1// SPDX-License-Identifier: GPL-2.0
2//
3// Copyright (c) 2020 BayLibre, SAS.
4// Author: Jerome Brunet <jbrunet@baylibre.com>
5
6#include <linux/clk.h>
7#include <linux/delay.h>
8#include <linux/module.h>
9#include <linux/regmap.h>
10#include <linux/regulator/consumer.h>
11#include <linux/reset.h>
12#include <sound/soc.h>
13#include <sound/tlv.h>
14
15#define BLOCK_EN	0x00
16#define  LORN_EN	0
17#define  LORP_EN	1
18#define  LOLN_EN	2
19#define  LOLP_EN	3
20#define  DACR_EN	4
21#define  DACL_EN	5
22#define  DACR_INV	20
23#define  DACL_INV	21
24#define  DACR_SRC	22
25#define  DACL_SRC	23
26#define  REFP_BUF_EN	BIT(12)
27#define  BIAS_CURRENT_EN BIT(13)
28#define  VMID_GEN_FAST	BIT(14)
29#define  VMID_GEN_EN	BIT(15)
30#define  I2S_MODE	BIT(30)
31#define VOL_CTRL0	0x04
32#define  GAIN_H		31
33#define  GAIN_L		23
34#define VOL_CTRL1	0x08
35#define  DAC_MONO	8
36#define  RAMP_RATE	10
37#define  VC_RAMP_MODE	12
38#define  MUTE_MODE	13
39#define  UNMUTE_MODE	14
40#define  DAC_SOFT_MUTE	15
41#define  DACR_VC	16
42#define  DACL_VC	24
43#define LINEOUT_CFG	0x0c
44#define  LORN_POL	0
45#define  LORP_POL	4
46#define  LOLN_POL	8
47#define  LOLP_POL	12
48#define POWER_CFG	0x10
49
50struct t9015 {
51	struct regulator *avdd;
52};
53
54static int t9015_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
55{
56	struct snd_soc_component *component = dai->component;
57	unsigned int val;
58
59	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
60	case SND_SOC_DAIFMT_CBM_CFM:
61		val = I2S_MODE;
62		break;
63
64	case SND_SOC_DAIFMT_CBS_CFS:
65		val = 0;
66		break;
67
68	default:
69		return -EINVAL;
70	}
71
72	snd_soc_component_update_bits(component, BLOCK_EN, I2S_MODE, val);
73
74	if (((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_I2S) &&
75	    ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_LEFT_J))
76		return -EINVAL;
77
78	return 0;
79}
80
81static const struct snd_soc_dai_ops t9015_dai_ops = {
82	.set_fmt = t9015_dai_set_fmt,
83};
84
85static struct snd_soc_dai_driver t9015_dai = {
86	.name = "t9015-hifi",
87	.playback = {
88		.stream_name = "Playback",
89		.channels_min = 1,
90		.channels_max = 2,
91		.rates = SNDRV_PCM_RATE_8000_96000,
92		.formats = (SNDRV_PCM_FMTBIT_S8 |
93			    SNDRV_PCM_FMTBIT_S16_LE |
94			    SNDRV_PCM_FMTBIT_S20_LE |
95			    SNDRV_PCM_FMTBIT_S24_LE),
96	},
97	.ops = &t9015_dai_ops,
98};
99
100static const DECLARE_TLV_DB_MINMAX_MUTE(dac_vol_tlv, -9525, 0);
101
102static const char * const ramp_rate_txt[] = { "Fast", "Slow" };
103static SOC_ENUM_SINGLE_DECL(ramp_rate_enum, VOL_CTRL1, RAMP_RATE,
104			    ramp_rate_txt);
105
106static const char * const dacr_in_txt[] = { "Right", "Left" };
107static SOC_ENUM_SINGLE_DECL(dacr_in_enum, BLOCK_EN, DACR_SRC, dacr_in_txt);
108
109static const char * const dacl_in_txt[] = { "Left", "Right" };
110static SOC_ENUM_SINGLE_DECL(dacl_in_enum, BLOCK_EN, DACL_SRC, dacl_in_txt);
111
112static const char * const mono_txt[] = { "Stereo", "Mono"};
113static SOC_ENUM_SINGLE_DECL(mono_enum, VOL_CTRL1, DAC_MONO, mono_txt);
114
115static const struct snd_kcontrol_new t9015_snd_controls[] = {
116	/* Volume Controls */
117	SOC_ENUM("Playback Channel Mode", mono_enum),
