xref: /openbmc/linux/drivers/media/tuners/xc2028.c (revision 85030415)
1 // SPDX-License-Identifier: GPL-2.0
2 // xc2028
3 //
4 // Copyright (c) 2007-2008 Mauro Carvalho Chehab <mchehab@kernel.org>
5 //
6 // Copyright (c) 2007 Michel Ludwig (michel.ludwig@gmail.com)
7 //       - frontend interface
8 
9 #include <linux/i2c.h>
10 #include <asm/div64.h>
11 #include <linux/firmware.h>
12 #include <linux/videodev2.h>
13 #include <linux/delay.h>
14 #include <media/tuner.h>
15 #include <linux/mutex.h>
16 #include <linux/slab.h>
17 #include <asm/unaligned.h>
18 #include "tuner-i2c.h"
19 #include "xc2028.h"
20 #include "xc2028-types.h"
21 
22 #include <linux/dvb/frontend.h>
23 #include <media/dvb_frontend.h>
24 
25 /* Max transfer size done by I2C transfer functions */
26 #define MAX_XFER_SIZE  80
27 
28 /* Registers (Write-only) */
29 #define XREG_INIT         0x00
30 #define XREG_RF_FREQ      0x02
31 #define XREG_POWER_DOWN   0x08
32 
33 /* Registers (Read-only) */
34 #define XREG_FREQ_ERROR   0x01
35 #define XREG_LOCK         0x02
36 #define XREG_VERSION      0x04
37 #define XREG_PRODUCT_ID   0x08
38 #define XREG_HSYNC_FREQ   0x10
39 #define XREG_FRAME_LINES  0x20
40 #define XREG_SNR          0x40
41 
42 #define XREG_ADC_ENV      0x0100
43 
44 static int debug;
45 module_param(debug, int, 0644);
46 MODULE_PARM_DESC(debug, "enable verbose debug messages");
47 
48 static int no_poweroff;
49 module_param(no_poweroff, int, 0644);
50 MODULE_PARM_DESC(no_poweroff, "0 (default) powers device off when not used.\n"
51 	"1 keep device energized and with tuner ready all the times.\n"
52 	"  Faster, but consumes more power and keeps the device hotter\n");
53 
54 static char audio_std[8];
55 module_param_string(audio_std, audio_std, sizeof(audio_std), 0);
56 MODULE_PARM_DESC(audio_std,
57 	"Audio standard. XC3028 audio decoder explicitly needs to know what audio\n"
58 	"standard is needed for some video standards with audio A2 or NICAM.\n"
59 	"The valid values are:\n"
60 	"A2\n"
61 	"A2/A\n"
62 	"A2/B\n"
63 	"NICAM\n"
64 	"NICAM/A\n"
65 	"NICAM/B\n");
66 
67 static char firmware_name[30];
68 module_param_string(firmware_name, firmware_name, sizeof(firmware_name), 0);
69 MODULE_PARM_DESC(firmware_name,
70 		 "Firmware file name. Allows overriding the default firmware name\n");
71 
72 static LIST_HEAD(hybrid_tuner_instance_list);
73 static DEFINE_MUTEX(xc2028_list_mutex);
74 
75 /* struct for storing firmware table */
76 struct firmware_description {
77 	unsigned int  type;
78 	v4l2_std_id   id;
79 	__u16         int_freq;
80 	unsigned char *ptr;
81 	unsigned int  size;
82 };
83 
84 struct firmware_properties {
85 	unsigned int	type;
86 	v4l2_std_id	id;
87 	v4l2_std_id	std_req;
88 	__u16		int_freq;
89 	unsigned int	scode_table;
90 	int		scode_nr;
91 };
92 
93 enum xc2028_state {
94 	XC2028_NO_FIRMWARE = 0,
95 	XC2028_WAITING_FIRMWARE,
96 	XC2028_ACTIVE,
97 	XC2028_SLEEP,
98 	XC2028_NODEV,
99 };
100 
101 struct xc2028_data {
102 	struct list_head        hybrid_tuner_instance_list;
103 	struct tuner_i2c_props  i2c_props;
104 	__u32			frequency;
105 
106 	enum xc2028_state	state;
107 	const char		*fname;
108 
109 	struct firmware_description *firm;
110 	int			firm_size;
111 	__u16			firm_version;
112 
113 	__u16			hwmodel;
114 	__u16			hwvers;
115 
116 	struct xc2028_ctrl	ctrl;
117 
118 	struct firmware_properties cur_fw;
119 
120 	struct mutex lock;
121 };
122 
123 #define i2c_send(priv, buf, size) ({					\
124 	int _rc;							\
125 	_rc = tuner_i2c_xfer_send(&priv->i2c_props, buf, size);		\
126 	if (size != _rc)						\
127 		tuner_info("i2c output error: rc = %d (should be %d)\n",\
128 			   _rc, (int)size);				\
129 	if (priv->ctrl.msleep)						\
130 		msleep(priv->ctrl.msleep);				\
131 	_rc;								\
132 })
133 
134 #define i2c_send_recv(priv, obuf, osize, ibuf, isize) ({		\
135 	int _rc;							\
136 	_rc = tuner_i2c_xfer_send_recv(&priv->i2c_props, obuf, osize,	\
137 				       ibuf, isize);			\
138 	if (isize != _rc)						\
139 		tuner_err("i2c input error: rc = %d (should be %d)\n",	\
140 			   _rc, (int)isize);				\
141 	if (priv->ctrl.msleep)						\
142 		msleep(priv->ctrl.msleep);				\
143 	_rc;								\
144 })
145 
146 #define send_seq(priv, data...)	({					\
147 	static u8 _val[] = data;					\
148 	int _rc;							\
149 	if (sizeof(_val) !=						\
150 			(_rc = tuner_i2c_xfer_send(&priv->i2c_props,	\
151 						_val, sizeof(_val)))) {	\
152 		tuner_err("Error on line %d: %d\n", __LINE__, _rc);	\
153 	} else if (priv->ctrl.msleep)					\
154 		msleep(priv->ctrl.msleep);				\
155 	_rc;								\
156 })
157 
xc2028_get_reg(struct xc2028_data * priv,u16 reg,u16 * val)158 static int xc2028_get_reg(struct xc2028_data *priv, u16 reg, u16 *val)
159 {
160 	unsigned char buf[2];
161 	unsigned char ibuf[2];
162 
163 	tuner_dbg("%s %04x called\n", __func__, reg);
164 
165 	buf[0] = reg >> 8;
166 	buf[1] = (unsigned char) reg;
167 
168 	if (i2c_send_recv(priv, buf, 2, ibuf, 2) != 2)
169 		return -EIO;
170 
171 	*val = (ibuf[1]) | (ibuf[0] << 8);
172 	return 0;
173 }
174 
175 #define dump_firm_type(t)	dump_firm_type_and_int_freq(t, 0)
dump_firm_type_and_int_freq(unsigned int type,u16 int_freq)176 static void dump_firm_type_and_int_freq(unsigned int type, u16 int_freq)
177 {
178 	if (type & BASE)
179 		printk(KERN_CONT "BASE ");
180 	if (type & INIT1)
181 		printk(KERN_CONT "INIT1 ");
182 	if (type & F8MHZ)
183 		printk(KERN_CONT "F8MHZ ");
184 	if (type & MTS)
185 		printk(KERN_CONT "MTS ");
186 	if (type & D2620)
187 		printk(KERN_CONT "D2620 ");
188 	if (type & D2633)
189 		printk(KERN_CONT "D2633 ");
190 	if (type & DTV6)
191 		printk(KERN_CONT "DTV6 ");
192 	if (type & QAM)
193 		printk(KERN_CONT "QAM ");
194 	if (type & DTV7)
195 		printk(KERN_CONT "DTV7 ");
196 	if (type & DTV78)
197 		printk(KERN_CONT "DTV78 ");
198 	if (type & DTV8)
199 		printk(KERN_CONT "DTV8 ");
200 	if (type & FM)
