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