stv0299.c

来自「trident tm5600的linux驱动」· C语言 代码 · 共 755 行 · 第 1/2 页

	case SEC_VOLTAGE_18:
		reg0x0c |= 0x50; /* OP1 on, OP0 on */
		break;
	case SEC_VOLTAGE_OFF:
		/* LNB power off! */
		reg0x08 = 0x00;
		reg0x0c = 0x00;
		break;
	default:
		return -EINVAL;
	};

	if (state->config->op0_off)
		reg0x0c &= ~0x10;

	stv0299_writeregI(state, 0x08, reg0x08);
	return stv0299_writeregI(state, 0x0c, reg0x0c);
}

static int stv0299_send_legacy_dish_cmd (struct dvb_frontend* fe, unsigned long cmd)
{
	struct stv0299_state* state = fe->demodulator_priv;
	u8 reg0x08;
	u8 reg0x0c;
	u8 lv_mask = 0x40;
	u8 last = 1;
	int i;
	struct timeval nexttime;
	struct timeval tv[10];

	reg0x08 = stv0299_readreg (state, 0x08);
	reg0x0c = stv0299_readreg (state, 0x0c);
	reg0x0c &= 0x0f;
	stv0299_writeregI (state, 0x08, (reg0x08 & 0x3f) | (state->config->lock_output << 6));
	if (state->config->volt13_op0_op1 == STV0299_VOLT13_OP0)
		lv_mask = 0x10;

	cmd = cmd << 1;
	if (debug_legacy_dish_switch)
		printk ("%s switch command: 0x%04lx\n",__func__, cmd);

	do_gettimeofday (&nexttime);
	if (debug_legacy_dish_switch)
		memcpy (&tv[0], &nexttime, sizeof (struct timeval));
	stv0299_writeregI (state, 0x0c, reg0x0c | 0x50); /* set LNB to 18V */

	dvb_frontend_sleep_until(&nexttime, 32000);

	for (i=0; i<9; i++) {
		if (debug_legacy_dish_switch)
			do_gettimeofday (&tv[i+1]);
		if((cmd & 0x01) != last) {
			/* set voltage to (last ? 13V : 18V) */
			stv0299_writeregI (state, 0x0c, reg0x0c | (last ? lv_mask : 0x50));
			last = (last) ? 0 : 1;
		}

		cmd = cmd >> 1;

		if (i != 8)
			dvb_frontend_sleep_until(&nexttime, 8000);
	}
	if (debug_legacy_dish_switch) {
		printk ("%s(%d): switch delay (should be 32k followed by all 8k\n",
			__func__, fe->dvb->num);
		for (i = 1; i < 10; i++)
			printk ("%d: %d\n", i, timeval_usec_diff(tv[i-1] , tv[i]));
	}

	return 0;
}

static int stv0299_init (struct dvb_frontend* fe)
{
	struct stv0299_state* state = fe->demodulator_priv;
	int i;
	u8 reg;
	u8 val;

	dprintk("stv0299: init chip\n");

	for (i = 0; ; i += 2)  {
		reg = state->config->inittab[i];
		val = state->config->inittab[i+1];
		if (reg == 0xff && val == 0xff)
			break;
		if (reg == 0x0c && state->config->op0_off)
			val &= ~0x10;
		stv0299_writeregI(state, reg, val);
	}

	return 0;
}

static int stv0299_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
	struct stv0299_state* state = fe->demodulator_priv;

	u8 signal = 0xff - stv0299_readreg (state, 0x18);
	u8 sync = stv0299_readreg (state, 0x1b);

	dprintk ("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);
	*status = 0;

	if (signal > 10)
		*status |= FE_HAS_SIGNAL;

	if (sync & 0x80)
		*status |= FE_HAS_CARRIER;

	if (sync & 0x10)
		*status |= FE_HAS_VITERBI;

	if (sync & 0x08)
		*status |= FE_HAS_SYNC;

	if ((sync & 0x98) == 0x98)
		*status |= FE_HAS_LOCK;

	return 0;
}

static int stv0299_read_ber(struct dvb_frontend* fe, u32* ber)
{
	struct stv0299_state* state = fe->demodulator_priv;

	if (state->errmode != STATUS_BER)
		return -ENOSYS;

	*ber = stv0299_readreg(state, 0x1e) | (stv0299_readreg(state, 0x1d) << 8);

	return 0;
}

static int stv0299_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
	struct stv0299_state* state = fe->demodulator_priv;

	s32 signal =  0xffff - ((stv0299_readreg (state, 0x18) << 8)
			       | stv0299_readreg (state, 0x19));

	dprintk ("%s : FE_READ_SIGNAL_STRENGTH : AGC2I: 0x%02x%02x, signal=0x%04x\n", __func__,
		 stv0299_readreg (state, 0x18),
		 stv0299_readreg (state, 0x19), (int) signal);

	signal = signal * 5 / 4;
	*strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;

	return 0;
}

static int stv0299_read_snr(struct dvb_frontend* fe, u16* snr)
{
	struct stv0299_state* state = fe->demodulator_priv;

	s32 xsnr = 0xffff - ((stv0299_readreg (state, 0x24) << 8)
			   | stv0299_readreg (state, 0x25));
	xsnr = 3 * (xsnr - 0xa100);
	*snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;

	return 0;
}

static int stv0299_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
	struct stv0299_state* state = fe->demodulator_priv;

	if (state->errmode != STATUS_UCBLOCKS)
		return -ENOSYS;

	state->ucblocks += stv0299_readreg(state, 0x1e);
	state->ucblocks += (stv0299_readreg(state, 0x1d) << 8);
	*ucblocks = state->ucblocks;

	return 0;
}

static int stv0299_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters * p)
{
	struct stv0299_state* state = fe->demodulator_priv;
	int invval = 0;

	dprintk ("%s : FE_SET_FRONTEND\n", __func__);
	if (state->config->set_ts_params)
		state->config->set_ts_params(fe, 0);

	// set the inversion
	if (p->inversion == INVERSION_OFF) invval = 0;
	else if (p->inversion == INVERSION_ON) invval = 1;
	else {
		printk("stv0299 does not support auto-inversion\n");
		return -EINVAL;
	}
	if (state->config->invert) invval = (~invval) & 1;
	stv0299_writeregI(state, 0x0c, (stv0299_readreg(state, 0x0c) & 0xfe) | invval);

	if (fe->ops.tuner_ops.set_params) {
		fe->ops.tuner_ops.set_params(fe, p);
		if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
	}

	stv0299_set_FEC (state, p->u.qpsk.fec_inner);
	stv0299_set_symbolrate (fe, p->u.qpsk.symbol_rate);
	stv0299_writeregI(state, 0x22, 0x00);
	stv0299_writeregI(state, 0x23, 0x00);

	state->tuner_frequency = p->frequency;
	state->fec_inner = p->u.qpsk.fec_inner;
	state->symbol_rate = p->u.qpsk.symbol_rate;

	return 0;
}

static int stv0299_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters * p)
{
	struct stv0299_state* state = fe->demodulator_priv;
	s32 derot_freq;
	int invval;

	derot_freq = (s32)(s16) ((stv0299_readreg (state, 0x22) << 8)
				| stv0299_readreg (state, 0x23));

	derot_freq *= (state->config->mclk >> 16);
	derot_freq += 500;
	derot_freq /= 1000;

	p->frequency += derot_freq;

	invval = stv0299_readreg (state, 0x0c) & 1;
	if (state->config->invert) invval = (~invval) & 1;
	p->inversion = invval ? INVERSION_ON : INVERSION_OFF;

	p->u.qpsk.fec_inner = stv0299_get_fec (state);
	p->u.qpsk.symbol_rate = stv0299_get_symbolrate (state);

	return 0;
}

static int stv0299_sleep(struct dvb_frontend* fe)
{
	struct stv0299_state* state = fe->demodulator_priv;

	stv0299_writeregI(state, 0x02, 0x80);
	state->initialised = 0;

	return 0;
}

static int stv0299_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
{
	struct stv0299_state* state = fe->demodulator_priv;

