1 /*
2 	STB6100 Silicon Tuner
3 	Copyright (C) Manu Abraham (abraham.manu@gmail.com)
4 
5 	Copyright (C) ST Microelectronics
6 
7 	This program is free software; you can redistribute it and/or modify
8 	it under the terms of the GNU General Public License as published by
9 	the Free Software Foundation; either version 2 of the License, or
10 	(at your option) any later version.
11 
12 	This program is distributed in the hope that it will be useful,
13 	but WITHOUT ANY WARRANTY; without even the implied warranty of
14 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 	GNU General Public License for more details.
16 
17 	You should have received a copy of the GNU General Public License
18 	along with this program; if not, write to the Free Software
19 	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21 
22 #include <linux/init.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/slab.h>
26 #include <linux/string.h>
27 
28 #include <media/dvb_frontend.h>
29 #include "stb6100.h"
30 
31 static unsigned int verbose;
32 module_param(verbose, int, 0644);
33 
34 /* Max transfer size done by I2C transfer functions */
35 #define MAX_XFER_SIZE  64
36 
37 #define FE_ERROR		0
38 #define FE_NOTICE		1
39 #define FE_INFO			2
40 #define FE_DEBUG		3
41 
42 #define dprintk(x, y, z, format, arg...) do {						\
43 	if (z) {									\
44 		if	((x > FE_ERROR) && (x > y))					\
45 			printk(KERN_ERR "%s: " format "\n", __func__ , ##arg);		\
46 		else if	((x > FE_NOTICE) && (x > y))					\
47 			printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg);	\
48 		else if ((x > FE_INFO) && (x > y))					\
49 			printk(KERN_INFO "%s: " format "\n", __func__ , ##arg);		\
50 		else if ((x > FE_DEBUG) && (x > y))					\
51 			printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg);	\
52 	} else {									\
53 		if (x > y)								\
54 			printk(format, ##arg);						\
55 	}										\
56 } while (0)
57 
58 struct stb6100_lkup {
59 	u32 val_low;
60 	u32 val_high;
61 	u8   reg;
62 };
63 
64 static void stb6100_release(struct dvb_frontend *fe);
65 
66 static const struct stb6100_lkup lkup[] = {
67 	{       0,  950000, 0x0a },
68 	{  950000, 1000000, 0x0a },
69 	{ 1000000, 1075000, 0x0c },
70 	{ 1075000, 1200000, 0x00 },
71 	{ 1200000, 1300000, 0x01 },
72 	{ 1300000, 1370000, 0x02 },
73 	{ 1370000, 1470000, 0x04 },
74 	{ 1470000, 1530000, 0x05 },
75 	{ 1530000, 1650000, 0x06 },
76 	{ 1650000, 1800000, 0x08 },
77 	{ 1800000, 1950000, 0x0a },
78 	{ 1950000, 2150000, 0x0c },
79 	{ 2150000, 9999999, 0x0c },
80 	{       0,       0, 0x00 }
81 };
82 
83 /* Register names for easy debugging.	*/
84 static const char *stb6100_regnames[] = {
85 	[STB6100_LD]		= "LD",
86 	[STB6100_VCO]		= "VCO",
87 	[STB6100_NI]		= "NI",
88 	[STB6100_NF_LSB]	= "NF",
89 	[STB6100_K]		= "K",
90 	[STB6100_G]		= "G",
91 	[STB6100_F]		= "F",
92 	[STB6100_DLB]		= "DLB",
93 	[STB6100_TEST1]		= "TEST1",
94 	[STB6100_FCCK]		= "FCCK",
95 	[STB6100_LPEN]		= "LPEN",
96 	[STB6100_TEST3]		= "TEST3",
97 };
98 
99 /* Template for normalisation, i.e. setting unused or undocumented
100  * bits as required according to the documentation.
