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em28xx-dvb.c
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1 /*
2  DVB device driver for em28xx
3 
4  (c) 2008-2011 Mauro Carvalho Chehab <[email protected]>
5 
6  (c) 2008 Devin Heitmueller <[email protected]>
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 <[email protected]>
12 
13  Based on cx88-dvb, saa7134-dvb and videobuf-dvb originally written by:
14  (c) 2004, 2005 Chris Pascoe <[email protected]>
15  (c) 2004 Gerd Knorr <[email protected]> [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/slab.h>
24 #include <linux/usb.h>
25 
26 #include "em28xx.h"
27 #include <media/v4l2-common.h>
28 #include <media/videobuf-vmalloc.h>
29 #include <media/tuner.h>
30 #include "tuner-simple.h"
31 #include <linux/gpio.h>
32 
33 #include "lgdt330x.h"
34 #include "lgdt3305.h"
35 #include "zl10353.h"
36 #include "s5h1409.h"
37 #include "mt352.h"
38 #include "mt352_priv.h" /* FIXME */
39 #include "tda1002x.h"
40 #include "tda18271.h"
41 #include "s921.h"
42 #include "drxd.h"
43 #include "cxd2820r.h"
44 #include "tda18271c2dd.h"
45 #include "drxk.h"
46 #include "tda10071.h"
47 #include "a8293.h"
48 #include "qt1010.h"
49 
50 MODULE_DESCRIPTION("driver for em28xx based DVB cards");
51 MODULE_AUTHOR("Mauro Carvalho Chehab <[email protected]>");
52 MODULE_LICENSE("GPL");
53 
54 static unsigned int debug;
55 module_param(debug, int, 0644);
56 MODULE_PARM_DESC(debug, "enable debug messages [dvb]");
57 
58 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
59 
60 #define dprintk(level, fmt, arg...) do { \
61 if (debug >= level) \
62  printk(KERN_DEBUG "%s/2-dvb: " fmt, dev->name, ## arg); \
63 } while (0)
64 
65 struct em28xx_dvb {
66  struct dvb_frontend *fe[2];
67 
68  /* feed count management */
69  struct mutex lock;
70  int nfeeds;
71 
72  /* general boilerplate stuff */
73  struct dvb_adapter adapter;
74  struct dvb_demux demux;
75  struct dmxdev dmxdev;
76  struct dmx_frontend fe_hw;
77  struct dmx_frontend fe_mem;
78  struct dvb_net net;
79 
80  /* Due to DRX-K - probably need changes */
81  int (*gate_ctrl)(struct dvb_frontend *, int);
82  struct semaphore pll_mutex;
83  bool dont_attach_fe1;
84  int lna_gpio;
85 };
86 
87 
88 static inline void print_err_status(struct em28xx *dev,
89  int packet, int status)
90 {
91  char *errmsg = "Unknown";
92 
93  switch (status) {
94  case -ENOENT:
95  errmsg = "unlinked synchronuously";
96  break;
97  case -ECONNRESET:
98  errmsg = "unlinked asynchronuously";
99  break;
100  case -ENOSR:
101  errmsg = "Buffer error (overrun)";
102  break;
103  case -EPIPE:
104  errmsg = "Stalled (device not responding)";
105  break;
106  case -EOVERFLOW:
107  errmsg = "Babble (bad cable?)";
108  break;
109  case -EPROTO:
110  errmsg = "Bit-stuff error (bad cable?)";
111  break;
112  case -EILSEQ:
113  errmsg = "CRC/Timeout (could be anything)";
114  break;
115  case -ETIME:
116  errmsg = "Device does not respond";
117  break;
118  }
119  if (packet < 0) {
120  dprintk(1, "URB status %d [%s].\n", status, errmsg);
121  } else {
122  dprintk(1, "URB packet %d, status %d [%s].\n",
123  packet, status, errmsg);
124  }
125 }
126 
127 static inline int em28xx_dvb_isoc_copy(struct em28xx *dev, struct urb *urb)
128 {
129  int i;
130 
131  if (!dev)
132  return 0;
133 
134  if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
135  return 0;
136 
137  if (urb->status < 0) {
138  print_err_status(dev, -1, urb->status);
139  if (urb->status == -ENOENT)
140  return 0;
141  }
142 
143  for (i = 0; i < urb->number_of_packets; i++) {
144  int status = urb->iso_frame_desc[i].status;
145 
146  if (status < 0) {
147  print_err_status(dev, i, status);
148  if (urb->iso_frame_desc[i].status != -EPROTO)
149  continue;
150  }
151 
152  dvb_dmx_swfilter(&dev->dvb->demux, urb->transfer_buffer +
153  urb->iso_frame_desc[i].offset,
154  urb->iso_frame_desc[i].actual_length);
155  }
156 
157  return 0;
158 }
159 
160 static int em28xx_start_streaming(struct em28xx_dvb *dvb)
161 {
162  int rc;
163  struct em28xx *dev = dvb->adapter.priv;
164  int max_dvb_packet_size;
165 
166  usb_set_interface(dev->udev, 0, dev->dvb_alt);
167  rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
168  if (rc < 0)
169  return rc;
170 
171  max_dvb_packet_size = dev->dvb_max_pkt_size;
172  if (max_dvb_packet_size < 0)
173  return max_dvb_packet_size;
174  dprintk(1, "Using %d buffers each with %d x %d bytes\n",
175  EM28XX_DVB_NUM_BUFS,
176  EM28XX_DVB_MAX_PACKETS,
177  max_dvb_packet_size);
178 
