mt312.c

linux-2.6.15.6

	struct mt312_state *state = fe->demodulator_priv;
	const u8 volt_tab[3] = { 0x00, 0x40, 0x00 };

	if (v > SEC_VOLTAGE_OFF)
		return -EINVAL;

	return mt312_writereg(state, DISEQC_MODE, volt_tab[v]);
}

static int mt312_read_status(struct dvb_frontend* fe, fe_status_t *s)
{
	struct mt312_state *state = fe->demodulator_priv;
	int ret;
	u8 status[3];

	*s = 0;

	if ((ret = mt312_read(state, QPSK_STAT_H, status, sizeof(status))) < 0)
		return ret;

	dprintk(KERN_DEBUG "QPSK_STAT_H: 0x%02x, QPSK_STAT_L: 0x%02x, FEC_STATUS: 0x%02x\n", status[0], status[1], status[2]);

	if (status[0] & 0xc0)
		*s |= FE_HAS_SIGNAL;	/* signal noise ratio */
	if (status[0] & 0x04)
		*s |= FE_HAS_CARRIER;	/* qpsk carrier lock */
	if (status[2] & 0x02)
		*s |= FE_HAS_VITERBI;	/* viterbi lock */
	if (status[2] & 0x04)
		*s |= FE_HAS_SYNC;	/* byte align lock */
	if (status[0] & 0x01)
		*s |= FE_HAS_LOCK;	/* qpsk lock */

	return 0;
}

static int mt312_read_ber(struct dvb_frontend* fe, u32 *ber)
{
	struct mt312_state *state = fe->demodulator_priv;
	int ret;
	u8 buf[3];

	if ((ret = mt312_read(state, RS_BERCNT_H, buf, 3)) < 0)
		return ret;

	*ber = ((buf[0] << 16) | (buf[1] << 8) | buf[2]) * 64;

	return 0;
}

static int mt312_read_signal_strength(struct dvb_frontend* fe, u16 *signal_strength)
{
	struct mt312_state *state = fe->demodulator_priv;
	int ret;
	u8 buf[3];
	u16 agc;
	s16 err_db;

	if ((ret = mt312_read(state, AGC_H, buf, sizeof(buf))) < 0)
		return ret;

	agc = (buf[0] << 6) | (buf[1] >> 2);
	err_db = (s16) (((buf[1] & 0x03) << 14) | buf[2] << 6) >> 6;

	*signal_strength = agc;

	dprintk(KERN_DEBUG "agc=%08x err_db=%hd\n", agc, err_db);

	return 0;
}

static int mt312_read_snr(struct dvb_frontend* fe, u16 *snr)
{
	struct mt312_state *state = fe->demodulator_priv;
	int ret;
	u8 buf[2];

	if ((ret = mt312_read(state, M_SNR_H, &buf, sizeof(buf))) < 0)
		return ret;

	*snr = 0xFFFF - ((((buf[0] & 0x7f) << 8) | buf[1]) << 1);

	return 0;
}

static int mt312_read_ucblocks(struct dvb_frontend* fe, u32 *ubc)
{
	struct mt312_state *state = fe->demodulator_priv;
	int ret;
	u8 buf[2];

	if ((ret = mt312_read(state, RS_UBC_H, &buf, sizeof(buf))) < 0)
		return ret;

	*ubc = (buf[0] << 8) | buf[1];

	return 0;
}

static int mt312_set_frontend(struct dvb_frontend* fe,
			      struct dvb_frontend_parameters *p)
{
	struct mt312_state *state = fe->demodulator_priv;
	int ret;
	u8 buf[5], config_val;
	u16 sr;

	const u8 fec_tab[10] =
	    { 0x00, 0x01, 0x02, 0x04, 0x3f, 0x08, 0x10, 0x20, 0x3f, 0x3f };
	const u8 inv_tab[3] = { 0x00, 0x40, 0x80 };

	dprintk("%s: Freq %d\n", __FUNCTION__, p->frequency);

	if ((p->frequency < fe->ops->info.frequency_min)
	    || (p->frequency > fe->ops->info.frequency_max))
		return -EINVAL;

	if ((p->inversion < INVERSION_OFF)
	    || (p->inversion > INVERSION_ON))
		return -EINVAL;

	if ((p->u.qpsk.symbol_rate < fe->ops->info.symbol_rate_min)
	    || (p->u.qpsk.symbol_rate > fe->ops->info.symbol_rate_max))
		return -EINVAL;

	if ((p->u.qpsk.fec_inner < FEC_NONE)
	    || (p->u.qpsk.fec_inner > FEC_AUTO))
		return -EINVAL;

	if ((p->u.qpsk.fec_inner == FEC_4_5)
	    || (p->u.qpsk.fec_inner == FEC_8_9))
		return -EINVAL;

	switch (state->id) {
	case ID_VP310:
	// For now we will do this only for the VP310.
	// It should be better for the mt312 as well, but tunning will be slower. ACCJr 09/29/03
		if ((ret = mt312_readreg(state, CONFIG, &config_val) < 0))
			return ret;
		if (p->u.qpsk.symbol_rate >= 30000000) //Note that 30MS/s should use 90MHz
		{
			if ((config_val & 0x0c) == 0x08) { //We are running 60MHz
				state->frequency = 90;
				if ((ret = mt312_initfe(fe)) < 0)
					return ret;
			}
		}
		else
		{
			if ((config_val & 0x0c) == 0x0C) { //We are running 90MHz
				state->frequency = 60;
				if ((ret = mt312_initfe(fe)) < 0)
					return ret;
			}
		}
		break;

	case ID_MT312:
		break;

	default:
		return -EINVAL;
	}

	mt312_writereg(state, GPP_CTRL, 0x40);
	state->config->pll_set(fe, p);
	mt312_writereg(state, GPP_CTRL, 0x00);

	/* sr = (u16)(sr * 256.0 / 1000000.0) */
	sr = mt312_div(p->u.qpsk.symbol_rate * 4, 15625);

	/* SYM_RATE */
	buf[0] = (sr >> 8) & 0x3f;
	buf[1] = (sr >> 0) & 0xff;

	/* VIT_MODE */
	buf[2] = inv_tab[p->inversion] | fec_tab[p->u.qpsk.fec_inner];

	/* QPSK_CTRL */
	buf[3] = 0x40;		/* swap I and Q before QPSK demodulation */

	if (p->u.qpsk.symbol_rate < 10000000)
		buf[3] |= 0x04;	/* use afc mode */

	/* GO */
	buf[4] = 0x01;

	if ((ret = mt312_write(state, SYM_RATE_H, buf, sizeof(buf))) < 0)
		return ret;

	mt312_reset(state, 0);

	return 0;
}

static int mt312_get_frontend(struct dvb_frontend* fe,
			      struct dvb_frontend_parameters *p)
{
	struct mt312_state *state = fe->demodulator_priv;
	int ret;

	if ((ret = mt312_get_inversion(state, &p->inversion)) < 0)
		return ret;

	if ((ret = mt312_get_symbol_rate(state, &p->u.qpsk.symbol_rate)) < 0)
		return ret;

	if ((ret = mt312_get_code_rate(state, &p->u.qpsk.fec_inner)) < 0)
		return ret;

	return 0;
}

static int mt312_sleep(struct dvb_frontend* fe)
{
	struct mt312_state *state = fe->demodulator_priv;
	int ret;
	u8 config;

	/* reset all registers to defaults */
	if ((ret = mt312_reset(state, 1)) < 0)
		return ret;

	if ((ret = mt312_readreg(state, CONFIG, &config)) < 0)
		return ret;

	/* enter standby */
	if ((ret = mt312_writereg(state, CONFIG, config & 0x7f)) < 0)
		return ret;

	return 0;
}

static int mt312_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
{
	fesettings->min_delay_ms = 50;
	fesettings->step_size = 0;
	fesettings->max_drift = 0;
	return 0;
}

static void mt312_release(struct dvb_frontend* fe)
{
	struct mt312_state* state = fe->demodulator_priv;
	kfree(state);
}

static struct dvb_frontend_ops vp310_mt312_ops;

struct dvb_frontend* vp310_attach(const struct mt312_config* config,
				  struct i2c_adapter* i2c)
{
	struct mt312_state* state = NULL;

	/* allocate memory for the internal state */
	state = kmalloc(sizeof(struct mt312_state), GFP_KERNEL);
	if (state == NULL)
		goto error;

	/* setup the state */
	state->config = config;
	state->i2c = i2c;
	memcpy(&state->ops, &vp310_mt312_ops, sizeof(struct dvb_frontend_ops));
	strcpy(state->ops.info.name, "Zarlink VP310 DVB-S");

	/* check if the demod is there */
	if (mt312_readreg(state, ID, &state->id) < 0)
		goto error;
	if (state->id != ID_VP310) {
		goto error;
	}

	/* create dvb_frontend */
	state->frequency = 90;
	state->frontend.ops = &state->ops;
	state->frontend.demodulator_priv = state;
	return &state->frontend;

error:
	kfree(state);
	return NULL;
}

struct dvb_frontend* mt312_attach(const struct mt312_config* config,
				  struct i2c_adapter* i2c)
{
	struct mt312_state* state = NULL;

	/* allocate memory for the internal state */
	state = kmalloc(sizeof(struct mt312_state), GFP_KERNEL);
	if (state == NULL)
		goto error;

	/* setup the state */
	state->config = config;
	state->i2c = i2c;
	memcpy(&state->ops, &vp310_mt312_ops, sizeof(struct dvb_frontend_ops));
	strcpy(state->ops.info.name, "Zarlink MT312 DVB-S");

	/* check if the demod is there */
	if (mt312_readreg(state, ID, &state->id) < 0)
		goto error;
	if (state->id != ID_MT312) {
		goto error;
	}

	/* create dvb_frontend */
	state->frequency = 60;
	state->frontend.ops = &state->ops;
	state->frontend.demodulator_priv = state;
	return &state->frontend;

error:
	kfree(state);
	return NULL;
}

static struct dvb_frontend_ops vp310_mt312_ops = {

	.info = {
		.name = "Zarlink ???? DVB-S",
		.type = FE_QPSK,
		.frequency_min = 950000,
		.frequency_max = 2150000,
		.frequency_stepsize = (MT312_PLL_CLK / 1000) / 128,
		.symbol_rate_min = MT312_SYS_CLK / 128,
		.symbol_rate_max = MT312_SYS_CLK / 2,
		.caps =
		    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_MUTE_TS |
		    FE_CAN_RECOVER
	},

	.release = mt312_release,

	.init = mt312_initfe,
	.sleep = mt312_sleep,

	.set_frontend = mt312_set_frontend,
	.get_frontend = mt312_get_frontend,
	.get_tune_settings = mt312_get_tune_settings,

	.read_status = mt312_read_status,
	.read_ber = mt312_read_ber,
	.read_signal_strength = mt312_read_signal_strength,
	.read_snr = mt312_read_snr,
	.read_ucblocks = mt312_read_ucblocks,

	.diseqc_send_master_cmd = mt312_send_master_cmd,
	.diseqc_send_burst = mt312_send_burst,
	.set_tone = mt312_set_tone,
	.set_voltage = mt312_set_voltage,
};

module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

MODULE_DESCRIPTION("Zarlink VP310/MT312 DVB-S Demodulator driver");
MODULE_AUTHOR("Andreas Oberritter <[e-mail]>");
MODULE_LICENSE("GPL");

EXPORT_SYMBOL(mt312_attach);
EXPORT_SYMBOL(vp310_attach);