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yaml
---
r: 124039
b: refs/heads/master
c: 0036020
h: refs/heads/master
i:
  124037: 91ecced
  124035: e79494c
  124031: 4259ab0
v: v3
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Manu Abraham authored and Mauro Carvalho Chehab committed Dec 29, 2008
1 parent c447160 commit 94571cc
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2 changes: 1 addition & 1 deletion [refs]
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---
refs/heads/master: 43498ade8ade7cee1b983e5410c838ac84eef691
refs/heads/master: 00360205b94cb9d0b93be5f4ca6676b53dceba7f
217 changes: 217 additions & 0 deletions trunk/drivers/media/dvb/frontends/tda8261.c
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/*
TDA8261 8PSK/QPSK tuner driver
Copyright (C) Manu Abraham (abraham.manu@gmail.com)
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/init.h>
#include <linux/kernel.h>
#include <linux/module.h>

#include "dvb_frontend.h"
#include "tda8261.h"

struct tda8261_state {
struct dvb_frontend *fe;
struct i2c_adapter *i2c;
struct tda8261_config *config;

/* state cache */
u32 frequency;
u32 bandwidth;
};

static int tda8261_read(struct tda8261_state *state, u8 *buf)
{
struct tda8261_config *config = state->config;
int err = 0;
struct i2c_msg msg[] = {
{ .addr = config->addr, .flags = 0, .buf = NULL, .len = 0 },
{ .addr = config->addr, .flags = I2C_M_RD,.buf = buf, .len = 1 }
};

if ((err = i2c_transfer(state->i2c, msg, 2)) != 2)
printk("%s: read error, err=%d\n", __func__, err);

return err;
}

static int tda8261_write(struct tda8261_state *state, u8 *buf)
{
struct tda8261_config *config = state->config;
int err = 0;
struct i2c_msg msg = { .addr = config->addr, .flags = 0, .buf = buf, .len = 4 };

if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1)
printk("%s: read error, err=%d\n", __func__, err);

return err;
}

static int tda8261_get_status(struct dvb_frontend *fe, u32 *status)
{
struct tda8261_state *state = fe->tuner_priv;
u8 result = 0;
int err = 0;

if ((err = tda8261_read(state, &result)) < 0) {
printk("%s: I/O Error\n", __func__);
return err;
}
if ((result >> 6) & 0x01) {
printk("%s: Tuner Phase Locked\n", __func__);
*status = 1;
}

return err;
}

static const u32 div_tab[] = { 2000, 1000, 500, 250, 125 }; /* kHz */
static const u8 ref_div[] = { 0x00, 0x01, 0x02, 0x05, 0x07 };

static int tda8261_get_state(struct dvb_frontend *fe,
enum tuner_param param,
struct tuner_state *tstate)
{
struct tda8261_state *state = fe->tuner_priv;
int err = 0;

switch (param) {
case DVBFE_TUNER_FREQUENCY:
tstate->frequency = state->frequency;
break;
case DVBFE_TUNER_BANDWIDTH:
tstate->bandwidth = 60000000; /* FIXME! need to calculate Bandwidth */
break;
default:
printk("%s: Unknown parameter (param=%d)\n", __func__, param);
err = -EINVAL;
break;
}

return err;
}

static int tda8261_set_state(struct dvb_frontend *fe,
enum tuner_param param,
struct tuner_state *tstate)
{
struct tda8261_state *state = fe->tuner_priv;
struct tda8261_config *config = state->config;
u32 frequency, N, status = 0;
u8 buf[4];
int err = 0;

if (param & DVBFE_TUNER_FREQUENCY) {
/**
* N = Max VCO Frequency / Channel Spacing
* Max VCO Frequency = VCO frequency + (channel spacing - 1)
* (to account for half channel spacing on either side)
*/
frequency = tstate->frequency;
N = (frequency + (div_tab[config->step_size] - 1)) / div_tab[config->step_size];
buf[0] = (N >> 8) & 0xff;
buf[1] = N & 0xff;
buf[2] = (0x08 << 4) | ((ref_div[config->step_size] & 0x07) << 1);
buf[3] = 0xc0;
/* Set params */
printk("%s: Frequency=%d, Sending[ %02x %02x %02x %02x ]\n",
__func__, frequency, buf[0], buf[1], buf[2], buf[3]);

if ((err = tda8261_write(state, buf)) < 0) {
printk("%s: I/O Error\n", __func__);
return err;
}
/* sleep for some time */
msleep(100);
/* check status */
if ((err = tda8261_get_status(fe, &status)) < 0) {
printk("%s: I/O Error\n", __func__);
return err;
}
if (status == 1)
printk("%s: Tuner Phase locked: status=%d\n", __func__, status);
else
printk("%s: No Phase lock: status=%d\n", __func__, status);
} else {
printk("%s: Unknown parameter (param=%d)\n", __func__, param);
return -EINVAL;
}

return 0;
}

static int tda8261_release(struct dvb_frontend *fe)
{
struct tda8261_state *state = fe->tuner_priv;

fe->tuner_priv = NULL;
kfree(state);
return 0;
}

static struct dvb_tuner_ops tda8261_ops = {

.info = {
.name = "TDA8261",
// .tuner_name = NULL,
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_step = 0
},

.set_state = tda8261_set_state,
.get_state = tda8261_get_state,
.release = tda8261_release
};

struct dvb_frontend *tda8261_attach(struct dvb_frontend *fe,
struct tda8261_config *config,
struct i2c_adapter *i2c)
{
struct tda8261_state *state = NULL;

if ((state = kzalloc(sizeof (struct tda8261_state), GFP_KERNEL)) == NULL)
goto exit;

state->config = config;
state->i2c = i2c;
state->fe = fe;
fe->tuner_priv = state;
fe->ops.tuner_ops = tda8261_ops;

fe->ops.tuner_ops.info.frequency_step = div_tab[config->step_size];
// fe->ops.tuner_ops.tuner_name = &config->buf;

// printk("%s: Attaching %s TDA8261 8PSK/QPSK tuner\n",
// __func__, fe->ops.tuner_ops.tuner_name);
printk("%s: Attaching TDA8261 8PSK/QPSK tuner\n", __func__);


return fe;

exit:
kfree(state);
return NULL;
}

EXPORT_SYMBOL(tda8261_attach);
MODULE_PARM_DESC(verbose, "Set verbosity level");

MODULE_AUTHOR("Manu Abraham");
MODULE_DESCRIPTION("TDA8261 8PSK/QPSK Tuner");
MODULE_LICENSE("GPL");
25 changes: 25 additions & 0 deletions trunk/drivers/media/dvb/frontends/tda8261.h
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#ifndef __TDA8261_H
#define __TDA8261_H

enum tda8261_step {
TDA8261_STEP_2000 = 0, /* 2000 kHz */
TDA8261_STEP_1000, /* 1000 kHz */
TDA8261_STEP_500, /* 500 kHz */
TDA8261_STEP_250, /* 250 kHz */
TDA8261_STEP_125 /* 125 kHz */
};

struct tda8261_config {
// u8 buf[16];
u8 addr;
enum tda8261_step step_size;
};

/* move out from here! */
static const struct tda8261_config sd1878c_config = {
// .name = "SD1878C",
.addr = 0x60,
.step_size = TDA8261_STEP_1000 /* kHz */
};

#endif// __TDA8261_H

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