1 // SPDX-License-Identifier: GPL-2.0-or-later
11 #include <linux/clk.h>
168  * struct sun4i_spdif_quirks - Differences between SoC variants.
182 	struct clk *spdif_clk;
183 	struct clk *apb_clk;
193 	const struct sun4i_spdif_quirks *quirks = host->quirks;  in sun4i_spdif_configure()
196 	regmap_write(host->regmap, SUN4I_SPDIF_CTL, SUN4I_SPDIF_CTL_RESET);  in sun4i_spdif_configure()
199 	regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL,  in sun4i_spdif_configure()
200 			   quirks->val_fctl_ftx, quirks->val_fctl_ftx);  in sun4i_spdif_configure()
203 	regmap_write(host->regmap, SUN4I_SPDIF_TXCNT, 0);  in sun4i_spdif_configure()
209 	if (substream->runtime->channels == 1)  in sun4i_snd_txctrl_on()
210 		regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,  in sun4i_snd_txctrl_on()
215 	regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,  in sun4i_snd_txctrl_on()
219 	regmap_update_bits(host->regmap, SUN4I_SPDIF_INT,  in sun4i_snd_txctrl_on()
223 	regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL,  in sun4i_snd_txctrl_on()
231 	regmap_update_bits(host->regmap, SUN4I_SPDIF_TXCFG,  in sun4i_snd_txctrl_off()
235 	regmap_update_bits(host->regmap, SUN4I_SPDIF_INT,  in sun4i_snd_txctrl_off()
239 	regmap_update_bits(host->regmap, SUN4I_SPDIF_CTL,  in sun4i_snd_txctrl_off()
249 	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)  in sun4i_spdif_startup()
250 		return -EINVAL;  in sun4i_spdif_startup()
268 	struct platform_device *pdev = host->pdev;  in sun4i_spdif_hw_params()
280 		return -EINVAL;  in sun4i_spdif_hw_params()
294 		return -EINVAL;  in sun4i_spdif_hw_params()
312 		return -EINVAL;  in sun4i_spdif_hw_params()
315 	ret = clk_set_rate(host->spdif_clk, mclk);  in sun4i_spdif_hw_params()
317 		dev_err(&pdev->dev,  in sun4i_spdif_hw_params()
322 	regmap_update_bits(host->regmap, SUN4I_SPDIF_FCTL,  in sun4i_spdif_hw_params()
346 		return -EINVAL;  in sun4i_spdif_hw_params()
353 	reg_val |= SUN4I_SPDIF_TXCFG_TXRATIO(mclk_div - 1);  in sun4i_spdif_hw_params()
354 	regmap_write(host->regmap, SUN4I_SPDIF_TXCFG, reg_val);  in sun4i_spdif_hw_params()
365 	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)  in sun4i_spdif_trigger()
366 		return -EINVAL;  in sun4i_spdif_trigger()
382 		ret = -EINVAL;  in sun4i_spdif_trigger()
392 	snd_soc_dai_init_dma_data(dai, &host->dma_params_tx, NULL);  in sun4i_spdif_soc_dai_probe()
452 		.compatible = "allwinner,sun4i-a10-spdif",
456 		.compatible = "allwinner,sun6i-a31-spdif",
460 		.compatible = "allwinner,sun8i-h3-spdif",
464 		.compatible = "allwinner,sun50i-h6-spdif",
472 	.name		= "sun4i-spdif",
479 	clk_disable_unprepare(host->spdif_clk);  in sun4i_spdif_runtime_suspend()
480 	clk_disable_unprepare(host->apb_clk);  in sun4i_spdif_runtime_suspend()
490 	ret = clk_prepare_enable(host->spdif_clk);  in sun4i_spdif_runtime_resume()
493 	ret = clk_prepare_enable(host->apb_clk);  in sun4i_spdif_runtime_resume()
495 		clk_disable_unprepare(host->spdif_clk);  in sun4i_spdif_runtime_resume()
508 	dev_dbg(&pdev->dev, "Entered %s\n", __func__);  in sun4i_spdif_probe()
