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
zl10353_single_write(struct dvb_frontend * fe,u8 reg,u8 val)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
zl10353_write(struct dvb_frontend * fe,const u8 ibuf[],int ilen)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
zl10353_read_register(struct zl10353_state * state,u8 reg)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
zl10353_dump_regs(struct dvb_frontend * fe)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
zl10353_calc_nominal_rate(struct dvb_frontend * fe,u32 bandwidth,u16 * nominal_rate)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
zl10353_calc_input_freq(struct dvb_frontend * fe,u16 * input_freq)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
zl10353_sleep(struct dvb_frontend * fe)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
zl10353_set_parameters(struct dvb_frontend * fe)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
zl10353_get_parameters(struct dvb_frontend * fe,struct dtv_frontend_properties * c)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
zl10353_read_status(struct dvb_frontend * fe,enum fe_status * status)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
zl10353_read_ber(struct dvb_frontend * fe,u32 * ber)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
zl10353_read_signal_strength(struct dvb_frontend * fe,u16 * strength)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
zl10353_read_snr(struct dvb_frontend * fe,u16 * snr)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
zl10353_read_ucblocks(struct dvb_frontend * fe,u32 * ucblocks)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
zl10353_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * fe_tune_settings)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
zl10353_init(struct dvb_frontend * fe)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
zl10353_i2c_gate_ctrl(struct dvb_frontend * fe,int enable)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
zl10353_release(struct dvb_frontend * fe)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
zl10353_attach(const struct zl10353_config * config,struct i2c_adapter * i2c)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