xref: /linux/sound/pci/trident/trident_main.c (revision 54a8a2220c936a47840c9a3d74910c5a56fae2ed)
1 /*
2  *  Maintained by Jaroslav Kysela <perex@suse.cz>
3  *  Originated by audio@tridentmicro.com
4  *  Fri Feb 19 15:55:28 MST 1999
5  *  Routines for control of Trident 4DWave (DX and NX) chip
6  *
7  *  BUGS:
8  *
9  *  TODO:
10  *    ---
11  *
12  *   This program is free software; you can redistribute it and/or modify
13  *   it under the terms of the GNU General Public License as published by
14  *   the Free Software Foundation; either version 2 of the License, or
15  *   (at your option) any later version.
16  *
17  *   This program is distributed in the hope that it will be useful,
18  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
19  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  *   GNU General Public License for more details.
21  *
22  *   You should have received a copy of the GNU General Public License
23  *   along with this program; if not, write to the Free Software
24  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
25  *
26  *
27  *  SiS7018 S/PDIF support by Thomas Winischhofer <thomas@winischhofer.net>
28  */
29 
30 #include <sound/driver.h>
31 #include <linux/delay.h>
32 #include <linux/init.h>
33 #include <linux/interrupt.h>
34 #include <linux/pci.h>
35 #include <linux/slab.h>
36 #include <linux/vmalloc.h>
37 #include <linux/gameport.h>
38 
39 #include <sound/core.h>
40 #include <sound/info.h>
41 #include <sound/control.h>
42 #include <sound/trident.h>
43 #include <sound/asoundef.h>
44 
45 #include <asm/io.h>
46 
47 static int snd_trident_pcm_mixer_build(trident_t *trident, snd_trident_voice_t * voice, snd_pcm_substream_t *substream);
48 static int snd_trident_pcm_mixer_free(trident_t *trident, snd_trident_voice_t * voice, snd_pcm_substream_t *substream);
49 static irqreturn_t snd_trident_interrupt(int irq, void *dev_id, struct pt_regs *regs);
50 #ifdef CONFIG_PM
51 static int snd_trident_suspend(snd_card_t *card, pm_message_t state);
52 static int snd_trident_resume(snd_card_t *card);
53 #endif
54 static int snd_trident_sis_reset(trident_t *trident);
55 
56 static void snd_trident_clear_voices(trident_t * trident, unsigned short v_min, unsigned short v_max);
57 static int snd_trident_free(trident_t *trident);
58 
59 /*
60  *  common I/O routines
61  */
62 
63 
64 #if 0
65 static void snd_trident_print_voice_regs(trident_t *trident, int voice)
66 {
67 	unsigned int val, tmp;
68 
69 	printk("Trident voice %i:\n", voice);
70 	outb(voice, TRID_REG(trident, T4D_LFO_GC_CIR));
71 	val = inl(TRID_REG(trident, CH_LBA));
72 	printk("LBA: 0x%x\n", val);
73 	val = inl(TRID_REG(trident, CH_GVSEL_PAN_VOL_CTRL_EC));
74 	printk("GVSel: %i\n", val >> 31);
75 	printk("Pan: 0x%x\n", (val >> 24) & 0x7f);
76 	printk("Vol: 0x%x\n", (val >> 16) & 0xff);
77 	printk("CTRL: 0x%x\n", (val >> 12) & 0x0f);
78 	printk("EC: 0x%x\n", val & 0x0fff);
79 	if (trident->device != TRIDENT_DEVICE_ID_NX) {
80 		val = inl(TRID_REG(trident, CH_DX_CSO_ALPHA_FMS));
81 		printk("CSO: 0x%x\n", val >> 16);
82 		printk("Alpha: 0x%x\n", (val >> 4) & 0x0fff);
83 		printk("FMS: 0x%x\n", val & 0x0f);
84 		val = inl(TRID_REG(trident, CH_DX_ESO_DELTA));
85 		printk("ESO: 0x%x\n", val >> 16);
86 		printk("Delta: 0x%x\n", val & 0xffff);
87 		val = inl(TRID_REG(trident, CH_DX_FMC_RVOL_CVOL));
88 	} else {		// TRIDENT_DEVICE_ID_NX
89 		val = inl(TRID_REG(trident, CH_NX_DELTA_CSO));
90 		tmp = (val >> 24) & 0xff;
91 		printk("CSO: 0x%x\n", val & 0x00ffffff);
92 		val = inl(TRID_REG(trident, CH_NX_DELTA_ESO));
93 		tmp |= (val >> 16) & 0xff00;
94 		printk("Delta: 0x%x\n", tmp);
95 		printk("ESO: 0x%x\n", val & 0x00ffffff);
96 		val = inl(TRID_REG(trident, CH_NX_ALPHA_FMS_FMC_RVOL_CVOL));
97 		printk("Alpha: 0x%x\n", val >> 20);
98 		printk("FMS: 0x%x\n", (val >> 16) & 0x0f);
99 	}
100 	printk("FMC: 0x%x\n", (val >> 14) & 3);
101 	printk("RVol: 0x%x\n", (val >> 7) & 0x7f);
102 	printk("CVol: 0x%x\n", val & 0x7f);
103 }
104 #endif
105 
106 /*---------------------------------------------------------------------------
107    unsigned short snd_trident_codec_read(ac97_t *ac97, unsigned short reg)
108 
109    Description: This routine will do all of the reading from the external
110                 CODEC (AC97).
111 
112    Parameters:  ac97 - ac97 codec structure
113                 reg - CODEC register index, from AC97 Hal.
114 
115    returns:     16 bit value read from the AC97.
116 
117   ---------------------------------------------------------------------------*/
118 static unsigned short snd_trident_codec_read(ac97_t *ac97, unsigned short reg)
119 {
120 	unsigned int data = 0, treg;
121 	unsigned short count = 0xffff;
122 	unsigned long flags;
123 	trident_t *trident = ac97->private_data;
124 
125 	spin_lock_irqsave(&trident->reg_lock, flags);
126 	if (trident->device == TRIDENT_DEVICE_ID_DX) {
127 		data = (DX_AC97_BUSY_READ | (reg & 0x000000ff));
128 		outl(data, TRID_REG(trident, DX_ACR1_AC97_R));
129 		do {
130 			data = inl(TRID_REG(trident, DX_ACR1_AC97_R));
131 			if ((data & DX_AC97_BUSY_READ) == 0)
132 				break;
133 		} while (--count);
134 	} else if (trident->device == TRIDENT_DEVICE_ID_NX) {
135 		data = (NX_AC97_BUSY_READ | (reg & 0x000000ff));
136 		treg = ac97->num == 0 ? NX_ACR2_AC97_R_PRIMARY : NX_ACR3_AC97_R_SECONDARY;
137 		outl(data, TRID_REG(trident, treg));
138 		do {
139 			data = inl(TRID_REG(trident, treg));
140 			if ((data & 0x00000C00) == 0)
141 				break;
142 		} while (--count);
143 	} else if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
144 		data = SI_AC97_BUSY_READ | SI_AC97_AUDIO_BUSY | (reg & 0x000000ff);
145 		if (ac97->num == 1)
146 			data |= SI_AC97_SECONDARY;
147 		outl(data, TRID_REG(trident, SI_AC97_READ));
148 		do {
149 			data = inl(TRID_REG(trident, SI_AC97_READ));
150 			if ((data & (SI_AC97_BUSY_READ)) == 0)
151 				break;
152 		} while (--count);
153 	}
154 
155 	if (count == 0 && !trident->ac97_detect) {
156 		snd_printk("ac97 codec read TIMEOUT [0x%x/0x%x]!!!\n", reg, data);
157 		data = 0;
158 	}
159 
160 	spin_unlock_irqrestore(&trident->reg_lock, flags);
161 	return ((unsigned short) (data >> 16));
162 }
163 
164 /*---------------------------------------------------------------------------
165    void snd_trident_codec_write(ac97_t *ac97, unsigned short reg, unsigned short wdata)
166 
167    Description: This routine will do all of the writing to the external
168                 CODEC (AC97).
169 
170    Parameters:	ac97 - ac97 codec structure
171    	        reg - CODEC register index, from AC97 Hal.
172                 data  - Lower 16 bits are the data to write to CODEC.
173 
174    returns:     TRUE if everything went ok, else FALSE.
175 
176   ---------------------------------------------------------------------------*/
177 static void snd_trident_codec_write(ac97_t *ac97, unsigned short reg, unsigned short wdata)
178 {
179 	unsigned int address, data;
180 	unsigned short count = 0xffff;
181 	unsigned long flags;
182 	trident_t *trident = ac97->private_data;
183 
184 	data = ((unsigned long) wdata) << 16;
185 
186 	spin_lock_irqsave(&trident->reg_lock, flags);
187 	if (trident->device == TRIDENT_DEVICE_ID_DX) {
188 		address = DX_ACR0_AC97_W;
189 
190 		/* read AC-97 write register status */
191 		do {
192 			if ((inw(TRID_REG(trident, address)) & DX_AC97_BUSY_WRITE) == 0)
193 				break;
194 		} while (--count);
195 
196 		data |= (DX_AC97_BUSY_WRITE | (reg & 0x000000ff));
197 	} else if (trident->device == TRIDENT_DEVICE_ID_NX) {
198 		address = NX_ACR1_AC97_W;
199 
200 		/* read AC-97 write register status */
201 		do {
202 			if ((inw(TRID_REG(trident, address)) & NX_AC97_BUSY_WRITE) == 0)
203 				break;
204 		} while (--count);
205 
206 		data |= (NX_AC97_BUSY_WRITE | (ac97->num << 8) | (reg & 0x000000ff));
207 	} else if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
208 		address = SI_AC97_WRITE;
209 
210 		/* read AC-97 write register status */
211 		do {
212 			if ((inw(TRID_REG(trident, address)) & (SI_AC97_BUSY_WRITE)) == 0)
213 				break;
214 		} while (--count);
215 
216 		data |= SI_AC97_BUSY_WRITE | SI_AC97_AUDIO_BUSY | (reg & 0x000000ff);
217 		if (ac97->num == 1)
218 			data |= SI_AC97_SECONDARY;
219 	} else {
220 		address = 0;	/* keep GCC happy */
221 		count = 0;	/* return */
222 	}
223 
224 	if (count == 0) {
225 		spin_unlock_irqrestore(&trident->reg_lock, flags);
226 		return;
227 	}
228 	outl(data, TRID_REG(trident, address));
229 	spin_unlock_irqrestore(&trident->reg_lock, flags);
230 }
231 
232 /*---------------------------------------------------------------------------
233    void snd_trident_enable_eso(trident_t *trident)
234 
235    Description: This routine will enable end of loop interrupts.
236                 End of loop interrupts will occur when a running
237                 channel reaches ESO.
238                 Also enables middle of loop interrupts.
239 
240    Parameters:  trident - pointer to target device class for 4DWave.
241 
242   ---------------------------------------------------------------------------*/
243 
244 static void snd_trident_enable_eso(trident_t * trident)
245 {
246 	unsigned int val;
247 
248 	val = inl(TRID_REG(trident, T4D_LFO_GC_CIR));
249 	val |= ENDLP_IE;
250 	val |= MIDLP_IE;
251 	if (trident->device == TRIDENT_DEVICE_ID_SI7018)
252 		val |= BANK_B_EN;
253 	outl(val, TRID_REG(trident, T4D_LFO_GC_CIR));
254 }
255 
256 /*---------------------------------------------------------------------------
257    void snd_trident_disable_eso(trident_t *trident)
258 
259    Description: This routine will disable end of loop interrupts.
260                 End of loop interrupts will occur when a running
261                 channel reaches ESO.
262                 Also disables middle of loop interrupts.
263 
264    Parameters:
265                 trident - pointer to target device class for 4DWave.
266 
267    returns:     TRUE if everything went ok, else FALSE.
268 
269   ---------------------------------------------------------------------------*/
270 
271 static void snd_trident_disable_eso(trident_t * trident)
272 {
273 	unsigned int tmp;
274 
275 	tmp = inl(TRID_REG(trident, T4D_LFO_GC_CIR));
276 	tmp &= ~ENDLP_IE;
277 	tmp &= ~MIDLP_IE;
278 	outl(tmp, TRID_REG(trident, T4D_LFO_GC_CIR));
279 }
280 
281 /*---------------------------------------------------------------------------
282    void snd_trident_start_voice(trident_t * trident, unsigned int voice)
283 
284     Description: Start a voice, any channel 0 thru 63.
285                  This routine automatically handles the fact that there are
286                  more than 32 channels available.
287 
288     Parameters : voice - Voice number 0 thru n.
289                  trident - pointer to target device class for 4DWave.
290 
291     Return Value: None.
292 
293   ---------------------------------------------------------------------------*/
294 
295 void snd_trident_start_voice(trident_t * trident, unsigned int voice)
296 {
297 	unsigned int mask = 1 << (voice & 0x1f);
298 	unsigned int reg = (voice & 0x20) ? T4D_START_B : T4D_START_A;
299 
300 	outl(mask, TRID_REG(trident, reg));
301 }
302 
303 /*---------------------------------------------------------------------------
304    void snd_trident_stop_voice(trident_t * trident, unsigned int voice)
305 
306     Description: Stop a voice, any channel 0 thru 63.
307                  This routine automatically handles the fact that there are
308                  more than 32 channels available.
309 
310     Parameters : voice - Voice number 0 thru n.
311                  trident - pointer to target device class for 4DWave.
312 
313     Return Value: None.
314 
315   ---------------------------------------------------------------------------*/
316 
317 void snd_trident_stop_voice(trident_t * trident, unsigned int voice)
318 {
319 	unsigned int mask = 1 << (voice & 0x1f);
320 	unsigned int reg = (voice & 0x20) ? T4D_STOP_B : T4D_STOP_A;
321 
322 	outl(mask, TRID_REG(trident, reg));
323 }
324 
325 /*---------------------------------------------------------------------------
326     int snd_trident_allocate_pcm_channel(trident_t *trident)
327 
328     Description: Allocate hardware channel in Bank B (32-63).
329 
330     Parameters :  trident - pointer to target device class for 4DWave.
331 
332     Return Value: hardware channel - 32-63 or -1 when no channel is available
333 
334   ---------------------------------------------------------------------------*/
335 
336 static int snd_trident_allocate_pcm_channel(trident_t * trident)
337 {
338 	int idx;
339 
340 	if (trident->ChanPCMcnt >= trident->ChanPCM)
341 		return -1;
342 	for (idx = 31; idx >= 0; idx--) {
343 		if (!(trident->ChanMap[T4D_BANK_B] & (1 << idx))) {
344 			trident->ChanMap[T4D_BANK_B] |= 1 << idx;
345 			trident->ChanPCMcnt++;
346 			return idx + 32;
347 		}
348 	}
349 	return -1;
350 }
351 
352 /*---------------------------------------------------------------------------
353     void snd_trident_free_pcm_channel(int channel)
354 
355     Description: Free hardware channel in Bank B (32-63)
356 
357     Parameters :  trident - pointer to target device class for 4DWave.
358 	          channel - hardware channel number 0-63
359 
360     Return Value: none
361 
362   ---------------------------------------------------------------------------*/
363 
364 static void snd_trident_free_pcm_channel(trident_t *trident, int channel)
365 {
366 	if (channel < 32 || channel > 63)
367 		return;
368 	channel &= 0x1f;
369 	if (trident->ChanMap[T4D_BANK_B] & (1 << channel)) {
370 		trident->ChanMap[T4D_BANK_B] &= ~(1 << channel);
371 		trident->ChanPCMcnt--;
372 	}
373 }
374 
375 /*---------------------------------------------------------------------------
376     unsigned int snd_trident_allocate_synth_channel(void)
377 
378     Description: Allocate hardware channel in Bank A (0-31).
379 
380     Parameters :  trident - pointer to target device class for 4DWave.
381 
382     Return Value: hardware channel - 0-31 or -1 when no channel is available
383 
384   ---------------------------------------------------------------------------*/
385 
386 static int snd_trident_allocate_synth_channel(trident_t * trident)
387 {
388 	int idx;
389 
390 	for (idx = 31; idx >= 0; idx--) {
391 		if (!(trident->ChanMap[T4D_BANK_A] & (1 << idx))) {
392 			trident->ChanMap[T4D_BANK_A] |= 1 << idx;
393 			trident->synth.ChanSynthCount++;
394 			return idx;
395 		}
396 	}
397 	return -1;
398 }
399 
400 /*---------------------------------------------------------------------------
401     void snd_trident_free_synth_channel( int channel )
402 
403     Description: Free hardware channel in Bank B (0-31).
404 
405     Parameters :  trident - pointer to target device class for 4DWave.
406 	          channel - hardware channel number 0-63
407 
408     Return Value: none
409 
410   ---------------------------------------------------------------------------*/
411 
412 static void snd_trident_free_synth_channel(trident_t *trident, int channel)
413 {
414 	if (channel < 0 || channel > 31)
415 		return;
416 	channel &= 0x1f;
417 	if (trident->ChanMap[T4D_BANK_A] & (1 << channel)) {
418 		trident->ChanMap[T4D_BANK_A] &= ~(1 << channel);
419 		trident->synth.ChanSynthCount--;
420 	}
421 }
422 
423 /*---------------------------------------------------------------------------
424    snd_trident_write_voice_regs
425 
426    Description: This routine will complete and write the 5 hardware channel
427                 registers to hardware.
428 
429    Paramters:   trident - pointer to target device class for 4DWave.
430                 voice - synthesizer voice structure
431                 Each register field.
432 
433   ---------------------------------------------------------------------------*/
434 
435 void snd_trident_write_voice_regs(trident_t * trident,
436 				  snd_trident_voice_t * voice)
437 {
438 	unsigned int FmcRvolCvol;
439 	unsigned int regs[5];
440 
441 	regs[1] = voice->LBA;
442 	regs[4] = (voice->GVSel << 31) |
443 		  ((voice->Pan & 0x0000007f) << 24) |
444 		  ((voice->CTRL & 0x0000000f) << 12);
445 	FmcRvolCvol = ((voice->FMC & 3) << 14) |
446 	              ((voice->RVol & 0x7f) << 7) |
447 	              (voice->CVol & 0x7f);
448 
449 	switch (trident->device) {
450 	case TRIDENT_DEVICE_ID_SI7018:
451 		regs[4] |= voice->number > 31 ?
452 				(voice->Vol & 0x000003ff) :
453 				((voice->Vol & 0x00003fc) << (16-2)) |
454 				(voice->EC & 0x00000fff);
455 		regs[0] = (voice->CSO << 16) | ((voice->Alpha & 0x00000fff) << 4) | (voice->FMS & 0x0000000f);
456 		regs[2] = (voice->ESO << 16) | (voice->Delta & 0x0ffff);
457 		regs[3] = (voice->Attribute << 16) | FmcRvolCvol;
458 		break;
459 	case TRIDENT_DEVICE_ID_DX:
460 		regs[4] |= ((voice->Vol & 0x000003fc) << (16-2)) |
461 			   (voice->EC & 0x00000fff);
462 		regs[0] = (voice->CSO << 16) | ((voice->Alpha & 0x00000fff) << 4) | (voice->FMS & 0x0000000f);
463 		regs[2] = (voice->ESO << 16) | (voice->Delta & 0x0ffff);
464 		regs[3] = FmcRvolCvol;
465 		break;
466 	case TRIDENT_DEVICE_ID_NX:
467 		regs[4] |= ((voice->Vol & 0x000003fc) << (16-2)) |
468 			   (voice->EC & 0x00000fff);
469 		regs[0] = (voice->Delta << 24) | (voice->CSO & 0x00ffffff);
470 		regs[2] = ((voice->Delta << 16) & 0xff000000) | (voice->ESO & 0x00ffffff);
471 		regs[3] = (voice->Alpha << 20) | ((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 	printk("written %i channel:\n", voice->number);
487 	printk("  regs[0] = 0x%x/0x%x\n", regs[0], inl(TRID_REG(trident, CH_START + 0)));
488 	printk("  regs[1] = 0x%x/0x%x\n", regs[1], inl(TRID_REG(trident, CH_START + 4)));
489 	printk("  regs[2] = 0x%x/0x%x\n", regs[2], inl(TRID_REG(trident, CH_START + 8)));
490 	printk("  regs[3] = 0x%x/0x%x\n", regs[3], inl(TRID_REG(trident, CH_START + 12)));
491 	printk("  regs[4] = 0x%x/0x%x\n", regs[4], inl(TRID_REG(trident, CH_START + 16)));
492 #endif
493 }
494 
495 /*---------------------------------------------------------------------------
496    snd_trident_write_cso_reg
497 
498    Description: This routine will write the new CSO offset
499                 register to hardware.
