| /* |
| * dvb_frontend.c: DVB frontend tuning interface/thread |
| * |
| * |
| * Copyright (C) 1999-2001 Ralph Metzler |
| * Marcus Metzler |
| * Holger Waechtler |
| * for convergence integrated media GmbH |
| * |
| * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup) |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * To obtain the license, point your browser to |
| * http://www.gnu.org/copyleft/gpl.html |
| */ |
| |
| /* Enables DVBv3 compatibility bits at the headers */ |
| #define __DVB_CORE__ |
| |
| #define pr_fmt(fmt) "dvb_frontend: " fmt |
| |
| #include <linux/string.h> |
| #include <linux/kernel.h> |
| #include <linux/sched/signal.h> |
| #include <linux/wait.h> |
| #include <linux/slab.h> |
| #include <linux/poll.h> |
| #include <linux/semaphore.h> |
| #include <linux/module.h> |
| #include <linux/list.h> |
| #include <linux/freezer.h> |
| #include <linux/jiffies.h> |
| #include <linux/kthread.h> |
| #include <linux/ktime.h> |
| #include <asm/processor.h> |
| |
| #include "dvb_frontend.h" |
| #include "dvbdev.h" |
| #include <linux/dvb/version.h> |
| |
| static int dvb_frontend_debug; |
| static int dvb_shutdown_timeout; |
| static int dvb_force_auto_inversion; |
| static int dvb_override_tune_delay; |
| static int dvb_powerdown_on_sleep = 1; |
| static int dvb_mfe_wait_time = 5; |
| |
| module_param_named(frontend_debug, dvb_frontend_debug, int, 0644); |
| MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off)."); |
| module_param(dvb_shutdown_timeout, int, 0644); |
| MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware"); |
| module_param(dvb_force_auto_inversion, int, 0644); |
| MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always"); |
| module_param(dvb_override_tune_delay, int, 0644); |
| MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt"); |
| module_param(dvb_powerdown_on_sleep, int, 0644); |
| MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB voltage off on sleep (default)"); |
| module_param(dvb_mfe_wait_time, int, 0644); |
| MODULE_PARM_DESC(dvb_mfe_wait_time, "Wait up to <mfe_wait_time> seconds on open() for multi-frontend to become available (default:5 seconds)"); |
| |
| #define dprintk(fmt, arg...) \ |
| printk(KERN_DEBUG pr_fmt("%s: " fmt), __func__, ##arg) |
| |
| #define FESTATE_IDLE 1 |
| #define FESTATE_RETUNE 2 |
| #define FESTATE_TUNING_FAST 4 |
| #define FESTATE_TUNING_SLOW 8 |
| #define FESTATE_TUNED 16 |
| #define FESTATE_ZIGZAG_FAST 32 |
| #define FESTATE_ZIGZAG_SLOW 64 |
| #define FESTATE_DISEQC 128 |
| #define FESTATE_ERROR 256 |
| #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC) |
| #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST) |
| #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW) |
| #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW) |
| |
| /* |
| * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. |
| * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. |
| * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. |
| * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. |
| * FESTATE_TUNED. The frontend has successfully locked on. |
| * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. |
| * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. |
| * FESTATE_DISEQC. A DISEQC command has just been issued. |
| * FESTATE_WAITFORLOCK. When we're waiting for a lock. |
| * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. |
| * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. |
| * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. |
| */ |
| |
| static DEFINE_MUTEX(frontend_mutex); |
| |
| struct dvb_frontend_private { |
| /* thread/frontend values */ |
| struct dvb_device *dvbdev; |
| struct dvb_frontend_parameters parameters_out; |
| struct dvb_fe_events events; |
| struct semaphore sem; |
| struct list_head list_head; |
| wait_queue_head_t wait_queue; |
| struct task_struct *thread; |
| unsigned long release_jiffies; |
| unsigned int wakeup; |
| enum fe_status status; |
| unsigned long tune_mode_flags; |
| unsigned int delay; |
| unsigned int reinitialise; |
| int tone; |
| int voltage; |
| |
| /* swzigzag values */ |
| unsigned int state; |
| unsigned int bending; |
| int lnb_drift; |
| unsigned int inversion; |
| unsigned int auto_step; |
| unsigned int auto_sub_step; |
| unsigned int started_auto_step; |
| unsigned int min_delay; |
| unsigned int max_drift; |
| unsigned int step_size; |
| int quality; |
| unsigned int check_wrapped; |
| enum dvbfe_search algo_status; |
| |
| #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
| struct media_pipeline pipe; |
| #endif |
| }; |
| |
| static void dvb_frontend_invoke_release(struct dvb_frontend *fe, |
| void (*release)(struct dvb_frontend *fe)); |
| |
| static void dvb_frontend_free(struct kref *ref) |
| { |
| struct dvb_frontend *fe = |
| container_of(ref, struct dvb_frontend, refcount); |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| |
| dvb_free_device(fepriv->dvbdev); |
| |
| dvb_frontend_invoke_release(fe, fe->ops.release); |
| |
| kfree(fepriv); |
| } |
| |
| static void dvb_frontend_put(struct dvb_frontend *fe) |
| { |
| kref_put(&fe->refcount, dvb_frontend_free); |
| } |
| |
| static void dvb_frontend_get(struct dvb_frontend *fe) |
| { |
| kref_get(&fe->refcount); |
| } |
| |
| static void dvb_frontend_wakeup(struct dvb_frontend *fe); |
| static int dtv_get_frontend(struct dvb_frontend *fe, |
| struct dtv_frontend_properties *c, |
| struct dvb_frontend_parameters *p_out); |
| static int |
| dtv_property_legacy_params_sync(struct dvb_frontend *fe, |
| const struct dtv_frontend_properties *c, |
| struct dvb_frontend_parameters *p); |
| |
| static bool has_get_frontend(struct dvb_frontend *fe) |
| { |
| return fe->ops.get_frontend != NULL; |
| } |
| |
| /* |
| * Due to DVBv3 API calls, a delivery system should be mapped into one of |
| * the 4 DVBv3 delivery systems (FE_QPSK, FE_QAM, FE_OFDM or FE_ATSC), |
| * otherwise, a DVBv3 call will fail. |
| */ |
| enum dvbv3_emulation_type { |
| DVBV3_UNKNOWN, |
| DVBV3_QPSK, |
| DVBV3_QAM, |
| DVBV3_OFDM, |
| DVBV3_ATSC, |
| }; |
| |
| static enum dvbv3_emulation_type dvbv3_type(u32 delivery_system) |
| { |
| switch (delivery_system) { |
| case SYS_DVBC_ANNEX_A: |
| case SYS_DVBC_ANNEX_C: |
| return DVBV3_QAM; |
| case SYS_DVBS: |
| case SYS_DVBS2: |
| case SYS_TURBO: |
| case SYS_ISDBS: |
| case SYS_DSS: |
| return DVBV3_QPSK; |
| case SYS_DVBT: |
| case SYS_DVBT2: |
| case SYS_ISDBT: |
| case SYS_DTMB: |
| return DVBV3_OFDM; |
| case SYS_ATSC: |
| case SYS_ATSCMH: |
| case SYS_DVBC_ANNEX_B: |
| return DVBV3_ATSC; |
| case SYS_UNDEFINED: |
| case SYS_ISDBC: |
| case SYS_DVBH: |
| case SYS_DAB: |
| default: |
| /* |
| * Doesn't know how to emulate those types and/or |
| * there's no frontend driver from this type yet |
| * with some emulation code, so, we're not sure yet how |
| * to handle them, or they're not compatible with a DVBv3 call. |
| */ |
| return DVBV3_UNKNOWN; |
| } |
| } |
| |
| static void dvb_frontend_add_event(struct dvb_frontend *fe, |
| enum fe_status status) |
| { |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| struct dvb_fe_events *events = &fepriv->events; |
| struct dvb_frontend_event *e; |
| int wp; |
| |
| dev_dbg(fe->dvb->device, "%s:\n", __func__); |
| |
| if ((status & FE_HAS_LOCK) && has_get_frontend(fe)) |
| dtv_get_frontend(fe, c, &fepriv->parameters_out); |
| |
| mutex_lock(&events->mtx); |
| |
| wp = (events->eventw + 1) % MAX_EVENT; |
| if (wp == events->eventr) { |
| events->overflow = 1; |
| events->eventr = (events->eventr + 1) % MAX_EVENT; |
| } |
| |
| e = &events->events[events->eventw]; |
| e->status = status; |
| e->parameters = fepriv->parameters_out; |
| |
| events->eventw = wp; |
| |
