dib3000mb.c

h内核

	else
		inv_test1 = 2;

	dds_val = ((rd(DIB3000MB_REG_DDS_FREQ_MSB) & 0xff) << 16) + rd(DIB3000MB_REG_DDS_FREQ_LSB);
	deb_getf("DDS_FREQ: %x %x %x",dds_val, rd(DIB3000MB_REG_DDS_FREQ_MSB), rd(DIB3000MB_REG_DDS_FREQ_LSB));
	if (dds_val < threshold)
		inv_test2 = 0;
	else if (dds_val == threshold)
		inv_test2 = 1;
	else
		inv_test2 = 2;

	fep->inversion =
		((inv_test2 == 2) && (inv_test1==1 || inv_test1==0)) ||
		((inv_test2 == 0) && (inv_test1==1 || inv_test1==2)) ?
		INVERSION_ON : INVERSION_OFF;

	deb_getf("inversion %d %d, %d\n", inv_test2, inv_test1, fep->inversion);

	switch ((tps_val = rd(DIB3000MB_REG_TPS_QAM))) {
		case DIB3000_CONSTELLATION_QPSK:
			deb_getf("QPSK ");
			ofdm->constellation = QPSK;
			break;
		case DIB3000_CONSTELLATION_16QAM:
			deb_getf("QAM16 ");
			ofdm->constellation = QAM_16;
			break;
		case DIB3000_CONSTELLATION_64QAM:
			deb_getf("QAM64 ");
			ofdm->constellation = QAM_64;
			break;
		default:
			err("Unexpected constellation returned by TPS (%d)", tps_val);
			break;
 	}
	deb_getf("TPS: %d\n", tps_val);

	if (rd(DIB3000MB_REG_TPS_HRCH)) {
		deb_getf("HRCH ON\n");
		cr = &ofdm->code_rate_LP;
		ofdm->code_rate_HP = FEC_NONE;
		switch ((tps_val = rd(DIB3000MB_REG_TPS_VIT_ALPHA))) {
			case DIB3000_ALPHA_0:
				deb_getf("HIERARCHY_NONE ");
				ofdm->hierarchy_information = HIERARCHY_NONE;
				break;
			case DIB3000_ALPHA_1:
				deb_getf("HIERARCHY_1 ");
				ofdm->hierarchy_information = HIERARCHY_1;
				break;
			case DIB3000_ALPHA_2:
				deb_getf("HIERARCHY_2 ");
				ofdm->hierarchy_information = HIERARCHY_2;
				break;
			case DIB3000_ALPHA_4:
				deb_getf("HIERARCHY_4 ");
				ofdm->hierarchy_information = HIERARCHY_4;
				break;
			default:
				err("Unexpected ALPHA value returned by TPS (%d)", tps_val);
				break;
		}
		deb_getf("TPS: %d\n", tps_val);

		tps_val = rd(DIB3000MB_REG_TPS_CODE_RATE_LP);
	} else {
		deb_getf("HRCH OFF\n");
		cr = &ofdm->code_rate_HP;
		ofdm->code_rate_LP = FEC_NONE;
		ofdm->hierarchy_information = HIERARCHY_NONE;

		tps_val = rd(DIB3000MB_REG_TPS_CODE_RATE_HP);
	}

	switch (tps_val) {
		case DIB3000_FEC_1_2:
			deb_getf("FEC_1_2 ");
			*cr = FEC_1_2;
			break;
		case DIB3000_FEC_2_3:
			deb_getf("FEC_2_3 ");
			*cr = FEC_2_3;
			break;
		case DIB3000_FEC_3_4:
			deb_getf("FEC_3_4 ");
			*cr = FEC_3_4;
			break;
		case DIB3000_FEC_5_6:
			deb_getf("FEC_5_6 ");
			*cr = FEC_4_5;
			break;
		case DIB3000_FEC_7_8:
			deb_getf("FEC_7_8 ");
			*cr = FEC_7_8;
			break;
		default:
			err("Unexpected FEC returned by TPS (%d)", tps_val);
			break;
	}
	deb_getf("TPS: %d\n",tps_val);

