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arm64: futex: Avoid copying out uninitialised stack in failed cmpxchg()
[linux/fpc-iii.git] / drivers / media / tuners / tuner-xc2028.c
blobaa6861dcd3fd78fd0df75c358b1149564564371a
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 = kzalloc(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 memcpy(priv->firm[n].ptr, p, size);
398 priv->firm[n].type = type;
399 priv->firm[n].id = id;
400 priv->firm[n].size = size;
401 priv->firm[n].int_freq = int_freq;
402
403 p += size;
404 }
405
406 if (n + 1 != priv->firm_size) {
407 tuner_err("Firmware file is incomplete!\n");
408 goto corrupt;
409 }
410
411 goto done;
412
413 header:
414 tuner_err("Firmware header is incomplete!\n");
415 corrupt:
416 rc = -EINVAL;
417 tuner_err("Error: firmware file is corrupted!\n");
418
419 err:
420 tuner_info("Releasing partially loaded firmware file.\n");
421 free_firmware(priv);
422
423 done:
424 if (rc == 0)
425 tuner_dbg("Firmware files loaded.\n");
426 else
427 priv->state = XC2028_NODEV;
428
429 return rc;
430 }
431
432 static int seek_firmware(struct dvb_frontend *fe, unsigned int type,
433 v4l2_std_id *id)
434 {
435 struct xc2028_data *priv = fe->tuner_priv;
436 int i, best_i = -1, best_nr_matches = 0;
437 unsigned int type_mask = 0;
438
439 tuner_dbg("%s called, want type=", __func__);
440 if (debug) {
441 dump_firm_type(type);
442 printk(KERN_CONT "(%x), id %016llx.\n",
443 type, (unsigned long long)*id);
444 }
445
446 if (!priv->firm) {
447 tuner_err("Error! firmware not loaded\n");
448 return -EINVAL;
449 }
450
451 if (((type & ~SCODE) == 0) && (*id == 0))
452 *id = V4L2_STD_PAL;
453
454 if (type & BASE)
455 type_mask = BASE_TYPES;
456 else if (type & SCODE) {
457 type &= SCODE_TYPES;
458 type_mask = SCODE_TYPES & ~HAS_IF;
459 } else if (type & DTV_TYPES)
460 type_mask = DTV_TYPES;
461 else if (type & STD_SPECIFIC_TYPES)
462 type_mask = STD_SPECIFIC_TYPES;
463
464 type &= type_mask;
465
466 if (!(type & SCODE))
467 type_mask = ~0;
468
469 /* Seek for exact match */
470 for (i = 0; i < priv->firm_size; i++) {
471 if ((type == (priv->firm[i].type & type_mask)) &&
472 (*id == priv->firm[i].id))
473 goto found;
474 }
475
476 /* Seek for generic video standard match */
477 for (i = 0; i < priv->firm_size; i++) {
478 v4l2_std_id match_mask;
479 int nr_matches;
480
481 if (type != (priv->firm[i].type & type_mask))
482 continue;
483
484 match_mask = *id & priv->firm[i].id;
485 if (!match_mask)
486 continue;
487
488 if ((*id & match_mask) == *id)
489 goto found; /* Supports all the requested standards */
490
491 nr_matches = hweight64(match_mask);
492 if (nr_matches > best_nr_matches) {
493 best_nr_matches = nr_matches;
494 best_i = i;
495 }
496 }
497
498 if (best_nr_matches > 0) {
499 tuner_dbg("Selecting best matching firmware (%d bits) for type=",
500 best_nr_matches);
501 dump_firm_type(type);
502 printk(KERN_CONT
503 "(%x), id %016llx:\n", type, (unsigned long long)*id);
504 i = best_i;
505 goto found;
506 }
507
508 /*FIXME: Would make sense to seek for type "hint" match ? */
509
510 i = -ENOENT;
511 goto ret;
512
513 found:
514 *id = priv->firm[i].id;
515
516 ret:
517 tuner_dbg("%s firmware for type=", (i < 0) ? "Can't find" : "Found");
518 if (debug) {
519 dump_firm_type(type);
520 printk(KERN_CONT "(%x), id %016llx.\n",
521 type, (unsigned long long)*id);
522 }
523 return i;
524 }
525
526 static inline int do_tuner_callback(struct dvb_frontend *fe, int cmd, int arg)
527 {
528 struct xc2028_data *priv = fe->tuner_priv;
529
530 /* analog side (tuner-core) uses i2c_adap->algo_data.
531 * digital side is not guaranteed to have algo_data defined.
532 *
533 * digital side will always have fe->dvb defined.
534 * analog side (tuner-core) doesn't (yet) define fe->dvb.
535 */
536
537 return (!fe->callback) ? -EINVAL :
538 fe->callback(((fe->dvb) && (fe->dvb->priv)) ?
539 fe->dvb->priv : priv->i2c_props.adap->algo_data,
540 DVB_FRONTEND_COMPONENT_TUNER, cmd, arg);
541 }
542
543 static int load_firmware(struct dvb_frontend *fe, unsigned int type,
544 v4l2_std_id *id)
545 {
546 struct xc2028_data *priv = fe->tuner_priv;
547 int pos, rc;
548 unsigned char *p, *endp, buf[MAX_XFER_SIZE];
549
550 if (priv->ctrl.max_len > sizeof(buf))
551 priv->ctrl.max_len = sizeof(buf);
552
553 tuner_dbg("%s called\n", __func__);
554
555 pos = seek_firmware(fe, type, id);
556 if (pos < 0)
557 return pos;
558
559 tuner_info("Loading firmware for type=");
560 dump_firm_type(priv->firm[pos].type);
561 printk(KERN_CONT "(%x), id %016llx.\n",
562 priv->firm[pos].type, (unsigned long long)*id);
563
564 p = priv->firm[pos].ptr;
565 endp = p + priv->firm[pos].size;
566
567 while (p < endp) {
568 __u16 size;
569
570 /* Checks if there's enough bytes to read */
571 if (p + sizeof(size) > endp) {
572 tuner_err("Firmware chunk size is wrong\n");
573 return -EINVAL;
574 }
575
576 size = le16_to_cpu(*(__le16 *) p);
577 p += sizeof(size);
578
579 if (size == 0xffff)
580 return 0;
581
582 if (!size) {
583 /* Special callback command received */
584 rc = do_tuner_callback(fe, XC2028_TUNER_RESET, 0);
585 if (rc < 0) {
586 tuner_err("Error at RESET code %d\n",
587 (*p) & 0x7f);
588 return -EINVAL;
589 }
590 continue;
591 }
592 if (size >= 0xff00) {
593 switch (size) {
594 case 0xff00:
595 rc = do_tuner_callback(fe, XC2028_RESET_CLK, 0);
596 if (rc < 0) {
597 tuner_err("Error at RESET code %d\n",
598 (*p) & 0x7f);
599 return -EINVAL;
600 }
601 break;
602 default:
603 tuner_info("Invalid RESET code %d\n",
604 size & 0x7f);
605 return -EINVAL;
606
607 }
608 continue;
609 }
610
611 /* Checks for a sleep command */
612 if (size & 0x8000) {
613 msleep(size & 0x7fff);
614 continue;
615 }
616
617 if ((size + p > endp)) {
618 tuner_err("missing bytes: need %d, have %zd\n",
619 size, (endp - p));
620 return -EINVAL;
621 }
622
623 buf[0] = *p;
624 p++;
625 size--;
626
627 /* Sends message chunks */
628 while (size > 0) {
629 int len = (size < priv->ctrl.max_len - 1) ?
630 size : priv->ctrl.max_len - 1;
631
632 memcpy(buf + 1, p, len);
633
634 rc = i2c_send(priv, buf, len + 1);
635 if (rc < 0) {
636 tuner_err("%d returned from send\n", rc);
637 return -EINVAL;
638 }
639
640 p += len;
641 size -= len;
642 }
643
644 /* silently fail if the frontend doesn't support I2C flush */
645 rc = do_tuner_callback(fe, XC2028_I2C_FLUSH, 0);
646 if ((rc < 0) && (rc != -EINVAL)) {
647 tuner_err("error executing flush: %d\n", rc);
648 return rc;
649 }
650 }
651 return 0;
652 }
653
654 static int load_scode(struct dvb_frontend *fe, unsigned int type,
655 v4l2_std_id *id, __u16 int_freq, int scode)
656 {
657 struct xc2028_data *priv = fe->tuner_priv;
658 int pos, rc;
659 unsigned char *p;
660
661 tuner_dbg("%s called\n", __func__);
662
663 if (!int_freq) {
664 pos = seek_firmware(fe, type, id);
665 if (pos < 0)
666 return pos;
667 } else {
668 for (pos = 0; pos < priv->firm_size; pos++) {
669 if ((priv->firm[pos].int_freq == int_freq) &&
670 (priv->firm[pos].type & HAS_IF))
671 break;
672 }
673 if (pos == priv->firm_size)
674 return -ENOENT;
675 }
676
677 p = priv->firm[pos].ptr;
678
679 if (priv->firm[pos].type & HAS_IF) {
680 if (priv->firm[pos].size != 12 * 16 || scode >= 16)
681 return -EINVAL;
682 p += 12 * scode;
683 } else {
