diff options
Diffstat (limited to 'drivers/media/dvb-core/dvb_frontend.c')
| -rw-r--r-- | drivers/media/dvb-core/dvb_frontend.c | 2696 |
1 files changed, 2696 insertions, 0 deletions
diff --git a/drivers/media/dvb-core/dvb_frontend.c b/drivers/media/dvb-core/dvb_frontend.c new file mode 100644 index 0000000..b9bdad2 --- /dev/null +++ b/drivers/media/dvb-core/dvb_frontend.c @@ -0,0 +1,2696 @@ +/* + * 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 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; + + dev_dbg(fe->dvb->device, "%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; + + dev_dbg(fe->dvb->device, "%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) +{ + dev_dbg(fe->dvb->device, + "%s: initialising adapter %i frontend %i (%s)...\n", + __func__, 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; + struct dvb_frontend *fe = fepriv->dvbdev->priv; + + dev_dbg(fe->dvb->device, "%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; + } + + dev_dbg(fe->dvb->device, "%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; + bool semheld = false; + + dev_dbg(fe->dvb->device, "%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 */ + if (!down_interruptible(&fepriv->sem)) + semheld = true; + 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: + dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__); + + if (fepriv->state & FESTATE_RETUNE) { + dev_dbg(fe->dvb->device, "%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)) { + dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__); + dvb_frontend_add_event(fe, s); + fepriv->status = s; + } + break; + case DVBFE_ALGO_SW: + dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__); + dvb_frontend_swzigzag(fe); + break; + case DVBFE_ALGO_CUSTOM: + dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state); + if (fepriv->state & FESTATE_RETUNE) { + dev_dbg(fe->dvb->device, "%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: + dev_dbg(fe->dvb->device, "%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(); + + if (semheld) + up(&fepriv->sem); + dvb_frontend_wakeup(fe); + return 0; +} + +static void dvb_frontend_stop(struct dvb_frontend *fe) +{ + struct dvb_frontend_private *fepriv = fe->frontend_priv; + + dev_dbg(fe->dvb->device, "%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) + dev_warn(fe->dvb->device, + "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; + + dev_dbg(fe->dvb->device, "%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); + dev_warn(fe->dvb->device, + "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) + dev_warn(fe->dvb->device, "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)) { + dev_warn(fe->dvb->device, "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)) { + dev_warn(fe->dvb->device, "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, offsetof(struct dtv_frontend_properties, strength)); + c->delivery_system = delsys; + + c->state = DTV_CLEAR; + + dev_dbg(fe->dvb->device, "%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->stream_id = NO_STREAM_ID_FILTER; + + 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; + } + + c->lna = LNA_AUTO; + + 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_STREAM_ID, 1, 0), + _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0), + _DTV_CMD(DTV_LNA, 1, 0), + + /* Get */ + _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1), + _DTV_CMD(DTV_API_VERSION, 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_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_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), + + /* Statistics API */ + _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0), + _DTV_CMD(DTV_STAT_CNR, 0, 0), + _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0), + _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0), + _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0), + _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0), + _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0), + _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0), +}; + +static void dtv_property_dump(struct dvb_frontend *fe, struct dtv_property *tvp) +{ + int i; + + if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) { + dev_warn(fe->dvb->device, "%s: tvp.cmd = 0x%08x undefined\n", + __func__, tvp->cmd); + return; + } + + dev_dbg(fe->dvb->device, "%s: tvp.cmd = 0x%08x (%s)\n", __func__, + tvp->cmd, dtv_cmds[tvp->cmd].name); + + if (dtv_cmds[tvp->cmd].buffer) { + dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n", + __func__, tvp->u.buffer.len); + + for(i = 0; i < tvp->u.buffer.len; i++) + dev_dbg(fe->dvb->device, + "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n", + __func__, i, tvp->u.buffer.data[i]); + } else { + dev_dbg(fe->dvb->device, "%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: + dev_dbg(fe->dvb->device, "%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: + dev_dbg(fe->dvb->device, "%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: + dev_dbg(fe->dvb->device, "%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: + 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; + break; + case DVBV3_ATSC: + dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__); + c->modulation = p->u.vsb.modulation; + if (c->delivery_system == SYS_ATSCMH) + break; + if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) + c->delivery_system = SYS_ATSC; + else + c->delivery_system = SYS_DVBC_ANNEX_B; + break; + case DVBV3_UNKNOWN: + dev_err(fe->dvb->device, + "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", + __func__, c->delivery_system); + return -EINVAL; + } + + return 0; +} + +/* Ensure the cached values are set correctly in the frontend + * legacy tuning structures, for the advanced tuning API. + */ +static int dtv_property_legacy_params_sync(struct dvb_frontend *fe, + struct dvb_frontend_parameters *p) +{ + const struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + p->frequency = c->frequency; + p->inversion = c->inversion; + + switch (dvbv3_type(c->delivery_system)) { + case DVBV3_UNKNOWN: + dev_err(fe->dvb->device, + "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", + __func__, c->delivery_system); + return -EINVAL; + case DVBV3_QPSK: + dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); + p->u.qpsk.symbol_rate = c->symbol_rate; + p->u.qpsk.fec_inner = c->fec_inner; + break; + case DVBV3_QAM: + dev_dbg(fe->dvb->device, "%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; + break; + case DVBV3_OFDM: + dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); + switch (c->bandwidth_hz) { + case 10000000: + p->u.ofdm.bandwidth = BANDWIDTH_10_MHZ; + break; + case 8000000: + p->u.ofdm.bandwidth = BANDWIDTH_8_MHZ; + break; + case 7000000: + p->u.ofdm.bandwidth = BANDWIDTH_7_MHZ; + break; + case 6000000: + p->u.ofdm.bandwidth = BANDWIDTH_6_MHZ; + break; + case 5000000: + p->u.ofdm.bandwidth = BANDWIDTH_5_MHZ; + break; + case 1712000: + p->u.ofdm.bandwidth = BANDWIDTH_1_712_MHZ; + break; + case 0: + default: + 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; + break; + case DVBV3_ATSC: + dev_dbg(fe->dvb->device, "%s: Preparing VSB req\n", __func__); + p->u.vsb.modulation = c->modulation; + break; + } + return 0; +} + +/** + * dtv_get_frontend - calls a callback for retrieving DTV parameters + * @fe: struct dvb_frontend pointer + * @c: struct dtv_frontend_properties pointer (DVBv5 cache) + * @p_out struct dvb_frontend_parameters pointer (DVBv3 FE struct) + * + * This routine calls either the DVBv3 or DVBv5 get_frontend call. + * If c is not null, it will update the DVBv5 cache struct pointed by it. + * If p_out is not null, it will update the DVBv3 params pointed by it. + */ +static int dtv_get_frontend(struct dvb_frontend *fe, + struct dvb_frontend_parameters *p_out) +{ + int r; + + if (fe->ops.get_frontend) { + r = fe->ops.get_frontend(fe); + if (unlikely(r < 0)) + return r; + if (p_out) + dtv_property_legacy_params_sync(fe, p_out); + return 0; + } + + /* As everything is in cache, get_frontend fops are always supported */ + return 0; +} + +static int dvb_frontend_ioctl_legacy(struct file *file, + unsigned int cmd, void *parg); +static int dvb_frontend_ioctl_properties(struct file *file, + unsigned int cmd, void *parg); + +static int dtv_property_process_get(struct dvb_frontend *fe, + const struct dtv_frontend_properties *c, + struct dtv_property *tvp, + struct file *file) +{ + int r, ncaps; + + switch(tvp->cmd) { + case DTV_ENUM_DELSYS: + ncaps = 0; + while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { + tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps]; + ncaps++; + } + tvp->u.buffer.len = ncaps; + break; + case DTV_FREQUENCY: + tvp->u.data = c->frequency; + break; + case DTV_MODULATION: + tvp->u.data = c->modulation; + break; + case DTV_BANDWIDTH_HZ: + tvp->u.data = c->bandwidth_hz; + break; + case DTV_INVERSION: + tvp->u.data = c->inversion; + break; + case DTV_SYMBOL_RATE: + tvp->u.data = c->symbol_rate; + break; + case DTV_INNER_FEC: + tvp->u.data = c->fec_inner; + break; + case DTV_PILOT: + tvp->u.data = c->pilot; + break; + case DTV_ROLLOFF: + tvp->u.data = c->rolloff; + break; + case DTV_DELIVERY_SYSTEM: + tvp->u.data = c->delivery_system; + break; + case DTV_VOLTAGE: + tvp->u.data = c->voltage; + break; + case DTV_TONE: + tvp->u.data = c->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 = c->code_rate_HP; + break; + case DTV_CODE_RATE_LP: + tvp->u.data = c->code_rate_LP; + break; + case DTV_GUARD_INTERVAL: + tvp->u.data = c->guard_interval; + break; + case DTV_TRANSMISSION_MODE: + tvp->u.data = c->transmission_mode; + break; + case DTV_HIERARCHY: + tvp->u.data = c->hierarchy; + break; + case DTV_INTERLEAVING: + tvp->u.data = c->interleaving; + break; + + /* ISDB-T Support here */ + case DTV_ISDBT_PARTIAL_RECEPTION: + tvp->u.data = c->isdbt_partial_reception; + break; + case DTV_ISDBT_SOUND_BROADCASTING: + tvp->u.data = c->isdbt_sb_mode; + break; + case DTV_ISDBT_SB_SUBCHANNEL_ID: + tvp->u.data = c->isdbt_sb_subchannel; + break; + case DTV_ISDBT_SB_SEGMENT_IDX: + tvp->u.data = c->isdbt_sb_segment_idx; + break; + case DTV_ISDBT_SB_SEGMENT_COUNT: + tvp->u.data = c->isdbt_sb_segment_count; + break; + case DTV_ISDBT_LAYER_ENABLED: + tvp->u.data = c->isdbt_layer_enabled; + break; + case DTV_ISDBT_LAYERA_FEC: + tvp->u.data = c->layer[0].fec; + break; + case DTV_ISDBT_LAYERA_MODULATION: + tvp->u.data = c->layer[0].modulation; + break; + case DTV_ISDBT_LAYERA_SEGMENT_COUNT: + tvp->u.data = c->layer[0].segment_count; + break; + case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: + tvp->u.data = c->layer[0].interleaving; + break; + case DTV_ISDBT_LAYERB_FEC: + tvp->u.data = c->layer[1].fec; + break; + case DTV_ISDBT_LAYERB_MODULATION: + tvp->u.data = c->layer[1].modulation; + break; + case DTV_ISDBT_LAYERB_SEGMENT_COUNT: + tvp->u.data = c->layer[1].segment_count; + break; + case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: + tvp->u.data = c->layer[1].interleaving; + break; + case DTV_ISDBT_LAYERC_FEC: + tvp->u.data = c->layer[2].fec; + break; + case DTV_ISDBT_LAYERC_MODULATION: + tvp->u.data = c->layer[2].modulation; + break; + case DTV_ISDBT_LAYERC_SEGMENT_COUNT: + tvp->u.data = c->layer[2].segment_count; + break; + case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: + tvp->u.data = c->layer[2].interleaving; + break; + + /* Multistream support */ + case DTV_STREAM_ID: + case DTV_DVBT2_PLP_ID_LEGACY: + tvp->u.data = c->stream_id; + break; + + /* ATSC-MH */ + case DTV_ATSCMH_FIC_VER: + tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver; + break; + case DTV_ATSCMH_PARADE_ID: + tvp->u.data = fe->dtv_property_cache.atscmh_parade_id; + break; + case DTV_ATSCMH_NOG: + tvp->u.data = fe->dtv_property_cache.atscmh_nog; + break; + case DTV_ATSCMH_TNOG: + tvp->u.data = fe->dtv_property_cache.atscmh_tnog; + break; + case DTV_ATSCMH_SGN: + tvp->u.data = fe->dtv_property_cache.atscmh_sgn; + break; + case DTV_ATSCMH_PRC: + tvp->u.data = fe->dtv_property_cache.atscmh_prc; + break; + case DTV_ATSCMH_RS_FRAME_MODE: + tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode; + break; + case DTV_ATSCMH_RS_FRAME_ENSEMBLE: + tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble; + break; + case DTV_ATSCMH_RS_CODE_MODE_PRI: + tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri; + break; + case DTV_ATSCMH_RS_CODE_MODE_SEC: + tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec; + break; + case DTV_ATSCMH_SCCC_BLOCK_MODE: + tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode; + break; + case DTV_ATSCMH_SCCC_CODE_MODE_A: + tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a; + break; + case DTV_ATSCMH_SCCC_CODE_MODE_B: + tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b; + break; + case DTV_ATSCMH_SCCC_CODE_MODE_C: + tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c; + break; + case DTV_ATSCMH_SCCC_CODE_MODE_D: + tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d; + break; + + case DTV_LNA: + tvp->u.data = c->lna; + break; + + /* Fill quality measures */ + case DTV_STAT_SIGNAL_STRENGTH: + tvp->u.st = c->strength; + break; + case DTV_STAT_CNR: + tvp->u.st = c->cnr; + break; + case DTV_STAT_PRE_ERROR_BIT_COUNT: + tvp->u.st = c->pre_bit_error; + break; + case DTV_STAT_PRE_TOTAL_BIT_COUNT: + tvp->u.st = c->pre_bit_count; + break; + case DTV_STAT_POST_ERROR_BIT_COUNT: + tvp->u.st = c->post_bit_error; + break; + case DTV_STAT_POST_TOTAL_BIT_COUNT: + tvp->u.st = c->post_bit_count; + break; + case DTV_STAT_ERROR_BLOCK_COUNT: + tvp->u.st = c->block_error; + break; + case DTV_STAT_TOTAL_BLOCK_COUNT: + tvp->u.st = c->block_count; + break; + default: + dev_dbg(fe->dvb->device, + "%s: FE property %d doesn't exist\n", + __func__, tvp->cmd); + return -EINVAL; + } + + /* Allow the frontend to override outgoing properties */ + if (fe->ops.get_property) { + r = fe->ops.get_property(fe, tvp); + if (r < 0) + return r; + } + + dtv_property_dump(fe, tvp); + + return 0; +} + +static int dtv_set_frontend(struct dvb_frontend *fe); + +static bool is_dvbv3_delsys(u32 delsys) +{ + bool status; + + status = (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) || + (delsys == SYS_DVBS) || (delsys == SYS_ATSC); + + return status; +} + +/** + * emulate_delivery_system - emulate a DVBv5 delivery system with a DVBv3 type + * @fe: struct frontend; + * @delsys: DVBv5 type that will be used for emulation + * + * Provides emulation for delivery systems that are compatible with the old + * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows + * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent + * parameters are compatible with DVB-S spec. + */ +static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys) +{ + int i; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + c->delivery_system = delsys; + + /* + * If the call is for ISDB-T, put it into full-seg, auto mode, TV + */ + if (c->delivery_system == SYS_ISDBT) { + dev_dbg(fe->dvb->device, + "%s: Using defaults for SYS_ISDBT\n", + __func__); + + if (!c->bandwidth_hz) + c->bandwidth_hz = 6000000; + + 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 = 7; + 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; + } + } + dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n", + __func__, c->delivery_system); + + return 0; +} + +/** + * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call + * @fe: frontend struct + * @desired_system: delivery system requested by the user + * + * A DVBv5 call know what's the desired system it wants. So, set it. + * + * There are, however, a few known issues with early DVBv5 applications that + * are also handled by this logic: + * + * 1) Some early apps use SYS_UNDEFINED as the desired delivery system. + * This is an API violation, but, as we don't want to break userspace, + * convert it to the first supported delivery system. + * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for + * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of + * ISDB-T provided backward compat with DVB-T. + */ +static int dvbv5_set_delivery_system(struct dvb_frontend *fe, + u32 desired_system) +{ + int ncaps; + u32 delsys = SYS_UNDEFINED; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + enum dvbv3_emulation_type type; + + /* + * It was reported that some old DVBv5 applications were + * filling delivery_system with SYS_UNDEFINED. If this happens, + * assume that the application wants to use the first supported + * delivery system. + */ + if (desired_system == SYS_UNDEFINED) + desired_system = fe->ops.delsys[0]; + + /* + * This is a DVBv5 call. So, it likely knows the supported + * delivery systems. So, check if the desired delivery system is + * supported + */ + ncaps = 0; + while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { + if (fe->ops.delsys[ncaps] == desired_system) { + c->delivery_system = desired_system; + dev_dbg(fe->dvb->device, + "%s: Changing delivery system to %d\n", + __func__, desired_system); + return 0; + } + ncaps++; + } + + /* + * The requested delivery system isn't supported. Maybe userspace + * is requesting a DVBv3 compatible delivery system. + * + * The emulation only works if the desired system is one of the + * delivery systems supported by DVBv3 API + */ + if (!is_dvbv3_delsys(desired_system)) { + dev_dbg(fe->dvb->device, + "%s: Delivery system %d not supported.\n", + __func__, desired_system); + return -EINVAL; + } + + type = dvbv3_type(desired_system); + + /* + * Get the last non-DVBv3 delivery system that has the same type + * of the desired system + */ + ncaps = 0; + while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { + if (dvbv3_type(fe->ops.delsys[ncaps]) == type) + delsys = fe->ops.delsys[ncaps]; + ncaps++; + } + + /* There's nothing compatible with the desired delivery system */ + if (delsys == SYS_UNDEFINED) { + dev_dbg(fe->dvb->device, + "%s: Delivery system %d not supported on emulation mode.