7408187d22
Conversions from kmalloc+memset to k(z|c)alloc. Signed-off-by: Panagiotis Issaris <takis@issaris.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
1071 lines
29 KiB
C
1071 lines
29 KiB
C
/*
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* dvb_frontend.c: DVB frontend tuning interface/thread
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*
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*
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* Copyright (C) 1999-2001 Ralph Metzler
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* Marcus Metzler
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* Holger Waechtler
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* for convergence integrated media GmbH
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*
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* Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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* Or, point your browser to http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/slab.h>
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#include <linux/poll.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/list.h>
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#include <linux/suspend.h>
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#include <linux/jiffies.h>
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#include <asm/processor.h>
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#include <asm/semaphore.h>
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#include "dvb_frontend.h"
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#include "dvbdev.h"
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static int dvb_frontend_debug;
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static int dvb_shutdown_timeout = 5;
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static int dvb_force_auto_inversion;
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static int dvb_override_tune_delay;
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static int dvb_powerdown_on_sleep = 1;
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module_param_named(frontend_debug, dvb_frontend_debug, int, 0644);
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MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off).");
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module_param(dvb_shutdown_timeout, int, 0444);
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MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware");
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module_param(dvb_force_auto_inversion, int, 0444);
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MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always");
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module_param(dvb_override_tune_delay, int, 0444);
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MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt");
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module_param(dvb_powerdown_on_sleep, int, 0444);
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MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB volatage off on sleep (default)");
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#define dprintk if (dvb_frontend_debug) printk
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#define FESTATE_IDLE 1
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#define FESTATE_RETUNE 2
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#define FESTATE_TUNING_FAST 4
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#define FESTATE_TUNING_SLOW 8
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#define FESTATE_TUNED 16
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#define FESTATE_ZIGZAG_FAST 32
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#define FESTATE_ZIGZAG_SLOW 64
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#define FESTATE_DISEQC 128
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#define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC)
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#define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST)
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#define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW)
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#define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW)
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/*
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* FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling.
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* FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune.
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* FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress.
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* FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower.
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* FESTATE_TUNED. The frontend has successfully locked on.
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* FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it.
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* FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower.
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* FESTATE_DISEQC. A DISEQC command has just been issued.
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* FESTATE_WAITFORLOCK. When we're waiting for a lock.
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* FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan.
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* FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan.
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* FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again.
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*/
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static DECLARE_MUTEX(frontend_mutex);
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struct dvb_frontend_private {
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/* thread/frontend values */
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struct dvb_device *dvbdev;
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struct dvb_frontend_parameters parameters;
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struct dvb_fe_events events;
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struct semaphore sem;
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struct list_head list_head;
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wait_queue_head_t wait_queue;
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pid_t thread_pid;
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unsigned long release_jiffies;
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unsigned int exit;
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unsigned int wakeup;
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fe_status_t status;
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unsigned long tune_mode_flags;
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unsigned int delay;
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/* swzigzag values */
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unsigned int state;
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unsigned int bending;
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int lnb_drift;
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unsigned int inversion;
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unsigned int auto_step;
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unsigned int auto_sub_step;
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unsigned int started_auto_step;
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unsigned int min_delay;
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unsigned int max_drift;
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unsigned int step_size;
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int quality;
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unsigned int check_wrapped;
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};
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static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
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{
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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struct dvb_fe_events *events = &fepriv->events;
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struct dvb_frontend_event *e;
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int wp;
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dprintk ("%s\n", __FUNCTION__);
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if (down_interruptible (&events->sem))
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return;
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wp = (events->eventw + 1) % MAX_EVENT;
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if (wp == events->eventr) {
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events->overflow = 1;
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events->eventr = (events->eventr + 1) % MAX_EVENT;
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}
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e = &events->events[events->eventw];
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memcpy (&e->parameters, &fepriv->parameters,