684 /* 16 SCODE entries per file; each SCODE entry is 12 bytes and
685 * has a 2-byte size header in the firmware format. */
686 if (priv->firm[pos].size != 14 * 16 || scode >= 16 ||
687 le16_to_cpu(*(__le16 *)(p + 14 * scode)) != 12)
688 return -EINVAL;
689 p += 14 * scode + 2;
690 }
691
692 tuner_info("Loading SCODE for type=");
693 dump_firm_type_and_int_freq(priv->firm[pos].type,
694 priv->firm[pos].int_freq);
695 printk(KERN_CONT "(%x), id %016llx.\n", priv->firm[pos].type,
696 (unsigned long long)*id);
697
698 if (priv->firm_version < 0x0202)
699 rc = send_seq(priv, {0x20, 0x00, 0x00, 0x00});
700 else
701 rc = send_seq(priv, {0xa0, 0x00, 0x00, 0x00});
702 if (rc < 0)
703 return -EIO;
704
705 rc = i2c_send(priv, p, 12);
706 if (rc < 0)
707 return -EIO;
708
709 rc = send_seq(priv, {0x00, 0x8c});
710 if (rc < 0)
711 return -EIO;
712
713 return 0;
714 }
715
716 static int xc2028_sleep(struct dvb_frontend *fe);
717
718 static int check_firmware(struct dvb_frontend *fe, unsigned int type,
719 v4l2_std_id std, __u16 int_freq)
720 {
721 struct xc2028_data *priv = fe->tuner_priv;
722 struct firmware_properties new_fw;
723 int rc, retry_count = 0;
724 u16 version, hwmodel;
725 v4l2_std_id std0;
726
727 tuner_dbg("%s called\n", __func__);
728
729 rc = check_device_status(priv);
730 if (rc < 0)
731 return rc;
732
733 if (priv->ctrl.mts && !(type & FM))
734 type |= MTS;
735
736 retry:
737 new_fw.type = type;
738 new_fw.id = std;
739 new_fw.std_req = std;
740 new_fw.scode_table = SCODE | priv->ctrl.scode_table;
741 new_fw.scode_nr = 0;
742 new_fw.int_freq = int_freq;
743
744 tuner_dbg("checking firmware, user requested type=");
745 if (debug) {
746 dump_firm_type(new_fw.type);
747 printk(KERN_CONT "(%x), id %016llx, ", new_fw.type,
748 (unsigned long long)new_fw.std_req);
749 if (!int_freq) {
750 printk(KERN_CONT "scode_tbl ");
751 dump_firm_type(priv->ctrl.scode_table);
752 printk(KERN_CONT "(%x), ", priv->ctrl.scode_table);
753 } else
754 printk(KERN_CONT "int_freq %d, ", new_fw.int_freq);
755 printk(KERN_CONT "scode_nr %d\n", new_fw.scode_nr);
756 }
757
758 /*
759 * No need to reload base firmware if it matches and if the tuner
760 * is not at sleep mode
761 */
762 if ((priv->state == XC2028_ACTIVE) &&
763 (((BASE | new_fw.type) & BASE_TYPES) ==
764 (priv->cur_fw.type & BASE_TYPES))) {
765 tuner_dbg("BASE firmware not changed.\n");
766 goto skip_base;
767 }
768
769 /* Updating BASE - forget about all currently loaded firmware */
770 memset(&priv->cur_fw, 0, sizeof(priv->cur_fw));
771
772 /* Reset is needed before loading firmware */
773 rc = do_tuner_callback(fe, XC2028_TUNER_RESET, 0);
774 if (rc < 0)
775 goto fail;
776
777 /* BASE firmwares are all std0 */
778 std0 = 0;
779 rc = load_firmware(fe, BASE | new_fw.type, &std0);
780 if (rc < 0) {
781 tuner_err("Error %d while loading base firmware\n",
782 rc);
783 goto fail;
784 }
785
786 /* Load INIT1, if needed */
787 tuner_dbg("Load init1 firmware, if exists\n");
788
789 rc = load_firmware(fe, BASE | INIT1 | new_fw.type, &std0);
790 if (rc == -ENOENT)
791 rc = load_firmware(fe, (BASE | INIT1 | new_fw.type) & ~F8MHZ,
792 &std0);
793 if (rc < 0 && rc != -ENOENT) {
794 tuner_err("Error %d while loading init1 firmware\n",
795 rc);
796 goto fail;
797 }
798
799 skip_base:
800 /*
801 * No need to reload standard specific firmware if base firmware
802 * was not reloaded and requested video standards have not changed.
803 */
804 if (priv->cur_fw.type == (BASE | new_fw.type) &&
805 priv->cur_fw.std_req == std) {
806 tuner_dbg("Std-specific firmware already loaded.\n");
807 goto skip_std_specific;
808 }
809
810 /* Reloading std-specific firmware forces a SCODE update */
811 priv->cur_fw.scode_table = 0;
812
813 rc = load_firmware(fe, new_fw.type, &new_fw.id);
814 if (rc == -ENOENT)
815 rc = load_firmware(fe, new_fw.type & ~F8MHZ, &new_fw.id);
816
817 if (rc < 0)
818 goto fail;
819
820 skip_std_specific:
821 if (priv->cur_fw.scode_table == new_fw.scode_table &&
822 priv->cur_fw.scode_nr == new_fw.scode_nr) {
823 tuner_dbg("SCODE firmware already loaded.\n");
824 goto check_device;
825 }
826
827 if (new_fw.type & FM)
828 goto check_device;
829
830 /* Load SCODE firmware, if exists */
831 tuner_dbg("Trying to load scode %d\n", new_fw.scode_nr);
832
833 rc = load_scode(fe, new_fw.type | new_fw.scode_table, &new_fw.id,
834 new_fw.int_freq, new_fw.scode_nr);
835
836 check_device:
837 if (xc2028_get_reg(priv, 0x0004, &version) < 0 ||
838 xc2028_get_reg(priv, 0x0008, &hwmodel) < 0) {
839 tuner_err("Unable to read tuner registers.\n");
840 goto fail;
841 }
842
843 tuner_dbg("Device is Xceive %d version %d.%d, firmware version %d.%d\n",
844 hwmodel, (version & 0xf000) >> 12, (version & 0xf00) >> 8,
845 (version & 0xf0) >> 4, version & 0xf);
846
847
848 if (priv->ctrl.read_not_reliable)
849 goto read_not_reliable;
850
851 /* Check firmware version against what we downloaded. */
852 if (priv->firm_version != ((version & 0xf0) << 4 | (version & 0x0f))) {
853 if (!priv->ctrl.read_not_reliable) {
854 tuner_err("Incorrect readback of firmware version.\n");
855 goto fail;
856 } else {
857 tuner_err("Returned an incorrect version. However, read is not reliable enough. Ignoring it.\n");
858 hwmodel = 3028;
859 }
860 }
861
862 /* Check that the tuner hardware model remains consistent over time. */
863 if (priv->hwmodel == 0 && (hwmodel == 2028 || hwmodel == 3028)) {
864 priv->hwmodel = hwmodel;
865 priv->hwvers = version & 0xff00;
866 } else if (priv->hwmodel == 0 || priv->hwmodel != hwmodel ||
867 priv->hwvers != (version & 0xff00)) {
868 tuner_err("Read invalid device hardware information - tuner hung?\n");
869 goto fail;
870 }
871
872 read_not_reliable:
873 priv->cur_fw = new_fw;
874
875 /*
876 * By setting BASE in cur_fw.type only after successfully loading all
877 * firmwares, we can:
878 * 1. Identify that BASE firmware with type=0 has been loaded;
879 * 2. Tell whether BASE firmware was just changed the next time through.
880 */
881 priv->cur_fw.type |= BASE;
882 priv->state = XC2028_ACTIVE;
883
884 return 0;
885
886 fail:
887 free_firmware(priv);
888
889 if (retry_count < 8) {
890 msleep(50);
891 retry_count++;
892 tuner_dbg("Retrying firmware load\n");
893 goto retry;
894 }
895
896 /* Firmware didn't load. Put the device to sleep */
897 xc2028_sleep(fe);
898
899 if (rc == -ENOENT)
900 rc = -EINVAL;
901 return rc;
902 }
903
904 static int xc2028_signal(struct dvb_frontend *fe, u16 *strength)
905 {
906 struct xc2028_data *priv = fe->tuner_priv;
907 u16 frq_lock, signal = 0;
908 int rc, i;
909
910 tuner_dbg("%s called\n", __func__);
911
912 rc = check_device_status(priv);
913 if (rc < 0)
914 return rc;
915
916 /* If the device is sleeping, no channel is tuned */
917 if (!rc) {
918 *strength = 0;
919 return 0;
920 }
921
922 mutex_lock(&priv->lock);
923
924 /* Sync Lock Indicator */
925 for (i = 0; i < 3; i++) {
926 rc = xc2028_get_reg(priv, XREG_LOCK, &frq_lock);
927 if (rc < 0)
928 goto ret;
929
930 if (frq_lock)
931 break;
932 msleep(6);
933 }
934
935 /* Frequency didn't lock */
936 if (frq_lock == 2)
937 goto ret;
938
939 /* Get SNR of the video signal */
940 rc = xc2028_get_reg(priv, XREG_SNR, &signal);
941 if (rc < 0)
942 goto ret;
943
944 /* Signal level is 3 bits only */
945
946 signal = ((1 << 12) - 1) | ((signal & 0x07) << 12);
947
948 ret:
949 mutex_unlock(&priv->lock);
950
951 *strength = signal;
952
953 tuner_dbg("signal strength is %d\n", signal);
954
955 return rc;
956 }
957
958 static int xc2028_get_afc(struct dvb_frontend *fe, s32 *afc)
959 {
960 struct xc2028_data *priv = fe->tuner_priv;
961 int i, rc;
962 u16 frq_lock = 0;
963 s16 afc_reg = 0;
964
965 rc = check_device_status(priv);
966 if (rc < 0)
967 return rc;
968
969 /* If the device is sleeping, no channel is tuned */
