diff options
Diffstat (limited to 'drivers/media/dvb/dvb-core/dvb_frontend.c')
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvb_frontend.c | 2553 |
1 files changed, 0 insertions, 2553 deletions
diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c deleted file mode 100644 index 12e5eb1fff76..000000000000 --- a/drivers/media/dvb/dvb-core/dvb_frontend.c +++ /dev/null @@ -1,2553 +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 - */ - -/* Enables DVBv3 compatibility bits at the headers */ -#define __DVB_CORE__ - -#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/semaphore.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_ERROR 256 -#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. - */ - -#define DVB_FE_NO_EXIT 0 -#define DVB_FE_NORMAL_EXIT 1 -#define DVB_FE_DEVICE_REMOVED 2 - -static DEFINE_MUTEX(frontend_mutex); - -struct dvb_frontend_private { - - /* thread/frontend values */ - struct dvb_device *dvbdev; - struct dvb_frontend_parameters parameters_out; - 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; - enum dvbfe_search algo_status; -}; - -static void dvb_frontend_wakeup(struct dvb_frontend *fe); -static int dtv_get_frontend(struct dvb_frontend *fe, - struct dvb_frontend_parameters *p_out); -static int dtv_property_legacy_params_sync(struct dvb_frontend *fe, - struct dvb_frontend_parameters *p); - -static bool has_get_frontend(struct dvb_frontend *fe) -{ - return fe->ops.get_frontend != NULL; -} - -/* - * Due to DVBv3 API calls, a delivery system should be mapped into one of - * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC), - * otherwise, a DVBv3 call will fail. - */ -enum dvbv3_emulation_type { - DVBV3_UNKNOWN, - DVBV3_QPSK, - DVBV3_QAM, - DVBV3_OFDM, - DVBV3_ATSC, -}; - -static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system) -{ - switch (delivery_system) { - case SYS_DVBC_ANNEX_A: - case SYS_DVBC_ANNEX_C: - return DVBV3_QAM; - case SYS_DVBS: - case SYS_DVBS2: - case SYS_TURBO: - case SYS_ISDBS: - case SYS_DSS: - return DVBV3_QPSK; - case SYS_DVBT: - case SYS_DVBT2: - case SYS_ISDBT: - case SYS_DTMB: - return DVBV3_OFDM; - case SYS_ATSC: - case SYS_ATSCMH: - case SYS_DVBC_ANNEX_B: - return DVBV3_ATSC; - case SYS_UNDEFINED: - case SYS_ISDBC: - case SYS_DVBH: - case SYS_DAB: - default: - /* - * Doesn't know how to emulate those types and/or - * there's no frontend driver from this type yet - * with some emulation code, so, we're not sure yet how - * to handle them, or they're not compatible with a DVBv3 call. - */ - return DVBV3_UNKNOWN; - } -} - -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 ((status & FE_HAS_LOCK) && has_get_frontend(fe)) - dtv_get_frontend(fe, &fepriv->parameters_out); - - mutex_lock(&events->mtx); - - 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]; - e->status = status; - e->parameters = fepriv->parameters_out; - - events->eventw = wp; - - mutex_unlock(&events->mtx); - - 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; - } - - mutex_lock(&events->mtx); - *event = events->events[events->eventr]; - events->eventr = (events->eventr + 1) % MAX_EVENT; - mutex_unlock(&events->mtx); - - return 0; -} - -static void dvb_frontend_clear_events(struct dvb_frontend *fe) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - struct dvb_fe_events *events = &fepriv->events; - - mutex_lock(&events->mtx); - events->eventr = events->eventw; - mutex_unlock(&events->mtx); -} - -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; - int fe_set_err = 0; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; - int original_inversion = c->inversion; - u32 original_frequency = c->frequency; - - /* are we using autoinversion? */ - autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && - (c->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 */ - c->frequency += fepriv->lnb_drift; - if (autoinversion) - c->inversion = fepriv->inversion; - tmp = *c; - if (fe->ops.set_frontend) - fe_set_err = fe->ops.set_frontend(fe); - *c = tmp; - if (fe_set_err < 0) { - fepriv->state = FESTATE_ERROR; - return fe_set_err; - } - - c->frequency = original_frequency; - c->inversion = original_inversion; - - fepriv->auto_sub_step++; - return 0; -} - -static void dvb_frontend_swzigzag(struct dvb_frontend *fe) -{ - fe_status_t s = 0; - int retval = 0; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; - - /* 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) { - tmp = *c; - if (fe->ops.set_frontend) - retval = fe->ops.set_frontend(fe); - *c = tmp; - if (retval < 0) - fepriv->state = FESTATE_ERROR; - else - 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)) && - (c->inversion == INVERSION_AUTO)) { - c->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; - - /* perform a tune */ - retval = dvb_frontend_swzigzag_autotune(fe, - fepriv->check_wrapped); - if (retval < 0) { - return; - } else if (retval) { - /* 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 != DVB_FE_NO_EXIT) - return 1; - - if (fepriv->dvbdev->writers == 1) - if (time_after_eq(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; - fe_status_t s; - enum dvbfe_algo algo; - - bool re_tune = false; - - 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: - 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 */ - fepriv->exit = DVB_FE_NORMAL_EXIT; - break; - } - - if (try_to_freeze()) - goto restart; - - if (down_interruptible(&fepriv->sem)) - break; - - if (fepriv->reinitialise) { - dvb_frontend_init(fe); - if (fe->ops.set_tone && fepriv->tone != -1) - fe->ops.set_tone(fe, fepriv->tone); - if (fe->ops.set_voltage && 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) { - algo = fe->ops.get_frontend_algo(fe); - switch (algo) { - case DVBFE_ALGO_HW: - dprintk("%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__); - - if (fepriv->state & FESTATE_RETUNE) { - dprintk("%s: Retune requested, FESTATE_RETUNE\n", __func__); - re_tune = true; - fepriv->state = FESTATE_TUNED; - } else { - re_tune = false; - } - - if (fe->ops.tune) - fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s); - - if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) { - dprintk("%s: state changed, adding current state\n", __func__); - dvb_frontend_add_event(fe, s); - fepriv->status = s; - } - break; - case DVBFE_ALGO_SW: - dprintk("%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__); - dvb_frontend_swzigzag(fe); - break; - case DVBFE_ALGO_CUSTOM: - dprintk("%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state); - if (fepriv->state & FESTATE_RETUNE) { - dprintk("%s: Retune requested, FESTAT_RETUNE\n", __func__); - fepriv->state = FESTATE_TUNED; - } - /* Case where we are going to search for a carrier - * User asked us to retune again for some reason, possibly - * requesting a search with a new set of parameters - */ - if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) { - if (fe->ops.search) { - fepriv->algo_status = fe->ops.search(fe); - /* We did do a search as was requested, the flags are - * now unset as well and has the flags wrt to search. - */ - } else { - fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN; - } - } - /* Track the carrier if the search was successful */ - if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) { - fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; - fepriv->delay = HZ / 2; - } - dtv_property_legacy_params_sync(fe, &fepriv->parameters_out); - fe->ops.read_status(fe, &s); - if (s != fepriv->status) { - dvb_frontend_add_event(fe, s); /* update event list */ - fepriv->status = s; - if (!