drivers/usb/media/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
  42 #include "dabusb.h"
  43 #include "dabfirmware.h"
  44
  45 /*
  46  * Version Information
  47  */
  48 #define DRIVER_VERSION "v1.54"
  49 #define DRIVER_AUTHOR "Deti Fliegl, deti@fliegl.de"
  50 #define DRIVER_DESC "DAB-USB Interface Driver for Linux (c)1999"
  51
  52 /* --------------------------------------------------------------------- */
  53
  54 #ifdef CONFIG_USB_DYNAMIC_MINORS
  55 #define NRDABUSB 256
  56 #else
  57 #define NRDABUSB 4
  58 #endif
  59
  60 /*-------------------------------------------------------------------*/
  61
  62 static dabusb_t dabusb[NRDABUSB];
  63 static int buffers = 256;
  64 static struct usb_driver dabusb_driver;
  65
  66 /*-------------------------------------------------------------------*/
  67
  68 static int dabusb_add_buf_tail (pdabusb_t s, struct list_head *dst, struct list_head *src)
  69 {
  70         unsigned long flags;
  71         struct list_head *tmp;
  72         int ret = 0;
  73
  74         spin_lock_irqsave (&s->lock, flags);
  75
  76         if (list_empty (src)) {
  77                 // no elements in source buffer
  78                 ret = -1;
  79                 goto err;
  80         }
  81         tmp = src->next;
  82         list_move_tail (tmp, dst);
  83
  84   err:  spin_unlock_irqrestore (&s->lock, flags);
  85         return ret;
  86 }
  87 /*-------------------------------------------------------------------*/
  88 #ifdef DEBUG
  89 static void dump_urb (struct urb *urb)
  90 {
  91         dbg("urb                   :%p", urb);
  92         dbg("dev                   :%p", urb->dev);
  93         dbg("pipe                  :%08X", urb->pipe);
  94         dbg("status                :%d", urb->status);
  95         dbg("transfer_flags        :%08X", urb->transfer_flags);
  96         dbg("transfer_buffer       :%p", urb->transfer_buffer);
  97         dbg("transfer_buffer_length:%d", urb->transfer_buffer_length);
  98         dbg("actual_length         :%d", urb->actual_length);
  99         dbg("setup_packet          :%p", urb->setup_packet);
 100         dbg("start_frame           :%d", urb->start_frame);
 101         dbg("number_of_packets     :%d", urb->number_of_packets);
 102         dbg("interval              :%d", urb->interval);
 103         dbg("error_count           :%d", urb->error_count);
 104         dbg("context               :%p", urb->context);
 105         dbg("complete              :%p", urb->complete);
 106 }
 107 #endif
 108 /*-------------------------------------------------------------------*/
 109 static int dabusb_cancel_queue (pdabusb_t s, struct list_head *q)
 110 {
 111         unsigned long flags;
 112         pbuff_t b;
 113
 114         dbg("dabusb_cancel_queue");
 115
 116         spin_lock_irqsave (&s->lock, flags);
 117
 118         list_for_each_entry(b, q, buff_list) {
 119 #ifdef DEBUG
 120                 dump_urb(b->purb);
 121 #endif
 122                 usb_unlink_urb (b->purb);
 123         }
 124         spin_unlock_irqrestore (&s->lock, flags);
 125         return 0;
 126 }
 127 /*-------------------------------------------------------------------*/
 128 static int dabusb_free_queue (struct list_head *q)
 129 {
 130         struct list_head *tmp;
 131         struct list_head *p;
 132         pbuff_t b;
 133
 134         dbg("dabusb_free_queue");
 135         for (p = q->next; p != q;) {
 136                 b = list_entry (p, buff_t, buff_list);
 137
 138 #ifdef DEBUG
 139                 dump_urb(b->purb);
 140 #endif
 141                 if (b->purb->transfer_buffer)
 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, struct pt_regs *regs)
 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 = (pbuff_t) kmalloc (sizeof (buff_t), GFP_KERNEL);
 222                 if (!b) {
 223                         err("kmalloc(sizeof(buff_t))==NULL");
 224                         goto err;
 225                 }
 226                 memset (b, 0, sizeof (buff_t));
 227                 b->s = s;
 228                 b->purb = usb_alloc_urb(packets, GFP_KERNEL);
 229                 if (!b->purb) {
 230                         err("usb_alloc_urb == NULL");
 231                         kfree (b);
 232                         goto err;
 233                 }
 234
 235                 b->purb->transfer_buffer = kmalloc (transfer_buffer_length, GFP_KERNEL);
