1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *
4  * device driver for philips saa7134 based TV cards
5  * tv audio decoder (fm stereo, nicam, ...)
6  *
7  * (c) 2001-03 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
8  */
9 
10 #include "saa7134.h"
11 #include "saa7134-reg.h"
12 
13 #include <linux/init.h>
14 #include <linux/list.h>
15 #include <linux/module.h>
16 #include <linux/kernel.h>
17 #include <linux/kthread.h>
18 #include <linux/delay.h>
19 #include <linux/freezer.h>
20 #include <asm/div64.h>
21 
22 /* ------------------------------------------------------------------ */
23 
24 static unsigned int audio_debug;
25 module_param(audio_debug, int, 0644);
26 MODULE_PARM_DESC(audio_debug,"enable debug messages [tv audio]");
27 
28 static unsigned int audio_ddep;
29 module_param(audio_ddep, int, 0644);
30 MODULE_PARM_DESC(audio_ddep,"audio ddep overwrite");
31 
32 static int audio_clock_override = UNSET;
33 module_param(audio_clock_override, int, 0644);
34 
35 static int audio_clock_tweak;
36 module_param(audio_clock_tweak, int, 0644);
37 MODULE_PARM_DESC(audio_clock_tweak, "Audio clock tick fine tuning for cards with audio crystal that's slightly off (range [-1024 .. 1024])");
38 
39 #define audio_dbg(level, fmt, arg...) do { \
40 	if (audio_debug >= level) \
41 		printk(KERN_DEBUG pr_fmt("audio: " fmt), ## arg); \
42 	} while (0)
43 
44 /* msecs */
45 #define SCAN_INITIAL_DELAY     1000
46 #define SCAN_SAMPLE_DELAY       200
47 #define SCAN_SUBCARRIER_DELAY  2000
48 
49 /* ------------------------------------------------------------------ */
50 /* saa7134 code                                                       */
51 
52 static struct mainscan {
53 	char         *name;
54 	v4l2_std_id  std;
55 	int          carr;
56 } mainscan[] = {
57 	{
58 		.name = "MN",
59 		.std  = V4L2_STD_MN,
60 		.carr = 4500,
61 	},{
62 		.name = "BGH",
63 		.std  = V4L2_STD_B | V4L2_STD_GH,
64 		.carr = 5500,
65 	},{
66 		.name = "I",
67 		.std  = V4L2_STD_PAL_I,
68 		.carr = 6000,
69 	},{
70 		.name = "DKL",
71 		.std  = V4L2_STD_DK | V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC,
72 		.carr = 6500,
73 	}
74 };
75 
76 static struct saa7134_tvaudio tvaudio[] = {
77 	{
78 		.name          = "PAL-B/G FM-stereo",
79 		.std           = V4L2_STD_PAL_BG,
80 		.mode          = TVAUDIO_FM_BG_STEREO,
81 		.carr1         = 5500,
82 		.carr2         = 5742,
83 	},{
84 		.name          = "PAL-D/K1 FM-stereo",
85 		.std           = V4L2_STD_PAL_DK,
86 		.carr1         = 6500,
87 		.carr2         = 6258,
88 		.mode          = TVAUDIO_FM_BG_STEREO,
89 	},{
90 		.name          = "PAL-D/K2 FM-stereo",
91 		.std           = V4L2_STD_PAL_DK,
92 		.carr1         = 6500,
93 		.carr2         = 6742,
94 		.mode          = TVAUDIO_FM_BG_STEREO,
95 	},{
96 		.name          = "PAL-D/K3 FM-stereo",
97 		.std           = V4L2_STD_PAL_DK,
98 		.carr1         = 6500,
99 		.carr2         = 5742,
100 		.mode          = TVAUDIO_FM_BG_STEREO,
101 	},{
102 		.name          = "PAL-B/G NICAM",
103 		.std           = V4L2_STD_PAL_BG,
104 		.carr1         = 5500,
105 		.carr2         = 5850,
106 		.mode          = TVAUDIO_NICAM_FM,
107 	},{
108 		.name          = "PAL-I NICAM",
109 		.std           = V4L2_STD_PAL_I,
110 		.carr1         = 6000,
111 		.carr2         = 6552,
112 		.mode          = TVAUDIO_NICAM_FM,
113 	},{
114 		.name          = "PAL-D/K NICAM",
115 		.std           = V4L2_STD_PAL_DK,
116 		.carr1         = 6500,
117 		.carr2         = 5850,
118 		.mode          = TVAUDIO_NICAM_FM,
119 	},{
120 		.name          = "SECAM-L NICAM",
121 		.std           = V4L2_STD_SECAM_L,
122 		.carr1         = 6500,
123 		.carr2         = 5850,
124 		.mode          = TVAUDIO_NICAM_AM,
125 	},{
126 		.name          = "SECAM-D/K NICAM",
127 		.std           = V4L2_STD_SECAM_DK,
128 		.carr1         = 6500,
129 		.carr2         = 5850,
130 		.mode          = TVAUDIO_NICAM_FM,
131 	},{
132 		.name          = "NTSC-A2 FM-stereo",
133 		.std           = V4L2_STD_NTSC,
134 		.carr1         = 4500,
135 		.carr2         = 4724,
136 		.mode          = TVAUDIO_FM_K_STEREO,
137 	},{
138 		.name          = "NTSC-M",
