Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * For the STS-Thompson TDA7432 audio processor chip | |
3 | * | |
4 | * Handles audio functions: volume, balance, tone, loudness | |
5 | * This driver will not complain if used with any | |
6 | * other i2c device with the same address. | |
7 | * | |
8 | * Muting and tone control by Jonathan Isom <jisom@ematic.com> | |
9 | * | |
10 | * Copyright (c) 2000 Eric Sandeen <eric_sandeen@bigfoot.com> | |
7a00d45c | 11 | * Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org> |
1da177e4 LT |
12 | * This code is placed under the terms of the GNU General Public License |
13 | * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu) | |
14 | * Which was based on tda8425.c by Greg Alexander (c) 1998 | |
15 | * | |
16 | * OPTIONS: | |
17 | * debug - set to 1 if you'd like to see debug messages | |
18 | * set to 2 if you'd like to be inundated with debug messages | |
19 | * | |
20 | * loudness - set between 0 and 15 for varying degrees of loudness effect | |
21 | * | |
22 | * maxvol - set maximium volume to +20db (1), default is 0db(0) | |
23 | * | |
24 | * | |
25 | * Revision: 0.7 - maxvol module parm to set maximium volume 0db or +20db | |
26 | * store if muted so we can return it | |
27 | * change balance only if flaged to | |
28 | * Revision: 0.6 - added tone controls | |
29 | * Revision: 0.5 - Fixed odd balance problem | |
30 | * Revision: 0.4 - added muting | |
31 | * Revision: 0.3 - Fixed silly reversed volume controls. :) | |
32 | * Revision: 0.2 - Cleaned up #defines | |
33 | * fixed volume control | |
34 | * Added I2C_DRIVERID_TDA7432 | |
35 | * added loudness insmod control | |
36 | * Revision: 0.1 - initial version | |
37 | */ | |
38 | ||
39 | #include <linux/module.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/kernel.h> | |
1da177e4 LT |
42 | #include <linux/string.h> |
43 | #include <linux/timer.h> | |
44 | #include <linux/delay.h> | |
45 | #include <linux/errno.h> | |
46 | #include <linux/slab.h> | |
47 | #include <linux/videodev.h> | |
48 | #include <linux/i2c.h> | |
1da177e4 | 49 | |
0680481c | 50 | #include <media/v4l2-common.h> |
fa3fcceb | 51 | #include <media/i2c-addr.h> |
1da177e4 LT |
52 | |
53 | #ifndef VIDEO_AUDIO_BALANCE | |
54 | # define VIDEO_AUDIO_BALANCE 32 | |
55 | #endif | |
56 | ||
57 | MODULE_AUTHOR("Eric Sandeen <eric_sandeen@bigfoot.com>"); | |
58 | MODULE_DESCRIPTION("bttv driver for the tda7432 audio processor chip"); | |
59 | MODULE_LICENSE("GPL"); | |
60 | ||
61 | static int maxvol; | |
62 | static int loudness; /* disable loudness by default */ | |
63 | static int debug; /* insmod parameter */ | |
64 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
65 | module_param(loudness, int, S_IRUGO); | |
66 | MODULE_PARM_DESC(maxvol,"Set maximium volume to +20db (0), default is 0db(1)"); | |
67 | module_param(maxvol, int, S_IRUGO | S_IWUSR); | |
68 | ||
69 | ||
70 | /* Address to scan (I2C address of this chip) */ | |
71 | static unsigned short normal_i2c[] = { | |
09df1c16 | 72 | I2C_ADDR_TDA7432 >> 1, |
1da177e4 LT |
73 | I2C_CLIENT_END, |
74 | }; | |
1da177e4 LT |
75 | I2C_CLIENT_INSMOD; |
76 | ||
77 | /* Structure of address and subaddresses for the tda7432 */ | |
78 | ||
