tuner-simple.c

linux 内核源代码

		/* 0x00 -> NTSC antenna input 1 */
		/* 0x08 -> NTSC antenna input 2 */
		buffer[0] = 0x14;
		buffer[1] = 0x00;
		buffer[2] = 0x17;
		buffer[3] = 0x00;
		cb &= ~0x40;
		if (params->std & V4L2_STD_ATSC) {
			cb |= 0x40;
			buffer[1] = 0x04;
		}
		/* set to the correct mode (analog or digital) */
		tuneraddr = priv->i2c_props.addr;
		priv->i2c_props.addr = 0x0a;
		if (2 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,&buffer[0],2)))
			tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
		if (2 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,&buffer[2],2)))
			tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
		priv->i2c_props.addr = tuneraddr;
		/* FIXME: input */
		break;
	}

	if (t_params->cb_first_if_lower_freq && div < priv->last_div) {
		buffer[0] = config;
		buffer[1] = cb;
		buffer[2] = (div>>8) & 0x7f;
		buffer[3] = div      & 0xff;
	} else {
		buffer[0] = (div>>8) & 0x7f;
		buffer[1] = div      & 0xff;
		buffer[2] = config;
		buffer[3] = cb;
	}
	priv->last_div = div;
	if (t_params->has_tda9887) {
		int config = 0;
		int is_secam_l = (params->std & (V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC)) &&
			!(params->std & ~(V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC));

		if (params->std == V4L2_STD_SECAM_LC) {
			if (t_params->port1_active ^ t_params->port1_invert_for_secam_lc)
				config |= TDA9887_PORT1_ACTIVE;
			if (t_params->port2_active ^ t_params->port2_invert_for_secam_lc)
				config |= TDA9887_PORT2_ACTIVE;
		}
		else {
			if (t_params->port1_active)
				config |= TDA9887_PORT1_ACTIVE;
			if (t_params->port2_active)
				config |= TDA9887_PORT2_ACTIVE;
		}
		if (t_params->intercarrier_mode)
			config |= TDA9887_INTERCARRIER;
		if (is_secam_l) {
			if (i == 0 && t_params->default_top_secam_low)
				config |= TDA9887_TOP(t_params->default_top_secam_low);
			else if (i == 1 && t_params->default_top_secam_mid)
				config |= TDA9887_TOP(t_params->default_top_secam_mid);
			else if (t_params->default_top_secam_high)
				config |= TDA9887_TOP(t_params->default_top_secam_high);
		}
		else {
			if (i == 0 && t_params->default_top_low)
				config |= TDA9887_TOP(t_params->default_top_low);
			else if (i == 1 && t_params->default_top_mid)
				config |= TDA9887_TOP(t_params->default_top_mid);
			else if (t_params->default_top_high)
				config |= TDA9887_TOP(t_params->default_top_high);
		}
		if (t_params->default_pll_gating_18)
			config |= TDA9887_GATING_18;
		i2c_clients_command(priv->i2c_props.adap, TDA9887_SET_CONFIG, &config);
	}
	tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
		  buffer[0],buffer[1],buffer[2],buffer[3]);

	if (4 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,4)))
		tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);

	switch (priv->type) {
	case TUNER_LG_TDVS_H06XF:
		/* Set the Auxiliary Byte. */
		buffer[0] = buffer[2];
		buffer[0] &= ~0x20;
		buffer[0] |= 0x18;
		buffer[1] = 0x20;
		tuner_dbg("tv 0x%02x 0x%02x\n",buffer[0],buffer[1]);

		if (2 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,2)))
			tuner_warn("i2c i/o error: rc == %d (should be 2)\n",rc);
		break;
	case TUNER_MICROTUNE_4042FI5:
	{
		// FIXME - this may also work for other tuners
		unsigned long timeout = jiffies + msecs_to_jiffies(1);
		u8 status_byte = 0;

		/* Wait until the PLL locks */
		for (;;) {
			if (time_after(jiffies,timeout))
				return 0;
			if (1 != (rc = tuner_i2c_xfer_recv(&priv->i2c_props,&status_byte,1))) {
				tuner_warn("i2c i/o read error: rc == %d (should be 1)\n",rc);
				break;
			}
			if (status_byte & TUNER_PLL_LOCKED)
				break;
			udelay(10);
		}

		/* Set the charge pump for optimized phase noise figure */
		config &= ~TUNER_CHARGE_PUMP;
		buffer[0] = (div>>8) & 0x7f;
		buffer[1] = div      & 0xff;
		buffer[2] = config;
		buffer[3] = cb;
		tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
			  buffer[0],buffer[1],buffer[2],buffer[3]);

		if (4 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,4)))
			tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);
		break;
	}
	}
	return 0;
}

static int simple_set_radio_freq(struct dvb_frontend *fe,
				 struct analog_parameters *params)
{
	struct tunertype *tun;
	struct tuner_simple_priv *priv = fe->tuner_priv;
	u8 buffer[4];
	u16 div;
	int rc, j;
	struct tuner_params *t_params;
	unsigned int freq = params->frequency;

	tun = priv->tun;

	for (j = tun->count-1; j > 0; j--)
		if (tun->params[j].type == TUNER_PARAM_TYPE_RADIO)
			break;
	/* default t_params (j=0) will be used if desired type wasn't found */
	t_params = &tun->params[j];

	/* Select Radio 1st IF used */
	switch (t_params->radio_if) {
	case 0: /* 10.7 MHz */
		freq += (unsigned int)(10.7*16000);
		break;
	case 1: /* 33.3 MHz */
		freq += (unsigned int)(33.3*16000);
		break;
	case 2: /* 41.3 MHz */
		freq += (unsigned int)(41.3*16000);
		break;
	default:
		tuner_warn("Unsupported radio_if value %d\n", t_params->radio_if);
		return 0;
	}

	/* Bandswitch byte */
	switch (priv->type) {
	case TUNER_TENA_9533_DI:
	case TUNER_YMEC_TVF_5533MF:
		tuner_dbg("This tuner doesn't have FM. Most cards have a TEA5767 for FM\n");
		return 0;
	case TUNER_PHILIPS_FM1216ME_MK3:
	case TUNER_PHILIPS_FM1236_MK3:
	case TUNER_PHILIPS_FMD1216ME_MK3:
	case TUNER_LG_NTSC_TAPE:
	case TUNER_PHILIPS_FM1256_IH3:
		buffer[3] = 0x19;
		break;
	case TUNER_TNF_5335MF:
		buffer[3] = 0x11;
		break;
	case TUNER_LG_PAL_FM:
		buffer[3] = 0xa5;
		break;
	case TUNER_THOMSON_DTT761X:
		buffer[3] = 0x39;
		break;
	case TUNER_MICROTUNE_4049FM5:
	default:
		buffer[3] = 0xa4;
		break;
	}

	buffer[2] = (t_params->ranges[0].config & ~TUNER_RATIO_MASK) |
		    TUNER_RATIO_SELECT_50; /* 50 kHz step */

	/* Convert from 1/16 kHz V4L steps to 1/20 MHz (=50 kHz) PLL steps
	   freq * (1 Mhz / 16000 V4L steps) * (20 PLL steps / 1 MHz) =
	   freq * (1/800) */
	div = (freq + 400) / 800;

	if (t_params->cb_first_if_lower_freq && div < priv->last_div) {
		buffer[0] = buffer[2];
		buffer[1] = buffer[3];
		buffer[2] = (div>>8) & 0x7f;
		buffer[3] = div      & 0xff;
	} else {
		buffer[0] = (div>>8) & 0x7f;
		buffer[1] = div      & 0xff;
	}

	tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
	       buffer[0],buffer[1],buffer[2],buffer[3]);
	priv->last_div = div;

	if (t_params->has_tda9887) {
		int config = 0;
		if (t_params->port1_active && !t_params->port1_fm_high_sensitivity)
			config |= TDA9887_PORT1_ACTIVE;
		if (t_params->port2_active && !t_params->port2_fm_high_sensitivity)
			config |= TDA9887_PORT2_ACTIVE;
		if (t_params->intercarrier_mode)
			config |= TDA9887_INTERCARRIER;
/*		if (t_params->port1_set_for_fm_mono)
			config &= ~TDA9887_PORT1_ACTIVE;*/
		if (t_params->fm_gain_normal)
			config |= TDA9887_GAIN_NORMAL;
		if (t_params->radio_if == 2)
			config |= TDA9887_RIF_41_3;
		i2c_clients_command(priv->i2c_props.adap, TDA9887_SET_CONFIG, &config);
	}
	if (4 != (rc = tuner_i2c_xfer_send(&priv->i2c_props,buffer,4)))
		tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc);

	return 0;
}

static int simple_set_params(struct dvb_frontend *fe,
			     struct analog_parameters *params)
{
	struct tuner_simple_priv *priv = fe->tuner_priv;
	int ret = -EINVAL;

	switch (params->mode) {
	case V4L2_TUNER_RADIO:
		ret = simple_set_radio_freq(fe, params);
		priv->frequency = params->frequency * 125 / 2;
		break;
	case V4L2_TUNER_ANALOG_TV:
	case V4L2_TUNER_DIGITAL_TV:
		ret = simple_set_tv_freq(fe, params);
		priv->frequency = params->frequency * 62500;
		break;
	}

	return ret;
}


static int simple_release(struct dvb_frontend *fe)
{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;

	return 0;
}

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

static struct dvb_tuner_ops simple_tuner_ops = {
	.set_analog_params = simple_set_params,
	.release           = simple_release,
	.get_frequency     = simple_get_frequency,
	.get_status        = simple_get_status,
	.get_rf_strength   = simple_get_rf_strength,
};

struct dvb_frontend *simple_tuner_attach(struct dvb_frontend *fe,
					 struct i2c_adapter *i2c_adap,
					 u8 i2c_addr,
					 struct simple_tuner_config *cfg)
{
	struct tuner_simple_priv *priv = NULL;

	priv = kzalloc(sizeof(struct tuner_simple_priv), GFP_KERNEL);
	if (priv == NULL)
		return NULL;
	fe->tuner_priv = priv;

	priv->i2c_props.addr = i2c_addr;
	priv->i2c_props.adap = i2c_adap;
	priv->type = cfg->type;
	priv->tun  = cfg->tun;

	memcpy(&fe->ops.tuner_ops, &simple_tuner_ops, sizeof(struct dvb_tuner_ops));

	tuner_info("type set to %d (%s)\n", cfg->type, cfg->tun->name);

	strlcpy(fe->ops.tuner_ops.info.name, cfg->tun->name, sizeof(fe->ops.tuner_ops.info.name));

	return fe;
}


EXPORT_SYMBOL_GPL(simple_tuner_attach);

MODULE_DESCRIPTION("Simple 4-control-bytes style tuner driver");
MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
MODULE_LICENSE("GPL");

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