2 * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver
4 * Copyright (C) Nokia Corporation
6 * Author: Peter Ujfalusi <peter.ujfalusi@nokia.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/soc-dapm.h>
33 #include <sound/tlv.h>
35 #include "tpa6130a2.h"
37 static struct i2c_client
*tpa6130a2_client
;
39 /* This struct is used to save the context */
40 struct tpa6130a2_data
{
42 unsigned char regs
[TPA6130A2_CACHEREGNUM
];
43 struct regulator
*supply
;
45 unsigned char power_state
;
49 static int tpa6130a2_i2c_read(int reg
)
51 struct tpa6130a2_data
*data
;
54 BUG_ON(tpa6130a2_client
== NULL
);
55 data
= i2c_get_clientdata(tpa6130a2_client
);
57 /* If powered off, return the cached value */
58 if (data
->power_state
) {
59 val
= i2c_smbus_read_byte_data(tpa6130a2_client
, reg
);
61 dev_err(&tpa6130a2_client
->dev
, "Read failed\n");
63 data
->regs
[reg
] = val
;
65 val
= data
->regs
[reg
];
71 static int tpa6130a2_i2c_write(int reg
, u8 value
)
73 struct tpa6130a2_data
*data
;
76 BUG_ON(tpa6130a2_client
== NULL
);
77 data
= i2c_get_clientdata(tpa6130a2_client
);
79 if (data
->power_state
) {
80 val
= i2c_smbus_write_byte_data(tpa6130a2_client
, reg
, value
);
82 dev_err(&tpa6130a2_client
->dev
, "Write failed\n");
85 /* Either powered on or off, we save the context */
86 data
->regs
[reg
] = value
;
91 static u8
tpa6130a2_read(int reg
)
93 struct tpa6130a2_data
*data
;
95 BUG_ON(tpa6130a2_client
== NULL
);
96 data
= i2c_get_clientdata(tpa6130a2_client
);
98 return data
->regs
[reg
];
101 static int tpa6130a2_initialize(void)
103 struct tpa6130a2_data
*data
;
106 BUG_ON(tpa6130a2_client
== NULL
);
107 data
= i2c_get_clientdata(tpa6130a2_client
);
109 for (i
= 1; i
< TPA6130A2_REG_VERSION
; i
++) {
110 ret
= tpa6130a2_i2c_write(i
, data
->regs
[i
]);
118 static int tpa6130a2_power(int power
)
120 struct tpa6130a2_data
*data
;
124 BUG_ON(tpa6130a2_client
== NULL
);
125 data
= i2c_get_clientdata(tpa6130a2_client
);
127 mutex_lock(&data
->mutex
);
128 if (power
&& !data
->power_state
) {
130 if (data
->power_gpio
>= 0)
131 gpio_set_value(data
->power_gpio
, 1);
133 ret
= regulator_enable(data
->supply
);
135 dev_err(&tpa6130a2_client
->dev
,
136 "Failed to enable supply: %d\n", ret
);
140 data
->power_state
= 1;
141 ret
= tpa6130a2_initialize();
143 dev_err(&tpa6130a2_client
->dev
,
144 "Failed to initialize chip\n");
145 if (data
->power_gpio
>= 0)
146 gpio_set_value(data
->power_gpio
, 0);
147 regulator_disable(data
->supply
);
148 data
->power_state
= 0;
153 val
= tpa6130a2_read(TPA6130A2_REG_CONTROL
);
154 val
&= ~TPA6130A2_SWS
;
155 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL
, val
);
156 } else if (!power
&& data
->power_state
) {
158 val
= tpa6130a2_read(TPA6130A2_REG_CONTROL
);
159 val
|= TPA6130A2_SWS
;
160 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL
, val
);
163 if (data
->power_gpio
>= 0)
164 gpio_set_value(data
->power_gpio
, 0);
166 ret
= regulator_disable(data
->supply
);
168 dev_err(&tpa6130a2_client
->dev
,
169 "Failed to disable supply: %d\n", ret
);
173 data
->power_state
= 0;
177 mutex_unlock(&data
->mutex
);
181 static int tpa6130a2_get_volsw(struct snd_kcontrol
*kcontrol
,
182 struct snd_ctl_elem_value
*ucontrol
)
184 struct soc_mixer_control
*mc
=
185 (struct soc_mixer_control
*)kcontrol
->private_value
;
186 struct tpa6130a2_data
*data
;
187 unsigned int reg
= mc
->reg
;
188 unsigned int shift
= mc
->shift
;
190 unsigned int mask
= (1 << fls(max
)) - 1;
191 unsigned int invert
= mc
->invert
;
193 BUG_ON(tpa6130a2_client
== NULL
);
194 data
= i2c_get_clientdata(tpa6130a2_client
);
196 mutex_lock(&data
->mutex
);
198 ucontrol
->value
.integer
.value
[0] =
199 (tpa6130a2_read(reg
) >> shift
) & mask
;
202 ucontrol
->value
.integer
.value
[0] =
203 max
- ucontrol
->value
.integer
.value
[0];
205 mutex_unlock(&data
->mutex
);
209 static int tpa6130a2_put_volsw(struct snd_kcontrol
*kcontrol
,
210 struct snd_ctl_elem_value
*ucontrol
)
212 struct soc_mixer_control
*mc
=
213 (struct soc_mixer_control
*)kcontrol
->private_value
;
214 struct tpa6130a2_data
*data
;
215 unsigned int reg
= mc
->reg
;
216 unsigned int shift
= mc
->shift
;
218 unsigned int mask
= (1 << fls(max
)) - 1;
219 unsigned int invert
= mc
->invert
;
220 unsigned int val
= (ucontrol
->value
.integer
.value
[0] & mask
);
221 unsigned int val_reg
;
223 BUG_ON(tpa6130a2_client
== NULL
);
224 data
= i2c_get_clientdata(tpa6130a2_client
);
229 mutex_lock(&data
->mutex
);
231 val_reg
= tpa6130a2_read(reg
);
232 if (((val_reg
>> shift
) & mask
) == val
) {
233 mutex_unlock(&data
->mutex
);
237 val_reg
&= ~(mask
<< shift
);
238 val_reg
|= val
<< shift
;
239 tpa6130a2_i2c_write(reg
, val_reg
);
241 mutex_unlock(&data
->mutex
);
247 * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
250 static const unsigned int tpa6130_tlv
[] = {
251 TLV_DB_RANGE_HEAD(10),
252 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
253 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
254 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
255 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
256 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
257 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
258 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
259 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
260 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
261 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
264 static const struct snd_kcontrol_new tpa6130a2_controls
[] = {
265 SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
266 TPA6130A2_REG_VOL_MUTE
, 0, 0x3f, 0,
267 tpa6130a2_get_volsw
, tpa6130a2_put_volsw
,
271 static const unsigned int tpa6140_tlv
[] = {
272 TLV_DB_RANGE_HEAD(3),
273 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
274 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
275 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
278 static const struct snd_kcontrol_new tpa6140a2_controls
[] = {
279 SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
280 TPA6130A2_REG_VOL_MUTE
, 1, 0x1f, 0,
281 tpa6130a2_get_volsw
, tpa6130a2_put_volsw
,
286 * Enable or disable channel (left or right)
287 * The bit number for mute and amplifier are the same per channel:
288 * bit 6: Right channel
289 * bit 7: Left channel
292 static void tpa6130a2_channel_enable(u8 channel
, int enable
)
298 /* Enable amplifier */
299 val
= tpa6130a2_read(TPA6130A2_REG_CONTROL
);
301 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL
, val
);
304 val
= tpa6130a2_read(TPA6130A2_REG_VOL_MUTE
);
306 tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE
, val
);
308 /* Disable channel */
310 val
= tpa6130a2_read(TPA6130A2_REG_VOL_MUTE
);
312 tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE
, val
);
314 /* Disable amplifier */
315 val
= tpa6130a2_read(TPA6130A2_REG_CONTROL
);
317 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL
, val
);
321 static int tpa6130a2_left_event(struct snd_soc_dapm_widget
*w
,
322 struct snd_kcontrol
*kcontrol
, int event
)
325 case SND_SOC_DAPM_POST_PMU
:
326 tpa6130a2_channel_enable(TPA6130A2_HP_EN_L
, 1);
328 case SND_SOC_DAPM_POST_PMD
:
329 tpa6130a2_channel_enable(TPA6130A2_HP_EN_L
, 0);
335 static int tpa6130a2_right_event(struct snd_soc_dapm_widget
*w
,
336 struct snd_kcontrol
*kcontrol
, int event
)
339 case SND_SOC_DAPM_POST_PMU
:
340 tpa6130a2_channel_enable(TPA6130A2_HP_EN_R
, 1);
342 case SND_SOC_DAPM_POST_PMD
:
343 tpa6130a2_channel_enable(TPA6130A2_HP_EN_R
, 0);
349 static int tpa6130a2_supply_event(struct snd_soc_dapm_widget
*w
,
350 struct snd_kcontrol
*kcontrol
, int event
)
355 case SND_SOC_DAPM_POST_PMU
:
356 ret
= tpa6130a2_power(1);
358 case SND_SOC_DAPM_POST_PMD
:
359 ret
= tpa6130a2_power(0);
365 static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets
[] = {
366 SND_SOC_DAPM_PGA_E("TPA6130A2 Left", SND_SOC_NOPM
,
367 0, 0, NULL
, 0, tpa6130a2_left_event
,
368 SND_SOC_DAPM_POST_PMU
|SND_SOC_DAPM_POST_PMD
),
