68 struct voice {  struct
82 	struct voice *timing;  argument
112 	/* voice_lock protects allocation/freeing of the voice descriptions
116 	struct voice voices[64];
117 	struct voice capture_voice;
187 static void sis_update_sso(struct voice *voice, u16 period)  in sis_update_sso()  argument
189 	void __iomem *base = voice->ctrl_base;  in sis_update_sso()
191 	voice->sso += period;  in sis_update_sso()
192 	if (voice->sso >= voice->buffer_size)  in sis_update_sso()
193 		voice->sso -= voice->buffer_size;  in sis_update_sso()
196 	if (voice->sso < 8)  in sis_update_sso()
197 		voice->sso = 8;  in sis_update_sso()
200 	writew(voice->sso & 0xffff, base + SIS_PLAY_DMA_SSO_ESO + 2);  in sis_update_sso()
203 static void sis_update_voice(struct voice *voice)  in sis_update_voice()  argument
205 	if (voice->flags & VOICE_SSO_TIMING) {  in sis_update_voice()
206 		sis_update_sso(voice, voice->period_size);  in sis_update_voice()
207 	} else if (voice->flags & VOICE_SYNC_TIMING) {  in sis_update_voice()
213 		if (voice->vperiod > voice->period_size) {  in sis_update_voice()
214 			voice->vperiod -= voice->period_size;  in sis_update_voice()
215 			if (voice->vperiod < voice->period_size)  in sis_update_voice()
216 				sis_update_sso(voice, voice->vperiod);  in sis_update_voice()
218 				sis_update_sso(voice, voice->period_size);  in sis_update_voice()
227 		sync = voice->sync_cso;  in sis_update_voice()
228 		sync -= readw(voice->sync_base + SIS_CAPTURE_DMA_FORMAT_CSO);  in sis_update_voice()
229 		if (sync > (voice->sync_buffer_size / 2))  in sis_update_voice()
230 			sync -= voice->sync_buffer_size;  in sis_update_voice()
240 			sis_update_sso(voice, sync);  in sis_update_voice()
260 			voice->vperiod = voice->sync_period_size + 1;  in sis_update_voice()
262 			voice->vperiod = voice->sync_period_size + sync + 10;  in sis_update_voice()
264 		if (voice->vperiod < voice->buffer_size) {  in sis_update_voice()
265 			sis_update_sso(voice, voice->vperiod);  in sis_update_voice()
266 			voice->vperiod = 0;  in sis_update_voice()
268 			sis_update_sso(voice, voice->period_size);  in sis_update_voice()
270 		sync = voice->sync_cso + voice->sync_period_size;  in sis_update_voice()
271 		if (sync >= voice->sync_buffer_size)  in sis_update_voice()
272 			sync -= voice->sync_buffer_size;  in sis_update_voice()
273 		voice->sync_cso = sync;  in sis_update_voice()
276 	snd_pcm_period_elapsed(voice->substream);  in sis_update_voice()
279 static void sis_voice_irq(u32 status, struct voice *voice)  in sis_voice_irq()  argument
286 		voice += bit;  in sis_voice_irq()
287 		sis_update_voice(voice);  in sis_voice_irq()
288 		voice++;  in sis_voice_irq()
296 	struct voice *voice;  in sis_interrupt()  local
326 			voice = &sis->capture_voice;  in sis_interrupt()
327 			if (!voice->timing)  in sis_interrupt()
328 				snd_pcm_period_elapsed(voice->substream);  in sis_interrupt()
384 static void sis_free_voice(struct sis7019 *sis, struct voice *voice)  in sis_free_voice()  argument
389 	if (voice->timing) {  in sis_free_voice()
391 		voice->timing->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING |  in sis_free_voice()
393 		voice->timing = NULL;  in sis_free_voice()
395 	voice->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING | VOICE_SYNC_TIMING);  in sis_free_voice()
399 static struct voice *__sis_alloc_playback_voice(struct sis7019 *sis)  in __sis_alloc_playback_voice()
402 	struct voice *voice;  in __sis_alloc_playback_voice()  local
406 		voice = &sis->voices[i];  in __sis_alloc_playback_voice()
407 		if (voice->flags & VOICE_IN_USE)  in __sis_alloc_playback_voice()
409 		voice->flags |= VOICE_IN_USE;  in __sis_alloc_playback_voice()
412 	voice = NULL;  in __sis_alloc_playback_voice()
415 	return voice;  in __sis_alloc_playback_voice()
418 static struct voice *sis_alloc_playback_voice(struct sis7019 *sis)  in sis_alloc_playback_voice()
420 	struct voice *voice;  in sis_alloc_playback_voice()  local
424 	voice = __sis_alloc_playback_voice(sis);  in sis_alloc_playback_voice()