	switch ((tps_val = rd(DIB3000MB_REG_TPS_GUARD_TIME))) {
		case DIB3000_GUARD_TIME_1_32:
			deb_getf("GUARD_INTERVAL_1_32 ");
			ofdm->guard_interval = GUARD_INTERVAL_1_32;
			break;
		case DIB3000_GUARD_TIME_1_16:
			deb_getf("GUARD_INTERVAL_1_16 ");
			ofdm->guard_interval = GUARD_INTERVAL_1_16;
			break;
		case DIB3000_GUARD_TIME_1_8:
			deb_getf("GUARD_INTERVAL_1_8 ");
			ofdm->guard_interval = GUARD_INTERVAL_1_8;
			break;
		case DIB3000_GUARD_TIME_1_4:
			deb_getf("GUARD_INTERVAL_1_4 ");
			ofdm->guard_interval = GUARD_INTERVAL_1_4;
			break;
		default:
			err("Unexpected Guard Time returned by TPS (%d)", tps_val);
			break;
	}
	deb_getf("TPS: %d\n", tps_val);

	switch ((tps_val = rd(DIB3000MB_REG_TPS_FFT))) {
		case DIB3000_TRANSMISSION_MODE_2K:
			deb_getf("TRANSMISSION_MODE_2K ");
			ofdm->transmission_mode = TRANSMISSION_MODE_2K;
			break;
		case DIB3000_TRANSMISSION_MODE_8K:
			deb_getf("TRANSMISSION_MODE_8K ");
			ofdm->transmission_mode = TRANSMISSION_MODE_8K;
			break;
		default:
			err("unexpected transmission mode return by TPS (%d)", tps_val);
			break;
	}
	deb_getf("TPS: %d\n", tps_val);

	return 0;
}

static int dib3000mb_read_status(struct dvb_frontend* fe, fe_status_t *stat)
{
	struct dib3000_state* state = (struct dib3000_state*) fe->demodulator_priv;

	*stat = 0;

	if (rd(DIB3000MB_REG_AGC_LOCK))
		*stat |= FE_HAS_SIGNAL;
	if (rd(DIB3000MB_REG_CARRIER_LOCK))
		*stat |= FE_HAS_CARRIER;
	if (rd(DIB3000MB_REG_VIT_LCK))
		*stat |= FE_HAS_VITERBI;
	if (rd(DIB3000MB_REG_TS_SYNC_LOCK))
		*stat |= (FE_HAS_SYNC | FE_HAS_LOCK);

	deb_info("actual status is %2x\n",*stat);

	deb_getf("tps %x %x %x %x %x\n",
			rd(DIB3000MB_REG_TPS_1),
			rd(DIB3000MB_REG_TPS_2),
			rd(DIB3000MB_REG_TPS_3),
			rd(DIB3000MB_REG_TPS_4),
			rd(DIB3000MB_REG_TPS_5));
	
	deb_info("autoval: tps: %d, qam: %d, hrch: %d, alpha: %d, hp: %d, lp: %d, guard: %d, fft: %d cell: %d\n",
			rd(DIB3000MB_REG_TPS_LOCK),
			rd(DIB3000MB_REG_TPS_QAM),
			rd(DIB3000MB_REG_TPS_HRCH),
			rd(DIB3000MB_REG_TPS_VIT_ALPHA),
			rd(DIB3000MB_REG_TPS_CODE_RATE_HP),
			rd(DIB3000MB_REG_TPS_CODE_RATE_LP),
			rd(DIB3000MB_REG_TPS_GUARD_TIME),
			rd(DIB3000MB_REG_TPS_FFT),
			rd(DIB3000MB_REG_TPS_CELL_ID));

	//*stat = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
	return 0;
}

static int dib3000mb_read_ber(struct dvb_frontend* fe, u32 *ber)
{
	struct dib3000_state* state = (struct dib3000_state*) fe->demodulator_priv;

	*ber = ((rd(DIB3000MB_REG_BER_MSB) << 16) | rd(DIB3000MB_REG_BER_LSB) );
	return 0;
}
/*
 * Amaury:
 * signal strength is measured with dBm (power compared to mW)
 * the standard range is -90dBm(low power) to -10 dBm (strong power),
 * but the calibration is done for -100 dBm to 0dBm
 */

