git.oblomov.eu Git - linux-2.6/blob - drivers/media/video/dabusb.c

   1 /*****************************************************************************/
   2
   3 /*
   4  *      dabusb.c  --  dab usb driver.
   5  *
   6  *      Copyright (C) 1999  Deti Fliegl (deti@fliegl.de)
   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., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  *
  23  *
  24  *  $Id: dabusb.c,v 1.54 2000/07/24 21:39:39 deti Exp $
  25  *
  26  */
  27
  28 /*****************************************************************************/
  29
  30 #include <linux/module.h>
  31 #include <linux/socket.h>
  32 #include <linux/list.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/slab.h>
  35 #include <linux/init.h>
  36 #include <asm/uaccess.h>
  37 #include <asm/atomic.h>
  38 #include <linux/delay.h>
  39 #include <linux/usb.h>
  40 #include <linux/smp_lock.h>
  41 #include <linux/mutex.h>
  42
  43 #include "dabusb.h"
  44 #include "dabfirmware.h"
  45
  46 /*
  47  * Version Information
  48  */
  49 #define DRIVER_VERSION "v1.54"
  50 #define DRIVER_AUTHOR "Deti Fliegl, deti@fliegl.de"
  51 #define DRIVER_DESC "DAB-USB Interface Driver for Linux (c)1999"
  52
  53 /* --------------------------------------------------------------------- */
  54
  55 #ifdef CONFIG_USB_DYNAMIC_MINORS
  56 #define NRDABUSB 256
  57 #else
  58 #define NRDABUSB 4
  59 #endif
  60
  61 /*-------------------------------------------------------------------*/
  62
  63 static dabusb_t dabusb[NRDABUSB];
  64 static int buffers = 256;
  65 static struct usb_driver dabusb_driver;
  66
  67 /*-------------------------------------------------------------------*/
  68
  69 static int dabusb_add_buf_tail (pdabusb_t s, struct list_head *dst, struct list_head *src)
  70 {
  71         unsigned long flags;
  72         struct list_head *tmp;
  73         int ret = 0;
  74
  75         spin_lock_irqsave (&s->lock, flags);
  76
  77         if (list_empty (src)) {
  78                 // no elements in source buffer
  79                 ret = -1;
  80                 goto err;
  81         }
  82         tmp = src->next;
  83         list_move_tail (tmp, dst);
  84
  85   err:  spin_unlock_irqrestore (&s->lock, flags);
  86         return ret;
  87 }
  88 /*-------------------------------------------------------------------*/
  89 #ifdef DEBUG
  90 static void dump_urb (struct urb *urb)
  91 {
  92         dbg("urb                   :%p", urb);
  93         dbg("dev                   :%p", urb->dev);
  94         dbg("pipe                  :%08X", urb->pipe);
  95         dbg("status                :%d", urb->status);
  96         dbg("transfer_flags        :%08X", urb->transfer_flags);
  97         dbg("transfer_buffer       :%p", urb->transfer_buffer);
  98         dbg("transfer_buffer_length:%d", urb->transfer_buffer_length);
  99         dbg("actual_length         :%d", urb->actual_length);
 100         dbg("setup_packet          :%p", urb->setup_packet);
 101         dbg("start_frame           :%d", urb->start_frame);
 102         dbg("number_of_packets     :%d", urb->number_of_packets);
 103         dbg("interval              :%d", urb->interval);
 104         dbg("error_count           :%d", urb->error_count);
 105         dbg("context               :%p", urb->context);
 106         dbg("complete              :%p", urb->complete);
 107 }
 108 #endif
 109 /*-------------------------------------------------------------------*/
 110 static int dabusb_cancel_queue (pdabusb_t s, struct list_head *q)
 111 {
 112         unsigned long flags;
 113         pbuff_t b;
 114
 115         dbg("dabusb_cancel_queue");
 116
 117         spin_lock_irqsave (&s->lock, flags);
 118
 119         list_for_each_entry(b, q, buff_list) {
 120 #ifdef DEBUG
 121                 dump_urb(b->purb);
 122 #endif
 123                 usb_unlink_urb (b->purb);
 124         }
 125         spin_unlock_irqrestore (&s->lock, flags);
 126         return 0;
 127 }
 128 /*-------------------------------------------------------------------*/
 129 static int dabusb_free_queue (struct list_head *q)
 130 {
 131         struct list_head *tmp;
 132         struct list_head *p;
 133         pbuff_t b;
 134
 135         dbg("dabusb_free_queue");
 136         for (p = q->next; p != q;) {
 137                 b = list_entry (p, buff_t, buff_list);
 138
 139 #ifdef DEBUG
 140                 dump_urb(b->purb);
 141 #endif
 142                 kfree(b->purb->transfer_buffer);
 143                 usb_free_urb(b->purb);
 144                 tmp = p->next;
 145                 list_del (p);
 146                 kfree (b);
 147                 p = tmp;
 148         }
 149
 150         return 0;
 151 }
 152 /*-------------------------------------------------------------------*/
 153 static int dabusb_free_buffers (pdabusb_t s)
 154 {
 155         unsigned long flags;
 156         dbg("dabusb_free_buffers");
 157
 158         spin_lock_irqsave(&s->lock, flags);
 159
 160         dabusb_free_queue (&s->free_buff_list);
 161         dabusb_free_queue (&s->rec_buff_list);
 162
 163         spin_unlock_irqrestore(&s->lock, flags);
 164
 165         s->got_mem = 0;
 166         return 0;
 167 }
 168 /*-------------------------------------------------------------------*/
 169 static void dabusb_iso_complete (struct urb *purb)
 170 {
 171         pbuff_t b = purb->context;
 172         pdabusb_t s = b->s;
 173         int i;
 174         int len;
 175         int dst = 0;
 176         void *buf = purb->transfer_buffer;
 177
 178         dbg("dabusb_iso_complete");
 179
 180         // process if URB was not killed
 181         if (purb->status != -ENOENT) {
 182                 unsigned int pipe = usb_rcvisocpipe (purb->dev, _DABUSB_ISOPIPE);
 183                 int pipesize = usb_maxpacket (purb->dev, pipe, usb_pipeout (pipe));
 184                 for (i = 0; i < purb->number_of_packets; i++)
 185                         if (!purb->iso_frame_desc[i].status) {
 186                                 len = purb->iso_frame_desc[i].actual_length;
 187                                 if (len <= pipesize) {
 188                                         memcpy (buf + dst, buf + purb->iso_frame_desc[i].offset, len);
 189                                         dst += len;
 190                                 }
 191                                 else
 192                                         err("dabusb_iso_complete: invalid len %d", len);
 193                         }
 194                         else
 195                                 warn("dabusb_iso_complete: corrupted packet status: %d", purb->iso_frame_desc[i].status);
 196                 if (dst != purb->actual_length)
 197                         err("dst!=purb->actual_length:%d!=%d", dst, purb->actual_length);
 198         }
 199
 200         if (atomic_dec_and_test (&s->pending_io) && !s->remove_pending && s->state != _stopped) {
 201                 s->overruns++;
 202                 err("overrun (%d)", s->overruns);
 203         }
 204         wake_up (&s->wait);
 205 }
 206 /*-------------------------------------------------------------------*/
 207 static int dabusb_alloc_buffers (pdabusb_t s)
 208 {
 209         int buffers = 0;
 210         pbuff_t b;
 211         unsigned int pipe = usb_rcvisocpipe (s->usbdev, _DABUSB_ISOPIPE);
 212         int pipesize = usb_maxpacket (s->usbdev, pipe, usb_pipeout (pipe));
 213         int packets = _ISOPIPESIZE / pipesize;
 214         int transfer_buffer_length = packets * pipesize;
 215         int i;
 216
 217         dbg("dabusb_alloc_buffers pipesize:%d packets:%d transfer_buffer_len:%d",
