xref: /openbmc/linux/drivers/media/pci/cx18/cx18-dvb.c (revision 17ae8136)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  cx18 functions for DVB support
4  *
5  *  Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
6  *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
7  */
8 
9 #include "cx18-version.h"
10 #include "cx18-dvb.h"
11 #include "cx18-io.h"
12 #include "cx18-queue.h"
13 #include "cx18-streams.h"
14 #include "cx18-cards.h"
15 #include "cx18-gpio.h"
16 #include "s5h1409.h"
17 #include "mxl5005s.h"
18 #include "s5h1411.h"
19 #include "tda18271.h"
20 #include "zl10353.h"
21 
22 #include <linux/firmware.h>
23 #include "mt352.h"
24 #include "mt352_priv.h"
25 #include "xc2028.h"
26 
27 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
28 
29 #define FWFILE "dvb-cx18-mpc718-mt352.fw"
30 
31 #define CX18_REG_DMUX_NUM_PORT_0_CONTROL 0xd5a000
32 #define CX18_CLOCK_ENABLE2		 0xc71024
33 #define CX18_DMUX_CLK_MASK		 0x0080
34 
35 /*
36  * CX18_CARD_HVR_1600_ESMT
37  * CX18_CARD_HVR_1600_SAMSUNG
38  */
39 
40 static struct mxl5005s_config hauppauge_hvr1600_tuner = {
41 	.i2c_address     = 0xC6 >> 1,
42 	.if_freq         = IF_FREQ_5380000HZ,
43 	.xtal_freq       = CRYSTAL_FREQ_16000000HZ,
44 	.agc_mode        = MXL_SINGLE_AGC,
45 	.tracking_filter = MXL_TF_C_H,
46 	.rssi_enable     = MXL_RSSI_ENABLE,
47 	.cap_select      = MXL_CAP_SEL_ENABLE,
48 	.div_out         = MXL_DIV_OUT_4,
49 	.clock_out       = MXL_CLOCK_OUT_DISABLE,
50 	.output_load     = MXL5005S_IF_OUTPUT_LOAD_200_OHM,
51 	.top		 = MXL5005S_TOP_25P2,
52 	.mod_mode        = MXL_DIGITAL_MODE,
53 	.if_mode         = MXL_ZERO_IF,
54 	.qam_gain        = 0x02,
55 	.AgcMasterByte   = 0x00,
56 };
57 
58 static struct s5h1409_config hauppauge_hvr1600_config = {
59 	.demod_address = 0x32 >> 1,
60 	.output_mode   = S5H1409_SERIAL_OUTPUT,
61 	.gpio          = S5H1409_GPIO_ON,
62 	.qam_if        = 44000,
63 	.inversion     = S5H1409_INVERSION_OFF,
64 	.status_mode   = S5H1409_DEMODLOCKING,
65 	.mpeg_timing   = S5H1409_MPEGTIMING_CONTINUOUS_NONINVERTING_CLOCK,
66 	.hvr1600_opt   = S5H1409_HVR1600_OPTIMIZE
67 };
68 
69 /*
70  * CX18_CARD_HVR_1600_S5H1411
71  */
72 static struct s5h1411_config hcw_s5h1411_config = {
73 	.output_mode   = S5H1411_SERIAL_OUTPUT,
74 	.gpio          = S5H1411_GPIO_OFF,
75 	.vsb_if        = S5H1411_IF_44000,
76 	.qam_if        = S5H1411_IF_4000,
77 	.inversion     = S5H1411_INVERSION_ON,
78 	.status_mode   = S5H1411_DEMODLOCKING,
79 	.mpeg_timing   = S5H1411_MPEGTIMING_CONTINUOUS_NONINVERTING_CLOCK,
80 };
81 
82 static struct tda18271_std_map hauppauge_tda18271_std_map = {
83 	.atsc_6   = { .if_freq = 5380, .agc_mode = 3, .std = 3,
84 		      .if_lvl = 6, .rfagc_top = 0x37 },
85 	.qam_6    = { .if_freq = 4000, .agc_mode = 3, .std = 0,
86 		      .if_lvl = 6, .rfagc_top = 0x37 },
87 };
88 
89 static struct tda18271_config hauppauge_tda18271_config = {
90 	.std_map = &hauppauge_tda18271_std_map,
91 	.gate    = TDA18271_GATE_DIGITAL,
92 	.output_opt = TDA18271_OUTPUT_LT_OFF,
93 };
94 
95 /*
96  * CX18_CARD_LEADTEK_DVR3100H
97  */
98 /* Information/confirmation of proper config values provided by Terry Wu */
99 static struct zl10353_config leadtek_dvr3100h_demod = {
100 	.demod_address         = 0x1e >> 1, /* Datasheet suggested straps */
101 	.if2                   = 45600,     /* 4.560 MHz IF from the XC3028 */
102 	.parallel_ts           = 1,         /* Not a serial TS */
103 	.no_tuner              = 1,         /* XC3028 is not behind the gate */
104 	.disable_i2c_gate_ctrl = 1,         /* Disable the I2C gate */
105 };
106 
107 /*
108  * CX18_CARD_YUAN_MPC718
109  */
110 /*
111  * Due to
112  *
113  * 1. an absence of information on how to program the MT352
114  * 2. the Linux mt352 module pushing MT352 initialization off onto us here
115  *
116  * We have to use an init sequence that *you* must extract from the Windows
117  * driver (yuanrap.sys) and which we load as a firmware.
