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 43 enum { 44 APPLESMC_DATA_PORT = 0x00, 45 APPLESMC_CMD_PORT = 0x04, 46 APPLESMC_ERR_PORT = 0x1e, 47 APPLESMC_NUM_PORTS = 0x20, 48 }; 49 50 enum { 51 APPLESMC_READ_CMD = 0x10, 52 APPLESMC_WRITE_CMD = 0x11, 53 APPLESMC_GET_KEY_BY_INDEX_CMD = 0x12, 54 APPLESMC_GET_KEY_TYPE_CMD = 0x13, 55 }; 56 57 enum { 58 APPLESMC_ST_CMD_DONE = 0x00, 59 APPLESMC_ST_DATA_READY = 0x01, 60 APPLESMC_ST_BUSY = 0x02, 61 APPLESMC_ST_ACK = 0x04, 62 APPLESMC_ST_NEW_CMD = 0x08, 63 }; 64 65 enum { 66 APPLESMC_ST_1E_CMD_INTRUPTED = 0x80, 67 APPLESMC_ST_1E_STILL_BAD_CMD = 0x81, 68 APPLESMC_ST_1E_BAD_CMD = 0x82, 69 APPLESMC_ST_1E_NOEXIST = 0x84, 70 APPLESMC_ST_1E_WRITEONLY = 0x85, 71 APPLESMC_ST_1E_READONLY = 0x86, 72 APPLESMC_ST_1E_BAD_INDEX = 0xb8, 73 }; 74 75 #ifdef DEBUG_SMC 76 #define smc_debug(...) fprintf(stderr, "AppleSMC: " __VA_ARGS__) 77 #else 78 #define smc_debug(...) do { } while (0) 79 #endif 80 81 static char default_osk[64] = "This is a dummy key. Enter the real key " 82 "using the -osk parameter"; 83 84 struct AppleSMCData { 85 uint8_t len; 86 const char *key; 87 const char *data; 88 QLIST_ENTRY(AppleSMCData) node; 89 }; 90 91 #define APPLE_SMC(obj) OBJECT_CHECK(AppleSMCState, (obj), TYPE_APPLE_SMC) 92 93 typedef struct AppleSMCState AppleSMCState; 94 struct AppleSMCState { 95 ISADevice parent_obj; 96 97 MemoryRegion io_data; 98 MemoryRegion io_cmd; 99 MemoryRegion io_err; 100 uint32_t iobase; 101 uint8_t cmd; 102 uint8_t status; 103 uint8_t status_1e; 104 uint8_t last_ret; 105 char key[4]; 106 uint8_t read_pos; 107 uint8_t data_len; 108 uint8_t data_pos; 109 uint8_t data[255]; 110 char *osk; 111 QLIST_HEAD(, AppleSMCData) data_def; 112 }; 113 114 static void applesmc_io_cmd_write(void *opaque, hwaddr addr, uint64_t val, 115 unsigned size) 116 { 117 AppleSMCState *s = opaque; 118 uint8_t status = s->status & 0x0f; 119 120 smc_debug("CMD received: 0x%02x\n", (uint8_t)val); 121 switch (val) { 122 case APPLESMC_READ_CMD: 123 /* did last command run through OK? */ 124 if (status == APPLESMC_ST_CMD_DONE || status == APPLESMC_ST_NEW_CMD) { 125 s->cmd = val; 126 s->status = APPLESMC_ST_NEW_CMD | APPLESMC_ST_ACK; 127 } else { 128 smc_debug("ERROR: previous command interrupted!\n"); 129 s->status = APPLESMC_ST_NEW_CMD; 130 s->status_1e = APPLESMC_ST_1E_CMD_INTRUPTED; 131 } 132 break; 133 default: 134 smc_debug("UNEXPECTED CMD 0x%02x\n", (uint8_t)val); 135 s->status = APPLESMC_ST_NEW_CMD; 136 s->status_1e = APPLESMC_ST_1E_BAD_CMD; 137 } 138 s->read_pos = 0; 139 s->data_pos = 0; 140 } 141 142 static struct AppleSMCData *applesmc_find_key(AppleSMCState *s) 143 { 144 struct AppleSMCData *d; 145 146 QLIST_FOREACH(d, &s->data_def, node) { 147 if (!memcmp(d->key, s->key, 4)) { 148 return d; 149 } 150 } 151 return NULL; 152 } 153 154 static void applesmc_io_data_write(void *opaque, hwaddr addr, uint64_t val, 155 unsigned size) 156 { 157 AppleSMCState *s = opaque; 158 struct AppleSMCData *d; 159 160 smc_debug("DATA received: 0x%02x\n", (uint8_t)val); 