sound/pci/mixart/mixart

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This source file includes following definitions.
retrieve_msg_frame
get_msg
send_msg
snd_mixart_send_msg
snd_mixart_send_msg_wait_notif
snd_mixart_send_msg_nonblock
snd_mixart_process_msg
snd_mixart_interrupt
snd_mixart_threaded_irq
snd_mixart_init_mailbox
snd_mixart_exit_mailbox
snd_mixart_reset_board
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Driver for Digigram miXart soundcards
   4  *
   5  * low level interface with interrupt handling and mail box implementation
   6  *
   7  * Copyright (c) 2003 by Digigram <alsa@digigram.com>
   8  */
   9 
  10 #include <linux/interrupt.h>
  11 #include <linux/mutex.h>
  12 #include <linux/pci.h>
  13 #include <linux/io.h>
  14 
  15 #include <sound/core.h>
  16 #include "mixart.h"
  17 #include "mixart_hwdep.h"
  18 #include "mixart_core.h"
  19 
  20 
  21 #define MSG_TIMEOUT_JIFFIES         (400 * HZ) / 1000 /* 400 ms */
  22 
  23 #define MSG_DESCRIPTOR_SIZE         0x24
  24 #define MSG_HEADER_SIZE             (MSG_DESCRIPTOR_SIZE + 4)
  25 
  26 #define MSG_DEFAULT_SIZE            512
  27 
  28 #define MSG_TYPE_MASK               0x00000003    /* mask for following types */
  29 #define MSG_TYPE_NOTIFY             0             /* embedded -> driver (only notification, do not get_msg() !) */
  30 #define MSG_TYPE_COMMAND            1             /* driver <-> embedded (a command has no answer) */
  31 #define MSG_TYPE_REQUEST            2             /* driver -> embedded (request will get an answer back) */
  32 #define MSG_TYPE_ANSWER             3             /* embedded -> driver */
  33 #define MSG_CANCEL_NOTIFY_MASK      0x80000000    /* this bit is set for a notification that has been canceled */
  34 
  35 
  36 static int retrieve_msg_frame(struct mixart_mgr *mgr, u32 *msg_frame)
  37 {
  38         /* read the message frame fifo */
  39         u32 headptr, tailptr;
  40 
  41         tailptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
  42         headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_POST_HEAD));
  43 
  44         if (tailptr == headptr)
  45                 return 0; /* no message posted */
  46 
  47         if (tailptr < MSG_OUTBOUND_POST_STACK)
  48                 return 0; /* error */
  49         if (tailptr >= MSG_OUTBOUND_POST_STACK + MSG_BOUND_STACK_SIZE)
  50                 return 0; /* error */
  51 
  52         *msg_frame = readl_be(MIXART_MEM(mgr, tailptr));
  53 
  54         /* increment the tail index */
  55         tailptr += 4;
  56         if( tailptr >= (MSG_OUTBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
  57                 tailptr = MSG_OUTBOUND_POST_STACK;
  58         writel_be(tailptr, MIXART_MEM(mgr, MSG_OUTBOUND_POST_TAIL));
  59 
  60         return 1;
  61 }
  62 
  63 static int get_msg(struct mixart_mgr *mgr, struct mixart_msg *resp,
  64                    u32 msg_frame_address )
  65 {
  66         u32  headptr;
  67         u32  size;
  68         int  err;
  69 #ifndef __BIG_ENDIAN
  70         unsigned int i;
  71 #endif
  72 
  73         mutex_lock(&mgr->msg_lock);
  74         err = 0;
  75 
  76         /* copy message descriptor from miXart to driver */
  77         size                =  readl_be(MIXART_MEM(mgr, msg_frame_address));       /* size of descriptor + response */
  78         resp->message_id    =  readl_be(MIXART_MEM(mgr, msg_frame_address + 4));   /* dwMessageID */
  79         resp->uid.object_id =  readl_be(MIXART_MEM(mgr, msg_frame_address + 8));   /* uidDest */
  80         resp->uid.desc      =  readl_be(MIXART_MEM(mgr, msg_frame_address + 12));  /* */
  81 
  82         if( (size < MSG_DESCRIPTOR_SIZE) || (resp->size < (size - MSG_DESCRIPTOR_SIZE))) {
  83                 err = -EINVAL;
  84                 dev_err(&mgr->pci->dev,
  85                         "problem with response size = %d\n", size);
  86                 goto _clean_exit;
  87         }
