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android_kernel_xiaomi_sm8350/drivers/media/dvb/frontends/tda827x.c
Michael Krufky 255c1887cc V4L/DVB (6622): tda827x: prevent possible NULL pointer dereference in tda827xa_lna_gain 
If tda827x_config hasn't been defined, exit the function.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-01-25 19:02:17 -02:00

850 lines
24 KiB
C
Raw Blame History

/*
*
* (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 <asm/types.h>
#include <linux/dvb/frontend.h>
#include <linux/videodev2.h>
#include "tda827x.h"
static int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
#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;
unsigned int sgIF;
unsigned char lpsel;
u32 frequency;
u32 bandwidth;
};
static void tda827x_set_std(struct dvb_frontend *fe,
struct analog_parameters *params)
{
struct tda827x_priv *priv = fe->tuner_priv;
char *mode;
priv->lpsel = 0;
if (params->std & V4L2_STD_MN) {
priv->sgIF = 92;
priv->lpsel = 1;
mode = "MN";
} else if (params->std & V4L2_STD_B) {
priv->sgIF = 108;
mode = "B";
} else if (params->std & V4L2_STD_GH) {
priv->sgIF = 124;
mode = "GH";
} else if (params->std & V4L2_STD_PAL_I) {
priv->sgIF = 124;
mode = "I";
} else if (params->std & V4L2_STD_DK) {
priv->sgIF = 124;
mode = "DK";
} else if (params->std & V4L2_STD_SECAM_L) {
priv->sgIF = 124;
mode = "L";
} else if (params->std & V4L2_STD_SECAM_LC) {
priv->sgIF = 20;
mode = "LC";
} else {
priv->sgIF = 124;
mode = "xx";
}
if (params->mode == V4L2_TUNER_RADIO)
priv->sgIF = 88; /* if frequency is 5.5 MHz */
dprintk("setting tda827x to system %s\n", mode);
}
/* ------------------------------------------------------------------ */
struct tda827x_data {
u32 lomax;
u8 spd;
u8 bs;
u8 bp;
u8 cp;
u8 gc3;
u8 div1p5;
};
static const struct tda827x_data tda827x_table[] = {
{ .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;
dprintk("%s:\n", __FUNCTION__);
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_table[i].lomax < tuner_freq) {
if (tda827x_table[i + 1].lomax == 0)
break;
i++;
}
N = ((tuner_freq + 125000) / 250000) << (tda827x_table[i].spd + 2);
buf[0] = 0;
buf[1] = (N>>8) | 0x40;
buf[2] = N & 0xff;
buf[3] = 0;
buf[4] = 0x52;
buf[5] = (tda827x_table[i].spd << 6) + (tda827x_table[i].div1p5 << 5) +
(tda827x_table[i].bs << 3) +
tda827x_table[i].bp;
buf[6] = (tda827x_table[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_table[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) };
dprintk("%s:\n", __FUNCTION__);
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;
}
/* ------------------------------------------------------------------ */
static int tda827xo_set_analog_params(struct dvb_frontend *fe,
struct analog_parameters *params)
{
unsigned char tuner_reg[8];
unsigned char reg2[2];
u32 N;
int i;
struct tda827x_priv *priv = fe->tuner_priv;
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0 };
unsigned int freq = params->frequency;
tda827x_set_std(fe, params);
if (params->mode == V4L2_TUNER_RADIO)
freq = freq / 1000;
N = freq + priv->sgIF;
i = 0;
while (tda827x_table[i].lomax < N * 62500) {
if (tda827x_table[i + 1].lomax == 0)
break;
i++;
}
N = N << tda827x_table[i].spd;
tuner_reg[0] = 0;
tuner_reg[1] = (unsigned char)(N>>8);
tuner_reg[2] = (unsigned char) N;
tuner_reg[3] = 0x40;
tuner_reg[4] = 0x52 + (priv->lpsel << 5);
tuner_reg[5] = (tda827x_table[i].spd << 6) +
(tda827x_table[i].div1p5 << 5) +
(tda827x_table[i].bs << 3) + tda827x_table[i].bp;
tuner_reg[6] = 0x8f + (tda827x_table[i].gc3 << 4);
tuner_reg[7] = 0x8f;
msg.buf = tuner_reg;
msg.len = 8;
i2c_transfer(priv->i2c_adap, &msg, 1);
msg.buf = reg2;
msg.len = 2;
reg2[0] = 0x80;
reg2[1] = 0;
i2c_transfer(priv->i2c_adap, &msg, 1);
reg2[0] = 0x60;
reg2[1] = 0xbf;
i2c_transfer(priv->i2c_adap, &msg, 1);
reg2[0] = 0x30;
reg2[1] = tuner_reg[4] + 0x80;
i2c_transfer(priv->i2c_adap, &msg, 1);
msleep(1);
reg2[0] = 0x30;
reg2[1] = tuner_reg[4] + 4;
i2c_transfer(priv->i2c_adap, &msg, 1);
msleep(1);
reg2[0] = 0x30;
reg2[1] = tuner_reg[4];
i2c_transfer(priv->i2c_adap, &msg, 1);
msleep(550);
reg2[0] = 0x30;
reg2[1] = (tuner_reg[4] & 0xfc) + tda827x_table[i].cp;
i2c_transfer(priv->i2c_adap, &msg, 1);
reg2[0] = 0x60;
reg2[1] = 0x3f;
i2c_transfer(priv->i2c_adap, &msg, 1);
reg2[0] = 0x80;
reg2[1] = 0x08; /* Vsync en */
i2c_transfer(priv->i2c_adap, &msg, 1);
priv->frequency = freq * 62500;
return 0;
}
static void tda827xo_agcf(struct dvb_frontend *fe)
{
struct tda827x_priv *priv = fe->tuner_priv;
unsigned char data[] = { 0x80, 0x0c };
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
.buf = data, .len = 2};
i2c_transfer(priv->i2c_adap, &msg, 1);
}
/* ------------------------------------------------------------------ */
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 struct tda827xa_data tda827xa_analog[] = {
{ .lomax = 56875000, .svco = 3, .spd = 4, .scr = 0, .sbs = 0, .gc3 = 3},
{ .lomax = 67250000, .svco = 0, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 3},
{ .lomax = 81250000, .svco = 1, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 3},
{ .lomax = 97500000, .svco = 2, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 3},
{ .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 = 3},
{ .lomax = 269000000, .svco = 0, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 3},
{ .lomax = 325000000, .svco = 1, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 1},
{ .lomax = 390000000, .svco = 2, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 3},
{ .lomax = 455000000, .svco = 3, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 3},
{ .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 = 554000000, .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[11];
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
.buf = buf, .len = sizeof(buf) };
int i, tuner_freq, if_freq;
u32 N;
dprintk("%s:\n", __FUNCTION__);
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) };
dprintk("%s:\n", __FUNCTION__);
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 void tda827xa_lna_gain(struct dvb_frontend *fe, int high,
struct analog_parameters *params)
{
struct tda827x_priv *priv = fe->tuner_priv;
unsigned char buf[] = {0x22, 0x01};
int arg;
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
.buf = buf, .len = sizeof(buf) };
if (NULL == priv->cfg) {
dprintk("tda827x_config not defined, cannot set LNA gain!\n");
return;
}
if (priv->cfg->config) {
if (high)
dprintk("setting LNA to high gain\n");
else
dprintk("setting LNA to low gain\n");
}
switch (*priv->cfg->config) {
case 0: /* no LNA */
break;
case 1: /* switch is GPIO 0 of tda8290 */
case 2:
/* turn Vsync on */
if (params->std & V4L2_STD_MN)
arg = 1;
else
arg = 0;
if (priv->cfg->tuner_callback)
priv->cfg->tuner_callback(priv->i2c_adap->algo_data,
1, arg);
buf[1] = high ? 0 : 1;
if (*priv->cfg->config == 2)
buf[1] = high ? 1 : 0;
i2c_transfer(priv->i2c_adap, &msg, 1);
break;
case 3: /* switch with GPIO of saa713x */
if (priv->cfg->tuner_callback)
priv->cfg->tuner_callback(priv->i2c_adap->algo_data,
0, high);
break;
}
}
static int tda827xa_set_analog_params(struct dvb_frontend *fe,
struct analog_parameters *params)
{
unsigned char tuner_reg[11];
u32 N;
int i;
struct tda827x_priv *priv = fe->tuner_priv;
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
.buf = tuner_reg, .len = sizeof(tuner_reg) };
unsigned int freq = params->frequency;
tda827x_set_std(fe, params);
tda827xa_lna_gain(fe, 1, params);
msleep(10);
if (params->mode == V4L2_TUNER_RADIO)
freq = freq / 1000;
N = freq + priv->sgIF;
i = 0;
while (tda827xa_analog[i].lomax < N * 62500) {
if (tda827xa_analog[i + 1].lomax == 0)
break;
i++;
}
N = N << tda827xa_analog[i].spd;
tuner_reg[0] = 0;
tuner_reg[1] = (unsigned char)(N>>8);
tuner_reg[2] = (unsigned char) N;
tuner_reg[3] = 0;
tuner_reg[4] = 0x16;
tuner_reg[5] = (tda827xa_analog[i].spd << 5) +
(tda827xa_analog[i].svco << 3) +
tda827xa_analog[i].sbs;
tuner_reg[6] = 0x8b + (tda827xa_analog[i].gc3 << 4);
tuner_reg[7] = 0x1c;
tuner_reg[8] = 4;
tuner_reg[9] = 0x20;
tuner_reg[10] = 0x00;
msg.len = 11;
i2c_transfer(priv->i2c_adap, &msg, 1);
tuner_reg[0] = 0x90;
tuner_reg[1] = 0xff;
tuner_reg[2] = 0xe0;
tuner_reg[3] = 0;
tuner_reg[4] = 0x99 + (priv->lpsel << 1);
msg.len = 5;
i2c_transfer(priv->i2c_adap, &msg, 1);
tuner_reg[0] = 0xa0;
tuner_reg[1] = 0xc0;
msg.len = 2;
i2c_transfer(priv->i2c_adap, &msg, 1);
tuner_reg[0] = 0x30;
tuner_reg[1] = 0x10 + tda827xa_analog[i].scr;
i2c_transfer(priv->i2c_adap, &msg, 1);
msg.flags = I2C_M_RD;
i2c_transfer(priv->i2c_adap, &msg, 1);
msg.flags = 0;
tuner_reg[1] >>= 4;
dprintk("AGC2 gain is: %d\n", tuner_reg[1]);
if (tuner_reg[1] < 1)
tda827xa_lna_gain(fe, 0, params);
msleep(100);
tuner_reg[0] = 0x60;
tuner_reg[1] = 0x3c;
i2c_transfer(priv->i2c_adap, &msg, 1);
msleep(163);
tuner_reg[0] = 0x50;
tuner_reg[1] = 0x8f + (tda827xa_analog[i].gc3 << 4);
i2c_transfer(priv->i2c_adap, &msg, 1);
tuner_reg[0] = 0x80;
tuner_reg[1] = 0x28;
i2c_transfer(priv->i2c_adap, &msg, 1);
tuner_reg[0] = 0xb0;
tuner_reg[1] = 0x01;
i2c_transfer(priv->i2c_adap, &msg, 1);
tuner_reg[0] = 0xc0;
tuner_reg[1] = 0x19 + (priv->lpsel << 1);
i2c_transfer(priv->i2c_adap, &msg, 1);
priv->frequency = freq * 62500;
return 0;
}
static void tda827xa_agcf(struct dvb_frontend *fe)
{
struct tda827x_priv *priv = fe->tuner_priv;
unsigned char data[] = {0x80, 0x2c};
struct i2c_msg msg = {.addr = priv->i2c_addr, .flags = 0,
.buf = data, .len = 2};
i2c_transfer(priv->i2c_adap, &msg, 1);
}
/* ------------------------------------------------------------------ */
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;
dprintk("%s:\n", __FUNCTION__);
if (priv->cfg && priv->cfg->init)
priv->cfg->init(fe);
return 0;
}
static int tda827x_probe_version(struct dvb_frontend *fe);
static int tda827x_initial_init(struct dvb_frontend *fe)
{
int ret;
ret = tda827x_probe_version(fe);
if (ret)
return ret;
return fe->ops.tuner_ops.init(fe);
}
static int tda827x_initial_sleep(struct dvb_frontend *fe)
{
int ret;
ret = tda827x_probe_version(fe);
if (ret)
return ret;
return fe->ops.tuner_ops.sleep(fe);
}
static struct dvb_tuner_ops tda827xo_tuner_ops = {
.info = {
.name = "Philips TDA827X",
.frequency_min = 55000000,
.frequency_max = 860000000,
.frequency_step = 250000
},
.release = tda827x_release,
.init = tda827x_initial_init,
.sleep = tda827x_initial_sleep,
.set_params = tda827xo_set_params,
.set_analog_params = tda827xo_set_analog_params,
.get_frequency = tda827x_get_frequency,
.get_bandwidth = tda827x_get_bandwidth,
};
static struct dvb_tuner_ops tda827xa_tuner_ops = {
.info = {
.name = "Philips TDA827XA",
.frequency_min = 44000000,
.frequency_max = 906000000,
.frequency_step = 62500
},
.release = tda827x_release,
.init = tda827x_init,
.sleep = tda827xa_sleep,
.set_params = tda827xa_set_params,
.set_analog_params = tda827xa_set_analog_params,
.get_frequency = tda827x_get_frequency,
.get_bandwidth = tda827x_get_bandwidth,
};
static int tda827x_probe_version(struct dvb_frontend *fe)
{ u8 data;
struct tda827x_priv *priv = fe->tuner_priv;
struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = I2C_M_RD,
.buf = &data, .len = 1 };
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 read from tuner at addr: 0x%02x\n",
__FUNCTION__, msg.addr << 1);
return -EIO;
}
if ((data & 0x3c) == 0) {
dprintk("tda827x tuner found\n");
fe->ops.tuner_ops.init = tda827x_init;
fe->ops.tuner_ops.sleep = tda827xo_sleep;
if (priv->cfg)
priv->cfg->agcf = tda827xo_agcf;
} else {
dprintk("tda827xa tuner found\n");
memcpy(&fe->ops.tuner_ops, &tda827xa_tuner_ops, sizeof(struct dvb_tuner_ops));
if (priv->cfg)
priv->cfg->agcf = tda827xa_agcf;
}
return 0;
}
struct dvb_frontend *tda827x_attach(struct dvb_frontend *fe, int addr,
struct i2c_adapter *i2c,
struct tda827x_config *cfg)
{
struct tda827x_priv *priv = NULL;
dprintk("%s:\n", __FUNCTION__);
priv = kzalloc(sizeof(struct tda827x_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;
priv->i2c_addr = addr;
priv->i2c_adap = i2c;
priv->cfg = cfg;
memcpy(&fe->ops.tuner_ops, &tda827xo_tuner_ops, sizeof(struct dvb_tuner_ops));
fe->tuner_priv = priv;
dprintk("type set to %s\n", fe->ops.tuner_ops.info.name);
return fe;
}
EXPORT_SYMBOL_GPL(tda827x_attach);
MODULE_DESCRIPTION("DVB TDA827x driver");
MODULE_AUTHOR("Hartmut Hackmann <hartmut.hackmann@t-online.de>");
MODULE_AUTHOR("Michael Krufky <mkrufky@linuxtv.org>");
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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