Commit | Line | Data |
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493b67ef PU |
1 | /* |
2 | * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver | |
3 | * | |
4 | * Copyright (C) Nokia Corporation | |
5 | * | |
b4079ef4 | 6 | * Author: Peter Ujfalusi <peter.ujfalusi@ti.com> |
493b67ef PU |
7 | * |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
20 | * 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/device.h> | |
26 | #include <linux/i2c.h> | |
27 | #include <linux/gpio.h> | |
7c4e6492 | 28 | #include <linux/regulator/consumer.h> |
5a0e3ad6 | 29 | #include <linux/slab.h> |
493b67ef PU |
30 | #include <sound/tpa6130a2-plat.h> |
31 | #include <sound/soc.h> | |
493b67ef PU |
32 | #include <sound/tlv.h> |
33 | ||
34 | #include "tpa6130a2.h" | |
35 | ||
0722d055 PU |
36 | enum tpa_model { |
37 | TPA6130A2, | |
38 | TPA6140A2, | |
39 | }; | |
40 | ||
ebab1b1d | 41 | static struct i2c_client *tpa6130a2_client; |
493b67ef PU |
42 | |
43 | /* This struct is used to save the context */ | |
44 | struct tpa6130a2_data { | |
45 | struct mutex mutex; | |
46 | unsigned char regs[TPA6130A2_CACHEREGNUM]; | |
ad8332c1 | 47 | struct regulator *supply; |
493b67ef | 48 | int power_gpio; |
d5876ce1 | 49 | u8 power_state:1; |
e5e5b31e | 50 | enum tpa_model id; |
493b67ef PU |
51 | }; |
52 | ||
53 | static int tpa6130a2_i2c_read(int reg) | |
54 | { | |
55 | struct tpa6130a2_data *data; | |
56 | int val; | |
57 | ||
58 | BUG_ON(tpa6130a2_client == NULL); | |
59 | data = i2c_get_clientdata(tpa6130a2_client); | |
60 | ||
61 | /* If powered off, return the cached value */ | |
62 | if (data->power_state) { | |
63 | val = i2c_smbus_read_byte_data(tpa6130a2_client, reg); | |
64 | if (val < 0) | |
65 | dev_err(&tpa6130a2_client->dev, "Read failed\n"); | |
66 | else | |
67 | data->regs[reg] = val; | |
68 | } else { | |
69 | val = data->regs[reg]; | |
70 | } | |
71 | ||
72 | return val; | |
73 | } | |
74 | ||
75 | static int tpa6130a2_i2c_write(int reg, u8 value) | |
76 | { | |
77 | struct tpa6130a2_data *data; | |
78 | int val = 0; | |
79 | ||
80 | BUG_ON(tpa6130a2_client == NULL); | |
81 | data = i2c_get_clientdata(tpa6130a2_client); | |
82 | ||
83 | if (data->power_state) { | |
84 | val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value); | |
7a479b02 | 85 | if (val < 0) { |
493b67ef | 86 | dev_err(&tpa6130a2_client->dev, "Write failed\n"); |
7a479b02 AL |
87 | return val; |
88 | } | |
493b67ef PU |
89 | } |
90 | ||
91 | /* Either powered on or off, we save the context */ | |
92 | data->regs[reg] = value; | |
93 | ||
94 | return val; | |
95 | } | |
96 | ||
97 | static u8 tpa6130a2_read(int reg) | |
98 | { | |
99 | struct tpa6130a2_data *data; | |
100 | ||
101 | BUG_ON(tpa6130a2_client == NULL); | |
102 | data = i2c_get_clientdata(tpa6130a2_client); | |
103 | ||
104 | return data->regs[reg]; | |
105 | } | |
106 | ||
872a64d7 | 107 | static int tpa6130a2_initialize(void) |
493b67ef PU |
108 | { |
109 | struct tpa6130a2_data *data; | |
872a64d7 | 110 | int i, ret = 0; |
493b67ef PU |
111 | |
112 | BUG_ON(tpa6130a2_client == NULL); | |
113 | data = i2c_get_clientdata(tpa6130a2_client); | |
114 | ||
872a64d7 PU |
115 | for (i = 1; i < TPA6130A2_REG_VERSION; i++) { |
116 | ret = tpa6130a2_i2c_write(i, data->regs[i]); | |
117 | if (ret < 0) | |
118 | break; | |
119 | } | |
120 | ||
121 | return ret; | |
493b67ef PU |
122 | } |
123 | ||
d5876ce1 | 124 | static int tpa6130a2_power(u8 power) |
493b67ef PU |
125 | { |
126 | struct tpa6130a2_data *data; | |
127 | u8 val; | |
75e3f313 | 128 | int ret = 0; |
493b67ef PU |
129 | |
130 | BUG_ON(tpa6130a2_client == NULL); | |
131 | data = i2c_get_clientdata(tpa6130a2_client); | |
132 | ||
133 | mutex_lock(&data->mutex); | |
d5876ce1 PU |
134 | if (power == data->power_state) |
135 | goto exit; | |
7c4e6492 | 136 | |
d5876ce1 | 137 | if (power) { |
ad8332c1 | 138 | ret = regulator_enable(data->supply); |
7c4e6492 IK |
139 | if (ret != 0) { |
140 | dev_err(&tpa6130a2_client->dev, | |
ad8332c1 | 141 | "Failed to enable supply: %d\n", ret); |
7c4e6492 | 142 | goto exit; |
493b67ef | 143 | } |
0656f6cf JN |
144 | /* Power on */ |
145 | if (data->power_gpio >= 0) | |
146 | gpio_set_value(data->power_gpio, 1); | |
7c4e6492 IK |
147 | |
148 | data->power_state = 1; | |
872a64d7 PU |
149 | ret = tpa6130a2_initialize(); |
150 | if (ret < 0) { | |
151 | dev_err(&tpa6130a2_client->dev, | |
152 | "Failed to initialize chip\n"); | |
153 | if (data->power_gpio >= 0) | |
154 | gpio_set_value(data->power_gpio, 0); | |
155 | regulator_disable(data->supply); | |
156 | data->power_state = 0; | |
157 | goto exit; | |
158 | } | |
d5876ce1 | 159 | } else { |
493b67ef PU |
160 | /* set SWS */ |
161 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
162 | val |= TPA6130A2_SWS; | |
163 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); | |
7c4e6492 | 164 | |
493b67ef | 165 | /* Power off */ |
7c4e6492 | 166 | if (data->power_gpio >= 0) |
493b67ef | 167 | gpio_set_value(data->power_gpio, 0); |
7c4e6492 | 168 | |
ad8332c1 | 169 | ret = regulator_disable(data->supply); |
7c4e6492 IK |
170 | if (ret != 0) { |
171 | dev_err(&tpa6130a2_client->dev, | |
ad8332c1 | 172 | "Failed to disable supply: %d\n", ret); |
7c4e6492 | 173 | goto exit; |
493b67ef | 174 | } |
7c4e6492 IK |
175 | |
176 | data->power_state = 0; | |
493b67ef | 177 | } |
7c4e6492 IK |
178 | |
179 | exit: | |
493b67ef | 180 | mutex_unlock(&data->mutex); |
7c4e6492 | 181 | return ret; |
493b67ef PU |
182 | } |
183 | ||
bd843edf | 184 | static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol, |
493b67ef PU |
185 | struct snd_ctl_elem_value *ucontrol) |
186 | { | |
187 | struct soc_mixer_control *mc = | |
188 | (struct soc_mixer_control *)kcontrol->private_value; | |
189 | struct tpa6130a2_data *data; | |
190 | unsigned int reg = mc->reg; | |
191 | unsigned int shift = mc->shift; | |
bd843edf PU |
192 | int max = mc->max; |
193 | unsigned int mask = (1 << fls(max)) - 1; | |
493b67ef PU |
194 | unsigned int invert = mc->invert; |
195 | ||
196 | BUG_ON(tpa6130a2_client == NULL); | |
197 | data = i2c_get_clientdata(tpa6130a2_client); | |
198 | ||
199 | mutex_lock(&data->mutex); | |
200 | ||
201 | ucontrol->value.integer.value[0] = | |
202 | (tpa6130a2_read(reg) >> shift) & mask; | |
203 | ||
204 | if (invert) | |
205 | ucontrol->value.integer.value[0] = | |
bd843edf | 206 | max - ucontrol->value.integer.value[0]; |
493b67ef PU |
207 | |
208 | mutex_unlock(&data->mutex); | |
209 | return 0; | |
210 | } | |
211 | ||
bd843edf | 212 | static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol, |
493b67ef PU |
213 | struct snd_ctl_elem_value *ucontrol) |
214 | { | |
215 | struct soc_mixer_control *mc = | |
216 | (struct soc_mixer_control *)kcontrol->private_value; | |
217 | struct tpa6130a2_data *data; | |
218 | unsigned int reg = mc->reg; | |
219 | unsigned int shift = mc->shift; | |