118  *
119  * If someone can provide me with a Zarlink MT352 (Intel CE6352?) Design Manual
120  * with chip programming details, then I can remove this annoyance.
121  */
yuan_mpc718_mt352_reqfw(struct cx18_stream * stream,const struct firmware ** fw)122 static int yuan_mpc718_mt352_reqfw(struct cx18_stream *stream,
123 				   const struct firmware **fw)
124 {
125 	struct cx18 *cx = stream->cx;
126 	const char *fn = FWFILE;
127 	int ret;
128 
129 	ret = request_firmware(fw, fn, &cx->pci_dev->dev);
130 	if (ret)
131 		CX18_ERR("Unable to open firmware file %s\n", fn);
132 	else {
133 		size_t sz = (*fw)->size;
134 		if (sz < 2 || sz > 64 || (sz % 2) != 0) {
135 			CX18_ERR("Firmware %s has a bad size: %lu bytes\n",
136 				 fn, (unsigned long) sz);
137 			ret = -EILSEQ;
138 			release_firmware(*fw);
139 			*fw = NULL;
140 		}
141 	}
142 
143 	if (ret) {
144 		CX18_ERR("The MPC718 board variant with the MT352 DVB-T demodulator will not work without it\n");
145 		CX18_ERR("Run 'linux/scripts/get_dvb_firmware mpc718' if you need the firmware\n");
146 	}
147 	return ret;
148 }
149 
yuan_mpc718_mt352_init(struct dvb_frontend * fe)150 static int yuan_mpc718_mt352_init(struct dvb_frontend *fe)
151 {
152 	struct cx18_dvb *dvb = container_of(fe->dvb,
153 					    struct cx18_dvb, dvb_adapter);
154 	struct cx18_stream *stream = dvb->stream;
155 	const struct firmware *fw = NULL;
156 	int ret;
157 	int i;
158 	u8 buf[3];
159 
160 	ret = yuan_mpc718_mt352_reqfw(stream, &fw);
161 	if (ret)
162 		return ret;
163 
164 	/* Loop through all the register-value pairs in the firmware file */
165 	for (i = 0; i < fw->size; i += 2) {
166 		buf[0] = fw->data[i];
167 		/* Intercept a few registers we want to set ourselves */
168 		switch (buf[0]) {
169 		case TRL_NOMINAL_RATE_0:
170 			/* Set our custom OFDM bandwidth in the case below */
171 			break;
172 		case TRL_NOMINAL_RATE_1:
173 			/* 6 MHz: 64/7 * 6/8 / 20.48 * 2^16 = 0x55b6.db6 */
174 			/* 7 MHz: 64/7 * 7/8 / 20.48 * 2^16 = 0x6400 */
175 			/* 8 MHz: 64/7 * 8/8 / 20.48 * 2^16 = 0x7249.249 */
176 			buf[1] = 0x72;
177 			buf[2] = 0x49;
178 			mt352_write(fe, buf, 3);
179 			break;
180 		case INPUT_FREQ_0:
181 			/* Set our custom IF in the case below */
182 			break;
183 		case INPUT_FREQ_1:
184 			/* 4.56 MHz IF: (20.48 - 4.56)/20.48 * 2^14 = 0x31c0 */
185 			buf[1] = 0x31;
186 			buf[2] = 0xc0;
187 			mt352_write(fe, buf, 3);
188 			break;
189 		default:
190 			/* Pass through the register-value pair from the fw */
191 			buf[1] = fw->data[i+1];
192 			mt352_write(fe, buf, 2);
193 			break;
194 		}
195 	}
196 
197 	buf[0] = (u8) TUNER_GO;
198 	buf[1] = 0x01; /* Go */
199 	mt352_write(fe, buf, 2);
200 	release_firmware(fw);
201 	return 0;
202 }
203 
204 static struct mt352_config yuan_mpc718_mt352_demod = {
