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linux/drivers/media/dvb/frontends/cx24116.c
Igor M. Liplianin cc8c4f3a9c V4L/DVB (8994): Adjust MPEG initialization in cx24116 
Adjust MPEG initialization in cx24116 in order to accomodate different
MPEG CLK position and polarity in different cards.

Signed-off-by: Igor M. Liplianin <liplianin@me.by>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2008-10-12 09:37:04 -02:00

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/*
Conexant cx24116/cx24118 - DVBS/S2 Satellite demod/tuner driver
Copyright (C) 2006-2008 Steven Toth <stoth@hauppauge.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.
*/
/*
* Updates by Darron Broad 2007.
*
* March
* Fixed some bugs.
* Added diseqc support.
* Added corrected signal strength support.
*
* August
* Sync with legacy version.
* Some clean ups.
*/
/* Updates by Igor Liplianin
*
* September, 9th 2008
* Fixed locking on high symbol rates (>30000).
*/
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/firmware.h>
#include "dvb_frontend.h"
#include "cx24116.h"
/*
* Fetch firmware in the following manner.
*
* #!/bin/sh
* wget ftp://167.206.143.11/outgoing/Oxford/88x_2_117_24275_1_INF.zip
* unzip 88x_2_117_24275_1_INF.zip
* dd if=Driver88/hcw88bda.sys of=dvb-fe-cx24116.fw skip=81768 bs=1 count=32522
*/
#define CX24116_DEFAULT_FIRMWARE "dvb-fe-cx24116.fw"
#define CX24116_SEARCH_RANGE_KHZ 5000
/* registers (TO BE COMPLETED) */
#define CX24116_REG_SIGNAL (0xd5)
/* arg buffer size */
#define CX24116_ARGLEN (0x1e)
/* arg offset for DiSEqC */
#define CX24116_DISEQC_BURST (1)
#define CX24116_DISEQC_ARG2_2 (2) /* unknown value=2 */
#define CX24116_DISEQC_ARG3_0 (3) /* unknown value=0 */
#define CX24116_DISEQC_ARG4_0 (4) /* unknown value=0 */
#define CX24116_DISEQC_MSGLEN (5)
#define CX24116_DISEQC_MSGOFS (6)
/* DiSEqC burst */
#define CX24116_DISEQC_MINI_A (0)
#define CX24116_DISEQC_MINI_B (1)
static int debug = 0;
#define dprintk(args...) \
do { \
if (debug) printk ("cx24116: " args); \
} while (0)
enum cmds
{
CMD_INIT_CMD10 = 0x10,
CMD_TUNEREQUEST = 0x11,
CMD_INIT_CMD13 = 0x13,
CMD_INIT_CMD14 = 0x14,
CMD_SEND_DISEQC = 0x21,
CMD_SET_TONEPRE = 0x22,
CMD_SET_TONE = 0x23,
};
/* The Demod/Tuner can't easily provide these, we cache them */
struct cx24116_tuning
{
u32 frequency;
u32 symbol_rate;
fe_spectral_inversion_t inversion;
fe_code_rate_t fec;
fe_modulation_t modulation;
/* Demod values */
u8 fec_val;
u8 fec_mask;
u8 inversion_val;
};
/* Basic commands that are sent to the firmware */
struct cx24116_cmd
{
u8 len;
u8 args[CX24116_ARGLEN];
};
struct cx24116_state
{
struct i2c_adapter* i2c;
const struct cx24116_config* config;
struct dvb_frontend frontend;
struct cx24116_tuning dcur;
struct cx24116_tuning dnxt;
u8 skip_fw_load;
u8 burst;
};
static int cx24116_writereg(struct cx24116_state* state, int reg, int data)
{
u8 buf[] = { reg, data };
