applesmc.c (12149B)
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 2.1 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/isa/isa.h" 35 #include "hw/qdev-properties.h" 36 #include "ui/console.h" 37 #include "qemu/module.h" 38 #include "qemu/timer.h" 39 #include "qom/object.h" 40 #include "hw/acpi/acpi_aml_interface.h" 41 42 /* #define DEBUG_SMC */ 43 44 #define APPLESMC_DEFAULT_IOBASE 0x300 45 #define TYPE_APPLE_SMC "isa-applesmc" 46 #define APPLESMC_MAX_DATA_LENGTH 32 47 #define APPLESMC_PROP_IO_BASE "iobase" 48 49 enum { 50 APPLESMC_DATA_PORT = 0x00, 51 APPLESMC_CMD_PORT = 0x04, 52 APPLESMC_ERR_PORT = 0x1e, 53 APPLESMC_NUM_PORTS = 0x20, 54 }; 55 56 enum { 57 APPLESMC_READ_CMD = 0x10, 58 APPLESMC_WRITE_CMD = 0x11, 59 APPLESMC_GET_KEY_BY_INDEX_CMD = 0x12, 60 APPLESMC_GET_KEY_TYPE_CMD = 0x13, 61 }; 62 63 enum { 64 APPLESMC_ST_CMD_DONE = 0x00, 65 APPLESMC_ST_DATA_READY = 0x01, 66 APPLESMC_ST_BUSY = 0x02, 67 APPLESMC_ST_ACK = 0x04, 68 APPLESMC_ST_NEW_CMD = 0x08, 69 }; 70 71 enum { 72 APPLESMC_ST_1E_CMD_INTRUPTED = 0x80, 73 APPLESMC_ST_1E_STILL_BAD_CMD = 0x81, 74 APPLESMC_ST_1E_BAD_CMD = 0x82, 75 APPLESMC_ST_1E_NOEXIST = 0x84, 76 APPLESMC_ST_1E_WRITEONLY = 0x85, 77 APPLESMC_ST_1E_READONLY = 0x86, 78 APPLESMC_ST_1E_BAD_INDEX = 0xb8, 79 }; 80 81 #ifdef DEBUG_SMC 82 #define smc_debug(...) fprintf(stderr, "AppleSMC: " __VA_ARGS__) 83 #else 84 #define smc_debug(...) do { } while (0) 85 #endif 86 87 static char default_osk[64] = "This is a dummy key. Enter the real key " 88 "using the -osk parameter"; 89 90 struct AppleSMCData { 91 uint8_t len; 92 const char *key; 93 const char *data; 94 QLIST_ENTRY(AppleSMCData) node; 95 }; 96 97 OBJECT_DECLARE_SIMPLE_TYPE(AppleSMCState, APPLE_SMC) 98 99 struct AppleSMCState { 100 ISADevice parent_obj; 101 102 MemoryRegion io_data; 103 MemoryRegion io_cmd; 104 MemoryRegion io_err; 105 uint32_t iobase; 106 uint8_t cmd; 107 uint8_t status; 108 uint8_t status_1e; 109 uint8_t last_ret; 110 char key[4]; 111 uint8_t read_pos; 112 uint8_t data_len; 113 uint8_t data_pos; 114 uint8_t data[255]; 115 char *osk; 116 QLIST_HEAD(, AppleSMCData) data_def; 117 }; 118 119 static void applesmc_io_cmd_write(void *opaque, hwaddr addr, uint64_t val, 120 unsigned size) 121 { 122 AppleSMCState *s = opaque; 123 uint8_t status = s->status & 0x0f; 124 125 smc_debug("CMD received: 0x%02x\n", (uint8_t)val); 126 switch (val) { 127 case APPLESMC_READ_CMD: 128 /* did last command run through OK? */ 129 if (status == APPLESMC_ST_CMD_DONE || status == APPLESMC_ST_NEW_CMD) { 130 s->cmd = val; 131 s->status = APPLESMC_ST_NEW_CMD | APPLESMC_ST_ACK; 132 } else { 133 smc_debug("ERROR: previous command interrupted!\n"); 134 s->status = APPLESMC_ST_NEW_CMD; 135 s->status_1e = APPLESMC_ST_1E_CMD_INTRUPTED; 136 } 137 break; 138 default: 139 smc_debug("UNEXPECTED CMD 0x%02x\n", (uint8_t)val); 140 s->status = APPLESMC_ST_NEW_CMD; 141 s->status_1e = APPLESMC_ST_1E_BAD_CMD; 142 } 143 s->read_pos = 0; 144 s->data_pos = 0; 145 } 146 147 static struct AppleSMCData *applesmc_find_key(AppleSMCState *s) 148 { 149 struct AppleSMCData *d; 150 151 QLIST_FOREACH(d, &s->data_def, node) { 152 if (!memcmp(d->key, s->key, 4)) { 153 return d; 154 } 155 } 156 return NULL; 157 } 158 159 static void applesmc_io_data_write(void *opaque, hwaddr addr, uint64_t val, 160 unsigned size) 161 { 162 AppleSMCState *s = opaque; 163 struct AppleSMCData *d; 164 165 smc_debug("DATA received: 0x%02x\n", (uint8_t)val); 166 switch (s->cmd) { 167 case APPLESMC_READ_CMD: 168 if ((s->status & 0x0f) == APPLESMC_ST_CMD_DONE) { 169 break; 170 } 171 if (s->read_pos < 4) { 172 s->key[s->read_pos] = val; 173 s->status = APPLESMC_ST_ACK; 174 } else if (s->read_pos == 4) { 175 d = applesmc_find_key(s); 176 if (d != NULL) { 177 memcpy(s->data, d->data, d->len); 178 s->data_len = d->len; 179 s->data_pos = 0; 180 s->status = APPLESMC_ST_ACK | APPLESMC_ST_DATA_READY; 181 s->status_1e = APPLESMC_ST_CMD_DONE; /* clear on valid key */ 182 } else { 183 smc_debug("READ_CMD: key '%c%c%c%c' not found!\n", 184 s->key[0], s->key[1], s->key[2], s->key[3]); 185 s->status = APPLESMC_ST_CMD_DONE; 186 s->status_1e = APPLESMC_ST_1E_NOEXIST; 187 } 188 } 189 s->read_pos++; 190 break; 191 default: 192 s->status = APPLESMC_ST_CMD_DONE; 193 s->status_1e = APPLESMC_ST_1E_STILL_BAD_CMD; 194 } 195 } 196 197 static void applesmc_io_err_write(void *opaque, hwaddr addr, uint64_t val, 198 unsigned size) 199 { 200 smc_debug("ERR_CODE received: 0x%02x, ignoring!\n", (uint8_t)val); 201 /* NOTE: writing to the error port not supported! */ 202 } 203 204 static uint64_t applesmc_io_data_read(void *opaque, hwaddr addr, unsigned size) 205 { 206 AppleSMCState *s = opaque; 207 208 switch (s->cmd) { 209 case APPLESMC_READ_CMD: 210 if (!(s->status & APPLESMC_ST_DATA_READY)) { 211 break; 212 } 213 if (s->data_pos < s->data_len) { 214 s->last_ret = s->data[s->data_pos]; 215 smc_debug("READ '%c%c%c%c'[%d] = %02x\n", 216 s->key[0], s->key[1], s->key[2], s->key[3], 217 s->data_pos, s->last_ret); 218 s->data_pos++; 219 if (s->data_pos == s->data_len) { 220 s->status = APPLESMC_ST_CMD_DONE; 221 smc_debug("READ '%c%c%c%c' Len=%d complete!\n", 222 s->key[0], s->key[1], s->key[2], s->key[3], 223 s->data_len); 224 } else { 225 s->status = APPLESMC_ST_ACK | APPLESMC_ST_DATA_READY; 226 } 227 } 228 break; 229 default: 230 s->status = APPLESMC_ST_CMD_DONE; 231 s->status_1e = APPLESMC_ST_1E_STILL_BAD_CMD; 232 } 233 smc_debug("DATA sent: 0x%02x\n", s->last_ret); 234 235 return s->last_ret; 236 } 237 238 static uint64_t applesmc_io_cmd_read(void *opaque, hwaddr addr, unsigned size) 239 { 240 AppleSMCState *s = opaque; 241 242 smc_debug("CMD sent: 0x%02x\n", s->status); 243 return s->status; 244 } 245 246 static uint64_t applesmc_io_err_read(void *opaque, hwaddr addr, unsigned size) 247 { 248 AppleSMCState *s = opaque; 249 250 /* NOTE: read does not clear the 1e status */ 251 smc_debug("ERR_CODE sent: 0x%02x\n", s->status_1e); 252 return s->status_1e; 253 } 254 255 static void applesmc_add_key(AppleSMCState *s, const char *key, 256 int len, const char *data) 257 { 258 struct AppleSMCData *def; 259 260 def = g_new0(struct AppleSMCData, 1); 261 def->key = key; 262 def->len = len; 263 def->data = data; 264 265 QLIST_INSERT_HEAD(&s->data_def, def, node); 266 } 267 268 static void qdev_applesmc_isa_reset(DeviceState *dev) 269 { 270 AppleSMCState *s = APPLE_SMC(dev); 271 struct AppleSMCData *d, *next; 272 273 /* Remove existing entries */ 274 QLIST_FOREACH_SAFE(d, &s->data_def, node, next) { 275 QLIST_REMOVE(d, node); 276 } 277 s->status = 0x00; 278 s->status_1e = 0x00; 279 s->last_ret = 0x00; 280 281 applesmc_add_key(s, "REV ", 6, "\x01\x13\x0f\x00\x00\x03"); 282 applesmc_add_key(s, "OSK0", 32, s->osk); 283 applesmc_add_key(s, "OSK1", 32, s->osk + 32); 284 applesmc_add_key(s, "NATJ", 1, "\0"); 285 applesmc_add_key(s, "MSSP", 1, "\0"); 286 applesmc_add_key(s, "MSSD", 1, "\0x3"); 