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 1.7 2010/09/11 08:09:14 avg Exp $
  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 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 #if defined (__FreeBSD__)
 310 static d_open_t acpi_hp_hpcmi_open;
 311 static d_close_t acpi_hp_hpcmi_close;
 312 static d_read_t acpi_hp_hpcmi_read;
 313 #else
 314 static int acpi_hp_hpcmi_open(struct dev_open_args *ap);
 315 static int acpi_hp_hpcmi_close(struct dev_close_args *ap);
 316 static int acpi_hp_hpcmi_read(struct dev_read_args *ap);
 317 #endif
 318
 319 /* handler /dev/hpcmi device */
 320 static struct dev_ops hpcmi_ops = {
 321         { .name = "hpcmi" },
 322         .d_open = acpi_hp_hpcmi_open,
 323         .d_close = acpi_hp_hpcmi_close,
 324         .d_read = acpi_hp_hpcmi_read,
 325 };
 326
 327 static device_method_t acpi_hp_methods[] = {
 328         DEVMETHOD(device_identify, acpi_hp_identify),
 329         DEVMETHOD(device_probe, acpi_hp_probe),
 330         DEVMETHOD(device_attach, acpi_hp_attach),
 331         DEVMETHOD(device_detach, acpi_hp_detach),
 332         {0, 0}
 333 };
 334
 335 static driver_t acpi_hp_driver = {
 336         "acpi_hp",
 337         acpi_hp_methods,
 338         sizeof(struct acpi_hp_softc),
 339 };
 340
 341 static devclass_t acpi_hp_devclass;
 342
 343 DRIVER_MODULE(acpi_hp, acpi_wmi, acpi_hp_driver, acpi_hp_devclass,
 344                 NULL, NULL);
 345 MODULE_VERSION(acpi_hp, 1);
 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", ACPI_ROOT_OBJECT,
 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", ACPI_ROOT_OBJECT,
 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", ACPI_ROOT_OBJECT,
 444                             0xe0+sc->was_wwan_on_air);
 445                 }
 446         }
 447 }
 448
 449 static void
 450 acpi_hp_identify(driver_t *driver, device_t parent)
 451 {
 452
 453         /* Don't do anything if driver is disabled. */
 454         if (acpi_disabled("hp"))
 455                 return;
 456
 457         /* Add only a single device instance. */
 458         if (device_find_child(parent, "acpi_hp", -1) != NULL)
 459                 return;
 460
 461         if (BUS_ADD_CHILD(parent, parent, 0, "acpi_hp", -1) == NULL)
 462                 device_printf(parent, "add acpi_hp child failed\n");
 463 }
 464
 465 static int
 466 acpi_hp_probe(device_t dev)
 467 {
 468
 469         device_set_desc(dev, "HP ACPI-WMI Mapping");
 470         return (0);
 471 }
 472
 473 static int
 474 acpi_hp_attach(device_t dev)
 475 {
 476         struct acpi_hp_softc    *sc;
 477         struct acpi_softc       *acpi_sc;
 478         int                     arg;
 479
 480         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 481
 482         sc = device_get_softc(dev);
 483         sc->dev = dev;
 484         sc->has_notify = 0;
 485         sc->has_cmi = 0;
 486         sc->bluetooth_enable_if_radio_on = 0;
 487         sc->bluetooth_disable_if_radio_off = 0;
 488         sc->wlan_enable_if_radio_on = 0;
 489         sc->wlan_disable_if_radio_off = 0;
 490         sc->wlan_enable_if_radio_on = 0;
 491         sc->wlan_disable_if_radio_off = 0;
 492         sc->was_wlan_on_air = 0;
 493         sc->was_bluetooth_on_air = 0;
 494         sc->was_wwan_on_air = 0;
 495         sc->cmi_detail = 0;
 496         sc->cmi_order_size = -1;
 497         sc->verbose = 0;
 498         memset(sc->cmi_order, 0, sizeof(sc->cmi_order));
 499         sc->wmi_dev = device_get_parent(dev);
 500         acpi_sc = acpi_device_get_parent_softc(sc->wmi_dev);
 501
 502         if (!ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 503             ACPI_HP_WMI_BIOS_GUID)) {
 504                 device_printf(dev,
 505                     "WMI device does not provide the HP BIOS GUID\n");
 506                 return (EINVAL);
 507         }
 508         if (ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev,
 509             ACPI_HP_WMI_EVENT_GUID)) {
 510                 device_printf(dev,
 511                     "HP event GUID detected, installing event handler\n");
 512                 if (ACPI_WMI_INSTALL_EVENT_HANDLER(sc->wmi_dev,
 513                     ACPI_HP_WMI_EVENT_GUID, acpi_hp_notify, dev)) {
 514                         device_printf(dev,
 515                             "Could not install notification handler!\n");
 516                 }
 517                 else {
 518                         sc->has_notify = 1;
 519                 }
 520         }