79 | struct tda7432 { | |
80 | int addr; | |
81 | int input; | |
82 | int volume; | |
83 | int muted; | |
84 | int bass, treble; | |
85 | int lf, lr, rf, rr; | |
86 | int loud; | |
87 | struct i2c_client c; | |
88 | }; | |
89 | static struct i2c_driver driver; | |
90 | static struct i2c_client client_template; | |
91 | ||
1da177e4 LT |
92 | /* The TDA7432 is made by STS-Thompson |
93 | * http://www.st.com | |
94 | * http://us.st.com/stonline/books/pdf/docs/4056.pdf | |
95 | * | |
96 | * TDA7432: I2C-bus controlled basic audio processor | |
97 | * | |
98 | * The TDA7432 controls basic audio functions like volume, balance, | |
99 | * and tone control (including loudness). It also has four channel | |
100 | * output (for front and rear). Since most vidcap cards probably | |
101 | * don't have 4 channel output, this driver will set front & rear | |
102 | * together (no independent control). | |
103 | */ | |
104 | ||
105 | /* Subaddresses for TDA7432 */ | |
106 | ||
107 | #define TDA7432_IN 0x00 /* Input select */ | |
108 | #define TDA7432_VL 0x01 /* Volume */ | |
109 | #define TDA7432_TN 0x02 /* Bass, Treble (Tone) */ | |
110 | #define TDA7432_LF 0x03 /* Attenuation LF (Left Front) */ | |
111 | #define TDA7432_LR 0x04 /* Attenuation LR (Left Rear) */ | |
112 | #define TDA7432_RF 0x05 /* Attenuation RF (Right Front) */ | |
113 | #define TDA7432_RR 0x06 /* Attenuation RR (Right Rear) */ | |
114 | #define TDA7432_LD 0x07 /* Loudness */ | |
115 | ||
116 | ||
117 | /* Masks for bits in TDA7432 subaddresses */ | |
118 | ||
119 | /* Many of these not used - just for documentation */ | |
120 | ||
121 | /* Subaddress 0x00 - Input selection and bass control */ | |
122 | ||
123 | /* Bits 0,1,2 control input: | |
124 | * 0x00 - Stereo input | |
125 | * 0x02 - Mono input | |
126 | * 0x03 - Mute (Using Attenuators Plays better with modules) | |
127 | * Mono probably isn't used - I'm guessing only the stereo | |
128 | * input is connected on most cards, so we'll set it to stereo. | |
129 | * | |
130 | * Bit 3 controls bass cut: 0/1 is non-symmetric/symmetric bass cut | |
131 | * Bit 4 controls bass range: 0/1 is extended/standard bass range | |
132 | * | |
133 | * Highest 3 bits not used | |
134 | */ | |
135 | ||
136 | #define TDA7432_STEREO_IN 0 | |
137 | #define TDA7432_MONO_IN 2 /* Probably won't be used */ | |
138 | #define TDA7432_BASS_SYM 1 << 3 | |
139 | #define TDA7432_BASS_NORM 1 << 4 | |
140 | ||
141 | /* Subaddress 0x01 - Volume */ | |
142 | ||
143 | /* Lower 7 bits control volume from -79dB to +32dB in 1dB steps | |
144 | * Recommended maximum is +20 dB | |
145 | * | |
146 | * +32dB: 0x00 | |
147 | * +20dB: 0x0c | |
148 | * 0dB: 0x20 | |
149 | * -79dB: 0x6f | |
150 | * | |
151 | * MSB (bit 7) controls loudness: 1/0 is loudness on/off | |
152 | */ | |
153 | ||
154 | #define TDA7432_VOL_0DB 0x20 | |
155 | #define TDA7432_LD_ON 1 << 7 | |
156 | ||
157 | ||
158 | /* Subaddress 0x02 - Tone control */ | |
159 | ||
160 | /* Bits 0,1,2 control absolute treble gain from 0dB to 14dB | |
161 | * 0x0 is 14dB, 0x7 is 0dB | |
162 | * | |
163 | * Bit 3 controls treble attenuation/gain (sign) | |
164 | * 1 = gain (+) | |
165 | * 0 = attenuation (-) | |
166 | * | |