179  return em28xx_init_isoc(dev, EM28XX_DIGITAL_MODE,
180  EM28XX_DVB_MAX_PACKETS, EM28XX_DVB_NUM_BUFS,
181  max_dvb_packet_size, em28xx_dvb_isoc_copy);
182 }
183 
184 static int em28xx_stop_streaming(struct em28xx_dvb *dvb)
185 {
186  struct em28xx *dev = dvb->adapter.priv;
187 
188  em28xx_stop_urbs(dev);
189 
190  em28xx_set_mode(dev, EM28XX_SUSPEND);
191 
192  return 0;
193 }
194 
195 static int em28xx_start_feed(struct dvb_demux_feed *feed)
196 {
197  struct dvb_demux *demux = feed->demux;
198  struct em28xx_dvb *dvb = demux->priv;
199  int rc, ret;
200 
201  if (!demux->dmx.frontend)
202  return -EINVAL;
203 
204  mutex_lock(&dvb->lock);
205  dvb->nfeeds++;
206  rc = dvb->nfeeds;
207 
208  if (dvb->nfeeds == 1) {
209  ret = em28xx_start_streaming(dvb);
210  if (ret < 0)
211  rc = ret;
212  }
213 
214  mutex_unlock(&dvb->lock);
215  return rc;
216 }
217 
218 static int em28xx_stop_feed(struct dvb_demux_feed *feed)
219 {
220  struct dvb_demux *demux = feed->demux;
221  struct em28xx_dvb *dvb = demux->priv;
222  int err = 0;
223 
224  mutex_lock(&dvb->lock);
225  dvb->nfeeds--;
226 
227  if (0 == dvb->nfeeds)
228  err = em28xx_stop_streaming(dvb);
229 
230  mutex_unlock(&dvb->lock);
231  return err;
232 }
233 
234 
235 
236 /* ------------------------------------------------------------------ */
237 static int em28xx_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
238 {
239  struct em28xx *dev = fe->dvb->priv;
240 
241  if (acquire)
242  return em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
243  else
244  return em28xx_set_mode(dev, EM28XX_SUSPEND);
245 }
246 
247 /* ------------------------------------------------------------------ */
248 
249 static struct lgdt330x_config em2880_lgdt3303_dev = {
250  .demod_address = 0x0e,
251  .demod_chip = LGDT3303,
252 };
253 
254 static struct lgdt3305_config em2870_lgdt3304_dev = {
255  .i2c_addr = 0x0e,
256  .demod_chip = LGDT3304,
257  .spectral_inversion = 1,
258  .deny_i2c_rptr = 1,
259  .mpeg_mode = LGDT3305_MPEG_PARALLEL,
260  .tpclk_edge = LGDT3305_TPCLK_FALLING_EDGE,
261  .tpvalid_polarity = LGDT3305_TP_VALID_HIGH,
262  .vsb_if_khz = 3250,
263  .qam_if_khz = 4000,
264 };
265 
266 static struct s921_config sharp_isdbt = {
267  .demod_address = 0x30 >> 1
268 };
269 
270 static struct zl10353_config em28xx_zl10353_with_xc3028 = {
271  .demod_address = (0x1e >> 1),
272  .no_tuner = 1,
273  .parallel_ts = 1,
274  .if2 = 45600,
275 };
276 
277 static struct s5h1409_config em28xx_s5h1409_with_xc3028 = {
278  .demod_address = 0x32 >> 1,
279  .output_mode = S5H1409_PARALLEL_OUTPUT,
280  .gpio = S5H1409_GPIO_OFF,
281  .inversion = S5H1409_INVERSION_OFF,
282  .status_mode = S5H1409_DEMODLOCKING,
283  .mpeg_timing = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK
284 };
285 
286 static struct tda18271_std_map kworld_a340_std_map = {
287  .atsc_6 = { .if_freq = 3250, .agc_mode = 3, .std = 0,
288  .if_lvl = 1, .rfagc_top = 0x37, },
289  .qam_6 = { .if_freq = 4000, .agc_mode = 3, .std = 1,
290  .if_lvl = 1, .rfagc_top = 0x37, },
291 };
292 
293 static struct tda18271_config kworld_a340_config = {
294  .std_map = &kworld_a340_std_map,
295 };
296 
297 static struct zl10353_config em28xx_zl10353_xc3028_no_i2c_gate = {
298  .demod_address = (0x1e >> 1),
299  .no_tuner = 1,
300  .disable_i2c_gate_ctrl = 1,
301  .parallel_ts = 1,
302  .if2 = 45600,
303 };
304 
305 static struct drxd_config em28xx_drxd = {
306  .demod_address = 0x70,
307  .demod_revision = 0xa2,
308  .pll_type = DRXD_PLL_NONE,
309  .clock = 12000,
310  .insert_rs_byte = 1,
311  .IF = 42800000,
312  .disable_i2c_gate_ctrl = 1,
313 };
314 
315 static struct drxk_config terratec_h5_drxk = {
316  .adr = 0x29,
317  .single_master = 1,
318  .no_i2c_bridge = 1,
319  .microcode_name = "dvb-usb-terratec-h5-drxk.fw",
320  .qam_demod_parameter_count = 2,
321  .load_firmware_sync = true,
322 };
323 
324 static struct drxk_config hauppauge_930c_drxk = {
325  .adr = 0x29,
326  .single_master = 1,
327  .no_i2c_bridge = 1,
328  .microcode_name = "dvb-usb-hauppauge-hvr930c-drxk.fw",
329  .chunk_size = 56,
330  .qam_demod_parameter_count = 2,
331  .load_firmware_sync = true,
332 };
333 
334 struct drxk_config terratec_htc_stick_drxk = {
335  .adr = 0x29,
336  .single_master = 1,
337  .no_i2c_bridge = 1,
338  .microcode_name = "dvb-usb-terratec-htc-stick-drxk.fw",
339  .chunk_size = 54,
340  .qam_demod_parameter_count = 2,
341  /* Required for the antenna_gpio to disable LNA. */
342  .antenna_dvbt = true,
343  /* The windows driver uses the same. This will disable LNA. */
