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_unregister_frontend(dvb->frontend);
364 dvb_frontend_detach(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_unregister_frontend(dvb->frontend);
388 dvb_frontend_detach(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