drivers/ps3/ps3-sys-manager.c

   1 /*
   2  *  PS3 System Manager.
   3  *
   4  *  Copyright (C) 2007 Sony Computer Entertainment Inc.
   5  *  Copyright 2007 Sony Corp.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; version 2 of the License.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/reboot.h>
  25
  26 #include <asm/firmware.h>
  27 #include <asm/lv1call.h>
  28 #include <asm/ps3.h>
  29
  30 #include "vuart.h"
  31
  32 /**
  33  * ps3_sys_manager - PS3 system manager driver.
  34  *
  35  * The system manager provides an asynchronous system event notification
  36  * mechanism for reporting events like thermal alert and button presses to
  37  * guests.  It also provides support to control system shutdown and startup.
  38  *
  39  * The actual system manager is implemented as an application running in the
  40  * system policy module in lpar_1.  Guests communicate with the system manager
  41  * through port 2 of the vuart using a simple packet message protocol.
  42  * Messages are comprised of a fixed field header followed by a message
  43  * specific payload.
  44  */
  45
  46 /**
  47  * struct ps3_sys_manager_header - System manager message header.
  48  * @version: Header version, currently 1.
  49  * @size: Header size in bytes, curently 16.
  50  * @payload_size: Message payload size in bytes.
  51  * @service_id: Message type, one of enum ps3_sys_manager_service_id.
  52  * @request_tag: Unique number to identify reply.
  53  */
  54
  55 struct ps3_sys_manager_header {
  56         /* version 1 */
  57         u8 version;
  58         u8 size;
  59         u16 reserved_1;
  60         u32 payload_size;
  61         u16 service_id;
  62         u16 reserved_2;
  63         u32 request_tag;
  64 };
  65
  66 #define dump_sm_header(_h) _dump_sm_header(_h, __func__, __LINE__)
  67 static void __maybe_unused _dump_sm_header(
  68         const struct ps3_sys_manager_header *h, const char *func, int line)
  69 {
  70         pr_debug("%s:%d: version:      %xh\n", func, line, h->version);
  71         pr_debug("%s:%d: size:         %xh\n", func, line, h->size);
  72         pr_debug("%s:%d: payload_size: %xh\n", func, line, h->payload_size);
  73         pr_debug("%s:%d: service_id:   %xh\n", func, line, h->service_id);
  74         pr_debug("%s:%d: request_tag:  %xh\n", func, line, h->request_tag);
  75 }
  76
  77 /**
  78  * @PS3_SM_RX_MSG_LEN_MIN - Shortest received message length.
  79  * @PS3_SM_RX_MSG_LEN_MAX - Longest received message length.
  80  *
  81  * Currently all messages received from the system manager are either
  82  * (16 bytes header + 8 bytes payload = 24 bytes) or (16 bytes header
  83  * + 16 bytes payload = 32 bytes).  This knowlege is used to simplify
  84  * the logic.
  85  */
  86
  87 enum {
  88         PS3_SM_RX_MSG_LEN_MIN = 24,
  89         PS3_SM_RX_MSG_LEN_MAX = 32,
  90 };
  91
  92 /**
  93  * enum ps3_sys_manager_service_id - Message header service_id.
  94  * @PS3_SM_SERVICE_ID_REQUEST:       guest --> sys_manager.
  95  * @PS3_SM_SERVICE_ID_REQUEST_ERROR: guest <-- sys_manager.
  96  * @PS3_SM_SERVICE_ID_COMMAND:       guest <-- sys_manager.
  97  * @PS3_SM_SERVICE_ID_RESPONSE:      guest --> sys_manager.
  98  * @PS3_SM_SERVICE_ID_SET_ATTR:      guest --> sys_manager.
  99  * @PS3_SM_SERVICE_ID_EXTERN_EVENT:  guest <-- sys_manager.
 100  * @PS3_SM_SERVICE_ID_SET_NEXT_OP:   guest --> sys_manager.
 101  *
 102  * PS3_SM_SERVICE_ID_REQUEST_ERROR is returned for invalid data values in a
 103  * a PS3_SM_SERVICE_ID_REQUEST message.  It also seems to be returned when
 104  * a REQUEST message is sent at the wrong time.
