saa7134-dvb.c

底层驱动开发

	tuner_frequency = params->frequency + 36130000;
	if (tuner_frequency < 87000000)
		return -EINVAL;
	/* low band */
	else if (tuner_frequency < 180000000) {
		band = 1;
		mode = 7;
		cp   = 0;
	} else if (tuner_frequency < 195000000) {
		band = 1;
		mode = 6;
		cp   = 1;
	/* mid band	*/
	} else if (tuner_frequency < 366000000) {
		if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ) {
			band = 10;
		} else {
			band = 2;
		}
		mode = 7;
		cp   = 0;
	} else if (tuner_frequency < 478000000) {
		if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ) {
			band = 10;
		} else {
			band = 2;
		}
		mode = 6;
		cp   = 1;
	/* high band */
	} else if (tuner_frequency < 662000000) {
		if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ) {
			band = 12;
		} else {
			band = 4;
		}
		mode = 7;
		cp   = 0;
	} else if (tuner_frequency < 840000000) {
		if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ) {
			band = 12;
		} else {
			band = 4;
		}
		mode = 6;
		cp   = 1;
	} else {
		if (params->u.ofdm.bandwidth == BANDWIDTH_8_MHZ) {
			band = 12;
		} else {
			band = 4;
		}
		mode = 7;
		cp   = 1;

	}
	/* calculate divisor */
	/* ((36166000 + Finput) / 166666) rounded! */
	divider = (tuner_frequency + 83333) / 166667;

	/* setup tuner buffer */
	tuner_buf[0] = (divider >> 8) & 0x7f;
	tuner_buf[1] = divider & 0xff;
	tuner_buf[2] = 0x80 | (cp << 6) | (mode  << 3) | 4;
	tuner_buf[3] = 0x40 | band;

	if (i2c_transfer(&dev->i2c_adap, &tuner_msg, 1) != 1)
		return -EIO;
	return 0;
}

#ifdef HAVE_TDA1004X
static struct tda1004x_config medion_cardbus = {
	.demod_address = 0x08,
	.invert        = 1,
	.invert_oclk   = 0,
	.xtal_freq     = TDA10046_XTAL_16M,
	.agc_config    = TDA10046_AGC_IFO_AUTO_NEG,
	.if_freq       = TDA10046_FREQ_3613,
	.pll_init      = philips_fmd1216_pll_init,
	.pll_set       = philips_fmd1216_pll_set,
	.pll_sleep	   = philips_fmd1216_analog,
	.request_firmware = NULL,
};
#endif

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

struct tda827x_data {
	u32 lomax;
	u8  spd;
	u8  bs;
	u8  bp;
	u8  cp;
	u8  gc3;
	u8 div1p5;
};

static struct tda827x_data tda827x_dvbt[] = {
	{ .lomax =  62000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
	{ .lomax =  66000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
	{ .lomax =  76000000, .spd = 3, .bs = 1, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
	{ .lomax =  84000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
	{ .lomax =  93000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax =  98000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 109000000, .spd = 3, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 123000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 133000000, .spd = 2, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 151000000, .spd = 2, .bs = 1, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 154000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 181000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 185000000, .spd = 2, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 217000000, .spd = 2, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 244000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 265000000, .spd = 1, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 302000000, .spd = 1, .bs = 1, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 324000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 370000000, .spd = 1, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 454000000, .spd = 1, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 493000000, .spd = 0, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 530000000, .spd = 0, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 554000000, .spd = 0, .bs = 1, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 604000000, .spd = 0, .bs = 1, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 696000000, .spd = 0, .bs = 2, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 740000000, .spd = 0, .bs = 2, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 820000000, .spd = 0, .bs = 3, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 865000000, .spd = 0, .bs = 3, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0},
	{ .lomax =         0, .spd = 0, .bs = 0, .bp = 0, .cp = 0, .gc3 = 0, .div1p5 = 0}
};

static int philips_tda827x_pll_init(struct dvb_frontend *fe)
{
	return 0;
}

static int philips_tda827x_pll_set(struct dvb_frontend *fe, struct dvb_frontend_parameters *params)
{
	struct saa7134_dev *dev = fe->dvb->priv;
	u8 tuner_buf[14];

	struct i2c_msg tuner_msg = {.addr = 0x60,.flags = 0,.buf = tuner_buf,
		                        .len = sizeof(tuner_buf) };
	int i, tuner_freq, if_freq;
	u32 N;
	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 (tda827x_dvbt[i].lomax < tuner_freq) {
		if(tda827x_dvbt[i + 1].lomax == 0)
			break;
		i++;
	}

	N = ((tuner_freq + 125000) / 250000) << (tda827x_dvbt[i].spd + 2);
	tuner_buf[0] = 0;
	tuner_buf[1] = (N>>8) | 0x40;
	tuner_buf[2] = N & 0xff;
	tuner_buf[3] = 0;
	tuner_buf[4] = 0x52;
	tuner_buf[5] = (tda827x_dvbt[i].spd << 6) + (tda827x_dvbt[i].div1p5 << 5) +
				   (tda827x_dvbt[i].bs << 3) + tda827x_dvbt[i].bp;
	tuner_buf[6] = (tda827x_dvbt[i].gc3 << 4) + 0x8f;
	tuner_buf[7] = 0xbf;
	tuner_buf[8] = 0x2a;
	tuner_buf[9] = 0x05;
	tuner_buf[10] = 0xff;
	tuner_buf[11] = 0x00;
	tuner_buf[12] = 0x00;
	tuner_buf[13] = 0x40;

	tuner_msg.len = 14;
	if (i2c_transfer(&dev->i2c_adap, &tuner_msg, 1) != 1)
		return -EIO;

	msleep(500);
	/* correct CP value */
	tuner_buf[0] = 0x30;
	tuner_buf[1] = 0x50 + tda827x_dvbt[i].cp;
	tuner_msg.len = 2;
	i2c_transfer(&dev->i2c_adap, &tuner_msg, 1);

	return 0;
}

static void philips_tda827x_pll_sleep(struct dvb_frontend *fe)
{
	struct saa7134_dev *dev = fe->dvb->priv;
	static u8 tda827x_sleep[] = { 0x30, 0xd0};
	struct i2c_msg tuner_msg = {.addr = 0x60,.flags = 0,.buf = tda827x_sleep,
	                            .len = sizeof(tda827x_sleep) };
	i2c_transfer(&dev->i2c_adap, &tuner_msg, 1);
}

static struct tda1004x_config tda827x_lifeview_config = {
	.demod_address = 0x08,
	.invert        = 1,
	.invert_oclk   = 0,
	.xtal_freq     = TDA10046_XTAL_16M,
	.agc_config    = TDA10046_AGC_TDA827X,
	.if_freq       = TDA10046_FREQ_045,
	.pll_init      = philips_tda827x_pll_init,
	.pll_set       = philips_tda827x_pll_set,
	.pll_sleep	   = philips_tda827x_pll_sleep,
	.request_firmware = NULL,
};
#endif

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

static int dvb_init(struct saa7134_dev *dev)
{
	/* init struct videobuf_dvb */
	dev->ts.nr_bufs    = 32;
	dev->ts.nr_packets = 32*4;
	dev->dvb.name = dev->name;
	videobuf_queue_init(&dev->dvb.dvbq, &saa7134_ts_qops,
			    dev->pci, &dev->slock,
			    V4L2_BUF_TYPE_VIDEO_CAPTURE,
			    V4L2_FIELD_ALTERNATE,
			    sizeof(struct saa7134_buf),
			    dev);

	switch (dev->board) {
#ifdef HAVE_MT352
	case SAA7134_BOARD_PINNACLE_300I_DVBT_PAL:
		printk("%s: pinnacle 300i dvb setup\n",dev->name);
		dev->dvb.frontend = mt352_attach(&pinnacle_300i,
						 &dev->i2c_adap);
		break;
#endif
#ifdef HAVE_TDA1004X
	case SAA7134_BOARD_MD7134:
		dev->dvb.frontend = tda10046_attach(&medion_cardbus,
						    &dev->i2c_adap);
		break;
	case SAA7134_BOARD_PHILIPS_TOUGH:
		dev->dvb.frontend = tda10046_attach(&philips_tu1216_config,
						    &dev->i2c_adap);
		break;
	case SAA7134_BOARD_FLYDVBTDUO:
		dev->dvb.frontend = tda10046_attach(&tda827x_lifeview_config,
						    &dev->i2c_adap);
		break;
	case SAA7134_BOARD_THYPHOON_DVBT_DUO_CARDBUS:
		dev->dvb.frontend = tda10046_attach(&tda827x_lifeview_config,
						    &dev->i2c_adap);
		break;
#endif
	default:
		printk("%s: Huh? unknown DVB card?\n",dev->name);
		break;
	}

	if (NULL == dev->dvb.frontend) {
		printk("%s: frontend initialization failed\n",dev->name);
		return -1;
	}

	/* register everything else */
	return videobuf_dvb_register(&dev->dvb, THIS_MODULE, dev);
}

static int dvb_fini(struct saa7134_dev *dev)
{
	static int on  = TDA9887_PRESENT | TDA9887_PORT2_INACTIVE;

	switch (dev->board) {
	case SAA7134_BOARD_PINNACLE_300I_DVBT_PAL:
		/* otherwise we don't detect the tuner on next insmod */
		saa7134_i2c_call_clients(dev,TDA9887_SET_CONFIG,&on);
		break;
	};
	videobuf_dvb_unregister(&dev->dvb);
	return 0;
}

static struct saa7134_mpeg_ops dvb_ops = {
	.type          = SAA7134_MPEG_DVB,
	.init          = dvb_init,
	.fini          = dvb_fini,
};

static int __init dvb_register(void)
{
	return saa7134_ts_register(&dvb_ops);
}

static void __exit dvb_unregister(void)
{
	saa7134_ts_unregister(&dvb_ops);
}

module_init(dvb_register);
module_exit(dvb_unregister);

/* ------------------------------------------------------------------ */
/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */