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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
34MODULE_DESCRIPTION("DVB driver extension module for tm5600/6000/6010 based TV cards");
35MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
36MODULE_LICENSE("GPL");
37
38MODULE_SUPPORTED_DEVICE("{{Trident, tm5600},"
39 "{{Trident, tm6000},"
40 "{{Trident, tm6010}");
41
42static int debug;
43
44module_param(debug, int, 0644);
45MODULE_PARM_DESC(debug, "enable debug message");
46
47static 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
87static void tm6000_urb_received(struct urb *urb)
88{
89 int ret;
90 struct tm6000_core *dev = urb->context;
91
92 if (urb->status != 0)
93 print_err_status(dev, 0, urb->status);
94 else if (urb->actual_length > 0)
95 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer,
96 urb->actual_length);
97
98 if (dev->dvb->streams > 0) {
99 ret = usb_submit_urb(urb, GFP_ATOMIC);
100 if (ret < 0) {
101 printk(KERN_ERR "tm6000: error %s\n", __func__);
102 kfree(urb->transfer_buffer);
103 usb_free_urb(urb);
104 }
105 }
106}
107
108int tm6000_start_stream(struct tm6000_core *dev)
109{
110 int ret;
111 unsigned int pipe, size;
112 struct tm6000_dvb *dvb = dev->dvb;
113
114 printk(KERN_INFO "tm6000: got start stream request %s\n", __func__);
115
116 if (dev->mode != TM6000_MODE_DIGITAL) {
117 tm6000_init_digital_mode(dev);
118 dev->mode = TM6000_MODE_DIGITAL;
119 }
120
121 dvb->bulk_urb = usb_alloc_urb(0, GFP_KERNEL);
122 if (dvb->bulk_urb == NULL) {
123 printk(KERN_ERR "tm6000: couldn't allocate urb\n");
124 return -ENOMEM;
125 }
126
127 pipe = usb_rcvbulkpipe(dev->udev, dev->bulk_in.endp->desc.bEndpointAddress
128 & USB_ENDPOINT_NUMBER_MASK);
129
130 size = usb_maxpacket(dev->udev, pipe, usb_pipeout(pipe));
131 size = size * 15; /* 512 x 8 or 12 or 15 */
132
133 dvb->bulk_urb->transfer_buffer = kzalloc(size, GFP_KERNEL);
134 if (dvb->bulk_urb->transfer_buffer == NULL) {
135 usb_free_urb(dvb->bulk_urb);
136 printk(KERN_ERR "tm6000: couldn't allocate transfer buffer!\n");
137 return -ENOMEM;
138 }
139
140 usb_fill_bulk_urb(dvb->bulk_urb, dev->udev, pipe,
141 dvb->bulk_urb->transfer_buffer,
142 size,
143 tm6000_urb_received, dev);
144
145 ret = usb_clear_halt(dev->udev, pipe);
146 if (ret < 0) {
147 printk(KERN_ERR "tm6000: error %i in %s during pipe reset\n",
148 ret, __func__);
149 return ret;
150 } else
151 printk(KERN_ERR "tm6000: pipe resetted\n");
152
153/* mutex_lock(&tm6000_driver.open_close_mutex); */
154 ret = usb_submit_urb(dvb->bulk_urb, GFP_KERNEL);
155
156/* mutex_unlock(&tm6000_driver.open_close_mutex); */
157 if (ret) {
158 printk(KERN_ERR "tm6000: submit of urb failed (error=%i)\n",
159 ret);
160
161 kfree(dvb->bulk_urb->transfer_buffer);
162 usb_free_urb(dvb->bulk_urb);
163 return ret;
164 }
165
166 return 0;
167}
168
169void 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
183int 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
202int 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
225int 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
248DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
249
250int 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 dvb->adapter.priv = dev;
269
270 if (dvb->frontend) {
271 switch (dev->tuner_type) {
272 case TUNER_XC2028: {
273 struct xc2028_config cfg = {
274 .i2c_adap = &dev->i2c_adap,
275 .i2c_addr = dev->tuner_addr,
276 };
277
278 dvb->frontend->callback = tm6000_tuner_callback;
279 ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
280 if (ret < 0) {
281 printk(KERN_ERR
282 "tm6000: couldn't register frontend\n");
283 goto adapter_err;
284 }
285
286 if (!dvb_attach(xc2028_attach, dvb->frontend, &cfg)) {
287 printk(KERN_ERR "tm6000: couldn't register "
288 "frontend (xc3028)\n");
289 ret = -EINVAL;