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sizeof (struct dvb_frontend_parameters));
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if (status & FE_HAS_LOCK)
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if (fe->ops->get_frontend)
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fe->ops->get_frontend(fe, &e->parameters);
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events->eventw = wp;
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up (&events->sem);
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e->status = status;
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wake_up_interruptible (&events->wait_queue);
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}
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static int dvb_frontend_get_event(struct dvb_frontend *fe,
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struct dvb_frontend_event *event, int flags)
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{
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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struct dvb_fe_events *events = &fepriv->events;
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dprintk ("%s\n", __FUNCTION__);
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if (events->overflow) {
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events->overflow = 0;
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return -EOVERFLOW;
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}
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if (events->eventw == events->eventr) {
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int ret;
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if (flags & O_NONBLOCK)
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return -EWOULDBLOCK;
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up(&fepriv->sem);
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ret = wait_event_interruptible (events->wait_queue,
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events->eventw != events->eventr);
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if (down_interruptible (&fepriv->sem))
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return -ERESTARTSYS;
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if (ret < 0)
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return ret;
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}
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if (down_interruptible (&events->sem))
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return -ERESTARTSYS;
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memcpy (event, &events->events[events->eventr],
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sizeof(struct dvb_frontend_event));
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events->eventr = (events->eventr + 1) % MAX_EVENT;
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up (&events->sem);
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return 0;
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}
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static void dvb_frontend_init(struct dvb_frontend *fe)
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{
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dprintk ("DVB: initialising frontend %i (%s)...\n",
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fe->dvb->num,
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fe->ops->info.name);
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if (fe->ops->init)
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fe->ops->init(fe);
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}
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static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked)
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{
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int q2;
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dprintk ("%s\n", __FUNCTION__);
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if (locked)
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(fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256;
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else
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(fepriv->quality) = (fepriv->quality * 220 + 0) / 256;
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q2 = fepriv->quality - 128;
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q2 *= q2;
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fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128);
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}
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/**
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* Performs automatic twiddling of frontend parameters.
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*
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* @param fe The frontend concerned.
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* @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT
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* @returns Number of complete iterations that have been performed.
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*/
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static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped)
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{
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int autoinversion;
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int ready = 0;
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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int original_inversion = fepriv->parameters.inversion;
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u32 original_frequency = fepriv->parameters.frequency;
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/* are we using autoinversion? */
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autoinversion = ((!(fe->ops->info.caps & FE_CAN_INVERSION_AUTO)) &&
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(fepriv->parameters.inversion == INVERSION_AUTO));
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/* setup parameters correctly */
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while(!ready) {
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/* calculate the lnb_drift */
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fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size;
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/* wrap the auto_step if we've exceeded the maximum drift */
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if (fepriv->lnb_drift > fepriv->max_drift) {
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fepriv->auto_step = 0;
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fepriv->auto_sub_step = 0;
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fepriv->lnb_drift = 0;
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}
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/* perform inversion and +/- zigzag */
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switch(fepriv->auto_sub_step) {
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case 0:
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/* try with the current inversion and current drift setting */
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ready = 1;
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break;
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case 1:
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if (!autoinversion) break;
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fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
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ready = 1;
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break;
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case 2:
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if (fepriv->lnb_drift == 0) break;
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fepriv->lnb_drift = -fepriv->lnb_drift;
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ready = 1;
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break;
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case 3:
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if (fepriv->lnb_drift == 0) break;
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if (!autoinversion) break;
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fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF;
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fepriv->lnb_drift = -fepriv->lnb_drift;
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ready = 1;
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break;
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default:
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fepriv->auto_step++;
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fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */
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break;
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}
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if (!ready) fepriv->auto_sub_step++;
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}
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/* if this attempt would hit where we started, indicate a complete
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* iteration has occurred */
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if ((fepriv->auto_step == fepriv->started_auto_step) &&
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(fepriv->auto_sub_step == 0) && check_wrapped) {
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return 1;
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}
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dprintk("%s: drift:%i inversion:%i auto_step:%i "
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"auto_sub_step:%i started_auto_step:%i\n",
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__FUNCTION__, fepriv->lnb_drift, fepriv->inversion,
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fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step);
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/* set the frontend itself */
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fepriv->parameters.frequency += fepriv->lnb_drift;
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if (autoinversion)
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fepriv->parameters.inversion = fepriv->inversion;
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if (fe->ops->set_frontend)
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fe->ops->set_frontend(fe, &fepriv->parameters);
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fepriv->parameters.frequency = original_frequency;
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fepriv->parameters.inversion = original_inversion;
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fepriv->auto_sub_step++;
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return 0;
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}
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static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
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{
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fe_status_t s;
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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/* if we've got no parameters, just keep idling */
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if (fepriv->state & FESTATE_IDLE) {
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fepriv->delay = 3*HZ;
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fepriv->quality = 0;
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return;
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}
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/* in SCAN mode, we just set the frontend when asked and leave it alone */
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if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) {
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if (fepriv->state & FESTATE_RETUNE) {
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if (fe->ops->set_frontend)
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fe->ops->set_frontend(fe, &fepriv->parameters);
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fepriv->state = FESTATE_TUNED;
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}
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fepriv->delay = 3*HZ;
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fepriv->quality = 0;
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return;
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}
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/* get the frontend status */
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if (fepriv->state & FESTATE_RETUNE) {
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s = 0;
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} else {
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if (fe->ops->read_status)
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fe->ops->read_status(fe, &s);
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if (s != fepriv->status) {
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dvb_frontend_add_event(fe, s);
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fepriv->status = s;
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}
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}
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/* if we're not tuned, and we have a lock, move to the TUNED state */
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if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) {
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dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
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fepriv->state = FESTATE_TUNED;
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/* if we're tuned, then we have determined the correct inversion */
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if ((!(fe->ops->info.caps & FE_CAN_INVERSION_AUTO)) &&
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(fepriv->parameters.inversion == INVERSION_AUTO)) {
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fepriv->parameters.inversion = fepriv->inversion;
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}
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return;
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}
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/* if we are tuned already, check we're still locked */
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if (fepriv->state & FESTATE_TUNED) {
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dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
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/* we're tuned, and the lock is still good... */
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if (s & FE_HAS_LOCK) {
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return;
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} else { /* if we _WERE_ tuned, but now don't have a lock */
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fepriv->state = FESTATE_ZIGZAG_FAST;
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fepriv->started_auto_step = fepriv->auto_step;
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fepriv->check_wrapped = 0;
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}
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}
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/* don't actually do anything if we're in the LOSTLOCK state,
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* the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */
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if ((fepriv->state & FESTATE_LOSTLOCK) &&
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(fe->ops->info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) {
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dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
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return;
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}
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/* don't do anything if we're in the DISEQC state, since this
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* might be someone with a motorized dish controlled by DISEQC.
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* If its actually a re-tune, there will be a SET_FRONTEND soon enough. */
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if (fepriv->state & FESTATE_DISEQC) {
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dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
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return;
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}
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/* if we're in the RETUNE state, set everything up for a brand
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* new scan, keeping the current inversion setting, as the next
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* tune is _very_ likely to require the same */
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if (fepriv->state & FESTATE_RETUNE) {
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fepriv->lnb_drift = 0;
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fepriv->auto_step = 0;
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fepriv->auto_sub_step = 0;
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fepriv->started_auto_step = 0;
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fepriv->check_wrapped = 0;
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}
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/* fast zigzag. */
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if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) {
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fepriv->delay = fepriv->min_delay;
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/* peform a tune */
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if (dvb_frontend_swzigzag_autotune(fe, fepriv->check_wrapped)) {
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/* OK, if we've run out of trials at the fast speed.
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* Drop back to slow for the _next_ attempt */
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fepriv->state = FESTATE_SEARCHING_SLOW;
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fepriv->started_auto_step = fepriv->auto_step;
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return;
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}
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fepriv->check_wrapped = 1;
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/* if we've just retuned, enter the ZIGZAG_FAST state.
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* This ensures we cannot return from an
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* FE_SET_FRONTEND ioctl before the first frontend tune
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* occurs */
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if (fepriv->state & FESTATE_RETUNE) {
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fepriv->state = FESTATE_TUNING_FAST;
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}
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}
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/* slow zigzag */
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if (fepriv->state & FESTATE_SEARCHING_SLOW) {
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dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK);
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/* Note: don't bother checking for wrapping; we stay in this
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* state until we get a lock */
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dvb_frontend_swzigzag_autotune(fe, 0);
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}
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}
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static int dvb_frontend_is_exiting(struct dvb_frontend *fe)
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{
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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if (fepriv->exit)
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return 1;
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if (fepriv->dvbdev->writers == 1)
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if (time_after(jiffies, fepriv->release_jiffies +
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dvb_shutdown_timeout * HZ))
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return 1;
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return 0;
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}
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static int dvb_frontend_should_wakeup(struct dvb_frontend *fe)
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{
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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if (fepriv->wakeup) {
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fepriv->wakeup = 0;
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return 1;
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}
|
|
return dvb_frontend_is_exiting(fe);
|
|
}
|
|
|
|
static void dvb_frontend_wakeup(struct dvb_frontend *fe)
|
|
{
|
|
struct dvb_frontend_private *fepriv = fe->frontend_priv;
|
|
|
|
fepriv->wakeup = 1;
|
|
wake_up_interruptible(&fepriv->wait_queue);
|
|
}
|
|
|
|
static int dvb_frontend_thread(void *data)
|
|
{
|
|
struct dvb_frontend *fe = data;
|
|
struct dvb_frontend_private *fepriv = fe->frontend_priv;
|
|
unsigned long timeout;
|
|
char name [15];
|
|
fe_status_t s;
|
|
struct dvb_frontend_parameters *params;
|
|
|
|
dprintk("%s\n", __FUNCTION__);
|
|
|
|
snprintf (name, sizeof(name), "kdvb-fe-%i", fe->dvb->num);
|
|
|
|
lock_kernel();
|
|
daemonize(name);
|
|
sigfillset(¤t->blocked);
|
|
unlock_kernel();
|
|
|
|
fepriv->check_wrapped = 0;
|
|
fepriv->quality = 0;
|
|
fepriv->delay = 3*HZ;
|
|
fepriv->status = 0;
|
|
dvb_frontend_init(fe);
|
|
fepriv->wakeup = 0;
|
|
|
|
while (1) {
|
|
up(&fepriv->sem); /* is locked when we enter the thread... */
|
|
|
|
timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
|
|
dvb_frontend_should_wakeup(fe),
|
|
fepriv->delay);
|
|
if (0 != dvb_frontend_is_exiting(fe)) {
|
|
/* got signal or quitting */
|
|
break;
|
|
}
|
|
|
|
try_to_freeze();
|
|
|
|
if (down_interruptible(&fepriv->sem))
|
|
break;
|
|
|
|
/* do an iteration of the tuning loop */
|
|
if (fe->ops->tune) {
|
|
/* have we been asked to retune? */
|
|
params = NULL;
|
|
if (fepriv->state & FESTATE_RETUNE) {
|
|
params = &fepriv->parameters;
|
|
fepriv->state = FESTATE_TUNED;
|
|
}
|
|
|
|
fe->ops->tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
|
|
if (s != fepriv->status) {
|
|
dvb_frontend_add_event(fe, s);
|
|
fepriv->status = s;
|
|
}
|
|
} else {
|
|
dvb_frontend_swzigzag(fe);
|
|
}
|
|
}
|
|
|
|
if (dvb_shutdown_timeout) {
|
|
if (dvb_powerdown_on_sleep)
|
|
if (fe->ops->set_voltage)
|
|
fe->ops->set_voltage(fe, SEC_VOLTAGE_OFF);
|
|
if (fe->ops->sleep)
|
|
fe->ops->sleep(fe);
|
|
}
|
|
|
|
fepriv->thread_pid = 0;
|
|
mb();
|
|
|
|
dvb_frontend_wakeup(fe);
|
|
return 0;
|
|
}
|
|
|
|
static void dvb_frontend_stop(struct dvb_frontend *fe)
|
|
{
|
|
unsigned long ret;
|
|
struct dvb_frontend_private *fepriv = fe->frontend_priv;
|
|
|
|
dprintk ("%s\n", __FUNCTION__);
|
|
|
|
fepriv->exit = 1;
|
|
mb();
|
|
|
|
if (!fepriv->thread_pid)
|
|
return;
|
|
|
|
/* check if the thread is really alive */
|
|
if (kill_proc(fepriv->thread_pid, 0, 1) == -ESRCH) {
|
|
printk("dvb_frontend_stop: thread PID %d already died\n",
|
|
fepriv->thread_pid);
|
|
/* make sure the mutex was not held by the thread */
|
|
init_MUTEX (&fepriv->sem);
|
|
return;
|
|
}
|
|
|
|
/* wake up the frontend thread, so it notices that fe->exit == 1 */
|
|
dvb_frontend_wakeup(fe);
|
|
|
|
/* wait until the frontend thread has exited */
|
|
ret = wait_event_interruptible(fepriv->wait_queue,0 == fepriv->thread_pid);
|
|
if (-ERESTARTSYS != ret) {
|
|
fepriv->state = FESTATE_IDLE;
|
|
return;
|
|
}
|
|
fepriv->state = FESTATE_IDLE;
|
|
|
|
/* paranoia check in case a signal arrived */
|
|
if (fepriv->thread_pid)
|
|
printk("dvb_frontend_stop: warning: thread PID %d won't exit\n",
|
|
fepriv->thread_pid);
|
|
}
|
|
|
|
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;
|
|
|
|
dprintk ("%s\n", __FUNCTION__);
|
|
|
|
if (fepriv->thread_pid) {
|
|
if (!fepriv->exit)
|
|
return 0;
|
|
else
|
|
dvb_frontend_stop (fe);
|
|
}
|
|
|
|
if (signal_pending(current))
|
|
return -EINTR;
|
|
if (down_interruptible (&fepriv->sem))
|
|
return -EINTR;
|
|
|
|
fepriv->state = FESTATE_IDLE;
|
|
fepriv->exit = 0;
|
|
fepriv->thread_pid = 0;
|
|
mb();
|
|
|
|
ret = kernel_thread (dvb_frontend_thread, fe, 0);
|
|
|
|
if (ret < 0) {
|
|
printk("dvb_frontend_start: failed to start kernel_thread (%d)\n", ret);
|
|
up(&fepriv->sem);
|
|
return ret;
|
|
}
|
|
fepriv->thread_pid = ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, void *parg)
|
|
{
|
|
struct dvb_device *dvbdev = file->private_data;
|
|
struct dvb_frontend *fe = dvbdev->priv;
|
|
struct dvb_frontend_private *fepriv = fe->frontend_priv;
|
|
int err = -EOPNOTSUPP;
|
|
|
|
dprintk ("%s\n", __FUNCTION__);
|
|
|
|
if (!fe || fepriv->exit)
|
|
return -ENODEV;
|
|
|
|
if ((file->f_flags & O_ACCMODE) == O_RDONLY &&
|
|
(_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT ||
|
|
cmd == FE_DISEQC_RECV_SLAVE_REPLY))
|
|
return -EPERM;
|
|
|
|
if (down_interruptible (&fepriv->sem))
|
|
return -ERESTARTSYS;
|
|
|
|
switch (cmd) {
|
|
case FE_GET_INFO: {
|
|
struct dvb_frontend_info* info = parg;
|
|
