diff options
Diffstat (limited to 'drivers/media/dvb/dvb-core/dvb_frontend.c')
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvb_frontend.c | 948 |
1 files changed, 0 insertions, 948 deletions
diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c deleted file mode 100644 index a8bc84240b5..00000000000 --- a/drivers/media/dvb/dvb-core/dvb_frontend.c +++ /dev/null @@ -1,948 +0,0 @@ -/* - * dvb_frontend.c: DVB frontend tuning interface/thread - * - * - * Copyright (C) 1999-2001 Ralph Metzler - * Marcus Metzler - * Holger Waechtler - * for convergence integrated media GmbH - * - * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup) - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * Or, point your browser to http://www.gnu.org/copyleft/gpl.html - */ - -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/wait.h> -#include <linux/slab.h> -#include <linux/poll.h> -#include <linux/module.h> -#include <linux/moduleparam.h> -#include <linux/list.h> -#include <linux/suspend.h> -#include <linux/jiffies.h> -#include <asm/processor.h> -#include <asm/semaphore.h> - -#include "dvb_frontend.h" -#include "dvbdev.h" - -// #define DEBUG_LOCKLOSS 1 - -static int dvb_frontend_debug; -static int dvb_shutdown_timeout = 5; -static int dvb_force_auto_inversion; -static int dvb_override_tune_delay; -static int dvb_powerdown_on_sleep = 1; - -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, 0444); -MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware"); -module_param(dvb_force_auto_inversion, int, 0444); -MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always"); -module_param(dvb_override_tune_delay, int, 0444); -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, 0444); -MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB volatage off on sleep (default)"); - -#define dprintk if (dvb_frontend_debug) printk - -#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_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 DECLARE_MUTEX(frontend_mutex); - -struct dvb_frontend_private { - - struct dvb_device *dvbdev; - struct dvb_frontend_parameters parameters; - struct dvb_fe_events events; - struct semaphore sem; - struct list_head list_head; - wait_queue_head_t wait_queue; - pid_t thread_pid; - unsigned long release_jiffies; - int state; - int bending; - int lnb_drift; - int inversion; - int auto_step; - int auto_sub_step; - int started_auto_step; - int min_delay; - int max_drift; - int step_size; - int exit; - int wakeup; - fe_status_t status; - fe_sec_tone_mode_t tone; -}; - - -static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - struct dvb_fe_events *events = &fepriv->events; - struct dvb_frontend_event *e; - int wp; - - dprintk ("%s\n", __FUNCTION__); - - if (down_interruptible (&events->sem)) - return; - - 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]; - - memcpy (&e->parameters, &fepriv->parameters, - sizeof (struct dvb_frontend_parameters)); - - if (status & FE_HAS_LOCK) - if (fe->ops->get_frontend) - fe->ops->get_frontend(fe, &e->parameters); - - events->eventw = wp; - - up (&events->sem); - - e->status = status; - - 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; - - dprintk ("%s\n", __FUNCTION__); - - 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; - } - - if (down_interruptible (&events->sem)) - return -ERESTARTSYS; - - memcpy (event, &events->events[events->eventr], - sizeof(struct dvb_frontend_event)); - - events->eventr = (events->eventr + 1) % MAX_EVENT; - - up (&events->sem); - - return 0; -} - -static void dvb_frontend_init(struct dvb_frontend *fe) -{ - dprintk ("DVB: initialising frontend %i (%s)...