\n", + __func__, desired_system); + return -EINVAL; + } + + dev_dbg(fe->dvb->device, + "%s: Using delivery system %d emulated as if it were %d\n", + __func__, delsys, desired_system); + + return emulate_delivery_system(fe, desired_system); +} + +/** + * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call + * @fe: frontend struct + * + * A DVBv3 call doesn't know what's the desired system it wants. It also + * doesn't allow to switch between different types. Due to that, userspace + * should use DVBv5 instead. + * However, in order to avoid breaking userspace API, limited backward + * compatibility support is provided. + * + * There are some delivery systems that are incompatible with DVBv3 calls. + * + * This routine should work fine for frontends that support just one delivery + * system. + * + * For frontends that support multiple frontends: + * 1) It defaults to use the first supported delivery system. There's an + * userspace application that allows changing it at runtime; + * + * 2) If the current delivery system is not compatible with DVBv3, it gets + * the first one that it is compatible. + * + * NOTE: in order for this to work with applications like Kaffeine that + * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to + * DVB-S, drivers that support both DVB-S and DVB-S2 should have the + * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back + * to DVB-S. + */ +static int dvbv3_set_delivery_system(struct dvb_frontend *fe) +{ + int ncaps; + u32 delsys = SYS_UNDEFINED; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + /* If not set yet, defaults to the first supported delivery system */ + if (c->delivery_system == SYS_UNDEFINED) + c->delivery_system = fe->ops.delsys[0]; + + /* + * Trivial case: just use the current one, if it already a DVBv3 + * delivery system + */ + if (is_dvbv3_delsys(c->delivery_system)) { + dev_dbg(fe->dvb->device, + "%s: Using delivery system to %d\n", + __func__, c->delivery_system); + return 0; + } + + /* + * Seek for the first delivery system that it is compatible with a + * DVBv3 standard + */ + ncaps = 0; + while (fe->ops.delsys[ncaps] && ncaps < MAX_DELSYS) { + if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) { + delsys = fe->ops.delsys[ncaps]; + break; + } + ncaps++; + } + if (delsys == SYS_UNDEFINED) { + dev_dbg(fe->dvb->device, + "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n", + __func__); + return -EINVAL; + } + return emulate_delivery_system(fe, delsys); +} + +static int dtv_property_process_set(struct dvb_frontend *fe, + struct dtv_property *tvp, + struct file *file) +{ + int r = 0; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + + /* 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. + */ + dvb_frontend_clear_cache(fe); + 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. + */ + c->state = tvp->cmd; + dev_dbg(fe->dvb->device, "%s: Finalised property cache\n", + __func__); + + r = dtv_set_frontend(fe); + break; + case DTV_FREQUENCY: + c->frequency = tvp->u.data; + break; + case DTV_MODULATION: + c->modulation = tvp->u.data; + break; + case DTV_BANDWIDTH_HZ: + c->bandwidth_hz = tvp->u.data; + break; + case DTV_INVERSION: + c->inversion = tvp->u.data; + break; + case DTV_SYMBOL_RATE: + c->symbol_rate = tvp->u.data; + break; + case DTV_INNER_FEC: + c->fec_inner = tvp->u.data; + break; + case DTV_PILOT: + c->pilot = tvp->u.data; + break; + case DTV_ROLLOFF: + c->rolloff = tvp->u.data; + break; + case DTV_DELIVERY_SYSTEM: + r = dvbv5_set_delivery_system(fe, tvp->u.data); + break; + case DTV_VOLTAGE: + c->voltage = tvp->u.data; + r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE, + (void *)c->voltage); + break; + case DTV_TONE: + c->sectone = tvp->u.data; + r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE, + (void *)c->sectone); + break; + case DTV_CODE_RATE_HP: + c->code_rate_HP = tvp->u.data; + break; + case DTV_CODE_RATE_LP: + c->code_rate_LP = tvp->u.data; + break; + case DTV_GUARD_INTERVAL: + c->guard_interval = tvp->u.data; + break; + case DTV_TRANSMISSION_MODE: + c->transmission_mode = tvp->u.data; + break; + case DTV_HIERARCHY: + c->hierarchy = tvp->u.data; + break; + case DTV_INTERLEAVING: + c->interleaving = tvp->u.data; + break; + + /* ISDB-T Support here */ + case DTV_ISDBT_PARTIAL_RECEPTION: + c->isdbt_partial_reception = tvp->u.data; + break; + case DTV_ISDBT_SOUND_BROADCASTING: + c->isdbt_sb_mode = tvp->u.data; + break; + case DTV_ISDBT_SB_SUBCHANNEL_ID: + c->isdbt_sb_subchannel = tvp->u.data; + break; + case DTV_ISDBT_SB_SEGMENT_IDX: + c->isdbt_sb_segment_idx = tvp->u.data; + break; + case DTV_ISDBT_SB_SEGMENT_COUNT: + c->isdbt_sb_segment_count = tvp->u.data; + break; + case DTV_ISDBT_LAYER_ENABLED: + c->isdbt_layer_enabled = tvp->u.data; + break; + case DTV_ISDBT_LAYERA_FEC: + c->layer[0].fec = tvp->u.data; + break; + case DTV_ISDBT_LAYERA_MODULATION: + c->layer[0].modulation = tvp->u.data; + break; + case DTV_ISDBT_LAYERA_SEGMENT_COUNT: + c->layer[0].segment_count = tvp->u.data; + break; + case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: + c->layer[0].interleaving = tvp->u.data; + break; + case DTV_ISDBT_LAYERB_FEC: + c->layer[1].fec = tvp->u.data; + break; + case DTV_ISDBT_LAYERB_MODULATION: + c->layer[1].modulation = tvp->u.data; + break; + case DTV_ISDBT_LAYERB_SEGMENT_COUNT: + c->layer[1].segment_count = tvp->u.data; + break; + case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: + c->layer[1].interleaving = tvp->u.data; + break; + case DTV_ISDBT_LAYERC_FEC: + c->layer[2].fec = tvp->u.data; + break; + case DTV_ISDBT_LAYERC_MODULATION: + c->layer[2].modulation = tvp->u.data; + break; + case DTV_ISDBT_LAYERC_SEGMENT_COUNT: + c->layer[2].segment_count = tvp->u.data; + break; + case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: + c->layer[2].interleaving = tvp->u.data; + break; + + /* Multistream support */ + case DTV_STREAM_ID: + case DTV_DVBT2_PLP_ID_LEGACY: + c->stream_id = tvp->u.data; + break; + + /* ATSC-MH */ + case DTV_ATSCMH_PARADE_ID: + fe->dtv_property_cache.atscmh_parade_id = tvp->u.data; + break; + case DTV_ATSCMH_RS_FRAME_ENSEMBLE: + fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data; + break; + + case DTV_LNA: + c->lna = tvp->u.data; + if (fe->ops.set_lna) + r = fe->ops.set_lna(fe); + break; + + default: + return -EINVAL; + } + + return r; +} + +static int dvb_frontend_ioctl(struct file *file, + unsigned int cmd, void *parg) +{ + struct dvb_device *dvbdev = file->private_data; + struct dvb_frontend *fe = dvbdev->priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct dvb_frontend_private *fepriv = fe->frontend_priv; + int err = -EOPNOTSUPP; + + dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd)); + if (down_interruptible(&fepriv->sem)) + return -ERESTARTSYS; + + if (fepriv->exit != DVB_FE_NO_EXIT) { + up(&fepriv->sem); + 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)) { + up(&fepriv->sem); + return -EPERM; + } + + if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY)) + err = dvb_frontend_ioctl_properties(file, cmd, parg); + else { + c->state = DTV_UNDEFINED; + err = dvb_frontend_ioctl_legacy(file, cmd, parg); + } + + up(&fepriv->sem); + return err; +} + +static int dvb_frontend_ioctl_properties(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; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int err = 0; + + struct dtv_properties *tvps = NULL; + struct dtv_property *tvp = NULL; + int i; + + dev_dbg(fe->dvb->device, "%s:\n", __func__); + + if(cmd == FE_SET_PROPERTY) { + tvps = (struct dtv_properties __user *)parg; + + dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num); + dev_dbg(fe->dvb->device, "%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 = 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++) { + err = dtv_property_process_set(fe, tvp + i, file); + if (err < 0) + goto out; + (tvp + i)->result = err; + } + + if (c->state == DTV_TUNE) + dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__); + + } else + if(cmd == FE_GET_PROPERTY) { + tvps = (struct dtv_properties __user *)parg; + + dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num); + dev_dbg(fe->dvb->device, "%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 = 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; + } + + /* + * Fills the cache out struct with the cache contents, plus + * the data retrieved from get_frontend, if the frontend + * is not idle. Otherwise, returns the cached content + */ + if (fepriv->state != FESTATE_IDLE) { + err = dtv_get_frontend(fe, NULL); + if (err < 0) + goto out; + } + for (i = 0; i < tvps->num; i++) { + err = dtv_property_process_get(fe, c, tvp + i, file); + if (err < 0) + goto out; + (tvp + i)->result = err; + } + + 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 dtv_set_frontend(struct dvb_frontend *fe) +{ + struct dvb_frontend_private *fepriv = fe->frontend_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct dvb_frontend_tune_settings fetunesettings; + u32 rolloff = 0; + + if (dvb_frontend_check_parameters(fe) < 0) + return -EINVAL; + + /* + * Initialize output parameters to match the values given by + * the user. FE_SET_FRONTEND triggers an initial frontend event + * with status = 0, which copies output parameters to userspace. + */ + dtv_property_legacy_params_sync(fe, &fepriv->parameters_out); + + /* + * Be sure that the bandwidth will be filled for all + * non-satellite systems, as tuners need to know what + * low pass/Nyquist half filter should be applied, in + * order to avoid inter-channel noise. + * + * ISDB-T and DVB-T/T2 already sets bandwidth. + * ATSC and DVB-C don't set, so, the core should fill it. + * + * On DVB-C Annex A and C, the bandwidth is a function of + * the roll-off and symbol rate. Annex B defines different + * roll-off factors depending on the modulation. Fortunately, + * Annex B is only used with 6MHz, so there's no need to + * calculate it. + * + * While not officially supported, a side effect of handling it at + * the cache level is that a program could retrieve the bandwidth + * via DTV_BANDWIDTH_HZ, which may be useful for test programs. + */ + switch (c->delivery_system) { + case SYS_ATSC: + case SYS_DVBC_ANNEX_B: + c->bandwidth_hz = 6000000; + break; + case SYS_DVBC_ANNEX_A: + rolloff = 115; + break; + case SYS_DVBC_ANNEX_C: + rolloff = 113; + break; + default: + break; + } + if (rolloff) + c->bandwidth_hz = (c->symbol_rate * rolloff) / 100; + + /* force auto frequency inversion if requested */ + if (dvb_force_auto_inversion) + c->inversion = INVERSION_AUTO; + + /* + * without hierarchical coding code_rate_LP is irrelevant, + * so we tolerate the otherwise invalid FEC_NONE setting + */ + if (c->hierarchy == HIERARCHY_NONE && c->code_rate_LP == FEC_NONE) + c->code_rate_LP = FEC_AUTO; + + /* get frontend-specific tuning settings */ + memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_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 (c->delivery_system) { + case SYS_DVBS: + case SYS_DVBS2: + case SYS_ISDBS: + case SYS_TURBO: + case SYS_DVBC_ANNEX_A: + case SYS_DVBC_ANNEX_C: + fepriv->min_delay = HZ / 20; + fepriv->step_size = c->symbol_rate / 16000; + fepriv->max_drift = c->symbol_rate / 2000; + break; + case SYS_DVBT: + case SYS_DVBT2: + case SYS_ISDBT: + case SYS_DTMB: + 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; + default: + /* + * FIXME: This sounds wrong! if freqency_stepsize is + * defined by the frontend, why not use it??? + */ + fepriv->min_delay = HZ / 20; + fepriv->step_size = 0; /* no zigzag */ + fepriv->max_drift = 0; + break; + } + } + if (dvb_override_tune_delay > 0) + fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; + + fepriv->state = FESTATE_RETUNE; + + /* Request the search algorithm to search */ + fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; + + dvb_frontend_clear_events(fe); + dvb_frontend_add_event(fe, 0); + dvb_frontend_wakeup(fe); + fepriv->status = 0; + + return 0; +} + + +static int dvb_frontend_ioctl_legacy(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; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + 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_frequency_limits(fe, &info->frequency_min, &info->frequency_max); + + /* + * Associate the 4 delivery systems supported by DVBv3 + * API with their DVBv5 counterpart. For the other standards, + * use the closest type, assuming that it would hopefully + * work with a DVBv3 application. + * It should be noticed that, on multi-frontend devices with + * different types (terrestrial and cable, for example), + * a pure DVBv3 application won't be able to use all delivery + * systems. Yet, changing the DVBv5 cache to the other delivery + * system should be enough for making it work. + */ + switch (dvbv3_type(c->delivery_system)) { + case DVBV3_QPSK: + info->type = FE_QPSK; + break; + case DVBV3_ATSC: + info->type = FE_ATSC; + break; + case DVBV3_QAM: + info->type = FE_QAM; + break; + case DVBV3_OFDM: + info->type = FE_OFDM; + break; + default: + dev_err(fe->dvb->device, + "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", + __func__, c->delivery_system); + fe->ops.info.type = FE_OFDM; + } + dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n", + __func__, c->delivery_system, fe->ops.info.type); + + /* 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 occurred yet, prevent + * that user get signal state from previous tuning */ + if (fepriv->state == FESTATE_RETUNE || + fepriv->state == FESTATE_ERROR) { + 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) { + if (fepriv->thread) + err = fe->ops.read_ber(fe, (__u32 *) parg); + else + err = -EAGAIN; + } + break; + + case FE_READ_SIGNAL_STRENGTH: + if (fe->ops.read_signal_strength) { + if (fepriv->thread) + err = fe->ops.read_signal_strength(fe, (__u16 *) parg); + else + err = -EAGAIN; + } + break; + + case FE_READ_SNR: + if (fe->ops.read_snr) { + if (fepriv->thread) + err = fe->ops.read_snr(fe, (__u16 *) parg); + else + err = -EAGAIN; + } + break; + + case FE_READ_UNCORRECTED_BLOCKS: + if (fe->ops.read_ucblocks) { + if (fepriv->thread) + err = fe->ops.read_ucblocks(fe, (__u32 *) parg); + else + err = -EAGAIN; + } + 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 should 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 dependent + * 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) + tv[0] = nexttime; + /* 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: + err = dvbv3_set_delivery_system(fe); + if (err) + break; + + err = dtv_property_cache_sync(fe, c, parg); + if (err) + break; + err = dtv_set_frontend(fe); + break; + case FE_GET_EVENT: + err = dvb_frontend_get_event (fe, parg, file->f_flags); + break; + + case FE_GET_FRONTEND: + err = dtv_get_frontend(fe, 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; + + dev_dbg_ratelimited(fe->dvb->device, "%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; + + dev_dbg(fe->dvb->device, "%s:\n", __func__); + if (fepriv->exit == DVB_FE_DEVICE_REMOVED) + return -ENODEV; + + 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 we took control of the bus, we need to force + reinitialization. This is because many ts_bus_ctrl() + functions strobe the RESET pin on the demod, and if the + frontend thread already exists then the dvb_init() routine + won't get called (which is what usually does initial + register configuration). */ + fepriv->reinitialise = 1; + } + + 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; + + dev_dbg(fe->dvb->device, "%s:\n", __func__); + + if ((file->f_flags & O_ACCMODE) != O_RDONLY) { + fepriv->release_jiffies = jiffies; + mb(); + } + + ret = dvb_generic_release (inode, file); + + if (dvbdev->users == -1) { + wake_up(&fepriv->wait_queue); + if (fepriv->exit != DVB_FE_NO_EXIT) + wake_up(&dvbdev->wait_queue); + if (fe->ops.ts_bus_ctrl) + fe->ops.ts_bus_ctrl(fe, 0); + } + + return ret; +} + +static const struct file_operations dvb_frontend_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = dvb_generic_ioctl, + .poll = dvb_frontend_poll, + .open = dvb_frontend_open, + .release = dvb_frontend_release, + .llseek = noop_llseek, +}; + +int dvb_frontend_suspend(struct dvb_frontend *fe) +{ + int ret = 0; + + dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, + fe->id); + + if (fe->ops.tuner_ops.sleep) + ret = fe->ops.tuner_ops.sleep(fe); + + if (fe->ops.sleep) + ret = fe->ops.sleep(fe); + + return ret; +} +EXPORT_SYMBOL(dvb_frontend_suspend); + +int dvb_frontend_resume(struct dvb_frontend *fe) +{ + struct dvb_frontend_private *fepriv = fe->frontend_priv; + int ret = 0; + + dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, + fe->id); + + if (fe->ops.init) + ret = fe->ops.init(fe); + + if (fe->ops.tuner_ops.init) + ret = fe->ops.tuner_ops.init(fe); + + fepriv->state = FESTATE_RETUNE; + dvb_frontend_wakeup(fe); + + return ret; +} +EXPORT_SYMBOL(dvb_frontend_resume); + +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 + }; + + dev_dbg(dvb->device, "%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; + + sema_init(&fepriv->sem, 1); + 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; + + dev_info(fe->dvb->device, + "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); + + /* + * Initialize the cache to the proper values according with the + * first supported delivery system (ops->delsys[0]) + */ + + fe->dtv_property_cache.delivery_system = fe->ops.delsys[0]; + dvb_frontend_clear_cache(fe); + + 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; + dev_dbg(fe->dvb->device, "%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 CPTCFG_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); |