207  * struct stm32_spdifrx_data - private data of SPDIFRX
210  * @regmap: SPDIFRX register map pointer
211  * @regmap_conf: SPDIFRX register map configuration pointer
213  * @kclk: kernel clock feeding the SPDIFRX clock generator
220  * @phys_addr: SPDIFRX registers physical base address
225  * @irq: SPDIFRX interrupt line
252 	struct stm32_spdifrx_data *spdifrx = (struct stm32_spdifrx_data *)data;  in stm32_spdifrx_dma_complete()  local
253 	struct platform_device *pdev = spdifrx->pdev;  in stm32_spdifrx_dma_complete()
254 	u32 *p_start = (u32 *)spdifrx->dmab->area;  in stm32_spdifrx_dma_complete()
257 	u16 *ub_ptr = (short *)spdifrx->ub;  in stm32_spdifrx_dma_complete()
260 	regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,  in stm32_spdifrx_dma_complete()
264 	if (!spdifrx->dmab->area)  in stm32_spdifrx_dma_complete()
279 		spdifrx->cs[i] = (unsigned char)SPDIFRX_CSR_CSGET(*ptr);  in stm32_spdifrx_dma_complete()
288 	complete(&spdifrx->cs_completion);  in stm32_spdifrx_dma_complete()
291 static int stm32_spdifrx_dma_ctrl_start(struct stm32_spdifrx_data *spdifrx)  in stm32_spdifrx_dma_ctrl_start()  argument
296 	spdifrx->desc = dmaengine_prep_slave_single(spdifrx->ctrl_chan,  in stm32_spdifrx_dma_ctrl_start()
297 						    spdifrx->dmab->addr,  in stm32_spdifrx_dma_ctrl_start()
301 	if (!spdifrx->desc)  in stm32_spdifrx_dma_ctrl_start()
304 	spdifrx->desc->callback = stm32_spdifrx_dma_complete;  in stm32_spdifrx_dma_ctrl_start()
305 	spdifrx->desc->callback_param = spdifrx;  in stm32_spdifrx_dma_ctrl_start()
306 	cookie = dmaengine_submit(spdifrx->desc);  in stm32_spdifrx_dma_ctrl_start()
311 	dma_async_issue_pending(spdifrx->ctrl_chan);  in stm32_spdifrx_dma_ctrl_start()
316 static void stm32_spdifrx_dma_ctrl_stop(struct stm32_spdifrx_data *spdifrx)  in stm32_spdifrx_dma_ctrl_stop()  argument
318 	dmaengine_terminate_async(spdifrx->ctrl_chan);  in stm32_spdifrx_dma_ctrl_stop()
321 static int stm32_spdifrx_start_sync(struct stm32_spdifrx_data *spdifrx)  in stm32_spdifrx_start_sync()  argument
328 	ret = regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_IMR, imr, imr);  in stm32_spdifrx_start_sync()
332 	spin_lock_irqsave(&spdifrx->lock, flags);  in stm32_spdifrx_start_sync()
334 	spdifrx->refcount++;  in stm32_spdifrx_start_sync()
336 	regmap_read(spdifrx->regmap, STM32_SPDIFRX_CR, &cr);  in stm32_spdifrx_start_sync()
340 		 * Start sync if SPDIFRX is still in idle state.  in stm32_spdifrx_start_sync()
341 		 * SPDIFRX reception enabled when sync done  in stm32_spdifrx_start_sync()
343 		dev_dbg(&spdifrx->pdev->dev, "start synchronization\n");  in stm32_spdifrx_start_sync()
346 		 * SPDIFRX configuration:  in stm32_spdifrx_start_sync()
360 		ret = regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,  in stm32_spdifrx_start_sync()
363 			dev_err(&spdifrx->pdev->dev,  in stm32_spdifrx_start_sync()
367 	spin_unlock_irqrestore(&spdifrx->lock, flags);  in stm32_spdifrx_start_sync()
372 static void stm32_spdifrx_stop(struct stm32_spdifrx_data *spdifrx)  in stm32_spdifrx_stop()  argument
377 	spin_lock_irqsave(&spdifrx->lock, flags);  in stm32_spdifrx_stop()
379 	if (--spdifrx->refcount) {  in stm32_spdifrx_stop()
380 		spin_unlock_irqrestore(&spdifrx->lock, flags);  in stm32_spdifrx_stop()
387 	regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR, cr_mask, cr);  in stm32_spdifrx_stop()
389 	regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_IMR,  in stm32_spdifrx_stop()
392 	regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_IFCR,  in stm32_spdifrx_stop()
396 	regmap_read(spdifrx->regmap, STM32_SPDIFRX_DR, &reg);  in stm32_spdifrx_stop()
397 	regmap_read(spdifrx->regmap, STM32_SPDIFRX_CSR, &reg);  in stm32_spdifrx_stop()
399 	spin_unlock_irqrestore(&spdifrx->lock, flags);  in stm32_spdifrx_stop()
403 					   struct stm32_spdifrx_data *spdifrx)  in stm32_spdifrx_dma_ctrl_register()  argument
407 	spdifrx->ctrl_chan = dma_request_chan(dev, "rx-ctrl");  in stm32_spdifrx_dma_ctrl_register()
408 	if (IS_ERR(spdifrx->ctrl_chan)) {  in stm32_spdifrx_dma_ctrl_register()
409 		if (PTR_ERR(spdifrx->ctrl_chan) != -EPROBE_DEFER)  in stm32_spdifrx_dma_ctrl_register()
411 				PTR_ERR(spdifrx->ctrl_chan));  in stm32_spdifrx_dma_ctrl_register()
412 		return PTR_ERR(spdifrx->ctrl_chan);  in stm32_spdifrx_dma_ctrl_register()
415 	spdifrx->dmab = devm_kzalloc(dev, sizeof(struct snd_dma_buffer),  in stm32_spdifrx_dma_ctrl_register()
417 	if (!spdifrx->dmab)  in stm32_spdifrx_dma_ctrl_register()
420 	spdifrx->dmab->dev.type = SNDRV_DMA_TYPE_DEV_IRAM;  in stm32_spdifrx_dma_ctrl_register()
421 	spdifrx->dmab->dev.dev = dev;  in stm32_spdifrx_dma_ctrl_register()
422 	ret = snd_dma_alloc_pages(spdifrx->dmab->dev.type, dev,  in stm32_spdifrx_dma_ctrl_register()
423 				  SPDIFRX_CSR_BUF_LENGTH, spdifrx->dmab);  in stm32_spdifrx_dma_ctrl_register()
429 	spdifrx->slave_config.direction = DMA_DEV_TO_MEM;  in stm32_spdifrx_dma_ctrl_register()
430 	spdifrx->slave_config.src_addr = (dma_addr_t)(spdifrx->phys_addr +  in stm32_spdifrx_dma_ctrl_register()
432 	spdifrx->slave_config.dst_addr = spdifrx->dmab->addr;  in stm32_spdifrx_dma_ctrl_register()
433 	spdifrx->slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in stm32_spdifrx_dma_ctrl_register()
434 	spdifrx->slave_config.src_maxburst = 1;  in stm32_spdifrx_dma_ctrl_register()
436 	ret = dmaengine_slave_config(spdifrx->ctrl_chan,  in stm32_spdifrx_dma_ctrl_register()
437 				     &spdifrx->slave_config);  in stm32_spdifrx_dma_ctrl_register()
440 		spdifrx->ctrl_chan = NULL;  in stm32_spdifrx_dma_ctrl_register()
481 static int stm32_spdifrx_get_ctrl_data(struct stm32_spdifrx_data *spdifrx)  in stm32_spdifrx_get_ctrl_data()  argument
485 	memset(spdifrx->cs, 0, SPDIFRX_CS_BYTES_NB);  in stm32_spdifrx_get_ctrl_data()
486 	memset(spdifrx->ub, 0, SPDIFRX_UB_BYTES_NB);  in stm32_spdifrx_get_ctrl_data()
488 	ret = stm32_spdifrx_dma_ctrl_start(spdifrx);  in stm32_spdifrx_get_ctrl_data()
492 	ret = clk_prepare_enable(spdifrx->kclk);  in stm32_spdifrx_get_ctrl_data()
494 		dev_err(&spdifrx->pdev->dev, "Enable kclk failed: %d\n", ret);  in stm32_spdifrx_get_ctrl_data()
498 	ret = regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,  in stm32_spdifrx_get_ctrl_data()
503 	ret = stm32_spdifrx_start_sync(spdifrx);  in stm32_spdifrx_get_ctrl_data()
507 	if (wait_for_completion_interruptible_timeout(&spdifrx->cs_completion,  in stm32_spdifrx_get_ctrl_data()
510 		dev_dbg(&spdifrx->pdev->dev, "Failed to get control data\n");  in stm32_spdifrx_get_ctrl_data()
514 	stm32_spdifrx_stop(spdifrx);  in stm32_spdifrx_get_ctrl_data()
515 	stm32_spdifrx_dma_ctrl_stop(spdifrx);  in stm32_spdifrx_get_ctrl_data()
518 	clk_disable_unprepare(spdifrx->kclk);  in stm32_spdifrx_get_ctrl_data()
527 	struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);  in stm32_spdifrx_capture_get()  local
529 	stm32_spdifrx_get_ctrl_data(spdifrx);  in stm32_spdifrx_capture_get()
531 	ucontrol->value.iec958.status[0] = spdifrx->cs[0];  in stm32_spdifrx_capture_get()
532 	ucontrol->value.iec958.status[1] = spdifrx->cs[1];  in stm32_spdifrx_capture_get()
533 	ucontrol->value.iec958.status[2] = spdifrx->cs[2];  in stm32_spdifrx_capture_get()
534 	ucontrol->value.iec958.status[3] = spdifrx->cs[3];  in stm32_spdifrx_capture_get()
535 	ucontrol->value.iec958.status[4] = spdifrx->cs[4];  in stm32_spdifrx_capture_get()
544 	struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);  in stm32_spdif_user_bits_get()  local
546 	stm32_spdifrx_get_ctrl_data(spdifrx);  in stm32_spdif_user_bits_get()
548 	ucontrol->value.iec958.status[0] = spdifrx->ub[0];  in stm32_spdif_user_bits_get()
549 	ucontrol->value.iec958.status[1] = spdifrx->ub[1];  in stm32_spdif_user_bits_get()
550 	ucontrol->value.iec958.status[2] = spdifrx->ub[2];  in stm32_spdif_user_bits_get()
551 	ucontrol->value.iec958.status[3] = spdifrx->ub[3];  in stm32_spdif_user_bits_get()
552 	ucontrol->value.iec958.status[4] = spdifrx->ub[4];  in stm32_spdif_user_bits_get()
579 	SOC_ENUM("SPDIFRX input", ctrl_enum_input),
580 	SOC_ENUM("SPDIFRX CS channel", ctrl_enum_cs_channel),
599 	struct stm32_spdifrx_data *spdifrx = dev_get_drvdata(cpu_dai->dev);  in stm32_spdifrx_dai_probe()  local
601 	spdifrx->dma_params.addr = (dma_addr_t)(spdifrx->phys_addr +  in stm32_spdifrx_dai_probe()
603 	spdifrx->dma_params.maxburst = 1;  in stm32_spdifrx_dai_probe()
605 	snd_soc_dai_init_dma_data(cpu_dai, NULL, &spdifrx->dma_params);  in stm32_spdifrx_dai_probe()
669 	struct stm32_spdifrx_data *spdifrx = (struct stm32_spdifrx_data *)devid;  in stm32_spdifrx_isr()  local
670 	struct platform_device *pdev = spdifrx->pdev;  in stm32_spdifrx_isr()
675 	regmap_read(spdifrx->regmap, STM32_SPDIFRX_SR, &sr);  in stm32_spdifrx_isr()
676 	regmap_read(spdifrx->regmap, STM32_SPDIFRX_IMR, &imr);  in stm32_spdifrx_isr()
691 	regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_IFCR,  in stm32_spdifrx_isr()
710 		/* Enable spdifrx */  in stm32_spdifrx_isr()
712 		regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,  in stm32_spdifrx_isr()
732 		regmap_read(spdifrx->regmap, STM32_SPDIFRX_CR, &cr);  in stm32_spdifrx_isr()
736 		/* SPDIFRX is in STATE_STOP. Disable SPDIFRX to clear errors */  in stm32_spdifrx_isr()
738 		regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,  in stm32_spdifrx_isr()
741 		/* If SPDIFRX was in STATE_SYNC, retry synchro */  in stm32_spdifrx_isr()
744 			regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,  in stm32_spdifrx_isr()
749 		spin_lock(&spdifrx->irq_lock);  in stm32_spdifrx_isr()
750 		if (spdifrx->substream)  in stm32_spdifrx_isr()
751 			snd_pcm_stop(spdifrx->substream,  in stm32_spdifrx_isr()
753 		spin_unlock(&spdifrx->irq_lock);  in stm32_spdifrx_isr()
758 	spin_lock(&spdifrx->irq_lock);  in stm32_spdifrx_isr()
759 	if (err_xrun && spdifrx->substream)  in stm32_spdifrx_isr()
760 		snd_pcm_stop_xrun(spdifrx->substream);  in stm32_spdifrx_isr()
761 	spin_unlock(&spdifrx->irq_lock);  in stm32_spdifrx_isr()
769 	struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);  in stm32_spdifrx_startup()  local
773 	spin_lock_irqsave(&spdifrx->irq_lock, flags);  in stm32_spdifrx_startup()
774 	spdifrx->substream = substream;  in stm32_spdifrx_startup()
775 	spin_unlock_irqrestore(&spdifrx->irq_lock, flags);  in stm32_spdifrx_startup()
777 	ret = clk_prepare_enable(spdifrx->kclk);  in stm32_spdifrx_startup()
779 		dev_err(&spdifrx->pdev->dev, "Enable kclk failed: %d\n", ret);  in stm32_spdifrx_startup()
788 	struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);  in stm32_spdifrx_hw_params()  local
800 		dev_err(&spdifrx->pdev->dev, "Unexpected data format\n");  in stm32_spdifrx_hw_params()
809 	spdifrx->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in stm32_spdifrx_hw_params()
810 	snd_soc_dai_init_dma_data(cpu_dai, NULL, &spdifrx->dma_params);  in stm32_spdifrx_hw_params()
812 	return regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,  in stm32_spdifrx_hw_params()
820 	struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);  in stm32_spdifrx_trigger()  local
827 		regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_IMR,  in stm32_spdifrx_trigger()
830 		regmap_update_bits(spdifrx->regmap, STM32_SPDIFRX_CR,  in stm32_spdifrx_trigger()
833 		ret = stm32_spdifrx_start_sync(spdifrx);  in stm32_spdifrx_trigger()
838 		stm32_spdifrx_stop(spdifrx);  in stm32_spdifrx_trigger()
850 	struct stm32_spdifrx_data *spdifrx = snd_soc_dai_get_drvdata(cpu_dai);  in stm32_spdifrx_shutdown()  local
853 	spin_lock_irqsave(&spdifrx->irq_lock, flags);  in stm32_spdifrx_shutdown()
854 	spdifrx->substream = NULL;  in stm32_spdifrx_shutdown()
855 	spin_unlock_irqrestore(&spdifrx->irq_lock, flags);  in stm32_spdifrx_shutdown()
857 	clk_disable_unprepare(spdifrx->kclk);  in stm32_spdifrx_shutdown()
892 	.name = "stm32-spdifrx",
902 		.compatible = "st,stm32h7-spdifrx",
909 				  struct stm32_spdifrx_data *spdifrx)  in stm32_spdifrx_parse_of()  argument
920 		spdifrx->regmap_conf =  in stm32_spdifrx_parse_of()
926 	spdifrx->base = devm_ioremap_resource(&pdev->dev, res);  in stm32_spdifrx_parse_of()
927 	if (IS_ERR(spdifrx->base))  in stm32_spdifrx_parse_of()
928 		return PTR_ERR(spdifrx->base);  in stm32_spdifrx_parse_of()
930 	spdifrx->phys_addr = res->start;  in stm32_spdifrx_parse_of()
932 	spdifrx->kclk = devm_clk_get(&pdev->dev, "kclk");  in stm32_spdifrx_parse_of()