\n", - fe->dvb->num, - fe->ops->info.name); - - if (fe->ops->init) - fe->ops->init(fe); -} - -static void update_delay(int *quality, int *delay, int min_delay, int locked) -{ - int q2; - - dprintk ("%s\n", __FUNCTION__); - - if (locked) - (*quality) = (*quality * 220 + 36*256) / 256; - else - (*quality) = (*quality * 220 + 0) / 256; - - q2 = *quality - 128; - q2 *= q2; - - *delay = 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_autotune(struct dvb_frontend *fe, int check_wrapped) -{ - int autoinversion; - int ready = 0; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - int original_inversion = fepriv->parameters.inversion; - u32 original_frequency = fepriv->parameters.frequency; - - /* are we using autoinversion? */ - autoinversion = ((!(fe->ops->info.caps & FE_CAN_INVERSION_AUTO)) && - (fepriv->parameters.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; - } - - dprintk("%s: drift:%i inversion:%i auto_step:%i " - "auto_sub_step:%i started_auto_step:%i\n", - __FUNCTION__, fepriv->lnb_drift, fepriv->inversion, - fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step); - - /* set the frontend itself */ - fepriv->parameters.frequency += fepriv->lnb_drift; - if (autoinversion) - fepriv->parameters.inversion = fepriv->inversion; - if (fe->ops->set_frontend) - fe->ops->set_frontend(fe, &fepriv->parameters); - - fepriv->parameters.frequency = original_frequency; - fepriv->parameters.inversion = original_inversion; - - fepriv->auto_sub_step++; - return 0; -} - -static int dvb_frontend_is_exiting(struct dvb_frontend *fe) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - if (fepriv->exit) - return 1; - - if (fepriv->dvbdev->writers == 1) - if (time_after(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); -} - -/* - * FIXME: use linux/kthread.h - */ -static int dvb_frontend_thread(void *data) -{ - struct dvb_frontend *fe = data; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - unsigned long timeout; - char name [15]; - int quality = 0, delay = 3*HZ; - fe_status_t s; - int check_wrapped = 0; - - dprintk("%s\n", __FUNCTION__); - - snprintf (name, sizeof(name), "kdvb-fe-%i", fe->dvb->num); - - lock_kernel(); - daemonize(name); - sigfillset(¤t->blocked); - unlock_kernel(); - - fepriv->status = 0; - dvb_frontend_init(fe); - fepriv->wakeup = 0; - - while (1) { - up(&fepriv->sem); /* is locked when we enter the thread... */ - - timeout = wait_event_interruptible_timeout(fepriv->wait_queue, - dvb_frontend_should_wakeup(fe), - delay); - if (0 != dvb_frontend_is_exiting(fe)) { - /* got signal or quitting */ - break; - } - - try_to_freeze(); - - if (down_interruptible(&fepriv->sem)) - break; - - /* if we've got no parameters, just keep idling */ - if (fepriv->state & FESTATE_IDLE) { - delay = 3*HZ; - quality = 0; - continue; - } - - /* 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)) { - update_delay(&quality, &delay, fepriv->min_delay, 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)) && - (fepriv->parameters.inversion == INVERSION_AUTO)) { - fepriv->parameters.inversion = fepriv->inversion; - } - continue; - } - - /* if we are tuned already, check we're still locked */ - if (fepriv->state & FESTATE_TUNED) { - update_delay(&quality, &delay, fepriv->min_delay, s & FE_HAS_LOCK); - - /* we're tuned, and the lock is still good... */ - if (s & FE_HAS_LOCK) - continue; - else { /* if we _WERE_ tuned, but now don't have a lock */ -#ifdef DEBUG_LOCKLOSS - /* first of all try setting the tone again if it was on - this - * sometimes works around problems with noisy power supplies */ - if (fe->ops->set_tone && (fepriv->tone == SEC_TONE_ON)) { - fe->ops->set_tone(fe, fepriv->tone); - mdelay(100); - s = 0; - fe->ops->read_status(fe, &s); - if (s & FE_HAS_LOCK) { - printk("DVB%i: Lock was lost, but regained by setting " - "the tone. This may indicate your power supply " - "is noisy/slightly incompatable with this DVB-S " - "adapter\n", fe->dvb->num); - fepriv->state = FESTATE_TUNED; - continue; - } - } -#endif - /* some other reason for losing the lock - start zigzagging */ - fepriv->state = FESTATE_ZIGZAG_FAST; - fepriv->started_auto_step = fepriv->auto_step; - 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)) { - update_delay(&quality, &delay, fepriv->min_delay, s & FE_HAS_LOCK); - continue; - } - - /* 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) { - update_delay(&quality, &delay, fepriv->min_delay, s & FE_HAS_LOCK); - continue; - } - - /* 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; - check_wrapped = 0; - } - - /* fast zigzag. */ - if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { - delay = fepriv->min_delay; - - /* peform a tune */ - if (dvb_frontend_autotune(fe, check_wrapped)) { - /* 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; - continue; - } - 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) { - update_delay(&quality, &delay, fepriv->min_delay, s & FE_HAS_LOCK); - - /* Note: don't bother checking for wrapping; we stay in this - * state until we get a lock */ - dvb_frontend_autotune(fe, 0); - } - } - - if (dvb_shutdown_timeout) { - if (dvb_powerdown_on_sleep) - if (fe->ops->set_voltage) - fe->ops->set_voltage(fe, SEC_VOLTAGE_OFF); - if (fe->ops->sleep) - fe->ops->sleep(fe); - } - - fepriv->thread_pid = 0; - mb(); - - dvb_frontend_wakeup(fe); - return 0; -} - -static void dvb_frontend_stop(struct dvb_frontend *fe) -{ - unsigned long ret; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - dprintk ("%s\n", __FUNCTION__); - - fepriv->exit = 1; - mb(); - - if (!fepriv->thread_pid) - return; - - /* check if the thread is really alive */ - if (kill_proc(fepriv->thread_pid, 0, 1) == -ESRCH) { - printk("dvb_frontend_stop: thread PID %d already died\n", - fepriv->thread_pid); - /* make sure the mutex was not held by the thread */ - init_MUTEX (&fepriv->sem); - return; - } - - /* wake up the frontend thread, so it notices that fe->exit == 1 */ - dvb_frontend_wakeup(fe); - - /* wait until the frontend thread has exited */ - ret = wait_event_interruptible(fepriv->wait_queue,0 == fepriv->thread_pid); - if (-ERESTARTSYS != ret) { - fepriv->state = FESTATE_IDLE; - return; - } - fepriv->state = FESTATE_IDLE; - - /* paranoia check in case a signal arrived */ - if (fepriv->thread_pid) - printk("dvb_frontend_stop: warning: thread PID %d won't exit\n", - fepriv->thread_pid); -} - -static int dvb_frontend_start(struct dvb_frontend *fe) -{ - int ret; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - dprintk ("%s\n", __FUNCTION__); - - if (fepriv->thread_pid) { - if (!fepriv->exit) - return 0; - else - dvb_frontend_stop (fe); - } - - if (signal_pending(current)) - return -EINTR; - if (down_interruptible (&fepriv->sem)) - return -EINTR; - - fepriv->state = FESTATE_IDLE; - fepriv->exit = 0; - fepriv->thread_pid = 0; - mb(); - - ret = kernel_thread (dvb_frontend_thread, fe, 0); - - if (ret < 0) { - printk("dvb_frontend_start: failed to start kernel_thread (%d)\n", ret); - up(&fepriv->sem); - return ret; - } - fepriv->thread_pid = ret; - - return 0; -} - -static int dvb_frontend_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, void *parg) -{ - struct dvb_device *dvbdev = file->private_data; - struct dvb_frontend *fe = dvbdev->priv; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - int err = -EOPNOTSUPP; - - dprintk ("%s\n", __FUNCTION__); - - if (!fe || fepriv->exit) - return -ENODEV; - - if ((file->f_flags & O_ACCMODE) == O_RDONLY && - (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || - cmd == FE_DISEQC_RECV_SLAVE_REPLY)) - return -EPERM; - - if (down_interruptible (&fepriv->sem)) - return -ERESTARTSYS; - - switch (cmd) { - case FE_GET_INFO: { - struct dvb_frontend_info* info = parg; - memcpy(info, &fe->ops->info, sizeof(struct dvb_frontend_info)); - - /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't - * do it, it is done for it. */ - info->caps |= FE_CAN_INVERSION_AUTO; - err = 0; - break; - } - - case FE_READ_STATUS: { - fe_status_t* status = parg; - - /* if retune was requested but hasn't occured yet, prevent - * that user get signal state from previous tuning */ - if(fepriv->state == FESTATE_RETUNE) { - err=0; - *status = 0; - break; - } - - if (fe->ops->read_status) - err = fe->ops->read_status(fe, status); - break; - } - case FE_READ_BER: - if (fe->ops->read_ber) - err = fe->ops->read_ber(fe, (__u32*) parg); - break; - - case FE_READ_SIGNAL_STRENGTH: - if (fe->ops->read_signal_strength) - err = fe->ops->read_signal_strength(fe, (__u16*) parg); - break; - - case FE_READ_SNR: - if (fe->ops->read_snr) - err = fe->ops->read_snr(fe, (__u16*) parg); - break; - - case FE_READ_UNCORRECTED_BLOCKS: - if (fe->ops->read_ucblocks) - err = fe->ops->read_ucblocks(fe, (__u32*) parg); - break; - - - case FE_DISEQC_RESET_OVERLOAD: - if (fe->ops->diseqc_reset_overload) { - err = fe->ops->diseqc_reset_overload(fe); - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - } - break; - - case FE_DISEQC_SEND_MASTER_CMD: - if (fe->ops->diseqc_send_master_cmd) { - err = fe->ops->diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - } - break; - - case FE_DISEQC_SEND_BURST: - if (fe->ops->diseqc_send_burst) { - err = fe->ops->diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - } - break; - - case FE_SET_TONE: - if (fe->ops->set_tone) { - err = fe->ops->set_tone(fe, (fe_sec_tone_mode_t) parg); - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - fepriv->tone = (fe_sec_tone_mode_t) parg; - } - break; - - case FE_SET_VOLTAGE: - if (fe->ops->set_voltage) { - err = fe->ops->set_voltage(fe, (fe_sec_voltage_t) parg); - fepriv->state = FESTATE_DISEQC; - fepriv->status = 0; - } - break; - - case FE_DISHNETWORK_SEND_LEGACY_CMD: - if (fe->ops->dishnetwork_send_legacy_command) { - err = fe->ops->dishnetwork_send_legacy_command(fe, (unsigned int) 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, (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, (int) parg); - break; - - case FE_SET_FRONTEND: { - struct dvb_frontend_tune_settings fetunesettings; - - memcpy (&fepriv->parameters, parg, - sizeof (struct dvb_frontend_parameters)); - - memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); - memcpy(&fetunesettings.parameters, parg, - sizeof (struct dvb_frontend_parameters)); - - /* force auto frequency inversion if requested */ - if (dvb_force_auto_inversion) { - fepriv->parameters.inversion = INVERSION_AUTO; - fetunesettings.parameters.inversion = INVERSION_AUTO; - } - if (fe->ops->info.type == FE_OFDM) { - /* without hierachical coding code_rate_LP is irrelevant, - * so we tolerate the otherwise invalid FEC_NONE setting */ - if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE && - fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE) - fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO; - } - - /* get frontend-specific tuning settings */ - if (fe->ops->get_tune_settings && (fe->ops->get_tune_settings(fe, &fetunesettings) == 0)) { - fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; - fepriv->max_drift = fetunesettings.max_drift; - fepriv->step_size = fetunesettings.step_size; - } else { - /* default values */ - switch(fe->ops->info.type) { - case FE_QPSK: - fepriv->min_delay = HZ/20; - fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000; - fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000; - break; - - case FE_QAM: - fepriv->min_delay = HZ/20; - fepriv->step_size = 0; /* no zigzag */ - fepriv->max_drift = 0; - break; - - case FE_OFDM: - fepriv->min_delay = HZ/20; - fepriv->step_size = fe->ops->info.frequency_stepsize * 2; - fepriv->max_drift = (fe->ops->info.frequency_stepsize * 2) + 1; - break; - case FE_ATSC: - printk("dvb-core: FE_ATSC not handled yet.