1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Driver for Digigram miXart soundcards 4 * 5 * low level interface with interrupt handling and mail box implementation 6 * 7 * Copyright (c) 2003 by Digigram <alsa@digigram.com> 8 */ 9 10 #include <linux/interrupt.h> 11 #include <linux/mutex.h> 12 #include <linux/pci.h> 13 #include <linux/io.h> 14 15 #include <sound/core.h> 16 #include "mixart.h" 17 #include "mixart_hwdep.h" 18 #include "mixart_core.h" 19 20 21 #define MSG_TIMEOUT_JIFFIES (400 * HZ) / 1000 /* 400 ms */ 22 23 #define MSG_DESCRIPTOR_SIZE 0x24 24 #define MSG_HEADER_SIZE (MSG_DESCRIPTOR_SIZE + 4) 25 26 #define MSG_TYPE_MASK 0x00000003 /* mask for following types */ 27 #define MSG_TYPE_NOTIFY 0 /* embedded -> driver (only notification, do not get_msg() !) */ 28 #define MSG_TYPE_COMMAND 1 /* driver <-> embedded (a command has no answer) */ 29 #define MSG_TYPE_REQUEST 2 /* driver -> embedded (request will get an answer back) */ 30 #define MSG_TYPE_ANSWER 3 /* embedded -> driver */ 31 #define MSG_CANCEL_NOTIFY_MASK 0x80000000 /* this bit is set for a notification that has been canceled */ 32 33 34 static int retrieve_msg_frame(struct mixart_mgr *mgr, u32 *msg_frame) 35 { 36 /* read the message frame fifo */ 37 u32 headptr, tailptr; 38 39 tailptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL)); 40 headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_HEAD)); 41 42 if (tailptr == headptr) 43 return 0; /* no message posted */ 44 45 if (tailptr < MSG_OUTBOUND_POST_STACK) 46 return 0; /* error */ 47 if (tailptr >= MSG_OUTBOUND_POST_STACK + MSG_BOUND_STACK_SIZE) 48 return 0; /* error */ 49 50 *msg_frame = readl_be(MIXART_MEM(mgr, tailptr)); 51 52 /* increment the tail index */ 53 tailptr += 4; 54 if( tailptr >= (MSG_OUTBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) ) 55 tailptr = MSG_OUTBOUND_POST_STACK; 56 writel_be(tailptr, MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL)); 57 58 return 1; 59 } 60 61 static int get_msg(struct mixart_mgr *mgr, struct mixart_msg *resp, 62 u32 msg_frame_address ) 63 { 64 u32 headptr; 65 u32 size; 66 int err; 67 #ifndef __BIG_ENDIAN 68 unsigned int i; 69 #endif 70 71 err = 0; 72 73 /* copy message descriptor from miXart to driver */ 74 size = readl_be(MIXART_MEM(mgr, msg_frame_address)); /* size of descriptor + response */ 75 resp->message_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 4)); /* dwMessageID */ 76 resp->uid.object_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 8)); /* uidDest */ 77 resp->uid.desc = readl_be(MIXART_MEM(mgr, msg_frame_address + 12)); /* */ 78 79 if( (size < MSG_DESCRIPTOR_SIZE) || (resp->size < (size - MSG_DESCRIPTOR_SIZE))) { 80 err = -EINVAL; 81 dev_err(&mgr->pci->dev, 82 "problem with response size = %d\n", size); 83 goto _clean_exit; 84 } 85 size -= MSG_DESCRIPTOR_SIZE; 86 87 memcpy_fromio(resp->data, MIXART_MEM(mgr, msg_frame_address + MSG_HEADER_SIZE ), size); 88 resp->size = size; 89 90 /* swap if necessary */ 91 #ifndef __BIG_ENDIAN 92 size /= 4; /* u32 size */ 93 for(i=0; i < size; i++) { 94 ((u32*)resp->data)[i] = be32_to_cpu(((__be32*)resp->data)[i]); 95 } 96 #endif 97 98 /* 99 * free message frame address 100 */ 101 headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD)); 102 103 if( (headptr < MSG_OUTBOUND_FREE_STACK) || ( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) { 104 err = -EINVAL; 105 goto _clean_exit; 106 } 107 108 /* give address back to outbound fifo */ 109 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr)); 110 111 /* increment the outbound free head */ 112 headptr += 4; 113 if( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) ) 