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linux/drivers/media/dvb-core/dvb_frontend.c
Shuah Khan 87cd0fa811 [media] media: dvb-core add new flag exit flag value for resume 
Some fe drivers will have to do additional initialization
in their fe ops.init interfaces when called during resume.
Without the additional initialization, fe and tuner driver
resume fails. A new fe exit flag value DVB_FE_DEVICE_RESUME
is necessary to detect resume case. This patch adds a new
define and changes dvb_frontend_resume() to set it prior to
calling fe init and tuner init calls and resets it back to
DVB_FE_NO_EXIT once fe and tuner init is done.

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2014-07-26 11:20:10 -03:00

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/*
* 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.
*/
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 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 (fe->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;
fe->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())
fe->exit = DVB_FE_DEVICE_REMOVED;
else
fe->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__);
if (fe->exit != DVB_FE_DEVICE_REMOVED)
fe->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 (fe->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;
fe->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 (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
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 (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
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 (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
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 (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) {
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);
if (r < 0)
c->lna = LNA_AUTO;
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 (fe->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 (fe->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 (fe->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);
fe->exit = DVB_FE_DEVICE_RESUME;
if (fe->ops.init)
ret = fe->ops.init(fe);
if (fe->ops.tuner_ops.init)
ret = fe->ops.tuner_ops.init(fe);
fe->exit = DVB_FE_NO_EXIT;
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 CONFIG_MEDIA_ATTACH
void dvb_frontend_detach(struct dvb_frontend* fe)
{
void *ptr;
if (fe->ops.release_sec) {
fe->ops.release_sec(fe);
dvb_detach(fe->ops.release_sec);
}
if (fe->ops.tuner_ops.release) {
fe->ops.tuner_ops.release(fe);
dvb_detach(fe->ops.tuner_ops.release);
}
if (fe->ops.analog_ops.release) {
fe->ops.analog_ops.release(fe);
dvb_detach(fe->ops.analog_ops.release);
}
ptr = (void*)fe->ops.release;
if (ptr) {
fe->ops.release(fe);
dvb_detach(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);
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