| mutex_unlock(&events->mtx); |
| |
| wake_up_interruptible (&events->wait_queue); |
| } |
| |
| static int dvb_frontend_get_event(struct dvb_frontend *fe, |
| struct dvb_frontend_event *event, int flags) |
| { |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| struct dvb_fe_events *events = &fepriv->events; |
| |
| dev_dbg(fe->dvb->device, "%s:\n", __func__); |
| |
| if (events->overflow) { |
| events->overflow = 0; |
| return -EOVERFLOW; |
| } |
| |
| if (events->eventw == events->eventr) { |
| int ret; |
| |
| if (flags & O_NONBLOCK) |
| return -EWOULDBLOCK; |
| |
| up(&fepriv->sem); |
| |
| ret = wait_event_interruptible (events->wait_queue, |
| events->eventw != events->eventr); |
| |
| if (down_interruptible (&fepriv->sem)) |
| return -ERESTARTSYS; |
| |
| if (ret < 0) |
| return ret; |
| } |
| |
| mutex_lock(&events->mtx); |
| *event = events->events[events->eventr]; |
| events->eventr = (events->eventr + 1) % MAX_EVENT; |
| mutex_unlock(&events->mtx); |
| |
| return 0; |
| } |
| |
| static void dvb_frontend_clear_events(struct dvb_frontend *fe) |
| { |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| struct dvb_fe_events *events = &fepriv->events; |
| |
| mutex_lock(&events->mtx); |
| events->eventr = events->eventw; |
| mutex_unlock(&events->mtx); |
| } |
| |
| static void dvb_frontend_init(struct dvb_frontend *fe) |
| { |
| dev_dbg(fe->dvb->device, |
| "%s: initialising adapter %i frontend %i (%s)...\n", |
| __func__, fe->dvb->num, fe->id, fe->ops.info.name); |
| |
| if (fe->ops.init) |
| fe->ops.init(fe); |
| if (fe->ops.tuner_ops.init) { |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 1); |
| fe->ops.tuner_ops.init(fe); |
| if (fe->ops.i2c_gate_ctrl) |
| fe->ops.i2c_gate_ctrl(fe, 0); |
| } |
| } |
| |
| void dvb_frontend_reinitialise(struct dvb_frontend *fe) |
| { |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| |
| fepriv->reinitialise = 1; |
| dvb_frontend_wakeup(fe); |
| } |
| EXPORT_SYMBOL(dvb_frontend_reinitialise); |
| |
| static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) |
| { |
| int q2; |
| struct dvb_frontend *fe = fepriv->dvbdev->priv; |
| |
| dev_dbg(fe->dvb->device, "%s:\n", __func__); |
| |
| if (locked) |
| (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256; |
| else |
| (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; |
| |
| q2 = fepriv->quality - 128; |
| q2 *= q2; |
| |
| fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128); |
| } |
| |
| /** |
| * Performs automatic twiddling of frontend parameters. |
| * |
| * @param fe The frontend concerned. |
| * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT |
| * @returns Number of complete iterations that have been performed. |
| */ |
| static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) |
| { |
| int autoinversion; |
| int ready = 0; |
| int fe_set_err = 0; |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; |
| int original_inversion = c->inversion; |
| u32 original_frequency = c->frequency; |
| |
| /* are we using autoinversion? */ |
| autoinversion = ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && |
| (c->inversion == INVERSION_AUTO)); |
| |
| /* setup parameters correctly */ |
| while(!ready) { |
| /* calculate the lnb_drift */ |
| fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; |
| |
| /* wrap the auto_step if we've exceeded the maximum drift */ |
| if (fepriv->lnb_drift > fepriv->max_drift) { |
| fepriv->auto_step = 0; |
| fepriv->auto_sub_step = 0; |
| fepriv->lnb_drift = 0; |
| } |
| |
| /* perform inversion and +/- zigzag */ |
| switch(fepriv->auto_sub_step) { |
| case 0: |
| /* try with the current inversion and current drift setting */ |
| ready = 1; |
| break; |
| |
| case 1: |
| if (!autoinversion) break; |
| |
| fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; |
| ready = 1; |
| break; |
| |
| case 2: |
| if (fepriv->lnb_drift == 0) break; |
| |
| fepriv->lnb_drift = -fepriv->lnb_drift; |
| ready = 1; |
| break; |
| |
| case 3: |
| if (fepriv->lnb_drift == 0) break; |
| if (!autoinversion) break; |
| |
| fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; |
| fepriv->lnb_drift = -fepriv->lnb_drift; |
| ready = 1; |
| break; |
| |
| default: |
| fepriv->auto_step++; |
| fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ |
| break; |
| } |
| |
| if (!ready) fepriv->auto_sub_step++; |
| } |
| |
| /* if this attempt would hit where we started, indicate a complete |
| * iteration has occurred */ |
| if ((fepriv->auto_step == fepriv->started_auto_step) && |
| (fepriv->auto_sub_step == 0) && check_wrapped) { |
| return 1; |
| } |
| |
| dev_dbg(fe->dvb->device, "%s: drift:%i inversion:%i auto_step:%i " \ |
| "auto_sub_step:%i started_auto_step:%i\n", |
| __func__, fepriv->lnb_drift, fepriv->inversion, |
| fepriv->auto_step, fepriv->auto_sub_step, |
| fepriv->started_auto_step); |
| |
| /* set the frontend itself */ |
| c->frequency += fepriv->lnb_drift; |
| if (autoinversion) |
| c->inversion = fepriv->inversion; |
| tmp = *c; |
| if (fe->ops.set_frontend) |
| fe_set_err = fe->ops.set_frontend(fe); |
| *c = tmp; |
| if (fe_set_err < 0) { |
| fepriv->state = FESTATE_ERROR; |
| return fe_set_err; |
| } |
| |
| c->frequency = original_frequency; |
| c->inversion = original_inversion; |
| |
| fepriv->auto_sub_step++; |
| return 0; |
| } |
| |
| static void dvb_frontend_swzigzag(struct dvb_frontend *fe) |
| { |
| enum fe_status s = 0; |
| int retval = 0; |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache, tmp; |
| |
| /* if we've got no parameters, just keep idling */ |
| if (fepriv->state & FESTATE_IDLE) { |
| fepriv->delay = 3*HZ; |
| fepriv->quality = 0; |
| return; |
| } |
| |
| /* in SCAN mode, we just set the frontend when asked and leave it alone */ |
| if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { |
| if (fepriv->state & FESTATE_RETUNE) { |
| tmp = *c; |
| if (fe->ops.set_frontend) |
| retval = fe->ops.set_frontend(fe); |
| *c = tmp; |
| if (retval < 0) |
| fepriv->state = FESTATE_ERROR; |
| else |
| fepriv->state = FESTATE_TUNED; |
| } |
| fepriv->delay = 3*HZ; |
| fepriv->quality = 0; |
| return; |
| } |
| |
| /* get the frontend status */ |
| if (fepriv->state & FESTATE_RETUNE) { |
| s = 0; |
| } else { |
| if (fe->ops.read_status) |
| fe->ops.read_status(fe, &s); |
| if (s != fepriv->status) { |
| dvb_frontend_add_event(fe, s); |
| fepriv->status = s; |
| } |
| } |
| |
| /* if we're not tuned, and we have a lock, move to the TUNED state */ |
| if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { |
| dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
| fepriv->state = FESTATE_TUNED; |
| |
| /* if we're tuned, then we have determined the correct inversion */ |
| if ((!(fe->ops.info.caps & FE_CAN_INVERSION_AUTO)) && |
| (c->inversion == INVERSION_AUTO)) { |
| c->inversion = fepriv->inversion; |
| } |
| return; |
| } |
| |
| /* if we are tuned already, check we're still locked */ |
| if (fepriv->state & FESTATE_TUNED) { |
| dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
| |
| /* we're tuned, and the lock is still good... */ |
| if (s & FE_HAS_LOCK) { |
| return; |
| } else { /* if we _WERE_ tuned, but now don't have a lock */ |
| fepriv->state = FESTATE_ZIGZAG_FAST; |
| fepriv->started_auto_step = fepriv->auto_step; |
| fepriv->check_wrapped = 0; |
| } |
| } |
| |
| /* don't actually do anything if we're in the LOSTLOCK state, |
| * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ |
| if ((fepriv->state & FESTATE_LOSTLOCK) && |
| (fe->ops.info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { |
| dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
| return; |
| } |
| |
| /* don't do anything if we're in the DISEQC state, since this |
| * might be someone with a motorized dish controlled by DISEQC. |
| * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ |
| if (fepriv->state & FESTATE_DISEQC) { |
| dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
| return; |
| } |
| |
| /* if we're in the RETUNE state, set everything up for a brand |
| * new scan, keeping the current inversion setting, as the next |
| * tune is _very_ likely to require the same */ |
| if (fepriv->state & FESTATE_RETUNE) { |
| fepriv->lnb_drift = 0; |
| fepriv->auto_step = 0; |
| fepriv->auto_sub_step = 0; |
| fepriv->started_auto_step = 0; |
| fepriv->check_wrapped = 0; |
| } |
| |
| /* fast zigzag. */ |
| if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { |
| fepriv->delay = fepriv->min_delay; |
| |
| /* perform a tune */ |
| retval = dvb_frontend_swzigzag_autotune(fe, |
| fepriv->check_wrapped); |
| if (retval < 0) { |
| return; |
| } else if (retval) { |
| /* OK, if we've run out of trials at the fast speed. |
| * Drop back to slow for the _next_ attempt */ |
| fepriv->state = FESTATE_SEARCHING_SLOW; |
| fepriv->started_auto_step = fepriv->auto_step; |
| return; |
| } |
| fepriv->check_wrapped = 1; |
| |
| /* if we've just retuned, enter the ZIGZAG_FAST state. |
| * This ensures we cannot return from an |
| * FE_SET_FRONTEND ioctl before the first frontend tune |
| * occurs */ |
| if (fepriv->state & FESTATE_RETUNE) { |
| fepriv->state = FESTATE_TUNING_FAST; |
| } |
| } |
| |
| /* slow zigzag */ |
| if (fepriv->state & FESTATE_SEARCHING_SLOW) { |
| dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
| |
| /* Note: don't bother checking for wrapping; we stay in this |
| * state until we get a lock */ |
| dvb_frontend_swzigzag_autotune(fe, 0); |
| } |
| } |
| |
| static int dvb_frontend_is_exiting(struct dvb_frontend *fe) |
| { |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| |
| if (fe->exit != DVB_FE_NO_EXIT) |
| return 1; |
| |
| if (fepriv->dvbdev->writers == 1) |
| if (time_after_eq(jiffies, fepriv->release_jiffies + |
| dvb_shutdown_timeout * HZ)) |
| return 1; |
| |
| return 0; |
| } |
| |
| static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) |
| { |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| |
| if (fepriv->wakeup) { |
| fepriv->wakeup = 0; |
| return 1; |
| } |
| return dvb_frontend_is_exiting(fe); |
| } |
| |
| static void dvb_frontend_wakeup(struct dvb_frontend *fe) |
| { |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| |
| fepriv->wakeup = 1; |
| wake_up_interruptible(&fepriv->wait_queue); |
| } |
| |
| static int dvb_frontend_thread(void *data) |
| { |
| struct dvb_frontend *fe = data; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| enum fe_status s; |
| enum dvbfe_algo algo; |
| bool re_tune = false; |
| bool semheld = false; |
| |
| dev_dbg(fe->dvb->device, "%s:\n", __func__); |
| |
| fepriv->check_wrapped = 0; |
| fepriv->quality = 0; |
| fepriv->delay = 3*HZ; |
| fepriv->status = 0; |
| fepriv->wakeup = 0; |
| fepriv->reinitialise = 0; |
| |
| dvb_frontend_init(fe); |
| |
| set_freezable(); |
| while (1) { |
| up(&fepriv->sem); /* is locked when we enter the thread... */ |
| restart: |
| wait_event_interruptible_timeout(fepriv->wait_queue, |
| dvb_frontend_should_wakeup(fe) || kthread_should_stop() |
| || freezing(current), |
| fepriv->delay); |
| |
| if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) { |
| /* got signal or quitting */ |
| if (!down_interruptible(&fepriv->sem)) |
| semheld = true; |
| fe->exit = DVB_FE_NORMAL_EXIT; |
| break; |
| } |
| |
| if (try_to_freeze()) |
| goto restart; |
| |
| if (down_interruptible(&fepriv->sem)) |
| break; |
| |
| if (fepriv->reinitialise) { |
| dvb_frontend_init(fe); |
| if (fe->ops.set_tone && fepriv->tone != -1) |
| fe->ops.set_tone(fe, fepriv->tone); |
| if (fe->ops.set_voltage && fepriv->voltage != -1) |
| fe->ops.set_voltage(fe, fepriv->voltage); |
| fepriv->reinitialise = 0; |
| } |
| |
| /* do an iteration of the tuning loop */ |
| if (fe->ops.get_frontend_algo) { |
| algo = fe->ops.get_frontend_algo(fe); |
| switch (algo) { |
| case DVBFE_ALGO_HW: |
| dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_HW\n", __func__); |
| |
| if (fepriv->state & FESTATE_RETUNE) { |
| dev_dbg(fe->dvb->device, "%s: Retune requested, FESTATE_RETUNE\n", __func__); |
| re_tune = true; |
| fepriv->state = FESTATE_TUNED; |
| } else { |
| re_tune = false; |
| } |
| |
| if (fe->ops.tune) |
| fe->ops.tune(fe, re_tune, fepriv->tune_mode_flags, &fepriv->delay, &s); |
| |
| if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) { |
| dev_dbg(fe->dvb->device, "%s: state changed, adding current state\n", __func__); |
| dvb_frontend_add_event(fe, s); |
| fepriv->status = s; |
| } |
| break; |
| case DVBFE_ALGO_SW: |
| dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_SW\n", __func__); |
| dvb_frontend_swzigzag(fe); |
| break; |
| case DVBFE_ALGO_CUSTOM: |
| dev_dbg(fe->dvb->device, "%s: Frontend ALGO = DVBFE_ALGO_CUSTOM, state=%d\n", __func__, fepriv->state); |
| if (fepriv->state & FESTATE_RETUNE) { |
| dev_dbg(fe->dvb->device, "%s: Retune requested, FESTAT_RETUNE\n", __func__); |
| fepriv->state = FESTATE_TUNED; |
| } |
| /* Case where we are going to search for a carrier |
| * User asked us to retune again for some reason, possibly |
| * requesting a search with a new set of parameters |
| */ |
| if (fepriv->algo_status & DVBFE_ALGO_SEARCH_AGAIN) { |
| if (fe->ops.search) { |
| fepriv->algo_status = fe->ops.search(fe); |
| /* We did do a search as was requested, the flags are |
| * now unset as well and has the flags wrt to search. |
| */ |
| } else { |
| fepriv->algo_status &= ~DVBFE_ALGO_SEARCH_AGAIN; |
| } |
| } |
| /* Track the carrier if the search was successful */ |
| if (fepriv->algo_status != DVBFE_ALGO_SEARCH_SUCCESS) { |
| fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; |
| fepriv->delay = HZ / 2; |
| } |
| dtv_property_legacy_params_sync(fe, 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) |
| { |
| *freq_min = max(fe->ops.info.frequency_min, fe->ops.tuner_ops.info.frequency_min); |
| |
| if (fe->ops.info.frequency_max == 0) |
| *freq_max = fe->ops.tuner_ops.info.frequency_max; |
| else if (fe->ops.tuner_ops.info.frequency_max == 0) |
| *freq_max = fe->ops.info.frequency_max; |
| else |
| *freq_max = min(fe->ops.info.frequency_max, fe->ops.tuner_ops.info.frequency_max); |
| |
| if (*freq_min == 0 || *freq_max == 0) |
| dev_warn(fe->dvb->device, "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n", |
| fe->dvb->num, fe->id); |
| } |
| |
| static int dvb_frontend_check_parameters(struct dvb_frontend *fe) |
| { |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| u32 freq_min; |
| u32 freq_max; |
| |
| /* range check: frequency */ |
| dvb_frontend_get_frequency_limits(fe, &freq_min, &freq_max); |
| if ((freq_min && c->frequency < freq_min) || |
| (freq_max && c->frequency > freq_max)) { |
| dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i frequency %u out of range (%u..%u)\n", |
| fe->dvb->num, fe->id, c->frequency, |
| freq_min, freq_max); |
| return -EINVAL; |
| } |
| |
| /* range check: symbol rate */ |
| switch (c->delivery_system) { |
| case SYS_DVBS: |
| case SYS_DVBS2: |
| case SYS_TURBO: |
| case SYS_DVBC_ANNEX_A: |
| case SYS_DVBC_ANNEX_C: |
| if ((fe->ops.info.symbol_rate_min && |
| c->symbol_rate < fe->ops.info.symbol_rate_min) || |
| (fe->ops.info.symbol_rate_max && |
| c->symbol_rate > fe->ops.info.symbol_rate_max)) { |
| dev_warn(fe->dvb->device, "DVB: adapter %i frontend %i symbol rate %u out of range (%u..%u)\n", |
| fe->dvb->num, fe->id, c->symbol_rate, |
| fe->ops.info.symbol_rate_min, |
| fe->ops.info.symbol_rate_max); |
| return -EINVAL; |
| } |
