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14e3cdbb00
A bugfix introduce a link failure in configurations without CONFIG_MODULES: In file included from drivers/media/usb/dvb-usb/pctv452e.c:20:0: drivers/media/usb/dvb-usb/pctv452e.c: In function 'pctv452e_frontend_attach': drivers/media/dvb-frontends/stb0899_drv.h:151:36: error: weak declaration of 'stb0899_attach' being applied to a already existing, static definition The problem is that the !IS_REACHABLE() declaration of stb0899_attach() is a 'static inline' definition that clashes with the weak definition. I further observed that the bugfix was only done for one of the five users of stb0899_attach(), the other four still have the problem. This reverts the bugfix and instead addresses the problem by not dropping the reference count when calling '->detach()', instead we call this function directly in dvb_frontend_put() before dropping the kref on the front-end. I first submitted this in early 2018, and after some discussion it was apparently discarded. While there is a long-term plan in place, that plan is obviously not nearing completion yet, and the current kernel is still broken unless this patch is applied. Link: https://patchwork.kernel.org/patch/10140175/ Link: https://patchwork.linuxtv.org/patch/54831/ Cc: Max Kellermann <max.kellermann@gmail.com> Cc: Wolfgang Rohdewald <wolfgang@rohdewald.de> Cc: stable@vger.kernel.org Fixes:f686c14364
("[media] stb0899: move code to "detach" callback") Fixes:6cdeaed3b1
("media: dvb_usb_pctv452e: module refcount changes were unbalanced") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
3049 lines
80 KiB
C
3049 lines
80 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* dvb_frontend.c: DVB frontend tuning interface/thread
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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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/* Enables DVBv3 compatibility bits at the headers */
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#define __DVB_CORE__
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#define pr_fmt(fmt) "dvb_frontend: " fmt
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/sched/signal.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/semaphore.h>
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#include <linux/module.h>
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#include <linux/list.h>
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#include <linux/freezer.h>
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#include <linux/jiffies.h>
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#include <linux/kthread.h>
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#include <linux/ktime.h>
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#include <linux/compat.h>
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#include <asm/processor.h>
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#include <media/dvb_frontend.h>
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#include <media/dvbdev.h>
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#include <linux/dvb/version.h>
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static int dvb_frontend_debug;
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static int dvb_shutdown_timeout;
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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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static int dvb_mfe_wait_time = 5;
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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, 0644);
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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, 0644);
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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, 0644);
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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, 0644);
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MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)");
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module_param(dvb_mfe_wait_time, int, 0644);
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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)");
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#define dprintk(fmt, arg...) \
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printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg)
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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_ERROR 256
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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 DEFINE_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_out;
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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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struct task_struct *thread;
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unsigned long release_jiffies;
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unsigned int wakeup;
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enum fe_status status;
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unsigned long tune_mode_flags;
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unsigned int delay;
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unsigned int reinitialise;
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int tone;
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int voltage;
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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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enum dvbfe_search algo_status;
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#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
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struct media_pipeline pipe;
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#endif
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};
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static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
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void (*release)(struct dvb_frontend *fe));
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static void __dvb_frontend_free(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)
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dvb_free_device(fepriv->dvbdev);
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dvb_frontend_invoke_release(fe, fe->ops.release);
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kfree(fepriv);
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}
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static void dvb_frontend_free(struct kref *ref)
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{
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struct dvb_frontend *fe =
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container_of(ref, struct dvb_frontend, refcount);
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__dvb_frontend_free(fe);
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}
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static void dvb_frontend_put(struct dvb_frontend *fe)
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{
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/* call detach before dropping the reference count */
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if (fe->ops.detach)
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fe->ops.detach(fe);
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/*
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* Check if the frontend was registered, as otherwise
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* kref was not initialized yet.
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*/
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if (fe->frontend_priv)
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kref_put(&fe->refcount, dvb_frontend_free);
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else
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__dvb_frontend_free(fe);
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}
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static void dvb_frontend_get(struct dvb_frontend *fe)
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{
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kref_get(&fe->refcount);
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}
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static void dvb_frontend_wakeup(struct dvb_frontend *fe);
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static int dtv_get_frontend(struct dvb_frontend *fe,
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struct dtv_frontend_properties *c,
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struct dvb_frontend_parameters *p_out);
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static int
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dtv_property_legacy_params_sync(struct dvb_frontend *fe,
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const struct dtv_frontend_properties *c,
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struct dvb_frontend_parameters *p);
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static bool has_get_frontend(struct dvb_frontend *fe)
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{
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return fe->ops.get_frontend;
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}
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/*
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* Due to DVBv3 API calls, a delivery system should be mapped into one of
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* the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC),
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* otherwise, a DVBv3 call will fail.
