dvb_frontend.c 50 KB

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  1. /*
  2. * dvb_frontend.c: DVB frontend tuning interface/thread
  3. *
  4. *
  5. * Copyright (C) 1999-2001 Ralph Metzler
  6. * Marcus Metzler
  7. * Holger Waechtler
  8. * for convergence integrated media GmbH
  9. *
  10. * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
  11. *
  12. * This program is free software; you can redistribute it and/or
  13. * modify it under the terms of the GNU General Public License
  14. * as published by the Free Software Foundation; either version 2
  15. * of the License, or (at your option) any later version.
  16. *
  17. * This program is distributed in the hope that it will be useful,
  18. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  20. * GNU General Public License for more details.
  21. *
  22. * You should have received a copy of the GNU General Public License
  23. * along with this program; if not, write to the Free Software
  24. * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25. * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
  26. */
  27. #include <linux/string.h>
  28. #include <linux/kernel.h>
  29. #include <linux/sched.h>
  30. #include <linux/wait.h>
  31. #include <linux/slab.h>
  32. #include <linux/poll.h>
  33. #include <linux/module.h>
  34. #include <linux/list.h>
  35. #include <linux/freezer.h>
  36. #include <linux/jiffies.h>
  37. #include <linux/kthread.h>
  38. #include <asm/processor.h>
  39. #include "dvb_frontend.h"
  40. #include "dvbdev.h"
  41. static int dvb_frontend_debug;
  42. static int dvb_shutdown_timeout;
  43. static int dvb_force_auto_inversion;
  44. static int dvb_override_tune_delay;
  45. static int dvb_powerdown_on_sleep = 1;
  46. module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
  47. MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
  48. module_param(dvb_shutdown_timeout, int, 0644);
  49. MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
  50. module_param(dvb_force_auto_inversion, int, 0644);
  51. MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
  52. module_param(dvb_override_tune_delay, int, 0644);
  53. MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
  54. module_param(dvb_powerdown_on_sleep, int, 0644);
  55. MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
  56. #define dprintk if (dvb_frontend_debug) printk
  57. #define FESTATE_IDLE 1
  58. #define FESTATE_RETUNE 2
  59. #define FESTATE_TUNING_FAST 4
  60. #define FESTATE_TUNING_SLOW 8
  61. #define FESTATE_TUNED 16
  62. #define FESTATE_ZIGZAG_FAST 32
  63. #define FESTATE_ZIGZAG_SLOW 64
  64. #define FESTATE_DISEQC 128
  65. #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
  66. #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
  67. #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
  68. #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
  69. #define FE_ALGO_HW 1
  70. /*
  71. * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
  72. * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
  73. * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
  74. * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
  75. * FESTATE_TUNED. The frontend has successfully locked on.
  76. * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
  77. * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
  78. * FESTATE_DISEQC. A DISEQC command has just been issued.
  79. * FESTATE_WAITFORLOCK. When we're waiting for a lock.
  80. * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
  81. * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
  82. * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
  83. */
  84. static DEFINE_MUTEX(frontend_mutex);
  85. struct dvb_frontend_private {
  86. /* thread/frontend values */
  87. struct dvb_device *dvbdev;
  88. struct dvb_frontend_parameters parameters;
  89. struct dvb_fe_events events;
  90. struct semaphore sem;
  91. struct list_head list_head;
  92. wait_queue_head_t wait_queue;
  93. struct task_struct *thread;
  94. unsigned long release_jiffies;
  95. unsigned int exit;
  96. unsigned int wakeup;
  97. fe_status_t status;
  98. unsigned long tune_mode_flags;
  99. unsigned int delay;
  100. unsigned int reinitialise;
  101. int tone;
  102. int voltage;
  103. /* swzigzag values */
  104. unsigned int state;
  105. unsigned int bending;
  106. int lnb_drift;
  107. unsigned int inversion;
  108. unsigned int auto_step;
  109. unsigned int auto_sub_step;
  110. unsigned int started_auto_step;
  111. unsigned int min_delay;
  112. unsigned int max_drift;
  113. unsigned int step_size;
  114. int quality;
  115. unsigned int check_wrapped;
  116. };
  117. static void dvb_frontend_wakeup(struct dvb_frontend *fe);
  118. static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
  119. {
  120. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  121. struct dvb_fe_events *events = &fepriv->events;
  122. struct dvb_frontend_event *e;
  123. int wp;
  124. dprintk ("%s\n", __func__);
  125. if (mutex_lock_interruptible (&events->mtx))
  126. return;
  127. wp = (events->eventw + 1) % MAX_EVENT;
  128. if (wp == events->eventr) {
  129. events->overflow = 1;
  130. events->eventr = (events->eventr + 1) % MAX_EVENT;
  131. }
  132. e = &events->events[events->eventw];
  133. memcpy (&e->parameters, &fepriv->parameters,
  134. sizeof (struct dvb_frontend_parameters));
  135. if (status & FE_HAS_LOCK)
  136. if (fe->ops.get_frontend)
  137. fe->ops.get_frontend(fe, &e->parameters);
  138. events->eventw = wp;
  139. mutex_unlock(&events->mtx);
  140. e->status = status;
  141. wake_up_interruptible (&events->wait_queue);
  142. }
  143. static int dvb_frontend_get_event(struct dvb_frontend *fe,
  144. struct dvb_frontend_event *event, int flags)
  145. {
  146. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  147. struct dvb_fe_events *events = &fepriv->events;
  148. dprintk ("%s\n", __func__);
  149. if (events->overflow) {
  150. events->overflow = 0;
  151. return -EOVERFLOW;
  152. }
  153. if (events->eventw == events->eventr) {
  154. int ret;
  155. if (flags & O_NONBLOCK)
  156. return -EWOULDBLOCK;
  157. up(&fepriv->sem);
  158. ret = wait_event_interruptible (events->wait_queue,
  159. events->eventw != events->eventr);
  160. if (down_interruptible (&fepriv->sem))
  161. return -ERESTARTSYS;
  162. if (ret < 0)
  163. return ret;
  164. }
  165. if (mutex_lock_interruptible (&events->mtx))
  166. return -ERESTARTSYS;
  167. memcpy (event, &events->events[events->eventr],
  168. sizeof(struct dvb_frontend_event));
  169. events->eventr = (events->eventr + 1) % MAX_EVENT;
  170. mutex_unlock(&events->mtx);
  171. return 0;
  172. }
  173. static void dvb_frontend_init(struct dvb_frontend *fe)
  174. {
  175. dprintk ("DVB: initialising frontend %i (%s)...\n",
  176. fe->dvb->num,
  177. fe->ops.info.name);
  178. if (fe->ops.init)
  179. fe->ops.init(fe);
  180. if (fe->ops.tuner_ops.init) {
  181. fe->ops.tuner_ops.init(fe);
  182. if (fe->ops.i2c_gate_ctrl)
  183. fe->ops.i2c_gate_ctrl(fe, 0);
  184. }
  185. }
  186. void dvb_frontend_reinitialise(struct dvb_frontend *fe)
  187. {
  188. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  189. fepriv->reinitialise = 1;
  190. dvb_frontend_wakeup(fe);
  191. }
  192. EXPORT_SYMBOL(dvb_frontend_reinitialise);
  193. static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
  194. {
  195. int q2;
  196. dprintk ("%s\n", __func__);
  197. if (locked)
  198. (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
  199. else
  200. (fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
  201. q2 = fepriv->quality - 128;
  202. q2 *= q2;
  203. fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
  204. }
  205. /**
  206. * Performs automatic twiddling of frontend parameters.
  207. *
  208. * @param fe The frontend concerned.
  209. * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
  210. * @returns Number of complete iterations that have been performed.
  211. */
  212. static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
  213. {
  214. int autoinversion;
  215. int ready = 0;
  216. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  217. int original_inversion = fepriv->parameters.inversion;
  218. u32 original_frequency = fepriv->parameters.frequency;
  219. /* are we using autoinversion? */
  220. autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
  221. (fepriv->parameters.inversion == INVERSION_AUTO));
  222. /* setup parameters correctly */
  223. while(!ready) {
  224. /* calculate the lnb_drift */
  225. fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
  226. /* wrap the auto_step if we've exceeded the maximum drift */
  227. if (fepriv->lnb_drift > fepriv->max_drift) {
  228. fepriv->auto_step = 0;
  229. fepriv->auto_sub_step = 0;
  230. fepriv->lnb_drift = 0;
  231. }
  232. /* perform inversion and +/- zigzag */
  233. switch(fepriv->auto_sub_step) {
  234. case 0:
  235. /* try with the current inversion and current drift setting */
  236. ready = 1;
  237. break;
  238. case 1:
  239. if (!autoinversion) break;
  240. fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
  241. ready = 1;
  242. break;
  243. case 2:
  244. if (fepriv->lnb_drift == 0) break;
  245. fepriv->lnb_drift = -fepriv->lnb_drift;
  246. ready = 1;
  247. break;
  248. case 3:
  249. if (fepriv->lnb_drift == 0) break;
  250. if (!autoinversion) break;
  251. fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
  252. fepriv->lnb_drift = -fepriv->lnb_drift;
  253. ready = 1;
  254. break;
  255. default:
  256. fepriv->auto_step++;
  257. fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
  258. break;
  259. }
  260. if (!ready) fepriv->auto_sub_step++;
  261. }
  262. /* if this attempt would hit where we started, indicate a complete
  263. * iteration has occurred */
  264. if ((fepriv->auto_step == fepriv->started_auto_step) &&
  265. (fepriv->auto_sub_step == 0) && check_wrapped) {
  266. return 1;
  267. }
  268. dprintk("%s: drift:%i inversion:%i auto_step:%i "
  269. "auto_sub_step:%i started_auto_step:%i\n",
  270. __func__, fepriv->lnb_drift, fepriv->inversion,
  271. fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
  272. /* set the frontend itself */
  273. fepriv->parameters.frequency += fepriv->lnb_drift;
  274. if (autoinversion)
  275. fepriv->parameters.inversion = fepriv->inversion;
  276. if (fe->ops.set_frontend)
  277. fe->ops.set_frontend(fe, &fepriv->parameters);
  278. fepriv->parameters.frequency = original_frequency;
  279. fepriv->parameters.inversion = original_inversion;
  280. fepriv->auto_sub_step++;
  281. return 0;
  282. }
  283. static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
  284. {
  285. fe_status_t s = 0;
  286. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  287. /* if we've got no parameters, just keep idling */
  288. if (fepriv->state & FESTATE_IDLE) {
  289. fepriv->delay = 3*HZ;
  290. fepriv->quality = 0;
  291. return;
  292. }
  293. /* in SCAN mode, we just set the frontend when asked and leave it alone */
  294. if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
  295. if (fepriv->state & FESTATE_RETUNE) {
  296. if (fe->ops.set_frontend)
  297. fe->ops.set_frontend(fe, &fepriv->parameters);
  298. fepriv->state = FESTATE_TUNED;
  299. }
  300. fepriv->delay = 3*HZ;
  301. fepriv->quality = 0;
  302. return;
  303. }
  304. /* get the frontend status */
  305. if (fepriv->state & FESTATE_RETUNE) {
  306. s = 0;
  307. } else {
  308. if (fe->ops.read_status)
  309. fe->ops.read_status(fe, &s);
  310. if (s != fepriv->status) {
  311. dvb_frontend_add_event(fe, s);
  312. fepriv->status = s;
  313. }
  314. }
  315. /* if we're not tuned, and we have a lock, move to the TUNED state */
  316. if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
  317. dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
  318. fepriv->state = FESTATE_TUNED;
  319. /* if we're tuned, then we have determined the correct inversion */
  320. if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) &&
  321. (fepriv->parameters.inversion == INVERSION_AUTO)) {
  322. fepriv->parameters.inversion = fepriv->inversion;
  323. }
  324. return;
  325. }
  326. /* if we are tuned already, check we're still locked */
  327. if (fepriv->state & FESTATE_TUNED) {
  328. dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
  329. /* we're tuned, and the lock is still good... */
  330. if (s & FE_HAS_LOCK) {
  331. return;
  332. } else { /* if we _WERE_ tuned, but now don't have a lock */
  333. fepriv->state = FESTATE_ZIGZAG_FAST;
  334. fepriv->started_auto_step = fepriv->auto_step;
  335. fepriv->check_wrapped = 0;
  336. }
  337. }
  338. /* don't actually do anything if we're in the LOSTLOCK state,
  339. * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
  340. if ((fepriv->state & FESTATE_LOSTLOCK) &&
  341. (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
  342. dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
  343. return;
  344. }
  345. /* don't do anything if we're in the DISEQC state, since this
  346. * might be someone with a motorized dish controlled by DISEQC.
  347. * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
  348. if (fepriv->state & FESTATE_DISEQC) {
  349. dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
  350. return;
  351. }
  352. /* if we're in the RETUNE state, set everything up for a brand
  353. * new scan, keeping the current inversion setting, as the next
  354. * tune is _very_ likely to require the same */
  355. if (fepriv->state & FESTATE_RETUNE) {
  356. fepriv->lnb_drift = 0;
  357. fepriv->auto_step = 0;
  358. fepriv->auto_sub_step = 0;
  359. fepriv->started_auto_step = 0;
  360. fepriv->check_wrapped = 0;
  361. }
  362. /* fast zigzag. */
  363. if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
  364. fepriv->delay = fepriv->min_delay;
  365. /* peform a tune */
  366. if (dvb_frontend_swzigzag_autotune(fe, fepriv->check_wrapped)) {
  367. /* OK, if we've run out of trials at the fast speed.
  368. * Drop back to slow for the _next_ attempt */
  369. fepriv->state = FESTATE_SEARCHING_SLOW;
  370. fepriv->started_auto_step = fepriv->auto_step;
  371. return;
  372. }
  373. fepriv->check_wrapped = 1;
  374. /* if we've just retuned, enter the ZIGZAG_FAST state.
  375. * This ensures we cannot return from an
  376. * FE_SET_FRONTEND ioctl before the first frontend tune
  377. * occurs */
  378. if (fepriv->state & FESTATE_RETUNE) {
  379. fepriv->state = FESTATE_TUNING_FAST;
  380. }
  381. }
  382. /* slow zigzag */
  383. if (fepriv->state & FESTATE_SEARCHING_SLOW) {
  384. dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
  385. /* Note: don't bother checking for wrapping; we stay in this
  386. * state until we get a lock */
  387. dvb_frontend_swzigzag_autotune(fe, 0);
  388. }
  389. }
  390. static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
  391. {
  392. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  393. if (fepriv->exit)
  394. return 1;
  395. if (fepriv->dvbdev->writers == 1)
  396. if (time_after(jiffies, fepriv->release_jiffies +
  397. dvb_shutdown_timeout * HZ))
  398. return 1;
  399. return 0;
  400. }
  401. static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
  402. {
  403. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  404. if (fepriv->wakeup) {
  405. fepriv->wakeup = 0;
  406. return 1;
  407. }
  408. return dvb_frontend_is_exiting(fe);
  409. }
  410. static void dvb_frontend_wakeup(struct dvb_frontend *fe)
  411. {
  412. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  413. fepriv->wakeup = 1;
  414. wake_up_interruptible(&fepriv->wait_queue);
  415. }
  416. static int dvb_frontend_thread(void *data)
  417. {
  418. struct dvb_frontend *fe = data;
  419. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  420. unsigned long timeout;
  421. fe_status_t s;
  422. struct dvb_frontend_parameters *params;
  423. dprintk("%s\n", __func__);
  424. fepriv->check_wrapped = 0;
  425. fepriv->quality = 0;
  426. fepriv->delay = 3*HZ;
  427. fepriv->status = 0;
  428. fepriv->wakeup = 0;
  429. fepriv->reinitialise = 0;
  430. dvb_frontend_init(fe);
  431. set_freezable();
  432. while (1) {
  433. up(&fepriv->sem); /* is locked when we enter the thread... */
  434. restart:
  435. timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
  436. dvb_frontend_should_wakeup(fe) || kthread_should_stop()
  437. || freezing(current),
  438. fepriv->delay);
  439. if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
  440. /* got signal or quitting */
  441. break;
  442. }
  443. if (try_to_freeze())
  444. goto restart;
  445. if (down_interruptible(&fepriv->sem))
  446. break;
  447. if (fepriv->reinitialise) {
  448. dvb_frontend_init(fe);
  449. if (fepriv->tone != -1) {
  450. fe->ops.set_tone(fe, fepriv->tone);
  451. }
  452. if (fepriv->voltage != -1) {
  453. fe->ops.set_voltage(fe, fepriv->voltage);
  454. }
  455. fepriv->reinitialise = 0;
  456. }
  457. /* do an iteration of the tuning loop */
  458. if (fe->ops.get_frontend_algo) {
  459. if (fe->ops.get_frontend_algo(fe) == FE_ALGO_HW) {
  460. /* have we been asked to retune? */
  461. params = NULL;
  462. if (fepriv->state & FESTATE_RETUNE) {
  463. params = &fepriv->parameters;
  464. fepriv->state = FESTATE_TUNED;
  465. }
  466. fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
  467. if (s != fepriv->status) {
  468. dvb_frontend_add_event(fe, s);
  469. fepriv->status = s;
  470. }
  471. } else
  472. dvb_frontend_swzigzag(fe);
  473. } else
  474. dvb_frontend_swzigzag(fe);
  475. }
  476. if (dvb_powerdown_on_sleep) {
  477. if (fe->ops.set_voltage)
  478. fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF);
  479. if (fe->ops.tuner_ops.sleep) {
  480. fe->ops.tuner_ops.sleep(fe);
  481. if (fe->ops.i2c_gate_ctrl)
  482. fe->ops.i2c_gate_ctrl(fe, 0);
  483. }
  484. if (fe->ops.sleep)
  485. fe->ops.sleep(fe);
  486. }
  487. fepriv->thread = NULL;
  488. mb();
  489. dvb_frontend_wakeup(fe);
  490. return 0;
  491. }
  492. static void dvb_frontend_stop(struct dvb_frontend *fe)
  493. {
  494. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  495. dprintk ("%s\n", __func__);
  496. fepriv->exit = 1;
  497. mb();
  498. if (!fepriv->thread)
  499. return;
  500. kthread_stop(fepriv->thread);
  501. init_MUTEX (&fepriv->sem);
  502. fepriv->state = FESTATE_IDLE;
  503. /* paranoia check in case a signal arrived */
  504. if (fepriv->thread)
  505. printk("dvb_frontend_stop: warning: thread %p won't exit\n",
  506. fepriv->thread);
  507. }
  508. s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime)
  509. {
  510. return ((curtime.tv_usec < lasttime.tv_usec) ?
  511. 1000000 - lasttime.tv_usec + curtime.tv_usec :
  512. curtime.tv_usec - lasttime.tv_usec);
  513. }
  514. EXPORT_SYMBOL(timeval_usec_diff);
  515. static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec)
  516. {
  517. curtime->tv_usec += add_usec;
  518. if (curtime->tv_usec >= 1000000) {
  519. curtime->tv_usec -= 1000000;
  520. curtime->tv_sec++;
  521. }
  522. }
  523. /*
  524. * Sleep until gettimeofday() > waketime + add_usec
  525. * This needs to be as precise as possible, but as the delay is
  526. * usually between 2ms and 32ms, it is done using a scheduled msleep
  527. * followed by usleep (normally a busy-wait loop) for the remainder
  528. */
  529. void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec)
  530. {
  531. struct timeval lasttime;
  532. s32 delta, newdelta;
  533. timeval_usec_add(waketime, add_usec);
  534. do_gettimeofday(&lasttime);
  535. delta = timeval_usec_diff(lasttime, *waketime);
  536. if (delta > 2500) {
  537. msleep((delta - 1500) / 1000);
  538. do_gettimeofday(&lasttime);
  539. newdelta = timeval_usec_diff(lasttime, *waketime);
  540. delta = (newdelta > delta) ? 0 : newdelta;
  541. }
  542. if (delta > 0)
  543. udelay(delta);
  544. }
  545. EXPORT_SYMBOL(dvb_frontend_sleep_until);
  546. static int dvb_frontend_start(struct dvb_frontend *fe)
  547. {
  548. int ret;
  549. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  550. struct task_struct *fe_thread;
  551. dprintk ("%s\n", __func__);
  552. if (fepriv->thread) {
  553. if (!fepriv->exit)
  554. return 0;
  555. else
  556. dvb_frontend_stop (fe);
  557. }
  558. if (signal_pending(current))
  559. return -EINTR;
  560. if (down_interruptible (&fepriv->sem))
  561. return -EINTR;
  562. fepriv->state = FESTATE_IDLE;
  563. fepriv->exit = 0;
  564. fepriv->thread = NULL;
  565. mb();
  566. fe_thread = kthread_run(dvb_frontend_thread, fe,
  567. "kdvb-fe-%i", fe->dvb->num);
  568. if (IS_ERR(fe_thread)) {
  569. ret = PTR_ERR(fe_thread);
  570. printk("dvb_frontend_start: failed to start kthread (%d)\n", ret);
  571. up(&fepriv->sem);
  572. return ret;
  573. }
  574. fepriv->thread = fe_thread;
  575. return 0;
  576. }
  577. static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe,
  578. u32 *freq_min, u32 *freq_max)
  579. {
  580. *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min);
  581. if (fe->ops.info.frequency_max == 0)
  582. *freq_max = fe->ops.tuner_ops.info.frequency_max;
  583. else if (fe->ops.tuner_ops.info.frequency_max == 0)
  584. *freq_max = fe->ops.info.frequency_max;
  585. else
  586. *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max);
  587. if (*freq_min == 0 || *freq_max == 0)
  588. printk(KERN_WARNING "DVB: frontend %u frequency limits undefined - fix the driver\n",
  589. fe->dvb->num);
  590. }
  591. static int dvb_frontend_check_parameters(struct dvb_frontend *fe,
  592. struct dvb_frontend_parameters *parms)
  593. {
  594. u32 freq_min;
  595. u32 freq_max;
  596. /* range check: frequency */
  597. dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max);
  598. if ((freq_min && parms->frequency < freq_min) ||
  599. (freq_max && parms->frequency > freq_max)) {
  600. printk(KERN_WARNING "DVB: frontend %u frequency %u out of range (%u..%u)\n",
  601. fe->dvb->num, parms->frequency, freq_min, freq_max);
  602. return -EINVAL;
  603. }
  604. /* range check: symbol rate */
  605. if (fe->ops.info.type == FE_QPSK) {
  606. if ((fe->ops.info.symbol_rate_min &&
  607. parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) ||
  608. (fe->ops.info.symbol_rate_max &&
  609. parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) {
  610. printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n",
  611. fe->dvb->num, parms->u.qpsk.symbol_rate,
  612. fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
  613. return -EINVAL;
  614. }
  615. } else if (fe->ops.info.type == FE_QAM) {
  616. if ((fe->ops.info.symbol_rate_min &&
  617. parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) ||
  618. (fe->ops.info.symbol_rate_max &&
  619. parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) {
  620. printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n",
  621. fe->dvb->num, parms->u.qam.symbol_rate,
  622. fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max);
  623. return -EINVAL;
  624. }
  625. }
  626. return 0;
  627. }
  628. struct dtv_cmds_h dtv_cmds[] = {
  629. [DTV_TUNE] = {
  630. .name = "DTV_TUNE",
  631. .cmd = DTV_TUNE,
  632. .set = 1,
  633. },
  634. [DTV_CLEAR] = {
  635. .name = "DTV_CLEAR",
  636. .cmd = DTV_CLEAR,
  637. .set = 1,
  638. },
  639. /* Set */
  640. [DTV_SET_FREQUENCY] = {
  641. .name = "DTV_SET_FREQUENCY",
  642. .cmd = DTV_SET_FREQUENCY,
  643. .set = 1,
  644. },
  645. [DTV_SET_BANDWIDTH] = {
  646. .name = "DTV_SET_BANDWIDTH",
  647. .cmd = DTV_SET_BANDWIDTH,
  648. .set = 1,
  649. },
  650. [DTV_SET_MODULATION] = {
  651. .name = "DTV_SET_MODULATION",
  652. .cmd = DTV_SET_MODULATION,
  653. .set = 1,
  654. },
  655. [DTV_SET_INVERSION] = {
  656. .name = "DTV_SET_INVERSION",
  657. .cmd = DTV_SET_INVERSION,
  658. .set = 1,
  659. },
  660. [DTV_SET_DISEQC_MASTER] = {
  661. .name = "DTV_SET_DISEQC_MASTER",
  662. .cmd = DTV_SET_DISEQC_MASTER,
  663. .set = 1,
  664. .buffer = 1,
  665. },
  666. [DTV_SET_SYMBOL_RATE] = {
  667. .name = "DTV_SET_SYMBOL_RATE",
  668. .cmd = DTV_SET_SYMBOL_RATE,
  669. .set = 1,
  670. },
  671. [DTV_SET_INNER_FEC] = {
  672. .name = "DTV_SET_INNER_FEC",
  673. .cmd = DTV_SET_INNER_FEC,
  674. .set = 1,
  675. },
  676. [DTV_SET_VOLTAGE] = {
  677. .name = "DTV_SET_VOLTAGE",
  678. .cmd = DTV_SET_VOLTAGE,
  679. .set = 1,
  680. },
  681. [DTV_SET_TONE] = {
  682. .name = "DTV_SET_TONE",
  683. .cmd = DTV_SET_TONE,
  684. .set = 1,
  685. },
  686. [DTV_SET_PILOT] = {
  687. .name = "DTV_SET_PILOT",
  688. .cmd = DTV_SET_PILOT,
  689. .set = 1,
  690. },
  691. [DTV_SET_ROLLOFF] = {
  692. .name = "DTV_SET_ROLLOFF",
  693. .cmd = DTV_SET_ROLLOFF,
  694. .set = 1,
  695. },
  696. [DTV_SET_DELIVERY_SYSTEM] = {
  697. .name = "DTV_SET_DELIVERY_SYSTEM",
  698. .cmd = DTV_SET_DELIVERY_SYSTEM,
  699. .set = 1,
  700. },
  701. [DTV_SET_ISDB_SEGMENT_IDX] = {
  702. .name = "DTV_SET_ISDB_SEGMENT_IDX",
  703. .cmd = DTV_SET_ISDB_SEGMENT_IDX,
  704. .set = 1,
  705. },
  706. [DTV_SET_ISDB_SEGMENT_WIDTH] = {
  707. .name = "DTV_SET_ISDB_SEGMENT_WIDTH",
  708. .cmd = DTV_SET_ISDB_SEGMENT_WIDTH,
  709. .set = 1,
  710. },
  711. /* Get */
  712. [DTV_GET_FREQUENCY] = {
  713. .name = "DTV_GET_FREQUENCY",
  714. .cmd = DTV_GET_FREQUENCY,
  715. .set = 0,
  716. },
  717. [DTV_GET_BANDWIDTH] = {
  718. .name = "DTV_GET_BANDWIDTH",
  719. .cmd = DTV_GET_BANDWIDTH,
  720. .set = 0,
  721. },
  722. [DTV_GET_MODULATION] = {
  723. .name = "DTV_GET_MODULATION",
  724. .cmd = DTV_GET_MODULATION,
  725. .set = 0,
  726. },
  727. [DTV_GET_INVERSION] = {
  728. .name = "DTV_GET_INVERSION",
  729. .cmd = DTV_GET_INVERSION,
  730. .set = 0,
  731. },
  732. [DTV_GET_DISEQC_SLAVE_REPLY] = {
  733. .name = "DTV_GET_DISEQC_SLAVE_REPLY",
  734. .cmd = DTV_GET_DISEQC_SLAVE_REPLY,
  735. .set = 0,
  736. .buffer = 1,
  737. },
  738. [DTV_GET_SYMBOL_RATE] = {
  739. .name = "DTV_GET_SYMBOL_RATE",
  740. .cmd = DTV_GET_SYMBOL_RATE,
  741. .set = 0,
  742. },
  743. [DTV_GET_INNER_FEC] = {
  744. .name = "DTV_GET_INNER_FEC",
  745. .cmd = DTV_GET_INNER_FEC,
  746. .set = 0,
  747. },
  748. [DTV_GET_VOLTAGE] = {
  749. .name = "DTV_GET_VOLTAGE",
  750. .cmd = DTV_GET_VOLTAGE,
  751. .set = 0,
  752. },
  753. [DTV_GET_TONE] = {
  754. .name = "DTV_GET_TONE",
  755. .cmd = DTV_GET_TONE,
  756. .set = 0,
  757. },
  758. [DTV_GET_PILOT] = {
  759. .name = "DTV_GET_PILOT",
  760. .cmd = DTV_GET_PILOT,
  761. .set = 0,
  762. },
  763. [DTV_GET_ROLLOFF] = {
  764. .name = "DTV_GET_ROLLOFF",
  765. .cmd = DTV_GET_ROLLOFF,
  766. .set = 0,
  767. },
  768. [DTV_GET_DELIVERY_SYSTEM] = {
  769. .name = "DTV_GET_DELIVERY_SYSTEM",
  770. .cmd = DTV_GET_DELIVERY_SYSTEM,
  771. .set = 0,
  772. },
  773. [DTV_GET_ISDB_SEGMENT_IDX] = {
  774. .name = "DTV_GET_ISDB_SEGMENT_IDX",
  775. .cmd = DTV_GET_ISDB_SEGMENT_IDX,
  776. .set = 0,
  777. },
  778. [DTV_GET_ISDB_SEGMENT_WIDTH] = {
  779. .name = "DTV_GET_ISDB_SEGMENT_WIDTH",
  780. .cmd = DTV_GET_ISDB_SEGMENT_WIDTH,
  781. .set = 0,
  782. },
  783. [DTV_GET_ISDB_LAYERA_FEC] = {
  784. .name = "DTV_GET_ISDB_LAYERA_FEC",
  785. .cmd = DTV_GET_ISDB_LAYERA_FEC,
  786. .set = 0,
  787. },
  788. [DTV_GET_ISDB_LAYERA_MODULATION] = {
  789. .name = "DTV_GET_ISDB_LAYERA_MODULATION",
  790. .cmd = DTV_GET_ISDB_LAYERA_MODULATION,
  791. .set = 0,
  792. },
  793. [DTV_GET_ISDB_LAYERA_SEGMENT_WIDTH] = {
  794. .name = "DTV_GET_ISDB_LAYERA_SEGMENT_WIDTH",
  795. .cmd = DTV_GET_ISDB_LAYERA_SEGMENT_WIDTH,
  796. .set = 0,
  797. },
  798. [DTV_GET_ISDB_LAYERB_FEC] = {
  799. .name = "DTV_GET_ISDB_LAYERB_FEC",
  800. .cmd = DTV_GET_ISDB_LAYERB_FEC,
  801. .set = 0,
  802. },
  803. [DTV_GET_ISDB_LAYERB_MODULATION] = {
  804. .name = "DTV_GET_ISDB_LAYERB_MODULATION",
  805. .cmd = DTV_GET_ISDB_LAYERB_MODULATION,
  806. .set = 0,
  807. },
  808. [DTV_GET_ISDB_LAYERB_SEGMENT_WIDTH] = {
  809. .name = "DTV_GET_ISDB_LAYERB_SEGMENT_WIDTH",
  810. .cmd = DTV_GET_ISDB_LAYERB_SEGMENT_WIDTH,
  811. .set = 0,
  812. },
  813. [DTV_GET_ISDB_LAYERC_FEC] = {
  814. .name = "DTV_GET_ISDB_LAYERC_FEC",
  815. .cmd = DTV_GET_ISDB_LAYERC_FEC,
  816. .set = 0,
  817. },
  818. [DTV_GET_ISDB_LAYERC_MODULATION] = {
  819. .name = "DTV_GET_ISDB_LAYERC_MODULATION",
  820. .cmd = DTV_GET_ISDB_LAYERC_MODULATION,
  821. .set = 0,
  822. },
  823. [DTV_GET_ISDB_LAYERC_SEGMENT_WIDTH] = {
  824. .name = "DTV_GET_ISDB_LAYERC_SEGMENT_WIDTH",
  825. .cmd = DTV_GET_ISDB_LAYERC_SEGMENT_WIDTH,
  826. .set = 0,
  827. },
  828. };
  829. void dtv_property_dump(struct dtv_property *tvp)
  830. {
  831. int i;
  832. printk("%s() tvp.cmd = 0x%08x (%s)\n"
  833. ,__FUNCTION__
  834. ,tvp->cmd
  835. ,dtv_cmds[ tvp->cmd ].name);
  836. if(dtv_cmds[ tvp->cmd ].buffer) {
  837. printk("%s() tvp.u.buffer.len = 0x%02x\n"
  838. ,__FUNCTION__
  839. ,tvp->u.buffer.len);
  840. for(i = 0; i < tvp->u.buffer.len; i++)
  841. printk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n"
  842. ,__FUNCTION__
  843. ,i
  844. ,tvp->u.buffer.data[i]);
  845. } else
  846. printk("%s() tvp.u.data = 0x%08x\n", __FUNCTION__, tvp->u.data);
  847. }
  848. int is_legacy_delivery_system(fe_delivery_system_t s)
  849. {
  850. if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) ||
  851. (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS))
  852. return 1;
  853. return 0;
  854. }
  855. /* Synchronise the legacy tuning parameters into the cache, so that demodulator
  856. * drivers can use a single set_frontend tuning function, regardless of whether
  857. * it's being used for the legacy or new API, reducing code and complexity.
  858. */
  859. void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parameters *p)
  860. {
  861. struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  862. printk("%s()\n", __FUNCTION__);
  863. c->frequency = p->frequency;
  864. c->inversion = p->inversion;
  865. switch (fe->ops.info.type) {
  866. case FE_QPSK:
  867. c->symbol_rate = p->u.qpsk.symbol_rate;
  868. c->fec_inner = p->u.qpsk.fec_inner;
  869. c->delivery_system = SYS_DVBS;
  870. break;
  871. case FE_QAM:
  872. c->symbol_rate = p->u.qam.symbol_rate;
  873. c->fec_inner = p->u.qam.fec_inner;
  874. c->modulation = p->u.qam.modulation;
  875. c->delivery_system = SYS_DVBC_ANNEX_AC;
  876. break;
  877. case FE_OFDM:
  878. c->bandwidth = p->u.ofdm.bandwidth;
  879. c->code_rate_HP = p->u.ofdm.code_rate_HP;
  880. c->code_rate_LP = p->u.ofdm.code_rate_LP;
  881. c->modulation = p->u.ofdm.constellation;
  882. c->transmission_mode = p->u.ofdm.transmission_mode;
  883. c->guard_interval = p->u.ofdm.guard_interval;
  884. c->hierarchy = p->u.ofdm.hierarchy_information;
  885. c->delivery_system = SYS_DVBT;
  886. break;
  887. case FE_ATSC:
  888. c->modulation = p->u.vsb.modulation;
  889. if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
  890. c->delivery_system = SYS_ATSC;
  891. else
  892. c->delivery_system = SYS_DVBC_ANNEX_B;
  893. break;
  894. }
  895. }
  896. /* Ensure the cached values are set correctly in the frontend
  897. * legacy tuning structures, for the advanced tuning API.
  898. */
  899. void dtv_property_legacy_params_sync(struct dvb_frontend *fe)
  900. {
  901. struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  902. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  903. struct dvb_frontend_parameters *p = &fepriv->parameters;
  904. printk("%s()\n", __FUNCTION__);
  905. p->frequency = c->frequency;
  906. p->inversion = c->inversion;
  907. switch (fe->ops.info.type) {
  908. case FE_QPSK:
  909. printk("%s() Preparing QPSK req\n", __FUNCTION__);
  910. p->u.qpsk.symbol_rate = c->symbol_rate;
  911. p->u.qpsk.fec_inner = c->fec_inner;
  912. c->delivery_system = SYS_DVBS;
  913. break;
  914. case FE_QAM:
  915. printk("%s() Preparing QAM req\n", __FUNCTION__);
  916. p->u.qam.symbol_rate = c->symbol_rate;
  917. p->u.qam.fec_inner = c->fec_inner;
  918. p->u.qam.modulation = c->modulation;
  919. c->delivery_system = SYS_DVBC_ANNEX_AC;
  920. break;
  921. case FE_OFDM:
  922. printk("%s() Preparing OFDM req\n", __FUNCTION__);
  923. p->u.ofdm.bandwidth = c->bandwidth;
  924. p->u.ofdm.code_rate_HP = c->code_rate_HP;
  925. p->u.ofdm.code_rate_LP = c->code_rate_LP;
  926. p->u.ofdm.constellation = c->modulation;
  927. p->u.ofdm.transmission_mode = c->transmission_mode;
  928. p->u.ofdm.guard_interval = c->guard_interval;
  929. p->u.ofdm.hierarchy_information = c->hierarchy;
  930. c->delivery_system = SYS_DVBT;
  931. break;
  932. case FE_ATSC:
  933. printk("%s() Preparing VSB req\n", __FUNCTION__);
  934. p->u.vsb.modulation = c->modulation;
  935. if ((c->modulation == VSB_8) || (c->modulation == VSB_16))
  936. c->delivery_system = SYS_ATSC;
  937. else
  938. c->delivery_system = SYS_DVBC_ANNEX_B;
  939. break;
  940. }
  941. }
  942. /* Ensure the cached values are set correctly in the frontend
  943. * legacy tuning structures, for the legacy tuning API.
  944. */
  945. void dtv_property_adv_params_sync(struct dvb_frontend *fe)
  946. {
  947. struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  948. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  949. struct dvb_frontend_parameters *p = &fepriv->parameters;
  950. printk("%s()\n", __FUNCTION__);
  951. p->frequency = c->frequency;
  952. p->inversion = c->inversion;
  953. switch(c->modulation) {
  954. case _8PSK:
  955. case _16APSK:
  956. case NBC_QPSK:
  957. p->u.qpsk.symbol_rate = c->symbol_rate;
  958. p->u.qpsk.fec_inner = c->fec_inner;
  959. break;
  960. default:
  961. break;
  962. }
  963. if(c->delivery_system == SYS_ISDBT) {
  964. /* Fake out a generic DVB-T request so we pass validation in the ioctl */
  965. p->frequency = c->frequency;
  966. p->inversion = INVERSION_AUTO;
  967. p->u.ofdm.constellation = QAM_AUTO;
  968. p->u.ofdm.code_rate_HP = FEC_AUTO;
  969. p->u.ofdm.code_rate_LP = FEC_AUTO;
  970. p->u.ofdm.bandwidth = BANDWIDTH_AUTO;
  971. p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO;
  972. p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO;
  973. p->u.ofdm.hierarchy_information = HIERARCHY_AUTO;
  974. }
  975. }
  976. void dtv_property_cache_submit(struct dvb_frontend *fe)
  977. {
  978. struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  979. printk("%s()\n", __FUNCTION__);
  980. /* For legacy delivery systems we don't need the delivery_system to
  981. * be specified, but we populate the older structures from the cache
  982. * so we can call set_frontend on older drivers.
  983. */
  984. if(is_legacy_delivery_system(c->delivery_system)) {
  985. printk("%s() legacy, modulation = %d\n", __FUNCTION__, c->modulation);
  986. dtv_property_legacy_params_sync(fe);
  987. } else {
  988. printk("%s() adv, modulation = %d\n", __FUNCTION__, c->modulation);
  989. /* For advanced delivery systems / modulation types ...
  990. * we seed the lecacy dvb_frontend_parameters structure
  991. * so that the sanity checking code later in the IOCTL processing
  992. * can validate our basic frequency ranges, symbolrates, modulation
  993. * etc.
  994. */
  995. dtv_property_adv_params_sync(fe);
  996. }
  997. }
  998. static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
  999. unsigned int cmd, void *parg);
  1000. static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
  1001. unsigned int cmd, void *parg);
  1002. int dtv_property_process(struct dvb_frontend *fe, struct dtv_property *tvp,
  1003. struct inode *inode, struct file *file)
  1004. {
  1005. int r = 0;
  1006. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  1007. printk("%s()\n", __FUNCTION__);
  1008. dtv_property_dump(tvp);
  1009. switch(tvp->cmd) {
  1010. case DTV_CLEAR:
  1011. /* Reset a cache of data specific to the frontend here. This does
  1012. * not effect hardware.
  1013. */
  1014. printk("%s() Flushing property cache\n", __FUNCTION__);
  1015. memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties));
  1016. fe->dtv_property_cache.state = tvp->cmd;
  1017. fe->dtv_property_cache.delivery_system = SYS_UNDEFINED;
  1018. break;
  1019. case DTV_TUNE:
  1020. /* interpret the cache of data, build either a traditional frontend
  1021. * tunerequest so we can pass validation in the FE_SET_FRONTEND
  1022. * ioctl.
  1023. */
  1024. fe->dtv_property_cache.state = tvp->cmd;
  1025. printk("%s() Finalised property cache\n", __FUNCTION__);
  1026. dtv_property_cache_submit(fe);
  1027. r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND,
  1028. &fepriv->parameters);
  1029. break;
  1030. case DTV_SET_FREQUENCY:
  1031. fe->dtv_property_cache.frequency = tvp->u.data;
  1032. break;
  1033. case DTV_GET_FREQUENCY:
  1034. tvp->u.data = fe->dtv_property_cache.frequency;
  1035. break;
  1036. case DTV_SET_MODULATION:
  1037. fe->dtv_property_cache.modulation = tvp->u.data;
  1038. break;
  1039. case DTV_GET_MODULATION:
  1040. tvp->u.data = fe->dtv_property_cache.modulation;
  1041. break;
  1042. case DTV_SET_BANDWIDTH:
  1043. fe->dtv_property_cache.bandwidth = tvp->u.data;
  1044. break;
  1045. case DTV_GET_BANDWIDTH:
  1046. tvp->u.data = fe->dtv_property_cache.bandwidth;
  1047. break;
  1048. case DTV_SET_INVERSION:
  1049. fe->dtv_property_cache.inversion = tvp->u.data;
  1050. break;
  1051. case DTV_GET_INVERSION:
  1052. tvp->u.data = fe->dtv_property_cache.inversion;
  1053. break;
  1054. case DTV_SET_SYMBOL_RATE:
  1055. fe->dtv_property_cache.symbol_rate = tvp->u.data;
  1056. break;
  1057. case DTV_GET_SYMBOL_RATE:
  1058. tvp->u.data = fe->dtv_property_cache.symbol_rate;
  1059. break;
  1060. case DTV_SET_INNER_FEC:
  1061. fe->dtv_property_cache.fec_inner = tvp->u.data;
  1062. break;
  1063. case DTV_GET_INNER_FEC:
  1064. tvp->u.data = fe->dtv_property_cache.fec_inner;
  1065. break;
  1066. case DTV_SET_PILOT:
  1067. fe->dtv_property_cache.pilot = tvp->u.data;
  1068. break;
  1069. case DTV_GET_PILOT:
  1070. tvp->u.data = fe->dtv_property_cache.pilot;
  1071. break;
  1072. case DTV_SET_ROLLOFF:
  1073. fe->dtv_property_cache.rolloff = tvp->u.data;
  1074. break;
  1075. case DTV_GET_ROLLOFF:
  1076. tvp->u.data = fe->dtv_property_cache.rolloff;
  1077. break;
  1078. case DTV_SET_DELIVERY_SYSTEM:
  1079. fe->dtv_property_cache.delivery_system = tvp->u.data;
  1080. break;
  1081. case DTV_GET_DELIVERY_SYSTEM:
  1082. tvp->u.data = fe->dtv_property_cache.delivery_system;
  1083. break;
  1084. /* ISDB-T Support here */
  1085. case DTV_SET_ISDB_SEGMENT_IDX:
  1086. fe->dtv_property_cache.isdb_segment_idx = tvp->u.data;
  1087. break;
  1088. case DTV_GET_ISDB_SEGMENT_IDX:
  1089. tvp->u.data = fe->dtv_property_cache.isdb_segment_idx;
  1090. break;
  1091. case DTV_SET_ISDB_SEGMENT_WIDTH:
  1092. fe->dtv_property_cache.isdb_segment_width = tvp->u.data;
  1093. break;
  1094. case DTV_GET_ISDB_SEGMENT_WIDTH:
  1095. tvp->u.data = fe->dtv_property_cache.isdb_segment_width;
  1096. break;
  1097. case DTV_GET_ISDB_LAYERA_FEC:
  1098. tvp->u.data = fe->dtv_property_cache.isdb_layera_fec;
  1099. break;
  1100. case DTV_GET_ISDB_LAYERA_MODULATION:
  1101. tvp->u.data = fe->dtv_property_cache.isdb_layera_modulation;
  1102. break;
  1103. case DTV_GET_ISDB_LAYERA_SEGMENT_WIDTH:
  1104. tvp->u.data = fe->dtv_property_cache.isdb_layera_segment_width;
  1105. break;
  1106. case DTV_GET_ISDB_LAYERB_FEC:
  1107. tvp->u.data = fe->dtv_property_cache.isdb_layerb_fec;
  1108. break;
  1109. case DTV_GET_ISDB_LAYERB_MODULATION:
  1110. tvp->u.data = fe->dtv_property_cache.isdb_layerb_modulation;
  1111. break;
  1112. case DTV_GET_ISDB_LAYERB_SEGMENT_WIDTH:
  1113. tvp->u.data = fe->dtv_property_cache.isdb_layerb_segment_width;
  1114. break;
  1115. case DTV_GET_ISDB_LAYERC_FEC:
  1116. tvp->u.data = fe->dtv_property_cache.isdb_layerc_fec;
  1117. break;
  1118. case DTV_GET_ISDB_LAYERC_MODULATION:
  1119. tvp->u.data = fe->dtv_property_cache.isdb_layerc_modulation;
  1120. break;
  1121. case DTV_GET_ISDB_LAYERC_SEGMENT_WIDTH:
  1122. tvp->u.data = fe->dtv_property_cache.isdb_layerc_segment_width;
  1123. break;
  1124. case DTV_SET_VOLTAGE:
  1125. fe->dtv_property_cache.voltage = tvp->u.data;
  1126. r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE,
  1127. (void *)fe->dtv_property_cache.voltage);
  1128. break;
  1129. case DTV_GET_VOLTAGE:
  1130. tvp->u.data = fe->dtv_property_cache.voltage;
  1131. break;
  1132. case DTV_SET_TONE:
  1133. fe->dtv_property_cache.sectone = tvp->u.data;
  1134. r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE,
  1135. (void *)fe->dtv_property_cache.sectone);
  1136. break;
  1137. case DTV_GET_TONE:
  1138. tvp->u.data = fe->dtv_property_cache.sectone;
  1139. break;
  1140. }
  1141. return r;
  1142. }
  1143. static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
  1144. unsigned int cmd, void *parg)
  1145. {
  1146. struct dvb_device *dvbdev = file->private_data;
  1147. struct dvb_frontend *fe = dvbdev->priv;
  1148. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  1149. int err = -EOPNOTSUPP;
  1150. dprintk ("%s\n", __func__);
  1151. if (fepriv->exit)
  1152. return -ENODEV;
  1153. if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
  1154. (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
  1155. cmd == FE_DISEQC_RECV_SLAVE_REPLY))
  1156. return -EPERM;
  1157. if (down_interruptible (&fepriv->sem))
  1158. return -ERESTARTSYS;
  1159. if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY))
  1160. err = dvb_frontend_ioctl_properties(inode, file, cmd, parg);
  1161. else
  1162. err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg);
  1163. up(&fepriv->sem);
  1164. return err;
  1165. }
  1166. static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file,
  1167. unsigned int cmd, void *parg)
  1168. {
  1169. struct dvb_device *dvbdev = file->private_data;
  1170. struct dvb_frontend *fe = dvbdev->priv;
  1171. int err = -EOPNOTSUPP;
  1172. struct dtv_properties *tvps = NULL;
  1173. struct dtv_property *tvp = NULL;
  1174. int i;
  1175. dprintk("%s\n", __func__);
  1176. if(cmd == FE_SET_PROPERTY) {
  1177. printk("%s() FE_SET_PROPERTY\n", __FUNCTION__);
  1178. tvps = (struct dtv_properties __user *)parg;
  1179. printk("%s() properties.num = %d\n", __FUNCTION__, tvps->num);
  1180. printk("%s() properties.props = %p\n", __FUNCTION__, tvps->props);
  1181. /* Put an arbitrary limit on the number of messages that can
  1182. * be sent at once */
  1183. if (tvps->num > DTV_IOCTL_MAX_MSGS)
  1184. return -EINVAL;
  1185. tvp = (struct dtv_property *) kmalloc(tvps->num *
  1186. sizeof(struct dtv_property), GFP_KERNEL);
  1187. if (!tvp) {
  1188. err = -ENOMEM;
  1189. goto out;
  1190. }
  1191. if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) {
  1192. err = -EFAULT;
  1193. goto out;
  1194. }
  1195. for (i = 0; i < tvps->num; i++)
  1196. dtv_property_process(fe, tvp + i, inode, file);
  1197. if(fe->dtv_property_cache.state == DTV_TUNE) {
  1198. printk("%s() Property cache is full, tuning\n", __FUNCTION__);
  1199. }
  1200. err = 0;
  1201. }
  1202. out:
  1203. kfree(tvp);
  1204. return err;
  1205. }
  1206. static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file,
  1207. unsigned int cmd, void *parg)
  1208. {
  1209. struct dvb_device *dvbdev = file->private_data;
  1210. struct dvb_frontend *fe = dvbdev->priv;
  1211. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  1212. int err = -EOPNOTSUPP;
  1213. switch (cmd) {
  1214. case FE_GET_INFO: {
  1215. struct dvb_frontend_info* info = parg;
  1216. memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info));
  1217. dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max);
  1218. /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
  1219. * do it, it is done for it. */
  1220. info->caps |= FE_CAN_INVERSION_AUTO;
  1221. err = 0;
  1222. break;
  1223. }
  1224. case FE_READ_STATUS: {
  1225. fe_status_t* status = parg;
  1226. /* if retune was requested but hasn't occured yet, prevent
  1227. * that user get signal state from previous tuning */
  1228. if(fepriv->state == FESTATE_RETUNE) {
  1229. err=0;
  1230. *status = 0;
  1231. break;
  1232. }
  1233. if (fe->ops.read_status)
  1234. err = fe->ops.read_status(fe, status);
  1235. break;
  1236. }
  1237. case FE_READ_BER:
  1238. if (fe->ops.read_ber)
  1239. err = fe->ops.read_ber(fe, (__u32*) parg);
  1240. break;
  1241. case FE_READ_SIGNAL_STRENGTH:
  1242. if (fe->ops.read_signal_strength)
  1243. err = fe->ops.read_signal_strength(fe, (__u16*) parg);
  1244. break;
  1245. case FE_READ_SNR:
  1246. if (fe->ops.read_snr)
  1247. err = fe->ops.read_snr(fe, (__u16*) parg);
  1248. break;
  1249. case FE_READ_UNCORRECTED_BLOCKS:
  1250. if (fe->ops.read_ucblocks)
  1251. err = fe->ops.read_ucblocks(fe, (__u32*) parg);
  1252. break;
  1253. case FE_DISEQC_RESET_OVERLOAD:
  1254. if (fe->ops.diseqc_reset_overload) {
  1255. err = fe->ops.diseqc_reset_overload(fe);
  1256. fepriv->state = FESTATE_DISEQC;
  1257. fepriv->status = 0;
  1258. }
  1259. break;
  1260. case FE_DISEQC_SEND_MASTER_CMD:
  1261. if (fe->ops.diseqc_send_master_cmd) {
  1262. err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
  1263. fepriv->state = FESTATE_DISEQC;
  1264. fepriv->status = 0;
  1265. }
  1266. break;
  1267. case FE_DISEQC_SEND_BURST:
  1268. if (fe->ops.diseqc_send_burst) {
  1269. err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
  1270. fepriv->state = FESTATE_DISEQC;
  1271. fepriv->status = 0;
  1272. }
  1273. break;
  1274. case FE_SET_TONE:
  1275. if (fe->ops.set_tone) {
  1276. err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg);
  1277. fepriv->tone = (fe_sec_tone_mode_t) parg;
  1278. fepriv->state = FESTATE_DISEQC;
  1279. fepriv->status = 0;
  1280. }
  1281. break;
  1282. case FE_SET_VOLTAGE:
  1283. if (fe->ops.set_voltage) {
  1284. err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg);
  1285. fepriv->voltage = (fe_sec_voltage_t) parg;
  1286. fepriv->state = FESTATE_DISEQC;
  1287. fepriv->status = 0;
  1288. }
  1289. break;
  1290. case FE_DISHNETWORK_SEND_LEGACY_CMD:
  1291. if (fe->ops.dishnetwork_send_legacy_command) {
  1292. err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg);
  1293. fepriv->state = FESTATE_DISEQC;
  1294. fepriv->status = 0;
  1295. } else if (fe->ops.set_voltage) {
  1296. /*
  1297. * NOTE: This is a fallback condition. Some frontends
  1298. * (stv0299 for instance) take longer than 8msec to
  1299. * respond to a set_voltage command. Those switches
  1300. * need custom routines to switch properly. For all
  1301. * other frontends, the following shoule work ok.
  1302. * Dish network legacy switches (as used by Dish500)
  1303. * are controlled by sending 9-bit command words
  1304. * spaced 8msec apart.
  1305. * the actual command word is switch/port dependant
  1306. * so it is up to the userspace application to send
  1307. * the right command.
  1308. * The command must always start with a '0' after
  1309. * initialization, so parg is 8 bits and does not
  1310. * include the initialization or start bit
  1311. */
  1312. unsigned long swcmd = ((unsigned long) parg) << 1;
  1313. struct timeval nexttime;
  1314. struct timeval tv[10];
  1315. int i;
  1316. u8 last = 1;
  1317. if (dvb_frontend_debug)
  1318. printk("%s switch command: 0x%04lx\n", __func__, swcmd);
  1319. do_gettimeofday(&nexttime);
  1320. if (dvb_frontend_debug)
  1321. memcpy(&tv[0], &nexttime, sizeof(struct timeval));
  1322. /* before sending a command, initialize by sending
  1323. * a 32ms 18V to the switch
  1324. */
  1325. fe->ops.set_voltage(fe, SEC_VOLTAGE_18);
  1326. dvb_frontend_sleep_until(&nexttime, 32000);
  1327. for (i = 0; i < 9; i++) {
  1328. if (dvb_frontend_debug)
  1329. do_gettimeofday(&tv[i + 1]);
  1330. if ((swcmd & 0x01) != last) {
  1331. /* set voltage to (last ? 13V : 18V) */
  1332. fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
  1333. last = (last) ? 0 : 1;
  1334. }
  1335. swcmd = swcmd >> 1;
  1336. if (i != 8)
  1337. dvb_frontend_sleep_until(&nexttime, 8000);
  1338. }
  1339. if (dvb_frontend_debug) {
  1340. printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
  1341. __func__, fe->dvb->num);
  1342. for (i = 1; i < 10; i++)
  1343. printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
  1344. }
  1345. err = 0;
  1346. fepriv->state = FESTATE_DISEQC;
  1347. fepriv->status = 0;
  1348. }
  1349. break;
  1350. case FE_DISEQC_RECV_SLAVE_REPLY:
  1351. if (fe->ops.diseqc_recv_slave_reply)
  1352. err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
  1353. break;
  1354. case FE_ENABLE_HIGH_LNB_VOLTAGE:
  1355. if (fe->ops.enable_high_lnb_voltage)
  1356. err = fe->ops.enable_high_lnb_voltage(fe, (long) parg);
  1357. break;
  1358. case FE_SET_FRONTEND: {
  1359. struct dvb_frontend_tune_settings fetunesettings;
  1360. dtv_property_cache_sync(fe, &fepriv->parameters);
  1361. if(fe->dtv_property_cache.state == DTV_TUNE) {
  1362. if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) {
  1363. err = -EINVAL;
  1364. break;
  1365. }
  1366. } else {
  1367. if (dvb_frontend_check_parameters(fe, parg) < 0) {
  1368. err = -EINVAL;
  1369. break;
  1370. }
  1371. memcpy (&fepriv->parameters, parg,
  1372. sizeof (struct dvb_frontend_parameters));
  1373. }
  1374. memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
  1375. memcpy(&fetunesettings.parameters, parg,
  1376. sizeof (struct dvb_frontend_parameters));
  1377. /* force auto frequency inversion if requested */
  1378. if (dvb_force_auto_inversion) {
  1379. fepriv->parameters.inversion = INVERSION_AUTO;
  1380. fetunesettings.parameters.inversion = INVERSION_AUTO;
  1381. }
  1382. if (fe->ops.info.type == FE_OFDM) {
  1383. /* without hierarchical coding code_rate_LP is irrelevant,
  1384. * so we tolerate the otherwise invalid FEC_NONE setting */
  1385. if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
  1386. fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
  1387. fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
  1388. }
  1389. /* get frontend-specific tuning settings */
  1390. if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) {
  1391. fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
  1392. fepriv->max_drift = fetunesettings.max_drift;
  1393. fepriv->step_size = fetunesettings.step_size;
  1394. } else {
  1395. /* default values */
  1396. switch(fe->ops.info.type) {
  1397. case FE_QPSK:
  1398. fepriv->min_delay = HZ/20;
  1399. fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
  1400. fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
  1401. break;
  1402. case FE_QAM:
  1403. fepriv->min_delay = HZ/20;
  1404. fepriv->step_size = 0; /* no zigzag */
  1405. fepriv->max_drift = 0;
  1406. break;
  1407. case FE_OFDM:
  1408. fepriv->min_delay = HZ/20;
  1409. fepriv->step_size = fe->ops.info.frequency_stepsize * 2;
  1410. fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
  1411. break;
  1412. case FE_ATSC:
  1413. fepriv->min_delay = HZ/20;
  1414. fepriv->step_size = 0;
  1415. fepriv->max_drift = 0;
  1416. break;
  1417. }
  1418. }
  1419. if (dvb_override_tune_delay > 0)
  1420. fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
  1421. fepriv->state = FESTATE_RETUNE;
  1422. dvb_frontend_wakeup(fe);
  1423. dvb_frontend_add_event(fe, 0);
  1424. fepriv->status = 0;
  1425. err = 0;
  1426. break;
  1427. }
  1428. case FE_GET_EVENT:
  1429. err = dvb_frontend_get_event (fe, parg, file->f_flags);
  1430. break;
  1431. case FE_GET_FRONTEND:
  1432. if (fe->ops.get_frontend) {
  1433. memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
  1434. err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
  1435. }
  1436. break;
  1437. case FE_SET_FRONTEND_TUNE_MODE:
  1438. fepriv->tune_mode_flags = (unsigned long) parg;
  1439. err = 0;
  1440. break;
  1441. };
  1442. return err;
  1443. }
  1444. static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
  1445. {
  1446. struct dvb_device *dvbdev = file->private_data;
  1447. struct dvb_frontend *fe = dvbdev->priv;
  1448. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  1449. dprintk ("%s\n", __func__);
  1450. poll_wait (file, &fepriv->events.wait_queue, wait);
  1451. if (fepriv->events.eventw != fepriv->events.eventr)
  1452. return (POLLIN | POLLRDNORM | POLLPRI);
  1453. return 0;
  1454. }
  1455. static int dvb_frontend_open(struct inode *inode, struct file *file)
  1456. {
  1457. struct dvb_device *dvbdev = file->private_data;
  1458. struct dvb_frontend *fe = dvbdev->priv;
  1459. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  1460. int ret;
  1461. dprintk ("%s\n", __func__);
  1462. if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) {
  1463. if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0)
  1464. return ret;
  1465. }
  1466. if ((ret = dvb_generic_open (inode, file)) < 0)
  1467. goto err1;
  1468. if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
  1469. /* normal tune mode when opened R/W */
  1470. fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
  1471. fepriv->tone = -1;
  1472. fepriv->voltage = -1;
  1473. ret = dvb_frontend_start (fe);
  1474. if (ret)
  1475. goto err2;
  1476. /* empty event queue */
  1477. fepriv->events.eventr = fepriv->events.eventw = 0;
  1478. }
  1479. return ret;
  1480. err2:
  1481. dvb_generic_release(inode, file);
  1482. err1:
  1483. if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl)
  1484. fe->ops.ts_bus_ctrl(fe, 0);
  1485. return ret;
  1486. }
  1487. static int dvb_frontend_release(struct inode *inode, struct file *file)
  1488. {
  1489. struct dvb_device *dvbdev = file->private_data;
  1490. struct dvb_frontend *fe = dvbdev->priv;
  1491. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  1492. int ret;
  1493. dprintk ("%s\n", __func__);
  1494. if ((file->f_flags & O_ACCMODE) != O_RDONLY)
  1495. fepriv->release_jiffies = jiffies;
  1496. ret = dvb_generic_release (inode, file);
  1497. if (dvbdev->users == -1) {
  1498. if (fepriv->exit == 1) {
  1499. fops_put(file->f_op);
  1500. file->f_op = NULL;
  1501. wake_up(&dvbdev->wait_queue);
  1502. }
  1503. if (fe->ops.ts_bus_ctrl)
  1504. fe->ops.ts_bus_ctrl(fe, 0);
  1505. }
  1506. return ret;
  1507. }
  1508. static struct file_operations dvb_frontend_fops = {
  1509. .owner = THIS_MODULE,
  1510. .ioctl = dvb_generic_ioctl,
  1511. .poll = dvb_frontend_poll,
  1512. .open = dvb_frontend_open,
  1513. .release = dvb_frontend_release
  1514. };
  1515. int dvb_register_frontend(struct dvb_adapter* dvb,
  1516. struct dvb_frontend* fe)
  1517. {
  1518. struct dvb_frontend_private *fepriv;
  1519. static const struct dvb_device dvbdev_template = {
  1520. .users = ~0,
  1521. .writers = 1,
  1522. .readers = (~0)-1,
  1523. .fops = &dvb_frontend_fops,
  1524. .kernel_ioctl = dvb_frontend_ioctl
  1525. };
  1526. dprintk ("%s\n", __func__);
  1527. if (mutex_lock_interruptible(&frontend_mutex))
  1528. return -ERESTARTSYS;
  1529. fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
  1530. if (fe->frontend_priv == NULL) {
  1531. mutex_unlock(&frontend_mutex);
  1532. return -ENOMEM;
  1533. }
  1534. fepriv = fe->frontend_priv;
  1535. init_MUTEX (&fepriv->sem);
  1536. init_waitqueue_head (&fepriv->wait_queue);
  1537. init_waitqueue_head (&fepriv->events.wait_queue);
  1538. mutex_init(&fepriv->events.mtx);
  1539. fe->dvb = dvb;
  1540. fepriv->inversion = INVERSION_OFF;
  1541. printk ("DVB: registering frontend %i (%s)...\n",
  1542. fe->dvb->num,
  1543. fe->ops.info.name);
  1544. dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
  1545. fe, DVB_DEVICE_FRONTEND);
  1546. mutex_unlock(&frontend_mutex);
  1547. return 0;
  1548. }
  1549. EXPORT_SYMBOL(dvb_register_frontend);
  1550. int dvb_unregister_frontend(struct dvb_frontend* fe)
  1551. {
  1552. struct dvb_frontend_private *fepriv = fe->frontend_priv;
  1553. dprintk ("%s\n", __func__);
  1554. mutex_lock(&frontend_mutex);
  1555. dvb_frontend_stop (fe);
  1556. mutex_unlock(&frontend_mutex);
  1557. if (fepriv->dvbdev->users < -1)
  1558. wait_event(fepriv->dvbdev->wait_queue,
  1559. fepriv->dvbdev->users==-1);
  1560. mutex_lock(&frontend_mutex);
  1561. dvb_unregister_device (fepriv->dvbdev);
  1562. /* fe is invalid now */
  1563. kfree(fepriv);
  1564. mutex_unlock(&frontend_mutex);
  1565. return 0;
  1566. }
  1567. EXPORT_SYMBOL(dvb_unregister_frontend);
  1568. #ifdef CONFIG_MEDIA_ATTACH
  1569. void dvb_frontend_detach(struct dvb_frontend* fe)
  1570. {
  1571. void *ptr;
  1572. if (fe->ops.release_sec) {
  1573. fe->ops.release_sec(fe);
  1574. symbol_put_addr(fe->ops.release_sec);
  1575. }
  1576. if (fe->ops.tuner_ops.release) {
  1577. fe->ops.tuner_ops.release(fe);
  1578. symbol_put_addr(fe->ops.tuner_ops.release);
  1579. }
  1580. if (fe->ops.analog_ops.release) {
  1581. fe->ops.analog_ops.release(fe);
  1582. symbol_put_addr(fe->ops.analog_ops.release);
  1583. }
  1584. ptr = (void*)fe->ops.release;
  1585. if (ptr) {
  1586. fe->ops.release(fe);
  1587. symbol_put_addr(ptr);
  1588. }
  1589. }
  1590. #else
  1591. void dvb_frontend_detach(struct dvb_frontend* fe)
  1592. {
  1593. if (fe->ops.release_sec)
  1594. fe->ops.release_sec(fe);
  1595. if (fe->ops.tuner_ops.release)
  1596. fe->ops.tuner_ops.release(fe);
  1597. if (fe->ops.analog_ops.release)
  1598. fe->ops.analog_ops.release(fe);
  1599. if (fe->ops.release)
  1600. fe->ops.release(fe);
  1601. }
  1602. #endif
  1603. EXPORT_SYMBOL(dvb_frontend_detach);