  88         size -= MSG_DESCRIPTOR_SIZE;
  89 
  90         memcpy_fromio(resp->data, MIXART_MEM(mgr, msg_frame_address + MSG_HEADER_SIZE ), size);
  91         resp->size = size;
  92 
  93         /* swap if necessary */
  94 #ifndef __BIG_ENDIAN
  95         size /= 4; /* u32 size */
  96         for(i=0; i < size; i++) {
  97                 ((u32*)resp->data)[i] = be32_to_cpu(((__be32*)resp->data)[i]);
  98         }
  99 #endif
 100 
 101         /*
 102          * free message frame address
 103          */
 104         headptr = readl_be(MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
 105 
 106         if( (headptr < MSG_OUTBOUND_FREE_STACK) || ( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
 107                 err = -EINVAL;
 108                 goto _clean_exit;
 109         }
 110 
 111         /* give address back to outbound fifo */
 112         writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
 113 
 114         /* increment the outbound free head */
 115         headptr += 4;
 116         if( headptr >= (MSG_OUTBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
 117                 headptr = MSG_OUTBOUND_FREE_STACK;
 118 
 119         writel_be(headptr, MIXART_MEM(mgr, MSG_OUTBOUND_FREE_HEAD));
 120 
 121  _clean_exit:
 122         mutex_unlock(&mgr->msg_lock);
 123 
 124         return err;
 125 }
 126 
 127 
 128 /*
 129  * send a message to miXart. return: the msg_frame used for this message
 130  */
 131 /* call with mgr->msg_lock held! */
 132 static int send_msg( struct mixart_mgr *mgr,
 133                      struct mixart_msg *msg,
 134                      int max_answersize,
 135                      int mark_pending,
 136                      u32 *msg_event)
 137 {
 138         u32 headptr, tailptr;
 139         u32 msg_frame_address;
 140         int i;
 141 
 142         if (snd_BUG_ON(msg->size % 4))
 143                 return -EINVAL;
 144 
 145         /* get message frame address */
 146         tailptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
 147         headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_FREE_HEAD));
 148 
 149         if (tailptr == headptr) {
 150                 dev_err(&mgr->pci->dev, "error: no message frame available\n");
 151                 return -EBUSY;
 152         }
 153 
 154         if( (tailptr < MSG_INBOUND_FREE_STACK) || (tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE))) {
 155                 return -EINVAL;
 156         }
 157 
 158         msg_frame_address = readl_be(MIXART_MEM(mgr, tailptr));
 159         writel(0, MIXART_MEM(mgr, tailptr)); /* set address to zero on this fifo position */
 160 
 161         /* increment the inbound free tail */
 162         tailptr += 4;
 163         if( tailptr >= (MSG_INBOUND_FREE_STACK+MSG_BOUND_STACK_SIZE) )
 164                 tailptr = MSG_INBOUND_FREE_STACK;
 165 
 166         writel_be(tailptr, MIXART_MEM(mgr, MSG_INBOUND_FREE_TAIL));
 167 
 168         /* TODO : use memcpy_toio() with intermediate buffer to copy the message */
 169 
 170         /* copy message descriptor to card memory */
 171         writel_be( msg->size + MSG_DESCRIPTOR_SIZE,      MIXART_MEM(mgr, msg_frame_address) );      /* size of descriptor + request */
 172         writel_be( msg->message_id ,                     MIXART_MEM(mgr, msg_frame_address + 4) );  /* dwMessageID */
 173         writel_be( msg->uid.object_id,                   MIXART_MEM(mgr, msg_frame_address + 8) );  /* uidDest */
 174         writel_be( msg->uid.desc,                        MIXART_MEM(mgr, msg_frame_address + 12) ); /* */
 175         writel_be( MSG_DESCRIPTOR_SIZE,                  MIXART_MEM(mgr, msg_frame_address + 16) ); /* SizeHeader */
 176         writel_be( MSG_DESCRIPTOR_SIZE,                  MIXART_MEM(mgr, msg_frame_address + 20) ); /* OffsetDLL_T16 */
 177         writel_be( msg->size,                            MIXART_MEM(mgr, msg_frame_address + 24) ); /* SizeDLL_T16 */