101  */
102 struct stb6100_regmask {
103 	u8 mask;
104 	u8 set;
105 };
106 
107 static const struct stb6100_regmask stb6100_template[] = {
108 	[STB6100_LD]		= { 0xff, 0x00 },
109 	[STB6100_VCO]		= { 0xff, 0x00 },
110 	[STB6100_NI]		= { 0xff, 0x00 },
111 	[STB6100_NF_LSB]	= { 0xff, 0x00 },
112 	[STB6100_K]		= { 0xc7, 0x38 },
113 	[STB6100_G]		= { 0xef, 0x10 },
114 	[STB6100_F]		= { 0x1f, 0xc0 },
115 	[STB6100_DLB]		= { 0x38, 0xc4 },
116 	[STB6100_TEST1]		= { 0x00, 0x8f },
117 	[STB6100_FCCK]		= { 0x40, 0x0d },
118 	[STB6100_LPEN]		= { 0xf0, 0x0b },
119 	[STB6100_TEST3]		= { 0x00, 0xde },
120 };
121 
122 /*
123  * Currently unused. Some boards might need it in the future
124  */
125 static inline void stb6100_normalise_regs(u8 regs[])
126 {
127 	int i;
128 
129 	for (i = 0; i < STB6100_NUMREGS; i++)
130 		regs[i] = (regs[i] & stb6100_template[i].mask) | stb6100_template[i].set;
131 }
132 
133 static int stb6100_read_regs(struct stb6100_state *state, u8 regs[])
134 {
135 	int rc;
136 	struct i2c_msg msg = {
137 		.addr	= state->config->tuner_address,
138 		.flags	= I2C_M_RD,
139 		.buf	= regs,
140 		.len	= STB6100_NUMREGS
141 	};
142 
143 	rc = i2c_transfer(state->i2c, &msg, 1);
144 	if (unlikely(rc != 1)) {
145 		dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]",
146 			state->config->tuner_address, rc);
147 
148 		return -EREMOTEIO;
149 	}
150 	if (unlikely(verbose > FE_DEBUG)) {
151 		int i;
152 
153 		dprintk(verbose, FE_DEBUG, 1, "    Read from 0x%02x", state->config->tuner_address);
154 		for (i = 0; i < STB6100_NUMREGS; i++)
155 			dprintk(verbose, FE_DEBUG, 1, "        %s: 0x%02x", stb6100_regnames[i], regs[i]);
156 	}
157 	return 0;
158 }
159 
160 static int stb6100_read_reg(struct stb6100_state *state, u8 reg)
161 {
162 	u8 regs[STB6100_NUMREGS];
163 
164 	struct i2c_msg msg = {
165 		.addr	= state->config->tuner_address + reg,
166 		.flags	= I2C_M_RD,
167 		.buf	= regs,
168 		.len	= 1
169 	};
170 
171 	i2c_transfer(state->i2c, &msg, 1);
172 
173 	if (unlikely(reg >= STB6100_NUMREGS)) {
174 		dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
175 		return -EINVAL;
176 	}
177 	if (unlikely(verbose > FE_DEBUG)) {
178 		dprintk(verbose, FE_DEBUG, 1, "    Read from 0x%02x", state->config->tuner_address);
179 		dprintk(verbose, FE_DEBUG, 1, "        %s: 0x%02x", stb6100_regnames[reg], regs[0]);
180 	}
181 
182 	return (unsigned int)regs[0];
183 }
184 
185 static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int start, int len)
186 {
187 	int rc;
188 	u8 cmdbuf[MAX_XFER_SIZE];
189 	struct i2c_msg msg = {
190 		.addr	= state->config->tuner_address,
191 		.flags	= 0,
192 		.buf	= cmdbuf,
193 		.len	= len + 1
194 	};
195 
196 	if (1 + len > sizeof(cmdbuf)) {
197 		printk(KERN_WARNING
198 		       "%s: i2c wr: len=%d is too big!\n",
199 		       KBUILD_MODNAME, len);
200 		return -EINVAL;
201 	}
202 
203 	if (unlikely(start < 1 || start + len > STB6100_NUMREGS)) {
204 		dprintk(verbose, FE_ERROR, 1, "Invalid register range %d:%d",
205 			start, len);
206 		return -EINVAL;
207 	}
208 	memcpy(&cmdbuf[1], buf, len);
209 	cmdbuf[0] = start;
210 
211 	if (unlikely(verbose > FE_DEBUG)) {
212 		int i;
213 
214 		dprintk(verbose, FE_DEBUG, 1, "    Write @ 0x%02x: [%d:%d]", state->config->tuner_address, start, len);
215 		for (i = 0; i < len; i++)
216 			dprintk(verbose, FE_DEBUG, 1, "        %s: 0x%02x", stb6100_regnames[start + i], buf[i]);
217 	}
218 	rc = i2c_transfer(state->i2c, &msg, 1);
219 	if (unlikely(rc != 1)) {
220 		dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]",
221 			(unsigned int)state->config->tuner_address, start, len,	rc);
222 		return -EREMOTEIO;
223 	}
224 	return 0;
