1 // SPDX-License-Identifier: GPL-2.0-only
5  * (c) 2007-2009 MSC Vertriebsges.m.b.H.,
8  * Au1xxx-PSC AC97 glue.
22 #include <asm/mach-au1x00/au1000.h>
23 #include <asm/mach-au1x00/au1xxx_psc.h>
54 /* this could theoretically work, but ac97->bus->card->private_data can be NULL
60 	struct snd_soc_card *c = x->bus->card->private_data;
61 	return snd_soc_dai_get_drvdata(c->snd_soc_rtd_to_cpu(rtd, 0));
70 /* AC97 controller reads codec register */
71 static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,  in au1xpsc_ac97_read()  argument
74 	struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);  in au1xpsc_ac97_read()
83 		mutex_lock(&pscdata->lock);  in au1xpsc_ac97_read()
94 		} while (--tmo);  in au1xpsc_ac97_read()
101 		mutex_unlock(&pscdata->lock);  in au1xpsc_ac97_read()
106 	} while (--retry && !tmo);  in au1xpsc_ac97_read()
111 /* AC97 controller writes to codec register */
112 static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,  in au1xpsc_ac97_write()  argument
115 	struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);  in au1xpsc_ac97_write()
123 		mutex_lock(&pscdata->lock);  in au1xpsc_ac97_write()
134 		} while (--tmo);  in au1xpsc_ac97_write()
139 		mutex_unlock(&pscdata->lock);  in au1xpsc_ac97_write()
140 	} while (--retry && !tmo);  in au1xpsc_ac97_write()
143 /* AC97 controller asserts a warm reset */
144 static void au1xpsc_ac97_warm_reset(struct snd_ac97 *ac97)  in au1xpsc_ac97_warm_reset()  argument
146 	struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);  in au1xpsc_ac97_warm_reset()
155 static void au1xpsc_ac97_cold_reset(struct snd_ac97 *ac97)  in au1xpsc_ac97_cold_reset()  argument
157 	struct au1xpsc_audio_data *pscdata = ac97_to_pscdata(ac97);  in au1xpsc_ac97_cold_reset()
179 	while (!((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_SR)) && (--i))  in au1xpsc_ac97_cold_reset()
183 		printk(KERN_ERR "au1xpsc-ac97: PSC not ready!\n");  in au1xpsc_ac97_cold_reset()
187 	/* enable the ac97 function */  in au1xpsc_ac97_cold_reset()
188 	__raw_writel(pscdata->cfg | PSC_AC97CFG_DE_ENABLE, AC97_CFG(pscdata));  in au1xpsc_ac97_cold_reset()
191 	/* wait for AC97 core to become ready */  in au1xpsc_ac97_cold_reset()
193 	while (!((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && (--i))  in au1xpsc_ac97_cold_reset()
196 		printk(KERN_ERR "au1xpsc-ac97: AC97 ctrl not ready\n");  in au1xpsc_ac97_cold_reset()
199 /* AC97 controller operations */
213 	int chans, t, stype = substream->stream;  in au1xpsc_ac97_hw_params()
223 		if ((PSC_AC97CFG_GET_LEN(r) != params->msbits) ||  in au1xpsc_ac97_hw_params()
224 		    (pscdata->rate != params_rate(params)))  in au1xpsc_ac97_hw_params()
225 			return -EINVAL;  in au1xpsc_ac97_hw_params()
228 		/* set sample bitdepth: REG[24:21]=(BITS-2)/2 */  in au1xpsc_ac97_hw_params()
230 		r |= PSC_AC97CFG_SET_LEN(params->msbits);  in au1xpsc_ac97_hw_params()
247 		/* ac97 engine is about to be disabled */  in au1xpsc_ac97_hw_params()