| default: |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static int dvb_frontend_clear_cache(struct dvb_frontend *fe) |
| { |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| int i; |
| u32 delsys; |
| |
| delsys = c->delivery_system; |
| memset(c, 0, offsetof(struct dtv_frontend_properties, strength)); |
| c->delivery_system = delsys; |
| |
| c->state = DTV_CLEAR; |
| |
| dev_dbg(fe->dvb->device, "%s: Clearing cache for delivery system %d\n", |
| __func__, c->delivery_system); |
| |
| c->transmission_mode = TRANSMISSION_MODE_AUTO; |
| c->bandwidth_hz = 0; /* AUTO */ |
| c->guard_interval = GUARD_INTERVAL_AUTO; |
| c->hierarchy = HIERARCHY_AUTO; |
| c->symbol_rate = 0; |
| c->code_rate_HP = FEC_AUTO; |
| c->code_rate_LP = FEC_AUTO; |
| c->fec_inner = FEC_AUTO; |
| c->rolloff = ROLLOFF_AUTO; |
| c->voltage = SEC_VOLTAGE_OFF; |
| c->sectone = SEC_TONE_OFF; |
| c->pilot = PILOT_AUTO; |
| |
| c->isdbt_partial_reception = 0; |
| c->isdbt_sb_mode = 0; |
| c->isdbt_sb_subchannel = 0; |
| c->isdbt_sb_segment_idx = 0; |
| c->isdbt_sb_segment_count = 0; |
| c->isdbt_layer_enabled = 0; |
| for (i = 0; i < 3; i++) { |
| c->layer[i].fec = FEC_AUTO; |
| c->layer[i].modulation = QAM_AUTO; |
| c->layer[i].interleaving = 0; |
| c->layer[i].segment_count = 0; |
| } |
| |
| c->stream_id = NO_STREAM_ID_FILTER; |
| |
| switch (c->delivery_system) { |
| case SYS_DVBS: |
| case SYS_DVBS2: |
| case SYS_TURBO: |
| c->modulation = QPSK; /* implied for DVB-S in legacy API */ |
| c->rolloff = ROLLOFF_35;/* implied for DVB-S */ |
| break; |
| case SYS_ATSC: |
| c->modulation = VSB_8; |
| break; |
| 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 \ |
| } |
| |
| static struct dtv_cmds_h dtv_cmds[DTV_MAX_COMMAND + 1] = { |
| _DTV_CMD(DTV_TUNE, 1, 0), |
| _DTV_CMD(DTV_CLEAR, 1, 0), |
| |
| /* Set */ |
| _DTV_CMD(DTV_FREQUENCY, 1, 0), |
| _DTV_CMD(DTV_BANDWIDTH_HZ, 1, 0), |
| _DTV_CMD(DTV_MODULATION, 1, 0), |
| _DTV_CMD(DTV_INVERSION, 1, 0), |
| _DTV_CMD(DTV_DISEQC_MASTER, 1, 1), |
| _DTV_CMD(DTV_SYMBOL_RATE, 1, 0), |
| _DTV_CMD(DTV_INNER_FEC, 1, 0), |
| _DTV_CMD(DTV_VOLTAGE, 1, 0), |
| _DTV_CMD(DTV_TONE, 1, 0), |
| _DTV_CMD(DTV_PILOT, 1, 0), |
| _DTV_CMD(DTV_ROLLOFF, 1, 0), |
| _DTV_CMD(DTV_DELIVERY_SYSTEM, 1, 0), |
| _DTV_CMD(DTV_HIERARCHY, 1, 0), |
| _DTV_CMD(DTV_CODE_RATE_HP, 1, 0), |
| _DTV_CMD(DTV_CODE_RATE_LP, 1, 0), |
| _DTV_CMD(DTV_GUARD_INTERVAL, 1, 0), |
| _DTV_CMD(DTV_TRANSMISSION_MODE, 1, 0), |
| _DTV_CMD(DTV_INTERLEAVING, 1, 0), |
| |
| _DTV_CMD(DTV_ISDBT_PARTIAL_RECEPTION, 1, 0), |
| _DTV_CMD(DTV_ISDBT_SOUND_BROADCASTING, 1, 0), |
| _DTV_CMD(DTV_ISDBT_SB_SUBCHANNEL_ID, 1, 0), |
| _DTV_CMD(DTV_ISDBT_SB_SEGMENT_IDX, 1, 0), |
| _DTV_CMD(DTV_ISDBT_SB_SEGMENT_COUNT, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYER_ENABLED, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERA_FEC, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERA_MODULATION, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERA_SEGMENT_COUNT, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERA_TIME_INTERLEAVING, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERB_FEC, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERB_MODULATION, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERB_SEGMENT_COUNT, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERB_TIME_INTERLEAVING, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERC_FEC, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERC_MODULATION, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERC_SEGMENT_COUNT, 1, 0), |
| _DTV_CMD(DTV_ISDBT_LAYERC_TIME_INTERLEAVING, 1, 0), |
| |
| _DTV_CMD(DTV_STREAM_ID, 1, 0), |
| _DTV_CMD(DTV_DVBT2_PLP_ID_LEGACY, 1, 0), |
| _DTV_CMD(DTV_LNA, 1, 0), |
| |
| /* Get */ |
| _DTV_CMD(DTV_DISEQC_SLAVE_REPLY, 0, 1), |
| _DTV_CMD(DTV_API_VERSION, 0, 0), |
| |
| _DTV_CMD(DTV_ENUM_DELSYS, 0, 0), |
| |
| _DTV_CMD(DTV_ATSCMH_PARADE_ID, 1, 0), |
| _DTV_CMD(DTV_ATSCMH_RS_FRAME_ENSEMBLE, 1, 0), |
| |
| _DTV_CMD(DTV_ATSCMH_FIC_VER, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_NOG, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_TNOG, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_SGN, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_PRC, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_RS_FRAME_MODE, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_PRI, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_RS_CODE_MODE_SEC, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_SCCC_BLOCK_MODE, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_A, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_B, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_C, 0, 0), |
| _DTV_CMD(DTV_ATSCMH_SCCC_CODE_MODE_D, 0, 0), |
| |
| /* Statistics API */ |
| _DTV_CMD(DTV_STAT_SIGNAL_STRENGTH, 0, 0), |
| _DTV_CMD(DTV_STAT_CNR, 0, 0), |
| _DTV_CMD(DTV_STAT_PRE_ERROR_BIT_COUNT, 0, 0), |
| _DTV_CMD(DTV_STAT_PRE_TOTAL_BIT_COUNT, 0, 0), |
| _DTV_CMD(DTV_STAT_POST_ERROR_BIT_COUNT, 0, 0), |
| _DTV_CMD(DTV_STAT_POST_TOTAL_BIT_COUNT, 0, 0), |
| _DTV_CMD(DTV_STAT_ERROR_BLOCK_COUNT, 0, 0), |
| _DTV_CMD(DTV_STAT_TOTAL_BLOCK_COUNT, 0, 0), |
| }; |
| |
| static void dtv_property_dump(struct dvb_frontend *fe, |
| bool is_set, |
| struct dtv_property *tvp) |
| { |
| int i; |
| |
| if (tvp->cmd <= 0 || tvp->cmd > DTV_MAX_COMMAND) { |
| dev_warn(fe->dvb->device, "%s: %s tvp.cmd = 0x%08x undefined\n", |
| __func__, |
| is_set ? "SET" : "GET", |
| tvp->cmd); |
| return; |
| } |
| |
| dev_dbg(fe->dvb->device, "%s: %s tvp.cmd = 0x%08x (%s)\n", __func__, |
| is_set ? "SET" : "GET", |
| tvp->cmd, |
| dtv_cmds[tvp->cmd].name); |
| |
| if (dtv_cmds[tvp->cmd].buffer) { |
| dev_dbg(fe->dvb->device, "%s: tvp.u.buffer.len = 0x%02x\n", |
| __func__, tvp->u.buffer.len); |
| |
| for(i = 0; i < tvp->u.buffer.len; i++) |
| dev_dbg(fe->dvb->device, |
| "%s: tvp.u.buffer.data[0x%02x] = 0x%02x\n", |
| __func__, i, tvp->u.buffer.data[i]); |
| } else { |
| dev_dbg(fe->dvb->device, "%s: tvp.u.data = 0x%08x\n", __func__, |
| tvp->u.data); |
| } |
| } |
| |
| /* Synchronise the legacy tuning parameters into the cache, so that demodulator |
| * drivers can use a single set_frontend tuning function, regardless of whether |
| * it's being used for the legacy or new API, reducing code and complexity. |
| */ |
| static int dtv_property_cache_sync(struct dvb_frontend *fe, |
| struct dtv_frontend_properties *c, |
| const struct dvb_frontend_parameters *p) |
| { |
| c->frequency = p->frequency; |
| c->inversion = p->inversion; |
| |
| switch (dvbv3_type(c->delivery_system)) { |
| case DVBV3_QPSK: |
| dev_dbg(fe->dvb->device, "%s: Preparing QPSK req\n", __func__); |
| c->symbol_rate = p->u.qpsk.symbol_rate; |
| c->fec_inner = p->u.qpsk.fec_inner; |
| break; |
| case DVBV3_QAM: |
| dev_dbg(fe->dvb->device, "%s: Preparing QAM req\n", __func__); |
| c->symbol_rate = p->u.qam.symbol_rate; |
| c->fec_inner = p->u.qam.fec_inner; |
| c->modulation = p->u.qam.modulation; |
| break; |
| case DVBV3_OFDM: |
| dev_dbg(fe->dvb->device, "%s: Preparing OFDM req\n", __func__); |
| |
| switch (p->u.ofdm.bandwidth) { |
| case BANDWIDTH_10_MHZ: |
| c->bandwidth_hz = 10000000; |
| break; |
| case BANDWIDTH_8_MHZ: |
| c->bandwidth_hz = 8000000; |
| break; |
| case BANDWIDTH_7_MHZ: |
| c->bandwidth_hz = 7000000; |
| break; |
| case BANDWIDTH_6_MHZ: |
| c->bandwidth_hz = 6000000; |
| break; |
| case BANDWIDTH_5_MHZ: |
| c->bandwidth_hz = 5000000; |
| break; |
| case BANDWIDTH_1_712_MHZ: |
| c->bandwidth_hz = 1712000; |
| break; |
| case BANDWIDTH_AUTO: |
| c->bandwidth_hz = 0; |
| } |
| |
| c->code_rate_HP = p->u.ofdm.code_rate_HP; |
| c->code_rate_LP = p->u.ofdm.code_rate_LP; |
| c->modulation = p->u.ofdm.constellation; |
| c->transmission_mode = p->u.ofdm.transmission_mode; |
| c->guard_interval = p->u.ofdm.guard_interval; |