 521         if ((sc->has_cmi =
 522             ACPI_WMI_PROVIDES_GUID_STRING(sc->wmi_dev, ACPI_HP_WMI_CMI_GUID)
 523             )) {
 524                 device_printf(dev, "HP CMI GUID detected\n");
 525         }
 526
 527         if (sc->has_cmi) {
 528                 sc->hpcmi_dev_t = make_dev(&hpcmi_ops, 0, UID_ROOT,
 529                             GID_WHEEL, 0644, "hpcmi");
 530                 sc->hpcmi_dev_t->si_drv1 = sc;
 531                 sc->hpcmi_open_pid = 0;
 532                 sc->hpcmi_bufptr = -1;
 533         }
 534
 535         ACPI_SERIAL_BEGIN(hp);
 536
 537         sysctl_ctx_init(&sc->sysctl_ctx);
 538         sc->sysctl_tree = SYSCTL_ADD_NODE(&sc->sysctl_ctx,
 539                 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO,
 540                 "hp", CTLFLAG_RD, 0, "");
 541
 542         for (int i = 0; acpi_hp_sysctls[i].name != NULL; ++i) {
 543                 arg = 0;
 544                 if ((!sc->has_notify &&
 545                     (acpi_hp_sysctls[i].method ==
 546                         ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON ||
 547                     acpi_hp_sysctls[i].method ==
 548                         ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF ||
 549                     acpi_hp_sysctls[i].method ==
 550                         ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON ||
 551                     acpi_hp_sysctls[i].method ==
 552                         ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF ||
 553                     acpi_hp_sysctls[i].method ==
 554                         ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON ||
 555                     acpi_hp_sysctls[i].method ==
 556                         ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF)) ||
 557                     (arg = acpi_hp_sysctl_get(sc,
 558                     acpi_hp_sysctls[i].method)) < 0) {
 559                         continue;
 560                 }
 561                 if (acpi_hp_sysctls[i].method == ACPI_HP_METHOD_WLAN_ON_AIR) {
 562                         sc->was_wlan_on_air = arg;
 563                 }
 564                 else if (acpi_hp_sysctls[i].method ==
 565                             ACPI_HP_METHOD_BLUETOOTH_ON_AIR) {
 566                         sc->was_bluetooth_on_air = arg;
 567                 }
 568                 else if (acpi_hp_sysctls[i].method ==
 569                             ACPI_HP_METHOD_WWAN_ON_AIR) {
 570                         sc->was_wwan_on_air = arg;
 571                 }
 572
 573                 SYSCTL_ADD_PROC(&sc->sysctl_ctx,
 574                 SYSCTL_CHILDREN(sc->sysctl_tree), OID_AUTO,
 575                         acpi_hp_sysctls[i].name, acpi_hp_sysctls[i].access,
 576                         sc, i, acpi_hp_sysctl, "I",
 577                         acpi_hp_sysctls[i].description);
 578         }
 579         ACPI_SERIAL_END(hp);
 580
 581         return (0);
 582 }
 583
 584 static int
 585 acpi_hp_detach(device_t dev)
 586 {
 587         int     ret;
 588
 589         ACPI_FUNCTION_TRACE((char *)(uintptr_t) __func__);
 590         struct acpi_hp_softc *sc = device_get_softc(dev);
 591         if (sc->has_cmi && sc->hpcmi_open_pid != 0) {
 592                 ret = EBUSY;
 593         }
 594         else {
 595                 if (sc->has_notify) {
 596                         ACPI_WMI_REMOVE_EVENT_HANDLER(dev,
 597                             ACPI_HP_WMI_EVENT_GUID);
 598                 }
 599                 if (sc->hpcmi_bufptr != -1) {
 600                         sbuf_delete(&sc->hpcmi_sbuf);
 601                         sc->hpcmi_bufptr = -1;
 602                 }
 603                 sc->hpcmi_open_pid = 0;
 604                 destroy_dev(sc->hpcmi_dev_t);
 605                 ret = 0;
 606         }
 607
 608         return (ret);
 609 }
 610
 611 static int
 612 acpi_hp_sysctl(SYSCTL_HANDLER_ARGS)
 613 {
 614         struct acpi_hp_softc    *sc;
 615         int                     arg;
 616         int                     oldarg;
 617         int                     error = 0;
 618         int                     function;
 619         int                     method;
 620
 621         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 622
 623         sc = (struct acpi_hp_softc *)oidp->oid_arg1;
 624         function = oidp->oid_arg2;
 625         method = acpi_hp_sysctls[function].method;
 626
 627         ACPI_SERIAL_BEGIN(hp);
 628         arg = acpi_hp_sysctl_get(sc, method);
 629         oldarg = arg;
 630         error = sysctl_handle_int(oidp, &arg, 0, req);
 631         if (!error && req->newptr != NULL) {
 632                 error = acpi_hp_sysctl_set(sc, method, arg, oldarg);
 633         }
 634         ACPI_SERIAL_END(hp);
 635
 636         return (error);
 637 }
 638
 639 static int
 640 acpi_hp_sysctl_get(struct acpi_hp_softc *sc, int method)
 641 {
 642         int     val = 0;
 643
 644         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 645         ACPI_SERIAL_ASSERT(hp);
 646
 647         switch (method) {
 648         case ACPI_HP_METHOD_WLAN_ENABLED:
 649                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 650                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 651                 val = ((val & HP_MASK_WLAN_ENABLED) != 0);
 652                 break;
 653         case ACPI_HP_METHOD_WLAN_RADIO:
 654                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 655                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 656                 val = ((val & HP_MASK_WLAN_RADIO) != 0);
 657                 break;
 658         case ACPI_HP_METHOD_WLAN_ON_AIR:
 659                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 660                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 661                 val = ((val & HP_MASK_WLAN_ON_AIR) != 0);
 662                 break;
 663         case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 664                 val = sc->wlan_enable_if_radio_on;
 665                 break;
 666         case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 667                 val = sc->wlan_disable_if_radio_off;
 668                 break;
 669         case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 670                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 671                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 672                 val = ((val & HP_MASK_BLUETOOTH_ENABLED) != 0);
 673                 break;
 674         case ACPI_HP_METHOD_BLUETOOTH_RADIO:
 675                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 676                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 677                 val = ((val & HP_MASK_BLUETOOTH_RADIO) != 0);
 678                 break;
 679         case ACPI_HP_METHOD_BLUETOOTH_ON_AIR:
 680                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 681                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 682                 val = ((val & HP_MASK_BLUETOOTH_ON_AIR) != 0);
 683                 break;
 684         case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 685                 val = sc->bluetooth_enable_if_radio_on;
 686                 break;
 687         case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 688                 val = sc->bluetooth_disable_if_radio_off;
 689                 break;
 690         case ACPI_HP_METHOD_WWAN_ENABLED:
 691                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 692                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 693                 val = ((val & HP_MASK_WWAN_ENABLED) != 0);
 694                 break;
 695         case ACPI_HP_METHOD_WWAN_RADIO:
 696                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 697                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 698                 val = ((val & HP_MASK_WWAN_RADIO) != 0);
 699                 break;
 700         case ACPI_HP_METHOD_WWAN_ON_AIR:
 701                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 702                         ACPI_HP_WMI_WIRELESS_COMMAND, 0, 0);
 703                 val = ((val & HP_MASK_WWAN_ON_AIR) != 0);
 704                 break;
 705         case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 706                 val = sc->wwan_enable_if_radio_on;
 707                 break;
 708         case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 709                 val = sc->wwan_disable_if_radio_off;
 710                 break;
 711         case ACPI_HP_METHOD_ALS:
 712                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 713                         ACPI_HP_WMI_ALS_COMMAND, 0, 0);
 714                 break;
 715         case ACPI_HP_METHOD_DISPLAY:
 716                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 717                         ACPI_HP_WMI_DISPLAY_COMMAND, 0, 0);
