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