diff options
Diffstat (limited to 'drivers/media/dvb/dvb-core/dvb_frontend.c')
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvb_frontend.c | 1921 |
1 files changed, 1921 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c new file mode 100644 index 0000000..7a421e9 --- /dev/null +++ b/drivers/media/dvb/dvb-core/dvb_frontend.c @@ -0,0 +1,1921 @@ +/* + * 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/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> +#include <linux/freezer.h> +#include <linux/jiffies.h> +#include <linux/kthread.h> +#include <asm/processor.h> + +#include "dvb_frontend.h" +#include "dvbdev.h" +#include <linux/dvb/version.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; +static int dvb_mfe_wait_time = 5; + +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)"); +module_param(dvb_mfe_wait_time, int, 0644); +MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)"); + +#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", __func__); + + 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", __func__); + + 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 adapter %i frontend %i (%s)...\n", + fe->dvb->num, + fe->id, + fe->ops.info.name); + + if (fe->ops.init) + fe->ops.init(fe); + if (fe->ops.tuner_ops.init) { + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + 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", __func__); + + 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", + __func__, 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", __func__); + + 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: + timeout = wait_event_interruptible_timeout(fepriv->wait_queue, + dvb_frontend_should_wakeup(fe) || kthread_should_stop() + || freezing(current), + fepriv->delay); + + 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) { + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + 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", __func__); + + 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", __func__); + + 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-ad-%i-fe-%i", fe->dvb->num,fe->id); + 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: adapter %i frontend %u frequency limits undefined - fix the driver\n", + fe->dvb->num,fe->id); +} + +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: adapter %i frontend %i frequency %u out of range (%u..%u)\n", + fe->dvb->num, fe->id, 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: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n", + fe->dvb->num, fe->id, 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: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n", + fe->dvb->num, fe->id, parms->u.qam.symbol_rate, + fe->ops.info.symbol_rate_min, fe->ops.info.symbol_rate_max); + return -EINVAL; + } + } + + return 0; +} + +struct dtv_cmds_h dtv_cmds[] = { + [DTV_TUNE] = { + .name = "DTV_TUNE", + .cmd = DTV_TUNE, + .set = 1, + }, + [DTV_CLEAR] = { + .name = "DTV_CLEAR", + .cmd = DTV_CLEAR, + .set = 1, + }, + + /* Set */ + [DTV_FREQUENCY] = { + .name = "DTV_FREQUENCY", + .cmd = DTV_FREQUENCY, + .set = 1, + }, + [DTV_BANDWIDTH_HZ] = { + .name = "DTV_BANDWIDTH_HZ", + .cmd = DTV_BANDWIDTH_HZ, + .set = 1, + }, + [DTV_MODULATION] = { + .name = "DTV_MODULATION", + .cmd = DTV_MODULATION, + .set = 1, + }, + [DTV_INVERSION] = { + .name = "DTV_INVERSION", + .cmd = DTV_INVERSION, + .set = 1, + }, + [DTV_DISEQC_MASTER] = { + .name = "DTV_DISEQC_MASTER", + .cmd = DTV_DISEQC_MASTER, + .set = 1, + .buffer = 1, + }, + [DTV_SYMBOL_RATE] = { + .name = "DTV_SYMBOL_RATE", + .cmd = DTV_SYMBOL_RATE, + .set = 1, + }, + [DTV_INNER_FEC] = { + .name = "DTV_INNER_FEC", + .cmd = DTV_INNER_FEC, + .set = 