18  * Thanks to the AMD engineer who was able to get us the AMD79C30
347 /* Idle the AMD7930 chip.  The amd->lock is not held.  */
348 static __inline__ void amd7930_idle(struct snd_amd7930 *amd)  in amd7930_idle()  argument
352 	spin_lock_irqsave(&amd->lock, flags);  in amd7930_idle()
353 	sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);  in amd7930_idle()
354 	sbus_writeb(0, amd->regs + AMD7930_DR);  in amd7930_idle()
355 	spin_unlock_irqrestore(&amd->lock, flags);  in amd7930_idle()
358 /* Enable chip interrupts.  The amd->lock is not held.  */
359 static __inline__ void amd7930_enable_ints(struct snd_amd7930 *amd)  in amd7930_enable_ints()  argument
363 	spin_lock_irqsave(&amd->lock, flags);  in amd7930_enable_ints()
364 	sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);  in amd7930_enable_ints()
365 	sbus_writeb(AM_INIT_ACTIVE, amd->regs + AMD7930_DR);  in amd7930_enable_ints()
366 	spin_unlock_irqrestore(&amd->lock, flags);  in amd7930_enable_ints()
369 /* Disable chip interrupts.  The amd->lock is not held.  */
370 static __inline__ void amd7930_disable_ints(struct snd_amd7930 *amd)  in amd7930_disable_ints()  argument
374 	spin_lock_irqsave(&amd->lock, flags);  in amd7930_disable_ints()
375 	sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);  in amd7930_disable_ints()
376 	sbus_writeb(AM_INIT_ACTIVE | AM_INIT_DISABLE_INTS, amd->regs + AMD7930_DR);  in amd7930_disable_ints()
377 	spin_unlock_irqrestore(&amd->lock, flags);  in amd7930_disable_ints()
381  * The amd->lock is held and local interrupts are disabled.
383 static void __amd7930_write_map(struct snd_amd7930 *amd)  in __amd7930_write_map()  argument
385 	struct amd7930_map *map = &amd->map;  in __amd7930_write_map()
387 	sbus_writeb(AMR_MAP_GX, amd->regs + AMD7930_CR);  in __amd7930_write_map()
388 	sbus_writeb(((map->gx >> 0) & 0xff), amd->regs + AMD7930_DR);  in __amd7930_write_map()
389 	sbus_writeb(((map->gx >> 8) & 0xff), amd->regs + AMD7930_DR);  in __amd7930_write_map()
391 	sbus_writeb(AMR_MAP_GR, amd->regs + AMD7930_CR);  in __amd7930_write_map()
392 	sbus_writeb(((map->gr >> 0) & 0xff), amd->regs + AMD7930_DR);  in __amd7930_write_map()
393 	sbus_writeb(((map->gr >> 8) & 0xff), amd->regs + AMD7930_DR);  in __amd7930_write_map()
395 	sbus_writeb(AMR_MAP_STGR, amd->regs + AMD7930_CR);  in __amd7930_write_map()
396 	sbus_writeb(((map->stgr >> 0) & 0xff), amd->regs + AMD7930_DR);  in __amd7930_write_map()
397 	sbus_writeb(((map->stgr >> 8) & 0xff), amd->regs + AMD7930_DR);  in __amd7930_write_map()
399 	sbus_writeb(AMR_MAP_GER, amd->regs + AMD7930_CR);  in __amd7930_write_map()
400 	sbus_writeb(((map->ger >> 0) & 0xff), amd->regs + AMD7930_DR);  in __amd7930_write_map()
401 	sbus_writeb(((map->ger >> 8) & 0xff), amd->regs + AMD7930_DR);  in __amd7930_write_map()
403 	sbus_writeb(AMR_MAP_MMR1, amd->regs + AMD7930_CR);  in __amd7930_write_map()
404 	sbus_writeb(map->mmr1, amd->regs + AMD7930_DR);  in __amd7930_write_map()
406 	sbus_writeb(AMR_MAP_MMR2, amd->regs + AMD7930_CR);  in __amd7930_write_map()
407 	sbus_writeb(map->mmr2, amd->regs + AMD7930_DR);  in __amd7930_write_map()
475  * The amd->lock is held and local interrupts are disabled.
