V4L/DVB (8975): af9015: cleanup
[linux-2.6] / drivers / media / video / em28xx / em28xx-dvb.c
1 /*
2  DVB device driver for em28xx
3
4  (c) 2008 Mauro Carvalho Chehab <mchehab@infradead.org>
5
6  (c) 2008 Devin Heitmueller <devin.heitmueller@gmail.com>
7         - Fixes for the driver to properly work with HVR-950
8         - Fixes for the driver to properly work with Pinnacle PCTV HD Pro Stick
9         - Fixes for the driver to properly work with AMD ATI TV Wonder HD 600
10
11  (c) 2008 Aidan Thornton <makosoft@googlemail.com>
12
13  Based on cx88-dvb, saa7134-dvb and videobuf-dvb originally written by:
14         (c) 2004, 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
15         (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
16
17  This program is free software; you can redistribute it and/or modify
18  it under the terms of the GNU General Public License as published by
19  the Free Software Foundation; either version 2 of the License.
20  */
21
22 #include <linux/kernel.h>
23 #include <linux/usb.h>
24
25 #include "em28xx.h"
26 #include <media/v4l2-common.h>
27 #include <media/videobuf-vmalloc.h>
28
29 #include "lgdt330x.h"
30 #include "zl10353.h"
31 #ifdef EM28XX_DRX397XD_SUPPORT
32 #include "drx397xD.h"
33 #endif
34
35 MODULE_DESCRIPTION("driver for em28xx based DVB cards");
36 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
37 MODULE_LICENSE("GPL");
38
39 static unsigned int debug;
40 module_param(debug, int, 0644);
41 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
42
43 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
44
45 #define dprintk(level, fmt, arg...) do {                        \
46 if (debug >= level)                                             \
47         printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
48 } while (0)
49
50 #define EM28XX_DVB_NUM_BUFS 5
51 #define EM28XX_DVB_MAX_PACKETSIZE 564
52 #define EM28XX_DVB_MAX_PACKETS 64
53
54 struct em28xx_dvb {
55         struct dvb_frontend        *frontend;
56
57         /* feed count management */
58         struct mutex               lock;
59         int                        nfeeds;
60
61         /* general boilerplate stuff */
62         struct dvb_adapter         adapter;
63         struct dvb_demux           demux;
64         struct dmxdev              dmxdev;
65         struct dmx_frontend        fe_hw;
66         struct dmx_frontend        fe_mem;
67         struct dvb_net             net;
68 };
69
70
71 static inline void print_err_status(struct em28xx *dev,
72                                      int packet, int status)
73 {
74         char *errmsg = "Unknown";
75
76         switch (status) {
77         case -ENOENT:
78                 errmsg = "unlinked synchronuously";
79                 break;
80         case -ECONNRESET:
81                 errmsg = "unlinked asynchronuously";
82                 break;
83         case -ENOSR:
84                 errmsg = "Buffer error (overrun)";
85                 break;
86         case -EPIPE:
87                 errmsg = "Stalled (device not responding)";
88                 break;
89         case -EOVERFLOW:
90                 errmsg = "Babble (bad cable?)";
91                 break;
92         case -EPROTO:
93                 errmsg = "Bit-stuff error (bad cable?)";
94                 break;
95         case -EILSEQ:
96                 errmsg = "CRC/Timeout (could be anything)";
97                 break;
98         case -ETIME:
99                 errmsg = "Device does not respond";
100                 break;
101         }
102         if (packet < 0) {
103                 dprintk(1, "URB status %d [%s].\n", status, errmsg);
104         } else {
105                 dprintk(1, "URB packet %d, status %d [%s].\n",
106                         packet, status, errmsg);
107         }
108 }
109
110 static inline int dvb_isoc_copy(struct em28xx *dev, struct urb *urb)
111 {
112         int i;
113
114         if (!dev)
115                 return 0;
116
117         if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
118                 return 0;
119
120         if (urb->status < 0) {
121                 print_err_status(dev, -1, urb->status);
122                 if (urb->status == -ENOENT)
123                         return 0;
124         }
125
126         for (i = 0; i < urb->number_of_packets; i++) {
127                 int status = urb->iso_frame_desc[i].status;
128
129                 if (status < 0) {
130                         print_err_status(dev, i, status);
131                         if (urb->iso_frame_desc[i].status != -EPROTO)
132                                 continue;
