Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * dvb_frontend.c: DVB frontend tuning interface/thread |
| 3 | * |
| 4 | * |
| 5 | * Copyright (C) 1999-2001 Ralph Metzler |
| 6 | * Marcus Metzler |
| 7 | * Holger Waechtler |
| 8 | * for convergence integrated media GmbH |
| 9 | * |
| 10 | * Copyright (C) 2004 Andrew de Quincey (tuning thread cleanup) |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License |
| 14 | * as published by the Free Software Foundation; either version 2 |
| 15 | * of the License, or (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 25 | * Or, point your browser to http://www.gnu.org/copyleft/gpl.html |
| 26 | */ |
| 27 | |
| 28 | #include <linux/string.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/sched.h> |
| 31 | #include <linux/wait.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/poll.h> |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/moduleparam.h> |
| 36 | #include <linux/list.h> |
| 37 | #include <linux/suspend.h> |
Johannes Stezenbach | cc89c22 | 2005-06-23 22:02:39 -0700 | [diff] [blame] | 38 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | #include <asm/processor.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | #include "dvb_frontend.h" |
| 42 | #include "dvbdev.h" |
| 43 | |
| 44 | static int dvb_frontend_debug; |
| 45 | static int dvb_shutdown_timeout = 5; |
| 46 | static int dvb_force_auto_inversion; |
| 47 | static int dvb_override_tune_delay; |
| 48 | static int dvb_powerdown_on_sleep = 1; |
| 49 | |
| 50 | module_param_named(frontend_debug, dvb_frontend_debug, int, 0644); |
Johannes Stezenbach | f4f009a | 2005-05-16 21:54:21 -0700 | [diff] [blame] | 51 | MODULE_PARM_DESC(frontend_debug, "Turn on/off frontend core debugging (default:off)."); |
Manu Abraham | 6baad3f | 2006-02-27 00:09:32 -0300 | [diff] [blame] | 52 | module_param(dvb_shutdown_timeout, int, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | MODULE_PARM_DESC(dvb_shutdown_timeout, "wait <shutdown_timeout> seconds after close() before suspending hardware"); |
Manu Abraham | 6baad3f | 2006-02-27 00:09:32 -0300 | [diff] [blame] | 54 | module_param(dvb_force_auto_inversion, int, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | MODULE_PARM_DESC(dvb_force_auto_inversion, "0: normal (default), 1: INVERSION_AUTO forced always"); |
Manu Abraham | 6baad3f | 2006-02-27 00:09:32 -0300 | [diff] [blame] | 56 | module_param(dvb_override_tune_delay, int, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | MODULE_PARM_DESC(dvb_override_tune_delay, "0: normal (default), >0 => delay in milliseconds to wait for lock after a tune attempt"); |
Manu Abraham | 6baad3f | 2006-02-27 00:09:32 -0300 | [diff] [blame] | 58 | module_param(dvb_powerdown_on_sleep, int, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | MODULE_PARM_DESC(dvb_powerdown_on_sleep, "0: do not power down, 1: turn LNB volatage off on sleep (default)"); |
| 60 | |
| 61 | #define dprintk if (dvb_frontend_debug) printk |
| 62 | |
| 63 | #define FESTATE_IDLE 1 |
| 64 | #define FESTATE_RETUNE 2 |
| 65 | #define FESTATE_TUNING_FAST 4 |
| 66 | #define FESTATE_TUNING_SLOW 8 |
| 67 | #define FESTATE_TUNED 16 |
| 68 | #define FESTATE_ZIGZAG_FAST 32 |
| 69 | #define FESTATE_ZIGZAG_SLOW 64 |
| 70 | #define FESTATE_DISEQC 128 |
| 71 | #define FESTATE_WAITFORLOCK (FESTATE_TUNING_FAST | FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW | FESTATE_DISEQC) |
| 72 | #define FESTATE_SEARCHING_FAST (FESTATE_TUNING_FAST | FESTATE_ZIGZAG_FAST) |
| 73 | #define FESTATE_SEARCHING_SLOW (FESTATE_TUNING_SLOW | FESTATE_ZIGZAG_SLOW) |
| 74 | #define FESTATE_LOSTLOCK (FESTATE_ZIGZAG_FAST | FESTATE_ZIGZAG_SLOW) |
| 75 | /* |
| 76 | * FESTATE_IDLE. No tuning parameters have been supplied and the loop is idling. |
| 77 | * FESTATE_RETUNE. Parameters have been supplied, but we have not yet performed the first tune. |
| 78 | * FESTATE_TUNING_FAST. Tuning parameters have been supplied and fast zigzag scan is in progress. |
| 79 | * FESTATE_TUNING_SLOW. Tuning parameters have been supplied. Fast zigzag failed, so we're trying again, but slower. |
| 80 | * FESTATE_TUNED. The frontend has successfully locked on. |
| 81 | * FESTATE_ZIGZAG_FAST. The lock has been lost, and a fast zigzag has been initiated to try and regain it. |
| 82 | * FESTATE_ZIGZAG_SLOW. The lock has been lost. Fast zigzag has been failed, so we're trying again, but slower. |
| 83 | * FESTATE_DISEQC. A DISEQC command has just been issued. |
| 84 | * FESTATE_WAITFORLOCK. When we're waiting for a lock. |
| 85 | * FESTATE_SEARCHING_FAST. When we're searching for a signal using a fast zigzag scan. |
| 86 | * FESTATE_SEARCHING_SLOW. When we're searching for a signal using a slow zigzag scan. |
| 87 | * FESTATE_LOSTLOCK. When the lock has been lost, and we're searching it again. |
| 88 | */ |
| 89 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 90 | static DEFINE_MUTEX(frontend_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | struct dvb_frontend_private { |
| 93 | |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 94 | /* thread/frontend values */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | struct dvb_device *dvbdev; |
| 96 | struct dvb_frontend_parameters parameters; |
| 97 | struct dvb_fe_events events; |
| 98 | struct semaphore sem; |
| 99 | struct list_head list_head; |
| 100 | wait_queue_head_t wait_queue; |
| 101 | pid_t thread_pid; |
| 102 | unsigned long release_jiffies; |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 103 | unsigned int exit; |
| 104 | unsigned int wakeup; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | fe_status_t status; |
