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