1 /* Linux driver for devices based on the DiBcom DiB0700 USB bridge
2  *
3  *	This program is free software; you can redistribute it and/or modify it
4  *	under the terms of the GNU General Public License as published by the Free
5  *	Software Foundation, version 2.
6  *
7  *  Copyright (C) 2005-6 DiBcom, SA
8  */
9 #include "dib0700.h"
10 
11 /* debug */
12 int dvb_usb_dib0700_debug;
13 module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
14 MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);
15 
16 static int nb_packet_buffer_size = 21;
17 module_param(nb_packet_buffer_size, int, 0644);
18 MODULE_PARM_DESC(nb_packet_buffer_size,
19 	"Set the dib0700 driver data buffer size. This parameter "
20 	"corresponds to the number of TS packets. The actual size of "
21 	"the data buffer corresponds to this parameter "
22 	"multiplied by 188 (default: 21)");
23 
24 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
25 
26 
27 int dib0700_get_version(struct dvb_usb_device *d, u32 *hwversion,
28 			u32 *romversion, u32 *ramversion, u32 *fwtype)
29 {
30 	struct dib0700_state *st = d->priv;
31 	int ret;
32 
33 	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
34 		err("could not acquire lock");
35 		return -EINTR;
36 	}
37 
38 	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
39 				  REQUEST_GET_VERSION,
40 				  USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
41 				  st->buf, 16, USB_CTRL_GET_TIMEOUT);
42 	if (hwversion != NULL)
43 		*hwversion  = (st->buf[0] << 24)  | (st->buf[1] << 16)  |
44 			(st->buf[2] << 8)  | st->buf[3];
45 	if (romversion != NULL)
46 		*romversion = (st->buf[4] << 24)  | (st->buf[5] << 16)  |
47 			(st->buf[6] << 8)  | st->buf[7];
48 	if (ramversion != NULL)
49 		*ramversion = (st->buf[8] << 24)  | (st->buf[9] << 16)  |
50 			(st->buf[10] << 8) | st->buf[11];
51 	if (fwtype != NULL)
52 		*fwtype     = (st->buf[12] << 24) | (st->buf[13] << 16) |
53 			(st->buf[14] << 8) | st->buf[15];
54 	mutex_unlock(&d->usb_mutex);
55 	return ret;
56 }
57 
58 /* expecting rx buffer: request data[0] data[1] ... data[2] */
59 static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
60 {
61 	int status;
62 
63 	deb_data(">>> ");
64 	debug_dump(tx, txlen, deb_data);
65 
66 	status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
67 		tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
68 		USB_CTRL_GET_TIMEOUT);
69 
70 	if (status != txlen)
71 		deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);
72 
73 	return status < 0 ? status : 0;
74 }
75 
76 /* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
77 int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
78 {
79 	u16 index, value;
80 	int status;
81 
82 	if (txlen < 2) {
83 		err("tx buffer length is smaller than 2. Makes no sense.");
84 		return -EINVAL;
85 	}
86 	if (txlen > 4) {
87 		err("tx buffer length is larger than 4. Not supported.");
88 		return -EINVAL;
89 	}
90 
91 	deb_data(">>> ");
92 	debug_dump(tx,txlen,deb_data);
93 
94 	value = ((txlen - 2) << 8) | tx[1];
95 	index = 0;
96 	if (txlen > 2)
97 		index |= (tx[2] << 8);
98 	if (txlen > 3)
99 		index |= tx[3];
100 
101 	status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
102 			USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
103 			USB_CTRL_GET_TIMEOUT);
104 
105 	if (status < 0)
106 		deb_info("ep 0 read error (status = %d)\n",status);
107 
108 	deb_data("<<< ");
109 	debug_dump(rx, rxlen, deb_data);
110 
111 	return status; /* length in case of success */
112 }
113 
114 int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
115 {
116 	struct dib0700_state *st = d->priv;
117 	int ret;
118 
119 	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
120 		err("could not acquire lock");
121 		return -EINTR;
122 	}
123 
124 	st->buf[0] = REQUEST_SET_GPIO;
125 	st->buf[1] = gpio;
126 	st->buf[2] = ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6);
127 
128 	ret = dib0700_ctrl_wr(d, st->buf, 3);
129 
130 	mutex_unlock(&d->usb_mutex);
131 	return ret;
132 }
133 
134 static int dib0700_set_usb_xfer_len(struct dvb_usb_device *d, u16 nb_ts_packets)
135 {
136 	struct dib0700_state *st = d->priv;
137 	int ret;
138 
139 	if (st->fw_version >= 0x10201) {
140 		if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
141 			err("could not acquire lock");
142 			return -EINTR;
143 		}
144 
145 		st->buf[0] = REQUEST_SET_USB_XFER_LEN;
146 		st->buf[1] = (nb_ts_packets >> 8) & 0xff;
147 		st->buf[2] = nb_ts_packets & 0xff;
148 
149 		deb_info("set the USB xfer len to %i Ts packet\n", nb_ts_packets);
150 
151 		ret = dib0700_ctrl_wr(d, st->buf, 3);
152 		mutex_unlock(&d->usb_mutex);
153 	} else {
154 		deb_info("this firmware does not allow to change the USB xfer len\n");
155 		ret = -EIO;
156 	}
157 
158 	return ret;
159 }
160 
161 /*
162  * I2C master xfer function (supported in 1.20 firmware)
163  */
164 static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
165 				int num)
166 {
167 	/* The new i2c firmware messages are more reliable and in particular
168 	   properly support i2c read calls not preceded by a write */
169 
170 	struct dvb_usb_device *d = i2c_get_adapdata(adap);
171 	struct dib0700_state *st = d->priv;
172 	uint8_t bus_mode = 1;  /* 0=eeprom bus, 1=frontend bus */
173 	uint8_t gen_mode = 0; /* 0=master i2c, 1=gpio i2c */
174 	uint8_t en_start = 0;
175 	uint8_t en_stop = 0;
176 	int result, i;
177 
178 	/* Ensure nobody else hits the i2c bus while we're sending our
179 	   sequence of messages, (such as the remote control thread) */
180 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
181 		return -EINTR;
182 
183 	for (i = 0; i < num; i++) {
184 		if (i == 0) {
185 			/* First message in the transaction */
186 			en_start = 1;
187 		} else if (!(msg[i].flags & I2C_M_NOSTART)) {
188 			/* Device supports repeated-start */
189 			en_start = 1;
190 		} else {
191 			/* Not the first packet and device doesn't support
192 			   repeated start */
193 			en_start = 0;
194 		}
195 		if (i == (num - 1)) {
196 			/* Last message in the transaction */
197 			en_stop = 1;
198 		}
199 
200 		if (msg[i].flags & I2C_M_RD) {
201 			/* Read request */
202 			u16 index, value;
203 			uint8_t i2c_dest;
204 
205 			i2c_dest = (msg[i].addr << 1);
206 			value = ((en_start << 7) | (en_stop << 6) |
207 				 (msg[i].len & 0x3F)) << 8 | i2c_dest;
208 			/* I2C ctrl + FE bus; */
209 			index = ((gen_mode << 6) & 0xC0) |
210 				((bus_mode << 4) & 0x30);
211 
212 			result = usb_control_msg(d->udev,
213 						 usb_rcvctrlpipe(d->udev, 0),
214 						 REQUEST_NEW_I2C_READ,
215 						 USB_TYPE_VENDOR | USB_DIR_IN,
216 						 value, index, msg[i].buf,
217 						 msg[i].len,
218 						 USB_CTRL_GET_TIMEOUT);
219 			if (result < 0) {
220 				deb_info("i2c read error (status = %d)\n", result);
221 				break;
222 			}
223 
224 			deb_data("<<< ");
225 			debug_dump(msg[i].buf, msg[i].len, deb_data);
226 
227 		} else {
228 			/* Write request */
229 			if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
230 				err("could not acquire lock");
231 				mutex_unlock(&d->i2c_mutex);
232 				return -EINTR;
233 			}
234 			st->buf[0] = REQUEST_NEW_I2C_WRITE;
235 			st->buf[1] = msg[i].addr << 1;
236 			st->buf[2] = (en_start << 7) | (en_stop << 6) |
237 				(msg[i].len & 0x3F);
238 			/* I2C ctrl + FE bus; */
239 			st->buf[3] = ((gen_mode << 6) & 0xC0) |
240 				 ((bus_mode << 4) & 0x30);
241 			/* The Actual i2c payload */
242 			memcpy(&st->buf[4], msg[i].buf, msg[i].len);
243 
244 			deb_data(">>> ");
245 			debug_dump(st->buf, msg[i].len + 4, deb_data);
246 
247 			result = usb_control_msg(d->udev,
248 						 usb_sndctrlpipe(d->udev, 0),
249 						 REQUEST_NEW_I2C_WRITE,
250 						 USB_TYPE_VENDOR | USB_DIR_OUT,
251 						 0, 0, st->buf, msg[i].len + 4,
252 						 USB_CTRL_GET_TIMEOUT);
253 			mutex_unlock(&d->usb_mutex);
254 			if (result < 0) {
255 				deb_info("i2c write error (status = %d)\n", result);
256 				break;
257 			}
258 		}
259 	}
260 	mutex_unlock(&d->i2c_mutex);
261 	return i;
262 }
263 
264 /*
265  * I2C master xfer function (pre-1.20 firmware)
266  */
267 static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
268 				   struct i2c_msg *msg, int num)
269 {
270 	struct dvb_usb_device *d = i2c_get_adapdata(adap);
271 	struct dib0700_state *st = d->priv;
272 	int i,len;
273 
274 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
275 		return -EINTR;
276 	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
277 		err("could not acquire lock");
278 		mutex_unlock(&d->i2c_mutex);
279 		return -EINTR;
280 	}
281 
282 	for (i = 0; i < num; i++) {
283 		/* fill in the address */
284 		st->buf[1] = msg[i].addr << 1;
285 		/* fill the buffer */
286 		memcpy(&st->buf[2], msg[i].buf, msg[i].len);
287 
288 		/* write/read request */
289 		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
290 			st->buf[0] = REQUEST_I2C_READ;
291 			st->buf[1] |= 1;
292 
293 			/* special thing in the current firmware: when length is zero the read-failed */
294 			len = dib0700_ctrl_rd(d, st->buf, msg[i].len + 2,
295 					msg[i+1].buf, msg[i+1].len);
296 			if (len <= 0) {
297 				deb_info("I2C read failed on address 0x%02x\n",
298 						msg[i].addr);
299 				break;
300 			}
301 
302 			msg[i+1].len = len;
303 
304 			i++;
305 		} else {
306 			st->buf[0] = REQUEST_I2C_WRITE;
307 			if (dib0700_ctrl_wr(d, st->buf, msg[i].len + 2) < 0)
308 				break;
309 		}
310 	}
311 	mutex_unlock(&d->usb_mutex);
312 	mutex_unlock(&d->i2c_mutex);
313 
314 	return i;
315 }
316 
317 static int dib0700_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
318 			    int num)
319 {
320 	struct dvb_usb_device *d = i2c_get_adapdata(adap);
321 	struct dib0700_state *st = d->priv;
322 
323 	if (st->fw_use_new_i2c_api == 1) {
324 		/* User running at least fw 1.20 */
325 		return dib0700_i2c_xfer_new(adap, msg, num);
326 	} else {
327 		/* Use legacy calls */
328 		return dib0700_i2c_xfer_legacy(adap, msg, num);
329 	}
330 }
331 
332 static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
333 {
334 	return I2C_FUNC_I2C;
335 }
336 
337 struct i2c_algorithm dib0700_i2c_algo = {
338 	.master_xfer   = dib0700_i2c_xfer,
339 	.functionality = dib0700_i2c_func,
340 };
341 
342 int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
343 			struct dvb_usb_device_description **desc, int *cold)
344 {
345 	s16 ret;
346 	u8 *b;
347 
348 	b = kmalloc(16, GFP_KERNEL);
349 	if (!b)
350 		return	-ENOMEM;
351 
352 
353 	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
354 		REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, b, 16, USB_CTRL_GET_TIMEOUT);
355 
356 	deb_info("FW GET_VERSION length: %d\n",ret);
357 
358 	*cold = ret <= 0;
359 	deb_info("cold: %d\n", *cold);
360 
361 	kfree(b);
362 	return 0;
363 }
364 
365 static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
366 	u8 pll_src, u8 pll_range, u8 clock_gpio3, u16 pll_prediv,
367 	u16 pll_loopdiv, u16 free_div, u16 dsuScaler)
368 {
369 	struct dib0700_state *st = d->priv;
370 	int ret;
371 
372 	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
373 		err("could not acquire lock");
374 		return -EINTR;
375 	}
376 
377 	st->buf[0] = REQUEST_SET_CLOCK;
378 	st->buf[1] = (en_pll << 7) | (pll_src << 6) |
379 		(pll_range << 5) | (clock_gpio3 << 4);
380 	st->buf[2] = (pll_prediv >> 8)  & 0xff; /* MSB */
381 	st->buf[3] =  pll_prediv        & 0xff; /* LSB */
382 	st->buf[4] = (pll_loopdiv >> 8) & 0xff; /* MSB */
383 	st->buf[5] =  pll_loopdiv       & 0xff; /* LSB */
384 	st->buf[6] = (free_div >> 8)    & 0xff; /* MSB */
385 	st->buf[7] =  free_div          & 0xff; /* LSB */
386 	st->buf[8] = (dsuScaler >> 8)   & 0xff; /* MSB */
387 	st->buf[9] =  dsuScaler         & 0xff; /* LSB */
388 
389 	ret = dib0700_ctrl_wr(d, st->buf, 10);
390 	mutex_unlock(&d->usb_mutex);
391 
392 	return ret;
393 }
394 
395 int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz)
396 {
397 	struct dib0700_state *st = d->priv;
398 	u16 divider;
399 	int ret;
400 
401 	if (scl_kHz == 0)
402 		return -EINVAL;
403 
404 	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
405 		err("could not acquire lock");
406 		return -EINTR;
407 	}
408 
409 	st->buf[0] = REQUEST_SET_I2C_PARAM;
410 	divider = (u16) (30000 / scl_kHz);
411 	st->buf[1] = 0;
412 	st->buf[2] = (u8) (divider >> 8);
413 	st->buf[3] = (u8) (divider & 0xff);
414 	divider = (u16) (72000 / scl_kHz);
415 	st->buf[4] = (u8) (divider >> 8);
416 	st->buf[5] = (u8) (divider & 0xff);
417 	divider = (u16) (72000 / scl_kHz); /* clock: 72MHz */
418 	st->buf[6] = (u8) (divider >> 8);
419 	st->buf[7] = (u8) (divider & 0xff);
420 
421 	deb_info("setting I2C speed: %04x %04x %04x (%d kHz).",
422 		(st->buf[2] << 8) | (st->buf[3]), (st->buf[4] << 8) |
423 		st->buf[5], (st->buf[6] << 8) | st->buf[7], scl_kHz);
424 
425 	ret = dib0700_ctrl_wr(d, st->buf, 8);
426 	mutex_unlock(&d->usb_mutex);
427 
428 	return ret;
429 }
430 
431 
432 int dib0700_ctrl_clock(struct dvb_usb_device *d, u32 clk_MHz, u8 clock_out_gp3)
433 {
434 	switch (clk_MHz) {
435 		case 72: dib0700_set_clock(d, 1, 0, 1, clock_out_gp3, 2, 24, 0, 0x4c); break;
436 		default: return -EINVAL;
437 	}
438 	return 0;
439 }
440 
441 static int dib0700_jumpram(struct usb_device *udev, u32 address)
442 {
443 	int ret = 0, actlen;
444 	u8 *buf;
445 
446 	buf = kmalloc(8, GFP_KERNEL);
447 	if (!buf)
448 		return -ENOMEM;
449 	buf[0] = REQUEST_JUMPRAM;
450 	buf[1] = 0;
451 	buf[2] = 0;
452 	buf[3] = 0;
453 	buf[4] = (address >> 24) & 0xff;
454 	buf[5] = (address >> 16) & 0xff;
455 	buf[6] = (address >> 8)  & 0xff;
456 	buf[7] =  address        & 0xff;
457 
458 	if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
459 		deb_fw("jumpram to 0x%x failed\n",address);
460 		goto out;
461 	}
462 	if (actlen != 8) {
463 		deb_fw("jumpram to 0x%x failed\n",address);
464 		ret = -EIO;
465 		goto out;
466 	}
467 out:
468 	kfree(buf);
469 	return ret;
470 }
471 
472 int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
473 {
474 	struct hexline hx;
475 	int pos = 0, ret, act_len, i, adap_num;
476 	u8 *buf;
477 	u32 fw_version;
478 
479 	buf = kmalloc(260, GFP_KERNEL);
480 	if (!buf)
481 		return -ENOMEM;
482 
483 	while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
484 		deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",
485 				hx.addr, hx.len, hx.chk);
486 
487 		buf[0] = hx.len;
488 		buf[1] = (hx.addr >> 8) & 0xff;
489 		buf[2] =  hx.addr       & 0xff;
490 		buf[3] = hx.type;
491 		memcpy(&buf[4],hx.data,hx.len);
492 		buf[4+hx.len] = hx.chk;
493 
494 		ret = usb_bulk_msg(udev,
495 			usb_sndbulkpipe(udev, 0x01),
496 			buf,
497 			hx.len + 5,
498 			&act_len,
499 			1000);
500 
501 		if (ret < 0) {
502 			err("firmware download failed at %d with %d",pos,ret);
503 			goto out;
504 		}
505 	}
506 
507 	if (ret == 0) {
508 		/* start the firmware */
509 		if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
510 			info("firmware started successfully.");
511 			msleep(500);
512 		}
513 	} else
514 		ret = -EIO;
515 
516 	/* the number of ts packet has to be at least 1 */
517 	if (nb_packet_buffer_size < 1)
518 		nb_packet_buffer_size = 1;
519 
520 	/* get the fimware version */
521 	usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
522 				  REQUEST_GET_VERSION,
523 				  USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
524 				  buf, 16, USB_CTRL_GET_TIMEOUT);
525 	fw_version = (buf[8] << 24) | (buf[9] << 16) | (buf[10] << 8) | buf[11];
526 
527 	/* set the buffer size - DVB-USB is allocating URB buffers
528 	 * only after the firwmare download was successful */
529 	for (i = 0; i < dib0700_device_count; i++) {
530 		for (adap_num = 0; adap_num < dib0700_devices[i].num_adapters;
531 				adap_num++) {
532 			if (fw_version >= 0x10201) {
533 				dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = 188*nb_packet_buffer_size;
534 			} else {
535 				/* for fw version older than 1.20.1,
536 				 * the buffersize has to be n times 512 */
537 				dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = ((188*nb_packet_buffer_size+188/2)/512)*512;
538 				if (dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize < 512)
539 					dib0700_devices[i].adapter[adap_num].fe[0].stream.u.bulk.buffersize = 512;
540 			}
541 		}
542 	}
543 out:
544 	kfree(buf);
545 	return ret;
546 }
547 
548 int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
549 {
550 	struct dib0700_state *st = adap->dev->priv;
551 	int ret;
552 
553 	if ((onoff != 0) && (st->fw_version >= 0x10201)) {
554 		/* for firmware later than 1.20.1,
555 		 * the USB xfer length can be set  */
556 		ret = dib0700_set_usb_xfer_len(adap->dev,
557 			st->nb_packet_buffer_size);
558 		if (ret < 0) {
559 			deb_info("can not set the USB xfer len\n");
560 			return ret;
561 		}
562 	}
563 
564 	mutex_lock(&adap->dev->usb_mutex);
565 
566 	st->buf[0] = REQUEST_ENABLE_VIDEO;
567 	/* this bit gives a kind of command,
568 	 * rather than enabling something or not */
569 	st->buf[1] = (onoff << 4) | 0x00;
570 
571 	if (st->disable_streaming_master_mode == 1)
572 		st->buf[2] = 0x00;
573 	else
574 		st->buf[2] = 0x01 << 4; /* Master mode */
575 
576 	st->buf[3] = 0x00;
577 
578 	deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);
579 
580 	st->channel_state &= ~0x3;
581 	if ((adap->fe_adap[0].stream.props.endpoint != 2)
582 			&& (adap->fe_adap[0].stream.props.endpoint != 3)) {
583 		deb_info("the endpoint number (%i) is not correct, use the adapter id instead", adap->fe_adap[0].stream.props.endpoint);
584 		if (onoff)
585 			st->channel_state |=	1 << (adap->id);
586 		else
587 			st->channel_state |=	1 << ~(adap->id);
588 	} else {
589 		if (onoff)
590 			st->channel_state |=	1 << (adap->fe_adap[0].stream.props.endpoint-2);
591 		else
592 			st->channel_state |=	1 << (3-adap->fe_adap[0].stream.props.endpoint);
593 	}
594 
595 	st->buf[2] |= st->channel_state;
596 
597 	deb_info("data for streaming: %x %x\n", st->buf[1], st->buf[2]);
598 
599 	ret = dib0700_ctrl_wr(adap->dev, st->buf, 4);
600 	mutex_unlock(&adap->dev->usb_mutex);
601 
602 	return ret;
603 }
604 
605 int dib0700_change_protocol(struct rc_dev *rc, u64 *rc_type)
606 {
607 	struct dvb_usb_device *d = rc->priv;
608 	struct dib0700_state *st = d->priv;
609 	int new_proto, ret;
610 
611 	if (mutex_lock_interruptible(&d->usb_mutex) < 0) {
612 		err("could not acquire lock");
613 		return -EINTR;
614 	}
615 
616 	st->buf[0] = REQUEST_SET_RC;
617 	st->buf[1] = 0;
618 	st->buf[2] = 0;
619 
620 	/* Set the IR mode */
621 	if (*rc_type & RC_BIT_RC5) {
622 		new_proto = 1;
623 		*rc_type = RC_BIT_RC5;
624 	} else if (*rc_type & RC_BIT_NEC) {
625 		new_proto = 0;
626 		*rc_type = RC_BIT_NEC;
627 	} else if (*rc_type & RC_BIT_RC6_MCE) {
628 		if (st->fw_version < 0x10200) {
629 			ret = -EINVAL;
630 			goto out;
631 		}
632 		new_proto = 2;
633 		*rc_type = RC_BIT_RC6_MCE;
634 	} else {
635 		ret = -EINVAL;
636 		goto out;
637 	}
638 
639 	st->buf[1] = new_proto;
640 
641 	ret = dib0700_ctrl_wr(d, st->buf, 3);
642 	if (ret < 0) {
643 		err("ir protocol setup failed");
644 		goto out;
645 	}
646 
647 	d->props.rc.core.protocol = *rc_type;
648 
649 out:
650 	mutex_unlock(&d->usb_mutex);
651 	return ret;
652 }
653 
654 /* This is the structure of the RC response packet starting in firmware 1.20 */
655 struct dib0700_rc_response {
656 	u8 report_id;
657 	u8 data_state;
658 	u8 system;
659 	u8 not_system;
660 	u8 data;
661 	u8 not_data;
662 };
663 #define RC_MSG_SIZE_V1_20 6
664 
665 static void dib0700_rc_urb_completion(struct urb *purb)
666 {
667 	struct dvb_usb_device *d = purb->context;
668 	struct dib0700_rc_response *poll_reply;
669 	enum rc_type protocol;
670 	u32 uninitialized_var(keycode);
671 	u8 toggle;
672 
673 	deb_info("%s()\n", __func__);
674 	if (d->rc_dev == NULL) {
675 		/* This will occur if disable_rc_polling=1 */
676 		kfree(purb->transfer_buffer);
677 		usb_free_urb(purb);
678 		return;
679 	}
680 
681 	poll_reply = purb->transfer_buffer;
682 
683 	if (purb->status < 0) {
684 		deb_info("discontinuing polling\n");
685 		kfree(purb->transfer_buffer);
686 		usb_free_urb(purb);
687 		return;
688 	}
689 
690 	if (purb->actual_length != RC_MSG_SIZE_V1_20) {
691 		deb_info("malformed rc msg size=%d\n", purb->actual_length);
692 		goto resubmit;
693 	}
694 
695 	deb_data("IR ID = %02X state = %02X System = %02X %02X Cmd = %02X %02X (len %d)\n",
696 		 poll_reply->report_id, poll_reply->data_state,
697 		 poll_reply->system, poll_reply->not_system,
698 		 poll_reply->data, poll_reply->not_data,
699 		 purb->actual_length);
700 
701 	switch (d->props.rc.core.protocol) {
702 	case RC_BIT_NEC:
703 		protocol = RC_TYPE_NEC;
704 		toggle = 0;
705 
706 		/* NEC protocol sends repeat code as 0 0 0 FF */
707 		if (poll_reply->system     == 0x00 &&
708 		    poll_reply->not_system == 0x00 &&
709 		    poll_reply->data       == 0x00 &&
710 		    poll_reply->not_data   == 0xff) {
711 			poll_reply->data_state = 2;
712 			break;
713 		}
714 
715 		if ((poll_reply->data ^ poll_reply->not_data) != 0xff) {
716 			deb_data("NEC32 protocol\n");
717 			keycode = RC_SCANCODE_NEC32(poll_reply->system     << 24 |
718 						     poll_reply->not_system << 16 |
719 						     poll_reply->data       << 8  |
720 						     poll_reply->not_data);
721 		} else if ((poll_reply->system ^ poll_reply->not_system) != 0xff) {
722 			deb_data("NEC extended protocol\n");
723 			keycode = RC_SCANCODE_NECX(poll_reply->system << 8 |
724 						    poll_reply->not_system,
725 						    poll_reply->data);
726 
727 		} else {
728 			deb_data("NEC normal protocol\n");
729 			keycode = RC_SCANCODE_NEC(poll_reply->system,
730 						   poll_reply->data);
731 		}
732 
733 		break;
734 	default:
735 		deb_data("RC5 protocol\n");
736 		protocol = RC_TYPE_RC5;
737 		toggle = poll_reply->report_id;
738 		keycode = RC_SCANCODE_RC5(poll_reply->system, poll_reply->data);
739 
740 		break;
741 	}
742 
743 	if ((poll_reply->data + poll_reply->not_data) != 0xff) {
744 		/* Key failed integrity check */
745 		err("key failed integrity check: %02x %02x %02x %02x",
746 		    poll_reply->system,  poll_reply->not_system,
747 		    poll_reply->data, poll_reply->not_data);
748 		goto resubmit;
749 	}
750 
751 	rc_keydown(d->rc_dev, protocol, keycode, toggle);
752 
753 resubmit:
754 	/* Clean the buffer before we requeue */
755 	memset(purb->transfer_buffer, 0, RC_MSG_SIZE_V1_20);
756 
757 	/* Requeue URB */
758 	usb_submit_urb(purb, GFP_ATOMIC);
759 }
760 
761 int dib0700_rc_setup(struct dvb_usb_device *d, struct usb_interface *intf)
762 {
763 	struct dib0700_state *st = d->priv;
764 	struct urb *purb;
765 	const struct usb_endpoint_descriptor *e;
766 	int ret, rc_ep = 1;
767 	unsigned int pipe = 0;
768 
769 	/* Poll-based. Don't initialize bulk mode */
770 	if (st->fw_version < 0x10200 || !intf)
771 		return 0;
772 
773 	/* Starting in firmware 1.20, the RC info is provided on a bulk pipe */
774 
775 	purb = usb_alloc_urb(0, GFP_KERNEL);
776 	if (purb == NULL) {
777 		err("rc usb alloc urb failed");
778 		return -ENOMEM;
779 	}
780 
781 	purb->transfer_buffer = kzalloc(RC_MSG_SIZE_V1_20, GFP_KERNEL);
782 	if (purb->transfer_buffer == NULL) {
783 		err("rc kzalloc failed");
784 		usb_free_urb(purb);
785 		return -ENOMEM;
786 	}
787 
788 	purb->status = -EINPROGRESS;
789 
790 	/*
791 	 * Some devices like the Hauppauge NovaTD model 52009 use an interrupt
792 	 * endpoint, while others use a bulk one.
