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3049 lines
80 KiB
3049 lines
80 KiB
// 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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|
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/* Enables DVBv3 compatibility bits at the headers */ |
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#define __DVB_CORE__ |
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|
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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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|
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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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|
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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, |
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"%s: drift:%i inversion:%i auto_step:%i auto_sub_step:%i started_auto_step:%i\n", |
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__func__, fepriv->lnb_drift, fepriv->inversion, |
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fepriv->auto_step, fepriv->auto_sub_step, |
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fepriv->started_auto_step); |
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|
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/* set the frontend itself */ |
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c->frequency += fepriv->lnb_drift; |
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if (autoinversion) |
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c->inversion = fepriv->inversion; |
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tmp = *c; |
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if (fe->ops.set_frontend) |
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fe_set_err = fe->ops.set_frontend(fe); |
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*c = tmp; |
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if (fe_set_err < 0) { |
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fepriv->state = FESTATE_ERROR; |
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return fe_set_err; |
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} |
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c->frequency = original_frequency; |
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c->inversion = original_inversion; |
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|
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fepriv->auto_sub_step++; |
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return 0; |
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} |
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|
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static void dvb_frontend_swzigzag(struct dvb_frontend *fe) |
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{ |
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enum fe_status s = FE_NONE; |
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int retval = 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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|
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/* if we've got no parameters, just keep idling */ |
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if (fepriv->state & FESTATE_IDLE) { |
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fepriv->delay = 3 * HZ; |
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fepriv->quality = 0; |
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return; |
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} |
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|
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/* in SCAN mode, we just set the frontend when asked and leave it alone */ |
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if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { |
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if (fepriv->state & FESTATE_RETUNE) { |
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tmp = *c; |
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if (fe->ops.set_frontend) |
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retval = fe->ops.set_frontend(fe); |
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*c = tmp; |
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if (retval < 0) |
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fepriv->state = FESTATE_ERROR; |
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else |
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fepriv->state = FESTATE_TUNED; |
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} |
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fepriv->delay = 3 * HZ; |
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fepriv->quality = 0; |
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return; |
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} |
|
|
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/* get the frontend status */ |
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if (fepriv->state & FESTATE_RETUNE) { |
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s = 0; |
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} else { |
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if (fe->ops.read_status) |
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fe->ops.read_status(fe, &s); |
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if (s != fepriv->status) { |
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dvb_frontend_add_event(fe, s); |
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fepriv->status = s; |
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} |
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} |
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|
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/* if we're not tuned, and we have a lock, move to the TUNED state */ |
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if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { |
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dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
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fepriv->state = FESTATE_TUNED; |
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|
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/* if we're tuned, then we have determined the correct inversion */ |
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if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && |
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(c->inversion == INVERSION_AUTO)) { |
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c->inversion = fepriv->inversion; |
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} |
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return; |
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} |
|
|
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/* if we are tuned already, check we're still locked */ |
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if (fepriv->state & FESTATE_TUNED) { |
|
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; |
|
} |
|
break; |
|
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);
|
|
|