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   1 /*
   2     btaudio - bt878 audio dma driver for linux 2.4.x
   3
   4     (c) 2000-2002 Gerd Knorr <kraxel@bytesex.org>
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20 */
  21
  22 #include <linux/module.h>
  23 #include <linux/errno.h>
  24 #include <linux/pci.h>
  25 #include <linux/sched.h>
  26 #include <linux/signal.h>
  27 #include <linux/types.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/init.h>
  30 #include <linux/poll.h>
  31 #include <linux/sound.h>
  32 #include <linux/soundcard.h>
  33 #include <linux/slab.h>
  34 #include <linux/kdev_t.h>
  35 #include <linux/mutex.h>
  36
  37 #include <asm/uaccess.h>
  38 #include <asm/io.h>
  39
  40
  41 /* mmio access */
  42 #define btwrite(dat,adr)    writel((dat), (bta->mmio+(adr)))
  43 #define btread(adr)         readl(bta->mmio+(adr))
  44
  45 #define btand(dat,adr)      btwrite((dat) & btread(adr), adr)
  46 #define btor(dat,adr)       btwrite((dat) | btread(adr), adr)
  47 #define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr)
  48
  49 /* registers (shifted because bta->mmio is long) */
  50 #define REG_INT_STAT      (0x100 >> 2)
  51 #define REG_INT_MASK      (0x104 >> 2)
  52 #define REG_GPIO_DMA_CTL  (0x10c >> 2)
  53 #define REG_PACKET_LEN    (0x110 >> 2)
  54 #define REG_RISC_STRT_ADD (0x114 >> 2)
  55 #define REG_RISC_COUNT    (0x120 >> 2)
  56
  57 /* IRQ bits - REG_INT_(STAT|MASK) */
  58 #define IRQ_SCERR         (1 << 19)
  59 #define IRQ_OCERR         (1 << 18)
  60 #define IRQ_PABORT        (1 << 17)
  61 #define IRQ_RIPERR        (1 << 16)
  62 #define IRQ_PPERR         (1 << 15)
  63 #define IRQ_FDSR          (1 << 14)
  64 #define IRQ_FTRGT         (1 << 13)
  65 #define IRQ_FBUS          (1 << 12)
  66 #define IRQ_RISCI         (1 << 11)
  67 #define IRQ_OFLOW         (1 <<  3)
  68
  69 #define IRQ_BTAUDIO       (IRQ_SCERR | IRQ_OCERR | IRQ_PABORT | IRQ_RIPERR |\
  70                            IRQ_PPERR | IRQ_FDSR  | IRQ_FTRGT  | IRQ_FBUS   |\
  71                            IRQ_RISCI)
  72
  73 /* REG_GPIO_DMA_CTL bits */
  74 #define DMA_CTL_A_PWRDN   (1 << 26)
  75 #define DMA_CTL_DA_SBR    (1 << 14)
  76 #define DMA_CTL_DA_ES2    (1 << 13)
  77 #define DMA_CTL_ACAP_EN   (1 <<  4)
  78 #define DMA_CTL_RISC_EN   (1 <<  1)
  79 #define DMA_CTL_FIFO_EN   (1 <<  0)
  80
  81 /* RISC instructions */
  82 #define RISC_WRITE        (0x01 << 28)
  83 #define RISC_JUMP         (0x07 << 28)
  84 #define RISC_SYNC         (0x08 << 28)
  85
  86 /* RISC bits */
  87 #define RISC_WR_SOL       (1 << 27)
  88 #define RISC_WR_EOL       (1 << 26)
  89 #define RISC_IRQ          (1 << 24)
  90 #define RISC_SYNC_RESYNC  (1 << 15)
  91 #define RISC_SYNC_FM1     0x06
  92 #define RISC_SYNC_VRO     0x0c
  93
  94 #define HWBASE_AD (448000)
  95
  96 /* -------------------------------------------------------------- */
  97
  98 struct btaudio {
  99         /* linked list */
 100         struct btaudio *next;
 101
 102         /* device info */
 103         int            dsp_digital;
 104         int            dsp_analog;
 105         int            mixer_dev;
 106         struct pci_dev *pci;
 107         unsigned int   irq;
 108         unsigned long  mem;
 109         unsigned long  __iomem *mmio;
 110
 111         /* locking */
 112         int            users;
 113         struct mutex lock;
 114
 115         /* risc instructions */
 116         unsigned int   risc_size;
 117         unsigned long  *risc_cpu;
 118         dma_addr_t     risc_dma;
 119
 120         /* audio data */
 121         unsigned int   buf_size;
 122         unsigned char  *buf_cpu;
 123         dma_addr_t     buf_dma;
 124
 125         /* buffer setup */
 126         int line_bytes;
 127         int line_count;
 128         int block_bytes;
 129         int block_count;
 130
 131         /* read fifo management */
 132         int recording;
 133         int dma_block;
 134         int read_offset;
 135         int read_count;
 136         wait_queue_head_t readq;
 137
 138         /* settings */
 139         int gain[3];
 140         int source;
 141         int bits;
 142         int decimation;
 143         int mixcount;
 144         int sampleshift;
 145         int channels;
 146         int analog;
 147         int rate;
 148 };
 149
 150 struct cardinfo {
 151         char *name;
 152         int rate;
 153 };
 154
 155 static struct btaudio *btaudios;
 156 static unsigned int debug;
 157 static unsigned int irq_debug;
 158
 159 /* -------------------------------------------------------------- */
 160
 161 #define BUF_DEFAULT 128*1024
 162 #define BUF_MIN         8192
 163
 164 static int alloc_buffer(struct btaudio *bta)
 165 {
 166         if (NULL == bta->buf_cpu) {
 167                 for (bta->buf_size = BUF_DEFAULT; bta->buf_size >= BUF_MIN;
 168                      bta->buf_size = bta->buf_size >> 1) {
 169                         bta->buf_cpu = pci_alloc_consistent
 170                                 (bta->pci, bta->buf_size, &bta->buf_dma);
 171                         if (NULL != bta->buf_cpu)
 172                                 break;
 173                 }
 174                 if (NULL == bta->buf_cpu)
 175                         return -ENOMEM;
 176                 memset(bta->buf_cpu,0,bta->buf_size);
 177         }
 178         if (NULL == bta->risc_cpu) {
 179                 bta->risc_size = PAGE_SIZE;
 180                 bta->risc_cpu = pci_alloc_consistent
 181                         (bta->pci, bta->risc_size, &bta->risc_dma);
 182                 if (NULL == bta->risc_cpu) {