290 goto frontend_err;
291 }
292 printk(KERN_INFO "tm6000: XC2028/3028 asked to be "
293 "attached to frontend!\n");
294 break;
295 }
296 case TUNER_XC5000: {
297 struct xc5000_config cfg = {
298 .i2c_address = dev->tuner_addr,
299 };
300
301 dvb->frontend->callback = tm6000_xc5000_callback;
302 ret = dvb_register_frontend(&dvb->adapter, dvb->frontend);
303 if (ret < 0) {
304 printk(KERN_ERR
305 "tm6000: couldn't register frontend\n");
306 goto adapter_err;
307 }
308
309 if (!dvb_attach(xc5000_attach, dvb->frontend, &dev->i2c_adap, &cfg)) {
310 printk(KERN_ERR "tm6000: couldn't register "
311 "frontend (xc5000)\n");
312 ret = -EINVAL;
313 goto frontend_err;
314 }
315 printk(KERN_INFO "tm6000: XC5000 asked to be "
316 "attached to frontend!\n");
317 break;
318 }
319 }
320 } else
321 printk(KERN_ERR "tm6000: no frontend found\n");
322
323 dvb->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING
324 | DMX_MEMORY_BASED_FILTERING;
325 dvb->demux.priv = dev;
326 dvb->demux.filternum = 8;
327 dvb->demux.feednum = 8;
328 dvb->demux.start_feed = tm6000_start_feed;
329 dvb->demux.stop_feed = tm6000_stop_feed;
330 dvb->demux.write_to_decoder = NULL;
331 ret = dvb_dmx_init(&dvb->demux);
332 if (ret < 0) {
333 printk("tm6000: dvb_dmx_init failed (errno = %d)\n", ret);
334 goto frontend_err;
335 }
336
337 dvb->dmxdev.filternum = dev->dvb->demux.filternum;
338 dvb->dmxdev.demux = &dev->dvb->demux.dmx;
339 dvb->dmxdev.capabilities = 0;
340
341 ret = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
342 if (ret < 0) {
343 printk("tm6000: dvb_dmxdev_init failed (errno = %d)\n", ret);
344 goto dvb_dmx_err;
345 }
346
347 return 0;
348
349dvb_dmx_err:
350 dvb_dmx_release(&dvb->demux);
351frontend_err:
352 if (dvb->frontend) {
353 dvb_frontend_detach(dvb->frontend);
354 dvb_unregister_frontend(dvb->frontend);
355 }
356adapter_err:
357 dvb_unregister_adapter(&dvb->adapter);
358err:
359 return ret;
360}
361
362void unregister_dvb(struct tm6000_core *dev)
363{
364 struct tm6000_dvb *dvb = dev->dvb;
365
366 if (dvb->bulk_urb != NULL) {
367 struct urb *bulk_urb = dvb->bulk_urb;
368
369 kfree(bulk_urb->transfer_buffer);
370 bulk_urb->transfer_buffer = NULL;
371 usb_unlink_urb(bulk_urb);
372 usb_free_urb(bulk_urb);
373 }
374
375/* mutex_lock(&tm6000_driver.open_close_mutex); */
376 if (dvb->frontend) {
377 dvb_frontend_detach(dvb->frontend);
378 dvb_unregister_frontend(dvb->frontend);
379 }
380
381 dvb_dmxdev_release(&dvb->dmxdev);
382 dvb_dmx_release(&dvb->demux);
383 dvb_unregister_adapter(&dvb->adapter);
384 mutex_destroy(&dvb->mutex);
385/* mutex_unlock(&tm6000_driver.open_close_mutex); */
386}
387
388static int dvb_init(struct tm6000_core *dev)
389{
390 struct tm6000_dvb *dvb;
391 int rc;
392
393 if (!dev)
394 return 0;
395
396 if (!dev->caps.has_dvb)
397 return 0;
398
399 dvb = kzalloc(sizeof(struct tm6000_dvb), GFP_KERNEL);
400 if (!dvb) {
401 printk(KERN_INFO "Cannot allocate memory\n");
402 return -ENOMEM;
403 }
404
405 dev->dvb = dvb;
406
407 rc = register_dvb(dev);
408 if (rc < 0) {
409 kfree(dvb);
410 dev->dvb = NULL;
411 return 0;
412 }
413
414 return 0;
415}
416
417static int dvb_fini(struct tm6000_core *dev)
418{
419 if (!dev)
420 return 0;
421
422 if (!dev->caps.has_dvb)
423 return 0;
424
425 if (dev->dvb) {
426 unregister_dvb(dev);
427 kfree(dev->dvb);
428 dev->dvb = NULL;
429 }
430
431 return 0;
432}
433
434static struct tm6000_ops dvb_ops = {
435 .type = TM6000_DVB,
436 .name = "TM6000 dvb Extension",
437 .init = dvb_init,
438 .fini = dvb_fini,
439};
440
441static int __init tm6000_dvb_register(void)
442{
443 return tm6000_register_extension(&dvb_ops);
444}
445
446static void __exit tm6000_dvb_unregister(void)
447{
448 tm6000_unregister_extension(&dvb_ops);
449}
450
451module_init(tm6000_dvb_register);
452module_exit(tm6000_dvb_unregister);