1, + }, + [DTV_VOLTAGE] = { + .name = "DTV_VOLTAGE", + .cmd = DTV_VOLTAGE, + .set = 1, + }, + [DTV_TONE] = { + .name = "DTV_TONE", + .cmd = DTV_TONE, + .set = 1, + }, + [DTV_PILOT] = { + .name = "DTV_PILOT", + .cmd = DTV_PILOT, + .set = 1, + }, + [DTV_ROLLOFF] = { + .name = "DTV_ROLLOFF", + .cmd = DTV_ROLLOFF, + .set = 1, + }, + [DTV_DELIVERY_SYSTEM] = { + .name = "DTV_DELIVERY_SYSTEM", + .cmd = DTV_DELIVERY_SYSTEM, + .set = 1, + }, + [DTV_HIERARCHY] = { + .name = "DTV_HIERARCHY", + .cmd = DTV_HIERARCHY, + .set = 1, + }, + [DTV_CODE_RATE_HP] = { + .name = "DTV_CODE_RATE_HP", + .cmd = DTV_CODE_RATE_HP, + .set = 1, + }, + [DTV_CODE_RATE_LP] = { + .name = "DTV_CODE_RATE_LP", + .cmd = DTV_CODE_RATE_LP, + .set = 1, + }, + [DTV_GUARD_INTERVAL] = { + .name = "DTV_GUARD_INTERVAL", + .cmd = DTV_GUARD_INTERVAL, + .set = 1, + }, + [DTV_TRANSMISSION_MODE] = { + .name = "DTV_TRANSMISSION_MODE", + .cmd = DTV_TRANSMISSION_MODE, + .set = 1, + }, + /* Get */ + [DTV_DISEQC_SLAVE_REPLY] = { + .name = "DTV_DISEQC_SLAVE_REPLY", + .cmd = DTV_DISEQC_SLAVE_REPLY, + .set = 0, + .buffer = 1, + }, + [DTV_API_VERSION] = { + .name = "DTV_API_VERSION", + .cmd = DTV_API_VERSION, + .set = 0, + }, + [DTV_CODE_RATE_HP] = { + .name = "DTV_CODE_RATE_HP", + .cmd = DTV_CODE_RATE_HP, + .set = 0, + }, + [DTV_CODE_RATE_LP] = { + .name = "DTV_CODE_RATE_LP", + .cmd = DTV_CODE_RATE_LP, + .set = 0, + }, + [DTV_GUARD_INTERVAL] = { + .name = "DTV_GUARD_INTERVAL", + .cmd = DTV_GUARD_INTERVAL, + .set = 0, + }, + [DTV_TRANSMISSION_MODE] = { + .name = "DTV_TRANSMISSION_MODE", + .cmd = DTV_TRANSMISSION_MODE, + .set = 0, + }, + [DTV_HIERARCHY] = { + .name = "DTV_HIERARCHY", + .cmd = DTV_HIERARCHY, + .set = 0, + }, +}; + +void dtv_property_dump(struct dtv_property *tvp) +{ + int i; + + if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) { + printk(KERN_WARNING "%s: tvp.cmd = 0x%08x undefined\n", + __func__, tvp->cmd); + return; + } + + dprintk("%s() tvp.cmd = 0x%08x (%s)\n" + ,__func__ + ,tvp->cmd + ,dtv_cmds[ tvp->cmd ].name); + + if(dtv_cmds[ tvp->cmd ].buffer) { + + dprintk("%s() tvp.u.buffer.len = 0x%02x\n" + ,__func__ + ,tvp->u.buffer.len); + + for(i = 0; i < tvp->u.buffer.len; i++) + dprintk("%s() tvp.u.buffer.data[0x%02x] = 0x%02x\n" + ,__func__ + ,i + ,tvp->u.buffer.data[i]); + + } else + dprintk("%s() tvp.u.data = 0x%08x\n", __func__, tvp->u.data); +} + +int is_legacy_delivery_system(fe_delivery_system_t s) +{ + if((s == SYS_UNDEFINED) || (s == SYS_DVBC_ANNEX_AC) || + (s == SYS_DVBC_ANNEX_B) || (s == SYS_DVBT) || (s == SYS_DVBS) || + (s == SYS_ATSC)) + return 1; + + return 0; +} + +/* Synchronise the legacy tuning parameters into the cache, so that demodulator + * drivers can use a single set_frontend tuning function, regardless of whether + * it's being used for the legacy or new API, reducing code and complexity. + */ +void dtv_property_cache_sync(struct dvb_frontend *fe, struct dvb_frontend_parameters *p) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + c->frequency = p->frequency; + c->inversion = p->inversion; + + switch (fe->ops.info.type) { + case FE_QPSK: + c->modulation = QPSK; /* implied for DVB-S in legacy API */ + c->rolloff = ROLLOFF_35;/* implied for DVB-S */ + c->symbol_rate = p->u.qpsk.symbol_rate; + c->fec_inner = p->u.qpsk.fec_inner; + c->delivery_system = SYS_DVBS; + break; + case FE_QAM: + c->symbol_rate = p->u.qam.symbol_rate; + c->fec_inner = p->u.qam.fec_inner; + c->modulation = p->u.qam.modulation; + c->delivery_system = SYS_DVBC_ANNEX_AC; + break; + case FE_OFDM: + if (p->u.ofdm.bandwidth == BANDWIDTH_6_MHZ) + c->bandwidth_hz = 6000000; + else if (p->u.ofdm.bandwidth == BANDWIDTH_7_MHZ) + c->bandwidth_hz = 7000000; + else if (p->u.ofdm.bandwidth == BANDWIDTH_8_MHZ) + c->bandwidth_hz = 8000000; + else + /* Including BANDWIDTH_AUTO */ + c->bandwidth_hz = 0; + c->code_rate_HP = p->u.ofdm.code_rate_HP; + c->code_rate_LP = p->u.ofdm.code_rate_LP; + c->modulation = p->u.ofdm.constellation; + c->transmission_mode = p->u.ofdm.transmission_mode; + c->guard_interval = p->u.ofdm.guard_interval; + c->hierarchy = p->u.ofdm.hierarchy_information; + c->delivery_system = SYS_DVBT; + break; + case FE_ATSC: + c->modulation = p->u.vsb.modulation; + if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) + c->delivery_system = SYS_ATSC; + else + c->delivery_system = SYS_DVBC_ANNEX_B; + break; + } +} + +/* Ensure the cached values are set correctly in the frontend + * legacy tuning structures, for the advanced tuning API. + */ +void dtv_property_legacy_params_sync(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct dvb_frontend_private *fepriv = fe->frontend_priv; + struct dvb_frontend_parameters *p = &fepriv->parameters; + + p->frequency = c->frequency; + p->inversion = c->inversion; + + switch (fe->ops.info.type) { + case FE_QPSK: + dprintk("%s() Preparing QPSK req\n", __func__); + p->u.qpsk.symbol_rate = c->symbol_rate; + p->u.qpsk.fec_inner = c->fec_inner; + c->delivery_system = SYS_DVBS; + break; + case FE_QAM: + dprintk("%s() Preparing QAM req\n", __func__); + p->u.qam.symbol_rate = c->symbol_rate; + p->u.qam.fec_inner = c->fec_inner; + p->u.qam.modulation = c->modulation; + c->delivery_system = SYS_DVBC_ANNEX_AC; + break; + case FE_OFDM: + dprintk("%s() Preparing OFDM req\n", __func__); + if (c->bandwidth_hz == 6000000) + p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; + else if (c->bandwidth_hz == 7000000) + p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; + else if (c->bandwidth_hz == 8000000) + p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; + else + p->u.ofdm.bandwidth = BANDWIDTH_AUTO; + p->u.ofdm.code_rate_HP = c->code_rate_HP; + p->u.ofdm.code_rate_LP = c->code_rate_LP; + p->u.ofdm.constellation = c->modulation; + p->u.ofdm.transmission_mode = c->transmission_mode; + p->u.ofdm.guard_interval = c->guard_interval; + p->u.ofdm.hierarchy_information = c->hierarchy; + c->delivery_system = SYS_DVBT; + break; + case FE_ATSC: + dprintk("%s() Preparing VSB req\n", __func__); + p->u.vsb.modulation = c->modulation; + if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) + c->delivery_system = SYS_ATSC; + else + c->delivery_system = SYS_DVBC_ANNEX_B; + break; + } +} + +/* Ensure the cached values are set correctly in the frontend + * legacy tuning structures, for the legacy tuning API. + */ +void dtv_property_adv_params_sync(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct dvb_frontend_private *fepriv = fe->frontend_priv; + struct dvb_frontend_parameters *p = &fepriv->parameters; + + p->frequency = c->frequency; + p->inversion = c->inversion; + + switch(c->modulation) { + case PSK_8: + case APSK_16: + case APSK_32: + case QPSK: + p->u.qpsk.symbol_rate = c->symbol_rate; + p->u.qpsk.fec_inner = c->fec_inner; + break; + default: + break; + } + + if(c->delivery_system == SYS_ISDBT) { + /* Fake out a generic DVB-T request so we pass validation in the ioctl */ + p->frequency = c->frequency; + p->inversion = INVERSION_AUTO; + p->u.ofdm.constellation = QAM_AUTO; + p->u.ofdm.code_rate_HP = FEC_AUTO; + p->u.ofdm.code_rate_LP = FEC_AUTO; + p->u.ofdm.bandwidth = BANDWIDTH_AUTO; + p->u.ofdm.transmission_mode = TRANSMISSION_MODE_AUTO; + p->u.ofdm.guard_interval = GUARD_INTERVAL_AUTO; + p->u.ofdm.hierarchy_information = HIERARCHY_AUTO; + } +} + +void dtv_property_cache_submit(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + /* For legacy delivery systems