1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Atmel ALSA SoC Audio Class D Amplifier (CLASSD) driver
18 #include "atmel-classd.h"
40 		.compatible = "atmel,sama5d2-classd",
49 	struct device_node *np = dev->of_node;  in atmel_classd_dt_init()
56 		return ERR_PTR(-EINVAL);  in atmel_classd_dt_init()
61 		return ERR_PTR(-ENOMEM);  in atmel_classd_dt_init()
63 	ret = of_property_read_string(np, "atmel,pwm-type", &pwm_type_s);  in atmel_classd_dt_init()
65 		pdata->pwm_type = CLASSD_MR_PWMTYP_DIFF;  in atmel_classd_dt_init()
67 		pdata->pwm_type = CLASSD_MR_PWMTYP_SINGLE;  in atmel_classd_dt_init()
70 			"atmel,non-overlap-time", &pdata->non_overlap_time);  in atmel_classd_dt_init()
72 		pdata->non_overlap_enable = false;  in atmel_classd_dt_init()
74 		pdata->non_overlap_enable = true;  in atmel_classd_dt_init()
76 	ret = of_property_read_string(np, "atmel,model", &pdata->card_name);  in atmel_classd_dt_init()
78 		pdata->card_name = "CLASSD";  in atmel_classd_dt_init()
86 	return ERR_PTR(-EINVAL);  in atmel_classd_dt_init()
122 	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);  in atmel_classd_cpu_dai_startup()
125 	regmap_write(dd->regmap, CLASSD_THR, 0x0);  in atmel_classd_cpu_dai_startup()
127 	err = clk_prepare_enable(dd->pclk);  in atmel_classd_cpu_dai_startup()
130 	err = clk_prepare_enable(dd->gclk);  in atmel_classd_cpu_dai_startup()
132 		clk_disable_unprepare(dd->pclk);  in atmel_classd_cpu_dai_startup()
145 	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);  in atmel_classd_platform_configure_dma()
148 		dev_err(dd->dev,  in atmel_classd_platform_configure_dma()
149 			"only supports 16-bit audio data\n");  in atmel_classd_platform_configure_dma()
150 		return -EINVAL;  in atmel_classd_platform_configure_dma()
154 		slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;  in atmel_classd_platform_configure_dma()
156 		slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;  in atmel_classd_platform_configure_dma()
158 	slave_config->direction		= DMA_MEM_TO_DEV;  in atmel_classd_platform_configure_dma()
159 	slave_config->dst_addr		= dd->phy_base + CLASSD_THR;  in atmel_classd_platform_configure_dma()
160 	slave_config->dst_maxburst	= 1;  in atmel_classd_platform_configure_dma()
161 	slave_config->src_maxburst	= 1;  in atmel_classd_platform_configure_dma()
162 	slave_config->device_fc		= false;  in atmel_classd_platform_configure_dma()
184 	"Treble-12dB", "Treble-6dB",
185 	"Medium-8dB", "Medium-3dB",
186 	"Bass-12dB", "Bass-6dB",
207 static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1);
234 	const struct atmel_classd_pdata *pdata = dd->pdata;  in atmel_classd_component_probe()
238 	val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT;  in atmel_classd_component_probe()
241 	if (pdata->non_overlap_enable) {  in atmel_classd_component_probe()
246 		switch (pdata->non_overlap_time) {  in atmel_classd_component_probe()
266 			dev_warn(component->dev,  in atmel_classd_component_probe()
267 				"non-overlapping value %d is invalid, the default value 10 is specified\n",  in atmel_classd_component_probe()
268 				pdata->non_overlap_time);  in atmel_classd_component_probe()
275 	dev_info(component->dev,  in atmel_classd_component_probe()
276 		"PWM modulation type is %s, non-overlapping is %s\n",  in atmel_classd_component_probe()
277 		pwm_type[pdata->pwm_type],  in atmel_classd_component_probe()
278 		pdata->non_overlap_enable?"enabled":"disabled");  in atmel_classd_component_probe()