memcpy(info, &fe->ops->info, sizeof(struct dvb_frontend_info));
|
|
|
|
/* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't
|
|
* do it, it is done for it. */
|
|
info->caps |= FE_CAN_INVERSION_AUTO;
|
|
err = 0;
|
|
break;
|
|
}
|
|
|
|
case FE_READ_STATUS: {
|
|
fe_status_t* status = parg;
|
|
|
|
/* if retune was requested but hasn't occured yet, prevent
|
|
* that user get signal state from previous tuning */
|
|
if(fepriv->state == FESTATE_RETUNE) {
|
|
err=0;
|
|
*status = 0;
|
|
break;
|
|
}
|
|
|
|
if (fe->ops->read_status)
|
|
err = fe->ops->read_status(fe, status);
|
|
break;
|
|
}
|
|
case FE_READ_BER:
|
|
if (fe->ops->read_ber)
|
|
err = fe->ops->read_ber(fe, (__u32*) parg);
|
|
break;
|
|
|
|
case FE_READ_SIGNAL_STRENGTH:
|
|
if (fe->ops->read_signal_strength)
|
|
err = fe->ops->read_signal_strength(fe, (__u16*) parg);
|
|
break;
|
|
|
|
case FE_READ_SNR:
|
|
if (fe->ops->read_snr)
|
|
err = fe->ops->read_snr(fe, (__u16*) parg);
|
|
break;
|
|
|
|
case FE_READ_UNCORRECTED_BLOCKS:
|
|
if (fe->ops->read_ucblocks)
|
|
err = fe->ops->read_ucblocks(fe, (__u32*) parg);
|
|
break;
|
|
|
|
|
|
case FE_DISEQC_RESET_OVERLOAD:
|
|
if (fe->ops->diseqc_reset_overload) {
|
|
err = fe->ops->diseqc_reset_overload(fe);
|
|
fepriv->state = FESTATE_DISEQC;
|
|
fepriv->status = 0;
|
|
}
|
|
break;
|
|
|
|
case FE_DISEQC_SEND_MASTER_CMD:
|
|
if (fe->ops->diseqc_send_master_cmd) {
|
|
err = fe->ops->diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg);
|
|
fepriv->state = FESTATE_DISEQC;
|
|
fepriv->status = 0;
|
|
}
|
|
break;
|
|
|
|
case FE_DISEQC_SEND_BURST:
|
|
if (fe->ops->diseqc_send_burst) {
|
|
err = fe->ops->diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg);
|
|
fepriv->state = FESTATE_DISEQC;
|
|
fepriv->status = 0;
|
|
}
|
|
break;
|
|
|
|
case FE_SET_TONE:
|
|
if (fe->ops->set_tone) {
|
|
err = fe->ops->set_tone(fe, (fe_sec_tone_mode_t) parg);
|
|
fepriv->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->state = FESTATE_DISEQC;
|
|
fepriv->status = 0;
|
|
}
|
|
break;
|
|
|
|
case FE_DISHNETWORK_SEND_LEGACY_CMD:
|
|
if (fe->ops->dishnetwork_send_legacy_command) {
|
|
err = fe->ops->dishnetwork_send_legacy_command(fe, (unsigned long) parg);
|
|
fepriv->state = FESTATE_DISEQC;
|
|
fepriv->status = 0;
|
|
} else if (fe->ops->set_voltage) {
|
|
/*
|
|
* NOTE: This is a fallback condition. Some frontends
|
|
* (stv0299 for instance) take longer than 8msec to
|
|
* respond to a set_voltage command. Those switches
|
|
* need custom routines to switch properly. For all
|
|
* other frontends, the following shoule work ok.
|
|
* Dish network legacy switches (as used by Dish500)
|
|
* are controlled by sending 9-bit command words
|
|
* spaced 8msec apart.
|
|
* the actual command word is switch/port dependant
|
|
* so it is up to the userspace application to send
|
|
* the right command.
|
|
* The command must always start with a '0' after
|
|
* initialization, so parg is 8 bits and does not
|
|
* include the initialization or start bit
|
|
*/
|
|
unsigned long cmd = ((unsigned long) parg) << 1;
|
|
struct timeval nexttime;
|
|
struct timeval tv[10];
|
|
int i;
|
|
u8 last = 1;
|
|
if (dvb_frontend_debug)
|
|
printk("%s switch command: 0x%04lx\n", __FUNCTION__, cmd);
|
|
do_gettimeofday(&nexttime);
|
|
if (dvb_frontend_debug)
|
|
memcpy(&tv[0], &nexttime, sizeof(struct timeval));
|
|
/* before sending a command, initialize by sending
|
|
* a 32ms 18V to the switch
|
|
*/
|
|
fe->ops->set_voltage(fe, SEC_VOLTAGE_18);
|
|
dvb_frontend_sleep_until(&nexttime, 32000);
|
|
|
|
for (i = 0; i < 9; i++) {
|
|
if (dvb_frontend_debug)
|
|
do_gettimeofday(&tv[i + 1]);
|
|
if ((cmd & 0x01) != last) {
|
|
/* set voltage to (last ? 13V : 18V) */
|
|
fe->ops->set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
|
|
last = (last) ? 0 : 1;
|
|
}
|
|
cmd = cmd >> 1;
|
|
if (i != 8)
|
|
dvb_frontend_sleep_until(&nexttime, 8000);
|
|
}
|
|
if (dvb_frontend_debug) {
|
|
printk("%s(%d): switch delay (should be 32k followed by all 8k\n",
|
|
__FUNCTION__, fe->dvb->num);
|
|
for (i = 1; i < 10; i++)
|
|
printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
|
|
}
|
|
err = 0;
|
|
fepriv->state = FESTATE_DISEQC;
|
|
fepriv->status = 0;
|
|
}
|
|
break;
|
|
|
|
case FE_DISEQC_RECV_SLAVE_REPLY:
|
|
if (fe->ops->diseqc_recv_slave_reply)
|
|
err = fe->ops->diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg);
|
|
break;
|
|
|
|
case FE_ENABLE_HIGH_LNB_VOLTAGE:
|
|
if (fe->ops->enable_high_lnb_voltage)
|
|
err = fe->ops->enable_high_lnb_voltage(fe, (long) parg);
|
|
break;
|
|
|
|
case FE_SET_FRONTEND: {
|
|
struct dvb_frontend_tune_settings fetunesettings;
|
|
|
|
memcpy (&fepriv->parameters, parg,
|
|
sizeof (struct dvb_frontend_parameters));
|
|
|
|
memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings));
|
|
memcpy(&fetunesettings.parameters, parg,
|
|
sizeof (struct dvb_frontend_parameters));
|
|
|
|
/* force auto frequency inversion if requested */
|
|
if (dvb_force_auto_inversion) {
|
|
fepriv->parameters.inversion = INVERSION_AUTO;
|
|
fetunesettings.parameters.inversion = INVERSION_AUTO;
|
|
}
|
|
if (fe->ops->info.type == FE_OFDM) {
|
|
/* without hierachical coding code_rate_LP is irrelevant,
|
|
* so we tolerate the otherwise invalid FEC_NONE setting */
|
|
if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE &&
|
|
fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE)
|
|
fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO;
|
|
}
|
|
|
|
/* get frontend-specific tuning settings */
|
|
if (fe->ops->get_tune_settings && (fe->ops->get_tune_settings(fe, &fetunesettings) == 0)) {
|
|
fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000;
|
|
fepriv->max_drift = fetunesettings.max_drift;
|
|
fepriv->step_size = fetunesettings.step_size;
|
|
} else {
|
|
/* default values */
|
|
switch(fe->ops->info.type) {
|
|
case FE_QPSK:
|
|
fepriv->min_delay = HZ/20;
|
|
fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000;
|
|
fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000;
|
|
break;
|
|
|
|
case FE_QAM:
|
|
fepriv->min_delay = HZ/20;
|
|
fepriv->step_size = 0; /* no zigzag */
|
|
fepriv->max_drift = 0;
|
|
break;
|
|
|
|
case FE_OFDM:
|
|
fepriv->min_delay = HZ/20;
|
|
fepriv->step_size = fe->ops->info.frequency_stepsize * 2;
|
|
fepriv->max_drift = (fe->ops->info.frequency_stepsize * 2) + 1;
|
|
break;
|
|
case FE_ATSC:
|
|
printk("dvb-core: FE_ATSC not handled yet.\n");
|
|
break;
|
|
}
|
|
}
|
|
if (dvb_override_tune_delay > 0)
|
|
fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000;
|
|
|
|
fepriv->state = FESTATE_RETUNE;
|
|
dvb_frontend_wakeup(fe);
|
|
dvb_frontend_add_event(fe, 0);
|
|
fepriv->status = 0;
|
|
err = 0;
|
|
break;
|
|
}
|
|
|
|
case FE_GET_EVENT:
|
|
err = dvb_frontend_get_event (fe, parg, file->f_flags);
|
|
break;
|
|
|
|
case FE_GET_FRONTEND:
|
|
if (fe->ops->get_frontend) {
|
|
memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters));
|
|
err = fe->ops->get_frontend(fe, (struct dvb_frontend_parameters*) parg);
|
|
}
|
|
break;
|
|
|
|
case FE_SET_FRONTEND_TUNE_MODE:
|
|
fepriv->tune_mode_flags = (unsigned long) parg;
|
|
break;
|
|
};
|
|
|
|
up (&fepriv->sem);
|
|
return err;
|
|
}
|
|
|
|
static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait)
|
|
{
|
|
struct dvb_device *dvbdev = file->private_data;
|
|
struct dvb_frontend *fe = dvbdev->priv;
|
|
struct dvb_frontend_private *fepriv = fe->frontend_priv;
|
|
|
|
dprintk ("%s\n", __FUNCTION__);
|
|
|
|
poll_wait (file, &fepriv->events.wait_queue, wait);
|
|
|
|
if (fepriv->events.eventw != fepriv->events.eventr)
|
|
return (POLLIN | POLLRDNORM | POLLPRI);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_frontend_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct dvb_device *dvbdev = file->private_data;
|
|
struct dvb_frontend *fe = dvbdev->priv;
|
|
struct dvb_frontend_private *fepriv = fe->frontend_priv;
|
|
int ret;
|
|
|
|
dprintk ("%s\n", __FUNCTION__);
|
|
|
|
if ((ret = dvb_generic_open (inode, file)) < 0)
|
|
return ret;
|
|
|
|
if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
|
|
ret = dvb_frontend_start (fe);
|
|
if (ret)
|
|
dvb_generic_release (inode, file);
|
|
|
|
/* empty event queue */
|
|
fepriv->events.eventr = fepriv->events.eventw = 0;
|
|
|
|
/* normal tune mode when opened R/W */
|
|
fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT;
|
|
}
|
|
|
|
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;
|
|
|
|
dprintk ("%s\n", __FUNCTION__);
|
|
|
|
if ((file->f_flags & O_ACCMODE) != O_RDONLY)
|
|
fepriv->release_jiffies = jiffies;
|
|
|
|
return dvb_generic_release (inode, file);
|
|
}
|
|
|
|
static struct file_operations dvb_frontend_fops = {
|
|
.owner = THIS_MODULE,
|
|
.ioctl = dvb_generic_ioctl,
|
|
.poll = dvb_frontend_poll,
|
|
.open = dvb_frontend_open,
|
|
.release = dvb_frontend_release
|
|
};
|
|
|
|
int dvb_register_frontend(struct dvb_adapter* dvb,
|
|
struct dvb_frontend* fe)
|
|
{
|
|
struct dvb_frontend_private *fepriv;
|
|
static const struct dvb_device dvbdev_template = {
|
|
.users = ~0,
|
|
.writers = 1,
|
|
.readers = (~0)-1,
|
|
.fops = &dvb_frontend_fops,
|
|
.kernel_ioctl = dvb_frontend_ioctl
|
|
};
|
|
|
|
dprintk ("%s\n", __FUNCTION__);
|
|
|
|
if (down_interruptible (&frontend_mutex))
|
|
return -ERESTARTSYS;
|
|
|
|
fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL);
|
|
if (fe->frontend_priv == NULL) {
|
|
up(&frontend_mutex);
|
|
return -ENOMEM;
|
|
}
|
|
fepriv = fe->frontend_priv;
|
|
|
|
init_MUTEX (&fepriv->sem);
|
|
init_waitqueue_head (&fepriv->wait_queue);
|
|
init_waitqueue_head (&fepriv->events.wait_queue);
|
|
init_MUTEX (&fepriv->events.sem);
|
|
fe->dvb = dvb;
|
|
fepriv->inversion = INVERSION_OFF;
|
|
|
|
printk ("DVB: registering frontend %i (%s)...\n",
|
|
fe->dvb->num,
|
|
fe->ops->info.name);
|
|
|
|
dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template,
|
|
fe, DVB_DEVICE_FRONTEND);
|
|
|
|
up (&frontend_mutex);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(dvb_register_frontend);
|
|
|
|
int dvb_unregister_frontend(struct dvb_frontend* fe)
|
|
{
|
|
struct dvb_frontend_private *fepriv = fe->frontend_priv;
|
|
dprintk ("%s\n", __FUNCTION__);
|
|
|
|
down (&frontend_mutex);
|
|
dvb_unregister_device (fepriv->dvbdev);
|
|
dvb_frontend_stop (fe);
|
|
if (fe->ops->release)
|
|
fe->ops->release(fe);
|
|
else
|
|
printk("dvb_frontend: Demodulator (%s) does not have a release callback!\n", fe->ops->info.name);
|
|
/* fe is invalid now */
|
|
kfree(fepriv);
|
|
up (&frontend_mutex);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(dvb_unregister_frontend);
|