 183                         pci_free_consistent(bta->pci, bta->buf_size, bta->buf_cpu, bta->buf_dma);
 184                         bta->buf_cpu = NULL;
 185                         return -ENOMEM;
 186                 }
 187         }
 188         return 0;
 189 }
 190
 191 static void free_buffer(struct btaudio *bta)
 192 {
 193         if (NULL != bta->buf_cpu) {
 194                 pci_free_consistent(bta->pci, bta->buf_size,
 195                                     bta->buf_cpu, bta->buf_dma);
 196                 bta->buf_cpu = NULL;
 197         }
 198         if (NULL != bta->risc_cpu) {
 199                 pci_free_consistent(bta->pci, bta->risc_size,
 200                                     bta->risc_cpu, bta->risc_dma);
 201                 bta->risc_cpu = NULL;
 202         }
 203 }
 204
 205 static int make_risc(struct btaudio *bta)
 206 {
 207         int rp, bp, line, block;
 208         unsigned long risc;
 209
 210         bta->block_bytes = bta->buf_size >> 4;
 211         bta->block_count = 1 << 4;
 212         bta->line_bytes  = bta->block_bytes;
 213         bta->line_count  = bta->block_count;
 214         while (bta->line_bytes > 4095) {
 215                 bta->line_bytes >>= 1;
 216                 bta->line_count <<= 1;
 217         }
 218         if (bta->line_count > 255)
 219                 return -EINVAL;
 220         if (debug)
 221                 printk(KERN_DEBUG
 222                        "btaudio: bufsize=%d - bs=%d bc=%d - ls=%d, lc=%d\n",
 223                        bta->buf_size,bta->block_bytes,bta->block_count,
 224                        bta->line_bytes,bta->line_count);
 225         rp = 0; bp = 0;
 226         block = 0;
 227         bta->risc_cpu[rp++] = cpu_to_le32(RISC_SYNC|RISC_SYNC_FM1);
 228         bta->risc_cpu[rp++] = cpu_to_le32(0);
 229         for (line = 0; line < bta->line_count; line++) {
 230                 risc  = RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL;
 231                 risc |= bta->line_bytes;
 232                 if (0 == (bp & (bta->block_bytes-1))) {
 233                         risc |= RISC_IRQ;
 234                         risc |= (block  & 0x0f) << 16;
 235                         risc |= (~block & 0x0f) << 20;
 236                         block++;
 237                 }
 238                 bta->risc_cpu[rp++] = cpu_to_le32(risc);
 239                 bta->risc_cpu[rp++] = cpu_to_le32(bta->buf_dma + bp);
 240                 bp += bta->line_bytes;
 241         }
 242         bta->risc_cpu[rp++] = cpu_to_le32(RISC_SYNC|RISC_SYNC_VRO);
 243         bta->risc_cpu[rp++] = cpu_to_le32(0);
 244         bta->risc_cpu[rp++] = cpu_to_le32(RISC_JUMP);
 245         bta->risc_cpu[rp++] = cpu_to_le32(bta->risc_dma);
 246         return 0;
 247 }
 248
 249 static int start_recording(struct btaudio *bta)
 250 {
 251         int ret;
 252
 253         if (0 != (ret = alloc_buffer(bta)))
 254                 return ret;
 255         if (0 != (ret = make_risc(bta)))
 256                 return ret;
 257
 258         btwrite(bta->risc_dma, REG_RISC_STRT_ADD);
 259         btwrite((bta->line_count << 16) | bta->line_bytes,
 260                 REG_PACKET_LEN);
 261         btwrite(IRQ_BTAUDIO, REG_INT_MASK);
 262         if (bta->analog) {
 263                 btwrite(DMA_CTL_ACAP_EN |
 264                         DMA_CTL_RISC_EN |
 265                         DMA_CTL_FIFO_EN |
 266                         DMA_CTL_DA_ES2  |
 267                         ((bta->bits == 8) ? DMA_CTL_DA_SBR : 0) |
 268                         (bta->gain[bta->source] << 28) |
 269                         (bta->source            << 24) |
 270                         (bta->decimation        <<  8),
 271                         REG_GPIO_DMA_CTL);
 272         } else {
 273                 btwrite(DMA_CTL_ACAP_EN |
 274                         DMA_CTL_RISC_EN |
 275                         DMA_CTL_FIFO_EN |
 276                         DMA_CTL_DA_ES2  |
 277                         DMA_CTL_A_PWRDN |
 278                         (1 << 6)   |
 279                         ((bta->bits == 8) ? DMA_CTL_DA_SBR : 0) |
 280                         (bta->gain[bta->source] << 28) |
 281                         (bta->source            << 24) |
 282                         (bta->decimation        <<  8),
 283                         REG_GPIO_DMA_CTL);
 284         }
 285         bta->dma_block = 0;
 286         bta->read_offset = 0;
 287         bta->read_count = 0;
 288         bta->recording = 1;
 289         if (debug)
 290                 printk(KERN_DEBUG "btaudio: recording started\n");
 291         return 0;
 292 }
 293
 294 static void stop_recording(struct btaudio *bta)
 295 {
 296         btand(~15, REG_GPIO_DMA_CTL);
 297         bta->recording = 0;
 298         if (debug)
 299                 printk(KERN_DEBUG "btaudio: recording stopped\n");
 300 }
 301
 302
 303 /* -------------------------------------------------------------- */
 304
 305 static int btaudio_mixer_open(struct inode *inode, struct file *file)
 306 {
 307         int minor = iminor(inode);
 308         struct btaudio *bta;
 309
 310         for (bta = btaudios; bta != NULL; bta = bta->next)
 311                 if (bta->mixer_dev == minor)
 312                         break;
 313         if (NULL == bta)
 314                 return -ENODEV;
 315
 316         if (debug)
 317                 printk("btaudio: open mixer [%d]\n",minor);
 318         file->private_data = bta;
 319         return 0;
 320 }
 321
 322 static int btaudio_mixer_release(struct inode *inode, struct file *file)
 323 {
