hw/misc/applesmc.c

   1 /*
   2  *  Apple SMC controller
   3  *
   4  *  Copyright (c) 2007 Alexander Graf
   5  *
   6  *  Authors: Alexander Graf <agraf@suse.de>
   7  *           Susanne Graf <suse@csgraf.de>
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  21  *
  22  * *****************************************************************
  23  *
  24  * In all Intel-based Apple hardware there is an SMC chip to control the
  25  * backlight, fans and several other generic device parameters. It also
  26  * contains the magic keys used to dongle Mac OS X to the device.
  27  *
  28  * This driver was mostly created by looking at the Linux AppleSMC driver
  29  * implementation and does not support IRQ.
  30  *
  31  */
  32
  33 #include "hw/hw.h"
  34 #include "hw/isa/isa.h"
  35 #include "ui/console.h"
  36 #include "qemu/timer.h"
  37
  38 /* #define DEBUG_SMC */
  39
  40 #define APPLESMC_DEFAULT_IOBASE        0x300
  41 /* data port used by Apple SMC */
  42 #define APPLESMC_DATA_PORT             0x0
  43 /* command/status port used by Apple SMC */
  44 #define APPLESMC_CMD_PORT              0x4
  45 #define APPLESMC_NR_PORTS              32
  46 #define APPLESMC_MAX_DATA_LENGTH       32
  47
  48 #define APPLESMC_READ_CMD              0x10
  49 #define APPLESMC_WRITE_CMD             0x11
  50 #define APPLESMC_GET_KEY_BY_INDEX_CMD  0x12
  51 #define APPLESMC_GET_KEY_TYPE_CMD      0x13
  52
  53 #ifdef DEBUG_SMC
  54 #define smc_debug(...) fprintf(stderr, "AppleSMC: " __VA_ARGS__)
  55 #else
  56 #define smc_debug(...) do { } while(0)
  57 #endif
  58
  59 static char default_osk[64] = "This is a dummy key. Enter the real key "
  60                               "using the -osk parameter";
  61
  62 struct AppleSMCData {
  63     uint8_t len;
  64     const char *key;
  65     const char *data;
  66     QLIST_ENTRY(AppleSMCData) node;
  67 };
  68
  69 #define TYPE_APPLE_SMC "isa-applesmc"
  70 #define APPLE_SMC(obj) OBJECT_CHECK(AppleSMCState, (obj), TYPE_APPLE_SMC)
  71
  72 typedef struct AppleSMCState AppleSMCState;
  73 struct AppleSMCState {
  74     ISADevice parent_obj;
  75
  76     MemoryRegion io_data;
  77     MemoryRegion io_cmd;
  78     uint32_t iobase;
  79     uint8_t cmd;
  80     uint8_t status;
  81     uint8_t key[4];
  82     uint8_t read_pos;
  83     uint8_t data_len;
  84     uint8_t data_pos;
  85     uint8_t data[255];
  86     uint8_t charactic[4];
  87     char *osk;
  88     QLIST_HEAD(, AppleSMCData) data_def;
  89 };
  90
  91 static void applesmc_io_cmd_write(void *opaque, hwaddr addr, uint64_t val,
  92                                   unsigned size)
  93 {
  94     AppleSMCState *s = opaque;
  95
  96     smc_debug("CMD Write B: %#x = %#x\n", addr, val);
  97     switch(val) {
  98         case APPLESMC_READ_CMD:
  99             s->status = 0x0c;
 100             break;
 101     }
 102     s->cmd = val;
 103     s->read_pos = 0;
 104     s->data_pos = 0;
 105 }
 106
 107 static void applesmc_fill_data(AppleSMCState *s)
 108 {
 109     struct AppleSMCData *d;
 110
 111     QLIST_FOREACH(d, &s->data_def, node) {
 112         if (!memcmp(d->key, s->key, 4)) {
 113             smc_debug("Key matched (%s Len=%d Data=%s)\n", d->key,
 114                       d->len, d->data);
 115             memcpy(s->data, d->data, d->len);
 116             return;
 117         }
 118     }
 119 }
 120
 121 static void applesmc_io_data_write(void *opaque, hwaddr addr, uint64_t val,
 122                                    unsigned size)
 123 {
 124     AppleSMCState *s = opaque;
 125
 126     smc_debug("DATA Write B: %#x = %#x\n", addr, val);
 127     switch(s->cmd) {
 128         case APPLESMC_READ_CMD:
 129             if(s->read_pos < 4) {
 130                 s->key[s->read_pos] = val;
 131                 s->status = 0x04;
 132             } else if(s->read_pos == 4) {
 133                 s->data_len = val;
 134                 s->status = 0x05;
 135                 s->data_pos = 0;
 136                 smc_debug("Key = %c%c%c%c Len = %d\n", s->key[0],
 137                           s->key[1], s->key[2], s->key[3], val);
 138                 applesmc_fill_data(s);
 139             }
 140             s->read_pos++;
 141             break;
 142     }
 143 }
 144
 145 static uint64_t applesmc_io_data_read(void *opaque, hwaddr addr1,
 146                                       unsigned size)
 147 {
 148     AppleSMCState *s = opaque;
 149     uint8_t retval = 0;
 150
 151     switch(s->cmd) {
 152         case APPLESMC_READ_CMD:
 153             if(s->data_pos < s->data_len) {
 154                 retval = s->data[s->data_pos];
 155                 smc_debug("READ_DATA[%d] = %#hhx\n", s->data_pos,
 156                           retval);
 157                 s->data_pos++;
 158                 if(s->data_pos == s->data_len) {
 159                     s->status = 0x00;
 160                     smc_debug("EOF\n");
 161                 } else
 162                     s->status = 0x05;
 163             }
 164     }
 165     smc_debug("DATA Read b: %#x = %#x\n", addr1, retval);
 166
 167     return retval;
 168 }
 169
 170 static uint64_t applesmc_io_cmd_read(void *opaque, hwaddr addr1, unsigned size)
 171 {
 172     AppleSMCState *s = opaque;
 173
 174     smc_debug("CMD Read B: %#x\n", addr1);
 175     return s->status;
 176 }
 177
 178 static void applesmc_add_key(AppleSMCState *s, const char *key,
 179                              int len, const char *data)
 180 {
 181     struct AppleSMCData *def;
 182
 183     def = g_malloc0(sizeof(struct AppleSMCData));
 184     def->key = key;
 185     def->len = len;
 186     def->data = data;
 187
 188     QLIST_INSERT_HEAD(&s->data_def, def, node);
 189 }
 190
 191 static void qdev_applesmc_isa_reset(DeviceState *dev)
 192 {
 193     AppleSMCState *s = APPLE_SMC(dev);
 194     struct AppleSMCData *d, *next;
 195
 196     /* Remove existing entries */
 197     QLIST_FOREACH_SAFE(d, &s->data_def, node, next) {
 198         QLIST_REMOVE(d, node);
 199     }
 200
 201     applesmc_add_key(s, "REV ", 6, "\x01\x13\x0f\x00\x00\x03");
 202     applesmc_add_key(s, "OSK0", 32, s->osk);
 203     applesmc_add_key(s, "OSK1", 32, s->osk + 32);
 204     applesmc_add_key(s, "NATJ", 1, "\0");
 205     applesmc_add_key(s, "MSSP", 1, "\0");
 206     applesmc_add_key(s, "MSSD", 1, "\0x3");
 207 }
 208
 209 static const MemoryRegionOps applesmc_data_io_ops = {
 210     .write = applesmc_io_data_write,
 211     .read = applesmc_io_data_read,
 212     .endianness = DEVICE_NATIVE_ENDIAN,
 213     .impl = {
 214         .min_access_size = 1,
 215         .max_access_size = 1,
 216     },
 217 };
 218
 219 static const MemoryRegionOps applesmc_cmd_io_ops = {
 220     .write = applesmc_io_cmd_write,
 221     .read = applesmc_io_cmd_read,
 222     .endianness = DEVICE_NATIVE_ENDIAN,
 223     .impl = {
 224         .min_access_size = 1,
 225         .max_access_size = 1,
 226     },
 227 };
 228
 229 static void applesmc_isa_realize(DeviceState *dev, Error **errp)
 230 {
 231     AppleSMCState *s = APPLE_SMC(dev);
 232
 233     memory_region_init_io(&s->io_data, NULL, &applesmc_data_io_ops, s,
 234                           "applesmc-data", 4);
 235     isa_register_ioport(&s->parent_obj, &s->io_data,
 236                         s->iobase + APPLESMC_DATA_PORT);
 237
 238     memory_region_init_io(&s->io_cmd, NULL, &applesmc_cmd_io_ops, s,
 239                           "applesmc-cmd", 4);
 240     isa_register_ioport(&s->parent_obj, &s->io_cmd,
 241                         s->iobase + APPLESMC_CMD_PORT);
 242
 243     if (!s->osk || (strlen(s->osk) != 64)) {
 244         fprintf(stderr, "WARNING: Using AppleSMC with invalid key\n");
 245         s->osk = default_osk;
 246     }
 247
 248     QLIST_INIT(&s->data_def);
 249     qdev_applesmc_isa_reset(dev);
 250 }
 251
 252 static Property applesmc_isa_properties[] = {
 253     DEFINE_PROP_HEX32("iobase", AppleSMCState, iobase,
 254                       APPLESMC_DEFAULT_IOBASE),
 255     DEFINE_PROP_STRING("osk", AppleSMCState, osk),
 256     DEFINE_PROP_END_OF_LIST(),
 257 };
 258
 259 static void qdev_applesmc_class_init(ObjectClass *klass, void *data)
 260 {
 261     DeviceClass *dc = DEVICE_CLASS(klass);
 262
 263     dc->realize = applesmc_isa_realize;
 264     dc->reset = qdev_applesmc_isa_reset;
 265     dc->props = applesmc_isa_properties;
 266 }
 267
 268 static const TypeInfo applesmc_isa_info = {
 269     .name          = TYPE_APPLE_SMC,
 270     .parent        = TYPE_ISA_DEVICE,
 271     .instance_size = sizeof(AppleSMCState),
 272     .class_init    = qdev_applesmc_class_init,
 273 };
 274
 275 static void applesmc_register_types(void)
 276 {
 277     type_register_static(&applesmc_isa_info);
 278 }
 279
 280 type_init(applesmc_register_types)