diff options
Diffstat (limited to 'v4l/kernel-2.6.tmp/dvb_frontend.c')
| -rw-r--r-- | v4l/kernel-2.6.tmp/dvb_frontend.c | 1241 |
1 files changed, 0 insertions, 1241 deletions
diff --git a/v4l/kernel-2.6.tmp/dvb_frontend.c b/v4l/kernel-2.6.tmp/dvb_frontend.c deleted file mode 100644 index bbefb9c..0000000 --- a/v4l/kernel-2.6.tmp/dvb_frontend.c +++ /dev/null @@ -1,1241 +0,0 @@ -/* - * dvb_frontend.c: DVB frontend tuning interface/thread - * - * - * Copyright (C) 1999-2001 Ralph Metzler - * Marcus Metzler - * Holger Waechtler - * for convergence integrated media GmbH - * - * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * Or, point your browser to http://www.gnu.org/copyleft/gpl.html - */ - -#include <linux/version.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/wait.h> -#include <linux/slab.h> -#include <linux/poll.h> -#include <linux/module.h> -#include <linux/list.h> -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) -#include <linux/suspend.h> -#else -#include <linux/freezer.h> -#endif -#include <linux/jiffies.h> -#include <linux/kthread.h> -#include <asm/processor.h> - -#include "dvb_frontend.h" -#include "dvbdev.h" -#include "compat.h" - -static int dvb_frontend_debug; -static int dvb_shutdown_timeout; -static int dvb_force_auto_inversion; -static int dvb_override_tune_delay; -static int dvb_powerdown_on_sleep = 1; - - -module_param_named(frontend_debug, dvb_frontend_debug, int, 0644); -MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off)."); -module_param(dvb_shutdown_timeout, int, 0644); -MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware"); -module_param(dvb_force_auto_inversion, int, 0644); -MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always"); -module_param(dvb_override_tune_delay, int, 0644); -MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt"); -module_param(dvb_powerdown_on_sleep, int, 0644); -MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)"); - -#define dprintk if (dvb_frontend_debug) printk - -#define FESTATE_IDLE 1 -#define FESTATE_RETUNE 2 -#define FESTATE_TUNING_FAST 4 -#define FESTATE_TUNING_SLOW 8 -#define FESTATE_TUNED 16 -#define FESTATE_ZIGZAG_FAST 32 -#define FESTATE_ZIGZAG_SLOW 64 -#define FESTATE_DISEQC 128 -#define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC) -#define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST) -#define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW) -#define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW) - -#define FE_ALGO_HW 1 -/* - * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. - * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. - * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. - * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. - * FESTATE_TUNED. The frontend has successfully locked on. - * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. - * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. - * FESTATE_DISEQC. A DISEQC command has just been issued. - * FESTATE_WAITFORLOCK. When we're waiting for a lock. - * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. - * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. - * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. - */ - -static DEFINE_MUTEX(frontend_mutex); - -struct dvb_frontend_private { - - /* thread/frontend values */ - struct dvb_device *dvbdev; - struct dvb_frontend_parameters parameters; - struct dvb_fe_events events; - struct semaphore sem; - struct list_head list_head; - wait_queue_head_t wait_queue; - struct task_struct *thread; - unsigned long release_jiffies; - unsigned int exit; - unsigned int wakeup; - fe_status_t status; - unsigned long tune_mode_flags; - unsigned int delay; - unsigned int reinitialise; - int tone; - int voltage; - - /* swzigzag values */ - unsigned int state; - unsigned int bending; - int lnb_drift; - unsigned int inversion; - unsigned int auto_step; - unsigned int auto_sub_step; - unsigned int started_auto_step; - unsigned int min_delay; - unsigned int max_drift; - unsigned int step_size; - int quality; - unsigned int check_wrapped; -}; - -static