bd843edf PU |
220 | int max = mc->max; |
221 | unsigned int mask = (1 << fls(max)) - 1; | |
493b67ef PU |
222 | unsigned int invert = mc->invert; |
223 | unsigned int val = (ucontrol->value.integer.value[0] & mask); | |
224 | unsigned int val_reg; | |
225 | ||
226 | BUG_ON(tpa6130a2_client == NULL); | |
227 | data = i2c_get_clientdata(tpa6130a2_client); | |
228 | ||
229 | if (invert) | |
bd843edf | 230 | val = max - val; |
493b67ef PU |
231 | |
232 | mutex_lock(&data->mutex); | |
233 | ||
234 | val_reg = tpa6130a2_read(reg); | |
235 | if (((val_reg >> shift) & mask) == val) { | |
236 | mutex_unlock(&data->mutex); | |
237 | return 0; | |
238 | } | |
239 | ||
240 | val_reg &= ~(mask << shift); | |
241 | val_reg |= val << shift; | |
242 | tpa6130a2_i2c_write(reg, val_reg); | |
243 | ||
244 | mutex_unlock(&data->mutex); | |
245 | ||
246 | return 1; | |
247 | } | |
248 | ||
249 | /* | |
250 | * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going | |
251 | * down in gain. | |
252 | */ | |
253 | static const unsigned int tpa6130_tlv[] = { | |
254 | TLV_DB_RANGE_HEAD(10), | |
255 | 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0), | |
256 | 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0), | |
257 | 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0), | |
258 | 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0), | |
259 | 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0), | |
260 | 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0), | |
261 | 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0), | |
262 | 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0), | |
263 | 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0), | |
264 | 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0), | |
265 | }; | |
266 | ||
267 | static const struct snd_kcontrol_new tpa6130a2_controls[] = { | |
268 | SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume", | |
269 | TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0, | |
bd843edf | 270 | tpa6130a2_get_volsw, tpa6130a2_put_volsw, |
493b67ef PU |
271 | tpa6130_tlv), |
272 | }; | |
273 | ||
e5e5b31e PU |
274 | static const unsigned int tpa6140_tlv[] = { |
275 | TLV_DB_RANGE_HEAD(3), | |
276 | 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0), | |
277 | 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0), | |
278 | 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0), | |
279 | }; | |
280 | ||
281 | static const struct snd_kcontrol_new tpa6140a2_controls[] = { | |
826e962c PU |
282 | SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume", |
283 | TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0, | |
bd843edf | 284 | tpa6130a2_get_volsw, tpa6130a2_put_volsw, |
826e962c | 285 | tpa6140_tlv), |
e5e5b31e PU |
286 | }; |
287 | ||
493b67ef PU |
288 | /* |
289 | * Enable or disable channel (left or right) | |
290 | * The bit number for mute and amplifier are the same per channel: | |
291 | * bit 6: Right channel | |
292 | * bit 7: Left channel | |
293 | * in both registers. | |
294 | */ | |
295 | static void tpa6130a2_channel_enable(u8 channel, int enable) | |
296 | { | |
493b67ef PU |
297 | u8 val; |
298 | ||
493b67ef PU |
299 | if (enable) { |
300 | /* Enable channel */ | |
301 | /* Enable amplifier */ | |
302 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
303 | val |= channel; | |
d534bacd | 304 | val &= ~TPA6130A2_SWS; |
493b67ef PU |
