1 /*
2  * Driver for simple i2c audio chips.
3  *
4  * Copyright (c) 2000 Gerd Knorr
5  * based on code by:
6  *   Eric Sandeen (eric_sandeen@bigfoot.com)
7  *   Steve VanDeBogart (vandebo@uclink.berkeley.edu)
8  *   Greg Alexander (galexand@acm.org)
9  *
10  * For the TDA9875 part:
11  * Copyright (c) 2000 Guillaume Delvit based on Gerd Knorr source
12  * and Eric Sandeen
13  *
14  * Copyright(c) 2005-2008 Mauro Carvalho Chehab
15  *	- Some cleanups, code fixes, etc
16  *	- Convert it to V4L2 API
17  *
18  * This code is placed under the terms of the GNU General Public License
19  *
20  * OPTIONS:
21  *   debug - set to 1 if you'd like to see debug messages
22  *
23  */
24 
25 #include <linux/module.h>
26 #include <linux/kernel.h>
27 #include <linux/sched.h>
28 #include <linux/string.h>
29 #include <linux/timer.h>
30 #include <linux/delay.h>
31 #include <linux/errno.h>
32 #include <linux/slab.h>
33 #include <linux/videodev2.h>
34 #include <linux/i2c.h>
35 #include <linux/init.h>
36 #include <linux/kthread.h>
37 #include <linux/freezer.h>
38 
39 #include <media/i2c/tvaudio.h>
40 #include <media/v4l2-device.h>
41 #include <media/v4l2-ctrls.h>
42 
43 /* ---------------------------------------------------------------------- */
44 /* insmod args                                                            */
45 
46 static int debug;	/* insmod parameter */
47 module_param(debug, int, 0644);
48 
49 MODULE_DESCRIPTION("device driver for various i2c TV sound decoder / audiomux chips");
50 MODULE_AUTHOR("Eric Sandeen, Steve VanDeBogart, Greg Alexander, Gerd Knorr");
51 MODULE_LICENSE("GPL");
52 
53 #define UNSET    (-1U)
54 
55 /* ---------------------------------------------------------------------- */
56 /* our structs                                                            */
57 
58 #define MAXREGS 256
59 
60 struct CHIPSTATE;
61 typedef int  (*getvalue)(int);
62 typedef int  (*checkit)(struct CHIPSTATE*);
63 typedef int  (*initialize)(struct CHIPSTATE*);
64 typedef int  (*getrxsubchans)(struct CHIPSTATE *);
65 typedef void (*setaudmode)(struct CHIPSTATE*, int mode);
66 
67 /* i2c command */
68 typedef struct AUDIOCMD {
69 	int             count;             /* # of bytes to send */
70 	unsigned char   bytes[MAXREGS+1];  /* addr, data, data, ... */
71 } audiocmd;
72 
73 /* chip description */
74 struct CHIPDESC {
75 	char       *name;             /* chip name         */
76 	int        addr_lo, addr_hi;  /* i2c address range */
77 	int        registers;         /* # of registers    */
78 
79 	int        *insmodopt;
80 	checkit    checkit;
81 	initialize initialize;
82 	int        flags;
83 #define CHIP_HAS_VOLUME      1
84 #define CHIP_HAS_BASSTREBLE  2
85 #define CHIP_HAS_INPUTSEL    4
86 #define CHIP_NEED_CHECKMODE  8
87 
88 	/* various i2c command sequences */
89 	audiocmd   init;
90 
91 	/* which register has which value */
92 	int    leftreg, rightreg, treblereg, bassreg;
93 
94 	/* initialize with (defaults to 65535/32768/32768 */
95 	int    volinit, trebleinit, bassinit;
96 
97 	/* functions to convert the values (v4l -> chip) */
98 	getvalue volfunc, treblefunc, bassfunc;
99 
100 	/* get/set mode */
101 	getrxsubchans	getrxsubchans;
102 	setaudmode	setaudmode;
103 
104 	/* input switch register + values for v4l inputs */
105 	int  inputreg;
106 	int  inputmap[4];
107 	int  inputmute;
108 	int  inputmask;
109 };
110 
111 /* current state of the chip */
112 struct CHIPSTATE {
113 	struct v4l2_subdev sd;
114 	struct v4l2_ctrl_handler hdl;
115 	struct {
116 		/* volume/balance cluster */
117 		struct v4l2_ctrl *volume;
118 		struct v4l2_ctrl *balance;
119 	};
120 
121 	/* chip-specific description - should point to
122 	   an entry at CHIPDESC table */
123 	struct CHIPDESC *desc;
124 
125 	/* shadow register set */
126 	audiocmd   shadow;
127 
128 	/* current settings */
129 	u16 muted;
130 	int prevmode;
131 	int radio;
132 	int input;
133 
134 	/* thread */
135 	struct task_struct   *thread;
136 	struct timer_list    wt;
137 	int		     audmode;
138 };
139 
to_state(struct v4l2_subdev * sd)140 static inline struct CHIPSTATE *to_state(struct v4l2_subdev *sd)
141 {
142 	return container_of(sd, struct CHIPSTATE, sd);
143 }
144 
to_sd(struct v4l2_ctrl * ctrl)145 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
146 {
147 	return &container_of(ctrl->handler, struct CHIPSTATE, hdl)->sd;
148 }
149 
150 
151 /* ---------------------------------------------------------------------- */
152 /* i2c I/O functions                                                      */
153 
chip_write(struct CHIPSTATE * chip,int subaddr,int val)154 static int chip_write(struct CHIPSTATE *chip, int subaddr, int val)
155 {
156 	struct v4l2_subdev *sd = &chip->sd;
157 	struct i2c_client *c = v4l2_get_subdevdata(sd);
158 	unsigned char buffer[2];
159 	int rc;
160 
161 	if (subaddr < 0) {
162 		v4l2_dbg(1, debug, sd, "chip_write: 0x%x\n", val);
163 		chip->shadow.bytes[1] = val;
164 		buffer[0] = val;
165 		rc = i2c_master_send(c, buffer, 1);
166 		if (rc != 1) {
167 			v4l2_warn(sd, "I/O error (write 0x%x)\n", val);
168 			if (rc < 0)
169 				return rc;
170 			return -EIO;
171 		}
172 	} else {
173 		if (subaddr + 1 >= ARRAY_SIZE(chip->shadow.bytes)) {
174 			v4l2_info(sd,
175 				"Tried to access a non-existent register: %d\n",
176 				subaddr);
177 			return -EINVAL;
178 		}
179 
180 		v4l2_dbg(1, debug, sd, "chip_write: reg%d=0x%x\n",
181 			subaddr, val);
182 		chip->shadow.bytes[subaddr+1] = val;
183 		buffer[0] = subaddr;
184 		buffer[1] = val;
185 		rc = i2c_master_send(c, buffer, 2);
186 		if (rc != 2) {
187 			v4l2_warn(sd, "I/O error (write reg%d=0x%x)\n",
188 				subaddr, val);
189 			if (rc < 0)
190 				return rc;
191 			return -EIO;
192 		}
193 	}
194 	return 0;
195 }
196 
chip_write_masked(struct CHIPSTATE * chip,int subaddr,int val,int mask)197 static int chip_write_masked(struct CHIPSTATE *chip,
198 			     int subaddr, int val, int mask)
199 {
200 	struct v4l2_subdev *sd = &chip->sd;
201 
202 	if (mask != 0) {
203 		if (subaddr < 0) {
204 			val = (chip->shadow.bytes[1] & ~mask) | (val & mask);
205 		} else {
206 			if (subaddr + 1 >= ARRAY_SIZE(chip->shadow.bytes)) {
207 				v4l2_info(sd,
208 					"Tried to access a non-existent register: %d\n",
209 					subaddr);
210 				return -EINVAL;
211 			}
212 
213 			val = (chip->shadow.bytes[subaddr+1] & ~mask) | (val & mask);
214 		}
215 	}
216 	return chip_write(chip, subaddr, val);
217 }
218 
chip_read(struct CHIPSTATE * chip)219 static int chip_read(struct CHIPSTATE *chip)
220 {
221 	struct v4l2_subdev *sd = &chip->sd;
222 	struct i2c_client *c = v4l2_get_subdevdata(sd);
223 	unsigned char buffer;
224 	int rc;
225 
226 	rc = i2c_master_recv(c, &buffer, 1);
227 	if (rc != 1) {
228 		v4l2_warn(sd, "I/O error (read)\n");
229 		if (rc < 0)
230 			return rc;
231 		return -EIO;
232 	}
233 	v4l2_dbg(1, debug, sd, "chip_read: 0x%x\n", buffer);
234 	return buffer;
235 }
236 
chip_read2(struct CHIPSTATE * chip,int subaddr)237 static int chip_read2(struct CHIPSTATE *chip, int subaddr)
238 {
239 	struct v4l2_subdev *sd = &chip->sd;
240 	struct i2c_client *c = v4l2_get_subdevdata(sd);
241 	int rc;
242 	unsigned char write[1];
243 	unsigned char read[1];
244 	struct i2c_msg msgs[2] = {
245 		{
246 			.addr = c->addr,
247 			.len = 1,
248 			.buf = write
249 		},
250 		{
251 			.addr = c->addr,
252 			.flags = I2C_M_RD,
253 			.len = 1,
254 			.buf = read
255 		}
256 	};
257 
258 	write[0] = subaddr;
259 
260 	rc = i2c_transfer(c->adapter, msgs, 2);
261 	if (rc != 2) {
262 		v4l2_warn(sd, "I/O error (read2)\n");
263 		if (rc < 0)
264 			return rc;
265 		return -EIO;
266 	}
267 	v4l2_dbg(1, debug, sd, "chip_read2: reg%d=0x%x\n",
268 		subaddr, read[0]);
269 	return read[0];
270 }
271 
chip_cmd(struct CHIPSTATE * chip,char * name,audiocmd * cmd)272 static int chip_cmd(struct CHIPSTATE *chip, char *name, audiocmd *cmd)
273 {
274 	struct v4l2_subdev *sd = &chip->sd;
275 	struct i2c_client *c = v4l2_get_subdevdata(sd);
276 	int i, rc;
277 
278 	if (0 == cmd->count)
279 		return 0;
280 
281 	if (cmd->count + cmd->bytes[0] - 1 >= ARRAY_SIZE(chip->shadow.bytes)) {
282 		v4l2_info(sd,
283 			 "Tried to access a non-existent register range: %d to %d\n",
284 			 cmd->bytes[0] + 1, cmd->bytes[0] + cmd->count - 1);
285 		return -EINVAL;
286 	}
287 
288 	/* FIXME: it seems that the shadow bytes are wrong below !*/
289 
290 	/* update our shadow register set; print bytes if (debug > 0) */
291 	v4l2_dbg(1, debug, sd, "chip_cmd(%s): reg=%d, data:",
292 		name, cmd->bytes[0]);
293 	for (i = 1; i < cmd->count; i++) {
294 		if (debug)
295 			printk(KERN_CONT " 0x%x", cmd->bytes[i]);
296 		chip->shadow.bytes[i+cmd->bytes[0]] = cmd->bytes[i];
297 	}
298 	if (debug)
299 		printk(KERN_CONT "\n");
300 
301 	/* send data to the chip */
302 	rc = i2c_master_send(c, cmd->bytes, cmd->count);
303 	if (rc != cmd->count) {
304 		v4l2_warn(sd, "I/O error (%s)\n", name);
305 		if (rc < 0)
306 			return rc;
307 		return -EIO;
308 	}
309 	return 0;
310 }
311 
312 /* ---------------------------------------------------------------------- */
313 /* kernel thread for doing i2c stuff asyncronly
314  *   right now it is used only to check the audio mode (mono/stereo/whatever)
315  *   some time after switching to another TV channel, then turn on stereo
316  *   if available, ...
317  */
318 
chip_thread_wake(struct timer_list * t)319 static void chip_thread_wake(struct timer_list *t)
320 {
321 	struct CHIPSTATE *chip = from_timer(chip, t, wt);
322 	wake_up_process(chip->thread);
323 }
324 
chip_thread(void * data)325 static int chip_thread(void *data)
326 {
327 	struct CHIPSTATE *chip = data;
328 	struct CHIPDESC  *desc = chip->desc;
329 	struct v4l2_subdev *sd = &chip->sd;
330 	int mode, selected;
331 
332 	v4l2_dbg(1, debug, sd, "thread started\n");
333 	set_freezable();
334 	for (;;) {
335 		set_current_state(TASK_INTERRUPTIBLE);
336 		if (!kthread_should_stop())
337 			schedule();
338 		set_current_state(TASK_RUNNING);
339 		try_to_freeze();
340 		if (kthread_should_stop())
341 			break;
342 		v4l2_dbg(1, debug, sd, "thread wakeup\n");
343 
344 		/* don't do anything for radio */
345 		if (chip->radio)
346 			continue;
347 
348 		/* have a look what's going on */
349 		mode = desc->getrxsubchans(chip);
350 		if (mode == chip->prevmode)
351 			continue;
352 
353 		/* chip detected a new audio mode - set it */
354 		v4l2_dbg(1, debug, sd, "thread checkmode\n");
355 
356 		chip->prevmode = mode;
357 
358 		selected = V4L2_TUNER_MODE_MONO;
359 		switch (chip->audmode) {
360 		case V4L2_TUNER_MODE_MONO:
361 			if (mode & V4L2_TUNER_SUB_LANG1)
362 				selected = V4L2_TUNER_MODE_LANG1;
363 			break;
364 		case V4L2_TUNER_MODE_STEREO:
365 		case V4L2_TUNER_MODE_LANG1:
366 			if (mode & V4L2_TUNER_SUB_LANG1)
367 				selected = V4L2_TUNER_MODE_LANG1;
368 			else if (mode & V4L2_TUNER_SUB_STEREO)
369 				selected = V4L2_TUNER_MODE_STEREO;
370 			break;
371 		case V4L2_TUNER_MODE_LANG2:
372 			if (mode & V4L2_TUNER_SUB_LANG2)
373 				selected = V4L2_TUNER_MODE_LANG2;
374 			else if (mode & V4L2_TUNER_SUB_STEREO)
375 				selected = V4L2_TUNER_MODE_STEREO;
376 			break;
377 		case V4L2_TUNER_MODE_LANG1_LANG2:
378 			if (mode & V4L2_TUNER_SUB_LANG2)
379 				selected = V4L2_TUNER_MODE_LANG1_LANG2;
380 			else if (mode & V4L2_TUNER_SUB_STEREO)
381 				selected = V4L2_TUNER_MODE_STEREO;
382 		}
383 		desc->setaudmode(chip, selected);
384 
385 		/* schedule next check */
386 		mod_timer(&chip->wt, jiffies+msecs_to_jiffies(2000));
387 	}
388 
389 	v4l2_dbg(1, debug, sd, "thread exiting\n");
390 	return 0;
391 }
392 
393 /* ---------------------------------------------------------------------- */
394 /* audio chip descriptions - defines+functions for tda9840                */
395 
396 #define TDA9840_SW         0x00
397 #define TDA9840_LVADJ      0x02
398 #define TDA9840_STADJ      0x03
399 #define TDA9840_TEST       0x04
400 
401 #define TDA9840_MONO       0x10
402 #define TDA9840_STEREO     0x2a
403 #define TDA9840_DUALA      0x12
404 #define TDA9840_DUALB      0x1e
405 #define TDA9840_DUALAB     0x1a
406 #define TDA9840_DUALBA     0x16
407 #define TDA9840_EXTERNAL   0x7a
408 
409 #define TDA9840_DS_DUAL    0x20 /* Dual sound identified          */
410 #define TDA9840_ST_STEREO  0x40 /* Stereo sound identified        */
411 #define TDA9840_PONRES     0x80 /* Power-on reset detected if = 1 */
412 
413 #define TDA9840_TEST_INT1SN 0x1 /* Integration time 0.5s when set */
414 #define TDA9840_TEST_INTFU 0x02 /* Disables integrator function */
415 
tda9840_getrxsubchans(struct CHIPSTATE * chip)416 static int tda9840_getrxsubchans(struct CHIPSTATE *chip)
417 {
418 	struct v4l2_subdev *sd = &chip->sd;
419 	int val, mode;
420 
421 	mode = V4L2_TUNER_SUB_MONO;
422 
423 	val = chip_read(chip);
424 	if (val < 0)
425 		return mode;
426 
427 	if (val & TDA9840_DS_DUAL)
428 		mode |= V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
429 	if (val & TDA9840_ST_STEREO)
430 		mode = V4L2_TUNER_SUB_STEREO;
431 
432 	v4l2_dbg(1, debug, sd,
433 		"tda9840_getrxsubchans(): raw chip read: %d, return: %d\n",
434 		val, mode);
435 	return mode;
436 }
437 
tda9840_setaudmode(struct CHIPSTATE * chip,int mode)438 static void tda9840_setaudmode(struct CHIPSTATE *chip, int mode)
439 {
440 	int update = 1;
441 	int t = chip->shadow.bytes[TDA9840_SW + 1] & ~0x7e;
442 
443 	switch (mode) {
444 	case V4L2_TUNER_MODE_MONO:
445 		t |= TDA9840_MONO;
446 		break;
447 	case V4L2_TUNER_MODE_STEREO:
448 		t |= TDA9840_STEREO;
449 		break;
450 	case V4L2_TUNER_MODE_LANG1:
451 		t |= TDA9840_DUALA;
452 		break;
453 	case V4L2_TUNER_MODE_LANG2:
454 		t |= TDA9840_DUALB;
455 		break;
456 	case V4L2_TUNER_MODE_LANG1_LANG2:
457 		t |= TDA9840_DUALAB;
458 		break;
459 	default:
460 		update = 0;
461 	}
462 
463 	if (update)
464 		chip_write(chip, TDA9840_SW, t);
465 }
466 
tda9840_checkit(struct CHIPSTATE * chip)467 static int tda9840_checkit(struct CHIPSTATE *chip)
468 {
469 	int rc;
470 
471 	rc = chip_read(chip);
472 	if (rc < 0)
473 		return 0;
474 
475 
476 	/* lower 5 bits should be 0 */
477 	return ((rc & 0x1f) == 0) ? 1 : 0;
478 }
479 
480 /* ---------------------------------------------------------------------- */
481 /* audio chip descriptions - defines+functions for tda985x                */
482 
483 /* subaddresses for TDA9855 */
484 #define TDA9855_VR	0x00 /* Volume, right */
485 #define TDA9855_VL	0x01 /* Volume, left */
486 #define TDA9855_BA	0x02 /* Bass */
487 #define TDA9855_TR	0x03 /* Treble */
488 #define TDA9855_SW	0x04 /* Subwoofer - not connected on DTV2000 */
489 
490 /* subaddresses for TDA9850 */
491 #define TDA9850_C4	0x04 /* Control 1 for TDA9850 */
492 
493 /* subaddesses for both chips */
494 #define TDA985x_C5	0x05 /* Control 2 for TDA9850, Control 1 for TDA9855 */
495 #define TDA985x_C6	0x06 /* Control 3 for TDA9850, Control 2 for TDA9855 */
496 #define TDA985x_C7	0x07 /* Control 4 for TDA9850, Control 3 for TDA9855 */
497 #define TDA985x_A1	0x08 /* Alignment 1 for both chips */
498 #define TDA985x_A2	0x09 /* Alignment 2 for both chips */
499 #define TDA985x_A3	0x0a /* Alignment 3 for both chips */
500 
501 /* Masks for bits in TDA9855 subaddresses */
502 /* 0x00 - VR in TDA9855 */
503 /* 0x01 - VL in TDA9855 */
504 /* lower 7 bits control gain from -71dB (0x28) to 16dB (0x7f)
505  * in 1dB steps - mute is 0x27 */
506 
507 
508 /* 0x02 - BA in TDA9855 */
509 /* lower 5 bits control bass gain from -12dB (0x06) to 16.5dB (0x19)
510  * in .5dB steps - 0 is 0x0E */
511 
512 
513 /* 0x03 - TR in TDA9855 */
514 /* 4 bits << 1 control treble gain from -12dB (0x3) to 12dB (0xb)
515  * in 3dB steps - 0 is 0x7 */
516 
517 /* Masks for bits in both chips' subaddresses */
518 /* 0x04 - SW in TDA9855, C4/Control 1 in TDA9850 */
519 /* Unique to TDA9855: */
520 /* 4 bits << 2 control subwoofer/surround gain from -14db (0x1) to 14db (0xf)
521  * in 3dB steps - mute is 0x0 */
522 
523 /* Unique to TDA9850: */
524 /* lower 4 bits control stereo noise threshold, over which stereo turns off
525  * set to values of 0x00 through 0x0f for Ster1 through Ster16 */
526 
527 
528 /* 0x05 - C5 - Control 1 in TDA9855 , Control 2 in TDA9850*/
529 /* Unique to TDA9855: */
530 #define TDA9855_MUTE	1<<7 /* GMU, Mute at outputs */
531 #define TDA9855_AVL	1<<6 /* AVL, Automatic Volume Level */
532 #define TDA9855_LOUD	1<<5 /* Loudness, 1==off */
533 #define TDA9855_SUR	1<<3 /* Surround / Subwoofer 1==.5(L-R) 0==.5(L+R) */
534 			     /* Bits 0 to 3 select various combinations
535 			      * of line in and line out, only the
536 			      * interesting ones are defined */
537 #define TDA9855_EXT	1<<2 /* Selects inputs LIR and LIL.  Pins 41 & 12 */
538 #define TDA9855_INT	0    /* Selects inputs LOR and LOL.  (internal) */
539 
540 /* Unique to TDA9850:  */
541 /* lower 4 bits control SAP noise threshold, over which SAP turns off
542  * set to values of 0x00 through 0x0f for SAP1 through SAP16 */
543 
544 
545 /* 0x06 - C6 - Control 2 in TDA9855, Control 3 in TDA9850 */
546 /* Common to TDA9855 and TDA9850: */
547 #define TDA985x_SAP	3<<6 /* Selects SAP output, mute if not received */
548 #define TDA985x_MONOSAP	2<<6 /* Selects Mono on left, SAP on right */
549 #define TDA985x_STEREO	1<<6 /* Selects Stereo output, mono if not received */
550 #define TDA985x_MONO	0    /* Forces Mono output */
551 #define TDA985x_LMU	1<<3 /* Mute (LOR/LOL for 9855, OUTL/OUTR for 9850) */
552 
553 /* Unique to TDA9855: */
554 #define TDA9855_TZCM	1<<5 /* If set, don't mute till zero crossing */
555 #define TDA9855_VZCM	1<<4 /* If set, don't change volume till zero crossing*/
556 #define TDA9855_LINEAR	0    /* Linear Stereo */
557 #define TDA9855_PSEUDO	1    /* Pseudo Stereo */
558 #define TDA9855_SPAT_30	2    /* Spatial Stereo, 30% anti-phase crosstalk */
559 #define TDA9855_SPAT_50	3    /* Spatial Stereo, 52% anti-phase crosstalk */
560 #define TDA9855_E_MONO	7    /* Forced mono - mono select elseware, so useless*/
561 
562 /* 0x07 - C7 - Control 3 in TDA9855, Control 4 in TDA9850 */
563 /* Common to both TDA9855 and TDA9850: */
564 /* lower 4 bits control input gain from -3.5dB (0x0) to 4dB (0xF)
565  * in .5dB steps -  0dB is 0x7 */
566 
567 /* 0x08, 0x09 - A1 and A2 (read/write) */
568 /* Common to both TDA9855 and TDA9850: */
569 /* lower 5 bites are wideband and spectral expander alignment
570  * from 0x00 to 0x1f - nominal at 0x0f and 0x10 (read/write) */
571 #define TDA985x_STP	1<<5 /* Stereo Pilot/detect (read-only) */
572 #define TDA985x_SAPP	1<<6 /* SAP Pilot/detect (read-only) */
573 #define TDA985x_STS	1<<7 /* Stereo trigger 1= <35mV 0= <30mV (write-only)*/
574 
575 /* 0x0a - A3 */
576 /* Common to both TDA9855 and TDA9850: */
577 /* lower 3 bits control timing current for alignment: -30% (0x0), -20% (0x1),
578  * -10% (0x2), nominal (0x3), +10% (0x6), +20% (0x5), +30% (0x4) */
579 #define TDA985x_ADJ	1<<7 /* Stereo adjust on/off (wideband and spectral */
580 
tda9855_volume(int val)581 static int tda9855_volume(int val) { return val/0x2e8+0x27; }
tda9855_bass(int val)582 static int tda9855_bass(int val)   { return val/0xccc+0x06; }
tda9855_treble(int val)583 static int tda9855_treble(int val) { return (val/0x1c71+0x3)<<1; }
584 
tda985x_getrxsubchans(struct CHIPSTATE * chip)585 static int  tda985x_getrxsubchans(struct CHIPSTATE *chip)
586 {
587 	int mode, val;
588 
589 	/* Add mono mode regardless of SAP and stereo */
590 	/* Allows forced mono */
591 	mode = V4L2_TUNER_SUB_MONO;
592 	val = chip_read(chip);
593 	if (val < 0)
594 		return mode;
595 