 178         writel_be( MSG_DESCRIPTOR_SIZE,                  MIXART_MEM(mgr, msg_frame_address + 28) ); /* OffsetDLL_DRV */
 179         writel_be( 0,                                    MIXART_MEM(mgr, msg_frame_address + 32) ); /* SizeDLL_DRV */
 180         writel_be( MSG_DESCRIPTOR_SIZE + max_answersize, MIXART_MEM(mgr, msg_frame_address + 36) ); /* dwExpectedAnswerSize */
 181 
 182         /* copy message data to card memory */
 183         for( i=0; i < msg->size; i+=4 ) {
 184                 writel_be( *(u32*)(msg->data + i), MIXART_MEM(mgr, MSG_HEADER_SIZE + msg_frame_address + i)  );
 185         }
 186 
 187         if( mark_pending ) {
 188                 if( *msg_event ) {
 189                         /* the pending event is the notification we wait for ! */
 190                         mgr->pending_event = *msg_event;
 191                 }
 192                 else {
 193                         /* the pending event is the answer we wait for (same address than the request)! */
 194                         mgr->pending_event = msg_frame_address;
 195 
 196                         /* copy address back to caller */
 197                         *msg_event = msg_frame_address;
 198                 }
 199         }
 200 
 201         /* mark the frame as a request (will have an answer) */
 202         msg_frame_address |= MSG_TYPE_REQUEST;
 203 
 204         /* post the frame */
 205         headptr = readl_be(MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
 206 
 207         if( (headptr < MSG_INBOUND_POST_STACK) || (headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE))) {
 208                 return -EINVAL;
 209         }
 210 
 211         writel_be(msg_frame_address, MIXART_MEM(mgr, headptr));
 212 
 213         /* increment the inbound post head */
 214         headptr += 4;
 215         if( headptr >= (MSG_INBOUND_POST_STACK+MSG_BOUND_STACK_SIZE) )
 216                 headptr = MSG_INBOUND_POST_STACK;
 217 
 218         writel_be(headptr, MIXART_MEM(mgr, MSG_INBOUND_POST_HEAD));
 219 
 220         return 0;
 221 }
 222 
 223 
 224 int snd_mixart_send_msg(struct mixart_mgr *mgr, struct mixart_msg *request, int max_resp_size, void *resp_data)
 225 {
 226         struct mixart_msg resp;
 227         u32 msg_frame = 0; /* set to 0, so it's no notification to wait for, but the answer */
 228         int err;
 229         wait_queue_entry_t wait;
 230         long timeout;
 231 
 232         init_waitqueue_entry(&wait, current);
 233 
 234         mutex_lock(&mgr->msg_lock);
 235         /* send the message */
 236         err = send_msg(mgr, request, max_resp_size, 1, &msg_frame);  /* send and mark the answer pending */
 237         if (err) {
 238                 mutex_unlock(&mgr->msg_lock);
 239                 return err;
 240         }
 241 
 242         set_current_state(TASK_UNINTERRUPTIBLE);
 243         add_wait_queue(&mgr->msg_sleep, &wait);
 244         mutex_unlock(&mgr->msg_lock);
 245         timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
 246         remove_wait_queue(&mgr->msg_sleep, &wait);
 247 
 248         if (! timeout) {
 249                 /* error - no ack */
 250                 dev_err(&mgr->pci->dev,
 251                         "error: no response on msg %x\n", msg_frame);
 252                 return -EIO;
 253         }
 254 
 255         /* retrieve the answer into the same struct mixart_msg */
 256         resp.message_id = 0;
 257         resp.uid = (struct mixart_uid){0,0};
 258         resp.data = resp_data;
 259         resp.size = max_resp_size;
 260 
 261         err = get_msg(mgr, &resp, msg_frame);
 262 
 263         if( request->message_id != resp.message_id )
 264                 dev_err(&mgr->pci->dev, "RESPONSE ERROR!\n");
 265 
 266         return err;
 267 }
 268 
 269 
 270 int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr,
 271                                    struct mixart_msg *request, u32 notif_event)
 272 {
 273         int err;
 274         wait_queue_entry_t wait;
 275         long timeout;
 276 
 277         if (snd_BUG_ON(!notif_event))
 278                 return -EINVAL;
 279         if (snd_BUG_ON((notif_event & MSG_TYPE_MASK) != MSG_TYPE_NOTIFY))
 280                 return -EINVAL;
 281         if (snd_BUG_ON(notif_event & MSG_CANCEL_NOTIFY_MASK))
 282                 return -EINVAL;
 283 
 284         init_waitqueue_entry(&wait, current);
 285 
 286         mutex_lock(&mgr->msg_lock);
 287         /* send the message */
 288         err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 1, &notif_event);  /* send and mark the notification event pending */
 289         if(err) {
 290                 mutex_unlock(&mgr->msg_lock);
 291                 return err;
 292         }
 293 
 294         set_current_state(TASK_UNINTERRUPTIBLE);
 295         add_wait_queue(&mgr->msg_sleep, &wait);
 296         mutex_unlock(&mgr->msg_lock);
 297         timeout = schedule_timeout(MSG_TIMEOUT_JIFFIES);
 298         remove_wait_queue(&mgr->msg_sleep, &wait);
 299 
 300         if (! timeout) {
 301                 /* error - no ack */
 302                 dev_err(&mgr->pci->dev,
 303                         "error: notification %x not received\n", notif_event);
 304                 return -EIO;
 305         }
 306 
 307         return 0;
 308 }
 309 
 310 
 311 int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request)
 312 {
 313         u32 message_frame;
 314         int err;
 315 
 316         /* just send the message (do not mark it as a pending one) */
 317         mutex_lock(&mgr->msg_lock);
 318         err = send_msg(mgr, request, MSG_DEFAULT_SIZE, 0, &message_frame);
 319         mutex_unlock(&mgr->msg_lock);
 320 
 321         /* the answer will be handled by snd_struct mixart_msgasklet()  */
 322         atomic_inc(&mgr->msg_processed);
 323 
 324         return err;
 325 }
 326 
 327 
 328 /* common buffer of interrupt to send/receive messages */
 329 static u32 mixart_msg_data[MSG_DEFAULT_SIZE / 4];
 330 
 331 
 332 static void snd_mixart_process_msg(struct mixart_mgr *mgr)
 333 {
 334         struct mixart_msg resp;
 335         u32 msg, addr, type;
 336         int err;
 337 
 338         while (mgr->msg_fifo_readptr != mgr->msg_fifo_writeptr) {
 339                 msg = mgr->msg_fifo[mgr->msg_fifo_readptr];
 340                 mgr->msg_fifo_readptr++;
 341                 mgr->msg_fifo_readptr %= MSG_FIFO_SIZE;
 342 
 343                 /* process the message ... */
 344                 addr = msg & ~MSG_TYPE_MASK;
 345                 type = msg & MSG_TYPE_MASK;
 346 
 347                 switch (type) {
 348                 case MSG_TYPE_ANSWER:
 349                         /* answer to a message on that we did not wait for (send_msg_nonblock) */
 350                         resp.message_id = 0;
 351                         resp.data = mixart_msg_data;
 352                         resp.size = sizeof(mixart_msg_data);
 353                         err = get_msg(mgr, &resp, addr);
 354                         if( err < 0 ) {
 355                                 dev_err(&mgr->pci->dev,
 356                                         "error(%d) reading mf %x\n",
 357                                         err, msg);
 358                                 break;
 359                         }
 360 
 361                         switch(resp.message_id) {
 362                         case MSG_STREAM_START_INPUT_STAGE_PACKET:
 363                         case MSG_STREAM_START_OUTPUT_STAGE_PACKET:
 364                         case MSG_STREAM_STOP_INPUT_STAGE_PACKET:
 365                         case MSG_STREAM_STOP_OUTPUT_STAGE_PACKET:
 366                                 if(mixart_msg_data[0])
 367                                         dev_err(&mgr->pci->dev,
 368                                                 "error MSG_STREAM_ST***_***PUT_STAGE_PACKET status=%x\n",