344  .antenna_gpio = 0x6,
345  .load_firmware_sync = true,
346 };
347 
348 static struct drxk_config maxmedia_ub425_tc_drxk = {
349  .adr = 0x29,
350  .single_master = 1,
351  .no_i2c_bridge = 1,
352  .load_firmware_sync = true,
353 };
354 
355 static struct drxk_config pctv_520e_drxk = {
356  .adr = 0x29,
357  .single_master = 1,
358  .microcode_name = "dvb-demod-drxk-pctv.fw",
359  .qam_demod_parameter_count = 2,
360  .chunk_size = 58,
361  .antenna_dvbt = true, /* disable LNA */
362  .antenna_gpio = (1 << 2), /* disable LNA */
363  .load_firmware_sync = true,
364 };
365 
366 static int drxk_gate_ctrl(struct dvb_frontend *fe, int enable)
367 {
368  struct em28xx_dvb *dvb = fe->sec_priv;
369  int status;
370 
371  if (!dvb)
372  return -EINVAL;
373 
374  if (enable) {
375  down(&dvb->pll_mutex);
376  status = dvb->gate_ctrl(fe, 1);
377  } else {
378  status = dvb->gate_ctrl(fe, 0);
379  up(&dvb->pll_mutex);
380  }
381  return status;
382 }
383 
384 static void hauppauge_hvr930c_init(struct em28xx *dev)
385 {
386  int i;
387 
388  struct em28xx_reg_seq hauppauge_hvr930c_init[] = {
389  {EM2874_R80_GPIO, 0xff, 0xff, 0x65},
390  {EM2874_R80_GPIO, 0xfb, 0xff, 0x32},
391  {EM2874_R80_GPIO, 0xff, 0xff, 0xb8},
392  { -1, -1, -1, -1},
393  };
394  struct em28xx_reg_seq hauppauge_hvr930c_end[] = {
395  {EM2874_R80_GPIO, 0xef, 0xff, 0x01},
396  {EM2874_R80_GPIO, 0xaf, 0xff, 0x65},
397  {EM2874_R80_GPIO, 0xef, 0xff, 0x76},
398  {EM2874_R80_GPIO, 0xef, 0xff, 0x01},
399  {EM2874_R80_GPIO, 0xcf, 0xff, 0x0b},
400  {EM2874_R80_GPIO, 0xef, 0xff, 0x40},
401 
402  {EM2874_R80_GPIO, 0xcf, 0xff, 0x65},
403  {EM2874_R80_GPIO, 0xef, 0xff, 0x65},
404  {EM2874_R80_GPIO, 0xcf, 0xff, 0x0b},
405  {EM2874_R80_GPIO, 0xef, 0xff, 0x65},
406 
407  { -1, -1, -1, -1},
408  };
409 
410  struct {
411  unsigned char r[4];
412  int len;
413  } regs[] = {
414  {{ 0x06, 0x02, 0x00, 0x31 }, 4},
415  {{ 0x01, 0x02 }, 2},
416  {{ 0x01, 0x02, 0x00, 0xc6 }, 4},
417  {{ 0x01, 0x00 }, 2},
418  {{ 0x01, 0x00, 0xff, 0xaf }, 4},
419  {{ 0x01, 0x00, 0x03, 0xa0 }, 4},
420  {{ 0x01, 0x00 }, 2},
421  {{ 0x01, 0x00, 0x73, 0xaf }, 4},
422  {{ 0x04, 0x00 }, 2},
423  {{ 0x00, 0x04 }, 2},
424  {{ 0x00, 0x04, 0x00, 0x0a }, 4},
425  {{ 0x04, 0x14 }, 2},
426  {{ 0x04, 0x14, 0x00, 0x00 }, 4},
427  };
428 
429  em28xx_gpio_set(dev, hauppauge_hvr930c_init);
430  em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
431  msleep(10);
432  em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
433  msleep(10);
434 
435  dev->i2c_client.addr = 0x82 >> 1;
436 
437  for (i = 0; i < ARRAY_SIZE(regs); i++)
438  i2c_master_send(&dev->i2c_client, regs[i].r, regs[i].len);
439  em28xx_gpio_set(dev, hauppauge_hvr930c_end);
440 
441  msleep(100);
442 
443  em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
444  msleep(30);
445 
446  em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x45);
447  msleep(10);
448 
449 }
450 
451 static void terratec_h5_init(struct em28xx *dev)
452 {
453  int i;
454  struct em28xx_reg_seq terratec_h5_init[] = {
455  {EM28XX_R08_GPIO, 0xff, 0xff, 10},
456  {EM2874_R80_GPIO, 0xf6, 0xff, 100},
457  {EM2874_R80_GPIO, 0xf2, 0xff, 50},
458  {EM2874_R80_GPIO, 0xf6, 0xff, 100},
459  { -1, -1, -1, -1},
460  };
461  struct em28xx_reg_seq terratec_h5_end[] = {
462  {EM2874_R80_GPIO, 0xe6, 0xff, 100},
463  {EM2874_R80_GPIO, 0xa6, 0xff, 50},
464  {EM2874_R80_GPIO, 0xe6, 0xff, 100},
465  { -1, -1, -1, -1},
466  };
467  struct {
468  unsigned char r[4];
469  int len;
470  } regs[] = {
471  {{ 0x06, 0x02, 0x00, 0x31 }, 4},
472  {{ 0x01, 0x02 }, 2},
473  {{ 0x01, 0x02, 0x00, 0xc6 }, 4},
474  {{ 0x01, 0x00 }, 2},
475  {{ 0x01, 0x00, 0xff, 0xaf }, 4},
476  {{ 0x01, 0x00, 0x03, 0xa0 }, 4},
477  {{ 0x01, 0x00 }, 2},
478  {{ 0x01, 0x00, 0x73, 0xaf }, 4},
479  {{ 0x04, 0x00 }, 2},
480  {{ 0x00, 0x04 }, 2},
481  {{ 0x00, 0x04, 0x00, 0x0a }, 4},
482  {{ 0x04, 0x14 }, 2},
483  {{ 0x04, 0x14, 0x00, 0x00 }, 4},
484  };
485 
486  em28xx_gpio_set(dev, terratec_h5_init);
487  em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
488  msleep(10);
489  em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x45);
490  msleep(10);
491 
492  dev->i2c_client.addr = 0x82 >> 1;
493 
494  for (i = 0; i < ARRAY_SIZE(regs); i++)
495  i2c_master_send(&dev->i2c_client, regs[i].r, regs[i].len);
496  em28xx_gpio_set(dev, terratec_h5_end);
497 };
498 
499 static void terratec_htc_stick_init(struct em28xx *dev)
500 {
501  int i;
502 
503  /*
504  * GPIO configuration:
505  * 0xff: unknown (does not affect DVB-T).
506  * 0xf6: DRX-K (demodulator).
507  * 0xe6: unknown (does not affect DVB-T).
508  * 0xb6: unknown (does not affect DVB-T).
509  */
510  struct em28xx_reg_seq terratec_htc_stick_init[] = {
511  {EM28XX_R08_GPIO, 0xff, 0xff, 10},
512  {EM2874_R80_GPIO, 0xf6, 0xff, 100},
513  {EM2874_R80_GPIO, 0xe6, 0xff, 50},
514  {EM2874_R80_GPIO, 0xf6, 0xff, 100},
515  { -1, -1, -1, -1},
516  };
517  struct em28xx_reg_seq terratec_htc_stick_end[] = {
518  {EM2874_R80_GPIO, 0xb6, 0xff, 100},
519  {EM2874_R80_GPIO, 0xf6, 0xff, 50},
520  { -1, -1, -1, -1},
521  };
522 
523  /* Init the analog decoder? */
524  struct {
525  unsigned char r[4];
526  int len;
527  } regs[] = {
528  {{ 0x06, 0x02, 0x00, 0x31 }, 4},
529  {{ 0x01, 0x02 }, 2},
530  {{ 0x01, 0x02, 0x00, 0xc6 }, 4},
531  {{ 0x01, 0x00 }, 2},
532  {{ 0x01, 0x00, 0xff, 0xaf }, 4},
533  };
534 
535  em28xx_gpio_set(dev, terratec_htc_stick_init);
536 
537  em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x40);
538  msleep(10);
539  em28xx_write_reg(dev, EM28XX_R06_I2C_CLK, 0x44);
540  msleep(10);
541 
542  dev->i2c_client.addr = 0x82 >> 1;
543 
544  for (i = 0; i < ARRAY_SIZE(regs); i++)
545  i2c_master_send(&dev->i2c_client, regs[i].r, regs[i].len);
546 
547  em28xx_gpio_set(dev, terratec_htc_stick_end);
548 };
549 
550 static void pctv_520e_init(struct em28xx *dev)
551 {
552  /*
553  * Init AVF4910B analog decoder. Looks like I2C traffic to
554  * digital demodulator and tuner are routed via AVF4910B.
555  */
556  int i;
557  struct {
558  unsigned char r[4];
559  int len;
560  } regs[] = {
561  {{ 0x06, 0x02, 0x00, 0x31 }, 4},
562  {{ 0x01, 0x02 }, 2},
563  {{ 0x01, 0x02, 0x00, 0xc6 }, 4},
564  {{ 0x01, 0x00 }, 2},
565  {{ 0x01, 0x00, 0xff, 0xaf }, 4},
566  {{ 0x01, 0x00, 0x03, 0xa0 }, 4},
567  {{ 0x01, 0x00 }, 2},
568  {{ 0x01, 0x00, 0x73, 0xaf }, 4},
569  };
570 
571  dev->i2c_client.addr = 0x82 >> 1; /* 0x41 */
572 
573  for (i = 0; i < ARRAY_SIZE(regs); i++)
574  i2c_master_send(&dev->i2c_client, regs[i].r, regs[i].len);
575 };
576 
577 static int em28xx_pctv_290e_set_lna(struct dvb_frontend *fe)
578 {
579  struct dtv_frontend_properties *c = &fe->dtv_property_cache;
580  struct em28xx *dev = fe->dvb->priv;
581 #ifdef CONFIG_GPIOLIB
582  struct em28xx_dvb *dvb = dev->dvb;
583  int ret;
584  unsigned long flags;
585 
586  if (c->lna == 1)
587  flags = GPIOF_OUT_INIT_HIGH; /* enable LNA */
588  else
589  flags = GPIOF_OUT_INIT_LOW; /* disable LNA */
590 
591  ret = gpio_request_one(dvb->lna_gpio, flags, NULL);
592  if (ret)
593  em28xx_errdev("gpio request failed %d\n", ret);
594  else
595  gpio_free(dvb->lna_gpio);
596 
597  return ret;
598 #else
599  dev_warn(&dev->udev->dev, "%s: LNA control is disabled (lna=%u)\n",
600  KBUILD_MODNAME, c->lna);
601  return 0;
602 #endif
603 }
604 
605 static int em28xx_mt352_terratec_xs_init(struct dvb_frontend *fe)
606 {
607  /* Values extracted from a USB trace of the Terratec Windows driver */
608  static u8 clock_config[] = { CLOCK_CTL, 0x38, 0x2c };
609  static u8 reset[] = { RESET, 0x80 };
610  static u8 adc_ctl_1_cfg[] = { ADC_CTL_1, 0x40 };
611  static u8 agc_cfg[] = { AGC_TARGET, 0x28, 0xa0 };
612  static u8 input_freq_cfg[] = { INPUT_FREQ_1, 0x31, 0xb8 };
613  static u8 rs_err_cfg[] = { RS_ERR_PER_1, 0x00, 0x4d };
614  static u8 capt_range_cfg[] = { CAPT_RANGE, 0x32 };
615  static u8 trl_nom_cfg[] = { TRL_NOMINAL_RATE_1, 0x64, 0x00 };
616  static u8 tps_given_cfg[] = { TPS_GIVEN_1, 0x40, 0x80, 0x50 };
617  static u8 tuner_go[] = { TUNER_GO, 0x01};
618 
619  mt352_write(fe, clock_config, sizeof(clock_config));
620  udelay(200);
621  mt352_write(fe, reset, sizeof(reset));
622  mt352_write(fe, adc_ctl_1_cfg, sizeof(adc_ctl_1_cfg));
623  mt352_write(fe, agc_cfg, sizeof(agc_cfg));
624  mt352_write(fe, input_freq_cfg, sizeof(input_freq_cfg));
625  mt352_write(fe, rs_err_cfg, sizeof(rs_err_cfg));
626  mt352_write(fe, capt_range_cfg, sizeof(capt_range_cfg));
627  mt352_write(fe, trl_nom_cfg, sizeof(trl_nom_cfg));
628  mt352_write(fe, tps_given_cfg, sizeof(tps_given_cfg));
629  mt352_write(fe, tuner_go, sizeof(tuner_go));
630  return 0;
631 }
632 
633 static struct mt352_config terratec_xs_mt352_cfg = {
634  .demod_address = (0x1e >> 1),
635  .no_tuner = 1,
636  .if2 = 45600,
