1 /*
2  *  tm6000-dvb.c - dvb-t support for TM5600/TM6000/TM6010 USB video capture devices
3  *
4  *  Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation version 2
9  *
10  *  This program is distributed in the hope that it will be useful,
11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  *  GNU General Public License for more details.
14  *
15  *  You should have received a copy of the GNU General Public License
16  *  along with this program; if not, write to the Free Software
17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18  */
19 
20 #include <linux/kernel.h>
21 #include <linux/slab.h>
22 #include <linux/usb.h>
23 
24 #include "tm6000.h"
25 #include "tm6000-regs.h"
26 
27 #include "zl10353.h"
28 
29 #include <media/tuner.h>
30 
31 #include "tuner-xc2028.h"
32 #include "xc5000.h"
33 
34 MODULE_DESCRIPTION("DVB driver extension module for tm5600/6000/6010 based TV cards");
35 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
36 MODULE_LICENSE("GPL");
37 
38 MODULE_SUPPORTED_DEVICE("{{Trident, tm5600},"
39 			"{{Trident, tm6000},"
40 			"{{Trident, tm6010}");
41 
42 static int debug;
43 
44 module_param(debug, int, 0644);
45 MODULE_PARM_DESC(debug, "enable debug message");
46 
print_err_status(struct tm6000_core * dev,int packet,int status)47 static inline void print_err_status(struct tm6000_core *dev,
48 				    int packet, int status)
49 {
50 	char *errmsg = "Unknown";
51 
52 	switch (status) {
53 	case -ENOENT:
54 		errmsg = "unlinked synchronuously";
55 		break;
56 	case -ECONNRESET:
57 		errmsg = "unlinked asynchronuously";
58 		break;
59 	case -ENOSR:
60 		errmsg = "Buffer error (overrun)";
61 		break;
62 	case -EPIPE:
63 		errmsg = "Stalled (device not responding)";
64 		break;
65 	case -EOVERFLOW:
66 		errmsg = "Babble (bad cable?)";
67 		break;
68 	case -EPROTO:
69 		errmsg = "Bit-stuff error (bad cable?)";
70 		break;
71 	case -EILSEQ:
72 		errmsg = "CRC/Timeout (could be anything)";
73 		break;
74 	case -ETIME:
75 		errmsg = "Device does not respond";
76 		break;
77 	}
78 	if (packet < 0) {
79 		dprintk(dev, 1, "URB status %d [%s].\n",
80 			status, errmsg);
81 	} else {
82 		dprintk(dev, 1, "URB packet %d, status %d [%s].\n",
83 			packet, status, errmsg);
84 	}
85 }
86 
tm6000_urb_received(struct urb * urb)87 static void tm6000_urb_received(struct urb *urb)
88 {
89 	int ret;
90 	struct tm6000_core *dev = urb->context;
91 
92 	switch (urb->status) {
93 	case 0:
94 	case -ETIMEDOUT:
95 		break;
96 	case -ENOENT:
97 	case -ECONNRESET:
98 	case -ESHUTDOWN:
99 		return;
100 	default:
101 		print_err_status(dev, 0, urb->status);
102 	}
103 
104 	if (urb->actual_length > 0)
105 		dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
106 						   urb->actual_length);
107 
108 	if (dev->dvb->streams > 0) {
109 		ret = usb_submit_urb(urb, GFP_ATOMIC);
110 		if (ret < 0) {
111 			printk(KERN_ERR "tm6000:  error %s\n", __func__);
112 			kfree(urb->transfer_buffer);
113 			usb_free_urb(urb);
114 		}
115 	}
116 }
117 
tm6000_start_stream(struct tm6000_core * dev)118 static int tm6000_start_stream(struct tm6000_core *dev)
119 {
120 	int ret;
121 	unsigned int pipe, size;
122 	struct tm6000_dvb *dvb = dev->dvb;
123 
124 	printk(KERN_INFO "tm6000: got start stream request %s\n", __func__);