596 	if (val & TDA985x_STP)
597 		mode = V4L2_TUNER_SUB_STEREO;
598 	if (val & TDA985x_SAPP)
599 		mode |= V4L2_TUNER_SUB_SAP;
600 	return mode;
601 }
602 
tda985x_setaudmode(struct CHIPSTATE * chip,int mode)603 static void tda985x_setaudmode(struct CHIPSTATE *chip, int mode)
604 {
605 	int update = 1;
606 	int c6 = chip->shadow.bytes[TDA985x_C6+1] & 0x3f;
607 
608 	switch (mode) {
609 	case V4L2_TUNER_MODE_MONO:
610 		c6 |= TDA985x_MONO;
611 		break;
612 	case V4L2_TUNER_MODE_STEREO:
613 	case V4L2_TUNER_MODE_LANG1:
614 		c6 |= TDA985x_STEREO;
615 		break;
616 	case V4L2_TUNER_MODE_SAP:
617 		c6 |= TDA985x_SAP;
618 		break;
619 	case V4L2_TUNER_MODE_LANG1_LANG2:
620 		c6 |= TDA985x_MONOSAP;
621 		break;
622 	default:
623 		update = 0;
624 	}
625 	if (update)
626 		chip_write(chip,TDA985x_C6,c6);
627 }
628 
629 
630 /* ---------------------------------------------------------------------- */
631 /* audio chip descriptions - defines+functions for tda9873h               */
632 
633 /* Subaddresses for TDA9873H */
634 
635 #define TDA9873_SW	0x00 /* Switching                    */
636 #define TDA9873_AD	0x01 /* Adjust                       */
637 #define TDA9873_PT	0x02 /* Port                         */
638 
639 /* Subaddress 0x00: Switching Data
640  * B7..B0:
641  *
642  * B1, B0: Input source selection
643  *  0,  0  internal
644  *  1,  0  external stereo
645  *  0,  1  external mono
646  */
647 #define TDA9873_INP_MASK    3
648 #define TDA9873_INTERNAL    0
649 #define TDA9873_EXT_STEREO  2
650 #define TDA9873_EXT_MONO    1
651 
652 /*    B3, B2: output signal select
653  * B4    : transmission mode
654  *  0, 0, 1   Mono
655  *  1, 0, 0   Stereo
656  *  1, 1, 1   Stereo (reversed channel)
657  *  0, 0, 0   Dual AB
658  *  0, 0, 1   Dual AA
659  *  0, 1, 0   Dual BB
660  *  0, 1, 1   Dual BA
661  */
662 
663 #define TDA9873_TR_MASK     (7 << 2)
664 #define TDA9873_TR_MONO     4
665 #define TDA9873_TR_STEREO   1 << 4
666 #define TDA9873_TR_REVERSE  ((1 << 3) | (1 << 2))
667 #define TDA9873_TR_DUALA    1 << 2
668 #define TDA9873_TR_DUALB    1 << 3
669 #define TDA9873_TR_DUALAB   0
670 
671 /* output level controls
672  * B5:  output level switch (0 = reduced gain, 1 = normal gain)
673  * B6:  mute                (1 = muted)
674  * B7:  auto-mute           (1 = auto-mute enabled)
675  */
676 
677 #define TDA9873_GAIN_NORMAL 1 << 5
678 #define TDA9873_MUTE        1 << 6
679 #define TDA9873_AUTOMUTE    1 << 7
680 
681 /* Subaddress 0x01:  Adjust/standard */
682 
683 /* Lower 4 bits (C3..C0) control stereo adjustment on R channel (-0.6 - +0.7 dB)
684  * Recommended value is +0 dB
685  */
686 
687 #define	TDA9873_STEREO_ADJ	0x06 /* 0dB gain */
688 
689 /* Bits C6..C4 control FM stantard
690  * C6, C5, C4
691  *  0,  0,  0   B/G (PAL FM)
692  *  0,  0,  1   M
693  *  0,  1,  0   D/K(1)
694  *  0,  1,  1   D/K(2)
695  *  1,  0,  0   D/K(3)
696  *  1,  0,  1   I
697  */
698 #define TDA9873_BG		0
699 #define TDA9873_M       1
700 #define TDA9873_DK1     2
701 #define TDA9873_DK2     3
702 #define TDA9873_DK3     4
703 #define TDA9873_I       5
704 
705 /* C7 controls identification response time (1=fast/0=normal)
706  */
707 #define TDA9873_IDR_NORM 0
708 #define TDA9873_IDR_FAST 1 << 7
709 
710 
711 /* Subaddress 0x02: Port data */
712 
713 /* E1, E0   free programmable ports P1/P2
714     0,  0   both ports low
715     0,  1   P1 high
716     1,  0   P2 high
717     1,  1   both ports high
718 */
719 
720 #define TDA9873_PORTS    3
721 
722 /* E2: test port */
723 #define TDA9873_TST_PORT 1 << 2
724 
725 /* E5..E3 control mono output channel (together with transmission mode bit B4)
726  *
727  * E5 E4 E3 B4     OUTM
728  *  0  0  0  0     mono
729  *  0  0  1  0     DUAL B
730  *  0  1  0  1     mono (from stereo decoder)
731  */
732 #define TDA9873_MOUT_MONO   0
733 #define TDA9873_MOUT_FMONO  0
734 #define TDA9873_MOUT_DUALA  0
735 #define TDA9873_MOUT_DUALB  1 << 3
736 #define TDA9873_MOUT_ST     1 << 4
737 #define TDA9873_MOUT_EXTM   ((1 << 4) | (1 << 3))
738 #define TDA9873_MOUT_EXTL   1 << 5
739 #define TDA9873_MOUT_EXTR   ((1 << 5) | (1 << 3))
740 #define TDA9873_MOUT_EXTLR  ((1 << 5) | (1 << 4))
741 #define TDA9873_MOUT_MUTE   ((1 << 5) | (1 << 4) | (1 << 3))
742 
743 /* Status bits: (chip read) */
744 #define TDA9873_PONR        0 /* Power-on reset detected if = 1 */
745 #define TDA9873_STEREO      2 /* Stereo sound is identified     */
746 #define TDA9873_DUAL        4 /* Dual sound is identified       */
747 
tda9873_getrxsubchans(struct CHIPSTATE * chip)748 static int tda9873_getrxsubchans(struct CHIPSTATE *chip)
749 {
750 	struct v4l2_subdev *sd = &chip->sd;
751 	int val,mode;
752 
753 	mode = V4L2_TUNER_SUB_MONO;
754 
755 	val = chip_read(chip);
756 	if (val < 0)
757 		return mode;
758 
759 	if (val & TDA9873_STEREO)
760 		mode = V4L2_TUNER_SUB_STEREO;
761 	if (val & TDA9873_DUAL)
762 		mode |= V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
763 	v4l2_dbg(1, debug, sd,
764 		"tda9873_getrxsubchans(): raw chip read: %d, return: %d\n",
765 		val, mode);
766 	return mode;
767 }
768 
tda9873_setaudmode(struct CHIPSTATE * chip,int mode)769 static void tda9873_setaudmode(struct CHIPSTATE *chip, int mode)
770 {
771 	struct v4l2_subdev *sd = &chip->sd;
772 	int sw_data  = chip->shadow.bytes[TDA9873_SW+1] & ~ TDA9873_TR_MASK;
773 	/*	int adj_data = chip->shadow.bytes[TDA9873_AD+1] ; */
774 
775 	if ((sw_data & TDA9873_INP_MASK) != TDA9873_INTERNAL) {
776 		v4l2_dbg(1, debug, sd,
777 			 "tda9873_setaudmode(): external input\n");
778 		return;
779 	}
780 
781 	v4l2_dbg(1, debug, sd,
782 		 "tda9873_setaudmode(): chip->shadow.bytes[%d] = %d\n",
783 		 TDA9873_SW+1, chip->shadow.bytes[TDA9873_SW+1]);
784 	v4l2_dbg(1, debug, sd, "tda9873_setaudmode(): sw_data  = %d\n",
785 		 sw_data);
786 
787 	switch (mode) {
788 	case V4L2_TUNER_MODE_MONO:
789 		sw_data |= TDA9873_TR_MONO;
790 		break;
791 	case V4L2_TUNER_MODE_STEREO:
792 		sw_data |= TDA9873_TR_STEREO;
793 		break;
794 	case V4L2_TUNER_MODE_LANG1:
795 		sw_data |= TDA9873_TR_DUALA;
796 		break;
797 	case V4L2_TUNER_MODE_LANG2:
798 		sw_data |= TDA9873_TR_DUALB;
799 		break;
800 	case V4L2_TUNER_MODE_LANG1_LANG2:
801 		sw_data |= TDA9873_TR_DUALAB;
802 		break;
803 	default:
804 		return;
805 	}
806 
807 	chip_write(chip, TDA9873_SW, sw_data);
808 	v4l2_dbg(1, debug, sd,
809 		"tda9873_setaudmode(): req. mode %d; chip_write: %d\n",
810 		mode, sw_data);
811 }
812 
tda9873_checkit(struct CHIPSTATE * chip)813 static int tda9873_checkit(struct CHIPSTATE *chip)
814 {
815 	int rc;
816 
817 	rc = chip_read2(chip, 254);
818 	if (rc < 0)
819 		return 0;
820 	return (rc & ~0x1f) == 0x80;
821 }
822 
823 
824 /* ---------------------------------------------------------------------- */
825 /* audio chip description - defines+functions for tda9874h and tda9874a   */
826 /* Dariusz Kowalewski <darekk@automex.pl>                                 */
827 
828 /* Subaddresses for TDA9874H and TDA9874A (slave rx) */
829 #define TDA9874A_AGCGR		0x00	/* AGC gain */
830 #define TDA9874A_GCONR		0x01	/* general config */
831 #define TDA9874A_MSR		0x02	/* monitor select */
832 #define TDA9874A_C1FRA		0x03	/* carrier 1 freq. */
833 #define TDA9874A_C1FRB		0x04	/* carrier 1 freq. */
834 #define TDA9874A_C1FRC		0x05	/* carrier 1 freq. */
835 #define TDA9874A_C2FRA		0x06	/* carrier 2 freq. */
836 #define TDA9874A_C2FRB		0x07	/* carrier 2 freq. */
837 #define TDA9874A_C2FRC		0x08	/* carrier 2 freq. */
838 #define TDA9874A_DCR		0x09	/* demodulator config */
839 #define TDA9874A_FMER		0x0a	/* FM de-emphasis */
840 #define TDA9874A_FMMR		0x0b	/* FM dematrix */
841 #define TDA9874A_C1OLAR		0x0c	/* ch.1 output level adj. */
842 #define TDA9874A_C2OLAR		0x0d	/* ch.2 output level adj. */
843 #define TDA9874A_NCONR		0x0e	/* NICAM config */
844 #define TDA9874A_NOLAR		0x0f	/* NICAM output level adj. */
845 #define TDA9874A_NLELR		0x10	/* NICAM lower error limit */
846 #define TDA9874A_NUELR		0x11	/* NICAM upper error limit */
847 #define TDA9874A_AMCONR		0x12	/* audio mute control */
848 #define TDA9874A_SDACOSR	0x13	/* stereo DAC output select */
849 #define TDA9874A_AOSR		0x14	/* analog output select */
850 #define TDA9874A_DAICONR	0x15	/* digital audio interface config */
851 #define TDA9874A_I2SOSR		0x16	/* I2S-bus output select */
852 #define TDA9874A_I2SOLAR	0x17	/* I2S-bus output level adj. */
853 #define TDA9874A_MDACOSR	0x18	/* mono DAC output select (tda9874a) */
854 #define TDA9874A_ESP		0xFF	/* easy standard progr. (tda9874a) */
855 
856 /* Subaddresses for TDA9874H and TDA9874A (slave tx) */
857 #define TDA9874A_DSR		0x00	/* device status */
858 #define TDA9874A_NSR		0x01	/* NICAM status */
859 #define TDA9874A_NECR		0x02	/* NICAM error count */
860 #define TDA9874A_DR1		0x03	/* add. data LSB */
861 #define TDA9874A_DR2		0x04	/* add. data MSB */
862 #define TDA9874A_LLRA		0x05	/* monitor level read-out LSB */
863 #define TDA9874A_LLRB		0x06	/* monitor level read-out MSB */
864 #define TDA9874A_SIFLR		0x07	/* SIF level */
865 #define TDA9874A_TR2		252	/* test reg. 2 */
866 #define TDA9874A_TR1		253	/* test reg. 1 */
867 #define TDA9874A_DIC		254	/* device id. code */
868 #define TDA9874A_SIC		255	/* software id. code */
869 
870 
871 static int tda9874a_mode = 1;		/* 0: A2, 1: NICAM */
872 static int tda9874a_GCONR = 0xc0;	/* default config. input pin: SIFSEL=0 */
873 static int tda9874a_NCONR = 0x01;	/* default NICAM config.: AMSEL=0,AMUTE=1 */
874 static int tda9874a_ESP = 0x07;		/* default standard: NICAM D/K */
875 static int tda9874a_dic = -1;		/* device id. code */
876 
877 /* insmod options for tda9874a */
878 static unsigned int tda9874a_SIF   = UNSET;
879 static unsigned int tda9874a_AMSEL = UNSET;
880 static unsigned int tda9874a_STD   = UNSET;
881 module_param(tda9874a_SIF, int, 0444);
882 module_param(tda9874a_AMSEL, int, 0444);
883 module_param(tda9874a_STD, int, 0444);
884 
885 /*
886  * initialization table for tda9874 decoder:
887  *  - carrier 1 freq. registers (3 bytes)
888  *  - carrier 2 freq. registers (3 bytes)
889  *  - demudulator config register
890  *  - FM de-emphasis register (slow identification mode)
891  * Note: frequency registers must be written in single i2c transfer.
892  */
893 static struct tda9874a_MODES {
894 	char *name;
895 	audiocmd cmd;
896 } tda9874a_modelist[9] = {
897   {	"A2, B/G", /* default */
898 	{ 9, { TDA9874A_C1FRA, 0x72,0x95,0x55, 0x77,0xA0,0x00, 0x00,0x00 }} },
899   {	"A2, M (Korea)",
900 	{ 9, { TDA9874A_C1FRA, 0x5D,0xC0,0x00, 0x62,0x6A,0xAA, 0x20,0x22 }} },
901   {	"A2, D/K (1)",
902 	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x82,0x60,0x00, 0x00,0x00 }} },
903   {	"A2, D/K (2)",
904 	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x8C,0x75,0x55, 0x00,0x00 }} },
905   {	"A2, D/K (3)",
906 	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x77,0xA0,0x00, 0x00,0x00 }} },
907   {	"NICAM, I",
908 	{ 9, { TDA9874A_C1FRA, 0x7D,0x00,0x00, 0x88,0x8A,0xAA, 0x08,0x33 }} },
909   {	"NICAM, B/G",
910 	{ 9, { TDA9874A_C1FRA, 0x72,0x95,0x55, 0x79,0xEA,0xAA, 0x08,0x33 }} },
911   {	"NICAM, D/K",
912 	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x79,0xEA,0xAA, 0x08,0x33 }} },
913   {	"NICAM, L",
914 	{ 9, { TDA9874A_C1FRA, 0x87,0x6A,0xAA, 0x79,0xEA,0xAA, 0x09,0x33 }} }
915 };
916 
tda9874a_setup(struct CHIPSTATE * chip)917 static int tda9874a_setup(struct CHIPSTATE *chip)
918 {
919 	struct v4l2_subdev *sd = &chip->sd;
920 
921 	chip_write(chip, TDA9874A_AGCGR, 0x00); /* 0 dB */
922 	chip_write(chip, TDA9874A_GCONR, tda9874a_GCONR);
923 	chip_write(chip, TDA9874A_MSR, (tda9874a_mode) ? 0x03:0x02);
924 	if(tda9874a_dic == 0x11) {
925 		chip_write(chip, TDA9874A_FMMR, 0x80);
926 	} else { /* dic == 0x07 */
927 		chip_cmd(chip,"tda9874_modelist",&tda9874a_modelist[tda9874a_STD].cmd);
928 		chip_write(chip, TDA9874A_FMMR, 0x00);
929 	}
930 	chip_write(chip, TDA9874A_C1OLAR, 0x00); /* 0 dB */
931 	chip_write(chip, TDA9874A_C2OLAR, 0x00); /* 0 dB */
932 	chip_write(chip, TDA9874A_NCONR, tda9874a_NCONR);
933 	chip_write(chip, TDA9874A_NOLAR, 0x00); /* 0 dB */
934 	/* Note: If signal quality is poor you may want to change NICAM */
935 	/* error limit registers (NLELR and NUELR) to some greater values. */
936 	/* Then the sound would remain stereo, but won't be so clear. */
937 	chip_write(chip, TDA9874A_NLELR, 0x14); /* default */
938 	chip_write(chip, TDA9874A_NUELR, 0x50); /* default */
939 
940 	if(tda9874a_dic == 0x11) {
941 		chip_write(chip, TDA9874A_AMCONR, 0xf9);
942 		chip_write(chip, TDA9874A_SDACOSR, (tda9874a_mode) ? 0x81:0x80);
943 		chip_write(chip, TDA9874A_AOSR, 0x80);
944 		chip_write(chip, TDA9874A_MDACOSR, (tda9874a_mode) ? 0x82:0x80);
945 		chip_write(chip, TDA9874A_ESP, tda9874a_ESP);
946 	} else { /* dic == 0x07 */
947 		chip_write(chip, TDA9874A_AMCONR, 0xfb);
948 		chip_write(chip, TDA9874A_SDACOSR, (tda9874a_mode) ? 0x81:0x80);
949 		chip_write(chip, TDA9874A_AOSR, 0x00); /* or 0x10 */
950 	}
951 	v4l2_dbg(1, debug, sd, "tda9874a_setup(): %s [0x%02X].\n",
952 		tda9874a_modelist[tda9874a_STD].name,tda9874a_STD);
953 	return 1;
954 }
955 
tda9874a_getrxsubchans(struct CHIPSTATE * chip)956 static int tda9874a_getrxsubchans(struct CHIPSTATE *chip)
957 {
958 	struct v4l2_subdev *sd = &chip->sd;
959 	int dsr,nsr,mode;
960 	int necr; /* just for debugging */
961 
962 	mode = V4L2_TUNER_SUB_MONO;
963 
964 	dsr = chip_read2(chip, TDA9874A_DSR);
965 	if (dsr < 0)
966 		return mode;
967 	nsr = chip_read2(chip, TDA9874A_NSR);
968 	if (nsr < 0)
969 		return mode;
970 	necr = chip_read2(chip, TDA9874A_NECR);
971 	if (necr < 0)
972 		return mode;
973 
974 	/* need to store dsr/nsr somewhere */
975 	chip->shadow.bytes[MAXREGS-2] = dsr;
976 	chip->shadow.bytes[MAXREGS-1] = nsr;
977 
978 	if(tda9874a_mode) {
979 		/* Note: DSR.RSSF and DSR.AMSTAT bits are also checked.
980 		 * If NICAM auto-muting is enabled, DSR.AMSTAT=1 indicates
981 		 * that sound has (temporarily) switched from NICAM to
982 		 * mono FM (or AM) on 1st sound carrier due to high NICAM bit
983 		 * error count. So in fact there is no stereo in this case :-(
984 		 * But changing the mode to V4L2_TUNER_MODE_MONO would switch
985 		 * external 4052 multiplexer in audio_hook().
986 		 */
987 		if(nsr & 0x02) /* NSR.S/MB=1 */
988 			mode = V4L2_TUNER_SUB_STEREO;
989 		if(nsr & 0x01) /* NSR.D/SB=1 */
990 			mode |= V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
991 	} else {
992 		if(dsr & 0x02) /* DSR.IDSTE=1 */
993 			mode = V4L2_TUNER_SUB_STEREO;
994 		if(dsr & 0x04) /* DSR.IDDUA=1 */
995 			mode |= V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
996 	}
997 
998 	v4l2_dbg(1, debug, sd,
999 		 "tda9874a_getrxsubchans(): DSR=0x%X, NSR=0x%X, NECR=0x%X, return: %d.\n",
1000 		 dsr, nsr, necr, mode);
1001 	return mode;
1002 }
1003 
tda9874a_setaudmode(struct CHIPSTATE * chip,int mode)1004 static void tda9874a_setaudmode(struct CHIPSTATE *chip, int mode)
1005 {
1006 	struct v4l2_subdev *sd = &chip->sd;
1007 
1008 	/* Disable/enable NICAM auto-muting (based on DSR.RSSF status bit). */
1009 	/* If auto-muting is disabled, we can hear a signal of degrading quality. */
1010 	if (tda9874a_mode) {
1011 		if(chip->shadow.bytes[MAXREGS-2] & 0x20) /* DSR.RSSF=1 */
1012 			tda9874a_NCONR &= 0xfe; /* enable */
1013 		else
1014 			tda9874a_NCONR |= 0x01; /* disable */
1015 		chip_write(chip, TDA9874A_NCONR, tda9874a_NCONR);
1016 	}
1017 
1018 	/* Note: TDA9874A supports automatic FM dematrixing (FMMR register)
1019 	 * and has auto-select function for audio output (AOSR register).
1020 	 * Old TDA9874H doesn't support these features.
1021 	 * TDA9874A also has additional mono output pin (OUTM), which
1022 	 * on same (all?) tv-cards is not used, anyway (as well as MONOIN).
1023 	 */
1024 	if(tda9874a_dic == 0x11) {
1025 		int aosr = 0x80;
1026 		int mdacosr = (tda9874a_mode) ? 0x82:0x80;
1027 
1028 		switch(mode) {
1029 		case V4L2_TUNER_MODE_MONO:
1030 		case V4L2_TUNER_MODE_STEREO:
1031 			break;
1032 		case V4L2_TUNER_MODE_LANG1:
1033 			aosr = 0x80; /* auto-select, dual A/A */
1034 			mdacosr = (tda9874a_mode) ? 0x82:0x80;
1035 			break;
1036 		case V4L2_TUNER_MODE_LANG2:
1037 			aosr = 0xa0; /* auto-select, dual B/B */
1038 			mdacosr = (tda9874a_mode) ? 0x83:0x81;
1039 			break;
1040 		case V4L2_TUNER_MODE_LANG1_LANG2:
1041 			aosr = 0x00; /* always route L to L and R to R */
1042 			mdacosr = (tda9874a_mode) ? 0x82:0x80;
1043 			break;
1044 		default:
1045 			return;
1046 		}
1047 		chip_write(chip, TDA9874A_AOSR, aosr);
1048 		chip_write(chip, TDA9874A_MDACOSR, mdacosr);
1049 
1050 		v4l2_dbg(1, debug, sd,
1051 			"tda9874a_setaudmode(): req. mode %d; AOSR=0x%X, MDACOSR=0x%X.\n",
1052 			mode, aosr, mdacosr);
1053 
1054 	} else { /* dic == 0x07 */
1055 		int fmmr,aosr;
1056 
1057 		switch(mode) {
1058 		case V4L2_TUNER_MODE_MONO:
1059 			fmmr = 0x00; /* mono */
1060 			aosr = 0x10; /* A/A */
1061 			break;
1062 		case V4L2_TUNER_MODE_STEREO:
1063 			if(tda9874a_mode) {
1064 				fmmr = 0x00;
1065 				aosr = 0x00; /* handled by NICAM auto-mute */
1066 			} else {
1067 				fmmr = (tda9874a_ESP == 1) ? 0x05 : 0x04; /* stereo */
1068 				aosr = 0x00;
1069 			}
1070 			break;
1071 		case V4L2_TUNER_MODE_LANG1:
1072 			fmmr = 0x02; /* dual */
1073 			aosr = 0x10; /* dual A/A */
1074 			break;
1075 		case V4L2_TUNER_MODE_LANG2:
1076 			fmmr = 0x02; /* dual */
1077 			aosr = 0x20; /* dual B/B */
1078 			break;
1079 		case V4L2_TUNER_MODE_LANG1_LANG2:
1080 			fmmr = 0x02; /* dual */
1081 			aosr = 0x00; /* dual A/B */
1082 			break;
1083 		default:
1084 			return;
1085 		}
1086 		chip_write(chip, TDA9874A_FMMR, fmmr);
1087 		chip_write(chip, TDA9874A_AOSR, aosr);
1088 
1089 		v4l2_dbg(1, debug, sd,
1090 			"tda9874a_setaudmode(): req. mode %d; FMMR=0x%X, AOSR=0x%X.\n",
1091 			mode, fmmr, aosr);
1092 	}
1093 }
1094 
tda9874a_checkit(struct CHIPSTATE * chip)1095 static int tda9874a_checkit(struct CHIPSTATE *chip)
1096 {
1097 	struct v4l2_subdev *sd = &chip->sd;
1098 	int dic,sic;	/* device id. and software id. codes */
1099 
1100 	dic = chip_read2(chip, TDA9874A_DIC);
1101 	if (dic < 0)
1102 		return 0;
1103 	sic = chip_read2(chip, TDA9874A_SIC);
1104 	if (sic < 0)
1105 		return 0;
1106 
1107 	v4l2_dbg(1, debug, sd, "tda9874a_checkit(): DIC=0x%X, SIC=0x%X.\n", dic, sic);
1108 
1109 	if((dic == 0x11)||(dic == 0x07)) {
1110 		v4l2_info(sd, "found tda9874%s.\n", (dic == 0x11) ? "a" : "h");
1111 		tda9874a_dic = dic;	/* remember device id. */
1112 		return 1;
1113 	}
1114 	return 0;	/* not found */
1115 }
1116 
tda9874a_initialize(struct CHIPSTATE * chip)1117 static int tda9874a_initialize(struct CHIPSTATE *chip)
1118 {
1119 	if (tda9874a_SIF > 2)
1120 		tda9874a_SIF = 1;
1121 	if (tda9874a_STD >= ARRAY_SIZE(tda9874a_modelist))
1122 		tda9874a_STD = 0;
1123 	if(tda9874a_AMSEL > 1)
1124 		tda9874a_AMSEL = 0;
1125 
1126 	if(tda9874a_SIF == 1)
1127 		tda9874a_GCONR = 0xc0;	/* sound IF input 1 */
1128 	else
1129 		tda9874a_GCONR = 0xc1;	/* sound IF input 2 */
1130 
1131 	tda9874a_ESP = tda9874a_STD;
1132 	tda9874a_mode = (tda9874a_STD < 5) ? 0 : 1;
1133 
1134 	if(tda9874a_AMSEL == 0)
1135 		tda9874a_NCONR = 0x01; /* auto-mute: analog mono input */
1136 	else
1137 		tda9874a_NCONR = 0x05; /* auto-mute: 1st carrier FM or AM */
1138 
1139 	tda9874a_setup(chip);
1140 	return 0;
1141 }
1142 
1143 /* ---------------------------------------------------------------------- */
1144 /* audio chip description - defines+functions for tda9875                 */
1145 /* The TDA9875 is made by Philips Semiconductor
1146  * http://www.semiconductors.philips.com
