1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Driver for Zarlink DVB-T ZL10353 demodulator
4  *
5  * Copyright (C) 2006, 2007 Christopher Pascoe <c.pascoe@itee.uq.edu.au>
6  */
7 
8 #include <linux/kernel.h>
9 #include <linux/module.h>
10 #include <linux/init.h>
11 #include <linux/delay.h>
12 #include <linux/string.h>
13 #include <linux/slab.h>
14 #include <asm/div64.h>
15 
16 #include <media/dvb_frontend.h>
17 #include "zl10353_priv.h"
18 #include "zl10353.h"
19 
20 struct zl10353_state {
21 	struct i2c_adapter *i2c;
22 	struct dvb_frontend frontend;
23 
24 	struct zl10353_config config;
25 
26 	u32 bandwidth;
27 	u32 ucblocks;
28 	u32 frequency;
29 };
30 
31 static int debug;
32 #define dprintk(args...) \
33 	do { \
34 		if (debug) printk(KERN_DEBUG "zl10353: " args); \
35 	} while (0)
36 
37 static int debug_regs;
38 
39 static int zl10353_single_write(struct dvb_frontend *fe, u8 reg, u8 val)
40 {
41 	struct zl10353_state *state = fe->demodulator_priv;
42 	u8 buf[2] = { reg, val };
43 	struct i2c_msg msg = { .addr = state->config.demod_address, .flags = 0,
44 			       .buf = buf, .len = 2 };
45 	int err = i2c_transfer(state->i2c, &msg, 1);
46 	if (err != 1) {
47 		printk("zl10353: write to reg %x failed (err = %d)!\n", reg, err);
48 		return err;
49 	}
50 	return 0;
51 }
52 
53 static int zl10353_write(struct dvb_frontend *fe, const u8 ibuf[], int ilen)
54 {
55 	int err, i;
56 	for (i = 0; i < ilen - 1; i++)
57 		if ((err = zl10353_single_write(fe, ibuf[0] + i, ibuf[i + 1])))
58 			return err;
59 
60 	return 0;
61 }
62 
63 static int zl10353_read_register(struct zl10353_state *state, u8 reg)
64 {
65 	int ret;
66 	u8 b0[1] = { reg };
67 	u8 b1[1] = { 0 };
68 	struct i2c_msg msg[2] = { { .addr = state->config.demod_address,
69 				    .flags = 0,
70 				    .buf = b0, .len = 1 },
71 				  { .addr = state->config.demod_address,
72 				    .flags = I2C_M_RD,
73 				    .buf = b1, .len = 1 } };
74 
75 	ret = i2c_transfer(state->i2c, msg, 2);
76 
77 	if (ret != 2) {
78 		printk("%s: readreg error (reg=%d, ret==%i)\n",
79 		       __func__, reg, ret);
80 		return ret;
81 	}
82 
83 	return b1[0];
84 }
85 
86 static void zl10353_dump_regs(struct dvb_frontend *fe)
87 {
88 	struct zl10353_state *state = fe->demodulator_priv;
89 	int ret;
90 	u8 reg;
91 
92 	/* Dump all registers. */
93 	for (reg = 0; ; reg++) {
94 		if (reg % 16 == 0) {
95 			if (reg)
96 				printk(KERN_CONT "\n");
97 			printk(KERN_DEBUG "%02x:", reg);
98 		}
99 		ret = zl10353_read_register(state, reg);
100 		if (ret >= 0)
101 			printk(KERN_CONT " %02x", (u8)ret);
102 		else
103 			printk(KERN_CONT " --");
104 		if (reg == 0xff)
105 			break;
106 	}
107 	printk(KERN_CONT "\n");
108 }
109 
110 static void zl10353_calc_nominal_rate(struct dvb_frontend *fe,
111 				      u32 bandwidth,
112 				      u16 *nominal_rate)
113 {
114 	struct zl10353_state *state = fe->demodulator_priv;
115 	u32 adc_clock = 450560; /* 45.056 MHz */
116 	u64 value;
117 	u8 bw = bandwidth / 1000000;
118 
119 	if (state->config.adc_clock)
120 		adc_clock = state->config.adc_clock;
121 
122 	value = (u64)10 * (1 << 23) / 7 * 125;
123 	value = (bw * value) + adc_clock / 2;
124 	*nominal_rate = div_u64(value, adc_clock);
125 
126 	dprintk("%s: bw %d, adc_clock %d => 0x%x\n",
127 		__func__, bw, adc_clock, *nominal_rate);
128 }
129 
130 static void zl10353_calc_input_freq(struct dvb_frontend *fe,
131 				    u16 *input_freq)
132 {
133 	struct zl10353_state *state = fe->demodulator_priv;
134 	u32 adc_clock = 450560;	/* 45.056  MHz */
135 	int if2 = 361667;	/* 36.1667 MHz */
136 	int ife;
137 	u64 value;
138 
139 	if (state->config.adc_clock)
140 		adc_clock = state->config.adc_clock;
141 	if (state->config.if2)
142 		if2 = state->config.if2;
143 
144 	if (adc_clock >= if2 * 2)
145 		ife = if2;
146 	else {
147 		ife = adc_clock - (if2 % adc_clock);
148 		if (ife > adc_clock / 2)
149 			ife = adc_clock - ife;
150 	}
151 	value = div_u64((u64)65536 * ife + adc_clock / 2, adc_clock);
152 	*input_freq = -value;
153 
154 	dprintk("%s: if2 %d, ife %d, adc_clock %d => %d / 0x%x\n",
155 		__func__, if2, ife, adc_clock, -(int)value, *input_freq);
156 }
157 
158 static int zl10353_sleep(struct dvb_frontend *fe)
159 {
160 	static u8 zl10353_softdown[] = { 0x50, 0x0C, 0x44 };
161 
162 	zl10353_write(fe, zl10353_softdown, sizeof(zl10353_softdown));
163 	return 0;
164 }
165 
166 static int zl10353_set_parameters(struct dvb_frontend *fe)
167 {
168 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
169 	struct zl10353_state *state = fe->demodulator_priv;
170 	u16 nominal_rate, input_freq;
171 	u8 pllbuf[6] = { 0x67 }, acq_ctl = 0;
172 	u16 tps = 0;
173 
174 	state->frequency = c->frequency;
175 
176 	zl10353_single_write(fe, RESET, 0x80);
177 	udelay(200);
178 	zl10353_single_write(fe, 0xEA, 0x01);
179 	udelay(200);
180 	zl10353_single_write(fe, 0xEA, 0x00);
181 
182 	zl10353_single_write(fe, AGC_TARGET, 0x28);
183 
184 	if (c->transmission_mode != TRANSMISSION_MODE_AUTO)
185 		acq_ctl |= (1 << 0);
186 	if (c->guard_interval != GUARD_INTERVAL_AUTO)
187 		acq_ctl |= (1 << 1);
188 	zl10353_single_write(fe, ACQ_CTL, acq_ctl);
189 
190 	switch (c->bandwidth_hz) {
191 	case 6000000:
192 		/* These are extrapolated from the 7 and 8MHz values */
193 		zl10353_single_write(fe, MCLK_RATIO, 0x97);
194 		zl10353_single_write(fe, 0x64, 0x34);
195 		zl10353_single_write(fe, 0xcc, 0xdd);
196 		break;
197 	case 7000000:
198 		zl10353_single_write(fe, MCLK_RATIO, 0x86);
199 		zl10353_single_write(fe, 0x64, 0x35);
200 		zl10353_single_write(fe, 0xcc, 0x73);
201 		break;
202 	default:
203 		c->bandwidth_hz = 8000000;
204 		fallthrough;
205 	case 8000000:
206 		zl10353_single_write(fe, MCLK_RATIO, 0x75);
207 		zl10353_single_write(fe, 0x64, 0x36);