	if (enable) {
		stv0299_writeregI(state, 0x05, 0xb5);
	} else {
		stv0299_writeregI(state, 0x05, 0x35);
	}
	udelay(1);
	return 0;
}

static int stv0299_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
{
	struct stv0299_state* state = fe->demodulator_priv;

	fesettings->min_delay_ms = state->config->min_delay_ms;
	if (fesettings->parameters.u.qpsk.symbol_rate < 10000000) {
		fesettings->step_size = fesettings->parameters.u.qpsk.symbol_rate / 32000;
		fesettings->max_drift = 5000;
	} else {
		fesettings->step_size = fesettings->parameters.u.qpsk.symbol_rate / 16000;
		fesettings->max_drift = fesettings->parameters.u.qpsk.symbol_rate / 2000;
	}
	return 0;
}

static void stv0299_release(struct dvb_frontend* fe)
{
	struct stv0299_state* state = fe->demodulator_priv;
	kfree(state);
}

static struct dvb_frontend_ops stv0299_ops;

struct dvb_frontend* stv0299_attach(const struct stv0299_config* config,
				    struct i2c_adapter* i2c)
{
	struct stv0299_state* state = NULL;
	int id;

	/* allocate memory for the internal state */
	state = kmalloc(sizeof(struct stv0299_state), GFP_KERNEL);
	if (state == NULL) goto error;

	/* setup the state */
	state->config = config;
	state->i2c = i2c;
	state->initialised = 0;
	state->tuner_frequency = 0;
	state->symbol_rate = 0;
	state->fec_inner = 0;
	state->errmode = STATUS_BER;

	/* check if the demod is there */
	stv0299_writeregI(state, 0x02, 0x34); /* standby off */
	msleep(200);
	id = stv0299_readreg(state, 0x00);

	/* register 0x00 contains 0xa1 for STV0299 and STV0299B */
	/* register 0x00 might contain 0x80 when returning from standby */
	if (id != 0xa1 && id != 0x80) goto error;

	/* create dvb_frontend */
	memcpy(&state->frontend.ops, &stv0299_ops, sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;
	return &state->frontend;

error:
	kfree(state);
	return NULL;
}

static struct dvb_frontend_ops stv0299_ops = {

	.info = {
		.name			= "ST STV0299 DVB-S",
		.type			= FE_QPSK,
		.frequency_min		= 950000,
		.frequency_max		= 2150000,
		.frequency_stepsize	= 125,	 /* kHz for QPSK frontends */
		.frequency_tolerance	= 0,
		.symbol_rate_min	= 1000000,
		.symbol_rate_max	= 45000000,
		.symbol_rate_tolerance	= 500,	/* ppm */
		.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_QPSK |
		      FE_CAN_FEC_AUTO
	},

	.release = stv0299_release,

	.init = stv0299_init,
	.sleep = stv0299_sleep,
	.write = stv0299_write,
	.i2c_gate_ctrl = stv0299_i2c_gate_ctrl,

	.set_frontend = stv0299_set_frontend,
	.get_frontend = stv0299_get_frontend,
	.get_tune_settings = stv0299_get_tune_settings,

	.read_status = stv0299_read_status,
	.read_ber = stv0299_read_ber,
	.read_signal_strength = stv0299_read_signal_strength,
	.read_snr = stv0299_read_snr,
	.read_ucblocks = stv0299_read_ucblocks,

	.diseqc_send_master_cmd = stv0299_send_diseqc_msg,
	.diseqc_send_burst = stv0299_send_diseqc_burst,
	.set_tone = stv0299_set_tone,
	.set_voltage = stv0299_set_voltage,
	.dishnetwork_send_legacy_command = stv0299_send_legacy_dish_cmd,
};

module_param(debug_legacy_dish_switch, int, 0444);
MODULE_PARM_DESC(debug_legacy_dish_switch, "Enable timing analysis for Dish Network legacy switches");

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

MODULE_DESCRIPTION("ST STV0299 DVB Demodulator driver");
MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Peter Schildmann, Felix Domke, "
	      "Andreas Oberritter, Andrew de Quincey, Kenneth Aafly");
MODULE_LICENSE("GPL");

EXPORT_SYMBOL(stv0299_attach);