 718                 break;
 719         case ACPI_HP_METHOD_HDDTEMP:
 720                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 721                         ACPI_HP_WMI_HDDTEMP_COMMAND, 0, 0);
 722                 break;
 723         case ACPI_HP_METHOD_DOCK:
 724                 val = acpi_hp_exec_wmi_command(sc->wmi_dev,
 725                         ACPI_HP_WMI_DOCK_COMMAND, 0, 0);
 726                 break;
 727         case ACPI_HP_METHOD_CMI_DETAIL:
 728                 val = sc->cmi_detail;
 729                 break;
 730         case ACPI_HP_METHOD_VERBOSE:
 731                 val = sc->verbose;
 732                 break;
 733         }
 734
 735         return (val);
 736 }
 737
 738 static int
 739 acpi_hp_sysctl_set(struct acpi_hp_softc *sc, int method, int arg, int oldarg)
 740 {
 741         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 742         ACPI_SERIAL_ASSERT(hp);
 743
 744         if (method != ACPI_HP_METHOD_CMI_DETAIL &&
 745             method != ACPI_HP_METHOD_VERBOSE)
 746                 arg = arg?1:0;
 747
 748         if (arg != oldarg) {
 749                 switch (method) {
 750                 case ACPI_HP_METHOD_WLAN_ENABLED:
 751                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 752                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 753                                     arg?0x101:0x100));
 754                 case ACPI_HP_METHOD_WLAN_ENABLE_IF_RADIO_ON:
 755                         sc->wlan_enable_if_radio_on = arg;
 756                         acpi_hp_evaluate_auto_on_off(sc);
 757                         break;
 758                 case ACPI_HP_METHOD_WLAN_DISABLE_IF_RADIO_OFF:
 759                         sc->wlan_disable_if_radio_off = arg;
 760                         acpi_hp_evaluate_auto_on_off(sc);
 761                         break;
 762                 case ACPI_HP_METHOD_BLUETOOTH_ENABLED:
 763                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 764                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 765                                     arg?0x202:0x200));
 766                 case ACPI_HP_METHOD_BLUETOOTH_ENABLE_IF_RADIO_ON:
 767                         sc->bluetooth_enable_if_radio_on = arg;
 768                         acpi_hp_evaluate_auto_on_off(sc);
 769                         break;
 770                 case ACPI_HP_METHOD_BLUETOOTH_DISABLE_IF_RADIO_OFF:
 771                         sc->bluetooth_disable_if_radio_off = arg?1:0;
 772                         acpi_hp_evaluate_auto_on_off(sc);
 773                         break;
 774                 case ACPI_HP_METHOD_WWAN_ENABLED:
 775                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 776                                     ACPI_HP_WMI_WIRELESS_COMMAND, 1,
 777                                     arg?0x404:0x400));
 778                 case ACPI_HP_METHOD_WWAN_ENABLE_IF_RADIO_ON:
 779                         sc->wwan_enable_if_radio_on = arg?1:0;
 780                         acpi_hp_evaluate_auto_on_off(sc);
 781                         break;
 782                 case ACPI_HP_METHOD_WWAN_DISABLE_IF_RADIO_OFF:
 783                         sc->wwan_disable_if_radio_off = arg?1:0;
 784                         acpi_hp_evaluate_auto_on_off(sc);
 785                         break;
 786                 case ACPI_HP_METHOD_ALS:
 787                         return (acpi_hp_exec_wmi_command(sc->wmi_dev,
 788                                     ACPI_HP_WMI_ALS_COMMAND, 1,
 789                                     arg?1:0));
 790                 case ACPI_HP_METHOD_CMI_DETAIL:
 791                         sc->cmi_detail = arg;
 792                         if ((arg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) !=
 793                             (oldarg & ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE)) {
 794                             sc->cmi_order_size = -1;
 795                         }
 796                         break;
 797                 case ACPI_HP_METHOD_VERBOSE:
 798                         sc->verbose = arg;
 799                         break;
 800                 }
 801         }
 802
 803         return (0);
 804 }
 805
 806 static __inline void
 807 acpi_hp_free_buffer(ACPI_BUFFER* buf) {
 808         if (buf && buf->Pointer) {
 809                 AcpiOsFree(buf->Pointer);
 810         }
 811 }
 812
 813 static void
 814 acpi_hp_notify(ACPI_HANDLE h, UINT32 notify, void *context)
 815 {
