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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>
33
34#include "tpa6130a2.h"
35
36enum tpa_model {
37 TPA6130A2,
38 TPA6140A2,
39};
40
41static struct i2c_client *tpa6130a2_client;
42
43
44struct tpa6130a2_data {
45 struct mutex mutex;
46 unsigned char regs[TPA6130A2_CACHEREGNUM];
47 struct regulator *supply;
48 int power_gpio;
49 u8 power_state:1;
50 enum tpa_model id;
51};
52
53static 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
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
75static 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);
85 if (val < 0) {
86 dev_err(&tpa6130a2_client->dev, "Write failed\n");
87 return val;
88 }
89 }
90
91
92 data->regs[reg] = value;
93
94 return val;
95}
96
97static 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
107static int tpa6130a2_initialize(void)
108{
109 struct tpa6130a2_data *data;
110 int i, ret = 0;
111
112 BUG_ON(tpa6130a2_client == NULL);
113 data = i2c_get_clientdata(tpa6130a2_client);
114
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;
122}
123
124static int tpa6130a2_power(u8 power)
125{
126 struct tpa6130a2_data *data;
127 u8 val;
128 int ret = 0;
129
130 BUG_ON(tpa6130a2_client == NULL);
131 data = i2c_get_clientdata(tpa6130a2_client);
132
133 mutex_lock(&data->mutex);
134 if (power == data->power_state)
135 goto exit;
136
137 if (power) {
138 ret = regulator_enable(data->supply);
139 if (ret != 0) {
140 dev_err(&tpa6130a2_client->dev,
141 "Failed to enable supply: %d\n", ret);
142 goto exit;
143 }
144
145 if (data->power_gpio >= 0)
146 gpio_set_value(data->power_gpio, 1);
147
148 data->power_state = 1;
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 }
159 } else {
160
161 val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
162 val |= TPA6130A2_SWS;
163 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
164
165
166 if (data->power_gpio >= 0)
167 gpio_set_value(data->power_gpio, 0);
168
169 ret = regulator_disable(data->supply);
170 if (ret != 0) {
171 dev_err(&tpa6130a2_client->dev,
172 "Failed to disable supply: %d\n", ret);
173 goto exit;
174 }
175
176 data->power_state = 0;
177 }
178
179exit:
180 mutex_unlock(&data->mutex);
181 return ret;
182}
183
184static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
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;
192 int max = mc->max;
193 unsigned int mask = (1 << fls(max)) - 1;
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] =
206 max - ucontrol->value.integer.value[0];
207
208 mutex_unlock(&data->mutex);
209 return 0;
210}
211
212static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol,
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;
220 int max = mc->max;
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;
225
226 BUG_ON(tpa6130a2_client == NULL);
227 data = i2c_get_clientdata(tpa6130a2_client);
228
229 if (invert)
230 val = max - val;
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
251
252
253static 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
267static 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,
271 tpa6130_tlv),
272};
273
274static 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
281static 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,
285 tpa6140_tlv),
286};
287
288
289
290
291
292
293
294
295static void tpa6130a2_channel_enable(u8 channel, int enable)
296{
297 u8 val;
298
299 if (enable) {
300
301
302 val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
303 val |= channel;
304 val &= ~TPA6130A2_SWS;
305 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
306
307
308 val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
309 val &= ~channel;
310 tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
311 } else {
312
313
314 val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
315 val |= channel;
316 tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
317
318
319 val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
320 val &= ~channel;
321 tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
322 }
323}
324
325int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable)
326{
327 int ret = 0;
328 if (enable) {
329 ret = tpa6130a2_power(1);
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);
337 ret = tpa6130a2_power(0);
338 }
339
340 return ret;
341}
342EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable);
343
344int tpa6130a2_add_controls(struct snd_soc_codec *codec)
345{
346 struct tpa6130a2_data *data;
347
348 if (tpa6130a2_client == NULL)
349 return -ENODEV;
350
351 data = i2c_get_clientdata(tpa6130a2_client);
352
353 if (data->id == TPA6140A2)
354 return snd_soc_add_codec_controls(codec, tpa6140a2_controls,
355 ARRAY_SIZE(tpa6140a2_controls));
356 else
357 return snd_soc_add_codec_controls(codec, tpa6130a2_controls,
358 ARRAY_SIZE(tpa6130a2_controls));
359}
360EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
361
362static int tpa6130a2_probe(struct i2c_client *client,
363 const struct i2c_device_id *id)
364{
365 struct device *dev;
366 struct tpa6130a2_data *data;
367 struct tpa6130a2_platform_data *pdata;
368 const char *regulator;
369 int ret;
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
379 data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
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
389 pdata = client->dev.platform_data;
390 data->power_gpio = pdata->power_gpio;
391 data->id = id->driver_data;
392
393 mutex_init(&data->mutex);
394
395
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 = devm_gpio_request(dev, data->power_gpio,
402 "tpa6130a2 enable");
403 if (ret < 0) {
404 dev_err(dev, "Failed to request power GPIO (%d)\n",
405 data->power_gpio);
406 goto err_gpio;
407 }
408 gpio_direction_output(data->power_gpio, 0);
409 }
410
411 switch (data->id) {
412 default:
413 dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
414 data->id);
415 case TPA6130A2:
416 regulator = "Vdd";
417 break;
418 case TPA6140A2:
419 regulator = "AVdd";
420 break;
421 }
422
423 data->supply = devm_regulator_get(dev, regulator);
424 if (IS_ERR(data->supply)) {
425 ret = PTR_ERR(data->supply);
426 dev_err(dev, "Failed to request supply: %d\n", ret);
427 goto err_gpio;
428 }
429
430 ret = tpa6130a2_power(1);
431 if (ret != 0)
432 goto err_gpio;
433
434
435
436 ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
437 TPA6130A2_VERSION_MASK;
438 if ((ret != 1) && (ret != 2))
439 dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
440
441
442 ret = tpa6130a2_power(0);
443 if (ret != 0)
444 goto err_gpio;
445
446 return 0;
447
448err_gpio:
449 tpa6130a2_client = NULL;
450
451 return ret;
452}
453
454static int tpa6130a2_remove(struct i2c_client *client)
455{
456 tpa6130a2_power(0);
457 tpa6130a2_client = NULL;
458
459 return 0;
460}
461
462static const struct i2c_device_id tpa6130a2_id[] = {
463 { "tpa6130a2", TPA6130A2 },
464 { "tpa6140a2", TPA6140A2 },
465 { }
466};
467MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
468
469static struct i2c_driver tpa6130a2_i2c_driver = {
470 .driver = {
471 .name = "tpa6130a2",
472 .owner = THIS_MODULE,
473 },
474 .probe = tpa6130a2_probe,
475 .remove = tpa6130a2_remove,
476 .id_table = tpa6130a2_id,
477};
478
479module_i2c_driver(tpa6130a2_i2c_driver);
480
481MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
482MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
483MODULE_LICENSE("GPL");
484
