Commit | Line | Data |
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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 | 32 | #include <sound/tlv.h> |
f95a4883 | 33 | #include <linux/of_gpio.h> |
493b67ef PU |
34 | |
35 | #include "tpa6130a2.h" | |
36 | ||
0722d055 PU |
37 | enum tpa_model { |
38 | TPA6130A2, | |
39 | TPA6140A2, | |
40 | }; | |
41 | ||
ebab1b1d | 42 | static struct i2c_client *tpa6130a2_client; |
493b67ef PU |
43 | |
44 | /* This struct is used to save the context */ | |
45 | struct tpa6130a2_data { | |
46 | struct mutex mutex; | |
47 | unsigned char regs[TPA6130A2_CACHEREGNUM]; | |
ad8332c1 | 48 | struct regulator *supply; |
493b67ef | 49 | int power_gpio; |
d5876ce1 | 50 | u8 power_state:1; |
e5e5b31e | 51 | enum tpa_model id; |
493b67ef PU |
52 | }; |
53 | ||
54 | static int tpa6130a2_i2c_read(int reg) | |
55 | { | |
56 | struct tpa6130a2_data *data; | |
57 | int val; | |
58 | ||
773392b2 TI |
59 | if (WARN_ON(!tpa6130a2_client)) |
60 | return -EINVAL; | |
493b67ef PU |
61 | data = i2c_get_clientdata(tpa6130a2_client); |
62 | ||
63 | /* If powered off, return the cached value */ | |
64 | if (data->power_state) { | |
65 | val = i2c_smbus_read_byte_data(tpa6130a2_client, reg); | |
66 | if (val < 0) | |
67 | dev_err(&tpa6130a2_client->dev, "Read failed\n"); | |
68 | else | |
69 | data->regs[reg] = val; | |
70 | } else { | |
71 | val = data->regs[reg]; | |
72 | } | |
73 | ||
74 | return val; | |
75 | } | |
76 | ||
77 | static int tpa6130a2_i2c_write(int reg, u8 value) | |
78 | { | |
79 | struct tpa6130a2_data *data; | |
80 | int val = 0; | |
81 | ||
773392b2 TI |
82 | if (WARN_ON(!tpa6130a2_client)) |
83 | return -EINVAL; | |
493b67ef PU |
84 | data = i2c_get_clientdata(tpa6130a2_client); |
85 | ||
86 | if (data->power_state) { | |
87 | val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value); | |
7a479b02 | 88 | if (val < 0) { |
493b67ef | 89 | dev_err(&tpa6130a2_client->dev, "Write failed\n"); |
7a479b02 AL |
90 | return val; |
91 | } | |
493b67ef PU |
92 | } |
93 | ||
94 | /* Either powered on or off, we save the context */ | |
95 | data->regs[reg] = value; | |
96 | ||
97 | return val; | |
98 | } | |
99 | ||
100 | static u8 tpa6130a2_read(int reg) | |
101 | { | |
102 | struct tpa6130a2_data *data; | |
103 | ||
773392b2 TI |
104 | if (WARN_ON(!tpa6130a2_client)) |
105 | return 0; | |
493b67ef PU |
106 | data = i2c_get_clientdata(tpa6130a2_client); |
107 | ||
108 | return data->regs[reg]; | |
109 | } | |
110 | ||
872a64d7 | 111 | static int tpa6130a2_initialize(void) |
493b67ef PU |
112 | { |
113 | struct tpa6130a2_data *data; | |
872a64d7 | 114 | int i, ret = 0; |
493b67ef | 115 | |
773392b2 TI |
116 | if (WARN_ON(!tpa6130a2_client)) |
117 | return -EINVAL; | |
493b67ef PU |
118 | data = i2c_get_clientdata(tpa6130a2_client); |
119 | ||
872a64d7 PU |
120 | for (i = 1; i < TPA6130A2_REG_VERSION; i++) { |
121 | ret = tpa6130a2_i2c_write(i, data->regs[i]); | |
122 | if (ret < 0) | |
123 | break; | |
124 | } | |
125 | ||
126 | return ret; | |
493b67ef PU |
127 | } |
128 | ||
d5876ce1 | 129 | static int tpa6130a2_power(u8 power) |
493b67ef PU |
130 | { |
131 | struct tpa6130a2_data *data; | |
132 | u8 val; | |
75e3f313 | 133 | int ret = 0; |
493b67ef | 134 | |
773392b2 TI |
135 | if (WARN_ON(!tpa6130a2_client)) |
136 | return -EINVAL; | |
493b67ef PU |
137 | data = i2c_get_clientdata(tpa6130a2_client); |
138 | ||