139 		.std           = V4L2_STD_NTSC,
140 		.carr1         = 4500,
141 		.carr2         = -1,
142 		.mode          = TVAUDIO_FM_MONO,
143 	}
144 };
145 #define TVAUDIO ARRAY_SIZE(tvaudio)
146 
147 /* ------------------------------------------------------------------ */
148 
149 static u32 tvaudio_carr2reg(u32 carrier)
150 {
151 	u64 a = carrier;
152 
153 	a <<= 24;
154 	do_div(a,12288);
155 	return a;
156 }
157 
158 static void tvaudio_setcarrier(struct saa7134_dev *dev,
159 			       int primary, int secondary)
160 {
161 	if (-1 == secondary)
162 		secondary = primary;
163 	saa_writel(SAA7134_CARRIER1_FREQ0 >> 2, tvaudio_carr2reg(primary));
164 	saa_writel(SAA7134_CARRIER2_FREQ0 >> 2, tvaudio_carr2reg(secondary));
165 }
166 
167 #define SAA7134_MUTE_MASK 0xbb
168 #define SAA7134_MUTE_ANALOG 0x04
169 #define SAA7134_MUTE_I2S 0x40
170 
171 static void mute_input_7134(struct saa7134_dev *dev)
172 {
173 	unsigned int mute;
174 	struct saa7134_input *in;
175 	int ausel=0, ics=0, ocs=0;
176 	int mask;
177 
178 	/* look what is to do ... */
179 	in   = dev->input;
180 	mute = (dev->ctl_mute ||
181 		(dev->automute  &&  (&card(dev).radio) != in));
182 	if (card(dev).mute.type) {
183 		/*
184 		 * 7130 - we'll mute using some unconnected audio input
185 		 * 7134 - we'll probably should switch external mux with gpio
186 		 */
187 		if (mute)
188 			in = &card(dev).mute;
189 	}
190 
191 	if (dev->hw_mute  == mute &&
192 		dev->hw_input == in && !dev->insuspend) {
193 		audio_dbg(1, "mute/input: nothing to do [mute=%d,input=%s]\n",
194 			  mute, saa7134_input_name[in->type]);
195 		return;
196 	}
197 
198 	audio_dbg(1, "ctl_mute=%d automute=%d input=%s  =>  mute=%d input=%s\n",
199 		  dev->ctl_mute, dev->automute,
200 		  saa7134_input_name[dev->input->type], mute,
201 		  saa7134_input_name[in->type]);
202 	dev->hw_mute  = mute;
203 	dev->hw_input = in;
204 
205 	if (PCI_DEVICE_ID_PHILIPS_SAA7134 == dev->pci->device)
206 		/* 7134 mute */
207 		saa_writeb(SAA7134_AUDIO_MUTE_CTRL, mute ?
208 						    SAA7134_MUTE_MASK |
209 						    SAA7134_MUTE_ANALOG |
210 						    SAA7134_MUTE_I2S :
211 						    SAA7134_MUTE_MASK);
212 
213 	/* switch internal audio mux */
214 	switch (in->amux) {
215 	case TV:         ausel=0xc0; ics=0x00; ocs=0x02; break;
216 	case LINE1:      ausel=0x80; ics=0x00; ocs=0x00; break;
217 	case LINE2:      ausel=0x80; ics=0x08; ocs=0x01; break;
218 	case LINE2_LEFT: ausel=0x80; ics=0x08; ocs=0x05; break;
219 	}
220 	saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, ausel);
221 	saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x08, ics);
222 	saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x07, ocs);
223 	// for oss, we need to change the clock configuration
224 	if (in->amux == TV)
225 		saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
226 	else
227 		saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x01);
228 
229 	/* switch gpio-connected external audio mux */
230 	if (0 == card(dev).gpiomask)
231 		return;
232 
233 	mask = card(dev).gpiomask;
234 	saa_andorl(SAA7134_GPIO_GPMODE0 >> 2,   mask, mask);
235 	saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, mask, in->gpio);
236 	saa7134_track_gpio(dev, saa7134_input_name[in->type]);
237 }
238 
239 static void tvaudio_setmode(struct saa7134_dev *dev,
240 			    struct saa7134_tvaudio *audio,
241 			    char *note)
242 {
243 	int acpf, tweak = 0;
244 
245 	if (dev->tvnorm->id == V4L2_STD_NTSC) {
246 		acpf = 0x19066;
247 	} else {
248 		acpf = 0x1e000;
249 	}
250 	if (audio_clock_tweak > -1024 && audio_clock_tweak < 1024)
251 		tweak = audio_clock_tweak;
252 
253 	if (note)
254 		audio_dbg(1, "tvaudio_setmode: %s %s [%d.%03d/%d.%03d MHz] acpf=%d%+d\n",
255 			note, audio->name,
256 			audio->carr1 / 1000, audio->carr1 % 1000,
257 			audio->carr2 / 1000, audio->carr2 % 1000,
258 			acpf, tweak);
259 
260 	acpf += tweak;
261 	saa_writeb(SAA7134_AUDIO_CLOCKS_PER_FIELD0, (acpf & 0x0000ff) >> 0);
262 	saa_writeb(SAA7134_AUDIO_CLOCKS_PER_FIELD1, (acpf & 0x00ff00) >> 8);
263 	saa_writeb(SAA7134_AUDIO_CLOCKS_PER_FIELD2, (acpf & 0x030000) >> 16);