970 if (!rc) {
971 *afc = 0;
972 return 0;
973 }
974
975 mutex_lock(&priv->lock);
976
977 /* Sync Lock Indicator */
978 for (i = 0; i < 3; i++) {
979 rc = xc2028_get_reg(priv, XREG_LOCK, &frq_lock);
980 if (rc < 0)
981 goto ret;
982
983 if (frq_lock)
984 break;
985 msleep(6);
986 }
987
988 /* Frequency didn't lock */
989 if (frq_lock == 2)
990 goto ret;
991
992 /* Get AFC */
993 rc = xc2028_get_reg(priv, XREG_FREQ_ERROR, &afc_reg);
994 if (rc < 0)
995 goto ret;
996
997 *afc = afc_reg * 15625; /* Hz */
998
999 tuner_dbg("AFC is %d Hz\n", *afc);
1000
1001 ret:
1002 mutex_unlock(&priv->lock);
1003
1004 return rc;
1005 }
1006
1007 #define DIV 15625
1008
1009 static int generic_set_freq(struct dvb_frontend *fe, u32 freq /* in HZ */,
1010 enum v4l2_tuner_type new_type,
1011 unsigned int type,
1012 v4l2_std_id std,
1013 u16 int_freq)
1014 {
1015 struct xc2028_data *priv = fe->tuner_priv;
1016 int rc = -EINVAL;
1017 unsigned char buf[4];
1018 u32 div, offset = 0;
1019
1020 tuner_dbg("%s called\n", __func__);
1021
1022 mutex_lock(&priv->lock);
1023
1024 tuner_dbg("should set frequency %d kHz\n", freq / 1000);
1025
1026 if (check_firmware(fe, type, std, int_freq) < 0)
1027 goto ret;
1028
1029 /* On some cases xc2028 can disable video output, if
1030 * very weak signals are received. By sending a soft
1031 * reset, this is re-enabled. So, it is better to always
1032 * send a soft reset before changing channels, to be sure
1033 * that xc2028 will be in a safe state.
1034 * Maybe this might also be needed for DTV.
1035 */
1036 switch (new_type) {
1037 case V4L2_TUNER_ANALOG_TV:
1038 rc = send_seq(priv, {0x00, 0x00});
1039
1040 /* Analog mode requires offset = 0 */
1041 break;
1042 case V4L2_TUNER_RADIO:
1043 /* Radio mode requires offset = 0 */
1044 break;
1045 case V4L2_TUNER_DIGITAL_TV:
1046 /*
1047 * Digital modes require an offset to adjust to the
1048 * proper frequency. The offset depends on what
1049 * firmware version is used.
1050 */
1051
1052 /*
1053 * Adjust to the center frequency. This is calculated by the
1054 * formula: offset = 1.25MHz - BW/2
1055 * For DTV 7/8, the firmware uses BW = 8000, so it needs a
1056 * further adjustment to get the frequency center on VHF
1057 */
1058
1059 /*
1060 * The firmware DTV78 used to work fine in UHF band (8 MHz
1061 * bandwidth) but not at all in VHF band (7 MHz bandwidth).
1062 * The real problem was connected to the formula used to
1063 * calculate the center frequency offset in VHF band.
1064 * In fact, removing the 500KHz adjustment fixed the problem.
1065 * This is coherent to what was implemented for the DTV7
1066 * firmware.
1067 * In the end, now the center frequency is the same for all 3
1068 * firmwares (DTV7, DTV8, DTV78) and doesn't depend on channel
1069 * bandwidth.
1070 */
1071
1072 if (priv->cur_fw.type & DTV6)
1073 offset = 1750000;
1074 else /* DTV7 or DTV8 or DTV78 */
1075 offset = 2750000;
1076
1077 /*
1078 * xc3028 additional "magic"
1079 * Depending on the firmware version, it needs some adjustments
1080 * to properly centralize the frequency. This seems to be
1081 * needed to compensate the SCODE table adjustments made by
1082 * newer firmwares
1083 */
1084
1085 /*
1086 * The proper adjustment would be to do it at s-code table.
1087 * However, this didn't work, as reported by
1088 * Robert Lowery <rglowery@exemail.com.au>
1089 */
1090
1091 #if 0
1092 /*
1093 * Still need tests for XC3028L (firmware 3.2 or upper)
1094 * So, for now, let's just comment the per-firmware
1095 * version of this change. Reports with xc3028l working
1096 * with and without the lines below are welcome
1097 */
1098
1099 if (priv->firm_version < 0x0302) {
1100 if (priv->cur_fw.type & DTV7)
1101 offset += 500000;
1102 } else {
1103 if (priv->cur_fw.type & DTV7)
1104 offset -= 300000;
1105 else if (type != ATSC) /* DVB @6MHz, DTV 8 and DTV 7/8 */
1106 offset += 200000;
1107 }
1108 #endif
1109 break;
1110 default:
1111 tuner_err("Unsupported tuner type %d.\n", new_type);
1112 break;
1113 }
1114
1115 div = (freq - offset + DIV / 2) / DIV;
1116
1117 /* CMD= Set frequency */
1118 if (priv->firm_version < 0x0202)
1119 rc = send_seq(priv, {0x00, XREG_RF_FREQ, 0x00, 0x00});
1120 else
1121 rc = send_seq(priv, {0x80, XREG_RF_FREQ, 0x00, 0x00});
1122 if (rc < 0)
1123 goto ret;
1124
1125 /* Return code shouldn't be checked.