287 } 288 289 static const MemoryRegionOps applesmc_data_io_ops = { 290 .write = applesmc_io_data_write, 291 .read = applesmc_io_data_read, 292 .endianness = DEVICE_NATIVE_ENDIAN, 293 .impl = { 294 .min_access_size = 1, 295 .max_access_size = 1, 296 }, 297 }; 298 299 static const MemoryRegionOps applesmc_cmd_io_ops = { 300 .write = applesmc_io_cmd_write, 301 .read = applesmc_io_cmd_read, 302 .endianness = DEVICE_NATIVE_ENDIAN, 303 .impl = { 304 .min_access_size = 1, 305 .max_access_size = 1, 306 }, 307 }; 308 309 static const MemoryRegionOps applesmc_err_io_ops = { 310 .write = applesmc_io_err_write, 311 .read = applesmc_io_err_read, 312 .endianness = DEVICE_NATIVE_ENDIAN, 313 .impl = { 314 .min_access_size = 1, 315 .max_access_size = 1, 316 }, 317 }; 318 319 static void applesmc_isa_realize(DeviceState *dev, Error **errp) 320 { 321 AppleSMCState *s = APPLE_SMC(dev); 322 323 memory_region_init_io(&s->io_data, OBJECT(s), &applesmc_data_io_ops, s, 324 "applesmc-data", 1); 325 isa_register_ioport(&s->parent_obj, &s->io_data, 326 s->iobase + APPLESMC_DATA_PORT); 327 328 memory_region_init_io(&s->io_cmd, OBJECT(s), &applesmc_cmd_io_ops, s, 329 "applesmc-cmd", 1); 330 isa_register_ioport(&s->parent_obj, &s->io_cmd, 331 s->iobase + APPLESMC_CMD_PORT); 332 333 memory_region_init_io(&s->io_err, OBJECT(s), &applesmc_err_io_ops, s, 334 "applesmc-err", 1); 335 isa_register_ioport(&s->parent_obj, &s->io_err, 336 s->iobase + APPLESMC_ERR_PORT); 337 338 if (!s->osk || (strlen(s->osk) != 64)) { 339 warn_report("Using AppleSMC with invalid key"); 340 s->osk = default_osk; 341 } 342 343 QLIST_INIT(&s->data_def); 344 qdev_applesmc_isa_reset(dev); 345 } 346 347 static Property applesmc_isa_properties[] = { 348 DEFINE_PROP_UINT32(APPLESMC_PROP_IO_BASE, AppleSMCState, iobase, 349 APPLESMC_DEFAULT_IOBASE), 350 DEFINE_PROP_STRING("osk", AppleSMCState, osk), 351 DEFINE_PROP_END_OF_LIST(), 352 }; 353 354 static void build_applesmc_aml(AcpiDevAmlIf *adev, Aml *scope) 355 { 356 Aml *crs; 357 AppleSMCState *s = APPLE_SMC(adev); 358 uint32_t iobase = s->iobase; 359 Aml *dev = aml_device("SMC"); 360 361 aml_append(dev, aml_name_decl("_HID", aml_eisaid("APP0001"))); 362 /* device present, functioning, decoding, not shown in UI */ 363 aml_append(dev, aml_name_decl("_STA", aml_int(0xB))); 364 crs = aml_resource_template(); 365 aml_append(crs, 366 aml_io(AML_DECODE16, iobase, iobase, 0x01, APPLESMC_MAX_DATA_LENGTH) 367 ); 368 aml_append(crs, aml_irq_no_flags(6)); 369 aml_append(dev, aml_name_decl("_CRS", crs)); 370 aml_append(scope, dev); 371 } 372 373 static void qdev_applesmc_class_init(ObjectClass *klass, void *data) 374 { 375 DeviceClass *dc = DEVICE_CLASS(klass); 376 AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass); 377 378 dc->realize = applesmc_isa_realize; 379 dc->reset = qdev_applesmc_isa_reset; 380 device_class_set_props(dc, applesmc_isa_properties); 381 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 382 adevc->build_dev_aml = build_applesmc_aml; 383 } 384 385 static const TypeInfo applesmc_isa_info = { 386 .name = TYPE_APPLE_SMC, 387 .parent = TYPE_ISA_DEVICE, 388 .instance_size = sizeof(AppleSMCState), 389 .class_init = qdev_applesmc_class_init, 390 .interfaces = (InterfaceInfo[]) { 391 { TYPE_ACPI_DEV_AML_IF }, 392 { }, 393 }, 394 }; 395 396 static void applesmc_register_types(void) 397 { 398 type_register_static(&applesmc_isa_info); 399 } 400 401 type_init(applesmc_register_types)