Peter Beutner | 400b708 | 2006-01-09 15:32:43 -0200 | [diff] [blame] | 106 | unsigned long tune_mode_flags; |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 107 | unsigned int delay; |
Andrew de Quincey | 86f40cc | 2006-03-30 15:53:35 -0300 | [diff] [blame] | 108 | unsigned int reinitialise; |
Andrew de Quincey | 6445401 | 2006-04-06 14:32:23 -0300 | [diff] [blame] | 109 | int tone; |
| 110 | int voltage; |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 111 | |
| 112 | /* swzigzag values */ |
| 113 | unsigned int state; |
| 114 | unsigned int bending; |
| 115 | int lnb_drift; |
| 116 | unsigned int inversion; |
| 117 | unsigned int auto_step; |
| 118 | unsigned int auto_sub_step; |
| 119 | unsigned int started_auto_step; |
| 120 | unsigned int min_delay; |
| 121 | unsigned int max_drift; |
| 122 | unsigned int step_size; |
| 123 | int quality; |
| 124 | unsigned int check_wrapped; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | }; |
| 126 | |
Andrew de Quincey | 86f40cc | 2006-03-30 15:53:35 -0300 | [diff] [blame] | 127 | static void dvb_frontend_wakeup(struct dvb_frontend *fe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
| 129 | static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status) |
| 130 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 131 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | struct dvb_fe_events *events = &fepriv->events; |
| 133 | struct dvb_frontend_event *e; |
| 134 | int wp; |
| 135 | |
| 136 | dprintk ("%s\n", __FUNCTION__); |
| 137 | |
| 138 | if (down_interruptible (&events->sem)) |
| 139 | return; |
| 140 | |
| 141 | wp = (events->eventw + 1) % MAX_EVENT; |
| 142 | |
| 143 | if (wp == events->eventr) { |
| 144 | events->overflow = 1; |
| 145 | events->eventr = (events->eventr + 1) % MAX_EVENT; |
| 146 | } |
| 147 | |
| 148 | e = &events->events[events->eventw]; |
| 149 | |
| 150 | memcpy (&e->parameters, &fepriv->parameters, |
| 151 | sizeof (struct dvb_frontend_parameters)); |
| 152 | |
| 153 | if (status & FE_HAS_LOCK) |
| 154 | if (fe->ops->get_frontend) |
| 155 | fe->ops->get_frontend(fe, &e->parameters); |
| 156 | |
| 157 | events->eventw = wp; |
| 158 | |
| 159 | up (&events->sem); |
| 160 | |
| 161 | e->status = status; |
| 162 | |
| 163 | wake_up_interruptible (&events->wait_queue); |
| 164 | } |
| 165 | |
| 166 | static int dvb_frontend_get_event(struct dvb_frontend *fe, |
| 167 | struct dvb_frontend_event *event, int flags) |
| 168 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 169 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | struct dvb_fe_events *events = &fepriv->events; |
| 171 | |
| 172 | dprintk ("%s\n", __FUNCTION__); |
| 173 | |
| 174 | if (events->overflow) { |
| 175 | events->overflow = 0; |
| 176 | return -EOVERFLOW; |
| 177 | } |
| 178 | |
| 179 | if (events->eventw == events->eventr) { |
| 180 | int ret; |
| 181 | |
| 182 | if (flags & O_NONBLOCK) |
| 183 | return -EWOULDBLOCK; |
| 184 | |
| 185 | up(&fepriv->sem); |
| 186 | |
| 187 | ret = wait_event_interruptible (events->wait_queue, |
| 188 | events->eventw != events->eventr); |
| 189 | |
| 190 | if (down_interruptible (&fepriv->sem)) |
| 191 | return -ERESTARTSYS; |
| 192 | |
| 193 | if (ret < 0) |
| 194 | return ret; |
| 195 | } |
| 196 | |
| 197 | if (down_interruptible (&events->sem)) |
| 198 | return -ERESTARTSYS; |
| 199 | |
| 200 | memcpy (event, &events->events[events->eventr], |
| 201 | sizeof(struct dvb_frontend_event)); |
| 202 | |
| 203 | events->eventr = (events->eventr + 1) % MAX_EVENT; |
| 204 | |
| 205 | up (&events->sem); |
| 206 | |
| 207 | return 0; |
| 208 | } |
| 209 | |
| 210 | static void dvb_frontend_init(struct dvb_frontend *fe) |
| 211 | { |
| 212 | dprintk ("DVB: initialising frontend %i (%s)...\n", |
| 213 | fe->dvb->num, |
| 214 | fe->ops->info.name); |
| 215 | |
| 216 | if (fe->ops->init) |
| 217 | fe->ops->init(fe); |
| 218 | } |
| 219 | |
Andrew de Quincey | 86f40cc | 2006-03-30 15:53:35 -0300 | [diff] [blame] | 220 | void dvb_frontend_reinitialise(struct dvb_frontend *fe) |
| 221 | { |
| 222 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| 223 | |
| 224 | fepriv->reinitialise = 1; |
| 225 | dvb_frontend_wakeup(fe); |
| 226 | } |
| 227 | EXPORT_SYMBOL(dvb_frontend_reinitialise); |
| 228 | |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 229 | static void dvb_frontend_swzigzag_update_delay(struct dvb_frontend_private *fepriv, int locked) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | { |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 231 | int q2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 233 | dprintk ("%s\n", __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 235 | if (locked) |
| 236 | (fepriv->quality) = (fepriv->quality * 220 + 36*256) / 256; |
| 237 | else |
| 238 | (fepriv->quality) = (fepriv->quality * 220 + 0) / 256; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 240 | q2 = fepriv->quality - 128; |
| 241 | q2 *= q2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 243 | fepriv->delay = fepriv->min_delay + q2 * HZ / (128*128); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | } |
| 245 | |
| 246 | /** |
| 247 | * Performs automatic twiddling of frontend parameters. |
| 248 | * |
| 249 | * @param fe The frontend concerned. |
| 250 | * @param check_wrapped Checks if an iteration has completed. DO NOT SET ON THE FIRST ATTEMPT |
| 251 | * @returns Number of complete iterations that have been performed. |
| 252 | */ |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 253 | static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wrapped) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | { |
| 255 | int autoinversion; |
| 256 | int ready = 0; |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 257 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | int original_inversion = fepriv->parameters.inversion; |
| 259 | u32 original_frequency = fepriv->parameters.frequency; |
| 260 | |
| 261 | /* are we using autoinversion? */ |
| 262 | autoinversion = ((!(fe->ops->info.caps & FE_CAN_INVERSION_AUTO)) && |
| 263 | (fepriv->parameters.inversion == INVERSION_AUTO)); |
| 264 | |
| 265 | /* setup parameters correctly */ |
| 266 | while(!ready) { |
| 267 | /* calculate the lnb_drift */ |
| 268 | fepriv->lnb_drift = fepriv->auto_step * fepriv->step_size; |
| 269 | |
| 270 | /* wrap the auto_step if we've exceeded the maximum drift */ |
| 271 | if (fepriv->lnb_drift > fepriv->max_drift) { |
| 272 | fepriv->auto_step = 0; |
| 273 | fepriv->auto_sub_step = 0; |
| 274 | fepriv->lnb_drift = 0; |
| 275 | } |
| 276 | |
| 277 | /* perform inversion and +/- zigzag */ |
| 278 | switch(fepriv->auto_sub_step) { |
| 279 | case 0: |
| 280 | /* try with the current inversion and current drift setting */ |
| 281 | ready = 1; |
| 282 | break; |
| 283 | |
| 284 | case 1: |
| 285 | if (!autoinversion) break; |
| 286 | |
| 287 | fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; |
| 288 | ready = 1; |
| 289 | break; |
| 290 | |
| 291 | case 2: |
| 292 | if (fepriv->lnb_drift == 0) break; |
| 293 | |
| 294 | fepriv->lnb_drift = -fepriv->lnb_drift; |
| 295 | ready = 1; |
| 296 | break; |
| 297 | |
| 298 | case 3: |
| 299 | if (fepriv->lnb_drift == 0) break; |
| 300 | if (!autoinversion) break; |
| 301 | |
| 302 | fepriv->inversion = (fepriv->inversion == INVERSION_OFF) ? INVERSION_ON : INVERSION_OFF; |
| 303 | fepriv->lnb_drift = -fepriv->lnb_drift; |
| 304 | ready = 1; |
| 305 | break; |
| 306 | |
| 307 | default: |
| 308 | fepriv->auto_step++; |
| 309 | fepriv->auto_sub_step = -1; /* it'll be incremented to 0 in a moment */ |
| 310 | break; |
| 311 | } |
| 312 | |
| 313 | if (!ready) fepriv->auto_sub_step++; |
| 314 | } |
| 315 | |
| 316 | /* if this attempt would hit where we started, indicate a complete |
| 317 | * iteration has occurred */ |
| 318 | if ((fepriv->auto_step == fepriv->started_auto_step) && |
| 319 | (fepriv->auto_sub_step == 0) && check_wrapped) { |
| 320 | return 1; |
| 321 | } |
| 322 | |
| 323 | dprintk("%s: drift:%i inversion:%i auto_step:%i " |
| 324 | "auto_sub_step:%i started_auto_step:%i\n", |
| 325 | __FUNCTION__, fepriv->lnb_drift, fepriv->inversion, |
| 326 | fepriv->auto_step, fepriv->auto_sub_step, fepriv->started_auto_step); |
| 327 | |
| 328 | /* set the frontend itself */ |
| 329 | fepriv->parameters.frequency += fepriv->lnb_drift; |
| 330 | if (autoinversion) |
| 331 | fepriv->parameters.inversion = fepriv->inversion; |
| 332 | if (fe->ops->set_frontend) |
| 333 | fe->ops->set_frontend(fe, &fepriv->parameters); |
| 334 | |
| 335 | fepriv->parameters.frequency = original_frequency; |
| 336 | fepriv->parameters.inversion = original_inversion; |
| 337 | |
| 338 | fepriv->auto_sub_step++; |
| 339 | return 0; |
| 340 | } |
| 341 | |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 342 | static void dvb_frontend_swzigzag(struct dvb_frontend *fe) |
| 343 | { |
| 344 | fe_status_t s; |
| 345 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
| 346 | |
| 347 | /* if we've got no parameters, just keep idling */ |
| 348 | if (fepriv->state & FESTATE_IDLE) { |
| 349 | fepriv->delay = 3*HZ; |
| 350 | fepriv->quality = 0; |
| 351 | return; |
| 352 | } |
| 353 | |
| 354 | /* in SCAN mode, we just set the frontend when asked and leave it alone */ |
| 355 | if (fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT) { |
| 356 | if (fepriv->state & FESTATE_RETUNE) { |
| 357 | if (fe->ops->set_frontend) |
| 358 | fe->ops->set_frontend(fe, &fepriv->parameters); |
| 359 | fepriv->state = FESTATE_TUNED; |
| 360 | } |
| 361 | fepriv->delay = 3*HZ; |
| 362 | fepriv->quality = 0; |
| 363 | return; |
| 364 | } |
| 365 | |
| 366 | /* get the frontend status */ |
| 367 | if (fepriv->state & FESTATE_RETUNE) { |
| 368 | s = 0; |
| 369 | } else { |
| 370 | if (fe->ops->read_status) |
| 371 | fe->ops->read_status(fe, &s); |
| 372 | if (s != fepriv->status) { |
| 373 | dvb_frontend_add_event(fe, s); |
| 374 | fepriv->status = s; |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | /* if we're not tuned, and we have a lock, move to the TUNED state */ |
| 379 | if ((fepriv->state & FESTATE_WAITFORLOCK) && (s & FE_HAS_LOCK)) { |
| 380 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
| 381 | fepriv->state = FESTATE_TUNED; |
| 382 | |
| 383 | /* if we're tuned, then we have determined the correct inversion */ |
| 384 | if ((!(fe->ops->info.caps & FE_CAN_INVERSION_AUTO)) && |
| 385 | (fepriv->parameters.inversion == INVERSION_AUTO)) { |
| 386 | fepriv->parameters.inversion = fepriv->inversion; |
| 387 | } |
| 388 | return; |
| 389 | } |
| 390 | |
| 391 | /* if we are tuned already, check we're still locked */ |
| 392 | if (fepriv->state & FESTATE_TUNED) { |
| 393 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
| 394 | |
| 395 | /* we're tuned, and the lock is still good... */ |
| 396 | if (s & FE_HAS_LOCK) { |
| 397 | return; |
| 398 | } else { /* if we _WERE_ tuned, but now don't have a lock */ |
| 399 | fepriv->state = FESTATE_ZIGZAG_FAST; |
| 400 | fepriv->started_auto_step = fepriv->auto_step; |
| 401 | fepriv->check_wrapped = 0; |
| 402 | } |
| 403 | } |
| 404 | |
| 405 | /* don't actually do anything if we're in the LOSTLOCK state, |
| 406 | * the frontend is set to FE_CAN_RECOVER, and the max_drift is 0 */ |
| 407 | if ((fepriv->state & FESTATE_LOSTLOCK) && |
| 408 | (fe->ops->info.caps & FE_CAN_RECOVER) && (fepriv->max_drift == 0)) { |
| 409 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
| 410 | return; |
| 411 | } |
| 412 | |
| 413 | /* don't do anything if we're in the DISEQC state, since this |
| 414 | * might be someone with a motorized dish controlled by DISEQC. |
| 415 | * If its actually a re-tune, there will be a SET_FRONTEND soon enough. */ |
| 416 | if (fepriv->state & FESTATE_DISEQC) { |
| 417 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
| 418 | return; |
| 419 | } |
| 420 | |
| 421 | /* if we're in the RETUNE state, set everything up for a brand |
| 422 | * new scan, keeping the current inversion setting, as the next |
| 423 | * tune is _very_ likely to require the same */ |
| 424 | if (fepriv->state & FESTATE_RETUNE) { |
| 425 | fepriv->lnb_drift = 0; |
| 426 | fepriv->auto_step = 0; |
| 427 | fepriv->auto_sub_step = 0; |
| 428 | fepriv->started_auto_step = 0; |
| 429 | fepriv->check_wrapped = 0; |
| 430 | } |
| 431 | |
| 432 | /* fast zigzag. */ |
| 433 | if ((fepriv->state & FESTATE_SEARCHING_FAST) || (fepriv->state & FESTATE_RETUNE)) { |
| 434 | fepriv->delay = fepriv->min_delay; |
| 435 | |
| 436 | /* peform a tune */ |
| 437 | if (dvb_frontend_swzigzag_autotune(fe, fepriv->check_wrapped)) { |
| 438 | /* OK, if we've run out of trials at the fast speed. |
| 439 | * Drop back to slow for the _next_ attempt */ |
| 440 | fepriv->state = FESTATE_SEARCHING_SLOW; |
| 441 | fepriv->started_auto_step = fepriv->auto_step; |
| 442 | return; |
| 443 | } |
| 444 | fepriv->check_wrapped = 1; |
| 445 | |
| 446 | /* if we've just retuned, enter the ZIGZAG_FAST state. |
| 447 | * This ensures we cannot return from an |
| 448 | * FE_SET_FRONTEND ioctl before the first frontend tune |
| 449 | * occurs */ |
| 450 | if (fepriv->state & FESTATE_RETUNE) { |
| 451 | fepriv->state = FESTATE_TUNING_FAST; |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | /* slow zigzag */ |
| 456 | if (fepriv->state & FESTATE_SEARCHING_SLOW) { |
| 457 | dvb_frontend_swzigzag_update_delay(fepriv, s & FE_HAS_LOCK); |
| 458 | |
| 459 | /* Note: don't bother checking for wrapping; we stay in this |
| 460 | * state until we get a lock */ |
| 461 | dvb_frontend_swzigzag_autotune(fe, 0); |
| 462 | } |
| 463 | } |
| 464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | static int dvb_frontend_is_exiting(struct dvb_frontend *fe) |
| 466 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 467 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
| 469 | if (fepriv->exit) |
| 470 | return 1; |
| 471 | |
| 472 | if (fepriv->dvbdev->writers == 1) |
Johannes Stezenbach | cc89c22 | 2005-06-23 22:02:39 -0700 | [diff] [blame] | 473 | if (time_after(jiffies, fepriv->release_jiffies + |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 474 | dvb_shutdown_timeout * HZ)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | return 1; |
| 476 | |
| 477 | return 0; |
| 478 | } |
| 479 | |
| 480 | static int dvb_frontend_should_wakeup(struct dvb_frontend *fe) |
| 481 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 482 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | |
| 484 | if (fepriv->wakeup) { |
| 485 | fepriv->wakeup = 0; |
| 486 | return 1; |
| 487 | } |
| 488 | return dvb_frontend_is_exiting(fe); |
| 489 | } |
| 490 | |
| 491 | static void dvb_frontend_wakeup(struct dvb_frontend *fe) |
| 492 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 493 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
| 495 | fepriv->wakeup = 1; |
| 496 | wake_up_interruptible(&fepriv->wait_queue); |
| 497 | } |
| 498 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | static int dvb_frontend_thread(void *data) |
| 500 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 501 | struct dvb_frontend *fe = data; |
| 502 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | unsigned long timeout; |
| 504 | char name [15]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | fe_status_t s; |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 506 | struct dvb_frontend_parameters *params; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | |
| 508 | dprintk("%s\n", __FUNCTION__); |
| 509 | |
| 510 | snprintf (name, sizeof(name), "kdvb-fe-%i", fe->dvb->num); |
| 511 | |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 512 | lock_kernel(); |
| 513 | daemonize(name); |
| 514 | sigfillset(¤t->blocked); |
| 515 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 517 | fepriv->check_wrapped = 0; |
| 518 | fepriv->quality = 0; |
| 519 | fepriv->delay = 3*HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | fepriv->status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | fepriv->wakeup = 0; |
Andrew de Quincey | 86f40cc | 2006-03-30 15:53:35 -0300 | [diff] [blame] | 522 | fepriv->reinitialise = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | |
| 524 | while (1) { |
| 525 | up(&fepriv->sem); /* is locked when we enter the thread... */ |
| 526 | |
| 527 | timeout = wait_event_interruptible_timeout(fepriv->wait_queue, |
| 528 | dvb_frontend_should_wakeup(fe), |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 529 | fepriv->delay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | if (0 != dvb_frontend_is_exiting(fe)) { |
| 531 | /* got signal or quitting */ |
| 532 | break; |
| 533 | } |
| 534 | |
Christoph Lameter | 3e1d1d2 | 2005-06-24 23:13:50 -0700 | [diff] [blame] | 535 | try_to_freeze(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | |
| 537 | if (down_interruptible(&fepriv->sem)) |
| 538 | break; |
| 539 | |