793 	 */
794 	e = &intf->altsetting[0].endpoint[rc_ep].desc;
795 	if (usb_endpoint_dir_in(e)) {
796 		if (usb_endpoint_xfer_bulk(e)) {
797 			pipe = usb_rcvbulkpipe(d->udev, rc_ep);
798 			usb_fill_bulk_urb(purb, d->udev, pipe,
799 					  purb->transfer_buffer,
800 					  RC_MSG_SIZE_V1_20,
801 					  dib0700_rc_urb_completion, d);
802 
803 		} else if (usb_endpoint_xfer_int(e)) {
804 			pipe = usb_rcvintpipe(d->udev, rc_ep);
805 			usb_fill_int_urb(purb, d->udev, pipe,
806 					  purb->transfer_buffer,
807 					  RC_MSG_SIZE_V1_20,
808 					  dib0700_rc_urb_completion, d, 1);
809 		}
810 	}
811 
812 	if (!pipe) {
813 		err("There's no endpoint for remote controller");
814 		kfree(purb->transfer_buffer);
815 		usb_free_urb(purb);
816 		return 0;
817 	}
818 
819 	ret = usb_submit_urb(purb, GFP_ATOMIC);
820 	if (ret) {
821 		err("rc submit urb failed");
822 		kfree(purb->transfer_buffer);
823 		usb_free_urb(purb);
824 	}
825 
826 	return ret;
827 }
828 
829 static int dib0700_probe(struct usb_interface *intf,
830 		const struct usb_device_id *id)
831 {
832 	int i;
833 	struct dvb_usb_device *dev;
834 
835 	for (i = 0; i < dib0700_device_count; i++)
836 		if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE,
837 		    &dev, adapter_nr) == 0) {
838 			struct dib0700_state *st = dev->priv;
839 			u32 hwversion, romversion, fw_version, fwtype;
840 
841 			dib0700_get_version(dev, &hwversion, &romversion,
842 				&fw_version, &fwtype);
843 
844 			deb_info("Firmware version: %x, %d, 0x%x, %d\n",
845 				hwversion, romversion, fw_version, fwtype);
846 
847 			st->fw_version = fw_version;
848 			st->nb_packet_buffer_size = (u32)nb_packet_buffer_size;
849 
850 			/* Disable polling mode on newer firmwares */
851 			if (st->fw_version >= 0x10200)
852 				dev->props.rc.core.bulk_mode = true;
853 			else
854 				dev->props.rc.core.bulk_mode = false;
855 
856 			dib0700_rc_setup(dev, intf);
857 
858 			return 0;
859 		}
860 
861 	return -ENODEV;
862 }
863 
864 static struct usb_driver dib0700_driver = {
865 	.name       = "dvb_usb_dib0700",
866 	.probe      = dib0700_probe,
867 	.disconnect = dvb_usb_device_exit,
868 	.id_table   = dib0700_usb_id_table,
869 };
870 
871 module_usb_driver(dib0700_driver);
872 
873 MODULE_FIRMWARE("dvb-usb-dib0700-1.20.fw");
874 MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
875 MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
876 MODULE_VERSION("1.0");
877 MODULE_LICENSE("GPL");
878