637  .demod_init = em28xx_mt352_terratec_xs_init,
638 };
639 
640 static struct tda10023_config em28xx_tda10023_config = {
641  .demod_address = 0x0c,
642  .invert = 1,
643 };
644 
645 static struct cxd2820r_config em28xx_cxd2820r_config = {
646  .i2c_address = (0xd8 >> 1),
647  .ts_mode = CXD2820R_TS_SERIAL,
648 };
649 
650 static struct tda18271_config em28xx_cxd2820r_tda18271_config = {
651  .output_opt = TDA18271_OUTPUT_LT_OFF,
652  .gate = TDA18271_GATE_DIGITAL,
653 };
654 
655 static const struct tda10071_config em28xx_tda10071_config = {
656  .i2c_address = 0x55, /* (0xaa >> 1) */
657  .i2c_wr_max = 64,
658  .ts_mode = TDA10071_TS_SERIAL,
659  .spec_inv = 0,
660  .xtal = 40444000, /* 40.444 MHz */
661  .pll_multiplier = 20,
662 };
663 
664 static const struct a8293_config em28xx_a8293_config = {
665  .i2c_addr = 0x08, /* (0x10 >> 1) */
666 };
667 
668 static struct zl10353_config em28xx_zl10353_no_i2c_gate_dev = {
669  .demod_address = (0x1e >> 1),
670  .disable_i2c_gate_ctrl = 1,
671  .no_tuner = 1,
672  .parallel_ts = 1,
673 };
674 static struct qt1010_config em28xx_qt1010_config = {
675  .i2c_address = 0x62
676 
677 };
678 
679 /* ------------------------------------------------------------------ */
680 
681 static int em28xx_attach_xc3028(u8 addr, struct em28xx *dev)
682 {
683  struct dvb_frontend *fe;
684  struct xc2028_config cfg;
685 
686  memset(&cfg, 0, sizeof(cfg));
687  cfg.i2c_adap = &dev->i2c_adap;
688  cfg.i2c_addr = addr;
689 
690  if (!dev->dvb->fe[0]) {
691  em28xx_errdev("/2: dvb frontend not attached. "
692  "Can't attach xc3028\n");
693  return -EINVAL;
694  }
695 
696  fe = dvb_attach(xc2028_attach, dev->dvb->fe[0], &cfg);
697  if (!fe) {
698  em28xx_errdev("/2: xc3028 attach failed\n");
699  dvb_frontend_detach(dev->dvb->fe[0]);
700  dev->dvb->fe[0] = NULL;
701  return -EINVAL;
702  }
703 
704  em28xx_info("%s/2: xc3028 attached\n", dev->name);
705 
706  return 0;
707 }
708 
709 /* ------------------------------------------------------------------ */
710 
711 static int em28xx_register_dvb(struct em28xx_dvb *dvb, struct module *module,
712  struct em28xx *dev, struct device *device)
713 {
714  int result;
715 
716  mutex_init(&dvb->lock);
717 
718  /* register adapter */
719  result = dvb_register_adapter(&dvb->adapter, dev->name, module, device,
720  adapter_nr);
721  if (result < 0) {
722  printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
723  dev->name, result);
724  goto fail_adapter;
725  }
726 
727  /* Ensure all frontends negotiate bus access */
728  dvb->fe[0]->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
729  if (dvb->fe[1])
730  dvb->fe[1]->ops.ts_bus_ctrl = em28xx_dvb_bus_ctrl;
731 
732  dvb->adapter.priv = dev;
733 
734  /* register frontend */
735  result = dvb_register_frontend(&dvb->adapter, dvb->fe[0]);
736  if (result < 0) {
737  printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
738  dev->name, result);
739  goto fail_frontend0;
740  }
741 
742  /* register 2nd frontend */
743  if (dvb->fe[1]) {
744  result = dvb_register_frontend(&dvb->adapter, dvb->fe[1]);
745  if (result < 0) {
746  printk(KERN_WARNING "%s: 2nd dvb_register_frontend failed (errno = %d)\n",
747  dev->name, result);
748  goto fail_frontend1;
749  }
750  }
751 
752  /* register demux stuff */
753  dvb->demux.dmx.capabilities =
754  DMX_TS_FILTERING | DMX_SECTION_FILTERING |
755  DMX_MEMORY_BASED_FILTERING;
756  dvb->demux.priv = dvb;
757  dvb->demux.filternum = 256;
758  dvb->demux.feednum = 256;
759  dvb->demux.start_feed = em28xx_start_feed;
760  dvb->demux.stop_feed = em28xx_stop_feed;
761 
762  result = dvb_dmx_init(&dvb->demux);
763  if (result < 0) {
764  printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
765  dev->name, result);
766  goto fail_dmx;
767  }
768 
769  dvb->dmxdev.filternum = 256;
770  dvb->dmxdev.demux = &dvb->demux.dmx;
771  dvb->dmxdev.capabilities = 0;
772  result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
773  if (result < 0) {
774  printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
775  dev->name, result);
776  goto fail_dmxdev;
777  }
778 
779  dvb->fe_hw.source = DMX_FRONTEND_0;
780  result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
781  if (result < 0) {
782  printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
783  dev->name, result);
784  goto fail_fe_hw;
785  }
786 
787  dvb->fe_mem.source = DMX_MEMORY_FE;
788  result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
789  if (result < 0) {
790  printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
791  dev->name, result);
792  goto fail_fe_mem;
793  }
794 
795  result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
796  if (result < 0) {
797  printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
798  dev->name, result);
799  goto fail_fe_conn;
800  }
801 
802  /* register network adapter */
803  dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
804  return 0;
805 
806 fail_fe_conn:
807  dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
808 fail_fe_mem:
809  dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
810 fail_fe_hw:
811  dvb_dmxdev_release(&dvb->dmxdev);
812 fail_dmxdev:
813  dvb_dmx_release(&dvb->demux);
814 fail_dmx:
815  if (dvb->fe[1])
816  dvb_unregister_frontend(dvb->fe[1]);
817  dvb_unregister_frontend(dvb->fe[0]);
818 fail_frontend1:
819  if (dvb->fe[1])
820  dvb_frontend_detach(dvb->fe[1]);
821 fail_frontend0:
822  dvb_frontend_detach(dvb->fe[0]);
823  dvb_unregister_adapter(&dvb->adapter);
824 fail_adapter:
825  return result;
826 }
827 
828 static void em28xx_unregister_dvb(struct em28xx_dvb *dvb)
829 {
830  dvb_net_release(&dvb->net);
831  dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
832  dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
833  dvb_dmxdev_release(&dvb->dmxdev);
834  dvb_dmx_release(&dvb->demux);
835  if (dvb->fe[1])
836  dvb_unregister_frontend(dvb->fe[1]);
837  dvb_unregister_frontend(dvb->fe[0]);
838  if (dvb->fe[1] && !dvb->dont_attach_fe1)
839  dvb_frontend_detach(dvb->fe[1]);
840  dvb_frontend_detach(dvb->fe[0]);
841  dvb_unregister_adapter(&dvb->adapter);
842 }
843 
844 static int em28xx_dvb_init(struct em28xx *dev)
845 {
846  int result = 0, mfe_shared = 0;
847  struct em28xx_dvb *dvb;
848 
849  if (!dev->board.has_dvb) {
850  /* This device does not support the extension */
851  printk(KERN_INFO "em28xx_dvb: This device does not support the extension\n");
852  return 0;
853  }
854 
855  dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL);
856 
857  if (dvb == NULL) {
858  em28xx_info("em28xx_dvb: memory allocation failed\n");
859  return -ENOMEM;
860  }
861  dev->dvb = dvb;
862  dvb->fe[0] = dvb->fe[1] = NULL;
863 
864  mutex_lock(&dev->lock);
865  em28xx_set_mode(dev, EM28XX_DIGITAL_MODE);
866  /* init frontend */
867  switch (dev->model) {
868  case EM2874_BOARD_LEADERSHIP_ISDBT:
869  dvb->fe[0] = dvb_attach(s921_attach,
870  &sharp_isdbt, &dev->i2c_adap);
871 
872  if (!dvb->fe[0]) {
873  result = -EINVAL;
874  goto out_free;
875  }
876 
877  break;
878  case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850:
879  case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
880  case EM2880_BOARD_PINNACLE_PCTV_HD_PRO:
881  case EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600:
882  dvb->fe[0] = dvb_attach(lgdt330x_attach,
883  &em2880_lgdt3303_dev,
884  &dev->i2c_adap);
885  if (em28xx_attach_xc3028(0x61, dev) < 0) {
886  result = -EINVAL;
887  goto out_free;
888  }
889  break;
890  case EM2880_BOARD_KWORLD_DVB_310U:
891  dvb->fe[0] = dvb_attach(zl10353_attach,
892  &em28xx_zl10353_with_xc3028,
893  &dev->i2c_adap);
894  if (em28xx_attach_xc3028(0x61, dev) < 0) {
895  result = -EINVAL;
896  goto out_free;
897  }
898  break;
899  case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900:
900  case EM2882_BOARD_TERRATEC_HYBRID_XS:
901  case EM2880_BOARD_EMPIRE_DUAL_TV:
902  dvb->fe[0] = dvb_attach(zl10353_attach,
903  &em28xx_zl10353_xc3028_no_i2c_gate,
904  &dev->i2c_adap);
905  if (em28xx_attach_xc3028(0x61, dev) < 0) {
906  result = -EINVAL;
907  goto out_free;
908  }
909  break;
910  case EM2880_BOARD_TERRATEC_HYBRID_XS:
911  case EM2880_BOARD_TERRATEC_HYBRID_XS_FR:
912  case EM2881_BOARD_PINNACLE_HYBRID_PRO:
913  case EM2882_BOARD_DIKOM_DK300:
914  case EM2882_BOARD_KWORLD_VS_DVBT:
915  dvb->fe[0] = dvb_attach(zl10353_attach,
916  &em28xx_zl10353_xc3028_no_i2c_gate,
917  &dev->i2c_adap);
918  if (dvb->fe[0] == NULL) {
919  /* This board could have either a zl10353 or a mt352.
920  If the chip id isn't for zl10353, try mt352 */
921  dvb->fe[0] = dvb_attach(mt352_attach,
922  &terratec_xs_mt352_cfg,
923  &dev->i2c_adap);
924  }
925 
926  if (em28xx_attach_xc3028(0x61, dev) < 0) {
927  result = -EINVAL;
928  goto out_free;
929  }
930  break;
931  case EM2870_BOARD_KWORLD_355U:
932  dvb->fe[0] = dvb_attach(zl10353_attach,
933  &em28xx_zl10353_no_i2c_gate_dev,
934  &dev->i2c_adap);
935  if (dvb->fe[0] != NULL)
936  dvb_attach(qt1010_attach, dvb->fe[0],
937  &dev->i2c_adap, &em28xx_qt1010_config);
938  break;
939  case EM2883_BOARD_KWORLD_HYBRID_330U:
940  case EM2882_BOARD_EVGA_INDTUBE:
941  dvb->fe[0] = dvb_attach(s5h1409_attach,
942  &em28xx_s5h1409_with_xc3028,
943  &dev->i2c_adap);
944  if (em28xx_attach_xc3028(0x61, dev) < 0) {
945  result = -EINVAL;
946  goto out_free;
947  }
948  break;
949  case EM2882_BOARD_KWORLD_ATSC_315U:
950  dvb->fe[0] = dvb_attach(lgdt330x_attach,
951  &em2880_lgdt3303_dev,
952  &dev->i2c_adap);
953  if (dvb->fe[0] != NULL) {
954  if (!dvb_attach(simple_tuner_attach, dvb->fe[0],
955  &dev->i2c_adap, 0x61, TUNER_THOMSON_DTT761X)) {
956  result = -EINVAL;
957  goto out_free;
958  }
959  }
960  break;
961  case EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2:
962  case EM2882_BOARD_PINNACLE_HYBRID_PRO_330E:
963  dvb->fe[0] = dvb_attach(drxd_attach, &em28xx_drxd, NULL,
964  &dev->i2c_adap, &dev->udev->dev);
965  if (em28xx_attach_xc3028(0x61, dev) < 0) {
966  result = -EINVAL;
967  goto out_free;
968  }
969  break;
970  case EM2870_BOARD_REDDO_DVB_C_USB_BOX:
971  /* Philips CU1216L NIM (Philips TDA10023 + Infineon TUA6034) */
972  dvb->fe[0] = dvb_attach(tda10023_attach,
973  &em28xx_tda10023_config,
974  &dev->i2c_adap, 0x48);
975  if (dvb->fe[0]) {
976  if (!dvb_attach(simple_tuner_attach, dvb->fe[0],
977  &dev->i2c_adap, 0x60, TUNER_PHILIPS_CU1216L)) {
978  result = -EINVAL;
979  goto out_free;
980  }
981  }
982  break;
983  case EM2870_BOARD_KWORLD_A340:
984  dvb->fe[0] = dvb_attach(lgdt3305_attach,
985  &em2870_lgdt3304_dev,
986  &dev->i2c_adap);
987  if (dvb->fe[0] != NULL)
988  dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
989  &dev->i2c_adap, &kworld_a340_config);
990  break;
991  case EM28174_BOARD_PCTV_290E:
992  /* set default GPIO0 for LNA, used if GPIOLIB is undefined */
993  dvb->lna_gpio = CXD2820R_GPIO_E | CXD2820R_GPIO_O |
994  CXD2820R_GPIO_L;
995  dvb->fe[0] = dvb_attach(cxd2820r_attach,
996  &em28xx_cxd2820r_config,
997  &dev->i2c_adap,
998  &dvb->lna_gpio);
999  if (dvb->fe[0]) {
1000  /* FE 0 attach tuner */
1001  if (!dvb_attach(tda18271_attach,
1002  dvb->fe[0],
1003  0x60,
1004  &dev->i2c_adap,
1005  &em28xx_cxd2820r_tda18271_config)) {
1006 
1007  dvb_frontend_detach(dvb->fe[0]);
1008  result = -EINVAL;
1009  goto out_free;
1010  }
1011 
1012 #ifdef CONFIG_GPIOLIB
1013  /* enable LNA for DVB-T, DVB-T2 and DVB-C */
1014  result = gpio_request_one(dvb->lna_gpio,
1015  GPIOF_OUT_INIT_LOW, NULL);
1016  if (result)
1017  em28xx_errdev("gpio request failed %d\n",
1018  result);
1019  else
1020  gpio_free(dvb->lna_gpio);
1021 
1022  result = 0; /* continue even set LNA fails */
1023 #endif
1024  dvb->fe[0]->ops.set_lna = em28xx_pctv_290e_set_lna;
1025  }
1026 
1027  break;
1028  case EM2884_BOARD_HAUPPAUGE_WINTV_HVR_930C:
1029  {
1030  struct xc5000_config cfg;
1031  hauppauge_hvr930c_init(dev);
1032 
1033  dvb->fe[0] = dvb_attach(drxk_attach,
1034  &hauppauge_930c_drxk, &dev->i2c_adap);
1035  if (!dvb->fe[0]) {
1036  result = -EINVAL;
1037  goto out_free;
1038  }
1039  /* FIXME: do we need a pll semaphore? */
1040  dvb->fe[0]->sec_priv = dvb;
1041  sema_init(&dvb->pll_mutex, 1);
1042  dvb->gate_ctrl = dvb->fe[0]->ops.i2c_gate_ctrl;
1043  dvb->fe[0]->ops.i2c_gate_ctrl = drxk_gate_ctrl;
1044 
1045  /* Attach xc5000 */
1046  memset(&cfg, 0, sizeof(cfg));
1047  cfg.i2c_address = 0x61;
1048  cfg.if_khz = 4000;
1049 
1050  if (dvb->fe[0]->ops.i2c_gate_ctrl)
1051  dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 1);
1052  if (!dvb_attach(xc5000_attach, dvb->fe[0], &dev->i2c_adap,
1053  &cfg)) {
1054  result = -EINVAL;
1055  goto out_free;
1056  }
1057  if (dvb->fe[0]->ops.i2c_gate_ctrl)
1058  dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 0);
1059 
1060  break;
1061  }
1062  case EM2884_BOARD_TERRATEC_H5:
1063  terratec_h5_init(dev);
1064 
1065  dvb->fe[0] = dvb_attach(drxk_attach, &terratec_h5_drxk, &dev->i2c_adap);
1066  if (!dvb->fe[0]) {
1067  result = -EINVAL;
1068  goto out_free;
1069  }
1070  /* FIXME: do we need a pll semaphore? */
1071  dvb->fe[0]->sec_priv = dvb;
1072  sema_init(&dvb->pll_mutex, 1);
1073  dvb->gate_ctrl = dvb->fe[0]->ops.i2c_gate_ctrl;
1074  dvb->fe[0]->ops.i2c_gate_ctrl = drxk_gate_ctrl;
1075 