225 }
226 
227 static int stb6100_write_reg(struct stb6100_state *state, u8 reg, u8 data)
228 {
229 	u8 tmp = data; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */
230 
231 	if (unlikely(reg >= STB6100_NUMREGS)) {
232 		dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg);
233 		return -EREMOTEIO;
234 	}
235 	tmp = (tmp & stb6100_template[reg].mask) | stb6100_template[reg].set;
236 	return stb6100_write_reg_range(state, &tmp, reg, 1);
237 }
238 
239 
240 static int stb6100_get_status(struct dvb_frontend *fe, u32 *status)
241 {
242 	int rc;
243 	struct stb6100_state *state = fe->tuner_priv;
244 
245 	rc = stb6100_read_reg(state, STB6100_LD);
246 	if (rc < 0) {
247 		dprintk(verbose, FE_ERROR, 1, "%s failed", __func__);
248 		return rc;
249 	}
250 	return (rc & STB6100_LD_LOCK) ? TUNER_STATUS_LOCKED : 0;
251 }
252 
253 static int stb6100_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
254 {
255 	int rc;
256 	u8 f;
257 	u32 bw;
258 	struct stb6100_state *state = fe->tuner_priv;
259 
260 	rc = stb6100_read_reg(state, STB6100_F);
261 	if (rc < 0)
262 		return rc;
263 	f = rc & STB6100_F_F;
264 
265 	bw = (f + 5) * 2000;	/* x2 for ZIF	*/
266 
267 	*bandwidth = state->bandwidth = bw * 1000;
268 	dprintk(verbose, FE_DEBUG, 1, "bandwidth = %u Hz", state->bandwidth);
269 	return 0;
270 }
271 
272 static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
273 {
274 	u32 tmp;
275 	int rc;
276 	struct stb6100_state *state = fe->tuner_priv;
277 
278 	dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u Hz", bandwidth);
279 
280 	bandwidth /= 2; /* ZIF */
281 
282 	if (bandwidth >= 36000000)	/* F[4:0] BW/2 max =31+5=36 mhz for F=31	*/
283 		tmp = 31;
284 	else if (bandwidth <= 5000000)	/* bw/2 min = 5Mhz for F=0			*/
285 		tmp = 0;
286 	else				/* if 5 < bw/2 < 36				*/
287 		tmp = (bandwidth + 500000) / 1000000 - 5;
288 
289 	/* Turn on LPF bandwidth setting clock control,
290 	 * set bandwidth, wait 10ms, turn off.
291 	 */
292 	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d | STB6100_FCCK_FCCK);
293 	if (rc < 0)
294 		return rc;
295 	rc = stb6100_write_reg(state, STB6100_F, 0xc0 | tmp);
296 	if (rc < 0)
297 		return rc;
298 
299 	msleep(5);  /*  This is dangerous as another (related) thread may start */
300 
301 	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
302 	if (rc < 0)
303 		return rc;
304 
305 	msleep(10);  /*  This is dangerous as another (related) thread may start */
306 
307 	return 0;
308 }
309 
310 static int stb6100_get_frequency(struct dvb_frontend *fe, u32 *frequency)
311 {
312 	int rc;
313 	u32 nint, nfrac, fvco;
314 	int psd2, odiv;
315 	struct stb6100_state *state = fe->tuner_priv;
316 	u8 regs[STB6100_NUMREGS];
317 
318 	rc = stb6100_read_regs(state, regs);
319 	if (rc < 0)
320 		return rc;
321 
322 	odiv = (regs[STB6100_VCO] & STB6100_VCO_ODIV) >> STB6100_VCO_ODIV_SHIFT;
323 	psd2 = (regs[STB6100_K] & STB6100_K_PSD2) >> STB6100_K_PSD2_SHIFT;
324 	nint = regs[STB6100_NI];
325 	nfrac = ((regs[STB6100_K] & STB6100_K_NF_MSB) << 8) | regs[STB6100_NF_LSB];
326 	fvco = (nfrac * state->reference >> (9 - psd2)) + (nint * state->reference << psd2);
327 	*frequency = state->frequency = fvco >> (odiv + 1);
328 
329 	dprintk(verbose, FE_DEBUG, 1,
330 		"frequency = %u kHz, odiv = %u, psd2 = %u, fxtal = %u kHz, fvco = %u kHz, N(I) = %u, N(F) = %u",
331 		state->frequency, odiv, psd2, state->reference,	fvco, nint, nfrac);
332 	return 0;
333 }
334 
335 
336 static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
337 {
338 	int rc;
339 	const struct stb6100_lkup *ptr;
340 	struct stb6100_state *state = fe->tuner_priv;
341 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