167 | * Bits 4,5,6 control absolute bass gain from 0dB to 14dB | |
168 | * (This is only true for normal base range, set in 0x00) | |
169 | * 0x0 << 4 is 14dB, 0x7 is 0dB | |
170 | * | |
171 | * Bit 7 controls bass attenuation/gain (sign) | |
172 | * 1 << 7 = gain (+) | |
173 | * 0 << 7 = attenuation (-) | |
174 | * | |
175 | * Example: | |
176 | * 1 1 0 1 0 1 0 1 is +4dB bass, -4dB treble | |
177 | */ | |
178 | ||
179 | #define TDA7432_TREBLE_0DB 0xf | |
180 | #define TDA7432_TREBLE 7 | |
181 | #define TDA7432_TREBLE_GAIN 1 << 3 | |
182 | #define TDA7432_BASS_0DB 0xf | |
183 | #define TDA7432_BASS 7 << 4 | |
184 | #define TDA7432_BASS_GAIN 1 << 7 | |
185 | ||
186 | ||
187 | /* Subaddress 0x03 - Left Front attenuation */ | |
188 | /* Subaddress 0x04 - Left Rear attenuation */ | |
189 | /* Subaddress 0x05 - Right Front attenuation */ | |
190 | /* Subaddress 0x06 - Right Rear attenuation */ | |
191 | ||
192 | /* Bits 0,1,2,3,4 control attenuation from 0dB to -37.5dB | |
193 | * in 1.5dB steps. | |
194 | * | |
195 | * 0x00 is 0dB | |
196 | * 0x1f is -37.5dB | |
197 | * | |
198 | * Bit 5 mutes that channel when set (1 = mute, 0 = unmute) | |
199 | * We'll use the mute on the input, though (above) | |
200 | * Bits 6,7 unused | |
201 | */ | |
202 | ||
203 | #define TDA7432_ATTEN_0DB 0x00 | |
204 | #define TDA7432_MUTE 0x1 << 5 | |
205 | ||
206 | ||
207 | /* Subaddress 0x07 - Loudness Control */ | |
208 | ||
209 | /* Bits 0,1,2,3 control loudness from 0dB to -15dB in 1dB steps | |
210 | * when bit 4 is NOT set | |
211 | * | |
212 | * 0x0 is 0dB | |
213 | * 0xf is -15dB | |
214 | * | |
215 | * If bit 4 is set, then there is a flat attenuation according to | |
216 | * the lower 4 bits, as above. | |
217 | * | |
218 | * Bits 5,6,7 unused | |
219 | */ | |
220 | ||
221 | ||
222 | ||
223 | /* Begin code */ | |
224 | ||
225 | static int tda7432_write(struct i2c_client *client, int subaddr, int val) | |
226 | { | |
227 | unsigned char buffer[2]; | |
f167cb4e MCC |
228 | v4l_dbg(2, debug,client,"In tda7432_write\n"); |
229 | v4l_dbg(1, debug,client,"Writing %d 0x%x\n", subaddr, val); | |
1da177e4 LT |
230 | buffer[0] = subaddr; |
231 | buffer[1] = val; | |
232 | if (2 != i2c_master_send(client,buffer,2)) { | |
0680481c | 233 | v4l_err(client,"I/O error, trying (write %d 0x%x)\n", |
1da177e4 LT |
234 | subaddr, val); |
235 | return -1; | |
236 | } | |
237 | return 0; | |
238 | } | |
239 | ||
240 | /* I don't think we ever actually _read_ the chip... */ | |
1da177e4 LT |
241 | |
242 | static int tda7432_set(struct i2c_client *client) | |
243 | { | |
244 | struct tda7432 *t = i2c_get_clientdata(client); | |
245 | unsigned char buf[16]; | |
f167cb4e | 246 | v4l_dbg(2, debug,client,"In tda7432_set\n"); |
1da177e4 | 247 | |
f167cb4e | 248 | v4l_dbg(1, debug,client, |
1da177e4 LT |
249 | "tda7432: 7432_set(0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x,0x%02x)\n", |
250 | t->input,t->volume,t->bass,t->treble,t->lf,t->lr,t->rf,t->rr,t->loud); | |
251 | buf[0] = TDA7432_IN; | |
252 | buf[1] = t->input; | |
253 | buf[2] = t->volume; | |
254 | buf[3] = t->bass; | |
255 | buf[4] = t->treble; | |
256 | buf[5] = t->lf; | |
257 | buf[6] = t->lr; | |
258 | buf[7] = t->rf; | |
259 | buf[8] = t->rr; | |
