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linux/drivers/media/dvb/frontends/tda827x.c
Michael Krufky 8ce47dad8e V4L/DVB (5317): Create tda827x dvb tuner module 
The patch moves the tda827x dvb tuning code to a separate module

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2007-04-27 15:43:35 -03:00

476 lines
14 KiB
C
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/*
*
* (c) 2005 Hartmut Hackmann
* (c) 2007 Michael Krufky
*
* 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 "tda827x.h"
static int debug = 0;
#define dprintk(args...) \
do { \
if (debug) printk(KERN_DEBUG "tda827x: " args); \
} while (0)
struct tda827x_priv {
int i2c_addr;
struct i2c_adapter *i2c_adap;
struct tda827x_config *cfg;
u32 frequency;
u32 bandwidth;
};
struct tda827x_data {
u32 lomax;
u8 spd;
u8 bs;
u8 bp;
u8 cp;
u8 gc3;
u8 div1p5;
};
static const struct tda827x_data tda827x_dvbt[] = {
{ .lomax = 62000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
{ .lomax = 66000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
{ .lomax = 76000000, .spd = 3, .bs = 1, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
{ .lomax = 84000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
{ .lomax = 93000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 98000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 109000000, .spd = 3, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 123000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
{ .lomax = 133000000, .spd = 2, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
{ .lomax = 151000000, .spd = 2, .bs = 1, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 154000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 181000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 0, .div1p5 = 0},
{ .lomax = 185000000, .spd = 2, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 217000000, .spd = 2, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 244000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
{ .lomax = 265000000, .spd = 1, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
{ .lomax = 302000000, .spd = 1, .bs = 1, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 324000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 370000000, .spd = 1, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 454000000, .spd = 1, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 493000000, .spd = 0, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
{ .lomax = 530000000, .spd = 0, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
{ .lomax = 554000000, .spd = 0, .bs = 1, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
{ .lomax = 604000000, .spd = 0, .bs = 1, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
{ .lomax = 696000000, .spd = 0, .bs = 2, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
{ .lomax = 740000000, .spd = 0, .bs = 2, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0},
{ .lomax = 820000000, .spd = 0, .bs = 3, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
{ .lomax = 865000000, .spd = 0, .bs = 3, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0},
{ .lomax = 0, .spd = 0, .bs = 0, .bp = 0, .cp = 0, .gc3 = 0, .div1p5 = 0}
};
static int tda827xo_set_params(struct dvb_frontend *fe,
struct dvb_frontend_parameters *params)
{
struct tda827x_priv *priv = fe->tuner_priv;
u8 buf[14];
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
.buf = buf, .len = sizeof(buf) };
int i, tuner_freq, if_freq;
u32 N;
switch (params->u.ofdm.bandwidth) {
case BANDWIDTH_6_MHZ:
if_freq = 4000000;
break;
case BANDWIDTH_7_MHZ:
if_freq = 4500000;
break;
default: /* 8 MHz or Auto */
if_freq = 5000000;
break;
}
tuner_freq = params->frequency + if_freq;
i = 0;
while (tda827x_dvbt[i].lomax < tuner_freq) {
if(tda827x_dvbt[i + 1].lomax == 0)
break;
i++;
}
N = ((tuner_freq + 125000) / 250000) << (tda827x_dvbt[i].spd + 2);
buf[0] = 0;
buf[1] = (N>>8) | 0x40;
buf[2] = N & 0xff;
buf[3] = 0;
buf[4] = 0x52;
buf[5] = (tda827x_dvbt[i].spd << 6) + (tda827x_dvbt[i].div1p5 << 5) +
(tda827x_dvbt[i].bs << 3) + tda827x_dvbt[i].bp;
buf[6] = (tda827x_dvbt[i].gc3 << 4) + 0x8f;
buf[7] = 0xbf;
buf[8] = 0x2a;
buf[9] = 0x05;
buf[10] = 0xff;
buf[11] = 0x00;
buf[12] = 0x00;
buf[13] = 0x40;
msg.len = 14;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
printk("%s: could not write to tuner at addr: 0x%02x\n",
__FUNCTION__, priv->i2c_addr << 1);
return -EIO;
}
msleep(500);
/* correct CP value */
buf[0] = 0x30;
buf[1] = 0x50 + tda827x_dvbt[i].cp;
msg.len = 2;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
priv->frequency = tuner_freq - if_freq; // FIXME
priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;
return 0;
}
static int tda827xo_sleep(struct dvb_frontend *fe)
{
struct tda827x_priv *priv = fe->tuner_priv;
static u8 buf[] = { 0x30, 0xd0 };
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
.buf = buf, .len = sizeof(buf) };
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
if (priv->cfg && priv->cfg->sleep)
priv->cfg->sleep(fe);
return 0;
}
/* ------------------------------------------------------------------ */
struct tda827xa_data {
u32 lomax;
u8 svco;
u8 spd;
u8 scr;
u8 sbs;
u8 gc3;
};
static const struct tda827xa_data tda827xa_dvbt[] = {
{ .lomax = 56875000, .svco = 3, .spd = 4, .scr = 0, .sbs = 0, .gc3 = 1},
{ .lomax = 67250000, .svco = 0, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
{ .lomax = 81250000, .svco = 1, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
{ .lomax = 97500000, .svco = 2, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
{ .lomax = 113750000, .svco = 3, .spd = 3, .scr = 0, .sbs = 1, .gc3 = 1},
{ .lomax = 134500000, .svco = 0, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
{ .lomax = 154000000, .svco = 1, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
{ .lomax = 162500000, .svco = 1, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
{ .lomax = 183000000, .svco = 2, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
{ .lomax = 195000000, .svco = 2, .spd = 2, .scr = 0, .sbs = 2, .gc3 = 1},
{ .lomax = 227500000, .svco = 3, .spd = 2, .scr = 0, .sbs = 2, .gc3 = 1},
{ .lomax = 269000000, .svco = 0, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 1},
{ .lomax = 290000000, .svco = 1, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 1},
{ .lomax = 325000000, .svco = 1, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
{ .lomax = 390000000, .svco = 2, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
{ .lomax = 455000000, .svco = 3, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
{ .lomax = 520000000, .svco = 0, .spd = 0, .scr = 0, .sbs = 3, .gc3 = 1},
{ .lomax = 538000000, .svco = 0, .spd = 0, .scr = 1, .sbs = 3, .gc3 = 1},
{ .lomax = 550000000, .svco = 1, .spd = 0, .scr = 0, .sbs = 3, .gc3 = 1},
{ .lomax = 620000000, .svco = 1, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
{ .lomax = 650000000, .svco = 1, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
{ .lomax = 700000000, .svco = 2, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
{ .lomax = 780000000, .svco = 2, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
{ .lomax = 820000000, .svco = 3, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
{ .lomax = 870000000, .svco = 3, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
{ .lomax = 911000000, .svco = 3, .spd = 0, .scr = 2, .sbs = 4, .gc3 = 0},
{ .lomax = 0, .svco = 0, .spd = 0, .scr = 0, .sbs = 0, .gc3 = 0}
};
static int tda827xa_set_params(struct dvb_frontend *fe,
struct dvb_frontend_parameters *params)
{
struct tda827x_priv *priv = fe->tuner_priv;
u8 buf[10];
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
.buf = buf, .len = sizeof(buf) };
int i, tuner_freq, if_freq;
u32 N;
if (priv->cfg && priv->cfg->lna_gain)
priv->cfg->lna_gain(fe, 1);
msleep(20);
switch (params->u.ofdm.bandwidth) {
case BANDWIDTH_6_MHZ:
if_freq = 4000000;
break;
case BANDWIDTH_7_MHZ:
if_freq = 4500000;
break;
default: /* 8 MHz or Auto */
if_freq = 5000000;
break;
}
tuner_freq = params->frequency + if_freq;
i = 0;
while (tda827xa_dvbt[i].lomax < tuner_freq) {
if(tda827xa_dvbt[i + 1].lomax == 0)
break;
i++;
}
N = ((tuner_freq + 31250) / 62500) << tda827xa_dvbt[i].spd;
buf[0] = 0; // subaddress
buf[1] = N >> 8;
buf[2] = N & 0xff;
buf[3] = 0;
buf[4] = 0x16;
buf[5] = (tda827xa_dvbt[i].spd << 5) + (tda827xa_dvbt[i].svco << 3) +
tda827xa_dvbt[i].sbs;
buf[6] = 0x4b + (tda827xa_dvbt[i].gc3 << 4);
buf[7] = 0x1c;
buf[8] = 0x06;
buf[9] = 0x24;
buf[10] = 0x00;
msg.len = 11;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
printk("%s: could not write to tuner at addr: 0x%02x\n",
__FUNCTION__, priv->i2c_addr << 1);
return -EIO;
}
buf[0] = 0x90;
buf[1] = 0xff;
buf[2] = 0x60;
buf[3] = 0x00;
buf[4] = 0x59; // lpsel, for 6MHz + 2
msg.len = 5;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
buf[0] = 0xa0;
buf[1] = 0x40;
msg.len = 2;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
msleep(11);
msg.flags = I2C_M_RD;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
msg.flags = 0;
buf[1] >>= 4;
dprintk("tda8275a AGC2 gain is: %d\n", buf[1]);
if ((buf[1]) < 2) {
if (priv->cfg && priv->cfg->lna_gain)
priv->cfg->lna_gain(fe, 0);
buf[0] = 0x60;
buf[1] = 0x0c;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
}
buf[0] = 0xc0;
buf[1] = 0x99; // lpsel, for 6MHz + 2
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
buf[0] = 0x60;
buf[1] = 0x3c;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
/* correct CP value */
buf[0] = 0x30;
buf[1] = 0x10 + tda827xa_dvbt[i].scr;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
msleep(163);
buf[0] = 0xc0;
buf[1] = 0x39; // lpsel, for 6MHz + 2
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
msleep(3);
/* freeze AGC1 */
buf[0] = 0x50;
buf[1] = 0x4f + (tda827xa_dvbt[i].gc3 << 4);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
priv->frequency = tuner_freq - if_freq; // FIXME
priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;
return 0;
}
static int tda827xa_sleep(struct dvb_frontend *fe)
{
struct tda827x_priv *priv = fe->tuner_priv;
static u8 buf[] = { 0x30, 0x90 };
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
.buf = buf, .len = sizeof(buf) };
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
if (priv->cfg && priv->cfg->sleep)
priv->cfg->sleep(fe);
return 0;
}
static int tda827x_release(struct dvb_frontend *fe)
{
kfree(fe->tuner_priv);
fe->tuner_priv = NULL;
return 0;
}
static int tda827x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct tda827x_priv *priv = fe->tuner_priv;
*frequency = priv->frequency;
return 0;
}
static int tda827x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
struct tda827x_priv *priv = fe->tuner_priv;
*bandwidth = priv->bandwidth;
return 0;
}
static int tda827x_init(struct dvb_frontend *fe)
{
struct tda827x_priv *priv = fe->tuner_priv;
if (priv->cfg && priv->cfg->init)
priv->cfg->init(fe);
return 0;
}
static struct dvb_tuner_ops tda827xo_tuner_ops = {
.info = {
.name = "Philips TDA827X",
},
.release = tda827x_release,
.init = tda827x_init,
.sleep = tda827xo_sleep,
.set_params = tda827xo_set_params,
.get_frequency = tda827x_get_frequency,
.get_bandwidth = tda827x_get_bandwidth,
};
static struct dvb_tuner_ops tda827xa_tuner_ops = {
.info = {
.name = "Philips TDA827XA",
},
.release = tda827x_release,
.init = tda827x_init,
.sleep = tda827xa_sleep,
.set_params = tda827xa_set_params,
.get_frequency = tda827x_get_frequency,
.get_bandwidth = tda827x_get_bandwidth,
};
struct dvb_frontend *tda827x_attach(struct dvb_frontend *fe, int addr,
struct i2c_adapter *i2c,
struct tda827x_config *cfg)
{
struct tda827x_priv *priv = NULL;
u8 data;
struct i2c_msg msg = { .addr = addr, .flags = I2C_M_RD,
.buf = &data, .len = 1 };
dprintk("%s:\n", __FUNCTION__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
if (i2c_transfer(i2c, &msg, 1) != 1) {
printk("%s: could not read from tuner at addr: 0x%02x\n",
__FUNCTION__, addr << 1);
return NULL;
}
priv = kzalloc(sizeof(struct tda827x_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;
priv->i2c_addr = addr;
priv->i2c_adap = i2c;
priv->cfg = cfg;
if ((data & 0x3c) == 0) {
dprintk("tda827x tuner found\n");
memcpy(&fe->ops.tuner_ops, &tda827xo_tuner_ops, sizeof(struct dvb_tuner_ops));
} else {
dprintk("tda827xa tuner found\n");
memcpy(&fe->ops.tuner_ops, &tda827xa_tuner_ops, sizeof(struct dvb_tuner_ops));
}
fe->tuner_priv = priv;
return fe;
}
EXPORT_SYMBOL(tda827x_attach);
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
MODULE_DESCRIPTION("DVB TDA827x driver");
MODULE_AUTHOR("Hartmut Hackmann");
MODULE_AUTHOR("Michael Krufky");
MODULE_LICENSE("GPL");
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* ---------------------------------------------------------------------------
* Local variables:
* c-basic-offset: 8
* End:
*/
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