114 headptr = MSG_OUTBOUND_FREE_STACK; 115 116 writel_be(headptr, MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD)); 117 118 _clean_exit: 119 return err; 120 } 121 122 123 /* 124 * send a message to miXart. return: the msg_frame used for this message 125 */ 126 /* call with mgr->msg_lock held! */ 127 static int send_msg( struct mixart_mgr *mgr, 128 struct mixart_msg *msg, 129 int max_answersize, 130 int mark_pending, 131 u32 *msg_event) 132 { 133 u32 headptr, tailptr; 134 u32 msg_frame_address; 135 int i; 136 137 if (snd_BUG_ON(msg->size % 4)) 138 return -EINVAL; 139 140 /* get message frame address */ 141 tailptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL)); 142 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_HEAD)); 143 144 if (tailptr == headptr) { 145 dev_err(&mgr->pci->dev, "error: no message frame available\n"); 146 return -EBUSY; 147 } 148 149 if( (tailptr < MSG_INBOUND_FREE_STACK) || (tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) { 150 return -EINVAL; 151 } 152 153 msg_frame_address = readl_be(MIXART_MEM(mgr, tailptr)); 154 writel(0, MIXART_MEM(mgr, tailptr)); /* set address to zero on this fifo position */ 155 156 /* increment the inbound free tail */ 157 tailptr += 4; 158 if( tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) ) 159 tailptr = MSG_INBOUND_FREE_STACK; 160 161 writel_be(tailptr, MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL)); 162 163 /* TODO : use memcpy_toio() with intermediate buffer to copy the message */ 164 165 /* copy message descriptor to card memory */ 166 writel_be( msg->size + MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address) ); /* size of descriptor + request */ 167 writel_be( msg->message_id , MIXART_MEM(mgr, msg_frame_address + 4) ); /* dwMessageID */ 168 writel_be( msg->uid.object_id, MIXART_MEM(mgr, msg_frame_address + 8) ); /* uidDest */ 169 writel_be( msg->uid.desc, MIXART_MEM(mgr, msg_frame_address + 12) ); /* */ 170 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 16) ); /* SizeHeader */ 171 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 20) ); /* OffsetDLL_T16 */ 172 writel_be( msg->size, MIXART_MEM(mgr, msg_frame_address + 24) ); /* SizeDLL_T16 */ 173 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 28) ); /* OffsetDLL_DRV */ 174 writel_be( 0, MIXART_MEM(mgr, msg_frame_address + 32) ); /* SizeDLL_DRV */ 175 writel_be( MSG_DESCRIPTOR_SIZE + max_answersize, MIXART_MEM(mgr, msg_frame_address + 36) ); /* dwExpectedAnswerSize */ 176 177 /* copy message data to card memory */ 178 for( i=0; i < msg->size; i+=4 ) { 179 writel_be( *(u32*)(msg->data + i), MIXART_MEM(mgr, MSG_HEADER_SIZE + msg_frame_address + i) ); 180 } 181 182 if( mark_pending ) { 183 if( *msg_event ) { 184 /* the pending event is the notification we wait for ! */ 185 mgr->pending_event = *msg_event; 186 } 187 else { 188 /* the pending event is the answer we wait for (same address than the request)! */ 189 mgr->pending_event = msg_frame_address; 190 191 /* copy address back to caller */ 192 *msg_event = msg_frame_address; 193 } 194 } 195 196 /* mark the frame as a request (will have an answer) */ 197 msg_frame_address |= MSG_TYPE_REQUEST; 198 199 /* post the frame */ 200 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD)); 201 202 if( (headptr < MSG_INBOUND_POST_STACK) || (headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE))) { 203 return -EINVAL; 204 } 205 206 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr)); 207 208 /* increment the inbound post head */ 209 headptr += 4; 210 if( headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) ) 211 headptr = MSG_INBOUND_POST_STACK; 212 213 writel_be(headptr, MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD)); 214 215 return 0; 216 } 217 218 219 int snd_mixart_send_msg(struct mixart_mgr *mgr, struct mixart_msg *request, int max_resp_size, void *resp_data) 220 { 221 struct mixart_msg resp; 222 u32 msg_frame = 0; /* set to 0, so it's no notification to wait for, but the answer */ 223 int err; 224 wait_queue_entry_t wait; 225 long timeout; 226 227 init_waitqueue_entry(&wait, current); 228 229 scoped_guard(mutex, &mgr->msg_lock) { 230 /* send the message */ 231 err = send_msg(mgr, request, max_resp_size, 1, &msg_frame); /* send and mark the answer pending */ 232 if (err) 233 return err; 234 235 set_current_state(TASK_UNINTERRUPTIBLE); 236 add_wait_queue(&mgr->msg_sleep, &wait); 237 } 238 239 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES); 240 remove_wait_queue(&mgr->msg_sleep, &wait); 241 242 if (! timeout) { 243 /* error - no ack */ 244 dev_err(&mgr->pci->dev, 245 "error: no response on msg %x\n", msg_frame); 246 return -EIO; 247 } 248 249 /* retrieve the answer into the same struct mixart_msg */ 250 resp.message_id = 0; 251 resp.uid = (struct mixart_uid){0,0}; 252 resp.data = resp_data; 253 resp.size = max_resp_size; 254 255 scoped_guard(mutex, &mgr->msg_lock) { 256 err = get_msg(mgr, &resp, msg_frame); 257 } 258 259 if( request->message_id != resp.message_id ) 260 dev_err(&mgr->pci->dev, "RESPONSE ERROR!\n"); 261 262 return err; 263 } 264 265 266 int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr, 267 struct mixart_msg *request, u32 notif_event) 268 { 269 int err; 270 wait_queue_entry_t wait; 271 long timeout; 272 273 if (snd_BUG_ON(!notif_event)) 274 return -EINVAL; 275 if (snd_BUG_ON((notif_event & MSG_TYPE_MASK) != MSG_TYPE_NOTIFY)) 276 return -EINVAL; 277 if (snd_BUG_ON(notif_event & MSG_CANCEL_NOTIFY_MASK)) 278 return -EINVAL; 279 280 init_waitqueue_entry(&wait, current); 281 282 scoped_guard(mutex, &mgr->msg_lock) { 283 /* send the message */ 284 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 1, ¬if_event); /* send and mark the notification event pending */ 285 if (err) 286 return err; 287 288 set_current_state(TASK_UNINTERRUPTIBLE); 289 add_wait_queue(&mgr->msg_sleep, &wait); 290 } 291 292 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES); 293 remove_wait_queue(&mgr->msg_sleep, &wait); 294 295 if (! timeout) { 296 /* error - no ack */ 297 dev_err(&mgr->pci->dev, 298 "error: notification %x not received\n", notif_event); 299 return -EIO; 300 } 301 302 return 0; 303 } 304 305 306 int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request) 307 { 308 u32 message_frame; 309 int err; 310 311 /* just send the message (do not mark it as a pending one) */ 312 guard(mutex)(&mgr->msg_lock); 313 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 0, &message_frame); 314 315 /* the answer will be handled by snd_struct mixart_msgasklet() */ 316 atomic_inc(&mgr->msg_processed); 317 318 return err; 319 } 320 321 322 /* common buffer of interrupt to send/receive messages */ 323 static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4]; 324 325 326 static void snd_mixart_process_msg(struct mixart_mgr *mgr) 327 { 328 struct mixart_msg resp; 329 u32 msg, addr, type; 330 int err; 331 332 while (mgr->msg_fifo_readptr != mgr->msg_fifo_writeptr) { 333 msg = mgr->msg_fifo[mgr->msg_fifo_readptr]; 334 mgr->msg_fifo_readptr++; 335 mgr->msg_fifo_readptr %= MSG_FIFO_SIZE; 336 337 /* process the message ... */ 338 addr = msg & ~MSG_TYPE_MASK; 339 type = msg & MSG_TYPE_MASK; 340 341 switch (type) { 342 case MSG_TYPE_ANSWER: 343 /* answer to a message on that