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 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 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 76 static int get_msg(struct mixart_mgr *mgr, struct mixart_msg *resp, 77 u32 msg_frame_address ) 78 { 79 unsigned long flags; 80 u32 headptr; 81 u32 size; 82 int err; 83 #ifndef __BIG_ENDIAN 84 unsigned int i; 85 #endif 86 87 spin_lock_irqsave(&mgr->msg_lock, flags); 88 err = 0; 89 90 /* copy message descriptor from miXart to driver */ 91 size = readl_be(MIXART_MEM(mgr, msg_frame_address)); /* size of descriptor + response */ 92 resp->message_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 4)); /* dwMessageID */ 93 resp->uid.object_id = readl_be(MIXART_MEM(mgr, msg_frame_address + 8)); /* uidDest */ 94 resp->uid.desc = readl_be(MIXART_MEM(mgr, msg_frame_address + 12)); /* */ 95 96 if( (size < MSG_DESCRIPTOR_SIZE) || (resp->size < (size - MSG_DESCRIPTOR_SIZE))) { 97 err = -EINVAL; 98 dev_err(&mgr->pci->dev, 99 "problem with response size = %d\n", size); 100 goto _clean_exit; 101 } 102 size -= MSG_DESCRIPTOR_SIZE; 103 104 memcpy_fromio(resp->data, MIXART_MEM(mgr, msg_frame_address + MSG_HEADER_SIZE ), size); 105 resp->size = size; 106 107 /* swap if necessary */ 108 #ifndef __BIG_ENDIAN 109 size /= 4; /* u32 size */ 110 for(i=0; i < size; i++) { 111 ((u32*)resp->data)[i] = be32_to_cpu(((u32*)resp->data)[i]); 112 } 113 #endif 114 115 /* 116 * free message frame address 117 */ 118 headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD)); 119 120 if( (headptr < MSG_OUTBOUND_FREE_STACK) || ( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) { 121 err = -EINVAL; 122 goto _clean_exit; 123 } 124 125 /* give address back to outbound fifo */ 126 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr)); 127 128 /* increment the outbound free head */ 129 headptr += 4; 130 if( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) ) 131 headptr = MSG_OUTBOUND_FREE_STACK; 132 133 writel_be(headptr, MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD)); 134 135 _clean_exit: 136 spin_unlock_irqrestore(&mgr->msg_lock, flags); 137 138 return err; 139 } 140 141 142 /* 143 * send a message to miXart. return: the msg_frame used for this message 144 */ 145 /* call with mgr->msg_lock held! */ 146 static int send_msg( struct mixart_mgr *mgr, 147 struct mixart_msg *msg, 148 int max_answersize, 149 int mark_pending, 150 u32 *msg_event) 151 { 152 u32 headptr, tailptr; 153 u32 msg_frame_address; 154 int err, i; 155 156 if (snd_BUG_ON(msg->size % 4)) 157 return -EINVAL; 158 159 err = 0; 160 161 /* get message frame address */ 162 tailptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL)); 163 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_HEAD)); 164 165 if (tailptr == headptr) { 166 dev_err(&mgr->pci->dev, "error: no message frame available\n"); 167 return -EBUSY; 168 } 169 170 if( (tailptr < MSG_INBOUND_FREE_STACK) || (tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) { 171 return -EINVAL; 172 } 173 174 msg_frame_address = readl_be(MIXART_MEM(mgr, tailptr)); 175 writel(0, MIXART_MEM(mgr, tailptr)); /* set address to zero on this fifo position */ 176 177 /* increment the inbound free tail */ 178 tailptr += 4; 179 if( tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) ) 180 tailptr = MSG_INBOUND_FREE_STACK; 181 182 writel_be(tailptr, MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL)); 