 218                  pipesize, packets, transfer_buffer_length);
 219
 220         while (buffers < (s->total_buffer_size << 10)) {
 221                 b = kzalloc(sizeof (buff_t), GFP_KERNEL);
 222                 if (!b) {
 223                         err("kzalloc(sizeof(buff_t))==NULL");
 224                         goto err;
 225                 }
 226                 b->s = s;
 227                 b->purb = usb_alloc_urb(packets, GFP_KERNEL);
 228                 if (!b->purb) {
 229                         err("usb_alloc_urb == NULL");
 230                         kfree (b);
 231                         goto err;
 232                 }
 233
 234                 b->purb->transfer_buffer = kmalloc (transfer_buffer_length, GFP_KERNEL);
 235                 if (!b->purb->transfer_buffer) {
 236                         kfree (b->purb);
 237                         kfree (b);
 238                         err("kmalloc(%d)==NULL", transfer_buffer_length);
 239                         goto err;
 240                 }
 241
 242                 b->purb->transfer_buffer_length = transfer_buffer_length;
 243                 b->purb->number_of_packets = packets;
 244                 b->purb->complete = dabusb_iso_complete;
 245                 b->purb->context = b;
 246                 b->purb->dev = s->usbdev;
 247                 b->purb->pipe = pipe;
 248                 b->purb->transfer_flags = URB_ISO_ASAP;
 249
 250                 for (i = 0; i < packets; i++) {
 251                         b->purb->iso_frame_desc[i].offset = i * pipesize;
 252                         b->purb->iso_frame_desc[i].length = pipesize;
 253                 }
 254
 255                 buffers += transfer_buffer_length;
 256                 list_add_tail (&b->buff_list, &s->free_buff_list);
 257         }
 258         s->got_mem = buffers;
 259
 260         return 0;
 261
 262         err:
 263         dabusb_free_buffers (s);
 264         return -ENOMEM;
 265 }
 266 /*-------------------------------------------------------------------*/
 267 static int dabusb_bulk (pdabusb_t s, pbulk_transfer_t pb)
 268 {
 269         int ret;
 270         unsigned int pipe;
 271         int actual_length;
 272
 273         dbg("dabusb_bulk");
 274
 275         if (!pb->pipe)
 276                 pipe = usb_rcvbulkpipe (s->usbdev, 2);
 277         else
 278                 pipe = usb_sndbulkpipe (s->usbdev, 2);
 279
 280         ret=usb_bulk_msg(s->usbdev, pipe, pb->data, pb->size, &actual_length, 100);
 281         if(ret<0) {
 282                 err("dabusb: usb_bulk_msg failed(%d)",ret);
 283
 284                 if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) {
 285                         err("set_interface failed");
 286                         return -EINVAL;
 287                 }
 288
 289         }
 290
 291         if( ret == -EPIPE ) {
 292                 warn("CLEAR_FEATURE request to remove STALL condition.");
 293                 if(usb_clear_halt(s->usbdev, usb_pipeendpoint(pipe)))
 294                         err("request failed");
 295         }
 296
 297         pb->size = actual_length;
 298         return ret;
 299 }
 300 /* --------------------------------------------------------------------- */
 301 static int dabusb_writemem (pdabusb_t s, int pos, unsigned char *data, int len)
 302 {
 303         int ret;
 304         unsigned char *transfer_buffer =  kmalloc (len, GFP_KERNEL);
 305
 306         if (!transfer_buffer) {
 307                 err("dabusb_writemem: kmalloc(%d) failed.", len);
 308                 return -ENOMEM;
 309         }
 310
 311         memcpy (transfer_buffer, data, len);
 312
 313         ret=usb_control_msg(s->usbdev, usb_sndctrlpipe( s->usbdev, 0 ), 0xa0, 0x40, pos, 0, transfer_buffer, len, 300);
 314