201 		printk(KERN_CONT "FM ");
202 	if (type & INPUT1)
203 		printk(KERN_CONT "INPUT1 ");
204 	if (type & LCD)
205 		printk(KERN_CONT "LCD ");
206 	if (type & NOGD)
207 		printk(KERN_CONT "NOGD ");
208 	if (type & MONO)
209 		printk(KERN_CONT "MONO ");
210 	if (type & ATSC)
211 		printk(KERN_CONT "ATSC ");
212 	if (type & IF)
213 		printk(KERN_CONT "IF ");
214 	if (type & LG60)
215 		printk(KERN_CONT "LG60 ");
216 	if (type & ATI638)
217 		printk(KERN_CONT "ATI638 ");
218 	if (type & OREN538)
219 		printk(KERN_CONT "OREN538 ");
220 	if (type & OREN36)
221 		printk(KERN_CONT "OREN36 ");
222 	if (type & TOYOTA388)
223 		printk(KERN_CONT "TOYOTA388 ");
224 	if (type & TOYOTA794)
225 		printk(KERN_CONT "TOYOTA794 ");
226 	if (type & DIBCOM52)
227 		printk(KERN_CONT "DIBCOM52 ");
228 	if (type & ZARLINK456)
229 		printk(KERN_CONT "ZARLINK456 ");
230 	if (type & CHINA)
231 		printk(KERN_CONT "CHINA ");
232 	if (type & F6MHZ)
233 		printk(KERN_CONT "F6MHZ ");
234 	if (type & INPUT2)
235 		printk(KERN_CONT "INPUT2 ");
236 	if (type & SCODE)
237 		printk(KERN_CONT "SCODE ");
238 	if (type & HAS_IF)
239 		printk(KERN_CONT "HAS_IF_%d ", int_freq);
240 }
241 
parse_audio_std_option(void)242 static  v4l2_std_id parse_audio_std_option(void)
243 {
244 	if (strcasecmp(audio_std, "A2") == 0)
245 		return V4L2_STD_A2;
246 	if (strcasecmp(audio_std, "A2/A") == 0)
247 		return V4L2_STD_A2_A;
248 	if (strcasecmp(audio_std, "A2/B") == 0)
249 		return V4L2_STD_A2_B;
250 	if (strcasecmp(audio_std, "NICAM") == 0)
251 		return V4L2_STD_NICAM;
252 	if (strcasecmp(audio_std, "NICAM/A") == 0)
253 		return V4L2_STD_NICAM_A;
254 	if (strcasecmp(audio_std, "NICAM/B") == 0)
255 		return V4L2_STD_NICAM_B;
256 
257 	return 0;
258 }
259 
check_device_status(struct xc2028_data * priv)260 static int check_device_status(struct xc2028_data *priv)
261 {
262 	switch (priv->state) {
263 	case XC2028_NO_FIRMWARE:
264 	case XC2028_WAITING_FIRMWARE:
265 		return -EAGAIN;
266 	case XC2028_ACTIVE:
267 		return 1;
268 	case XC2028_SLEEP:
269 		return 0;
270 	case XC2028_NODEV:
271 		return -ENODEV;
272 	}
273 	return 0;
274 }
275 
free_firmware(struct xc2028_data * priv)276 static void free_firmware(struct xc2028_data *priv)
277 {
278 	int i;
279 	tuner_dbg("%s called\n", __func__);
280 
281 	/* free allocated f/w string */
282 	if (priv->fname != firmware_name)
283 		kfree(priv->fname);
284 	priv->fname = NULL;
285 
286 	priv->state = XC2028_NO_FIRMWARE;
287 	memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
288 
289 	if (!priv->firm)
290 		return;
291 
292 	for (i = 0; i < priv->firm_size; i++)
293 		kfree(priv->firm[i].ptr);
294 
295 	kfree(priv->firm);
296 
297 	priv->firm = NULL;
298 	priv->firm_size = 0;
299 }
300 
load_all_firmwares(struct dvb_frontend * fe,const struct firmware * fw)301 static int load_all_firmwares(struct dvb_frontend *fe,
302 			      const struct firmware *fw)
303 {
304 	struct xc2028_data    *priv = fe->tuner_priv;
305 	const unsigned char   *p, *endp;
306 	int                   rc = 0;
307 	int		      n, n_array;
308 	char		      name[33];
309 
310 	tuner_dbg("%s called\n", __func__);
311 
312 	p = fw->data;
313 	endp = p + fw->size;
314 
315 	if (fw->size < sizeof(name) - 1 + 2 + 2) {
316 		tuner_err("Error: firmware file %s has invalid size!\n",
317 			  priv->fname);
318 		goto corrupt;
319 	}
320 
321 	memcpy(name, p, sizeof(name) - 1);
322 	name[sizeof(name) - 1] = 0;
323 	p += sizeof(name) - 1;
324 
325 	priv->firm_version = get_unaligned_le16(p);
326 	p += 2;
327 
328 	n_array = get_unaligned_le16(p);
329 	p += 2;
330 
331 	tuner_info("Loading %d firmware images from %s, type: %s, ver %d.%d\n",
332 		   n_array, priv->fname, name,
333 		   priv->firm_version >> 8, priv->firm_version & 0xff);
334 
335 	priv->firm = kcalloc(n_array, sizeof(*priv->firm), GFP_KERNEL);
336 	if (priv->firm == NULL) {
337 		tuner_err("Not enough memory to load firmware file.\n");
338 		rc = -ENOMEM;
339 		goto err;
340 	}
341 	priv->firm_size = n_array;
342 
343 	n = -1;
344 	while (p < endp) {
345 		__u32 type, size;
346 		v4l2_std_id id;
347 		__u16 int_freq = 0;
348 
349 		n++;
350 		if (n >= n_array) {
351 			tuner_err("More firmware images in file than were expected!\n");
352 			goto corrupt;
353 		}
354 
355 		/* Checks if there's enough bytes to read */
356 		if (endp - p < sizeof(type) + sizeof(id) + sizeof(size))
357 			goto header;
358 
359 		type = get_unaligned_le32(p);
360 		p += sizeof(type);
361 
362 		id = get_unaligned_le64(p);
363 		p += sizeof(id);
364 
365 		if (type & HAS_IF) {
366 			int_freq = get_unaligned_le16(p);
367 			p += sizeof(int_freq);
368 			if (endp - p < sizeof(size))
369 				goto header;
370 		}
371 
372 		size = get_unaligned_le32(p);
373 		p += sizeof(size);
374 
375 		if (!size || size > endp - p) {
376 			tuner_err("Firmware type ");
377 			dump_firm_type(type);
378 			printk(KERN_CONT
379 			       "(%x), id %llx is corrupted (size=%zd, expected %d)\n",
380 			       type, (unsigned long long)id, (endp - p), size);
381 			goto corrupt;
382 		}
383 
384 		priv->firm[n].ptr = kmemdup(p, size, GFP_KERNEL);
385 		if (priv->firm[n].ptr == NULL) {
386 			tuner_err("Not enough memory to load firmware file.\n");
387 			rc = -ENOMEM;
388 			goto err;
389 		}
390 		tuner_dbg("Reading firmware type ");
391 		if (debug) {
392 			dump_firm_type_and_int_freq(type, int_freq);
393 			printk(KERN_CONT "(%x), id %llx, size=%d.\n",
394 			       type, (unsigned long long)id, size);
395 		}
396 
397 		priv->firm[n].type = type;
398 		priv->firm[n].id   = id;
399 		priv->firm[n].size = size;
400 		priv->firm[n].int_freq = int_freq;
401 
402 		p += size;
403 	}
404 
405 	if (n + 1 != priv->firm_size) {
406 		tuner_err("Firmware file is incomplete!\n");
407 		goto corrupt;
408 	}
409 
410 	goto done;
411 
412 header:
413 	tuner_err("Firmware header is incomplete!\n");
414 corrupt:
415 	rc = -EINVAL;
416 	tuner_err("Error: firmware file is corrupted!\n");
417 
418 err:
419 	tuner_info("Releasing partially loaded firmware file.\n");
420 	free_firmware(priv);
421 
422 done:
423 	if (rc == 0)
424 		tuner_dbg("Firmware files loaded.\n");
425 	else
426 		priv->state = XC2028_NODEV;
427 
428 	return rc;
429 }
430 
seek_firmware(struct dvb_frontend * fe,unsigned int type,v4l2_std_id * id)431 static int seek_firmware(struct dvb_frontend *fe, unsigned int type,
432 			 v4l2_std_id *id)
433 {
434 	struct xc2028_data *priv = fe->tuner_priv;
435 	int                 i, best_i = -1, best_nr_matches = 0;
436 	unsigned int        type_mask = 0;
437 
438 	tuner_dbg("%s called, want type=", __func__);
439 	if (debug) {
440 		dump_firm_type(type);
441 		printk(KERN_CONT "(%x), id %016llx.\n",
442 		       type, (unsigned long long)*id);
443 	}
444 
445 	if (!priv->firm) {
446 		tuner_err("Error! firmware not loaded\n");
447 		return -EINVAL;
448 	}
449 
450 	if (((type & ~SCODE) == 0) && (*id == 0))
451 		*id = V4L2_STD_PAL;
452 
453 	if (type & BASE)
454 		type_mask = BASE_TYPES;
455 	else if (type & SCODE) {
456 		type &= SCODE_TYPES;
457 		type_mask = SCODE_TYPES & ~HAS_IF;
458 	} else if (type & DTV_TYPES)
459 		type_mask = DTV_TYPES;
460 	else if (type & STD_SPECIFIC_TYPES)
461 		type_mask = STD_SPECIFIC_TYPES;
462 
463 	type &= type_mask;
464 
465 	if (!(type & SCODE))
466 		type_mask = ~0;
467 
468 	/* Seek for exact match */
469 	for (i = 0; i < priv->firm_size; i++) {
470 		if ((type == (priv->firm[i].type & type_mask)) &&
471 		    (*id == priv->firm[i].id))
472 			goto found;
473 	}
474 
475 	/* Seek for generic video standard match */
476 	for (i = 0; i < priv->firm_size; i++) {
477 		v4l2_std_id match_mask;
478 		int nr_matches;
479 
480 		if (type != (priv->firm[i].type & type_mask))
481 			continue;
482 
483 		match_mask = *id & priv->firm[i].id;
484 		if (!match_mask)
485 			continue;
486 
487 		if ((*id & match_mask) == *id)
488 			goto found; /* Supports all the requested standards */
489 
490 		nr_matches = hweight64(match_mask);
491 		if (nr_matches > best_nr_matches) {
492 			best_nr_matches = nr_matches;
493 			best_i = i;
494 		}
495 	}
496 
497 	if (best_nr_matches > 0) {
498 		tuner_dbg("Selecting best matching firmware (%d bits) for type=",
499 			  best_nr_matches);
500 		dump_firm_type(type);
501 		printk(KERN_CONT
502 		       "(%x), id %016llx:\n", type, (unsigned long long)*id);
503 		i = best_i;
504 		goto found;
505 	}
506 
507 	/*FIXME: Would make sense to seek for type "hint" match ? */
508 
509 	i = -ENOENT;
510 	goto ret;
511 
512 found:
513 	*id = priv->firm[i].id;
514 
515 ret:
516 	tuner_dbg("%s firmware for type=", (i < 0) ? "Can't find" : "Found");
517 	if (debug) {
518 		dump_firm_type(type);
519 		printk(KERN_CONT "(%x), id %016llx.\n",
520 		       type, (unsigned long long)*id);
521 	}
522 	return i;
523 }
524 
do_tuner_callback(struct dvb_frontend * fe,int cmd,int arg)525 static inline int do_tuner_callback(struct dvb_frontend *fe, int cmd, int arg)
526 {
527 	struct xc2028_data *priv = fe->tuner_priv;
528 
529 	/* analog side (tuner-core) uses i2c_adap->algo_data.
530 	 * digital side is not guaranteed to have algo_data defined.
531 	 *
532 	 * digital side will always have fe->dvb defined.
533 	 * analog side (tuner-core) doesn't (yet) define fe->dvb.
534 	 */
535 
536 	return (!fe->callback) ? -EINVAL :
537 		fe->callback(((fe->dvb) && (fe->dvb->priv)) ?
538 				fe->dvb->priv : priv->i2c_props.adap->algo_data,
539 			     DVB_FRONTEND_COMPONENT_TUNER, cmd, arg);
540 }
541 
load_firmware(struct dvb_frontend * fe,unsigned int type,v4l2_std_id * id)542 static int load_firmware(struct dvb_frontend *fe, unsigned int type,
543 			 v4l2_std_id *id)
544 {
545 	struct xc2028_data *priv = fe->tuner_priv;
546 	int                pos, rc;
547 	unsigned char      *p, *endp, buf[MAX_XFER_SIZE];
548 
549 	if (priv->ctrl.max_len > sizeof(buf))
550 		priv->ctrl.max_len = sizeof(buf);
551 
552 	tuner_dbg("%s called\n", __func__);
553 
554 	pos = seek_firmware(fe, type, id);
555 	if (pos < 0)
556 		return pos;
557 
558 	tuner_info("Loading firmware for type=");
559 	dump_firm_type(priv->firm[pos].type);
560 	printk(KERN_CONT "(%x), id %016llx.\n",
561 	       priv->firm[pos].type, (unsigned long long)*id);
562 
563 	p = priv->firm[pos].ptr;
564 	endp = p + priv->firm[pos].size;
565 
566 	while (p < endp) {
567 		__u16 size;
568 
569 		/* Checks if there's enough bytes to read */
570 		if (p + sizeof(size) > endp) {
571 			tuner_err("Firmware chunk size is wrong\n");
572 			return -EINVAL;
573 		}
574 
575 		size = le16_to_cpu(*(__le16 *) p);
576 		p += sizeof(size);
577 
578 		if (size == 0xffff)
579 			return 0;
580 
581 		if (!size) {
582 			/* Special callback command received */
583 			rc = do_tuner_callback(fe, XC2028_TUNER_RESET, 0);
584 			if (rc < 0) {
585 				tuner_err("Error at RESET code %d\n",
586 					   (*p) & 0x7f);
587 				return -EINVAL;
588 			}
589 			continue;
590 		}
591 		if (size >= 0xff00) {
592 			switch (size) {
593 			case 0xff00:
594 				rc = do_tuner_callback(fe, XC2028_RESET_CLK, 0);
595 				if (rc < 0) {
596 					tuner_err("Error at RESET code %d\n",
597 						  (*p) & 0x7f);
598 					return -EINVAL;
599 				}
600 				break;
601 			default:
602 				tuner_info("Invalid RESET code %d\n",
603 					   size & 0x7f);
604 				return -EINVAL;
605 
606 			}
607 			continue;
608 		}
609 
610 		/* Checks for a sleep command */
611 		if (size & 0x8000) {
612 			msleep(size & 0x7fff);
613 			continue;
614 		}
615 
616 		if ((size + p > endp)) {
617 			tuner_err("missing bytes: need %d, have %zd\n",
618 				   size, (endp - p));
619 			return -EINVAL;
620 		}
621 
622 		buf[0] = *p;
623 		p++;
624 		size--;
625 
626 		/* Sends message chunks */
627 		while (size > 0) {
628 			int len = (size < priv->ctrl.max_len - 1) ?