| c->hierarchy = p->u.ofdm.hierarchy_information; |
| break; |
| case DVBV3_ATSC: |
| dev_dbg(fe->dvb->device, "%s: Preparing ATSC req\n", __func__); |
| c->modulation = p->u.vsb.modulation; |
| if (c->delivery_system == SYS_ATSCMH) |
| break; |
| if ((c->modulation == VSB_8) || (c->modulation == VSB_16)) |
| c->delivery_system = SYS_ATSC; |
| else |
| c->delivery_system = SYS_DVBC_ANNEX_B; |
| break; |
| case DVBV3_UNKNOWN: |
| dev_err(fe->dvb->device, |
| "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", |
| __func__, c->delivery_system); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* Ensure the cached values are set correctly in the frontend |
| * legacy tuning structures, for the advanced tuning API. |
| */ |
| static int |
| dtv_property_legacy_params_sync(struct dvb_frontend *fe, |
| 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_ioctl_legacy(struct file *file, |
| unsigned int cmd, void *parg); |
| static int dvb_frontend_ioctl_properties(struct file *file, |
| unsigned int cmd, void *parg); |
| |
| static int dtv_property_process_get(struct dvb_frontend *fe, |
| const struct dtv_frontend_properties *c, |
| struct dtv_property *tvp, |
| struct file *file) |
| { |
| int r, ncaps; |
| |
| switch(tvp->cmd) { |
| case DTV_ENUM_DELSYS: |
| ncaps = 0; |
| while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { |
| tvp->u.buffer.data[ncaps] = fe->ops.delsys[ncaps]; |
| ncaps++; |
| } |
| tvp->u.buffer.len = ncaps; |
| break; |
| case DTV_FREQUENCY: |
| tvp->u.data = c->frequency; |
| break; |
| case DTV_MODULATION: |
| tvp->u.data = c->modulation; |
| break; |
| case DTV_BANDWIDTH_HZ: |
| tvp->u.data = c->bandwidth_hz; |
| break; |
| case DTV_INVERSION: |
| tvp->u.data = c->inversion; |
| break; |
| case DTV_SYMBOL_RATE: |
| tvp->u.data = c->symbol_rate; |
| break; |
| case DTV_INNER_FEC: |
| tvp->u.data = c->fec_inner; |
| break; |
| case DTV_PILOT: |
| tvp->u.data = c->pilot; |
| break; |
| case DTV_ROLLOFF: |
| tvp->u.data = c->rolloff; |
| break; |
| case DTV_DELIVERY_SYSTEM: |
| tvp->u.data = c->delivery_system; |
| break; |
| case DTV_VOLTAGE: |
| tvp->u.data = c->voltage; |
| break; |
| case DTV_TONE: |
| tvp->u.data = c->sectone; |
| break; |
| case DTV_API_VERSION: |
| tvp->u.data = (DVB_API_VERSION << 8) | DVB_API_VERSION_MINOR; |
| break; |
| case DTV_CODE_RATE_HP: |
| tvp->u.data = c->code_rate_HP; |
| break; |
| case DTV_CODE_RATE_LP: |
| tvp->u.data = c->code_rate_LP; |
| break; |
| case DTV_GUARD_INTERVAL: |
| tvp->u.data = c->guard_interval; |
| break; |
| case DTV_TRANSMISSION_MODE: |
| tvp->u.data = c->transmission_mode; |
| break; |
| case DTV_HIERARCHY: |
| tvp->u.data = c->hierarchy; |
| break; |
| case DTV_INTERLEAVING: |
| tvp->u.data = c->interleaving; |
| break; |
| |
| /* ISDB-T Support here */ |
| case DTV_ISDBT_PARTIAL_RECEPTION: |
| tvp->u.data = c->isdbt_partial_reception; |
| break; |
| case DTV_ISDBT_SOUND_BROADCASTING: |
| tvp->u.data = c->isdbt_sb_mode; |
| break; |
| case DTV_ISDBT_SB_SUBCHANNEL_ID: |
| tvp->u.data = c->isdbt_sb_subchannel; |
| break; |
| case DTV_ISDBT_SB_SEGMENT_IDX: |
| tvp->u.data = c->isdbt_sb_segment_idx; |
| break; |
| case DTV_ISDBT_SB_SEGMENT_COUNT: |
| tvp->u.data = c->isdbt_sb_segment_count; |
| break; |
| case DTV_ISDBT_LAYER_ENABLED: |
| tvp->u.data = c->isdbt_layer_enabled; |
| break; |
| case DTV_ISDBT_LAYERA_FEC: |
| tvp->u.data = c->layer[0].fec; |
| break; |
| case DTV_ISDBT_LAYERA_MODULATION: |
| tvp->u.data = c->layer[0].modulation; |
| break; |
| case DTV_ISDBT_LAYERA_SEGMENT_COUNT: |
| tvp->u.data = c->layer[0].segment_count; |
| break; |
| case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: |
| tvp->u.data = c->layer[0].interleaving; |
| break; |
| case DTV_ISDBT_LAYERB_FEC: |
| tvp->u.data = c->layer[1].fec; |
| break; |
| case DTV_ISDBT_LAYERB_MODULATION: |
| tvp->u.data = c->layer[1].modulation; |
| break; |
| case DTV_ISDBT_LAYERB_SEGMENT_COUNT: |
| tvp->u.data = c->layer[1].segment_count; |
| break; |
| case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: |
| tvp->u.data = c->layer[1].interleaving; |
| break; |
| case DTV_ISDBT_LAYERC_FEC: |
| tvp->u.data = c->layer[2].fec; |
| break; |
| case DTV_ISDBT_LAYERC_MODULATION: |
| tvp->u.data = c->layer[2].modulation; |
| break; |
| case DTV_ISDBT_LAYERC_SEGMENT_COUNT: |
| tvp->u.data = c->layer[2].segment_count; |
| break; |
| case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: |
| tvp->u.data = c->layer[2].interleaving; |
| break; |
| |
| /* Multistream support */ |
| case DTV_STREAM_ID: |
| case DTV_DVBT2_PLP_ID_LEGACY: |
| tvp->u.data = c->stream_id; |
| break; |
| |
| /* ATSC-MH */ |
| case DTV_ATSCMH_FIC_VER: |
| tvp->u.data = fe->dtv_property_cache.atscmh_fic_ver; |
| break; |
| case DTV_ATSCMH_PARADE_ID: |
| tvp->u.data = fe->dtv_property_cache.atscmh_parade_id; |
| break; |
| case DTV_ATSCMH_NOG: |
| tvp->u.data = fe->dtv_property_cache.atscmh_nog; |
| break; |
| case DTV_ATSCMH_TNOG: |
| tvp->u.data = fe->dtv_property_cache.atscmh_tnog; |
| break; |
| case DTV_ATSCMH_SGN: |
| tvp->u.data = fe->dtv_property_cache.atscmh_sgn; |
| break; |
| case DTV_ATSCMH_PRC: |
| tvp->u.data = fe->dtv_property_cache.atscmh_prc; |
| break; |
| case DTV_ATSCMH_RS_FRAME_MODE: |
| tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_mode; |
| break; |
| case DTV_ATSCMH_RS_FRAME_ENSEMBLE: |
| tvp->u.data = fe->dtv_property_cache.atscmh_rs_frame_ensemble; |
| break; |
| case DTV_ATSCMH_RS_CODE_MODE_PRI: |
| tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_pri; |
| break; |
| case DTV_ATSCMH_RS_CODE_MODE_SEC: |
| tvp->u.data = fe->dtv_property_cache.atscmh_rs_code_mode_sec; |
| break; |
| case DTV_ATSCMH_SCCC_BLOCK_MODE: |
| tvp->u.data = fe->dtv_property_cache.atscmh_sccc_block_mode; |
| break; |
| case DTV_ATSCMH_SCCC_CODE_MODE_A: |
| tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_a; |
| break; |
| case DTV_ATSCMH_SCCC_CODE_MODE_B: |
| tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_b; |
| break; |
| case DTV_ATSCMH_SCCC_CODE_MODE_C: |
| tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_c; |
| break; |
| case DTV_ATSCMH_SCCC_CODE_MODE_D: |
| tvp->u.data = fe->dtv_property_cache.atscmh_sccc_code_mode_d; |
| break; |
| |
| case DTV_LNA: |
| tvp->u.data = c->lna; |
| break; |
| |
| /* Fill quality measures */ |
| case DTV_STAT_SIGNAL_STRENGTH: |
| tvp->u.st = c->strength; |
| break; |
| case DTV_STAT_CNR: |
| tvp->u.st = c->cnr; |
| break; |
| case DTV_STAT_PRE_ERROR_BIT_COUNT: |
| tvp->u.st = c->pre_bit_error; |
| break; |
| case DTV_STAT_PRE_TOTAL_BIT_COUNT: |
| tvp->u.st = c->pre_bit_count; |
| break; |
| case DTV_STAT_POST_ERROR_BIT_COUNT: |
| tvp->u.st = c->post_bit_error; |
| break; |
| case DTV_STAT_POST_TOTAL_BIT_COUNT: |
| tvp->u.st = c->post_bit_count; |
| break; |
| case DTV_STAT_ERROR_BLOCK_COUNT: |
| tvp->u.st = c->block_error; |
| break; |
| case DTV_STAT_TOTAL_BLOCK_COUNT: |
| tvp->u.st = c->block_count; |
| break; |
| default: |
| dev_dbg(fe->dvb->device, |
| "%s: FE property %d doesn't exist\n", |
| __func__, tvp->cmd); |
| return -EINVAL; |
| } |
| |
| /* Allow the frontend to override outgoing properties */ |
| if (fe->ops.get_property) { |
| r = fe->ops.get_property(fe, tvp); |
| if (r < 0) |
| return r; |
| } |
| |
| dtv_property_dump(fe, false, tvp); |
| |
| 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 frontent |
| * parameters are compatible with DVB-S spec. |
| */ |
| static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys) |
| { |
| int i; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| |
| c->delivery_system = delsys; |
| |
| /* |
| * If the call is for ISDB-T, put it into full-seg, auto mode, TV |
| */ |
| if (c->delivery_system == SYS_ISDBT) { |
| dev_dbg(fe->dvb->device, |
