drivers/media/dvb/b2c2/flexcop-usb.c

   1 /*
   2  * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
   3  *
   4  * flexcop-usb.c - covers the USB part.
   5  *
   6  * see flexcop.c for copyright information.
   7  */
   8
   9 #define FC_LOG_PREFIX "flexcop_usb"
  10 #include "flexcop-usb.h"
  11 #include "flexcop-common.h"
  12
  13 /* Version information */
  14 #define DRIVER_VERSION "0.1"
  15 #define DRIVER_NAME "Technisat/B2C2 FlexCop II/IIb/III Digital TV USB Driver"
  16 #define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de>"
  17
  18 /* debug */
  19 #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
  20 #define dprintk(level,args...) \
  21             do { if ((debug & level)) { printk(args); } } while (0)
  22 #define debug_dump(b,l,method) {\
  23         int i; \
  24         for (i = 0; i < l; i++) method("%02x ", b[i]); \
  25         method("\n");\
  26 }
  27
  28 #define DEBSTATUS ""
  29 #else
  30 #define dprintk(level,args...)
  31 #define debug_dump(b,l,method)
  32 #define DEBSTATUS " (debugging is not enabled)"
  33 #endif
  34
  35 static int debug;
  36 module_param(debug, int, 0644);
  37 MODULE_PARM_DESC(debug, "set debugging level (1=info,ts=2,ctrl=4,i2c=8,v8mem=16 (or-able))." DEBSTATUS);
  38 #undef DEBSTATUS
  39
  40 #define deb_info(args...) dprintk(0x01,args)
  41 #define deb_ts(args...)   dprintk(0x02,args)
  42 #define deb_ctrl(args...) dprintk(0x04,args)
  43 #define deb_i2c(args...)  dprintk(0x08,args)
  44 #define deb_v8(args...)   dprintk(0x10,args)
  45
  46 /* JLP 111700: we will include the 1 bit gap between the upper and lower 3 bits
  47  * in the IBI address, to make the V8 code simpler.
  48  * PCI ADDRESS FORMAT: 0x71C -> 0000 0111 0001 1100 (these are the six bits used)
  49  *                  in general: 0000 0HHH 000L LL00
  50  * IBI ADDRESS FORMAT:                    RHHH BLLL
  51  *
  52  * where R is the read(1)/write(0) bit, B is the busy bit
  53  * and HHH and LLL are the two sets of three bits from the PCI address.
  54  */
  55 #define B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(usPCI) (u8) (((usPCI >> 2) & 0x07) + ((usPCI >> 4) & 0x70))
  56 #define B2C2_FLEX_INTERNALADDR_TO_PCIOFFSET(ucAddr) (u16) (((ucAddr & 0x07) << 2) + ((ucAddr & 0x70) << 4))
  57
  58 /*
  59  * DKT 020228
  60  * - forget about this VENDOR_BUFFER_SIZE, read and write register
  61  *   deal with DWORD or 4 bytes, that should be should from now on
  62  * - from now on, we don't support anything older than firm 1.00
  63  *   I eliminated the write register as a 2 trip of writing hi word and lo word
  64  *   and force this to write only 4 bytes at a time.