118	SOC_SINGLE("Playback Switch", VOL_CTRL1, DAC_SOFT_MUTE, 1, 1),
119	SOC_DOUBLE_TLV("Playback Volume", VOL_CTRL1, DACL_VC, DACR_VC,
120		       0xff, 0, dac_vol_tlv),
121
122	/* Ramp Controls */
123	SOC_ENUM("Ramp Rate", ramp_rate_enum),
124	SOC_SINGLE("Volume Ramp Switch", VOL_CTRL1, VC_RAMP_MODE, 1, 0),
125	SOC_SINGLE("Mute Ramp Switch", VOL_CTRL1, MUTE_MODE, 1, 0),
126	SOC_SINGLE("Unmute Ramp Switch", VOL_CTRL1, UNMUTE_MODE, 1, 0),
127};
128
129static const struct snd_kcontrol_new t9015_right_dac_mux =
130	SOC_DAPM_ENUM("Right DAC Source", dacr_in_enum);
131static const struct snd_kcontrol_new t9015_left_dac_mux =
132	SOC_DAPM_ENUM("Left DAC Source", dacl_in_enum);
133
134static const struct snd_soc_dapm_widget t9015_dapm_widgets[] = {
135	SND_SOC_DAPM_AIF_IN("Right IN", NULL, 0, SND_SOC_NOPM, 0, 0),
136	SND_SOC_DAPM_AIF_IN("Left IN", NULL, 0, SND_SOC_NOPM, 0, 0),
137	SND_SOC_DAPM_MUX("Right DAC Sel", SND_SOC_NOPM, 0, 0,
138			 &t9015_right_dac_mux),
139	SND_SOC_DAPM_MUX("Left DAC Sel", SND_SOC_NOPM, 0, 0,
140			 &t9015_left_dac_mux),
141	SND_SOC_DAPM_DAC("Right DAC", NULL, BLOCK_EN, DACR_EN, 0),
142	SND_SOC_DAPM_DAC("Left DAC",  NULL, BLOCK_EN, DACL_EN, 0),
143	SND_SOC_DAPM_OUT_DRV("Right- Driver", BLOCK_EN, LORN_EN, 0,
144			 NULL, 0),
145	SND_SOC_DAPM_OUT_DRV("Right+ Driver", BLOCK_EN, LORP_EN, 0,
146			 NULL, 0),
147	SND_SOC_DAPM_OUT_DRV("Left- Driver",  BLOCK_EN, LOLN_EN, 0,
148			 NULL, 0),
149	SND_SOC_DAPM_OUT_DRV("Left+ Driver",  BLOCK_EN, LOLP_EN, 0,
150			 NULL, 0),
151	SND_SOC_DAPM_OUTPUT("LORN"),
152	SND_SOC_DAPM_OUTPUT("LORP"),
153	SND_SOC_DAPM_OUTPUT("LOLN"),
154	SND_SOC_DAPM_OUTPUT("LOLP"),
155};
156
157static const struct snd_soc_dapm_route t9015_dapm_routes[] = {
158	{ "Right IN", NULL, "Playback" },
159	{ "Left IN",  NULL, "Playback" },
160	{ "Right DAC Sel", "Right", "Right IN" },
161	{ "Right DAC Sel", "Left",  "Left IN" },
162	{ "Left DAC Sel",  "Right", "Right IN" },
163	{ "Left DAC Sel",  "Left",  "Left IN" },
164	{ "Right DAC", NULL, "Right DAC Sel" },
165	{ "Left DAC",  NULL, "Left DAC Sel" },
166	{ "Right- Driver", NULL, "Right DAC" },
167	{ "Right+ Driver", NULL, "Right DAC" },
168	{ "Left- Driver",  NULL, "Left DAC"  },
169	{ "Left+ Driver",  NULL, "Left DAC"  },
170	{ "LORN", NULL, "Right- Driver", },
171	{ "LORP", NULL, "Right+ Driver", },
172	{ "LOLN", NULL, "Left- Driver",  },
173	{ "LOLP", NULL, "Left+ Driver",  },
174};
175
176static int t9015_set_bias_level(struct snd_soc_component *component,
177				enum snd_soc_bias_level level)
178{
179	struct t9015 *priv = snd_soc_component_get_drvdata(component);
180	enum snd_soc_bias_level now =
181		snd_soc_component_get_bias_level(component);
182	int ret;
183
184	switch (level) {
185	case SND_SOC_BIAS_ON:
186		snd_soc_component_update_bits(component, BLOCK_EN,
187					      BIAS_CURRENT_EN,
188					      BIAS_CURRENT_EN);
189		break;
190	case SND_SOC_BIAS_PREPARE:
191		snd_soc_component_update_bits(component, BLOCK_EN,
192					      BIAS_CURRENT_EN,
193					      0);
194		break;
195	case SND_SOC_BIAS_STANDBY:
196		ret = regulator_enable(priv->avdd);
197		if (ret) {
198			dev_err(component->dev, "AVDD enable failed\n");
199			return ret;
200		}
201
202		if (now == SND_SOC_BIAS_OFF) {
203			snd_soc_component_update_bits(component, BLOCK_EN,
204				VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN,
205				VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN);
206
207			mdelay(200);
208			snd_soc_component_update_bits(component, BLOCK_EN,
209						      VMID_GEN_FAST,
210						      0);
211		}
212
213		break;
214	case SND_SOC_BIAS_OFF:
215		snd_soc_component_update_bits(component, BLOCK_EN,
216			VMID_GEN_EN | VMID_GEN_FAST | REFP_BUF_EN,
217			0);
218
219		regulator_disable(priv->avdd);
220		break;
221	}
222
223	return 0;
224}
225
226static const struct snd_soc_component_driver t9015_codec_driver = {
227	.set_bias_level		= t9015_set_bias_level,
228	.controls		= t9015_snd_controls,
229	.num_controls		= ARRAY_SIZE(t9015_snd_controls),
230	.dapm_widgets		= t9015_dapm_widgets,
231	.num_dapm_widgets	= ARRAY_SIZE(t9015_dapm_widgets),
232	.dapm_routes		= t9015_dapm_routes,
233	.num_dapm_routes	= ARRAY_SIZE(t9015_dapm_routes),
234	.suspend_bias_off	= 1,
235	.endianness		= 1,
236};
237
238static const struct regmap_config t9015_regmap_config = {
239	.reg_bits		= 32,
240	.reg_stride		= 4,
241	.val_bits		= 32,
242	.max_register		= POWER_CFG,
243};
244
245static int t9015_probe(struct platform_device *pdev)
246{
247	struct device *dev = &pdev->dev;
248	struct t9015 *priv;
249	void __iomem *regs;
250	struct regmap *regmap;
251	struct clk *pclk;
252	int ret;
253
254	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
255	if (!priv)
256		return -ENOMEM;
257	platform_set_drvdata(pdev, priv);
258
259	pclk = devm_clk_get_enabled(dev, "pclk");
260	if (IS_ERR(pclk))
261		return dev_err_probe(dev, PTR_ERR(pclk), "failed to get core clock\n");
262
263	priv->avdd = devm_regulator_get(dev, "AVDD");
264	if (IS_ERR(priv->avdd))
265		return dev_err_probe(dev, PTR_ERR(priv->avdd), "failed to AVDD\n");
266
267	ret = device_reset(dev);
268	if (ret) {
269		dev_err(dev, "reset failed\n");
270		return ret;
271	}
272
273	regs = devm_platform_ioremap_resource(pdev, 0);
274	if (IS_ERR(regs)) {
275		dev_err(dev, "register map failed\n");
276		return PTR_ERR(regs);
277	}
278
279	regmap = devm_regmap_init_mmio(dev, regs, &t9015_regmap_config);
280	if (IS_ERR(regmap)) {
281		dev_err(dev, "regmap init failed\n");
282		return PTR_ERR(regmap);
283	}
284
285	/*
286	 * Initialize output polarity:
287	 * ATM the output polarity is fixed but in the future it might useful
288	 * to add DT property to set this depending on the platform needs
289	 */
290	regmap_write(regmap, LINEOUT_CFG, 0x1111);
291
292	return devm_snd_soc_register_component(dev, &t9015_codec_driver,
293					       &t9015_dai, 1);
294}
295
296static const struct of_device_id t9015_ids[] __maybe_unused = {
297	{ .compatible = "amlogic,t9015", },
298	{ }
299};
300MODULE_DEVICE_TABLE(of, t9015_ids);
301
302static struct platform_driver t9015_driver = {
303	.driver = {
304		.name = "t9015-codec",
305		.of_match_table = of_match_ptr(t9015_ids),
306	},
307	.probe = t9015_probe,
308};
309
310module_platform_driver(t9015_driver);
311
312MODULE_DESCRIPTION("ASoC Amlogic T9015 codec driver");
313MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
314MODULE_LICENSE("GPL");
315