dvb-bt8xx.c

底层驱动开发

	buf[0] = (div >> 8) & 0x7F;
	buf[1] = div & 0xFF;
	buf[2] = 0x85;
	if ((params->frequency >= 47000000) && (params->frequency < 153000000))
		buf[3] = 0x01;
	else if ((params->frequency >= 153000000) && (params->frequency < 430000000))
		buf[3] = 0x02;
	else if ((params->frequency >= 430000000) && (params->frequency < 824000000))
		buf[3] = 0x0C;
	else if ((params->frequency >= 824000000) && (params->frequency < 863000000))
		buf[3] = 0x8C;
	else
		return -EINVAL;

	i2c_transfer(card->i2c_adapter, &msg, 1);
	return 0;
}

static struct nxt6000_config vp3021_alps_tded4_config = {
	.demod_address = 0x0a,
	.clock_inversion = 1,
	.pll_set = vp3021_alps_tded4_pll_set,
};

static int digitv_alps_tded4_demod_init(struct dvb_frontend* fe)
{
	static u8 mt352_clock_config [] = { 0x89, 0x38, 0x2d };
	static u8 mt352_reset [] = { 0x50, 0x80 };
	static u8 mt352_adc_ctl_1_cfg [] = { 0x8E, 0x40 };
	static u8 mt352_agc_cfg [] = { 0x67, 0x20, 0xa0 };
	static u8 mt352_capt_range_cfg[] = { 0x75, 0x32 };

	mt352_write(fe, mt352_clock_config, sizeof(mt352_clock_config));
	udelay(2000);
	mt352_write(fe, mt352_reset, sizeof(mt352_reset));
	mt352_write(fe, mt352_adc_ctl_1_cfg, sizeof(mt352_adc_ctl_1_cfg));
	mt352_write(fe, mt352_agc_cfg,sizeof(mt352_agc_cfg));
	mt352_write(fe, mt352_capt_range_cfg, sizeof(mt352_capt_range_cfg));

	return 0;
}

static int digitv_alps_tded4_pll_set(struct dvb_frontend* fe, struct dvb_frontend_parameters* params, u8* pllbuf)
{
	u32 div;
	struct dvb_ofdm_parameters *op = &params->u.ofdm;

	div = (((params->frequency + 83333) * 3) / 500000) + IF_FREQUENCYx6;

	pllbuf[0] = 0xc2;
	pllbuf[1] = (div >> 8) & 0x7F;
	pllbuf[2] = div & 0xFF;
	pllbuf[3] = 0x85;

	dprintk("frequency %u, div %u\n", params->frequency, div);

	if (params->frequency < 470000000)
		pllbuf[4] = 0x02;
	else if (params->frequency > 823000000)
		pllbuf[4] = 0x88;
	else
		pllbuf[4] = 0x08;

	if (op->bandwidth == 8)
		pllbuf[4] |= 0x04;

	return 0;
}

static void digitv_alps_tded4_reset(struct dvb_bt8xx_card *bt)
{
	/*
	 * Reset the frontend, must be called before trying
	 * to initialise the MT352 or mt352_attach
	 * will fail.
	 *
	 * Presumably not required for the NXT6000 frontend.
	 *
	 */

	int ret = bttv_gpio_enable(bt->bttv_nr, 0x08, 0x08);
	if (ret != 0)
		printk(KERN_WARNING "digitv_alps_tded4: Init Error - Can't Reset DVR (%i)\n", ret);

	/* Pulse the reset line */
	bttv_write_gpio(bt->bttv_nr, 0x08, 0x08); /* High */
	bttv_write_gpio(bt->bttv_nr, 0x08, 0x00); /* Low  */
	msleep(100);

	bttv_write_gpio(bt->bttv_nr, 0x08, 0x08); /* High */
}

static struct mt352_config digitv_alps_tded4_config = {
	.demod_address = 0x0a,
	.demod_init = digitv_alps_tded4_demod_init,
	.pll_set = digitv_alps_tded4_pll_set,
};

static void frontend_init(struct dvb_bt8xx_card *card, u32 type)
{
	int ret;
	struct dst_state* state = NULL;

	switch(type) {
#ifdef BTTV_DVICO_DVBT_LITE
	case BTTV_DVICO_DVBT_LITE:
		card->fe = mt352_attach(&thomson_dtt7579_config, card->i2c_adapter);
		if (card->fe != NULL) {
			card->fe->ops->info.frequency_min = 174000000;
			card->fe->ops->info.frequency_max = 862000000;
		}
		break;
#endif

