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 <[email protected]>"
  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...) no_printk(args)
  31 #define debug_dump(b, l, method) do { } while (0)
  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);
  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);
 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 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         }
 199         while (len) {
 200                 pagechunk = min(wMax, bytes_left_to_read_on_page(addr, len));
 201                 deb_info("%x\n",
 202                         (addr & V8_MEMORY_PAGE_MASK) |
 203                                 (V8_MEMORY_EXTENDED*extended));
 204
 205                 ret = flexcop_usb_v8_memory_req(fc_usb, req,
 206                         page_start + (addr / V8_MEMORY_PAGE_SIZE),
 207                         (addr & V8_MEMORY_PAGE_MASK) |
 208                                 (V8_MEMORY_EXTENDED*extended),
 209                         buf, pagechunk);
 210
 211                 if (ret < 0)
 212                         return ret;
 213                 addr += pagechunk;
 214                 buf += pagechunk;
 215                 len -= pagechunk;
 216         }
 217         return 0;
 218 }
 219
 220 static int flexcop_usb_get_mac_addr(struct flexcop_device *fc, int extended)
 221 {
 222         return flexcop_usb_memory_req(fc->bus_specific, B2C2_USB_READ_V8_MEM,
 223                 V8_MEMORY_PAGE_FLASH, 0x1f010, 1,
 224                 fc->dvb_adapter.proposed_mac, 6);
 225 }
 226
 227 /* usb i2c stuff */
 228 static int flexcop_usb_i2c_req(struct flexcop_i2c_adapter *i2c,
 229                 flexcop_usb_request_t req, flexcop_usb_i2c_function_t func,
 230                 u8 chipaddr, u8 addr, u8 *buf, u8 buflen)
 231 {
 232         struct flexcop_usb *fc_usb = i2c->fc->bus_specific;
 233         u16 wValue, wIndex;
 234         int nWaitTime, pipe, ret;
 235         u8 request_type = USB_TYPE_VENDOR;
 236
 237         if (buflen > sizeof(fc_usb->data)) {
 238                 err("Buffer size bigger than max URB control message\n");
 239                 return -EIO;
 240         }
 241
 242         switch (func) {
 243         case USB_FUNC_I2C_WRITE:
 244         case USB_FUNC_I2C_MULTIWRITE:
 245         case USB_FUNC_I2C_REPEATWRITE:
 246                 /* DKT 020208 - add this to support special case of DiSEqC */
 247         case USB_FUNC_I2C_CHECKWRITE:
 248                 pipe = B2C2_USB_CTRL_PIPE_OUT;
 249                 nWaitTime = 2000;
 250                 request_type |= USB_DIR_OUT;
 251                 break;
 252         case USB_FUNC_I2C_READ:
 253         case USB_FUNC_I2C_REPEATREAD:
 254                 pipe = B2C2_USB_CTRL_PIPE_IN;
 255                 nWaitTime = 2000;
 256                 request_type |= USB_DIR_IN;
 257                 break;
 258         default:
 259                 deb_info("unsupported function for i2c_req %x\n", func);
 260                 return -EINVAL;
 261         }
 262         wValue = (func << 8) | (i2c->port << 4);
 263         wIndex = (chipaddr << 8 ) | addr;
 264
 265         deb_i2c("i2c %2d: %02x %02x %02x %02x %02x %02x\n",
 266                         func, request_type, req,
 267                         wValue & 0xff, wValue >> 8,
 268                         wIndex & 0xff, wIndex >> 8);
 269
 270         mutex_lock(&fc_usb->data_mutex);
 271
 272         if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)
 273                 memcpy(fc_usb->data, buf, buflen);
 274
 275         ret = usb_control_msg(fc_usb->udev, pipe,
 276                         req,
 277                         request_type,
 278                         wValue,
 279                         wIndex,
 280                         fc_usb->data,
 281                         buflen,
 282                         nWaitTime);
 283
 284         if (ret != buflen)
 285                 ret = -EIO;
 286
 287         if (ret >= 0) {
 288                 ret = 0;
 289                 if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
 290                         memcpy(buf, fc_usb->data, buflen);
 291         }
 292
 293         mutex_unlock(&fc_usb->data_mutex);
 294
 295         return ret;
 296 }
 297
 298 /* actual bus specific access functions,
 299    make sure prototype are/will be equal to pci */
 300 static flexcop_ibi_value flexcop_usb_read_ibi_reg(struct flexcop_device *fc,
 301         flexcop_ibi_register reg)