342 
343 	u32 srate = 0, fvco, nint, nfrac;
344 	u8 regs[STB6100_NUMREGS];
345 	u8 g, psd2, odiv;
346 
347 	dprintk(verbose, FE_DEBUG, 1, "Version 2010-8-14 13:51");
348 
349 	if (fe->ops.get_frontend) {
350 		dprintk(verbose, FE_DEBUG, 1, "Get frontend parameters");
351 		fe->ops.get_frontend(fe, p);
352 	}
353 	srate = p->symbol_rate;
354 
355 	/* Set up tuner cleanly, LPF calibration on */
356 	rc = stb6100_write_reg(state, STB6100_FCCK, 0x4d | STB6100_FCCK_FCCK);
357 	if (rc < 0)
358 		return rc;  /* allow LPF calibration */
359 
360 	/* PLL Loop disabled, bias on, VCO on, synth on */
361 	regs[STB6100_LPEN] = 0xeb;
362 	rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
363 	if (rc < 0)
364 		return rc;
365 
366 	/* Program the registers with their data values */
367 
368 	/* VCO divide ratio (LO divide ratio, VCO prescaler enable).	*/
369 	if (frequency <= 1075000)
370 		odiv = 1;
371 	else
372 		odiv = 0;
373 
374 	/* VCO enabled, search clock off as per LL3.7, 3.4.1 */
375 	regs[STB6100_VCO] = 0xe0 | (odiv << STB6100_VCO_ODIV_SHIFT);
376 
377 	/* OSM	*/
378 	for (ptr = lkup;
379 	     (ptr->val_high != 0) && !CHKRANGE(frequency, ptr->val_low, ptr->val_high);
380 	     ptr++);
381 
382 	if (ptr->val_high == 0) {
383 		printk(KERN_ERR "%s: frequency out of range: %u kHz\n", __func__, frequency);
384 		return -EINVAL;
385 	}
386 	regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_OSM) | ptr->reg;
387 	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
388 	if (rc < 0)
389 		return rc;
390 
391 	if ((frequency > 1075000) && (frequency <= 1325000))
392 		psd2 = 0;
393 	else
394 		psd2 = 1;
395 	/* F(VCO) = F(LO) * (ODIV == 0 ? 2 : 4)			*/
396 	fvco = frequency << (1 + odiv);
397 	/* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1)))	*/
398 	nint = fvco / (state->reference << psd2);
399 	/* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9	*/
400 	nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2))
401 					 << (9 - psd2), state->reference);
402 
403 	/* NI */
404 	regs[STB6100_NI] = nint;
405 	rc = stb6100_write_reg(state, STB6100_NI, regs[STB6100_NI]);
406 	if (rc < 0)
407 		return rc;
408 
409 	/* NF */
410 	regs[STB6100_NF_LSB] = nfrac;
411 	rc = stb6100_write_reg(state, STB6100_NF_LSB, regs[STB6100_NF_LSB]);
412 	if (rc < 0)
413 		return rc;
414 
415 	/* K */
416 	regs[STB6100_K] = (0x38 & ~STB6100_K_PSD2) | (psd2 << STB6100_K_PSD2_SHIFT);
417 	regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_NF_MSB) | ((nfrac >> 8) & STB6100_K_NF_MSB);
418 	rc = stb6100_write_reg(state, STB6100_K, regs[STB6100_K]);
419 	if (rc < 0)
420 		return rc;
421 
422 	/* G Baseband gain. */
423 	if (srate >= 15000000)
424 		g = 9;  /*  +4 dB */
425 	else if (srate >= 5000000)
426 		g = 11; /*  +8 dB */
427 	else
428 		g = 14; /* +14 dB */
429 
430 	regs[STB6100_G] = (0x10 & ~STB6100_G_G) | g;
431 	regs[STB6100_G] &= ~STB6100_G_GCT; /* mask GCT */
432 	regs[STB6100_G] |= (1 << 5); /* 2Vp-p Mode */
433 	rc = stb6100_write_reg(state, STB6100_G, regs[STB6100_G]);
434 	if (rc < 0)
435 		return rc;
436 
437 	/* F we don't write as it is set up in BW set */
438 
439 	/* DLB set DC servo loop BW to 160Hz (LLA 3.8 / 2.1) */
440 	regs[STB6100_DLB] = 0xcc;
441 	rc = stb6100_write_reg(state, STB6100_DLB, regs[STB6100_DLB]);
442 	if (rc < 0)
443 		return rc;
444 
445 	dprintk(verbose, FE_DEBUG, 1,
446 		"frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u",
447 		frequency, srate, (unsigned int)g, (unsigned int)odiv,
448 		(unsigned int)psd2, state->reference,
449 		ptr->reg, fvco, nint, nfrac);
450 
451 	/* Set up the test registers */
452 	regs[STB6100_TEST1] = 0x8f;
