dst.c

h内核

	}
	if (i >= sizeof(dst_tlist) / sizeof(dst_tlist[0])) {
		printk("%s: unable to recognize %s or %s\n", __FUNCTION__, &rxbuf[0], &rxbuf[1]);
		printk("%s please email [e-mail] with this type in\n", __FUNCTION__);
		use_dst_type = DST_TYPE_IS_SAT;
		use_type_flags = DST_TYPE_HAS_SYMDIV;
	}
	dst_type_print(use_dst_type);

	state->type_flags = use_type_flags;
	state->dst_type = use_dst_type;
	dst_type_flags_print(state->type_flags);

	if (state->type_flags & DST_TYPE_HAS_TS204) {
		dst_packsize(state, 204);
	}
	return 0;
}

static int dst_command(struct dst_state* state, u8 * data, u8 len)
{
	int retval;
	u8 reply;

	dst_i2c_enable(state);
	dst_reset8820(state);
	retval = write_dst(state, data, len);
	if (retval < 0) {
		dst_i2c_disable(state);
		dprintk("%s: write not successful\n", __FUNCTION__);
		return retval;
	}
	msleep(33);
	retval = read_dst(state, &reply, 1);
	dst_i2c_disable(state);
	if (retval < 0) {
		dprintk("%s: read verify  not successful\n", __FUNCTION__);
		return retval;
	}
	if (reply != 0xff) {
		dprintk("%s: write reply not 0xff 0x%02x \n", __FUNCTION__, reply);
		return 0;
	}
	if (len >= 2 && data[0] == 0 && (data[1] == 1 || data[1] == 3))
		return 0;
	if (!dst_wait_dst_ready(state))
		return 0;
	// dst_i2c_enable(i2c); Per dimitri
	retval = read_dst(state, state->rxbuffer, 8);
	dst_i2c_disable(state);
	if (retval < 0) {
		dprintk("%s: read not successful\n", __FUNCTION__);
		return 0;
	}
	if (state->rxbuffer[7] != dst_check_sum(state->rxbuffer, 7)) {
		dprintk("%s: checksum failure\n", __FUNCTION__);
		return 0;
	}
	return 0;
}

static int dst_get_signal(struct dst_state* state)
{
	int retval;
	u8 get_signal[] = { 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfb };

	if ((state->diseq_flags & ATTEMPT_TUNE) == 0) {
		state->decode_lock = state->decode_strength = state->decode_snr = 0;
		return 0;
	}
	if (0 == (state->diseq_flags & HAS_LOCK)) {
		state->decode_lock = state->decode_strength = state->decode_snr = 0;
		return 0;
	}
	if (time_after_eq(jiffies, state->cur_jiff + (HZ / 5))) {
		retval = dst_command(state, get_signal, 8);
		if (retval < 0)
			return retval;
		if (state->dst_type == DST_TYPE_IS_SAT) {
			state->decode_lock = ((state->rxbuffer[6] & 0x10) == 0) ? 1 : 0;
			state->decode_strength = state->rxbuffer[5] << 8;
			state->decode_snr = state->rxbuffer[2] << 8 | state->rxbuffer[3];
		} else if ((state->dst_type == DST_TYPE_IS_TERR) || (state->dst_type == DST_TYPE_IS_CABLE)) {
			state->decode_lock = (state->rxbuffer[1]) ? 1 : 0;
			state->decode_strength = state->rxbuffer[4] << 8;
			state->decode_snr = state->rxbuffer[3] << 8;
		}
		state->cur_jiff = jiffies;
	}
	return 0;
}

static int dst_tone_power_cmd(struct dst_state* state)
{
	u8 paket[8] = { 0x00, 0x09, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00 };

	if (state->dst_type == DST_TYPE_IS_TERR)
		return 0;

	if (state->voltage == SEC_VOLTAGE_OFF)
		paket[4] = 0;
	else
		paket[4] = 1;
	if (state->tone == SEC_TONE_ON)
		paket[2] = state->k22;
	else
		paket[2] = 0;
	paket[7] = dst_check_sum(&paket[0], 7);
	dst_command(state, paket, 8);
	return 0;
}