629 				   size : priv->ctrl.max_len - 1;
630 
631 			memcpy(buf + 1, p, len);
632 
633 			rc = i2c_send(priv, buf, len + 1);
634 			if (rc < 0) {
635 				tuner_err("%d returned from send\n", rc);
636 				return -EINVAL;
637 			}
638 
639 			p += len;
640 			size -= len;
641 		}
642 
643 		/* silently fail if the frontend doesn't support I2C flush */
644 		rc = do_tuner_callback(fe, XC2028_I2C_FLUSH, 0);
645 		if ((rc < 0) && (rc != -EINVAL)) {
646 			tuner_err("error executing flush: %d\n", rc);
647 			return rc;
648 		}
649 	}
650 	return 0;
651 }
652 
load_scode(struct dvb_frontend * fe,unsigned int type,v4l2_std_id * id,__u16 int_freq,int scode)653 static int load_scode(struct dvb_frontend *fe, unsigned int type,
654 			 v4l2_std_id *id, __u16 int_freq, int scode)
655 {
656 	struct xc2028_data *priv = fe->tuner_priv;
657 	int                pos, rc;
658 	unsigned char	   *p;
659 
660 	tuner_dbg("%s called\n", __func__);
661 
662 	if (!int_freq) {
663 		pos = seek_firmware(fe, type, id);
664 		if (pos < 0)
665 			return pos;
666 	} else {
667 		for (pos = 0; pos < priv->firm_size; pos++) {
668 			if ((priv->firm[pos].int_freq == int_freq) &&
669 			    (priv->firm[pos].type & HAS_IF))
670 				break;
671 		}
672 		if (pos == priv->firm_size)
673 			return -ENOENT;
674 	}
675 
676 	p = priv->firm[pos].ptr;
677 
678 	if (priv->firm[pos].type & HAS_IF) {
679 		if (priv->firm[pos].size != 12 * 16 || scode >= 16)
680 			return -EINVAL;
681 		p += 12 * scode;
682 	} else {
683 		/* 16 SCODE entries per file; each SCODE entry is 12 bytes and
684 		 * has a 2-byte size header in the firmware format. */
685 		if (priv->firm[pos].size != 14 * 16 || scode >= 16 ||
686 		    le16_to_cpu(*(__le16 *)(p + 14 * scode)) != 12)
687 			return -EINVAL;
688 		p += 14 * scode + 2;
689 	}
690 
691 	tuner_info("Loading SCODE for type=");
692 	dump_firm_type_and_int_freq(priv->firm[pos].type,
693 				    priv->firm[pos].int_freq);
694 	printk(KERN_CONT "(%x), id %016llx.\n", priv->firm[pos].type,
695 	       (unsigned long long)*id);
696 
697 	if (priv->firm_version < 0x0202)
698 		rc = send_seq(priv, {0x20, 0x00, 0x00, 0x00});
699 	else
700 		rc = send_seq(priv, {0xa0, 0x00, 0x00, 0x00});
701 	if (rc < 0)
702 		return -EIO;
703 
704 	rc = i2c_send(priv, p, 12);
705 	if (rc < 0)
706 		return -EIO;
707 
708 	rc = send_seq(priv, {0x00, 0x8c});
709 	if (rc < 0)
710 		return -EIO;
711 
712 	return 0;
713 }
714 
715 static int xc2028_sleep(struct dvb_frontend *fe);
716 
check_firmware(struct dvb_frontend * fe,unsigned int type,v4l2_std_id std,__u16 int_freq)717 static int check_firmware(struct dvb_frontend *fe, unsigned int type,
718 			  v4l2_std_id std, __u16 int_freq)
719 {
720 	struct xc2028_data         *priv = fe->tuner_priv;
721 	struct firmware_properties new_fw;
722 	int			   rc, retry_count = 0;
723 	u16			   version, hwmodel;
724 	v4l2_std_id		   std0;
725 
726 	tuner_dbg("%s called\n", __func__);
727 
728 	rc = check_device_status(priv);
729 	if (rc < 0)
730 		return rc;
731 
732 	if (priv->ctrl.mts && !(type & FM))
733 		type |= MTS;
734 
735 retry:
736 	new_fw.type = type;
737 	new_fw.id = std;
738 	new_fw.std_req = std;
739 	new_fw.scode_table = SCODE | priv->ctrl.scode_table;
740 	new_fw.scode_nr = 0;
741 	new_fw.int_freq = int_freq;
742 
743 	tuner_dbg("checking firmware, user requested type=");
744 	if (debug) {
745 		dump_firm_type(new_fw.type);
746 		printk(KERN_CONT "(%x), id %016llx, ", new_fw.type,
747 		       (unsigned long long)new_fw.std_req);
748 		if (!int_freq) {
749 			printk(KERN_CONT "scode_tbl ");
750 			dump_firm_type(priv->ctrl.scode_table);
751 			printk(KERN_CONT "(%x), ", priv->ctrl.scode_table);
752 		} else
753 			printk(KERN_CONT "int_freq %d, ", new_fw.int_freq);
754 		printk(KERN_CONT "scode_nr %d\n", new_fw.scode_nr);
755 	}
756 
757 	/*
758 	 * No need to reload base firmware if it matches and if the tuner
759 	 * is not at sleep mode
760 	 */
761 	if ((priv->state == XC2028_ACTIVE) &&
762 	    (((BASE | new_fw.type) & BASE_TYPES) ==
763 	    (priv->cur_fw.type & BASE_TYPES))) {
764 		tuner_dbg("BASE firmware not changed.\n");
765 		goto skip_base;
766 	}
767 
768 	/* Updating BASE - forget about all currently loaded firmware */
769 	memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
770 
771 	/* Reset is needed before loading firmware */
772 	rc = do_tuner_callback(fe, XC2028_TUNER_RESET, 0);
773 	if (rc < 0)
774 		goto fail;
775 
776 	/* BASE firmwares are all std0 */
777 	std0 = 0;
778 	rc = load_firmware(fe, BASE | new_fw.type, &std0);
779 	if (rc < 0) {
780 		tuner_err("Error %d while loading base firmware\n",
781 			  rc);
782 		goto fail;
783 	}
784 
785 	/* Load INIT1, if needed */
786 	tuner_dbg("Load init1 firmware, if exists\n");
787 
788 	rc = load_firmware(fe, BASE | INIT1 | new_fw.type, &std0);
789 	if (rc == -ENOENT)
790 		rc = load_firmware(fe, (BASE | INIT1 | new_fw.type) & ~F8MHZ,
791 				   &std0);
792 	if (rc < 0 && rc != -ENOENT) {
793 		tuner_err("Error %d while loading init1 firmware\n",
794 			  rc);
795 		goto fail;
796 	}
797 
798 skip_base:
799 	/*
800 	 * No need to reload standard specific firmware if base firmware
801 	 * was not reloaded and requested video standards have not changed.
802 	 */
803 	if (priv->cur_fw.type == (BASE | new_fw.type) &&
804 	    priv->cur_fw.std_req == std) {
805 		tuner_dbg("Std-specific firmware already loaded.\n");
806 		goto skip_std_specific;
807 	}
808 
809 	/* Reloading std-specific firmware forces a SCODE update */
810 	priv->cur_fw.scode_table = 0;
811 
812 	rc = load_firmware(fe, new_fw.type, &new_fw.id);
813 	if (rc == -ENOENT)
814 		rc = load_firmware(fe, new_fw.type & ~F8MHZ, &new_fw.id);
815 
816 	if (rc < 0)
817 		goto fail;
818 
819 skip_std_specific:
820 	if (priv->cur_fw.scode_table == new_fw.scode_table &&
821 	    priv->cur_fw.scode_nr == new_fw.scode_nr) {
822 		tuner_dbg("SCODE firmware already loaded.\n");
823 		goto check_device;
824 	}
825 
826 	if (new_fw.type & FM)
827 		goto check_device;
828 
829 	/* Load SCODE firmware, if exists */
830 	tuner_dbg("Trying to load scode %d\n", new_fw.scode_nr);
831 
832 	rc = load_scode(fe, new_fw.type | new_fw.scode_table, &new_fw.id,
833 			new_fw.int_freq, new_fw.scode_nr);
834 
835 check_device:
836 	if (xc2028_get_reg(priv, 0x0004, &version) < 0 ||
837 	    xc2028_get_reg(priv, 0x0008, &hwmodel) < 0) {
838 		tuner_err("Unable to read tuner registers.\n");
839 		goto fail;
840 	}
841 
842 	tuner_dbg("Device is Xceive %d version %d.%d, firmware version %d.%d\n",
843 		  hwmodel, (version & 0xf000) >> 12, (version & 0xf00) >> 8,
844 		  (version & 0xf0) >> 4, version & 0xf);
845 
846 
847 	if (priv->ctrl.read_not_reliable)
848 		goto read_not_reliable;
849 
850 	/* Check firmware version against what we downloaded. */
851 	if (priv->firm_version != ((version & 0xf0) << 4 | (version & 0x0f))) {
852 		if (!priv->ctrl.read_not_reliable) {
853 			tuner_err("Incorrect readback of firmware version.\n");
854 			goto fail;
855 		} else {
856 			tuner_err("Returned an incorrect version. However, read is not reliable enough. Ignoring it.\n");
857 			hwmodel = 3028;
858 		}
859 	}
860 
861 	/* Check that the tuner hardware model remains consistent over time. */
862 	if (priv->hwmodel == 0 && (hwmodel == 2028 || hwmodel == 3028)) {
863 		priv->hwmodel = hwmodel;
864 		priv->hwvers  = version & 0xff00;
865 	} else if (priv->hwmodel == 0 || priv->hwmodel != hwmodel ||
866 		   priv->hwvers != (version & 0xff00)) {
867 		tuner_err("Read invalid device hardware information - tuner hung?\n");
868 		goto fail;
869 	}
870 
871 read_not_reliable:
872 	priv->cur_fw = new_fw;
873 
874 	/*
875 	 * By setting BASE in cur_fw.type only after successfully loading all
876 	 * firmwares, we can:
877 	 * 1. Identify that BASE firmware with type=0 has been loaded;
878 	 * 2. Tell whether BASE firmware was just changed the next time through.
879 	 */
880 	priv->cur_fw.type |= BASE;
881 	priv->state = XC2028_ACTIVE;
882 
883 	return 0;
884 
885 fail:
886 	free_firmware(priv);
887 
888 	if (retry_count < 8) {
889 		msleep(50);
890 		retry_count++;
891 		tuner_dbg("Retrying firmware load\n");
892 		goto retry;
893 	}
894 
895 	/* Firmware didn't load. Put the device to sleep */
896 	xc2028_sleep(fe);
897 
898 	if (rc == -ENOENT)
899 		rc = -EINVAL;
900 	return rc;
901 }
902 
xc2028_signal(struct dvb_frontend * fe,u16 * strength)903 static int xc2028_signal(struct dvb_frontend *fe, u16 *strength)
904 {
905 	struct xc2028_data *priv = fe->tuner_priv;
906 	u16                 frq_lock, signal = 0;
907 	int                 rc, i;
908 
909 	tuner_dbg("%s called\n", __func__);
910 
911 	rc = check_device_status(priv);
912 	if (rc < 0)
913 		return rc;
914 
915 	/* If the device is sleeping, no channel is tuned */
916 	if (!rc) {
917 		*strength = 0;
918 		return 0;
919 	}
920 
921 	mutex_lock(&priv->lock);
922 
923 	/* Sync Lock Indicator */
924 	for (i = 0; i < 3; i++) {
925 		rc = xc2028_get_reg(priv, XREG_LOCK, &frq_lock);
926 		if (rc < 0)
927 			goto ret;
928 
929 		if (frq_lock)
930 			break;
931 		msleep(6);
932 	}
933 
934 	/* Frequency didn't lock */
935 	if (frq_lock == 2)
936 		goto ret;
937 
938 	/* Get SNR of the video signal */
939 	rc = xc2028_get_reg(priv, XREG_SNR, &signal);
940 	if (rc < 0)
941 		goto ret;
942 
943 	/* Signal level is 3 bits only */
944 
945 	signal = ((1 << 12) - 1) | ((signal & 0x07) << 12);
946 
947 ret:
948 	mutex_unlock(&priv->lock);
949 
950 	*strength = signal;
951 
952 	tuner_dbg("signal strength is %d\n", signal);
953 
954 	return rc;
955 }
956 
xc2028_get_afc(struct dvb_frontend * fe,s32 * afc)957 static int xc2028_get_afc(struct dvb_frontend *fe, s32 *afc)
958 {
959 	struct xc2028_data *priv = fe->tuner_priv;
960 	int i, rc;
961 	u16 frq_lock = 0;
962 	s16 afc_reg = 0;
963 
964 	rc = check_device_status(priv);
965 	if (rc < 0)
966 		return rc;
967 
968 	/* If the device is sleeping, no channel is tuned */
969 	if (!rc) {
970 		*afc = 0;
