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