  65  *   NOTE: this should work with all the firmware from 1.00 and newer
  66  */
  67 static int flexcop_usb_readwrite_dw(struct flexcop_device *fc, u16 wRegOffsPCI, u32 *val, u8 read)
  68 {
  69         struct flexcop_usb *fc_usb = fc->bus_specific;
  70         u8 request = read ? B2C2_USB_READ_REG : B2C2_USB_WRITE_REG;
  71         u8 request_type = (read ? USB_DIR_IN : USB_DIR_OUT) | USB_TYPE_VENDOR;
  72         u8 wAddress = B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(wRegOffsPCI) | (read ? 0x80 : 0);
  73
  74         int len = usb_control_msg(fc_usb->udev,
  75                         read ? B2C2_USB_CTRL_PIPE_IN : B2C2_USB_CTRL_PIPE_OUT,
  76                         request,
  77                         request_type,  /* 0xc0 read or 0x40 write*/
  78                         wAddress,
  79                         0,
  80                         val,
  81                         sizeof(u32),
  82                         B2C2_WAIT_FOR_OPERATION_RDW * HZ);
  83
  84         if (len != sizeof(u32)) {
  85                 err("error while %s dword from %d (%d).",read ? "reading" : "writing",
  86                         wAddress,wRegOffsPCI);
  87                 return -EIO;
  88         }
  89         return 0;
  90 }
  91
  92 /*
  93  * DKT 010817 - add support for V8 memory read/write and flash update
  94  */
  95 static int flexcop_usb_v8_memory_req(struct flexcop_usb *fc_usb,
  96                 flexcop_usb_request_t req, u8 page, u16 wAddress,
  97                 u8 *pbBuffer,u32 buflen)
  98 {
  99 //      u8 dwRequestType;
 100         u8 request_type = USB_TYPE_VENDOR;
 101         u16 wIndex;
 102         int nWaitTime,pipe,len;
 103
 104         wIndex = page << 8;
 105
 106         switch (req) {
 107                 case B2C2_USB_READ_V8_MEM:
 108                         nWaitTime = B2C2_WAIT_FOR_OPERATION_V8READ;
 109                         request_type |= USB_DIR_IN;
 110 //                      dwRequestType = (u8) RTYPE_READ_V8_MEMORY;
 111                         pipe = B2C2_USB_CTRL_PIPE_IN;
 112                 break;
 113                 case B2C2_USB_WRITE_V8_MEM:
 114                         wIndex |= pbBuffer[0];
 115                         request_type |= USB_DIR_OUT;
 116                         nWaitTime = B2C2_WAIT_FOR_OPERATION_V8WRITE;
 117 //                      dwRequestType = (u8) RTYPE_WRITE_V8_MEMORY;
 118                         pipe = B2C2_USB_CTRL_PIPE_OUT;
 119                 break;
 120                 case B2C2_USB_FLASH_BLOCK:
 121                         request_type |= USB_DIR_OUT;
 122                         nWaitTime = B2C2_WAIT_FOR_OPERATION_V8FLASH;
 123 //                      dwRequestType = (u8) RTYPE_WRITE_V8_FLASH;
 124                         pipe = B2C2_USB_CTRL_PIPE_OUT;
 125                 break;
 126                 default:
 127                         deb_info("unsupported request for v8_mem_req %x.\n",req);
 128                 return -EINVAL;
 129         }
 130         deb_v8("v8mem: %02x %02x %04x %04x, len: %d\n",request_type,req,
 131                         wAddress,wIndex,buflen);
 132
 133         len = usb_control_msg(fc_usb->udev,pipe,
 134                         req,
 135                         request_type,
 136                         wAddress,
 137                         wIndex,
 138                         pbBuffer,
 139                         buflen,
 140                         nWaitTime * HZ);
 141
 142         debug_dump(pbBuffer,len,deb_v8);
 143
 144         return len == buflen ? 0 : -EIO;
 145 }
 146
 147 #define bytes_left_to_read_on_page(paddr,buflen) \
 148                         ((V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)) > buflen \
 149                         ? buflen : (V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)))
 150
 151 static int flexcop_usb_memory_req(struct flexcop_usb *fc_usb,flexcop_usb_request_t req,
 152                 flexcop_usb_mem_page_t page_start, u32 addr, int extended, u8 *buf, u32 len)
 153 {
 154         int i,ret = 0;
 155         u16 wMax;
 156         u32 pagechunk = 0;
 157
 158         switch(req) {
 159                 case B2C2_USB_READ_V8_MEM:  wMax = USB_MEM_READ_MAX; break;
 160                 case B2C2_USB_WRITE_V8_MEM:     wMax = USB_MEM_WRITE_MAX; break;
 161                 case B2C2_USB_FLASH_BLOCK:  wMax = USB_FLASH_MAX; break;
 162                 default:
 163                         return -EINVAL;
 164                 break;
 165         }
 166         for (i = 0; i < len;) {
 167                 pagechunk = wMax < bytes_left_to_read_on_page(addr,len) ? wMax : bytes_left_to_read_on_page(addr,len);
 168                 deb_info("%x\n",(addr & V8_MEMORY_PAGE_MASK) | (V8_MEMORY_EXTENDED*extended));
 169                 if ((ret = flexcop_usb_v8_memory_req(fc_usb,req,
 170                                 page_start + (addr / V8_MEMORY_PAGE_SIZE), /* actual page */
 171                                 (addr & V8_MEMORY_PAGE_MASK) | (V8_MEMORY_EXTENDED*extended),
 172                                 &buf[i],pagechunk)) < 0)
 173                         return ret;
 174
 175                 addr += pagechunk;
 176                 len -= pagechunk;
 177         }
 178         return 0;
 179 }
 180
 181 static int flexcop_usb_get_mac_addr(struct flexcop_device *fc, int extended)
 182 {
 183         return flexcop_usb_memory_req(fc->bus_specific,B2C2_USB_READ_V8_MEM,
 184                         V8_MEMORY_PAGE_FLASH,0x1f010,1,fc->dvb_adapter.proposed_mac,6);
 185 }
 186
 187 #if 0
 188 static int flexcop_usb_utility_req(struct flexcop_usb *fc_usb, int set,
 189                 flexcop_usb_utility_function_t func, u8 extra, u16 wIndex,
 190                 u16 buflen, u8 *pvBuffer)
 191 {
 192         u16 wValue;
 193         u8 request_type = (set ? USB_DIR_OUT : USB_DIR_IN) | USB_TYPE_VENDOR;
 194 //      u8 dwRequestType = (u8) RTYPE_GENERIC,
 195         int nWaitTime = 2,
 196                 pipe = set ? B2C2_USB_CTRL_PIPE_OUT : B2C2_USB_CTRL_PIPE_IN,
 197                 len;
 198
 199         wValue = (func << 8) | extra;
 200
 201         len = usb_control_msg(fc_usb->udev,pipe,
 202                         B2C2_USB_UTILITY,
 203                         request_type,
 204                         wValue,
 205                         wIndex,
 206                         pvBuffer,
 207                         buflen,
 208                         nWaitTime * HZ);
 209         return len == buflen ? 0 : -EIO;
 210 }
 211 #endif
 212
 213 /* usb i2c stuff */
 214 static int flexcop_usb_i2c_req(struct flexcop_usb *fc_usb,
 215                 flexcop_usb_request_t req, flexcop_usb_i2c_function_t func,
 216                 flexcop_i2c_port_t port, u8 chipaddr, u8 addr, u8 *buf, u8 buflen)
 217 {
 218         u16 wValue, wIndex;
 219         int nWaitTime,pipe,len;
 220 //      u8 dwRequestType;
 221         u8 request_type = USB_TYPE_VENDOR;
 222
 223         switch (func) {
 224                 case USB_FUNC_I2C_WRITE:
 225                 case USB_FUNC_I2C_MULTIWRITE:
 226                 case USB_FUNC_I2C_REPEATWRITE:
 227                 /* DKT 020208 - add this to support special case of DiSEqC */
 228                 case USB_FUNC_I2C_CHECKWRITE:
 229                         pipe = B2C2_USB_CTRL_PIPE_OUT;
 230                         nWaitTime = 2;
 231 //                      dwRequestType = (u8) RTYPE_GENERIC;
 232                         request_type |= USB_DIR_OUT;
 233                 break;
 234                 case USB_FUNC_I2C_READ:
 235                 case USB_FUNC_I2C_REPEATREAD:
 236                         pipe = B2C2_USB_CTRL_PIPE_IN;
 237                         nWaitTime = 2;
 238 //                      dwRequestType = (u8) RTYPE_GENERIC;
 239                         request_type |= USB_DIR_IN;
 240                 break;
 241                 default:
 242                         deb_info("unsupported function for i2c_req %x\n",func);
 243                         return -EINVAL;
 244         }
 245         wValue = (func << 8 ) | (port << 4);
 246         wIndex = (chipaddr << 8 ) | addr;
 247
 248         deb_i2c("i2c %2d: %02x %02x %02x %02x %02x %02x\n",func,request_type,req,
 249                 wValue & 0xff, wValue >> 8, wIndex & 0xff, wIndex >> 8);
 250
 251         len = usb_control_msg(fc_usb->udev,pipe,
 252                         req,
 253                         request_type,
 254                         wValue,
 255                         wIndex,
 256                         buf,
 257                         buflen,
 258                         nWaitTime * HZ);
 259