971 		return 0;
972 	}
973 
974 	mutex_lock(&priv->lock);
975 
976 	/* Sync Lock Indicator */
977 	for (i = 0; i < 3; i++) {
978 		rc = xc2028_get_reg(priv, XREG_LOCK, &frq_lock);
979 		if (rc < 0)
980 			goto ret;
981 
982 		if (frq_lock)
983 			break;
984 		msleep(6);
985 	}
986 
987 	/* Frequency didn't lock */
988 	if (frq_lock == 2)
989 		goto ret;
990 
991 	/* Get AFC */
992 	rc = xc2028_get_reg(priv, XREG_FREQ_ERROR, &afc_reg);
993 	if (rc < 0)
994 		goto ret;
995 
996 	*afc = afc_reg * 15625; /* Hz */
997 
998 	tuner_dbg("AFC is %d Hz\n", *afc);
999 
1000 ret:
1001 	mutex_unlock(&priv->lock);
1002 
1003 	return rc;
1004 }
1005 
1006 #define DIV 15625
1007 
generic_set_freq(struct dvb_frontend * fe,u32 freq,enum v4l2_tuner_type new_type,unsigned int type,v4l2_std_id std,u16 int_freq)1008 static int generic_set_freq(struct dvb_frontend *fe, u32 freq /* in HZ */,
1009 			    enum v4l2_tuner_type new_type,
1010 			    unsigned int type,
1011 			    v4l2_std_id std,
1012 			    u16 int_freq)
1013 {
1014 	struct xc2028_data *priv = fe->tuner_priv;
1015 	int		   rc = -EINVAL;
1016 	unsigned char	   buf[4];
1017 	u32		   div, offset = 0;
1018 
1019 	tuner_dbg("%s called\n", __func__);
1020 
1021 	mutex_lock(&priv->lock);
1022 
1023 	tuner_dbg("should set frequency %d kHz\n", freq / 1000);
1024 
1025 	if (check_firmware(fe, type, std, int_freq) < 0)
1026 		goto ret;
1027 
1028 	/* On some cases xc2028 can disable video output, if
1029 	 * very weak signals are received. By sending a soft
1030 	 * reset, this is re-enabled. So, it is better to always
1031 	 * send a soft reset before changing channels, to be sure
1032 	 * that xc2028 will be in a safe state.
1033 	 * Maybe this might also be needed for DTV.
1034 	 */
1035 	switch (new_type) {
1036 	case V4L2_TUNER_ANALOG_TV:
1037 		rc = send_seq(priv, {0x00, 0x00});
1038 
1039 		/* Analog mode requires offset = 0 */
1040 		break;
1041 	case V4L2_TUNER_RADIO:
1042 		/* Radio mode requires offset = 0 */
1043 		break;
1044 	case V4L2_TUNER_DIGITAL_TV:
1045 		/*
1046 		 * Digital modes require an offset to adjust to the
1047 		 * proper frequency. The offset depends on what
1048 		 * firmware version is used.
1049 		 */
1050 
1051 		/*
1052 		 * Adjust to the center frequency. This is calculated by the
1053 		 * formula: offset = 1.25MHz - BW/2
1054 		 * For DTV 7/8, the firmware uses BW = 8000, so it needs a
1055 		 * further adjustment to get the frequency center on VHF
1056 		 */
1057 
1058 		/*
1059 		 * The firmware DTV78 used to work fine in UHF band (8 MHz
1060 		 * bandwidth) but not at all in VHF band (7 MHz bandwidth).
1061 		 * The real problem was connected to the formula used to
1062 		 * calculate the center frequency offset in VHF band.
1063 		 * In fact, removing the 500KHz adjustment fixed the problem.
1064 		 * This is coherent to what was implemented for the DTV7
1065 		 * firmware.
1066 		 * In the end, now the center frequency is the same for all 3
1067 		 * firmwares (DTV7, DTV8, DTV78) and doesn't depend on channel
1068 		 * bandwidth.
1069 		 */
1070 
1071 		if (priv->cur_fw.type & DTV6)
1072 			offset = 1750000;
1073 		else	/* DTV7 or DTV8 or DTV78 */
1074 			offset = 2750000;
1075 
1076 		/*
1077 		 * xc3028 additional "magic"
1078 		 * Depending on the firmware version, it needs some adjustments
1079 		 * to properly centralize the frequency. This seems to be
1080 		 * needed to compensate the SCODE table adjustments made by
1081 		 * newer firmwares
1082 		 */
1083 
1084 		/*
1085 		 * The proper adjustment would be to do it at s-code table.
1086 		 * However, this didn't work, as reported by
1087 		 * Robert Lowery <rglowery@exemail.com.au>
1088 		 */
1089 
1090 #if 0
1091 		/*
1092 		 * Still need tests for XC3028L (firmware 3.2 or upper)
1093 		 * So, for now, let's just comment the per-firmware
1094 		 * version of this change. Reports with xc3028l working
1095 		 * with and without the lines below are welcome
1096 		 */
1097 
1098 		if (priv->firm_version < 0x0302) {
1099 			if (priv->cur_fw.type & DTV7)
1100 				offset += 500000;
1101 		} else {
1102 			if (priv->cur_fw.type & DTV7)
1103 				offset -= 300000;
1104 			else if (type != ATSC) /* DVB @6MHz, DTV 8 and DTV 7/8 */
1105 				offset += 200000;
1106 		}
1107 #endif
1108 		break;
1109 	default:
1110 		tuner_err("Unsupported tuner type %d.\n", new_type);
1111 		break;
1112 	}
1113 
1114 	div = (freq - offset + DIV / 2) / DIV;
1115 
1116 	/* CMD= Set frequency */
1117 	if (priv->firm_version < 0x0202)
1118 		rc = send_seq(priv, {0x00, XREG_RF_FREQ, 0x00, 0x00});
1119 	else
1120 		rc = send_seq(priv, {0x80, XREG_RF_FREQ, 0x00, 0x00});
1121 	if (rc < 0)
1122 		goto ret;
1123 
1124 	/* Return code shouldn't be checked.