struct i2c_msg msg = { .addr = state->config->demod_address,
.flags = 0, .buf = buf, .len = 2 };
int err;
if (debug>1)
printk("cx24116: %s: write reg 0x%02x, value 0x%02x\n",
__func__,reg, data);
if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
printk("%s: writereg error(err == %i, reg == 0x%02x,"
" value == 0x%02x)\n", __func__, err, reg, data);
return -EREMOTEIO;
}
return 0;
}
/* Bulk byte writes to a single I2C address, for 32k firmware load */
static int cx24116_writeregN(struct cx24116_state* state, int reg, u8 *data, u16 len)
{
int ret = -EREMOTEIO;
struct i2c_msg msg;
u8 *buf;
buf = kmalloc(len + 1, GFP_KERNEL);
if (buf == NULL) {
printk("Unable to kmalloc\n");
ret = -ENOMEM;
goto error;
}
*(buf) = reg;
memcpy(buf + 1, data, len);
msg.addr = state->config->demod_address;
msg.flags = 0;
msg.buf = buf;
msg.len = len + 1;
if (debug>1)
printk("cx24116: %s: write regN 0x%02x, len = %d\n",
__func__,reg, len);
if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1) {
printk("%s: writereg error(err == %i, reg == 0x%02x\n",
__func__, ret, reg);
ret = -EREMOTEIO;
}
error:
kfree(buf);
return ret;
}
static int cx24116_readreg(struct cx24116_state* state, u8 reg)
{
int ret;
u8 b0[] = { reg };
u8 b1[] = { 0 };
struct i2c_msg msg[] = {
{ .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 }
};
ret = i2c_transfer(state->i2c, msg, 2);
if (ret != 2) {
printk("%s: reg=0x%x (error=%d)\n", __func__, reg, ret);
return ret;
}
if (debug>1)
printk("cx24116: read reg 0x%02x, value 0x%02x\n",reg, b1[0]);
return b1[0];
}
static int cx24116_set_inversion(struct cx24116_state* state, fe_spectral_inversion_t inversion)
{
dprintk("%s(%d)\n", __func__, inversion);
switch (inversion) {
case INVERSION_OFF:
state->dnxt.inversion_val = 0x00;
break;
case INVERSION_ON:
state->dnxt.inversion_val = 0x04;
break;
case INVERSION_AUTO:
state->dnxt.inversion_val = 0x0C;
break;
default:
return -EINVAL;
}
state->dnxt.inversion = inversion;
return 0;
}
/* A table of modulation, fec and configuration bytes for the demod.
* Not all S2 mmodulation schemes are support and not all rates with
* a scheme are support. Especially, no auto detect when in S2 mode.
*/
struct cx24116_modfec {
fe_modulation_t modulation;
fe_code_rate_t fec;
u8 mask; /* In DVBS mode this is used to autodetect */
u8 val; /* Passed to the firmware to indicate mode selection */
} CX24116_MODFEC_MODES[] = {
/* QPSK. For unknown rates we set hardware to auto detect 0xfe 0x30 */
{ QPSK, FEC_NONE, 0xfe, 0x30 },
{ QPSK, FEC_1_2, 0x02, 0x2e },
{ QPSK, FEC_2_3, 0x04, 0x2f },
{ QPSK, FEC_3_4, 0x08, 0x30 },
{ QPSK, FEC_4_5, 0xfe, 0x30 },
{ QPSK, FEC_5_6, 0x20, 0x31 },
{ QPSK, FEC_6_7, 0xfe, 0x30 },
{ QPSK, FEC_7_8, 0x80, 0x32 },
{ QPSK, FEC_8_9, 0xfe, 0x30 },
{ QPSK, FEC_AUTO, 0xfe, 0x30 },
/* NBC-QPSK */
{ NBC_QPSK, FEC_1_2, 0x00, 0x04 },
{ NBC_QPSK, FEC_3_5, 0x00, 0x05 },
{ NBC_QPSK, FEC_2_3, 0x00, 0x06 },
{ NBC_QPSK, FEC_3_4, 0x00, 0x07 },
{ NBC_QPSK, FEC_4_5, 0x00, 0x08 },
{ NBC_QPSK, FEC_5_6, 0x00, 0x09 },
{ NBC_QPSK, FEC_8_9, 0x00, 0x0a },
{ NBC_QPSK, FEC_9_10, 0x00, 0x0b },
/* 8PSK */
{ _8PSK, FEC_3_5, 0x00, 0x0c },
{ _8PSK, FEC_2_3, 0x00, 0x0d },
{ _8PSK, FEC_3_4, 0x00, 0x0e },
{ _8PSK, FEC_5_6, 0x00, 0x0f },
{ _8PSK, FEC_9_10, 0x00, 0x11 },
};
static int cx24116_lookup_fecmod(struct cx24116_state* state,
fe_modulation_t m, fe_code_rate_t f)
{
int i, ret = -EOPNOTSUPP;
for(i=0 ; i < sizeof(CX24116_MODFEC_MODES) / sizeof(struct cx24116_modfec) ; i++)
{
if( (m == CX24116_MODFEC_MODES[i].modulation) &&
(f == CX24116_MODFEC_MODES[i].fec) )
{
ret = i;
break;
}
}
return ret;
}
static int cx24116_set_fec(struct cx24116_state* state, fe_modulation_t mod, fe_code_rate_t fec)
{
int ret = 0;
dprintk("%s()\n", __func__);
ret = cx24116_lookup_fecmod(state, mod, fec);
if(ret < 0)
return ret;
state->dnxt.fec_val = CX24116_MODFEC_MODES[ret].val;
state->dnxt.fec_mask = CX24116_MODFEC_MODES[ret].mask;
dprintk("%s() fec_val/mask = 0x%02x/0x%02x\n", __func__,
state->dnxt.fec_val, state->dnxt.fec_mask);
return 0;
}
static int cx24116_set_symbolrate(struct cx24116_state* state, u32 rate)
{
int ret = 0;
dprintk("%s()\n", __func__);
state->dnxt.symbol_rate = rate;
dprintk("%s() symbol_rate = %d\n", __func__, state->dnxt.symbol_rate);
/* check if symbol rate is within limits */
if ((state->dnxt.symbol_rate > state->frontend.ops.info.symbol_rate_max) ||
(state->dnxt.symbol_rate < state->frontend.ops.info.symbol_rate_min))
ret = -EOPNOTSUPP;
return ret;
}
static int cx24116_load_firmware (struct dvb_frontend* fe, const struct firmware *fw);
static int cx24116_firmware_ondemand(struct dvb_frontend* fe)
{
struct cx24116_state *state = fe->demodulator_priv;
const struct firmware *fw;
int ret = 0;
dprintk("%s()\n",__func__);
if (cx24116_readreg(state, 0x20) > 0)
{
if (state->skip_fw_load)
return 0;
/* Load firmware */
/* request the firmware, this will block until someone uploads it */
printk("%s: Waiting for firmware upload (%s)...\n", __func__, CX24116_DEFAULT_FIRMWARE);
ret = request_firmware(&fw, CX24116_DEFAULT_FIRMWARE, &state->i2c->dev);
printk("%s: Waiting for firmware upload(2)...\n", __func__);
if (ret) {
printk("%s: No firmware uploaded (timeout or file not found?)\n", __func__);
return ret;
}
/* Make sure we don't recurse back through here during loading */
state->skip_fw_load = 1;
ret = cx24116_load_firmware(fe, fw);
if (ret)
printk("%s: Writing firmware to device failed\n", __func__);
release_firmware(fw);
printk("%s: Firmware upload %s\n", __func__, ret == 0 ? "complete" : "failed");
/* Ensure firmware is always loaded if required */
state->skip_fw_load = 0;
}
return ret;
}
/* Take a basic firmware command structure, format it and forward it for processing */
static int cx24116_cmd_execute(struct dvb_frontend* fe, struct cx24116_cmd *cmd)
{
struct cx24116_state *state = fe->demodulator_priv;
int i, ret;
