1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * tm6000-dvb.c - dvb-t support for TM5600/TM6000/TM6010 USB video capture devices
4 *
5 * Copyright (C) 2007 Michel Ludwig <michel.ludwig@gmail.com>
6 */
7
8 #include <linux/kernel.h>
9 #include <linux/slab.h>
10 #include <linux/usb.h>
11
12 #include "tm6000.h"
13 #include "tm6000-regs.h"
14
15 #include "zl10353.h"
16
17 #include <media/tuner.h>
18
19 #include "tuner-xc2028.h"
20 #include "xc5000.h"
21
22 MODULE_DESCRIPTION("DVB driver extension module for tm5600/6000/6010 based TV cards");
23 MODULE_AUTHOR("Mauro Carvalho Chehab");
24 MODULE_LICENSE("GPL");
25
26 MODULE_SUPPORTED_DEVICE("{{Trident, tm5600},{{Trident, tm6000},{{Trident, tm6010}");
27
28 static int debug;
29
30 module_param(debug, int, 0644);
31 MODULE_PARM_DESC(debug, "enable debug message");
32
print_err_status(struct tm6000_core * dev,int packet,int status)33 static inline void print_err_status(struct tm6000_core *dev,
34 int packet, int status)
35 {
36 char *errmsg = "Unknown";
37
38 switch (status) {
39 case -ENOENT:
40 errmsg = "unlinked synchronously";
41 break;
42 case -ECONNRESET:
43 errmsg = "unlinked asynchronously";
44 break;
45 case -ENOSR:
46 errmsg = "Buffer error (overrun)";
47 break;
48 case -EPIPE:
49 errmsg = "Stalled (device not responding)";
50 break;
51 case -EOVERFLOW:
52 errmsg = "Babble (bad cable?)";
53 break;
54 case -EPROTO:
55 errmsg = "Bit-stuff error (bad cable?)";
56 break;
57 case -EILSEQ:
58 errmsg = "CRC/Timeout (could be anything)";
59 break;
60 case -ETIME:
61 errmsg = "Device does not respond";
62 break;
63 }
64 if (packet < 0) {
65 dprintk(dev, 1, "URB status %d [%s].\n",
66 status, errmsg);
67 } else {
68 dprintk(dev, 1, "URB packet %d, status %d [%s].\n",
69 packet, status, errmsg);
70 }
71 }
72
tm6000_urb_received(struct urb * urb)73 static void tm6000_urb_received(struct urb *urb)
74 {
75 int ret;
76 struct tm6000_core *dev = urb->context;
77
78 switch (urb->status) {
79 case 0:
80 case -ETIMEDOUT:
81 break;
82 case -ENOENT:
83 case -ECONNRESET:
84 case -ESHUTDOWN:
85 return;
86 default:
87 print_err_status(dev, 0, urb->status);
88 }
89
90 if (urb->actual_length > 0)
91 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
92 urb->actual_length);
93
94 if (dev->dvb->streams > 0) {
95 ret = usb_submit_urb(urb, GFP_ATOMIC);
96 if (ret < 0) {
97 printk(KERN_ERR "tm6000: error %s\n", __func__);
98 kfree(urb->transfer_buffer);
99 usb_free_urb(urb);
100 dev->dvb->bulk_urb = NULL;
101 }
102 }
103 }
104
tm6000_start_stream(struct tm6000_core * dev)105 static int tm6000_start_stream(struct tm6000_core *dev)
106 {
107 int ret;
108 unsigned int pipe, size;
109 struct tm6000_dvb *dvb = dev->dvb;
110
111 printk(KERN_INFO "tm6000: got start stream request %s\n", __func__);
112
113 if (dev->mode != TM6000_MODE_DIGITAL) {
114 tm6000_init_digital_mode(dev);
115 dev->mode = TM6000_MODE_DIGITAL;
116 }
117
118 dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
119 if (!dvb->bulk_urb)
120 return -ENOMEM;
121
122 pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
123 & USB_ENDPOINT_NUMBER_MASK);
124
125 size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
126 size = size * 15; /* 512 x 8 or 12 or 15 */
127
128 dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
129 if (!dvb->bulk_urb->transfer_buffer) {
130 usb_free_urb(dvb->bulk_urb);
131 dvb->bulk_urb = NULL;
132 return -ENOMEM;
133 }
134
135 usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
136 dvb->bulk_urb->transfer_buffer,
137 size,
138 tm6000_urb_received, dev);
139
140 ret = usb_clear_halt(dev->udev, pipe);
141 if (ret < 0) {
142 printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
143 ret, __func__);
144
145 kfree(dvb->bulk_urb->transfer_buffer);
146 usb_free_urb(dvb->bulk_urb);
147 dvb->bulk_urb = NULL;
148 return ret;
149 } else
150 printk(KERN_ERR "tm6000: pipe reset\n");
151
152 /* mutex_lock(&tm6000_driver.open_close_mutex); */
153 ret = usb_submit_urb(dvb->bulk_urb, GFP_ATOMIC);
154
155 /* mutex_unlock(&tm6000_driver.open_close_mutex); */
156 if (ret) {
157 printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
158 ret);
159
160 kfree(dvb->bulk_urb->transfer_buffer);
161 usb_free_urb(dvb->bulk_urb);
162 dvb->bulk_urb = NULL;
163 return ret;
164 }
165
166 return 0;
167 }
168
tm6000_stop_stream(struct tm6000_core * dev)169 static void tm6000_stop_stream(struct tm6000_core *dev)
170 {
171 struct tm6000_dvb *dvb = dev->dvb;
172
173 if (dvb->bulk_urb) {
174 printk(KERN_INFO "urb killing\n");
175 usb_kill_urb(dvb->bulk_urb);
176 printk(KERN_INFO "urb buffer free\n");
177 kfree(dvb->bulk_urb->transfer_buffer);
178 usb_free_urb(dvb->bulk_urb);
179 dvb->bulk_urb = NULL;
180 }
181 }
182
tm6000_start_feed(struct dvb_demux_feed * feed)183 static int tm6000_start_feed(struct dvb_demux_feed *feed)
184 {
185 struct dvb_demux *demux = feed->demux;
186 struct tm6000_core *dev = demux->priv;
187 struct tm6000_dvb *dvb = dev->dvb;
188 printk(KERN_INFO "tm6000: got start feed request %s\n", __func__);
189
190 mutex_lock(&dvb->mutex);
191 if (dvb->streams == 0) {
192 dvb->streams = 1;
193 /* mutex_init(&tm6000_dev->streming_mutex); */
194 tm6000_start_stream(dev);
195 } else
196 ++(dvb->streams);
197 mutex_unlock(&dvb->mutex);
198
199 return 0;
200 }
201
tm6000_stop_feed(struct dvb_demux_feed * feed)202 static int tm6000_stop_feed(struct dvb_demux_feed *feed)
203 {
204 struct dvb_demux *demux = feed->demux;
205 struct tm6000_core *dev = demux->priv;
206 struct tm6000_dvb *dvb = dev->dvb;
207
208 printk(KERN_INFO "tm6000: got stop feed request %s\n", __func__);
209
210 mutex_lock(&dvb->mutex);
211
212 printk(KERN_INFO "stream %#x\n", dvb->streams);
213 --(dvb->streams);
214 if (dvb->streams == 0) {
215 printk(KERN_INFO "stop stream\n");
216 tm6000_stop_stream(dev);
217 /* mutex_destroy(&tm6000_dev->streaming_mutex); */
218 }
219 mutex_unlock(&dvb->mutex);
220 /* mutex_destroy(&tm6000_dev->streaming_mutex); */
221
222 return 0;
223 }
224
tm6000_dvb_attach_frontend(struct tm6000_core * dev)225 static int tm6000_dvb_attach_frontend(struct tm6000_core *dev)
226 {
227 struct tm6000_dvb *dvb = dev->dvb;
228
229 if (dev->caps.has_zl10353) {
230 struct zl10353_config config = {
231 .demod_address = dev->demod_addr,
232 .no_tuner = 1,
233 .parallel_ts = 1,
234 .if2 = 45700,
235 .disable_i2c_gate_ctrl = 1,
236 };
237
238 dvb->frontend = dvb_attach(zl10353_attach, &config,
239 &dev->i2c_adap);
240 } else {
241 printk(KERN_ERR "tm6000: no frontend defined for the device!\n");
242 return -1;
243 }
244
245 return (!dvb->frontend) ? -1 : 0;
246 }
247
248 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
249
register_dvb(struct tm6000_core * dev)250 static int register_dvb(struct tm6000_core *dev)
251 {
252 int ret = -1;
253 struct tm6000_dvb *dvb = dev->dvb;
254
255 mutex_init(&dvb->mutex);
256
257 dvb->streams = 0;
258
259 /* attach the frontend */
260 ret = tm6000_dvb_attach_frontend(dev);
261 if (ret < 0) {
262 printk(KERN_ERR "tm6000: couldn't attach the frontend!\n");
263 goto err;
264 }
265
266 ret = dvb_register_adapter(&dvb->adapter, "Trident TVMaster 6000 DVB-T",
267 THIS_MODULE, &dev->udev->dev, adapter_nr);
268 if (ret < 0) {
269 pr_err("tm6000: couldn't register the adapter!\n");
270 goto err;
271 }
272
273 dvb->adapter.priv = dev;
274
275 if (dvb->frontend) {
276 switch (dev->tuner_type) {
277 case TUNER_XC2028: {
278 struct xc2028_config cfg = {
279 .i2c_adap = &dev->i2c_adap,
280 .i2c_addr = dev->tuner_addr,
281 };
282
283 dvb->frontend->callback = tm6000_tuner_callback;
284 ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
285 if (ret < 0) {
286 printk(KERN_ERR
287 "tm6000: couldn't register frontend\n");
288 goto adapter_err;
289 }
290
291 if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
292 printk(KERN_ERR "tm6000: couldn't register frontend (xc3028)\n");
293 ret = -EINVAL;
294 goto frontend_err;
295 }
296 printk(KERN_INFO "tm6000: XC2028/3028 asked to be attached to frontend!\n");
