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2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f 
 kernel/drivers/media/dvb-core/dvb_frontend.c
....@@ -1,6 +1,6 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * dvb_frontend.c: DVB frontend tuning interface/thread
3
- *
44  *
55  * Copyright (C) 1999-2001 Ralph  Metzler
66  *			   Marcus Metzler
....@@ -8,18 +8,6 @@
88  *				      for convergence integrated media GmbH
99  *
1010  * 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
- * To obtain the license, point your browser to
22
- * http://www.gnu.org/copyleft/gpl.html
2311  */
2412 
2513 /* Enables DVBv3 compatibility bits at the headers */
....@@ -920,6 +908,9 @@
920908 			 "DVB: adapter %i frontend %u frequency limits undefined - fix the driver\n",
921909 			 fe->dvb->num, fe->id);
922910 
911
+	dev_dbg(fe->dvb->device, "frequency interval: tuner: %u...%u, frontend: %u...%u",
912
+		tuner_min, tuner_max, frontend_min, frontend_max);
913
+
923914 	/* If the standard is for satellite, convert frequencies to kHz */
924915 	switch (c->delivery_system) {
925916 	case SYS_DVBS:
....@@ -1596,7 +1587,7 @@
15961587  *
15971588  * Provides emulation for delivery systems that are compatible with the old
15981589  * DVBv3 call. Among its usages, it provices support for ISDB-T, and allows
1599
- * using a DVB-S2 only frontend just like it were a DVB-S, if the frontent
1590
+ * using a DVB-S2 only frontend just like it were a DVB-S, if the frontend
16001591  * parameters are compatible with DVB-S spec.
16011592  */
16021593 static int emulate_delivery_system(struct dvb_frontend *fe, u32 delsys)
....@@ -2323,6 +2314,78 @@
23232314 	return 0;
23242315 }
23252316 
2317
+static int dvb_get_property(struct dvb_frontend *fe, struct file *file,
2318
+			    struct dtv_properties *tvps)
2319
+{
2320
+	struct dvb_frontend_private *fepriv = fe->frontend_priv;
2321
+	struct dtv_property *tvp = NULL;
2322
+	struct dtv_frontend_properties getp;
2323
+	int i, err;
2324
+
2325
+	memcpy(&getp, &fe->dtv_property_cache, sizeof(getp));
2326
+
2327
+	dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2328
+		__func__, tvps->num);
2329
+	dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2330
+		__func__, tvps->props);
2331
+
2332
+	/*
2333
+	 * Put an arbitrary limit on the number of messages that can
2334
+	 * be sent at once
2335
+	 */
2336
+	if (!tvps->num || tvps->num > DTV_IOCTL_MAX_MSGS)
2337
+		return -EINVAL;
2338
+
2339
+	tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
2340
+	if (IS_ERR(tvp))
2341
+		return PTR_ERR(tvp);
2342
+
2343
+	/*
2344
+	 * Let's use our own copy of property cache, in order to
2345
+	 * avoid mangling with DTV zigzag logic, as drivers might
2346
+	 * return crap, if they don't check if the data is available
2347
+	 * before updating the properties cache.
2348
+	 */
2349
+	if (fepriv->state != FESTATE_IDLE) {
2350
+		err = dtv_get_frontend(fe, &getp, NULL);
2351
+		if (err < 0)
2352
+			goto out;
2353
+	}
2354
+	for (i = 0; i < tvps->num; i++) {
2355
+		err = dtv_property_process_get(fe, &getp,
2356
+					       tvp + i, file);
2357
+		if (err < 0)
2358
+			goto out;
2359
+	}
2360
+
2361
+	if (copy_to_user((void __user *)tvps->props, tvp,
2362
+			 tvps->num * sizeof(struct dtv_property))) {
2363
+		err = -EFAULT;
2364
+		goto out;
2365
+	}
2366
+
2367
+	err = 0;
2368
+out:
2369
+	kfree(tvp);
2370
+	return err;
2371
+}
2372
+
2373
+static int dvb_get_frontend(struct dvb_frontend *fe,
2374
+			    struct dvb_frontend_parameters *p_out)
2375
+{
2376
+	struct dtv_frontend_properties getp;
2377
+
2378
+	/*
2379
+	 * Let's use our own copy of property cache, in order to
2380
+	 * avoid mangling with DTV zigzag logic, as drivers might
2381
+	 * return crap, if they don't check if the data is available
2382
+	 * before updating the properties cache.
