2 * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver
4 * Copyright (C) Nokia Corporation
6 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
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.
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.
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
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>
28 #include <linux/regulator/consumer.h>
29 #include <linux/slab.h>
30 #include <sound/tpa6130a2-plat.h>
31 #include <sound/soc.h>
32 #include <sound/tlv.h>
34 #include "tpa6130a2.h"
41 static struct i2c_client *tpa6130a2_client;
43 /* This struct is used to save the context */
44 struct tpa6130a2_data {
46 unsigned char regs[TPA6130A2_CACHEREGNUM];
47 struct regulator *supply;
53 static int tpa6130a2_i2c_read(int reg)
55 struct tpa6130a2_data *data;
58 BUG_ON(tpa6130a2_client == NULL);
59 data = i2c_get_clientdata(tpa6130a2_client);
61 /* If powered off, return the cached value */
62 if (data->power_state) {
63 val = i2c_smbus_read_byte_data(tpa6130a2_client, reg);
65 dev_err(&tpa6130a2_client->dev, "Read failed\n");
67 data->regs[reg] = val;
69 val = data->regs[reg];
75 static int tpa6130a2_i2c_write(int reg, u8 value)
77 struct tpa6130a2_data *data;
80 BUG_ON(tpa6130a2_client == NULL);
81 data = i2c_get_clientdata(tpa6130a2_client);
83 if (data->power_state) {
84 val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value);
86 dev_err(&tpa6130a2_client->dev, "Write failed\n");
91 /* Either powered on or off, we save the context */
92 data->regs[reg] = value;
97 static u8 tpa6130a2_read(int reg)
99 struct tpa6130a2_data *data;
101 BUG_ON(tpa6130a2_client == NULL);
102 data = i2c_get_clientdata(tpa6130a2_client);
104 return data->regs[reg];
107 static int tpa6130a2_initialize(void)
109 struct tpa6130a2_data *data;
112 BUG_ON(tpa6130a2_client == NULL);
113 data = i2c_get_clientdata(tpa6130a2_client);
115 for (i = 1; i < TPA6130A2_REG_VERSION; i++) {
116 ret = tpa6130a2_i2c_write(i, data->regs[i]);
124 static int tpa6130a2_power(u8 power)
126 struct tpa6130a2_data *data;
130 BUG_ON(tpa6130a2_client == NULL);
131 data = i2c_get_clientdata(tpa6130a2_client);
133 mutex_lock(&data->mutex);
134 if (power == data->power_state)
138 ret = regulator_enable(data->supply);
140 dev_err(&tpa6130a2_client->dev,
141 "Failed to enable supply: %d\n", ret);
145 if (data->power_gpio >= 0)
146 gpio_set_value(data->power_gpio, 1);
148 data->power_state = 1;
149 ret = tpa6130a2_initialize();
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;
161 val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
162 val |= TPA6130A2_SWS;
163 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
166 if (data->power_gpio >= 0)
167 gpio_set_value(data->power_gpio, 0);
169 ret = regulator_disable(data->supply);
171 dev_err(&tpa6130a2_client->dev,
172 "Failed to disable supply: %d\n", ret);
176 data->power_state = 0;
180 mutex_unlock(&data->mutex);
184 static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
185 struct snd_ctl_elem_value *ucontrol)
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;
193 unsigned int mask = (1 << fls(max)) - 1;
194 unsigned int invert = mc->invert;
196 BUG_ON(tpa6130a2_client == NULL);
197 data = i2c_get_clientdata(tpa6130a2_client);
199 mutex_lock(&data->mutex);
201 ucontrol->value.integer.value[0] =
202 (tpa6130a2_read(reg) >> shift) & mask;
205 ucontrol->value.integer.value[0] =
206 max - ucontrol->value.integer.value[0];
208 mutex_unlock(&data->mutex);
212 static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol,
213 struct snd_ctl_elem_value *ucontrol)
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;
221 unsigned int mask = (1 << fls(max)) - 1;
222 unsigned int invert = mc->invert;
223 unsigned int val = (ucontrol->value.integer.value[0] & mask);
224 unsigned int val_reg;
226 BUG_ON(tpa6130a2_client == NULL);
227 data = i2c_get_clientdata(tpa6130a2_client);
232 mutex_lock(&data->mutex);
234 val_reg = tpa6130a2_read(reg);
235 if (((val_reg >> shift) & mask) == val) {
236 mutex_unlock(&data->mutex);
240 val_reg &= ~(mask << shift);
241 val_reg |= val << shift;
242 tpa6130a2_i2c_write(reg, val_reg);
244 mutex_unlock(&data->mutex);
250 * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
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),
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,
270 tpa6130a2_get_volsw, tpa6130a2_put_volsw,
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),
281 static const struct snd_kcontrol_new tpa6140a2_controls[] = {
282 SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
283 TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
284 tpa6130a2_get_volsw, tpa6130a2_put_volsw,
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
295 static void tpa6130a2_channel_enable(u8 channel, int enable)
301 /* Enable amplifier */
302 val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
304 val &= ~TPA6130A2_SWS;
305 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
308 val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
310 tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
312 /* Disable channel */
314 val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
316 tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
318 /* Disable amplifier */
319 val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
321 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
325 int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable)
329 ret = tpa6130a2_power(1);
332 tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L,
335 tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L,
337 ret = tpa6130a2_power(0);
342 EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable);
344 int tpa6130a2_add_controls(struct snd_soc_codec *codec)
346 struct tpa6130a2_data *data;
348 if (tpa6130a2_client == NULL)
351 data = i2c_get_clientdata(tpa6130a2_client);
353 if (data->id == TPA6140A2)
354 return snd_soc_add_codec_controls(codec, tpa6140a2_controls,
355 ARRAY_SIZE(tpa6140a2_controls));
357 return snd_soc_add_codec_controls(codec, tpa6130a2_controls,
358 ARRAY_SIZE(tpa6130a2_controls));
360 EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
362 static int __devinit tpa6130a2_probe(struct i2c_client *client,
363 const struct i2c_device_id *id)
366 struct tpa6130a2_data *data;
367 struct tpa6130a2_platform_data *pdata;
368 const char *regulator;
373 if (client->dev.platform_data == NULL) {
374 dev_err(dev, "Platform data not set\n");
379 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
381 dev_err(dev, "Can not allocate memory\n");
385 tpa6130a2_client = client;
387 i2c_set_clientdata(tpa6130a2_client, data);
389 pdata = client->dev.platform_data;
390 data->power_gpio = pdata->power_gpio;
391 data->id = id->driver_data;
393 mutex_init(&data->mutex);
395 /* Set default register values */
396 data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
397 data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R |
400 if (data->power_gpio >= 0) {
401 ret = gpio_request(data->power_gpio, "tpa6130a2 enable");
403 dev_err(dev, "Failed to request power GPIO (%d)\n",
407 gpio_direction_output(data->power_gpio, 0);
412 dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
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);
429 ret = tpa6130a2_power(1);
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);
440 /* Disable the chip */
441 ret = tpa6130a2_power(0);
448 regulator_put(data->supply);
450 if (data->power_gpio >= 0)
451 gpio_free(data->power_gpio);
453 tpa6130a2_client = NULL;
458 static int __devexit tpa6130a2_remove(struct i2c_client *client)
460 struct tpa6130a2_data *data = i2c_get_clientdata(client);
464 if (data->power_gpio >= 0)
465 gpio_free(data->power_gpio);
467 regulator_put(data->supply);
468 tpa6130a2_client = NULL;
473 static const struct i2c_device_id tpa6130a2_id[] = {
474 { "tpa6130a2", TPA6130A2 },
475 { "tpa6140a2", TPA6140A2 },
478 MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
480 static struct i2c_driver tpa6130a2_i2c_driver = {
483 .owner = THIS_MODULE,
485 .probe = tpa6130a2_probe,
486 .remove = __devexit_p(tpa6130a2_remove),
487 .id_table = tpa6130a2_id,
490 static int __init tpa6130a2_init(void)
492 return i2c_add_driver(&tpa6130a2_i2c_driver);
495 static void __exit tpa6130a2_exit(void)
497 i2c_del_driver(&tpa6130a2_i2c_driver);
500 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
501 MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
502 MODULE_LICENSE("GPL");
504 module_init(tpa6130a2_init);
505 module_exit(tpa6130a2_exit);