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1da177e4 LT |
1 | /* |
2 | * bt819 - BT819A VideoStream Decoder (Rockwell Part) | |
3 | * | |
4 | * Copyright (C) 1999 Mike Bernson <mike@mlb.org> | |
5 | * Copyright (C) 1998 Dave Perks <dperks@ibm.net> | |
6 | * | |
7 | * Modifications for LML33/DC10plus unified driver | |
8 | * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx> | |
9 | * | |
10 | * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> | |
11 | * - moved over to linux>=2.4.x i2c protocol (9/9/2002) | |
12 | * | |
13 | * This code was modify/ported from the saa7111 driver written | |
14 | * by Dave Perks. | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
20 | * | |
21 | * This program is distributed in the hope that it will be useful, | |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
25 | * | |
26 | * You should have received a copy of the GNU General Public License | |
27 | * along with this program; if not, write to the Free Software | |
28 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
29 | */ | |
30 | ||
31 | #include <linux/module.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/errno.h> | |
35 | #include <linux/fs.h> | |
36 | #include <linux/kernel.h> | |
37 | #include <linux/major.h> | |
38 | #include <linux/slab.h> | |
39 | #include <linux/mm.h> | |
40 | #include <linux/pci.h> | |
41 | #include <linux/signal.h> | |
42 | #include <asm/io.h> | |
43 | #include <asm/pgtable.h> | |
44 | #include <asm/page.h> | |
45 | #include <linux/sched.h> | |
1da177e4 LT |
46 | #include <linux/types.h> |
47 | ||
48 | #include <linux/videodev.h> | |
49 | #include <asm/uaccess.h> | |
50 | ||
51 | MODULE_DESCRIPTION("Brooktree-819 video decoder driver"); | |
52 | MODULE_AUTHOR("Mike Bernson & Dave Perks"); | |
53 | MODULE_LICENSE("GPL"); | |
54 | ||
55 | #include <linux/i2c.h> | |
56 | #include <linux/i2c-dev.h> | |
57 | ||
58 | #define I2C_NAME(s) (s)->name | |
59 | ||
60 | #include <linux/video_decoder.h> | |
61 | ||
62 | static int debug = 0; | |
63 | module_param(debug, int, 0); | |
64 | MODULE_PARM_DESC(debug, "Debug level (0-1)"); | |
65 | ||
66 | #define dprintk(num, format, args...) \ | |
67 | do { \ | |
68 | if (debug >= num) \ | |
69 | printk(format, ##args); \ | |
70 | } while (0) | |
71 | ||
72 | /* ----------------------------------------------------------------------- */ | |
73 | ||
74 | struct bt819 { | |
75 | unsigned char reg[32]; | |
76 | ||
77 | int initialized; | |
78 | int norm; | |
79 | int input; | |
80 | int enable; | |
81 | int bright; | |
82 | int contrast; | |
83 | int hue; | |
84 | int sat; | |
85 | }; | |
86 | ||
87 | struct timing { | |
88 | int hactive; | |
89 | int hdelay; | |
90 | int vactive; | |
91 | int vdelay; | |
92 | int hscale; | |
93 | int vscale; | |
94 | }; | |
95 | ||
96 | /* for values, see the bt819 datasheet */ | |
97 | static struct timing timing_data[] = { | |
98 | {864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000}, | |
99 | {858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000}, | |
100 | }; | |
101 | ||
102 | #define I2C_BT819 0x8a | |
103 | ||
104 | /* ----------------------------------------------------------------------- */ | |
105 | ||
106 | static inline int | |
107 | bt819_write (struct i2c_client *client, | |
108 | u8 reg, | |
109 | u8 value) | |
110 | { | |
111 | struct bt819 *decoder = i2c_get_clientdata(client); | |
112 | ||
113 | decoder->reg[reg] = value; | |
114 | return i2c_smbus_write_byte_data(client, reg, value); | |
115 | } | |
116 | ||
117 | static inline int | |
118 | bt819_setbit (struct i2c_client *client, | |
119 | u8 reg, | |
120 | u8 bit, | |
121 | u8 value) | |
122 | { | |
123 | struct bt819 *decoder = i2c_get_clientdata(client); | |
124 | ||
125 | return bt819_write(client, reg, | |
126 | (decoder-> | |
127 | reg[reg] & ~(1 << bit)) | | |
128 | (value ? (1 << bit) : 0)); | |
129 | } | |
130 | ||
131 | static int | |
132 | bt819_write_block (struct i2c_client *client, | |
133 | const u8 *data, | |
134 | unsigned int len) | |
135 | { | |
136 | int ret = -1; | |
137 | u8 reg; | |
138 | ||
139 | /* the bt819 has an autoincrement function, use it if | |
140 | * the adapter understands raw I2C */ | |
141 | if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { | |
142 | /* do raw I2C, not smbus compatible */ | |
143 | struct bt819 *decoder = i2c_get_clientdata(client); | |
144 | struct i2c_msg msg; | |
145 | u8 block_data[32]; | |
146 | ||
147 | msg.addr = client->addr; | |
148 | msg.flags = 0; | |
149 | while (len >= 2) { | |
150 | msg.buf = (char *) block_data; | |
151 | msg.len = 0; | |
152 | block_data[msg.len++] = reg = data[0]; | |
153 | do { | |
154 | block_data[msg.len++] = | |
155 | decoder->reg[reg++] = data[1]; | |
156 | len -= 2; | |
157 | data += 2; | |
158 | } while (len >= 2 && data[0] == reg && | |
159 | msg.len < 32); | |
160 | if ((ret = i2c_transfer(client->adapter, | |
161 | &msg, 1)) < 0) | |
162 | break; | |
163 | } | |
164 | } else { | |
165 | /* do some slow I2C emulation kind of thing */ | |
166 | while (len >= 2) { | |
167 | reg = *data++; | |
168 | if ((ret = bt819_write(client, reg, *data++)) < 0) | |
169 | break; | |
170 | len -= 2; | |
171 | } | |
172 | } | |
173 | ||
174 | return ret; | |
175 | } | |
176 | ||
177 | static inline int | |
178 | bt819_read (struct i2c_client *client, | |
179 | u8 reg) | |
180 | { | |
181 | return i2c_smbus_read_byte_data(client, reg); | |
182 | } | |
183 | ||
184 | static int | |
185 | bt819_init (struct i2c_client *client) | |
186 | { | |
187 | struct bt819 *decoder = i2c_get_clientdata(client); | |
188 | ||
189 | static unsigned char init[] = { | |
190 | //0x1f, 0x00, /* Reset */ | |
191 | 0x01, 0x59, /* 0x01 input format */ | |
192 | 0x02, 0x00, /* 0x02 temporal decimation */ | |
193 | 0x03, 0x12, /* 0x03 Cropping msb */ | |
194 | 0x04, 0x16, /* 0x04 Vertical Delay, lsb */ | |
195 | 0x05, 0xe0, /* 0x05 Vertical Active lsb */ | |
196 | 0x06, 0x80, /* 0x06 Horizontal Delay lsb */ | |
197 | 0x07, 0xd0, /* 0x07 Horizontal Active lsb */ | |
198 | 0x08, 0x00, /* 0x08 Horizontal Scaling msb */ | |
199 | 0x09, 0xf8, /* 0x09 Horizontal Scaling lsb */ | |
200 | 0x0a, 0x00, /* 0x0a Brightness control */ | |
201 | 0x0b, 0x30, /* 0x0b Miscellaneous control */ | |
202 | 0x0c, 0xd8, /* 0x0c Luma Gain lsb */ | |
203 | 0x0d, 0xfe, /* 0x0d Chroma Gain (U) lsb */ | |
204 | 0x0e, 0xb4, /* 0x0e Chroma Gain (V) msb */ | |
205 | 0x0f, 0x00, /* 0x0f Hue control */ | |
206 | 0x12, 0x04, /* 0x12 Output Format */ | |
207 | 0x13, 0x20, /* 0x13 Vertial Scaling msb 0x00 | |
208 | chroma comb OFF, line drop scaling, interlace scaling | |
209 | BUG? Why does turning the chroma comb on fuck up color? | |
210 | Bug in the bt819 stepping on my board? | |
211 | */ | |
212 | 0x14, 0x00, /* 0x14 Vertial Scaling lsb */ | |
213 | 0x16, 0x07, /* 0x16 Video Timing Polarity | |
214 | ACTIVE=active low | |
215 | FIELD: high=odd, | |
216 | vreset=active high, | |
217 | hreset=active high */ | |
218 | 0x18, 0x68, /* 0x18 AGC Delay */ | |
219 | 0x19, 0x5d, /* 0x19 Burst Gate Delay */ | |
220 | 0x1a, 0x80, /* 0x1a ADC Interface */ | |
221 | }; | |
222 | ||
223 | struct timing *timing = &timing_data[decoder->norm]; | |
224 | ||
225 | init[0x03 * 2 - 1] = | |
226 | (((timing->vdelay >> 8) & 0x03) << 6) | (((timing-> | |
227 | vactive >> 8) & | |
228 | 0x03) << 4) | | |
229 | (((timing->hdelay >> 8) & 0x03) << 2) | ((timing-> | |
230 | hactive >> 8) & | |
231 | 0x03); | |
232 | init[0x04 * 2 - 1] = timing->vdelay & 0xff; | |
233 | init[0x05 * 2 - 1] = timing->vactive & 0xff; | |
234 | init[0x06 * 2 - 1] = timing->hdelay & 0xff; | |
235 | init[0x07 * 2 - 1] = timing->hactive & 0xff; | |
236 | init[0x08 * 2 - 1] = timing->hscale >> 8; | |
237 | init[0x09 * 2 - 1] = timing->hscale & 0xff; | |
238 | /* 0x15 in array is address 0x19 */ | |
239 | init[0x15 * 2 - 1] = (decoder->norm == 0) ? 115 : 93; /* Chroma burst delay */ | |
240 | /* reset */ | |
241 | bt819_write(client, 0x1f, 0x00); | |
242 | mdelay(1); | |
243 | ||
244 | /* init */ | |
245 | return bt819_write_block(client, init, sizeof(init)); | |
246 | ||
247 | } | |
248 | ||
249 | /* ----------------------------------------------------------------------- */ | |
250 | ||
251 | static int | |
252 | bt819_command (struct i2c_client *client, | |
253 | unsigned int cmd, | |
254 | void *arg) | |
255 | { | |
256 | int temp; | |
257 | ||
258 | struct bt819 *decoder = i2c_get_clientdata(client); | |
259 | ||
260 | if (!decoder->initialized) { // First call to bt819_init could be | |
261 | bt819_init(client); // without #FRST = 0 | |
262 | decoder->initialized = 1; | |
263 | } | |
264 | ||
265 | switch (cmd) { | |
266 | ||
267 | case 0: | |
268 | /* This is just for testing!!! */ | |
269 | bt819_init(client); | |
270 | break; | |
271 | ||
272 | case DECODER_GET_CAPABILITIES: | |
273 | { | |
274 | struct video_decoder_capability *cap = arg; | |
275 | ||
276 | cap->flags = VIDEO_DECODER_PAL | | |
277 | VIDEO_DECODER_NTSC | | |
278 | VIDEO_DECODER_AUTO | | |
279 | VIDEO_DECODER_CCIR; | |
280 | cap->inputs = 8; | |
281 | cap->outputs = 1; | |
282 | } | |
283 | break; | |
284 | ||
285 | case DECODER_GET_STATUS: | |
286 | { | |
287 | int *iarg = arg; | |
288 | int status; | |
289 | int res; | |
290 | ||
291 | status = bt819_read(client, 0x00); | |
292 | res = 0; | |
293 | if ((status & 0x80)) { | |
294 | res |= DECODER_STATUS_GOOD; | |
295 | } | |
296 | switch (decoder->norm) { | |
297 | case VIDEO_MODE_NTSC: | |
298 | res |= DECODER_STATUS_NTSC; | |
299 | break; | |
300 | case VIDEO_MODE_PAL: | |
301 | res |= DECODER_STATUS_PAL; | |
302 | break; | |
303 | default: | |
304 | case VIDEO_MODE_AUTO: | |
305 | if ((status & 0x10)) { | |
306 | res |= DECODER_STATUS_PAL; | |
307 | } else { | |
308 | res |= DECODER_STATUS_NTSC; | |
309 | } | |
310 | break; | |
311 | } | |
312 | res |= DECODER_STATUS_COLOR; | |
313 | *iarg = res; | |
314 | ||
315 | dprintk(1, KERN_INFO "%s: get status %x\n", I2C_NAME(client), | |
316 | *iarg); | |
317 | } | |
318 | break; | |
319 | ||
320 | case DECODER_SET_NORM: | |
321 | { | |
322 | int *iarg = arg; | |
323 | struct timing *timing = NULL; | |
324 | ||
325 | dprintk(1, KERN_INFO "%s: set norm %x\n", I2C_NAME(client), | |
326 | *iarg); | |
327 | ||
328 | switch (*iarg) { | |
329 | case VIDEO_MODE_NTSC: | |
330 | bt819_setbit(client, 0x01, 0, 1); | |
331 | bt819_setbit(client, 0x01, 1, 0); | |
332 | bt819_setbit(client, 0x01, 5, 0); | |
333 | bt819_write(client, 0x18, 0x68); | |
334 | bt819_write(client, 0x19, 0x5d); | |
335 | //bt819_setbit(client, 0x1a, 5, 1); | |
336 | timing = &timing_data[VIDEO_MODE_NTSC]; | |
337 | break; | |
338 | case VIDEO_MODE_PAL: | |
339 | bt819_setbit(client, 0x01, 0, 1); | |
340 | bt819_setbit(client, 0x01, 1, 1); | |
341 | bt819_setbit(client, 0x01, 5, 1); | |
342 | bt819_write(client, 0x18, 0x7f); | |
343 | bt819_write(client, 0x19, 0x72); | |
344 | //bt819_setbit(client, 0x1a, 5, 0); | |
345 | timing = &timing_data[VIDEO_MODE_PAL]; | |
346 | break; | |
347 | case VIDEO_MODE_AUTO: | |
348 | bt819_setbit(client, 0x01, 0, 0); | |
349 | bt819_setbit(client, 0x01, 1, 0); | |
350 | break; | |
351 | default: | |
352 | dprintk(1, | |
353 | KERN_ERR | |
354 | "%s: unsupported norm %d\n", | |
355 | I2C_NAME(client), *iarg); | |
356 | return -EINVAL; | |
357 | } | |
358 | ||
359 | if (timing) { | |
360 | bt819_write(client, 0x03, | |
361 | (((timing->vdelay >> 8) & 0x03) << 6) | | |
362 | (((timing->vactive >> 8) & 0x03) << 4) | | |
363 | (((timing->hdelay >> 8) & 0x03) << 2) | | |
364 | ((timing->hactive >> 8) & 0x03) ); | |
365 | bt819_write(client, 0x04, timing->vdelay & 0xff); | |
366 | bt819_write(client, 0x05, timing->vactive & 0xff); | |
367 | bt819_write(client, 0x06, timing->hdelay & 0xff); | |
368 | bt819_write(client, 0x07, timing->hactive & 0xff); | |
369 | bt819_write(client, 0x08, (timing->hscale >> 8) & 0xff); | |
370 | bt819_write(client, 0x09, timing->hscale & 0xff); | |
371 | } | |
372 | ||
373 | decoder->norm = *iarg; | |
374 | } | |
375 | break; | |
376 | ||
377 | case DECODER_SET_INPUT: | |
378 | { | |
379 | int *iarg = arg; | |
380 | ||
381 | dprintk(1, KERN_INFO "%s: set input %x\n", I2C_NAME(client), | |
382 | *iarg); | |
383 | ||
384 | if (*iarg < 0 || *iarg > 7) { | |
385 | return -EINVAL; | |
386 | } | |
387 | ||
388 | if (decoder->input != *iarg) { | |
389 | decoder->input = *iarg; | |
390 | /* select mode */ | |
391 | if (decoder->input == 0) { | |
392 | bt819_setbit(client, 0x0b, 6, 0); | |
393 | bt819_setbit(client, 0x1a, 1, 1); | |
394 | } else { | |
395 | bt819_setbit(client, 0x0b, 6, 1); | |
396 | bt819_setbit(client, 0x1a, 1, 0); | |
397 | } | |
398 | } | |
399 | } | |
400 | break; | |
401 | ||
402 | case DECODER_SET_OUTPUT: | |
403 | { | |
404 | int *iarg = arg; | |
405 | ||
406 | dprintk(1, KERN_INFO "%s: set output %x\n", I2C_NAME(client), | |
407 | *iarg); | |
408 | ||
409 | /* not much choice of outputs */ | |
410 | if (*iarg != 0) { | |
411 | return -EINVAL; | |
412 | } | |
413 | } | |
414 | break; | |
415 | ||
416 | case DECODER_ENABLE_OUTPUT: | |
417 | { | |
418 | int *iarg = arg; | |
419 | int enable = (*iarg != 0); | |
420 | ||
421 | dprintk(1, KERN_INFO "%s: enable output %x\n", | |
422 | I2C_NAME(client), *iarg); | |
423 | ||
424 | if (decoder->enable != enable) { | |
425 | decoder->enable = enable; | |
426 | ||
427 | if (decoder->enable) { | |
428 | bt819_setbit(client, 0x16, 7, 0); | |
429 | } else { | |
430 | bt819_setbit(client, 0x16, 7, 1); | |
431 | } | |
432 | } | |
433 | } | |
434 | break; | |
435 | ||
436 | case DECODER_SET_PICTURE: | |
437 | { | |
438 | struct video_picture *pic = arg; | |
439 | ||
440 | dprintk(1, | |
441 | KERN_INFO | |
442 | "%s: set picture brightness %d contrast %d colour %d\n", | |
443 | I2C_NAME(client), pic->brightness, pic->contrast, | |
444 | pic->colour); | |
445 | ||
446 | ||
447 | if (decoder->bright != pic->brightness) { | |
448 | /* We want -128 to 127 we get 0-65535 */ | |
449 | decoder->bright = pic->brightness; | |
450 | bt819_write(client, 0x0a, | |
451 | (decoder->bright >> 8) - 128); | |
452 | } | |
453 | ||
454 | if (decoder->contrast != pic->contrast) { | |
455 | /* We want 0 to 511 we get 0-65535 */ | |
456 | decoder->contrast = pic->contrast; | |
457 | bt819_write(client, 0x0c, | |
458 | (decoder->contrast >> 7) & 0xff); | |
459 | bt819_setbit(client, 0x0b, 2, | |
460 | ((decoder->contrast >> 15) & 0x01)); | |
461 | } | |
462 | ||
463 | if (decoder->sat != pic->colour) { | |
464 | /* We want 0 to 511 we get 0-65535 */ | |
465 | decoder->sat = pic->colour; | |
466 | bt819_write(client, 0x0d, | |
467 | (decoder->sat >> 7) & 0xff); | |
468 | bt819_setbit(client, 0x0b, 1, | |
469 | ((decoder->sat >> 15) & 0x01)); | |
470 | ||
471 | temp = (decoder->sat * 201) / 237; | |
472 | bt819_write(client, 0x0e, (temp >> 7) & 0xff); | |
473 | bt819_setbit(client, 0x0b, 0, (temp >> 15) & 0x01); | |
474 | } | |
475 | ||
476 | if (decoder->hue != pic->hue) { | |
477 | /* We want -128 to 127 we get 0-65535 */ | |
478 | decoder->hue = pic->hue; | |
479 | bt819_write(client, 0x0f, | |
480 | 128 - (decoder->hue >> 8)); | |
481 | } | |
482 | } | |
483 | break; | |
484 | ||
485 | default: | |
486 | return -EINVAL; | |
487 | } | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | /* ----------------------------------------------------------------------- */ | |
493 | ||
494 | /* | |
495 | * Generic i2c probe | |
496 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' | |
497 | */ | |
498 | static unsigned short normal_i2c[] = { | |
499 | I2C_BT819 >> 1, | |
500 | I2C_CLIENT_END, | |
501 | }; | |
1da177e4 | 502 | |
68cc9d0b | 503 | static unsigned short ignore = I2C_CLIENT_END; |
1da177e4 LT |
504 | |
505 | static struct i2c_client_address_data addr_data = { | |
506 | .normal_i2c = normal_i2c, | |
68cc9d0b JD |
507 | .probe = &ignore, |
508 | .ignore = &ignore, | |
1da177e4 LT |
509 | }; |
510 | ||
511 | static struct i2c_driver i2c_driver_bt819; | |
512 | ||
513 | static int | |
514 | bt819_detect_client (struct i2c_adapter *adapter, | |
515 | int address, | |
516 | int kind) | |
517 | { | |
518 | int i, id; | |
519 | struct bt819 *decoder; | |
520 | struct i2c_client *client; | |
521 | ||
522 | dprintk(1, | |
523 | KERN_INFO | |
524 | "saa7111.c: detecting bt819 client on address 0x%x\n", | |
525 | address << 1); | |
526 | ||
527 | /* Check if the adapter supports the needed features */ | |
528 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
529 | return 0; | |
530 | ||
7408187d | 531 | client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); |
1da177e4 LT |