 369                                                 mixart_msg_data[0]);
 370                                 break;
 371                         default:
 372                                 dev_dbg(&mgr->pci->dev,
 373                                         "received mf(%x) : msg_id(%x) uid(%x, %x) size(%zd)\n",
 374                                            msg, resp.message_id, resp.uid.object_id, resp.uid.desc, resp.size);
 375                                 break;
 376                         }
 377                         break;
 378                 case MSG_TYPE_NOTIFY:
 379                         /* msg contains no address ! do not get_msg() ! */
 380                 case MSG_TYPE_COMMAND:
 381                         /* get_msg() necessary */
 382                 default:
 383                         dev_err(&mgr->pci->dev,
 384                                 "doesn't know what to do with message %x\n",
 385                                 msg);
 386                 } /* switch type */
 387 
 388                 /* decrement counter */
 389                 atomic_dec(&mgr->msg_processed);
 390 
 391         } /* while there is a msg in fifo */
 392 }
 393 
 394 
 395 irqreturn_t snd_mixart_interrupt(int irq, void *dev_id)
 396 {
 397         struct mixart_mgr *mgr = dev_id;
 398         u32 it_reg;
 399 
 400         it_reg = readl_le(MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET));
 401         if( !(it_reg & MIXART_OIDI) ) {
 402                 /* this device did not cause the interrupt */
 403                 return IRQ_NONE;
 404         }
 405 
 406         /* mask all interrupts */
 407         writel_le(MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG(mgr, MIXART_PCI_OMIMR_OFFSET));
 408 
 409         /* outdoorbell register clear */
 410         it_reg = readl(MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
 411         writel(it_reg, MIXART_REG(mgr, MIXART_PCI_ODBR_OFFSET));
 412 
 413         /* clear interrupt */
 414         writel_le( MIXART_OIDI, MIXART_REG(mgr, MIXART_PCI_OMISR_OFFSET) );
 415 
 416         return IRQ_WAKE_THREAD;
 417 }
 418 
 419 irqreturn_t snd_mixart_threaded_irq(int irq, void *dev_id)
 420 {
 421         struct mixart_mgr *mgr = dev_id;
 422         int err;
 423         struct mixart_msg resp;
 424         u32 msg;
 425 
 426         mutex_lock(&mgr->lock);
 427         /* process interrupt */
 428         while (retrieve_msg_frame(mgr, &msg)) {
 429 
 430                 switch (msg & MSG_TYPE_MASK) {
 431                 case MSG_TYPE_COMMAND:
 432                         resp.message_id = 0;
 433                         resp.data = mixart_msg_data;
 434                         resp.size = sizeof(mixart_msg_data);
 435                         err = get_msg(mgr, &resp, msg & ~MSG_TYPE_MASK);
 436                         if( err < 0 ) {
 437                                 dev_err(&mgr->pci->dev,
 438                                         "interrupt: error(%d) reading mf %x\n",
 439                                         err, msg);
 440                                 break;
 441                         }
 442 
 443                         if(resp.message_id == MSG_SERVICES_TIMER_NOTIFY) {
 444                                 int i;
 445                                 struct mixart_timer_notify *notify;
 446                                 notify = (struct mixart_timer_notify *)mixart_msg_data;
 447 
 448                                 for(i=0; i<notify->stream_count; i++) {
 449 
 450                                         u32 buffer_id = notify->streams[i].buffer_id;
 451                                         unsigned int chip_number =  (buffer_id & MIXART_NOTIFY_CARD_MASK) >> MIXART_NOTIFY_CARD_OFFSET; /* card0 to 3 */
 452                                         unsigned int pcm_number  =  (buffer_id & MIXART_NOTIFY_PCM_MASK ) >> MIXART_NOTIFY_PCM_OFFSET;  /* pcm0 to 3  */
