1 // SPDX-License-Identifier: GPL-2.0-only
5  * (c) 2007-2008 MSC Vertriebsges.m.b.H.,
8  * Au1xxx-PSC I2S glue.
10  * NOTE: so far only PSC slave mode (bit- and frameclock) is supported.
21 #include <asm/mach-au1x00/au1000.h>
22 #include <asm/mach-au1x00/au1xxx_psc.h>
26 /* supported I2S DAI hardware formats */
31 /* supported I2S direction */
58 	ret = -EINVAL;  in au1xpsc_i2s_set_fmt()
60 	ct = pscdata->cfg;  in au1xpsc_i2s_set_fmt()
62 	ct &= ~(PSC_I2SCFG_XM | PSC_I2SCFG_MLJ);	/* left-justified */  in au1xpsc_i2s_set_fmt()
65 		ct |= PSC_I2SCFG_XM;	/* enable I2S mode */  in au1xpsc_i2s_set_fmt()
70 		ct |= PSC_I2SCFG_MLJ;	/* LSB (right-) justified */  in au1xpsc_i2s_set_fmt()
73 		goto out;  in au1xpsc_i2s_set_fmt()
76 	ct &= ~(PSC_I2SCFG_BI | PSC_I2SCFG_WI);		/* IB-IF */  in au1xpsc_i2s_set_fmt()
90 		goto out;  in au1xpsc_i2s_set_fmt()
95 		ct |= PSC_I2SCFG_MS;	/* PSC I2S consumer mode */  in au1xpsc_i2s_set_fmt()
98 		ct &= ~PSC_I2SCFG_MS;	/* PSC I2S provider mode */  in au1xpsc_i2s_set_fmt()
101 		goto out;  in au1xpsc_i2s_set_fmt()
104 	pscdata->cfg = ct;  in au1xpsc_i2s_set_fmt()
106 out:  in au1xpsc_i2s_set_fmt()
124 		if ((PSC_I2SCFG_GET_LEN(cfgbits) != params->msbits) ||  in au1xpsc_i2s_hw_params()
125 		    (params_rate(params) != pscdata->rate))  in au1xpsc_i2s_hw_params()
126 			return -EINVAL;  in au1xpsc_i2s_hw_params()
129 		pscdata->cfg &= ~(0x1f << 4);  in au1xpsc_i2s_hw_params()
130 		pscdata->cfg |= PSC_I2SCFG_SET_LEN(params->msbits);  in au1xpsc_i2s_hw_params()
132 		pscdata->rate = params_rate(params);  in au1xpsc_i2s_hw_params()
137 /* Configure PSC late:  on my devel systems the codec  is I2S master and
148 	/* bring PSC out of sleep, and configure I2S unit */  in au1xpsc_i2s_configure()
154 		tmo--;  in au1xpsc_i2s_configure()
161 	__raw_writel(pscdata->cfg | PSC_I2SCFG_DE_ENABLE, I2S_CFG(pscdata));  in au1xpsc_i2s_configure()
164 	/* wait for I2S controller to become ready */  in au1xpsc_i2s_configure()
167 		tmo--;  in au1xpsc_i2s_configure()
176 	return -ETIMEDOUT;  in au1xpsc_i2s_configure()
191 			goto out;  in au1xpsc_i2s_start()
202 		tmo--;  in au1xpsc_i2s_start()
207 		ret = -ETIMEDOUT;  in au1xpsc_i2s_start()
209 out:  in au1xpsc_i2s_start()
223 		tmo--;  in au1xpsc_i2s_stop()
240 	int ret, stype = substream->stream;  in au1xpsc_i2s_trigger()
252 		ret = -EINVAL;  in au1xpsc_i2s_trigger()
261 	snd_soc_dai_set_dma_data(dai, substream, &pscdata->dmaids[0]);  in au1xpsc_i2s_startup()
289 	.name			= "au1xpsc-i2s",
299 	wd = devm_kzalloc(&pdev->dev, sizeof(struct au1xpsc_audio_data),  in au1xpsc_i2s_drvprobe()
302 		return -ENOMEM;  in au1xpsc_i2s_drvprobe()
304 	wd->mmio = devm_platform_ioremap_resource(pdev, 0);  in au1xpsc_i2s_drvprobe()
305 	if (IS_ERR(wd->mmio))  in au1xpsc_i2s_drvprobe()
306 		return PTR_ERR(wd->mmio);  in au1xpsc_i2s_drvprobe()
310 		return -EBUSY;  in au1xpsc_i2s_drvprobe()
311 	wd->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start;  in au1xpsc_i2s_drvprobe()
315 		return -EBUSY;  in au1xpsc_i2s_drvprobe()
316 	wd->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start;  in au1xpsc_i2s_drvprobe()
329 	wd->cfg |= PSC_I2SCFG_RT_FIFO8 | PSC_I2SCFG_TT_FIFO8;  in au1xpsc_i2s_drvprobe()
331 	/* don't wait for I2S core to become ready now; clocks may not  in au1xpsc_i2s_drvprobe()
333 	 * time out.  in au1xpsc_i2s_drvprobe()
336 	/* name the DAI like this device instance ("au1xpsc-i2s.PSCINDEX") */  in au1xpsc_i2s_drvprobe()
337 	memcpy(&wd->dai_drv, &au1xpsc_i2s_dai_template,  in au1xpsc_i2s_drvprobe()
339 	wd->dai_drv.name = dev_name(&pdev->dev);  in au1xpsc_i2s_drvprobe()
343 	return devm_snd_soc_register_component(&pdev->dev,  in au1xpsc_i2s_drvprobe()
344 				&au1xpsc_i2s_component, &wd->dai_drv, 1);  in au1xpsc_i2s_drvprobe()
363 	wd->pm[0] = __raw_readl(PSC_SEL(wd));  in au1xpsc_i2s_drvsuspend()
377 	/* select I2S mode and PSC clock */  in au1xpsc_i2s_drvresume()
382 	__raw_writel(wd->pm[0], PSC_SEL(wd));  in au1xpsc_i2s_drvresume()
413 MODULE_DESCRIPTION("Au12x0/Au1550 PSC I2S ALSA ASoC audio driver");