288 	return regcache_sync(dd->regmap);  in atmel_classd_component_resume()
294 	struct snd_soc_component *component = cpu_dai->component;  in atmel_classd_cpu_dai_mute_stream()
342 	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);  in atmel_classd_cpu_dai_hw_params()
343 	struct snd_soc_component *component = cpu_dai->component;  in atmel_classd_cpu_dai_hw_params()
351 	best_val = abs(fs - sample_rates[0].rate);  in atmel_classd_cpu_dai_hw_params()
354 		cur_val = abs(fs - sample_rates[i].rate);  in atmel_classd_cpu_dai_hw_params()
361 	dev_dbg(component->dev,  in atmel_classd_cpu_dai_hw_params()
365 	clk_disable_unprepare(dd->gclk);  in atmel_classd_cpu_dai_hw_params()
367 	ret = clk_set_rate(dd->gclk, sample_rates[best].gclk_rate);  in atmel_classd_cpu_dai_hw_params()
377 	return clk_prepare_enable(dd->gclk);  in atmel_classd_cpu_dai_hw_params()
385 	struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);  in atmel_classd_cpu_dai_shutdown()
387 	clk_disable_unprepare(dd->gclk);  in atmel_classd_cpu_dai_shutdown()
393 	struct snd_soc_component *component = cpu_dai->component;  in atmel_classd_cpu_dai_prepare()
406 	struct snd_soc_component *component = cpu_dai->component;  in atmel_classd_cpu_dai_trigger()
424 		return -EINVAL;  in atmel_classd_cpu_dai_trigger()
454 	.name			= "atmel-classd",
474 		return -ENOMEM;  in atmel_classd_asoc_card_init()
478 		return -ENOMEM;  in atmel_classd_asoc_card_init()
480 	dai_link->cpus		= &comp[0];  in atmel_classd_asoc_card_init()
481 	dai_link->codecs	= &snd_soc_dummy_dlc;  in atmel_classd_asoc_card_init()
482 	dai_link->platforms	= &comp[1];  in atmel_classd_asoc_card_init()
484 	dai_link->num_cpus	= 1;  in atmel_classd_asoc_card_init()
485 	dai_link->num_codecs	= 1;  in atmel_classd_asoc_card_init()
486 	dai_link->num_platforms = 1;  in atmel_classd_asoc_card_init()
488 	dai_link->name			= "CLASSD";  in atmel_classd_asoc_card_init()
489 	dai_link->stream_name		= "CLASSD PCM";  in atmel_classd_asoc_card_init()
490 	dai_link->cpus->dai_name	= dev_name(dev);  in atmel_classd_asoc_card_init()
491 	dai_link->platforms->name	= dev_name(dev);  in atmel_classd_asoc_card_init()
493 	card->dai_link	= dai_link;  in atmel_classd_asoc_card_init()
494 	card->num_links	= 1;  in atmel_classd_asoc_card_init()
495 	card->name	= dd->pdata->card_name;  in atmel_classd_asoc_card_init()
496 	card->dev	= dev;  in atmel_classd_asoc_card_init()
520 	struct device *dev = &pdev->dev;  in atmel_classd_probe()
537 		return -ENOMEM;  in atmel_classd_probe()
539 	dd->pdata = pdata;  in atmel_classd_probe()
541 	dd->irq = platform_get_irq(pdev, 0);  in atmel_classd_probe()
542 	if (dd->irq < 0)  in atmel_classd_probe()
543 		return dd->irq;  in atmel_classd_probe()
545 	dd->pclk = devm_clk_get(dev, "pclk");  in atmel_classd_probe()
546 	if (IS_ERR(dd->pclk)) {  in atmel_classd_probe()
547 		ret = PTR_ERR(dd->pclk);  in atmel_classd_probe()
552 	dd->gclk = devm_clk_get(dev, "gclk");  in atmel_classd_probe()
553 	if (IS_ERR(dd->gclk)) {  in atmel_classd_probe()
554 		ret = PTR_ERR(dd->gclk);  in atmel_classd_probe()
563 	dd->phy_base = res->start;  in atmel_classd_probe()
564 	dd->dev = dev;  in atmel_classd_probe()
566 	dd->regmap = devm_regmap_init_mmio(dev, io_base,  in atmel_classd_probe()
568 	if (IS_ERR(dd->regmap)) {  in atmel_classd_probe()
569 		ret = PTR_ERR(dd->regmap);  in atmel_classd_probe()
593 		ret = -ENOMEM;  in atmel_classd_probe()
619 		.name		= "atmel-classd",
627 MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture");