tda827x.c

来自「trident tm5600的linux驱动」· C语言 代码 · 共 856 行 · 第 1/2 页

	if (priv->cfg->config) {
		if (high)
			dprintk("setting LNA to high gain\n");
		else
			dprintk("setting LNA to low gain\n");
	}
	switch (priv->cfg->config) {
	case 0: /* no LNA */
		break;
	case 1: /* switch is GPIO 0 of tda8290 */
	case 2:
		if (params == NULL) {
			gp_func = 0;
			arg  = 0;
		} else {
			/* turn Vsync on */
			gp_func = 1;
			if (params->std & V4L2_STD_MN)
				arg = 1;
			else
				arg = 0;
		}
		if (fe->callback)
			fe->callback(priv->i2c_adap->algo_data,
				     DVB_FRONTEND_COMPONENT_TUNER,
				     gp_func, arg);
		buf[1] = high ? 0 : 1;
		if (priv->cfg->config == 2)
			buf[1] = high ? 1 : 0;
		i2c_transfer(priv->i2c_adap, &msg, 1);
		break;
	case 3: /* switch with GPIO of saa713x */
		if (fe->callback)
			fe->callback(priv->i2c_adap->algo_data,
				     DVB_FRONTEND_COMPONENT_TUNER, 0, high);
		break;
	}
}

static int tda827xa_set_params(struct dvb_frontend *fe,
			       struct dvb_frontend_parameters *params)
{
	struct tda827x_priv *priv = fe->tuner_priv;
	u8 buf[11];

	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
			       .buf = buf, .len = sizeof(buf) };

	int i, tuner_freq, if_freq;
	u32 N;

	dprintk("%s:\n", __func__);

	tda827xa_lna_gain(fe, 1, NULL);
	msleep(20);

	switch (params->u.ofdm.bandwidth) {
	case BANDWIDTH_6_MHZ:
		if_freq = 4000000;
		break;
	case BANDWIDTH_7_MHZ:
		if_freq = 4500000;
		break;
	default:		   /* 8 MHz or Auto */
		if_freq = 5000000;
		break;
	}
	tuner_freq = params->frequency + if_freq;

	i = 0;
	while (tda827xa_dvbt[i].lomax < tuner_freq) {
		if(tda827xa_dvbt[i + 1].lomax == 0)
			break;
		i++;
	}

	N = ((tuner_freq + 31250) / 62500) << tda827xa_dvbt[i].spd;
	buf[0] = 0;            // subaddress
	buf[1] = N >> 8;
	buf[2] = N & 0xff;
	buf[3] = 0;
	buf[4] = 0x16;
	buf[5] = (tda827xa_dvbt[i].spd << 5) + (tda827xa_dvbt[i].svco << 3) +
			tda827xa_dvbt[i].sbs;
	buf[6] = 0x4b + (tda827xa_dvbt[i].gc3 << 4);
	buf[7] = 0x1c;
	buf[8] = 0x06;
	buf[9] = 0x24;
	buf[10] = 0x00;
	msg.len = 11;
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
		printk("%s: could not write to tuner at addr: 0x%02x\n",
		       __func__, priv->i2c_addr << 1);
		return -EIO;
	}
	buf[0] = 0x90;
	buf[1] = 0xff;
	buf[2] = 0x60;
	buf[3] = 0x00;
	buf[4] = 0x59;  // lpsel, for 6MHz + 2
	msg.len = 5;
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	buf[0] = 0xa0;
	buf[1] = 0x40;
	msg.len = 2;
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	msleep(11);
	msg.flags = I2C_M_RD;
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);
	msg.flags = 0;

	buf[1] >>= 4;
	dprintk("tda8275a AGC2 gain is: %d\n", buf[1]);
	if ((buf[1]) < 2) {
		tda827xa_lna_gain(fe, 0, NULL);
		buf[0] = 0x60;
		buf[1] = 0x0c;
		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 1);
		i2c_transfer(priv->i2c_adap, &msg, 1);
	}

	buf[0] = 0xc0;
	buf[1] = 0x99;    // lpsel, for 6MHz + 2
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	buf[0] = 0x60;
	buf[1] = 0x3c;
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	/* correct CP value */
	buf[0] = 0x30;
	buf[1] = 0x10 + tda827xa_dvbt[i].scr;
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	msleep(163);
	buf[0] = 0xc0;
	buf[1] = 0x39;  // lpsel, for 6MHz + 2
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	msleep(3);
	/* freeze AGC1 */
	buf[0] = 0x50;
	buf[1] = 0x4f + (tda827xa_dvbt[i].gc3 << 4);
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	priv->frequency = tuner_freq - if_freq; // FIXME
	priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;

	return 0;
}


static int tda827xa_set_analog_params(struct dvb_frontend *fe,
				      struct analog_parameters *params)
{
	unsigned char tuner_reg[11];
	u32 N;
	int i;
	struct tda827x_priv *priv = fe->tuner_priv;
	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
			       .buf = tuner_reg, .len = sizeof(tuner_reg) };
	unsigned int freq = params->frequency;

	tda827x_set_std(fe, params);

	tda827xa_lna_gain(fe, 1, params);
	msleep(10);

	if (params->mode == V4L2_TUNER_RADIO)
		freq = freq / 1000;

	N = freq + priv->sgIF;

	i = 0;
	while (tda827xa_analog[i].lomax < N * 62500) {
		if (tda827xa_analog[i + 1].lomax == 0)
			break;
		i++;
	}

	N = N << tda827xa_analog[i].spd;

	tuner_reg[0] = 0;
	tuner_reg[1] = (unsigned char)(N>>8);
	tuner_reg[2] = (unsigned char) N;
	tuner_reg[3] = 0;
	tuner_reg[4] = 0x16;
	tuner_reg[5] = (tda827xa_analog[i].spd << 5) +
		       (tda827xa_analog[i].svco << 3) +
			tda827xa_analog[i].sbs;
	tuner_reg[6] = 0x8b + (tda827xa_analog[i].gc3 << 4);
	tuner_reg[7] = 0x1c;
	tuner_reg[8] = 4;
	tuner_reg[9] = 0x20;
	tuner_reg[10] = 0x00;
	msg.len = 11;
	i2c_transfer(priv->i2c_adap, &msg, 1);

	tuner_reg[0] = 0x90;
	tuner_reg[1] = 0xff;
	tuner_reg[2] = 0xe0;
	tuner_reg[3] = 0;
	tuner_reg[4] = 0x99 + (priv->lpsel << 1);
	msg.len = 5;
	i2c_transfer(priv->i2c_adap, &msg, 1);

	tuner_reg[0] = 0xa0;
	tuner_reg[1] = 0xc0;
	msg.len = 2;
	i2c_transfer(priv->i2c_adap, &msg, 1);

	tuner_reg[0] = 0x30;
	tuner_reg[1] = 0x10 + tda827xa_analog[i].scr;
	i2c_transfer(priv->i2c_adap, &msg, 1);

	msg.flags = I2C_M_RD;
	i2c_transfer(priv->i2c_adap, &msg, 1);
	msg.flags = 0;
	tuner_reg[1] >>= 4;
	dprintk("AGC2 gain is: %d\n", tuner_reg[1]);
	if (tuner_reg[1] < 1)
		tda827xa_lna_gain(fe, 0, params);

	msleep(100);
	tuner_reg[0] = 0x60;
	tuner_reg[1] = 0x3c;
	i2c_transfer(priv->i2c_adap, &msg, 1);

	msleep(163);
	tuner_reg[0] = 0x50;
	tuner_reg[1] = 0x8f + (tda827xa_analog[i].gc3 << 4);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	tuner_reg[0] = 0x80;
	tuner_reg[1] = 0x28;
	i2c_transfer(priv->i2c_adap, &msg, 1);

	tuner_reg[0] = 0xb0;
	tuner_reg[1] = 0x01;
	i2c_transfer(priv->i2c_adap, &msg, 1);

	tuner_reg[0] = 0xc0;
	tuner_reg[1] = 0x19 + (priv->lpsel << 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	priv->frequency = freq * 62500;

	return 0;
}

static void tda827xa_agcf(struct dvb_frontend *fe)
{
	struct tda827x_priv *priv = fe->tuner_priv;
	unsigned char data[] = {0x80, 0x2c};
	struct i2c_msg msg = {.addr = priv->i2c_addr, .flags = 0,
			      .buf = data, .len = 2};
	i2c_transfer(priv->i2c_adap, &msg, 1);
}