 105  */
 106
 107 enum ps3_sys_manager_service_id {
 108         /* version 1 */
 109         PS3_SM_SERVICE_ID_REQUEST = 1,
 110         PS3_SM_SERVICE_ID_RESPONSE = 2,
 111         PS3_SM_SERVICE_ID_COMMAND = 3,
 112         PS3_SM_SERVICE_ID_EXTERN_EVENT = 4,
 113         PS3_SM_SERVICE_ID_SET_NEXT_OP = 5,
 114         PS3_SM_SERVICE_ID_REQUEST_ERROR = 6,
 115         PS3_SM_SERVICE_ID_SET_ATTR = 8,
 116 };
 117
 118 /**
 119  * enum ps3_sys_manager_attr - Notification attribute (bit position mask).
 120  * @PS3_SM_ATTR_POWER: Power button.
 121  * @PS3_SM_ATTR_RESET: Reset button, not available on retail console.
 122  * @PS3_SM_ATTR_THERMAL: Sytem thermal alert.
 123  * @PS3_SM_ATTR_CONTROLLER: Remote controller event.
 124  * @PS3_SM_ATTR_ALL: Logical OR of all.
 125  *
 126  * The guest tells the system manager which events it is interested in receiving
 127  * notice of by sending the system manager a logical OR of notification
 128  * attributes via the ps3_sys_manager_send_attr() routine.
 129  */
 130
 131 enum ps3_sys_manager_attr {
 132         /* version 1 */
 133         PS3_SM_ATTR_POWER = 1,
 134         PS3_SM_ATTR_RESET = 2,
 135         PS3_SM_ATTR_THERMAL = 4,
 136         PS3_SM_ATTR_CONTROLLER = 8, /* bogus? */
 137         PS3_SM_ATTR_ALL = 0x0f,
 138 };
 139
 140 /**
 141  * enum ps3_sys_manager_event - External event type, reported by system manager.
 142  * @PS3_SM_EVENT_POWER_PRESSED: payload.value =
 143  *  enum ps3_sys_manager_button_event.
 144  * @PS3_SM_EVENT_POWER_RELEASED: payload.value = time pressed in millisec.
 145  * @PS3_SM_EVENT_RESET_PRESSED: payload.value =
 146  *  enum ps3_sys_manager_button_event.
 147  * @PS3_SM_EVENT_RESET_RELEASED: payload.value = time pressed in millisec.
 148  * @PS3_SM_EVENT_THERMAL_ALERT: payload.value = thermal zone id.
 149  * @PS3_SM_EVENT_THERMAL_CLEARED: payload.value = thermal zone id.
 150  */
 151
 152 enum ps3_sys_manager_event {
 153         /* version 1 */
 154         PS3_SM_EVENT_POWER_PRESSED = 3,
 155         PS3_SM_EVENT_POWER_RELEASED = 4,
 156         PS3_SM_EVENT_RESET_PRESSED = 5,
 157         PS3_SM_EVENT_RESET_RELEASED = 6,
 158         PS3_SM_EVENT_THERMAL_ALERT = 7,
 159         PS3_SM_EVENT_THERMAL_CLEARED = 8,
 160         /* no info on controller events */
 161 };
 162
 163 /**
 164  * enum ps3_sys_manager_button_event - Button event payload values.
 165  * @PS3_SM_BUTTON_EVENT_HARD: Hardware generated event.
 166  * @PS3_SM_BUTTON_EVENT_SOFT: Software generated event.
 167  */
 168
 169 enum ps3_sys_manager_button_event {
 170         PS3_SM_BUTTON_EVENT_HARD = 0,
 171         PS3_SM_BUTTON_EVENT_SOFT = 1,
 172 };
 173
 174 /**
 175  * enum ps3_sys_manager_next_op - Operation to perform after lpar is destroyed.
 176  */
 177
 178 enum ps3_sys_manager_next_op {
 179         /* version 3 */
 180         PS3_SM_NEXT_OP_SYS_SHUTDOWN = 1,
 181         PS3_SM_NEXT_OP_SYS_REBOOT = 2,
 182         PS3_SM_NEXT_OP_LPAR_REBOOT = 0x82,
 183 };
 184
 185 /**
 186  * enum ps3_sys_manager_wake_source - Next-op wakeup source (bit position mask).
 187  * @PS3_SM_WAKE_DEFAULT: Disk insert, power button, eject button.
 188  * @PS3_SM_WAKE_W_O_L: Ether or wireless LAN.
 189  * @PS3_SM_WAKE_P_O_R: Power on reset.
 190  *
 191  * Additional wakeup sources when specifying PS3_SM_NEXT_OP_SYS_SHUTDOWN.
 192  * The system will always wake from the PS3_SM_WAKE_DEFAULT sources.
 193  * Sources listed here are the only ones available to guests in the
 194  * other-os lpar.
 195  */
 196
 197 enum ps3_sys_manager_wake_source {
 198         /* version 3 */
 199         PS3_SM_WAKE_DEFAULT   = 0,
 200         PS3_SM_WAKE_W_O_L     = 0x00000400,
 201         PS3_SM_WAKE_P_O_R     = 0x80000000,
 202 };
 203
 204 /**
 205  * user_wake_sources - User specified wakeup sources.
 206  *
 207  * Logical OR of enum ps3_sys_manager_wake_source types.
 208  */
 209
 210 static u32 user_wake_sources = PS3_SM_WAKE_DEFAULT;
 211
 212 /**
 213  * enum ps3_sys_manager_cmd - Command from system manager to guest.
 214  *
 215  * The guest completes the actions needed, then acks or naks the command via
 216  * ps3_sys_manager_send_response().  In the case of @PS3_SM_CMD_SHUTDOWN,
 217  * the guest must be fully prepared for a system poweroff prior to acking the
 218  * command.
 219  */
 220
 221 enum ps3_sys_manager_cmd {
 222         /* version 1 */
 223         PS3_SM_CMD_SHUTDOWN = 1, /* shutdown guest OS */
 224 };
 225
 226 /**
 227  * ps3_sm_force_power_off - Poweroff helper.
 228  *
 229  * A global variable used to force a poweroff when the power button has
 230  * been pressed irrespective of how init handles the ctrl_alt_del signal.
 231  *
 232  */
 233
 234 static unsigned int ps3_sm_force_power_off;
 235
 236 /**
 237  * ps3_sys_manager_write - Helper to write a two part message to the vuart.
 238  *
 239  */
 240
 241 static int ps3_sys_manager_write(struct ps3_system_bus_device *dev,
 242         const struct ps3_sys_manager_header *header, const void *payload)
 243 {
 244         int result;
 245
 246         BUG_ON(header->version != 1);
 247         BUG_ON(header->size != 16);
 248         BUG_ON(header->payload_size != 8 && header->payload_size != 16);
 249         BUG_ON(header->service_id > 8);
 250
 251         result = ps3_vuart_write(dev, header,
 252                 sizeof(struct ps3_sys_manager_header));
 253
 254         if (!result)
 255                 result = ps3_vuart_write(dev, payload, header->payload_size);
 256
 257         return result;
 258 }
 259
 260 /**
 261  * ps3_sys_manager_send_attr - Send a 'set attribute' to the system manager.
 262  *
 263  */
 264
 265 static int ps3_sys_manager_send_attr(struct ps3_system_bus_device *dev,
 266         enum ps3_sys_manager_attr attr)
 267 {
 268         struct ps3_sys_manager_header header;
 269         struct {
 270                 u8 version;
 271                 u8 reserved_1[3];
 272                 u32 attribute;
 273         } payload;
 274
 275         BUILD_BUG_ON(sizeof(payload) != 8);
 276
 277         dev_dbg(&dev->core, "%s:%d: %xh\n", __func__, __LINE__, attr);
 278
 279         memset(&header, 0, sizeof(header));
 280         header.version = 1;
 281         header.size = 16;
 282         header.payload_size = 16;
 283         header.service_id = PS3_SM_SERVICE_ID_SET_ATTR;
 284
 285         memset(&payload, 0, sizeof(payload));
 286         payload.version = 1;
 287         payload.attribute = attr;
 288
 289         return ps3_sys_manager_write(dev, &header, &payload);
 290 }
 291
 292 /**
 293  * ps3_sys_manager_send_next_op - Send a 'set next op' to the system manager.
 294  *
 295  * Tell the system manager what to do after this lpar is destroyed.
 296  */
 297
 298 static int ps3_sys_manager_send_next_op(struct ps3_system_bus_device *dev,
 299         enum ps3_sys_manager_next_op op,
 300         enum ps3_sys_manager_wake_source wake_source)
 301 {
 302         struct ps3_sys_manager_header header;
 303         struct {
 304                 u8 version;
 305                 u8 type;
 306                 u8 gos_id;
 307                 u8 reserved_1;
 308                 u32 wake_source;
 309                 u8 reserved_2[8];
 310         } payload;
 311
 312         BUILD_BUG_ON(sizeof(payload) != 16);
 313
 314         dev_dbg(&dev->core, "%s:%d: (%xh)\n", __func__, __LINE__, op);
 315
 316         memset(&header, 0, sizeof(header));
 317         header.version = 1;
 318         header.size = 16;
 319         header.payload_size = 16;
 320         header.service_id = PS3_SM_SERVICE_ID_SET_NEXT_OP;
 321
 322         memset(&payload, 0, sizeof(payload));
 323         payload.version = 3;
 324         payload.type = op;
 325         payload.gos_id = 3; /* other os */
 326         payload.wake_source = wake_source;
 327
 328         return ps3_sys_manager_write(dev, &header, &payload);
 329 }
 330
 331 /**
 332  * ps3_sys_manager_send_request_shutdown - Send 'request' to the system manager.
 333  *
 334  * The guest sends this message to request an operation or action of the system
 335  * manager.  The reply is a command message from the system manager.  In the
 336  * command handler the guest performs the requested operation.  The result of
 337  * the command is then communicated back to the system manager with a response
 338  * message.
 339  *
 340  * Currently, the only supported request is the 'shutdown self' request.
 341  */
 342
 343 static int ps3_sys_manager_send_request_shutdown(
 344         struct ps3_system_bus_device *dev)
 345 {
 346         struct ps3_sys_manager_header header;
 347         struct {
 348                 u8 version;
 349                 u8 type;
 350                 u8 gos_id;
 351                 u8 reserved_1[13];
 352         } payload;
 353
 354         BUILD_BUG_ON(sizeof(payload) != 16);
 355
 356         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 357
 358         memset(&header, 0, sizeof(header));
 359         header.version = 1;
 360         header.size = 16;
 361         header.payload_size = 16;
 362         header.service_id = PS3_SM_SERVICE_ID_REQUEST;
 363
 364         memset(&payload, 0, sizeof(payload));
 365         payload.version = 1;
 366         payload.type = 1; /* shutdown */
 367         payload.gos_id = 0; /* self */
 368
 369         return ps3_sys_manager_write(dev, &header, &payload);
 370 }
 371
 372 /**
 373  * ps3_sys_manager_send_response - Send a 'response' to the system manager.
 374  * @status: zero = success, others fail.
 375  *
 376  * The guest sends this message to the system manager to acnowledge success or
 377  * failure of a command sent by the system manager.
 378  */
 379
 380 static int ps3_sys_manager_send_response(struct ps3_system_bus_device *dev,
 381         u64 status)
 382 {
 383         struct ps3_sys_manager_header header;
 384         struct {
 385                 u8 version;
 386                 u8 reserved_1[3];
 387                 u8 status;
 388                 u8 reserved_2[11];
 389         } payload;
 390
 391         BUILD_BUG_ON(sizeof(payload) != 16);
 392
 393         dev_dbg(&dev->core, "%s:%d: (%s)\n", __func__, __LINE__,
 394                 (status ? "nak" : "ack"));
 395
 396         memset(&header, 0, sizeof(header));
 397         header.version = 1;
 398         header.size = 16;
 399         header.payload_size = 16;
 400         header.service_id = PS3_SM_SERVICE_ID_RESPONSE;
 401
 402         memset(&payload, 0, sizeof(payload));
 403         payload.version = 1;
 404         payload.status = status;
 405
 406         return ps3_sys_manager_write(dev, &header, &payload);
 407 }
 408
 409 /**
 410  * ps3_sys_manager_handle_event - Second stage event msg handler.
 411  *
 412  */
 413
 414 static int ps3_sys_manager_handle_event(struct ps3_system_bus_device *dev)
 415 {
 416         int result;
 417         struct {
 418                 u8 version;
 419                 u8 type;
 420                 u8 reserved_1[2];
 421                 u32 value;
 422                 u8 reserved_2[8];
 423         } event;
 424
 425         BUILD_BUG_ON(sizeof(event) != 16);
 426
 427         result = ps3_vuart_read(dev, &event, sizeof(event));
 428         BUG_ON(result && "need to retry here");
 429
 430         if (event.version != 1) {
 431                 dev_dbg(&dev->core, "%s:%d: unsupported event version (%u)\n",
 432                         __func__, __LINE__, event.version);
 433                 return -EIO;
 434         }
 435
 436         switch (event.type) {
 437         case PS3_SM_EVENT_POWER_PRESSED:
 438                 dev_dbg(&dev->core, "%s:%d: POWER_PRESSED (%s)\n",
 439                         __func__, __LINE__,
 440                         (event.value == PS3_SM_BUTTON_EVENT_SOFT ? "soft"
 441                         : "hard"));
 442                 ps3_sm_force_power_off = 1;
 443                 /*
 444                  * A memory barrier is use here to sync memory since
 445                  * ps3_sys_manager_final_restart() could be called on
 446                  * another cpu.
 447                  */
 448                 wmb();
 449                 kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */
 450                 break;
 451         case PS3_SM_EVENT_POWER_RELEASED:
 452                 dev_dbg(&dev->core, "%s:%d: POWER_RELEASED (%u ms)\n",
 453                         __func__, __LINE__, event.value);
 454                 break;
 455         case PS3_SM_EVENT_RESET_PRESSED:
 456                 dev_dbg(&dev->core, "%s:%d: RESET_PRESSED (%s)\n",
 457                         __func__, __LINE__,
 458                         (event.value == PS3_SM_BUTTON_EVENT_SOFT ? "soft"
 459                         : "hard"));
 460                 ps3_sm_force_power_off = 0;
 461                 /*
 462                  * A memory barrier is use here to sync memory since
 463                  * ps3_sys_manager_final_restart() could be called on
 464                  * another cpu.
 465                  */
 466                 wmb();
 467                 kill_cad_pid(SIGINT, 1); /* ctrl_alt_del */
 468                 break;
 469         case PS3_SM_EVENT_RESET_RELEASED:
 470                 dev_dbg(&dev->core, "%s:%d: RESET_RELEASED (%u ms)\n",
 471                         __func__, __LINE__, event.value);
 472                 break;
 473         case PS3_SM_EVENT_THERMAL_ALERT:
 474                 dev_dbg(&dev->core, "%s:%d: THERMAL_ALERT (zone %u)\n",
 475                         __func__, __LINE__, event.value);
 476                 pr_info("PS3 Thermal Alert Zone %u\n", event.value);
 477                 break;
 478         case PS3_SM_EVENT_THERMAL_CLEARED:
 479                 dev_dbg(&dev->core, "%s:%d: THERMAL_CLEARED (zone %u)\n",
 480                         __func__, __LINE__, event.value);
 481                 break;
 482         default:
 483                 dev_dbg(&dev->core, "%s:%d: unknown event (%u)\n",
 484                         __func__, __LINE__, event.type);
 485                 return -EIO;
 486         }
 487
 488         return 0;
 489 }
 490 /**
 491  * ps3_sys_manager_handle_cmd - Second stage command msg handler.
 492  *
 493  * The system manager sends this in reply to a 'request' message from the guest.
 494  */
 495
 496 static int ps3_sys_manager_handle_cmd(struct ps3_system_bus_device *dev)
 497 {
 498         int result;
 499         struct {
 500                 u8 version;
 501                 u8 type;
 502                 u8 reserved_1[14];
 503         } cmd;
 504
 505         BUILD_BUG_ON(sizeof(cmd) != 16);
 506
 507         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 508
 509         result = ps3_vuart_read(dev, &cmd, sizeof(cmd));
 510         BUG_ON(result && "need to retry here");
 511
 512         if (result)
 513                 return result;
 514
 515         if (cmd.version != 1) {
 516                 dev_dbg(&dev->core, "%s:%d: unsupported cmd version (%u)\n",
 517                         __func__, __LINE__, cmd.version);
 518                 return -EIO;
 519         }
 520
 521         if (cmd.type != PS3_SM_CMD_SHUTDOWN) {
 522                 dev_dbg(&dev->core, "%s:%d: unknown cmd (%u)\n",
 523                         __func__, __LINE__, cmd.type);
 524                 return -EIO;
 525         }
 526
 527         ps3_sys_manager_send_response(dev, 0);
 528         return 0;
 529 }
 530
 531 /**
 532  * ps3_sys_manager_handle_msg - First stage msg handler.
 533  *
 534  * Can be called directly to manually poll vuart and pump message handler.
