xref: /linux/sound/soc/codecs/sta529.c (revision c6fbb759) 
1 /*
2  * ASoC codec driver for spear platform
3  *
4  * sound/soc/codecs/sta529.c -- spear ALSA Soc codec driver
5  *
6  * Copyright (C) 2012 ST Microelectronics
7  * Rajeev Kumar <rajeevkumar.linux@gmail.com>
8  *
9  * This file is licensed under the terms of the GNU General Public
10  * License version 2. This program is licensed "as is" without any
11  * warranty of any kind, whether express or implied.
12  */
13 
14 #include <linux/clk.h>
15 #include <linux/init.h>
16 #include <linux/i2c.h>
17 #include <linux/io.h>
18 #include <linux/module.h>
19 #include <linux/moduleparam.h>
20 #include <linux/pm.h>
21 #include <linux/regmap.h>
22 #include <linux/slab.h>
23 
24 #include <sound/core.h>
25 #include <sound/initval.h>
26 #include <sound/pcm.h>
27 #include <sound/pcm_params.h>
28 #include <sound/soc.h>
29 #include <sound/soc-dapm.h>
30 #include <sound/tlv.h>
31 
32 /* STA529 Register offsets */
33 #define	 STA529_FFXCFG0		0x00
34 #define	 STA529_FFXCFG1		0x01
35 #define	 STA529_MVOL		0x02
36 #define	 STA529_LVOL		0x03
37 #define	 STA529_RVOL		0x04
38 #define	 STA529_TTF0		0x05
39 #define	 STA529_TTF1		0x06
40 #define	 STA529_TTP0		0x07
41 #define	 STA529_TTP1		0x08
42 #define	 STA529_S2PCFG0		0x0A
43 #define	 STA529_S2PCFG1		0x0B
44 #define	 STA529_P2SCFG0		0x0C
45 #define	 STA529_P2SCFG1		0x0D
46 #define	 STA529_PLLCFG0		0x14
47 #define	 STA529_PLLCFG1		0x15
48 #define	 STA529_PLLCFG2		0x16
49 #define	 STA529_PLLCFG3		0x17
50 #define	 STA529_PLLPFE		0x18
51 #define	 STA529_PLLST		0x19
52 #define	 STA529_ADCCFG		0x1E /*mic_select*/
53 #define	 STA529_CKOCFG		0x1F
54 #define	 STA529_MISC		0x20
55 #define	 STA529_PADST0		0x21
56 #define	 STA529_PADST1		0x22
57 #define	 STA529_FFXST		0x23
58 #define	 STA529_PWMIN1		0x2D
59 #define	 STA529_PWMIN2		0x2E
60 #define	 STA529_POWST		0x32
61 
62 #define STA529_MAX_REGISTER	0x32
63 
64 #define STA529_RATES		(SNDRV_PCM_RATE_8000 | \
65 				SNDRV_PCM_RATE_11025 | \
66 				SNDRV_PCM_RATE_16000 | \
67 				SNDRV_PCM_RATE_22050 | \
68 				SNDRV_PCM_RATE_32000 | \
69 				SNDRV_PCM_RATE_44100 | \
70 				SNDRV_PCM_RATE_48000)
71 
72 #define STA529_FORMAT		(SNDRV_PCM_FMTBIT_S16_LE | \
73 				SNDRV_PCM_FMTBIT_S24_LE | \
74 				SNDRV_PCM_FMTBIT_S32_LE)
75 #define	S2PC_VALUE		0x98
76 #define CLOCK_OUT		0x60
77 #define DATA_FORMAT_MSK		0x0E
78 #define LEFT_J_DATA_FORMAT	0x00
79 #define I2S_DATA_FORMAT		0x02
80 #define RIGHT_J_DATA_FORMAT	0x04
81 #define CODEC_MUTE_VAL		0x80
82 
83 #define POWER_CNTLMSAK		0x40
84 #define POWER_STDBY		0x40
85 #define FFX_MASK		0x80
86 #define FFX_OFF			0x80
87 #define POWER_UP		0x00
88 #define FFX_CLK_ENB		0x01
89 #define FFX_CLK_DIS		0x00
90 #define FFX_CLK_MSK		0x01
91 #define PLAY_FREQ_RANGE_MSK	0x70
92 #define CAP_FREQ_RANGE_MSK	0x0C
93 #define PDATA_LEN_MSK		0xC0
94 #define BCLK_TO_FS_MSK		0x30
95 #define AUDIO_MUTE_MSK		0x80
96 
97 static const struct reg_default sta529_reg_defaults[] = {
98 	{ 0,  0x35 },     /* R0   - FFX Configuration reg 0 */
99 	{ 1,  0xc8 },     /* R1   - FFX Configuration reg 1 */
100 	{ 2,  0x50 },     /* R2   - Master Volume */
101 	{ 3,  0x00 },     /* R3   - Left Volume */
102 	{ 4,  0x00 },     /* R4  -  Right Volume */
103 	{ 10, 0xb2 },     /* R10  - S2P Config Reg 0 */
104 	{ 11, 0x41 },     /* R11  - S2P Config Reg 1 */
105 	{ 12, 0x92 },     /* R12  - P2S Config Reg 0 */
106 	{ 13, 0x41 },     /* R13  - P2S Config Reg 1 */
107 	{ 30, 0xd2 },     /* R30  - ADC Config Reg */
108 	{ 31, 0x40 },     /* R31  - clock Out Reg */
109 	{ 32, 0x21 },     /* R32  - Misc Register */
110 };
111 
112 struct sta529 {
113 	struct regmap *regmap;
114 };
115 
116 static bool sta529_readable(struct device *dev, unsigned int reg)
117 {
118 	switch (reg) {
119 
120 	case STA529_FFXCFG0:
121 	case STA529_FFXCFG1:
122 	case STA529_MVOL:
123 	case STA529_LVOL:
124 	case STA529_RVOL:
125 	case STA529_S2PCFG0:
126 	case STA529_S2PCFG1:
127 	case STA529_P2SCFG0:
128 	case STA529_P2SCFG1:
129 	case STA529_ADCCFG:
130 	case STA529_CKOCFG:
131 	case STA529_MISC:
132 		return true;
133 	default:
134 		return false;
135 	}
136 }
137 
138 
139 static const char *pwm_mode_text[] = { "Binary", "Headphone", "Ternary",
140 	"Phase-shift"};
141 
142 static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -9150, 50, 0);
143 static const DECLARE_TLV_DB_SCALE(master_vol_tlv, -12750, 50, 0);
144 static SOC_ENUM_SINGLE_DECL(pwm_src, STA529_FFXCFG1, 4, pwm_mode_text);
145 
146 static const struct snd_kcontrol_new sta529_snd_controls[] = {
147 	SOC_DOUBLE_R_TLV("Digital Playback Volume", STA529_LVOL, STA529_RVOL, 0,
148 			127, 0, out_gain_tlv),
149 	SOC_SINGLE_TLV("Master Playback Volume", STA529_MVOL, 0, 127, 1,
150 			master_vol_tlv),
151 	SOC_ENUM("PWM Select", pwm_src),
152 };
153 
154 static int sta529_set_bias_level(struct snd_soc_component *component, enum
155 		snd_soc_bias_level level)
156 {
157 	struct sta529 *sta529 = snd_soc_component_get_drvdata(component);
158 
159 	switch (level) {
160 	case SND_SOC_BIAS_ON:
161 	case SND_SOC_BIAS_PREPARE:
162 		snd_soc_component_update_bits(component, STA529_FFXCFG0, POWER_CNTLMSAK,
163 				POWER_UP);
164 		snd_soc_component_update_bits(component, STA529_MISC,	FFX_CLK_MSK,
165 				FFX_CLK_ENB);
166 		break;
167 	case SND_SOC_BIAS_STANDBY:
168 		if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)
169 			regcache_sync(sta529->regmap);
170 		snd_soc_component_update_bits(component, STA529_FFXCFG0,
171 					POWER_CNTLMSAK, POWER_STDBY);
172 		/* Making FFX output to zero */
173 		snd_soc_component_update_bits(component, STA529_FFXCFG0, FFX_MASK,
174 				FFX_OFF);
175 		snd_soc_component_update_bits(component, STA529_MISC, FFX_CLK_MSK,
176 				FFX_CLK_DIS);
177 		break;
178 	case SND_SOC_BIAS_OFF:
179 		break;
180 	}
181 
182 	return 0;
183 
184 }
185 
186 static int sta529_hw_params(struct snd_pcm_substream *substream,
187 		struct snd_pcm_hw_params *params,
188 		struct snd_soc_dai *dai)
189 {
190 	struct snd_soc_component *component = dai->component;
191 	int pdata, play_freq_val, record_freq_val;
192 	int bclk_to_fs_ratio;
193 
194 	switch (params_width(params)) {
195 	case 16:
196 		pdata = 1;
197 		bclk_to_fs_ratio = 0;
198 		break;
199 	case 24:
200 		pdata = 2;
201 		bclk_to_fs_ratio = 1;
202 		break;
203 	case 32:
204 		pdata = 3;
205 		bclk_to_fs_ratio = 2;
206 		break;
207 	default:
208 		dev_err(component->dev, "Unsupported format\n");
209 		return -EINVAL;
210 	}
211 
212 	switch (params_rate(params)) {
213 	case 8000:
214 	case 11025:
215 		play_freq_val = 0;
216 		record_freq_val = 2;
217 		break;
218 	case 16000:
219 	case 22050:
220 		play_freq_val = 1;
221 		record_freq_val = 0;
222 		break;
223 
224 	case 32000:
225 	case 44100:
226 	case 48000:
227 		play_freq_val = 2;
228 		record_freq_val = 0;
229 		break;
230 	default:
231 		dev_err(component->dev, "Unsupported rate\n");
232 		return -EINVAL;
233 	}
234 
235 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
236 		snd_soc_component_update_bits(component, STA529_S2PCFG1, PDATA_LEN_MSK,
237 				pdata << 6);
238 		snd_soc_component_update_bits(component, STA529_S2PCFG1, BCLK_TO_FS_MSK,
239 				bclk_to_fs_ratio << 4);
240 		snd_soc_component_update_bits(component, STA529_MISC, PLAY_FREQ_RANGE_MSK,
241 				play_freq_val << 4);
242 	} else {
243 		snd_soc_component_update_bits(component, STA529_P2SCFG1, PDATA_LEN_MSK,
244 				pdata << 6);
245 		snd_soc_component_update_bits(component, STA529_P2SCFG1, BCLK_TO_FS_MSK,
246 				bclk_to_fs_ratio << 4);
247 		snd_soc_component_update_bits(component, STA529_MISC, CAP_FREQ_RANGE_MSK,
248 				record_freq_val << 2);
249 	}
250 
251 	return 0;
252 }
253 
254 static int sta529_mute(struct snd_soc_dai *dai, int mute, int direction)
255 {
256 	u8 val = 0;
257 
258 	if (mute)
259 		val |= CODEC_MUTE_VAL;
260 
261 	snd_soc_component_update_bits(dai->component, STA529_FFXCFG0, AUDIO_MUTE_MSK, val);
262 
263 	return 0;
264 }
265 
266 static int sta529_set_dai_fmt(struct snd_soc_dai *codec_dai, u32 fmt)
267 {
268 	struct snd_soc_component *component = codec_dai->component;
269 	u8 mode = 0;
270 
271 	/* interface format */
272 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
273 	case SND_SOC_DAIFMT_LEFT_J:
274 		mode = LEFT_J_DATA_FORMAT;
275 		break;
276 	case SND_SOC_DAIFMT_I2S:
277 		mode = I2S_DATA_FORMAT;
278 		break;
279 	case SND_SOC_DAIFMT_RIGHT_J:
280 		mode = RIGHT_J_DATA_FORMAT;
281 		break;
282 	default:
283 		return -EINVAL;
284 	}
285 
286 	snd_soc_component_update_bits(component, STA529_S2PCFG0, DATA_FORMAT_MSK, mode);
287 
288 	return 0;
289 }
290 
291 static const struct snd_soc_dai_ops sta529_dai_ops = {
292 	.hw_params	=	sta529_hw_params,
293 	.set_fmt	=	sta529_set_dai_fmt,
294 	.mute_stream	=	sta529_mute,
295 	.no_capture_mute = 1,
296 };
297 
298 static struct snd_soc_dai_driver sta529_dai = {
299 	.name = "sta529-audio",
300 	.playback = {
301 		.stream_name = "Playback",
302 		.channels_min = 2,
303 		.channels_max = 2,
304 		.rates = STA529_RATES,
305 		.formats = STA529_FORMAT,
306 	},
307 	.capture = {
308 		.stream_name = "Capture",
309 		.channels_min = 2,
310 		.channels_max = 2,
311 		.rates = STA529_RATES,
312 		.formats = STA529_FORMAT,
313 	},
314 	.ops	= &sta529_dai_ops,
315 };
316 
317 static const struct snd_soc_component_driver sta529_component_driver = {
318 	.set_bias_level		= sta529_set_bias_level,
319 	.controls		= sta529_snd_controls,
320 	.num_controls		= ARRAY_SIZE(sta529_snd_controls),
321 	.suspend_bias_off	= 1,
322 	.idle_bias_on		= 1,
323 	.use_pmdown_time	= 1,
324 	.endianness		= 1,
325 };
326 
327 static const struct regmap_config sta529_regmap = {
328 	.reg_bits = 8,
329 	.val_bits = 8,
330 
331 	.max_register = STA529_MAX_REGISTER,
332 	.readable_reg = sta529_readable,
333 
334 	.cache_type = REGCACHE_RBTREE,
335 	.reg_defaults = sta529_reg_defaults,
336 	.num_reg_defaults = ARRAY_SIZE(sta529_reg_defaults),
337 };
338 
339 static int sta529_i2c_probe(struct i2c_client *i2c)
340 {
341 	struct sta529 *sta529;
342 	int ret;
343 
344 	sta529 = devm_kzalloc(&i2c->dev, sizeof(struct sta529), GFP_KERNEL);
345 	if (!sta529)
346 		return -ENOMEM;
347 
348 	sta529->regmap = devm_regmap_init_i2c(i2c, &sta529_regmap);
349 	if (IS_ERR(sta529->regmap)) {
350 		ret = PTR_ERR(sta529->regmap);
351 		dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
352 		return ret;
353 	}
354 
355 	i2c_set_clientdata(i2c, sta529);
356 
357 	ret = devm_snd_soc_register_component(&i2c->dev,
358 			&sta529_component_driver, &sta529_dai, 1);
359 	if (ret != 0)
360 		dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
361 
362 	return ret;
363 }
364 
365 static const struct i2c_device_id sta529_i2c_id[] = {
366 	{ "sta529", 0 },
367 	{ }
368 };
369 MODULE_DEVICE_TABLE(i2c, sta529_i2c_id);
370 
371 static const struct of_device_id sta529_of_match[] = {
372 	{ .compatible = "st,sta529", },
373 	{ }
374 };
375 MODULE_DEVICE_TABLE(of, sta529_of_match);
376 
377 static struct i2c_driver sta529_i2c_driver = {
378 	.driver = {
379 		.name = "sta529",
380 		.of_match_table = sta529_of_match,
381 	},
382 	.probe_new	= sta529_i2c_probe,
383 	.id_table	= sta529_i2c_id,
384 };
385 
386 module_i2c_driver(sta529_i2c_driver);
387 
388 MODULE_DESCRIPTION("ASoC STA529 codec driver");
389 MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
390 MODULE_LICENSE("GPL");
391