static int dst_get_tuna(struct dst_state* state)
{
	int retval;
	if ((state->diseq_flags & ATTEMPT_TUNE) == 0)
		return 0;
	state->diseq_flags &= ~(HAS_LOCK);
	if (!dst_wait_dst_ready(state))
		return 0;
	if (state->type_flags & DST_TYPE_HAS_NEWTUNE) {
		/* how to get variable length reply ???? */
		retval = read_dst(state, state->rx_tuna, 10);
	} else {
		retval = read_dst(state, &state->rx_tuna[2], 8);
	}
	if (retval < 0) {
		dprintk("%s: read not successful\n", __FUNCTION__);
		return 0;
	}
	if (state->type_flags & DST_TYPE_HAS_NEWTUNE) {
		if (state->rx_tuna[9] != dst_check_sum(&state->rx_tuna[0], 9)) {
			dprintk("%s: checksum failure?\n", __FUNCTION__);
			return 0;
		}
	} else {
		if (state->rx_tuna[9] != dst_check_sum(&state->rx_tuna[2], 7)) {
			dprintk("%s: checksum failure?\n", __FUNCTION__);
			return 0;
		}
	}
	if (state->rx_tuna[2] == 0 && state->rx_tuna[3] == 0)
		return 0;
	state->decode_freq = ((state->rx_tuna[2] & 0x7f) << 8) + state->rx_tuna[3];

	state->decode_lock = 1;
	/*
	   dst->decode_n1 = (dst->rx_tuna[4] << 8) +
	   (dst->rx_tuna[5]);

	   dst->decode_n2 = (dst->rx_tuna[8] << 8) +
	   (dst->rx_tuna[7]);
	 */
	state->diseq_flags |= HAS_LOCK;
	/* dst->cur_jiff = jiffies; */
	return 1;
}

static int dst_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage);

static int dst_write_tuna(struct dvb_frontend* fe)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;
	int retval;
	u8 reply;

	dprintk("%s: type_flags 0x%x \n", __FUNCTION__, state->type_flags);
	state->decode_freq = 0;
	state->decode_lock = state->decode_strength = state->decode_snr = 0;
	if (state->dst_type == DST_TYPE_IS_SAT) {
		if (!(state->diseq_flags & HAS_POWER))
			dst_set_voltage(fe, SEC_VOLTAGE_13);
	}
	state->diseq_flags &= ~(HAS_LOCK | ATTEMPT_TUNE);
	dst_i2c_enable(state);
	if (state->type_flags & DST_TYPE_HAS_NEWTUNE) {
		dst_reset8820(state);
		state->tx_tuna[9] = dst_check_sum(&state->tx_tuna[0], 9);
		retval = write_dst(state, &state->tx_tuna[0], 10);
	} else {
		state->tx_tuna[9] = dst_check_sum(&state->tx_tuna[2], 7);
		retval = write_dst(state, &state->tx_tuna[2], 8);
	}
	if (retval < 0) {
		dst_i2c_disable(state);
		dprintk("%s: write not successful\n", __FUNCTION__);
		return retval;
	}
	msleep(3);
	retval = read_dst(state, &reply, 1);
	dst_i2c_disable(state);
	if (retval < 0) {
		dprintk("%s: read verify  not successful\n", __FUNCTION__);
		return retval;
	}
	if (reply != 0xff) {
		dprintk("%s: write reply not 0xff 0x%02x \n", __FUNCTION__, reply);
		return 0;
	}
	state->diseq_flags |= ATTEMPT_TUNE;
	return dst_get_tuna(state);
}

/*
 * line22k0    0x00, 0x09, 0x00, 0xff, 0x01, 0x00, 0x00, 0x00
 * line22k1    0x00, 0x09, 0x01, 0xff, 0x01, 0x00, 0x00, 0x00
 * line22k2    0x00, 0x09, 0x02, 0xff, 0x01, 0x00, 0x00, 0x00
 * tone        0x00, 0x09, 0xff, 0x00, 0x01, 0x00, 0x00, 0x00
 * data        0x00, 0x09, 0xff, 0x01, 0x01, 0x00, 0x00, 0x00
 * power_off   0x00, 0x09, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00
 * power_on    0x00, 0x09, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00
 * Diseqc 1    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf0, 0xec
 * Diseqc 2    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf4, 0xe8
 * Diseqc 3    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf8, 0xe4
 * Diseqc 4    0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xfc, 0xe0
 */

static int dst_set_diseqc(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;
	u8 paket[8] = { 0x00, 0x08, 0x04, 0xe0, 0x10, 0x38, 0xf0, 0xec };

	if (state->dst_type == DST_TYPE_IS_TERR)
		return 0;

	if (cmd->msg_len == 0 || cmd->msg_len > 4)
		return -EINVAL;
	memcpy(&paket[3], cmd->msg, cmd->msg_len);
	paket[7] = dst_check_sum(&paket[0], 7);
	dst_command(state, paket, 8);
	return 0;
}

static int dst_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
	u8 *val;
	int need_cmd;
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	state->voltage = voltage;

	if (state->dst_type == DST_TYPE_IS_TERR)
		return 0;