 315         kfree (transfer_buffer);
 316         return ret;
 317 }
 318 /* --------------------------------------------------------------------- */
 319 static int dabusb_8051_reset (pdabusb_t s, unsigned char reset_bit)
 320 {
 321         dbg("dabusb_8051_reset: %d",reset_bit);
 322         return dabusb_writemem (s, CPUCS_REG, &reset_bit, 1);
 323 }
 324 /* --------------------------------------------------------------------- */
 325 static int dabusb_loadmem (pdabusb_t s, const char *fname)
 326 {
 327         int ret;
 328         PINTEL_HEX_RECORD ptr = firmware;
 329
 330         dbg("Enter dabusb_loadmem (internal)");
 331
 332         ret = dabusb_8051_reset (s, 1);
 333         while (ptr->Type == 0) {
 334
 335                 dbg("dabusb_writemem: %04X %p %d)", ptr->Address, ptr->Data, ptr->Length);
 336
 337                 ret = dabusb_writemem (s, ptr->Address, ptr->Data, ptr->Length);
 338                 if (ret < 0) {
 339                         err("dabusb_writemem failed (%d %04X %p %d)", ret, ptr->Address, ptr->Data, ptr->Length);
 340                         break;
 341                 }
 342                 ptr++;
 343         }
 344         ret = dabusb_8051_reset (s, 0);
 345
 346         dbg("dabusb_loadmem: exit");
 347
 348         return ret;
 349 }
 350 /* --------------------------------------------------------------------- */
 351 static int dabusb_fpga_clear (pdabusb_t s, pbulk_transfer_t b)
 352 {
 353         b->size = 4;
 354         b->data[0] = 0x2a;
 355         b->data[1] = 0;
 356         b->data[2] = 0;
 357         b->data[3] = 0;
 358
 359         dbg("dabusb_fpga_clear");
 360
 361         return dabusb_bulk (s, b);
 362 }
 363 /* --------------------------------------------------------------------- */
 364 static int dabusb_fpga_init (pdabusb_t s, pbulk_transfer_t b)
 365 {
 366         b->size = 4;
 367         b->data[0] = 0x2c;
 368         b->data[1] = 0;
 369         b->data[2] = 0;
 370         b->data[3] = 0;
 371
 372         dbg("dabusb_fpga_init");
 373
 374         return dabusb_bulk (s, b);
 375 }
 376 /* --------------------------------------------------------------------- */
 377 static int dabusb_fpga_download (pdabusb_t s, const char *fname)
 378 {
 379         pbulk_transfer_t b = kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL);
 380         unsigned int blen, n;
 381         int ret;
 382         unsigned char *buf = bitstream;
 383
 384         dbg("Enter dabusb_fpga_download (internal)");
 385
 386         if (!b) {
 387                 err("kmalloc(sizeof(bulk_transfer_t))==NULL");
 388                 return -ENOMEM;
 389         }
 390
 391         b->pipe = 1;
 392         ret = dabusb_fpga_clear (s, b);
 393         mdelay (10);
 394         blen = buf[73] + (buf[72] << 8);
 395
 396         dbg("Bitstream len: %i", blen);
 397
 398         b->data[0] = 0x2b;
 399         b->data[1] = 0;
 400         b->data[2] = 0;
 401         b->data[3] = 60;
 402
 403         for (n = 0; n <= blen + 60; n += 60) {
 404                 // some cclks for startup
 405                 b->size = 64;
 406                 memcpy (b->data + 4, buf + 74 + n, 60);
 407                 ret = dabusb_bulk (s, b);
 408                 if (ret < 0) {
 409                         err("dabusb_bulk failed.");
 410                         break;
 411                 }
 412                 mdelay (1);
 413         }
 414
 415         ret = dabusb_fpga_init (s, b);
 416         kfree (b);
 417
 418         dbg("exit dabusb_fpga_download");
 419
 420         return ret;
 421 }
 422
 423 static int dabusb_stop (pdabusb_t s)
 424 {
 425         dbg("dabusb_stop");
 426
 427         s->state = _stopped;
 428         dabusb_cancel_queue (s, &s->rec_buff_list);
 429
 430         dbg("pending_io: %d", s->pending_io.counter);