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*/
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enum dvbv3_emulation_type {
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DVBV3_UNKNOWN,
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DVBV3_QPSK,
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DVBV3_QAM,
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DVBV3_OFDM,
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DVBV3_ATSC,
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};
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static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system)
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{
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switch (delivery_system) {
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case SYS_DVBC_ANNEX_A:
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case SYS_DVBC_ANNEX_C:
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return DVBV3_QAM;
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case SYS_DVBS:
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case SYS_DVBS2:
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case SYS_TURBO:
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case SYS_ISDBS:
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case SYS_DSS:
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return DVBV3_QPSK;
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case SYS_DVBT:
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case SYS_DVBT2:
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case SYS_ISDBT:
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case SYS_DTMB:
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return DVBV3_OFDM;
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case SYS_ATSC:
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case SYS_ATSCMH:
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case SYS_DVBC_ANNEX_B:
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return DVBV3_ATSC;
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case SYS_UNDEFINED:
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case SYS_ISDBC:
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case SYS_DVBH:
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case SYS_DAB:
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default:
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/*
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* Doesn't know how to emulate those types and/or
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* there's no frontend driver from this type yet
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* with some emulation code, so, we're not sure yet how
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* to handle them, or they're not compatible with a DVBv3 call.
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*/
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return DVBV3_UNKNOWN;
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}
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}
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static void dvb_frontend_add_event(struct dvb_frontend *fe,
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enum fe_status status)
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{
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache;
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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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dev_dbg(fe->dvb->device, "%s:\n", __func__);
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if ((status & FE_HAS_LOCK) && has_get_frontend(fe))
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dtv_get_frontend(fe, c, &fepriv->parameters_out);
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mutex_lock(&events->mtx);
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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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e->status = status;
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e->parameters = fepriv->parameters_out;
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events->eventw = wp;
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mutex_unlock(&events->mtx);
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wake_up_interruptible(&events->wait_queue);
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}
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static int dvb_frontend_test_event(struct dvb_frontend_private *fepriv,
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struct dvb_fe_events *events)
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{
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int ret;
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up(&fepriv->sem);
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ret = events->eventw != events->eventr;
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down(&fepriv->sem);
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return ret;
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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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dev_dbg(fe->dvb->device, "%s:\n", __func__);
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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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ret = wait_event_interruptible(events->wait_queue,
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dvb_frontend_test_event(fepriv, events));
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if (ret < 0)
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return ret;
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}
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mutex_lock(&events->mtx);
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*event = events->events[events->eventr];
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events->eventr = (events->eventr + 1) % MAX_EVENT;
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mutex_unlock(&events->mtx);
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return 0;
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}
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static void dvb_frontend_clear_events(struct dvb_frontend *fe)
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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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mutex_lock(&events->mtx);
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events->eventr = events->eventw;
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mutex_unlock(&events->mtx);
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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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dev_dbg(fe->dvb->device,
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"%s: initialising adapter %i frontend %i (%s)...\n",
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__func__, fe->dvb->num, fe->id, fe->ops.info.name);
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if (fe->ops.init)
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fe->ops.init(fe);
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if (fe->ops.tuner_ops.init) {
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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fe->ops.tuner_ops.init(fe);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0);
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}
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}
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void dvb_frontend_reinitialise(struct dvb_frontend *fe)
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{
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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fepriv->reinitialise = 1;
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dvb_frontend_wakeup(fe);
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}
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EXPORT_SYMBOL(dvb_frontend_reinitialise);
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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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struct dvb_frontend *fe = fepriv->dvbdev->priv;
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dev_dbg(fe->dvb->device, "%s:\n", __func__);
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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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* dvb_frontend_swzigzag_autotune - Performs automatic twiddling of frontend
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* parameters.
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*
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* @fe: The frontend concerned.
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* @check_wrapped: Checks if an iteration has completed.
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* DO NOT SET ON THE FIRST ATTEMPT.
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*
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* return: 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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int fe_set_err = 0;
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struct dvb_frontend_private *fepriv = fe->frontend_priv;
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struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp;
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int original_inversion = c->inversion;
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u32 original_frequency = c->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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(c->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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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)
|
|
{
|
|
enum fe_status s = FE_NONE;
|
|
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 re-tuned, 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 dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
struct dvb_frontend_private *fepriv = fe->frontend_priv;
|
|
enum fe_status s = FE_NONE;
|
|
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, c, &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);
|
|
}
|
|
|
|
/*
|
|
* Sleep for the amount of time given by add_usec parameter
|
|
*
|
|
* This needs to be as precise as possible, as it affects the detection of
|
|
* the dish tone command at the satellite subsystem. The precision is improved
|
|
* by using a scheduled msleep followed by udelay for the remainder.