264 	tvaudio_setcarrier(dev,audio->carr1,audio->carr2);
265 
266 	switch (audio->mode) {
267 	case TVAUDIO_FM_MONO:
268 	case TVAUDIO_FM_BG_STEREO:
269 		saa_writeb(SAA7134_DEMODULATOR,               0x00);
270 		saa_writeb(SAA7134_DCXO_IDENT_CTRL,           0x00);
271 		saa_writeb(SAA7134_FM_DEEMPHASIS,             0x22);
272 		saa_writeb(SAA7134_FM_DEMATRIX,               0x80);
273 		saa_writeb(SAA7134_STEREO_DAC_OUTPUT_SELECT,  0xa0);
274 		break;
275 	case TVAUDIO_FM_K_STEREO:
276 		saa_writeb(SAA7134_DEMODULATOR,               0x00);
277 		saa_writeb(SAA7134_DCXO_IDENT_CTRL,           0x01);
278 		saa_writeb(SAA7134_FM_DEEMPHASIS,             0x22);
279 		saa_writeb(SAA7134_FM_DEMATRIX,               0x80);
280 		saa_writeb(SAA7134_STEREO_DAC_OUTPUT_SELECT,  0xa0);
281 		break;
282 	case TVAUDIO_NICAM_FM:
283 		saa_writeb(SAA7134_DEMODULATOR,               0x10);
284 		saa_writeb(SAA7134_DCXO_IDENT_CTRL,           0x00);
285 		saa_writeb(SAA7134_FM_DEEMPHASIS,             0x44);
286 		saa_writeb(SAA7134_STEREO_DAC_OUTPUT_SELECT,  0xa1);
287 		saa_writeb(SAA7134_NICAM_CONFIG,              0x00);
288 		break;
289 	case TVAUDIO_NICAM_AM:
290 		saa_writeb(SAA7134_DEMODULATOR,               0x12);
291 		saa_writeb(SAA7134_DCXO_IDENT_CTRL,           0x00);
292 		saa_writeb(SAA7134_FM_DEEMPHASIS,             0x44);
293 		saa_writeb(SAA7134_STEREO_DAC_OUTPUT_SELECT,  0xa1);
294 		saa_writeb(SAA7134_NICAM_CONFIG,              0x00);
295 		break;
296 	case TVAUDIO_FM_SAT_STEREO:
297 		/* not implemented (yet) */
298 		break;
299 	}
300 }
301 
302 static int tvaudio_sleep(struct saa7134_dev *dev, int timeout)
303 {
304 	if (dev->thread.scan1 == dev->thread.scan2 &&
305 	    !kthread_should_stop()) {
306 		if (timeout < 0) {
307 			set_current_state(TASK_INTERRUPTIBLE);
308 			schedule();
309 		} else {
310 			schedule_timeout_interruptible
311 						(msecs_to_jiffies(timeout));
312 		}
313 	}
314 	return dev->thread.scan1 != dev->thread.scan2;
315 }
316 
317 static int tvaudio_checkcarrier(struct saa7134_dev *dev, struct mainscan *scan)
318 {
319 	__s32 left,right,value;
320 
321 	if (!(dev->tvnorm->id & scan->std)) {
322 		audio_dbg(1, "skipping %d.%03d MHz [%4s]\n",
323 			  scan->carr / 1000, scan->carr % 1000, scan->name);
324 		return 0;
325 	}
326 
327 	if (audio_debug > 1) {
328 		int i;
329 		audio_dbg(1, "debug %d:", scan->carr);
330 		for (i = -150; i <= 150; i += 30) {
331 			tvaudio_setcarrier(dev,scan->carr+i,scan->carr+i);
332 			saa_readl(SAA7134_LEVEL_READOUT1 >> 2);
333 			if (tvaudio_sleep(dev,SCAN_SAMPLE_DELAY))
334 				return -1;
335 			value = saa_readl(SAA7134_LEVEL_READOUT1 >> 2);
336 			if (0 == i)
337 				pr_cont("  #  %6d  # ", value >> 16);
338 			else
339 				pr_cont(" %6d", value >> 16);
340 		}
341 		pr_cont("\n");
342 	}
343 
344 	tvaudio_setcarrier(dev,scan->carr-90,scan->carr-90);
345 	saa_readl(SAA7134_LEVEL_READOUT1 >> 2);
346 	if (tvaudio_sleep(dev,SCAN_SAMPLE_DELAY))
347 		return -1;
348 	left = saa_readl(SAA7134_LEVEL_READOUT1 >> 2);
349 
350 	tvaudio_setcarrier(dev,scan->carr+90,scan->carr+90);
351 	saa_readl(SAA7134_LEVEL_READOUT1 >> 2);
352 	if (tvaudio_sleep(dev,SCAN_SAMPLE_DELAY))
353 		return -1;
354 	right = saa_readl(SAA7134_LEVEL_READOUT1 >> 2);
355 
356 	left >>= 16;
357 	right >>= 16;
358 	value = left > right ? left - right : right - left;
359 	audio_dbg(1, "scanning %d.%03d MHz [%4s] =>  dc is %5d [%d/%d]\n",
360 		  scan->carr / 1000, scan->carr % 1000,
361 		  scan->name, value, left, right);
362 	return value;
363 }
364 
365 
366 static int tvaudio_getstereo(struct saa7134_dev *dev, struct saa7134_tvaudio *audio)
367 {
368 	__u32 idp, nicam, nicam_status;
369 	int retval = -1;
370 
371 	switch (audio->mode) {
372 	case TVAUDIO_FM_MONO:
373 		return V4L2_TUNER_SUB_MONO;
374 	case TVAUDIO_FM_K_STEREO:
375 	case TVAUDIO_FM_BG_STEREO:
376 		idp = (saa_readb(SAA7134_IDENT_SIF) & 0xe0) >> 5;
377 		audio_dbg(1, "getstereo: fm/stereo: idp=0x%x\n", idp);
378 		if (0x03 == (idp & 0x03))
379 			retval = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
380 		else if (0x05 == (idp & 0x05))
381 			retval = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
382 		else if (0x01 == (idp & 0x01))
383 			retval = V4L2_TUNER_SUB_MONO;
384 		break;
385 	case TVAUDIO_FM_SAT_STEREO:
386 		/* not implemented (yet) */
387 		break;
388 	case TVAUDIO_NICAM_FM:
389 	case TVAUDIO_NICAM_AM:
390 		nicam = saa_readb(SAA7134_AUDIO_STATUS);
391 		audio_dbg(1, "getstereo: nicam=0x%x\n", nicam);
392 		if (nicam & 0x1) {
393 			nicam_status = saa_readb(SAA7134_NICAM_STATUS);
394 			audio_dbg(1, "getstereo: nicam_status=0x%x\n",
395 				  nicam_status);
396 
397 			switch (nicam_status & 0x03) {
398 			    case 0x01:
399 				retval = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
400 				break;
401 			    case 0x02:
402 				retval = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
403 				break;
404 			    default:
405 				retval = V4L2_TUNER_SUB_MONO;
406 			}
407 		} else {
408 			/* No nicam detected */
409 		}
410 		break;
411 	}
412 	if (retval != -1)
413 		audio_dbg(1, "found audio subchannels:%s%s%s%s\n",
414 			(retval & V4L2_TUNER_SUB_MONO)   ? " mono"   : "",
415 			(retval & V4L2_TUNER_SUB_STEREO) ? " stereo" : "",
416 			(retval & V4L2_TUNER_SUB_LANG1)  ? " lang1"  : "",
417 			(retval & V4L2_TUNER_SUB_LANG2)  ? " lang2"  : "");
418 	return retval;
419 }
420 
421 static int tvaudio_setstereo(struct saa7134_dev *dev, struct saa7134_tvaudio *audio,
422 			     u32 mode)
423 {
424 	static char *name[] = {
425 		[ V4L2_TUNER_MODE_MONO   ] = "mono",
426 		[ V4L2_TUNER_MODE_STEREO ] = "stereo",
427 		[ V4L2_TUNER_MODE_LANG1  ] = "lang1",
428 		[ V4L2_TUNER_MODE_LANG2  ] = "lang2",
429 		[ V4L2_TUNER_MODE_LANG1_LANG2  ] = "lang1+lang2",
430 	};
431 	static u32 fm[] = {
432 		[ V4L2_TUNER_MODE_MONO   ] = 0x00,  /* ch1  */
433 		[ V4L2_TUNER_MODE_STEREO ] = 0x80,  /* auto */
434 		[ V4L2_TUNER_MODE_LANG1  ] = 0x00,  /* ch1  */
435 		[ V4L2_TUNER_MODE_LANG2  ] = 0x01,  /* ch2  */
436 		[ V4L2_TUNER_MODE_LANG1_LANG2 ] = 0x80,  /* auto */
437 	};
438 	u32 reg;
439 
440 	switch (audio->mode) {
441 	case TVAUDIO_FM_MONO:
442 		/* nothing to do ... */
443 		break;
444 	case TVAUDIO_FM_K_STEREO:
445 	case TVAUDIO_FM_BG_STEREO:
446 	case TVAUDIO_NICAM_AM:
447 	case TVAUDIO_NICAM_FM:
448 		audio_dbg(1, "setstereo [fm] => %s\n",
449 			  name[mode % ARRAY_SIZE(name)]);
450 		reg = fm[ mode % ARRAY_SIZE(fm) ];
451 		saa_writeb(SAA7134_FM_DEMATRIX, reg);
452 		break;
453 	case TVAUDIO_FM_SAT_STEREO:
454 		/* Not implemented */
455 		break;
456 	}
457 	return 0;
458 }
459 
460 static int tvaudio_thread(void *data)
461 {
462 	struct saa7134_dev *dev = data;
463 	int carr_vals[ARRAY_SIZE(mainscan)];
464 	unsigned int i, audio, nscan;
465 	int max1,max2,carrier,rx,mode,lastmode,default_carrier;
466 
467 	set_freezable();
468 
469 	for (;;) {
470 		tvaudio_sleep(dev,-1);
471 		if (kthread_should_stop())
472 			goto done;
473 
474 	restart:
475 		try_to_freeze();
476 
477 		dev->thread.scan1 = dev->thread.scan2;
478 		audio_dbg(1, "tvaudio thread scan start [%d]\n",
479 			  dev->thread.scan1);
480 		dev->tvaudio  = NULL;
481 
482 		saa_writeb(SAA7134_MONITOR_SELECT,   0xa0);
483 		saa_writeb(SAA7134_FM_DEMATRIX,      0x80);
484 
485 		if (dev->ctl_automute)
486 			dev->automute = 1;
487 
488 		mute_input_7134(dev);
489 
490 		/* give the tuner some time */
491 		if (tvaudio_sleep(dev,SCAN_INITIAL_DELAY))
492 			goto restart;
493 
494 		max1 = 0;
495 		max2 = 0;
496 		nscan = 0;
497 		carrier = 0;
498 		default_carrier = 0;
499 		for (i = 0; i < ARRAY_SIZE(mainscan); i++) {
500 			if (!(dev->tvnorm->id & mainscan[i].std))
501 				continue;
502 			if (!default_carrier)
503 				default_carrier = mainscan[i].carr;
504 			nscan++;
505 		}
506 
507 		if (1 == nscan) {
508 			/* only one candidate -- skip scan ;) */
509 			audio_dbg(1, "only one main carrier candidate - skipping scan\n");
510 			max1 = 12345;
511 			carrier = default_carrier;
512 		} else {
513 			/* scan for the main carrier */
514 			saa_writeb(SAA7134_MONITOR_SELECT,0x00);
515 			tvaudio_setmode(dev,&tvaudio[0],NULL);
516 			for (i = 0; i < ARRAY_SIZE(mainscan); i++) {
517 				carr_vals[i] = tvaudio_checkcarrier(dev, mainscan+i);
