1/* 2 * Driver for Digigram miXart soundcards 3 * 4 * low level interface with interrupt handling and mail box implementation 5 * 6 * Copyright (c) 2003 by Digigram <alsa@digigram.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 23#include <linux/interrupt.h> 24#include <linux/mutex.h> 25#include <linux/pci.h> 26#include <linux/io.h> 27 28#include <sound/core.h> 29#include "mixart.h" 30#include "mixart_hwdep.h" 31#include "mixart_core.h" 32 33 34#define MSG_TIMEOUT_JIFFIES (400 * HZ) / 1000 /* 400 ms */ 35 36#define MSG_DESCRIPTOR_SIZE 0x24 37#define MSG_HEADER_SIZE (MSG_DESCRIPTOR_SIZE + 4) 38 39#define MSG_DEFAULT_SIZE 512 40 41#define MSG_TYPE_MASK 0x00000003 /* mask for following types */ 42#define MSG_TYPE_NOTIFY 0 /* embedded -> driver (only notification, do not get_msg() !) */ 43#define MSG_TYPE_COMMAND 1 /* driver <-> embedded (a command has no answer) */ 44#define MSG_TYPE_REQUEST 2 /* driver -> embedded (request will get an answer back) */ 45#define MSG_TYPE_ANSWER 3 /* embedded -> driver */ 46#define MSG_CANCEL_NOTIFY_MASK 0x80000000 /* this bit is set for a notification that has been canceled */ 47 48 49static int retrieve_msg_frame(struct mixart_mgr *mgr, u32 *msg_frame) 50{ 51 /* read the message frame fifo */ 52 u32 headptr, tailptr; 53 54 tailptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL)); 55 headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_HEAD)); 56 57 if (tailptr == headptr) 58 return 0; /* no message posted */ 59 60 if (tailptr < MSG_OUTBOUND_POST_STACK) 61 return 0; /* error */ 62 if (tailptr >= MSG_OUTBOUND_POST_STACK + MSG_BOUND_STACK_SIZE) 63 return 0; /* error */ 64 65 *msg_frame = readl_be(MIXART_MEM(mgr, tailptr)); 66 67 /* increment the tail index */ 68 tailptr += 4; 69 if( tailptr >= (MSG_OUTBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) ) 70 tailptr = MSG_OUTBOUND_POST_STACK; 71 writel_be(tailptr, MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL)); 72 73 return 1; 74} 75 76static int get_msg(struct mixart_mgr *mgr, struct mixart_msg *resp, 77 u32 msg_frame_address ) 78{ 79 u32 headptr; 80 u32 size; 81 int err; 82#ifndef __BIG_ENDIAN 83 unsigned int i; 84#endif 85 86 mutex_lock(&mgr->msg_lock); 87 err = 0; 88 89 /* copy message descriptor from miXart to driver */ 90 size = readl_be(MIXART_MEM(mgr, msg_frame_address)); /* size of descriptor + response */ 91 resp->message_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 4)); /* dwMessageID */ 92 resp->uid.object_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 8)); /* uidDest */ 93 resp->uid.desc = readl_be(MIXART_MEM(mgr, msg_frame_address + 12)); /* */ 94 95 if( (size < MSG_DESCRIPTOR_SIZE) || (resp->size < (size - MSG_DESCRIPTOR_SIZE))) { 96 err = -EINVAL; 97 dev_err(&mgr->pci->dev, 98 "problem with response size = %d\n", size); 99 goto _clean_exit; 100 } 101 size -= MSG_DESCRIPTOR_SIZE; 102 103 memcpy_fromio(resp->data, MIXART_MEM(mgr, msg_frame_address + MSG_HEADER_SIZE ), size); 104 resp->size = size; 105 106 /* swap if necessary */ 107#ifndef __BIG_ENDIAN 108 size /= 4; /* u32 size */ 109 for(i=0; i < size; i++) { 110 ((u32*)resp->data)[i] = be32_to_cpu(((u32*)resp->data)[i]); 111 } 112#endif 113 114 /* 115 * free message frame address 116 */ 117 headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD)); 118 119 if( (headptr < MSG_OUTBOUND_FREE_STACK) || ( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) { 120 err = -EINVAL; 121 goto _clean_exit; 122 } 123 124 /* give address back to outbound fifo */ 125 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr)); 126 127 /* increment the outbound free head */ 128 headptr += 4; 129 if( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) ) 130 headptr = MSG_OUTBOUND_FREE_STACK; 131 132 writel_be(headptr, MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD)); 133 134 _clean_exit: 135 mutex_unlock(&mgr->msg_lock); 136 137 return err; 138} 139 140 141/* 142 * send a message to miXart. return: the msg_frame used for this message 143 */ 144/* call with mgr->msg_lock held! */ 145static int send_msg( struct mixart_mgr *mgr, 146 struct mixart_msg *msg, 147 int max_answersize, 148 int mark_pending, 149 u32 *msg_event) 150{ 151 u32 headptr, tailptr; 152 u32 msg_frame_address; 153 int i; 154 155 if (snd_BUG_ON(msg->size % 4)) 156 return -EINVAL; 157 158 /* get message frame address */ 159 tailptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL)); 160 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_HEAD)); 161 162 if (tailptr == headptr) { 163 dev_err(&mgr->pci->dev, "error: no message frame available\n"); 164 return -EBUSY; 165 } 166 167 if( (tailptr < MSG_INBOUND_FREE_STACK) || (tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) { 168 return -EINVAL; 169 } 170 171 msg_frame_address = readl_be(MIXART_MEM(mgr, tailptr)); 172 writel(0, MIXART_MEM(mgr, tailptr)); /* set address to zero on this fifo position */ 173 174 /* increment the inbound free tail */ 175 tailptr += 4; 176 if( tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) ) 177 tailptr = MSG_INBOUND_FREE_STACK; 178 179 writel_be(tailptr, MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL)); 180 181 /* TODO : use memcpy_toio() with intermediate buffer to copy the message */ 182 183 /* copy message descriptor to card memory */ 184 writel_be( msg->size + MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address) ); /* size of descriptor + request */ 185 writel_be( msg->message_id , MIXART_MEM(mgr, msg_frame_address + 4) ); /* dwMessageID */ 186 writel_be( msg->uid.object_id, MIXART_MEM(mgr, msg_frame_address + 8) ); /* uidDest */ 187 writel_be( msg->uid.desc, MIXART_MEM(mgr, msg_frame_address + 12) ); /* */ 188 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 16) ); /* SizeHeader */ 189 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 20) ); /* OffsetDLL_T16 */ 190 writel_be( msg->size, MIXART_MEM(mgr, msg_frame_address + 24) ); /* SizeDLL_T16 */ 191 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 28) ); /* OffsetDLL_DRV */ 192 writel_be( 0, MIXART_MEM(mgr, msg_frame_address + 32) ); /* SizeDLL_DRV */ 193 writel_be( MSG_DESCRIPTOR_SIZE + max_answersize, MIXART_MEM(mgr, msg_frame_address + 36) ); /* dwExpectedAnswerSize */ 194 195 /* copy message data to card memory */ 196 for( i=0; i < msg->size; i+=4 ) { 197 writel_be( *(u32*)(msg->data + i), MIXART_MEM(mgr, MSG_HEADER_SIZE + msg_frame_address + i) ); 198 } 199 200 if( mark_pending ) { 201 if( *msg_event ) { 202 /* the pending event is the notification we wait for ! */ 203 mgr->pending_event = *msg_event; 204 } 205 else { 206 /* the pending event is the answer we wait for (same address than the request)! */ 207 mgr->pending_event = msg_frame_address; 208 209 /* copy address back to caller */ 210 *msg_event = msg_frame_address; 211 } 212 } 213 214 /* mark the frame as a request (will have an answer) */ 215 msg_frame_address |= MSG_TYPE_REQUEST; 216 217 /* post the frame */ 218 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD)); 219 220 if( (headptr < MSG_INBOUND_POST_STACK) || (headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE))) { 221 return -EINVAL; 222 } 223 224 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr)); 225 226 /* increment the inbound post head */ 227 headptr += 4; 228 if( headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) ) 229 headptr = MSG_INBOUND_POST_STACK; 230 231 writel_be(headptr, MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD)); 232 233 return 0; 234} 235 236 237int snd_mixart_send_msg(struct mixart_mgr *mgr, struct mixart_msg *request, int max_resp_size, void *resp_data) 238{ 239 struct mixart_msg resp; 240 u32 msg_frame = 0; /* set to 0, so it's no notification to wait for, but the answer */ 241 int err; 242 wait_queue_t wait; 243 long timeout; 244 245 init_waitqueue_entry(&wait, current); 246 247 mutex_lock(&mgr->msg_lock); 248 /* send the message */ 249 err = send_msg(mgr, request, max_resp_size, 1, &msg_frame); /* send and mark the answer pending */ 250 if (err) { 251 mutex_unlock(&mgr->msg_lock); 252 return err; 253 } 254 255 set_current_state(TASK_UNINTERRUPTIBLE); 256 add_wait_queue(&mgr->msg_sleep, &wait); 257 mutex_unlock(&mgr->msg_lock); 258 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES); 259 remove_wait_queue(&mgr->msg_sleep, &wait); 260 261 if (! timeout) { 262 /* error - no ack */ 263 dev_err(&mgr->pci->dev, 264 "error: no response on msg %x\n", msg_frame); 265 return -EIO; 266 } 267 268 /* retrieve the answer into the same struct mixart_msg */ 269 resp.message_id = 0; 270 resp.uid = (struct mixart_uid){0,0}; 271 resp.data = resp_data; 272 resp.size = max_resp_size; 273 274 err = get_msg(mgr, &resp, msg_frame); 275 276 if( request->message_id != resp.message_id ) 277 dev_err(&mgr->pci->dev, "RESPONSE ERROR!\n"); 278 279 return err; 280} 281 282 283int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr, 284 struct mixart_msg *request, u32 notif_event) 285{ 286 int err; 287 wait_queue_t wait; 288 long timeout; 289 290 if (snd_BUG_ON(!notif_event)) 291 return -EINVAL; 292 if (snd_BUG_ON((notif_event & MSG_TYPE_MASK) != MSG_TYPE_NOTIFY)) 293 return -EINVAL; 294 if (snd_BUG_ON(notif_event & MSG_CANCEL_NOTIFY_MASK)) 295 return -EINVAL; 296 297 init_waitqueue_entry(&wait, current); 298 299 mutex_lock(&mgr->msg_lock); 300 /* send the message */ 301 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 1, ¬if_event); /* send and mark the notification event pending */ 302 if(err) { 303 mutex_unlock(&mgr->msg_lock); 304 return err; 305 } 306 307 set_current_state(TASK_UNINTERRUPTIBLE); 308 add_wait_queue(&mgr->msg_sleep, &wait); 309 mutex_unlock(&mgr->msg_lock); 310 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES); 311 remove_wait_queue(&mgr->msg_sleep, &wait); 312 313 if (! timeout) { 314 /* error - no ack */ 315 dev_err(&mgr->pci->dev, 316 "error: notification %x not received\n", notif_event); 317 return -EIO; 318 } 319 320 return 0; 321} 322 323 324int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request) 325{ 326 u32 message_frame; 327 int err; 328 329 /* just send the message (do not mark it as a pending one) */ 330 mutex_lock(&mgr->msg_lock); 331 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 0, &message_frame); 332 mutex_unlock(&mgr->msg_lock); 333 334 /* the answer will be handled by snd_struct mixart_msgasklet() */ 335 atomic_inc(&mgr->msg_processed); 336 337 return err; 338} 339 340 341/* common buffer of interrupt to send/receive messages */ 342static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4]; 343 344 345static void snd_mixart_process_msg(struct mixart_mgr *mgr) 346{ 347 struct mixart_msg resp; 348 u32 msg, addr, type; 349 int err; 350 351 while (mgr->msg_fifo_readptr != mgr->msg_fifo_writeptr) { 352 msg = mgr->msg_fifo[mgr->msg_fifo_readptr]; 353 mgr->msg_fifo_readptr++; 354 mgr->msg_fifo_readptr %= MSG_FIFO_SIZE; 355 356 /* process the message ... */ 357 addr = msg & ~MSG_TYPE_MASK; 358 type = msg & MSG_TYPE_MASK; 359 360 switch (type) { 361 case MSG_TYPE_ANSWER: 362 /* answer to a message on that we did not wait for (send_msg_nonblock) */ 363 resp.message_id = 0; 364 resp.data = mixart_msg_data; 365 resp.size = sizeof(mixart_msg_data); 366 err = get_msg(mgr, &resp, addr); 367 if( err < 0 ) { 368 dev_err(&mgr->pci->dev, 369 "error(%d) reading mf %x\n", 370 err, msg); 371 break; 372 } 373 374 switch(resp.message_id) { 375 case MSG_STREAM_START_INPUT_STAGE_PACKET: 376 case MSG_STREAM_START_OUTPUT_STAGE_PACKET: 377 case MSG_STREAM_STOP_INPUT_STAGE_PACKET: 378 case MSG_STREAM_STOP_OUTPUT_STAGE_PACKET: 379 if(mixart_msg_data[0]) 380 dev_err(&mgr->pci->dev, 381 "error MSG_STREAM_ST***_***PUT_STAGE_PACKET status=%x\n", 382 mixart_msg_data[0]); 383 break; 384 default: 385 dev_dbg(&mgr->pci->dev, 386 "received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n", 387 msg, resp.message_id, resp.uid.object_id, resp.uid.desc, resp.size); 388 break; 389 } 390 break; 391 case MSG_TYPE_NOTIFY: 392 /* msg contains no address ! do not get_msg() ! */ 393 case MSG_TYPE_COMMAND: 394 /* get_msg() necessary */ 395 default: 396 dev_err(&mgr->pci->dev, 397 "doesn't know what to do with message %x\n", 398 msg); 399 } /* switch type */ 400 401 /* decrement counter */ 402 atomic_dec(&mgr->msg_processed); 403 404 } /* while there is a msg in fifo */ 405} 406 407 408irqreturn_t snd_mixart_interrupt(int irq, void *dev_id) 409{ 410 struct mixart_mgr *mgr = dev_id; 411 u32 it_reg; 412 413 it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET)); 414 if( !(it_reg & MIXART_OIDI) ) { 415 /* this device did not cause the interrupt */ 416 return IRQ_NONE; 417 } 418 419 /* mask all interrupts */ 420 writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET)); 421 422 /* outdoorbell register clear */ 423 it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET)); 424 writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET)); 425 426 /* clear interrupt */ 427 writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) ); 428 429 return IRQ_WAKE_THREAD; 430} 431 432irqreturn_t snd_mixart_threaded_irq(int irq, void *dev_id) 433{ 434 struct mixart_mgr *mgr = dev_id; 435 int err; 436 struct mixart_msg resp; 437 u32 msg; 438 439 mutex_lock(&mgr->lock); 440 /* process interrupt */ 441 while (retrieve_msg_frame(mgr, &msg)) { 442 443 switch (msg & MSG_TYPE_MASK) { 444 case MSG_TYPE_COMMAND: 445 resp.message_id = 0; 446 resp.data = mixart_msg_data; 447 resp.size = sizeof(mixart_msg_data); 448 err = get_msg(mgr, &resp, msg & ~MSG_TYPE_MASK); 449 if( err < 0 ) { 450 dev_err(&mgr->pci->dev, 451 "interrupt: error(%d) reading mf %x\n", 452 err, msg); 453 break; 454 } 455 456 if(resp.message_id == MSG_SERVICES_TIMER_NOTIFY) { 457 int i; 458 struct mixart_timer_notify *notify; 459 notify = (struct mixart_timer_notify *)mixart_msg_data; 460 461 for(i=0; i<notify->stream_count; i++) { 462 463 u32 buffer_id = notify->streams[i].buffer_id; 464 unsigned int chip_number = (buffer_id & MIXART_NOTIFY_CARD_MASK) >> MIXART_NOTIFY_CARD_OFFSET; /* card0 to 3 */ 465 unsigned int pcm_number = (buffer_id & MIXART_NOTIFY_PCM_MASK ) >> MIXART_NOTIFY_PCM_OFFSET; /* pcm0 to 3 */ 466 unsigned int sub_number = buffer_id & MIXART_NOTIFY_SUBS_MASK; /* 0 to MIXART_PLAYBACK_STREAMS */ 467 unsigned int is_capture = ((buffer_id & MIXART_NOTIFY_CAPT_MASK) != 0); /* playback == 0 / capture == 1 */ 468 469 struct snd_mixart *chip = mgr->chip[chip_number]; 470 struct mixart_stream *stream; 471 472 if ((chip_number >= mgr->num_cards) || (pcm_number >= MIXART_PCM_TOTAL) || (sub_number >= MIXART_PLAYBACK_STREAMS)) { 473 dev_err(&mgr->pci->dev, 474 "error MSG_SERVICES_TIMER_NOTIFY buffer_id (%x) pos(%d)\n", 475 buffer_id, notify->streams[i].sample_pos_low_part); 476 break; 477 } 478 479 if (is_capture) 480 stream = &chip->capture_stream[pcm_number]; 481 else 482 stream = &chip->playback_stream[pcm_number][sub_number]; 483 484 if (stream->substream && (stream->status == MIXART_STREAM_STATUS_RUNNING)) { 485 struct snd_pcm_runtime *runtime = stream->substream->runtime; 486 int elapsed = 0; 487 u64 sample_count = ((u64)notify->streams[i].sample_pos_high_part) << 32; 488 sample_count |= notify->streams[i].sample_pos_low_part; 489 490 while (1) { 491 u64 new_elapse_pos = stream->abs_period_elapsed + runtime->period_size; 492 493 if (new_elapse_pos > sample_count) { 494 break; /* while */ 495 } 496 else { 497 elapsed = 1; 498 stream->buf_periods++; 499 if (stream->buf_periods >= runtime->periods) 500 stream->buf_periods = 0; 501 502 stream->abs_period_elapsed = new_elapse_pos; 503 } 504 } 505 stream->buf_period_frag = (u32)( sample_count - stream->abs_period_elapsed ); 506 507 if(elapsed) { 508 mutex_unlock(&mgr->lock); 509 snd_pcm_period_elapsed(stream->substream); 510 mutex_lock(&mgr->lock); 511 } 512 } 513 } 514 break; 515 } 516 if(resp.message_id == MSG_SERVICES_REPORT_TRACES) { 517 if(resp.size > 1) { 518#ifndef __BIG_ENDIAN 519 /* Traces are text: the swapped msg_data has to be swapped back ! */ 520 int i; 521 for(i=0; i<(resp.size/4); i++) { 522 (mixart_msg_data)[i] = cpu_to_be32((mixart_msg_data)[i]); 523 } 524#endif 525 ((char*)mixart_msg_data)[resp.size - 1] = 0; 526 dev_dbg(&mgr->pci->dev, 527 "MIXART TRACE : %s\n", 528 (char *)mixart_msg_data); 529 } 530 break; 531 } 532 533 dev_dbg(&mgr->pci->dev, "command %x not handled\n", 534 resp.message_id); 535 break; 536 537 case MSG_TYPE_NOTIFY: 538 if(msg & MSG_CANCEL_NOTIFY_MASK) { 539 msg &= ~MSG_CANCEL_NOTIFY_MASK; 540 dev_err(&mgr->pci->dev, 541 "canceled notification %x !\n", msg); 542 } 543 /* no break, continue ! */ 544 case MSG_TYPE_ANSWER: 545 /* answer or notification to a message we are waiting for*/ 546 mutex_lock(&mgr->msg_lock); 547 if( (msg & ~MSG_TYPE_MASK) == mgr->pending_event ) { 548 wake_up(&mgr->msg_sleep); 549 mgr->pending_event = 0; 550 } 551 /* answer to a message we did't want to wait for */ 552 else { 553 mgr->msg_fifo[mgr->msg_fifo_writeptr] = msg; 554 mgr->msg_fifo_writeptr++; 555 mgr->msg_fifo_writeptr %= MSG_FIFO_SIZE; 556 snd_mixart_process_msg(mgr); 557 } 558 mutex_unlock(&mgr->msg_lock); 559 break; 560 case MSG_TYPE_REQUEST: 561 default: 562 dev_dbg(&mgr->pci->dev, 563 "interrupt received request %x\n", msg); 564 /* TODO : are there things to do here ? */ 565 break; 566 } /* switch on msg type */ 567 } /* while there are msgs */ 568 569 /* allow interrupt again */ 570 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET)); 571 572 mutex_unlock(&mgr->lock); 573 574 return IRQ_HANDLED; 575} 576 577 578void snd_mixart_init_mailbox(struct mixart_mgr *mgr) 579{ 580 writel( 0, MIXART_MEM( mgr, MSG_HOST_RSC_PROTECTION ) ); 581 writel( 0, MIXART_MEM( mgr, MSG_AGENT_RSC_PROTECTION ) ); 582 583 /* allow outbound messagebox to generate interrupts */ 584 if(mgr->irq >= 0) { 585 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET)); 586 } 587 return; 588} 589 590void snd_mixart_exit_mailbox(struct mixart_mgr *mgr) 591{ 592 /* no more interrupts on outbound messagebox */ 593 writel_le( MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET)); 594 return; 595} 596 597void snd_mixart_reset_board(struct mixart_mgr *mgr) 598{ 599 /* reset miXart */ 600 writel_be( 1, MIXART_REG(mgr, MIXART_BA1_BRUTAL_RESET_OFFSET) ); 601 return; 602} 603