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 "qemu/osdep.h"
  34 #include "hw/hw.h"
  35 #include "hw/isa/isa.h"
  36 #include "ui/console.h"
  37 #include "qemu/timer.h"
  38
  39 /* #define DEBUG_SMC */
  40
  41 #define APPLESMC_DEFAULT_IOBASE        0x300
  42 /* data port used by Apple SMC */
  43 #define APPLESMC_DATA_PORT             0x0
  44 /* command/status port used by Apple SMC */
  45 #define APPLESMC_CMD_PORT              0x4
  46 #define APPLESMC_NR_PORTS              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 APPLE_SMC(obj) OBJECT_CHECK(AppleSMCState, (obj), TYPE_APPLE_SMC)
  70
  71 typedef struct AppleSMCState AppleSMCState;
  72 struct AppleSMCState {
  73     ISADevice parent_obj;
  74
  75     MemoryRegion io_data;
  76     MemoryRegion io_cmd;
  77     uint32_t iobase;
  78     uint8_t cmd;
  79     uint8_t status;
  80     uint8_t key[4];
  81     uint8_t read_pos;
  82     uint8_t data_len;
  83     uint8_t data_pos;
  84     uint8_t data[255];
  85     uint8_t charactic[4];
  86     char *osk;
  87     QLIST_HEAD(, AppleSMCData) data_def;
  88 };
  89
  90 static void applesmc_io_cmd_write(void *opaque, hwaddr addr, uint64_t val,
  91                                   unsigned size)
  92 {
  93     AppleSMCState *s = opaque;
  94
  95     smc_debug("CMD Write B: %#x = %#x\n", addr, val);
  96     switch(val) {
  97         case APPLESMC_READ_CMD:
  98             s->status = 0x0c;
  99             break;
 100     }
 101     s->cmd = val;
 102     s->read_pos = 0;
 103     s->data_pos = 0;
 104 }
 105
 106 static void applesmc_fill_data(AppleSMCState *s)
 107 {
 108     struct AppleSMCData *d;
 109
 110     QLIST_FOREACH(d, &s->data_def, node) {
 111         if (!memcmp(d->key, s->key, 4)) {
 112             smc_debug("Key matched (%s Len=%d Data=%s)\n", d->key,
 113                       d->len, d->data);
 114             memcpy(s->data, d->data, d->len);
 115             return;
 116         }
 117     }
 118 }
 119
 120 static void applesmc_io_data_write(void *opaque, hwaddr addr, uint64_t val,
 121                                    unsigned size)
 122 {
 123     AppleSMCState *s = opaque;
 124
 125     smc_debug("DATA Write B: %#x = %#x\n", addr, val);
 126     switch(s->cmd) {
 127         case APPLESMC_READ_CMD:
 128             if(s->read_pos < 4) {
 129                 s->key[s->read_pos] = val;
 130                 s->status = 0x04;
 131             } else if(s->read_pos == 4) {
 132                 s->data_len = val;
 133                 s->status = 0x05;
 134                 s->data_pos = 0;
 135                 smc_debug("Key = %c%c%c%c Len = %d\n", s->key[0],
 136                           s->key[1], s->key[2], s->key[3], val);
 137                 applesmc_fill_data(s);
 138             }
 139             s->read_pos++;
 140             break;
 141     }
 142 }
 143
 144 static uint64_t applesmc_io_data_read(void *opaque, hwaddr addr1,
 145                                       unsigned size)
 146 {
 147     AppleSMCState *s = opaque;
 148     uint8_t retval = 0;
 149
 150     switch(s->cmd) {
 151         case APPLESMC_READ_CMD:
 152             if(s->data_pos < s->data_len) {
 153                 retval = s->data[s->data_pos];
 154                 smc_debug("READ_DATA[%d] = %#hhx\n", s->data_pos,
 155                           retval);
 156                 s->data_pos++;
 157                 if(s->data_pos == s->data_len) {
 158                     s->status = 0x00;
 159                     smc_debug("EOF\n");
 160                 } else