125 
126 	if (dev->mode != TM6000_MODE_DIGITAL) {
127 		tm6000_init_digital_mode(dev);
128 		dev->mode = TM6000_MODE_DIGITAL;
129 	}
130 
131 	dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
132 	if (dvb->bulk_urb == NULL) {
133 		printk(KERN_ERR "tm6000: couldn't allocate urb\n");
134 		return -ENOMEM;
135 	}
136 
137 	pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
138 							  & USB_ENDPOINT_NUMBER_MASK);
139 
140 	size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
141 	size = size * 15; /* 512 x 8 or 12 or 15 */
142 
143 	dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
144 	if (dvb->bulk_urb->transfer_buffer == NULL) {
145 		usb_free_urb(dvb->bulk_urb);
146 		printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
147 		return -ENOMEM;
148 	}
149 
150 	usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
151 						 dvb->bulk_urb->transfer_buffer,
152 						 size,
153 						 tm6000_urb_received, dev);
154 
155 	ret = usb_clear_halt(dev->udev, pipe);
156 	if (ret < 0) {
157 		printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
158 							ret, __func__);
159 		return ret;
160 	} else
161 		printk(KERN_ERR "tm6000: pipe resetted\n");
162 
163 /*	mutex_lock(&tm6000_driver.open_close_mutex); */
164 	ret = usb_submit_urb(dvb->bulk_urb, GFP_ATOMIC);
165 
166 /*	mutex_unlock(&tm6000_driver.open_close_mutex); */
167 	if (ret) {
168 		printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
169 									ret);
170 
171 		kfree(dvb->bulk_urb->transfer_buffer);
172 		usb_free_urb(dvb->bulk_urb);
173 		return ret;
174 	}
175 
176 	return 0;
177 }
178 
tm6000_stop_stream(struct tm6000_core * dev)179 static void tm6000_stop_stream(struct tm6000_core *dev)
180 {
181 	struct tm6000_dvb *dvb = dev->dvb;
182 
183 	if (dvb->bulk_urb) {
184 		printk(KERN_INFO "urb killing\n");
185 		usb_kill_urb(dvb->bulk_urb);
186 		printk(KERN_INFO "urb buffer free\n");
187 		kfree(dvb->bulk_urb->transfer_buffer);
188 		usb_free_urb(dvb->bulk_urb);
189 		dvb->bulk_urb = NULL;
190 	}
191 }
192 
tm6000_start_feed(struct dvb_demux_feed * feed)193 static int tm6000_start_feed(struct dvb_demux_feed *feed)
194 {
195 	struct dvb_demux *demux = feed->demux;
196 	struct tm6000_core *dev = demux->priv;
197 	struct tm6000_dvb *dvb = dev->dvb;
198 	printk(KERN_INFO "tm6000: got start feed request %s\n", __func__);
199 
200 	mutex_lock(&dvb->mutex);
201 	if (dvb->streams == 0) {
202 		dvb->streams = 1;
203 /*		mutex_init(&tm6000_dev->streming_mutex); */
204 		tm6000_start_stream(dev);
205 	} else
206 		++(dvb->streams);
207 	mutex_unlock(&dvb->mutex);
208 
209 	return 0;
210 }
211 
tm6000_stop_feed(struct dvb_demux_feed * feed)212 static int tm6000_stop_feed(struct dvb_demux_feed *feed)
213 {
214 	struct dvb_demux *demux = feed->demux;
215 	struct tm6000_core *dev = demux->priv;
216 	struct tm6000_dvb *dvb = dev->dvb;
217 
218 	printk(KERN_INFO "tm6000: got stop feed request %s\n", __func__);
219 
220 	mutex_lock(&dvb->mutex);
221 
222 	printk(KERN_INFO "stream %#x\n", dvb->streams);
223 	--(dvb->streams);
224 	if (dvb->streams == 0) {
225 		printk(KERN_INFO "stop stream\n");
226 		tm6000_stop_stream(dev);
227 /*		mutex_destroy(&tm6000_dev->streaming_mutex); */