 324         return 0;
 325 }
 326
 327 static int btaudio_mixer_ioctl(struct inode *inode, struct file *file,
 328                                unsigned int cmd, unsigned long arg)
 329 {
 330         struct btaudio *bta = file->private_data;
 331         int ret,val=0,i=0;
 332         void __user *argp = (void __user *)arg;
 333
 334         if (cmd == SOUND_MIXER_INFO) {
 335                 mixer_info info;
 336                 memset(&info,0,sizeof(info));
 337                 strlcpy(info.id,"bt878",sizeof(info.id));
 338                 strlcpy(info.name,"Brooktree Bt878 audio",sizeof(info.name));
 339                 info.modify_counter = bta->mixcount;
 340                 if (copy_to_user(argp, &info, sizeof(info)))
 341                         return -EFAULT;
 342                 return 0;
 343         }
 344         if (cmd == SOUND_OLD_MIXER_INFO) {
 345                 _old_mixer_info info;
 346                 memset(&info,0,sizeof(info));
 347                 strlcpy(info.id,"bt878",sizeof(info.id)-1);
 348                 strlcpy(info.name,"Brooktree Bt878 audio",sizeof(info.name));
 349                 if (copy_to_user(argp, &info, sizeof(info)))
 350                         return -EFAULT;
 351                 return 0;
 352         }
 353         if (cmd == OSS_GETVERSION)
 354                 return put_user(SOUND_VERSION, (int __user *)argp);
 355
 356         /* read */
 357         if (_SIOC_DIR(cmd) & _SIOC_WRITE)
 358                 if (get_user(val, (int __user *)argp))
 359                         return -EFAULT;
 360
 361         switch (cmd) {
 362         case MIXER_READ(SOUND_MIXER_CAPS):
 363                 ret = SOUND_CAP_EXCL_INPUT;
 364                 break;
 365         case MIXER_READ(SOUND_MIXER_STEREODEVS):
 366                 ret = 0;
 367                 break;
 368         case MIXER_READ(SOUND_MIXER_RECMASK):
 369         case MIXER_READ(SOUND_MIXER_DEVMASK):
 370                 ret = SOUND_MASK_LINE1|SOUND_MASK_LINE2|SOUND_MASK_LINE3;
 371                 break;
 372
 373         case MIXER_WRITE(SOUND_MIXER_RECSRC):
 374                 if (val & SOUND_MASK_LINE1 && bta->source != 0)
 375                         bta->source = 0;
 376                 else if (val & SOUND_MASK_LINE2 && bta->source != 1)
 377                         bta->source = 1;
 378                 else if (val & SOUND_MASK_LINE3 && bta->source != 2)
 379                         bta->source = 2;
 380                 btaor((bta->gain[bta->source] << 28) |
 381                       (bta->source            << 24),
 382                       0x0cffffff, REG_GPIO_DMA_CTL);
 383         case MIXER_READ(SOUND_MIXER_RECSRC):
 384                 switch (bta->source) {
 385                 case 0:  ret = SOUND_MASK_LINE1; break;
 386                 case 1:  ret = SOUND_MASK_LINE2; break;
 387                 case 2:  ret = SOUND_MASK_LINE3; break;
 388                 default: ret = 0;
 389                 }
 390                 break;
 391
 392         case MIXER_WRITE(SOUND_MIXER_LINE1):
 393         case MIXER_WRITE(SOUND_MIXER_LINE2):
 394         case MIXER_WRITE(SOUND_MIXER_LINE3):
 395                 if (MIXER_WRITE(SOUND_MIXER_LINE1) == cmd)
 396                         i = 0;
 397                 if (MIXER_WRITE(SOUND_MIXER_LINE2) == cmd)
 398                         i = 1;
 399                 if (MIXER_WRITE(SOUND_MIXER_LINE3) == cmd)
 400                         i = 2;
 401                 bta->gain[i] = (val & 0xff) * 15 / 100;
 402                 if (bta->gain[i] > 15) bta->gain[i] = 15;
 403                 if (bta->gain[i] <  0) bta->gain[i] =  0;
 404                 if (i == bta->source)
 405                         btaor((bta->gain[bta->source]<<28),
 406                               0x0fffffff, REG_GPIO_DMA_CTL);
 407                 ret  = bta->gain[i] * 100 / 15;
 408                 ret |= ret << 8;
 409                 break;
 410
 411         case MIXER_READ(SOUND_MIXER_LINE1):
 412         case MIXER_READ(SOUND_MIXER_LINE2):
 413         case MIXER_READ(SOUND_MIXER_LINE3):
 414                 if (MIXER_READ(SOUND_MIXER_LINE1) == cmd)
 415                         i = 0;
 416                 if (MIXER_READ(SOUND_MIXER_LINE2) == cmd)
 417                         i = 1;
 418                 if (MIXER_READ(SOUND_MIXER_LINE3) == cmd)
 419                         i = 2;
 420                 ret  = bta->gain[i] * 100 / 15;
 421                 ret |= ret << 8;
 422                 break;
 423
 424         default:
 425                 return -EINVAL;
 426         }
 427         if (put_user(ret, (int __user *)argp))
 428                 return -EFAULT;
 429         return 0;
 430 }
 431
 432 static struct file_operations btaudio_mixer_fops = {
 433         .owner          = THIS_MODULE,
 434         .llseek         = no_llseek,
 435         .open           = btaudio_mixer_open,
 436         .release        = btaudio_mixer_release,
 437         .ioctl          = btaudio_mixer_ioctl,
 438 };
 439
 440 /* -------------------------------------------------------------- */
 441
 442 static int btaudio_dsp_open(struct inode *inode, struct file *file,
 443                             struct btaudio *bta, int analog)
 444 {
 445         mutex_lock(&bta->lock);
 446         if (bta->users)
 447                 goto busy;
 448         bta->users++;
 449         file->private_data = bta;
 450
 451         bta->analog = analog;
 452         bta->dma_block = 0;
 453         bta->read_offset = 0;
 454         bta->read_count = 0;
 455         bta->sampleshift = 0;
 456
 457         mutex_unlock(&bta->lock);
 458         return 0;
 459
 460  busy:
 461         mutex_unlock(&bta->lock);
 462         return -EBUSY;
 463 }
 464
 465 static int btaudio_dsp_open_digital(struct inode *inode, struct file *file)
 466 {
 467         int minor = iminor(inode);
 468         struct btaudio *bta;
 469
 470         for (bta = btaudios; bta != NULL; bta = bta->next)
 471                 if (bta->dsp_digital == minor)
 472                         break;
 473         if (NULL == bta)
 474                 return -ENODEV;
 475
 476         if (debug)
 477                 printk("btaudio: open digital dsp [%d]\n",minor);
 478         return btaudio_dsp_open(inode,file,bta,0);
 479 }
 480
 481 static int btaudio_dsp_open_analog(struct inode *inode, struct file *file)
 482 {
 483         int minor = iminor(inode);
 484         struct btaudio *bta;
 485
 486         for (bta = btaudios; bta != NULL; bta = bta->next)
 487                 if (bta->dsp_analog == minor)
 488                         break;
 489         if (NULL == bta)
 490                 return -ENODEV;
 491
 492         if (debug)
 493                 printk("btaudio: open analog dsp [%d]\n",minor);
 494         return btaudio_dsp_open(inode,file,bta,1);
 495 }
 496
 497 static int btaudio_dsp_release(struct inode *inode, struct file *file)
 498 {
 499         struct btaudio *bta = file->private_data;
 500
 501         mutex_lock(&bta->lock);
 502         if (bta->recording)
 503                 stop_recording(bta);
 504         bta->users--;
 505         mutex_unlock(&bta->lock);
 506         return 0;
 507 }
 508
 509 static ssize_t btaudio_dsp_read(struct file *file, char __user *buffer,
 510                                 size_t swcount, loff_t *ppos)
 511 {
 512         struct btaudio *bta = file->private_data;
 513         int hwcount = swcount << bta->sampleshift;
 514         int nsrc, ndst, err, ret = 0;
 515         DECLARE_WAITQUEUE(wait, current);
 516
 517         add_wait_queue(&bta->readq, &wait);
 518         mutex_lock(&bta->lock);
 519         while (swcount > 0) {
 520                 if (0 == bta->read_count) {
 521                         if (!bta->recording) {
 522                                 if (0 != (err = start_recording(bta))) {
 523                                         if (0 == ret)
 524                                                 ret = err;
 525                                         break;
 526                                 }
 527                         }
 528                         if (file->f_flags & O_NONBLOCK) {
 529                                 if (0 == ret)
 530                                         ret = -EAGAIN;
 531                                 break;
 532                         }
 533                         mutex_unlock(&bta->lock);
 534                         current->state = TASK_INTERRUPTIBLE;
 535                         schedule();
 536                         mutex_lock(&bta->lock);
 537                         if(signal_pending(current)) {
 538                                 if (0 == ret)
 539                                         ret = -EINTR;
 540                                 break;
 541                         }
 542                 }
 543                 nsrc = (bta->read_count < hwcount) ? bta->read_count : hwcount;
 544                 if (nsrc > bta->buf_size - bta->read_offset)
 545                         nsrc = bta->buf_size - bta->read_offset;
 546                 ndst = nsrc >> bta->sampleshift;
 547
 548                 if ((bta->analog  && 0 == bta->sampleshift) ||
 549                     (!bta->analog && 2 == bta->channels)) {
 550                         /* just copy */
 551                         if (copy_to_user(buffer + ret, bta->buf_cpu + bta->read_offset, nsrc)) {
 552                                 if (0 == ret)
 553                                         ret = -EFAULT;
 554                                 break;
 555                         }
 556
 557                 } else if (!bta->analog) {
 558                         /* stereo => mono (digital audio) */
 559                         __s16 *src = (__s16*)(bta->buf_cpu + bta->read_offset);
 560                         __s16 __user *dst = (__s16 __user *)(buffer + ret);
 561                         __s16 avg;
 562                         int n = ndst>>1;
 563                         if (!access_ok(VERIFY_WRITE, dst, ndst)) {
 564                                 if (0 == ret)
 565                                         ret = -EFAULT;
 566                                 break;
 567                         }
 568                         for (; n; n--, dst++) {
 569                                 avg  = (__s16)le16_to_cpu(*src) / 2; src++;
 570                                 avg += (__s16)le16_to_cpu(*src) / 2; src++;
 571                                 __put_user(cpu_to_le16(avg),dst);
 572                         }
 573
 574                 } else if (8 == bta->bits) {
 575                         /* copy + byte downsampling (audio A/D) */
 576                         __u8 *src = bta->buf_cpu + bta->read_offset;
 577                         __u8 __user *dst = buffer + ret;
 578                         int n = ndst;
 579                         if (!access_ok(VERIFY_WRITE, dst, ndst)) {
 580                                 if (0 == ret)
 581                                         ret = -EFAULT;
 582                                 break;
 583                         }
 584                         for (; n; n--, src += (1 << bta->sampleshift), dst++)
 585                                 __put_user(*src, dst);
 586
 587                 } else {
 588                         /* copy + word downsampling (audio A/D) */
 589                         __u16 *src = (__u16*)(bta->buf_cpu + bta->read_offset);
 590                         __u16 __user *dst = (__u16 __user *)(buffer + ret);
 591                         int n = ndst>>1;
 592                         if (!access_ok(VERIFY_WRITE,dst,ndst)) {
 593                                 if (0 == ret)
 594                                         ret = -EFAULT;
 595                                 break;
 596                         }
 597                         for (; n; n--, src += (1 << bta->sampleshift), dst++)
 598                                 __put_user(*src, dst);
 599                 }
 600
 601                 ret     += ndst;
 602                 swcount -= ndst;
 603                 hwcount -= nsrc;
 604                 bta->read_count  -= nsrc;
 605                 bta->read_offset += nsrc;
 606                 if (bta->read_offset == bta->buf_size)
 607                         bta->read_offset = 0;
 608         }
 609         mutex_unlock(&bta->lock);
 610         remove_wait_queue(&bta->readq, &wait);
 611         current->state = TASK_RUNNING;
 612         return ret;
 613 }
 614
 615 static ssize_t btaudio_dsp_write(struct file *file, const char __user *buffer,
 616                                  size_t count, loff_t *ppos)
 617 {
 618         return -EINVAL;
 619 }
 620
 621 static int btaudio_dsp_ioctl(struct inode *inode, struct file *file,
 622                              unsigned int cmd, unsigned long arg)
 623 {
 624         struct btaudio *bta = file->private_data;
 625         int s, i, ret, val = 0;
 626         void __user *argp = (void __user *)arg;
 627         int __user *p = argp;
 628
 629         switch (cmd) {
 630         case OSS_GETVERSION:
 631                 return put_user(SOUND_VERSION, p);
 632         case SNDCTL_DSP_GETCAPS:
 633                 return 0;
 634
 635         case SNDCTL_DSP_SPEED:
 636                 if (get_user(val, p))
 637                         return -EFAULT;
 638                 if (bta->analog) {
 639                         for (s = 0; s < 16; s++)
 640                                 if (val << s >= HWBASE_AD*4/15)
 641                                         break;
 642                         for (i = 15; i >= 5; i--)
 643                                 if (val << s <= HWBASE_AD*4/i)
 644                                         break;
 645                         bta->sampleshift = s;
 646                         bta->decimation  = i;
 647                         if (debug)
 648                                 printk(KERN_DEBUG "btaudio: rate: req=%d  "
 649                                        "dec=%d shift=%d hwrate=%d swrate=%d\n",
 650                                        val,i,s,(HWBASE_AD*4/i),(HWBASE_AD*4/i)>>s);
 651                 } else {
 652                         bta->sampleshift = (bta->channels == 2) ? 0 : 1;
 653                         bta->decimation  = 0;
 654                 }
 655                 if (bta->recording) {
 656                         mutex_lock(&bta->lock);
 657                         stop_recording(bta);
 658                         start_recording(bta);
 659                         mutex_unlock(&bta->lock);
 660                 }
 661                 /* fall through */
 662         case SOUND_PCM_READ_RATE:
 663                 if (bta->analog) {
 664                         return put_user(HWBASE_AD*4/bta->decimation>>bta->sampleshift, p);
 665                 } else {
 666                         return put_user(bta->rate, p);
 667                 }
 668
 669         case SNDCTL_DSP_STEREO:
 670                 if (!bta->analog) {
 671                         if (get_user(val, p))
 672                                 return -EFAULT;
 673                         bta->channels    = (val > 0) ? 2 : 1;
 674                         bta->sampleshift = (bta->channels == 2) ? 0 : 1;
 675                         if (debug)
 676                                 printk(KERN_INFO
 677                                        "btaudio: stereo=%d channels=%d\n",
 678                                        val,bta->channels);
 679                 } else {
 680                         if (val == 1)
 681                                 return -EFAULT;
 682                         else {
 683                                 bta->channels = 1;
 684                                 if (debug)
 685                                         printk(KERN_INFO
 686                                                "btaudio: stereo=0 channels=1\n");
 687                         }
 688                 }
 689                 return put_user((bta->channels)-1, p);
 690
 691         case SNDCTL_DSP_CHANNELS:
 692                 if (!bta->analog) {
 693                         if (get_user(val, p))
 694                                 return -EFAULT;
 695                         bta->channels    = (val > 1) ? 2 : 1;
 696                         bta->sampleshift = (bta->channels == 2) ? 0 : 1;
 697                         if (debug)
 698                                 printk(KERN_DEBUG
 699                                        "btaudio: val=%d channels=%d\n",
 700                                        val,bta->channels);
 701                 }
 702                 /* fall through */
 703         case SOUND_PCM_READ_CHANNELS:
 704                 return put_user(bta->channels, p);
 705
 706         case SNDCTL_DSP_GETFMTS: /* Returns a mask */
 707                 if (bta->analog)
 708                         return put_user(AFMT_S16_LE|AFMT_S8, p);
 709                 else
 710                         return put_user(AFMT_S16_LE, p);
 711
 712         case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
 713                 if (get_user(val, p))
 714                         return -EFAULT;
 715                 if (val != AFMT_QUERY) {
 716                         if (bta->analog)
 717                                 bta->bits = (val == AFMT_S8) ? 8 : 16;
 718                         else
 719                                 bta->bits = 16;
 720                         if (bta->recording) {
 721                                 mutex_lock(&bta->lock);
 722                                 stop_recording(bta);
 723                                 start_recording(bta);
 724                                 mutex_unlock(&bta->lock);
 725                         }
 726                 }
 727                 if (debug)
 728                         printk(KERN_DEBUG "btaudio: fmt: bits=%d\n",bta->bits);
 729                 return put_user((bta->bits==16) ? AFMT_S16_LE : AFMT_S8,
 730                                 p);
 731                 break;
 732         case SOUND_PCM_READ_BITS:
 733                 return put_user(bta->bits, p);
 734
 735         case SNDCTL_DSP_NONBLOCK:
 736                 file->f_flags |= O_NONBLOCK;
 737                 return 0;
 738
 739         case SNDCTL_DSP_RESET:
 740                 if (bta->recording) {
 741                         mutex_lock(&bta->lock);
 742                         stop_recording(bta);
 743                         mutex_unlock(&bta->lock);
 744                 }
 745                 return 0;
 746         case SNDCTL_DSP_GETBLKSIZE:
 747                 if (!bta->recording) {
 748                         if (0 != (ret = alloc_buffer(bta)))
 749                                 return ret;
 750                         if (0 != (ret = make_risc(bta)))
 751                                 return ret;
 752                 }
 753                 return put_user(bta->block_bytes>>bta->sampleshift,p);
 754
 755         case SNDCTL_DSP_SYNC:
 756                 /* NOP */
 757                 return 0;
 758         case SNDCTL_DSP_GETISPACE:
 759         {
 760                 audio_buf_info info;
 761                 if (!bta->recording)
 762                         return -EINVAL;
 763                 info.fragsize = bta->block_bytes>>bta->sampleshift;
 764                 info.fragstotal = bta->block_count;
 765                 info.bytes = bta->read_count;
 766                 info.fragments = info.bytes / info.fragsize;
 767                 if (debug)
 768                         printk(KERN_DEBUG "btaudio: SNDCTL_DSP_GETISPACE "
 769                                "returns %d/%d/%d/%d\n",
 770                                info.fragsize, info.fragstotal,
 771                                info.bytes, info.fragments);
 772                 if (copy_to_user(argp, &info, sizeof(info)))
 773                         return -EFAULT;
 774                 return 0;
 775         }
 776 #if 0 /* TODO */
 777         case SNDCTL_DSP_GETTRIGGER:
 778         case SNDCTL_DSP_SETTRIGGER:
 779         case SNDCTL_DSP_SETFRAGMENT:
 780 #endif
 781         default:
 782                 return -EINVAL;
 783         }
 784 }
 785
 786 static unsigned int btaudio_dsp_poll(struct file *file, struct poll_table_struct *wait)
 787 {
 788         struct btaudio *bta = file->private_data;
 789         unsigned int mask = 0;
 790
 791         poll_wait(file, &bta->readq, wait);
 792
 793         if (0 != bta->read_count)
 794                 mask |= (POLLIN | POLLRDNORM);
 795
 796         return mask;
 797 }
 798
 799 static struct file_operations btaudio_digital_dsp_fops = {
 800         .owner          = THIS_MODULE,
 801         .llseek         = no_llseek,
 802         .open           = btaudio_dsp_open_digital,
 803         .release        = btaudio_dsp_release,
 804         .read           = btaudio_dsp_read,
 805         .write          = btaudio_dsp_write,
 806         .ioctl          = btaudio_dsp_ioctl,
 807         .poll           = btaudio_dsp_poll,
 808 };
 809
 810 static struct file_operations btaudio_analog_dsp_fops = {
 811         .owner          = THIS_MODULE,
 812         .llseek         = no_llseek,
 813         .open           = btaudio_dsp_open_analog,
 814         .release        = btaudio_dsp_release,
 815         .read           = btaudio_dsp_read,
 816         .write          = btaudio_dsp_write,
 817         .ioctl          = btaudio_dsp_ioctl,
 818         .poll           = btaudio_dsp_poll,
 819 };
 820
 821 /* -------------------------------------------------------------- */
 822
 823 static char *irq_name[] = { "", "", "", "OFLOW", "", "", "", "", "", "", "",
 824                             "RISCI", "FBUS", "FTRGT", "FDSR", "PPERR",
 825                             "RIPERR", "PABORT", "OCERR", "SCERR" };
 826
 827 static irqreturn_t btaudio_irq(int irq, void *dev_id, struct pt_regs * regs)
 828 {
 829         int count = 0;
 830         u32 stat,astat;
 831         struct btaudio *bta = dev_id;
 832         int handled = 0;
 833
 834         for (;;) {
 835                 count++;
 836                 stat  = btread(REG_INT_STAT);
 837                 astat = stat & btread(REG_INT_MASK);
 838                 if (!astat)
 839                         return IRQ_RETVAL(handled);
 840                 handled = 1;
 841                 btwrite(astat,REG_INT_STAT);
 842
 843                 if (irq_debug) {
 844                         int i;
 845                         printk(KERN_DEBUG "btaudio: irq loop=%d risc=%x, bits:",