 161                     s->status = 0x05;
 162             }
 163     }
 164     smc_debug("DATA Read b: %#x = %#x\n", addr1, retval);
 165
 166     return retval;
 167 }
 168
 169 static uint64_t applesmc_io_cmd_read(void *opaque, hwaddr addr1, unsigned size)
 170 {
 171     AppleSMCState *s = opaque;
 172
 173     smc_debug("CMD Read B: %#x\n", addr1);
 174     return s->status;
 175 }
 176
 177 static void applesmc_add_key(AppleSMCState *s, const char *key,
 178                              int len, const char *data)
 179 {
 180     struct AppleSMCData *def;
 181
 182     def = g_malloc0(sizeof(struct AppleSMCData));
 183     def->key = key;
 184     def->len = len;
 185     def->data = data;
 186
 187     QLIST_INSERT_HEAD(&s->data_def, def, node);
 188 }
 189
 190 static void qdev_applesmc_isa_reset(DeviceState *dev)
 191 {
 192     AppleSMCState *s = APPLE_SMC(dev);
 193     struct AppleSMCData *d, *next;
 194
 195     /* Remove existing entries */
 196     QLIST_FOREACH_SAFE(d, &s->data_def, node, next) {
 197         QLIST_REMOVE(d, node);
 198     }
 199
 200     applesmc_add_key(s, "REV ", 6, "\x01\x13\x0f\x00\x00\x03");
 201     applesmc_add_key(s, "OSK0", 32, s->osk);
 202     applesmc_add_key(s, "OSK1", 32, s->osk + 32);
 203     applesmc_add_key(s, "NATJ", 1, "\0");
 204     applesmc_add_key(s, "MSSP", 1, "\0");
 205     applesmc_add_key(s, "MSSD", 1, "\0x3");
 206 }
 207
 208 static const MemoryRegionOps applesmc_data_io_ops = {
 209     .write = applesmc_io_data_write,
 210     .read = applesmc_io_data_read,
 211     .endianness = DEVICE_NATIVE_ENDIAN,
 212     .impl = {
 213         .min_access_size = 1,
 214         .max_access_size = 1,
 215     },
 216 };
 217
 218 static const MemoryRegionOps applesmc_cmd_io_ops = {
 219     .write = applesmc_io_cmd_write,
 220     .read = applesmc_io_cmd_read,
 221     .endianness = DEVICE_NATIVE_ENDIAN,
 222     .impl = {
 223         .min_access_size = 1,
 224         .max_access_size = 1,
 225     },
 226 };
 227
 228 static void applesmc_isa_realize(DeviceState *dev, Error **errp)
 229 {
 230     AppleSMCState *s = APPLE_SMC(dev);
 231
 232     memory_region_init_io(&s->io_data, OBJECT(s), &applesmc_data_io_ops, s,
 233                           "applesmc-data", 4);
 234     isa_register_ioport(&s->parent_obj, &s->io_data,
 235                         s->iobase + APPLESMC_DATA_PORT);
 236
 237     memory_region_init_io(&s->io_cmd, OBJECT(s), &applesmc_cmd_io_ops, s,
 238                           "applesmc-cmd", 4);
 239     isa_register_ioport(&s->parent_obj, &s->io_cmd,
 240                         s->iobase + APPLESMC_CMD_PORT);
 241
 242     if (!s->osk || (strlen(s->osk) != 64)) {
 243         fprintf(stderr, "WARNING: Using AppleSMC with invalid key\n");
 244         s->osk = default_osk;
 245     }
 246
 247     QLIST_INIT(&s->data_def);
 248     qdev_applesmc_isa_reset(dev);
 249 }
 250
 251 static Property applesmc_isa_properties[] = {
 252     DEFINE_PROP_UINT32(APPLESMC_PROP_IO_BASE, AppleSMCState, iobase,
 253                        APPLESMC_DEFAULT_IOBASE),
 254     DEFINE_PROP_STRING("osk", AppleSMCState, osk),
 255     DEFINE_PROP_END_OF_LIST(),
 256 };
 257
 258 static void qdev_applesmc_class_init(ObjectClass *klass, void *data)
 259 {
 260     DeviceClass *dc = DEVICE_CLASS(klass);
 261
 262     dc->realize = applesmc_isa_realize;
 263     dc->reset = qdev_applesmc_isa_reset;
 264     dc->props = applesmc_isa_properties;
 265     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 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)