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kernel-fxtec-pro1x/drivers/media/dvb/frontends/dvb-pll.c
Chris Pascoe c162dff643 V4L/DVB (4436): Dvb-pll support for MT352/ZL10353 based tuners. 
Typical wiring of MT352 and ZL10353 based tuners differs from dvb-pll's
expectation that the PLL is directly accessible.  On these boards, the
PLL is actually hidden behind the demodulator, and as such can only be
accessed via the demodulator's interface.  It was failing to communicate
with the PLL during an attach test and subsequently not connecting the
tuner ops.
By passing a NULL I2C bus handle to dvb_pll_attach, this accessibility
check can be bypassed.  Do this for the affected boards.  Also fix a
possible NULL dereference at sleep time, which would otherwise be
exposed by this change.

Signed-off-by: Chris Pascoe <c.pascoe@itee.uq.edu.au>
Acked-by: Andrew de Quincey <adq_dvb@lidskialf.net>
Acked-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2006-09-26 11:53:38 -03:00

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/*
* descriptions + helper functions for simple dvb plls.
*
* (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
*
* 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.
*/
#include <linux/module.h>
#include <linux/dvb/frontend.h>
#include <asm/types.h>
#include "dvb-pll.h"
/* ----------------------------------------------------------- */
/* descriptions */
struct dvb_pll_desc dvb_pll_thomson_dtt7579 = {
.name = "Thomson dtt7579",
.min = 177000000,
.max = 858000000,
.count = 5,
.entries = {
{ 0, 36166667, 166666, 0xb4, 0x03 }, /* go sleep */
{ 443250000, 36166667, 166666, 0xb4, 0x02 },
{ 542000000, 36166667, 166666, 0xb4, 0x08 },
{ 771000000, 36166667, 166666, 0xbc, 0x08 },
{ 999999999, 36166667, 166666, 0xf4, 0x08 },
},
};
EXPORT_SYMBOL(dvb_pll_thomson_dtt7579);
struct dvb_pll_desc dvb_pll_thomson_dtt7610 = {
.name = "Thomson dtt7610",
.min = 44000000,
.max = 958000000,
.count = 3,
.entries = {
{ 157250000, 44000000, 62500, 0x8e, 0x39 },
{ 454000000, 44000000, 62500, 0x8e, 0x3a },
{ 999999999, 44000000, 62500, 0x8e, 0x3c },
},
};
EXPORT_SYMBOL(dvb_pll_thomson_dtt7610);
static void thomson_dtt759x_bw(u8 *buf, u32 freq, int bandwidth)
{
if (BANDWIDTH_7_MHZ == bandwidth)
buf[3] |= 0x10;
}
struct dvb_pll_desc dvb_pll_thomson_dtt759x = {
.name = "Thomson dtt759x",
.min = 177000000,
.max = 896000000,
.setbw = thomson_dtt759x_bw,
.count = 6,
.entries = {
{ 0, 36166667, 166666, 0x84, 0x03 },
{ 264000000, 36166667, 166666, 0xb4, 0x02 },
