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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III
   4  * flexcop-usb.c - covers the USB part
   5  * see flexcop.c for copyright information
   6  */
   7 #define FC_LOG_PREFIX "flexcop_usb"
   8 #include "flexcop-usb.h"
   9 #include "flexcop-common.h"
  10
  11 /* Version information */
  12 #define DRIVER_VERSION "0.1"
  13 #define DRIVER_NAME "Technisat/B2C2 FlexCop II/IIb/III Digital TV USB Driver"
  14 #define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@posteo.de>"
  15
  16 /* debug */
  17 #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
  18 #define dprintk(level,args...) \
  19         do { if ((debug & level)) printk(args); } while (0)
  20
  21 #define debug_dump(b, l, method) do {\
  22         int i; \
  23         for (i = 0; i < l; i++) \
  24                 method("%02x ", b[i]); \
  25         method("\n"); \
  26 } while (0)
  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 (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) \
  56         (((usPCI >> 2) & 0x07) + ((usPCI >> 4) & 0x70))
  57 #define B2C2_FLEX_INTERNALADDR_TO_PCIOFFSET(ucAddr) (u16) \
  58         (((ucAddr & 0x07) << 2) + ((ucAddr & 0x70) << 4))
  59
  60 /*
  61  * DKT 020228
  62  * - forget about this VENDOR_BUFFER_SIZE, read and write register
  63  *   deal with DWORD or 4 bytes, that should be should from now on
  64  * - from now on, we don't support anything older than firm 1.00
  65  *   I eliminated the write register as a 2 trip of writing hi word and lo word
  66  *   and force this to write only 4 bytes at a time.
  67  *   NOTE: this should work with all the firmware from 1.00 and newer
  68  */
  69 static int flexcop_usb_readwrite_dw(struct flexcop_device *fc, u16 wRegOffsPCI, u32 *val, u8 read)
  70 {
  71         struct flexcop_usb *fc_usb = fc->bus_specific;
  72         u8 request = read ? B2C2_USB_READ_REG : B2C2_USB_WRITE_REG;
  73         u8 request_type = (read ? USB_DIR_IN : USB_DIR_OUT) | USB_TYPE_VENDOR;
  74         u8 wAddress = B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(wRegOffsPCI) |
  75                 (read ? 0x80 : 0);
  76         int ret;
  77
  78         mutex_lock(&fc_usb->data_mutex);
  79         if (!read)
  80                 memcpy(fc_usb->data, val, sizeof(*val));
  81
  82         ret = usb_control_msg(fc_usb->udev,
  83                         read ? B2C2_USB_CTRL_PIPE_IN : B2C2_USB_CTRL_PIPE_OUT,
  84                         request,
  85                         request_type, /* 0xc0 read or 0x40 write */
  86                         wAddress,
  87                         0,
  88                         fc_usb->data,
  89                         sizeof(u32),
  90                         B2C2_WAIT_FOR_OPERATION_RDW * HZ);
  91
  92         if (ret != sizeof(u32)) {
  93                 err("error while %s dword from %d (%d).", read ? "reading" :
  94                                 "writing", wAddress, wRegOffsPCI);
  95                 if (ret >= 0)
  96                         ret = -EIO;
  97         }
  98
  99         if (read && ret >= 0)
 100                 memcpy(val, fc_usb->data, sizeof(*val));
 101         mutex_unlock(&fc_usb->data_mutex);
 102
 103         return ret;
 104 }
 105 /*
 106  * DKT 010817 - add support for V8 memory read/write and flash update
 107  */
 108 static int flexcop_usb_v8_memory_req(struct flexcop_usb *fc_usb,
 109                 flexcop_usb_request_t req, u8 page, u16 wAddress,
 110                 u8 *pbBuffer, u32 buflen)
 111 {
 112         u8 request_type = USB_TYPE_VENDOR;
 113         u16 wIndex;
 114         int nWaitTime, pipe, ret;
 115         wIndex = page << 8;
 116
 117         if (buflen > sizeof(fc_usb->data)) {
 118                 err("Buffer size bigger than max URB control message\n");
 119                 return -EIO;
 120         }
 121
 122         switch (req) {
 123         case B2C2_USB_READ_V8_MEM:
 124                 nWaitTime = B2C2_WAIT_FOR_OPERATION_V8READ;
 125                 request_type |= USB_DIR_IN;
 126                 pipe = B2C2_USB_CTRL_PIPE_IN;
 127                 break;
 128         case B2C2_USB_WRITE_V8_MEM:
 129                 wIndex |= pbBuffer[0];
 130                 request_type |= USB_DIR_OUT;
 131                 nWaitTime = B2C2_WAIT_FOR_OPERATION_V8WRITE;
 132                 pipe = B2C2_USB_CTRL_PIPE_OUT;
 133                 break;
 134         case B2C2_USB_FLASH_BLOCK:
 135                 request_type |= USB_DIR_OUT;
 136                 nWaitTime = B2C2_WAIT_FOR_OPERATION_V8FLASH;
 137                 pipe = B2C2_USB_CTRL_PIPE_OUT;
 138                 break;
 139         default:
 140                 deb_info("unsupported request for v8_mem_req %x.\n", req);
 141                 return -EINVAL;
 142         }
 143         deb_v8("v8mem: %02x %02x %04x %04x, len: %d\n", request_type, req,
 144                         wAddress, wIndex, buflen);
 145
 146         mutex_lock(&fc_usb->data_mutex);
 147
 148         if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)
 149                 memcpy(fc_usb->data, pbBuffer, buflen);
 150
 151         ret = usb_control_msg(fc_usb->udev, pipe,
 152                         req,
 153                         request_type,
 154                         wAddress,
 155                         wIndex,
 156                         fc_usb->data,
 157                         buflen,
 158                         nWaitTime * HZ);
 159         if (ret != buflen)
 160                 ret = -EIO;
 161
 162         if (ret >= 0) {
 163                 ret = 0;
 164                 if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
 165                         memcpy(pbBuffer, fc_usb->data, buflen);
 166         }
 167
 168         mutex_unlock(&fc_usb->data_mutex);
 169
 170         debug_dump(pbBuffer, ret, deb_v8);
 171         return ret;
 172 }
 173
 174 #define bytes_left_to_read_on_page(paddr,buflen) \
 175         ((V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)) > buflen \
 176          ? buflen : (V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)))
 177
 178 static int flexcop_usb_memory_req(struct flexcop_usb *fc_usb,
 179                 flexcop_usb_request_t req, flexcop_usb_mem_page_t page_start,
 180                 u32 addr, int extended, u8 *buf, u32 len)
 181 {
 182         int i,ret = 0;
 183         u16 wMax;
 184         u32 pagechunk = 0;
 185
 186         switch(req) {
 187         case B2C2_USB_READ_V8_MEM:
 188                 wMax = USB_MEM_READ_MAX;
 189                 break;
 190         case B2C2_USB_WRITE_V8_MEM:
 191                 wMax = USB_MEM_WRITE_MAX;
 192                 break;
 193         case B2C2_USB_FLASH_BLOCK:
 194                 wMax = USB_FLASH_MAX;
 195                 break;
 196         default:
 197                 return -EINVAL;
 198                 break;
 199         }
 200         for (i = 0; i < len;) {
 201                 pagechunk =
 202                         wMax < bytes_left_to_read_on_page(addr, len) ?