260 | buf[9] = t->loud; | |
261 | if (10 != i2c_master_send(client,buf,10)) { | |
0680481c | 262 | v4l_err(client,"I/O error, trying tda7432_set\n"); |
1da177e4 LT |
263 | return -1; |
264 | } | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | static void do_tda7432_init(struct i2c_client *client) | |
270 | { | |
271 | struct tda7432 *t = i2c_get_clientdata(client); | |
f167cb4e | 272 | v4l_dbg(2, debug,client,"In tda7432_init\n"); |
1da177e4 LT |
273 | |
274 | t->input = TDA7432_STEREO_IN | /* Main (stereo) input */ | |
275 | TDA7432_BASS_SYM | /* Symmetric bass cut */ | |
276 | TDA7432_BASS_NORM; /* Normal bass range */ | |
277 | t->volume = 0x3b ; /* -27dB Volume */ | |
278 | if (loudness) /* Turn loudness on? */ | |
279 | t->volume |= TDA7432_LD_ON; | |
7a00d45c | 280 | t->muted = 1; |
1da177e4 LT |
281 | t->treble = TDA7432_TREBLE_0DB; /* 0dB Treble */ |
282 | t->bass = TDA7432_BASS_0DB; /* 0dB Bass */ | |
283 | t->lf = TDA7432_ATTEN_0DB; /* 0dB attenuation */ | |
284 | t->lr = TDA7432_ATTEN_0DB; /* 0dB attenuation */ | |
285 | t->rf = TDA7432_ATTEN_0DB; /* 0dB attenuation */ | |
286 | t->rr = TDA7432_ATTEN_0DB; /* 0dB attenuation */ | |
287 | t->loud = loudness; /* insmod parameter */ | |
288 | ||
289 | tda7432_set(client); | |
290 | } | |
291 | ||
292 | /* *********************** * | |
293 | * i2c interface functions * | |
294 | * *********************** */ | |
295 | ||
296 | static int tda7432_attach(struct i2c_adapter *adap, int addr, int kind) | |
297 | { | |
298 | struct tda7432 *t; | |
299 | struct i2c_client *client; | |
1da177e4 | 300 | |
7408187d | 301 | t = kzalloc(sizeof *t,GFP_KERNEL); |
1da177e4 LT |
302 | if (!t) |
303 | return -ENOMEM; | |
1da177e4 LT |
304 | |
305 | client = &t->c; | |
4ac97914 MCC |
306 | memcpy(client,&client_template,sizeof(struct i2c_client)); |
307 | client->adapter = adap; | |
308 | client->addr = addr; | |
1da177e4 LT |
309 | i2c_set_clientdata(client, t); |
310 | ||
311 | do_tda7432_init(client); | |
1da177e4 | 312 | i2c_attach_client(client); |
0680481c MCC |
313 | |
314 | v4l_info(client, "chip found @ 0x%x (%s)\n", addr << 1, adap->name); | |
1da177e4 LT |
315 | return 0; |
316 | } | |
317 | ||
318 | static int tda7432_probe(struct i2c_adapter *adap) | |
319 | { | |
1da177e4 LT |
320 | if (adap->class & I2C_CLASS_TV_ANALOG) |
321 | return i2c_probe(adap, &addr_data, tda7432_attach); | |
1da177e4 LT |
322 | return 0; |
323 | } | |
324 | ||
325 | static int tda7432_detach(struct i2c_client *client) | |
326 | { | |
327 | struct tda7432 *t = i2c_get_clientdata(client); | |
328 | ||
329 | do_tda7432_init(client); | |
330 | i2c_detach_client(client); | |
331 | ||
332 | kfree(t); | |
333 | return 0; | |
334 | } | |
335 | ||
7a00d45c MCC |
336 | static int tda7432_get_ctrl(struct i2c_client *client, |
337 | struct v4l2_control *ctrl) | |
1da177e4 LT |
338 | { |
339 | struct tda7432 *t = i2c_get_clientdata(client); | |
1da177e4 | 340 | |
7a00d45c MCC |
341 | switch (ctrl->id) { |
342 | case V4L2_CID_AUDIO_MUTE: | |
343 | ctrl->value=t->muted; | |
344 | return 0; | |
345 | case V4L2_CID_AUDIO_VOLUME: | |
1da177e4 | 346 | if (!maxvol){ /* max +20db */ |
7a00d45c | 347 | ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 630; |
