xref: /openbmc/linux/sound/pci/trident/trident_main.c (revision 1da177e4)
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 	}
476 
477 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
478 	outl(regs[0], TRID_REG(trident, CH_START + 0));
479 	outl(regs[1], TRID_REG(trident, CH_START + 4));
480 	outl(regs[2], TRID_REG(trident, CH_START + 8));
481 	outl(regs[3], TRID_REG(trident, CH_START + 12));
482 	outl(regs[4], TRID_REG(trident, CH_START + 16));
483 
484 #if 0
485 	printk("written %i channel:\n", voice->number);
486 	printk("  regs[0] = 0x%x/0x%x\n", regs[0], inl(TRID_REG(trident, CH_START + 0)));
487 	printk("  regs[1] = 0x%x/0x%x\n", regs[1], inl(TRID_REG(trident, CH_START + 4)));
488 	printk("  regs[2] = 0x%x/0x%x\n", regs[2], inl(TRID_REG(trident, CH_START + 8)));
489 	printk("  regs[3] = 0x%x/0x%x\n", regs[3], inl(TRID_REG(trident, CH_START + 12)));
490 	printk("  regs[4] = 0x%x/0x%x\n", regs[4], inl(TRID_REG(trident, CH_START + 16)));
491 #endif
492 }
493 
494 /*---------------------------------------------------------------------------
495    snd_trident_write_cso_reg
496 
497    Description: This routine will write the new CSO offset
498                 register to hardware.
499 
500    Paramters:   trident - pointer to target device class for 4DWave.
501                 voice - synthesizer voice structure
502                 CSO - new CSO value
503 
504   ---------------------------------------------------------------------------*/
505 
506 static void snd_trident_write_cso_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int CSO)
507 {
508 	voice->CSO = CSO;
509 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
510 	if (trident->device != TRIDENT_DEVICE_ID_NX) {
511 		outw(voice->CSO, TRID_REG(trident, CH_DX_CSO_ALPHA_FMS) + 2);
512 	} else {
513 		outl((voice->Delta << 24) | (voice->CSO & 0x00ffffff), TRID_REG(trident, CH_NX_DELTA_CSO));
514 	}
515 }
516 
517 /*---------------------------------------------------------------------------
518    snd_trident_write_eso_reg
519 
520    Description: This routine will write the new ESO offset
521                 register to hardware.
522 
523    Paramters:   trident - pointer to target device class for 4DWave.
524                 voice - synthesizer voice structure
525                 ESO - new ESO value
526 
527   ---------------------------------------------------------------------------*/
528 
529 static void snd_trident_write_eso_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int ESO)
530 {
531 	voice->ESO = ESO;
532 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
533 	if (trident->device != TRIDENT_DEVICE_ID_NX) {
534 		outw(voice->ESO, TRID_REG(trident, CH_DX_ESO_DELTA) + 2);
535 	} else {
536 		outl(((voice->Delta << 16) & 0xff000000) | (voice->ESO & 0x00ffffff), TRID_REG(trident, CH_NX_DELTA_ESO));
537 	}
538 }
539 
540 /*---------------------------------------------------------------------------
541    snd_trident_write_vol_reg
542 
543    Description: This routine will write the new voice volume
544                 register to hardware.
545 
546    Paramters:   trident - pointer to target device class for 4DWave.
547                 voice - synthesizer voice structure
548                 Vol - new voice volume
549 
550   ---------------------------------------------------------------------------*/
551 
552 static void snd_trident_write_vol_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int Vol)
553 {
554 	voice->Vol = Vol;
555 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
556 	switch (trident->device) {
557 	case TRIDENT_DEVICE_ID_DX:
558 	case TRIDENT_DEVICE_ID_NX:
559 		outb(voice->Vol >> 2, TRID_REG(trident, CH_GVSEL_PAN_VOL_CTRL_EC + 2));
560 		break;
561 	case TRIDENT_DEVICE_ID_SI7018:
562 		// printk("voice->Vol = 0x%x\n", voice->Vol);
563 		outw((voice->CTRL << 12) | voice->Vol, TRID_REG(trident, CH_GVSEL_PAN_VOL_CTRL_EC));
564 		break;
565 	}
566 }
567 
568 /*---------------------------------------------------------------------------
569    snd_trident_write_pan_reg
570 
571    Description: This routine will write the new voice pan
572                 register to hardware.
573 
574    Paramters:   trident - pointer to target device class for 4DWave.
575                 voice - synthesizer voice structure
576                 Pan - new pan value
577 
578   ---------------------------------------------------------------------------*/
579 
580 static void snd_trident_write_pan_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int Pan)
581 {
582 	voice->Pan = Pan;
583 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
584 	outb(((voice->GVSel & 0x01) << 7) | (voice->Pan & 0x7f), TRID_REG(trident, CH_GVSEL_PAN_VOL_CTRL_EC + 3));
585 }
586 
587 /*---------------------------------------------------------------------------
588    snd_trident_write_rvol_reg
589 
590    Description: This routine will write the new reverb volume
591                 register to hardware.
592 
593    Paramters:   trident - pointer to target device class for 4DWave.
594                 voice - synthesizer voice structure
595                 RVol - new reverb volume
596 
597   ---------------------------------------------------------------------------*/
598 
599 static void snd_trident_write_rvol_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int RVol)
600 {
601 	voice->RVol = RVol;
602 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
603 	outw(((voice->FMC & 0x0003) << 14) | ((voice->RVol & 0x007f) << 7) | (voice->CVol & 0x007f),
604 	     TRID_REG(trident, trident->device == TRIDENT_DEVICE_ID_NX ? CH_NX_ALPHA_FMS_FMC_RVOL_CVOL : CH_DX_FMC_RVOL_CVOL));
605 }
606 
607 /*---------------------------------------------------------------------------
608    snd_trident_write_cvol_reg
609 
610    Description: This routine will write the new chorus volume
611                 register to hardware.
612 
613    Paramters:   trident - pointer to target device class for 4DWave.
614                 voice - synthesizer voice structure
615                 CVol - new chorus volume
616 
617   ---------------------------------------------------------------------------*/
618 
619 static void snd_trident_write_cvol_reg(trident_t * trident, snd_trident_voice_t * voice, unsigned int CVol)
620 {
621 	voice->CVol = CVol;
622 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
623 	outw(((voice->FMC & 0x0003) << 14) | ((voice->RVol & 0x007f) << 7) | (voice->CVol & 0x007f),
624 	     TRID_REG(trident, trident->device == TRIDENT_DEVICE_ID_NX ? CH_NX_ALPHA_FMS_FMC_RVOL_CVOL : CH_DX_FMC_RVOL_CVOL));
625 }
626 
627 /*---------------------------------------------------------------------------
628    snd_trident_convert_rate
629 
630    Description: This routine converts rate in HZ to hardware delta value.
631 
632    Paramters:   trident - pointer to target device class for 4DWave.
633                 rate - Real or Virtual channel number.
634 
635    Returns:     Delta value.
636 
637   ---------------------------------------------------------------------------*/
638 static unsigned int snd_trident_convert_rate(unsigned int rate)
639 {
640 	unsigned int delta;
641 
642 	// We special case 44100 and 8000 since rounding with the equation
643 	// does not give us an accurate enough value. For 11025 and 22050
644 	// the equation gives us the best answer. All other frequencies will
645 	// also use the equation. JDW
646 	if (rate == 44100)
647 		delta = 0xeb3;
648 	else if (rate == 8000)
649 		delta = 0x2ab;
650 	else if (rate == 48000)
651 		delta = 0x1000;
652 	else
653 		delta = (((rate << 12) + 24000) / 48000) & 0x0000ffff;
654 	return delta;
655 }
656 
657 /*---------------------------------------------------------------------------
658    snd_trident_convert_adc_rate
659 
660    Description: This routine converts rate in HZ to hardware delta value.
661 
662    Paramters:   trident - pointer to target device class for 4DWave.
663                 rate - Real or Virtual channel number.
664 
665    Returns:     Delta value.
666 
667   ---------------------------------------------------------------------------*/
668 static unsigned int snd_trident_convert_adc_rate(unsigned int rate)
669 {
670 	unsigned int delta;
671 
672 	// We special case 44100 and 8000 since rounding with the equation
673 	// does not give us an accurate enough value. For 11025 and 22050
674 	// the equation gives us the best answer. All other frequencies will
675 	// also use the equation. JDW
676 	if (rate == 44100)
677 		delta = 0x116a;
678 	else if (rate == 8000)
679 		delta = 0x6000;
680 	else if (rate == 48000)
681 		delta = 0x1000;
682 	else
683 		delta = ((48000 << 12) / rate) & 0x0000ffff;
684 	return delta;
685 }
686 
687 /*---------------------------------------------------------------------------
688    snd_trident_spurious_threshold
689 
690    Description: This routine converts rate in HZ to spurious threshold.
691 
692    Paramters:   trident - pointer to target device class for 4DWave.
693                 rate - Real or Virtual channel number.
694 
695    Returns:     Delta value.
696 
697   ---------------------------------------------------------------------------*/
698 static unsigned int snd_trident_spurious_threshold(unsigned int rate, unsigned int period_size)
699 {
700 	unsigned int res = (rate * period_size) / 48000;
701 	if (res < 64)
702 		res = res / 2;
703 	else
704 		res -= 32;
705 	return res;
706 }
707 
708 /*---------------------------------------------------------------------------
709    snd_trident_control_mode
710 
711    Description: This routine returns a control mode for a PCM channel.
712 
713    Paramters:   trident - pointer to target device class for 4DWave.
714                 substream  - PCM substream
715 
716    Returns:     Control value.
717 
718   ---------------------------------------------------------------------------*/
719 static unsigned int snd_trident_control_mode(snd_pcm_substream_t *substream)
720 {
721 	unsigned int CTRL;
722 	snd_pcm_runtime_t *runtime = substream->runtime;
723 
724 	/* set ctrl mode
725 	   CTRL default: 8-bit (unsigned) mono, loop mode enabled
726 	 */
727 	CTRL = 0x00000001;
728 	if (snd_pcm_format_width(runtime->format) == 16)
729 		CTRL |= 0x00000008;	// 16-bit data
730 	if (snd_pcm_format_signed(runtime->format))
731 		CTRL |= 0x00000002;	// signed data
732 	if (runtime->channels > 1)
733 		CTRL |= 0x00000004;	// stereo data
734 	return CTRL;
735 }
736 
737 /*
738  *  PCM part
739  */
740 
741 /*---------------------------------------------------------------------------
742    snd_trident_ioctl
743 
744    Description: Device I/O control handler for playback/capture parameters.
745 
746    Paramters:   substream  - PCM substream class
747                 cmd     - what ioctl message to process
748                 arg     - additional message infoarg
749 
750    Returns:     Error status
751 
752   ---------------------------------------------------------------------------*/
753 
754 static int snd_trident_ioctl(snd_pcm_substream_t * substream,
755 			     unsigned int cmd,
756 			     void *arg)
757 {
758 	/* FIXME: it seems that with small periods the behaviour of
759 	          trident hardware is unpredictable and interrupt generator
760 	          is broken */
761 	return snd_pcm_lib_ioctl(substream, cmd, arg);
762 }
763 
764 /*---------------------------------------------------------------------------
765    snd_trident_allocate_pcm_mem
766 
767    Description: Allocate PCM ring buffer for given substream
768 
769    Parameters:  substream  - PCM substream class
770 		hw_params  - hardware parameters
771 
772    Returns:     Error status
773 
774   ---------------------------------------------------------------------------*/
775 
776 static int snd_trident_allocate_pcm_mem(snd_pcm_substream_t * substream,
777 					snd_pcm_hw_params_t * hw_params)
778 {
779 	trident_t *trident = snd_pcm_substream_chip(substream);
780 	snd_pcm_runtime_t *runtime = substream->runtime;
781 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
782 	int err;
783 
784 	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
785 		return err;
786 	if (trident->tlb.entries) {
787 		if (err > 0) { /* change */
788 			if (voice->memblk)
789 				snd_trident_free_pages(trident, voice->memblk);
790 			voice->memblk = snd_trident_alloc_pages(trident, substream);
791 			if (voice->memblk == NULL)
792 				return -ENOMEM;
793 		}
794 	}
795 	return 0;
796 }
797 
798 /*---------------------------------------------------------------------------
799    snd_trident_allocate_evoice
800 
801    Description: Allocate extra voice as interrupt generator
802 
803    Parameters:  substream  - PCM substream class
804 		hw_params  - hardware parameters
805 
806    Returns:     Error status
807 
808   ---------------------------------------------------------------------------*/
809 
810 static int snd_trident_allocate_evoice(snd_pcm_substream_t * substream,
811 				       snd_pcm_hw_params_t * hw_params)
812 {
813 	trident_t *trident = snd_pcm_substream_chip(substream);
814 	snd_pcm_runtime_t *runtime = substream->runtime;
815 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
816 	snd_trident_voice_t *evoice = voice->extra;
817 
818 	/* voice management */
819 
820 	if (params_buffer_size(hw_params) / 2 != params_period_size(hw_params)) {
821 		if (evoice == NULL) {
822 			evoice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
823 			if (evoice == NULL)
824 				return -ENOMEM;
825 			voice->extra = evoice;
826 			evoice->substream = substream;
827 		}
828 	} else {
829 		if (evoice != NULL) {
830 			snd_trident_free_voice(trident, evoice);
831 			voice->extra = evoice = NULL;
832 		}
833 	}
834 
835 	return 0;
836 }
837 
838 /*---------------------------------------------------------------------------