208 		zl10353_single_write(fe, 0xcc, 0x73);
209 	}
210 
211 	zl10353_calc_nominal_rate(fe, c->bandwidth_hz, &nominal_rate);
212 	zl10353_single_write(fe, TRL_NOMINAL_RATE_1, msb(nominal_rate));
213 	zl10353_single_write(fe, TRL_NOMINAL_RATE_0, lsb(nominal_rate));
214 	state->bandwidth = c->bandwidth_hz;
215 
216 	zl10353_calc_input_freq(fe, &input_freq);
217 	zl10353_single_write(fe, INPUT_FREQ_1, msb(input_freq));
218 	zl10353_single_write(fe, INPUT_FREQ_0, lsb(input_freq));
219 
220 	/* Hint at TPS settings */
221 	switch (c->code_rate_HP) {
222 	case FEC_2_3:
223 		tps |= (1 << 7);
224 		break;
225 	case FEC_3_4:
226 		tps |= (2 << 7);
227 		break;
228 	case FEC_5_6:
229 		tps |= (3 << 7);
230 		break;
231 	case FEC_7_8:
232 		tps |= (4 << 7);
233 		break;
234 	case FEC_1_2:
235 	case FEC_AUTO:
236 		break;
237 	default:
238 		return -EINVAL;
239 	}
240 
241 	switch (c->code_rate_LP) {
242 	case FEC_2_3:
243 		tps |= (1 << 4);
244 		break;
245 	case FEC_3_4:
246 		tps |= (2 << 4);
247 		break;
248 	case FEC_5_6:
249 		tps |= (3 << 4);
250 		break;
251 	case FEC_7_8:
252 		tps |= (4 << 4);
253 		break;
254 	case FEC_1_2:
255 	case FEC_AUTO:
256 		break;
257 	case FEC_NONE:
258 		if (c->hierarchy == HIERARCHY_AUTO ||
259 		    c->hierarchy == HIERARCHY_NONE)
260 			break;
261 		fallthrough;
262 	default:
263 		return -EINVAL;
264 	}
265 
266 	switch (c->modulation) {
267 	case QPSK:
268 		break;
269 	case QAM_AUTO:
270 	case QAM_16:
271 		tps |= (1 << 13);
272 		break;
273 	case QAM_64:
274 		tps |= (2 << 13);
275 		break;
276 	default:
277 		return -EINVAL;
278 	}
279 
280 	switch (c->transmission_mode) {
281 	case TRANSMISSION_MODE_2K:
282 	case TRANSMISSION_MODE_AUTO:
283 		break;
284 	case TRANSMISSION_MODE_8K:
285 		tps |= (1 << 0);
286 		break;
287 	default:
288 		return -EINVAL;
289 	}
290 
291 	switch (c->guard_interval) {
292 	case GUARD_INTERVAL_1_32:
293 	case GUARD_INTERVAL_AUTO:
294 		break;
295 	case GUARD_INTERVAL_1_16:
296 		tps |= (1 << 2);
297 		break;
298 	case GUARD_INTERVAL_1_8:
299 		tps |= (2 << 2);
300 		break;
301 	case GUARD_INTERVAL_1_4:
302 		tps |= (3 << 2);
303 		break;
304 	default:
305 		return -EINVAL;
306 	}
307 
308 	switch (c->hierarchy) {
309 	case HIERARCHY_AUTO:
310 	case HIERARCHY_NONE:
311 		break;
312 	case HIERARCHY_1:
313 		tps |= (1 << 10);
314 		break;
315 	case HIERARCHY_2:
316 		tps |= (2 << 10);
317 		break;
318 	case HIERARCHY_4:
319 		tps |= (3 << 10);
320 		break;
321 	default:
322 		return -EINVAL;
323 	}
324 
325 	zl10353_single_write(fe, TPS_GIVEN_1, msb(tps));
326 	zl10353_single_write(fe, TPS_GIVEN_0, lsb(tps));
327 
328 	if (fe->ops.i2c_gate_ctrl)
329 		fe->ops.i2c_gate_ctrl(fe, 0);
330 
331 	/*
332 	 * If there is no tuner attached to the secondary I2C bus, we call
333 	 * set_params to program a potential tuner attached somewhere else.
334 	 * Otherwise, we update the PLL registers via calc_regs.