 431
 432         s->pending_io.counter = 0;
 433         return 0;
 434 }
 435
 436 static int dabusb_startrek (pdabusb_t s)
 437 {
 438         if (!s->got_mem && s->state != _started) {
 439
 440                 dbg("dabusb_startrek");
 441
 442                 if (dabusb_alloc_buffers (s) < 0)
 443                         return -ENOMEM;
 444                 dabusb_stop (s);
 445                 s->state = _started;
 446                 s->readptr = 0;
 447         }
 448
 449         if (!list_empty (&s->free_buff_list)) {
 450                 pbuff_t end;
 451                 int ret;
 452
 453         while (!dabusb_add_buf_tail (s, &s->rec_buff_list, &s->free_buff_list)) {
 454
 455                         dbg("submitting: end:%p s->rec_buff_list:%p", s->rec_buff_list.prev, &s->rec_buff_list);
 456
 457                         end = list_entry (s->rec_buff_list.prev, buff_t, buff_list);
 458
 459                         ret = usb_submit_urb (end->purb, GFP_KERNEL);
 460                         if (ret) {
 461                                 err("usb_submit_urb returned:%d", ret);
 462                                 if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list))
 463                                         err("startrek: dabusb_add_buf_tail failed");
 464                                 break;
 465                         }
 466                         else
 467                                 atomic_inc (&s->pending_io);
 468                 }
 469                 dbg("pending_io: %d",s->pending_io.counter);
 470         }
 471
 472         return 0;
 473 }
 474
 475 static ssize_t dabusb_read (struct file *file, char __user *buf, size_t count, loff_t * ppos)
 476 {
 477         pdabusb_t s = (pdabusb_t) file->private_data;
 478         unsigned long flags;
 479         unsigned ret = 0;
 480         int rem;
 481         int cnt;
 482         pbuff_t b;
 483         struct urb *purb = NULL;
 484
 485         dbg("dabusb_read");
 486
 487         if (*ppos)
 488                 return -ESPIPE;
 489
 490         if (s->remove_pending)
 491                 return -EIO;
 492
 493
 494         if (!s->usbdev)
 495                 return -EIO;
 496
 497         while (count > 0) {
 498                 dabusb_startrek (s);
 499
 500                 spin_lock_irqsave (&s->lock, flags);
 501
 502                 if (list_empty (&s->rec_buff_list)) {
 503
 504                         spin_unlock_irqrestore(&s->lock, flags);
 505
 506                         err("error: rec_buf_list is empty");
 507                         goto err;
 508                 }
 509
 510                 b = list_entry (s->rec_buff_list.next, buff_t, buff_list);
 511                 purb = b->purb;
 512
 513                 spin_unlock_irqrestore(&s->lock, flags);
 514
 515                 if (purb->status == -EINPROGRESS) {
 516                         if (file->f_flags & O_NONBLOCK)         // return nonblocking
 517                          {
 518                                 if (!ret)
 519                                         ret = -EAGAIN;
 520                                 goto err;
 521                         }
 522
 523                         interruptible_sleep_on (&s->wait);
 524
 525                         if (signal_pending (current)) {
 526                                 if (!ret)
 527                                         ret = -ERESTARTSYS;
 528                                 goto err;
 529                         }
 530
 531                         spin_lock_irqsave (&s->lock, flags);
 532
 533                         if (list_empty (&s->rec_buff_list)) {
 534                                 spin_unlock_irqrestore(&s->lock, flags);
 535                                 err("error: still no buffer available.");
 536                                 goto err;
 537                         }
 538                         spin_unlock_irqrestore(&s->lock, flags);
 539                         s->readptr = 0;
 540                 }
 541                 if (s->remove_pending) {
 542                         ret = -EIO;
 543                         goto err;
 544                 }
 545
 546                 rem = purb->actual_length - s->readptr;         // set remaining bytes to copy
 547
 548                 if (count >= rem)
 549                         cnt = rem;
 550                 else
 551                         cnt = count;
 552
 553                 dbg("copy_to_user:%p %p %d",buf, purb->transfer_buffer + s->readptr, cnt);
 554
 555                 if (copy_to_user (buf, purb->transfer_buffer + s->readptr, cnt)) {
 556                         err("read: copy_to_user failed");
 557                         if (!ret)
 558                                 ret = -EFAULT;
 559                         goto err;
 560                 }
 561
 562                 s->readptr += cnt;
 563                 count -= cnt;
 564                 buf += cnt;
 565                 ret += cnt;
 566
 567                 if (s->readptr == purb->actual_length) {
 568                         // finished, take next buffer
 569                         if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list))
 570                                 err("read: dabusb_add_buf_tail failed");
 571                         s->readptr = 0;
 572                 }
 573         }
 574       err:                      //mutex_unlock(&s->mutex);
 575         return ret;
 576 }
 577
 578 static int dabusb_open (struct inode *inode, struct file *file)
 579 {
 580         int devnum = iminor(inode);
 581         pdabusb_t s;
 582
 583         if (devnum < DABUSB_MINOR || devnum >= (DABUSB_MINOR + NRDABUSB))
 584                 return -EIO;
 585
 586         s = &dabusb[devnum - DABUSB_MINOR];
 587
 588         dbg("dabusb_open");
 589         mutex_lock(&s->mutex);
 590
 591         while (!s->usbdev || s->opened) {
 592                 mutex_unlock(&s->mutex);
 593
 594                 if (file->f_flags & O_NONBLOCK) {
 595                         return -EBUSY;
 596                 }
 597                 msleep_interruptible(500);
 598
 599                 if (signal_pending (current)) {
 600                         return -EAGAIN;
 601                 }
 602                 mutex_lock(&s->mutex);
 603         }
 604         if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) {
 605                 mutex_unlock(&s->mutex);
 606                 err("set_interface failed");
 607                 return -EINVAL;
 608         }
 609         s->opened = 1;
 610         mutex_unlock(&s->mutex);
 611
 612         file->f_pos = 0;
 613         file->private_data = s;
 614
 615         return nonseekable_open(inode, file);
 616 }
 617
 618 static int dabusb_release (struct inode *inode, struct file *file)
 619 {
 620         pdabusb_t s = (pdabusb_t) file->private_data;
 621
 622         dbg("dabusb_release");
 623
 624         mutex_lock(&s->mutex);
 625         dabusb_stop (s);
 626         dabusb_free_buffers (s);
 627         mutex_unlock(&s->mutex);
 628
 629         if (!s->remove_pending) {
 630                 if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0)
 631                         err("set_interface failed");
 632         }
 633         else
 634                 wake_up (&s->remove_ok);
 635
 636         s->opened = 0;
 637         return 0;
 638 }
 639
 640 static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 641 {
 642         pdabusb_t s = (pdabusb_t) file->private_data;
 643         pbulk_transfer_t pbulk;
 644         int ret = 0;
 645         int version = DABUSB_VERSION;
 646
 647         dbg("dabusb_ioctl");