477 static void __amd7930_update_map(struct snd_amd7930 *amd)  in __amd7930_update_map()  argument
479 	struct amd7930_map *map = &amd->map;  in __amd7930_update_map()
482 	map->gx = gx_coeff[amd->rgain];  in __amd7930_update_map()
483 	map->stgr = gx_coeff[amd->mgain];  in __amd7930_update_map()
484 	level = (amd->pgain * (256 + ARRAY_SIZE(ger_coeff))) >> 8;  in __amd7930_update_map()
492 	__amd7930_write_map(amd);  in __amd7930_update_map()
497 	struct snd_amd7930 *amd = dev_id;  in snd_amd7930_interrupt()  local
501 	spin_lock(&amd->lock);  in snd_amd7930_interrupt()
505 	ir = sbus_readb(amd->regs + AMD7930_IR);  in snd_amd7930_interrupt()
509 		if (amd->flags & AMD7930_FLAG_PLAYBACK) {  in snd_amd7930_interrupt()
510 			if (amd->p_left > 0) {  in snd_amd7930_interrupt()
511 				byte = *(amd->p_cur++);  in snd_amd7930_interrupt()
512 				amd->p_left--;  in snd_amd7930_interrupt()
513 				sbus_writeb(byte, amd->regs + AMD7930_BBTB);  in snd_amd7930_interrupt()
514 				if (amd->p_left == 0)  in snd_amd7930_interrupt()
517 				sbus_writeb(0, amd->regs + AMD7930_BBTB);  in snd_amd7930_interrupt()
518 		} else if (amd->flags & AMD7930_FLAG_CAPTURE) {  in snd_amd7930_interrupt()
519 			byte = sbus_readb(amd->regs + AMD7930_BBRB);  in snd_amd7930_interrupt()
520 			if (amd->c_left > 0) {  in snd_amd7930_interrupt()
521 				*(amd->c_cur++) = byte;  in snd_amd7930_interrupt()
522 				amd->c_left--;  in snd_amd7930_interrupt()
523 				if (amd->c_left == 0)  in snd_amd7930_interrupt()
528 	spin_unlock(&amd->lock);  in snd_amd7930_interrupt()
531 		snd_pcm_period_elapsed(amd->playback_substream);  in snd_amd7930_interrupt()
533 		snd_pcm_period_elapsed(amd->capture_substream);  in snd_amd7930_interrupt()
538 static int snd_amd7930_trigger(struct snd_amd7930 *amd, unsigned int flag, int cmd)  in snd_amd7930_trigger()  argument
543 	spin_lock_irqsave(&amd->lock, flags);  in snd_amd7930_trigger()
545 		if (!(amd->flags & flag)) {  in snd_amd7930_trigger()
546 			amd->flags |= flag;  in snd_amd7930_trigger()
549 			sbus_writeb(AMR_MUX_MCR4, amd->regs + AMD7930_CR);  in snd_amd7930_trigger()
550 			sbus_writeb(AM_MUX_MCR4_ENABLE_INTS, amd->regs + AMD7930_DR);  in snd_amd7930_trigger()
553 		if (amd->flags & flag) {  in snd_amd7930_trigger()
554 			amd->flags &= ~flag;  in snd_amd7930_trigger()
557 			sbus_writeb(AMR_MUX_MCR4, amd->regs + AMD7930_CR);  in snd_amd7930_trigger()
558 			sbus_writeb(0, amd->regs + AMD7930_DR);  in snd_amd7930_trigger()
563 	spin_unlock_irqrestore(&amd->lock, flags);  in snd_amd7930_trigger()
571 	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);  in snd_amd7930_playback_trigger()  local
572 	return snd_amd7930_trigger(amd, AMD7930_FLAG_PLAYBACK, cmd);  in snd_amd7930_playback_trigger()
578 	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);  in snd_amd7930_capture_trigger()  local
579 	return snd_amd7930_trigger(amd, AMD7930_FLAG_CAPTURE, cmd);  in snd_amd7930_capture_trigger()
584 	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);  in snd_amd7930_playback_prepare()  local
590 	spin_lock_irqsave(&amd->lock, flags);  in snd_amd7930_playback_prepare()
592 	amd->flags |= AMD7930_FLAG_PLAYBACK;  in snd_amd7930_playback_prepare()
595 	amd->p_orig = amd->p_cur = runtime->dma_area;  in snd_amd7930_playback_prepare()
596 	amd->p_left = size;  in snd_amd7930_playback_prepare()
599 	new_mmr1 = amd->map.mmr1;  in snd_amd7930_playback_prepare()
604 	if (new_mmr1 != amd->map.mmr1) {  in snd_amd7930_playback_prepare()
605 		amd->map.mmr1 = new_mmr1;  in snd_amd7930_playback_prepare()
606 		__amd7930_update_map(amd);  in snd_amd7930_playback_prepare()
609 	spin_unlock_irqrestore(&amd->lock, flags);  in snd_amd7930_playback_prepare()
616 	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);  in snd_amd7930_capture_prepare()  local
622 	spin_lock_irqsave(&amd->lock, flags);  in snd_amd7930_capture_prepare()
624 	amd->flags |= AMD7930_FLAG_CAPTURE;  in snd_amd7930_capture_prepare()
627 	amd->c_orig = amd->c_cur = runtime->dma_area;  in snd_amd7930_capture_prepare()
628 	amd->c_left = size;  in snd_amd7930_capture_prepare()
631 	new_mmr1 = amd->map.mmr1;  in snd_amd7930_capture_prepare()
636 	if (new_mmr1 != amd->map.mmr1) {  in snd_amd7930_capture_prepare()
637 		amd->map.mmr1 = new_mmr1;  in snd_amd7930_capture_prepare()
638 		__amd7930_update_map(amd);  in snd_amd7930_capture_prepare()
641 	spin_unlock_irqrestore(&amd->lock, flags);  in snd_amd7930_capture_prepare()
648 	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);  in snd_amd7930_playback_pointer()  local
651 	if (!(amd->flags & AMD7930_FLAG_PLAYBACK))  in snd_amd7930_playback_pointer()
653 	ptr = amd->p_cur - amd->p_orig;  in snd_amd7930_playback_pointer()
659 	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);  in snd_amd7930_capture_pointer()  local
662 	if (!(amd->flags & AMD7930_FLAG_CAPTURE))  in snd_amd7930_capture_pointer()
665 	ptr = amd->c_cur - amd->c_orig;  in snd_amd7930_capture_pointer()
692 	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);  in snd_amd7930_playback_open()  local
695 	amd->playback_substream = substream;  in snd_amd7930_playback_open()
702 	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);  in snd_amd7930_capture_open()  local
705 	amd->capture_substream = substream;  in snd_amd7930_capture_open()
712 	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);  in snd_amd7930_playback_close()  local
714 	amd->playback_substream = NULL;  in snd_amd7930_playback_close()
720 	struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);  in snd_amd7930_capture_close()  local
722 	amd->capture_substream = NULL;  in snd_amd7930_capture_close()
742 static int snd_amd7930_pcm(struct snd_amd7930 *amd)  in snd_amd7930_pcm()  argument
747 	if ((err = snd_pcm_new(amd->card,  in snd_amd7930_pcm()
757 	pcm->private_data = amd;  in snd_amd7930_pcm()
759 	strcpy(pcm->name, amd->card->shortname);  in snd_amd7930_pcm()
760 	amd->pcm = pcm;  in snd_amd7930_pcm()
784 	struct snd_amd7930 *amd = snd_kcontrol_chip(kctl);  in snd_amd7930_get_volume()  local
790 		swval = &amd->mgain;  in snd_amd7930_get_volume()
793 		swval = &amd->rgain;  in snd_amd7930_get_volume()
797 		swval = &amd->pgain;  in snd_amd7930_get_volume()
808 	struct snd_amd7930 *amd = snd_kcontrol_chip(kctl);  in snd_amd7930_put_volume()  local
815 		swval = &amd->mgain;  in snd_amd7930_put_volume()
818 		swval = &amd->rgain;  in snd_amd7930_put_volume()
822 		swval = &amd->pgain;  in snd_amd7930_put_volume()
826 	spin_lock_irqsave(&amd->lock, flags);  in snd_amd7930_put_volume()
830 		__amd7930_update_map(amd);  in snd_amd7930_put_volume()
835 	spin_unlock_irqrestore(&amd->lock, flags);  in snd_amd7930_put_volume()
870 static int snd_amd7930_mixer(struct snd_amd7930 *amd)  in snd_amd7930_mixer()  argument
875 	if (snd_BUG_ON(!amd || !amd->card))  in snd_amd7930_mixer()
878 	card = amd->card;  in snd_amd7930_mixer()
883 				       snd_ctl_new1(&amd7930_controls[idx], amd))) < 0)  in snd_amd7930_mixer()
890 static int snd_amd7930_free(struct snd_amd7930 *amd)  in snd_amd7930_free()  argument
892 	struct platform_device *op = amd->op;  in snd_amd7930_free()
894 	amd7930_idle(amd);  in snd_amd7930_free()
896 	if (amd->irq)  in snd_amd7930_free()
897 		free_irq(amd->irq, amd);  in snd_amd7930_free()
899 	if (amd->regs)  in snd_amd7930_free()
900 		of_iounmap(&op->resource[0], amd->regs,  in snd_amd7930_free()
903 	kfree(amd);  in snd_amd7930_free()
910 	struct snd_amd7930 *amd = device->device_data;  in snd_amd7930_dev_free()  local
912 	return snd_amd7930_free(amd);  in snd_amd7930_dev_free()
924 	struct snd_amd7930 *amd;  in snd_amd7930_create()  local
929 	amd = kzalloc(sizeof(*amd), GFP_KERNEL);  in snd_amd7930_create()
930 	if (amd == NULL)  in snd_amd7930_create()
933 	spin_lock_init(&amd->lock);  in snd_amd7930_create()
934 	amd->card = card;  in snd_amd7930_create()
935 	amd->op = op;  in snd_amd7930_create()
937 	amd->regs = of_ioremap(&op->resource[0], 0,  in snd_amd7930_create()
939 	if (!amd->regs) {  in snd_amd7930_create()
942 		kfree(amd);  in snd_amd7930_create()
946 	amd7930_idle(amd);  in snd_amd7930_create()
949 			IRQF_SHARED, "amd7930", amd)) {  in snd_amd7930_create()
952 		snd_amd7930_free(amd);  in snd_amd7930_create()
955 	amd->irq = irq;  in snd_amd7930_create()
957 	amd7930_enable_ints(amd);  in snd_amd7930_create()
959 	spin_lock_irqsave(&amd->lock, flags);  in snd_amd7930_create()
961 	amd->rgain = 128;  in snd_amd7930_create()
962 	amd->pgain = 200;  in snd_amd7930_create()
963 	amd->mgain = 0;  in snd_amd7930_create()
965 	memset(&amd->map, 0, sizeof(amd->map));  in snd_amd7930_create()
966 	amd->map.mmr1 = (AM_MAP_MMR1_GX | AM_MAP_MMR1_GER |  in snd_amd7930_create()
968 	amd->map.mmr2 = (AM_MAP_MMR2_LS | AM_MAP_MMR2_AINB);  in snd_amd7930_create()
970 	__amd7930_update_map(amd);  in snd_amd7930_create()
973 	sbus_writeb(AMR_MUX_MCR1, amd->regs + AMD7930_CR);  in snd_amd7930_create()
975 		    amd->regs + AMD7930_DR);  in snd_amd7930_create()
977 	spin_unlock_irqrestore(&amd->lock, flags);  in snd_amd7930_create()
980 				  amd, &snd_amd7930_dev_ops)) < 0) {  in snd_amd7930_create()
981 		snd_amd7930_free(amd);  in snd_amd7930_create()
985 	*ramd = amd;  in snd_amd7930_create()
994 	struct snd_amd7930 *amd;  in amd7930_sbus_probe()  local
1020 				      irq, dev_num, &amd)) < 0)  in amd7930_sbus_probe()
1023 	if ((err = snd_amd7930_pcm(amd)) < 0)  in amd7930_sbus_probe()
1026 	if ((err = snd_amd7930_mixer(amd)) < 0)  in amd7930_sbus_probe()
1032 	amd->next = amd7930_list;  in amd7930_sbus_probe()
1033 	amd7930_list = amd;  in amd7930_sbus_probe()