6  * Copyright 2007-2009 Freescale Semiconductor, Inc.  This file is licensed
15  * - Software mode is supported.  Stand-alone mode is not supported.
16  * - Only I2C is supported, not SPI
17  * - Support for master and slave mode
18  * - The machine driver's 'startup' function must call
20  * - Only I2S and left-justified modes are supported
21  * - Power management is supported
36  * The codec isn't really big-endian or little-endian, since the I2S
50 #define CS4270_PWRCTL	0x02	/* Power Control */
60 #define CS4270_NUMREGS	(CS4270_LASTREG - CS4270_FIRSTREG + 1)
110 /* Power-on default values for the registers
112  * This array contains the power-on default values of the registers, with the
134 	unsigned int mode; /* The mode (I2S or left-justified) */
138 	/* power domain regulators */
139 	struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];  member
162  * struct cs4270_mode_ratios - clock ratio tables
184  * double-speed instead of quad-speed.  However, the CS4270 errata states
185  * that divide-By-1.5 can cause failures, so we avoid that mode where
188  * Errata: There is an errata for the CS4270 where divide-by-1.5 does not
191  * never select any sample rates that require divide-by-1.5.
231  * cs4270_set_dai_sysclk - determine the CS4270 samples rates.
242  * supported values - 64, 96, 128, 192, 256, 384, 512, 768, and 1024.
260 	struct snd_soc_component *component = codec_dai->component;  in cs4270_set_dai_sysclk()
263 	cs4270->mclk = freq;  in cs4270_set_dai_sysclk()
268  * cs4270_set_dai_fmt - configure the codec for the selected audio format
276  * SND_SOC_DAIFMT_LEFT_J.  The CS4270 codec also supports right-justified
283 	struct snd_soc_component *component = codec_dai->component;  in cs4270_set_dai_fmt()
290 		cs4270->mode = format & SND_SOC_DAIFMT_FORMAT_MASK;  in cs4270_set_dai_fmt()
293 		dev_err(component->dev, "invalid dai format\n");  in cs4270_set_dai_fmt()
294 		return -EINVAL;  in cs4270_set_dai_fmt()
300 		cs4270->slave_mode = 1;  in cs4270_set_dai_fmt()
303 		cs4270->slave_mode = 0;  in cs4270_set_dai_fmt()
307 		dev_err(component->dev, "Unknown master/slave configuration\n");  in cs4270_set_dai_fmt()
308 		return -EINVAL;  in cs4270_set_dai_fmt()
315  * cs4270_hw_params - program the CS4270 with the given hardware parameters.
323  * The .ops functions are used to provide board-specific data, like input
332 	struct snd_soc_component *component = dai->component;  in cs4270_hw_params()
343 	ratio = cs4270->mclk / rate;	/* MCLK/LRCK ratio */  in cs4270_hw_params()
352 		dev_err(component->dev, "could not find matching ratio\n");  in cs4270_hw_params()
353 		return -EINVAL;  in cs4270_hw_params()
362 	if (cs4270->slave_mode)  in cs4270_hw_params()
369 		dev_err(component->dev, "i2c write failed\n");  in cs4270_hw_params()
378 	switch (cs4270->mode) {  in cs4270_hw_params()
386 		dev_err(component->dev, "unknown dai format\n");  in cs4270_hw_params()
387 		return -EINVAL;  in cs4270_hw_params()
392 		dev_err(component->dev, "i2c write failed\n");  in cs4270_hw_params()
400  * cs4270_dai_mute - enable/disable the CS4270 external mute
412 	struct snd_soc_component *component = dai->component;  in cs4270_dai_mute()
422 		reg6 |= cs4270->manual_mute;  in cs4270_dai_mute()
429  * cs4270_soc_put_mute - put callback for the 'Master Playback switch'
447 	int left = !ucontrol->value.integer.value[0];  in cs4270_soc_put_mute()
448 	int right = !ucontrol->value.integer.value[1];  in cs4270_soc_put_mute()
450 	cs4270->manual_mute = (left ? CS4270_MUTE_DAC_A : 0) |  in cs4270_soc_put_mute()
456 /* A list of non-DAPM controls that the CS4270 supports */
463 	SOC_SINGLE("De-emphasis filter", CS4270_TRANS, 0, 1, 0),
465 	SOC_SINGLE("Auto-Mute Switch", CS4270_MUTE, 5, 1, 0),
480 	.name = "cs4270-hifi",
503  * cs4270_probe - ASoC probe function
514 	/* Disable auto-mute.  This feature appears to be buggy.  In some  in cs4270_probe()
515 	 * situations, auto-mute will not deactivate when it should, so we want  in cs4270_probe()
517 	 * re-enabled it by using the controls.  in cs4270_probe()
521 		dev_err(component->dev, "i2c write failed\n");  in cs4270_probe()
528 	 * re-enabled it by using the controls.  in cs4270_probe()
533 		dev_err(component->dev, "i2c write failed\n");  in cs4270_probe()
537 	ret = regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),  in cs4270_probe()
538 				    cs4270->supplies);  in cs4270_probe()
544  * cs4270_remove - ASoC remove function
553 	regulator_bulk_disable(ARRAY_SIZE(cs4270->supplies), cs4270->supplies);  in cs4270_remove()
558 /* This suspend/resume implementation can handle both - a simple standby
563  * The codec's own power saving features are enabled in the suspend callback,
580 	regulator_bulk_disable(ARRAY_SIZE(cs4270->supplies),  in cs4270_soc_suspend()
581 			       cs4270->supplies);  in cs4270_soc_suspend()
591 	ret = regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),  in cs4270_soc_resume()
592 				    cs4270->supplies);  in cs4270_soc_resume()
601 	regcache_sync(cs4270->regmap);  in cs4270_soc_resume()
603 	/* ... then disable the power-down bits */  in cs4270_soc_resume()
635  * cs4270_of_match - the device tree bindings
657  * cs4270_i2c_remove - deinitialize the I2C interface of the CS4270
660  * This function puts the chip into low power mode when the i2c device
667 	gpiod_set_value_cansleep(cs4270->reset_gpio, 0);  in cs4270_i2c_remove()
673  * cs4270_i2c_probe - initialize the I2C interface of the CS4270
687 	cs4270 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs4270_private),  in cs4270_i2c_probe()
690 		return -ENOMEM;  in cs4270_i2c_probe()
692 	/* get the power supply regulators */  in cs4270_i2c_probe()
694 		cs4270->supplies[i].supply = supply_names[i];  in cs4270_i2c_probe()
696 	ret = devm_regulator_bulk_get(&i2c_client->dev,  in cs4270_i2c_probe()
697 				      ARRAY_SIZE(cs4270->supplies),  in cs4270_i2c_probe()
698 				      cs4270->supplies);  in cs4270_i2c_probe()
703 	cs4270->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev, "reset",  in cs4270_i2c_probe()
705 	if (IS_ERR(cs4270->reset_gpio)) {  in cs4270_i2c_probe()
706 		dev_dbg(&i2c_client->dev, "Error getting CS4270 reset GPIO\n");  in cs4270_i2c_probe()
707 		return PTR_ERR(cs4270->reset_gpio);  in cs4270_i2c_probe()
710 	if (cs4270->reset_gpio) {  in cs4270_i2c_probe()
711 		dev_dbg(&i2c_client->dev, "Found reset GPIO\n");  in cs4270_i2c_probe()
712 		gpiod_set_value_cansleep(cs4270->reset_gpio, 1);  in cs4270_i2c_probe()
718 	cs4270->regmap = devm_regmap_init_i2c(i2c_client, &cs4270_regmap);  in cs4270_i2c_probe()
719 	if (IS_ERR(cs4270->regmap))  in cs4270_i2c_probe()
720 		return PTR_ERR(cs4270->regmap);  in cs4270_i2c_probe()
723 	ret = regmap_read(cs4270->regmap, CS4270_CHIPID, &val);  in cs4270_i2c_probe()
725 		dev_err(&i2c_client->dev, "failed to read i2c at addr %X\n",  in cs4270_i2c_probe()
726 		       i2c_client->addr);  in cs4270_i2c_probe()
731 		dev_err(&i2c_client->dev, "device at addr %X is not a CS4270\n",  in cs4270_i2c_probe()
732 		       i2c_client->addr);  in cs4270_i2c_probe()
733 		return -ENODEV;  in cs4270_i2c_probe()
736 	dev_info(&i2c_client->dev, "found device at i2c address %X\n",  in cs4270_i2c_probe()
737 		i2c_client->addr);  in cs4270_i2c_probe()
738 	dev_info(&i2c_client->dev, "hardware revision %X\n", val & 0xF);  in cs4270_i2c_probe()
742 	ret = devm_snd_soc_register_component(&i2c_client->dev,  in cs4270_i2c_probe()
748  * cs4270_id - I2C device IDs supported by this driver
757  * cs4270_i2c_driver - I2C device identification