|
|
*/
|
|
void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec)
|
|
{
|
|
s32 delta;
|
|
|
|
*waketime = ktime_add_us(*waketime, add_usec);
|
|
delta = ktime_us_delta(ktime_get_boottime(), *waketime);
|
|
if (delta > 2500) {
|
|
msleep((delta - 1500) / 1000);
|
|
delta = ktime_us_delta(ktime_get_boottime(), *waketime);
|
|
}
|
|
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,
|
|
u32 *tolerance)
|
|
{
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
u32 tuner_min = fe->ops.tuner_ops.info.frequency_min_hz;
|
|
u32 tuner_max = fe->ops.tuner_ops.info.frequency_max_hz;
|
|
u32 frontend_min = fe->ops.info.frequency_min_hz;
|
|
u32 frontend_max = fe->ops.info.frequency_max_hz;
|
|
|
|
*freq_min = max(frontend_min, tuner_min);
|
|
|
|
if (frontend_max == 0)
|
|
*freq_max = tuner_max;
|
|
else if (tuner_max == 0)
|
|
*freq_max = frontend_max;
|
|
else
|
|
*freq_max = min(frontend_max, tuner_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);
|
|
|
|
dev_dbg(fe->dvb->device, "frequency interval: tuner: %u...%u, frontend: %u...%u",
|
|
tuner_min, tuner_max, frontend_min, frontend_max);
|
|
|
|
/* If the standard is for satellite, convert frequencies to kHz */
|
|
switch (c->delivery_system) {
|
|
case SYS_DVBS:
|
|
case SYS_DVBS2:
|
|
case SYS_TURBO:
|
|
case SYS_ISDBS:
|
|
*freq_min /= kHz;
|
|
*freq_max /= kHz;
|
|
if (tolerance)
|
|
*tolerance = fe->ops.info.frequency_tolerance_hz / kHz;
|
|
|
|
break;
|
|
default:
|
|
if (tolerance)
|
|
*tolerance = fe->ops.info.frequency_tolerance_hz;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static u32 dvb_frontend_get_stepsize(struct dvb_frontend *fe)
|
|
{
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
u32 fe_step = fe->ops.info.frequency_stepsize_hz;
|
|
u32 tuner_step = fe->ops.tuner_ops.info.frequency_step_hz;
|
|
u32 step = max(fe_step, tuner_step);
|
|
|
|
switch (c->delivery_system) {
|
|
case SYS_DVBS:
|
|
case SYS_DVBS2:
|
|
case SYS_TURBO:
|
|
case SYS_ISDBS:
|
|
step /= kHz;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return step;
|
|
}
|
|
|
|
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, NULL);
|
|
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;
|
|
|
|
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 = 7; /* All layers (A,B,C) */
|
|
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;
|
|
c->scrambling_sequence_index = 0;/* default sequence */
|
|
|
|
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;
|
|
case SYS_ISDBS:
|
|
c->symbol_rate = 28860000;
|
|
c->rolloff = ROLLOFF_35;
|
|
c->bandwidth_hz = c->symbol_rate / 100 * 135;
|
|
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 \
|
|
}
|
|
|
|
struct dtv_cmds_h {
|
|
char *name; /* A display name for debugging purposes */
|
|
|
|
__u32 cmd; /* A unique ID */
|
|
|
|
/* Flags */
|
|
__u32 set:1; /* Either a set or get property */
|
|
__u32 buffer:1; /* Does this property use the buffer? */
|
|
__u32 reserved:30; /* Align */
|
|
};
|
|
|
|
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_SCRAMBLING_SEQUENCE_INDEX, 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),
|
|
};
|
|
|
|
/* 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,
|
|
const struct dtv_frontend_properties *c,
|
|
struct dvb_frontend_parameters *p)
|
|
{
|
|
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 dtv_frontend_properties *c,
|
|
struct dvb_frontend_parameters *p_out)
|
|
{
|
|
int r;
|
|
|
|
if (fe->ops.get_frontend) {
|
|
r = fe->ops.get_frontend(fe, c);
|
|
if (unlikely(r < 0))
|
|
return r;
|
|
if (p_out)
|
|
dtv_property_legacy_params_sync(fe, c, p_out);
|
|
return 0;
|
|
}
|
|
|
|
/* As everything is in cache, get_frontend fops are always supported */
|
|
return 0;
|
|
}
|
|
|
|
static int dvb_frontend_handle_ioctl(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 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;
|
|
|
|
/* Physical layer scrambling support */
|
|
case DTV_SCRAMBLING_SEQUENCE_INDEX:
|
|
tvp->u.data = c->scrambling_sequence_index;
|
|
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;
|
|
}
|
|
|
|
if (!dtv_cmds[tvp->cmd].buffer)
|
|
dev_dbg(fe->dvb->device,
|
|
"%s: GET cmd 0x%08x (%s) = 0x%08x\n",
|
|
__func__, tvp->cmd, dtv_cmds[tvp->cmd].name,
|
|
tvp->u.data);
|
|
else
|
|
dev_dbg(fe->dvb->device,
|
|
"%s: GET cmd 0x%08x (%s) len %d: %*ph\n",
|
|
__func__,
|
|
tvp->cmd, dtv_cmds[tvp->cmd].name,
|
|
tvp->u.buffer.len,
|
|
tvp->u.buffer.len, tvp->u.buffer.data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dtv_set_frontend(struct dvb_frontend *fe);
|
|
|
|
static bool is_dvbv3_delsys(u32 delsys)
|
|
{
|
|
return (delsys == SYS_DVBT) || (delsys == SYS_DVBC_ANNEX_A) ||
|
|
(delsys == SYS_DVBS) || (delsys == SYS_ATSC);
|
|
}
|
|
|
|
/**
|
|
* 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 frontend
|
|
* 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);
|
|
}
|
|
|
|
/**
|
|
* dtv_property_process_set - Sets a single DTV property
|
|
* @fe: Pointer to &struct dvb_frontend
|
|
* @file: Pointer to &struct file
|
|
* @cmd: Digital TV command
|
|
* @data: An unsigned 32-bits number
|
|
*
|
|
* This routine assigns the property
|
|
* value to the corresponding member of
|
|
* &struct dtv_frontend_properties
|
|
*
|
|
* Returns:
|
|
* Zero on success, negative errno on failure.