228 	}
229 	mutex_unlock(&dvb->mutex);
230 /*	mutex_destroy(&tm6000_dev->streaming_mutex); */
231 
232 	return 0;
233 }
234 
tm6000_dvb_attach_frontend(struct tm6000_core * dev)235 static int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
236 {
237 	struct tm6000_dvb *dvb = dev->dvb;
238 
239 	if (dev->caps.has_zl10353) {
240 		struct zl10353_config config = {
241 				     .demod_address = dev->demod_addr,
242 				     .no_tuner = 1,
243 				     .parallel_ts = 1,
244 				     .if2 = 45700,
245 				     .disable_i2c_gate_ctrl = 1,
246 				    };
247 
248 		dvb->frontend = dvb_attach(zl10353_attach, &config,
249 							   &dev->i2c_adap);
250 	} else {
251 		printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
252 		return -1;
253 	}
254 
255 	return (!dvb->frontend) ? -1 : 0;
256 }
257 
258 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
259 
register_dvb(struct tm6000_core * dev)260 static int register_dvb(struct tm6000_core *dev)
261 {
262 	int ret = -1;
263 	struct tm6000_dvb *dvb = dev->dvb;
264 
265 	mutex_init(&dvb->mutex);
266 
267 	dvb->streams = 0;
268 
269 	/* attach the frontend */
270 	ret = tm6000_dvb_attach_frontend(dev);
271 	if (ret < 0) {
272 		printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
273 		goto err;
274 	}
275 
276 	ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
277 					THIS_MODULE, &dev->udev->dev, adapter_nr);
278 	dvb->adapter.priv = dev;
279 
280 	if (dvb->frontend) {
281 		switch (dev->tuner_type) {
282 		case TUNER_XC2028: {
283 			struct xc2028_config cfg = {
284 				.i2c_adap = &dev->i2c_adap,
285 				.i2c_addr = dev->tuner_addr,
286 			};
287 
288 			dvb->frontend->callback = tm6000_tuner_callback;
289 			ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
290 			if (ret < 0) {
291 				printk(KERN_ERR
292 					"tm6000: couldn't register frontend\n");
293 				goto adapter_err;
294 			}
295 
296 			if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
297 				printk(KERN_ERR "tm6000: couldn't register "
298 						"frontend (xc3028)\n");
299 				ret = -EINVAL;
300 				goto frontend_err;
301 			}
302 			printk(KERN_INFO "tm6000: XC2028/3028 asked to be "
303 					 "attached to frontend!\n");
304 			break;
305 			}
306 		case TUNER_XC5000: {
307 			struct xc5000_config cfg = {
308 				.i2c_address = dev->tuner_addr,
309 			};
310 
311 			dvb->frontend->callback = tm6000_xc5000_callback;
312 			ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
313 			if (ret < 0) {
314 				printk(KERN_ERR
315 					"tm6000: couldn't register frontend\n");
316 				goto adapter_err;
317 			}
318 
319 			if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
320 				printk(KERN_ERR "tm6000: couldn't register "
321 						"frontend (xc5000)\n");
322 				ret = -EINVAL;
323 				goto frontend_err;
324 			}
325 			printk(KERN_INFO "tm6000: XC5000 asked to be "
326 					 "attached to frontend!\n");
327 			break;
328 			}
329 		}
330 	} else
331 		printk(KERN_ERR "tm6000: no frontend found\n");
332 
333 	dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
334 							    | DMX_MEMORY_BASED_FILTERING;
335 	dvb->demux.priv = dev;
336 	dvb->demux.filternum = 8;
337 	dvb->demux.feednum = 8;
338 	dvb->demux.start_feed = tm6000_start_feed;