1125 	   The reset CLK is needed only with tm6000.
1126 	   Driver should work fine even if this fails.
1127 	 */
1128 	if (priv->ctrl.msleep)
1129 		msleep(priv->ctrl.msleep);
1130 	do_tuner_callback(fe, XC2028_RESET_CLK, 1);
1131 
1132 	msleep(10);
1133 
1134 	buf[0] = 0xff & (div >> 24);
1135 	buf[1] = 0xff & (div >> 16);
1136 	buf[2] = 0xff & (div >> 8);
1137 	buf[3] = 0xff & (div);
1138 
1139 	rc = i2c_send(priv, buf, sizeof(buf));
1140 	if (rc < 0)
1141 		goto ret;
1142 	msleep(100);
1143 
1144 	priv->frequency = freq;
1145 
1146 	tuner_dbg("divisor= %*ph (freq=%d.%03d)\n", 4, buf,
1147 	       freq / 1000000, (freq % 1000000) / 1000);
1148 
1149 	rc = 0;
1150 
1151 ret:
1152 	mutex_unlock(&priv->lock);
1153 
1154 	return rc;
1155 }
1156 
xc2028_set_analog_freq(struct dvb_frontend * fe,struct analog_parameters * p)1157 static int xc2028_set_analog_freq(struct dvb_frontend *fe,
1158 			      struct analog_parameters *p)
1159 {
1160 	struct xc2028_data *priv = fe->tuner_priv;
1161 	unsigned int       type=0;
1162 
1163 	tuner_dbg("%s called\n", __func__);
1164 
1165 	if (p->mode == V4L2_TUNER_RADIO) {
1166 		type |= FM;
1167 		if (priv->ctrl.input1)
1168 			type |= INPUT1;
1169 		return generic_set_freq(fe, (625l * p->frequency) / 10,
1170 				V4L2_TUNER_RADIO, type, 0, 0);
1171 	}
1172 
1173 	/* if std is not defined, choose one */
1174 	if (!p->std)
1175 		p->std = V4L2_STD_MN;
1176 
1177 	/* PAL/M, PAL/N, PAL/Nc and NTSC variants should use 6MHz firmware */
1178 	if (!(p->std & V4L2_STD_MN))
1179 		type |= F8MHZ;
1180 
1181 	/* Add audio hack to std mask */
1182 	p->std |= parse_audio_std_option();
1183 
1184 	return generic_set_freq(fe, 62500l * p->frequency,
1185 				V4L2_TUNER_ANALOG_TV, type, p->std, 0);
1186 }
1187 
xc2028_set_params(struct dvb_frontend * fe)1188 static int xc2028_set_params(struct dvb_frontend *fe)
1189 {
1190 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1191 	u32 delsys = c->delivery_system;
1192 	u32 bw = c->bandwidth_hz;
1193 	struct xc2028_data *priv = fe->tuner_priv;
1194 	int rc;
1195 	unsigned int       type = 0;
1196 	u16                demod = 0;
1197 
1198 	tuner_dbg("%s called\n", __func__);
1199 
1200 	rc = check_device_status(priv);
1201 	if (rc < 0)
1202 		return rc;
1203 
1204 	switch (delsys) {
1205 	case SYS_DVBT:
1206 	case SYS_DVBT2:
1207 		/*
1208 		 * The only countries with 6MHz seem to be Taiwan/Uruguay.
1209 		 * Both seem to require QAM firmware for OFDM decoding
1210 		 * Tested in Taiwan by Terry Wu <terrywu2009@gmail.com>
1211 		 */
1212 		if (bw <= 6000000)
1213 			type |= QAM;
1214 
1215 		switch (priv->ctrl.type) {
1216 		case XC2028_D2633:
1217 			type |= D2633;
1218 			break;
1219 		case XC2028_D2620:
1220 			type |= D2620;
1221 			break;
1222 		case XC2028_AUTO:
1223 		default:
1224 			/* Zarlink seems to need D2633 */
1225 			if (priv->ctrl.demod == XC3028_FE_ZARLINK456)
1226 				type |= D2633;
1227 			else
1228 				type |= D2620;
1229 		}
1230 		break;
1231 	case SYS_ATSC:
1232 		/* The only ATSC firmware (at least on v2.7) is D2633 */
1233 		type |= ATSC | D2633;
1234 		break;
1235 	/* DVB-S and pure QAM (FE_QAM) are not supported */
1236 	default:
1237 		return -EINVAL;
1238 	}
1239 
1240 	if (bw <= 6000000) {
1241 		type |= DTV6;
1242 		priv->ctrl.vhfbw7 = 0;
1243 		priv->ctrl.uhfbw8 = 0;
1244 	} else if (bw <= 7000000) {
1245 		if (c->frequency < 470000000)
1246 			priv->ctrl.vhfbw7 = 1;
1247 		else
1248 			priv->ctrl.uhfbw8 = 0;
1249 		type |= (priv->ctrl.vhfbw7 && priv->ctrl.uhfbw8) ? DTV78 : DTV7;
1250 		type |= F8MHZ;
1251 	} else {
1252 		if (c->frequency < 470000000)
1253 			priv->ctrl.vhfbw7 = 0;
1254 		else
1255 			priv->ctrl.uhfbw8 = 1;
1256 		type |= (priv->ctrl.vhfbw7 && priv->ctrl.uhfbw8) ? DTV78 : DTV8;
1257 		type |= F8MHZ;
1258 	}
1259 
1260 	/* All S-code tables need a 200kHz shift */
1261 	if (priv->ctrl.demod) {
1262 		demod = priv->ctrl.demod;
1263 
1264 		/*
1265 		 * Newer firmwares require a 200 kHz offset only for ATSC
1266 		 */
1267 		if (type == ATSC || priv->firm_version < 0x0302)
1268 			demod += 200;
1269 		/*
1270 		 * The DTV7 S-code table needs a 700 kHz shift.
1271 		 *
1272 		 * DTV7 is only used in Australia.  Germany or Italy may also
1273 		 * use this firmware after initialization, but a tune to a UHF
1274 		 * channel should then cause DTV78 to be used.
1275 		 *
1276 		 * Unfortunately, on real-field tests, the s-code offset
1277 		 * didn't work as expected, as reported by
1278 		 * Robert Lowery <rglowery@exemail.com.au>
1279 		 */
1280 	}
1281 
1282 	return generic_set_freq(fe, c->frequency,
1283 				V4L2_TUNER_DIGITAL_TV, type, 0, demod);
1284 }
1285 
xc2028_sleep(struct dvb_frontend * fe)1286 static int xc2028_sleep(struct dvb_frontend *fe)
1287 {
1288 	struct xc2028_data *priv = fe->tuner_priv;
1289 	int rc;
1290 
1291 	rc = check_device_status(priv);
1292 	if (rc < 0)
1293 		return rc;
1294 
1295 	/* Device is already in sleep mode */
1296 	if (!rc)
1297 		return 0;
1298 
1299 	/* Avoid firmware reload on slow devices or if PM disabled */
1300 	if (no_poweroff || priv->ctrl.disable_power_mgmt)
1301 		return 0;
1302 
1303 	tuner_dbg("Putting xc2028/3028 into poweroff mode.\n");
1304 	if (debug > 1) {
1305 		tuner_dbg("Printing sleep stack trace:\n");
1306 		dump_stack();
1307 	}
1308 
1309 	mutex_lock(&priv->lock);
1310 
1311 	if (priv->firm_version < 0x0202)
1312 		rc = send_seq(priv, {0x00, XREG_POWER_DOWN, 0x00, 0x00});
1313 	else
1314 		rc = send_seq(priv, {0x80, XREG_POWER_DOWN, 0x00, 0x00});
1315 
1316 	if (rc >= 0)
1317 		priv->state = XC2028_SLEEP;
1318 
1319 	mutex_unlock(&priv->lock);
1320 
1321 	return rc;
1322 }
1323 
xc2028_dvb_release(struct dvb_frontend * fe)1324 static void xc2028_dvb_release(struct dvb_frontend *fe)
