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Merge branch 'work.regset' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux/fpc-iii.git] / drivers / media / tuners / tuner-xc2028.c
blob574c3bb135d7250f8c10144d8cf3f2b0ac8e8ab3
1 // SPDX-License-Identifier: GPL-2.0
2 // tuner-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 "tuner-xc2028.h"
20 #include "tuner-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
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)
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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 = fe->tuner_priv;
1365 int rc;
1366
1367 tuner_dbg("request_firmware_nowait(): %s\n", fw ? "OK" : "error");
1368 if (!fw) {
1369 tuner_err("Could not load firmware %s.\n", priv->fname);
1370 priv->state = XC2028_NODEV;
1371 return;
1372 }
1373
1374 rc = load_all_firmwares(fe, fw);
1375
1376 release_firmware(fw);
1377
1378 if (rc < 0)
1379 return;
1380 priv->state = XC2028_ACTIVE;
1381 }
1382
1383 static int xc2028_set_config(struct dvb_frontend *fe, void *priv_cfg)
1384 {
1385 struct xc2028_data *priv = fe->tuner_priv;
1386 struct xc2028_ctrl *p = priv_cfg;
1387 int rc = 0;
1388
1389 tuner_dbg("%s called\n", __func__);
1390
1391 mutex_lock(&priv->lock);
1392
1393 /*
1394 * Copy the config data.
1395 */
1396 memcpy(&priv->ctrl, p, sizeof(priv->ctrl));
1397
1398 /*
1399 * If firmware name changed, frees firmware. As free_firmware will
1400 * reset the status to NO_FIRMWARE, this forces a new request_firmware
1401 */
1402 if (!firmware_name[0] && p->fname &&
1403 priv->fname && strcmp(p->fname, priv->fname))
1404 free_firmware(priv);
1405
1406 if (priv->ctrl.max_len < 9)
1407 priv->ctrl.max_len = 13;
1408
1409 if (priv->state == XC2028_NO_FIRMWARE) {
1410 if (!firmware_name[0])
1411 priv->fname = kstrdup(p->fname, GFP_KERNEL);
1412 else
1413 priv->fname = firmware_name;
1414
1415 if (!priv->fname) {
1416 rc = -ENOMEM;
1417 goto unlock;
1418 }
1419
1420 rc = request_firmware_nowait(THIS_MODULE, 1,
1421 priv->fname,
1422 priv->i2c_props.adap->dev.parent,
1423 GFP_KERNEL,
1424 fe, load_firmware_cb);
1425 if (rc < 0) {
1426 tuner_err("Failed to request firmware %s\n",
1427 priv->fname);
1428 priv->state = XC2028_NODEV;
1429 } else
1430 priv->state = XC2028_WAITING_FIRMWARE;
1431 }
1432 unlock:
1433 mutex_unlock(&priv->lock);
1434
1435 return rc;
1436 }
1437
1438 static const struct dvb_tuner_ops xc2028_dvb_tuner_ops = {
1439 .info = {
1440 .name = "Xceive XC3028",
1441 .frequency_min_hz = 42 * MHz,
1442 .frequency_max_hz = 864 * MHz,
1443 .frequency_step_hz = 50 * kHz,
1444 },
1445
1446 .set_config = xc2028_set_config,
1447 .set_analog_params = xc2028_set_analog_freq,
1448 .release = xc2028_dvb_release,
1449 .get_frequency = xc2028_get_frequency,
1450 .get_rf_strength = xc2028_signal,
1451 .get_afc = xc2028_get_afc,
1452 .set_params = xc2028_set_params,
1453 .sleep = xc2028_sleep,
1454 };
1455
1456 struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,
1457 struct xc2028_config *cfg)
1458 {
1459 struct xc2028_data *priv;
1460 int instance;
1461
1462 if (debug)
1463 printk(KERN_DEBUG "xc2028: Xcv2028/3028 init called!\n");
1464
1465 if (NULL == cfg)
1466 return NULL;
1467
1468 if (!fe) {
1469 printk(KERN_ERR "xc2028: No frontend!\n");
1470 return NULL;
1471 }
1472
1473 mutex_lock(&xc2028_list_mutex);
1474
1475 instance = hybrid_tuner_request_state(struct xc2028_data, priv,
1476 hybrid_tuner_instance_list,
1477 cfg->i2c_adap, cfg->i2c_addr,
1478 "xc2028");
1479 switch (instance) {
1480 case 0:
1481 /* memory allocation failure */
1482 goto fail;
1483 case 1:
1484 /* new tuner instance */
1485 priv->ctrl.max_len = 13;
1486
1487 mutex_init(&priv->lock);
1488
1489 fe->tuner_priv = priv;
1490 break;
1491 case 2:
1492 /* existing tuner instance */
1493 fe->tuner_priv = priv;
1494 break;
1495 }
1496
1497 memcpy(&fe->ops.tuner_ops, &xc2028_dvb_tuner_ops,
1498 sizeof(xc2028_dvb_tuner_ops));
1499
1500 tuner_info("type set to %s\n", "XCeive xc2028/xc3028 tuner");
1501
1502 if (cfg->ctrl)
1503 xc2028_set_config(fe, cfg->ctrl);
1504
1505 mutex_unlock(&xc2028_list_mutex);
1506
1507 return fe;
1508 fail:
1509 mutex_unlock(&xc2028_list_mutex);
1510
1511 xc2028_dvb_release(fe);
1512 return NULL;
1513 }
1514
1515 EXPORT_SYMBOL(xc2028_attach);
1516
1517 MODULE_DESCRIPTION("Xceive xc2028/xc3028 tuner driver");
1518 MODULE_AUTHOR("Michel Ludwig <michel.ludwig@gmail.com>");
1519 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
1520 MODULE_LICENSE("GPL v2");
1521 MODULE_FIRMWARE(XC2028_DEFAULT_FIRMWARE);
1522 MODULE_FIRMWARE(XC3028L_DEFAULT_FIRMWARE);
Linux with added FPC-III support