root/drivers/ps3/ps3-sys-manager.c

DEFINITIONS

1. _dump_sm_header
2. ps3_sys_manager_write
3. ps3_sys_manager_send_attr
4. ps3_sys_manager_send_next_op
5. ps3_sys_manager_send_request_shutdown
6. ps3_sys_manager_send_response
7. ps3_sys_manager_handle_event
8. ps3_sys_manager_handle_cmd
9. ps3_sys_manager_handle_msg
10. ps3_sys_manager_fin
11. ps3_sys_manager_final_power_off
12. ps3_sys_manager_final_restart
13. ps3_sys_manager_get_wol
14. ps3_sys_manager_set_wol
15. ps3_sys_manager_work
16. ps3_sys_manager_probe
17. ps3_sys_manager_remove
18. ps3_sys_manager_shutdown
19. ps3_sys_manager_init

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  PS3 System Manager.
   4  *
   5  *  Copyright (C) 2007 Sony Computer Entertainment Inc.
   6  *  Copyright 2007 Sony Corp.
   7  */
   8 
   9 #include <linux/kernel.h>
  10 #include <linux/module.h>
  11 #include <linux/workqueue.h>
  12 #include <linux/reboot.h>
  13 #include <linux/sched/signal.h>
  14 
  15 #include <asm/firmware.h>
  16 #include <asm/lv1call.h>
  17 #include <asm/ps3.h>
  18 
  19 #include "vuart.h"
  20 
  21 /**
  22  * ps3_sys_manager - PS3 system manager driver.
  23  *
  24  * The system manager provides an asynchronous system event notification
  25  * mechanism for reporting events like thermal alert and button presses to
  26  * guests.  It also provides support to control system shutdown and startup.
  27  *
  28  * The actual system manager is implemented as an application running in the
  29  * system policy module in lpar_1.  Guests communicate with the system manager
  30  * through port 2 of the vuart using a simple packet message protocol.
  31  * Messages are comprised of a fixed field header followed by a message
  32  * specific payload.
  33  */
  34 
  35 /**
  36  * struct ps3_sys_manager_header - System manager message header.
  37  * @version: Header version, currently 1.
  38  * @size: Header size in bytes, currently 16.
  39  * @payload_size: Message payload size in bytes.
  40  * @service_id: Message type, one of enum ps3_sys_manager_service_id.
  41  * @request_tag: Unique number to identify reply.
  42  */
  43 
  44 struct ps3_sys_manager_header {
  45         /* version 1 */
  46         u8 version;
  47         u8 size;
  48         u16 reserved_1;
  49         u32 payload_size;
  50         u16 service_id;
  51         u16 reserved_2;
  52         u32 request_tag;
  53 };
  54 
  55 #define dump_sm_header(_h) _dump_sm_header(_h, __func__, __LINE__)
  56 static void __maybe_unused _dump_sm_header(
  57         const struct ps3_sys_manager_header *h, const char *func, int line)
  58 {
  59         pr_debug("%s:%d: version:      %xh\n", func, line, h->version);
  60         pr_debug("%s:%d: size:         %xh\n", func, line, h->size);
  61         pr_debug("%s:%d: payload_size: %xh\n", func, line, h->payload_size);
  62         pr_debug("%s:%d: service_id:   %xh\n", func, line, h->service_id);
  63         pr_debug("%s:%d: request_tag:  %xh\n", func, line, h->request_tag);
  64 }
  65 
  66 /**
  67  * @PS3_SM_RX_MSG_LEN_MIN - Shortest received message length.
  68  * @PS3_SM_RX_MSG_LEN_MAX - Longest received message length.
  69  *
  70  * Currently all messages received from the system manager are either
  71  * (16 bytes header + 8 bytes payload = 24 bytes) or (16 bytes header
  72  * + 16 bytes payload = 32 bytes).  This knowledge is used to simplify
  73  * the logic.
  74  */
  75 
  76 enum {
  77         PS3_SM_RX_MSG_LEN_MIN = 24,
  78         PS3_SM_RX_MSG_LEN_MAX = 32,
  79 };
  80 
  81 /**
  82  * enum ps3_sys_manager_service_id - Message header service_id.
  83  * @PS3_SM_SERVICE_ID_REQUEST:       guest --> sys_manager.
  84  * @PS3_SM_SERVICE_ID_REQUEST_ERROR: guest <-- sys_manager.
  85  * @PS3_SM_SERVICE_ID_COMMAND:       guest <-- sys_manager.
  86  * @PS3_SM_SERVICE_ID_RESPONSE:      guest --> sys_manager.
  87  * @PS3_SM_SERVICE_ID_SET_ATTR:      guest --> sys_manager.
  88  * @PS3_SM_SERVICE_ID_EXTERN_EVENT:  guest <-- sys_manager.
  89  * @PS3_SM_SERVICE_ID_SET_NEXT_OP:   guest --> sys_manager.
  90  *
  91  * PS3_SM_SERVICE_ID_REQUEST_ERROR is returned for invalid data values in a
  92  * a PS3_SM_SERVICE_ID_REQUEST message.  It also seems to be returned when
  93  * a REQUEST message is sent at the wrong time.
  94  */
  95 
  96 enum ps3_sys_manager_service_id {
  97         /* version 1 */
  98         PS3_SM_SERVICE_ID_REQUEST = 1,
  99         PS3_SM_SERVICE_ID_RESPONSE = 2,
 100         PS3_SM_SERVICE_ID_COMMAND = 3,
 101         PS3_SM_SERVICE_ID_EXTERN_EVENT = 4,
 102         PS3_SM_SERVICE_ID_SET_NEXT_OP = 5,
 103         PS3_SM_SERVICE_ID_REQUEST_ERROR = 6,
 104         PS3_SM_SERVICE_ID_SET_ATTR = 8,
 105 };
 106 
 107 /**
 108  * enum ps3_sys_manager_attr - Notification attribute (bit position mask).
 109  * @PS3_SM_ATTR_POWER: Power button.
 110  * @PS3_SM_ATTR_RESET: Reset button, not available on retail console.
 111  * @PS3_SM_ATTR_THERMAL: System thermal alert.
 112  * @PS3_SM_ATTR_CONTROLLER: Remote controller event.
 113  * @PS3_SM_ATTR_ALL: Logical OR of all.
 114  *
 115  * The guest tells the system manager which events it is interested in receiving
 116  * notice of by sending the system manager a logical OR of notification
 117  * attributes via the ps3_sys_manager_send_attr() routine.
 118  */
 119 
 120 enum ps3_sys_manager_attr {
 121         /* version 1 */
 122         PS3_SM_ATTR_POWER = 1,
 123         PS3_SM_ATTR_RESET = 2,
 124         PS3_SM_ATTR_THERMAL = 4,
 125         PS3_SM_ATTR_CONTROLLER = 8, /* bogus? */
 126         PS3_SM_ATTR_ALL = 0x0f,
 127 };
 128 
 129 /**
 130  * enum ps3_sys_manager_event - External event type, reported by system manager.
 131  * @PS3_SM_EVENT_POWER_PRESSED: payload.value =
 132  *  enum ps3_sys_manager_button_event.
 133  * @PS3_SM_EVENT_POWER_RELEASED: payload.value = time pressed in millisec.
 134  * @PS3_SM_EVENT_RESET_PRESSED: payload.value =
 135  *  enum ps3_sys_manager_button_event.
 136  * @PS3_SM_EVENT_RESET_RELEASED: payload.value = time pressed in millisec.
 137  * @PS3_SM_EVENT_THERMAL_ALERT: payload.value = thermal zone id.
 138  * @PS3_SM_EVENT_THERMAL_CLEARED: payload.value = thermal zone id.
 139  */
 140 
 141 enum ps3_sys_manager_event {
 142         /* version 1 */
 143         PS3_SM_EVENT_POWER_PRESSED = 3,
 144         PS3_SM_EVENT_POWER_RELEASED = 4,
 145         PS3_SM_EVENT_RESET_PRESSED = 5,
 146         PS3_SM_EVENT_RESET_RELEASED = 6,
 147         PS3_SM_EVENT_THERMAL_ALERT = 7,
 148         PS3_SM_EVENT_THERMAL_CLEARED = 8,
 149         /* no info on controller events */
 150 };
 151 
 152 /**
 153  * enum ps3_sys_manager_button_event - Button event payload values.
 154  * @PS3_SM_BUTTON_EVENT_HARD: Hardware generated event.
 155  * @PS3_SM_BUTTON_EVENT_SOFT: Software generated event.
 156  */
 157 
 158 enum ps3_sys_manager_button_event {
 159         PS3_SM_BUTTON_EVENT_HARD = 0,
 160         PS3_SM_BUTTON_EVENT_SOFT = 1,
 161 };
 162 
 163 /**
 164  * enum ps3_sys_manager_next_op - Operation to perform after lpar is destroyed.
 165  */
 166 
 167 enum ps3_sys_manager_next_op {
 168         /* version 3 */
 169         PS3_SM_NEXT_OP_SYS_SHUTDOWN = 1,
 170         PS3_SM_NEXT_OP_SYS_REBOOT = 2,
 171         PS3_SM_NEXT_OP_LPAR_REBOOT = 0x82,
 172 };
 173 
 174 /**
 175  * enum ps3_sys_manager_wake_source - Next-op wakeup source (bit position mask).
 176  * @PS3_SM_WAKE_DEFAULT: Disk insert, power button, eject button.
 177  * @PS3_SM_WAKE_W_O_L: Ether or wireless LAN.
 178  * @PS3_SM_WAKE_P_O_R: Power on reset.
 179  *
 180  * Additional wakeup sources when specifying PS3_SM_NEXT_OP_SYS_SHUTDOWN.
 181  * The system will always wake from the PS3_SM_WAKE_DEFAULT sources.
 182  * Sources listed here are the only ones available to guests in the
 183  * other-os lpar.
 184  */
 185 
 186 enum ps3_sys_manager_wake_source {
 187         /* version 3 */
 188         PS3_SM_WAKE_DEFAULT   = 0,
 189         PS3_SM_WAKE_W_O_L     = 0x00000400,
 190         PS3_SM_WAKE_P_O_R     = 0x80000000,
 191 };
 192 
 193 /**
 194  * user_wake_sources - User specified wakeup sources.
 195  *
 196  * Logical OR of enum ps3_sys_manager_wake_source types.
 197  */
 198 
 199 static u32 user_wake_sources = PS3_SM_WAKE_DEFAULT;
 200 
 201 /**
 202  * enum ps3_sys_manager_cmd - Command from system manager to guest.
 203  *
 204  * The guest completes the actions needed, then acks or naks the command via
 205  * ps3_sys_manager_send_response().  In the case of @PS3_SM_CMD_SHUTDOWN,
 206  * the guest must be fully prepared for a system poweroff prior to acking the
 207  * command.
 208  */
 209 
 210 enum ps3_sys_manager_cmd {
 211         /* version 1 */
 212         PS3_SM_CMD_SHUTDOWN = 1, /* shutdown guest OS */
 213 };
 214 
 215 /**
 216  * ps3_sm_force_power_off - Poweroff helper.
 217  *
 218  * A global variable used to force a poweroff when the power button has
 219  * been pressed irrespective of how init handles the ctrl_alt_del signal.
 220  *
 221  */
 222 
 223 static unsigned int ps3_sm_force_power_off;
 224 
 225 /**
 226  * ps3_sys_manager_write - Helper to write a two part message to the vuart.
 227  *
 228  */
 229 
 230 static int ps3_sys_manager_write(struct ps3_system_bus_device *dev,
 231         const struct ps3_sys_manager_header *header, const void *payload)
 232 {
 233         int result;
 234 
 235         BUG_ON(header->version != 1);
 236         BUG_ON(header->size != 16);
 237         BUG_ON(header->payload_size != 8 && header->payload_size != 16);
 238         BUG_ON(header->service_id > 8);
 239 
 240         result = ps3_vuart_write(dev, header,
 241                 sizeof(struct ps3_sys_manager_header));
 242 
 243         if (!result)
 244                 result = ps3_vuart_write(dev, payload, header->payload_size);
 245 
 246         return result;
 247 }
 248 
 249 /**
 250  * ps3_sys_manager_send_attr - Send a 'set attribute' to the system manager.
 251  *
 252  */
 253 
 254 static int ps3_sys_manager_send_attr(struct ps3_system_bus_device *dev,
 255         enum ps3_sys_manager_attr attr)
 256 {
 257         struct ps3_sys_manager_header header;
 258         struct {
 259                 u8 version;
 260                 u8 reserved_1[3];
 261                 u32 attribute;
 262         } payload;
 263 
 264         BUILD_BUG_ON(sizeof(payload) != 8);
 265 
 266         dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, attr);
 267 
 268         memset(&header, 0, sizeof(header));
 269         header.version = 1;
 270         header.size = 16;
 271         header.payload_size = 16;
 272         header.service_id = PS3_SM_SERVICE_ID_SET_ATTR;
 273 
 274         memset(&payload, 0, sizeof(payload));
 275         payload.version = 1;
 276         payload.attribute = attr;
 277 
 278         return ps3_sys_manager_write(dev, &header, &payload);
 279 }
 280 
 281 /**
 282  * ps3_sys_manager_send_next_op - Send a 'set next op' to the system manager.
 283  *
 284  * Tell the system manager what to do after this lpar is destroyed.
 285  */
 286 
 287 static int ps3_sys_manager_send_next_op(struct ps3_system_bus_device *dev,
 288         enum ps3_sys_manager_next_op op,
 289         enum ps3_sys_manager_wake_source wake_source)
 290 {
 291         struct ps3_sys_manager_header header;
 292         struct {
 293                 u8 version;
 294                 u8 type;
 295                 u8 gos_id;
 296                 u8 reserved_1;
 297                 u32 wake_source;
 298                 u8 reserved_2[8];
 299         } payload;
 300 
 301         BUILD_BUG_ON(sizeof(payload) != 16);
 302 
 303         dev_dbg(&dev->core, "%s:%d: (%xh)\n", __func__, __LINE__, op);
 304 
 305         memset(&header, 0, sizeof(header));
 306         header.version = 1;
 307         header.size = 16;
 308         header.payload_size = 16;
 309         header.service_id = PS3_SM_SERVICE_ID_SET_NEXT_OP;
 310 
 311         memset(&payload, 0, sizeof(payload));
 312         payload.version = 3;
 313         payload.type = op;
 314         payload.gos_id = 3; /* other os */
 315         payload.wake_source = wake_source;
 316 
 317         return ps3_sys_manager_write(dev, &header, &payload);
 318 }
 319 
 320 /**
 321  * ps3_sys_manager_send_request_shutdown - Send 'request' to the system manager.
 322  *
 323  * The guest sends this message to request an operation or action of the system
 324  * manager.  The reply is a command message from the system manager.  In the
 325  * command handler the guest performs the requested operation.  The result of
 326  * the command is then communicated back to the system manager with a response
 327  * message.
 328  *
 329  * Currently, the only supported request is the 'shutdown self' request.
 330  */
 331 
 332 static int ps3_sys_manager_send_request_shutdown(
 333         struct ps3_system_bus_device *dev)
 334 {
 335         struct ps3_sys_manager_header header;
 336         struct {
 337                 u8 version;
 338                 u8 type;
 339                 u8 gos_id;
 340                 u8 reserved_1[13];
 341         } payload;
 342 
 343         BUILD_BUG_ON(sizeof(payload) != 16);
 344 
 345         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 346 
 347         memset(&header, 0, sizeof(header));
 348         header.version = 1;
 349         header.size = 16;
 350         header.payload_size = 16;
 351         header.service_id = PS3_SM_SERVICE_ID_REQUEST;
 352 
 353         memset(&payload, 0, sizeof(payload));
 354         payload.version = 1;
 355         payload.type = 1; /* shutdown */
 356         payload.gos_id = 0; /* self */
 357 
 358         return ps3_sys_manager_write(dev, &header, &payload);
 359 }
 360 
 361 /**
 362  * ps3_sys_manager_send_response - Send a 'response' to the system manager.
 363  * @status: zero = success, others fail.
 364  *
 365  * The guest sends this message to the system manager to acnowledge success or
 366  * failure of a command sent by the system manager.
 367  */
 368 
 369 static int ps3_sys_manager_send_response(struct ps3_system_bus_device *dev,
 370         u64 status)
 371 {
 372         struct ps3_sys_manager_header header;
 373         struct {
 374                 u8 version;
 375                 u8 reserved_1[3];
 376                 u8 status;
 377                 u8 reserved_2[11];
 378         } payload;
 379 
 380         BUILD_BUG_ON(sizeof(payload) != 16);
 381 
 382         dev_dbg(&dev->core, "%s:%d: (%s)\n", __func__, __LINE__,
 383                 (status ? "nak" : "ack"));
 384 
 385         memset(&header, 0, sizeof(header));
 386         header.version = 1;
 387         header.size = 16;
 388         header.payload_size = 16;
 389         header.service_id = PS3_SM_SERVICE_ID_RESPONSE;
 390 
 391         memset(&payload, 0, sizeof(payload));
 392         payload.version = 1;
 393         payload.status = status;
 394 
 395         return ps3_sys_manager_write(dev, &header, &payload);
 396 }
 397 
 398 /**
 399  * ps3_sys_manager_handle_event - Second stage event msg handler.
 400  *
 401  */
 402 
 403 static int ps3_sys_manager_handle_event(struct ps3_system_bus_device *dev)
 404 {
 405         int result;
 406         struct {
 407                 u8 version;
 408                 u8 type;
 409                 u8 reserved_1[2];
 410                 u32 value;
 411                 u8 reserved_2[8];
 412         } event;
 413 
 414         BUILD_BUG_ON(sizeof(event) != 16);
 415 
 416         result = ps3_vuart_read(dev, &event, sizeof(event));
 417         BUG_ON(result && "need to retry here");
 418 
 419         if (event.version != 1) {
 420                 dev_dbg(&dev->core, "%s:%d: unsupported event version (%u)\n",
 421                         __func__, __LINE__, event.version);
 422                 return -EIO;
 423         }
 424 
 425         switch (event.type) {
 426         case PS3_SM_EVENT_POWER_PRESSED:
 427                 dev_dbg(&dev->core, "%s:%d: POWER_PRESSED (%s)\n",
 428                         __func__, __LINE__,
 429                         (event.value == PS3_SM_BUTTON_EVENT_SOFT ? "soft"
 430                         : "hard"));
 431                 ps3_sm_force_power_off = 1;
 432                 /*
 433                  * A memory barrier is use here to sync memory since
 434                  * ps3_sys_manager_final_restart() could be called on
 435                  * another cpu.
 436                  */
 437                 wmb();
 438                 kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */
 439                 break;
 440         case PS3_SM_EVENT_POWER_RELEASED:
 441                 dev_dbg(&dev->core, "%s:%d: POWER_RELEASED (%u ms)\n",
 442                         __func__, __LINE__, event.value);
 443                 break;
 444         case PS3_SM_EVENT_RESET_PRESSED:
 445                 dev_dbg(&dev->core, "%s:%d: RESET_PRESSED (%s)\n",
 446                         __func__, __LINE__,
 447                         (event.value == PS3_SM_BUTTON_EVENT_SOFT ? "soft"
 448                         : "hard"));
 449                 ps3_sm_force_power_off = 0;
 450                 /*
 451                  * A memory barrier is use here to sync memory since
 452                  * ps3_sys_manager_final_restart() could be called on
 453                  * another cpu.
 454                  */
 455                 wmb();
 456                 kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */
 457                 break;
 458         case PS3_SM_EVENT_RESET_RELEASED:
 459                 dev_dbg(&dev->core, "%s:%d: RESET_RELEASED (%u ms)\n",
 460                         __func__, __LINE__, event.value);
 461                 break;
 462         case PS3_SM_EVENT_THERMAL_ALERT:
 463                 dev_dbg(&dev->core, "%s:%d: THERMAL_ALERT (zone %u)\n",
 464                         __func__, __LINE__, event.value);
 465                 pr_info("PS3 Thermal Alert Zone %u\n", event.value);
 466                 break;
 467         case PS3_SM_EVENT_THERMAL_CLEARED:
 468                 dev_dbg(&dev->core, "%s:%d: THERMAL_CLEARED (zone %u)\n",
 469                         __func__, __LINE__, event.value);
 470                 break;
 471         default:
 472                 dev_dbg(&dev->core, "%s:%d: unknown event (%u)\n",
 473                         __func__, __LINE__, event.type);
 474                 return -EIO;
 475         }
 476 
 477         return 0;
 478 }
 479 /**
 480  * ps3_sys_manager_handle_cmd - Second stage command msg handler.
 481  *
 482  * The system manager sends this in reply to a 'request' message from the guest.
 483  */
 484 
 485 static int ps3_sys_manager_handle_cmd(struct ps3_system_bus_device *dev)
 486 {
 487         int result;
 488         struct {
 489                 u8 version;
 490                 u8 type;
 491                 u8 reserved_1[14];
 492         } cmd;
 493 
 494         BUILD_BUG_ON(sizeof(cmd) != 16);
 495 
 496         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 497 
 498         result = ps3_vuart_read(dev, &cmd, sizeof(cmd));
 499         BUG_ON(result && "need to retry here");
 500 
 501         if (result)
 502                 return result;
 503 
 504         if (cmd.version != 1) {
 505                 dev_dbg(&dev->core, "%s:%d: unsupported cmd version (%u)\n",
 506                         __func__, __LINE__, cmd.version);
 507                 return -EIO;
 508         }
 509 
 510         if (cmd.type != PS3_SM_CMD_SHUTDOWN) {
 511                 dev_dbg(&dev->core, "%s:%d: unknown cmd (%u)\n",
 512                         __func__, __LINE__, cmd.type);
 513                 return -EIO;
 514         }
 515 
 516         ps3_sys_manager_send_response(dev, 0);
 517         return 0;
 518 }
 519 
 520 /**
 521  * ps3_sys_manager_handle_msg - First stage msg handler.
 522  *
 523  * Can be called directly to manually poll vuart and pump message handler.