	need_cmd = 0;
	val = &state->tx_tuna[0];
	val[8] &= ~0x40;
	switch (voltage) {
	case SEC_VOLTAGE_13:
		if ((state->diseq_flags & HAS_POWER) == 0)
			need_cmd = 1;
		state->diseq_flags |= HAS_POWER;
		break;
	case SEC_VOLTAGE_18:
		if ((state->diseq_flags & HAS_POWER) == 0)
			need_cmd = 1;
		state->diseq_flags |= HAS_POWER;
		val[8] |= 0x40;
		break;
	case SEC_VOLTAGE_OFF:
		need_cmd = 1;
		state->diseq_flags &= ~(HAS_POWER | HAS_LOCK | ATTEMPT_TUNE);
		break;
	default:
		return -EINVAL;
	}
	if (need_cmd) {
		dst_tone_power_cmd(state);
	}
	return 0;
}

static int dst_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
	u8 *val;
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	state->tone = tone;

	if (state->dst_type == DST_TYPE_IS_TERR)
		return 0;

	val = &state->tx_tuna[0];

	val[8] &= ~0x1;

	switch (tone) {
	case SEC_TONE_OFF:
		break;
	case SEC_TONE_ON:
		val[8] |= 1;
		break;
	default:
		return -EINVAL;
	}
	dst_tone_power_cmd(state);
	return 0;
}

static int dst_init(struct dvb_frontend* fe)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;
	static u8 ini_satci_tuna[] = { 9, 0, 3, 0xb6, 1, 0, 0x73, 0x21, 0, 0 };
	static u8 ini_satfta_tuna[] = { 0, 0, 3, 0xb6, 1, 0x55, 0xbd, 0x50, 0, 0 };
	static u8 ini_tvfta_tuna[] = { 0, 0, 3, 0xb6, 1, 7, 0x0, 0x0, 0, 0 };
	static u8 ini_tvci_tuna[] = { 9, 0, 3, 0xb6, 1, 7, 0x0, 0x0, 0, 0 };
	static u8 ini_cabfta_tuna[] = { 0, 0, 3, 0xb6, 1, 7, 0x0, 0x0, 0, 0 };
	static u8 ini_cabci_tuna[] = { 9, 0, 3, 0xb6, 1, 7, 0x0, 0x0, 0, 0 };
	state->inversion = INVERSION_ON;
	state->voltage = SEC_VOLTAGE_13;
	state->tone = SEC_TONE_OFF;
	state->symbol_rate = 29473000;
	state->fec = FEC_AUTO;
	state->diseq_flags = 0;
	state->k22 = 0x02;
	state->bandwidth = BANDWIDTH_7_MHZ;
	state->cur_jiff = jiffies;
	if (state->dst_type == DST_TYPE_IS_SAT) {
		state->frequency = 950000;
		memcpy(state->tx_tuna, ((state->type_flags & DST_TYPE_HAS_NEWTUNE) ? ini_satci_tuna : ini_satfta_tuna), sizeof(ini_satfta_tuna));
	} else if (state->dst_type == DST_TYPE_IS_TERR) {
		state->frequency = 137000000;
		memcpy(state->tx_tuna, ((state->type_flags & DST_TYPE_HAS_NEWTUNE) ? ini_tvci_tuna : ini_tvfta_tuna), sizeof(ini_tvfta_tuna));
	} else if (state->dst_type == DST_TYPE_IS_CABLE) {
		state->frequency = 51000000;
		memcpy(state->tx_tuna, ((state->type_flags & DST_TYPE_HAS_NEWTUNE) ? ini_cabci_tuna : ini_cabfta_tuna), sizeof(ini_cabfta_tuna));
	}

	return 0;
}

static int dst_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	*status = 0;
	if (state->diseq_flags & HAS_LOCK) {
		dst_get_signal(state);
		if (state->decode_lock)
			*status |= FE_HAS_LOCK | FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_SYNC | FE_HAS_VITERBI;
	}

	return 0;
}

static int dst_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	dst_get_signal(state);
	*strength = state->decode_strength;

	return 0;
}

static int dst_read_snr(struct dvb_frontend* fe, u16* snr)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	dst_get_signal(state);
	*snr = state->decode_snr;

	return 0;
}

static int dst_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	dst_set_freq(state, p->frequency);
	dst_set_inversion(state, p->inversion);
	if (state->dst_type == DST_TYPE_IS_SAT) {
		dst_set_fec(state, p->u.qpsk.fec_inner);
		dst_set_symbolrate(state, p->u.qpsk.symbol_rate);
	} else if (state->dst_type == DST_TYPE_IS_TERR) {
		dst_set_bandwidth(state, p->u.ofdm.bandwidth);
	} else if (state->dst_type == DST_TYPE_IS_CABLE) {
		dst_set_fec(state, p->u.qam.fec_inner);
		dst_set_symbolrate(state, p->u.qam.symbol_rate);
	}
	dst_write_tuna(fe);

	return 0;
}

static int dst_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
{
	struct dst_state* state = (struct dst_state*) fe->demodulator_priv;

	p->frequency = state->decode_freq;
	p->inversion = state->inversion;
	if (state->dst_type == DST_TYPE_IS_SAT) {
		p->u.qpsk.symbol_rate = state->symbol_rate;
		p->u.qpsk.fec_inner = dst_get_fec(state);
	} else if (state->dst_type == DST_TYPE_IS_TERR) {
		p->u.ofdm.bandwidth = state->bandwidth;
	} else if (state->dst_type == DST_TYPE_IS_CABLE) {
		p->u.qam.symbol_rate = state->symbol_rate;
		p->u.qam.fec_inner = dst_get_fec(state);
		p->u.qam.modulation = QAM_AUTO;
	}

	return 0;
}

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

static struct dvb_frontend_ops dst_dvbt_ops;
static struct dvb_frontend_ops dst_dvbs_ops;
static struct dvb_frontend_ops dst_dvbc_ops;

struct dvb_frontend* dst_attach(const struct dst_config* config,
				struct i2c_adapter* i2c,
				struct bt878 *bt)
{
	struct dst_state* state = NULL;

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

	/* setup the state */
	state->config = config;
	state->i2c = i2c;
	state->bt = bt;

	/* check if the demod is there */
	if (dst_check_ci(state) < 0) goto error;

	/* determine settings based on type */
	switch (state->dst_type) {
	case DST_TYPE_IS_TERR:
		memcpy(&state->ops, &dst_dvbt_ops, sizeof(struct dvb_frontend_ops));
		break;
	case DST_TYPE_IS_CABLE:
		memcpy(&state->ops, &dst_dvbc_ops, sizeof(struct dvb_frontend_ops));
		break;
	case DST_TYPE_IS_SAT:
		memcpy(&state->ops, &dst_dvbs_ops, sizeof(struct dvb_frontend_ops));
		break;
	default:
		printk("dst: unknown frontend type. please report to the LinuxTV.org DVB mailinglist.\n");
		goto error;
	}

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

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

static struct dvb_frontend_ops dst_dvbt_ops = {

	.info = {
		.name = "DST DVB-T",
		.type = FE_OFDM,
		.frequency_min = 137000000,
		.frequency_max = 858000000,
		.frequency_stepsize = 166667,
		.caps = FE_CAN_FEC_AUTO | FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_GUARD_INTERVAL_AUTO
	},

	.release = dst_release,

	.init = dst_init,

	.set_frontend = dst_set_frontend,
	.get_frontend = dst_get_frontend,

	.read_status = dst_read_status,
	.read_signal_strength = dst_read_signal_strength,
	.read_snr = dst_read_snr,
};

static struct dvb_frontend_ops dst_dvbs_ops = {

	.info = {
		.name = "DST DVB-S",
		.type = FE_QPSK,
		.frequency_min = 950000,
		.frequency_max = 2150000,
		.frequency_stepsize = 1000,	/* kHz for QPSK frontends */
		.frequency_tolerance = 29500,
		.symbol_rate_min = 1000000,
		.symbol_rate_max = 45000000,
	/*     . symbol_rate_tolerance	= 	???,*/
		.caps = FE_CAN_FEC_AUTO | FE_CAN_QPSK
	},

	.release = dst_release,

	.init = dst_init,

	.set_frontend = dst_set_frontend,
	.get_frontend = dst_get_frontend,

	.read_status = dst_read_status,
	.read_signal_strength = dst_read_signal_strength,
	.read_snr = dst_read_snr,

	.diseqc_send_master_cmd = dst_set_diseqc,
	.set_voltage = dst_set_voltage,
	.set_tone = dst_set_tone,
};

static struct dvb_frontend_ops dst_dvbc_ops = {

	.info = {
		.name = "DST DVB-C",
		.type = FE_QAM,
		.frequency_stepsize = 62500,
		.frequency_min = 51000000,
		.frequency_max = 858000000,
		.symbol_rate_min = 1000000,
		.symbol_rate_max = 45000000,
	/*     . symbol_rate_tolerance	= 	???,*/
		.caps = FE_CAN_FEC_AUTO | FE_CAN_QAM_AUTO
	},

	.release = dst_release,

	.init = dst_init,

	.set_frontend = dst_set_frontend,
	.get_frontend = dst_get_frontend,

	.read_status = dst_read_status,
	.read_signal_strength = dst_read_signal_strength,
	.read_snr = dst_read_snr,
};

MODULE_DESCRIPTION("DST DVB-S/T/C Combo Frontend driver");
MODULE_AUTHOR("Jamie Honan");
MODULE_LICENSE("GPL");

EXPORT_SYMBOL(dst_attach);