xref: /openbmc/linux/sound/pci/trident/trident_main.c (revision ccd51b9f)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  Maintained by Jaroslav Kysela <perex@perex.cz>
4  *  Originated by audio@tridentmicro.com
5  *  Fri Feb 19 15:55:28 MST 1999
6  *  Routines for control of Trident 4DWave (DX and NX) chip
7  *
8  *  BUGS:
9  *
10  *  TODO:
11  *    ---
12  *
13  *  SiS7018 S/PDIF support by Thomas Winischhofer <thomas@winischhofer.net>
14  */
15 
16 #include <linux/delay.h>
17 #include <linux/init.h>
18 #include <linux/interrupt.h>
19 #include <linux/pci.h>
20 #include <linux/slab.h>
21 #include <linux/vmalloc.h>
22 #include <linux/gameport.h>
23 #include <linux/dma-mapping.h>
24 #include <linux/export.h>
25 #include <linux/io.h>
26 
27 #include <sound/core.h>
28 #include <sound/info.h>
29 #include <sound/control.h>
30 #include <sound/tlv.h>
31 #include "trident.h"
32 #include <sound/asoundef.h>
33 
34 static int snd_trident_pcm_mixer_build(struct snd_trident *trident,
35 				       struct snd_trident_voice * voice,
36 				       struct snd_pcm_substream *substream);
37 static int snd_trident_pcm_mixer_free(struct snd_trident *trident,
38 				      struct snd_trident_voice * voice,
39 				      struct snd_pcm_substream *substream);
40 static irqreturn_t snd_trident_interrupt(int irq, void *dev_id);
41 static int snd_trident_sis_reset(struct snd_trident *trident);
42 
43 static void snd_trident_clear_voices(struct snd_trident * trident,
44 				     unsigned short v_min, unsigned short v_max);
45 static int snd_trident_free(struct snd_trident *trident);
46 
47 /*
48  *  common I/O routines
49  */
50 
51 
52 #if 0
53 static void snd_trident_print_voice_regs(struct snd_trident *trident, int voice)
54 {
55 	unsigned int val, tmp;
56 
57 	dev_dbg(trident->card->dev, "Trident voice %i:\n", voice);
58 	outb(voice, TRID_REG(trident, T4D_LFO_GC_CIR));
59 	val = inl(TRID_REG(trident, CH_LBA));
60 	dev_dbg(trident->card->dev, "LBA: 0x%x\n", val);
61 	val = inl(TRID_REG(trident, CH_GVSEL_PAN_VOL_CTRL_EC));
62 	dev_dbg(trident->card->dev, "GVSel: %i\n", val >> 31);
63 	dev_dbg(trident->card->dev, "Pan: 0x%x\n", (val >> 24) & 0x7f);
64 	dev_dbg(trident->card->dev, "Vol: 0x%x\n", (val >> 16) & 0xff);
65 	dev_dbg(trident->card->dev, "CTRL: 0x%x\n", (val >> 12) & 0x0f);
66 	dev_dbg(trident->card->dev, "EC: 0x%x\n", val & 0x0fff);
67 	if (trident->device != TRIDENT_DEVICE_ID_NX) {
68 		val = inl(TRID_REG(trident, CH_DX_CSO_ALPHA_FMS));
69 		dev_dbg(trident->card->dev, "CSO: 0x%x\n", val >> 16);
70 		dev_dbg(trident->card->dev, "Alpha: 0x%x\n", (val >> 4) & 0x0fff);
71 		dev_dbg(trident->card->dev, "FMS: 0x%x\n", val & 0x0f);
72 		val = inl(TRID_REG(trident, CH_DX_ESO_DELTA));
73 		dev_dbg(trident->card->dev, "ESO: 0x%x\n", val >> 16);
74 		dev_dbg(trident->card->dev, "Delta: 0x%x\n", val & 0xffff);
75 		val = inl(TRID_REG(trident, CH_DX_FMC_RVOL_CVOL));
76 	} else {		// TRIDENT_DEVICE_ID_NX
77 		val = inl(TRID_REG(trident, CH_NX_DELTA_CSO));
78 		tmp = (val >> 24) & 0xff;
79 		dev_dbg(trident->card->dev, "CSO: 0x%x\n", val & 0x00ffffff);
80 		val = inl(TRID_REG(trident, CH_NX_DELTA_ESO));
81 		tmp |= (val >> 16) & 0xff00;
82 		dev_dbg(trident->card->dev, "Delta: 0x%x\n", tmp);
83 		dev_dbg(trident->card->dev, "ESO: 0x%x\n", val & 0x00ffffff);
84 		val = inl(TRID_REG(trident, CH_NX_ALPHA_FMS_FMC_RVOL_CVOL));
85 		dev_dbg(trident->card->dev, "Alpha: 0x%x\n", val >> 20);
86 		dev_dbg(trident->card->dev, "FMS: 0x%x\n", (val >> 16) & 0x0f);
87 	}
88 	dev_dbg(trident->card->dev, "FMC: 0x%x\n", (val >> 14) & 3);
89 	dev_dbg(trident->card->dev, "RVol: 0x%x\n", (val >> 7) & 0x7f);
90 	dev_dbg(trident->card->dev, "CVol: 0x%x\n", val & 0x7f);
91 }
92 #endif
93 
94 /*---------------------------------------------------------------------------
95    unsigned short snd_trident_codec_read(struct snd_ac97 *ac97, unsigned short reg)
96 
97    Description: This routine will do all of the reading from the external
98                 CODEC (AC97).
99 
100    Parameters:  ac97 - ac97 codec structure
101                 reg - CODEC register index, from AC97 Hal.
102 
103    returns:     16 bit value read from the AC97.
104 
105   ---------------------------------------------------------------------------*/
106 static unsigned short snd_trident_codec_read(struct snd_ac97 *ac97, unsigned short reg)
107 {
108 	unsigned int data = 0, treg;
109 	unsigned short count = 0xffff;
110 	unsigned long flags;
111 	struct snd_trident *trident = ac97->private_data;
112 
113 	spin_lock_irqsave(&trident->reg_lock, flags);
114 	if (trident->device == TRIDENT_DEVICE_ID_DX) {
115 		data = (DX_AC97_BUSY_READ | (reg & 0x000000ff));
116 		outl(data, TRID_REG(trident, DX_ACR1_AC97_R));
117 		do {
118 			data = inl(TRID_REG(trident, DX_ACR1_AC97_R));
119 			if ((data & DX_AC97_BUSY_READ) == 0)
120 				break;
121 		} while (--count);
122 	} else if (trident->device == TRIDENT_DEVICE_ID_NX) {
123 		data = (NX_AC97_BUSY_READ | (reg & 0x000000ff));
124 		treg = ac97->num == 0 ? NX_ACR2_AC97_R_PRIMARY : NX_ACR3_AC97_R_SECONDARY;
125 		outl(data, TRID_REG(trident, treg));
126 		do {
127 			data = inl(TRID_REG(trident, treg));
128 			if ((data & 0x00000C00) == 0)
129 				break;
130 		} while (--count);
131 	} else if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
132 		data = SI_AC97_BUSY_READ | SI_AC97_AUDIO_BUSY | (reg & 0x000000ff);
133 		if (ac97->num == 1)
134 			data |= SI_AC97_SECONDARY;
135 		outl(data, TRID_REG(trident, SI_AC97_READ));
136 		do {
137 			data = inl(TRID_REG(trident, SI_AC97_READ));
138 			if ((data & (SI_AC97_BUSY_READ)) == 0)
139 				break;
140 		} while (--count);
141 	}
142 
143 	if (count == 0 && !trident->ac97_detect) {
144 		dev_err(trident->card->dev,
145 			"ac97 codec read TIMEOUT [0x%x/0x%x]!!!\n",
146 			   reg, data);
147 		data = 0;
148 	}
149 
150 	spin_unlock_irqrestore(&trident->reg_lock, flags);
151 	return ((unsigned short) (data >> 16));
152 }
153 
154 /*---------------------------------------------------------------------------
155    void snd_trident_codec_write(struct snd_ac97 *ac97, unsigned short reg,
156    unsigned short wdata)
157 
158    Description: This routine will do all of the writing to the external
159                 CODEC (AC97).
160 
161    Parameters:	ac97 - ac97 codec structure
162    	        reg - CODEC register index, from AC97 Hal.
163                 data  - Lower 16 bits are the data to write to CODEC.
164 
165    returns:     TRUE if everything went ok, else FALSE.
166 
167   ---------------------------------------------------------------------------*/
168 static void snd_trident_codec_write(struct snd_ac97 *ac97, unsigned short reg,
169 				    unsigned short wdata)
170 {
171 	unsigned int address, data;
172 	unsigned short count = 0xffff;
173 	unsigned long flags;
174 	struct snd_trident *trident = ac97->private_data;
175 
176 	data = ((unsigned long) wdata) << 16;
177 
178 	spin_lock_irqsave(&trident->reg_lock, flags);
179 	if (trident->device == TRIDENT_DEVICE_ID_DX) {
180 		address = DX_ACR0_AC97_W;
181 
182 		/* read AC-97 write register status */
183 		do {
184 			if ((inw(TRID_REG(trident, address)) & DX_AC97_BUSY_WRITE) == 0)
185 				break;
186 		} while (--count);
187 
188 		data |= (DX_AC97_BUSY_WRITE | (reg & 0x000000ff));
189 	} else if (trident->device == TRIDENT_DEVICE_ID_NX) {
190 		address = NX_ACR1_AC97_W;
191 
192 		/* read AC-97 write register status */
193 		do {
194 			if ((inw(TRID_REG(trident, address)) & NX_AC97_BUSY_WRITE) == 0)
195 				break;
196 		} while (--count);
197 
198 		data |= (NX_AC97_BUSY_WRITE | (ac97->num << 8) | (reg & 0x000000ff));
199 	} else if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
200 		address = SI_AC97_WRITE;
201 
202 		/* read AC-97 write register status */
203 		do {
204 			if ((inw(TRID_REG(trident, address)) & (SI_AC97_BUSY_WRITE)) == 0)
205 				break;
206 		} while (--count);
207 
208 		data |= SI_AC97_BUSY_WRITE | SI_AC97_AUDIO_BUSY | (reg & 0x000000ff);
209 		if (ac97->num == 1)
210 			data |= SI_AC97_SECONDARY;
211 	} else {
212 		address = 0;	/* keep GCC happy */
213 		count = 0;	/* return */
214 	}
215 
216 	if (count == 0) {
217 		spin_unlock_irqrestore(&trident->reg_lock, flags);
218 		return;
219 	}
220 	outl(data, TRID_REG(trident, address));
221 	spin_unlock_irqrestore(&trident->reg_lock, flags);
222 }
223 
224 /*---------------------------------------------------------------------------
225    void snd_trident_enable_eso(struct snd_trident *trident)
226 
227    Description: This routine will enable end of loop interrupts.
228                 End of loop interrupts will occur when a running
229                 channel reaches ESO.
230                 Also enables middle of loop interrupts.
231 
232    Parameters:  trident - pointer to target device class for 4DWave.
233 
234   ---------------------------------------------------------------------------*/
235 
236 static void snd_trident_enable_eso(struct snd_trident * trident)
237 {
238 	unsigned int val;
239 
240 	val = inl(TRID_REG(trident, T4D_LFO_GC_CIR));
241 	val |= ENDLP_IE;
242 	val |= MIDLP_IE;
243 	if (trident->device == TRIDENT_DEVICE_ID_SI7018)
244 		val |= BANK_B_EN;
245 	outl(val, TRID_REG(trident, T4D_LFO_GC_CIR));
246 }
247 
248 /*---------------------------------------------------------------------------
249    void snd_trident_disable_eso(struct snd_trident *trident)
250 
251    Description: This routine will disable end of loop interrupts.
252                 End of loop interrupts will occur when a running
253                 channel reaches ESO.
254                 Also disables middle of loop interrupts.
255 
256    Parameters:
257                 trident - pointer to target device class for 4DWave.
258 
259    returns:     TRUE if everything went ok, else FALSE.
260 
261   ---------------------------------------------------------------------------*/
262 
263 static void snd_trident_disable_eso(struct snd_trident * trident)
264 {
265 	unsigned int tmp;
266 
267 	tmp = inl(TRID_REG(trident, T4D_LFO_GC_CIR));
268 	tmp &= ~ENDLP_IE;
269 	tmp &= ~MIDLP_IE;
270 	outl(tmp, TRID_REG(trident, T4D_LFO_GC_CIR));
271 }
272 
273 /*---------------------------------------------------------------------------
274    void snd_trident_start_voice(struct snd_trident * trident, unsigned int voice)
275 
276     Description: Start a voice, any channel 0 thru 63.
277                  This routine automatically handles the fact that there are
278                  more than 32 channels available.
279 
280     Parameters : voice - Voice number 0 thru n.
281                  trident - pointer to target device class for 4DWave.
282 
283     Return Value: None.
284 
285   ---------------------------------------------------------------------------*/
286 
287 void snd_trident_start_voice(struct snd_trident * trident, unsigned int voice)
288 {
289 	unsigned int mask = 1 << (voice & 0x1f);
290 	unsigned int reg = (voice & 0x20) ? T4D_START_B : T4D_START_A;
291 
292 	outl(mask, TRID_REG(trident, reg));
293 }
294 
295 EXPORT_SYMBOL(snd_trident_start_voice);
296 
297 /*---------------------------------------------------------------------------
298    void snd_trident_stop_voice(struct snd_trident * trident, unsigned int voice)
299 
300     Description: Stop a voice, any channel 0 thru 63.
301                  This routine automatically handles the fact that there are
302                  more than 32 channels available.
303 
304     Parameters : voice - Voice number 0 thru n.
305                  trident - pointer to target device class for 4DWave.
306 
307     Return Value: None.
308 
309   ---------------------------------------------------------------------------*/
310 
311 void snd_trident_stop_voice(struct snd_trident * trident, unsigned int voice)
312 {
313 	unsigned int mask = 1 << (voice & 0x1f);
314 	unsigned int reg = (voice & 0x20) ? T4D_STOP_B : T4D_STOP_A;
315 
316 	outl(mask, TRID_REG(trident, reg));
317 }
318 
319 EXPORT_SYMBOL(snd_trident_stop_voice);
320 
321 /*---------------------------------------------------------------------------
322     int snd_trident_allocate_pcm_channel(struct snd_trident *trident)
323 
324     Description: Allocate hardware channel in Bank B (32-63).
325 
326     Parameters :  trident - pointer to target device class for 4DWave.
327 
328     Return Value: hardware channel - 32-63 or -1 when no channel is available
329 
330   ---------------------------------------------------------------------------*/
331 
332 static int snd_trident_allocate_pcm_channel(struct snd_trident * trident)
333 {
334 	int idx;
335 
336 	if (trident->ChanPCMcnt >= trident->ChanPCM)
337 		return -1;
338 	for (idx = 31; idx >= 0; idx--) {
339 		if (!(trident->ChanMap[T4D_BANK_B] & (1 << idx))) {
340 			trident->ChanMap[T4D_BANK_B] |= 1 << idx;
341 			trident->ChanPCMcnt++;
342 			return idx + 32;
343 		}
344 	}
345 	return -1;
346 }
347 
348 /*---------------------------------------------------------------------------
349     void snd_trident_free_pcm_channel(int channel)
350 
351     Description: Free hardware channel in Bank B (32-63)
352 
353     Parameters :  trident - pointer to target device class for 4DWave.
354 	          channel - hardware channel number 0-63
355 
356     Return Value: none
357 
358   ---------------------------------------------------------------------------*/
359 
360 static void snd_trident_free_pcm_channel(struct snd_trident *trident, int channel)
361 {
362 	if (channel < 32 || channel > 63)
363 		return;
364 	channel &= 0x1f;
365 	if (trident->ChanMap[T4D_BANK_B] & (1 << channel)) {
366 		trident->ChanMap[T4D_BANK_B] &= ~(1 << channel);
367 		trident->ChanPCMcnt--;
368 	}
369 }
370 
371 /*---------------------------------------------------------------------------
372     unsigned int snd_trident_allocate_synth_channel(void)
373 
374     Description: Allocate hardware channel in Bank A (0-31).
375 
376     Parameters :  trident - pointer to target device class for 4DWave.
377 
378     Return Value: hardware channel - 0-31 or -1 when no channel is available
379 
380   ---------------------------------------------------------------------------*/
381 
382 static int snd_trident_allocate_synth_channel(struct snd_trident * trident)
383 {
384 	int idx;
385 
386 	for (idx = 31; idx >= 0; idx--) {
387 		if (!(trident->ChanMap[T4D_BANK_A] & (1 << idx))) {
388 			trident->ChanMap[T4D_BANK_A] |= 1 << idx;
389 			trident->synth.ChanSynthCount++;
390 			return idx;
391 		}
392 	}
393 	return -1;
394 }
395 
396 /*---------------------------------------------------------------------------
397     void snd_trident_free_synth_channel( int channel )
398 
399     Description: Free hardware channel in Bank B (0-31).
400 
401     Parameters :  trident - pointer to target device class for 4DWave.
402 	          channel - hardware channel number 0-63
403 
404     Return Value: none
405 
406   ---------------------------------------------------------------------------*/
407 
408 static void snd_trident_free_synth_channel(struct snd_trident *trident, int channel)
409 {
410 	if (channel < 0 || channel > 31)
411 		return;
412 	channel &= 0x1f;
413 	if (trident->ChanMap[T4D_BANK_A] & (1 << channel)) {
414 		trident->ChanMap[T4D_BANK_A] &= ~(1 << channel);
415 		trident->synth.ChanSynthCount--;
416 	}
417 }
418 
419 /*---------------------------------------------------------------------------
420    snd_trident_write_voice_regs
421 
422    Description: This routine will complete and write the 5 hardware channel
423                 registers to hardware.
424 
425    Parameters:  trident - pointer to target device class for 4DWave.
426                 voice - synthesizer voice structure
427                 Each register field.
428 
429   ---------------------------------------------------------------------------*/
430 
431 void snd_trident_write_voice_regs(struct snd_trident * trident,
432 				  struct snd_trident_voice * voice)
433 {
434 	unsigned int FmcRvolCvol;
435 	unsigned int regs[5];
436 
437 	regs[1] = voice->LBA;
438 	regs[4] = (voice->GVSel << 31) |
439 		  ((voice->Pan & 0x0000007f) << 24) |
440 		  ((voice->CTRL & 0x0000000f) << 12);
441 	FmcRvolCvol = ((voice->FMC & 3) << 14) |
442 	              ((voice->RVol & 0x7f) << 7) |
443 	              (voice->CVol & 0x7f);
444 
445 	switch (trident->device) {
446 	case TRIDENT_DEVICE_ID_SI7018:
447 		regs[4] |= voice->number > 31 ?