335 	 */
336 	if (state->config.no_tuner) {
337 		if (fe->ops.tuner_ops.set_params) {
338 			fe->ops.tuner_ops.set_params(fe);
339 			if (fe->ops.i2c_gate_ctrl)
340 				fe->ops.i2c_gate_ctrl(fe, 0);
341 		}
342 	} else if (fe->ops.tuner_ops.calc_regs) {
343 		fe->ops.tuner_ops.calc_regs(fe, pllbuf + 1, 5);
344 		pllbuf[1] <<= 1;
345 		zl10353_write(fe, pllbuf, sizeof(pllbuf));
346 	}
347 
348 	zl10353_single_write(fe, 0x5F, 0x13);
349 
350 	/* If no attached tuner or invalid PLL registers, just start the FSM. */
351 	if (state->config.no_tuner || fe->ops.tuner_ops.calc_regs == NULL)
352 		zl10353_single_write(fe, FSM_GO, 0x01);
353 	else
354 		zl10353_single_write(fe, TUNER_GO, 0x01);
355 
356 	return 0;
357 }
358 
359 static int zl10353_get_parameters(struct dvb_frontend *fe,
360 				  struct dtv_frontend_properties *c)
361 {
362 	struct zl10353_state *state = fe->demodulator_priv;
363 	int s6, s9;
364 	u16 tps;
365 	static const u8 tps_fec_to_api[8] = {
366 		FEC_1_2,
367 		FEC_2_3,
368 		FEC_3_4,
369 		FEC_5_6,
370 		FEC_7_8,
371 		FEC_AUTO,
372 		FEC_AUTO,
373 		FEC_AUTO
374 	};
375 
376 	s6 = zl10353_read_register(state, STATUS_6);
377 	s9 = zl10353_read_register(state, STATUS_9);
378 	if (s6 < 0 || s9 < 0)
379 		return -EREMOTEIO;
380 	if ((s6 & (1 << 5)) == 0 || (s9 & (1 << 4)) == 0)
381 		return -EINVAL;	/* no FE or TPS lock */
382 
383 	tps = zl10353_read_register(state, TPS_RECEIVED_1) << 8 |
384 	      zl10353_read_register(state, TPS_RECEIVED_0);
385 
386 	c->code_rate_HP = tps_fec_to_api[(tps >> 7) & 7];
387 	c->code_rate_LP = tps_fec_to_api[(tps >> 4) & 7];
388 
389 	switch ((tps >> 13) & 3) {
390 	case 0:
391 		c->modulation = QPSK;
392 		break;
393 	case 1:
394 		c->modulation = QAM_16;
395 		break;
396 	case 2:
397 		c->modulation = QAM_64;
398 		break;
399 	default:
400 		c->modulation = QAM_AUTO;
401 		break;
402 	}
403 
404 	c->transmission_mode = (tps & 0x01) ? TRANSMISSION_MODE_8K :
405 					       TRANSMISSION_MODE_2K;
406 
407 	switch ((tps >> 2) & 3) {
408 	case 0:
409 		c->guard_interval = GUARD_INTERVAL_1_32;
410 		break;
411 	case 1:
412 		c->guard_interval = GUARD_INTERVAL_1_16;
413 		break;
414 	case 2:
415 		c->guard_interval = GUARD_INTERVAL_1_8;
416 		break;
417 	case 3:
418 		c->guard_interval = GUARD_INTERVAL_1_4;
419 		break;
420 	default:
421 		c->guard_interval = GUARD_INTERVAL_AUTO;
422 		break;
423 	}
424 
425 	switch ((tps >> 10) & 7) {
426 	case 0:
427 		c->hierarchy = HIERARCHY_NONE;
428 		break;
429 	case 1:
430 		c->hierarchy = HIERARCHY_1;
431 		break;
432 	case 2:
433 		c->hierarchy = HIERARCHY_2;
434 		break;
435 	case 3:
436 		c->hierarchy = HIERARCHY_4;
437 		break;
438 	default:
439 		c->hierarchy = HIERARCHY_AUTO;
440 		break;
441 	}
442 
443 	c->frequency = state->frequency;
444 	c->bandwidth_hz = state->bandwidth;
445 	c->inversion = INVERSION_AUTO;
446 
447 	return 0;
448 }
449 
450 static int zl10353_read_status(struct dvb_frontend *fe, enum fe_status *status)
451 {
452 	struct zl10353_state *state = fe->demodulator_priv;
453 	int s6, s7, s8;
454 
455 	if ((s6 = zl10353_read_register(state, STATUS_6)) < 0)
456 		return -EREMOTEIO;
457 	if ((s7 = zl10353_read_register(state, STATUS_7)) < 0)
458 		return -EREMOTEIO;
459 	if ((s8 = zl10353_read_register(state, STATUS_8)) < 0)
460 		return -EREMOTEIO;
461 
462 	*status = 0;
463 	if (s6 & (1 << 2))
464 		*status |= FE_HAS_CARRIER;
465 	if (s6 & (1 << 1))
466 		*status |= FE_HAS_VITERBI;
467 	if (s6 & (1 << 5))
468 		*status |= FE_HAS_LOCK;
469 	if (s7 & (1 << 4))
470 		*status |= FE_HAS_SYNC;
471 	if (s8 & (1 << 6))
472 		*status |= FE_HAS_SIGNAL;
473 
474 	if ((*status & (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC)) !=
475 	    (FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC))
476 		*status &= ~FE_HAS_LOCK;
477 
478 	return 0;
479 }
480 
481 static int zl10353_read_ber(struct dvb_frontend *fe, u32 *ber)
482 {
483 	struct zl10353_state *state = fe->demodulator_priv;
484 
485 	*ber = zl10353_read_register(state, RS_ERR_CNT_2) << 16 |
486 	       zl10353_read_register(state, RS_ERR_CNT_1) << 8 |
487 	       zl10353_read_register(state, RS_ERR_CNT_0);
488 
489 	return 0;
490 }
491 
492 static int zl10353_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
493 {
494 	struct zl10353_state *state = fe->demodulator_priv;
495 
496 	u16 signal = zl10353_read_register(state, AGC_GAIN_1) << 10 |
497 		     zl10353_read_register(state, AGC_GAIN_0) << 2 | 3;
498 
499 	*strength = ~signal;
500 
501 	return 0;
502 }
503 
504 static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr)
505 {
506 	struct zl10353_state *state = fe->demodulator_priv;
507 	u8 _snr;
508 
509 	if (debug_regs)
510 		zl10353_dump_regs(fe);
511 
512 	_snr = zl10353_read_register(state, SNR);
513 	*snr = 10 * _snr / 8;
514 
515 	return 0;
516 }
517 
518 static int zl10353_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
519 {
520 	struct zl10353_state *state = fe->demodulator_priv;
521 	u32 ubl = 0;
522 
523 	ubl = zl10353_read_register(state, RS_UBC_1) << 8 |
524 	      zl10353_read_register(state, RS_UBC_0);
525 
526 	state->ucblocks += ubl;
527 	*ucblocks = state->ucblocks;
528 
529 	return 0;
530 }
531 
532 static int zl10353_get_tune_settings(struct dvb_frontend *fe,
533 				     struct dvb_frontend_tune_settings
534 					 *fe_tune_settings)
535 {
536 	fe_tune_settings->min_delay_ms = 1000;
537 	fe_tune_settings->step_size = 0;
538 	fe_tune_settings->max_drift = 0;
539 
540 	return 0;
541 }
542 
543 static int zl10353_init(struct dvb_frontend *fe)
544 {
545 	struct zl10353_state *state = fe->demodulator_priv;
546 	u8 zl10353_reset_attach[6] = { 0x50, 0x03, 0x64, 0x46, 0x15, 0x0F };
547 
548 	if (debug_regs)
549 		zl10353_dump_regs(fe);
550 	if (state->config.parallel_ts)
551 		zl10353_reset_attach[2] &= ~0x20;
552 	if (state->config.clock_ctl_1)
553 		zl10353_reset_attach[3] = state->config.clock_ctl_1;
554 	if (state->config.pll_0)
555 		zl10353_reset_attach[4] = state->config.pll_0;
556 
557 	/* Do a "hard" reset if not already done */
558 	if (zl10353_read_register(state, 0x50) != zl10353_reset_attach[1] ||
559 	    zl10353_read_register(state, 0x51) != zl10353_reset_attach[2]) {
560 		zl10353_write(fe, zl10353_reset_attach,
561 				   sizeof(zl10353_reset_attach));
562 		if (debug_regs)
563 			zl10353_dump_regs(fe);
564 	}
565 
566 	return 0;
567 }
568 
569 static int zl10353_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
570 {
571 	struct zl10353_state *state = fe->demodulator_priv;
572 	u8 val = 0x0a;
573 
574 	if (state->config.disable_i2c_gate_ctrl) {
575 		/* No tuner attached to the internal I2C bus */
576 		/* If set enable I2C bridge, the main I2C bus stopped hardly */
577 		return 0;
578 	}
579 
580 	if (enable)
581 		val |= 0x10;
582 
583 	return zl10353_single_write(fe, 0x62, val);
584 }
585 
586 static void zl10353_release(struct dvb_frontend *fe)
587 {
588 	struct zl10353_state *state = fe->demodulator_priv;
589 	kfree(state);
590 }
591 
592 static const struct dvb_frontend_ops zl10353_ops;
593 
594 struct dvb_frontend *zl10353_attach(const struct zl10353_config *config,
595 				    struct i2c_adapter *i2c)
596 {
597 	struct zl10353_state *state = NULL;
598 	int id;
599 
600 	/* allocate memory for the internal state */
601 	state = kzalloc(sizeof(struct zl10353_state), GFP_KERNEL);
602 	if (state == NULL)
603 		goto error;
604 
605 	/* setup the state */
606 	state->i2c = i2c;
607 	memcpy(&state->config, config, sizeof(struct zl10353_config));
608 
609 	/* check if the demod is there */
610 	id = zl10353_read_register(state, CHIP_ID);
611 	if ((id != ID_ZL10353) && (id != ID_CE6230) && (id != ID_CE6231))
612 		goto error;
613 
614 	/* create dvb_frontend */
615 	memcpy(&state->frontend.ops, &zl10353_ops, sizeof(struct dvb_frontend_ops));
616 	state->frontend.demodulator_priv = state;
617 
618 	return &state->frontend;
619 error:
620 	kfree(state);
621 	return NULL;
622 }
623 
624 static const struct dvb_frontend_ops zl10353_ops = {
625 	.delsys = { SYS_DVBT },
626 	.info = {
627 		.name			= "Zarlink ZL10353 DVB-T",
628 		.frequency_min_hz	= 174 * MHz,
629 		.frequency_max_hz	= 862 * MHz,
630 		.frequency_stepsize_hz	= 166667,
631 		.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 |
632 			FE_CAN_FEC_3_4 | FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
633 			FE_CAN_FEC_AUTO |
634 			FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
635 			FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
636 			FE_CAN_HIERARCHY_AUTO | FE_CAN_RECOVER |
637 			FE_CAN_MUTE_TS
638 	},
639 
640 	.release = zl10353_release,
641 
642 	.init = zl10353_init,
643 	.sleep = zl10353_sleep,
644 	.i2c_gate_ctrl = zl10353_i2c_gate_ctrl,
645 	.write = zl10353_write,
646 
647 	.set_frontend = zl10353_set_parameters,
648 	.get_frontend = zl10353_get_parameters,
649 	.get_tune_settings = zl10353_get_tune_settings,
650 
651 	.read_status = zl10353_read_status,
652 	.read_ber = zl10353_read_ber,
653 	.read_signal_strength = zl10353_read_signal_strength,
654 	.read_snr = zl10353_read_snr,
655 	.read_ucblocks = zl10353_read_ucblocks,
656 };
657 
658 module_param(debug, int, 0644);
659 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
660 
661 module_param(debug_regs, int, 0644);
662 MODULE_PARM_DESC(debug_regs, "Turn on/off frontend register dumps (default:off).");
663 
664 MODULE_DESCRIPTION("Zarlink ZL10353 DVB-T demodulator driver");
665 MODULE_AUTHOR("Chris Pascoe");
666 MODULE_LICENSE("GPL");
667 
668 EXPORT_SYMBOL_GPL(zl10353_attach);
669