 302 {
 303         flexcop_ibi_value val;
 304         val.raw = 0;
 305         flexcop_usb_readwrite_dw(fc, reg, &val.raw, 1);
 306         return val;
 307 }
 308
 309 static int flexcop_usb_write_ibi_reg(struct flexcop_device *fc,
 310                 flexcop_ibi_register reg, flexcop_ibi_value val)
 311 {
 312         return flexcop_usb_readwrite_dw(fc, reg, &val.raw, 0);
 313 }
 314
 315 static int flexcop_usb_i2c_request(struct flexcop_i2c_adapter *i2c,
 316                 flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)
 317 {
 318         if (op == FC_READ)
 319                 return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,
 320                                 USB_FUNC_I2C_READ, chipaddr, addr, buf, len);
 321         else
 322                 return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,
 323                                 USB_FUNC_I2C_WRITE, chipaddr, addr, buf, len);
 324 }
 325
 326 static void flexcop_usb_process_frame(struct flexcop_usb *fc_usb,
 327         u8 *buffer, int buffer_length)
 328 {
 329         u8 *b;
 330         int l;
 331
 332         deb_ts("tmp_buffer_length=%d, buffer_length=%d\n",
 333                 fc_usb->tmp_buffer_length, buffer_length);
 334
 335         if (fc_usb->tmp_buffer_length > 0) {
 336                 memcpy(fc_usb->tmp_buffer+fc_usb->tmp_buffer_length, buffer,
 337                                 buffer_length);
 338                 fc_usb->tmp_buffer_length += buffer_length;
 339                 b = fc_usb->tmp_buffer;
 340                 l = fc_usb->tmp_buffer_length;
 341         } else {
 342                 b = buffer;
 343                 l = buffer_length;
 344         }
 345
 346         while (l >= 190) {
 347                 if (*b == 0xff) {
 348                         switch (*(b+1) & 0x03) {
 349                         case 0x01: /* media packet */
 350                                 if (*(b+2) == 0x47)
 351                                         flexcop_pass_dmx_packets(
 352                                                         fc_usb->fc_dev, b+2, 1);
 353                                 else
 354                                         deb_ts("not ts packet %*ph\n", 4, b+2);
 355                                 b += 190;
 356                                 l -= 190;
 357                                 break;
 358                         default:
 359                                 deb_ts("wrong packet type\n");
 360                                 l = 0;
 361                                 break;
 362                         }
 363                 } else {
 364                         deb_ts("wrong header\n");
 365                         l = 0;
 366                 }
 367         }
 368
 369         if (l > 0)
 370                 memcpy(fc_usb->tmp_buffer, b, l);
 371         fc_usb->tmp_buffer_length = l;
 372 }
 373
 374 static void flexcop_usb_urb_complete(struct urb *urb)
 375 {
 376         struct flexcop_usb *fc_usb = urb->context;
 377         int i;
 378
 379         if (urb->actual_length > 0)
 380                 deb_ts("urb completed, bufsize: %d actlen; %d\n",
 381                         urb->transfer_buffer_length, urb->actual_length);
 382
 383         for (i = 0; i < urb->number_of_packets; i++) {
 384                 if (urb->iso_frame_desc[i].status < 0) {
 385                         err("iso frame descriptor %d has an error: %d\n", i,
 386                                 urb->iso_frame_desc[i].status);
 387                 } else
 388                         if (urb->iso_frame_desc[i].actual_length > 0) {
 389                                 deb_ts("passed %d bytes to the demux\n",
 390                                         urb->iso_frame_desc[i].actual_length);
 391
 392                                 flexcop_usb_process_frame(fc_usb,
 393                                         urb->transfer_buffer +
 394                                                 urb->iso_frame_desc[i].offset,
 395                                         urb->iso_frame_desc[i].actual_length);
 396                         }
 397                 urb->iso_frame_desc[i].status = 0;
 398                 urb->iso_frame_desc[i].actual_length = 0;
 399         }
 400         usb_submit_urb(urb, GFP_ATOMIC);
 401 }
 402
 403 static int flexcop_usb_stream_control(struct flexcop_device *fc, int onoff)
 404 {
 405         /* submit/kill iso packets */
 406         return 0;
 407 }
 408