|
|
*/
|
|
static int dtv_property_process_set(struct dvb_frontend *fe,
|
|
struct file *file,
|
|
u32 cmd, u32 data)
|
|
{
|
|
int r = 0;
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
|
|
/** Dump DTV command name and value*/
|
|
if (!cmd || cmd > DTV_MAX_COMMAND)
|
|
dev_warn(fe->dvb->device, "%s: SET cmd 0x%08x undefined\n",
|
|
__func__, cmd);
|
|
else
|
|
dev_dbg(fe->dvb->device,
|
|
"%s: SET cmd 0x%08x (%s) to 0x%08x\n",
|
|
__func__, cmd, dtv_cmds[cmd].name, data);
|
|
switch (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:
|
|
/*
|
|
* Use the cached Digital TV properties to tune the
|
|
* frontend
|
|
*/
|
|
dev_dbg(fe->dvb->device,
|
|
"%s: Setting the frontend from property cache\n",
|
|
__func__);
|
|
|
|
r = dtv_set_frontend(fe);
|
|
break;
|
|
case DTV_FREQUENCY:
|
|
c->frequency = data;
|
|
break;
|
|
case DTV_MODULATION:
|
|
c->modulation = data;
|
|
break;
|
|
case DTV_BANDWIDTH_HZ:
|
|
c->bandwidth_hz = data;
|
|
break;
|
|
case DTV_INVERSION:
|
|
c->inversion = data;
|
|
break;
|
|
case DTV_SYMBOL_RATE:
|
|
c->symbol_rate = data;
|
|
break;
|
|
case DTV_INNER_FEC:
|
|
c->fec_inner = data;
|
|
break;
|
|
case DTV_PILOT:
|
|
c->pilot = data;
|
|
break;
|
|
case DTV_ROLLOFF:
|
|
c->rolloff = data;
|
|
break;
|
|
case DTV_DELIVERY_SYSTEM:
|
|
r = dvbv5_set_delivery_system(fe, data);
|
|
break;
|
|
case DTV_VOLTAGE:
|
|
c->voltage = data;
|
|
r = dvb_frontend_handle_ioctl(file, FE_SET_VOLTAGE,
|
|
(void *)c->voltage);
|
|
break;
|
|
case DTV_TONE:
|
|
c->sectone = data;
|
|
r = dvb_frontend_handle_ioctl(file, FE_SET_TONE,
|
|
(void *)c->sectone);
|
|
break;
|
|
case DTV_CODE_RATE_HP:
|
|
c->code_rate_HP = data;
|
|
break;
|
|
case DTV_CODE_RATE_LP:
|
|
c->code_rate_LP = data;
|
|
break;
|
|
case DTV_GUARD_INTERVAL:
|
|
c->guard_interval = data;
|
|
break;
|
|
case DTV_TRANSMISSION_MODE:
|
|
c->transmission_mode = data;
|
|
break;
|
|
case DTV_HIERARCHY:
|
|
c->hierarchy = data;
|
|
break;
|
|
case DTV_INTERLEAVING:
|
|
c->interleaving = data;
|
|
break;
|
|
|
|
/* ISDB-T Support here */
|
|
case DTV_ISDBT_PARTIAL_RECEPTION:
|
|
c->isdbt_partial_reception = data;
|
|
break;
|
|
case DTV_ISDBT_SOUND_BROADCASTING:
|
|
c->isdbt_sb_mode = data;
|
|
break;
|
|
case DTV_ISDBT_SB_SUBCHANNEL_ID:
|
|
c->isdbt_sb_subchannel = data;
|
|
break;
|
|
case DTV_ISDBT_SB_SEGMENT_IDX:
|
|
c->isdbt_sb_segment_idx = data;
|
|
break;
|
|
case DTV_ISDBT_SB_SEGMENT_COUNT:
|
|
c->isdbt_sb_segment_count = data;
|
|
break;
|
|
case DTV_ISDBT_LAYER_ENABLED:
|
|
c->isdbt_layer_enabled = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERA_FEC:
|
|
c->layer[0].fec = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERA_MODULATION:
|
|
c->layer[0].modulation = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERA_SEGMENT_COUNT:
|
|
c->layer[0].segment_count = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERA_TIME_INTERLEAVING:
|
|
c->layer[0].interleaving = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERB_FEC:
|
|
c->layer[1].fec = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERB_MODULATION:
|
|
c->layer[1].modulation = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERB_SEGMENT_COUNT:
|
|
c->layer[1].segment_count = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERB_TIME_INTERLEAVING:
|
|
c->layer[1].interleaving = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERC_FEC:
|
|
c->layer[2].fec = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERC_MODULATION:
|
|
c->layer[2].modulation = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERC_SEGMENT_COUNT:
|
|
c->layer[2].segment_count = data;
|
|
break;
|
|
case DTV_ISDBT_LAYERC_TIME_INTERLEAVING:
|
|
c->layer[2].interleaving = data;
|
|
break;
|
|
|
|
/* Multistream support */
|
|
case DTV_STREAM_ID:
|
|
case DTV_DVBT2_PLP_ID_LEGACY:
|
|
c->stream_id = data;
|
|
break;
|
|
|
|
/* Physical layer scrambling support */
|
|
case DTV_SCRAMBLING_SEQUENCE_INDEX:
|
|
c->scrambling_sequence_index = data;
|
|
break;
|
|
|
|
/* ATSC-MH */
|
|
case DTV_ATSCMH_PARADE_ID:
|
|
fe->dtv_property_cache.atscmh_parade_id = data;
|
|
break;
|
|
case DTV_ATSCMH_RS_FRAME_ENSEMBLE:
|
|
fe->dtv_property_cache.atscmh_rs_frame_ensemble = data;
|
|
break;
|
|
|
|
case DTV_LNA:
|
|
c->lna = 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_do_ioctl(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;
|
|
|
|
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 the frontend is opened in read-only mode, only the ioctls
|
|
* that don't interfere with the tune logic should be accepted.
|
|
* That allows an external application to monitor the DVB QoS and
|
|
* statistics parameters.
|
|
*
|
|
* That matches all _IOR() ioctls, except for two special cases:
|
|
* - FE_GET_EVENT is part of the tuning logic on a DVB application;
|
|
* - FE_DISEQC_RECV_SLAVE_REPLY is part of DiSEqC 2.0
|
|
* setup
|
|
* So, those two ioctls should also return -EPERM, as otherwise
|
|
* reading from them would interfere with a DVB tune application
|
|
*/
|
|
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;
|
|
}
|
|
|
|
err = dvb_frontend_handle_ioctl(file, cmd, parg);
|
|
|
|
up(&fepriv->sem);
|
|
return err;
|
|
}
|
|
|
|
static long dvb_frontend_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct dvb_device *dvbdev = file->private_data;
|
|
|
|
if (!dvbdev)
|
|
return -ENODEV;
|
|
|
|
return dvb_usercopy(file, cmd, arg, dvb_frontend_do_ioctl);
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
struct compat_dtv_property {
|
|
__u32 cmd;
|
|
__u32 reserved[3];
|
|
union {
|
|
__u32 data;
|
|
struct dtv_fe_stats st;
|
|
struct {
|
|
__u8 data[32];
|
|
__u32 len;
|
|
__u32 reserved1[3];
|
|
compat_uptr_t reserved2;
|
|
} buffer;
|
|
} u;
|
|
int result;
|
|
} __attribute__ ((packed));
|
|
|
|
struct compat_dtv_properties {
|
|
__u32 num;
|
|
compat_uptr_t props;
|
|
};
|
|
|
|
#define COMPAT_FE_SET_PROPERTY _IOW('o', 82, struct compat_dtv_properties)
|
|
#define COMPAT_FE_GET_PROPERTY _IOR('o', 83, struct compat_dtv_properties)
|
|
|
|
static int dvb_frontend_handle_compat_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct dvb_device *dvbdev = file->private_data;
|
|
struct dvb_frontend *fe = dvbdev->priv;
|
|
struct dvb_frontend_private *fepriv = fe->frontend_priv;
|
|
int i, err = 0;
|
|
|
|
if (cmd == COMPAT_FE_SET_PROPERTY) {
|
|
struct compat_dtv_properties prop, *tvps = NULL;
|
|
struct compat_dtv_property *tvp = NULL;
|
|
|
|
if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
|
|
return -EFAULT;
|
|
|
|
tvps = ∝
|
|
|
|
/*
|
|
* Put an arbitrary limit on the number of messages that can
|
|
* be sent at once
|
|
*/
|
|
if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
|
|
return -EINVAL;
|
|
|
|
tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
|
|
if (IS_ERR(tvp))
|
|
return PTR_ERR(tvp);
|
|
|
|
for (i = 0; i < tvps->num; i++) {
|
|
err = dtv_property_process_set(fe, file,
|
|
(tvp + i)->cmd,
|
|
(tvp + i)->u.data);
|
|
if (err < 0) {
|
|
kfree(tvp);
|
|
return err;
|
|
}
|
|
}
|
|
kfree(tvp);
|
|
} else if (cmd == COMPAT_FE_GET_PROPERTY) {
|
|
struct compat_dtv_properties prop, *tvps = NULL;
|
|
struct compat_dtv_property *tvp = NULL;
|
|
struct dtv_frontend_properties getp = fe->dtv_property_cache;
|
|
|
|
if (copy_from_user(&prop, compat_ptr(arg), sizeof(prop)))
|
|
return -EFAULT;
|
|
|
|
tvps = ∝
|
|
|
|
/*
|
|
* Put an arbitrary limit on the number of messages that can
|
|
* be sent at once
|
|
*/
|
|
if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
|
|
return -EINVAL;
|
|
|
|
tvp = memdup_user(compat_ptr(tvps->props), tvps->num * sizeof(*tvp));
|
|
if (IS_ERR(tvp))
|
|
return PTR_ERR(tvp);
|
|
|
|
/*
|
|
* Let's use our own copy of property cache, in order to
|
|
* avoid mangling with DTV zigzag logic, as drivers might
|
|
* return crap, if they don't check if the data is available
|
|
* before updating the properties cache.
|
|
*/
|
|
if (fepriv->state != FESTATE_IDLE) {
|
|
err = dtv_get_frontend(fe, &getp, NULL);
|
|
if (err < 0) {
|
|
kfree(tvp);
|
|
return err;
|
|
}
|
|
}
|
|
for (i = 0; i < tvps->num; i++) {
|
|
err = dtv_property_process_get(
|
|
fe, &getp, (struct dtv_property *)(tvp + i), file);
|
|
if (err < 0) {
|
|
kfree(tvp);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (copy_to_user((void __user *)compat_ptr(tvps->props), tvp,
|
|
tvps->num * sizeof(struct compat_dtv_property))) {
|
|
kfree(tvp);
|
|
return -EFAULT;
|
|
}
|
|
kfree(tvp);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static long dvb_frontend_compat_ioctl(struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct dvb_device *dvbdev = file->private_data;
|
|
struct dvb_frontend *fe = dvbdev->priv;
|
|
struct dvb_frontend_private *fepriv = fe->frontend_priv;
|
|
int err;
|
|
|
|
if (cmd == COMPAT_FE_SET_PROPERTY || cmd == COMPAT_FE_GET_PROPERTY) {
|
|
if (down_interruptible(&fepriv->sem))
|
|
return -ERESTARTSYS;
|
|
|
|
err = dvb_frontend_handle_compat_ioctl(file, cmd, arg);
|
|
|
|
up(&fepriv->sem);
|
|
return err;
|
|
}
|
|
|
|
return dvb_frontend_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
|
|
}
|
|
#endif
|
|
|
|
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, c, &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;
|
|
case SYS_DVBS:
|
|
case SYS_TURBO:
|
|
case SYS_ISDBS:
|
|
rolloff = 135;
|
|
break;
|
|
case SYS_DVBS2:
|
|
switch (c->rolloff) {
|
|
case ROLLOFF_20:
|
|
rolloff = 120;
|
|
break;
|
|
case ROLLOFF_25:
|
|
rolloff = 125;
|
|
break;
|
|
default:
|
|
case ROLLOFF_35:
|
|
rolloff = 135;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (rolloff)
|
|
c->bandwidth_hz = mult_frac(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 = dvb_frontend_get_stepsize(fe) * 2;
|
|
fepriv->max_drift = (dvb_frontend_get_stepsize(fe) * 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_get_property(struct dvb_frontend *fe, struct file *file,
|
|
struct dtv_properties *tvps)
|
|
{
|
|
struct dvb_frontend_private *fepriv = fe->frontend_priv;
|
|
struct dtv_property *tvp = NULL;
|
|
struct dtv_frontend_properties getp;
|
|
int i, err;
|
|
|
|
memcpy(&getp, &fe->dtv_property_cache, sizeof(getp));
|
|
|
|
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 || tvps->num > DTV_IOCTL_MAX_MSGS)
|
|
return -EINVAL;
|
|
|
|
tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
|
|
if (IS_ERR(tvp))
|
|
return PTR_ERR(tvp);
|
|
|
|
/*
|
|
* Let's use our own copy of property cache, in order to
|
|
* avoid mangling with DTV zigzag logic, as drivers might
|
|
* return crap, if they don't check if the data is available
|
|
* before updating the properties cache.
|
|
*/
|
|
if (fepriv->state != FESTATE_IDLE) {
|
|
err = dtv_get_frontend(fe, &getp, NULL);
|
|
if (err < 0)
|
|
goto out;
|
|
}
|
|
for (i = 0; i < tvps->num; i++) {
|
|
err = dtv_property_process_get(fe, &getp,
|
|
tvp + i, file);
|
|
if (err < 0)
|
|
goto out;
|
|
}
|
|
|
|
if (copy_to_user((void __user *)tvps->props, tvp,
|
|
tvps->num * sizeof(struct dtv_property))) {
|
|
err = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
err = 0;
|
|
out:
|
|
kfree(tvp);
|
|
return err;
|
|
}
|
|
|
|
static int dvb_get_frontend(struct dvb_frontend *fe,
|
|
struct dvb_frontend_parameters *p_out)
|
|
{
|
|
struct dtv_frontend_properties getp;
|
|
|
|
/*
|
|
* Let's use our own copy of property cache, in order to
|
|
* avoid mangling with DTV zigzag logic, as drivers might
|
|
* return crap, if they don't check if the data is available
|
|
* before updating the properties cache.