839    snd_trident_hw_params
840 
841    Description: Set the hardware parameters for the playback device.
842 
843    Parameters:  substream  - PCM substream class
844 		hw_params  - hardware parameters
845 
846    Returns:     Error status
847 
848   ---------------------------------------------------------------------------*/
849 
850 static int snd_trident_hw_params(snd_pcm_substream_t * substream,
851 				 snd_pcm_hw_params_t * hw_params)
852 {
853 	int err;
854 
855 	err = snd_trident_allocate_pcm_mem(substream, hw_params);
856 	if (err >= 0)
857 		err = snd_trident_allocate_evoice(substream, hw_params);
858 	return err;
859 }
860 
861 /*---------------------------------------------------------------------------
862    snd_trident_playback_hw_free
863 
864    Description: Release the hardware resources for the playback device.
865 
866    Parameters:  substream  - PCM substream class
867 
868    Returns:     Error status
869 
870   ---------------------------------------------------------------------------*/
871 
872 static int snd_trident_hw_free(snd_pcm_substream_t * substream)
873 {
874 	trident_t *trident = snd_pcm_substream_chip(substream);
875 	snd_pcm_runtime_t *runtime = substream->runtime;
876 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
877 	snd_trident_voice_t *evoice = voice ? voice->extra : NULL;
878 
879 	if (trident->tlb.entries) {
880 		if (voice && voice->memblk) {
881 			snd_trident_free_pages(trident, voice->memblk);
882 			voice->memblk = NULL;
883 		}
884 	}
885 	snd_pcm_lib_free_pages(substream);
886 	if (evoice != NULL) {
887 		snd_trident_free_voice(trident, evoice);
888 		voice->extra = NULL;
889 	}
890 	return 0;
891 }
892 
893 /*---------------------------------------------------------------------------
894    snd_trident_playback_prepare
895 
896    Description: Prepare playback device for playback.
897 
898    Parameters:  substream  - PCM substream class
899 
900    Returns:     Error status
901 
902   ---------------------------------------------------------------------------*/
903 
904 static int snd_trident_playback_prepare(snd_pcm_substream_t * substream)
905 {
906 	trident_t *trident = snd_pcm_substream_chip(substream);
907 	snd_pcm_runtime_t *runtime = substream->runtime;
908 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
909 	snd_trident_voice_t *evoice = voice->extra;
910 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[substream->number];
911 
912 	spin_lock_irq(&trident->reg_lock);
913 
914 	/* set delta (rate) value */
915 	voice->Delta = snd_trident_convert_rate(runtime->rate);
916 	voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
917 
918 	/* set Loop Begin Address */
919 	if (voice->memblk)
920 		voice->LBA = voice->memblk->offset;
921 	else
922 		voice->LBA = runtime->dma_addr;
923 
924 	voice->CSO = 0;
925 	voice->ESO = runtime->buffer_size - 1;	/* in samples */
926 	voice->CTRL = snd_trident_control_mode(substream);
927 	voice->FMC = 3;
928 	voice->GVSel = 1;
929 	voice->EC = 0;
930 	voice->Alpha = 0;
931 	voice->FMS = 0;
932 	voice->Vol = mix->vol;
933 	voice->RVol = mix->rvol;
934 	voice->CVol = mix->cvol;
935 	voice->Pan = mix->pan;
936 	voice->Attribute = 0;
937 #if 0
938 	voice->Attribute = (1<<(30-16))|(2<<(26-16))|
939 			   (0<<(24-16))|(0x1f<<(19-16));
940 #else
941 	voice->Attribute = 0;
942 #endif
943 
944 	snd_trident_write_voice_regs(trident, voice);
945 
946 	if (evoice != NULL) {
947 		evoice->Delta = voice->Delta;
948 		evoice->spurious_threshold = voice->spurious_threshold;
949 		evoice->LBA = voice->LBA;
950 		evoice->CSO = 0;
951 		evoice->ESO = (runtime->period_size * 2) + 4 - 1; /* in samples */
952 		evoice->CTRL = voice->CTRL;
953 		evoice->FMC = 3;
954 		evoice->GVSel = trident->device == TRIDENT_DEVICE_ID_SI7018 ? 0 : 1;
955 		evoice->EC = 0;
956 		evoice->Alpha = 0;
957 		evoice->FMS = 0;
958 		evoice->Vol = 0x3ff;			/* mute */
959 		evoice->RVol = evoice->CVol = 0x7f;	/* mute */
960 		evoice->Pan = 0x7f;			/* mute */
961 #if 0
962 		evoice->Attribute = (1<<(30-16))|(2<<(26-16))|
963 				    (0<<(24-16))|(0x1f<<(19-16));
964 #else
965 		evoice->Attribute = 0;
966 #endif
967 		snd_trident_write_voice_regs(trident, evoice);
968 		evoice->isync2 = 1;
969 		evoice->isync_mark = runtime->period_size;
970 		evoice->ESO = (runtime->period_size * 2) - 1;
971 	}
972 
973 	spin_unlock_irq(&trident->reg_lock);
974 
975 	return 0;
976 }
977 
978 /*---------------------------------------------------------------------------
979    snd_trident_capture_hw_params
980 
981    Description: Set the hardware parameters for the capture device.
982 
983    Parameters:  substream  - PCM substream class
984 		hw_params  - hardware parameters
985 
986    Returns:     Error status
987 
988   ---------------------------------------------------------------------------*/
989 
990 static int snd_trident_capture_hw_params(snd_pcm_substream_t * substream,
991 					 snd_pcm_hw_params_t * hw_params)
992 {
993 	return snd_trident_allocate_pcm_mem(substream, hw_params);
994 }
995 
996 /*---------------------------------------------------------------------------
997    snd_trident_capture_prepare
998 
999    Description: Prepare capture device for playback.
1000 
1001    Parameters:  substream  - PCM substream class
1002 
1003    Returns:     Error status
1004 
1005   ---------------------------------------------------------------------------*/
1006 
1007 static int snd_trident_capture_prepare(snd_pcm_substream_t * substream)
1008 {
1009 	trident_t *trident = snd_pcm_substream_chip(substream);
1010 	snd_pcm_runtime_t *runtime = substream->runtime;
1011 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1012 	unsigned int val, ESO_bytes;
1013 
1014 	spin_lock_irq(&trident->reg_lock);
1015 
1016 	// Initilize the channel and set channel Mode
1017 	outb(0, TRID_REG(trident, LEGACY_DMAR15));
1018 
1019 	// Set DMA channel operation mode register
1020 	outb(0x54, TRID_REG(trident, LEGACY_DMAR11));
1021 
1022 	// Set channel buffer Address, DMAR0 expects contiguous PCI memory area
1023 	voice->LBA = runtime->dma_addr;
1024 	outl(voice->LBA, TRID_REG(trident, LEGACY_DMAR0));
1025 	if (voice->memblk)
1026 		voice->LBA = voice->memblk->offset;
1027 
1028 	// set ESO
1029 	ESO_bytes = snd_pcm_lib_buffer_bytes(substream) - 1;
1030 	outb((ESO_bytes & 0x00ff0000) >> 16, TRID_REG(trident, LEGACY_DMAR6));
1031 	outw((ESO_bytes & 0x0000ffff), TRID_REG(trident, LEGACY_DMAR4));
1032 	ESO_bytes++;
1033 
1034 	// Set channel sample rate, 4.12 format
1035 	val = (((unsigned int) 48000L << 12) + (runtime->rate/2)) / runtime->rate;
1036 	outw(val, TRID_REG(trident, T4D_SBDELTA_DELTA_R));
1037 
1038 	// Set channel interrupt blk length
1039 	if (snd_pcm_format_width(runtime->format) == 16) {
1040 		val = (unsigned short) ((ESO_bytes >> 1) - 1);
1041 	} else {
1042 		val = (unsigned short) (ESO_bytes - 1);
1043 	}
1044 
1045 	outl((val << 16) | val, TRID_REG(trident, T4D_SBBL_SBCL));
1046 
1047 	// Right now, set format and start to run captureing,
1048 	// continuous run loop enable.
1049 	trident->bDMAStart = 0x19;	// 0001 1001b
1050 
1051 	if (snd_pcm_format_width(runtime->format) == 16)
1052 		trident->bDMAStart |= 0x80;
1053 	if (snd_pcm_format_signed(runtime->format))
1054 		trident->bDMAStart |= 0x20;
1055 	if (runtime->channels > 1)
1056 		trident->bDMAStart |= 0x40;
1057 
1058 	// Prepare capture intr channel
1059 
1060 	voice->Delta = snd_trident_convert_rate(runtime->rate);
1061 	voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
1062 	voice->isync = 1;
1063 	voice->isync_mark = runtime->period_size;
1064 	voice->isync_max = runtime->buffer_size;
1065 
1066 	// Set voice parameters
1067 	voice->CSO = 0;
1068 	voice->ESO = voice->isync_ESO = (runtime->period_size * 2) + 6 - 1;
1069 	voice->CTRL = snd_trident_control_mode(substream);
1070 	voice->FMC = 3;
1071 	voice->RVol = 0x7f;
1072 	voice->CVol = 0x7f;
1073 	voice->GVSel = 1;
1074 	voice->Pan = 0x7f;		/* mute */
1075 	voice->Vol = 0x3ff;		/* mute */
1076 	voice->EC = 0;
1077 	voice->Alpha = 0;
1078 	voice->FMS = 0;
1079 	voice->Attribute = 0;
1080 
1081 	snd_trident_write_voice_regs(trident, voice);
1082 
1083 	spin_unlock_irq(&trident->reg_lock);
1084 	return 0;
1085 }
1086 
1087 /*---------------------------------------------------------------------------
1088    snd_trident_si7018_capture_hw_params
1089 
1090    Description: Set the hardware parameters for the capture device.
1091 
1092    Parameters:  substream  - PCM substream class
1093 		hw_params  - hardware parameters
1094 
1095    Returns:     Error status
1096 
1097   ---------------------------------------------------------------------------*/
1098 
1099 static int snd_trident_si7018_capture_hw_params(snd_pcm_substream_t * substream,
1100 						snd_pcm_hw_params_t * hw_params)
1101 {
1102 	int err;
1103 
1104 	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
1105 		return err;
1106 
1107 	return snd_trident_allocate_evoice(substream, hw_params);
1108 }
1109 
1110 /*---------------------------------------------------------------------------
1111    snd_trident_si7018_capture_hw_free
1112 
1113    Description: Release the hardware resources for the capture device.
1114 
1115    Parameters:  substream  - PCM substream class
1116 
1117    Returns:     Error status
1118 
1119   ---------------------------------------------------------------------------*/
1120 
1121 static int snd_trident_si7018_capture_hw_free(snd_pcm_substream_t * substream)
1122 {
1123 	trident_t *trident = snd_pcm_substream_chip(substream);
1124 	snd_pcm_runtime_t *runtime = substream->runtime;
1125 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1126 	snd_trident_voice_t *evoice = voice ? voice->extra : NULL;
1127 
1128 	snd_pcm_lib_free_pages(substream);
1129 	if (evoice != NULL) {
1130 		snd_trident_free_voice(trident, evoice);
1131 		voice->extra = NULL;
1132 	}
1133 	return 0;
1134 }
1135 
1136 /*---------------------------------------------------------------------------
1137    snd_trident_si7018_capture_prepare
1138 
1139    Description: Prepare capture device for playback.
1140 
1141    Parameters:  substream  - PCM substream class
1142 
1143    Returns:     Error status
1144 
1145   ---------------------------------------------------------------------------*/
1146 
1147 static int snd_trident_si7018_capture_prepare(snd_pcm_substream_t * substream)
1148 {
1149 	trident_t *trident = snd_pcm_substream_chip(substream);
1150 	snd_pcm_runtime_t *runtime = substream->runtime;
1151 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1152 	snd_trident_voice_t *evoice = voice->extra;
1153 
1154 	spin_lock_irq(&trident->reg_lock);
1155 
1156 	voice->LBA = runtime->dma_addr;
1157 	voice->Delta = snd_trident_convert_adc_rate(runtime->rate);
1158 	voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
1159 
1160 	// Set voice parameters
1161 	voice->CSO = 0;
1162 	voice->ESO = runtime->buffer_size - 1;		/* in samples */
1163 	voice->CTRL = snd_trident_control_mode(substream);
1164 	voice->FMC = 0;
1165 	voice->RVol = 0;
1166 	voice->CVol = 0;
1167 	voice->GVSel = 1;
1168 	voice->Pan = T4D_DEFAULT_PCM_PAN;
1169 	voice->Vol = 0;
1170 	voice->EC = 0;
1171 	voice->Alpha = 0;
1172 	voice->FMS = 0;
1173 
1174 	voice->Attribute = (2 << (30-16)) |
1175 			   (2 << (26-16)) |
1176 			   (2 << (24-16)) |
1177 			   (1 << (23-16));
1178 
1179 	snd_trident_write_voice_regs(trident, voice);
1180 
1181 	if (evoice != NULL) {
1182 		evoice->Delta = snd_trident_convert_rate(runtime->rate);
1183 		evoice->spurious_threshold = voice->spurious_threshold;
1184 		evoice->LBA = voice->LBA;
1185 		evoice->CSO = 0;
1186 		evoice->ESO = (runtime->period_size * 2) + 20 - 1; /* in samples, 20 means correction */
1187 		evoice->CTRL = voice->CTRL;
1188 		evoice->FMC = 3;
1189 		evoice->GVSel = 0;
1190 		evoice->EC = 0;
1191 		evoice->Alpha = 0;
1192 		evoice->FMS = 0;
1193 		evoice->Vol = 0x3ff;			/* mute */
1194 		evoice->RVol = evoice->CVol = 0x7f;	/* mute */
1195 		evoice->Pan = 0x7f;			/* mute */
1196 		evoice->Attribute = 0;
1197 		snd_trident_write_voice_regs(trident, evoice);
1198 		evoice->isync2 = 1;
1199 		evoice->isync_mark = runtime->period_size;
1200 		evoice->ESO = (runtime->period_size * 2) - 1;
1201 	}
1202 
1203 	spin_unlock_irq(&trident->reg_lock);
1204 	return 0;
1205 }
1206 
1207 /*---------------------------------------------------------------------------
