soc/sh/ssi.c

1 // SPDX-License-Identifier: GPL-2.0
21  *	The number of bits sent over the wire in a frame can be adjusted
24  *	fixed TDM slot size, regardless of sample resolution.
62 #define SSIREG(reg)	(*(unsigned long *)(ssi->mmio + (reg)))
86  * track usage of the SSI; it is simplex-only so prevent attempts of
92 	struct ssi_priv *ssi = &ssi_cpu_data[dai->id];  in ssi_startup()
93 	if (ssi->inuse) {  in ssi_startup()
95 		return -EBUSY;  in ssi_startup()
97 		ssi->inuse = 1;  in ssi_startup()
104 	struct ssi_priv *ssi = &ssi_cpu_data[dai->id];  in ssi_shutdown()
106 	ssi->inuse = 0;  in ssi_shutdown()
112 	struct ssi_priv *ssi = &ssi_cpu_data[dai->id];  in ssi_trigger()
122 		return -EINVAL;  in ssi_trigger()
132 	struct ssi_priv *ssi = &ssi_cpu_data[dai->id];  in ssi_hw_params()
137 	bits = params->msbits;  in ssi_hw_params()
138 	recv = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 0 : 1;  in ssi_hw_params()
152 		pr_debug("ssi: invalid number of channels\n");  in ssi_hw_params()
153 		return -EINVAL;  in ssi_hw_params()
155 	ssicr |= ((channels >> 1) - 1) << CR_CHNL_SHIFT;  in ssi_hw_params()
170 		return -EINVAL;  in ssi_hw_params()
174 	 * SYSTEM WORD LENGTH: size in bits of half a frame over the I2S  in ssi_hw_params()
175 	 * wires. This is usually bits_per_sample x channels/2;  i.e. in  in ssi_hw_params()
177 	 * product of (channels_per_slot x samplebits), e.g.  for codecs  in ssi_hw_params()
180 	 * Waiting for ASoC to get TDM support ;-)  in ssi_hw_params()
199 		return -EINVAL;  in ssi_hw_params()
211 	struct ssi_priv *ssi = &ssi_cpu_data[cpu_dai->id];  in ssi_set_sysclk()
213 	ssi->sysclk = freq;  in ssi_set_sysclk()
224 	struct ssi_priv *ssi = &ssi_cpu_data[dai->id];  in ssi_set_clkdiv()
239 		return -EINVAL;  in ssi_set_clkdiv()
247 	struct ssi_priv *ssi = &ssi_cpu_data[dai->id];  in ssi_set_fmt()
266 		return -EINVAL;  in ssi_set_fmt()
291 		return -EINVAL;  in ssi_set_fmt()
308 		return -EINVAL;  in ssi_set_fmt()
324 /* the SSI can do 8-32 bit samples, with 8 possible channels */
344 	.name			= "ssi-dai.0",
361 	.name			= "ssi-dai.1",
380 	.name			= "sh4-ssi",
386 	return devm_snd_soc_register_component(&pdev->dev, &sh4_ssi_component,  in sh4_soc_dai_probe()
393 			.name = "sh4-ssi-dai",