161 switch (s->cmd) { 162 case APPLESMC_READ_CMD: 163 if ((s->status & 0x0f) == APPLESMC_ST_CMD_DONE) { 164 break; 165 } 166 if (s->read_pos < 4) { 167 s->key[s->read_pos] = val; 168 s->status = APPLESMC_ST_ACK; 169 } else if (s->read_pos == 4) { 170 d = applesmc_find_key(s); 171 if (d != NULL) { 172 memcpy(s->data, d->data, d->len); 173 s->data_len = d->len; 174 s->data_pos = 0; 175 s->status = APPLESMC_ST_ACK | APPLESMC_ST_DATA_READY; 176 s->status_1e = APPLESMC_ST_CMD_DONE; /* clear on valid key */ 177 } else { 178 smc_debug("READ_CMD: key '%c%c%c%c' not found!\n", 179 s->key[0], s->key[1], s->key[2], s->key[3]); 180 s->status = APPLESMC_ST_CMD_DONE; 181 s->status_1e = APPLESMC_ST_1E_NOEXIST; 182 } 183 } 184 s->read_pos++; 185 break; 186 default: 187 s->status = APPLESMC_ST_CMD_DONE; 188 s->status_1e = APPLESMC_ST_1E_STILL_BAD_CMD; 189 } 190 } 191 192 static void applesmc_io_err_write(void *opaque, hwaddr addr, uint64_t val, 193 unsigned size) 194 { 195 smc_debug("ERR_CODE received: 0x%02x, ignoring!\n", (uint8_t)val); 196 /* NOTE: writing to the error port not supported! */ 197 } 198 199 static uint64_t applesmc_io_data_read(void *opaque, hwaddr addr, unsigned size) 200 { 201 AppleSMCState *s = opaque; 202 203 switch (s->cmd) { 204 case APPLESMC_READ_CMD: 205 if (!(s->status & APPLESMC_ST_DATA_READY)) { 206 break; 207 } 208 if (s->data_pos < s->data_len) { 209 s->last_ret = s->data[s->data_pos]; 210 smc_debug("READ '%c%c%c%c'[%d] = %02x\n", 211 s->key[0], s->key[1], s->key[2], s->key[3], 212 s->data_pos, s->last_ret); 213 s->data_pos++; 214 if (s->data_pos == s->data_len) { 215 s->status = APPLESMC_ST_CMD_DONE; 216 smc_debug("READ '%c%c%c%c' Len=%d complete!\n", 217 s->key[0], s->key[1], s->key[2], s->key[3], 218 s->data_len); 219 } else { 220 s->status = APPLESMC_ST_ACK | APPLESMC_ST_DATA_READY; 221 } 222 } 223 break; 224 default: 225 s->status = APPLESMC_ST_CMD_DONE; 226 s->status_1e = APPLESMC_ST_1E_STILL_BAD_CMD; 227 } 228 smc_debug("DATA sent: 0x%02x\n", s->last_ret); 229 230 return s->last_ret; 231 } 232 233 static uint64_t applesmc_io_cmd_read(void *opaque, hwaddr addr, unsigned size) 234 { 235 AppleSMCState *s = opaque; 236 237 smc_debug("CMD sent: 0x%02x\n", s->status); 238 return s->status; 239 } 240 241 static uint64_t applesmc_io_err_read(void *opaque, hwaddr addr, unsigned size) 242 { 243 AppleSMCState *s = opaque; 244 245 /* NOTE: read does not clear the 1e status */ 246 smc_debug("ERR_CODE sent: 0x%02x\n", s->status_1e); 247 return s->status_1e; 248 } 249 250 static void applesmc_add_key(AppleSMCState *s, const char *key, 251 int len, const char *data) 252 { 253 struct AppleSMCData *def; 254 255 def = g_malloc0(sizeof(struct AppleSMCData)); 256 def->key = key; 257 def->len = len; 258 def->data = data; 259 260 QLIST_INSERT_HEAD(&s->data_def, def, node); 261 } 262 263 static void qdev_applesmc_isa_reset(DeviceState *dev) 264 { 265 AppleSMCState *s = APPLE_SMC(dev); 266 struct AppleSMCData *d, *next; 267 268 /* Remove existing entries */ 269 