369 SND_SOC_DAPM_PGA_E("TPA6130A2 Right", SND_SOC_NOPM
,
370 0, 0, NULL
, 0, tpa6130a2_right_event
,
371 SND_SOC_DAPM_POST_PMU
|SND_SOC_DAPM_POST_PMD
),
372 SND_SOC_DAPM_SUPPLY("TPA6130A2 Enable", SND_SOC_NOPM
,
373 0, 0, tpa6130a2_supply_event
,
374 SND_SOC_DAPM_POST_PMU
|SND_SOC_DAPM_POST_PMD
),
376 SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Left"),
377 SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Right"),
380 static const struct snd_soc_dapm_route audio_map
[] = {
381 {"TPA6130A2 Headphone Left", NULL
, "TPA6130A2 Left"},
382 {"TPA6130A2 Headphone Right", NULL
, "TPA6130A2 Right"},
384 {"TPA6130A2 Headphone Left", NULL
, "TPA6130A2 Enable"},
385 {"TPA6130A2 Headphone Right", NULL
, "TPA6130A2 Enable"},
388 int tpa6130a2_add_controls(struct snd_soc_codec
*codec
)
390 struct tpa6130a2_data
*data
;
392 if (tpa6130a2_client
== NULL
)
395 data
= i2c_get_clientdata(tpa6130a2_client
);
397 snd_soc_dapm_new_controls(codec
, tpa6130a2_dapm_widgets
,
398 ARRAY_SIZE(tpa6130a2_dapm_widgets
));
400 snd_soc_dapm_add_routes(codec
, audio_map
, ARRAY_SIZE(audio_map
));
402 if (data
->id
== TPA6140A2
)
403 return snd_soc_add_controls(codec
, tpa6140a2_controls
,
404 ARRAY_SIZE(tpa6140a2_controls
));
406 return snd_soc_add_controls(codec
, tpa6130a2_controls
,
407 ARRAY_SIZE(tpa6130a2_controls
));
410 EXPORT_SYMBOL_GPL(tpa6130a2_add_controls
);
412 static int __devinit
tpa6130a2_probe(struct i2c_client
*client
,
413 const struct i2c_device_id
*id
)
416 struct tpa6130a2_data
*data
;
417 struct tpa6130a2_platform_data
*pdata
;
418 const char *regulator
;
423 if (client
->dev
.platform_data
== NULL
) {
424 dev_err(dev
, "Platform data not set\n");
429 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
431 dev_err(dev
, "Can not allocate memory\n");
435 tpa6130a2_client
= client
;
437 i2c_set_clientdata(tpa6130a2_client
, data
);
439 pdata
= client
->dev
.platform_data
;
440 data
->power_gpio
= pdata
->power_gpio
;
441 data
->id
= pdata
->id
;
443 mutex_init(&data
->mutex
);
445 /* Set default register values */
446 data
->regs
[TPA6130A2_REG_CONTROL
] = TPA6130A2_SWS
;
447 data
->regs
[TPA6130A2_REG_VOL_MUTE
] = TPA6130A2_MUTE_R
|
450 if (data
->power_gpio
>= 0) {
451 ret
= gpio_request(data
->power_gpio
, "tpa6130a2 enable");
453 dev_err(dev
, "Failed to request power GPIO (%d)\n",
457 gpio_direction_output(data
->power_gpio
, 0);
462 dev_warn(dev
, "Unknown TPA model (%d). Assuming 6130A2\n",
472 data
->supply
= regulator_get(dev
, regulator
);
473 if (IS_ERR(data
->supply
)) {
474 ret
= PTR_ERR(data
->supply
);
475 dev_err(dev
, "Failed to request supply: %d\n", ret
);
479 ret
= tpa6130a2_power(1);
485 ret
= tpa6130a2_i2c_read(TPA6130A2_REG_VERSION
) &
486 TPA6130A2_VERSION_MASK
;
487 if ((ret
!= 1) && (ret
!= 2))
488 dev_warn(dev
, "UNTESTED version detected (%d)\n", ret
);
490 /* Disable the chip */
491 ret
= tpa6130a2_power(0);
498 regulator_put(data
->supply
);
500 if (data
->power_gpio
>= 0)
501 gpio_free(data
->power_gpio
);
504 i2c_set_clientdata(tpa6130a2_client
, NULL
);
505 tpa6130a2_client
= NULL
;
510 static int __devexit
tpa6130a2_remove(struct i2c_client
*client
)
512 struct tpa6130a2_data
*data
= i2c_get_clientdata(client
);
516 if (data
->power_gpio
>= 0)
517 gpio_free(data
->power_gpio
);
519 regulator_put(data
->supply
);
522 tpa6130a2_client
= NULL
;
527 static const struct i2c_device_id tpa6130a2_id
[] = {
531 MODULE_DEVICE_TABLE(i2c
, tpa6130a2_id
);
533 static struct i2c_driver tpa6130a2_i2c_driver
= {
536 .owner
= THIS_MODULE
,
538 .probe
= tpa6130a2_probe
,
539 .remove
= __devexit_p(tpa6130a2_remove
),
540 .id_table
= tpa6130a2_id
,
543 static int __init
tpa6130a2_init(void)
545 return i2c_add_driver(&tpa6130a2_i2c_driver
);
548 static void __exit
tpa6130a2_exit(void)
550 i2c_del_driver(&tpa6130a2_i2c_driver
);
553 MODULE_AUTHOR("Peter Ujfalusi");
554 MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
555 MODULE_LICENSE("GPL");
557 module_init(tpa6130a2_init
);
558 module_exit(tpa6130a2_exit
);