sys/dev/acpica5/acpi_hp/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  * $FreeBSD: src/sys/dev/acpi_support/acpi_hp.c,v 1.3 2009/07/03 21:12:37 rpaulo
  26  */
  27
  28 #include <sys/cdefs.h>
  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 #include <sys/device.h>
  57
  58 #include "acpi.h"
  59 #include "accommon.h"
  60 #include <dev/acpica5/acpivar.h>
  61 #include "acpi_wmi_if.h"
  62
  63 #define _COMPONENT      ACPI_OEM
  64 ACPI_MODULE_NAME("HP")
  65
  66 #define ACPI_HP_WMI_EVENT_GUID          "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  67 #define ACPI_HP_WMI_BIOS_GUID           "5FB7F034-2C63-45E9-BE91-3D44E2C707E4"
  68 #define ACPI_HP_WMI_CMI_GUID            "2D114B49-2DFB-4130-B8FE-4A3C09E75133"
  69
  70 #define ACPI_HP_WMI_DISPLAY_COMMAND     0x1
  71 #define ACPI_HP_WMI_HDDTEMP_COMMAND     0x2
  72 #define ACPI_HP_WMI_ALS_COMMAND         0x3
  73 #define ACPI_HP_WMI_DOCK_COMMAND        0x4
  74 #define ACPI_HP_WMI_WIRELESS_COMMAND    0x5
  75
  76 #define ACPI_HP_METHOD_WLAN_ENABLED                     1
  77 #define ACPI_HP_METHOD_WLAN_RADIO                       2
  78 #define ACPI_HP_METHOD_WLAN_ON_AIR                      3
  79 #define ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON          4
  80 #define ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF        5
  81 #define ACPI_HP_METHOD_BLUETOOTH_ENABLED                6
  82 #define ACPI_HP_METHOD_BLUETOOTH_RADIO                  7
  83 #define ACPI_HP_METHOD_BLUETOOTH_ON_AIR                 8
  84 #define ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON     9
  85 #define ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF   10
  86 #define ACPI_HP_METHOD_WWAN_ENABLED                     11
  87 #define ACPI_HP_METHOD_WWAN_RADIO                       12
  88 #define ACPI_HP_METHOD_WWAN_ON_AIR                      13
  89 #define ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON          14
  90 #define ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF        15
  91 #define ACPI_HP_METHOD_ALS                              16
  92 #define ACPI_HP_METHOD_DISPLAY                          17
  93 #define ACPI_HP_METHOD_HDDTEMP                          18
  94 #define ACPI_HP_METHOD_DOCK                             19
  95 #define ACPI_HP_METHOD_CMI_DETAIL                       20
  96 #define ACPI_HP_METHOD_VERBOSE                          21
  97
  98 #define HP_MASK_WWAN_ON_AIR                     0x1000000
  99 #define HP_MASK_BLUETOOTH_ON_AIR                0x10000
 100 #define HP_MASK_WLAN_ON_AIR                     0x100
 101 #define HP_MASK_WWAN_RADIO                      0x8000000
 102 #define HP_MASK_BLUETOOTH_RADIO                 0x80000
 103 #define HP_MASK_WLAN_RADIO                      0x800
 104 #define HP_MASK_WWAN_ENABLED                    0x2000000
 105 #define HP_MASK_BLUETOOTH_ENABLED               0x20000
 106 #define HP_MASK_WLAN_ENABLED                    0x200
 107
 108 #define ACPI_HP_CMI_DETAIL_PATHS                0x01
 109 #define ACPI_HP_CMI_DETAIL_ENUMS                0x02
 110 #define ACPI_HP_CMI_DETAIL_FLAGS                0x04
 111 #define ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE    0x08
 112
 113 #define sbuf_done(s)            ((s)->s_flags & SBUF_FINISHED)
 114
 115 struct acpi_hp_inst_seq_pair {
 116         UINT32  sequence;       /* sequence number as suggested by cmi bios */
 117         UINT8   instance;       /* object instance on guid */
 118 };
 119
 120 struct acpi_hp_softc {
 121         device_t        dev;
 122         ACPI_HANDLE     handle;
 123         device_t        wmi_dev;
 124         int             has_notify;             /* notification GUID found */
 125         int             has_cmi;                /* CMI GUID found */
 126         int             cmi_detail;             /* CMI detail level
 127                                                    (set by sysctl) */
 128         int             verbose;                /* add debug output */
 129         int             wlan_enable_if_radio_on;        /* set by sysctl */
 130         int             wlan_disable_if_radio_off;      /* set by sysctl */
 131         int             bluetooth_enable_if_radio_on;   /* set by sysctl */
 132         int             bluetooth_disable_if_radio_off; /* set by sysctl */
 133         int             wwan_enable_if_radio_on;        /* set by sysctl */
 134         int             wwan_disable_if_radio_off;      /* set by sysctl */
 135         int             was_wlan_on_air;                /* last known WLAN
 136                                                            on air status */
 137         int             was_bluetooth_on_air;           /* last known BT
 138                                                            on air status */
 139         int             was_wwan_on_air;                /* last known WWAN
 140                                                            on air status */
 141         struct sysctl_ctx_list  sysctl_ctx;
 142         struct sysctl_oid       *sysctl_tree;
 143         struct cdev     *hpcmi_dev_t;           /* hpcmi device handle */
 144         struct sbuf     hpcmi_sbuf;             /* /dev/hpcmi output sbuf */
 145         pid_t           hpcmi_open_pid;         /* pid operating on
 146                                                    /dev/hpcmi */
 147         int             hpcmi_bufptr;           /* current pointer position
 148                                                    in /dev/hpcmi output buffer
 149                                                  */
 150         int             cmi_order_size;         /* size of cmi_order list */
 151         struct acpi_hp_inst_seq_pair cmi_order[128];    /* list of CMI
 152                              instances ordered by BIOS suggested sequence */
 153 };
 154
 155 static struct {
 156         char    *name;
 157         int     method;
 158         char    *description;
 159         int     access;
 160 } acpi_hp_sysctls[] = {
 161         {
 162                 .name           = "wlan_enabled",
 163                 .method         = ACPI_HP_METHOD_WLAN_ENABLED,
 164                 .description    = "Enable/Disable WLAN (WiFi)",
 165                 .access         = CTLTYPE_INT | CTLFLAG_RW
 166         },
 167         {
 168                 .name           = "wlan_radio",
 169                 .method         = ACPI_HP_METHOD_WLAN_RADIO,
 170                 .description    = "WLAN radio status",
 171                 .access         = CTLTYPE_INT | CTLFLAG_RD
 172         },
 173         {
 174                 .name           = "wlan_on_air",
 175                 .method         = ACPI_HP_METHOD_WLAN_ON_AIR,
 176                 .description    = "WLAN radio ready to use (enabled and radio)",
 177                 .access         = CTLTYPE_INT | CTLFLAG_RD
 178         },
 179         {
 180                 .name           = "wlan_enable_if_radio_on",
 181                 .method         = ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON,
 182                 .description    = "Enable WLAN if radio is turned on",
 183                 .access         = CTLTYPE_INT | CTLFLAG_RW
 184         },
 185         {
 186                 .name           = "wlan_disable_if_radio_off",
 187                 .method         = ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF,
 188                 .description    = "Disable WLAN if radio is turned off",
 189                 .access         = CTLTYPE_INT | CTLFLAG_RW
 190         },
 191         {
 192                 .name           = "bt_enabled",
 193                 .method         = ACPI_HP_METHOD_BLUETOOTH_ENABLED,
 194                 .description    = "Enable/Disable Bluetooth",
 195                 .access         = CTLTYPE_INT | CTLFLAG_RW
 196         },
 197         {
 198                 .name           = "bt_radio",
 199                 .method         = ACPI_HP_METHOD_BLUETOOTH_RADIO,
 200                 .description    = "Bluetooth radio status",
 201                 .access         = CTLTYPE_INT | CTLFLAG_RD
 202         },
 203         {
 204                 .name           = "bt_on_air",
 205                 .method         = ACPI_HP_METHOD_BLUETOOTH_ON_AIR,
 206                 .description    = "Bluetooth radio ready to use"
 207                                     " (enabled and radio)",
 208                 .access         = CTLTYPE_INT | CTLFLAG_RD
 209         },
 210         {
 211                 .name           = "bt_enable_if_radio_on",
 212                 .method         = ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON,
 213                 .description    = "Enable bluetooth if radio is turned on",
 214                 .access         = CTLTYPE_INT | CTLFLAG_RW
 215         },
 216         {
 217                 .name           = "bt_disable_if_radio_off",
 218                 .method         = ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF,
 219                 .description    = "Disable bluetooth if radio is turned off",
 220                 .access         = CTLTYPE_INT | CTLFLAG_RW
 221         },
 222         {
 223                 .name           = "wwan_enabled",
 224                 .method         = ACPI_HP_METHOD_WWAN_ENABLED,
 225                 .description    = "Enable/Disable WWAN (UMTS)",
 226                 .access         = CTLTYPE_INT | CTLFLAG_RW
 227         },
 228         {
 229                 .name           = "wwan_radio",
 230                 .method         = ACPI_HP_METHOD_WWAN_RADIO,
 231                 .description    = "WWAN radio status",
 232                 .access         = CTLTYPE_INT | CTLFLAG_RD
 233         },
 234         {
 235                 .name           = "wwan_on_air",
 236                 .method         = ACPI_HP_METHOD_WWAN_ON_AIR,
 237                 .description    = "WWAN radio ready to use (enabled and radio)",
 238                 .access         = CTLTYPE_INT | CTLFLAG_RD
 239         },
 240         {
 241                 .name           = "wwan_enable_if_radio_on",
 242                 .method         = ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON,
 243                 .description    = "Enable WWAN if radio is turned on",
 244                 .access         = CTLTYPE_INT | CTLFLAG_RW
 245         },
 246         {
 247                 .name           = "wwan_disable_if_radio_off",
 248                 .method         = ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF,
 249                 .description    = "Disable WWAN if radio is turned off",
 250                 .access         = CTLTYPE_INT | CTLFLAG_RW
 251         },
 252         {
 253                 .name           = "als_enabled",
 254                 .method         = ACPI_HP_METHOD_ALS,
 255                 .description    = "Enable/Disable ALS (Ambient light sensor)",
 256                 .access         = CTLTYPE_INT | CTLFLAG_RW
 257         },
 258         {
 259                 .name           = "display",
 260                 .method         = ACPI_HP_METHOD_DISPLAY,
 261                 .description    = "Display status",
 262                 .access         = CTLTYPE_INT | CTLFLAG_RD
 263         },
 264         {
 265                 .name           = "hdd_temperature",
 266                 .method         = ACPI_HP_METHOD_HDDTEMP,
 267                 .description    = "HDD temperature",
 268                 .access         = CTLTYPE_INT | CTLFLAG_RD
 269         },
 270         {
 271                 .name           = "is_docked",
 272                 .method         = ACPI_HP_METHOD_DOCK,
 273                 .description    = "Docking station status",
 274                 .access         = CTLTYPE_INT | CTLFLAG_RD
 275         },
 276         {
 277                 .name           = "cmi_detail",
 278                 .method         = ACPI_HP_METHOD_CMI_DETAIL,
 279                 .description    = "Details shown in CMI output "
 280                                     "(cat /dev/hpcmi)",
 281                 .access         = CTLTYPE_INT | CTLFLAG_RW
 282         },
 283         {
 284                 .name           = "verbose",
 285                 .method         = ACPI_HP_METHOD_VERBOSE,
 286                 .description    = "Verbosity level",
 287                 .access         = CTLTYPE_INT | CTLFLAG_RW
 288         },
 289
 290         { NULL, 0, NULL, 0 }
 291 };
 292
 293 ACPI_SERIAL_DECL(hp, "HP ACPI-WMI Mapping");
 294
 295 static int      acpi_hp_probe(device_t dev);
 296 static int      acpi_hp_attach(device_t dev);
 297 static int      acpi_hp_detach(device_t dev);
 298
 299 static void     acpi_hp_evaluate_auto_on_off(struct acpi_hp_softc* sc);
 300 static int      acpi_hp_sysctl(SYSCTL_HANDLER_ARGS);
 301 static int      acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method,
 302                     int arg, int oldarg);
 303 static int      acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method);
 304 static int      acpi_hp_exec_wmi_command(device_t wmi_dev, int command,
 305                     int is_write, int val);
 306 static void     acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context);
 307 static int      acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid,
 308                     UINT8 instance, char* outbuf, size_t outsize,
 309                     UINT32* sequence, int detail);
 310 static void     acpi_hp_hex_decode(char* buffer);
 311
 312 #if defined (__FreeBSD__)
 313 static d_open_t acpi_hp_hpcmi_open;
 314 static d_close_t acpi_hp_hpcmi_close;
 315 static d_read_t acpi_hp_hpcmi_read;
 316 #else
 317 static int acpi_hp_hpcmi_open(struct dev_open_args *ap);
 318 static int acpi_hp_hpcmi_close(struct dev_close_args *ap);
 319 static int acpi_hp_hpcmi_read(struct dev_read_args *ap);
 320 #endif
 321
 322 /* handler /dev/hpcmi device */
 323 struct dev_ops hpcmi_ops = {
 324         { .name = "hpcmi" },
 325         .d_open = acpi_hp_hpcmi_open,
 326         .d_close = acpi_hp_hpcmi_close,
 327         .d_read = acpi_hp_hpcmi_read,
 328 };
 329
 330 static device_method_t acpi_hp_methods[] = {
 331         DEVMETHOD(device_probe, acpi_hp_probe),
 332         DEVMETHOD(device_attach, acpi_hp_attach),
 333         DEVMETHOD(device_detach, acpi_hp_detach),
 334         {0, 0}
 335 };
 336
 337 static driver_t acpi_hp_driver = {
 338         "acpi_hp",
 339         acpi_hp_methods,
 340         sizeof(struct acpi_hp_softc),
 341 };
 342
 343 static devclass_t acpi_hp_devclass;
 344
 345 DRIVER_MODULE(acpi_hp, acpi, acpi_hp_driver, acpi_hp_devclass,
 346                 0, 0);
 347 MODULE_DEPEND(acpi_hp, acpi_wmi, 1, 1, 1);
 348 MODULE_DEPEND(acpi_hp, acpi, 1, 1, 1);
 349
 350 static void
 351 acpi_hp_evaluate_auto_on_off(struct acpi_hp_softc *sc)
 352 {
 353         int     wireless;
 354         int     new_wlan_status;
 355         int     new_bluetooth_status;
 356         int     new_wwan_status;
 357
 358         wireless = acpi_hp_exec_wmi_command(sc->wmi_dev,
 359                     ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 360         new_wlan_status = -1;
 361         new_bluetooth_status = -1;
 362         new_wwan_status = -1;
 363
 364         if (sc->verbose)
 365                 device_printf(sc->wmi_dev, "Wireless status is %x\n", wireless);
 366         if (sc->wlan_disable_if_radio_off && !(wireless & HP_MASK_WLAN_RADIO)
 367             &&  (wireless & HP_MASK_WLAN_ENABLED)) {
 368                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 369                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x100);
 370                 new_wlan_status = 0;
 371         }
 372         else if (sc->wlan_enable_if_radio_on && (wireless & HP_MASK_WLAN_RADIO)
 373                 &&  !(wireless & HP_MASK_WLAN_ENABLED)) {
 374                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 375                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x101);
 376                 new_wlan_status = 1;
 377         }
 378         if (sc->bluetooth_disable_if_radio_off &&
 379             !(wireless & HP_MASK_BLUETOOTH_RADIO) &&
 380             (wireless & HP_MASK_BLUETOOTH_ENABLED)) {
 381                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 382                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x200);
 383                 new_bluetooth_status = 0;
 384         }
 385         else if (sc->bluetooth_enable_if_radio_on &&
 386                 (wireless & HP_MASK_BLUETOOTH_RADIO) &&
 387                 !(wireless & HP_MASK_BLUETOOTH_ENABLED)) {
 388                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 389                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x202);
 390                 new_bluetooth_status = 1;
 391         }
 392         if (sc->wwan_disable_if_radio_off &&
 393             !(wireless & HP_MASK_WWAN_RADIO) &&
 394             (wireless & HP_MASK_WWAN_ENABLED)) {
 395                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 396                 ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x400);
 397                 new_wwan_status = 0;
 398         }
 399         else if (sc->wwan_enable_if_radio_on &&
 400                 (wireless & HP_MASK_WWAN_RADIO) &&
 401                 !(wireless & HP_MASK_WWAN_ENABLED)) {
 402                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 403                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x404);
 404                 new_wwan_status = 1;
 405         }
 406
 407         if (new_wlan_status == -1) {
 408                 new_wlan_status = (wireless & HP_MASK_WLAN_ON_AIR);
 409                 if ((new_wlan_status?1:0) != sc->was_wlan_on_air) {
 410                         sc->was_wlan_on_air = sc->was_wlan_on_air?0:1;
 411                         if (sc->verbose)
 412                                 device_printf(sc->wmi_dev,
 413                                     "WLAN on air changed to %i "
 414                                     "(new_wlan_status is %i)\n",
 415                                     sc->was_wlan_on_air, new_wlan_status);
 416                         acpi_UserNotify("HP", sc->handle,
 417                             0xc0+sc->was_wlan_on_air);
 418                 }
 419         }
 420         if (new_bluetooth_status == -1) {
 421                 new_bluetooth_status = (wireless & HP_MASK_BLUETOOTH_ON_AIR);
 422                 if ((new_bluetooth_status?1:0) != sc->was_bluetooth_on_air) {
 423                         sc->was_bluetooth_on_air = sc->was_bluetooth_on_air?
 424                             0:1;
 425                         if (sc->verbose)
 426                                 device_printf(sc->wmi_dev,
 427                                     "BLUETOOTH on air changed"
 428                                     " to %i (new_bluetooth_status is %i)\n",
 429                                     sc->was_bluetooth_on_air,
 430                                     new_bluetooth_status);
 431                         acpi_UserNotify("HP", sc->handle,
 432                             0xd0+sc->was_bluetooth_on_air);
 433                 }
 434         }
 435         if (new_wwan_status == -1) {
 436                 new_wwan_status = (wireless & HP_MASK_WWAN_ON_AIR);
 437                 if ((new_wwan_status?1:0) != sc->was_wwan_on_air) {
 438                         sc->was_wwan_on_air = sc->was_wwan_on_air?0:1;
 439                         if (sc->verbose)
 440                                 device_printf(sc->wmi_dev,
 441                                     "WWAN on air changed to %i"
 442                                     " (new_wwan_status is %i)\n",
 443                                     sc->was_wwan_on_air, new_wwan_status);
 444                         acpi_UserNotify("HP", sc->handle,
 445                             0xe0+sc->was_wwan_on_air);
 446                 }
 447         }
 448 }
 449
 450 static int
 451 acpi_hp_probe(device_t dev)
 452 {
 453         if (acpi_disabled("hp") || device_get_unit(dev) != 0)
 454                 return (ENXIO);
 455         device_set_desc(dev, "HP ACPI-WMI Mapping");
 456
 457         return (0);
 458 }
 459
 460 static int
 461 acpi_hp_attach(device_t dev)
 462 {
 463         struct acpi_hp_softc    *sc;
 464         struct acpi_softc       *acpi_sc;
 465         devclass_t              wmi_devclass;
 466         int                     arg;
 467
 468         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 469
 470         sc = device_get_softc(dev);
 471         sc->dev = dev;
 472         sc->handle = acpi_get_handle(dev);
 473         sc->has_notify = 0;
 474         sc->has_cmi = 0;
 475         sc->bluetooth_enable_if_radio_on = 0;
 476         sc->bluetooth_disable_if_radio_off = 0;
 477         sc->wlan_enable_if_radio_on = 0;
 478         sc->wlan_disable_if_radio_off = 0;
 479         sc->wlan_enable_if_radio_on = 0;
 480         sc->wlan_disable_if_radio_off = 0;
 481         sc->was_wlan_on_air = 0;
 482         sc->was_bluetooth_on_air = 0;
 483         sc->was_wwan_on_air = 0;
 484         sc->cmi_detail = 0;
 485         sc->cmi_order_size = -1;
 486         sc->verbose = 0;
 487         memset(sc->cmi_order, 0, sizeof(sc->cmi_order));
 488         acpi_sc = acpi_device_get_parent_softc(dev);
 489
 490         if (!(wmi_devclass = devclass_find ("acpi_wmi"))) {
 491                 device_printf(dev, "Couldn't find acpi_wmi devclass\n");
 492                 return (EINVAL);
 493         }
 494         if (!(sc->wmi_dev = devclass_get_device(wmi_devclass, 0))) {
 495                 device_printf(dev, "Couldn't find acpi_wmi device\n");
 496                 return (EINVAL);
 497         }
 498         if (!ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 499             ACPI_HP_WMI_BIOS_GUID)) {
 500                 device_printf(dev,
 501                     "WMI device does not provide the HP BIOS GUID\n");
 502                 return (EINVAL);
 503         }
 504         if (ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 505             ACPI_HP_WMI_EVENT_GUID)) {
 506                 device_printf(dev,
 507                     "HP event GUID detected, installing event handler\n");
 508                 if (ACPI_WMI_INSTALL_EVENT_HANDLER(sc->wmi_dev,
 509                     ACPI_HP_WMI_EVENT_GUID, acpi_hp_notify, dev)) {
 510                         device_printf(dev,
 511                             "Could not install notification handler!\n");
 512                 }
 513                 else {
 514                         sc->has_notify = 1;
 515                 }
 516         }
 517         if ((sc->has_cmi =
 518             ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev, ACPI_HP_WMI_CMI_GUID)
 519             )) {
 520                 device_printf(dev, "HP CMI GUID detected\n");
 521         }
 522
 523         if (sc->has_cmi) {
 524                 sc->hpcmi_dev_t = make_dev(&hpcmi_ops, 0, UID_ROOT,
 525                             GID_WHEEL, 0644, "hpcmi");
 526                 sc->hpcmi_dev_t->si_drv1 = sc;
 527                 sc->hpcmi_open_pid = 0;
 528                 sc->hpcmi_bufptr = -1;
 529         }
 530
 531         ACPI_SERIAL_BEGIN(hp);
 532
 533         sysctl_ctx_init(&sc->sysctl_ctx);
 534         sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
 535                 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO,
 536                 "hp", CTLFLAG_RD, 0, "");
 537
 538         for (int i = 0; acpi_hp_sysctls[i].name != NULL; ++i) {
 539                 arg = 0;
 540                 if ((!sc->has_notify &&
 541                     (acpi_hp_sysctls[i].method ==
 542                         ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON ||
 543                     acpi_hp_sysctls[i].method ==
 544                         ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF ||
 545                     acpi_hp_sysctls[i].method ==
 546                         ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON ||
 547                     acpi_hp_sysctls[i].method ==
 548                         ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF ||
 549                     acpi_hp_sysctls[i].method ==
 550                         ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON ||
 551                     acpi_hp_sysctls[i].method ==
 552                         ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF)) ||
 553                     (arg = acpi_hp_sysctl_get(sc,
 554                     acpi_hp_sysctls[i].method)) < 0) {
 555                         continue;
 556                 }
 557                 if (acpi_hp_sysctls[i].method == ACPI_HP_METHOD_WLAN_ON_AIR) {
 558                         sc->was_wlan_on_air = arg;
 559                 }
 560                 else if (acpi_hp_sysctls[i].method ==
 561                             ACPI_HP_METHOD_BLUETOOTH_ON_AIR) {
 562                         sc->was_bluetooth_on_air = arg;
 563                 }
 564                 else if (acpi_hp_sysctls[i].method ==
 565                             ACPI_HP_METHOD_WWAN_ON_AIR) {
 566                         sc->was_wwan_on_air = arg;
 567                 }
 568
 569                 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
 570                 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
 571                         acpi_hp_sysctls[i].name, acpi_hp_sysctls[i].access,
 572                         sc, i, acpi_hp_sysctl, "I",
 573                         acpi_hp_sysctls[i].description);
 574         }
 575         ACPI_SERIAL_END(hp);
 576
 577         return (0);
 578 }
 579
 580 static int
 581 acpi_hp_detach(device_t dev)
 582 {
 583         int     ret;
 584
 585         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 586         struct acpi_hp_softc *sc = device_get_softc(dev);
 587         if (sc->has_cmi && sc->hpcmi_open_pid != 0) {
 588                 ret = EBUSY;
 589         }
 590         else {
 591                 if (sc->has_notify) {
 592                         ACPI_WMI_REMOVE_EVENT_HANDLER(dev,
 593                             ACPI_HP_WMI_EVENT_GUID);
 594                 }
 595                 if (sc->hpcmi_bufptr != -1) {
 596                         sbuf_delete(&sc->hpcmi_sbuf);
 597                         sc->hpcmi_bufptr = -1;
 598                 }
 599                 sc->hpcmi_open_pid = 0;
 600                 destroy_dev(sc->hpcmi_dev_t);
 601                 ret = 0;
 602         }
 603
 604         return (ret);
 605 }
 606
 607 static int
 608 acpi_hp_sysctl(SYSCTL_HANDLER_ARGS)
 609 {
 610         struct acpi_hp_softc    *sc;
 611         int                     arg;
 612         int                     oldarg;
 613         int                     error = 0;
 614         int                     function;
 615         int                     method;
 616
 617         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 618
 619         sc = (struct acpi_hp_softc *)oidp->oid_arg1;
 620         function = oidp->oid_arg2;
 621         method = acpi_hp_sysctls[function].method;
 622
 623         ACPI_SERIAL_BEGIN(hp);
 624         arg = acpi_hp_sysctl_get(sc, method);
 625         oldarg = arg;
 626         error = sysctl_handle_int(oidp, &arg, 0, req);
 627         if (!error && req->newptr != NULL) {
 628                 error = acpi_hp_sysctl_set(sc, method, arg, oldarg);
 629         }
 630         ACPI_SERIAL_END(hp);
 631
 632         return (error);
 633 }
 634
 635 static int
 636 acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method)
 637 {
 638         int     val = 0;
 639
 640         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 641         ACPI_SERIAL_ASSERT(hp);
 642
 643         switch (method) {
 644         case ACPI_HP_METHOD_WLAN_ENABLED:
 645                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 646                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 647                 val = ((val & HP_MASK_WLAN_ENABLED) != 0);
 648                 break;
 649         case ACPI_HP_METHOD_WLAN_RADIO:
 650                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 651                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 652                 val = ((val & HP_MASK_WLAN_RADIO) != 0);
 653                 break;
 654         case ACPI_HP_METHOD_WLAN_ON_AIR:
 655                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 656                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 657                 val = ((val & HP_MASK_WLAN_ON_AIR) != 0);
 658                 break;
 659         case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 660                 val = sc->wlan_enable_if_radio_on;
 661                 break;
 662         case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 663                 val = sc->wlan_disable_if_radio_off;
 664                 break;
 665         case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 666                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 667                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 668                 val = ((val & HP_MASK_BLUETOOTH_ENABLED) != 0);
 669                 break;
 670         case ACPI_HP_METHOD_BLUETOOTH_RADIO:
 671                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 672                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 673                 val = ((val & HP_MASK_BLUETOOTH_RADIO) != 0);
 674                 break;
 675         case ACPI_HP_METHOD_BLUETOOTH_ON_AIR:
 676                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 677                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 678                 val = ((val & HP_MASK_BLUETOOTH_ON_AIR) != 0);
 679                 break;
 680         case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 681                 val = sc->bluetooth_enable_if_radio_on;
 682                 break;
 683         case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 684                 val = sc->bluetooth_disable_if_radio_off;
 685                 break;
 686         case ACPI_HP_METHOD_WWAN_ENABLED:
 687                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 688                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 689                 val = ((val & HP_MASK_WWAN_ENABLED) != 0);
 690                 break;
 691         case ACPI_HP_METHOD_WWAN_RADIO:
 692                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 693                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 694                 val = ((val & HP_MASK_WWAN_RADIO) != 0);
 695                 break;
 696         case ACPI_HP_METHOD_WWAN_ON_AIR:
 697                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 698                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 699                 val = ((val & HP_MASK_WWAN_ON_AIR) != 0);
 700                 break;
 701         case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 702                 val = sc->wwan_enable_if_radio_on;
 703                 break;
 704         case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 705                 val = sc->wwan_disable_if_radio_off;
 706                 break;
 707         case ACPI_HP_METHOD_ALS:
 708                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 709                         ACPI_HP_WMI_ALS_COMMAND, 0, 0);
 710                 break;
 711         case ACPI_HP_METHOD_DISPLAY:
 712                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 713                         ACPI_HP_WMI_DISPLAY_COMMAND, 0, 0);
 714                 break;
 715         case ACPI_HP_METHOD_HDDTEMP:
 716                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 717                         ACPI_HP_WMI_HDDTEMP_COMMAND, 0, 0);
 718                 break;
 719         case ACPI_HP_METHOD_DOCK:
 720                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 721                         ACPI_HP_WMI_DOCK_COMMAND, 0, 0);
 722                 break;
 723         case ACPI_HP_METHOD_CMI_DETAIL:
 724                 val = sc->cmi_detail;
 725                 break;
 726         case ACPI_HP_METHOD_VERBOSE:
 727                 val = sc->verbose;
 728                 break;
 729         }
 730
 731         return (val);
 732 }
 733
 734 static int
 735 acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method, int arg, int oldarg)
 736 {
 737         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 738         ACPI_SERIAL_ASSERT(hp);
 739
 740         if (method != ACPI_HP_METHOD_CMI_DETAIL &&
 741             method != ACPI_HP_METHOD_VERBOSE)
 742                 arg = arg?1:0;
 743
 744         if (arg != oldarg) {
 745                 switch (method) {
 746                 case ACPI_HP_METHOD_WLAN_ENABLED:
 747                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 748                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 749                                     arg?0x101:0x100));
 750                 case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 751                         sc->wlan_enable_if_radio_on = arg;
 752                         acpi_hp_evaluate_auto_on_off(sc);
 753                         break;
 754                 case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 755                         sc->wlan_disable_if_radio_off = arg;
 756                         acpi_hp_evaluate_auto_on_off(sc);
 757                         break;
 758                 case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 759                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 760                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 761                                     arg?0x202:0x200));
 762                 case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 763                         sc->bluetooth_enable_if_radio_on = arg;
 764                         acpi_hp_evaluate_auto_on_off(sc);
 765                         break;
 766                 case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 767                         sc->bluetooth_disable_if_radio_off = arg?1:0;
 768                         acpi_hp_evaluate_auto_on_off(sc);
 769                         break;
 770                 case ACPI_HP_METHOD_WWAN_ENABLED:
 771                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 772                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 773                                     arg?0x404:0x400));
 774                 case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 775                         sc->wwan_enable_if_radio_on = arg?1:0;
 776                         acpi_hp_evaluate_auto_on_off(sc);
 777                         break;
 778                 case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 779                         sc->wwan_disable_if_radio_off = arg?1:0;
 780                         acpi_hp_evaluate_auto_on_off(sc);
 781                         break;
 782                 case ACPI_HP_METHOD_ALS:
 783                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 784                                     ACPI_HP_WMI_ALS_COMMAND, 1,
 785                                     arg?1:0));
 786                 case ACPI_HP_METHOD_CMI_DETAIL:
 787                         sc->cmi_detail = arg;
 788                         if ((arg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) !=
 789                             (oldarg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE)) {
 790                             sc->cmi_order_size = -1;
 791                         }
 792                         break;
 793                 case ACPI_HP_METHOD_VERBOSE:
 794                         sc->verbose = arg;
 795                         break;
 796                 }
 797         }
 798
 799         return (0);
 800 }
 801
 802 static __inline void
 803 acpi_hp_free_buffer(ACPI_BUFFER* buf) {
 804         if (buf && buf->Pointer) {
 805                 AcpiOsFree(buf->Pointer);
 806         }
 807 }
 808
 809 static void
 810 acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context)
 811 {
 812         device_t dev = context;
 813         ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
 814
 815         struct acpi_hp_softc *sc = device_get_softc(dev);
 816         ACPI_BUFFER response = { ACPI_ALLOCATE_BUFFER, NULL };
 817         ACPI_OBJECT *obj;
 818         ACPI_WMI_GET_EVENT_DATA(sc->wmi_dev, notify, &response);
 819         obj = (ACPI_OBJECT*) response.Pointer;
 820         if (obj && obj->Type == ACPI_TYPE_BUFFER && obj->Buffer.Length == 8) {
 821                 if (*((UINT8 *) obj->Buffer.Pointer) == 0x5) {
 822                         acpi_hp_evaluate_auto_on_off(sc);
 823                 }
 824         }
 825         acpi_hp_free_buffer(&response);
 826 }
 827
 828 static int
 829 acpi_hp_exec_wmi_command(device_t wmi_dev, int command, int is_write, int val)
 830 {
 831         UINT32          params[5] = { 0x55434553,
 832                             is_write?2:1,
 833                             command,
 834                             is_write?4:0,
 835                             val};
 836         UINT32*         result;
 837         ACPI_OBJECT     *obj;
 838         ACPI_BUFFER     in = { sizeof(params), &params };
 839         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 840         int retval;
 841
 842         if (ACPI_FAILURE(ACPI_WMI_EVALUATE_CALL(wmi_dev, ACPI_HP_WMI_BIOS_GUID,
 843                     0, 0x3, &in, &out))) {
 844                 acpi_hp_free_buffer(&out);
 845                 return (-EINVAL);
 846         }
 847         obj = out.Pointer;
 848         if (!obj || obj->Type != ACPI_TYPE_BUFFER) {
 849                 acpi_hp_free_buffer(&out);
 850                 return (-EINVAL);
 851         }
 852         result = (UINT32*) obj->Buffer.Pointer;
 853         retval = result[2];
 854         if (result[1] > 0) {
 855                 retval = result[1];
 856         }
 857         acpi_hp_free_buffer(&out);
 858
 859         return (retval);
 860 }
 861
 862 static __inline char*
 863 acpi_hp_get_string_from_object(ACPI_OBJECT* obj, char* dst, size_t size) {
 864         int     length;
 865
 866         dst[0] = 0;
 867         if (obj->Type == ACPI_TYPE_STRING) {
 868                 length = obj->String.Length+1;
 869                 if (length > size) {
 870                         length = size - 1;
 871                 }
 872                 strlcpy(dst, obj->String.Pointer, length);
 873                 acpi_hp_hex_decode(dst);
 874         }
 875
 876         return (dst);
 877 }
 878
 879
 880 /*
 881  * Read BIOS Setting block in instance "instance".
 882  * The block returned is ACPI_TYPE_PACKAGE which should contain the following
 883  * elements:
 884  * Index Meaning
 885  * 0        Setting Name [string]
 886  * 1        Value (comma separated, asterisk marks the current value) [string]
 887  * 2        Path within the bios hierarchy [string]
 888  * 3        IsReadOnly [int]
 889  * 4        DisplayInUI [int]
 890  * 5        RequiresPhysicalPresence [int]
 891  * 6        Sequence for ordering within the bios settings (absolute) [int]
 892  * 7        Length of prerequisites array [int]
 893  * 8..8+[7] PrerequisiteN [string]
 894  * 9+[7]    Current value (in case of enum) [string] / Array length [int]
 895  * 10+[7]   Enum length [int] / Array values
 896  * 11+[7]ff Enum value at index x [string]
 897  */
 898 static int
 899 acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid, UINT8 instance,
 900     char* outbuf, size_t outsize, UINT32* sequence, int detail)
 901 {
 902         ACPI_OBJECT     *obj;
 903         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 904         int             i;
 905         int             outlen;
 906         int             size = 255;
 907         int             has_enums = 0;
 908         int             valuebase = 0;
 909         char            string_buffer[size];
 910         int             enumbase;
 911
 912         outlen = 0;
 913         outbuf[0] = 0;
 914         if (ACPI_FAILURE(ACPI_WMI_GET_BLOCK(wmi_dev, guid, instance, &out))) {
 915                 acpi_hp_free_buffer(&out);
 916                 return (-EINVAL);
 917         }
 918         obj = out.Pointer;
 919         if (!obj && obj->Type != ACPI_TYPE_PACKAGE) {
 920                 acpi_hp_free_buffer(&out);
 921                 return (-EINVAL);
 922         }
 923
 924         if (obj->Package.Count >= 8 &&
 925             obj->Package.Elements[7].Type == ACPI_TYPE_INTEGER) {
 926             valuebase = 8 + obj->Package.Elements[7].Integer.Value;
 927         }
 928
 929         /* check if this matches our expectations based on limited knowledge */
 930         if (valuebase > 7 && obj->Package.Count > valuebase + 1 &&
 931             obj->Package.Elements[0].Type == ACPI_TYPE_STRING &&
 932             obj->Package.Elements[1].Type == ACPI_TYPE_STRING &&
 933             obj->Package.Elements[2].Type == ACPI_TYPE_STRING &&
 934             obj->Package.Elements[3].Type == ACPI_TYPE_INTEGER &&
 935             obj->Package.Elements[4].Type == ACPI_TYPE_INTEGER &&
 936             obj->Package.Elements[5].Type == ACPI_TYPE_INTEGER &&
 937             obj->Package.Elements[6].Type == ACPI_TYPE_INTEGER &&
 938             obj->Package.Elements[valuebase].Type == ACPI_TYPE_STRING &&
 939             obj->Package.Elements[valuebase+1].Type == ACPI_TYPE_INTEGER &&
 940             obj->Package.Count > valuebase +
 941                 obj->Package.Elements[valuebase+1].Integer.Value
 942            ) {
 943                 enumbase = valuebase + 1;
 944                 if (detail & ACPI_HP_CMI_DETAIL_PATHS) {
 945                         strlcat(outbuf, acpi_hp_get_string_from_object(
 946                                 &obj->Package.Elements[2], string_buffer, size),
 947                                 outsize);
 948                         outlen += 48;
 949                         while (strlen(outbuf) < outlen)
 950                                 strlcat(outbuf, " ", outsize);
 951                 }
 952                 strlcat(outbuf, acpi_hp_get_string_from_object(
 953                                 &obj->Package.Elements[0], string_buffer, size),
 954                                 outsize);
 955                 outlen += 43;
 956                 while (strlen(outbuf) < outlen)
 957                         strlcat(outbuf, " ", outsize);
 958                 strlcat(outbuf, acpi_hp_get_string_from_object(
 959                                 &obj->Package.Elements[valuebase], string_buffer,
 960                                 size),
 961                                 outsize);
 962                 outlen += 21;
 963                 while (strlen(outbuf) < outlen)
 964                         strlcat(outbuf, " ", outsize);
 965                 for (i = 0; i < strlen(outbuf); ++i)
 966                         if (outbuf[i] == '\\')
 967                                 outbuf[i] = '/';
 968                 if (detail & ACPI_HP_CMI_DETAIL_ENUMS) {
 969                         for (i = enumbase + 1; i < enumbase + 1 +
 970                             obj->Package.Elements[enumbase].Integer.Value;
 971                             ++i) {
 972                                 acpi_hp_get_string_from_object(
 973                                     &obj->Package.Elements[i], string_buffer,
 974                                     size);
 975                                 if (strlen(string_buffer) > 1 ||
 976                                     (strlen(string_buffer) == 1 &&
 977                                     string_buffer[0] != ' ')) {
 978                                         if (has_enums)
 979                                                 strlcat(outbuf, "/", outsize);
 980                                         else
 981                                                 strlcat(outbuf, " (", outsize);
 982                                         strlcat(outbuf, string_buffer, outsize);
 983                                         has_enums = 1;
 984                                 }
 985                         }
 986                 }
 987                 if (has_enums)
 988                         strlcat(outbuf, ")", outsize);
 989                 if (detail & ACPI_HP_CMI_DETAIL_FLAGS) {
 990                         strlcat(outbuf, obj->Package.Elements[3].Integer.Value?
 991                             " [ReadOnly]":"", outsize);
 992                         strlcat(outbuf, obj->Package.Elements[4].Integer.Value?
 993                             "":" [NOUI]", outsize);
 994                         strlcat(outbuf, obj->Package.Elements[5].Integer.Value?
 995                             " [RPP]":"", outsize);
 996                 }
 997                 *sequence = (UINT32) obj->Package.Elements[6].Integer.Value;
 998         }
 999         acpi_hp_free_buffer(&out);
1000
1001         return (0);
1002 }
1003
1004
1005
1006 /*
1007  * Convert given two digit hex string (hexin) to an UINT8 referenced
1008  * by byteout.
1009  * Return != 0 if the was a problem (invalid input)
1010  */
1011 static __inline int acpi_hp_hex_to_int(const UINT8 *hexin, UINT8 *byteout)
1012 {
1013         unsigned int    hi;
1014         unsigned int    lo;
1015
1016         hi = hexin[0];
1017         lo = hexin[1];
1018         if ('0' <= hi && hi <= '9')
1019                 hi -= '0';
1020         else if ('A' <= hi && hi <= 'F')
1021                 hi -= ('A' - 10);
1022         else if ('a' <= hi && hi <= 'f')
1023                 hi -= ('a' - 10);
1024         else
1025                 return (1);
1026         if ('0' <= lo && lo <= '9')
1027                 lo -= '0';
1028         else if ('A' <= lo && lo <= 'F')
1029                 lo -= ('A' - 10);
1030         else if ('a' <= lo && lo <= 'f')
1031                 lo -= ('a' - 10);
1032         else
1033                 return (1);
1034         *byteout = (hi << 4) + lo;
1035
1036         return (0);
1037 }
1038
1039
1040 static void
1041 acpi_hp_hex_decode(char* buffer)
1042 {
1043         int     i;
1044         int     length = strlen(buffer);
1045         UINT8   *uin;
1046         UINT8   uout;
1047
1048         if (((int)length/2)*2 == length || length < 10) return;
1049
1050         for (i = 0; i<length; ++i) {
1051                 if (!((i+1)%3)) {
1052                         if (buffer[i] != ' ')
1053                                 return;
1054                 }
1055                 else
1056                         if (!((buffer[i] >= '0' && buffer[i] <= '9') ||
1057                             (buffer[i] >= 'A' && buffer[i] <= 'F')))
1058                                 return;
1059         }
1060
1061         for (i = 0; i<length; i += 3) {
1062                 uin = &buffer[i];
1063                 uout = 0;
1064                 acpi_hp_hex_to_int(uin, &uout);
1065                 buffer[i/3] = (char) uout;
1066         }
