1 // SPDX-License-Identifier: GPL-2.0-only
3  * Au1000/Au1500/Au1100 I2S controller driver for ASoC
7  * Note: clock supplied to the I2S controller must be 256x samplerate.
18 #include <asm/mach-au1x00/au1000.h>
39 #define CFG_FM_I2S	(0 << 7)	/* I2S format */
40 #define CFG_FM_LJ	(1 << 7)	/* left-justified */
41 #define CFG_FM_RJ	(2 << 7)	/* right-justified */
72 	return __raw_readl(ctx->mmio + reg);  in RD()
77 	__raw_writel(v, ctx->mmio + reg);  in WR()
87 	ret = -EINVAL;  in au1xi2s_set_fmt()
88 	c = ctx->cfg;  in au1xi2s_set_fmt()
102 		goto out;  in au1xi2s_set_fmt()
105 	c &= ~(CFG_IC | CFG_ICK);		/* IB-IF */  in au1xi2s_set_fmt()
119 		goto out;  in au1xi2s_set_fmt()
122 	/* I2S controller only supports provider */  in au1xi2s_set_fmt()
127 		goto out;  in au1xi2s_set_fmt()
131 	ctx->cfg = c;  in au1xi2s_set_fmt()
132 out:  in au1xi2s_set_fmt()
148 		ctx->cfg |= (stype == PCM_TX) ? CFG_TN : CFG_RN;  in au1xi2s_trigger()
149 		WR(ctx, I2S_CFG, ctx->cfg);  in au1xi2s_trigger()
153 		ctx->cfg &= ~((stype == PCM_TX) ? CFG_TN : CFG_RN);  in au1xi2s_trigger()
154 		WR(ctx, I2S_CFG, ctx->cfg);  in au1xi2s_trigger()
158 		return -EINVAL;  in au1xi2s_trigger()
188 	v = msbits_to_reg(params->msbits);  in au1xi2s_hw_params()
190 		return -EINVAL;  in au1xi2s_hw_params()
192 	ctx->cfg &= ~CFG_SZ_MASK;  in au1xi2s_hw_params()
193 	ctx->cfg |= v;  in au1xi2s_hw_params()
201 	snd_soc_dai_set_dma_data(dai, substream, &ctx->dmaids[0]);  in au1xi2s_startup()
239 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);  in au1xi2s_drvprobe()
241 		return -ENOMEM;  in au1xi2s_drvprobe()
245 		return -ENODEV;  in au1xi2s_drvprobe()
247 	if (!devm_request_mem_region(&pdev->dev, iores->start,  in au1xi2s_drvprobe()
249 				     pdev->name))  in au1xi2s_drvprobe()
250 		return -EBUSY;  in au1xi2s_drvprobe()
252 	ctx->mmio = devm_ioremap(&pdev->dev, iores->start,  in au1xi2s_drvprobe()
254 	if (!ctx->mmio)  in au1xi2s_drvprobe()
255 		return -EBUSY;  in au1xi2s_drvprobe()
259 		return -EBUSY;  in au1xi2s_drvprobe()
260 	ctx->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start;  in au1xi2s_drvprobe()
264 		return -EBUSY;  in au1xi2s_drvprobe()
265 	ctx->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start;  in au1xi2s_drvprobe()
269 	return snd_soc_register_component(&pdev->dev, &au1xi2s_component,  in au1xi2s_drvprobe()
277 	snd_soc_unregister_component(&pdev->dev);  in au1xi2s_drvremove()
312 		.name	= "alchemy-i2sc",
322 MODULE_DESCRIPTION("Au1000/1500/1100 I2S ASoC driver");