 846                                count, stat>>28);
 847                         for (i = 0; i < (sizeof(irq_name)/sizeof(char*)); i++) {
 848                                 if (stat & (1 << i))
 849                                         printk(" %s",irq_name[i]);
 850                                 if (astat & (1 << i))
 851                                         printk("*");
 852                         }
 853                         printk("\n");
 854                 }
 855                 if (stat & IRQ_RISCI) {
 856                         int blocks;
 857                         blocks = (stat >> 28) - bta->dma_block;
 858                         if (blocks < 0)
 859                                 blocks += bta->block_count;
 860                         bta->dma_block = stat >> 28;
 861                         if (bta->read_count + 2*bta->block_bytes > bta->buf_size) {
 862                                 stop_recording(bta);
 863                                 printk(KERN_INFO "btaudio: buffer overrun\n");
 864                         }
 865                         if (blocks > 0) {
 866                                 bta->read_count += blocks * bta->block_bytes;
 867                                 wake_up_interruptible(&bta->readq);
 868                         }
 869                 }
 870                 if (count > 10) {
 871                         printk(KERN_WARNING
 872                                "btaudio: Oops - irq mask cleared\n");
 873                         btwrite(0, REG_INT_MASK);
 874                 }
 875         }
 876         return IRQ_NONE;
 877 }
 878
 879 /* -------------------------------------------------------------- */
 880
 881 static unsigned int dsp1 = -1;
 882 static unsigned int dsp2 = -1;
 883 static unsigned int mixer = -1;
 884 static int latency = -1;
 885 static int digital = 1;
 886 static int analog = 1;
 887 static int rate;
 888
 889 #define BTA_OSPREY200 1
 890
 891 static struct cardinfo cards[] = {
 892         [0] = {
 893                 .name   = "default",
 894                 .rate   = 32000,
 895         },
 896         [BTA_OSPREY200] = {
 897                 .name   = "Osprey 200",
 898                 .rate   = 44100,
 899         },
 900 };
 901
 902 static int __devinit btaudio_probe(struct pci_dev *pci_dev,
 903                                    const struct pci_device_id *pci_id)
 904 {
 905         struct btaudio *bta;
 906         struct cardinfo *card = &cards[pci_id->driver_data];
 907         unsigned char revision,lat;
 908         int rc = -EBUSY;
 909
 910         if (pci_enable_device(pci_dev))
 911                 return -EIO;
 912         if (!request_mem_region(pci_resource_start(pci_dev,0),
 913                                 pci_resource_len(pci_dev,0),
 914                                 "btaudio")) {
 915                 return -EBUSY;
 916         }
 917
 918         bta = kmalloc(sizeof(*bta),GFP_ATOMIC);
 919         if (!bta) {
 920                 rc = -ENOMEM;
 921                 goto fail0;
 922         }
 923         memset(bta,0,sizeof(*bta));
 924
 925         bta->pci  = pci_dev;
 926         bta->irq  = pci_dev->irq;
 927         bta->mem  = pci_resource_start(pci_dev,0);
 928         bta->mmio = ioremap(pci_resource_start(pci_dev,0),
 929                             pci_resource_len(pci_dev,0));
 930
 931         bta->source     = 1;
 932         bta->bits       = 8;
 933         bta->channels   = 1;
 934         if (bta->analog) {
 935                 bta->decimation  = 15;
 936         } else {
 937                 bta->decimation  = 0;
 938                 bta->sampleshift = 1;
 939         }
 940
 941         /* sample rate */
 942         bta->rate = card->rate;
 943         if (rate)
 944                 bta->rate = rate;
 945
 946         mutex_init(&bta->lock);
 947         init_waitqueue_head(&bta->readq);
 948
 949         if (-1 != latency) {
 950                 printk(KERN_INFO "btaudio: setting pci latency timer to %d\n",
 951                        latency);
 952                 pci_write_config_byte(pci_dev, PCI_LATENCY_TIMER, latency);
 953         }
 954         pci_read_config_byte(pci_dev, PCI_CLASS_REVISION, &revision);
 955         pci_read_config_byte(pci_dev, PCI_LATENCY_TIMER, &lat);
 956         printk(KERN_INFO "btaudio: Bt%x (rev %d) at %02x:%02x.%x, ",
 957                pci_dev->device,revision,pci_dev->bus->number,
 958                PCI_SLOT(pci_dev->devfn),PCI_FUNC(pci_dev->devfn));
 959         printk("irq: %d, latency: %d, mmio: 0x%lx\n",
 960                bta->irq, lat, bta->mem);
 961         printk("btaudio: using card config \"%s\"\n", card->name);
 962
 963         /* init hw */
 964         btwrite(0, REG_GPIO_DMA_CTL);
 965         btwrite(0, REG_INT_MASK);
 966         btwrite(~0U, REG_INT_STAT);
 967         pci_set_master(pci_dev);
 968
 969         if ((rc = request_irq(bta->irq, btaudio_irq, IRQF_SHARED|IRQF_DISABLED,
 970                               "btaudio",(void *)bta)) < 0) {
 971                 printk(KERN_WARNING
 972                        "btaudio: can't request irq (rc=%d)\n",rc);
 973                 goto fail1;
 974         }
 975
 976         /* register devices */
 977         if (digital) {
 978                 rc = bta->dsp_digital =
 979                         register_sound_dsp(&btaudio_digital_dsp_fops,dsp1);
 980                 if (rc < 0) {
 981                         printk(KERN_WARNING
 982                                "btaudio: can't register digital dsp (rc=%d)\n",rc);