 816         device_t dev = context;
 817         ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, notify);
 818
 819         struct acpi_hp_softc *sc = device_get_softc(dev);
 820         ACPI_BUFFER response = { ACPI_ALLOCATE_BUFFER, NULL };
 821         ACPI_OBJECT *obj;
 822         ACPI_WMI_GET_EVENT_DATA(sc->wmi_dev, notify, &response);
 823         obj = (ACPI_OBJECT*) response.Pointer;
 824         if (obj && obj->Type == ACPI_TYPE_BUFFER && obj->Buffer.Length == 8) {
 825                 if (*((UINT8 *) obj->Buffer.Pointer) == 0x5) {
 826                         acpi_hp_evaluate_auto_on_off(sc);
 827                 }
 828         }
 829         acpi_hp_free_buffer(&response);
 830 }
 831
 832 static int
 833 acpi_hp_exec_wmi_command(device_t wmi_dev, int command, int is_write, int val)
 834 {
 835         UINT32          params[5] = { 0x55434553,
 836                             is_write?2:1,
 837                             command,
 838                             is_write?4:0,
 839                             val};
 840         UINT32*         result;
 841         ACPI_OBJECT     *obj;
 842         ACPI_BUFFER     in = { sizeof(params), &params };
 843         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 844         int retval;
 845
 846         if (ACPI_FAILURE(ACPI_WMI_EVALUATE_CALL(wmi_dev, ACPI_HP_WMI_BIOS_GUID,
 847                     0, 0x3, &in, &out))) {
 848                 acpi_hp_free_buffer(&out);
 849                 return (-EINVAL);
 850         }
 851         obj = out.Pointer;
 852         if (!obj || obj->Type != ACPI_TYPE_BUFFER) {
 853                 acpi_hp_free_buffer(&out);
 854                 return (-EINVAL);
 855         }
 856         result = (UINT32*) obj->Buffer.Pointer;
 857         retval = result[2];
 858         if (result[1] > 0) {
 859                 retval = result[1];
 860         }
 861         acpi_hp_free_buffer(&out);
 862
 863         return (retval);
 864 }
 865
 866 static __inline char*
 867 acpi_hp_get_string_from_object(ACPI_OBJECT* obj, char* dst, size_t size) {
 868         int     length;
 869
 870         dst[0] = 0;
 871         if (obj->Type == ACPI_TYPE_STRING) {
 872                 length = obj->String.Length+1;
 873                 if (length > size) {
 874                         length = size - 1;
 875                 }
 876                 strlcpy(dst, obj->String.Pointer, length);
 877                 acpi_hp_hex_decode(dst);
 878         }
 879
 880         return (dst);
 881 }
 882
 883
 884 /*
 885  * Read BIOS Setting block in instance "instance".
 886  * The block returned is ACPI_TYPE_PACKAGE which should contain the following
 887  * elements:
 888  * Index Meaning
 889  * 0        Setting Name [string]
 890  * 1        Value (comma separated, asterisk marks the current value) [string]
 891  * 2        Path within the bios hierarchy [string]
 892  * 3        IsReadOnly [int]
 893  * 4        DisplayInUI [int]
 894  * 5        RequiresPhysicalPresence [int]
 895  * 6        Sequence for ordering within the bios settings (absolute) [int]
 896  * 7        Length of prerequisites array [int]
 897  * 8..8+[7] PrerequisiteN [string]
 898  * 9+[7]    Current value (in case of enum) [string] / Array length [int]
 899  * 10+[7]   Enum length [int] / Array values
 900  * 11+[7]ff Enum value at index x [string]
 901  */
 902 static int
 903 acpi_hp_get_cmi_block(device_t wmi_dev, const char* guid, UINT8 instance,
 904     char* outbuf, size_t outsize, UINT32* sequence, int detail)
 905 {
 906         ACPI_OBJECT     *obj;
 907         ACPI_BUFFER     out = { ACPI_ALLOCATE_BUFFER, NULL };
 908         int             i;
 909         int             outlen;
 910         int             size = 255;
 911         int             has_enums = 0;
 912         int             valuebase = 0;
 913         char            string_buffer[size];
 914         int             enumbase;
 915
 916         outlen = 0;
 917         outbuf[0] = 0;
 918         if (ACPI_FAILURE(ACPI_WMI_GET_BLOCK(wmi_dev, guid, instance, &out))) {
 919                 acpi_hp_free_buffer(&out);
 920                 return (-EINVAL);
 921         }
 922         obj = out.Pointer;
 923         if (!obj || obj->Type != ACPI_TYPE_PACKAGE) {
 924                 acpi_hp_free_buffer(&out);
 925                 return (-EINVAL);
 926         }
 927
 928         if (obj->Package.Count >= 8 &&
 929             obj->Package.Elements[7].Type == ACPI_TYPE_INTEGER) {
