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/*
* Linux-DVB Driver for DiBcom's DiB7000M and
* first generation DiB7000P-demodulator-family.
*
* Copyright (C) 2005-6 DiBcom (http://www.dibcom.fr/)
*
* 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, version 2.
*/
#include <linux/kernel.h>
#include <linux/i2c.h>
#include "dvb_frontend.h"
#include "dib7000m.h"
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "turn on debugging (default: 0)");
#define dprintk(args...) do { if (debug) { printk(KERN_DEBUG "DiB3000MC/P:"); printk(args); } } while (0)
struct dib7000m_state {
struct dvb_frontend demod;
struct dib7000m_config cfg;
u8 i2c_addr;
struct i2c_adapter *i2c_adap;
struct dibx000_i2c_master i2c_master;
/* offset is 1 in case of the 7000MC */
u8 reg_offs;
u16 wbd_ref;
u8 current_band;
fe_bandwidth_t current_bandwidth;
struct dibx000_agc_config *current_agc;
u32 timf[9];
u16 revision;
};
static u16 dib7000m_read_word(struct dib7000m_state *state, u16 reg)
{
u8 wb[2] = { (reg >> 8) | 0x80, reg & 0xff };
u8 rb[2];
struct i2c_msg msg[2] = {
{ .addr = state->i2c_addr >> 1, .flags = 0, .buf = wb, .len = 2 },
{ .addr = state->i2c_addr >> 1, .flags = I2C_M_RD, .buf = rb, .len = 2 },
};
if (i2c_transfer(state->i2c_adap, msg, 2) != 2)
dprintk("i2c read error on %d\n",reg);
return (rb[0] << 8) | rb[1];
}
/*
static int dib7000m_write_word(struct dib7000m_state *state, u16 reg, u16 val)
{
u8 b[4] = {
(reg >> 8) & 0xff, reg & 0xff,
(val >> 8) & 0xff, val & 0xff,
};
struct i2c_msg msg = {
.addr = state->i2c_addr >> 1, .flags = 0, .buf = b, .len = 4
};
return i2c_transfer(state->i2c_adap, &msg, 1) != 1 ? -EREMOTEIO : 0;
}
*/
static int dib7000m_get_frontend(struct dvb_frontend* fe,
struct dvb_frontend_parameters *fep)
{
struct dib7000m_state *state = fe->demodulator_priv;
u16 tps = dib7000m_read_word(state,480);
fep->inversion = INVERSION_AUTO;
fep->u.ofdm.bandwidth = state->current_bandwidth;
switch ((tps >> 8) & 0x2) {
case 0: fep->u.ofdm.transmission_mode = TRANSMISSION_MODE_2K; break;
case 1: fep->u.ofdm.transmission_mode = TRANSMISSION_MODE_8K; break;
/* case 2: fep->u.ofdm.transmission_mode = TRANSMISSION_MODE_4K; break; */
}
switch (tps & 0x3) {
case 0: fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_32; break;
case 1: fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_16; break;
case 2: fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_8; break;
case 3: fep->u.ofdm.guard_interval = GUARD_INTERVAL_1_4; break;
}
switch ((tps >> 14) & 0x3) {
case 0: fep->u.ofdm.constellation = QPSK; break;
case 1: fep->u.ofdm.constellation = QAM_16; break;
case 2:
default: fep->u.ofdm.constellation = QAM_64; break;
}
/* as long as the frontend_param structure is fixed for hierarchical transmission I refuse to use it */
/* (tps >> 13) & 0x1 == hrch is used, (tps >> 10) & 0x7 == alpha */
fep->u.ofdm.hierarchy_information = HIERARCHY_NONE;
switch ((tps >> 5) & 0x7) {
case 1: fep->u.ofdm.code_rate_HP = FEC_1_2; break;
case 2: fep->u.ofdm.code_rate_HP = FEC_2_3; break;
case 3: fep->u.ofdm.code_rate_HP = FEC_3_4; break;
case 5: fep->u.ofdm.code_rate_HP = FEC_5_6; break;
case 7:
default: fep->u.ofdm.code_rate_HP = FEC_7_8; break;
}
switch ((tps >> 2) & 0x7) {
case 1: fep->u.ofdm.code_rate_LP = FEC_1_2; break;
case 2: fep->u.ofdm.code_rate_LP = FEC_2_3; break;
case 3: fep->u.ofdm.code_rate_LP = FEC_3_4; break;
case 5: fep->u.ofdm.code_rate_LP = FEC_5_6; break;
case 7:
default: fep->u.ofdm.code_rate_LP = FEC_7_8; break;
}
/* native interleaver: (dib7000m_read_word(state, 481) >> 5) & 0x1 */
return 0;
}
static int dib7000m_set_frontend(struct dvb_frontend* fe,
struct dvb_frontend_parameters *fep)
{
return 0;
}
static int dib7000m_read_status(struct dvb_frontend *fe, fe_status_t *stat)
{
struct dib7000m_state *state = fe->demodulator_priv;
u16 lock = dib7000m_read_word(state, 509);
*stat = 0;
if (lock & 0x8000)
*stat |= FE_HAS_SIGNAL;
if (lock & 0x3000)
*stat |= FE_HAS_CARRIER;
if (lock & 0x0100)
*stat |= FE_HAS_VITERBI;
if (lock & 0x0010)
*stat |= FE_HAS_SYNC;
if (lock & 0x0008)
*stat |= FE_HAS_LOCK;
return 0;
}
static int dib7000m_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct dib7000m_state *state = fe->demodulator_priv;
*ber = (dib7000m_read_word(state, 526) << 16) | dib7000m_read_word(state, 527);
return 0;
}
static int dib7000m_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
{
struct dib7000m_state *state = fe->demodulator_priv;
*unc = dib7000m_read_word(state, 534);
return 0;
}
static int dib7000m_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
struct dib7000m_state *state = fe->demodulator_priv;
u16 val = dib7000m_read_word(state, 390);
*strength = 65535 - val;
return 0;
}
static int dib7000m_read_snr(struct dvb_frontend* fe, u16 *snr)
{
*snr = 0x0000;
return 0;
}
static int dib7000m_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
tune->min_delay_ms = 1000;
return 0;
}
static int dib7000m_init(struct dvb_frontend *fe)
{
return 0;
}
static int dib7000m_sleep(struct dvb_frontend *fe)
{
return 0;
}
static void dib7000m_release(struct dvb_frontend *fe)
{ }
static struct dvb_frontend_ops dib7000m_ops = {
.info = {
.name = "DiBcom 7000MA/MB/PA/PB/MC",
.type = FE_OFDM,
.frequency_min = 44250000,
.frequency_max = 867250000,
.frequency_stepsize = 62500,
.caps = FE_CAN_INVERSION_AUTO |
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_RECOVER |
FE_CAN_HIERARCHY_AUTO,
},
.release = dib7000m_release,
.init = dib7000m_init,
.sleep = dib7000m_sleep,
.set_frontend = dib7000m_set_frontend,
.get_tune_settings = dib7000m_fe_get_tune_settings,
.get_frontend = dib7000m_get_frontend,
.read_status = dib7000m_read_status,
.read_ber = dib7000m_read_ber,
.read_signal_strength = dib7000m_read_signal_strength,
.read_snr = dib7000m_read_snr,
.read_ucblocks = dib7000m_read_unc_blocks,
};
MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
MODULE_DESCRIPTION("Driver for the DiBcom 7000MA/MB/PA/PB/MC COFDM demodulator");
MODULE_LICENSE("GPL");
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