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