1 // SPDX-License-Identifier: GPL-2.0-or-later
3 // This driver supports the DMIC in Allwinner's H6 SoCs.
77 	struct snd_soc_pcm_runtime *rtd = substream->private_data;  in sun50i_dmic_startup()
81 	if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)  in sun50i_dmic_startup()
82 		return -EINVAL;  in sun50i_dmic_startup()
84 	regmap_update_bits(host->regmap, SUN50I_DMIC_RXFIFO_CTL,  in sun50i_dmic_startup()
87 	regmap_write(host->regmap, SUN50I_DMIC_CNT, SUN50I_DMIC_CNT_N);  in sun50i_dmic_startup()
100 	unsigned int chan_en = (1 << channels) - 1;  in sun50i_dmic_hw_params()
103 	/* DMIC num is N+1 */  in sun50i_dmic_hw_params()
104 	regmap_update_bits(host->regmap, SUN50I_DMIC_CH_NUM,  in sun50i_dmic_hw_params()
106 			   SUN50I_DMIC_CH_NUM_N(channels - 1));  in sun50i_dmic_hw_params()
107 	regmap_write(host->regmap, SUN50I_DMIC_HPF_CTRL, chan_en);  in sun50i_dmic_hw_params()
108 	regmap_update_bits(host->regmap, SUN50I_DMIC_EN_CTL,  in sun50i_dmic_hw_params()
114 		regmap_update_bits(host->regmap, SUN50I_DMIC_RXFIFO_CTL,  in sun50i_dmic_hw_params()
119 		regmap_update_bits(host->regmap, SUN50I_DMIC_RXFIFO_CTL,  in sun50i_dmic_hw_params()
124 		dev_err(cpu_dai->dev, "Invalid format!\n");  in sun50i_dmic_hw_params()
125 		return -EINVAL;  in sun50i_dmic_hw_params()
127 	/* The hardware supports FIFO mode 1 for 24-bit samples */  in sun50i_dmic_hw_params()
128 	regmap_update_bits(host->regmap, SUN50I_DMIC_RXFIFO_CTL,  in sun50i_dmic_hw_params()
147 		dev_err(cpu_dai->dev, "Invalid rate!\n");  in sun50i_dmic_hw_params()
148 		return -EINVAL;  in sun50i_dmic_hw_params()
151 	if (clk_set_rate(host->dmic_clk, mclk)) {  in sun50i_dmic_hw_params()
152 		dev_err(cpu_dai->dev, "mclk : %u not support\n", mclk);  in sun50i_dmic_hw_params()
153 		return -EINVAL;  in sun50i_dmic_hw_params()
158 			regmap_update_bits(host->regmap, SUN50I_DMIC_SR,  in sun50i_dmic_hw_params()
167 		host->dma_params_rx.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;  in sun50i_dmic_hw_params()
170 		host->dma_params_rx.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in sun50i_dmic_hw_params()
173 		dev_err(cpu_dai->dev, "Unsupported physical sample width: %d\n",  in sun50i_dmic_hw_params()
175 		return -EINVAL;  in sun50i_dmic_hw_params()
180 		regmap_update_bits(host->regmap, SUN50I_DMIC_CTL,  in sun50i_dmic_hw_params()
184 		regmap_update_bits(host->regmap, SUN50I_DMIC_CTL,  in sun50i_dmic_hw_params()
196 	if (substream->stream != SNDRV_PCM_STREAM_CAPTURE)  in sun50i_dmic_trigger()
197 		return -EINVAL;  in sun50i_dmic_trigger()
204 		regmap_update_bits(host->regmap, SUN50I_DMIC_INTC,  in sun50i_dmic_trigger()
208 		regmap_update_bits(host->regmap, SUN50I_DMIC_EN_CTL,  in sun50i_dmic_trigger()
216 		regmap_update_bits(host->regmap, SUN50I_DMIC_INTC,  in sun50i_dmic_trigger()
219 		regmap_update_bits(host->regmap, SUN50I_DMIC_EN_CTL,  in sun50i_dmic_trigger()
223 		ret = -EINVAL;  in sun50i_dmic_trigger()
233 	snd_soc_dai_init_dma_data(dai, NULL, &host->dma_params_rx);  in sun50i_dmic_soc_dai_probe()
265 	.name = "dmic",
270 		.compatible = "allwinner,sun50i-h6-dmic",
277 	.name           = "sun50i-dmic",
284 	clk_disable_unprepare(host->dmic_clk);  in sun50i_dmic_runtime_suspend()
285 	clk_disable_unprepare(host->bus_clk);  in sun50i_dmic_runtime_suspend()
295 	ret = clk_prepare_enable(host->dmic_clk);  in sun50i_dmic_runtime_resume()
299 	ret = clk_prepare_enable(host->bus_clk);  in sun50i_dmic_runtime_resume()
301 		clk_disable_unprepare(host->dmic_clk);  in sun50i_dmic_runtime_resume()
315 	host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);  in sun50i_dmic_probe()
317 		return -ENOMEM;  in sun50i_dmic_probe()
321 	base = devm_ioremap_resource(&pdev->dev, res);  in sun50i_dmic_probe()
323 		return dev_err_probe(&pdev->dev, PTR_ERR(base),  in sun50i_dmic_probe()
326 	host->regmap = devm_regmap_init_mmio(&pdev->dev, base,  in sun50i_dmic_probe()
330 	host->bus_clk = devm_clk_get(&pdev->dev, "bus");  in sun50i_dmic_probe()
331 	if (IS_ERR(host->bus_clk))  in sun50i_dmic_probe()
332 		return dev_err_probe(&pdev->dev, PTR_ERR(host->bus_clk),  in sun50i_dmic_probe()
335 	host->dmic_clk = devm_clk_get(&pdev->dev, "mod");  in sun50i_dmic_probe()
336 	if (IS_ERR(host->dmic_clk))  in sun50i_dmic_probe()
337 		return dev_err_probe(&pdev->dev, PTR_ERR(host->dmic_clk),  in sun50i_dmic_probe()
338 				     "failed to get dmic clock.\n");  in sun50i_dmic_probe()
340 	host->dma_params_rx.addr = res->start + SUN50I_DMIC_DATA;  in sun50i_dmic_probe()
341 	host->dma_params_rx.maxburst = 8;  in sun50i_dmic_probe()
345 	host->rst = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);  in sun50i_dmic_probe()
346 	if (IS_ERR(host->rst))  in sun50i_dmic_probe()
347 		return dev_err_probe(&pdev->dev, PTR_ERR(host->rst),  in sun50i_dmic_probe()
349 	reset_control_deassert(host->rst);  in sun50i_dmic_probe()
351 	ret = devm_snd_soc_register_component(&pdev->dev, &sun50i_dmic_component,  in sun50i_dmic_probe()
354 		return dev_err_probe(&pdev->dev, ret,  in sun50i_dmic_probe()
357 	pm_runtime_enable(&pdev->dev);  in sun50i_dmic_probe()
358 	if (!pm_runtime_enabled(&pdev->dev)) {  in sun50i_dmic_probe()
359 		ret = sun50i_dmic_runtime_resume(&pdev->dev);  in sun50i_dmic_probe()
364 	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);  in sun50i_dmic_probe()
370 	if (!pm_runtime_status_suspended(&pdev->dev))  in sun50i_dmic_probe()
371 		sun50i_dmic_runtime_suspend(&pdev->dev);  in sun50i_dmic_probe()
373 	pm_runtime_disable(&pdev->dev);  in sun50i_dmic_probe()
379 	pm_runtime_disable(&pdev->dev);  in sun50i_dmic_remove()
380 	if (!pm_runtime_status_suspended(&pdev->dev))  in sun50i_dmic_remove()
381 		sun50i_dmic_runtime_suspend(&pdev->dev);  in sun50i_dmic_remove()
393 		.name   = "sun50i-dmic",
403 MODULE_DESCRIPTION("Allwinner sun50i DMIC SoC Interface");
406 MODULE_ALIAS("platform:sun50i-dmic");