 453                                         unsigned int sub_number  =   buffer_id & MIXART_NOTIFY_SUBS_MASK;             /* 0 to MIXART_PLAYBACK_STREAMS */
 454                                         unsigned int is_capture  = ((buffer_id & MIXART_NOTIFY_CAPT_MASK) != 0);      /* playback == 0 / capture == 1 */
 455 
 456                                         struct snd_mixart *chip  = mgr->chip[chip_number];
 457                                         struct mixart_stream *stream;
 458 
 459                                         if ((chip_number >= mgr->num_cards) || (pcm_number >= MIXART_PCM_TOTAL) || (sub_number >= MIXART_PLAYBACK_STREAMS)) {
 460                                                 dev_err(&mgr->pci->dev,
 461                                                         "error MSG_SERVICES_TIMER_NOTIFY buffer_id (%x) pos(%d)\n",
 462                                                            buffer_id, notify->streams[i].sample_pos_low_part);
 463                                                 break;
 464                                         }
 465 
 466                                         if (is_capture)
 467                                                 stream = &chip->capture_stream[pcm_number];
 468                                         else
 469                                                 stream = &chip->playback_stream[pcm_number][sub_number];
 470 
 471                                         if (stream->substream && (stream->status == MIXART_STREAM_STATUS_RUNNING)) {
 472                                                 struct snd_pcm_runtime *runtime = stream->substream->runtime;
 473                                                 int elapsed = 0;
 474                                                 u64 sample_count = ((u64)notify->streams[i].sample_pos_high_part) << 32;
 475                                                 sample_count |= notify->streams[i].sample_pos_low_part;
 476 
 477                                                 while (1) {
 478                                                         u64 new_elapse_pos = stream->abs_period_elapsed +  runtime->period_size;
 479 
 480                                                         if (new_elapse_pos > sample_count) {
 481                                                                 break; /* while */
 482                                                         }
 483                                                         else {
 484                                                                 elapsed = 1;
 485                                                                 stream->buf_periods++;
 486                                                                 if (stream->buf_periods >= runtime->periods)
 487                                                                         stream->buf_periods = 0;
 488 
 489                                                                 stream->abs_period_elapsed = new_elapse_pos;
 490                                                         }
 491                                                 }
 492                                                 stream->buf_period_frag = (u32)( sample_count - stream->abs_period_elapsed );
 493 
 494                                                 if(elapsed) {
 495                                                         mutex_unlock(&mgr->lock);
 496                                                         snd_pcm_period_elapsed(stream->substream);
 497                                                         mutex_lock(&mgr->lock);
 498                                                 }
 499                                         }
 500                                 }
 501                                 break;
 502                         }
 503                         if(resp.message_id == MSG_SERVICES_REPORT_TRACES) {
 504                                 if(resp.size > 1) {
 505 #ifndef __BIG_ENDIAN
 506                                         /* Traces are text: the swapped msg_data has to be swapped back ! */