1067         buffer[(length+1)/3] = 0;
1068 }
1069
1070
1071 /*
1072  * open hpcmi device
1073  */
1074 static int
1075 acpi_hp_hpcmi_open(struct dev_open_args *ap)
1076 {
1077         struct acpi_hp_softc    *sc;
1078         int                     ret;
1079         struct cdev *dev = ap->a_head.a_dev;
1080         struct thread *td = curthread;
1081
1082         if (dev == NULL || dev->si_drv1 == NULL)
1083                 return (EBADF);
1084         sc = dev->si_drv1;
1085
1086         ACPI_SERIAL_BEGIN(hp);
1087         if (sc->hpcmi_open_pid != 0) {
1088                 ret = EBUSY;
1089         }
1090         else {
1091                 if (sbuf_new(&sc->hpcmi_sbuf, NULL, 4096, SBUF_AUTOEXTEND)
1092                     == NULL) {
1093                         ret = ENXIO;
1094                 } else {
1095                         sc->hpcmi_open_pid = td->td_proc->p_pid;
1096                         sc->hpcmi_bufptr = 0;
1097                         ret = 0;
1098                 }
1099         }
1100         ACPI_SERIAL_END(hp);
1101
1102         return (ret);
1103 }
1104
1105 /*
1106  * close hpcmi device
1107  */
1108 static int
1109 acpi_hp_hpcmi_close(struct dev_close_args *ap)
1110 {
1111         struct acpi_hp_softc    *sc;
1112         int                     ret;
1113         struct cdev *dev = ap->a_head.a_dev;
1114
1115         if (dev == NULL || dev->si_drv1 == NULL)
1116                 return (EBADF);
1117         sc = dev->si_drv1;
1118
1119         ACPI_SERIAL_BEGIN(hp);
1120         if (sc->hpcmi_open_pid == 0) {
1121                 ret = EBADF;
1122         }
1123         else {
1124                 if (sc->hpcmi_bufptr != -1) {
1125                         sbuf_delete(&sc->hpcmi_sbuf);
1126                         sc->hpcmi_bufptr = -1;
1127                 }
1128                 sc->hpcmi_open_pid = 0;
1129                 ret = 0;
1130         }
1131         ACPI_SERIAL_END(hp);
1132
1133         return (ret);
1134 }
1135
1136 /*
1137  * Read from hpcmi bios information
1138  */
1139 static int
1140 acpi_hp_hpcmi_read(struct dev_read_args *ap)
1141 {
1142         struct acpi_hp_softc    *sc;
1143         int                     pos, i, l, ret;
1144         UINT8                   instance;
1145         UINT8                   maxInstance;
1146         UINT32                  sequence;
1147         int                     linesize = 1025;
1148         char                    line[linesize];
1149         struct cdev *dev = ap->a_head.a_dev;
1150         struct uio *buf = ap->a_uio;
1151
1152         if (dev == NULL || dev->si_drv1 == NULL)
1153                 return (EBADF);
1154         sc = dev->si_drv1;
1155
1156         ACPI_SERIAL_BEGIN(hp);
1157         if (sc->hpcmi_open_pid != buf->uio_td->td_proc->p_pid
1158             || sc->hpcmi_bufptr == -1) {
1159                 ret = EBADF;
1160         }
1161         else {
1162                 if (!sbuf_done(&sc->hpcmi_sbuf)) {
1163                         if (sc->cmi_order_size < 0) {
1164                                 maxInstance = sc->has_cmi;
1165                                 if (!(sc->cmi_detail &
1166                                     ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) &&
1167                                     maxInstance > 0) {
1168                                         maxInstance--;
1169                                 }
1170                                 sc->cmi_order_size = 0;
1171                                 for (instance = 0; instance < maxInstance;
1172                                     ++instance) {
1173                                         if (acpi_hp_get_cmi_block(sc->wmi_dev,
1174                                                 ACPI_HP_WMI_CMI_GUID, instance,
1175                                                 line, linesize, &sequence,
1176                                                 sc->cmi_detail)) {
1177                                                 instance = maxInstance;
1178                                         }
1179                                         else {
1180                                                 pos = sc->cmi_order_size;
1181                                                 for (i=0;
1182                                                   i<sc->cmi_order_size && i<127;
1183                                                      ++i) {
1184                                 if (sc->cmi_order[i].sequence > sequence) {
1185                                                                 pos = i;
1186                                                                 break;
1187                                                         }
1188                                                 }
1189                                                 for (i=sc->cmi_order_size;
1190                                                     i>pos;
1191                                                     --i) {
1192                                                 sc->cmi_order[i].sequence =
1193                                                     sc->cmi_order[i-1].sequence;
1194                                                 sc->cmi_order[i].instance =
1195                                                     sc->cmi_order[i-1].instance;
1196                                                 }
1197                                                 sc->cmi_order[pos].sequence =
1198                                                     sequence;
1199                                                 sc->cmi_order[pos].instance =
1200                                                     instance;
1201                                                 sc->cmi_order_size++;
1202                                         }
1203                                 }
1204                         }
1205                         for (i=0; i<sc->cmi_order_size; ++i) {
1206                                 if (!acpi_hp_get_cmi_block(sc->wmi_dev,
1207                                     ACPI_HP_WMI_CMI_GUID,
1208                                     sc->cmi_order[i].instance, line, linesize,
1209                                     &sequence, sc->cmi_detail)) {
1210                                         sbuf_printf(&sc->hpcmi_sbuf, "%s\n", line);
1211                                 }
1212                         }
1213                         sbuf_finish(&sc->hpcmi_sbuf);
1214                 }
1215                 if (sbuf_len(&sc->hpcmi_sbuf) <= 0) {
1216                         sbuf_delete(&sc->hpcmi_sbuf);
1217                         sc->hpcmi_bufptr = -1;
1218                         sc->hpcmi_open_pid = 0;
1219                         ret = ENOMEM;
1220                 } else {
1221                         l = min(buf->uio_resid, sbuf_len(&sc->hpcmi_sbuf) -
1222                             sc->hpcmi_bufptr);
1223                         ret = (l > 0)?uiomove(sbuf_data(&sc->hpcmi_sbuf) +
1224                             sc->hpcmi_bufptr, l, buf) : 0;
1225                         sc->hpcmi_bufptr += l;
1226                 }
1227         }
1228         ACPI_SERIAL_END(hp);
1229
1230         return (ret);
1231 }