void dvb_frontend_wakeup(struct dvb_frontend *fe); - -static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - struct dvb_fe_events *events = &fepriv->events; - struct dvb_frontend_event *e; - int wp; - - dprintk ("%s\n", __FUNCTION__); - - if (mutex_lock_interruptible (&events->mtx)) - return; - - wp = (events->eventw + 1) % MAX_EVENT; - - if (wp == events->eventr) { - events->overflow = 1; - events->eventr = (events->eventr + 1) % MAX_EVENT; - } - - e = &events->events[events->eventw]; - - memcpy (&e->parameters, &fepriv->parameters, - sizeof (struct dvb_frontend_parameters)); - - if (status & FE_HAS_LOCK) - if (fe->ops.get_frontend) - fe->ops.get_frontend(fe, &e->parameters); - - events->eventw = wp; - - mutex_unlock(&events->mtx); - - e->status = status; - - wake_up_interruptible (&events->wait_queue); -} - -static int dvb_frontend_get_event(struct dvb_frontend *fe, - struct dvb_frontend_event *event, int flags) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - struct dvb_fe_events *events = &fepriv->events; - - dprintk ("%s\n", __FUNCTION__); - - if (events->overflow) { - events->overflow = 0; - return -EOVERFLOW; - } - - if (events->eventw == events->eventr) { - int ret; - - if (flags & O_NONBLOCK) - return -EWOULDBLOCK; - - up(&fepriv->sem); - - ret = wait_event_interruptible (events->wait_queue, - events->eventw != events->eventr); - - if (down_interruptible (&fepriv->sem)) - return -ERESTARTSYS; - - if (ret < 0) - return ret; - } - - if (mutex_lock_interruptible (&events->mtx)) - return -ERESTARTSYS; - - memcpy (event, &events->events[events->eventr], - sizeof(struct dvb_frontend_event)); - - events->eventr = (events->eventr + 1) % MAX_EVENT; - - mutex_unlock(&events->mtx); - - return 0; -} - -static void dvb_frontend_init(struct dvb_frontend *fe) -{ - dprintk ("DVB: initialising frontend %i (%s)...\n", - fe->dvb->num, - fe->ops.info.name); - - if (fe->ops.init) - fe->ops.init(fe); - if (fe->ops.tuner_ops.init) { - fe->ops.tuner_ops.init(fe); - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 0); - } -} - -void dvb_frontend_reinitialise(struct dvb_frontend *fe) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - fepriv->reinitialise = 1; - dvb_frontend_wakeup(fe); -} -EXPORT_SYMBOL(dvb_frontend_reinitialise); - -static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) -{ - int q2; - - dprintk ("%s\n", __FUNCTION__); - - if (locked) - (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256; - else - (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; - - q2 = fepriv->quality - 128; - q2 *= q2; - - fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128); -} - -/** - * Performs automatic twiddling of frontend parameters. - * - * @param fe The frontend concerned. - * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT - * @returns Number of complete iterations that have been performed. - */ -static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) -{ - int autoinversion; - int ready = 0; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - int original_inversion = fepriv->parameters.inversion; - u32 original_frequency = fepriv->parameters.frequency; - - /* are we using autoinversion? */ - autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && - (fepriv->parameters.inversion == INVERSION_AUTO)); - - /* setup parameters correctly */ - while(!ready) { - /* calculate the lnb_drift */ - fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; - - /* wrap the auto_step if we've exceeded the maximum drift */ - if (fepriv->lnb_drift > fepriv->max_drift) { - fepriv->auto_step = 0; - fepriv->auto_sub_step = 0; - fepriv->lnb_drift = 0; - } - - /* perform inversion and +/- zigzag */ - switch(fepriv->auto_sub_step) { - case 0: - /* try with the current inversion and current drift setting */ - ready = 1; - break; - - case 1: - if (!autoinversion) break; - - fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; - ready = 1; - break; - - case 2: - if (fepriv->lnb_drift == 0) break; - - fepriv->lnb_drift = -fepriv->lnb_drift; - ready = 1; - break; - - case 3: - if (fepriv->lnb_drift == 