205 	.demod_address = 0x1e >> 1,
206 	.adc_clock     = 20480,     /* 20.480 MHz */
207 	.if2           =  4560,     /*  4.560 MHz */
208 	.no_tuner      = 1,         /* XC3028 is not behind the gate */
209 	.demod_init    = yuan_mpc718_mt352_init,
210 };
211 
212 static struct zl10353_config yuan_mpc718_zl10353_demod = {
213 	.demod_address         = 0x1e >> 1, /* Datasheet suggested straps */
214 	.if2                   = 45600,     /* 4.560 MHz IF from the XC3028 */
215 	.parallel_ts           = 1,         /* Not a serial TS */
216 	.no_tuner              = 1,         /* XC3028 is not behind the gate */
217 	.disable_i2c_gate_ctrl = 1,         /* Disable the I2C gate */
218 };
219 
220 static struct zl10353_config gotview_dvd3_zl10353_demod = {
221 	.demod_address         = 0x1e >> 1, /* Datasheet suggested straps */
222 	.if2                   = 45600,     /* 4.560 MHz IF from the XC3028 */
223 	.parallel_ts           = 1,         /* Not a serial TS */
224 	.no_tuner              = 1,         /* XC3028 is not behind the gate */
225 	.disable_i2c_gate_ctrl = 1,         /* Disable the I2C gate */
226 };
227 
228 static int dvb_register(struct cx18_stream *stream);
229 
230 /* Kernel DVB framework calls this when the feed needs to start.
231  * The CX18 framework should enable the transport DMA handling
232  * and queue processing.
233  */
cx18_dvb_start_feed(struct dvb_demux_feed * feed)234 static int cx18_dvb_start_feed(struct dvb_demux_feed *feed)
235 {
236 	struct dvb_demux *demux = feed->demux;
237 	struct cx18_stream *stream = demux->priv;
238 	struct cx18 *cx;
239 	int ret;
240 	u32 v;
241 
242 	if (!stream)
243 		return -EINVAL;
244 
245 	cx = stream->cx;
246 	CX18_DEBUG_INFO("Start feed: pid = 0x%x index = %d\n",
247 			feed->pid, feed->index);
248 
249 	mutex_lock(&cx->serialize_lock);
250 	ret = cx18_init_on_first_open(cx);
251 	mutex_unlock(&cx->serialize_lock);
252 	if (ret) {
253 		CX18_ERR("Failed to initialize firmware starting DVB feed\n");
254 		return ret;
255 	}
256 	ret = -EINVAL;
257 
258 	switch (cx->card->type) {
259 	case CX18_CARD_HVR_1600_ESMT:
260 	case CX18_CARD_HVR_1600_SAMSUNG:
261 	case CX18_CARD_HVR_1600_S5H1411:
262 		v = cx18_read_reg(cx, CX18_REG_DMUX_NUM_PORT_0_CONTROL);
263 		v |= 0x00400000; /* Serial Mode */
264 		v |= 0x00002000; /* Data Length - Byte */
265 		v |= 0x00010000; /* Error - Polarity */
266 		v |= 0x00020000; /* Error - Passthru */
267 		v |= 0x000c0000; /* Error - Ignore */
268 		cx18_write_reg(cx, v, CX18_REG_DMUX_NUM_PORT_0_CONTROL);
269 		break;
270 
271 	case CX18_CARD_LEADTEK_DVR3100H:
272 	case CX18_CARD_YUAN_MPC718:
273 	case CX18_CARD_GOTVIEW_PCI_DVD3:
274 	default:
275 		/* Assumption - Parallel transport - Signalling
276 		 * undefined or default.
