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 if (WARN_ON(!tpa6130a2_client))
60 data = i2c_get_clientdata(tpa6130a2_client);
62 /* If powered off, return the cached value */
63 if (data->power_state) {
64 val = i2c_smbus_read_byte_data(tpa6130a2_client, reg);
66 dev_err(&tpa6130a2_client->dev, "Read failed\n");
68 data->regs[reg] = val;
70 val = data->regs[reg];
76 static int tpa6130a2_i2c_write(int reg, u8 value)
78 struct tpa6130a2_data *data;
81 if (WARN_ON(!tpa6130a2_client))
83 data = i2c_get_clientdata(tpa6130a2_client);
85 if (data->power_state) {
86 val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value);
88 dev_err(&tpa6130a2_client->dev, "Write failed\n");
93 /* Either powered on or off, we save the context */
94 data->regs[reg] = value;
99 static u8 tpa6130a2_read(int reg)
101 struct tpa6130a2_data *data;
103 if (WARN_ON(!tpa6130a2_client))
105 data = i2c_get_clientdata(tpa6130a2_client);
107 return data->regs[reg];
110 static int tpa6130a2_initialize(void)
112 struct tpa6130a2_data *data;
115 if (WARN_ON(!tpa6130a2_client))
117 data = i2c_get_clientdata(tpa6130a2_client);
119 for (i = 1; i < TPA6130A2_REG_VERSION; i++) {
120 ret = tpa6130a2_i2c_write(i, data->regs[i]);
128 static int tpa6130a2_power(u8 power)
130 struct tpa6130a2_data *data;
134 if (WARN_ON(!tpa6130a2_client))
136 data = i2c_get_clientdata(tpa6130a2_client);
138 mutex_lock(&data->mutex);
139 if (power == data->power_state)
143 ret = regulator_enable(data->supply);
145 dev_err(&tpa6130a2_client->dev,
146 "Failed to enable supply: %d\n", ret);
150 if (data->power_gpio >= 0)
151 gpio_set_value(data->power_gpio, 1);
153 data->power_state = 1;
154 ret = tpa6130a2_initialize();
156 dev_err(&tpa6130a2_client->dev,
157 "Failed to initialize chip\n");
158 if (data->power_gpio >= 0)
159 gpio_set_value(data->power_gpio, 0);
160 regulator_disable(data->supply);
161 data->power_state = 0;
166 val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
167 val |= TPA6130A2_SWS;
168 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
171 if (data->power_gpio >= 0)
172 gpio_set_value(data->power_gpio, 0);
174 ret = regulator_disable(data->supply);
176 dev_err(&tpa6130a2_client->dev,
177 "Failed to disable supply: %d\n", ret);
181 data->power_state = 0;
185 mutex_unlock(&data->mutex);
189 static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
190 struct snd_ctl_elem_value *ucontrol)
192 struct soc_mixer_control *mc =
193 (struct soc_mixer_control *)kcontrol->private_value;
194 struct tpa6130a2_data *data;
195 unsigned int reg = mc->reg;
196 unsigned int shift = mc->shift;
198 unsigned int mask = (1 << fls(max)) - 1;
199 unsigned int invert = mc->invert;
201 if (WARN_ON(!tpa6130a2_client))
203 data = i2c_get_clientdata(tpa6130a2_client);
205 mutex_lock(&data->mutex);
207 ucontrol->value.integer.value[0] =
208 (tpa6130a2_read(reg) >> shift) & mask;
211 ucontrol->value.integer.value[0] =
212 max - ucontrol->value.integer.value[0];
214 mutex_unlock(&data->mutex);
218 static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol,
219 struct snd_ctl_elem_value *ucontrol)
221 struct soc_mixer_control *mc =
222 (struct soc_mixer_control *)kcontrol->private_value;
223 struct tpa6130a2_data *data;
224 unsigned int reg = mc->reg;
225 unsigned int shift = mc->shift;
227 unsigned int mask = (1 << fls(max)) - 1;
228 unsigned int invert = mc->invert;
229 unsigned int val = (ucontrol->value.integer.value[0] & mask);
230 unsigned int val_reg;
232 if (WARN_ON(!tpa6130a2_client))
234 data = i2c_get_clientdata(tpa6130a2_client);
239 mutex_lock(&data->mutex);
241 val_reg = tpa6130a2_read(reg);
242 if (((val_reg >> shift) & mask) == val) {
243 mutex_unlock(&data->mutex);
247 val_reg &= ~(mask << shift);
248 val_reg |= val << shift;
249 tpa6130a2_i2c_write(reg, val_reg);
251 mutex_unlock(&data->mutex);
257 * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
260 static const unsigned int tpa6130_tlv[] = {
261 TLV_DB_RANGE_HEAD(10),
262 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
263 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
264 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
265 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
266 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
267 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
268 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
269 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
270 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
271 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
274 static const struct snd_kcontrol_new tpa6130a2_controls[] = {
275 SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
276 TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
277 tpa6130a2_get_volsw, tpa6130a2_put_volsw,
281 static const unsigned int tpa6140_tlv[] = {
282 TLV_DB_RANGE_HEAD(3),
283 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
284 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
285 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
288 static const struct snd_kcontrol_new tpa6140a2_controls[] = {
289 SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
290 TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
291 tpa6130a2_get_volsw, tpa6130a2_put_volsw,
296 * Enable or disable channel (left or right)
297 * The bit number for mute and amplifier are the same per channel:
298 * bit 6: Right channel
299 * bit 7: Left channel
302 static void tpa6130a2_channel_enable(u8 channel, int enable)
308 /* Enable amplifier */
309 val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
311 val &= ~TPA6130A2_SWS;
312 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
315 val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
317 tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
319 /* Disable channel */
321 val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
323 tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
325 /* Disable amplifier */
326 val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
328 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
332 int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable)
336 ret = tpa6130a2_power(1);
339 tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L,
342 tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L,
344 ret = tpa6130a2_power(0);
349 EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable);
351 int tpa6130a2_add_controls(struct snd_soc_codec *codec)
353 struct tpa6130a2_data *data;
355 if (tpa6130a2_client == NULL)
358 data = i2c_get_clientdata(tpa6130a2_client);
360 if (data->id == TPA6140A2)
361 return snd_soc_add_codec_controls(codec, tpa6140a2_controls,
362 ARRAY_SIZE(tpa6140a2_controls));
364 return snd_soc_add_codec_controls(codec, tpa6130a2_controls,
365 ARRAY_SIZE(tpa6130a2_controls));
367 EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
369 static int tpa6130a2_probe(struct i2c_client *client,
370 const struct i2c_device_id *id)
373 struct tpa6130a2_data *data;
374 struct tpa6130a2_platform_data *pdata;
375 const char *regulator;
380 if (client->dev.platform_data == NULL) {
381 dev_err(dev, "Platform data not set\n");
386 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
388 dev_err(dev, "Can not allocate memory\n");
392 tpa6130a2_client = client;
394 i2c_set_clientdata(tpa6130a2_client, data);
396 pdata = client->dev.platform_data;
397 data->power_gpio = pdata->power_gpio;
398 data->id = id->driver_data;
400 mutex_init(&data->mutex);
402 /* Set default register values */
403 data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
404 data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R |
407 if (data->power_gpio >= 0) {
408 ret = devm_gpio_request(dev, data->power_gpio,
411 dev_err(dev, "Failed to request power GPIO (%d)\n",
415 gpio_direction_output(data->power_gpio, 0);
420 dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
430 data->supply = devm_regulator_get(dev, regulator);
431 if (IS_ERR(data->supply)) {
432 ret = PTR_ERR(data->supply);
433 dev_err(dev, "Failed to request supply: %d\n", ret);
437 ret = tpa6130a2_power(1);
443 ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
444 TPA6130A2_VERSION_MASK;
445 if ((ret != 1) && (ret != 2))
446 dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
448 /* Disable the chip */
449 ret = tpa6130a2_power(0);
456 tpa6130a2_client = NULL;
461 static int tpa6130a2_remove(struct i2c_client *client)
464 tpa6130a2_client = NULL;
469 static const struct i2c_device_id tpa6130a2_id[] = {
470 { "tpa6130a2", TPA6130A2 },
471 { "tpa6140a2", TPA6140A2 },
474 MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
476 static struct i2c_driver tpa6130a2_i2c_driver = {
479 .owner = THIS_MODULE,
481 .probe = tpa6130a2_probe,
482 .remove = tpa6130a2_remove,
483 .id_table = tpa6130a2_id,
486 module_i2c_driver(tpa6130a2_i2c_driver);
488 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
489 MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
490 MODULE_LICENSE("GPL");