 983                         goto fail2;
 984                 }
 985                 printk(KERN_INFO "btaudio: registered device dsp%d [digital]\n",
 986                        bta->dsp_digital >> 4);
 987         }
 988         if (analog) {
 989                 rc = bta->dsp_analog =
 990                         register_sound_dsp(&btaudio_analog_dsp_fops,dsp2);
 991                 if (rc < 0) {
 992                         printk(KERN_WARNING
 993                                "btaudio: can't register analog dsp (rc=%d)\n",rc);
 994                         goto fail3;
 995                 }
 996                 printk(KERN_INFO "btaudio: registered device dsp%d [analog]\n",
 997                        bta->dsp_analog >> 4);
 998                 rc = bta->mixer_dev = register_sound_mixer(&btaudio_mixer_fops,mixer);
 999                 if (rc < 0) {
1000                         printk(KERN_WARNING
1001                                "btaudio: can't register mixer (rc=%d)\n",rc);
1002                         goto fail4;
1003                 }
1004                 printk(KERN_INFO "btaudio: registered device mixer%d\n",
1005                        bta->mixer_dev >> 4);
1006         }
1007
1008         /* hook into linked list */
1009         bta->next = btaudios;
1010         btaudios = bta;
1011
1012         pci_set_drvdata(pci_dev,bta);
1013         return 0;
1014
1015  fail4:
1016         unregister_sound_dsp(bta->dsp_analog);
1017  fail3:
1018         if (digital)
1019                 unregister_sound_dsp(bta->dsp_digital);
1020  fail2:
1021         free_irq(bta->irq,bta);
1022  fail1:
1023         kfree(bta);
1024  fail0:
1025         release_mem_region(pci_resource_start(pci_dev,0),
1026                            pci_resource_len(pci_dev,0));
1027         return rc;
1028 }
1029
1030 static void __devexit btaudio_remove(struct pci_dev *pci_dev)
1031 {
1032         struct btaudio *bta = pci_get_drvdata(pci_dev);
1033         struct btaudio *walk;
1034
1035         /* turn off all DMA / IRQs */
1036         btand(~15, REG_GPIO_DMA_CTL);
1037         btwrite(0, REG_INT_MASK);
1038         btwrite(~0U, REG_INT_STAT);
1039
1040         /* unregister devices */
1041         if (digital) {
1042                 unregister_sound_dsp(bta->dsp_digital);
1043         }
1044         if (analog) {
1045                 unregister_sound_dsp(bta->dsp_analog);
1046                 unregister_sound_mixer(bta->mixer_dev);
1047         }
1048
1049         /* free resources */
1050         free_buffer(bta);
1051         free_irq(bta->irq,bta);
1052         release_mem_region(pci_resource_start(pci_dev,0),
1053                            pci_resource_len(pci_dev,0));
1054
1055         /* remove from linked list */
1056         if (bta == btaudios) {
1057                 btaudios = NULL;
1058         } else {
1059                 for (walk = btaudios; walk->next != bta; walk = walk->next)
1060                         ; /* if (NULL == walk->next) BUG(); */
1061                 walk->next = bta->next;
1062         }
1063
1064         pci_set_drvdata(pci_dev, NULL);
1065         kfree(bta);
1066         return;
1067 }
1068
1069 /* -------------------------------------------------------------- */
1070
1071 static struct pci_device_id btaudio_pci_tbl[] = {
1072         {
1073                 .vendor         = PCI_VENDOR_ID_BROOKTREE,
1074                 .device         = 0x0878,
1075                 .subvendor      = 0x0070,
1076                 .subdevice      = 0xff01,
1077                 .driver_data    = BTA_OSPREY200,
1078         },{
1079                 .vendor         = PCI_VENDOR_ID_BROOKTREE,
1080                 .device         = 0x0878,
1081                 .subvendor      = PCI_ANY_ID,
1082                 .subdevice      = PCI_ANY_ID,
1083         },{
1084                 .vendor         = PCI_VENDOR_ID_BROOKTREE,
1085                 .device         = 0x0878,
1086                 .subvendor      = PCI_ANY_ID,
1087                 .subdevice      = PCI_ANY_ID,
1088         },{
1089                 /* --- end of list --- */
1090         }
1091 };
1092
1093 static struct pci_driver btaudio_pci_driver = {
1094         .name           = "btaudio",
1095         .id_table       = btaudio_pci_tbl,
1096         .probe          = btaudio_probe,
1097         .remove         =  __devexit_p(btaudio_remove),
1098 };
1099
1100 static int btaudio_init_module(void)
1101 {
1102         printk(KERN_INFO "btaudio: driver version 0.7 loaded [%s%s%s]\n",
1103                digital ? "digital" : "",
1104                analog && digital ? "+" : "",
1105                analog ? "analog" : "");
1106         return pci_register_driver(&btaudio_pci_driver);
1107 }
1108
1109 static void btaudio_cleanup_module(void)
1110 {
1111         pci_unregister_driver(&btaudio_pci_driver);
1112         return;
1113 }
1114
1115 module_init(btaudio_init_module);
1116 module_exit(btaudio_cleanup_module);
1117
1118 module_param(dsp1, int, S_IRUGO);
1119 module_param(dsp2, int, S_IRUGO);
1120 module_param(mixer, int, S_IRUGO);
1121 module_param(debug, int, S_IRUGO | S_IWUSR);
1122 module_param(irq_debug, int, S_IRUGO | S_IWUSR);
1123 module_param(digital, int, S_IRUGO);
1124 module_param(analog, int, S_IRUGO);
1125 module_param(rate, int, S_IRUGO);
1126 module_param(latency, int, S_IRUGO);
1127 MODULE_PARM_DESC(latency,"pci latency timer");
1128
1129 MODULE_DEVICE_TABLE(pci, btaudio_pci_tbl);
1130 MODULE_DESCRIPTION("bt878 audio dma driver");
1131 MODULE_AUTHOR("Gerd Knorr");
1132 MODULE_LICENSE("GPL");
1133
1134 /*
1135  * Local variables:
1136  * c-basic-offset: 8
1137  * End:
1138  */