133                 }
134
135                 dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
136                                  urb->iso_frame_desc[i].offset,
137                                  urb->iso_frame_desc[i].actual_length);
138         }
139
140         return 0;
141 }
142
143 static int start_streaming(struct em28xx_dvb *dvb)
144 {
145         int rc;
146         struct em28xx *dev = dvb->adapter.priv;
147
148         usb_set_interface(dev->udev, 0, 1);
149         rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
150         if (rc < 0)
151                 return rc;
152
153         return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS,
154                                 EM28XX_DVB_NUM_BUFS, EM28XX_DVB_MAX_PACKETSIZE,
155                                 dvb_isoc_copy);
156 }
157
158 static int stop_streaming(struct em28xx_dvb *dvb)
159 {
160         struct em28xx *dev = dvb->adapter.priv;
161
162         em28xx_uninit_isoc(dev);
163
164         em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
165
166         return 0;
167 }
168
169 static int start_feed(struct dvb_demux_feed *feed)
170 {
171         struct dvb_demux *demux  = feed->demux;
172         struct em28xx_dvb *dvb = demux->priv;
173         int rc, ret;
174
175         if (!demux->dmx.frontend)
176                 return -EINVAL;
177
178         mutex_lock(&dvb->lock);
179         dvb->nfeeds++;
180         rc = dvb->nfeeds;
181
182         if (dvb->nfeeds == 1) {
183                 ret = start_streaming(dvb);
184                 if (ret < 0)
185                         rc = ret;
186         }
187
188         mutex_unlock(&dvb->lock);
189         return rc;
190 }
191
192 static int stop_feed(struct dvb_demux_feed *feed)
193 {
194         struct dvb_demux *demux  = feed->demux;
195         struct em28xx_dvb *dvb = demux->priv;
196         int err = 0;
197
198         mutex_lock(&dvb->lock);
199         dvb->nfeeds--;
200
201         if (0 == dvb->nfeeds)
202                 err = stop_streaming(dvb);
203
204         mutex_unlock(&dvb->lock);
205         return err;
206 }
207
208
209
210 /* ------------------------------------------------------------------ */
211 static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
212 {
213         struct em28xx *dev = fe->dvb->priv;
214
215         if (acquire)
216                 return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
217         else
218                 return em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
219 }
220
221 /* ------------------------------------------------------------------ */
222
223 static struct lgdt330x_config em2880_lgdt3303_dev = {
224         .demod_address = 0x0e,
225         .demod_chip = LGDT3303,
226 };
227
228 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
229         .demod_address = (0x1e >> 1),
230         .no_tuner = 1,
231         .parallel_ts = 1,
232         .if2 = 45600,
233 };
234
235 #ifdef EM28XX_DRX397XD_SUPPORT
236 /* [TODO] djh - not sure yet what the device config needs to contain */
237 static struct drx397xD_config em28xx_drx397xD_with_xc3028 = {
238         .demod_address = (0xe0 >> 1),
239 };
240 #endif
241
242 /* ------------------------------------------------------------------ */
243
244 static int attach_xc3028(u8 addr, struct em28xx *dev)
245 {
246         struct dvb_frontend *fe;
247         struct xc2028_config cfg;
248
249         memset(&cfg, 0, sizeof(cfg));
250         cfg.i2c_adap  = &dev->i2c_adap;
251         cfg.i2c_addr  = addr;
252         cfg.callback  = em28xx_tuner_callback;
253
254         if (!dev->dvb->frontend) {
255                 printk(KERN_ERR "%s/2: dvb frontend not attached. "
256                                 "Can't attach xc3028\n",
257                        dev->name);
258                 return -EINVAL;
259         }
260
261         fe = dvb_attach(xc2028_attach, dev->dvb->frontend, &cfg);
262         if (!fe) {
263                 printk(KERN_ERR "%s/2: xc3028 attach failed\n",
264                        dev->name);
265                 dvb_frontend_detach(dev->dvb->frontend);
266                 dev->dvb->frontend = NULL;
267                 return -EINVAL;
268         }
269
270         printk(KERN_INFO "%s/2: xc3028 attached\n", dev->name);
271
272         return 0;
273 }
274
275 /* ------------------------------------------------------------------ */
276
277 static int register_dvb(struct em28xx_dvb *dvb,
278                  struct module *module,
279                  struct em28xx *dev,
280                  struct device *device)
281 {
282         int result;
283