183 184 /* TODO : use memcpy_toio() with intermediate buffer to copy the message */ 185 186 /* copy message descriptor to card memory */ 187 writel_be( msg->size + MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address) ); /* size of descriptor + request */ 188 writel_be( msg->message_id , MIXART_MEM(mgr, msg_frame_address + 4) ); /* dwMessageID */ 189 writel_be( msg->uid.object_id, MIXART_MEM(mgr, msg_frame_address + 8) ); /* uidDest */ 190 writel_be( msg->uid.desc, MIXART_MEM(mgr, msg_frame_address + 12) ); /* */ 191 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 16) ); /* SizeHeader */ 192 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 20) ); /* OffsetDLL_T16 */ 193 writel_be( msg->size, MIXART_MEM(mgr, msg_frame_address + 24) ); /* SizeDLL_T16 */ 194 writel_be( MSG_DESCRIPTOR_SIZE, MIXART_MEM(mgr, msg_frame_address + 28) ); /* OffsetDLL_DRV */ 195 writel_be( 0, MIXART_MEM(mgr, msg_frame_address + 32) ); /* SizeDLL_DRV */ 196 writel_be( MSG_DESCRIPTOR_SIZE + max_answersize, MIXART_MEM(mgr, msg_frame_address + 36) ); /* dwExpectedAnswerSize */ 197 198 /* copy message data to card memory */ 199 for( i=0; i < msg->size; i+=4 ) { 200 writel_be( *(u32*)(msg->data + i), MIXART_MEM(mgr, MSG_HEADER_SIZE + msg_frame_address + i) ); 201 } 202 203 if( mark_pending ) { 204 if( *msg_event ) { 205 /* the pending event is the notification we wait for ! */ 206 mgr->pending_event = *msg_event; 207 } 208 else { 209 /* the pending event is the answer we wait for (same address than the request)! */ 210 mgr->pending_event = msg_frame_address; 211 212 /* copy address back to caller */ 213 *msg_event = msg_frame_address; 214 } 215 } 216 217 /* mark the frame as a request (will have an answer) */ 218 msg_frame_address |= MSG_TYPE_REQUEST; 219 220 /* post the frame */ 221 headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD)); 222 223 if( (headptr < MSG_INBOUND_POST_STACK) || (headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE))) { 224 return -EINVAL; 225 } 226 227 writel_be(msg_frame_address, MIXART_MEM(mgr, headptr)); 228 229 /* increment the inbound post head */ 230 headptr += 4; 231 if( headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) ) 232 headptr = MSG_INBOUND_POST_STACK; 233 234 writel_be(headptr, MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD)); 235 236 return 0; 237 } 238 239 240 int snd_mixart_send_msg(struct mixart_mgr *mgr, struct mixart_msg *request, int max_resp_size, void *resp_data) 241 { 242 struct mixart_msg resp; 243 u32 msg_frame = 0; /* set to 0, so it's no notification to wait for, but the answer */ 244 int err; 245 wait_queue_t wait; 246 long timeout; 247 248 mutex_lock(&mgr->msg_mutex); 249 250 init_waitqueue_entry(&wait, current); 251 252 spin_lock_irq(&mgr->msg_lock); 253 /* send the message */ 254 err = send_msg(mgr, request, max_resp_size, 1, &msg_frame); /* send and mark the answer pending */ 255 if (err) { 256 spin_unlock_irq(&mgr->msg_lock); 257 mutex_unlock(&mgr->msg_mutex); 258 return err; 259 } 260 261 set_current_state(TASK_UNINTERRUPTIBLE); 262 add_wait_queue(&mgr->msg_sleep, &wait); 263 spin_unlock_irq(&mgr->msg_lock); 264 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES); 265 remove_wait_queue(&mgr->msg_sleep, &wait); 266 267 if (! timeout) { 268 /* error - no ack */ 269 mutex_unlock(&mgr->msg_mutex); 270 dev_err(&mgr->pci->dev, 271 "error: no response on msg %x\n", msg_frame); 272 return -EIO; 273 } 274 275 /* retrieve the answer into the same struct mixart_msg */ 276 resp.message_id = 0; 277 resp.uid = (struct mixart_uid){0,0}; 278 resp.data = resp_data; 279 resp.size = max_resp_size; 280 281 err = get_msg(mgr, &resp, msg_frame); 282 283 if( request->message_id != resp.message_id ) 284 dev_err(&mgr->pci->dev, "RESPONSE ERROR!\n"); 285 286 mutex_unlock(&mgr->msg_mutex); 287 return err; 288 } 289 290 291 int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr, 292 struct mixart_msg *request, u32 notif_event) 293 { 294 int err; 295 wait_queue_t wait; 296 long timeout; 297 298 if (snd_BUG_ON(!notif_event)) 299 return -EINVAL; 300 if (snd_BUG_ON((notif_event & MSG_TYPE_MASK) != MSG_TYPE_NOTIFY)) 301 return -EINVAL; 302 if (snd_BUG_ON(notif_event & MSG_CANCEL_NOTIFY_MASK)) 303 return -EINVAL; 304 305 mutex_lock(&mgr->msg_mutex); 306 307 init_waitqueue_entry(&wait, current); 308 309 spin_lock_irq(&mgr->msg_lock); 310 /* send the message */ 311 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 1, ¬if_event); /* send and mark the notification event pending */ 312 if(err) { 313 spin_unlock_irq(&mgr->msg_lock); 314 mutex_unlock(&mgr->msg_mutex); 315 return err; 316 } 317 318 set_current_state(TASK_UNINTERRUPTIBLE); 319 add_wait_queue(&mgr->msg_sleep, &wait); 320 spin_unlock_irq(&mgr->msg_lock); 321 timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES); 322 remove_wait_queue(&mgr->msg_sleep, &wait); 323 324 if (! timeout) { 325 /* error - no ack */ 326 mutex_unlock(&mgr->msg_mutex); 327 dev_err(&mgr->pci->dev, 328 "error: notification %x not received\n", notif_event); 329 return -EIO; 330 } 331 332 mutex_unlock(&mgr->msg_mutex); 333 return 0; 334 } 335 336 337 int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request) 338 { 339 u32 message_frame; 340 unsigned long flags; 341 int err; 342 343 /* just send the message (do not mark it as a pending one) */ 344 spin_lock_irqsave(&mgr->msg_lock, flags); 345 err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 0, &message_frame); 346 spin_unlock_irqrestore(&mgr->msg_lock, flags); 347 348 /* the answer will be handled by snd_struct mixart_msgasklet() */ 349 atomic_inc(&mgr->msg_processed); 350 351 return err; 352 } 353 354 355 /* common buffer of tasklet and interrupt to send/receive messages */ 356 static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4]; 357 358 359 void snd_mixart_msg_tasklet(unsigned long arg) 360 { 361 struct mixart_mgr *mgr = ( struct mixart_mgr*)(arg); 362 struct mixart_msg resp; 363 u32 msg, addr, type; 364 int err; 365 366 spin_lock(&mgr->lock); 367 368 while (mgr->msg_fifo_readptr != mgr->msg_fifo_writeptr) { 369 msg = mgr->msg_fifo[mgr->msg_fifo_readptr]; 370 mgr->msg_fifo_readptr++; 371 mgr->msg_fifo_readptr %= MSG_FIFO_SIZE; 372 373 /* process the message ... */ 374 addr = msg & ~MSG_TYPE_MASK; 375 type = msg & MSG_TYPE_MASK; 376 377 switch (type) { 378 case MSG_TYPE_ANSWER: 379 /* answer to a message on that we did not wait for (send_msg_nonblock) */ 380 resp.message_id = 0; 381 resp.data = mixart_msg_data; 382 resp.size = sizeof(mixart_msg_data); 383 err = get_msg(mgr, &resp, addr); 384 if( err < 0 ) { 385 dev_err(&mgr->pci->dev, 386 "tasklet: error(%d) reading mf %x\n", 387 err, msg); 388 break; 389 } 390 391 switch(resp.message_id) { 392 case