QLIST_FOREACH_SAFE(d, &s->data_def, node, next) { 270 QLIST_REMOVE(d, node); 271 } 272 s->status = 0x00; 273 s->status_1e = 0x00; 274 s->last_ret = 0x00; 275 276 applesmc_add_key(s, "REV ", 6, "\x01\x13\x0f\x00\x00\x03"); 277 applesmc_add_key(s, "OSK0", 32, s->osk); 278 applesmc_add_key(s, "OSK1", 32, s->osk + 32); 279 applesmc_add_key(s, "NATJ", 1, "\0"); 280 applesmc_add_key(s, "MSSP", 1, "\0"); 281 applesmc_add_key(s, "MSSD", 1, "\0x3"); 282 } 283 284 static const MemoryRegionOps applesmc_data_io_ops = { 285 .write = applesmc_io_data_write, 286 .read = applesmc_io_data_read, 287 .endianness = DEVICE_NATIVE_ENDIAN, 288 .impl = { 289 .min_access_size = 1, 290 .max_access_size = 1, 291 }, 292 }; 293 294 static const MemoryRegionOps applesmc_cmd_io_ops = { 295 .write = applesmc_io_cmd_write, 296 .read = applesmc_io_cmd_read, 297 .endianness = DEVICE_NATIVE_ENDIAN, 298 .impl = { 299 .min_access_size = 1, 300 .max_access_size = 1, 301 }, 302 }; 303 304 static const MemoryRegionOps applesmc_err_io_ops = { 305 .write = applesmc_io_err_write, 306 .read = applesmc_io_err_read, 307 .endianness = DEVICE_NATIVE_ENDIAN, 308 .impl = { 309 .min_access_size = 1, 310 .max_access_size = 1, 311 }, 312 }; 313 314 static void applesmc_isa_realize(DeviceState *dev, Error **errp) 315 { 316 AppleSMCState *s = APPLE_SMC(dev); 317 318 memory_region_init_io(&s->io_data, OBJECT(s), &applesmc_data_io_ops, s, 319 "applesmc-data", 1); 320 isa_register_ioport(&s->parent_obj, &s->io_data, 321 s->iobase + APPLESMC_DATA_PORT); 322 323 memory_region_init_io(&s->io_cmd, OBJECT(s), &applesmc_cmd_io_ops, s, 324 "applesmc-cmd", 1); 325 isa_register_ioport(&s->parent_obj, &s->io_cmd, 326 s->iobase + APPLESMC_CMD_PORT); 327 328 memory_region_init_io(&s->io_err, OBJECT(s), &applesmc_err_io_ops, s, 329 "applesmc-err", 1); 330 isa_register_ioport(&s->parent_obj, &s->io_err, 331 s->iobase + APPLESMC_ERR_PORT); 332 333 if (!s->osk || (strlen(s->osk) != 64)) { 334 fprintf(stderr, "WARNING: Using AppleSMC with invalid key\n"); 335 s->osk = default_osk; 336 } 337 338 QLIST_INIT(&s->data_def); 339 qdev_applesmc_isa_reset(dev); 340 } 341 342 static Property applesmc_isa_properties[] = { 343 DEFINE_PROP_UINT32(APPLESMC_PROP_IO_BASE, AppleSMCState, iobase, 344 APPLESMC_DEFAULT_IOBASE), 345 DEFINE_PROP_STRING("osk", AppleSMCState, osk), 346 DEFINE_PROP_END_OF_LIST(), 347 }; 348 349 static void qdev_applesmc_class_init(ObjectClass *klass, void *data) 350 { 351 DeviceClass *dc = DEVICE_CLASS(klass); 352 353 dc->realize = applesmc_isa_realize; 354 dc->reset = qdev_applesmc_isa_reset; 355 dc->props = applesmc_isa_properties; 356 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 357 } 358 359 static const TypeInfo applesmc_isa_info = { 360 .name = TYPE_APPLE_SMC, 361 .parent = TYPE_ISA_DEVICE, 362 .instance_size = sizeof(AppleSMCState), 363 .class_init = qdev_applesmc_class_init, 364 }; 365 366 static void applesmc_register_types(void) 367 { 368 type_register_static(&applesmc_isa_info); 369 } 370 371 type_init(applesmc_register_types) 372