1 // SPDX-License-Identifier: GPL-2.0-only
3  * tegra20_spdif.c - Tegra20 SPDIF driver
6  * Copyright (C) 2011-2012 - NVIDIA, Inc.
25 #define DRV_NAME "tegra20-spdif"
29 	struct tegra20_spdif *spdif = dev_get_drvdata(dev);  in tegra20_spdif_runtime_suspend()  local
31 	clk_disable_unprepare(spdif->clk_spdif_out);  in tegra20_spdif_runtime_suspend()
38 	struct tegra20_spdif *spdif = dev_get_drvdata(dev);  in tegra20_spdif_runtime_resume()  local
41 	ret = clk_prepare_enable(spdif->clk_spdif_out);  in tegra20_spdif_runtime_resume()
54 	struct device *dev = dai->dev;  in tegra20_spdif_hw_params()
55 	struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai);  in tegra20_spdif_hw_params()  local
67 		return -EINVAL;  in tegra20_spdif_hw_params()
70 	regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL, mask, val);  in tegra20_spdif_hw_params()
95 		return -EINVAL;  in tegra20_spdif_hw_params()
98 	ret = clk_set_rate(spdif->clk_spdif_out, spdifclock);  in tegra20_spdif_hw_params()
100 		dev_err(dev, "Can't set SPDIF clock rate: %d\n", ret);  in tegra20_spdif_hw_params()
107 static void tegra20_spdif_start_playback(struct tegra20_spdif *spdif)  in tegra20_spdif_start_playback()  argument
109 	regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL,  in tegra20_spdif_start_playback()
114 static void tegra20_spdif_stop_playback(struct tegra20_spdif *spdif)  in tegra20_spdif_stop_playback()  argument
116 	regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_CTRL,  in tegra20_spdif_stop_playback()
123 	struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai);  in tegra20_spdif_trigger()  local
129 		tegra20_spdif_start_playback(spdif);  in tegra20_spdif_trigger()
134 		tegra20_spdif_stop_playback(spdif);  in tegra20_spdif_trigger()
137 		return -EINVAL;  in tegra20_spdif_trigger()
145 	struct tegra20_spdif *spdif = snd_soc_dai_get_drvdata(dai);  in tegra20_spdif_probe()  local
147 	dai->capture_dma_data = NULL;  in tegra20_spdif_probe()
148 	dai->playback_dma_data = &spdif->playback_dma_data;  in tegra20_spdif_probe()
253 	struct tegra20_spdif *spdif;  in tegra20_spdif_platform_probe()  local
258 	spdif = devm_kzalloc(&pdev->dev, sizeof(struct tegra20_spdif),  in tegra20_spdif_platform_probe()
260 	if (!spdif)  in tegra20_spdif_platform_probe()
261 		return -ENOMEM;  in tegra20_spdif_platform_probe()
263 	dev_set_drvdata(&pdev->dev, spdif);  in tegra20_spdif_platform_probe()
265 	spdif->clk_spdif_out = devm_clk_get(&pdev->dev, "spdif_out");  in tegra20_spdif_platform_probe()
266 	if (IS_ERR(spdif->clk_spdif_out)) {  in tegra20_spdif_platform_probe()
267 		pr_err("Can't retrieve spdif clock\n");  in tegra20_spdif_platform_probe()
268 		ret = PTR_ERR(spdif->clk_spdif_out);  in tegra20_spdif_platform_probe()
273 	regs = devm_ioremap_resource(&pdev->dev, mem);  in tegra20_spdif_platform_probe()
279 		dev_err(&pdev->dev, "No DMA resource\n");  in tegra20_spdif_platform_probe()
280 		return -ENODEV;  in tegra20_spdif_platform_probe()
283 	spdif->regmap = devm_regmap_init_mmio(&pdev->dev, regs,  in tegra20_spdif_platform_probe()
285 	if (IS_ERR(spdif->regmap)) {  in tegra20_spdif_platform_probe()
286 		dev_err(&pdev->dev, "regmap init failed\n");  in tegra20_spdif_platform_probe()
287 		ret = PTR_ERR(spdif->regmap);  in tegra20_spdif_platform_probe()
291 	spdif->playback_dma_data.addr = mem->start + TEGRA20_SPDIF_DATA_OUT;  in tegra20_spdif_platform_probe()
292 	spdif->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in tegra20_spdif_platform_probe()
293 	spdif->playback_dma_data.maxburst = 4;  in tegra20_spdif_platform_probe()
294 	spdif->playback_dma_data.slave_id = dmareq->start;  in tegra20_spdif_platform_probe()
296 	pm_runtime_enable(&pdev->dev);  in tegra20_spdif_platform_probe()
297 	if (!pm_runtime_enabled(&pdev->dev)) {  in tegra20_spdif_platform_probe()
298 		ret = tegra20_spdif_runtime_resume(&pdev->dev);  in tegra20_spdif_platform_probe()
303 	ret = snd_soc_register_component(&pdev->dev, &tegra20_spdif_component,  in tegra20_spdif_platform_probe()
306 		dev_err(&pdev->dev, "Could not register DAI: %d\n", ret);  in tegra20_spdif_platform_probe()
307 		ret = -ENOMEM;  in tegra20_spdif_platform_probe()
311 	ret = tegra_pcm_platform_register(&pdev->dev);  in tegra20_spdif_platform_probe()
313 		dev_err(&pdev->dev, "Could not register PCM: %d\n", ret);  in tegra20_spdif_platform_probe()
320 	snd_soc_unregister_component(&pdev->dev);  in tegra20_spdif_platform_probe()
322 	if (!pm_runtime_status_suspended(&pdev->dev))  in tegra20_spdif_platform_probe()
323 		tegra20_spdif_runtime_suspend(&pdev->dev);  in tegra20_spdif_platform_probe()
325 	pm_runtime_disable(&pdev->dev);  in tegra20_spdif_platform_probe()
332 	pm_runtime_disable(&pdev->dev);  in tegra20_spdif_platform_remove()
333 	if (!pm_runtime_status_suspended(&pdev->dev))  in tegra20_spdif_platform_remove()
334 		tegra20_spdif_runtime_suspend(&pdev->dev);  in tegra20_spdif_platform_remove()
336 	tegra_pcm_platform_unregister(&pdev->dev);  in tegra20_spdif_platform_remove()
337 	snd_soc_unregister_component(&pdev->dev);  in tegra20_spdif_platform_remove()
359 MODULE_DESCRIPTION("Tegra20 SPDIF ASoC driver");