0) break; - if (!autoinversion) break; - - fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; - fepriv->lnb_drift = -fepriv->lnb_drift; - ready = 1; - break; - - default: - fepriv->auto_step++; - fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ - break; - } - - if (!ready) fepriv->auto_sub_step++; - } - - /* if this attempt would hit where we started, indicate a complete - * iteration has occurred */ - if ((fepriv->auto_step == fepriv->started_auto_step) && - (fepriv->auto_sub_step == 0) && check_wrapped) { - return 1; - } - - dprintk("%s: drift:%i inversion:%i auto_step:%i " - "auto_sub_step:%i started_auto_step:%i\n", - __FUNCTION__, fepriv->lnb_drift, fepriv->inversion, - fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step); - - /* set the frontend itself */ - fepriv->parameters.frequency += fepriv->lnb_drift; - if (autoinversion) - fepriv->parameters.inversion = fepriv->inversion; - if (fe->ops.set_frontend) - fe->ops.set_frontend(fe, &fepriv->parameters); - - fepriv->parameters.frequency = original_frequency; - fepriv->parameters.inversion = original_inversion; - - fepriv->auto_sub_step++; - return 0; -} - -static void dvb_frontend_swzigzag(struct dvb_frontend *fe) -{ - fe_status_t s = 0; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - /* if we've got no parameters, just keep idling */ - if (fepriv->state & FESTATE_IDLE) { - fepriv->delay = 3*HZ; - fepriv->quality = 0; - return; - } - - /* in SCAN mode, we just set the frontend when asked and leave it alone */ - if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { - if (fepriv->state & FESTATE_RETUNE) { - if (fe->ops.set_frontend) - fe->ops.set_frontend(fe, &fepriv->parameters); - fepriv->state = FESTATE_TUNED; - } - fepriv->delay = 3*HZ; - fepriv->quality = 0; - return; - } - - /* get the frontend status */ - if (fepriv->state & FESTATE_RETUNE) { - s = 0; - } else { - if (fe->ops.read_status) - fe->ops.read_status(fe, &s); - if (s != fepriv->status) { - dvb_frontend_add_event(fe, s); - fepriv->status = s; - } - } - - /* if we're not tuned, and we have a lock, move to the TUNED state */ - if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { - dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); - fepriv->state = FESTATE_TUNED; - - /* if we're tuned, then we have determined the correct inversion */ - if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && - (fepriv->parameters.inversion == INVERSION_AUTO)) { - fepriv->parameters.inversion = fepriv->inversion; - } - return; - } - - /* if we are tuned already, check we're still locked */ - if (fepriv->state & FESTATE_TUNED) { - dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); - - /* we're tuned, and the lock is still good... */ - if (s & FE_HAS_LOCK) { - return; - } else { /* if we _WERE_ tuned, but now don't have a lock */ - fepriv->state = FESTATE_ZIGZAG_FAST; - fepriv->started_auto_step = fepriv->auto_step; - fepriv->check_wrapped = 0; - } - } - - /* don't actually do anything if we're in the LOSTLOCK state, - * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ - if ((fepriv->state & FESTATE_LOSTLOCK) && - (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { - dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); - return; - } - - /* don't do anything if we're in the DISEQC state, since this - * might be someone with a motorized dish controlled by DISEQC. - * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ - if (fepriv->state & FESTATE_DISEQC) { - dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); - return; - } - - /* if we're in the RETUNE state, set everything up for a brand - * new scan, keeping the current inversion setting, as the next - * tune is _very_ likely to require the same */ - if (fepriv->state & FESTATE_RETUNE) { - fepriv->lnb_drift = 0; - fepriv->auto_step = 0; - fepriv->auto_sub_step = 0; - fepriv->started_auto_step = 0; - fepriv->check_wrapped = 0; - } - - /* fast zigzag. */ - if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { - fepriv->delay = fepriv->min_delay; - - /* peform a tune */ - if (dvb_frontend_swzigzag_autotune(fe, fepriv->check_wrapped)) { - /* OK, if we've run out of trials at the fast speed. - * Drop back to slow for the _next_ attempt */ - fepriv->state = FESTATE_SEARCHING_SLOW; - fepriv->started_auto_step = fepriv->auto_step; - return; - } - fepriv->check_wrapped = 1; - - /* if we've just retuned, enter the ZIGZAG_FAST state. - * This ensures we cannot return from an - * FE_SET_FRONTEND ioctl before the first frontend tune - * occurs */ - if (fepriv->state & FESTATE_RETUNE) { - fepriv->state = FESTATE_TUNING_FAST; - } - } - - /* slow zigzag */ - if (fepriv->state & FESTATE_SEARCHING_SLOW) { - dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); - - /* Note: don't bother checking for wrapping; we stay in this - * state until we get a lock */ - dvb_frontend_swzigzag_autotune(fe, 0); - } -} - -static int dvb_frontend_is_exiting(struct dvb_frontend *fe) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - if (fepriv->exit) - return 1; - - if (fepriv->dvbdev->writers == 1) - if (time_after(jiffies, fepriv->release_jiffies + - dvb_shutdown_timeout * HZ)) - return 1; - - return 0; -} - -static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - if (fepriv->wakeup) { - fepriv->wakeup = 0; - return 1; - } - return dvb_frontend_is_exiting(fe); -} - -static void dvb_frontend_wakeup(struct dvb_frontend *fe) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - fepriv->wakeup = 1; - wake_up_interruptible(&fepriv->wait_queue); -} - -static int dvb_frontend_thread(void *data) -{ - struct dvb_frontend *fe = data; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - unsigned long timeout; - fe_status_t s; - struct dvb_frontend_parameters *params; - - dprintk("%s\n", __FUNCTION__); - - fepriv->check_wrapped = 0; - fepriv->quality = 0; - fepriv->delay = 3*HZ; - fepriv->status = 0; - fepriv->wakeup = 0; - fepriv->reinitialise = 0; - - dvb_frontend_init(fe); - - set_freezable(); - while (1) { - up(&fepriv->sem); /* is locked when we enter the thread... */ -restart: -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24) - timeout = wait_event_interruptible_timeout(fepriv->wait_queue, - dvb_frontend_should_wakeup(fe) || kthread_should_stop(), - fepriv->delay); -#else - timeout = wait_event_interruptible_timeout(fepriv->wait_queue, - dvb_frontend_should_wakeup(fe) || kthread_should_stop() - || freezing(current), - fepriv->delay); -#endif - - if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { - /* got signal or quitting */ - break; - } - - if (try_to_freeze()) - goto restart; - - if (down_interruptible(&fepriv->sem)) - break; - - if (fepriv->reinitialise) { - dvb_frontend_init(fe); - if (fepriv->tone != -1) { - fe->ops.set_tone(fe, fepriv->tone); - } - if (fepriv->voltage != -1) { - fe->ops.set_voltage(fe, fepriv->voltage); - } - fepriv->reinitialise = 0; - } - - /* do an iteration of the tuning loop */ - if (fe->ops.get_frontend_algo) { - if (fe->ops.get_frontend_algo(fe) == FE_ALGO_HW) { - /* have we been asked to retune? */ - params = NULL; - if (fepriv->state & FESTATE_RETUNE) { - params = &fepriv->parameters; - fepriv->state = FESTATE_TUNED; - } - - fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s); - if (s != fepriv->status) { - dvb_frontend_add_event(fe, s); - fepriv->status = s; - } - } else - dvb_frontend_swzigzag(fe); - } else - dvb_frontend_swzigzag(fe); - } - - if (dvb_powerdown_on_sleep) { - if (fe->ops.set_voltage) - fe->ops.set_voltage(fe, SEC_VOLTAGE_OFF); - if (fe->ops.tuner_ops.sleep) { - fe->ops.tuner_ops.sleep(fe); - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 0); - } - if (fe->ops.sleep) - fe->ops.sleep(fe); - } - - fepriv->thread = NULL; - mb(); - - dvb_frontend_wakeup(fe); - return 0; -} - -static void dvb_frontend_stop(struct dvb_frontend *fe) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - dprintk ("%s\n", __FUNCTION__); - - fepriv->exit = 1; - mb(); - - if (!fepriv->thread) - return; - - kthread_stop(fepriv->thread); - - init_MUTEX (&fepriv->sem); - fepriv->state = FESTATE_IDLE; - - /* paranoia check in case a signal arrived */ - if (fepriv->thread) - printk("dvb_frontend_stop: warning: thread %p won't exit\n", - fepriv->thread); -} - -s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) -{ - return ((curtime.tv_usec < lasttime.tv_usec) ? - 1000000 - lasttime.tv_usec + curtime.tv_usec : - curtime.tv_usec - lasttime.tv_usec); -} -EXPORT_SYMBOL(timeval_usec_diff); - -static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec) -{ - curtime->tv_usec += add_usec; - if (curtime->tv_usec >= 1000000) { - curtime->tv_usec -= 1000000; - curtime->tv_sec++; - } -} - -/* - * Sleep until gettimeofday() > waketime + add_usec - * This needs to be as precise as possible, but as the delay is - * usually between 2ms and 32ms, it is done using a scheduled msleep - * followed by usleep (normally a busy-wait loop) for the remainder - */ -void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec) -{ - struct timeval lasttime; - s32 delta, newdelta; - - timeval_usec_add(waketime, add_usec); - - do_gettimeofday(&lasttime); - delta = timeval_usec_diff(lasttime, *waketime); - if (delta > 2500) { - msleep((delta - 1500) / 1000); - do_gettimeofday(&lasttime); - newdelta = timeval_usec_diff(lasttime, *waketime); - delta = (newdelta > delta) ? 0 : newdelta; - } - if (delta > 0) - udelay(delta); -} -EXPORT_SYMBOL(dvb_frontend_sleep_until); - -static int dvb_frontend_start(struct dvb_frontend *fe) -{ - int ret; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - struct task_struct *fe_thread; - - dprintk ("%s\n", __FUNCTION__); - - if (fepriv->thread) { - if (!fepriv->exit) - return 0; - else - dvb_frontend_stop (fe); - } - - if (signal_pending(current)) - return -EINTR; - if (down_interruptible (&fepriv->sem)) - return -EINTR; - - fepriv->state = FESTATE_IDLE; - fepriv->exit = 0; - fepriv->thread = NULL; - mb(); - - fe_thread = kthread_run(dvb_frontend_thread, fe, - "kdvb-fe-%i", fe->dvb->num); - if (IS_ERR(fe_thread)) { - ret = PTR_ERR(fe_thread); - printk("dvb_frontend_start: failed to start kthread (%d)\n", ret); - up(&fepriv->sem); - return ret; - } - fepriv->thread = fe_thread; - return 0; -} - -static void dvb_frontend_get_frequeny_limits(struct dvb_frontend *fe, - u32 *freq_min, u32 *freq_max) -{ - *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min); - - if (fe->ops.info.frequency_max == 0) - *freq_max = fe->ops.tuner_ops.info.frequency_max; - else if (fe->ops.tuner_ops.info.frequency_max == 0) - *freq_max = fe->ops.info.frequency_max; - else - *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max); - - if (*freq_min == 0 || *freq_max == 0) - printk(KERN_WARNING "DVB: frontend %u frequency limits undefined - fix the driver\n", - fe->dvb->num); -} - -static int dvb_frontend_check_parameters(struct dvb_frontend *fe, - struct dvb_frontend_parameters *parms) -{ - u32 freq_min; - u32 freq_max; - - /* range check: frequency */ - dvb_frontend_get_frequeny_limits(fe, &freq_min, &freq_max); - if ((freq_min && parms->frequency < freq_min) || - (freq_max && parms->frequency > freq_max)) { - printk(KERN_WARNING "DVB: frontend %u frequency %u out of range (%u..%u)\n", - fe->dvb->num, parms->frequency, freq_min, freq_max); - return -EINVAL; - } - - /* range check: symbol rate */ - if (fe->ops.info.type == FE_QPSK) { - if ((fe->ops.info.symbol_rate_min && - parms->u.qpsk.symbol_rate < fe->ops.info.symbol_rate_min) || - (fe->ops.info.symbol_rate_max && - parms->u.qpsk.symbol_rate > fe->ops.info.symbol_rate_max)) { - printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n", - fe->dvb->num, parms->u.qpsk.symbol_rate, - fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max); - return -EINVAL; - } - - } else if (fe->ops.info.type == FE_QAM) { - if ((fe->ops.info.symbol_rate_min && - parms->u.qam.symbol_rate < fe->ops.info.symbol_rate_min) || - (fe->ops.info.symbol_rate_max && - parms->u.qam.symbol_rate > fe->ops.info.symbol_rate_max)) { - printk(KERN_WARNING "DVB: frontend %u symbol rate %u out of range (%u..%u)\n", - fe->dvb->num, parms->u.qam.symbol_rate, - fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max); - return -EINVAL; - } - } - - return 0; -} - -static int dvb_frontend_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, void *parg) -{ - struct dvb_device *dvbdev = file->private_data; - struct dvb_frontend *fe = dvbdev->priv; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - int err = -EOPNOTSUPP; - - dprintk ("%s\n", __FUNCTION__); - - if (fepriv->exit) - return -ENODEV; - - if ((file->f_flags & O_ACCMODE) == O_RDONLY && - (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || - cmd == FE_DISEQC_RECV_SLAVE_REPLY)) - return -EPERM; - - if (down_interruptible (&fepriv->sem)) - return -ERESTARTSYS; - - switch (cmd) { - case FE_GET_INFO: { - struct dvb_frontend_info* info = parg; - memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); - dvb_frontend_get_frequeny_limits(fe, &info->frequency_min, &info->frequency_max); - - /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't - * do it, it is done for it. */ - info->caps |= FE_CAN_INVERSION_AUTO; - err = 0; - break; - } - - case FE_READ_STATUS: { - fe_status_t* status = parg; - - /* if retune was requested but hasn't occured yet, prevent - * that user get signal state from previous tuning */ - if(fepriv->state == FESTATE_RETUNE) { - err=0; - *status = 0; - break; - } - - if (fe->ops.read_status) - err = fe->ops.read_status(fe, status); - break; - } - case FE_READ_BER: - if (fe->ops.read_ber) - err = fe->ops.read_ber(fe, (__u32*) parg); - break; - - case FE_READ_SIGNAL_STRENGTH: - if (fe->ops.read_signal_strength) - err = fe->ops.read_signal_strength(fe, (__u16*) parg); - break; - - case FE_READ_SNR: - if (fe->ops.read_snr) - err = fe->ops.read_snr(fe, (__u16*) parg); - break; - - case FE_READ_UNCORRECTED_BLOCKS: - if (fe->ops.read_ucblocks) - err = fe->ops.read_ucblocks(fe, (__u32*) parg); - break; - - - case FE_DISEQC_RESET_OVERLOAD: - if (fe->ops.diseqc_reset_overload) { - err = fe->ops.diseqc_reset_overload(fe); - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - } - break; - - case FE_DISEQC_SEND_MASTER_CMD: - if (fe->ops.diseqc_send_master_cmd) { - err = fe->ops.diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - } - break; - - case FE_DISEQC_SEND_BURST: - if (fe->ops.diseqc_send_burst) { - err = fe->ops.diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - } - break; - - case FE_SET_TONE: - if (fe->ops.set_tone) { - err = fe->ops.set_tone(fe, (fe_sec_tone_mode_t) parg); - fepriv->tone = (fe_sec_tone_mode_t) parg; - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - } - break; - - case FE_SET_VOLTAGE: - if (fe->ops.set_voltage) { - err = fe->ops.set_voltage(fe, (fe_sec_voltage_t) parg); - fepriv->voltage = (fe_sec_voltage_t) parg; - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - } - break; - - case FE_DISHNETWORK_SEND_LEGACY_CMD: - if (fe->ops.dishnetwork_send_legacy_command) { - err = fe->ops.dishnetwork_send_legacy_command(fe, (unsigned long) parg); - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - } else if (fe->ops.set_voltage) { - /* - * NOTE: This is a fallback condition. Some frontends - * (stv0299 for instance) take longer than 8msec to - * respond to a set_voltage command. Those switches - * need custom routines to switch properly. For all - * other frontends, the following shoule work ok. - * Dish network legacy switches (as used by Dish500) - * are controlled by sending 9-bit command words - * spaced 8msec apart. - * the actual command word is switch/port dependant - * so it is up to the userspace application to send - * the right command. - * The command must always start with a '0' after - * initialization, so parg is 8 bits and does not - * include the initialization or start bit - */ - unsigned long cmd = ((unsigned long) parg) << 1; - struct timeval nexttime; - struct timeval tv[10]; - int i; - u8 last = 1; - if (dvb_frontend_debug) - printk("%s switch command: 0x%04lx\n", __FUNCTION__, cmd); - do_gettimeofday(&nexttime); - if (dvb_frontend_debug) - memcpy(&tv[0], &nexttime, sizeof(struct timeval)); - /* before sending a command, initialize by sending - * a 32ms 18V to the switch - */ - fe->ops.set_voltage(fe, SEC_VOLTAGE_18); - dvb_frontend_sleep_until(&nexttime, 32000); - - for (i = 0; i < 9; i++) { - if (dvb_frontend_debug) - do_gettimeofday(&tv[i + 1]); - if ((cmd & 0x01) != last) { - /* set voltage to (last ? 13V : 18V) */ - fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); - last = (last) ? 0 : 1; - } - cmd = cmd >> 1; - if (i != 8) - dvb_frontend_sleep_until(&nexttime, 8000); - } - if (dvb_frontend_debug) { - printk("%s(%d): switch delay (should be 32k followed by all 8k\n", - __FUNCTION__, fe->dvb->num); - for (i = 1; i < 10; i++) - printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); - } - err = 0; - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - } - break; - - case FE_DISEQC_RECV_SLAVE_REPLY: - if (fe->ops.diseqc_recv_slave_reply) - err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); - break; - - case FE_ENABLE_HIGH_LNB_VOLTAGE: - if (fe->ops.enable_high_lnb_voltage) - err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); - break; - - case FE_SET_FRONTEND: { - struct dvb_frontend_tune_settings fetunesettings; - - if (dvb_frontend_check_parameters(fe, parg) < 0) { - err = -EINVAL; - break; - } - - memcpy (&fepriv->parameters, parg, - sizeof (struct dvb_frontend_parameters)); - - memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); - memcpy(&fetunesettings.parameters, parg, - sizeof (struct dvb_frontend_parameters)); - - /* force auto frequency inversion if requested */ - if (dvb_force_auto_inversion) { - fepriv->parameters.inversion = INVERSION_AUTO; - fetunesettings.parameters.inversion = INVERSION_AUTO; - } - if (fe->ops.info.type == FE_OFDM) { - /* without hierarchical coding code_rate_LP is irrelevant, - * so we tolerate the otherwise invalid FEC_NONE setting */ - if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE && - fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE) - fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO; - } - - /* get frontend-specific tuning settings */ - if (fe->ops.get_tune_settings && (fe->ops.get_tune_settings(fe, &fetunesettings) == 0)) { - fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; - fepriv->max_drift = fetunesettings.max_drift; - fepriv->step_size = fetunesettings.step_size; - } else { - /* default values */ - switch(fe->ops.info.type) { - case FE_QPSK: - fepriv->min_delay = HZ/20; - fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000; - fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000; - break; - - case FE_QAM: - fepriv->min_delay = HZ/20; - fepriv->step_size = 0; /* no zigzag */ - fepriv->max_drift = 0; - break; - - case FE_OFDM: - fepriv->min_delay = HZ/20; - fepriv->step_size = fe->ops.info.frequency_stepsize * 2; - fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; - break; - case FE_ATSC: - fepriv->min_delay = HZ/20; - fepriv->step_size = 0; - fepriv->max_drift = 0; - break; - } - } - if (dvb_override_tune_delay > 0) - fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; - - fepriv->state = FESTATE_RETUNE; - dvb_frontend_wakeup(fe); - dvb_frontend_add_event(fe, 0); - fepriv->status = 0; - err = 0; - break; - } - - case FE_GET_EVENT: - err = dvb_frontend_get_event (fe, parg, file->f_flags); - break; - - case FE_GET_FRONTEND: - if (fe->ops.get_frontend) { - memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters)); - err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg); - } - break; - - case FE_SET_FRONTEND_TUNE_MODE: - fepriv->tune_mode_flags = (unsigned long) parg; - err = 0; - break; - }; - - up (&fepriv->sem); - return err; -} - -static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) -{ - struct dvb_device *dvbdev = file->private_data; - struct dvb_frontend *fe = dvbdev->priv; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - dprintk ("%s\n", __FUNCTION__); - - poll_wait (file, &fepriv->events.wait_queue, wait); - - if (fepriv->events.eventw != fepriv->events.eventr) - return (POLLIN | POLLRDNORM | POLLPRI); - - return 0; -} - -static int dvb_frontend_open(struct inode *inode, struct file *file) -{ - struct dvb_device *dvbdev = file->private_data; - struct dvb_frontend *fe = dvbdev->priv; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - int ret; - - dprintk ("%s\n", __FUNCTION__); - - if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { - if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) - return ret; - } - - if ((ret = dvb_generic_open (inode, file)) < 0) - goto err1; - - if ((file->f_flags & O_ACCMODE) != O_RDONLY) { - /* normal tune mode when opened R/W */ - fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; - fepriv->tone = -1; - fepriv->voltage = -1; - - ret = dvb_frontend_start (fe); - if (ret) - goto err2; - - /* empty event queue */ - fepriv->events.eventr = fepriv->events.eventw = 0; - } - - return ret; - -err2: - dvb_generic_release(inode, file); -err1: - if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) - fe->ops.ts_bus_ctrl(fe, 0); - return ret; -} - -static int dvb_frontend_release(struct inode *inode, struct file *file) -{ - struct dvb_device *dvbdev = file->private_data; - struct dvb_frontend *fe = dvbdev->priv; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - int ret; - - dprintk ("%s\n", __FUNCTION__); - - if ((file->f_flags & O_ACCMODE) != O_RDONLY) - fepriv->release_jiffies = jiffies; - - ret = dvb_generic_release (inode, file); - - if (dvbdev->users == -1) { - if (fepriv->exit == 1) { - fops_put(file->f_op); - file->f_op = NULL; - wake_up(&dvbdev->wait_queue); - } - if (fe->ops.ts_bus_ctrl) - fe->ops.ts_bus_ctrl(fe, 0); - } - - return ret; -} - -static struct file_operations dvb_frontend_fops = { - .owner = THIS_MODULE, - .ioctl = dvb_generic_ioctl, - .poll = dvb_frontend_poll, - .open = dvb_frontend_open, - .release = dvb_frontend_release -}; - -int dvb_register_frontend(struct dvb_adapter* dvb, - struct dvb_frontend* fe) -{ - struct dvb_frontend_private *fepriv; - static const struct dvb_device dvbdev_template = { - .users = ~0, - .writers = 1, - .readers = (~0)-1, - .fops = &dvb_frontend_fops, - .kernel_ioctl = dvb_frontend_ioctl - }; - - dprintk ("%s\n", __FUNCTION__); - - if (mutex_lock_interruptible(&frontend_mutex)) - return -ERESTARTSYS; - - fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); - if (fe->frontend_priv == NULL) { - mutex_unlock(&frontend_mutex); - return -ENOMEM; - } - fepriv = fe->frontend_priv; - - init_MUTEX (&fepriv->sem); - init_waitqueue_head (&fepriv->wait_queue); - init_waitqueue_head (&fepriv->events.wait_queue); - mutex_init(&fepriv->events.mtx); - fe->dvb = dvb; - fepriv->inversion = INVERSION_OFF; - - printk ("DVB: registering frontend %i (%s)...\n", - fe->dvb->num, - fe->ops.info.name); - - dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, - fe, DVB_DEVICE_FRONTEND); - - mutex_unlock(&frontend_mutex); - return 0; -} -EXPORT_SYMBOL(dvb_register_frontend); - -int dvb_unregister_frontend(struct dvb_frontend* fe) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - dprintk ("%s\n", __FUNCTION__); - - mutex_lock(&frontend_mutex); - dvb_frontend_stop (fe); - mutex_unlock(&frontend_mutex); - - if (fepriv->dvbdev->users < -1) - wait_event(fepriv->dvbdev->wait_queue, - fepriv->dvbdev->users==-1); - - mutex_lock(&frontend_mutex); - dvb_unregister_device (fepriv->dvbdev); - - /* fe is invalid now */ - kfree(fepriv); - mutex_unlock(&frontend_mutex); - return 0; -} -EXPORT_SYMBOL(dvb_unregister_frontend); - -#ifdef CONFIG_DVB_CORE_ATTACH -void dvb_frontend_detach(struct dvb_frontend* fe) -{ - void *ptr; - - if (fe->ops.release_sec) { - fe->ops.release_sec(fe); - symbol_put_addr(fe->ops.release_sec); - } - if (fe->ops.tuner_ops.release) { - fe->ops.tuner_ops.release(fe); - symbol_put_addr(fe->ops.tuner_ops.release); - } - if (fe->ops.analog_ops.release) { - fe->ops.analog_ops.release(fe); - symbol_put_addr(fe->ops.analog_ops.release); - } - ptr = (void*)fe->ops.release; - if (ptr) { - fe->ops.release(fe); - symbol_put_addr(ptr); - } -} -#else -void dvb_frontend_detach(struct dvb_frontend* fe) -{ - if (fe->ops.release_sec) - fe->ops.release_sec(fe); - if (fe->ops.tuner_ops.release) - fe->ops.tuner_ops.release(fe); - if (fe->ops.analog_ops.release) - fe->ops.analog_ops.release(fe); - if (fe->ops.release) - fe->ops.release(fe); -} -#endif -EXPORT_SYMBOL(dvb_frontend_detach); |