532 | if (client == 0) |
533 | return -ENOMEM; | |
1da177e4 LT |
534 | client->addr = address; |
535 | client->adapter = adapter; | |
536 | client->driver = &i2c_driver_bt819; | |
1da177e4 | 537 | |
7408187d | 538 | decoder = kzalloc(sizeof(struct bt819), GFP_KERNEL); |
1da177e4 LT |
539 | if (decoder == NULL) { |
540 | kfree(client); | |
541 | return -ENOMEM; | |
542 | } | |
1da177e4 LT |
543 | decoder->norm = VIDEO_MODE_NTSC; |
544 | decoder->input = 0; | |
545 | decoder->enable = 1; | |
546 | decoder->bright = 32768; | |
547 | decoder->contrast = 32768; | |
548 | decoder->hue = 32768; | |
549 | decoder->sat = 32768; | |
550 | decoder->initialized = 0; | |
551 | i2c_set_clientdata(client, decoder); | |
552 | ||
553 | id = bt819_read(client, 0x17); | |
554 | switch (id & 0xf0) { | |
555 | case 0x70: | |
556 | strlcpy(I2C_NAME(client), "bt819a", sizeof(I2C_NAME(client))); | |
557 | break; | |
558 | case 0x60: | |
559 | strlcpy(I2C_NAME(client), "bt817a", sizeof(I2C_NAME(client))); | |
560 | break; | |
561 | case 0x20: | |
562 | strlcpy(I2C_NAME(client), "bt815a", sizeof(I2C_NAME(client))); | |
563 | break; | |
564 | default: | |
565 | dprintk(1, | |
566 | KERN_ERR | |
567 | "bt819: unknown chip version 0x%x (ver 0x%x)\n", | |
568 | id & 0xf0, id & 0x0f); | |
569 | kfree(decoder); | |
570 | kfree(client); | |
571 | return 0; | |
572 | } | |
573 | ||
574 | i = i2c_attach_client(client); | |
575 | if (i) { | |
576 | kfree(client); | |
577 | kfree(decoder); | |
578 | return i; | |
579 | } | |
580 | ||
581 | i = bt819_init(client); | |
582 | if (i < 0) { | |
583 | dprintk(1, KERN_ERR "%s_attach: init status %d\n", | |
584 | I2C_NAME(client), i); | |
585 | } else { | |
586 | dprintk(1, | |
587 | KERN_INFO | |
588 | "%s_attach: chip version 0x%x at address 0x%x\n", | |
589 | I2C_NAME(client), id & 0x0f, | |
590 | client->addr << 1); | |
591 | } | |
592 | ||
593 | return 0; | |
594 | } | |
595 | ||
596 | static int | |
597 | bt819_attach_adapter (struct i2c_adapter *adapter) | |
598 | { | |
599 | return i2c_probe(adapter, &addr_data, &bt819_detect_client); | |
600 | } | |
601 | ||
602 | static int | |
603 | bt819_detach_client (struct i2c_client *client) | |
604 | { | |
605 | struct bt819 *decoder = i2c_get_clientdata(client); | |
606 | int err; | |
607 | ||
608 | err = i2c_detach_client(client); | |
609 | if (err) { | |
610 | return err; | |
611 | } | |
612 | ||
613 | kfree(decoder); | |
614 | kfree(client); | |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
619 | /* ----------------------------------------------------------------------- */ | |
620 | ||
621 | static struct i2c_driver i2c_driver_bt819 = { | |
604f28e2 | 622 | .driver = { |
604f28e2 LR |
623 | .name = "bt819", |
624 | }, | |
1da177e4 LT |
625 | |
626 | .id = I2C_DRIVERID_BT819, | |
1da177e4 LT |
627 | |
628 | .attach_adapter = bt819_attach_adapter, | |
629 | .detach_client = bt819_detach_client, | |
630 | .command = bt819_command, | |
631 | }; | |
632 | ||
633 | static int __init | |
634 | bt819_init_module (void) | |
635 | { | |
636 | return i2c_add_driver(&i2c_driver_bt819); | |
637 | } | |
638 | ||
639 | static void __exit | |
640 | bt819_exit (void) | |
641 | { | |
642 | i2c_del_driver(&i2c_driver_bt819); | |
643 | } | |
644 | ||
645 | module_init(bt819_init_module); | |
646 | module_exit(bt819_exit); |