\n"); - break; - } - } - if (dvb_override_tune_delay > 0) - fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; - - fepriv->state = FESTATE_RETUNE; - dvb_frontend_wakeup(fe); - dvb_frontend_add_event(fe, 0); - fepriv->status = 0; - err = 0; - break; - } - - case FE_GET_EVENT: - err = dvb_frontend_get_event (fe, parg, file->f_flags); - break; - - case FE_GET_FRONTEND: - if (fe->ops->get_frontend) { - memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters)); - err = fe->ops->get_frontend(fe, (struct dvb_frontend_parameters*) parg); - } - break; - }; - - up (&fepriv->sem); - return err; -} - -static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) -{ - struct dvb_device *dvbdev = file->private_data; - struct dvb_frontend *fe = dvbdev->priv; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - dprintk ("%s\n", __FUNCTION__); - - poll_wait (file, &fepriv->events.wait_queue, wait); - - if (fepriv->events.eventw != fepriv->events.eventr) - return (POLLIN | POLLRDNORM | POLLPRI); - - return 0; -} - -static int dvb_frontend_open(struct inode *inode, struct file *file) -{ - struct dvb_device *dvbdev = file->private_data; - struct dvb_frontend *fe = dvbdev->priv; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - int ret; - - dprintk ("%s\n", __FUNCTION__); - - if ((ret = dvb_generic_open (inode, file)) < 0) - return ret; - - if ((file->f_flags & O_ACCMODE) != O_RDONLY) { - ret = dvb_frontend_start (fe); - if (ret) - dvb_generic_release (inode, file); - - /* empty event queue */ - fepriv->events.eventr = fepriv->events.eventw = 0; - } - - return ret; -} - -static int dvb_frontend_release(struct inode *inode, struct file *file) -{ - struct dvb_device *dvbdev = file->private_data; - struct dvb_frontend *fe = dvbdev->priv; - struct dvb_frontend_private *fepriv = fe->frontend_priv; - - dprintk ("%s\n", __FUNCTION__); - - if ((file->f_flags & O_ACCMODE) != O_RDONLY) - fepriv->release_jiffies = jiffies; - - return dvb_generic_release (inode, file); -} - -static struct file_operations dvb_frontend_fops = { - .owner = THIS_MODULE, - .ioctl = dvb_generic_ioctl, - .poll = dvb_frontend_poll, - .open = dvb_frontend_open, - .release = dvb_frontend_release -}; - -int dvb_register_frontend(struct dvb_adapter* dvb, - struct dvb_frontend* fe) -{ - struct dvb_frontend_private *fepriv; - static const struct dvb_device dvbdev_template = { - .users = ~0, - .writers = 1, - .readers = (~0)-1, - .fops = &dvb_frontend_fops, - .kernel_ioctl = dvb_frontend_ioctl - }; - - dprintk ("%s\n", __FUNCTION__); - - if (down_interruptible (&frontend_mutex)) - return -ERESTARTSYS; - - fe->frontend_priv = kmalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); - if (fe->frontend_priv == NULL) { - up(&frontend_mutex); - return -ENOMEM; - } - fepriv = fe->frontend_priv; - memset(fe->frontend_priv, 0, sizeof(struct dvb_frontend_private)); - - init_MUTEX (&fepriv->sem); - init_waitqueue_head (&fepriv->wait_queue); - init_waitqueue_head (&fepriv->events.wait_queue); - init_MUTEX (&fepriv->events.sem); - fe->dvb = dvb; - fepriv->inversion = INVERSION_OFF; - fepriv->tone = SEC_TONE_OFF; - - printk ("DVB: registering frontend %i (%s)...\n", - fe->dvb->num, - fe->ops->info.name); - - dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, - fe, DVB_DEVICE_FRONTEND); - - up (&frontend_mutex); - return 0; -} -EXPORT_SYMBOL(dvb_register_frontend); - -int dvb_unregister_frontend(struct dvb_frontend* fe) -{ - struct dvb_frontend_private *fepriv = fe->frontend_priv; - dprintk ("%s\n", __FUNCTION__); - - down (&frontend_mutex); - dvb_unregister_device (fepriv->dvbdev); - dvb_frontend_stop (fe); - if (fe->ops->release) - fe->ops->release(fe); - else - printk("dvb_frontend: Demodulator (%s) does not have a release callback!\n", fe->ops->info.name); - /* fe is invalid now */ - kfree(fepriv); - up (&frontend_mutex); - return 0; -} -EXPORT_SYMBOL(dvb_unregister_frontend); |