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2024-01-03 2f7c68cb55ecb7331f2381deb497c27155f32faf 
 kernel/drivers/media/usb/dvb-usb-v2/lmedm04.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /* DVB USB compliant linux driver for
23  *
34  * DM04/QQBOX DVB-S USB BOX	LME2510C + SHARP:BS2F7HZ7395
....@@ -21,7 +22,7 @@
2122  *
2223  * LME2510C + M88RS2000
2324  *
24
- * For firmware see Documentation/media/dvb-drivers/lmedm04.rst
25
+ * For firmware see Documentation/admin-guide/media/lmedm04.rst
2526  *
2627  * I2C addresses:
2728  * 0xd0 - STV0288	- Demodulator
....@@ -33,23 +34,12 @@
3334  * 0xd0 - STV0299	- Demodulator
3435  * 0xc0 - IX2410	- Tuner
3536  *
36
- *
3737  * VID = 3344  PID LME2510=1122 LME2510C=1120
3838  *
3939  * Copyright (C) 2010 Malcolm Priestley (tvboxspy@gmail.com)
4040  * LME2510(C)(C) Leaguerme (Shenzhen) MicroElectronics Co., Ltd.
4141  *
42
- * This program is free software; you can redistribute it and/or modify
43
- * it under the terms of the GNU General Public License Version 2, as
44
- * published by the Free Software Foundation.
45
- *
46
- * This program is distributed in the hope that it will be useful,
47
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
48
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
49
- * GNU General Public License for more details.
50
- *
51
- *
52
- * see Documentation/media/dvb-drivers/dvb-usb.rst for more information
42
+ * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
5343  *
5444  * Known Issues :
5545  *	LME2510: Non Intel USB chipsets fail to maintain High Speed on
....@@ -134,9 +124,9 @@
134124 	u8 stream_on;
135125 	u8 pid_size;
136126 	u8 pid_off;
137
-	void *buffer;
127
+	u8 int_buffer[128];
138128 	struct urb *lme_urb;
139
-	void *usb_buffer;
129
+	u8 usb_buffer[64];
140130 	/* Frontend original calls */
141131 	int (*fe_read_status)(struct dvb_frontend *, enum fe_status *);
142132 	int (*fe_read_signal_strength)(struct dvb_frontend *, u16 *);
....@@ -147,59 +137,30 @@
147137 	u8 dvb_usb_lme2510_firmware;
148138 };
149139 
150
-static int lme2510_bulk_write(struct usb_device *dev,
151
-				u8 *snd, int len, u8 pipe)
152
-{
153
-	int actual_l;
154
-
155
-	return usb_bulk_msg(dev, usb_sndbulkpipe(dev, pipe),
156
-			    snd, len, &actual_l, 100);
157
-}
158
-
159
-static int lme2510_bulk_read(struct usb_device *dev,
160
-				u8 *rev, int len, u8 pipe)
161
-{
162
-	int actual_l;
163
-
164
-	return usb_bulk_msg(dev, usb_rcvbulkpipe(dev, pipe),
165
-			    rev, len, &actual_l, 200);
166
-}
167
-
168140 static int lme2510_usb_talk(struct dvb_usb_device *d,
169
-		u8 *wbuf, int wlen, u8 *rbuf, int rlen)
141
+			    u8 *wbuf, int wlen, u8 *rbuf, int rlen)
170142 {
171143 	struct lme2510_state *st = d->priv;
172
-	u8 *buff;
173144 	int ret = 0;
174145 
175
-	if (st->usb_buffer == NULL) {
176
-		st->usb_buffer = kmalloc(64, GFP_KERNEL);
177
-		if (st->usb_buffer == NULL) {
178
-			info("MEM Error no memory");
179
-			return -ENOMEM;
180
-		}
181
-	}
182
-	buff = st->usb_buffer;
146
+	if (max(wlen, rlen) > sizeof(st->usb_buffer))
147
+		return -EINVAL;
183148 
184149 	ret = mutex_lock_interruptible(&d->usb_mutex);
185
-
186150 	if (ret < 0)
187151 		return -EAGAIN;
188152 
189
-	/* the read/write capped at 64 */
190
-	memcpy(buff, wbuf, (wlen < 64) ? wlen : 64);
153
+	memcpy(st->usb_buffer, wbuf, wlen);
191154 
192
-	ret |= lme2510_bulk_write(d->udev, buff, wlen , 0x01);
155
+	ret = dvb_usbv2_generic_rw_locked(d, st->usb_buffer, wlen,
156
+					  st->usb_buffer, rlen);
193157 
194
-	ret |= lme2510_bulk_read(d->udev, buff, (rlen < 64) ?