(s & FE_HAS_LOCK)) { - fepriv->delay = HZ / 10; - fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; - } else { - fepriv->delay = 60 * HZ; - } - } - break; - default: - dprintk("%s: UNDEFINED ALGO !\n", __func__); - break; - } - } 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; - if (kthread_should_stop()) - fepriv->exit = DVB_FE_DEVICE_REMOVED; - else - fepriv->exit = DVB_FE_NO_EXIT; - 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 = DVB_FE_NORMAL_EXIT; - mb(); - - if (!fepriv->thread) - return; - - kthread_stop(fepriv->thread); - - sema_init(&fepriv->sem, 1); - 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 == DVB_FE_NO_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 = DVB_FE_NO_EXIT; - 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_frequency_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 dtv_frontend_properties *c = &fe->dtv_property_cache; - u32 freq_min; - u32 freq_max; - - /* range check: frequency */ - dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max); - if ((freq_min && c->frequency < freq_min) || - (freq_max && c->frequency > freq_max)) { - printk(KERN_WARNING "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n", - fe->dvb->num, fe->id, c->frequency, freq_min, freq_max); - return -EINVAL; - } - - /* range check: symbol rate */ - switch (c->delivery_system) { - case SYS_DVBS: - case SYS_DVBS2: - case SYS_TURBO: - case SYS_DVBC_ANNEX_A: - case SYS_DVBC_ANNEX_C: - if ((fe->ops.info.symbol_rate_min && - c->symbol_rate < fe->ops.info.symbol_rate_min) || - (fe->ops.info.symbol_rate_max && - c->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, c->symbol_rate, - fe->ops.info.symbol_rate_min, - fe->ops.info.symbol_rate_max); - return -EINVAL; - } - default: - break; - } - - return 0; -} - -static int dvb_frontend_clear_cache(struct dvb_frontend *fe) -{ - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int i; - u32 delsys; - - delsys = c->delivery_system; - memset(c, 0, sizeof(struct dtv_frontend_properties)); - c->delivery_system = delsys; - - c->state = DTV_CLEAR; - - dprintk("%s() Clearing cache for delivery system %d\n", __func__, - c->delivery_system); - - c->transmission_mode = TRANSMISSION_MODE_AUTO; - c->bandwidth_hz = 0; /* AUTO */ - c->guard_interval = GUARD_INTERVAL_AUTO; - c->hierarchy = HIERARCHY_AUTO; - c->symbol_rate = 0; - c->code_rate_HP = FEC_AUTO; - c->code_rate_LP = FEC_AUTO; - c->fec_inner = FEC_AUTO; - c->rolloff = ROLLOFF_AUTO; - c->voltage = SEC_VOLTAGE_OFF; - c->sectone = SEC_TONE_OFF; - c->pilot = PILOT_AUTO; - - c->isdbt_partial_reception = 0; - c->isdbt_sb_mode = 0; - c->isdbt_sb_subchannel = 0; - c->isdbt_sb_segment_idx = 0; - c->isdbt_sb_segment_count = 0; - c->isdbt_layer_enabled = 0; - for (i = 0; i < 3; i++) { - c->layer[i].fec = FEC_AUTO; - c->layer[i].modulation = QAM_AUTO; - c->layer[i].interleaving = 0; - c->layer[i].segment_count = 0; - } - - c->isdbs_ts_id = 0; - c->dvbt2_plp_id = 0; - - switch (c->delivery_system) { - case SYS_DVBS: - case SYS_DVBS2: - case SYS_TURBO: - c->modulation = QPSK; /* implied for DVB-S in legacy API */ - c->rolloff = ROLLOFF_35;/* implied for DVB-S */ - break; - case SYS_ATSC: - c->modulation = VSB_8; - break; - default: - c->modulation = QAM_AUTO; - break; - } - - return 0; -} - -#define _DTV_CMD(n, s, b) \ -[n] = { \ - .name = #n, \ - .cmd = n, \ - .set = s,\ - .buffer = b \ -} - -static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = { - _DTV_CMD(DTV_TUNE, 1, 0), - _DTV_CMD(DTV_CLEAR, 1, 0), - - /* Set */ - _DTV_CMD(DTV_FREQUENCY, 1, 0), - _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0), - _DTV_CMD(DTV_MODULATION, 1, 0), - _DTV_CMD(DTV_INVERSION, 1, 0), - _DTV_CMD(DTV_DISEQC_MASTER, 1, 1), - _DTV_CMD(DTV_SYMBOL_RATE, 1, 0), - _DTV_CMD(DTV_INNER_FEC, 1, 0), - _DTV_CMD(DTV_VOLTAGE, 1, 0), - _DTV_CMD(DTV_TONE, 1, 0), - _DTV_CMD(DTV_PILOT, 1, 0), - _DTV_CMD(DTV_ROLLOFF, 1, 0), - _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0), - _DTV_CMD(DTV_HIERARCHY, 1, 0), - _DTV_CMD(DTV_CODE_RATE_HP, 1, 0), - _DTV_CMD(DTV_CODE_RATE_LP, 1, 0), - _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0), - _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0), - _DTV_CMD(DTV_INTERLEAVING, 1, 0), - - _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0), - _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0), - _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0), - _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0), - _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0), - _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0), - - _DTV_CMD(DTV_ISDBS_TS_ID, 1, 0), - _DTV_CMD(DTV_DVBT2_PLP_ID, 1, 0), - - /* Get */ - _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1), - _DTV_CMD(DTV_API_VERSION, 0, 0), - _DTV_CMD(DTV_CODE_RATE_HP, 0, 0), - _DTV_CMD(DTV_CODE_RATE_LP, 0, 0), - _DTV_CMD(DTV_GUARD_INTERVAL, 0, 0), - _DTV_CMD(DTV_TRANSMISSION_MODE, 0, 0), - _DTV_CMD(DTV_HIERARCHY, 0, 0), - _DTV_CMD(DTV_INTERLEAVING, 0, 0), - - _DTV_CMD(DTV_ENUM_DELSYS, 0, 0), - - _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0), - _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0), - - _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0), - _DTV_CMD(DTV_ATSCMH_PARADE_ID, 0, 0), - _DTV_CMD(DTV_ATSCMH_NOG, 0, 0), - _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0), - _DTV_CMD(DTV_ATSCMH_SGN, 0, 0), - _DTV_CMD(DTV_ATSCMH_PRC, 0, 0), - _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0), - _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 0, 0), - _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0), - _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0), - _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0), - _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0), - _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0), - _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0), - _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0), -}; - -static 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); -} - -/* 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. - */ -static int dtv_property_cache_sync(struct dvb_frontend *fe, - struct dtv_frontend_properties *c, - const struct dvb_frontend_parameters *p) -{ - c->frequency = p->frequency; - c->inversion = p->inversion; - - switch (dvbv3_type(c->delivery_system)) { - case DVBV3_QPSK: - dprintk("%s() Preparing QPSK req\n", __func__); - c->symbol_rate = p->u.qpsk.symbol_rate; - c->fec_inner = p->u.qpsk.fec_inner; - break; - case DVBV3_QAM: - dprintk("%s() Preparing QAM req\n", __func__); - c->symbol_rate = p->u.qam.symbol_rate; - c->fec_inner = p->u.qam.fec_inner; - c->modulation = p->u.qam.modulation; - break; - case DVBV3_OFDM: - dprintk("%s() Preparing OFDM req\n", __func__); - switch (p->u.ofdm.bandwidth) { - case BANDWIDTH_10_MHZ: - c->bandwidth_hz = 10000000; - break; - case BANDWIDTH_8_MHZ: - c->bandwidth_hz = 8000000; - break; - case BANDWIDTH_7_MHZ: - c->bandwidth_hz = 7000000; - break; - case BANDWIDTH_6_MHZ: - c->bandwidth_hz = 6000000; - break; - case BANDWIDTH_5_MHZ: - c->bandwidth_hz = 5000000; - break; - case BANDWIDTH_1_712_MHZ: - c->bandwidth_hz = 1712000; - break; - case BANDWIDTH_AUTO:< |