| "%s: Using defaults for SYS_ISDBT\n", |
| __func__); |
| |
| if (!c->bandwidth_hz) |
| c->bandwidth_hz = 6000000; |
| |
| c->isdbt_partial_reception = 0; |
| c->isdbt_sb_mode = 0; |
| c->isdbt_sb_subchannel = 0; |
| c->isdbt_sb_segment_idx = 0; |
| c->isdbt_sb_segment_count = 0; |
| c->isdbt_layer_enabled = 7; |
| for (i = 0; i < 3; i++) { |
| c->layer[i].fec = FEC_AUTO; |
| c->layer[i].modulation = QAM_AUTO; |
| c->layer[i].interleaving = 0; |
| c->layer[i].segment_count = 0; |
| } |
| } |
| dev_dbg(fe->dvb->device, "%s: change delivery system on cache to %d\n", |
| __func__, c->delivery_system); |
| |
| return 0; |
| } |
| |
| /** |
| * dvbv5_set_delivery_system - Sets the delivery system for a DVBv5 API call |
| * @fe: frontend struct |
| * @desired_system: delivery system requested by the user |
| * |
| * A DVBv5 call know what's the desired system it wants. So, set it. |
| * |
| * There are, however, a few known issues with early DVBv5 applications that |
| * are also handled by this logic: |
| * |
| * 1) Some early apps use SYS_UNDEFINED as the desired delivery system. |
| * This is an API violation, but, as we don't want to break userspace, |
| * convert it to the first supported delivery system. |
| * 2) Some apps might be using a DVBv5 call in a wrong way, passing, for |
| * example, SYS_DVBT instead of SYS_ISDBT. This is because early usage of |
| * ISDB-T provided backward compat with DVB-T. |
| */ |
| static int dvbv5_set_delivery_system(struct dvb_frontend *fe, |
| u32 desired_system) |
| { |
| int ncaps; |
| u32 delsys = SYS_UNDEFINED; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| enum dvbv3_emulation_type type; |
| |
| /* |
| * It was reported that some old DVBv5 applications were |
| * filling delivery_system with SYS_UNDEFINED. If this happens, |
| * assume that the application wants to use the first supported |
| * delivery system. |
| */ |
| if (desired_system == SYS_UNDEFINED) |
| desired_system = fe->ops.delsys[0]; |
| |
| /* |
| * This is a DVBv5 call. So, it likely knows the supported |
| * delivery systems. So, check if the desired delivery system is |
| * supported |
| */ |
| ncaps = 0; |
| while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { |
| if (fe->ops.delsys[ncaps] == desired_system) { |
| c->delivery_system = desired_system; |
| dev_dbg(fe->dvb->device, |
| "%s: Changing delivery system to %d\n", |
| __func__, desired_system); |
| return 0; |
| } |
| ncaps++; |
| } |
| |
| /* |
| * The requested delivery system isn't supported. Maybe userspace |
| * is requesting a DVBv3 compatible delivery system. |
| * |
| * The emulation only works if the desired system is one of the |
| * delivery systems supported by DVBv3 API |
| */ |
| if (!is_dvbv3_delsys(desired_system)) { |
| dev_dbg(fe->dvb->device, |
| "%s: Delivery system %d not supported.\n", |
| __func__, desired_system); |
| return -EINVAL; |
| } |
| |
| type = dvbv3_type(desired_system); |
| |
| /* |
| * Get the last non-DVBv3 delivery system that has the same type |
| * of the desired system |
| */ |
| ncaps = 0; |
| while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { |
| if (dvbv3_type(fe->ops.delsys[ncaps]) == type) |
| delsys = fe->ops.delsys[ncaps]; |
| ncaps++; |
| } |
| |
| /* There's nothing compatible with the desired delivery system */ |
| if (delsys == SYS_UNDEFINED) { |
| dev_dbg(fe->dvb->device, |
| "%s: Delivery system %d not supported on emulation mode.\n", |
| __func__, desired_system); |
| return -EINVAL; |
| } |
| |
| dev_dbg(fe->dvb->device, |
| "%s: Using delivery system %d emulated as if it were %d\n", |
| __func__, delsys, desired_system); |
| |
| return emulate_delivery_system(fe, desired_system); |
| } |
| |
| /** |
| * dvbv3_set_delivery_system - Sets the delivery system for a DVBv3 API call |
| * @fe: frontend struct |
| * |
| * A DVBv3 call doesn't know what's the desired system it wants. It also |
| * doesn't allow to switch between different types. Due to that, userspace |
| * should use DVBv5 instead. |
| * However, in order to avoid breaking userspace API, limited backward |
| * compatibility support is provided. |
| * |
| * There are some delivery systems that are incompatible with DVBv3 calls. |
| * |
| * This routine should work fine for frontends that support just one delivery |
| * system. |
| * |
| * For frontends that support multiple frontends: |
| * 1) It defaults to use the first supported delivery system. There's an |
| * userspace application that allows changing it at runtime; |
| * |
| * 2) If the current delivery system is not compatible with DVBv3, it gets |
| * the first one that it is compatible. |
| * |
| * NOTE: in order for this to work with applications like Kaffeine that |
| * uses a DVBv5 call for DVB-S2 and a DVBv3 call to go back to |
| * DVB-S, drivers that support both DVB-S and DVB-S2 should have the |
| * SYS_DVBS entry before the SYS_DVBS2, otherwise it won't switch back |
| * to DVB-S. |
| */ |
| static int dvbv3_set_delivery_system(struct dvb_frontend *fe) |
| { |
| int ncaps; |
| u32 delsys = SYS_UNDEFINED; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| |
| /* If not set yet, defaults to the first supported delivery system */ |
| if (c->delivery_system == SYS_UNDEFINED) |
| c->delivery_system = fe->ops.delsys[0]; |
| |
| /* |
| * Trivial case: just use the current one, if it already a DVBv3 |
| * delivery system |
| */ |
| if (is_dvbv3_delsys(c->delivery_system)) { |
| dev_dbg(fe->dvb->device, |
| "%s: Using delivery system to %d\n", |
| __func__, c->delivery_system); |
| return 0; |
| } |
| |
| /* |
| * Seek for the first delivery system that it is compatible with a |
| * DVBv3 standard |
| */ |
| ncaps = 0; |
| while (ncaps < MAX_DELSYS && fe->ops.delsys[ncaps]) { |
| if (dvbv3_type(fe->ops.delsys[ncaps]) != DVBV3_UNKNOWN) { |
| delsys = fe->ops.delsys[ncaps]; |
| break; |
| } |
| ncaps++; |
| } |
| if (delsys == SYS_UNDEFINED) { |
| dev_dbg(fe->dvb->device, |
| "%s: Couldn't find a delivery system that works with FE_SET_FRONTEND\n", |
| __func__); |
| return -EINVAL; |
| } |
| return emulate_delivery_system(fe, delsys); |
| } |
| |
| static int dtv_property_process_set(struct dvb_frontend *fe, |
| struct dtv_property *tvp, |
| struct file *file) |
| { |
| int r = 0; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| |
| /* Allow the frontend to validate incoming properties */ |
| if (fe->ops.set_property) { |
| r = fe->ops.set_property(fe, tvp); |
| if (r < 0) |
| return r; |
| } |
| |
| dtv_property_dump(fe, true, tvp); |
| |
| switch(tvp->cmd) { |
| case DTV_CLEAR: |
| /* |
| * Reset a cache of data specific to the frontend here. This does |
| * not effect hardware. |
| */ |
| dvb_frontend_clear_cache(fe); |
| break; |
| case DTV_TUNE: |
| /* interpret the cache of data, build either a traditional frontend |
| * tunerequest so we can pass validation in the FE_SET_FRONTEND |
| * ioctl. |
| */ |
| c->state = tvp->cmd; |
| dev_dbg(fe->dvb->device, "%s: Finalised property cache\n", |
| __func__); |
| |
| r = dtv_set_frontend(fe); |
| break; |
| case DTV_FREQUENCY: |
| c->frequency = tvp->u.data; |
| break; |
| case DTV_MODULATION: |
| c->modulation = tvp->u.data; |
| break; |
| case DTV_BANDWIDTH_HZ: |
| c->bandwidth_hz = tvp->u.data; |
| break; |
| case DTV_INVERSION: |
| c->inversion = tvp->u.data; |
| break; |
| case DTV_SYMBOL_RATE: |
| c->symbol_rate = tvp->u.data; |
| break; |
| case DTV_INNER_FEC: |
| c->fec_inner = tvp->u.data; |
| break; |
| case DTV_PILOT: |
| c->pilot = tvp->u.data; |
| break; |
| case DTV_ROLLOFF: |
| c->rolloff = tvp->u.data; |
| break; |
| case DTV_DELIVERY_SYSTEM: |
| r = dvbv5_set_delivery_system(fe, tvp->u.data); |
| break; |
| case DTV_VOLTAGE: |
| c->voltage = tvp->u.data; |
| r = dvb_frontend_ioctl_legacy(file, FE_SET_VOLTAGE, |
| (void *)c->voltage); |
| break; |
| case DTV_TONE: |
| c->sectone = tvp->u.data; |
| r = dvb_frontend_ioctl_legacy(file, FE_SET_TONE, |
| (void *)c->sectone); |
| break; |
| case DTV_CODE_RATE_HP: |
| c->code_rate_HP = tvp->u.data; |
| break; |
| case DTV_CODE_RATE_LP: |
| c->code_rate_LP = tvp->u.data; |
| break; |
| case DTV_GUARD_INTERVAL: |
| c->guard_interval = tvp->u.data; |
| break; |
| case DTV_TRANSMISSION_MODE: |
| c->transmission_mode = tvp->u.data; |
| break; |
| case DTV_HIERARCHY: |
| c->hierarchy = tvp->u.data; |
| break; |
| case DTV_INTERLEAVING: |
| c->interleaving = tvp->u.data; |
| break; |
| |
| /* ISDB-T Support here */ |
| case DTV_ISDBT_PARTIAL_RECEPTION: |
| c->isdbt_partial_reception = tvp->u.data; |
| break; |
| case DTV_ISDBT_SOUND_BROADCASTING: |
| c->isdbt_sb_mode = tvp->u.data; |
| break; |
| case DTV_ISDBT_SB_SUBCHANNEL_ID: |
| c->isdbt_sb_subchannel = tvp->u.data; |
| break; |
| case DTV_ISDBT_SB_SEGMENT_IDX: |
| c->isdbt_sb_segment_idx = tvp->u.data; |
| break; |
| case DTV_ISDBT_SB_SEGMENT_COUNT: |
| c->isdbt_sb_segment_count = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYER_ENABLED: |
| c->isdbt_layer_enabled = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERA_FEC: |
| c->layer[0].fec = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERA_MODULATION: |
| c->layer[0].modulation = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERA_SEGMENT_COUNT: |
| c->layer[0].segment_count = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERA_TIME_INTERLEAVING: |
| c->layer[0].interleaving = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERB_FEC: |
| c->layer[1].fec = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERB_MODULATION: |
| c->layer[1].modulation = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERB_SEGMENT_COUNT: |
| c->layer[1].segment_count = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERB_TIME_INTERLEAVING: |
| c->layer[1].interleaving = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERC_FEC: |
| c->layer[2].fec = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERC_MODULATION: |
| c->layer[2].modulation = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERC_SEGMENT_COUNT: |
| c->layer[2].segment_count = tvp->u.data; |
| break; |
| case DTV_ISDBT_LAYERC_TIME_INTERLEAVING: |
| c->layer[2].interleaving = tvp->u.data; |
| break; |
| |
| /* Multistream support */ |
| case DTV_STREAM_ID: |
| case DTV_DVBT2_PLP_ID_LEGACY: |
| c->stream_id = tvp->u.data; |
| break; |
| |
| /* ATSC-MH */ |
| case DTV_ATSCMH_PARADE_ID: |
| fe->dtv_property_cache.atscmh_parade_id = tvp->u.data; |
| break; |
| case DTV_ATSCMH_RS_FRAME_ENSEMBLE: |
| fe->dtv_property_cache.atscmh_rs_frame_ensemble = tvp->u.data; |
| break; |
| |
| case DTV_LNA: |
| c->lna = tvp->u.data; |
| if (fe->ops.set_lna) |
| r = fe->ops.set_lna(fe); |
| if (r < 0) |
| c->lna = LNA_AUTO; |
| break; |
| |
| default: |
| return -EINVAL; |
| } |
| |
| return r; |
| } |
| |
| static int dvb_frontend_ioctl(struct file *file, |
| unsigned int cmd, void *parg) |
| { |
| struct dvb_device *dvbdev = file->private_data; |
| struct dvb_frontend *fe = dvbdev->priv; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| int err = -EOPNOTSUPP; |
| |
| dev_dbg(fe->dvb->device, "%s: (%d)\n", __func__, _IOC_NR(cmd)); |
| if (down_interruptible(&fepriv->sem)) |
| return -ERESTARTSYS; |
| |
| if (fe->exit != DVB_FE_NO_EXIT) { |
| up(&fepriv->sem); |
| return -ENODEV; |
| } |
| |
| if ((file->f_flags & O_ACCMODE) == O_RDONLY && |
| (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || |
| cmd == FE_DISEQC_RECV_SLAVE_REPLY)) { |
| up(&fepriv->sem); |
| return -EPERM; |
| } |
| |
| if ((cmd == FE_SET_PROPERTY) || (cmd == FE_GET_PROPERTY)) |
| err = dvb_frontend_ioctl_properties(file, cmd, parg); |
| else { |
| c->state = DTV_UNDEFINED; |
| err = dvb_frontend_ioctl_legacy(file, cmd, parg); |
| } |
| |
| up(&fepriv->sem); |
| return err; |
| } |
| |
| static int dvb_frontend_ioctl_properties(struct file *file, |
| unsigned int cmd, void *parg) |
| { |
| struct dvb_device *dvbdev = file->private_data; |
| struct dvb_frontend *fe = dvbdev->priv; |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| int err = 0; |
| |
| struct dtv_properties *tvps = parg; |
| struct dtv_property *tvp = NULL; |
| int i; |
| |
| dev_dbg(fe->dvb->device, "%s:\n", __func__); |
| |
| if (cmd == FE_SET_PROPERTY) { |
| dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num); |
| dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props); |
| |
| /* Put an arbitrary limit on the number of messages that can |
| * be sent at once */ |
| if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) |
| return -EINVAL; |
| |
| tvp = memdup_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, tvp + i, file); |
| if (err < 0) |
| goto out; |
| (tvp + i)->result = err; |
| } |
| |
| if (c->state == DTV_TUNE) |
| dev_dbg(fe->dvb->device, "%s: Property cache is full, tuning\n", __func__); |
| |
| } else if (cmd == FE_GET_PROPERTY) { |
| struct dtv_frontend_properties getp = fe->dtv_property_cache; |
| |
| dev_dbg(fe->dvb->device, "%s: properties.num = %d\n", __func__, tvps->num); |
| dev_dbg(fe->dvb->device, "%s: properties.props = %p\n", __func__, tvps->props); |
| |
| /* Put an arbitrary limit on the number of messages that can |
| * be sent at once */ |
| if ((tvps->num == 0) || (tvps->num > DTV_IOCTL_MAX_MSGS)) |
| return -EINVAL; |
| |
| tvp = memdup_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; |
| (tvp + i)->result = err; |
| } |
| |
| if (copy_to_user((void __user *)tvps->props, tvp, |
| tvps->num * sizeof(struct dtv_property))) { |
| err = -EFAULT; |
| goto out; |
| } |
| |
| } else |
| err = -EOPNOTSUPP; |
| |
| out: |
| kfree(tvp); |
| return err; |
| } |
| |
| static int dtv_set_frontend(struct dvb_frontend *fe) |
| { |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| struct dvb_frontend_tune_settings fetunesettings; |
| u32 rolloff = 0; |
| |
| if (dvb_frontend_check_parameters(fe) < 0) |
| return -EINVAL; |
| |
| /* |
| * Initialize output parameters to match the values given by |
| * the user. FE_SET_FRONTEND triggers an initial frontend event |
| * with status = 0, which copies output parameters to userspace. |
| */ |
| dtv_property_legacy_params_sync(fe, 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 = fe->ops.info.frequency_stepsize * 2; |
| fepriv->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1; |
| break; |
| default: |
| /* |
| * FIXME: This sounds wrong! if freqency_stepsize is |
| * defined by the frontend, why not use it??? |
| */ |
| fepriv->min_delay = HZ / 20; |
| fepriv->step_size = 0; /* no zigzag */ |
| fepriv->max_drift = 0; |
| break; |
| } |
| } |
| if (dvb_override_tune_delay > 0) |
| fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; |
| |
| fepriv->state = FESTATE_RETUNE; |
| |
| /* Request the search algorithm to search */ |
| fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN; |
| |
| dvb_frontend_clear_events(fe); |
| dvb_frontend_add_event(fe, 0); |
| dvb_frontend_wakeup(fe); |
| fepriv->status = 0; |
| |
| return 0; |
| } |
| |
| |
| static int dvb_frontend_ioctl_legacy(struct file *file, |
| unsigned int cmd, void *parg) |
| { |
| struct dvb_device *dvbdev = file->private_data; |
| struct dvb_frontend *fe = dvbdev->priv; |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| struct dtv_frontend_properties *c = &fe->dtv_property_cache; |
| int err = -EOPNOTSUPP; |
| |
| switch (cmd) { |
| case FE_GET_INFO: { |
| struct dvb_frontend_info* info = parg; |
| |
| memcpy(info, &fe->ops.info, sizeof(struct dvb_frontend_info)); |
| dvb_frontend_get_frequency_limits(fe, &info->frequency_min, &info->frequency_max); |
| |
| /* |
| * Associate the 4 delivery systems supported by DVBv3 |
| * API with their DVBv5 counterpart. For the other standards, |
| * use the closest type, assuming that it would hopefully |
| * work with a DVBv3 application. |
| * It should be noticed that, on multi-frontend devices with |
| * different types (terrestrial and cable, for example), |
| * a pure DVBv3 application won't be able to use all delivery |
| * systems. Yet, changing the DVBv5 cache to the other delivery |
| * system should be enough for making it work. |
| */ |
| switch (dvbv3_type(c->delivery_system)) { |
| case DVBV3_QPSK: |
| info->type = FE_QPSK; |
| break; |
| case DVBV3_ATSC: |
| info->type = FE_ATSC; |
| break; |
| case DVBV3_QAM: |
| info->type = FE_QAM; |
| break; |
| case DVBV3_OFDM: |
| info->type = FE_OFDM; |
| break; |
| default: |
| dev_err(fe->dvb->device, |
| "%s: doesn't know how to handle a DVBv3 call to delivery system %i\n", |
| __func__, c->delivery_system); |
| fe->ops.info.type = FE_OFDM; |
| } |
| dev_dbg(fe->dvb->device, "%s: current delivery system on cache: %d, V3 type: %d\n", |
| __func__, c->delivery_system, fe->ops.info.type); |
| |
| /* 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_READ_BER: |
| if (fe->ops.read_ber) { |
| if (fepriv->thread) |
| err = fe->ops.read_ber(fe, (__u32 *) parg); |
| else |
| err = -EAGAIN; |
| } |
| break; |
| |
| case FE_READ_SIGNAL_STRENGTH: |
| if (fe->ops.read_signal_strength) { |
| if (fepriv->thread) |
| err = fe->ops.read_signal_strength(fe, (__u16 *) parg); |
| else |
| err = -EAGAIN; |
| } |
| break; |
| |
| case FE_READ_SNR: |
| if (fe->ops.read_snr) { |
| if (fepriv->thread) |
| err = fe->ops.read_snr(fe, (__u16 *) parg); |
| else |
| err = -EAGAIN; |
| } |
| break; |
| |
| case FE_READ_UNCORRECTED_BLOCKS: |
| if (fe->ops.read_ucblocks) { |
| if (fepriv->thread) |
| err = fe->ops.read_ucblocks(fe, (__u32 *) parg); |
| else |
| err = -EAGAIN; |
| } |
| break; |
| |
| case FE_DISEQC_RESET_OVERLOAD: |
| if (fe->ops.diseqc_reset_overload) { |
| err = fe->ops.diseqc_reset_overload(fe); |
| fepriv->state = FESTATE_DISEQC; |
| fepriv->status = 0; |
| } |
| break; |
| |
| case FE_DISEQC_SEND_MASTER_CMD: |
| if (fe->ops.diseqc_send_master_cmd) { |
| 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_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("%s switch command: 0x%04lx\n", |
| __func__, 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("%s(%d): switch delay (should be 32k followed by all 8k)\n", |
| __func__, 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; |
| |
| case FE_DISEQC_RECV_SLAVE_REPLY: |
| if (fe->ops.diseqc_recv_slave_reply) |
| err = fe->ops.diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); |
| break; |
| |
| case FE_ENABLE_HIGH_LNB_VOLTAGE: |
| if (fe->ops.enable_high_lnb_voltage) |
| err = fe->ops.enable_high_lnb_voltage(fe, (long) parg); |
| break; |
| |
| case FE_SET_FRONTEND: |
| err = dvbv3_set_delivery_system(fe); |
| if (err) |
| break; |
| |
| err = dtv_property_cache_sync(fe, c, parg); |
| if (err) |
| break; |
| err = dtv_set_frontend(fe); |
| break; |
| case FE_GET_EVENT: |
| err = dvb_frontend_get_event (fe, parg, file->f_flags); |
| break; |
| |
| case FE_GET_FRONTEND: { |
| struct dtv_frontend_properties getp = fe->dtv_property_cache; |
| |
| /* |
| * 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. |
| */ |
| err = dtv_get_frontend(fe, &getp, parg); |
| break; |
| } |
| case FE_SET_FRONTEND_TUNE_MODE: |
| fepriv->tune_mode_flags = (unsigned long) parg; |
| err = 0; |
| break; |
| } |
| |
| return err; |
| } |
| |
| |
| static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) |
| { |
| struct dvb_device *dvbdev = file->private_data; |
| struct dvb_frontend *fe = dvbdev->priv; |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| |
| dev_dbg_ratelimited(fe->dvb->device, "%s:\n", __func__); |
| |
| poll_wait (file, &fepriv->events.wait_queue, wait); |
| |
| if (fepriv->events.eventw != fepriv->events.eventr) |
| return (POLLIN | POLLRDNORM | POLLPRI); |
| |
| return 0; |
| } |
| |
| static int dvb_frontend_open(struct inode *inode, struct file *file) |
| { |
| struct dvb_device *dvbdev = file->private_data; |
| struct dvb_frontend *fe = dvbdev->priv; |
| struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| struct dvb_adapter *adapter = fe->dvb; |
| int ret; |
| |
| dev_dbg(fe->dvb->device, "%s:\n", __func__); |
| if (fe->exit == DVB_FE_DEVICE_REMOVED) |
| return -ENODEV; |
| |
| if (adapter->mfe_shared) { |
| mutex_lock (&adapter->mfe_lock); |
| |
| if (adapter->mfe_dvbdev == NULL) |
| adapter->mfe_dvbdev = dvbdev; |
| |
| else if (adapter->mfe_dvbdev != dvbdev) { |
| struct dvb_device |
| *mfedev = adapter->mfe_dvbdev; |
| struct dvb_frontend |
| *mfe = mfedev->priv; |
| struct dvb_frontend_private |
| *mfepriv = mfe->frontend_priv; |
| int mferetry = (dvb_mfe_wait_time << 1); |
| |
| mutex_unlock (&adapter->mfe_lock); |
| while (mferetry-- && (mfedev->users != -1 || |
| mfepriv->thread != NULL)) { |
| if(msleep_interruptible(500)) { |
| if(signal_pending(current)) |
| return -EINTR; |
| } |
| } |
| |
| mutex_lock (&adapter->mfe_lock); |
| if(adapter->mfe_dvbdev != dvbdev) { |
| mfedev = adapter->mfe_dvbdev; |
| mfe = mfedev->priv; |
| mfepriv = mfe->frontend_priv; |
| if (mfedev->users != -1 || |
| mfepriv->thread != NULL) { |
| mutex_unlock (&adapter->mfe_lock); |
| return -EBUSY; |
| } |
| adapter->mfe_dvbdev = dvbdev; |
| } |
| } |
| } |
| |
| if (dvbdev->users == -1 && fe->ops.ts_bus_ctrl) { |
| if ((ret = fe->ops.ts_bus_ctrl(fe, 1)) < 0) |
| goto err0; |
| |
| /* If we took control of the bus, we need to force |
| reinitialization. This is because many ts_bus_ctrl() |
| functions strobe the RESET pin on the demod, and if the |
| frontend thread already exists then the dvb_init() routine |
| won't get called (which is what usually does initial |
| register configuration). */ |
| fepriv->reinitialise = 1; |
| } |
| |
| if ((ret = dvb_generic_open (inode, file)) < 0) |
| goto err1; |
| |
| if ((file->f_flags & O_ACCMODE) != O_RDONLY) { |
| /* normal tune mode when opened R/W */ |
| fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; |
| fepriv->tone = -1; |
| fepriv->voltage = -1; |
| |
| #ifdef CONFIG_MEDIA_CONTROLLER_DVB |
| 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) { |
| dev_err(fe->dvb->device, |
| "Tuner is busy. Error %d\n", ret); |
| goto err2; |
| } |
| } |
| #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 |
| 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); |
| } |
| 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 |
| 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); |
| } |
| #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_generic_ioctl, |
| .poll = dvb_frontend_poll, |
| .open = dvb_frontend_open, |
| .release = dvb_frontend_release, |
| .llseek = noop_llseek, |
| }; |
| |
| int dvb_frontend_suspend(struct dvb_frontend *fe) |
| { |
| int ret = 0; |
| |
| dev_dbg(fe->dvb->device, "%s: adap=%d fe=%d\n", __func__, fe->dvb->num, |
| fe->id); |
| |
| if (fe->ops.tuner_ops.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 |
| .kernel_ioctl = dvb_frontend_ioctl |
| }; |
| |
| dev_dbg(dvb->device, "%s:\n", __func__); |
| |
| if (mutex_lock_interruptible(&frontend_mutex)) |
| return -ERESTARTSYS; |
| |
| fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); |
| if (fe->frontend_priv == NULL) { |
| mutex_unlock(&frontend_mutex); |
| return -ENOMEM; |
| } |
| fepriv = fe->frontend_priv; |
| |
| 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_invoke_release(fe, fe->ops.detach); |
| dvb_frontend_put(fe); |
| } |
| EXPORT_SYMBOL(dvb_frontend_detach); |