933 	if (IS_ERR(spdifrx->kclk)) {  in stm32_spdifrx_parse_of()
934 		if (PTR_ERR(spdifrx->kclk) != -EPROBE_DEFER)  in stm32_spdifrx_parse_of()
936 				PTR_ERR(spdifrx->kclk));  in stm32_spdifrx_parse_of()
937 		return PTR_ERR(spdifrx->kclk);  in stm32_spdifrx_parse_of()
940 	spdifrx->irq = platform_get_irq(pdev, 0);  in stm32_spdifrx_parse_of()
941 	if (spdifrx->irq < 0)  in stm32_spdifrx_parse_of()
942 		return spdifrx->irq;  in stm32_spdifrx_parse_of()
949 	struct stm32_spdifrx_data *spdifrx = platform_get_drvdata(pdev);  in stm32_spdifrx_remove()  local
951 	if (spdifrx->ctrl_chan)  in stm32_spdifrx_remove()
952 		dma_release_channel(spdifrx->ctrl_chan);  in stm32_spdifrx_remove()
954 	if (spdifrx->dmab)  in stm32_spdifrx_remove()
955 		snd_dma_free_pages(spdifrx->dmab);  in stm32_spdifrx_remove()
965 	struct stm32_spdifrx_data *spdifrx;  in stm32_spdifrx_probe()  local
971 	spdifrx = devm_kzalloc(&pdev->dev, sizeof(*spdifrx), GFP_KERNEL);  in stm32_spdifrx_probe()
972 	if (!spdifrx)  in stm32_spdifrx_probe()
975 	spdifrx->pdev = pdev;  in stm32_spdifrx_probe()
976 	init_completion(&spdifrx->cs_completion);  in stm32_spdifrx_probe()
977 	spin_lock_init(&spdifrx->lock);  in stm32_spdifrx_probe()
978 	spin_lock_init(&spdifrx->irq_lock);  in stm32_spdifrx_probe()
980 	platform_set_drvdata(pdev, spdifrx);  in stm32_spdifrx_probe()
982 	ret = stm32_spdifrx_parse_of(pdev, spdifrx);  in stm32_spdifrx_probe()
986 	spdifrx->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "kclk",  in stm32_spdifrx_probe()
987 						    spdifrx->base,  in stm32_spdifrx_probe()
988 						    spdifrx->regmap_conf);  in stm32_spdifrx_probe()
989 	if (IS_ERR(spdifrx->regmap)) {  in stm32_spdifrx_probe()
990 		if (PTR_ERR(spdifrx->regmap) != -EPROBE_DEFER)  in stm32_spdifrx_probe()
992 				PTR_ERR(spdifrx->regmap));  in stm32_spdifrx_probe()
993 		return PTR_ERR(spdifrx->regmap);  in stm32_spdifrx_probe()
996 	ret = devm_request_irq(&pdev->dev, spdifrx->irq, stm32_spdifrx_isr, 0,  in stm32_spdifrx_probe()
997 			       dev_name(&pdev->dev), spdifrx);  in stm32_spdifrx_probe()
1031 	ret = stm32_spdifrx_dma_ctrl_register(&pdev->dev, spdifrx);  in stm32_spdifrx_probe()
1035 	ret = regmap_read(spdifrx->regmap, STM32_SPDIFRX_IDR, &idr);  in stm32_spdifrx_probe()
1040 		ret = regmap_read(spdifrx->regmap, STM32_SPDIFRX_VERR, &ver);  in stm32_spdifrx_probe()
1044 		dev_dbg(&pdev->dev, "SPDIFRX version: %lu.%lu registered\n",  in stm32_spdifrx_probe()
1062 	struct stm32_spdifrx_data *spdifrx = dev_get_drvdata(dev);  in stm32_spdifrx_suspend()  local
1064 	regcache_cache_only(spdifrx->regmap, true);  in stm32_spdifrx_suspend()
1065 	regcache_mark_dirty(spdifrx->regmap);  in stm32_spdifrx_suspend()
1072 	struct stm32_spdifrx_data *spdifrx = dev_get_drvdata(dev);  in stm32_spdifrx_resume()  local
1074 	regcache_cache_only(spdifrx->regmap, false);  in stm32_spdifrx_resume()
1076 	return regcache_sync(spdifrx->regmap);  in stm32_spdifrx_resume()
1086 		.name = "st,stm32-spdifrx",
1096 MODULE_DESCRIPTION("STM32 Soc spdifrx Interface");
1098 MODULE_ALIAS("platform:stm32-spdifrx");