/* ------------------------------------------------------------------ */

static int tda827x_release(struct dvb_frontend *fe)
{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
	return 0;
}

static int tda827x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
	struct tda827x_priv *priv = fe->tuner_priv;
	*frequency = priv->frequency;
	return 0;
}

static int tda827x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
	struct tda827x_priv *priv = fe->tuner_priv;
	*bandwidth = priv->bandwidth;
	return 0;
}

static int tda827x_init(struct dvb_frontend *fe)
{
	struct tda827x_priv *priv = fe->tuner_priv;
	dprintk("%s:\n", __func__);
	if (priv->cfg && priv->cfg->init)
		priv->cfg->init(fe);

	return 0;
}

static int tda827x_probe_version(struct dvb_frontend *fe);

static int tda827x_initial_init(struct dvb_frontend *fe)
{
	int ret;
	ret = tda827x_probe_version(fe);
	if (ret)
		return ret;
	return fe->ops.tuner_ops.init(fe);
}

static int tda827x_initial_sleep(struct dvb_frontend *fe)
{
	int ret;
	ret = tda827x_probe_version(fe);
	if (ret)
		return ret;
	return fe->ops.tuner_ops.sleep(fe);
}

static struct dvb_tuner_ops tda827xo_tuner_ops = {
	.info = {
		.name = "Philips TDA827X",
		.frequency_min  =  55000000,
		.frequency_max  = 860000000,
		.frequency_step =    250000
	},
	.release = tda827x_release,
	.init = tda827x_initial_init,
	.sleep = tda827x_initial_sleep,
	.set_params = tda827xo_set_params,
	.set_analog_params = tda827xo_set_analog_params,
	.get_frequency = tda827x_get_frequency,
	.get_bandwidth = tda827x_get_bandwidth,
};

static struct dvb_tuner_ops tda827xa_tuner_ops = {
	.info = {
		.name = "Philips TDA827XA",
		.frequency_min  =  44000000,
		.frequency_max  = 906000000,
		.frequency_step =     62500
	},
	.release = tda827x_release,
	.init = tda827x_init,
	.sleep = tda827xa_sleep,
	.set_params = tda827xa_set_params,
	.set_analog_params = tda827xa_set_analog_params,
	.get_frequency = tda827x_get_frequency,
	.get_bandwidth = tda827x_get_bandwidth,
};

static int tda827x_probe_version(struct dvb_frontend *fe)
{	u8 data;
	struct tda827x_priv *priv = fe->tuner_priv;
	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = I2C_M_RD,
			       .buf = &data, .len = 1 };
	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
		printk("%s: could not read from tuner at addr: 0x%02x\n",
		       __func__, msg.addr << 1);
		return -EIO;
	}
	if ((data & 0x3c) == 0) {
		dprintk("tda827x tuner found\n");
		fe->ops.tuner_ops.init  = tda827x_init;
		fe->ops.tuner_ops.sleep = tda827xo_sleep;
		if (priv->cfg)
			priv->cfg->agcf = tda827xo_agcf;
	} else {
		dprintk("tda827xa tuner found\n");
		memcpy(&fe->ops.tuner_ops, &tda827xa_tuner_ops, sizeof(struct dvb_tuner_ops));
		if (priv->cfg)
			priv->cfg->agcf = tda827xa_agcf;
	}
	return 0;
}

struct dvb_frontend *tda827x_attach(struct dvb_frontend *fe, int addr,
				    struct i2c_adapter *i2c,
				    struct tda827x_config *cfg)
{
	struct tda827x_priv *priv = NULL;

	dprintk("%s:\n", __func__);
	priv = kzalloc(sizeof(struct tda827x_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;

	priv->i2c_addr = addr;
	priv->i2c_adap = i2c;
	priv->cfg = cfg;
	memcpy(&fe->ops.tuner_ops, &tda827xo_tuner_ops, sizeof(struct dvb_tuner_ops));
	fe->tuner_priv = priv;

	dprintk("type set to %s\n", fe->ops.tuner_ops.info.name);

	return fe;
}
EXPORT_SYMBOL_GPL(tda827x_attach);

MODULE_DESCRIPTION("DVB TDA827x driver");
MODULE_AUTHOR("Hartmut Hackmann <[e-mail]>");
MODULE_AUTHOR("Michael Krufky <[e-mail]>");
MODULE_LICENSE("GPL");

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-basic-offset: 8
 * End:
 */