277 		 */
278 		break;
279 	}
280 
281 	if (!demux->dmx.frontend)
282 		return -EINVAL;
283 
284 	mutex_lock(&stream->dvb->feedlock);
285 	if (stream->dvb->feeding++ == 0) {
286 		CX18_DEBUG_INFO("Starting Transport DMA\n");
287 		mutex_lock(&cx->serialize_lock);
288 		set_bit(CX18_F_S_STREAMING, &stream->s_flags);
289 		ret = cx18_start_v4l2_encode_stream(stream);
290 		if (ret < 0) {
291 			CX18_DEBUG_INFO("Failed to start Transport DMA\n");
292 			stream->dvb->feeding--;
293 			if (stream->dvb->feeding == 0)
294 				clear_bit(CX18_F_S_STREAMING, &stream->s_flags);
295 		}
296 		mutex_unlock(&cx->serialize_lock);
297 	} else
298 		ret = 0;
299 	mutex_unlock(&stream->dvb->feedlock);
300 
301 	return ret;
302 }
303 
304 /* Kernel DVB framework calls this when the feed needs to stop. */
cx18_dvb_stop_feed(struct dvb_demux_feed * feed)305 static int cx18_dvb_stop_feed(struct dvb_demux_feed *feed)
306 {
307 	struct dvb_demux *demux = feed->demux;
308 	struct cx18_stream *stream = demux->priv;
309 	struct cx18 *cx;
310 	int ret = -EINVAL;
311 
312 	if (stream) {
313 		cx = stream->cx;
314 		CX18_DEBUG_INFO("Stop feed: pid = 0x%x index = %d\n",
315 				feed->pid, feed->index);
316 
317 		mutex_lock(&stream->dvb->feedlock);
318 		if (--stream->dvb->feeding == 0) {
319 			CX18_DEBUG_INFO("Stopping Transport DMA\n");
320 			mutex_lock(&cx->serialize_lock);
321 			ret = cx18_stop_v4l2_encode_stream(stream, 0);
322 			mutex_unlock(&cx->serialize_lock);
323 		} else
324 			ret = 0;
325 		mutex_unlock(&stream->dvb->feedlock);
326 	}
327 
328 	return ret;
329 }
330 
cx18_dvb_register(struct cx18_stream * stream)331 int cx18_dvb_register(struct cx18_stream *stream)
332 {
333 	struct cx18 *cx = stream->cx;
334 	struct cx18_dvb *dvb = stream->dvb;
335 	struct dvb_adapter *dvb_adapter;
336 	struct dvb_demux *dvbdemux;
337 	struct dmx_demux *dmx;
338 	int ret;
339 
340 	if (!dvb)
341 		return -EINVAL;
342 
343 	dvb->enabled = 0;
344 	dvb->stream = stream;
345 
346 	ret = dvb_register_adapter(&dvb->dvb_adapter,
347 			CX18_DRIVER_NAME,
348 			THIS_MODULE, &cx->pci_dev->dev, adapter_nr);
349 	if (ret < 0)
350 		goto err_out;
351 
352 	dvb_adapter = &dvb->dvb_adapter;
353 
354 	dvbdemux = &dvb->demux;
355 
356 	dvbdemux->priv = (void *)stream;
357 
358 	dvbdemux->filternum = 256;
359 	dvbdemux->feednum = 256;
360 	dvbdemux->start_feed = cx18_dvb_start_feed;
361 	dvbdemux->stop_feed = cx18_dvb_stop_feed;
362 	dvbdemux->dmx.capabilities = (DMX_TS_FILTERING |
363 		DMX_SECTION_FILTERING | DMX_MEMORY_BASED_FILTERING);
364 	ret = dvb_dmx_init(dvbdemux);
365 	if (ret < 0)
366 		goto err_dvb_unregister_adapter;
367 
368 	dmx = &dvbdemux->dmx;
369 
370 	dvb->hw_frontend.source = DMX_FRONTEND_0;
371 	dvb->mem_frontend.source = DMX_MEMORY_FE;
372 	dvb->dmxdev.filternum = 256;
373 	dvb->dmxdev.demux = dmx;
374 
375 	ret = dvb_dmxdev_init(&dvb->dmxdev, dvb_adapter);
376 	if (ret < 0)
377 		goto err_dvb_dmx_release;
378 
379 	ret = dmx->add_frontend(dmx, &dvb->hw_frontend);
380 	if (ret < 0)
381 		goto err_dvb_dmxdev_release;
382 
383 	ret = dmx->add_frontend(dmx, &dvb->mem_frontend);
384 	if (ret < 0)
385 		goto err_remove_hw_frontend;
386 