195
-			rlen : 64 , 0x01);
196
-
197
-	if (rlen > 0)
198
-		memcpy(rbuf, buff, rlen);
158
+	if (rlen)
159
+		memcpy(rbuf, st->usb_buffer, rlen);
199160 
200161 	mutex_unlock(&d->usb_mutex);
201162 
202
-	return (ret < 0) ? -ENODEV : 0;
163
+	return ret;
203164 }
204165 
205166 static int lme2510_stream_restart(struct dvb_usb_device *d)
....@@ -337,7 +298,7 @@
337298 
338299 		switch (ibuf[0]) {
339300 		case 0xaa:
340
-			debug_data_snipet(1, "INT Remote data snipet", ibuf);
301
+			debug_data_snipet(1, "INT Remote data snippet", ibuf);
341302 			if (!adap_to_d(adap)->rc_dev)
342303 				break;
343304 
....@@ -387,13 +348,13 @@
387348 
388349 			lme2510_update_stats(adap);
389350 
390
-			debug_data_snipet(5, "INT Remote data snipet in", ibuf);
351
+			debug_data_snipet(5, "INT Remote data snippet in", ibuf);
391352 		break;
392353 		case 0xcc:
393
-			debug_data_snipet(1, "INT Control data snipet", ibuf);
354
+			debug_data_snipet(1, "INT Control data snippet", ibuf);
394355 			break;
395356 		default:
396
-			debug_data_snipet(1, "INT Unknown data snipet", ibuf);
357
+			debug_data_snipet(1, "INT Unknown data snippet", ibuf);
397358 		break;
398359 		}
399360 	}
....@@ -417,28 +378,20 @@
417378 	if (lme_int->lme_urb == NULL)
418379 			return -ENOMEM;
419380 
420
-	lme_int->buffer = usb_alloc_coherent(d->udev, 128, GFP_ATOMIC,
421
-					&lme_int->lme_urb->transfer_dma);
422
-
423
-	if (lme_int->buffer == NULL)
424
-			return -ENOMEM;
425
-
426381 	usb_fill_int_urb(lme_int->lme_urb,
427
-				d->udev,
428
-				usb_rcvintpipe(d->udev, 0xa),
429
-				lme_int->buffer,
430
-				128,
431
-				lme2510_int_response,
432
-				adap,
433
-				8);
382
+			 d->udev,
383
+			 usb_rcvintpipe(d->udev, 0xa),
384
+			 lme_int->int_buffer,
385
+			 sizeof(lme_int->int_buffer),
386
+			 lme2510_int_response,
387
+			 adap,
388
+			 8);
434389 
435390 	/* Quirk of pipe reporting PIPE_BULK but behaves as interrupt */
436391 	ep = usb_pipe_endpoint(d->udev, lme_int->lme_urb->pipe);
437392 
438393 	if (usb_endpoint_type(&ep->desc) == USB_ENDPOINT_XFER_BULK)
439394 		lme_int->lme_urb->pipe = usb_rcvbulkpipe(d->udev, 0xa);
440
-
441
-	lme_int->lme_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
442395 
443396 	usb_submit_urb(lme_int->lme_urb, GFP_ATOMIC);
444397 	info("INT Interrupt Service Started");
....@@ -533,12 +486,9 @@
533486 	static u8 obuf[64], ibuf[64];
534487 	int i, read, read_o;
535488 	u16 len;
536
-	u8 gate = st->i2c_gate;
489
+	u8 gate;
537490 
538491 	mutex_lock(&d->i2c_mutex);
539
-
540
-	if (gate == 0)
541
-		gate = 5;
542492 
543493 	for (i = 0; i < num; i++) {
544494 		read_o = msg[i].flags & I2C_M_RD;
....@@ -737,7 +687,7 @@
737687 				cold = 0;
738688 				break;
739689 			}
740
-			/* fall through */
690
+			fallthrough;
741691 		case TUNER_LG:
742692 			fw_lme = fw_lg;
743693 			ret = request_firmware(&fw, fw_lme, &udev->dev);
....@@ -760,7 +710,7 @@
760710 				cold = 0;
761711 				break;
762712 			}
763
-			/* fall through */
713
+			fallthrough;
764714 		case TUNER_LG:
765715 			fw_lme = fw_c_lg;
766716 			ret = request_firmware(&fw, fw_lme, &udev->dev);
....@@ -768,7 +718,7 @@
768718 				st->dvb_usb_lme2510_firmware = TUNER_LG;
769719 				break;
770720 			}
771
-			/* fall through */
721
+			fallthrough;
772722 		case TUNER_S0194:
773723 			fw_lme = fw_c_s0194;
774724 			ret = request_firmware(&fw, fw_lme, &udev->dev);
....@@ -1004,7 +954,7 @@
1004954 		" SHARP:BS2F7HZ0194", " RS2000"};
1005955 	char *name = adap->fe[0]->ops.info.name;
1006956 
1007
-	strlcpy(name, desc, 128);
957
+	strscpy(name, desc, 128);
1008958 	strlcat(name, fe_name[st->tuner_config], 128);
1009959 
1010960 	return 0;
....@@ -1068,7 +1018,7 @@
10681018 			}
10691019 			break;
10701020 		}
1071
-		/* fall through */
1021
+		fallthrough;
10721022 	case 0x22f0:
10731023 		st->i2c_gate = 5;
10741024 		adap->fe[0] = dvb_attach(m88rs2000_attach,
....@@ -1245,40 +1195,19 @@
12451195 	return 0;
12461196 }
12471197 
1248
-static void *lme2510_exit_int(struct dvb_usb_device *d)
1198
+static void lme2510_exit(struct dvb_usb_device *d)
12491199 {
12501200 	struct lme2510_state *st = d->priv;
12511201 	struct dvb_usb_adapter *adap = &d->adapter[0];
1252
-	void *buffer = NULL;
12531202 
12541203 	if (adap != NULL) {
12551204 		lme2510_kill_urb(&adap->stream);
12561205 	}
12571206 
1258
-	if (st->usb_buffer != NULL) {
1259
-		st->i2c_talk_onoff = 1;
1260
-		st->signal_level = 0;
1261
-		st->signal_sn = 0;
1262
-		buffer = st->usb_buffer;
1263
-	}
1264
-
1265
-	if (st->lme_urb != NULL) {
1207
+	if (st->lme_urb) {
12661208 		usb_kill_urb(st->lme_urb);
1267
-		usb_free_coherent(d->udev, 128, st->buffer,
1268
-				  st->lme_urb->transfer_dma);
1209
+		usb_free_urb(st->lme_urb);
12691210 		info("Interrupt Service Stopped");
1270
-	}
1271
-
1272
-	return buffer;
1273
-}
1274
-
1275
-static void lme2510_exit(struct dvb_usb_device *d)
1276
-{
1277
-	void *usb_buffer;
1278
-
1279
-	if (d != NULL) {
1280
-		usb_buffer = lme2510_exit_int(d);
1281
-		kfree(usb_buffer);
12821211 	}
12831212 }
12841213 
....@@ -1288,6 +1217,8 @@
12881217 	.bInterfaceNumber = 0,
12891218 	.adapter_nr = adapter_nr,
12901219 	.size_of_priv = sizeof(struct lme2510_state),
1220
+	.generic_bulk_ctrl_endpoint = 0x01,
1221
+	.generic_bulk_ctrl_endpoint_response = 0x01,
12911222 
12921223 	.download_firmware = lme2510_download_firmware,
12931224