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