 203                                 wMax :
 204                                 bytes_left_to_read_on_page(addr, len);
 205                 deb_info("%x\n",
 206                         (addr & V8_MEMORY_PAGE_MASK) |
 207                                 (V8_MEMORY_EXTENDED*extended));
 208
 209                 ret = flexcop_usb_v8_memory_req(fc_usb, req,
 210                         page_start + (addr / V8_MEMORY_PAGE_SIZE),
 211                         (addr & V8_MEMORY_PAGE_MASK) |
 212                                 (V8_MEMORY_EXTENDED*extended),
 213                         &buf[i], pagechunk);
 214
 215                 if (ret < 0)
 216                         return ret;
 217                 addr += pagechunk;
 218                 len -= pagechunk;
 219         }
 220         return 0;
 221 }
 222
 223 static int flexcop_usb_get_mac_addr(struct flexcop_device *fc, int extended)
 224 {
 225         return flexcop_usb_memory_req(fc->bus_specific, B2C2_USB_READ_V8_MEM,
 226                 V8_MEMORY_PAGE_FLASH, 0x1f010, 1,
 227                 fc->dvb_adapter.proposed_mac, 6);
 228 }
 229
 230 /* usb i2c stuff */
 231 static int flexcop_usb_i2c_req(struct flexcop_i2c_adapter *i2c,
 232                 flexcop_usb_request_t req, flexcop_usb_i2c_function_t func,
 233                 u8 chipaddr, u8 addr, u8 *buf, u8 buflen)
 234 {
 235         struct flexcop_usb *fc_usb = i2c->fc->bus_specific;
 236         u16 wValue, wIndex;
 237         int nWaitTime, pipe, ret;
 238         u8 request_type = USB_TYPE_VENDOR;
 239
 240         if (buflen > sizeof(fc_usb->data)) {
 241                 err("Buffer size bigger than max URB control message\n");
 242                 return -EIO;
 243         }
 244
 245         switch (func) {
 246         case USB_FUNC_I2C_WRITE:
 247         case USB_FUNC_I2C_MULTIWRITE:
 248         case USB_FUNC_I2C_REPEATWRITE:
 249                 /* DKT 020208 - add this to support special case of DiSEqC */
 250         case USB_FUNC_I2C_CHECKWRITE:
 251                 pipe = B2C2_USB_CTRL_PIPE_OUT;
 252                 nWaitTime = 2;
 253                 request_type |= USB_DIR_OUT;
 254                 break;
 255         case USB_FUNC_I2C_READ:
 256         case USB_FUNC_I2C_REPEATREAD:
 257                 pipe = B2C2_USB_CTRL_PIPE_IN;
 258                 nWaitTime = 2;
 259                 request_type |= USB_DIR_IN;
 260                 break;
 261         default:
 262                 deb_info("unsupported function for i2c_req %x\n", func);
 263                 return -EINVAL;
 264         }
 265         wValue = (func << 8) | (i2c->port << 4);
 266         wIndex = (chipaddr << 8 ) | addr;
 267
 268         deb_i2c("i2c %2d: %02x %02x %02x %02x %02x %02x\n",
 269                         func, request_type, req,
 270                         wValue & 0xff, wValue >> 8,
 271                         wIndex & 0xff, wIndex >> 8);
 272
 273         mutex_lock(&fc_usb->data_mutex);
 274
 275         if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)
 276                 memcpy(fc_usb->data, buf, buflen);
 277
 278         ret = usb_control_msg(fc_usb->udev, pipe,
 279                         req,
 280                         request_type,
 281                         wValue,
 282                         wIndex,
 283                         fc_usb->data,
 284                         buflen,
 285                         nWaitTime * HZ);
 286
 287         if (ret != buflen)
 288                 ret = -EIO;
 289
 290         if (ret >= 0) {
 291                 ret = 0;
 292                 if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
 293                         memcpy(buf, fc_usb->data, buflen);
 294         }
 295
 296         mutex_unlock(&fc_usb->data_mutex);
 297
 298         return ret;
 299 }
 300
 301 /* actual bus specific access functions,
 302    make sure prototype are/will be equal to pci */
 303 static flexcop_ibi_value flexcop_usb_read_ibi_reg(struct flexcop_device *fc,
 304         flexcop_ibi_register reg)
 305 {
 306         flexcop_ibi_value val;
 307         val.raw = 0;
 308         flexcop_usb_readwrite_dw(fc, reg, &val.raw, 1);
 309         return val;
 310 }
 311
 312 static int flexcop_usb_write_ibi_reg(struct flexcop_device *fc,