we don't need the delivery_system to + * be specified, but we populate the older structures from the cache + * so we can call set_frontend on older drivers. + */ + if(is_legacy_delivery_system(c->delivery_system)) { + + dprintk("%s() legacy, modulation = %d\n", __func__, c->modulation); + dtv_property_legacy_params_sync(fe); + + } else { + dprintk("%s() adv, modulation = %d\n", __func__, c->modulation); + + /* For advanced delivery systems / modulation types ... + * we seed the lecacy dvb_frontend_parameters structure + * so that the sanity checking code later in the IOCTL processing + * can validate our basic frequency ranges, symbolrates, modulation + * etc. + */ + dtv_property_adv_params_sync(fe); + } +} + +static int dvb_frontend_ioctl_legacy(struct inode *inode, struct file *file, + unsigned int cmd, void *parg); +static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file, + unsigned int cmd, void *parg); + +int dtv_property_process_get(struct dvb_frontend *fe, struct dtv_property *tvp, + struct inode *inode, struct file *file) +{ + int r = 0; + + dtv_property_dump(tvp); + + /* Allow the frontend to validate incoming properties */ + if (fe->ops.get_property) + r = fe->ops.get_property(fe, tvp); + + if (r < 0) + return r; + + switch(tvp->cmd) { + case DTV_FREQUENCY: + tvp->u.data = fe->dtv_property_cache.frequency; + break; + case DTV_MODULATION: + tvp->u.data = fe->dtv_property_cache.modulation; + break; + case DTV_BANDWIDTH_HZ: + tvp->u.data = fe->dtv_property_cache.bandwidth_hz; + break; + case DTV_INVERSION: + tvp->u.data = fe->dtv_property_cache.inversion; + break; + case DTV_SYMBOL_RATE: + tvp->u.data = fe->dtv_property_cache.symbol_rate; + break; + case DTV_INNER_FEC: + tvp->u.data = fe->dtv_property_cache.fec_inner; + break; + case DTV_PILOT: + tvp->u.data = fe->dtv_property_cache.pilot; + break; + case DTV_ROLLOFF: + tvp->u.data = fe->dtv_property_cache.rolloff; + break; + case DTV_DELIVERY_SYSTEM: + tvp->u.data = fe->dtv_property_cache.delivery_system; + break; + case DTV_VOLTAGE: + tvp->u.data = fe->dtv_property_cache.voltage; + break; + case DTV_TONE: + tvp->u.data = fe->dtv_property_cache.sectone; + break; + case DTV_API_VERSION: + tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR; + break; + case DTV_CODE_RATE_HP: + tvp->u.data = fe->dtv_property_cache.code_rate_HP; + break; + case DTV_CODE_RATE_LP: + tvp->u.data = fe->dtv_property_cache.code_rate_LP; + break; + case DTV_GUARD_INTERVAL: + tvp->u.data = fe->dtv_property_cache.guard_interval; + break; + case DTV_TRANSMISSION_MODE: + tvp->u.data = fe->dtv_property_cache.transmission_mode; + break; + case DTV_HIERARCHY: + tvp->u.data = fe->dtv_property_cache.hierarchy; + break; + default: + r = -1; + } + + return r; +} + +int dtv_property_process_set(struct dvb_frontend *fe, struct dtv_property *tvp, + struct inode *inode, struct file *file) +{ + int r = 0; + struct dvb_frontend_private *fepriv = fe->frontend_priv; + dtv_property_dump(tvp); + + /* Allow the frontend to validate incoming properties */ + if (fe->ops.set_property) + r = fe->ops.set_property(fe, tvp); + + if (r < 0) + return r; + + switch(tvp->cmd) { + case DTV_CLEAR: + /* Reset a cache of data specific to the frontend here. This does + * not effect hardware. + */ + dprintk("%s() Flushing property cache\n", __func__); + memset(&fe->dtv_property_cache, 0, sizeof(struct dtv_frontend_properties)); + fe->dtv_property_cache.state = tvp->cmd; + fe->dtv_property_cache.delivery_system = SYS_UNDEFINED; + break; + case DTV_TUNE: + /* interpret the cache of data, build either a traditional frontend + * tunerequest so we can pass validation in the FE_SET_FRONTEND + * ioctl. + */ + fe->dtv_property_cache.state = tvp->cmd; + dprintk("%s() Finalised property cache\n", __func__); + dtv_property_cache_submit(fe); + + r |= dvb_frontend_ioctl_legacy(inode, file, FE_SET_FRONTEND, + &fepriv->parameters); + break; + case DTV_FREQUENCY: + fe->dtv_property_cache.frequency = tvp->u.data; + break; + case DTV_MODULATION: + fe->dtv_property_cache.modulation = tvp->u.data; + break; + case DTV_BANDWIDTH_HZ: + fe->dtv_property_cache.bandwidth_hz = tvp->u.data; + break; + case DTV_INVERSION: + fe->dtv_property_cache.inversion = tvp->u.data; + break; + case DTV_SYMBOL_RATE: + fe->dtv_property_cache.symbol_rate = tvp->u.data; + break; + case DTV_INNER_FEC: + fe->dtv_property_cache.fec_inner = tvp->u.data; + break; + case DTV_PILOT: + fe->dtv_property_cache.pilot = tvp->u.data; + break; + case DTV_ROLLOFF: + fe->dtv_property_cache.rolloff = tvp->u.data; + break; + case DTV_DELIVERY_SYSTEM: + fe->dtv_property_cache.delivery_system = tvp->u.data; + break; + case DTV_VOLTAGE: + fe->dtv_property_cache.voltage = tvp->u.data; + r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_VOLTAGE, + (void *)fe->dtv_property_cache.voltage); + break; + case DTV_TONE: + fe->dtv_property_cache.sectone = tvp->u.data; + r = dvb_frontend_ioctl_legacy(inode, file, FE_SET_TONE, + (void *)fe->dtv_property_cache.sectone); + break; + case DTV_CODE_RATE_HP: + fe->dtv_property_cache.code_rate_HP = tvp->u.data; + break; + case DTV_CODE_RATE_LP: + fe->dtv_property_cache.code_rate_LP = tvp->u.data; + break; + case DTV_GUARD_INTERVAL: + fe->dtv_property_cache.guard_interval = tvp->u.data; + break; + case DTV_TRANSMISSION_MODE: + fe->dtv_property_cache.transmission_mode = tvp->u.data; + break; + case DTV_HIERARCHY: + fe->dtv_property_cache.hierarchy = tvp->u.data; + break; + default: + r = -1; + } + + return r; +} + +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", __func__); + + 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; + + if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY)) + err = dvb_frontend_ioctl_properties(inode, file, cmd, parg); + else { + fe->dtv_property_cache.state = DTV_UNDEFINED; + err = dvb_frontend_ioctl_legacy(inode, file, cmd, parg); + } + + up(&fepriv->sem); + return err; +} + +static int dvb_frontend_ioctl_properties(struct inode *inode, struct file *file, + unsigned int cmd, void *parg) +{ + struct dvb_device *dvbdev = file->private_data; + struct dvb_frontend *fe = dvbdev->priv; + int err = 0; + + struct dtv_properties *tvps = NULL; + struct dtv_property *tvp = NULL; + int i; + + dprintk("%s\n", __func__); + + if(cmd == FE_SET_PROPERTY) { + tvps = (struct dtv_properties __user *)parg; + + dprintk("%s() properties.num = %d\n", __func__, tvps->num); + dprintk("%s() properties.props = %p\n", __func__, tvps->props); + + /* Put an arbitrary limit on the number of messages that can + * be sent at once */ + if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) + return -EINVAL; + + tvp = (struct dtv_property *) kmalloc(tvps->num * + sizeof(struct dtv_property), GFP_KERNEL); + if (!tvp) { + err = -ENOMEM; + goto out; + } + + if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { + err = -EFAULT; + goto out; + } + + for (i = 0; i < tvps->num; i++) { + (tvp + i)->result = dtv_property_process_set(fe, tvp + i, inode, file); + err |= (tvp + i)->result; + } + + if(fe->dtv_property_cache.state == DTV_TUNE) + dprintk("%s() Property cache is full, tuning\n", __func__); + + } else + if(cmd == FE_GET_PROPERTY) { + + tvps = (struct dtv_properties __user *)parg; + + dprintk("%s() properties.num = %d\n", __func__, tvps->num); + dprintk("%s() properties.props = %p\n", __func__, tvps->props); + + /* Put an arbitrary limit on the number of