1 // SPDX-License-Identifier: GPL-2.0
32 	u32 channels;  member
44 		return -EINVAL;  in xlnx_i2s_set_sclkout_div()
46 	drv_data->sysclk = 0;  in xlnx_i2s_set_sclkout_div()
48 	writel(div, drv_data->base + I2S_I2STIM_OFFSET);  in xlnx_i2s_set_sclkout_div()
58 	drv_data->sysclk = freq;  in xlnx_i2s_set_sysclk()
62 		if (drv_data->is_32bit_lrclk)  in xlnx_i2s_set_sysclk()
65 			bits_per_sample = drv_data->data_width;  in xlnx_i2s_set_sysclk()
67 		drv_data->ratnum.num = freq / (bits_per_sample * drv_data->channels) / 2;  in xlnx_i2s_set_sysclk()
68 		drv_data->ratnum.den_step = 1;  in xlnx_i2s_set_sysclk()
69 		drv_data->ratnum.den_min = 1;  in xlnx_i2s_set_sysclk()
70 		drv_data->ratnum.den_max = 255;  in xlnx_i2s_set_sysclk()
71 		drv_data->rate_constraints.rats = &drv_data->ratnum;  in xlnx_i2s_set_sysclk()
72 		drv_data->rate_constraints.nrats = 1;  in xlnx_i2s_set_sysclk()
82 	if (drv_data->sysclk)  in xlnx_i2s_startup()
83 		return snd_pcm_hw_constraint_ratnums(substream->runtime, 0,  in xlnx_i2s_startup()
85 						     &drv_data->rate_constraints);  in xlnx_i2s_startup()
97 	if (drv_data->sysclk) {  in xlnx_i2s_hw_params()
100 		if (drv_data->is_32bit_lrclk)  in xlnx_i2s_hw_params()
103 			bits_per_sample = drv_data->data_width;  in xlnx_i2s_hw_params()
106 		sclk_div = drv_data->sysclk / sclk / 2;  in xlnx_i2s_hw_params()
108 		if ((drv_data->sysclk % sclk != 0) ||  in xlnx_i2s_hw_params()
110 			dev_warn(i2s_dai->dev, "invalid SCLK divisor for sysclk %u and sclk %u\n",  in xlnx_i2s_hw_params()
111 				 drv_data->sysclk, sclk);  in xlnx_i2s_hw_params()
112 			return -EINVAL;  in xlnx_i2s_hw_params()
114 		writel(sclk_div, drv_data->base + I2S_I2STIM_OFFSET);  in xlnx_i2s_hw_params()
120 		reg_off = I2S_CH0_OFFSET + ((chan_id - 1) * 4);  in xlnx_i2s_hw_params()
121 		writel(chan_id, drv_data->base + reg_off);  in xlnx_i2s_hw_params()
122 		chan_id--;  in xlnx_i2s_hw_params()
137 		writel(I2S_CORE_CTRL_ENABLE, drv_data->base + I2S_CORE_CTRL_OFFSET);  in xlnx_i2s_trigger()
142 		writel(0, drv_data->base + I2S_CORE_CTRL_OFFSET);  in xlnx_i2s_trigger()
145 		return -EINVAL;  in xlnx_i2s_trigger()
165 	{ .compatible = "xlnx,i2s-transmitter-1.0", },
166 	{ .compatible = "xlnx,i2s-receiver-1.0", },
176 	struct device *dev = &pdev->dev;  in xlnx_i2s_probe()
177 	struct device_node *node = dev->of_node;  in xlnx_i2s_probe()
179 	drv_data = devm_kzalloc(&pdev->dev, sizeof(*drv_data), GFP_KERNEL);  in xlnx_i2s_probe()
181 		return -ENOMEM;  in xlnx_i2s_probe()
183 	drv_data->base = devm_platform_ioremap_resource(pdev, 0);  in xlnx_i2s_probe()
184 	if (IS_ERR(drv_data->base))  in xlnx_i2s_probe()
185 		return PTR_ERR(drv_data->base);  in xlnx_i2s_probe()
187 	ret = of_property_read_u32(node, "xlnx,num-channels", &drv_data->channels);  in xlnx_i2s_probe()
189 		dev_err(dev, "cannot get supported channels\n");  in xlnx_i2s_probe()
192 	drv_data->channels *= 2;  in xlnx_i2s_probe()
194 	ret = of_property_read_u32(node, "xlnx,dwidth", &drv_data->data_width);  in xlnx_i2s_probe()
199 	switch (drv_data->data_width) {  in xlnx_i2s_probe()
207 		return -EINVAL;  in xlnx_i2s_probe()
210 	if (of_device_is_compatible(node, "xlnx,i2s-transmitter-1.0")) {  in xlnx_i2s_probe()
211 		drv_data->dai_drv.name = "xlnx_i2s_playback";  in xlnx_i2s_probe()
212 		drv_data->dai_drv.playback.stream_name = "Playback";  in xlnx_i2s_probe()
213 		drv_data->dai_drv.playback.formats = format;  in xlnx_i2s_probe()
214 		drv_data->dai_drv.playback.channels_min = drv_data->channels;  in xlnx_i2s_probe()
215 		drv_data->dai_drv.playback.channels_max = drv_data->channels;  in xlnx_i2s_probe()
216 		drv_data->dai_drv.playback.rates	= SNDRV_PCM_RATE_8000_192000;  in xlnx_i2s_probe()
217 		drv_data->dai_drv.ops = &xlnx_i2s_dai_ops;  in xlnx_i2s_probe()
218 	} else if (of_device_is_compatible(node, "xlnx,i2s-receiver-1.0")) {  in xlnx_i2s_probe()
219 		drv_data->dai_drv.name = "xlnx_i2s_capture";  in xlnx_i2s_probe()
220 		drv_data->dai_drv.capture.stream_name = "Capture";  in xlnx_i2s_probe()
221 		drv_data->dai_drv.capture.formats = format;  in xlnx_i2s_probe()
222 		drv_data->dai_drv.capture.channels_min = drv_data->channels;  in xlnx_i2s_probe()
223 		drv_data->dai_drv.capture.channels_max = drv_data->channels;  in xlnx_i2s_probe()
224 		drv_data->dai_drv.capture.rates = SNDRV_PCM_RATE_8000_192000;  in xlnx_i2s_probe()
225 		drv_data->dai_drv.ops = &xlnx_i2s_dai_ops;  in xlnx_i2s_probe()
227 		return -ENODEV;  in xlnx_i2s_probe()
229 	drv_data->is_32bit_lrclk = readl(drv_data->base + I2S_CORE_CTRL_OFFSET) &  in xlnx_i2s_probe()
232 	dev_set_drvdata(&pdev->dev, drv_data);  in xlnx_i2s_probe()
234 	ret = devm_snd_soc_register_component(&pdev->dev, &xlnx_i2s_component,  in xlnx_i2s_probe()
235 					      &drv_data->dai_drv, 1);  in xlnx_i2s_probe()
237 		dev_err(&pdev->dev, "i2s component registration failed\n");  in xlnx_i2s_probe()
241 	dev_info(&pdev->dev, "%s DAI registered\n", drv_data->dai_drv.name);  in xlnx_i2s_probe()