139 | mutex_lock(&data->mutex); | |
d5876ce1 PU |
140 | if (power == data->power_state) |
141 | goto exit; | |
7c4e6492 | 142 | |
d5876ce1 | 143 | if (power) { |
ad8332c1 | 144 | ret = regulator_enable(data->supply); |
7c4e6492 IK |
145 | if (ret != 0) { |
146 | dev_err(&tpa6130a2_client->dev, | |
ad8332c1 | 147 | "Failed to enable supply: %d\n", ret); |
7c4e6492 | 148 | goto exit; |
493b67ef | 149 | } |
0656f6cf JN |
150 | /* Power on */ |
151 | if (data->power_gpio >= 0) | |
152 | gpio_set_value(data->power_gpio, 1); | |
7c4e6492 IK |
153 | |
154 | data->power_state = 1; | |
872a64d7 PU |
155 | ret = tpa6130a2_initialize(); |
156 | if (ret < 0) { | |
157 | dev_err(&tpa6130a2_client->dev, | |
158 | "Failed to initialize chip\n"); | |
159 | if (data->power_gpio >= 0) | |
160 | gpio_set_value(data->power_gpio, 0); | |
161 | regulator_disable(data->supply); | |
162 | data->power_state = 0; | |
163 | goto exit; | |
164 | } | |
d5876ce1 | 165 | } else { |
493b67ef PU |
166 | /* set SWS */ |
167 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
168 | val |= TPA6130A2_SWS; | |
169 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); | |
7c4e6492 | 170 | |
493b67ef | 171 | /* Power off */ |
7c4e6492 | 172 | if (data->power_gpio >= 0) |
493b67ef | 173 | gpio_set_value(data->power_gpio, 0); |
7c4e6492 | 174 | |
ad8332c1 | 175 | ret = regulator_disable(data->supply); |
7c4e6492 IK |
176 | if (ret != 0) { |
177 | dev_err(&tpa6130a2_client->dev, | |
ad8332c1 | 178 | "Failed to disable supply: %d\n", ret); |
7c4e6492 | 179 | goto exit; |
493b67ef | 180 | } |
7c4e6492 IK |
181 | |
182 | data->power_state = 0; | |
493b67ef | 183 | } |
7c4e6492 IK |
184 | |
185 | exit: | |
493b67ef | 186 | mutex_unlock(&data->mutex); |
7c4e6492 | 187 | return ret; |
493b67ef PU |
188 | } |
189 | ||
bd843edf | 190 | static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol, |
493b67ef PU |
191 | struct snd_ctl_elem_value *ucontrol) |
192 | { | |
193 | struct soc_mixer_control *mc = | |
194 | (struct soc_mixer_control *)kcontrol->private_value; | |
195 | struct tpa6130a2_data *data; | |
196 | unsigned int reg = mc->reg; | |
197 | unsigned int shift = mc->shift; | |
bd843edf PU |
198 | int max = mc->max; |
199 | unsigned int mask = (1 << fls(max)) - 1; | |
493b67ef PU |
200 | unsigned int invert = mc->invert; |
201 | ||
773392b2 TI |
202 | if (WARN_ON(!tpa6130a2_client)) |
203 | return -EINVAL; | |
493b67ef PU |
204 | data = i2c_get_clientdata(tpa6130a2_client); |
205 | ||
206 | mutex_lock(&data->mutex); | |
207 | ||
208 | ucontrol->value.integer.value[0] = | |
209 | (tpa6130a2_read(reg) >> shift) & mask; | |
210 | ||
211 | if (invert) | |
212 | ucontrol->value.integer.value[0] = | |
bd843edf | 213 | max - ucontrol->value.integer.value[0]; |
493b67ef PU |
214 | |
215 | mutex_unlock(&data->mutex); | |
216 | return 0; | |
217 | } | |
218 | ||
bd843edf | 219 | static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol, |
493b67ef PU |
220 | struct snd_ctl_elem_value *ucontrol) |
221 | { | |
222 | struct soc_mixer_control *mc = | |
223 | (struct soc_mixer_control *)kcontrol->private_value; | |
224 | struct tpa6130a2_data *data; | |
225 | unsigned int reg = mc->reg; | |
226 | unsigned int shift = mc->shift; | |
bd843edf PU |
227 | int max = mc->max; |
228 | unsigned int mask = (1 << fls(max)) - 1; | |
493b67ef PU |
229 | unsigned int invert = mc->invert; |
230 | unsigned int val = (ucontrol->value.integer.value[0] & mask); | |
231 | unsigned int val_reg; | |
232 | ||
773392b2 TI |
233 | if (WARN_ON(!tpa6130a2_client)) |
234 | return -EINVAL; | |
493b67ef PU |
235 | data = i2c_get_clientdata(tpa6130a2_client); |
236 | ||
237 | if (invert) | |
bd843edf | 238 | val = max - val; |
493b67ef PU |
239 | |
240 | mutex_lock(&data->mutex); | |
241 | ||
242 | val_reg = tpa6130a2_read(reg); | |
243 | if (((val_reg >> shift) & mask) == val) { | |
244 | mutex_unlock(&data->mutex); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | val_reg &= ~(mask << shift); | |
249 | val_reg |= val << shift; | |
250 | tpa6130a2_i2c_write(reg, val_reg); | |
251 | ||
252 | mutex_unlock(&data->mutex); | |
253 | ||
254 | return 1; | |
255 | } | |
256 | ||
257 | /* | |
258 | * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going | |
259 | * down in gain. | |
260 | */ | |
261 | static const unsigned int tpa6130_tlv[] = { | |
262 | TLV_DB_RANGE_HEAD(10), | |
263 | 0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0), | |
264 | 2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0), | |
265 | 4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0), | |
266 | 6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0), | |
267 | 8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0), | |
268 | 10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0), | |
269 | 12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0), | |
270 | 14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0), | |
271 | 21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0), | |
272 | 38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0), | |
273 | }; | |
274 | ||
275 | static const struct snd_kcontrol_new tpa6130a2_controls[] = { | |
276 | SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume", | |
277 | TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0, | |
bd843edf | 278 | tpa6130a2_get_volsw, tpa6130a2_put_volsw, |
493b67ef PU |
279 | tpa6130_tlv), |
280 | }; | |
281 | ||
e5e5b31e PU |
282 | static const unsigned int tpa6140_tlv[] = { |
283 | TLV_DB_RANGE_HEAD(3), | |
284 | 0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0), | |
285 | 9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0), | |
286 | 17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0), | |
287 | }; | |
288 | ||
289 | static const struct snd_kcontrol_new tpa6140a2_controls[] = { | |
826e962c PU |
290 | SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume", |
291 | TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0, | |
bd843edf | 292 | tpa6130a2_get_volsw, tpa6130a2_put_volsw, |
826e962c | 293 | tpa6140_tlv), |
e5e5b31e PU |
294 | }; |
295 | ||
493b67ef PU |
296 | /* |
297 | * Enable or disable channel (left or right) | |
298 | * The bit number for mute and amplifier are the same per channel: | |
299 | * bit 6: Right channel | |
300 | * bit 7: Left channel | |
301 | * in both registers. | |
302 | */ | |
303 | static void tpa6130a2_channel_enable(u8 channel, int enable) | |
304 | { | |
493b67ef PU |
305 | u8 val; |
306 | ||
493b67ef PU |
307 | if (enable) { |
308 | /* Enable channel */ | |
309 | /* Enable amplifier */ | |
310 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
311 | val |= channel; | |
d534bacd | 312 | val &= ~TPA6130A2_SWS; |
493b67ef PU |
313 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); |
314 | ||
315 | /* Unmute channel */ | |
316 | val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); | |
317 | val &= ~channel; | |
318 | tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); | |
319 | } else { | |
320 | /* Disable channel */ | |
321 | /* Mute channel */ | |
322 | val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE); | |
323 | val |= channel; | |
324 | tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val); | |
325 | ||
326 | /* Disable amplifier */ | |
327 | val = tpa6130a2_read(TPA6130A2_REG_CONTROL); | |
328 | val &= ~channel; | |
329 | tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val); | |
330 | } | |
331 | } | |
332 | ||
39646871 | 333 | int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable) |
493b67ef | 334 | { |
7c4e6492 | 335 | int ret = 0; |
39646871 | 336 | if (enable) { |
7c4e6492 | 337 | ret = tpa6130a2_power(1); |
39646871 PU |
338 | if (ret < 0) |
339 | return ret; | |
340 | tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L, | |
341 | 1); | |
342 | } else { | |
343 | tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L, | |
344 | 0); | |
7c4e6492 | 345 | ret = tpa6130a2_power(0); |
493b67ef | 346 | } |
39646871 | 347 | |
7c4e6492 | 348 | return ret; |
493b67ef | 349 | } |
39646871 | 350 | EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable); |
493b67ef PU |
351 | |
352 | int tpa6130a2_add_controls(struct snd_soc_codec *codec) | |
353 | { | |
e5e5b31e PU |
354 | struct tpa6130a2_data *data; |
355 | ||
872a64d7 PU |
356 | if (tpa6130a2_client == NULL) |
357 | return -ENODEV; | |
358 | ||
e5e5b31e PU |
359 | data = i2c_get_clientdata(tpa6130a2_client); |
360 | ||
e5e5b31e | 361 | if (data->id == TPA6140A2) |
022658be | 362 | return snd_soc_add_codec_controls(codec, tpa6140a2_controls, |
e5e5b31e PU |
363 | ARRAY_SIZE(tpa6140a2_controls)); |
364 | else | |
022658be | 365 | return snd_soc_add_codec_controls(codec, tpa6130a2_controls, |
e5e5b31e | 366 | ARRAY_SIZE(tpa6130a2_controls)); |
493b67ef PU |
367 | } |
368 | EXPORT_SYMBOL_GPL(tpa6130a2_add_controls); | |
369 | ||
7a79e94e BP |
370 | static int tpa6130a2_probe(struct i2c_client *client, |
371 | const struct i2c_device_id *id) | |
493b67ef PU |
372 | { |
373 | struct device *dev; | |
374 | struct tpa6130a2_data *data; | |
f95a4883 SR |
375 | struct tpa6130a2_platform_data *pdata = client->dev.platform_data; |
376 | struct device_node *np = client->dev.of_node; | |
ad8332c1 JN |
377 | const char *regulator; |
378 | int ret; | |
493b67ef PU |
379 | |
380 | dev = &client->dev; | |
381 | ||
6945e9f9 | 382 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
493b67ef PU |
383 | if (data == NULL) { |
384 | dev_err(dev, "Can not allocate memory\n"); | |
385 | return -ENOMEM; | |
386 | } | |
387 | ||
f95a4883 SR |
388 | if (pdata) { |
389 | data->power_gpio = pdata->power_gpio; | |
390 | } else if (np) { | |
391 | data->power_gpio = of_get_named_gpio(np, "power-gpio", 0); | |
392 | } else { | |
393 | dev_err(dev, "Platform data not set\n"); | |
394 | dump_stack(); | |
395 | return -ENODEV; | |
396 | } | |
397 | ||
493b67ef PU |
398 | tpa6130a2_client = client; |
399 | ||
400 | i2c_set_clientdata(tpa6130a2_client, data); | |
401 | ||
07441006 | 402 | data->id = id->driver_data; |
493b67ef PU |
403 | |
404 | mutex_init(&data->mutex); | |
405 | ||
406 | /* Set default register values */ | |
407 | data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS; | |
408 | data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R | | |
409 | TPA6130A2_MUTE_L; | |
410 | ||
411 | if (data->power_gpio >= 0) { | |
d06080cf SK |
412 | ret = devm_gpio_request(dev, data->power_gpio, |
413 | "tpa6130a2 enable"); | |
493b67ef PU |
414 | if (ret < 0) { |
415 | dev_err(dev, "Failed to request power GPIO (%d)\n", | |
416 | data->power_gpio); | |
7c4e6492 | 417 | goto err_gpio; |
493b67ef PU |
418 | } |
419 | gpio_direction_output(data->power_gpio, 0); | |
493b67ef PU |
420 | } |
421 | ||
e5e5b31e | 422 | switch (data->id) { |
ad8332c1 JN |
423 | default: |
424 | dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n", | |
07441006 | 425 | data->id); |
2138301e | 426 | case TPA6130A2: |
ad8332c1 | 427 | regulator = "Vdd"; |
2138301e IK |
428 | break; |
429 | case TPA6140A2: | |
ad8332c1 | 430 | regulator = "AVdd"; |
2138301e | 431 | break; |
2138301e | 432 | } |
7c4e6492 | 433 | |
d06080cf | 434 | data->supply = devm_regulator_get(dev, regulator); |
ad8332c1 JN |
435 | if (IS_ERR(data->supply)) { |
436 | ret = PTR_ERR(data->supply); | |
437 | dev_err(dev, "Failed to request supply: %d\n", ret); | |
d06080cf | 438 | goto err_gpio; |
7c4e6492 IK |
439 | } |
440 | ||
441 | ret = tpa6130a2_power(1); | |
442 | if (ret != 0) | |
d06080cf | 443 | goto err_gpio; |
7c4e6492 | 444 | |
493b67ef PU |
445 | |
446 | /* Read version */ | |
447 | ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) & | |
448 | TPA6130A2_VERSION_MASK; | |
449 | if ((ret != 1) && (ret != 2)) | |
450 | dev_warn(dev, "UNTESTED version detected (%d)\n", ret); | |
451 | ||
452 | /* Disable the chip */ | |
7c4e6492 IK |
453 | ret = tpa6130a2_power(0); |
454 | if (ret != 0) | |
d06080cf | 455 | goto err_gpio; |
493b67ef PU |
456 | |
457 | return 0; | |
7c4e6492 | 458 | |
7c4e6492 | 459 | err_gpio: |
ebab1b1d | 460 | tpa6130a2_client = NULL; |
493b67ef PU |
461 | |
462 | return ret; | |
463 | } | |
464 | ||
7a79e94e | 465 | static int tpa6130a2_remove(struct i2c_client *client) |
493b67ef | 466 | { |
493b67ef | 467 | tpa6130a2_power(0); |
ebab1b1d | 468 | tpa6130a2_client = NULL; |
493b67ef PU |
469 | |
470 | return 0; | |
471 | } | |
472 | ||
473 | static const struct i2c_device_id tpa6130a2_id[] = { | |
07441006 PU |
474 | { "tpa6130a2", TPA6130A2 }, |
475 | { "tpa6140a2", TPA6140A2 }, | |
493b67ef PU |
476 | { } |
477 | }; | |
478 | MODULE_DEVICE_TABLE(i2c, tpa6130a2_id); | |
479 | ||
f95a4883 SR |
480 | #if IS_ENABLED(CONFIG_OF) |
481 | static const struct of_device_id tpa6130a2_of_match[] = { | |
482 | { .compatible = "ti,tpa6130a2", }, | |
483 | { .compatible = "ti,tpa6140a2" }, | |
484 | {}, | |
485 | }; | |
486 | MODULE_DEVICE_TABLE(of, tpa6130a2_of_match); | |
487 | #endif | |
488 | ||
493b67ef PU |
489 | static struct i2c_driver tpa6130a2_i2c_driver = { |
490 | .driver = { | |
491 | .name = "tpa6130a2", | |
492 | .owner = THIS_MODULE, | |
f95a4883 | 493 | .of_match_table = of_match_ptr(tpa6130a2_of_match), |
493b67ef PU |
494 | }, |
495 | .probe = tpa6130a2_probe, | |
7a79e94e | 496 | .remove = tpa6130a2_remove, |
493b67ef PU |
497 | .id_table = tpa6130a2_id, |
498 | }; | |
499 | ||
f062e2b6 | 500 | module_i2c_driver(tpa6130a2_i2c_driver); |
493b67ef | 501 | |
b4079ef4 | 502 | MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>"); |
493b67ef PU |
503 | MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver"); |
504 | MODULE_LICENSE("GPL"); |