248 		mutex_lock(&pscdata->lock);  in au1xpsc_ac97_hw_params()
250 		/* disable AC97 device controller first... */  in au1xpsc_ac97_hw_params()
256 		while ((__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR) && --t)  in au1xpsc_ac97_hw_params()
260 			printk(KERN_ERR "PSC-AC97: can't disable!\n");  in au1xpsc_ac97_hw_params()
266 		/* ...enable the AC97 controller again... */  in au1xpsc_ac97_hw_params()
272 		while ((!(__raw_readl(AC97_STAT(pscdata)) & PSC_AC97STAT_DR)) && --t)  in au1xpsc_ac97_hw_params()
276 			printk(KERN_ERR "PSC-AC97: can't enable!\n");  in au1xpsc_ac97_hw_params()
278 		mutex_unlock(&pscdata->lock);  in au1xpsc_ac97_hw_params()
280 		pscdata->cfg = r;  in au1xpsc_ac97_hw_params()
281 		pscdata->rate = params_rate(params);  in au1xpsc_ac97_hw_params()
292 	int ret, stype = substream->stream;  in au1xpsc_ac97_trigger()
317 		ret = -EINVAL;  in au1xpsc_ac97_trigger()
326 	snd_soc_dai_set_dma_data(dai, substream, &pscdata->dmaids[0]);  in au1xpsc_ac97_startup()
332 	return au1xpsc_ac97_workdata ? 0 : -ENODEV;  in au1xpsc_ac97_probe()
359 	.name			= "au1xpsc-ac97",
370 	wd = devm_kzalloc(&pdev->dev, sizeof(struct au1xpsc_audio_data),  in au1xpsc_ac97_drvprobe()
373 		return -ENOMEM;  in au1xpsc_ac97_drvprobe()
375 	mutex_init(&wd->lock);  in au1xpsc_ac97_drvprobe()
377 	wd->mmio = devm_platform_ioremap_resource(pdev, 0);  in au1xpsc_ac97_drvprobe()
378 	if (IS_ERR(wd->mmio))  in au1xpsc_ac97_drvprobe()
379 		return PTR_ERR(wd->mmio);  in au1xpsc_ac97_drvprobe()
383 		return -EBUSY;  in au1xpsc_ac97_drvprobe()
384 	wd->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start;  in au1xpsc_ac97_drvprobe()
388 		return -EBUSY;  in au1xpsc_ac97_drvprobe()
389 	wd->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start;  in au1xpsc_ac97_drvprobe()
391 	/* configuration: max dma trigger threshold, enable ac97 */  in au1xpsc_ac97_drvprobe()
392 	wd->cfg = PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8 |  in au1xpsc_ac97_drvprobe()
404 	/* name the DAI like this device instance ("au1xpsc-ac97.PSCINDEX") */  in au1xpsc_ac97_drvprobe()
405 	memcpy(&wd->dai_drv, &au1xpsc_ac97_dai_template,  in au1xpsc_ac97_drvprobe()
407 	wd->dai_drv.name = dev_name(&pdev->dev);  in au1xpsc_ac97_drvprobe()
415 	ret = snd_soc_register_component(&pdev->dev, &au1xpsc_ac97_component,  in au1xpsc_ac97_drvprobe()
416 					 &wd->dai_drv, 1);  in au1xpsc_ac97_drvprobe()
428 	snd_soc_unregister_component(&pdev->dev);  in au1xpsc_ac97_drvremove()
445 	wd->pm[0] = __raw_readl(PSC_SEL(wd));  in au1xpsc_ac97_drvsuspend()
460 	__raw_writel(wd->pm[0] | PSC_SEL_PS_AC97MODE, PSC_SEL(wd));  in au1xpsc_ac97_drvresume()
463 	/* after this point the ac97 core will cold-reset the codec.  in au1xpsc_ac97_drvresume()
464 	 * During cold-reset the PSC is reinitialized and the last  in au1xpsc_ac97_drvresume()
495 MODULE_DESCRIPTION("Au12x0/Au1550 PSC AC97 ALSA ASoC audio driver");