448 				(voice->Vol & 0x000003ff) :
449 				((voice->Vol & 0x00003fc) << (16-2)) |
450 				(voice->EC & 0x00000fff);
451 		regs[0] = (voice->CSO << 16) | ((voice->Alpha & 0x00000fff) << 4) |
452 			(voice->FMS & 0x0000000f);
453 		regs[2] = (voice->ESO << 16) | (voice->Delta & 0x0ffff);
454 		regs[3] = (voice->Attribute << 16) | FmcRvolCvol;
455 		break;
456 	case TRIDENT_DEVICE_ID_DX:
457 		regs[4] |= ((voice->Vol & 0x000003fc) << (16-2)) |
458 			   (voice->EC & 0x00000fff);
459 		regs[0] = (voice->CSO << 16) | ((voice->Alpha & 0x00000fff) << 4) |
460 			(voice->FMS & 0x0000000f);
461 		regs[2] = (voice->ESO << 16) | (voice->Delta & 0x0ffff);
462 		regs[3] = FmcRvolCvol;
463 		break;
464 	case TRIDENT_DEVICE_ID_NX:
465 		regs[4] |= ((voice->Vol & 0x000003fc) << (16-2)) |
466 			   (voice->EC & 0x00000fff);
467 		regs[0] = (voice->Delta << 24) | (voice->CSO & 0x00ffffff);
468 		regs[2] = ((voice->Delta << 16) & 0xff000000) |
469 			(voice->ESO & 0x00ffffff);
470 		regs[3] = (voice->Alpha << 20) |
471 			((voice->FMS & 0x0000000f) << 16) | FmcRvolCvol;
472 		break;
473 	default:
474 		snd_BUG();
475 		return;
476 	}
477 
478 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
479 	outl(regs[0], TRID_REG(trident, CH_START + 0));
480 	outl(regs[1], TRID_REG(trident, CH_START + 4));
481 	outl(regs[2], TRID_REG(trident, CH_START + 8));
482 	outl(regs[3], TRID_REG(trident, CH_START + 12));
483 	outl(regs[4], TRID_REG(trident, CH_START + 16));
484 
485 #if 0
486 	dev_dbg(trident->card->dev, "written %i channel:\n", voice->number);
487 	dev_dbg(trident->card->dev, "  regs[0] = 0x%x/0x%x\n",
488 	       regs[0], inl(TRID_REG(trident, CH_START + 0)));
489 	dev_dbg(trident->card->dev, "  regs[1] = 0x%x/0x%x\n",
490 	       regs[1], inl(TRID_REG(trident, CH_START + 4)));
491 	dev_dbg(trident->card->dev, "  regs[2] = 0x%x/0x%x\n",
492 	       regs[2], inl(TRID_REG(trident, CH_START + 8)));
493 	dev_dbg(trident->card->dev, "  regs[3] = 0x%x/0x%x\n",
494 	       regs[3], inl(TRID_REG(trident, CH_START + 12)));
495 	dev_dbg(trident->card->dev, "  regs[4] = 0x%x/0x%x\n",
496 	       regs[4], inl(TRID_REG(trident, CH_START + 16)));
497 #endif
498 }
499 
500 EXPORT_SYMBOL(snd_trident_write_voice_regs);
501 
502 /*---------------------------------------------------------------------------
503    snd_trident_write_cso_reg
504 
505    Description: This routine will write the new CSO offset
506                 register to hardware.
507 
508    Parameters:  trident - pointer to target device class for 4DWave.
509                 voice - synthesizer voice structure
510                 CSO - new CSO value
511 
512   ---------------------------------------------------------------------------*/
513 
514 static void snd_trident_write_cso_reg(struct snd_trident * trident,
515 				      struct snd_trident_voice * voice,
516 				      unsigned int CSO)
517 {
518 	voice->CSO = CSO;
519 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
520 	if (trident->device != TRIDENT_DEVICE_ID_NX) {
521 		outw(voice->CSO, TRID_REG(trident, CH_DX_CSO_ALPHA_FMS) + 2);
522 	} else {
523 		outl((voice->Delta << 24) |
524 		     (voice->CSO & 0x00ffffff), TRID_REG(trident, CH_NX_DELTA_CSO));
525 	}
526 }
527 
528 /*---------------------------------------------------------------------------
529    snd_trident_write_eso_reg
530 
531    Description: This routine will write the new ESO offset
532                 register to hardware.
533 
534    Parameters:  trident - pointer to target device class for 4DWave.
535                 voice - synthesizer voice structure
536                 ESO - new ESO value
537 
538   ---------------------------------------------------------------------------*/
539 
540 static void snd_trident_write_eso_reg(struct snd_trident * trident,
541 				      struct snd_trident_voice * voice,
542 				      unsigned int ESO)
543 {
544 	voice->ESO = ESO;
545 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
546 	if (trident->device != TRIDENT_DEVICE_ID_NX) {
547 		outw(voice->ESO, TRID_REG(trident, CH_DX_ESO_DELTA) + 2);
548 	} else {
549 		outl(((voice->Delta << 16) & 0xff000000) | (voice->ESO & 0x00ffffff),
550 		     TRID_REG(trident, CH_NX_DELTA_ESO));
551 	}
552 }
553 
554 /*---------------------------------------------------------------------------
555    snd_trident_write_vol_reg
556 
557    Description: This routine will write the new voice volume
558                 register to hardware.
559 
560    Parameters:  trident - pointer to target device class for 4DWave.
561                 voice - synthesizer voice structure
562                 Vol - new voice volume
563 
564   ---------------------------------------------------------------------------*/
565 
566 static void snd_trident_write_vol_reg(struct snd_trident * trident,
567 				      struct snd_trident_voice * voice,
568 				      unsigned int Vol)
569 {
570 	voice->Vol = Vol;
571 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
572 	switch (trident->device) {
573 	case TRIDENT_DEVICE_ID_DX:
574 	case TRIDENT_DEVICE_ID_NX:
575 		outb(voice->Vol >> 2, TRID_REG(trident, CH_GVSEL_PAN_VOL_CTRL_EC + 2));
576 		break;
577 	case TRIDENT_DEVICE_ID_SI7018:
578 		/* dev_dbg(trident->card->dev, "voice->Vol = 0x%x\n", voice->Vol); */
579 		outw((voice->CTRL << 12) | voice->Vol,
580 		     TRID_REG(trident, CH_GVSEL_PAN_VOL_CTRL_EC));
581 		break;
582 	}
583 }
584 
585 /*---------------------------------------------------------------------------
586    snd_trident_write_pan_reg
587 
588    Description: This routine will write the new voice pan
589                 register to hardware.
590 
591    Parameters:  trident - pointer to target device class for 4DWave.
592                 voice - synthesizer voice structure
593                 Pan - new pan value
594 
595   ---------------------------------------------------------------------------*/
596 
597 static void snd_trident_write_pan_reg(struct snd_trident * trident,
598 				      struct snd_trident_voice * voice,
599 				      unsigned int Pan)
600 {
601 	voice->Pan = Pan;
602 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
603 	outb(((voice->GVSel & 0x01) << 7) | (voice->Pan & 0x7f),
604 	     TRID_REG(trident, CH_GVSEL_PAN_VOL_CTRL_EC + 3));
605 }
606 
607 /*---------------------------------------------------------------------------
608    snd_trident_write_rvol_reg
609 
610    Description: This routine will write the new reverb volume
611                 register to hardware.
612 
613    Parameters:  trident - pointer to target device class for 4DWave.
614                 voice - synthesizer voice structure
615                 RVol - new reverb volume
616 
617   ---------------------------------------------------------------------------*/
618 
619 static void snd_trident_write_rvol_reg(struct snd_trident * trident,
620 				       struct snd_trident_voice * voice,
621 				       unsigned int RVol)
622 {
623 	voice->RVol = RVol;
624 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
625 	outw(((voice->FMC & 0x0003) << 14) | ((voice->RVol & 0x007f) << 7) |
626 	     (voice->CVol & 0x007f),
627 	     TRID_REG(trident, trident->device == TRIDENT_DEVICE_ID_NX ?
628 		      CH_NX_ALPHA_FMS_FMC_RVOL_CVOL : CH_DX_FMC_RVOL_CVOL));
629 }
630 
631 /*---------------------------------------------------------------------------
632    snd_trident_write_cvol_reg
633 
634    Description: This routine will write the new chorus volume
635                 register to hardware.
636 
637    Parameters:  trident - pointer to target device class for 4DWave.
638                 voice - synthesizer voice structure
639                 CVol - new chorus volume
640 
641   ---------------------------------------------------------------------------*/
642 
643 static void snd_trident_write_cvol_reg(struct snd_trident * trident,
644 				       struct snd_trident_voice * voice,
645 				       unsigned int CVol)
646 {
647 	voice->CVol = CVol;
648 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
649 	outw(((voice->FMC & 0x0003) << 14) | ((voice->RVol & 0x007f) << 7) |
650 	     (voice->CVol & 0x007f),
651 	     TRID_REG(trident, trident->device == TRIDENT_DEVICE_ID_NX ?
652 		      CH_NX_ALPHA_FMS_FMC_RVOL_CVOL : CH_DX_FMC_RVOL_CVOL));
653 }
654 
655 /*---------------------------------------------------------------------------
656    snd_trident_convert_rate
657 
658    Description: This routine converts rate in HZ to hardware delta value.
659 
660    Parameters:  trident - pointer to target device class for 4DWave.
661                 rate - Real or Virtual channel number.
662 
663    Returns:     Delta value.
664 
665   ---------------------------------------------------------------------------*/
666 static unsigned int snd_trident_convert_rate(unsigned int rate)
667 {
668 	unsigned int delta;
669 
670 	// We special case 44100 and 8000 since rounding with the equation
671 	// does not give us an accurate enough value. For 11025 and 22050
672 	// the equation gives us the best answer. All other frequencies will
673 	// also use the equation. JDW
674 	if (rate == 44100)
675 		delta = 0xeb3;
676 	else if (rate == 8000)
677 		delta = 0x2ab;
678 	else if (rate == 48000)
679 		delta = 0x1000;
680 	else
681 		delta = (((rate << 12) + 24000) / 48000) & 0x0000ffff;
682 	return delta;
683 }
684 
685 /*---------------------------------------------------------------------------
686    snd_trident_convert_adc_rate
687 
688    Description: This routine converts rate in HZ to hardware delta value.
689 
690    Parameters:  trident - pointer to target device class for 4DWave.
691                 rate - Real or Virtual channel number.
692 
693    Returns:     Delta value.
694 
695   ---------------------------------------------------------------------------*/
696 static unsigned int snd_trident_convert_adc_rate(unsigned int rate)
697 {
698 	unsigned int delta;
699 
700 	// We special case 44100 and 8000 since rounding with the equation
701 	// does not give us an accurate enough value. For 11025 and 22050
702 	// the equation gives us the best answer. All other frequencies will
703 	// also use the equation. JDW
704 	if (rate == 44100)
705 		delta = 0x116a;
706 	else if (rate == 8000)
707 		delta = 0x6000;
708 	else if (rate == 48000)
709 		delta = 0x1000;
710 	else
711 		delta = ((48000 << 12) / rate) & 0x0000ffff;
712 	return delta;
713 }
714 
715 /*---------------------------------------------------------------------------
716    snd_trident_spurious_threshold
717 
718    Description: This routine converts rate in HZ to spurious threshold.
719 
720    Parameters:  trident - pointer to target device class for 4DWave.
721                 rate - Real or Virtual channel number.
722 
723    Returns:     Delta value.
724 
725   ---------------------------------------------------------------------------*/
726 static unsigned int snd_trident_spurious_threshold(unsigned int rate,
727 						   unsigned int period_size)
728 {
729 	unsigned int res = (rate * period_size) / 48000;
730 	if (res < 64)
731 		res = res / 2;
732 	else
733 		res -= 32;
734 	return res;
735 }
736 
737 /*---------------------------------------------------------------------------
738    snd_trident_control_mode
739 
740    Description: This routine returns a control mode for a PCM channel.
741 
742    Parameters:  trident - pointer to target device class for 4DWave.
743                 substream  - PCM substream
744 
745    Returns:     Control value.
746 
747   ---------------------------------------------------------------------------*/
748 static unsigned int snd_trident_control_mode(struct snd_pcm_substream *substream)
749 {
750 	unsigned int CTRL;
751 	struct snd_pcm_runtime *runtime = substream->runtime;
752 
753 	/* set ctrl mode
754 	   CTRL default: 8-bit (unsigned) mono, loop mode enabled
755 	 */
756 	CTRL = 0x00000001;
757 	if (snd_pcm_format_width(runtime->format) == 16)
758 		CTRL |= 0x00000008;	// 16-bit data
759 	if (snd_pcm_format_signed(runtime->format))
760 		CTRL |= 0x00000002;	// signed data
761 	if (runtime->channels > 1)
762 		CTRL |= 0x00000004;	// stereo data
763 	return CTRL;
764 }
765 
766 /*
767  *  PCM part
768  */
769 
770 /*---------------------------------------------------------------------------
771    snd_trident_ioctl
772 
773    Description: Device I/O control handler for playback/capture parameters.
774 
775    Parameters:   substream  - PCM substream class
776                 cmd     - what ioctl message to process
777                 arg     - additional message infoarg
778 
779    Returns:     Error status
780 
781   ---------------------------------------------------------------------------*/
782 
783 static int snd_trident_ioctl(struct snd_pcm_substream *substream,
784 			     unsigned int cmd,
785 			     void *arg)
786 {
787 	/* FIXME: it seems that with small periods the behaviour of
788 	          trident hardware is unpredictable and interrupt generator
789 	          is broken */
790 	return snd_pcm_lib_ioctl(substream, cmd, arg);
791 }
792 
793 /*---------------------------------------------------------------------------
794    snd_trident_allocate_pcm_mem
795 
796    Description: Allocate PCM ring buffer for given substream
797 
798    Parameters:  substream  - PCM substream class
799 		hw_params  - hardware parameters
800 
801    Returns:     Error status
802 
803   ---------------------------------------------------------------------------*/
804 
805 static int snd_trident_allocate_pcm_mem(struct snd_pcm_substream *substream,
806 					struct snd_pcm_hw_params *hw_params)
807 {
808 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
809 	struct snd_pcm_runtime *runtime = substream->runtime;
810 	struct snd_trident_voice *voice = runtime->private_data;
811 	int err;
812 
813 	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
814 		return err;
815 	if (trident->tlb.entries) {
816 		if (err > 0) { /* change */
817 			if (voice->memblk)
818 				snd_trident_free_pages(trident, voice->memblk);
819 			voice->memblk = snd_trident_alloc_pages(trident, substream);
820 			if (voice->memblk == NULL)
821 				return -ENOMEM;
822 		}
823 	}
824 	return 0;
825 }
826 
827 /*---------------------------------------------------------------------------
828    snd_trident_allocate_evoice
829 
830    Description: Allocate extra voice as interrupt generator
831 
832    Parameters:  substream  - PCM substream class
833 		hw_params  - hardware parameters
834 
835    Returns:     Error status
836 
837   ---------------------------------------------------------------------------*/
838 
839 static int snd_trident_allocate_evoice(struct snd_pcm_substream *substream,
840 				       struct snd_pcm_hw_params *hw_params)
841 {
842 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
843 	struct snd_pcm_runtime *runtime = substream->runtime;
844 	struct snd_trident_voice *voice = runtime->private_data;
845 	struct snd_trident_voice *evoice = voice->extra;
846 
847 	/* voice management */
848 
849 	if (params_buffer_size(hw_params) / 2 != params_period_size(hw_params)) {
850 		if (evoice == NULL) {
851 			evoice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
852 			if (evoice == NULL)
853 				return -ENOMEM;
854 			voice->extra = evoice;
855 			evoice->substream = substream;
856 		}
857 	} else {
858 		if (evoice != NULL) {
859 			snd_trident_free_voice(trident, evoice);
860 			voice->extra = evoice = NULL;
861 		}
862 	}
863 
864 	return 0;
865 }
866 
867 /*---------------------------------------------------------------------------
868    snd_trident_hw_params
869 
870    Description: Set the hardware parameters for the playback device.
871 
872    Parameters:  substream  - PCM substream class
873 		hw_params  - hardware parameters
874 
875    Returns:     Error status
876 
877   ---------------------------------------------------------------------------*/
878 
879 static int snd_trident_hw_params(struct snd_pcm_substream *substream,
880 				 struct snd_pcm_hw_params *hw_params)
881 {
882 	int err;
883 
884 	err = snd_trident_allocate_pcm_mem(substream, hw_params);
885 	if (err >= 0)
886 		err = snd_trident_allocate_evoice(substream, hw_params);
887 	return err;
888 }
889 
890 /*---------------------------------------------------------------------------
891    snd_trident_playback_hw_free
892 
893    Description: Release the hardware resources for the playback device.
894 
895    Parameters:  substream  - PCM substream class
896 
897    Returns:     Error status
898 
899   ---------------------------------------------------------------------------*/
900 
901 static int snd_trident_hw_free(struct snd_pcm_substream *substream)
902 {
903 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
904 	struct snd_pcm_runtime *runtime = substream->runtime;
905 	struct snd_trident_voice *voice = runtime->private_data;
906 	struct snd_trident_voice *evoice = voice ? voice->extra : NULL;
907 
908 	if (trident->tlb.entries) {
909 		if (voice && voice->memblk) {
910 			snd_trident_free_pages(trident, voice->memblk);
911 			voice->memblk = NULL;
912 		}
913 	}
914 	snd_pcm_lib_free_pages(substream);
915 	if (evoice != NULL) {
916 		snd_trident_free_voice(trident, evoice);
917 		voice->extra = NULL;
918 	}
919 	return 0;
920 }
921 
922 /*---------------------------------------------------------------------------
923    snd_trident_playback_prepare
924 
925    Description: Prepare playback device for playback.
926 
927    Parameters:  substream  - PCM substream class
928 
929    Returns:     Error status
930 
931   ---------------------------------------------------------------------------*/
932 
933 static int snd_trident_playback_prepare(struct snd_pcm_substream *substream)
934 {
935 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
936 	struct snd_pcm_runtime *runtime = substream->runtime;
937 	struct snd_trident_voice *voice = runtime->private_data;
938 	struct snd_trident_voice *evoice = voice->extra;
939 	struct snd_trident_pcm_mixer *mix = &trident->pcm_mixer[substream->number];
940 
941 	spin_lock_irq(&trident->reg_lock);
942 
943 	/* set delta (rate) value */
944 	voice->Delta = snd_trident_convert_rate(runtime->rate);
945 	voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
946 
947 	/* set Loop Begin Address */
948 	if (voice->memblk)
949 		voice->LBA = voice->memblk->offset;
950 	else
951 		voice->LBA = runtime->dma_addr;
952 
953 	voice->CSO = 0;
954 	voice->ESO = runtime->buffer_size - 1;	/* in samples */
955 	voice->CTRL = snd_trident_control_mode(substream);
956 	voice->FMC = 3;
957 	voice->GVSel = 1;
958 	voice->EC = 0;
959 	voice->Alpha = 0;
960 	voice->FMS = 0;
961 	voice->Vol = mix->vol;
962 	voice->RVol = mix->rvol;
963 	voice->CVol = mix->cvol;
964 	voice->Pan = mix->pan;
965 	voice->Attribute = 0;
966 #if 0
967 	voice->Attribute = (1<<(30-16))|(2<<(26-16))|
968 			   (0<<(24-16))|(0x1f<<(19-16));
969 #else
970 	voice->Attribute = 0;
971 #endif
972 
973 	snd_trident_write_voice_regs(trident, voice);
974 
975 	if (evoice != NULL) {
976 		evoice->Delta = voice->Delta;
977 		evoice->spurious_threshold = voice->spurious_threshold;
978 		evoice->LBA = voice->LBA;
979 		evoice->CSO = 0;
980 		evoice->ESO = (runtime->period_size * 2) + 4 - 1; /* in samples */
981 		evoice->CTRL = voice->CTRL;
982 		evoice->FMC = 3;
983 		evoice->GVSel = trident->device == TRIDENT_DEVICE_ID_SI7018 ? 0 : 1;
984 		evoice->EC = 0;
985 		evoice->Alpha = 0;
986 		evoice->FMS = 0;
987 		evoice->Vol = 0x3ff;			/* mute */
988 		evoice->RVol = evoice->CVol = 0x7f;	/* mute */
989 		evoice->Pan = 0x7f;			/* mute */
990 #if 0
991 		evoice->Attribute = (1<<(30-16))|(2<<(26-16))|
992 				    (0<<(24-16))|(0x1f<<(19-16));
993 #else
994 		evoice->Attribute = 0;
995 #endif
996 		snd_trident_write_voice_regs(trident, evoice);
997 		evoice->isync2 = 1;
998 		evoice->isync_mark = runtime->period_size;
999 		evoice->ESO = (runtime->period_size * 2) - 1;
1000 	}
1001 
1002 	spin_unlock_irq(&trident->reg_lock);
1003 
1004 	return 0;
1005 }
1006 
1007 /*---------------------------------------------------------------------------
1008    snd_trident_capture_hw_params
1009 
1010    Description: Set the hardware parameters for the capture device.
1011 
1012    Parameters:  substream  - PCM substream class
1013 		hw_params  - hardware parameters
1014 
1015    Returns:     Error status
1016 
1017   ---------------------------------------------------------------------------*/
1018 
1019 static int snd_trident_capture_hw_params(struct snd_pcm_substream *substream,
1020 					 struct snd_pcm_hw_params *hw_params)
1021 {
1022 	return snd_trident_allocate_pcm_mem(substream, hw_params);
1023 }
1024 
1025 /*---------------------------------------------------------------------------
1026    snd_trident_capture_prepare
1027 
1028    Description: Prepare capture device for playback.
1029 
1030    Parameters:  substream  - PCM substream class
1031 
1032    Returns:     Error status
1033 
1034   ---------------------------------------------------------------------------*/
1035 
1036 static int snd_trident_capture_prepare(struct snd_pcm_substream *substream)
1037 {
1038 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1039 	struct snd_pcm_runtime *runtime = substream->runtime;
1040 	struct snd_trident_voice *voice = runtime->private_data;
1041 	unsigned int val, ESO_bytes;
1042 
1043 	spin_lock_irq(&trident->reg_lock);
1044 
1045 	// Initialize the channel and set channel Mode
1046 	outb(0, TRID_REG(trident, LEGACY_DMAR15));
1047 
1048 	// Set DMA channel operation mode register
1049 	outb(0x54, TRID_REG(trident, LEGACY_DMAR11));
1050 
1051 	// Set channel buffer Address, DMAR0 expects contiguous PCI memory area
1052 	voice->LBA = runtime->dma_addr;
1053 	outl(voice->LBA, TRID_REG(trident, LEGACY_DMAR0));
1054 	if (voice->memblk)
1055 		voice->LBA = voice->memblk->offset;
1056 
1057 	// set ESO
1058 	ESO_bytes = snd_pcm_lib_buffer_bytes(substream) - 1;
1059 	outb((ESO_bytes & 0x00ff0000) >> 16, TRID_REG(trident, LEGACY_DMAR6));
1060 	outw((ESO_bytes & 0x0000ffff), TRID_REG(trident, LEGACY_DMAR4));
1061 	ESO_bytes++;
1062 
1063 	// Set channel sample rate, 4.12 format
1064 	val = (((unsigned int) 48000L << 12) + (runtime->rate/2)) / runtime->rate;
1065 	outw(val, TRID_REG(trident, T4D_SBDELTA_DELTA_R));
1066 
1067 	// Set channel interrupt blk length
1068 	if (snd_pcm_format_width(runtime->format) == 16) {
1069 		val = (unsigned short) ((ESO_bytes >> 1) - 1);
1070 	} else {
1071 		val = (unsigned short) (ESO_bytes - 1);
1072 	}
1073 
1074 	outl((val << 16) | val, TRID_REG(trident, T4D_SBBL_SBCL));
1075 
1076 	// Right now, set format and start to run captureing,
1077 	// continuous run loop enable.
1078 	trident->bDMAStart = 0x19;	// 0001 1001b
1079 
1080 	if (snd_pcm_format_width(runtime->format) == 16)
1081 		trident->bDMAStart |= 0x80;
1082 	if (snd_pcm_format_signed(runtime->format))
1083 		trident->bDMAStart |= 0x20;
1084 	if (runtime->channels > 1)
1085 		trident->bDMAStart |= 0x40;
1086 
1087 	// Prepare capture intr channel
1088 
1089 	voice->Delta = snd_trident_convert_rate(runtime->rate);
1090 	voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
1091 	voice->isync = 1;
1092 	voice->isync_mark = runtime->period_size;
1093 	voice->isync_max = runtime->buffer_size;
1094 
1095 	// Set voice parameters
1096 	voice->CSO = 0;
1097 	voice->ESO = voice->isync_ESO = (runtime->period_size * 2) + 6 - 1;
1098 	voice->CTRL = snd_trident_control_mode(substream);
1099 	voice->FMC = 3;
1100 	voice->RVol = 0x7f;
1101 	voice->CVol = 0x7f;
1102 	voice->GVSel = 1;
1103 	voice->Pan = 0x7f;		/* mute */
1104 	voice->Vol = 0x3ff;		/* mute */
1105 	voice->EC = 0;
1106 	voice->Alpha = 0;
1107 	voice->FMS = 0;
1108 	voice->Attribute = 0;
1109 
1110 	snd_trident_write_voice_regs(trident, voice);
1111 
1112 	spin_unlock_irq(&trident->reg_lock);
1113 	return 0;
1114 }
1115 
1116 /*---------------------------------------------------------------------------
1117    snd_trident_si7018_capture_hw_params
1118 
1119    Description: Set the hardware parameters for the capture device.
1120 
1121    Parameters:  substream  - PCM substream class
1122 		hw_params  - hardware parameters
1123 
1124    Returns:     Error status
1125 
1126   ---------------------------------------------------------------------------*/
1127 
1128 static int snd_trident_si7018_capture_hw_params(struct snd_pcm_substream *substream,
1129 						struct snd_pcm_hw_params *hw_params)
1130 {
1131 	int err;
1132 
1133 	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
1134 		return err;
1135 
1136 	return snd_trident_allocate_evoice(substream, hw_params);
1137 }
1138 
1139 /*---------------------------------------------------------------------------
1140    snd_trident_si7018_capture_hw_free
1141 
1142    Description: Release the hardware resources for the capture device.
1143 
1144    Parameters:  substream  - PCM substream class
1145 
1146    Returns:     Error status
1147 
1148   ---------------------------------------------------------------------------*/
1149 
1150 static int snd_trident_si7018_capture_hw_free(struct snd_pcm_substream *substream)
1151 {
1152 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1153 	struct snd_pcm_runtime *runtime = substream->runtime;
1154 	struct snd_trident_voice *voice = runtime->private_data;
1155 	struct snd_trident_voice *evoice = voice ? voice->extra : NULL;
1156 
1157 	snd_pcm_lib_free_pages(substream);
1158 	if (evoice != NULL) {
1159 		snd_trident_free_voice(trident, evoice);
1160 		voice->extra = NULL;
1161 	}
1162 	return 0;
1163 }
1164 
1165 /*---------------------------------------------------------------------------
1166    snd_trident_si7018_capture_prepare
1167 
1168    Description: Prepare capture device for playback.
1169 
1170    Parameters:  substream  - PCM substream class
1171 
1172    Returns:     Error status
1173 
1174   ---------------------------------------------------------------------------*/
1175 
1176 static int snd_trident_si7018_capture_prepare(struct snd_pcm_substream *substream)
1177 {
1178 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1179 	struct snd_pcm_runtime *runtime = substream->runtime;
1180 	struct snd_trident_voice *voice = runtime->private_data;
1181 	struct snd_trident_voice *evoice = voice->extra;
1182 
1183 	spin_lock_irq(&trident->reg_lock);
1184 
1185 	voice->LBA = runtime->dma_addr;
1186 	voice->Delta = snd_trident_convert_adc_rate(runtime->rate);
1187 	voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
1188 
1189 	// Set voice parameters
1190 	voice->CSO = 0;
1191 	voice->ESO = runtime->buffer_size - 1;		/* in samples */
1192 	voice->CTRL = snd_trident_control_mode(substream);
1193 	voice->FMC = 0;
1194 	voice->RVol = 0;
1195 	voice->CVol = 0;
1196 	voice->GVSel = 1;
1197 	voice->Pan = T4D_DEFAULT_PCM_PAN;
1198 	voice->Vol = 0;
1199 	voice->EC = 0;
1200 	voice->Alpha = 0;
1201 	voice->FMS = 0;
1202 
1203 	voice->Attribute = (2 << (30-16)) |
1204 			   (2 << (26-16)) |
1205 			   (2 << (24-16)) |
1206 			   (1 << (23-16));
1207 
1208 	snd_trident_write_voice_regs(trident, voice);
1209 
1210 	if (evoice != NULL) {
1211 		evoice->Delta = snd_trident_convert_rate(runtime->rate);
1212 		evoice->spurious_threshold = voice->spurious_threshold;
1213 		evoice->LBA = voice->LBA;
1214 		evoice->CSO = 0;
1215 		evoice->ESO = (runtime->period_size * 2) + 20 - 1; /* in samples, 20 means correction */
1216 		evoice->CTRL = voice->CTRL;
1217 		evoice->FMC = 3;
1218 		evoice->GVSel = 0;
1219 		evoice->EC = 0;
1220 		evoice->Alpha = 0;
1221 		evoice->FMS = 0;
1222 		evoice->Vol = 0x3ff;			/* mute */
1223 		evoice->RVol = evoice->CVol = 0x7f;	/* mute */
1224 		evoice->Pan = 0x7f;			/* mute */
1225 		evoice->Attribute = 0;
1226 		snd_trident_write_voice_regs(trident, evoice);
1227 		evoice->isync2 = 1;
1228 		evoice->isync_mark = runtime->period_size;
1229 		evoice->ESO = (runtime->period_size * 2) - 1;
1230 	}
1231 
1232 	spin_unlock_irq(&trident->reg_lock);
1233 	return 0;
1234 }
1235 
1236 /*---------------------------------------------------------------------------
1237    snd_trident_foldback_prepare
1238 
1239    Description: Prepare foldback capture device for playback.
1240 
1241    Parameters:  substream  - PCM substream class
1242 
1243    Returns:     Error status
1244 
1245   ---------------------------------------------------------------------------*/
1246 
1247 static int snd_trident_foldback_prepare(struct snd_pcm_substream *substream)
1248 {
1249 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1250 	struct snd_pcm_runtime *runtime = substream->runtime;
1251 	struct snd_trident_voice *voice = runtime->private_data;
1252 	struct snd_trident_voice *evoice = voice->extra;
1253 
1254 	spin_lock_irq(&trident->reg_lock);
1255 
1256 	/* Set channel buffer Address */
1257 	if (voice->memblk)
1258 		voice->LBA = voice->memblk->offset;
1259 	else
1260 		voice->LBA = runtime->dma_addr;
1261 
1262 	/* set target ESO for channel */
1263 	voice->ESO = runtime->buffer_size - 1;	/* in samples */
1264 
1265 	/* set sample rate */
1266 	voice->Delta = 0x1000;
1267 	voice->spurious_threshold = snd_trident_spurious_threshold(48000, runtime->period_size);
1268 
1269 	voice->CSO = 0;
1270 	voice->CTRL = snd_trident_control_mode(substream);
1271 	voice->FMC = 3;
1272 	voice->RVol = 0x7f;
1273 	voice->CVol = 0x7f;
1274 	voice->GVSel = 1;
1275 	voice->Pan = 0x7f;	/* mute */
1276 	voice->Vol = 0x3ff;	/* mute */
1277 	voice->EC = 0;
1278 	voice->Alpha = 0;
1279 	voice->FMS = 0;
1280 	voice->Attribute = 0;
1281 
1282 	/* set up capture channel */
1283 	outb(((voice->number & 0x3f) | 0x80), TRID_REG(trident, T4D_RCI + voice->foldback_chan));
1284 
1285 	snd_trident_write_voice_regs(trident, voice);
1286 
1287 	if (evoice != NULL) {
1288 		evoice->Delta = voice->Delta;
1289 		evoice->spurious_threshold = voice->spurious_threshold;
1290 		evoice->LBA = voice->LBA;
1291 		evoice->CSO = 0;
1292 		evoice->ESO = (runtime->period_size * 2) + 4 - 1; /* in samples */
1293 		evoice->CTRL = voice->CTRL;
1294 		evoice->FMC = 3;
1295 		evoice->GVSel = trident->device == TRIDENT_DEVICE_ID_SI7018 ? 0 : 1;
1296 		evoice->EC = 0;
1297 		evoice->Alpha = 0;
1298 		evoice->FMS = 0;
1299 		evoice->Vol = 0x3ff;			/* mute */
1300 		evoice->RVol = evoice->CVol = 0x7f;	/* mute */
1301 		evoice->Pan = 0x7f;			/* mute */
1302 		evoice->Attribute = 0;
1303 		snd_trident_write_voice_regs(trident, evoice);
1304 		evoice->isync2 = 1;
1305 		evoice->isync_mark = runtime->period_size;
1306 		evoice->ESO = (runtime->period_size * 2) - 1;
1307 	}
1308 
1309 	spin_unlock_irq(&trident->reg_lock);
1310 	return 0;
1311 }
1312 
1313 /*---------------------------------------------------------------------------
1314    snd_trident_spdif_hw_params
1315 
1316    Description: Set the hardware parameters for the spdif device.
1317 
1318    Parameters:  substream  - PCM substream class
1319 		hw_params  - hardware parameters
1320 
1321    Returns:     Error status
1322 
1323   ---------------------------------------------------------------------------*/
1324 
1325 static int snd_trident_spdif_hw_params(struct snd_pcm_substream *substream,
1326 				       struct snd_pcm_hw_params *hw_params)
1327 {
1328 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1329 	unsigned int old_bits = 0, change = 0;
1330 	int err;
1331 
1332 	err = snd_trident_allocate_pcm_mem(substream, hw_params);
1333 	if (err < 0)
1334 		return err;
1335 
1336 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
1337 		err = snd_trident_allocate_evoice(substream, hw_params);
1338 		if (err < 0)
1339 			return err;
1340 	}
1341 
1342 	/* prepare SPDIF channel */
1343 	spin_lock_irq(&trident->reg_lock);
1344 	old_bits = trident->spdif_pcm_bits;
1345 	if (old_bits & IEC958_AES0_PROFESSIONAL)
1346 		trident->spdif_pcm_bits &= ~IEC958_AES0_PRO_FS;
1347 	else
1348 		trident->spdif_pcm_bits &= ~(IEC958_AES3_CON_FS << 24);
1349 	if (params_rate(hw_params) >= 48000) {
1350 		trident->spdif_pcm_ctrl = 0x3c;	// 48000 Hz
1351 		trident->spdif_pcm_bits |=
1352 			trident->spdif_bits & IEC958_AES0_PROFESSIONAL ?
1353 				IEC958_AES0_PRO_FS_48000 :
1354 				(IEC958_AES3_CON_FS_48000 << 24);
1355 	}
1356 	else if (params_rate(hw_params) >= 44100) {
1357 		trident->spdif_pcm_ctrl = 0x3e;	// 44100 Hz
1358 		trident->spdif_pcm_bits |=
1359 			trident->spdif_bits & IEC958_AES0_PROFESSIONAL ?
1360 				IEC958_AES0_PRO_FS_44100 :
1361 				(IEC958_AES3_CON_FS_44100 << 24);
1362 	}
1363 	else {
1364 		trident->spdif_pcm_ctrl = 0x3d;	// 32000 Hz
1365 		trident->spdif_pcm_bits |=
1366 			trident->spdif_bits & IEC958_AES0_PROFESSIONAL ?
1367 				IEC958_AES0_PRO_FS_32000 :
1368 				(IEC958_AES3_CON_FS_32000 << 24);
1369 	}
1370 	change = old_bits != trident->spdif_pcm_bits;
1371 	spin_unlock_irq(&trident->reg_lock);
1372 
1373 	if (change)
1374 		snd_ctl_notify(trident->card, SNDRV_CTL_EVENT_MASK_VALUE, &trident->spdif_pcm_ctl->id);
1375 
1376 	return 0;
1377 }
1378 
1379 /*---------------------------------------------------------------------------
