1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *   ALSA driver for ATI IXP 150/200/250 AC97 modem controllers
24 MODULE_DESCRIPTION("ATI IXP MC97 controller");
26 MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250}}");
28 static int index = -2; /* Exclude the first card */
33 MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
35 MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
215 	int ac97_pcm_type;	/* index # of ac97_pcm to access, -1 = not used */
219  * ATI IXP chip
251 	{ PCI_VDEVICE(ATI, 0x434d), 0 }, /* SB200 */
252 	{ PCI_VDEVICE(ATI, 0x4378), 0 }, /* SB400 */
270 	void __iomem *addr = chip->remap_addr + reg;  in snd_atiixp_update_bits()
285 	writel(value, chip->remap_addr + ATI_REG_##reg)
287 	readl(chip->remap_addr + ATI_REG_##reg)
295  * in a future version, a scatter-gather buffer should be implemented.
321 		return -ENOMEM;  in atiixp_build_dma_packets()
323 	if (dma->desc_buf.area == NULL) {  in atiixp_build_dma_packets()
324 		if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev,  in atiixp_build_dma_packets()
325 					ATI_DESC_LIST_SIZE, &dma->desc_buf) < 0)  in atiixp_build_dma_packets()
326 			return -ENOMEM;  in atiixp_build_dma_packets()
327 		dma->period_bytes = dma->periods = 0; /* clear */  in atiixp_build_dma_packets()
330 	if (dma->periods == periods && dma->period_bytes == period_bytes)  in atiixp_build_dma_packets()
334 	spin_lock_irqsave(&chip->reg_lock, flags);  in atiixp_build_dma_packets()
335 	writel(0, chip->remap_addr + dma->ops->llp_offset);  in atiixp_build_dma_packets()
336 	dma->ops->enable_dma(chip, 0);  in atiixp_build_dma_packets()
337 	dma->ops->enable_dma(chip, 1);  in atiixp_build_dma_packets()
338 	spin_unlock_irqrestore(&chip->reg_lock, flags);  in atiixp_build_dma_packets()
341 	addr = (u32)substream->runtime->dma_addr;  in atiixp_build_dma_packets()
342 	desc_addr = (u32)dma->desc_buf.addr;  in atiixp_build_dma_packets()
345 		desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];  in atiixp_build_dma_packets()
346 		desc->addr = cpu_to_le32(addr);  in atiixp_build_dma_packets()
347 		desc->status = 0;  in atiixp_build_dma_packets()
348 		desc->size = period_bytes >> 2; /* in dwords */  in atiixp_build_dma_packets()
350 		if (i == periods - 1)  in atiixp_build_dma_packets()
351 			desc->next = cpu_to_le32((u32)dma->desc_buf.addr);  in atiixp_build_dma_packets()
353 			desc->next = cpu_to_le32(desc_addr);  in atiixp_build_dma_packets()
357 	writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,  in atiixp_build_dma_packets()
358 	       chip->remap_addr + dma->ops->llp_offset);  in atiixp_build_dma_packets()
360 	dma->period_bytes = period_bytes;  in atiixp_build_dma_packets()
361 	dma->periods = periods;  in atiixp_build_dma_packets()
373 	if (dma->desc_buf.area) {  in atiixp_clear_dma_packets()
374 		writel(0, chip->remap_addr + dma->ops->llp_offset);  in atiixp_clear_dma_packets()
375 		snd_dma_free_pages(&dma->desc_buf);  in atiixp_clear_dma_packets()
376 		dma->desc_buf.area = NULL;  in atiixp_clear_dma_packets()
388 		if (! timeout--) {  in snd_atiixp_acquire_codec()
389 			dev_warn(chip->card->dev, "codec acquire timeout\n");  in snd_atiixp_acquire_codec()
390 			return -EBUSY;  in snd_atiixp_acquire_codec()
419 	} while (--timeout);  in snd_atiixp_codec_read()
422 		dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg);  in snd_atiixp_codec_read()
445 	struct atiixp_modem *chip = ac97->private_data;  in snd_atiixp_ac97_read()
446 	return snd_atiixp_codec_read(chip, ac97->num, reg);  in snd_atiixp_ac97_read()
453 	struct atiixp_modem *chip = ac97->private_data;  in snd_atiixp_ac97_write()
459 	snd_atiixp_codec_write(chip, ac97->num, reg, val);  in snd_atiixp_ac97_write()
487 		if (!--timeout) {  in snd_atiixp_aclink_reset()
488 			dev_err(chip->card->dev, "codec reset timeout\n");  in snd_atiixp_aclink_reset()
504 	//	return -EBUSY;  in snd_atiixp_aclink_down()
513  * auto-detection of codecs
515  * the IXP chip can generate interrupts for the non-existing codecs.