{ 470000000, 36166667, 166666, 0xbc, 0x02 },
{ 735000000, 36166667, 166666, 0xbc, 0x08 },
{ 835000000, 36166667, 166666, 0xf4, 0x08 },
{ 999999999, 36166667, 166666, 0xfc, 0x08 },
},
};
EXPORT_SYMBOL(dvb_pll_thomson_dtt759x);
struct dvb_pll_desc dvb_pll_lg_z201 = {
.name = "LG z201",
.min = 174000000,
.max = 862000000,
.count = 6,
.entries = {
{ 0, 36166667, 166666, 0xbc, 0x03 },
{ 157500000, 36166667, 166666, 0xbc, 0x01 },
{ 443250000, 36166667, 166666, 0xbc, 0x02 },
{ 542000000, 36166667, 166666, 0xbc, 0x04 },
{ 830000000, 36166667, 166666, 0xf4, 0x04 },
{ 999999999, 36166667, 166666, 0xfc, 0x04 },
},
};
EXPORT_SYMBOL(dvb_pll_lg_z201);
struct dvb_pll_desc dvb_pll_microtune_4042 = {
.name = "Microtune 4042 FI5",
.min = 57000000,
.max = 858000000,
.count = 3,
.entries = {
{ 162000000, 44000000, 62500, 0x8e, 0xa1 },
{ 457000000, 44000000, 62500, 0x8e, 0x91 },
{ 999999999, 44000000, 62500, 0x8e, 0x31 },
},
};
EXPORT_SYMBOL(dvb_pll_microtune_4042);
struct dvb_pll_desc dvb_pll_thomson_dtt761x = {
/* DTT 7611 7611A 7612 7613 7613A 7614 7615 7615A */
.name = "Thomson dtt761x",
.min = 57000000,
.max = 863000000,
.count = 3,
.entries = {
{ 147000000, 44000000, 62500, 0x8e, 0x39 },
{ 417000000, 44000000, 62500, 0x8e, 0x3a },
{ 999999999, 44000000, 62500, 0x8e, 0x3c },
},
};
EXPORT_SYMBOL(dvb_pll_thomson_dtt761x);
struct dvb_pll_desc dvb_pll_unknown_1 = {
.name = "unknown 1", /* used by dntv live dvb-t */
.min = 174000000,
.max = 862000000,
.count = 9,
.entries = {
{ 150000000, 36166667, 166666, 0xb4, 0x01 },
{ 173000000, 36166667, 166666, 0xbc, 0x01 },
{ 250000000, 36166667, 166666, 0xb4, 0x02 },
{ 400000000, 36166667, 166666, 0xbc, 0x02 },
{ 420000000, 36166667, 166666, 0xf4, 0x02 },
{ 470000000, 36166667, 166666, 0xfc, 0x02 },
{ 600000000, 36166667, 166666, 0xbc, 0x08 },
{ 730000000, 36166667, 166666, 0xf4, 0x08 },
{ 999999999, 36166667, 166666, 0xfc, 0x08 },
},
};
EXPORT_SYMBOL(dvb_pll_unknown_1);
/* Infineon TUA6010XS
* used in Thomson Cable Tuner
*/
struct dvb_pll_desc dvb_pll_tua6010xs = {
.name = "Infineon TUA6010XS",
.min = 44250000,
.max = 858000000,
.count = 3,
.entries = {
{ 115750000, 36125000, 62500, 0x8e, 0x03 },
{ 403250000, 36125000, 62500, 0x8e, 0x06 },
{ 999999999, 36125000, 62500, 0x8e, 0x85 },
},
};
EXPORT_SYMBOL(dvb_pll_tua6010xs);
/* Panasonic env57h1xd5 (some Philips PLL ?) */
struct dvb_pll_desc dvb_pll_env57h1xd5 = {
.name = "Panasonic ENV57H1XD5",
.min = 44250000,
.max = 858000000,
.count = 4,
.entries = {
{ 153000000, 36291666, 166666, 0xc2, 0x41 },
{ 470000000, 36291666, 166666, 0xc2, 0x42 },
{ 526000000, 36291666, 166666, 0xc2, 0x84 },
{ 999999999, 36291666, 166666, 0xc2, 0xa4 },
},
};
EXPORT_SYMBOL(dvb_pll_env57h1xd5);
/* Philips TDA6650/TDA6651
* used in Panasonic ENV77H11D5
*/
static void tda665x_bw(u8 *buf, u32 freq, int bandwidth)
{
if (bandwidth == BANDWIDTH_8_MHZ)
buf[3] |= 0x08;
}
struct dvb_pll_desc dvb_pll_tda665x = {
.name = "Philips TDA6650/TDA6651",
.min = 44250000,
.max = 858000000,
.setbw = tda665x_bw,
.count = 12,
.entries = {
{ 93834000, 36249333, 166667, 0xca, 0x61 /* 011 0 0 0 01 */ },
{ 123834000, 36249333, 166667, 0xca, 0xa1 /* 101 0 0 0 01 */ },
{ 161000000, 36249333, 166667, 0xca, 0xa1 /* 101 0 0 0 01 */ },
{ 163834000, 36249333, 166667, 0xca, 0xc2 /* 110 0 0 0 10 */ },
{ 253834000, 36249333, 166667, 0xca, 0x62 /* 011 0 0 0 10 */ },
{ 383834000, 36249333, 166667, 0xca, 0xa2 /* 101 0 0 0 10 */ },
{ 443834000, 36249333, 166667, 0xca, 0xc2 /* 110 0 0 0 10 */ },
{ 444000000, 36249333, 166667, 0xca, 0xc4 /* 110 0 0 1 00 */ },
{ 583834000, 36249333, 166667, 0xca, 0x64 /* 011 0 0 1 00 */ },
{ 793834000, 36249333, 166667, 0xca, 0xa4 /* 101 0 0 1 00 */ },
{ 444834000, 36249333, 166667, 0xca, 0xc4 /* 110 0 0 1 00 */ },
{ 861000000, 36249333, 166667, 0xca, 0xe4 /* 111 0 0 1 00 */ },
}
};
EXPORT_SYMBOL(dvb_pll_tda665x);
/* Infineon TUA6034
* used in LG TDTP E102P
*/
static void tua6034_bw(u8 *buf, u32 freq, int bandwidth)
{
if (BANDWIDTH_7_MHZ != bandwidth)
buf[3] |= 0x08;
}
struct dvb_pll_desc dvb_pll_tua6034 = {
.name = "Infineon TUA6034",
.min = 44250000,
.max = 858000000,
.count = 3,
.setbw = tua6034_bw,
.entries = {
{ 174500000, 36166667, 62500, 0xce, 0x01 },
{ 230000000, 36166667, 62500, 0xce, 0x02 },
{ 999999999, 36166667, 62500, 0xce, 0x04 },
},
};
EXPORT_SYMBOL(dvb_pll_tua6034);
/* Infineon TUA6034
* used in LG TDVS-H061F, LG TDVS-H062F and LG TDVS-H064F
*/
struct dvb_pll_desc dvb_pll_lg_tdvs_h06xf = {
.name = "LG TDVS-H06xF",
.min = 54000000,
.max = 863000000,
.count = 3,
.entries = {
{ 165000000, 44000000, 62500, 0xce, 0x01 },
{ 450000000, 44000000, 62500, 0xce, 0x02 },
{ 999999999, 44000000, 62500, 0xce, 0x04 },
},
};
EXPORT_SYMBOL(dvb_pll_lg_tdvs_h06xf);
/* Philips FMD1216ME
* used in Medion Hybrid PCMCIA card and USB Box
*/
static void fmd1216me_bw(u8 *buf, u32 freq, int bandwidth)
{
if (bandwidth == BANDWIDTH_8_MHZ && freq >= 158870000)
buf[3] |= 0x08;
}
struct dvb_pll_desc dvb_pll_fmd1216me = {
.name = "Philips FMD1216ME",
.min = 50870000,
.max = 858000000,
.setbw = fmd1216me_bw,
.count = 7,
.entries = {
{ 143870000, 36213333, 166667, 0xbc, 0x41 },
{ 158870000, 36213333, 166667, 0xf4, 0x41 },
{ 329870000, 36213333, 166667, 0xbc, 0x42 },
{ 441870000, 36213333, 166667, 0xf4, 0x42 },
{ 625870000, 36213333, 166667, 0xbc, 0x44 },
{ 803870000, 36213333, 166667, 0xf4, 0x44 },
{ 999999999, 36213333, 166667, 0xfc, 0x44 },
}
};
EXPORT_SYMBOL(dvb_pll_fmd1216me);
/* ALPS TDED4
* used in Nebula-Cards and USB boxes
*/
static void tded4_bw(u8 *buf, u32 freq, int bandwidth)
{
if (bandwidth == BANDWIDTH_8_MHZ)
buf[3] |= 0x04;
}
struct dvb_pll_desc dvb_pll_tded4 = {
.name = "ALPS TDED4",
.min = 47000000,
.max = 863000000,
.setbw = tded4_bw,
.count = 4,
.entries = {
{ 153000000, 36166667, 166667, 0x85, 0x01 },
{ 470000000, 36166667, 166667, 0x85, 0x02 },
{ 823000000, 36166667, 166667, 0x85, 0x08 },
{ 999999999, 36166667, 166667, 0x85, 0x88 },
}
};
EXPORT_SYMBOL(dvb_pll_tded4);
/* ALPS TDHU2
* used in AverTVHD MCE A180
*/
struct dvb_pll_desc dvb_pll_tdhu2 = {
.name = "ALPS TDHU2",
.min = 54000000,
.max = 864000000,
.count = 4,
.entries = {
{ 162000000, 44000000, 62500, 0x85, 0x01 },
{ 426000000, 44000000, 62500, 0x85, 0x02 },
{ 782000000, 44000000, 62500, 0x85, 0x08 },
{ 999999999, 44000000, 62500, 0x85, 0x88 },
}
};
EXPORT_SYMBOL(dvb_pll_tdhu2);
/* Philips TUV1236D
* used in ATI HDTV Wonder
*/
struct dvb_pll_desc dvb_pll_tuv1236d = {
.name = "Philips TUV1236D",
.min = 54000000,
.max = 864000000,
.count = 3,
.entries = {
{ 157250000, 44000000, 62500, 0xc6, 0x41 },
{ 454000000, 44000000, 62500, 0xc6, 0x42 },
{ 999999999, 44000000, 62500, 0xc6, 0x44 },
},
};
EXPORT_SYMBOL(dvb_pll_tuv1236d);
/* Samsung TBMV30111IN / TBMV30712IN1
* used in Air2PC ATSC - 2nd generation (nxt2002)
*/
struct dvb_pll_desc dvb_pll_samsung_tbmv = {
.name = "Samsung TBMV30111IN / TBMV30712IN1",
.min = 54000000,
.max = 860000000,
.count = 6,
.entries = {
{ 172000000, 44000000, 166666, 0xb4, 0x01 },
{ 214000000, 44000000, 166666, 0xb4, 0x02 },
{ 467000000, 44000000, 166666, 0xbc, 0x02 },
{ 721000000, 44000000, 166666, 0xbc, 0x08 },
{ 841000000, 44000000, 166666, 0xf4, 0x08 },
{ 999999999, 44000000, 166666, 0xfc, 0x02 },
}
};
EXPORT_SYMBOL(dvb_pll_samsung_tbmv);
/*
* Philips SD1878 Tuner.
*/
struct dvb_pll_desc dvb_pll_philips_sd1878_tda8261 = {
.name = "Philips SD1878",
.min = 950000,
.max = 2150000,
.count = 4,
.entries = {
{ 1250000, 499, 500, 0xc4, 0x00},
{ 1550000, 499, 500, 0xc4, 0x40},
{ 2050000, 499, 500, 0xc4, 0x80},
{ 2150000, 499, 500, 0xc4, 0xc0},
},
};
EXPORT_SYMBOL(dvb_pll_philips_sd1878_tda8261);
/*
* Philips TD1316 Tuner.
*/
static void td1316_bw(u8 *buf, u32 freq, int bandwidth)
{
u8 band;
/* determine band */
if (freq < 161000000)
band = 1;
else if (freq < 444000000)
band = 2;
else
band = 4;
buf[3] |= band;
/* setup PLL filter */
if (bandwidth == BANDWIDTH_8_MHZ)
buf[3] |= 1 << 3;
}
struct dvb_pll_desc dvb_pll_philips_td1316 = {
.name = "Philips TD1316",
.min = 87000000,
.max = 895000000,
.setbw = td1316_bw,
.count = 9,
.entries = {
{ 93834000, 36166000, 166666, 0xca, 0x60},
{ 123834000, 36166000, 166666, 0xca, 0xa0},
{ 163834000, 36166000, 166666, 0xca, 0xc0},
{ 253834000, 36166000, 166666, 0xca, 0x60},
{ 383834000, 36166000, 166666, 0xca, 0xa0},
{ 443834000, 36166000, 166666, 0xca, 0xc0},
{ 583834000, 36166000, 166666, 0xca, 0x60},
{ 793834000, 36166000, 166666, 0xca, 0xa0},
{ 858834000, 36166000, 166666, 0xca, 0xe0},
},
};
EXPORT_SYMBOL(dvb_pll_philips_td1316);
/* FE6600 used on DViCO Hybrid */
struct dvb_pll_desc dvb_pll_thomson_fe6600 = {
.name = "Thomson FE6600",
.min = 44250000,
.max = 858000000,
.count = 4,
.entries = {
{ 250000000, 36213333, 166667, 0xb4, 0x12 },
{ 455000000, 36213333, 166667, 0xfe, 0x11 },
{ 775500000, 36213333, 166667, 0xbc, 0x18 },
{ 999999999, 36213333, 166667, 0xf4, 0x18 },
}
};
EXPORT_SYMBOL(dvb_pll_thomson_fe6600);
struct dvb_pll_priv {
/* i2c details */
int pll_i2c_address;
struct i2c_adapter *i2c;
/* the PLL descriptor */
struct dvb_pll_desc *pll_desc;
/* cached frequency/bandwidth */
u32 frequency;
u32 bandwidth;
};
/* ----------------------------------------------------------- */
/* code */
static int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");
int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf,
u32 freq, int bandwidth)
{
u32 div;
int i;
if (freq != 0 && (freq < desc->min || freq > desc->max))
return -EINVAL;
for (i = 0; i < desc->count; i++) {
if (freq > desc->entries[i].limit)
continue;
break;
}
if (debug)
printk("pll: %s: freq=%d bw=%d | i=%d/%d\n",
desc->name, freq, bandwidth, i, desc->count);
if (i == desc->count)
return -EINVAL;
div = (freq + desc->entries[i].offset) / desc->entries[i].stepsize;
buf[0] = div >> 8;
buf[1] = div & 0xff;
buf[2] = desc->entries[i].config;
buf[3] = desc->entries[i].cb;
if (desc->setbw)
desc->setbw(buf, freq, bandwidth);
if (debug)
printk("pll: %s: div=%d | buf=0x%02x,0x%02x,0x%02x,0x%02x\n",
desc->name, div, buf[0], buf[1], buf[2], buf[3]);
return 0;
}
EXPORT_SYMBOL(dvb_pll_configure);
static int dvb_pll_release(struct dvb_frontend *fe)
{
if (fe->tuner_priv)
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
return 0;
}
static int dvb_pll_sleep(struct dvb_frontend *fe)
{
struct dvb_pll_priv *priv = fe->tuner_priv;
u8 buf[4];
struct i2c_msg msg =
{ .addr = priv->pll_i2c_address, .flags = 0, .buf = buf, .len = sizeof(buf) };
int i;
int result;
if (priv->i2c == NULL)
return -EINVAL;
for (i = 0; i < priv->pll_desc->count; i++) {
if (priv->pll_desc->entries[i].limit == 0)
break;
}
if (i == priv->pll_desc->count)
return 0;
buf[0] = 0;
buf[1] = 0;
buf[2] = priv->pll_desc->entries[i].config;
buf[3] = priv->pll_desc->entries[i].cb;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
return result;
}
return 0;
}
static int dvb_pll_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params)
{
struct dvb_pll_priv *priv = fe->tuner_priv;
u8 buf[4];
struct i2c_msg msg =
{ .addr = priv->pll_i2c_address, .flags = 0, .buf = buf, .len = sizeof(buf) };
int result;
u32 div;
int i;
u32 bandwidth = 0;
if (priv->i2c == NULL)
return -EINVAL;
// DVBT bandwidth only just now
if (fe->ops.info.type == FE_OFDM) {
bandwidth = params->u.ofdm.bandwidth;
}
if ((result = dvb_pll_configure(priv->pll_desc, buf, params->frequency, bandwidth)) != 0)
return result;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
return result;
}
// calculate the frequency we set it to
for (i = 0; i < priv->pll_desc->count; i++) {
if (params->frequency > priv->pll_desc->entries[i].limit)
continue;
break;
}
div = (params->frequency + priv->pll_desc->entries[i].offset) / priv->pll_desc->entries[i].stepsize;
priv->frequency = (div * priv->pll_desc->entries[i].stepsize) - priv->pll_desc->entries[i].offset;
priv->bandwidth = bandwidth;
return 0;
}
static int dvb_pll_calc_regs(struct dvb_frontend *fe, struct dvb_frontend_parameters *params, u8 *buf, int buf_len)
{
struct dvb_pll_priv *priv = fe->tuner_priv;
int result;
u32 div;
int i;
u32 bandwidth = 0;
if (buf_len < 5)
return -EINVAL;
// DVBT bandwidth only just now
if (fe->ops.info.type == FE_OFDM) {
bandwidth = params->u.ofdm.bandwidth;
}
if ((result = dvb_pll_configure(priv->pll_desc, buf+1, params->frequency, bandwidth)) != 0)
return result;
buf[0] = priv->pll_i2c_address;
// calculate the frequency we set it to
for (i = 0; i < priv->pll_desc->count; i++) {
if (params->frequency > priv->pll_desc->entries[i].limit)
continue;
break;
}
div = (params->frequency + priv->pll_desc->entries[i].offset) / priv->pll_desc->entries[i].stepsize;
priv->frequency = (div * priv->pll_desc->entries[i].stepsize) - priv->pll_desc->entries[i].offset;
priv->bandwidth = bandwidth;
return 5;
}
static int dvb_pll_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct dvb_pll_priv *priv = fe->tuner_priv;
*frequency = priv->frequency;
return 0;
}
static int dvb_pll_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
struct dvb_pll_priv *priv = fe->tuner_priv;
*bandwidth = priv->bandwidth;
return 0;
}
static struct dvb_tuner_ops dvb_pll_tuner_ops = {
.release = dvb_pll_release,
.sleep = dvb_pll_sleep,
.set_params = dvb_pll_set_params,
.calc_regs = dvb_pll_calc_regs,
.get_frequency = dvb_pll_get_frequency,
.get_bandwidth = dvb_pll_get_bandwidth,
};
struct dvb_frontend *dvb_pll_attach(struct dvb_frontend *fe, int pll_addr, struct i2c_adapter *i2c, struct dvb_pll_desc *desc)
{
u8 b1 [] = { 0 };
struct i2c_msg msg = { .addr = pll_addr, .flags = I2C_M_RD, .buf = b1, .len = 1 };
struct dvb_pll_priv *priv = NULL;
int ret;
if (i2c != NULL) {
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
ret = i2c_transfer (i2c, &msg, 1);
if (ret != 1)
return NULL;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
}
priv = kzalloc(sizeof(struct dvb_pll_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;
priv->pll_i2c_address = pll_addr;
priv->i2c = i2c;
priv->pll_desc = desc;
memcpy(&fe->ops.tuner_ops, &dvb_pll_tuner_ops, sizeof(struct dvb_tuner_ops));
strncpy(fe->ops.tuner_ops.info.name, desc->name, 128);
fe->ops.tuner_ops.info.frequency_min = desc->min;
fe->ops.tuner_ops.info.frequency_min = desc->max;
fe->tuner_priv = priv;
return fe;
}
EXPORT_SYMBOL(dvb_pll_attach);
MODULE_DESCRIPTION("dvb pll library");
MODULE_AUTHOR("Gerd Knorr");
MODULE_LICENSE("GPL");
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