 313                 flexcop_ibi_register reg, flexcop_ibi_value val)
 314 {
 315         return flexcop_usb_readwrite_dw(fc, reg, &val.raw, 0);
 316 }
 317
 318 static int flexcop_usb_i2c_request(struct flexcop_i2c_adapter *i2c,
 319                 flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)
 320 {
 321         if (op == FC_READ)
 322                 return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,
 323                                 USB_FUNC_I2C_READ, chipaddr, addr, buf, len);
 324         else
 325                 return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,
 326                                 USB_FUNC_I2C_WRITE, chipaddr, addr, buf, len);
 327 }
 328
 329 static void flexcop_usb_process_frame(struct flexcop_usb *fc_usb,
 330         u8 *buffer, int buffer_length)
 331 {
 332         u8 *b;
 333         int l;
 334
 335         deb_ts("tmp_buffer_length=%d, buffer_length=%d\n",
 336                 fc_usb->tmp_buffer_length, buffer_length);
 337
 338         if (fc_usb->tmp_buffer_length > 0) {
 339                 memcpy(fc_usb->tmp_buffer+fc_usb->tmp_buffer_length, buffer,
 340                                 buffer_length);
 341                 fc_usb->tmp_buffer_length += buffer_length;
 342                 b = fc_usb->tmp_buffer;
 343                 l = fc_usb->tmp_buffer_length;
 344         } else {
 345                 b=buffer;
 346                 l=buffer_length;
 347         }
 348
 349         while (l >= 190) {
 350                 if (*b == 0xff) {
 351                         switch (*(b+1) & 0x03) {
 352                         case 0x01: /* media packet */
 353                                 if (*(b+2) == 0x47)
 354                                         flexcop_pass_dmx_packets(
 355                                                         fc_usb->fc_dev, b+2, 1);
 356                                 else
 357                                         deb_ts("not ts packet %*ph\n", 4, b+2);
 358                                 b += 190;
 359                                 l -= 190;
 360                                 break;
 361                         default:
 362                                 deb_ts("wrong packet type\n");
 363                                 l = 0;
 364                                 break;
 365                         }
 366                 } else {
 367                         deb_ts("wrong header\n");
 368                         l = 0;
 369                 }
 370         }
 371
 372         if (l>0)
 373                 memcpy(fc_usb->tmp_buffer, b, l);
 374         fc_usb->tmp_buffer_length = l;
 375 }
 376
 377 static void flexcop_usb_urb_complete(struct urb *urb)
 378 {
 379         struct flexcop_usb *fc_usb = urb->context;
 380         int i;
 381
 382         if (urb->actual_length > 0)
 383                 deb_ts("urb completed, bufsize: %d actlen; %d\n",
 384                         urb->transfer_buffer_length, urb->actual_length);
 385
 386         for (i = 0; i < urb->number_of_packets; i++) {
 387                 if (urb->iso_frame_desc[i].status < 0) {
 388                         err("iso frame descriptor %d has an error: %d\n", i,
 389                                 urb->iso_frame_desc[i].status);
 390                 } else
 391                         if (urb->iso_frame_desc[i].actual_length > 0) {
 392                                 deb_ts("passed %d bytes to the demux\n",
 393                                         urb->iso_frame_desc[i].actual_length);
 394
 395                                 flexcop_usb_process_frame(fc_usb,
 396                                         urb->transfer_buffer +
 397                                                 urb->iso_frame_desc[i].offset,
 398                                         urb->iso_frame_desc[i].actual_length);
 399                         }
 400                 urb->iso_frame_desc[i].status = 0;
 401                 urb->iso_frame_desc[i].actual_length = 0;
 402         }
 403         usb_submit_urb(urb,GFP_ATOMIC);
 404 }
 405
 406 static int flexcop_usb_stream_control(struct flexcop_device *fc, int onoff)
 407 {
 408         /* submit/kill iso packets */
 409         return 0;
 410 }
 411
 412 static void flexcop_usb_transfer_exit(struct flexcop_usb *fc_usb)