 507                                         int i;
 508                                         for(i=0; i<(resp.size/4); i++) {
 509                                                 ((__be32*)mixart_msg_data)[i] = cpu_to_be32((mixart_msg_data)[i]);
 510                                         }
 511 #endif
 512                                         ((char*)mixart_msg_data)[resp.size - 1] = 0;
 513                                         dev_dbg(&mgr->pci->dev,
 514                                                 "MIXART TRACE : %s\n",
 515                                                 (char *)mixart_msg_data);
 516                                 }
 517                                 break;
 518                         }
 519 
 520                         dev_dbg(&mgr->pci->dev, "command %x not handled\n",
 521                                 resp.message_id);
 522                         break;
 523 
 524                 case MSG_TYPE_NOTIFY:
 525                         if(msg & MSG_CANCEL_NOTIFY_MASK) {
 526                                 msg &= ~MSG_CANCEL_NOTIFY_MASK;
 527                                 dev_err(&mgr->pci->dev,
 528                                         "canceled notification %x !\n", msg);
 529                         }
 530                         /* fall through */
 531                 case MSG_TYPE_ANSWER:
 532                         /* answer or notification to a message we are waiting for*/
 533                         mutex_lock(&mgr->msg_lock);
 534                         if( (msg & ~MSG_TYPE_MASK) == mgr->pending_event ) {
 535                                 wake_up(&mgr->msg_sleep);
 536                                 mgr->pending_event = 0;
 537                         }
 538                         /* answer to a message we did't want to wait for */
 539                         else {
 540                                 mgr->msg_fifo[mgr->msg_fifo_writeptr] = msg;
 541                                 mgr->msg_fifo_writeptr++;
 542                                 mgr->msg_fifo_writeptr %= MSG_FIFO_SIZE;
 543                                 snd_mixart_process_msg(mgr);
 544                         }
 545                         mutex_unlock(&mgr->msg_lock);
 546                         break;
 547                 case MSG_TYPE_REQUEST:
 548                 default:
 549                         dev_dbg(&mgr->pci->dev,
 550                                 "interrupt received request %x\n", msg);
 551                         /* TODO : are there things to do here ? */
 552                         break;
 553                 } /* switch on msg type */
 554         } /* while there are msgs */
 555 
 556         /* allow interrupt again */
 557         writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
 558 
 559         mutex_unlock(&mgr->lock);
 560 
 561         return IRQ_HANDLED;
 562 }
 563 
 564 
 565 void snd_mixart_init_mailbox(struct mixart_mgr *mgr)
 566 {
 567         writel( 0, MIXART_MEM( mgr, MSG_HOST_RSC_PROTECTION ) );
 568         writel( 0, MIXART_MEM( mgr, MSG_AGENT_RSC_PROTECTION ) );
 569 
 570         /* allow outbound messagebox to generate interrupts */
 571         if(mgr->irq >= 0) {
 572                 writel_le( MIXART_ALLOW_OUTBOUND_DOORBELL, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
 573         }
 574         return;
 575 }
 576 
 577 void snd_mixart_exit_mailbox(struct mixart_mgr *mgr)
 578 {
 579         /* no more interrupts on outbound messagebox */
 580         writel_le( MIXART_HOST_ALL_INTERRUPT_MASKED, MIXART_REG( mgr, MIXART_PCI_OMIMR_OFFSET));
 581         return;
 582 }
 583 
 584 void snd_mixart_reset_board(struct mixart_mgr *mgr)
 585 {
 586         /* reset miXart */
 587         writel_be( 1, MIXART_REG(mgr, MIXART_BA1_BRUTAL_RESET_OFFSET) );
 588         return;
 589 }
/* [<][>][^][v][top][bottom][index][help] */
root/sound/pci/mixart/mixart_core.c

DEFINITIONS