1076  /* Attach tda18271 to DVB-C frontend */
1077  if (dvb->fe[0]->ops.i2c_gate_ctrl)
1078  dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 1);
1079  if (!dvb_attach(tda18271c2dd_attach, dvb->fe[0], &dev->i2c_adap, 0x60)) {
1080  result = -EINVAL;
1081  goto out_free;
1082  }
1083  if (dvb->fe[0]->ops.i2c_gate_ctrl)
1084  dvb->fe[0]->ops.i2c_gate_ctrl(dvb->fe[0], 0);
1085 
1086  break;
1087  case EM28174_BOARD_PCTV_460E:
1088  /* attach demod */
1089  dvb->fe[0] = dvb_attach(tda10071_attach,
1090  &em28xx_tda10071_config, &dev->i2c_adap);
1091 
1092  /* attach SEC */
1093  if (dvb->fe[0])
1094  dvb_attach(a8293_attach, dvb->fe[0], &dev->i2c_adap,
1095  &em28xx_a8293_config);
1096  break;
1097  case EM2874_BOARD_MAXMEDIA_UB425_TC:
1098  /* attach demodulator */
1099  dvb->fe[0] = dvb_attach(drxk_attach, &maxmedia_ub425_tc_drxk,
1100  &dev->i2c_adap);
1101 
1102  if (dvb->fe[0]) {
1103  /* disable I2C-gate */
1104  dvb->fe[0]->ops.i2c_gate_ctrl = NULL;
1105 
1106  /* attach tuner */
1107  if (!dvb_attach(tda18271c2dd_attach, dvb->fe[0],
1108  &dev->i2c_adap, 0x60)) {
1109  dvb_frontend_detach(dvb->fe[0]);
1110  result = -EINVAL;
1111  goto out_free;
1112  }
1113  }
1114 
1115  /* TODO: we need drx-3913k firmware in order to support DVB-T */
1116  em28xx_info("MaxMedia UB425-TC: only DVB-C supported by that " \
1117  "driver version\n");
1118 
1119  break;
1120  case EM2884_BOARD_PCTV_510E:
1121  case EM2884_BOARD_PCTV_520E:
1122  pctv_520e_init(dev);
1123 
1124  /* attach demodulator */
1125  dvb->fe[0] = dvb_attach(drxk_attach, &pctv_520e_drxk,
1126  &dev->i2c_adap);
1127 
1128  if (dvb->fe[0]) {
1129  /* attach tuner */
1130  if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1131  &dev->i2c_adap,
1132  &em28xx_cxd2820r_tda18271_config)) {
1133  dvb_frontend_detach(dvb->fe[0]);
1134  result = -EINVAL;
1135  goto out_free;
1136  }
1137  }
1138  break;
1139  case EM2884_BOARD_CINERGY_HTC_STICK:
1140  terratec_htc_stick_init(dev);
1141 
1142  /* attach demodulator */
1143  dvb->fe[0] = dvb_attach(drxk_attach, &terratec_htc_stick_drxk,
1144  &dev->i2c_adap);
1145  if (!dvb->fe[0]) {
1146  result = -EINVAL;
1147  goto out_free;
1148  }
1149 
1150  /* Attach the demodulator. */
1151  if (!dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
1152  &dev->i2c_adap,
1153  &em28xx_cxd2820r_tda18271_config)) {
1154  result = -EINVAL;
1155  goto out_free;
1156  }
1157  break;
1158  default:
1159  em28xx_errdev("/2: The frontend of your DVB/ATSC card"
1160  " isn't supported yet\n");
1161  break;
1162  }
1163  if (NULL == dvb->fe[0]) {
1164  em28xx_errdev("/2: frontend initialization failed\n");
1165  result = -EINVAL;
1166  goto out_free;
1167  }
1168  /* define general-purpose callback pointer */
1169  dvb->fe[0]->callback = em28xx_tuner_callback;
1170  if (dvb->fe[1])
1171  dvb->fe[1]->callback = em28xx_tuner_callback;
1172 
1173  /* register everything */
1174  result = em28xx_register_dvb(dvb, THIS_MODULE, dev, &dev->udev->dev);
1175 
1176  if (result < 0)
1177  goto out_free;
1178 
1179  /* MFE lock */
1180  dvb->adapter.mfe_shared = mfe_shared;
1181 
1182  em28xx_info("Successfully loaded em28xx-dvb\n");
1183 ret:
1184  em28xx_set_mode(dev, EM28XX_SUSPEND);
1185  mutex_unlock(&dev->lock);
1186  return result;
1187 
1188 out_free:
1189  kfree(dvb);
1190  dev->dvb = NULL;
1191  goto ret;
1192 }
1193 
1194 static inline void prevent_sleep(struct dvb_frontend_ops *ops)
1195 {
1196  ops->set_voltage = NULL;
1197  ops->sleep = NULL;
1198  ops->tuner_ops.sleep = NULL;
1199 }
1200 
1201 static int em28xx_dvb_fini(struct em28xx *dev)
1202 {
1203  if (!dev->board.has_dvb) {
1204  /* This device does not support the extension */
1205  return 0;
1206  }
1207 
1208  if (dev->dvb) {
1209  struct em28xx_dvb *dvb = dev->dvb;
1210 
1211  if (dev->state & DEV_DISCONNECTED) {
1212  /* We cannot tell the device to sleep
1213  * once it has been unplugged. */
1214  if (dvb->fe[0])
1215  prevent_sleep(&dvb->fe[0]->ops);
1216  if (dvb->fe[1])
1217  prevent_sleep(&dvb->fe[1]->ops);
1218  }
1219 
1220  em28xx_unregister_dvb(dvb);
1221  kfree(dvb);
1222  dev->dvb = NULL;
1223  }
1224 
1225  return 0;
1226 }
1227 
1228 static struct em28xx_ops dvb_ops = {
1229  .id = EM28XX_DVB,
1230  .name = "Em28xx dvb Extension",
1231  .init = em28xx_dvb_init,
1232  .fini = em28xx_dvb_fini,
1233 };
1234 
1235 static int __init em28xx_dvb_register(void)
1236 {
1237  return em28xx_register_extension(&dvb_ops);
1238 }
1239 
1240 static void __exit em28xx_dvb_unregister(void)
1241 {
1242  em28xx_unregister_extension(&dvb_ops);
1243 }
1244 
1245 module_init(em28xx_dvb_register);
1246 module_exit(em28xx_dvb_unregister);
Generated on Thu Jan 10 2013 13:51:37 for Linux Kernel by   doxygen 1.8.2