Free Electrons

Embedded Linux Experts

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
/*
 *    Support for OR51132 (pcHDTV HD-3000) - VSB/QAM
 *
 *
 *    Copyright (C) 2007 Trent Piepho <xyzzy@speakeasy.org>
 *
 *    Copyright (C) 2005 Kirk Lapray <kirk_lapray@bigfoot.com>
 *
 *    Based on code from Jack Kelliher (kelliher@xmission.com)
 *                           Copyright (C) 2002 & pcHDTV, inc.
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
*/

/*
 * This driver needs two external firmware files. Please copy
 * "dvb-fe-or51132-vsb.fw" and "dvb-fe-or51132-qam.fw" to
 * /usr/lib/hotplug/firmware/ or /lib/firmware/
 * (depending on configuration of firmware hotplug).
 */
#define OR51132_VSB_FIRMWARE "dvb-fe-or51132-vsb.fw"
#define OR51132_QAM_FIRMWARE "dvb-fe-or51132-qam.fw"

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <asm/byteorder.h>

#include "dvb_math.h"
#include "dvb_frontend.h"
#include "or51132.h"

static int debug;
#define dprintk(args...) \
	do { \
		if (debug) printk(KERN_DEBUG "or51132: " args); \
	} while (0)


struct or51132_state
{
	struct i2c_adapter* i2c;

	/* Configuration settings */
	const struct or51132_config* config;

	struct dvb_frontend frontend;

	/* Demodulator private data */
	fe_modulation_t current_modulation;
	u32 snr; /* Result of last SNR calculation */

	/* Tuner private data */
	u32 current_frequency;
};


/* Write buffer to demod */
static int or51132_writebuf(struct or51132_state *state, const u8 *buf, int len)
{
	int err;
	struct i2c_msg msg = { .addr = state->config->demod_address,
			       .flags = 0, .buf = (u8*)buf, .len = len };

	/* msleep(20); */ /* doesn't appear to be necessary */
	if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
		printk(KERN_WARNING "or51132: I2C write (addr 0x%02x len %d) error: %d\n",
		       msg.addr, msg.len, err);
		return -EREMOTEIO;
	}
	return 0;
}

/* Write constant bytes, e.g. or51132_writebytes(state, 0x04, 0x42, 0x00);
   Less code and more efficient that loading a buffer on the stack with
   the bytes to send and then calling or51132_writebuf() on that. */
#define or51132_writebytes(state, data...)  \
	({ static const u8 _data[] = {data}; \
	or51132_writebuf(state, _data, sizeof(_data)); })

/* Read data from demod into buffer.  Returns 0 on success. */
static int or51132_readbuf(struct or51132_state *state, u8 *buf, int len)
{
	int err;
	struct i2c_msg msg = { .addr = state->config->demod_address,
			       .flags = I2C_M_RD, .buf = buf, .len = len };

	/* msleep(20); */ /* doesn't appear to be necessary */
	if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
		printk(KERN_WARNING "or51132: I2C read (addr 0x%02x len %d) error: %d\n",
		       msg.addr, msg.len, err);
		return -EREMOTEIO;
	}
	return 0;
}

/* Reads a 16-bit demod register.  Returns <0 on error. */
static int or51132_readreg(struct or51132_state *state, u8 reg)
{
	u8 buf[2] = { 0x04, reg };
	struct i2c_msg msg[2] = {
		{.addr = state->config->demod_address, .flags = 0,
		 .buf = buf, .len = 2 },
		{.addr = state->config->demod_address, .flags = I2C_M_RD,
		 .buf = buf, .len = 2 }};
	int err;

	if ((err = i2c_transfer(state->i2c, msg, 2)) != 2) {
		printk(KERN_WARNING "or51132: I2C error reading register %d: %d\n",
		       reg, err);
		return -EREMOTEIO;
	}
	return buf[0] | (buf[1] << 8);
}

static int or51132_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
{
	struct or51132_state* state = fe->demodulator_priv;
	static const u8 run_buf[] = {0x7F,0x01};
	u8 rec_buf[8];
	u32 firmwareAsize, firmwareBsize;
	int i,ret;

	dprintk("Firmware is %Zd bytes\n",fw->size);

	/* Get size of firmware A and B */
	firmwareAsize = le32_to_cpu(*((__le32*)fw->data));
	dprintk("FirmwareA is %i bytes\n",firmwareAsize);
	firmwareBsize = le32_to_cpu(*((__le32*)(fw->data+4)));
	dprintk("FirmwareB is %i bytes\n",firmwareBsize);

	/* Upload firmware */
	if ((ret = or51132_writebuf(state, &fw->data[8], firmwareAsize))) {
		printk(KERN_WARNING "or51132: load_firmware error 1\n");
		return ret;
	}
	if ((ret = or51132_writebuf(state, &fw->data[8+firmwareAsize],
				    firmwareBsize))) {
		printk(KERN_WARNING "or51132: load_firmware error 2\n");
		return ret;
	}

	if ((ret = or51132_writebuf(state, run_buf, 2))) {
		printk(KERN_WARNING "or51132: load_firmware error 3\n");
		return ret;
	}
	if ((ret = or51132_writebuf(state, run_buf, 2))) {
		printk(KERN_WARNING "or51132: load_firmware error 4\n");
		return ret;
	}

	/* 50ms for operation to begin */
	msleep(50);

	/* Read back ucode version to besure we loaded correctly and are really up and running */
	/* Get uCode version */
	if ((ret = or51132_writebytes(state, 0x10, 0x10, 0x00))) {
		printk(KERN_WARNING "or51132: load_firmware error a\n");
		return ret;
	}
	if ((ret = or51132_writebytes(state, 0x04, 0x17))) {
		printk(KERN_WARNING "or51132: load_firmware error b\n");
		return ret;
	}
	if ((ret = or51132_writebytes(state, 0x00, 0x00))) {
		printk(KERN_WARNING "or51132: load_firmware error c\n");
		return ret;
	}
	for (i=0;i<4;i++) {
		/* Once upon a time, this command might have had something
		   to do with getting the firmware version, but it's
		   not used anymore:
		   {0x04,0x00,0x30,0x00,i+1} */
		/* Read 8 bytes, two bytes at a time */
		if ((ret = or51132_readbuf(state, &rec_buf[i*2], 2))) {
			printk(KERN_WARNING
			       "or51132: load_firmware error d - %d\n",i);
			return ret;
		}
	}

	printk(KERN_WARNING
	       "or51132: Version: %02X%02X%02X%02X-%02X%02X%02X%02X (%02X%01X-%01X-%02X%01X-%01X)\n",
	       rec_buf[1],rec_buf[0],rec_buf[3],rec_buf[2],
	       rec_buf[5],rec_buf[4],rec_buf[7],rec_buf[6],
	       rec_buf[3],rec_buf[2]>>4,rec_buf[2]&0x0f,
	       rec_buf[5],rec_buf[4]>>4,rec_buf[4]&0x0f);

	if ((ret = or51132_writebytes(state, 0x10, 0x00, 0x00))) {
		printk(KERN_WARNING "or51132: load_firmware error e\n");
		return ret;
	}
	return 0;
};

static int or51132_init(struct dvb_frontend* fe)
{
	return 0;
}

static int or51132_read_ber(struct dvb_frontend* fe, u32* ber)
{
	*ber = 0;
	return 0;
}

static int or51132_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
	*ucblocks = 0;
	return 0;
}

static int or51132_sleep(struct dvb_frontend* fe)
{
	return 0;
}

static int or51132_setmode(struct dvb_frontend* fe)
{
	struct or51132_state* state = fe->demodulator_priv;
	u8 cmd_buf1[3] = {0x04, 0x01, 0x5f};
	u8 cmd_buf2[3] = {0x1c, 0x00, 0 };

	dprintk("setmode %d\n",(int)state->current_modulation);

	switch (state->current_modulation) {
	case VSB_8:
		/* Auto CH, Auto NTSC rej, MPEGser, MPEG2tr, phase noise-high */
		cmd_buf1[2] = 0x50;
		/* REC MODE inv IF spectrum, Normal */
		cmd_buf2[1] = 0x03;
		/* Channel MODE ATSC/VSB8 */
		cmd_buf2[2] = 0x06;
		break;
	/* All QAM modes are:
	   Auto-deinterleave; MPEGser, MPEG2tr, phase noise-high
	   REC MODE Normal Carrier Lock */
	case QAM_AUTO:
		/* Channel MODE Auto QAM64/256 */
		cmd_buf2[2] = 0x4f;
		break;
	case QAM_256:
		/* Channel MODE QAM256 */
		cmd_buf2[2] = 0x45;
		break;
	case QAM_64:
		/* Channel MODE QAM64 */
		cmd_buf2[2] = 0x43;
		break;
	default:
		printk(KERN_WARNING
		       "or51132: setmode: Modulation set to unsupported value (%d)\n",
		       state->current_modulation);
		return -EINVAL;
	}

	/* Set Receiver 1 register */
	if (or51132_writebuf(state, cmd_buf1, 3)) {
		printk(KERN_WARNING "or51132: set_mode error 1\n");
		return -EREMOTEIO;
	}
	dprintk("set #1 to %02x\n", cmd_buf1[2]);

	/* Set operation mode in Receiver 6 register */
	if (or51132_writebuf(state, cmd_buf2, 3)) {
		printk(KERN_WARNING "or51132: set_mode error 2\n");
		return -EREMOTEIO;
	}
	dprintk("set #6 to 0x%02x%02x\n", cmd_buf2[1], cmd_buf2[2]);

	return 0;
}

/* Some modulations use the same firmware.  This classifies modulations
   by the firmware they use. */
#define MOD_FWCLASS_UNKNOWN	0
#define MOD_FWCLASS_VSB		1
#define MOD_FWCLASS_QAM		2
static int modulation_fw_class(fe_modulation_t modulation)
{
	switch(modulation) {
	case VSB_8:
		return MOD_FWCLASS_VSB;
	case QAM_AUTO:
	case QAM_64:
	case QAM_256:
		return MOD_FWCLASS_QAM;
	default:
		return MOD_FWCLASS_UNKNOWN;
	}
}

static int or51132_set_parameters(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	int ret;
	struct or51132_state* state = fe->demodulator_priv;
	const struct firmware *fw;
	const char *fwname;
	int clock_mode;

	/* Upload new firmware only if we need a different one */
	if (modulation_fw_class(state->current_modulation) !=
	    modulation_fw_class(p->modulation)) {
		switch (modulation_fw_class(p->modulation)) {
		case MOD_FWCLASS_VSB:
			dprintk("set_parameters VSB MODE\n");
			fwname = OR51132_VSB_FIRMWARE;

			/* Set non-punctured clock for VSB */
			clock_mode = 0;
			break;
		case MOD_FWCLASS_QAM:
			dprintk("set_parameters QAM MODE\n");
			fwname = OR51132_QAM_FIRMWARE;

			/* Set punctured clock for QAM */
			clock_mode = 1;
			break;
		default:
			printk("or51132: Modulation type(%d) UNSUPPORTED\n",
			       p->modulation);
			return -1;
		}
		printk("or51132: Waiting for firmware upload(%s)...\n",
		       fwname);
		ret = request_firmware(&fw, fwname, state->i2c->dev.parent);
		if (ret) {
			printk(KERN_WARNING "or51132: No firmware up"
			       "loaded(timeout or file not found?)\n");
			return ret;
		}
		ret = or51132_load_firmware(fe, fw);
		release_firmware(fw);
		if (ret) {
			printk(KERN_WARNING "or51132: Writing firmware to "
			       "device failed!\n");
			return ret;
		}
		printk("or51132: Firmware upload complete.\n");
		state->config->set_ts_params(fe, clock_mode);
	}
	/* Change only if we are actually changing the modulation */
	if (state->current_modulation != p->modulation) {
		state->current_modulation = p->modulation;
		or51132_setmode(fe);
	}

	if (fe->ops.tuner_ops.set_params) {
		fe->ops.tuner_ops.set_params(fe);
		if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
	}

	/* Set to current mode */
	or51132_setmode(fe);

	/* Update current frequency */
	state->current_frequency = p->frequency;
	return 0;
}

static int or51132_get_parameters(struct dvb_frontend* fe)
{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct or51132_state* state = fe->demodulator_priv;
	int status;
	int retry = 1;

start:
	/* Receiver Status */
	if ((status = or51132_readreg(state, 0x00)) < 0) {
		printk(KERN_WARNING "or51132: get_parameters: error reading receiver status\n");
		return -EREMOTEIO;
	}
	switch(status&0xff) {
	case 0x06:
		p->modulation = VSB_8;
		break;
	case 0x43:
		p->modulation = QAM_64;
		break;
	case 0x45:
		p->modulation = QAM_256;
		break;
	default:
		if (retry--)
			goto start;
		printk(KERN_WARNING "or51132: unknown status 0x%02x\n",
		       status&0xff);
		return -EREMOTEIO;
	}

	/* FIXME: Read frequency from frontend, take AFC into account */
	p->frequency = state->current_frequency;

	/* FIXME: How to read inversion setting? Receiver 6 register? */
	p->inversion = INVERSION_AUTO;

	return 0;
}

static int or51132_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
	struct or51132_state* state = fe->demodulator_priv;
	int reg;

	/* Receiver Status */
	if ((reg = or51132_readreg(state, 0x00)) < 0) {
		printk(KERN_WARNING "or51132: read_status: error reading receiver status: %d\n", reg);
		*status = 0;
		return -EREMOTEIO;
	}
	dprintk("%s: read_status %04x\n", __func__, reg);

	if (reg & 0x0100) /* Receiver Lock */
		*status = FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI|
			  FE_HAS_SYNC|FE_HAS_LOCK;
	else
		*status = 0;
	return 0;
}

/* Calculate SNR estimation (scaled by 2^24)

   8-VSB SNR and QAM equations from Oren datasheets

   For 8-VSB:
     SNR[dB] = 10 * log10(897152044.8282 / MSE^2 ) - K

     Where K = 0 if NTSC rejection filter is OFF; and
	   K = 3 if NTSC rejection filter is ON

   For QAM64:
     SNR[dB] = 10 * log10(897152044.8282 / MSE^2 )

   For QAM256:
     SNR[dB] = 10 * log10(907832426.314266  / MSE^2 )

   We re-write the snr equation as:
     SNR * 2^24 = 10*(c - 2*intlog10(MSE))
   Where for QAM256, c = log10(907832426.314266) * 2^24
   and for 8-VSB and QAM64, c = log10(897152044.8282) * 2^24 */

static u32 calculate_snr(u32 mse, u32 c)
{
	if (mse == 0) /* No signal */
		return 0;

	mse = 2*intlog10(mse);
	if (mse > c) {
		/* Negative SNR, which is possible, but realisticly the
		demod will lose lock before the signal gets this bad.  The
		API only allows for unsigned values, so just return 0 */
		return 0;
	}
	return 10*(c - mse);
}

static int or51132_read_snr(struct dvb_frontend* fe, u16* snr)
{
	struct or51132_state* state = fe->demodulator_priv;
	int noise, reg;
	u32 c, usK = 0;
	int retry = 1;

start:
	/* SNR after Equalizer */
	noise = or51132_readreg(state, 0x02);
	if (noise < 0) {
		printk(KERN_WARNING "or51132: read_snr: error reading equalizer\n");
		return -EREMOTEIO;
	}
	dprintk("read_snr noise (%d)\n", noise);

	/* Read status, contains modulation type for QAM_AUTO and
	   NTSC filter for VSB */
	reg = or51132_readreg(state, 0x00);
	if (reg < 0) {
		printk(KERN_WARNING "or51132: read_snr: error reading receiver status\n");
		return -EREMOTEIO;
	}

	switch (reg&0xff) {
	case 0x06:
		if (reg & 0x1000) usK = 3 << 24;
		/* Fall through to QAM64 case */
	case 0x43:
		c = 150204167;
		break;
	case 0x45:
		c = 150290396;
		break;
	default:
		printk(KERN_WARNING "or51132: unknown status 0x%02x\n", reg&0xff);
		if (retry--) goto start;
		return -EREMOTEIO;
	}
	dprintk("%s: modulation %02x, NTSC rej O%s\n", __func__,
		reg&0xff, reg&0x1000?"n":"ff");

	/* Calculate SNR using noise, c, and NTSC rejection correction */
	state->snr = calculate_snr(noise, c) - usK;
	*snr = (state->snr) >> 16;

	dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise,
		state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);

	return 0;
}

static int or51132_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
	/* Calculate Strength from SNR up to 35dB */
	/* Even though the SNR can go higher than 35dB, there is some comfort */
	/* factor in having a range of strong signals that can show at 100%   */
	struct or51132_state* state = (struct or51132_state*) fe->demodulator_priv;
	u16 snr;
	int ret;

	ret = fe->ops.read_snr(fe, &snr);
	if (ret != 0)
		return ret;
	/* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
	/* scale the range 0 - 35*2^24 into 0 - 65535 */
	if (state->snr >= 8960 * 0x10000)
		*strength = 0xffff;
	else
		*strength = state->snr / 8960;

	return 0;
}

static int or51132_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings)
{
	fe_tune_settings->min_delay_ms = 500;
	fe_tune_settings->step_size = 0;
	fe_tune_settings->max_drift = 0;

	return 0;
}

static void or51132_release(struct dvb_frontend* fe)
{
	struct or51132_state* state = fe->demodulator_priv;
	kfree(state);
}

static struct dvb_frontend_ops or51132_ops;

struct dvb_frontend* or51132_attach(const struct or51132_config* config,
				    struct i2c_adapter* i2c)
{
	struct or51132_state* state = NULL;

	/* Allocate memory for the internal state */
	state = kzalloc(sizeof(struct or51132_state), GFP_KERNEL);
	if (state == NULL)
		return NULL;

	/* Setup the state */
	state->config = config;
	state->i2c = i2c;
	state->current_frequency = -1;
	state->current_modulation = -1;

	/* Create dvb_frontend */
	memcpy(&state->frontend.ops, &or51132_ops, sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;
	return &state->frontend;
}

static struct dvb_frontend_ops or51132_ops = {
	.delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
	.info = {
		.name			= "Oren OR51132 VSB/QAM Frontend",
		.frequency_min		= 44000000,
		.frequency_max		= 958000000,
		.frequency_stepsize	= 166666,
		.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
			FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
			FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_QAM_AUTO |
			FE_CAN_8VSB
	},

	.release = or51132_release,

	.init = or51132_init,
	.sleep = or51132_sleep,

	.set_frontend = or51132_set_parameters,
	.get_frontend = or51132_get_parameters,
	.get_tune_settings = or51132_get_tune_settings,

	.read_status = or51132_read_status,
	.read_ber = or51132_read_ber,
	.read_signal_strength = or51132_read_signal_strength,
	.read_snr = or51132_read_snr,
	.read_ucblocks = or51132_read_ucblocks,
};

module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

MODULE_DESCRIPTION("OR51132 ATSC [pcHDTV HD-3000] (8VSB & ITU J83 AnnexB FEC QAM64/256) Demodulator Driver");
MODULE_AUTHOR("Kirk Lapray");
MODULE_AUTHOR("Trent Piepho");
MODULE_LICENSE("GPL");

EXPORT_SYMBOL(or51132_attach);

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */