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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 Driver for ST STV0299 demodulator4 5 Copyright (C) 2001-2002 Convergence Integrated Media GmbH6 <ralph@convergence.de>,7 <holger@convergence.de>,8 <js@convergence.de>9 10 11 Philips SU1278/SH12 13 Copyright (C) 2002 by Peter Schildmann <peter.schildmann@web.de>14 15 16 LG TDQF-S001F17 18 Copyright (C) 2002 Felix Domke <tmbinc@elitedvb.net>19 & Andreas Oberritter <obi@linuxtv.org>20 21 22 Support for Samsung TBMU24112IMB used on Technisat SkyStar2 rev. 2.6B23 24 Copyright (C) 2003 Vadim Catana <skystar@moldova.cc>:25 26 Support for Philips SU1278 on Technotrend hardware27 28 Copyright (C) 2004 Andrew de Quincey <adq_dvb@lidskialf.net>29 30 31*/32 33#include <linux/init.h>34#include <linux/kernel.h>35#include <linux/ktime.h>36#include <linux/module.h>37#include <linux/string.h>38#include <linux/slab.h>39#include <linux/jiffies.h>40#include <asm/div64.h>41 42#include <media/dvb_frontend.h>43#include "stv0299.h"44 45struct stv0299_state {46 struct i2c_adapter* i2c;47 const struct stv0299_config* config;48 struct dvb_frontend frontend;49 50 u8 initialised:1;51 u32 tuner_frequency;52 u32 symbol_rate;53 enum fe_code_rate fec_inner;54 int errmode;55 u32 ucblocks;56 u8 mcr_reg;57};58 59#define STATUS_BER 060#define STATUS_UCBLOCKS 161 62static int debug;63static int debug_legacy_dish_switch;64#define dprintk(args...) \65 do { \66 if (debug) printk(KERN_DEBUG "stv0299: " args); \67 } while (0)68 69 70static int stv0299_writeregI (struct stv0299_state* state, u8 reg, u8 data)71{72 int ret;73 u8 buf [] = { reg, data };74 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };75 76 ret = i2c_transfer (state->i2c, &msg, 1);77 78 if (ret != 1)79 dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n",80 __func__, reg, data, ret);81 82 return (ret != 1) ? -EREMOTEIO : 0;83}84 85static int stv0299_write(struct dvb_frontend* fe, const u8 buf[], int len)86{87 struct stv0299_state* state = fe->demodulator_priv;88 89 if (len != 2)90 return -EINVAL;91 92 return stv0299_writeregI(state, buf[0], buf[1]);93}94 95static u8 stv0299_readreg (struct stv0299_state* state, u8 reg)96{97 int ret;98 u8 b0 [] = { reg };99 u8 b1 [] = { 0 };100 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },101 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };102 103 ret = i2c_transfer (state->i2c, msg, 2);104 105 if (ret != 2)106 dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",107 __func__, reg, ret);108 109 return b1[0];110}111 112static int stv0299_readregs (struct stv0299_state* state, u8 reg1, u8 *b, u8 len)113{114 int ret;115 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®1, .len = 1 },116 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };117 118 ret = i2c_transfer (state->i2c, msg, 2);119 120 if (ret != 2)121 dprintk("%s: readreg error (ret == %i)\n", __func__, ret);122 123 return ret == 2 ? 0 : ret;124}125 126static int stv0299_set_FEC(struct stv0299_state *state, enum fe_code_rate fec)127{128 dprintk ("%s\n", __func__);129 130 switch (fec) {131 case FEC_AUTO:132 {133 return stv0299_writeregI (state, 0x31, 0x1f);134 }135 case FEC_1_2:136 {137 return stv0299_writeregI (state, 0x31, 0x01);138 }139 case FEC_2_3:140 {141 return stv0299_writeregI (state, 0x31, 0x02);142 }143 case FEC_3_4:144 {145 return stv0299_writeregI (state, 0x31, 0x04);146 }147 case FEC_5_6:148 {149 return stv0299_writeregI (state, 0x31, 0x08);150 }151 case FEC_7_8:152 {153 return stv0299_writeregI (state, 0x31, 0x10);154 }155 default:156 {157 return -EINVAL;158 }159 }160}161 162static enum fe_code_rate stv0299_get_fec(struct stv0299_state *state)163{164 static const enum fe_code_rate fec_tab[] = {165 FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, FEC_1_2166 };167 u8 index;168 169 dprintk ("%s\n", __func__);170 171 index = stv0299_readreg (state, 0x1b);172 index &= 0x7;173 174 if (index > 4)175 return FEC_AUTO;176 177 return fec_tab [index];178}179 180static int stv0299_wait_diseqc_fifo (struct stv0299_state* state, int timeout)181{182 unsigned long start = jiffies;183 184 dprintk ("%s\n", __func__);185 186 while (stv0299_readreg(state, 0x0a) & 1) {187 if (time_is_before_jiffies(start + timeout)) {188 dprintk ("%s: timeout!!\n", __func__);189 return -ETIMEDOUT;190 }191 msleep(10);192 }193 194 return 0;195}196 197static int stv0299_wait_diseqc_idle (struct stv0299_state* state, int timeout)198{199 unsigned long start = jiffies;200 201 dprintk ("%s\n", __func__);202 203 while ((stv0299_readreg(state, 0x0a) & 3) != 2 ) {204 if (time_is_before_jiffies(start + timeout)) {205 dprintk ("%s: timeout!!\n", __func__);206 return -ETIMEDOUT;207 }208 msleep(10);209 }210 211 return 0;212}213 214static int stv0299_set_symbolrate (struct dvb_frontend* fe, u32 srate)215{216 struct stv0299_state* state = fe->demodulator_priv;217 u64 big = srate;218 u32 ratio;219 220 // check rate is within limits221 if ((srate < 1000000) || (srate > 45000000)) return -EINVAL;222 223 // calculate value to program224 big = big << 20;225 big += (state->config->mclk-1); // round correctly226 do_div(big, state->config->mclk);227 ratio = big << 4;228 229 return state->config->set_symbol_rate(fe, srate, ratio);230}231 232static int stv0299_get_symbolrate (struct stv0299_state* state)233{234 u32 Mclk = state->config->mclk / 4096L;235 u32 srate;236 s32 offset;237 u8 sfr[3];238 s8 rtf;239 240 dprintk ("%s\n", __func__);241 242 stv0299_readregs (state, 0x1f, sfr, 3);243 stv0299_readregs (state, 0x1a, (u8 *)&rtf, 1);244 245 srate = (sfr[0] << 8) | sfr[1];246 srate *= Mclk;247 srate /= 16;248 srate += (sfr[2] >> 4) * Mclk / 256;249 offset = (s32) rtf * (srate / 4096L);250 offset /= 128;251 252 dprintk ("%s : srate = %i\n", __func__, srate);253 dprintk ("%s : ofset = %i\n", __func__, offset);254 255 srate += offset;256 257 srate += 1000;258 srate /= 2000;259 srate *= 2000;260 261 return srate;262}263 264static int stv0299_send_diseqc_msg (struct dvb_frontend* fe,265 struct dvb_diseqc_master_cmd *m)266{267 struct stv0299_state* state = fe->demodulator_priv;268 u8 val;269 int i;270 271 dprintk ("%s\n", __func__);272 273 if (stv0299_wait_diseqc_idle (state, 100) < 0)274 return -ETIMEDOUT;275 276 val = stv0299_readreg (state, 0x08);277 278 if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x6)) /* DiSEqC mode */279 return -EREMOTEIO;280 281 for (i=0; i<m->msg_len; i++) {282 if (stv0299_wait_diseqc_fifo (state, 100) < 0)283 return -ETIMEDOUT;284 285 if (stv0299_writeregI (state, 0x09, m->msg[i]))286 return -EREMOTEIO;287 }288 289 if (stv0299_wait_diseqc_idle (state, 100) < 0)290 return -ETIMEDOUT;291 292 return 0;293}294 295static int stv0299_send_diseqc_burst(struct dvb_frontend *fe,296 enum fe_sec_mini_cmd burst)297{298 struct stv0299_state* state = fe->demodulator_priv;299 u8 val;300 301 dprintk ("%s\n", __func__);302 303 if (stv0299_wait_diseqc_idle (state, 100) < 0)304 return -ETIMEDOUT;305 306 val = stv0299_readreg (state, 0x08);307 308 if (stv0299_writeregI (state, 0x08, (val & ~0x7) | 0x2)) /* burst mode */309 return -EREMOTEIO;310 311 if (stv0299_writeregI (state, 0x09, burst == SEC_MINI_A ? 0x00 : 0xff))312 return -EREMOTEIO;313 314 if (stv0299_wait_diseqc_idle (state, 100) < 0)315 return -ETIMEDOUT;316 317 if (stv0299_writeregI (state, 0x08, val))318 return -EREMOTEIO;319 320 return 0;321}322 323static int stv0299_set_tone(struct dvb_frontend *fe,324 enum fe_sec_tone_mode tone)325{326 struct stv0299_state* state = fe->demodulator_priv;327 u8 val;328 329 if (stv0299_wait_diseqc_idle (state, 100) < 0)330 return -ETIMEDOUT;331 332 val = stv0299_readreg (state, 0x08);333 334 switch (tone) {335 case SEC_TONE_ON:336 return stv0299_writeregI (state, 0x08, val | 0x3);337 338 case SEC_TONE_OFF:339 return stv0299_writeregI (state, 0x08, (val & ~0x3) | 0x02);340 341 default:342 return -EINVAL;343 }344}345 346static int stv0299_set_voltage(struct dvb_frontend *fe,347 enum fe_sec_voltage voltage)348{349 struct stv0299_state* state = fe->demodulator_priv;350 u8 reg0x08;351 u8 reg0x0c;352 353 dprintk("%s: %s\n", __func__,354 voltage == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :355 voltage == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");356 357 reg0x08 = stv0299_readreg (state, 0x08);358 reg0x0c = stv0299_readreg (state, 0x0c);359 360 /*361 * H/V switching over OP0, OP1 and OP2 are LNB power enable bits362 */363 reg0x0c &= 0x0f;364 reg0x08 = (reg0x08 & 0x3f) | (state->config->lock_output << 6);365 366 switch (voltage) {367 case SEC_VOLTAGE_13:368 if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)369 reg0x0c |= 0x10; /* OP1 off, OP0 on */370 else371 reg0x0c |= 0x40; /* OP1 on, OP0 off */372 break;373 case SEC_VOLTAGE_18:374 reg0x0c |= 0x50; /* OP1 on, OP0 on */375 break;376 case SEC_VOLTAGE_OFF:377 /* LNB power off! */378 reg0x08 = 0x00;379 reg0x0c = 0x00;380 break;381 default:382 return -EINVAL;383 }384 385 if (state->config->op0_off)386 reg0x0c &= ~0x10;387 388 stv0299_writeregI(state, 0x08, reg0x08);389 return stv0299_writeregI(state, 0x0c, reg0x0c);390}391 392static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long cmd)393{394 struct stv0299_state* state = fe->demodulator_priv;395 u8 reg0x08;396 u8 reg0x0c;397 u8 lv_mask = 0x40;398 u8 last = 1;399 int i;400 ktime_t nexttime;401 ktime_t tv[10];402 403 reg0x08 = stv0299_readreg (state, 0x08);404 reg0x0c = stv0299_readreg (state, 0x0c);405 reg0x0c &= 0x0f;406 stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));407 if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)408 lv_mask = 0x10;409 410 cmd = cmd << 1;411 if (debug_legacy_dish_switch)412 printk ("%s switch command: 0x%04lx\n",__func__, cmd);413 414 nexttime = ktime_get_boottime();415 if (debug_legacy_dish_switch)416 tv[0] = nexttime;417 stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */418 419 dvb_frontend_sleep_until(&nexttime, 32000);420 421 for (i=0; i<9; i++) {422 if (debug_legacy_dish_switch)423 tv[i+1] = ktime_get_boottime();424 if((cmd & 0x01) != last) {425 /* set voltage to (last ? 13V : 18V) */426 stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));427 last = (last) ? 0 : 1;428 }429 430 cmd = cmd >> 1;431 432 if (i != 8)433 dvb_frontend_sleep_until(&nexttime, 8000);434 }435 if (debug_legacy_dish_switch) {436 printk ("%s(%d): switch delay (should be 32k followed by all 8k\n",437 __func__, fe->dvb->num);438 for (i = 1; i < 10; i++)439 printk("%d: %d\n", i,440 (int) ktime_us_delta(tv[i], tv[i-1]));441 }442 443 return 0;444}445 446static int stv0299_init (struct dvb_frontend* fe)447{448 struct stv0299_state* state = fe->demodulator_priv;449 int i;450 u8 reg;451 u8 val;452 453 dprintk("stv0299: init chip\n");454 455 stv0299_writeregI(state, 0x02, 0x30 | state->mcr_reg);456 msleep(50);457 458 for (i = 0; ; i += 2) {459 reg = state->config->inittab[i];460 val = state->config->inittab[i+1];461 if (reg == 0xff && val == 0xff)462 break;463 if (reg == 0x0c && state->config->op0_off)464 val &= ~0x10;465 if (reg == 0x2)466 state->mcr_reg = val & 0xf;467 stv0299_writeregI(state, reg, val);468 }469 470 return 0;471}472 473static int stv0299_read_status(struct dvb_frontend *fe,474 enum fe_status *status)475{476 struct stv0299_state* state = fe->demodulator_priv;477 478 u8 signal = 0xff - stv0299_readreg (state, 0x18);479 u8 sync = stv0299_readreg (state, 0x1b);480 481 dprintk ("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);482 *status = 0;483 484 if (signal > 10)485 *status |= FE_HAS_SIGNAL;486 487 if (sync & 0x80)488 *status |= FE_HAS_CARRIER;489 490 if (sync & 0x10)491 *status |= FE_HAS_VITERBI;492 493 if (sync & 0x08)494 *status |= FE_HAS_SYNC;495 496 if ((sync & 0x98) == 0x98)497 *status |= FE_HAS_LOCK;498 499 return 0;500}501 502static int stv0299_read_ber(struct dvb_frontend* fe, u32* ber)503{504 struct stv0299_state* state = fe->demodulator_priv;505 506 if (state->errmode != STATUS_BER)507 return -ENOSYS;508 509 *ber = stv0299_readreg(state, 0x1e) | (stv0299_readreg(state, 0x1d) << 8);510 511 return 0;512}513 514static int stv0299_read_signal_strength(struct dvb_frontend* fe, u16* strength)515{516 struct stv0299_state* state = fe->demodulator_priv;517 518 s32 signal = 0xffff - ((stv0299_readreg (state, 0x18) << 8)519 | stv0299_readreg (state, 0x19));520 521 dprintk ("%s : FE_READ_SIGNAL_STRENGTH : AGC2I: 0x%02x%02x, signal=0x%04x\n", __func__,522 stv0299_readreg (state, 0x18),523 stv0299_readreg (state, 0x19), (int) signal);524 525 signal = signal * 5 / 4;526 *strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;527 528 return 0;529}530 531static int stv0299_read_snr(struct dvb_frontend* fe, u16* snr)532{533 struct stv0299_state* state = fe->demodulator_priv;534 535 s32 xsnr = 0xffff - ((stv0299_readreg (state, 0x24) << 8)536 | stv0299_readreg (state, 0x25));537 xsnr = 3 * (xsnr - 0xa100);538 *snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;539 540 return 0;541}542 543static int stv0299_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)544{545 struct stv0299_state* state = fe->demodulator_priv;546 547 if (state->errmode != STATUS_UCBLOCKS)548 return -ENOSYS;549 550 state->ucblocks += stv0299_readreg(state, 0x1e);551 state->ucblocks += (stv0299_readreg(state, 0x1d) << 8);552 *ucblocks = state->ucblocks;553 554 return 0;555}556 557static int stv0299_set_frontend(struct dvb_frontend *fe)558{559 struct dtv_frontend_properties *p = &fe->dtv_property_cache;560 struct stv0299_state* state = fe->demodulator_priv;561 int invval = 0;562 563 dprintk ("%s : FE_SET_FRONTEND\n", __func__);564 if (state->config->set_ts_params)565 state->config->set_ts_params(fe, 0);566 567 // set the inversion568 if (p->inversion == INVERSION_OFF) invval = 0;569 else if (p->inversion == INVERSION_ON) invval = 1;570 else {571 printk("stv0299 does not support auto-inversion\n");572 return -EINVAL;573 }574 if (state->config->invert) invval = (~invval) & 1;575 stv0299_writeregI(state, 0x0c, (stv0299_readreg(state, 0x0c) & 0xfe) | invval);576 577 if (fe->ops.tuner_ops.set_params) {578 fe->ops.tuner_ops.set_params(fe);579 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);580 }581 582 stv0299_set_FEC(state, p->fec_inner);583 stv0299_set_symbolrate(fe, p->symbol_rate);584 stv0299_writeregI(state, 0x22, 0x00);585 stv0299_writeregI(state, 0x23, 0x00);586 587 state->tuner_frequency = p->frequency;588 state->fec_inner = p->fec_inner;589 state->symbol_rate = p->symbol_rate;590 591 return 0;592}593 594static int stv0299_get_frontend(struct dvb_frontend *fe,595 struct dtv_frontend_properties *p)596{597 struct stv0299_state* state = fe->demodulator_priv;598 s32 derot_freq;599 int invval;600 601 derot_freq = (s32)(s16) ((stv0299_readreg (state, 0x22) << 8)602 | stv0299_readreg (state, 0x23));603 604 derot_freq *= (state->config->mclk >> 16);605 derot_freq += 500;606 derot_freq /= 1000;607 608 p->frequency += derot_freq;609 610 invval = stv0299_readreg (state, 0x0c) & 1;611 if (state->config->invert) invval = (~invval) & 1;612 p->inversion = invval ? INVERSION_ON : INVERSION_OFF;613 614 p->fec_inner = stv0299_get_fec(state);615 p->symbol_rate = stv0299_get_symbolrate(state);616 617 return 0;618}619 620static int stv0299_sleep(struct dvb_frontend* fe)621{622 struct stv0299_state* state = fe->demodulator_priv;623 624 stv0299_writeregI(state, 0x02, 0xb0 | state->mcr_reg);625 state->initialised = 0;626 627 return 0;628}629 630static int stv0299_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)631{632 struct stv0299_state* state = fe->demodulator_priv;633 634 if (enable) {635 stv0299_writeregI(state, 0x05, 0xb5);636 } else {637 stv0299_writeregI(state, 0x05, 0x35);638 }639 udelay(1);640 return 0;641}642 643static int stv0299_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)644{645 struct stv0299_state* state = fe->demodulator_priv;646 struct dtv_frontend_properties *p = &fe->dtv_property_cache;647 648 fesettings->min_delay_ms = state->config->min_delay_ms;649 if (p->symbol_rate < 10000000) {650 fesettings->step_size = p->symbol_rate / 32000;651 fesettings->max_drift = 5000;652 } else {653 fesettings->step_size = p->symbol_rate / 16000;654 fesettings->max_drift = p->symbol_rate / 2000;655 }656 return 0;657}658 659static void stv0299_release(struct dvb_frontend* fe)660{661 struct stv0299_state* state = fe->demodulator_priv;662 kfree(state);663}664 665static const struct dvb_frontend_ops stv0299_ops;666 667struct dvb_frontend* stv0299_attach(const struct stv0299_config* config,668 struct i2c_adapter* i2c)669{670 struct stv0299_state* state = NULL;671 int id;672 673 /* allocate memory for the internal state */674 state = kzalloc(sizeof(struct stv0299_state), GFP_KERNEL);675 if (state == NULL) goto error;676 677 /* setup the state */678 state->config = config;679 state->i2c = i2c;680 state->initialised = 0;681 state->tuner_frequency = 0;682 state->symbol_rate = 0;683 state->fec_inner = 0;684 state->errmode = STATUS_BER;685 686 /* check if the demod is there */687 stv0299_writeregI(state, 0x02, 0x30); /* standby off */688 msleep(200);689 id = stv0299_readreg(state, 0x00);690 691 /* register 0x00 contains 0xa1 for STV0299 and STV0299B */692 /* register 0x00 might contain 0x80 when returning from standby */693 if (id != 0xa1 && id != 0x80) goto error;694 695 /* create dvb_frontend */696 memcpy(&state->frontend.ops, &stv0299_ops, sizeof(struct dvb_frontend_ops));697 state->frontend.demodulator_priv = state;698 return &state->frontend;699 700error:701 kfree(state);702 return NULL;703}704 705static const struct dvb_frontend_ops stv0299_ops = {706 .delsys = { SYS_DVBS },707 .info = {708 .name = "ST STV0299 DVB-S",709 .frequency_min_hz = 950 * MHz,710 .frequency_max_hz = 2150 * MHz,711 .frequency_stepsize_hz = 125 * kHz,712 .symbol_rate_min = 1000000,713 .symbol_rate_max = 45000000,714 .symbol_rate_tolerance = 500, /* ppm */715 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |716 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |717 FE_CAN_QPSK |718 FE_CAN_FEC_AUTO719 },720 721 .release = stv0299_release,722 723 .init = stv0299_init,724 .sleep = stv0299_sleep,725 .write = stv0299_write,726 .i2c_gate_ctrl = stv0299_i2c_gate_ctrl,727 728 .set_frontend = stv0299_set_frontend,729 .get_frontend = stv0299_get_frontend,730 .get_tune_settings = stv0299_get_tune_settings,731 732 .read_status = stv0299_read_status,733 .read_ber = stv0299_read_ber,734 .read_signal_strength = stv0299_read_signal_strength,735 .read_snr = stv0299_read_snr,736 .read_ucblocks = stv0299_read_ucblocks,737 738 .diseqc_send_master_cmd = stv0299_send_diseqc_msg,739 .diseqc_send_burst = stv0299_send_diseqc_burst,740 .set_tone = stv0299_set_tone,741 .set_voltage = stv0299_set_voltage,742 .dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd,743};744 745module_param(debug_legacy_dish_switch, int, 0444);746MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches");747 748module_param(debug, int, 0644);749MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");750 751MODULE_DESCRIPTION("ST STV0299 DVB Demodulator driver");752MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Peter Schildmann, Felix Domke, Andreas Oberritter, Andrew de Quincey, Kenneth Aafly");753MODULE_LICENSE("GPL");754 755EXPORT_SYMBOL_GPL(stv0299_attach);756