1380    snd_trident_spdif_prepare
1381 
1382    Description: Prepare SPDIF device for playback.
1383 
1384    Parameters:  substream  - PCM substream class
1385 
1386    Returns:     Error status
1387 
1388   ---------------------------------------------------------------------------*/
1389 
1390 static int snd_trident_spdif_prepare(struct snd_pcm_substream *substream)
1391 {
1392 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1393 	struct snd_pcm_runtime *runtime = substream->runtime;
1394 	struct snd_trident_voice *voice = runtime->private_data;
1395 	struct snd_trident_voice *evoice = voice->extra;
1396 	struct snd_trident_pcm_mixer *mix = &trident->pcm_mixer[substream->number];
1397 	unsigned int RESO, LBAO;
1398 	unsigned int temp;
1399 
1400 	spin_lock_irq(&trident->reg_lock);
1401 
1402 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
1403 
1404 		/* set delta (rate) value */
1405 		voice->Delta = snd_trident_convert_rate(runtime->rate);
1406 		voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
1407 
1408 		/* set Loop Back Address */
1409 		LBAO = runtime->dma_addr;
1410 		if (voice->memblk)
1411 			voice->LBA = voice->memblk->offset;
1412 		else
1413 			voice->LBA = LBAO;
1414 
1415 		voice->isync = 1;
1416 		voice->isync3 = 1;
1417 		voice->isync_mark = runtime->period_size;
1418 		voice->isync_max = runtime->buffer_size;
1419 
1420 		/* set target ESO for channel */
1421 		RESO = runtime->buffer_size - 1;
1422 		voice->ESO = voice->isync_ESO = (runtime->period_size * 2) + 6 - 1;
1423 
1424 		/* set ctrl mode */
1425 		voice->CTRL = snd_trident_control_mode(substream);
1426 
1427 		voice->FMC = 3;
1428 		voice->RVol = 0x7f;
1429 		voice->CVol = 0x7f;
1430 		voice->GVSel = 1;
1431 		voice->Pan = 0x7f;
1432 		voice->Vol = 0x3ff;
1433 		voice->EC = 0;
1434 		voice->CSO = 0;
1435 		voice->Alpha = 0;
1436 		voice->FMS = 0;
1437 		voice->Attribute = 0;
1438 
1439 		/* prepare surrogate IRQ channel */
1440 		snd_trident_write_voice_regs(trident, voice);
1441 
1442 		outw((RESO & 0xffff), TRID_REG(trident, NX_SPESO));
1443 		outb((RESO >> 16), TRID_REG(trident, NX_SPESO + 2));
1444 		outl((LBAO & 0xfffffffc), TRID_REG(trident, NX_SPLBA));
1445 		outw((voice->CSO & 0xffff), TRID_REG(trident, NX_SPCTRL_SPCSO));
1446 		outb((voice->CSO >> 16), TRID_REG(trident, NX_SPCTRL_SPCSO + 2));
1447 
1448 		/* set SPDIF setting */
1449 		outb(trident->spdif_pcm_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
1450 		outl(trident->spdif_pcm_bits, TRID_REG(trident, NX_SPCSTATUS));
1451 
1452 	} else {	/* SiS */
1453 
1454 		/* set delta (rate) value */
1455 		voice->Delta = 0x800;
1456 		voice->spurious_threshold = snd_trident_spurious_threshold(48000, runtime->period_size);
1457 
1458 		/* set Loop Begin Address */
1459 		if (voice->memblk)
1460 			voice->LBA = voice->memblk->offset;
1461 		else
1462 			voice->LBA = runtime->dma_addr;
1463 
1464 		voice->CSO = 0;
1465 		voice->ESO = runtime->buffer_size - 1;	/* in samples */
1466 		voice->CTRL = snd_trident_control_mode(substream);
1467 		voice->FMC = 3;
1468 		voice->GVSel = 1;
1469 		voice->EC = 0;
1470 		voice->Alpha = 0;
1471 		voice->FMS = 0;
1472 		voice->Vol = mix->vol;
1473 		voice->RVol = mix->rvol;
1474 		voice->CVol = mix->cvol;
1475 		voice->Pan = mix->pan;
1476 		voice->Attribute = (1<<(30-16))|(7<<(26-16))|
1477 				   (0<<(24-16))|(0<<(19-16));
1478 
1479 		snd_trident_write_voice_regs(trident, voice);
1480 
1481 		if (evoice != NULL) {
1482 			evoice->Delta = voice->Delta;
1483 			evoice->spurious_threshold = voice->spurious_threshold;
1484 			evoice->LBA = voice->LBA;
1485 			evoice->CSO = 0;
1486 			evoice->ESO = (runtime->period_size * 2) + 4 - 1; /* in samples */
1487 			evoice->CTRL = voice->CTRL;
1488 			evoice->FMC = 3;
1489 			evoice->GVSel = trident->device == TRIDENT_DEVICE_ID_SI7018 ? 0 : 1;
1490 			evoice->EC = 0;
1491 			evoice->Alpha = 0;
1492 			evoice->FMS = 0;
1493 			evoice->Vol = 0x3ff;			/* mute */
1494 			evoice->RVol = evoice->CVol = 0x7f;	/* mute */
1495 			evoice->Pan = 0x7f;			/* mute */
1496 			evoice->Attribute = 0;
1497 			snd_trident_write_voice_regs(trident, evoice);
1498 			evoice->isync2 = 1;
1499 			evoice->isync_mark = runtime->period_size;
1500 			evoice->ESO = (runtime->period_size * 2) - 1;
1501 		}
1502 
1503 		outl(trident->spdif_pcm_bits, TRID_REG(trident, SI_SPDIF_CS));
1504 		temp = inl(TRID_REG(trident, T4D_LFO_GC_CIR));
1505 		temp &= ~(1<<19);
1506 		outl(temp, TRID_REG(trident, T4D_LFO_GC_CIR));
1507 		temp = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1508 		temp |= SPDIF_EN;
1509 		outl(temp, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1510 	}
1511 
1512 	spin_unlock_irq(&trident->reg_lock);
1513 
1514 	return 0;
1515 }
1516 
1517 /*---------------------------------------------------------------------------
1518    snd_trident_trigger
1519 
1520    Description: Start/stop devices
1521 
1522    Parameters:  substream  - PCM substream class
1523    		cmd	- trigger command (STOP, GO)
1524 
1525    Returns:     Error status
1526 
1527   ---------------------------------------------------------------------------*/
1528 
1529 static int snd_trident_trigger(struct snd_pcm_substream *substream,
1530 			       int cmd)
1531 
1532 {
1533 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1534 	struct snd_pcm_substream *s;
1535 	unsigned int what, whati, capture_flag, spdif_flag;
1536 	struct snd_trident_voice *voice, *evoice;
1537 	unsigned int val, go;
1538 
1539 	switch (cmd) {
1540 	case SNDRV_PCM_TRIGGER_START:
1541 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1542 	case SNDRV_PCM_TRIGGER_RESUME:
1543 		go = 1;
1544 		break;
1545 	case SNDRV_PCM_TRIGGER_STOP:
1546 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1547 	case SNDRV_PCM_TRIGGER_SUSPEND:
1548 		go = 0;
1549 		break;
1550 	default:
1551 		return -EINVAL;
1552 	}
1553 	what = whati = capture_flag = spdif_flag = 0;
1554 	spin_lock(&trident->reg_lock);
1555 	val = inl(TRID_REG(trident, T4D_STIMER)) & 0x00ffffff;
1556 	snd_pcm_group_for_each_entry(s, substream) {
1557 		if ((struct snd_trident *) snd_pcm_substream_chip(s) == trident) {
1558 			voice = s->runtime->private_data;
1559 			evoice = voice->extra;
1560 			what |= 1 << (voice->number & 0x1f);
1561 			if (evoice == NULL) {
1562 				whati |= 1 << (voice->number & 0x1f);
1563 			} else {
1564 				what |= 1 << (evoice->number & 0x1f);
1565 				whati |= 1 << (evoice->number & 0x1f);
1566 				if (go)
1567 					evoice->stimer = val;
1568 			}
1569 			if (go) {
1570 				voice->running = 1;
1571 				voice->stimer = val;
1572 			} else {
1573 				voice->running = 0;
1574 			}
1575 			snd_pcm_trigger_done(s, substream);
1576 			if (voice->capture)
1577 				capture_flag = 1;
1578 			if (voice->spdif)
1579 				spdif_flag = 1;
1580 		}
1581 	}
1582 	if (spdif_flag) {
1583 		if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
1584 			outl(trident->spdif_pcm_bits, TRID_REG(trident, NX_SPCSTATUS));
1585 			val = trident->spdif_pcm_ctrl;
1586 			if (!go)
1587 				val &= ~(0x28);
1588 			outb(val, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
1589 		} else {
1590 			outl(trident->spdif_pcm_bits, TRID_REG(trident, SI_SPDIF_CS));
1591 			val = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) | SPDIF_EN;
1592 			outl(val, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1593 		}
1594 	}
1595 	if (!go)
1596 		outl(what, TRID_REG(trident, T4D_STOP_B));
1597 	val = inl(TRID_REG(trident, T4D_AINTEN_B));
1598 	if (go) {
1599 		val |= whati;
1600 	} else {
1601 		val &= ~whati;
1602 	}
1603 	outl(val, TRID_REG(trident, T4D_AINTEN_B));
1604 	if (go) {
1605 		outl(what, TRID_REG(trident, T4D_START_B));
1606 
1607 		if (capture_flag && trident->device != TRIDENT_DEVICE_ID_SI7018)
1608 			outb(trident->bDMAStart, TRID_REG(trident, T4D_SBCTRL_SBE2R_SBDD));
1609 	} else {
1610 		if (capture_flag && trident->device != TRIDENT_DEVICE_ID_SI7018)
1611 			outb(0x00, TRID_REG(trident, T4D_SBCTRL_SBE2R_SBDD));
1612 	}
1613 	spin_unlock(&trident->reg_lock);
1614 	return 0;
1615 }
1616 
1617 /*---------------------------------------------------------------------------
1618    snd_trident_playback_pointer
1619 
1620    Description: This routine return the playback position
1621 
1622    Parameters:	substream  - PCM substream class
1623 
1624    Returns:     position of buffer
1625 
1626   ---------------------------------------------------------------------------*/
1627 
1628 static snd_pcm_uframes_t snd_trident_playback_pointer(struct snd_pcm_substream *substream)
1629 {
1630 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1631 	struct snd_pcm_runtime *runtime = substream->runtime;
1632 	struct snd_trident_voice *voice = runtime->private_data;
1633 	unsigned int cso;
1634 
1635 	if (!voice->running)
1636 		return 0;
1637 
1638 	spin_lock(&trident->reg_lock);
1639 
1640 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
1641 
1642 	if (trident->device != TRIDENT_DEVICE_ID_NX) {
1643 		cso = inw(TRID_REG(trident, CH_DX_CSO_ALPHA_FMS + 2));
1644 	} else {		// ID_4DWAVE_NX
1645 		cso = (unsigned int) inl(TRID_REG(trident, CH_NX_DELTA_CSO)) & 0x00ffffff;
1646 	}
1647 
1648 	spin_unlock(&trident->reg_lock);
1649 
1650 	if (cso >= runtime->buffer_size)
1651 		cso = 0;
1652 
1653 	return cso;
1654 }
1655 
1656 /*---------------------------------------------------------------------------
1657    snd_trident_capture_pointer
1658 
1659    Description: This routine return the capture position
1660 
1661    Parameters:   pcm1    - PCM device class
1662 
1663    Returns:     position of buffer
1664 
1665   ---------------------------------------------------------------------------*/
1666 
1667 static snd_pcm_uframes_t snd_trident_capture_pointer(struct snd_pcm_substream *substream)
1668 {
1669 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1670 	struct snd_pcm_runtime *runtime = substream->runtime;
1671 	struct snd_trident_voice *voice = runtime->private_data;
1672 	unsigned int result;
1673 
1674 	if (!voice->running)
1675 		return 0;
1676 
1677 	result = inw(TRID_REG(trident, T4D_SBBL_SBCL));
1678 	if (runtime->channels > 1)
1679 		result >>= 1;
1680 	if (result > 0)
1681 		result = runtime->buffer_size - result;
1682 
1683 	return result;
1684 }
1685 
1686 /*---------------------------------------------------------------------------
1687    snd_trident_spdif_pointer
1688 
1689    Description: This routine return the SPDIF playback position
1690 
1691    Parameters:	substream  - PCM substream class
1692 
1693    Returns:     position of buffer
1694 
1695   ---------------------------------------------------------------------------*/
1696 
1697 static snd_pcm_uframes_t snd_trident_spdif_pointer(struct snd_pcm_substream *substream)
1698 {
1699 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1700 	struct snd_pcm_runtime *runtime = substream->runtime;
1701 	struct snd_trident_voice *voice = runtime->private_data;
1702 	unsigned int result;
1703 
1704 	if (!voice->running)
1705 		return 0;
1706 
1707 	result = inl(TRID_REG(trident, NX_SPCTRL_SPCSO)) & 0x00ffffff;
1708 
1709 	return result;
1710 }
1711 
1712 /*
1713  *  Playback support device description
1714  */
1715 
1716 static const struct snd_pcm_hardware snd_trident_playback =
1717 {
1718 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1719 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1720 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1721 				 SNDRV_PCM_INFO_PAUSE /* | SNDRV_PCM_INFO_RESUME */),
1722 	.formats =		(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
1723 				 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
1724 	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
1725 	.rate_min =		4000,
1726 	.rate_max =		48000,
1727 	.channels_min =		1,
1728 	.channels_max =		2,
1729 	.buffer_bytes_max =	(256*1024),
1730 	.period_bytes_min =	64,
1731 	.period_bytes_max =	(256*1024),
1732 	.periods_min =		1,
1733 	.periods_max =		1024,
1734 	.fifo_size =		0,
1735 };
1736 
1737 /*
1738  *  Capture support device description
1739  */
1740 
1741 static const struct snd_pcm_hardware snd_trident_capture =
1742 {
1743 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1744 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1745 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1746 				 SNDRV_PCM_INFO_PAUSE /* | SNDRV_PCM_INFO_RESUME */),
1747 	.formats =		(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
1748 				 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
1749 	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
1750 	.rate_min =		4000,
1751 	.rate_max =		48000,
1752 	.channels_min =		1,
1753 	.channels_max =		2,
1754 	.buffer_bytes_max =	(128*1024),
1755 	.period_bytes_min =	64,
1756 	.period_bytes_max =	(128*1024),
1757 	.periods_min =		1,
1758 	.periods_max =		1024,
1759 	.fifo_size =		0,
1760 };
1761 
1762 /*
1763  *  Foldback capture support device description
1764  */
1765 
1766 static const struct snd_pcm_hardware snd_trident_foldback =
1767 {
1768 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1769 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1770 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1771 				 SNDRV_PCM_INFO_PAUSE /* | SNDRV_PCM_INFO_RESUME */),
1772 	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
1773 	.rates =		SNDRV_PCM_RATE_48000,
1774 	.rate_min =		48000,
1775 	.rate_max =		48000,
1776 	.channels_min =		2,
1777 	.channels_max =		2,
1778 	.buffer_bytes_max =	(128*1024),
1779 	.period_bytes_min =	64,
1780 	.period_bytes_max =	(128*1024),
1781 	.periods_min =		1,
1782 	.periods_max =		1024,
1783 	.fifo_size =		0,
1784 };
1785 
1786 /*
1787  *  SPDIF playback support device description
1788  */
1789 
1790 static const struct snd_pcm_hardware snd_trident_spdif =
1791 {
1792 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1793 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1794 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1795 				 SNDRV_PCM_INFO_PAUSE /* | SNDRV_PCM_INFO_RESUME */),
1796 	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
1797 	.rates =		(SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
1798 				 SNDRV_PCM_RATE_48000),
1799 	.rate_min =		32000,
1800 	.rate_max =		48000,
1801 	.channels_min =		2,
1802 	.channels_max =		2,
1803 	.buffer_bytes_max =	(128*1024),
1804 	.period_bytes_min =	64,
1805 	.period_bytes_max =	(128*1024),
1806 	.periods_min =		1,
1807 	.periods_max =		1024,
1808 	.fifo_size =		0,
1809 };
1810 
1811 static const struct snd_pcm_hardware snd_trident_spdif_7018 =
1812 {
1813 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1814 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1815 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1816 				 SNDRV_PCM_INFO_PAUSE /* | SNDRV_PCM_INFO_RESUME */),
1817 	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
1818 	.rates =		SNDRV_PCM_RATE_48000,
1819 	.rate_min =		48000,
1820 	.rate_max =		48000,
1821 	.channels_min =		2,
1822 	.channels_max =		2,
1823 	.buffer_bytes_max =	(128*1024),
1824 	.period_bytes_min =	64,
1825 	.period_bytes_max =	(128*1024),
1826 	.periods_min =		1,
1827 	.periods_max =		1024,
1828 	.fifo_size =		0,
1829 };
1830 
1831 static void snd_trident_pcm_free_substream(struct snd_pcm_runtime *runtime)
1832 {
1833 	struct snd_trident_voice *voice = runtime->private_data;
1834 	struct snd_trident *trident;
1835 
1836 	if (voice) {
1837 		trident = voice->trident;
1838 		snd_trident_free_voice(trident, voice);
1839 	}
1840 }
1841 
1842 static int snd_trident_playback_open(struct snd_pcm_substream *substream)
1843 {
1844 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1845 	struct snd_pcm_runtime *runtime = substream->runtime;
1846 	struct snd_trident_voice *voice;
1847 
1848 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
1849 	if (voice == NULL)
1850 		return -EAGAIN;
1851 	snd_trident_pcm_mixer_build(trident, voice, substream);
1852 	voice->substream = substream;
1853 	runtime->private_data = voice;
1854 	runtime->private_free = snd_trident_pcm_free_substream;
1855 	runtime->hw = snd_trident_playback;
1856 	snd_pcm_set_sync(substream);
1857 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
1858 	return 0;
1859 }
1860 
1861 /*---------------------------------------------------------------------------
1862    snd_trident_playback_close
1863 
1864    Description: This routine will close the 4DWave playback device. For now
1865                 we will simply free the dma transfer buffer.
1866 
1867    Parameters:	substream  - PCM substream class
1868 
1869   ---------------------------------------------------------------------------*/
1870 static int snd_trident_playback_close(struct snd_pcm_substream *substream)
1871 {
1872 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1873 	struct snd_pcm_runtime *runtime = substream->runtime;
1874 	struct snd_trident_voice *voice = runtime->private_data;
1875 
1876 	snd_trident_pcm_mixer_free(trident, voice, substream);
1877 	return 0;
1878 }
1879 
1880 /*---------------------------------------------------------------------------
1881    snd_trident_spdif_open
1882 
1883    Description: This routine will open the 4DWave SPDIF device.
1884 
1885    Parameters:	substream  - PCM substream class
1886 
1887    Returns:     status  - success or failure flag
1888 
1889   ---------------------------------------------------------------------------*/
1890 
1891 static int snd_trident_spdif_open(struct snd_pcm_substream *substream)
1892 {
1893 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1894 	struct snd_trident_voice *voice;
1895 	struct snd_pcm_runtime *runtime = substream->runtime;
1896 
1897 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
1898 	if (voice == NULL)
1899 		return -EAGAIN;
1900 	voice->spdif = 1;
1901 	voice->substream = substream;
1902 	spin_lock_irq(&trident->reg_lock);
1903 	trident->spdif_pcm_bits = trident->spdif_bits;
1904 	spin_unlock_irq(&trident->reg_lock);
1905 
1906 	runtime->private_data = voice;
1907 	runtime->private_free = snd_trident_pcm_free_substream;
1908 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
1909 		runtime->hw = snd_trident_spdif;
1910 	} else {
1911 		runtime->hw = snd_trident_spdif_7018;
1912 	}
1913 
1914 	trident->spdif_pcm_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1915 	snd_ctl_notify(trident->card, SNDRV_CTL_EVENT_MASK_VALUE |
1916 		       SNDRV_CTL_EVENT_MASK_INFO, &trident->spdif_pcm_ctl->id);
1917 
1918 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
1919 	return 0;
1920 }
1921 
1922 
1923 /*---------------------------------------------------------------------------
1924    snd_trident_spdif_close
1925 
1926    Description: This routine will close the 4DWave SPDIF device.
1927 
1928    Parameters:	substream  - PCM substream class
1929 
1930   ---------------------------------------------------------------------------*/
1931 
1932 static int snd_trident_spdif_close(struct snd_pcm_substream *substream)
1933 {
1934 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1935 	unsigned int temp;
1936 
1937 	spin_lock_irq(&trident->reg_lock);
1938 	// restore default SPDIF setting
1939 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
1940 		outb(trident->spdif_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
1941 		outl(trident->spdif_bits, TRID_REG(trident, NX_SPCSTATUS));
1942 	} else {
1943 		outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
1944 		temp = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1945 		if (trident->spdif_ctrl) {
1946 			temp |= SPDIF_EN;
1947 		} else {
1948 			temp &= ~SPDIF_EN;
1949 		}
1950 		outl(temp, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1951 	}
1952 	spin_unlock_irq(&trident->reg_lock);
1953 	trident->spdif_pcm_ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1954 	snd_ctl_notify(trident->card, SNDRV_CTL_EVENT_MASK_VALUE |
1955 		       SNDRV_CTL_EVENT_MASK_INFO, &trident->spdif_pcm_ctl->id);
1956 	return 0;
1957 }
1958 
1959 /*---------------------------------------------------------------------------
1960    snd_trident_capture_open
1961 
1962    Description: This routine will open the 4DWave capture device.
1963 
1964    Parameters:	substream  - PCM substream class
1965 
1966    Returns:     status  - success or failure flag
1967 
1968   ---------------------------------------------------------------------------*/
1969 
1970 static int snd_trident_capture_open(struct snd_pcm_substream *substream)
1971 {
1972 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
1973 	struct snd_trident_voice *voice;
1974 	struct snd_pcm_runtime *runtime = substream->runtime;
1975 
1976 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
1977 	if (voice == NULL)
1978 		return -EAGAIN;
1979 	voice->capture = 1;
1980 	voice->substream = substream;
1981 	runtime->private_data = voice;
1982 	runtime->private_free = snd_trident_pcm_free_substream;
1983 	runtime->hw = snd_trident_capture;
1984 	snd_pcm_set_sync(substream);
1985 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
1986 	return 0;
1987 }
1988 
1989 /*---------------------------------------------------------------------------
1990    snd_trident_capture_close
1991 
1992    Description: This routine will close the 4DWave capture device. For now
1993                 we will simply free the dma transfer buffer.