427 	return voice;  in sis_alloc_playback_voice()
435 	struct voice *voice = runtime->private_data;  in sis_alloc_timing_voice()  local
441 	 * timing voice, as we can use the capture channel's interrupts  in sis_alloc_timing_voice()
449 	if (needed && !voice->timing) {  in sis_alloc_timing_voice()
451 		voice->timing = __sis_alloc_playback_voice(sis);  in sis_alloc_timing_voice()
452 		if (voice->timing)  in sis_alloc_timing_voice()
455 		if (!voice->timing)  in sis_alloc_timing_voice()
457 		voice->timing->substream = substream;  in sis_alloc_timing_voice()
458 	} else if (!needed && voice->timing) {  in sis_alloc_timing_voice()
459 		sis_free_voice(sis, voice);  in sis_alloc_timing_voice()
460 		voice->timing = NULL;  in sis_alloc_timing_voice()
470 	struct voice *voice;  in sis_playback_open()  local
472 	voice = sis_alloc_playback_voice(sis);  in sis_playback_open()
473 	if (!voice)  in sis_playback_open()
476 	voice->substream = substream;  in sis_playback_open()
477 	runtime->private_data = voice;  in sis_playback_open()
491 	struct voice *voice = runtime->private_data;  in sis_substream_close()  local
493 	sis_free_voice(sis, voice);  in sis_substream_close()
500 	struct voice *voice = runtime->private_data;  in sis_pcm_playback_prepare()  local
501 	void __iomem *ctrl_base = voice->ctrl_base;  in sis_pcm_playback_prepare()
502 	void __iomem *wave_base = voice->wave_base;  in sis_pcm_playback_prepare()
528 		voice->flags |= VOICE_SSO_TIMING;  in sis_pcm_playback_prepare()
529 		voice->sso = runtime->period_size - 1;  in sis_pcm_playback_prepare()
530 		voice->period_size = runtime->period_size;  in sis_pcm_playback_prepare()
531 		voice->buffer_size = runtime->buffer_size;  in sis_pcm_playback_prepare()
568 	struct voice *voice;  in sis_pcm_trigger()  local
599 		voice = s->runtime->private_data;  in sis_pcm_trigger()
600 		if (voice->flags & VOICE_CAPTURE) {  in sis_pcm_trigger()
601 			record |= 1 << voice->num;  in sis_pcm_trigger()
602 			voice = voice->timing;  in sis_pcm_trigger()
605 		/* voice could be NULL if this a recording stream, and it  in sis_pcm_trigger()
608 		if (voice)  in sis_pcm_trigger()
609 			play[voice->num / 32] |= 1 << (voice->num & 0x1f);  in sis_pcm_trigger()
635 	struct voice *voice = runtime->private_data;  in sis_pcm_pointer()  local
638 	cso = readl(voice->ctrl_base + SIS_PLAY_DMA_FORMAT_CSO);  in sis_pcm_pointer()
647 	struct voice *voice = &sis->capture_voice;  in sis_capture_open()  local
654 	if (voice->flags & VOICE_IN_USE)  in sis_capture_open()
655 		voice = NULL;  in sis_capture_open()
657 		voice->flags |= VOICE_IN_USE;  in sis_capture_open()
660 	if (!voice)  in sis_capture_open()
663 	voice->substream = substream;  in sis_capture_open()
664 	runtime->private_data = voice;  in sis_capture_open()
693 static void sis_prepare_timing_voice(struct voice *voice,  in sis_prepare_timing_voice()  argument
698 	struct voice *timing = voice->timing;  in sis_prepare_timing_voice()
752 	timing->sync_base = voice->ctrl_base;  in sis_prepare_timing_voice()
799 	struct voice *voice = runtime->private_data;  in sis_pcm_capture_prepare()  local
800 	void __iomem *rec_base = voice->ctrl_base;  in sis_pcm_capture_prepare()
820 	 * use a timing voice to clock out the periods. Otherwise, we can  in sis_pcm_capture_prepare()
823 	if (voice->timing) {  in sis_pcm_capture_prepare()
824 		sis_prepare_timing_voice(voice, substream);  in sis_pcm_capture_prepare()
1255 	struct voice *voice;  in sis_chip_create()  local
1311 		voice = &sis->voices[i];  in sis_chip_create()
1312 		voice->num = i;  in sis_chip_create()
1313 		voice->ctrl_base = SIS_PLAY_DMA_ADDR(sis->ioaddr, i);  in sis_chip_create()
1314 		voice->wave_base = SIS_WAVE_ADDR(sis->ioaddr, i);  in sis_chip_create()
1317 	voice = &sis->capture_voice;  in sis_chip_create()
1318 	voice->flags = VOICE_CAPTURE;  in sis_chip_create()
1319 	voice->num = SIS_CAPTURE_CHAN_AC97_PCM_IN;  in sis_chip_create()
1320 	voice->ctrl_base = SIS_CAPTURE_DMA_ADDR(sis->ioaddr, voice->num);  in sis_chip_create()