1147  * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator
1148  *
1149  */
1150 
1151 /* subaddresses for TDA9875 */
1152 #define TDA9875_MUT         0x12  /*General mute  (value --> 0b11001100*/
1153 #define TDA9875_CFG         0x01  /* Config register (value --> 0b00000000 */
1154 #define TDA9875_DACOS       0x13  /*DAC i/o select (ADC) 0b0000100*/
1155 #define TDA9875_LOSR        0x16  /*Line output select regirter 0b0100 0001*/
1156 
1157 #define TDA9875_CH1V        0x0c  /*Channel 1 volume (mute)*/
1158 #define TDA9875_CH2V        0x0d  /*Channel 2 volume (mute)*/
1159 #define TDA9875_SC1         0x14  /*SCART 1 in (mono)*/
1160 #define TDA9875_SC2         0x15  /*SCART 2 in (mono)*/
1161 
1162 #define TDA9875_ADCIS       0x17  /*ADC input select (mono) 0b0110 000*/
1163 #define TDA9875_AER         0x19  /*Audio effect (AVL+Pseudo) 0b0000 0110*/
1164 #define TDA9875_MCS         0x18  /*Main channel select (DAC) 0b0000100*/
1165 #define TDA9875_MVL         0x1a  /* Main volume gauche */
1166 #define TDA9875_MVR         0x1b  /* Main volume droite */
1167 #define TDA9875_MBA         0x1d  /* Main Basse */
1168 #define TDA9875_MTR         0x1e  /* Main treble */
1169 #define TDA9875_ACS         0x1f  /* Auxiliary channel select (FM) 0b0000000*/
1170 #define TDA9875_AVL         0x20  /* Auxiliary volume gauche */
1171 #define TDA9875_AVR         0x21  /* Auxiliary volume droite */
1172 #define TDA9875_ABA         0x22  /* Auxiliary Basse */
1173 #define TDA9875_ATR         0x23  /* Auxiliary treble */
1174 
1175 #define TDA9875_MSR         0x02  /* Monitor select register */
1176 #define TDA9875_C1MSB       0x03  /* Carrier 1 (FM) frequency register MSB */
1177 #define TDA9875_C1MIB       0x04  /* Carrier 1 (FM) frequency register (16-8]b */
1178 #define TDA9875_C1LSB       0x05  /* Carrier 1 (FM) frequency register LSB */
1179 #define TDA9875_C2MSB       0x06  /* Carrier 2 (nicam) frequency register MSB */
1180 #define TDA9875_C2MIB       0x07  /* Carrier 2 (nicam) frequency register (16-8]b */
1181 #define TDA9875_C2LSB       0x08  /* Carrier 2 (nicam) frequency register LSB */
1182 #define TDA9875_DCR         0x09  /* Demodulateur configuration regirter*/
1183 #define TDA9875_DEEM        0x0a  /* FM de-emphasis regirter*/
1184 #define TDA9875_FMAT        0x0b  /* FM Matrix regirter*/
1185 
1186 /* values */
1187 #define TDA9875_MUTE_ON	    0xff /* general mute */
1188 #define TDA9875_MUTE_OFF    0xcc /* general no mute */
1189 
tda9875_initialize(struct CHIPSTATE * chip)1190 static int tda9875_initialize(struct CHIPSTATE *chip)
1191 {
1192 	chip_write(chip, TDA9875_CFG, 0xd0); /*reg de config 0 (reset)*/
1193 	chip_write(chip, TDA9875_MSR, 0x03);    /* Monitor 0b00000XXX*/
1194 	chip_write(chip, TDA9875_C1MSB, 0x00);  /*Car1(FM) MSB XMHz*/
1195 	chip_write(chip, TDA9875_C1MIB, 0x00);  /*Car1(FM) MIB XMHz*/
1196 	chip_write(chip, TDA9875_C1LSB, 0x00);  /*Car1(FM) LSB XMHz*/
1197 	chip_write(chip, TDA9875_C2MSB, 0x00);  /*Car2(NICAM) MSB XMHz*/
1198 	chip_write(chip, TDA9875_C2MIB, 0x00);  /*Car2(NICAM) MIB XMHz*/
1199 	chip_write(chip, TDA9875_C2LSB, 0x00);  /*Car2(NICAM) LSB XMHz*/
1200 	chip_write(chip, TDA9875_DCR, 0x00);    /*Demod config 0x00*/
1201 	chip_write(chip, TDA9875_DEEM, 0x44);   /*DE-Emph 0b0100 0100*/
1202 	chip_write(chip, TDA9875_FMAT, 0x00);   /*FM Matrix reg 0x00*/
1203 	chip_write(chip, TDA9875_SC1, 0x00);    /* SCART 1 (SC1)*/
1204 	chip_write(chip, TDA9875_SC2, 0x01);    /* SCART 2 (sc2)*/
1205 
1206 	chip_write(chip, TDA9875_CH1V, 0x10);  /* Channel volume 1 mute*/
1207 	chip_write(chip, TDA9875_CH2V, 0x10);  /* Channel volume 2 mute */
1208 	chip_write(chip, TDA9875_DACOS, 0x02); /* sig DAC i/o(in:nicam)*/
1209 	chip_write(chip, TDA9875_ADCIS, 0x6f); /* sig ADC input(in:mono)*/
1210 	chip_write(chip, TDA9875_LOSR, 0x00);  /* line out (in:mono)*/
1211 	chip_write(chip, TDA9875_AER, 0x00);   /*06 Effect (AVL+PSEUDO) */
1212 	chip_write(chip, TDA9875_MCS, 0x44);   /* Main ch select (DAC) */
1213 	chip_write(chip, TDA9875_MVL, 0x03);   /* Vol Main left 10dB */
1214 	chip_write(chip, TDA9875_MVR, 0x03);   /* Vol Main right 10dB*/
1215 	chip_write(chip, TDA9875_MBA, 0x00);   /* Main Bass Main 0dB*/
1216 	chip_write(chip, TDA9875_MTR, 0x00);   /* Main Treble Main 0dB*/
1217 	chip_write(chip, TDA9875_ACS, 0x44);   /* Aux chan select (dac)*/
1218 	chip_write(chip, TDA9875_AVL, 0x00);   /* Vol Aux left 0dB*/
1219 	chip_write(chip, TDA9875_AVR, 0x00);   /* Vol Aux right 0dB*/
1220 	chip_write(chip, TDA9875_ABA, 0x00);   /* Aux Bass Main 0dB*/
1221 	chip_write(chip, TDA9875_ATR, 0x00);   /* Aux Aigus Main 0dB*/
1222 
1223 	chip_write(chip, TDA9875_MUT, 0xcc);   /* General mute  */
1224 	return 0;
1225 }
1226 
tda9875_volume(int val)1227 static int tda9875_volume(int val) { return (unsigned char)(val / 602 - 84); }
tda9875_bass(int val)1228 static int tda9875_bass(int val) { return (unsigned char)(max(-12, val / 2115 - 15)); }
tda9875_treble(int val)1229 static int tda9875_treble(int val) { return (unsigned char)(val / 2622 - 12); }
1230 
1231 /* ----------------------------------------------------------------------- */
1232 
1233 
1234 /* *********************** *
1235  * i2c interface functions *
1236  * *********************** */
1237 
tda9875_checkit(struct CHIPSTATE * chip)1238 static int tda9875_checkit(struct CHIPSTATE *chip)
1239 {
1240 	struct v4l2_subdev *sd = &chip->sd;
1241 	int dic, rev;
1242 
1243 	dic = chip_read2(chip, 254);
1244 	if (dic < 0)
1245 		return 0;
1246 	rev = chip_read2(chip, 255);
1247 	if (rev < 0)
1248 		return 0;
1249 
1250 	if (dic == 0 || dic == 2) { /* tda9875 and tda9875A */
1251 		v4l2_info(sd, "found tda9875%s rev. %d.\n",
1252 			dic == 0 ? "" : "A", rev);
1253 		return 1;
1254 	}
1255 	return 0;
1256 }
1257 
1258 /* ---------------------------------------------------------------------- */
1259 /* audio chip descriptions - defines+functions for tea6420                */
1260 
1261 #define TEA6300_VL         0x00  /* volume left */
1262 #define TEA6300_VR         0x01  /* volume right */
1263 #define TEA6300_BA         0x02  /* bass */
1264 #define TEA6300_TR         0x03  /* treble */
1265 #define TEA6300_FA         0x04  /* fader control */
1266 #define TEA6300_S          0x05  /* switch register */
1267 				 /* values for those registers: */
1268 #define TEA6300_S_SA       0x01  /* stereo A input */
1269 #define TEA6300_S_SB       0x02  /* stereo B */
1270 #define TEA6300_S_SC       0x04  /* stereo C */
1271 #define TEA6300_S_GMU      0x80  /* general mute */
1272 
1273 #define TEA6320_V          0x00  /* volume (0-5)/loudness off (6)/zero crossing mute(7) */
1274 #define TEA6320_FFR        0x01  /* fader front right (0-5) */
1275 #define TEA6320_FFL        0x02  /* fader front left (0-5) */
1276 #define TEA6320_FRR        0x03  /* fader rear right (0-5) */
1277 #define TEA6320_FRL        0x04  /* fader rear left (0-5) */
1278 #define TEA6320_BA         0x05  /* bass (0-4) */
1279 #define TEA6320_TR         0x06  /* treble (0-4) */
1280 #define TEA6320_S          0x07  /* switch register */
1281 				 /* values for those registers: */
1282 #define TEA6320_S_SA       0x07  /* stereo A input */
1283 #define TEA6320_S_SB       0x06  /* stereo B */
1284 #define TEA6320_S_SC       0x05  /* stereo C */
1285 #define TEA6320_S_SD       0x04  /* stereo D */
1286 #define TEA6320_S_GMU      0x80  /* general mute */
1287 
1288 #define TEA6420_S_SA       0x00  /* stereo A input */
1289 #define TEA6420_S_SB       0x01  /* stereo B */
1290 #define TEA6420_S_SC       0x02  /* stereo C */
1291 #define TEA6420_S_SD       0x03  /* stereo D */
1292 #define TEA6420_S_SE       0x04  /* stereo E */
1293 #define TEA6420_S_GMU      0x05  /* general mute */
1294 
tea6300_shift10(int val)1295 static int tea6300_shift10(int val) { return val >> 10; }
tea6300_shift12(int val)1296 static int tea6300_shift12(int val) { return val >> 12; }
1297 
1298 /* Assumes 16bit input (values 0x3f to 0x0c are unique, values less than */
1299 /* 0x0c mirror those immediately higher) */
tea6320_volume(int val)1300 static int tea6320_volume(int val) { return (val / (65535/(63-12)) + 12) & 0x3f; }
tea6320_shift11(int val)1301 static int tea6320_shift11(int val) { return val >> 11; }
tea6320_initialize(struct CHIPSTATE * chip)1302 static int tea6320_initialize(struct CHIPSTATE * chip)
1303 {
1304 	chip_write(chip, TEA6320_FFR, 0x3f);
1305 	chip_write(chip, TEA6320_FFL, 0x3f);
1306 	chip_write(chip, TEA6320_FRR, 0x3f);
1307 	chip_write(chip, TEA6320_FRL, 0x3f);
1308 
1309 	return 0;
1310 }
1311 
1312 
1313 /* ---------------------------------------------------------------------- */
1314 /* audio chip descriptions - defines+functions for tda8425                */
1315 
1316 #define TDA8425_VL         0x00  /* volume left */
1317 #define TDA8425_VR         0x01  /* volume right */
1318 #define TDA8425_BA         0x02  /* bass */
1319 #define TDA8425_TR         0x03  /* treble */
1320 #define TDA8425_S1         0x08  /* switch functions */
1321 				 /* values for those registers: */
1322 #define TDA8425_S1_OFF     0xEE  /* audio off (mute on) */
1323 #define TDA8425_S1_CH1     0xCE  /* audio channel 1 (mute off) - "linear stereo" mode */
1324 #define TDA8425_S1_CH2     0xCF  /* audio channel 2 (mute off) - "linear stereo" mode */
1325 #define TDA8425_S1_MU      0x20  /* mute bit */