500 
501    Paramters:   trident - pointer to target device class for 4DWave.
502                 voice - synthesizer voice structure
503                 CSO - new CSO value
504 
505   ---------------------------------------------------------------------------*/
506 
507 static void snd_trident_write_cso_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int CSO)
508 {
509 	voice->CSO = CSO;
510 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
511 	if (trident->device != TRIDENT_DEVICE_ID_NX) {
512 		outw(voice->CSO, TRID_REG(trident, CH_DX_CSO_ALPHA_FMS) + 2);
513 	} else {
514 		outl((voice->Delta << 24) | (voice->CSO & 0x00ffffff), TRID_REG(trident, CH_NX_DELTA_CSO));
515 	}
516 }
517 
518 /*---------------------------------------------------------------------------
519    snd_trident_write_eso_reg
520 
521    Description: This routine will write the new ESO offset
522                 register to hardware.
523 
524    Paramters:   trident - pointer to target device class for 4DWave.
525                 voice - synthesizer voice structure
526                 ESO - new ESO value
527 
528   ---------------------------------------------------------------------------*/
529 
530 static void snd_trident_write_eso_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int ESO)
531 {
532 	voice->ESO = ESO;
533 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
534 	if (trident->device != TRIDENT_DEVICE_ID_NX) {
535 		outw(voice->ESO, TRID_REG(trident, CH_DX_ESO_DELTA) + 2);
536 	} else {
537 		outl(((voice->Delta << 16) & 0xff000000) | (voice->ESO & 0x00ffffff), TRID_REG(trident, CH_NX_DELTA_ESO));
538 	}
539 }
540 
541 /*---------------------------------------------------------------------------
542    snd_trident_write_vol_reg
543 
544    Description: This routine will write the new voice volume
545                 register to hardware.
546 
547    Paramters:   trident - pointer to target device class for 4DWave.
548                 voice - synthesizer voice structure
549                 Vol - new voice volume
550 
551   ---------------------------------------------------------------------------*/
552 
553 static void snd_trident_write_vol_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int Vol)
554 {
555 	voice->Vol = Vol;
556 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
557 	switch (trident->device) {
558 	case TRIDENT_DEVICE_ID_DX:
559 	case TRIDENT_DEVICE_ID_NX:
560 		outb(voice->Vol >> 2, TRID_REG(trident, CH_GVSEL_PAN_VOL_CTRL_EC + 2));
561 		break;
562 	case TRIDENT_DEVICE_ID_SI7018:
563 		// printk("voice->Vol = 0x%x\n", voice->Vol);
564 		outw((voice->CTRL << 12) | voice->Vol, TRID_REG(trident, CH_GVSEL_PAN_VOL_CTRL_EC));
565 		break;
566 	}
567 }
568 
569 /*---------------------------------------------------------------------------
570    snd_trident_write_pan_reg
571 
572    Description: This routine will write the new voice pan
573                 register to hardware.
574 
575    Paramters:   trident - pointer to target device class for 4DWave.
576                 voice - synthesizer voice structure
577                 Pan - new pan value
578 
579   ---------------------------------------------------------------------------*/
580 
581 static void snd_trident_write_pan_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int Pan)
582 {
583 	voice->Pan = Pan;
584 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
585 	outb(((voice->GVSel & 0x01) << 7) | (voice->Pan & 0x7f), TRID_REG(trident, CH_GVSEL_PAN_VOL_CTRL_EC + 3));
586 }
587 
588 /*---------------------------------------------------------------------------
589    snd_trident_write_rvol_reg
590 
591    Description: This routine will write the new reverb volume
592                 register to hardware.
593 
594    Paramters:   trident - pointer to target device class for 4DWave.
595                 voice - synthesizer voice structure
596                 RVol - new reverb volume
597 
598   ---------------------------------------------------------------------------*/
599 
600 static void snd_trident_write_rvol_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int RVol)
601 {
602 	voice->RVol = RVol;
603 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
604 	outw(((voice->FMC & 0x0003) << 14) | ((voice->RVol & 0x007f) << 7) | (voice->CVol & 0x007f),
605 	     TRID_REG(trident, trident->device == TRIDENT_DEVICE_ID_NX ? CH_NX_ALPHA_FMS_FMC_RVOL_CVOL : CH_DX_FMC_RVOL_CVOL));
606 }
607 
608 /*---------------------------------------------------------------------------
609    snd_trident_write_cvol_reg
610 
611    Description: This routine will write the new chorus volume
612                 register to hardware.
613 
614    Paramters:   trident - pointer to target device class for 4DWave.
615                 voice - synthesizer voice structure
616                 CVol - new chorus volume
617 
618   ---------------------------------------------------------------------------*/
619 
620 static void snd_trident_write_cvol_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int CVol)
621 {
622 	voice->CVol = CVol;
623 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
624 	outw(((voice->FMC & 0x0003) << 14) | ((voice->RVol & 0x007f) << 7) | (voice->CVol & 0x007f),
625 	     TRID_REG(trident, trident->device == TRIDENT_DEVICE_ID_NX ? CH_NX_ALPHA_FMS_FMC_RVOL_CVOL : CH_DX_FMC_RVOL_CVOL));
626 }
627 
628 /*---------------------------------------------------------------------------
629    snd_trident_convert_rate
630 
631    Description: This routine converts rate in HZ to hardware delta value.
632 
633    Paramters:   trident - pointer to target device class for 4DWave.
634                 rate - Real or Virtual channel number.
635 
636    Returns:     Delta value.
637 
638   ---------------------------------------------------------------------------*/
639 static unsigned int snd_trident_convert_rate(unsigned int rate)
640 {
641 	unsigned int delta;
642 
643 	// We special case 44100 and 8000 since rounding with the equation
644 	// does not give us an accurate enough value. For 11025 and 22050
645 	// the equation gives us the best answer. All other frequencies will
646 	// also use the equation. JDW
647 	if (rate == 44100)
648 		delta = 0xeb3;
649 	else if (rate == 8000)
650 		delta = 0x2ab;
651 	else if (rate == 48000)
652 		delta = 0x1000;
653 	else
654 		delta = (((rate << 12) + 24000) / 48000) & 0x0000ffff;
655 	return delta;
656 }
657 
658 /*---------------------------------------------------------------------------
659    snd_trident_convert_adc_rate
660 
661    Description: This routine converts rate in HZ to hardware delta value.
662 
663    Paramters:   trident - pointer to target device class for 4DWave.
664                 rate - Real or Virtual channel number.
665 
666    Returns:     Delta value.
667 
668   ---------------------------------------------------------------------------*/
669 static unsigned int snd_trident_convert_adc_rate(unsigned int rate)
670 {
671 	unsigned int delta;
672 
673 	// We special case 44100 and 8000 since rounding with the equation
674 	// does not give us an accurate enough value. For 11025 and 22050
675 	// the equation gives us the best answer. All other frequencies will
676 	// also use the equation. JDW
677 	if (rate == 44100)
678 		delta = 0x116a;
679 	else if (rate == 8000)
680 		delta = 0x6000;
681 	else if (rate == 48000)
682 		delta = 0x1000;
683 	else
684 		delta = ((48000 << 12) / rate) & 0x0000ffff;
685 	return delta;
686 }
687 
688 /*---------------------------------------------------------------------------
689    snd_trident_spurious_threshold
690 
691    Description: This routine converts rate in HZ to spurious threshold.
692 
693    Paramters:   trident - pointer to target device class for 4DWave.
694                 rate - Real or Virtual channel number.
695 
696    Returns:     Delta value.
697 
698   ---------------------------------------------------------------------------*/
699 static unsigned int snd_trident_spurious_threshold(unsigned int rate, unsigned int period_size)
700 {
701 	unsigned int res = (rate * period_size) / 48000;
702 	if (res < 64)
703 		res = res / 2;
704 	else
705 		res -= 32;
706 	return res;
707 }
708 
709 /*---------------------------------------------------------------------------
710    snd_trident_control_mode
711 
712    Description: This routine returns a control mode for a PCM channel.
713 
714    Paramters:   trident - pointer to target device class for 4DWave.
715                 substream  - PCM substream
716 
717    Returns:     Control value.
718 
719   ---------------------------------------------------------------------------*/
720 static unsigned int snd_trident_control_mode(snd_pcm_substream_t *substream)
721 {
722 	unsigned int CTRL;
723 	snd_pcm_runtime_t *runtime = substream->runtime;
724 
725 	/* set ctrl mode
726 	   CTRL default: 8-bit (unsigned) mono, loop mode enabled
727 	 */
728 	CTRL = 0x00000001;
729 	if (snd_pcm_format_width(runtime->format) == 16)
730 		CTRL |= 0x00000008;	// 16-bit data
731 	if (snd_pcm_format_signed(runtime->format))
732 		CTRL |= 0x00000002;	// signed data
733 	if (runtime->channels > 1)
734 		CTRL |= 0x00000004;	// stereo data
735 	return CTRL;
736 }
737 
738 /*
739  *  PCM part
740  */
741 
742 /*---------------------------------------------------------------------------
743    snd_trident_ioctl
744 
745    Description: Device I/O control handler for playback/capture parameters.
746 
747    Paramters:   substream  - PCM substream class
748                 cmd     - what ioctl message to process
749                 arg     - additional message infoarg
750 
751    Returns:     Error status
752 
753   ---------------------------------------------------------------------------*/
754 
755 static int snd_trident_ioctl(snd_pcm_substream_t * substream,
756 			     unsigned int cmd,
757 			     void *arg)
758 {
759 	/* FIXME: it seems that with small periods the behaviour of
760 	          trident hardware is unpredictable and interrupt generator
761 	          is broken */
762 	return snd_pcm_lib_ioctl(substream, cmd, arg);
763 }
764 
765 /*---------------------------------------------------------------------------
766    snd_trident_allocate_pcm_mem
767 
768    Description: Allocate PCM ring buffer for given substream
769 
770    Parameters:  substream  - PCM substream class
771 		hw_params  - hardware parameters
772 
773    Returns:     Error status
774 
775   ---------------------------------------------------------------------------*/
776 
777 static int snd_trident_allocate_pcm_mem(snd_pcm_substream_t * substream,
778 					snd_pcm_hw_params_t * hw_params)
779 {
780 	trident_t *trident = snd_pcm_substream_chip(substream);
781 	snd_pcm_runtime_t *runtime = substream->runtime;
782 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
783 	int err;
784 
785 	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
786 		return err;
787 	if (trident->tlb.entries) {
788 		if (err > 0) { /* change */
789 			if (voice->memblk)
790 				snd_trident_free_pages(trident, voice->memblk);
791 			voice->memblk = snd_trident_alloc_pages(trident, substream);
792 			if (voice->memblk == NULL)
793 				return -ENOMEM;
794 		}
795 	}
796 	return 0;
797 }
798 
799 /*---------------------------------------------------------------------------
800    snd_trident_allocate_evoice
801 
802    Description: Allocate extra voice as interrupt generator
803 
804    Parameters:  substream  - PCM substream class
805 		hw_params  - hardware parameters
806 
807    Returns:     Error status
808 
809   ---------------------------------------------------------------------------*/
810 
811 static int snd_trident_allocate_evoice(snd_pcm_substream_t * substream,
812 				       snd_pcm_hw_params_t * hw_params)
813 {
814 	trident_t *trident = snd_pcm_substream_chip(substream);
815 	snd_pcm_runtime_t *runtime = substream->runtime;
816 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
817 	snd_trident_voice_t *evoice = voice->extra;
818 
819 	/* voice management */
820 
821 	if (params_buffer_size(hw_params) / 2 != params_period_size(hw_params)) {
822 		if (evoice == NULL) {
823 			evoice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
824 			if (evoice == NULL)
825 				return -ENOMEM;
826 			voice->extra = evoice;
827 			evoice->substream = substream;
828 		}
829 	} else {
830 		if (evoice != NULL) {
831 			snd_trident_free_voice(trident, evoice);
832 			voice->extra = evoice = NULL;
833 		}
834 	}
835 
836 	return 0;
837 }
838 
839 /*---------------------------------------------------------------------------
840    snd_trident_hw_params
841 
842    Description: Set the hardware parameters for the playback device.
843 
844    Parameters:  substream  - PCM substream class
845 		hw_params  - hardware parameters
846 
847    Returns:     Error status
848 
849   ---------------------------------------------------------------------------*/
850 
851 static int snd_trident_hw_params(snd_pcm_substream_t * substream,
852 				 snd_pcm_hw_params_t * hw_params)
853 {
854 	int err;
855 
856 	err = snd_trident_allocate_pcm_mem(substream, hw_params);
857 	if (err >= 0)
858 		err = snd_trident_allocate_evoice(substream, hw_params);
859 	return err;
860 }
861 
862 /*---------------------------------------------------------------------------
863    snd_trident_playback_hw_free
864 
865    Description: Release the hardware resources for the playback device.
866 
867    Parameters:  substream  - PCM substream class
868 
869    Returns:     Error status
870 
871   ---------------------------------------------------------------------------*/
872 
873 static int snd_trident_hw_free(snd_pcm_substream_t * substream)
874 {
875 	trident_t *trident = snd_pcm_substream_chip(substream);
876 	snd_pcm_runtime_t *runtime = substream->runtime;
877 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
878 	snd_trident_voice_t *evoice = voice ? voice->extra : NULL;
879 
880 	if (trident->tlb.entries) {
881 		if (voice && voice->memblk) {
882 			snd_trident_free_pages(trident, voice->memblk);
883 			voice->memblk = NULL;
884 		}
885 	}
886 	snd_pcm_lib_free_pages(substream);
887 	if (evoice != NULL) {
888 		snd_trident_free_voice(trident, evoice);
889 		voice->extra = NULL;
890 	}
891 	return 0;
892 }
893 
894 /*---------------------------------------------------------------------------
895    snd_trident_playback_prepare
896 
897    Description: Prepare playback device for playback.
898 
899    Parameters:  substream  - PCM substream class
900 
901    Returns:     Error status
902 
903   ---------------------------------------------------------------------------*/
904 
905 static int snd_trident_playback_prepare(snd_pcm_substream_t * substream)
906 {
907 	trident_t *trident = snd_pcm_substream_chip(substream);
908 	snd_pcm_runtime_t *runtime = substream->runtime;
909 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
910 	snd_trident_voice_t *evoice = voice->extra;
911 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[substream->number];
912 
913 	spin_lock_irq(&trident->reg_lock);
914 
915 	/* set delta (rate) value */
916 	voice->Delta = snd_trident_convert_rate(runtime->rate);
917 	voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
918 
919 	/* set Loop Begin Address */
920 	if (voice->memblk)
921 		voice->LBA = voice->memblk->offset;
922 	else
923 		voice->LBA = runtime->dma_addr;
924 
925 	voice->CSO = 0;
926 	voice->ESO = runtime->buffer_size - 1;	/* in samples */
927 	voice->CTRL = snd_trident_control_mode(substream);
928 	voice->FMC = 3;
929 	voice->GVSel = 1;
930 	voice->EC = 0;
931 	voice->Alpha = 0;
932 	voice->FMS = 0;
933 	voice->Vol = mix->vol;
934 	voice->RVol = mix->rvol;
935 	voice->CVol = mix->cvol;
936 	voice->Pan = mix->pan;
937 	voice->Attribute = 0;
938 #if 0
939 	voice->Attribute = (1<<(30-16))|(2<<(26-16))|
940 			   (0<<(24-16))|(0x1f<<(19-16));
941 #else
942 	voice->Attribute = 0;
943 #endif
944 
945 	snd_trident_write_voice_regs(trident, voice);
946 
947 	if (evoice != NULL) {
948 		evoice->Delta = voice->Delta;
949 		evoice->spurious_threshold = voice->spurious_threshold;
950 		evoice->LBA = voice->LBA;
951 		evoice->CSO = 0;
952 		evoice->ESO = (runtime->period_size * 2) + 4 - 1; /* in samples */
953 		evoice->CTRL = voice->CTRL;
954 		evoice->FMC = 3;
955 		evoice->GVSel = trident->device == TRIDENT_DEVICE_ID_SI7018 ? 0 : 1;
956 		evoice->EC = 0;
957 		evoice->Alpha = 0;
958 		evoice->FMS = 0;
959 		evoice->Vol = 0x3ff;			/* mute */
960 		evoice->RVol = evoice->CVol = 0x7f;	/* mute */
961 		evoice->Pan = 0x7f;			/* mute */
962 #if 0
963 		evoice->Attribute = (1<<(30-16))|(2<<(26-16))|
964 				    (0<<(24-16))|(0x1f<<(19-16));
965 #else
966 		evoice->Attribute = 0;
967 #endif
968 		snd_trident_write_voice_regs(trident, evoice);
969 		evoice->isync2 = 1;
970 		evoice->isync_mark = runtime->period_size;
971 		evoice->ESO = (runtime->period_size * 2) - 1;
972 	}
973 
974 	spin_unlock_irq(&trident->reg_lock);
975 
976 	return 0;
977 }
978 
979 /*---------------------------------------------------------------------------
980    snd_trident_capture_hw_params
981 
982    Description: Set the hardware parameters for the capture device.
983 
984    Parameters:  substream  - PCM substream class
985 		hw_params  - hardware parameters
986 
987    Returns:     Error status
988 
989   ---------------------------------------------------------------------------*/
990 
991 static int snd_trident_capture_hw_params(snd_pcm_substream_t * substream,
992 					 snd_pcm_hw_params_t * hw_params)
993 {
994 	return snd_trident_allocate_pcm_mem(substream, hw_params);
995 }
996 
997 /*---------------------------------------------------------------------------
998    snd_trident_capture_prepare
999 
1000    Description: Prepare capture device for playback.
1001 
1002    Parameters:  substream  - PCM substream class
1003 
1004    Returns:     Error status
1005 
1006   ---------------------------------------------------------------------------*/
1007 
1008 static int snd_trident_capture_prepare(snd_pcm_substream_t * substream)
1009 {
1010 	trident_t *trident = snd_pcm_substream_chip(substream);
1011 	snd_pcm_runtime_t *runtime = substream->runtime;
1012 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1013 	unsigned int val, ESO_bytes;
1014 
1015 	spin_lock_irq(&trident->reg_lock);
1016 
1017 	// Initilize the channel and set channel Mode
1018 	outb(0, TRID_REG(trident, LEGACY_DMAR15));
1019 
1020 	// Set DMA channel operation mode register
1021 	outb(0x54, TRID_REG(trident, LEGACY_DMAR11));
1022 
1023 	// Set channel buffer Address, DMAR0 expects contiguous PCI memory area
1024 	voice->LBA = runtime->dma_addr;
1025 	outl(voice->LBA, TRID_REG(trident, LEGACY_DMAR0));
1026 	if (voice->memblk)
1027 		voice->LBA = voice->memblk->offset;
1028 
1029 	// set ESO
1030 	ESO_bytes = snd_pcm_lib_buffer_bytes(substream) - 1;
1031 	outb((ESO_bytes & 0x00ff0000) >> 16, TRID_REG(trident, LEGACY_DMAR6));
1032 	outw((ESO_bytes & 0x0000ffff), TRID_REG(trident, LEGACY_DMAR4));
1033 	ESO_bytes++;
1034 
1035 	// Set channel sample rate, 4.12 format
1036 	val = (((unsigned int) 48000L << 12) + (runtime->rate/2)) / runtime->rate;
1037 	outw(val, TRID_REG(trident, T4D_SBDELTA_DELTA_R));
1038 
1039 	// Set channel interrupt blk length
1040 	if (snd_pcm_format_width(runtime->format) == 16) {
1041 		val = (unsigned short) ((ESO_bytes >> 1) - 1);
1042 	} else {
1043 		val = (unsigned short) (ESO_bytes - 1);
1044 	}
1045 
1046 	outl((val << 16) | val, TRID_REG(trident, T4D_SBBL_SBCL));
1047 
1048 	// Right now, set format and start to run captureing,
1049 	// continuous run loop enable.
1050 	trident->bDMAStart = 0x19;	// 0001 1001b
1051 
1052 	if (snd_pcm_format_width(runtime->format) == 16)
1053 		trident->bDMAStart |= 0x80;
1054 	if (snd_pcm_format_signed(runtime->format))
1055 		trident->bDMAStart |= 0x20;
1056 	if (runtime->channels > 1)
1057 		trident->bDMAStart |= 0x40;
1058 
1059 	// Prepare capture intr channel
1060 
1061 	voice->Delta = snd_trident_convert_rate(runtime->rate);
1062 	voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
1063 	voice->isync = 1;
1064 	voice->isync_mark = runtime->period_size;
1065 	voice->isync_max = runtime->buffer_size;
1066 
1067 	// Set voice parameters
1068 	voice->CSO = 0;
1069 	voice->ESO = voice->isync_ESO = (runtime->period_size * 2) + 6 - 1;
1070 	voice->CTRL = snd_trident_control_mode(substream);
1071 	voice->FMC = 3;
1072 	voice->RVol = 0x7f;
1073 	voice->CVol = 0x7f;
1074 	voice->GVSel = 1;
1075 	voice->Pan = 0x7f;		/* mute */
1076 	voice->Vol = 0x3ff;		/* mute */
1077 	voice->EC = 0;
1078 	voice->Alpha = 0;
1079 	voice->FMS = 0;
1080 	voice->Attribute = 0;
1081 
1082 	snd_trident_write_voice_regs(trident, voice);
1083 
1084 	spin_unlock_irq(&trident->reg_lock);
1085 	return 0;
1086 }
1087 
1088 /*---------------------------------------------------------------------------
1089    snd_trident_si7018_capture_hw_params
1090 
1091    Description: Set the hardware parameters for the capture device.
1092 
1093    Parameters:  substream  - PCM substream class
1094 		hw_params  - hardware parameters
1095 
1096    Returns:     Error status
1097 
1098   ---------------------------------------------------------------------------*/
1099 
1100 static int snd_trident_si7018_capture_hw_params(snd_pcm_substream_t * substream,
1101 						snd_pcm_hw_params_t * hw_params)
1102 {
1103 	int err;
1104 
1105 	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
1106 		return err;
1107 
1108 	return snd_trident_allocate_evoice(substream, hw_params);
1109 }
1110 
1111 /*---------------------------------------------------------------------------
1112    snd_trident_si7018_capture_hw_free
1113 
1114    Description: Release the hardware resources for the capture device.
1115 
1116    Parameters:  substream  - PCM substream class
1117 
1118    Returns:     Error status
1119 
1120   ---------------------------------------------------------------------------*/
1121 
1122 static int snd_trident_si7018_capture_hw_free(snd_pcm_substream_t * substream)
1123 {
1124 	trident_t *trident = snd_pcm_substream_chip(substream);
1125 	snd_pcm_runtime_t *runtime = substream->runtime;
1126 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1127 	snd_trident_voice_t *evoice = voice ? voice->extra : NULL;
1128 
1129 	snd_pcm_lib_free_pages(substream);
1130 	if (evoice != NULL) {
1131 		snd_trident_free_voice(trident, evoice);
1132 		voice->extra = NULL;
1133 	}
1134 	return 0;
1135 }
1136 
1137 /*---------------------------------------------------------------------------
1138    snd_trident_si7018_capture_prepare
1139 
1140    Description: Prepare capture device for playback.
1141 
1142    Parameters:  substream  - PCM substream class
1143 
1144    Returns:     Error status
1145 
1146   ---------------------------------------------------------------------------*/
1147 
1148 static int snd_trident_si7018_capture_prepare(snd_pcm_substream_t * substream)
1149 {
1150 	trident_t *trident = snd_pcm_substream_chip(substream);
1151 	snd_pcm_runtime_t *runtime = substream->runtime;
1152 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1153 	snd_trident_voice_t *evoice = voice->extra;
1154 
1155 	spin_lock_irq(&trident->reg_lock);
1156 
1157 	voice->LBA = runtime->dma_addr;
1158 	voice->Delta = snd_trident_convert_adc_rate(runtime->rate);
1159 	voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
1160 
1161 	// Set voice parameters
1162 	voice->CSO = 0;
1163 	voice->ESO = runtime->buffer_size - 1;		/* in samples */
1164 	voice->CTRL = snd_trident_control_mode(substream);
1165 	voice->FMC = 0;
1166 	voice->RVol = 0;
1167 	voice->CVol = 0;
1168 	voice->GVSel = 1;
1169 	voice->Pan = T4D_DEFAULT_PCM_PAN;
1170 	voice->Vol = 0;
1171 	voice->EC = 0;
1172 	voice->Alpha = 0;
1173 	voice->FMS = 0;
1174 
1175 	voice->Attribute = (2 << (30-16)) |
1176 			   (2 << (26-16)) |
1177 			   (2 << (24-16)) |
1178 			   (1 << (23-16));
1179 
1180 	snd_trident_write_voice_regs(trident, voice);
1181 
1182 	if (evoice != NULL) {
1183 		evoice->Delta = snd_trident_convert_rate(runtime->rate);
1184 		evoice->spurious_threshold = voice->spurious_threshold;
1185 		evoice->LBA = voice->LBA;
1186 		evoice->CSO = 0;
1187 		evoice->ESO = (runtime->period_size * 2) + 20 - 1; /* in samples, 20 means correction */
1188 		evoice->CTRL = voice->CTRL;
1189 		evoice->FMC = 3;
1190 		evoice->GVSel = 0;
1191 		evoice->EC = 0;
1192 		evoice->Alpha = 0;
1193 		evoice->FMS = 0;
1194 		evoice->Vol = 0x3ff;			/* mute */
1195 		evoice->RVol = evoice->CVol = 0x7f;	/* mute */
1196 		evoice->Pan = 0x7f;			/* mute */
1197 		evoice->Attribute = 0;
1198 		snd_trident_write_voice_regs(trident, evoice);
1199 		evoice->isync2 = 1;
1200 		evoice->isync_mark = runtime->period_size;
1201 		evoice->ESO = (runtime->period_size * 2) - 1;
1202 	}
1203 
1204 	spin_unlock_irq(&trident->reg_lock);
1205 	return 0;
1206 }
1207 
1208 /*---------------------------------------------------------------------------
1209    snd_trident_foldback_prepare
1210 
1211    Description: Prepare foldback capture device for playback.
1212 
1213    Parameters:  substream  - PCM substream class
1214 
1215    Returns:     Error status
1216 
1217   ---------------------------------------------------------------------------*/
1218 
1219 static int snd_trident_foldback_prepare(snd_pcm_substream_t * substream)
1220 {
1221 	trident_t *trident = snd_pcm_substream_chip(substream);
1222 	snd_pcm_runtime_t *runtime = substream->runtime;
1223 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1224 	snd_trident_voice_t *evoice = voice->extra;
1225 
1226 	spin_lock_irq(&trident->reg_lock);
1227 
1228 	/* Set channel buffer Address */
1229 	if (voice->memblk)
1230 		voice->LBA = voice->memblk->offset;
1231 	else
1232 		voice->LBA = runtime->dma_addr;
1233 
1234 	/* set target ESO for channel */
1235 	voice->ESO = runtime->buffer_size - 1;	/* in samples */
1236 
1237 	/* set sample rate */
1238 	voice->Delta = 0x1000;
1239 	voice->spurious_threshold = snd_trident_spurious_threshold(48000, runtime->period_size);
1240 
1241 	voice->CSO = 0;
1242 	voice->CTRL = snd_trident_control_mode(substream);
1243 	voice->FMC = 3;
1244 	voice->RVol = 0x7f;
1245 	voice->CVol = 0x7f;
1246 	voice->GVSel = 1;
1247 	voice->Pan = 0x7f;	/* mute */
1248 	voice->Vol = 0x3ff;	/* mute */
1249 	voice->EC = 0;
1250 	voice->Alpha = 0;
1251 	voice->FMS = 0;
1252 	voice->Attribute = 0;
1253 
1254 	/* set up capture channel */
1255 	outb(((voice->number & 0x3f) | 0x80), TRID_REG(trident, T4D_RCI + voice->foldback_chan));
1256 
1257 	snd_trident_write_voice_regs(trident, voice);
1258 
1259 	if (evoice != NULL) {
1260 		evoice->Delta = voice->Delta;
1261 		evoice->spurious_threshold = voice->spurious_threshold;
1262 		evoice->LBA = voice->LBA;
1263 		evoice->CSO = 0;
1264 		evoice->ESO = (runtime->period_size * 2) + 4 - 1; /* in samples */
1265 		evoice->CTRL = voice->CTRL;
1266 		evoice->FMC = 3;
1267 		evoice->GVSel = trident->device == TRIDENT_DEVICE_ID_SI7018 ? 0 : 1;
1268 		evoice->EC = 0;
1269 		evoice->Alpha = 0;
1270 		evoice->FMS = 0;
1271 		evoice->Vol = 0x3ff;			/* mute */
1272 		evoice->RVol = evoice->CVol = 0x7f;	/* mute */
1273 		evoice->Pan = 0x7f;			/* mute */
1274 		evoice->Attribute = 0;
1275 		snd_trident_write_voice_regs(trident, evoice);
1276 		evoice->isync2 = 1;
1277 		evoice->isync_mark = runtime->period_size;
1278 		evoice->ESO = (runtime->period_size * 2) - 1;
1279 	}
1280 
1281 	spin_unlock_irq(&trident->reg_lock);
1282 	return 0;
1283 }
1284 
1285 /*---------------------------------------------------------------------------
1286    snd_trident_spdif_hw_params
1287 
1288    Description: Set the hardware parameters for the spdif device.
1289 
1290    Parameters:  substream  - PCM substream class
1291 		hw_params  - hardware parameters
1292 
1293    Returns:     Error status
1294 
1295   ---------------------------------------------------------------------------*/
1296 
1297 static int snd_trident_spdif_hw_params(snd_pcm_substream_t * substream,
1298 				       snd_pcm_hw_params_t * hw_params)
1299 {
1300 	trident_t *trident = snd_pcm_substream_chip(substream);
1301 	unsigned int old_bits = 0, change = 0;
1302 	int err;
1303 
1304 	err = snd_trident_allocate_pcm_mem(substream, hw_params);
1305 	if (err < 0)
1306 		return err;
1307 
1308 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
1309 		err = snd_trident_allocate_evoice(substream, hw_params);
1310 		if (err < 0)
1311 			return err;
1312 	}
1313 
1314 	/* prepare SPDIF channel */
1315 	spin_lock_irq(&trident->reg_lock);
1316 	old_bits = trident->spdif_pcm_bits;
1317 	if (old_bits & IEC958_AES0_PROFESSIONAL)
1318 		trident->spdif_pcm_bits &= ~IEC958_AES0_PRO_FS;
1319 	else
1320 		trident->spdif_pcm_bits &= ~(IEC958_AES3_CON_FS << 24);
1321 	if (params_rate(hw_params) >= 48000) {
1322 		trident->spdif_pcm_ctrl = 0x3c;	// 48000 Hz
1323 		trident->spdif_pcm_bits |=
1324 			trident->spdif_bits & IEC958_AES0_PROFESSIONAL ?
1325 				IEC958_AES0_PRO_FS_48000 :
1326 				(IEC958_AES3_CON_FS_48000 << 24);
1327 	}
1328 	else if (params_rate(hw_params) >= 44100) {
1329 		trident->spdif_pcm_ctrl = 0x3e;	// 44100 Hz
1330 		trident->spdif_pcm_bits |=
1331 			trident->spdif_bits & IEC958_AES0_PROFESSIONAL ?
1332 				IEC958_AES0_PRO_FS_44100 :
1333 				(IEC958_AES3_CON_FS_44100 << 24);
1334 	}
1335 	else {
1336 		trident->spdif_pcm_ctrl = 0x3d;	// 32000 Hz
1337 		trident->spdif_pcm_bits |=
1338 			trident->spdif_bits & IEC958_AES0_PROFESSIONAL ?
1339 				IEC958_AES0_PRO_FS_32000 :
1340 				(IEC958_AES3_CON_FS_32000 << 24);
1341 	}
1342 	change = old_bits != trident->spdif_pcm_bits;
1343 	spin_unlock_irq(&trident->reg_lock);
1344 
1345 	if (change)
1346 		snd_ctl_notify(trident->card, SNDRV_CTL_EVENT_MASK_VALUE, &trident->spdif_pcm_ctl->id);
1347 
1348 	return 0;
1349 }
1350 
1351 /*---------------------------------------------------------------------------
1352    snd_trident_spdif_prepare
1353 
1354    Description: Prepare SPDIF device for playback.
1355 
1356    Parameters:  substream  - PCM substream class
1357 
1358    Returns:     Error status
1359 
1360   ---------------------------------------------------------------------------*/
1361 
1362 static int snd_trident_spdif_prepare(snd_pcm_substream_t * substream)
1363 {
1364 	trident_t *trident = snd_pcm_substream_chip(substream);
1365 	snd_pcm_runtime_t *runtime = substream->runtime;
1366 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1367 	snd_trident_voice_t *evoice = voice->extra;
1368 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[substream->number];
1369 	unsigned int RESO, LBAO;
1370 	unsigned int temp;
1371 
1372 	spin_lock_irq(&trident->reg_lock);
1373 
1374 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
1375 
1376 		/* set delta (rate) value */
1377 		voice->Delta = snd_trident_convert_rate(runtime->rate);
1378 		voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
1379 
1380 		/* set Loop Back Address */
1381 		LBAO = runtime->dma_addr;
1382 		if (voice->memblk)
1383 			voice->LBA = voice->memblk->offset;
1384 		else
1385 			voice->LBA = LBAO;
1386 
1387 		voice->isync = 1;
1388 		voice->isync3 = 1;
1389 		voice->isync_mark = runtime->period_size;
1390 		voice->isync_max = runtime->buffer_size;
1391 
1392 		/* set target ESO for channel */
1393 		RESO = runtime->buffer_size - 1;
1394 		voice->ESO = voice->isync_ESO = (runtime->period_size * 2) + 6 - 1;
1395 
1396 		/* set ctrl mode */
1397 		voice->CTRL = snd_trident_control_mode(substream);
1398 
1399 		voice->FMC = 3;
1400 		voice->RVol = 0x7f;
1401 		voice->CVol = 0x7f;
1402 		voice->GVSel = 1;
1403 		voice->Pan = 0x7f;
1404 		voice->Vol = 0x3ff;
1405 		voice->EC = 0;
1406 		voice->CSO = 0;
1407 		voice->Alpha = 0;
1408 		voice->FMS = 0;
1409 		voice->Attribute = 0;
1410 
1411 		/* prepare surrogate IRQ channel */
1412 		snd_trident_write_voice_regs(trident, voice);
1413 
1414 		outw((RESO & 0xffff), TRID_REG(trident, NX_SPESO));
1415 		outb((RESO >> 16), TRID_REG(trident, NX_SPESO + 2));
1416 		outl((LBAO & 0xfffffffc), TRID_REG(trident, NX_SPLBA));
1417 		outw((voice->CSO & 0xffff), TRID_REG(trident, NX_SPCTRL_SPCSO));
1418 		outb((voice->CSO >> 16), TRID_REG(trident, NX_SPCTRL_SPCSO + 2));
1419 
1420 		/* set SPDIF setting */
1421 		outb(trident->spdif_pcm_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
1422 		outl(trident->spdif_pcm_bits, TRID_REG(trident, NX_SPCSTATUS));
1423 
1424 	} else {	/* SiS */
1425 
1426 		/* set delta (rate) value */
1427 		voice->Delta = 0x800;
1428 		voice->spurious_threshold = snd_trident_spurious_threshold(48000, runtime->period_size);
1429 
1430 		/* set Loop Begin Address */
1431 		if (voice->memblk)
1432 			voice->LBA = voice->memblk->offset;
1433 		else
1434 			voice->LBA = runtime->dma_addr;
1435 
1436 		voice->CSO = 0;
1437 		voice->ESO = runtime->buffer_size - 1;	/* in samples */
1438 		voice->CTRL = snd_trident_control_mode(substream);
1439 		voice->FMC = 3;
1440 		voice->GVSel = 1;
1441 		voice->EC = 0;
1442 		voice->Alpha = 0;
1443 		voice->FMS = 0;
1444 		voice->Vol = mix->vol;
1445 		voice->RVol = mix->rvol;
1446 		voice->CVol = mix->cvol;
1447 		voice->Pan = mix->pan;
1448 		voice->Attribute = (1<<(30-16))|(7<<(26-16))|
1449 				   (0<<(24-16))|(0<<(19-16));
1450 
1451 		snd_trident_write_voice_regs(trident, voice);
1452 
1453 		if (evoice != NULL) {
1454 			evoice->Delta = voice->Delta;
1455 			evoice->spurious_threshold = voice->spurious_threshold;
1456 			evoice->LBA = voice->LBA;
1457 			evoice->CSO = 0;
1458 			evoice->ESO = (runtime->period_size * 2) + 4 - 1; /* in samples */
1459 			evoice->CTRL = voice->CTRL;
1460 			evoice->FMC = 3;
1461 			evoice->GVSel = trident->device == TRIDENT_DEVICE_ID_SI7018 ? 0 : 1;
1462 			evoice->EC = 0;
1463 			evoice->Alpha = 0;
1464 			evoice->FMS = 0;
1465 			evoice->Vol = 0x3ff;			/* mute */
1466 			evoice->RVol = evoice->CVol = 0x7f;	/* mute */
1467 			evoice->Pan = 0x7f;			/* mute */
1468 			evoice->Attribute = 0;
1469 			snd_trident_write_voice_regs(trident, evoice);
1470 			evoice->isync2 = 1;
1471 			evoice->isync_mark = runtime->period_size;
1472 			evoice->ESO = (runtime->period_size * 2) - 1;
1473 		}
1474 
1475 		outl(trident->spdif_pcm_bits, TRID_REG(trident, SI_SPDIF_CS));
1476 		temp = inl(TRID_REG(trident, T4D_LFO_GC_CIR));
1477 		temp &= ~(1<<19);
1478 		outl(temp, TRID_REG(trident, T4D_LFO_GC_CIR));
1479 		temp = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1480 		temp |= SPDIF_EN;
1481 		outl(temp, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1482 	}
1483 
1484 	spin_unlock_irq(&trident->reg_lock);
1485 
1486 	return 0;
1487 }
1488 
1489 /*---------------------------------------------------------------------------
1490    snd_trident_trigger
1491 
1492    Description: Start/stop devices
1493 
1494    Parameters:  substream  - PCM substream class
1495    		cmd	- trigger command (STOP, GO)
1496 
1497    Returns:     Error status
1498 
1499   ---------------------------------------------------------------------------*/
1500 
1501 static int snd_trident_trigger(snd_pcm_substream_t *substream,
1502 			       int cmd)
1503 
1504 {
1505 	trident_t *trident = snd_pcm_substream_chip(substream);
1506 	struct list_head *pos;
1507 	snd_pcm_substream_t *s;
1508 	unsigned int what, whati, capture_flag, spdif_flag;
1509 	snd_trident_voice_t *voice, *evoice;
1510 	unsigned int val, go;
1511 
1512 	switch (cmd) {
1513 	case SNDRV_PCM_TRIGGER_START:
1514 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1515 	case SNDRV_PCM_TRIGGER_RESUME:
1516 		go = 1;
1517 		break;
1518 	case SNDRV_PCM_TRIGGER_STOP:
1519 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1520 	case SNDRV_PCM_TRIGGER_SUSPEND:
1521 		go = 0;
1522 		break;
1523 	default:
1524 		return -EINVAL;
1525 	}
1526 	what = whati = capture_flag = spdif_flag = 0;
1527 	spin_lock(&trident->reg_lock);
1528 	val = inl(TRID_REG(trident, T4D_STIMER)) & 0x00ffffff;
1529 	snd_pcm_group_for_each(pos, substream) {
1530 		s = snd_pcm_group_substream_entry(pos);
1531 		if ((trident_t *) snd_pcm_substream_chip(s) == trident) {
1532 			voice = (snd_trident_voice_t *) s->runtime->private_data;
1533 			evoice = voice->extra;
1534 			what |= 1 << (voice->number & 0x1f);
1535 			if (evoice == NULL) {
1536 				whati |= 1 << (voice->number & 0x1f);
1537 			} else {
1538 				what |= 1 << (evoice->number & 0x1f);
1539 				whati |= 1 << (evoice->number & 0x1f);
1540 				if (go)
1541 					evoice->stimer = val;
1542 			}
1543 			if (go) {
1544 				voice->running = 1;
1545 				voice->stimer = val;
1546 			} else {
1547 				voice->running = 0;
1548 			}
1549 			snd_pcm_trigger_done(s, substream);
1550 			if (voice->capture)
1551 				capture_flag = 1;
1552 			if (voice->spdif)
1553 				spdif_flag = 1;
1554 		}
1555 	}
1556 	if (spdif_flag) {
1557 		if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
1558 			outl(trident->spdif_pcm_bits, TRID_REG(trident, NX_SPCSTATUS));
1559 			outb(trident->spdif_pcm_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
1560 		} else {
1561 			outl(trident->spdif_pcm_bits, TRID_REG(trident, SI_SPDIF_CS));
1562 			val = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) | SPDIF_EN;
1563 			outl(val, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1564 		}
1565 	}
1566 	if (!go)
1567 		outl(what, TRID_REG(trident, T4D_STOP_B));
1568 	val = inl(TRID_REG(trident, T4D_AINTEN_B));
1569 	if (go) {
1570 		val |= whati;
1571 	} else {
1572 		val &= ~whati;
1573 	}
1574 	outl(val, TRID_REG(trident, T4D_AINTEN_B));
1575 	if (go) {
1576 		outl(what, TRID_REG(trident, T4D_START_B));
1577 
1578 		if (capture_flag && trident->device != TRIDENT_DEVICE_ID_SI7018)
1579 			outb(trident->bDMAStart, TRID_REG(trident, T4D_SBCTRL_SBE2R_SBDD));
1580 	} else {
1581 		if (capture_flag && trident->device != TRIDENT_DEVICE_ID_SI7018)
1582 			outb(0x00, TRID_REG(trident, T4D_SBCTRL_SBE2R_SBDD));
1583 	}
1584 	spin_unlock(&trident->reg_lock);
1585 	return 0;
1586 }
1587 
1588 /*---------------------------------------------------------------------------
1589    snd_trident_playback_pointer
1590 
1591    Description: This routine return the playback position
1592 
1593    Parameters:	substream  - PCM substream class
1594 
1595    Returns:     position of buffer
1596 
1597   ---------------------------------------------------------------------------*/
1598 
1599 static snd_pcm_uframes_t snd_trident_playback_pointer(snd_pcm_substream_t * substream)
1600 {
1601 	trident_t *trident = snd_pcm_substream_chip(substream);
1602 	snd_pcm_runtime_t *runtime = substream->runtime;
1603 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1604 	unsigned int cso;
1605 
1606 	if (!voice->running)
1607 		return 0;
1608 
1609 	spin_lock(&trident->reg_lock);
1610 
1611 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
1612 
1613 	if (trident->device != TRIDENT_DEVICE_ID_NX) {
1614 		cso = inw(TRID_REG(trident, CH_DX_CSO_ALPHA_FMS + 2));
1615 	} else {		// ID_4DWAVE_NX
1616 		cso = (unsigned int) inl(TRID_REG(trident, CH_NX_DELTA_CSO)) & 0x00ffffff;
1617 	}
1618 
1619 	spin_unlock(&trident->reg_lock);
1620 
1621 	if (cso >= runtime->buffer_size)
1622 		cso = 0;
1623 
1624 	return cso;
1625 }
1626 
1627 /*---------------------------------------------------------------------------
1628    snd_trident_capture_pointer
1629 
1630    Description: This routine return the capture position
1631 
1632    Paramters:   pcm1    - PCM device class
1633 
1634    Returns:     position of buffer
1635 
1636   ---------------------------------------------------------------------------*/
1637 
1638 static snd_pcm_uframes_t snd_trident_capture_pointer(snd_pcm_substream_t * substream)
1639 {
1640 	trident_t *trident = snd_pcm_substream_chip(substream);
1641 	snd_pcm_runtime_t *runtime = substream->runtime;
1642 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1643 	unsigned int result;
1644 
1645 	if (!voice->running)
1646 		return 0;
1647 
1648 	result = inw(TRID_REG(trident, T4D_SBBL_SBCL));
1649 	if (runtime->channels > 1)
1650 		result >>= 1;
1651 	if (result > 0)
1652 		result = runtime->buffer_size - result;
1653 
1654 	return result;
1655 }
1656 
1657 /*---------------------------------------------------------------------------
1658    snd_trident_spdif_pointer
1659 
1660    Description: This routine return the SPDIF playback position
1661 
1662    Parameters:	substream  - PCM substream class
1663 
1664    Returns:     position of buffer
1665 
1666   ---------------------------------------------------------------------------*/
1667 
1668 static snd_pcm_uframes_t snd_trident_spdif_pointer(snd_pcm_substream_t * substream)
1669 {
1670 	trident_t *trident = snd_pcm_substream_chip(substream);
1671 	snd_pcm_runtime_t *runtime = substream->runtime;
1672 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1673 	unsigned int result;
1674 
1675 	if (!voice->running)
1676 		return 0;
1677 
1678 	result = inl(TRID_REG(trident, NX_SPCTRL_SPCSO)) & 0x00ffffff;
1679 
1680 	return result;
1681 }
1682 
1683 /*
1684  *  Playback support device description
1685  */
1686 
1687 static snd_pcm_hardware_t snd_trident_playback =
1688 {
1689 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1690 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1691 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1692 				 SNDRV_PCM_INFO_PAUSE /* | SNDRV_PCM_INFO_RESUME */),
1693 	.formats =		(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
1694 				 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
1695 	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
1696 	.rate_min =		4000,
1697 	.rate_max =		48000,
1698 	.channels_min =		1,
1699 	.channels_max =		2,
1700 	.buffer_bytes_max =	(256*1024),
1701 	.period_bytes_min =	64,
1702 	.period_bytes_max =	(256*1024),
1703 	.periods_min =		1,
1704 	.periods_max =		1024,
1705 	.fifo_size =		0,
1706 };
1707 
1708 /*
1709  *  Capture support device description
1710  */
1711 
1712 static snd_pcm_hardware_t snd_trident_capture =
1713 {
1714 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1715 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1716 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1717 				 SNDRV_PCM_INFO_PAUSE /* | SNDRV_PCM_INFO_RESUME */),
1718 	.formats =		(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
1719 				 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
1720 	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
1721 	.rate_min =		4000,
1722 	.rate_max =		48000,
1723 	.channels_min =		1,
1724 	.channels_max =		2,
1725 	.buffer_bytes_max =	(128*1024),
1726 	.period_bytes_min =	64,
1727 	.period_bytes_max =	(128*1024),
1728 	.periods_min =		1,
1729 	.periods_max =		1024,
1730 	.fifo_size =		0,
1731 };
1732 
1733 /*
1734  *  Foldback capture support device description
1735  */
1736 
1737 static snd_pcm_hardware_t snd_trident_foldback =
1738 {
1739 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1740 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1741 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1742 				 SNDRV_PCM_INFO_PAUSE /* | SNDRV_PCM_INFO_RESUME */),
1743 	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
1744 	.rates =		SNDRV_PCM_RATE_48000,
1745 	.rate_min =		48000,
1746 	.rate_max =		48000,
1747 	.channels_min =		2,
1748 	.channels_max =		2,
1749 	.buffer_bytes_max =	(128*1024),
1750 	.period_bytes_min =	64,
1751 	.period_bytes_max =	(128*1024),
1752 	.periods_min =		1,
1753 	.periods_max =		1024,
1754 	.fifo_size =		0,
1755 };
1756 
1757 /*
1758  *  SPDIF playback support device description
1759  */
1760 
1761 static snd_pcm_hardware_t snd_trident_spdif =
1762 {
1763 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1764 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1765 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1766 				 SNDRV_PCM_INFO_PAUSE /* | SNDRV_PCM_INFO_RESUME */),
1767 	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
1768 	.rates =		(SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
1769 				 SNDRV_PCM_RATE_48000),
1770 	.rate_min =		32000,
1771 	.rate_max =		48000,
1772 	.channels_min =		2,
1773 	.channels_max =		2,
1774 	.buffer_bytes_max =	(128*1024),
1775 	.period_bytes_min =	64,
1776 	.period_bytes_max =	(128*1024),
1777 	.periods_min =		1,
1778 	.periods_max =		1024,
1779 	.fifo_size =		0,
1780 };
1781 
1782 static snd_pcm_hardware_t snd_trident_spdif_7018 =
1783 {
1784 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1785 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1786 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1787 				 SNDRV_PCM_INFO_PAUSE /* | SNDRV_PCM_INFO_RESUME */),
1788 	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
1789 	.rates =		SNDRV_PCM_RATE_48000,
1790 	.rate_min =		48000,
1791 	.rate_max =		48000,
1792 	.channels_min =		2,
1793 	.channels_max =		2,
1794 	.buffer_bytes_max =	(128*1024),
1795 	.period_bytes_min =	64,
1796 	.period_bytes_max =	(128*1024),
1797 	.periods_min =		1,
1798 	.periods_max =		1024,
1799 	.fifo_size =		0,
1800 };
1801 
1802 static void snd_trident_pcm_free_substream(snd_pcm_runtime_t *runtime)
1803 {
1804 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1805 	trident_t *trident;
1806 
1807 	if (voice) {
1808 		trident = voice->trident;
1809 		snd_trident_free_voice(trident, voice);
1810 	}
1811 }
1812 
1813 static int snd_trident_playback_open(snd_pcm_substream_t * substream)
1814 {
1815 	trident_t *trident = snd_pcm_substream_chip(substream);
1816 	snd_pcm_runtime_t *runtime = substream->runtime;
1817 	snd_trident_voice_t *voice;
1818 
1819 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
1820 	if (voice == NULL)
1821 		return -EAGAIN;
1822 	snd_trident_pcm_mixer_build(trident, voice, substream);
1823 	voice->substream = substream;
1824 	runtime->private_data = voice;
1825 	runtime->private_free = snd_trident_pcm_free_substream;
1826 	runtime->hw = snd_trident_playback;
1827 	snd_pcm_set_sync(substream);
1828 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
1829 	return 0;
1830 }
1831 
1832 /*---------------------------------------------------------------------------
1833    snd_trident_playback_close
1834 
1835    Description: This routine will close the 4DWave playback device. For now
1836                 we will simply free the dma transfer buffer.
1837 
1838    Parameters:	substream  - PCM substream class
1839 
1840   ---------------------------------------------------------------------------*/
1841 static int snd_trident_playback_close(snd_pcm_substream_t * substream)
1842 {
1843 	trident_t *trident = snd_pcm_substream_chip(substream);
1844 	snd_pcm_runtime_t *runtime = substream->runtime;
1845 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1846 
1847 	snd_trident_pcm_mixer_free(trident, voice, substream);
1848 	return 0;
1849 }
1850 
1851 /*---------------------------------------------------------------------------
1852    snd_trident_spdif_open
1853 
1854    Description: This routine will open the 4DWave SPDIF device.
1855 
1856    Parameters:	substream  - PCM substream class
1857 
1858    Returns:     status  - success or failure flag
1859 
1860   ---------------------------------------------------------------------------*/
1861 
1862 static int snd_trident_spdif_open(snd_pcm_substream_t * substream)
1863 {
1864 	trident_t *trident = snd_pcm_substream_chip(substream);
1865 	snd_trident_voice_t *voice;
1866 	snd_pcm_runtime_t *runtime = substream->runtime;
1867 
1868 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
1869 	if (voice == NULL)
1870 		return -EAGAIN;
1871 	voice->spdif = 1;
1872 	voice->substream = substream;
1873 	spin_lock_irq(&trident->reg_lock);
1874 	trident->spdif_pcm_bits = trident->spdif_bits;
1875 	spin_unlock_irq(&trident->reg_lock);
1876 
1877 	runtime->private_data = voice;
1878 	runtime->private_free = snd_trident_pcm_free_substream;
1879 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
1880 		runtime->hw = snd_trident_spdif;
1881 	} else {
1882 		runtime->hw = snd_trident_spdif_7018;
1883 	}
1884 
1885 	trident->spdif_pcm_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1886 	snd_ctl_notify(trident->card, SNDRV_CTL_EVENT_MASK_VALUE |
1887 		       SNDRV_CTL_EVENT_MASK_INFO, &trident->spdif_pcm_ctl->id);
1888 
1889 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
1890 	return 0;
1891 }
1892 
1893 
1894 /*---------------------------------------------------------------------------
1895    snd_trident_spdif_close
1896 
1897    Description: This routine will close the 4DWave SPDIF device.
1898 
1899    Parameters:	substream  - PCM substream class
1900 
1901   ---------------------------------------------------------------------------*/
1902 
1903 static int snd_trident_spdif_close(snd_pcm_substream_t * substream)
1904 {
1905 	trident_t *trident = snd_pcm_substream_chip(substream);
1906 	unsigned int temp;
1907 
1908 	spin_lock_irq(&trident->reg_lock);
1909 	// restore default SPDIF setting
1910 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
1911 		outb(trident->spdif_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
1912 		outl(trident->spdif_bits, TRID_REG(trident, NX_SPCSTATUS));
1913 	} else {
1914 		outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
1915 		temp = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1916 		if (trident->spdif_ctrl) {
1917 			temp |= SPDIF_EN;
1918 		} else {
1919 			temp &= ~SPDIF_EN;
1920 		}
1921 		outl(temp, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1922 	}
1923 	spin_unlock_irq(&trident->reg_lock);
1924 	trident->spdif_pcm_ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1925 	snd_ctl_notify(trident->card, SNDRV_CTL_EVENT_MASK_VALUE |
1926 		       SNDRV_CTL_EVENT_MASK_INFO, &trident->spdif_pcm_ctl->id);
1927 	return 0;
1928 }
1929 
1930 /*---------------------------------------------------------------------------
1931    snd_trident_capture_open
1932 
1933    Description: This routine will open the 4DWave capture device.
1934 
1935    Parameters:	substream  - PCM substream class
1936 
1937    Returns:     status  - success or failure flag
1938 
1939   ---------------------------------------------------------------------------*/
1940 
1941 static int snd_trident_capture_open(snd_pcm_substream_t * substream)
1942 {
1943 	trident_t *trident = snd_pcm_substream_chip(substream);
1944 	snd_trident_voice_t *voice;
1945 	snd_pcm_runtime_t *runtime = substream->runtime;
1946 
1947 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
1948 	if (voice == NULL)
1949 		return -EAGAIN;
1950 	voice->capture = 1;
1951 	voice->substream = substream;
1952 	runtime->private_data = voice;
1953 	runtime->private_free = snd_trident_pcm_free_substream;
1954 	runtime->hw = snd_trident_capture;
1955 	snd_pcm_set_sync(substream);
1956 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
1957 	return 0;
1958 }
1959 
1960 /*---------------------------------------------------------------------------
1961    snd_trident_capture_close
1962 
1963    Description: This routine will close the 4DWave capture device. For now
1964                 we will simply free the dma transfer buffer.
1965 
1966    Parameters:	substream  - PCM substream class
1967 
1968   ---------------------------------------------------------------------------*/
1969 static int snd_trident_capture_close(snd_pcm_substream_t * substream)
1970 {
1971 	return 0;
1972 }
1973 
1974 /*---------------------------------------------------------------------------
1975    snd_trident_foldback_open
1976 
1977    Description: This routine will open the 4DWave foldback capture device.
1978 
1979    Parameters:	substream  - PCM substream class
1980 
1981    Returns:     status  - success or failure flag
1982 
1983   ---------------------------------------------------------------------------*/
1984 
1985 static int snd_trident_foldback_open(snd_pcm_substream_t * substream)
1986 {
1987 	trident_t *trident = snd_pcm_substream_chip(substream);
1988 	snd_trident_voice_t *voice;
1989 	snd_pcm_runtime_t *runtime = substream->runtime;
1990 
1991 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
1992 	if (voice == NULL)
1993 		return -EAGAIN;
1994 	voice->foldback_chan = substream->number;
1995 	voice->substream = substream;
1996 	runtime->private_data = voice;
1997 	runtime->private_free = snd_trident_pcm_free_substream;
1998 	runtime->hw = snd_trident_foldback;
1999 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
2000 	return 0;
2001 }
2002 
2003 /*---------------------------------------------------------------------------
2004    snd_trident_foldback_close
2005 
2006    Description: This routine will close the 4DWave foldback capture device.
2007 		For now we will simply free the dma transfer buffer.
2008 
2009    Parameters:	substream  - PCM substream class
2010 
2011   ---------------------------------------------------------------------------*/
2012 static int snd_trident_foldback_close(snd_pcm_substream_t * substream)
2013 {
2014 	trident_t *trident = snd_pcm_substream_chip(substream);
2015 	snd_trident_voice_t *voice;
2016 	snd_pcm_runtime_t *runtime = substream->runtime;
2017 	voice = (snd_trident_voice_t *) runtime->private_data;
2018 
2019 	/* stop capture channel */
2020 	spin_lock_irq(&trident->reg_lock);
2021 	outb(0x00, TRID_REG(trident, T4D_RCI + voice->foldback_chan));
2022 	spin_unlock_irq(&trident->reg_lock);
2023 	return 0;
2024 }
2025 
2026 /*---------------------------------------------------------------------------
2027    PCM operations
2028   ---------------------------------------------------------------------------*/
2029 
2030 static snd_pcm_ops_t snd_trident_playback_ops = {
2031 	.open =		snd_trident_playback_open,
2032 	.close =	snd_trident_playback_close,
2033 	.ioctl =	snd_trident_ioctl,
2034 	.hw_params =	snd_trident_hw_params,
2035 	.hw_free =	snd_trident_hw_free,
2036 	.prepare =	snd_trident_playback_prepare,
2037 	.trigger =	snd_trident_trigger,
2038 	.pointer =	snd_trident_playback_pointer,
2039 };
2040 
2041 static snd_pcm_ops_t snd_trident_nx_playback_ops = {
2042 	.open =		snd_trident_playback_open,
2043 	.close =	snd_trident_playback_close,
2044 	.ioctl =	snd_trident_ioctl,
2045 	.hw_params =	snd_trident_hw_params,
2046 	.hw_free =	snd_trident_hw_free,
2047 	.prepare =	snd_trident_playback_prepare,
2048 	.trigger =	snd_trident_trigger,
2049 	.pointer =	snd_trident_playback_pointer,
2050 	.page =		snd_pcm_sgbuf_ops_page,
2051 };
2052 
2053 static snd_pcm_ops_t snd_trident_capture_ops = {
2054 	.open =		snd_trident_capture_open,
2055 	.close =	snd_trident_capture_close,
2056 	.ioctl =	snd_trident_ioctl,
2057 	.hw_params =	snd_trident_capture_hw_params,
2058 	.hw_free =	snd_trident_hw_free,
2059 	.prepare =	snd_trident_capture_prepare,
2060 	.trigger =	snd_trident_trigger,
2061 	.pointer =	snd_trident_capture_pointer,
2062 };
2063 
2064 static snd_pcm_ops_t snd_trident_si7018_capture_ops = {
2065 	.open =		snd_trident_capture_open,
2066 	.close =	snd_trident_capture_close,
2067 	.ioctl =	snd_trident_ioctl,
2068 	.hw_params =	snd_trident_si7018_capture_hw_params,
2069 	.hw_free =	snd_trident_si7018_capture_hw_free,
2070 	.prepare =	snd_trident_si7018_capture_prepare,
2071 	.trigger =	snd_trident_trigger,
2072 	.pointer =	snd_trident_playback_pointer,
2073 };
2074 
2075 static snd_pcm_ops_t snd_trident_foldback_ops = {
2076 	.open =		snd_trident_foldback_open,
2077 	.close =	snd_trident_foldback_close,
2078 	.ioctl =	snd_trident_ioctl,
2079 	.hw_params =	snd_trident_hw_params,
2080 	.hw_free =	snd_trident_hw_free,
2081 	.prepare =	snd_trident_foldback_prepare,
2082 	.trigger =	snd_trident_trigger,
2083 	.pointer =	snd_trident_playback_pointer,
2084 };
2085 
2086 static snd_pcm_ops_t snd_trident_nx_foldback_ops = {
2087 	.open =		snd_trident_foldback_open,
2088 	.close =	snd_trident_foldback_close,
2089 	.ioctl =	snd_trident_ioctl,
2090 	.hw_params =	snd_trident_hw_params,
2091 	.hw_free =	snd_trident_hw_free,
2092 	.prepare =	snd_trident_foldback_prepare,
2093 	.trigger =	snd_trident_trigger,
2094 	.pointer =	snd_trident_playback_pointer,
2095 	.page =		snd_pcm_sgbuf_ops_page,
2096 };
2097 
2098 static snd_pcm_ops_t snd_trident_spdif_ops = {
2099 	.open =		snd_trident_spdif_open,
2100 	.close =	snd_trident_spdif_close,
2101 	.ioctl =	snd_trident_ioctl,
2102 	.hw_params =	snd_trident_spdif_hw_params,
2103 	.hw_free =	snd_trident_hw_free,
2104 	.prepare =	snd_trident_spdif_prepare,
2105 	.trigger =	snd_trident_trigger,
2106 	.pointer =	snd_trident_spdif_pointer,
2107 };
2108 
2109 static snd_pcm_ops_t snd_trident_spdif_7018_ops = {
2110 	.open =		snd_trident_spdif_open,
2111 	.close =	snd_trident_spdif_close,
2112 	.ioctl =	snd_trident_ioctl,
2113 	.hw_params =	snd_trident_spdif_hw_params,
2114 	.hw_free =	snd_trident_hw_free,
2115 	.prepare =	snd_trident_spdif_prepare,
2116 	.trigger =	snd_trident_trigger,
2117 	.pointer =	snd_trident_playback_pointer,
2118 };
2119 
2120 /*---------------------------------------------------------------------------
2121    snd_trident_pcm_free
2122 
2123    Description: This routine release the 4DWave private data.
2124 
2125    Paramters:   private_data - pointer to 4DWave device info.
2126 
2127    Returns:     None
2128 
2129   ---------------------------------------------------------------------------*/
2130 static void snd_trident_pcm_free(snd_pcm_t *pcm)
2131 {
2132 	trident_t *trident = pcm->private_data;
2133 	trident->pcm = NULL;
2134 	snd_pcm_lib_preallocate_free_for_all(pcm);
2135 }
2136 
2137 static void snd_trident_foldback_pcm_free(snd_pcm_t *pcm)
2138 {
2139 	trident_t *trident = pcm->private_data;
2140 	trident->foldback = NULL;
2141 	snd_pcm_lib_preallocate_free_for_all(pcm);
2142 }
2143 
2144 static void snd_trident_spdif_pcm_free(snd_pcm_t *pcm)
2145 {
2146 	trident_t *trident = pcm->private_data;
2147 	trident->spdif = NULL;
2148 	snd_pcm_lib_preallocate_free_for_all(pcm);
2149 }
2150 
2151 /*---------------------------------------------------------------------------
2152    snd_trident_pcm
2153 
2154    Description: This routine registers the 4DWave device for PCM support.
2155 
2156    Paramters:   trident - pointer to target device class for 4DWave.
2157 
2158    Returns:     None
2159 
2160   ---------------------------------------------------------------------------*/
2161 
2162 int __devinit snd_trident_pcm(trident_t * trident, int device, snd_pcm_t ** rpcm)
2163 {
2164 	snd_pcm_t *pcm;
2165 	int err;
2166 
2167 	if (rpcm)
2168 		*rpcm = NULL;
2169 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx", device, trident->ChanPCM, 1, &pcm)) < 0)
2170 		return err;
2171 
2172 	pcm->private_data = trident;
2173 	pcm->private_free = snd_trident_pcm_free;
2174 
2175 	if (trident->tlb.entries) {
2176 		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_nx_playback_ops);
2177 	} else {
2178 		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_playback_ops);
2179 	}
2180 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
2181 			trident->device != TRIDENT_DEVICE_ID_SI7018 ?
2182 			&snd_trident_capture_ops :
2183 			&snd_trident_si7018_capture_ops);
2184 
2185 	pcm->info_flags = 0;
2186 	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
2187 	strcpy(pcm->name, "Trident 4DWave");
2188 	trident->pcm = pcm;
2189 
2190 	if (trident->tlb.entries) {
2191 		snd_pcm_substream_t *substream;
2192 		for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next)
2193 			snd_pcm_lib_preallocate_pages(substream, SNDRV_DMA_TYPE_DEV_SG,
2194 						      snd_dma_pci_data(trident->pci),
2195 						      64*1024, 128*1024);
2196 		snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
2197 					      SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(trident->pci),
2198 					      64*1024, 128*1024);
2199 	} else {
2200 		snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
2201 						      snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
2202 	}
2203 
2204 	if (rpcm)
2205 		*rpcm = pcm;
2206 	return 0;
2207 }
2208 
2209 /*---------------------------------------------------------------------------
2210    snd_trident_foldback_pcm
2211 
2212    Description: This routine registers the 4DWave device for foldback PCM support.
2213 
2214    Paramters:   trident - pointer to target device class for 4DWave.
2215 
2216    Returns:     None
2217 
2218   ---------------------------------------------------------------------------*/
2219 
2220 int __devinit snd_trident_foldback_pcm(trident_t * trident, int device, snd_pcm_t ** rpcm)
2221 {
2222 	snd_pcm_t *foldback;
2223 	int err;
2224 	int num_chan = 3;
2225 	snd_pcm_substream_t *substream;
2226 
2227 	if (rpcm)
2228 		*rpcm = NULL;
2229 	if (trident->device == TRIDENT_DEVICE_ID_NX)
2230 		num_chan = 4;
2231 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx", device, 0, num_chan, &foldback)) < 0)
2232 		return err;
2233 
2234 	foldback->private_data = trident;
2235 	foldback->private_free = snd_trident_foldback_pcm_free;
2236 	if (trident->tlb.entries)
2237 		snd_pcm_set_ops(foldback, SNDRV_PCM_STREAM_CAPTURE, &snd_trident_nx_foldback_ops);
2238 	else
2239 		snd_pcm_set_ops(foldback, SNDRV_PCM_STREAM_CAPTURE, &snd_trident_foldback_ops);
2240 	foldback->info_flags = 0;
2241 	strcpy(foldback->name, "Trident 4DWave");
2242 	substream = foldback->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
2243 	strcpy(substream->name, "Front Mixer");
2244 	substream = substream->next;
2245 	strcpy(substream->name, "Reverb Mixer");
2246 	substream = substream->next;
2247 	strcpy(substream->name, "Chorus Mixer");
2248 	if (num_chan == 4) {
2249 		substream = substream->next;
2250 		strcpy(substream->name, "Second AC'97 ADC");
2251 	}
2252 	trident->foldback = foldback;
2253 
2254 	if (trident->tlb.entries)
2255 		snd_pcm_lib_preallocate_pages_for_all(foldback, SNDRV_DMA_TYPE_DEV_SG,
2256 						      snd_dma_pci_data(trident->pci), 0, 128*1024);
2257 	else
2258 		snd_pcm_lib_preallocate_pages_for_all(foldback, SNDRV_DMA_TYPE_DEV,
2259 						      snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
2260 
2261 	if (rpcm)
2262 		*rpcm = foldback;
2263 	return 0;
2264 }
2265 
2266 /*---------------------------------------------------------------------------
2267    snd_trident_spdif
2268 
2269    Description: This routine registers the 4DWave-NX device for SPDIF support.
2270 
2271    Paramters:   trident - pointer to target device class for 4DWave-NX.
2272 
2273    Returns:     None
2274 
2275   ---------------------------------------------------------------------------*/
2276 
2277 int __devinit snd_trident_spdif_pcm(trident_t * trident, int device, snd_pcm_t ** rpcm)
2278 {
2279 	snd_pcm_t *spdif;
2280 	int err;
2281 
2282 	if (rpcm)
2283 		*rpcm = NULL;
2284 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx IEC958", device, 1, 0, &spdif)) < 0)
2285 		return err;
2286 
2287 	spdif->private_data = trident;
2288 	spdif->private_free = snd_trident_spdif_pcm_free;
2289 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2290 		snd_pcm_set_ops(spdif, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_spdif_ops);
2291 	} else {
2292 		snd_pcm_set_ops(spdif, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_spdif_7018_ops);
2293 	}
2294 	spdif->info_flags = 0;
2295 	strcpy(spdif->name, "Trident 4DWave IEC958");
2296 	trident->spdif = spdif;
2297 
2298 	snd_pcm_lib_preallocate_pages_for_all(spdif, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
2299 
2300 	if (rpcm)
2301 		*rpcm = spdif;
2302 	return 0;
2303 }
2304 
2305 /*
2306  *  Mixer part
2307  */
2308 
2309 
2310 /*---------------------------------------------------------------------------
2311     snd_trident_spdif_control
2312 
2313     Description: enable/disable S/PDIF out from ac97 mixer
2314   ---------------------------------------------------------------------------*/
2315 
2316 static int snd_trident_spdif_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2317 {
2318 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2319 	uinfo->count = 1;
2320 	uinfo->value.integer.min = 0;
2321 	uinfo->value.integer.max = 1;
2322 	return 0;
2323 }
2324 
2325 static int snd_trident_spdif_control_get(snd_kcontrol_t * kcontrol,
2326 					 snd_ctl_elem_value_t * ucontrol)
2327 {
2328 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2329 	unsigned char val;
2330 
2331 	spin_lock_irq(&trident->reg_lock);
2332 	val = trident->spdif_ctrl;
2333 	ucontrol->value.integer.value[0] = val == kcontrol->private_value;
2334 	spin_unlock_irq(&trident->reg_lock);
2335 	return 0;
2336 }
2337 
2338 static int snd_trident_spdif_control_put(snd_kcontrol_t * kcontrol,
2339 					 snd_ctl_elem_value_t * ucontrol)
2340 {
2341 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2342 	unsigned char val;
2343 	int change;
2344 
2345 	val = ucontrol->value.integer.value[0] ? (unsigned char) kcontrol->private_value : 0x00;
2346 	spin_lock_irq(&trident->reg_lock);
2347 	/* S/PDIF C Channel bits 0-31 : 48khz, SCMS disabled */
2348 	change = trident->spdif_ctrl != val;
2349 	trident->spdif_ctrl = val;
2350 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2351 		if ((inb(TRID_REG(trident, NX_SPCTRL_SPCSO + 3)) & 0x10) == 0) {
2352 			outl(trident->spdif_bits, TRID_REG(trident, NX_SPCSTATUS));
2353 			outb(trident->spdif_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
2354 		}
2355 	} else {
2356 		if (trident->spdif == NULL) {
2357 			unsigned int temp;
2358 			outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
2359 			temp = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) & ~SPDIF_EN;
2360 			if (val)
2361 				temp |= SPDIF_EN;
2362 			outl(temp, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
2363 		}
2364 	}
2365 	spin_unlock_irq(&trident->reg_lock);
2366 	return change;
2367 }
2368 
2369 static snd_kcontrol_new_t snd_trident_spdif_control __devinitdata =
2370 {
2371 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2372 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,SWITCH),
2373 	.info =		snd_trident_spdif_control_info,
2374 	.get =		snd_trident_spdif_control_get,
2375 	.put =		snd_trident_spdif_control_put,
2376 	.private_value = 0x28,
2377 };
2378 
2379 /*---------------------------------------------------------------------------
2380     snd_trident_spdif_default
2381 
2382     Description: put/get the S/PDIF default settings
2383   ---------------------------------------------------------------------------*/
2384 
2385 static int snd_trident_spdif_default_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2386 {
2387 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
2388 	uinfo->count = 1;
2389 	return 0;
2390 }
2391 
2392 static int snd_trident_spdif_default_get(snd_kcontrol_t * kcontrol,
2393 					 snd_ctl_elem_value_t * ucontrol)
2394 {
2395 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2396 
2397 	spin_lock_irq(&trident->reg_lock);
2398 	ucontrol->value.iec958.status[0] = (trident->spdif_bits >> 0) & 0xff;
2399 	ucontrol->value.iec958.status[1] = (trident->spdif_bits >> 8) & 0xff;
2400 	ucontrol->value.iec958.status[2] = (trident->spdif_bits >> 16) & 0xff;
2401 	ucontrol->value.iec958.status[3] = (trident->spdif_bits >> 24) & 0xff;
2402 	spin_unlock_irq(&trident->reg_lock);
2403 	return 0;
2404 }
2405 
2406 static int snd_trident_spdif_default_put(snd_kcontrol_t * kcontrol,
2407 					 snd_ctl_elem_value_t * ucontrol)
2408 {
2409 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2410 	unsigned int val;
2411 	int change;
2412 
2413 	val = (ucontrol->value.iec958.status[0] << 0) |
2414 	      (ucontrol->value.iec958.status[1] << 8) |
2415 	      (ucontrol->value.iec958.status[2] << 16) |
2416 	      (ucontrol->value.iec958.status[3] << 24);
2417 	spin_lock_irq(&trident->reg_lock);
2418 	change = trident->spdif_bits != val;
2419 	trident->spdif_bits = val;
2420 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2421 		if ((inb(TRID_REG(trident, NX_SPCTRL_SPCSO + 3)) & 0x10) == 0)
2422 			outl(trident->spdif_bits, TRID_REG(trident, NX_SPCSTATUS));
2423 	} else {
2424 		if (trident->spdif == NULL)
2425 			outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
2426 	}
2427 	spin_unlock_irq(&trident->reg_lock);
2428 	return change;
2429 }
2430 
2431 static snd_kcontrol_new_t snd_trident_spdif_default __devinitdata =
2432 {
2433 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
2434 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
2435 	.info =		snd_trident_spdif_default_info,
2436 	.get =		snd_trident_spdif_default_get,
2437 	.put =		snd_trident_spdif_default_put
2438 };
2439 
2440 /*---------------------------------------------------------------------------
2441     snd_trident_spdif_mask
2442 
2443     Description: put/get the S/PDIF mask
2444   ---------------------------------------------------------------------------*/
2445 
2446 static int snd_trident_spdif_mask_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2447 {
2448 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
2449 	uinfo->count = 1;
2450 	return 0;
2451 }
2452 
2453 static int snd_trident_spdif_mask_get(snd_kcontrol_t * kcontrol,
2454 				      snd_ctl_elem_value_t * ucontrol)
2455 {
2456 	ucontrol->value.iec958.status[0] = 0xff;
2457 	ucontrol->value.iec958.status[1] = 0xff;
2458 	ucontrol->value.iec958.status[2] = 0xff;
2459 	ucontrol->value.iec958.status[3] = 0xff;
2460 	return 0;
2461 }
2462 
2463 static snd_kcontrol_new_t snd_trident_spdif_mask __devinitdata =
2464 {
2465 	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
2466 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
2467 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
2468 	.info =		snd_trident_spdif_mask_info,
2469 	.get =		snd_trident_spdif_mask_get,
2470 };
2471 
2472 /*---------------------------------------------------------------------------
2473     snd_trident_spdif_stream
2474 
2475     Description: put/get the S/PDIF stream settings
2476   ---------------------------------------------------------------------------*/
2477 
2478 static int snd_trident_spdif_stream_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2479 {
2480 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
2481 	uinfo->count = 1;
2482 	return 0;
2483 }
2484 
2485 static int snd_trident_spdif_stream_get(snd_kcontrol_t * kcontrol,
2486 					snd_ctl_elem_value_t * ucontrol)
2487 {
2488 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2489 
2490 	spin_lock_irq(&trident->reg_lock);
2491 	ucontrol->value.iec958.status[0] = (trident->spdif_pcm_bits >> 0) & 0xff;
2492 	ucontrol->value.iec958.status[1] = (trident->spdif_pcm_bits >> 8) & 0xff;
2493 	ucontrol->value.iec958.status[2] = (trident->spdif_pcm_bits >> 16) & 0xff;
2494 	ucontrol->value.iec958.status[3] = (trident->spdif_pcm_bits >> 24) & 0xff;
2495 	spin_unlock_irq(&trident->reg_lock);
2496 	return 0;
2497 }
2498 
2499 static int snd_trident_spdif_stream_put(snd_kcontrol_t * kcontrol,
2500 					snd_ctl_elem_value_t * ucontrol)
2501 {
2502 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2503 	unsigned int val;
2504 	int change;
2505 
2506 	val = (ucontrol->value.iec958.status[0] << 0) |
2507 	      (ucontrol->value.iec958.status[1] << 8) |
2508 	      (ucontrol->value.iec958.status[2] << 16) |
2509 	      (ucontrol->value.iec958.status[3] << 24);
2510 	spin_lock_irq(&trident->reg_lock);
2511 	change = trident->spdif_pcm_bits != val;
2512 	trident->spdif_pcm_bits = val;
2513 	if (trident->spdif != NULL) {
2514 		if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2515 			outl(trident->spdif_pcm_bits, TRID_REG(trident, NX_SPCSTATUS));
2516 		} else {
2517 			outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
2518 		}
2519 	}
2520 	spin_unlock_irq(&trident->reg_lock);
2521 	return change;
2522 }
2523 
2524 static snd_kcontrol_new_t snd_trident_spdif_stream __devinitdata =
2525 {
2526 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2527 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
2528 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM),
2529 	.info =		snd_trident_spdif_stream_info,
2530 	.get =		snd_trident_spdif_stream_get,
2531 	.put =		snd_trident_spdif_stream_put
2532 };
2533 
2534 /*---------------------------------------------------------------------------
2535     snd_trident_ac97_control
2536 
2537     Description: enable/disable rear path for ac97
2538   ---------------------------------------------------------------------------*/
2539 
2540 static int snd_trident_ac97_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2541 {
2542 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2543 	uinfo->count = 1;
2544 	uinfo->value.integer.min = 0;
2545 	uinfo->value.integer.max = 1;
2546 	return 0;
2547 }
2548 
2549 static int snd_trident_ac97_control_get(snd_kcontrol_t * kcontrol,
2550 					snd_ctl_elem_value_t * ucontrol)
2551 {
2552 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2553 	unsigned char val;
2554 
2555 	spin_lock_irq(&trident->reg_lock);
2556 	val = trident->ac97_ctrl = inl(TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
2557 	ucontrol->value.integer.value[0] = (val & (1 << kcontrol->private_value)) ? 1 : 0;
2558 	spin_unlock_irq(&trident->reg_lock);
2559 	return 0;
2560 }
2561 
2562 static int snd_trident_ac97_control_put(snd_kcontrol_t * kcontrol,
2563 					snd_ctl_elem_value_t * ucontrol)
2564 {
2565 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2566 	unsigned char val;
2567 	int change = 0;
2568 
2569 	spin_lock_irq(&trident->reg_lock);
2570 	val = trident->ac97_ctrl = inl(TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
2571 	val &= ~(1 << kcontrol->private_value);
2572 	if (ucontrol->value.integer.value[0])
2573 		val |= 1 << kcontrol->private_value;
2574 	change = val != trident->ac97_ctrl;
2575 	trident->ac97_ctrl = val;
2576 	outl(trident->ac97_ctrl = val, TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
2577 	spin_unlock_irq(&trident->reg_lock);
2578 	return change;
2579 }
2580 
2581 static snd_kcontrol_new_t snd_trident_ac97_rear_control __devinitdata =
2582 {
2583 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2584 	.name =         "Rear Path",
2585 	.info =		snd_trident_ac97_control_info,
2586 	.get =		snd_trident_ac97_control_get,
2587 	.put =		snd_trident_ac97_control_put,
2588 	.private_value = 4,
2589 };
2590 
2591 /*---------------------------------------------------------------------------
2592     snd_trident_vol_control
2593 
2594     Description: wave & music volume control
2595   ---------------------------------------------------------------------------*/
2596 
2597 static int snd_trident_vol_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2598 {
2599 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2600 	uinfo->count = 2;
2601 	uinfo->value.integer.min = 0;
2602 	uinfo->value.integer.max = 255;
2603 	return 0;
2604 }
2605 
2606 static int snd_trident_vol_control_get(snd_kcontrol_t * kcontrol,
2607 				       snd_ctl_elem_value_t * ucontrol)
2608 {
2609 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2610 	unsigned int val;
2611 
2612 	val = trident->musicvol_wavevol;
2613 	ucontrol->value.integer.value[0] = 255 - ((val >> kcontrol->private_value) & 0xff);
2614 	ucontrol->value.integer.value[1] = 255 - ((val >> (kcontrol->private_value + 8)) & 0xff);
2615 	return 0;
2616 }
2617 
2618 static int snd_trident_vol_control_put(snd_kcontrol_t * kcontrol,
2619 				       snd_ctl_elem_value_t * ucontrol)
2620 {
2621 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2622 	unsigned int val;
2623 	int change = 0;
2624 
2625 	spin_lock_irq(&trident->reg_lock);
2626 	val = trident->musicvol_wavevol;
2627 	val &= ~(0xffff << kcontrol->private_value);
2628 	val |= ((255 - (ucontrol->value.integer.value[0] & 0xff)) |
2629 	        ((255 - (ucontrol->value.integer.value[1] & 0xff)) << 8)) << kcontrol->private_value;
2630 	change = val != trident->musicvol_wavevol;
2631 	outl(trident->musicvol_wavevol = val, TRID_REG(trident, T4D_MUSICVOL_WAVEVOL));
2632 	spin_unlock_irq(&trident->reg_lock);
2633 	return change;
2634 }
2635 
2636 static snd_kcontrol_new_t snd_trident_vol_music_control __devinitdata =
2637 {
2638 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2639 	.name =         "Music Playback Volume",
2640 	.info =		snd_trident_vol_control_info,
2641 	.get =		snd_trident_vol_control_get,
2642 	.put =		snd_trident_vol_control_put,
2643 	.private_value = 16,
2644 };
2645 
2646 static snd_kcontrol_new_t snd_trident_vol_wave_control __devinitdata =
2647 {
2648 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2649 	.name =         "Wave Playback Volume",
2650 	.info =		snd_trident_vol_control_info,
2651 	.get =		snd_trident_vol_control_get,
2652 	.put =		snd_trident_vol_control_put,
2653 	.private_value = 0,
2654 };
2655 
2656 /*---------------------------------------------------------------------------
2657     snd_trident_pcm_vol_control
2658 
2659     Description: PCM front volume control
2660   ---------------------------------------------------------------------------*/
2661 
2662 static int snd_trident_pcm_vol_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2663 {
2664 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2665 
2666 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2667 	uinfo->count = 1;
2668 	uinfo->value.integer.min = 0;
2669 	uinfo->value.integer.max = 255;
2670 	if (trident->device == TRIDENT_DEVICE_ID_SI7018)
2671 		uinfo->value.integer.max = 1023;
2672 	return 0;
2673 }
2674 
2675 static int snd_trident_pcm_vol_control_get(snd_kcontrol_t * kcontrol,
2676 					   snd_ctl_elem_value_t * ucontrol)
2677 {
2678 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2679 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2680 
2681 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
2682 		ucontrol->value.integer.value[0] = 1023 - mix->vol;
2683 	} else {
2684 		ucontrol->value.integer.value[0] = 255 - (mix->vol>>2);
2685 	}
2686 	return 0;
2687 }
2688 
2689 static int snd_trident_pcm_vol_control_put(snd_kcontrol_t * kcontrol,
2690 					   snd_ctl_elem_value_t * ucontrol)
2691 {
2692 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2693 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2694 	unsigned int val;
2695 	int change = 0;
2696 
2697 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
2698 		val = 1023 - (ucontrol->value.integer.value[0] & 1023);
2699 	} else {
2700 		val = (255 - (ucontrol->value.integer.value[0] & 255)) << 2;
2701 	}
2702 	spin_lock_irq(&trident->reg_lock);
2703 	change = val != mix->vol;
2704 	mix->vol = val;
2705 	if (mix->voice != NULL)
2706 		snd_trident_write_vol_reg(trident, mix->voice, val);
2707 	spin_unlock_irq(&trident->reg_lock);
2708 	return change;
2709 }
2710 
2711 static snd_kcontrol_new_t snd_trident_pcm_vol_control __devinitdata =
2712 {
2713 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2714 	.name =         "PCM Front Playback Volume",
2715 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2716 	.count =	32,
2717 	.info =		snd_trident_pcm_vol_control_info,
2718 	.get =		snd_trident_pcm_vol_control_get,
2719 	.put =		snd_trident_pcm_vol_control_put,
2720 };
2721 
2722 /*---------------------------------------------------------------------------
2723     snd_trident_pcm_pan_control
2724 
2725     Description: PCM front pan control
2726   ---------------------------------------------------------------------------*/
2727 
2728 static int snd_trident_pcm_pan_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2729 {
2730 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2731 	uinfo->count = 1;
2732 	uinfo->value.integer.min = 0;
2733 	uinfo->value.integer.max = 127;
2734 	return 0;
2735 }
2736 
2737 static int snd_trident_pcm_pan_control_get(snd_kcontrol_t * kcontrol,
2738 					   snd_ctl_elem_value_t * ucontrol)
2739 {
2740 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2741 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2742 
2743 	ucontrol->value.integer.value[0] = mix->pan;
2744 	if (ucontrol->value.integer.value[0] & 0x40) {
2745 		ucontrol->value.integer.value[0] = (0x3f - (ucontrol->value.integer.value[0] & 0x3f));
2746 	} else {
2747 		ucontrol->value.integer.value[0] |= 0x40;
2748 	}
2749 	return 0;
2750 }
2751 
2752 static int snd_trident_pcm_pan_control_put(snd_kcontrol_t * kcontrol,
2753 					   snd_ctl_elem_value_t * ucontrol)
2754 {
2755 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2756 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2757 	unsigned char val;
2758 	int change = 0;
2759 
2760 	if (ucontrol->value.integer.value[0] & 0x40)
2761 		val = ucontrol->value.integer.value[0] & 0x3f;
2762 	else
2763 		val = (0x3f - (ucontrol->value.integer.value[0] & 0x3f)) | 0x40;
2764 	spin_lock_irq(&trident->reg_lock);
2765 	change = val != mix->pan;
2766 	mix->pan = val;
2767 	if (mix->voice != NULL)
2768 		snd_trident_write_pan_reg(trident, mix->voice, val);
2769 	spin_unlock_irq(&trident->reg_lock);
2770 	return change;
2771 }
2772 
2773 static snd_kcontrol_new_t snd_trident_pcm_pan_control __devinitdata =
2774 {
2775 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2776 	.name =         "PCM Pan Playback Control",
2777 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2778 	.count =	32,
2779 	.info =		snd_trident_pcm_pan_control_info,
2780 	.get =		snd_trident_pcm_pan_control_get,
2781 	.put =		snd_trident_pcm_pan_control_put,
2782 };
2783 
2784 /*---------------------------------------------------------------------------
2785     snd_trident_pcm_rvol_control
2786 
2787     Description: PCM reverb volume control
2788   ---------------------------------------------------------------------------*/
2789 
2790 static int snd_trident_pcm_rvol_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2791 {
2792 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2793 	uinfo->count = 1;
2794 	uinfo->value.integer.min = 0;
2795 	uinfo->value.integer.max = 127;
2796 	return 0;
2797 }
2798 
2799 static int snd_trident_pcm_rvol_control_get(snd_kcontrol_t * kcontrol,
2800 					    snd_ctl_elem_value_t * ucontrol)
2801 {
2802 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2803 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2804 
2805 	ucontrol->value.integer.value[0] = 127 - mix->rvol;
2806 	return 0;
2807 }
2808 
2809 static int snd_trident_pcm_rvol_control_put(snd_kcontrol_t * kcontrol,
2810 					    snd_ctl_elem_value_t * ucontrol)
2811 {
2812 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2813 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2814 	unsigned short val;
2815 	int change = 0;
2816 
2817 	val = 0x7f - (ucontrol->value.integer.value[0] & 0x7f);
2818 	spin_lock_irq(&trident->reg_lock);
2819 	change = val != mix->rvol;
2820 	mix->rvol = val;
2821 	if (mix->voice != NULL)
2822 		snd_trident_write_rvol_reg(trident, mix->voice, val);
2823 	spin_unlock_irq(&trident->reg_lock);
2824 	return change;
2825 }
2826 
2827 static snd_kcontrol_new_t snd_trident_pcm_rvol_control __devinitdata =
2828 {
2829 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2830 	.name =         "PCM Reverb Playback Volume",
2831 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2832 	.count = 	32,
2833 	.info =		snd_trident_pcm_rvol_control_info,
2834 	.get =		snd_trident_pcm_rvol_control_get,
2835 	.put =		snd_trident_pcm_rvol_control_put,
2836 };
2837 
2838 /*---------------------------------------------------------------------------
2839     snd_trident_pcm_cvol_control
2840 
2841     Description: PCM chorus volume control
2842   ---------------------------------------------------------------------------*/
2843 
2844 static int snd_trident_pcm_cvol_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2845 {
2846 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2847 	uinfo->count = 1;
2848 	uinfo->value.integer.min = 0;
2849 	uinfo->value.integer.max = 127;
2850 	return 0;
2851 }
2852 
2853 static int snd_trident_pcm_cvol_control_get(snd_kcontrol_t * kcontrol,
2854 					    snd_ctl_elem_value_t * ucontrol)
2855 {
2856 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2857 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2858 
2859 	ucontrol->value.integer.value[0] = 127 - mix->cvol;
2860 	return 0;
2861 }
2862 
2863 static int snd_trident_pcm_cvol_control_put(snd_kcontrol_t * kcontrol,
2864 					    snd_ctl_elem_value_t * ucontrol)
2865 {
2866 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2867 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2868 	unsigned short val;
2869 	int change = 0;
2870 
2871 	val = 0x7f - (ucontrol->value.integer.value[0] & 0x7f);
2872 	spin_lock_irq(&trident->reg_lock);
2873 	change = val != mix->cvol;
2874 	mix->cvol = val;
2875 	if (mix->voice != NULL)
2876 		snd_trident_write_cvol_reg(trident, mix->voice, val);
2877 	spin_unlock_irq(&trident->reg_lock);
2878 	return change;
2879 }
2880 
2881 static snd_kcontrol_new_t snd_trident_pcm_cvol_control __devinitdata =
2882 {
2883 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2884 	.name =         "PCM Chorus Playback Volume",
2885 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2886 	.count =	32,
2887 	.info =		snd_trident_pcm_cvol_control_info,
2888 	.get =		snd_trident_pcm_cvol_control_get,
2889 	.put =		snd_trident_pcm_cvol_control_put,
2890 };
2891 
2892 static void snd_trident_notify_pcm_change1(snd_card_t * card, snd_kcontrol_t *kctl, int num, int activate)
2893 {
2894 	snd_ctl_elem_id_t id;
2895 
2896 	snd_runtime_check(kctl != NULL, return);
2897 	if (activate)
2898 		kctl->vd[num].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
2899 	else
2900 		kctl->vd[num].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
2901 	snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE |
2902 		       SNDRV_CTL_EVENT_MASK_INFO,
2903 		       snd_ctl_build_ioff(&id, kctl, num));
2904 }
2905 
2906 static void snd_trident_notify_pcm_change(trident_t *trident, snd_trident_pcm_mixer_t *tmix, int num, int activate)
2907 {
2908 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_vol, num, activate);
2909 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_pan, num, activate);
2910 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_rvol, num, activate);
2911 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_cvol, num, activate);
2912 }
2913 
2914 static int snd_trident_pcm_mixer_build(trident_t *trident, snd_trident_voice_t *voice, snd_pcm_substream_t *substream)
2915 {
2916 	snd_trident_pcm_mixer_t *tmix;
2917 
2918 	snd_assert(trident != NULL && voice != NULL && substream != NULL, return -EINVAL);
2919 	tmix = &trident->pcm_mixer[substream->number];
2920 	tmix->voice = voice;
2921 	tmix->vol = T4D_DEFAULT_PCM_VOL;
2922 	tmix->pan = T4D_DEFAULT_PCM_PAN;
2923 	tmix->rvol = T4D_DEFAULT_PCM_RVOL;
2924 	tmix->cvol = T4D_DEFAULT_PCM_CVOL;
2925 	snd_trident_notify_pcm_change(trident, tmix, substream->number, 1);
2926 	return 0;
2927 }
2928 
2929 static int snd_trident_pcm_mixer_free(trident_t *trident, snd_trident_voice_t *voice, snd_pcm_substream_t *substream)
2930 {
2931 	snd_trident_pcm_mixer_t *tmix;
2932 
2933 	snd_assert(trident != NULL && substream != NULL, return -EINVAL);
2934 	tmix = &trident->pcm_mixer[substream->number];
2935 	tmix->voice = NULL;
2936 	snd_trident_notify_pcm_change(trident, tmix, substream->number, 0);
2937 	return 0;
2938 }
2939 
2940 /*---------------------------------------------------------------------------
2941    snd_trident_mixer
2942 
2943    Description: This routine registers the 4DWave device for mixer support.
2944 
2945    Paramters:   trident - pointer to target device class for 4DWave.
2946 
2947    Returns:     None
2948 
2949   ---------------------------------------------------------------------------*/
2950 
2951 static int __devinit snd_trident_mixer(trident_t * trident, int pcm_spdif_device)
2952 {
2953 	ac97_template_t _ac97;
2954 	snd_card_t * card = trident->card;
2955 	snd_kcontrol_t *kctl;
2956 	snd_ctl_elem_value_t *uctl;
2957 	int idx, err, retries = 2;
2958 	static ac97_bus_ops_t ops = {
2959 		.write = snd_trident_codec_write,
2960 		.read = snd_trident_codec_read,
2961 	};
2962 
2963 	uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
2964 	if (!uctl)
2965 		return -ENOMEM;
2966 
2967 	if ((err = snd_ac97_bus(trident->card, 0, &ops, NULL, &trident->ac97_bus)) < 0)
2968 		goto __out;
2969 
2970 	memset(&_ac97, 0, sizeof(_ac97));
2971 	_ac97.private_data = trident;
2972 	trident->ac97_detect = 1;
2973 
2974       __again:
2975 	if ((err = snd_ac97_mixer(trident->ac97_bus, &_ac97, &trident->ac97)) < 0) {
2976 		if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
2977 			if ((err = snd_trident_sis_reset(trident)) < 0)
2978 				goto __out;
2979 			if (retries-- > 0)
2980 				goto __again;
2981 			err = -EIO;
2982 		}
2983 		goto __out;
2984 	}
2985 
2986 	/* secondary codec? */
2987 	if (trident->device == TRIDENT_DEVICE_ID_SI7018 &&
2988 	    (inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) & SI_AC97_PRIMARY_READY) != 0) {
2989 		_ac97.num = 1;
2990 		err = snd_ac97_mixer(trident->ac97_bus, &_ac97, &trident->ac97_sec);
2991 		if (err < 0)
2992 			snd_printk("SI7018: the secondary codec - invalid access\n");
2993 #if 0	// only for my testing purpose --jk
2994 		{
2995 			ac97_t *mc97;
2996 			err = snd_ac97_modem(trident->card, &_ac97, &mc97);
2997 			if (err < 0)
2998 				snd_printk("snd_ac97_modem returned error %i\n", err);
2999 		}
3000 #endif
3001 	}
3002 
3003 	trident->ac97_detect = 0;
3004 
3005 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
3006 		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_trident_vol_wave_control, trident))) < 0)
3007 			goto __out;
3008 		kctl->put(kctl, uctl);
3009 		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_trident_vol_music_control, trident))) < 0)
3010 			goto __out;
3011 		kctl->put(kctl, uctl);
3012 		outl(trident->musicvol_wavevol = 0x00000000, TRID_REG(trident, T4D_MUSICVOL_WAVEVOL));
3013 	} else {
3014 		outl(trident->musicvol_wavevol = 0xffff0000, TRID_REG(trident, T4D_MUSICVOL_WAVEVOL));
3015 	}
3016 
3017 	for (idx = 0; idx < 32; idx++) {
3018 		snd_trident_pcm_mixer_t *tmix;
3019 
3020 		tmix = &trident->pcm_mixer[idx];
3021 		tmix->voice = NULL;
3022 	}
3023 	if ((trident->ctl_vol = snd_ctl_new1(&snd_trident_pcm_vol_control, trident)) == NULL)
3024 		goto __nomem;
3025 	if ((err = snd_ctl_add(card, trident->ctl_vol)))
3026 		goto __out;
3027 
3028 	if ((trident->ctl_pan = snd_ctl_new1(&snd_trident_pcm_pan_control, trident)) == NULL)
3029 		goto __nomem;
3030 	if ((err = snd_ctl_add(card, trident->ctl_pan)))
3031 		goto __out;
3032 
3033 	if ((trident->ctl_rvol = snd_ctl_new1(&snd_trident_pcm_rvol_control, trident)) == NULL)
3034 		goto __nomem;
3035 	if ((err = snd_ctl_add(card, trident->ctl_rvol)))
3036 		goto __out;
3037 
3038 	if ((trident->ctl_cvol = snd_ctl_new1(&snd_trident_pcm_cvol_control, trident)) == NULL)
3039 		goto __nomem;
3040 	if ((err = snd_ctl_add(card, trident->ctl_cvol)))
3041 		goto __out;
3042 
3043 	if (trident->device == TRIDENT_DEVICE_ID_NX) {
3044 		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_trident_ac97_rear_control, trident))) < 0)
3045 			goto __out;
3046 		kctl->put(kctl, uctl);
3047 	}
3048 	if (trident->device == TRIDENT_DEVICE_ID_NX || trident->device == TRIDENT_DEVICE_ID_SI7018) {
3049 
3050 		kctl = snd_ctl_new1(&snd_trident_spdif_control, trident);
3051 		if (kctl == NULL) {
3052 			err = -ENOMEM;
3053 			goto __out;
3054 		}
3055 		if (trident->ac97->ext_id & AC97_EI_SPDIF)
3056 			kctl->id.index++;
3057 		if (trident->ac97_sec && (trident->ac97_sec->ext_id & AC97_EI_SPDIF))
3058 			kctl->id.index++;
3059 		idx = kctl->id.index;
3060 		if ((err = snd_ctl_add(card, kctl)) < 0)
3061 			goto __out;
3062 		kctl->put(kctl, uctl);
3063 
3064 		kctl = snd_ctl_new1(&snd_trident_spdif_default, trident);
3065 		if (kctl == NULL) {
3066 			err = -ENOMEM;
3067 			goto __out;
3068 		}
3069 		kctl->id.index = idx;
3070 		kctl->id.device = pcm_spdif_device;
3071 		if ((err = snd_ctl_add(card, kctl)) < 0)
3072 			goto __out;
3073 
3074 		kctl = snd_ctl_new1(&snd_trident_spdif_mask, trident);
3075 		if (kctl == NULL) {
3076 			err = -ENOMEM;
3077 			goto __out;
3078 		}
3079 		kctl->id.index = idx;
3080 		kctl->id.device = pcm_spdif_device;
3081 		if ((err = snd_ctl_add(card, kctl)) < 0)
3082 			goto __out;
3083 
3084 		kctl = snd_ctl_new1(&snd_trident_spdif_stream, trident);
3085 		if (kctl == NULL) {
3086 			err = -ENOMEM;
3087 			goto __out;
3088 		}
3089 		kctl->id.index = idx;
3090 		kctl->id.device = pcm_spdif_device;
3091 		if ((err = snd_ctl_add(card, kctl)) < 0)
3092 			goto __out;
3093 		trident->spdif_pcm_ctl = kctl;
3094 	}
3095 
3096 	err = 0;
3097 	goto __out;
3098 
3099  __nomem:
3100 	err = -ENOMEM;
3101 
3102  __out:
3103 	kfree(uctl);
3104 
3105 	return err;
3106 }
3107 
3108 /*
3109  * gameport interface
3110  */
3111 
3112 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
3113 
3114 static unsigned char snd_trident_gameport_read(struct gameport *gameport)
3115 {
3116 	trident_t *chip = gameport_get_port_data(gameport);
3117 
3118 	snd_assert(chip, return 0);
3119 	return inb(TRID_REG(chip, GAMEPORT_LEGACY));
3120 }
3121 
3122 static void snd_trident_gameport_trigger(struct gameport *gameport)
3123 {
3124 	trident_t *chip = gameport_get_port_data(gameport);
3125 
3126 	snd_assert(chip, return);
3127 	outb(0xff, TRID_REG(chip, GAMEPORT_LEGACY));
3128 }
3129 
3130 static int snd_trident_gameport_cooked_read(struct gameport *gameport, int *axes, int *buttons)
3131 {
3132 	trident_t *chip = gameport_get_port_data(gameport);
3133 	int i;
3134 
3135 	snd_assert(chip, 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 	trident_t *chip = gameport_get_port_data(gameport);
3150 
3151 	snd_assert(chip, return 0);
3152 
3153 	switch (mode) {
3154 		case GAMEPORT_MODE_COOKED:
3155 			outb(GAMEPORT_MODE_ADC, TRID_REG(chip, GAMEPORT_GCR));
3156 			msleep(20);
3157 			return 0;
3158 		case GAMEPORT_MODE_RAW:
3159 			outb(0, TRID_REG(chip, GAMEPORT_GCR));
3160 			return 0;
3161 		default:
3162 			return -1;
3163 	}
3164 }
3165 
3166 int __devinit snd_trident_create_gameport(trident_t *chip)
3167 {
3168 	struct gameport *gp;
3169 
3170 	chip->gameport = gp = gameport_allocate_port();
3171 	if (!gp) {
3172 		printk(KERN_ERR "trident: cannot allocate memory for gameport\n");
3173 		return -ENOMEM;
3174 	}
3175 
3176 	gameport_set_name(gp, "Trident 4DWave");
3177 	gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
3178 	gameport_set_dev_parent(gp, &chip->pci->dev);
3179 
3180 	gameport_set_port_data(gp, chip);
3181 	gp->fuzz = 64;
3182 	gp->read = snd_trident_gameport_read;
3183 	gp->trigger = snd_trident_gameport_trigger;
3184 	gp->cooked_read = snd_trident_gameport_cooked_read;
3185 	gp->open = snd_trident_gameport_open;
3186 
3187 	gameport_register_port(gp);
3188 
3189 	return 0;
3190 }
3191 
3192 static inline void snd_trident_free_gameport(trident_t *chip)
3193 {
3194 	if (chip->gameport) {
3195 		gameport_unregister_port(chip->gameport);
3196 		chip->gameport = NULL;
3197 	}
3198 }
3199 #else
3200 int __devinit snd_trident_create_gameport(trident_t *chip) { return -ENOSYS; }
3201 static inline void snd_trident_free_gameport(trident_t *chip) { }
3202 #endif /* CONFIG_GAMEPORT */
3203 
3204 /*
3205  * delay for 1 tick
3206  */
3207 static inline void do_delay(trident_t *chip)
3208 {
3209 	set_current_state(TASK_UNINTERRUPTIBLE);
3210 	schedule_timeout(1);
3211 }
3212 
3213 /*
3214  *  SiS reset routine
3215  */
3216 
3217 static int snd_trident_sis_reset(trident_t *trident)
3218 {
3219 	unsigned long end_time;
3220 	unsigned int i;
3221 	int r;
3222 
3223 	r = trident->in_suspend ? 0 : 2;	/* count of retries */
3224       __si7018_retry:
3225 	pci_write_config_byte(trident->pci, 0x46, 0x04);	/* SOFTWARE RESET */
3226 	udelay(100);
3227 	pci_write_config_byte(trident->pci, 0x46, 0x00);
3228 	udelay(100);
3229 	/* disable AC97 GPIO interrupt */
3230 	outb(0x00, TRID_REG(trident, SI_AC97_GPIO));
3231 	/* initialize serial interface, force cold reset */
3232 	i = PCMOUT|SURROUT|CENTEROUT|LFEOUT|SECONDARY_ID|COLD_RESET;
3233 	outl(i, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
3234 	udelay(1000);
3235 	/* remove cold reset */
3236 	i &= ~COLD_RESET;
3237 	outl(i, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
3238 	udelay(2000);
3239 	/* wait, until the codec is ready */
3240 	end_time = (jiffies + (HZ * 3) / 4) + 1;
3241 	do {
3242 		if ((inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) & SI_AC97_PRIMARY_READY) != 0)
3243 			goto __si7018_ok;
3244 		do_delay(trident);
3245 	} while (time_after_eq(end_time, jiffies));
3246 	snd_printk("AC'97 codec ready error [0x%x]\n", inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)));
3247 	if (r-- > 0) {
3248 		end_time = jiffies + HZ;
3249 		do {
3250 			do_delay(trident);
3251 		} while (time_after_eq(end_time, jiffies));
3252 		goto __si7018_retry;
3253 	}
3254       __si7018_ok:
3255 	/* wait for the second codec */
3256 	do {
3257 		if ((inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) & SI_AC97_SECONDARY_READY) != 0)
3258 			break;
3259 		do_delay(trident);
3260 	} while (time_after_eq(end_time, jiffies));
3261 	/* enable 64 channel mode */
3262 	outl(BANK_B_EN, TRID_REG(trident, T4D_LFO_GC_CIR));
3263 	return 0;
3264 }
3265 
3266 /*
3267  *  /proc interface
3268  */
3269 
3270 static void snd_trident_proc_read(snd_info_entry_t *entry,
3271 				  snd_info_buffer_t * buffer)
3272 {
3273 	trident_t *trident = entry->private_data;
3274 	char *s;
3275 
3276 	switch (trident->device) {
3277 	case TRIDENT_DEVICE_ID_SI7018:
3278 		s = "SiS 7018 Audio";
3279 		break;
3280 	case TRIDENT_DEVICE_ID_DX:
3281 		s = "Trident 4DWave PCI DX";
3282 		break;
3283 	case TRIDENT_DEVICE_ID_NX:
3284 		s = "Trident 4DWave PCI NX";
3285 		break;
3286 	default:
3287 		s = "???";
3288 	}
3289 	snd_iprintf(buffer, "%s\n\n", s);
3290 	snd_iprintf(buffer, "Spurious IRQs    : %d\n", trident->spurious_irq_count);
3291 	snd_iprintf(buffer, "Spurious IRQ dlta: %d\n", trident->spurious_irq_max_delta);
3292 	if (trident->device == TRIDENT_DEVICE_ID_NX || trident->device == TRIDENT_DEVICE_ID_SI7018)
3293 		snd_iprintf(buffer, "IEC958 Mixer Out : %s\n", trident->spdif_ctrl == 0x28 ? "on" : "off");
3294 	if (trident->device == TRIDENT_DEVICE_ID_NX) {
3295 		snd_iprintf(buffer, "Rear Speakers    : %s\n", trident->ac97_ctrl & 0x00000010 ? "on" : "off");
3296 		if (trident->tlb.entries) {
3297 			snd_iprintf(buffer,"\nVirtual Memory\n");
3298 			snd_iprintf(buffer, "Memory Maximum : %d\n", trident->tlb.memhdr->size);
3299 			snd_iprintf(buffer, "Memory Used    : %d\n", trident->tlb.memhdr->used);
3300 			snd_iprintf(buffer, "Memory Free    : %d\n", snd_util_mem_avail(trident->tlb.memhdr));
3301 		}
3302 	}
3303 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
3304 	snd_iprintf(buffer,"\nWavetable Synth\n");
3305 	snd_iprintf(buffer, "Memory Maximum : %d\n", trident->synth.max_size);
3306 	snd_iprintf(buffer, "Memory Used    : %d\n", trident->synth.current_size);
3307 	snd_iprintf(buffer, "Memory Free    : %d\n", (trident->synth.max_size-trident->synth.current_size));
3308 #endif
3309 }
3310 
3311 static void __devinit snd_trident_proc_init(trident_t * trident)
3312 {
3313 	snd_info_entry_t *entry;
3314 	const char *s = "trident";
3315 
3316 	if (trident->device == TRIDENT_DEVICE_ID_SI7018)
3317 		s = "sis7018";
3318 	if (! snd_card_proc_new(trident->card, s, &entry))
3319 		snd_info_set_text_ops(entry, trident, 1024, snd_trident_proc_read);
3320 }
3321 
3322 static int snd_trident_dev_free(snd_device_t *device)
3323 {
3324 	trident_t *trident = device->device_data;
3325 	return snd_trident_free(trident);
3326 }
3327 
3328 /*---------------------------------------------------------------------------
3329    snd_trident_tlb_alloc
3330 
3331    Description: Allocate and set up the TLB page table on 4D NX.
3332 		Each entry has 4 bytes (physical PCI address).
3333 
3334    Paramters:   trident - pointer to target device class for 4DWave.
3335 
3336    Returns:     0 or negative error code
3337 
3338   ---------------------------------------------------------------------------*/
3339 
3340 static int __devinit snd_trident_tlb_alloc(trident_t *trident)
3341 {
3342 	int i;
3343 
3344 	/* TLB array must be aligned to 16kB !!! so we allocate
3345 	   32kB region and correct offset when necessary */
3346 
3347 	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(trident->pci),
3348 				2 * SNDRV_TRIDENT_MAX_PAGES * 4, &trident->tlb.buffer) < 0) {
3349 		snd_printk(KERN_ERR "trident: unable to allocate TLB buffer\n");
3350 		return -ENOMEM;
3351 	}
3352 	trident->tlb.entries = (unsigned int*)(((unsigned long)trident->tlb.buffer.area + SNDRV_TRIDENT_MAX_PAGES * 4 - 1) & ~(SNDRV_TRIDENT_MAX_PAGES * 4 - 1));
3353 	trident->tlb.entries_dmaaddr = (trident->tlb.buffer.addr + SNDRV_TRIDENT_MAX_PAGES * 4 - 1) & ~(SNDRV_TRIDENT_MAX_PAGES * 4 - 1);
3354 	/* allocate shadow TLB page table (virtual addresses) */
3355 	trident->tlb.shadow_entries = (unsigned long *)vmalloc(SNDRV_TRIDENT_MAX_PAGES*sizeof(unsigned long));
3356 	if (trident->tlb.shadow_entries == NULL) {
3357 		snd_printk(KERN_ERR "trident: unable to allocate shadow TLB entries\n");
3358 		return -ENOMEM;
3359 	}
3360 	/* allocate and setup silent page and initialise TLB entries */
3361 	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(trident->pci),
3362 				SNDRV_TRIDENT_PAGE_SIZE, &trident->tlb.silent_page) < 0) {
3363 		snd_printk(KERN_ERR "trident: unable to allocate silent page\n");
3364 		return -ENOMEM;
3365 	}
3366 	memset(trident->tlb.silent_page.area, 0, SNDRV_TRIDENT_PAGE_SIZE);
3367 	for (i = 0; i < SNDRV_TRIDENT_MAX_PAGES; i++) {
3368 		trident->tlb.entries[i] = cpu_to_le32(trident->tlb.silent_page.addr & ~(SNDRV_TRIDENT_PAGE_SIZE-1));
3369 		trident->tlb.shadow_entries[i] = (unsigned long)trident->tlb.silent_page.area;
3370 	}
3371 
3372 	/* use emu memory block manager code to manage tlb page allocation */
3373 	trident->tlb.memhdr = snd_util_memhdr_new(SNDRV_TRIDENT_PAGE_SIZE * SNDRV_TRIDENT_MAX_PAGES);
3374 	if (trident->tlb.memhdr == NULL)
3375 		return -ENOMEM;
3376 
3377 	trident->tlb.memhdr->block_extra_size = sizeof(snd_trident_memblk_arg_t);
3378 	return 0;
3379 }
3380 
3381 /*
3382  * initialize 4D DX chip
3383  */
3384 
3385 static void snd_trident_stop_all_voices(trident_t *trident)
3386 {
3387 	outl(0xffffffff, TRID_REG(trident, T4D_STOP_A));
3388 	outl(0xffffffff, TRID_REG(trident, T4D_STOP_B));
3389 	outl(0, TRID_REG(trident, T4D_AINTEN_A));
3390 	outl(0, TRID_REG(trident, T4D_AINTEN_B));
3391 }
3392 
3393 static int snd_trident_4d_dx_init(trident_t *trident)
3394 {
3395 	struct pci_dev *pci = trident->pci;
3396 	unsigned long end_time;
3397 
3398 	/* reset the legacy configuration and whole audio/wavetable block */
3399 	pci_write_config_dword(pci, 0x40, 0);	/* DDMA */
3400 	pci_write_config_byte(pci, 0x44, 0);	/* ports */
3401 	pci_write_config_byte(pci, 0x45, 0);	/* Legacy DMA */
3402 	pci_write_config_byte(pci, 0x46, 4); /* reset */
3403 	udelay(100);
3404 	pci_write_config_byte(pci, 0x46, 0); /* release reset */
3405 	udelay(100);
3406 
3407 	/* warm reset of the AC'97 codec */
3408 	outl(0x00000001, TRID_REG(trident, DX_ACR2_AC97_COM_STAT));
3409 	udelay(100);
3410 	outl(0x00000000, TRID_REG(trident, DX_ACR2_AC97_COM_STAT));
3411 	/* DAC on, disable SB IRQ and try to force ADC valid signal */
3412 	trident->ac97_ctrl = 0x0000004a;
3413 	outl(trident->ac97_ctrl, TRID_REG(trident, DX_ACR2_AC97_COM_STAT));
3414 	/* wait, until the codec is ready */
3415 	end_time = (jiffies + (HZ * 3) / 4) + 1;
3416 	do {
3417 		if ((inl(TRID_REG(trident, DX_ACR2_AC97_COM_STAT)) & 0x0010) != 0)
3418 			goto __dx_ok;
3419 		do_delay(trident);
3420 	} while (time_after_eq(end_time, jiffies));
3421 	snd_printk(KERN_ERR "AC'97 codec ready error\n");
3422 	return -EIO;
3423 
3424  __dx_ok:
3425 	snd_trident_stop_all_voices(trident);
3426 
3427 	return 0;
3428 }
3429 
3430 /*
3431  * initialize 4D NX chip
3432  */
3433 static int snd_trident_4d_nx_init(trident_t *trident)
3434 {
3435 	struct pci_dev *pci = trident->pci;
3436 	unsigned long end_time;
3437 
3438 	/* reset the legacy configuration and whole audio/wavetable block */
3439 	pci_write_config_dword(pci, 0x40, 0);	/* DDMA */
3440 	pci_write_config_byte(pci, 0x44, 0);	/* ports */
3441 	pci_write_config_byte(pci, 0x45, 0);	/* Legacy DMA */
3442 
3443 	pci_write_config_byte(pci, 0x46, 1); /* reset */
3444 	udelay(100);
3445 	pci_write_config_byte(pci, 0x46, 0); /* release reset */
3446 	udelay(100);
3447 
3448 	/* warm reset of the AC'97 codec */
3449 	outl(0x00000001, TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
3450 	udelay(100);
3451 	outl(0x00000000, TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
3452 	/* wait, until the codec is ready */
3453 	end_time = (jiffies + (HZ * 3) / 4) + 1;
3454 	do {
3455 		if ((inl(TRID_REG(trident, NX_ACR0_AC97_COM_STAT)) & 0x0008) != 0)
3456 			goto __nx_ok;
3457 		do_delay(trident);
3458 	} while (time_after_eq(end_time, jiffies));
3459 	snd_printk(KERN_ERR "AC'97 codec ready error [0x%x]\n", inl(TRID_REG(trident, NX_ACR0_AC97_COM_STAT)));
3460 	return -EIO;
3461 
3462  __nx_ok:
3463 	/* DAC on */
3464 	trident->ac97_ctrl = 0x00000002;
3465 	outl(trident->ac97_ctrl, TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
3466 	/* disable SB IRQ */
3467 	outl(NX_SB_IRQ_DISABLE, TRID_REG(trident, T4D_MISCINT));
3468 
3469 	snd_trident_stop_all_voices(trident);
3470 
3471 	if (trident->tlb.entries != NULL) {
3472 		unsigned int i;
3473 		/* enable virtual addressing via TLB */
3474 		i = trident->tlb.entries_dmaaddr;
3475 		i |= 0x00000001;
3476 		outl(i, TRID_REG(trident, NX_TLBC));
3477 	} else {
3478 		outl(0, TRID_REG(trident, NX_TLBC));
3479 	}
3480 	/* initialize S/PDIF */
3481 	outl(trident->spdif_bits, TRID_REG(trident, NX_SPCSTATUS));
3482 	outb(trident->spdif_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
3483 
3484 	return 0;
3485 }
3486 
3487 /*
3488  * initialize sis7018 chip
3489  */
3490 static int snd_trident_sis_init(trident_t *trident)
3491 {
3492 	int err;
3493 
3494 	if ((err = snd_trident_sis_reset(trident)) < 0)
3495 		return err;
3496 
3497 	snd_trident_stop_all_voices(trident);
3498 
3499 	/* initialize S/PDIF */
3500 	outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
3501 
3502 	return 0;
3503 }
3504 
3505 /*---------------------------------------------------------------------------
3506    snd_trident_create
3507 
3508    Description: This routine will create the device specific class for
3509                 the 4DWave card. It will also perform basic initialization.
3510 
3511    Paramters:   card  - which card to create
3512                 pci   - interface to PCI bus resource info
3513                 dma1ptr - playback dma buffer
3514                 dma2ptr - capture dma buffer
3515                 irqptr  -  interrupt resource info
3516 
3517    Returns:     4DWave device class private data
3518 
3519   ---------------------------------------------------------------------------*/
3520 
3521 int __devinit snd_trident_create(snd_card_t * card,
3522 		       struct pci_dev *pci,
3523 		       int pcm_streams,
3524 		       int pcm_spdif_device,
3525 		       int max_wavetable_size,
3526 		       trident_t ** rtrident)
3527 {
3528 	trident_t *trident;
3529 	int i, err;
3530 	snd_trident_voice_t *voice;
3531 	snd_trident_pcm_mixer_t *tmix;
3532 	static snd_device_ops_t ops = {
3533 		.dev_free =	snd_trident_dev_free,
3534 	};
3535 
3536 	*rtrident = NULL;
3537 
3538 	/* enable PCI device */
3539 	if ((err = pci_enable_device(pci)) < 0)
3540 		return err;
3541 	/* check, if we can restrict PCI DMA transfers to 30 bits */
3542 	if (pci_set_dma_mask(pci, 0x3fffffff) < 0 ||
3543 	    pci_set_consistent_dma_mask(pci, 0x3fffffff) < 0) {
3544 		snd_printk("architecture does not support 30bit PCI busmaster DMA\n");
3545 		pci_disable_device(pci);
3546 		return -ENXIO;
3547 	}
3548 
3549 	trident = kzalloc(sizeof(*trident), GFP_KERNEL);
3550 	if (trident == NULL) {
3551 		pci_disable_device(pci);
3552 		return -ENOMEM;
3553 	}
3554 	trident->device = (pci->vendor << 16) | pci->device;
3555 	trident->card = card;
3556 	trident->pci = pci;
3557 	spin_lock_init(&trident->reg_lock);
3558 	spin_lock_init(&trident->event_lock);
3559 	spin_lock_init(&trident->voice_alloc);
3560 	if (pcm_streams < 1)
3561 		pcm_streams = 1;
3562 	if (pcm_streams > 32)
3563 		pcm_streams = 32;
3564 	trident->ChanPCM = pcm_streams;
3565 	if (max_wavetable_size < 0 )
3566 		max_wavetable_size = 0;
3567 	trident->synth.max_size = max_wavetable_size * 1024;
3568 	trident->irq = -1;
3569 
3570 	trident->midi_port = TRID_REG(trident, T4D_MPU401_BASE);
3571 	pci_set_master(pci);
3572 
3573 	if ((err = pci_request_regions(pci, "Trident Audio")) < 0) {
3574 		kfree(trident);
3575 		pci_disable_device(pci);
3576 		return err;
3577 	}
3578 	trident->port = pci_resource_start(pci, 0);
3579 
3580 	if (request_irq(pci->irq, snd_trident_interrupt, SA_INTERRUPT|SA_SHIRQ, "Trident Audio", (void *) trident)) {
3581 		snd_printk("unable to grab IRQ %d\n", pci->irq);
3582 		snd_trident_free(trident);
3583 		return -EBUSY;
3584 	}
3585 	trident->irq = pci->irq;
3586 
3587 	/* allocate 16k-aligned TLB for NX cards */
3588 	trident->tlb.entries = NULL;
3589 	trident->tlb.buffer.area = NULL;
3590 	if (trident->device == TRIDENT_DEVICE_ID_NX) {
3591 		if ((err = snd_trident_tlb_alloc(trident)) < 0) {
3592 			snd_trident_free(trident);
3593 			return err;
3594 		}
3595 	}
3596 
3597 	trident->spdif_bits = trident->spdif_pcm_bits = SNDRV_PCM_DEFAULT_CON_SPDIF;
3598 
3599 	/* initialize chip */
3600 	switch (trident->device) {
3601 	case TRIDENT_DEVICE_ID_DX:
3602 		err = snd_trident_4d_dx_init(trident);
3603 		break;
3604 	case TRIDENT_DEVICE_ID_NX:
3605 		err = snd_trident_4d_nx_init(trident);
3606 		break;
3607 	case TRIDENT_DEVICE_ID_SI7018:
3608 		err = snd_trident_sis_init(trident);
3609 		break;
3610 	default:
3611 		snd_BUG();
3612 		break;
3613 	}
3614 	if (err < 0) {
3615 		snd_trident_free(trident);
3616 		return err;
3617 	}
3618 
3619 	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, trident, &ops)) < 0) {
3620 		snd_trident_free(trident);
3621 		return err;
3622 	}
3623 
3624 	if ((err = snd_trident_mixer(trident, pcm_spdif_device)) < 0)
3625 		return err;
3626 
3627 	/* initialise synth voices */
3628 	for (i = 0; i < 64; i++) {
3629 		voice = &trident->synth.voices[i];
3630 		voice->number = i;
3631 		voice->trident = trident;
3632 	}
3633 	/* initialize pcm mixer entries */
3634 	for (i = 0; i < 32; i++) {
3635 		tmix = &trident->pcm_mixer[i];
3636 		tmix->vol = T4D_DEFAULT_PCM_VOL;
3637 		tmix->pan = T4D_DEFAULT_PCM_PAN;
3638 		tmix->rvol = T4D_DEFAULT_PCM_RVOL;
3639 		tmix->cvol = T4D_DEFAULT_PCM_CVOL;
3640 	}
3641 
3642 	snd_trident_enable_eso(trident);
3643 
3644 
3645 	snd_card_set_pm_callback(card, snd_trident_suspend, snd_trident_resume, trident);
3646 	snd_trident_proc_init(trident);
3647 	snd_card_set_dev(card, &pci->dev);
3648 	*rtrident = trident;
3649 	return 0;
3650 }
3651 
3652 /*---------------------------------------------------------------------------
3653    snd_trident_free
3654 
3655    Description: This routine will free the device specific class for
3656                 the 4DWave card.
3657 
3658    Paramters:   trident  - device specific private data for 4DWave card
3659 
3660    Returns:     None.
3661 
3662   ---------------------------------------------------------------------------*/
3663 
3664 static int snd_trident_free(trident_t *trident)
3665 {
3666 	snd_trident_free_gameport(trident);
3667 	snd_trident_disable_eso(trident);
3668 	// Disable S/PDIF out
3669 	if (trident->device == TRIDENT_DEVICE_ID_NX)
3670 		outb(0x00, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
3671 	else if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
3672 		outl(0, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
3673 	}
3674 	if (trident->tlb.buffer.area) {
3675 		outl(0, TRID_REG(trident, NX_TLBC));
3676 		if (trident->tlb.memhdr)
3677 			snd_util_memhdr_free(trident->tlb.memhdr);
3678 		if (trident->tlb.silent_page.area)
3679 			snd_dma_free_pages(&trident->tlb.silent_page);
3680 		vfree(trident->tlb.shadow_entries);
3681 		snd_dma_free_pages(&trident->tlb.buffer);
3682 	}
3683 	if (trident->irq >= 0)
3684 		free_irq(trident->irq, (void *)trident);
3685 	pci_release_regions(trident->pci);
3686 	pci_disable_device(trident->pci);
3687 	kfree(trident);
3688 	return 0;
3689 }
3690 
3691 /*---------------------------------------------------------------------------
3692    snd_trident_interrupt
3693 
3694    Description: ISR for Trident 4DWave device
3695 
3696    Paramters:   trident  - device specific private data for 4DWave card
3697 
3698    Problems:    It seems that Trident chips generates interrupts more than
3699                 one time in special cases. The spurious interrupts are
3700                 detected via sample timer (T4D_STIMER) and computing
3701                 corresponding delta value. The limits are detected with
3702                 the method try & fail so it is possible that it won't
3703                 work on all computers. [jaroslav]
3704 
3705    Returns:     None.
3706 
3707   ---------------------------------------------------------------------------*/
3708 
3709 static irqreturn_t snd_trident_interrupt(int irq, void *dev_id, struct pt_regs *regs)
3710 {
3711 	trident_t *trident = dev_id;
3712 	unsigned int audio_int, chn_int, stimer, channel, mask, tmp;
3713 	int delta;
3714 	snd_trident_voice_t *voice;
3715 
3716 	audio_int = inl(TRID_REG(trident, T4D_MISCINT));
3717 	if ((audio_int & (ADDRESS_IRQ|MPU401_IRQ)) == 0)
3718 		return IRQ_NONE;
3719 	if (audio_int & ADDRESS_IRQ) {
3720 		// get interrupt status for all channels
3721 		spin_lock(&trident->reg_lock);
3722 		stimer = inl(TRID_REG(trident, T4D_STIMER)) & 0x00ffffff;
3723 		chn_int = inl(TRID_REG(trident, T4D_AINT_A));
3724 		if (chn_int == 0)
3725 			goto __skip1;
3726 		outl(chn_int, TRID_REG(trident, T4D_AINT_A));	/* ack */
3727 	      __skip1:
3728 		chn_int = inl(TRID_REG(trident, T4D_AINT_B));
3729 		if (chn_int == 0)
3730 			goto __skip2;
3731 		for (channel = 63; channel >= 32; channel--) {
3732 			mask = 1 << (channel&0x1f);
3733 			if ((chn_int & mask) == 0)
3734 				continue;
3735 			voice = &trident->synth.voices[channel];
3736 			if (!voice->pcm || voice->substream == NULL) {
3737 				outl(mask, TRID_REG(trident, T4D_STOP_B));
3738 				continue;
3739 			}
3740 			delta = (int)stimer - (int)voice->stimer;
3741 			if (delta < 0)
3742 				delta = -delta;
3743 			if ((unsigned int)delta < voice->spurious_threshold) {
3744 				/* do some statistics here */
3745 				trident->spurious_irq_count++;
3746 				if (trident->spurious_irq_max_delta < (unsigned int)delta)
3747 					trident->spurious_irq_max_delta = delta;
3748 				continue;
3749 			}
3750 			voice->stimer = stimer;
3751 			if (voice->isync) {
3752 				if (!voice->isync3) {
3753 					tmp = inw(TRID_REG(trident, T4D_SBBL_SBCL));
3754 					if (trident->bDMAStart & 0x40)
3755 						tmp >>= 1;
3756 					if (tmp > 0)
3757 						tmp = voice->isync_max - tmp;
3758 				} else {
3759 					tmp = inl(TRID_REG(trident, NX_SPCTRL_SPCSO)) & 0x00ffffff;
3760 				}
3761 				if (tmp < voice->isync_mark) {
3762 					if (tmp > 0x10)
3763 						tmp = voice->isync_ESO - 7;
3764 					else
3765 						tmp = voice->isync_ESO + 2;
3766 					/* update ESO for IRQ voice to preserve sync */
3767 					snd_trident_stop_voice(trident, voice->number);
3768 					snd_trident_write_eso_reg(trident, voice, tmp);
3769 					snd_trident_start_voice(trident, voice->number);
3770 				}
3771 			} else if (voice->isync2) {
3772 				voice->isync2 = 0;
3773 				/* write original ESO and update CSO for IRQ voice to preserve sync */
3774 				snd_trident_stop_voice(trident, voice->number);
3775 				snd_trident_write_cso_reg(trident, voice, voice->isync_mark);
3776 				snd_trident_write_eso_reg(trident, voice, voice->ESO);
3777 				snd_trident_start_voice(trident, voice->number);
3778 			}
3779 #if 0
3780 			if (voice->extra) {
3781 				/* update CSO for extra voice to preserve sync */
3782 				snd_trident_stop_voice(trident, voice->extra->number);
3783 				snd_trident_write_cso_reg(trident, voice->extra, 0);
3784 				snd_trident_start_voice(trident, voice->extra->number);
3785 			}
3786 #endif
3787 			spin_unlock(&trident->reg_lock);
3788 			snd_pcm_period_elapsed(voice->substream);
3789 			spin_lock(&trident->reg_lock);
3790 		}
3791 		outl(chn_int, TRID_REG(trident, T4D_AINT_B));	/* ack */
3792 	      __skip2:
3793 		spin_unlock(&trident->reg_lock);
3794 	}
3795 	if (audio_int & MPU401_IRQ) {
3796 		if (trident->rmidi) {
3797 			snd_mpu401_uart_interrupt(irq, trident->rmidi->private_data, regs);
3798 		} else {
3799 			inb(TRID_REG(trident, T4D_MPUR0));
3800 		}
3801 	}
3802 	// outl((ST_TARGET_REACHED | MIXER_OVERFLOW | MIXER_UNDERFLOW), TRID_REG(trident, T4D_MISCINT));
3803 	return IRQ_HANDLED;
3804 }
3805 
3806 /*---------------------------------------------------------------------------
3807    snd_trident_attach_synthesizer
3808 
3809    Description: Attach synthesizer hooks
3810 
3811    Paramters:   trident  - device specific private data for 4DWave card
3812 
3813    Returns:     None.
3814 
3815   ---------------------------------------------------------------------------*/
3816 int snd_trident_attach_synthesizer(trident_t *trident)
3817 {
3818 #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE))
3819 	if (snd_seq_device_new(trident->card, 1, SNDRV_SEQ_DEV_ID_TRIDENT,
3820 			       sizeof(trident_t*), &trident->seq_dev) >= 0) {
3821 		strcpy(trident->seq_dev->name, "4DWave");
3822 		*(trident_t**)SNDRV_SEQ_DEVICE_ARGPTR(trident->seq_dev) = trident;
3823 	}
3824 #endif
3825 	return 0;
3826 }
3827 
3828 snd_trident_voice_t *snd_trident_alloc_voice(trident_t * trident, int type, int client, int port)
3829 {
3830 	snd_trident_voice_t *pvoice;
3831 	unsigned long flags;
3832 	int idx;
3833 
3834 	spin_lock_irqsave(&trident->voice_alloc, flags);
3835 	if (type == SNDRV_TRIDENT_VOICE_TYPE_PCM) {
3836 		idx = snd_trident_allocate_pcm_channel(trident);
3837 		if(idx < 0) {
3838 			spin_unlock_irqrestore(&trident->voice_alloc, flags);
3839 			return NULL;
3840 		}
3841 		pvoice = &trident->synth.voices[idx];
3842 		pvoice->use = 1;
3843 		pvoice->pcm = 1;
3844 		pvoice->capture = 0;
3845 		pvoice->spdif = 0;
3846 		pvoice->memblk = NULL;
3847 		pvoice->substream = NULL;
3848 		spin_unlock_irqrestore(&trident->voice_alloc, flags);
3849 		return pvoice;
3850 	}
3851 	if (type == SNDRV_TRIDENT_VOICE_TYPE_SYNTH) {
3852 		idx = snd_trident_allocate_synth_channel(trident);
3853 		if(idx < 0) {
3854 			spin_unlock_irqrestore(&trident->voice_alloc, flags);
3855 			return NULL;
3856 		}
3857 		pvoice = &trident->synth.voices[idx];
3858 		pvoice->use = 1;
3859 		pvoice->synth = 1;
3860 		pvoice->client = client;
3861 		pvoice->port = port;
3862 		pvoice->memblk = NULL;
3863 		spin_unlock_irqrestore(&trident->voice_alloc, flags);
3864 		return pvoice;
3865 	}
3866 	if (type == SNDRV_TRIDENT_VOICE_TYPE_MIDI) {
3867 	}
3868 	spin_unlock_irqrestore(&trident->voice_alloc, flags);
3869 	return NULL;
3870 }
3871 
3872 void snd_trident_free_voice(trident_t * trident, snd_trident_voice_t *voice)
3873 {
3874 	unsigned long flags;
3875 	void (*private_free)(snd_trident_voice_t *);
3876 	void *private_data;
3877 
3878 	if (voice == NULL || !voice->use)
3879 		return;
3880 	snd_trident_clear_voices(trident, voice->number, voice->number);
3881 	spin_lock_irqsave(&trident->voice_alloc, flags);
3882 	private_free = voice->private_free;
3883 	private_data = voice->private_data;
3884 	voice->private_free = NULL;
3885 	voice->private_data = NULL;
3886 	if (voice->pcm)
3887 		snd_trident_free_pcm_channel(trident, voice->number);
3888 	if (voice->synth)
3889 		snd_trident_free_synth_channel(trident, voice->number);
3890 	voice->use = voice->pcm = voice->synth = voice->midi = 0;
3891 	voice->capture = voice->spdif = 0;
3892 	voice->sample_ops = NULL;
3893 	voice->substream = NULL;
3894 	voice->extra = NULL;
3895 	spin_unlock_irqrestore(&trident->voice_alloc, flags);
3896 	if (private_free)
3897 		private_free(voice);
3898 }
3899 
3900 static void snd_trident_clear_voices(trident_t * trident, unsigned short v_min, unsigned short v_max)
3901 {
3902 	unsigned int i, val, mask[2] = { 0, 0 };
3903 
3904 	snd_assert(v_min <= 63, return);
3905 	snd_assert(v_max <= 63, return);
3906 	for (i = v_min; i <= v_max; i++)
3907 		mask[i >> 5] |= 1 << (i & 0x1f);
3908 	if (mask[0]) {
3909 		outl(mask[0], TRID_REG(trident, T4D_STOP_A));
3910 		val = inl(TRID_REG(trident, T4D_AINTEN_A));
3911 		outl(val & ~mask[0], TRID_REG(trident, T4D_AINTEN_A));
3912 	}
3913 	if (mask[1]) {
3914 		outl(mask[1], TRID_REG(trident, T4D_STOP_B));
3915 		val = inl(TRID_REG(trident, T4D_AINTEN_B));
3916 		outl(val & ~mask[1], TRID_REG(trident, T4D_AINTEN_B));
3917 	}
3918 }
3919 
3920 #ifdef CONFIG_PM
3921 static int snd_trident_suspend(snd_card_t *card, pm_message_t state)
3922 {
3923 	trident_t *trident = card->pm_private_data;
3924 
3925 	trident->in_suspend = 1;
3926 	snd_pcm_suspend_all(trident->pcm);
3927 	if (trident->foldback)
3928 		snd_pcm_suspend_all(trident->foldback);
3929 	if (trident->spdif)
3930 		snd_pcm_suspend_all(trident->spdif);
3931 
3932 	snd_ac97_suspend(trident->ac97);
3933 	if (trident->ac97_sec)
3934 		snd_ac97_suspend(trident->ac97_sec);
3935 
3936 	switch (trident->device) {
3937 	case TRIDENT_DEVICE_ID_DX:
3938 	case TRIDENT_DEVICE_ID_NX:
3939 		break;			/* TODO */
3940 	case TRIDENT_DEVICE_ID_SI7018:
3941 		break;
3942 	}
3943 	pci_disable_device(trident->pci);
3944 	return 0;
3945 }
3946 
3947 static int snd_trident_resume(snd_card_t *card)
3948 {
3949 	trident_t *trident = card->pm_private_data;
3950 
3951 	pci_enable_device(trident->pci);
3952 	if (pci_set_dma_mask(trident->pci, 0x3fffffff) < 0 ||
3953 	    pci_set_consistent_dma_mask(trident->pci, 0x3fffffff) < 0)
3954 		snd_printk(KERN_WARNING "trident: can't set the proper DMA mask\n");
3955 	pci_set_master(trident->pci); /* to be sure */
3956 
3957 	switch (trident->device) {
3958 	case TRIDENT_DEVICE_ID_DX:
3959 		snd_trident_4d_dx_init(trident);
3960 		break;
3961 	case TRIDENT_DEVICE_ID_NX:
3962 		snd_trident_4d_nx_init(trident);
3963 		break;
3964 	case TRIDENT_DEVICE_ID_SI7018:
3965 		snd_trident_sis_init(trident);
3966 		break;
3967 	}
3968 
3969 	snd_ac97_resume(trident->ac97);
3970 	if (trident->ac97_sec)
3971 		snd_ac97_resume(trident->ac97_sec);
3972 
3973 	/* restore some registers */
3974 	outl(trident->musicvol_wavevol, TRID_REG(trident, T4D_MUSICVOL_WAVEVOL));
3975 
3976 	snd_trident_enable_eso(trident);
3977 
3978 	trident->in_suspend = 0;
3979 	return 0;
3980 }
3981 #endif /* CONFIG_PM */
3982 
3983 EXPORT_SYMBOL(snd_trident_alloc_voice);
3984 EXPORT_SYMBOL(snd_trident_free_voice);
3985 EXPORT_SYMBOL(snd_trident_start_voice);
3986 EXPORT_SYMBOL(snd_trident_stop_voice);
3987 EXPORT_SYMBOL(snd_trident_write_voice_regs);
3988 /* trident_memory.c symbols */
3989 EXPORT_SYMBOL(snd_trident_synth_alloc);
3990 EXPORT_SYMBOL(snd_trident_synth_free);
3991 EXPORT_SYMBOL(snd_trident_synth_copy_from_user);
3992