453 	rc = stb6100_write_reg(state, STB6100_TEST1, regs[STB6100_TEST1]);
454 	if (rc < 0)
455 		return rc;
456 	regs[STB6100_TEST3] = 0xde;
457 	rc = stb6100_write_reg(state, STB6100_TEST3, regs[STB6100_TEST3]);
458 	if (rc < 0)
459 		return rc;
460 
461 	/* Bring up tuner according to LLA 3.7 3.4.1, step 2 */
462 	regs[STB6100_LPEN] = 0xfb; /* PLL Loop enabled, bias on, VCO on, synth on */
463 	rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]);
464 	if (rc < 0)
465 		return rc;
466 
467 	msleep(2);
468 
469 	/* Bring up tuner according to LLA 3.7 3.4.1, step 3 */
470 	regs[STB6100_VCO] &= ~STB6100_VCO_OCK;		/* VCO fast search		*/
471 	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
472 	if (rc < 0)
473 		return rc;
474 
475 	msleep(10);  /*  This is dangerous as another (related) thread may start */ /* wait for LO to lock */
476 
477 	regs[STB6100_VCO] &= ~STB6100_VCO_OSCH;		/* vco search disabled		*/
478 	regs[STB6100_VCO] |= STB6100_VCO_OCK;		/* search clock off		*/
479 	rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]);
480 	if (rc < 0)
481 		return rc;
482 
483 	rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d);
484 	if (rc < 0)
485 		return rc;  /* Stop LPF calibration */
486 
487 	msleep(10);  /*  This is dangerous as another (related) thread may start */
488 		     /* wait for stabilisation, (should not be necessary)		*/
489 	return 0;
490 }
491 
492 static int stb6100_sleep(struct dvb_frontend *fe)
493 {
494 	/* TODO: power down	*/
495 	return 0;
496 }
497 
498 static int stb6100_init(struct dvb_frontend *fe)
499 {
500 	struct stb6100_state *state = fe->tuner_priv;
501 	int refclk = 27000000; /* Hz */
502 
503 	/*
504 	 * iqsense = 1
505 	 * tunerstep = 125000
506 	 */
507 	state->bandwidth        = 36000000;		/* Hz	*/
508 	state->reference	= refclk / 1000;	/* kHz	*/
509 
510 	/* Set default bandwidth. Modified, PN 13-May-10	*/
511 	return 0;
512 }
513 
514 static int stb6100_set_params(struct dvb_frontend *fe)
515 {
516 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
517 
518 	if (c->frequency > 0)
519 		stb6100_set_frequency(fe, c->frequency);
520 
521 	if (c->bandwidth_hz > 0)
522 		stb6100_set_bandwidth(fe, c->bandwidth_hz);
523 
524 	return 0;
525 }
526 
527 static const struct dvb_tuner_ops stb6100_ops = {
528 	.info = {
529 		.name			= "STB6100 Silicon Tuner",
530 		.frequency_min_hz	=  950 * MHz,
531 		.frequency_max_hz	= 2150 * MHz,
532 	},
533 
534 	.init		= stb6100_init,
535 	.sleep          = stb6100_sleep,
536 	.get_status	= stb6100_get_status,
537 	.set_params	= stb6100_set_params,
538 	.get_frequency  = stb6100_get_frequency,
539 	.get_bandwidth  = stb6100_get_bandwidth,
540 	.release	= stb6100_release
541 };
542 
543 struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe,
544 				    const struct stb6100_config *config,
545 				    struct i2c_adapter *i2c)
546 {
547 	struct stb6100_state *state = NULL;
548 
549 	state = kzalloc(sizeof (struct stb6100_state), GFP_KERNEL);
550 	if (!state)
551 		return NULL;
552 
553 	state->config		= config;
554 	state->i2c		= i2c;
555 	state->frontend		= fe;
556 	state->reference	= config->refclock / 1000; /* kHz */
557 	fe->tuner_priv		= state;
558 	fe->ops.tuner_ops	= stb6100_ops;
559 
560 	printk("%s: Attaching STB6100 \n", __func__);
561 	return fe;
562 }
563 
564 static void stb6100_release(struct dvb_frontend *fe)
565 {
566 	struct stb6100_state *state = fe->tuner_priv;
567 
568 	fe->tuner_priv = NULL;
569 	kfree(state);
570 }
571 
572 EXPORT_SYMBOL(stb6100_attach);
573 MODULE_PARM_DESC(verbose, "Set Verbosity level");
574 
575 MODULE_AUTHOR("Manu Abraham");
576 MODULE_DESCRIPTION("STB6100 Silicon tuner");
577 MODULE_LICENSE("GPL");
578