 236                 if (!b->purb->transfer_buffer) {
 237                         kfree (b->purb);
 238                         kfree (b);
 239                         err("kmalloc(%d)==NULL", transfer_buffer_length);
 240                         goto err;
 241                 }
 242
 243                 b->purb->transfer_buffer_length = transfer_buffer_length;
 244                 b->purb->number_of_packets = packets;
 245                 b->purb->complete = dabusb_iso_complete;
 246                 b->purb->context = b;
 247                 b->purb->dev = s->usbdev;
 248                 b->purb->pipe = pipe;
 249                 b->purb->transfer_flags = URB_ISO_ASAP;
 250
 251                 for (i = 0; i < packets; i++) {
 252                         b->purb->iso_frame_desc[i].offset = i * pipesize;
 253                         b->purb->iso_frame_desc[i].length = pipesize;
 254                 }
 255
 256                 buffers += transfer_buffer_length;
 257                 list_add_tail (&b->buff_list, &s->free_buff_list);
 258         }
 259         s->got_mem = buffers;
 260
 261         return 0;
 262
 263         err:
 264         dabusb_free_buffers (s);
 265         return -ENOMEM;
 266 }
 267 /*-------------------------------------------------------------------*/
 268 static int dabusb_bulk (pdabusb_t s, pbulk_transfer_t pb)
 269 {
 270         int ret;
 271         unsigned int pipe;
 272         int actual_length;
 273
 274         dbg("dabusb_bulk");
 275
 276         if (!pb->pipe)
 277                 pipe = usb_rcvbulkpipe (s->usbdev, 2);
 278         else
 279                 pipe = usb_sndbulkpipe (s->usbdev, 2);
 280
 281         ret=usb_bulk_msg(s->usbdev, pipe, pb->data, pb->size, &actual_length, 100);
 282         if(ret<0) {
 283                 err("dabusb: usb_bulk_msg failed(%d)",ret);
 284
 285                 if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) {
 286                         err("set_interface failed");
 287                         return -EINVAL;
 288                 }
 289
 290         }
 291
 292         if( ret == -EPIPE ) {
 293                 warn("CLEAR_FEATURE request to remove STALL condition.");
 294                 if(usb_clear_halt(s->usbdev, usb_pipeendpoint(pipe)))
 295                         err("request failed");
 296         }
 297
 298         pb->size = actual_length;
 299         return ret;
 300 }
 301 /* --------------------------------------------------------------------- */
 302 static int dabusb_writemem (pdabusb_t s, int pos, unsigned char *data, int len)
 303 {
 304         int ret;
 305         unsigned char *transfer_buffer =  kmalloc (len, GFP_KERNEL);
 306
 307         if (!transfer_buffer) {
 308                 err("dabusb_writemem: kmalloc(%d) failed.", len);
 309                 return -ENOMEM;
 310         }
 311
 312         memcpy (transfer_buffer, data, len);
 313
 314         ret=usb_control_msg(s->usbdev, usb_sndctrlpipe( s->usbdev, 0 ), 0xa0, 0x40, pos, 0, transfer_buffer, len, 300);
 315
 316         kfree (transfer_buffer);
 317         return ret;
 318 }
 319 /* --------------------------------------------------------------------- */
 320 static int dabusb_8051_reset (pdabusb_t s, unsigned char reset_bit)
 321 {
 322         dbg("dabusb_8051_reset: %d",reset_bit);
 323         return dabusb_writemem (s, CPUCS_REG, &reset_bit, 1);
 324 }
 325 /* --------------------------------------------------------------------- */
 326 static int dabusb_loadmem (pdabusb_t s, const char *fname)
 327 {
 328         int ret;
 329         PINTEL_HEX_RECORD ptr = firmware;
 330
 331         dbg("Enter dabusb_loadmem (internal)");
 332
 333         ret = dabusb_8051_reset (s, 1);
 334         while (ptr->Type == 0) {
 335
 336                 dbg("dabusb_writemem: %04X %p %d)", ptr->Address, ptr->Data, ptr->Length);
 337
 338                 ret = dabusb_writemem (s, ptr->Address, ptr->Data, ptr->Length);
 339                 if (ret < 0) {
 340                         err("dabusb_writemem failed (%d %04X %p %d)", ret, ptr->Address, ptr->Data, ptr->Length);
 341                         break;
 342                 }
 343                 ptr++;
 344         }
 345         ret = dabusb_8051_reset (s, 0);
 346
 347         dbg("dabusb_loadmem: exit");
 348
 349         return ret;
 350 }
 351 /* --------------------------------------------------------------------- */
 352 static int dabusb_fpga_clear (pdabusb_t s, pbulk_transfer_t b)
 353 {
 354         b->size = 4;
 355         b->data[0] = 0x2a;
 356         b->data[1] = 0;
 357         b->data[2] = 0;
 358         b->data[3] = 0;
 359
 360         dbg("dabusb_fpga_clear");
 361
 362         return dabusb_bulk (s, b);
 363 }
 364 /* --------------------------------------------------------------------- */
 365 static int dabusb_fpga_init (pdabusb_t s, pbulk_transfer_t b)
 366 {
 367         b->size = 4;
 368         b->data[0] = 0x2c;
 369         b->data[1] = 0;
 370         b->data[2] = 0;
 371         b->data[3] = 0;
 372
 373         dbg("dabusb_fpga_init");
 374
 375         return dabusb_bulk (s, b);
 376 }
 377 /* --------------------------------------------------------------------- */
 378 static int dabusb_fpga_download (pdabusb_t s, const char *fname)
 379 {
 380         pbulk_transfer_t b = kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL);
 381         unsigned int blen, n;
 382         int ret;
 383         unsigned char *buf = bitstream;
 384
 385         dbg("Enter dabusb_fpga_download (internal)");
 386
 387         if (!b) {
 388                 err("kmalloc(sizeof(bulk_transfer_t))==NULL");
 389                 return -ENOMEM;
 390         }
 391
 392         b->pipe = 1;
 393         ret = dabusb_fpga_clear (s, b);
 394         mdelay (10);
 395         blen = buf[73] + (buf[72] << 8);
 396
 397         dbg("Bitstream len: %i", blen);
 398
 399         b->data[0] = 0x2b;
 400         b->data[1] = 0;
 401         b->data[2] = 0;
 402         b->data[3] = 60;
 403
 404         for (n = 0; n <= blen + 60; n += 60) {
 405                 // some cclks for startup
 406                 b->size = 64;
 407                 memcpy (b->data + 4, buf + 74 + n, 60);
 408                 ret = dabusb_bulk (s, b);
 409                 if (ret < 0) {
 410                         err("dabusb_bulk failed.");
 411                         break;
 412                 }
 413                 mdelay (1);
 414         }
 415
 416         ret = dabusb_fpga_init (s, b);
 417         kfree (b);
 418
 419         dbg("exit dabusb_fpga_download");
 420
 421         return ret;
 422 }
 423
 424 static int dabusb_stop (pdabusb_t s)
 425 {
 426         dbg("dabusb_stop");
 427
 428         s->state = _stopped;
 429         dabusb_cancel_queue (s, &s->rec_buff_list);
 430
 431         dbg("pending_io: %d", s->pending_io.counter);
 432
 433         s->pending_io.counter = 0;
 434         return 0;
 435 }
 436
 437 static int dabusb_startrek (pdabusb_t s)
 438 {
 439         if (!s->got_mem && s->state != _started) {
 440
 441                 dbg("dabusb_startrek");
 442
 443                 if (dabusb_alloc_buffers (s) < 0)
 444                         return -ENOMEM;
 445                 dabusb_stop (s);
 446                 s->state = _started;
 447                 s->readptr = 0;
 448         }
 449
 450         if (!list_empty (&s->free_buff_list)) {
 451                 pbuff_t end;
 452                 int ret;
 453
 454         while (!dabusb_add_buf_tail (s, &s->rec_buff_list, &s->free_buff_list)) {
 455
 456                         dbg("submitting: end:%p s->rec_buff_list:%p", s->rec_buff_list.prev, &s->rec_buff_list);
 457
 458                         end = list_entry (s->rec_buff_list.prev, buff_t, buff_list);
 459
 460                         ret = usb_submit_urb (end->purb, GFP_KERNEL);
 461                         if (ret) {
 462                                 err("usb_submit_urb returned:%d", ret);
 463                                 if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list))
 464                                         err("startrek: dabusb_add_buf_tail failed");
 465                                 break;
 466                         }
 467                         else
 468                                 atomic_inc (&s->pending_io);
 469                 }
 470                 dbg("pending_io: %d",s->pending_io.counter);
 471         }
 472
 473         return 0;
 474 }
 475
 476 static ssize_t dabusb_read (struct file *file, char __user *buf, size_t count, loff_t * ppos)
 477 {
 478         pdabusb_t s = (pdabusb_t) file->private_data;
 479         unsigned long flags;
 480         unsigned ret = 0;
 481         int rem;
 482         int cnt;
 483         pbuff_t b;
 484         struct urb *purb = NULL;
 485
 486         dbg("dabusb_read");
 487
 488         if (*ppos)
 489                 return -ESPIPE;
 490
 491         if (s->remove_pending)
 492                 return -EIO;
 493
 494
 495         if (!s->usbdev)
 496                 return -EIO;
 497
 498         while (count > 0) {
 499                 dabusb_startrek (s);
 500
 501                 spin_lock_irqsave (&s->lock, flags);
 502
 503                 if (list_empty (&s->rec_buff_list)) {
 504
 505                         spin_unlock_irqrestore(&s->lock, flags);
 506
 507                         err("error: rec_buf_list is empty");
 508                         goto err;
 509                 }
 510
 511                 b = list_entry (s->rec_buff_list.next, buff_t, buff_list);
 512                 purb = b->purb;
 513
 514                 spin_unlock_irqrestore(&s->lock, flags);
 515
 516                 if (purb->status == -EINPROGRESS) {
 517                         if (file->f_flags & O_NONBLOCK)         // return nonblocking
 518                          {
 519                                 if (!ret)
 520                                         ret = -EAGAIN;
 521                                 goto err;
 522                         }
 523
 524                         interruptible_sleep_on (&s->wait);
 525
 526                         if (signal_pending (current)) {
 527                                 if (!ret)
 528                                         ret = -ERESTARTSYS;
 529                                 goto err;
 530                         }
 531
 532                         spin_lock_irqsave (&s->lock, flags);
 533
 534                         if (list_empty (&s->rec_buff_list)) {
 535                                 spin_unlock_irqrestore(&s->lock, flags);
 536                                 err("error: still no buffer available.");
 537                                 goto err;
 538                         }
 539                         spin_unlock_irqrestore(&s->lock, flags);
 540                         s->readptr = 0;
 541                 }
 542                 if (s->remove_pending) {
 543                         ret = -EIO;
 544                         goto err;
 545                 }
 546
 547                 rem = purb->actual_length - s->readptr;         // set remaining bytes to copy
 548
 549                 if (count >= rem)
 550                         cnt = rem;
 551                 else
 552                         cnt = count;
 553
 554                 dbg("copy_to_user:%p %p %d",buf, purb->transfer_buffer + s->readptr, cnt);
 555
 556                 if (copy_to_user (buf, purb->transfer_buffer + s->readptr, cnt)) {
 557                         err("read: copy_to_user failed");
 558                         if (!ret)
 559                                 ret = -EFAULT;
 560                         goto err;
 561                 }
 562
 563                 s->readptr += cnt;
 564                 count -= cnt;
 565                 buf += cnt;
 566                 ret += cnt;
 567
 568                 if (s->readptr == purb->actual_length) {
 569                         // finished, take next buffer
 570                         if (dabusb_add_buf_tail (s, &s->free_buff_list, &s->rec_buff_list))
 571                                 err("read: dabusb_add_buf_tail failed");
 572                         s->readptr = 0;
 573                 }
 574         }
 575       err:                      //up(&s->mutex);
 576         return ret;
 577 }
 578
 579 static int dabusb_open (struct inode *inode, struct file *file)
 580 {
 581         int devnum = iminor(inode);
 582         pdabusb_t s;
 583
 584         if (devnum < DABUSB_MINOR || devnum >= (DABUSB_MINOR + NRDABUSB))
 585                 return -EIO;
 586
 587         s = &dabusb[devnum - DABUSB_MINOR];
 588
 589         dbg("dabusb_open");
 590         down (&s->mutex);
 591
 592         while (!s->usbdev || s->opened) {
 593                 up (&s->mutex);
 594
 595                 if (file->f_flags & O_NONBLOCK) {
 596                         return -EBUSY;
 597                 }
 598                 msleep_interruptible(500);
 599
 600                 if (signal_pending (current)) {
 601                         return -EAGAIN;
 602                 }
 603                 down (&s->mutex);
 604         }
 605         if (usb_set_interface (s->usbdev, _DABUSB_IF, 1) < 0) {
 606                 up(&s->mutex);
 607                 err("set_interface failed");
 608                 return -EINVAL;