339 	dvb->demux.stop_feed = tm6000_stop_feed;
340 	dvb->demux.write_to_decoder = NULL;
341 	ret = dvb_dmx_init(&dvb->demux);
342 	if (ret < 0) {
343 		printk(KERN_ERR "tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
344 		goto frontend_err;
345 	}
346 
347 	dvb->dmxdev.filternum = dev->dvb->demux.filternum;
348 	dvb->dmxdev.demux = &dev->dvb->demux.dmx;
349 	dvb->dmxdev.capabilities = 0;
350 
351 	ret =  dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
352 	if (ret < 0) {
353 		printk(KERN_ERR "tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
354 		goto dvb_dmx_err;
355 	}
356 
357 	return 0;
358 
359 dvb_dmx_err:
360 	dvb_dmx_release(&dvb->demux);
361 frontend_err:
362 	if (dvb->frontend) {
363 		dvb_frontend_detach(dvb->frontend);
364 		dvb_unregister_frontend(dvb->frontend);
365 	}
366 adapter_err:
367 	dvb_unregister_adapter(&dvb->adapter);
368 err:
369 	return ret;
370 }
371 
unregister_dvb(struct tm6000_core * dev)372 static void unregister_dvb(struct tm6000_core *dev)
373 {
374 	struct tm6000_dvb *dvb = dev->dvb;
375 
376 	if (dvb->bulk_urb != NULL) {
377 		struct urb *bulk_urb = dvb->bulk_urb;
378 
379 		kfree(bulk_urb->transfer_buffer);
380 		bulk_urb->transfer_buffer = NULL;
381 		usb_unlink_urb(bulk_urb);
382 		usb_free_urb(bulk_urb);
383 	}
384 
385 /*	mutex_lock(&tm6000_driver.open_close_mutex); */
386 	if (dvb->frontend) {
387 		dvb_frontend_detach(dvb->frontend);
388 		dvb_unregister_frontend(dvb->frontend);
389 	}
390 
391 	dvb_dmxdev_release(&dvb->dmxdev);
392 	dvb_dmx_release(&dvb->demux);
393 	dvb_unregister_adapter(&dvb->adapter);
394 	mutex_destroy(&dvb->mutex);
395 /*	mutex_unlock(&tm6000_driver.open_close_mutex); */
396 }
397 
dvb_init(struct tm6000_core * dev)398 static int dvb_init(struct tm6000_core *dev)
399 {
400 	struct tm6000_dvb *dvb;
401 	int rc;
402 
403 	if (!dev)
404 		return 0;
405 
406 	if (!dev->caps.has_dvb)
407 		return 0;
408 
409 	if (dev->udev->speed == USB_SPEED_FULL) {
410 		printk(KERN_INFO "This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)\n");
411 		return 0;
412 	}
413 
414 	dvb = kzalloc(sizeof(struct tm6000_dvb), GFP_KERNEL);
415 	if (!dvb) {
416 		printk(KERN_INFO "Cannot allocate memory\n");
417 		return -ENOMEM;
418 	}
419 
420 	dev->dvb = dvb;
421 
422 	rc = register_dvb(dev);
423 	if (rc < 0) {
424 		kfree(dvb);
425 		dev->dvb = NULL;
426 		return 0;
427 	}
428 
429 	return 0;
430 }
431 
dvb_fini(struct tm6000_core * dev)432 static int dvb_fini(struct tm6000_core *dev)
433 {
434 	if (!dev)
435 		return 0;
436 
437 	if (!dev->caps.has_dvb)
438 		return 0;
439 
440 	if (dev->dvb) {
441 		unregister_dvb(dev);
442 		kfree(dev->dvb);
443 		dev->dvb = NULL;
444 	}
445 
446 	return 0;
447 }
448 
449 static struct tm6000_ops dvb_ops = {
450 	.type	= TM6000_DVB,
451 	.name	= "TM6000 dvb Extension",
452 	.init	= dvb_init,
453 	.fini	= dvb_fini,
454 };
455 
tm6000_dvb_register(void)456 static int __init tm6000_dvb_register(void)
457 {
458 	return tm6000_register_extension(&dvb_ops);
459 }
460 
tm6000_dvb_unregister(void)461 static void __exit tm6000_dvb_unregister(void)
462 {
463 	tm6000_unregister_extension(&dvb_ops);
464 }
465 
466 module_init(tm6000_dvb_register);
467 module_exit(tm6000_dvb_unregister);
468