 260         return len == buflen ? 0 : -EREMOTEIO;
 261 }
 262
 263 /* actual bus specific access functions, make sure prototype are/will be equal to pci */
 264 static flexcop_ibi_value flexcop_usb_read_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register reg)
 265 {
 266         flexcop_ibi_value val;
 267         val.raw = 0;
 268         flexcop_usb_readwrite_dw(fc,reg, &val.raw, 1);
 269         return val;
 270 }
 271
 272 static int flexcop_usb_write_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register reg, flexcop_ibi_value val)
 273 {
 274         return flexcop_usb_readwrite_dw(fc,reg, &val.raw, 0);
 275 }
 276
 277 static int flexcop_usb_i2c_request(struct flexcop_device *fc, flexcop_access_op_t op,
 278                 flexcop_i2c_port_t port, u8 chipaddr, u8 addr, u8 *buf, u16 len)
 279 {
 280         if (op == FC_READ)
 281                 return flexcop_usb_i2c_req(fc->bus_specific,B2C2_USB_I2C_REQUEST,USB_FUNC_I2C_READ,port,chipaddr,addr,buf,len);
 282         else
 283                 return flexcop_usb_i2c_req(fc->bus_specific,B2C2_USB_I2C_REQUEST,USB_FUNC_I2C_WRITE,port,chipaddr,addr,buf,len);
 284 }
 285
 286 static void flexcop_usb_process_frame(struct flexcop_usb *fc_usb, u8 *buffer, int buffer_length)
 287 {
 288         u8 *b;
 289         int l;
 290
 291         deb_ts("tmp_buffer_length=%d, buffer_length=%d\n", fc_usb->tmp_buffer_length, buffer_length);
 292
 293         if (fc_usb->tmp_buffer_length > 0) {
 294                 memcpy(fc_usb->tmp_buffer+fc_usb->tmp_buffer_length, buffer, buffer_length);
 295                 fc_usb->tmp_buffer_length += buffer_length;
 296                 b = fc_usb->tmp_buffer;
 297                 l = fc_usb->tmp_buffer_length;
 298         } else {
 299                 b=buffer;
 300                 l=buffer_length;
 301         }
 302
 303         while (l >= 190) {
 304                 if (*b == 0xff)
 305                         switch (*(b+1) & 0x03) {
 306                                 case 0x01: /* media packet */
 307                                         if ( *(b+2) == 0x47 )
 308                                                 flexcop_pass_dmx_packets(fc_usb->fc_dev, b+2, 1);
 309                                         else
 310                                                 deb_ts("not ts packet %02x %02x %02x %02x \n", *(b+2), *(b+3), *(b+4), *(b+5) );
 311
 312                                         b += 190;
 313                                         l -= 190;
 314                                 break;
 315                                 default:
 316                                         deb_ts("wrong packet type\n");
 317                                         l = 0;
 318                                 break;
 319                         }
 320                 else {
 321                         deb_ts("wrong header\n");
 322                         l = 0;
 323                 }
 324         }
 325
 326         if (l>0)
 327                 memcpy(fc_usb->tmp_buffer, b, l);
 328         fc_usb->tmp_buffer_length = l;
 329 }
 330
 331 static void flexcop_usb_urb_complete(struct urb *urb)
 332 {
 333         struct flexcop_usb *fc_usb = urb->context;
 334         int i;
 335
 336         if (urb->actual_length > 0)
 337                 deb_ts("urb completed, bufsize: %d actlen; %d\n",urb->transfer_buffer_length, urb->actual_length);
 338
 339         for (i = 0; i < urb->number_of_packets; i++) {
 340                 if (urb->iso_frame_desc[i].status < 0) {
 341                         err("iso frame descriptor %d has an error: %d\n",i,urb->iso_frame_desc[i].status);
 342                 } else
 343                         if (urb->iso_frame_desc[i].actual_length > 0) {
 344                                 deb_ts("passed %d bytes to the demux\n",urb->iso_frame_desc[i].actual_length);
 345
 346                                 flexcop_usb_process_frame(fc_usb,
 347                                         urb->transfer_buffer + urb->iso_frame_desc[i].offset,
 348                                         urb->iso_frame_desc[i].actual_length);
 349                 }
 350                 urb->iso_frame_desc[i].status = 0;
 351                 urb->iso_frame_desc[i].actual_length = 0;
 352         }
 353
 354         usb_submit_urb(urb,GFP_ATOMIC);
 355 }
 356