387 	ret = dmx->connect_frontend(dmx, &dvb->hw_frontend);
388 	if (ret < 0)
389 		goto err_remove_mem_frontend;
390 
391 	ret = dvb_register(stream);
392 	if (ret < 0)
393 		goto err_disconnect_frontend;
394 
395 	dvb_net_init(dvb_adapter, &dvb->dvbnet, dmx);
396 
397 	CX18_INFO("DVB Frontend registered\n");
398 	CX18_INFO("Registered DVB adapter%d for %s (%d x %d.%02d kB)\n",
399 		  stream->dvb->dvb_adapter.num, stream->name,
400 		  stream->buffers, stream->buf_size/1024,
401 		  (stream->buf_size * 100 / 1024) % 100);
402 
403 	mutex_init(&dvb->feedlock);
404 	dvb->enabled = 1;
405 	return ret;
406 
407 err_disconnect_frontend:
408 	dmx->disconnect_frontend(dmx);
409 err_remove_mem_frontend:
410 	dmx->remove_frontend(dmx, &dvb->mem_frontend);
411 err_remove_hw_frontend:
412 	dmx->remove_frontend(dmx, &dvb->hw_frontend);
413 err_dvb_dmxdev_release:
414 	dvb_dmxdev_release(&dvb->dmxdev);
415 err_dvb_dmx_release:
416 	dvb_dmx_release(dvbdemux);
417 err_dvb_unregister_adapter:
418 	dvb_unregister_adapter(dvb_adapter);
419 err_out:
420 	return ret;
421 }
422 
cx18_dvb_unregister(struct cx18_stream * stream)423 void cx18_dvb_unregister(struct cx18_stream *stream)
424 {
425 	struct cx18 *cx = stream->cx;
426 	struct cx18_dvb *dvb = stream->dvb;
427 	struct dvb_adapter *dvb_adapter;
428 	struct dvb_demux *dvbdemux;
429 	struct dmx_demux *dmx;
430 
431 	CX18_INFO("unregister DVB\n");
432 
433 	if (dvb == NULL || !dvb->enabled)
434 		return;
435 
436 	dvb_adapter = &dvb->dvb_adapter;
437 	dvbdemux = &dvb->demux;
438 	dmx = &dvbdemux->dmx;
439 
440 	dmx->close(dmx);
441 	dvb_net_release(&dvb->dvbnet);
442 	dmx->remove_frontend(dmx, &dvb->mem_frontend);
443 	dmx->remove_frontend(dmx, &dvb->hw_frontend);
444 	dvb_dmxdev_release(&dvb->dmxdev);
445 	dvb_dmx_release(dvbdemux);
446 	dvb_unregister_frontend(dvb->fe);
447 	dvb_frontend_detach(dvb->fe);
448 	dvb_unregister_adapter(dvb_adapter);
449 }
450 
451 /* All the DVB attach calls go here, this function gets modified
452  * for each new card. cx18_dvb_start_feed() will also need changes.
453  */
dvb_register(struct cx18_stream * stream)454 static int dvb_register(struct cx18_stream *stream)
455 {
456 	struct cx18_dvb *dvb = stream->dvb;
457 	struct cx18 *cx = stream->cx;
458 	int ret = 0;
459 
460 	switch (cx->card->type) {
461 	case CX18_CARD_HVR_1600_ESMT:
462 	case CX18_CARD_HVR_1600_SAMSUNG:
463 		dvb->fe = dvb_attach(s5h1409_attach,
464 			&hauppauge_hvr1600_config,
465 			&cx->i2c_adap[0]);
466 		if (dvb->fe != NULL) {
467 			dvb_attach(mxl5005s_attach, dvb->fe,
468 				&cx->i2c_adap[0],
469 				&hauppauge_hvr1600_tuner);
470 			ret = 0;
471 		}
472 		break;
473 	case CX18_CARD_HVR_1600_S5H1411:
474 		dvb->fe = dvb_attach(s5h1411_attach,
475 				     &hcw_s5h1411_config,
476 				     &cx->i2c_adap[0]);
477 		if (dvb->fe != NULL)
478 			dvb_attach(tda18271_attach, dvb->fe,
479 				   0x60, &cx->i2c_adap[0],
480 				   &hauppauge_tda18271_config);
481 		break;
482 	case CX18_CARD_LEADTEK_DVR3100H:
483 		dvb->fe = dvb_attach(zl10353_attach,
484 				     &leadtek_dvr3100h_demod,
485 				     &cx->i2c_adap[1]);
486 		if (dvb->fe != NULL) {
487 			struct dvb_frontend *fe;
488 			struct xc2028_config cfg = {
489 				.i2c_adap = &cx->i2c_adap[1],
490 				.i2c_addr = 0xc2 >> 1,
491 				.ctrl = NULL,
492 			};
493 			static struct xc2028_ctrl ctrl = {
494 				.fname   = XC2028_DEFAULT_FIRMWARE,
495 				.max_len = 64,
496 				.demod   = XC3028_FE_ZARLINK456,
497 				.type    = XC2028_AUTO,
498 			};
499 
500 			fe = dvb_attach(xc2028_attach, dvb->fe, &cfg);
501 			if (fe != NULL && fe->ops.tuner_ops.set_config != NULL)
502 				fe->ops.tuner_ops.set_config(fe, &ctrl);
503 		}
504 		break;
505 	case CX18_CARD_YUAN_MPC718:
506 		/*
507 		 * TODO
508 		 * Apparently, these cards also could instead have a
509 		 * DiBcom demod supported by one of the db7000 drivers
510 		 */
511 		dvb->fe = dvb_attach(mt352_attach,
512 				     &yuan_mpc718_mt352_demod,
513 				     &cx->i2c_adap[1]);
514 		if (dvb->fe == NULL)
515 			dvb->fe = dvb_attach(zl10353_attach,
516 					     &yuan_mpc718_zl10353_demod,
517 					     &cx->i2c_adap[1]);
518 		if (dvb->fe != NULL) {
519 			struct dvb_frontend *fe;
520 			struct xc2028_config cfg = {
521 				.i2c_adap = &cx->i2c_adap[1],
522 				.i2c_addr = 0xc2 >> 1,
523 				.ctrl = NULL,
524 			};
525 			static struct xc2028_ctrl ctrl = {
526 				.fname   = XC2028_DEFAULT_FIRMWARE,
527 				.max_len = 64,
528 				.demod   = XC3028_FE_ZARLINK456,
529 				.type    = XC2028_AUTO,
530 			};
531 
532 			fe = dvb_attach(xc2028_attach, dvb->fe, &cfg);
533 			if (fe != NULL && fe->ops.tuner_ops.set_config != NULL)
534 				fe->ops.tuner_ops.set_config(fe, &ctrl);
535 		}
536 		break;
537 	case CX18_CARD_GOTVIEW_PCI_DVD3:
538 			dvb->fe = dvb_attach(zl10353_attach,
539 					     &gotview_dvd3_zl10353_demod,
540 					     &cx->i2c_adap[1]);
541 		if (dvb->fe != NULL) {
542 			struct dvb_frontend *fe;
543 			struct xc2028_config cfg = {
544 				.i2c_adap = &cx->i2c_adap[1],
545 				.i2c_addr = 0xc2 >> 1,
546 				.ctrl = NULL,
547 			};
548 			static struct xc2028_ctrl ctrl = {
549 				.fname   = XC2028_DEFAULT_FIRMWARE,
550 				.max_len = 64,
551 				.demod   = XC3028_FE_ZARLINK456,
552 				.type    = XC2028_AUTO,
553 			};
554 
555 			fe = dvb_attach(xc2028_attach, dvb->fe, &cfg);
556 			if (fe != NULL && fe->ops.tuner_ops.set_config != NULL)
557 				fe->ops.tuner_ops.set_config(fe, &ctrl);
558 		}
559 		break;
560 	default:
561 		/* No Digital Tv Support */
562 		break;
563 	}
564 
565 	if (dvb->fe == NULL) {
566 		CX18_ERR("frontend initialization failed\n");
567 		return -1;
568 	}
569 
570 	dvb->fe->callback = cx18_reset_tuner_gpio;
571 
572 	ret = dvb_register_frontend(&dvb->dvb_adapter, dvb->fe);
573 	if (ret < 0) {
574 		if (dvb->fe->ops.release)
575 			dvb->fe->ops.release(dvb->fe);
576 		return ret;
577 	}
578 
579 	/*
580 	 * The firmware seems to enable the TS DMUX clock
581 	 * under various circumstances.  However, since we know we
582 	 * might use it, let's just turn it on ourselves here.
583 	 */
584 	cx18_write_reg_expect(cx,
585 			      (CX18_DMUX_CLK_MASK << 16) | CX18_DMUX_CLK_MASK,
586 			      CX18_CLOCK_ENABLE2,
587 			      CX18_DMUX_CLK_MASK,
588 			      (CX18_DMUX_CLK_MASK << 16) | CX18_DMUX_CLK_MASK);
589 
590 	return ret;
591 }
592 
593 MODULE_FIRMWARE(FWFILE);
594