518 				if (dev->thread.scan1 != dev->thread.scan2)
519 					goto restart;
520 			}
521 			for (max1 = 0, max2 = 0, i = 0; i < ARRAY_SIZE(mainscan); i++) {
522 				if (max1 < carr_vals[i]) {
523 					max2 = max1;
524 					max1 = carr_vals[i];
525 					carrier = mainscan[i].carr;
526 				} else if (max2 < carr_vals[i]) {
527 					max2 = carr_vals[i];
528 				}
529 			}
530 		}
531 
532 		if (0 != carrier && max1 > 2000 && max1 > max2*3) {
533 			/* found good carrier */
534 			audio_dbg(1, "found %s main sound carrier @ %d.%03d MHz [%d/%d]\n",
535 				  dev->tvnorm->name, carrier/1000, carrier%1000,
536 				  max1, max2);
537 			dev->last_carrier = carrier;
538 			dev->automute = 0;
539 
540 		} else if (0 != dev->last_carrier) {
541 			/* no carrier -- try last detected one as fallback */
542 			carrier = dev->last_carrier;
543 			audio_dbg(1, "audio carrier scan failed, using %d.%03d MHz [last detected]\n",
544 				  carrier/1000, carrier%1000);
545 			dev->automute = 1;
546 
547 		} else {
548 			/* no carrier + no fallback -- use default */
549 			carrier = default_carrier;
550 			audio_dbg(1, "audio carrier scan failed, using %d.%03d MHz [default]\n",
551 				  carrier/1000, carrier%1000);
552 			dev->automute = 1;
553 		}
554 		tvaudio_setcarrier(dev,carrier,carrier);
555 		saa_andorb(SAA7134_STEREO_DAC_OUTPUT_SELECT, 0x30, 0x00);
556 		saa7134_tvaudio_setmute(dev);
557 		/* find the exact tv audio norm */
558 		for (audio = UNSET, i = 0; i < TVAUDIO; i++) {
559 			if (dev->tvnorm->id != UNSET &&
560 				!(dev->tvnorm->id & tvaudio[i].std))
561 				continue;
562 			if (tvaudio[i].carr1 != carrier)
563 				continue;
564 			/* Note: at least the primary carrier is right here */
565 			if (UNSET == audio)
566 				audio = i;
567 			tvaudio_setmode(dev,&tvaudio[i],"trying");
568 			if (tvaudio_sleep(dev,SCAN_SUBCARRIER_DELAY))
569 				goto restart;
570 			if (-1 != tvaudio_getstereo(dev,&tvaudio[i])) {
571 				audio = i;
572 				break;
573 			}
574 		}
575 		saa_andorb(SAA7134_STEREO_DAC_OUTPUT_SELECT, 0x30, 0x30);
576 		if (UNSET == audio)
577 			continue;
578 		tvaudio_setmode(dev,&tvaudio[audio],"using");
579 
580 		tvaudio_setstereo(dev,&tvaudio[audio],V4L2_TUNER_MODE_MONO);
581 		dev->tvaudio = &tvaudio[audio];
582 
583 		lastmode = 42;
584 		for (;;) {
585 
586 			try_to_freeze();
587 
588 			if (tvaudio_sleep(dev,5000))
589 				goto restart;
590 			if (kthread_should_stop())
591 				break;
592 			if (UNSET == dev->thread.mode) {
593 				rx = tvaudio_getstereo(dev, &tvaudio[audio]);
594 				mode = saa7134_tvaudio_rx2mode(rx);
595 			} else {
596 				mode = dev->thread.mode;
597 			}
598 			if (lastmode != mode) {
599 				tvaudio_setstereo(dev,&tvaudio[audio],mode);
600 				lastmode = mode;
601 			}
602 		}
603 	}
604 
605  done:
606 	dev->thread.stopped = 1;
607 	return 0;
608 }
609 
610 /* ------------------------------------------------------------------ */
611 /* saa7133 / saa7135 code                                             */
612 
613 static char *stdres[0x20] = {
614 	[0x00] = "no standard detected",
615 	[0x01] = "B/G (in progress)",
616 	[0x02] = "D/K (in progress)",
617 	[0x03] = "M (in progress)",
618 
619 	[0x04] = "B/G A2",
620 	[0x05] = "B/G NICAM",
621 	[0x06] = "D/K A2 (1)",
622 	[0x07] = "D/K A2 (2)",
623 	[0x08] = "D/K A2 (3)",
624 	[0x09] = "D/K NICAM",
625 	[0x0a] = "L NICAM",
626 	[0x0b] = "I NICAM",
627 
628 	[0x0c] = "M Korea",
629 	[0x0d] = "M BTSC ",
630 	[0x0e] = "M EIAJ",
631 
632 	[0x0f] = "FM radio / IF 10.7 / 50 deemp",
633 	[0x10] = "FM radio / IF 10.7 / 75 deemp",
634 	[0x11] = "FM radio / IF sel / 50 deemp",
635 	[0x12] = "FM radio / IF sel / 75 deemp",
636 
637 	[0x13 ... 0x1e ] = "unknown",
638 	[0x1f] = "??? [in progress]",
639 };
640 
641 #define DSP_RETRY 32
642 #define DSP_DELAY 16
643 #define SAA7135_DSP_RWCLEAR_RERR 1
644 
645 static inline int saa_dsp_reset_error_bit(struct saa7134_dev *dev)
646 {
647 	int state = saa_readb(SAA7135_DSP_RWSTATE);
648 	if (unlikely(state & SAA7135_DSP_RWSTATE_ERR)) {
649 		audio_dbg(2, "%s: resetting error bit\n", dev->name);
650 		saa_writeb(SAA7135_DSP_RWCLEAR, SAA7135_DSP_RWCLEAR_RERR);
