sys/dev/acpi_support/acpi_hp.c

   1 /*-
   2  * Copyright (c) 2009 Michael Gmelin <freebsd@grem.de>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 /*
  31  * Driver for extra ACPI-controlled features found on HP laptops
  32  * that use a WMI enabled BIOS (e.g. HP Compaq 8510p and 6510p).
  33  * Allows to control and read status of integrated hardware and read
  34  * BIOS settings through CMI.
  35  * Inspired by the hp-wmi driver, which implements a subset of these
  36  * features (hotkeys) on Linux.
  37  *
  38  * HP CMI whitepaper:
  39  *     http://h20331.www2.hp.com/Hpsub/downloads/cmi_whitepaper.pdf
  40  * wmi-hp for Linux:
  41  *     http://www.kernel.org
  42  * WMI and ACPI:
  43  *     http://www.microsoft.com/whdc/system/pnppwr/wmi/wmi-acpi.mspx
  44  */
  45
  46 #include "opt_acpi.h"
  47 #include <sys/param.h>
  48 #include <sys/conf.h>
  49 #include <sys/uio.h>
  50 #include <sys/proc.h>
  51 #include <sys/kernel.h>
  52 #include <sys/bus.h>
  53 #include <sys/sbuf.h>
  54 #include <sys/module.h>
  55 #include <sys/sysctl.h>
  56
  57 #include <contrib/dev/acpica/include/acpi.h>
  58 #include <contrib/dev/acpica/include/accommon.h>
  59 #include <dev/acpica/acpivar.h>
  60 #include "acpi_wmi_if.h"
  61
  62 #define _COMPONENT      ACPI_OEM
  63 ACPI_MODULE_NAME("HP")
  64
  65 #define ACPI_HP_WMI_EVENT_GUID          "95F24279-4D7B-4334-9387-ACCDC67EF61C"
  66 #define ACPI_HP_WMI_BIOS_GUID           "5FB7F034-2C63-45E9-BE91-3D44E2C707E4"
  67 #define ACPI_HP_WMI_CMI_GUID            "2D114B49-2DFB-4130-B8FE-4A3C09E75133"
  68
  69 #define ACPI_HP_WMI_DISPLAY_COMMAND     0x1
  70 #define ACPI_HP_WMI_HDDTEMP_COMMAND     0x2
  71 #define ACPI_HP_WMI_ALS_COMMAND         0x3
  72 #define ACPI_HP_WMI_DOCK_COMMAND        0x4
  73 #define ACPI_HP_WMI_WIRELESS_COMMAND    0x5
  74
  75 #define ACPI_HP_METHOD_WLAN_ENABLED                     1
  76 #define ACPI_HP_METHOD_WLAN_RADIO                       2
  77 #define ACPI_HP_METHOD_WLAN_ON_AIR                      3
  78 #define ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON          4
  79 #define ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF        5
  80 #define ACPI_HP_METHOD_BLUETOOTH_ENABLED                6
  81 #define ACPI_HP_METHOD_BLUETOOTH_RADIO                  7
  82 #define ACPI_HP_METHOD_BLUETOOTH_ON_AIR                 8
  83 #define ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON     9
  84 #define ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF   10
  85 #define ACPI_HP_METHOD_WWAN_ENABLED                     11
  86 #define ACPI_HP_METHOD_WWAN_RADIO                       12
  87 #define ACPI_HP_METHOD_WWAN_ON_AIR                      13
  88 #define ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON          14
  89 #define ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF        15
  90 #define ACPI_HP_METHOD_ALS                              16
  91 #define ACPI_HP_METHOD_DISPLAY                          17
  92 #define ACPI_HP_METHOD_HDDTEMP                          18
  93 #define ACPI_HP_METHOD_DOCK                             19
  94 #define ACPI_HP_METHOD_CMI_DETAIL                       20
  95 #define ACPI_HP_METHOD_VERBOSE                          21
  96
  97 #define HP_MASK_WWAN_ON_AIR                     0x1000000
  98 #define HP_MASK_BLUETOOTH_ON_AIR                0x10000
  99 #define HP_MASK_WLAN_ON_AIR                     0x100
 100 #define HP_MASK_WWAN_RADIO                      0x8000000
 101 #define HP_MASK_BLUETOOTH_RADIO                 0x80000
 102 #define HP_MASK_WLAN_RADIO                      0x800
 103 #define HP_MASK_WWAN_ENABLED                    0x2000000
 104 #define HP_MASK_BLUETOOTH_ENABLED               0x20000
 105 #define HP_MASK_WLAN_ENABLED                    0x200
 106
 107 #define ACPI_HP_CMI_DETAIL_PATHS                0x01
 108 #define ACPI_HP_CMI_DETAIL_ENUMS                0x02
 109 #define ACPI_HP_CMI_DETAIL_FLAGS                0x04
 110 #define ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE    0x08
 111
 112 struct acpi_hp_inst_seq_pair {
 113         UINT32  sequence;       /* sequence number as suggested by cmi bios */
 114         UINT8   instance;       /* object instance on guid */
 115 };
 116
 117 struct acpi_hp_softc {
 118         device_t        dev;
 119         device_t        wmi_dev;
 120         int             has_notify;             /* notification GUID found */
 121         int             has_cmi;                /* CMI GUID found */
 122         int             cmi_detail;             /* CMI detail level
 123                                                    (set by sysctl) */
 124         int             verbose;                /* add debug output */
 125         int             wlan_enable_if_radio_on;        /* set by sysctl */
 126         int             wlan_disable_if_radio_off;      /* set by sysctl */
 127         int             bluetooth_enable_if_radio_on;   /* set by sysctl */
 128         int             bluetooth_disable_if_radio_off; /* set by sysctl */
 129         int             wwan_enable_if_radio_on;        /* set by sysctl */
 130         int             wwan_disable_if_radio_off;      /* set by sysctl */
 131         int             was_wlan_on_air;                /* last known WLAN
 132                                                            on air status */
 133         int             was_bluetooth_on_air;           /* last known BT
 134                                                            on air status */
 135         int             was_wwan_on_air;                /* last known WWAN
 136                                                            on air status */
 137         struct sysctl_ctx_list  *sysctl_ctx;
 138         struct sysctl_oid       *sysctl_tree;
 139         struct cdev     *hpcmi_dev_t;           /* hpcmi device handle */
 140         struct sbuf     hpcmi_sbuf;             /* /dev/hpcmi output sbuf */
 141         pid_t           hpcmi_open_pid;         /* pid operating on
 142                                                    /dev/hpcmi */
 143         int             hpcmi_bufptr;           /* current pointer position
 144                                                    in /dev/hpcmi output buffer
 145                                                  */
 146         int             cmi_order_size;         /* size of cmi_order list */
 147         struct acpi_hp_inst_seq_pair cmi_order[128];    /* list of CMI
 148                              instances ordered by BIOS suggested sequence */
 149 };
 150
 151 static struct {
 152         char    *name;
 153         int     method;
 154         char    *description;
 155         int     access;
 156 } acpi_hp_sysctls[] = {
 157         {
 158                 .name           = "wlan_enabled",
 159                 .method         = ACPI_HP_METHOD_WLAN_ENABLED,
 160                 .description    = "Enable/Disable WLAN (WiFi)",
 161                 .access         = CTLTYPE_INT | CTLFLAG_RW
 162         },
 163         {
 164                 .name           = "wlan_radio",
 165                 .method         = ACPI_HP_METHOD_WLAN_RADIO,
 166                 .description    = "WLAN radio status",
 167                 .access         = CTLTYPE_INT | CTLFLAG_RD
 168         },
 169         {
 170                 .name           = "wlan_on_air",
 171                 .method         = ACPI_HP_METHOD_WLAN_ON_AIR,
 172                 .description    = "WLAN radio ready to use (enabled and radio)",
 173                 .access         = CTLTYPE_INT | CTLFLAG_RD
 174         },
 175         {
 176                 .name           = "wlan_enable_if_radio_on",
 177                 .method         = ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON,
 178                 .description    = "Enable WLAN if radio is turned on",
 179                 .access         = CTLTYPE_INT | CTLFLAG_RW
 180         },
 181         {
 182                 .name           = "wlan_disable_if_radio_off",
 183                 .method         = ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF,
 184                 .description    = "Disable WLAN if radio is turned off",
 185                 .access         = CTLTYPE_INT | CTLFLAG_RW
 186         },
 187         {
 188                 .name           = "bt_enabled",
 189                 .method         = ACPI_HP_METHOD_BLUETOOTH_ENABLED,
 190                 .description    = "Enable/Disable Bluetooth",
 191                 .access         = CTLTYPE_INT | CTLFLAG_RW
 192         },
 193         {
 194                 .name           = "bt_radio",
 195                 .method         = ACPI_HP_METHOD_BLUETOOTH_RADIO,
 196                 .description    = "Bluetooth radio status",
 197                 .access         = CTLTYPE_INT | CTLFLAG_RD
 198         },
 199         {
 200                 .name           = "bt_on_air",
 201                 .method         = ACPI_HP_METHOD_BLUETOOTH_ON_AIR,
 202                 .description    = "Bluetooth radio ready to use"
 203                                     " (enabled and radio)",
 204                 .access         = CTLTYPE_INT | CTLFLAG_RD
 205         },
 206         {
 207                 .name           = "bt_enable_if_radio_on",
 208                 .method         = ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON,
 209                 .description    = "Enable bluetooth if radio is turned on",
 210                 .access         = CTLTYPE_INT | CTLFLAG_RW
 211         },
 212         {
 213                 .name           = "bt_disable_if_radio_off",
 214                 .method         = ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF,
 215                 .description    = "Disable bluetooth if radio is turned off",
 216                 .access         = CTLTYPE_INT | CTLFLAG_RW
 217         },
 218         {
 219                 .name           = "wwan_enabled",
 220                 .method         = ACPI_HP_METHOD_WWAN_ENABLED,
 221                 .description    = "Enable/Disable WWAN (UMTS)",
 222                 .access         = CTLTYPE_INT | CTLFLAG_RW
 223         },
 224         {
 225                 .name           = "wwan_radio",
 226                 .method         = ACPI_HP_METHOD_WWAN_RADIO,
 227                 .description    = "WWAN radio status",
 228                 .access         = CTLTYPE_INT | CTLFLAG_RD
 229         },
 230         {
 231                 .name           = "wwan_on_air",
 232                 .method         = ACPI_HP_METHOD_WWAN_ON_AIR,
 233                 .description    = "WWAN radio ready to use (enabled and radio)",
 234                 .access         = CTLTYPE_INT | CTLFLAG_RD
 235         },
 236         {
 237                 .name           = "wwan_enable_if_radio_on",
 238                 .method         = ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON,
 239                 .description    = "Enable WWAN if radio is turned on",
 240                 .access         = CTLTYPE_INT | CTLFLAG_RW
 241         },
 242         {
 243                 .name           = "wwan_disable_if_radio_off",
 244                 .method         = ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF,
 245                 .description    = "Disable WWAN if radio is turned off",
 246                 .access         = CTLTYPE_INT | CTLFLAG_RW
 247         },
 248         {
 249                 .name           = "als_enabled",
 250                 .method         = ACPI_HP_METHOD_ALS,
 251                 .description    = "Enable/Disable ALS (Ambient light sensor)",
 252                 .access         = CTLTYPE_INT | CTLFLAG_RW
 253         },
 254         {
 255                 .name           = "display",
 256                 .method         = ACPI_HP_METHOD_DISPLAY,
 257                 .description    = "Display status",
 258                 .access         = CTLTYPE_INT | CTLFLAG_RD
 259         },
 260         {
 261                 .name           = "hdd_temperature",
 262                 .method         = ACPI_HP_METHOD_HDDTEMP,
 263                 .description    = "HDD temperature",
 264                 .access         = CTLTYPE_INT | CTLFLAG_RD
 265         },
 266         {
 267                 .name           = "is_docked",
 268                 .method         = ACPI_HP_METHOD_DOCK,
 269                 .description    = "Docking station status",
 270                 .access         = CTLTYPE_INT | CTLFLAG_RD
 271         },
 272         {
 273                 .name           = "cmi_detail",
 274                 .method         = ACPI_HP_METHOD_CMI_DETAIL,
 275                 .description    = "Details shown in CMI output "
 276                                     "(cat /dev/hpcmi)",
 277                 .access         = CTLTYPE_INT | CTLFLAG_RW
 278         },
 279         {
 280                 .name           = "verbose",
 281                 .method         = ACPI_HP_METHOD_VERBOSE,
 282                 .description    = "Verbosity level",
 283                 .access         = CTLTYPE_INT | CTLFLAG_RW
 284         },
 285
 286         { NULL, 0, NULL, 0 }
 287 };
 288
 289 ACPI_SERIAL_DECL(hp, "HP ACPI-WMI Mapping");
 290
 291 static void     acpi_hp_identify(driver_t *driver, device_t parent);
 292 static int      acpi_hp_probe(device_t dev);
 293 static int      acpi_hp_attach(device_t dev);
 294 static int      acpi_hp_detach(device_t dev);
 295
 296 static void     acpi_hp_evaluate_auto_on_off(struct acpi_hp_softc* sc);
 297 static int      acpi_hp_sysctl(SYSCTL_HANDLER_ARGS);
 298 static int      acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method,
 299                     int arg, int oldarg);
 300 static int      acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method);
 301 static int      acpi_hp_exec_wmi_command(device_t wmi_dev, int command,
 302                     int is_write, int val);
 303 static void     acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context);
 304 static int      acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid,
 305                     UINT8 instance, char* outbuf, size_t outsize,
 306                     UINT32* sequence, int detail);
 307 static void     acpi_hp_hex_decode(char* buffer);
 308
 309 static d_open_t acpi_hp_hpcmi_open;
 310 static d_close_t acpi_hp_hpcmi_close;
 311 static d_read_t acpi_hp_hpcmi_read;
 312
 313 /* handler /dev/hpcmi device */
 314 static struct cdevsw hpcmi_cdevsw = {
 315         .d_version = D_VERSION,
 316         .d_open = acpi_hp_hpcmi_open,
 317         .d_close = acpi_hp_hpcmi_close,
 318         .d_read = acpi_hp_hpcmi_read,
 319         .d_name = "hpcmi",
 320 };
 321
 322 static device_method_t acpi_hp_methods[] = {
 323         DEVMETHOD(device_identify, acpi_hp_identify),
 324         DEVMETHOD(device_probe, acpi_hp_probe),
 325         DEVMETHOD(device_attach, acpi_hp_attach),
 326         DEVMETHOD(device_detach, acpi_hp_detach),
 327         {0, 0}
 328 };
 329
 330 static driver_t acpi_hp_driver = {
 331         "acpi_hp",
 332         acpi_hp_methods,
 333         sizeof(struct acpi_hp_softc),
 334 };
 335
 336 static devclass_t acpi_hp_devclass;
 337
 338 DRIVER_MODULE(acpi_hp, acpi_wmi, acpi_hp_driver, acpi_hp_devclass,
 339                 0, 0);
 340 MODULE_DEPEND(acpi_hp, acpi_wmi, 1, 1, 1);
 341 MODULE_DEPEND(acpi_hp, acpi, 1, 1, 1);
 342
 343 static void
 344 acpi_hp_evaluate_auto_on_off(struct acpi_hp_softc *sc)
 345 {
 346         int     wireless;
 347         int     new_wlan_status;
 348         int     new_bluetooth_status;
 349         int     new_wwan_status;
 350
 351         wireless = acpi_hp_exec_wmi_command(sc->wmi_dev,
 352                     ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 353         new_wlan_status = -1;
 354         new_bluetooth_status = -1;
 355         new_wwan_status = -1;
 356
 357         if (sc->verbose)
 358                 device_printf(sc->wmi_dev, "Wireless status is %x\n", wireless);
 359         if (sc->wlan_disable_if_radio_off && !(wireless & HP_MASK_WLAN_RADIO)
 360             &&  (wireless & HP_MASK_WLAN_ENABLED)) {
 361                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 362                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x100);
 363                 new_wlan_status = 0;
 364         }
 365         else if (sc->wlan_enable_if_radio_on && (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, 0x101);
 369                 new_wlan_status = 1;
 370         }
 371         if (sc->bluetooth_disable_if_radio_off &&
 372             !(wireless & HP_MASK_BLUETOOTH_RADIO) &&
 373             (wireless & HP_MASK_BLUETOOTH_ENABLED)) {
 374                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 375                     ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x200);
 376                 new_bluetooth_status = 0;
 377         }
 378         else if (sc->bluetooth_enable_if_radio_on &&
 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, 0x202);
 383                 new_bluetooth_status = 1;
 384         }
 385         if (sc->wwan_disable_if_radio_off &&
 386             !(wireless & HP_MASK_WWAN_RADIO) &&
 387             (wireless & HP_MASK_WWAN_ENABLED)) {
 388                 acpi_hp_exec_wmi_command(sc->wmi_dev,
 389                 ACPI_HP_WMI_WIRELESS_COMMAND, 1, 0x400);
 390                 new_wwan_status = 0;
 391         }
 392         else if (sc->wwan_enable_if_radio_on &&
 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, 0x404);
 397                 new_wwan_status = 1;
 398         }
 399
 400         if (new_wlan_status == -1) {
 401                 new_wlan_status = (wireless & HP_MASK_WLAN_ON_AIR);
 402                 if ((new_wlan_status?1:0) != sc->was_wlan_on_air) {
 403                         sc->was_wlan_on_air = sc->was_wlan_on_air?0:1;
 404                         if (sc->verbose)
 405                                 device_printf(sc->wmi_dev,
 406                                     "WLAN on air changed to %i "
 407                                     "(new_wlan_status is %i)\n",
 408                                     sc->was_wlan_on_air, new_wlan_status);
 409                         acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
 410                             0xc0+sc->was_wlan_on_air);
 411                 }
 412         }
 413         if (new_bluetooth_status == -1) {
 414                 new_bluetooth_status = (wireless & HP_MASK_BLUETOOTH_ON_AIR);
 415                 if ((new_bluetooth_status?1:0) != sc->was_bluetooth_on_air) {
 416                         sc->was_bluetooth_on_air = sc->was_bluetooth_on_air?
 417                             0:1;
 418                         if (sc->verbose)
 419                                 device_printf(sc->wmi_dev,
 420                                     "BLUETOOTH on air changed"
 421                                     " to %i (new_bluetooth_status is %i)\n",
 422                                     sc->was_bluetooth_on_air,
 423                                     new_bluetooth_status);
 424                         acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
 425                             0xd0+sc->was_bluetooth_on_air);
 426                 }
 427         }
 428         if (new_wwan_status == -1) {
 429                 new_wwan_status = (wireless & HP_MASK_WWAN_ON_AIR);
 430                 if ((new_wwan_status?1:0) != sc->was_wwan_on_air) {
 431                         sc->was_wwan_on_air = sc->was_wwan_on_air?0:1;
 432                         if (sc->verbose)
 433                                 device_printf(sc->wmi_dev,
 434                                     "WWAN on air changed to %i"
 435                                     " (new_wwan_status is %i)\n",
 436                                     sc->was_wwan_on_air, new_wwan_status);
 437                         acpi_UserNotify("HP", ACPI_ROOT_OBJECT,
 438                             0xe0+sc->was_wwan_on_air);
 439                 }
 440         }
 441 }
 442
 443 static void
 444 acpi_hp_identify(driver_t *driver, device_t parent)
 445 {
 446
 447         /* Don't do anything if driver is disabled. */
 448         if (acpi_disabled("hp"))
 449                 return;
 450
 451         /* Add only a single device instance. */
 452         if (device_find_child(parent, "acpi_hp", -1) != NULL)
 453                 return;
 454
 455         if (BUS_ADD_CHILD(parent, 0, "acpi_hp", -1) == NULL)
 456                 device_printf(parent, "add acpi_hp child failed\n");
 457 }
 458
 459 static int
 460 acpi_hp_probe(device_t dev)
 461 {
 462
 463         device_set_desc(dev, "HP ACPI-WMI Mapping");
 464         return (0);
 465 }
 466
 467 static int
 468 acpi_hp_attach(device_t dev)
 469 {
 470         struct acpi_hp_softc    *sc;
 471         int                     arg;
 472
 473         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 474
 475         sc = device_get_softc(dev);
 476         sc->dev = dev;
 477         sc->has_notify = 0;
 478         sc->has_cmi = 0;
 479         sc->bluetooth_enable_if_radio_on = 0;
 480         sc->bluetooth_disable_if_radio_off = 0;
 481         sc->wlan_enable_if_radio_on = 0;
 482         sc->wlan_disable_if_radio_off = 0;
 483         sc->wlan_enable_if_radio_on = 0;
 484         sc->wlan_disable_if_radio_off = 0;
 485         sc->was_wlan_on_air = 0;
 486         sc->was_bluetooth_on_air = 0;
 487         sc->was_wwan_on_air = 0;
 488         sc->cmi_detail = 0;
 489         sc->cmi_order_size = -1;
 490         sc->verbose = 0;
 491         memset(sc->cmi_order, 0, sizeof(sc->cmi_order));
 492
 493         sc->wmi_dev = device_get_parent(dev);
 494         if (!ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 495             ACPI_HP_WMI_BIOS_GUID)) {
 496                 device_printf(dev,
 497                     "WMI device does not provide the HP BIOS GUID\n");
 498                 return (EINVAL);
 499         }
 500         if (ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 501             ACPI_HP_WMI_EVENT_GUID)) {
 502                 device_printf(dev,
 503                     "HP event GUID detected, installing event handler\n");
 504                 if (ACPI_WMI_INSTALL_EVENT_HANDLER(sc->wmi_dev,
 505                     ACPI_HP_WMI_EVENT_GUID, acpi_hp_notify, dev)) {
 506                         device_printf(dev,
 507                             "Could not install notification handler!\n");
 508                 }
 509                 else {
 510                         sc->has_notify = 1;
 511                 }
 512         }
 513         if ((sc->has_cmi =
 514             ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev, ACPI_HP_WMI_CMI_GUID)
 515             )) {
 516                 device_printf(dev, "HP CMI GUID detected\n");
 517         }
 518
 519         if (sc->has_cmi) {
 520                 sc->hpcmi_dev_t = make_dev(&hpcmi_cdevsw, 0, UID_ROOT,
 521                             GID_WHEEL, 0644, "hpcmi");
 522                 sc->hpcmi_dev_t->si_drv1 = sc;
 523                 sc->hpcmi_open_pid = 0;
 524                 sc->hpcmi_bufptr = -1;
 525         }
 526
 527         ACPI_SERIAL_BEGIN(hp);
 528
 529         sc->sysctl_ctx = device_get_sysctl_ctx(dev);
 530         sc->sysctl_tree = device_get_sysctl_tree(dev);
 531         for (int i = 0; acpi_hp_sysctls[i].name != NULL; ++i) {
 532                 arg = 0;
 533                 if ((!sc->has_notify &&
 534                     (acpi_hp_sysctls[i].method ==
 535                         ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON ||
 536                     acpi_hp_sysctls[i].method ==
 537                         ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF ||
 538                     acpi_hp_sysctls[i].method ==
 539                         ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON ||
 540                     acpi_hp_sysctls[i].method ==
 541                         ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF ||
 542                     acpi_hp_sysctls[i].method ==
 543                         ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON ||
 544                     acpi_hp_sysctls[i].method ==
 545                         ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF)) ||
 546                     (arg = acpi_hp_sysctl_get(sc,
 547                     acpi_hp_sysctls[i].method)) < 0) {
 548                         continue;
 549                 }
 550                 if (acpi_hp_sysctls[i].method == ACPI_HP_METHOD_WLAN_ON_AIR) {
 551                         sc->was_wlan_on_air = arg;
 552                 }
 553                 else if (acpi_hp_sysctls[i].method ==
 554                             ACPI_HP_METHOD_BLUETOOTH_ON_AIR) {
 555                         sc->was_bluetooth_on_air = arg;
 556                 }
 557                 else if (acpi_hp_sysctls[i].method ==
 558                             ACPI_HP_METHOD_WWAN_ON_AIR) {
 559                         sc->was_wwan_on_air = arg;
 560                 }
 561
 562                 SYSCTL_ADD_PROC(sc->sysctl_ctx,
 563                 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
 564                         acpi_hp_sysctls[i].name, acpi_hp_sysctls[i].access,
 565                         sc, i, acpi_hp_sysctl, "I",
 566                         acpi_hp_sysctls[i].description);
 567         }
 568         ACPI_SERIAL_END(hp);
 569
 570         return (0);
 571 }
 572
 573 static int
 574 acpi_hp_detach(device_t dev)
 575 {
 576         int     ret;
 577
 578         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 579         struct acpi_hp_softc *sc = device_get_softc(dev);
 580         if (sc->has_cmi && sc->hpcmi_open_pid != 0) {
 581                 ret = EBUSY;
 582         }
 583         else {
 584                 if (sc->has_notify) {
 585                         ACPI_WMI_REMOVE_EVENT_HANDLER(dev,
 586                             ACPI_HP_WMI_EVENT_GUID);
 587                 }
 588                 if (sc->hpcmi_bufptr != -1) {
 589                         sbuf_delete(&sc->hpcmi_sbuf);
 590                         sc->hpcmi_bufptr = -1;
 591                 }
 592                 sc->hpcmi_open_pid = 0;
 593                 destroy_dev(sc->hpcmi_dev_t);
 594                 ret = 0;
 595         }
 596
 597         return (ret);
 598 }
 599
 600 static int
 601 acpi_hp_sysctl(SYSCTL_HANDLER_ARGS)
 602 {
 603         struct acpi_hp_softc    *sc;
 604         int                     arg;
 605         int                     oldarg;
 606         int                     error = 0;
 607         int                     function;
 608         int                     method;
 609
 610         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 611
 612         sc = (struct acpi_hp_softc *)oidp->oid_arg1;
 613         function = oidp->oid_arg2;
 614         method = acpi_hp_sysctls[function].method;
 615
 616         ACPI_SERIAL_BEGIN(hp);
 617         arg = acpi_hp_sysctl_get(sc, method);
 618         oldarg = arg;
 619         error = sysctl_handle_int(oidp, &arg, 0, req);
 620         if (!error && req->newptr != NULL) {
 621                 error = acpi_hp_sysctl_set(sc, method, arg, oldarg);
 622         }
 623         ACPI_SERIAL_END(hp);
 624
 625         return (error);
 626 }
 627
 628 static int
 629 acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method)
 630 {
 631         int     val = 0;
 632
 633         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 634         ACPI_SERIAL_ASSERT(hp);
 635
 636         switch (method) {
 637         case ACPI_HP_METHOD_WLAN_ENABLED:
 638                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 639                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 640                 val = ((val & HP_MASK_WLAN_ENABLED) != 0);
 641                 break;
 642         case ACPI_HP_METHOD_WLAN_RADIO:
 643                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 644                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 645                 val = ((val & HP_MASK_WLAN_RADIO) != 0);
 646                 break;
 647         case ACPI_HP_METHOD_WLAN_ON_AIR:
 648                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 649                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 650                 val = ((val & HP_MASK_WLAN_ON_AIR) != 0);
 651                 break;
 652         case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 653                 val = sc->wlan_enable_if_radio_on;
 654                 break;
 655         case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 656                 val = sc->wlan_disable_if_radio_off;
 657                 break;
 658         case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 659                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 660                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 661                 val = ((val & HP_MASK_BLUETOOTH_ENABLED) != 0);
 662                 break;
 663         case ACPI_HP_METHOD_BLUETOOTH_RADIO:
 664                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 665                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 666                 val = ((val & HP_MASK_BLUETOOTH_RADIO) != 0);
 667                 break;
 668         case ACPI_HP_METHOD_BLUETOOTH_ON_AIR:
 669                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 670                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 671                 val = ((val & HP_MASK_BLUETOOTH_ON_AIR) != 0);
 672                 break;
 673         case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 674                 val = sc->bluetooth_enable_if_radio_on;
 675                 break;
 676         case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 677                 val = sc->bluetooth_disable_if_radio_off;
 678                 break;
 679         case ACPI_HP_METHOD_WWAN_ENABLED:
 680                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 681                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 682                 val = ((val & HP_MASK_WWAN_ENABLED) != 0);
 683                 break;
 684         case ACPI_HP_METHOD_WWAN_RADIO:
 685                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 686                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 687                 val = ((val & HP_MASK_WWAN_RADIO) != 0);
 688                 break;
 689         case ACPI_HP_METHOD_WWAN_ON_AIR:
 690                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 691                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 692                 val = ((val & HP_MASK_WWAN_ON_AIR) != 0);
 693                 break;
 694         case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 695                 val = sc->wwan_enable_if_radio_on;
 696                 break;
 697         case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 698                 val = sc->wwan_disable_if_radio_off;
 699                 break;
 700         case ACPI_HP_METHOD_ALS:
 701                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 702                         ACPI_HP_WMI_ALS_COMMAND, 0, 0);
 703                 break;
 704         case ACPI_HP_METHOD_DISPLAY:
 705                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 706                         ACPI_HP_WMI_DISPLAY_COMMAND, 0, 0);
 707                 break;
 708         case ACPI_HP_METHOD_HDDTEMP:
 709                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 710                         ACPI_HP_WMI_HDDTEMP_COMMAND, 0, 0);
 711                 break;
 712         case ACPI_HP_METHOD_DOCK:
 713                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 714                         ACPI_HP_WMI_DOCK_COMMAND, 0, 0);
 715                 break;
 716         case ACPI_HP_METHOD_CMI_DETAIL:
 717                 val = sc->cmi_detail;
 718                 break;
 719         case ACPI_HP_METHOD_VERBOSE:
 720                 val = sc->verbose;
 721                 break;
 722         }
 723
 724         return (val);
 725 }
 726
 727 static int
 728 acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method, int arg, int oldarg)
 729 {
 730         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 731         ACPI_SERIAL_ASSERT(hp);
 732
 733         if (method != ACPI_HP_METHOD_CMI_DETAIL &&
 734             method != ACPI_HP_METHOD_VERBOSE)
 735                 arg = arg?1:0;
 736
 737         if (arg != oldarg) {
 738                 switch (method) {
 739                 case ACPI_HP_METHOD_WLAN_ENABLED:
 740                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 741                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 742                                     arg?0x101:0x100));
 743                 case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 744                         sc->wlan_enable_if_radio_on = arg;
 745                         acpi_hp_evaluate_auto_on_off(sc);
 746                         break;
 747                 case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 748                         sc->wlan_disable_if_radio_off = arg;
 749                         acpi_hp_evaluate_auto_on_off(sc);
 750                         break;
 751                 case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 752                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 753                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 754                                     arg?0x202:0x200));
 755                 case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 756                         sc->bluetooth_enable_if_radio_on = arg;
 757                         acpi_hp_evaluate_auto_on_off(sc);
 758                         break;
 759                 case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 760                         sc->bluetooth_disable_if_radio_off = arg?1:0;
 761                         acpi_hp_evaluate_auto_on_off(sc);
 762                         break;
 763                 case ACPI_HP_METHOD_WWAN_ENABLED:
 764                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 765                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 766                                     arg?0x404:0x400));
 767                 case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 768                         sc->wwan_enable_if_radio_on = arg?1:0;
 769                         acpi_hp_evaluate_auto_on_off(sc);
 770                         break;
 771                 case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 772                         sc->wwan_disable_if_radio_off = arg?1:0;
 773                         acpi_hp_evaluate_auto_on_off(sc);
 774                         break;
 775                 case ACPI_HP_METHOD_ALS:
 776                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 777                                     ACPI_HP_WMI_ALS_COMMAND, 1,
 778                                     arg?1:0));
 779                 case ACPI_HP_METHOD_CMI_DETAIL:
 780                         sc->cmi_detail = arg;
 781                         if ((arg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) !=
 782                             (oldarg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE)) {
 783                             sc->cmi_order_size = -1;
 784                         }
 785                         break;
 786                 case ACPI_HP_METHOD_VERBOSE:
 787                         sc->verbose = arg;
 788                         break;
 789                 }
 790         }
 791
 792         return (0);
 793 }
 794
 795 static __inline void
 796 acpi_hp_free_buffer(ACPI_BUFFER* buf) {
 797         if (buf && buf->Pointer) {
 798                 AcpiOsFree(buf->Pointer);
 799         }
 800 }
 801
 802 static void
 803 acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context)
 804 {
 805         device_t dev = context;
 806         ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
 807
 808         struct acpi_hp_softc *sc = device_get_softc(dev);
 809         ACPI_BUFFER response = { ACPI_ALLOCATE_BUFFER, NULL };
 810         ACPI_OBJECT *obj;
 811         ACPI_WMI_GET_EVENT_DATA(sc->wmi_dev, notify, &response);
 812         obj = (ACPI_OBJECT*) response.Pointer;
 813         if (obj && obj->Type == ACPI_TYPE_BUFFER && obj->Buffer.Length == 8) {
 814                 if (*((UINT8 *) obj->Buffer.Pointer) == 0x5) {
 815                         acpi_hp_evaluate_auto_on_off(sc);
 816                 }
 817         }
 818         acpi_hp_free_buffer(&response);
 819 }
 820
 821 static int
 822 acpi_hp_exec_wmi_command(device_t wmi_dev, int command, int is_write, int val)
 823 {
 824         UINT32          params[5] = { 0x55434553,
 825                             is_write?2:1,
 826                             command,
 827                             is_write?4:0,
 828                             val};
 829         UINT32*         result;
 830         ACPI_OBJECT     *obj;
 831         ACPI_BUFFER     in = { sizeof(params), &params };
 832         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 833         int retval;
 834
 835         if (ACPI_FAILURE(ACPI_WMI_EVALUATE_CALL(wmi_dev, ACPI_HP_WMI_BIOS_GUID,
 836                     0, 0x3, &in, &out))) {
 837                 acpi_hp_free_buffer(&out);
 838                 return (-EINVAL);
 839         }
 840         obj = out.Pointer;
 841         if (!obj || obj->Type != ACPI_TYPE_BUFFER) {
 842                 acpi_hp_free_buffer(&out);
 843                 return (-EINVAL);
 844         }
 845         result = (UINT32*) obj->Buffer.Pointer;
 846         retval = result[2];
 847         if (result[1] > 0) {
 848                 retval = result[1];
 849         }
 850         acpi_hp_free_buffer(&out);
 851
 852         return (retval);
 853 }
 854
 855 static __inline char*
 856 acpi_hp_get_string_from_object(ACPI_OBJECT* obj, char* dst, size_t size) {
 857         int     length;
 858
 859         dst[0] = 0;
 860         if (obj->Type == ACPI_TYPE_STRING) {
 861                 length = obj->String.Length+1;
 862                 if (length > size) {
 863                         length = size - 1;
 864                 }
 865                 strlcpy(dst, obj->String.Pointer, length);
 866                 acpi_hp_hex_decode(dst);
 867         }
 868
 869         return (dst);
 870 }
 871
 872
 873 /*
 874  * Read BIOS Setting block in instance "instance".
 875  * The block returned is ACPI_TYPE_PACKAGE which should contain the following
 876  * elements:
 877  * Index Meaning
 878  * 0        Setting Name [string]
 879  * 1        Value (comma separated, asterisk marks the current value) [string]
 880  * 2        Path within the bios hierarchy [string]
 881  * 3        IsReadOnly [int]
 882  * 4        DisplayInUI [int]
 883  * 5        RequiresPhysicalPresence [int]
 884  * 6        Sequence for ordering within the bios settings (absolute) [int]
 885  * 7        Length of prerequisites array [int]
 886  * 8..8+[7] PrerequisiteN [string]
 887  * 9+[7]    Current value (in case of enum) [string] / Array length [int]
 888  * 10+[7]   Enum length [int] / Array values
 889  * 11+[7]ff Enum value at index x [string]
 890  */
 891 static int
 892 acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid, UINT8 instance,
 893     char* outbuf, size_t outsize, UINT32* sequence, int detail)
 894 {
 895         ACPI_OBJECT     *obj;
 896         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 897         int             i;
 898         int             outlen;
 899         int             size = 255;
 900         int             has_enums = 0;
 901         int             valuebase = 0;
 902         char            string_buffer[size];
 903         int             enumbase;
 904
 905         outlen = 0;
 906         outbuf[0] = 0;
 907         if (ACPI_FAILURE(ACPI_WMI_GET_BLOCK(wmi_dev, guid, instance, &out))) {
 908                 acpi_hp_free_buffer(&out);
 909                 return (-EINVAL);
 910         }
 911         obj = out.Pointer;
 912         if (!obj || obj->Type != ACPI_TYPE_PACKAGE) {
 913                 acpi_hp_free_buffer(&out);
 914                 return (-EINVAL);
 915         }
 916
 917         if (obj->Package.Count >= 8 &&
 918             obj->Package.Elements[7].Type == ACPI_TYPE_INTEGER) {
 919             valuebase = 8 + obj->Package.Elements[7].Integer.Value;
 920         }
 921
 922         /* check if this matches our expectations based on limited knowledge */
 923         if (valuebase > 7 && obj->Package.Count > valuebase + 1 &&
 924             obj->Package.Elements[0].Type == ACPI_TYPE_STRING &&
 925             obj->Package.Elements[1].Type == ACPI_TYPE_STRING &&
 926             obj->Package.Elements[2].Type == ACPI_TYPE_STRING &&
 927             obj->Package.Elements[3].Type == ACPI_TYPE_INTEGER &&
 928             obj->Package.Elements[4].Type == ACPI_TYPE_INTEGER &&
 929             obj->Package.Elements[5].Type == ACPI_TYPE_INTEGER &&
 930             obj->Package.Elements[6].Type == ACPI_TYPE_INTEGER &&
 931             obj->Package.Elements[valuebase].Type == ACPI_TYPE_STRING &&
 932             obj->Package.Elements[valuebase+1].Type == ACPI_TYPE_INTEGER &&
 933             obj->Package.Count > valuebase +
 934                 obj->Package.Elements[valuebase+1].Integer.Value
 935            ) {
 936                 enumbase = valuebase + 1;
 937                 if (detail & ACPI_HP_CMI_DETAIL_PATHS) {
 938                         strlcat(outbuf, acpi_hp_get_string_from_object(
 939                                 &obj->Package.Elements[2], string_buffer, size),
 940                                 outsize);
 941                         outlen += 48;
 942                         while (strlen(outbuf) < outlen)
 943                                 strlcat(outbuf, " ", outsize);
 944                 }
 945                 strlcat(outbuf, acpi_hp_get_string_from_object(
 946                                 &obj->Package.Elements[0], string_buffer, size),
 947                                 outsize);
 948                 outlen += 43;
 949                 while (strlen(outbuf) < outlen)
 950                         strlcat(outbuf, " ", outsize);
 951                 strlcat(outbuf, acpi_hp_get_string_from_object(
 952                                 &obj->Package.Elements[valuebase], string_buffer,
 953                                 size),
 954                                 outsize);
 955                 outlen += 21;
 956                 while (strlen(outbuf) < outlen)
 957                         strlcat(outbuf, " ", outsize);
 958                 for (i = 0; i < strlen(outbuf); ++i)
 959                         if (outbuf[i] == '\\')
 960                                 outbuf[i] = '/';
 961                 if (detail & ACPI_HP_CMI_DETAIL_ENUMS) {
 962                         for (i = enumbase + 1; i < enumbase + 1 +
 963                             obj->Package.Elements[enumbase].Integer.Value;
 964                             ++i) {
 965                                 acpi_hp_get_string_from_object(
 966                                     &obj->Package.Elements[i], string_buffer,
 967                                     size);
 968                                 if (strlen(string_buffer) > 1 ||
 969                                     (strlen(string_buffer) == 1 &&
 970                                     string_buffer[0] != ' ')) {
 971                                         if (has_enums)
 972                                                 strlcat(outbuf, "/", outsize);
 973                                         else
 974                                                 strlcat(outbuf, " (", outsize);
 975                                         strlcat(outbuf, string_buffer, outsize);
 976                                         has_enums = 1;
 977                                 }
 978                         }
 979                 }
 980                 if (has_enums)
 981                         strlcat(outbuf, ")", outsize);
 982                 if (detail & ACPI_HP_CMI_DETAIL_FLAGS) {
 983                         strlcat(outbuf, obj->Package.Elements[3].Integer.Value?
 984                             " [ReadOnly]":"", outsize);
 985                         strlcat(outbuf, obj->Package.Elements[4].Integer.Value?
 986                             "":" [NOUI]", outsize);
 987                         strlcat(outbuf, obj->Package.Elements[5].Integer.Value?
 988                             " [RPP]":"", outsize);
 989                 }
 990                 *sequence = (UINT32) obj->Package.Elements[6].Integer.Value;
 991         }
 992         acpi_hp_free_buffer(&out);
 993
 994         return (0);
 995 }
 996
 997
 998
 999 /*
1000  * Convert given two digit hex string (hexin) to an UINT8 referenced
1001  * by byteout.
1002  * Return != 0 if the was a problem (invalid input)
1003  */
1004 static __inline int acpi_hp_hex_to_int(const UINT8 *hexin, UINT8 *byteout)
1005 {
1006         unsigned int    hi;
1007         unsigned int    lo;
1008
1009         hi = hexin[0];
1010         lo = hexin[1];
1011         if ('0' <= hi && hi <= '9')
1012                 hi -= '0';
1013         else if ('A' <= hi && hi <= 'F')
1014                 hi -= ('A' - 10);
1015         else if ('a' <= hi && hi <= 'f')
1016                 hi -= ('a' - 10);
1017         else
1018                 return (1);
1019         if ('0' <= lo && lo <= '9')
1020                 lo -= '0';
1021         else if ('A' <= lo && lo <= 'F')
1022                 lo -= ('A' - 10);
1023         else if ('a' <= lo && lo <= 'f')
1024                 lo -= ('a' - 10);
1025         else
1026                 return (1);
1027         *byteout = (hi << 4) + lo;
1028
1029         return (0);
1030 }
1031
1032
1033 static void
1034 acpi_hp_hex_decode(char* buffer)
1035 {
1036         int     i;
1037         int     length = strlen(buffer);
1038         UINT8   *uin;
1039         UINT8   uout;
1040
1041         if (((int)length/2)*2 == length || length < 10) return;
1042
1043         for (i = 0; i<length; ++i) {
1044                 if (!((i+1)%3)) {
1045                         if (buffer[i] != ' ')
1046                                 return;
1047                 }
1048                 else
1049                         if (!((buffer[i] >= '0' && buffer[i] <= '9') ||
1050                             (buffer[i] >= 'A' && buffer[i] <= 'F')))
1051                                 return;
1052         }
1053
1054         for (i = 0; i<length; i += 3) {
1055                 uin = &buffer[i];
1056                 uout = 0;
1057                 acpi_hp_hex_to_int(uin, &uout);
1058                 buffer[i/3] = (char) uout;
1059         }
1060         buffer[(length+1)/3] = 0;
1061 }
1062
1063
1064 /*
1065  * open hpcmi device
1066  */
1067 static int
1068 acpi_hp_hpcmi_open(struct cdev* dev, int flags, int mode, struct thread *td)
1069 {
1070         struct acpi_hp_softc    *sc;
1071         int                     ret;
1072
1073         if (dev == NULL || dev->si_drv1 == NULL)
1074                 return (EBADF);
1075         sc = dev->si_drv1;
1076
1077         ACPI_SERIAL_BEGIN(hp);
1078         if (sc->hpcmi_open_pid != 0) {
1079                 ret = EBUSY;
1080         }
1081         else {
1082                 if (sbuf_new(&sc->hpcmi_sbuf, NULL, 4096, SBUF_AUTOEXTEND)
1083                     == NULL) {
1084                         ret = ENXIO;
1085                 } else {
1086                         sc->hpcmi_open_pid = td->td_proc->p_pid;
1087                         sc->hpcmi_bufptr = 0;
1088                         ret = 0;
1089                 }
1090         }
1091         ACPI_SERIAL_END(hp);
1092
1093         return (ret);
1094 }
1095
1096 /*
1097  * close hpcmi device
1098  */
1099 static int
1100 acpi_hp_hpcmi_close(struct cdev* dev, int flags, int mode, struct thread *td)
1101 {
1102         struct acpi_hp_softc    *sc;
1103         int                     ret;
1104
1105         if (dev == NULL || dev->si_drv1 == NULL)
1106                 return (EBADF);
1107         sc = dev->si_drv1;
1108
1109         ACPI_SERIAL_BEGIN(hp);
1110         if (sc->hpcmi_open_pid == 0) {
1111                 ret = EBADF;
1112         }
1113         else {
1114                 if (sc->hpcmi_bufptr != -1) {
1115                         sbuf_delete(&sc->hpcmi_sbuf);
1116                         sc->hpcmi_bufptr = -1;
1117                 }
1118                 sc->hpcmi_open_pid = 0;
1119                 ret = 0;
1120         }
1121         ACPI_SERIAL_END(hp);
1122
1123         return (ret);
1124 }
1125
1126 /*
1127  * Read from hpcmi bios information
1128  */
1129 static int
1130 acpi_hp_hpcmi_read(struct cdev *dev, struct uio *buf, int flag)
1131 {
1132         struct acpi_hp_softc    *sc;
1133         int                     pos, i, l, ret;
1134         UINT8                   instance;
1135         UINT8                   maxInstance;
1136         UINT32                  sequence;
1137         int                     linesize = 1025;
1138         char                    line[linesize];
1139
1140         if (dev == NULL || dev->si_drv1 == NULL)
1141                 return (EBADF);
1142         sc = dev->si_drv1;
1143
1144         ACPI_SERIAL_BEGIN(hp);
1145         if (sc->hpcmi_open_pid != buf->uio_td->td_proc->p_pid
1146             || sc->hpcmi_bufptr == -1) {
1147                 ret = EBADF;
1148         }
1149         else {
1150                 if (!sbuf_done(&sc->hpcmi_sbuf)) {
1151                         if (sc->cmi_order_size < 0) {
1152                                 maxInstance = sc->has_cmi;
1153                                 if (!(sc->cmi_detail &
1154                                     ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) &&
1155                                     maxInstance > 0) {
1156                                         maxInstance--;
1157                                 }
1158                                 sc->cmi_order_size = 0;
1159                                 for (instance = 0; instance < maxInstance;
1160                                     ++instance) {
1161                                         if (acpi_hp_get_cmi_block(sc->wmi_dev,
1162                                                 ACPI_HP_WMI_CMI_GUID, instance,
1163                                                 line, linesize, &sequence,
1164                                                 sc->cmi_detail)) {
1165                                                 instance = maxInstance;
1166                                         }
1167                                         else {
1168                                                 pos = sc->cmi_order_size;
1169                                                 for (i=0;
1170                                                   i<sc->cmi_order_size && i<127;
1171                                                      ++i) {
1172                                 if (sc->cmi_order[i].sequence > sequence) {
1173                                                                 pos = i;
1174                                                                 break;
1175                                                         }
1176                                                 }
1177                                                 for (i=sc->cmi_order_size;
1178                                                     i>pos;
1179                                                     --i) {
1180                                                 sc->cmi_order[i].sequence =
1181                                                     sc->cmi_order[i-1].sequence;
1182                                                 sc->cmi_order[i].instance =
1183                                                     sc->cmi_order[i-1].instance;
1184                                                 }
1185                                                 sc->cmi_order[pos].sequence =
1186                                                     sequence;
1187                                                 sc->cmi_order[pos].instance =
1188                                                     instance;
1189                                                 sc->cmi_order_size++;
1190                                         }
1191                                 }
1192                         }
1193                         for (i=0; i<sc->cmi_order_size; ++i) {
1194                                 if (!acpi_hp_get_cmi_block(sc->wmi_dev,
1195                                     ACPI_HP_WMI_CMI_GUID,
1196                                     sc->cmi_order[i].instance, line, linesize,
1197                                     &sequence, sc->cmi_detail)) {
1198                                         sbuf_printf(&sc->hpcmi_sbuf, "%s\n", line);
1199                                 }
1200                         }
1201                         sbuf_finish(&sc->hpcmi_sbuf);
1202                 }
1203                 if (sbuf_len(&sc->hpcmi_sbuf) <= 0) {
1204                         sbuf_delete(&sc->hpcmi_sbuf);
1205                         sc->hpcmi_bufptr = -1;
1206                         sc->hpcmi_open_pid = 0;
1207                         ret = ENOMEM;
1208                 } else {
1209                         l = min(buf->uio_resid, sbuf_len(&sc->hpcmi_sbuf) -
1210                             sc->hpcmi_bufptr);
1211                         ret = (l > 0)?uiomove(sbuf_data(&sc->hpcmi_sbuf) +
1212                             sc->hpcmi_bufptr, l, buf) : 0;
1213                         sc->hpcmi_bufptr += l;
1214                 }
1215         }
1216         ACPI_SERIAL_END(hp);
1217
1218         return (ret);
1219 }