 409 static void flexcop_usb_transfer_exit(struct flexcop_usb *fc_usb)
 410 {
 411         int i;
 412         for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)
 413                 if (fc_usb->iso_urb[i] != NULL) {
 414                         deb_ts("unlinking/killing urb no. %d\n", i);
 415                         usb_kill_urb(fc_usb->iso_urb[i]);
 416                         usb_free_urb(fc_usb->iso_urb[i]);
 417                 }
 418
 419         usb_free_coherent(fc_usb->udev, fc_usb->buffer_size,
 420                           fc_usb->iso_buffer, fc_usb->dma_addr);
 421
 422 }
 423
 424 static int flexcop_usb_transfer_init(struct flexcop_usb *fc_usb)
 425 {
 426         struct usb_host_interface *alt = fc_usb->uintf->cur_altsetting;
 427         u16 frame_size;
 428         int bufsize, i, j, ret;
 429         int buffer_offset = 0;
 430
 431         frame_size = usb_endpoint_maxp(&alt->endpoint[0].desc);
 432         bufsize = B2C2_USB_NUM_ISO_URB * B2C2_USB_FRAMES_PER_ISO * frame_size;
 433
 434         deb_ts("creating %d iso-urbs with %d frames each of %d bytes size = %d.\n",
 435                B2C2_USB_NUM_ISO_URB,
 436                         B2C2_USB_FRAMES_PER_ISO, frame_size, bufsize);
 437
 438         fc_usb->iso_buffer = usb_alloc_coherent(fc_usb->udev,
 439                         bufsize, GFP_KERNEL, &fc_usb->dma_addr);
 440         if (fc_usb->iso_buffer == NULL)
 441                 return -ENOMEM;
 442
 443         memset(fc_usb->iso_buffer, 0, bufsize);
 444         fc_usb->buffer_size = bufsize;
 445
 446         /* creating iso urbs */
 447         for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {
 448                 fc_usb->iso_urb[i] = usb_alloc_urb(B2C2_USB_FRAMES_PER_ISO,
 449                         GFP_KERNEL);
 450                 if (fc_usb->iso_urb[i] == NULL) {
 451                         ret = -ENOMEM;
 452                         goto urb_error;
 453                 }
 454         }
 455
 456         /* initialising and submitting iso urbs */
 457         for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {
 458                 int frame_offset = 0;
 459                 struct urb *urb = fc_usb->iso_urb[i];
 460                 deb_ts("initializing and submitting urb no. %d (buf_offset: %d).\n",
 461                        i, buffer_offset);
 462
 463                 urb->dev = fc_usb->udev;
 464                 urb->context = fc_usb;
 465                 urb->complete = flexcop_usb_urb_complete;
 466                 urb->pipe = B2C2_USB_DATA_PIPE;
 467                 urb->transfer_flags = URB_ISO_ASAP;
 468                 urb->interval = 1;
 469                 urb->number_of_packets = B2C2_USB_FRAMES_PER_ISO;
 470                 urb->transfer_buffer_length = frame_size * B2C2_USB_FRAMES_PER_ISO;
 471                 urb->transfer_buffer = fc_usb->iso_buffer + buffer_offset;
 472
 473                 buffer_offset += frame_size * B2C2_USB_FRAMES_PER_ISO;
 474                 for (j = 0; j < B2C2_USB_FRAMES_PER_ISO; j++) {
 475                         deb_ts("urb no: %d, frame: %d, frame_offset: %d\n",
 476                                         i, j, frame_offset);
 477                         urb->iso_frame_desc[j].offset = frame_offset;
 478                         urb->iso_frame_desc[j].length = frame_size;
 479                         frame_offset += frame_size;
 480                 }
 481
 482                 if ((ret = usb_submit_urb(fc_usb->iso_urb[i],GFP_KERNEL))) {
 483                         err("submitting urb %d failed with %d.", i, ret);
 484                         goto urb_error;
 485                 }
 486                 deb_ts("submitted urb no. %d.\n", i);
 487         }
 488
 489         /* SRAM */
 490         flexcop_sram_set_dest(fc_usb->fc_dev, FC_SRAM_DEST_MEDIA |
 491                         FC_SRAM_DEST_NET | FC_SRAM_DEST_CAO | FC_SRAM_DEST_CAI,
 492                         FC_SRAM_DEST_TARGET_WAN_USB);
 493         flexcop_wan_set_speed(fc_usb->fc_dev, FC_WAN_SPEED_8MBITS);
 494         flexcop_sram_ctrl(fc_usb->fc_dev, 1, 1, 1);
 495         return 0;
 496
 497 urb_error:
 498         flexcop_usb_transfer_exit(fc_usb);
 499         return ret;
 500 }
 501
 502 static int flexcop_usb_init(struct flexcop_usb *fc_usb)
 503 {
 504         struct usb_host_interface *alt;
 505         int ret;
 506
 507         /* use the alternate setting with the largest buffer */
 508         ret = usb_set_interface(fc_usb->udev, 0, 1);
 509         if (ret) {
 510                 err("set interface failed.");
 511                 return ret;
 512         }
 513
 514         alt = fc_usb->uintf->cur_altsetting;
 515
 516         if (alt->desc.bNumEndpoints < 2)
 517                 return -ENODEV;
 518         if (!usb_endpoint_is_isoc_in(&alt->endpoint[0].desc))
 519                 return -ENODEV;
 520
 521         switch (fc_usb->udev->speed) {
 522         case USB_SPEED_LOW:
 523                 err("cannot handle USB speed because it is too slow.");
 524                 return -ENODEV;
 525                 break;
 526         case USB_SPEED_FULL:
 527                 info("running at FULL speed.");
 528                 break;
 529         case USB_SPEED_HIGH:
 530                 info("running at HIGH speed.");
 531                 break;
 532         case USB_SPEED_SUPER:
 533                 info("running at SUPER speed.");
 534                 break;
 535         case USB_SPEED_SUPER_PLUS:
 536                 info("running at SUPER+ speed.");
 537                 break;
 538         case USB_SPEED_UNKNOWN:
 539         default:
 540                 err("cannot handle USB speed because it is unknown.");
 541                 return -ENODEV;
 542         }
 543         usb_set_intfdata(fc_usb->uintf, fc_usb);
 544         return 0;
 545 }
 546
 547 static void flexcop_usb_exit(struct flexcop_usb *fc_usb)
 548 {
 549         usb_set_intfdata(fc_usb->uintf, NULL);
 550 }
 551
 552 static int flexcop_usb_probe(struct usb_interface *intf,
 553                 const struct usb_device_id *id)
 554 {
 555         struct usb_device *udev = interface_to_usbdev(intf);
 556         struct flexcop_usb *fc_usb = NULL;
 557         struct flexcop_device *fc = NULL;
 558         int ret;
 559
 560         if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) {
 561                 err("out of memory\n");
 562                 return -ENOMEM;
 563         }
 564
 565         /* general flexcop init */
 566         fc_usb = fc->bus_specific;
 567         fc_usb->fc_dev = fc;
 568         mutex_init(&fc_usb->data_mutex);
 569
 570         fc->read_ibi_reg  = flexcop_usb_read_ibi_reg;
 571         fc->write_ibi_reg = flexcop_usb_write_ibi_reg;
 572         fc->i2c_request = flexcop_usb_i2c_request;
 573         fc->get_mac_addr = flexcop_usb_get_mac_addr;
 574
 575         fc->stream_control = flexcop_usb_stream_control;
 576
 577         fc->pid_filtering = 1;
 578         fc->bus_type = FC_USB;
 579
 580         fc->dev = &udev->dev;
 581         fc->owner = THIS_MODULE;
 582
 583         /* bus specific part */
 584         fc_usb->udev = udev;
 585         fc_usb->uintf = intf;
 586         if ((ret = flexcop_usb_init(fc_usb)) != 0)
 587                 goto err_kfree;
 588
 589         /* init flexcop */
 590         if ((ret = flexcop_device_initialize(fc)) != 0)
 591                 goto err_usb_exit;
 592
 593         /* xfer init */
 594         if ((ret = flexcop_usb_transfer_init(fc_usb)) != 0)
 595                 goto err_fc_exit;
 596
 597         info("%s successfully initialized and connected.", DRIVER_NAME);
 598         return 0;
 599
 600 err_fc_exit:
 601         flexcop_device_exit(fc);
 602 err_usb_exit:
 603         flexcop_usb_exit(fc_usb);
 604 err_kfree:
 605         flexcop_device_kfree(fc);
 606         return ret;
 607 }
 608
 609 static void flexcop_usb_disconnect(struct usb_interface *intf)
 610 {
 611         struct flexcop_usb *fc_usb = usb_get_intfdata(intf);
 612         flexcop_usb_transfer_exit(fc_usb);
 613         flexcop_device_exit(fc_usb->fc_dev);
 614         flexcop_usb_exit(fc_usb);
 615         flexcop_device_kfree(fc_usb->fc_dev);
 616         info("%s successfully deinitialized and disconnected.", DRIVER_NAME);
 617 }
 618
 619 static const struct usb_device_id flexcop_usb_table[] = {
 620         { USB_DEVICE(0x0af7, 0x0101) },
 621         { }
 622 };
 623 MODULE_DEVICE_TABLE (usb, flexcop_usb_table);
 624
 625 /* usb specific object needed to register this driver with the usb subsystem */
 626 static struct usb_driver flexcop_usb_driver = {
 627         .name           = "b2c2_flexcop_usb",
 628         .probe          = flexcop_usb_probe,
 629         .disconnect = flexcop_usb_disconnect,
 630         .id_table       = flexcop_usb_table,
 631 };
 632
 633 module_usb_driver(flexcop_usb_driver);
 634
 635 MODULE_AUTHOR(DRIVER_AUTHOR);
 636 MODULE_DESCRIPTION(DRIVER_NAME);
 637 MODULE_LICENSE("GPL");