1326 #define TDA8425_S1_STEREO  0x18  /* stereo bits */
1327 #define TDA8425_S1_STEREO_SPATIAL 0x18 /* spatial stereo */
1328 #define TDA8425_S1_STEREO_LINEAR  0x08 /* linear stereo */
1329 #define TDA8425_S1_STEREO_PSEUDO  0x10 /* pseudo stereo */
1330 #define TDA8425_S1_STEREO_MONO    0x00 /* forced mono */
1331 #define TDA8425_S1_ML      0x06        /* language selector */
1332 #define TDA8425_S1_ML_SOUND_A 0x02     /* sound a */
1333 #define TDA8425_S1_ML_SOUND_B 0x04     /* sound b */
1334 #define TDA8425_S1_ML_STEREO  0x06     /* stereo */
1335 #define TDA8425_S1_IS      0x01        /* channel selector */
1336 
1337 
tda8425_shift10(int val)1338 static int tda8425_shift10(int val) { return (val >> 10) | 0xc0; }
tda8425_shift12(int val)1339 static int tda8425_shift12(int val) { return (val >> 12) | 0xf0; }
1340 
tda8425_setaudmode(struct CHIPSTATE * chip,int mode)1341 static void tda8425_setaudmode(struct CHIPSTATE *chip, int mode)
1342 {
1343 	int s1 = chip->shadow.bytes[TDA8425_S1+1] & 0xe1;
1344 
1345 	switch (mode) {
1346 	case V4L2_TUNER_MODE_LANG1:
1347 		s1 |= TDA8425_S1_ML_SOUND_A;
1348 		s1 |= TDA8425_S1_STEREO_PSEUDO;
1349 		break;
1350 	case V4L2_TUNER_MODE_LANG2:
1351 		s1 |= TDA8425_S1_ML_SOUND_B;
1352 		s1 |= TDA8425_S1_STEREO_PSEUDO;
1353 		break;
1354 	case V4L2_TUNER_MODE_LANG1_LANG2:
1355 		s1 |= TDA8425_S1_ML_STEREO;
1356 		s1 |= TDA8425_S1_STEREO_LINEAR;
1357 		break;
1358 	case V4L2_TUNER_MODE_MONO:
1359 		s1 |= TDA8425_S1_ML_STEREO;
1360 		s1 |= TDA8425_S1_STEREO_MONO;
1361 		break;
1362 	case V4L2_TUNER_MODE_STEREO:
1363 		s1 |= TDA8425_S1_ML_STEREO;
1364 		s1 |= TDA8425_S1_STEREO_SPATIAL;
1365 		break;
1366 	default:
1367 		return;
1368 	}
1369 	chip_write(chip,TDA8425_S1,s1);
1370 }
1371 
1372 
1373 /* ---------------------------------------------------------------------- */
1374 /* audio chip descriptions - defines+functions for pic16c54 (PV951)       */
1375 
1376 /* the registers of 16C54, I2C sub address. */
1377 #define PIC16C54_REG_KEY_CODE     0x01	       /* Not use. */
1378 #define PIC16C54_REG_MISC         0x02
1379 
1380 /* bit definition of the RESET register, I2C data. */
1381 #define PIC16C54_MISC_RESET_REMOTE_CTL 0x01 /* bit 0, Reset to receive the key */
1382 					    /*        code of remote controller */
1383 #define PIC16C54_MISC_MTS_MAIN         0x02 /* bit 1 */
1384 #define PIC16C54_MISC_MTS_SAP          0x04 /* bit 2 */
1385 #define PIC16C54_MISC_MTS_BOTH         0x08 /* bit 3 */
1386 #define PIC16C54_MISC_SND_MUTE         0x10 /* bit 4, Mute Audio(Line-in and Tuner) */
1387 #define PIC16C54_MISC_SND_NOTMUTE      0x20 /* bit 5 */
1388 #define PIC16C54_MISC_SWITCH_TUNER     0x40 /* bit 6	, Switch to Line-in */
1389 #define PIC16C54_MISC_SWITCH_LINE      0x80 /* bit 7	, Switch to Tuner */
1390 
1391 /* ---------------------------------------------------------------------- */
1392 /* audio chip descriptions - defines+functions for TA8874Z                */
1393 
1394 /* write 1st byte */
1395 #define TA8874Z_LED_STE	0x80
1396 #define TA8874Z_LED_BIL	0x40
1397 #define TA8874Z_LED_EXT	0x20
1398 #define TA8874Z_MONO_SET	0x10
1399 #define TA8874Z_MUTE	0x08
1400 #define TA8874Z_F_MONO	0x04
1401 #define TA8874Z_MODE_SUB	0x02
1402 #define TA8874Z_MODE_MAIN	0x01
1403 
1404 /* write 2nd byte */
1405 /*#define TA8874Z_TI	0x80  */ /* test mode */
1406 #define TA8874Z_SEPARATION	0x3f
1407 #define TA8874Z_SEPARATION_DEFAULT	0x10
1408 
1409 /* read */
1410 #define TA8874Z_B1	0x80
1411 #define TA8874Z_B0	0x40
1412 #define TA8874Z_CHAG_FLAG	0x20
1413 
1414 /*
1415  *        B1 B0
1416  * mono    L  H
1417  * stereo  L  L
1418  * BIL     H  L
1419  */
ta8874z_getrxsubchans(struct CHIPSTATE * chip)1420 static int ta8874z_getrxsubchans(struct CHIPSTATE *chip)
1421 {
1422 	int val, mode;
1423 
1424 	mode = V4L2_TUNER_SUB_MONO;
1425 
1426 	val = chip_read(chip);
1427 	if (val < 0)
1428 		return mode;
1429 
1430 	if (val & TA8874Z_B1){
1431 		mode |= V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
1432 	}else if (!(val & TA8874Z_B0)){
1433 		mode = V4L2_TUNER_SUB_STEREO;
1434 	}
1435 	/* v4l2_dbg(1, debug, &chip->sd,
1436 		 "ta8874z_getrxsubchans(): raw chip read: 0x%02x, return: 0x%02x\n",
1437 		 val, mode); */
1438 	return mode;
1439 }
1440 
1441 static audiocmd ta8874z_stereo = { 2, {0, TA8874Z_SEPARATION_DEFAULT}};
1442 static audiocmd ta8874z_mono = {2, { TA8874Z_MONO_SET, TA8874Z_SEPARATION_DEFAULT}};
1443 static audiocmd ta8874z_main = {2, { 0, TA8874Z_SEPARATION_DEFAULT}};
1444 static audiocmd ta8874z_sub = {2, { TA8874Z_MODE_SUB, TA8874Z_SEPARATION_DEFAULT}};
1445 static audiocmd ta8874z_both = {2, { TA8874Z_MODE_MAIN | TA8874Z_MODE_SUB, TA8874Z_SEPARATION_DEFAULT}};
1446 
ta8874z_setaudmode(struct CHIPSTATE * chip,int mode)1447 static void ta8874z_setaudmode(struct CHIPSTATE *chip, int mode)
1448 {
1449 	struct v4l2_subdev *sd = &chip->sd;
1450 	int update = 1;
1451 	audiocmd *t = NULL;
1452 
1453 	v4l2_dbg(1, debug, sd, "ta8874z_setaudmode(): mode: 0x%02x\n", mode);
1454 
1455 	switch(mode){
1456 	case V4L2_TUNER_MODE_MONO:
1457 		t = &ta8874z_mono;
1458 		break;
1459 	case V4L2_TUNER_MODE_STEREO:
1460 		t = &ta8874z_stereo;
1461 		break;
1462 	case V4L2_TUNER_MODE_LANG1:
1463 		t = &ta8874z_main;
1464 		break;
1465 	case V4L2_TUNER_MODE_LANG2:
1466 		t = &ta8874z_sub;
1467 		break;
1468 	case V4L2_TUNER_MODE_LANG1_LANG2:
1469 		t = &ta8874z_both;
1470 		break;
1471 	default:
1472 		update = 0;
1473 	}
1474 
1475 	if(update)
1476 		chip_cmd(chip, "TA8874Z", t);
1477 }
1478 
ta8874z_checkit(struct CHIPSTATE * chip)1479 static int ta8874z_checkit(struct CHIPSTATE *chip)
1480 {
1481 	int rc;
1482 
1483 	rc = chip_read(chip);
1484 	if (rc < 0)
1485 		return rc;
1486 
1487 	return ((rc & 0x1f) == 0x1f) ? 1 : 0;
1488 }
1489 
1490 /* ---------------------------------------------------------------------- */
1491 /* audio chip descriptions - struct CHIPDESC                              */
1492 
1493 /* insmod options to enable/disable individual audio chips */
1494 static int tda8425  = 1;
1495 static int tda9840  = 1;
1496 static int tda9850  = 1;
1497 static int tda9855  = 1;
1498 static int tda9873  = 1;
1499 static int tda9874a = 1;
1500 static int tda9875  = 1;
1501 static int tea6300;	/* default 0 - address clash with msp34xx */
1502 static int tea6320;	/* default 0 - address clash with msp34xx */
1503 static int tea6420  = 1;
1504 static int pic16c54 = 1;
1505 static int ta8874z;	/* default 0 - address clash with tda9840 */
1506 
1507 module_param(tda8425, int, 0444);
1508 module_param(tda9840, int, 0444);
1509 module_param(tda9850, int, 0444);
1510 module_param(tda9855, int, 0444);
1511 module_param(tda9873, int, 0444);
1512 module_param(tda9874a, int, 0444);
1513 module_param(tda9875, int, 0444);
1514 module_param(tea6300, int, 0444);
1515 module_param(tea6320, int, 0444);
1516 module_param(tea6420, int, 0444);
1517 module_param(pic16c54, int, 0444);
1518 module_param(ta8874z, int, 0444);
1519 
1520 static struct CHIPDESC chiplist[] = {
1521 	{
1522 		.name       = "tda9840",
1523 		.insmodopt  = &tda9840,
1524 		.addr_lo    = I2C_ADDR_TDA9840 >> 1,
1525 		.addr_hi    = I2C_ADDR_TDA9840 >> 1,
1526 		.registers  = 5,
1527 		.flags      = CHIP_NEED_CHECKMODE,
1528 
1529 		/* callbacks */
1530 		.checkit    = tda9840_checkit,
1531 		.getrxsubchans = tda9840_getrxsubchans,
1532 		.setaudmode = tda9840_setaudmode,
1533 
1534 		.init       = { 2, { TDA9840_TEST, TDA9840_TEST_INT1SN
1535 				/* ,TDA9840_SW, TDA9840_MONO */} }
1536 	},
1537 	{
1538 		.name       = "tda9873h",
1539 		.insmodopt  = &tda9873,
1540 		.addr_lo    = I2C_ADDR_TDA985x_L >> 1,
1541 		.addr_hi    = I2C_ADDR_TDA985x_H >> 1,
1542 		.registers  = 3,
1543 		.flags      = CHIP_HAS_INPUTSEL | CHIP_NEED_CHECKMODE,
1544 
1545 		/* callbacks */
1546 		.checkit    = tda9873_checkit,
1547 		.getrxsubchans = tda9873_getrxsubchans,
1548 		.setaudmode = tda9873_setaudmode,
1549 
1550 		.init       = { 4, { TDA9873_SW, 0xa4, 0x06, 0x03 } },
1551 		.inputreg   = TDA9873_SW,
1552 		.inputmute  = TDA9873_MUTE | TDA9873_AUTOMUTE,
1553 		.inputmap   = {0xa0, 0xa2, 0xa0, 0xa0},
1554 		.inputmask  = TDA9873_INP_MASK|TDA9873_MUTE|TDA9873_AUTOMUTE,
1555 
1556 	},
1557 	{
1558 		.name       = "tda9874h/a",
1559 		.insmodopt  = &tda9874a,
1560 		.addr_lo    = I2C_ADDR_TDA9874 >> 1,
1561 		.addr_hi    = I2C_ADDR_TDA9874 >> 1,
1562 		.flags      = CHIP_NEED_CHECKMODE,
1563 
1564 		/* callbacks */
1565 		.initialize = tda9874a_initialize,
1566 		.checkit    = tda9874a_checkit,
1567 		.getrxsubchans = tda9874a_getrxsubchans,
1568 		.setaudmode = tda9874a_setaudmode,
1569 	},
1570 	{
1571 		.name       = "tda9875",
1572 		.insmodopt  = &tda9875,
1573 		.addr_lo    = I2C_ADDR_TDA9875 >> 1,
1574 		.addr_hi    = I2C_ADDR_TDA9875 >> 1,
1575 		.flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE,
1576 
1577 		/* callbacks */
1578 		.initialize = tda9875_initialize,
1579 		.checkit    = tda9875_checkit,
1580 		.volfunc    = tda9875_volume,
1581 		.bassfunc   = tda9875_bass,
1582 		.treblefunc = tda9875_treble,
1583 		.leftreg    = TDA9875_MVL,
1584 		.rightreg   = TDA9875_MVR,
1585 		.bassreg    = TDA9875_MBA,
1586 		.treblereg  = TDA9875_MTR,
1587 		.volinit    = 58880,
1588 	},
1589 	{
1590 		.name       = "tda9850",
1591 		.insmodopt  = &tda9850,
1592 		.addr_lo    = I2C_ADDR_TDA985x_L >> 1,
1593 		.addr_hi    = I2C_ADDR_TDA985x_H >> 1,