 524  */
 525 
 526 static int ps3_sys_manager_handle_msg(struct ps3_system_bus_device *dev)
 527 {
 528         int result;
 529         struct ps3_sys_manager_header header;
 530 
 531         result = ps3_vuart_read(dev, &header,
 532                 sizeof(struct ps3_sys_manager_header));
 533 
 534         if (result)
 535                 return result;
 536 
 537         if (header.version != 1) {
 538                 dev_dbg(&dev->core, "%s:%d: unsupported header version (%u)\n",
 539                         __func__, __LINE__, header.version);
 540                 dump_sm_header(&header);
 541                 goto fail_header;
 542         }
 543 
 544         BUILD_BUG_ON(sizeof(header) != 16);
 545 
 546         if (header.size != 16 || (header.payload_size != 8
 547                 && header.payload_size != 16)) {
 548                 dump_sm_header(&header);
 549                 BUG();
 550         }
 551 
 552         switch (header.service_id) {
 553         case PS3_SM_SERVICE_ID_EXTERN_EVENT:
 554                 dev_dbg(&dev->core, "%s:%d: EVENT\n", __func__, __LINE__);
 555                 return ps3_sys_manager_handle_event(dev);
 556         case PS3_SM_SERVICE_ID_COMMAND:
 557                 dev_dbg(&dev->core, "%s:%d: COMMAND\n", __func__, __LINE__);
 558                 return ps3_sys_manager_handle_cmd(dev);
 559         case PS3_SM_SERVICE_ID_REQUEST_ERROR:
 560                 dev_dbg(&dev->core, "%s:%d: REQUEST_ERROR\n", __func__,
 561                         __LINE__);
 562                 dump_sm_header(&header);
 563                 break;
 564         default:
 565                 dev_dbg(&dev->core, "%s:%d: unknown service_id (%u)\n",
 566                         __func__, __LINE__, header.service_id);
 567                 break;
 568         }
 569         goto fail_id;
 570 
 571 fail_header:
 572         ps3_vuart_clear_rx_bytes(dev, 0);
 573         return -EIO;
 574 fail_id:
 575         ps3_vuart_clear_rx_bytes(dev, header.payload_size);
 576         return -EIO;
 577 }
 578 
 579 static void ps3_sys_manager_fin(struct ps3_system_bus_device *dev)
 580 {
 581         ps3_sys_manager_send_request_shutdown(dev);
 582 
 583         pr_emerg("System Halted, OK to turn off power\n");
 584 
 585         while (ps3_sys_manager_handle_msg(dev)) {
 586                 /* pause until next DEC interrupt */
 587                 lv1_pause(0);
 588         }
 589 
 590         while (1) {
 591                 /* pause, ignoring DEC interrupt */
 592                 lv1_pause(1);
 593         }
 594 }
 595 
 596 /**
 597  * ps3_sys_manager_final_power_off - The final platform machine_power_off routine.
 598  *
 599  * This routine never returns.  The routine disables asynchronous vuart reads
 600  * then spins calling ps3_sys_manager_handle_msg() to receive and acknowledge
 601  * the shutdown command sent from the system manager.  Soon after the
 602  * acknowledgement is sent the lpar is destroyed by the HV.  This routine
 603  * should only be called from ps3_power_off() through
 604  * ps3_sys_manager_ops.power_off.
 605  */
 606 
 607 static void ps3_sys_manager_final_power_off(struct ps3_system_bus_device *dev)
 608 {
 609         BUG_ON(!dev);
 610 
 611         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 612 
 613         ps3_vuart_cancel_async(dev);
 614 
 615         ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_SYS_SHUTDOWN,
 616                 user_wake_sources);
 617 
 618         ps3_sys_manager_fin(dev);
 619 }
 620 
 621 /**
 622  * ps3_sys_manager_final_restart - The final platform machine_restart routine.
 623  *
 624  * This routine never returns.  The routine disables asynchronous vuart reads
 625  * then spins calling ps3_sys_manager_handle_msg() to receive and acknowledge
 626  * the shutdown command sent from the system manager.  Soon after the
 627  * acknowledgement is sent the lpar is destroyed by the HV.  This routine
 628  * should only be called from ps3_restart() through ps3_sys_manager_ops.restart.
 629  */
 630 
 631 static void ps3_sys_manager_final_restart(struct ps3_system_bus_device *dev)
 632 {
 633         BUG_ON(!dev);
 634 
 635         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 636 
 637         /* Check if we got here via a power button event. */
 638 
 639         if (ps3_sm_force_power_off) {
 640                 dev_dbg(&dev->core, "%s:%d: forcing poweroff\n",
 641                         __func__, __LINE__);
 642                 ps3_sys_manager_final_power_off(dev);
 643         }
 644 
 645         ps3_vuart_cancel_async(dev);
 646 
 647         ps3_sys_manager_send_attr(dev, 0);
 648         ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_SYS_REBOOT,
 649                 user_wake_sources);
 650 
 651         ps3_sys_manager_fin(dev);
 652 }
 653 
 654 /**
 655  * ps3_sys_manager_get_wol - Get wake-on-lan setting.