1208    snd_trident_foldback_prepare
1209 
1210    Description: Prepare foldback capture device for playback.
1211 
1212    Parameters:  substream  - PCM substream class
1213 
1214    Returns:     Error status
1215 
1216   ---------------------------------------------------------------------------*/
1217 
1218 static int snd_trident_foldback_prepare(snd_pcm_substream_t * substream)
1219 {
1220 	trident_t *trident = snd_pcm_substream_chip(substream);
1221 	snd_pcm_runtime_t *runtime = substream->runtime;
1222 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1223 	snd_trident_voice_t *evoice = voice->extra;
1224 
1225 	spin_lock_irq(&trident->reg_lock);
1226 
1227 	/* Set channel buffer Address */
1228 	if (voice->memblk)
1229 		voice->LBA = voice->memblk->offset;
1230 	else
1231 		voice->LBA = runtime->dma_addr;
1232 
1233 	/* set target ESO for channel */
1234 	voice->ESO = runtime->buffer_size - 1;	/* in samples */
1235 
1236 	/* set sample rate */
1237 	voice->Delta = 0x1000;
1238 	voice->spurious_threshold = snd_trident_spurious_threshold(48000, runtime->period_size);
1239 
1240 	voice->CSO = 0;
1241 	voice->CTRL = snd_trident_control_mode(substream);
1242 	voice->FMC = 3;
1243 	voice->RVol = 0x7f;
1244 	voice->CVol = 0x7f;
1245 	voice->GVSel = 1;
1246 	voice->Pan = 0x7f;	/* mute */
1247 	voice->Vol = 0x3ff;	/* mute */
1248 	voice->EC = 0;
1249 	voice->Alpha = 0;
1250 	voice->FMS = 0;
1251 	voice->Attribute = 0;
1252 
1253 	/* set up capture channel */
1254 	outb(((voice->number & 0x3f) | 0x80), TRID_REG(trident, T4D_RCI + voice->foldback_chan));
1255 
1256 	snd_trident_write_voice_regs(trident, voice);
1257 
1258 	if (evoice != NULL) {
1259 		evoice->Delta = voice->Delta;
1260 		evoice->spurious_threshold = voice->spurious_threshold;
1261 		evoice->LBA = voice->LBA;
1262 		evoice->CSO = 0;
1263 		evoice->ESO = (runtime->period_size * 2) + 4 - 1; /* in samples */
1264 		evoice->CTRL = voice->CTRL;
1265 		evoice->FMC = 3;
1266 		evoice->GVSel = trident->device == TRIDENT_DEVICE_ID_SI7018 ? 0 : 1;
1267 		evoice->EC = 0;
1268 		evoice->Alpha = 0;
1269 		evoice->FMS = 0;
1270 		evoice->Vol = 0x3ff;			/* mute */
1271 		evoice->RVol = evoice->CVol = 0x7f;	/* mute */
1272 		evoice->Pan = 0x7f;			/* mute */
1273 		evoice->Attribute = 0;
1274 		snd_trident_write_voice_regs(trident, evoice);
1275 		evoice->isync2 = 1;
1276 		evoice->isync_mark = runtime->period_size;
1277 		evoice->ESO = (runtime->period_size * 2) - 1;
1278 	}
1279 
1280 	spin_unlock_irq(&trident->reg_lock);
1281 	return 0;
1282 }
1283 
1284 /*---------------------------------------------------------------------------
1285    snd_trident_spdif_hw_params
1286 
1287    Description: Set the hardware parameters for the spdif device.
1288 
1289    Parameters:  substream  - PCM substream class
1290 		hw_params  - hardware parameters
1291 
1292    Returns:     Error status
1293 
1294   ---------------------------------------------------------------------------*/
1295 
1296 static int snd_trident_spdif_hw_params(snd_pcm_substream_t * substream,
1297 				       snd_pcm_hw_params_t * hw_params)
1298 {
1299 	trident_t *trident = snd_pcm_substream_chip(substream);
1300 	unsigned int old_bits = 0, change = 0;
1301 	int err;
1302 
1303 	err = snd_trident_allocate_pcm_mem(substream, hw_params);
1304 	if (err < 0)
1305 		return err;
1306 
1307 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
1308 		err = snd_trident_allocate_evoice(substream, hw_params);
1309 		if (err < 0)
1310 			return err;
1311 	}
1312 
1313 	/* prepare SPDIF channel */
1314 	spin_lock_irq(&trident->reg_lock);
1315 	old_bits = trident->spdif_pcm_bits;
1316 	if (old_bits & IEC958_AES0_PROFESSIONAL)
1317 		trident->spdif_pcm_bits &= ~IEC958_AES0_PRO_FS;
1318 	else
1319 		trident->spdif_pcm_bits &= ~(IEC958_AES3_CON_FS << 24);
1320 	if (params_rate(hw_params) >= 48000) {
1321 		trident->spdif_pcm_ctrl = 0x3c;	// 48000 Hz
1322 		trident->spdif_pcm_bits |=
1323 			trident->spdif_bits & IEC958_AES0_PROFESSIONAL ?
1324 				IEC958_AES0_PRO_FS_48000 :
1325 				(IEC958_AES3_CON_FS_48000 << 24);
1326 	}
1327 	else if (params_rate(hw_params) >= 44100) {
1328 		trident->spdif_pcm_ctrl = 0x3e;	// 44100 Hz
1329 		trident->spdif_pcm_bits |=
1330 			trident->spdif_bits & IEC958_AES0_PROFESSIONAL ?
1331 				IEC958_AES0_PRO_FS_44100 :
1332 				(IEC958_AES3_CON_FS_44100 << 24);
1333 	}
1334 	else {
1335 		trident->spdif_pcm_ctrl = 0x3d;	// 32000 Hz
1336 		trident->spdif_pcm_bits |=
1337 			trident->spdif_bits & IEC958_AES0_PROFESSIONAL ?
1338 				IEC958_AES0_PRO_FS_32000 :
1339 				(IEC958_AES3_CON_FS_32000 << 24);
1340 	}
1341 	change = old_bits != trident->spdif_pcm_bits;
1342 	spin_unlock_irq(&trident->reg_lock);
1343 
1344 	if (change)
1345 		snd_ctl_notify(trident->card, SNDRV_CTL_EVENT_MASK_VALUE, &trident->spdif_pcm_ctl->id);
1346 
1347 	return 0;
1348 }
1349 
1350 /*---------------------------------------------------------------------------
1351    snd_trident_spdif_prepare
1352 
1353    Description: Prepare SPDIF device for playback.
1354 
1355    Parameters:  substream  - PCM substream class
1356 
1357    Returns:     Error status
1358 
1359   ---------------------------------------------------------------------------*/
1360 
1361 static int snd_trident_spdif_prepare(snd_pcm_substream_t * substream)
1362 {
1363 	trident_t *trident = snd_pcm_substream_chip(substream);
1364 	snd_pcm_runtime_t *runtime = substream->runtime;
1365 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1366 	snd_trident_voice_t *evoice = voice->extra;
1367 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[substream->number];
1368 	unsigned int RESO, LBAO;
1369 	unsigned int temp;
1370 
1371 	spin_lock_irq(&trident->reg_lock);
1372 
1373 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
1374 
1375 		/* set delta (rate) value */
1376 		voice->Delta = snd_trident_convert_rate(runtime->rate);
1377 		voice->spurious_threshold = snd_trident_spurious_threshold(runtime->rate, runtime->period_size);
1378 
1379 		/* set Loop Back Address */
1380 		LBAO = runtime->dma_addr;
1381 		if (voice->memblk)
1382 			voice->LBA = voice->memblk->offset;
1383 		else
1384 			voice->LBA = LBAO;
1385 
1386 		voice->isync = 1;
1387 		voice->isync3 = 1;
1388 		voice->isync_mark = runtime->period_size;
1389 		voice->isync_max = runtime->buffer_size;
1390 
1391 		/* set target ESO for channel */
1392 		RESO = runtime->buffer_size - 1;
1393 		voice->ESO = voice->isync_ESO = (runtime->period_size * 2) + 6 - 1;
1394 
1395 		/* set ctrl mode */
1396 		voice->CTRL = snd_trident_control_mode(substream);
1397 
1398 		voice->FMC = 3;
1399 		voice->RVol = 0x7f;
1400 		voice->CVol = 0x7f;
1401 		voice->GVSel = 1;
1402 		voice->Pan = 0x7f;
1403 		voice->Vol = 0x3ff;
1404 		voice->EC = 0;
1405 		voice->CSO = 0;
1406 		voice->Alpha = 0;
1407 		voice->FMS = 0;
1408 		voice->Attribute = 0;
1409 
1410 		/* prepare surrogate IRQ channel */
1411 		snd_trident_write_voice_regs(trident, voice);
1412 
1413 		outw((RESO & 0xffff), TRID_REG(trident, NX_SPESO));
1414 		outb((RESO >> 16), TRID_REG(trident, NX_SPESO + 2));
1415 		outl((LBAO & 0xfffffffc), TRID_REG(trident, NX_SPLBA));
1416 		outw((voice->CSO & 0xffff), TRID_REG(trident, NX_SPCTRL_SPCSO));
1417 		outb((voice->CSO >> 16), TRID_REG(trident, NX_SPCTRL_SPCSO + 2));
1418 
1419 		/* set SPDIF setting */
1420 		outb(trident->spdif_pcm_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
1421 		outl(trident->spdif_pcm_bits, TRID_REG(trident, NX_SPCSTATUS));
1422 
1423 	} else {	/* SiS */
1424 
1425 		/* set delta (rate) value */
1426 		voice->Delta = 0x800;
1427 		voice->spurious_threshold = snd_trident_spurious_threshold(48000, runtime->period_size);
1428 
1429 		/* set Loop Begin Address */
1430 		if (voice->memblk)
1431 			voice->LBA = voice->memblk->offset;
1432 		else
1433 			voice->LBA = runtime->dma_addr;
1434 
1435 		voice->CSO = 0;
1436 		voice->ESO = runtime->buffer_size - 1;	/* in samples */
1437 		voice->CTRL = snd_trident_control_mode(substream);
1438 		voice->FMC = 3;
1439 		voice->GVSel = 1;
1440 		voice->EC = 0;
1441 		voice->Alpha = 0;
1442 		voice->FMS = 0;
1443 		voice->Vol = mix->vol;
1444 		voice->RVol = mix->rvol;
1445 		voice->CVol = mix->cvol;
1446 		voice->Pan = mix->pan;
1447 		voice->Attribute = (1<<(30-16))|(7<<(26-16))|
1448 				   (0<<(24-16))|(0<<(19-16));
1449 
1450 		snd_trident_write_voice_regs(trident, voice);
1451 
1452 		if (evoice != NULL) {
1453 			evoice->Delta = voice->Delta;
1454 			evoice->spurious_threshold = voice->spurious_threshold;
1455 			evoice->LBA = voice->LBA;
1456 			evoice->CSO = 0;
1457 			evoice->ESO = (runtime->period_size * 2) + 4 - 1; /* in samples */
1458 			evoice->CTRL = voice->CTRL;
1459 			evoice->FMC = 3;
1460 			evoice->GVSel = trident->device == TRIDENT_DEVICE_ID_SI7018 ? 0 : 1;
1461 			evoice->EC = 0;
1462 			evoice->Alpha = 0;
1463 			evoice->FMS = 0;
1464 			evoice->Vol = 0x3ff;			/* mute */
1465 			evoice->RVol = evoice->CVol = 0x7f;	/* mute */
1466 			evoice->Pan = 0x7f;			/* mute */
1467 			evoice->Attribute = 0;
1468 			snd_trident_write_voice_regs(trident, evoice);
1469 			evoice->isync2 = 1;
1470 			evoice->isync_mark = runtime->period_size;
1471 			evoice->ESO = (runtime->period_size * 2) - 1;
1472 		}
1473 
1474 		outl(trident->spdif_pcm_bits, TRID_REG(trident, SI_SPDIF_CS));
1475 		temp = inl(TRID_REG(trident, T4D_LFO_GC_CIR));
1476 		temp &= ~(1<<19);
1477 		outl(temp, TRID_REG(trident, T4D_LFO_GC_CIR));
1478 		temp = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1479 		temp |= SPDIF_EN;
1480 		outl(temp, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1481 	}
1482 
1483 	spin_unlock_irq(&trident->reg_lock);
1484 
1485 	return 0;
1486 }
1487 
1488 /*---------------------------------------------------------------------------
1489    snd_trident_trigger
1490 
1491    Description: Start/stop devices
1492 
1493    Parameters:  substream  - PCM substream class
1494    		cmd	- trigger command (STOP, GO)
1495 
1496    Returns:     Error status
1497 
1498   ---------------------------------------------------------------------------*/
1499 
1500 static int snd_trident_trigger(snd_pcm_substream_t *substream,
1501 			       int cmd)
1502 
1503 {
1504 	trident_t *trident = snd_pcm_substream_chip(substream);
1505 	struct list_head *pos;
1506 	snd_pcm_substream_t *s;
1507 	unsigned int what, whati, capture_flag, spdif_flag;
1508 	snd_trident_voice_t *voice, *evoice;
1509 	unsigned int val, go;
1510 
1511 	switch (cmd) {
1512 	case SNDRV_PCM_TRIGGER_START:
1513 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1514 	case SNDRV_PCM_TRIGGER_RESUME:
1515 		go = 1;
1516 		break;
1517 	case SNDRV_PCM_TRIGGER_STOP:
1518 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1519 	case SNDRV_PCM_TRIGGER_SUSPEND:
1520 		go = 0;
1521 		break;
1522 	default:
1523 		return -EINVAL;
1524 	}
1525 	what = whati = capture_flag = spdif_flag = 0;
1526 	spin_lock(&trident->reg_lock);
1527 	val = inl(TRID_REG(trident, T4D_STIMER)) & 0x00ffffff;
1528 	snd_pcm_group_for_each(pos, substream) {
1529 		s = snd_pcm_group_substream_entry(pos);
1530 		if ((trident_t *) snd_pcm_substream_chip(s) == trident) {
1531 			voice = (snd_trident_voice_t *) s->runtime->private_data;
1532 			evoice = voice->extra;
1533 			what |= 1 << (voice->number & 0x1f);
1534 			if (evoice == NULL) {
1535 				whati |= 1 << (voice->number & 0x1f);
1536 			} else {
1537 				what |= 1 << (evoice->number & 0x1f);
1538 				whati |= 1 << (evoice->number & 0x1f);
1539 				if (go)
1540 					evoice->stimer = val;
1541 			}
1542 			if (go) {
1543 				voice->running = 1;
1544 				voice->stimer = val;
1545 			} else {
1546 				voice->running = 0;
1547 			}
1548 			snd_pcm_trigger_done(s, substream);
1549 			if (voice->capture)
1550 				capture_flag = 1;
1551 			if (voice->spdif)
1552 				spdif_flag = 1;
1553 		}
1554 	}
1555 	if (spdif_flag) {
1556 		if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
1557 			outl(trident->spdif_pcm_bits, TRID_REG(trident, NX_SPCSTATUS));
1558 			outb(trident->spdif_pcm_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
1559 		} else {
1560 			outl(trident->spdif_pcm_bits, TRID_REG(trident, SI_SPDIF_CS));
1561 			val = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) | SPDIF_EN;
1562 			outl(val, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1563 		}
1564 	}
1565 	if (!go)
1566 		outl(what, TRID_REG(trident, T4D_STOP_B));
1567 	val = inl(TRID_REG(trident, T4D_AINTEN_B));
1568 	if (go) {
1569 		val |= whati;
1570 	} else {
1571 		val &= ~whati;
1572 	}
1573 	outl(val, TRID_REG(trident, T4D_AINTEN_B));
1574 	if (go) {
1575 		outl(what, TRID_REG(trident, T4D_START_B));
1576 
1577 		if (capture_flag && trident->device != TRIDENT_DEVICE_ID_SI7018)
1578 			outb(trident->bDMAStart, TRID_REG(trident, T4D_SBCTRL_SBE2R_SBDD));
1579 	} else {
1580 		if (capture_flag && trident->device != TRIDENT_DEVICE_ID_SI7018)
1581 			outb(0x00, TRID_REG(trident, T4D_SBCTRL_SBE2R_SBDD));
1582 	}
1583 	spin_unlock(&trident->reg_lock);
1584 	return 0;
1585 }
1586 
1587 /*---------------------------------------------------------------------------
1588    snd_trident_playback_pointer
1589 
1590    Description: This routine return the playback position
1591 
1592    Parameters:	substream  - PCM substream class
1593 
1594    Returns:     position of buffer
1595 
1596   ---------------------------------------------------------------------------*/
1597 
1598 static snd_pcm_uframes_t snd_trident_playback_pointer(snd_pcm_substream_t * substream)
1599 {
1600 	trident_t *trident = snd_pcm_substream_chip(substream);
1601 	snd_pcm_runtime_t *runtime = substream->runtime;
1602 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1603 	unsigned int cso;
1604 
1605 	if (!voice->running)
1606 		return 0;
1607 
1608 	spin_lock(&trident->reg_lock);
1609 
1610 	outb(voice->number, TRID_REG(trident, T4D_LFO_GC_CIR));
1611 
1612 	if (trident->device != TRIDENT_DEVICE_ID_NX) {
1613 		cso = inw(TRID_REG(trident, CH_DX_CSO_ALPHA_FMS + 2));
1614 	} else {		// ID_4DWAVE_NX
1615 		cso = (unsigned int) inl(TRID_REG(trident, CH_NX_DELTA_CSO)) & 0x00ffffff;
1616 	}
1617 
1618 	spin_unlock(&trident->reg_lock);
1619 
1620 	if (cso >= runtime->buffer_size)
1621 		cso = 0;
1622 
1623 	return cso;
1624 }
1625 
1626 /*---------------------------------------------------------------------------
1627    snd_trident_capture_pointer
1628 
1629    Description: This routine return the capture position
1630 
1631    Paramters:   pcm1    - PCM device class
1632 
1633    Returns:     position of buffer
1634 
1635   ---------------------------------------------------------------------------*/
1636 
1637 static snd_pcm_uframes_t snd_trident_capture_pointer(snd_pcm_substream_t * substream)
1638 {
1639 	trident_t *trident = snd_pcm_substream_chip(substream);
1640 	snd_pcm_runtime_t *runtime = substream->runtime;
1641 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1642 	unsigned int result;
1643 
1644 	if (!voice->running)
1645 		return 0;
1646 
1647 	result = inw(TRID_REG(trident, T4D_SBBL_SBCL));
1648 	if (runtime->channels > 1)
1649 		result >>= 1;
1650 	if (result > 0)
1651 		result = runtime->buffer_size - result;
1652 
1653 	return result;
1654 }
1655 
1656 /*---------------------------------------------------------------------------
1657    snd_trident_spdif_pointer
1658 
1659    Description: This routine return the SPDIF playback position
1660 
1661    Parameters:	substream  - PCM substream class
1662 
1663    Returns:     position of buffer
1664 
1665   ---------------------------------------------------------------------------*/
1666 
1667 static snd_pcm_uframes_t snd_trident_spdif_pointer(snd_pcm_substream_t * substream)
1668 {
1669 	trident_t *trident = snd_pcm_substream_chip(substream);
1670 	snd_pcm_runtime_t *runtime = substream->runtime;
1671 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1672 	unsigned int result;
1673 
1674 	if (!voice->running)
1675 		return 0;
1676 
1677 	result = inl(TRID_REG(trident, NX_SPCTRL_SPCSO)) & 0x00ffffff;
1678 
1679 	return result;
1680 }
1681 
1682 /*
1683  *  Playback support device description
1684  */
1685 
1686 static snd_pcm_hardware_t snd_trident_playback =
1687 {
1688 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1689 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1690 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1691 				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
1692 	.formats =		(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
1693 				 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
1694 	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
1695 	.rate_min =		4000,
1696 	.rate_max =		48000,
1697 	.channels_min =		1,
1698 	.channels_max =		2,
1699 	.buffer_bytes_max =	(256*1024),
1700 	.period_bytes_min =	64,
1701 	.period_bytes_max =	(256*1024),
1702 	.periods_min =		1,
1703 	.periods_max =		1024,
1704 	.fifo_size =		0,
1705 };
1706 
1707 /*
1708  *  Capture support device description
1709  */
1710 
1711 static snd_pcm_hardware_t snd_trident_capture =
1712 {
1713 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1714 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1715 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1716 				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
1717 	.formats =		(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
1718 				 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
1719 	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
1720 	.rate_min =		4000,
1721 	.rate_max =		48000,
1722 	.channels_min =		1,
1723 	.channels_max =		2,
1724 	.buffer_bytes_max =	(128*1024),
1725 	.period_bytes_min =	64,
1726 	.period_bytes_max =	(128*1024),
1727 	.periods_min =		1,
1728 	.periods_max =		1024,
1729 	.fifo_size =		0,
1730 };
1731 
1732 /*
1733  *  Foldback capture support device description
1734  */
1735 
1736 static snd_pcm_hardware_t snd_trident_foldback =
1737 {
1738 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1739 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1740 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1741 				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
1742 	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
1743 	.rates =		SNDRV_PCM_RATE_48000,
1744 	.rate_min =		48000,
1745 	.rate_max =		48000,
1746 	.channels_min =		2,
1747 	.channels_max =		2,
1748 	.buffer_bytes_max =	(128*1024),
1749 	.period_bytes_min =	64,
1750 	.period_bytes_max =	(128*1024),
1751 	.periods_min =		1,
1752 	.periods_max =		1024,
1753 	.fifo_size =		0,
1754 };
1755 
1756 /*
1757  *  SPDIF playback support device description
1758  */
1759 
1760 static snd_pcm_hardware_t snd_trident_spdif =
1761 {
1762 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1763 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1764 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1765 				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
1766 	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
1767 	.rates =		(SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
1768 				 SNDRV_PCM_RATE_48000),
1769 	.rate_min =		32000,
1770 	.rate_max =		48000,
1771 	.channels_min =		2,
1772 	.channels_max =		2,
1773 	.buffer_bytes_max =	(128*1024),
1774 	.period_bytes_min =	64,
1775 	.period_bytes_max =	(128*1024),
1776 	.periods_min =		1,
1777 	.periods_max =		1024,
1778 	.fifo_size =		0,
1779 };
1780 
1781 static snd_pcm_hardware_t snd_trident_spdif_7018 =
1782 {
1783 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
1784 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
1785 				 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_SYNC_START |
1786 				 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
1787 	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
1788 	.rates =		SNDRV_PCM_RATE_48000,
1789 	.rate_min =		48000,
1790 	.rate_max =		48000,
1791 	.channels_min =		2,
1792 	.channels_max =		2,
1793 	.buffer_bytes_max =	(128*1024),
1794 	.period_bytes_min =	64,
1795 	.period_bytes_max =	(128*1024),
1796 	.periods_min =		1,
1797 	.periods_max =		1024,
1798 	.fifo_size =		0,
1799 };
1800 
1801 static void snd_trident_pcm_free_substream(snd_pcm_runtime_t *runtime)
1802 {
1803 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1804 	trident_t *trident;
1805 
1806 	if (voice) {
1807 		trident = voice->trident;
1808 		snd_trident_free_voice(trident, voice);
1809 	}
1810 }
1811 
1812 static int snd_trident_playback_open(snd_pcm_substream_t * substream)
1813 {
1814 	trident_t *trident = snd_pcm_substream_chip(substream);
1815 	snd_pcm_runtime_t *runtime = substream->runtime;
1816 	snd_trident_voice_t *voice;
1817 
1818 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
1819 	if (voice == NULL)
1820 		return -EAGAIN;
1821 	snd_trident_pcm_mixer_build(trident, voice, substream);
1822 	voice->substream = substream;
1823 	runtime->private_data = voice;
1824 	runtime->private_free = snd_trident_pcm_free_substream;
1825 	runtime->hw = snd_trident_playback;
1826 	snd_pcm_set_sync(substream);
1827 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
1828 	return 0;
1829 }
1830 
1831 /*---------------------------------------------------------------------------
1832    snd_trident_playback_close
1833 
1834    Description: This routine will close the 4DWave playback device. For now
1835                 we will simply free the dma transfer buffer.
1836 
1837    Parameters:	substream  - PCM substream class
1838 
1839   ---------------------------------------------------------------------------*/
1840 static int snd_trident_playback_close(snd_pcm_substream_t * substream)
1841 {
1842 	trident_t *trident = snd_pcm_substream_chip(substream);
1843 	snd_pcm_runtime_t *runtime = substream->runtime;
1844 	snd_trident_voice_t *voice = (snd_trident_voice_t *) runtime->private_data;
1845 
1846 	snd_trident_pcm_mixer_free(trident, voice, substream);
1847 	return 0;
1848 }
1849 
1850 /*---------------------------------------------------------------------------
1851    snd_trident_spdif_open
1852 
1853    Description: This routine will open the 4DWave SPDIF device.
1854 
1855    Parameters:	substream  - PCM substream class
1856 
1857    Returns:     status  - success or failure flag
1858 
1859   ---------------------------------------------------------------------------*/
1860 
1861 static int snd_trident_spdif_open(snd_pcm_substream_t * substream)
1862 {
1863 	trident_t *trident = snd_pcm_substream_chip(substream);
1864 	snd_trident_voice_t *voice;
1865 	snd_pcm_runtime_t *runtime = substream->runtime;
1866 
1867 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
1868 	if (voice == NULL)
1869 		return -EAGAIN;
1870 	voice->spdif = 1;
1871 	voice->substream = substream;
1872 	spin_lock_irq(&trident->reg_lock);
1873 	trident->spdif_pcm_bits = trident->spdif_bits;
1874 	spin_unlock_irq(&trident->reg_lock);
1875 
1876 	runtime->private_data = voice;
1877 	runtime->private_free = snd_trident_pcm_free_substream;
1878 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
1879 		runtime->hw = snd_trident_spdif;
1880 	} else {
1881 		runtime->hw = snd_trident_spdif_7018;
1882 	}
1883 
1884 	trident->spdif_pcm_ctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1885 	snd_ctl_notify(trident->card, SNDRV_CTL_EVENT_MASK_VALUE |
1886 		       SNDRV_CTL_EVENT_MASK_INFO, &trident->spdif_pcm_ctl->id);
1887 
1888 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
1889 	return 0;
1890 }
1891 
1892 
1893 /*---------------------------------------------------------------------------
1894    snd_trident_spdif_close
1895 
1896    Description: This routine will close the 4DWave SPDIF device.
1897 
1898    Parameters:	substream  - PCM substream class
1899 
1900   ---------------------------------------------------------------------------*/
1901 
1902 static int snd_trident_spdif_close(snd_pcm_substream_t * substream)
1903 {
1904 	trident_t *trident = snd_pcm_substream_chip(substream);
1905 	unsigned int temp;
1906 
1907 	spin_lock_irq(&trident->reg_lock);
1908 	// restore default SPDIF setting
1909 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
1910 		outb(trident->spdif_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
1911 		outl(trident->spdif_bits, TRID_REG(trident, NX_SPCSTATUS));
1912 	} else {
1913 		outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
1914 		temp = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1915 		if (trident->spdif_ctrl) {
1916 			temp |= SPDIF_EN;
1917 		} else {
1918 			temp &= ~SPDIF_EN;
1919 		}
1920 		outl(temp, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
1921 	}
1922 	spin_unlock_irq(&trident->reg_lock);
1923 	trident->spdif_pcm_ctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
1924 	snd_ctl_notify(trident->card, SNDRV_CTL_EVENT_MASK_VALUE |
1925 		       SNDRV_CTL_EVENT_MASK_INFO, &trident->spdif_pcm_ctl->id);
1926 	return 0;
1927 }
1928 
1929 /*---------------------------------------------------------------------------
1930    snd_trident_capture_open
1931 
1932    Description: This routine will open the 4DWave capture device.
1933 
1934    Parameters:	substream  - PCM substream class
1935 
1936    Returns:     status  - success or failure flag
1937 
1938   ---------------------------------------------------------------------------*/
1939 
1940 static int snd_trident_capture_open(snd_pcm_substream_t * substream)
1941 {
1942 	trident_t *trident = snd_pcm_substream_chip(substream);
1943 	snd_trident_voice_t *voice;
1944 	snd_pcm_runtime_t *runtime = substream->runtime;
1945 
1946 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
1947 	if (voice == NULL)
1948 		return -EAGAIN;
1949 	voice->capture = 1;
1950 	voice->substream = substream;
1951 	runtime->private_data = voice;
1952 	runtime->private_free = snd_trident_pcm_free_substream;
1953 	runtime->hw = snd_trident_capture;
1954 	snd_pcm_set_sync(substream);
1955 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
1956 	return 0;
1957 }
1958 
1959 /*---------------------------------------------------------------------------
1960    snd_trident_capture_close
1961 
1962    Description: This routine will close the 4DWave capture device. For now
1963                 we will simply free the dma transfer buffer.
1964 
1965    Parameters:	substream  - PCM substream class
1966 
1967   ---------------------------------------------------------------------------*/
1968 static int snd_trident_capture_close(snd_pcm_substream_t * substream)
1969 {
1970 	return 0;
1971 }
1972 
1973 /*---------------------------------------------------------------------------
1974    snd_trident_foldback_open
1975 
1976    Description: This routine will open the 4DWave foldback capture device.
1977 
1978    Parameters:	substream  - PCM substream class
1979 
1980    Returns:     status  - success or failure flag
1981 
1982   ---------------------------------------------------------------------------*/
1983 
1984 static int snd_trident_foldback_open(snd_pcm_substream_t * substream)
1985 {
1986 	trident_t *trident = snd_pcm_substream_chip(substream);
1987 	snd_trident_voice_t *voice;
1988 	snd_pcm_runtime_t *runtime = substream->runtime;
1989 
1990 	voice = snd_trident_alloc_voice(trident, SNDRV_TRIDENT_VOICE_TYPE_PCM, 0, 0);
1991 	if (voice == NULL)
1992 		return -EAGAIN;
1993 	voice->foldback_chan = substream->number;
1994 	voice->substream = substream;
1995 	runtime->private_data = voice;
1996 	runtime->private_free = snd_trident_pcm_free_substream;
1997 	runtime->hw = snd_trident_foldback;
1998 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 0, 64*1024);
1999 	return 0;
2000 }
2001 
2002 /*---------------------------------------------------------------------------
2003    snd_trident_foldback_close
2004 
2005    Description: This routine will close the 4DWave foldback capture device.
2006 		For now we will simply free the dma transfer buffer.
2007 
2008    Parameters:	substream  - PCM substream class
2009 
2010   ---------------------------------------------------------------------------*/
2011 static int snd_trident_foldback_close(snd_pcm_substream_t * substream)
2012 {
2013 	trident_t *trident = snd_pcm_substream_chip(substream);
2014 	snd_trident_voice_t *voice;
2015 	snd_pcm_runtime_t *runtime = substream->runtime;
2016 	voice = (snd_trident_voice_t *) runtime->private_data;
2017 
2018 	/* stop capture channel */
2019 	spin_lock_irq(&trident->reg_lock);
2020 	outb(0x00, TRID_REG(trident, T4D_RCI + voice->foldback_chan));
2021 	spin_unlock_irq(&trident->reg_lock);
2022 	return 0;
2023 }
2024 
2025 /*---------------------------------------------------------------------------
2026    PCM operations
2027   ---------------------------------------------------------------------------*/
2028 
2029 static snd_pcm_ops_t snd_trident_playback_ops = {
2030 	.open =		snd_trident_playback_open,
2031 	.close =	snd_trident_playback_close,
2032 	.ioctl =	snd_trident_ioctl,
2033 	.hw_params =	snd_trident_hw_params,
2034 	.hw_free =	snd_trident_hw_free,
2035 	.prepare =	snd_trident_playback_prepare,
2036 	.trigger =	snd_trident_trigger,
2037 	.pointer =	snd_trident_playback_pointer,
2038 };
2039 
2040 static snd_pcm_ops_t snd_trident_nx_playback_ops = {
2041 	.open =		snd_trident_playback_open,
2042 	.close =	snd_trident_playback_close,
2043 	.ioctl =	snd_trident_ioctl,
2044 	.hw_params =	snd_trident_hw_params,
2045 	.hw_free =	snd_trident_hw_free,
2046 	.prepare =	snd_trident_playback_prepare,
2047 	.trigger =	snd_trident_trigger,
2048 	.pointer =	snd_trident_playback_pointer,
2049 	.page =		snd_pcm_sgbuf_ops_page,
2050 };
2051 
2052 static snd_pcm_ops_t snd_trident_capture_ops = {
2053 	.open =		snd_trident_capture_open,
2054 	.close =	snd_trident_capture_close,
2055 	.ioctl =	snd_trident_ioctl,
2056 	.hw_params =	snd_trident_capture_hw_params,
2057 	.hw_free =	snd_trident_hw_free,
2058 	.prepare =	snd_trident_capture_prepare,
2059 	.trigger =	snd_trident_trigger,
2060 	.pointer =	snd_trident_capture_pointer,
2061 };
2062 
2063 static snd_pcm_ops_t snd_trident_si7018_capture_ops = {
2064 	.open =		snd_trident_capture_open,
2065 	.close =	snd_trident_capture_close,
2066 	.ioctl =	snd_trident_ioctl,
2067 	.hw_params =	snd_trident_si7018_capture_hw_params,
2068 	.hw_free =	snd_trident_si7018_capture_hw_free,
2069 	.prepare =	snd_trident_si7018_capture_prepare,
2070 	.trigger =	snd_trident_trigger,
2071 	.pointer =	snd_trident_playback_pointer,
2072 };
2073 
2074 static snd_pcm_ops_t snd_trident_foldback_ops = {
2075 	.open =		snd_trident_foldback_open,
2076 	.close =	snd_trident_foldback_close,
2077 	.ioctl =	snd_trident_ioctl,
2078 	.hw_params =	snd_trident_hw_params,
2079 	.hw_free =	snd_trident_hw_free,
2080 	.prepare =	snd_trident_foldback_prepare,
2081 	.trigger =	snd_trident_trigger,
2082 	.pointer =	snd_trident_playback_pointer,
2083 };
2084 
2085 static snd_pcm_ops_t snd_trident_nx_foldback_ops = {
2086 	.open =		snd_trident_foldback_open,
2087 	.close =	snd_trident_foldback_close,
2088 	.ioctl =	snd_trident_ioctl,
2089 	.hw_params =	snd_trident_hw_params,
2090 	.hw_free =	snd_trident_hw_free,
2091 	.prepare =	snd_trident_foldback_prepare,
2092 	.trigger =	snd_trident_trigger,
2093 	.pointer =	snd_trident_playback_pointer,
2094 	.page =		snd_pcm_sgbuf_ops_page,
2095 };
2096 
2097 static snd_pcm_ops_t snd_trident_spdif_ops = {
2098 	.open =		snd_trident_spdif_open,
2099 	.close =	snd_trident_spdif_close,
2100 	.ioctl =	snd_trident_ioctl,
2101 	.hw_params =	snd_trident_spdif_hw_params,
2102 	.hw_free =	snd_trident_hw_free,
2103 	.prepare =	snd_trident_spdif_prepare,
2104 	.trigger =	snd_trident_trigger,
2105 	.pointer =	snd_trident_spdif_pointer,
2106 };
2107 
2108 static snd_pcm_ops_t snd_trident_spdif_7018_ops = {
2109 	.open =		snd_trident_spdif_open,
2110 	.close =	snd_trident_spdif_close,
2111 	.ioctl =	snd_trident_ioctl,
2112 	.hw_params =	snd_trident_spdif_hw_params,
2113 	.hw_free =	snd_trident_hw_free,
2114 	.prepare =	snd_trident_spdif_prepare,
2115 	.trigger =	snd_trident_trigger,
2116 	.pointer =	snd_trident_playback_pointer,
2117 };
2118 
2119 /*---------------------------------------------------------------------------
2120    snd_trident_pcm_free
2121 
2122    Description: This routine release the 4DWave private data.
2123 
2124    Paramters:   private_data - pointer to 4DWave device info.
2125 
2126    Returns:     None
2127 
2128   ---------------------------------------------------------------------------*/
2129 static void snd_trident_pcm_free(snd_pcm_t *pcm)
2130 {
2131 	trident_t *trident = pcm->private_data;
2132 	trident->pcm = NULL;
2133 	snd_pcm_lib_preallocate_free_for_all(pcm);
2134 }
2135 
2136 static void snd_trident_foldback_pcm_free(snd_pcm_t *pcm)
2137 {
2138 	trident_t *trident = pcm->private_data;
2139 	trident->foldback = NULL;
2140 	snd_pcm_lib_preallocate_free_for_all(pcm);
2141 }
2142 
2143 static void snd_trident_spdif_pcm_free(snd_pcm_t *pcm)
2144 {
2145 	trident_t *trident = pcm->private_data;
2146 	trident->spdif = NULL;
2147 	snd_pcm_lib_preallocate_free_for_all(pcm);
2148 }
2149 
2150 /*---------------------------------------------------------------------------
2151    snd_trident_pcm
2152 
2153    Description: This routine registers the 4DWave device for PCM support.
2154 
2155    Paramters:   trident - pointer to target device class for 4DWave.
2156 
2157    Returns:     None
2158 
2159   ---------------------------------------------------------------------------*/
2160 
2161 int __devinit snd_trident_pcm(trident_t * trident, int device, snd_pcm_t ** rpcm)
2162 {
2163 	snd_pcm_t *pcm;
2164 	int err;
2165 
2166 	if (rpcm)
2167 		*rpcm = NULL;
2168 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx", device, trident->ChanPCM, 1, &pcm)) < 0)
2169 		return err;
2170 
2171 	pcm->private_data = trident;
2172 	pcm->private_free = snd_trident_pcm_free;
2173 
2174 	if (trident->tlb.entries) {
2175 		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_nx_playback_ops);
2176 	} else {
2177 		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_playback_ops);
2178 	}
2179 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
2180 			trident->device != TRIDENT_DEVICE_ID_SI7018 ?
2181 			&snd_trident_capture_ops :
2182 			&snd_trident_si7018_capture_ops);
2183 
2184 	pcm->info_flags = 0;
2185 	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
2186 	strcpy(pcm->name, "Trident 4DWave");
2187 	trident->pcm = pcm;
2188 
2189 	if (trident->tlb.entries) {
2190 		snd_pcm_substream_t *substream;
2191 		for (substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; substream; substream = substream->next)
2192 			snd_pcm_lib_preallocate_pages(substream, SNDRV_DMA_TYPE_DEV_SG,
2193 						      snd_dma_pci_data(trident->pci),
2194 						      64*1024, 128*1024);
2195 		snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
2196 					      SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(trident->pci),
2197 					      64*1024, 128*1024);
2198 	} else {
2199 		snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
2200 						      snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
2201 	}
2202 
2203 	if (rpcm)
2204 		*rpcm = pcm;
2205 	return 0;
2206 }
2207 
2208 /*---------------------------------------------------------------------------
2209    snd_trident_foldback_pcm
2210 
2211    Description: This routine registers the 4DWave device for foldback PCM support.
2212 
2213    Paramters:   trident - pointer to target device class for 4DWave.
2214 
2215    Returns:     None
2216 
2217   ---------------------------------------------------------------------------*/
2218 
2219 int __devinit snd_trident_foldback_pcm(trident_t * trident, int device, snd_pcm_t ** rpcm)
2220 {
2221 	snd_pcm_t *foldback;
2222 	int err;
2223 	int num_chan = 3;
2224 	snd_pcm_substream_t *substream;
2225 
2226 	if (rpcm)
2227 		*rpcm = NULL;
2228 	if (trident->device == TRIDENT_DEVICE_ID_NX)
2229 		num_chan = 4;
2230 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx", device, 0, num_chan, &foldback)) < 0)
2231 		return err;
2232 
2233 	foldback->private_data = trident;
2234 	foldback->private_free = snd_trident_foldback_pcm_free;
2235 	if (trident->tlb.entries)
2236 		snd_pcm_set_ops(foldback, SNDRV_PCM_STREAM_CAPTURE, &snd_trident_nx_foldback_ops);
2237 	else
2238 		snd_pcm_set_ops(foldback, SNDRV_PCM_STREAM_CAPTURE, &snd_trident_foldback_ops);
2239 	foldback->info_flags = 0;
2240 	strcpy(foldback->name, "Trident 4DWave");
2241 	substream = foldback->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
2242 	strcpy(substream->name, "Front Mixer");
2243 	substream = substream->next;
2244 	strcpy(substream->name, "Reverb Mixer");
2245 	substream = substream->next;
2246 	strcpy(substream->name, "Chorus Mixer");
2247 	if (num_chan == 4) {
2248 		substream = substream->next;
2249 		strcpy(substream->name, "Second AC'97 ADC");
2250 	}
2251 	trident->foldback = foldback;
2252 
2253 	if (trident->tlb.entries)
2254 		snd_pcm_lib_preallocate_pages_for_all(foldback, SNDRV_DMA_TYPE_DEV_SG,
2255 						      snd_dma_pci_data(trident->pci), 0, 128*1024);
2256 	else
2257 		snd_pcm_lib_preallocate_pages_for_all(foldback, SNDRV_DMA_TYPE_DEV,
2258 						      snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
2259 
2260 	if (rpcm)
2261 		*rpcm = foldback;
2262 	return 0;
2263 }
2264 
2265 /*---------------------------------------------------------------------------
2266    snd_trident_spdif
2267 
2268    Description: This routine registers the 4DWave-NX device for SPDIF support.
2269 
2270    Paramters:   trident - pointer to target device class for 4DWave-NX.
2271 
2272    Returns:     None
2273 
2274   ---------------------------------------------------------------------------*/
2275 
2276 int __devinit snd_trident_spdif_pcm(trident_t * trident, int device, snd_pcm_t ** rpcm)
2277 {
2278 	snd_pcm_t *spdif;
2279 	int err;
2280 
2281 	if (rpcm)
2282 		*rpcm = NULL;
2283 	if ((err = snd_pcm_new(trident->card, "trident_dx_nx IEC958", device, 1, 0, &spdif)) < 0)
2284 		return err;
2285 
2286 	spdif->private_data = trident;
2287 	spdif->private_free = snd_trident_spdif_pcm_free;
2288 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2289 		snd_pcm_set_ops(spdif, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_spdif_ops);
2290 	} else {
2291 		snd_pcm_set_ops(spdif, SNDRV_PCM_STREAM_PLAYBACK, &snd_trident_spdif_7018_ops);
2292 	}
2293 	spdif->info_flags = 0;
2294 	strcpy(spdif->name, "Trident 4DWave IEC958");
2295 	trident->spdif = spdif;
2296 
2297 	snd_pcm_lib_preallocate_pages_for_all(spdif, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(trident->pci), 64*1024, 128*1024);
2298 
2299 	if (rpcm)
2300 		*rpcm = spdif;
2301 	return 0;
2302 }
2303 
2304 /*
2305  *  Mixer part
2306  */
2307 
2308 
2309 /*---------------------------------------------------------------------------
2310     snd_trident_spdif_control
2311 
2312     Description: enable/disable S/PDIF out from ac97 mixer
2313   ---------------------------------------------------------------------------*/
2314 
2315 static int snd_trident_spdif_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2316 {
2317 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2318 	uinfo->count = 1;
2319 	uinfo->value.integer.min = 0;
2320 	uinfo->value.integer.max = 1;
2321 	return 0;
2322 }
2323 
2324 static int snd_trident_spdif_control_get(snd_kcontrol_t * kcontrol,
2325 					 snd_ctl_elem_value_t * ucontrol)
2326 {
2327 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2328 	unsigned char val;
2329 
2330 	spin_lock_irq(&trident->reg_lock);
2331 	val = trident->spdif_ctrl;
2332 	ucontrol->value.integer.value[0] = val == kcontrol->private_value;
2333 	spin_unlock_irq(&trident->reg_lock);
2334 	return 0;
2335 }
2336 
2337 static int snd_trident_spdif_control_put(snd_kcontrol_t * kcontrol,
2338 					 snd_ctl_elem_value_t * ucontrol)
2339 {
2340 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2341 	unsigned char val;
2342 	int change;
2343 
2344 	val = ucontrol->value.integer.value[0] ? (unsigned char) kcontrol->private_value : 0x00;
2345 	spin_lock_irq(&trident->reg_lock);
2346 	/* S/PDIF C Channel bits 0-31 : 48khz, SCMS disabled */
2347 	change = trident->spdif_ctrl != val;
2348 	trident->spdif_ctrl = val;
2349 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2350 		if ((inb(TRID_REG(trident, NX_SPCTRL_SPCSO + 3)) & 0x10) == 0) {
2351 			outl(trident->spdif_bits, TRID_REG(trident, NX_SPCSTATUS));
2352 			outb(trident->spdif_ctrl, TRID_REG(trident, NX_SPCTRL_SPCSO + 3));
2353 		}
2354 	} else {
2355 		if (trident->spdif == NULL) {
2356 			unsigned int temp;
2357 			outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
2358 			temp = inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) & ~SPDIF_EN;
2359 			if (val)
2360 				temp |= SPDIF_EN;
2361 			outl(temp, TRID_REG(trident, SI_SERIAL_INTF_CTRL));
2362 		}
2363 	}
2364 	spin_unlock_irq(&trident->reg_lock);
2365 	return change;
2366 }
2367 
2368 static snd_kcontrol_new_t snd_trident_spdif_control __devinitdata =
2369 {
2370 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2371 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,SWITCH),
2372 	.info =		snd_trident_spdif_control_info,
2373 	.get =		snd_trident_spdif_control_get,
2374 	.put =		snd_trident_spdif_control_put,
2375 	.private_value = 0x28,
2376 };
2377 
2378 /*---------------------------------------------------------------------------
2379     snd_trident_spdif_default
2380 
2381     Description: put/get the S/PDIF default settings
2382   ---------------------------------------------------------------------------*/
2383 
2384 static int snd_trident_spdif_default_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2385 {
2386 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
2387 	uinfo->count = 1;
2388 	return 0;
2389 }
2390 
2391 static int snd_trident_spdif_default_get(snd_kcontrol_t * kcontrol,
2392 					 snd_ctl_elem_value_t * ucontrol)
2393 {
2394 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2395 
2396 	spin_lock_irq(&trident->reg_lock);
2397 	ucontrol->value.iec958.status[0] = (trident->spdif_bits >> 0) & 0xff;
2398 	ucontrol->value.iec958.status[1] = (trident->spdif_bits >> 8) & 0xff;
2399 	ucontrol->value.iec958.status[2] = (trident->spdif_bits >> 16) & 0xff;
2400 	ucontrol->value.iec958.status[3] = (trident->spdif_bits >> 24) & 0xff;
2401 	spin_unlock_irq(&trident->reg_lock);
2402 	return 0;
2403 }
2404 
2405 static int snd_trident_spdif_default_put(snd_kcontrol_t * kcontrol,
2406 					 snd_ctl_elem_value_t * ucontrol)
2407 {
2408 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2409 	unsigned int val;
2410 	int change;
2411 
2412 	val = (ucontrol->value.iec958.status[0] << 0) |
2413 	      (ucontrol->value.iec958.status[1] << 8) |
2414 	      (ucontrol->value.iec958.status[2] << 16) |
2415 	      (ucontrol->value.iec958.status[3] << 24);
2416 	spin_lock_irq(&trident->reg_lock);
2417 	change = trident->spdif_bits != val;
2418 	trident->spdif_bits = val;
2419 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2420 		if ((inb(TRID_REG(trident, NX_SPCTRL_SPCSO + 3)) & 0x10) == 0)
2421 			outl(trident->spdif_bits, TRID_REG(trident, NX_SPCSTATUS));
2422 	} else {
2423 		if (trident->spdif == NULL)
2424 			outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
2425 	}
2426 	spin_unlock_irq(&trident->reg_lock);
2427 	return change;
2428 }
2429 
2430 static snd_kcontrol_new_t snd_trident_spdif_default __devinitdata =
2431 {
2432 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
2433 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,DEFAULT),
2434 	.info =		snd_trident_spdif_default_info,
2435 	.get =		snd_trident_spdif_default_get,
2436 	.put =		snd_trident_spdif_default_put
2437 };
2438 
2439 /*---------------------------------------------------------------------------
2440     snd_trident_spdif_mask
2441 
2442     Description: put/get the S/PDIF mask
2443   ---------------------------------------------------------------------------*/
2444 
2445 static int snd_trident_spdif_mask_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2446 {
2447 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
2448 	uinfo->count = 1;
2449 	return 0;
2450 }
2451 
2452 static int snd_trident_spdif_mask_get(snd_kcontrol_t * kcontrol,
2453 				      snd_ctl_elem_value_t * ucontrol)
2454 {
2455 	ucontrol->value.iec958.status[0] = 0xff;
2456 	ucontrol->value.iec958.status[1] = 0xff;
2457 	ucontrol->value.iec958.status[2] = 0xff;
2458 	ucontrol->value.iec958.status[3] = 0xff;
2459 	return 0;
2460 }
2461 
2462 static snd_kcontrol_new_t snd_trident_spdif_mask __devinitdata =
2463 {
2464 	.access =	SNDRV_CTL_ELEM_ACCESS_READ,
2465 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
2466 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,MASK),
2467 	.info =		snd_trident_spdif_mask_info,
2468 	.get =		snd_trident_spdif_mask_get,
2469 };
2470 
2471 /*---------------------------------------------------------------------------
2472     snd_trident_spdif_stream
2473 
2474     Description: put/get the S/PDIF stream settings
2475   ---------------------------------------------------------------------------*/
2476 
2477 static int snd_trident_spdif_stream_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2478 {
2479 	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
2480 	uinfo->count = 1;
2481 	return 0;
2482 }
2483 
2484 static int snd_trident_spdif_stream_get(snd_kcontrol_t * kcontrol,
2485 					snd_ctl_elem_value_t * ucontrol)
2486 {
2487 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2488 
2489 	spin_lock_irq(&trident->reg_lock);
2490 	ucontrol->value.iec958.status[0] = (trident->spdif_pcm_bits >> 0) & 0xff;
2491 	ucontrol->value.iec958.status[1] = (trident->spdif_pcm_bits >> 8) & 0xff;
2492 	ucontrol->value.iec958.status[2] = (trident->spdif_pcm_bits >> 16) & 0xff;
2493 	ucontrol->value.iec958.status[3] = (trident->spdif_pcm_bits >> 24) & 0xff;
2494 	spin_unlock_irq(&trident->reg_lock);
2495 	return 0;
2496 }
2497 
2498 static int snd_trident_spdif_stream_put(snd_kcontrol_t * kcontrol,
2499 					snd_ctl_elem_value_t * ucontrol)
2500 {
2501 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2502 	unsigned int val;
2503 	int change;
2504 
2505 	val = (ucontrol->value.iec958.status[0] << 0) |
2506 	      (ucontrol->value.iec958.status[1] << 8) |
2507 	      (ucontrol->value.iec958.status[2] << 16) |
2508 	      (ucontrol->value.iec958.status[3] << 24);
2509 	spin_lock_irq(&trident->reg_lock);
2510 	change = trident->spdif_pcm_bits != val;
2511 	trident->spdif_pcm_bits = val;
2512 	if (trident->spdif != NULL) {
2513 		if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
2514 			outl(trident->spdif_pcm_bits, TRID_REG(trident, NX_SPCSTATUS));
2515 		} else {
2516 			outl(trident->spdif_bits, TRID_REG(trident, SI_SPDIF_CS));
2517 		}
2518 	}
2519 	spin_unlock_irq(&trident->reg_lock);
2520 	return change;
2521 }
2522 
2523 static snd_kcontrol_new_t snd_trident_spdif_stream __devinitdata =
2524 {
2525 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2526 	.iface =	SNDRV_CTL_ELEM_IFACE_PCM,
2527 	.name =         SNDRV_CTL_NAME_IEC958("",PLAYBACK,PCM_STREAM),
2528 	.info =		snd_trident_spdif_stream_info,
2529 	.get =		snd_trident_spdif_stream_get,
2530 	.put =		snd_trident_spdif_stream_put
2531 };
2532 
2533 /*---------------------------------------------------------------------------
2534     snd_trident_ac97_control
2535 
2536     Description: enable/disable rear path for ac97
2537   ---------------------------------------------------------------------------*/
2538 
2539 static int snd_trident_ac97_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2540 {
2541 	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
2542 	uinfo->count = 1;
2543 	uinfo->value.integer.min = 0;
2544 	uinfo->value.integer.max = 1;
2545 	return 0;
2546 }
2547 
2548 static int snd_trident_ac97_control_get(snd_kcontrol_t * kcontrol,
2549 					snd_ctl_elem_value_t * ucontrol)
2550 {
2551 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2552 	unsigned char val;
2553 
2554 	spin_lock_irq(&trident->reg_lock);
2555 	val = trident->ac97_ctrl = inl(TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
2556 	ucontrol->value.integer.value[0] = (val & (1 << kcontrol->private_value)) ? 1 : 0;
2557 	spin_unlock_irq(&trident->reg_lock);
2558 	return 0;
2559 }
2560 
2561 static int snd_trident_ac97_control_put(snd_kcontrol_t * kcontrol,
2562 					snd_ctl_elem_value_t * ucontrol)
2563 {
2564 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2565 	unsigned char val;
2566 	int change = 0;
2567 
2568 	spin_lock_irq(&trident->reg_lock);
2569 	val = trident->ac97_ctrl = inl(TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
2570 	val &= ~(1 << kcontrol->private_value);
2571 	if (ucontrol->value.integer.value[0])
2572 		val |= 1 << kcontrol->private_value;
2573 	change = val != trident->ac97_ctrl;
2574 	trident->ac97_ctrl = val;
2575 	outl(trident->ac97_ctrl = val, TRID_REG(trident, NX_ACR0_AC97_COM_STAT));
2576 	spin_unlock_irq(&trident->reg_lock);
2577 	return change;
2578 }
2579 
2580 static snd_kcontrol_new_t snd_trident_ac97_rear_control __devinitdata =
2581 {
2582 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2583 	.name =         "Rear Path",
2584 	.info =		snd_trident_ac97_control_info,
2585 	.get =		snd_trident_ac97_control_get,
2586 	.put =		snd_trident_ac97_control_put,
2587 	.private_value = 4,
2588 };
2589 
2590 /*---------------------------------------------------------------------------
2591     snd_trident_vol_control
2592 
2593     Description: wave & music volume control
2594   ---------------------------------------------------------------------------*/
2595 
2596 static int snd_trident_vol_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2597 {
2598 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2599 	uinfo->count = 2;
2600 	uinfo->value.integer.min = 0;
2601 	uinfo->value.integer.max = 255;
2602 	return 0;
2603 }
2604 
2605 static int snd_trident_vol_control_get(snd_kcontrol_t * kcontrol,
2606 				       snd_ctl_elem_value_t * ucontrol)
2607 {
2608 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2609 	unsigned int val;
2610 
2611 	val = trident->musicvol_wavevol;
2612 	ucontrol->value.integer.value[0] = 255 - ((val >> kcontrol->private_value) & 0xff);
2613 	ucontrol->value.integer.value[1] = 255 - ((val >> (kcontrol->private_value + 8)) & 0xff);
2614 	return 0;
2615 }
2616 
2617 static int snd_trident_vol_control_put(snd_kcontrol_t * kcontrol,
2618 				       snd_ctl_elem_value_t * ucontrol)
2619 {
2620 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2621 	unsigned int val;
2622 	int change = 0;
2623 
2624 	spin_lock_irq(&trident->reg_lock);
2625 	val = trident->musicvol_wavevol;
2626 	val &= ~(0xffff << kcontrol->private_value);
2627 	val |= ((255 - (ucontrol->value.integer.value[0] & 0xff)) |
2628 	        ((255 - (ucontrol->value.integer.value[1] & 0xff)) << 8)) << kcontrol->private_value;
2629 	change = val != trident->musicvol_wavevol;
2630 	outl(trident->musicvol_wavevol = val, TRID_REG(trident, T4D_MUSICVOL_WAVEVOL));
2631 	spin_unlock_irq(&trident->reg_lock);
2632 	return change;
2633 }
2634 
2635 static snd_kcontrol_new_t snd_trident_vol_music_control __devinitdata =
2636 {
2637 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2638 	.name =         "Music Playback Volume",
2639 	.info =		snd_trident_vol_control_info,
2640 	.get =		snd_trident_vol_control_get,
2641 	.put =		snd_trident_vol_control_put,
2642 	.private_value = 16,
2643 };
2644 
2645 static snd_kcontrol_new_t snd_trident_vol_wave_control __devinitdata =
2646 {
2647 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2648 	.name =         "Wave Playback Volume",
2649 	.info =		snd_trident_vol_control_info,
2650 	.get =		snd_trident_vol_control_get,
2651 	.put =		snd_trident_vol_control_put,
2652 	.private_value = 0,
2653 };
2654 
2655 /*---------------------------------------------------------------------------
2656     snd_trident_pcm_vol_control
2657 
2658     Description: PCM front volume control
2659   ---------------------------------------------------------------------------*/
2660 
2661 static int snd_trident_pcm_vol_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2662 {
2663 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2664 
2665 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2666 	uinfo->count = 1;
2667 	uinfo->value.integer.min = 0;
2668 	uinfo->value.integer.max = 255;
2669 	if (trident->device == TRIDENT_DEVICE_ID_SI7018)
2670 		uinfo->value.integer.max = 1023;
2671 	return 0;
2672 }
2673 
2674 static int snd_trident_pcm_vol_control_get(snd_kcontrol_t * kcontrol,
2675 					   snd_ctl_elem_value_t * ucontrol)
2676 {
2677 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2678 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2679 
2680 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
2681 		ucontrol->value.integer.value[0] = 1023 - mix->vol;
2682 	} else {
2683 		ucontrol->value.integer.value[0] = 255 - (mix->vol>>2);
2684 	}
2685 	return 0;
2686 }
2687 
2688 static int snd_trident_pcm_vol_control_put(snd_kcontrol_t * kcontrol,
2689 					   snd_ctl_elem_value_t * ucontrol)
2690 {
2691 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2692 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2693 	unsigned int val;
2694 	int change = 0;
2695 
2696 	if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
2697 		val = 1023 - (ucontrol->value.integer.value[0] & 1023);
2698 	} else {
2699 		val = (255 - (ucontrol->value.integer.value[0] & 255)) << 2;
2700 	}
2701 	spin_lock_irq(&trident->reg_lock);
2702 	change = val != mix->vol;
2703 	mix->vol = val;
2704 	if (mix->voice != NULL)
2705 		snd_trident_write_vol_reg(trident, mix->voice, val);
2706 	spin_unlock_irq(&trident->reg_lock);
2707 	return change;
2708 }
2709 
2710 static snd_kcontrol_new_t snd_trident_pcm_vol_control __devinitdata =
2711 {
2712 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2713 	.name =         "PCM Front Playback Volume",
2714 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2715 	.count =	32,
2716 	.info =		snd_trident_pcm_vol_control_info,
2717 	.get =		snd_trident_pcm_vol_control_get,
2718 	.put =		snd_trident_pcm_vol_control_put,
2719 };
2720 
2721 /*---------------------------------------------------------------------------
2722     snd_trident_pcm_pan_control
2723 
2724     Description: PCM front pan control
2725   ---------------------------------------------------------------------------*/
2726 
2727 static int snd_trident_pcm_pan_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2728 {
2729 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2730 	uinfo->count = 1;
2731 	uinfo->value.integer.min = 0;
2732 	uinfo->value.integer.max = 127;
2733 	return 0;
2734 }
2735 
2736 static int snd_trident_pcm_pan_control_get(snd_kcontrol_t * kcontrol,
2737 					   snd_ctl_elem_value_t * ucontrol)
2738 {
2739 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2740 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2741 
2742 	ucontrol->value.integer.value[0] = mix->pan;
2743 	if (ucontrol->value.integer.value[0] & 0x40) {
2744 		ucontrol->value.integer.value[0] = (0x3f - (ucontrol->value.integer.value[0] & 0x3f));
2745 	} else {
2746 		ucontrol->value.integer.value[0] |= 0x40;
2747 	}
2748 	return 0;
2749 }
2750 
2751 static int snd_trident_pcm_pan_control_put(snd_kcontrol_t * kcontrol,
2752 					   snd_ctl_elem_value_t * ucontrol)
2753 {
2754 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2755 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2756 	unsigned char val;
2757 	int change = 0;
2758 
2759 	if (ucontrol->value.integer.value[0] & 0x40)
2760 		val = ucontrol->value.integer.value[0] & 0x3f;
2761 	else
2762 		val = (0x3f - (ucontrol->value.integer.value[0] & 0x3f)) | 0x40;
2763 	spin_lock_irq(&trident->reg_lock);
2764 	change = val != mix->pan;
2765 	mix->pan = val;
2766 	if (mix->voice != NULL)
2767 		snd_trident_write_pan_reg(trident, mix->voice, val);
2768 	spin_unlock_irq(&trident->reg_lock);
2769 	return change;
2770 }
2771 
2772 static snd_kcontrol_new_t snd_trident_pcm_pan_control __devinitdata =
2773 {
2774 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2775 	.name =         "PCM Pan Playback Control",
2776 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2777 	.count =	32,
2778 	.info =		snd_trident_pcm_pan_control_info,
2779 	.get =		snd_trident_pcm_pan_control_get,
2780 	.put =		snd_trident_pcm_pan_control_put,
2781 };
2782 
2783 /*---------------------------------------------------------------------------
2784     snd_trident_pcm_rvol_control
2785 
2786     Description: PCM reverb volume control
2787   ---------------------------------------------------------------------------*/
2788 
2789 static int snd_trident_pcm_rvol_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2790 {
2791 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2792 	uinfo->count = 1;
2793 	uinfo->value.integer.min = 0;
2794 	uinfo->value.integer.max = 127;
2795 	return 0;
2796 }
2797 
2798 static int snd_trident_pcm_rvol_control_get(snd_kcontrol_t * kcontrol,
2799 					    snd_ctl_elem_value_t * ucontrol)
2800 {
2801 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2802 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2803 
2804 	ucontrol->value.integer.value[0] = 127 - mix->rvol;
2805 	return 0;
2806 }
2807 
2808 static int snd_trident_pcm_rvol_control_put(snd_kcontrol_t * kcontrol,
2809 					    snd_ctl_elem_value_t * ucontrol)
2810 {
2811 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2812 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2813 	unsigned short val;
2814 	int change = 0;
2815 
2816 	val = 0x7f - (ucontrol->value.integer.value[0] & 0x7f);
2817 	spin_lock_irq(&trident->reg_lock);
2818 	change = val != mix->rvol;
2819 	mix->rvol = val;
2820 	if (mix->voice != NULL)
2821 		snd_trident_write_rvol_reg(trident, mix->voice, val);
2822 	spin_unlock_irq(&trident->reg_lock);
2823 	return change;
2824 }
2825 
2826 static snd_kcontrol_new_t snd_trident_pcm_rvol_control __devinitdata =
2827 {
2828 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2829 	.name =         "PCM Reverb Playback Volume",
2830 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2831 	.count = 	32,
2832 	.info =		snd_trident_pcm_rvol_control_info,
2833 	.get =		snd_trident_pcm_rvol_control_get,
2834 	.put =		snd_trident_pcm_rvol_control_put,
2835 };
2836 
2837 /*---------------------------------------------------------------------------
2838     snd_trident_pcm_cvol_control
2839 
2840     Description: PCM chorus volume control
2841   ---------------------------------------------------------------------------*/
2842 
2843 static int snd_trident_pcm_cvol_control_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
2844 {
2845 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
2846 	uinfo->count = 1;
2847 	uinfo->value.integer.min = 0;
2848 	uinfo->value.integer.max = 127;
2849 	return 0;
2850 }
2851 
2852 static int snd_trident_pcm_cvol_control_get(snd_kcontrol_t * kcontrol,
2853 					    snd_ctl_elem_value_t * ucontrol)
2854 {
2855 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2856 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2857 
2858 	ucontrol->value.integer.value[0] = 127 - mix->cvol;
2859 	return 0;
2860 }
2861 
2862 static int snd_trident_pcm_cvol_control_put(snd_kcontrol_t * kcontrol,
2863 					    snd_ctl_elem_value_t * ucontrol)
2864 {
2865 	trident_t *trident = snd_kcontrol_chip(kcontrol);
2866 	snd_trident_pcm_mixer_t *mix = &trident->pcm_mixer[snd_ctl_get_ioffnum(kcontrol, &ucontrol->id)];
2867 	unsigned short val;
2868 	int change = 0;
2869 
2870 	val = 0x7f - (ucontrol->value.integer.value[0] & 0x7f);
2871 	spin_lock_irq(&trident->reg_lock);
2872 	change = val != mix->cvol;
2873 	mix->cvol = val;
2874 	if (mix->voice != NULL)
2875 		snd_trident_write_cvol_reg(trident, mix->voice, val);
2876 	spin_unlock_irq(&trident->reg_lock);
2877 	return change;
2878 }
2879 
2880 static snd_kcontrol_new_t snd_trident_pcm_cvol_control __devinitdata =
2881 {
2882 	.iface =	SNDRV_CTL_ELEM_IFACE_MIXER,
2883 	.name =         "PCM Chorus Playback Volume",
2884 	.access =	SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_INACTIVE,
2885 	.count =	32,
2886 	.info =		snd_trident_pcm_cvol_control_info,
2887 	.get =		snd_trident_pcm_cvol_control_get,
2888 	.put =		snd_trident_pcm_cvol_control_put,
2889 };
2890 
2891 static void snd_trident_notify_pcm_change1(snd_card_t * card, snd_kcontrol_t *kctl, int num, int activate)
2892 {
2893 	snd_ctl_elem_id_t id;
2894 
2895 	snd_runtime_check(kctl != NULL, return);
2896 	if (activate)
2897 		kctl->vd[num].access &= ~SNDRV_CTL_ELEM_ACCESS_INACTIVE;
2898 	else
2899 		kctl->vd[num].access |= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
2900 	snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE |
2901 		       SNDRV_CTL_EVENT_MASK_INFO,
2902 		       snd_ctl_build_ioff(&id, kctl, num));
2903 }
2904 
2905 static void snd_trident_notify_pcm_change(trident_t *trident, snd_trident_pcm_mixer_t *tmix, int num, int activate)
2906 {
2907 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_vol, num, activate);
2908 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_pan, num, activate);
2909 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_rvol, num, activate);
2910 	snd_trident_notify_pcm_change1(trident->card, trident->ctl_cvol, num, activate);
2911 }
2912 
2913 static int snd_trident_pcm_mixer_build(trident_t *trident, snd_trident_voice_t *voice, snd_pcm_substream_t *substream)
2914 {
2915 	snd_trident_pcm_mixer_t *tmix;
2916 
2917 	snd_assert(trident != NULL && voice != NULL && substream != NULL, return -EINVAL);
2918 	tmix = &trident->pcm_mixer[substream->number];
2919 	tmix->voice = voice;
2920 	tmix->vol = T4D_DEFAULT_PCM_VOL;
2921 	tmix->pan = T4D_DEFAULT_PCM_PAN;
2922 	tmix->rvol = T4D_DEFAULT_PCM_RVOL;
2923 	tmix->cvol = T4D_DEFAULT_PCM_CVOL;
2924 	snd_trident_notify_pcm_change(trident, tmix, substream->number, 1);
2925 	return 0;
2926 }
2927 
2928 static int snd_trident_pcm_mixer_free(trident_t *trident, snd_trident_voice_t *voice, snd_pcm_substream_t *substream)
2929 {
2930 	snd_trident_pcm_mixer_t *tmix;
2931 
2932 	snd_assert(trident != NULL && substream != NULL, return -EINVAL);
2933 	tmix = &trident->pcm_mixer[substream->number];
2934 	tmix->voice = NULL;
2935 	snd_trident_notify_pcm_change(trident, tmix, substream->number, 0);
2936 	return 0;
2937 }
2938 
2939 /*---------------------------------------------------------------------------
2940    snd_trident_mixer
2941 
2942    Description: This routine registers the 4DWave device for mixer support.
2943 
2944    Paramters:   trident - pointer to target device class for 4DWave.
2945 
2946    Returns:     None
2947 
2948   ---------------------------------------------------------------------------*/
2949 
2950 static int __devinit snd_trident_mixer(trident_t * trident, int pcm_spdif_device)
2951 {
2952 	ac97_template_t _ac97;
2953 	snd_card_t * card = trident->card;
2954 	snd_kcontrol_t *kctl;
2955 	snd_ctl_elem_value_t *uctl;
2956 	int idx, err, retries = 2;
2957 	static ac97_bus_ops_t ops = {
2958 		.write = snd_trident_codec_write,
2959 		.read = snd_trident_codec_read,
2960 	};
2961 
2962 	uctl = kcalloc(1, sizeof(*uctl), GFP_KERNEL);
2963 	if (!uctl)
2964 		return -ENOMEM;
2965 
2966 	if ((err = snd_ac97_bus(trident->card, 0, &ops, NULL, &trident->ac97_bus)) < 0)
2967 		goto __out;
2968 
2969 	memset(&_ac97, 0, sizeof(_ac97));
2970 	_ac97.private_data = trident;
2971 	trident->ac97_detect = 1;
2972 
2973       __again:
2974 	if ((err = snd_ac97_mixer(trident->ac97_bus, &_ac97, &trident->ac97)) < 0) {
2975 		if (trident->device == TRIDENT_DEVICE_ID_SI7018) {
2976 			if ((err = snd_trident_sis_reset(trident)) < 0)
2977 				goto __out;
2978 			if (retries-- > 0)
2979 				goto __again;
2980 			err = -EIO;
2981 		}
2982 		goto __out;
2983 	}
2984 
2985 	/* secondary codec? */
2986 	if (trident->device == TRIDENT_DEVICE_ID_SI7018 &&
2987 	    (inl(TRID_REG(trident, SI_SERIAL_INTF_CTRL)) & SI_AC97_PRIMARY_READY) != 0) {
2988 		_ac97.num = 1;
2989 		err = snd_ac97_mixer(trident->ac97_bus, &_ac97, &trident->ac97_sec);
2990 		if (err < 0)
2991 			snd_printk("SI7018: the secondary codec - invalid access\n");
2992 #if 0	// only for my testing purpose --jk
2993 		{
2994 			ac97_t *mc97;
2995 			err = snd_ac97_modem(trident->card, &_ac97, &mc97);
2996 			if (err < 0)
2997 				snd_printk("snd_ac97_modem returned error %i\n", err);
2998 		}
2999 #endif
3000 	}
3001 
3002 	trident->ac97_detect = 0;
3003 
3004 	if (trident->device != TRIDENT_DEVICE_ID_SI7018) {
3005 		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_trident_vol_wave_control, trident))) < 0)
3006 			goto __out;
3007 		kctl->put(kctl, uctl);
3008 		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_trident_vol_music_control, trident))) < 0)
3009 			goto __out;
3010 		kctl->put(kctl, uctl);
3011 		outl(trident->musicvol_wavevol = 0x00000000, TRID_REG(trident, T4D_MUSICVOL_WAVEVOL));
3012 	} else {
3013 		outl(trident->musicvol_wavevol = 0xffff0000, TRID_REG(trident, T4D_MUSICVOL_WAVEVOL));
3014 	}
3015 
3016 	for (idx = 0; idx < 32; idx++) {
3017 		snd_trident_pcm_mixer_t *tmix;
3018 
3019 		tmix = &trident->pcm_mixer[idx];
3020 		tmix->voice = NULL;
3021 	}
3022 	if ((trident->ctl_vol = snd_ctl_new1(&snd_trident_pcm_vol_control, trident)) == NULL)
3023 		goto __nomem;
3024 	if ((err = snd_ctl_add(card, trident->ctl_vol)))
3025 		goto __out;
3026 
3027 	if ((trident->ctl_pan = snd_ctl_new1(&snd_trident_pcm_pan_control, trident)) == NULL)
3028 		goto __nomem;
3029 	if ((err = snd_ctl_add(card, trident->ctl_pan)))
3030 		goto __out;
3031 
3032 	if ((trident->ctl_rvol = snd_ctl_new1(&snd_trident_pcm_rvol_control, trident)) == NULL)
3033 		goto __nomem;
3034 	if ((err = snd_ctl_add(card, trident->ctl_rvol)))
3035 		goto __out;
3036 
3037 	if ((trident->ctl_cvol = snd_ctl_new1(&snd_trident_pcm_cvol_control, trident)) == NULL)
3038 		goto __nomem;
3039 	if ((err = snd_ctl_add(card, trident->ctl_cvol)))
3040 		goto __out;
3041 
3042 	if (trident->device == TRIDENT_DEVICE_ID_NX) {
3043 		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_trident_ac97_rear_control, trident))) < 0)
3044 			goto __out;
3045 		kctl->put(kctl, uctl);
3046 	}
3047 	if (trident->device == TRIDENT_DEVICE_ID_NX || trident->device == TRIDENT_DEVICE_ID_SI7018) {
3048 
3049 		kctl = snd_ctl_new1(&snd_trident_spdif_control, trident);
3050 		if (kctl == NULL) {
3051 			err = -ENOMEM;
3052 			goto __out;
3053 		}
3054 		if (trident->ac97->ext_id & AC97_EI_SPDIF)
3055 			kctl->id.index++;
3056 		if (trident->ac97_sec && (trident->ac97_sec->ext_id & AC97_EI_SPDIF))
3057 			kctl->id.index++;
3058 		idx = kctl->id.index;
3059 		if ((err = snd_ctl_add(card, kctl)) < 0)
3060 			goto __out;
3061 		kctl->put(kctl, uctl);
3062 
3063 		kctl = snd_ctl_new1(&snd_trident_spdif_default, trident);
3064 		if (kctl == NULL) {
3065 			err = -ENOMEM;
3066 			goto __out;
3067 		}
3068 		kctl->id.index = idx;
3069 		kctl->id.device = pcm_spdif_device;
3070 		if ((err = snd_ctl_add(card, kctl)) < 0)
3071 			goto __out;
3072 
3073 		kctl = snd_ctl_new1(&snd_trident_spdif_mask, trident);
3074 		if (kctl == NULL) {
3075 			err = -ENOMEM;
3076 			goto __out;
3077 		}
3078 		kctl->id.index = idx;
3079 		kctl->id.device = pcm_spdif_device;
3080 		if ((err = snd_ctl_add(card, kctl)) < 0)
3081 			goto __out;
3082 
3083 		kctl = snd_ctl_new1(&snd_trident_spdif_stream, trident);
3084 		if (kctl == NULL) {
3085 			err = -ENOMEM;
3086 			goto __out;
3087 		}
3088 		kctl->id.index = idx;
3089 		kctl->id.device = pcm_spdif_device;
3090 		if ((err = snd_ctl_add(card, kctl)) < 0)
3091 			goto __out;
3092 		trident->spdif_pcm_ctl = kctl;
3093 	}
3094 
3095 	err = 0;
3096 	goto __out;
3097 
3098  __nomem:
3099 	err = -ENOMEM;
3100 
3101  __out:
3102 	kfree(uctl);
3103 
3104 	return err;
3105 }
3106 
3107 /*
3108  * gameport interface
3109  */
3110 
3111 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
3112 
3113 static unsigned char snd_trident_gameport_read(struct gameport *gameport)
3114 {
3115 	trident_t *chip = gameport_get_port_data(gameport);
3116 
3117 	snd_assert(chip, return 0);
3118 	return inb(TRID_REG(chip, GAMEPORT_LEGACY));
3119 }
3120 
3121 static void snd_trident_gameport_trigger(struct gameport *gameport)
3122 {
3123 	trident_t *chip = gameport_get_port_data(gameport);
3124 
3125 	snd_assert(chip, return);
3126 	outb(0xff, TRID_REG(chip, GAMEPORT_LEGACY));
3127 }
3128 
3129 static int snd_trident_gameport_cooked_read(struct gameport *gameport, int *axes, int *buttons)
3130 {
3131 	trident_t *chip = gameport_get_port_data(gameport);
3132 	int i;
3133 
3134 	snd_assert(chip, return 0);
3135 
3136 	*buttons = (~inb(TRID_REG(chip, GAMEPORT_LEGACY)) >> 4) & 0xf;
3137 
3138 	for (i = 0; i < 4; i++) {
3139 		axes[i] = inw(TRID_REG(chip, GAMEPORT_AXES + i * 2));
3140 		if (axes[i] == 0xffff) axes[i] = -1;
3141 	}
3142 
3143         return 0;
3144 }
3145 
3146 static int snd_trident_gameport_open(struct gameport *gameport, int mode)
3147 {
3148 	trident_t *chip = gameport_get_port_data(gameport);
3149 
3150 	snd_assert(chip, return 0);
3151 
3152 	switch (mode) {
3153 		case GAMEPORT_MODE_COOKED:
3154 			outb(GAMEPORT_MODE_ADC, TRID_REG(chip, GAMEPORT_GCR));
3155 			set_current_state(TASK_UNINTERRUPTIBLE);
3156 			schedule_timeout(1 + 20 * HZ / 1000); /* 20msec */
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 inline static 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 = kcalloc(1, 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