 413 {
 414         int i;
 415         for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)
 416                 if (fc_usb->iso_urb[i] != NULL) {
 417                         deb_ts("unlinking/killing urb no. %d\n",i);
 418                         usb_kill_urb(fc_usb->iso_urb[i]);
 419                         usb_free_urb(fc_usb->iso_urb[i]);
 420                 }
 421
 422         usb_free_coherent(fc_usb->udev, fc_usb->buffer_size,
 423                           fc_usb->iso_buffer, fc_usb->dma_addr);
 424
 425 }
 426
 427 static int flexcop_usb_transfer_init(struct flexcop_usb *fc_usb)
 428 {
 429         u16 frame_size = le16_to_cpu(
 430                 fc_usb->uintf->cur_altsetting->endpoint[0].desc.wMaxPacketSize);
 431         int bufsize = B2C2_USB_NUM_ISO_URB * B2C2_USB_FRAMES_PER_ISO *
 432                 frame_size, i, j, ret;
 433         int buffer_offset = 0;
 434
 435         deb_ts("creating %d iso-urbs with %d frames each of %d bytes size = %d.\n",
 436                B2C2_USB_NUM_ISO_URB,
 437                         B2C2_USB_FRAMES_PER_ISO, frame_size, bufsize);
 438
 439         fc_usb->iso_buffer = usb_alloc_coherent(fc_usb->udev,
 440                         bufsize, GFP_KERNEL, &fc_usb->dma_addr);
 441         if (fc_usb->iso_buffer == NULL)
 442                 return -ENOMEM;
 443
 444         memset(fc_usb->iso_buffer, 0, bufsize);
 445         fc_usb->buffer_size = bufsize;
 446
 447         /* creating iso urbs */
 448         for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {
 449                 fc_usb->iso_urb[i] = usb_alloc_urb(B2C2_USB_FRAMES_PER_ISO,
 450                         GFP_ATOMIC);
 451                 if (fc_usb->iso_urb[i] == NULL) {
 452                         ret = -ENOMEM;
 453                         goto urb_error;
 454                 }
 455         }
 456
 457         /* initialising and submitting iso urbs */
 458         for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {
 459                 int frame_offset = 0;
 460                 struct urb *urb = fc_usb->iso_urb[i];
 461                 deb_ts("initializing and submitting urb no. %d (buf_offset: %d).\n",
 462                        i, buffer_offset);
 463
 464                 urb->dev = fc_usb->udev;
 465                 urb->context = fc_usb;
 466                 urb->complete = flexcop_usb_urb_complete;
 467                 urb->pipe = B2C2_USB_DATA_PIPE;
 468                 urb->transfer_flags = URB_ISO_ASAP;
 469                 urb->interval = 1;
 470                 urb->number_of_packets = B2C2_USB_FRAMES_PER_ISO;
 471                 urb->transfer_buffer_length = frame_size * B2C2_USB_FRAMES_PER_ISO;
 472                 urb->transfer_buffer = fc_usb->iso_buffer + buffer_offset;
 473
 474                 buffer_offset += frame_size * B2C2_USB_FRAMES_PER_ISO;
 475                 for (j = 0; j < B2C2_USB_FRAMES_PER_ISO; j++) {
 476                         deb_ts("urb no: %d, frame: %d, frame_offset: %d\n",
 477                                         i, j, frame_offset);
 478                         urb->iso_frame_desc[j].offset = frame_offset;
 479                         urb->iso_frame_desc[j].length = frame_size;
 480                         frame_offset += frame_size;
 481                 }
 482
 483                 if ((ret = usb_submit_urb(fc_usb->iso_urb[i],GFP_ATOMIC))) {
 484                         err("submitting urb %d failed with %d.", i, ret);
 485                         goto urb_error;
 486                 }
 487                 deb_ts("submitted urb no. %d.\n",i);
 488         }
 489
 490         /* SRAM */
 491         flexcop_sram_set_dest(fc_usb->fc_dev, FC_SRAM_DEST_MEDIA |
 492                         FC_SRAM_DEST_NET | FC_SRAM_DEST_CAO | FC_SRAM_DEST_CAI,
 493                         FC_SRAM_DEST_TARGET_WAN_USB);
 494         flexcop_wan_set_speed(fc_usb->fc_dev, FC_WAN_SPEED_8MBITS);
 495         flexcop_sram_ctrl(fc_usb->fc_dev, 1, 1, 1);
 496         return 0;
 497
 498 urb_error:
 499         flexcop_usb_transfer_exit(fc_usb);
 500         return ret;
 501 }
 502
 503 static int flexcop_usb_init(struct flexcop_usb *fc_usb)
 504 {
 505         /* use the alternate setting with the larges buffer */
 506         int ret = usb_set_interface(fc_usb->udev, 0, 1);
 507
 508         if (ret) {
 509                 err("set interface failed.");
 510                 return ret;
 511         }
 512
 513         if (fc_usb->uintf->cur_altsetting->desc.bNumEndpoints < 1)
 514                 return -ENODEV;
 515         if (!usb_endpoint_is_isoc_in(&fc_usb->uintf->cur_altsetting->endpoint[1].desc))
 516                 return -ENODEV;
 517
 518         switch (fc_usb->udev->speed) {
 519         case USB_SPEED_LOW:
 520                 err("cannot handle USB speed because it is too slow.");
 521                 return -ENODEV;
 522                 break;
 523         case USB_SPEED_FULL:
 524                 info("running at FULL speed.");
 525                 break;
 526         case USB_SPEED_HIGH:
 527                 info("running at HIGH speed.");
 528                 break;
 529         case USB_SPEED_UNKNOWN:
 530         default:
 531                 err("cannot handle USB speed because it is unknown.");
 532                 return -ENODEV;
 533         }
 534         usb_set_intfdata(fc_usb->uintf, fc_usb);
 535         return 0;
 536 }
 537
 538 static void flexcop_usb_exit(struct flexcop_usb *fc_usb)
 539 {
 540         usb_set_intfdata(fc_usb->uintf, NULL);
 541 }
 542
 543 static int flexcop_usb_probe(struct usb_interface *intf,
 544                 const struct usb_device_id *id)
 545 {
 546         struct usb_device *udev = interface_to_usbdev(intf);
 547         struct flexcop_usb *fc_usb = NULL;
 548         struct flexcop_device *fc = NULL;
 549         int ret;
 550
 551         if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) {
 552                 err("out of memory\n");
 553                 return -ENOMEM;
 554         }
 555
 556         /* general flexcop init */
 557         fc_usb = fc->bus_specific;
 558         fc_usb->fc_dev = fc;
 559         mutex_init(&fc_usb->data_mutex);
 560
 561         fc->read_ibi_reg  = flexcop_usb_read_ibi_reg;
 562         fc->write_ibi_reg = flexcop_usb_write_ibi_reg;
 563         fc->i2c_request = flexcop_usb_i2c_request;
 564         fc->get_mac_addr = flexcop_usb_get_mac_addr;
 565
 566         fc->stream_control = flexcop_usb_stream_control;
 567
 568         fc->pid_filtering = 1;
 569         fc->bus_type = FC_USB;
 570
 571         fc->dev = &udev->dev;
 572         fc->owner = THIS_MODULE;
 573
 574         /* bus specific part */
 575         fc_usb->udev = udev;
 576         fc_usb->uintf = intf;
 577         if ((ret = flexcop_usb_init(fc_usb)) != 0)
 578                 goto err_kfree;
 579
 580         /* init flexcop */
 581         if ((ret = flexcop_device_initialize(fc)) != 0)
 582                 goto err_usb_exit;
 583
 584         /* xfer init */
 585         if ((ret = flexcop_usb_transfer_init(fc_usb)) != 0)
 586                 goto err_fc_exit;
 587
 588         info("%s successfully initialized and connected.", DRIVER_NAME);
 589         return 0;
 590
 591 err_fc_exit:
 592         flexcop_device_exit(fc);
 593 err_usb_exit:
 594         flexcop_usb_exit(fc_usb);
 595 err_kfree:
 596         flexcop_device_kfree(fc);
 597         return ret;
 598 }
 599
 600 static void flexcop_usb_disconnect(struct usb_interface *intf)
 601 {
 602         struct flexcop_usb *fc_usb = usb_get_intfdata(intf);
 603         flexcop_usb_transfer_exit(fc_usb);
 604         flexcop_device_exit(fc_usb->fc_dev);
 605         flexcop_usb_exit(fc_usb);
 606         flexcop_device_kfree(fc_usb->fc_dev);
 607         info("%s successfully deinitialized and disconnected.", DRIVER_NAME);
 608 }
 609
 610 static const struct usb_device_id flexcop_usb_table[] = {
 611         { USB_DEVICE(0x0af7, 0x0101) },
 612         { }
 613 };
 614 MODULE_DEVICE_TABLE (usb, flexcop_usb_table);
 615
 616 /* usb specific object needed to register this driver with the usb subsystem */
 617 static struct usb_driver flexcop_usb_driver = {
 618         .name           = "b2c2_flexcop_usb",
 619         .probe          = flexcop_usb_probe,
 620         .disconnect = flexcop_usb_disconnect,
 621         .id_table       = flexcop_usb_table,
 622 };
 623
 624 module_usb_driver(flexcop_usb_driver);
 625
 626 MODULE_AUTHOR(DRIVER_AUTHOR);
 627 MODULE_DESCRIPTION(DRIVER_NAME);
 628 MODULE_LICENSE("GPL");