1994 
1995    Parameters:	substream  - PCM substream class
1996 
1997   ---------------------------------------------------------------------------*/
1998 static int snd_trident_capture_close(struct snd_pcm_substream *substream)
1999 {
2000 	return 0;
2001 }
2002 
2003 /*---------------------------------------------------------------------------
2004    snd_trident_foldback_open
2005 
2006    Description: This routine will open the 4DWave foldback capture device.
2007 
2008    Parameters:	substream  - PCM substream class
2009 
2010    Returns:     status  - success or failure flag
2011 
2012   ---------------------------------------------------------------------------*/
2013 
2014 static int snd_trident_foldback_open(struct snd_pcm_substream *substream)
2015 {
2016 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
2017 	struct snd_trident_voice *voice;
2018 	struct snd_pcm_runtime *runtime = substream->runtime;
2019 
2020 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
2021 	if (voice == NULL)
2022 		return -EAGAIN;
2023 	voice->foldback_chan = substream->number;
2024 	voice->substream = substream;
2025 	runtime->private_data = voice;
2026 	runtime->private_free = snd_trident_pcm_free_substream;
2027 	runtime->hw = snd_trident_foldback;
2028 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
2029 	return 0;
2030 }
2031 
2032 /*---------------------------------------------------------------------------
2033    snd_trident_foldback_close
2034 
2035    Description: This routine will close the 4DWave foldback capture device.
2036 		For now we will simply free the dma transfer buffer.
2037 
2038    Parameters:	substream  - PCM substream class
2039 
2040   ---------------------------------------------------------------------------*/
2041 static int snd_trident_foldback_close(struct snd_pcm_substream *substream)
2042 {
2043 	struct snd_trident *trident = snd_pcm_substream_chip(substream);
2044 	struct snd_trident_voice *voice;
2045 	struct snd_pcm_runtime *runtime = substream->runtime;
2046 	voice = runtime->private_data;
2047 
2048 	/* stop capture channel */
2049 	spin_lock_irq(&trident->reg_lock);
2050 	outb(0x00, TRID_REG(trident, T4D_RCI + voice->foldback_chan));
2051 	spin_unlock_irq(&trident->reg_lock);
2052 	return 0;
2053 }
2054 
2055 /*---------------------------------------------------------------------------
2056    PCM operations
2057   ---------------------------------------------------------------------------*/
2058 
2059 static const struct snd_pcm_ops snd_trident_playback_ops = {
2060 	.open =		snd_trident_playback_open,
2061 	.close =	snd_trident_playback_close,
2062 	.ioctl =	snd_trident_ioctl,
2063 	.hw_params =	snd_trident_hw_params,
2064 	.hw_free =	snd_trident_hw_free,
2065 	.prepare =	snd_trident_playback_prepare,
2066 	.trigger =	snd_trident_trigger,
2067 	.pointer =	snd_trident_playback_pointer,
2068 };
2069 
2070 static const struct snd_pcm_ops snd_trident_nx_playback_ops = {
2071 	.open =		snd_trident_playback_open,
2072 	.close =	snd_trident_playback_close,
2073 	.ioctl =	snd_trident_ioctl,
2074 	.hw_params =	snd_trident_hw_params,
2075 	.hw_free =	snd_trident_hw_free,
2076 	.prepare =	snd_trident_playback_prepare,
2077 	.trigger =	snd_trident_trigger,
2078 	.pointer =	snd_trident_playback_pointer,
2079 	.page =		snd_pcm_sgbuf_ops_page,
2080 };
2081 
2082 static const struct snd_pcm_ops snd_trident_capture_ops = {
2083 	.open =		snd_trident_capture_open,
2084 	.close =	snd_trident_capture_close,
2085 	.ioctl =	snd_trident_ioctl,
2086 	.hw_params =	snd_trident_capture_hw_params,
2087 	.hw_free =	snd_trident_hw_free,
2088 	.prepare =	snd_trident_capture_prepare,
2089 	.trigger =	snd_trident_trigger,
2090 	.pointer =	snd_trident_capture_pointer,
2091 };
2092 
2093 static const struct snd_pcm_ops snd_trident_si7018_capture_ops = {
2094 	.open =		snd_trident_capture_open,
2095 	.close =	snd_trident_capture_close,
2096 	.ioctl =	snd_trident_ioctl,
2097 	.hw_params =	snd_trident_si7018_capture_hw_params,
2098 	.hw_free =	snd_trident_si7018_capture_hw_free,
2099 	.prepare =	snd_trident_si7018_capture_prepare,
2100 	.trigger =	snd_trident_trigger,
2101 	.pointer =	snd_trident_playback_pointer,
2102 };
2103 
2104 static const struct snd_pcm_ops snd_trident_foldback_ops = {
2105 	.open =		snd_trident_foldback_open,
2106 	.close =	snd_trident_foldback_close,
2107 	.ioctl =	snd_trident_ioctl,
2108 	.hw_params =	snd_trident_hw_params,
2109 	.hw_free =	snd_trident_hw_free,
2110 	.prepare =	snd_trident_foldback_prepare,
2111 	.trigger =	snd_trident_trigger,
2112 	.pointer =	snd_trident_playback_pointer,
2113 };
2114 
2115 static const struct snd_pcm_ops snd_trident_nx_foldback_ops = {
2116 	.open =		snd_trident_foldback_open,
2117 	.close =	snd_trident_foldback_close,
2118 	.ioctl =	snd_trident_ioctl,
2119 	.hw_params =	snd_trident_hw_params,
2120 	.hw_free =	snd_trident_hw_free,
2121 	.prepare =	snd_trident_foldback_prepare,
2122 	.trigger =	snd_trident_trigger,
2123 	.pointer =	snd_trident_playback_pointer,
2124 	.page =		snd_pcm_sgbuf_ops_page,
2125 };
2126 
2127 static const struct snd_pcm_ops snd_trident_spdif_ops = {
2128 	.open =		snd_trident_spdif_open,
2129 	.close =	snd_trident_spdif_close,
2130 	.ioctl =	snd_trident_ioctl,
2131 	.hw_params =	snd_trident_spdif_hw_params,
2132 	.hw_free =	snd_trident_hw_free,
2133 	.prepare =	snd_trident_spdif_prepare,
2134 	.trigger =	snd_trident_trigger,
2135 	.pointer =	snd_trident_spdif_pointer,
2136 };
2137 
2138 static const struct snd_pcm_ops snd_trident_spdif_7018_ops = {
2139 	.open =		snd_trident_spdif_open,
2140 	.close =	snd_trident_spdif_close,
2141 	.ioctl =	snd_trident_ioctl,
2142 	.hw_params =	snd_trident_spdif_hw_params,
2143 	.hw_free =	snd_trident_hw_free,
2144 	.prepare =	snd_trident_spdif_prepare,
2145 	.trigger =	snd_trident_trigger,
2146 	.pointer =	snd_trident_playback_pointer,
2147 };
2148 
2149 /*---------------------------------------------------------------------------
2150    snd_trident_pcm
2151 
2152    Description: This routine registers the 4DWave device for PCM support.
2153 
2154    Parameters:  trident - pointer to target device class for 4DWave.
2155 
2156    Returns:     None
2157 
2158   ---------------------------------------------------------------------------*/
2159 
2160 int snd_trident_pcm(struct snd_trident *trident, int device)
2161 {
2162 	struct snd_pcm *pcm;
2163 	int err;
2164 
2165 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx", device, trident->ChanPCM, 1, &pcm)) < 0)
2166 		return err;
2167 
2168 	pcm->private_data = trident;
2169 
2170 	if (trident->tlb.entries) {
2171 		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_nx_playback_ops);
2172 	} else {
2173 		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_playback_ops);
2174 	}
2175 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
2176 			trident->device != TRIDENT_DEVICE_ID_SI7018 ?
2177 			&snd_trident_capture_ops :
2178 			&snd_trident_si7018_capture_ops);
2179 
2180 	pcm->info_flags = 0;
2181 	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
2182 	strcpy(pcm->name, "Trident 4DWave");
2183 	trident->pcm = pcm;
2184 
2185 	if (trident->tlb.entries) {
2186 		struct snd_pcm_substream *substream;
2187 		for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next)
2188 			snd_pcm_lib_preallocate_pages(substream, SNDRV_DMA_TYPE_DEV_SG,
2189 						      snd_dma_pci_data(trident->pci),
2190 						      64*1024, 128*1024);
2191 		snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
2192 					      SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(trident->pci),
2193 					      64*1024, 128*1024);
2194 	} else {
2195 		snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
2196 						      snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
2197 	}
2198 
2199 	return 0;
2200 }
2201 
2202 /*---------------------------------------------------------------------------
2203    snd_trident_foldback_pcm
2204 
2205    Description: This routine registers the 4DWave device for foldback PCM support.
2206 
2207    Parameters:  trident - pointer to target device class for 4DWave.
2208 
2209    Returns:     None
2210 
2211   ---------------------------------------------------------------------------*/
2212 
2213 int snd_trident_foldback_pcm(struct snd_trident *trident, int device)
2214 {
2215 	struct snd_pcm *foldback;
2216 	int err;
2217 	int num_chan = 3;
2218 	struct snd_pcm_substream *substream;
2219 
2220 	if (trident->device == TRIDENT_DEVICE_ID_NX)
2221 		num_chan = 4;
2222 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx", device, 0, num_chan, &foldback)) < 0)
2223 		return err;
2224 
2225 	foldback->private_data = trident;
2226 	if (trident->tlb.entries)
2227 		snd_pcm_set_ops(foldback, SNDRV_PCM_STREAM_CAPTURE, &snd_trident_nx_foldback_ops);
2228 	else
2229 		snd_pcm_set_ops(foldback, SNDRV_PCM_STREAM_CAPTURE, &snd_trident_foldback_ops);
2230 	foldback->info_flags = 0;
2231 	strcpy(foldback->name, "Trident 4DWave");
2232 	substream = foldback->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
2233 	strcpy(substream->name, "Front Mixer");
2234 	substream = substream->next;
2235 	strcpy(substream->name, "Reverb Mixer");
2236 	substream = substream->next;
2237 	strcpy(substream->name, "Chorus Mixer");
2238 	if (num_chan == 4) {
2239 		substream = substream->next;
2240 		strcpy(substream->name, "Second AC'97 ADC");
2241 	}
2242 	trident->foldback = foldback;
2243 
2244 	if (trident->tlb.entries)
2245 		snd_pcm_lib_preallocate_pages_for_all(foldback, SNDRV_DMA_TYPE_DEV_SG,
2246 						      snd_dma_pci_data(trident->pci), 0, 128*1024);
2247 	else
2248 		snd_pcm_lib_preallocate_pages_for_all(foldback, SNDRV_DMA_TYPE_DEV,
2249 						      snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
2250 
2251 	return 0;
2252 }
2253 
2254 /*---------------------------------------------------------------------------
2255    snd_trident_spdif
2256 
2257    Description: This routine registers the 4DWave-NX device for SPDIF support.
2258 
2259    Parameters:  trident - pointer to target device class for 4DWave-NX.
2260 
2261    Returns:     None
2262 
2263   ---------------------------------------------------------------------------*/
2264 
2265 int snd_trident_spdif_pcm(struct snd_trident *trident, int device)
2266 {
2267 	struct snd_pcm *spdif;
2268 	int err;
2269 
2270 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx IEC958", device, 1, 0, &spdif)) < 0)
2271 		return err;
2272 
2273 	spdif->private_data = trident;
2274 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2275 		snd_pcm_set_ops(spdif, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_spdif_ops);
2276 	} else {
2277 		snd_pcm_set_ops(spdif, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_spdif_7018_ops);
2278 	}
2279 	spdif->info_flags = 0;
2280 	strcpy(spdif->name, "Trident 4DWave IEC958");
2281 	trident->spdif = spdif;
2282 
2283 	snd_pcm_lib_preallocate_pages_for_all(spdif, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
2284 
2285 	return 0;
2286 }
2287 
2288 /*
2289  *  Mixer part
2290  */
2291 
2292 
2293 /*---------------------------------------------------------------------------
2294     snd_trident_spdif_control
2295 
2296     Description: enable/disable S/PDIF out from ac97 mixer
2297   ---------------------------------------------------------------------------*/
2298 
2299 #define snd_trident_spdif_control_info	snd_ctl_boolean_mono_info
2300 
2301 static int snd_trident_spdif_control_get(struct snd_kcontrol *kcontrol,
2302 					 struct snd_ctl_elem_value *ucontrol)
2303 {
2304 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2305 	unsigned char val;
2306 
2307 	spin_lock_irq(&trident->reg_lock);
2308 	val = trident->spdif_ctrl;
2309 	ucontrol->value.integer.value[0] = val == kcontrol->private_value;
2310 	spin_unlock_irq(&trident->reg_lock);
2311 	return 0;
2312 }
2313 
2314 static int snd_trident_spdif_control_put(struct snd_kcontrol *kcontrol,
2315 					 struct snd_ctl_elem_value *ucontrol)
2316 {
2317 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2318 	unsigned char val;
2319 	int change;
2320 
2321 	val = ucontrol->value.integer.value[0] ? (unsigned char) kcontrol->private_value : 0x00;
2322 	spin_lock_irq(&trident->reg_lock);
2323 	/* S/PDIF C Channel bits 0-31 : 48khz, SCMS disabled */
2324 	change = trident->spdif_ctrl != val;
2325 	trident->spdif_ctrl = val;
2326 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2327 		if ((inb(TRID_REG(trident, NX_SPCTRL_SPCSO + 3)) & 0x10) == 0) {
2328 			outl(trident->spdif_bits, TRID_REG(trident, NX_SPCSTATUS));
2329 			outb(trident->spdif_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
2330 		}
2331 	} else {
2332 		if (trident->spdif == NULL) {
2333 			unsigned int temp;
2334 			outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
2335 			temp = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) & ~SPDIF_EN;
2336 			if (val)
2337 				temp |= SPDIF_EN;
2338 			outl(temp, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
2339 		}
2340 	}
2341 	spin_unlock_irq(&trident->reg_lock);
2342 	return change;
2343 }
2344 
2345 static const struct snd_kcontrol_new snd_trident_spdif_control =
2346 {
2347 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2348 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,SWITCH),
2349 	.info =		snd_trident_spdif_control_info,
2350 	.get =		snd_trident_spdif_control_get,
2351 	.put =		snd_trident_spdif_control_put,
2352 	.private_value = 0x28,
2353 };
2354 
2355 /*---------------------------------------------------------------------------
2356     snd_trident_spdif_default
2357 
2358     Description: put/get the S/PDIF default settings
2359   ---------------------------------------------------------------------------*/
2360 
2361 static int snd_trident_spdif_default_info(struct snd_kcontrol *kcontrol,
2362 					  struct snd_ctl_elem_info *uinfo)
2363 {
2364 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
2365 	uinfo->count = 1;
2366 	return 0;
2367 }
2368 
2369 static int snd_trident_spdif_default_get(struct snd_kcontrol *kcontrol,
2370 					 struct snd_ctl_elem_value *ucontrol)
2371 {
2372 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2373 
2374 	spin_lock_irq(&trident->reg_lock);
2375 	ucontrol->value.iec958.status[0] = (trident->spdif_bits >> 0) & 0xff;
2376 	ucontrol->value.iec958.status[1] = (trident->spdif_bits >> 8) & 0xff;
2377 	ucontrol->value.iec958.status[2] = (trident->spdif_bits >> 16) & 0xff;
2378 	ucontrol->value.iec958.status[3] = (trident->spdif_bits >> 24) & 0xff;
2379 	spin_unlock_irq(&trident->reg_lock);
2380 	return 0;
2381 }
2382 
2383 static int snd_trident_spdif_default_put(struct snd_kcontrol *kcontrol,
2384 					 struct snd_ctl_elem_value *ucontrol)
2385 {
2386 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2387 	unsigned int val;
2388 	int change;
2389 
2390 	val = (ucontrol->value.iec958.status[0] << 0) |
2391 	      (ucontrol->value.iec958.status[1] << 8) |
2392 	      (ucontrol->value.iec958.status[2] << 16) |
2393 	      (ucontrol->value.iec958.status[3] << 24);
2394 	spin_lock_irq(&trident->reg_lock);
2395 	change = trident->spdif_bits != val;
2396 	trident->spdif_bits = val;
2397 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2398 		if ((inb(TRID_REG(trident, NX_SPCTRL_SPCSO + 3)) & 0x10) == 0)
2399 			outl(trident->spdif_bits, TRID_REG(trident, NX_SPCSTATUS));
2400 	} else {
2401 		if (trident->spdif == NULL)
2402 			outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
2403 	}
2404 	spin_unlock_irq(&trident->reg_lock);
2405 	return change;
2406 }
2407 
2408 static const struct snd_kcontrol_new snd_trident_spdif_default =
2409 {
2410 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
2411 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
2412 	.info =		snd_trident_spdif_default_info,
2413 	.get =		snd_trident_spdif_default_get,
2414 	.put =		snd_trident_spdif_default_put
2415 };
2416 
2417 /*---------------------------------------------------------------------------
2418     snd_trident_spdif_mask
2419 
2420     Description: put/get the S/PDIF mask
2421   ---------------------------------------------------------------------------*/
2422 
2423 static int snd_trident_spdif_mask_info(struct snd_kcontrol *kcontrol,
2424 				       struct snd_ctl_elem_info *uinfo)
2425 {
2426 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
2427 	uinfo->count = 1;
2428 	return 0;
2429 }
2430 
2431 static int snd_trident_spdif_mask_get(struct snd_kcontrol *kcontrol,
2432 				      struct snd_ctl_elem_value *ucontrol)
2433 {
2434 	ucontrol->value.iec958.status[0] = 0xff;
2435 	ucontrol->value.iec958.status[1] = 0xff;
2436 	ucontrol->value.iec958.status[2] = 0xff;
2437 	ucontrol->value.iec958.status[3] = 0xff;
2438 	return 0;
2439 }
2440 
2441 static const struct snd_kcontrol_new snd_trident_spdif_mask =
2442 {
2443 	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
2444 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
2445 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
2446 	.info =		snd_trident_spdif_mask_info,
2447 	.get =		snd_trident_spdif_mask_get,
2448 };
2449 
2450 /*---------------------------------------------------------------------------
2451     snd_trident_spdif_stream
2452 
2453     Description: put/get the S/PDIF stream settings
2454   ---------------------------------------------------------------------------*/
2455 
2456 static int snd_trident_spdif_stream_info(struct snd_kcontrol *kcontrol,
2457 					 struct snd_ctl_elem_info *uinfo)
2458 {
2459 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
2460 	uinfo->count = 1;
2461 	return 0;
2462 }
2463 
2464 static int snd_trident_spdif_stream_get(struct snd_kcontrol *kcontrol,
2465 					struct snd_ctl_elem_value *ucontrol)
2466 {
2467 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2468 
2469 	spin_lock_irq(&trident->reg_lock);
2470 	ucontrol->value.iec958.status[0] = (trident->spdif_pcm_bits >> 0) & 0xff;
2471 	ucontrol->value.iec958.status[1] = (trident->spdif_pcm_bits >> 8) & 0xff;
2472 	ucontrol->value.iec958.status[2] = (trident->spdif_pcm_bits >> 16) & 0xff;
2473 	ucontrol->value.iec958.status[3] = (trident->spdif_pcm_bits >> 24) & 0xff;
2474 	spin_unlock_irq(&trident->reg_lock);
2475 	return 0;
2476 }
2477 
2478 static int snd_trident_spdif_stream_put(struct snd_kcontrol *kcontrol,
2479 					struct snd_ctl_elem_value *ucontrol)
2480 {
2481 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2482 	unsigned int val;
2483 	int change;
2484 
2485 	val = (ucontrol->value.iec958.status[0] << 0) |
2486 	      (ucontrol->value.iec958.status[1] << 8) |
2487 	      (ucontrol->value.iec958.status[2] << 16) |
2488 	      (ucontrol->value.iec958.status[3] << 24);
2489 	spin_lock_irq(&trident->reg_lock);
2490 	change = trident->spdif_pcm_bits != val;
2491 	trident->spdif_pcm_bits = val;
2492 	if (trident->spdif != NULL) {
2493 		if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2494 			outl(trident->spdif_pcm_bits, TRID_REG(trident, NX_SPCSTATUS));
2495 		} else {
2496 			outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
2497 		}
2498 	}
2499 	spin_unlock_irq(&trident->reg_lock);
2500 	return change;
2501 }
2502 
2503 static const struct snd_kcontrol_new snd_trident_spdif_stream =
2504 {
2505 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2506 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
2507 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM),
2508 	.info =		snd_trident_spdif_stream_info,
2509 	.get =		snd_trident_spdif_stream_get,
2510 	.put =		snd_trident_spdif_stream_put
2511 };
2512 
2513 /*---------------------------------------------------------------------------
2514     snd_trident_ac97_control
2515 
2516     Description: enable/disable rear path for ac97
2517   ---------------------------------------------------------------------------*/
2518 
2519 #define snd_trident_ac97_control_info	snd_ctl_boolean_mono_info
2520 
2521 static int snd_trident_ac97_control_get(struct snd_kcontrol *kcontrol,
2522 					struct snd_ctl_elem_value *ucontrol)
2523 {
2524 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2525 	unsigned char val;
2526 
2527 	spin_lock_irq(&trident->reg_lock);
2528 	val = trident->ac97_ctrl = inl(TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
2529 	ucontrol->value.integer.value[0] = (val & (1 << kcontrol->private_value)) ? 1 : 0;
2530 	spin_unlock_irq(&trident->reg_lock);
2531 	return 0;
2532 }
2533 
2534 static int snd_trident_ac97_control_put(struct snd_kcontrol *kcontrol,
2535 					struct snd_ctl_elem_value *ucontrol)
2536 {
2537 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2538 	unsigned char val;
2539 	int change = 0;
2540 
2541 	spin_lock_irq(&trident->reg_lock);
2542 	val = trident->ac97_ctrl = inl(TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
2543 	val &= ~(1 << kcontrol->private_value);
2544 	if (ucontrol->value.integer.value[0])
2545 		val |= 1 << kcontrol->private_value;
2546 	change = val != trident->ac97_ctrl;
2547 	trident->ac97_ctrl = val;
2548 	outl(trident->ac97_ctrl = val, TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
2549 	spin_unlock_irq(&trident->reg_lock);
2550 	return change;
2551 }
2552 
2553 static const struct snd_kcontrol_new snd_trident_ac97_rear_control =
2554 {
2555 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2556 	.name =         "Rear Path",
2557 	.info =		snd_trident_ac97_control_info,
2558 	.get =		snd_trident_ac97_control_get,
2559 	.put =		snd_trident_ac97_control_put,
2560 	.private_value = 4,
2561 };
2562 
2563 /*---------------------------------------------------------------------------
2564     snd_trident_vol_control
2565 
2566     Description: wave & music volume control
2567   ---------------------------------------------------------------------------*/
2568 
2569 static int snd_trident_vol_control_info(struct snd_kcontrol *kcontrol,
2570 					struct snd_ctl_elem_info *uinfo)
2571 {
2572 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2573 	uinfo->count = 2;
2574 	uinfo->value.integer.min = 0;
2575 	uinfo->value.integer.max = 255;
2576 	return 0;
2577 }
2578 
2579 static int snd_trident_vol_control_get(struct snd_kcontrol *kcontrol,
2580 				       struct snd_ctl_elem_value *ucontrol)
2581 {
2582 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2583 	unsigned int val;
2584 
2585 	val = trident->musicvol_wavevol;
2586 	ucontrol->value.integer.value[0] = 255 - ((val >> kcontrol->private_value) & 0xff);
2587 	ucontrol->value.integer.value[1] = 255 - ((val >> (kcontrol->private_value + 8)) & 0xff);
2588 	return 0;
2589 }
2590 
2591 static const DECLARE_TLV_DB_SCALE(db_scale_gvol, -6375, 25, 0);
2592 
2593 static int snd_trident_vol_control_put(struct snd_kcontrol *kcontrol,
2594 				       struct snd_ctl_elem_value *ucontrol)
2595 {
2596 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2597 	unsigned int val;
2598 	int change = 0;
2599 
2600 	spin_lock_irq(&trident->reg_lock);
2601 	val = trident->musicvol_wavevol;
2602 	val &= ~(0xffff << kcontrol->private_value);
2603 	val |= ((255 - (ucontrol->value.integer.value[0] & 0xff)) |
2604 	        ((255 - (ucontrol->value.integer.value[1] & 0xff)) << 8)) << kcontrol->private_value;
2605 	change = val != trident->musicvol_wavevol;
2606 	outl(trident->musicvol_wavevol = val, TRID_REG(trident, T4D_MUSICVOL_WAVEVOL));
2607 	spin_unlock_irq(&trident->reg_lock);
2608 	return change;
2609 }
2610 
2611 static const struct snd_kcontrol_new snd_trident_vol_music_control =
2612 {
2613 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2614 	.name =         "Music Playback Volume",
2615 	.info =		snd_trident_vol_control_info,
2616 	.get =		snd_trident_vol_control_get,
2617 	.put =		snd_trident_vol_control_put,
2618 	.private_value = 16,
2619 	.tlv = { .p = db_scale_gvol },
2620 };
2621 
2622 static const struct snd_kcontrol_new snd_trident_vol_wave_control =
2623 {
2624 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2625 	.name =         "Wave Playback Volume",
2626 	.info =		snd_trident_vol_control_info,
2627 	.get =		snd_trident_vol_control_get,
2628 	.put =		snd_trident_vol_control_put,
2629 	.private_value = 0,
2630 	.tlv = { .p = db_scale_gvol },
2631 };
2632 
2633 /*---------------------------------------------------------------------------
2634     snd_trident_pcm_vol_control
2635 
2636     Description: PCM front volume control
2637   ---------------------------------------------------------------------------*/
2638 
2639 static int snd_trident_pcm_vol_control_info(struct snd_kcontrol *kcontrol,
2640 					    struct snd_ctl_elem_info *uinfo)
2641 {
2642 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2643 
2644 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2645 	uinfo->count = 1;
2646 	uinfo->value.integer.min = 0;
2647 	uinfo->value.integer.max = 255;
2648 	if (trident->device == TRIDENT_DEVICE_ID_SI7018)
2649 		uinfo->value.integer.max = 1023;
2650 	return 0;
2651 }
2652 
2653 static int snd_trident_pcm_vol_control_get(struct snd_kcontrol *kcontrol,
2654 					   struct snd_ctl_elem_value *ucontrol)
2655 {
2656 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2657 	struct snd_trident_pcm_mixer *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2658 
2659 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
2660 		ucontrol->value.integer.value[0] = 1023 - mix->vol;
2661 	} else {
2662 		ucontrol->value.integer.value[0] = 255 - (mix->vol>>2);
2663 	}
2664 	return 0;
2665 }
2666 
2667 static int snd_trident_pcm_vol_control_put(struct snd_kcontrol *kcontrol,
2668 					   struct snd_ctl_elem_value *ucontrol)
2669 {
2670 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2671 	struct snd_trident_pcm_mixer *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2672 	unsigned int val;
2673 	int change = 0;
2674 
2675 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
2676 		val = 1023 - (ucontrol->value.integer.value[0] & 1023);
2677 	} else {
2678 		val = (255 - (ucontrol->value.integer.value[0] & 255)) << 2;
2679 	}
2680 	spin_lock_irq(&trident->reg_lock);
2681 	change = val != mix->vol;
2682 	mix->vol = val;
2683 	if (mix->voice != NULL)
2684 		snd_trident_write_vol_reg(trident, mix->voice, val);
2685 	spin_unlock_irq(&trident->reg_lock);
2686 	return change;
2687 }
2688 
2689 static const struct snd_kcontrol_new snd_trident_pcm_vol_control =
2690 {
2691 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2692 	.name =         "PCM Front Playback Volume",
2693 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2694 	.count =	32,
2695 	.info =		snd_trident_pcm_vol_control_info,
2696 	.get =		snd_trident_pcm_vol_control_get,
2697 	.put =		snd_trident_pcm_vol_control_put,
2698 	/* FIXME: no tlv yet */
2699 };
2700 
2701 /*---------------------------------------------------------------------------
2702     snd_trident_pcm_pan_control
2703 
2704     Description: PCM front pan control
2705   ---------------------------------------------------------------------------*/
2706 
2707 static int snd_trident_pcm_pan_control_info(struct snd_kcontrol *kcontrol,
2708 					    struct snd_ctl_elem_info *uinfo)
2709 {
2710 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2711 	uinfo->count = 1;
2712 	uinfo->value.integer.min = 0;
2713 	uinfo->value.integer.max = 127;
2714 	return 0;
2715 }
2716 
2717 static int snd_trident_pcm_pan_control_get(struct snd_kcontrol *kcontrol,
2718 					   struct snd_ctl_elem_value *ucontrol)
2719 {
2720 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2721 	struct snd_trident_pcm_mixer *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2722 
2723 	ucontrol->value.integer.value[0] = mix->pan;
2724 	if (ucontrol->value.integer.value[0] & 0x40) {
2725 		ucontrol->value.integer.value[0] = (0x3f - (ucontrol->value.integer.value[0] & 0x3f));
2726 	} else {
2727 		ucontrol->value.integer.value[0] |= 0x40;
2728 	}
2729 	return 0;
2730 }
2731 
2732 static int snd_trident_pcm_pan_control_put(struct snd_kcontrol *kcontrol,
2733 					   struct snd_ctl_elem_value *ucontrol)
2734 {
2735 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2736 	struct snd_trident_pcm_mixer *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2737 	unsigned char val;
2738 	int change = 0;
2739 
2740 	if (ucontrol->value.integer.value[0] & 0x40)
2741 		val = ucontrol->value.integer.value[0] & 0x3f;
2742 	else
2743 		val = (0x3f - (ucontrol->value.integer.value[0] & 0x3f)) | 0x40;
2744 	spin_lock_irq(&trident->reg_lock);
2745 	change = val != mix->pan;
2746 	mix->pan = val;
2747 	if (mix->voice != NULL)
2748 		snd_trident_write_pan_reg(trident, mix->voice, val);
2749 	spin_unlock_irq(&trident->reg_lock);
2750 	return change;
2751 }
2752 
2753 static const struct snd_kcontrol_new snd_trident_pcm_pan_control =
2754 {
2755 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2756 	.name =         "PCM Pan Playback Control",
2757 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2758 	.count =	32,
2759 	.info =		snd_trident_pcm_pan_control_info,
2760 	.get =		snd_trident_pcm_pan_control_get,
2761 	.put =		snd_trident_pcm_pan_control_put,
2762 };
2763 
2764 /*---------------------------------------------------------------------------
2765     snd_trident_pcm_rvol_control
2766 
2767     Description: PCM reverb volume control
2768   ---------------------------------------------------------------------------*/
2769 
2770 static int snd_trident_pcm_rvol_control_info(struct snd_kcontrol *kcontrol,
2771 					     struct snd_ctl_elem_info *uinfo)
2772 {
2773 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2774 	uinfo->count = 1;
2775 	uinfo->value.integer.min = 0;
2776 	uinfo->value.integer.max = 127;
2777 	return 0;
2778 }
2779 
2780 static int snd_trident_pcm_rvol_control_get(struct snd_kcontrol *kcontrol,
2781 					    struct snd_ctl_elem_value *ucontrol)
2782 {
2783 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2784 	struct snd_trident_pcm_mixer *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2785 
2786 	ucontrol->value.integer.value[0] = 127 - mix->rvol;
2787 	return 0;
2788 }
2789 
2790 static int snd_trident_pcm_rvol_control_put(struct snd_kcontrol *kcontrol,
2791 					    struct snd_ctl_elem_value *ucontrol)
2792 {
2793 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2794 	struct snd_trident_pcm_mixer *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2795 	unsigned short val;
2796 	int change = 0;
2797 
2798 	val = 0x7f - (ucontrol->value.integer.value[0] & 0x7f);
2799 	spin_lock_irq(&trident->reg_lock);
2800 	change = val != mix->rvol;
2801 	mix->rvol = val;
2802 	if (mix->voice != NULL)
2803 		snd_trident_write_rvol_reg(trident, mix->voice, val);
2804 	spin_unlock_irq(&trident->reg_lock);
2805 	return change;
2806 }
2807 
2808 static const DECLARE_TLV_DB_SCALE(db_scale_crvol, -3175, 25, 1);
2809 
2810 static const struct snd_kcontrol_new snd_trident_pcm_rvol_control =
2811 {
2812 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2813 	.name =         "PCM Reverb Playback Volume",
2814 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2815 	.count = 	32,
2816 	.info =		snd_trident_pcm_rvol_control_info,
2817 	.get =		snd_trident_pcm_rvol_control_get,
2818 	.put =		snd_trident_pcm_rvol_control_put,
2819 	.tlv = { .p = db_scale_crvol },
2820 };
2821 
2822 /*---------------------------------------------------------------------------
2823     snd_trident_pcm_cvol_control
2824 
2825     Description: PCM chorus volume control
2826   ---------------------------------------------------------------------------*/
2827 
2828 static int snd_trident_pcm_cvol_control_info(struct snd_kcontrol *kcontrol,
2829 					     struct snd_ctl_elem_info *uinfo)
2830 {
2831 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2832 	uinfo->count = 1;
2833 	uinfo->value.integer.min = 0;
2834 	uinfo->value.integer.max = 127;
2835 	return 0;
2836 }
2837 
2838 static int snd_trident_pcm_cvol_control_get(struct snd_kcontrol *kcontrol,
2839 					    struct snd_ctl_elem_value *ucontrol)
2840 {
2841 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2842 	struct snd_trident_pcm_mixer *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2843 
2844 	ucontrol->value.integer.value[0] = 127 - mix->cvol;
2845 	return 0;
2846 }
2847 
2848 static int snd_trident_pcm_cvol_control_put(struct snd_kcontrol *kcontrol,
2849 					    struct snd_ctl_elem_value *ucontrol)
2850 {
2851 	struct snd_trident *trident = snd_kcontrol_chip(kcontrol);
2852 	struct snd_trident_pcm_mixer *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2853 	unsigned short val;
2854 	int change = 0;
2855 
2856 	val = 0x7f - (ucontrol->value.integer.value[0] & 0x7f);
2857 	spin_lock_irq(&trident->reg_lock);
2858 	change = val != mix->cvol;
2859 	mix->cvol = val;
2860 	if (mix->voice != NULL)
2861 		snd_trident_write_cvol_reg(trident, mix->voice, val);
2862 	spin_unlock_irq(&trident->reg_lock);
2863 	return change;
2864 }
2865 
2866 static const struct snd_kcontrol_new snd_trident_pcm_cvol_control =
2867 {
2868 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2869 	.name =         "PCM Chorus Playback Volume",
2870 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2871 	.count =	32,
2872 	.info =		snd_trident_pcm_cvol_control_info,
2873 	.get =		snd_trident_pcm_cvol_control_get,
2874 	.put =		snd_trident_pcm_cvol_control_put,
2875 	.tlv = { .p = db_scale_crvol },
2876 };
2877 
2878 static void snd_trident_notify_pcm_change1(struct snd_card *card,
2879 					   struct snd_kcontrol *kctl,
2880 					   int num, int activate)
2881 {
2882 	struct snd_ctl_elem_id id;
2883 
2884 	if (! kctl)
2885 		return;
2886 	if (activate)
2887 		kctl->vd[num].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
2888 	else
2889 		kctl->vd[num].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
2890 	snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE |
2891 		       SNDRV_CTL_EVENT_MASK_INFO,
2892 		       snd_ctl_build_ioff(&id, kctl, num));
2893 }
2894 
2895 static void snd_trident_notify_pcm_change(struct snd_trident *trident,
2896 					  struct snd_trident_pcm_mixer *tmix,
2897 					  int num, int activate)
2898 {
2899 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_vol, num, activate);
2900 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_pan, num, activate);
2901 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_rvol, num, activate);
2902 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_cvol, num, activate);
2903 }
2904 
2905 static int snd_trident_pcm_mixer_build(struct snd_trident *trident,
2906 				       struct snd_trident_voice *voice,
2907 				       struct snd_pcm_substream *substream)
2908 {
2909 	struct snd_trident_pcm_mixer *tmix;
2910 
2911 	if (snd_BUG_ON(!trident || !voice || !substream))
2912 		return -EINVAL;
2913 	tmix = &trident->pcm_mixer[substream->number];
2914 	tmix->voice = voice;
2915 	tmix->vol = T4D_DEFAULT_PCM_VOL;
2916 	tmix->pan = T4D_DEFAULT_PCM_PAN;
2917 	tmix->rvol = T4D_DEFAULT_PCM_RVOL;
2918 	tmix->cvol = T4D_DEFAULT_PCM_CVOL;
2919 	snd_trident_notify_pcm_change(trident, tmix, substream->number, 1);
2920 	return 0;
2921 }
2922 
2923 static int snd_trident_pcm_mixer_free(struct snd_trident *trident, struct snd_trident_voice *voice, struct snd_pcm_substream *substream)
2924 {
2925 	struct snd_trident_pcm_mixer *tmix;
2926 
2927 	if (snd_BUG_ON(!trident || !substream))
2928 		return -EINVAL;
2929 	tmix = &trident->pcm_mixer[substream->number];
2930 	tmix->voice = NULL;
2931 	snd_trident_notify_pcm_change(trident, tmix, substream->number, 0);
2932 	return 0;
2933 }
2934 
2935 /*---------------------------------------------------------------------------
2936    snd_trident_mixer
2937 
2938    Description: This routine registers the 4DWave device for mixer support.
2939 
2940    Parameters:  trident - pointer to target device class for 4DWave.
2941 
2942    Returns:     None
2943 
2944   ---------------------------------------------------------------------------*/
2945 
2946 static int snd_trident_mixer(struct snd_trident *trident, int pcm_spdif_device)
2947 {
2948 	struct snd_ac97_template _ac97;
2949 	struct snd_card *card = trident->card;
2950 	struct snd_kcontrol *kctl;
2951 	struct snd_ctl_elem_value *uctl;
2952 	int idx, err, retries = 2;
2953 	static struct snd_ac97_bus_ops ops = {
2954 		.write = snd_trident_codec_write,
2955 		.read = snd_trident_codec_read,
2956 	};
2957 
2958 	uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
2959 	if (!uctl)
2960 		return -ENOMEM;
2961 
2962 	if ((err = snd_ac97_bus(trident->card, 0, &ops, NULL, &trident->ac97_bus)) < 0)
2963 		goto __out;
2964 
2965 	memset(&_ac97, 0, sizeof(_ac97));
2966 	_ac97.private_data = trident;
2967 	trident->ac97_detect = 1;
2968 
2969       __again:
2970 	if ((err = snd_ac97_mixer(trident->ac97_bus, &_ac97, &trident->ac97)) < 0) {
2971 		if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
2972 			if ((err = snd_trident_sis_reset(trident)) < 0)
2973 				goto __out;
2974 			if (retries-- > 0)
2975 				goto __again;
2976 			err = -EIO;
2977 		}
2978 		goto __out;
2979 	}
2980 
2981 	/* secondary codec? */
2982 	if (trident->device == TRIDENT_DEVICE_ID_SI7018 &&
2983 	    (inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) & SI_AC97_PRIMARY_READY) != 0) {
2984 		_ac97.num = 1;
2985 		err = snd_ac97_mixer(trident->ac97_bus, &_ac97, &trident->ac97_sec);
2986 		if (err < 0)
2987 			dev_err(trident->card->dev,
2988 				"SI7018: the secondary codec - invalid access\n");
2989 #if 0	// only for my testing purpose --jk
2990 		{
2991 			struct snd_ac97 *mc97;
2992 			err = snd_ac97_modem(trident->card, &_ac97, &mc97);
2993 			if (err < 0)
2994 				dev_err(trident->card->dev,
2995 					"snd_ac97_modem returned error %i\n", err);
2996 		}
2997 #endif
2998 	}
2999 
3000 	trident->ac97_detect = 0;
3001 
3002 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
3003 		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_trident_vol_wave_control, trident))) < 0)
3004 			goto __out;
3005 		kctl->put(kctl, uctl);
3006 		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_trident_vol_music_control, trident))) < 0)
3007 			goto __out;
3008 		kctl->put(kctl, uctl);
3009 		outl(trident->musicvol_wavevol = 0x00000000, TRID_REG(trident, T4D_MUSICVOL_WAVEVOL));
3010 	} else {
3011 		outl(trident->musicvol_wavevol = 0xffff0000, TRID_REG(trident, T4D_MUSICVOL_WAVEVOL));
3012 	}
3013 
3014 	for (idx = 0; idx < 32; idx++) {
3015 		struct snd_trident_pcm_mixer *tmix;
3016 
3017 		tmix = &trident->pcm_mixer[idx];
3018 		tmix->voice = NULL;
3019 	}
3020 	if ((trident->ctl_vol = snd_ctl_new1(&snd_trident_pcm_vol_control, trident)) == NULL)
3021 		goto __nomem;
3022 	if ((err = snd_ctl_add(card, trident->ctl_vol)))
3023 		goto __out;
3024 
3025 	if ((trident->ctl_pan = snd_ctl_new1(&snd_trident_pcm_pan_control, trident)) == NULL)
3026 		goto __nomem;
3027 	if ((err = snd_ctl_add(card, trident->ctl_pan)))
3028 		goto __out;
3029 
3030 	if ((trident->ctl_rvol = snd_ctl_new1(&snd_trident_pcm_rvol_control, trident)) == NULL)
3031 		goto __nomem;
3032 	if ((err = snd_ctl_add(card, trident->ctl_rvol)))
3033 		goto __out;
3034 
3035 	if ((trident->ctl_cvol = snd_ctl_new1(&snd_trident_pcm_cvol_control, trident)) == NULL)
3036 		goto __nomem;
3037 	if ((err = snd_ctl_add(card, trident->ctl_cvol)))
3038 		goto __out;
3039 
3040 	if (trident->device == TRIDENT_DEVICE_ID_NX) {
3041 		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_trident_ac97_rear_control, trident))) < 0)
3042 			goto __out;
3043 		kctl->put(kctl, uctl);
3044 	}
3045 	if (trident->device == TRIDENT_DEVICE_ID_NX || trident->device == TRIDENT_DEVICE_ID_SI7018) {
3046 
3047 		kctl = snd_ctl_new1(&snd_trident_spdif_control, trident);
3048 		if (kctl == NULL) {
3049 			err = -ENOMEM;
3050 			goto __out;
3051 		}
3052 		if (trident->ac97->ext_id & AC97_EI_SPDIF)
3053 			kctl->id.index++;
3054 		if (trident->ac97_sec && (trident->ac97_sec->ext_id & AC97_EI_SPDIF))
3055 			kctl->id.index++;
3056 		idx = kctl->id.index;
3057 		if ((err = snd_ctl_add(card, kctl)) < 0)
3058 			goto __out;
3059 		kctl->put(kctl, uctl);
3060 
3061 		kctl = snd_ctl_new1(&snd_trident_spdif_default, trident);
3062 		if (kctl == NULL) {
3063 			err = -ENOMEM;
3064 			goto __out;
3065 		}
3066 		kctl->id.index = idx;
3067 		kctl->id.device = pcm_spdif_device;
3068 		if ((err = snd_ctl_add(card, kctl)) < 0)
3069 			goto __out;
3070 
3071 		kctl = snd_ctl_new1(&snd_trident_spdif_mask, trident);
3072 		if (kctl == NULL) {
3073 			err = -ENOMEM;
3074 			goto __out;
3075 		}
3076 		kctl->id.index = idx;
3077 		kctl->id.device = pcm_spdif_device;
3078 		if ((err = snd_ctl_add(card, kctl)) < 0)
3079 			goto __out;
3080 
3081 		kctl = snd_ctl_new1(&snd_trident_spdif_stream, trident);
3082 		if (kctl == NULL) {
3083 			err = -ENOMEM;
3084 			goto __out;
3085 		}
3086 		kctl->id.index = idx;
3087 		kctl->id.device = pcm_spdif_device;
3088 		if ((err = snd_ctl_add(card, kctl)) < 0)
3089 			goto __out;
3090 		trident->spdif_pcm_ctl = kctl;
3091 	}
3092 
3093 	err = 0;
3094 	goto __out;
3095 
3096  __nomem:
3097 	err = -ENOMEM;
3098 
3099  __out:
3100 	kfree(uctl);
3101 
3102 	return err;
3103 }
3104 
3105 /*
3106  * gameport interface
3107  */
3108 
3109 #if IS_REACHABLE(CONFIG_GAMEPORT)
3110 
3111 static unsigned char snd_trident_gameport_read(struct gameport *gameport)
3112 {
3113 	struct snd_trident *chip = gameport_get_port_data(gameport);
3114 
3115 	if (snd_BUG_ON(!chip))
3116 		return 0;
3117 	return inb(TRID_REG(chip, GAMEPORT_LEGACY));
3118 }
3119 
3120 static void snd_trident_gameport_trigger(struct gameport *gameport)
3121 {
3122 	struct snd_trident *chip = gameport_get_port_data(gameport);
3123 
3124 	if (snd_BUG_ON(!chip))
3125 		return;
3126 	outb(0xff, TRID_REG(chip, GAMEPORT_LEGACY));
3127 }
3128 
3129 static int snd_trident_gameport_cooked_read(struct gameport *gameport, int *axes, int *buttons)
3130 {
3131 	struct snd_trident *chip = gameport_get_port_data(gameport);
3132 	int i;
3133 
3134 	if (snd_BUG_ON(!chip))
3135 		return 0;
3136 
3137 	*buttons = (~inb(TRID_REG(chip, GAMEPORT_LEGACY)) >> 4) & 0xf;
3138 
3139 	for (i = 0; i < 4; i++) {
3140 		axes[i] = inw(TRID_REG(chip, GAMEPORT_AXES + i * 2));
3141 		if (axes[i] == 0xffff) axes[i] = -1;
3142 	}
3143 
3144         return 0;
3145 }
3146 
3147 static int snd_trident_gameport_open(struct gameport *gameport, int mode)
3148 {
3149 	struct snd_trident *chip = gameport_get_port_data(gameport);
3150 
3151 	if (snd_BUG_ON(!chip))
3152 		return 0;
3153 
3154 	switch (mode) {
3155 		case GAMEPORT_MODE_COOKED:
3156 			outb(GAMEPORT_MODE_ADC, TRID_REG(chip, GAMEPORT_GCR));
3157 			msleep(20);
3158 			return 0;
3159 		case GAMEPORT_MODE_RAW:
3160 			outb(0, TRID_REG(chip, GAMEPORT_GCR));
3161 			return 0;
3162 		default:
3163 			return -1;
3164 	}
3165 }
3166 
3167 int snd_trident_create_gameport(struct snd_trident *chip)
3168 {
3169 	struct gameport *gp;
3170 
3171 	chip->gameport = gp = gameport_allocate_port();
3172 	if (!gp) {
3173 		dev_err(chip->card->dev,
3174 			"cannot allocate memory for gameport\n");
3175 		return -ENOMEM;
3176 	}
3177 
3178 	gameport_set_name(gp, "Trident 4DWave");
3179 	gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
3180 	gameport_set_dev_parent(gp, &chip->pci->dev);
3181 
3182 	gameport_set_port_data(gp, chip);
3183 	gp->fuzz = 64;
3184 	gp->read = snd_trident_gameport_read;
3185 	gp->trigger = snd_trident_gameport_trigger;
3186 	gp->cooked_read = snd_trident_gameport_cooked_read;
3187 	gp->open = snd_trident_gameport_open;
3188 
3189 	gameport_register_port(gp);
3190 
3191 	return 0;
3192 }
3193 
3194 static inline void snd_trident_free_gameport(struct snd_trident *chip)
3195 {
3196 	if (chip->gameport) {
3197 		gameport_unregister_port(chip->gameport);
3198 		chip->gameport = NULL;
3199 	}
3200 }
3201 #else
3202 int snd_trident_create_gameport(struct snd_trident *chip) { return -ENOSYS; }
3203 static inline void snd_trident_free_gameport(struct snd_trident *chip) { }
3204 #endif /* CONFIG_GAMEPORT */
3205 
3206 /*
3207  * delay for 1 tick
3208  */
3209 static inline void do_delay(struct snd_trident *chip)
3210 {
3211 	schedule_timeout_uninterruptible(1);
3212 }
3213 
3214 /*
3215  *  SiS reset routine
3216  */
3217 
3218 static int snd_trident_sis_reset(struct snd_trident *trident)
3219 {
3220 	unsigned long end_time;
3221 	unsigned int i;
3222 	int r;
3223 
3224 	r = trident->in_suspend ? 0 : 2;	/* count of retries */
3225       __si7018_retry:
3226 	pci_write_config_byte(trident->pci, 0x46, 0x04);	/* SOFTWARE RESET */
3227 	udelay(100);
3228 	pci_write_config_byte(trident->pci, 0x46, 0x00);
3229 	udelay(100);
3230 	/* disable AC97 GPIO interrupt */
3231 	outb(0x00, TRID_REG(trident, SI_AC97_GPIO));
3232 	/* initialize serial interface, force cold reset */
3233 	i = PCMOUT|SURROUT|CENTEROUT|LFEOUT|SECONDARY_ID|COLD_RESET;
3234 	outl(i, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
3235 	udelay(1000);
3236 	/* remove cold reset */
3237 	i &= ~COLD_RESET;
3238 	outl(i, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
3239 	udelay(2000);
3240 	/* wait, until the codec is ready */
3241 	end_time = (jiffies + (HZ * 3) / 4) + 1;
3242 	do {
3243 		if ((inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) & SI_AC97_PRIMARY_READY) != 0)
3244 			goto __si7018_ok;
3245 		do_delay(trident);
3246 	} while (time_after_eq(end_time, jiffies));
3247 	dev_err(trident->card->dev, "AC'97 codec ready error [0x%x]\n",
3248 		inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)));
3249 	if (r-- > 0) {
3250 		end_time = jiffies + HZ;
3251 		do {
3252 			do_delay(trident);
3253 		} while (time_after_eq(end_time, jiffies));
3254 		goto __si7018_retry;
3255 	}
3256       __si7018_ok:
3257 	/* wait for the second codec */
3258 	do {
3259 		if ((inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) & SI_AC97_SECONDARY_READY) != 0)
3260 			break;
3261 		do_delay(trident);
3262 	} while (time_after_eq(end_time, jiffies));
3263 	/* enable 64 channel mode */
3264 	outl(BANK_B_EN, TRID_REG(trident, T4D_LFO_GC_CIR));
3265 	return 0;
3266 }
3267 
3268 /*
3269  *  /proc interface
3270  */
3271 
3272 static void snd_trident_proc_read(struct snd_info_entry *entry,
3273 				  struct snd_info_buffer *buffer)
3274 {
3275 	struct snd_trident *trident = entry->private_data;
3276 	char *s;
3277 
3278 	switch (trident->device) {
3279 	case TRIDENT_DEVICE_ID_SI7018:
3280 		s = "SiS 7018 Audio";
3281 		break;
3282 	case TRIDENT_DEVICE_ID_DX:
3283 		s = "Trident 4DWave PCI DX";
3284 		break;
3285 	case TRIDENT_DEVICE_ID_NX:
3286 		s = "Trident 4DWave PCI NX";
3287 		break;
3288 	default:
3289 		s = "???";
3290 	}
3291 	snd_iprintf(buffer, "%s\n\n", s);
3292 	snd_iprintf(buffer, "Spurious IRQs    : %d\n", trident->spurious_irq_count);
3293 	snd_iprintf(buffer, "Spurious IRQ dlta: %d\n", trident->spurious_irq_max_delta);
3294 	if (trident->device == TRIDENT_DEVICE_ID_NX || trident->device == TRIDENT_DEVICE_ID_SI7018)
3295 		snd_iprintf(buffer, "IEC958 Mixer Out : %s\n", trident->spdif_ctrl == 0x28 ? "on" : "off");
3296 	if (trident->device == TRIDENT_DEVICE_ID_NX) {
3297 		snd_iprintf(buffer, "Rear Speakers    : %s\n", trident->ac97_ctrl & 0x00000010 ? "on" : "off");
3298 		if (trident->tlb.entries) {
3299 			snd_iprintf(buffer,"\nVirtual Memory\n");
3300 			snd_iprintf(buffer, "Memory Maximum : %d\n", trident->tlb.memhdr->size);
3301 			snd_iprintf(buffer, "Memory Used    : %d\n", trident->tlb.memhdr->used);
3302 			snd_iprintf(buffer, "Memory Free    : %d\n", snd_util_mem_avail(trident->tlb.memhdr));
3303 		}
3304 	}
3305 }
3306 
3307 static void snd_trident_proc_init(struct snd_trident *trident)
3308 {
3309 	const char *s = "trident";
3310 
3311 	if (trident->device == TRIDENT_DEVICE_ID_SI7018)
3312 		s = "sis7018";
3313 	snd_card_ro_proc_new(trident->card, s, trident, snd_trident_proc_read);
3314 }
3315 
3316 static int snd_trident_dev_free(struct snd_device *device)
3317 {
3318 	struct snd_trident *trident = device->device_data;
3319 	return snd_trident_free(trident);
3320 }
3321 
3322 /*---------------------------------------------------------------------------
3323    snd_trident_tlb_alloc
3324 
3325    Description: Allocate and set up the TLB page table on 4D NX.
3326 		Each entry has 4 bytes (physical PCI address).
3327 
3328    Parameters:  trident - pointer to target device class for 4DWave.
3329 
3330    Returns:     0 or negative error code
3331 
3332   ---------------------------------------------------------------------------*/
3333 
3334 static int snd_trident_tlb_alloc(struct snd_trident *trident)
3335 {
3336 	int i;
3337 
3338 	/* TLB array must be aligned to 16kB !!! so we allocate
3339 	   32kB region and correct offset when necessary */
3340 
3341 	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(trident->pci),
3342 				2 * SNDRV_TRIDENT_MAX_PAGES * 4, &trident->tlb.buffer) < 0) {
3343 		dev_err(trident->card->dev, "unable to allocate TLB buffer\n");
3344 		return -ENOMEM;
3345 	}
3346 	trident->tlb.entries = (__le32 *)ALIGN((unsigned long)trident->tlb.buffer.area, SNDRV_TRIDENT_MAX_PAGES * 4);
3347 	trident->tlb.entries_dmaaddr = ALIGN(trident->tlb.buffer.addr, SNDRV_TRIDENT_MAX_PAGES * 4);
3348 	/* allocate shadow TLB page table (virtual addresses) */
3349 	trident->tlb.shadow_entries =
3350 		vmalloc(array_size(SNDRV_TRIDENT_MAX_PAGES,
3351 				   sizeof(unsigned long)));
3352 	if (!trident->tlb.shadow_entries)
3353 		return -ENOMEM;
3354 
3355 	/* allocate and setup silent page and initialise TLB entries */
3356 	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(trident->pci),
3357 				SNDRV_TRIDENT_PAGE_SIZE, &trident->tlb.silent_page) < 0) {
3358 		dev_err(trident->card->dev, "unable to allocate silent page\n");
3359 		return -ENOMEM;
3360 	}
3361 	memset(trident->tlb.silent_page.area, 0, SNDRV_TRIDENT_PAGE_SIZE);
3362 	for (i = 0; i < SNDRV_TRIDENT_MAX_PAGES; i++) {
3363 		trident->tlb.entries[i] = cpu_to_le32(trident->tlb.silent_page.addr & ~(SNDRV_TRIDENT_PAGE_SIZE-1));
3364 		trident->tlb.shadow_entries[i] = (unsigned long)trident->tlb.silent_page.area;
3365 	}
3366 
3367 	/* use emu memory block manager code to manage tlb page allocation */
3368 	trident->tlb.memhdr = snd_util_memhdr_new(SNDRV_TRIDENT_PAGE_SIZE * SNDRV_TRIDENT_MAX_PAGES);
3369 	if (trident->tlb.memhdr == NULL)
3370 		return -ENOMEM;
3371 
3372 	trident->tlb.memhdr->block_extra_size = sizeof(struct snd_trident_memblk_arg);
3373 	return 0;
3374 }
3375 
3376 /*
3377  * initialize 4D DX chip
3378  */
3379 
3380 static void snd_trident_stop_all_voices(struct snd_trident *trident)
3381 {
3382 	outl(0xffffffff, TRID_REG(trident, T4D_STOP_A));
3383 	outl(0xffffffff, TRID_REG(trident, T4D_STOP_B));
3384 	outl(0, TRID_REG(trident, T4D_AINTEN_A));
3385 	outl(0, TRID_REG(trident, T4D_AINTEN_B));
3386 }
3387 
3388 static int snd_trident_4d_dx_init(struct snd_trident *trident)
3389 {
3390 	struct pci_dev *pci = trident->pci;
3391 	unsigned long end_time;
3392 
3393 	/* reset the legacy configuration and whole audio/wavetable block */
3394 	pci_write_config_dword(pci, 0x40, 0);	/* DDMA */
3395 	pci_write_config_byte(pci, 0x44, 0);	/* ports */
3396 	pci_write_config_byte(pci, 0x45, 0);	/* Legacy DMA */
3397 	pci_write_config_byte(pci, 0x46, 4); /* reset */
3398 	udelay(100);
3399 	pci_write_config_byte(pci, 0x46, 0); /* release reset */
3400 	udelay(100);
3401 
3402 	/* warm reset of the AC'97 codec */
3403 	outl(0x00000001, TRID_REG(trident, DX_ACR2_AC97_COM_STAT));
3404 	udelay(100);
3405 	outl(0x00000000, TRID_REG(trident, DX_ACR2_AC97_COM_STAT));
3406 	/* DAC on, disable SB IRQ and try to force ADC valid signal */
3407 	trident->ac97_ctrl = 0x0000004a;
3408 	outl(trident->ac97_ctrl, TRID_REG(trident, DX_ACR2_AC97_COM_STAT));
3409 	/* wait, until the codec is ready */
3410 	end_time = (jiffies + (HZ * 3) / 4) + 1;
3411 	do {
3412 		if ((inl(TRID_REG(trident, DX_ACR2_AC97_COM_STAT)) & 0x0010) != 0)
3413 			goto __dx_ok;
3414 		do_delay(trident);
3415 	} while (time_after_eq(end_time, jiffies));
3416 	dev_err(trident->card->dev, "AC'97 codec ready error\n");
3417 	return -EIO;
3418 
3419  __dx_ok:
3420 	snd_trident_stop_all_voices(trident);
3421 
3422 	return 0;
3423 }
3424 
3425 /*
3426  * initialize 4D NX chip
3427  */
3428 static int snd_trident_4d_nx_init(struct snd_trident *trident)
3429 {
3430 	struct pci_dev *pci = trident->pci;
3431 	unsigned long end_time;
3432 
3433 	/* reset the legacy configuration and whole audio/wavetable block */
3434 	pci_write_config_dword(pci, 0x40, 0);	/* DDMA */
3435 	pci_write_config_byte(pci, 0x44, 0);	/* ports */
3436 	pci_write_config_byte(pci, 0x45, 0);	/* Legacy DMA */
3437 
3438 	pci_write_config_byte(pci, 0x46, 1); /* reset */
3439 	udelay(100);
3440 	pci_write_config_byte(pci, 0x46, 0); /* release reset */
3441 	udelay(100);
3442 
3443 	/* warm reset of the AC'97 codec */
3444 	outl(0x00000001, TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
3445 	udelay(100);
3446 	outl(0x00000000, TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
3447 	/* wait, until the codec is ready */
3448 	end_time = (jiffies + (HZ * 3) / 4) + 1;
3449 	do {
3450 		if ((inl(TRID_REG(trident, NX_ACR0_AC97_COM_STAT)) & 0x0008) != 0)
3451 			goto __nx_ok;
3452 		do_delay(trident);
3453 	} while (time_after_eq(end_time, jiffies));
3454 	dev_err(trident->card->dev, "AC'97 codec ready error [0x%x]\n",
3455 		inl(TRID_REG(trident, NX_ACR0_AC97_COM_STAT)));
3456 	return -EIO;
3457 
3458  __nx_ok:
3459 	/* DAC on */
3460 	trident->ac97_ctrl = 0x00000002;
3461 	outl(trident->ac97_ctrl, TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
3462 	/* disable SB IRQ */
3463 	outl(NX_SB_IRQ_DISABLE, TRID_REG(trident, T4D_MISCINT));
3464 
3465 	snd_trident_stop_all_voices(trident);
3466 
3467 	if (trident->tlb.entries != NULL) {
3468 		unsigned int i;
3469 		/* enable virtual addressing via TLB */
3470 		i = trident->tlb.entries_dmaaddr;
3471 		i |= 0x00000001;
3472 		outl(i, TRID_REG(trident, NX_TLBC));
3473 	} else {
3474 		outl(0, TRID_REG(trident, NX_TLBC));
3475 	}
3476 	/* initialize S/PDIF */
3477 	outl(trident->spdif_bits, TRID_REG(trident, NX_SPCSTATUS));
3478 	outb(trident->spdif_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
3479 
3480 	return 0;
3481 }
3482 
3483 /*
3484  * initialize sis7018 chip
3485  */
3486 static int snd_trident_sis_init(struct snd_trident *trident)
3487 {
3488 	int err;
3489 
3490 	if ((err = snd_trident_sis_reset(trident)) < 0)
3491 		return err;
3492 
3493 	snd_trident_stop_all_voices(trident);
3494 
3495 	/* initialize S/PDIF */
3496 	outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
3497 
3498 	return 0;
3499 }
3500 
3501 /*---------------------------------------------------------------------------
3502    snd_trident_create
3503 
3504    Description: This routine will create the device specific class for
3505                 the 4DWave card. It will also perform basic initialization.
3506 
3507    Parameters:  card  - which card to create
3508                 pci   - interface to PCI bus resource info
3509                 dma1ptr - playback dma buffer
3510                 dma2ptr - capture dma buffer
3511                 irqptr  -  interrupt resource info
3512 
3513    Returns:     4DWave device class private data
3514 
3515   ---------------------------------------------------------------------------*/
3516 
3517 int snd_trident_create(struct snd_card *card,
3518 		       struct pci_dev *pci,
3519 		       int pcm_streams,
3520 		       int pcm_spdif_device,
3521 		       int max_wavetable_size,
3522 		       struct snd_trident ** rtrident)
3523 {
3524 	struct snd_trident *trident;
3525 	int i, err;
3526 	struct snd_trident_voice *voice;
3527 	struct snd_trident_pcm_mixer *tmix;
3528 	static struct snd_device_ops ops = {
3529 		.dev_free =	snd_trident_dev_free,
3530 	};
3531 
3532 	*rtrident = NULL;
3533 
3534 	/* enable PCI device */
3535 	if ((err = pci_enable_device(pci)) < 0)
3536 		return err;
3537 	/* check, if we can restrict PCI DMA transfers to 30 bits */
3538 	if (dma_set_mask(&pci->dev, DMA_BIT_MASK(30)) < 0 ||
3539 	    dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(30)) < 0) {
3540 		dev_err(card->dev,
3541 			"architecture does not support 30bit PCI busmaster DMA\n");
3542 		pci_disable_device(pci);
3543 		return -ENXIO;
3544 	}
3545 
3546 	trident = kzalloc(sizeof(*trident), GFP_KERNEL);
3547 	if (trident == NULL) {
3548 		pci_disable_device(pci);
3549 		return -ENOMEM;
3550 	}
3551 	trident->device = (pci->vendor << 16) | pci->device;
3552 	trident->card = card;
3553 	trident->pci = pci;
3554 	spin_lock_init(&trident->reg_lock);
3555 	spin_lock_init(&trident->event_lock);
3556 	spin_lock_init(&trident->voice_alloc);
3557 	if (pcm_streams < 1)
3558 		pcm_streams = 1;
3559 	if (pcm_streams > 32)
3560 		pcm_streams = 32;
3561 	trident->ChanPCM = pcm_streams;
3562 	if (max_wavetable_size < 0 )
3563 		max_wavetable_size = 0;
3564 	trident->synth.max_size = max_wavetable_size * 1024;
3565 	trident->irq = -1;
3566 
3567 	trident->midi_port = TRID_REG(trident, T4D_MPU401_BASE);
3568 	pci_set_master(pci);
3569 
3570 	if ((err = pci_request_regions(pci, "Trident Audio")) < 0) {
3571 		kfree(trident);
3572 		pci_disable_device(pci);
3573 		return err;
3574 	}
3575 	trident->port = pci_resource_start(pci, 0);
3576 
3577 	if (request_irq(pci->irq, snd_trident_interrupt, IRQF_SHARED,
3578 			KBUILD_MODNAME, trident)) {
3579 		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
3580 		snd_trident_free(trident);
3581 		return -EBUSY;
3582 	}
3583 	trident->irq = pci->irq;
3584 
3585 	/* allocate 16k-aligned TLB for NX cards */
3586 	trident->tlb.entries = NULL;
3587 	trident->tlb.buffer.area = NULL;
3588 	if (trident->device == TRIDENT_DEVICE_ID_NX) {
3589 		if ((err = snd_trident_tlb_alloc(trident)) < 0) {
3590 			snd_trident_free(trident);
3591 			return err;
3592 		}
3593 	}
3594 
3595 	trident->spdif_bits = trident->spdif_pcm_bits = SNDRV_PCM_DEFAULT_CON_SPDIF;
3596 
3597 	/* initialize chip */
3598 	switch (trident->device) {
3599 	case TRIDENT_DEVICE_ID_DX:
3600 		err = snd_trident_4d_dx_init(trident);
3601 		break;
3602 	case TRIDENT_DEVICE_ID_NX:
3603 		err = snd_trident_4d_nx_init(trident);
3604 		break;
3605 	case TRIDENT_DEVICE_ID_SI7018:
3606 		err = snd_trident_sis_init(trident);
3607 		break;
3608 	default:
3609 		snd_BUG();
3610 		break;
3611 	}
3612 	if (err < 0) {
3613 		snd_trident_free(trident);
3614 		return err;
3615 	}
3616 
3617 	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, trident, &ops)) < 0) {
3618 		snd_trident_free(trident);
3619 		return err;
3620 	}
3621 
3622 	if ((err = snd_trident_mixer(trident, pcm_spdif_device)) < 0)
3623 		return err;
3624 
3625 	/* initialise synth voices */
3626 	for (i = 0; i < 64; i++) {
3627 		voice = &trident->synth.voices[i];
3628 		voice->number = i;
3629 		voice->trident = trident;
3630 	}
3631 	/* initialize pcm mixer entries */
3632 	for (i = 0; i < 32; i++) {
3633 		tmix = &trident->pcm_mixer[i];
3634 		tmix->vol = T4D_DEFAULT_PCM_VOL;
3635 		tmix->pan = T4D_DEFAULT_PCM_PAN;
3636 		tmix->rvol = T4D_DEFAULT_PCM_RVOL;
3637 		tmix->cvol = T4D_DEFAULT_PCM_CVOL;
3638 	}
3639 
3640 	snd_trident_enable_eso(trident);
3641 
3642 	snd_trident_proc_init(trident);
3643 	*rtrident = trident;
3644 	return 0;
3645 }
3646 
3647 /*---------------------------------------------------------------------------
3648    snd_trident_free
3649 
3650    Description: This routine will free the device specific class for
3651                 the 4DWave card.
3652 
3653    Parameters:  trident  - device specific private data for 4DWave card
3654 
3655    Returns:     None.
3656 
3657   ---------------------------------------------------------------------------*/
3658 
3659 static int snd_trident_free(struct snd_trident *trident)
3660 {
3661 	snd_trident_free_gameport(trident);
3662 	snd_trident_disable_eso(trident);
3663 	// Disable S/PDIF out
3664 	if (trident->device == TRIDENT_DEVICE_ID_NX)
3665 		outb(0x00, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
3666 	else if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
3667 		outl(0, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
3668 	}
3669 	if (trident->irq >= 0)
3670 		free_irq(trident->irq, trident);
3671 	if (trident->tlb.buffer.area) {
3672 		outl(0, TRID_REG(trident, NX_TLBC));
3673 		snd_util_memhdr_free(trident->tlb.memhdr);
3674 		if (trident->tlb.silent_page.area)
3675 			snd_dma_free_pages(&trident->tlb.silent_page);
3676 		vfree(trident->tlb.shadow_entries);
3677 		snd_dma_free_pages(&trident->tlb.buffer);
3678 	}
3679 	pci_release_regions(trident->pci);
3680 	pci_disable_device(trident->pci);
3681 	kfree(trident);
3682 	return 0;
3683 }
3684 
3685 /*---------------------------------------------------------------------------
3686    snd_trident_interrupt
3687 
3688    Description: ISR for Trident 4DWave device
3689 
3690    Parameters:  trident  - device specific private data for 4DWave card
3691 
3692    Problems:    It seems that Trident chips generates interrupts more than
3693                 one time in special cases. The spurious interrupts are
3694                 detected via sample timer (T4D_STIMER) and computing
3695                 corresponding delta value. The limits are detected with
3696                 the method try & fail so it is possible that it won't
3697                 work on all computers. [jaroslav]
3698 
3699    Returns:     None.
3700 
3701   ---------------------------------------------------------------------------*/
3702 
3703 static irqreturn_t snd_trident_interrupt(int irq, void *dev_id)
3704 {
3705 	struct snd_trident *trident = dev_id;
3706 	unsigned int audio_int, chn_int, stimer, channel, mask, tmp;
3707 	int delta;
3708 	struct snd_trident_voice *voice;
3709 
3710 	audio_int = inl(TRID_REG(trident, T4D_MISCINT));
3711 	if ((audio_int & (ADDRESS_IRQ|MPU401_IRQ)) == 0)
3712 		return IRQ_NONE;
3713 	if (audio_int & ADDRESS_IRQ) {
3714 		// get interrupt status for all channels
3715 		spin_lock(&trident->reg_lock);
3716 		stimer = inl(TRID_REG(trident, T4D_STIMER)) & 0x00ffffff;
3717 		chn_int = inl(TRID_REG(trident, T4D_AINT_A));
3718 		if (chn_int == 0)
3719 			goto __skip1;
3720 		outl(chn_int, TRID_REG(trident, T4D_AINT_A));	/* ack */
3721 	      __skip1:
3722 		chn_int = inl(TRID_REG(trident, T4D_AINT_B));
3723 		if (chn_int == 0)
3724 			goto __skip2;
3725 		for (channel = 63; channel >= 32; channel--) {
3726 			mask = 1 << (channel&0x1f);
3727 			if ((chn_int & mask) == 0)
3728 				continue;
3729 			voice = &trident->synth.voices[channel];
3730 			if (!voice->pcm || voice->substream == NULL) {
3731 				outl(mask, TRID_REG(trident, T4D_STOP_B));
3732 				continue;
3733 			}
3734 			delta = (int)stimer - (int)voice->stimer;
3735 			if (delta < 0)
3736 				delta = -delta;
3737 			if ((unsigned int)delta < voice->spurious_threshold) {
3738 				/* do some statistics here */
3739 				trident->spurious_irq_count++;
3740 				if (trident->spurious_irq_max_delta < (unsigned int)delta)
3741 					trident->spurious_irq_max_delta = delta;
3742 				continue;
3743 			}
3744 			voice->stimer = stimer;
3745 			if (voice->isync) {
3746 				if (!voice->isync3) {
3747 					tmp = inw(TRID_REG(trident, T4D_SBBL_SBCL));
3748 					if (trident->bDMAStart & 0x40)
3749 						tmp >>= 1;
3750 					if (tmp > 0)
3751 						tmp = voice->isync_max - tmp;
3752 				} else {
3753 					tmp = inl(TRID_REG(trident, NX_SPCTRL_SPCSO)) & 0x00ffffff;
3754 				}
3755 				if (tmp < voice->isync_mark) {
3756 					if (tmp > 0x10)
3757 						tmp = voice->isync_ESO - 7;
3758 					else
3759 						tmp = voice->isync_ESO + 2;
3760 					/* update ESO for IRQ voice to preserve sync */
3761 					snd_trident_stop_voice(trident, voice->number);
3762 					snd_trident_write_eso_reg(trident, voice, tmp);
3763 					snd_trident_start_voice(trident, voice->number);
3764 				}
3765 			} else if (voice->isync2) {
3766 				voice->isync2 = 0;
3767 				/* write original ESO and update CSO for IRQ voice to preserve sync */
3768 				snd_trident_stop_voice(trident, voice->number);
3769 				snd_trident_write_cso_reg(trident, voice, voice->isync_mark);
3770 				snd_trident_write_eso_reg(trident, voice, voice->ESO);
3771 				snd_trident_start_voice(trident, voice->number);
3772 			}
3773 #if 0
3774 			if (voice->extra) {
3775 				/* update CSO for extra voice to preserve sync */
3776 				snd_trident_stop_voice(trident, voice->extra->number);
3777 				snd_trident_write_cso_reg(trident, voice->extra, 0);
3778 				snd_trident_start_voice(trident, voice->extra->number);
3779 			}
3780 #endif
3781 			spin_unlock(&trident->reg_lock);
3782 			snd_pcm_period_elapsed(voice->substream);
3783 			spin_lock(&trident->reg_lock);
3784 		}
3785 		outl(chn_int, TRID_REG(trident, T4D_AINT_B));	/* ack */
3786 	      __skip2:
3787 		spin_unlock(&trident->reg_lock);
3788 	}
3789 	if (audio_int & MPU401_IRQ) {
3790 		if (trident->rmidi) {
3791 			snd_mpu401_uart_interrupt(irq, trident->rmidi->private_data);
3792 		} else {
3793 			inb(TRID_REG(trident, T4D_MPUR0));
3794 		}
3795 	}
3796 	// outl((ST_TARGET_REACHED | MIXER_OVERFLOW | MIXER_UNDERFLOW), TRID_REG(trident, T4D_MISCINT));
3797 	return IRQ_HANDLED;
3798 }
3799 
3800 struct snd_trident_voice *snd_trident_alloc_voice(struct snd_trident * trident, int type, int client, int port)
3801 {
3802 	struct snd_trident_voice *pvoice;
3803 	unsigned long flags;
3804 	int idx;
3805 
3806 	spin_lock_irqsave(&trident->voice_alloc, flags);
3807 	if (type == SNDRV_TRIDENT_VOICE_TYPE_PCM) {
3808 		idx = snd_trident_allocate_pcm_channel(trident);
3809 		if(idx < 0) {
3810 			spin_unlock_irqrestore(&trident->voice_alloc, flags);
3811 			return NULL;
3812 		}
3813 		pvoice = &trident->synth.voices[idx];
3814 		pvoice->use = 1;
3815 		pvoice->pcm = 1;
3816 		pvoice->capture = 0;
3817 		pvoice->spdif = 0;
3818 		pvoice->memblk = NULL;
3819 		pvoice->substream = NULL;
3820 		spin_unlock_irqrestore(&trident->voice_alloc, flags);
3821 		return pvoice;
3822 	}
3823 	if (type == SNDRV_TRIDENT_VOICE_TYPE_SYNTH) {
3824 		idx = snd_trident_allocate_synth_channel(trident);
3825 		if(idx < 0) {
3826 			spin_unlock_irqrestore(&trident->voice_alloc, flags);
3827 			return NULL;
3828 		}
3829 		pvoice = &trident->synth.voices[idx];
3830 		pvoice->use = 1;
3831 		pvoice->synth = 1;
3832 		pvoice->client = client;
3833 		pvoice->port = port;
3834 		pvoice->memblk = NULL;
3835 		spin_unlock_irqrestore(&trident->voice_alloc, flags);
3836 		return pvoice;
3837 	}
3838 	if (type == SNDRV_TRIDENT_VOICE_TYPE_MIDI) {
3839 	}
3840 	spin_unlock_irqrestore(&trident->voice_alloc, flags);
3841 	return NULL;
3842 }
3843 
3844 EXPORT_SYMBOL(snd_trident_alloc_voice);
3845 
3846 void snd_trident_free_voice(struct snd_trident * trident, struct snd_trident_voice *voice)
3847 {
3848 	unsigned long flags;
3849 	void (*private_free)(struct snd_trident_voice *);
3850 
3851 	if (voice == NULL || !voice->use)
3852 		return;
3853 	snd_trident_clear_voices(trident, voice->number, voice->number);
3854 	spin_lock_irqsave(&trident->voice_alloc, flags);
3855 	private_free = voice->private_free;
3856 	voice->private_free = NULL;
3857 	voice->private_data = NULL;
3858 	if (voice->pcm)
3859 		snd_trident_free_pcm_channel(trident, voice->number);
3860 	if (voice->synth)
3861 		snd_trident_free_synth_channel(trident, voice->number);
3862 	voice->use = voice->pcm = voice->synth = voice->midi = 0;
3863 	voice->capture = voice->spdif = 0;
3864 	voice->sample_ops = NULL;
3865 	voice->substream = NULL;
3866 	voice->extra = NULL;
3867 	spin_unlock_irqrestore(&trident->voice_alloc, flags);
3868 	if (private_free)
3869 		private_free(voice);
3870 }
3871 
3872 EXPORT_SYMBOL(snd_trident_free_voice);
3873 
3874 static void snd_trident_clear_voices(struct snd_trident * trident, unsigned short v_min, unsigned short v_max)
3875 {
3876 	unsigned int i, val, mask[2] = { 0, 0 };
3877 
3878 	if (snd_BUG_ON(v_min > 63 || v_max > 63))
3879 		return;
3880 	for (i = v_min; i <= v_max; i++)
3881 		mask[i >> 5] |= 1 << (i & 0x1f);
3882 	if (mask[0]) {
3883 		outl(mask[0], TRID_REG(trident, T4D_STOP_A));
3884 		val = inl(TRID_REG(trident, T4D_AINTEN_A));
3885 		outl(val & ~mask[0], TRID_REG(trident, T4D_AINTEN_A));
3886 	}
3887 	if (mask[1]) {
3888 		outl(mask[1], TRID_REG(trident, T4D_STOP_B));
3889 		val = inl(TRID_REG(trident, T4D_AINTEN_B));
3890 		outl(val & ~mask[1], TRID_REG(trident, T4D_AINTEN_B));
3891 	}
3892 }
3893 
3894 #ifdef CONFIG_PM_SLEEP
3895 static int snd_trident_suspend(struct device *dev)
3896 {
3897 	struct snd_card *card = dev_get_drvdata(dev);
3898 	struct snd_trident *trident = card->private_data;
3899 
3900 	trident->in_suspend = 1;
3901 	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
3902 	snd_ac97_suspend(trident->ac97);
3903 	snd_ac97_suspend(trident->ac97_sec);
3904 	return 0;
3905 }
3906 
3907 static int snd_trident_resume(struct device *dev)
3908 {
3909 	struct snd_card *card = dev_get_drvdata(dev);
3910 	struct snd_trident *trident = card->private_data;
3911 
3912 	switch (trident->device) {
3913 	case TRIDENT_DEVICE_ID_DX:
3914 		snd_trident_4d_dx_init(trident);
3915 		break;
3916 	case TRIDENT_DEVICE_ID_NX:
3917 		snd_trident_4d_nx_init(trident);
3918 		break;
3919 	case TRIDENT_DEVICE_ID_SI7018:
3920 		snd_trident_sis_init(trident);
3921 		break;
3922 	}
3923 
3924 	snd_ac97_resume(trident->ac97);
3925 	snd_ac97_resume(trident->ac97_sec);
3926 
3927 	/* restore some registers */
3928 	outl(trident->musicvol_wavevol, TRID_REG(trident, T4D_MUSICVOL_WAVEVOL));
3929 
3930 	snd_trident_enable_eso(trident);
3931 
3932 	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
3933 	trident->in_suspend = 0;
3934 	return 0;
3935 }
3936 
3937 SIMPLE_DEV_PM_OPS(snd_trident_pm, snd_trident_suspend, snd_trident_resume);
3938 #endif /* CONFIG_PM_SLEEP */
3939