we did not wait for (send_msg_nonblock) */ 344 resp.message_id = 0; 345 resp.data = mixart_msg_data; 346 resp.size = sizeof(mixart_msg_data); 347 err = get_msg(mgr, &resp, addr); 348 if( err < 0 ) { 349 dev_err(&mgr->pci->dev, 350 "error(%d) reading mf %x\n", 351 err, msg); 352 break; 353 } 354 355 switch(resp.message_id) { 356 case MSG_STREAM_START_INPUT_STAGE_PACKET: 357 case MSG_STREAM_START_OUTPUT_STAGE_PACKET: 358 case MSG_STREAM_STOP_INPUT_STAGE_PACKET: 359 case MSG_STREAM_STOP_OUTPUT_STAGE_PACKET: 360 if(mixart_msg_data[0]) 361 dev_err(&mgr->pci->dev, 362 "error MSG_STREAM_ST***_***PUT_STAGE_PACKET status=%x\n", 363 mixart_msg_data[0]); 364 break; 365 default: 366 dev_dbg(&mgr->pci->dev, 367 "received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n", 368 msg, resp.message_id, resp.uid.object_id, resp.uid.desc, resp.size); 369 break; 370 } 371 break; 372 case MSG_TYPE_NOTIFY: 373 /* msg contains no address ! do not get_msg() ! */ 374 case MSG_TYPE_COMMAND: 375 /* get_msg() necessary */ 376 default: 377 dev_err(&mgr->pci->dev, 378 "doesn't know what to do with message %x\n", 379 msg); 380 } /* switch type */ 381 382 /* decrement counter */ 383 atomic_dec(&mgr->msg_processed); 384 385 } /* while there is a msg in fifo */ 386 } 387 388 389 irqreturn_t snd_mixart_interrupt(int irq, void *dev_id) 390 { 391 struct mixart_mgr *mgr = dev_id; 392 u32 it_reg; 393 394 it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET)); 395 if( !(it_reg & MIXART_OIDI) ) { 396 /* this device did not cause the interrupt */ 397 return IRQ_NONE; 398 } 399 400 /* mask all interrupts */ 401 writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET)); 402 403 /* outdoorbell register clear */ 404 it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET)); 405 writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET)); 406 407 /* clear interrupt */ 408 writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) ); 409 410 return IRQ_WAKE_THREAD; 411 } 412 413 irqreturn_t snd_mixart_threaded_irq(int irq, void *dev_id) 414 { 415 struct mixart_mgr *mgr = dev_id; 416 int err; 417 struct mixart_msg resp; 418 u32 msg; 419 420 guard(mutex)(&mgr->lock); 421 /* process interrupt */ 422 while (retrieve_msg_frame(mgr, &msg)) { 423 424 switch (msg & MSG_TYPE_MASK) { 425 case MSG_TYPE_COMMAND: 426 resp.message_id = 0; 427 resp.data = mixart_msg_data; 428 resp.size = sizeof(mixart_msg_data); 429 err = get_msg(mgr, &resp, msg & ~MSG_TYPE_MASK); 430 if( err < 0 ) { 431 dev_err(&mgr->pci->dev, 432 "interrupt: error(%d) reading mf %x\n", 433 err, msg); 434 break; 435 } 436 437 if(resp.message_id == MSG_SERVICES_TIMER_NOTIFY) { 438 int i; 439 struct mixart_timer_notify *notify; 440 notify = (struct mixart_timer_notify *)mixart_msg_data; 441 442 BUILD_BUG_ON(sizeof(notify) > sizeof(mixart_msg_data)); 443 if (snd_BUG_ON(notify->stream_count > ARRAY_SIZE(notify->streams))) 444 break; 445 for(i=0; i<notify->stream_count; i++) { 446 447 u32 buffer_id = notify->streams[i].buffer_id; 448 unsigned int chip_number = (buffer_id & MIXART_NOTIFY_CARD_MASK) >> MIXART_NOTIFY_CARD_OFFSET; /* card0 to 3 */ 449 unsigned int pcm_number = (buffer_id & MIXART_NOTIFY_PCM_MASK ) >> MIXART_NOTIFY_PCM_OFFSET; /* pcm0 to 3 */ 450 unsigned int sub_number = buffer_id & MIXART_NOTIFY_SUBS_MASK; /* 0 to MIXART_PLAYBACK_STREAMS */ 451 unsigned int is_capture = ((buffer_id & MIXART_NOTIFY_CAPT_MASK) != 0); /* playback == 0 / capture == 1 */ 452 453 struct snd_mixart *chip = mgr->chip[chip_number]; 454 struct mixart_stream *stream; 455 456 if ((chip_number >= mgr->num_cards) || (pcm_number >= MIXART_PCM_TOTAL) || (sub_number >= MIXART_PLAYBACK_STREAMS)) { 457 dev_err(&mgr->pci->dev, 458 "error MSG_SERVICES_TIMER_NOTIFY buffer_id (%x) pos(%d)\n", 459 buffer_id, notify->streams[i].sample_pos_low_part); 460 break; 461 } 462 463 if (is_capture) 464 stream = &chip->capture_stream[pcm_number]; 465 else 466 stream = &chip->playback_stream[pcm_number][sub_number]; 467 468 if (stream->substream && (stream->status == MIXART_STREAM_STATUS_RUNNING)) { 469 struct snd_pcm_runtime *runtime = stream->substream->runtime; 470 int elapsed = 0; 471 u64 sample_count = ((u64)notify->streams[i].sample_pos_high_part) << 32; 472 sample_count |= notify->streams[i].sample_pos_low_part; 473 474 while (1) { 475 u64 new_elapse_pos = stream->abs_period_elapsed + runtime->period_size; 476 477 if (new_elapse_pos > sample_count) { 478 break; /* while */ 479 } 480 else { 481 elapsed = 1; 482 stream->buf_periods++; 483 if (stream->buf_periods >= runtime->periods) 484 stream->buf_periods = 0; 485 486 stream->abs_period_elapsed = new_elapse_pos; 487 } 488 } 489 stream->buf_period_frag = (u32)( sample_count - stream->abs_period_elapsed ); 490 491 if(elapsed) { 492 mutex_unlock(&mgr->lock); 493 snd_pcm_period_elapsed(stream->substream); 494 mutex_lock(&mgr->lock); 495 } 496 } 497 } 498 break; 499 } 500 if(resp.message_id == MSG_SERVICES_REPORT_TRACES) { 501 if(resp.size > 1) { 502 #ifndef __BIG_ENDIAN 503 /* Traces are text: the swapped msg_data has to be swapped back ! */ 504 int i; 505 for(i=0; i<(resp.size/4); i++) { 506 ((__be32*)mixart_msg_data)[i] = cpu_to_be32((mixart_msg_data)[i]); 507 } 508 #endif 509 ((char*)mixart_msg_data)[resp.size - 1] = 0; 510 dev_dbg(&mgr->pci->dev, 511 "MIXART TRACE : %s\n", 512 (char *)mixart_msg_data); 513 } 514 break; 515 } 516 517 dev_dbg(&mgr->pci->dev, "command %x not handled\n", 518 resp.message_id); 519 break; 520 521 case MSG_TYPE_NOTIFY: 522 if(msg & MSG_CANCEL_NOTIFY_MASK) { 523 msg &= ~MSG_CANCEL_NOTIFY_MASK; 524 dev_err(&mgr->pci->dev, 525 "canceled notification %x !\n", msg); 526 } 527 fallthrough; 528 case MSG_TYPE_ANSWER: 529 /* answer or notification to a message we are waiting for*/ 530 scoped_guard(mutex, &mgr->msg_lock) { 531 if ((msg & ~MSG_TYPE_MASK) == mgr->pending_event) { 532 wake_up(&mgr->msg_sleep); 533 mgr->pending_event = 0; 534 } 535 /* answer to a message we did't want to wait for */ 536 else { 537 mgr->msg_fifo[mgr->msg_fifo_writeptr] = msg; 538 mgr->msg_fifo_writeptr++; 539 mgr->msg_fifo_writeptr %= MSG_FIFO_SIZE; 540 snd_mixart_process_msg(mgr); 541 } 542 } 543 break; 544 case MSG_TYPE_REQUEST: 545 default: 546 dev_dbg(&mgr->pci->dev, 547 "interrupt received request %x\n", msg); 548 /* TODO : are there things to do here ? */ 549 break; 550 } /* switch on msg type */ 551 } /* while there are msgs */ 552 553 /* allow interrupt again */ 554 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET)); 555 556 return IRQ_HANDLED; 557 } 558 559 560 void snd_mixart_init_mailbox(struct mixart_mgr *mgr) 561 { 562 writel( 0, MIXART_MEM( mgr, MSG_HOST_RSC_PROTECTION ) ); 563 writel( 0, MIXART_MEM( mgr, MSG_AGENT_RSC_PROTECTION ) ); 564 565 /* allow outbound messagebox to generate interrupts */ 566 if(mgr->irq >= 0) { 567 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET)); 568 } 569 return; 570 } 571 572 void snd_mixart_exit_mailbox(struct mixart_mgr *mgr) 573 { 574 /* no more interrupts on outbound messagebox */ 575 writel_le( MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET)); 576 return; 577 } 578 579 void snd_mixart_reset_board(struct mixart_mgr *mgr) 580 { 581 /* reset miXart */ 582 writel_be( 1, MIXART_REG(mgr, MIXART_BA1_BRUTAL_RESET_OFFSET) ); 583 return; 584 } 585