1325 {
1326 	struct xc2028_data *priv = fe->tuner_priv;
1327 
1328 	tuner_dbg("%s called\n", __func__);
1329 
1330 	mutex_lock(&xc2028_list_mutex);
1331 
1332 	/* only perform final cleanup if this is the last instance */
1333 	if (hybrid_tuner_report_instance_count(priv) == 1)
1334 		free_firmware(priv);
1335 
1336 	if (priv)
1337 		hybrid_tuner_release_state(priv);
1338 
1339 	mutex_unlock(&xc2028_list_mutex);
1340 
1341 	fe->tuner_priv = NULL;
1342 }
1343 
xc2028_get_frequency(struct dvb_frontend * fe,u32 * frequency)1344 static int xc2028_get_frequency(struct dvb_frontend *fe, u32 *frequency)
1345 {
1346 	struct xc2028_data *priv = fe->tuner_priv;
1347 	int rc;
1348 
1349 	tuner_dbg("%s called\n", __func__);
1350 
1351 	rc = check_device_status(priv);
1352 	if (rc < 0)
1353 		return rc;
1354 
1355 	*frequency = priv->frequency;
1356 
1357 	return 0;
1358 }
1359 
load_firmware_cb(const struct firmware * fw,void * context)1360 static void load_firmware_cb(const struct firmware *fw,
1361 			     void *context)
1362 {
1363 	struct dvb_frontend *fe = context;
1364 	struct xc2028_data *priv;
1365 	int rc;
1366 
1367 	if (!fe) {
1368 		pr_warn("xc2028: No frontend in %s\n", __func__);
1369 		return;
1370 	}
1371 
1372 	priv = fe->tuner_priv;
1373 
1374 	tuner_dbg("request_firmware_nowait(): %s\n", fw ? "OK" : "error");
1375 	if (!fw) {
1376 		tuner_err("Could not load firmware %s.\n", priv->fname);
1377 		priv->state = XC2028_NODEV;
1378 		return;
1379 	}
1380 
1381 	rc = load_all_firmwares(fe, fw);
1382 
1383 	release_firmware(fw);
1384 
1385 	if (rc < 0)
1386 		return;
1387 	priv->state = XC2028_ACTIVE;
1388 }
1389 
xc2028_set_config(struct dvb_frontend * fe,void * priv_cfg)1390 static int xc2028_set_config(struct dvb_frontend *fe, void *priv_cfg)
1391 {
1392 	struct xc2028_data *priv = fe->tuner_priv;
1393 	struct xc2028_ctrl *p    = priv_cfg;
1394 	int                 rc   = 0;
1395 
1396 	tuner_dbg("%s called\n", __func__);
1397 
1398 	mutex_lock(&priv->lock);
1399 
1400 	/*
1401 	 * Copy the config data.
1402 	 */
1403 	memcpy(&priv->ctrl, p, sizeof(priv->ctrl));
1404 
1405 	/*
1406 	 * If firmware name changed, frees firmware. As free_firmware will
1407 	 * reset the status to NO_FIRMWARE, this forces a new request_firmware
1408 	 */
1409 	if (!firmware_name[0] && p->fname &&
1410 	    priv->fname && strcmp(p->fname, priv->fname))
1411 		free_firmware(priv);
1412 
1413 	if (priv->ctrl.max_len < 9)
1414 		priv->ctrl.max_len = 13;
1415 
1416 	if (priv->state == XC2028_NO_FIRMWARE) {
1417 		if (!firmware_name[0])
1418 			priv->fname = kstrdup(p->fname, GFP_KERNEL);
1419 		else
1420 			priv->fname = firmware_name;
1421 
1422 		if (!priv->fname) {
1423 			rc = -ENOMEM;
1424 			goto unlock;
1425 		}
1426 
1427 		rc = request_firmware_nowait(THIS_MODULE, 1,
1428 					     priv->fname,
1429 					     priv->i2c_props.adap->dev.parent,
1430 					     GFP_KERNEL,
1431 					     fe, load_firmware_cb);
1432 		if (rc < 0) {
1433 			tuner_err("Failed to request firmware %s\n",
1434 				  priv->fname);
1435 			priv->state = XC2028_NODEV;
1436 		} else
1437 			priv->state = XC2028_WAITING_FIRMWARE;
1438 	}
1439 unlock:
1440 	mutex_unlock(&priv->lock);
1441 
1442 	return rc;
1443 }
1444 
1445 static const struct dvb_tuner_ops xc2028_dvb_tuner_ops = {
1446 	.info = {
1447 		 .name = "Xceive XC3028",
1448 		 .frequency_min_hz  =  42 * MHz,
1449 		 .frequency_max_hz  = 864 * MHz,
1450 		 .frequency_step_hz =  50 * kHz,
1451 		 },
1452 
1453 	.set_config	   = xc2028_set_config,
1454 	.set_analog_params = xc2028_set_analog_freq,
1455 	.release           = xc2028_dvb_release,
1456 	.get_frequency     = xc2028_get_frequency,
1457 	.get_rf_strength   = xc2028_signal,
1458 	.get_afc           = xc2028_get_afc,
1459 	.set_params        = xc2028_set_params,
1460 	.sleep             = xc2028_sleep,
1461 };
1462 
xc2028_attach(struct dvb_frontend * fe,struct xc2028_config * cfg)1463 struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,
1464 				   struct xc2028_config *cfg)
1465 {
1466 	struct xc2028_data *priv;
1467 	int instance;
1468 
1469 	if (debug)
1470 		printk(KERN_DEBUG "xc2028: Xcv2028/3028 init called!\n");
1471 
1472 	if (NULL == cfg)
1473 		return NULL;
1474 
1475 	if (!fe) {
1476 		printk(KERN_ERR "xc2028: No frontend!\n");
1477 		return NULL;
1478 	}
1479 
1480 	mutex_lock(&xc2028_list_mutex);
1481 
1482 	instance = hybrid_tuner_request_state(struct xc2028_data, priv,
1483 					      hybrid_tuner_instance_list,
1484 					      cfg->i2c_adap, cfg->i2c_addr,
1485 					      "xc2028");
1486 	switch (instance) {
1487 	case 0:
1488 		/* memory allocation failure */
1489 		goto fail;
1490 	case 1:
1491 		/* new tuner instance */
1492 		priv->ctrl.max_len = 13;
1493 
1494 		mutex_init(&priv->lock);
1495 
1496 		fe->tuner_priv = priv;
1497 		break;
1498 	case 2:
1499 		/* existing tuner instance */
1500 		fe->tuner_priv = priv;
1501 		break;
1502 	}
1503 
1504 	memcpy(&fe->ops.tuner_ops, &xc2028_dvb_tuner_ops,
1505 	       sizeof(xc2028_dvb_tuner_ops));
1506 
1507 	tuner_info("type set to %s\n", "XCeive xc2028/xc3028 tuner");
1508 
1509 	if (cfg->ctrl)
1510 		xc2028_set_config(fe, cfg->ctrl);
1511 
1512 	mutex_unlock(&xc2028_list_mutex);
1513 
1514 	return fe;
1515 fail:
1516 	mutex_unlock(&xc2028_list_mutex);
1517 
1518 	xc2028_dvb_release(fe);
1519 	return NULL;
1520 }
1521 
1522 EXPORT_SYMBOL_GPL(xc2028_attach);
1523 
1524 MODULE_DESCRIPTION("Xceive xc2028/xc3028 tuner driver");
1525 MODULE_AUTHOR("Michel Ludwig <michel.ludwig@gmail.com>");
1526 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
1527 MODULE_LICENSE("GPL v2");
1528 MODULE_FIRMWARE(XC2028_DEFAULT_FIRMWARE);
1529 MODULE_FIRMWARE(XC3028L_DEFAULT_FIRMWARE);
1530