1126 The reset CLK is needed only with tm6000.
1127 Driver should work fine even if this fails.
1128 */
1129 if (priv->ctrl.msleep)
1130 msleep(priv->ctrl.msleep);
1131 do_tuner_callback(fe, XC2028_RESET_CLK, 1);
1132
1133 msleep(10);
1134
1135 buf[0] = 0xff & (div >> 24);
1136 buf[1] = 0xff & (div >> 16);
1137 buf[2] = 0xff & (div >> 8);
1138 buf[3] = 0xff & (div);
1139
1140 rc = i2c_send(priv, buf, sizeof(buf));
1141 if (rc < 0)
1142 goto ret;
1143 msleep(100);
1144
1145 priv->frequency = freq;
1146
1147 tuner_dbg("divisor= %*ph (freq=%d.%03d)\n", 4, buf,
1148 freq / 1000000, (freq % 1000000) / 1000);
1149
1150 rc = 0;
1151
1152 ret:
1153 mutex_unlock(&priv->lock);
1154
1155 return rc;
1156 }
1157
1158 static int xc2028_set_analog_freq(struct dvb_frontend *fe,
1159 struct analog_parameters *p)
1160 {
1161 struct xc2028_data *priv = fe->tuner_priv;
1162 unsigned int type=0;
1163
1164 tuner_dbg("%s called\n", __func__);
1165
1166 if (p->mode == V4L2_TUNER_RADIO) {
1167 type |= FM;
1168 if (priv->ctrl.input1)
1169 type |= INPUT1;
1170 return generic_set_freq(fe, (625l * p->frequency) / 10,
1171 V4L2_TUNER_RADIO, type, 0, 0);
1172 }
1173
1174 /* if std is not defined, choose one */
1175 if (!p->std)
1176 p->std = V4L2_STD_MN;
1177
1178 /* PAL/M, PAL/N, PAL/Nc and NTSC variants should use 6MHz firmware */
1179 if (!(p->std & V4L2_STD_MN))
1180 type |= F8MHZ;
1181
1182 /* Add audio hack to std mask */
1183 p->std |= parse_audio_std_option();
1184
1185 return generic_set_freq(fe, 62500l * p->frequency,
1186 V4L2_TUNER_ANALOG_TV, type, p->std, 0);
1187 }
1188
1189 static int xc2028_set_params(struct dvb_frontend *fe)
1190 {
1191 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1192 u32 delsys = c->delivery_system;
1193 u32 bw = c->bandwidth_hz;
1194 struct xc2028_data *priv = fe->tuner_priv;
1195 int rc;
1196 unsigned int type = 0;
1197 u16 demod = 0;
1198
1199 tuner_dbg("%s called\n", __func__);
1200
1201 rc = check_device_status(priv);
1202 if (rc < 0)
1203 return rc;
1204
1205 switch (delsys) {
1206 case SYS_DVBT:
1207 case SYS_DVBT2:
1208 /*
1209 * The only countries with 6MHz seem to be Taiwan/Uruguay.
1210 * Both seem to require QAM firmware for OFDM decoding
1211 * Tested in Taiwan by Terry Wu <terrywu2009@gmail.com>
1212 */
1213 if (bw <= 6000000)
1214 type |= QAM;
1215
1216 switch (priv->ctrl.type) {
1217 case XC2028_D2633:
1218 type |= D2633;
1219 break;
1220 case XC2028_D2620:
1221 type |= D2620;
1222 break;
1223 case XC2028_AUTO:
1224 default:
1225 /* Zarlink seems to need D2633 */
1226 if (priv->ctrl.demod == XC3028_FE_ZARLINK456)
1227 type |= D2633;
1228 else
1229 type |= D2620;
1230 }
1231 break;
1232 case SYS_ATSC:
1233 /* The only ATSC firmware (at least on v2.7) is D2633 */
1234 type |= ATSC | D2633;
1235 break;
1236 /* DVB-S and pure QAM (FE_QAM) are not supported */
1237 default:
1238 return -EINVAL;
1239 }
1240
1241 if (bw <= 6000000) {
1242 type |= DTV6;
1243 priv->ctrl.vhfbw7 = 0;
1244 priv->ctrl.uhfbw8 = 0;
1245 } else if (bw <= 7000000) {
1246 if (c->frequency < 470000000)
1247 priv->ctrl.vhfbw7 = 1;
1248 else
1249 priv->ctrl.uhfbw8 = 0;
1250 type |= (priv->ctrl.vhfbw7 && priv->ctrl.uhfbw8) ? DTV78 : DTV7;
1251 type |= F8MHZ;
1252 } else {
1253 if (c->frequency < 470000000)
1254 priv->ctrl.vhfbw7 = 0;
1255 else
1256 priv->ctrl.uhfbw8 = 1;
1257 type |= (priv->ctrl.vhfbw7 && priv->ctrl.uhfbw8) ? DTV78 : DTV8;
1258 type |= F8MHZ;
1259 }
1260
1261 /* All S-code tables need a 200kHz shift */
1262 if (priv->ctrl.demod) {
1263 demod = priv->ctrl.demod;
1264
1265 /*
1266 * Newer firmwares require a 200 kHz offset only for ATSC
1267 */
1268 if (type == ATSC || priv->firm_version < 0x0302)
1269 demod += 200;
1270 /*
1271 * The DTV7 S-code table needs a 700 kHz shift.