530 	chip->codec_not_ready_bits = 0;  in snd_atiixp_codec_detect()
534 	while (timeout-- > 0) {  in snd_atiixp_codec_detect()
536 		if (chip->codec_not_ready_bits)  in snd_atiixp_codec_detect()
541 	if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {  in snd_atiixp_codec_detect()
542 		dev_err(chip->card->dev, "no codec detected!\n");  in snd_atiixp_codec_detect()
543 		return -ENXIO;  in snd_atiixp_codec_detect()
556 	/* set up spdif, enable burst mode */  in snd_atiixp_chip_start()
593  * position.  when SG-buffer is implemented, the offset must be calculated
599 	struct snd_pcm_runtime *runtime = substream->runtime;  in snd_atiixp_pcm_pointer()
600 	struct atiixp_dma *dma = runtime->private_data;  in snd_atiixp_pcm_pointer()
604 	while (timeout--) {  in snd_atiixp_pcm_pointer()
605 		curptr = readl(chip->remap_addr + dma->ops->dt_cur);  in snd_atiixp_pcm_pointer()
606 		if (curptr < dma->buf_addr)  in snd_atiixp_pcm_pointer()
608 		curptr -= dma->buf_addr;  in snd_atiixp_pcm_pointer()
609 		if (curptr >= dma->buf_bytes)  in snd_atiixp_pcm_pointer()
613 	dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n",  in snd_atiixp_pcm_pointer()
614 		   readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);  in snd_atiixp_pcm_pointer()
624 	if (! dma->substream || ! dma->running)  in snd_atiixp_xrun_dma()
626 	dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type);  in snd_atiixp_xrun_dma()
627 	snd_pcm_stop_xrun(dma->substream);  in snd_atiixp_xrun_dma()
636 	if (! dma->substream || ! dma->running)  in snd_atiixp_update_dma()
638 	snd_pcm_period_elapsed(dma->substream);  in snd_atiixp_update_dma()
660 	struct atiixp_dma *dma = substream->runtime->private_data;  in snd_atiixp_pcm_trigger()
663 	if (snd_BUG_ON(!dma->ops->enable_transfer ||  in snd_atiixp_pcm_trigger()
664 		       !dma->ops->flush_dma))  in snd_atiixp_pcm_trigger()
665 		return -EINVAL;  in snd_atiixp_pcm_trigger()
667 	spin_lock(&chip->reg_lock);  in snd_atiixp_pcm_trigger()
670 		dma->ops->enable_transfer(chip, 1);  in snd_atiixp_pcm_trigger()
671 		dma->running = 1;  in snd_atiixp_pcm_trigger()
674 		dma->ops->enable_transfer(chip, 0);  in snd_atiixp_pcm_trigger()
675 		dma->running = 0;  in snd_atiixp_pcm_trigger()
678 		err = -EINVAL;  in snd_atiixp_pcm_trigger()
684 		dma->ops->flush_dma(chip);  in snd_atiixp_pcm_trigger()
688 	spin_unlock(&chip->reg_lock);  in snd_atiixp_pcm_trigger()
696  * every callback is supposed to be called in chip->reg_lock spinlock
759 	spin_lock_irq(&chip->reg_lock);  in snd_atiixp_playback_prepare()
765 	spin_unlock_irq(&chip->reg_lock);  in snd_atiixp_playback_prepare()
776  * hw_params - allocate the buffer and set up buffer descriptors
782 	struct atiixp_dma *dma = substream->runtime->private_data;  in snd_atiixp_pcm_hw_params()
786 	dma->buf_addr = substream->runtime->dma_addr;  in snd_atiixp_pcm_hw_params()
787 	dma->buf_bytes = params_buffer_bytes(hw_params);  in snd_atiixp_pcm_hw_params()
797 		if (! chip->ac97[i])  in snd_atiixp_pcm_hw_params()
799 		snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));  in snd_atiixp_pcm_hw_params()
800 		snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);  in snd_atiixp_pcm_hw_params()