|
|
*/
|
|
memcpy(&getp, &fe->dtv_property_cache, sizeof(getp));
|
|
|
|
return dtv_get_frontend(fe, &getp, p_out);
|
|
}
|
|
|
|
static int dvb_frontend_handle_ioctl(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 i, err = -ENOTSUPP;
|
|
|
|
dev_dbg(fe->dvb->device, "%s:\n", __func__);
|
|
|
|
switch (cmd) {
|
|
case FE_SET_PROPERTY: {
|
|
struct dtv_properties *tvps = parg;
|
|
struct dtv_property *tvp = NULL;
|
|
|
|
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 || (tvps->num > DTV_IOCTL_MAX_MSGS))
|
|
return -EINVAL;
|
|
|
|
tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
|
|
if (IS_ERR(tvp))
|
|
return PTR_ERR(tvp);
|
|
|
|
for (i = 0; i < tvps->num; i++) {
|
|
err = dtv_property_process_set(fe, file,
|
|
(tvp + i)->cmd,
|
|
(tvp + i)->u.data);
|
|
if (err < 0) {
|
|
kfree(tvp);
|
|
return err;
|
|
}
|
|
}
|
|
kfree(tvp);
|
|
err = 0;
|
|
break;
|
|
}
|
|
case FE_GET_PROPERTY:
|
|
err = dvb_get_property(fe, file, parg);
|
|
break;
|
|
|
|
case FE_GET_INFO: {
|
|
struct dvb_frontend_info *info = parg;
|
|
memset(info, 0, sizeof(*info));
|
|
|
|
strscpy(info->name, fe->ops.info.name, sizeof(info->name));
|
|
info->symbol_rate_min = fe->ops.info.symbol_rate_min;
|
|
info->symbol_rate_max = fe->ops.info.symbol_rate_max;
|
|
info->symbol_rate_tolerance = fe->ops.info.symbol_rate_tolerance;
|
|
info->caps = fe->ops.info.caps;
|
|
info->frequency_stepsize = dvb_frontend_get_stepsize(fe);
|
|
dvb_frontend_get_frequency_limits(fe, &info->frequency_min,
|
|
&info->frequency_max,
|
|
&info->frequency_tolerance);
|
|
|
|
/*
|
|
* 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);
|
|
info->type = FE_OFDM;
|
|
}
|
|
dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n",
|
|
__func__, c->delivery_system, info->type);
|
|
|
|
/* Set CAN_INVERSION_AUTO bit on in other than oneshot mode */
|
|
if (!(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT))
|
|
info->caps |= FE_CAN_INVERSION_AUTO;
|
|
err = 0;
|
|
break;
|
|
}
|
|
|
|
case FE_READ_STATUS: {
|
|
enum fe_status *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_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) {
|
|
struct dvb_diseqc_master_cmd *cmd = parg;
|
|
|
|
if (cmd->msg_len > sizeof(cmd->msg)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
err = fe->ops.diseqc_send_master_cmd(fe, cmd);
|
|
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,
|
|
(enum fe_sec_mini_cmd)parg);
|
|
fepriv->state = FESTATE_DISEQC;
|
|
fepriv->status = 0;
|
|
}
|
|
break;
|
|
|
|
case FE_SET_TONE:
|
|
if (fe->ops.set_tone) {
|
|
err = fe->ops.set_tone(fe,
|
|
(enum fe_sec_tone_mode)parg);
|
|
fepriv->tone = (enum fe_sec_tone_mode)parg;
|
|
fepriv->state = FESTATE_DISEQC;
|
|
fepriv->status = 0;
|
|
}
|
|
break;
|
|
|
|
case FE_SET_VOLTAGE:
|
|
if (fe->ops.set_voltage) {
|
|
err = fe->ops.set_voltage(fe,
|
|
(enum fe_sec_voltage)parg);
|
|
fepriv->voltage = (enum fe_sec_voltage)parg;
|
|
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, 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_TUNE_MODE:
|
|
fepriv->tune_mode_flags = (unsigned long)parg;
|
|
err = 0;
|
|
break;
|
|
/* DEPRECATED dish control ioctls */
|
|
|
|
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;
|
|
ktime_t nexttime;
|
|
ktime_t tv[10];
|
|
int i;
|
|
u8 last = 1;
|
|
|
|
if (dvb_frontend_debug)
|
|
dprintk("switch command: 0x%04lx\n",
|
|
swcmd);
|
|
nexttime = ktime_get_boottime();
|
|
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)
|
|
tv[i + 1] = ktime_get_boottime();
|
|
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) {
|
|
dprintk("(adapter %d): switch delay (should be 32k followed by all 8k)\n",
|
|
fe->dvb->num);
|
|
for (i = 1; i < 10; i++)
|
|
pr_info("%d: %d\n", i,
|
|
(int)ktime_us_delta(tv[i], tv[i - 1]));
|
|
}
|
|
err = 0;
|
|
fepriv->state = FESTATE_DISEQC;
|
|
fepriv->status = 0;
|
|
}
|
|
break;
|
|
|
|
/* DEPRECATED statistics ioctls */
|
|
|
|
case FE_READ_BER:
|
|
if (fe->ops.read_ber) {
|
|
if (fepriv->thread)
|
|
err = fe->ops.read_ber(fe, 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, parg);
|
|
else
|
|
err = -EAGAIN;
|
|
}
|
|
break;
|
|
|
|
case FE_READ_SNR:
|
|
if (fe->ops.read_snr) {
|
|
if (fepriv->thread)
|
|
err = fe->ops.read_snr(fe, parg);
|
|
else
|
|
err = -EAGAIN;
|
|
}
|
|
break;
|
|
|
|
case FE_READ_UNCORRECTED_BLOCKS:
|
|
if (fe->ops.read_ucblocks) {
|
|
if (fepriv->thread)
|
|
err = fe->ops.read_ucblocks(fe, parg);
|
|
else
|
|
err = -EAGAIN;
|
|
}
|
|
break;
|
|
|
|
/* DEPRECATED DVBv3 ioctls */
|
|
|
|
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 = dvb_get_frontend(fe, parg);
|
|
break;
|
|
|
|
default:
|
|
return -ENOTSUPP;
|
|
} /* switch */
|
|
|
|
return err;
|
|
}
|
|
|
|
static __poll_t 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 (EPOLLIN | EPOLLRDNORM | EPOLLPRI);
|
|
|
|
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)
|
|
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)) {
|
|
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) {
|
|
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;
|
|
|
|
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
|
|
mutex_lock(&fe->dvb->mdev_lock);
|
|
if (fe->dvb->mdev) {
|
|
mutex_lock(&fe->dvb->mdev->graph_mutex);
|
|
if (fe->dvb->mdev->enable_source)
|
|
ret = fe->dvb->mdev->enable_source(
|
|
dvbdev->entity,
|
|
&fepriv->pipe);
|
|
mutex_unlock(&fe->dvb->mdev->graph_mutex);
|
|
if (ret) {
|
|
mutex_unlock(&fe->dvb->mdev_lock);
|
|
dev_err(fe->dvb->device,
|
|
"Tuner is busy. Error %d\n", ret);
|
|
goto err2;
|
|
}
|
|
}
|
|
mutex_unlock(&fe->dvb->mdev_lock);
|
|
#endif
|
|
ret = dvb_frontend_start(fe);
|
|
if (ret)
|
|
goto err3;
|
|
|
|
/* empty event queue */
|
|
fepriv->events.eventr = fepriv->events.eventw = 0;
|
|
}
|
|
|
|
dvb_frontend_get(fe);
|
|
|
|
if (adapter->mfe_shared)
|
|
mutex_unlock(&adapter->mfe_lock);
|
|
return ret;
|
|
|
|
err3:
|
|
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
|
|
mutex_lock(&fe->dvb->mdev_lock);
|
|
if (fe->dvb->mdev) {
|
|
mutex_lock(&fe->dvb->mdev->graph_mutex);
|
|
if (fe->dvb->mdev->disable_source)
|
|
fe->dvb->mdev->disable_source(dvbdev->entity);
|
|
mutex_unlock(&fe->dvb->mdev->graph_mutex);
|
|
}
|
|
mutex_unlock(&fe->dvb->mdev_lock);
|
|
err2:
|
|
#endif
|
|
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);
|
|
#ifdef CONFIG_MEDIA_CONTROLLER_DVB
|
|
mutex_lock(&fe->dvb->mdev_lock);
|
|
if (fe->dvb->mdev) {
|
|
mutex_lock(&fe->dvb->mdev->graph_mutex);
|
|
if (fe->dvb->mdev->disable_source)
|
|
fe->dvb->mdev->disable_source(dvbdev->entity);
|
|
mutex_unlock(&fe->dvb->mdev->graph_mutex);
|
|
}
|
|
mutex_unlock(&fe->dvb->mdev_lock);
|
|
#endif
|
|
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);
|
|
}
|
|
|
|
dvb_frontend_put(fe);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations dvb_frontend_fops = {
|
|
.owner = THIS_MODULE,
|
|
.unlocked_ioctl = dvb_frontend_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = dvb_frontend_compat_ioctl,
|
|
#endif
|
|
.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.suspend)
|
|
ret = fe->ops.tuner_ops.suspend(fe);
|
|
else 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.resume)
|
|
ret = fe->ops.tuner_ops.resume(fe);
|
|
else if (fe->ops.tuner_ops.init)
|
|
ret = fe->ops.tuner_ops.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);
|
|
|
|
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;
|
|
const struct dvb_device dvbdev_template = {
|
|
.users = ~0,
|
|
.writers = 1,
|
|
.readers = (~0) - 1,
|
|
.fops = &dvb_frontend_fops,
|
|
#if defined(CONFIG_MEDIA_CONTROLLER_DVB)
|
|
.name = fe->ops.info.name,
|
|
#endif
|
|
};
|
|
|
|
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) {
|
|
mutex_unlock(&frontend_mutex);
|
|
return -ENOMEM;
|
|
}
|
|
fepriv = fe->frontend_priv;
|
|
|
|
kref_init(&fe->refcount);
|
|
|
|
/*
|
|
* After initialization, there need to be two references: one
|
|
* for dvb_unregister_frontend(), and another one for
|
|
* dvb_frontend_detach().
|
|
*/
|
|
dvb_frontend_get(fe);
|
|
|
|
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, 0);
|
|
|
|
/*
|
|
* 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);
|
|
dvb_remove_device(fepriv->dvbdev);
|
|
|
|
/* fe is invalid now */
|
|
mutex_unlock(&frontend_mutex);
|
|
dvb_frontend_put(fe);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(dvb_unregister_frontend);
|
|
|
|
static void dvb_frontend_invoke_release(struct dvb_frontend *fe,
|
|
void (*release)(struct dvb_frontend *fe))
|
|
{
|
|
if (release) {
|
|
release(fe);
|
|
#ifdef CONFIG_MEDIA_ATTACH
|
|
dvb_detach(release);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void dvb_frontend_detach(struct dvb_frontend *fe)
|
|
{
|
|
dvb_frontend_invoke_release(fe, fe->ops.release_sec);
|
|
dvb_frontend_invoke_release(fe, fe->ops.tuner_ops.release);
|
|
dvb_frontend_invoke_release(fe, fe->ops.analog_ops.release);
|
|
dvb_frontend_put(fe);
|
|
}
|
|
EXPORT_SYMBOL(dvb_frontend_detach);
|