1594 		.registers  = 11,
1595 
1596 		.getrxsubchans = tda985x_getrxsubchans,
1597 		.setaudmode = tda985x_setaudmode,
1598 
1599 		.init       = { 8, { TDA9850_C4, 0x08, 0x08, TDA985x_STEREO, 0x07, 0x10, 0x10, 0x03 } }
1600 	},
1601 	{
1602 		.name       = "tda9855",
1603 		.insmodopt  = &tda9855,
1604 		.addr_lo    = I2C_ADDR_TDA985x_L >> 1,
1605 		.addr_hi    = I2C_ADDR_TDA985x_H >> 1,
1606 		.registers  = 11,
1607 		.flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE,
1608 
1609 		.leftreg    = TDA9855_VL,
1610 		.rightreg   = TDA9855_VR,
1611 		.bassreg    = TDA9855_BA,
1612 		.treblereg  = TDA9855_TR,
1613 
1614 		/* callbacks */
1615 		.volfunc    = tda9855_volume,
1616 		.bassfunc   = tda9855_bass,
1617 		.treblefunc = tda9855_treble,
1618 		.getrxsubchans = tda985x_getrxsubchans,
1619 		.setaudmode = tda985x_setaudmode,
1620 
1621 		.init       = { 12, { 0, 0x6f, 0x6f, 0x0e, 0x07<<1, 0x8<<2,
1622 				    TDA9855_MUTE | TDA9855_AVL | TDA9855_LOUD | TDA9855_INT,
1623 				    TDA985x_STEREO | TDA9855_LINEAR | TDA9855_TZCM | TDA9855_VZCM,
1624 				    0x07, 0x10, 0x10, 0x03 }}
1625 	},
1626 	{
1627 		.name       = "tea6300",
1628 		.insmodopt  = &tea6300,
1629 		.addr_lo    = I2C_ADDR_TEA6300 >> 1,
1630 		.addr_hi    = I2C_ADDR_TEA6300 >> 1,
1631 		.registers  = 6,
1632 		.flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE | CHIP_HAS_INPUTSEL,
1633 
1634 		.leftreg    = TEA6300_VR,
1635 		.rightreg   = TEA6300_VL,
1636 		.bassreg    = TEA6300_BA,
1637 		.treblereg  = TEA6300_TR,
1638 
1639 		/* callbacks */
1640 		.volfunc    = tea6300_shift10,
1641 		.bassfunc   = tea6300_shift12,
1642 		.treblefunc = tea6300_shift12,
1643 
1644 		.inputreg   = TEA6300_S,
1645 		.inputmap   = { TEA6300_S_SA, TEA6300_S_SB, TEA6300_S_SC },
1646 		.inputmute  = TEA6300_S_GMU,
1647 	},
1648 	{
1649 		.name       = "tea6320",
1650 		.insmodopt  = &tea6320,
1651 		.addr_lo    = I2C_ADDR_TEA6300 >> 1,
1652 		.addr_hi    = I2C_ADDR_TEA6300 >> 1,
1653 		.registers  = 8,
1654 		.flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE | CHIP_HAS_INPUTSEL,
1655 
1656 		.leftreg    = TEA6320_V,
1657 		.rightreg   = TEA6320_V,
1658 		.bassreg    = TEA6320_BA,
1659 		.treblereg  = TEA6320_TR,
1660 
1661 		/* callbacks */
1662 		.initialize = tea6320_initialize,
1663 		.volfunc    = tea6320_volume,
1664 		.bassfunc   = tea6320_shift11,
1665 		.treblefunc = tea6320_shift11,
1666 
1667 		.inputreg   = TEA6320_S,
1668 		.inputmap   = { TEA6320_S_SA, TEA6420_S_SB, TEA6300_S_SC, TEA6320_S_SD },
1669 		.inputmute  = TEA6300_S_GMU,
1670 	},
1671 	{
1672 		.name       = "tea6420",
1673 		.insmodopt  = &tea6420,
1674 		.addr_lo    = I2C_ADDR_TEA6420 >> 1,
1675 		.addr_hi    = I2C_ADDR_TEA6420 >> 1,
1676 		.registers  = 1,
1677 		.flags      = CHIP_HAS_INPUTSEL,
1678 
1679 		.inputreg   = -1,
1680 		.inputmap   = { TEA6420_S_SA, TEA6420_S_SB, TEA6420_S_SC },
1681 		.inputmute  = TEA6420_S_GMU,
1682 		.inputmask  = 0x07,
1683 	},
1684 	{
1685 		.name       = "tda8425",
1686 		.insmodopt  = &tda8425,
1687 		.addr_lo    = I2C_ADDR_TDA8425 >> 1,
1688 		.addr_hi    = I2C_ADDR_TDA8425 >> 1,
1689 		.registers  = 9,
1690 		.flags      = CHIP_HAS_VOLUME | CHIP_HAS_BASSTREBLE | CHIP_HAS_INPUTSEL,
1691 
1692 		.leftreg    = TDA8425_VL,
1693 		.rightreg   = TDA8425_VR,
1694 		.bassreg    = TDA8425_BA,
1695 		.treblereg  = TDA8425_TR,
1696 
1697 		/* callbacks */
1698 		.volfunc    = tda8425_shift10,
1699 		.bassfunc   = tda8425_shift12,
1700 		.treblefunc = tda8425_shift12,
1701 		.setaudmode = tda8425_setaudmode,
1702 
1703 		.inputreg   = TDA8425_S1,
1704 		.inputmap   = { TDA8425_S1_CH1, TDA8425_S1_CH1, TDA8425_S1_CH1 },
1705 		.inputmute  = TDA8425_S1_OFF,
1706 
1707 	},
1708 	{
1709 		.name       = "pic16c54 (PV951)",
1710 		.insmodopt  = &pic16c54,
1711 		.addr_lo    = I2C_ADDR_PIC16C54 >> 1,
1712 		.addr_hi    = I2C_ADDR_PIC16C54>> 1,
1713 		.registers  = 2,
1714 		.flags      = CHIP_HAS_INPUTSEL,
1715 
1716 		.inputreg   = PIC16C54_REG_MISC,
1717 		.inputmap   = {PIC16C54_MISC_SND_NOTMUTE|PIC16C54_MISC_SWITCH_TUNER,
1718 			     PIC16C54_MISC_SND_NOTMUTE|PIC16C54_MISC_SWITCH_LINE,
1719 			     PIC16C54_MISC_SND_NOTMUTE|PIC16C54_MISC_SWITCH_LINE,
1720 			     PIC16C54_MISC_SND_MUTE},
1721 		.inputmute  = PIC16C54_MISC_SND_MUTE,
1722 	},
1723 	{
1724 		.name       = "ta8874z",
1725 		.checkit    = ta8874z_checkit,
1726 		.insmodopt  = &ta8874z,
1727 		.addr_lo    = I2C_ADDR_TDA9840 >> 1,
1728 		.addr_hi    = I2C_ADDR_TDA9840 >> 1,
1729 		.registers  = 2,
1730 
1731 		/* callbacks */
1732 		.getrxsubchans = ta8874z_getrxsubchans,
1733 		.setaudmode = ta8874z_setaudmode,
1734 
1735 		.init       = {2, { TA8874Z_MONO_SET, TA8874Z_SEPARATION_DEFAULT}},
1736 	},
1737 	{ .name = NULL } /* EOF */
1738 };
1739 
1740 
1741 /* ---------------------------------------------------------------------- */
1742 
tvaudio_s_ctrl(struct v4l2_ctrl * ctrl)1743 static int tvaudio_s_ctrl(struct v4l2_ctrl *ctrl)
1744 {
1745 	struct v4l2_subdev *sd = to_sd(ctrl);
1746 	struct CHIPSTATE *chip = to_state(sd);
1747 	struct CHIPDESC *desc = chip->desc;
1748 
1749 	switch (ctrl->id) {
1750 	case V4L2_CID_AUDIO_MUTE:
1751 		chip->muted = ctrl->val;
1752 		if (chip->muted)
1753 			chip_write_masked(chip,desc->inputreg,desc->inputmute,desc->inputmask);
1754 		else
1755 			chip_write_masked(chip,desc->inputreg,
1756 					desc->inputmap[chip->input],desc->inputmask);
1757 		return 0;
1758 	case V4L2_CID_AUDIO_VOLUME: {
1759 		u32 volume, balance;
1760 		u32 left, right;
1761 
1762 		volume = chip->volume->val;
1763 		balance = chip->balance->val;
1764 		left = (min(65536U - balance, 32768U) * volume) / 32768U;
1765 		right = (min(balance, 32768U) * volume) / 32768U;
1766 
1767 		chip_write(chip, desc->leftreg, desc->volfunc(left));
1768 		chip_write(chip, desc->rightreg, desc->volfunc(right));
1769 		return 0;
1770 	}
1771 	case V4L2_CID_AUDIO_BASS:
1772 		chip_write(chip, desc->bassreg, desc->bassfunc(ctrl->val));
1773 		return 0;
1774 	case V4L2_CID_AUDIO_TREBLE:
1775 		chip_write(chip, desc->treblereg, desc->treblefunc(ctrl->val));
1776 		return 0;
1777 	}
1778 	return -EINVAL;
1779 }
1780 
1781 
1782 /* ---------------------------------------------------------------------- */
1783 /* video4linux interface                                                  */
1784 
tvaudio_s_radio(struct v4l2_subdev * sd)1785 static int tvaudio_s_radio(struct v4l2_subdev *sd)
1786 {
1787 	struct CHIPSTATE *chip = to_state(sd);
1788 
1789 	chip->radio = 1;
1790 	/* del_timer(&chip->wt); */
1791 	return 0;
1792 }
1793 
tvaudio_s_routing(struct v4l2_subdev * sd,u32 input,u32 output,u32 config)1794 static int tvaudio_s_routing(struct v4l2_subdev *sd,
1795 			     u32 input, u32 output, u32 config)
1796 {
1797 	struct CHIPSTATE *chip = to_state(sd);
1798 	struct CHIPDESC *desc = chip->desc;
1799 
1800 	if (!(desc->flags & CHIP_HAS_INPUTSEL))
1801 		return 0;
1802 	if (input >= 4)
1803 		return -EINVAL;
1804 	/* There are four inputs: tuner, radio, extern and intern. */
1805 	chip->input = input;
1806 	if (chip->muted)
1807 		return 0;
1808 	chip_write_masked(chip, desc->inputreg,
1809 			desc->inputmap[chip->input], desc->inputmask);
1810 	return 0;
1811 }
1812 
tvaudio_s_tuner(struct v4l2_subdev * sd,const struct v4l2_tuner * vt)1813 static int tvaudio_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
1814 {
1815 	struct CHIPSTATE *chip = to_state(sd);
1816 	struct CHIPDESC *desc = chip->desc;
1817 
1818 	if (!desc->setaudmode)
1819 		return 0;
1820 	if (chip->radio)
1821 		return 0;
1822 
1823 	switch (vt->audmode) {
1824 	case V4L2_TUNER_MODE_MONO:
1825 	case V4L2_TUNER_MODE_STEREO:
1826 	case V4L2_TUNER_MODE_LANG1:
1827 	case V4L2_TUNER_MODE_LANG2:
1828 	case V4L2_TUNER_MODE_LANG1_LANG2:
1829 		break;
1830 	default:
1831 		return -EINVAL;
1832 	}
1833 	chip->audmode = vt->audmode;
1834 
1835 	if (chip->thread)
1836 		wake_up_process(chip->thread);
1837 	else
1838 		desc->setaudmode(chip, vt->audmode);
1839 
1840 	return 0;
1841 }
1842 
tvaudio_g_tuner(struct v4l2_subdev * sd,struct v4l2_tuner * vt)1843 static int tvaudio_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
1844 {
1845 	struct CHIPSTATE *chip = to_state(sd);
1846 	struct CHIPDESC *desc = chip->desc;
1847 
1848 	if (!desc->getrxsubchans)
1849 		return 0;
1850 	if (chip->radio)
1851 		return 0;
1852 
1853 	vt->audmode = chip->audmode;
1854 	vt->rxsubchans = desc->getrxsubchans(chip);
1855 	vt->capability |= V4L2_TUNER_CAP_STEREO |
1856 		V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
1857 
1858 	return 0;
1859 }
1860 
tvaudio_s_std(struct v4l2_subdev * sd,v4l2_std_id std)1861 static int tvaudio_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
1862 {
1863 	struct CHIPSTATE *chip = to_state(sd);
1864 
1865 	chip->radio = 0;
1866 	return 0;
1867 }
1868 
tvaudio_s_frequency(struct v4l2_subdev * sd,const struct v4l2_frequency * freq)1869 static int tvaudio_s_frequency(struct v4l2_subdev *sd, const struct v4l2_frequency *freq)
1870 {
1871 	struct CHIPSTATE *chip = to_state(sd);
1872 	struct CHIPDESC *desc = chip->desc;
1873 
1874 	/* For chips that provide getrxsubchans and setaudmode, and doesn't
1875 	   automatically follows the stereo carrier, a kthread is
1876 	   created to set the audio standard. In this case, when then
1877 	   the video channel is changed, tvaudio starts on MONO mode.
