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...) 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 * 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 	}
199 	for (i = 0; i < len;) {
200 		pagechunk =
201 			wMax < bytes_left_to_read_on_page(addr, len) ?
202 				wMax :
203 				bytes_left_to_read_on_page(addr, len);
204 		deb_info("%x\n",
205 			(addr & V8_MEMORY_PAGE_MASK) |
206 				(V8_MEMORY_EXTENDED*extended));
207 
208 		ret = flexcop_usb_v8_memory_req(fc_usb, req,
209 			page_start + (addr / V8_MEMORY_PAGE_SIZE),
210 			(addr & V8_MEMORY_PAGE_MASK) |
211 				(V8_MEMORY_EXTENDED*extended),
212 			&buf[i], pagechunk);
213 
214 		if (ret < 0)
215 			return ret;
216 		addr += pagechunk;
217 		len -= pagechunk;
218 	}
219 	return 0;
220 }
221 
222 static int flexcop_usb_get_mac_addr(struct flexcop_device *fc, int extended)
223 {
224 	return flexcop_usb_memory_req(fc->bus_specific, B2C2_USB_READ_V8_MEM,
225 		V8_MEMORY_PAGE_FLASH, 0x1f010, 1,
226 		fc->dvb_adapter.proposed_mac, 6);
227 }
228 
229 /* usb i2c stuff */
230 static int flexcop_usb_i2c_req(struct flexcop_i2c_adapter *i2c,
231 		flexcop_usb_request_t req, flexcop_usb_i2c_function_t func,
232 		u8 chipaddr, u8 addr, u8 *buf, u8 buflen)
233 {
234 	struct flexcop_usb *fc_usb = i2c->fc->bus_specific;
235 	u16 wValue, wIndex;
236 	int nWaitTime, pipe, ret;
237 	u8 request_type = USB_TYPE_VENDOR;
238 
239 	if (buflen > sizeof(fc_usb->data)) {
240 		err("Buffer size bigger than max URB control message\n");
241 		return -EIO;
242 	}
243 
244 	switch (func) {
245 	case USB_FUNC_I2C_WRITE:
246 	case USB_FUNC_I2C_MULTIWRITE:
247 	case USB_FUNC_I2C_REPEATWRITE:
248 		/* DKT 020208 - add this to support special case of DiSEqC */
249 	case USB_FUNC_I2C_CHECKWRITE:
250 		pipe = B2C2_USB_CTRL_PIPE_OUT;
251 		nWaitTime = 2;
252 		request_type |= USB_DIR_OUT;
253 		break;
254 	case USB_FUNC_I2C_READ:
255 	case USB_FUNC_I2C_REPEATREAD:
256 		pipe = B2C2_USB_CTRL_PIPE_IN;
257 		nWaitTime = 2;
258 		request_type |= USB_DIR_IN;
259 		break;
260 	default:
261 		deb_info("unsupported function for i2c_req %x\n", func);
262 		return -EINVAL;
263 	}
264 	wValue = (func << 8) | (i2c->port << 4);
265 	wIndex = (chipaddr << 8 ) | addr;
266 
267 	deb_i2c("i2c %2d: %02x %02x %02x %02x %02x %02x\n",
268 			func, request_type, req,
269 			wValue & 0xff, wValue >> 8,
270 			wIndex & 0xff, wIndex >> 8);
271 
272 	mutex_lock(&fc_usb->data_mutex);
273 
274 	if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT)
275 		memcpy(fc_usb->data, buf, buflen);
276 
277 	ret = usb_control_msg(fc_usb->udev, pipe,
278 			req,
279 			request_type,
280 			wValue,
281 			wIndex,
282 			fc_usb->data,
283 			buflen,
284 			nWaitTime * HZ);
285 
286 	if (ret != buflen)
287 		ret = -EIO;
288 
289 	if (ret >= 0) {
290 		ret = 0;
291 		if ((request_type & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN)
292 			memcpy(buf, fc_usb->data, buflen);
293 	}
294 
295 	mutex_unlock(&fc_usb->data_mutex);
296 
297 	return ret;
298 }
299 
300 /* actual bus specific access functions,
301    make sure prototype are/will be equal to pci */
302 static flexcop_ibi_value flexcop_usb_read_ibi_reg(struct flexcop_device *fc,
303 	flexcop_ibi_register reg)
304 {
305 	flexcop_ibi_value val;
306 	val.raw = 0;
307 	flexcop_usb_readwrite_dw(fc, reg, &val.raw, 1);
308 	return val;
309 }
310 
311 static int flexcop_usb_write_ibi_reg(struct flexcop_device *fc,
312 		flexcop_ibi_register reg, flexcop_ibi_value val)
313 {
314 	return flexcop_usb_readwrite_dw(fc, reg, &val.raw, 0);
315 }
316 
317 static int flexcop_usb_i2c_request(struct flexcop_i2c_adapter *i2c,