510 	host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);  in sun4i_spdif_probe()
512 		return -ENOMEM;  in sun4i_spdif_probe()
514 	host->pdev = pdev;  in sun4i_spdif_probe()
516 	/* Initialize this copy of the CPU DAI driver structure */  in sun4i_spdif_probe()
517 	memcpy(&host->cpu_dai_drv, &sun4i_spdif_dai, sizeof(sun4i_spdif_dai));  in sun4i_spdif_probe()
518 	host->cpu_dai_drv.name = dev_name(&pdev->dev);  in sun4i_spdif_probe()
522 	base = devm_ioremap_resource(&pdev->dev, res);  in sun4i_spdif_probe()
526 	quirks = of_device_get_match_data(&pdev->dev);  in sun4i_spdif_probe()
528 		dev_err(&pdev->dev, "Failed to determine the quirks to use\n");  in sun4i_spdif_probe()
529 		return -ENODEV;  in sun4i_spdif_probe()
531 	host->quirks = quirks;  in sun4i_spdif_probe()
533 	host->regmap = devm_regmap_init_mmio(&pdev->dev, base,  in sun4i_spdif_probe()
537 	host->apb_clk = devm_clk_get(&pdev->dev, "apb");  in sun4i_spdif_probe()
538 	if (IS_ERR(host->apb_clk)) {  in sun4i_spdif_probe()
539 		dev_err(&pdev->dev, "failed to get a apb clock.\n");  in sun4i_spdif_probe()
540 		return PTR_ERR(host->apb_clk);  in sun4i_spdif_probe()
543 	host->spdif_clk = devm_clk_get(&pdev->dev, "spdif");  in sun4i_spdif_probe()
544 	if (IS_ERR(host->spdif_clk)) {  in sun4i_spdif_probe()
545 		dev_err(&pdev->dev, "failed to get a spdif clock.\n");  in sun4i_spdif_probe()
546 		return PTR_ERR(host->spdif_clk);  in sun4i_spdif_probe()
549 	host->dma_params_tx.addr = res->start + quirks->reg_dac_txdata;  in sun4i_spdif_probe()
550 	host->dma_params_tx.maxburst = 8;  in sun4i_spdif_probe()
551 	host->dma_params_tx.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;  in sun4i_spdif_probe()
555 	if (quirks->has_reset) {  in sun4i_spdif_probe()
556 		host->rst = devm_reset_control_get_optional_exclusive(&pdev->dev,  in sun4i_spdif_probe()
558 		if (PTR_ERR(host->rst) == -EPROBE_DEFER) {  in sun4i_spdif_probe()
559 			ret = -EPROBE_DEFER;  in sun4i_spdif_probe()
560 			dev_err(&pdev->dev, "Failed to get reset: %d\n", ret);  in sun4i_spdif_probe()
563 		if (!IS_ERR(host->rst))  in sun4i_spdif_probe()
564 			reset_control_deassert(host->rst);  in sun4i_spdif_probe()
567 	ret = devm_snd_soc_register_component(&pdev->dev,  in sun4i_spdif_probe()
572 	pm_runtime_enable(&pdev->dev);  in sun4i_spdif_probe()
573 	if (!pm_runtime_enabled(&pdev->dev)) {  in sun4i_spdif_probe()
574 		ret = sun4i_spdif_runtime_resume(&pdev->dev);  in sun4i_spdif_probe()
579 	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);  in sun4i_spdif_probe()
584 	if (!pm_runtime_status_suspended(&pdev->dev))  in sun4i_spdif_probe()
585 		sun4i_spdif_runtime_suspend(&pdev->dev);  in sun4i_spdif_probe()
587 	pm_runtime_disable(&pdev->dev);  in sun4i_spdif_probe()
593 	pm_runtime_disable(&pdev->dev);  in sun4i_spdif_remove()
594 	if (!pm_runtime_status_suspended(&pdev->dev))  in sun4i_spdif_remove()
595 		sun4i_spdif_runtime_suspend(&pdev->dev);  in sun4i_spdif_remove()
607 		.name	= "sun4i-spdif",
619 MODULE_DESCRIPTION("Allwinner sun4i SPDIF SoC Interface");
621 MODULE_ALIAS("platform:sun4i-spdif");