Andrew de Quincey | 86f40cc | 2006-03-30 15:53:35 -0300 | [diff] [blame] | 540 | if (fepriv->reinitialise) { |
| 541 | dvb_frontend_init(fe); |
Andrew de Quincey | 6445401 | 2006-04-06 14:32:23 -0300 | [diff] [blame] | 542 | if (fepriv->tone != -1) { |
| 543 | fe->ops->set_tone(fe, fepriv->tone); |
| 544 | } |
| 545 | if (fepriv->voltage != -1) { |
| 546 | fe->ops->set_voltage(fe, fepriv->voltage); |
| 547 | } |
Andrew de Quincey | 86f40cc | 2006-03-30 15:53:35 -0300 | [diff] [blame] | 548 | fepriv->reinitialise = 0; |
| 549 | } |
| 550 | |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 551 | /* do an iteration of the tuning loop */ |
| 552 | if (fe->ops->tune) { |
| 553 | /* have we been asked to retune? */ |
| 554 | params = NULL; |
| 555 | if (fepriv->state & FESTATE_RETUNE) { |
| 556 | params = &fepriv->parameters; |
| 557 | fepriv->state = FESTATE_TUNED; |
| 558 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 560 | fe->ops->tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | if (s != fepriv->status) { |
| 562 | dvb_frontend_add_event(fe, s); |
| 563 | fepriv->status = s; |
| 564 | } |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 565 | } else { |
| 566 | dvb_frontend_swzigzag(fe); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | } |
| 568 | } |
| 569 | |
| 570 | if (dvb_shutdown_timeout) { |
| 571 | if (dvb_powerdown_on_sleep) |
| 572 | if (fe->ops->set_voltage) |
| 573 | fe->ops->set_voltage(fe, SEC_VOLTAGE_OFF); |
| 574 | if (fe->ops->sleep) |
| 575 | fe->ops->sleep(fe); |
| 576 | } |
| 577 | |
| 578 | fepriv->thread_pid = 0; |
| 579 | mb(); |
| 580 | |
| 581 | dvb_frontend_wakeup(fe); |
| 582 | return 0; |
| 583 | } |
| 584 | |
| 585 | static void dvb_frontend_stop(struct dvb_frontend *fe) |
| 586 | { |
| 587 | unsigned long ret; |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 588 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | |
| 590 | dprintk ("%s\n", __FUNCTION__); |
| 591 | |
| 592 | fepriv->exit = 1; |
| 593 | mb(); |
| 594 | |
| 595 | if (!fepriv->thread_pid) |
| 596 | return; |
| 597 | |
| 598 | /* check if the thread is really alive */ |
| 599 | if (kill_proc(fepriv->thread_pid, 0, 1) == -ESRCH) { |
| 600 | printk("dvb_frontend_stop: thread PID %d already died\n", |
| 601 | fepriv->thread_pid); |
| 602 | /* make sure the mutex was not held by the thread */ |
| 603 | init_MUTEX (&fepriv->sem); |
| 604 | return; |
| 605 | } |
| 606 | |
| 607 | /* wake up the frontend thread, so it notices that fe->exit == 1 */ |
| 608 | dvb_frontend_wakeup(fe); |
| 609 | |
| 610 | /* wait until the frontend thread has exited */ |
| 611 | ret = wait_event_interruptible(fepriv->wait_queue,0 == fepriv->thread_pid); |
| 612 | if (-ERESTARTSYS != ret) { |
| 613 | fepriv->state = FESTATE_IDLE; |
| 614 | return; |
| 615 | } |
| 616 | fepriv->state = FESTATE_IDLE; |
| 617 | |
| 618 | /* paranoia check in case a signal arrived */ |
| 619 | if (fepriv->thread_pid) |
| 620 | printk("dvb_frontend_stop: warning: thread PID %d won't exit\n", |
| 621 | fepriv->thread_pid); |
| 622 | } |
| 623 | |
NooneImportant | 83b75b0 | 2005-11-08 21:35:27 -0800 | [diff] [blame] | 624 | s32 timeval_usec_diff(struct timeval lasttime, struct timeval curtime) |
| 625 | { |
| 626 | return ((curtime.tv_usec < lasttime.tv_usec) ? |
| 627 | 1000000 - lasttime.tv_usec + curtime.tv_usec : |
| 628 | curtime.tv_usec - lasttime.tv_usec); |
| 629 | } |
| 630 | EXPORT_SYMBOL(timeval_usec_diff); |
| 631 | |
| 632 | static inline void timeval_usec_add(struct timeval *curtime, u32 add_usec) |
| 633 | { |
| 634 | curtime->tv_usec += add_usec; |
| 635 | if (curtime->tv_usec >= 1000000) { |
| 636 | curtime->tv_usec -= 1000000; |
| 637 | curtime->tv_sec++; |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | /* |
| 642 | * Sleep until gettimeofday() > waketime + add_usec |
| 643 | * This needs to be as precise as possible, but as the delay is |
| 644 | * usually between 2ms and 32ms, it is done using a scheduled msleep |
| 645 | * followed by usleep (normally a busy-wait loop) for the remainder |
| 646 | */ |
| 647 | void dvb_frontend_sleep_until(struct timeval *waketime, u32 add_usec) |
| 648 | { |
| 649 | struct timeval lasttime; |
| 650 | s32 delta, newdelta; |
| 651 | |
| 652 | timeval_usec_add(waketime, add_usec); |
| 653 | |
| 654 | do_gettimeofday(&lasttime); |
| 655 | delta = timeval_usec_diff(lasttime, *waketime); |
| 656 | if (delta > 2500) { |
| 657 | msleep((delta - 1500) / 1000); |
| 658 | do_gettimeofday(&lasttime); |
| 659 | newdelta = timeval_usec_diff(lasttime, *waketime); |
| 660 | delta = (newdelta > delta) ? 0 : newdelta; |
| 661 | } |
| 662 | if (delta > 0) |
| 663 | udelay(delta); |
| 664 | } |
| 665 | EXPORT_SYMBOL(dvb_frontend_sleep_until); |
| 666 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | static int dvb_frontend_start(struct dvb_frontend *fe) |
| 668 | { |
| 669 | int ret; |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 670 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | |
| 672 | dprintk ("%s\n", __FUNCTION__); |
| 673 | |
| 674 | if (fepriv->thread_pid) { |
| 675 | if (!fepriv->exit) |
| 676 | return 0; |
| 677 | else |
| 678 | dvb_frontend_stop (fe); |
| 679 | } |
| 680 | |
| 681 | if (signal_pending(current)) |
| 682 | return -EINTR; |
| 683 | if (down_interruptible (&fepriv->sem)) |
| 684 | return -EINTR; |
| 685 | |
| 686 | fepriv->state = FESTATE_IDLE; |
| 687 | fepriv->exit = 0; |
| 688 | fepriv->thread_pid = 0; |
| 689 | mb(); |
| 690 | |
| 691 | ret = kernel_thread (dvb_frontend_thread, fe, 0); |
| 692 | |
| 693 | if (ret < 0) { |
| 694 | printk("dvb_frontend_start: failed to start kernel_thread (%d)\n", ret); |
| 695 | up(&fepriv->sem); |
| 696 | return ret; |
| 697 | } |
| 698 | fepriv->thread_pid = ret; |
| 699 | |
| 700 | return 0; |
| 701 | } |
| 702 | |
| 703 | static int dvb_frontend_ioctl(struct inode *inode, struct file *file, |
| 704 | unsigned int cmd, void *parg) |
| 705 | { |
| 706 | struct dvb_device *dvbdev = file->private_data; |
| 707 | struct dvb_frontend *fe = dvbdev->priv; |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 708 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | int err = -EOPNOTSUPP; |
| 710 | |
| 711 | dprintk ("%s\n", __FUNCTION__); |
| 712 | |
| 713 | if (!fe || fepriv->exit) |
| 714 | return -ENODEV; |
| 715 | |
| 716 | if ((file->f_flags & O_ACCMODE) == O_RDONLY && |
| 717 | (_IOC_DIR(cmd) != _IOC_READ || cmd == FE_GET_EVENT || |
| 718 | cmd == FE_DISEQC_RECV_SLAVE_REPLY)) |
| 719 | return -EPERM; |
| 720 | |
| 721 | if (down_interruptible (&fepriv->sem)) |
| 722 | return -ERESTARTSYS; |
| 723 | |
| 724 | switch (cmd) { |
| 725 | case FE_GET_INFO: { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 726 | struct dvb_frontend_info* info = parg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | memcpy(info, &fe->ops->info, sizeof(struct dvb_frontend_info)); |
| 728 | |
| 729 | /* Force the CAN_INVERSION_AUTO bit on. If the frontend doesn't |
| 730 | * do it, it is done for it. */ |
| 731 | info->caps |= FE_CAN_INVERSION_AUTO; |
| 732 | err = 0; |
| 733 | break; |
| 734 | } |
| 735 | |
Peter Beutner | 6757ccc | 2005-07-07 17:57:36 -0700 | [diff] [blame] | 736 | case FE_READ_STATUS: { |
| 737 | fe_status_t* status = parg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
Peter Beutner | 6757ccc | 2005-07-07 17:57:36 -0700 | [diff] [blame] | 739 | /* if retune was requested but hasn't occured yet, prevent |
| 740 | * that user get signal state from previous tuning */ |
| 741 | if(fepriv->state == FESTATE_RETUNE) { |
| 742 | err=0; |
| 743 | *status = 0; |
| 744 | break; |
| 745 | } |
| 746 | |
| 747 | if (fe->ops->read_status) |
| 748 | err = fe->ops->read_status(fe, status); |
| 749 | break; |
| 750 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | case FE_READ_BER: |
| 752 | if (fe->ops->read_ber) |
| 753 | err = fe->ops->read_ber(fe, (__u32*) parg); |
| 754 | break; |
| 755 | |
| 756 | case FE_READ_SIGNAL_STRENGTH: |
| 757 | if (fe->ops->read_signal_strength) |
| 758 | err = fe->ops->read_signal_strength(fe, (__u16*) parg); |
| 759 | break; |
| 760 | |
| 761 | case FE_READ_SNR: |
| 762 | if (fe->ops->read_snr) |
| 763 | err = fe->ops->read_snr(fe, (__u16*) parg); |
| 764 | break; |
| 765 | |
| 766 | case FE_READ_UNCORRECTED_BLOCKS: |
| 767 | if (fe->ops->read_ucblocks) |
| 768 | err = fe->ops->read_ucblocks(fe, (__u32*) parg); |
| 769 | break; |
| 770 | |
| 771 | |
| 772 | case FE_DISEQC_RESET_OVERLOAD: |
| 773 | if (fe->ops->diseqc_reset_overload) { |
| 774 | err = fe->ops->diseqc_reset_overload(fe); |
| 775 | fepriv->state = FESTATE_DISEQC; |
| 776 | fepriv->status = 0; |
| 777 | } |
| 778 | break; |
| 779 | |
| 780 | case FE_DISEQC_SEND_MASTER_CMD: |
| 781 | if (fe->ops->diseqc_send_master_cmd) { |
| 782 | err = fe->ops->diseqc_send_master_cmd(fe, (struct dvb_diseqc_master_cmd*) parg); |
| 783 | fepriv->state = FESTATE_DISEQC; |
| 784 | fepriv->status = 0; |
| 785 | } |
| 786 | break; |
| 787 | |
| 788 | case FE_DISEQC_SEND_BURST: |
| 789 | if (fe->ops->diseqc_send_burst) { |
| 790 | err = fe->ops->diseqc_send_burst(fe, (fe_sec_mini_cmd_t) parg); |
| 791 | fepriv->state = FESTATE_DISEQC; |
| 792 | fepriv->status = 0; |
| 793 | } |
| 794 | break; |
| 795 | |
| 796 | case FE_SET_TONE: |
| 797 | if (fe->ops->set_tone) { |
| 798 | err = fe->ops->set_tone(fe, (fe_sec_tone_mode_t) parg); |
Andrew de Quincey | 6445401 | 2006-04-06 14:32:23 -0300 | [diff] [blame] | 799 | fepriv->tone = (fe_sec_tone_mode_t) parg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | fepriv->state = FESTATE_DISEQC; |
| 801 | fepriv->status = 0; |
| 802 | } |
| 803 | break; |
| 804 | |
| 805 | case FE_SET_VOLTAGE: |
| 806 | if (fe->ops->set_voltage) { |
| 807 | err = fe->ops->set_voltage(fe, (fe_sec_voltage_t) parg); |
Andrew de Quincey | 6445401 | 2006-04-06 14:32:23 -0300 | [diff] [blame] | 808 | fepriv->voltage = (fe_sec_voltage_t) parg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | fepriv->state = FESTATE_DISEQC; |
| 810 | fepriv->status = 0; |
| 811 | } |
| 812 | break; |
| 813 | |
| 814 | case FE_DISHNETWORK_SEND_LEGACY_CMD: |
| 815 | if (fe->ops->dishnetwork_send_legacy_command) { |
Hans Verkuil | e18828e | 2006-01-09 15:25:28 -0200 | [diff] [blame] | 816 | err = fe->ops->dishnetwork_send_legacy_command(fe, (unsigned long) parg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | fepriv->state = FESTATE_DISEQC; |
| 818 | fepriv->status = 0; |
NooneImportant | 83b75b0 | 2005-11-08 21:35:27 -0800 | [diff] [blame] | 819 | } else if (fe->ops->set_voltage) { |
| 820 | /* |
| 821 | * NOTE: This is a fallback condition. Some frontends |
| 822 | * (stv0299 for instance) take longer than 8msec to |
| 823 | * respond to a set_voltage command. Those switches |
| 824 | * need custom routines to switch properly. For all |
| 825 | * other frontends, the following shoule work ok. |
| 826 | * Dish network legacy switches (as used by Dish500) |
| 827 | * are controlled by sending 9-bit command words |
| 828 | * spaced 8msec apart. |
| 829 | * the actual command word is switch/port dependant |
| 830 | * so it is up to the userspace application to send |
| 831 | * the right command. |
| 832 | * The command must always start with a '0' after |
| 833 | * initialization, so parg is 8 bits and does not |
