1 // SPDX-License-Identifier: GPL-2.0
3 // Common functions for loongson I2S controller driver
13 #include <linux/dma-mapping.h>
33 	struct loongson_i2s *i2s = snd_soc_dai_get_drvdata(dai);  in loongson_i2s_trigger()  local
41 		mask = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?  in loongson_i2s_trigger()
43 		regmap_update_bits(i2s->regmap, LS_I2S_CTRL, mask, mask);  in loongson_i2s_trigger()
48 		mask = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?  in loongson_i2s_trigger()
50 		regmap_update_bits(i2s->regmap, LS_I2S_CTRL, mask, 0);  in loongson_i2s_trigger()
53 		ret = -EINVAL;  in loongson_i2s_trigger()
63 	struct loongson_i2s *i2s = snd_soc_dai_get_drvdata(dai);  in loongson_i2s_hw_params()  local
64 	u32 clk_rate = i2s->clk_rate;  in loongson_i2s_hw_params()
65 	u32 sysclk = i2s->sysclk;  in loongson_i2s_hw_params()
73 	switch (i2s->rev_id) {  in loongson_i2s_hw_params()
76 					       (bits * chans * fs * 2)) - 1;  in loongson_i2s_hw_params()
77 		mclk_ratio = DIV_ROUND_CLOSEST(clk_rate, (sysclk * 2)) - 1;  in loongson_i2s_hw_params()
84 		regmap_write(i2s->regmap, LS_I2S_CFG, val);  in loongson_i2s_hw_params()
89 					       (bits * chans * fs * 2)) - 1;  in loongson_i2s_hw_params()
92 						    sysclk) - (mclk_ratio << 16);  in loongson_i2s_hw_params()
94 		regmap_read(i2s->regmap, LS_I2S_CFG, &val);  in loongson_i2s_hw_params()
97 		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)  in loongson_i2s_hw_params()
101 		regmap_write(i2s->regmap, LS_I2S_CFG, val);  in loongson_i2s_hw_params()
104 		regmap_write(i2s->regmap, LS_I2S_CFG1, val);  in loongson_i2s_hw_params()
108 		dev_err(i2s->dev, "I2S revision invalid\n");  in loongson_i2s_hw_params()
109 		return -EINVAL;  in loongson_i2s_hw_params()
118 	struct loongson_i2s *i2s = snd_soc_dai_get_drvdata(dai);  in loongson_i2s_set_dai_sysclk()  local
120 	i2s->sysclk = freq;  in loongson_i2s_set_dai_sysclk()
125 static int loongson_i2s_enable_mclk(struct loongson_i2s *i2s)  in loongson_i2s_enable_mclk()  argument
129 	if (i2s->rev_id == 0)  in loongson_i2s_enable_mclk()
132 	regmap_update_bits(i2s->regmap, LS_I2S_CTRL,  in loongson_i2s_enable_mclk()
135 	return regmap_read_poll_timeout_atomic(i2s->regmap,  in loongson_i2s_enable_mclk()
142 static int loongson_i2s_enable_bclk(struct loongson_i2s *i2s)  in loongson_i2s_enable_bclk()  argument
146 	if (i2s->rev_id == 0)  in loongson_i2s_enable_bclk()
149 	return regmap_read_poll_timeout_atomic(i2s->regmap,  in loongson_i2s_enable_bclk()
158 	struct loongson_i2s *i2s = snd_soc_dai_get_drvdata(dai);  in loongson_i2s_set_fmt()  local
165 		regmap_update_bits(i2s->regmap, LS_I2S_CTRL, I2S_CTRL_MSB,  in loongson_i2s_set_fmt()
169 		return -EINVAL;  in loongson_i2s_set_fmt()
178 		regmap_update_bits(i2s->regmap, LS_I2S_CTRL, I2S_CTRL_MASTER,  in loongson_i2s_set_fmt()
180 		ret = loongson_i2s_enable_bclk(i2s);  in loongson_i2s_set_fmt()
182 			dev_warn(dai->dev, "wait BCLK ready timeout\n");  in loongson_i2s_set_fmt()
186 		ret = loongson_i2s_enable_mclk(i2s);  in loongson_i2s_set_fmt()
188 			dev_warn(dai->dev, "wait MCLK ready timeout\n");  in loongson_i2s_set_fmt()
192 		ret = loongson_i2s_enable_mclk(i2s);  in loongson_i2s_set_fmt()
194 			dev_warn(dai->dev, "wait MCLK ready timeout\n");  in loongson_i2s_set_fmt()
197 		regmap_update_bits(i2s->regmap, LS_I2S_CTRL, I2S_CTRL_MASTER,  in loongson_i2s_set_fmt()
200 		ret = loongson_i2s_enable_bclk(i2s);  in loongson_i2s_set_fmt()
202 			dev_warn(dai->dev, "wait BCLK ready timeout\n");  in loongson_i2s_set_fmt()
205 		return -EINVAL;  in loongson_i2s_set_fmt()
213 	struct loongson_i2s *i2s = dev_get_drvdata(cpu_dai->dev);  in loongson_i2s_dai_probe()  local
215 	snd_soc_dai_init_dma_data(cpu_dai, &i2s->playback_dma_data,  in loongson_i2s_dai_probe()
216 				  &i2s->capture_dma_data);  in loongson_i2s_dai_probe()
217 	snd_soc_dai_set_drvdata(cpu_dai, i2s);  in loongson_i2s_dai_probe()
231 	.name = "loongson-i2s",
233 		.stream_name = "CPU-Playback",
240 		.stream_name = "CPU-Capture",
253 	struct loongson_i2s *i2s = dev_get_drvdata(dev);  in i2s_suspend()  local
255 	regcache_cache_only(i2s->regmap, true);  in i2s_suspend()
262 	struct loongson_i2s *i2s = dev_get_drvdata(dev);  in i2s_resume()  local
264 	regcache_cache_only(i2s->regmap, false);  in i2s_resume()
265 	regcache_mark_dirty(i2s->regmap);  in i2s_resume()
266 	return regcache_sync(i2s->regmap);  in i2s_resume()
275 MODULE_DESCRIPTION("Common functions for loongson I2S controller driver");