#define DIB3000MB_AGC_REF_dBm		-14
#define DIB3000MB_GAIN_SLOPE_dBm	100
#define DIB3000MB_GAIN_DELTA_dBm	-2
static int dib3000mb_read_signal_strength(struct dvb_frontend* fe, u16 *strength)
{
	struct dib3000_state* state = (struct dib3000_state*) fe->demodulator_priv;

/* TODO log10 
	u16 sigpow = rd(DIB3000MB_REG_SIGNAL_POWER), 
		n_agc_power = rd(DIB3000MB_REG_AGC_POWER),
		rf_power = rd(DIB3000MB_REG_RF_POWER);
	double rf_power_dBm, ad_power_dBm, minar_power_dBm;
	
	if (n_agc_power == 0 )
		n_agc_power = 1 ;

	ad_power_dBm    = 10 * log10 ( (float)n_agc_power / (float)(1<<16) );
	minor_power_dBm = ad_power_dBm - DIB3000MB_AGC_REF_dBm;
	rf_power_dBm = (-DIB3000MB_GAIN_SLOPE_dBm * (float)rf_power / (float)(1<<16) + 
			DIB3000MB_GAIN_DELTA_dBm) + minor_power_dBm;
	// relative rf_power 
	*strength = (u16) ((rf_power_dBm + 100) / 100 * 0xffff);
*/
	*strength = rd(DIB3000MB_REG_SIGNAL_POWER) * 0xffff / 0x170;
	return 0;
}

/*
 * Amaury: 
 * snr is the signal quality measured in dB.
 * snr = 10*log10(signal power / noise power)
 * the best quality is near 35dB (cable transmission & good modulator)
 * the minimum without errors depend of transmission parameters
 * some indicative values are given in en300744 Annex A
 * ex : 16QAM 2/3 (Gaussian)  = 11.1 dB
 *
 * If SNR is above 20dB, BER should be always 0.
 * choose 0dB as the minimum
 */
static int dib3000mb_read_snr(struct dvb_frontend* fe, u16 *snr)
{
	struct dib3000_state* state = (struct dib3000_state*) fe->demodulator_priv;
	short sigpow = rd(DIB3000MB_REG_SIGNAL_POWER);
	int icipow = ((rd(DIB3000MB_REG_NOISE_POWER_MSB) & 0xff) << 16) |
		rd(DIB3000MB_REG_NOISE_POWER_LSB);
/*
	float snr_dBm=0;

	if (sigpow > 0 && icipow > 0)
		snr_dBm = 10.0 * log10( (float) (sigpow<<8) / (float)icipow )  ;
	else if (sigpow > 0)
		snr_dBm = 35;
	
	*snr = (u16) ((snr_dBm / 35) * 0xffff);
*/
	*snr = (sigpow << 8) / ((icipow > 0) ? icipow : 1);
	return 0;
}

static int dib3000mb_read_unc_blocks(struct dvb_frontend* fe, u32 *unc)
{
	struct dib3000_state* state = (struct dib3000_state*) fe->demodulator_priv;

	*unc = rd(DIB3000MB_REG_UNC);
	return 0;
}

static int dib3000mb_sleep(struct dvb_frontend* fe)
{
	struct dib3000_state* state = (struct dib3000_state*) fe->demodulator_priv;

	wr(DIB3000MB_REG_POWER_CONTROL,DIB3000MB_POWER_DOWN);
	return 0;
}

static int dib3000mb_fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
	tune->min_delay_ms = 800;
	tune->step_size = 166667;
	tune->max_drift = 166667*2;
					
	return 0;
}

static int dib3000mb_fe_init_nonmobile(struct dvb_frontend* fe)
{
	return dib3000mb_fe_init(fe, 0);
}

static int dib3000mb_set_frontend_and_tuner(struct dvb_frontend* fe, struct dvb_frontend_parameters *fep)
{
	return dib3000mb_set_frontend(fe, fep, 1);
}

static void dib3000mb_release(struct dvb_frontend* fe)
{
	struct dib3000_state *state = (struct dib3000_state*) fe->demodulator_priv;
	kfree(state);
}

/* pid filter and transfer stuff */
static int dib3000mb_pid_control(struct dvb_frontend *fe,int index, int pid,int onoff)
{
	struct dib3000_state *state = fe->demodulator_priv;
	pid = (onoff ? pid | DIB3000_ACTIVATE_PID_FILTERING : 0);
		wr(index+DIB3000MB_REG_FIRST_PID,pid);
	return 0;
}

static int dib3000mb_fifo_control(struct dvb_frontend *fe, int onoff)
{
	struct dib3000_state *state = (struct dib3000_state*) fe->demodulator_priv;

	deb_xfer("%s fifo\n",onoff ? "enabling" : "disabling");
	if (onoff) {
		wr(DIB3000MB_REG_FIFO, DIB3000MB_FIFO_ACTIVATE);
	} else {
		wr(DIB3000MB_REG_FIFO, DIB3000MB_FIFO_INHIBIT);
	}
	return 0;
	}

static int dib3000mb_pid_parse(struct dvb_frontend *fe, int onoff)
{
	//struct dib3000_state *state = fe->demodulator_priv;
	/* switch it off and on */
	return 0;
	}

static int dib3000mb_tuner_pass_ctrl(struct dvb_frontend *fe, int onoff, u8 pll_addr)
{
	struct dib3000_state *state = (struct dib3000_state*) fe->demodulator_priv;
	if (onoff) {
		wr(DIB3000MB_REG_TUNER, DIB3000_TUNER_WRITE_ENABLE(pll_addr));
	} else {
		wr(DIB3000MB_REG_TUNER, DIB3000_TUNER_WRITE_DISABLE(pll_addr));
	}
	return 0;
}

static struct dvb_frontend_ops dib3000mb_ops;

struct dvb_frontend* dib3000mb_attach(const struct dib3000_config* config,
				      struct i2c_adapter* i2c, struct dib_fe_xfer_ops *xfer_ops)
{
	struct dib3000_state* state = NULL;

	/* allocate memory for the internal state */
	state = (struct dib3000_state*) kmalloc(sizeof(struct dib3000_state), GFP_KERNEL);
	if (state == NULL)
		goto error;

	/* setup the state */
	state->i2c = i2c;
	memcpy(&state->config,config,sizeof(struct dib3000_config));
	memcpy(&state->ops, &dib3000mb_ops, sizeof(struct dvb_frontend_ops));

	/* check for the correct demod */
	if (rd(DIB3000_REG_MANUFACTOR_ID) != DIB3000_I2C_ID_DIBCOM)
		goto error;

	if (rd(DIB3000_REG_DEVICE_ID) != DIB3000MB_DEVICE_ID)
		goto error;

	/* create dvb_frontend */
	state->frontend.ops = &state->ops;
	state->frontend.demodulator_priv = state;

	/* set the xfer operations */
	xfer_ops->pid_parse = dib3000mb_pid_parse;
	xfer_ops->fifo_ctrl = dib3000mb_fifo_control;
	xfer_ops->pid_ctrl = dib3000mb_pid_control;
	xfer_ops->tuner_pass_ctrl = dib3000mb_tuner_pass_ctrl;

	return &state->frontend;

error:
	if (state)
	kfree(state);
	return NULL;
	}

static struct dvb_frontend_ops dib3000mb_ops = {

	.info = {
		.name			= "DiBcom 3000-MB DVB-T",
		.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 = dib3000mb_release,

	.init = dib3000mb_fe_init_nonmobile,
	.sleep = dib3000mb_sleep,

	.set_frontend = dib3000mb_set_frontend_and_tuner,
	.get_frontend = dib3000mb_get_frontend,
	.get_tune_settings = dib3000mb_fe_get_tune_settings,

	.read_status = dib3000mb_read_status,
	.read_ber = dib3000mb_read_ber,
	.read_signal_strength = dib3000mb_read_signal_strength,
	.read_snr = dib3000mb_read_snr,
	.read_ucblocks = dib3000mb_read_unc_blocks,
};

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");

EXPORT_SYMBOL(dib3000mb_attach);