1da177e4 | 348 | } else { /* max 0db */ |
7a00d45c | 349 | ctrl->value = ( 0x6f - (t->volume & 0x7F) ) * 829; |
1da177e4 | 350 | } |
7a00d45c MCC |
351 | return 0; |
352 | case V4L2_CID_AUDIO_BALANCE: | |
353 | { | |
1da177e4 LT |
354 | if ( (t->lf) < (t->rf) ) |
355 | /* right is attenuated, balance shifted left */ | |
7a00d45c | 356 | ctrl->value = (32768 - 1057*(t->rf)); |
1da177e4 LT |
357 | else |
358 | /* left is attenuated, balance shifted right */ | |
7a00d45c MCC |
359 | ctrl->value = (32768 + 1057*(t->lf)); |
360 | return 0; | |
361 | } | |
362 | case V4L2_CID_AUDIO_BASS: | |
363 | { | |
1da177e4 | 364 | /* Bass/treble 4 bits each */ |
7a00d45c MCC |
365 | int bass=t->bass; |
366 | if(bass >= 0x8) | |
367 | bass = ~(bass - 0x8) & 0xf; | |
368 | ctrl->value = (bass << 12)+(bass << 8)+(bass << 4)+(bass); | |
369 | return 0; | |
1da177e4 | 370 | } |
7a00d45c | 371 | case V4L2_CID_AUDIO_TREBLE: |
1da177e4 | 372 | { |
7a00d45c MCC |
373 | int treble=t->treble; |
374 | if(treble >= 0x8) | |
375 | treble = ~(treble - 0x8) & 0xf; | |
376 | ctrl->value = (treble << 12)+(treble << 8)+(treble << 4)+(treble); | |
377 | return 0; | |
378 | } | |
379 | } | |
380 | return -EINVAL; | |
381 | } | |
1da177e4 | 382 | |
7a00d45c MCC |
383 | static int tda7432_set_ctrl(struct i2c_client *client, |
384 | struct v4l2_control *ctrl) | |
385 | { | |
386 | struct tda7432 *t = i2c_get_clientdata(client); | |
1da177e4 | 387 | |
7a00d45c MCC |
388 | switch (ctrl->id) { |
389 | case V4L2_CID_AUDIO_MUTE: | |
390 | t->muted=ctrl->value; | |
391 | break; | |
392 | case V4L2_CID_AUDIO_VOLUME: | |
393 | if(!maxvol){ /* max +20db */ | |
394 | t->volume = 0x6f - ((ctrl->value)/630); | |
395 | } else { /* max 0db */ | |
396 | t->volume = 0x6f - ((ctrl->value)/829); | |
397 | } | |
1da177e4 LT |
398 | if (loudness) /* Turn on the loudness bit */ |
399 | t->volume |= TDA7432_LD_ON; | |
400 | ||
7a00d45c MCC |
401 | tda7432_write(client,TDA7432_VL, t->volume); |
402 | return 0; | |
403 | case V4L2_CID_AUDIO_BALANCE: | |
404 | if (ctrl->value < 32768) { | |
1da177e4 | 405 | /* shifted to left, attenuate right */ |
7a00d45c | 406 | t->rr = (32768 - ctrl->value)/1057; |
1da177e4 LT |
407 | t->rf = t->rr; |
408 | t->lr = TDA7432_ATTEN_0DB; | |
409 | t->lf = TDA7432_ATTEN_0DB; | |
7a00d45c | 410 | } else if(ctrl->value > 32769) { |
1da177e4 | 411 | /* shifted to right, attenuate left */ |
7a00d45c | 412 | t->lf = (ctrl->value - 32768)/1057; |
1da177e4 LT |
413 | t->lr = t->lf; |
414 | t->rr = TDA7432_ATTEN_0DB; | |
415 | t->rf = TDA7432_ATTEN_0DB; | |
7a00d45c | 416 | } else { |
1da177e4 LT |
417 | /* centered */ |
418 | t->rr = TDA7432_ATTEN_0DB; | |
419 | t->rf = TDA7432_ATTEN_0DB; | |
420 | t->lf = TDA7432_ATTEN_0DB; | |
421 | t->lr = TDA7432_ATTEN_0DB; | |
422 | } | |
7a00d45c MCC |
423 | break; |
424 | case V4L2_CID_AUDIO_BASS: | |
425 | t->bass = ctrl->value >> 12; | |
426 | if(t->bass>= 0x8) | |
427 | t->bass = (~t->bass & 0xf) + 0x8 ; | |
428 | ||
429 | tda7432_write(client,TDA7432_TN, 0x10 | (t->bass << 4) | t->treble ); | |
430 | return 0; | |
431 | case V4L2_CID_AUDIO_TREBLE: | |
432 | t->treble= ctrl->value >> 12; | |
433 | if(t->treble>= 0x8) | |
434 | t->treble = (~t->treble & 0xf) + 0x8 ; | |
435 | ||
436 | tda7432_write(client,TDA7432_TN, 0x10 | (t->bass << 4) | t->treble ); | |
437 | return 0; | |
438 | default: | |
439 | return -EINVAL; | |
440 | } | |
1da177e4 | 441 | |
7a00d45c MCC |
442 | /* Used for both mute and balance changes */ |
443 | if (t->muted) | |
444 | { | |
445 | /* Mute & update balance*/ | |
446 | tda7432_write(client,TDA7432_LF, t->lf | TDA7432_MUTE); | |
447 | tda7432_write(client,TDA7432_LR, t->lr | TDA7432_MUTE); | |
448 | tda7432_write(client,TDA7432_RF, t->rf | TDA7432_MUTE); | |
449 | tda7432_write(client,TDA7432_RR, t->rr | TDA7432_MUTE); | |
450 | } else { | |
451 | tda7432_write(client,TDA7432_LF, t->lf); | |
452 | tda7432_write(client,TDA7432_LR, t->lr); | |
453 | tda7432_write(client,TDA7432_RF, t->rf); | |
454 | tda7432_write(client,TDA7432_RR, t->rr); | |
455 | } | |
456 | return 0; | |
457 | } | |
1da177e4 | 458 | |
7a00d45c MCC |
459 | static int tda7432_command(struct i2c_client *client, |
460 | unsigned int cmd, void *arg) | |
461 | { | |
462 | v4l_dbg(2, debug,client,"In tda7432_command\n"); | |
463 | if (debug>1) | |
464 | v4l_i2c_print_ioctl(client,cmd); | |
465 | ||
466 | switch (cmd) { | |
467 | /* --- v4l ioctls --- */ | |
468 | /* take care: bttv does userspace copying, we'll get a | |
469 | kernel pointer here... */ | |
470 | case VIDIOC_QUERYCTRL: | |
471 | { | |
472 | struct v4l2_queryctrl *qc = arg; | |
473 | ||
474 | switch (qc->id) { | |
475 | case V4L2_CID_AUDIO_MUTE: | |
476 | case V4L2_CID_AUDIO_VOLUME: | |
477 | case V4L2_CID_AUDIO_BALANCE: | |
478 | case V4L2_CID_AUDIO_BASS: | |
479 | case V4L2_CID_AUDIO_TREBLE: | |
480 | default: | |
481 | return -EINVAL; | |
482 | } | |
483 | return v4l2_ctrl_query_fill_std(qc); | |
484 | } | |
485 | case VIDIOC_S_CTRL: | |
486 | return tda7432_set_ctrl(client, arg); | |
1da177e4 | 487 | |
7a00d45c MCC |
488 | case VIDIOC_G_CTRL: |
489 | return tda7432_get_ctrl(client, arg); | |
1da177e4 | 490 | |
1da177e4 LT |
491 | } /* end of (cmd) switch */ |
492 | ||
493 | return 0; | |
494 | } | |
495 | ||
496 | static struct i2c_driver driver = { | |
604f28e2 | 497 | .driver = { |
cab462f7 | 498 | .name = "tda7432", |
604f28e2 | 499 | }, |
1da177e4 | 500 | .id = I2C_DRIVERID_TDA7432, |
1da177e4 | 501 | .attach_adapter = tda7432_probe, |
4ac97914 MCC |
502 | .detach_client = tda7432_detach, |
503 | .command = tda7432_command, | |
1da177e4 LT |
504 | }; |
505 | ||
506 | static struct i2c_client client_template = | |
507 | { | |
fae91e72 | 508 | .name = "tda7432", |
1da177e4 LT |
509 | .driver = &driver, |
510 | }; | |
511 | ||
512 | static int __init tda7432_init(void) | |
513 | { | |
514 | if ( (loudness < 0) || (loudness > 15) ) { | |
0680481c | 515 | printk(KERN_ERR "loudness parameter must be between 0 and 15\n"); |
1da177e4 LT |
516 | return -EINVAL; |
517 | } | |
518 | ||
519 | return i2c_add_driver(&driver); | |
520 | } | |
521 | ||
522 | static void __exit tda7432_fini(void) | |
523 | { | |
524 | i2c_del_driver(&driver); | |
525 | } | |
526 | ||
527 | module_init(tda7432_init); | |
528 | module_exit(tda7432_fini); | |
529 | ||
530 | /* | |
531 | * Local variables: | |
532 | * c-basic-offset: 8 | |
533 | * End: | |
534 | */ |