318 		flexcop_access_op_t op, u8 chipaddr, u8 addr, u8 *buf, u16 len)
319 {
320 	if (op == FC_READ)
321 		return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,
322 				USB_FUNC_I2C_READ, chipaddr, addr, buf, len);
323 	else
324 		return flexcop_usb_i2c_req(i2c, B2C2_USB_I2C_REQUEST,
325 				USB_FUNC_I2C_WRITE, chipaddr, addr, buf, len);
326 }
327 
328 static void flexcop_usb_process_frame(struct flexcop_usb *fc_usb,
329 	u8 *buffer, int buffer_length)
330 {
331 	u8 *b;
332 	int l;
333 
334 	deb_ts("tmp_buffer_length=%d, buffer_length=%d\n",
335 		fc_usb->tmp_buffer_length, buffer_length);
336 
337 	if (fc_usb->tmp_buffer_length > 0) {
338 		memcpy(fc_usb->tmp_buffer+fc_usb->tmp_buffer_length, buffer,
339 				buffer_length);
340 		fc_usb->tmp_buffer_length += buffer_length;
341 		b = fc_usb->tmp_buffer;
342 		l = fc_usb->tmp_buffer_length;
343 	} else {
344 		b=buffer;
345 		l=buffer_length;
346 	}
347 
348 	while (l >= 190) {
349 		if (*b == 0xff) {
350 			switch (*(b+1) & 0x03) {
351 			case 0x01: /* media packet */
352 				if (*(b+2) == 0x47)
353 					flexcop_pass_dmx_packets(
354 							fc_usb->fc_dev, b+2, 1);
355 				else
356 					deb_ts("not ts packet %*ph\n", 4, b+2);
357 				b += 190;
358 				l -= 190;
359 				break;
360 			default:
361 				deb_ts("wrong packet type\n");
362 				l = 0;
363 				break;
364 			}
365 		} else {
366 			deb_ts("wrong header\n");
367 			l = 0;
368 		}
369 	}
370 
371 	if (l>0)
372 		memcpy(fc_usb->tmp_buffer, b, l);
373 	fc_usb->tmp_buffer_length = l;
374 }
375 
376 static void flexcop_usb_urb_complete(struct urb *urb)
377 {
378 	struct flexcop_usb *fc_usb = urb->context;
379 	int i;
380 
381 	if (urb->actual_length > 0)
382 		deb_ts("urb completed, bufsize: %d actlen; %d\n",
383 			urb->transfer_buffer_length, urb->actual_length);
384 
385 	for (i = 0; i < urb->number_of_packets; i++) {
386 		if (urb->iso_frame_desc[i].status < 0) {
387 			err("iso frame descriptor %d has an error: %d\n", i,
388 				urb->iso_frame_desc[i].status);
389 		} else
390 			if (urb->iso_frame_desc[i].actual_length > 0) {
391 				deb_ts("passed %d bytes to the demux\n",
392 					urb->iso_frame_desc[i].actual_length);
393 
394 				flexcop_usb_process_frame(fc_usb,
395 					urb->transfer_buffer +
396 						urb->iso_frame_desc[i].offset,
397 					urb->iso_frame_desc[i].actual_length);
398 			}
399 		urb->iso_frame_desc[i].status = 0;
400 		urb->iso_frame_desc[i].actual_length = 0;
401 	}
402 	usb_submit_urb(urb,GFP_ATOMIC);
403 }
404 
405 static int flexcop_usb_stream_control(struct flexcop_device *fc, int onoff)
406 {
407 	/* submit/kill iso packets */
408 	return 0;
409 }
410 
411 static void flexcop_usb_transfer_exit(struct flexcop_usb *fc_usb)
412 {
413 	int i;
414 	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)
415 		if (fc_usb->iso_urb[i] != NULL) {
416 			deb_ts("unlinking/killing urb no. %d\n",i);
417 			usb_kill_urb(fc_usb->iso_urb[i]);
418 			usb_free_urb(fc_usb->iso_urb[i]);
419 		}
420 
421 	usb_free_coherent(fc_usb->udev, fc_usb->buffer_size,
422 			  fc_usb->iso_buffer, fc_usb->dma_addr);
423 
424 }
425 
426 static int flexcop_usb_transfer_init(struct flexcop_usb *fc_usb)
427 {
428 	u16 frame_size = le16_to_cpu(
429 		fc_usb->uintf->cur_altsetting->endpoint[0].desc.wMaxPacketSize);
430 	int bufsize = B2C2_USB_NUM_ISO_URB * B2C2_USB_FRAMES_PER_ISO *
431 		frame_size, i, j, ret;
432 	int buffer_offset = 0;
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_ATOMIC);
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_ATOMIC))) {
