {
1146                         if (sc->cmi_order_size < 0) {
1147                                 maxInstance = sc->has_cmi;
1148                                 if (!(sc->cmi_detail &
1149                                     ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) &&
1150                                     maxInstance > 0) {
1151                                         maxInstance--;
1152                                 }
1153                                 sc->cmi_order_size = 0;
1154                                 for (instance = 0; instance < maxInstance;
1155                                     ++instance) {
1156                                         if (acpi_hp_get_cmi_block(sc->wmi_dev,
1157                                                 ACPI_HP_WMI_CMI_GUID, instance,
1158                                                 line, linesize, &sequence,
1159                                                 sc->cmi_detail)) {
1160                                                 instance = maxInstance;
1161                                         }
1162                                         else {
1163                                                 pos = sc->cmi_order_size;
1164                                                 for (i=0;
1165                                                   i<sc->cmi_order_size && i<127;
1166                                                      ++i) {
1167                                 if (sc->cmi_order[i].sequence > sequence) {
1168                                                                 pos = i;
1169                                                                 break;
1170                                                         }
1171                                                 }
1172                                                 for (i=sc->cmi_order_size;
1173                                                     i>pos;
1174                                                     --i) {
1175                                                 sc->cmi_order[i].sequence =
1176                                                     sc->cmi_order[i-1].sequence;
1177                                                 sc->cmi_order[i].instance =
1178                                                     sc->cmi_order[i-1].instance;
1179                                                 }
1180                                                 sc->cmi_order[pos].sequence =
1181                                                     sequence;
1182                                                 sc->cmi_order[pos].instance =
1183                                                     instance;
1184                                                 sc->cmi_order_size++;
1185                                         }
1186                                 }
1187                         }
1188                         for (i=0; i<sc->cmi_order_size; ++i) {
1189                                 if (!acpi_hp_get_cmi_block(sc->wmi_dev,
1190                                     ACPI_HP_WMI_CMI_GUID,
1191                                     sc->cmi_order[i].instance, line, linesize,
1192                                     &sequence, sc->cmi_detail)) {
1193                                         sbuf_printf(&sc->hpcmi_sbuf, "%s\n", line);
1194                                 }
1195                         }
1196                         sbuf_finish(&sc->hpcmi_sbuf);
1197                 }
1198                 if (sbuf_len(&sc->hpcmi_sbuf) <= 0) {
1199                         sbuf_delete(&sc->hpcmi_sbuf);
1200                         sc->hpcmi_bufptr = -1;
1201                         sc->hpcmi_open_pid = 0;
1202                         ret = ENOMEM;
1203                 } else {
1204                         l = min(buf->uio_resid, sbuf_len(&sc->hpcmi_sbuf) -
1205                             sc->hpcmi_bufptr);
1206                         ret = (l > 0)?uiomove(sbuf_data(&sc->hpcmi_sbuf) +
1207                             sc->hpcmi_bufptr, l, buf) : 0;
1208                         sc->hpcmi_bufptr += l;
1209                 }
1210         }
1211         ACPI_SERIAL_END(hp);
1212
1213         return (ret);
1214 }