MSG_STREAM_START_INPUT_STAGE_PACKET: 393 case MSG_STREAM_START_OUTPUT_STAGE_PACKET: 394 case MSG_STREAM_STOP_INPUT_STAGE_PACKET: 395 case MSG_STREAM_STOP_OUTPUT_STAGE_PACKET: 396 if(mixart_msg_data[0]) 397 dev_err(&mgr->pci->dev, 398 "tasklet : error MSG_STREAM_ST***_***PUT_STAGE_PACKET status=%x\n", 399 mixart_msg_data[0]); 400 break; 401 default: 402 dev_dbg(&mgr->pci->dev, 403 "tasklet received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n", 404 msg, resp.message_id, resp.uid.object_id, resp.uid.desc, resp.size); 405 break; 406 } 407 break; 408 case MSG_TYPE_NOTIFY: 409 /* msg contains no address ! do not get_msg() ! */ 410 case MSG_TYPE_COMMAND: 411 /* get_msg() necessary */ 412 default: 413 dev_err(&mgr->pci->dev, 414 "tasklet doesn't know what to do with message %x\n", 415 msg); 416 } /* switch type */ 417 418 /* decrement counter */ 419 atomic_dec(&mgr->msg_processed); 420 421 } /* while there is a msg in fifo */ 422 423 spin_unlock(&mgr->lock); 424 } 425 426 427 irqreturn_t snd_mixart_interrupt(int irq, void *dev_id) 428 { 429 struct mixart_mgr *mgr = dev_id; 430 int err; 431 struct mixart_msg resp; 432 433 u32 msg; 434 u32 it_reg; 435 436 spin_lock(&mgr->lock); 437 438 it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET)); 439 if( !(it_reg & MIXART_OIDI) ) { 440 /* this device did not cause the interrupt */ 441 spin_unlock(&mgr->lock); 442 return IRQ_NONE; 443 } 444 445 /* mask all interrupts */ 446 writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET)); 447 448 /* outdoorbell register clear */ 449 it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET)); 450 writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET)); 451 452 /* clear interrupt */ 453 writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) ); 454 455 /* process interrupt */ 456 while (retrieve_msg_frame(mgr, &msg)) { 457 458 switch (msg & MSG_TYPE_MASK) { 459 case MSG_TYPE_COMMAND: 460 resp.message_id = 0; 461 resp.data = mixart_msg_data; 462 resp.size = sizeof(mixart_msg_data); 463 err = get_msg(mgr, &resp, msg & ~MSG_TYPE_MASK); 464 if( err < 0 ) { 465 dev_err(&mgr->pci->dev, 466 "interrupt: error(%d) reading mf %x\n", 467 err, msg); 468 break; 469 } 470 471 if(resp.message_id == MSG_SERVICES_TIMER_NOTIFY) { 472 int i; 473 struct mixart_timer_notify *notify; 474 notify = (struct mixart_timer_notify *)mixart_msg_data; 475 476 for(i=0; i<notify->stream_count; i++) { 477 478 u32 buffer_id = notify->streams[i].buffer_id; 479 unsigned int chip_number = (buffer_id & MIXART_NOTIFY_CARD_MASK) >> MIXART_NOTIFY_CARD_OFFSET; /* card0 to 3 */ 480 unsigned int pcm_number = (buffer_id & MIXART_NOTIFY_PCM_MASK ) >> MIXART_NOTIFY_PCM_OFFSET; /* pcm0 to 3 */ 481 unsigned int sub_number = buffer_id & MIXART_NOTIFY_SUBS_MASK; /* 0 to MIXART_PLAYBACK_STREAMS */ 482 unsigned int is_capture = ((buffer_id & MIXART_NOTIFY_CAPT_MASK) != 0); /* playback == 0 / capture == 1 */ 483 484 struct snd_mixart *chip = mgr->chip[chip_number]; 485 struct mixart_stream *stream; 486 487 if ((chip_number >= mgr->num_cards) || (pcm_number >= MIXART_PCM_TOTAL) || (sub_number >= MIXART_PLAYBACK_STREAMS)) { 488 dev_err(&mgr->pci->dev, 489 "error MSG_SERVICES_TIMER_NOTIFY buffer_id (%x) pos(%d)\n", 490 buffer_id, notify->streams[i].sample_pos_low_part); 491 break; 492 } 493 494 if (is_capture) 495 stream = &chip->capture_stream[pcm_number]; 496 else 497 stream = &chip->playback_stream[pcm_number][sub_number]; 498 499 if (stream->substream && (stream->status == MIXART_STREAM_STATUS_RUNNING)) { 500 struct snd_pcm_runtime *runtime = stream->substream->runtime; 501 int elapsed = 0; 502 u64 sample_count = ((u64)notify->streams[i].sample_pos_high_part) << 32; 503 sample_count |= notify->streams[i].sample_pos_low_part; 504 505 while (1) { 506 u64 new_elapse_pos = stream->abs_period_elapsed + runtime->period_size; 507 508 if (new_elapse_pos > sample_count) { 509 break; /* while */ 510 } 511 else { 512 elapsed = 1; 513 stream->buf_periods++; 514 if (stream->buf_periods >= runtime->periods) 515 stream->buf_periods = 0; 516 517 stream->abs_period_elapsed = new_elapse_pos; 518 } 519 } 520 stream->buf_period_frag = (u32)( sample_count - stream->abs_period_elapsed ); 521 522 if(elapsed) { 523 spin_unlock(&mgr->lock); 524 snd_pcm_period_elapsed(stream->substream); 525 spin_lock(&mgr->lock); 526 } 527 } 528 } 529 break; 530 } 531 if(resp.message_id == MSG_SERVICES_REPORT_TRACES) { 532 if(resp.size > 1) { 533 #ifndef __BIG_ENDIAN 534 /* Traces are text: the swapped msg_data has to be swapped back ! */ 535 int i; 536 for(i=0; i<(resp.size/4); i++) { 537 (mixart_msg_data)[i] = cpu_to_be32((mixart_msg_data)[i]); 538 } 539 #endif 540 ((char*)mixart_msg_data)[resp.size - 1] = 0; 541 dev_dbg(&mgr->pci->dev, 542 "MIXART TRACE : %s\n", 543 (char *)mixart_msg_data); 544 } 545 break; 546 } 547 548 dev_dbg(&mgr->pci->dev, "command %x not handled\n", 549 resp.message_id); 550 break; 551 552 case MSG_TYPE_NOTIFY: 553 if(msg & MSG_CANCEL_NOTIFY_MASK) { 554 msg &= ~MSG_CANCEL_NOTIFY_MASK; 555 dev_err(&mgr->pci->dev, 556 "canceled notification %x !\n", msg); 557 } 558 /* no break, continue ! */ 559 case MSG_TYPE_ANSWER: 560 /* answer or notification to a message we are waiting for*/ 561 spin_lock(&mgr->msg_lock); 562 if( (msg & ~MSG_TYPE_MASK) == mgr->pending_event ) { 563 wake_up(&mgr->msg_sleep); 564 mgr->pending_event = 0; 565 } 566 /* answer to a message we did't want to wait for */ 567 else { 568 mgr->msg_fifo[mgr->msg_fifo_writeptr] = msg; 569 mgr->msg_fifo_writeptr++; 570 mgr->msg_fifo_writeptr %= MSG_FIFO_SIZE; 571 tasklet_schedule(&mgr->msg_taskq); 572 } 573 spin_unlock(&mgr->msg_lock); 574 break; 575 case MSG_TYPE_REQUEST: 576 default: 577 dev_dbg(&mgr->pci->dev, 578 "interrupt received request %x\n", msg); 579 /* TODO : are there things to do here ? */ 580 break; 581 } /* switch on msg type */ 582 } /* while there are msgs */ 583 584 /* allow interrupt again */ 585 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET)); 586 587 spin_unlock(&mgr->lock); 588 589 return IRQ_HANDLED; 590 } 591 592 593 void snd_mixart_init_mailbox(struct mixart_mgr *mgr) 594 { 595 writel( 0, MIXART_MEM( mgr, MSG_HOST_RSC_PROTECTION ) ); 596 writel( 0, MIXART_MEM( mgr, MSG_AGENT_RSC_PROTECTION ) ); 597 598 /* allow outbound messagebox to generate interrupts */ 599 if(mgr->irq >= 0) { 600 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET)); 601 } 602 return; 603 } 604 605 void snd_mixart_exit_mailbox(struct mixart_mgr *mgr) 606 { 607 /* no more interrupts on outbound messagebox */ 608 writel_le( MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET)); 609 return; 610 } 611 612 void snd_mixart_reset_board(struct mixart_mgr *mgr) 613 { 614 /* reset miXart */ 615 writel_be( 1, MIXART_REG(mgr, MIXART_BA1_BRUTAL_RESET_OFFSET) ); 616 return; 617 } 618