| 834 | * include the initialization or start bit |
| 835 | */ |
Peter Beutner | 400b708 | 2006-01-09 15:32:43 -0200 | [diff] [blame] | 836 | unsigned long cmd = ((unsigned long) parg) << 1; |
NooneImportant | 83b75b0 | 2005-11-08 21:35:27 -0800 | [diff] [blame] | 837 | struct timeval nexttime; |
| 838 | struct timeval tv[10]; |
| 839 | int i; |
| 840 | u8 last = 1; |
| 841 | if (dvb_frontend_debug) |
Peter Beutner | 400b708 | 2006-01-09 15:32:43 -0200 | [diff] [blame] | 842 | printk("%s switch command: 0x%04lx\n", __FUNCTION__, cmd); |
NooneImportant | 83b75b0 | 2005-11-08 21:35:27 -0800 | [diff] [blame] | 843 | do_gettimeofday(&nexttime); |
| 844 | if (dvb_frontend_debug) |
| 845 | memcpy(&tv[0], &nexttime, sizeof(struct timeval)); |
| 846 | /* before sending a command, initialize by sending |
| 847 | * a 32ms 18V to the switch |
| 848 | */ |
| 849 | fe->ops->set_voltage(fe, SEC_VOLTAGE_18); |
| 850 | dvb_frontend_sleep_until(&nexttime, 32000); |
| 851 | |
| 852 | for (i = 0; i < 9; i++) { |
| 853 | if (dvb_frontend_debug) |
| 854 | do_gettimeofday(&tv[i + 1]); |
| 855 | if ((cmd & 0x01) != last) { |
| 856 | /* set voltage to (last ? 13V : 18V) */ |
| 857 | fe->ops->set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18); |
| 858 | last = (last) ? 0 : 1; |
| 859 | } |
| 860 | cmd = cmd >> 1; |
| 861 | if (i != 8) |
| 862 | dvb_frontend_sleep_until(&nexttime, 8000); |
| 863 | } |
| 864 | if (dvb_frontend_debug) { |
| 865 | printk("%s(%d): switch delay (should be 32k followed by all 8k\n", |
| 866 | __FUNCTION__, fe->dvb->num); |
| 867 | for (i = 1; i < 10; i++) |
| 868 | printk("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i])); |
| 869 | } |
| 870 | err = 0; |
| 871 | fepriv->state = FESTATE_DISEQC; |
| 872 | fepriv->status = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | } |
| 874 | break; |
| 875 | |
| 876 | case FE_DISEQC_RECV_SLAVE_REPLY: |
| 877 | if (fe->ops->diseqc_recv_slave_reply) |
| 878 | err = fe->ops->diseqc_recv_slave_reply(fe, (struct dvb_diseqc_slave_reply*) parg); |
| 879 | break; |
| 880 | |
| 881 | case FE_ENABLE_HIGH_LNB_VOLTAGE: |
| 882 | if (fe->ops->enable_high_lnb_voltage) |
Hans Verkuil | e18828e | 2006-01-09 15:25:28 -0200 | [diff] [blame] | 883 | err = fe->ops->enable_high_lnb_voltage(fe, (long) parg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 884 | break; |
| 885 | |
| 886 | case FE_SET_FRONTEND: { |
| 887 | struct dvb_frontend_tune_settings fetunesettings; |
| 888 | |
| 889 | memcpy (&fepriv->parameters, parg, |
| 890 | sizeof (struct dvb_frontend_parameters)); |
| 891 | |
| 892 | memset(&fetunesettings, 0, sizeof(struct dvb_frontend_tune_settings)); |
| 893 | memcpy(&fetunesettings.parameters, parg, |
| 894 | sizeof (struct dvb_frontend_parameters)); |
| 895 | |
| 896 | /* force auto frequency inversion if requested */ |
| 897 | if (dvb_force_auto_inversion) { |
| 898 | fepriv->parameters.inversion = INVERSION_AUTO; |
| 899 | fetunesettings.parameters.inversion = INVERSION_AUTO; |
| 900 | } |
| 901 | if (fe->ops->info.type == FE_OFDM) { |
| 902 | /* without hierachical coding code_rate_LP is irrelevant, |
| 903 | * so we tolerate the otherwise invalid FEC_NONE setting */ |
| 904 | if (fepriv->parameters.u.ofdm.hierarchy_information == HIERARCHY_NONE && |
| 905 | fepriv->parameters.u.ofdm.code_rate_LP == FEC_NONE) |
| 906 | fepriv->parameters.u.ofdm.code_rate_LP = FEC_AUTO; |
| 907 | } |
| 908 | |
| 909 | /* get frontend-specific tuning settings */ |
| 910 | if (fe->ops->get_tune_settings && (fe->ops->get_tune_settings(fe, &fetunesettings) == 0)) { |
| 911 | fepriv->min_delay = (fetunesettings.min_delay_ms * HZ) / 1000; |
| 912 | fepriv->max_drift = fetunesettings.max_drift; |
| 913 | fepriv->step_size = fetunesettings.step_size; |
| 914 | } else { |
| 915 | /* default values */ |
| 916 | switch(fe->ops->info.type) { |
| 917 | case FE_QPSK: |
| 918 | fepriv->min_delay = HZ/20; |
| 919 | fepriv->step_size = fepriv->parameters.u.qpsk.symbol_rate / 16000; |
| 920 | fepriv->max_drift = fepriv->parameters.u.qpsk.symbol_rate / 2000; |
| 921 | break; |
| 922 | |
| 923 | case FE_QAM: |
| 924 | fepriv->min_delay = HZ/20; |
| 925 | fepriv->step_size = 0; /* no zigzag */ |
| 926 | fepriv->max_drift = 0; |
| 927 | break; |
| 928 | |
| 929 | case FE_OFDM: |
| 930 | fepriv->min_delay = HZ/20; |
| 931 | fepriv->step_size = fe->ops->info.frequency_stepsize * 2; |
| 932 | fepriv->max_drift = (fe->ops->info.frequency_stepsize * 2) + 1; |
| 933 | break; |
| 934 | case FE_ATSC: |
| 935 | printk("dvb-core: FE_ATSC not handled yet.\n"); |
| 936 | break; |
| 937 | } |
| 938 | } |
| 939 | if (dvb_override_tune_delay > 0) |
| 940 | fepriv->min_delay = (dvb_override_tune_delay * HZ) / 1000; |
| 941 | |
| 942 | fepriv->state = FESTATE_RETUNE; |
| 943 | dvb_frontend_wakeup(fe); |
| 944 | dvb_frontend_add_event(fe, 0); |
| 945 | fepriv->status = 0; |
| 946 | err = 0; |
| 947 | break; |
| 948 | } |
| 949 | |
| 950 | case FE_GET_EVENT: |
| 951 | err = dvb_frontend_get_event (fe, parg, file->f_flags); |
| 952 | break; |
| 953 | |
| 954 | case FE_GET_FRONTEND: |
| 955 | if (fe->ops->get_frontend) { |
| 956 | memcpy (parg, &fepriv->parameters, sizeof (struct dvb_frontend_parameters)); |
| 957 | err = fe->ops->get_frontend(fe, (struct dvb_frontend_parameters*) parg); |
| 958 | } |
| 959 | break; |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 960 | |
| 961 | case FE_SET_FRONTEND_TUNE_MODE: |
Hans Verkuil | e18828e | 2006-01-09 15:25:28 -0200 | [diff] [blame] | 962 | fepriv->tune_mode_flags = (unsigned long) parg; |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 963 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | }; |
| 965 | |
| 966 | up (&fepriv->sem); |
| 967 | return err; |
| 968 | } |
| 969 | |
| 970 | static unsigned int dvb_frontend_poll(struct file *file, struct poll_table_struct *wait) |
| 971 | { |
| 972 | struct dvb_device *dvbdev = file->private_data; |
| 973 | struct dvb_frontend *fe = dvbdev->priv; |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 974 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | |
| 976 | dprintk ("%s\n", __FUNCTION__); |
| 977 | |
| 978 | poll_wait (file, &fepriv->events.wait_queue, wait); |
| 979 | |
| 980 | if (fepriv->events.eventw != fepriv->events.eventr) |
| 981 | return (POLLIN | POLLRDNORM | POLLPRI); |
| 982 | |
| 983 | return 0; |
| 984 | } |
| 985 | |
| 986 | static int dvb_frontend_open(struct inode *inode, struct file *file) |
| 987 | { |
| 988 | struct dvb_device *dvbdev = file->private_data; |
| 989 | struct dvb_frontend *fe = dvbdev->priv; |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 990 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | int ret; |
| 992 | |
| 993 | dprintk ("%s\n", __FUNCTION__); |
| 994 | |
| 995 | if ((ret = dvb_generic_open (inode, file)) < 0) |
| 996 | return ret; |
| 997 | |
| 998 | if ((file->f_flags & O_ACCMODE) != O_RDONLY) { |
| 999 | ret = dvb_frontend_start (fe); |
| 1000 | if (ret) |
| 1001 | dvb_generic_release (inode, file); |
| 1002 | |
| 1003 | /* empty event queue */ |
| 1004 | fepriv->events.eventr = fepriv->events.eventw = 0; |
Andrew de Quincey | 36cb557 | 2006-01-09 15:25:07 -0200 | [diff] [blame] | 1005 | |
| 1006 | /* normal tune mode when opened R/W */ |
| 1007 | fepriv->tune_mode_flags &= ~FE_TUNE_MODE_ONESHOT; |
Andrew de Quincey | 6445401 | 2006-04-06 14:32:23 -0300 | [diff] [blame] | 1008 | fepriv->tone = -1; |
| 1009 | fepriv->voltage = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | } |
| 1011 | |
| 1012 | return ret; |
| 1013 | } |
| 1014 | |
| 1015 | static int dvb_frontend_release(struct inode *inode, struct file *file) |
| 1016 | { |
| 1017 | struct dvb_device *dvbdev = file->private_data; |
| 1018 | struct dvb_frontend *fe = dvbdev->priv; |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1019 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
| 1021 | dprintk ("%s\n", __FUNCTION__); |
| 1022 | |
| 1023 | if ((file->f_flags & O_ACCMODE) != O_RDONLY) |
| 1024 | fepriv->release_jiffies = jiffies; |
| 1025 | |
| 1026 | return dvb_generic_release (inode, file); |
| 1027 | } |
| 1028 | |
| 1029 | static struct file_operations dvb_frontend_fops = { |
| 1030 | .owner = THIS_MODULE, |
| 1031 | .ioctl = dvb_generic_ioctl, |
| 1032 | .poll = dvb_frontend_poll, |
| 1033 | .open = dvb_frontend_open, |
| 1034 | .release = dvb_frontend_release |
| 1035 | }; |
| 1036 | |
| 1037 | int dvb_register_frontend(struct dvb_adapter* dvb, |
| 1038 | struct dvb_frontend* fe) |
| 1039 | { |
| 1040 | struct dvb_frontend_private *fepriv; |
| 1041 | static const struct dvb_device dvbdev_template = { |
| 1042 | .users = ~0, |
| 1043 | .writers = 1, |
| 1044 | .readers = (~0)-1, |
| 1045 | .fops = &dvb_frontend_fops, |
| 1046 | .kernel_ioctl = dvb_frontend_ioctl |
| 1047 | }; |
| 1048 | |
| 1049 | dprintk ("%s\n", __FUNCTION__); |
| 1050 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 1051 | if (mutex_lock_interruptible(&frontend_mutex)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | return -ERESTARTSYS; |
| 1053 | |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 1054 | fe->frontend_priv = kzalloc(sizeof(struct dvb_frontend_private), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | if (fe->frontend_priv == NULL) { |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 1056 | mutex_unlock(&frontend_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | return -ENOMEM; |
| 1058 | } |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1059 | fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | |
| 1061 | init_MUTEX (&fepriv->sem); |
| 1062 | init_waitqueue_head (&fepriv->wait_queue); |
| 1063 | init_waitqueue_head (&fepriv->events.wait_queue); |
| 1064 | init_MUTEX (&fepriv->events.sem); |
| 1065 | fe->dvb = dvb; |
| 1066 | fepriv->inversion = INVERSION_OFF; |
| 1067 | |
| 1068 | printk ("DVB: registering frontend %i (%s)...\n", |
| 1069 | fe->dvb->num, |
| 1070 | fe->ops->info.name); |
| 1071 | |
| 1072 | dvb_register_device (fe->dvb, &fepriv->dvbdev, &dvbdev_template, |
| 1073 | fe, DVB_DEVICE_FRONTEND); |
| 1074 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 1075 | mutex_unlock(&frontend_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | return 0; |
| 1077 | } |
| 1078 | EXPORT_SYMBOL(dvb_register_frontend); |
| 1079 | |
| 1080 | int dvb_unregister_frontend(struct dvb_frontend* fe) |
| 1081 | { |
Johannes Stezenbach | 0c53c70 | 2005-05-16 21:54:24 -0700 | [diff] [blame] | 1082 | struct dvb_frontend_private *fepriv = fe->frontend_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | dprintk ("%s\n", __FUNCTION__); |
| 1084 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 1085 | mutex_lock(&frontend_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | dvb_unregister_device (fepriv->dvbdev); |
| 1087 | dvb_frontend_stop (fe); |
| 1088 | if (fe->ops->release) |
| 1089 | fe->ops->release(fe); |
| 1090 | else |
| 1091 | printk("dvb_frontend: Demodulator (%s) does not have a release callback!\n", fe->ops->info.name); |
| 1092 | /* fe is invalid now */ |
| 1093 | kfree(fepriv); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 1094 | mutex_unlock(&frontend_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | return 0; |
| 1096 | } |
| 1097 | EXPORT_SYMBOL(dvb_unregister_frontend); |