dprintk("%s()\n", __func__);
/* Load the firmware if required */
if ( (ret = cx24116_firmware_ondemand(fe)) != 0)
{
printk("%s(): Unable initialise the firmware\n", __func__);
return ret;
}
/* Write the command */
for(i = 0; i < cmd->len ; i++)
{
dprintk("%s: 0x%02x == 0x%02x\n", __func__, i, cmd->args[i]);
cx24116_writereg(state, i, cmd->args[i]);
}
/* Start execution and wait for cmd to terminate */
cx24116_writereg(state, 0x1f, 0x01);
while( cx24116_readreg(state, 0x1f) )
{
msleep(10);
if(i++ > 64)
{
/* Avoid looping forever if the firmware does no respond */
printk("%s() Firmware not responding\n", __func__);
return -EREMOTEIO;
}
}
return 0;
}
static int cx24116_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
{
struct cx24116_state* state = fe->demodulator_priv;
struct cx24116_cmd cmd;
int ret;
dprintk("%s\n", __func__);
dprintk("Firmware is %zu bytes (%02x %02x .. %02x %02x)\n"
,fw->size
,fw->data[0]
,fw->data[1]
,fw->data[ fw->size-2 ]
,fw->data[ fw->size-1 ]
);
/* Toggle 88x SRST pin to reset demod */
if (state->config->reset_device)
state->config->reset_device(fe);
/* Begin the firmware load process */
/* Prepare the demod, load the firmware, cleanup after load */
cx24116_writereg(state, 0xF1, 0x08);
cx24116_writereg(state, 0xF2, cx24116_readreg(state, 0xF2) | 0x03);
cx24116_writereg(state, 0xF3, 0x46);
cx24116_writereg(state, 0xF9, 0x00);
cx24116_writereg(state, 0xF0, 0x03);
cx24116_writereg(state, 0xF4, 0x81);
cx24116_writereg(state, 0xF5, 0x00);
cx24116_writereg(state, 0xF6, 0x00);
/* write the entire firmware as one transaction */
cx24116_writeregN(state, 0xF7, fw->data, fw->size);
cx24116_writereg(state, 0xF4, 0x10);
cx24116_writereg(state, 0xF0, 0x00);
cx24116_writereg(state, 0xF8, 0x06);
/* Firmware CMD 10: Chip config? */
cmd.args[0x00] = CMD_INIT_CMD10;
cmd.args[0x01] = 0x05;
cmd.args[0x02] = 0xdc;
cmd.args[0x03] = 0xda;
cmd.args[0x04] = 0xae;
cmd.args[0x05] = 0xaa;
cmd.args[0x06] = 0x04;
cmd.args[0x07] = 0x9d;
cmd.args[0x08] = 0xfc;
cmd.args[0x09] = 0x06;
cmd.len= 0x0a;
ret = cx24116_cmd_execute(fe, &cmd);
if (ret != 0)
return ret;
cx24116_writereg(state, 0x9d, 0x00);
/* Firmware CMD 14: Unknown */
cmd.args[0x00] = CMD_INIT_CMD14;
cmd.args[0x01] = 0x00;
cmd.args[0x02] = 0x00;
cmd.len= 0x03;
ret = cx24116_cmd_execute(fe, &cmd);
if (ret != 0)
return ret;
cx24116_writereg(state, 0xe5, 0x00);
/* Firmware CMD 13: Unknown - Firmware config? */
cmd.args[0x00] = CMD_INIT_CMD13;
cmd.args[0x01] = 0x01;
cmd.args[0x02] = 0x75;
cmd.args[0x03] = 0x00;
if (state->config->mpg_clk_pos_pol)
cmd.args[0x04] = state->config->mpg_clk_pos_pol;
else
cmd.args[0x04] = 0x02;
cmd.args[0x05] = 0x00;
cmd.len= 0x06;
ret = cx24116_cmd_execute(fe, &cmd);
if (ret != 0)
return ret;
return 0;
}
static int cx24116_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
/* The isl6421 module will override this function in the fops. */
dprintk("%s() This should never appear if the isl6421 module is loaded correctly\n",__func__);
return -EOPNOTSUPP;
}
static int cx24116_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
struct cx24116_state *state = fe->demodulator_priv;
int lock = cx24116_readreg(state, 0x9d);
dprintk("%s: status = 0x%02x\n", __func__, lock);
*status = 0;
if (lock & 0x01)
*status |= FE_HAS_SIGNAL;
if (lock & 0x02)
*status |= FE_HAS_CARRIER;
if (lock & 0x04)
*status |= FE_HAS_VITERBI;
if (lock & 0x08)
*status |= FE_HAS_SYNC | FE_HAS_LOCK;
return 0;
}
/* TODO: Not clear how we do this */
static int cx24116_read_ber(struct dvb_frontend* fe, u32* ber)
{
//struct cx24116_state *state = fe->demodulator_priv;
dprintk("%s()\n", __func__);
*ber = 0;
return 0;
}
/* Signal strength (0..100)% = (sig & 0xf0) * 10 + (sig & 0x0f) * 10 / 16 */
static int cx24116_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
{
struct cx24116_state *state = fe->demodulator_priv;
u8 strength_reg;
static const u32 strength_tab[] = { /* 10 x Table (rounded up) */
0x00000,0x0199A,0x03333,0x04ccD,0x06667,0x08000,0x0999A,0x0b333,0x0cccD,0x0e667,
0x10000,0x1199A,0x13333,0x14ccD,0x16667,0x18000 };
dprintk("%s()\n", __func__);
strength_reg = cx24116_readreg(state, CX24116_REG_SIGNAL);
if(strength_reg < 0xa0)
*signal_strength = strength_tab [ ( strength_reg & 0xf0 ) >> 4 ] +
( strength_tab [ ( strength_reg & 0x0f ) ] >> 4 );
else
*signal_strength = 0xffff;
dprintk("%s: Signal strength (raw / cooked) = (0x%02x / 0x%04x)\n",
__func__,strength_reg,*signal_strength);
return 0;
}
/* TODO: Not clear how we do this */
static int cx24116_read_snr(struct dvb_frontend* fe, u16* snr)
{
//struct cx24116_state *state = fe->demodulator_priv;
dprintk("%s()\n", __func__);
*snr = 0;
return 0;
}
/* TODO: Not clear how we do this */
static int cx24116_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
//struct cx24116_state *state = fe->demodulator_priv;
dprintk("%s()\n", __func__);
*ucblocks = 0;
return 0;
}
/* Overwrite the current tuning params, we are about to tune */
static void cx24116_clone_params(struct dvb_frontend* fe)
{
struct cx24116_state *state = fe->demodulator_priv;
memcpy(&state->dcur, &state->dnxt, sizeof(state->dcur));
}
static int cx24116_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
struct cx24116_cmd cmd;
int ret;
dprintk("%s(%d)\n", __func__, tone);
if ( (tone != SEC_TONE_ON) && (tone != SEC_TONE_OFF) ) {
printk("%s: Invalid, tone=%d\n", __func__, tone);
return -EINVAL;
}
/* This is always done before the tone is set */
cmd.args[0x00] = CMD_SET_TONEPRE;
cmd.args[0x01] = 0x00;
cmd.len= 0x02;
ret = cx24116_cmd_execute(fe, &cmd);
if (ret != 0)
return ret;
/* Now we set the tone */
cmd.args[0x00] = CMD_SET_TONE;
cmd.args[0x01] = 0x00;
cmd.args[0x02] = 0x00;
switch (tone) {
case SEC_TONE_ON:
dprintk("%s: setting tone on\n", __func__);
cmd.args[0x03] = 0x01;
break;
case SEC_TONE_OFF:
dprintk("%s: setting tone off\n",__func__);
cmd.args[0x03] = 0x00;
break;
}
cmd.len= 0x04;
return cx24116_cmd_execute(fe, &cmd);
}
/* Initialise DiSEqC */
static int cx24116_diseqc_init(struct dvb_frontend* fe)
{
struct cx24116_state *state = fe->demodulator_priv;
/* Default DiSEqC burst state */
state->burst = CX24116_DISEQC_MINI_A;
return 0;
}
/* Send DiSEqC message with derived burst (hack) || previous burst */
static int cx24116_send_diseqc_msg(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd *d)
{
struct cx24116_state *state = fe->demodulator_priv;
struct cx24116_cmd cmd;
int i, ret;
/* Dump DiSEqC message */
if (debug) {
printk("cx24116: %s(", __func__);
for(i = 0 ; i < d->msg_len ;) {
printk("0x%02x", d->msg[i]);
if(++i < d->msg_len)
printk(", ");
}
printk(")\n");
}
if(d->msg_len > (CX24116_ARGLEN - CX24116_DISEQC_MSGOFS))
return -EINVAL;
cmd.args[0x00] = CMD_SEND_DISEQC;
cmd.args[CX24116_DISEQC_ARG2_2] = 0x02;
cmd.args[CX24116_DISEQC_ARG3_0] = 0x00;
cmd.args[CX24116_DISEQC_ARG4_0] = 0x00;
/* DiSEqC message */
for (i = 0; i < d->msg_len; i++)
cmd.args[CX24116_DISEQC_MSGOFS + i] = d->msg[i];
/* Hack: Derive burst from command else use previous burst */
if(d->msg_len >= 4 && d->msg[2] == 0x38)
cmd.args[CX24116_DISEQC_BURST] = (d->msg[3] >> 2) & 1;
else
cmd.args[CX24116_DISEQC_BURST] = state->burst;
cmd.args[CX24116_DISEQC_MSGLEN] = d->msg_len;
cmd.len = CX24116_DISEQC_MSGOFS + d->msg_len;
ret = cx24116_cmd_execute(fe, &cmd);
/* Firmware command duration is unknown, so guess...
*
* Eutelsat spec:
* >15ms delay +
* 13.5ms per byte +
* >15ms delay +
* 12.5ms burst +
* >15ms delay
*/
if(ret == 0)
msleep( (cmd.args[CX24116_DISEQC_MSGLEN] << 4) + 60 );
return ret;
}
/* Send DiSEqC burst */
static int cx24116_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
{
struct cx24116_state *state = fe->demodulator_priv;
struct cx24116_cmd cmd;
int ret;
dprintk("%s(%d)\n",__func__,(int)burst);
cmd.args[0x00] = CMD_SEND_DISEQC;
cmd.args[CX24116_DISEQC_ARG2_2] = 0x02;
cmd.args[CX24116_DISEQC_ARG3_0] = 0x00;
cmd.args[CX24116_DISEQC_ARG4_0] = 0x00;
if (burst == SEC_MINI_A)
cmd.args[CX24116_DISEQC_BURST] = CX24116_DISEQC_MINI_A;
else if(burst == SEC_MINI_B)
cmd.args[CX24116_DISEQC_BURST] = CX24116_DISEQC_MINI_B;
else
return -EINVAL;
/* Cache as previous burst state */
state->burst= cmd.args[CX24116_DISEQC_BURST];
cmd.args[CX24116_DISEQC_MSGLEN] = 0x00;
cmd.len= CX24116_DISEQC_MSGOFS;
ret= cx24116_cmd_execute(fe, &cmd);
/* Firmware command duration is unknown, so guess... */
if(ret == 0)
msleep(60);
return ret;
}
static void cx24116_release(struct dvb_frontend* fe)
{
struct cx24116_state* state = fe->demodulator_priv;
dprintk("%s\n",__func__);
kfree(state);
}
static struct dvb_frontend_ops cx24116_ops;
struct dvb_frontend* cx24116_attach(const struct cx24116_config* config,
struct i2c_adapter* i2c)
{
struct cx24116_state* state = NULL;
int ret;
dprintk("%s\n",__func__);
/* allocate memory for the internal state */
