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
97static 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
112struct sta529 {
113	struct regmap *regmap;
114};
115
116static 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
139static const char *pwm_mode_text[] = { "Binary", "Headphone", "Ternary",
140	"Phase-shift"};
141
142static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -9150, 50, 0);
143static const DECLARE_TLV_DB_SCALE(master_vol_tlv, -12750, 50, 0);
144static SOC_ENUM_SINGLE_DECL(pwm_src, STA529_FFXCFG1, 4, pwm_mode_text);
145
146static 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
154static 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
186static 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
254static 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
266static 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
291static 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
298static 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
317static 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
327static 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_MAPLE,
335	.reg_defaults = sta529_reg_defaults,
336	.num_reg_defaults = ARRAY_SIZE(sta529_reg_defaults),
337};
338
339static 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
365static const struct i2c_device_id sta529_i2c_id[] = {
366	{ "sta529", 0 },
367	{ }
368};
369MODULE_DEVICE_TABLE(i2c, sta529_i2c_id);
370
371static const struct of_device_id sta529_of_match[] = {
372	{ .compatible = "st,sta529", },
373	{ }
374};
375MODULE_DEVICE_TABLE(of, sta529_of_match);
376
377static struct i2c_driver sta529_i2c_driver = {
378	.driver = {
379		.name = "sta529",
380		.of_match_table = sta529_of_match,
381	},
382	.probe		= sta529_i2c_probe,
383	.id_table	= sta529_i2c_id,
384};
385
386module_i2c_driver(sta529_i2c_driver);
387
388MODULE_DESCRIPTION("ASoC STA529 codec driver");
389MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
390MODULE_LICENSE("GPL");
391