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  *
  26  * $FreeBSD: src/sys/dev/acpi_support/acpi_hp.c,v 1.3 2009/07/03 21:12:37 rpaulo
  27  */
  28
  29 /*
  30  * Driver for extra ACPI-controlled features found on HP laptops
  31  * that use a WMI enabled BIOS (e.g. HP Compaq 8510p and 6510p).
  32  * Allows to control and read status of integrated hardware and read
  33  * BIOS settings through CMI.
  34  * Inspired by the hp-wmi driver, which implements a subset of these
  35  * features (hotkeys) on Linux.
  36  *
  37  * HP CMI whitepaper:
  38  *     http://h20331.www2.hp.com/Hpsub/downloads/cmi_whitepaper.pdf
  39  * wmi-hp for Linux:
  40  *     http://www.kernel.org
  41  * WMI and ACPI:
  42  *     http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx
  43  */
  44
  45 #include "opt_acpi.h"
  46 #include <sys/param.h>
  47 #include <sys/conf.h>
  48 #include <sys/uio.h>
  49 #include <sys/proc.h>
  50 #include <sys/kernel.h>
  51 #include <sys/bus.h>
  52 #include <sys/sbuf.h>
  53 #include <sys/module.h>
  54 #include <sys/sysctl.h>
  55 #include <sys/device.h>
  56
  57 #include "acpi.h"
  58 #include "accommon.h"
  59 #include <dev/acpica5/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 #define sbuf_done(s)            ((s)->s_flags & SBUF_FINISHED)
 113
 114 struct acpi_hp_inst_seq_pair {
 115         UINT32  sequence;       /* sequence number as suggested by cmi bios */
 116         UINT8   instance;       /* object instance on guid */
 117 };
 118
 119 struct acpi_hp_softc {
 120         device_t        dev;
 121         ACPI_HANDLE     handle;
 122         device_t        wmi_dev;
 123         int             has_notify;             /* notification GUID found */
 124         int             has_cmi;                /* CMI GUID found */
 125         int             cmi_detail;             /* CMI detail level
 126                                                    (set by sysctl) */
 127         int             verbose;                /* add debug output */
 128         int             wlan_enable_if_radio_on;        /* set by sysctl */
 129         int             wlan_disable_if_radio_off;      /* set by sysctl */
 130         int             bluetooth_enable_if_radio_on;   /* set by sysctl */
 131         int             bluetooth_disable_if_radio_off; /* set by sysctl */
 132         int             wwan_enable_if_radio_on;        /* set by sysctl */
 133         int             wwan_disable_if_radio_off;      /* set by sysctl */
 134         int             was_wlan_on_air;                /* last known WLAN
 135                                                            on air status */
 136         int             was_bluetooth_on_air;           /* last known BT
 137                                                            on air status */
 138         int             was_wwan_on_air;                /* last known WWAN
 139                                                            on air status */
 140         struct sysctl_ctx_list  sysctl_ctx;
 141         struct sysctl_oid       *sysctl_tree;
 142         struct cdev     *hpcmi_dev_t;           /* hpcmi device handle */
 143         struct sbuf     hpcmi_sbuf;             /* /dev/hpcmi output sbuf */
 144         pid_t           hpcmi_open_pid;         /* pid operating on
 145                                                    /dev/hpcmi */
 146         int             hpcmi_bufptr;           /* current pointer position
 147                                                    in /dev/hpcmi output buffer
 148                                                  */
 149         int             cmi_order_size;         /* size of cmi_order list */
 150         struct acpi_hp_inst_seq_pair cmi_order[128];    /* list of CMI
 151                              instances ordered by BIOS suggested sequence */
 152 };
 153
 154 static struct {
 155         char    *name;
 156         int     method;
 157         char    *description;
 158         int     access;
 159 } acpi_hp_sysctls[] = {
 160         {
 161                 .name           = "wlan_enabled",
 162                 .method         = ACPI_HP_METHOD_WLAN_ENABLED,
 163                 .description    = "Enable/Disable WLAN (WiFi)",
 164                 .access         = CTLTYPE_INT | CTLFLAG_RW
 165         },
 166         {
 167                 .name           = "wlan_radio",
 168                 .method         = ACPI_HP_METHOD_WLAN_RADIO,
 169                 .description    = "WLAN radio status",
 170                 .access         = CTLTYPE_INT | CTLFLAG_RD
 171         },
 172         {
 173                 .name           = "wlan_on_air",
 174                 .method         = ACPI_HP_METHOD_WLAN_ON_AIR,
 175                 .description    = "WLAN radio ready to use (enabled and radio)",
 176                 .access         = CTLTYPE_INT | CTLFLAG_RD
 177         },
 178         {
 179                 .name           = "wlan_enable_if_radio_on",
 180                 .method         = ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON,
 181                 .description    = "Enable WLAN if radio is turned on",
 182                 .access         = CTLTYPE_INT | CTLFLAG_RW
 183         },
 184         {
 185                 .name           = "wlan_disable_if_radio_off",
 186                 .method         = ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF,
 187                 .description    = "Disable WLAN if radio is turned off",
 188                 .access         = CTLTYPE_INT | CTLFLAG_RW
 189         },
 190         {
 191                 .name           = "bt_enabled",
 192                 .method         = ACPI_HP_METHOD_BLUETOOTH_ENABLED,
 193                 .description    = "Enable/Disable Bluetooth",
 194                 .access         = CTLTYPE_INT | CTLFLAG_RW
 195         },
 196         {
 197                 .name           = "bt_radio",
 198                 .method         = ACPI_HP_METHOD_BLUETOOTH_RADIO,
 199                 .description    = "Bluetooth radio status",
 200                 .access         = CTLTYPE_INT | CTLFLAG_RD
 201         },
 202         {
 203                 .name           = "bt_on_air",
 204                 .method         = ACPI_HP_METHOD_BLUETOOTH_ON_AIR,
 205                 .description    = "Bluetooth radio ready to use"
 206                                     " (enabled and radio)",
 207                 .access         = CTLTYPE_INT | CTLFLAG_RD
 208         },
 209         {
 210                 .name           = "bt_enable_if_radio_on",
 211                 .method         = ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON,
 212                 .description    = "Enable bluetooth if radio is turned on",
 213                 .access         = CTLTYPE_INT | CTLFLAG_RW
 214         },
 215         {
 216                 .name           = "bt_disable_if_radio_off",
 217                 .method         = ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF,
 218                 .description    = "Disable bluetooth if radio is turned off",
 219                 .access         = CTLTYPE_INT | CTLFLAG_RW
 220         },
 221         {
 222                 .name           = "wwan_enabled",
 223                 .method         = ACPI_HP_METHOD_WWAN_ENABLED,
 224                 .description    = "Enable/Disable WWAN (UMTS)",
 225                 .access         = CTLTYPE_INT | CTLFLAG_RW
 226         },
 227         {
 228                 .name           = "wwan_radio",
 229                 .method         = ACPI_HP_METHOD_WWAN_RADIO,
 230                 .description    = "WWAN radio status",
 231                 .access         = CTLTYPE_INT | CTLFLAG_RD
 232         },
 233         {
 234                 .name           = "wwan_on_air",
 235                 .method         = ACPI_HP_METHOD_WWAN_ON_AIR,
 236                 .description    = "WWAN radio ready to use (enabled and radio)",
 237                 .access         = CTLTYPE_INT | CTLFLAG_RD
 238         },
 239         {
 240                 .name           = "wwan_enable_if_radio_on",
 241                 .method         = ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON,
 242                 .description    = "Enable WWAN if radio is turned on",
 243                 .access         = CTLTYPE_INT | CTLFLAG_RW
 244         },
 245         {
 246                 .name           = "wwan_disable_if_radio_off",
 247                 .method         = ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF,
 248                 .description    = "Disable WWAN if radio is turned off",
 249                 .access         = CTLTYPE_INT | CTLFLAG_RW
 250         },
 251         {
 252                 .name           = "als_enabled",
 253                 .method         = ACPI_HP_METHOD_ALS,
 254                 .description    = "Enable/Disable ALS (Ambient light sensor)",
 255                 .access         = CTLTYPE_INT | CTLFLAG_RW
 256         },
 257         {
 258                 .name           = "display",
 259                 .method         = ACPI_HP_METHOD_DISPLAY,
 260                 .description    = "Display status",
 261                 .access         = CTLTYPE_INT | CTLFLAG_RD
 262         },
 263         {
 264                 .name           = "hdd_temperature",
 265                 .method         = ACPI_HP_METHOD_HDDTEMP,
 266                 .description    = "HDD temperature",
 267                 .access         = CTLTYPE_INT | CTLFLAG_RD
 268         },
 269         {
 270                 .name           = "is_docked",
 271                 .method         = ACPI_HP_METHOD_DOCK,
 272                 .description    = "Docking station status",
 273                 .access         = CTLTYPE_INT | CTLFLAG_RD
 274         },
 275         {
 276                 .name           = "cmi_detail",
 277                 .method         = ACPI_HP_METHOD_CMI_DETAIL,
 278                 .description    = "Details shown in CMI output "
 279                                     "(cat /dev/hpcmi)",
 280                 .access         = CTLTYPE_INT | CTLFLAG_RW
 281         },
 282         {
 283                 .name           = "verbose",
 284                 .method         = ACPI_HP_METHOD_VERBOSE,
 285                 .description    = "Verbosity level",
 286                 .access         = CTLTYPE_INT | CTLFLAG_RW
 287         },
 288
 289         { NULL, 0, NULL, 0 }
 290 };
 291
 292 ACPI_SERIAL_DECL(hp, "HP ACPI-WMI Mapping");
 293
 294 static int      acpi_hp_probe(device_t dev);
 295 static int      acpi_hp_attach(device_t dev);
 296 static int      acpi_hp_detach(device_t dev);
 297
 298 static void     acpi_hp_evaluate_auto_on_off(struct acpi_hp_softc* sc);
 299 static int      acpi_hp_sysctl(SYSCTL_HANDLER_ARGS);
 300 static int      acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method,
 301                     int arg, int oldarg);
 302 static int      acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method);
 303 static int      acpi_hp_exec_wmi_command(device_t wmi_dev, int command,
 304                     int is_write, int val);
 305 static void     acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context);
 306 static int      acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid,
 307                     UINT8 instance, char* outbuf, size_t outsize,
 308                     UINT32* sequence, int detail);
 309 static void     acpi_hp_hex_decode(char* buffer);
 310
 311 #if defined (__FreeBSD__)
 312 static d_open_t acpi_hp_hpcmi_open;
 313 static d_close_t acpi_hp_hpcmi_close;
 314 static d_read_t acpi_hp_hpcmi_read;
 315 #else
 316 static int acpi_hp_hpcmi_open(struct dev_open_args *ap);
 317 static int acpi_hp_hpcmi_close(struct dev_close_args *ap);
 318 static int acpi_hp_hpcmi_read(struct dev_read_args *ap);
 319 #endif
 320
 321 /* handler /dev/hpcmi device */
 322 static struct dev_ops hpcmi_ops = {
 323         { .name = "hpcmi" },
 324         .d_open = acpi_hp_hpcmi_open,
 325         .d_close = acpi_hp_hpcmi_close,
 326         .d_read = acpi_hp_hpcmi_read,
 327 };
 328
 329 static device_method_t acpi_hp_methods[] = {
 330         DEVMETHOD(device_probe, acpi_hp_probe),
 331         DEVMETHOD(device_attach, acpi_hp_attach),
 332         DEVMETHOD(device_detach, acpi_hp_detach),
 333         {0, 0}
 334 };
 335
 336 static driver_t acpi_hp_driver = {
 337         "acpi_hp",
 338         acpi_hp_methods,
 339         sizeof(struct acpi_hp_softc),
 340 };
 341
 342 static devclass_t acpi_hp_devclass;
 343
 344 DRIVER_MODULE(acpi_hp, acpi, acpi_hp_driver, acpi_hp_devclass,
 345                 0, 0);
 346 MODULE_DEPEND(acpi_hp, acpi_wmi, 1, 1, 1);
 347 MODULE_DEPEND(acpi_hp, acpi, 1, 1, 1);
 348
 349 static void
 350 acpi_hp_evaluate_auto_on_off(struct acpi_hp_softc *sc)
 351 {
 352         int     wireless;
 353         int     new_wlan_status;
 354         int     new_bluetooth_status;
 355         int     new_wwan_status;
 356
 357         wireless = acpi_hp_exec_wmi_command(sc->wmi_dev,
 358                     ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 359         new_wlan_status = -1;
 360         new_bluetooth_status = -1;
 361         new_wwan_status = -1;
 362
 363         if (sc->verbose)
 364                 device_printf(sc->wmi_dev, "Wireless status is %x\n", wireless);
 365         if (sc->wlan_disable_if_radio_off && !(wireless & HP_MASK_WLAN_RADIO)
 366             &&  (wireless & HP_MASK_WLAN_ENABLED)) {
 367                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 368                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x100);
 369                 new_wlan_status = 0;
 370         }
 371         else if (sc->wlan_enable_if_radio_on && (wireless & HP_MASK_WLAN_RADIO)
 372                 &&  !(wireless & HP_MASK_WLAN_ENABLED)) {
 373                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 374                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x101);
 375                 new_wlan_status = 1;
 376         }
 377         if (sc->bluetooth_disable_if_radio_off &&
 378             !(wireless & HP_MASK_BLUETOOTH_RADIO) &&
 379             (wireless & HP_MASK_BLUETOOTH_ENABLED)) {
 380                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 381                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x200);
 382                 new_bluetooth_status = 0;
 383         }
 384         else if (sc->bluetooth_enable_if_radio_on &&
 385                 (wireless & HP_MASK_BLUETOOTH_RADIO) &&
 386                 !(wireless & HP_MASK_BLUETOOTH_ENABLED)) {
 387                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 388                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x202);
 389                 new_bluetooth_status = 1;
 390         }
 391         if (sc->wwan_disable_if_radio_off &&
 392             !(wireless & HP_MASK_WWAN_RADIO) &&
 393             (wireless & HP_MASK_WWAN_ENABLED)) {
 394                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 395                 ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x400);
 396                 new_wwan_status = 0;
 397         }
 398         else if (sc->wwan_enable_if_radio_on &&
 399                 (wireless & HP_MASK_WWAN_RADIO) &&
 400                 !(wireless & HP_MASK_WWAN_ENABLED)) {
 401                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 402                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x404);
 403                 new_wwan_status = 1;
 404         }
 405
 406         if (new_wlan_status == -1) {
 407                 new_wlan_status = (wireless & HP_MASK_WLAN_ON_AIR);
 408                 if ((new_wlan_status?1:0) != sc->was_wlan_on_air) {
 409                         sc->was_wlan_on_air = sc->was_wlan_on_air?0:1;
 410                         if (sc->verbose)
 411                                 device_printf(sc->wmi_dev,
 412                                     "WLAN on air changed to %i "
 413                                     "(new_wlan_status is %i)\n",
 414                                     sc->was_wlan_on_air, new_wlan_status);
 415                         acpi_UserNotify("HP", sc->handle,
 416                             0xc0+sc->was_wlan_on_air);
 417                 }
 418         }
 419         if (new_bluetooth_status == -1) {
 420                 new_bluetooth_status = (wireless & HP_MASK_BLUETOOTH_ON_AIR);
 421                 if ((new_bluetooth_status?1:0) != sc->was_bluetooth_on_air) {
 422                         sc->was_bluetooth_on_air = sc->was_bluetooth_on_air?
 423                             0:1;
 424                         if (sc->verbose)
 425                                 device_printf(sc->wmi_dev,
 426                                     "BLUETOOTH on air changed"
 427                                     " to %i (new_bluetooth_status is %i)\n",
 428                                     sc->was_bluetooth_on_air,
 429                                     new_bluetooth_status);
 430                         acpi_UserNotify("HP", sc->handle,
 431                             0xd0+sc->was_bluetooth_on_air);
 432                 }
 433         }
 434         if (new_wwan_status == -1) {
 435                 new_wwan_status = (wireless & HP_MASK_WWAN_ON_AIR);
 436                 if ((new_wwan_status?1:0) != sc->was_wwan_on_air) {
 437                         sc->was_wwan_on_air = sc->was_wwan_on_air?0:1;
 438                         if (sc->verbose)
 439                                 device_printf(sc->wmi_dev,
 440                                     "WWAN on air changed to %i"
 441                                     " (new_wwan_status is %i)\n",
 442                                     sc->was_wwan_on_air, new_wwan_status);
 443                         acpi_UserNotify("HP", sc->handle,
 444                             0xe0+sc->was_wwan_on_air);
 445                 }
 446         }
 447 }
 448
 449 static int
 450 acpi_hp_probe(device_t dev)
 451 {
 452         if (acpi_disabled("hp") || device_get_unit(dev) != 0)
 453                 return (ENXIO);
 454         device_set_desc(dev, "HP ACPI-WMI Mapping");
 455
 456         return (0);
 457 }
 458
 459 static int
 460 acpi_hp_attach(device_t dev)
 461 {
 462         struct acpi_hp_softc    *sc;
 463         struct acpi_softc       *acpi_sc;
 464         devclass_t              wmi_devclass;
 465         int                     arg;
 466
 467         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 468
 469         sc = device_get_softc(dev);
 470         sc->dev = dev;
 471         sc->handle = acpi_get_handle(dev);
 472         sc->has_notify = 0;
 473         sc->has_cmi = 0;
 474         sc->bluetooth_enable_if_radio_on = 0;
 475         sc->bluetooth_disable_if_radio_off = 0;
 476         sc->wlan_enable_if_radio_on = 0;
 477         sc->wlan_disable_if_radio_off = 0;
 478         sc->wlan_enable_if_radio_on = 0;
 479         sc->wlan_disable_if_radio_off = 0;
 480         sc->was_wlan_on_air = 0;
 481         sc->was_bluetooth_on_air = 0;
 482         sc->was_wwan_on_air = 0;
 483         sc->cmi_detail = 0;
 484         sc->cmi_order_size = -1;
 485         sc->verbose = 0;
 486         memset(sc->cmi_order, 0, sizeof(sc->cmi_order));
 487         acpi_sc = acpi_device_get_parent_softc(dev);
 488
 489         if (!(wmi_devclass = devclass_find ("acpi_wmi"))) {
 490                 device_printf(dev, "Couldn't find acpi_wmi devclass\n");
 491                 return (EINVAL);
 492         }
 493         if (!(sc->wmi_dev = devclass_get_device(wmi_devclass, 0))) {
 494                 device_printf(dev, "Couldn't find acpi_wmi device\n");
 495                 return (EINVAL);
 496         }
 497         if (!ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 498             ACPI_HP_WMI_BIOS_GUID)) {
 499                 device_printf(dev,
 500                     "WMI device does not provide the HP BIOS GUID\n");
 501                 return (EINVAL);
 502         }
 503         if (ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 504             ACPI_HP_WMI_EVENT_GUID)) {
 505                 device_printf(dev,
 506                     "HP event GUID detected, installing event handler\n");
 507                 if (ACPI_WMI_INSTALL_EVENT_HANDLER(sc->wmi_dev,
 508                     ACPI_HP_WMI_EVENT_GUID, acpi_hp_notify, dev)) {
 509                         device_printf(dev,
 510                             "Could not install notification handler!\n");
 511                 }
 512                 else {
 513                         sc->has_notify = 1;
 514                 }
 515         }
 516         if ((sc->has_cmi =
 517             ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev, ACPI_HP_WMI_CMI_GUID)
 518             )) {
 519                 device_printf(dev, "HP CMI GUID detected\n");
 520         }
 521
 522         if (sc->has_cmi) {
 523                 sc->hpcmi_dev_t = make_dev(&hpcmi_ops, 0, UID_ROOT,
 524                             GID_WHEEL, 0644, "hpcmi");
 525                 sc->hpcmi_dev_t->si_drv1 = sc;
 526                 sc->hpcmi_open_pid = 0;
 527                 sc->hpcmi_bufptr = -1;
 528         }
 529
 530         ACPI_SERIAL_BEGIN(hp);
 531
 532         sysctl_ctx_init(&sc->sysctl_ctx);
 533         sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
 534                 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO,
 535                 "hp", CTLFLAG_RD, 0, "");
 536
 537         for (int i = 0; acpi_hp_sysctls[i].name != NULL; ++i) {
 538                 arg = 0;
 539                 if ((!sc->has_notify &&
 540                     (acpi_hp_sysctls[i].method ==
 541                         ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON ||
 542                     acpi_hp_sysctls[i].method ==
 543                         ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF ||
 544                     acpi_hp_sysctls[i].method ==
 545                         ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON ||
 546                     acpi_hp_sysctls[i].method ==
 547                         ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF ||
 548                     acpi_hp_sysctls[i].method ==
 549                         ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON ||
 550                     acpi_hp_sysctls[i].method ==
 551                         ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF)) ||
 552                     (arg = acpi_hp_sysctl_get(sc,
 553                     acpi_hp_sysctls[i].method)) < 0) {
 554                         continue;
 555                 }
 556                 if (acpi_hp_sysctls[i].method == ACPI_HP_METHOD_WLAN_ON_AIR) {
 557                         sc->was_wlan_on_air = arg;
 558                 }
 559                 else if (acpi_hp_sysctls[i].method ==
 560                             ACPI_HP_METHOD_BLUETOOTH_ON_AIR) {
 561                         sc->was_bluetooth_on_air = arg;
 562                 }
 563                 else if (acpi_hp_sysctls[i].method ==
 564                             ACPI_HP_METHOD_WWAN_ON_AIR) {
 565                         sc->was_wwan_on_air = arg;
 566                 }
 567
 568                 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
 569                 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
 570                         acpi_hp_sysctls[i].name, acpi_hp_sysctls[i].access,
 571                         sc, i, acpi_hp_sysctl, "I",
 572                         acpi_hp_sysctls[i].description);
 573         }
 574         ACPI_SERIAL_END(hp);
 575
 576         return (0);
 577 }
 578
 579 static int
 580 acpi_hp_detach(device_t dev)
 581 {
 582         int     ret;
 583
 584         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 585         struct acpi_hp_softc *sc = device_get_softc(dev);
 586         if (sc->has_cmi && sc->hpcmi_open_pid != 0) {
 587                 ret = EBUSY;
 588         }
 589         else {
 590                 if (sc->has_notify) {
 591                         ACPI_WMI_REMOVE_EVENT_HANDLER(dev,
 592                             ACPI_HP_WMI_EVENT_GUID);
 593                 }
 594                 if (sc->hpcmi_bufptr != -1) {
 595                         sbuf_delete(&sc->hpcmi_sbuf);
 596                         sc->hpcmi_bufptr = -1;
 597                 }
 598                 sc->hpcmi_open_pid = 0;
 599                 destroy_dev(sc->hpcmi_dev_t);
 600                 ret = 0;
 601         }
 602
 603         return (ret);
 604 }
 605
 606 static int
 607 acpi_hp_sysctl(SYSCTL_HANDLER_ARGS)
 608 {
 609         struct acpi_hp_softc    *sc;
 610         int                     arg;
 611         int                     oldarg;
 612         int                     error = 0;
 613         int                     function;
 614         int                     method;
 615
 616         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 617
 618         sc = (struct acpi_hp_softc *)oidp->oid_arg1;
 619         function = oidp->oid_arg2;
 620         method = acpi_hp_sysctls[function].method;
 621
 622         ACPI_SERIAL_BEGIN(hp);
 623         arg = acpi_hp_sysctl_get(sc, method);
 624         oldarg = arg;
 625         error = sysctl_handle_int(oidp, &arg, 0, req);
 626         if (!error && req->newptr != NULL) {
 627                 error = acpi_hp_sysctl_set(sc, method, arg, oldarg);
 628         }
 629         ACPI_SERIAL_END(hp);
 630
 631         return (error);
 632 }
 633
 634 static int
 635 acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method)
 636 {
 637         int     val = 0;
 638
 639         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 640         ACPI_SERIAL_ASSERT(hp);
 641
 642         switch (method) {
 643         case ACPI_HP_METHOD_WLAN_ENABLED:
 644                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 645                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 646                 val = ((val & HP_MASK_WLAN_ENABLED) != 0);
 647                 break;
 648         case ACPI_HP_METHOD_WLAN_RADIO:
 649                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 650                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 651                 val = ((val & HP_MASK_WLAN_RADIO) != 0);
 652                 break;
 653         case ACPI_HP_METHOD_WLAN_ON_AIR:
 654                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 655                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 656                 val = ((val & HP_MASK_WLAN_ON_AIR) != 0);
 657                 break;
 658         case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 659                 val = sc->wlan_enable_if_radio_on;
 660                 break;
 661         case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 662                 val = sc->wlan_disable_if_radio_off;
 663                 break;
 664         case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 665                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 666                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 667                 val = ((val & HP_MASK_BLUETOOTH_ENABLED) != 0);
 668                 break;
 669         case ACPI_HP_METHOD_BLUETOOTH_RADIO:
 670                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 671                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 672                 val = ((val & HP_MASK_BLUETOOTH_RADIO) != 0);
 673                 break;
 674         case ACPI_HP_METHOD_BLUETOOTH_ON_AIR:
 675                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 676                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 677                 val = ((val & HP_MASK_BLUETOOTH_ON_AIR) != 0);
 678                 break;
 679         case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 680                 val = sc->bluetooth_enable_if_radio_on;
 681                 break;
 682         case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 683                 val = sc->bluetooth_disable_if_radio_off;
 684                 break;
 685         case ACPI_HP_METHOD_WWAN_ENABLED:
 686                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 687                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 688                 val = ((val & HP_MASK_WWAN_ENABLED) != 0);
 689                 break;
 690         case ACPI_HP_METHOD_WWAN_RADIO:
 691                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 692                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 693                 val = ((val & HP_MASK_WWAN_RADIO) != 0);
 694                 break;
 695         case ACPI_HP_METHOD_WWAN_ON_AIR:
 696                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 697                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 698                 val = ((val & HP_MASK_WWAN_ON_AIR) != 0);
 699                 break;
 700         case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 701                 val = sc->wwan_enable_if_radio_on;
 702                 break;
 703         case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 704                 val = sc->wwan_disable_if_radio_off;
 705                 break;
 706         case ACPI_HP_METHOD_ALS:
 707                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 708                         ACPI_HP_WMI_ALS_COMMAND, 0, 0);
 709                 break;
 710         case ACPI_HP_METHOD_DISPLAY:
 711                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 712                         ACPI_HP_WMI_DISPLAY_COMMAND, 0, 0);
 713                 break;
 714         case ACPI_HP_METHOD_HDDTEMP:
 715                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 716                         ACPI_HP_WMI_HDDTEMP_COMMAND, 0, 0);
 717                 break;
 718         case ACPI_HP_METHOD_DOCK:
 719                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 720                         ACPI_HP_WMI_DOCK_COMMAND, 0, 0);
 721                 break;
 722         case ACPI_HP_METHOD_CMI_DETAIL:
 723                 val = sc->cmi_detail;
 724                 break;
 725         case ACPI_HP_METHOD_VERBOSE:
 726                 val = sc->verbose;
 727                 break;
 728         }
 729
 730         return (val);
 731 }
 732
 733 static int
 734 acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method, int arg, int oldarg)
 735 {
 736         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 737         ACPI_SERIAL_ASSERT(hp);
 738
 739         if (method != ACPI_HP_METHOD_CMI_DETAIL &&
 740             method != ACPI_HP_METHOD_VERBOSE)
 741                 arg = arg?1:0;
 742
 743         if (arg != oldarg) {
 744                 switch (method) {
 745                 case ACPI_HP_METHOD_WLAN_ENABLED:
 746                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 747                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 748                                     arg?0x101:0x100));
 749                 case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 750                         sc->wlan_enable_if_radio_on = arg;
 751                         acpi_hp_evaluate_auto_on_off(sc);
 752                         break;
 753                 case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 754                         sc->wlan_disable_if_radio_off = arg;
 755                         acpi_hp_evaluate_auto_on_off(sc);
 756                         break;
 757                 case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 758                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 759                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 760                                     arg?0x202:0x200));
 761                 case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 762                         sc->bluetooth_enable_if_radio_on = arg;
 763                         acpi_hp_evaluate_auto_on_off(sc);
 764                         break;
 765                 case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 766                         sc->bluetooth_disable_if_radio_off = arg?1:0;
 767                         acpi_hp_evaluate_auto_on_off(sc);
 768                         break;
 769                 case ACPI_HP_METHOD_WWAN_ENABLED:
 770                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 771                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 772                                     arg?0x404:0x400));
 773                 case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 774                         sc->wwan_enable_if_radio_on = arg?1:0;
 775                         acpi_hp_evaluate_auto_on_off(sc);
 776                         break;
 777                 case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 778                         sc->wwan_disable_if_radio_off = arg?1:0;
 779                         acpi_hp_evaluate_auto_on_off(sc);
 780                         break;
 781                 case ACPI_HP_METHOD_ALS:
 782                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 783                                     ACPI_HP_WMI_ALS_COMMAND, 1,
 784                                     arg?1:0));
 785                 case ACPI_HP_METHOD_CMI_DETAIL:
 786                         sc->cmi_detail = arg;
 787                         if ((arg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) !=
 788                             (oldarg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE)) {
 789                             sc->cmi_order_size = -1;
 790                         }
 791                         break;
 792                 case ACPI_HP_METHOD_VERBOSE:
 793                         sc->verbose = arg;
 794                         break;
 795                 }
 796         }
 797
 798         return (0);
 799 }
 800
 801 static __inline void
 802 acpi_hp_free_buffer(ACPI_BUFFER* buf) {
 803         if (buf && buf->Pointer) {
 804                 AcpiOsFree(buf->Pointer);
 805         }
 806 }
 807
 808 static void
 809 acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context)
 810 {
 811         device_t dev = context;
 812         ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
 813
 814         struct acpi_hp_softc *sc = device_get_softc(dev);
 815         ACPI_BUFFER response = { ACPI_ALLOCATE_BUFFER, NULL };
 816         ACPI_OBJECT *obj;
 817         ACPI_WMI_GET_EVENT_DATA(sc->wmi_dev, notify, &response);
 818         obj = (ACPI_OBJECT*) response.Pointer;
 819         if (obj && obj->Type == ACPI_TYPE_BUFFER && obj->Buffer.Length == 8) {
 820                 if (*((UINT8 *) obj->Buffer.Pointer) == 0x5) {
 821                         acpi_hp_evaluate_auto_on_off(sc);
 822                 }
 823         }
 824         acpi_hp_free_buffer(&response);
 825 }
 826
 827 static int
 828 acpi_hp_exec_wmi_command(device_t wmi_dev, int command, int is_write, int val)
 829 {
 830         UINT32          params[5] = { 0x55434553,
 831                             is_write?2:1,
 832                             command,
 833                             is_write?4:0,
 834                             val};
 835         UINT32*         result;
 836         ACPI_OBJECT     *obj;
 837         ACPI_BUFFER     in = { sizeof(params), &params };
 838         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 839         int retval;
 840
 841         if (ACPI_FAILURE(ACPI_WMI_EVALUATE_CALL(wmi_dev, ACPI_HP_WMI_BIOS_GUID,
 842                     0, 0x3, &in, &out))) {
 843                 acpi_hp_free_buffer(&out);
 844                 return (-EINVAL);
 845         }
 846         obj = out.Pointer;
 847         if (!obj || obj->Type != ACPI_TYPE_BUFFER) {
 848                 acpi_hp_free_buffer(&out);
 849                 return (-EINVAL);
 850         }
 851         result = (UINT32*) obj->Buffer.Pointer;
 852         retval = result[2];
 853         if (result[1] > 0) {
 854                 retval = result[1];
 855         }
 856         acpi_hp_free_buffer(&out);
 857
 858         return (retval);
 859 }
 860
 861 static __inline char*
 862 acpi_hp_get_string_from_object(ACPI_OBJECT* obj, char* dst, size_t size) {
 863         int     length;
 864
 865         dst[0] = 0;
 866         if (obj->Type == ACPI_TYPE_STRING) {
 867                 length = obj->String.Length+1;
 868                 if (length > size) {
 869                         length = size - 1;
 870                 }
 871                 strlcpy(dst, obj->String.Pointer, length);
 872                 acpi_hp_hex_decode(dst);
 873         }
 874
 875         return (dst);
 876 }
 877
 878
 879 /*
 880  * Read BIOS Setting block in instance "instance".
 881  * The block returned is ACPI_TYPE_PACKAGE which should contain the following
 882  * elements:
 883  * Index Meaning
 884  * 0        Setting Name [string]
 885  * 1        Value (comma separated, asterisk marks the current value) [string]
 886  * 2        Path within the bios hierarchy [string]
 887  * 3        IsReadOnly [int]
 888  * 4        DisplayInUI [int]
 889  * 5        RequiresPhysicalPresence [int]
 890  * 6        Sequence for ordering within the bios settings (absolute) [int]
 891  * 7        Length of prerequisites array [int]
 892  * 8..8+[7] PrerequisiteN [string]
 893  * 9+[7]    Current value (in case of enum) [string] / Array length [int]
 894  * 10+[7]   Enum length [int] / Array values
 895  * 11+[7]ff Enum value at index x [string]
 896  */
 897 static int
 898 acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid, UINT8 instance,
 899     char* outbuf, size_t outsize, UINT32* sequence, int detail)
 900 {
 901         ACPI_OBJECT     *obj;
 902         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 903         int             i;
 904         int             outlen;
 905         int             size = 255;
 906         int             has_enums = 0;
 907         int             valuebase = 0;
 908         char            string_buffer[size];
 909         int             enumbase;
 910
 911         outlen = 0;
 912         outbuf[0] = 0;
 913         if (ACPI_FAILURE(ACPI_WMI_GET_BLOCK(wmi_dev, guid, instance, &out))) {
 914                 acpi_hp_free_buffer(&out);
 915                 return (-EINVAL);
 916         }
 917         obj = out.Pointer;
 918         if (!obj && obj->Type != ACPI_TYPE_PACKAGE) {
 919                 acpi_hp_free_buffer(&out);
 920                 return (-EINVAL);
 921         }
 922
 923         if (obj->Package.Count >= 8 &&
 924             obj->Package.Elements[7].Type == ACPI_TYPE_INTEGER) {
 925             valuebase = 8 + obj->Package.Elements[7].Integer.Value;
 926         }
 927
 928         /* check if this matches our expectations based on limited knowledge */
 929         if (valuebase > 7 && obj->Package.Count > valuebase + 1 &&
 930             obj->Package.Elements[0].Type == ACPI_TYPE_STRING &&
 931             obj->Package.Elements[1].Type == ACPI_TYPE_STRING &&
 932             obj->Package.Elements[2].Type == ACPI_TYPE_STRING &&
 933             obj->Package.Elements[3].Type == ACPI_TYPE_INTEGER &&
 934             obj->Package.Elements[4].Type == ACPI_TYPE_INTEGER &&
 935             obj->Package.Elements[5].Type == ACPI_TYPE_INTEGER &&
 936             obj->Package.Elements[6].Type == ACPI_TYPE_INTEGER &&
 937             obj->Package.Elements[valuebase].Type == ACPI_TYPE_STRING &&
 938             obj->Package.Elements[valuebase+1].Type == ACPI_TYPE_INTEGER &&
 939             obj->Package.Count > valuebase +
 940                 obj->Package.Elements[valuebase+1].Integer.Value
 941            ) {
 942                 enumbase = valuebase + 1;
 943                 if (detail & ACPI_HP_CMI_DETAIL_PATHS) {
 944                         strlcat(outbuf, acpi_hp_get_string_from_object(
 945                                 &obj->Package.Elements[2], string_buffer, size),
 946                                 outsize);
 947                         outlen += 48;
 948                         while (strlen(outbuf) < outlen)
 949                                 strlcat(outbuf, " ", outsize);
 950                 }
 951                 strlcat(outbuf, acpi_hp_get_string_from_object(
 952                                 &obj->Package.Elements[0], string_buffer, size),
 953                                 outsize);
 954                 outlen += 43;
 955                 while (strlen(outbuf) < outlen)
 956                         strlcat(outbuf, " ", outsize);
 957                 strlcat(outbuf, acpi_hp_get_string_from_object(
 958                                 &obj->Package.Elements[valuebase], string_buffer,
 959                                 size),
 960                                 outsize);
 961                 outlen += 21;
 962                 while (strlen(outbuf) < outlen)
 963                         strlcat(outbuf, " ", outsize);
 964                 for (i = 0; i < strlen(outbuf); ++i)
 965                         if (outbuf[i] == '\\')
 966                                 outbuf[i] = '/';
 967                 if (detail & ACPI_HP_CMI_DETAIL_ENUMS) {
 968                         for (i = enumbase + 1; i < enumbase + 1 +
 969                             obj->Package.Elements[enumbase].Integer.Value;
 970                             ++i) {
 971                                 acpi_hp_get_string_from_object(
 972                                     &obj->Package.Elements[i], string_buffer,
 973                                     size);
 974                                 if (strlen(string_buffer) > 1 ||
 975                                     (strlen(string_buffer) == 1 &&
 976                                     string_buffer[0] != ' ')) {
 977                                         if (has_enums)
 978                                                 strlcat(outbuf, "/", outsize);
 979                                         else
 980                                                 strlcat(outbuf, " (", outsize);
 981                                         strlcat(outbuf, string_buffer, outsize);
 982                                         has_enums = 1;
 983                                 }
 984                         }
 985                 }
 986                 if (has_enums)
 987                         strlcat(outbuf, ")", outsize);
 988                 if (detail & ACPI_HP_CMI_DETAIL_FLAGS) {
 989                         strlcat(outbuf, obj->Package.Elements[3].Integer.Value?
 990                             " [ReadOnly]":"", outsize);
 991                         strlcat(outbuf, obj->Package.Elements[4].Integer.Value?
 992                             "":" [NOUI]", outsize);
 993                         strlcat(outbuf, obj->Package.Elements[5].Integer.Value?
 994                             " [RPP]":"", outsize);
 995                 }
 996                 *sequence = (UINT32) obj->Package.Elements[6].Integer.Value;
 997         }
 998         acpi_hp_free_buffer(&out);
 999
1000         return (0);
1001 }
1002
1003
1004
1005 /*
1006  * Convert given two digit hex string (hexin) to an UINT8 referenced
1007  * by byteout.
1008  * Return != 0 if the was a problem (invalid input)
1009  */
1010 static __inline int acpi_hp_hex_to_int(const UINT8 *hexin, UINT8 *byteout)
1011 {
1012         unsigned int    hi;
1013         unsigned int    lo;
1014
1015         hi = hexin[0];
1016         lo = hexin[1];
1017         if ('0' <= hi && hi <= '9')
1018                 hi -= '0';
1019         else if ('A' <= hi && hi <= 'F')
1020                 hi -= ('A' - 10);
1021         else if ('a' <= hi && hi <= 'f')
1022                 hi -= ('a' - 10);
1023         else
1024                 return (1);
1025         if ('0' <= lo && lo <= '9')
1026                 lo -= '0';
1027         else if ('A' <= lo && lo <= 'F')
1028                 lo -= ('A' - 10);
1029         else if ('a' <= lo && lo <= 'f')
1030                 lo -= ('a' - 10);
1031         else
1032                 return (1);
1033         *byteout = (hi << 4) + lo;
1034
1035         return (0);
1036 }
1037
1038
1039 static void
1040 acpi_hp_hex_decode(char* buffer)
1041 {
1042         int     i;
1043         int     length = strlen(buffer);
1044         UINT8   *uin;
1045         UINT8   uout;
1046
1047         if (((int)length/2)*2 == length || length < 10) return;
1048
1049         for (i = 0; i<length; ++i) {
1050                 if (!((i+1)%3)) {
1051                         if (buffer[i] != ' ')
1052                                 return;
1053                 }
1054                 else
1055                         if (!((buffer[i] >= '0' && buffer[i] <= '9') ||
1056                             (buffer[i] >= 'A' && buffer[i] <= 'F')))
1057                                 return;
1058         }
1059
1060         for (i = 0; i<length; i += 3) {
1061                 uin = &buffer[i];
1062                 uout = 0;
1063                 acpi_hp_hex_to_int(uin, &uout);
1064                 buffer[i/3] = (char) uout;
1065         }
1066         buffer[(length+1)/3] = 0;
1067 }
1068
1069
1070 /*
1071  * open hpcmi device
1072  */
1073 static int
1074 acpi_hp_hpcmi_open(struct dev_open_args *ap)
1075 {
1076         struct acpi_hp_softc    *sc;
1077         int                     ret;
1078         struct cdev *dev = ap->a_head.a_dev;
1079         struct thread *td = curthread;
1080
1081         if (dev == NULL || dev->si_drv1 == NULL)
1082                 return (EBADF);
1083         sc = dev->si_drv1;
1084
1085         ACPI_SERIAL_BEGIN(hp);
1086         if (sc->hpcmi_open_pid != 0) {
1087                 ret = EBUSY;
1088         }
1089         else {
1090                 if (sbuf_new(&sc->hpcmi_sbuf, NULL, 4096, SBUF_AUTOEXTEND)
1091                     == NULL) {
1092                         ret = ENXIO;
1093                 } else {
1094                         sc->hpcmi_open_pid = td->td_proc->p_pid;
1095                         sc->hpcmi_bufptr = 0;
1096                         ret = 0;
1097                 }
1098         }
1099         ACPI_SERIAL_END(hp);
1100
1101         return (ret);
1102 }
1103
1104 /*
1105  * close hpcmi device
1106  */
1107 static int
1108 acpi_hp_hpcmi_close(struct dev_close_args *ap)
1109 {
1110         struct acpi_hp_softc    *sc;
1111         int                     ret;
1112         struct cdev *dev = ap->a_head.a_dev;
1113
1114         if (dev == NULL || dev->si_drv1 == NULL)
1115                 return (EBADF);
1116         sc = dev->si_drv1;
1117
1118         ACPI_SERIAL_BEGIN(hp);
1119         if (sc->hpcmi_open_pid == 0) {
1120                 ret = EBADF;
1121         }
1122         else {
1123                 if (sc->hpcmi_bufptr != -1) {
1124                         sbuf_delete(&sc->hpcmi_sbuf);
1125                         sc->hpcmi_bufptr = -1;
1126                 }
1127                 sc->hpcmi_open_pid = 0;
1128                 ret = 0;
1129         }
1130         ACPI_SERIAL_END(hp);
1131
1132         return (ret);
1133 }
1134
1135 /*
1136  * Read from hpcmi bios information
1137  */
1138 static int
1139 acpi_hp_hpcmi_read(struct dev_read_args *ap)
1140 {
1141         struct acpi_hp_softc    *sc;
1142         int                     pos, i, l, ret;
1143         UINT8                   instance;
1144         UINT8                   maxInstance;
1145         UINT32                  sequence;
1146         int                     linesize = 1025;
1147         char                    line[linesize];
1148         struct cdev *dev = ap->a_head.a_dev;
1149         struct uio *buf = ap->a_uio;
1150
1151         if (dev == NULL || dev->si_drv1 == NULL)
1152                 return (EBADF);
1153         sc = dev->si_drv1;
1154
1155         ACPI_SERIAL_BEGIN(hp);
1156         if (sc->hpcmi_open_pid != buf->uio_td->td_proc->p_pid
1157             || sc->hpcmi_bufptr == -1) {
1158                 ret = EBADF;
1159         }
1160         else {
1161                 if (!sbuf_done(&sc->hpcmi_sbuf)) {
1162                         if (sc->cmi_order_size < 0) {
1163                                 maxInstance = sc->has_cmi;
1164                                 if (!(sc->cmi_detail &
1165                                     ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) &&
1166                                     maxInstance > 0) {
1167                                         maxInstance--;
1168                                 }
1169                                 sc->cmi_order_size = 0;
1170                                 for (instance = 0; instance < maxInstance;
1171                                     ++instance) {
1172                                         if (acpi_hp_get_cmi_block(sc->wmi_dev,
1173                                                 ACPI_HP_WMI_CMI_GUID, instance,
1174                                                 line, linesize, &sequence,
1175                                                 sc->cmi_detail)) {
1176                                                 instance = maxInstance;
1177                                         }
1178                                         else {
1179                                                 pos = sc->cmi_order_size;
1180                                                 for (i=0;
1181                                                   i<sc->cmi_order_size && i<127;
1182                                                      ++i) {
1183                                 if (sc->cmi_order[i].sequence > sequence) {
1184                                                                 pos = i;
1185                                                                 break;
1186                                                         }
1187                                                 }
1188                                                 for (i=sc->cmi_order_size;
1189                                                     i>pos;
1190                                                     --i) {
1191                                                 sc->cmi_order[i].sequence =
1192                                                     sc->cmi_order[i-1].sequence;
1193                                                 sc->cmi_order[i].instance =
1194                                                     sc->cmi_order[i-1].instance;
1195                                                 }
1196                                                 sc->cmi_order[pos].sequence =
1197                                                     sequence;
1198                                                 sc->cmi_order[pos].instance =
1199                                                     instance;
1200                                                 sc->cmi_order_size++;
1201                                         }
1202                                 }
1203                         }
1204                         for (i=0; i<sc->cmi_order_size; ++i) {
1205                                 if (!acpi_hp_get_cmi_block(sc->wmi_dev,
1206                                     ACPI_HP_WMI_CMI_GUID,
1207                                     sc->cmi_order[i].instance, line, linesize,
1208                                     &sequence, sc->cmi_detail)) {
1209                                         sbuf_printf(&sc->hpcmi_sbuf, "%s\n", line);
1210                                 }
1211                         }
1212                         sbuf_finish(&sc->hpcmi_sbuf);
1213                 }
1214                 if (sbuf_len(&sc->hpcmi_sbuf) <= 0) {
1215                         sbuf_delete(&sc->hpcmi_sbuf);
1216                         sc->hpcmi_bufptr = -1;
1217                         sc->hpcmi_open_pid = 0;
1218                         ret = ENOMEM;
1219                 } else {
1220                         l = min(buf->uio_resid, sbuf_len(&sc->hpcmi_sbuf) -
1221                             sc->hpcmi_bufptr);
1222                         ret = (l > 0)?uiomove(sbuf_data(&sc->hpcmi_sbuf) +
1223                             sc->hpcmi_bufptr, l, buf) : 0;
1224                         sc->hpcmi_bufptr += l;
1225                 }
1226         }
1227         ACPI_SERIAL_END(hp);
1228
1229         return (ret);
1230 }