state = kmalloc(sizeof(struct cx24116_state), GFP_KERNEL);
if (state == NULL) {
printk("Unable to kmalloc\n");
goto error;
}
/* setup the state */
memset(state, 0, sizeof(struct cx24116_state));
state->config = config;
state->i2c = i2c;
/* check if the demod is present */
ret = (cx24116_readreg(state, 0xFF) << 8) | cx24116_readreg(state, 0xFE);
if (ret != 0x0501) {
printk("Invalid probe, probably not a CX24116 device\n");
goto error;
}
/* create dvb_frontend */
memcpy(&state->frontend.ops, &cx24116_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
kfree(state);
return NULL;
}
static int cx24116_get_params(struct dvb_frontend* fe)
{
struct cx24116_state *state = fe->demodulator_priv;
struct tv_frontend_properties *cache = &fe->tv_property_cache;
dprintk("%s()\n",__func__);
cache->frequency = state->dcur.frequency;
cache->inversion = state->dcur.inversion;
cache->modulation = state->dcur.modulation;
cache->fec_inner = state->dcur.fec;
cache->symbol_rate = state->dcur.symbol_rate;
return 0;
}
static int cx24116_initfe(struct dvb_frontend* fe)
{
dprintk("%s()\n",__func__);
return cx24116_diseqc_init(fe);
}
static int cx24116_set_property(struct dvb_frontend *fe, tv_property_t* tvp)
{
dprintk("%s(..)\n", __func__);
return 0;
}
static int cx24116_set_params(struct dvb_frontend *fe)
{
dprintk("%s(..) We were notified that a tune request may occur\n", __func__);
return 0;
}
/* dvb-core told us to tune, the tv property cache will be complete,
* it's safe for is to pull values and use them for tuning purposes.
*/
static int cx24116_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
struct cx24116_state *state = fe->demodulator_priv;
struct tv_frontend_properties *c = &fe->tv_property_cache;
struct cx24116_cmd cmd;
fe_status_t tunerstat;
int ret, above30msps;
u8 retune=4;
dprintk("%s()\n",__func__);
state->dnxt.modulation = c->modulation;
state->dnxt.frequency = c->frequency;
if ((ret = cx24116_set_inversion(state, c->inversion)) != 0)
return ret;
if ((ret = cx24116_set_fec(state, c->modulation, c->fec_inner)) != 0)
return ret;
if ((ret = cx24116_set_symbolrate(state, c->symbol_rate)) != 0)
return ret;
/* discard the 'current' tuning parameters and prepare to tune */
cx24116_clone_params(fe);
dprintk("%s: frequency = %d\n", __func__, state->dcur.frequency);
dprintk("%s: symbol_rate = %d\n", __func__, state->dcur.symbol_rate);
dprintk("%s: FEC = %d (mask/val = 0x%02x/0x%02x)\n", __func__,
state->dcur.fec, state->dcur.fec_mask, state->dcur.fec_val);
dprintk("%s: Inversion = %d (val = 0x%02x)\n", __func__,
state->dcur.inversion, state->dcur.inversion_val);
if (state->config->set_ts_params)
state->config->set_ts_params(fe, 0);
above30msps = (state->dcur.symbol_rate > 30000000);
if (above30msps){
cx24116_writereg(state, 0xF9, 0x01);
cx24116_writereg(state, 0xF3, 0x44);
} else {
cx24116_writereg(state, 0xF9, 0x00);
cx24116_writereg(state, 0xF3, 0x46);
}
/* Prepare a tune request */
cmd.args[0x00] = CMD_TUNEREQUEST;
/* Frequency */
cmd.args[0x01] = (state->dcur.frequency & 0xff0000) >> 16;
cmd.args[0x02] = (state->dcur.frequency & 0x00ff00) >> 8;
cmd.args[0x03] = (state->dcur.frequency & 0x0000ff);
/* Symbol Rate */
cmd.args[0x04] = ((state->dcur.symbol_rate / 1000) & 0xff00) >> 8;
cmd.args[0x05] = ((state->dcur.symbol_rate / 1000) & 0x00ff);
/* Automatic Inversion */
cmd.args[0x06] = state->dcur.inversion_val;
/* Modulation / FEC & Pilot Off */
cmd.args[0x07] = state->dcur.fec_val;
if (c->pilot == PILOT_ON)
cmd.args[0x07] |= 0x40;
cmd.args[0x08] = CX24116_SEARCH_RANGE_KHZ >> 8;
cmd.args[0x09] = CX24116_SEARCH_RANGE_KHZ & 0xff;
cmd.args[0x0a] = 0x00;
cmd.args[0x0b] = 0x00;
cmd.args[0x0c] = 0x02;
cmd.args[0x0d] = state->dcur.fec_mask;
if (above30msps){
cmd.args[0x0e] = 0x04;
cmd.args[0x0f] = 0x00;
cmd.args[0x10] = 0x01;
cmd.args[0x11] = 0x77;
cmd.args[0x12] = 0x36;
} else {
cmd.args[0x0e] = 0x06;
cmd.args[0x0f] = 0x00;
cmd.args[0x10] = 0x00;
cmd.args[0x11] = 0xFA;
cmd.args[0x12] = 0x24;
}
cmd.len= 0x13;
/* We need to support pilot and non-pilot tuning in the
* driver automatically. This is a workaround for because
* the demod does not support autodetect.
*/
do {
/* Reset status register? */
cx24116_writereg(state, 0x9d, 0xc1);
/* Tune */
ret = cx24116_cmd_execute(fe, &cmd);
if( ret != 0 )
break;
/* The hardware can take time to lock, wait a while */
msleep(500);
cx24116_read_status(fe, &tunerstat);
if(tunerstat & FE_HAS_SIGNAL) {
if(tunerstat & FE_HAS_SYNC)
/* Tuned */
break;
else if(c->pilot == PILOT_AUTO)
/* Toggle pilot bit */
cmd.args[0x07] ^= 0x40;
}
}
while(--retune);
return ret;
}
static struct dvb_frontend_ops cx24116_ops = {
.info = {
.name = "Conexant CX24116/CX24118",
.type = FE_QPSK,
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_stepsize = 1011, /* kHz for QPSK frontends */
.frequency_tolerance = 5000,
.symbol_rate_min = 1000000,
.symbol_rate_max = 45000000,
.caps = FE_CAN_INVERSION_AUTO |
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
FE_CAN_QPSK | FE_CAN_RECOVER
},
.release = cx24116_release,
.init = cx24116_initfe,
.read_status = cx24116_read_status,
.read_ber = cx24116_read_ber,
.read_signal_strength = cx24116_read_signal_strength,
.read_snr = cx24116_read_snr,
.read_ucblocks = cx24116_read_ucblocks,
.set_tone = cx24116_set_tone,
.set_voltage = cx24116_set_voltage,
.diseqc_send_master_cmd = cx24116_send_diseqc_msg,
.diseqc_send_burst = cx24116_diseqc_send_burst,
.set_property = cx24116_set_property,
.set_params = cx24116_set_params,
.set_frontend = cx24116_set_frontend,
};
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)");
MODULE_DESCRIPTION("DVB Frontend module for Conexant cx24116/cx24118 hardware");
MODULE_AUTHOR("Steven Toth");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(cx24116_attach);
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