809 	struct atiixp_dma *dma = substream->runtime->private_data;  in snd_atiixp_pcm_hw_free()
843 	struct snd_pcm_runtime *runtime = substream->runtime;  in snd_atiixp_pcm_open()
852 	if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))  in snd_atiixp_pcm_open()
853 		return -EINVAL;  in snd_atiixp_pcm_open()
855 	if (dma->opened)  in snd_atiixp_pcm_open()
856 		return -EBUSY;  in snd_atiixp_pcm_open()
857 	dma->substream = substream;  in snd_atiixp_pcm_open()
858 	runtime->hw = snd_atiixp_pcm_hw;  in snd_atiixp_pcm_open()
859 	dma->ac97_pcm_type = pcm_type;  in snd_atiixp_pcm_open()
867 	runtime->private_data = dma;  in snd_atiixp_pcm_open()
870 	spin_lock_irq(&chip->reg_lock);  in snd_atiixp_pcm_open()
871 	dma->ops->enable_dma(chip, 1);  in snd_atiixp_pcm_open()
872 	spin_unlock_irq(&chip->reg_lock);  in snd_atiixp_pcm_open()
873 	dma->opened = 1;  in snd_atiixp_pcm_open()
883 	if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))  in snd_atiixp_pcm_close()
884 		return -EINVAL;  in snd_atiixp_pcm_close()
885 	spin_lock_irq(&chip->reg_lock);  in snd_atiixp_pcm_close()
886 	dma->ops->enable_dma(chip, 0);  in snd_atiixp_pcm_close()
887 	spin_unlock_irq(&chip->reg_lock);  in snd_atiixp_pcm_close()
888 	dma->substream = NULL;  in snd_atiixp_pcm_close()
889 	dma->opened = 0;  in snd_atiixp_pcm_close()
900 	mutex_lock(&chip->open_mutex);  in snd_atiixp_playback_open()
901 	err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);  in snd_atiixp_playback_open()
902 	mutex_unlock(&chip->open_mutex);  in snd_atiixp_playback_open()
912 	mutex_lock(&chip->open_mutex);  in snd_atiixp_playback_close()
913 	err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);  in snd_atiixp_playback_close()
914 	mutex_unlock(&chip->open_mutex);  in snd_atiixp_playback_close()
921 	return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);  in snd_atiixp_capture_open()
927 	return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);  in snd_atiixp_capture_close()
977 	chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;  in snd_atiixp_pcm_new()
978 	chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;  in snd_atiixp_pcm_new()
981 	err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);  in snd_atiixp_pcm_new()
986 	pcm->dev_class = SNDRV_PCM_CLASS_MODEM;  in snd_atiixp_pcm_new()
987 	pcm->private_data = chip;  in snd_atiixp_pcm_new()
988 	strcpy(pcm->name, "ATI IXP MC97");  in snd_atiixp_pcm_new()
989 	chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;  in snd_atiixp_pcm_new()
992 				       &chip->pci->dev, 64*1024, 128*1024);  in snd_atiixp_pcm_new()
1014 		snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_PLAYBACK]);  in snd_atiixp_interrupt()
1016 		snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);  in snd_atiixp_interrupt()
1018 		snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_CAPTURE]);  in snd_atiixp_interrupt()
1020 		snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);  in snd_atiixp_interrupt()
1026 		spin_lock(&chip->reg_lock);  in snd_atiixp_interrupt()
1027 		chip->codec_not_ready_bits |= detected;  in snd_atiixp_interrupt()
1029 		spin_unlock(&chip->reg_lock);  in snd_atiixp_interrupt()
1060 		return -ENXIO;  in snd_atiixp_mixer_new()
1062 	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)  in snd_atiixp_mixer_new()
1064 	pbus->clock = clock;  in snd_atiixp_mixer_new()
1065 	chip->ac97_bus = pbus;  in snd_atiixp_mixer_new()
1069 		if (chip->codec_not_ready_bits & codec_skip[i])  in snd_atiixp_mixer_new()
1073 		ac97.pci = chip->pci;  in snd_atiixp_mixer_new()
1076 		if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {  in snd_atiixp_mixer_new()
1077 			chip->ac97[i] = NULL; /* to be sure */  in snd_atiixp_mixer_new()
1078 			dev_dbg(chip->card->dev,  in snd_atiixp_mixer_new()
1086 		dev_err(chip->card->dev, "no codec available\n");  in snd_atiixp_mixer_new()
1087 		return -ENODEV;  in snd_atiixp_mixer_new()
1090 	/* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */  in snd_atiixp_mixer_new()
1103 	struct atiixp_modem *chip = card->private_data;  in snd_atiixp_suspend()
1108 		snd_ac97_suspend(chip->ac97[i]);  in snd_atiixp_suspend()
1117 	struct atiixp_modem *chip = card->private_data;  in snd_atiixp_resume()
1124 		snd_ac97_resume(chip->ac97[i]);  in snd_atiixp_resume()
1143 	struct atiixp_modem *chip = entry->private_data;  in snd_atiixp_proc_read()
1147 		snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));  in snd_atiixp_proc_read()
1152 	snd_card_ro_proc_new(chip->card, "atiixp-modem", chip,  in snd_atiixp_proc_init()
1163 	if (chip->irq < 0)  in snd_atiixp_free()
1168 	if (chip->irq >= 0)  in snd_atiixp_free()
1169 		free_irq(chip->irq, chip);  in snd_atiixp_free()
1170 	iounmap(chip->remap_addr);  in snd_atiixp_free()
1171 	pci_release_regions(chip->pci);  in snd_atiixp_free()
1172 	pci_disable_device(chip->pci);  in snd_atiixp_free()
1179 	struct atiixp_modem *chip = device->device_data;  in snd_atiixp_dev_free()
1202 		return -ENOMEM;  in snd_atiixp_create()
1205 	spin_lock_init(&chip->reg_lock);  in snd_atiixp_create()
1206 	mutex_init(&chip->open_mutex);  in snd_atiixp_create()
1207 	chip->card = card;  in snd_atiixp_create()
1208 	chip->pci = pci;  in snd_atiixp_create()
1209 	chip->irq = -1;  in snd_atiixp_create()
1210 	if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) {  in snd_atiixp_create()
1215 	chip->addr = pci_resource_start(pci, 0);  in snd_atiixp_create()
1216 	chip->remap_addr = pci_ioremap_bar(pci, 0);  in snd_atiixp_create()
1217 	if (chip->remap_addr == NULL) {  in snd_atiixp_create()
1218 		dev_err(card->dev, "AC'97 space ioremap problem\n");  in snd_atiixp_create()
1220 		return -EIO;  in snd_atiixp_create()
1223 	if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED,  in snd_atiixp_create()
1225 		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);  in snd_atiixp_create()
1227 		return -EBUSY;  in snd_atiixp_create()
1229 	chip->irq = pci->irq;  in snd_atiixp_create()
1230 	card->sync_irq = chip->irq;  in snd_atiixp_create()
1250 	err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);  in snd_atiixp_probe()
1254 	strcpy(card->driver, "ATIIXP-MODEM");  in snd_atiixp_probe()
1255 	strcpy(card->shortname, "ATI IXP Modem");  in snd_atiixp_probe()
1258 	card->private_data = chip;  in snd_atiixp_probe()
1273 	sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",  in snd_atiixp_probe()
1274 		card->shortname, pci->revision, chip->addr, chip->irq);  in snd_atiixp_probe()