 357 static int flexcop_usb_stream_control(struct flexcop_device *fc, int onoff)
 358 {
 359         /* submit/kill iso packets */
 360         return 0;
 361 }
 362
 363 static void flexcop_usb_transfer_exit(struct flexcop_usb *fc_usb)
 364 {
 365         int i;
 366         for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)
 367                 if (fc_usb->iso_urb[i] != NULL) {
 368                         deb_ts("unlinking/killing urb no. %d\n",i);
 369                         usb_kill_urb(fc_usb->iso_urb[i]);
 370                         usb_free_urb(fc_usb->iso_urb[i]);
 371                 }
 372
 373         if (fc_usb->iso_buffer != NULL)
 374                 pci_free_consistent(NULL,fc_usb->buffer_size, fc_usb->iso_buffer, fc_usb->dma_addr);
 375 }
 376
 377 static int flexcop_usb_transfer_init(struct flexcop_usb *fc_usb)
 378 {
 379         u16 frame_size = fc_usb->uintf->cur_altsetting->endpoint[0].desc.wMaxPacketSize;
 380         int bufsize = B2C2_USB_NUM_ISO_URB * B2C2_USB_FRAMES_PER_ISO * frame_size,i,j,ret;
 381         int buffer_offset = 0;
 382
 383         deb_ts("creating %d iso-urbs with %d frames each of %d bytes size = %d.\n",
 384                         B2C2_USB_NUM_ISO_URB, B2C2_USB_FRAMES_PER_ISO, frame_size,bufsize);
 385
 386         fc_usb->iso_buffer = pci_alloc_consistent(NULL,bufsize,&fc_usb->dma_addr);
 387         if (fc_usb->iso_buffer == NULL)
 388                 return -ENOMEM;
 389         memset(fc_usb->iso_buffer, 0, bufsize);
 390         fc_usb->buffer_size = bufsize;
 391
 392         /* creating iso urbs */
 393         for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)
 394                 if (!(fc_usb->iso_urb[i] = usb_alloc_urb(B2C2_USB_FRAMES_PER_ISO,GFP_ATOMIC))) {
 395                         ret = -ENOMEM;
 396                         goto urb_error;
 397                 }
 398         /* initialising and submitting iso urbs */
 399         for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {
 400                 int frame_offset = 0;
 401                 struct urb *urb = fc_usb->iso_urb[i];
 402                 deb_ts("initializing and submitting urb no. %d (buf_offset: %d).\n",i,buffer_offset);
 403
 404                 urb->dev = fc_usb->udev;
 405                 urb->context = fc_usb;
 406                 urb->complete = flexcop_usb_urb_complete;
 407                 urb->pipe = B2C2_USB_DATA_PIPE;
 408                 urb->transfer_flags = URB_ISO_ASAP;
 409                 urb->interval = 1;
 410                 urb->number_of_packets = B2C2_USB_FRAMES_PER_ISO;
 411                 urb->transfer_buffer_length = frame_size * B2C2_USB_FRAMES_PER_ISO;
 412                 urb->transfer_buffer = fc_usb->iso_buffer + buffer_offset;
 413
 414                 buffer_offset += frame_size * B2C2_USB_FRAMES_PER_ISO;
 415                 for (j = 0; j < B2C2_USB_FRAMES_PER_ISO; j++) {
 416                         deb_ts("urb no: %d, frame: %d, frame_offset: %d\n",i,j,frame_offset);
 417                         urb->iso_frame_desc[j].offset = frame_offset;
 418                         urb->iso_frame_desc[j].length = frame_size;
 419                         frame_offset += frame_size;
 420                 }
 421
 422                 if ((ret = usb_submit_urb(fc_usb->iso_urb[i],GFP_ATOMIC))) {
 423                         err("submitting urb %d failed with %d.",i,ret);
 424                         goto urb_error;
 425                 }
 426                 deb_ts("submitted urb no. %d.\n",i);
 427         }
 428
 429 /* SRAM */
 430
 431         flexcop_sram_set_dest(fc_usb->fc_dev,FC_SRAM_DEST_MEDIA | FC_SRAM_DEST_NET |
 432                         FC_SRAM_DEST_CAO | FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_WAN_USB);
 433         flexcop_wan_set_speed(fc_usb->fc_dev,FC_WAN_SPEED_8MBITS);
 434         flexcop_sram_ctrl(fc_usb->fc_dev,1,1,1);
 435
 436         return 0;
 437
 438 urb_error:
 439         flexcop_usb_transfer_exit(fc_usb);
 440         return ret;
 441 }
 442
 443 static int flexcop_usb_init(struct flexcop_usb *fc_usb)
 444 {
 445         /* use the alternate setting with the larges buffer */
 446         usb_set_interface(fc_usb->udev,0,1);
 447         switch (fc_usb->udev->speed) {
 448                 case USB_SPEED_LOW:
 449                         err("cannot handle USB speed because it is to sLOW.");
 450                         return -ENODEV;
 451                         break;
 452                 case USB_SPEED_FULL:
 453                         info("running at FULL speed.");
 454                         break;
 455                 case USB_SPEED_HIGH:
 456                         info("running at HIGH speed.");
 457                         break;
 458                 case USB_SPEED_UNKNOWN: /* fall through */
 459                 default:
 460                         err("cannot handle USB speed because it is unkown.");
 461                         return -ENODEV;
 462         }
 463         usb_set_intfdata(fc_usb->uintf, fc_usb);
 464         return 0;
 465 }
 466
 467 static void flexcop_usb_exit(struct flexcop_usb *fc_usb)
 468 {
 469         usb_set_intfdata(fc_usb->uintf, NULL);
 470 }
 471
 472 static int flexcop_usb_probe(struct usb_interface *intf,
 473                 const struct usb_device_id *id)
 474 {
 475         struct usb_device *udev = interface_to_usbdev(intf);
 476         struct flexcop_usb *fc_usb = NULL;
 477         struct flexcop_device *fc = NULL;
 478         int ret;
 479
 480         if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) {
 481                 err("out of memory\n");
 482                 return -ENOMEM;
 483         }
 484
 485 /* general flexcop init */
 486         fc_usb = fc->bus_specific;
 487         fc_usb->fc_dev = fc;
 488
 489         fc->read_ibi_reg  = flexcop_usb_read_ibi_reg;
 490         fc->write_ibi_reg = flexcop_usb_write_ibi_reg;
 491         fc->i2c_request = flexcop_usb_i2c_request;
 492         fc->get_mac_addr = flexcop_usb_get_mac_addr;
 493
 494         fc->stream_control = flexcop_usb_stream_control;
 495
 496         fc->pid_filtering = 1;
 497         fc->bus_type = FC_USB;
 498
 499         fc->dev = &udev->dev;
 500         fc->owner = THIS_MODULE;
 501
 502 /* bus specific part */
 503         fc_usb->udev = udev;
 504         fc_usb->uintf = intf;
 505         if ((ret = flexcop_usb_init(fc_usb)) != 0)
 506                 goto err_kfree;
 507
 508 /* init flexcop */
 509         if ((ret = flexcop_device_initialize(fc)) != 0)
 510                 goto err_usb_exit;
 511
 512 /* xfer init */
 513         if ((ret = flexcop_usb_transfer_init(fc_usb)) != 0)
 514                 goto err_fc_exit;
 515
 516         info("%s successfully initialized and connected.",DRIVER_NAME);
 517         return 0;
 518
 519 err_fc_exit:
 520         flexcop_device_exit(fc);
 521 err_usb_exit:
 522         flexcop_usb_exit(fc_usb);
 523 err_kfree:
 524         flexcop_device_kfree(fc);
 525         return ret;
 526 }
 527
 528 static void flexcop_usb_disconnect(struct usb_interface *intf)
 529 {
 530         struct flexcop_usb *fc_usb = usb_get_intfdata(intf);
 531         flexcop_usb_transfer_exit(fc_usb);
 532         flexcop_device_exit(fc_usb->fc_dev);
 533         flexcop_usb_exit(fc_usb);
 534         flexcop_device_kfree(fc_usb->fc_dev);
 535         info("%s successfully deinitialized and disconnected.",DRIVER_NAME);
 536 }
 537
 538 static struct usb_device_id flexcop_usb_table [] = {
 539             { USB_DEVICE(0x0af7, 0x0101) },
 540             { }
 541 };
 542 MODULE_DEVICE_TABLE (usb, flexcop_usb_table);
 543
 544 /* usb specific object needed to register this driver with the usb subsystem */
 545 static struct usb_driver flexcop_usb_driver = {
 546         .name           = "b2c2_flexcop_usb",
 547         .probe          = flexcop_usb_probe,
 548         .disconnect = flexcop_usb_disconnect,
 549         .id_table       = flexcop_usb_table,
 550 };
 551
 552 /* module stuff */
 553 static int __init flexcop_usb_module_init(void)
 554 {
 555         int result;
 556         if ((result = usb_register(&flexcop_usb_driver))) {
 557                 err("usb_register failed. (%d)",result);
 558                 return result;
 559         }
 560
 561         return 0;
 562 }
 563
 564 static void __exit flexcop_usb_module_exit(void)
 565 {
 566         /* deregister this driver from the USB subsystem */
 567         usb_deregister(&flexcop_usb_driver);
 568 }
 569
 570 module_init(flexcop_usb_module_init);
 571 module_exit(flexcop_usb_module_exit);
 572
 573 MODULE_AUTHOR(DRIVER_AUTHOR);
 574 MODULE_DESCRIPTION(DRIVER_NAME);
 575 MODULE_LICENSE("GPL");