 648
 649         if (s->remove_pending)
 650                 return -EIO;
 651
 652         mutex_lock(&s->mutex);
 653
 654         if (!s->usbdev) {
 655                 mutex_unlock(&s->mutex);
 656                 return -EIO;
 657         }
 658
 659         switch (cmd) {
 660
 661         case IOCTL_DAB_BULK:
 662                 pbulk = kmalloc(sizeof (bulk_transfer_t), GFP_KERNEL);
 663
 664                 if (!pbulk) {
 665                         ret = -ENOMEM;
 666                         break;
 667                 }
 668
 669                 if (copy_from_user (pbulk, (void __user *) arg, sizeof (bulk_transfer_t))) {
 670                         ret = -EFAULT;
 671                         kfree (pbulk);
 672                         break;
 673                 }
 674
 675                 ret=dabusb_bulk (s, pbulk);
 676                 if(ret==0)
 677                         if (copy_to_user((void __user *)arg, pbulk,
 678                                          sizeof(bulk_transfer_t)))
 679                                 ret = -EFAULT;
 680                 kfree (pbulk);
 681                 break;
 682
 683         case IOCTL_DAB_OVERRUNS:
 684                 ret = put_user (s->overruns, (unsigned int __user *) arg);
 685                 break;
 686
 687         case IOCTL_DAB_VERSION:
 688                 ret = put_user (version, (unsigned int __user *) arg);
 689                 break;
 690
 691         default:
 692                 ret = -ENOIOCTLCMD;
 693                 break;
 694         }
 695         mutex_unlock(&s->mutex);
 696         return ret;
 697 }
 698
 699 static const struct file_operations dabusb_fops =
 700 {
 701         .owner =        THIS_MODULE,
 702         .llseek =       no_llseek,
 703         .read =         dabusb_read,
 704         .ioctl =        dabusb_ioctl,
 705         .open =         dabusb_open,
 706         .release =      dabusb_release,
 707 };
 708
 709 static struct usb_class_driver dabusb_class = {
 710         .name =         "dabusb%d",
 711         .fops =         &dabusb_fops,
 712         .minor_base =   DABUSB_MINOR,
 713 };
 714
 715
 716 /* --------------------------------------------------------------------- */
 717 static int dabusb_probe (struct usb_interface *intf,
 718                          const struct usb_device_id *id)
 719 {
 720         struct usb_device *usbdev = interface_to_usbdev(intf);
 721         int retval;
 722         pdabusb_t s;
 723
 724         dbg("dabusb: probe: vendor id 0x%x, device id 0x%x ifnum:%d",
 725             le16_to_cpu(usbdev->descriptor.idVendor),
 726             le16_to_cpu(usbdev->descriptor.idProduct),
 727             intf->altsetting->desc.bInterfaceNumber);
 728
 729         /* We don't handle multiple configurations */
 730         if (usbdev->descriptor.bNumConfigurations != 1)
 731                 return -ENODEV;
 732
 733         if (intf->altsetting->desc.bInterfaceNumber != _DABUSB_IF &&
 734             le16_to_cpu(usbdev->descriptor.idProduct) == 0x9999)
 735                 return -ENODEV;
 736
 737
 738
 739         s = &dabusb[intf->minor];
 740
 741         mutex_lock(&s->mutex);
 742         s->remove_pending = 0;
 743         s->usbdev = usbdev;
 744         s->devnum = intf->minor;
 745
 746         if (usb_reset_configuration (usbdev) < 0) {
 747                 err("reset_configuration failed");
 748                 goto reject;
 749         }
 750         if (le16_to_cpu(usbdev->descriptor.idProduct) == 0x2131) {
 751                 dabusb_loadmem (s, NULL);
 752                 goto reject;
 753         }
 754         else {
 755                 dabusb_fpga_download (s, NULL);
 756
 757                 if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) {
 758                         err("set_interface failed");
