1 // SPDX-License-Identifier: GPL-2.0-only
8  *			Charles Eidsness <charles@cooper-street.com>
23 #include <asm/mach-au1x00/au1000.h>
57 /* how often to retry failed codec register reads/writes */
74 	return __raw_readl(ctx->mmio + reg);  in RD()
79 	__raw_writel(v, ctx->mmio + reg);  in WR()
87 	unsigned int tmo, retry;  in au1xac97c_ac97_read()  local
91 	retry = AC97_RW_RETRIES;  in au1xac97c_ac97_read()
93 		mutex_lock(&ctx->lock);  in au1xac97c_ac97_read()
96 		while ((RD(ctx, AC97_STATUS) & STAT_CP) && --tmo)  in au1xac97c_ac97_read()
97 			udelay(21);	/* wait an ac97 frame time */  in au1xac97c_ac97_read()
105 		/* stupid errata: data is only valid for 21us, so  in au1xac97c_ac97_read()
109 		while ((RD(ctx, AC97_STATUS) & STAT_CP) && --tmo)  in au1xac97c_ac97_read()
117 		mutex_unlock(&ctx->lock);  in au1xac97c_ac97_read()
118 	} while (--retry && !tmo);  in au1xac97c_ac97_read()
120 	pr_debug("AC97RD %04x %04lx %d\n", r, data, retry);  in au1xac97c_ac97_read()
122 	return retry ? data & 0xffff : 0xffff;  in au1xac97c_ac97_read()
129 	unsigned int tmo, retry;  in au1xac97c_ac97_write()  local
131 	retry = AC97_RW_RETRIES;  in au1xac97c_ac97_write()
133 		mutex_lock(&ctx->lock);  in au1xac97c_ac97_write()
135 		for (tmo = 5; (RD(ctx, AC97_STATUS) & STAT_CP) && tmo; tmo--)  in au1xac97c_ac97_write()
144 		for (tmo = 10; (RD(ctx, AC97_STATUS) & STAT_CP) && tmo; tmo--)  in au1xac97c_ac97_write()
149 		mutex_unlock(&ctx->lock);  in au1xac97c_ac97_write()
150 	} while (--retry && !tmo);  in au1xac97c_ac97_write()
152 	pr_debug("AC97WR %04x %04x %d\n", r, v, retry);  in au1xac97c_ac97_write()
159 	WR(ctx, AC97_CONFIG, ctx->cfg | CFG_SG | CFG_SN);  in au1xac97c_ac97_warm_reset()
161 	WR(ctx, AC97_CONFIG, ctx->cfg | CFG_SG);  in au1xac97c_ac97_warm_reset()
162 	WR(ctx, AC97_CONFIG, ctx->cfg);  in au1xac97c_ac97_warm_reset()
170 	WR(ctx, AC97_CONFIG, ctx->cfg | CFG_RS);  in au1xac97c_ac97_cold_reset()
172 	WR(ctx, AC97_CONFIG, ctx->cfg);  in au1xac97c_ac97_cold_reset()
174 	/* wait for codec ready */  in au1xac97c_ac97_cold_reset()
176 	while (((RD(ctx, AC97_STATUS) & STAT_RD) == 0) && --i)  in au1xac97c_ac97_cold_reset()
194 	snd_soc_dai_set_dma_data(dai, substream, &ctx->dmaids[0]);  in alchemy_ac97c_startup()
200 	return ac97c_workdata ? 0 : -ENODEV;  in au1xac97c_dai_probe()
209 	.name			= "alchemy-ac97c",
236 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);  in au1xac97c_drvprobe()
238 		return -ENOMEM;  in au1xac97c_drvprobe()
240 	mutex_init(&ctx->lock);  in au1xac97c_drvprobe()
244 		return -ENODEV;  in au1xac97c_drvprobe()
246 	if (!devm_request_mem_region(&pdev->dev, iores->start,  in au1xac97c_drvprobe()
248 				     pdev->name))  in au1xac97c_drvprobe()
249 		return -EBUSY;  in au1xac97c_drvprobe()
251 	ctx->mmio = devm_ioremap(&pdev->dev, iores->start,  in au1xac97c_drvprobe()
253 	if (!ctx->mmio)  in au1xac97c_drvprobe()
254 		return -EBUSY;  in au1xac97c_drvprobe()
258 		return -EBUSY;  in au1xac97c_drvprobe()
259 	ctx->dmaids[SNDRV_PCM_STREAM_PLAYBACK] = dmares->start;  in au1xac97c_drvprobe()
263 		return -EBUSY;  in au1xac97c_drvprobe()
264 	ctx->dmaids[SNDRV_PCM_STREAM_CAPTURE] = dmares->start;  in au1xac97c_drvprobe()
270 	ctx->cfg = CFG_RC(3) | CFG_XS(3);  in au1xac97c_drvprobe()
271 	WR(ctx, AC97_CONFIG, ctx->cfg);  in au1xac97c_drvprobe()
279 	ret = snd_soc_register_component(&pdev->dev, &au1xac97c_component,  in au1xac97c_drvprobe()
292 	snd_soc_unregister_component(&pdev->dev);  in au1xac97c_drvremove()
315 	WR(ctx, AC97_CONFIG, ctx->cfg);  in au1xac97c_drvresume()
335 		.name	= "alchemy-ac97c",