messages that can + * be sent at once */ + if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) + return -EINVAL; + + tvp = (struct dtv_property *) kmalloc(tvps->num * + sizeof(struct dtv_property), GFP_KERNEL); + if (!tvp) { + err = -ENOMEM; + goto out; + } + + if (copy_from_user(tvp, tvps->props, tvps->num * sizeof(struct dtv_property))) { + err = -EFAULT; + goto out; + } + + for (i = 0; i < tvps->num; i++) { + (tvp + i)->result = dtv_property_process_get(fe, tvp + i, inode, file); + err |= (tvp + i)->result; + } + + if (copy_to_user(tvps->props, tvp, tvps->num * sizeof(struct dtv_property))) { + err = -EFAULT; + goto out; + } + + } else + err = -EOPNOTSUPP; + +out: + kfree(tvp); + return err; +} + +static int dvb_frontend_ioctl_legacy(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; + + 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 swcmd = ((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", __func__, swcmd); + 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 ((swcmd & 0x01) != last) { + /* set voltage to (last ? 13V : 18V) */ + fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); + last = (last) ? 0 : 1; + } + swcmd = swcmd >> 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", + __func__, 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(fe->dtv_property_cache.state == DTV_TUNE) { + if (dvb_frontend_check_parameters(fe, &fepriv->parameters) < 0) { + err = -EINVAL; + break; + } + } else { + if (dvb_frontend_check_parameters(fe, parg) < 0) { + err = -EINVAL; + break; + } + + memcpy (&fepriv->parameters, parg, + sizeof (struct dvb_frontend_parameters)); + dtv_property_cache_sync(fe, &fepriv->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; + }; + + 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", __func__); + + 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; + struct dvb_adapter *adapter = fe->dvb; + int ret; + + dprintk ("%s\n", __func__); + + if (adapter->mfe_shared) { + mutex_lock (&adapter->mfe_lock); + + if (adapter->mfe_dvbdev == NULL) + adapter->mfe_dvbdev = dvbdev; + + else if (adapter->mfe_dvbdev != dvbdev) { + struct dvb_device + *mfedev = adapter->mfe_dvbdev; + struct dvb_frontend + *mfe = mfedev->priv; + struct dvb_frontend_private + *mfepriv = mfe->frontend_priv; + int mferetry = (dvb_mfe_wait_time << 1); + + mutex_unlock (&adapter->mfe_lock); + while (mferetry-- && (mfedev->users != -1 || + mfepriv->thread != NULL)) { + if(msleep_interruptible(500)) { + if(signal_pending(current)) + return -EINTR; + } + } + + mutex_lock (&adapter->mfe_lock); + if(adapter->mfe_dvbdev != dvbdev) { + mfedev = adapter->mfe_dvbdev; + mfe = mfedev->priv; + mfepriv = mfe->frontend_priv; + if (mfedev->users != -1 || + mfepriv->thread != NULL) { + mutex_unlock (&adapter->mfe_lock); + return -EBUSY; + } + adapter->mfe_dvbdev = dvbdev; + } + } + } + + if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { + if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) + goto err0; + } + + 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; + } + + if (adapter->mfe_shared) + mutex_unlock (&adapter->mfe_lock); + 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); +err0: + if (adapter->mfe_shared) + mutex_unlock (&adapter->mfe_lock); + 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", __func__); + + 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", __func__); + + 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 adapter %i frontend %i (%s)...\n", + fe->dvb->num, + fe->id, + 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", __func__); + + 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_MEDIA_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); |