284         mutex_init(&dvb->lock);
285
286         /* register adapter */
287         result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
288                                       adapter_nr);
289         if (result < 0) {
290                 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
291                        dev->name, result);
292                 goto fail_adapter;
293         }
294
295         /* Ensure all frontends negotiate bus access */
296         dvb->frontend->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
297
298         dvb->adapter.priv = dev;
299
300         /* register frontend */
301         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
302         if (result < 0) {
303                 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
304                        dev->name, result);
305                 goto fail_frontend;
306         }
307
308         /* register demux stuff */
309         dvb->demux.dmx.capabilities =
310                 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
311                 DMX_MEMORY_BASED_FILTERING;
312         dvb->demux.priv       = dvb;
313         dvb->demux.filternum  = 256;
314         dvb->demux.feednum    = 256;
315         dvb->demux.start_feed = start_feed;
316         dvb->demux.stop_feed  = stop_feed;
317
318         result = dvb_dmx_init(&dvb->demux);
319         if (result < 0) {
320                 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
321                        dev->name, result);
322                 goto fail_dmx;
323         }
324
325         dvb->dmxdev.filternum    = 256;
326         dvb->dmxdev.demux        = &dvb->demux.dmx;
327         dvb->dmxdev.capabilities = 0;
328         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
329         if (result < 0) {
330                 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
331                        dev->name, result);
332                 goto fail_dmxdev;
333         }
334
335         dvb->fe_hw.source = DMX_FRONTEND_0;
336         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
337         if (result < 0) {
338                 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
339                        dev->name, result);
340                 goto fail_fe_hw;
341         }
342
343         dvb->fe_mem.source = DMX_MEMORY_FE;
344         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
345         if (result < 0) {
346                 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
347                        dev->name, result);
348                 goto fail_fe_mem;
349         }
350
351         result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
352         if (result < 0) {
353                 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
354                        dev->name, result);
355                 goto fail_fe_conn;
356         }
357
358         /* register network adapter */
359         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
360         return 0;
361
362 fail_fe_conn:
363         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
364 fail_fe_mem:
365         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
366 fail_fe_hw:
367         dvb_dmxdev_release(&dvb->dmxdev);
368 fail_dmxdev:
369         dvb_dmx_release(&dvb->demux);
370 fail_dmx:
371         dvb_unregister_frontend(dvb->frontend);
372 fail_frontend:
373         dvb_frontend_detach(dvb->frontend);
374         dvb_unregister_adapter(&dvb->adapter);
375 fail_adapter:
376         return result;
377 }
378
379 static void unregister_dvb(struct em28xx_dvb *dvb)
380 {
381         dvb_net_release(&dvb->net);
382         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
383         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
384         dvb_dmxdev_release(&dvb->dmxdev);
385         dvb_dmx_release(&dvb->demux);
386         dvb_unregister_frontend(dvb->frontend);
387         dvb_frontend_detach(dvb->frontend);
388         dvb_unregister_adapter(&dvb->adapter);
389 }
390
391
392 static int dvb_init(struct em28xx *dev)
393 {
394         int result = 0;
395         struct em28xx_dvb *dvb;
396
397         if (!dev->has_dvb) {
398                 /* This device does not support the extension */
399                 return 0;
400         }
401
402         dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
403
404         if (dvb == NULL) {
405                 printk(KERN_INFO "em28xx_dvb: memory allocation failed\n");
406                 return -ENOMEM;
407         }
408         dev->dvb = dvb;
409
410         em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
411         /* init frontend */
412         switch (dev->model) {
413         case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
414         case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
415         case EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600:
416                 dvb->frontend = dvb_attach(lgdt330x_attach,
417                                            &em2880_lgdt3303_dev,
418                                            &dev->i2c_adap);
419                 if (attach_xc3028(0x61, dev) < 0) {
420                         result = -EINVAL;
421                         goto out_free;
422                 }
423                 break;
424         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
425                 dvb->frontend = dvb_attach(zl10353_attach,
426                                            &em28xx_zl10353_with_xc3028,
427                                            &dev->i2c_adap);
428                 if (attach_xc3028(0x61, dev) < 0) {
429                         result = -EINVAL;
430                         goto out_free;
431                 }
432                 break;
433         case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
434 #ifdef EM28XX_DRX397XD_SUPPORT
435                 /* We don't have the config structure properly populated, so
436                    this is commented out for now */
437                 dvb->frontend = dvb_attach(drx397xD_attach,
438                                            &em28xx_drx397xD_with_xc3028,
439                                            &dev->i2c_adap);
440                 if (attach_xc3028(0x61, dev) < 0) {
441                         result = -EINVAL;
442                         goto out_free;
443                 }
444                 break;
445 #endif
446         case EM2880_BOARD_TERRATEC_HYBRID_XS:
447                 dvb->frontend = dvb_attach(zl10353_attach,
448                                                 &em28xx_zl10353_with_xc3028,
449                                                 &dev->i2c_adap);
450                 if (attach_xc3028(0x61, dev) < 0) {
451                          result = -EINVAL;
452                         goto out_free;
453                 }
454                 break;
455         case EM2880_BOARD_KWORLD_DVB_310U:
456                 dvb->frontend = dvb_attach(zl10353_attach,
457                                                 &em28xx_zl10353_with_xc3028,
458                                                 &dev->i2c_adap);
459                 if (attach_xc3028(0x61, dev) < 0) {
460                         result = -EINVAL;
461                         goto out_free;
462                 }
463                 break;
464         default:
465                 printk(KERN_ERR "%s/2: The frontend of your DVB/ATSC card"
466                                 " isn't supported yet\n",
467                        dev->name);
468                 break;
469         }
470         if (NULL == dvb->frontend) {
471                 printk(KERN_ERR
472                        "%s/2: frontend initialization failed\n",
473                        dev->name);
474                 result = -EINVAL;
475                 goto out_free;
476         }
477
478         /* register everything */
479         result = register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
480
481         if (result < 0)
482                 goto out_free;
483
484         em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
485         printk(KERN_INFO "Successfully loaded em28xx-dvb\n");
486         return 0;
487
488 out_free:
489         em28xx_set_mode(dev, EM28XX_MODE_UNDEFINED);
490         kfree(dvb);
491         dev->dvb = NULL;
492         return result;
493 }
494
495 static int dvb_fini(struct em28xx *dev)
496 {
497         if (!dev->has_dvb) {
498                 /* This device does not support the extension */
499                 return 0;
500         }
501
502         if (dev->dvb) {
503                 unregister_dvb(dev->dvb);
504                 dev->dvb = NULL;
505         }
506
507         return 0;
508 }
509
510 static struct em28xx_ops dvb_ops = {
511         .id   = EM28XX_DVB,
512         .name = "Em28xx dvb Extension",
513         .init = dvb_init,
514         .fini = dvb_fini,
515 };
516
517 static int __init em28xx_dvb_register(void)
518 {
519         return em28xx_register_extension(&dvb_ops);
520 }
521
522 static void __exit em28xx_dvb_unregister(void)
523 {
524         em28xx_unregister_extension(&dvb_ops);
525 }
526
527 module_init(em28xx_dvb_register);
528 module_exit(em28xx_dvb_unregister);