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 	/* use the alternate setting with the larges buffer */
505 	int ret = usb_set_interface(fc_usb->udev, 0, 1);
506 
507 	if (ret) {
508 		err("set interface failed.");
509 		return ret;
510 	}
511 
512 	if (fc_usb->uintf->cur_altsetting->desc.bNumEndpoints < 1)
513 		return -ENODEV;
514 	if (!usb_endpoint_is_isoc_in(&fc_usb->uintf->cur_altsetting->endpoint[1].desc))
515 		return -ENODEV;
516 
517 	switch (fc_usb->udev->speed) {
518 	case USB_SPEED_LOW:
519 		err("cannot handle USB speed because it is too slow.");
520 		return -ENODEV;
521 		break;
522 	case USB_SPEED_FULL:
523 		info("running at FULL speed.");
524 		break;
525 	case USB_SPEED_HIGH:
526 		info("running at HIGH speed.");
527 		break;
528 	case USB_SPEED_UNKNOWN:
529 	default:
530 		err("cannot handle USB speed because it is unknown.");
531 		return -ENODEV;
532 	}
533 	usb_set_intfdata(fc_usb->uintf, fc_usb);
534 	return 0;
535 }
536 
537 static void flexcop_usb_exit(struct flexcop_usb *fc_usb)
538 {
539 	usb_set_intfdata(fc_usb->uintf, NULL);
540 }
541 
542 static int flexcop_usb_probe(struct usb_interface *intf,
543 		const struct usb_device_id *id)
544 {
545 	struct usb_device *udev = interface_to_usbdev(intf);
546 	struct flexcop_usb *fc_usb = NULL;
547 	struct flexcop_device *fc = NULL;
548 	int ret;
549 
550 	if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_usb))) == NULL) {
551 		err("out of memory\n");
552 		return -ENOMEM;
553 	}
554 
555 	/* general flexcop init */
556 	fc_usb = fc->bus_specific;
557 	fc_usb->fc_dev = fc;
558 	mutex_init(&fc_usb->data_mutex);
559 
560 	fc->read_ibi_reg  = flexcop_usb_read_ibi_reg;
561 	fc->write_ibi_reg = flexcop_usb_write_ibi_reg;
562 	fc->i2c_request = flexcop_usb_i2c_request;
563 	fc->get_mac_addr = flexcop_usb_get_mac_addr;
564 
565 	fc->stream_control = flexcop_usb_stream_control;
566 
567 	fc->pid_filtering = 1;
568 	fc->bus_type = FC_USB;
569 
570 	fc->dev = &udev->dev;
571 	fc->owner = THIS_MODULE;
572 
573 	/* bus specific part */
574 	fc_usb->udev = udev;
575 	fc_usb->uintf = intf;
576 	if ((ret = flexcop_usb_init(fc_usb)) != 0)
577 		goto err_kfree;
578 
579 	/* init flexcop */
580 	if ((ret = flexcop_device_initialize(fc)) != 0)
581 		goto err_usb_exit;
582 
583 	/* xfer init */
584 	if ((ret = flexcop_usb_transfer_init(fc_usb)) != 0)
585 		goto err_fc_exit;
586 
587 	info("%s successfully initialized and connected.", DRIVER_NAME);
588 	return 0;
589 
590 err_fc_exit:
591 	flexcop_device_exit(fc);
592 err_usb_exit:
593 	flexcop_usb_exit(fc_usb);
594 err_kfree:
595 	flexcop_device_kfree(fc);
596 	return ret;
597 }
598 
599 static void flexcop_usb_disconnect(struct usb_interface *intf)
600 {
601 	struct flexcop_usb *fc_usb = usb_get_intfdata(intf);
602 	flexcop_usb_transfer_exit(fc_usb);
603 	flexcop_device_exit(fc_usb->fc_dev);
604 	flexcop_usb_exit(fc_usb);
605 	flexcop_device_kfree(fc_usb->fc_dev);
606 	info("%s successfully deinitialized and disconnected.", DRIVER_NAME);
607 }
608 
609 static const struct usb_device_id flexcop_usb_table[] = {
610 	{ USB_DEVICE(0x0af7, 0x0101) },
611 	{ }
612 };
613 MODULE_DEVICE_TABLE (usb, flexcop_usb_table);
614 
615 /* usb specific object needed to register this driver with the usb subsystem */
616 static struct usb_driver flexcop_usb_driver = {
617 	.name		= "b2c2_flexcop_usb",
618 	.probe		= flexcop_usb_probe,
619 	.disconnect = flexcop_usb_disconnect,
620 	.id_table	= flexcop_usb_table,
621 };
622 
623 module_usb_driver(flexcop_usb_driver);
624 
625 MODULE_AUTHOR(DRIVER_AUTHOR);
626 MODULE_DESCRIPTION(DRIVER_NAME);
627 MODULE_LICENSE("GPL");
628