hw/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.h"
  34 #include "isa.h"
  35 #include "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 struct AppleSMCStatus {
  70     ISADevice dev;
  71     uint32_t iobase;
  72     uint8_t cmd;
  73     uint8_t status;
  74     uint8_t key[4];
  75     uint8_t read_pos;
  76     uint8_t data_len;
  77     uint8_t data_pos;
  78     uint8_t data[255];
  79     uint8_t charactic[4];
  80     char *osk;
  81     QLIST_HEAD(, AppleSMCData) data_def;
  82 };
  83
  84 static void applesmc_io_cmd_writeb(void *opaque, uint32_t addr, uint32_t val)
  85 {
  86     struct AppleSMCStatus *s = opaque;
  87
  88     smc_debug("CMD Write B: %#x = %#x\n", addr, val);
  89     switch(val) {
  90         case APPLESMC_READ_CMD:
  91             s->status = 0x0c;
  92             break;
  93     }
  94     s->cmd = val;
  95     s->read_pos = 0;
  96     s->data_pos = 0;
  97 }
  98
  99 static void applesmc_fill_data(struct AppleSMCStatus *s)
 100 {
 101     struct AppleSMCData *d;
 102
 103     QLIST_FOREACH(d, &s->data_def, node) {
 104         if (!memcmp(d->key, s->key, 4)) {
 105             smc_debug("Key matched (%s Len=%d Data=%s)\n", d->key,
 106                       d->len, d->data);
 107             memcpy(s->data, d->data, d->len);
 108             return;
 109         }
 110     }
 111 }
 112
 113 static void applesmc_io_data_writeb(void *opaque, uint32_t addr, uint32_t val)
 114 {
 115     struct AppleSMCStatus *s = opaque;
 116
 117     smc_debug("DATA Write B: %#x = %#x\n", addr, val);
 118     switch(s->cmd) {
 119         case APPLESMC_READ_CMD:
 120             if(s->read_pos < 4) {
 121                 s->key[s->read_pos] = val;
 122                 s->status = 0x04;
 123             } else if(s->read_pos == 4) {
 124                 s->data_len = val;
 125                 s->status = 0x05;
 126                 s->data_pos = 0;
 127                 smc_debug("Key = %c%c%c%c Len = %d\n", s->key[0],
 128                           s->key[1], s->key[2], s->key[3], val);
 129                 applesmc_fill_data(s);
 130             }
 131             s->read_pos++;
 132             break;
 133     }
 134 }
 135
 136 static uint32_t applesmc_io_data_readb(void *opaque, uint32_t addr1)
 137 {
 138     struct AppleSMCStatus *s = opaque;
 139     uint8_t retval = 0;
 140
 141     switch(s->cmd) {
 142         case APPLESMC_READ_CMD:
 143             if(s->data_pos < s->data_len) {
 144                 retval = s->data[s->data_pos];
 145                 smc_debug("READ_DATA[%d] = %#hhx\n", s->data_pos,
 146                           retval);
 147                 s->data_pos++;
 148                 if(s->data_pos == s->data_len) {
 149                     s->status = 0x00;
 150                     smc_debug("EOF\n");
 151                 } else
 152                     s->status = 0x05;
 153             }
 154     }
 155     smc_debug("DATA Read b: %#x = %#x\n", addr1, retval);
 156
 157     return retval;
 158 }
 159
 160 static uint32_t applesmc_io_cmd_readb(void *opaque, uint32_t addr1)
 161 {
 162     struct AppleSMCStatus *s = opaque;
 163
 164     smc_debug("CMD Read B: %#x\n", addr1);
 165     return s->status;
 166 }
 167
 168 static void applesmc_add_key(struct AppleSMCStatus *s, const char *key,
 169                              int len, const char *data)
 170 {
 171     struct AppleSMCData *def;
 172
 173     def = g_malloc0(sizeof(struct AppleSMCData));
 174     def->key = key;
 175     def->len = len;
 176     def->data = data;
 177
 178     QLIST_INSERT_HEAD(&s->data_def, def, node);
 179 }
 180
 181 static void qdev_applesmc_isa_reset(DeviceState *dev)
 182 {
 183     struct AppleSMCStatus *s = DO_UPCAST(struct AppleSMCStatus, dev.qdev, dev);
 184     struct AppleSMCData *d, *next;
 185
 186     /* Remove existing entries */
 187     QLIST_FOREACH_SAFE(d, &s->data_def, node, next) {
 188         QLIST_REMOVE(d, node);
 189     }
 190
 191     applesmc_add_key(s, "REV ", 6, "\x01\x13\x0f\x00\x00\x03");
 192     applesmc_add_key(s, "OSK0", 32, s->osk);
 193     applesmc_add_key(s, "OSK1", 32, s->osk + 32);
 194     applesmc_add_key(s, "NATJ", 1, "\0");
 195     applesmc_add_key(s, "MSSP", 1, "\0");
 196     applesmc_add_key(s, "MSSD", 1, "\0x3");
 197 }
 198
 199 static int applesmc_isa_init(ISADevice *dev)
 200 {
 201     struct AppleSMCStatus *s = DO_UPCAST(struct AppleSMCStatus, dev, dev);
 202
 203     register_ioport_read(s->iobase + APPLESMC_DATA_PORT, 4, 1,
 204                          applesmc_io_data_readb, s);
 205     register_ioport_read(s->iobase + APPLESMC_CMD_PORT, 4, 1,
 206                          applesmc_io_cmd_readb, s);
 207     register_ioport_write(s->iobase + APPLESMC_DATA_PORT, 4, 1,
 208                           applesmc_io_data_writeb, s);
 209     register_ioport_write(s->iobase + APPLESMC_CMD_PORT, 4, 1,
 210                           applesmc_io_cmd_writeb, s);
 211
 212     if (!s->osk || (strlen(s->osk) != 64)) {
 213         fprintf(stderr, "WARNING: Using AppleSMC with invalid key\n");
 214         s->osk = default_osk;
 215     }
 216
 217     QLIST_INIT(&s->data_def);
 218     qdev_applesmc_isa_reset(&dev->qdev);
 219
 220     return 0;
 221 }
 222
 223 static ISADeviceInfo applesmc_isa_info = {
 224     .qdev.name  = "isa-applesmc",
 225     .qdev.size  = sizeof(struct AppleSMCStatus),
 226     .qdev.reset = qdev_applesmc_isa_reset,
 227     .init       = applesmc_isa_init,
 228     .qdev.props = (Property[]) {
 229         DEFINE_PROP_HEX32("iobase", struct AppleSMCStatus, iobase,
 230                           APPLESMC_DEFAULT_IOBASE),
 231         DEFINE_PROP_STRING("osk", struct AppleSMCStatus, osk),
 232         DEFINE_PROP_END_OF_LIST(),
 233     },
 234 };
 235
 236 static void applesmc_register_devices(void)
 237 {
 238     isa_qdev_register(&applesmc_isa_info);
 239 }
 240
 241 device_init(applesmc_register_devices)