 609         }
 610         s->opened = 1;
 611         up (&s->mutex);
 612
 613         file->f_pos = 0;
 614         file->private_data = s;
 615
 616         return nonseekable_open(inode, file);
 617 }
 618
 619 static int dabusb_release (struct inode *inode, struct file *file)
 620 {
 621         pdabusb_t s = (pdabusb_t) file->private_data;
 622
 623         dbg("dabusb_release");
 624
 625         down (&s->mutex);
 626         dabusb_stop (s);
 627         dabusb_free_buffers (s);
 628         up (&s->mutex);
 629
 630         if (!s->remove_pending) {
 631                 if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0)
 632                         err("set_interface failed");
 633         }
 634         else
 635                 wake_up (&s->remove_ok);
 636
 637         s->opened = 0;
 638         return 0;
 639 }
 640
 641 static int dabusb_ioctl (struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
 642 {
 643         pdabusb_t s = (pdabusb_t) file->private_data;
 644         pbulk_transfer_t pbulk;
 645         int ret = 0;
 646         int version = DABUSB_VERSION;
 647
 648         dbg("dabusb_ioctl");
 649
 650         if (s->remove_pending)
 651                 return -EIO;
 652
 653         down (&s->mutex);
 654
 655         if (!s->usbdev) {
 656                 up (&s->mutex);
 657                 return -EIO;
 658         }
 659
 660         switch (cmd) {
 661
 662         case IOCTL_DAB_BULK:
 663                 pbulk = (pbulk_transfer_t) kmalloc (sizeof (bulk_transfer_t), GFP_KERNEL);
 664
 665                 if (!pbulk) {
 666                         ret = -ENOMEM;
 667                         break;
 668                 }
 669
 670                 if (copy_from_user (pbulk, (void __user *) arg, sizeof (bulk_transfer_t))) {
 671                         ret = -EFAULT;
 672                         kfree (pbulk);
 673                         break;
 674                 }
 675
 676                 ret=dabusb_bulk (s, pbulk);
 677                 if(ret==0)
 678                         if (copy_to_user((void __user *)arg, pbulk,
 679                                          sizeof(bulk_transfer_t)))
 680                                 ret = -EFAULT;
 681                 kfree (pbulk);
 682                 break;
 683
 684         case IOCTL_DAB_OVERRUNS:
 685                 ret = put_user (s->overruns, (unsigned int __user *) arg);
 686                 break;
 687
 688         case IOCTL_DAB_VERSION:
 689                 ret = put_user (version, (unsigned int __user *) arg);
 690                 break;
 691
 692         default:
 693                 ret = -ENOIOCTLCMD;
 694                 break;
 695         }
 696         up (&s->mutex);
 697         return ret;
 698 }
 699
 700 static struct file_operations dabusb_fops =
 701 {
 702         .owner =        THIS_MODULE,
 703         .llseek =       no_llseek,
 704         .read =         dabusb_read,
 705         .ioctl =        dabusb_ioctl,
 706         .open =         dabusb_open,
 707         .release =      dabusb_release,
 708 };
 709
 710 static struct usb_class_driver dabusb_class = {
 711         .name =         "usb/dabusb%d",
 712         .fops =         &dabusb_fops,
 713         .mode =         S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,
 714         .minor_base =   DABUSB_MINOR,
 715 };
 716
 717
 718 /* --------------------------------------------------------------------- */
 719 static int dabusb_probe (struct usb_interface *intf,
 720                          const struct usb_device_id *id)
 721 {
 722         struct usb_device *usbdev = interface_to_usbdev(intf);
 723         int retval;
 724         pdabusb_t s;
 725
 726         dbg("dabusb: probe: vendor id 0x%x, device id 0x%x ifnum:%d",
 727             le16_to_cpu(usbdev->descriptor.idVendor),
 728             le16_to_cpu(usbdev->descriptor.idProduct),
 729             intf->altsetting->desc.bInterfaceNumber);
 730
 731         /* We don't handle multiple configurations */
 732         if (usbdev->descriptor.bNumConfigurations != 1)
 733                 return -ENODEV;
 734
 735         if (intf->altsetting->desc.bInterfaceNumber != _DABUSB_IF &&
 736             le16_to_cpu(usbdev->descriptor.idProduct) == 0x9999)
 737                 return -ENODEV;
 738
 739
 740
 741         s = &dabusb[intf->minor];
 742
 743         down (&s->mutex);
 744         s->remove_pending = 0;
 745         s->usbdev = usbdev;
 746         s->devnum = intf->minor;
 747
 748         if (usb_reset_configuration (usbdev) < 0) {
 749                 err("reset_configuration failed");
 750                 goto reject;
 751         }
 752         if (le16_to_cpu(usbdev->descriptor.idProduct) == 0x2131) {
 753                 dabusb_loadmem (s, NULL);
 754                 goto reject;
 755         }
 756         else {
 757                 dabusb_fpga_download (s, NULL);
 758
 759                 if (usb_set_interface (s->usbdev, _DABUSB_IF, 0) < 0) {
 760                         err("set_interface failed");
 761                         goto reject;
 762                 }
 763         }
 764         dbg("bound to interface: %d", intf->altsetting->desc.bInterfaceNumber);
 765         usb_set_intfdata (intf, s);
 766         up (&s->mutex);
 767
 768         retval = usb_register_dev(intf, &dabusb_class);
 769         if (retval) {
 770                 usb_set_intfdata (intf, NULL);
 771                 return -ENOMEM;
 772         }
 773
 774         return 0;
 775
 776       reject:
 777         up (&s->mutex);
 778         s->usbdev = NULL;
 779         return -ENODEV;
 780 }
 781
 782 static void dabusb_disconnect (struct usb_interface *intf)
 783 {
 784         wait_queue_t __wait;
 785         pdabusb_t s = usb_get_intfdata (intf);
 786
 787         dbg("dabusb_disconnect");
 788
 789         init_waitqueue_entry(&__wait, current);
 790
 791         usb_set_intfdata (intf, NULL);
 792         if (s) {
 793                 usb_deregister_dev (intf, &dabusb_class);
 794                 s->remove_pending = 1;
 795                 wake_up (&s->wait);
 796                 add_wait_queue(&s->remove_ok, &__wait);
 797                 set_current_state(TASK_UNINTERRUPTIBLE);
 798                 if (s->state == _started)
 799                         schedule();
 800                 current->state = TASK_RUNNING;
 801                 remove_wait_queue(&s->remove_ok, &__wait);
 802
 803                 s->usbdev = NULL;
 804                 s->overruns = 0;
 805         }
 806 }
 807
 808 static struct usb_device_id dabusb_ids [] = {
 809         // { USB_DEVICE(0x0547, 0x2131) },      /* An2131 chip, no boot ROM */
 810         { USB_DEVICE(0x0547, 0x9999) },
 811         { }                                             /* Terminating entry */
 812 };
 813
 814 MODULE_DEVICE_TABLE (usb, dabusb_ids);
 815
 816 static struct usb_driver dabusb_driver = {
 817         .owner =        THIS_MODULE,
 818         .name =         "dabusb",
 819         .probe =        dabusb_probe,
 820         .disconnect =   dabusb_disconnect,
 821         .id_table =     dabusb_ids,
 822 };
 823
 824 /* --------------------------------------------------------------------- */
 825
 826 static int __init dabusb_init (void)
 827 {
 828         int retval;
 829         unsigned u;
 830
 831         /* initialize struct */
 832         for (u = 0; u < NRDABUSB; u++) {
 833                 pdabusb_t s = &dabusb[u];
 834                 memset (s, 0, sizeof (dabusb_t));
 835                 init_MUTEX (&s->mutex);
 836                 s->usbdev = NULL;
 837                 s->total_buffer_size = buffers;
 838                 init_waitqueue_head (&s->wait);
 839                 init_waitqueue_head (&s->remove_ok);
 840                 spin_lock_init (&s->lock);
 841                 INIT_LIST_HEAD (&s->free_buff_list);
 842                 INIT_LIST_HEAD (&s->rec_buff_list);
 843         }
 844
 845         /* register misc device */
 846         retval = usb_register(&dabusb_driver);
 847         if (retval)
 848                 goto out;
 849
 850         dbg("dabusb_init: driver registered");
 851
 852         info(DRIVER_VERSION ":" DRIVER_DESC);
 853
 854 out:
 855         return retval;
 856 }
 857
 858 static void __exit dabusb_cleanup (void)
 859 {
 860         dbg("dabusb_cleanup");
 861
 862         usb_deregister (&dabusb_driver);
 863 }
 864
 865 /* --------------------------------------------------------------------- */
 866
 867 MODULE_AUTHOR( DRIVER_AUTHOR );
 868 MODULE_DESCRIPTION( DRIVER_DESC );
 869 MODULE_LICENSE("GPL");
 870
 871 module_param(buffers, int, 0);
 872 MODULE_PARM_DESC (buffers, "Number of buffers (default=256)");
 873
 874 module_init (dabusb_init);
 875 module_exit (dabusb_cleanup);
 876
 877 /* --------------------------------------------------------------------- */