2383
+	 */
2384
+	memcpy(&getp, &fe->dtv_property_cache, sizeof(getp));
2385
+
2386
+	return dtv_get_frontend(fe, &getp, p_out);
2387
+}
2388
+
23262389 static int dvb_frontend_handle_ioctl(struct file *file,
23272390 				     unsigned int cmd, void *parg)
23282391 {
....@@ -2368,64 +2431,15 @@
23682431 		err = 0;
23692432 		break;
23702433 	}
2371
-	case FE_GET_PROPERTY: {
2372
-		struct dtv_properties *tvps = parg;
2373
-		struct dtv_property *tvp = NULL;
2374
-		struct dtv_frontend_properties getp = fe->dtv_property_cache;
2375
-
2376
-		dev_dbg(fe->dvb->device, "%s: properties.num = %d\n",
2377
-			__func__, tvps->num);
2378
-		dev_dbg(fe->dvb->device, "%s: properties.props = %p\n",
2379
-			__func__, tvps->props);
2380
-
2381
-		/*
2382
-		 * Put an arbitrary limit on the number of messages that can
2383
-		 * be sent at once
2384
-		 */
2385
-		if (!tvps->num || (tvps->num > DTV_IOCTL_MAX_MSGS))
2386
-			return -EINVAL;
2387
-
2388
-		tvp = memdup_user((void __user *)tvps->props, tvps->num * sizeof(*tvp));
2389
-		if (IS_ERR(tvp))
2390
-			return PTR_ERR(tvp);
2391
-
2392
-		/*
2393
-		 * Let's use our own copy of property cache, in order to
2394
-		 * avoid mangling with DTV zigzag logic, as drivers might
2395
-		 * return crap, if they don't check if the data is available
2396
-		 * before updating the properties cache.
2397
-		 */
2398
-		if (fepriv->state != FESTATE_IDLE) {
2399
-			err = dtv_get_frontend(fe, &getp, NULL);
2400
-			if (err < 0) {
2401
-				kfree(tvp);
2402
-				return err;
2403
-			}
2404
-		}
2405
-		for (i = 0; i < tvps->num; i++) {
2406
-			err = dtv_property_process_get(fe, &getp,
2407
-						       tvp + i, file);
2408
-			if (err < 0) {
2409
-				kfree(tvp);
2410
-				return err;
2411
-			}
2412
-		}
2413
-
2414
-		if (copy_to_user((void __user *)tvps->props, tvp,
2415
-				 tvps->num * sizeof(struct dtv_property))) {
2416
-			kfree(tvp);
2417
-			return -EFAULT;
2418
-		}
2419
-		kfree(tvp);
2420
-		err = 0;
2434
+	case FE_GET_PROPERTY:
2435
+		err = dvb_get_property(fe, file, parg);
24212436 		break;
2422
-	}
24232437 
24242438 	case FE_GET_INFO: {
24252439 		struct dvb_frontend_info *info = parg;
24262440 		memset(info, 0, sizeof(*info));
24272441 
2428
-		strcpy(info->name, fe->ops.info.name);
2442
+		strscpy(info->name, fe->ops.info.name, sizeof(info->name));
24292443 		info->symbol_rate_min = fe->ops.info.symbol_rate_min;
24302444 		info->symbol_rate_max = fe->ops.info.symbol_rate_max;
24312445 		info->symbol_rate_tolerance = fe->ops.info.symbol_rate_tolerance;
....@@ -2557,7 +2571,6 @@
25572571 		fepriv->tune_mode_flags = (unsigned long)parg;
25582572 		err = 0;
25592573 		break;
2560
-
25612574 	/* DEPRECATED dish control ioctls */
25622575 
25632576 	case FE_DISHNETWORK_SEND_LEGACY_CMD:
....@@ -2590,8 +2603,8 @@
25902603 			u8 last = 1;
25912604 
25922605 			if (dvb_frontend_debug)
2593
-				dprintk("%s switch command: 0x%04lx\n",
2594
-					__func__, swcmd);
2606
+				dprintk("switch command: 0x%04lx\n",
2607
+					swcmd);
25952608 			nexttime = ktime_get_boottime();
25962609 			if (dvb_frontend_debug)
25972610 				tv[0] = nexttime;
....@@ -2614,8 +2627,8 @@
26142627 					dvb_frontend_sleep_until(&nexttime, 8000);
26152628 			}
26162629 			if (dvb_frontend_debug) {
2617
-				dprintk("%s(%d): switch delay (should be 32k followed by all 8k)\n",
2618
-					__func__, fe->dvb->num);
2630
+				dprintk("(adapter %d): switch delay (should be 32k followed by all 8k)\n",
2631
+					fe->dvb->num);
26192632 				for (i = 1; i < 10; i++)
26202633 					pr_info("%d: %d\n", i,
26212634 						(int)ktime_us_delta(tv[i], tv[i - 1]));
....@@ -2676,22 +2689,14 @@
26762689 			break;
26772690 		err = dtv_set_frontend(fe);
26782691 		break;
2692
+
26792693 	case FE_GET_EVENT:
26802694 		err = dvb_frontend_get_event(fe, parg, file->f_flags);
26812695 		break;
26822696 
2683
-	case FE_GET_FRONTEND: {
2684
-		struct dtv_frontend_properties getp = fe->dtv_property_cache;
2685
-
2686
-		/*
2687
-		 * Let's use our own copy of property cache, in order to
2688
-		 * avoid mangling with DTV zigzag logic, as drivers might
2689
-		 * return crap, if they don't check if the data is available
2690
-		 * before updating the properties cache.
2691
-		 */
2692
-		err = dtv_get_frontend(fe, &getp, parg);
2697
+	case FE_GET_FRONTEND:
2698
+		err = dvb_get_frontend(fe, parg);
26932699 		break;
2694
-	}
26952700 
26962701 	default:
26972702 		return -ENOTSUPP;