651 	}
652 	return 0;
653 }
654 
655 static inline int saa_dsp_wait_bit(struct saa7134_dev *dev, int bit)
656 {
657 	int state, count = DSP_RETRY;
658 
659 	state = saa_readb(SAA7135_DSP_RWSTATE);
660 	if (unlikely(state & SAA7135_DSP_RWSTATE_ERR)) {
661 		pr_warn("%s: dsp access error\n", dev->name);
662 		saa_dsp_reset_error_bit(dev);
663 		return -EIO;
664 	}
665 	while (0 == (state & bit)) {
666 		if (unlikely(0 == count)) {
667 			pr_err("dsp access wait timeout [bit=%s]\n",
668 				 (bit & SAA7135_DSP_RWSTATE_WRR) ? "WRR" :
669 				 (bit & SAA7135_DSP_RWSTATE_RDB) ? "RDB" :
670 				 (bit & SAA7135_DSP_RWSTATE_IDA) ? "IDA" :
671 				 "???");
672 			return -EIO;
673 		}
674 		saa_wait(DSP_DELAY);
675 		state = saa_readb(SAA7135_DSP_RWSTATE);
676 		count--;
677 	}
678 	return 0;
679 }
680 
681 
682 int saa_dsp_writel(struct saa7134_dev *dev, int reg, u32 value)
683 {
684 	int err;
685 
686 	audio_dbg(2, "dsp write reg 0x%x = 0x%06x\n",
687 		  (reg << 2) & 0xffffffff, value);
688 	err = saa_dsp_wait_bit(dev,SAA7135_DSP_RWSTATE_WRR);
689 	if (err < 0)
690 		return err;
691 	saa_writel(reg,value);
692 	err = saa_dsp_wait_bit(dev,SAA7135_DSP_RWSTATE_WRR);
693 	if (err < 0)
694 		return err;
695 	return 0;
696 }
697 
698 static int getstereo_7133(struct saa7134_dev *dev)
699 {
700 	int retval = V4L2_TUNER_SUB_MONO;
701 	u32 value;
702 
703 	value = saa_readl(0x528 >> 2);
704 	if (value & 0x20)
705 		retval = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
706 	if (value & 0x40)
707 		retval = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
708 	return retval;
709 }
710 
711 static int mute_input_7133(struct saa7134_dev *dev)
712 {
713 	u32 reg = 0;
714 	u32 xbarin, xbarout;
715 	int mask;
716 	struct saa7134_input *in;
717 
718 	xbarin = 0x03;
719 	switch (dev->input->amux) {
720 	case TV:
721 		reg = 0x02;
722 		xbarin = 0;
723 		break;
724 	case LINE1:
725 		reg = 0x00;
726 		break;
727 	case LINE2:
728 	case LINE2_LEFT:
729 		reg = 0x09;
730 		break;
731 	}
732 	saa_dsp_writel(dev, 0x464 >> 2, xbarin);
733 	if (dev->ctl_mute) {
734 		reg = 0x07;
735 		xbarout = 0xbbbbbb;
736 	} else
737 		xbarout = 0xbbbb10;
738 	saa_dsp_writel(dev, 0x46c >> 2, xbarout);
739 
740 	saa_writel(0x594 >> 2, reg);
741 
742 
743 	/* switch gpio-connected external audio mux */
744 	if (0 != card(dev).gpiomask) {
745 		mask = card(dev).gpiomask;
746 
747 		if (card(dev).mute.type && dev->ctl_mute)
748 			in = &card(dev).mute;
749 		else
750 			in = dev->input;
751 
752 		saa_andorl(SAA7134_GPIO_GPMODE0 >> 2,   mask, mask);
753 		saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, mask, in->gpio);
754 		saa7134_track_gpio(dev, saa7134_input_name[in->type]);
755 	}
756 
757 	return 0;
758 }
759 
760 static int tvaudio_thread_ddep(void *data)
761 {
762 	struct saa7134_dev *dev = data;
763 	u32 value, norms;
764 
765 	set_freezable();
766 	for (;;) {
767 		tvaudio_sleep(dev,-1);
768 		if (kthread_should_stop())
769 			goto done;
770 	restart:
771 		try_to_freeze();
772 
773 		dev->thread.scan1 = dev->thread.scan2;
774 		audio_dbg(1, "tvaudio thread scan start [%d]\n",
775 			  dev->thread.scan1);
776 
777 		if (audio_ddep >= 0x04 && audio_ddep <= 0x0e) {
778 			/* insmod option override */
779 			norms = (audio_ddep << 2) | 0x01;
780 			audio_dbg(1, "ddep override: %s\n",
781 				  stdres[audio_ddep]);
782 		} else if (&card(dev).radio == dev->input) {
783 			audio_dbg(1, "FM Radio\n");
784 			if (dev->tuner_type == TUNER_PHILIPS_TDA8290) {
785 				norms = (0x11 << 2) | 0x01;
786 				/* set IF frequency to 5.5 MHz */
787 				saa_dsp_writel(dev, 0x42c >> 2, 0x729555);
788 			} else {
789 				norms = (0x0f << 2) | 0x01;
790 			}
791 		} else {
792 			/* (let chip) scan for sound carrier */
793 			norms = 0;
794 			if (dev->tvnorm->id & (V4L2_STD_B | V4L2_STD_GH))
795 				norms |= 0x04;
796 			if (dev->tvnorm->id & V4L2_STD_PAL_I)
797 				norms |= 0x20;
798 			if (dev->tvnorm->id & V4L2_STD_DK)
799 				norms |= 0x08;
800 			if (dev->tvnorm->id & V4L2_STD_MN)
801 				norms |= 0x40;
802 			if (dev->tvnorm->id & (V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC))
803 				norms |= 0x10;
804 			if (0 == norms)
805 				norms = 0x7c; /* all */
806 			audio_dbg(1, "scanning:%s%s%s%s%s\n",
807 				  (norms & 0x04) ? " B/G"  : "",
808 				  (norms & 0x08) ? " D/K"  : "",
809 				  (norms & 0x10) ? " L/L'" : "",
810 				  (norms & 0x20) ? " I"    : "",
811 				  (norms & 0x40) ? " M"    : "");
812 		}
813 
814 		/* kick automatic standard detection */
815 		saa_dsp_writel(dev, 0x454 >> 2, 0);
816 		saa_dsp_writel(dev, 0x454 >> 2, norms | 0x80);
817 
818 		/* setup crossbars */
819 		saa_dsp_writel(dev, 0x464 >> 2, 0x000000);
820 		saa_dsp_writel(dev, 0x470 >> 2, 0x101010);
821 
822 		if (tvaudio_sleep(dev,3000))
823 			goto restart;
824 		value = saa_readl(0x528 >> 2) & 0xffffff;
825 
826 		audio_dbg(1, "tvaudio thread status: 0x%x [%s%s%s]\n",
827 			  value, stdres[value & 0x1f],
828 			  (value & 0x000020) ? ",stereo" : "",
829 			  (value & 0x000040) ? ",dual"   : "");
830 		audio_dbg(1, "detailed status: %s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s\n",
831 			  (value & 0x000080) ? " A2/EIAJ pilot tone "     : "",
832 			  (value & 0x000100) ? " A2/EIAJ dual "           : "",
833 			  (value & 0x000200) ? " A2/EIAJ stereo "         : "",
834 			  (value & 0x000400) ? " A2/EIAJ noise mute "     : "",
835 
836 			  (value & 0x000800) ? " BTSC/FM radio pilot "    : "",
837 			  (value & 0x001000) ? " SAP carrier "            : "",
838 			  (value & 0x002000) ? " BTSC stereo noise mute " : "",
839 			  (value & 0x004000) ? " SAP noise mute "         : "",
840 			  (value & 0x008000) ? " VDSP "                   : "",
841 
842 			  (value & 0x010000) ? " NICST "                  : "",
843 			  (value & 0x020000) ? " NICDU "                  : "",
844 			  (value & 0x040000) ? " NICAM muted "            : "",
845 			  (value & 0x080000) ? " NICAM reserve sound "    : "",
846 
847 			  (value & 0x100000) ? " init done "              : "");
848 	}
849 
850  done:
851 	dev->thread.stopped = 1;
852 	return 0;
853 }
854 
855 /* ------------------------------------------------------------------ */
856 /* common stuff + external entry points                               */
857 
858 void saa7134_enable_i2s(struct saa7134_dev *dev)
859 {
860 	int i2s_format;
861 
862 	if (!card_is_empress(dev))
863 		return;
864 
865 	if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130)
866 		return;
867 
868 	/* configure GPIO for out */
869 	saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, 0x0E000000, 0x00000000);
870 
871 	switch (dev->pci->device) {
872 	case PCI_DEVICE_ID_PHILIPS_SAA7133:
873 	case PCI_DEVICE_ID_PHILIPS_SAA7135:
874 		/* Set I2S format (SONY) */
875 		saa_writeb(SAA7133_I2S_AUDIO_CONTROL, 0x00);
876 		/* Start I2S */
877 		saa_writeb(SAA7134_I2S_AUDIO_OUTPUT, 0x11);
878 		break;
879 
880 	case PCI_DEVICE_ID_PHILIPS_SAA7134:
881 		i2s_format = (dev->input->amux == TV) ? 0x00 : 0x01;
882 
883 		/* enable I2S audio output for the mpeg encoder */
884 		saa_writeb(SAA7134_I2S_OUTPUT_SELECT, 0x80);
885 		saa_writeb(SAA7134_I2S_OUTPUT_FORMAT, i2s_format);
886 		saa_writeb(SAA7134_I2S_OUTPUT_LEVEL,  0x0F);
887 		saa_writeb(SAA7134_I2S_AUDIO_OUTPUT,  0x01);
888 		break;
889 
890 	default:
891 		break;
892 	}
893 }
894 
895 int saa7134_tvaudio_rx2mode(u32 rx)
896 {
897 	u32 mode;
898 
899 	mode = V4L2_TUNER_MODE_MONO;
900 	if (rx & V4L2_TUNER_SUB_STEREO)
901 		mode = V4L2_TUNER_MODE_STEREO;
902 	else if (rx & V4L2_TUNER_SUB_LANG1)
903 		mode = V4L2_TUNER_MODE_LANG1;
904 	else if (rx & V4L2_TUNER_SUB_LANG2)
905 		mode = V4L2_TUNER_MODE_LANG2;
906 	return mode;
907 }
908 
909 void saa7134_tvaudio_setmute(struct saa7134_dev *dev)
910 {
911 	switch (dev->pci->device) {
912 	case PCI_DEVICE_ID_PHILIPS_SAA7130:
913 	case PCI_DEVICE_ID_PHILIPS_SAA7134:
914 		mute_input_7134(dev);
915 		break;
916 	case PCI_DEVICE_ID_PHILIPS_SAA7133:
917 	case PCI_DEVICE_ID_PHILIPS_SAA7135:
918 		mute_input_7133(dev);
919 		break;
920 	}
921 }
922 
923 void saa7134_tvaudio_setinput(struct saa7134_dev *dev,
924 			      struct saa7134_input *in)
925 {
926 	dev->input = in;
927 	switch (dev->pci->device) {
928 	case PCI_DEVICE_ID_PHILIPS_SAA7130:
929 	case PCI_DEVICE_ID_PHILIPS_SAA7134:
930 		mute_input_7134(dev);
931 		break;
932 	case PCI_DEVICE_ID_PHILIPS_SAA7133:
933 	case PCI_DEVICE_ID_PHILIPS_SAA7135:
934 		mute_input_7133(dev);
935 		break;
936 	}
937 	saa7134_enable_i2s(dev);
938 }
939 
940 void saa7134_tvaudio_setvolume(struct saa7134_dev *dev, int level)
941 {
942 	switch (dev->pci->device) {
943 	case PCI_DEVICE_ID_PHILIPS_SAA7134:
944 		saa_writeb(SAA7134_CHANNEL1_LEVEL,     level & 0x1f);
945 		saa_writeb(SAA7134_CHANNEL2_LEVEL,     level & 0x1f);
946 		saa_writeb(SAA7134_NICAM_LEVEL_ADJUST, level & 0x1f);
947 		break;
948 	}
949 }
950 
951 int saa7134_tvaudio_getstereo(struct saa7134_dev *dev)
952 {
953 	int retval = V4L2_TUNER_SUB_MONO;
954 
955 	switch (dev->pci->device) {
956 	case PCI_DEVICE_ID_PHILIPS_SAA7134:
957 		if (dev->tvaudio)
958 			retval = tvaudio_getstereo(dev,dev->tvaudio);
959 		break;
960 	case PCI_DEVICE_ID_PHILIPS_SAA7133:
961 	case PCI_DEVICE_ID_PHILIPS_SAA7135:
962 		retval = getstereo_7133(dev);
963 		break;
964 	}
965 	return retval;
966 }
967 
968 void saa7134_tvaudio_init(struct saa7134_dev *dev)
969 {
970 	int clock = saa7134_boards[dev->board].audio_clock;
971 
972 	if (UNSET != audio_clock_override)
973 		clock = audio_clock_override;
974 
975 	switch (dev->pci->device) {
976 	case PCI_DEVICE_ID_PHILIPS_SAA7134:
977 		/* init all audio registers */
978 		saa_writeb(SAA7134_AUDIO_PLL_CTRL,   0x00);
979 		if (need_resched())
980 			schedule();
981 		else
982 			udelay(10);
983 
984 		saa_writeb(SAA7134_AUDIO_CLOCK0,      clock        & 0xff);
985 		saa_writeb(SAA7134_AUDIO_CLOCK1,     (clock >>  8) & 0xff);
986 		saa_writeb(SAA7134_AUDIO_CLOCK2,     (clock >> 16) & 0xff);
987 		/* frame locked audio is mandatory for NICAM */
988 		saa_writeb(SAA7134_AUDIO_PLL_CTRL,   0x01);
989 		saa_writeb(SAA7134_NICAM_ERROR_LOW,  0x14);
990 		saa_writeb(SAA7134_NICAM_ERROR_HIGH, 0x50);
991 		break;
992 	case PCI_DEVICE_ID_PHILIPS_SAA7133:
993 	case PCI_DEVICE_ID_PHILIPS_SAA7135:
994 		saa_writel(0x598 >> 2, clock);
995 		saa_dsp_writel(dev, 0x474 >> 2, 0x00);
996 		saa_dsp_writel(dev, 0x450 >> 2, 0x00);
997 	}
998 }
999 
1000 int saa7134_tvaudio_init2(struct saa7134_dev *dev)
1001 {
1002 	int (*my_thread)(void *data) = NULL;
1003 
1004 	switch (dev->pci->device) {
1005 	case PCI_DEVICE_ID_PHILIPS_SAA7134:
1006 		my_thread = tvaudio_thread;
1007 		break;
1008 	case PCI_DEVICE_ID_PHILIPS_SAA7133:
1009 	case PCI_DEVICE_ID_PHILIPS_SAA7135:
1010 		my_thread = tvaudio_thread_ddep;
1011 		break;
1012 	}
1013 
1014 	dev->thread.thread = NULL;
1015 	dev->thread.scan1 = dev->thread.scan2 = 0;
1016 	if (my_thread) {
1017 		saa7134_tvaudio_init(dev);
1018 		/* start tvaudio thread */
1019 		dev->thread.thread = kthread_run(my_thread, dev, "%s", dev->name);
1020 		if (IS_ERR(dev->thread.thread)) {
1021 			pr_warn("%s: kernel_thread() failed\n",
1022 			       dev->name);
1023 			/* XXX: missing error handling here */
1024 		}
1025 	}
1026 
1027 	saa7134_enable_i2s(dev);
1028 	return 0;
1029 }
1030 
1031 int saa7134_tvaudio_close(struct saa7134_dev *dev)
1032 {
1033 	dev->automute = 1;
1034 	/* anything else to undo? */
1035 	return 0;
1036 }
1037 
1038 int saa7134_tvaudio_fini(struct saa7134_dev *dev)
1039 {
1040 	/* shutdown tvaudio thread */
1041 	if (dev->thread.thread && !dev->thread.stopped)
1042 		kthread_stop(dev->thread.thread);
1043 
1044 	saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x07, 0x00); /* LINE1 */
1045 	return 0;
1046 }
1047 
1048 int saa7134_tvaudio_do_scan(struct saa7134_dev *dev)
1049 {
1050 	if (dev->input->amux != TV) {
1051 		audio_dbg(1, "sound IF not in use, skipping scan\n");
1052 		dev->automute = 0;
1053 		saa7134_tvaudio_setmute(dev);
1054 	} else if (dev->thread.thread) {
1055 		dev->thread.mode = UNSET;
1056 		dev->thread.scan2++;
1057 
1058 		if (!dev->insuspend && !dev->thread.stopped)
1059 			wake_up_process(dev->thread.thread);
1060 	} else {
1061 		dev->automute = 0;
1062 		saa7134_tvaudio_setmute(dev);
1063 	}
1064 	return 0;
1065 }
1066 
1067 EXPORT_SYMBOL(saa_dsp_writel);
1068 EXPORT_SYMBOL(saa7134_tvaudio_setmute);
1069