 759                         goto reject;
 760                 }
 761         }
 762         dbg("bound to interface: %d", intf->altsetting->desc.bInterfaceNumber);
 763         usb_set_intfdata (intf, s);
 764         mutex_unlock(&s->mutex);
 765
 766         retval = usb_register_dev(intf, &dabusb_class);
 767         if (retval) {
 768                 usb_set_intfdata (intf, NULL);
 769                 return -ENOMEM;
 770         }
 771
 772         return 0;
 773
 774       reject:
 775         mutex_unlock(&s->mutex);
 776         s->usbdev = NULL;
 777         return -ENODEV;
 778 }
 779
 780 static void dabusb_disconnect (struct usb_interface *intf)
 781 {
 782         wait_queue_t __wait;
 783         pdabusb_t s = usb_get_intfdata (intf);
 784
 785         dbg("dabusb_disconnect");
 786
 787         init_waitqueue_entry(&__wait, current);
 788
 789         usb_set_intfdata (intf, NULL);
 790         if (s) {
 791                 usb_deregister_dev (intf, &dabusb_class);
 792                 s->remove_pending = 1;
 793                 wake_up (&s->wait);
 794                 add_wait_queue(&s->remove_ok, &__wait);
 795                 set_current_state(TASK_UNINTERRUPTIBLE);
 796                 if (s->state == _started)
 797                         schedule();
 798                 current->state = TASK_RUNNING;
 799                 remove_wait_queue(&s->remove_ok, &__wait);
 800
 801                 s->usbdev = NULL;
 802                 s->overruns = 0;
 803         }
 804 }
 805
 806 static struct usb_device_id dabusb_ids [] = {
 807         // { USB_DEVICE(0x0547, 0x2131) },      /* An2131 chip, no boot ROM */
 808         { USB_DEVICE(0x0547, 0x9999) },
 809         { }                                             /* Terminating entry */
 810 };
 811
 812 MODULE_DEVICE_TABLE (usb, dabusb_ids);
 813
 814 static struct usb_driver dabusb_driver = {
 815         .name =         "dabusb",
 816         .probe =        dabusb_probe,
 817         .disconnect =   dabusb_disconnect,
 818         .id_table =     dabusb_ids,
 819 };
 820
 821 /* --------------------------------------------------------------------- */
 822
 823 static int __init dabusb_init (void)
 824 {
 825         int retval;
 826         unsigned u;
 827
 828         /* initialize struct */
 829         for (u = 0; u < NRDABUSB; u++) {
 830                 pdabusb_t s = &dabusb[u];
 831                 memset (s, 0, sizeof (dabusb_t));
 832                 mutex_init (&s->mutex);
 833                 s->usbdev = NULL;
 834                 s->total_buffer_size = buffers;
 835                 init_waitqueue_head (&s->wait);
 836                 init_waitqueue_head (&s->remove_ok);
 837                 spin_lock_init (&s->lock);
 838                 INIT_LIST_HEAD (&s->free_buff_list);
 839                 INIT_LIST_HEAD (&s->rec_buff_list);
 840         }
 841
 842         /* register misc device */
 843         retval = usb_register(&dabusb_driver);
 844         if (retval)
 845                 goto out;
 846
 847         dbg("dabusb_init: driver registered");
 848
 849         info(DRIVER_VERSION ":" DRIVER_DESC);
 850
 851 out:
 852         return retval;
 853 }
 854
 855 static void __exit dabusb_cleanup (void)
 856 {
 857         dbg("dabusb_cleanup");
 858
 859         usb_deregister (&dabusb_driver);
 860 }
 861
 862 /* --------------------------------------------------------------------- */
 863
 864 MODULE_AUTHOR( DRIVER_AUTHOR );
 865 MODULE_DESCRIPTION( DRIVER_DESC );
 866 MODULE_LICENSE("GPL");
 867
 868 module_param(buffers, int, 0);
 869 MODULE_PARM_DESC (buffers, "Number of buffers (default=256)");
 870
 871 module_init (dabusb_init);
 872 module_exit (dabusb_cleanup);
 873
 874 /* --------------------------------------------------------------------- */