#ifdef BTTV_TWINHAN_VP3021
	case BTTV_TWINHAN_VP3021:
#else
	case BTTV_NEBULA_DIGITV:
#endif
		/*
		 * It is possible to determine the correct frontend using the I2C bus (see the Nebula SDK);
		 * this would be a cleaner solution than trying each frontend in turn.
		 */

		/* Old Nebula (marked (c)2003 on high profile pci card) has nxt6000 demod */
		card->fe = nxt6000_attach(&vp3021_alps_tded4_config, card->i2c_adapter);
		if (card->fe != NULL) {
			dprintk ("dvb_bt8xx: an nxt6000 was detected on your digitv card\n");
			break;
		}

		/* New Nebula (marked (c)2005 on low profile pci card) has mt352 demod */
		digitv_alps_tded4_reset(card);
		card->fe = mt352_attach(&digitv_alps_tded4_config, card->i2c_adapter);

		if (card->fe != NULL)
			dprintk ("dvb_bt8xx: an mt352 was detected on your digitv card\n");
		break;

	case BTTV_AVDVBT_761:
		card->fe = sp887x_attach(&microtune_mt7202dtf_config, card->i2c_adapter);
		break;

	case BTTV_AVDVBT_771:
		card->fe = mt352_attach(&advbt771_samsung_tdtc9251dh0_config, card->i2c_adapter);
		if (card->fe != NULL) {
			card->fe->ops->info.frequency_min = 174000000;
			card->fe->ops->info.frequency_max = 862000000;
		}
		break;

	case BTTV_TWINHAN_DST:
		/*	DST is not a frontend driver !!!		*/
		state = (struct dst_state *) kmalloc(sizeof (struct dst_state), GFP_KERNEL);
		/*	Setup the Card					*/
		state->config = &dst_config;
		state->i2c = card->i2c_adapter;
		state->bt = card->bt;

		/*	DST is not a frontend, attaching the ASIC	*/
		if ((dst_attach(state, &card->dvb_adapter)) == NULL) {
			printk("%s: Could not find a Twinhan DST.\n", __FUNCTION__);
			break;
		}
		card->fe = &state->frontend;

		/*	Attach other DST peripherals if any		*/
		/*	Conditional Access device			*/
		if (state->dst_hw_cap & DST_TYPE_HAS_CA)
			ret = dst_ca_attach(state, &card->dvb_adapter);
		break;

	case BTTV_PINNACLESAT:
		card->fe = cx24110_attach(&pctvsat_config, card->i2c_adapter);
		break;

	case BTTV_PC_HDTV:
		card->fe = or51211_attach(&or51211_config, card->i2c_adapter);
		break;
	}

	if (card->fe == NULL)
		printk("dvb-bt8xx: A frontend driver was not found for device %04x/%04x subsystem %04x/%04x\n",
		       card->bt->dev->vendor,
		       card->bt->dev->device,
		       card->bt->dev->subsystem_vendor,
		       card->bt->dev->subsystem_device);
	else
		if (dvb_register_frontend(&card->dvb_adapter, card->fe)) {
			printk("dvb-bt8xx: Frontend registration failed!\n");
			if (card->fe->ops->release)
				card->fe->ops->release(card->fe);
			card->fe = NULL;
		}
}

static int __init dvb_bt8xx_load_card(struct dvb_bt8xx_card *card, u32 type)
{
	int result;

	if ((result = dvb_register_adapter(&card->dvb_adapter, card->card_name, THIS_MODULE)) < 0) {
		printk("dvb_bt8xx: dvb_register_adapter failed (errno = %d)\n", result);
		return result;
	}
	card->dvb_adapter.priv = card;

	card->bt->adapter = card->i2c_adapter;

	memset(&card->demux, 0, sizeof(struct dvb_demux));

	card->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING | DMX_MEMORY_BASED_FILTERING;

	card->demux.priv = card;
	card->demux.filternum = 256;
	card->demux.feednum = 256;
	card->demux.start_feed = dvb_bt8xx_start_feed;
	card->demux.stop_feed = dvb_bt8xx_stop_feed;
	card->demux.write_to_decoder = NULL;

	if ((result = dvb_dmx_init(&card->demux)) < 0) {
		printk("dvb_bt8xx: dvb_dmx_init failed (errno = %d)\n", result);

		dvb_unregister_adapter(&card->dvb_adapter);
		return result;
	}

	card->dmxdev.filternum = 256;
	card->dmxdev.demux = &card->demux.dmx;
	card->dmxdev.capabilities = 0;

	if ((result = dvb_dmxdev_init(&card->dmxdev, &card->dvb_adapter)) < 0) {
		printk("dvb_bt8xx: dvb_dmxdev_init failed (errno = %d)\n", result);

		dvb_dmx_release(&card->demux);
		dvb_unregister_adapter(&card->dvb_adapter);
		return result;
	}

	card->fe_hw.source = DMX_FRONTEND_0;

	if ((result = card->demux.dmx.add_frontend(&card->demux.dmx, &card->fe_hw)) < 0) {
		printk("dvb_bt8xx: dvb_dmx_init failed (errno = %d)\n", result);

		dvb_dmxdev_release(&card->dmxdev);
		dvb_dmx_release(&card->demux);
		dvb_unregister_adapter(&card->dvb_adapter);
		return result;
	}

	card->fe_mem.source = DMX_MEMORY_FE;

	if ((result = card->demux.dmx.add_frontend(&card->demux.dmx, &card->fe_mem)) < 0) {
		printk("dvb_bt8xx: dvb_dmx_init failed (errno = %d)\n", result);

		card->demux.dmx.remove_frontend(&card->demux.dmx, &card->fe_hw);
		dvb_dmxdev_release(&card->dmxdev);
		dvb_dmx_release(&card->demux);
		dvb_unregister_adapter(&card->dvb_adapter);
		return result;
	}

	if ((result = card->demux.dmx.connect_frontend(&card->demux.dmx, &card->fe_hw)) < 0) {
		printk("dvb_bt8xx: dvb_dmx_init failed (errno = %d)\n", result);

		card->demux.dmx.remove_frontend(&card->demux.dmx, &card->fe_mem);
		card->demux.dmx.remove_frontend(&card->demux.dmx, &card->fe_hw);
		dvb_dmxdev_release(&card->dmxdev);
		dvb_dmx_release(&card->demux);
		dvb_unregister_adapter(&card->dvb_adapter);
		return result;
	}

	dvb_net_init(&card->dvb_adapter, &card->dvbnet, &card->demux.dmx);

	tasklet_init(&card->bt->tasklet, dvb_bt8xx_task, (unsigned long) card);

	frontend_init(card, type);

	return 0;
}

static int dvb_bt8xx_probe(struct device *dev)
{
	struct bttv_sub_device *sub = to_bttv_sub_dev(dev);
	struct dvb_bt8xx_card *card;
	struct pci_dev* bttv_pci_dev;
	int ret;

	if (!(card = kmalloc(sizeof(struct dvb_bt8xx_card), GFP_KERNEL)))
		return -ENOMEM;

	memset(card, 0, sizeof(*card));
	init_MUTEX(&card->lock);
	card->bttv_nr = sub->core->nr;
	strncpy(card->card_name, sub->core->name, sizeof(sub->core->name));
	card->i2c_adapter = &sub->core->i2c_adap;

	switch(sub->core->type) {
	case BTTV_PINNACLESAT:
		card->gpio_mode = 0x0400c060;
		/* should be: BT878_A_GAIN=0,BT878_A_PWRDN,BT878_DA_DPM,BT878_DA_SBR,
			      BT878_DA_IOM=1,BT878_DA_APP to enable serial highspeed mode. */
		card->op_sync_orin = 0;
		card->irq_err_ignore = 0;
		break;

#ifdef BTTV_DVICO_DVBT_LITE
	case BTTV_DVICO_DVBT_LITE:
#endif
		card->gpio_mode = 0x0400C060;
		card->op_sync_orin = 0;
		card->irq_err_ignore = 0;
		/* 26, 15, 14, 6, 5
		 * A_PWRDN  DA_DPM DA_SBR DA_IOM_DA
		 * DA_APP(parallel) */
		break;

#ifdef BTTV_TWINHAN_VP3021
	case BTTV_TWINHAN_VP3021:
#else
	case BTTV_NEBULA_DIGITV:
#endif
	case BTTV_AVDVBT_761:
		card->gpio_mode = (1 << 26) | (1 << 14) | (1 << 5);
		card->op_sync_orin = 0;
		card->irq_err_ignore = 0;
		/* A_PWRDN DA_SBR DA_APP (high speed serial) */
		break;

	case BTTV_AVDVBT_771: //case 0x07711461:
		card->gpio_mode = 0x0400402B;
		card->op_sync_orin = BT878_RISC_SYNC_MASK;
		card->irq_err_ignore = 0;
		/* A_PWRDN DA_SBR  DA_APP[0] PKTP=10 RISC_ENABLE FIFO_ENABLE*/
		break;

	case BTTV_TWINHAN_DST:
		card->gpio_mode = 0x2204f2c;
		card->op_sync_orin = BT878_RISC_SYNC_MASK;
		card->irq_err_ignore = BT878_APABORT | BT878_ARIPERR |
				       BT878_APPERR | BT878_AFBUS;
		/* 25,21,14,11,10,9,8,3,2 then
		 * 0x33 = 5,4,1,0
		 * A_SEL=SML, DA_MLB, DA_SBR,
		 * DA_SDR=f, fifo trigger = 32 DWORDS
		 * IOM = 0 == audio A/D
		 * DPM = 0 == digital audio mode
		 * == async data parallel port
		 * then 0x33 (13 is set by start_capture)
		 * DA_APP = async data parallel port,
		 * ACAP_EN = 1,
		 * RISC+FIFO ENABLE */
		break;

	case BTTV_PC_HDTV:
		card->gpio_mode = 0x0100EC7B;
		card->op_sync_orin = 0;
		card->irq_err_ignore = 0;
		break;

	default:
		printk(KERN_WARNING "dvb_bt8xx: Unknown bttv card type: %d.\n",
				sub->core->type);
		kfree(card);
		return -ENODEV;
	}

	dprintk("dvb_bt8xx: identified card%d as %s\n", card->bttv_nr, card->card_name);

	if (!(bttv_pci_dev = bttv_get_pcidev(card->bttv_nr))) {
		printk("dvb_bt8xx: no pci device for card %d\n", card->bttv_nr);
		kfree(card);
		return -EFAULT;
	}

	if (!(card->bt = dvb_bt8xx_878_match(card->bttv_nr, bttv_pci_dev))) {
		printk("dvb_bt8xx: unable to determine DMA core of card %d,\n",
		       card->bttv_nr);
		printk("dvb_bt8xx: if you have the ALSA bt87x audio driver "
		       "installed, try removing it.\n");

		kfree(card);
		return -EFAULT;
	}

	init_MUTEX(&card->bt->gpio_lock);
	card->bt->bttv_nr = sub->core->nr;

	if ( (ret = dvb_bt8xx_load_card(card, sub->core->type)) ) {
		kfree(card);
		return ret;
	}

	dev_set_drvdata(dev, card);
	return 0;
}

static int dvb_bt8xx_remove(struct device *dev)
{
	struct dvb_bt8xx_card *card = dev_get_drvdata(dev);

	dprintk("dvb_bt8xx: unloading card%d\n", card->bttv_nr);

	bt878_stop(card->bt);
	tasklet_kill(&card->bt->tasklet);
	dvb_net_release(&card->dvbnet);
	card->demux.dmx.remove_frontend(&card->demux.dmx, &card->fe_mem);
	card->demux.dmx.remove_frontend(&card->demux.dmx, &card->fe_hw);
	dvb_dmxdev_release(&card->dmxdev);
	dvb_dmx_release(&card->demux);
	if (card->fe)
		dvb_unregister_frontend(card->fe);
	dvb_unregister_adapter(&card->dvb_adapter);

	kfree(card);

	return 0;
}

static struct bttv_sub_driver driver = {
	.drv = {
		.name		= "dvb-bt8xx",
		.probe		= dvb_bt8xx_probe,
		.remove		= dvb_bt8xx_remove,
		/* FIXME:
		 * .shutdown	= dvb_bt8xx_shutdown,
		 * .suspend	= dvb_bt8xx_suspend,
		 * .resume	= dvb_bt8xx_resume,
		 */
	},
};

static int __init dvb_bt8xx_init(void)
{
	return bttv_sub_register(&driver, "dvb");
}

static void __exit dvb_bt8xx_exit(void)
{
	bttv_sub_unregister(&driver);
}

module_init(dvb_bt8xx_init);
module_exit(dvb_bt8xx_exit);

MODULE_DESCRIPTION("Bt8xx based DVB adapter driver");
MODULE_AUTHOR("Florian Schirmer <[e-mail]>");
MODULE_LICENSE("GPL");