 930             valuebase = 8 + obj->Package.Elements[7].Integer.Value;
 931         }
 932
 933         /* check if this matches our expectations based on limited knowledge */
 934         if (valuebase > 7 && obj->Package.Count > valuebase + 1 &&
 935             obj->Package.Elements[0].Type == ACPI_TYPE_STRING &&
 936             obj->Package.Elements[1].Type == ACPI_TYPE_STRING &&
 937             obj->Package.Elements[2].Type == ACPI_TYPE_STRING &&
 938             obj->Package.Elements[3].Type == ACPI_TYPE_INTEGER &&
 939             obj->Package.Elements[4].Type == ACPI_TYPE_INTEGER &&
 940             obj->Package.Elements[5].Type == ACPI_TYPE_INTEGER &&
 941             obj->Package.Elements[6].Type == ACPI_TYPE_INTEGER &&
 942             obj->Package.Elements[valuebase].Type == ACPI_TYPE_STRING &&
 943             obj->Package.Elements[valuebase+1].Type == ACPI_TYPE_INTEGER &&
 944             obj->Package.Count > valuebase +
 945                 obj->Package.Elements[valuebase+1].Integer.Value
 946            ) {
 947                 enumbase = valuebase + 1;
 948                 if (detail & ACPI_HP_CMI_DETAIL_PATHS) {
 949                         strlcat(outbuf, acpi_hp_get_string_from_object(
 950                                 &obj->Package.Elements[2], string_buffer, size),
 951                                 outsize);
 952                         outlen += 48;
 953                         while (strlen(outbuf) < outlen)
 954                                 strlcat(outbuf, " ", outsize);
 955                 }
 956                 strlcat(outbuf, acpi_hp_get_string_from_object(
 957                                 &obj->Package.Elements[0], string_buffer, size),
 958                                 outsize);
 959                 outlen += 43;
 960                 while (strlen(outbuf) < outlen)
 961                         strlcat(outbuf, " ", outsize);
 962                 strlcat(outbuf, acpi_hp_get_string_from_object(
 963                                 &obj->Package.Elements[valuebase], string_buffer,
 964                                 size),
 965                                 outsize);
 966                 outlen += 21;
 967                 while (strlen(outbuf) < outlen)
 968                         strlcat(outbuf, " ", outsize);
 969                 for (i = 0; i < strlen(outbuf); ++i)
 970                         if (outbuf[i] == '\\')
 971                                 outbuf[i] = '/';
 972                 if (detail & ACPI_HP_CMI_DETAIL_ENUMS) {
 973                         for (i = enumbase + 1; i < enumbase + 1 +
 974                             obj->Package.Elements[enumbase].Integer.Value;
 975                             ++i) {
 976                                 acpi_hp_get_string_from_object(
 977                                     &obj->Package.Elements[i], string_buffer,
 978                                     size);
 979                                 if (strlen(string_buffer) > 1 ||
 980                                     (strlen(string_buffer) == 1 &&
 981                                     string_buffer[0] != ' ')) {
 982                                         if (has_enums)
 983                                                 strlcat(outbuf, "/", outsize);
 984                                         else
 985                                                 strlcat(outbuf, " (", outsize);
 986                                         strlcat(outbuf, string_buffer, outsize);
 987                                         has_enums = 1;
 988                                 }
 989                         }
 990                 }
 991                 if (has_enums)
 992                         strlcat(outbuf, ")", outsize);
 993                 if (detail & ACPI_HP_CMI_DETAIL_FLAGS) {
 994                         strlcat(outbuf, obj->Package.Elements[3].Integer.Value?
 995                             " [ReadOnly]":"", outsize);
 996                         strlcat(outbuf, obj->Package.Elements[4].Integer.Value?
 997                             "":" [NOUI]", outsize);
 998                         strlcat(outbuf, obj->Package.Elements[5].Integer.Value?
 999                             " [RPP]":"", outsize);
1000                 }
1001                 *sequence = (UINT32) obj->Package.Elements[6].Integer.Value;
1002         }
1003         acpi_hp_free_buffer(&out);
1004
1005         return (0);
1006 }
1007
1008
1009
1010 /*
1011  * Convert given two digit hex string (hexin) to an UINT8 referenced
1012  * by byteout.
1013  * Return != 0 if the was a problem (invalid input)
1014  */
1015 static __inline int acpi_hp_hex_to_int(const UINT8 *hexin, UINT8 *byteout)
1016 {
1017         unsigned int    hi;
1018         unsigned int    lo;
1019
1020         hi = hexin[0];
1021         lo = hexin[1];
1022         if ('0' <= hi && hi <= '9')
1023                 hi -= '0';
1024         else if ('A' <= hi && hi <= 'F')
1025                 hi -= ('A' - 10);
1026         else if ('a' <= hi && hi <= 'f')
1027                 hi -= ('a' - 10);
1028         else
1029                 return (1);
1030         if ('0' <= lo && lo <= '9')
1031                 lo -= '0';
1032         else if ('A' <= lo && lo <= 'F')
1033                 lo -= ('A' - 10);
1034         else if ('a' <= lo && lo <= 'f')
1035                 lo -= ('a' - 10);
1036         else
1037                 return (1);
1038         *byteout = (hi << 4) + lo;
1039
1040         return (0);
1041 }
1042
1043
1044 static void
1045 acpi_hp_hex_decode(char* buffer)
1046 {
1047         int     i;
1048         int     length = strlen(buffer);
1049         UINT8   *uin;
1050         UINT8   uout;
1051
1052         if (((int)length/2)*2 == length || length < 10) return;
1053
1054         for (i = 0; i<length; ++i) {
1055                 if (!((i+1)%3)) {
1056                         if (buffer[i] != ' ')
1057                                 return;
1058                 }
1059                 else
1060                         if (!((buffer[i] >= '0' && buffer[i] <= '9') ||
1061                             (buffer[i] >= 'A' && buffer[i] <= 'F')))
1062                                 return;
1063         }
1064
1065         for (i = 0; i<length; i += 3) {
1066                 uin = &buffer[i];
1067                 uout = 0;
1068                 acpi_hp_hex_to_int(uin, &uout);
1069                 buffer[i/3] = (char) uout;
1070         }
1071         buffer[(length+1)/3] = 0;
1072 }
1073
1074
1075 /*
1076  * open hpcmi device
1077  */
1078 static int
1079 acpi_hp_hpcmi_open(struct dev_open_args *ap)
1080 {
1081         struct acpi_hp_softc    *sc;
1082         int                     ret;
1083         struct cdev *dev = ap->a_head.a_dev;
1084         struct thread *td = curthread;
1085
1086         if (dev == NULL || dev->si_drv1 == NULL)
1087                 return (EBADF);
1088         sc = dev->si_drv1;
1089
1090         ACPI_SERIAL_BEGIN(hp);
1091         if (sc->hpcmi_open_pid != 0) {
1092                 ret = EBUSY;
1093         }
1094         else {
1095                 if (sbuf_new(&sc->hpcmi_sbuf, NULL, 4096, SBUF_AUTOEXTEND)
1096                     == NULL) {
1097                         ret = ENXIO;
1098                 } else {
1099                         sc->hpcmi_open_pid = td->td_proc->p_pid;
1100                         sc->hpcmi_bufptr = 0;
1101                         ret = 0;
1102                 }
1103         }
1104         ACPI_SERIAL_END(hp);
1105
1106         return (ret);
1107 }
1108
1109 /*
1110  * close hpcmi device
1111  */
1112 static int
1113 acpi_hp_hpcmi_close(struct dev_close_args *ap)
1114 {
1115         struct acpi_hp_softc    *sc;
1116         int                     ret;
1117         struct cdev *dev = ap->a_head.a_dev;
1118
1119         if (dev == NULL || dev->si_drv1 == NULL)
1120                 return (EBADF);
1121         sc = dev->si_drv1;
1122
1123         ACPI_SERIAL_BEGIN(hp);
1124         if (sc->hpcmi_open_pid == 0) {
1125                 ret = EBADF;
1126         }
1127         else {
1128                 if (sc->hpcmi_bufptr != -1) {
1129                         sbuf_delete(&sc->hpcmi_sbuf);
1130                         sc->hpcmi_bufptr = -1;
1131                 }
1132                 sc->hpcmi_open_pid = 0;
1133                 ret = 0;
1134         }
1135         ACPI_SERIAL_END(hp);
1136
1137         return (ret);
1138 }
1139
1140 /*
1141  * Read from hpcmi bios information
1142  */
1143 static int
1144 acpi_hp_hpcmi_read(struct dev_read_args *ap)
1145 {
1146         struct acpi_hp_softc    *sc;
1147         int                     pos, i, l, ret;
1148         UINT8                   instance;
1149         UINT8                   maxInstance;
1150         UINT32                  sequence;
1151         int                     linesize = 1025;
1152         char                    line[linesize];
1153         struct cdev *dev = ap->a_head.a_dev;
1154         struct uio *buf = ap->a_uio;
1155
1156         if (dev == NULL || dev->si_drv1 == NULL)
1157                 return (EBADF);
1158         sc = dev->si_drv1;
1159
1160         ACPI_SERIAL_BEGIN(hp);
1161         if (sc->hpcmi_open_pid != buf->uio_td->td_proc->p_pid
1162             || sc->hpcmi_bufptr == -1) {
1163                 ret = EBADF;
1164         }
1165         else {
1166                 if (!sbuf_done(&sc->hpcmi_sbuf)) {
1167                         if (sc->cmi_order_size < 0) {
1168                                 maxInstance = sc->has_cmi;
1169                                 if (!(sc->cmi_detail &
1170                                     ACPI_HP_CMI_DETAIL_SHOW_MAX_INSTANCE) &&
1171                                     maxInstance > 0) {
1172                                         maxInstance--;
1173                                 }
1174                                 sc->cmi_order_size = 0;
1175                                 for (instance = 0; instance < maxInstance;
1176                                     ++instance) {
1177                                         if (acpi_hp_get_cmi_block(sc->wmi_dev,
1178                                                 ACPI_HP_WMI_CMI_GUID, instance,
1179                                                 line, linesize, &sequence,
1180                                                 sc->cmi_detail)) {
1181                                                 instance = maxInstance;
1182                                         }
1183                                         else {
1184                                                 pos = sc->cmi_order_size;
1185                                                 for (i=0;
1186                                                   i<sc->cmi_order_size && i<127;
1187                                                      ++i) {
1188                                 if (sc->cmi_order[i].sequence > sequence) {
1189                                                                 pos = i;
1190                                                                 break;
1191                                                         }
1192                                                 }
1193                                                 for (i=sc->cmi_order_size;
1194                                                     i>pos;
1195                                                     --i) {
1196                                                 sc->cmi_order[i].sequence =
1197                                                     sc->cmi_order[i-1].sequence;
1198                                                 sc->cmi_order[i].instance =
1199                                                     sc->cmi_order[i-1].instance;
1200                                                 }
1201                                                 sc->cmi_order[pos].sequence =
1202                                                     sequence;
1203                                                 sc->cmi_order[pos].instance =
1204                                                     instance;
1205                                                 sc->cmi_order_size++;
1206                                         }
1207                                 }
1208                         }
1209                         for (i=0; i<sc->cmi_order_size; ++i) {
1210                                 if (!acpi_hp_get_cmi_block(sc->wmi_dev,
1211                                     ACPI_HP_WMI_CMI_GUID,
1212                                     sc->cmi_order[i].instance, line, linesize,
1213                                     &sequence, sc->cmi_detail)) {
1214                                         sbuf_printf(&sc->hpcmi_sbuf, "%s\n", line);
1215                                 }
1216                         }
1217                         sbuf_finish(&sc->hpcmi_sbuf);
1218                 }
1219                 if (sbuf_len(&sc->hpcmi_sbuf) <= 0) {
1220                         sbuf_delete(&sc->hpcmi_sbuf);
1221                         sc->hpcmi_bufptr = -1;
1222                         sc->hpcmi_open_pid = 0;
1223                         ret = ENOMEM;
1224                 } else {
1225                         l = min(buf->uio_resid, sbuf_len(&sc->hpcmi_sbuf) -
1226                             sc->hpcmi_bufptr);
1227                         ret = (l > 0)?uiomove(sbuf_data(&sc->hpcmi_sbuf) +
1228                             sc->hpcmi_bufptr, l, buf) : 0;
1229                         sc->hpcmi_bufptr += l;
1230                 }
1231         }
1232         ACPI_SERIAL_END(hp);
1233
1234         return (ret);
1235 }