1272 *
1273 * DTV7 is only used in Australia. Germany or Italy may also
1274 * use this firmware after initialization, but a tune to a UHF
1275 * channel should then cause DTV78 to be used.
1276 *
1277 * Unfortunately, on real-field tests, the s-code offset
1278 * didn't work as expected, as reported by
1279 * Robert Lowery <rglowery@exemail.com.au>
1280 */
1281 }
1282
1283 return generic_set_freq(fe, c->frequency,
1284 V4L2_TUNER_DIGITAL_TV, type, 0, demod);
1285 }
1286
1287 static int xc2028_sleep(struct dvb_frontend *fe)
1288 {
1289 struct xc2028_data *priv = fe->tuner_priv;
1290 int rc;
1291
1292 rc = check_device_status(priv);
1293 if (rc < 0)
1294 return rc;
1295
1296 /* Device is already in sleep mode */
1297 if (!rc)
1298 return 0;
1299
1300 /* Avoid firmware reload on slow devices or if PM disabled */
1301 if (no_poweroff || priv->ctrl.disable_power_mgmt)
1302 return 0;
1303
1304 tuner_dbg("Putting xc2028/3028 into poweroff mode.\n");
1305 if (debug > 1) {
1306 tuner_dbg("Printing sleep stack trace:\n");
1307 dump_stack();
1308 }
1309
1310 mutex_lock(&priv->lock);
1311
1312 if (priv->firm_version < 0x0202)
1313 rc = send_seq(priv, {0x00, XREG_POWER_DOWN, 0x00, 0x00});
1314 else
1315 rc = send_seq(priv, {0x80, XREG_POWER_DOWN, 0x00, 0x00});
1316
1317 if (rc >= 0)
1318 priv->state = XC2028_SLEEP;
1319
1320 mutex_unlock(&priv->lock);
1321
1322 return rc;
1323 }
1324
1325 static void xc2028_dvb_release(struct dvb_frontend *fe)
1326 {
1327 struct xc2028_data *priv = fe->tuner_priv;
1328
1329 tuner_dbg("%s called\n", __func__);
1330
1331 mutex_lock(&xc2028_list_mutex);
1332
1333 /* only perform final cleanup if this is the last instance */
1334 if (hybrid_tuner_report_instance_count(priv) == 1)
1335 free_firmware(priv);
1336
1337 if (priv)
1338 hybrid_tuner_release_state(priv);
1339
1340 mutex_unlock(&xc2028_list_mutex);
1341
1342 fe->tuner_priv = NULL;
1343 }
1344
1345 static int xc2028_get_frequency(struct dvb_frontend *fe, u32 *frequency)
1346 {
1347 struct xc2028_data *priv = fe->tuner_priv;
1348 int rc;
1349
1350 tuner_dbg("%s called\n", __func__);
1351
1352 rc = check_device_status(priv);
1353 if (rc < 0)
1354 return rc;
1355
1356 *frequency = priv->frequency;
1357
1358 return 0;
1359 }
1360
1361 static void load_firmware_cb(const struct firmware *fw,
1362 void *context)
1363 {
1364 struct dvb_frontend *fe = context;
1365 struct xc2028_data *priv = fe->tuner_priv;
1366 int rc;
1367
1368 tuner_dbg("request_firmware_nowait(): %s\n", fw ? "OK" : "error");
1369 if (!fw) {
1370 tuner_err("Could not load firmware %s.\n", priv->fname);
1371 priv->state = XC2028_NODEV;
1372 return;
1373 }
1374
1375 rc = load_all_firmwares(fe, fw);
1376
1377 release_firmware(fw);
1378
1379 if (rc < 0)
1380 return;
1381 priv->state = XC2028_ACTIVE;
1382 }
1383
1384 static int xc2028_set_config(struct dvb_frontend *fe, void *priv_cfg)
1385 {
1386 struct xc2028_data *priv = fe->tuner_priv;
1387 struct xc2028_ctrl *p = priv_cfg;
1388 int rc = 0;
1389
1390 tuner_dbg("%s called\n", __func__);
1391
1392 mutex_lock(&priv->lock);
1393
1394 /*
1395 * Copy the config data.
1396 */
1397 memcpy(&priv->ctrl, p, sizeof(priv->ctrl));
1398
1399 /*
1400 * If firmware name changed, frees firmware. As free_firmware will
1401 * reset the status to NO_FIRMWARE, this forces a new request_firmware
1402 */
1403 if (!firmware_name[0] && p->fname &&
1404 priv->fname && strcmp(p->fname, priv->fname))
1405 free_firmware(priv);
1406
1407 if (priv->ctrl.max_len < 9)
1408 priv->ctrl.max_len = 13;
1409
1410 if (priv->state == XC2028_NO_FIRMWARE) {
1411 if (!firmware_name[0])
1412 priv->fname = kstrdup(p->fname, GFP_KERNEL);
1413 else
1414 priv->fname = firmware_name;
1415
1416 if (!priv->fname) {
1417 rc = -ENOMEM;
1418 goto unlock;
1419 }
1420
1421 rc = request_firmware_nowait(THIS_MODULE, 1,
1422 priv->fname,
1423 priv->i2c_props.adap->dev.parent,
1424 GFP_KERNEL,
1425 fe, load_firmware_cb);
1426 if (rc < 0) {
1427 tuner_err("Failed to request firmware %s\n",
1428 priv->fname);
1429 priv->state = XC2028_NODEV;
1430 } else
1431 priv->state = XC2028_WAITING_FIRMWARE;
1432 }
1433 unlock:
1434 mutex_unlock(&priv->lock);
1435
1436 return rc;
1437 }
1438
1439 static const struct dvb_tuner_ops xc2028_dvb_tuner_ops = {
1440 .info = {
1441 .name = "Xceive XC3028",
1442 .frequency_min_hz = 42 * MHz,
1443 .frequency_max_hz = 864 * MHz,
1444 .frequency_step_hz = 50 * kHz,
1445 },
1446
1447 .set_config = xc2028_set_config,
1448 .set_analog_params = xc2028_set_analog_freq,
1449 .release = xc2028_dvb_release,
1450 .get_frequency = xc2028_get_frequency,
1451 .get_rf_strength = xc2028_signal,
1452 .get_afc = xc2028_get_afc,
1453 .set_params = xc2028_set_params,
1454 .sleep = xc2028_sleep,
1455 };
1456
1457 struct dvb_frontend *xc2028_attach(struct dvb_frontend *fe,
1458 struct xc2028_config *cfg)
1459 {
1460 struct xc2028_data *priv;
1461 int instance;
1462
1463 if (debug)
1464 printk(KERN_DEBUG "xc2028: Xcv2028/3028 init called!\n");
1465
1466 if (NULL == cfg)
1467 return NULL;
1468
1469 if (!fe) {
1470 printk(KERN_ERR "xc2028: No frontend!\n");
1471 return NULL;
1472 }
1473
1474 mutex_lock(&xc2028_list_mutex);
1475
1476 instance = hybrid_tuner_request_state(struct xc2028_data, priv,
1477 hybrid_tuner_instance_list,
1478 cfg->i2c_adap, cfg->i2c_addr,
1479 "xc2028");
1480 switch (instance) {
1481 case 0:
1482 /* memory allocation failure */
1483 goto fail;
1484 case 1:
1485 /* new tuner instance */
1486 priv->ctrl.max_len = 13;
1487
1488 mutex_init(&priv->lock);
1489
1490 fe->tuner_priv = priv;
1491 break;
1492 case 2:
1493 /* existing tuner instance */
1494 fe->tuner_priv = priv;
1495 break;
1496 }
1497
1498 memcpy(&fe->ops.tuner_ops, &xc2028_dvb_tuner_ops,
1499 sizeof(xc2028_dvb_tuner_ops));
1500
1501 tuner_info("type set to %s\n", "XCeive xc2028/xc3028 tuner");
1502
1503 if (cfg->ctrl)
1504 xc2028_set_config(fe, cfg->ctrl);
1505
1506 mutex_unlock(&xc2028_list_mutex);
1507
1508 return fe;
1509 fail:
1510 mutex_unlock(&xc2028_list_mutex);
1511
1512 xc2028_dvb_release(fe);
1513 return NULL;
1514 }
1515
1516 EXPORT_SYMBOL(xc2028_attach);
1517
1518 MODULE_DESCRIPTION("Xceive xc2028/xc3028 tuner driver");
1519 MODULE_AUTHOR("Michel Ludwig <michel.ludwig@gmail.com>");
1520 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@kernel.org>");
1521 MODULE_LICENSE("GPL v2");
1522 MODULE_FIRMWARE(XC2028_DEFAULT_FIRMWARE);
1523 MODULE_FIRMWARE(XC3028L_DEFAULT_FIRMWARE);
Linux with added FPC-III support