297 break;
298 }
299 case TUNER_XC5000: {
300 struct xc5000_config cfg = {
301 .i2c_address = dev->tuner_addr,
302 };
303
304 dvb->frontend->callback = tm6000_xc5000_callback;
305 ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
306 if (ret < 0) {
307 printk(KERN_ERR
308 "tm6000: couldn't register frontend\n");
309 goto adapter_err;
310 }
311
312 if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
313 printk(KERN_ERR "tm6000: couldn't register frontend (xc5000)\n");
314 ret = -EINVAL;
315 goto frontend_err;
316 }
317 printk(KERN_INFO "tm6000: XC5000 asked to be attached to frontend!\n");
318 break;
319 }
320 }
321 } else
322 printk(KERN_ERR "tm6000: no frontend found\n");
323
324 dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
325 | DMX_MEMORY_BASED_FILTERING;
326 dvb->demux.priv = dev;
327 dvb->demux.filternum = 8;
328 dvb->demux.feednum = 8;
329 dvb->demux.start_feed = tm6000_start_feed;
330 dvb->demux.stop_feed = tm6000_stop_feed;
331 dvb->demux.write_to_decoder = NULL;
332 ret = dvb_dmx_init(&dvb->demux);
333 if (ret < 0) {
334 printk(KERN_ERR "tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
335 goto frontend_err;
336 }
337
338 dvb->dmxdev.filternum = dev->dvb->demux.filternum;
339 dvb->dmxdev.demux = &dev->dvb->demux.dmx;
340 dvb->dmxdev.capabilities = 0;
341
342 ret = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
343 if (ret < 0) {
344 printk(KERN_ERR "tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
345 goto dvb_dmx_err;
346 }
347
348 return 0;
349
350 dvb_dmx_err:
351 dvb_dmx_release(&dvb->demux);
352 frontend_err:
353 if (dvb->frontend) {
354 dvb_unregister_frontend(dvb->frontend);
355 dvb_frontend_detach(dvb->frontend);
356 }
357 adapter_err:
358 dvb_unregister_adapter(&dvb->adapter);
359 err:
360 return ret;
361 }
362
unregister_dvb(struct tm6000_core * dev)363 static void unregister_dvb(struct tm6000_core *dev)
364 {
365 struct tm6000_dvb *dvb = dev->dvb;
366
367 if (dvb->bulk_urb) {
368 struct urb *bulk_urb = dvb->bulk_urb;
369
370 kfree(bulk_urb->transfer_buffer);
371 bulk_urb->transfer_buffer = NULL;
372 usb_unlink_urb(bulk_urb);
373 usb_free_urb(bulk_urb);
374 }
375
376 /* mutex_lock(&tm6000_driver.open_close_mutex); */
377 if (dvb->frontend) {
378 dvb_unregister_frontend(dvb->frontend);
379 dvb_frontend_detach(dvb->frontend);
380 }
381
382 dvb_dmxdev_release(&dvb->dmxdev);
383 dvb_dmx_release(&dvb->demux);
384 dvb_unregister_adapter(&dvb->adapter);
385 mutex_destroy(&dvb->mutex);
386 /* mutex_unlock(&tm6000_driver.open_close_mutex); */
387 }
388
dvb_init(struct tm6000_core * dev)389 static int dvb_init(struct tm6000_core *dev)
390 {
391 struct tm6000_dvb *dvb;
392 int rc;
393
394 if (!dev)
395 return 0;
396
397 if (!dev->caps.has_dvb)
398 return 0;
399
400 if (dev->udev->speed == USB_SPEED_FULL) {
401 printk(KERN_INFO "This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)\n");
402 return 0;
403 }
404
405 dvb = kzalloc(sizeof(struct tm6000_dvb), GFP_KERNEL);
406 if (!dvb)
407 return -ENOMEM;
408
409 dev->dvb = dvb;
410
411 rc = register_dvb(dev);
412 if (rc < 0) {
413 kfree(dvb);
414 dev->dvb = NULL;
415 return 0;
416 }
417
418 return 0;
419 }
420
dvb_fini(struct tm6000_core * dev)421 static int dvb_fini(struct tm6000_core *dev)
422 {
423 if (!dev)
424 return 0;
425
426 if (!dev->caps.has_dvb)
427 return 0;
428
429 if (dev->dvb) {
430 unregister_dvb(dev);
431 kfree(dev->dvb);
432 dev->dvb = NULL;
433 }
434
435 return 0;
436 }
437
438 static struct tm6000_ops dvb_ops = {
439 .type = TM6000_DVB,
440 .name = "TM6000 dvb Extension",
441 .init = dvb_init,
442 .fini = dvb_fini,
443 };
444
tm6000_dvb_register(void)445 static int __init tm6000_dvb_register(void)
446 {
447 return tm6000_register_extension(&dvb_ops);
448 }
449
tm6000_dvb_unregister(void)450 static void __exit tm6000_dvb_unregister(void)
451 {
452 tm6000_unregister_extension(&dvb_ops);
453 }
454
455 module_init(tm6000_dvb_register);
456 module_exit(tm6000_dvb_unregister);
457