 656  */
 657 
 658 int ps3_sys_manager_get_wol(void)
 659 {
 660         pr_debug("%s:%d\n", __func__, __LINE__);
 661 
 662         return (user_wake_sources & PS3_SM_WAKE_W_O_L) != 0;
 663 }
 664 EXPORT_SYMBOL_GPL(ps3_sys_manager_get_wol);
 665 
 666 /**
 667  * ps3_sys_manager_set_wol - Set wake-on-lan setting.
 668  */
 669 
 670 void ps3_sys_manager_set_wol(int state)
 671 {
 672         static DEFINE_MUTEX(mutex);
 673 
 674         mutex_lock(&mutex);
 675 
 676         pr_debug("%s:%d: %d\n", __func__, __LINE__, state);
 677 
 678         if (state)
 679                 user_wake_sources |= PS3_SM_WAKE_W_O_L;
 680         else
 681                 user_wake_sources &= ~PS3_SM_WAKE_W_O_L;
 682         mutex_unlock(&mutex);
 683 }
 684 EXPORT_SYMBOL_GPL(ps3_sys_manager_set_wol);
 685 
 686 /**
 687  * ps3_sys_manager_work - Asynchronous read handler.
 688  *
 689  * Signaled when PS3_SM_RX_MSG_LEN_MIN bytes arrive at the vuart port.
 690  */
 691 
 692 static void ps3_sys_manager_work(struct ps3_system_bus_device *dev)
 693 {
 694         ps3_sys_manager_handle_msg(dev);
 695         ps3_vuart_read_async(dev, PS3_SM_RX_MSG_LEN_MIN);
 696 }
 697 
 698 static int ps3_sys_manager_probe(struct ps3_system_bus_device *dev)
 699 {
 700         int result;
 701         struct ps3_sys_manager_ops ops;
 702 
 703         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 704 
 705         ops.power_off = ps3_sys_manager_final_power_off;
 706         ops.restart = ps3_sys_manager_final_restart;
 707         ops.dev = dev;
 708 
 709         /* ps3_sys_manager_register_ops copies ops. */
 710 
 711         ps3_sys_manager_register_ops(&ops);
 712 
 713         result = ps3_sys_manager_send_attr(dev, PS3_SM_ATTR_ALL);
 714         BUG_ON(result);
 715 
 716         result = ps3_vuart_read_async(dev, PS3_SM_RX_MSG_LEN_MIN);
 717         BUG_ON(result);
 718 
 719         return result;
 720 }
 721 
 722 static int ps3_sys_manager_remove(struct ps3_system_bus_device *dev)
 723 {
 724         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 725         return 0;
 726 }
 727 
 728 static void ps3_sys_manager_shutdown(struct ps3_system_bus_device *dev)
 729 {
 730         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 731 }
 732 
 733 static struct ps3_vuart_port_driver ps3_sys_manager = {
 734         .core.match_id = PS3_MATCH_ID_SYSTEM_MANAGER,
 735         .core.core.name = "ps3_sys_manager",
 736         .probe = ps3_sys_manager_probe,
 737         .remove = ps3_sys_manager_remove,
 738         .shutdown = ps3_sys_manager_shutdown,
 739         .work = ps3_sys_manager_work,
 740 };
 741 
 742 static int __init ps3_sys_manager_init(void)
 743 {
 744         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 745                 return -ENODEV;
 746 
 747         return ps3_vuart_port_driver_register(&ps3_sys_manager);
 748 }
 749 
 750 module_init(ps3_sys_manager_init);
 751 /* Module remove not supported. */
 752 
 753 MODULE_AUTHOR("Sony Corporation");
 754 MODULE_LICENSE("GPL v2");
 755 MODULE_DESCRIPTION("PS3 System Manager");
 756 MODULE_ALIAS(PS3_MODULE_ALIAS_SYSTEM_MANAGER);