305 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); |
306 | ||
307 | /* Unmute channel */ | |
308 | val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); | |
309 | val &= ~channel; | |
310 | tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); | |
311 | } else { | |
312 | /* Disable channel */ | |
313 | /* Mute channel */ | |
314 | val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); | |
315 | val |= channel; | |
316 | tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); | |
317 | ||
318 | /* Disable amplifier */ | |
319 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
320 | val &= ~channel; | |
321 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); | |
322 | } | |
323 | } | |
324 | ||
39646871 | 325 | int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable) |
493b67ef | 326 | { |
7c4e6492 | 327 | int ret = 0; |
39646871 | 328 | if (enable) { |
7c4e6492 | 329 | ret = tpa6130a2_power(1); |
39646871 PU |
330 | if (ret < 0) |
331 | return ret; | |
332 | tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L, | |
333 | 1); | |
334 | } else { | |
335 | tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L, | |
336 | 0); | |
7c4e6492 | 337 | ret = tpa6130a2_power(0); |
493b67ef | 338 | } |
39646871 | 339 | |
7c4e6492 | 340 | return ret; |
493b67ef | 341 | } |
39646871 | 342 | EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable); |
493b67ef PU |
343 | |
344 | int tpa6130a2_add_controls(struct snd_soc_codec *codec) | |
345 | { | |
e5e5b31e PU |
346 | struct tpa6130a2_data *data; |
347 | ||
872a64d7 PU |
348 | if (tpa6130a2_client == NULL) |
349 | return -ENODEV; | |
350 | ||
e5e5b31e PU |
351 | data = i2c_get_clientdata(tpa6130a2_client); |
352 | ||
e5e5b31e PU |
353 | if (data->id == TPA6140A2) |
354 | return snd_soc_add_controls(codec, tpa6140a2_controls, | |
355 | ARRAY_SIZE(tpa6140a2_controls)); | |
356 | else | |
357 | return snd_soc_add_controls(codec, tpa6130a2_controls, | |
358 | ARRAY_SIZE(tpa6130a2_controls)); | |
493b67ef PU |
359 | } |
360 | EXPORT_SYMBOL_GPL(tpa6130a2_add_controls); | |
361 | ||
735fe4cf MB |
362 | static int __devinit tpa6130a2_probe(struct i2c_client *client, |
363 | const struct i2c_device_id *id) | |
493b67ef PU |
364 | { |
365 | struct device *dev; | |
366 | struct tpa6130a2_data *data; | |
367 | struct tpa6130a2_platform_data *pdata; | |
ad8332c1 JN |
368 | const char *regulator; |
369 | int ret; | |
493b67ef PU |
370 | |
371 | dev = &client->dev; | |
372 | ||
373 | if (client->dev.platform_data == NULL) { | |
374 | dev_err(dev, "Platform data not set\n"); | |
375 | dump_stack(); | |
376 | return -ENODEV; | |
377 | } | |
378 | ||
6945e9f9 | 379 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
493b67ef PU |
380 | if (data == NULL) { |
381 | dev_err(dev, "Can not allocate memory\n"); | |
382 | return -ENOMEM; | |
383 | } | |
384 | ||
385 | tpa6130a2_client = client; | |
386 | ||
387 | i2c_set_clientdata(tpa6130a2_client, data); | |
388 | ||
ebab1b1d | 389 | pdata = client->dev.platform_data; |
493b67ef | 390 | data->power_gpio = pdata->power_gpio; |
07441006 | 391 | data->id = id->driver_data; |
493b67ef PU |
392 | |
393 | mutex_init(&data->mutex); | |
394 | ||
395 | /* Set default register values */ | |
396 | data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS; | |
397 | data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R | | |
398 | TPA6130A2_MUTE_L; | |
399 | ||
400 | if (data->power_gpio >= 0) { | |
401 | ret = gpio_request(data->power_gpio, "tpa6130a2 enable"); | |
402 | if (ret < 0) { | |
403 | dev_err(dev, "Failed to request power GPIO (%d)\n", | |
404 | data->power_gpio); | |
7c4e6492 | 405 | goto err_gpio; |
493b67ef PU |
406 | } |
407 | gpio_direction_output(data->power_gpio, 0); | |
493b67ef PU |
408 | } |
409 | ||
e5e5b31e | 410 | switch (data->id) { |
ad8332c1 JN |
411 | default: |
412 | dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n", | |
07441006 | 413 | data->id); |
2138301e | 414 | case TPA6130A2: |
ad8332c1 | 415 | regulator = "Vdd"; |
2138301e IK |
416 | break; |
417 | case TPA6140A2: | |
ad8332c1 | 418 | regulator = "AVdd"; |
2138301e | 419 | break; |
2138301e | 420 | } |
7c4e6492 | 421 | |
ad8332c1 JN |
422 | data->supply = regulator_get(dev, regulator); |
423 | if (IS_ERR(data->supply)) { | |
424 | ret = PTR_ERR(data->supply); | |
425 | dev_err(dev, "Failed to request supply: %d\n", ret); | |
7c4e6492 IK |
426 | goto err_regulator; |
427 | } | |
428 | ||
429 | ret = tpa6130a2_power(1); | |
430 | if (ret != 0) | |
431 | goto err_power; | |
432 | ||
493b67ef PU |
433 | |
434 | /* Read version */ | |
435 | ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) & | |
436 | TPA6130A2_VERSION_MASK; | |
437 | if ((ret != 1) && (ret != 2)) | |
438 | dev_warn(dev, "UNTESTED version detected (%d)\n", ret); | |
439 | ||
440 | /* Disable the chip */ | |
7c4e6492 IK |
441 | ret = tpa6130a2_power(0); |
442 | if (ret != 0) | |
443 | goto err_power; | |
493b67ef PU |
444 | |
445 | return 0; | |
7c4e6492 IK |
446 | |
447 | err_power: | |
ad8332c1 | 448 | regulator_put(data->supply); |
7c4e6492 IK |
449 | err_regulator: |
450 | if (data->power_gpio >= 0) | |
451 | gpio_free(data->power_gpio); | |
452 | err_gpio: | |
ebab1b1d | 453 | tpa6130a2_client = NULL; |
493b67ef PU |
454 | |
455 | return ret; | |
456 | } | |
457 | ||
735fe4cf | 458 | static int __devexit tpa6130a2_remove(struct i2c_client *client) |
493b67ef PU |
459 | { |
460 | struct tpa6130a2_data *data = i2c_get_clientdata(client); | |
461 | ||
462 | tpa6130a2_power(0); | |
463 | ||
464 | if (data->power_gpio >= 0) | |
465 | gpio_free(data->power_gpio); | |
7c4e6492 | 466 | |
ad8332c1 | 467 | regulator_put(data->supply); |
ebab1b1d | 468 | tpa6130a2_client = NULL; |
493b67ef PU |
469 | |
470 | return 0; | |
471 | } | |
472 | ||
473 | static const struct i2c_device_id tpa6130a2_id[] = { | |
07441006 PU |
474 | { "tpa6130a2", TPA6130A2 }, |
475 | { "tpa6140a2", TPA6140A2 }, | |
493b67ef PU |
476 | { } |
477 | }; | |
478 | MODULE_DEVICE_TABLE(i2c, tpa6130a2_id); | |
479 | ||
480 | static struct i2c_driver tpa6130a2_i2c_driver = { | |
481 | .driver = { | |
482 | .name = "tpa6130a2", | |
483 | .owner = THIS_MODULE, | |
484 | }, | |
485 | .probe = tpa6130a2_probe, | |
486 | .remove = __devexit_p(tpa6130a2_remove), | |
487 | .id_table = tpa6130a2_id, | |
488 | }; | |
489 | ||
490 | static int __init tpa6130a2_init(void) | |
491 | { | |
492 | return i2c_add_driver(&tpa6130a2_i2c_driver); | |
493 | } | |
494 | ||
495 | static void __exit tpa6130a2_exit(void) | |
496 | { | |
497 | i2c_del_driver(&tpa6130a2_i2c_driver); | |
498 | } | |
499 | ||
b4079ef4 | 500 | MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>"); |
493b67ef PU |
501 | MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver"); |
502 | MODULE_LICENSE("GPL"); | |
503 | ||
504 | module_init(tpa6130a2_init); | |
505 | module_exit(tpa6130a2_exit); |