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, 1241 insertions, 0 deletions
diff --git a/v4l/kernel-2.6.tmp/dvb_frontend.c b/v4l/kernel-2.6.tmp/dvb_frontend.c new file mode 100644 index 0000000..bbefb9c --- /dev/null +++ b/v4l/kernel-2.6.tmp/dvb_frontend.c @@ -0,0 +1,1241 @@ +/* + * 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); |