 535  */
 536
 537 static int ps3_sys_manager_handle_msg(struct ps3_system_bus_device *dev)
 538 {
 539         int result;
 540         struct ps3_sys_manager_header header;
 541
 542         result = ps3_vuart_read(dev, &header,
 543                 sizeof(struct ps3_sys_manager_header));
 544
 545         if (result)
 546                 return result;
 547
 548         if (header.version != 1) {
 549                 dev_dbg(&dev->core, "%s:%d: unsupported header version (%u)\n",
 550                         __func__, __LINE__, header.version);
 551                 dump_sm_header(&header);
 552                 goto fail_header;
 553         }
 554
 555         BUILD_BUG_ON(sizeof(header) != 16);
 556
 557         if (header.size != 16 || (header.payload_size != 8
 558                 && header.payload_size != 16)) {
 559                 dump_sm_header(&header);
 560                 BUG();
 561         }
 562
 563         switch (header.service_id) {
 564         case PS3_SM_SERVICE_ID_EXTERN_EVENT:
 565                 dev_dbg(&dev->core, "%s:%d: EVENT\n", __func__, __LINE__);
 566                 return ps3_sys_manager_handle_event(dev);
 567         case PS3_SM_SERVICE_ID_COMMAND:
 568                 dev_dbg(&dev->core, "%s:%d: COMMAND\n", __func__, __LINE__);
 569                 return ps3_sys_manager_handle_cmd(dev);
 570         case PS3_SM_SERVICE_ID_REQUEST_ERROR:
 571                 dev_dbg(&dev->core, "%s:%d: REQUEST_ERROR\n", __func__,
 572                         __LINE__);
 573                 dump_sm_header(&header);
 574                 break;
 575         default:
 576                 dev_dbg(&dev->core, "%s:%d: unknown service_id (%u)\n",
 577                         __func__, __LINE__, header.service_id);
 578                 break;
 579         }
 580         goto fail_id;
 581
 582 fail_header:
 583         ps3_vuart_clear_rx_bytes(dev, 0);
 584         return -EIO;
 585 fail_id:
 586         ps3_vuart_clear_rx_bytes(dev, header.payload_size);
 587         return -EIO;
 588 }
 589
 590 static void ps3_sys_manager_fin(struct ps3_system_bus_device *dev)
 591 {
 592         ps3_sys_manager_send_request_shutdown(dev);
 593
 594         pr_emerg("System Halted, OK to turn off power\n");
 595
 596         while (ps3_sys_manager_handle_msg(dev)) {
 597                 /* pause until next DEC interrupt */
 598                 lv1_pause(0);
 599         }
 600
 601         while (1) {
 602                 /* pause, ignoring DEC interrupt */
 603                 lv1_pause(1);
 604         }
 605 }
 606
 607 /**
 608  * ps3_sys_manager_final_power_off - The final platform machine_power_off routine.
 609  *
 610  * This routine never returns.  The routine disables asynchronous vuart reads
 611  * then spins calling ps3_sys_manager_handle_msg() to receive and acknowledge
 612  * the shutdown command sent from the system manager.  Soon after the
 613  * acknowledgement is sent the lpar is destroyed by the HV.  This routine
 614  * should only be called from ps3_power_off() through
 615  * ps3_sys_manager_ops.power_off.
 616  */
 617
 618 static void ps3_sys_manager_final_power_off(struct ps3_system_bus_device *dev)
 619 {
 620         BUG_ON(!dev);
 621
 622         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 623
 624         ps3_vuart_cancel_async(dev);
 625
 626         ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_SYS_SHUTDOWN,
 627                 user_wake_sources);
 628
 629         ps3_sys_manager_fin(dev);
 630 }
 631
 632 /**
 633  * ps3_sys_manager_final_restart - The final platform machine_restart routine.
 634  *
 635  * This routine never returns.  The routine disables asynchronous vuart reads
 636  * then spins calling ps3_sys_manager_handle_msg() to receive and acknowledge
 637  * the shutdown command sent from the system manager.  Soon after the
 638  * acknowledgement is sent the lpar is destroyed by the HV.  This routine
 639  * should only be called from ps3_restart() through ps3_sys_manager_ops.restart.
 640  */
 641
 642 static void ps3_sys_manager_final_restart(struct ps3_system_bus_device *dev)
 643 {
 644         BUG_ON(!dev);
 645
 646         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 647
 648         /* Check if we got here via a power button event. */
 649
 650         if (ps3_sm_force_power_off) {
 651                 dev_dbg(&dev->core, "%s:%d: forcing poweroff\n",
 652                         __func__, __LINE__);
 653                 ps3_sys_manager_final_power_off(dev);
 654         }
 655
 656         ps3_vuart_cancel_async(dev);
 657
 658         ps3_sys_manager_send_attr(dev, 0);
 659         ps3_sys_manager_send_next_op(dev, PS3_SM_NEXT_OP_SYS_REBOOT,
 660                 user_wake_sources);
 661
 662         ps3_sys_manager_fin(dev);
 663 }
 664
 665 /**
 666  * ps3_sys_manager_get_wol - Get wake-on-lan setting.
 667  */
 668
 669 int ps3_sys_manager_get_wol(void)
 670 {
 671         pr_debug("%s:%d\n", __func__, __LINE__);
 672
 673         return (user_wake_sources & PS3_SM_WAKE_W_O_L) != 0;
 674 }
 675 EXPORT_SYMBOL_GPL(ps3_sys_manager_get_wol);
 676
 677 /**
 678  * ps3_sys_manager_set_wol - Set wake-on-lan setting.
 679  */
 680
 681 void ps3_sys_manager_set_wol(int state)
 682 {
 683         static DEFINE_MUTEX(mutex);
 684
 685         mutex_lock(&mutex);
 686
 687         pr_debug("%s:%d: %d\n", __func__, __LINE__, state);
 688
 689         if (state)
 690                 user_wake_sources |= PS3_SM_WAKE_W_O_L;
 691         else
 692                 user_wake_sources &= ~PS3_SM_WAKE_W_O_L;
 693         mutex_unlock(&mutex);
 694 }
 695 EXPORT_SYMBOL_GPL(ps3_sys_manager_set_wol);
 696
 697 /**
 698  * ps3_sys_manager_work - Asynchronous read handler.
 699  *
 700  * Signaled when PS3_SM_RX_MSG_LEN_MIN bytes arrive at the vuart port.
 701  */
 702
 703 static void ps3_sys_manager_work(struct ps3_system_bus_device *dev)
 704 {
 705         ps3_sys_manager_handle_msg(dev);
 706         ps3_vuart_read_async(dev, PS3_SM_RX_MSG_LEN_MIN);
 707 }
 708
 709 static int __devinit ps3_sys_manager_probe(struct ps3_system_bus_device *dev)
 710 {
 711         int result;
 712         struct ps3_sys_manager_ops ops;
 713
 714         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 715
 716         ops.power_off = ps3_sys_manager_final_power_off;
 717         ops.restart = ps3_sys_manager_final_restart;
 718         ops.dev = dev;
 719
 720         /* ps3_sys_manager_register_ops copies ops. */
 721
 722         ps3_sys_manager_register_ops(&ops);
 723
 724         result = ps3_sys_manager_send_attr(dev, PS3_SM_ATTR_ALL);
 725         BUG_ON(result);
 726
 727         result = ps3_vuart_read_async(dev, PS3_SM_RX_MSG_LEN_MIN);
 728         BUG_ON(result);
 729
 730         return result;
 731 }
 732
 733 static int ps3_sys_manager_remove(struct ps3_system_bus_device *dev)
 734 {
 735         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 736         return 0;
 737 }
 738
 739 static void ps3_sys_manager_shutdown(struct ps3_system_bus_device *dev)
 740 {
 741         dev_dbg(&dev->core, "%s:%d\n", __func__, __LINE__);
 742 }
 743
 744 static struct ps3_vuart_port_driver ps3_sys_manager = {
 745         .core.match_id = PS3_MATCH_ID_SYSTEM_MANAGER,
 746         .core.core.name = "ps3_sys_manager",
 747         .probe = ps3_sys_manager_probe,
 748         .remove = ps3_sys_manager_remove,
 749         .shutdown = ps3_sys_manager_shutdown,
 750         .work = ps3_sys_manager_work,
 751 };
 752
 753 static int __init ps3_sys_manager_init(void)
 754 {
 755         if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
 756                 return -ENODEV;
 757
 758         return ps3_vuart_port_driver_register(&ps3_sys_manager);
 759 }
 760
 761 module_init(ps3_sys_manager_init);
 762 /* Module remove not supported. */
 763
 764 MODULE_AUTHOR("Sony Corporation");
 765 MODULE_LICENSE("GPL v2");
 766 MODULE_DESCRIPTION("PS3 System Manager");
 767 MODULE_ALIAS(PS3_MODULE_ALIAS_SYSTEM_MANAGER);