1878 	   After waiting for 2 seconds, the kernel thread is called,
1879 	   to follow whatever audio standard is pointed by the
1880 	   audio carrier.
1881 	 */
1882 	if (chip->thread) {
1883 		desc->setaudmode(chip, V4L2_TUNER_MODE_MONO);
1884 		chip->prevmode = -1; /* reset previous mode */
1885 		mod_timer(&chip->wt, jiffies+msecs_to_jiffies(2000));
1886 	}
1887 	return 0;
1888 }
1889 
tvaudio_log_status(struct v4l2_subdev * sd)1890 static int tvaudio_log_status(struct v4l2_subdev *sd)
1891 {
1892 	struct CHIPSTATE *chip = to_state(sd);
1893 	struct CHIPDESC *desc = chip->desc;
1894 
1895 	v4l2_info(sd, "Chip: %s\n", desc->name);
1896 	v4l2_ctrl_handler_log_status(&chip->hdl, sd->name);
1897 	return 0;
1898 }
1899 
1900 /* ----------------------------------------------------------------------- */
1901 
1902 static const struct v4l2_ctrl_ops tvaudio_ctrl_ops = {
1903 	.s_ctrl = tvaudio_s_ctrl,
1904 };
1905 
1906 static const struct v4l2_subdev_core_ops tvaudio_core_ops = {
1907 	.log_status = tvaudio_log_status,
1908 };
1909 
1910 static const struct v4l2_subdev_tuner_ops tvaudio_tuner_ops = {
1911 	.s_radio = tvaudio_s_radio,
1912 	.s_frequency = tvaudio_s_frequency,
1913 	.s_tuner = tvaudio_s_tuner,
1914 	.g_tuner = tvaudio_g_tuner,
1915 };
1916 
1917 static const struct v4l2_subdev_audio_ops tvaudio_audio_ops = {
1918 	.s_routing = tvaudio_s_routing,
1919 };
1920 
1921 static const struct v4l2_subdev_video_ops tvaudio_video_ops = {
1922 	.s_std = tvaudio_s_std,
1923 };
1924 
1925 static const struct v4l2_subdev_ops tvaudio_ops = {
1926 	.core = &tvaudio_core_ops,
1927 	.tuner = &tvaudio_tuner_ops,
1928 	.audio = &tvaudio_audio_ops,
1929 	.video = &tvaudio_video_ops,
1930 };
1931 
1932 /* ----------------------------------------------------------------------- */
1933 
1934 
1935 /* i2c registration                                                       */
1936 
tvaudio_probe(struct i2c_client * client,const struct i2c_device_id * id)1937 static int tvaudio_probe(struct i2c_client *client, const struct i2c_device_id *id)
1938 {
1939 	struct CHIPSTATE *chip;
1940 	struct CHIPDESC  *desc;
1941 	struct v4l2_subdev *sd;
1942 
1943 	if (debug) {
1944 		printk(KERN_INFO "tvaudio: TV audio decoder + audio/video mux driver\n");
1945 		printk(KERN_INFO "tvaudio: known chips: ");
1946 		for (desc = chiplist; desc->name != NULL; desc++)
1947 			printk(KERN_CONT "%s%s",
1948 			       (desc == chiplist) ? "" : ", ", desc->name);
1949 		printk(KERN_CONT "\n");
1950 	}
1951 
1952 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
1953 	if (!chip)
1954 		return -ENOMEM;
1955 	sd = &chip->sd;
1956 	v4l2_i2c_subdev_init(sd, client, &tvaudio_ops);
1957 
1958 	/* find description for the chip */
1959 	v4l2_dbg(1, debug, sd, "chip found @ 0x%x\n", client->addr<<1);
1960 	for (desc = chiplist; desc->name != NULL; desc++) {
1961 		if (0 == *(desc->insmodopt))
1962 			continue;
1963 		if (client->addr < desc->addr_lo ||
1964 		    client->addr > desc->addr_hi)
1965 			continue;
1966 		if (desc->checkit && !desc->checkit(chip))
1967 			continue;
1968 		break;
1969 	}
1970 	if (desc->name == NULL) {
1971 		v4l2_dbg(1, debug, sd, "no matching chip description found\n");
1972 		return -EIO;
1973 	}
1974 	v4l2_info(sd, "%s found @ 0x%x (%s)\n", desc->name, client->addr<<1, client->adapter->name);
1975 	if (desc->flags) {
1976 		v4l2_dbg(1, debug, sd, "matches:%s%s%s.\n",
1977 			(desc->flags & CHIP_HAS_VOLUME)     ? " volume"      : "",
1978 			(desc->flags & CHIP_HAS_BASSTREBLE) ? " bass/treble" : "",
1979 			(desc->flags & CHIP_HAS_INPUTSEL)   ? " audiomux"    : "");
1980 	}
1981 
1982 	/* fill required data structures */
1983 	if (!id)
1984 		strscpy(client->name, desc->name, I2C_NAME_SIZE);
1985 	chip->desc = desc;
1986 	chip->shadow.count = desc->registers+1;
1987 	chip->prevmode = -1;
1988 	chip->audmode = V4L2_TUNER_MODE_LANG1;
1989 
1990 	/* initialization  */
1991 	if (desc->initialize != NULL)
1992 		desc->initialize(chip);
1993 	else
1994 		chip_cmd(chip, "init", &desc->init);
1995 
1996 	v4l2_ctrl_handler_init(&chip->hdl, 5);
1997 	if (desc->flags & CHIP_HAS_INPUTSEL)
1998 		v4l2_ctrl_new_std(&chip->hdl, &tvaudio_ctrl_ops,
1999 			V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
2000 	if (desc->flags & CHIP_HAS_VOLUME) {
2001 		if (!desc->volfunc) {
2002 			/* This shouldn't be happen. Warn user, but keep working
2003 			   without volume controls
2004 			 */
2005 			v4l2_info(sd, "volume callback undefined!\n");
2006 			desc->flags &= ~CHIP_HAS_VOLUME;
2007 		} else {
2008 			chip->volume = v4l2_ctrl_new_std(&chip->hdl,
2009 				&tvaudio_ctrl_ops, V4L2_CID_AUDIO_VOLUME,
2010 				0, 65535, 65535 / 100,
2011 				desc->volinit ? desc->volinit : 65535);
2012 			chip->balance = v4l2_ctrl_new_std(&chip->hdl,
2013 				&tvaudio_ctrl_ops, V4L2_CID_AUDIO_BALANCE,
2014 				0, 65535, 65535 / 100, 32768);
2015 			v4l2_ctrl_cluster(2, &chip->volume);
2016 		}
2017 	}
2018 	if (desc->flags & CHIP_HAS_BASSTREBLE) {
2019 		if (!desc->bassfunc || !desc->treblefunc) {
2020 			/* This shouldn't be happen. Warn user, but keep working
2021 			   without bass/treble controls
2022 			 */
2023 			v4l2_info(sd, "bass/treble callbacks undefined!\n");
2024 			desc->flags &= ~CHIP_HAS_BASSTREBLE;
2025 		} else {
2026 			v4l2_ctrl_new_std(&chip->hdl,
2027 				&tvaudio_ctrl_ops, V4L2_CID_AUDIO_BASS,
2028 				0, 65535, 65535 / 100,
2029 				desc->bassinit ? desc->bassinit : 32768);
2030 			v4l2_ctrl_new_std(&chip->hdl,
2031 				&tvaudio_ctrl_ops, V4L2_CID_AUDIO_TREBLE,
2032 				0, 65535, 65535 / 100,
2033 				desc->trebleinit ? desc->trebleinit : 32768);
2034 		}
2035 	}
2036 
2037 	sd->ctrl_handler = &chip->hdl;
2038 	if (chip->hdl.error) {
2039 		int err = chip->hdl.error;
2040 
2041 		v4l2_ctrl_handler_free(&chip->hdl);
2042 		return err;
2043 	}
2044 	/* set controls to the default values */
2045 	v4l2_ctrl_handler_setup(&chip->hdl);
2046 
2047 	chip->thread = NULL;
2048 	timer_setup(&chip->wt, chip_thread_wake, 0);
2049 	if (desc->flags & CHIP_NEED_CHECKMODE) {
2050 		if (!desc->getrxsubchans || !desc->setaudmode) {
2051 			/* This shouldn't be happen. Warn user, but keep working
2052 			   without kthread
2053 			 */
2054 			v4l2_info(sd, "set/get mode callbacks undefined!\n");
2055 			return 0;
2056 		}
2057 		/* start async thread */
2058 		chip->thread = kthread_run(chip_thread, chip, "%s",
2059 					   client->name);
2060 		if (IS_ERR(chip->thread)) {
2061 			v4l2_warn(sd, "failed to create kthread\n");
2062 			chip->thread = NULL;
2063 		}
2064 	}
2065 	return 0;
2066 }
2067 
tvaudio_remove(struct i2c_client * client)2068 static int tvaudio_remove(struct i2c_client *client)
2069 {
2070 	struct v4l2_subdev *sd = i2c_get_clientdata(client);
2071 	struct CHIPSTATE *chip = to_state(sd);
2072 
2073 	del_timer_sync(&chip->wt);
2074 	if (chip->thread) {
2075 		/* shutdown async thread */
2076 		kthread_stop(chip->thread);
2077 		chip->thread = NULL;
2078 	}
2079 
2080 	v4l2_device_unregister_subdev(sd);
2081 	v4l2_ctrl_handler_free(&chip->hdl);
2082 	return 0;
2083 }
2084 
2085 /* This driver supports many devices and the idea is to let the driver
2086    detect which device is present. So rather than listing all supported
2087    devices here, we pretend to support a single, fake device type. */
2088 static const struct i2c_device_id tvaudio_id[] = {
2089 	{ "tvaudio", 0 },
2090 	{ }
2091 };
2092 MODULE_DEVICE_TABLE(i2c, tvaudio_id);
2093 
2094 static struct i2c_driver tvaudio_driver = {
2095 	.driver = {
2096 		.name	= "tvaudio",
2097 	},
2098 	.probe		= tvaudio_probe,
2099 	.remove		= tvaudio_remove,
2100 	.id_table	= tvaudio_id,
2101 };
2102 
2103 module_i2c_driver(tvaudio_driver);
2104